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 | 31 | #include <net/net_namespace.h> /* Netw namespace */ |
f0be83d5 | 32 | #include <linux/sched/isolation.h> |
61b1ab45 | 33 | |
4fd9beef AG |
34 | #define IP_VS_HDR_INVERSE 1 |
35 | #define IP_VS_HDR_ICMP 2 | |
36 | ||
07dcc686 | 37 | /* Generic access of ipvs struct */ |
61b1ab45 HS |
38 | static inline struct netns_ipvs *net_ipvs(struct net* net) |
39 | { | |
40 | return net->ipvs; | |
41 | } | |
07dcc686 | 42 | |
6f7edb48 CB |
43 | /* Connections' size value needed by ip_vs_ctl.c */ |
44 | extern int ip_vs_conn_tab_size; | |
45 | ||
705dd344 JA |
46 | extern struct mutex __ip_vs_mutex; |
47 | ||
64aae3cb | 48 | struct ip_vs_iphdr { |
4fd9beef | 49 | int hdr_flags; /* ipvs flags */ |
b0e010c5 | 50 | __u32 off; /* Where IP or IPv4 header starts */ |
63dca2c0 | 51 | __u32 len; /* IPv4 simply where L4 starts |
07dcc686 | 52 | * IPv6 where L4 Transport Header starts */ |
63dca2c0 JDB |
53 | __u16 fragoffs; /* IPv6 fragment offset, 0 if first frag (or not frag)*/ |
54 | __s16 protocol; | |
55 | __s32 flags; | |
64aae3cb JV |
56 | union nf_inet_addr saddr; |
57 | union nf_inet_addr daddr; | |
58 | }; | |
59 | ||
2f74713d | 60 | static inline void *frag_safe_skb_hp(const struct sk_buff *skb, int offset, |
6b3d9330 | 61 | int len, void *buffer) |
2f74713d JDB |
62 | { |
63 | return skb_header_pointer(skb, offset, len, buffer); | |
64 | } | |
2f74713d | 65 | |
63dca2c0 JDB |
66 | /* This function handles filling *ip_vs_iphdr, both for IPv4 and IPv6. |
67 | * IPv6 requires some extra work, as finding proper header position, | |
68 | * depend on the IPv6 extension headers. | |
69 | */ | |
b0e010c5 AG |
70 | static inline int |
71 | ip_vs_fill_iph_skb_off(int af, const struct sk_buff *skb, int offset, | |
4fd9beef | 72 | int hdr_flags, struct ip_vs_iphdr *iphdr) |
64aae3cb | 73 | { |
4fd9beef | 74 | iphdr->hdr_flags = hdr_flags; |
b0e010c5 | 75 | iphdr->off = offset; |
4fd9beef | 76 | |
64aae3cb JV |
77 | #ifdef CONFIG_IP_VS_IPV6 |
78 | if (af == AF_INET6) { | |
b0e010c5 AG |
79 | struct ipv6hdr _iph; |
80 | const struct ipv6hdr *iph = skb_header_pointer( | |
81 | skb, offset, sizeof(_iph), &_iph); | |
82 | if (!iph) | |
83 | return 0; | |
84 | ||
4e3fd7a0 AD |
85 | iphdr->saddr.in6 = iph->saddr; |
86 | iphdr->daddr.in6 = iph->daddr; | |
6aafeef0 | 87 | /* ipv6_find_hdr() updates len, flags */ |
b0e010c5 | 88 | iphdr->len = offset; |
63dca2c0 JDB |
89 | iphdr->flags = 0; |
90 | iphdr->protocol = ipv6_find_hdr(skb, &iphdr->len, -1, | |
91 | &iphdr->fragoffs, | |
92 | &iphdr->flags); | |
b0e010c5 AG |
93 | if (iphdr->protocol < 0) |
94 | return 0; | |
64aae3cb JV |
95 | } else |
96 | #endif | |
97 | { | |
b0e010c5 AG |
98 | struct iphdr _iph; |
99 | const struct iphdr *iph = skb_header_pointer( | |
100 | skb, offset, sizeof(_iph), &_iph); | |
101 | if (!iph) | |
102 | return 0; | |
103 | ||
104 | iphdr->len = offset + iph->ihl * 4; | |
63dca2c0 JDB |
105 | iphdr->fragoffs = 0; |
106 | iphdr->protocol = iph->protocol; | |
107 | iphdr->saddr.ip = iph->saddr; | |
108 | iphdr->daddr.ip = iph->daddr; | |
109 | } | |
b0e010c5 AG |
110 | |
111 | return 1; | |
112 | } | |
113 | ||
114 | static inline int | |
4fd9beef AG |
115 | ip_vs_fill_iph_skb_icmp(int af, const struct sk_buff *skb, int offset, |
116 | bool inverse, struct ip_vs_iphdr *iphdr) | |
117 | { | |
118 | int hdr_flags = IP_VS_HDR_ICMP; | |
119 | ||
120 | if (inverse) | |
121 | hdr_flags |= IP_VS_HDR_INVERSE; | |
122 | ||
123 | return ip_vs_fill_iph_skb_off(af, skb, offset, hdr_flags, iphdr); | |
124 | } | |
125 | ||
126 | static inline int | |
127 | ip_vs_fill_iph_skb(int af, const struct sk_buff *skb, bool inverse, | |
128 | struct ip_vs_iphdr *iphdr) | |
129 | { | |
130 | int hdr_flags = 0; | |
131 | ||
132 | if (inverse) | |
133 | hdr_flags |= IP_VS_HDR_INVERSE; | |
134 | ||
135 | return ip_vs_fill_iph_skb_off(af, skb, skb_network_offset(skb), | |
136 | hdr_flags, iphdr); | |
137 | } | |
138 | ||
139 | static inline bool | |
140 | ip_vs_iph_inverse(const struct ip_vs_iphdr *iph) | |
141 | { | |
142 | return !!(iph->hdr_flags & IP_VS_HDR_INVERSE); | |
143 | } | |
144 | ||
145 | static inline bool | |
146 | ip_vs_iph_icmp(const struct ip_vs_iphdr *iph) | |
b0e010c5 | 147 | { |
4fd9beef | 148 | return !!(iph->hdr_flags & IP_VS_HDR_ICMP); |
63dca2c0 JDB |
149 | } |
150 | ||
64aae3cb JV |
151 | static inline void ip_vs_addr_copy(int af, union nf_inet_addr *dst, |
152 | const union nf_inet_addr *src) | |
153 | { | |
154 | #ifdef CONFIG_IP_VS_IPV6 | |
155 | if (af == AF_INET6) | |
4e3fd7a0 | 156 | dst->in6 = src->in6; |
64aae3cb JV |
157 | else |
158 | #endif | |
159 | dst->ip = src->ip; | |
160 | } | |
161 | ||
9a05475c JA |
162 | static inline void ip_vs_addr_set(int af, union nf_inet_addr *dst, |
163 | const union nf_inet_addr *src) | |
164 | { | |
165 | #ifdef CONFIG_IP_VS_IPV6 | |
166 | if (af == AF_INET6) { | |
167 | dst->in6 = src->in6; | |
168 | return; | |
169 | } | |
170 | #endif | |
171 | dst->ip = src->ip; | |
172 | dst->all[1] = 0; | |
173 | dst->all[2] = 0; | |
174 | dst->all[3] = 0; | |
175 | } | |
176 | ||
64aae3cb JV |
177 | static inline int ip_vs_addr_equal(int af, const union nf_inet_addr *a, |
178 | const union nf_inet_addr *b) | |
179 | { | |
180 | #ifdef CONFIG_IP_VS_IPV6 | |
181 | if (af == AF_INET6) | |
182 | return ipv6_addr_equal(&a->in6, &b->in6); | |
183 | #endif | |
184 | return a->ip == b->ip; | |
185 | } | |
186 | ||
1da177e4 | 187 | #ifdef CONFIG_IP_VS_DEBUG |
14c85021 ACM |
188 | #include <linux/net.h> |
189 | ||
5c3a0fd7 | 190 | int ip_vs_get_debug_level(void); |
c842a3ad JV |
191 | |
192 | static inline const char *ip_vs_dbg_addr(int af, char *buf, size_t buf_len, | |
193 | const union nf_inet_addr *addr, | |
194 | int *idx) | |
195 | { | |
196 | int len; | |
197 | #ifdef CONFIG_IP_VS_IPV6 | |
198 | if (af == AF_INET6) | |
120b9c14 | 199 | len = snprintf(&buf[*idx], buf_len - *idx, "[%pI6c]", |
0c6ce78a | 200 | &addr->in6) + 1; |
c842a3ad JV |
201 | else |
202 | #endif | |
3685f25d HH |
203 | len = snprintf(&buf[*idx], buf_len - *idx, "%pI4", |
204 | &addr->ip) + 1; | |
c842a3ad JV |
205 | |
206 | *idx += len; | |
207 | BUG_ON(*idx > buf_len + 1); | |
208 | return &buf[*idx - len]; | |
209 | } | |
210 | ||
9aada7ac HE |
211 | #define IP_VS_DBG_BUF(level, msg, ...) \ |
212 | do { \ | |
213 | char ip_vs_dbg_buf[160]; \ | |
214 | int ip_vs_dbg_idx = 0; \ | |
215 | if (level <= ip_vs_get_debug_level()) \ | |
216 | printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ | |
217 | } while (0) | |
218 | #define IP_VS_ERR_BUF(msg...) \ | |
219 | do { \ | |
220 | char ip_vs_dbg_buf[160]; \ | |
221 | int ip_vs_dbg_idx = 0; \ | |
222 | pr_err(msg); \ | |
223 | } while (0) | |
c842a3ad JV |
224 | |
225 | /* Only use from within IP_VS_DBG_BUF() or IP_VS_ERR_BUF macros */ | |
9aada7ac HE |
226 | #define IP_VS_DBG_ADDR(af, addr) \ |
227 | ip_vs_dbg_addr(af, ip_vs_dbg_buf, \ | |
228 | sizeof(ip_vs_dbg_buf), addr, \ | |
229 | &ip_vs_dbg_idx) | |
230 | ||
231 | #define IP_VS_DBG(level, msg, ...) \ | |
232 | do { \ | |
233 | if (level <= ip_vs_get_debug_level()) \ | |
234 | printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ | |
235 | } while (0) | |
236 | #define IP_VS_DBG_RL(msg, ...) \ | |
237 | do { \ | |
238 | if (net_ratelimit()) \ | |
239 | printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ | |
240 | } while (0) | |
0d79641a | 241 | #define IP_VS_DBG_PKT(level, af, pp, skb, ofs, msg) \ |
9aada7ac HE |
242 | do { \ |
243 | if (level <= ip_vs_get_debug_level()) \ | |
0d79641a | 244 | pp->debug_packet(af, pp, skb, ofs, msg); \ |
9aada7ac | 245 | } while (0) |
0d79641a | 246 | #define IP_VS_DBG_RL_PKT(level, af, pp, skb, ofs, msg) \ |
9aada7ac HE |
247 | do { \ |
248 | if (level <= ip_vs_get_debug_level() && \ | |
249 | net_ratelimit()) \ | |
0d79641a | 250 | pp->debug_packet(af, pp, skb, ofs, msg); \ |
9aada7ac | 251 | } while (0) |
1da177e4 | 252 | #else /* NO DEBUGGING at ALL */ |
c842a3ad JV |
253 | #define IP_VS_DBG_BUF(level, msg...) do {} while (0) |
254 | #define IP_VS_ERR_BUF(msg...) do {} while (0) | |
1da177e4 LT |
255 | #define IP_VS_DBG(level, msg...) do {} while (0) |
256 | #define IP_VS_DBG_RL(msg...) do {} while (0) | |
0d79641a JA |
257 | #define IP_VS_DBG_PKT(level, af, pp, skb, ofs, msg) do {} while (0) |
258 | #define IP_VS_DBG_RL_PKT(level, af, pp, skb, ofs, msg) do {} while (0) | |
1da177e4 LT |
259 | #endif |
260 | ||
261 | #define IP_VS_BUG() BUG() | |
1e3e238e | 262 | #define IP_VS_ERR_RL(msg, ...) \ |
9aada7ac HE |
263 | do { \ |
264 | if (net_ratelimit()) \ | |
1e3e238e | 265 | pr_err(msg, ##__VA_ARGS__); \ |
9aada7ac | 266 | } while (0) |
1da177e4 | 267 | |
07dcc686 | 268 | /* The port number of FTP service (in network order). */ |
f3a7c66b HH |
269 | #define FTPPORT cpu_to_be16(21) |
270 | #define FTPDATA cpu_to_be16(20) | |
1da177e4 | 271 | |
07dcc686 | 272 | /* TCP State Values */ |
1da177e4 LT |
273 | enum { |
274 | IP_VS_TCP_S_NONE = 0, | |
275 | IP_VS_TCP_S_ESTABLISHED, | |
276 | IP_VS_TCP_S_SYN_SENT, | |
277 | IP_VS_TCP_S_SYN_RECV, | |
278 | IP_VS_TCP_S_FIN_WAIT, | |
279 | IP_VS_TCP_S_TIME_WAIT, | |
280 | IP_VS_TCP_S_CLOSE, | |
281 | IP_VS_TCP_S_CLOSE_WAIT, | |
282 | IP_VS_TCP_S_LAST_ACK, | |
283 | IP_VS_TCP_S_LISTEN, | |
284 | IP_VS_TCP_S_SYNACK, | |
285 | IP_VS_TCP_S_LAST | |
286 | }; | |
287 | ||
07dcc686 | 288 | /* UDP State Values */ |
1da177e4 LT |
289 | enum { |
290 | IP_VS_UDP_S_NORMAL, | |
291 | IP_VS_UDP_S_LAST, | |
292 | }; | |
293 | ||
07dcc686 | 294 | /* ICMP State Values */ |
1da177e4 LT |
295 | enum { |
296 | IP_VS_ICMP_S_NORMAL, | |
297 | IP_VS_ICMP_S_LAST, | |
