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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 | * | |
8 | * Version: $Id: ip_vs_ctl.c,v 1.36 2003/06/08 09:31:19 wensong Exp $ | |
9 | * | |
10 | * Authors: Wensong Zhang <wensong@linuxvirtualserver.org> | |
11 | * Peter Kese <peter.kese@ijs.si> | |
12 | * Julian Anastasov <ja@ssi.bg> | |
13 | * | |
14 | * This program is free software; you can redistribute it and/or | |
15 | * modify it under the terms of the GNU General Public License | |
16 | * as published by the Free Software Foundation; either version | |
17 | * 2 of the License, or (at your option) any later version. | |
18 | * | |
19 | * Changes: | |
20 | * | |
21 | */ | |
22 | ||
23 | #include <linux/module.h> | |
24 | #include <linux/init.h> | |
25 | #include <linux/types.h> | |
26 | #include <linux/fs.h> | |
27 | #include <linux/sysctl.h> | |
28 | #include <linux/proc_fs.h> | |
29 | #include <linux/workqueue.h> | |
30 | #include <linux/swap.h> | |
31 | #include <linux/proc_fs.h> | |
32 | #include <linux/seq_file.h> | |
33 | ||
34 | #include <linux/netfilter.h> | |
35 | #include <linux/netfilter_ipv4.h> | |
36 | ||
37 | #include <net/ip.h> | |
38 | #include <net/sock.h> | |
39 | ||
40 | #include <asm/uaccess.h> | |
41 | ||
42 | #include <net/ip_vs.h> | |
43 | ||
44 | /* semaphore for IPVS sockopts. And, [gs]etsockopt may sleep. */ | |
45 | static DECLARE_MUTEX(__ip_vs_mutex); | |
46 | ||
47 | /* lock for service table */ | |
48 | static DEFINE_RWLOCK(__ip_vs_svc_lock); | |
49 | ||
50 | /* lock for table with the real services */ | |
51 | static DEFINE_RWLOCK(__ip_vs_rs_lock); | |
52 | ||
53 | /* lock for state and timeout tables */ | |
54 | static DEFINE_RWLOCK(__ip_vs_securetcp_lock); | |
55 | ||
56 | /* lock for drop entry handling */ | |
57 | static DEFINE_SPINLOCK(__ip_vs_dropentry_lock); | |
58 | ||
59 | /* lock for drop packet handling */ | |
60 | static DEFINE_SPINLOCK(__ip_vs_droppacket_lock); | |
61 | ||
62 | /* 1/rate drop and drop-entry variables */ | |
63 | int ip_vs_drop_rate = 0; | |
64 | int ip_vs_drop_counter = 0; | |
65 | static atomic_t ip_vs_dropentry = ATOMIC_INIT(0); | |
66 | ||
67 | /* number of virtual services */ | |
68 | static int ip_vs_num_services = 0; | |
69 | ||
70 | /* sysctl variables */ | |
71 | static int sysctl_ip_vs_drop_entry = 0; | |
72 | static int sysctl_ip_vs_drop_packet = 0; | |
73 | static int sysctl_ip_vs_secure_tcp = 0; | |
74 | static int sysctl_ip_vs_amemthresh = 1024; | |
75 | static int sysctl_ip_vs_am_droprate = 10; | |
76 | int sysctl_ip_vs_cache_bypass = 0; | |
77 | int sysctl_ip_vs_expire_nodest_conn = 0; | |
78 | int sysctl_ip_vs_expire_quiescent_template = 0; | |
79 | int sysctl_ip_vs_sync_threshold[2] = { 3, 50 }; | |
80 | int sysctl_ip_vs_nat_icmp_send = 0; | |
81 | ||
82 | ||
83 | #ifdef CONFIG_IP_VS_DEBUG | |
84 | static int sysctl_ip_vs_debug_level = 0; | |
85 | ||
86 | int ip_vs_get_debug_level(void) | |
87 | { | |
88 | return sysctl_ip_vs_debug_level; | |
89 | } | |
90 | #endif | |
91 | ||
92 | /* | |
93 | * update_defense_level is called from keventd and from sysctl. | |
94 | */ | |
95 | static void update_defense_level(void) | |
96 | { | |
97 | struct sysinfo i; | |
98 | static int old_secure_tcp = 0; | |
99 | int availmem; | |
100 | int nomem; | |
101 | int to_change = -1; | |
102 | ||
103 | /* we only count free and buffered memory (in pages) */ | |
104 | si_meminfo(&i); | |
105 | availmem = i.freeram + i.bufferram; | |
106 | /* however in linux 2.5 the i.bufferram is total page cache size, | |
107 | we need adjust it */ | |
108 | /* si_swapinfo(&i); */ | |
109 | /* availmem = availmem - (i.totalswap - i.freeswap); */ | |
110 | ||
111 | nomem = (availmem < sysctl_ip_vs_amemthresh); | |
112 | ||
113 | /* drop_entry */ | |
114 | spin_lock(&__ip_vs_dropentry_lock); | |
115 | switch (sysctl_ip_vs_drop_entry) { | |
116 | case 0: | |
117 | atomic_set(&ip_vs_dropentry, 0); | |
118 | break; | |
119 | case 1: | |
120 | if (nomem) { | |
121 | atomic_set(&ip_vs_dropentry, 1); | |
122 | sysctl_ip_vs_drop_entry = 2; | |
123 | } else { | |
124 | atomic_set(&ip_vs_dropentry, 0); | |
125 | } | |
126 | break; | |
127 | case 2: | |
128 | if (nomem) { | |
129 | atomic_set(&ip_vs_dropentry, 1); | |
130 | } else { | |
131 | atomic_set(&ip_vs_dropentry, 0); | |
132 | sysctl_ip_vs_drop_entry = 1; | |
133 | }; | |
134 | break; | |
135 | case 3: | |
136 | atomic_set(&ip_vs_dropentry, 1); | |
137 | break; | |
138 | } | |
139 | spin_unlock(&__ip_vs_dropentry_lock); | |
140 | ||
141 | /* drop_packet */ | |
142 | spin_lock(&__ip_vs_droppacket_lock); | |
143 | switch (sysctl_ip_vs_drop_packet) { | |
144 | case 0: | |
145 | ip_vs_drop_rate = 0; | |
146 | break; | |
147 | case 1: | |
148 | if (nomem) { | |
149 | ip_vs_drop_rate = ip_vs_drop_counter | |
150 | = sysctl_ip_vs_amemthresh / | |
151 | (sysctl_ip_vs_amemthresh-availmem); | |
152 | sysctl_ip_vs_drop_packet = 2; | |
153 | } else { | |
154 | ip_vs_drop_rate = 0; | |
155 | } | |
156 | break; | |
157 | case 2: | |
158 | if (nomem) { | |
159 | ip_vs_drop_rate = ip_vs_drop_counter | |
160 | = sysctl_ip_vs_amemthresh / | |
161 | (sysctl_ip_vs_amemthresh-availmem); | |
162 | } else { | |
163 | ip_vs_drop_rate = 0; | |
164 | sysctl_ip_vs_drop_packet = 1; | |
165 | } | |
166 | break; | |
167 | case 3: | |
168 | ip_vs_drop_rate = sysctl_ip_vs_am_droprate; | |
169 | break; | |
170 | } | |
171 | spin_unlock(&__ip_vs_droppacket_lock); | |
172 | ||
173 | /* secure_tcp */ | |
174 | write_lock(&__ip_vs_securetcp_lock); | |
175 | switch (sysctl_ip_vs_secure_tcp) { | |
176 | case 0: | |
177 | if (old_secure_tcp >= 2) | |
178 | to_change = 0; | |
179 | break; | |
180 | case 1: | |
181 | if (nomem) { | |
182 | if (old_secure_tcp < 2) | |
183 | to_change = 1; | |
184 | sysctl_ip_vs_secure_tcp = 2; | |
185 | } else { | |
186 | if (old_secure_tcp >= 2) | |
187 | to_change = 0; | |
188 | } | |
189 | break; | |
190 | case 2: | |
191 | if (nomem) { | |
192 | if (old_secure_tcp < 2) | |
193 | to_change = 1; | |
194 | } else { | |
195 | if (old_secure_tcp >= 2) | |
196 | to_change = 0; | |
197 | sysctl_ip_vs_secure_tcp = 1; | |
198 | } | |
199 | break; | |
200 | case 3: | |
201 | if (old_secure_tcp < 2) | |
202 | to_change = 1; | |
203 | break; | |
204 | } | |
205 | old_secure_tcp = sysctl_ip_vs_secure_tcp; | |
206 | if (to_change >= 0) | |
207 | ip_vs_protocol_timeout_change(sysctl_ip_vs_secure_tcp>1); | |
208 | write_unlock(&__ip_vs_securetcp_lock); | |
209 | } | |
210 | ||
211 | ||
212 | /* | |
213 | * Timer for checking the defense | |
214 | */ | |
215 | #define DEFENSE_TIMER_PERIOD 1*HZ | |
216 | static void defense_work_handler(void *data); | |
217 | static DECLARE_WORK(defense_work, defense_work_handler, NULL); | |
218 | ||
219 | static void defense_work_handler(void *data) | |
220 | { | |
221 | update_defense_level(); | |
222 | if (atomic_read(&ip_vs_dropentry)) | |
223 | ip_vs_random_dropentry(); | |
224 | ||
