Commit | Line | Data |
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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 | * Changes: | |
18 | * | |
19 | */ | |
20 | ||
21 | #include <linux/module.h> | |
22 | #include <linux/init.h> | |
23 | #include <linux/types.h> | |
4fc268d2 | 24 | #include <linux/capability.h> |
1da177e4 LT |
25 | #include <linux/fs.h> |
26 | #include <linux/sysctl.h> | |
27 | #include <linux/proc_fs.h> | |
28 | #include <linux/workqueue.h> | |
29 | #include <linux/swap.h> | |
1da177e4 LT |
30 | #include <linux/seq_file.h> |
31 | ||
32 | #include <linux/netfilter.h> | |
33 | #include <linux/netfilter_ipv4.h> | |
14cc3e2b | 34 | #include <linux/mutex.h> |
1da177e4 | 35 | |
457c4cbc | 36 | #include <net/net_namespace.h> |
1da177e4 | 37 | #include <net/ip.h> |
14c85021 | 38 | #include <net/route.h> |
1da177e4 LT |
39 | #include <net/sock.h> |
40 | ||
41 | #include <asm/uaccess.h> | |
42 | ||
43 | #include <net/ip_vs.h> | |
44 | ||
45 | /* semaphore for IPVS sockopts. And, [gs]etsockopt may sleep. */ | |
14cc3e2b | 46 | static DEFINE_MUTEX(__ip_vs_mutex); |
1da177e4 LT |
47 | |
48 | /* lock for service table */ | |
49 | static DEFINE_RWLOCK(__ip_vs_svc_lock); | |
50 | ||
51 | /* lock for table with the real services */ | |
52 | static DEFINE_RWLOCK(__ip_vs_rs_lock); | |
53 | ||
54 | /* lock for state and timeout tables */ | |
55 | static DEFINE_RWLOCK(__ip_vs_securetcp_lock); | |
56 | ||
57 | /* lock for drop entry handling */ | |
58 | static DEFINE_SPINLOCK(__ip_vs_dropentry_lock); | |
59 | ||
60 | /* lock for drop packet handling */ | |
61 | static DEFINE_SPINLOCK(__ip_vs_droppacket_lock); | |
62 | ||
63 | /* 1/rate drop and drop-entry variables */ | |
64 | int ip_vs_drop_rate = 0; | |
65 | int ip_vs_drop_counter = 0; | |
66 | static atomic_t ip_vs_dropentry = ATOMIC_INIT(0); | |
67 | ||
68 | /* number of virtual services */ | |
69 | static int ip_vs_num_services = 0; | |
70 | ||
71 | /* sysctl variables */ | |
72 | static int sysctl_ip_vs_drop_entry = 0; | |
73 | static int sysctl_ip_vs_drop_packet = 0; | |
74 | static int sysctl_ip_vs_secure_tcp = 0; | |
75 | static int sysctl_ip_vs_amemthresh = 1024; | |
76 | static int sysctl_ip_vs_am_droprate = 10; | |
77 | int sysctl_ip_vs_cache_bypass = 0; | |
78 | int sysctl_ip_vs_expire_nodest_conn = 0; | |
79 | int sysctl_ip_vs_expire_quiescent_template = 0; | |
80 | int sysctl_ip_vs_sync_threshold[2] = { 3, 50 }; | |
81 | int sysctl_ip_vs_nat_icmp_send = 0; | |
82 | ||
83 | ||
84 | #ifdef CONFIG_IP_VS_DEBUG | |
85 | static int sysctl_ip_vs_debug_level = 0; | |
86 | ||
87 | int ip_vs_get_debug_level(void) | |
88 | { | |
89 | return sysctl_ip_vs_debug_level; | |
90 | } | |
91 | #endif | |
92 | ||
93 | /* | |
af9debd4 JA |
94 | * update_defense_level is called from keventd and from sysctl, |
95 | * so it needs to protect itself from softirqs | |
1da177e4 LT |
96 | */ |
97 | static void update_defense_level(void) | |
98 | { | |
99 | struct sysinfo i; | |
100 | static int old_secure_tcp = 0; | |
101 | int availmem; | |
102 | int nomem; | |
103 | int to_change = -1; | |
104 | ||
105 | /* we only count free and buffered memory (in pages) */ | |
106 | si_meminfo(&i); | |
107 | availmem = i.freeram + i.bufferram; | |
108 | /* however in linux 2.5 the i.bufferram is total page cache size, | |
109 | we need adjust it */ | |
110 | /* si_swapinfo(&i); */ | |
111 | /* availmem = availmem - (i.totalswap - i.freeswap); */ | |
112 | ||
113 | nomem = (availmem < sysctl_ip_vs_amemthresh); | |
114 | ||
af9debd4 JA |
115 | local_bh_disable(); |
116 | ||
1da177e4 LT |
117 | /* drop_entry */ |
118 | spin_lock(&__ip_vs_dropentry_lock); | |
119 | switch (sysctl_ip_vs_drop_entry) { | |
120 | case 0: | |
121 | atomic_set(&ip_vs_dropentry, 0); | |
122 | break; | |
123 | case 1: | |
124 | if (nomem) { | |
125 | atomic_set(&ip_vs_dropentry, 1); | |
126 | sysctl_ip_vs_drop_entry = 2; | |
127 | } else { | |
128 | atomic_set(&ip_vs_dropentry, 0); | |
129 | } | |
130 | break; | |
131 | case 2: | |
132 | if (nomem) { | |
133 | atomic_set(&ip_vs_dropentry, 1); | |
134 | } else { | |
135 | atomic_set(&ip_vs_dropentry, 0); | |
136 | sysctl_ip_vs_drop_entry = 1; | |
137 | }; | |
138 | break; | |
139 | case 3: | |
140 | atomic_set(&ip_vs_dropentry, 1); | |
141 | break; | |
142 | } | |
143 | spin_unlock(&__ip_vs_dropentry_lock); | |
144 | ||
145 | /* drop_packet */ | |
146 | spin_lock(&__ip_vs_droppacket_lock); | |
147 | switch (sysctl_ip_vs_drop_packet) { | |
148 | case 0: | |
149 | ip_vs_drop_rate = 0; | |
150 | break; | |
151 | case 1: | |
152 | if (nomem) { | |
153 | ip_vs_drop_rate = ip_vs_drop_counter | |
154 | = sysctl_ip_vs_amemthresh / | |
155 | (sysctl_ip_vs_amemthresh-availmem); | |
156 | sysctl_ip_vs_drop_packet = 2; | |
157 | } else { | |
158 | ip_vs_drop_rate = 0; | |
159 | } | |
160 | break; | |
161 | case 2: | |
162 | if (nomem) { | |
163 | ip_vs_drop_rate = ip_vs_drop_counter | |
164 | = sysctl_ip_vs_amemthresh / | |
165 | (sysctl_ip_vs_amemthresh-availmem); | |
166 | } else { | |
167 | ip_vs_drop_rate = 0; | |
168 | sysctl_ip_vs_drop_packet = 1; | |
169 | } | |
170 | break; | |
171 | case 3: | |
172 | ip_vs_drop_rate = sysctl_ip_vs_am_droprate; | |
173 | break; | |
174 | } | |
175 | spin_unlock(&__ip_vs_droppacket_lock); | |
176 | ||
177 | /* secure_tcp */ | |
178 | write_lock(&__ip_vs_securetcp_lock); | |
179 | switch (sysctl_ip_vs_secure_tcp) { | |
180 | case 0: | |
181 | if (old_secure_tcp >= 2) | |
182 | to_change = 0; | |
183 | break; | |
184 | case 1: | |
185 | if (nomem) { | |
186 | if (old_secure_tcp < 2) | |
187 | to_change = 1; | |
188 | sysctl_ip_vs_secure_tcp = 2; | |
189 | } else { | |
190 | if (old_secure_tcp >= 2) | |
191 | to_change = 0; | |
192 | } | |
193 | break; | |
194 | case 2: | |
195 | if (nomem) { | |
196 | if (old_secure_tcp < 2) | |
197 | to_change = 1; | |
198 | } else { | |
199 | if (old_secure_tcp >= 2) | |
200 | to_change = 0; | |
201 | sysctl_ip_vs_secure_tcp = 1; | |
202 | } | |
203 | break; | |
204 | case 3: | |
205 | if (old_secure_tcp < 2) | |
206 | to_change = 1; | |
207 | break; | |
208 | } | |
209 | old_secure_tcp = sysctl_ip_vs_secure_tcp; | |
210 | if (to_change >= 0) | |
211 | ip_vs_protocol_timeout_change(sysctl_ip_vs_secure_tcp>1); | |
212 | write_unlock(&__ip_vs_securetcp_lock); | |
af9debd4 JA |
213 | |
214 | local_bh_enable(); | |
1da177e4 LT |
215 | } |
216 | ||
217 | ||
218 | /* | |
219 | * Timer for checking the defense | |
220 | */ | |
221 | #define DEFENSE_TIMER_PERIOD 1*HZ | |
c4028958 DH |
222 | static void defense_work_handler(struct work_struct *work); |
223 | static DECLARE_DELAYED_WORK(defense_work, defense_work_handler); | |
1da177e4 | 224 | |
c4028958 | 225 | static void defense_work_handler(struct work_struct *work) |
1da177e4 LT |
226 | { |
227 | update_defense_level(); | |
228 | if (atomic_read(&ip_vs_dropentry)) | |
229 | ip_vs_random_dropentry(); | |
230 | ||
231 | schedule_delayed_work(&defense_work, DEFENSE_TIMER_PERIOD); | |
232 | } | |
233 | ||
234 | int | |
235 | ip_vs_use_count_inc(void) | |
236 | { | |
237 | return try_module_get(THIS_MODULE); | |
238 | } | |
239 | ||
240 | void | |
241 | ip_vs_use_count_dec(void) | |
242 | { | |
243 | module_put(THIS_MODULE); | |
244 | } | |
245 | ||
246 | ||
247 | /* | |
248 | * Hash table: for virtual service lookups | |
249 | */ | |
250 | #define IP_VS_SVC_TAB_BITS 8 | |
251 | #define IP_VS_SVC_TAB_SIZE (1 << IP_VS_SVC_TAB_BITS) | |
252 | #define IP_VS_SVC_TAB_MASK (IP_VS_SVC_TAB_SIZE - 1) | |
253 | ||
254 | /* the service table hashed by <protocol, addr, port> */ | |
255 | static struct list_head ip_vs_svc_table[IP_VS_SVC_TAB_SIZE]; | |
256 | /* the service table hashed by fwmark */ | |
257 | static struct list_head ip_vs_svc_fwm_table[IP_VS_SVC_TAB_SIZE]; | |
258 | ||
259 | /* | |
260 | * Hash table: for real service lookups | |
261 | */ | |
262 | #define IP_VS_RTAB_BITS 4 | |
263 | #define IP_VS_RTAB_SIZE (1 << IP_VS_RTAB_BITS) | |
264 | #define IP_VS_RTAB_MASK (IP_VS_RTAB_SIZE - 1) | |
265 | ||
266 | static struct list_head ip_vs_rtable[IP_VS_RTAB_SIZE]; | |
267 | ||
268 | /* | |
269 | * Trash for destinations | |
270 | */ | |
271 | static LIST_HEAD(ip_vs_dest_trash); | |
272 | ||
273 | /* | |
274 | * FTP & NULL virtual service counters | |
275 | */ | |
276 | static atomic_t ip_vs_ftpsvc_counter = ATOMIC_INIT(0); | |
277 | static atomic_t ip_vs_nullsvc_counter = ATOMIC_INIT(0); | |
278 | ||
279 | ||
280 | /* | |
281 | * Returns hash value for virtual service | |
282 | */ | |
283 | static __inline__ unsigned | |
014d730d | 284 | ip_vs_svc_hashkey(unsigned proto, __be32 addr, __be16 port) |
1da177e4 LT |
285 | { |
286 | register unsigned porth = ntohs(port); | |
287 | ||
288 | return (proto^ntohl(addr)^(porth>>IP_VS_SVC_TAB_BITS)^porth) | |
289 | & IP_VS_SVC_TAB_MASK; | |
290 | } | |
291 | ||
292 | /* | |
293 | * Returns hash value of fwmark for virtual service lookup | |
294 | */ | |
295 | static __inline__ unsigned ip_vs_svc_fwm_hashkey(__u32 fwmark) | |
296 | { | |
297 | return fwmark & IP_VS_SVC_TAB_MASK; | |
298 | } | |
299 | ||
300 | /* | |
301 | * Hashes a service in the ip_vs_svc_table by <proto,addr,port> | |
302 | * or in the ip_vs_svc_fwm_table by fwmark. | |
303 | * Should be called with locked tables. | |
304 | */ | |
305 | static int ip_vs_svc_hash(struct ip_vs_service *svc) | |
306 | { | |
307 | unsigned hash; | |
308 | ||
309 | if (svc->flags & IP_VS_SVC_F_HASHED) { | |
310 | IP_VS_ERR("ip_vs_svc_hash(): request for already hashed, " | |
311 | "called from %p\n", __builtin_return_address(0)); | |
312 | return 0; | |
313 | } | |
314 | ||
315 | if (svc->fwmark == 0) { | |
316 | /* | |