298 | }; | |
299 | ||
07dcc686 | 300 | /* SCTP State Values */ |
2906f66a VMR |
301 | enum ip_vs_sctp_states { |
302 | IP_VS_SCTP_S_NONE, | |
61e7c420 JA |
303 | IP_VS_SCTP_S_INIT1, |
304 | IP_VS_SCTP_S_INIT, | |
305 | IP_VS_SCTP_S_COOKIE_SENT, | |
306 | IP_VS_SCTP_S_COOKIE_REPLIED, | |
307 | IP_VS_SCTP_S_COOKIE_WAIT, | |
308 | IP_VS_SCTP_S_COOKIE, | |
309 | IP_VS_SCTP_S_COOKIE_ECHOED, | |
2906f66a | 310 | IP_VS_SCTP_S_ESTABLISHED, |
61e7c420 JA |
311 | IP_VS_SCTP_S_SHUTDOWN_SENT, |
312 | IP_VS_SCTP_S_SHUTDOWN_RECEIVED, | |
313 | IP_VS_SCTP_S_SHUTDOWN_ACK_SENT, | |
314 | IP_VS_SCTP_S_REJECTED, | |
2906f66a VMR |
315 | IP_VS_SCTP_S_CLOSED, |
316 | IP_VS_SCTP_S_LAST | |
317 | }; | |
318 | ||
27541143 JA |
319 | /* Connection templates use bits from state */ |
320 | #define IP_VS_CTPL_S_NONE 0x0000 | |
321 | #define IP_VS_CTPL_S_ASSURED 0x0001 | |
322 | #define IP_VS_CTPL_S_LAST 0x0002 | |
323 | ||
07dcc686 SH |
324 | /* Delta sequence info structure |
325 | * Each ip_vs_conn has 2 (output AND input seq. changes). | |
326 | * Only used in the VS/NAT. | |
1da177e4 LT |
327 | */ |
328 | struct ip_vs_seq { | |
329 | __u32 init_seq; /* Add delta from this seq */ | |
330 | __u32 delta; /* Delta in sequence numbers */ | |
331 | __u32 previous_delta; /* Delta in sequence numbers | |
07dcc686 | 332 | * before last resized pkt */ |
1da177e4 LT |
333 | }; |
334 | ||
07dcc686 | 335 | /* counters per cpu */ |
b17fc996 | 336 | struct ip_vs_counters { |
1dbd8d9a JA |
337 | u64_stats_t conns; /* connections scheduled */ |
338 | u64_stats_t inpkts; /* incoming packets */ | |
339 | u64_stats_t outpkts; /* outgoing packets */ | |
340 | u64_stats_t inbytes; /* incoming bytes */ | |
341 | u64_stats_t outbytes; /* outgoing bytes */ | |
b17fc996 | 342 | }; |
07dcc686 | 343 | /* Stats per cpu */ |
b17fc996 | 344 | struct ip_vs_cpu_stats { |
cd67cd5e | 345 | struct ip_vs_counters cnt; |
b17fc996 HS |
346 | struct u64_stats_sync syncp; |
347 | }; | |
1da177e4 | 348 | |
f0be83d5 JA |
349 | /* Default nice for estimator kthreads */ |
350 | #define IPVS_EST_NICE 0 | |
351 | ||
07dcc686 | 352 | /* IPVS statistics objects */ |
3a14a313 | 353 | struct ip_vs_estimator { |
705dd344 | 354 | struct hlist_node list; |
3a14a313 SW |
355 | |
356 | u64 last_inbytes; | |
357 | u64 last_outbytes; | |
cd67cd5e JA |
358 | u64 last_conns; |
359 | u64 last_inpkts; | |
360 | u64 last_outpkts; | |
361 | ||
362 | u64 cps; | |
363 | u64 inpps; | |
364 | u64 outpps; | |
365 | u64 inbps; | |
366 | u64 outbps; | |
705dd344 JA |
367 | |
368 | s32 ktid:16, /* kthread ID, -1=temp list */ | |
369 | ktrow:8, /* row/tick ID for kthread */ | |
370 | ktcid:8; /* chain ID for kthread tick */ | |
cd67cd5e JA |
371 | }; |
372 | ||
373 | /* | |
374 | * IPVS statistics object, 64-bit kernel version of struct ip_vs_stats_user | |
375 | */ | |
376 | struct ip_vs_kstats { | |
377 | u64 conns; /* connections scheduled */ | |
378 | u64 inpkts; /* incoming packets */ | |
379 | u64 outpkts; /* outgoing packets */ | |
380 | u64 inbytes; /* incoming bytes */ | |
381 | u64 outbytes; /* outgoing bytes */ | |
382 | ||
383 | u64 cps; /* current connection rate */ | |
384 | u64 inpps; /* current in packet rate */ | |
385 | u64 outpps; /* current out packet rate */ | |
386 | u64 inbps; /* current in byte rate */ | |
387 | u64 outbps; /* current out byte rate */ | |
3a14a313 SW |
388 | }; |
389 | ||
fd2c3ef7 | 390 | struct ip_vs_stats { |
cd67cd5e | 391 | struct ip_vs_kstats kstats; /* kernel statistics */ |
e9c0ce23 | 392 | struct ip_vs_estimator est; /* estimator */ |
b962abdc | 393 | struct ip_vs_cpu_stats __percpu *cpustats; /* per cpu counters */ |
b17fc996 | 394 | spinlock_t lock; /* spin lock */ |
cd67cd5e | 395 | struct ip_vs_kstats kstats0; /* reset values */ |
1da177e4 LT |
396 | }; |
397 | ||
5df7d714 JA |
398 | struct ip_vs_stats_rcu { |
399 | struct ip_vs_stats s; | |
400 | struct rcu_head rcu_head; | |
401 | }; | |
402 | ||
de39afb3 JA |
403 | int ip_vs_stats_init_alloc(struct ip_vs_stats *s); |
404 | struct ip_vs_stats *ip_vs_stats_alloc(void); | |
405 | void ip_vs_stats_release(struct ip_vs_stats *stats); | |
406 | void ip_vs_stats_free(struct ip_vs_stats *stats); | |
407 | ||
705dd344 JA |
408 | /* Process estimators in multiple timer ticks (20/50/100, see ktrow) */ |
409 | #define IPVS_EST_NTICKS 50 | |
410 | /* Estimation uses a 2-second period containing ticks (in jiffies) */ | |
411 | #define IPVS_EST_TICK ((2 * HZ) / IPVS_EST_NTICKS) | |
412 | ||
413 | /* Limit of CPU load per kthread (8 for 12.5%), ratio of CPU capacity (1/C). | |
414 | * Value of 4 and above ensures kthreads will take work without exceeding | |
415 | * the CPU capacity under different circumstances. | |
416 | */ | |
417 | #define IPVS_EST_LOAD_DIVISOR 8 | |
418 | ||
419 | /* Kthreads should not have work that exceeds the CPU load above 50% */ | |
420 | #define IPVS_EST_CPU_KTHREADS (IPVS_EST_LOAD_DIVISOR / 2) | |
421 | ||
422 | /* Desired number of chains per timer tick (chain load factor in 100us units), | |
423 | * 48=4.8ms of 40ms tick (12% CPU usage): | |
424 | * 2 sec * 1000 ms in sec * 10 (100us in ms) / 8 (12.5%) / 50 | |
425 | */ | |
426 | #define IPVS_EST_CHAIN_FACTOR \ | |
427 | ALIGN_DOWN(2 * 1000 * 10 / IPVS_EST_LOAD_DIVISOR / IPVS_EST_NTICKS, 8) | |
428 | ||
429 | /* Compiled number of chains per tick | |
430 | * The defines should match cond_resched_rcu | |
431 | */ | |
432 | #if defined(CONFIG_DEBUG_ATOMIC_SLEEP) || !defined(CONFIG_PREEMPT_RCU) | |
433 | #define IPVS_EST_TICK_CHAINS IPVS_EST_CHAIN_FACTOR | |
434 | #else | |
435 | #define IPVS_EST_TICK_CHAINS 1 | |
436 | #endif | |
437 | ||
438 | #if IPVS_EST_NTICKS > 127 | |
439 | #error Too many timer ticks for ktrow | |
440 | #endif | |
441 | ||
442 | /* Multiple chains processed in same tick */ | |
443 | struct ip_vs_est_tick_data { | |
e4d0fe71 | 444 | struct rcu_head rcu_head; |
705dd344 JA |
445 | struct hlist_head chains[IPVS_EST_TICK_CHAINS]; |
446 | DECLARE_BITMAP(present, IPVS_EST_TICK_CHAINS); | |
447 | DECLARE_BITMAP(full, IPVS_EST_TICK_CHAINS); | |
448 | int chain_len[IPVS_EST_TICK_CHAINS]; | |
449 | }; | |
450 | ||
451 | /* Context for estimation kthread */ | |
452 | struct ip_vs_est_kt_data { | |
453 | struct netns_ipvs *ipvs; | |
454 | struct task_struct *task; /* task if running */ | |
455 | struct ip_vs_est_tick_data __rcu *ticks[IPVS_EST_NTICKS]; | |
456 | DECLARE_BITMAP(avail, IPVS_EST_NTICKS); /* tick has space for ests */ | |
457 | unsigned long est_timer; /* estimation timer (jiffies) */ | |
458 | struct ip_vs_stats *calc_stats; /* Used for calculation */ | |
459 | int tick_len[IPVS_EST_NTICKS]; /* est count */ | |
460 | int id; /* ktid per netns */ | |
461 | int chain_max; /* max ests per tick chain */ | |
462 | int tick_max; /* max ests per tick */ | |
463 | int est_count; /* attached ests to kthread */ | |
464 | int est_max_count; /* max ests per kthread */ | |
465 | int add_row; /* row for new ests */ | |
466 | int est_row; /* estimated row */ | |
467 | }; | |
468 | ||
14c85021 ACM |
469 | struct dst_entry; |
470 | struct iphdr; | |
1da177e4 LT |
471 | struct ip_vs_conn; |
472 | struct ip_vs_app; | |
14c85021 | 473 | struct sk_buff; |
252c6410 | 474 | struct ip_vs_proto_data; |
1da177e4 LT |
475 | |
476 | struct ip_vs_protocol { | |
477 | struct ip_vs_protocol *next; | |
478 | char *name; | |
2ad17def JA |
479 | u16 protocol; |
480 | u16 num_states; | |
1da177e4 | 481 | int dont_defrag; |
1da177e4 LT |
482 | |
483 | void (*init)(struct ip_vs_protocol *pp); | |
484 | ||
485 | void (*exit)(struct ip_vs_protocol *pp); | |
486 | ||
1281a9c2 | 487 | int (*init_netns)(struct netns_ipvs *ipvs, struct ip_vs_proto_data *pd); |
252c6410 | 488 | |
1281a9c2 | 489 | void (*exit_netns)(struct netns_ipvs *ipvs, struct ip_vs_proto_data *pd); |
252c6410 | 490 | |
d8f44c33 EB |
491 | int (*conn_schedule)(struct netns_ipvs *ipvs, |
492 | int af, struct sk_buff *skb, | |
9330419d | 493 | struct ip_vs_proto_data *pd, |
d4383f04 JDB |
494 | int *verdict, struct ip_vs_conn **cpp, |
495 | struct ip_vs_iphdr *iph); | |
1da177e4 LT |
496 | |
497 | struct ip_vs_conn * | |
ab161976 EB |
498 | (*conn_in_get)(struct netns_ipvs *ipvs, |
499 | int af, | |
51ef348b | 500 | const struct sk_buff *skb, |
802c41ad | 501 | const struct ip_vs_iphdr *iph); |
1da177e4 LT |
502 | |
503 | struct ip_vs_conn * | |
0cf705c8 EB |
504 | (*conn_out_get)(struct netns_ipvs *ipvs, |
505 | int af, | |
51ef348b | 506 | const struct sk_buff *skb, |
802c41ad | 507 | const struct ip_vs_iphdr *iph); |
1da177e4 | 508 | |
d4383f04 JDB |
509 | int (*snat_handler)(struct sk_buff *skb, struct ip_vs_protocol *pp, |
510 | struct ip_vs_conn *cp, struct ip_vs_iphdr *iph); | |
1da177e4 | 511 | |
d4383f04 JDB |
512 | int (*dnat_handler)(struct sk_buff *skb, struct ip_vs_protocol *pp, |
513 | struct ip_vs_conn *cp, struct ip_vs_iphdr *iph); | |
1da177e4 | 514 | |
1da177e4 LT |
515 | const char *(*state_name)(int state); |
516 | ||
4a516f11 SH |
517 | void (*state_transition)(struct ip_vs_conn *cp, int direction, |
518 | const struct sk_buff *skb, | |
519 | struct ip_vs_proto_data *pd); | |
1da177e4 | 520 | |
19648918 | 521 | int (*register_app)(struct netns_ipvs *ipvs, struct ip_vs_app *inc); |
1da177e4 | 522 | |
19648918 | 523 | void (*unregister_app)(struct netns_ipvs *ipvs, struct ip_vs_app *inc); |
1da177e4 LT |
524 | |
525 | int (*app_conn_bind)(struct ip_vs_conn *cp); | |
526 | ||
0d79641a | 527 | void (*debug_packet)(int af, struct ip_vs_protocol *pp, |
1da177e4 LT |
528 | const struct sk_buff *skb, |
529 | int offset, | |
530 | const char *msg); | |
531 | ||
9330419d | 532 | void (*timeout_change)(struct ip_vs_proto_data *pd, int flags); |
