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 | 16 | #include <linux/refcount.h> /* for struct refcount_t */ |
35dfb013 | 17 | #include <linux/workqueue.h> |
b54ab92b | 18 | |
1da177e4 | 19 | #include <linux/compiler.h> |
14c85021 | 20 | #include <linux/timer.h> |
187f1882 | 21 | #include <linux/bug.h> |
1da177e4 | 22 | |
14c85021 | 23 | #include <net/checksum.h> |
e7ade46a | 24 | #include <linux/netfilter.h> /* for union nf_inet_addr */ |
1668e010 | 25 | #include <linux/ip.h> |
e7ade46a | 26 | #include <linux/ipv6.h> /* for struct ipv6hdr */ |
4e3fd7a0 | 27 | #include <net/ipv6.h> |
a638e514 | 28 | #if IS_ENABLED(CONFIG_NF_CONNTRACK) |
f4bc17cd JA |
29 | #include <net/netfilter/nf_conntrack.h> |
30 | #endif | |
61b1ab45 HS |
31 | #include <net/net_namespace.h> /* Netw namespace */ |
32 | ||
4fd9beef AG |
33 | #define IP_VS_HDR_INVERSE 1 |
34 | #define IP_VS_HDR_ICMP 2 | |
35 | ||
07dcc686 | 36 | /* Generic access of ipvs struct */ |
61b1ab45 HS |
37 | static inline struct netns_ipvs *net_ipvs(struct net* net) |
38 | { | |
39 | return net->ipvs; | |
40 | } | |
07dcc686 | 41 | |
6f7edb48 CB |
42 | /* Connections' size value needed by ip_vs_ctl.c */ |
43 | extern int ip_vs_conn_tab_size; | |
44 | ||
64aae3cb | 45 | struct ip_vs_iphdr { |
4fd9beef | 46 | int hdr_flags; /* ipvs flags */ |
b0e010c5 | 47 | __u32 off; /* Where IP or IPv4 header starts */ |
63dca2c0 | 48 | __u32 len; /* IPv4 simply where L4 starts |
07dcc686 | 49 | * IPv6 where L4 Transport Header starts */ |
63dca2c0 JDB |
50 | __u16 fragoffs; /* IPv6 fragment offset, 0 if first frag (or not frag)*/ |
51 | __s16 protocol; | |
52 | __s32 flags; | |
64aae3cb JV |
53 | union nf_inet_addr saddr; |
54 | union nf_inet_addr daddr; | |
55 | }; | |
56 | ||
2f74713d | 57 | static inline void *frag_safe_skb_hp(const struct sk_buff *skb, int offset, |
6b3d9330 | 58 | int len, void *buffer) |
2f74713d JDB |
59 | { |
60 | return skb_header_pointer(skb, offset, len, buffer); | |
61 | } | |
2f74713d | 62 | |
63dca2c0 JDB |
63 | /* This function handles filling *ip_vs_iphdr, both for IPv4 and IPv6. |
64 | * IPv6 requires some extra work, as finding proper header position, | |
65 | * depend on the IPv6 extension headers. | |
66 | */ | |
b0e010c5 AG |
67 | static inline int |
68 | ip_vs_fill_iph_skb_off(int af, const struct sk_buff *skb, int offset, | |
4fd9beef | 69 | int hdr_flags, struct ip_vs_iphdr *iphdr) |
64aae3cb | 70 | { |
4fd9beef | 71 | iphdr->hdr_flags = hdr_flags; |
b0e010c5 | 72 | iphdr->off = offset; |
4fd9beef | 73 | |
64aae3cb JV |
74 | #ifdef CONFIG_IP_VS_IPV6 |
75 | if (af == AF_INET6) { | |
b0e010c5 AG |
76 | struct ipv6hdr _iph; |
77 | const struct ipv6hdr *iph = skb_header_pointer( | |
78 | skb, offset, sizeof(_iph), &_iph); | |
79 | if (!iph) | |
80 | return 0; | |
81 | ||
4e3fd7a0 AD |
82 | iphdr->saddr.in6 = iph->saddr; |
83 | iphdr->daddr.in6 = iph->daddr; | |
6aafeef0 | 84 | /* ipv6_find_hdr() updates len, flags */ |
b0e010c5 | 85 | iphdr->len = offset; |
63dca2c0 JDB |
86 | iphdr->flags = 0; |
87 | iphdr->protocol = ipv6_find_hdr(skb, &iphdr->len, -1, | |
88 | &iphdr->fragoffs, | |
89 | &iphdr->flags); | |
b0e010c5 AG |
90 | if (iphdr->protocol < 0) |
91 | return 0; | |
64aae3cb JV |
92 | } else |
93 | #endif | |
94 | { | |
b0e010c5 AG |
95 | struct iphdr _iph; |
96 | const struct iphdr *iph = skb_header_pointer( | |
97 | skb, offset, sizeof(_iph), &_iph); | |
98 | if (!iph) | |
99 | return 0; | |
100 | ||
101 | iphdr->len = offset + iph->ihl * 4; | |
63dca2c0 JDB |
102 | iphdr->fragoffs = 0; |
103 | iphdr->protocol = iph->protocol; | |
104 | iphdr->saddr.ip = iph->saddr; | |
105 | iphdr->daddr.ip = iph->daddr; | |
106 | } | |
b0e010c5 AG |
107 | |
108 | return 1; | |
109 | } | |
110 | ||
111 | static inline int | |
4fd9beef AG |
112 | ip_vs_fill_iph_skb_icmp(int af, const struct sk_buff *skb, int offset, |
113 | bool inverse, struct ip_vs_iphdr *iphdr) | |
114 | { | |
115 | int hdr_flags = IP_VS_HDR_ICMP; | |
116 | ||
117 | if (inverse) | |
118 | hdr_flags |= IP_VS_HDR_INVERSE; | |
119 | ||
120 | return ip_vs_fill_iph_skb_off(af, skb, offset, hdr_flags, iphdr); | |
121 | } | |
122 | ||
123 | static inline int | |
124 | ip_vs_fill_iph_skb(int af, const struct sk_buff *skb, bool inverse, | |
125 | struct ip_vs_iphdr *iphdr) | |
126 | { | |
127 | int hdr_flags = 0; | |
128 | ||
129 | if (inverse) | |
130 | hdr_flags |= IP_VS_HDR_INVERSE; | |
131 | ||
132 | return ip_vs_fill_iph_skb_off(af, skb, skb_network_offset(skb), | |
133 | hdr_flags, iphdr); | |
134 | } | |
135 | ||
136 | static inline bool | |
137 | ip_vs_iph_inverse(const struct ip_vs_iphdr *iph) | |
138 | { | |
139 | return !!(iph->hdr_flags & IP_VS_HDR_INVERSE); | |
140 | } | |
141 | ||
142 | static inline bool | |
143 | ip_vs_iph_icmp(const struct ip_vs_iphdr *iph) | |
b0e010c5 | 144 | { |
4fd9beef | 145 | return !!(iph->hdr_flags & IP_VS_HDR_ICMP); |
63dca2c0 JDB |
146 | } |
147 | ||
64aae3cb JV |
148 | static inline void ip_vs_addr_copy(int af, union nf_inet_addr *dst, |
149 | const union nf_inet_addr *src) | |
150 | { | |
151 | #ifdef CONFIG_IP_VS_IPV6 | |
152 | if (af == AF_INET6) | |
4e3fd7a0 | 153 | dst->in6 = src->in6; |
64aae3cb JV |
154 | else |
155 | #endif | |
156 | dst->ip = src->ip; | |
157 | } | |
158 | ||
9a05475c JA |
159 | static inline void ip_vs_addr_set(int af, union nf_inet_addr *dst, |
160 | const union nf_inet_addr *src) | |
161 | { | |
162 | #ifdef CONFIG_IP_VS_IPV6 | |
163 | if (af == AF_INET6) { | |
164 | dst->in6 = src->in6; | |
165 | return; | |
166 | } | |
167 | #endif | |
168 | dst->ip = src->ip; | |
169 | dst->all[1] = 0; | |
170 | dst->all[2] = 0; | |
171 | dst->all[3] = 0; | |
172 | } | |
173 | ||
64aae3cb JV |
174 | static inline int ip_vs_addr_equal(int af, const union nf_inet_addr *a, |
175 | const union nf_inet_addr *b) | |
176 | { | |
177 | #ifdef CONFIG_IP_VS_IPV6 | |
178 | if (af == AF_INET6) | |
179 | return ipv6_addr_equal(&a->in6, &b->in6); | |
180 | #endif | |
181 | return a->ip == b->ip; | |
182 | } | |
183 | ||
1da177e4 | 184 | #ifdef CONFIG_IP_VS_DEBUG |
14c85021 ACM |
185 | #include <linux/net.h> |
186 | ||
5c3a0fd7 | 187 | int ip_vs_get_debug_level(void); |
c842a3ad JV |
188 | |
189 | static inline const char *ip_vs_dbg_addr(int af, char *buf, size_t buf_len, | |
190 | const union nf_inet_addr *addr, | |
191 | int *idx) | |
192 | { | |
193 | int len; | |
194 | #ifdef CONFIG_IP_VS_IPV6 | |
195 | if (af == AF_INET6) | |
120b9c14 | 196 | len = snprintf(&buf[*idx], buf_len - *idx, "[%pI6c]", |
0c6ce78a | 197 | &addr->in6) + 1; |
c842a3ad JV |
198 | else |
199 | #endif | |
3685f25d HH |
200 | len = snprintf(&buf[*idx], buf_len - *idx, "%pI4", |
201 | &addr->ip) + 1; | |
c842a3ad JV |
202 | |
203 | *idx += len; | |
204 | BUG_ON(*idx > buf_len + 1); | |
205 | return &buf[*idx - len]; | |
206 | } | |
207 | ||
9aada7ac HE |
208 | #define IP_VS_DBG_BUF(level, msg, ...) \ |
209 | do { \ | |
210 | char ip_vs_dbg_buf[160]; \ | |
211 | int ip_vs_dbg_idx = 0; \ | |
212 | if (level <= ip_vs_get_debug_level()) \ | |
213 | printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ | |
214 | } while (0) | |
215 | #define IP_VS_ERR_BUF(msg...) \ | |
216 | do { \ | |
217 | char ip_vs_dbg_buf[160]; \ | |
218 | int ip_vs_dbg_idx = 0; \ | |