225 | schedule_delayed_work(&defense_work, DEFENSE_TIMER_PERIOD); | |
226 | } | |
227 | ||
228 | int | |
229 | ip_vs_use_count_inc(void) | |
230 | { | |
231 | return try_module_get(THIS_MODULE); | |
232 | } | |
233 | ||
234 | void | |
235 | ip_vs_use_count_dec(void) | |
236 | { | |
237 | module_put(THIS_MODULE); | |
238 | } | |
239 | ||
240 | ||
241 | /* | |
242 | * Hash table: for virtual service lookups | |
243 | */ | |
244 | #define IP_VS_SVC_TAB_BITS 8 | |
245 | #define IP_VS_SVC_TAB_SIZE (1 << IP_VS_SVC_TAB_BITS) | |
246 | #define IP_VS_SVC_TAB_MASK (IP_VS_SVC_TAB_SIZE - 1) | |
247 | ||
248 | /* the service table hashed by <protocol, addr, port> */ | |
249 | static struct list_head ip_vs_svc_table[IP_VS_SVC_TAB_SIZE]; | |
250 | /* the service table hashed by fwmark */ | |
251 | static struct list_head ip_vs_svc_fwm_table[IP_VS_SVC_TAB_SIZE]; | |
252 | ||
253 | /* | |
254 | * Hash table: for real service lookups | |
255 | */ | |
256 | #define IP_VS_RTAB_BITS 4 | |
257 | #define IP_VS_RTAB_SIZE (1 << IP_VS_RTAB_BITS) | |
258 | #define IP_VS_RTAB_MASK (IP_VS_RTAB_SIZE - 1) | |
259 | ||
260 | static struct list_head ip_vs_rtable[IP_VS_RTAB_SIZE]; | |
261 | ||
262 | /* | |
263 | * Trash for destinations | |
264 | */ | |
265 | static LIST_HEAD(ip_vs_dest_trash); | |
266 | ||
267 | /* | |
268 | * FTP & NULL virtual service counters | |
269 | */ | |
270 | static atomic_t ip_vs_ftpsvc_counter = ATOMIC_INIT(0); | |
271 | static atomic_t ip_vs_nullsvc_counter = ATOMIC_INIT(0); | |
272 | ||
273 | ||
274 | /* | |
275 | * Returns hash value for virtual service | |
276 | */ | |
277 | static __inline__ unsigned | |
278 | ip_vs_svc_hashkey(unsigned proto, __u32 addr, __u16 port) | |
279 | { | |
280 | register unsigned porth = ntohs(port); | |
281 | ||
282 | return (proto^ntohl(addr)^(porth>>IP_VS_SVC_TAB_BITS)^porth) | |
283 | & IP_VS_SVC_TAB_MASK; | |
284 | } | |
285 | ||
286 | /* | |
287 | * Returns hash value of fwmark for virtual service lookup | |
288 | */ | |
289 | static __inline__ unsigned ip_vs_svc_fwm_hashkey(__u32 fwmark) | |
290 | { | |
291 | return fwmark & IP_VS_SVC_TAB_MASK; | |
292 | } | |
293 | ||
294 | /* | |
295 | * Hashes a service in the ip_vs_svc_table by <proto,addr,port> | |
296 | * or in the ip_vs_svc_fwm_table by fwmark. | |
297 | * Should be called with locked tables. | |
298 | */ | |
299 | static int ip_vs_svc_hash(struct ip_vs_service *svc) | |
300 | { | |
301 | unsigned hash; | |
302 | ||
303 | if (svc->flags & IP_VS_SVC_F_HASHED) { | |
304 | IP_VS_ERR("ip_vs_svc_hash(): request for already hashed, " | |
305 | "called from %p\n", __builtin_return_address(0)); | |
306 | return 0; | |
307 | } | |
308 | ||
309 | if (svc->fwmark == 0) { | |
310 | /* | |
311 | * Hash it by <protocol,addr,port> in ip_vs_svc_table | |
312 | */ | |
313 | hash = ip_vs_svc_hashkey(svc->protocol, svc->addr, svc->port); | |
314 | list_add(&svc->s_list, &ip_vs_svc_table[hash]); | |
315 | } else { | |
316 | /* | |
317 | * Hash it by fwmark in ip_vs_svc_fwm_table | |
318 | */ | |
319 | hash = ip_vs_svc_fwm_hashkey(svc->fwmark); | |
320 | list_add(&svc->f_list, &ip_vs_svc_fwm_table[hash]); | |
321 | } | |
322 | ||
323 | svc->flags |= IP_VS_SVC_F_HASHED; | |
324 | /* increase its refcnt because it is referenced by the svc table */ | |
325 | atomic_inc(&svc->refcnt); | |
326 | return 1; | |
327 | } | |
328 | ||
329 | ||
330 | /* | |
331 | * Unhashes a service from ip_vs_svc_table/ip_vs_svc_fwm_table. | |
332 | * Should be called with locked tables. | |
333 | */ | |
334 | static int ip_vs_svc_unhash(struct ip_vs_service *svc) | |
335 | { | |
336 | if (!(svc->flags & IP_VS_SVC_F_HASHED)) { | |
337 | IP_VS_ERR("ip_vs_svc_unhash(): request for unhash flagged, " | |
338 | "called from %p\n", __builtin_return_address(0)); | |
339 | return 0; | |
340 | } | |
341 | ||
342 | if (svc->fwmark == 0) { | |
343 | /* Remove it from the ip_vs_svc_table table */ | |
344 | list_del(&svc->s_list); | |
345 | } else { | |
346 | /* Remove it from the ip_vs_svc_fwm_table table */ | |
347 | list_del(&svc->f_list); | |
348 | } | |
349 | ||
350 | svc->flags &= ~IP_VS_SVC_F_HASHED; | |
351 | atomic_dec(&svc->refcnt); | |
352 | return 1; | |
353 | } | |
354 | ||
355 | ||
356 | /* | |
357 | * Get service by {proto,addr,port} in the service table. | |
358 | */ | |
359 | static __inline__ struct ip_vs_service * | |
360 | __ip_vs_service_get(__u16 protocol, __u32 vaddr, __u16 vport) | |
361 | { | |
362 | unsigned hash; | |
363 | struct ip_vs_service *svc; | |
364 | ||
365 | /* Check for "full" addressed entries */ | |
366 | hash = ip_vs_svc_hashkey(protocol, vaddr, vport); | |
367 | ||
368 | list_for_each_entry(svc, &ip_vs_svc_table[hash], s_list){ | |
369 | if ((svc->addr == vaddr) | |
370 | && (svc->port == vport) | |
371 | && (svc->protocol == protocol)) { | |
372 | /* HIT */ | |
373 | atomic_inc(&svc->usecnt); | |
374 | return svc; | |
375 | } | |
376 | } | |
377 | ||
378 | return NULL; | |
379 | } | |
380 | ||
381 | ||
382 | /* | |
383 | * Get service by {fwmark} in the service table. | |
384 | */ | |
385 | static __inline__ struct ip_vs_service *__ip_vs_svc_fwm_get(__u32 fwmark) | |
386 | { | |
387 | unsigned hash; | |
388 | struct ip_vs_service *svc; | |
389 | ||
390 | /* Check for fwmark addressed entries */ | |
391 | hash = ip_vs_svc_fwm_hashkey(fwmark); | |
392 | ||
393 | list_for_each_entry(svc, &ip_vs_svc_fwm_table[hash], f_list) { | |
394 | if (svc->fwmark == fwmark) { | |
395 | /* HIT */ | |
396 | atomic_inc(&svc->usecnt); | |
397 | return svc; | |
398 | } | |
399 | } | |
400 | ||
401 | return NULL; | |
402 | } | |
403 | ||
404 | struct ip_vs_service * | |
405 | ip_vs_service_get(__u32 fwmark, __u16 protocol, __u32 vaddr, __u16 vport) | |
406 | { | |
407 | struct ip_vs_service *svc; | |
408 | ||
409 | read_lock(&__ip_vs_svc_lock); | |
410 | ||
411 | /* | |
412 | * Check the table hashed by fwmark first | |
413 | */ | |
414 | if (fwmark && (svc = __ip_vs_svc_fwm_get(fwmark))) | |
415 | goto out; | |
416 | ||
417 | /* | |
418 | * Check the table hashed by <protocol,addr,port> | |
419 | * for "full" addressed entries | |
420 | */ | |
421 | svc = __ip_vs_service_get(protocol, vaddr, vport); | |
422 | ||
423 | if (svc == NULL | |
424 | && protocol == IPPROTO_TCP | |
425 | && atomic_read(&ip_vs_ftpsvc_counter) | |
426 | && (vport == FTPDATA || ntohs(vport) >= PROT_SOCK)) { | |
427 | /* | |
428 | * Check if ftp service entry exists, the packet | |
429 | * might belong to FTP data connections. | |
430 | */ | |
431 | svc = __ip_vs_service_get(protocol, vaddr, FTPPORT); | |
432 | } | |
433 | ||
434 | if (svc == NULL | |
435 | && atomic_read(&ip_vs_nullsvc_counter)) { | |
436 | /* | |
437 | * Check if the catch-all port (port zero) exists | |
438 | */ | |
439 | svc = __ip_vs_service_get(protocol, vaddr, 0); | |
440 | } | |
441 | ||
442 | out: | |
443 | read_unlock(&__ip_vs_svc_lock); | |
444 | ||
445 | IP_VS_DBG(6, "lookup service: fwm %u %s %u.%u.%u.%u:%u %s\n", | |
446 | fwmark, ip_vs_proto_name(protocol), | |
