Commit | Line | Data |
---|---|---|
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 | |
6f7edb48 CB |
44 | /* Connections' size value needed by ip_vs_ctl.c */ |
45 | extern int ip_vs_conn_tab_size; | |
46 | ||
64aae3cb | 47 | struct ip_vs_iphdr { |
4fd9beef | 48 | int hdr_flags; /* ipvs flags */ |
b0e010c5 | 49 | __u32 off; /* Where IP or IPv4 header starts */ |
63dca2c0 | 50 | __u32 len; /* IPv4 simply where L4 starts |
07dcc686 | 51 | * IPv6 where L4 Transport Header starts */ |
63dca2c0 JDB |
52 | __u16 fragoffs; /* IPv6 fragment offset, 0 if first frag (or not frag)*/ |
53 | __s16 protocol; | |
54 | __s32 flags; | |
64aae3cb JV |
55 | union nf_inet_addr saddr; |
56 | union nf_inet_addr daddr; | |
57 | }; | |
58 | ||
2f74713d | 59 | static inline void *frag_safe_skb_hp(const struct sk_buff *skb, int offset, |
6b3d9330 | 60 | int len, void *buffer) |
2f74713d JDB |
61 | { |
62 | return skb_header_pointer(skb, offset, len, buffer); | |
63 | } | |
2f74713d | 64 | |
63dca2c0 JDB |
65 | /* This function handles filling *ip_vs_iphdr, both for IPv4 and IPv6. |
66 | * IPv6 requires some extra work, as finding proper header position, | |
67 | * depend on the IPv6 extension headers. | |
68 | */ | |
b0e010c5 AG |
69 | static inline int |
70 | ip_vs_fill_iph_skb_off(int af, const struct sk_buff *skb, int offset, | |
4fd9beef | 71 | int hdr_flags, struct ip_vs_iphdr *iphdr) |
64aae3cb | 72 | { |
4fd9beef | 73 | iphdr->hdr_flags = hdr_flags; |
b0e010c5 | 74 | iphdr->off = offset; |
4fd9beef | 75 | |
64aae3cb JV |
76 | #ifdef CONFIG_IP_VS_IPV6 |
77 | if (af == AF_INET6) { | |
b0e010c5 AG |
78 | struct ipv6hdr _iph; |
79 | const struct ipv6hdr *iph = skb_header_pointer( | |
80 | skb, offset, sizeof(_iph), &_iph); | |
81 | if (!iph) | |
82 | return 0; | |
83 | ||
4e3fd7a0 AD |
84 | iphdr->saddr.in6 = iph->saddr; |
85 | iphdr->daddr.in6 = iph->daddr; | |
6aafeef0 | 86 | /* ipv6_find_hdr() updates len, flags */ |
b0e010c5 | 87 | iphdr->len = offset; |
63dca2c0 JDB |
88 | iphdr->flags = 0; |
89 | iphdr->protocol = ipv6_find_hdr(skb, &iphdr->len, -1, | |
90 | &iphdr->fragoffs, | |
91 | &iphdr->flags); | |
b0e010c5 AG |
92 | if (iphdr->protocol < 0) |
93 | return 0; | |
64aae3cb JV |
94 | } else |
95 | #endif | |
96 | { | |
b0e010c5 AG |
97 | struct iphdr _iph; |
98 | const struct iphdr *iph = skb_header_pointer( | |
99 | skb, offset, sizeof(_iph), &_iph); | |
100 | if (!iph) | |
101 | return 0; | |
102 | ||
103 | iphdr->len = offset + iph->ihl * 4; | |
63dca2c0 JDB |
104 | iphdr->fragoffs = 0; |
105 | iphdr->protocol = iph->protocol; | |
106 | iphdr->saddr.ip = iph->saddr; | |
107 | iphdr->daddr.ip = iph->daddr; | |
108 | } | |
b0e010c5 AG |
109 | |
110 | return 1; | |
111 | } | |
112 | ||
113 | static inline int | |
4fd9beef AG |
114 | ip_vs_fill_iph_skb_icmp(int af, const struct sk_buff *skb, int offset, |
115 | bool inverse, struct ip_vs_iphdr *iphdr) | |
116 | { | |
117 | int hdr_flags = IP_VS_HDR_ICMP; | |
118 | ||
119 | if (inverse) | |
120 | hdr_flags |= IP_VS_HDR_INVERSE; | |
121 | ||
122 | return ip_vs_fill_iph_skb_off(af, skb, offset, hdr_flags, iphdr); | |
123 | } | |
124 | ||
125 | static inline int | |
126 | ip_vs_fill_iph_skb(int af, const struct sk_buff *skb, bool inverse, | |
127 | struct ip_vs_iphdr *iphdr) | |
128 | { | |
129 | int hdr_flags = 0; | |
130 | ||
131 | if (inverse) | |
132 | hdr_flags |= IP_VS_HDR_INVERSE; | |
133 | ||
134 | return ip_vs_fill_iph_skb_off(af, skb, skb_network_offset(skb), | |
135 | hdr_flags, iphdr); | |
136 | } | |
137 | ||
138 | static inline bool | |
139 | ip_vs_iph_inverse(const struct ip_vs_iphdr *iph) | |
140 | { | |
141 | return !!(iph->hdr_flags & IP_VS_HDR_INVERSE); | |
142 | } | |
143 | ||
144 | static inline bool | |
145 | ip_vs_iph_icmp(const struct ip_vs_iphdr *iph) | |
b0e010c5 | 146 | { |
4fd9beef | 147 | return !!(iph->hdr_flags & IP_VS_HDR_ICMP); |
63dca2c0 JDB |
148 | } |
149 | ||
64aae3cb JV |
150 | static inline void ip_vs_addr_copy(int af, union nf_inet_addr *dst, |
151 | const union nf_inet_addr *src) | |
152 | { | |
153 | #ifdef CONFIG_IP_VS_IPV6 | |
154 | if (af == AF_INET6) | |
4e3fd7a0 | 155 | dst->in6 = src->in6; |
64aae3cb JV |
156 | else |
157 | #endif | |
158 | dst->ip = src->ip; | |
159 | } | |
160 | ||
9a05475c JA |
161 | static inline void ip_vs_addr_set(int af, union nf_inet_addr *dst, |
162 | const union nf_inet_addr *src) | |
163 | { | |
164 | #ifdef CONFIG_IP_VS_IPV6 | |
165 | if (af == AF_INET6) { | |
166 | dst->in6 = src->in6; | |
167 | return; | |
168 | } | |
169 | #endif | |
170 | dst->ip = src->ip; | |
171 | dst->all[1] = 0; | |
172 | dst->all[2] = 0; | |
173 | dst->all[3] = 0; | |
174 | } | |
175 | ||
64aae3cb JV |
176 | static inline int ip_vs_addr_equal(int af, const union nf_inet_addr *a, |
177 | const union nf_inet_addr *b) | |
178 | { | |
179 | #ifdef CONFIG_IP_VS_IPV6 | |
180 | if (af == AF_INET6) | |
181 | return ipv6_addr_equal(&a->in6, &b->in6); | |
182 | #endif | |
183 | return a->ip == b->ip; | |
184 | } | |
185 | ||
1da177e4 | 186 | #ifdef CONFIG_IP_VS_DEBUG |
14c85021 ACM |
187 | #include <linux/net.h> |
188 | ||
5c3a0fd7 | 189 | int ip_vs_get_debug_level(void); |
c842a3ad JV |
190 | |
191 | static inline const char *ip_vs_dbg_addr(int af, char *buf, size_t buf_len, | |
192 | const union nf_inet_addr *addr, | |
193 | int *idx) | |
194 | { | |
195 | int len; | |
196 | #ifdef CONFIG_IP_VS_IPV6 | |
197 | if (af == AF_INET6) | |
120b9c14 | 198 | len = snprintf(&buf[*idx], buf_len - *idx, "[%pI6c]", |
0c6ce78a | 199 | &addr->in6) + 1; |
c842a3ad JV |
200 | else |
201 | #endif | |
3685f25d HH |
202 | len = snprintf(&buf[*idx], buf_len - *idx, "%pI4", |
203 | &addr->ip) + 1; | |
c842a3ad JV |
204 | |
205 | *idx += len; | |
206 | BUG_ON(*idx > buf_len + 1); | |
207 | return &buf[*idx - len]; | |
208 | } | |
209 | ||
9aada7ac HE |
210 | #define IP_VS_DBG_BUF(level, msg, ...) \ |
211 | do { \ | |
212 | char ip_vs_dbg_buf[160]; \ | |
213 | int ip_vs_dbg_idx = 0; \ | |
214 | if (level <= ip_vs_get_debug_level()) \ | |
215 | printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ | |
216 | } while (0) | |
217 | #define IP_VS_ERR_BUF(msg...) \ | |
218 | do { \ | |
219 | char ip_vs_dbg_buf[160]; \ | |
220 | int ip_vs_dbg_idx = 0; \ | |
221 | pr_err(msg); \ | |
222 | } while (0) | |
c842a3ad JV |
223 | |
224 | /* Only use from within IP_VS_DBG_BUF() or IP_VS_ERR_BUF macros */ | |
9aada7ac HE |
225 | #define IP_VS_DBG_ADDR(af, addr) \ |
226 | ip_vs_dbg_addr(af, ip_vs_dbg_buf, \ | |
227 | sizeof(ip_vs_dbg_buf), addr, \ | |
228 | &ip_vs_dbg_idx) | |
229 | ||
230 | #define IP_VS_DBG(level, msg, ...) \ | |
231 | do { \ | |
232 | if (level <= ip_vs_get_debug_level()) \ | |
233 | printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ | |
234 | } while (0) | |
235 | #define IP_VS_DBG_RL(msg, ...) \ | |
236 | do { \ | |
237 | if (net_ratelimit()) \ | |
238 | printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ | |
239 | } while (0) | |
0d79641a | 240 | #define IP_VS_DBG_PKT(level, af, pp, skb, ofs, msg) \ |
9aada7ac HE |
241 | do { \ |
242 | if (level <= ip_vs_get_debug_level()) \ | |
0d79641a | 243 | pp->debug_packet(af, pp, skb, ofs, msg); \ |
9aada7ac | 244 | } while (0) |
0d79641a | 245 | #define IP_VS_DBG_RL_PKT(level, af, pp, skb, ofs, msg) \ |
9aada7ac HE |
246 | do { \ |
247 | if (level <= ip_vs_get_debug_level() && \ | |
248 | net_ratelimit()) \ | |
0d79641a | 249 | pp->debug_packet(af, pp, skb, ofs, msg); \ |
9aada7ac | 250 | } while (0) |
1da177e4 | 251 | #else /* NO DEBUGGING at ALL */ |
c842a3ad JV |
252 | #define IP_VS_DBG_BUF(level, msg...) do {} while (0) |
253 | #define IP_VS_ERR_BUF(msg...) do {} while (0) | |
1da177e4 LT |
254 | #define IP_VS_DBG(level, msg...) do {} while (0) |
255 | #define IP_VS_DBG_RL(msg...) do {} while (0) | |
0d79641a JA |
256 | #define IP_VS_DBG_PKT(level, af, pp, skb, ofs, msg) do {} while (0) |
257 | #define IP_VS_DBG_RL_PKT(level, af, pp, skb, ofs, msg) do {} while (0) | |
1da177e4 LT |
258 | #endif |
259 | ||
260 | #define IP_VS_BUG() BUG() | |
1e3e238e | 261 | #define IP_VS_ERR_RL(msg, ...) \ |
9aada7ac HE |
262 | do { \ |
263 | if (net_ratelimit()) \ | |
1e3e238e | 264 | pr_err(msg, ##__VA_ARGS__); \ |
9aada7ac | 265 | } while (0) |
1da177e4 LT |
266 | |
267 | #ifdef CONFIG_IP_VS_DEBUG | |
268 | #define EnterFunction(level) \ | |
9aada7ac HE |
269 | do { \ |
270 | if (level <= ip_vs_get_debug_level()) \ | |
271 | printk(KERN_DEBUG \ | |
272 | pr_fmt("Enter: %s, %s line %i\n"), \ | |