219 | pr_err(msg); \ | |
220 | } while (0) | |
c842a3ad JV |
221 | |
222 | /* Only use from within IP_VS_DBG_BUF() or IP_VS_ERR_BUF macros */ | |
9aada7ac HE |
223 | #define IP_VS_DBG_ADDR(af, addr) \ |
224 | ip_vs_dbg_addr(af, ip_vs_dbg_buf, \ | |
225 | sizeof(ip_vs_dbg_buf), addr, \ | |
226 | &ip_vs_dbg_idx) | |
227 | ||
228 | #define IP_VS_DBG(level, msg, ...) \ | |
229 | do { \ | |
230 | if (level <= ip_vs_get_debug_level()) \ | |
231 | printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ | |
232 | } while (0) | |
233 | #define IP_VS_DBG_RL(msg, ...) \ | |
234 | do { \ | |
235 | if (net_ratelimit()) \ | |
236 | printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ | |
237 | } while (0) | |
0d79641a | 238 | #define IP_VS_DBG_PKT(level, af, pp, skb, ofs, msg) \ |
9aada7ac HE |
239 | do { \ |
240 | if (level <= ip_vs_get_debug_level()) \ | |
0d79641a | 241 | pp->debug_packet(af, pp, skb, ofs, msg); \ |
9aada7ac | 242 | } while (0) |
0d79641a | 243 | #define IP_VS_DBG_RL_PKT(level, af, pp, skb, ofs, msg) \ |
9aada7ac HE |
244 | do { \ |
245 | if (level <= ip_vs_get_debug_level() && \ | |
246 | net_ratelimit()) \ | |
0d79641a | 247 | pp->debug_packet(af, pp, skb, ofs, msg); \ |
9aada7ac | 248 | } while (0) |
1da177e4 | 249 | #else /* NO DEBUGGING at ALL */ |
c842a3ad JV |
250 | #define IP_VS_DBG_BUF(level, msg...) do {} while (0) |
251 | #define IP_VS_ERR_BUF(msg...) do {} while (0) | |
1da177e4 LT |
252 | #define IP_VS_DBG(level, msg...) do {} while (0) |
253 | #define IP_VS_DBG_RL(msg...) do {} while (0) | |
0d79641a JA |
254 | #define IP_VS_DBG_PKT(level, af, pp, skb, ofs, msg) do {} while (0) |
255 | #define IP_VS_DBG_RL_PKT(level, af, pp, skb, ofs, msg) do {} while (0) | |
1da177e4 LT |
256 | #endif |
257 | ||
258 | #define IP_VS_BUG() BUG() | |
1e3e238e | 259 | #define IP_VS_ERR_RL(msg, ...) \ |
9aada7ac HE |
260 | do { \ |
261 | if (net_ratelimit()) \ | |
1e3e238e | 262 | pr_err(msg, ##__VA_ARGS__); \ |
9aada7ac | 263 | } while (0) |
1da177e4 LT |
264 | |
265 | #ifdef CONFIG_IP_VS_DEBUG | |
266 | #define EnterFunction(level) \ | |
9aada7ac HE |
267 | do { \ |
268 | if (level <= ip_vs_get_debug_level()) \ | |
269 | printk(KERN_DEBUG \ | |
270 | pr_fmt("Enter: %s, %s line %i\n"), \ | |
271 | __func__, __FILE__, __LINE__); \ | |
272 | } while (0) | |
273 | #define LeaveFunction(level) \ | |
274 | do { \ | |
275 | if (level <= ip_vs_get_debug_level()) \ | |
276 | printk(KERN_DEBUG \ | |
277 | pr_fmt("Leave: %s, %s line %i\n"), \ | |
278 | __func__, __FILE__, __LINE__); \ | |
279 | } while (0) | |
1da177e4 LT |
280 | #else |
281 | #define EnterFunction(level) do {} while (0) | |
282 | #define LeaveFunction(level) do {} while (0) | |
283 | #endif | |
284 | ||
07dcc686 | 285 | /* The port number of FTP service (in network order). */ |
f3a7c66b HH |
286 | #define FTPPORT cpu_to_be16(21) |
287 | #define FTPDATA cpu_to_be16(20) | |
1da177e4 | 288 | |
07dcc686 | 289 | /* TCP State Values */ |
1da177e4 LT |
290 | enum { |
291 | IP_VS_TCP_S_NONE = 0, | |
292 | IP_VS_TCP_S_ESTABLISHED, | |
293 | IP_VS_TCP_S_SYN_SENT, | |
294 | IP_VS_TCP_S_SYN_RECV, | |
295 | IP_VS_TCP_S_FIN_WAIT, | |
296 | IP_VS_TCP_S_TIME_WAIT, | |
297 | IP_VS_TCP_S_CLOSE, | |
298 | IP_VS_TCP_S_CLOSE_WAIT, | |
299 | IP_VS_TCP_S_LAST_ACK, | |
300 | IP_VS_TCP_S_LISTEN, | |
301 | IP_VS_TCP_S_SYNACK, | |
302 | IP_VS_TCP_S_LAST | |
303 | }; | |
304 | ||
07dcc686 | 305 | /* UDP State Values */ |
1da177e4 LT |
306 | enum { |
307 | IP_VS_UDP_S_NORMAL, | |
308 | IP_VS_UDP_S_LAST, | |
309 | }; | |
310 | ||
07dcc686 | 311 | /* ICMP State Values */ |
1da177e4 LT |
312 | enum { |
313 | IP_VS_ICMP_S_NORMAL, | |
314 | IP_VS_ICMP_S_LAST, | |
315 | }; | |
316 | ||
07dcc686 | 317 | /* SCTP State Values */ |
2906f66a VMR |
318 | enum ip_vs_sctp_states { |
319 | IP_VS_SCTP_S_NONE, | |
61e7c420 JA |
320 | IP_VS_SCTP_S_INIT1, |
321 | IP_VS_SCTP_S_INIT, | |
322 | IP_VS_SCTP_S_COOKIE_SENT, | |
323 | IP_VS_SCTP_S_COOKIE_REPLIED, | |
324 | IP_VS_SCTP_S_COOKIE_WAIT, | |
325 | IP_VS_SCTP_S_COOKIE, | |
326 | IP_VS_SCTP_S_COOKIE_ECHOED, | |
2906f66a | 327 | IP_VS_SCTP_S_ESTABLISHED, |
61e7c420 JA |
328 | IP_VS_SCTP_S_SHUTDOWN_SENT, |
329 | IP_VS_SCTP_S_SHUTDOWN_RECEIVED, | |
330 | IP_VS_SCTP_S_SHUTDOWN_ACK_SENT, | |
331 | IP_VS_SCTP_S_REJECTED, | |
2906f66a VMR |
332 | IP_VS_SCTP_S_CLOSED, |
333 | IP_VS_SCTP_S_LAST | |
334 | }; | |
335 | ||
27541143 JA |
336 | /* Connection templates use bits from state */ |
337 | #define IP_VS_CTPL_S_NONE 0x0000 | |
338 | #define IP_VS_CTPL_S_ASSURED 0x0001 | |
339 | #define IP_VS_CTPL_S_LAST 0x0002 | |
340 | ||
07dcc686 SH |
341 | /* Delta sequence info structure |
342 | * Each ip_vs_conn has 2 (output AND input seq. changes). | |
343 | * Only used in the VS/NAT. | |
1da177e4 LT |
344 | */ |
345 | struct ip_vs_seq { | |
346 | __u32 init_seq; /* Add delta from this seq */ | |
347 | __u32 delta; /* Delta in sequence numbers */ | |
348 | __u32 previous_delta; /* Delta in sequence numbers | |
07dcc686 | 349 | * before last resized pkt */ |
1da177e4 LT |
350 | }; |
351 | ||
07dcc686 | 352 | /* counters per cpu */ |
b17fc996 | 353 | struct ip_vs_counters { |
cd67cd5e JA |
354 | __u64 conns; /* connections scheduled */ |
355 | __u64 inpkts; /* incoming packets */ | |
356 | __u64 outpkts; /* outgoing packets */ | |
b17fc996 HS |
357 | __u64 inbytes; /* incoming bytes */ |
358 | __u64 outbytes; /* outgoing bytes */ | |
359 | }; | |
07dcc686 | 360 | /* Stats per cpu */ |
b17fc996 | 361 | struct ip_vs_cpu_stats { |
cd67cd5e | 362 | struct ip_vs_counters cnt; |
b17fc996 HS |
363 | struct u64_stats_sync syncp; |
364 | }; | |
1da177e4 | 365 | |
07dcc686 | 366 | /* IPVS statistics objects */ |
3a14a313 SW |
367 | struct ip_vs_estimator { |
368 | struct list_head list; | |
369 | ||
370 | u64 last_inbytes; | |
371 | u64 last_outbytes; | |
cd67cd5e JA |
372 | u64 last_conns; |
373 | u64 last_inpkts; | |
374 | u64 last_outpkts; | |
375 | ||
376 | u64 cps; | |
377 | u64 inpps; | |
378 | u64 outpps; | |
379 | u64 inbps; | |
380 | u64 outbps; | |
381 | }; | |
382 | ||
383 | /* | |
384 | * IPVS statistics object, 64-bit kernel version of struct ip_vs_stats_user | |
385 | */ | |
386 | struct ip_vs_kstats { | |
387 | u64 conns; /* connections scheduled */ | |
388 | u64 inpkts; /* incoming packets */ | |
389 | u64 outpkts; /* outgoing packets */ | |
390 | u64 inbytes; /* incoming bytes */ | |
391 | u64 outbytes; /* outgoing bytes */ | |
392 | ||
393 | u64 cps; /* current connection rate */ | |
394 | u64 inpps; /* current in packet rate */ | |
395 | u64 outpps; /* current out packet rate */ | |
396 | u64 inbps; /* current in byte rate */ | |
397 | u64 outbps; /* current out byte rate */ | |
3a14a313 SW |
398 | }; |
399 | ||
fd2c3ef7 | 400 | struct ip_vs_stats { |
cd67cd5e | 401 | struct ip_vs_kstats kstats; /* kernel statistics */ |
e9c0ce23 | 402 | struct ip_vs_estimator est; /* estimator */ |
b962abdc | 403 | struct ip_vs_cpu_stats __percpu *cpustats; /* per cpu counters */ |
b17fc996 | 404 | spinlock_t lock; /* spin lock */ |
cd67cd5e | 405 | struct ip_vs_kstats kstats0; /* reset values */ |
1da177e4 LT |
406 | }; |
407 | ||
14c85021 ACM |
408 | struct dst_entry; |
409 | struct iphdr; | |
1da177e4 LT |
410 | struct ip_vs_conn; |