447 | NIPQUAD(vaddr), ntohs(vport), | |
448 | svc?"hit":"not hit"); | |
449 | ||
450 | return svc; | |
451 | } | |
452 | ||
453 | ||
454 | static inline void | |
455 | __ip_vs_bind_svc(struct ip_vs_dest *dest, struct ip_vs_service *svc) | |
456 | { | |
457 | atomic_inc(&svc->refcnt); | |
458 | dest->svc = svc; | |
459 | } | |
460 | ||
461 | static inline void | |
462 | __ip_vs_unbind_svc(struct ip_vs_dest *dest) | |
463 | { | |
464 | struct ip_vs_service *svc = dest->svc; | |
465 | ||
466 | dest->svc = NULL; | |
467 | if (atomic_dec_and_test(&svc->refcnt)) | |
468 | kfree(svc); | |
469 | } | |
470 | ||
471 | ||
472 | /* | |
473 | * Returns hash value for real service | |
474 | */ | |
475 | static __inline__ unsigned ip_vs_rs_hashkey(__u32 addr, __u16 port) | |
476 | { | |
477 | register unsigned porth = ntohs(port); | |
478 | ||
479 | return (ntohl(addr)^(porth>>IP_VS_RTAB_BITS)^porth) | |
480 | & IP_VS_RTAB_MASK; | |
481 | } | |
482 | ||
483 | /* | |
484 | * Hashes ip_vs_dest in ip_vs_rtable by <proto,addr,port>. | |
485 | * should be called with locked tables. | |
486 | */ | |
487 | static int ip_vs_rs_hash(struct ip_vs_dest *dest) | |
488 | { | |
489 | unsigned hash; | |
490 | ||
491 | if (!list_empty(&dest->d_list)) { | |
492 | return 0; | |
493 | } | |
494 | ||
495 | /* | |
496 | * Hash by proto,addr,port, | |
497 | * which are the parameters of the real service. | |
498 | */ | |
499 | hash = ip_vs_rs_hashkey(dest->addr, dest->port); | |
500 | list_add(&dest->d_list, &ip_vs_rtable[hash]); | |
501 | ||
502 | return 1; | |
503 | } | |
504 | ||
505 | /* | |
506 | * UNhashes ip_vs_dest from ip_vs_rtable. | |
507 | * should be called with locked tables. | |
508 | */ | |
509 | static int ip_vs_rs_unhash(struct ip_vs_dest *dest) | |
510 | { | |
511 | /* | |
512 | * Remove it from the ip_vs_rtable table. | |
513 | */ | |
514 | if (!list_empty(&dest->d_list)) { | |
515 | list_del(&dest->d_list); | |
516 | INIT_LIST_HEAD(&dest->d_list); | |
517 | } | |
518 | ||
519 | return 1; | |
520 | } | |
521 | ||
522 | /* | |
523 | * Lookup real service by <proto,addr,port> in the real service table. | |
524 | */ | |
525 | struct ip_vs_dest * | |
526 | ip_vs_lookup_real_service(__u16 protocol, __u32 daddr, __u16 dport) | |
527 | { | |
528 | unsigned hash; | |
529 | struct ip_vs_dest *dest; | |
530 | ||
531 | /* | |
532 | * Check for "full" addressed entries | |
533 | * Return the first found entry | |
534 | */ | |
535 | hash = ip_vs_rs_hashkey(daddr, dport); | |
536 | ||
537 | read_lock(&__ip_vs_rs_lock); | |
538 | list_for_each_entry(dest, &ip_vs_rtable[hash], d_list) { | |
539 | if ((dest->addr == daddr) | |
540 | && (dest->port == dport) | |
541 | && ((dest->protocol == protocol) || | |
542 | dest->vfwmark)) { | |
543 | /* HIT */ | |
544 | read_unlock(&__ip_vs_rs_lock); | |
545 | return dest; | |
546 | } | |
547 | } | |
548 | read_unlock(&__ip_vs_rs_lock); | |
549 | ||
550 | return NULL; | |
551 | } | |
552 | ||
553 | /* | |
554 | * Lookup destination by {addr,port} in the given service | |
555 | */ | |
556 | static struct ip_vs_dest * | |
557 | ip_vs_lookup_dest(struct ip_vs_service *svc, __u32 daddr, __u16 dport) | |
558 | { | |
559 | struct ip_vs_dest *dest; | |
560 | ||
561 | /* | |
562 | * Find the destination for the given service | |
563 | */ | |
564 | list_for_each_entry(dest, &svc->destinations, n_list) { | |
565 | if ((dest->addr == daddr) && (dest->port == dport)) { | |
566 | /* HIT */ | |
567 | return dest; | |
568 | } | |
569 | } | |
570 | ||
571 | return NULL; | |
572 | } | |
573 | ||
574 | ||
575 | /* | |
576 | * Lookup dest by {svc,addr,port} in the destination trash. | |
577 | * The destination trash is used to hold the destinations that are removed | |
578 | * from the service table but are still referenced by some conn entries. | |
579 | * The reason to add the destination trash is when the dest is temporary | |
580 | * down (either by administrator or by monitor program), the dest can be | |
581 | * picked back from the trash, the remaining connections to the dest can | |
582 | * continue, and the counting information of the dest is also useful for | |
583 | * scheduling. | |
584 | */ | |
585 | static struct ip_vs_dest * | |
586 | ip_vs_trash_get_dest(struct ip_vs_service *svc, __u32 daddr, __u16 dport) | |
587 | { | |
588 | struct ip_vs_dest *dest, *nxt; | |
589 | ||
590 | /* | |
591 | * Find the destination in trash | |
592 | */ | |
593 | list_for_each_entry_safe(dest, nxt, &ip_vs_dest_trash, n_list) { | |
594 | IP_VS_DBG(3, "Destination %u/%u.%u.%u.%u:%u still in trash, " | |
595 | "refcnt=%d\n", | |
596 | dest->vfwmark, | |
597 | NIPQUAD(dest->addr), ntohs(dest->port), | |
598 | atomic_read(&dest->refcnt)); | |
599 | if (dest->addr == daddr && | |
600 | dest->port == dport && | |
601 | dest->vfwmark == svc->fwmark && | |
602 | dest->protocol == svc->protocol && | |
603 | (svc->fwmark || | |
604 | (dest->vaddr == svc->addr && | |
605 | dest->vport == svc->port))) { | |
606 | /* HIT */ | |
607 | return dest; | |
608 | } | |
609 | ||
610 | /* | |
611 | * Try to purge the destination from trash if not referenced | |
612 | */ | |
613 | if (atomic_read(&dest->refcnt) == 1) { | |
614 | IP_VS_DBG(3, "Removing destination %u/%u.%u.%u.%u:%u " | |
615 | "from trash\n", | |
616 | dest->vfwmark, | |
617 | NIPQUAD(dest->addr), ntohs(dest->port)); | |
618 | list_del(&dest->n_list); | |
619 | ip_vs_dst_reset(dest); | |
620 | __ip_vs_unbind_svc(dest); | |
621 | kfree(dest); | |
622 | } | |
623 | } | |
624 | ||
625 | return NULL; | |
626 | } | |
627 | ||
628 | ||
629 | /* | |
630 | * Clean up all the destinations in the trash | |
631 | * Called by the ip_vs_control_cleanup() | |
632 | * | |
633 | * When the ip_vs_control_clearup is activated by ipvs module exit, | |
634 | * the service tables must have been flushed and all the connections | |
635 | * are expired, and the refcnt of each destination in the trash must | |
636 | * be 1, so we simply release them here. | |
637 | */ | |
638 | static void ip_vs_trash_cleanup(void) | |
639 | { | |
640 | struct ip_vs_dest *dest, *nxt; | |
641 | ||
642 | list_for_each_entry_safe(dest, nxt, &ip_vs_dest_trash, n_list) { | |
643 | list_del(&dest->n_list); | |
644 | ip_vs_dst_reset(dest); | |
645 | __ip_vs_unbind_svc(dest); | |
646 | kfree(dest); | |
647 | } | |
648 | } | |
649 | ||
650 | ||
651 | static void | |
652 | ip_vs_zero_stats(struct ip_vs_stats *stats) | |
653 | { | |
654 | spin_lock_bh(&stats->lock); | |
655 | memset(stats, 0, (char *)&stats->lock - (char *)stats); | |
656 | spin_unlock_bh(&stats->lock); | |
657 | ip_vs_zero_estimator(stats); | |
658 | } | |
659 | ||
660 | /* | |
661 | * Update a destination in the given service | |
662 | */ | |
663 | static void | |
664 | __ip_vs_update_dest(struct ip_vs_service *svc, | |
665 | struct ip_vs_dest *dest, struct ip_vs_dest_user *udest) | |
666 | { | |
667 | int conn_flags; | |
668 | ||
669 | /* set the weight and the flags */ | |