273 | __func__, __FILE__, __LINE__); \ | |
274 | } while (0) | |
275 | #define LeaveFunction(level) \ | |
276 | do { \ | |
277 | if (level <= ip_vs_get_debug_level()) \ | |
278 | printk(KERN_DEBUG \ | |
279 | pr_fmt("Leave: %s, %s line %i\n"), \ | |
280 | __func__, __FILE__, __LINE__); \ | |
281 | } while (0) | |
1da177e4 LT |
282 | #else |
283 | #define EnterFunction(level) do {} while (0) | |
284 | #define LeaveFunction(level) do {} while (0) | |
285 | #endif | |
286 | ||
07dcc686 | 287 | /* The port number of FTP service (in network order). */ |
f3a7c66b HH |
288 | #define FTPPORT cpu_to_be16(21) |
289 | #define FTPDATA cpu_to_be16(20) | |
1da177e4 | 290 | |
07dcc686 | 291 | /* TCP State Values */ |
1da177e4 LT |
292 | enum { |
293 | IP_VS_TCP_S_NONE = 0, | |
294 | IP_VS_TCP_S_ESTABLISHED, | |
295 | IP_VS_TCP_S_SYN_SENT, | |
296 | IP_VS_TCP_S_SYN_RECV, | |
297 | IP_VS_TCP_S_FIN_WAIT, | |
298 | IP_VS_TCP_S_TIME_WAIT, | |
299 | IP_VS_TCP_S_CLOSE, | |
300 | IP_VS_TCP_S_CLOSE_WAIT, | |
301 | IP_VS_TCP_S_LAST_ACK, | |
302 | IP_VS_TCP_S_LISTEN, | |
303 | IP_VS_TCP_S_SYNACK, | |
304 | IP_VS_TCP_S_LAST | |
305 | }; | |
306 | ||
07dcc686 | 307 | /* UDP State Values */ |
1da177e4 LT |
308 | enum { |
309 | IP_VS_UDP_S_NORMAL, | |
310 | IP_VS_UDP_S_LAST, | |
311 | }; | |
312 | ||
07dcc686 | 313 | /* ICMP State Values */ |
1da177e4 LT |
314 | enum { |
315 | IP_VS_ICMP_S_NORMAL, | |
316 | IP_VS_ICMP_S_LAST, | |
317 | }; | |
318 | ||
07dcc686 | 319 | /* SCTP State Values */ |
2906f66a VMR |
320 | enum ip_vs_sctp_states { |
321 | IP_VS_SCTP_S_NONE, | |
61e7c420 JA |
322 | IP_VS_SCTP_S_INIT1, |
323 | IP_VS_SCTP_S_INIT, | |
324 | IP_VS_SCTP_S_COOKIE_SENT, | |
325 | IP_VS_SCTP_S_COOKIE_REPLIED, | |
326 | IP_VS_SCTP_S_COOKIE_WAIT, | |
327 | IP_VS_SCTP_S_COOKIE, | |
328 | IP_VS_SCTP_S_COOKIE_ECHOED, | |
2906f66a | 329 | IP_VS_SCTP_S_ESTABLISHED, |
61e7c420 JA |
330 | IP_VS_SCTP_S_SHUTDOWN_SENT, |
331 | IP_VS_SCTP_S_SHUTDOWN_RECEIVED, | |
332 | IP_VS_SCTP_S_SHUTDOWN_ACK_SENT, | |
333 | IP_VS_SCTP_S_REJECTED, | |
2906f66a VMR |
334 | IP_VS_SCTP_S_CLOSED, |
335 | IP_VS_SCTP_S_LAST | |
336 | }; | |
337 | ||
27541143 JA |
338 | /* Connection templates use bits from state */ |
339 | #define IP_VS_CTPL_S_NONE 0x0000 | |
340 | #define IP_VS_CTPL_S_ASSURED 0x0001 | |
341 | #define IP_VS_CTPL_S_LAST 0x0002 | |
342 | ||
07dcc686 SH |
343 | /* Delta sequence info structure |
344 | * Each ip_vs_conn has 2 (output AND input seq. changes). | |
345 | * Only used in the VS/NAT. | |
1da177e4 LT |
346 | */ |
347 | struct ip_vs_seq { | |
348 | __u32 init_seq; /* Add delta from this seq */ | |
349 | __u32 delta; /* Delta in sequence numbers */ | |
350 | __u32 previous_delta; /* Delta in sequence numbers | |
07dcc686 | 351 | * before last resized pkt */ |
1da177e4 LT |
352 | }; |
353 | ||
07dcc686 | 354 | /* counters per cpu */ |
b17fc996 | 355 | struct ip_vs_counters { |
cd67cd5e JA |
356 | __u64 conns; /* connections scheduled */ |
357 | __u64 inpkts; /* incoming packets */ | |
358 | __u64 outpkts; /* outgoing packets */ | |
b17fc996 HS |
359 | __u64 inbytes; /* incoming bytes */ |
360 | __u64 outbytes; /* outgoing bytes */ | |
361 | }; | |
07dcc686 | 362 | /* Stats per cpu */ |
b17fc996 | 363 | struct ip_vs_cpu_stats { |
cd67cd5e | 364 | struct ip_vs_counters cnt; |
b17fc996 HS |
365 | struct u64_stats_sync syncp; |
366 | }; | |
1da177e4 | 367 | |
07dcc686 | 368 | /* IPVS statistics objects */ |
3a14a313 SW |
369 | struct ip_vs_estimator { |
370 | struct list_head list; | |
371 | ||
372 | u64 last_inbytes; | |
373 | u64 last_outbytes; | |
cd67cd5e JA |
374 | u64 last_conns; |
375 | u64 last_inpkts; | |
376 | u64 last_outpkts; | |
377 | ||
378 | u64 cps; | |
379 | u64 inpps; | |
380 | u64 outpps; | |
381 | u64 inbps; | |
382 | u64 outbps; | |
383 | }; | |
384 | ||
385 | /* | |
386 | * IPVS statistics object, 64-bit kernel version of struct ip_vs_stats_user | |
387 | */ | |
388 | struct ip_vs_kstats { | |
389 | u64 conns; /* connections scheduled */ | |
390 | u64 inpkts; /* incoming packets */ | |
391 | u64 outpkts; /* outgoing packets */ | |
392 | u64 inbytes; /* incoming bytes */ | |
393 | u64 outbytes; /* outgoing bytes */ | |
394 | ||
395 | u64 cps; /* current connection rate */ | |
396 | u64 inpps; /* current in packet rate */ | |
397 | u64 outpps; /* current out packet rate */ | |
398 | u64 inbps; /* current in byte rate */ | |
399 | u64 outbps; /* current out byte rate */ | |
3a14a313 SW |
400 | }; |
401 | ||
fd2c3ef7 | 402 | struct ip_vs_stats { |
cd67cd5e | 403 | struct ip_vs_kstats kstats; /* kernel statistics */ |
e9c0ce23 | 404 | struct ip_vs_estimator est; /* estimator */ |
b962abdc | 405 | struct ip_vs_cpu_stats __percpu *cpustats; /* per cpu counters */ |
b17fc996 | 406 | spinlock_t lock; /* spin lock */ |
cd67cd5e | 407 | struct ip_vs_kstats kstats0; /* reset values */ |
1da177e4 LT |
408 | }; |
409 | ||
14c85021 ACM |
410 | struct dst_entry; |
411 | struct iphdr; | |
1da177e4 LT |
412 | struct ip_vs_conn; |
413 | struct ip_vs_app; | |
14c85021 | 414 | struct sk_buff; |
252c6410 | 415 | struct ip_vs_proto_data; |
1da177e4 LT |
416 | |
417 | struct ip_vs_protocol { | |
418 | struct ip_vs_protocol *next; | |
419 | char *name; | |
2ad17def JA |
420 | u16 protocol; |
421 | u16 num_states; | |
1da177e4 | 422 | int dont_defrag; |
1da177e4 LT |
423 | |
424 | void (*init)(struct ip_vs_protocol *pp); | |
425 | ||
426 | void (*exit)(struct ip_vs_protocol *pp); | |
427 | ||
1281a9c2 | 428 | int (*init_netns)(struct netns_ipvs *ipvs, struct ip_vs_proto_data *pd); |
252c6410 | 429 | |
1281a9c2 | 430 | void (*exit_netns)(struct netns_ipvs *ipvs, struct ip_vs_proto_data *pd); |
252c6410 | 431 | |
d8f44c33 EB |
432 | int (*conn_schedule)(struct netns_ipvs *ipvs, |
433 | int af, struct sk_buff *skb, | |
9330419d | 434 | struct ip_vs_proto_data *pd, |
d4383f04 JDB |
435 | int *verdict, struct ip_vs_conn **cpp, |
436 | struct ip_vs_iphdr *iph); | |
1da177e4 LT |
437 | |
438 | struct ip_vs_conn * | |
ab161976 EB |
439 | (*conn_in_get)(struct netns_ipvs *ipvs, |
440 | int af, | |
51ef348b | 441 | const struct sk_buff *skb, |
802c41ad | 442 | const struct ip_vs_iphdr *iph); |
1da177e4 LT |
443 | |
444 | struct ip_vs_conn * | |
0cf705c8 EB |
445 | (*conn_out_get)(struct netns_ipvs *ipvs, |
446 | int af, | |
51ef348b | 447 | const struct sk_buff *skb, |
802c41ad | 448 | const struct ip_vs_iphdr *iph); |
1da177e4 | 449 | |
d4383f04 JDB |
450 | int (*snat_handler)(struct sk_buff *skb, struct ip_vs_protocol *pp, |
451 | struct ip_vs_conn *cp, struct ip_vs_iphdr *iph); | |
1da177e4 | 452 | |
d4383f04 JDB |
453 | int (*dnat_handler)(struct sk_buff *skb, struct ip_vs_protocol *pp, |
454 | struct ip_vs_conn *cp, struct ip_vs_iphdr *iph); | |
1da177e4 | 455 | |
1da177e4 LT |
456 | const char *(*state_name)(int state); |
457 | ||
4a516f11 SH |
458 | void (*state_transition)(struct ip_vs_conn *cp, int direction, |
459 | const struct sk_buff *skb, | |
460 | struct ip_vs_proto_data *pd); | |
1da177e4 | 461 | |
19648918 | 462 | int (*register_app)(struct netns_ipvs *ipvs, struct ip_vs_app *inc); |
1da177e4 | 463 | |
19648918 | 464 | void (*unregister_app)(struct netns_ipvs *ipvs, struct ip_vs_app *inc); |
1da177e4 LT |
465 | |
466 | int (*app_conn_bind)(struct ip_vs_conn *cp); | |
467 | ||
0d79641a | 468 | void (*debug_packet)(int af, struct ip_vs_protocol *pp, |
1da177e4 LT |
469 | const struct sk_buff *skb, |
470 | int offset, | |
471 | const char *msg); | |
472 | ||
9330419d | 473 | void (*timeout_change)(struct ip_vs_proto_data *pd, int flags); |
1da177e4 LT |
474 | }; |
475 | ||
07dcc686 | 476 | /* protocol data per netns */ |
252c6410 HS |
477 | struct ip_vs_proto_data { |
478 | struct ip_vs_proto_data *next; | |
479 | struct ip_vs_protocol *pp; | |
480 | int *timeout_table; /* protocol timeout table */ | |
481 | atomic_t appcnt; /* counter of proto app incs. */ | |
482 | struct tcp_states_t *tcp_state_table; | |
483 | }; | |
484 | ||
5c3a0fd7 | 485 | struct ip_vs_protocol *ip_vs_proto_get(unsigned short proto); |
18d6ade6 | 486 | struct ip_vs_proto_data *ip_vs_proto_data_get(struct netns_ipvs *ipvs, |
5c3a0fd7 | 487 | unsigned short proto); |
1da177e4 | 488 | |
f11017ec | 489 | struct ip_vs_conn_param { |
e64e2b46 | 490 | struct netns_ipvs *ipvs; |
f11017ec SH |
491 | const union nf_inet_addr *caddr; |
492 | const union nf_inet_addr *vaddr; | |
493 | __be16 cport; | |
494 | __be16 vport; | |
495 | __u16 protocol; | |
496 | u16 af; | |
85999283 SH |
497 | |
