Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * IPVS An implementation of the IP virtual server support for the | |
3 | * LINUX operating system. IPVS is now implemented as a module | |
4 | * over the Netfilter framework. IPVS can be used to build a | |
5 | * high-performance and highly available server based on a | |
6 | * cluster of servers. | |
7 | * | |
1da177e4 LT |
8 | * Authors: Wensong Zhang <wensong@linuxvirtualserver.org> |
9 | * Peter Kese <peter.kese@ijs.si> | |
10 | * Julian Anastasov <ja@ssi.bg> | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or | |
13 | * modify it under the terms of the GNU General Public License | |
14 | * as published by the Free Software Foundation; either version | |
15 | * 2 of the License, or (at your option) any later version. | |
16 | * | |
17 | * The IPVS code for kernel 2.2 was done by Wensong Zhang and Peter Kese, | |
18 | * with changes/fixes from Julian Anastasov, Lars Marowsky-Bree, Horms | |
19 | * and others. Many code here is taken from IP MASQ code of kernel 2.2. | |
20 | * | |
21 | * Changes: | |
22 | * | |
23 | */ | |
24 | ||
9aada7ac HE |
25 | #define KMSG_COMPONENT "IPVS" |
26 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
27 | ||
e924283b | 28 | #include <linux/interrupt.h> |
14c85021 | 29 | #include <linux/in.h> |
f18ae720 | 30 | #include <linux/inet.h> |
f190055f | 31 | #include <linux/net.h> |
1da177e4 | 32 | #include <linux/kernel.h> |
14c85021 | 33 | #include <linux/module.h> |
1da177e4 LT |
34 | #include <linux/vmalloc.h> |
35 | #include <linux/proc_fs.h> /* for proc_net_* */ | |
5a0e3ad6 | 36 | #include <linux/slab.h> |
1da177e4 LT |
37 | #include <linux/seq_file.h> |
38 | #include <linux/jhash.h> | |
39 | #include <linux/random.h> | |
40 | ||
457c4cbc | 41 | #include <net/net_namespace.h> |
1da177e4 LT |
42 | #include <net/ip_vs.h> |
43 | ||
44 | ||
6f7edb48 CB |
45 | #ifndef CONFIG_IP_VS_TAB_BITS |
46 | #define CONFIG_IP_VS_TAB_BITS 12 | |
47 | #endif | |
48 | ||
49 | /* | |
50 | * Connection hash size. Default is what was selected at compile time. | |
51 | */ | |
4ecd2944 | 52 | static int ip_vs_conn_tab_bits = CONFIG_IP_VS_TAB_BITS; |
6f7edb48 CB |
53 | module_param_named(conn_tab_bits, ip_vs_conn_tab_bits, int, 0444); |
54 | MODULE_PARM_DESC(conn_tab_bits, "Set connections' hash size"); | |
55 | ||
56 | /* size and mask values */ | |
4ecd2944 ED |
57 | int ip_vs_conn_tab_size __read_mostly; |
58 | static int ip_vs_conn_tab_mask __read_mostly; | |
6f7edb48 | 59 | |
1da177e4 LT |
60 | /* |
61 | * Connection hash table: for input and output packets lookups of IPVS | |
62 | */ | |
731109e7 | 63 | static struct hlist_head *ip_vs_conn_tab __read_mostly; |
1da177e4 LT |
64 | |
65 | /* SLAB cache for IPVS connections */ | |
e18b890b | 66 | static struct kmem_cache *ip_vs_conn_cachep __read_mostly; |
1da177e4 | 67 | |
1da177e4 LT |
68 | /* counter for no client port connections */ |
69 | static atomic_t ip_vs_conn_no_cport_cnt = ATOMIC_INIT(0); | |
70 | ||
71 | /* random value for IPVS connection hash */ | |
4ecd2944 | 72 | static unsigned int ip_vs_conn_rnd __read_mostly; |
1da177e4 LT |
73 | |
74 | /* | |
75 | * Fine locking granularity for big connection hash table | |
76 | */ | |
6e67e586 | 77 | #define CT_LOCKARRAY_BITS 5 |
1da177e4 LT |
78 | #define CT_LOCKARRAY_SIZE (1<<CT_LOCKARRAY_BITS) |
79 | #define CT_LOCKARRAY_MASK (CT_LOCKARRAY_SIZE-1) | |
80 | ||
f18ae720 JA |
81 | /* We need an addrstrlen that works with or without v6 */ |
82 | #ifdef CONFIG_IP_VS_IPV6 | |
83 | #define IP_VS_ADDRSTRLEN INET6_ADDRSTRLEN | |
84 | #else | |
85 | #define IP_VS_ADDRSTRLEN (8+1) | |
86 | #endif | |
87 | ||
1da177e4 LT |
88 | struct ip_vs_aligned_lock |
89 | { | |
088339a5 | 90 | spinlock_t l; |
1da177e4 LT |
91 | } __attribute__((__aligned__(SMP_CACHE_BYTES))); |
92 | ||
93 | /* lock array for conn table */ | |
94 | static struct ip_vs_aligned_lock | |
95 | __ip_vs_conntbl_lock_array[CT_LOCKARRAY_SIZE] __cacheline_aligned; | |
96 | ||
ac69269a | 97 | static inline void ct_write_lock_bh(unsigned int key) |
1da177e4 | 98 | { |
ac69269a | 99 | spin_lock_bh(&__ip_vs_conntbl_lock_array[key&CT_LOCKARRAY_MASK].l); |
1da177e4 LT |
100 | } |
101 | ||
ac69269a | 102 | static inline void ct_write_unlock_bh(unsigned int key) |
1da177e4 | 103 | { |
ac69269a | 104 | spin_unlock_bh(&__ip_vs_conntbl_lock_array[key&CT_LOCKARRAY_MASK].l); |
1da177e4 LT |
105 | } |
106 | ||
013b0424 | 107 | static void ip_vs_conn_expire(unsigned long data); |
1da177e4 LT |
108 | |
109 | /* | |
110 | * Returns hash value for IPVS connection entry | |
111 | */ | |
754b81a3 | 112 | static unsigned int ip_vs_conn_hashkey(struct netns_ipvs *ipvs, int af, unsigned int proto, |
28364a59 JV |
113 | const union nf_inet_addr *addr, |
114 | __be16 port) | |
1da177e4 | 115 | { |
28364a59 JV |
116 | #ifdef CONFIG_IP_VS_IPV6 |
117 | if (af == AF_INET6) | |
6e67e586 HS |
118 | return (jhash_3words(jhash(addr, 16, ip_vs_conn_rnd), |
119 | (__force u32)port, proto, ip_vs_conn_rnd) ^ | |
754b81a3 | 120 | ((size_t)ipvs>>8)) & ip_vs_conn_tab_mask; |
28364a59 | 121 | #endif |
6e67e586 HS |
122 | return (jhash_3words((__force u32)addr->ip, (__force u32)port, proto, |
123 | ip_vs_conn_rnd) ^ | |
754b81a3 | 124 | ((size_t)ipvs>>8)) & ip_vs_conn_tab_mask; |
1da177e4 LT |
125 | } |
126 | ||
85999283 SH |
127 | static unsigned int ip_vs_conn_hashkey_param(const struct ip_vs_conn_param *p, |
128 | bool inverse) | |
129 | { | |
130 | const union nf_inet_addr *addr; | |
131 | __be16 port; | |
132 | ||
f71499aa | 133 | if (p->pe_data && p->pe->hashkey_raw) |
85999283 SH |
134 | return p->pe->hashkey_raw(p, ip_vs_conn_rnd, inverse) & |
135 | ip_vs_conn_tab_mask; | |
136 | ||
137 | if (likely(!inverse)) { | |
138 | addr = p->caddr; | |
139 | port = p->cport; | |
140 | } else { | |
141 | addr = p->vaddr; | |
142 | port = p->vport; | |
143 | } | |
144 | ||
754b81a3 | 145 | return ip_vs_conn_hashkey(p->ipvs, p->af, p->protocol, addr, port); |
85999283 SH |
146 | } |
147 | ||
148 | static unsigned int ip_vs_conn_hashkey_conn(const struct ip_vs_conn *cp) | |
149 | { | |
150 | struct ip_vs_conn_param p; | |
151 | ||
19913dec | 152 | ip_vs_conn_fill_param(cp->ipvs, cp->af, cp->protocol, |
6e67e586 | 153 | &cp->caddr, cp->cport, NULL, 0, &p); |
85999283 | 154 | |
e9e5eee8 SH |
155 | if (cp->pe) { |
156 | p.pe = cp->pe; | |
85999283 SH |
157 | p.pe_data = cp->pe_data; |
158 | p.pe_data_len = cp->pe_data_len; | |
159 | } | |
160 | ||
161 | return ip_vs_conn_hashkey_param(&p, false); | |
162 | } | |
1da177e4 LT |
163 | |
164 | /* | |
6e67e586 | 165 | * Hashes ip_vs_conn in ip_vs_conn_tab by netns,proto,addr,port. |
1da177e4 LT |
166 | * returns bool success. |
167 | */ | |
168 | static inline int ip_vs_conn_hash(struct ip_vs_conn *cp) | |
169 | { | |
95c96174 | 170 | unsigned int hash; |
1da177e4 LT |
171 | int ret; |
172 | ||
26ec037f NC |
173 | if (cp->flags & IP_VS_CONN_F_ONE_PACKET) |