317 | * Hash it by <protocol,addr,port> in ip_vs_svc_table | |
318 | */ | |
319 | hash = ip_vs_svc_hashkey(svc->protocol, svc->addr, svc->port); | |
320 | list_add(&svc->s_list, &ip_vs_svc_table[hash]); | |
321 | } else { | |
322 | /* | |
323 | * Hash it by fwmark in ip_vs_svc_fwm_table | |
324 | */ | |
325 | hash = ip_vs_svc_fwm_hashkey(svc->fwmark); | |
326 | list_add(&svc->f_list, &ip_vs_svc_fwm_table[hash]); | |
327 | } | |
328 | ||
329 | svc->flags |= IP_VS_SVC_F_HASHED; | |
330 | /* increase its refcnt because it is referenced by the svc table */ | |
331 | atomic_inc(&svc->refcnt); | |
332 | return 1; | |
333 | } | |
334 | ||
335 | ||
336 | /* | |
337 | * Unhashes a service from ip_vs_svc_table/ip_vs_svc_fwm_table. | |
338 | * Should be called with locked tables. | |
339 | */ | |
340 | static int ip_vs_svc_unhash(struct ip_vs_service *svc) | |
341 | { | |
342 | if (!(svc->flags & IP_VS_SVC_F_HASHED)) { | |
343 | IP_VS_ERR("ip_vs_svc_unhash(): request for unhash flagged, " | |
344 | "called from %p\n", __builtin_return_address(0)); | |
345 | return 0; | |
346 | } | |
347 | ||
348 | if (svc->fwmark == 0) { | |
349 | /* Remove it from the ip_vs_svc_table table */ | |
350 | list_del(&svc->s_list); | |
351 | } else { | |
352 | /* Remove it from the ip_vs_svc_fwm_table table */ | |
353 | list_del(&svc->f_list); | |
354 | } | |
355 | ||
356 | svc->flags &= ~IP_VS_SVC_F_HASHED; | |
357 | atomic_dec(&svc->refcnt); | |
358 | return 1; | |
359 | } | |
360 | ||
361 | ||
362 | /* | |
363 | * Get service by {proto,addr,port} in the service table. | |
364 | */ | |
365 | static __inline__ struct ip_vs_service * | |
014d730d | 366 | __ip_vs_service_get(__u16 protocol, __be32 vaddr, __be16 vport) |
1da177e4 LT |
367 | { |
368 | unsigned hash; | |
369 | struct ip_vs_service *svc; | |
370 | ||
371 | /* Check for "full" addressed entries */ | |
372 | hash = ip_vs_svc_hashkey(protocol, vaddr, vport); | |
373 | ||
374 | list_for_each_entry(svc, &ip_vs_svc_table[hash], s_list){ | |
375 | if ((svc->addr == vaddr) | |
376 | && (svc->port == vport) | |
377 | && (svc->protocol == protocol)) { | |
378 | /* HIT */ | |
379 | atomic_inc(&svc->usecnt); | |
380 | return svc; | |
381 | } | |
382 | } | |
383 | ||
384 | return NULL; | |
385 | } | |
386 | ||
387 | ||
388 | /* | |
389 | * Get service by {fwmark} in the service table. | |
390 | */ | |
391 | static __inline__ struct ip_vs_service *__ip_vs_svc_fwm_get(__u32 fwmark) | |
392 | { | |
393 | unsigned hash; | |
394 | struct ip_vs_service *svc; | |
395 | ||
396 | /* Check for fwmark addressed entries */ | |
397 | hash = ip_vs_svc_fwm_hashkey(fwmark); | |
398 | ||
399 | list_for_each_entry(svc, &ip_vs_svc_fwm_table[hash], f_list) { | |
400 | if (svc->fwmark == fwmark) { | |
401 | /* HIT */ | |
402 | atomic_inc(&svc->usecnt); | |
403 | return svc; | |
404 | } | |
405 | } | |
406 | ||
407 | return NULL; | |
408 | } | |
409 | ||
410 | struct ip_vs_service * | |
014d730d | 411 | ip_vs_service_get(__u32 fwmark, __u16 protocol, __be32 vaddr, __be16 vport) |
1da177e4 LT |
412 | { |
413 | struct ip_vs_service *svc; | |
414 | ||
415 | read_lock(&__ip_vs_svc_lock); | |
416 | ||
417 | /* | |
418 | * Check the table hashed by fwmark first | |
419 | */ | |
420 | if (fwmark && (svc = __ip_vs_svc_fwm_get(fwmark))) | |
421 | goto out; | |
422 | ||
423 | /* | |
424 | * Check the table hashed by <protocol,addr,port> | |
425 | * for "full" addressed entries | |
426 | */ | |
427 | svc = __ip_vs_service_get(protocol, vaddr, vport); | |
428 | ||
429 | if (svc == NULL | |
430 | && protocol == IPPROTO_TCP | |
431 | && atomic_read(&ip_vs_ftpsvc_counter) | |
432 | && (vport == FTPDATA || ntohs(vport) >= PROT_SOCK)) { | |
433 | /* | |
434 | * Check if ftp service entry exists, the packet | |
435 | * might belong to FTP data connections. | |
436 | */ | |
437 | svc = __ip_vs_service_get(protocol, vaddr, FTPPORT); | |
438 | } | |
439 | ||
440 | if (svc == NULL | |
441 | && atomic_read(&ip_vs_nullsvc_counter)) { | |
442 | /* | |
443 | * Check if the catch-all port (port zero) exists | |
444 | */ | |
445 | svc = __ip_vs_service_get(protocol, vaddr, 0); | |
446 | } | |
447 | ||
448 | out: | |
449 | read_unlock(&__ip_vs_svc_lock); | |
450 | ||
4b5bdf5c | 451 | IP_VS_DBG(9, "lookup service: fwm %u %s %u.%u.%u.%u:%u %s\n", |
1da177e4 LT |
452 | fwmark, ip_vs_proto_name(protocol), |
453 | NIPQUAD(vaddr), ntohs(vport), | |
454 | svc?"hit":"not hit"); | |
455 | ||
456 | return svc; | |
457 | } | |
458 | ||
459 | ||
460 | static inline void | |
461 | __ip_vs_bind_svc(struct ip_vs_dest *dest, struct ip_vs_service *svc) | |
462 | { | |
463 | atomic_inc(&svc->refcnt); | |
464 | dest->svc = svc; | |
465 | } | |
466 | ||
467 | static inline void | |
468 | __ip_vs_unbind_svc(struct ip_vs_dest *dest) | |
469 | { | |
470 | struct ip_vs_service *svc = dest->svc; | |
471 | ||
472 | dest->svc = NULL; | |
473 | if (atomic_dec_and_test(&svc->refcnt)) | |
474 | kfree(svc); | |
475 | } | |
476 | ||
477 | ||
478 | /* | |
479 | * Returns hash value for real service | |
480 | */ | |
014d730d | 481 | static __inline__ unsigned ip_vs_rs_hashkey(__be32 addr, __be16 port) |
1da177e4 LT |
482 | { |
483 | register unsigned porth = ntohs(port); | |
484 | ||
485 | return (ntohl(addr)^(porth>>IP_VS_RTAB_BITS)^porth) | |
486 | & IP_VS_RTAB_MASK; | |
487 | } | |
488 | ||
489 | /* | |
490 | * Hashes ip_vs_dest in ip_vs_rtable by <proto,addr,port>. | |
491 | * should be called with locked tables. | |
492 | */ | |
493 | static int ip_vs_rs_hash(struct ip_vs_dest *dest) | |
494 | { | |
495 | unsigned hash; | |
496 | ||
497 | if (!list_empty(&dest->d_list)) { | |
498 | return 0; | |
499 | } | |
500 | ||
501 | /* | |
502 | * Hash by proto,addr,port, | |
503 | * which are the parameters of the real service. | |
504 | */ | |
505 | hash = ip_vs_rs_hashkey(dest->addr, dest->port); | |
506 | list_add(&dest->d_list, &ip_vs_rtable[hash]); | |
507 | ||
508 | return 1; | |
509 | } | |
510 | ||
511 | /* | |
512 | * UNhashes ip_vs_dest from ip_vs_rtable. | |
513 | * should be called with locked tables. | |
514 | */ | |
515 | static int ip_vs_rs_unhash(struct ip_vs_dest *dest) | |
516 | { | |
517 | /* | |
518 | * Remove it from the ip_vs_rtable table. | |
519 | */ | |
520 | if (!list_empty(&dest->d_list)) { | |
521 | list_del(&dest->d_list); | |
522 | INIT_LIST_HEAD(&dest->d_list); | |
523 | } | |
524 | ||
525 | return 1; | |
526 | } | |
527 | ||
528 | /* | |
529 | * Lookup real service by <proto,addr,port> in the real service table. | |
530 | */ | |
531 | struct ip_vs_dest * | |
014d730d | 532 | ip_vs_lookup_real_service(__u16 protocol, __be32 daddr, __be16 dport) |
1da177e4 LT |
533 | { |
534 | unsigned hash; | |
535 | struct ip_vs_dest *dest; | |
536 | ||
537 | /* | |
538 | * Check for "full" addressed entries | |
539 | * Return the first found entry | |
540 | */ | |
541 | hash = ip_vs_rs_hashkey(daddr, dport); | |
542 | ||
543 | read_lock(&__ip_vs_rs_lock); | |
544 | list_for_each_entry(dest, &ip_vs_rtable[hash], d_list) { | |
545 | if ((dest->addr == daddr) | |
546 | && (dest->port == dport) | |
547 | && ((dest->protocol == protocol) || | |
548 | dest->vfwmark)) { | |
549 | /* HIT */ | |
550 | read_unlock(&__ip_vs_rs_lock); | |
551 | return dest; | |
552 | } | |
553 | } | |
554 | read_unlock(&__ip_vs_rs_lock); | |
555 | ||
556 | return NULL; | |
557 | } | |
558 | ||
559 | /* | |
560 | * Lookup destination by {addr,port} in the given service | |
561 | */ | |
562 | static struct ip_vs_dest * | |
014d730d | 563 | ip_vs_lookup_dest(struct ip_vs_service *svc, __be32 daddr, __be16 dport) |
1da177e4 LT |
564 | { |
565 | struct ip_vs_dest *dest; | |
566 | ||
567 | /* | |
568 | * Find the destination for the given service | |
569 | */ | |
570 | list_for_each_entry(dest, &svc->destinations, n_list) { | |
571 | if ((dest->addr == daddr) && (dest->port == dport)) { | |
572 | /* HIT */ | |
573 | return dest; | |
574 | } | |
575 | } | |
576 | ||
577 | return NULL; | |
578 | } | |
579 | ||
1e356f9c RB |
580 | /* |
581 | * Find destination by {daddr,dport,vaddr,protocol} | |
582 | * Cretaed to be used in ip_vs_process_message() in | |
583 | * the backup synchronization daemon. It finds the | |
584 | * destination to be bound to the received connection | |
585 | * on the backup. | |
586 | * | |
587 | * ip_vs_lookup_real_service() looked promissing, but | |
588 | * seems not working as expected. | |
589 | */ | |
590 | struct ip_vs_dest *ip_vs_find_dest(__be32 daddr, __be16 dport, | |
591 | __be32 vaddr, __be16 vport, __u16 protocol) | |
592 | { | |
593 | struct ip_vs_dest *dest; | |
594 | struct ip_vs_service *svc; | |
595 | ||
596 | svc = ip_vs_service_get(0, protocol, vaddr, vport); | |
597 | if (!svc) | |
598 | return NULL; | |
599 | dest = ip_vs_lookup_dest(svc, daddr, dport); | |
600 | if (dest) | |
601 | atomic_inc(&dest->refcnt); | |
602 | ip_vs_service_put(svc); | |
603 | return dest; | |
604 | } | |
1da177e4 LT |
605 | |
606 | /* | |
607 | * Lookup dest by {svc,addr,port} in the destination trash. | |
608 | * The destination trash is used to hold the destinations that are removed | |
609 | * from the service table but are still referenced by some conn entries. | |
610 | * The reason to add the destination trash is when the dest is temporary | |
611 | * down (either by administrator or by monitor program), the dest can be | |
612 | * picked back from the trash, the remaining connections to the dest can | |
613 | * continue, and the counting information of the dest is also useful for | |
614 | * scheduling. | |
615 | */ | |
616 | static struct ip_vs_dest * | |
014d730d | 617 | ip_vs_trash_get_dest(struct ip_vs_service *svc, __be32 daddr, __be16 dport) |