670 | atomic_set(&dest->weight, udest->weight); | |
671 | conn_flags = udest->conn_flags | IP_VS_CONN_F_INACTIVE; | |
672 | ||
673 | /* check if local node and update the flags */ | |
674 | if (inet_addr_type(udest->addr) == RTN_LOCAL) { | |
675 | conn_flags = (conn_flags & ~IP_VS_CONN_F_FWD_MASK) | |
676 | | IP_VS_CONN_F_LOCALNODE; | |
677 | } | |
678 | ||
679 | /* set the IP_VS_CONN_F_NOOUTPUT flag if not masquerading/NAT */ | |
680 | if ((conn_flags & IP_VS_CONN_F_FWD_MASK) != 0) { | |
681 | conn_flags |= IP_VS_CONN_F_NOOUTPUT; | |
682 | } else { | |
683 | /* | |
684 | * Put the real service in ip_vs_rtable if not present. | |
685 | * For now only for NAT! | |
686 | */ | |
687 | write_lock_bh(&__ip_vs_rs_lock); | |
688 | ip_vs_rs_hash(dest); | |
689 | write_unlock_bh(&__ip_vs_rs_lock); | |
690 | } | |
691 | atomic_set(&dest->conn_flags, conn_flags); | |
692 | ||
693 | /* bind the service */ | |
694 | if (!dest->svc) { | |
695 | __ip_vs_bind_svc(dest, svc); | |
696 | } else { | |
697 | if (dest->svc != svc) { | |
698 | __ip_vs_unbind_svc(dest); | |
699 | ip_vs_zero_stats(&dest->stats); | |
700 | __ip_vs_bind_svc(dest, svc); | |
701 | } | |
702 | } | |
703 | ||
704 | /* set the dest status flags */ | |
705 | dest->flags |= IP_VS_DEST_F_AVAILABLE; | |
706 | ||
707 | if (udest->u_threshold == 0 || udest->u_threshold > dest->u_threshold) | |
708 | dest->flags &= ~IP_VS_DEST_F_OVERLOAD; | |
709 | dest->u_threshold = udest->u_threshold; | |
710 | dest->l_threshold = udest->l_threshold; | |
711 | } | |
712 | ||
713 | ||
714 | /* | |
715 | * Create a destination for the given service | |
716 | */ | |
717 | static int | |
718 | ip_vs_new_dest(struct ip_vs_service *svc, struct ip_vs_dest_user *udest, | |
719 | struct ip_vs_dest **dest_p) | |
720 | { | |
721 | struct ip_vs_dest *dest; | |
722 | unsigned atype; | |
723 | ||
724 | EnterFunction(2); | |
725 | ||
726 | atype = inet_addr_type(udest->addr); | |
727 | if (atype != RTN_LOCAL && atype != RTN_UNICAST) | |
728 | return -EINVAL; | |
729 | ||
730 | dest = kmalloc(sizeof(struct ip_vs_dest), GFP_ATOMIC); | |
731 | if (dest == NULL) { | |
732 | IP_VS_ERR("ip_vs_new_dest: kmalloc failed.\n"); | |
733 | return -ENOMEM; | |
734 | } | |
735 | memset(dest, 0, sizeof(struct ip_vs_dest)); | |
736 | ||
737 | dest->protocol = svc->protocol; | |
738 | dest->vaddr = svc->addr; | |
739 | dest->vport = svc->port; | |
740 | dest->vfwmark = svc->fwmark; | |
741 | dest->addr = udest->addr; | |
742 | dest->port = udest->port; | |
743 | ||
744 | atomic_set(&dest->activeconns, 0); | |
745 | atomic_set(&dest->inactconns, 0); | |
746 | atomic_set(&dest->persistconns, 0); | |
747 | atomic_set(&dest->refcnt, 0); | |
748 | ||
749 | INIT_LIST_HEAD(&dest->d_list); | |
750 | spin_lock_init(&dest->dst_lock); | |
751 | spin_lock_init(&dest->stats.lock); | |
752 | __ip_vs_update_dest(svc, dest, udest); | |
753 | ip_vs_new_estimator(&dest->stats); | |
754 | ||
755 | *dest_p = dest; | |
756 | ||
757 | LeaveFunction(2); | |
758 | return 0; | |
759 | } | |
760 | ||
761 | ||
762 | /* | |
763 | * Add a destination into an existing service | |
764 | */ | |
765 | static int | |
766 | ip_vs_add_dest(struct ip_vs_service *svc, struct ip_vs_dest_user *udest) | |
767 | { | |
768 | struct ip_vs_dest *dest; | |
769 | __u32 daddr = udest->addr; | |
770 | __u16 dport = udest->port; | |
771 | int ret; | |
772 | ||
773 | EnterFunction(2); | |
774 | ||
775 | if (udest->weight < 0) { | |
776 | IP_VS_ERR("ip_vs_add_dest(): server weight less than zero\n"); | |
777 | return -ERANGE; | |
778 | } | |
779 | ||
780 | if (udest->l_threshold > udest->u_threshold) { | |
781 | IP_VS_ERR("ip_vs_add_dest(): lower threshold is higher than " | |
782 | "upper threshold\n"); | |
783 | return -ERANGE; | |
784 | } | |
785 | ||
786 | /* | |
787 | * Check if the dest already exists in the list | |
788 | */ | |
789 | dest = ip_vs_lookup_dest(svc, daddr, dport); | |
790 | if (dest != NULL) { | |
791 | IP_VS_DBG(1, "ip_vs_add_dest(): dest already exists\n"); | |
792 | return -EEXIST; | |
793 | } | |
794 | ||
795 | /* | |
796 | * Check if the dest already exists in the trash and | |
797 | * is from the same service | |
798 | */ | |
799 | dest = ip_vs_trash_get_dest(svc, daddr, dport); | |
800 | if (dest != NULL) { | |
801 | IP_VS_DBG(3, "Get destination %u.%u.%u.%u:%u from trash, " | |
802 | "refcnt=%d, service %u/%u.%u.%u.%u:%u\n", | |
803 | NIPQUAD(daddr), ntohs(dport), | |
804 | atomic_read(&dest->refcnt), | |
805 | dest->vfwmark, | |
806 | NIPQUAD(dest->vaddr), | |
807 | ntohs(dest->vport)); | |
808 | __ip_vs_update_dest(svc, dest, udest); | |
809 | ||
810 | /* | |
811 | * Get the destination from the trash | |
812 | */ | |
813 | list_del(&dest->n_list); | |
814 | ||
815 | ip_vs_new_estimator(&dest->stats); | |
816 | ||
817 | write_lock_bh(&__ip_vs_svc_lock); | |
818 | ||
819 | /* | |
820 | * Wait until all other svc users go away. | |
821 | */ | |
822 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1); | |
823 | ||
824 | list_add(&dest->n_list, &svc->destinations); | |
825 | svc->num_dests++; | |
826 | ||
827 | /* call the update_service function of its scheduler */ | |
828 | svc->scheduler->update_service(svc); | |
829 | ||
830 | write_unlock_bh(&__ip_vs_svc_lock); | |
831 | return 0; | |
832 | } | |
833 | ||
834 | /* | |
835 | * Allocate and initialize the dest structure | |
836 | */ | |
837 | ret = ip_vs_new_dest(svc, udest, &dest); | |
838 | if (ret) { | |
839 | return ret; | |
840 | } | |
841 | ||
842 | /* | |
843 | * Add the dest entry into the list | |
844 | */ | |
845 | atomic_inc(&dest->refcnt); | |
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 | ||
862 | LeaveFunction(2); | |
863 | ||
864 | return 0; | |
865 | } | |
866 | ||
867 | ||
868 | /* | |
869 | * Edit a destination in the given service | |
870 | */ | |
871 | static int | |
872 | ip_vs_edit_dest(struct ip_vs_service *svc, struct ip_vs_dest_user *udest) | |
873 | { | |
874 | struct ip_vs_dest *dest; | |
875 | __u32 daddr = udest->addr; | |
876 | __u16 dport = udest->port; | |
877 | ||
878 | EnterFunction(2); | |
879 | ||
880 | if (udest->weight < 0) { | |
881 | IP_VS_ERR("ip_vs_edit_dest(): server weight less than zero\n"); | |
882 | return -ERANGE; | |
883 | } | |
884 | ||
885 | if (udest->l_threshold > udest->u_threshold) { | |
886 | IP_VS_ERR("ip_vs_edit_dest(): lower threshold is higher than " | |
887 | "upper threshold\n"); | |
888 | return -ERANGE; | |
889 | } | |
890 | ||
891 | /* | |
892 | * Lookup the destination list | |
893 | */ | |
894 | dest = ip_vs_lookup_dest(svc, daddr, dport); | |
895 | if (dest == NULL) { | |
896 | IP_VS_DBG(1, "ip_vs_edit_dest(): dest doesn't exist\n"); | |
897 | return -ENOENT; | |
898 | } | |
899 | ||
900 | __ip_vs_update_dest(svc, dest, udest); | |
901 | ||
902 | write_lock_bh(&__ip_vs_svc_lock); | |
903 | ||
904 | /* Wait until all other svc users go away */ | |
905 | while (atomic_read(&svc->usecnt) > 1) {}; | |
906 | ||