174 | return 0; | |
175 | ||
1da177e4 | 176 | /* Hash by protocol, client address and port */ |
85999283 | 177 | hash = ip_vs_conn_hashkey_conn(cp); |
1da177e4 | 178 | |
ac69269a | 179 | ct_write_lock_bh(hash); |
aea9d711 | 180 | spin_lock(&cp->lock); |
1da177e4 LT |
181 | |
182 | if (!(cp->flags & IP_VS_CONN_F_HASHED)) { | |
1da177e4 LT |
183 | cp->flags |= IP_VS_CONN_F_HASHED; |
184 | atomic_inc(&cp->refcnt); | |
088339a5 | 185 | hlist_add_head_rcu(&cp->c_list, &ip_vs_conn_tab[hash]); |
1da177e4 LT |
186 | ret = 1; |
187 | } else { | |
1e3e238e HE |
188 | pr_err("%s(): request for already hashed, called from %pF\n", |
189 | __func__, __builtin_return_address(0)); | |
1da177e4 LT |
190 | ret = 0; |
191 | } | |
192 | ||
aea9d711 | 193 | spin_unlock(&cp->lock); |
ac69269a | 194 | ct_write_unlock_bh(hash); |
1da177e4 LT |
195 | |
196 | return ret; | |
197 | } | |
198 | ||
199 | ||
200 | /* | |
201 | * UNhashes ip_vs_conn from ip_vs_conn_tab. | |
088339a5 | 202 | * returns bool success. Caller should hold conn reference. |
1da177e4 LT |
203 | */ |
204 | static inline int ip_vs_conn_unhash(struct ip_vs_conn *cp) | |
205 | { | |
95c96174 | 206 | unsigned int hash; |
1da177e4 LT |
207 | int ret; |
208 | ||
209 | /* unhash it and decrease its reference counter */ | |
85999283 | 210 | hash = ip_vs_conn_hashkey_conn(cp); |
1da177e4 | 211 | |
ac69269a | 212 | ct_write_lock_bh(hash); |
aea9d711 | 213 | spin_lock(&cp->lock); |
1da177e4 LT |
214 | |
215 | if (cp->flags & IP_VS_CONN_F_HASHED) { | |
088339a5 | 216 | hlist_del_rcu(&cp->c_list); |
1da177e4 LT |
217 | cp->flags &= ~IP_VS_CONN_F_HASHED; |
218 | atomic_dec(&cp->refcnt); | |
219 | ret = 1; | |
220 | } else | |
221 | ret = 0; | |
222 | ||
aea9d711 | 223 | spin_unlock(&cp->lock); |
ac69269a | 224 | ct_write_unlock_bh(hash); |
1da177e4 LT |
225 | |
226 | return ret; | |
227 | } | |
228 | ||
088339a5 JA |
229 | /* Try to unlink ip_vs_conn from ip_vs_conn_tab. |
230 | * returns bool success. | |
231 | */ | |
232 | static inline bool ip_vs_conn_unlink(struct ip_vs_conn *cp) | |
233 | { | |
234 | unsigned int hash; | |
235 | bool ret; | |
236 | ||
237 | hash = ip_vs_conn_hashkey_conn(cp); | |
238 | ||
ac69269a | 239 | ct_write_lock_bh(hash); |
088339a5 JA |
240 | spin_lock(&cp->lock); |
241 | ||
242 | if (cp->flags & IP_VS_CONN_F_HASHED) { | |
243 | ret = false; | |
244 | /* Decrease refcnt and unlink conn only if we are last user */ | |
245 | if (atomic_cmpxchg(&cp->refcnt, 1, 0) == 1) { | |
246 | hlist_del_rcu(&cp->c_list); | |
247 | cp->flags &= ~IP_VS_CONN_F_HASHED; | |
248 | ret = true; | |
249 | } | |
250 | } else | |
251 | ret = atomic_read(&cp->refcnt) ? false : true; | |
252 | ||
253 | spin_unlock(&cp->lock); | |
ac69269a | 254 | ct_write_unlock_bh(hash); |
088339a5 JA |
255 | |
256 | return ret; | |
257 | } | |
258 | ||
1da177e4 LT |
259 | |
260 | /* | |
261 | * Gets ip_vs_conn associated with supplied parameters in the ip_vs_conn_tab. | |
262 | * Called for pkts coming from OUTside-to-INside. | |
f11017ec SH |
263 | * p->caddr, p->cport: pkt source address (foreign host) |
264 | * p->vaddr, p->vport: pkt dest address (load balancer) | |
1da177e4 | 265 | */ |
f11017ec SH |
266 | static inline struct ip_vs_conn * |
267 | __ip_vs_conn_in_get(const struct ip_vs_conn_param *p) | |
1da177e4 | 268 | { |
95c96174 | 269 | unsigned int hash; |
1da177e4 LT |
270 | struct ip_vs_conn *cp; |
271 | ||
85999283 | 272 | hash = ip_vs_conn_hashkey_param(p, false); |
1da177e4 | 273 | |
088339a5 | 274 | rcu_read_lock(); |
1da177e4 | 275 | |
088339a5 | 276 | hlist_for_each_entry_rcu(cp, &ip_vs_conn_tab[hash], c_list) { |
1845ed0b JA |
277 | if (p->cport == cp->cport && p->vport == cp->vport && |
278 | cp->af == p->af && | |
f11017ec SH |
279 | ip_vs_addr_equal(p->af, p->caddr, &cp->caddr) && |
280 | ip_vs_addr_equal(p->af, p->vaddr, &cp->vaddr) && | |
f11017ec | 281 | ((!p->cport) ^ (!(cp->flags & IP_VS_CONN_F_NO_CPORT))) && |
6e67e586 | 282 | p->protocol == cp->protocol && |
e64e2b46 | 283 | cp->ipvs == p->ipvs) { |
088339a5 JA |
284 | if (!__ip_vs_conn_get(cp)) |
285 | continue; | |
1da177e4 | 286 | /* HIT */ |
088339a5 | 287 | rcu_read_unlock(); |
1da177e4 LT |
288 | return cp; |
289 | } | |
290 | } | |
291 | ||
088339a5 | 292 | rcu_read_unlock(); |
1da177e4 LT |
293 | |
294 | return NULL; | |
295 | } | |
296 | ||
f11017ec | 297 | struct ip_vs_conn *ip_vs_conn_in_get(const struct ip_vs_conn_param *p) |
1da177e4 LT |
298 | { |
299 | struct ip_vs_conn *cp; | |
300 | ||
f11017ec SH |
301 | cp = __ip_vs_conn_in_get(p); |
302 | if (!cp && atomic_read(&ip_vs_conn_no_cport_cnt)) { | |
303 | struct ip_vs_conn_param cport_zero_p = *p; | |
304 | cport_zero_p.cport = 0; | |
305 | cp = __ip_vs_conn_in_get(&cport_zero_p); | |
306 | } | |
1da177e4 | 307 | |
28364a59 | 308 | IP_VS_DBG_BUF(9, "lookup/in %s %s:%d->%s:%d %s\n", |
f11017ec SH |
309 | ip_vs_proto_name(p->protocol), |
310 | IP_VS_DBG_ADDR(p->af, p->caddr), ntohs(p->cport), | |
311 | IP_VS_DBG_ADDR(p->af, p->vaddr), ntohs(p->vport), | |
28364a59 | 312 | cp ? "hit" : "not hit"); |
1da177e4 LT |
313 | |
314 | return cp; | |
315 | } | |
316 | ||
f11017ec | 317 | static int |
f5099dd4 EB |
318 | ip_vs_conn_fill_param_proto(struct netns_ipvs *ipvs, |
319 | int af, const struct sk_buff *skb, | |
f11017ec | 320 | const struct ip_vs_iphdr *iph, |
802c41ad | 321 | struct ip_vs_conn_param *p) |
f11017ec SH |
322 | { |
323 | __be16 _ports[2], *pptr; | |
324 | ||
d4383f04 | 325 | pptr = frag_safe_skb_hp(skb, iph->len, sizeof(_ports), _ports, iph); |
f11017ec SH |
326 | if (pptr == NULL) |
327 | return 1; | |
328 | ||
802c41ad | 329 | if (likely(!ip_vs_iph_inverse(iph))) |
19913dec | 330 | ip_vs_conn_fill_param(ipvs, af, iph->protocol, &iph->saddr, |
6e67e586 | 331 | pptr[0], &iph->daddr, pptr[1], p); |
f11017ec | 332 | else |
19913dec | 333 | ip_vs_conn_fill_param(ipvs, af, iph->protocol, &iph->daddr, |
6e67e586 | 334 | pptr[1], &iph->saddr, pptr[0], p); |
f11017ec SH |
335 | return 0; |
336 | } | |
337 | ||
5c0d2374 | 338 | struct ip_vs_conn * |
ab161976 EB |
339 | ip_vs_conn_in_get_proto(struct netns_ipvs *ipvs, int af, |
340 | const struct sk_buff *skb, | |
802c41ad | 341 | const struct ip_vs_iphdr *iph) |
5c0d2374 | 342 | { |
f11017ec | 343 | struct ip_vs_conn_param p; |
5c0d2374 | 344 | |
f5099dd4 | 345 | if (ip_vs_conn_fill_param_proto(ipvs, af, skb, iph, &p)) |
5c0d2374 SH |
346 | return NULL; |
347 | ||
f11017ec | 348 | return ip_vs_conn_in_get(&p); |
5c0d2374 SH |
349 | } |
350 | EXPORT_SYMBOL_GPL(ip_vs_conn_in_get_proto); | |
351 | ||
87375ab4 | 352 | /* Get reference to connection template */ |
f11017ec | 353 | struct ip_vs_conn *ip_vs_ct_in_get(const struct ip_vs_conn_param *p) |
87375ab4 | 354 | { |
95c96174 | 355 | unsigned int hash; |
87375ab4 JA |
356 | struct ip_vs_conn *cp; |
357 | ||
85999283 | 358 | hash = ip_vs_conn_hashkey_param(p, false); |
87375ab4 | 359 | |