411 | struct ip_vs_app; | |
14c85021 | 412 | struct sk_buff; |
252c6410 | 413 | struct ip_vs_proto_data; |
1da177e4 LT |
414 | |
415 | struct ip_vs_protocol { | |
416 | struct ip_vs_protocol *next; | |
417 | char *name; | |
2ad17def JA |
418 | u16 protocol; |
419 | u16 num_states; | |
1da177e4 | 420 | int dont_defrag; |
1da177e4 LT |
421 | |
422 | void (*init)(struct ip_vs_protocol *pp); | |
423 | ||
424 | void (*exit)(struct ip_vs_protocol *pp); | |
425 | ||
1281a9c2 | 426 | int (*init_netns)(struct netns_ipvs *ipvs, struct ip_vs_proto_data *pd); |
252c6410 | 427 | |
1281a9c2 | 428 | void (*exit_netns)(struct netns_ipvs *ipvs, struct ip_vs_proto_data *pd); |
252c6410 | 429 | |
d8f44c33 EB |
430 | int (*conn_schedule)(struct netns_ipvs *ipvs, |
431 | int af, struct sk_buff *skb, | |
9330419d | 432 | struct ip_vs_proto_data *pd, |
d4383f04 JDB |
433 | int *verdict, struct ip_vs_conn **cpp, |
434 | struct ip_vs_iphdr *iph); | |
1da177e4 LT |
435 | |
436 | struct ip_vs_conn * | |
ab161976 EB |
437 | (*conn_in_get)(struct netns_ipvs *ipvs, |
438 | int af, | |
51ef348b | 439 | const struct sk_buff *skb, |
802c41ad | 440 | const struct ip_vs_iphdr *iph); |
1da177e4 LT |
441 | |
442 | struct ip_vs_conn * | |
0cf705c8 EB |
443 | (*conn_out_get)(struct netns_ipvs *ipvs, |
444 | int af, | |
51ef348b | 445 | const struct sk_buff *skb, |
802c41ad | 446 | const struct ip_vs_iphdr *iph); |
1da177e4 | 447 | |
d4383f04 JDB |
448 | int (*snat_handler)(struct sk_buff *skb, struct ip_vs_protocol *pp, |
449 | struct ip_vs_conn *cp, struct ip_vs_iphdr *iph); | |
1da177e4 | 450 | |
d4383f04 JDB |
451 | int (*dnat_handler)(struct sk_buff *skb, struct ip_vs_protocol *pp, |
452 | struct ip_vs_conn *cp, struct ip_vs_iphdr *iph); | |
1da177e4 | 453 | |
1da177e4 LT |
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; | |
84c0d5e9 JH |
601 | |
602 | u16 tun_type; /* tunnel type */ | |
603 | __be16 tun_port; /* tunnel port */ | |
29930e31 | 604 | u16 tun_flags; /* tunnel flags */ |
c860c6b1 JV |
605 | }; |
606 | ||
607 | ||
1da177e4 | 608 | /* |
07dcc686 SH |
609 | * The information about the virtual service offered to the net and the |
610 | * forwarding entries. | |
1da177e4 LT |
611 | */ |
612 | struct ip_vs_service { | |
ceec4c38 JA |
613 | struct hlist_node s_list; /* for normal service table */ |
614 | struct hlist_node f_list; /* for fwmark-based service table */ | |
1da177e4 | 615 | atomic_t refcnt; /* reference counter */ |
1da177e4 | 616 | |
e7ade46a | 617 | u16 af; /* address family */ |
1da177e4 | 618 | __u16 protocol; /* which protocol (TCP/UDP) */ |
e7ade46a | 619 | union nf_inet_addr addr; /* IP address for virtual service */ |
014d730d | 620 | __be16 port; /* port number for the service */ |
1da177e4 | 621 | __u32 fwmark; /* firewall mark of the service */ |
95c96174 ED |
622 | unsigned int flags; /* service status flags */ |
623 | unsigned int timeout; /* persistent timeout in ticks */ | |
0a925864 | 624 | __be32 netmask; /* grouping granularity, mask/plen */ |
3109d2f2 | 625 | struct netns_ipvs *ipvs; |
1da177e4 LT |
626 | |
627 | struct list_head destinations; /* real server d-linked list */ | |
628 | __u32 num_dests; /* number of servers */ | |
629 | struct ip_vs_stats stats; /* statistics for the service */ | |
1da177e4 LT |
630 | |
631 | /* for scheduling */ | |
ceec4c38 | 632 | struct ip_vs_scheduler __rcu *scheduler; /* bound scheduler object */ |
ba3a3ce1 | 633 | spinlock_t sched_lock; /* lock sched_data */ |
1da177e4 | 634 | void *sched_data; /* scheduler application data */ |
85999283 SH |
635 | |
636 | /* alternate persistence engine */ | |
ceec4c38 | 637 | struct ip_vs_pe __rcu *pe; |
31875d49 | 638 | int conntrack_afmask; |
ceec4c38 JA |
639 | |
640 | struct rcu_head rcu_head; | |
1da177e4 LT |
641 | }; |
642 | ||
026ace06 JA |
643 | /* Information for cached dst */ |
644 | struct ip_vs_dest_dst { | |
645 | struct dst_entry *dst_cache; /* destination cache entry */ | |
646 | u32 dst_cookie; | |
647 | union nf_inet_addr dst_saddr; | |
648 | struct rcu_head rcu_head; | |
649 | }; | |
1da177e4 | 650 | |
07dcc686 SH |
651 | /* The real server destination forwarding entry with ip address, port number, |
652 | * and so on. | |
1da177e4 LT |
653 | */ |
654 | struct ip_vs_dest { | |
655 | struct list_head n_list; /* for the dests in the service */ | |
276472ea | 656 | struct hlist_node d_list; /* for table with all the dests */ |
1da177e4 | 657 | |
e7ade46a | 658 | u16 af; /* address family */ |
014d730d | 659 | __be16 port; /* port number of the server */ |
f2431e6e | 660 | union nf_inet_addr addr; /* IP address of the server */ |
95c96174 | 661 | volatile unsigned int flags; /* dest status flags */ |
1da177e4 LT |
662 | atomic_t conn_flags; /* flags to copy to conn */ |
663 | atomic_t weight; /* server weight */ | |
a2c09ac0 | 664 | atomic_t last_weight; /* server latest weight */ |
84c0d5e9 JH |
665 | __u16 tun_type; /* tunnel type */ |
666 | __be16 tun_port; /* tunnel port */ | |
29930e31 | 667 | __u16 tun_flags; /* tunnel flags */ |
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 | 810 | unsigned int sync_queue_delay; |
f73181c8 PNA |
811 | struct delayed_work master_wakeup_work; |
812 | struct netns_ipvs *ipvs; | |
813 | }; | |
814 | ||
5db7c8b9 JA |
815 | struct ip_vs_sync_thread_data; |
816 | ||
578bc3ef JA |
817 | /* How much time to keep dests in trash */ |
818 | #define IP_VS_DEST_TRASH_PERIOD (120 * HZ) | |
819 | ||
e4ff6751 | 820 | struct ipvs_sync_daemon_cfg { |
d3328817 | 821 | union nf_inet_addr mcast_group; |
e4ff6751 JA |
822 | int syncid; |
823 | u16 sync_maxlen; | |
d3328817 JA |
824 | u16 mcast_port; |
825 | u8 mcast_af; | |
826 | u8 mcast_ttl; | |
e4ff6751 JA |
827 | /* multicast interface name */ |
828 | char mcast_ifn[IP_VS_IFNAME_MAXLEN]; | |
829 | }; | |
830 | ||
2553d064 JA |
831 | /* IPVS in network namespace */ |
832 | struct netns_ipvs { | |
833 | int gen; /* Generation */ | |
7a4f0761 | 834 | int enable; /* enable like nf_hooks do */ |
07dcc686 | 835 | /* Hash table: for real service lookups */ |
2553d064 JA |
836 | #define IP_VS_RTAB_BITS 4 |
837 | #define IP_VS_RTAB_SIZE (1 << IP_VS_RTAB_BITS) | |
838 | #define IP_VS_RTAB_MASK (IP_VS_RTAB_SIZE - 1) | |
839 | ||
276472ea | 840 | struct hlist_head rs_table[IP_VS_RTAB_SIZE]; |
2553d064 JA |
841 | /* ip_vs_app */ |
842 | struct list_head app_list; | |
2553d064 JA |
843 | /* ip_vs_proto */ |
844 | #define IP_VS_PROTO_TAB_SIZE 32 /* must be power of 2 */ | |
845 | struct ip_vs_proto_data *proto_data_table[IP_VS_PROTO_TAB_SIZE]; | |
846 | /* ip_vs_proto_tcp */ | |
847 | #ifdef CONFIG_IP_VS_PROTO_TCP | |
848 | #define TCP_APP_TAB_BITS 4 | |
849 | #define TCP_APP_TAB_SIZE (1 << TCP_APP_TAB_BITS) | |
850 | #define TCP_APP_TAB_MASK (TCP_APP_TAB_SIZE - 1) | |
851 | struct list_head tcp_apps[TCP_APP_TAB_SIZE]; | |
2553d064 JA |
852 | #endif |
853 | /* ip_vs_proto_udp */ | |
854 | #ifdef CONFIG_IP_VS_PROTO_UDP | |
855 | #define UDP_APP_TAB_BITS 4 | |
856 | #define UDP_APP_TAB_SIZE (1 << UDP_APP_TAB_BITS) | |
857 | #define UDP_APP_TAB_MASK (UDP_APP_TAB_SIZE - 1) | |
858 | struct list_head udp_apps[UDP_APP_TAB_SIZE]; | |
2553d064 JA |
859 | #endif |
860 | /* ip_vs_proto_sctp */ | |
861 | #ifdef CONFIG_IP_VS_PROTO_SCTP | |