1da177e4 LT |
533 | }; |
534 | ||
07dcc686 | 535 | /* protocol data per netns */ |
252c6410 HS |
536 | struct ip_vs_proto_data { |
537 | struct ip_vs_proto_data *next; | |
538 | struct ip_vs_protocol *pp; | |
539 | int *timeout_table; /* protocol timeout table */ | |
540 | atomic_t appcnt; /* counter of proto app incs. */ | |
541 | struct tcp_states_t *tcp_state_table; | |
542 | }; | |
543 | ||
5c3a0fd7 | 544 | struct ip_vs_protocol *ip_vs_proto_get(unsigned short proto); |
18d6ade6 | 545 | struct ip_vs_proto_data *ip_vs_proto_data_get(struct netns_ipvs *ipvs, |
5c3a0fd7 | 546 | unsigned short proto); |
1da177e4 | 547 | |
f11017ec | 548 | struct ip_vs_conn_param { |
e64e2b46 | 549 | struct netns_ipvs *ipvs; |
f11017ec SH |
550 | const union nf_inet_addr *caddr; |
551 | const union nf_inet_addr *vaddr; | |
552 | __be16 cport; | |
553 | __be16 vport; | |
554 | __u16 protocol; | |
555 | u16 af; | |
85999283 SH |
556 | |
557 | const struct ip_vs_pe *pe; | |
558 | char *pe_data; | |
559 | __u8 pe_data_len; | |
f11017ec SH |
560 | }; |
561 | ||
07dcc686 | 562 | /* IP_VS structure allocated for each dynamically scheduled connection */ |
1da177e4 | 563 | struct ip_vs_conn { |
731109e7 | 564 | struct hlist_node c_list; /* hashed list heads */ |
1da177e4 | 565 | /* Protocol, addresses and port numbers */ |
6e67e586 | 566 | __be16 cport; |
6e67e586 | 567 | __be16 dport; |
1845ed0b JA |
568 | __be16 vport; |
569 | u16 af; /* address family */ | |
6e67e586 HS |
570 | union nf_inet_addr caddr; /* client address */ |
571 | union nf_inet_addr vaddr; /* virtual address */ | |
572 | union nf_inet_addr daddr; /* destination address */ | |
573 | volatile __u32 flags; /* status flags */ | |
1da177e4 | 574 | __u16 protocol; /* Which protocol (TCP/UDP) */ |
ba38528a | 575 | __u16 daf; /* Address family of the dest */ |
58dbc6f2 | 576 | struct netns_ipvs *ipvs; |
1da177e4 LT |
577 | |
578 | /* counter and timer */ | |
b54ab92b | 579 | refcount_t refcnt; /* reference count */ |
1da177e4 LT |
580 | struct timer_list timer; /* Expiration timer */ |
581 | volatile unsigned long timeout; /* timeout */ | |
582 | ||
583 | /* Flags and state transition */ | |
584 | spinlock_t lock; /* lock for state transition */ | |
1da177e4 | 585 | volatile __u16 state; /* state info */ |
efac5276 | 586 | volatile __u16 old_state; /* old state, to be used for |
c7d15aaa | 587 | * state transition triggered |
efac5276 RB |
588 | * synchronization |
589 | */ | |
1845ed0b | 590 | __u32 fwmark; /* Fire wall mark from skb */ |
749c42b6 | 591 | unsigned long sync_endtime; /* jiffies + sent_retries */ |
1da177e4 LT |
592 | |
593 | /* Control members */ | |
594 | struct ip_vs_conn *control; /* Master control connection */ | |
595 | atomic_t n_control; /* Number of controlled ones */ | |
596 | struct ip_vs_dest *dest; /* real server */ | |
597 | atomic_t in_pkts; /* incoming packet counter */ | |
598 | ||
07dcc686 SH |
599 | /* Packet transmitter for different forwarding methods. If it |
600 | * mangles the packet, it must return NF_DROP or better NF_STOLEN, | |
601 | * otherwise this must be changed to a sk_buff **. | |
602 | * NF_ACCEPT can be returned when destination is local. | |
1da177e4 LT |
603 | */ |
604 | int (*packet_xmit)(struct sk_buff *skb, struct ip_vs_conn *cp, | |
d4383f04 | 605 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); |
1da177e4 LT |
606 | |
607 | /* Note: we can group the following members into a structure, | |
07dcc686 SH |
608 | * in order to save more space, and the following members are |
609 | * only used in VS/NAT anyway | |
610 | */ | |
1da177e4 LT |
611 | struct ip_vs_app *app; /* bound ip_vs_app object */ |
612 | void *app_data; /* Application private data */ | |
e3478c68 SH |
613 | struct_group(sync_conn_opt, |
614 | struct ip_vs_seq in_seq; /* incoming seq. struct */ | |
615 | struct ip_vs_seq out_seq; /* outgoing seq. struct */ | |
616 | ); | |
85999283 | 617 | |
e9e5eee8 | 618 | const struct ip_vs_pe *pe; |
85999283 SH |
619 | char *pe_data; |
620 | __u8 pe_data_len; | |
088339a5 JA |
621 | |
622 | struct rcu_head rcu_head; | |
1da177e4 LT |
623 | }; |
624 | ||
07dcc686 SH |
625 | /* Extended internal versions of struct ip_vs_service_user and ip_vs_dest_user |
626 | * for IPv6 support. | |
c860c6b1 | 627 | * |
07dcc686 SH |
628 | * We need these to conveniently pass around service and destination |
629 | * options, but unfortunately, we also need to keep the old definitions to | |
630 | * maintain userspace backwards compatibility for the setsockopt interface. | |
c860c6b1 JV |
631 | */ |
632 | struct ip_vs_service_user_kern { | |
633 | /* virtual service addresses */ | |
634 | u16 af; | |
635 | u16 protocol; | |
636 | union nf_inet_addr addr; /* virtual ip address */ | |
0a925864 | 637 | __be16 port; |
c7d15aaa | 638 | u32 fwmark; /* firewall mark of service */ |
c860c6b1 JV |
639 | |
640 | /* virtual service options */ | |
641 | char *sched_name; | |
0d1e71b0 | 642 | char *pe_name; |
95c96174 ED |
643 | unsigned int flags; /* virtual service flags */ |
644 | unsigned int timeout; /* persistent timeout in sec */ | |
0a925864 | 645 | __be32 netmask; /* persistent netmask or plen */ |
c860c6b1 JV |
646 | }; |
647 | ||
648 | ||
649 | struct ip_vs_dest_user_kern { | |
650 | /* destination server address */ | |
651 | union nf_inet_addr addr; | |
0a925864 | 652 | __be16 port; |
c860c6b1 JV |
653 | |
654 | /* real server options */ | |
95c96174 | 655 | unsigned int conn_flags; /* connection flags */ |
c860c6b1 JV |
656 | int weight; /* destination weight */ |
657 | ||
658 | /* thresholds for active connections */ | |
659 | u32 u_threshold; /* upper threshold */ | |
660 | u32 l_threshold; /* lower threshold */ | |
6cff339b AG |
661 | |
662 | /* Address family of addr */ | |
663 | u16 af; | |
84c0d5e9 JH |
664 | |
665 | u16 tun_type; /* tunnel type */ | |
666 | __be16 tun_port; /* tunnel port */ | |
29930e31 | 667 | u16 tun_flags; /* tunnel flags */ |
c860c6b1 JV |
668 | }; |
669 | ||
670 | ||
1da177e4 | 671 | /* |
07dcc686 SH |
672 | * The information about the virtual service offered to the net and the |
673 | * forwarding entries. | |
1da177e4 LT |
674 | */ |
675 | struct ip_vs_service { | |
ceec4c38 JA |
676 | struct hlist_node s_list; /* for normal service table */ |
677 | struct hlist_node f_list; /* for fwmark-based service table */ | |
1da177e4 | 678 | atomic_t refcnt; /* reference counter */ |
1da177e4 | 679 | |
e7ade46a | 680 | u16 af; /* address family */ |
1da177e4 | 681 | __u16 protocol; /* which protocol (TCP/UDP) */ |
e7ade46a | 682 | union nf_inet_addr addr; /* IP address for virtual service */ |
014d730d | 683 | __be16 port; /* port number for the service */ |
1da177e4 | 684 | __u32 fwmark; /* firewall mark of the service */ |
95c96174 ED |
685 | unsigned int flags; /* service status flags */ |
686 | unsigned int timeout; /* persistent timeout in ticks */ | |
0a925864 | 687 | __be32 netmask; /* grouping granularity, mask/plen */ |
3109d2f2 | 688 | struct netns_ipvs *ipvs; |
1da177e4 LT |
689 | |
690 | struct list_head destinations; /* real server d-linked list */ | |
691 | __u32 num_dests; /* number of servers */ | |
692 | struct ip_vs_stats stats; /* statistics for the service */ | |
1da177e4 LT |
693 | |
694 | /* for scheduling */ | |
ceec4c38 | 695 | struct ip_vs_scheduler __rcu *scheduler; /* bound scheduler object */ |
ba3a3ce1 | 696 | spinlock_t sched_lock; /* lock sched_data */ |
1da177e4 | 697 | void *sched_data; /* scheduler application data */ |
85999283 SH |
698 | |
699 | /* alternate persistence engine */ | |
ceec4c38 | 700 | struct ip_vs_pe __rcu *pe; |
31875d49 | 701 | int conntrack_afmask; |
ceec4c38 JA |
702 | |
703 | struct rcu_head rcu_head; | |
1da177e4 LT |
704 | }; |
705 | ||
026ace06 JA |
706 | /* Information for cached dst */ |
707 | struct ip_vs_dest_dst { | |
708 | struct dst_entry *dst_cache; /* destination cache entry */ | |
709 | u32 dst_cookie; | |
710 | union nf_inet_addr dst_saddr; | |
711 | struct rcu_head rcu_head; | |
712 | }; | |
1da177e4 | 713 | |
07dcc686 SH |
714 | /* The real server destination forwarding entry with ip address, port number, |
715 | * and so on. | |
1da177e4 LT |
716 | */ |
717 | struct ip_vs_dest { | |
718 | struct list_head n_list; /* for the dests in the service */ | |
276472ea | 719 | struct hlist_node d_list; /* for table with all the dests */ |
1da177e4 | 720 | |
e7ade46a | 721 | u16 af; /* address family */ |
014d730d | 722 | __be16 port; /* port number of the server */ |
f2431e6e | 723 | union nf_inet_addr addr; /* IP address of the server */ |
95c96174 | 724 | volatile unsigned int flags; /* dest status flags */ |
1da177e4 LT |
725 | atomic_t conn_flags; /* flags to copy to conn */ |
726 | atomic_t weight; /* server weight */ | |
a2c09ac0 | 727 | atomic_t last_weight; /* server latest weight */ |
84c0d5e9 JH |
728 | __u16 tun_type; /* tunnel type */ |
729 | __be16 tun_port; /* tunnel port */ | |
29930e31 | 730 | __u16 tun_flags; /* tunnel flags */ |
1da177e4 | 731 | |
b54ab92b | 732 | refcount_t refcnt; /* reference counter */ |
1da177e4 | 733 | struct ip_vs_stats stats; /* statistics */ |
bcbde4c0 | 734 | unsigned long idle_start; /* start time, jiffies */ |
1da177e4 LT |
735 | |
736 | /* connection counters and thresholds */ | |
737 | atomic_t activeconns; /* active connections */ | |
738 | atomic_t inactconns; /* inactive connections */ | |
739 | atomic_t persistconns; /* persistent connections */ | |
740 | __u32 u_threshold; /* upper threshold */ | |
741 | __u32 l_threshold; /* lower threshold */ | |
742 | ||
743 | /* for destination cache */ | |