088339a5 | 360 | rcu_read_lock(); |
87375ab4 | 361 | |
088339a5 | 362 | hlist_for_each_entry_rcu(cp, &ip_vs_conn_tab[hash], c_list) { |
1845ed0b | 363 | if (unlikely(p->pe_data && p->pe->ct_match)) { |
e64e2b46 | 364 | if (cp->ipvs != p->ipvs) |
1845ed0b | 365 | continue; |
088339a5 JA |
366 | if (p->pe == cp->pe && p->pe->ct_match(p, cp)) { |
367 | if (__ip_vs_conn_get(cp)) | |
368 | goto out; | |
369 | } | |
85999283 SH |
370 | continue; |
371 | } | |
372 | ||
f11017ec SH |
373 | if (cp->af == p->af && |
374 | ip_vs_addr_equal(p->af, p->caddr, &cp->caddr) && | |
be8be9ec | 375 | /* protocol should only be IPPROTO_IP if |
f11017ec SH |
376 | * p->vaddr is a fwmark */ |
377 | ip_vs_addr_equal(p->protocol == IPPROTO_IP ? AF_UNSPEC : | |
378 | p->af, p->vaddr, &cp->vaddr) && | |
1845ed0b | 379 | p->vport == cp->vport && p->cport == cp->cport && |
87375ab4 | 380 | cp->flags & IP_VS_CONN_F_TEMPLATE && |
1845ed0b | 381 | p->protocol == cp->protocol && |
e64e2b46 | 382 | cp->ipvs == p->ipvs) { |
088339a5 JA |
383 | if (__ip_vs_conn_get(cp)) |
384 | goto out; | |
385 | } | |
87375ab4 JA |
386 | } |
387 | cp = NULL; | |
388 | ||
389 | out: | |
088339a5 | 390 | rcu_read_unlock(); |
87375ab4 | 391 | |
28364a59 | 392 | IP_VS_DBG_BUF(9, "template lookup/in %s %s:%d->%s:%d %s\n", |
f11017ec SH |
393 | ip_vs_proto_name(p->protocol), |
394 | IP_VS_DBG_ADDR(p->af, p->caddr), ntohs(p->cport), | |
395 | IP_VS_DBG_ADDR(p->af, p->vaddr), ntohs(p->vport), | |
28364a59 | 396 | cp ? "hit" : "not hit"); |
87375ab4 JA |
397 | |
398 | return cp; | |
399 | } | |
1da177e4 | 400 | |
f11017ec SH |
401 | /* Gets ip_vs_conn associated with supplied parameters in the ip_vs_conn_tab. |
402 | * Called for pkts coming from inside-to-OUTside. | |
403 | * p->caddr, p->cport: pkt source address (inside host) | |
404 | * p->vaddr, p->vport: pkt dest address (foreign host) */ | |
405 | struct ip_vs_conn *ip_vs_conn_out_get(const struct ip_vs_conn_param *p) | |
1da177e4 | 406 | { |
95c96174 | 407 | unsigned int hash; |
1da177e4 LT |
408 | struct ip_vs_conn *cp, *ret=NULL; |
409 | ||
410 | /* | |
411 | * Check for "full" addressed entries | |
412 | */ | |
85999283 | 413 | hash = ip_vs_conn_hashkey_param(p, true); |
1da177e4 | 414 | |
088339a5 | 415 | rcu_read_lock(); |
1da177e4 | 416 | |
088339a5 | 417 | hlist_for_each_entry_rcu(cp, &ip_vs_conn_tab[hash], c_list) { |
1845ed0b JA |
418 | if (p->vport == cp->cport && p->cport == cp->dport && |
419 | cp->af == p->af && | |
f11017ec SH |
420 | ip_vs_addr_equal(p->af, p->vaddr, &cp->caddr) && |
421 | ip_vs_addr_equal(p->af, p->caddr, &cp->daddr) && | |
6e67e586 | 422 | p->protocol == cp->protocol && |
e64e2b46 | 423 | cp->ipvs == p->ipvs) { |
088339a5 JA |
424 | if (!__ip_vs_conn_get(cp)) |
425 | continue; | |
1da177e4 | 426 | /* HIT */ |
1da177e4 LT |
427 | ret = cp; |
428 | break; | |
429 | } | |
430 | } | |
431 | ||
088339a5 | 432 | rcu_read_unlock(); |
1da177e4 | 433 | |
28364a59 | 434 | IP_VS_DBG_BUF(9, "lookup/out %s %s:%d->%s:%d %s\n", |
f11017ec SH |
435 | ip_vs_proto_name(p->protocol), |
436 | IP_VS_DBG_ADDR(p->af, p->caddr), ntohs(p->cport), | |
437 | IP_VS_DBG_ADDR(p->af, p->vaddr), ntohs(p->vport), | |
28364a59 | 438 | ret ? "hit" : "not hit"); |
1da177e4 LT |
439 | |
440 | return ret; | |
441 | } | |
442 | ||
5c0d2374 | 443 | struct ip_vs_conn * |
0cf705c8 EB |
444 | ip_vs_conn_out_get_proto(struct netns_ipvs *ipvs, int af, |
445 | const struct sk_buff *skb, | |
802c41ad | 446 | const struct ip_vs_iphdr *iph) |
5c0d2374 | 447 | { |
f11017ec | 448 | struct ip_vs_conn_param p; |
5c0d2374 | 449 | |
f5099dd4 | 450 | if (ip_vs_conn_fill_param_proto(ipvs, af, skb, iph, &p)) |
5c0d2374 SH |
451 | return NULL; |
452 | ||
f11017ec | 453 | return ip_vs_conn_out_get(&p); |
5c0d2374 SH |
454 | } |
455 | EXPORT_SYMBOL_GPL(ip_vs_conn_out_get_proto); | |
1da177e4 | 456 | |
013b0424 MA |
457 | static void __ip_vs_conn_put_notimer(struct ip_vs_conn *cp) |
458 | { | |
459 | __ip_vs_conn_put(cp); | |
460 | ip_vs_conn_expire((unsigned long)cp); | |
461 | } | |
462 | ||
1da177e4 LT |
463 | /* |
464 | * Put back the conn and restart its timer with its timeout | |
465 | */ | |
013b0424 | 466 | static void __ip_vs_conn_put_timer(struct ip_vs_conn *cp) |
1da177e4 | 467 | { |
26ec037f NC |
468 | unsigned long t = (cp->flags & IP_VS_CONN_F_ONE_PACKET) ? |
469 | 0 : cp->timeout; | |
470 | mod_timer(&cp->timer, jiffies+t); | |
1da177e4 LT |
471 | |
472 | __ip_vs_conn_put(cp); | |
473 | } | |
474 | ||
013b0424 MA |
475 | void ip_vs_conn_put(struct ip_vs_conn *cp) |
476 | { | |
477 | if ((cp->flags & IP_VS_CONN_F_ONE_PACKET) && | |
478 | (atomic_read(&cp->refcnt) == 1) && | |
479 | !timer_pending(&cp->timer)) | |
480 | /* expire connection immediately */ | |
481 | __ip_vs_conn_put_notimer(cp); | |
482 | else | |
483 | __ip_vs_conn_put_timer(cp); | |
484 | } | |
1da177e4 LT |
485 | |
486 | /* | |
487 | * Fill a no_client_port connection with a client port number | |
488 | */ | |
014d730d | 489 | void ip_vs_conn_fill_cport(struct ip_vs_conn *cp, __be16 cport) |
1da177e4 LT |
490 | { |
491 | if (ip_vs_conn_unhash(cp)) { | |
ac69269a | 492 | spin_lock_bh(&cp->lock); |
1da177e4 LT |
493 | if (cp->flags & IP_VS_CONN_F_NO_CPORT) { |
494 | atomic_dec(&ip_vs_conn_no_cport_cnt); | |
495 | cp->flags &= ~IP_VS_CONN_F_NO_CPORT; | |
496 | cp->cport = cport; | |
497 | } | |
ac69269a | 498 | spin_unlock_bh(&cp->lock); |
1da177e4 LT |
499 | |
500 | /* hash on new dport */ | |
501 | ip_vs_conn_hash(cp); | |
502 | } | |
503 | } | |
504 | ||
505 | ||
506 | /* | |
507 | * Bind a connection entry with the corresponding packet_xmit. | |
508 | * Called by ip_vs_conn_new. | |
509 | */ | |
510 | static inline void ip_vs_bind_xmit(struct ip_vs_conn *cp) | |
511 | { | |
512 | switch (IP_VS_FWD_METHOD(cp)) { | |
513 | case IP_VS_CONN_F_MASQ: | |
514 | cp->packet_xmit = ip_vs_nat_xmit; | |
515 | break; | |
516 | ||
517 | case IP_VS_CONN_F_TUNNEL: | |
8052ba29 AG |
518 | #ifdef CONFIG_IP_VS_IPV6 |
519 | if (cp->daf == AF_INET6) | |
520 | cp->packet_xmit = ip_vs_tunnel_xmit_v6; | |
521 | else | |
522 | #endif | |
523 | cp->packet_xmit = ip_vs_tunnel_xmit; | |
1da177e4 LT |
524 | break; |
525 | ||
526 | case IP_VS_CONN_F_DROUTE: | |
527 | cp->packet_xmit = ip_vs_dr_xmit; | |
528 | break; | |
529 | ||
530 | case IP_VS_CONN_F_LOCALNODE: | |
531 | cp->packet_xmit = ip_vs_null_xmit; | |
532 | break; | |
533 | ||
534 | case IP_VS_CONN_F_BYPASS: | |
535 | cp->packet_xmit = ip_vs_bypass_xmit; | |
536 | break; | |
537 | } | |
538 | } | |
539 | ||
b3cdd2a7 JV |
540 | #ifdef CONFIG_IP_VS_IPV6 |
541 | static inline void ip_vs_bind_xmit_v6(struct ip_vs_conn *cp) | |
542 | { | |
543 | switch (IP_VS_FWD_METHOD(cp)) { | |
544 | case IP_VS_CONN_F_MASQ: | |
545 | cp->packet_xmit = ip_vs_nat_xmit_v6; | |
546 | break; | |
547 | ||
548 | case IP_VS_CONN_F_TUNNEL: | |
8052ba29 AG |
549 | if (cp->daf == AF_INET6) |
550 | cp->packet_xmit = ip_vs_tunnel_xmit_v6; | |