498 | const struct ip_vs_pe *pe; | |
499 | char *pe_data; | |
500 | __u8 pe_data_len; | |
f11017ec SH |
501 | }; |
502 | ||
07dcc686 | 503 | /* IP_VS structure allocated for each dynamically scheduled connection */ |
1da177e4 | 504 | struct ip_vs_conn { |
731109e7 | 505 | struct hlist_node c_list; /* hashed list heads */ |
1da177e4 | 506 | /* Protocol, addresses and port numbers */ |
6e67e586 | 507 | __be16 cport; |
6e67e586 | 508 | __be16 dport; |
1845ed0b JA |
509 | __be16 vport; |
510 | u16 af; /* address family */ | |
6e67e586 HS |
511 | union nf_inet_addr caddr; /* client address */ |
512 | union nf_inet_addr vaddr; /* virtual address */ | |
513 | union nf_inet_addr daddr; /* destination address */ | |
514 | volatile __u32 flags; /* status flags */ | |
1da177e4 | 515 | __u16 protocol; /* Which protocol (TCP/UDP) */ |
ba38528a | 516 | __u16 daf; /* Address family of the dest */ |
58dbc6f2 | 517 | struct netns_ipvs *ipvs; |
1da177e4 LT |
518 | |
519 | /* counter and timer */ | |
b54ab92b | 520 | refcount_t refcnt; /* reference count */ |
1da177e4 LT |
521 | struct timer_list timer; /* Expiration timer */ |
522 | volatile unsigned long timeout; /* timeout */ | |
523 | ||
524 | /* Flags and state transition */ | |
525 | spinlock_t lock; /* lock for state transition */ | |
1da177e4 | 526 | volatile __u16 state; /* state info */ |
efac5276 RB |
527 | volatile __u16 old_state; /* old state, to be used for |
528 | * state transition triggerd | |
529 | * synchronization | |
530 | */ | |
1845ed0b | 531 | __u32 fwmark; /* Fire wall mark from skb */ |
749c42b6 | 532 | unsigned long sync_endtime; /* jiffies + sent_retries */ |
1da177e4 LT |
533 | |
534 | /* Control members */ | |
535 | struct ip_vs_conn *control; /* Master control connection */ | |
536 | atomic_t n_control; /* Number of controlled ones */ | |
537 | struct ip_vs_dest *dest; /* real server */ | |
538 | atomic_t in_pkts; /* incoming packet counter */ | |
539 | ||
07dcc686 SH |
540 | /* Packet transmitter for different forwarding methods. If it |
541 | * mangles the packet, it must return NF_DROP or better NF_STOLEN, | |
542 | * otherwise this must be changed to a sk_buff **. | |
543 | * NF_ACCEPT can be returned when destination is local. | |
1da177e4 LT |
544 | */ |
545 | int (*packet_xmit)(struct sk_buff *skb, struct ip_vs_conn *cp, | |
d4383f04 | 546 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); |
1da177e4 LT |
547 | |
548 | /* Note: we can group the following members into a structure, | |
07dcc686 SH |
549 | * in order to save more space, and the following members are |
550 | * only used in VS/NAT anyway | |
551 | */ | |
1da177e4 LT |
552 | struct ip_vs_app *app; /* bound ip_vs_app object */ |
553 | void *app_data; /* Application private data */ | |
554 | struct ip_vs_seq in_seq; /* incoming seq. struct */ | |
555 | struct ip_vs_seq out_seq; /* outgoing seq. struct */ | |
85999283 | 556 | |
e9e5eee8 | 557 | const struct ip_vs_pe *pe; |
85999283 SH |
558 | char *pe_data; |
559 | __u8 pe_data_len; | |
088339a5 JA |
560 | |
561 | struct rcu_head rcu_head; | |
1da177e4 LT |
562 | }; |
563 | ||
07dcc686 SH |
564 | /* Extended internal versions of struct ip_vs_service_user and ip_vs_dest_user |
565 | * for IPv6 support. | |
c860c6b1 | 566 | * |
07dcc686 SH |
567 | * We need these to conveniently pass around service and destination |
568 | * options, but unfortunately, we also need to keep the old definitions to | |
569 | * maintain userspace backwards compatibility for the setsockopt interface. | |
c860c6b1 JV |
570 | */ |
571 | struct ip_vs_service_user_kern { | |
572 | /* virtual service addresses */ | |
573 | u16 af; | |
574 | u16 protocol; | |
575 | union nf_inet_addr addr; /* virtual ip address */ | |
0a925864 | 576 | __be16 port; |
c860c6b1 JV |
577 | u32 fwmark; /* firwall mark of service */ |
578 | ||
579 | /* virtual service options */ | |
580 | char *sched_name; | |
0d1e71b0 | 581 | char *pe_name; |
95c96174 ED |
582 | unsigned int flags; /* virtual service flags */ |
583 | unsigned int timeout; /* persistent timeout in sec */ | |
0a925864 | 584 | __be32 netmask; /* persistent netmask or plen */ |
c860c6b1 JV |
585 | }; |
586 | ||
587 | ||
588 | struct ip_vs_dest_user_kern { | |
589 | /* destination server address */ | |
590 | union nf_inet_addr addr; | |
0a925864 | 591 | __be16 port; |
c860c6b1 JV |
592 | |
593 | /* real server options */ | |
95c96174 | 594 | unsigned int conn_flags; /* connection flags */ |
c860c6b1 JV |
595 | int weight; /* destination weight */ |
596 | ||
597 | /* thresholds for active connections */ | |
598 | u32 u_threshold; /* upper threshold */ | |
599 | u32 l_threshold; /* lower threshold */ | |
6cff339b AG |
600 | |
601 | /* Address family of addr */ | |
602 | u16 af; | |
84c0d5e9 JH |
603 | |
604 | u16 tun_type; /* tunnel type */ | |
605 | __be16 tun_port; /* tunnel port */ | |
c860c6b1 JV |
606 | }; |
607 | ||
608 | ||
1da177e4 | 609 | /* |
07dcc686 SH |
610 | * The information about the virtual service offered to the net and the |
611 | * forwarding entries. | |
1da177e4 LT |
612 | */ |
613 | struct ip_vs_service { | |
ceec4c38 JA |
614 | struct hlist_node s_list; /* for normal service table */ |
615 | struct hlist_node f_list; /* for fwmark-based service table */ | |
1da177e4 | 616 | atomic_t refcnt; /* reference counter */ |
1da177e4 | 617 | |
e7ade46a | 618 | u16 af; /* address family */ |
1da177e4 | 619 | __u16 protocol; /* which protocol (TCP/UDP) */ |
e7ade46a | 620 | union nf_inet_addr addr; /* IP address for virtual service */ |
014d730d | 621 | __be16 port; /* port number for the service */ |
1da177e4 | 622 | __u32 fwmark; /* firewall mark of the service */ |
95c96174 ED |
623 | unsigned int flags; /* service status flags */ |
624 | unsigned int timeout; /* persistent timeout in ticks */ | |
0a925864 | 625 | __be32 netmask; /* grouping granularity, mask/plen */ |
3109d2f2 | 626 | struct netns_ipvs *ipvs; |
1da177e4 LT |
627 | |
628 | struct list_head destinations; /* real server d-linked list */ | |
629 | __u32 num_dests; /* number of servers */ | |
630 | struct ip_vs_stats stats; /* statistics for the service */ | |
1da177e4 LT |
631 | |
632 | /* for scheduling */ | |
ceec4c38 | 633 | struct ip_vs_scheduler __rcu *scheduler; /* bound scheduler object */ |
ba3a3ce1 | 634 | spinlock_t sched_lock; /* lock sched_data */ |
1da177e4 | 635 | void *sched_data; /* scheduler application data */ |
85999283 SH |
636 | |
637 | /* alternate persistence engine */ | |
ceec4c38 | 638 | struct ip_vs_pe __rcu *pe; |
31875d49 | 639 | int conntrack_afmask; |
ceec4c38 JA |
640 | |
641 | struct rcu_head rcu_head; | |
1da177e4 LT |
642 | }; |
643 | ||
026ace06 JA |
644 | /* Information for cached dst */ |
645 | struct ip_vs_dest_dst { | |
646 | struct dst_entry *dst_cache; /* destination cache entry */ | |
647 | u32 dst_cookie; | |
648 | union nf_inet_addr dst_saddr; | |
649 | struct rcu_head rcu_head; | |
650 | }; | |
1da177e4 | 651 | |
07dcc686 SH |
652 | /* The real server destination forwarding entry with ip address, port number, |
653 | * and so on. | |
1da177e4 LT |
654 | */ |
655 | struct ip_vs_dest { | |
656 | struct list_head n_list; /* for the dests in the service */ | |
276472ea | 657 | struct hlist_node d_list; /* for table with all the dests */ |
1da177e4 | 658 | |
e7ade46a | 659 | u16 af; /* address family */ |
014d730d | 660 | __be16 port; /* port number of the server */ |
f2431e6e | 661 | union nf_inet_addr addr; /* IP address of the server */ |
95c96174 | 662 | volatile unsigned int flags; /* dest status flags */ |
1da177e4 LT |
663 | atomic_t conn_flags; /* flags to copy to conn */ |
664 | atomic_t weight; /* server weight */ | |
a2c09ac0 | 665 | atomic_t last_weight; /* server latest weight */ |
84c0d5e9 JH |
666 | __u16 tun_type; /* tunnel type */ |
667 | __be16 tun_port; /* tunnel port */ | |
1da177e4 | 668 | |
b54ab92b | 669 | refcount_t refcnt; /* reference counter */ |
1da177e4 | 670 | struct ip_vs_stats stats; /* statistics */ |
bcbde4c0 | 671 | unsigned long idle_start; /* start time, jiffies */ |
1da177e4 LT |
672 | |
673 | /* connection counters and thresholds */ | |
674 | atomic_t activeconns; /* active connections */ | |
675 | atomic_t inactconns; /* inactive connections */ | |
676 | atomic_t persistconns; /* persistent connections */ | |
677 | __u32 u_threshold; /* upper threshold */ | |
678 | __u32 l_threshold; /* lower threshold */ | |
679 | ||
680 | /* for destination cache */ | |