744 | spinlock_t dst_lock; /* lock of dst_cache */ | |
026ace06 | 745 | struct ip_vs_dest_dst __rcu *dest_dst; /* cached dst info */ |
1da177e4 LT |
746 | |
747 | /* for virtual service */ | |
bcbde4c0 | 748 | struct ip_vs_service __rcu *svc; /* service it belongs to */ |
1da177e4 | 749 | __u16 protocol; /* which protocol (TCP/UDP) */ |
014d730d | 750 | __be16 vport; /* virtual port number */ |
f2431e6e | 751 | union nf_inet_addr vaddr; /* virtual IP address */ |
1da177e4 | 752 | __u32 vfwmark; /* firewall mark of service */ |
276472ea | 753 | |
5df7d714 | 754 | struct rcu_head rcu_head; |
578bc3ef | 755 | struct list_head t_list; /* in dest_trash */ |
276472ea | 756 | unsigned int in_rs_table:1; /* we are in rs_table */ |
1da177e4 LT |
757 | }; |
758 | ||
07dcc686 | 759 | /* The scheduler object */ |
1da177e4 LT |
760 | struct ip_vs_scheduler { |
761 | struct list_head n_list; /* d-linked list head */ | |
762 | char *name; /* scheduler name */ | |
763 | atomic_t refcnt; /* reference counter */ | |
764 | struct module *module; /* THIS_MODULE/NULL */ | |
765 | ||
766 | /* scheduler initializing service */ | |
767 | int (*init_service)(struct ip_vs_service *svc); | |
768 | /* scheduling service finish */ | |
ed3ffc4e | 769 | void (*done_service)(struct ip_vs_service *svc); |
6b6df466 JA |
770 | /* dest is linked */ |
771 | int (*add_dest)(struct ip_vs_service *svc, struct ip_vs_dest *dest); | |
772 | /* dest is unlinked */ | |
773 | int (*del_dest)(struct ip_vs_service *svc, struct ip_vs_dest *dest); | |
774 | /* dest is updated */ | |
775 | int (*upd_dest)(struct ip_vs_service *svc, struct ip_vs_dest *dest); | |
1da177e4 LT |
776 | |
777 | /* selecting a server from the given service */ | |
778 | struct ip_vs_dest* (*schedule)(struct ip_vs_service *svc, | |
bba54de5 JA |
779 | const struct sk_buff *skb, |
780 | struct ip_vs_iphdr *iph); | |
1da177e4 LT |
781 | }; |
782 | ||
85999283 SH |
783 | /* The persistence engine object */ |
784 | struct ip_vs_pe { | |
785 | struct list_head n_list; /* d-linked list head */ | |
786 | char *name; /* scheduler name */ | |
787 | atomic_t refcnt; /* reference counter */ | |
788 | struct module *module; /* THIS_MODULE/NULL */ | |
789 | ||
790 | /* get the connection template, if any */ | |
791 | int (*fill_param)(struct ip_vs_conn_param *p, struct sk_buff *skb); | |
792 | bool (*ct_match)(const struct ip_vs_conn_param *p, | |
793 | struct ip_vs_conn *ct); | |
794 | u32 (*hashkey_raw)(const struct ip_vs_conn_param *p, u32 initval, | |
795 | bool inverse); | |
a3c918ac | 796 | int (*show_pe_data)(const struct ip_vs_conn *cp, char *buf); |
39b97223 MA |
797 | /* create connections for real-server outgoing packets */ |
798 | struct ip_vs_conn* (*conn_out)(struct ip_vs_service *svc, | |
799 | struct ip_vs_dest *dest, | |
800 | struct sk_buff *skb, | |
801 | const struct ip_vs_iphdr *iph, | |
802 | __be16 dport, __be16 cport); | |
85999283 | 803 | }; |
1da177e4 | 804 | |
07dcc686 | 805 | /* The application module object (a.k.a. app incarnation) */ |
fd2c3ef7 | 806 | struct ip_vs_app { |
1da177e4 LT |
807 | struct list_head a_list; /* member in app list */ |
808 | int type; /* IP_VS_APP_TYPE_xxx */ | |
809 | char *name; /* application module name */ | |
810 | __u16 protocol; | |
811 | struct module *module; /* THIS_MODULE/NULL */ | |
812 | struct list_head incs_list; /* list of incarnations */ | |
813 | ||
814 | /* members for application incarnations */ | |
815 | struct list_head p_list; /* member in proto app list */ | |
816 | struct ip_vs_app *app; /* its real application */ | |
014d730d | 817 | __be16 port; /* port number in net order */ |
1da177e4 | 818 | atomic_t usecnt; /* usage counter */ |
363c97d7 | 819 | struct rcu_head rcu_head; |
1da177e4 | 820 | |
07dcc686 | 821 | /* output hook: Process packet in inout direction, diff set for TCP. |
8b27b10f JA |
822 | * Return: 0=Error, 1=Payload Not Mangled/Mangled but checksum is ok, |
823 | * 2=Mangled but checksum was not updated | |
824 | */ | |
1da177e4 | 825 | int (*pkt_out)(struct ip_vs_app *, struct ip_vs_conn *, |
d12e1229 | 826 | struct sk_buff *, int *diff, struct ip_vs_iphdr *ipvsh); |
1da177e4 | 827 | |
07dcc686 | 828 | /* input hook: Process packet in outin direction, diff set for TCP. |
8b27b10f JA |
829 | * Return: 0=Error, 1=Payload Not Mangled/Mangled but checksum is ok, |
830 | * 2=Mangled but checksum was not updated | |
831 | */ | |
1da177e4 | 832 | int (*pkt_in)(struct ip_vs_app *, struct ip_vs_conn *, |
d12e1229 | 833 | struct sk_buff *, int *diff, struct ip_vs_iphdr *ipvsh); |
1da177e4 LT |
834 | |
835 | /* ip_vs_app initializer */ | |
836 | int (*init_conn)(struct ip_vs_app *, struct ip_vs_conn *); | |
837 | ||
838 | /* ip_vs_app finish */ | |
839 | int (*done_conn)(struct ip_vs_app *, struct ip_vs_conn *); | |
840 | ||
841 | ||
842 | /* not used now */ | |
843 | int (*bind_conn)(struct ip_vs_app *, struct ip_vs_conn *, | |
844 | struct ip_vs_protocol *); | |
845 | ||
846 | void (*unbind_conn)(struct ip_vs_app *, struct ip_vs_conn *); | |
847 | ||
848 | int * timeout_table; | |
849 | int * timeouts; | |
850 | int timeouts_size; | |
851 | ||
852 | int (*conn_schedule)(struct sk_buff *skb, struct ip_vs_app *app, | |
853 | int *verdict, struct ip_vs_conn **cpp); | |
854 | ||
855 | struct ip_vs_conn * | |
856 | (*conn_in_get)(const struct sk_buff *skb, struct ip_vs_app *app, | |
d4383f04 | 857 | const struct iphdr *iph, int inverse); |
1da177e4 LT |
858 | |
859 | struct ip_vs_conn * | |
860 | (*conn_out_get)(const struct sk_buff *skb, struct ip_vs_app *app, | |
d4383f04 | 861 | const struct iphdr *iph, int inverse); |
1da177e4 LT |
862 | |
863 | int (*state_transition)(struct ip_vs_conn *cp, int direction, | |
864 | const struct sk_buff *skb, | |
865 | struct ip_vs_app *app); | |
866 | ||
867 | void (*timeout_change)(struct ip_vs_app *app, int flags); | |
868 | }; | |
869 | ||
f73181c8 PNA |
870 | struct ipvs_master_sync_state { |
871 | struct list_head sync_queue; | |
872 | struct ip_vs_sync_buff *sync_buff; | |
07995674 | 873 | unsigned long sync_queue_len; |
f73181c8 | 874 | unsigned int sync_queue_delay; |
f73181c8 PNA |
875 | struct delayed_work master_wakeup_work; |
876 | struct netns_ipvs *ipvs; | |
877 | }; | |
878 | ||
5db7c8b9 JA |
879 | struct ip_vs_sync_thread_data; |
880 | ||
578bc3ef JA |
881 | /* How much time to keep dests in trash */ |
882 | #define IP_VS_DEST_TRASH_PERIOD (120 * HZ) | |
883 | ||
e4ff6751 | 884 | struct ipvs_sync_daemon_cfg { |
d3328817 | 885 | union nf_inet_addr mcast_group; |
e4ff6751 JA |
886 | int syncid; |
887 | u16 sync_maxlen; | |
d3328817 JA |
888 | u16 mcast_port; |
889 | u8 mcast_af; | |
890 | u8 mcast_ttl; | |
e4ff6751 JA |
891 | /* multicast interface name */ |
892 | char mcast_ifn[IP_VS_IFNAME_MAXLEN]; | |
893 | }; | |
894 | ||
2553d064 JA |
895 | /* IPVS in network namespace */ |
896 | struct netns_ipvs { | |
897 | int gen; /* Generation */ | |
7a4f0761 | 898 | int enable; /* enable like nf_hooks do */ |
07dcc686 | 899 | /* Hash table: for real service lookups */ |
2553d064 JA |
900 | #define IP_VS_RTAB_BITS 4 |
901 | #define IP_VS_RTAB_SIZE (1 << IP_VS_RTAB_BITS) | |
902 | #define IP_VS_RTAB_MASK (IP_VS_RTAB_SIZE - 1) | |
903 | ||
276472ea | 904 | struct hlist_head rs_table[IP_VS_RTAB_SIZE]; |
2553d064 JA |
905 | /* ip_vs_app */ |
906 | struct list_head app_list; | |
2553d064 JA |
907 | /* ip_vs_proto */ |
908 | #define IP_VS_PROTO_TAB_SIZE 32 /* must be power of 2 */ | |
909 | struct ip_vs_proto_data *proto_data_table[IP_VS_PROTO_TAB_SIZE]; | |
910 | /* ip_vs_proto_tcp */ | |
911 | #ifdef CONFIG_IP_VS_PROTO_TCP | |
912 | #define TCP_APP_TAB_BITS 4 | |
913 | #define TCP_APP_TAB_SIZE (1 << TCP_APP_TAB_BITS) | |
914 | #define TCP_APP_TAB_MASK (TCP_APP_TAB_SIZE - 1) | |
915 | struct list_head tcp_apps[TCP_APP_TAB_SIZE]; | |
2553d064 JA |
916 | #endif |
917 | /* ip_vs_proto_udp */ | |
918 | #ifdef CONFIG_IP_VS_PROTO_UDP | |
919 | #define UDP_APP_TAB_BITS 4 | |
920 | #define UDP_APP_TAB_SIZE (1 << UDP_APP_TAB_BITS) | |
921 | #define UDP_APP_TAB_MASK (UDP_APP_TAB_SIZE - 1) | |
922 | struct list_head udp_apps[UDP_APP_TAB_SIZE]; | |
2553d064 JA |
923 | #endif |
924 | /* ip_vs_proto_sctp */ | |
925 | #ifdef CONFIG_IP_VS_PROTO_SCTP | |
926 | #define SCTP_APP_TAB_BITS 4 | |
927 | #define SCTP_APP_TAB_SIZE (1 << SCTP_APP_TAB_BITS) | |
928 | #define SCTP_APP_TAB_MASK (SCTP_APP_TAB_SIZE - 1) | |
929 | /* Hash table for SCTP application incarnations */ | |
930 | struct list_head sctp_apps[SCTP_APP_TAB_SIZE]; | |
2553d064 JA |
931 | #endif |
932 | /* ip_vs_conn */ | |
07dcc686 | 933 | atomic_t conn_count; /* connection counter */ |
2553d064 JA |
934 | |
935 | /* ip_vs_ctl */ | |
5df7d714 | 936 | struct ip_vs_stats_rcu *tot_stats; /* Statistics & est. */ |
2553d064 JA |
937 | |
938 | int num_services; /* no of virtual services */ | |
857ca897 | 939 | int num_services6; /* IPv6 virtual services */ |
f2247fbd | 940 | |
f2247fbd SH |
941 | /* Trash for destinations */ |
942 | struct list_head dest_trash; | |
578bc3ef JA |
943 | spinlock_t dest_trash_lock; |
944 | struct timer_list dest_trash_timer; /* expiration timer */ | |
f2247fbd SH |
945 | /* Service counters */ |
946 | atomic_t ftpsvc_counter; | |
947 | atomic_t nullsvc_counter; | |
39b97223 | 948 | atomic_t conn_out_counter; |
f2247fbd SH |
949 | |
950 | #ifdef CONFIG_SYSCTL | |
35dfb013 ASK |
951 | /* delayed work for expiring no dest connections */ |
952 | struct delayed_work expire_nodest_conn_work; | |
2553d064 JA |
953 | /* 1/rate drop and drop-entry variables */ |
954 | struct delayed_work defense_work; /* Work handler */ | |
955 | int drop_rate; | |