551 | else | |
552 | cp->packet_xmit = ip_vs_tunnel_xmit; | |
b3cdd2a7 JV |
553 | break; |
554 | ||
555 | case IP_VS_CONN_F_DROUTE: | |
556 | cp->packet_xmit = ip_vs_dr_xmit_v6; | |
557 | break; | |
558 | ||
559 | case IP_VS_CONN_F_LOCALNODE: | |
560 | cp->packet_xmit = ip_vs_null_xmit; | |
561 | break; | |
562 | ||
563 | case IP_VS_CONN_F_BYPASS: | |
564 | cp->packet_xmit = ip_vs_bypass_xmit_v6; | |
565 | break; | |
566 | } | |
567 | } | |
568 | #endif | |
569 | ||
1da177e4 LT |
570 | |
571 | static inline int ip_vs_dest_totalconns(struct ip_vs_dest *dest) | |
572 | { | |
573 | return atomic_read(&dest->activeconns) | |
574 | + atomic_read(&dest->inactconns); | |
575 | } | |
576 | ||
577 | /* | |
578 | * Bind a connection entry with a virtual service destination | |
579 | * Called just after a new connection entry is created. | |
580 | */ | |
581 | static inline void | |
582 | ip_vs_bind_dest(struct ip_vs_conn *cp, struct ip_vs_dest *dest) | |
583 | { | |
3575792e | 584 | unsigned int conn_flags; |
6b324dbf | 585 | __u32 flags; |
3575792e | 586 | |
1da177e4 LT |
587 | /* if dest is NULL, then return directly */ |
588 | if (!dest) | |
589 | return; | |
590 | ||
591 | /* Increase the refcnt counter of the dest */ | |
fca9c20a | 592 | ip_vs_dest_hold(dest); |
1da177e4 | 593 | |
3575792e JA |
594 | conn_flags = atomic_read(&dest->conn_flags); |
595 | if (cp->protocol != IPPROTO_UDP) | |
596 | conn_flags &= ~IP_VS_CONN_F_ONE_PACKET; | |
6b324dbf | 597 | flags = cp->flags; |
1da177e4 | 598 | /* Bind with the destination and its corresponding transmitter */ |
6b324dbf | 599 | if (flags & IP_VS_CONN_F_SYNC) { |
b209639e RB |
600 | /* if the connection is not template and is created |
601 | * by sync, preserve the activity flag. | |
602 | */ | |
6b324dbf | 603 | if (!(flags & IP_VS_CONN_F_TEMPLATE)) |
3575792e | 604 | conn_flags &= ~IP_VS_CONN_F_INACTIVE; |
3233759b | 605 | /* connections inherit forwarding method from dest */ |
6b324dbf | 606 | flags &= ~(IP_VS_CONN_F_FWD_MASK | IP_VS_CONN_F_NOOUTPUT); |
3575792e | 607 | } |
6b324dbf PNA |
608 | flags |= conn_flags; |
609 | cp->flags = flags; | |
1da177e4 LT |
610 | cp->dest = dest; |
611 | ||
cfc78c5a JV |
612 | IP_VS_DBG_BUF(7, "Bind-dest %s c:%s:%d v:%s:%d " |
613 | "d:%s:%d fwd:%c s:%u conn->flags:%X conn->refcnt:%d " | |
614 | "dest->refcnt:%d\n", | |
615 | ip_vs_proto_name(cp->protocol), | |
616 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), ntohs(cp->cport), | |
617 | IP_VS_DBG_ADDR(cp->af, &cp->vaddr), ntohs(cp->vport), | |
f18ae720 | 618 | IP_VS_DBG_ADDR(cp->daf, &cp->daddr), ntohs(cp->dport), |
cfc78c5a JV |
619 | ip_vs_fwd_tag(cp), cp->state, |
620 | cp->flags, atomic_read(&cp->refcnt), | |
621 | atomic_read(&dest->refcnt)); | |
1da177e4 LT |
622 | |
623 | /* Update the connection counters */ | |
6b324dbf | 624 | if (!(flags & IP_VS_CONN_F_TEMPLATE)) { |
06611f82 JA |
625 | /* It is a normal connection, so modify the counters |
626 | * according to the flags, later the protocol can | |
627 | * update them on state change | |
628 | */ | |
6b324dbf | 629 | if (!(flags & IP_VS_CONN_F_INACTIVE)) |
b209639e RB |
630 | atomic_inc(&dest->activeconns); |
631 | else | |
632 | atomic_inc(&dest->inactconns); | |
1da177e4 LT |
633 | } else { |
634 | /* It is a persistent connection/template, so increase | |
25985edc | 635 | the persistent connection counter */ |
1da177e4 LT |
636 | atomic_inc(&dest->persistconns); |
637 | } | |
638 | ||
639 | if (dest->u_threshold != 0 && | |
640 | ip_vs_dest_totalconns(dest) >= dest->u_threshold) | |
641 | dest->flags |= IP_VS_DEST_F_OVERLOAD; | |
642 | } | |
643 | ||
644 | ||
1e356f9c RB |
645 | /* |
646 | * Check if there is a destination for the connection, if so | |
647 | * bind the connection to the destination. | |
648 | */ | |
413c2d04 | 649 | void ip_vs_try_bind_dest(struct ip_vs_conn *cp) |
1e356f9c RB |
650 | { |
651 | struct ip_vs_dest *dest; | |
652 | ||
413c2d04 | 653 | rcu_read_lock(); |
655eef10 AG |
654 | |
655 | /* This function is only invoked by the synchronization code. We do | |
656 | * not currently support heterogeneous pools with synchronization, | |
657 | * so we can make the assumption that the svc_af is the same as the | |
658 | * dest_af | |
659 | */ | |
dc2add6f | 660 | dest = ip_vs_find_dest(cp->ipvs, cp->af, cp->af, &cp->daddr, |
882a844b JA |
661 | cp->dport, &cp->vaddr, cp->vport, |
662 | cp->protocol, cp->fwmark, cp->flags); | |
663 | if (dest) { | |
664 | struct ip_vs_proto_data *pd; | |
665 | ||
ac69269a | 666 | spin_lock_bh(&cp->lock); |
f73181c8 | 667 | if (cp->dest) { |
ac69269a | 668 | spin_unlock_bh(&cp->lock); |
413c2d04 JA |
669 | rcu_read_unlock(); |
670 | return; | |
f73181c8 PNA |
671 | } |
672 | ||
882a844b JA |
673 | /* Applications work depending on the forwarding method |
674 | * but better to reassign them always when binding dest */ | |
675 | if (cp->app) | |
676 | ip_vs_unbind_app(cp); | |
677 | ||
1e356f9c | 678 | ip_vs_bind_dest(cp, dest); |
ac69269a | 679 | spin_unlock_bh(&cp->lock); |
882a844b JA |
680 | |
681 | /* Update its packet transmitter */ | |
682 | cp->packet_xmit = NULL; | |
683 | #ifdef CONFIG_IP_VS_IPV6 | |
684 | if (cp->af == AF_INET6) | |
685 | ip_vs_bind_xmit_v6(cp); | |
686 | else | |
687 | #endif | |
688 | ip_vs_bind_xmit(cp); | |
689 | ||
18d6ade6 | 690 | pd = ip_vs_proto_data_get(cp->ipvs, cp->protocol); |
882a844b JA |
691 | if (pd && atomic_read(&pd->appcnt)) |
692 | ip_vs_bind_app(cp, pd->pp); | |
693 | } | |
413c2d04 | 694 | rcu_read_unlock(); |
1e356f9c | 695 | } |
1e356f9c RB |
696 | |
697 | ||
1da177e4 LT |
698 | /* |
699 | * Unbind a connection entry with its VS destination | |
700 | * Called by the ip_vs_conn_expire function. | |
701 | */ | |
702 | static inline void ip_vs_unbind_dest(struct ip_vs_conn *cp) | |
703 | { | |
704 | struct ip_vs_dest *dest = cp->dest; | |
705 | ||
706 | if (!dest) | |
707 | return; | |
708 | ||
cfc78c5a JV |
709 | IP_VS_DBG_BUF(7, "Unbind-dest %s c:%s:%d v:%s:%d " |
710 | "d:%s:%d fwd:%c s:%u conn->flags:%X conn->refcnt:%d " | |
711 | "dest->refcnt:%d\n", | |
712 | ip_vs_proto_name(cp->protocol), | |
713 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), ntohs(cp->cport), | |
714 | IP_VS_DBG_ADDR(cp->af, &cp->vaddr), ntohs(cp->vport), | |
f18ae720 | 715 | IP_VS_DBG_ADDR(cp->daf, &cp->daddr), ntohs(cp->dport), |
cfc78c5a JV |
716 | ip_vs_fwd_tag(cp), cp->state, |
717 | cp->flags, atomic_read(&cp->refcnt), | |
718 | atomic_read(&dest->refcnt)); | |
1da177e4 LT |
719 | |
720 | /* Update the connection counters */ | |
87375ab4 | 721 | if (!(cp->flags & IP_VS_CONN_F_TEMPLATE)) { |
1da177e4 LT |
722 | /* It is a normal connection, so decrease the inactconns |
723 | or activeconns counter */ | |
724 | if (cp->flags & IP_VS_CONN_F_INACTIVE) { | |
725 | atomic_dec(&dest->inactconns); | |
726 | } else { | |
727 | atomic_dec(&dest->activeconns); | |
728 | } | |