862 | #define SCTP_APP_TAB_BITS 4 | |
863 | #define SCTP_APP_TAB_SIZE (1 << SCTP_APP_TAB_BITS) | |
864 | #define SCTP_APP_TAB_MASK (SCTP_APP_TAB_SIZE - 1) | |
865 | /* Hash table for SCTP application incarnations */ | |
866 | struct list_head sctp_apps[SCTP_APP_TAB_SIZE]; | |
2553d064 JA |
867 | #endif |
868 | /* ip_vs_conn */ | |
07dcc686 | 869 | atomic_t conn_count; /* connection counter */ |
2553d064 JA |
870 | |
871 | /* ip_vs_ctl */ | |
2a0751af | 872 | struct ip_vs_stats tot_stats; /* Statistics & est. */ |
2553d064 JA |
873 | |
874 | int num_services; /* no of virtual services */ | |
857ca897 | 875 | int num_services6; /* IPv6 virtual services */ |
f2247fbd | 876 | |
f2247fbd SH |
877 | /* Trash for destinations */ |
878 | struct list_head dest_trash; | |
578bc3ef JA |
879 | spinlock_t dest_trash_lock; |
880 | struct timer_list dest_trash_timer; /* expiration timer */ | |
f2247fbd SH |
881 | /* Service counters */ |
882 | atomic_t ftpsvc_counter; | |
883 | atomic_t nullsvc_counter; | |
39b97223 | 884 | atomic_t conn_out_counter; |
f2247fbd SH |
885 | |
886 | #ifdef CONFIG_SYSCTL | |
35dfb013 ASK |
887 | /* delayed work for expiring no dest connections */ |
888 | struct delayed_work expire_nodest_conn_work; | |
2553d064 JA |
889 | /* 1/rate drop and drop-entry variables */ |
890 | struct delayed_work defense_work; /* Work handler */ | |
891 | int drop_rate; | |
892 | int drop_counter; | |
c24b75e0 | 893 | int old_secure_tcp; |
2553d064 JA |
894 | atomic_t dropentry; |
895 | /* locks in ctl.c */ | |
896 | spinlock_t dropentry_lock; /* drop entry handling */ | |
897 | spinlock_t droppacket_lock; /* drop packet handling */ | |
898 | spinlock_t securetcp_lock; /* state and timeout tables */ | |
2553d064 JA |
899 | |
900 | /* sys-ctl struct */ | |
901 | struct ctl_table_header *sysctl_hdr; | |
902 | struct ctl_table *sysctl_tbl; | |
f2247fbd SH |
903 | #endif |
904 | ||
2553d064 JA |
905 | /* sysctl variables */ |
906 | int sysctl_amemthresh; | |
907 | int sysctl_am_droprate; | |
908 | int sysctl_drop_entry; | |
909 | int sysctl_drop_packet; | |
910 | int sysctl_secure_tcp; | |
911 | #ifdef CONFIG_IP_VS_NFCT | |
912 | int sysctl_conntrack; | |
913 | #endif | |
914 | int sysctl_snat_reroute; | |
915 | int sysctl_sync_ver; | |
f73181c8 | 916 | int sysctl_sync_ports; |
4d0c875d | 917 | int sysctl_sync_persist_mode; |
07995674 | 918 | unsigned long sysctl_sync_qlen_max; |
1c003b15 | 919 | int sysctl_sync_sock_size; |
2553d064 JA |
920 | int sysctl_cache_bypass; |
921 | int sysctl_expire_nodest_conn; | |
c6c96c18 AF |
922 | int sysctl_sloppy_tcp; |
923 | int sysctl_sloppy_sctp; | |
2553d064 JA |
924 | int sysctl_expire_quiescent_template; |
925 | int sysctl_sync_threshold[2]; | |
749c42b6 JA |
926 | unsigned int sysctl_sync_refresh_period; |
927 | int sysctl_sync_retries; | |
2553d064 | 928 | int sysctl_nat_icmp_send; |
3654e611 | 929 | int sysctl_pmtu_disc; |
0c12582f | 930 | int sysctl_backup_only; |
d752c364 | 931 | int sysctl_conn_reuse_mode; |
94485fed | 932 | int sysctl_schedule_icmp; |
4e478098 | 933 | int sysctl_ignore_tunneled; |
2553d064 JA |
934 | |
935 | /* ip_vs_lblc */ | |
936 | int sysctl_lblc_expiration; | |
937 | struct ctl_table_header *lblc_ctl_header; | |
938 | struct ctl_table *lblc_ctl_table; | |
939 | /* ip_vs_lblcr */ | |
940 | int sysctl_lblcr_expiration; | |
941 | struct ctl_table_header *lblcr_ctl_header; | |
942 | struct ctl_table *lblcr_ctl_table; | |
943 | /* ip_vs_est */ | |
944 | struct list_head est_list; /* estimator list */ | |
945 | spinlock_t est_lock; | |
946 | struct timer_list est_timer; /* Estimation timer */ | |
947 | /* ip_vs_sync */ | |
2553d064 | 948 | spinlock_t sync_lock; |
f73181c8 | 949 | struct ipvs_master_sync_state *ms; |
2553d064 | 950 | spinlock_t sync_buff_lock; |
5db7c8b9 JA |
951 | struct ip_vs_sync_thread_data *master_tinfo; |
952 | struct ip_vs_sync_thread_data *backup_tinfo; | |
f73181c8 | 953 | int threads_mask; |
2553d064 | 954 | volatile int sync_state; |
ae1d48b2 | 955 | struct mutex sync_mutex; |
e4ff6751 JA |
956 | struct ipvs_sync_daemon_cfg mcfg; /* Master Configuration */ |
957 | struct ipvs_sync_daemon_cfg bcfg; /* Backup Configuration */ | |
2553d064 JA |
958 | /* net name space ptr */ |
959 | struct net *net; /* Needed by timer routines */ | |
07dcc686 SH |
960 | /* Number of heterogeneous destinations, needed becaus heterogeneous |
961 | * are not supported when synchronization is enabled. | |
962 | */ | |
391f503d | 963 | unsigned int mixed_address_family_dests; |
857ca897 | 964 | unsigned int hooks_afmask; /* &1=AF_INET, &2=AF_INET6 */ |
2553d064 | 965 | }; |
1da177e4 | 966 | |
59e0350e SH |
967 | #define DEFAULT_SYNC_THRESHOLD 3 |
968 | #define DEFAULT_SYNC_PERIOD 50 | |
7532e8d4 | 969 | #define DEFAULT_SYNC_VER 1 |
c6c96c18 AF |
970 | #define DEFAULT_SLOPPY_TCP 0 |
971 | #define DEFAULT_SLOPPY_SCTP 0 | |
749c42b6 JA |
972 | #define DEFAULT_SYNC_REFRESH_PERIOD (0U * HZ) |
973 | #define DEFAULT_SYNC_RETRIES 0 | |
1c003b15 PNA |
974 | #define IPVS_SYNC_WAKEUP_RATE 8 |
975 | #define IPVS_SYNC_QLEN_MAX (IPVS_SYNC_WAKEUP_RATE * 4) | |
976 | #define IPVS_SYNC_SEND_DELAY (HZ / 50) | |
977 | #define IPVS_SYNC_CHECK_PERIOD HZ | |
749c42b6 | 978 | #define IPVS_SYNC_FLUSH_TIME (HZ * 2) |
f73181c8 | 979 | #define IPVS_SYNC_PORTS_MAX (1 << 6) |
59e0350e SH |
980 | |
981 | #ifdef CONFIG_SYSCTL | |
982 | ||
983 | static inline int sysctl_sync_threshold(struct netns_ipvs *ipvs) | |
984 | { | |
985 | return ipvs->sysctl_sync_threshold[0]; | |
986 | } | |
987 | ||
988 | static inline int sysctl_sync_period(struct netns_ipvs *ipvs) | |
989 | { | |
6aa7de05 | 990 | return READ_ONCE(ipvs->sysctl_sync_threshold[1]); |
749c42b6 JA |
991 | } |
992 | ||
993 | static inline unsigned int sysctl_sync_refresh_period(struct netns_ipvs *ipvs) | |
994 | { | |
6aa7de05 | 995 | return READ_ONCE(ipvs->sysctl_sync_refresh_period); |
749c42b6 JA |
996 | } |
997 | ||
998 | static inline int sysctl_sync_retries(struct netns_ipvs *ipvs) | |
999 | { | |
1000 | return ipvs->sysctl_sync_retries; | |
59e0350e SH |
1001 | } |
1002 | ||
7532e8d4 SH |
1003 | static inline int sysctl_sync_ver(struct netns_ipvs *ipvs) |
1004 | { | |
1005 | return ipvs->sysctl_sync_ver; | |
1006 | } | |
1007 | ||
c6c96c18 AF |
1008 | static inline int sysctl_sloppy_tcp(struct netns_ipvs *ipvs) |
1009 | { | |
1010 | return ipvs->sysctl_sloppy_tcp; | |
1011 | } | |
1012 | ||
1013 | static inline int sysctl_sloppy_sctp(struct netns_ipvs *ipvs) | |
1014 | { | |
1015 | return ipvs->sysctl_sloppy_sctp; | |
1016 | } | |
1017 | ||
f73181c8 PNA |
1018 | static inline int sysctl_sync_ports(struct netns_ipvs *ipvs) |
1019 | { | |
6aa7de05 | 1020 | return READ_ONCE(ipvs->sysctl_sync_ports); |
f73181c8 PNA |
1021 | } |
1022 | ||
4d0c875d JA |
1023 | static inline int sysctl_sync_persist_mode(struct netns_ipvs *ipvs) |
1024 | { | |
1025 | return ipvs->sysctl_sync_persist_mode; | |
1026 | } | |
1027 | ||
07995674 | 1028 | static inline unsigned long sysctl_sync_qlen_max(struct netns_ipvs *ipvs) |
1c003b15 PNA |
1029 | { |
1030 | return ipvs->sysctl_sync_qlen_max; | |
1031 | } | |
1032 | ||
1033 | static inline int sysctl_sync_sock_size(struct netns_ipvs *ipvs) | |
1034 | { | |