907 | /* call the update_service, because server weight may be changed */ | |
908 | svc->scheduler->update_service(svc); | |
909 | ||
910 | write_unlock_bh(&__ip_vs_svc_lock); | |
911 | ||
912 | LeaveFunction(2); | |
913 | ||
914 | return 0; | |
915 | } | |
916 | ||
917 | ||
918 | /* | |
919 | * Delete a destination (must be already unlinked from the service) | |
920 | */ | |
921 | static void __ip_vs_del_dest(struct ip_vs_dest *dest) | |
922 | { | |
923 | ip_vs_kill_estimator(&dest->stats); | |
924 | ||
925 | /* | |
926 | * Remove it from the d-linked list with the real services. | |
927 | */ | |
928 | write_lock_bh(&__ip_vs_rs_lock); | |
929 | ip_vs_rs_unhash(dest); | |
930 | write_unlock_bh(&__ip_vs_rs_lock); | |
931 | ||
932 | /* | |
933 | * Decrease the refcnt of the dest, and free the dest | |
934 | * if nobody refers to it (refcnt=0). Otherwise, throw | |
935 | * the destination into the trash. | |
936 | */ | |
937 | if (atomic_dec_and_test(&dest->refcnt)) { | |
938 | ip_vs_dst_reset(dest); | |
939 | /* simply decrease svc->refcnt here, let the caller check | |
940 | and release the service if nobody refers to it. | |
941 | Only user context can release destination and service, | |
942 | and only one user context can update virtual service at a | |
943 | time, so the operation here is OK */ | |
944 | atomic_dec(&dest->svc->refcnt); | |
945 | kfree(dest); | |
946 | } else { | |
947 | IP_VS_DBG(3, "Moving dest %u.%u.%u.%u:%u into trash, refcnt=%d\n", | |
948 | NIPQUAD(dest->addr), ntohs(dest->port), | |
949 | atomic_read(&dest->refcnt)); | |
950 | list_add(&dest->n_list, &ip_vs_dest_trash); | |
951 | atomic_inc(&dest->refcnt); | |
952 | } | |
953 | } | |
954 | ||
955 | ||
956 | /* | |
957 | * Unlink a destination from the given service | |
958 | */ | |
959 | static void __ip_vs_unlink_dest(struct ip_vs_service *svc, | |
960 | struct ip_vs_dest *dest, | |
961 | int svcupd) | |
962 | { | |
963 | dest->flags &= ~IP_VS_DEST_F_AVAILABLE; | |
964 | ||
965 | /* | |
966 | * Remove it from the d-linked destination list. | |
967 | */ | |
968 | list_del(&dest->n_list); | |
969 | svc->num_dests--; | |
970 | if (svcupd) { | |
971 | /* | |
972 | * Call the update_service function of its scheduler | |
973 | */ | |
974 | svc->scheduler->update_service(svc); | |
975 | } | |
976 | } | |
977 | ||
978 | ||
979 | /* | |
980 | * Delete a destination server in the given service | |
981 | */ | |
982 | static int | |
983 | ip_vs_del_dest(struct ip_vs_service *svc,struct ip_vs_dest_user *udest) | |
984 | { | |
985 | struct ip_vs_dest *dest; | |
986 | __u32 daddr = udest->addr; | |
987 | __u16 dport = udest->port; | |
988 | ||
989 | EnterFunction(2); | |
990 | ||
991 | dest = ip_vs_lookup_dest(svc, daddr, dport); | |
992 | if (dest == NULL) { | |
993 | IP_VS_DBG(1, "ip_vs_del_dest(): destination not found!\n"); | |
994 | return -ENOENT; | |
995 | } | |
996 | ||
997 | write_lock_bh(&__ip_vs_svc_lock); | |
998 | ||
999 | /* | |
1000 | * Wait until all other svc users go away. | |
1001 | */ | |
1002 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1); | |
1003 | ||
1004 | /* | |
1005 | * Unlink dest from the service | |
1006 | */ | |
1007 | __ip_vs_unlink_dest(svc, dest, 1); | |
1008 | ||
1009 | write_unlock_bh(&__ip_vs_svc_lock); | |
1010 | ||
1011 | /* | |
1012 | * Delete the destination | |
1013 | */ | |
1014 | __ip_vs_del_dest(dest); | |
1015 | ||
1016 | LeaveFunction(2); | |
1017 | ||
1018 | return 0; | |
1019 | } | |
1020 | ||
1021 | ||
1022 | /* | |
1023 | * Add a service into the service hash table | |
1024 | */ | |
1025 | static int | |
1026 | ip_vs_add_service(struct ip_vs_service_user *u, struct ip_vs_service **svc_p) | |
1027 | { | |
1028 | int ret = 0; | |
1029 | struct ip_vs_scheduler *sched = NULL; | |
1030 | struct ip_vs_service *svc = NULL; | |
1031 | ||
1032 | /* increase the module use count */ | |
1033 | ip_vs_use_count_inc(); | |
1034 | ||
1035 | /* Lookup the scheduler by 'u->sched_name' */ | |
1036 | sched = ip_vs_scheduler_get(u->sched_name); | |
1037 | if (sched == NULL) { | |
1038 | IP_VS_INFO("Scheduler module ip_vs_%s not found\n", | |
1039 | u->sched_name); | |
1040 | ret = -ENOENT; | |
1041 | goto out_mod_dec; | |
1042 | } | |
1043 | ||
1044 | svc = (struct ip_vs_service *) | |
1045 | kmalloc(sizeof(struct ip_vs_service), GFP_ATOMIC); | |
1046 | if (svc == NULL) { | |
1047 | IP_VS_DBG(1, "ip_vs_add_service: kmalloc failed.\n"); | |
1048 | ret = -ENOMEM; | |
1049 | goto out_err; | |
1050 | } | |
1051 | memset(svc, 0, sizeof(struct ip_vs_service)); | |
1052 | ||
1053 | /* I'm the first user of the service */ | |
1054 | atomic_set(&svc->usecnt, 1); | |
1055 | atomic_set(&svc->refcnt, 0); | |
1056 | ||
1057 | svc->protocol = u->protocol; | |
1058 | svc->addr = u->addr; | |
1059 | svc->port = u->port; | |
1060 | svc->fwmark = u->fwmark; | |
1061 | svc->flags = u->flags; | |
1062 | svc->timeout = u->timeout * HZ; | |
1063 | svc->netmask = u->netmask; | |
1064 | ||
1065 | INIT_LIST_HEAD(&svc->destinations); | |
1066 | rwlock_init(&svc->sched_lock); | |
1067 | spin_lock_init(&svc->stats.lock); | |
1068 | ||
1069 | /* Bind the scheduler */ | |
1070 | ret = ip_vs_bind_scheduler(svc, sched); | |
1071 | if (ret) | |
1072 | goto out_err; | |
1073 | sched = NULL; | |
1074 | ||
1075 | /* Update the virtual service counters */ | |
1076 | if (svc->port == FTPPORT) | |
1077 | atomic_inc(&ip_vs_ftpsvc_counter); | |
1078 | else if (svc->port == 0) | |
1079 | atomic_inc(&ip_vs_nullsvc_counter); | |
1080 | ||
1081 | ip_vs_new_estimator(&svc->stats); | |
1082 | ip_vs_num_services++; | |
1083 | ||
1084 | /* Hash the service into the service table */ | |
1085 | write_lock_bh(&__ip_vs_svc_lock); | |
1086 | ip_vs_svc_hash(svc); | |
1087 | write_unlock_bh(&__ip_vs_svc_lock); | |
1088 | ||
1089 | *svc_p = svc; | |
1090 | return 0; | |
1091 | ||
1092 | out_err: | |
1093 | if (svc != NULL) { | |
1094 | if (svc->scheduler) | |
1095 | ip_vs_unbind_scheduler(svc); | |
1096 | if (svc->inc) { | |
1097 | local_bh_disable(); | |
1098 | ip_vs_app_inc_put(svc->inc); | |
1099 | local_bh_enable(); | |
1100 | } | |
1101 | kfree(svc); | |
1102 | } | |
1103 | ip_vs_scheduler_put(sched); | |
1104 | ||
1105 | out_mod_dec: | |
1106 | /* decrease the module use count */ | |
1107 | ip_vs_use_count_dec(); | |
1108 | ||
1109 | return ret; | |
1110 | } | |
1111 | ||
1112 | ||
1113 | /* | |
1114 | * Edit a service and bind it with a new scheduler | |
1115 | */ | |
1116 | static int | |
1117 | ip_vs_edit_service(struct ip_vs_service *svc, struct ip_vs_service_user *u) | |
1118 | { | |
1119 | struct ip_vs_scheduler *sched, *old_sched; | |
1120 | int ret = 0; | |
1121 | ||
1122 | /* | |
1123 | * Lookup the scheduler, by 'u->sched_name' | |
1124 | */ | |
1125 | sched = ip_vs_scheduler_get(u->sched_name); | |
1126 | if (sched == NULL) { | |
1127 | IP_VS_INFO("Scheduler module ip_vs_%s not found\n", | |
1128 | u->sched_name); | |
1129 | return -ENOENT; | |
1130 | } | |
1131 | old_sched = sched; | |
1132 | ||