729 | } else { | |
730 | /* It is a persistent connection/template, so decrease | |
25985edc | 731 | the persistent connection counter */ |
1da177e4 LT |
732 | atomic_dec(&dest->persistconns); |
733 | } | |
734 | ||
735 | if (dest->l_threshold != 0) { | |
736 | if (ip_vs_dest_totalconns(dest) < dest->l_threshold) | |
737 | dest->flags &= ~IP_VS_DEST_F_OVERLOAD; | |
738 | } else if (dest->u_threshold != 0) { | |
739 | if (ip_vs_dest_totalconns(dest) * 4 < dest->u_threshold * 3) | |
740 | dest->flags &= ~IP_VS_DEST_F_OVERLOAD; | |
741 | } else { | |
742 | if (dest->flags & IP_VS_DEST_F_OVERLOAD) | |
743 | dest->flags &= ~IP_VS_DEST_F_OVERLOAD; | |
744 | } | |
745 | ||
fca9c20a | 746 | ip_vs_dest_put(dest); |
1da177e4 LT |
747 | } |
748 | ||
8e1b0b1b SH |
749 | static int expire_quiescent_template(struct netns_ipvs *ipvs, |
750 | struct ip_vs_dest *dest) | |
751 | { | |
752 | #ifdef CONFIG_SYSCTL | |
753 | return ipvs->sysctl_expire_quiescent_template && | |
754 | (atomic_read(&dest->weight) == 0); | |
755 | #else | |
756 | return 0; | |
757 | #endif | |
758 | } | |
1da177e4 LT |
759 | |
760 | /* | |
761 | * Checking if the destination of a connection template is available. | |
762 | * If available, return 1, otherwise invalidate this connection | |
763 | * template and return 0. | |
764 | */ | |
3ec10d3a | 765 | int ip_vs_check_template(struct ip_vs_conn *ct, struct ip_vs_dest *cdest) |
1da177e4 LT |
766 | { |
767 | struct ip_vs_dest *dest = ct->dest; | |
58dbc6f2 | 768 | struct netns_ipvs *ipvs = ct->ipvs; |
1da177e4 LT |
769 | |
770 | /* | |
771 | * Checking the dest server status. | |
772 | */ | |
773 | if ((dest == NULL) || | |
e905a9ed | 774 | !(dest->flags & IP_VS_DEST_F_AVAILABLE) || |
3ec10d3a MA |
775 | expire_quiescent_template(ipvs, dest) || |
776 | (cdest && (dest != cdest))) { | |
cfc78c5a JV |
777 | IP_VS_DBG_BUF(9, "check_template: dest not available for " |
778 | "protocol %s s:%s:%d v:%s:%d " | |
779 | "-> d:%s:%d\n", | |
780 | ip_vs_proto_name(ct->protocol), | |
781 | IP_VS_DBG_ADDR(ct->af, &ct->caddr), | |
782 | ntohs(ct->cport), | |
783 | IP_VS_DBG_ADDR(ct->af, &ct->vaddr), | |
784 | ntohs(ct->vport), | |
f18ae720 | 785 | IP_VS_DBG_ADDR(ct->daf, &ct->daddr), |
cfc78c5a | 786 | ntohs(ct->dport)); |
1da177e4 LT |
787 | |
788 | /* | |
789 | * Invalidate the connection template | |
790 | */ | |
014d730d | 791 | if (ct->vport != htons(0xffff)) { |
1da177e4 | 792 | if (ip_vs_conn_unhash(ct)) { |
014d730d AV |
793 | ct->dport = htons(0xffff); |
794 | ct->vport = htons(0xffff); | |
1da177e4 LT |
795 | ct->cport = 0; |
796 | ip_vs_conn_hash(ct); | |
797 | } | |
798 | } | |
799 | ||
800 | /* | |
801 | * Simply decrease the refcnt of the template, | |
802 | * don't restart its timer. | |
803 | */ | |
088339a5 | 804 | __ip_vs_conn_put(ct); |
1da177e4 LT |
805 | return 0; |
806 | } | |
807 | return 1; | |
808 | } | |
809 | ||
088339a5 JA |
810 | static void ip_vs_conn_rcu_free(struct rcu_head *head) |
811 | { | |
812 | struct ip_vs_conn *cp = container_of(head, struct ip_vs_conn, | |
813 | rcu_head); | |
814 | ||
815 | ip_vs_pe_put(cp->pe); | |
816 | kfree(cp->pe_data); | |
817 | kmem_cache_free(ip_vs_conn_cachep, cp); | |
818 | } | |
819 | ||
1da177e4 LT |
820 | static void ip_vs_conn_expire(unsigned long data) |
821 | { | |
822 | struct ip_vs_conn *cp = (struct ip_vs_conn *)data; | |
58dbc6f2 | 823 | struct netns_ipvs *ipvs = cp->ipvs; |
1da177e4 | 824 | |
1da177e4 LT |
825 | /* |
826 | * do I control anybody? | |
827 | */ | |
828 | if (atomic_read(&cp->n_control)) | |
829 | goto expire_later; | |
830 | ||
088339a5 JA |
831 | /* Unlink conn if not referenced anymore */ |
832 | if (likely(ip_vs_conn_unlink(cp))) { | |
1da177e4 | 833 | /* delete the timer if it is activated by other users */ |
25cc4ae9 | 834 | del_timer(&cp->timer); |
1da177e4 LT |
835 | |
836 | /* does anybody control me? */ | |
837 | if (cp->control) | |
838 | ip_vs_control_del(cp); | |
839 | ||
8fb04d9f MA |
840 | if ((cp->flags & IP_VS_CONN_F_NFCT) && |
841 | !(cp->flags & IP_VS_CONN_F_ONE_PACKET)) { | |
8f4e0a18 HS |
842 | /* Do not access conntracks during subsys cleanup |
843 | * because nf_conntrack_find_get can not be used after | |
844 | * conntrack cleanup for the net. | |
845 | */ | |
846 | smp_rmb(); | |
847 | if (ipvs->enable) | |
848 | ip_vs_conn_drop_conntrack(cp); | |
849 | } | |
f4bc17cd | 850 | |
1da177e4 LT |
851 | if (unlikely(cp->app != NULL)) |
852 | ip_vs_unbind_app(cp); | |
853 | ip_vs_unbind_dest(cp); | |
854 | if (cp->flags & IP_VS_CONN_F_NO_CPORT) | |
855 | atomic_dec(&ip_vs_conn_no_cport_cnt); | |
013b0424 MA |
856 | if (cp->flags & IP_VS_CONN_F_ONE_PACKET) |
857 | ip_vs_conn_rcu_free(&cp->rcu_head); | |
858 | else | |
859 | call_rcu(&cp->rcu_head, ip_vs_conn_rcu_free); | |
6e67e586 | 860 | atomic_dec(&ipvs->conn_count); |
1da177e4 LT |
861 | return; |
862 | } | |
863 | ||
1da177e4 | 864 | expire_later: |
088339a5 JA |
865 | IP_VS_DBG(7, "delayed: conn->refcnt=%d conn->n_control=%d\n", |
866 | atomic_read(&cp->refcnt), | |
1da177e4 LT |
867 | atomic_read(&cp->n_control)); |
868 | ||
088339a5 JA |
869 | atomic_inc(&cp->refcnt); |
870 | cp->timeout = 60*HZ; | |
871 | ||
749c42b6 | 872 | if (ipvs->sync_state & IP_VS_STATE_MASTER) |
b61a8c1a | 873 | ip_vs_sync_conn(ipvs, cp, sysctl_sync_threshold(ipvs)); |
749c42b6 | 874 | |
013b0424 | 875 | __ip_vs_conn_put_timer(cp); |
1da177e4 LT |
876 | } |
877 | ||
088339a5 JA |
878 | /* Modify timer, so that it expires as soon as possible. |
879 | * Can be called without reference only if under RCU lock. | |
880 | */ | |
1da177e4 LT |
881 | void ip_vs_conn_expire_now(struct ip_vs_conn *cp) |
882 | { | |
088339a5 JA |
883 | /* Using mod_timer_pending will ensure the timer is not |
884 | * modified after the final del_timer in ip_vs_conn_expire. | |
885 | */ | |
886 | if (timer_pending(&cp->timer) && | |
887 | time_after(cp->timer.expires, jiffies)) | |
888 | mod_timer_pending(&cp->timer, jiffies); | |
1da177e4 LT |
889 | } |
890 | ||
891 | ||
892 | /* | |
893 | * Create a new connection entry and hash it into the ip_vs_conn_tab | |
894 | */ | |
895 | struct ip_vs_conn * | |
ba38528a | 896 | ip_vs_conn_new(const struct ip_vs_conn_param *p, int dest_af, |
95c96174 | 897 | const union nf_inet_addr *daddr, __be16 dport, unsigned int flags, |
0e051e68 | 898 | struct ip_vs_dest *dest, __u32 fwmark) |
1da177e4 LT |
899 | { |
900 | struct ip_vs_conn *cp; | |
e64e2b46 | 901 | struct netns_ipvs *ipvs = p->ipvs; |
18d6ade6 | 902 | struct ip_vs_proto_data *pd = ip_vs_proto_data_get(p->ipvs, |
6e67e586 | 903 | p->protocol); |
1da177e4 | 904 | |
9a05475c | 905 | cp = kmem_cache_alloc(ip_vs_conn_cachep, GFP_ATOMIC); |
1da177e4 | 906 | if (cp == NULL) { |
1e3e238e | 907 | IP_VS_ERR_RL("%s(): no memory\n", __func__); |
1da177e4 LT |
908 | return NULL; |
909 | } | |
910 | ||
731109e7 | 911 | INIT_HLIST_NODE(&cp->c_list); |