1da177e4 LT |
618 | { |
619 | struct ip_vs_dest *dest, *nxt; | |
620 | ||
621 | /* | |
622 | * Find the destination in trash | |
623 | */ | |
624 | list_for_each_entry_safe(dest, nxt, &ip_vs_dest_trash, n_list) { | |
625 | IP_VS_DBG(3, "Destination %u/%u.%u.%u.%u:%u still in trash, " | |
4b5bdf5c | 626 | "dest->refcnt=%d\n", |
1da177e4 LT |
627 | dest->vfwmark, |
628 | NIPQUAD(dest->addr), ntohs(dest->port), | |
629 | atomic_read(&dest->refcnt)); | |
630 | if (dest->addr == daddr && | |
631 | dest->port == dport && | |
632 | dest->vfwmark == svc->fwmark && | |
633 | dest->protocol == svc->protocol && | |
634 | (svc->fwmark || | |
635 | (dest->vaddr == svc->addr && | |
636 | dest->vport == svc->port))) { | |
637 | /* HIT */ | |
638 | return dest; | |
639 | } | |
640 | ||
641 | /* | |
642 | * Try to purge the destination from trash if not referenced | |
643 | */ | |
644 | if (atomic_read(&dest->refcnt) == 1) { | |
645 | IP_VS_DBG(3, "Removing destination %u/%u.%u.%u.%u:%u " | |
646 | "from trash\n", | |
647 | dest->vfwmark, | |
648 | NIPQUAD(dest->addr), ntohs(dest->port)); | |
649 | list_del(&dest->n_list); | |
650 | ip_vs_dst_reset(dest); | |
651 | __ip_vs_unbind_svc(dest); | |
652 | kfree(dest); | |
653 | } | |
654 | } | |
655 | ||
656 | return NULL; | |
657 | } | |
658 | ||
659 | ||
660 | /* | |
661 | * Clean up all the destinations in the trash | |
662 | * Called by the ip_vs_control_cleanup() | |
663 | * | |
664 | * When the ip_vs_control_clearup is activated by ipvs module exit, | |
665 | * the service tables must have been flushed and all the connections | |
666 | * are expired, and the refcnt of each destination in the trash must | |
667 | * be 1, so we simply release them here. | |
668 | */ | |
669 | static void ip_vs_trash_cleanup(void) | |
670 | { | |
671 | struct ip_vs_dest *dest, *nxt; | |
672 | ||
673 | list_for_each_entry_safe(dest, nxt, &ip_vs_dest_trash, n_list) { | |
674 | list_del(&dest->n_list); | |
675 | ip_vs_dst_reset(dest); | |
676 | __ip_vs_unbind_svc(dest); | |
677 | kfree(dest); | |
678 | } | |
679 | } | |
680 | ||
681 | ||
682 | static void | |
683 | ip_vs_zero_stats(struct ip_vs_stats *stats) | |
684 | { | |
685 | spin_lock_bh(&stats->lock); | |
686 | memset(stats, 0, (char *)&stats->lock - (char *)stats); | |
687 | spin_unlock_bh(&stats->lock); | |
688 | ip_vs_zero_estimator(stats); | |
689 | } | |
690 | ||
691 | /* | |
692 | * Update a destination in the given service | |
693 | */ | |
694 | static void | |
695 | __ip_vs_update_dest(struct ip_vs_service *svc, | |
696 | struct ip_vs_dest *dest, struct ip_vs_dest_user *udest) | |
697 | { | |
698 | int conn_flags; | |
699 | ||
700 | /* set the weight and the flags */ | |
701 | atomic_set(&dest->weight, udest->weight); | |
702 | conn_flags = udest->conn_flags | IP_VS_CONN_F_INACTIVE; | |
703 | ||
704 | /* check if local node and update the flags */ | |
6b175b26 | 705 | if (inet_addr_type(&init_net, udest->addr) == RTN_LOCAL) { |
1da177e4 LT |
706 | conn_flags = (conn_flags & ~IP_VS_CONN_F_FWD_MASK) |
707 | | IP_VS_CONN_F_LOCALNODE; | |
708 | } | |
709 | ||
710 | /* set the IP_VS_CONN_F_NOOUTPUT flag if not masquerading/NAT */ | |
711 | if ((conn_flags & IP_VS_CONN_F_FWD_MASK) != 0) { | |
712 | conn_flags |= IP_VS_CONN_F_NOOUTPUT; | |
713 | } else { | |
714 | /* | |
715 | * Put the real service in ip_vs_rtable if not present. | |
716 | * For now only for NAT! | |
717 | */ | |
718 | write_lock_bh(&__ip_vs_rs_lock); | |
719 | ip_vs_rs_hash(dest); | |
720 | write_unlock_bh(&__ip_vs_rs_lock); | |
721 | } | |
722 | atomic_set(&dest->conn_flags, conn_flags); | |
723 | ||
724 | /* bind the service */ | |
725 | if (!dest->svc) { | |
726 | __ip_vs_bind_svc(dest, svc); | |
727 | } else { | |
728 | if (dest->svc != svc) { | |
729 | __ip_vs_unbind_svc(dest); | |
730 | ip_vs_zero_stats(&dest->stats); | |
731 | __ip_vs_bind_svc(dest, svc); | |
732 | } | |
733 | } | |
734 | ||
735 | /* set the dest status flags */ | |
736 | dest->flags |= IP_VS_DEST_F_AVAILABLE; | |
737 | ||
738 | if (udest->u_threshold == 0 || udest->u_threshold > dest->u_threshold) | |
739 | dest->flags &= ~IP_VS_DEST_F_OVERLOAD; | |
740 | dest->u_threshold = udest->u_threshold; | |
741 | dest->l_threshold = udest->l_threshold; | |
742 | } | |
743 | ||
744 | ||
745 | /* | |
746 | * Create a destination for the given service | |
747 | */ | |
748 | static int | |
749 | ip_vs_new_dest(struct ip_vs_service *svc, struct ip_vs_dest_user *udest, | |
750 | struct ip_vs_dest **dest_p) | |
751 | { | |
752 | struct ip_vs_dest *dest; | |
753 | unsigned atype; | |
754 | ||
755 | EnterFunction(2); | |
756 | ||
6b175b26 | 757 | atype = inet_addr_type(&init_net, udest->addr); |
1da177e4 LT |
758 | if (atype != RTN_LOCAL && atype != RTN_UNICAST) |
759 | return -EINVAL; | |
760 | ||
0da974f4 | 761 | dest = kzalloc(sizeof(struct ip_vs_dest), GFP_ATOMIC); |
1da177e4 LT |
762 | if (dest == NULL) { |
763 | IP_VS_ERR("ip_vs_new_dest: kmalloc failed.\n"); | |
764 | return -ENOMEM; | |
765 | } | |
1da177e4 LT |
766 | |
767 | dest->protocol = svc->protocol; | |
768 | dest->vaddr = svc->addr; | |
769 | dest->vport = svc->port; | |
770 | dest->vfwmark = svc->fwmark; | |
771 | dest->addr = udest->addr; | |
772 | dest->port = udest->port; | |
773 | ||
774 | atomic_set(&dest->activeconns, 0); | |
775 | atomic_set(&dest->inactconns, 0); | |
776 | atomic_set(&dest->persistconns, 0); | |
777 | atomic_set(&dest->refcnt, 0); | |
778 | ||
779 | INIT_LIST_HEAD(&dest->d_list); | |
780 | spin_lock_init(&dest->dst_lock); | |
781 | spin_lock_init(&dest->stats.lock); | |
782 | __ip_vs_update_dest(svc, dest, udest); | |
783 | ip_vs_new_estimator(&dest->stats); | |
784 | ||
785 | *dest_p = dest; | |
786 | ||
787 | LeaveFunction(2); | |
788 | return 0; | |
789 | } | |
790 | ||
791 | ||
792 | /* | |
793 | * Add a destination into an existing service | |
794 | */ | |
795 | static int | |
796 | ip_vs_add_dest(struct ip_vs_service *svc, struct ip_vs_dest_user *udest) | |
797 | { | |
798 | struct ip_vs_dest *dest; | |
014d730d AV |
799 | __be32 daddr = udest->addr; |
800 | __be16 dport = udest->port; | |
1da177e4 LT |
801 | int ret; |
802 | ||
803 | EnterFunction(2); | |
804 | ||
805 | if (udest->weight < 0) { | |
806 | IP_VS_ERR("ip_vs_add_dest(): server weight less than zero\n"); | |
807 | return -ERANGE; | |
808 | } | |
809 | ||
810 | if (udest->l_threshold > udest->u_threshold) { | |
811 | IP_VS_ERR("ip_vs_add_dest(): lower threshold is higher than " | |
812 | "upper threshold\n"); | |
813 | return -ERANGE; | |
814 | } | |
815 | ||
816 | /* | |
817 | * Check if the dest already exists in the list | |
818 | */ | |
819 | dest = ip_vs_lookup_dest(svc, daddr, dport); | |
820 | if (dest != NULL) { | |
821 | IP_VS_DBG(1, "ip_vs_add_dest(): dest already exists\n"); | |
822 | return -EEXIST; | |
823 | } | |
824 | ||
825 | /* | |
826 | * Check if the dest already exists in the trash and | |
827 | * is from the same service | |
828 | */ | |
829 | dest = ip_vs_trash_get_dest(svc, daddr, dport); | |
830 | if (dest != NULL) { | |
831 | IP_VS_DBG(3, "Get destination %u.%u.%u.%u:%u from trash, " | |
4b5bdf5c | 832 | "dest->refcnt=%d, service %u/%u.%u.%u.%u:%u\n", |
1da177e4 LT |
833 | NIPQUAD(daddr), ntohs(dport), |
834 | atomic_read(&dest->refcnt), | |
835 | dest->vfwmark, | |
836 | NIPQUAD(dest->vaddr), | |
837 | ntohs(dest->vport)); | |
838 | __ip_vs_update_dest(svc, dest, udest); | |
839 | ||
840 | /* | |
841 | * Get the destination from the trash | |
842 | */ | |
843 | list_del(&dest->n_list); | |
844 | ||
845 | ip_vs_new_estimator(&dest->stats); | |
846 | ||
847 | write_lock_bh(&__ip_vs_svc_lock); | |
848 | ||
849 | /* | |
850 | * Wait until all other svc users go away. | |
851 | */ | |
852 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1); | |
853 | ||
854 | list_add(&dest->n_list, &svc->destinations); | |
855 | svc->num_dests++; | |
856 | ||
857 | /* call the update_service function of its scheduler */ | |
858 | svc->scheduler->update_service(svc); | |
859 | ||
860 | write_unlock_bh(&__ip_vs_svc_lock); | |
861 | return 0; | |
862 | } | |
863 | ||
864 | /* | |
865 | * Allocate and initialize the dest structure | |
866 | */ | |
867 | ret = ip_vs_new_dest(svc, udest, &dest); | |
868 | if (ret) { | |
869 | return ret; | |
870 | } | |
871 | ||
872 | /* | |
873 | * Add the dest entry into the list | |
874 | */ | |
875 | atomic_inc(&dest->refcnt); | |
876 | ||
877 | write_lock_bh(&__ip_vs_svc_lock); | |
878 | ||
879 | /* | |
880 | * Wait until all other svc users go away. | |
881 | */ | |
882 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1); | |
883 | ||
884 | list_add(&dest->n_list, &svc->destinations); | |
885 | svc->num_dests++; | |
886 | ||
887 | /* call the update_service function of its scheduler */ | |
888 | svc->scheduler->update_service(svc); | |
889 | ||
890 | write_unlock_bh(&__ip_vs_svc_lock); | |
891 | ||
892 | LeaveFunction(2); | |
893 | ||
894 | return 0; | |
895 | } | |
896 | ||
897 | ||
898 | /* | |
899 | * Edit a destination in the given service | |
900 | */ | |
901 | static int | |
902 | ip_vs_edit_dest(struct ip_vs_service *svc, struct ip_vs_dest_user *udest) | |
903 | { | |
904 | struct ip_vs_dest *dest; | |
014d730d AV |
905 | __be32 daddr = udest->addr; |
906 | __be16 dport = udest->port; | |
1da177e4 LT |
907 | |
908 | EnterFunction(2); | |
909 | ||
910 | if (udest->weight < 0) { | |
911 | IP_VS_ERR("ip_vs_edit_dest(): server weight less than zero\n"); | |
912 | return -ERANGE; | |
913 | } | |
914 | ||
915 | if (udest->l_threshold > udest->u_threshold) { | |
916 | IP_VS_ERR("ip_vs_edit_dest(): lower threshold is higher than " | |
917 | "upper threshold\n"); | |
