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