1035 | return ipvs->sysctl_sync_sock_size; | |
1036 | } | |
1037 | ||
3654e611 JA |
1038 | static inline int sysctl_pmtu_disc(struct netns_ipvs *ipvs) |
1039 | { | |
1040 | return ipvs->sysctl_pmtu_disc; | |
1041 | } | |
1042 | ||
0c12582f JA |
1043 | static inline int sysctl_backup_only(struct netns_ipvs *ipvs) |
1044 | { | |
1045 | return ipvs->sync_state & IP_VS_STATE_BACKUP && | |
1046 | ipvs->sysctl_backup_only; | |
1047 | } | |
1048 | ||
d752c364 MRL |
1049 | static inline int sysctl_conn_reuse_mode(struct netns_ipvs *ipvs) |
1050 | { | |
1051 | return ipvs->sysctl_conn_reuse_mode; | |
1052 | } | |
1053 | ||
35dfb013 ASK |
1054 | static inline int sysctl_expire_nodest_conn(struct netns_ipvs *ipvs) |
1055 | { | |
1056 | return ipvs->sysctl_expire_nodest_conn; | |
1057 | } | |
1058 | ||
94485fed AG |
1059 | static inline int sysctl_schedule_icmp(struct netns_ipvs *ipvs) |
1060 | { | |
1061 | return ipvs->sysctl_schedule_icmp; | |
1062 | } | |
1063 | ||
4e478098 AG |
1064 | static inline int sysctl_ignore_tunneled(struct netns_ipvs *ipvs) |
1065 | { | |
1066 | return ipvs->sysctl_ignore_tunneled; | |
1067 | } | |
1068 | ||
57032948 EB |
1069 | static inline int sysctl_cache_bypass(struct netns_ipvs *ipvs) |
1070 | { | |
1071 | return ipvs->sysctl_cache_bypass; | |
1072 | } | |
1073 | ||
59e0350e SH |
1074 | #else |
1075 | ||
1076 | static inline int sysctl_sync_threshold(struct netns_ipvs *ipvs) | |
1077 | { | |
1078 | return DEFAULT_SYNC_THRESHOLD; | |
1079 | } | |
1080 | ||
1081 | static inline int sysctl_sync_period(struct netns_ipvs *ipvs) | |
1082 | { | |
1083 | return DEFAULT_SYNC_PERIOD; | |
1084 | } | |
1085 | ||
749c42b6 JA |
1086 | static inline unsigned int sysctl_sync_refresh_period(struct netns_ipvs *ipvs) |
1087 | { | |
1088 | return DEFAULT_SYNC_REFRESH_PERIOD; | |
1089 | } | |
1090 | ||
1091 | static inline int sysctl_sync_retries(struct netns_ipvs *ipvs) | |
1092 | { | |
1093 | return DEFAULT_SYNC_RETRIES & 3; | |
1094 | } | |
1095 | ||
7532e8d4 SH |
1096 | static inline int sysctl_sync_ver(struct netns_ipvs *ipvs) |
1097 | { | |
1098 | return DEFAULT_SYNC_VER; | |
1099 | } | |
1100 | ||
c6c96c18 AF |
1101 | static inline int sysctl_sloppy_tcp(struct netns_ipvs *ipvs) |
1102 | { | |
1103 | return DEFAULT_SLOPPY_TCP; | |
1104 | } | |
1105 | ||
1106 | static inline int sysctl_sloppy_sctp(struct netns_ipvs *ipvs) | |
1107 | { | |
1108 | return DEFAULT_SLOPPY_SCTP; | |
1109 | } | |
1110 | ||
f73181c8 PNA |
1111 | static inline int sysctl_sync_ports(struct netns_ipvs *ipvs) |
1112 | { | |
1113 | return 1; | |
1114 | } | |
1115 | ||
4d0c875d JA |
1116 | static inline int sysctl_sync_persist_mode(struct netns_ipvs *ipvs) |
1117 | { | |
1118 | return 0; | |
1119 | } | |
1120 | ||
07995674 | 1121 | static inline unsigned long sysctl_sync_qlen_max(struct netns_ipvs *ipvs) |
1c003b15 PNA |
1122 | { |
1123 | return IPVS_SYNC_QLEN_MAX; | |
1124 | } | |
1125 | ||
1126 | static inline int sysctl_sync_sock_size(struct netns_ipvs *ipvs) | |
1127 | { | |
1128 | return 0; | |
1129 | } | |
1130 | ||
3654e611 JA |
1131 | static inline int sysctl_pmtu_disc(struct netns_ipvs *ipvs) |
1132 | { | |
1133 | return 1; | |
1134 | } | |
1135 | ||
0c12582f JA |
1136 | static inline int sysctl_backup_only(struct netns_ipvs *ipvs) |
1137 | { | |
1138 | return 0; | |
1139 | } | |
1140 | ||
d752c364 MRL |
1141 | static inline int sysctl_conn_reuse_mode(struct netns_ipvs *ipvs) |
1142 | { | |
1143 | return 1; | |
1144 | } | |
1145 | ||
35dfb013 ASK |
1146 | static inline int sysctl_expire_nodest_conn(struct netns_ipvs *ipvs) |
1147 | { | |
1148 | return 0; | |
1149 | } | |
1150 | ||
94485fed AG |
1151 | static inline int sysctl_schedule_icmp(struct netns_ipvs *ipvs) |
1152 | { | |
1153 | return 0; | |
1154 | } | |
1155 | ||
4e478098 AG |
1156 | static inline int sysctl_ignore_tunneled(struct netns_ipvs *ipvs) |
1157 | { | |
1158 | return 0; | |
1159 | } | |
1160 | ||
57032948 EB |
1161 | static inline int sysctl_cache_bypass(struct netns_ipvs *ipvs) |
1162 | { | |
1163 | return 0; | |
1164 | } | |
1165 | ||
59e0350e SH |
1166 | #endif |
1167 | ||
07dcc686 SH |
1168 | /* IPVS core functions |
1169 | * (from ip_vs_core.c) | |
1da177e4 | 1170 | */ |
5c3a0fd7 JP |
1171 | const char *ip_vs_proto_name(unsigned int proto); |
1172 | void ip_vs_init_hash_table(struct list_head *table, int rows); | |
39b97223 MA |
1173 | struct ip_vs_conn *ip_vs_new_conn_out(struct ip_vs_service *svc, |
1174 | struct ip_vs_dest *dest, | |
1175 | struct sk_buff *skb, | |
1176 | const struct ip_vs_iphdr *iph, | |
1177 | __be16 dport, | |
1178 | __be16 cport); | |
afdd6140 | 1179 | #define IP_VS_INIT_HASH_TABLE(t) ip_vs_init_hash_table((t), ARRAY_SIZE((t))) |
1da177e4 | 1180 | |
1da177e4 LT |
1181 | #define IP_VS_APP_TYPE_FTP 1 |
1182 | ||
07dcc686 SH |
1183 | /* ip_vs_conn handling functions |
1184 | * (from ip_vs_conn.c) | |
1da177e4 | 1185 | */ |
1da177e4 LT |
1186 | enum { |
1187 | IP_VS_DIR_INPUT = 0, | |
1188 | IP_VS_DIR_OUTPUT, | |
1189 | IP_VS_DIR_INPUT_ONLY, | |
1190 | IP_VS_DIR_LAST, | |
1191 | }; | |
1192 | ||
19913dec | 1193 | static inline void ip_vs_conn_fill_param(struct netns_ipvs *ipvs, int af, int protocol, |
f11017ec SH |
1194 | const union nf_inet_addr *caddr, |
1195 | __be16 cport, | |
1196 | const union nf_inet_addr *vaddr, | |
1197 | __be16 vport, | |
1198 | struct ip_vs_conn_param *p) | |
1199 | { | |
19913dec | 1200 | p->ipvs = ipvs; |
f11017ec SH |
1201 | p->af = af; |
1202 | p->protocol = protocol; | |
1203 | p->caddr = caddr; | |
1204 | p->cport = cport; | |
1205 | p->vaddr = vaddr; | |
1206 | p->vport = vport; | |
85999283 SH |
1207 | p->pe = NULL; |
1208 | p->pe_data = NULL; | |
f11017ec | 1209 | } |
28364a59 | 1210 | |
f11017ec SH |
1211 | struct ip_vs_conn *ip_vs_conn_in_get(const struct ip_vs_conn_param *p); |
1212 | struct ip_vs_conn *ip_vs_ct_in_get(const struct ip_vs_conn_param *p); | |
28364a59 | 1213 | |
ab161976 EB |
1214 | struct ip_vs_conn * ip_vs_conn_in_get_proto(struct netns_ipvs *ipvs, int af, |
1215 | const struct sk_buff *skb, | |
802c41ad | 1216 | const struct ip_vs_iphdr *iph); |
5c0d2374 | 1217 | |
f11017ec | 1218 | struct ip_vs_conn *ip_vs_conn_out_get(const struct ip_vs_conn_param *p); |
1da177e4 | 1219 | |
0cf705c8 EB |
1220 | struct ip_vs_conn * ip_vs_conn_out_get_proto(struct netns_ipvs *ipvs, int af, |
1221 | const struct sk_buff *skb, | |
802c41ad | 1222 | const struct ip_vs_iphdr *iph); |
5c0d2374 | 1223 | |
088339a5 JA |
1224 | /* Get reference to gain full access to conn. |
1225 | * By default, RCU read-side critical sections have access only to | |
1226 | * conn fields and its PE data, see ip_vs_conn_rcu_free() for reference. | |
1227 | */ | |
1228 | static inline bool __ip_vs_conn_get(struct ip_vs_conn *cp) | |
1229 | { | |
b54ab92b | 1230 | return refcount_inc_not_zero(&cp->refcnt); |
088339a5 JA |
1231 | } |
1232 | ||
1da177e4 LT |
1233 | /* put back the conn without restarting its timer */ |
1234 | static inline void __ip_vs_conn_put(struct ip_vs_conn *cp) | |
1235 | { | |
4e857c58 | 1236 | smp_mb__before_atomic(); |
b54ab92b | 1237 | refcount_dec(&cp->refcnt); |
1da177e4 | 1238 | } |
5c3a0fd7 JP |
1239 | void ip_vs_conn_put(struct ip_vs_conn *cp); |
1240 | void ip_vs_conn_fill_cport(struct ip_vs_conn *cp, __be16 cport); | |