918 | return -ERANGE; | |
919 | } | |
920 | ||
921 | /* | |
922 | * Lookup the destination list | |
923 | */ | |
924 | dest = ip_vs_lookup_dest(svc, daddr, dport); | |
925 | if (dest == NULL) { | |
926 | IP_VS_DBG(1, "ip_vs_edit_dest(): dest doesn't exist\n"); | |
927 | return -ENOENT; | |
928 | } | |
929 | ||
930 | __ip_vs_update_dest(svc, dest, udest); | |
931 | ||
932 | write_lock_bh(&__ip_vs_svc_lock); | |
933 | ||
934 | /* Wait until all other svc users go away */ | |
cae7ca3d | 935 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1); |
1da177e4 LT |
936 | |
937 | /* call the update_service, because server weight may be changed */ | |
938 | svc->scheduler->update_service(svc); | |
939 | ||
940 | write_unlock_bh(&__ip_vs_svc_lock); | |
941 | ||
942 | LeaveFunction(2); | |
943 | ||
944 | return 0; | |
945 | } | |
946 | ||
947 | ||
948 | /* | |
949 | * Delete a destination (must be already unlinked from the service) | |
950 | */ | |
951 | static void __ip_vs_del_dest(struct ip_vs_dest *dest) | |
952 | { | |
953 | ip_vs_kill_estimator(&dest->stats); | |
954 | ||
955 | /* | |
956 | * Remove it from the d-linked list with the real services. | |
957 | */ | |
958 | write_lock_bh(&__ip_vs_rs_lock); | |
959 | ip_vs_rs_unhash(dest); | |
960 | write_unlock_bh(&__ip_vs_rs_lock); | |
961 | ||
962 | /* | |
963 | * Decrease the refcnt of the dest, and free the dest | |
964 | * if nobody refers to it (refcnt=0). Otherwise, throw | |
965 | * the destination into the trash. | |
966 | */ | |
967 | if (atomic_dec_and_test(&dest->refcnt)) { | |
968 | ip_vs_dst_reset(dest); | |
969 | /* simply decrease svc->refcnt here, let the caller check | |
970 | and release the service if nobody refers to it. | |
971 | Only user context can release destination and service, | |
972 | and only one user context can update virtual service at a | |
973 | time, so the operation here is OK */ | |
974 | atomic_dec(&dest->svc->refcnt); | |
975 | kfree(dest); | |
976 | } else { | |
4b5bdf5c RN |
977 | IP_VS_DBG(3, "Moving dest %u.%u.%u.%u:%u into trash, " |
978 | "dest->refcnt=%d\n", | |
1da177e4 LT |
979 | NIPQUAD(dest->addr), ntohs(dest->port), |
980 | atomic_read(&dest->refcnt)); | |
981 | list_add(&dest->n_list, &ip_vs_dest_trash); | |
982 | atomic_inc(&dest->refcnt); | |
983 | } | |
984 | } | |
985 | ||
986 | ||
987 | /* | |
988 | * Unlink a destination from the given service | |
989 | */ | |
990 | static void __ip_vs_unlink_dest(struct ip_vs_service *svc, | |
991 | struct ip_vs_dest *dest, | |
992 | int svcupd) | |
993 | { | |
994 | dest->flags &= ~IP_VS_DEST_F_AVAILABLE; | |
995 | ||
996 | /* | |
997 | * Remove it from the d-linked destination list. | |
998 | */ | |
999 | list_del(&dest->n_list); | |
1000 | svc->num_dests--; | |
1001 | if (svcupd) { | |
1002 | /* | |
1003 | * Call the update_service function of its scheduler | |
1004 | */ | |
1005 | svc->scheduler->update_service(svc); | |
1006 | } | |
1007 | } | |
1008 | ||
1009 | ||
1010 | /* | |
1011 | * Delete a destination server in the given service | |
1012 | */ | |
1013 | static int | |
1014 | ip_vs_del_dest(struct ip_vs_service *svc,struct ip_vs_dest_user *udest) | |
1015 | { | |
1016 | struct ip_vs_dest *dest; | |
014d730d AV |
1017 | __be32 daddr = udest->addr; |
1018 | __be16 dport = udest->port; | |
1da177e4 LT |
1019 | |
1020 | EnterFunction(2); | |
1021 | ||
1022 | dest = ip_vs_lookup_dest(svc, daddr, dport); | |
1023 | if (dest == NULL) { | |
1024 | IP_VS_DBG(1, "ip_vs_del_dest(): destination not found!\n"); | |
1025 | return -ENOENT; | |
1026 | } | |
1027 | ||
1028 | write_lock_bh(&__ip_vs_svc_lock); | |
1029 | ||
1030 | /* | |
1031 | * Wait until all other svc users go away. | |
1032 | */ | |
1033 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1); | |
1034 | ||
1035 | /* | |
1036 | * Unlink dest from the service | |
1037 | */ | |
1038 | __ip_vs_unlink_dest(svc, dest, 1); | |
1039 | ||
1040 | write_unlock_bh(&__ip_vs_svc_lock); | |
1041 | ||
1042 | /* | |
1043 | * Delete the destination | |
1044 | */ | |
1045 | __ip_vs_del_dest(dest); | |
1046 | ||
1047 | LeaveFunction(2); | |
1048 | ||
1049 | return 0; | |
1050 | } | |
1051 | ||
1052 | ||
1053 | /* | |
1054 | * Add a service into the service hash table | |
1055 | */ | |
1056 | static int | |
1057 | ip_vs_add_service(struct ip_vs_service_user *u, struct ip_vs_service **svc_p) | |
1058 | { | |
1059 | int ret = 0; | |
1060 | struct ip_vs_scheduler *sched = NULL; | |
1061 | struct ip_vs_service *svc = NULL; | |
1062 | ||
1063 | /* increase the module use count */ | |
1064 | ip_vs_use_count_inc(); | |
1065 | ||
1066 | /* Lookup the scheduler by 'u->sched_name' */ | |
1067 | sched = ip_vs_scheduler_get(u->sched_name); | |
1068 | if (sched == NULL) { | |
1069 | IP_VS_INFO("Scheduler module ip_vs_%s not found\n", | |
1070 | u->sched_name); | |
1071 | ret = -ENOENT; | |
1072 | goto out_mod_dec; | |
1073 | } | |
1074 | ||
0da974f4 | 1075 | svc = kzalloc(sizeof(struct ip_vs_service), GFP_ATOMIC); |
1da177e4 LT |
1076 | if (svc == NULL) { |
1077 | IP_VS_DBG(1, "ip_vs_add_service: kmalloc failed.\n"); | |
1078 | ret = -ENOMEM; | |
1079 | goto out_err; | |
1080 | } | |
1da177e4 LT |
1081 | |
1082 | /* I'm the first user of the service */ | |
1083 | atomic_set(&svc->usecnt, 1); | |
1084 | atomic_set(&svc->refcnt, 0); | |
1085 | ||
1086 | svc->protocol = u->protocol; | |
1087 | svc->addr = u->addr; | |
1088 | svc->port = u->port; | |
1089 | svc->fwmark = u->fwmark; | |
1090 | svc->flags = u->flags; | |
1091 | svc->timeout = u->timeout * HZ; | |
1092 | svc->netmask = u->netmask; | |
1093 | ||
1094 | INIT_LIST_HEAD(&svc->destinations); | |
1095 | rwlock_init(&svc->sched_lock); | |
1096 | spin_lock_init(&svc->stats.lock); | |
1097 | ||
1098 | /* Bind the scheduler */ | |
1099 | ret = ip_vs_bind_scheduler(svc, sched); | |
1100 | if (ret) | |
1101 | goto out_err; | |
1102 | sched = NULL; | |
1103 | ||
1104 | /* Update the virtual service counters */ | |
1105 | if (svc->port == FTPPORT) | |
1106 | atomic_inc(&ip_vs_ftpsvc_counter); | |
1107 | else if (svc->port == 0) | |
1108 | atomic_inc(&ip_vs_nullsvc_counter); | |
1109 | ||
1110 | ip_vs_new_estimator(&svc->stats); | |
1111 | ip_vs_num_services++; | |
1112 | ||
1113 | /* Hash the service into the service table */ | |
1114 | write_lock_bh(&__ip_vs_svc_lock); | |
1115 | ip_vs_svc_hash(svc); | |
1116 | write_unlock_bh(&__ip_vs_svc_lock); | |
1117 | ||
1118 | *svc_p = svc; | |
1119 | return 0; | |
1120 | ||
1121 | out_err: | |
1122 | if (svc != NULL) { | |
1123 | if (svc->scheduler) | |
1124 | ip_vs_unbind_scheduler(svc); | |
1125 | if (svc->inc) { | |
1126 | local_bh_disable(); | |
1127 | ip_vs_app_inc_put(svc->inc); | |
1128 | local_bh_enable(); | |
1129 | } | |
1130 | kfree(svc); | |
1131 | } | |
1132 | ip_vs_scheduler_put(sched); | |
1133 | ||
1134 | out_mod_dec: | |
1135 | /* decrease the module use count */ | |
1136 | ip_vs_use_count_dec(); | |
1137 | ||
1138 | return ret; | |
1139 | } | |
1140 | ||
1141 | ||
1142 | /* | |
1143 | * Edit a service and bind it with a new scheduler | |
1144 | */ | |
1145 | static int | |
1146 | ip_vs_edit_service(struct ip_vs_service *svc, struct ip_vs_service_user *u) | |
1147 | { | |
1148 | struct ip_vs_scheduler *sched, *old_sched; | |
1149 | int ret = 0; | |
1150 | ||
1151 | /* | |
1152 | * Lookup the scheduler, by 'u->sched_name' | |
1153 | */ | |
1154 | sched = ip_vs_scheduler_get(u->sched_name); | |
1155 | if (sched == NULL) { | |
1156 | IP_VS_INFO("Scheduler module ip_vs_%s not found\n", | |
1157 | u->sched_name); | |
1158 | return -ENOENT; | |
1159 | } | |
1160 | old_sched = sched; | |
1161 | ||
1162 | write_lock_bh(&__ip_vs_svc_lock); | |
1163 | ||
1164 | /* | |
1165 | * Wait until all other svc users go away. | |
1166 | */ | |
1167 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1); | |
1168 | ||
1169 | /* | |
1170 | * Set the flags and timeout value | |
1171 | */ | |
1172 | svc->flags = u->flags | IP_VS_SVC_F_HASHED; | |
1173 | svc->timeout = u->timeout * HZ; | |
1174 | svc->netmask = u->netmask; | |
1175 | ||
1176 | old_sched = svc->scheduler; | |
1177 | if (sched != old_sched) { | |
1178 | /* | |
1179 | * Unbind the old scheduler | |
1180 | */ | |
1181 | if ((ret = ip_vs_unbind_scheduler(svc))) { | |
1182 | old_sched = sched; | |
1183 | goto out; | |
1184 | } | |
1185 | ||
1186 | /* | |
1187 | * Bind the new scheduler | |
1188 | */ | |
1189 | if ((ret = ip_vs_bind_scheduler(svc, sched))) { | |
1190 | /* | |
1191 | * If ip_vs_bind_scheduler fails, restore the old | |
1192 | * scheduler. | |
1193 | * The main reason of failure is out of memory. | |
1194 | * | |
1195 | * The question is if the old scheduler can be | |
1196 | * restored all the time. TODO: if it cannot be | |
1197 | * restored some time, we must delete the service, | |
1198 | * otherwise the system may crash. | |
1199 | */ | |
1200 | ip_vs_bind_scheduler(svc, old_sched); | |
1201 | old_sched = sched; | |
1202 | goto out; | |
1203 | } | |
1204 | } | |
1205 | ||
1206 | out: | |
1207 | write_unlock_bh(&__ip_vs_svc_lock); | |
1208 | ||
1209 | if (old_sched) | |
1210 | ip_vs_scheduler_put(old_sched); | |
1211 | ||
1212 | return ret; | |
1213 | } | |
1214 | ||
1215 | ||
1216 | /* | |
1217 | * Delete a service from the service list | |
1218 | * - The service must be unlinked, unlocked and not referenced! | |
1219 | * - We are called under _bh lock | |
1220 | */ | |
1221 | static void __ip_vs_del_service(struct ip_vs_service *svc) | |
1222 | { | |
1223 | struct ip_vs_dest *dest, *nxt; | |
1224 | struct ip_vs_scheduler *old_sched; | |
1225 | ||
1226 | ip_vs_num_services--; | |
1227 | ip_vs_kill_estimator(&svc->stats); | |
1228 | ||
1229 | /* Unbind scheduler */ | |