1133 | write_lock_bh(&__ip_vs_svc_lock); | |
1134 | ||
1135 | /* | |
1136 | * Wait until all other svc users go away. | |
1137 | */ | |
1138 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1); | |
1139 | ||
1140 | /* | |
1141 | * Set the flags and timeout value | |
1142 | */ | |
1143 | svc->flags = u->flags | IP_VS_SVC_F_HASHED; | |
1144 | svc->timeout = u->timeout * HZ; | |
1145 | svc->netmask = u->netmask; | |
1146 | ||
1147 | old_sched = svc->scheduler; | |
1148 | if (sched != old_sched) { | |
1149 | /* | |
1150 | * Unbind the old scheduler | |
1151 | */ | |
1152 | if ((ret = ip_vs_unbind_scheduler(svc))) { | |
1153 | old_sched = sched; | |
1154 | goto out; | |
1155 | } | |
1156 | ||
1157 | /* | |
1158 | * Bind the new scheduler | |
1159 | */ | |
1160 | if ((ret = ip_vs_bind_scheduler(svc, sched))) { | |
1161 | /* | |
1162 | * If ip_vs_bind_scheduler fails, restore the old | |
1163 | * scheduler. | |
1164 | * The main reason of failure is out of memory. | |
1165 | * | |
1166 | * The question is if the old scheduler can be | |
1167 | * restored all the time. TODO: if it cannot be | |
1168 | * restored some time, we must delete the service, | |
1169 | * otherwise the system may crash. | |
1170 | */ | |
1171 | ip_vs_bind_scheduler(svc, old_sched); | |
1172 | old_sched = sched; | |
1173 | goto out; | |
1174 | } | |
1175 | } | |
1176 | ||
1177 | out: | |
1178 | write_unlock_bh(&__ip_vs_svc_lock); | |
1179 | ||
1180 | if (old_sched) | |
1181 | ip_vs_scheduler_put(old_sched); | |
1182 | ||
1183 | return ret; | |
1184 | } | |
1185 | ||
1186 | ||
1187 | /* | |
1188 | * Delete a service from the service list | |
1189 | * - The service must be unlinked, unlocked and not referenced! | |
1190 | * - We are called under _bh lock | |
1191 | */ | |
1192 | static void __ip_vs_del_service(struct ip_vs_service *svc) | |
1193 | { | |
1194 | struct ip_vs_dest *dest, *nxt; | |
1195 | struct ip_vs_scheduler *old_sched; | |
1196 | ||
1197 | ip_vs_num_services--; | |
1198 | ip_vs_kill_estimator(&svc->stats); | |
1199 | ||
1200 | /* Unbind scheduler */ | |
1201 | old_sched = svc->scheduler; | |
1202 | ip_vs_unbind_scheduler(svc); | |
1203 | if (old_sched) | |
1204 | ip_vs_scheduler_put(old_sched); | |
1205 | ||
1206 | /* Unbind app inc */ | |
1207 | if (svc->inc) { | |
1208 | ip_vs_app_inc_put(svc->inc); | |
1209 | svc->inc = NULL; | |
1210 | } | |
1211 | ||
1212 | /* | |
1213 | * Unlink the whole destination list | |
1214 | */ | |
1215 | list_for_each_entry_safe(dest, nxt, &svc->destinations, n_list) { | |
1216 | __ip_vs_unlink_dest(svc, dest, 0); | |
1217 | __ip_vs_del_dest(dest); | |
1218 | } | |
1219 | ||
1220 | /* | |
1221 | * Update the virtual service counters | |
1222 | */ | |
1223 | if (svc->port == FTPPORT) | |
1224 | atomic_dec(&ip_vs_ftpsvc_counter); | |
1225 | else if (svc->port == 0) | |
1226 | atomic_dec(&ip_vs_nullsvc_counter); | |
1227 | ||
1228 | /* | |
1229 | * Free the service if nobody refers to it | |
1230 | */ | |
1231 | if (atomic_read(&svc->refcnt) == 0) | |
1232 | kfree(svc); | |
1233 | ||
1234 | /* decrease the module use count */ | |
1235 | ip_vs_use_count_dec(); | |
1236 | } | |
1237 | ||
1238 | /* | |
1239 | * Delete a service from the service list | |
1240 | */ | |
1241 | static int ip_vs_del_service(struct ip_vs_service *svc) | |
1242 | { | |
1243 | if (svc == NULL) | |
1244 | return -EEXIST; | |
1245 | ||
1246 | /* | |
1247 | * Unhash it from the service table | |
1248 | */ | |
1249 | write_lock_bh(&__ip_vs_svc_lock); | |
1250 | ||
1251 | ip_vs_svc_unhash(svc); | |
1252 | ||
1253 | /* | |
1254 | * Wait until all the svc users go away. | |
1255 | */ | |
1256 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1); | |
1257 | ||
1258 | __ip_vs_del_service(svc); | |
1259 | ||
1260 | write_unlock_bh(&__ip_vs_svc_lock); | |
1261 | ||
1262 | return 0; | |
1263 | } | |
1264 | ||
1265 | ||
1266 | /* | |
1267 | * Flush all the virtual services | |
1268 | */ | |
1269 | static int ip_vs_flush(void) | |
1270 | { | |
1271 | int idx; | |
1272 | struct ip_vs_service *svc, *nxt; | |
1273 | ||
1274 | /* | |
1275 | * Flush the service table hashed by <protocol,addr,port> | |
1276 | */ | |
1277 | for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
1278 | list_for_each_entry_safe(svc, nxt, &ip_vs_svc_table[idx], s_list) { | |
1279 | write_lock_bh(&__ip_vs_svc_lock); | |
1280 | ip_vs_svc_unhash(svc); | |
1281 | /* | |
1282 | * Wait until all the svc users go away. | |
1283 | */ | |
1284 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 0); | |
1285 | __ip_vs_del_service(svc); | |
1286 | write_unlock_bh(&__ip_vs_svc_lock); | |
1287 | } | |
1288 | } | |
1289 | ||
1290 | /* | |
1291 | * Flush the service table hashed by fwmark | |
1292 | */ | |
1293 | for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
1294 | list_for_each_entry_safe(svc, nxt, | |
1295 | &ip_vs_svc_fwm_table[idx], f_list) { | |
1296 | write_lock_bh(&__ip_vs_svc_lock); | |
1297 | ip_vs_svc_unhash(svc); | |
1298 | /* | |
1299 | * Wait until all the svc users go away. | |
1300 | */ | |
1301 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 0); | |
1302 | __ip_vs_del_service(svc); | |
1303 | write_unlock_bh(&__ip_vs_svc_lock); | |
1304 | } | |
1305 | } | |
1306 | ||
1307 | return 0; | |
1308 | } | |
1309 | ||
1310 | ||
1311 | /* | |
1312 | * Zero counters in a service or all services | |
1313 | */ | |
1314 | static int ip_vs_zero_service(struct ip_vs_service *svc) | |
1315 | { | |
1316 | struct ip_vs_dest *dest; | |
1317 | ||
1318 | write_lock_bh(&__ip_vs_svc_lock); | |
1319 | list_for_each_entry(dest, &svc->destinations, n_list) { | |
1320 | ip_vs_zero_stats(&dest->stats); | |
1321 | } | |
1322 | ip_vs_zero_stats(&svc->stats); | |
1323 | write_unlock_bh(&__ip_vs_svc_lock); | |
1324 | return 0; | |
1325 | } | |
1326 | ||
1327 | static int ip_vs_zero_all(void) | |
1328 | { | |
1329 | int idx; | |
1330 | struct ip_vs_service *svc; | |
1331 | ||
1332 | for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
1333 | list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) { | |
1334 | ip_vs_zero_service(svc); | |
1335 | } | |
1336 | } | |
1337 | ||
1338 | for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
1339 | list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) { | |
1340 | ip_vs_zero_service(svc); | |
1341 | } | |
1342 | } | |
1343 | ||
1344 | ip_vs_zero_stats(&ip_vs_stats); | |
1345 | return 0; | |
1346 | } | |
1347 | ||
1348 | ||
1349 | static int | |
1350 | proc_do_defense_mode(ctl_table *table, int write, struct file * filp, | |
1351 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
1352 | { | |
1353 | int *valp = table->data; | |
1354 | int val = *valp; | |
1355 | int rc; | |
1356 | ||
1357 | rc = proc_dointvec(table, write, filp, buffer, lenp, ppos); | |
1358 | if (write && (*valp != val)) { | |
1359 | if ((*valp < 0) || (*valp > 3)) { | |
1360 | /* Restore the correct value */ | |
1361 | *valp = val; | |
1362 | } else { | |
1363 | local_bh_disable(); | |