681 | spinlock_t dst_lock; /* lock of dst_cache */ | |
026ace06 | 682 | struct ip_vs_dest_dst __rcu *dest_dst; /* cached dst info */ |
1da177e4 LT |
683 | |
684 | /* for virtual service */ | |
bcbde4c0 | 685 | struct ip_vs_service __rcu *svc; /* service it belongs to */ |
1da177e4 | 686 | __u16 protocol; /* which protocol (TCP/UDP) */ |
014d730d | 687 | __be16 vport; /* virtual port number */ |
f2431e6e | 688 | union nf_inet_addr vaddr; /* virtual IP address */ |
1da177e4 | 689 | __u32 vfwmark; /* firewall mark of service */ |
276472ea | 690 | |
578bc3ef | 691 | struct list_head t_list; /* in dest_trash */ |
276472ea | 692 | unsigned int in_rs_table:1; /* we are in rs_table */ |
1da177e4 LT |
693 | }; |
694 | ||
07dcc686 | 695 | /* The scheduler object */ |
1da177e4 LT |
696 | struct ip_vs_scheduler { |
697 | struct list_head n_list; /* d-linked list head */ | |
698 | char *name; /* scheduler name */ | |
699 | atomic_t refcnt; /* reference counter */ | |
700 | struct module *module; /* THIS_MODULE/NULL */ | |
701 | ||
702 | /* scheduler initializing service */ | |
703 | int (*init_service)(struct ip_vs_service *svc); | |
704 | /* scheduling service finish */ | |
ed3ffc4e | 705 | void (*done_service)(struct ip_vs_service *svc); |
6b6df466 JA |
706 | /* dest is linked */ |
707 | int (*add_dest)(struct ip_vs_service *svc, struct ip_vs_dest *dest); | |
708 | /* dest is unlinked */ | |
709 | int (*del_dest)(struct ip_vs_service *svc, struct ip_vs_dest *dest); | |
710 | /* dest is updated */ | |
711 | int (*upd_dest)(struct ip_vs_service *svc, struct ip_vs_dest *dest); | |
1da177e4 LT |
712 | |
713 | /* selecting a server from the given service */ | |
714 | struct ip_vs_dest* (*schedule)(struct ip_vs_service *svc, | |
bba54de5 JA |
715 | const struct sk_buff *skb, |
716 | struct ip_vs_iphdr *iph); | |
1da177e4 LT |
717 | }; |
718 | ||
85999283 SH |
719 | /* The persistence engine object */ |
720 | struct ip_vs_pe { | |
721 | struct list_head n_list; /* d-linked list head */ | |
722 | char *name; /* scheduler name */ | |
723 | atomic_t refcnt; /* reference counter */ | |
724 | struct module *module; /* THIS_MODULE/NULL */ | |
725 | ||
726 | /* get the connection template, if any */ | |
727 | int (*fill_param)(struct ip_vs_conn_param *p, struct sk_buff *skb); | |
728 | bool (*ct_match)(const struct ip_vs_conn_param *p, | |
729 | struct ip_vs_conn *ct); | |
730 | u32 (*hashkey_raw)(const struct ip_vs_conn_param *p, u32 initval, | |
731 | bool inverse); | |
a3c918ac | 732 | int (*show_pe_data)(const struct ip_vs_conn *cp, char *buf); |
39b97223 MA |
733 | /* create connections for real-server outgoing packets */ |
734 | struct ip_vs_conn* (*conn_out)(struct ip_vs_service *svc, | |
735 | struct ip_vs_dest *dest, | |
736 | struct sk_buff *skb, | |
737 | const struct ip_vs_iphdr *iph, | |
738 | __be16 dport, __be16 cport); | |
85999283 | 739 | }; |
1da177e4 | 740 | |
07dcc686 | 741 | /* The application module object (a.k.a. app incarnation) */ |
fd2c3ef7 | 742 | struct ip_vs_app { |
1da177e4 LT |
743 | struct list_head a_list; /* member in app list */ |
744 | int type; /* IP_VS_APP_TYPE_xxx */ | |
745 | char *name; /* application module name */ | |
746 | __u16 protocol; | |
747 | struct module *module; /* THIS_MODULE/NULL */ | |
748 | struct list_head incs_list; /* list of incarnations */ | |
749 | ||
750 | /* members for application incarnations */ | |
751 | struct list_head p_list; /* member in proto app list */ | |
752 | struct ip_vs_app *app; /* its real application */ | |
014d730d | 753 | __be16 port; /* port number in net order */ |
1da177e4 | 754 | atomic_t usecnt; /* usage counter */ |
363c97d7 | 755 | struct rcu_head rcu_head; |
1da177e4 | 756 | |
07dcc686 | 757 | /* output hook: Process packet in inout direction, diff set for TCP. |
8b27b10f JA |
758 | * Return: 0=Error, 1=Payload Not Mangled/Mangled but checksum is ok, |
759 | * 2=Mangled but checksum was not updated | |
760 | */ | |
1da177e4 | 761 | int (*pkt_out)(struct ip_vs_app *, struct ip_vs_conn *, |
d12e1229 | 762 | struct sk_buff *, int *diff, struct ip_vs_iphdr *ipvsh); |
1da177e4 | 763 | |
07dcc686 | 764 | /* input hook: Process packet in outin direction, diff set for TCP. |
8b27b10f JA |
765 | * Return: 0=Error, 1=Payload Not Mangled/Mangled but checksum is ok, |
766 | * 2=Mangled but checksum was not updated | |
767 | */ | |
1da177e4 | 768 | int (*pkt_in)(struct ip_vs_app *, struct ip_vs_conn *, |
d12e1229 | 769 | struct sk_buff *, int *diff, struct ip_vs_iphdr *ipvsh); |
1da177e4 LT |
770 | |
771 | /* ip_vs_app initializer */ | |
772 | int (*init_conn)(struct ip_vs_app *, struct ip_vs_conn *); | |
773 | ||
774 | /* ip_vs_app finish */ | |
775 | int (*done_conn)(struct ip_vs_app *, struct ip_vs_conn *); | |
776 | ||
777 | ||
778 | /* not used now */ | |
779 | int (*bind_conn)(struct ip_vs_app *, struct ip_vs_conn *, | |
780 | struct ip_vs_protocol *); | |
781 | ||
782 | void (*unbind_conn)(struct ip_vs_app *, struct ip_vs_conn *); | |
783 | ||
784 | int * timeout_table; | |
785 | int * timeouts; | |
786 | int timeouts_size; | |
787 | ||
788 | int (*conn_schedule)(struct sk_buff *skb, struct ip_vs_app *app, | |
789 | int *verdict, struct ip_vs_conn **cpp); | |
790 | ||
791 | struct ip_vs_conn * | |
792 | (*conn_in_get)(const struct sk_buff *skb, struct ip_vs_app *app, | |
d4383f04 | 793 | const struct iphdr *iph, int inverse); |
1da177e4 LT |
794 | |
795 | struct ip_vs_conn * | |
796 | (*conn_out_get)(const struct sk_buff *skb, struct ip_vs_app *app, | |
d4383f04 | 797 | const struct iphdr *iph, int inverse); |
1da177e4 LT |
798 | |
799 | int (*state_transition)(struct ip_vs_conn *cp, int direction, | |
800 | const struct sk_buff *skb, | |
801 | struct ip_vs_app *app); | |
802 | ||
803 | void (*timeout_change)(struct ip_vs_app *app, int flags); | |
804 | }; | |
805 | ||
f73181c8 PNA |
806 | struct ipvs_master_sync_state { |
807 | struct list_head sync_queue; | |
808 | struct ip_vs_sync_buff *sync_buff; | |
07995674 | 809 | unsigned long sync_queue_len; |
f73181c8 PNA |
810 | unsigned int sync_queue_delay; |
811 | struct task_struct *master_thread; | |
812 | struct delayed_work master_wakeup_work; | |
813 | struct netns_ipvs *ipvs; | |
814 | }; | |
815 | ||
578bc3ef JA |
816 | /* How much time to keep dests in trash */ |
817 | #define IP_VS_DEST_TRASH_PERIOD (120 * HZ) | |
818 | ||
e4ff6751 | 819 | struct ipvs_sync_daemon_cfg { |
d3328817 | 820 | union nf_inet_addr mcast_group; |
e4ff6751 JA |
821 | int syncid; |
822 | u16 sync_maxlen; | |
d3328817 JA |
823 | u16 mcast_port; |
824 | u8 mcast_af; | |
825 | u8 mcast_ttl; | |
e4ff6751 JA |
826 | /* multicast interface name */ |
827 | char mcast_ifn[IP_VS_IFNAME_MAXLEN]; | |
828 | }; | |
829 | ||
2553d064 JA |
830 | /* IPVS in network namespace */ |
831 | struct netns_ipvs { | |
832 | int gen; /* Generation */ | |
7a4f0761 | 833 | int enable; /* enable like nf_hooks do */ |
07dcc686 | 834 | /* Hash table: for real service lookups */ |
2553d064 JA |
835 | #define IP_VS_RTAB_BITS 4 |
836 | #define IP_VS_RTAB_SIZE (1 << IP_VS_RTAB_BITS) | |
837 | #define IP_VS_RTAB_MASK (IP_VS_RTAB_SIZE - 1) | |
838 | ||
276472ea | 839 | struct hlist_head rs_table[IP_VS_RTAB_SIZE]; |
2553d064 JA |
840 | /* ip_vs_app */ |
841 | struct list_head app_list; | |
2553d064 JA |
842 | /* ip_vs_proto */ |
843 | #define IP_VS_PROTO_TAB_SIZE 32 /* must be power of 2 */ | |
844 | struct ip_vs_proto_data *proto_data_table[IP_VS_PROTO_TAB_SIZE]; | |
845 | /* ip_vs_proto_tcp */ | |
846 | #ifdef CONFIG_IP_VS_PROTO_TCP | |
847 | #define TCP_APP_TAB_BITS 4 | |
848 | #define TCP_APP_TAB_SIZE (1 << TCP_APP_TAB_BITS) | |
849 | #define TCP_APP_TAB_MASK (TCP_APP_TAB_SIZE - 1) | |
850 | struct list_head tcp_apps[TCP_APP_TAB_SIZE]; | |
2553d064 JA |
851 | #endif |
852 | /* ip_vs_proto_udp */ | |
853 | #ifdef CONFIG_IP_VS_PROTO_UDP | |
854 | #define UDP_APP_TAB_BITS 4 | |
855 | #define UDP_APP_TAB_SIZE (1 << UDP_APP_TAB_BITS) | |
856 | #define UDP_APP_TAB_MASK (UDP_APP_TAB_SIZE - 1) | |
857 | struct list_head udp_apps[UDP_APP_TAB_SIZE]; | |
2553d064 JA |
858 | #endif |
859 | /* ip_vs_proto_sctp */ | |
860 | #ifdef CONFIG_IP_VS_PROTO_SCTP | |
861 | #define SCTP_APP_TAB_BITS 4 | |
862 | #define SCTP_APP_TAB_SIZE (1 << SCTP_APP_TAB_BITS) | |
863 | #define SCTP_APP_TAB_MASK (SCTP_APP_TAB_SIZE - 1) | |
864 | /* Hash table for SCTP application incarnations */ | |
865 | struct list_head sctp_apps[SCTP_APP_TAB_SIZE]; | |
2553d064 JA |
866 | #endif |
867 | /* ip_vs_conn */ | |