b24b8a24 | 912 | setup_timer(&cp->timer, ip_vs_conn_expire, (unsigned long)cp); |
58dbc6f2 | 913 | cp->ipvs = ipvs; |
f11017ec | 914 | cp->af = p->af; |
ba38528a | 915 | cp->daf = dest_af; |
f11017ec | 916 | cp->protocol = p->protocol; |
9a05475c | 917 | ip_vs_addr_set(p->af, &cp->caddr, p->caddr); |
f11017ec | 918 | cp->cport = p->cport; |
2a971354 | 919 | /* proto should only be IPPROTO_IP if p->vaddr is a fwmark */ |
9a05475c | 920 | ip_vs_addr_set(p->protocol == IPPROTO_IP ? AF_UNSPEC : p->af, |
2a971354 MK |
921 | &cp->vaddr, p->vaddr); |
922 | cp->vport = p->vport; | |
ba38528a | 923 | ip_vs_addr_set(cp->daf, &cp->daddr, daddr); |
1da177e4 LT |
924 | cp->dport = dport; |
925 | cp->flags = flags; | |
0e051e68 | 926 | cp->fwmark = fwmark; |
e9e5eee8 SH |
927 | if (flags & IP_VS_CONN_F_TEMPLATE && p->pe) { |
928 | ip_vs_pe_get(p->pe); | |
929 | cp->pe = p->pe; | |
85999283 SH |
930 | cp->pe_data = p->pe_data; |
931 | cp->pe_data_len = p->pe_data_len; | |
9a05475c JA |
932 | } else { |
933 | cp->pe = NULL; | |
934 | cp->pe_data = NULL; | |
935 | cp->pe_data_len = 0; | |
85999283 | 936 | } |
1da177e4 LT |
937 | spin_lock_init(&cp->lock); |
938 | ||
939 | /* | |
940 | * Set the entry is referenced by the current thread before hashing | |
941 | * it in the table, so that other thread run ip_vs_random_dropentry | |
942 | * but cannot drop this entry. | |
943 | */ | |
944 | atomic_set(&cp->refcnt, 1); | |
945 | ||
9a05475c | 946 | cp->control = NULL; |
1da177e4 LT |
947 | atomic_set(&cp->n_control, 0); |
948 | atomic_set(&cp->in_pkts, 0); | |
949 | ||
9a05475c JA |
950 | cp->packet_xmit = NULL; |
951 | cp->app = NULL; | |
952 | cp->app_data = NULL; | |
953 | /* reset struct ip_vs_seq */ | |
954 | cp->in_seq.delta = 0; | |
955 | cp->out_seq.delta = 0; | |
956 | ||
6e67e586 | 957 | atomic_inc(&ipvs->conn_count); |
1da177e4 LT |
958 | if (flags & IP_VS_CONN_F_NO_CPORT) |
959 | atomic_inc(&ip_vs_conn_no_cport_cnt); | |
960 | ||
961 | /* Bind the connection with a destination server */ | |
9a05475c | 962 | cp->dest = NULL; |
1da177e4 LT |
963 | ip_vs_bind_dest(cp, dest); |
964 | ||
965 | /* Set its state and timeout */ | |
966 | cp->state = 0; | |
9a05475c | 967 | cp->old_state = 0; |
1da177e4 | 968 | cp->timeout = 3*HZ; |
749c42b6 | 969 | cp->sync_endtime = jiffies & ~3UL; |
1da177e4 LT |
970 | |
971 | /* Bind its packet transmitter */ | |
b3cdd2a7 | 972 | #ifdef CONFIG_IP_VS_IPV6 |
f11017ec | 973 | if (p->af == AF_INET6) |
b3cdd2a7 JV |
974 | ip_vs_bind_xmit_v6(cp); |
975 | else | |
976 | #endif | |
977 | ip_vs_bind_xmit(cp); | |
1da177e4 | 978 | |
9bbac6a9 HS |
979 | if (unlikely(pd && atomic_read(&pd->appcnt))) |
980 | ip_vs_bind_app(cp, pd->pp); | |
1da177e4 | 981 | |
f4bc17cd JA |
982 | /* |
983 | * Allow conntrack to be preserved. By default, conntrack | |
984 | * is created and destroyed for every packet. | |
985 | * Sometimes keeping conntrack can be useful for | |
986 | * IP_VS_CONN_F_ONE_PACKET too. | |
987 | */ | |
988 | ||
a0840e2e | 989 | if (ip_vs_conntrack_enabled(ipvs)) |
f4bc17cd JA |
990 | cp->flags |= IP_VS_CONN_F_NFCT; |
991 | ||
1da177e4 LT |
992 | /* Hash it in the ip_vs_conn_tab finally */ |
993 | ip_vs_conn_hash(cp); | |
994 | ||
995 | return cp; | |
996 | } | |
997 | ||
1da177e4 LT |
998 | /* |
999 | * /proc/net/ip_vs_conn entries | |
1000 | */ | |
1001 | #ifdef CONFIG_PROC_FS | |
6e67e586 | 1002 | struct ip_vs_iter_state { |
731109e7 CG |
1003 | struct seq_net_private p; |
1004 | struct hlist_head *l; | |
6e67e586 | 1005 | }; |
1da177e4 LT |
1006 | |
1007 | static void *ip_vs_conn_array(struct seq_file *seq, loff_t pos) | |
1008 | { | |
1009 | int idx; | |
1010 | struct ip_vs_conn *cp; | |
6e67e586 | 1011 | struct ip_vs_iter_state *iter = seq->private; |
e905a9ed | 1012 | |
6f7edb48 | 1013 | for (idx = 0; idx < ip_vs_conn_tab_size; idx++) { |
088339a5 JA |
1014 | hlist_for_each_entry_rcu(cp, &ip_vs_conn_tab[idx], c_list) { |
1015 | /* __ip_vs_conn_get() is not needed by | |
1016 | * ip_vs_conn_seq_show and ip_vs_conn_sync_seq_show | |
1017 | */ | |
1da177e4 | 1018 | if (pos-- == 0) { |
6e67e586 | 1019 | iter->l = &ip_vs_conn_tab[idx]; |
731109e7 | 1020 | return cp; |
1da177e4 LT |
1021 | } |
1022 | } | |
a38e5e23 | 1023 | cond_resched_rcu(); |
1da177e4 LT |
1024 | } |
1025 | ||
1026 | return NULL; | |
1027 | } | |
1028 | ||
1029 | static void *ip_vs_conn_seq_start(struct seq_file *seq, loff_t *pos) | |
7cf2eb7b | 1030 | __acquires(RCU) |
1da177e4 | 1031 | { |
6e67e586 HS |
1032 | struct ip_vs_iter_state *iter = seq->private; |
1033 | ||
1034 | iter->l = NULL; | |
7cf2eb7b | 1035 | rcu_read_lock(); |
1da177e4 LT |
1036 | return *pos ? ip_vs_conn_array(seq, *pos - 1) :SEQ_START_TOKEN; |
1037 | } | |
1038 | ||
1039 | static void *ip_vs_conn_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1040 | { | |
1041 | struct ip_vs_conn *cp = v; | |
6e67e586 | 1042 | struct ip_vs_iter_state *iter = seq->private; |
088339a5 | 1043 | struct hlist_node *e; |
731109e7 | 1044 | struct hlist_head *l = iter->l; |
1da177e4 LT |
1045 | int idx; |
1046 | ||
1047 | ++*pos; | |
e905a9ed | 1048 | if (v == SEQ_START_TOKEN) |
1da177e4 LT |
1049 | return ip_vs_conn_array(seq, 0); |
1050 | ||
1051 | /* more on same hash chain? */ | |
088339a5 JA |
1052 | e = rcu_dereference(hlist_next_rcu(&cp->c_list)); |
1053 | if (e) | |
1054 | return hlist_entry(e, struct ip_vs_conn, c_list); | |
1da177e4 LT |
1055 | |
1056 | idx = l - ip_vs_conn_tab; | |
6f7edb48 | 1057 | while (++idx < ip_vs_conn_tab_size) { |
088339a5 | 1058 | hlist_for_each_entry_rcu(cp, &ip_vs_conn_tab[idx], c_list) { |
6e67e586 | 1059 | iter->l = &ip_vs_conn_tab[idx]; |
1da177e4 | 1060 | return cp; |
e905a9ed | 1061 | } |
a38e5e23 | 1062 | cond_resched_rcu(); |
1da177e4 | 1063 | } |
6e67e586 | 1064 | iter->l = NULL; |
1da177e4 LT |
1065 | return NULL; |
1066 | } | |
1067 | ||
1068 | static void ip_vs_conn_seq_stop(struct seq_file *seq, void *v) | |
7cf2eb7b | 1069 | __releases(RCU) |
1da177e4 | 1070 | { |
7cf2eb7b | 1071 | rcu_read_unlock(); |
1da177e4 LT |
1072 | } |
1073 | ||
1074 | static int ip_vs_conn_seq_show(struct seq_file *seq, void *v) | |
1075 | { | |
1076 | ||
1077 | if (v == SEQ_START_TOKEN) | |
1078 | seq_puts(seq, | |
a3c918ac | 1079 | "Pro FromIP FPrt ToIP TPrt DestIP DPrt State Expires PEName PEData\n"); |
1da177e4 LT |
1080 | else { |
1081 | const struct ip_vs_conn *cp = v; | |
6e67e586 | 1082 | struct net *net = seq_file_net(seq); |
a3c918ac SH |
1083 | char pe_data[IP_VS_PENAME_MAXLEN + IP_VS_PEDATA_MAXLEN + 3]; |
1084 | size_t len = 0; | |
f18ae720 | 1085 | char dbuf[IP_VS_ADDRSTRLEN]; |
a3c918ac | 1086 | |
58dbc6f2 | 1087 | if (!net_eq(cp->ipvs->net, net)) |
6e67e586 | 1088 | return 0; |
e9e5eee8 | 1089 | if (cp->pe_data) { |
a3c918ac | 1090 | pe_data[0] = ' '; |
e9e5eee8 SH |
1091 | len = strlen(cp->pe->name); |
1092 | memcpy(pe_data + 1, cp->pe->name, len); | |
a3c918ac SH |
1093 | pe_data[len + 1] = ' '; |
1094 | len += 2; | |