1364 | update_defense_level(); | |
1365 | local_bh_enable(); | |
1366 | } | |
1367 | } | |
1368 | return rc; | |
1369 | } | |
1370 | ||
1371 | ||
1372 | static int | |
1373 | proc_do_sync_threshold(ctl_table *table, int write, struct file *filp, | |
1374 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
1375 | { | |
1376 | int *valp = table->data; | |
1377 | int val[2]; | |
1378 | int rc; | |
1379 | ||
1380 | /* backup the value first */ | |
1381 | memcpy(val, valp, sizeof(val)); | |
1382 | ||
1383 | rc = proc_dointvec(table, write, filp, buffer, lenp, ppos); | |
1384 | if (write && (valp[0] < 0 || valp[1] < 0 || valp[0] >= valp[1])) { | |
1385 | /* Restore the correct value */ | |
1386 | memcpy(valp, val, sizeof(val)); | |
1387 | } | |
1388 | return rc; | |
1389 | } | |
1390 | ||
1391 | ||
1392 | /* | |
1393 | * IPVS sysctl table (under the /proc/sys/net/ipv4/vs/) | |
1394 | */ | |
1395 | ||
1396 | static struct ctl_table vs_vars[] = { | |
1397 | { | |
1398 | .ctl_name = NET_IPV4_VS_AMEMTHRESH, | |
1399 | .procname = "amemthresh", | |
1400 | .data = &sysctl_ip_vs_amemthresh, | |
1401 | .maxlen = sizeof(int), | |
1402 | .mode = 0644, | |
1403 | .proc_handler = &proc_dointvec, | |
1404 | }, | |
1405 | #ifdef CONFIG_IP_VS_DEBUG | |
1406 | { | |
1407 | .ctl_name = NET_IPV4_VS_DEBUG_LEVEL, | |
1408 | .procname = "debug_level", | |
1409 | .data = &sysctl_ip_vs_debug_level, | |
1410 | .maxlen = sizeof(int), | |
1411 | .mode = 0644, | |
1412 | .proc_handler = &proc_dointvec, | |
1413 | }, | |
1414 | #endif | |
1415 | { | |
1416 | .ctl_name = NET_IPV4_VS_AMDROPRATE, | |
1417 | .procname = "am_droprate", | |
1418 | .data = &sysctl_ip_vs_am_droprate, | |
1419 | .maxlen = sizeof(int), | |
1420 | .mode = 0644, | |
1421 | .proc_handler = &proc_dointvec, | |
1422 | }, | |
1423 | { | |
1424 | .ctl_name = NET_IPV4_VS_DROP_ENTRY, | |
1425 | .procname = "drop_entry", | |
1426 | .data = &sysctl_ip_vs_drop_entry, | |
1427 | .maxlen = sizeof(int), | |
1428 | .mode = 0644, | |
1429 | .proc_handler = &proc_do_defense_mode, | |
1430 | }, | |
1431 | { | |
1432 | .ctl_name = NET_IPV4_VS_DROP_PACKET, | |
1433 | .procname = "drop_packet", | |
1434 | .data = &sysctl_ip_vs_drop_packet, | |
1435 | .maxlen = sizeof(int), | |
1436 | .mode = 0644, | |
1437 | .proc_handler = &proc_do_defense_mode, | |
1438 | }, | |
1439 | { | |
1440 | .ctl_name = NET_IPV4_VS_SECURE_TCP, | |
1441 | .procname = "secure_tcp", | |
1442 | .data = &sysctl_ip_vs_secure_tcp, | |
1443 | .maxlen = sizeof(int), | |
1444 | .mode = 0644, | |
1445 | .proc_handler = &proc_do_defense_mode, | |
1446 | }, | |
1447 | #if 0 | |
1448 | { | |
1449 | .ctl_name = NET_IPV4_VS_TO_ES, | |
1450 | .procname = "timeout_established", | |
1451 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_ESTABLISHED], | |
1452 | .maxlen = sizeof(int), | |
1453 | .mode = 0644, | |
1454 | .proc_handler = &proc_dointvec_jiffies, | |
1455 | }, | |
1456 | { | |
1457 | .ctl_name = NET_IPV4_VS_TO_SS, | |
1458 | .procname = "timeout_synsent", | |
1459 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYN_SENT], | |
1460 | .maxlen = sizeof(int), | |
1461 | .mode = 0644, | |
1462 | .proc_handler = &proc_dointvec_jiffies, | |
1463 | }, | |
1464 | { | |
1465 | .ctl_name = NET_IPV4_VS_TO_SR, | |
1466 | .procname = "timeout_synrecv", | |
1467 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYN_RECV], | |
1468 | .maxlen = sizeof(int), | |
1469 | .mode = 0644, | |
1470 | .proc_handler = &proc_dointvec_jiffies, | |
1471 | }, | |
1472 | { | |
1473 | .ctl_name = NET_IPV4_VS_TO_FW, | |
1474 | .procname = "timeout_finwait", | |
1475 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_FIN_WAIT], | |
1476 | .maxlen = sizeof(int), | |
1477 | .mode = 0644, | |
1478 | .proc_handler = &proc_dointvec_jiffies, | |
1479 | }, | |
1480 | { | |
1481 | .ctl_name = NET_IPV4_VS_TO_TW, | |
1482 | .procname = "timeout_timewait", | |
1483 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_TIME_WAIT], | |
1484 | .maxlen = sizeof(int), | |
1485 | .mode = 0644, | |
1486 | .proc_handler = &proc_dointvec_jiffies, | |
1487 | }, | |
1488 | { | |
1489 | .ctl_name = NET_IPV4_VS_TO_CL, | |
1490 | .procname = "timeout_close", | |
1491 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_CLOSE], | |
1492 | .maxlen = sizeof(int), | |
1493 | .mode = 0644, | |
1494 | .proc_handler = &proc_dointvec_jiffies, | |
1495 | }, | |
1496 | { | |
1497 | .ctl_name = NET_IPV4_VS_TO_CW, | |
1498 | .procname = "timeout_closewait", | |
1499 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_CLOSE_WAIT], | |
1500 | .maxlen = sizeof(int), | |
1501 | .mode = 0644, | |
1502 | .proc_handler = &proc_dointvec_jiffies, | |
1503 | }, | |
1504 | { | |
1505 | .ctl_name = NET_IPV4_VS_TO_LA, | |
1506 | .procname = "timeout_lastack", | |
1507 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_LAST_ACK], | |
1508 | .maxlen = sizeof(int), | |
1509 | .mode = 0644, | |
1510 | .proc_handler = &proc_dointvec_jiffies, | |
1511 | }, | |
1512 | { | |
1513 | .ctl_name = NET_IPV4_VS_TO_LI, | |
1514 | .procname = "timeout_listen", | |
1515 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_LISTEN], | |
1516 | .maxlen = sizeof(int), | |
1517 | .mode = 0644, | |
1518 | .proc_handler = &proc_dointvec_jiffies, | |
1519 | }, | |
1520 | { | |
1521 | .ctl_name = NET_IPV4_VS_TO_SA, | |
1522 | .procname = "timeout_synack", | |
1523 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYNACK], | |
1524 | .maxlen = sizeof(int), | |
1525 | .mode = 0644, | |
1526 | .proc_handler = &proc_dointvec_jiffies, | |
1527 | }, | |
1528 | { | |
1529 | .ctl_name = NET_IPV4_VS_TO_UDP, | |
1530 | .procname = "timeout_udp", | |
1531 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_UDP], | |
1532 | .maxlen = sizeof(int), | |
1533 | .mode = 0644, | |
1534 | .proc_handler = &proc_dointvec_jiffies, | |
1535 | }, | |
1536 | { | |
1537 | .ctl_name = NET_IPV4_VS_TO_ICMP, | |
1538 | .procname = "timeout_icmp", | |
1539 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_ICMP], | |
1540 | .maxlen = sizeof(int), | |
1541 | .mode = 0644, | |
1542 | .proc_handler = &proc_dointvec_jiffies, | |
1543 | }, | |
1544 | #endif | |
1545 | { | |
1546 | .ctl_name = NET_IPV4_VS_CACHE_BYPASS, | |
1547 | .procname = "cache_bypass", | |
1548 | .data = &sysctl_ip_vs_cache_bypass, | |
1549 | .maxlen = sizeof(int), | |
1550 | .mode = 0644, | |
1551 | .proc_handler = &proc_dointvec, | |
1552 | }, | |
1553 | { | |
1554 | .ctl_name = NET_IPV4_VS_EXPIRE_NODEST_CONN, | |
1555 | .procname = "expire_nodest_conn", | |
1556 | .data = &sysctl_ip_vs_expire_nodest_conn, | |
1557 | .maxlen = sizeof(int), | |
1558 | .mode = 0644, | |
1559 | .proc_handler = &proc_dointvec, | |
1560 | }, | |
1561 | { | |
1562 | .ctl_name = NET_IPV4_VS_EXPIRE_QUIESCENT_TEMPLATE, | |
1563 | .procname = "expire_quiescent_template", | |
1564 | .data = &sysctl_ip_vs_expire_quiescent_template, | |
1565 | .maxlen = sizeof(int), | |
1566 | .mode = 0644, | |