07dcc686 | 868 | atomic_t conn_count; /* connection counter */ |
2553d064 JA |
869 | |
870 | /* ip_vs_ctl */ | |
2a0751af | 871 | struct ip_vs_stats tot_stats; /* Statistics & est. */ |
2553d064 JA |
872 | |
873 | int num_services; /* no of virtual services */ | |
f2247fbd | 874 | |
f2247fbd SH |
875 | /* Trash for destinations */ |
876 | struct list_head dest_trash; | |
578bc3ef JA |
877 | spinlock_t dest_trash_lock; |
878 | struct timer_list dest_trash_timer; /* expiration timer */ | |
f2247fbd SH |
879 | /* Service counters */ |
880 | atomic_t ftpsvc_counter; | |
881 | atomic_t nullsvc_counter; | |
39b97223 | 882 | atomic_t conn_out_counter; |
f2247fbd SH |
883 | |
884 | #ifdef CONFIG_SYSCTL | |
2553d064 JA |
885 | /* 1/rate drop and drop-entry variables */ |
886 | struct delayed_work defense_work; /* Work handler */ | |
887 | int drop_rate; | |
888 | int drop_counter; | |
889 | atomic_t dropentry; | |
890 | /* locks in ctl.c */ | |
891 | spinlock_t dropentry_lock; /* drop entry handling */ | |
892 | spinlock_t droppacket_lock; /* drop packet handling */ | |
893 | spinlock_t securetcp_lock; /* state and timeout tables */ | |
2553d064 JA |
894 | |
895 | /* sys-ctl struct */ | |
896 | struct ctl_table_header *sysctl_hdr; | |
897 | struct ctl_table *sysctl_tbl; | |
f2247fbd SH |
898 | #endif |
899 | ||
2553d064 JA |
900 | /* sysctl variables */ |
901 | int sysctl_amemthresh; | |
902 | int sysctl_am_droprate; | |
903 | int sysctl_drop_entry; | |
904 | int sysctl_drop_packet; | |
905 | int sysctl_secure_tcp; | |
906 | #ifdef CONFIG_IP_VS_NFCT | |
907 | int sysctl_conntrack; | |
908 | #endif | |
909 | int sysctl_snat_reroute; | |
910 | int sysctl_sync_ver; | |
f73181c8 | 911 | int sysctl_sync_ports; |
4d0c875d | 912 | int sysctl_sync_persist_mode; |
07995674 | 913 | unsigned long sysctl_sync_qlen_max; |
1c003b15 | 914 | int sysctl_sync_sock_size; |
2553d064 JA |
915 | int sysctl_cache_bypass; |
916 | int sysctl_expire_nodest_conn; | |
c6c96c18 AF |
917 | int sysctl_sloppy_tcp; |
918 | int sysctl_sloppy_sctp; | |
2553d064 JA |
919 | int sysctl_expire_quiescent_template; |
920 | int sysctl_sync_threshold[2]; | |
749c42b6 JA |
921 | unsigned int sysctl_sync_refresh_period; |
922 | int sysctl_sync_retries; | |
2553d064 | 923 | int sysctl_nat_icmp_send; |
3654e611 | 924 | int sysctl_pmtu_disc; |
0c12582f | 925 | int sysctl_backup_only; |
d752c364 | 926 | int sysctl_conn_reuse_mode; |
94485fed | 927 | int sysctl_schedule_icmp; |
4e478098 | 928 | int sysctl_ignore_tunneled; |
2553d064 JA |
929 | |
930 | /* ip_vs_lblc */ | |
931 | int sysctl_lblc_expiration; | |
932 | struct ctl_table_header *lblc_ctl_header; | |
933 | struct ctl_table *lblc_ctl_table; | |
934 | /* ip_vs_lblcr */ | |
935 | int sysctl_lblcr_expiration; | |
936 | struct ctl_table_header *lblcr_ctl_header; | |
937 | struct ctl_table *lblcr_ctl_table; | |
938 | /* ip_vs_est */ | |
939 | struct list_head est_list; /* estimator list */ | |
940 | spinlock_t est_lock; | |
941 | struct timer_list est_timer; /* Estimation timer */ | |
942 | /* ip_vs_sync */ | |
2553d064 | 943 | spinlock_t sync_lock; |
f73181c8 | 944 | struct ipvs_master_sync_state *ms; |
2553d064 | 945 | spinlock_t sync_buff_lock; |
f73181c8 PNA |
946 | struct task_struct **backup_threads; |
947 | int threads_mask; | |
2553d064 | 948 | volatile int sync_state; |
ae1d48b2 | 949 | struct mutex sync_mutex; |
e4ff6751 JA |
950 | struct ipvs_sync_daemon_cfg mcfg; /* Master Configuration */ |
951 | struct ipvs_sync_daemon_cfg bcfg; /* Backup Configuration */ | |
2553d064 JA |
952 | /* net name space ptr */ |
953 | struct net *net; /* Needed by timer routines */ | |
07dcc686 SH |
954 | /* Number of heterogeneous destinations, needed becaus heterogeneous |
955 | * are not supported when synchronization is enabled. | |
956 | */ | |
391f503d | 957 | unsigned int mixed_address_family_dests; |
2553d064 | 958 | }; |
1da177e4 | 959 | |
59e0350e SH |
960 | #define DEFAULT_SYNC_THRESHOLD 3 |
961 | #define DEFAULT_SYNC_PERIOD 50 | |
7532e8d4 | 962 | #define DEFAULT_SYNC_VER 1 |
c6c96c18 AF |
963 | #define DEFAULT_SLOPPY_TCP 0 |
964 | #define DEFAULT_SLOPPY_SCTP 0 | |
749c42b6 JA |
965 | #define DEFAULT_SYNC_REFRESH_PERIOD (0U * HZ) |
966 | #define DEFAULT_SYNC_RETRIES 0 | |
1c003b15 PNA |
967 | #define IPVS_SYNC_WAKEUP_RATE 8 |
968 | #define IPVS_SYNC_QLEN_MAX (IPVS_SYNC_WAKEUP_RATE * 4) | |
969 | #define IPVS_SYNC_SEND_DELAY (HZ / 50) | |
970 | #define IPVS_SYNC_CHECK_PERIOD HZ | |
749c42b6 | 971 | #define IPVS_SYNC_FLUSH_TIME (HZ * 2) |
f73181c8 | 972 | #define IPVS_SYNC_PORTS_MAX (1 << 6) |
59e0350e SH |
973 | |
974 | #ifdef CONFIG_SYSCTL | |
975 | ||
976 | static inline int sysctl_sync_threshold(struct netns_ipvs *ipvs) | |
977 | { | |
978 | return ipvs->sysctl_sync_threshold[0]; | |
979 | } | |
980 | ||
981 | static inline int sysctl_sync_period(struct netns_ipvs *ipvs) | |
982 | { | |
6aa7de05 | 983 | return READ_ONCE(ipvs->sysctl_sync_threshold[1]); |
749c42b6 JA |
984 | } |
985 | ||
986 | static inline unsigned int sysctl_sync_refresh_period(struct netns_ipvs *ipvs) | |
987 | { | |
6aa7de05 | 988 | return READ_ONCE(ipvs->sysctl_sync_refresh_period); |
749c42b6 JA |
989 | } |
990 | ||
991 | static inline int sysctl_sync_retries(struct netns_ipvs *ipvs) | |
992 | { | |
993 | return ipvs->sysctl_sync_retries; | |
59e0350e SH |
994 | } |
995 | ||
7532e8d4 SH |
996 | static inline int sysctl_sync_ver(struct netns_ipvs *ipvs) |
997 | { | |
998 | return ipvs->sysctl_sync_ver; | |
999 | } | |
1000 | ||
c6c96c18 AF |
1001 | static inline int sysctl_sloppy_tcp(struct netns_ipvs *ipvs) |
1002 | { | |
1003 | return ipvs->sysctl_sloppy_tcp; | |
1004 | } | |
1005 | ||
1006 | static inline int sysctl_sloppy_sctp(struct netns_ipvs *ipvs) | |
1007 | { | |
1008 | return ipvs->sysctl_sloppy_sctp; | |
1009 | } | |
1010 | ||
f73181c8 PNA |
1011 | static inline int sysctl_sync_ports(struct netns_ipvs *ipvs) |
1012 | { | |
6aa7de05 | 1013 | return READ_ONCE(ipvs->sysctl_sync_ports); |
f73181c8 PNA |
1014 | } |
1015 | ||
4d0c875d JA |
1016 | static inline int sysctl_sync_persist_mode(struct netns_ipvs *ipvs) |
1017 | { | |
1018 | return ipvs->sysctl_sync_persist_mode; | |
1019 | } | |
1020 | ||
07995674 | 1021 | static inline unsigned long sysctl_sync_qlen_max(struct netns_ipvs *ipvs) |
1c003b15 PNA |
1022 | { |
1023 | return ipvs->sysctl_sync_qlen_max; | |
1024 | } | |
1025 | ||
1026 | static inline int sysctl_sync_sock_size(struct netns_ipvs *ipvs) | |
1027 | { | |
1028 | return ipvs->sysctl_sync_sock_size; | |
1029 | } | |
1030 | ||
3654e611 JA |
1031 | static inline int sysctl_pmtu_disc(struct netns_ipvs *ipvs) |
1032 | { | |
1033 | return ipvs->sysctl_pmtu_disc; | |
1034 | } | |
1035 | ||
0c12582f JA |
1036 | static inline int sysctl_backup_only(struct netns_ipvs *ipvs) |
1037 | { | |
1038 | return ipvs->sync_state & IP_VS_STATE_BACKUP && | |
1039 | ipvs->sysctl_backup_only; | |
1040 | } | |
1041 | ||
d752c364 MRL |
1042 | static inline int sysctl_conn_reuse_mode(struct netns_ipvs *ipvs) |
1043 | { | |
1044 | return ipvs->sysctl_conn_reuse_mode; | |
1045 | } | |
1046 | ||
94485fed AG |
1047 | static inline int sysctl_schedule_icmp(struct netns_ipvs *ipvs) |
1048 | { | |
1049 | return ipvs->sysctl_schedule_icmp; | |
1050 | } | |
1051 | ||
4e478098 AG |
1052 | static inline int sysctl_ignore_tunneled(struct netns_ipvs *ipvs) |
1053 | { | |
1054 | return ipvs->sysctl_ignore_tunneled; | |
1055 | } | |
1056 | ||
57032948 EB |
1057 | static inline int sysctl_cache_bypass(struct netns_ipvs *ipvs) |
1058 | { | |
1059 | return ipvs->sysctl_cache_bypass; | |
1060 | } | |
1061 | ||
59e0350e SH |
1062 | #else |
1063 | ||
1064 | static inline int sysctl_sync_threshold(struct netns_ipvs *ipvs) | |
1065 | { | |
1066 | return DEFAULT_SYNC_THRESHOLD; | |
1067 | } | |
1068 | ||
1069 | static inline int sysctl_sync_period(struct netns_ipvs *ipvs) | |
1070 | { | |
1071 | return DEFAULT_SYNC_PERIOD; | |
1072 | } | |
1073 | ||
749c42b6 JA |
1074 | static inline unsigned int sysctl_sync_refresh_period(struct netns_ipvs *ipvs) |
1075 | { | |
1076 | return DEFAULT_SYNC_REFRESH_PERIOD; | |
1077 | } | |
1078 | ||
1079 | static inline int sysctl_sync_retries(struct netns_ipvs *ipvs) | |
1080 | { | |
1081 | return DEFAULT_SYNC_RETRIES & 3; | |
1082 | } | |
1083 | ||
7532e8d4 SH |
1084 | static inline int sysctl_sync_ver(struct netns_ipvs *ipvs) |
1085 | { | |
1086 | return DEFAULT_SYNC_VER; | |
1087 | } | |
1088 | ||
c6c96c18 AF |