1230 | old_sched = svc->scheduler; | |
1231 | ip_vs_unbind_scheduler(svc); | |
1232 | if (old_sched) | |
1233 | ip_vs_scheduler_put(old_sched); | |
1234 | ||
1235 | /* Unbind app inc */ | |
1236 | if (svc->inc) { | |
1237 | ip_vs_app_inc_put(svc->inc); | |
1238 | svc->inc = NULL; | |
1239 | } | |
1240 | ||
1241 | /* | |
1242 | * Unlink the whole destination list | |
1243 | */ | |
1244 | list_for_each_entry_safe(dest, nxt, &svc->destinations, n_list) { | |
1245 | __ip_vs_unlink_dest(svc, dest, 0); | |
1246 | __ip_vs_del_dest(dest); | |
1247 | } | |
1248 | ||
1249 | /* | |
1250 | * Update the virtual service counters | |
1251 | */ | |
1252 | if (svc->port == FTPPORT) | |
1253 | atomic_dec(&ip_vs_ftpsvc_counter); | |
1254 | else if (svc->port == 0) | |
1255 | atomic_dec(&ip_vs_nullsvc_counter); | |
1256 | ||
1257 | /* | |
1258 | * Free the service if nobody refers to it | |
1259 | */ | |
1260 | if (atomic_read(&svc->refcnt) == 0) | |
1261 | kfree(svc); | |
1262 | ||
1263 | /* decrease the module use count */ | |
1264 | ip_vs_use_count_dec(); | |
1265 | } | |
1266 | ||
1267 | /* | |
1268 | * Delete a service from the service list | |
1269 | */ | |
1270 | static int ip_vs_del_service(struct ip_vs_service *svc) | |
1271 | { | |
1272 | if (svc == NULL) | |
1273 | return -EEXIST; | |
1274 | ||
1275 | /* | |
1276 | * Unhash it from the service table | |
1277 | */ | |
1278 | write_lock_bh(&__ip_vs_svc_lock); | |
1279 | ||
1280 | ip_vs_svc_unhash(svc); | |
1281 | ||
1282 | /* | |
1283 | * Wait until all the svc users go away. | |
1284 | */ | |
1285 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1); | |
1286 | ||
1287 | __ip_vs_del_service(svc); | |
1288 | ||
1289 | write_unlock_bh(&__ip_vs_svc_lock); | |
1290 | ||
1291 | return 0; | |
1292 | } | |
1293 | ||
1294 | ||
1295 | /* | |
1296 | * Flush all the virtual services | |
1297 | */ | |
1298 | static int ip_vs_flush(void) | |
1299 | { | |
1300 | int idx; | |
1301 | struct ip_vs_service *svc, *nxt; | |
1302 | ||
1303 | /* | |
1304 | * Flush the service table hashed by <protocol,addr,port> | |
1305 | */ | |
1306 | for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
1307 | list_for_each_entry_safe(svc, nxt, &ip_vs_svc_table[idx], s_list) { | |
1308 | write_lock_bh(&__ip_vs_svc_lock); | |
1309 | ip_vs_svc_unhash(svc); | |
1310 | /* | |
1311 | * Wait until all the svc users go away. | |
1312 | */ | |
1313 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 0); | |
1314 | __ip_vs_del_service(svc); | |
1315 | write_unlock_bh(&__ip_vs_svc_lock); | |
1316 | } | |
1317 | } | |
1318 | ||
1319 | /* | |
1320 | * Flush the service table hashed by fwmark | |
1321 | */ | |
1322 | for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
1323 | list_for_each_entry_safe(svc, nxt, | |
1324 | &ip_vs_svc_fwm_table[idx], f_list) { | |
1325 | write_lock_bh(&__ip_vs_svc_lock); | |
1326 | ip_vs_svc_unhash(svc); | |
1327 | /* | |
1328 | * Wait until all the svc users go away. | |
1329 | */ | |
1330 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 0); | |
1331 | __ip_vs_del_service(svc); | |
1332 | write_unlock_bh(&__ip_vs_svc_lock); | |
1333 | } | |
1334 | } | |
1335 | ||
1336 | return 0; | |
1337 | } | |
1338 | ||
1339 | ||
1340 | /* | |
1341 | * Zero counters in a service or all services | |
1342 | */ | |
1343 | static int ip_vs_zero_service(struct ip_vs_service *svc) | |
1344 | { | |
1345 | struct ip_vs_dest *dest; | |
1346 | ||
1347 | write_lock_bh(&__ip_vs_svc_lock); | |
1348 | list_for_each_entry(dest, &svc->destinations, n_list) { | |
1349 | ip_vs_zero_stats(&dest->stats); | |
1350 | } | |
1351 | ip_vs_zero_stats(&svc->stats); | |
1352 | write_unlock_bh(&__ip_vs_svc_lock); | |
1353 | return 0; | |
1354 | } | |
1355 | ||
1356 | static int ip_vs_zero_all(void) | |
1357 | { | |
1358 | int idx; | |
1359 | struct ip_vs_service *svc; | |
1360 | ||
1361 | for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
1362 | list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) { | |
1363 | ip_vs_zero_service(svc); | |
1364 | } | |
1365 | } | |
1366 | ||
1367 | for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
1368 | list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) { | |
1369 | ip_vs_zero_service(svc); | |
1370 | } | |
1371 | } | |
1372 | ||
1373 | ip_vs_zero_stats(&ip_vs_stats); | |
1374 | return 0; | |
1375 | } | |
1376 | ||
1377 | ||
1378 | static int | |
1379 | proc_do_defense_mode(ctl_table *table, int write, struct file * filp, | |
1380 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
1381 | { | |
1382 | int *valp = table->data; | |
1383 | int val = *valp; | |
1384 | int rc; | |
1385 | ||
1386 | rc = proc_dointvec(table, write, filp, buffer, lenp, ppos); | |
1387 | if (write && (*valp != val)) { | |
1388 | if ((*valp < 0) || (*valp > 3)) { | |
1389 | /* Restore the correct value */ | |
1390 | *valp = val; | |
1391 | } else { | |
1da177e4 | 1392 | update_defense_level(); |
1da177e4 LT |
1393 | } |
1394 | } | |
1395 | return rc; | |
1396 | } | |
1397 | ||
1398 | ||
1399 | static int | |
1400 | proc_do_sync_threshold(ctl_table *table, int write, struct file *filp, | |
1401 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
1402 | { | |
1403 | int *valp = table->data; | |
1404 | int val[2]; | |
1405 | int rc; | |
1406 | ||
1407 | /* backup the value first */ | |
1408 | memcpy(val, valp, sizeof(val)); | |
1409 | ||
1410 | rc = proc_dointvec(table, write, filp, buffer, lenp, ppos); | |
1411 | if (write && (valp[0] < 0 || valp[1] < 0 || valp[0] >= valp[1])) { | |
1412 | /* Restore the correct value */ | |
1413 | memcpy(valp, val, sizeof(val)); | |
1414 | } | |
1415 | return rc; | |
1416 | } | |
1417 | ||
1418 | ||
1419 | /* | |
1420 | * IPVS sysctl table (under the /proc/sys/net/ipv4/vs/) | |
1421 | */ | |
1422 | ||
1423 | static struct ctl_table vs_vars[] = { | |
1424 | { | |
1da177e4 LT |
1425 | .procname = "amemthresh", |
1426 | .data = &sysctl_ip_vs_amemthresh, | |
1427 | .maxlen = sizeof(int), | |
1428 | .mode = 0644, | |
1429 | .proc_handler = &proc_dointvec, | |
1430 | }, | |
1431 | #ifdef CONFIG_IP_VS_DEBUG | |
1432 | { | |
1da177e4 LT |
1433 | .procname = "debug_level", |
1434 | .data = &sysctl_ip_vs_debug_level, | |
1435 | .maxlen = sizeof(int), | |
1436 | .mode = 0644, | |
1437 | .proc_handler = &proc_dointvec, | |
1438 | }, | |
1439 | #endif | |
1440 | { | |
1da177e4 LT |
1441 | .procname = "am_droprate", |
1442 | .data = &sysctl_ip_vs_am_droprate, | |
1443 | .maxlen = sizeof(int), | |
1444 | .mode = 0644, | |
1445 | .proc_handler = &proc_dointvec, | |
1446 | }, | |
1447 | { | |
1da177e4 LT |
1448 | .procname = "drop_entry", |
1449 | .data = &sysctl_ip_vs_drop_entry, | |
1450 | .maxlen = sizeof(int), | |
1451 | .mode = 0644, | |
1452 | .proc_handler = &proc_do_defense_mode, | |
1453 | }, | |
1454 | { | |
1da177e4 LT |
1455 | .procname = "drop_packet", |
1456 | .data = &sysctl_ip_vs_drop_packet, | |
1457 | .maxlen = sizeof(int), | |
1458 | .mode = 0644, | |
1459 | .proc_handler = &proc_do_defense_mode, | |
1460 | }, | |
1461 | { | |
1da177e4 LT |
1462 | .procname = "secure_tcp", |
1463 | .data = &sysctl_ip_vs_secure_tcp, | |
1464 | .maxlen = sizeof(int), | |
1465 | .mode = 0644, | |
1466 | .proc_handler = &proc_do_defense_mode, | |
1467 | }, | |
1468 | #if 0 | |
1469 | { | |
1da177e4 LT |
1470 | .procname = "timeout_established", |
1471 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_ESTABLISHED], | |
1472 | .maxlen = sizeof(int), | |
1473 | .mode = 0644, | |
1474 | .proc_handler = &proc_dointvec_jiffies, | |
1475 | }, | |
1476 | { | |
1da177e4 LT |
1477 | .procname = "timeout_synsent", |
1478 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYN_SENT], | |
1479 | .maxlen = sizeof(int), | |
1480 | .mode = 0644, | |
1481 | .proc_handler = &proc_dointvec_jiffies, | |
1482 | }, | |
1483 | { | |
1da177e4 LT |
1484 | .procname = "timeout_synrecv", |
1485 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYN_RECV], | |
1486 | .maxlen = sizeof(int), | |
1487 | .mode = 0644, | |
1488 | .proc_handler = &proc_dointvec_jiffies, | |
1489 | }, | |
1490 | { | |
1da177e4 LT |
1491 | .procname = "timeout_finwait", |
1492 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_FIN_WAIT], | |
1493 | .maxlen = sizeof(int), | |
1494 | .mode = 0644, | |
1495 | .proc_handler = &proc_dointvec_jiffies, | |
1496 | }, | |
1497 | { | |
1da177e4 LT |
1498 | .procname = "timeout_timewait", |
1499 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_TIME_WAIT], | |
1500 | .maxlen = sizeof(int), | |
1501 | .mode = 0644, | |
1502 | .proc_handler = &proc_dointvec_jiffies, | |
1503 | }, | |
1504 | { | |
1da177e4 LT |
1505 | .procname = "timeout_close", |
1506 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_CLOSE], | |
1507 | .maxlen = sizeof(int), | |
1508 | .mode = 0644, | |
1509 | .proc_handler = &proc_dointvec_jiffies, | |
1510 | }, | |
1511 | { | |
1da177e4 LT |
1512 | .procname = "timeout_closewait", |
1513 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_CLOSE_WAIT], | |
1514 | .maxlen = sizeof(int), | |
1515 | .mode = 0644, | |
1516 | .proc_handler = &proc_dointvec_jiffies, | |
1517 | }, | |
1518 | { | |
1da177e4 LT |
1519 | .procname = "timeout_lastack", |
1520 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_LAST_ACK], | |
1521 | .maxlen = sizeof(int), | |
1522 | .mode = 0644, | |
1523 | .proc_handler = &proc_dointvec_jiffies, | |
1524 | }, | |
1525 | { | |
1da177e4 LT |
1526 | .procname = "timeout_listen", |
1527 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_LISTEN], | |
1528 | .maxlen = sizeof(int), | |
1529 | .mode = 0644, | |
1530 | .proc_handler = &proc_dointvec_jiffies, | |
1531 | }, | |