956 | int drop_counter; | |
c24b75e0 | 957 | int old_secure_tcp; |
2553d064 JA |
958 | atomic_t dropentry; |
959 | /* locks in ctl.c */ | |
960 | spinlock_t dropentry_lock; /* drop entry handling */ | |
961 | spinlock_t droppacket_lock; /* drop packet handling */ | |
962 | spinlock_t securetcp_lock; /* state and timeout tables */ | |
2553d064 JA |
963 | |
964 | /* sys-ctl struct */ | |
965 | struct ctl_table_header *sysctl_hdr; | |
966 | struct ctl_table *sysctl_tbl; | |
f2247fbd SH |
967 | #endif |
968 | ||
2553d064 JA |
969 | /* sysctl variables */ |
970 | int sysctl_amemthresh; | |
971 | int sysctl_am_droprate; | |
972 | int sysctl_drop_entry; | |
973 | int sysctl_drop_packet; | |
974 | int sysctl_secure_tcp; | |
975 | #ifdef CONFIG_IP_VS_NFCT | |
976 | int sysctl_conntrack; | |
977 | #endif | |
978 | int sysctl_snat_reroute; | |
979 | int sysctl_sync_ver; | |
f73181c8 | 980 | int sysctl_sync_ports; |
4d0c875d | 981 | int sysctl_sync_persist_mode; |
07995674 | 982 | unsigned long sysctl_sync_qlen_max; |
1c003b15 | 983 | int sysctl_sync_sock_size; |
2553d064 JA |
984 | int sysctl_cache_bypass; |
985 | int sysctl_expire_nodest_conn; | |
c6c96c18 AF |
986 | int sysctl_sloppy_tcp; |
987 | int sysctl_sloppy_sctp; | |
2553d064 JA |
988 | int sysctl_expire_quiescent_template; |
989 | int sysctl_sync_threshold[2]; | |
749c42b6 JA |
990 | unsigned int sysctl_sync_refresh_period; |
991 | int sysctl_sync_retries; | |
2553d064 | 992 | int sysctl_nat_icmp_send; |
3654e611 | 993 | int sysctl_pmtu_disc; |
0c12582f | 994 | int sysctl_backup_only; |
d752c364 | 995 | int sysctl_conn_reuse_mode; |
94485fed | 996 | int sysctl_schedule_icmp; |
4e478098 | 997 | int sysctl_ignore_tunneled; |
2232642e | 998 | int sysctl_run_estimation; |
f0be83d5 JA |
999 | #ifdef CONFIG_SYSCTL |
1000 | cpumask_var_t sysctl_est_cpulist; /* kthread cpumask */ | |
1001 | int est_cpulist_valid; /* cpulist set */ | |
1002 | int sysctl_est_nice; /* kthread nice */ | |
1003 | int est_stopped; /* stop tasks */ | |
1004 | #endif | |
2553d064 JA |
1005 | |
1006 | /* ip_vs_lblc */ | |
1007 | int sysctl_lblc_expiration; | |
1008 | struct ctl_table_header *lblc_ctl_header; | |
1009 | struct ctl_table *lblc_ctl_table; | |
1010 | /* ip_vs_lblcr */ | |
1011 | int sysctl_lblcr_expiration; | |
1012 | struct ctl_table_header *lblcr_ctl_header; | |
1013 | struct ctl_table *lblcr_ctl_table; | |
1014 | /* ip_vs_est */ | |
705dd344 JA |
1015 | struct delayed_work est_reload_work;/* Reload kthread tasks */ |
1016 | struct mutex est_mutex; /* protect kthread tasks */ | |
1017 | struct hlist_head est_temp_list; /* Ests during calc phase */ | |
1018 | struct ip_vs_est_kt_data **est_kt_arr; /* Array of kthread data ptrs */ | |
1019 | unsigned long est_max_threads;/* Hard limit of kthreads */ | |
1020 | int est_calc_phase; /* Calculation phase */ | |
1021 | int est_chain_max; /* Calculated chain_max */ | |
1022 | int est_kt_count; /* Allocated ptrs */ | |
1023 | int est_add_ktid; /* ktid where to add ests */ | |
1024 | atomic_t est_genid; /* kthreads reload genid */ | |
1025 | atomic_t est_genid_done; /* applied genid */ | |
2553d064 | 1026 | /* ip_vs_sync */ |
2553d064 | 1027 | spinlock_t sync_lock; |
f73181c8 | 1028 | struct ipvs_master_sync_state *ms; |
2553d064 | 1029 | spinlock_t sync_buff_lock; |
5db7c8b9 JA |
1030 | struct ip_vs_sync_thread_data *master_tinfo; |
1031 | struct ip_vs_sync_thread_data *backup_tinfo; | |
f73181c8 | 1032 | int threads_mask; |
2553d064 | 1033 | volatile int sync_state; |
ae1d48b2 | 1034 | struct mutex sync_mutex; |
e4ff6751 JA |
1035 | struct ipvs_sync_daemon_cfg mcfg; /* Master Configuration */ |
1036 | struct ipvs_sync_daemon_cfg bcfg; /* Backup Configuration */ | |
2553d064 JA |
1037 | /* net name space ptr */ |
1038 | struct net *net; /* Needed by timer routines */ | |
c7d15aaa | 1039 | /* Number of heterogeneous destinations, needed because heterogeneous |
07dcc686 SH |
1040 | * are not supported when synchronization is enabled. |
1041 | */ | |
391f503d | 1042 | unsigned int mixed_address_family_dests; |
857ca897 | 1043 | unsigned int hooks_afmask; /* &1=AF_INET, &2=AF_INET6 */ |
2553d064 | 1044 | }; |
1da177e4 | 1045 | |
59e0350e SH |
1046 | #define DEFAULT_SYNC_THRESHOLD 3 |
1047 | #define DEFAULT_SYNC_PERIOD 50 | |
7532e8d4 | 1048 | #define DEFAULT_SYNC_VER 1 |
c6c96c18 AF |
1049 | #define DEFAULT_SLOPPY_TCP 0 |
1050 | #define DEFAULT_SLOPPY_SCTP 0 | |
749c42b6 JA |
1051 | #define DEFAULT_SYNC_REFRESH_PERIOD (0U * HZ) |
1052 | #define DEFAULT_SYNC_RETRIES 0 | |
1c003b15 PNA |
1053 | #define IPVS_SYNC_WAKEUP_RATE 8 |
1054 | #define IPVS_SYNC_QLEN_MAX (IPVS_SYNC_WAKEUP_RATE * 4) | |
1055 | #define IPVS_SYNC_SEND_DELAY (HZ / 50) | |
1056 | #define IPVS_SYNC_CHECK_PERIOD HZ | |
749c42b6 | 1057 | #define IPVS_SYNC_FLUSH_TIME (HZ * 2) |
f73181c8 | 1058 | #define IPVS_SYNC_PORTS_MAX (1 << 6) |
59e0350e SH |
1059 | |
1060 | #ifdef CONFIG_SYSCTL | |
1061 | ||
1062 | static inline int sysctl_sync_threshold(struct netns_ipvs *ipvs) | |
1063 | { | |
1064 | return ipvs->sysctl_sync_threshold[0]; | |
1065 | } | |
1066 | ||
1067 | static inline int sysctl_sync_period(struct netns_ipvs *ipvs) | |
1068 | { | |
6aa7de05 | 1069 | return READ_ONCE(ipvs->sysctl_sync_threshold[1]); |
749c42b6 JA |
1070 | } |
1071 | ||
1072 | static inline unsigned int sysctl_sync_refresh_period(struct netns_ipvs *ipvs) | |
1073 | { | |
6aa7de05 | 1074 | return READ_ONCE(ipvs->sysctl_sync_refresh_period); |
749c42b6 JA |
1075 | } |
1076 | ||
1077 | static inline int sysctl_sync_retries(struct netns_ipvs *ipvs) | |
1078 | { | |
1079 | return ipvs->sysctl_sync_retries; | |
59e0350e SH |
1080 | } |
1081 | ||
7532e8d4 SH |
1082 | static inline int sysctl_sync_ver(struct netns_ipvs *ipvs) |
1083 | { | |
1084 | return ipvs->sysctl_sync_ver; | |
1085 | } | |
1086 | ||
c6c96c18 AF |
1087 | static inline int sysctl_sloppy_tcp(struct netns_ipvs *ipvs) |
1088 | { | |
1089 | return ipvs->sysctl_sloppy_tcp; | |
1090 | } | |
1091 | ||
1092 | static inline int sysctl_sloppy_sctp(struct netns_ipvs *ipvs) | |
1093 | { | |
1094 | return ipvs->sysctl_sloppy_sctp; | |
1095 | } | |
1096 | ||
f73181c8 PNA |
1097 | static inline int sysctl_sync_ports(struct netns_ipvs *ipvs) |
1098 | { | |
6aa7de05 | 1099 | return READ_ONCE(ipvs->sysctl_sync_ports); |
f73181c8 PNA |
1100 | } |
1101 | ||
4d0c875d JA |
1102 | static inline int sysctl_sync_persist_mode(struct netns_ipvs *ipvs) |
1103 | { | |
1104 | return ipvs->sysctl_sync_persist_mode; | |
1105 | } | |
1106 | ||
07995674 | 1107 | static inline unsigned long sysctl_sync_qlen_max(struct netns_ipvs *ipvs) |
1c003b15 PNA |
1108 | { |
1109 | return ipvs->sysctl_sync_qlen_max; | |
1110 | } | |
1111 | ||
1112 | static inline int sysctl_sync_sock_size(struct netns_ipvs *ipvs) | |
1113 | { | |
1114 | return ipvs->sysctl_sync_sock_size; | |
1115 | } | |
1116 | ||
3654e611 JA |
1117 | static inline int sysctl_pmtu_disc(struct netns_ipvs *ipvs) |
1118 | { | |
1119 | return ipvs->sysctl_pmtu_disc; | |
1120 | } | |
1121 | ||
0c12582f JA |
1122 | static inline int sysctl_backup_only(struct netns_ipvs *ipvs) |
1123 | { | |
1124 | return ipvs->sync_state & IP_VS_STATE_BACKUP && | |
1125 | ipvs->sysctl_backup_only; | |
1126 | } | |
1127 | ||
d752c364 MRL |
1128 | static inline int sysctl_conn_reuse_mode(struct netns_ipvs *ipvs) |
1129 | { | |
1130 | return ipvs->sysctl_conn_reuse_mode; | |
1131 | } | |
1132 | ||
35dfb013 ASK |
1133 | static inline int sysctl_expire_nodest_conn(struct netns_ipvs *ipvs) |
1134 | { | |
1135 | return ipvs->sysctl_expire_nodest_conn; | |
1136 | } | |
1137 | ||
94485fed AG |
1138 | static inline int sysctl_schedule_icmp(struct netns_ipvs *ipvs) |
1139 | { | |
1140 | return ipvs->sysctl_schedule_icmp; | |
1141 | } | |
1142 | ||
4e478098 AG |
1143 | static inline int sysctl_ignore_tunneled(struct netns_ipvs *ipvs) |
1144 | { | |
1145 | return ipvs->sysctl_ignore_tunneled; | |
1146 | } | |
1147 | ||
57032948 EB |
1148 | static inline int sysctl_cache_bypass(struct netns_ipvs *ipvs) |
1149 | { | |
1150 | return ipvs->sysctl_cache_bypass; | |
1151 | } | |
1152 | ||
2232642e DL |
1153 | static inline int sysctl_run_estimation(struct netns_ipvs *ipvs) |
1154 | { | |
1155 | return ipvs->sysctl_run_estimation; | |
1156 | } | |
1157 | ||
f0be83d5 JA |
1158 | static inline const struct cpumask *sysctl_est_cpulist(struct netns_ipvs *ipvs) |
1159 | { | |
1160 | if (ipvs->est_cpulist_valid) | |
1161 | return ipvs->sysctl_est_cpulist; | |
1162 | else | |
1163 | return housekeeping_cpumask(HK_TYPE_KTHREAD); | |
1164 | } | |
1165 | ||
1166 | static inline int sysctl_est_nice(struct netns_ipvs *ipvs) | |
1167 | { | |
1168 | return ipvs->sysctl_est_nice; | |
1169 | } | |
1170 | ||
59e0350e SH |
1171 | #else |
1172 | ||
1173 | static inline int sysctl_sync_threshold(struct netns_ipvs *ipvs) | |
1174 | { | |
1175 | return DEFAULT_SYNC_THRESHOLD; | |
1176 | } | |
1177 | ||
1178 | static inline int sysctl_sync_period(struct netns_ipvs *ipvs) | |
1179 | { | |
1180 | return DEFAULT_SYNC_PERIOD; | |
1181 | } | |
1182 | ||
749c42b6 JA |
1183 | static inline unsigned int sysctl_sync_refresh_period(struct netns_ipvs *ipvs) |
1184 | { | |
1185 | return DEFAULT_SYNC_REFRESH_PERIOD; | |
1186 | } | |
1187 | ||
1188 | static inline int sysctl_sync_retries(struct netns_ipvs *ipvs) | |
1189 | { | |
1190 | return DEFAULT_SYNC_RETRIES & 3; | |
1191 | } | |
1192 | ||
7532e8d4 SH |
1193 | static inline int sysctl_sync_ver(struct netns_ipvs *ipvs) |
1194 | { | |
1195 | return DEFAULT_SYNC_VER; | |
1196 | } | |
1197 | ||
c6c96c18 AF |
1198 | static inline int sysctl_sloppy_tcp(struct netns_ipvs *ipvs) |