e9e5eee8 | 1095 | len += cp->pe->show_pe_data(cp, pe_data + len); |
a3c918ac SH |
1096 | } |
1097 | pe_data[len] = '\0'; | |
1da177e4 | 1098 | |
f18ae720 JA |
1099 | #ifdef CONFIG_IP_VS_IPV6 |
1100 | if (cp->daf == AF_INET6) | |
1101 | snprintf(dbuf, sizeof(dbuf), "%pI6", &cp->daddr.in6); | |
1102 | else | |
1103 | #endif | |
1104 | snprintf(dbuf, sizeof(dbuf), "%08X", | |
1105 | ntohl(cp->daddr.ip)); | |
1106 | ||
667a5f18 VB |
1107 | #ifdef CONFIG_IP_VS_IPV6 |
1108 | if (cp->af == AF_INET6) | |
a3c918ac | 1109 | seq_printf(seq, "%-3s %pI6 %04X %pI6 %04X " |
f18ae720 | 1110 | "%s %04X %-11s %7lu%s\n", |
667a5f18 | 1111 | ip_vs_proto_name(cp->protocol), |
38ff4fa4 HH |
1112 | &cp->caddr.in6, ntohs(cp->cport), |
1113 | &cp->vaddr.in6, ntohs(cp->vport), | |
f18ae720 | 1114 | dbuf, ntohs(cp->dport), |
667a5f18 | 1115 | ip_vs_state_name(cp->protocol, cp->state), |
a3c918ac | 1116 | (cp->timer.expires-jiffies)/HZ, pe_data); |
667a5f18 VB |
1117 | else |
1118 | #endif | |
1119 | seq_printf(seq, | |
1120 | "%-3s %08X %04X %08X %04X" | |
f18ae720 | 1121 | " %s %04X %-11s %7lu%s\n", |
1da177e4 | 1122 | ip_vs_proto_name(cp->protocol), |
e7ade46a JV |
1123 | ntohl(cp->caddr.ip), ntohs(cp->cport), |
1124 | ntohl(cp->vaddr.ip), ntohs(cp->vport), | |
f18ae720 | 1125 | dbuf, ntohs(cp->dport), |
1da177e4 | 1126 | ip_vs_state_name(cp->protocol, cp->state), |
a3c918ac | 1127 | (cp->timer.expires-jiffies)/HZ, pe_data); |
1da177e4 LT |
1128 | } |
1129 | return 0; | |
1130 | } | |
1131 | ||
56b3d975 | 1132 | static const struct seq_operations ip_vs_conn_seq_ops = { |
1da177e4 LT |
1133 | .start = ip_vs_conn_seq_start, |
1134 | .next = ip_vs_conn_seq_next, | |
1135 | .stop = ip_vs_conn_seq_stop, | |
1136 | .show = ip_vs_conn_seq_show, | |
1137 | }; | |
1138 | ||
1139 | static int ip_vs_conn_open(struct inode *inode, struct file *file) | |
1140 | { | |
6e67e586 HS |
1141 | return seq_open_net(inode, file, &ip_vs_conn_seq_ops, |
1142 | sizeof(struct ip_vs_iter_state)); | |
1da177e4 LT |
1143 | } |
1144 | ||
9a32144e | 1145 | static const struct file_operations ip_vs_conn_fops = { |
1da177e4 LT |
1146 | .owner = THIS_MODULE, |
1147 | .open = ip_vs_conn_open, | |
1148 | .read = seq_read, | |
1149 | .llseek = seq_lseek, | |
0f08190f | 1150 | .release = seq_release_net, |
1da177e4 | 1151 | }; |
7a4fbb1f | 1152 | |
95c96174 | 1153 | static const char *ip_vs_origin_name(unsigned int flags) |
7a4fbb1f RB |
1154 | { |
1155 | if (flags & IP_VS_CONN_F_SYNC) | |
1156 | return "SYNC"; | |
1157 | else | |
1158 | return "LOCAL"; | |
1159 | } | |
1160 | ||
1161 | static int ip_vs_conn_sync_seq_show(struct seq_file *seq, void *v) | |
1162 | { | |
f18ae720 | 1163 | char dbuf[IP_VS_ADDRSTRLEN]; |
7a4fbb1f RB |
1164 | |
1165 | if (v == SEQ_START_TOKEN) | |
1166 | seq_puts(seq, | |
1167 | "Pro FromIP FPrt ToIP TPrt DestIP DPrt State Origin Expires\n"); | |
1168 | else { | |
1169 | const struct ip_vs_conn *cp = v; | |
6e67e586 HS |
1170 | struct net *net = seq_file_net(seq); |
1171 | ||
58dbc6f2 | 1172 | if (!net_eq(cp->ipvs->net, net)) |
6e67e586 | 1173 | return 0; |
7a4fbb1f | 1174 | |
f18ae720 JA |
1175 | #ifdef CONFIG_IP_VS_IPV6 |
1176 | if (cp->daf == AF_INET6) | |
1177 | snprintf(dbuf, sizeof(dbuf), "%pI6", &cp->daddr.in6); | |
1178 | else | |
1179 | #endif | |
1180 | snprintf(dbuf, sizeof(dbuf), "%08X", | |
1181 | ntohl(cp->daddr.ip)); | |
1182 | ||
667a5f18 VB |
1183 | #ifdef CONFIG_IP_VS_IPV6 |
1184 | if (cp->af == AF_INET6) | |
f18ae720 JA |
1185 | seq_printf(seq, "%-3s %pI6 %04X %pI6 %04X " |
1186 | "%s %04X %-11s %-6s %7lu\n", | |
667a5f18 | 1187 | ip_vs_proto_name(cp->protocol), |
38ff4fa4 HH |
1188 | &cp->caddr.in6, ntohs(cp->cport), |
1189 | &cp->vaddr.in6, ntohs(cp->vport), | |
f18ae720 | 1190 | dbuf, ntohs(cp->dport), |
667a5f18 VB |
1191 | ip_vs_state_name(cp->protocol, cp->state), |
1192 | ip_vs_origin_name(cp->flags), | |
1193 | (cp->timer.expires-jiffies)/HZ); | |
1194 | else | |
1195 | #endif | |
1196 | seq_printf(seq, | |
1197 | "%-3s %08X %04X %08X %04X " | |
f18ae720 | 1198 | "%s %04X %-11s %-6s %7lu\n", |
7a4fbb1f | 1199 | ip_vs_proto_name(cp->protocol), |
e7ade46a JV |
1200 | ntohl(cp->caddr.ip), ntohs(cp->cport), |
1201 | ntohl(cp->vaddr.ip), ntohs(cp->vport), | |
f18ae720 | 1202 | dbuf, ntohs(cp->dport), |
7a4fbb1f RB |
1203 | ip_vs_state_name(cp->protocol, cp->state), |
1204 | ip_vs_origin_name(cp->flags), | |
1205 | (cp->timer.expires-jiffies)/HZ); | |
1206 | } | |
1207 | return 0; | |
1208 | } | |
1209 | ||
1210 | static const struct seq_operations ip_vs_conn_sync_seq_ops = { | |
1211 | .start = ip_vs_conn_seq_start, | |
1212 | .next = ip_vs_conn_seq_next, | |
1213 | .stop = ip_vs_conn_seq_stop, | |
1214 | .show = ip_vs_conn_sync_seq_show, | |
1215 | }; | |
1216 | ||
1217 | static int ip_vs_conn_sync_open(struct inode *inode, struct file *file) | |
1218 | { | |
6e67e586 HS |
1219 | return seq_open_net(inode, file, &ip_vs_conn_sync_seq_ops, |
1220 | sizeof(struct ip_vs_iter_state)); | |
7a4fbb1f RB |
1221 | } |
1222 | ||
1223 | static const struct file_operations ip_vs_conn_sync_fops = { | |
1224 | .owner = THIS_MODULE, | |
1225 | .open = ip_vs_conn_sync_open, | |
1226 | .read = seq_read, | |
1227 | .llseek = seq_lseek, | |
0f08190f | 1228 | .release = seq_release_net, |
7a4fbb1f RB |
1229 | }; |
1230 | ||
1da177e4 LT |
1231 | #endif |
1232 | ||
1233 | ||
1234 | /* | |
1235 | * Randomly drop connection entries before running out of memory | |
1236 | */ | |
1237 | static inline int todrop_entry(struct ip_vs_conn *cp) | |
1238 | { | |
1239 | /* | |
1240 | * The drop rate array needs tuning for real environments. | |
1241 | * Called from timer bh only => no locking | |
1242 | */ | |
9b5b5cff | 1243 | static const char todrop_rate[9] = {0, 1, 2, 3, 4, 5, 6, 7, 8}; |
1da177e4 LT |
1244 | static char todrop_counter[9] = {0}; |
1245 | int i; | |
1246 | ||
1247 | /* if the conn entry hasn't lasted for 60 seconds, don't drop it. | |
1248 | This will leave enough time for normal connection to get | |
1249 | through. */ | |
1250 | if (time_before(cp->timeout + jiffies, cp->timer.expires + 60*HZ)) | |
1251 | return 0; | |
1252 | ||
1253 | /* Don't drop the entry if its number of incoming packets is not | |
1254 | located in [0, 8] */ | |
1255 | i = atomic_read(&cp->in_pkts); | |
1256 | if (i > 8 || i < 0) return 0; | |
1257 | ||
1258 | if (!todrop_rate[i]) return 0; | |
1259 | if (--todrop_counter[i] > 0) return 0; | |
1260 | ||
1261 | todrop_counter[i] = todrop_rate[i]; | |
1262 | return 1; | |
1263 | } | |
1264 | ||
698e2a8d MA |
1265 | static inline bool ip_vs_conn_ops_mode(struct ip_vs_conn *cp) |
1266 | { | |
1267 | struct ip_vs_service *svc; | |
1268 | ||
1269 | if (!cp->dest) | |
1270 | return false; | |
1271 | svc = rcu_dereference(cp->dest->svc); | |
1272 | return svc && (svc->flags & IP_VS_SVC_F_ONEPACKET); | |
1273 | } | |
1274 | ||
af9debd4 | 1275 | /* Called from keventd and must protect itself from softirqs */ |