1da177e4 | 1241 | |
ba38528a | 1242 | struct ip_vs_conn *ip_vs_conn_new(const struct ip_vs_conn_param *p, int dest_af, |
f11017ec | 1243 | const union nf_inet_addr *daddr, |
95c96174 | 1244 | __be16 dport, unsigned int flags, |
0e051e68 | 1245 | struct ip_vs_dest *dest, __u32 fwmark); |
5c3a0fd7 | 1246 | void ip_vs_conn_expire_now(struct ip_vs_conn *cp); |
1da177e4 | 1247 | |
ec1b28ca | 1248 | const char *ip_vs_state_name(const struct ip_vs_conn *cp); |
1da177e4 | 1249 | |
69f39093 | 1250 | void ip_vs_tcp_conn_listen(struct ip_vs_conn *cp); |
3ec10d3a | 1251 | int ip_vs_check_template(struct ip_vs_conn *ct, struct ip_vs_dest *cdest); |
423b5595 | 1252 | void ip_vs_random_dropentry(struct netns_ipvs *ipvs); |
5c3a0fd7 JP |
1253 | int ip_vs_conn_init(void); |
1254 | void ip_vs_conn_cleanup(void); | |
1da177e4 LT |
1255 | |
1256 | static inline void ip_vs_control_del(struct ip_vs_conn *cp) | |
1257 | { | |
1258 | struct ip_vs_conn *ctl_cp = cp->control; | |
1259 | if (!ctl_cp) { | |
cfc78c5a JV |
1260 | IP_VS_ERR_BUF("request control DEL for uncontrolled: " |
1261 | "%s:%d to %s:%d\n", | |
1262 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1263 | ntohs(cp->cport), | |
1264 | IP_VS_DBG_ADDR(cp->af, &cp->vaddr), | |
1265 | ntohs(cp->vport)); | |
1266 | ||
1da177e4 LT |
1267 | return; |
1268 | } | |
1269 | ||
cfc78c5a JV |
1270 | IP_VS_DBG_BUF(7, "DELeting control for: " |
1271 | "cp.dst=%s:%d ctl_cp.dst=%s:%d\n", | |
1272 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1273 | ntohs(cp->cport), | |
1274 | IP_VS_DBG_ADDR(cp->af, &ctl_cp->caddr), | |
1275 | ntohs(ctl_cp->cport)); | |
1da177e4 LT |
1276 | |
1277 | cp->control = NULL; | |
1278 | if (atomic_read(&ctl_cp->n_control) == 0) { | |
cfc78c5a JV |
1279 | IP_VS_ERR_BUF("BUG control DEL with n=0 : " |
1280 | "%s:%d to %s:%d\n", | |
1281 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1282 | ntohs(cp->cport), | |
1283 | IP_VS_DBG_ADDR(cp->af, &cp->vaddr), | |
1284 | ntohs(cp->vport)); | |
1285 | ||
1da177e4 LT |
1286 | return; |
1287 | } | |
1288 | atomic_dec(&ctl_cp->n_control); | |
1289 | } | |
1290 | ||
1291 | static inline void | |
1292 | ip_vs_control_add(struct ip_vs_conn *cp, struct ip_vs_conn *ctl_cp) | |
1293 | { | |
1294 | if (cp->control) { | |
cfc78c5a JV |
1295 | IP_VS_ERR_BUF("request control ADD for already controlled: " |
1296 | "%s:%d to %s:%d\n", | |
1297 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1298 | ntohs(cp->cport), | |
1299 | IP_VS_DBG_ADDR(cp->af, &cp->vaddr), | |
1300 | ntohs(cp->vport)); | |
1301 | ||
1da177e4 LT |
1302 | ip_vs_control_del(cp); |
1303 | } | |
1304 | ||
cfc78c5a JV |
1305 | IP_VS_DBG_BUF(7, "ADDing control for: " |
1306 | "cp.dst=%s:%d ctl_cp.dst=%s:%d\n", | |
1307 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1308 | ntohs(cp->cport), | |
1309 | IP_VS_DBG_ADDR(cp->af, &ctl_cp->caddr), | |
1310 | ntohs(ctl_cp->cport)); | |
1da177e4 LT |
1311 | |
1312 | cp->control = ctl_cp; | |
1313 | atomic_inc(&ctl_cp->n_control); | |
1314 | } | |
1315 | ||
27541143 JA |
1316 | /* Mark our template as assured */ |
1317 | static inline void | |
1318 | ip_vs_control_assure_ct(struct ip_vs_conn *cp) | |
1319 | { | |
1320 | struct ip_vs_conn *ct = cp->control; | |
1321 | ||
1322 | if (ct && !(ct->state & IP_VS_CTPL_S_ASSURED) && | |
1323 | (ct->flags & IP_VS_CONN_F_TEMPLATE)) | |
1324 | ct->state |= IP_VS_CTPL_S_ASSURED; | |
1325 | } | |
1326 | ||
07dcc686 | 1327 | /* IPVS netns init & cleanup functions */ |
a4dd0360 | 1328 | int ip_vs_estimator_net_init(struct netns_ipvs *ipvs); |
3d993766 | 1329 | int ip_vs_control_net_init(struct netns_ipvs *ipvs); |
7d1f88ec | 1330 | int ip_vs_protocol_net_init(struct netns_ipvs *ipvs); |
b5dd212c | 1331 | int ip_vs_app_net_init(struct netns_ipvs *ipvs); |
2f3edc6a | 1332 | int ip_vs_conn_net_init(struct netns_ipvs *ipvs); |
802cb437 | 1333 | int ip_vs_sync_net_init(struct netns_ipvs *ipvs); |
2f3edc6a | 1334 | void ip_vs_conn_net_cleanup(struct netns_ipvs *ipvs); |
b5dd212c | 1335 | void ip_vs_app_net_cleanup(struct netns_ipvs *ipvs); |
7d1f88ec | 1336 | void ip_vs_protocol_net_cleanup(struct netns_ipvs *ipvs); |
3d993766 | 1337 | void ip_vs_control_net_cleanup(struct netns_ipvs *ipvs); |
a4dd0360 | 1338 | void ip_vs_estimator_net_cleanup(struct netns_ipvs *ipvs); |
ebea1f7c | 1339 | void ip_vs_sync_net_cleanup(struct netns_ipvs *ipvs); |
5d5a0815 | 1340 | void ip_vs_service_nets_cleanup(struct list_head *net_list); |
1da177e4 | 1341 | |
07dcc686 SH |
1342 | /* IPVS application functions |
1343 | * (from ip_vs_app.c) | |
1da177e4 LT |
1344 | */ |
1345 | #define IP_VS_APP_MAX_PORTS 8 | |
9f8128a5 EB |
1346 | struct ip_vs_app *register_ip_vs_app(struct netns_ipvs *ipvs, struct ip_vs_app *app); |
1347 | void unregister_ip_vs_app(struct netns_ipvs *ipvs, struct ip_vs_app *app); | |
5c3a0fd7 JP |
1348 | int ip_vs_bind_app(struct ip_vs_conn *cp, struct ip_vs_protocol *pp); |
1349 | void ip_vs_unbind_app(struct ip_vs_conn *cp); | |
3250dc9c | 1350 | int register_ip_vs_app_inc(struct netns_ipvs *ipvs, struct ip_vs_app *app, __u16 proto, |
5c3a0fd7 JP |
1351 | __u16 port); |
1352 | int ip_vs_app_inc_get(struct ip_vs_app *inc); | |
1353 | void ip_vs_app_inc_put(struct ip_vs_app *inc); | |
1354 | ||
d12e1229 JA |
1355 | int ip_vs_app_pkt_out(struct ip_vs_conn *, struct sk_buff *skb, |
1356 | struct ip_vs_iphdr *ipvsh); | |
1357 | int ip_vs_app_pkt_in(struct ip_vs_conn *, struct sk_buff *skb, | |
1358 | struct ip_vs_iphdr *ipvsh); | |
1da177e4 | 1359 | |
8be67a66 SH |
1360 | int register_ip_vs_pe(struct ip_vs_pe *pe); |
1361 | int unregister_ip_vs_pe(struct ip_vs_pe *pe); | |
e9e5eee8 | 1362 | struct ip_vs_pe *ip_vs_pe_getbyname(const char *name); |
fe5e7a1e | 1363 | struct ip_vs_pe *__ip_vs_pe_getbyname(const char *pe_name); |
e9e5eee8 | 1364 | |
07dcc686 | 1365 | /* Use a #define to avoid all of module.h just for these trivial ops */ |
69e7dae4 PG |
1366 | #define ip_vs_pe_get(pe) \ |
1367 | if (pe && pe->module) \ | |
e9e5eee8 | 1368 | __module_get(pe->module); |
e9e5eee8 | 1369 | |
69e7dae4 PG |
1370 | #define ip_vs_pe_put(pe) \ |
1371 | if (pe && pe->module) \ | |
e9e5eee8 | 1372 | module_put(pe->module); |
1da177e4 | 1373 | |
07dcc686 | 1374 | /* IPVS protocol functions (from ip_vs_proto.c) */ |
5c3a0fd7 JP |
1375 | int ip_vs_protocol_init(void); |
1376 | void ip_vs_protocol_cleanup(void); | |
1377 | void ip_vs_protocol_timeout_change(struct netns_ipvs *ipvs, int flags); | |
1378 | int *ip_vs_create_timeout_table(int *table, int size); | |
5c3a0fd7 JP |
1379 | void ip_vs_tcpudp_debug_packet(int af, struct ip_vs_protocol *pp, |
1380 | const struct sk_buff *skb, int offset, | |
1381 | const char *msg); | |
1da177e4 LT |
1382 | |
1383 | extern struct ip_vs_protocol ip_vs_protocol_tcp; | |
1384 | extern struct ip_vs_protocol ip_vs_protocol_udp; | |
1385 | extern struct ip_vs_protocol ip_vs_protocol_icmp; | |
1386 | extern struct ip_vs_protocol ip_vs_protocol_esp; | |
1387 | extern struct ip_vs_protocol ip_vs_protocol_ah; | |
2906f66a | 1388 | extern struct ip_vs_protocol ip_vs_protocol_sctp; |
1da177e4 | 1389 | |
07dcc686 SH |
1390 | /* Registering/unregistering scheduler functions |
1391 | * (from ip_vs_sched.c) | |
1da177e4 | 1392 | */ |