1532 | { | |
1da177e4 LT |
1533 | .procname = "timeout_synack", |
1534 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYNACK], | |
1535 | .maxlen = sizeof(int), | |
1536 | .mode = 0644, | |
1537 | .proc_handler = &proc_dointvec_jiffies, | |
1538 | }, | |
1539 | { | |
1da177e4 LT |
1540 | .procname = "timeout_udp", |
1541 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_UDP], | |
1542 | .maxlen = sizeof(int), | |
1543 | .mode = 0644, | |
1544 | .proc_handler = &proc_dointvec_jiffies, | |
1545 | }, | |
1546 | { | |
1da177e4 LT |
1547 | .procname = "timeout_icmp", |
1548 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_ICMP], | |
1549 | .maxlen = sizeof(int), | |
1550 | .mode = 0644, | |
1551 | .proc_handler = &proc_dointvec_jiffies, | |
1552 | }, | |
1553 | #endif | |
1554 | { | |
1da177e4 LT |
1555 | .procname = "cache_bypass", |
1556 | .data = &sysctl_ip_vs_cache_bypass, | |
1557 | .maxlen = sizeof(int), | |
1558 | .mode = 0644, | |
1559 | .proc_handler = &proc_dointvec, | |
1560 | }, | |
1561 | { | |
1da177e4 LT |
1562 | .procname = "expire_nodest_conn", |
1563 | .data = &sysctl_ip_vs_expire_nodest_conn, | |
1564 | .maxlen = sizeof(int), | |
1565 | .mode = 0644, | |
1566 | .proc_handler = &proc_dointvec, | |
1567 | }, | |
1568 | { | |
1da177e4 LT |
1569 | .procname = "expire_quiescent_template", |
1570 | .data = &sysctl_ip_vs_expire_quiescent_template, | |
1571 | .maxlen = sizeof(int), | |
1572 | .mode = 0644, | |
1573 | .proc_handler = &proc_dointvec, | |
1574 | }, | |
1575 | { | |
1da177e4 LT |
1576 | .procname = "sync_threshold", |
1577 | .data = &sysctl_ip_vs_sync_threshold, | |
1578 | .maxlen = sizeof(sysctl_ip_vs_sync_threshold), | |
1579 | .mode = 0644, | |
1580 | .proc_handler = &proc_do_sync_threshold, | |
1581 | }, | |
1582 | { | |
1da177e4 LT |
1583 | .procname = "nat_icmp_send", |
1584 | .data = &sysctl_ip_vs_nat_icmp_send, | |
1585 | .maxlen = sizeof(int), | |
1586 | .mode = 0644, | |
1587 | .proc_handler = &proc_dointvec, | |
1588 | }, | |
1589 | { .ctl_name = 0 } | |
1590 | }; | |
1591 | ||
90754f8e PE |
1592 | struct ctl_path net_vs_ctl_path[] = { |
1593 | { .procname = "net", .ctl_name = CTL_NET, }, | |
1594 | { .procname = "ipv4", .ctl_name = NET_IPV4, }, | |
1595 | { .procname = "vs", }, | |
1596 | { } | |
1da177e4 | 1597 | }; |
90754f8e | 1598 | EXPORT_SYMBOL_GPL(net_vs_ctl_path); |
1da177e4 LT |
1599 | |
1600 | static struct ctl_table_header * sysctl_header; | |
1601 | ||
1602 | #ifdef CONFIG_PROC_FS | |
1603 | ||
1604 | struct ip_vs_iter { | |
1605 | struct list_head *table; | |
1606 | int bucket; | |
1607 | }; | |
1608 | ||
1609 | /* | |
1610 | * Write the contents of the VS rule table to a PROCfs file. | |
1611 | * (It is kept just for backward compatibility) | |
1612 | */ | |
1613 | static inline const char *ip_vs_fwd_name(unsigned flags) | |
1614 | { | |
1615 | switch (flags & IP_VS_CONN_F_FWD_MASK) { | |
1616 | case IP_VS_CONN_F_LOCALNODE: | |
1617 | return "Local"; | |
1618 | case IP_VS_CONN_F_TUNNEL: | |
1619 | return "Tunnel"; | |
1620 | case IP_VS_CONN_F_DROUTE: | |
1621 | return "Route"; | |
1622 | default: | |
1623 | return "Masq"; | |
1624 | } | |
1625 | } | |
1626 | ||
1627 | ||
1628 | /* Get the Nth entry in the two lists */ | |
1629 | static struct ip_vs_service *ip_vs_info_array(struct seq_file *seq, loff_t pos) | |
1630 | { | |
1631 | struct ip_vs_iter *iter = seq->private; | |
1632 | int idx; | |
1633 | struct ip_vs_service *svc; | |
1634 | ||
1635 | /* look in hash by protocol */ | |
1636 | for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
1637 | list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) { | |
1638 | if (pos-- == 0){ | |
1639 | iter->table = ip_vs_svc_table; | |
1640 | iter->bucket = idx; | |
1641 | return svc; | |
1642 | } | |
1643 | } | |
1644 | } | |
1645 | ||
1646 | /* keep looking in fwmark */ | |
1647 | for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
1648 | list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) { | |
1649 | if (pos-- == 0) { | |
1650 | iter->table = ip_vs_svc_fwm_table; | |
1651 | iter->bucket = idx; | |
1652 | return svc; | |
1653 | } | |
1654 | } | |
1655 | } | |
1656 | ||
1657 | return NULL; | |
1658 | } | |
1659 | ||
1660 | static void *ip_vs_info_seq_start(struct seq_file *seq, loff_t *pos) | |
1661 | { | |
1662 | ||
1663 | read_lock_bh(&__ip_vs_svc_lock); | |
1664 | return *pos ? ip_vs_info_array(seq, *pos - 1) : SEQ_START_TOKEN; | |
1665 | } | |
1666 | ||
1667 | ||
1668 | static void *ip_vs_info_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1669 | { | |
1670 | struct list_head *e; | |
1671 | struct ip_vs_iter *iter; | |
1672 | struct ip_vs_service *svc; | |
1673 | ||
1674 | ++*pos; | |
1675 | if (v == SEQ_START_TOKEN) | |
1676 | return ip_vs_info_array(seq,0); | |
1677 | ||
1678 | svc = v; | |
1679 | iter = seq->private; | |
1680 | ||
1681 | if (iter->table == ip_vs_svc_table) { | |
1682 | /* next service in table hashed by protocol */ | |
1683 | if ((e = svc->s_list.next) != &ip_vs_svc_table[iter->bucket]) | |
1684 | return list_entry(e, struct ip_vs_service, s_list); | |
1685 | ||
1686 | ||
1687 | while (++iter->bucket < IP_VS_SVC_TAB_SIZE) { | |
1688 | list_for_each_entry(svc,&ip_vs_svc_table[iter->bucket], | |
1689 | s_list) { | |
1690 | return svc; | |
1691 | } | |
1692 | } | |
1693 | ||
1694 | iter->table = ip_vs_svc_fwm_table; | |
1695 | iter->bucket = -1; | |
1696 | goto scan_fwmark; | |
1697 | } | |
1698 | ||
1699 | /* next service in hashed by fwmark */ | |
1700 | if ((e = svc->f_list.next) != &ip_vs_svc_fwm_table[iter->bucket]) | |
1701 | return list_entry(e, struct ip_vs_service, f_list); | |
1702 | ||
1703 | scan_fwmark: | |
1704 | while (++iter->bucket < IP_VS_SVC_TAB_SIZE) { | |
1705 | list_for_each_entry(svc, &ip_vs_svc_fwm_table[iter->bucket], | |
1706 | f_list) | |
1707 | return svc; | |
1708 | } | |
1709 | ||
1710 | return NULL; | |
1711 | } | |
1712 | ||
1713 | static void ip_vs_info_seq_stop(struct seq_file *seq, void *v) | |
1714 | { | |
1715 | read_unlock_bh(&__ip_vs_svc_lock); | |
1716 | } | |
1717 | ||
1718 | ||
1719 | static int ip_vs_info_seq_show(struct seq_file *seq, void *v) | |
1720 | { | |
1721 | if (v == SEQ_START_TOKEN) { | |
1722 | seq_printf(seq, | |
1723 | "IP Virtual Server version %d.%d.%d (size=%d)\n", | |
1724 | NVERSION(IP_VS_VERSION_CODE), IP_VS_CONN_TAB_SIZE); | |
1725 | seq_puts(seq, | |
1726 | "Prot LocalAddress:Port Scheduler Flags\n"); | |
1727 | seq_puts(seq, | |
1728 | " -> RemoteAddress:Port Forward Weight ActiveConn InActConn\n"); | |
1729 | } else { | |
1730 | const struct ip_vs_service *svc = v; | |
1731 | const struct ip_vs_iter *iter = seq->private; | |
1732 | const struct ip_vs_dest *dest; | |
1733 | ||
1734 | if (iter->table == ip_vs_svc_table) | |
1735 | seq_printf(seq, "%s %08X:%04X %s ", | |
1736 | ip_vs_proto_name(svc->protocol), | |
1737 | ntohl(svc->addr), | |
1738 | ntohs(svc->port), | |
1739 | svc->scheduler->name); | |
1740 | else | |
1741 | seq_printf(seq, "FWM %08X %s ", | |
1742 | svc->fwmark, svc->scheduler->name); | |
1743 | ||
1744 | if (svc->flags & IP_VS_SVC_F_PERSISTENT) | |
1745 | seq_printf(seq, "persistent %d %08X\n", | |
1746 | svc->timeout, | |
1747 | ntohl(svc->netmask)); | |
1748 | else | |
1749 | seq_putc(seq, '\n'); | |
1750 | ||
1751 | list_for_each_entry(dest, &svc->destinations, n_list) { | |
1752 | seq_printf(seq, | |
1753 | " -> %08X:%04X %-7s %-6d %-10d %-10d\n", | |
1754 | ntohl(dest->addr), ntohs(dest->port), | |
1755 | ip_vs_fwd_name(atomic_read(&dest->conn_flags)), | |
1756 | atomic_read(&dest->weight), | |
1757 | atomic_read(&dest->activeconns), | |
1758 | atomic_read(&dest->inactconns)); | |
1759 | } | |
1760 | } | |
1761 | return 0; | |
1762 | } | |
1763 | ||
56b3d975 | 1764 | static const struct seq_operations ip_vs_info_seq_ops = { |
1da177e4 LT |
1765 | .start = ip_vs_info_seq_start, |
1766 | .next = ip_vs_info_seq_next, | |
1767 | .stop = ip_vs_info_seq_stop, | |
1768 | .show = ip_vs_info_seq_show, | |
1769 | }; | |
1770 | ||
1771 | static int ip_vs_info_open(struct inode *inode, struct file *file) | |
1772 | { | |
cf7732e4 PE |
1773 | return seq_open_private(file, &ip_vs_info_seq_ops, |
1774 | sizeof(struct ip_vs_iter)); | |
1da177e4 LT |
1775 | } |
1776 | ||
9a32144e | 1777 | static const struct file_operations ip_vs_info_fops = { |
1da177e4 LT |
1778 | .owner = THIS_MODULE, |
1779 | .open = ip_vs_info_open, | |
1780 | .read = seq_read, | |
1781 | .llseek = seq_lseek, | |
1782 | .release = seq_release_private, | |
1783 | }; | |
1784 | ||
1785 | #endif | |
1786 | ||
1787 | struct ip_vs_stats ip_vs_stats; | |
1788 | ||
1789 | #ifdef CONFIG_PROC_FS | |
1790 | static int ip_vs_stats_show(struct seq_file *seq, void *v) | |
1791 | { | |
1792 | ||
1793 | /* 01234567 01234567 01234567 0123456701234567 0123456701234567 */ | |
1794 | seq_puts(seq, | |
1795 | " Total Incoming Outgoing Incoming Outgoing\n"); | |
1796 | seq_printf(seq, | |
1797 | " Conns Packets Packets Bytes Bytes\n"); | |
1798 | ||
1799 | spin_lock_bh(&ip_vs_stats.lock); | |
1800 | seq_printf(seq, "%8X %8X %8X %16LX %16LX\n\n", ip_vs_stats.conns, | |
1801 | ip_vs_stats.inpkts, ip_vs_stats.outpkts, | |
1802 | (unsigned long long) ip_vs_stats.inbytes, | |
1803 | (unsigned long long) ip_vs_stats.outbytes); | |
1804 | ||
1805 | /* 01234567 01234567 01234567 0123456701234567 0123456701234567 */ | |
1806 | seq_puts(seq, | |
1807 | " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n"); | |
1808 | seq_printf(seq,"%8X %8X %8X %16X %16X\n", | |
1809 | ip_vs_stats.cps, | |
1810 | ip_vs_stats.inpps, | |
1811 | ip_vs_stats.outpps, | |
1812 | ip_vs_stats.inbps, | |
1813 | ip_vs_stats.outbps); | |