1199 | { | |
1200 | return DEFAULT_SLOPPY_TCP; | |
1201 | } | |
1202 | ||
1203 | static inline int sysctl_sloppy_sctp(struct netns_ipvs *ipvs) | |
1204 | { | |
1205 | return DEFAULT_SLOPPY_SCTP; | |
1206 | } | |
1207 | ||
f73181c8 PNA |
1208 | static inline int sysctl_sync_ports(struct netns_ipvs *ipvs) |
1209 | { | |
1210 | return 1; | |
1211 | } | |
1212 | ||
4d0c875d JA |
1213 | static inline int sysctl_sync_persist_mode(struct netns_ipvs *ipvs) |
1214 | { | |
1215 | return 0; | |
1216 | } | |
1217 | ||
07995674 | 1218 | static inline unsigned long sysctl_sync_qlen_max(struct netns_ipvs *ipvs) |
1c003b15 PNA |
1219 | { |
1220 | return IPVS_SYNC_QLEN_MAX; | |
1221 | } | |
1222 | ||
1223 | static inline int sysctl_sync_sock_size(struct netns_ipvs *ipvs) | |
1224 | { | |
1225 | return 0; | |
1226 | } | |
1227 | ||
3654e611 JA |
1228 | static inline int sysctl_pmtu_disc(struct netns_ipvs *ipvs) |
1229 | { | |
1230 | return 1; | |
1231 | } | |
1232 | ||
0c12582f JA |
1233 | static inline int sysctl_backup_only(struct netns_ipvs *ipvs) |
1234 | { | |
1235 | return 0; | |
1236 | } | |
1237 | ||
d752c364 MRL |
1238 | static inline int sysctl_conn_reuse_mode(struct netns_ipvs *ipvs) |
1239 | { | |
1240 | return 1; | |
1241 | } | |
1242 | ||
35dfb013 ASK |
1243 | static inline int sysctl_expire_nodest_conn(struct netns_ipvs *ipvs) |
1244 | { | |
1245 | return 0; | |
1246 | } | |
1247 | ||
94485fed AG |
1248 | static inline int sysctl_schedule_icmp(struct netns_ipvs *ipvs) |
1249 | { | |
1250 | return 0; | |
1251 | } | |
1252 | ||
4e478098 AG |
1253 | static inline int sysctl_ignore_tunneled(struct netns_ipvs *ipvs) |
1254 | { | |
1255 | return 0; | |
1256 | } | |
1257 | ||
57032948 EB |
1258 | static inline int sysctl_cache_bypass(struct netns_ipvs *ipvs) |
1259 | { | |
1260 | return 0; | |
1261 | } | |
1262 | ||
2232642e DL |
1263 | static inline int sysctl_run_estimation(struct netns_ipvs *ipvs) |
1264 | { | |
1265 | return 1; | |
1266 | } | |
1267 | ||
f0be83d5 JA |
1268 | static inline const struct cpumask *sysctl_est_cpulist(struct netns_ipvs *ipvs) |
1269 | { | |
1270 | return housekeeping_cpumask(HK_TYPE_KTHREAD); | |
1271 | } | |
1272 | ||
1273 | static inline int sysctl_est_nice(struct netns_ipvs *ipvs) | |
1274 | { | |
1275 | return IPVS_EST_NICE; | |
1276 | } | |
1277 | ||
59e0350e SH |
1278 | #endif |
1279 | ||
07dcc686 SH |
1280 | /* IPVS core functions |
1281 | * (from ip_vs_core.c) | |
1da177e4 | 1282 | */ |
5c3a0fd7 JP |
1283 | const char *ip_vs_proto_name(unsigned int proto); |
1284 | void ip_vs_init_hash_table(struct list_head *table, int rows); | |
39b97223 MA |
1285 | struct ip_vs_conn *ip_vs_new_conn_out(struct ip_vs_service *svc, |
1286 | struct ip_vs_dest *dest, | |
1287 | struct sk_buff *skb, | |
1288 | const struct ip_vs_iphdr *iph, | |
1289 | __be16 dport, | |
1290 | __be16 cport); | |
afdd6140 | 1291 | #define IP_VS_INIT_HASH_TABLE(t) ip_vs_init_hash_table((t), ARRAY_SIZE((t))) |
1da177e4 | 1292 | |
1da177e4 LT |
1293 | #define IP_VS_APP_TYPE_FTP 1 |
1294 | ||
07dcc686 SH |
1295 | /* ip_vs_conn handling functions |
1296 | * (from ip_vs_conn.c) | |
1da177e4 | 1297 | */ |
1da177e4 LT |
1298 | enum { |
1299 | IP_VS_DIR_INPUT = 0, | |
1300 | IP_VS_DIR_OUTPUT, | |
1301 | IP_VS_DIR_INPUT_ONLY, | |
1302 | IP_VS_DIR_LAST, | |
1303 | }; | |
1304 | ||
19913dec | 1305 | static inline void ip_vs_conn_fill_param(struct netns_ipvs *ipvs, int af, int protocol, |
f11017ec SH |
1306 | const union nf_inet_addr *caddr, |
1307 | __be16 cport, | |
1308 | const union nf_inet_addr *vaddr, | |
1309 | __be16 vport, | |
1310 | struct ip_vs_conn_param *p) | |
1311 | { | |
19913dec | 1312 | p->ipvs = ipvs; |
f11017ec SH |
1313 | p->af = af; |
1314 | p->protocol = protocol; | |
1315 | p->caddr = caddr; | |
1316 | p->cport = cport; | |
1317 | p->vaddr = vaddr; | |
1318 | p->vport = vport; | |
85999283 SH |
1319 | p->pe = NULL; |
1320 | p->pe_data = NULL; | |
f11017ec | 1321 | } |
28364a59 | 1322 | |
f11017ec SH |
1323 | struct ip_vs_conn *ip_vs_conn_in_get(const struct ip_vs_conn_param *p); |
1324 | struct ip_vs_conn *ip_vs_ct_in_get(const struct ip_vs_conn_param *p); | |
28364a59 | 1325 | |
ab161976 EB |
1326 | struct ip_vs_conn * ip_vs_conn_in_get_proto(struct netns_ipvs *ipvs, int af, |
1327 | const struct sk_buff *skb, | |
802c41ad | 1328 | const struct ip_vs_iphdr *iph); |
5c0d2374 | 1329 | |
f11017ec | 1330 | struct ip_vs_conn *ip_vs_conn_out_get(const struct ip_vs_conn_param *p); |
1da177e4 | 1331 | |
0cf705c8 EB |
1332 | struct ip_vs_conn * ip_vs_conn_out_get_proto(struct netns_ipvs *ipvs, int af, |
1333 | const struct sk_buff *skb, | |
802c41ad | 1334 | const struct ip_vs_iphdr *iph); |
5c0d2374 | 1335 | |
088339a5 JA |
1336 | /* Get reference to gain full access to conn. |
1337 | * By default, RCU read-side critical sections have access only to | |
1338 | * conn fields and its PE data, see ip_vs_conn_rcu_free() for reference. | |
1339 | */ | |
1340 | static inline bool __ip_vs_conn_get(struct ip_vs_conn *cp) | |
1341 | { | |
b54ab92b | 1342 | return refcount_inc_not_zero(&cp->refcnt); |
088339a5 JA |
1343 | } |
1344 | ||
1da177e4 LT |
1345 | /* put back the conn without restarting its timer */ |
1346 | static inline void __ip_vs_conn_put(struct ip_vs_conn *cp) | |
1347 | { | |
4e857c58 | 1348 | smp_mb__before_atomic(); |
b54ab92b | 1349 | refcount_dec(&cp->refcnt); |
1da177e4 | 1350 | } |
5c3a0fd7 JP |
1351 | void ip_vs_conn_put(struct ip_vs_conn *cp); |
1352 | void ip_vs_conn_fill_cport(struct ip_vs_conn *cp, __be16 cport); | |
1da177e4 | 1353 | |
ba38528a | 1354 | struct ip_vs_conn *ip_vs_conn_new(const struct ip_vs_conn_param *p, int dest_af, |
f11017ec | 1355 | const union nf_inet_addr *daddr, |
95c96174 | 1356 | __be16 dport, unsigned int flags, |
0e051e68 | 1357 | struct ip_vs_dest *dest, __u32 fwmark); |
5c3a0fd7 | 1358 | void ip_vs_conn_expire_now(struct ip_vs_conn *cp); |
1da177e4 | 1359 | |
ec1b28ca | 1360 | const char *ip_vs_state_name(const struct ip_vs_conn *cp); |
1da177e4 | 1361 | |
69f39093 | 1362 | void ip_vs_tcp_conn_listen(struct ip_vs_conn *cp); |
3ec10d3a | 1363 | int ip_vs_check_template(struct ip_vs_conn *ct, struct ip_vs_dest *cdest); |
423b5595 | 1364 | void ip_vs_random_dropentry(struct netns_ipvs *ipvs); |
5c3a0fd7 JP |
1365 | int ip_vs_conn_init(void); |
1366 | void ip_vs_conn_cleanup(void); | |
1da177e4 LT |
1367 | |
1368 | static inline void ip_vs_control_del(struct ip_vs_conn *cp) | |
1369 | { | |
1370 | struct ip_vs_conn *ctl_cp = cp->control; | |
1371 | if (!ctl_cp) { | |
cfc78c5a JV |
1372 | IP_VS_ERR_BUF("request control DEL for uncontrolled: " |
1373 | "%s:%d to %s:%d\n", | |
1374 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1375 | ntohs(cp->cport), | |
1376 | IP_VS_DBG_ADDR(cp->af, &cp->vaddr), | |
1377 | ntohs(cp->vport)); | |
1378 | ||
1da177e4 LT |
1379 | return; |
1380 | } | |
1381 | ||
cfc78c5a JV |
1382 | IP_VS_DBG_BUF(7, "DELeting control for: " |
1383 | "cp.dst=%s:%d ctl_cp.dst=%s:%d\n", | |
1384 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1385 | ntohs(cp->cport), | |
1386 | IP_VS_DBG_ADDR(cp->af, &ctl_cp->caddr), | |
1387 | ntohs(ctl_cp->cport)); | |
1da177e4 LT |
1388 | |
1389 | cp->control = NULL; | |
1390 | if (atomic_read(&ctl_cp->n_control) == 0) { | |
cfc78c5a JV |
1391 | IP_VS_ERR_BUF("BUG control DEL with n=0 : " |
1392 | "%s:%d to %s:%d\n", | |
1393 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1394 | ntohs(cp->cport), | |
1395 | IP_VS_DBG_ADDR(cp->af, &cp->vaddr), | |
1396 | ntohs(cp->vport)); | |
1397 | ||
1da177e4 LT |
1398 | return; |
1399 | } | |
1400 | atomic_dec(&ctl_cp->n_control); | |
1401 | } | |
1402 | ||
1403 | static inline void | |
1404 | ip_vs_control_add(struct ip_vs_conn *cp, struct ip_vs_conn *ctl_cp) | |
1405 | { | |
1406 | if (cp->control) { | |
cfc78c5a JV |
1407 | IP_VS_ERR_BUF("request control ADD for already controlled: " |
1408 | "%s:%d to %s:%d\n", | |
1409 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1410 | ntohs(cp->cport), | |
1411 | IP_VS_DBG_ADDR(cp->af, &cp->vaddr), | |
1412 | ntohs(cp->vport)); | |
1413 | ||
1da177e4 LT |
1414 | ip_vs_control_del(cp); |
1415 | } | |
1416 | ||
cfc78c5a JV |
1417 | IP_VS_DBG_BUF(7, "ADDing control for: " |
1418 | "cp.dst=%s:%d ctl_cp.dst=%s:%d\n", | |
1419 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1420 | ntohs(cp->cport), | |
1421 | IP_VS_DBG_ADDR(cp->af, &ctl_cp->caddr), | |
1422 | ntohs(ctl_cp->cport)); | |
1da177e4 LT |
1423 | |
1424 | cp->control = ctl_cp; | |
1425 | atomic_inc(&ctl_cp->n_control); | |
1426 | } | |
1427 | ||
27541143 JA |
1428 | /* Mark our template as assured */ |
1429 | static inline void | |
1430 | ip_vs_control_assure_ct(struct ip_vs_conn *cp) | |
1431 | { | |
1432 | struct ip_vs_conn *ct = cp->control; | |
1433 | ||
1434 | if (ct && !(ct->state & IP_VS_CTPL_S_ASSURED) && | |
1435 | (ct->flags & IP_VS_CONN_F_TEMPLATE)) | |
1436 | ct->state |= IP_VS_CTPL_S_ASSURED; | |
1437 | } | |
1438 | ||
07dcc686 | 1439 | /* IPVS netns init & cleanup functions */ |
a4dd0360 | 1440 | int ip_vs_estimator_net_init(struct netns_ipvs *ipvs); |
3d993766 | 1441 | int ip_vs_control_net_init(struct netns_ipvs *ipvs); |
7d1f88ec | 1442 | int ip_vs_protocol_net_init(struct netns_ipvs *ipvs); |
b5dd212c | 1443 | int ip_vs_app_net_init(struct netns_ipvs *ipvs); |
2f3edc6a | 1444 | int ip_vs_conn_net_init(struct netns_ipvs *ipvs); |
802cb437 | 1445 | int ip_vs_sync_net_init(struct netns_ipvs *ipvs); |
2f3edc6a | 1446 | void ip_vs_conn_net_cleanup(struct netns_ipvs *ipvs); |
b5dd212c | 1447 | void ip_vs_app_net_cleanup(struct netns_ipvs *ipvs); |