5c3a0fd7 JP |
1393 | int register_ip_vs_scheduler(struct ip_vs_scheduler *scheduler); |
1394 | int unregister_ip_vs_scheduler(struct ip_vs_scheduler *scheduler); | |
1395 | int ip_vs_bind_scheduler(struct ip_vs_service *svc, | |
1396 | struct ip_vs_scheduler *scheduler); | |
1397 | void ip_vs_unbind_scheduler(struct ip_vs_service *svc, | |
1398 | struct ip_vs_scheduler *sched); | |
1399 | struct ip_vs_scheduler *ip_vs_scheduler_get(const char *sched_name); | |
1400 | void ip_vs_scheduler_put(struct ip_vs_scheduler *scheduler); | |
1401 | struct ip_vs_conn * | |
190ecd27 | 1402 | ip_vs_schedule(struct ip_vs_service *svc, struct sk_buff *skb, |
d4383f04 JDB |
1403 | struct ip_vs_proto_data *pd, int *ignored, |
1404 | struct ip_vs_iphdr *iph); | |
5c3a0fd7 JP |
1405 | int ip_vs_leave(struct ip_vs_service *svc, struct sk_buff *skb, |
1406 | struct ip_vs_proto_data *pd, struct ip_vs_iphdr *iph); | |
1da177e4 | 1407 | |
5c3a0fd7 | 1408 | void ip_vs_scheduler_err(struct ip_vs_service *svc, const char *msg); |
41ac51ee | 1409 | |
07dcc686 | 1410 | /* IPVS control data and functions (from ip_vs_ctl.c) */ |
1da177e4 | 1411 | extern struct ip_vs_stats ip_vs_stats; |
b880c1f0 | 1412 | extern int sysctl_ip_vs_sync_ver; |
1da177e4 | 1413 | |
5c3a0fd7 | 1414 | struct ip_vs_service * |
0a4fd6ce | 1415 | ip_vs_service_find(struct netns_ipvs *ipvs, int af, __u32 fwmark, __u16 protocol, |
3c2e0505 | 1416 | const union nf_inet_addr *vaddr, __be16 vport); |
1da177e4 | 1417 | |
48aed1b0 | 1418 | bool ip_vs_has_real_service(struct netns_ipvs *ipvs, int af, __u16 protocol, |
5c3a0fd7 JP |
1419 | const union nf_inet_addr *daddr, __be16 dport); |
1420 | ||
39b97223 MA |
1421 | struct ip_vs_dest * |
1422 | ip_vs_find_real_service(struct netns_ipvs *ipvs, int af, __u16 protocol, | |
1423 | const union nf_inet_addr *daddr, __be16 dport); | |
2aa3c9f4 JA |
1424 | struct ip_vs_dest *ip_vs_find_tunnel(struct netns_ipvs *ipvs, int af, |
1425 | const union nf_inet_addr *daddr, | |
1426 | __be16 tun_port); | |
39b97223 | 1427 | |
5c3a0fd7 JP |
1428 | int ip_vs_use_count_inc(void); |
1429 | void ip_vs_use_count_dec(void); | |
1430 | int ip_vs_register_nl_ioctl(void); | |
1431 | void ip_vs_unregister_nl_ioctl(void); | |
1432 | int ip_vs_control_init(void); | |
1433 | void ip_vs_control_cleanup(void); | |
1434 | struct ip_vs_dest * | |
dc2add6f | 1435 | ip_vs_find_dest(struct netns_ipvs *ipvs, int svc_af, int dest_af, |
655eef10 AG |
1436 | const union nf_inet_addr *daddr, __be16 dport, |
1437 | const union nf_inet_addr *vaddr, __be16 vport, | |
52793dbe | 1438 | __u16 protocol, __u32 fwmark, __u32 flags); |
5c3a0fd7 | 1439 | void ip_vs_try_bind_dest(struct ip_vs_conn *cp); |
1da177e4 | 1440 | |
fca9c20a JA |
1441 | static inline void ip_vs_dest_hold(struct ip_vs_dest *dest) |
1442 | { | |
b54ab92b | 1443 | refcount_inc(&dest->refcnt); |
fca9c20a JA |
1444 | } |
1445 | ||
1446 | static inline void ip_vs_dest_put(struct ip_vs_dest *dest) | |
1447 | { | |
4e857c58 | 1448 | smp_mb__before_atomic(); |
b54ab92b | 1449 | refcount_dec(&dest->refcnt); |
fca9c20a | 1450 | } |
1da177e4 | 1451 | |
9e4e948a JA |
1452 | static inline void ip_vs_dest_put_and_free(struct ip_vs_dest *dest) |
1453 | { | |
b54ab92b | 1454 | if (refcount_dec_and_test(&dest->refcnt)) |
9e4e948a JA |
1455 | kfree(dest); |
1456 | } | |
1457 | ||
07dcc686 SH |
1458 | /* IPVS sync daemon data and function prototypes |
1459 | * (from ip_vs_sync.c) | |
1da177e4 | 1460 | */ |
6ac121d7 | 1461 | int start_sync_thread(struct netns_ipvs *ipvs, struct ipvs_sync_daemon_cfg *cfg, |
e4ff6751 | 1462 | int state); |
b3cf3cbf | 1463 | int stop_sync_thread(struct netns_ipvs *ipvs, int state); |
b61a8c1a | 1464 | void ip_vs_sync_conn(struct netns_ipvs *ipvs, struct ip_vs_conn *cp, int pkts); |
1da177e4 | 1465 | |
07dcc686 | 1466 | /* IPVS rate estimator prototypes (from ip_vs_est.c) */ |
0f34d54b EB |
1467 | void ip_vs_start_estimator(struct netns_ipvs *ipvs, struct ip_vs_stats *stats); |
1468 | void ip_vs_stop_estimator(struct netns_ipvs *ipvs, struct ip_vs_stats *stats); | |
5c3a0fd7 | 1469 | void ip_vs_zero_estimator(struct ip_vs_stats *stats); |
cd67cd5e | 1470 | void ip_vs_read_estimator(struct ip_vs_kstats *dst, struct ip_vs_stats *stats); |
1da177e4 | 1471 | |
07dcc686 | 1472 | /* Various IPVS packet transmitters (from ip_vs_xmit.c) */ |
5c3a0fd7 JP |
1473 | int ip_vs_null_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, |
1474 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1475 | int ip_vs_bypass_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1476 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1477 | int ip_vs_nat_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1478 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1479 | int ip_vs_tunnel_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1480 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1481 | int ip_vs_dr_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1482 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1483 | int ip_vs_icmp_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1484 | struct ip_vs_protocol *pp, int offset, | |
1485 | unsigned int hooknum, struct ip_vs_iphdr *iph); | |
1486 | void ip_vs_dest_dst_rcu_free(struct rcu_head *head); | |
1da177e4 | 1487 | |
b3cdd2a7 | 1488 | #ifdef CONFIG_IP_VS_IPV6 |
5c3a0fd7 JP |
1489 | int ip_vs_bypass_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, |
1490 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1491 | int ip_vs_nat_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1492 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1493 | int ip_vs_tunnel_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1494 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1495 | int ip_vs_dr_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1496 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1497 | int ip_vs_icmp_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1498 | struct ip_vs_protocol *pp, int offset, | |
1499 | unsigned int hooknum, struct ip_vs_iphdr *iph); | |
b3cdd2a7 | 1500 | #endif |
1da177e4 | 1501 | |
3a1bbf18 | 1502 | #ifdef CONFIG_SYSCTL |
07dcc686 SH |
1503 | /* This is a simple mechanism to ignore packets when |
1504 | * we are loaded. Just set ip_vs_drop_rate to 'n' and | |
1505 | * we start to drop 1/rate of the packets | |
1da177e4 | 1506 | */ |
a0840e2e | 1507 | static inline int ip_vs_todrop(struct netns_ipvs *ipvs) |
1da177e4 | 1508 | { |
a0840e2e HS |
1509 | if (!ipvs->drop_rate) |
1510 | return 0; | |
1511 | if (--ipvs->drop_counter > 0) | |
1512 | return 0; | |
1513 | ipvs->drop_counter = ipvs->drop_rate; | |
1da177e4 LT |
1514 | return 1; |
1515 | } | |
3a1bbf18 SH |
1516 | #else |
1517 | static inline int ip_vs_todrop(struct netns_ipvs *ipvs) { return 0; } | |
1518 | #endif | |
1da177e4 | 1519 | |
35dfb013 ASK |
1520 | #ifdef CONFIG_SYSCTL |
1521 | /* Enqueue delayed work for expiring no dest connections | |
1522 | * Only run when sysctl_expire_nodest=1 | |
1523 | */ | |
1524 | static inline void ip_vs_enqueue_expire_nodest_conns(struct netns_ipvs *ipvs) | |
1525 | { | |
1526 | if (sysctl_expire_nodest_conn(ipvs)) | |
1527 | queue_delayed_work(system_long_wq, | |