1814 | spin_unlock_bh(&ip_vs_stats.lock); | |
1815 | ||
1816 | return 0; | |
1817 | } | |
1818 | ||
1819 | static int ip_vs_stats_seq_open(struct inode *inode, struct file *file) | |
1820 | { | |
1821 | return single_open(file, ip_vs_stats_show, NULL); | |
1822 | } | |
1823 | ||
9a32144e | 1824 | static const struct file_operations ip_vs_stats_fops = { |
1da177e4 LT |
1825 | .owner = THIS_MODULE, |
1826 | .open = ip_vs_stats_seq_open, | |
1827 | .read = seq_read, | |
1828 | .llseek = seq_lseek, | |
1829 | .release = single_release, | |
1830 | }; | |
1831 | ||
1832 | #endif | |
1833 | ||
1834 | /* | |
1835 | * Set timeout values for tcp tcpfin udp in the timeout_table. | |
1836 | */ | |
1837 | static int ip_vs_set_timeout(struct ip_vs_timeout_user *u) | |
1838 | { | |
1839 | IP_VS_DBG(2, "Setting timeout tcp:%d tcpfin:%d udp:%d\n", | |
1840 | u->tcp_timeout, | |
1841 | u->tcp_fin_timeout, | |
1842 | u->udp_timeout); | |
1843 | ||
1844 | #ifdef CONFIG_IP_VS_PROTO_TCP | |
1845 | if (u->tcp_timeout) { | |
1846 | ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_ESTABLISHED] | |
1847 | = u->tcp_timeout * HZ; | |
1848 | } | |
1849 | ||
1850 | if (u->tcp_fin_timeout) { | |
1851 | ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_FIN_WAIT] | |
1852 | = u->tcp_fin_timeout * HZ; | |
1853 | } | |
1854 | #endif | |
1855 | ||
1856 | #ifdef CONFIG_IP_VS_PROTO_UDP | |
1857 | if (u->udp_timeout) { | |
1858 | ip_vs_protocol_udp.timeout_table[IP_VS_UDP_S_NORMAL] | |
1859 | = u->udp_timeout * HZ; | |
1860 | } | |
1861 | #endif | |
1862 | return 0; | |
1863 | } | |
1864 | ||
1865 | ||
1866 | #define SET_CMDID(cmd) (cmd - IP_VS_BASE_CTL) | |
1867 | #define SERVICE_ARG_LEN (sizeof(struct ip_vs_service_user)) | |
1868 | #define SVCDEST_ARG_LEN (sizeof(struct ip_vs_service_user) + \ | |
1869 | sizeof(struct ip_vs_dest_user)) | |
1870 | #define TIMEOUT_ARG_LEN (sizeof(struct ip_vs_timeout_user)) | |
1871 | #define DAEMON_ARG_LEN (sizeof(struct ip_vs_daemon_user)) | |
1872 | #define MAX_ARG_LEN SVCDEST_ARG_LEN | |
1873 | ||
9b5b5cff | 1874 | static const unsigned char set_arglen[SET_CMDID(IP_VS_SO_SET_MAX)+1] = { |
1da177e4 LT |
1875 | [SET_CMDID(IP_VS_SO_SET_ADD)] = SERVICE_ARG_LEN, |
1876 | [SET_CMDID(IP_VS_SO_SET_EDIT)] = SERVICE_ARG_LEN, | |
1877 | [SET_CMDID(IP_VS_SO_SET_DEL)] = SERVICE_ARG_LEN, | |
1878 | [SET_CMDID(IP_VS_SO_SET_FLUSH)] = 0, | |
1879 | [SET_CMDID(IP_VS_SO_SET_ADDDEST)] = SVCDEST_ARG_LEN, | |
1880 | [SET_CMDID(IP_VS_SO_SET_DELDEST)] = SVCDEST_ARG_LEN, | |
1881 | [SET_CMDID(IP_VS_SO_SET_EDITDEST)] = SVCDEST_ARG_LEN, | |
1882 | [SET_CMDID(IP_VS_SO_SET_TIMEOUT)] = TIMEOUT_ARG_LEN, | |
1883 | [SET_CMDID(IP_VS_SO_SET_STARTDAEMON)] = DAEMON_ARG_LEN, | |
1884 | [SET_CMDID(IP_VS_SO_SET_STOPDAEMON)] = DAEMON_ARG_LEN, | |
1885 | [SET_CMDID(IP_VS_SO_SET_ZERO)] = SERVICE_ARG_LEN, | |
1886 | }; | |
1887 | ||
1888 | static int | |
1889 | do_ip_vs_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len) | |
1890 | { | |
1891 | int ret; | |
1892 | unsigned char arg[MAX_ARG_LEN]; | |
1893 | struct ip_vs_service_user *usvc; | |
1894 | struct ip_vs_service *svc; | |
1895 | struct ip_vs_dest_user *udest; | |
1896 | ||
1897 | if (!capable(CAP_NET_ADMIN)) | |
1898 | return -EPERM; | |
1899 | ||
1900 | if (len != set_arglen[SET_CMDID(cmd)]) { | |
1901 | IP_VS_ERR("set_ctl: len %u != %u\n", | |
1902 | len, set_arglen[SET_CMDID(cmd)]); | |
1903 | return -EINVAL; | |
1904 | } | |
1905 | ||
1906 | if (copy_from_user(arg, user, len) != 0) | |
1907 | return -EFAULT; | |
1908 | ||
1909 | /* increase the module use count */ | |
1910 | ip_vs_use_count_inc(); | |
1911 | ||
14cc3e2b | 1912 | if (mutex_lock_interruptible(&__ip_vs_mutex)) { |
1da177e4 LT |
1913 | ret = -ERESTARTSYS; |
1914 | goto out_dec; | |
1915 | } | |
1916 | ||
1917 | if (cmd == IP_VS_SO_SET_FLUSH) { | |
1918 | /* Flush the virtual service */ | |
1919 | ret = ip_vs_flush(); | |
1920 | goto out_unlock; | |
1921 | } else if (cmd == IP_VS_SO_SET_TIMEOUT) { | |
1922 | /* Set timeout values for (tcp tcpfin udp) */ | |
1923 | ret = ip_vs_set_timeout((struct ip_vs_timeout_user *)arg); | |
1924 | goto out_unlock; | |
1925 | } else if (cmd == IP_VS_SO_SET_STARTDAEMON) { | |
1926 | struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg; | |
1927 | ret = start_sync_thread(dm->state, dm->mcast_ifn, dm->syncid); | |
1928 | goto out_unlock; | |
1929 | } else if (cmd == IP_VS_SO_SET_STOPDAEMON) { | |
1930 | struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg; | |
1931 | ret = stop_sync_thread(dm->state); | |
1932 | goto out_unlock; | |
1933 | } | |
1934 | ||
1935 | usvc = (struct ip_vs_service_user *)arg; | |
1936 | udest = (struct ip_vs_dest_user *)(usvc + 1); | |
1937 | ||
1938 | if (cmd == IP_VS_SO_SET_ZERO) { | |
1939 | /* if no service address is set, zero counters in all */ | |
1940 | if (!usvc->fwmark && !usvc->addr && !usvc->port) { | |
1941 | ret = ip_vs_zero_all(); | |
1942 | goto out_unlock; | |
1943 | } | |
1944 | } | |
1945 | ||
1946 | /* Check for valid protocol: TCP or UDP, even for fwmark!=0 */ | |
1947 | if (usvc->protocol!=IPPROTO_TCP && usvc->protocol!=IPPROTO_UDP) { | |
1948 | IP_VS_ERR("set_ctl: invalid protocol: %d %d.%d.%d.%d:%d %s\n", | |
1949 | usvc->protocol, NIPQUAD(usvc->addr), | |
1950 | ntohs(usvc->port), usvc->sched_name); | |
1951 | ret = -EFAULT; | |
1952 | goto out_unlock; | |
1953 | } | |
1954 | ||
1955 | /* Lookup the exact service by <protocol, addr, port> or fwmark */ | |
1956 | if (usvc->fwmark == 0) | |
1957 | svc = __ip_vs_service_get(usvc->protocol, | |
1958 | usvc->addr, usvc->port); | |
1959 | else | |
1960 | svc = __ip_vs_svc_fwm_get(usvc->fwmark); | |
1961 | ||
1962 | if (cmd != IP_VS_SO_SET_ADD | |
1963 | && (svc == NULL || svc->protocol != usvc->protocol)) { | |
1964 | ret = -ESRCH; | |
1965 | goto out_unlock; | |
1966 | } | |
1967 | ||
1968 | switch (cmd) { | |
1969 | case IP_VS_SO_SET_ADD: | |
1970 | if (svc != NULL) | |
1971 | ret = -EEXIST; | |
1972 | else | |
1973 | ret = ip_vs_add_service(usvc, &svc); | |
1974 | break; | |
1975 | case IP_VS_SO_SET_EDIT: | |
1976 | ret = ip_vs_edit_service(svc, usvc); | |
1977 | break; | |
1978 | case IP_VS_SO_SET_DEL: | |
1979 | ret = ip_vs_del_service(svc); | |
1980 | if (!ret) | |
1981 | goto out_unlock; | |
1982 | break; | |
1983 | case IP_VS_SO_SET_ZERO: | |
1984 | ret = ip_vs_zero_service(svc); | |
1985 | break; | |
1986 | case IP_VS_SO_SET_ADDDEST: | |
1987 | ret = ip_vs_add_dest(svc, udest); | |
1988 | break; | |
1989 | case IP_VS_SO_SET_EDITDEST: | |
1990 | ret = ip_vs_edit_dest(svc, udest); | |
1991 | break; | |
1992 | case IP_VS_SO_SET_DELDEST: | |
1993 | ret = ip_vs_del_dest(svc, udest); | |
1994 | break; | |
1995 | default: | |
1996 | ret = -EINVAL; | |
1997 | } | |
1998 | ||
1999 | if (svc) | |
2000 | ip_vs_service_put(svc); | |
2001 | ||
2002 | out_unlock: | |
14cc3e2b | 2003 | mutex_unlock(&__ip_vs_mutex); |
1da177e4 LT |
2004 | out_dec: |
2005 | /* decrease the module use count */ | |
2006 | ip_vs_use_count_dec(); | |
2007 | ||
2008 | return ret; | |
2009 | } | |
2010 | ||
2011 | ||
2012 | static void | |
2013 | ip_vs_copy_stats(struct ip_vs_stats_user *dst, struct ip_vs_stats *src) | |
2014 | { | |
2015 | spin_lock_bh(&src->lock); | |
2016 | memcpy(dst, src, (char*)&src->lock - (char*)src); | |
2017 | spin_unlock_bh(&src->lock); | |
2018 | } | |
2019 | ||
2020 | static void | |
2021 | ip_vs_copy_service(struct ip_vs_service_entry *dst, struct ip_vs_service *src) | |
2022 | { | |
2023 | dst->protocol = src->protocol; | |
2024 | dst->addr = src->addr; | |
2025 | dst->port = src->port; | |
2026 | dst->fwmark = src->fwmark; | |
4da62fc7 | 2027 | strlcpy(dst->sched_name, src->scheduler->name, sizeof(dst->sched_name)); |
1da177e4 LT |
2028 | dst->flags = src->flags; |
2029 | dst->timeout = src->timeout / HZ; | |
2030 | dst->netmask = src->netmask; | |
2031 | dst->num_dests = src->num_dests; | |
2032 | ip_vs_copy_stats(&dst->stats, &src->stats); | |
2033 | } | |
2034 | ||
2035 | static inline int | |
2036 | __ip_vs_get_service_entries(const struct ip_vs_get_services *get, | |
2037 | struct ip_vs_get_services __user *uptr) | |
2038 | { | |
2039 | int idx, count=0; | |
2040 | struct ip_vs_service *svc; | |
2041 | struct ip_vs_service_entry entry; | |
2042 | int ret = 0; | |
2043 | ||
2044 | for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
2045 | list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) { | |
2046 | if (count >= get->num_services) | |
2047 | goto out; | |
4da62fc7 | 2048 | memset(&entry, 0, sizeof(entry)); |
1da177e4 LT |
2049 | ip_vs_copy_service(&entry, svc); |
2050 | if (copy_to_user(&uptr->entrytable[count], | |
2051 | &entry, sizeof(entry))) { | |
2052 | ret = -EFAULT; | |
2053 | goto out; | |
2054 | } | |
2055 | count++; | |
2056 | } | |
2057 | } | |
2058 | ||
2059 | for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
2060 | list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) { | |
2061 | if (count >= get->num_services) | |
2062 | goto out; | |
4da62fc7 | 2063 | memset(&entry, 0, sizeof(entry)); |
1da177e4 LT |
2064 | ip_vs_copy_service(&entry, svc); |
2065 | if (copy_to_user(&uptr->entrytable[count], | |
2066 | &entry, sizeof(entry))) { | |
2067 | ret = -EFAULT; | |
2068 | goto out; | |
2069 | } | |
2070 | count++; | |
2071 | } | |
2072 | } | |
2073 | out: | |
2074 | return ret; | |
2075 | } | |
2076 | ||
2077 | static inline int | |
2078 | __ip_vs_get_dest_entries(const struct ip_vs_get_dests *get, | |
2079 | struct ip_vs_get_dests __user *uptr) | |
2080 | { | |
2081 | struct ip_vs_service *svc; | |
2082 | int ret = 0; | |
2083 | ||
2084 | if (get->fwmark) | |
2085 | svc = __ip_vs_svc_fwm_get(get->fwmark); | |