7d1f88ec | 1448 | void ip_vs_protocol_net_cleanup(struct netns_ipvs *ipvs); |
3d993766 | 1449 | void ip_vs_control_net_cleanup(struct netns_ipvs *ipvs); |
a4dd0360 | 1450 | void ip_vs_estimator_net_cleanup(struct netns_ipvs *ipvs); |
ebea1f7c | 1451 | void ip_vs_sync_net_cleanup(struct netns_ipvs *ipvs); |
5d5a0815 | 1452 | void ip_vs_service_nets_cleanup(struct list_head *net_list); |
1da177e4 | 1453 | |
07dcc686 SH |
1454 | /* IPVS application functions |
1455 | * (from ip_vs_app.c) | |
1da177e4 LT |
1456 | */ |
1457 | #define IP_VS_APP_MAX_PORTS 8 | |
9f8128a5 EB |
1458 | struct ip_vs_app *register_ip_vs_app(struct netns_ipvs *ipvs, struct ip_vs_app *app); |
1459 | void unregister_ip_vs_app(struct netns_ipvs *ipvs, struct ip_vs_app *app); | |
5c3a0fd7 JP |
1460 | int ip_vs_bind_app(struct ip_vs_conn *cp, struct ip_vs_protocol *pp); |
1461 | void ip_vs_unbind_app(struct ip_vs_conn *cp); | |
3250dc9c | 1462 | int register_ip_vs_app_inc(struct netns_ipvs *ipvs, struct ip_vs_app *app, __u16 proto, |
5c3a0fd7 JP |
1463 | __u16 port); |
1464 | int ip_vs_app_inc_get(struct ip_vs_app *inc); | |
1465 | void ip_vs_app_inc_put(struct ip_vs_app *inc); | |
1466 | ||
d12e1229 JA |
1467 | int ip_vs_app_pkt_out(struct ip_vs_conn *, struct sk_buff *skb, |
1468 | struct ip_vs_iphdr *ipvsh); | |
1469 | int ip_vs_app_pkt_in(struct ip_vs_conn *, struct sk_buff *skb, | |
1470 | struct ip_vs_iphdr *ipvsh); | |
1da177e4 | 1471 | |
8be67a66 SH |
1472 | int register_ip_vs_pe(struct ip_vs_pe *pe); |
1473 | int unregister_ip_vs_pe(struct ip_vs_pe *pe); | |
e9e5eee8 | 1474 | struct ip_vs_pe *ip_vs_pe_getbyname(const char *name); |
fe5e7a1e | 1475 | struct ip_vs_pe *__ip_vs_pe_getbyname(const char *pe_name); |
e9e5eee8 | 1476 | |
07dcc686 | 1477 | /* Use a #define to avoid all of module.h just for these trivial ops */ |
69e7dae4 PG |
1478 | #define ip_vs_pe_get(pe) \ |
1479 | if (pe && pe->module) \ | |
e9e5eee8 | 1480 | __module_get(pe->module); |
e9e5eee8 | 1481 | |
69e7dae4 PG |
1482 | #define ip_vs_pe_put(pe) \ |
1483 | if (pe && pe->module) \ | |
e9e5eee8 | 1484 | module_put(pe->module); |
1da177e4 | 1485 | |
07dcc686 | 1486 | /* IPVS protocol functions (from ip_vs_proto.c) */ |
5c3a0fd7 JP |
1487 | int ip_vs_protocol_init(void); |
1488 | void ip_vs_protocol_cleanup(void); | |
1489 | void ip_vs_protocol_timeout_change(struct netns_ipvs *ipvs, int flags); | |
1490 | int *ip_vs_create_timeout_table(int *table, int size); | |
5c3a0fd7 JP |
1491 | void ip_vs_tcpudp_debug_packet(int af, struct ip_vs_protocol *pp, |
1492 | const struct sk_buff *skb, int offset, | |
1493 | const char *msg); | |
1da177e4 LT |
1494 | |
1495 | extern struct ip_vs_protocol ip_vs_protocol_tcp; | |
1496 | extern struct ip_vs_protocol ip_vs_protocol_udp; | |
1497 | extern struct ip_vs_protocol ip_vs_protocol_icmp; | |
1498 | extern struct ip_vs_protocol ip_vs_protocol_esp; | |
1499 | extern struct ip_vs_protocol ip_vs_protocol_ah; | |
2906f66a | 1500 | extern struct ip_vs_protocol ip_vs_protocol_sctp; |
1da177e4 | 1501 | |
07dcc686 SH |
1502 | /* Registering/unregistering scheduler functions |
1503 | * (from ip_vs_sched.c) | |
1da177e4 | 1504 | */ |
5c3a0fd7 JP |
1505 | int register_ip_vs_scheduler(struct ip_vs_scheduler *scheduler); |
1506 | int unregister_ip_vs_scheduler(struct ip_vs_scheduler *scheduler); | |
1507 | int ip_vs_bind_scheduler(struct ip_vs_service *svc, | |
1508 | struct ip_vs_scheduler *scheduler); | |
1509 | void ip_vs_unbind_scheduler(struct ip_vs_service *svc, | |
1510 | struct ip_vs_scheduler *sched); | |
1511 | struct ip_vs_scheduler *ip_vs_scheduler_get(const char *sched_name); | |
1512 | void ip_vs_scheduler_put(struct ip_vs_scheduler *scheduler); | |
1513 | struct ip_vs_conn * | |
190ecd27 | 1514 | ip_vs_schedule(struct ip_vs_service *svc, struct sk_buff *skb, |
d4383f04 JDB |
1515 | struct ip_vs_proto_data *pd, int *ignored, |
1516 | struct ip_vs_iphdr *iph); | |
5c3a0fd7 JP |
1517 | int ip_vs_leave(struct ip_vs_service *svc, struct sk_buff *skb, |
1518 | struct ip_vs_proto_data *pd, struct ip_vs_iphdr *iph); | |
1da177e4 | 1519 | |
5c3a0fd7 | 1520 | void ip_vs_scheduler_err(struct ip_vs_service *svc, const char *msg); |
41ac51ee | 1521 | |
07dcc686 | 1522 | /* IPVS control data and functions (from ip_vs_ctl.c) */ |
1da177e4 | 1523 | extern struct ip_vs_stats ip_vs_stats; |
b880c1f0 | 1524 | extern int sysctl_ip_vs_sync_ver; |
1da177e4 | 1525 | |
5c3a0fd7 | 1526 | struct ip_vs_service * |
0a4fd6ce | 1527 | ip_vs_service_find(struct netns_ipvs *ipvs, int af, __u32 fwmark, __u16 protocol, |
3c2e0505 | 1528 | const union nf_inet_addr *vaddr, __be16 vport); |
1da177e4 | 1529 | |
48aed1b0 | 1530 | bool ip_vs_has_real_service(struct netns_ipvs *ipvs, int af, __u16 protocol, |
5c3a0fd7 JP |
1531 | const union nf_inet_addr *daddr, __be16 dport); |
1532 | ||
39b97223 MA |
1533 | struct ip_vs_dest * |
1534 | ip_vs_find_real_service(struct netns_ipvs *ipvs, int af, __u16 protocol, | |
1535 | const union nf_inet_addr *daddr, __be16 dport); | |
2aa3c9f4 JA |
1536 | struct ip_vs_dest *ip_vs_find_tunnel(struct netns_ipvs *ipvs, int af, |
1537 | const union nf_inet_addr *daddr, | |
1538 | __be16 tun_port); | |
39b97223 | 1539 | |
5c3a0fd7 JP |
1540 | int ip_vs_use_count_inc(void); |
1541 | void ip_vs_use_count_dec(void); | |
1542 | int ip_vs_register_nl_ioctl(void); | |
1543 | void ip_vs_unregister_nl_ioctl(void); | |
1544 | int ip_vs_control_init(void); | |
1545 | void ip_vs_control_cleanup(void); | |
1546 | struct ip_vs_dest * | |
dc2add6f | 1547 | ip_vs_find_dest(struct netns_ipvs *ipvs, int svc_af, int dest_af, |
655eef10 AG |
1548 | const union nf_inet_addr *daddr, __be16 dport, |
1549 | const union nf_inet_addr *vaddr, __be16 vport, | |
52793dbe | 1550 | __u16 protocol, __u32 fwmark, __u32 flags); |
5c3a0fd7 | 1551 | void ip_vs_try_bind_dest(struct ip_vs_conn *cp); |
1da177e4 | 1552 | |
fca9c20a JA |
1553 | static inline void ip_vs_dest_hold(struct ip_vs_dest *dest) |
1554 | { | |
b54ab92b | 1555 | refcount_inc(&dest->refcnt); |
fca9c20a JA |
1556 | } |
1557 | ||
1558 | static inline void ip_vs_dest_put(struct ip_vs_dest *dest) | |
1559 | { | |
4e857c58 | 1560 | smp_mb__before_atomic(); |
b54ab92b | 1561 | refcount_dec(&dest->refcnt); |
fca9c20a | 1562 | } |
1da177e4 | 1563 | |
9e4e948a JA |
1564 | static inline void ip_vs_dest_put_and_free(struct ip_vs_dest *dest) |
1565 | { | |
b54ab92b | 1566 | if (refcount_dec_and_test(&dest->refcnt)) |
9e4e948a JA |
1567 | kfree(dest); |
1568 | } | |
1569 | ||
07dcc686 SH |
1570 | /* IPVS sync daemon data and function prototypes |
1571 | * (from ip_vs_sync.c) | |
1da177e4 | 1572 | */ |
6ac121d7 | 1573 | int start_sync_thread(struct netns_ipvs *ipvs, struct ipvs_sync_daemon_cfg *cfg, |
e4ff6751 | 1574 | int state); |
b3cf3cbf | 1575 | int stop_sync_thread(struct netns_ipvs *ipvs, int state); |
b61a8c1a | 1576 | void ip_vs_sync_conn(struct netns_ipvs *ipvs, struct ip_vs_conn *cp, int pkts); |
1da177e4 | 1577 | |
07dcc686 | 1578 | /* IPVS rate estimator prototypes (from ip_vs_est.c) */ |
705dd344 | 1579 | int ip_vs_start_estimator(struct netns_ipvs *ipvs, struct ip_vs_stats *stats); |
0f34d54b | 1580 | void ip_vs_stop_estimator(struct netns_ipvs *ipvs, struct ip_vs_stats *stats); |
5c3a0fd7 | 1581 | void ip_vs_zero_estimator(struct ip_vs_stats *stats); |
cd67cd5e | 1582 | void ip_vs_read_estimator(struct ip_vs_kstats *dst, struct ip_vs_stats *stats); |
705dd344 JA |
1583 | void ip_vs_est_reload_start(struct netns_ipvs *ipvs); |
1584 | int ip_vs_est_kthread_start(struct netns_ipvs *ipvs, | |
1585 | struct ip_vs_est_kt_data *kd); | |
1586 | void ip_vs_est_kthread_stop(struct ip_vs_est_kt_data *kd); | |
1da177e4 | 1587 | |
f0be83d5 JA |
1588 | static inline void ip_vs_est_stopped_recalc(struct netns_ipvs *ipvs) |
1589 | { | |
1590 | #ifdef CONFIG_SYSCTL | |
144361c1 JA |
1591 | /* Stop tasks while cpulist is empty or if disabled with flag */ |
1592 | ipvs->est_stopped = !sysctl_run_estimation(ipvs) || | |
1593 | (ipvs->est_cpulist_valid && | |
1594 | cpumask_empty(sysctl_est_cpulist(ipvs))); | |
f0be83d5 JA |
1595 | #endif |
1596 | } | |
1597 | ||
1598 | static inline bool ip_vs_est_stopped(struct netns_ipvs *ipvs) | |
1599 | { | |
1600 | #ifdef CONFIG_SYSCTL | |
1601 | return ipvs->est_stopped; | |
1602 | #else | |
1603 | return false; | |
1604 | #endif | |
1605 | } | |
1606 | ||
1607 | static inline int ip_vs_est_max_threads(struct netns_ipvs *ipvs) | |
1608 | { | |
1609 | unsigned int limit = IPVS_EST_CPU_KTHREADS * | |
1610 | cpumask_weight(sysctl_est_cpulist(ipvs)); | |
1611 | ||
1612 | return max(1U, limit); | |
1613 | } | |
1614 | ||
07dcc686 | 1615 | /* Various IPVS packet transmitters (from ip_vs_xmit.c) */ |
5c3a0fd7 JP |
1616 | int ip_vs_null_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, |
1617 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1618 | int ip_vs_bypass_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1619 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1620 | int ip_vs_nat_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1621 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1622 | int ip_vs_tunnel_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1623 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1624 | int ip_vs_dr_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1625 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1626 | int ip_vs_icmp_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1627 | struct ip_vs_protocol *pp, int offset, | |
1628 | unsigned int hooknum, struct ip_vs_iphdr *iph); | |
1629 | void ip_vs_dest_dst_rcu_free(struct rcu_head *head); | |
1da177e4 | 1630 | |
b3cdd2a7 | 1631 | #ifdef CONFIG_IP_VS_IPV6 |