1528 | &ipvs->expire_nodest_conn_work, 1); | |
1529 | } | |
1530 | ||
1531 | void ip_vs_expire_nodest_conn_flush(struct netns_ipvs *ipvs); | |
1532 | #else | |
1533 | static inline void ip_vs_enqueue_expire_nodest_conns(struct netns_ipvs *ipvs) {} | |
1534 | #endif | |
1535 | ||
1da40ab6 JA |
1536 | #define IP_VS_DFWD_METHOD(dest) (atomic_read(&(dest)->conn_flags) & \ |
1537 | IP_VS_CONN_F_FWD_MASK) | |
1538 | ||
07dcc686 | 1539 | /* ip_vs_fwd_tag returns the forwarding tag of the connection */ |
1da177e4 LT |
1540 | #define IP_VS_FWD_METHOD(cp) (cp->flags & IP_VS_CONN_F_FWD_MASK) |
1541 | ||
732db659 | 1542 | static inline char ip_vs_fwd_tag(struct ip_vs_conn *cp) |
1da177e4 LT |
1543 | { |
1544 | char fwd; | |
1545 | ||
1546 | switch (IP_VS_FWD_METHOD(cp)) { | |
1547 | case IP_VS_CONN_F_MASQ: | |
1548 | fwd = 'M'; break; | |
1549 | case IP_VS_CONN_F_LOCALNODE: | |
1550 | fwd = 'L'; break; | |
1551 | case IP_VS_CONN_F_TUNNEL: | |
1552 | fwd = 'T'; break; | |
1553 | case IP_VS_CONN_F_DROUTE: | |
1554 | fwd = 'R'; break; | |
1555 | case IP_VS_CONN_F_BYPASS: | |
1556 | fwd = 'B'; break; | |
1557 | default: | |
1558 | fwd = '?'; break; | |
1559 | } | |
1560 | return fwd; | |
1561 | } | |
1562 | ||
5c3a0fd7 JP |
1563 | void ip_vs_nat_icmp(struct sk_buff *skb, struct ip_vs_protocol *pp, |
1564 | struct ip_vs_conn *cp, int dir); | |
b3cdd2a7 JV |
1565 | |
1566 | #ifdef CONFIG_IP_VS_IPV6 | |
5c3a0fd7 JP |
1567 | void ip_vs_nat_icmp_v6(struct sk_buff *skb, struct ip_vs_protocol *pp, |
1568 | struct ip_vs_conn *cp, int dir); | |
b3cdd2a7 | 1569 | #endif |
1da177e4 | 1570 | |
5c3a0fd7 | 1571 | __sum16 ip_vs_checksum_complete(struct sk_buff *skb, int offset); |
1da177e4 | 1572 | |
f9214b26 | 1573 | static inline __wsum ip_vs_check_diff4(__be32 old, __be32 new, __wsum oldsum) |
1da177e4 | 1574 | { |
f9214b26 | 1575 | __be32 diff[2] = { ~old, new }; |
1da177e4 | 1576 | |
07f0757a | 1577 | return csum_partial(diff, sizeof(diff), oldsum); |
f9214b26 AV |
1578 | } |
1579 | ||
0bbdd42b JV |
1580 | #ifdef CONFIG_IP_VS_IPV6 |
1581 | static inline __wsum ip_vs_check_diff16(const __be32 *old, const __be32 *new, | |
1582 | __wsum oldsum) | |
1583 | { | |
1584 | __be32 diff[8] = { ~old[3], ~old[2], ~old[1], ~old[0], | |
1585 | new[3], new[2], new[1], new[0] }; | |
1586 | ||
07f0757a | 1587 | return csum_partial(diff, sizeof(diff), oldsum); |
0bbdd42b JV |
1588 | } |
1589 | #endif | |
1590 | ||
f9214b26 AV |
1591 | static inline __wsum ip_vs_check_diff2(__be16 old, __be16 new, __wsum oldsum) |
1592 | { | |
1593 | __be16 diff[2] = { ~old, new }; | |
1594 | ||
07f0757a | 1595 | return csum_partial(diff, sizeof(diff), oldsum); |
1da177e4 LT |
1596 | } |
1597 | ||
07dcc686 | 1598 | /* Forget current conntrack (unconfirmed) and attach notrack entry */ |
cf356d69 JA |
1599 | static inline void ip_vs_notrack(struct sk_buff *skb) |
1600 | { | |
1601 | #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) | |
1602 | enum ip_conntrack_info ctinfo; | |
06b69390 | 1603 | struct nf_conn *ct = nf_ct_get(skb, &ctinfo); |
cf356d69 | 1604 | |
ab8bc7ed | 1605 | if (ct) { |
97a6ad13 | 1606 | nf_conntrack_put(&ct->ct_general); |
cc41c84b | 1607 | nf_ct_set(skb, NULL, IP_CT_UNTRACKED); |
cf356d69 JA |
1608 | } |
1609 | #endif | |
1610 | } | |
1611 | ||
f4bc17cd | 1612 | #ifdef CONFIG_IP_VS_NFCT |
07dcc686 SH |
1613 | /* Netfilter connection tracking |
1614 | * (from ip_vs_nfct.c) | |
f4bc17cd | 1615 | */ |
a0840e2e | 1616 | static inline int ip_vs_conntrack_enabled(struct netns_ipvs *ipvs) |
f4bc17cd | 1617 | { |
a4e2f5a7 | 1618 | #ifdef CONFIG_SYSCTL |
a0840e2e | 1619 | return ipvs->sysctl_conntrack; |
a4e2f5a7 SH |
1620 | #else |
1621 | return 0; | |
1622 | #endif | |
f4bc17cd JA |
1623 | } |
1624 | ||
5c3a0fd7 JP |
1625 | void ip_vs_update_conntrack(struct sk_buff *skb, struct ip_vs_conn *cp, |
1626 | int outin); | |
1627 | int ip_vs_confirm_conntrack(struct sk_buff *skb); | |
1628 | void ip_vs_nfct_expect_related(struct sk_buff *skb, struct nf_conn *ct, | |
1629 | struct ip_vs_conn *cp, u_int8_t proto, | |
1630 | const __be16 port, int from_rs); | |
1631 | void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp); | |
f4bc17cd JA |
1632 | |
1633 | #else | |
1634 | ||
a0840e2e | 1635 | static inline int ip_vs_conntrack_enabled(struct netns_ipvs *ipvs) |
f4bc17cd JA |
1636 | { |
1637 | return 0; | |
1638 | } | |
1639 | ||
1640 | static inline void ip_vs_update_conntrack(struct sk_buff *skb, | |
1641 | struct ip_vs_conn *cp, int outin) | |
1642 | { | |
1643 | } | |
1644 | ||
e23ebf0f | 1645 | static inline int ip_vs_confirm_conntrack(struct sk_buff *skb) |
f4bc17cd JA |
1646 | { |
1647 | return NF_ACCEPT; | |
1648 | } | |
1649 | ||
1650 | static inline void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp) | |
1651 | { | |
1652 | } | |
07dcc686 | 1653 | #endif /* CONFIG_IP_VS_NFCT */ |
6523ce15 | 1654 | |
f0a5e4d7 JA |
1655 | /* Using old conntrack that can not be redirected to another real server? */ |
1656 | static inline bool ip_vs_conn_uses_old_conntrack(struct ip_vs_conn *cp, | |
1657 | struct sk_buff *skb) | |
f719e375 JA |
1658 | { |
1659 | #ifdef CONFIG_IP_VS_NFCT | |
1660 | enum ip_conntrack_info ctinfo; | |
1661 | struct nf_conn *ct; | |
1662 | ||
f719e375 | 1663 | ct = nf_ct_get(skb, &ctinfo); |
f0a5e4d7 | 1664 | if (ct && nf_ct_is_confirmed(ct)) |
f719e375 JA |
1665 | return true; |
1666 | #endif | |
1667 | return false; | |
1668 | } | |
1669 | ||
31875d49 JA |
1670 | static inline int ip_vs_register_conntrack(struct ip_vs_service *svc) |
1671 | { | |
1672 | #if IS_ENABLED(CONFIG_NF_CONNTRACK) | |
1673 | int afmask = (svc->af == AF_INET6) ? 2 : 1; | |
1674 | int ret = 0; | |
1675 | ||
1676 | if (!(svc->conntrack_afmask & afmask)) { | |
1677 | ret = nf_ct_netns_get(svc->ipvs->net, svc->af); | |
1678 | if (ret >= 0) | |
1679 | svc->conntrack_afmask |= afmask; | |
1680 | } | |
1681 | return ret; | |
1682 | #else | |
1683 | return 0; | |
1684 | #endif | |
1685 | } | |
1686 | ||
1687 | static inline void ip_vs_unregister_conntrack(struct ip_vs_service *svc) | |
1688 | { | |
1689 | #if IS_ENABLED(CONFIG_NF_CONNTRACK) | |
1690 | int afmask = (svc->af == AF_INET6) ? 2 : 1; | |
1691 | ||
1692 | if (svc->conntrack_afmask & afmask) { | |
1693 | nf_ct_netns_put(svc->ipvs->net, svc->af); | |
1694 | svc->conntrack_afmask &= ~afmask; | |
1695 | } | |
1696 | #endif | |
1697 | } | |
1698 | ||
857ca897 JA |
1699 | int ip_vs_register_hooks(struct netns_ipvs *ipvs, unsigned int af); |
1700 | void ip_vs_unregister_hooks(struct netns_ipvs *ipvs, unsigned int af); | |
1701 | ||
c16526a7 | 1702 | static inline int |
b552f7e3 CG |
1703 | ip_vs_dest_conn_overhead(struct ip_vs_dest *dest) |
1704 | { | |
07dcc686 | 1705 | /* We think the overhead of processing active connections is 256 |
b552f7e3 CG |
1706 | * times higher than that of inactive connections in average. (This |
1707 | * 256 times might not be accurate, we will change it later) We | |
1708 | * use the following formula to estimate the overhead now: | |
1709 | * dest->activeconns*256 + dest->inactconns | |
1710 | */ | |
1711 | return (atomic_read(&dest->activeconns) << 8) + | |
1712 | atomic_read(&dest->inactconns); | |
1713 | } | |
1714 | ||
bc4768eb | 1715 | #endif /* _NET_IP_VS_H */ |