1089 | static inline int sysctl_sloppy_tcp(struct netns_ipvs *ipvs) |
1090 | { | |
1091 | return DEFAULT_SLOPPY_TCP; | |
1092 | } | |
1093 | ||
1094 | static inline int sysctl_sloppy_sctp(struct netns_ipvs *ipvs) | |
1095 | { | |
1096 | return DEFAULT_SLOPPY_SCTP; | |
1097 | } | |
1098 | ||
f73181c8 PNA |
1099 | static inline int sysctl_sync_ports(struct netns_ipvs *ipvs) |
1100 | { | |
1101 | return 1; | |
1102 | } | |
1103 | ||
4d0c875d JA |
1104 | static inline int sysctl_sync_persist_mode(struct netns_ipvs *ipvs) |
1105 | { | |
1106 | return 0; | |
1107 | } | |
1108 | ||
07995674 | 1109 | static inline unsigned long sysctl_sync_qlen_max(struct netns_ipvs *ipvs) |
1c003b15 PNA |
1110 | { |
1111 | return IPVS_SYNC_QLEN_MAX; | |
1112 | } | |
1113 | ||
1114 | static inline int sysctl_sync_sock_size(struct netns_ipvs *ipvs) | |
1115 | { | |
1116 | return 0; | |
1117 | } | |
1118 | ||
3654e611 JA |
1119 | static inline int sysctl_pmtu_disc(struct netns_ipvs *ipvs) |
1120 | { | |
1121 | return 1; | |
1122 | } | |
1123 | ||
0c12582f JA |
1124 | static inline int sysctl_backup_only(struct netns_ipvs *ipvs) |
1125 | { | |
1126 | return 0; | |
1127 | } | |
1128 | ||
d752c364 MRL |
1129 | static inline int sysctl_conn_reuse_mode(struct netns_ipvs *ipvs) |
1130 | { | |
1131 | return 1; | |
1132 | } | |
1133 | ||
94485fed AG |
1134 | static inline int sysctl_schedule_icmp(struct netns_ipvs *ipvs) |
1135 | { | |
1136 | return 0; | |
1137 | } | |
1138 | ||
4e478098 AG |
1139 | static inline int sysctl_ignore_tunneled(struct netns_ipvs *ipvs) |
1140 | { | |
1141 | return 0; | |
1142 | } | |
1143 | ||
57032948 EB |
1144 | static inline int sysctl_cache_bypass(struct netns_ipvs *ipvs) |
1145 | { | |
1146 | return 0; | |
1147 | } | |
1148 | ||
59e0350e SH |
1149 | #endif |
1150 | ||
07dcc686 SH |
1151 | /* IPVS core functions |
1152 | * (from ip_vs_core.c) | |
1da177e4 | 1153 | */ |
5c3a0fd7 JP |
1154 | const char *ip_vs_proto_name(unsigned int proto); |
1155 | void ip_vs_init_hash_table(struct list_head *table, int rows); | |
39b97223 MA |
1156 | struct ip_vs_conn *ip_vs_new_conn_out(struct ip_vs_service *svc, |
1157 | struct ip_vs_dest *dest, | |
1158 | struct sk_buff *skb, | |
1159 | const struct ip_vs_iphdr *iph, | |
1160 | __be16 dport, | |
1161 | __be16 cport); | |
afdd6140 | 1162 | #define IP_VS_INIT_HASH_TABLE(t) ip_vs_init_hash_table((t), ARRAY_SIZE((t))) |
1da177e4 | 1163 | |
1da177e4 LT |
1164 | #define IP_VS_APP_TYPE_FTP 1 |
1165 | ||
07dcc686 SH |
1166 | /* ip_vs_conn handling functions |
1167 | * (from ip_vs_conn.c) | |
1da177e4 | 1168 | */ |
1da177e4 LT |
1169 | enum { |
1170 | IP_VS_DIR_INPUT = 0, | |
1171 | IP_VS_DIR_OUTPUT, | |
1172 | IP_VS_DIR_INPUT_ONLY, | |
1173 | IP_VS_DIR_LAST, | |
1174 | }; | |
1175 | ||
19913dec | 1176 | static inline void ip_vs_conn_fill_param(struct netns_ipvs *ipvs, int af, int protocol, |
f11017ec SH |
1177 | const union nf_inet_addr *caddr, |
1178 | __be16 cport, | |
1179 | const union nf_inet_addr *vaddr, | |
1180 | __be16 vport, | |
1181 | struct ip_vs_conn_param *p) | |
1182 | { | |
19913dec | 1183 | p->ipvs = ipvs; |
f11017ec SH |
1184 | p->af = af; |
1185 | p->protocol = protocol; | |
1186 | p->caddr = caddr; | |
1187 | p->cport = cport; | |
1188 | p->vaddr = vaddr; | |
1189 | p->vport = vport; | |
85999283 SH |
1190 | p->pe = NULL; |
1191 | p->pe_data = NULL; | |
f11017ec | 1192 | } |
28364a59 | 1193 | |
f11017ec SH |
1194 | struct ip_vs_conn *ip_vs_conn_in_get(const struct ip_vs_conn_param *p); |
1195 | struct ip_vs_conn *ip_vs_ct_in_get(const struct ip_vs_conn_param *p); | |
28364a59 | 1196 | |
ab161976 EB |
1197 | struct ip_vs_conn * ip_vs_conn_in_get_proto(struct netns_ipvs *ipvs, int af, |
1198 | const struct sk_buff *skb, | |
802c41ad | 1199 | const struct ip_vs_iphdr *iph); |
5c0d2374 | 1200 | |
f11017ec | 1201 | struct ip_vs_conn *ip_vs_conn_out_get(const struct ip_vs_conn_param *p); |
1da177e4 | 1202 | |
0cf705c8 EB |
1203 | struct ip_vs_conn * ip_vs_conn_out_get_proto(struct netns_ipvs *ipvs, int af, |
1204 | const struct sk_buff *skb, | |
802c41ad | 1205 | const struct ip_vs_iphdr *iph); |
5c0d2374 | 1206 | |
088339a5 JA |
1207 | /* Get reference to gain full access to conn. |
1208 | * By default, RCU read-side critical sections have access only to | |
1209 | * conn fields and its PE data, see ip_vs_conn_rcu_free() for reference. | |
1210 | */ | |
1211 | static inline bool __ip_vs_conn_get(struct ip_vs_conn *cp) | |
1212 | { | |
b54ab92b | 1213 | return refcount_inc_not_zero(&cp->refcnt); |
088339a5 JA |
1214 | } |
1215 | ||
1da177e4 LT |
1216 | /* put back the conn without restarting its timer */ |
1217 | static inline void __ip_vs_conn_put(struct ip_vs_conn *cp) | |
1218 | { | |
4e857c58 | 1219 | smp_mb__before_atomic(); |
b54ab92b | 1220 | refcount_dec(&cp->refcnt); |
1da177e4 | 1221 | } |
5c3a0fd7 JP |
1222 | void ip_vs_conn_put(struct ip_vs_conn *cp); |
1223 | void ip_vs_conn_fill_cport(struct ip_vs_conn *cp, __be16 cport); | |
1da177e4 | 1224 | |
ba38528a | 1225 | struct ip_vs_conn *ip_vs_conn_new(const struct ip_vs_conn_param *p, int dest_af, |
f11017ec | 1226 | const union nf_inet_addr *daddr, |
95c96174 | 1227 | __be16 dport, unsigned int flags, |
0e051e68 | 1228 | struct ip_vs_dest *dest, __u32 fwmark); |
5c3a0fd7 | 1229 | void ip_vs_conn_expire_now(struct ip_vs_conn *cp); |
1da177e4 | 1230 | |
ec1b28ca | 1231 | const char *ip_vs_state_name(const struct ip_vs_conn *cp); |
1da177e4 | 1232 | |
69f39093 | 1233 | void ip_vs_tcp_conn_listen(struct ip_vs_conn *cp); |
3ec10d3a | 1234 | int ip_vs_check_template(struct ip_vs_conn *ct, struct ip_vs_dest *cdest); |
423b5595 | 1235 | void ip_vs_random_dropentry(struct netns_ipvs *ipvs); |
5c3a0fd7 JP |
1236 | int ip_vs_conn_init(void); |
1237 | void ip_vs_conn_cleanup(void); | |
1da177e4 LT |
1238 | |
1239 | static inline void ip_vs_control_del(struct ip_vs_conn *cp) | |
1240 | { | |
1241 | struct ip_vs_conn *ctl_cp = cp->control; | |
1242 | if (!ctl_cp) { | |
cfc78c5a JV |
1243 | IP_VS_ERR_BUF("request control DEL for uncontrolled: " |
1244 | "%s:%d to %s:%d\n", | |
1245 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1246 | ntohs(cp->cport), | |
1247 | IP_VS_DBG_ADDR(cp->af, &cp->vaddr), | |
1248 | ntohs(cp->vport)); | |
1249 | ||
1da177e4 LT |
1250 | return; |
1251 | } | |
1252 | ||
cfc78c5a JV |
1253 | IP_VS_DBG_BUF(7, "DELeting control for: " |
1254 | "cp.dst=%s:%d ctl_cp.dst=%s:%d\n", | |
1255 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1256 | ntohs(cp->cport), | |
1257 | IP_VS_DBG_ADDR(cp->af, &ctl_cp->caddr), | |
1258 | ntohs(ctl_cp->cport)); | |
1da177e4 LT |
1259 | |
1260 | cp->control = NULL; | |
1261 | if (atomic_read(&ctl_cp->n_control) == 0) { | |
cfc78c5a JV |
1262 | IP_VS_ERR_BUF("BUG control DEL with n=0 : " |
1263 | "%s:%d to %s:%d\n", | |
1264 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1265 | ntohs(cp->cport), | |
1266 | IP_VS_DBG_ADDR(cp->af, &cp->vaddr), | |
1267 | ntohs(cp->vport)); | |
1268 | ||
1da177e4 LT |
1269 | return; |
1270 | } | |
1271 | atomic_dec(&ctl_cp->n_control); | |
1272 | } | |
1273 | ||
1274 | static inline void | |
1275 | ip_vs_control_add(struct ip_vs_conn *cp, struct ip_vs_conn *ctl_cp) | |
1276 | { | |
1277 | if (cp->control) { | |
cfc78c5a JV |
1278 | IP_VS_ERR_BUF("request control ADD for already controlled: " |
1279 | "%s:%d to %s:%d\n", | |
1280 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1281 | ntohs(cp->cport), | |
1282 | IP_VS_DBG_ADDR(cp->af, &cp->vaddr), | |
1283 | ntohs(cp->vport)); | |
1284 | ||
1da177e4 LT |
1285 | ip_vs_control_del(cp); |
1286 | } | |
1287 | ||
cfc78c5a JV |
1288 | IP_VS_DBG_BUF(7, "ADDing control for: " |
1289 | "cp.dst=%s:%d ctl_cp.dst=%s:%d\n", | |
1290 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1291 | ntohs(cp->cport), | |
1292 | IP_VS_DBG_ADDR(cp->af, &ctl_cp->caddr), | |
1293 | ntohs(ctl_cp->cport)); | |
1da177e4 LT |
1294 | |
1295 | cp->control = ctl_cp; | |
1296 | atomic_inc(&ctl_cp->n_control); | |
1297 | } | |
1298 | ||
27541143 JA |
1299 | /* Mark our template as assured */ |
1300 | static inline void | |
1301 | ip_vs_control_assure_ct(struct ip_vs_conn *cp) | |
1302 | { | |
1303 | struct ip_vs_conn *ct = cp->control; | |
1304 | ||
1305 | if (ct && !(ct->state & IP_VS_CTPL_S_ASSURED) && | |
1306 | (ct->flags & IP_VS_CONN_F_TEMPLATE)) | |
1307 | ct->state |= IP_VS_CTPL_S_ASSURED; | |
1308 | } | |
1309 | ||
07dcc686 | 1310 | /* IPVS netns init & cleanup functions */ |
a4dd0360 | 1311 | int ip_vs_estimator_net_init(struct netns_ipvs *ipvs); |