423b5595 | 1276 | void ip_vs_random_dropentry(struct netns_ipvs *ipvs) |
1da177e4 LT |
1277 | { |
1278 | int idx; | |
088339a5 | 1279 | struct ip_vs_conn *cp, *cp_c; |
1da177e4 | 1280 | |
a38e5e23 | 1281 | rcu_read_lock(); |
1da177e4 LT |
1282 | /* |
1283 | * Randomly scan 1/32 of the whole table every second | |
1284 | */ | |
6f7edb48 | 1285 | for (idx = 0; idx < (ip_vs_conn_tab_size>>5); idx++) { |
63862b5b | 1286 | unsigned int hash = prandom_u32() & ip_vs_conn_tab_mask; |
1da177e4 | 1287 | |
088339a5 | 1288 | hlist_for_each_entry_rcu(cp, &ip_vs_conn_tab[hash], c_list) { |
423b5595 | 1289 | if (cp->ipvs != ipvs) |
f6340ee0 | 1290 | continue; |
698e2a8d MA |
1291 | if (cp->flags & IP_VS_CONN_F_TEMPLATE) { |
1292 | if (atomic_read(&cp->n_control) || | |
1293 | !ip_vs_conn_ops_mode(cp)) | |
1294 | continue; | |
1295 | else | |
1296 | /* connection template of OPS */ | |
1297 | goto try_drop; | |
1298 | } | |
1da177e4 LT |
1299 | if (cp->protocol == IPPROTO_TCP) { |
1300 | switch(cp->state) { | |
1301 | case IP_VS_TCP_S_SYN_RECV: | |
1302 | case IP_VS_TCP_S_SYNACK: | |
1303 | break; | |
1304 | ||
1305 | case IP_VS_TCP_S_ESTABLISHED: | |
1306 | if (todrop_entry(cp)) | |
1307 | break; | |
1308 | continue; | |
1309 | ||
1310 | default: | |
1311 | continue; | |
1312 | } | |
acaac5d8 JA |
1313 | } else if (cp->protocol == IPPROTO_SCTP) { |
1314 | switch (cp->state) { | |
1315 | case IP_VS_SCTP_S_INIT1: | |
1316 | case IP_VS_SCTP_S_INIT: | |
1317 | break; | |
1318 | case IP_VS_SCTP_S_ESTABLISHED: | |
1319 | if (todrop_entry(cp)) | |
1320 | break; | |
1321 | continue; | |
1322 | default: | |
1323 | continue; | |
1324 | } | |
1da177e4 | 1325 | } else { |
698e2a8d | 1326 | try_drop: |
1da177e4 LT |
1327 | if (!todrop_entry(cp)) |
1328 | continue; | |
1329 | } | |
1330 | ||
1da177e4 LT |
1331 | IP_VS_DBG(4, "del connection\n"); |
1332 | ip_vs_conn_expire_now(cp); | |
088339a5 JA |
1333 | cp_c = cp->control; |
1334 | /* cp->control is valid only with reference to cp */ | |
1335 | if (cp_c && __ip_vs_conn_get(cp)) { | |
1da177e4 | 1336 | IP_VS_DBG(4, "del conn template\n"); |
088339a5 JA |
1337 | ip_vs_conn_expire_now(cp_c); |
1338 | __ip_vs_conn_put(cp); | |
1da177e4 | 1339 | } |
1da177e4 | 1340 | } |
a38e5e23 | 1341 | cond_resched_rcu(); |
1da177e4 | 1342 | } |
a38e5e23 | 1343 | rcu_read_unlock(); |
1da177e4 LT |
1344 | } |
1345 | ||
1346 | ||
1347 | /* | |
1348 | * Flush all the connection entries in the ip_vs_conn_tab | |
1349 | */ | |
d889717a | 1350 | static void ip_vs_conn_flush(struct netns_ipvs *ipvs) |
1da177e4 LT |
1351 | { |
1352 | int idx; | |
088339a5 | 1353 | struct ip_vs_conn *cp, *cp_c; |
1da177e4 | 1354 | |
a0840e2e | 1355 | flush_again: |
a38e5e23 | 1356 | rcu_read_lock(); |
6f7edb48 | 1357 | for (idx = 0; idx < ip_vs_conn_tab_size; idx++) { |
1da177e4 | 1358 | |
088339a5 | 1359 | hlist_for_each_entry_rcu(cp, &ip_vs_conn_tab[idx], c_list) { |
58dbc6f2 | 1360 | if (cp->ipvs != ipvs) |
6e67e586 | 1361 | continue; |
1da177e4 LT |
1362 | IP_VS_DBG(4, "del connection\n"); |
1363 | ip_vs_conn_expire_now(cp); | |
088339a5 JA |
1364 | cp_c = cp->control; |
1365 | /* cp->control is valid only with reference to cp */ | |
1366 | if (cp_c && __ip_vs_conn_get(cp)) { | |
1da177e4 | 1367 | IP_VS_DBG(4, "del conn template\n"); |
088339a5 JA |
1368 | ip_vs_conn_expire_now(cp_c); |
1369 | __ip_vs_conn_put(cp); | |
1da177e4 | 1370 | } |
1da177e4 | 1371 | } |
a38e5e23 | 1372 | cond_resched_rcu(); |
1da177e4 | 1373 | } |
a38e5e23 | 1374 | rcu_read_unlock(); |
1da177e4 LT |
1375 | |
1376 | /* the counter may be not NULL, because maybe some conn entries | |
1377 | are run by slow timer handler or unhashed but still referred */ | |
6e67e586 | 1378 | if (atomic_read(&ipvs->conn_count) != 0) { |
1da177e4 LT |
1379 | schedule(); |
1380 | goto flush_again; | |
1381 | } | |
1382 | } | |
61b1ab45 HS |
1383 | /* |
1384 | * per netns init and exit | |
1385 | */ | |
2f3edc6a | 1386 | int __net_init ip_vs_conn_net_init(struct netns_ipvs *ipvs) |
61b1ab45 | 1387 | { |
6e67e586 | 1388 | atomic_set(&ipvs->conn_count, 0); |
1da177e4 | 1389 | |
92240e8d SH |
1390 | proc_create("ip_vs_conn", 0, ipvs->net->proc_net, &ip_vs_conn_fops); |
1391 | proc_create("ip_vs_conn_sync", 0, ipvs->net->proc_net, | |
1392 | &ip_vs_conn_sync_fops); | |
61b1ab45 HS |
1393 | return 0; |
1394 | } | |
1395 | ||
2f3edc6a | 1396 | void __net_exit ip_vs_conn_net_cleanup(struct netns_ipvs *ipvs) |
61b1ab45 | 1397 | { |
6e67e586 | 1398 | /* flush all the connection entries first */ |
d889717a | 1399 | ip_vs_conn_flush(ipvs); |
92240e8d SH |
1400 | remove_proc_entry("ip_vs_conn", ipvs->net->proc_net); |
1401 | remove_proc_entry("ip_vs_conn_sync", ipvs->net->proc_net); | |
61b1ab45 | 1402 | } |
1da177e4 | 1403 | |
048cf48b | 1404 | int __init ip_vs_conn_init(void) |
1da177e4 LT |
1405 | { |
1406 | int idx; | |
1407 | ||
6f7edb48 CB |
1408 | /* Compute size and mask */ |
1409 | ip_vs_conn_tab_size = 1 << ip_vs_conn_tab_bits; | |
1410 | ip_vs_conn_tab_mask = ip_vs_conn_tab_size - 1; | |
1411 | ||
1da177e4 LT |
1412 | /* |
1413 | * Allocate the connection hash table and initialize its list heads | |
1414 | */ | |
731109e7 | 1415 | ip_vs_conn_tab = vmalloc(ip_vs_conn_tab_size * sizeof(*ip_vs_conn_tab)); |
1da177e4 LT |
1416 | if (!ip_vs_conn_tab) |
1417 | return -ENOMEM; | |
1418 | ||
1419 | /* Allocate ip_vs_conn slab cache */ | |
1420 | ip_vs_conn_cachep = kmem_cache_create("ip_vs_conn", | |
1421 | sizeof(struct ip_vs_conn), 0, | |
20c2df83 | 1422 | SLAB_HWCACHE_ALIGN, NULL); |
1da177e4 LT |
1423 | if (!ip_vs_conn_cachep) { |
1424 | vfree(ip_vs_conn_tab); | |
1425 | return -ENOMEM; | |
1426 | } | |
1427 | ||
1e3e238e HE |
1428 | pr_info("Connection hash table configured " |
1429 | "(size=%d, memory=%ldKbytes)\n", | |
6f7edb48 CB |
1430 | ip_vs_conn_tab_size, |
1431 | (long)(ip_vs_conn_tab_size*sizeof(struct list_head))/1024); | |
1da177e4 LT |
1432 | IP_VS_DBG(0, "Each connection entry needs %Zd bytes at least\n", |
1433 | sizeof(struct ip_vs_conn)); | |
1434 | ||
731109e7 CG |
1435 | for (idx = 0; idx < ip_vs_conn_tab_size; idx++) |
1436 | INIT_HLIST_HEAD(&ip_vs_conn_tab[idx]); | |
1da177e4 LT |
1437 | |
1438 | for (idx = 0; idx < CT_LOCKARRAY_SIZE; idx++) { | |
088339a5 | 1439 | spin_lock_init(&__ip_vs_conntbl_lock_array[idx].l); |
1da177e4 LT |
1440 | } |
1441 | ||
1da177e4 LT |
1442 | /* calculate the random value for connection hash */ |
1443 | get_random_bytes(&ip_vs_conn_rnd, sizeof(ip_vs_conn_rnd)); | |
1444 | ||
7a4f0761 | 1445 | return 0; |
1da177e4 LT |
1446 | } |
1447 | ||
1da177e4 LT |
1448 | void ip_vs_conn_cleanup(void) |
1449 | { | |
088339a5 JA |
1450 | /* Wait all ip_vs_conn_rcu_free() callbacks to complete */ |
1451 | rcu_barrier(); | |
1da177e4 LT |
1452 | /* Release the empty cache */ |
1453 | kmem_cache_destroy(ip_vs_conn_cachep); | |
1da177e4 LT |
1454 | vfree(ip_vs_conn_tab); |
1455 | } |