5c3a0fd7 JP |
1632 | int ip_vs_bypass_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, |
1633 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1634 | int ip_vs_nat_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1635 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1636 | int ip_vs_tunnel_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1637 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1638 | int ip_vs_dr_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1639 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1640 | int ip_vs_icmp_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1641 | struct ip_vs_protocol *pp, int offset, | |
1642 | unsigned int hooknum, struct ip_vs_iphdr *iph); | |
b3cdd2a7 | 1643 | #endif |
1da177e4 | 1644 | |
3a1bbf18 | 1645 | #ifdef CONFIG_SYSCTL |
07dcc686 SH |
1646 | /* This is a simple mechanism to ignore packets when |
1647 | * we are loaded. Just set ip_vs_drop_rate to 'n' and | |
1648 | * we start to drop 1/rate of the packets | |
1da177e4 | 1649 | */ |
a0840e2e | 1650 | static inline int ip_vs_todrop(struct netns_ipvs *ipvs) |
1da177e4 | 1651 | { |
a0840e2e HS |
1652 | if (!ipvs->drop_rate) |
1653 | return 0; | |
1654 | if (--ipvs->drop_counter > 0) | |
1655 | return 0; | |
1656 | ipvs->drop_counter = ipvs->drop_rate; | |
1da177e4 LT |
1657 | return 1; |
1658 | } | |
3a1bbf18 SH |
1659 | #else |
1660 | static inline int ip_vs_todrop(struct netns_ipvs *ipvs) { return 0; } | |
1661 | #endif | |
1da177e4 | 1662 | |
35dfb013 ASK |
1663 | #ifdef CONFIG_SYSCTL |
1664 | /* Enqueue delayed work for expiring no dest connections | |
1665 | * Only run when sysctl_expire_nodest=1 | |
1666 | */ | |
1667 | static inline void ip_vs_enqueue_expire_nodest_conns(struct netns_ipvs *ipvs) | |
1668 | { | |
1669 | if (sysctl_expire_nodest_conn(ipvs)) | |
1670 | queue_delayed_work(system_long_wq, | |
1671 | &ipvs->expire_nodest_conn_work, 1); | |
1672 | } | |
1673 | ||
1674 | void ip_vs_expire_nodest_conn_flush(struct netns_ipvs *ipvs); | |
1675 | #else | |
1676 | static inline void ip_vs_enqueue_expire_nodest_conns(struct netns_ipvs *ipvs) {} | |
1677 | #endif | |
1678 | ||
1da40ab6 JA |
1679 | #define IP_VS_DFWD_METHOD(dest) (atomic_read(&(dest)->conn_flags) & \ |
1680 | IP_VS_CONN_F_FWD_MASK) | |
1681 | ||
07dcc686 | 1682 | /* ip_vs_fwd_tag returns the forwarding tag of the connection */ |
1da177e4 LT |
1683 | #define IP_VS_FWD_METHOD(cp) (cp->flags & IP_VS_CONN_F_FWD_MASK) |
1684 | ||
732db659 | 1685 | static inline char ip_vs_fwd_tag(struct ip_vs_conn *cp) |
1da177e4 LT |
1686 | { |
1687 | char fwd; | |
1688 | ||
1689 | switch (IP_VS_FWD_METHOD(cp)) { | |
1690 | case IP_VS_CONN_F_MASQ: | |
1691 | fwd = 'M'; break; | |
1692 | case IP_VS_CONN_F_LOCALNODE: | |
1693 | fwd = 'L'; break; | |
1694 | case IP_VS_CONN_F_TUNNEL: | |
1695 | fwd = 'T'; break; | |
1696 | case IP_VS_CONN_F_DROUTE: | |
1697 | fwd = 'R'; break; | |
1698 | case IP_VS_CONN_F_BYPASS: | |
1699 | fwd = 'B'; break; | |
1700 | default: | |
1701 | fwd = '?'; break; | |
1702 | } | |
1703 | return fwd; | |
1704 | } | |
1705 | ||
5c3a0fd7 JP |
1706 | void ip_vs_nat_icmp(struct sk_buff *skb, struct ip_vs_protocol *pp, |
1707 | struct ip_vs_conn *cp, int dir); | |
b3cdd2a7 JV |
1708 | |
1709 | #ifdef CONFIG_IP_VS_IPV6 | |
5c3a0fd7 JP |
1710 | void ip_vs_nat_icmp_v6(struct sk_buff *skb, struct ip_vs_protocol *pp, |
1711 | struct ip_vs_conn *cp, int dir); | |
b3cdd2a7 | 1712 | #endif |
1da177e4 | 1713 | |
5c3a0fd7 | 1714 | __sum16 ip_vs_checksum_complete(struct sk_buff *skb, int offset); |
1da177e4 | 1715 | |
f9214b26 | 1716 | static inline __wsum ip_vs_check_diff4(__be32 old, __be32 new, __wsum oldsum) |
1da177e4 | 1717 | { |
f9214b26 | 1718 | __be32 diff[2] = { ~old, new }; |
1da177e4 | 1719 | |
07f0757a | 1720 | return csum_partial(diff, sizeof(diff), oldsum); |
f9214b26 AV |
1721 | } |
1722 | ||
0bbdd42b JV |
1723 | #ifdef CONFIG_IP_VS_IPV6 |
1724 | static inline __wsum ip_vs_check_diff16(const __be32 *old, const __be32 *new, | |
1725 | __wsum oldsum) | |
1726 | { | |
1727 | __be32 diff[8] = { ~old[3], ~old[2], ~old[1], ~old[0], | |
1728 | new[3], new[2], new[1], new[0] }; | |
1729 | ||
07f0757a | 1730 | return csum_partial(diff, sizeof(diff), oldsum); |
0bbdd42b JV |
1731 | } |
1732 | #endif | |
1733 | ||
f9214b26 AV |
1734 | static inline __wsum ip_vs_check_diff2(__be16 old, __be16 new, __wsum oldsum) |
1735 | { | |
1736 | __be16 diff[2] = { ~old, new }; | |
1737 | ||
07f0757a | 1738 | return csum_partial(diff, sizeof(diff), oldsum); |
1da177e4 LT |
1739 | } |
1740 | ||
07dcc686 | 1741 | /* Forget current conntrack (unconfirmed) and attach notrack entry */ |
cf356d69 JA |
1742 | static inline void ip_vs_notrack(struct sk_buff *skb) |
1743 | { | |
1744 | #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) | |
1745 | enum ip_conntrack_info ctinfo; | |
06b69390 | 1746 | struct nf_conn *ct = nf_ct_get(skb, &ctinfo); |
cf356d69 | 1747 | |
ab8bc7ed | 1748 | if (ct) { |
97a6ad13 | 1749 | nf_conntrack_put(&ct->ct_general); |
cc41c84b | 1750 | nf_ct_set(skb, NULL, IP_CT_UNTRACKED); |
cf356d69 JA |
1751 | } |
1752 | #endif | |
1753 | } | |
1754 | ||
f4bc17cd | 1755 | #ifdef CONFIG_IP_VS_NFCT |
07dcc686 SH |
1756 | /* Netfilter connection tracking |
1757 | * (from ip_vs_nfct.c) | |
f4bc17cd | 1758 | */ |
a0840e2e | 1759 | static inline int ip_vs_conntrack_enabled(struct netns_ipvs *ipvs) |
f4bc17cd | 1760 | { |
a4e2f5a7 | 1761 | #ifdef CONFIG_SYSCTL |
a0840e2e | 1762 | return ipvs->sysctl_conntrack; |
a4e2f5a7 SH |
1763 | #else |
1764 | return 0; | |
1765 | #endif | |
f4bc17cd JA |
1766 | } |
1767 | ||
5c3a0fd7 JP |
1768 | void ip_vs_update_conntrack(struct sk_buff *skb, struct ip_vs_conn *cp, |
1769 | int outin); | |
1770 | int ip_vs_confirm_conntrack(struct sk_buff *skb); | |
1771 | void ip_vs_nfct_expect_related(struct sk_buff *skb, struct nf_conn *ct, | |
1772 | struct ip_vs_conn *cp, u_int8_t proto, | |
1773 | const __be16 port, int from_rs); | |
1774 | void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp); | |
f4bc17cd JA |
1775 | |
1776 | #else | |
1777 | ||
a0840e2e | 1778 | static inline int ip_vs_conntrack_enabled(struct netns_ipvs *ipvs) |
f4bc17cd JA |
1779 | { |
1780 | return 0; | |
1781 | } | |
1782 | ||
1783 | static inline void ip_vs_update_conntrack(struct sk_buff *skb, | |
1784 | struct ip_vs_conn *cp, int outin) | |
1785 | { | |
1786 | } | |
1787 | ||
e23ebf0f | 1788 | static inline int ip_vs_confirm_conntrack(struct sk_buff *skb) |
f4bc17cd JA |
1789 | { |
1790 | return NF_ACCEPT; | |
1791 | } | |
1792 | ||
1793 | static inline void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp) | |
1794 | { | |
1795 | } | |
07dcc686 | 1796 | #endif /* CONFIG_IP_VS_NFCT */ |
6523ce15 | 1797 | |
f0a5e4d7 JA |
1798 | /* Using old conntrack that can not be redirected to another real server? */ |
1799 | static inline bool ip_vs_conn_uses_old_conntrack(struct ip_vs_conn *cp, | |
1800 | struct sk_buff *skb) | |
f719e375 JA |
1801 | { |
1802 | #ifdef CONFIG_IP_VS_NFCT | |
1803 | enum ip_conntrack_info ctinfo; | |
1804 | struct nf_conn *ct; | |
1805 | ||
f719e375 | 1806 | ct = nf_ct_get(skb, &ctinfo); |
f0a5e4d7 | 1807 | if (ct && nf_ct_is_confirmed(ct)) |
f719e375 JA |
1808 | return true; |
1809 | #endif | |
1810 | return false; | |
1811 | } | |
1812 | ||
31875d49 JA |
1813 | static inline int ip_vs_register_conntrack(struct ip_vs_service *svc) |
1814 | { | |
1815 | #if IS_ENABLED(CONFIG_NF_CONNTRACK) | |
1816 | int afmask = (svc->af == AF_INET6) ? 2 : 1; | |
1817 | int ret = 0; | |
1818 | ||
1819 | if (!(svc->conntrack_afmask & afmask)) { | |
1820 | ret = nf_ct_netns_get(svc->ipvs->net, svc->af); | |
1821 | if (ret >= 0) | |
1822 | svc->conntrack_afmask |= afmask; | |
1823 | } | |
1824 | return ret; | |
1825 | #else | |
1826 | return 0; | |
1827 | #endif | |
1828 | } | |
1829 | ||
1830 | static inline void ip_vs_unregister_conntrack(struct ip_vs_service *svc) | |
1831 | { | |
1832 | #if IS_ENABLED(CONFIG_NF_CONNTRACK) | |
1833 | int afmask = (svc->af == AF_INET6) ? 2 : 1; | |
1834 | ||
1835 | if (svc->conntrack_afmask & afmask) { | |
1836 | nf_ct_netns_put(svc->ipvs->net, svc->af); | |
1837 | svc->conntrack_afmask &= ~afmask; | |
1838 | } | |
1839 | #endif | |
1840 | } | |
1841 | ||
857ca897 JA |
1842 | int ip_vs_register_hooks(struct netns_ipvs *ipvs, unsigned int af); |
1843 | void ip_vs_unregister_hooks(struct netns_ipvs *ipvs, unsigned int af); | |
1844 | ||
c16526a7 | 1845 | static inline int |
b552f7e3 CG |
1846 | ip_vs_dest_conn_overhead(struct ip_vs_dest *dest) |
1847 | { | |
07dcc686 | 1848 | /* We think the overhead of processing active connections is 256 |
b552f7e3 CG |
1849 | * times higher than that of inactive connections in average. (This |
1850 | * 256 times might not be accurate, we will change it later) We | |
1851 | * use the following formula to estimate the overhead now: | |
1852 | * dest->activeconns*256 + dest->inactconns | |
1853 | */ | |
1854 | return (atomic_read(&dest->activeconns) << 8) + | |
1855 | atomic_read(&dest->inactconns); | |
1856 | } | |
1857 | ||
edf597da LR |
1858 | #ifdef CONFIG_IP_VS_PROTO_TCP |
1859 | INDIRECT_CALLABLE_DECLARE(int | |
1860 | tcp_snat_handler(struct sk_buff *skb, struct ip_vs_protocol *pp, | |
1861 | struct ip_vs_conn *cp, struct ip_vs_iphdr *iph)); | |
1862 | #endif | |
1863 | ||
1864 | #ifdef CONFIG_IP_VS_PROTO_UDP | |
1865 | INDIRECT_CALLABLE_DECLARE(int | |
1866 | udp_snat_handler(struct sk_buff *skb, struct ip_vs_protocol *pp, | |
1867 | struct ip_vs_conn *cp, struct ip_vs_iphdr *iph)); | |
1868 | #endif | |
bc4768eb | 1869 | #endif /* _NET_IP_VS_H */ |