3d993766 | 1312 | int ip_vs_control_net_init(struct netns_ipvs *ipvs); |
7d1f88ec | 1313 | int ip_vs_protocol_net_init(struct netns_ipvs *ipvs); |
b5dd212c | 1314 | int ip_vs_app_net_init(struct netns_ipvs *ipvs); |
2f3edc6a | 1315 | int ip_vs_conn_net_init(struct netns_ipvs *ipvs); |
802cb437 | 1316 | int ip_vs_sync_net_init(struct netns_ipvs *ipvs); |
2f3edc6a | 1317 | void ip_vs_conn_net_cleanup(struct netns_ipvs *ipvs); |
b5dd212c | 1318 | void ip_vs_app_net_cleanup(struct netns_ipvs *ipvs); |
7d1f88ec | 1319 | void ip_vs_protocol_net_cleanup(struct netns_ipvs *ipvs); |
3d993766 | 1320 | void ip_vs_control_net_cleanup(struct netns_ipvs *ipvs); |
a4dd0360 | 1321 | void ip_vs_estimator_net_cleanup(struct netns_ipvs *ipvs); |
ebea1f7c | 1322 | void ip_vs_sync_net_cleanup(struct netns_ipvs *ipvs); |
56d2169b | 1323 | void ip_vs_service_net_cleanup(struct netns_ipvs *ipvs); |
1da177e4 | 1324 | |
07dcc686 SH |
1325 | /* IPVS application functions |
1326 | * (from ip_vs_app.c) | |
1da177e4 LT |
1327 | */ |
1328 | #define IP_VS_APP_MAX_PORTS 8 | |
9f8128a5 EB |
1329 | struct ip_vs_app *register_ip_vs_app(struct netns_ipvs *ipvs, struct ip_vs_app *app); |
1330 | void unregister_ip_vs_app(struct netns_ipvs *ipvs, struct ip_vs_app *app); | |
5c3a0fd7 JP |
1331 | int ip_vs_bind_app(struct ip_vs_conn *cp, struct ip_vs_protocol *pp); |
1332 | void ip_vs_unbind_app(struct ip_vs_conn *cp); | |
3250dc9c | 1333 | int register_ip_vs_app_inc(struct netns_ipvs *ipvs, struct ip_vs_app *app, __u16 proto, |
5c3a0fd7 JP |
1334 | __u16 port); |
1335 | int ip_vs_app_inc_get(struct ip_vs_app *inc); | |
1336 | void ip_vs_app_inc_put(struct ip_vs_app *inc); | |
1337 | ||
d12e1229 JA |
1338 | int ip_vs_app_pkt_out(struct ip_vs_conn *, struct sk_buff *skb, |
1339 | struct ip_vs_iphdr *ipvsh); | |
1340 | int ip_vs_app_pkt_in(struct ip_vs_conn *, struct sk_buff *skb, | |
1341 | struct ip_vs_iphdr *ipvsh); | |
1da177e4 | 1342 | |
8be67a66 SH |
1343 | int register_ip_vs_pe(struct ip_vs_pe *pe); |
1344 | int unregister_ip_vs_pe(struct ip_vs_pe *pe); | |
e9e5eee8 | 1345 | struct ip_vs_pe *ip_vs_pe_getbyname(const char *name); |
fe5e7a1e | 1346 | struct ip_vs_pe *__ip_vs_pe_getbyname(const char *pe_name); |
e9e5eee8 | 1347 | |
07dcc686 | 1348 | /* Use a #define to avoid all of module.h just for these trivial ops */ |
69e7dae4 PG |
1349 | #define ip_vs_pe_get(pe) \ |
1350 | if (pe && pe->module) \ | |
e9e5eee8 | 1351 | __module_get(pe->module); |
e9e5eee8 | 1352 | |
69e7dae4 PG |
1353 | #define ip_vs_pe_put(pe) \ |
1354 | if (pe && pe->module) \ | |
e9e5eee8 | 1355 | module_put(pe->module); |
1da177e4 | 1356 | |
07dcc686 | 1357 | /* IPVS protocol functions (from ip_vs_proto.c) */ |
5c3a0fd7 JP |
1358 | int ip_vs_protocol_init(void); |
1359 | void ip_vs_protocol_cleanup(void); | |
1360 | void ip_vs_protocol_timeout_change(struct netns_ipvs *ipvs, int flags); | |
1361 | int *ip_vs_create_timeout_table(int *table, int size); | |
5c3a0fd7 JP |
1362 | void ip_vs_tcpudp_debug_packet(int af, struct ip_vs_protocol *pp, |
1363 | const struct sk_buff *skb, int offset, | |
1364 | const char *msg); | |
1da177e4 LT |
1365 | |
1366 | extern struct ip_vs_protocol ip_vs_protocol_tcp; | |
1367 | extern struct ip_vs_protocol ip_vs_protocol_udp; | |
1368 | extern struct ip_vs_protocol ip_vs_protocol_icmp; | |
1369 | extern struct ip_vs_protocol ip_vs_protocol_esp; | |
1370 | extern struct ip_vs_protocol ip_vs_protocol_ah; | |
2906f66a | 1371 | extern struct ip_vs_protocol ip_vs_protocol_sctp; |
1da177e4 | 1372 | |
07dcc686 SH |
1373 | /* Registering/unregistering scheduler functions |
1374 | * (from ip_vs_sched.c) | |
1da177e4 | 1375 | */ |
5c3a0fd7 JP |
1376 | int register_ip_vs_scheduler(struct ip_vs_scheduler *scheduler); |
1377 | int unregister_ip_vs_scheduler(struct ip_vs_scheduler *scheduler); | |
1378 | int ip_vs_bind_scheduler(struct ip_vs_service *svc, | |
1379 | struct ip_vs_scheduler *scheduler); | |
1380 | void ip_vs_unbind_scheduler(struct ip_vs_service *svc, | |
1381 | struct ip_vs_scheduler *sched); | |
1382 | struct ip_vs_scheduler *ip_vs_scheduler_get(const char *sched_name); | |
1383 | void ip_vs_scheduler_put(struct ip_vs_scheduler *scheduler); | |
1384 | struct ip_vs_conn * | |
190ecd27 | 1385 | ip_vs_schedule(struct ip_vs_service *svc, struct sk_buff *skb, |
d4383f04 JDB |
1386 | struct ip_vs_proto_data *pd, int *ignored, |
1387 | struct ip_vs_iphdr *iph); | |
5c3a0fd7 JP |
1388 | int ip_vs_leave(struct ip_vs_service *svc, struct sk_buff *skb, |
1389 | struct ip_vs_proto_data *pd, struct ip_vs_iphdr *iph); | |
1da177e4 | 1390 | |
5c3a0fd7 | 1391 | void ip_vs_scheduler_err(struct ip_vs_service *svc, const char *msg); |
41ac51ee | 1392 | |
07dcc686 | 1393 | /* IPVS control data and functions (from ip_vs_ctl.c) */ |
1da177e4 | 1394 | extern struct ip_vs_stats ip_vs_stats; |
b880c1f0 | 1395 | extern int sysctl_ip_vs_sync_ver; |
1da177e4 | 1396 | |
5c3a0fd7 | 1397 | struct ip_vs_service * |
0a4fd6ce | 1398 | ip_vs_service_find(struct netns_ipvs *ipvs, int af, __u32 fwmark, __u16 protocol, |
3c2e0505 | 1399 | const union nf_inet_addr *vaddr, __be16 vport); |
1da177e4 | 1400 | |
48aed1b0 | 1401 | bool ip_vs_has_real_service(struct netns_ipvs *ipvs, int af, __u16 protocol, |
5c3a0fd7 JP |
1402 | const union nf_inet_addr *daddr, __be16 dport); |
1403 | ||
39b97223 MA |
1404 | struct ip_vs_dest * |
1405 | ip_vs_find_real_service(struct netns_ipvs *ipvs, int af, __u16 protocol, | |
1406 | const union nf_inet_addr *daddr, __be16 dport); | |
1407 | ||
5c3a0fd7 JP |
1408 | int ip_vs_use_count_inc(void); |
1409 | void ip_vs_use_count_dec(void); | |
1410 | int ip_vs_register_nl_ioctl(void); | |
1411 | void ip_vs_unregister_nl_ioctl(void); | |
1412 | int ip_vs_control_init(void); | |
1413 | void ip_vs_control_cleanup(void); | |
1414 | struct ip_vs_dest * | |
dc2add6f | 1415 | ip_vs_find_dest(struct netns_ipvs *ipvs, int svc_af, int dest_af, |
655eef10 AG |
1416 | const union nf_inet_addr *daddr, __be16 dport, |
1417 | const union nf_inet_addr *vaddr, __be16 vport, | |
52793dbe | 1418 | __u16 protocol, __u32 fwmark, __u32 flags); |
5c3a0fd7 | 1419 | void ip_vs_try_bind_dest(struct ip_vs_conn *cp); |
1da177e4 | 1420 | |
fca9c20a JA |
1421 | static inline void ip_vs_dest_hold(struct ip_vs_dest *dest) |
1422 | { | |
b54ab92b | 1423 | refcount_inc(&dest->refcnt); |
fca9c20a JA |
1424 | } |
1425 | ||
1426 | static inline void ip_vs_dest_put(struct ip_vs_dest *dest) | |
1427 | { | |
4e857c58 | 1428 | smp_mb__before_atomic(); |
b54ab92b | 1429 | refcount_dec(&dest->refcnt); |
fca9c20a | 1430 | } |
1da177e4 | 1431 | |
9e4e948a JA |
1432 | static inline void ip_vs_dest_put_and_free(struct ip_vs_dest *dest) |
1433 | { | |
b54ab92b | 1434 | if (refcount_dec_and_test(&dest->refcnt)) |
9e4e948a JA |
1435 | kfree(dest); |
1436 | } | |
1437 | ||
07dcc686 SH |
1438 | /* IPVS sync daemon data and function prototypes |
1439 | * (from ip_vs_sync.c) | |
1da177e4 | 1440 | */ |
6ac121d7 | 1441 | int start_sync_thread(struct netns_ipvs *ipvs, struct ipvs_sync_daemon_cfg *cfg, |
e4ff6751 | 1442 | int state); |
b3cf3cbf | 1443 | int stop_sync_thread(struct netns_ipvs *ipvs, int state); |
b61a8c1a | 1444 | void ip_vs_sync_conn(struct netns_ipvs *ipvs, struct ip_vs_conn *cp, int pkts); |
1da177e4 | 1445 | |
07dcc686 | 1446 | /* IPVS rate estimator prototypes (from ip_vs_est.c) */ |
0f34d54b EB |
1447 | void ip_vs_start_estimator(struct netns_ipvs *ipvs, struct ip_vs_stats *stats); |
1448 | void ip_vs_stop_estimator(struct netns_ipvs *ipvs, struct ip_vs_stats *stats); | |
5c3a0fd7 | 1449 | void ip_vs_zero_estimator(struct ip_vs_stats *stats); |
cd67cd5e | 1450 | void ip_vs_read_estimator(struct ip_vs_kstats *dst, struct ip_vs_stats *stats); |
1da177e4 | 1451 | |
07dcc686 | 1452 | /* Various IPVS packet transmitters (from ip_vs_xmit.c) */ |
5c3a0fd7 JP |
1453 | int ip_vs_null_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, |
1454 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1455 | int ip_vs_bypass_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1456 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1457 | int ip_vs_nat_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1458 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1459 | int ip_vs_tunnel_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1460 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1461 | int ip_vs_dr_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1462 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1463 | int ip_vs_icmp_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1464 | struct ip_vs_protocol *pp, int offset, | |