2086 | else | |
2087 | svc = __ip_vs_service_get(get->protocol, | |
2088 | get->addr, get->port); | |
2089 | if (svc) { | |
2090 | int count = 0; | |
2091 | struct ip_vs_dest *dest; | |
2092 | struct ip_vs_dest_entry entry; | |
2093 | ||
2094 | list_for_each_entry(dest, &svc->destinations, n_list) { | |
2095 | if (count >= get->num_dests) | |
2096 | break; | |
2097 | ||
2098 | entry.addr = dest->addr; | |
2099 | entry.port = dest->port; | |
2100 | entry.conn_flags = atomic_read(&dest->conn_flags); | |
2101 | entry.weight = atomic_read(&dest->weight); | |
2102 | entry.u_threshold = dest->u_threshold; | |
2103 | entry.l_threshold = dest->l_threshold; | |
2104 | entry.activeconns = atomic_read(&dest->activeconns); | |
2105 | entry.inactconns = atomic_read(&dest->inactconns); | |
2106 | entry.persistconns = atomic_read(&dest->persistconns); | |
2107 | ip_vs_copy_stats(&entry.stats, &dest->stats); | |
2108 | if (copy_to_user(&uptr->entrytable[count], | |
2109 | &entry, sizeof(entry))) { | |
2110 | ret = -EFAULT; | |
2111 | break; | |
2112 | } | |
2113 | count++; | |
2114 | } | |
2115 | ip_vs_service_put(svc); | |
2116 | } else | |
2117 | ret = -ESRCH; | |
2118 | return ret; | |
2119 | } | |
2120 | ||
2121 | static inline void | |
2122 | __ip_vs_get_timeouts(struct ip_vs_timeout_user *u) | |
2123 | { | |
2124 | #ifdef CONFIG_IP_VS_PROTO_TCP | |
2125 | u->tcp_timeout = | |
2126 | ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_ESTABLISHED] / HZ; | |
2127 | u->tcp_fin_timeout = | |
2128 | ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_FIN_WAIT] / HZ; | |
2129 | #endif | |
2130 | #ifdef CONFIG_IP_VS_PROTO_UDP | |
2131 | u->udp_timeout = | |
2132 | ip_vs_protocol_udp.timeout_table[IP_VS_UDP_S_NORMAL] / HZ; | |
2133 | #endif | |
2134 | } | |
2135 | ||
2136 | ||
2137 | #define GET_CMDID(cmd) (cmd - IP_VS_BASE_CTL) | |
2138 | #define GET_INFO_ARG_LEN (sizeof(struct ip_vs_getinfo)) | |
2139 | #define GET_SERVICES_ARG_LEN (sizeof(struct ip_vs_get_services)) | |
2140 | #define GET_SERVICE_ARG_LEN (sizeof(struct ip_vs_service_entry)) | |
2141 | #define GET_DESTS_ARG_LEN (sizeof(struct ip_vs_get_dests)) | |
2142 | #define GET_TIMEOUT_ARG_LEN (sizeof(struct ip_vs_timeout_user)) | |
2143 | #define GET_DAEMON_ARG_LEN (sizeof(struct ip_vs_daemon_user) * 2) | |
2144 | ||
9b5b5cff | 2145 | static const unsigned char get_arglen[GET_CMDID(IP_VS_SO_GET_MAX)+1] = { |
1da177e4 LT |
2146 | [GET_CMDID(IP_VS_SO_GET_VERSION)] = 64, |
2147 | [GET_CMDID(IP_VS_SO_GET_INFO)] = GET_INFO_ARG_LEN, | |
2148 | [GET_CMDID(IP_VS_SO_GET_SERVICES)] = GET_SERVICES_ARG_LEN, | |
2149 | [GET_CMDID(IP_VS_SO_GET_SERVICE)] = GET_SERVICE_ARG_LEN, | |
2150 | [GET_CMDID(IP_VS_SO_GET_DESTS)] = GET_DESTS_ARG_LEN, | |
2151 | [GET_CMDID(IP_VS_SO_GET_TIMEOUT)] = GET_TIMEOUT_ARG_LEN, | |
2152 | [GET_CMDID(IP_VS_SO_GET_DAEMON)] = GET_DAEMON_ARG_LEN, | |
2153 | }; | |
2154 | ||
2155 | static int | |
2156 | do_ip_vs_get_ctl(struct sock *sk, int cmd, void __user *user, int *len) | |
2157 | { | |
2158 | unsigned char arg[128]; | |
2159 | int ret = 0; | |
2160 | ||
2161 | if (!capable(CAP_NET_ADMIN)) | |
2162 | return -EPERM; | |
2163 | ||
2164 | if (*len < get_arglen[GET_CMDID(cmd)]) { | |
2165 | IP_VS_ERR("get_ctl: len %u < %u\n", | |
2166 | *len, get_arglen[GET_CMDID(cmd)]); | |
2167 | return -EINVAL; | |
2168 | } | |
2169 | ||
2170 | if (copy_from_user(arg, user, get_arglen[GET_CMDID(cmd)]) != 0) | |
2171 | return -EFAULT; | |
2172 | ||
14cc3e2b | 2173 | if (mutex_lock_interruptible(&__ip_vs_mutex)) |
1da177e4 LT |
2174 | return -ERESTARTSYS; |
2175 | ||
2176 | switch (cmd) { | |
2177 | case IP_VS_SO_GET_VERSION: | |
2178 | { | |
2179 | char buf[64]; | |
2180 | ||
2181 | sprintf(buf, "IP Virtual Server version %d.%d.%d (size=%d)", | |
2182 | NVERSION(IP_VS_VERSION_CODE), IP_VS_CONN_TAB_SIZE); | |
2183 | if (copy_to_user(user, buf, strlen(buf)+1) != 0) { | |
2184 | ret = -EFAULT; | |
2185 | goto out; | |
2186 | } | |
2187 | *len = strlen(buf)+1; | |
2188 | } | |
2189 | break; | |
2190 | ||
2191 | case IP_VS_SO_GET_INFO: | |
2192 | { | |
2193 | struct ip_vs_getinfo info; | |
2194 | info.version = IP_VS_VERSION_CODE; | |
2195 | info.size = IP_VS_CONN_TAB_SIZE; | |
2196 | info.num_services = ip_vs_num_services; | |
2197 | if (copy_to_user(user, &info, sizeof(info)) != 0) | |
2198 | ret = -EFAULT; | |
2199 | } | |
2200 | break; | |
2201 | ||
2202 | case IP_VS_SO_GET_SERVICES: | |
2203 | { | |
2204 | struct ip_vs_get_services *get; | |
2205 | int size; | |
2206 | ||
2207 | get = (struct ip_vs_get_services *)arg; | |
2208 | size = sizeof(*get) + | |
2209 | sizeof(struct ip_vs_service_entry) * get->num_services; | |
2210 | if (*len != size) { | |
2211 | IP_VS_ERR("length: %u != %u\n", *len, size); | |
2212 | ret = -EINVAL; | |
2213 | goto out; | |
2214 | } | |
2215 | ret = __ip_vs_get_service_entries(get, user); | |
2216 | } | |
2217 | break; | |
2218 | ||
2219 | case IP_VS_SO_GET_SERVICE: | |
2220 | { | |
2221 | struct ip_vs_service_entry *entry; | |
2222 | struct ip_vs_service *svc; | |
2223 | ||
2224 | entry = (struct ip_vs_service_entry *)arg; | |
2225 | if (entry->fwmark) | |
2226 | svc = __ip_vs_svc_fwm_get(entry->fwmark); | |
2227 | else | |
2228 | svc = __ip_vs_service_get(entry->protocol, | |
2229 | entry->addr, entry->port); | |
2230 | if (svc) { | |
2231 | ip_vs_copy_service(entry, svc); | |
2232 | if (copy_to_user(user, entry, sizeof(*entry)) != 0) | |
2233 | ret = -EFAULT; | |
2234 | ip_vs_service_put(svc); | |
2235 | } else | |
2236 | ret = -ESRCH; | |
2237 | } | |
2238 | break; | |
2239 | ||
2240 | case IP_VS_SO_GET_DESTS: | |
2241 | { | |
2242 | struct ip_vs_get_dests *get; | |
2243 | int size; | |
2244 | ||
2245 | get = (struct ip_vs_get_dests *)arg; | |
2246 | size = sizeof(*get) + | |
2247 | sizeof(struct ip_vs_dest_entry) * get->num_dests; | |
2248 | if (*len != size) { | |
2249 | IP_VS_ERR("length: %u != %u\n", *len, size); | |
2250 | ret = -EINVAL; | |
2251 | goto out; | |
2252 | } | |
2253 | ret = __ip_vs_get_dest_entries(get, user); | |
2254 | } | |
2255 | break; | |
2256 | ||
2257 | case IP_VS_SO_GET_TIMEOUT: | |
2258 | { | |
2259 | struct ip_vs_timeout_user t; | |
2260 | ||
2261 | __ip_vs_get_timeouts(&t); | |
2262 | if (copy_to_user(user, &t, sizeof(t)) != 0) | |
2263 | ret = -EFAULT; | |
2264 | } | |
2265 | break; | |
2266 | ||
2267 | case IP_VS_SO_GET_DAEMON: | |
2268 | { | |
2269 | struct ip_vs_daemon_user d[2]; | |
2270 | ||
2271 | memset(&d, 0, sizeof(d)); | |
2272 | if (ip_vs_sync_state & IP_VS_STATE_MASTER) { | |
2273 | d[0].state = IP_VS_STATE_MASTER; | |
4da62fc7 | 2274 | strlcpy(d[0].mcast_ifn, ip_vs_master_mcast_ifn, sizeof(d[0].mcast_ifn)); |
1da177e4 LT |
2275 | d[0].syncid = ip_vs_master_syncid; |
2276 | } | |
2277 | if (ip_vs_sync_state & IP_VS_STATE_BACKUP) { | |
2278 | d[1].state = IP_VS_STATE_BACKUP; | |
4da62fc7 | 2279 | strlcpy(d[1].mcast_ifn, ip_vs_backup_mcast_ifn, sizeof(d[1].mcast_ifn)); |
1da177e4 LT |
2280 | d[1].syncid = ip_vs_backup_syncid; |
2281 | } | |
2282 | if (copy_to_user(user, &d, sizeof(d)) != 0) | |
2283 | ret = -EFAULT; | |
2284 | } | |
2285 | break; | |
2286 | ||
2287 | default: | |
2288 | ret = -EINVAL; | |
2289 | } | |
2290 | ||
2291 | out: | |
14cc3e2b | 2292 | mutex_unlock(&__ip_vs_mutex); |
1da177e4 LT |
2293 | return ret; |
2294 | } | |
2295 | ||
2296 | ||
2297 | static struct nf_sockopt_ops ip_vs_sockopts = { | |
2298 | .pf = PF_INET, | |
2299 | .set_optmin = IP_VS_BASE_CTL, | |
2300 | .set_optmax = IP_VS_SO_SET_MAX+1, | |
2301 | .set = do_ip_vs_set_ctl, | |
2302 | .get_optmin = IP_VS_BASE_CTL, | |
2303 | .get_optmax = IP_VS_SO_GET_MAX+1, | |
2304 | .get = do_ip_vs_get_ctl, | |
16fcec35 | 2305 | .owner = THIS_MODULE, |
1da177e4 LT |
2306 | }; |
2307 | ||
2308 | ||
2309 | int ip_vs_control_init(void) | |
2310 | { | |
2311 | int ret; | |
2312 | int idx; | |
2313 | ||
2314 | EnterFunction(2); | |
2315 | ||
2316 | ret = nf_register_sockopt(&ip_vs_sockopts); | |
2317 | if (ret) { | |
2318 | IP_VS_ERR("cannot register sockopt.\n"); | |
2319 | return ret; | |
2320 | } | |
2321 | ||
457c4cbc EB |
2322 | proc_net_fops_create(&init_net, "ip_vs", 0, &ip_vs_info_fops); |
2323 | proc_net_fops_create(&init_net, "ip_vs_stats",0, &ip_vs_stats_fops); | |
1da177e4 | 2324 | |
90754f8e | 2325 | sysctl_header = register_sysctl_paths(net_vs_ctl_path, vs_vars); |
1da177e4 LT |
2326 | |
2327 | /* Initialize ip_vs_svc_table, ip_vs_svc_fwm_table, ip_vs_rtable */ | |
2328 | for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
2329 | INIT_LIST_HEAD(&ip_vs_svc_table[idx]); | |
2330 | INIT_LIST_HEAD(&ip_vs_svc_fwm_table[idx]); | |
2331 | } | |
2332 | for(idx = 0; idx < IP_VS_RTAB_SIZE; idx++) { | |
2333 | INIT_LIST_HEAD(&ip_vs_rtable[idx]); | |
2334 | } | |
2335 | ||
2336 | memset(&ip_vs_stats, 0, sizeof(ip_vs_stats)); | |
2337 | spin_lock_init(&ip_vs_stats.lock); | |
2338 | ip_vs_new_estimator(&ip_vs_stats); | |
2339 | ||
2340 | /* Hook the defense timer */ | |
2341 | schedule_delayed_work(&defense_work, DEFENSE_TIMER_PERIOD); | |
2342 | ||
2343 | LeaveFunction(2); | |
2344 | return 0; | |
2345 | } | |
2346 | ||
2347 | ||
2348 | void ip_vs_control_cleanup(void) | |
2349 | { | |
2350 | EnterFunction(2); | |
2351 | ip_vs_trash_cleanup(); | |
2352 | cancel_rearming_delayed_work(&defense_work); | |
28e53bdd | 2353 | cancel_work_sync(&defense_work.work); |
1da177e4 LT |
2354 | ip_vs_kill_estimator(&ip_vs_stats); |
2355 | unregister_sysctl_table(sysctl_header); | |
457c4cbc EB |
2356 | proc_net_remove(&init_net, "ip_vs_stats"); |
2357 | proc_net_remove(&init_net, "ip_vs"); | |
1da177e4 LT |
2358 | nf_unregister_sockopt(&ip_vs_sockopts); |
2359 | LeaveFunction(2); | |
2360 | } |