1465 | unsigned int hooknum, struct ip_vs_iphdr *iph); | |
1466 | void ip_vs_dest_dst_rcu_free(struct rcu_head *head); | |
1da177e4 | 1467 | |
b3cdd2a7 | 1468 | #ifdef CONFIG_IP_VS_IPV6 |
5c3a0fd7 JP |
1469 | int ip_vs_bypass_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, |
1470 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1471 | int ip_vs_nat_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1472 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1473 | int ip_vs_tunnel_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1474 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1475 | int ip_vs_dr_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1476 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1477 | int ip_vs_icmp_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1478 | struct ip_vs_protocol *pp, int offset, | |
1479 | unsigned int hooknum, struct ip_vs_iphdr *iph); | |
b3cdd2a7 | 1480 | #endif |
1da177e4 | 1481 | |
3a1bbf18 | 1482 | #ifdef CONFIG_SYSCTL |
07dcc686 SH |
1483 | /* This is a simple mechanism to ignore packets when |
1484 | * we are loaded. Just set ip_vs_drop_rate to 'n' and | |
1485 | * we start to drop 1/rate of the packets | |
1da177e4 | 1486 | */ |
a0840e2e | 1487 | static inline int ip_vs_todrop(struct netns_ipvs *ipvs) |
1da177e4 | 1488 | { |
a0840e2e HS |
1489 | if (!ipvs->drop_rate) |
1490 | return 0; | |
1491 | if (--ipvs->drop_counter > 0) | |
1492 | return 0; | |
1493 | ipvs->drop_counter = ipvs->drop_rate; | |
1da177e4 LT |
1494 | return 1; |
1495 | } | |
3a1bbf18 SH |
1496 | #else |
1497 | static inline int ip_vs_todrop(struct netns_ipvs *ipvs) { return 0; } | |
1498 | #endif | |
1da177e4 | 1499 | |
07dcc686 | 1500 | /* ip_vs_fwd_tag returns the forwarding tag of the connection */ |
1da177e4 LT |
1501 | #define IP_VS_FWD_METHOD(cp) (cp->flags & IP_VS_CONN_F_FWD_MASK) |
1502 | ||
732db659 | 1503 | static inline char ip_vs_fwd_tag(struct ip_vs_conn *cp) |
1da177e4 LT |
1504 | { |
1505 | char fwd; | |
1506 | ||
1507 | switch (IP_VS_FWD_METHOD(cp)) { | |
1508 | case IP_VS_CONN_F_MASQ: | |
1509 | fwd = 'M'; break; | |
1510 | case IP_VS_CONN_F_LOCALNODE: | |
1511 | fwd = 'L'; break; | |
1512 | case IP_VS_CONN_F_TUNNEL: | |
1513 | fwd = 'T'; break; | |
1514 | case IP_VS_CONN_F_DROUTE: | |
1515 | fwd = 'R'; break; | |
1516 | case IP_VS_CONN_F_BYPASS: | |
1517 | fwd = 'B'; break; | |
1518 | default: | |
1519 | fwd = '?'; break; | |
1520 | } | |
1521 | return fwd; | |
1522 | } | |
1523 | ||
5c3a0fd7 JP |
1524 | void ip_vs_nat_icmp(struct sk_buff *skb, struct ip_vs_protocol *pp, |
1525 | struct ip_vs_conn *cp, int dir); | |
b3cdd2a7 JV |
1526 | |
1527 | #ifdef CONFIG_IP_VS_IPV6 | |
5c3a0fd7 JP |
1528 | void ip_vs_nat_icmp_v6(struct sk_buff *skb, struct ip_vs_protocol *pp, |
1529 | struct ip_vs_conn *cp, int dir); | |
b3cdd2a7 | 1530 | #endif |
1da177e4 | 1531 | |
5c3a0fd7 | 1532 | __sum16 ip_vs_checksum_complete(struct sk_buff *skb, int offset); |
1da177e4 | 1533 | |
f9214b26 | 1534 | static inline __wsum ip_vs_check_diff4(__be32 old, __be32 new, __wsum oldsum) |
1da177e4 | 1535 | { |
f9214b26 | 1536 | __be32 diff[2] = { ~old, new }; |
1da177e4 | 1537 | |
07f0757a | 1538 | return csum_partial(diff, sizeof(diff), oldsum); |
f9214b26 AV |
1539 | } |
1540 | ||
0bbdd42b JV |
1541 | #ifdef CONFIG_IP_VS_IPV6 |
1542 | static inline __wsum ip_vs_check_diff16(const __be32 *old, const __be32 *new, | |
1543 | __wsum oldsum) | |
1544 | { | |
1545 | __be32 diff[8] = { ~old[3], ~old[2], ~old[1], ~old[0], | |
1546 | new[3], new[2], new[1], new[0] }; | |
1547 | ||
07f0757a | 1548 | return csum_partial(diff, sizeof(diff), oldsum); |
0bbdd42b JV |
1549 | } |
1550 | #endif | |
1551 | ||
f9214b26 AV |
1552 | static inline __wsum ip_vs_check_diff2(__be16 old, __be16 new, __wsum oldsum) |
1553 | { | |
1554 | __be16 diff[2] = { ~old, new }; | |
1555 | ||
07f0757a | 1556 | return csum_partial(diff, sizeof(diff), oldsum); |
1da177e4 LT |
1557 | } |
1558 | ||
07dcc686 | 1559 | /* Forget current conntrack (unconfirmed) and attach notrack entry */ |
cf356d69 JA |
1560 | static inline void ip_vs_notrack(struct sk_buff *skb) |
1561 | { | |
1562 | #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) | |
1563 | enum ip_conntrack_info ctinfo; | |
06b69390 | 1564 | struct nf_conn *ct = nf_ct_get(skb, &ctinfo); |
cf356d69 | 1565 | |
ab8bc7ed | 1566 | if (ct) { |
97a6ad13 | 1567 | nf_conntrack_put(&ct->ct_general); |
cc41c84b | 1568 | nf_ct_set(skb, NULL, IP_CT_UNTRACKED); |
cf356d69 JA |
1569 | } |
1570 | #endif | |
1571 | } | |
1572 | ||
f4bc17cd | 1573 | #ifdef CONFIG_IP_VS_NFCT |
07dcc686 SH |
1574 | /* Netfilter connection tracking |
1575 | * (from ip_vs_nfct.c) | |
f4bc17cd | 1576 | */ |
a0840e2e | 1577 | static inline int ip_vs_conntrack_enabled(struct netns_ipvs *ipvs) |
f4bc17cd | 1578 | { |
a4e2f5a7 | 1579 | #ifdef CONFIG_SYSCTL |
a0840e2e | 1580 | return ipvs->sysctl_conntrack; |
a4e2f5a7 SH |
1581 | #else |
1582 | return 0; | |
1583 | #endif | |
f4bc17cd JA |
1584 | } |
1585 | ||
5c3a0fd7 JP |
1586 | void ip_vs_update_conntrack(struct sk_buff *skb, struct ip_vs_conn *cp, |
1587 | int outin); | |
1588 | int ip_vs_confirm_conntrack(struct sk_buff *skb); | |
1589 | void ip_vs_nfct_expect_related(struct sk_buff *skb, struct nf_conn *ct, | |
1590 | struct ip_vs_conn *cp, u_int8_t proto, | |
1591 | const __be16 port, int from_rs); | |
1592 | void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp); | |
f4bc17cd JA |
1593 | |
1594 | #else | |
1595 | ||
a0840e2e | 1596 | static inline int ip_vs_conntrack_enabled(struct netns_ipvs *ipvs) |
f4bc17cd JA |
1597 | { |
1598 | return 0; | |
1599 | } | |
1600 | ||
1601 | static inline void ip_vs_update_conntrack(struct sk_buff *skb, | |
1602 | struct ip_vs_conn *cp, int outin) | |
1603 | { | |
1604 | } | |
1605 | ||
e23ebf0f | 1606 | static inline int ip_vs_confirm_conntrack(struct sk_buff *skb) |
f4bc17cd JA |
1607 | { |
1608 | return NF_ACCEPT; | |
1609 | } | |
1610 | ||
1611 | static inline void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp) | |
1612 | { | |
1613 | } | |
07dcc686 | 1614 | #endif /* CONFIG_IP_VS_NFCT */ |
6523ce15 | 1615 | |
f719e375 JA |
1616 | /* Really using conntrack? */ |
1617 | static inline bool ip_vs_conn_uses_conntrack(struct ip_vs_conn *cp, | |
1618 | struct sk_buff *skb) | |
1619 | { | |
1620 | #ifdef CONFIG_IP_VS_NFCT | |
1621 | enum ip_conntrack_info ctinfo; | |
1622 | struct nf_conn *ct; | |
1623 | ||
1624 | if (!(cp->flags & IP_VS_CONN_F_NFCT)) | |
1625 | return false; | |
1626 | ct = nf_ct_get(skb, &ctinfo); | |
ab8bc7ed | 1627 | if (ct) |
f719e375 JA |
1628 | return true; |
1629 | #endif | |
1630 | return false; | |
1631 | } | |
1632 | ||
31875d49 JA |
1633 | static inline int ip_vs_register_conntrack(struct ip_vs_service *svc) |
1634 | { | |
1635 | #if IS_ENABLED(CONFIG_NF_CONNTRACK) | |
1636 | int afmask = (svc->af == AF_INET6) ? 2 : 1; | |
1637 | int ret = 0; | |
1638 | ||
1639 | if (!(svc->conntrack_afmask & afmask)) { | |
1640 | ret = nf_ct_netns_get(svc->ipvs->net, svc->af); | |
1641 | if (ret >= 0) | |
1642 | svc->conntrack_afmask |= afmask; | |
1643 | } | |
1644 | return ret; | |
1645 | #else | |
1646 | return 0; | |
1647 | #endif | |
1648 | } | |
1649 | ||
1650 | static inline void ip_vs_unregister_conntrack(struct ip_vs_service *svc) | |
1651 | { | |
1652 | #if IS_ENABLED(CONFIG_NF_CONNTRACK) | |
1653 | int afmask = (svc->af == AF_INET6) ? 2 : 1; | |
1654 | ||
1655 | if (svc->conntrack_afmask & afmask) { | |
1656 | nf_ct_netns_put(svc->ipvs->net, svc->af); | |
1657 | svc->conntrack_afmask &= ~afmask; | |
1658 | } | |
1659 | #endif | |
1660 | } | |
1661 | ||
c16526a7 | 1662 | static inline int |
b552f7e3 CG |
1663 | ip_vs_dest_conn_overhead(struct ip_vs_dest *dest) |
1664 | { | |
07dcc686 | 1665 | /* We think the overhead of processing active connections is 256 |
b552f7e3 CG |
1666 | * times higher than that of inactive connections in average. (This |
1667 | * 256 times might not be accurate, we will change it later) We | |
1668 | * use the following formula to estimate the overhead now: | |
1669 | * dest->activeconns*256 + dest->inactconns | |
1670 | */ | |
1671 | return (atomic_read(&dest->activeconns) << 8) + | |
1672 | atomic_read(&dest->inactconns); | |
1673 | } | |
1674 | ||
bc4768eb | 1675 | #endif /* _NET_IP_VS_H */ |