1567 | .proc_handler = &proc_dointvec, | |
1568 | }, | |
1569 | { | |
1570 | .ctl_name = NET_IPV4_VS_SYNC_THRESHOLD, | |
1571 | .procname = "sync_threshold", | |
1572 | .data = &sysctl_ip_vs_sync_threshold, | |
1573 | .maxlen = sizeof(sysctl_ip_vs_sync_threshold), | |
1574 | .mode = 0644, | |
1575 | .proc_handler = &proc_do_sync_threshold, | |
1576 | }, | |
1577 | { | |
1578 | .ctl_name = NET_IPV4_VS_NAT_ICMP_SEND, | |
1579 | .procname = "nat_icmp_send", | |
1580 | .data = &sysctl_ip_vs_nat_icmp_send, | |
1581 | .maxlen = sizeof(int), | |
1582 | .mode = 0644, | |
1583 | .proc_handler = &proc_dointvec, | |
1584 | }, | |
1585 | { .ctl_name = 0 } | |
1586 | }; | |
1587 | ||
1588 | static ctl_table vs_table[] = { | |
1589 | { | |
1590 | .ctl_name = NET_IPV4_VS, | |
1591 | .procname = "vs", | |
1592 | .mode = 0555, | |
1593 | .child = vs_vars | |
1594 | }, | |
1595 | { .ctl_name = 0 } | |
1596 | }; | |
1597 | ||
1598 | static ctl_table ipv4_table[] = { | |
1599 | { | |
1600 | .ctl_name = NET_IPV4, | |
1601 | .procname = "ipv4", | |
1602 | .mode = 0555, | |
1603 | .child = vs_table, | |
1604 | }, | |
1605 | { .ctl_name = 0 } | |
1606 | }; | |
1607 | ||
1608 | static ctl_table vs_root_table[] = { | |
1609 | { | |
1610 | .ctl_name = CTL_NET, | |
1611 | .procname = "net", | |
1612 | .mode = 0555, | |
1613 | .child = ipv4_table, | |
1614 | }, | |
1615 | { .ctl_name = 0 } | |
1616 | }; | |
1617 | ||
1618 | static struct ctl_table_header * sysctl_header; | |
1619 | ||
1620 | #ifdef CONFIG_PROC_FS | |
1621 | ||
1622 | struct ip_vs_iter { | |
1623 | struct list_head *table; | |
1624 | int bucket; | |
1625 | }; | |
1626 | ||
1627 | /* | |
1628 | * Write the contents of the VS rule table to a PROCfs file. | |
1629 | * (It is kept just for backward compatibility) | |
1630 | */ | |
1631 | static inline const char *ip_vs_fwd_name(unsigned flags) | |
1632 | { | |
1633 | switch (flags & IP_VS_CONN_F_FWD_MASK) { | |
1634 | case IP_VS_CONN_F_LOCALNODE: | |
1635 | return "Local"; | |
1636 | case IP_VS_CONN_F_TUNNEL: | |
1637 | return "Tunnel"; | |
1638 | case IP_VS_CONN_F_DROUTE: | |
1639 | return "Route"; | |
1640 | default: | |
1641 | return "Masq"; | |
1642 | } | |
1643 | } | |
1644 | ||
1645 | ||
1646 | /* Get the Nth entry in the two lists */ | |
1647 | static struct ip_vs_service *ip_vs_info_array(struct seq_file *seq, loff_t pos) | |
1648 | { | |
1649 | struct ip_vs_iter *iter = seq->private; | |
1650 | int idx; | |
1651 | struct ip_vs_service *svc; | |
1652 | ||
1653 | /* look in hash by protocol */ | |
1654 | for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
1655 | list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) { | |
1656 | if (pos-- == 0){ | |
1657 | iter->table = ip_vs_svc_table; | |
1658 | iter->bucket = idx; | |
1659 | return svc; | |
1660 | } | |
1661 | } | |
1662 | } | |
1663 | ||
1664 | /* keep looking in fwmark */ | |
1665 | for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
1666 | list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) { | |
1667 | if (pos-- == 0) { | |
1668 | iter->table = ip_vs_svc_fwm_table; | |
1669 | iter->bucket = idx; | |
1670 | return svc; | |
1671 | } | |
1672 | } | |
1673 | } | |
1674 | ||
1675 | return NULL; | |
1676 | } | |
1677 | ||
1678 | static void *ip_vs_info_seq_start(struct seq_file *seq, loff_t *pos) | |
1679 | { | |
1680 | ||
1681 | read_lock_bh(&__ip_vs_svc_lock); | |
1682 | return *pos ? ip_vs_info_array(seq, *pos - 1) : SEQ_START_TOKEN; | |
1683 | } | |
1684 | ||
1685 | ||
1686 | static void *ip_vs_info_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1687 | { | |
1688 | struct list_head *e; | |
1689 | struct ip_vs_iter *iter; | |
1690 | struct ip_vs_service *svc; | |
1691 | ||
1692 | ++*pos; | |
1693 | if (v == SEQ_START_TOKEN) | |
1694 | return ip_vs_info_array(seq,0); | |
1695 | ||
1696 | svc = v; | |
1697 | iter = seq->private; | |
1698 | ||
1699 | if (iter->table == ip_vs_svc_table) { | |
1700 | /* next service in table hashed by protocol */ | |
1701 | if ((e = svc->s_list.next) != &ip_vs_svc_table[iter->bucket]) | |
1702 | return list_entry(e, struct ip_vs_service, s_list); | |
1703 | ||
1704 | ||
1705 | while (++iter->bucket < IP_VS_SVC_TAB_SIZE) { | |
1706 | list_for_each_entry(svc,&ip_vs_svc_table[iter->bucket], | |
1707 | s_list) { | |
1708 | return svc; | |
1709 | } | |
1710 | } | |
1711 | ||
1712 | iter->table = ip_vs_svc_fwm_table; | |
1713 | iter->bucket = -1; | |
1714 | goto scan_fwmark; | |
1715 | } | |
1716 | ||
1717 | /* next service in hashed by fwmark */ | |
1718 | if ((e = svc->f_list.next) != &ip_vs_svc_fwm_table[iter->bucket]) | |
1719 | return list_entry(e, struct ip_vs_service, f_list); | |
1720 | ||
1721 | scan_fwmark: | |
1722 | while (++iter->bucket < IP_VS_SVC_TAB_SIZE) { | |
1723 | list_for_each_entry(svc, &ip_vs_svc_fwm_table[iter->bucket], | |
1724 | f_list) | |
1725 | return svc; | |
1726 | } | |
1727 | ||
1728 | return NULL; | |
1729 | } | |
1730 | ||
1731 | static void ip_vs_info_seq_stop(struct seq_file *seq, void *v) | |
1732 | { | |
1733 | read_unlock_bh(&__ip_vs_svc_lock); | |
1734 | } | |
1735 | ||
1736 | ||
1737 | static int ip_vs_info_seq_show(struct seq_file *seq, void *v) | |
1738 | { | |
1739 | if (v == SEQ_START_TOKEN) { | |
1740 | seq_printf(seq, | |
1741 | "IP Virtual Server version %d.%d.%d (size=%d)\n", | |
1742 | NVERSION(IP_VS_VERSION_CODE), IP_VS_CONN_TAB_SIZE); | |
1743 | seq_puts(seq, | |
1744 | "Prot LocalAddress:Port Scheduler Flags\n"); | |
1745 | seq_puts(seq, | |
1746 | " -> RemoteAddress:Port Forward Weight ActiveConn InActConn\n"); | |
1747 | } else { | |
1748 | const struct ip_vs_service *svc = v; | |
1749 | const struct ip_vs_iter *iter = seq->private; | |
1750 | const struct ip_vs_dest *dest; | |
1751 | ||
1752 | if (iter->table == ip_vs_svc_table) | |
1753 | seq_printf(seq, "%s %08X:%04X %s ", | |
1754 | ip_vs_proto_name(svc->protocol), | |
1755 | ntohl(svc->addr), | |
1756 | ntohs(svc->port), | |
1757 | svc->scheduler->name); | |
1758 | else | |
1759 | seq_printf(seq, "FWM %08X %s ", | |
1760 | svc->fwmark, svc->scheduler->name); | |
1761 | ||
1762 | if (svc->flags & IP_VS_SVC_F_PERSISTENT) | |
1763 | seq_printf(seq, "persistent %d %08X\n", | |
1764 | svc->timeout, | |
1765 | ntohl(svc->netmask)); | |
1766 | else | |
1767 | seq_putc(seq, '\n'); | |
1768 | ||
1769 | list_for_each_entry(dest, &svc->destinations, n_list) { | |
1770 | seq_printf(seq, | |
1771 | " -> %08X:%04X %-7s %-6d %-10d %-10d\n", | |
1772 | ntohl(dest->addr), ntohs(dest->port), | |
1773 | ip_vs_fwd_name(atomic_read(&dest->conn_flags)), | |
1774 | atomic_read(&dest->weight), | |
1775 | atomic_read(&dest->activeconns), | |
1776 | atomic_read(&dest->inactconns)); | |
1777 | } | |
1778 | } | |
1779 | return 0; | |
1780 | } | |
1781 | ||
1782 | static struct seq_operations ip_vs_info_seq_ops = { | |
1783 | .start = ip_vs_info_seq_start, | |
1784 | .next = ip_vs_info_seq_next, | |
1785 | .stop = ip_vs_info_seq_stop, | |
1786 | .show = ip_vs_info_seq_show, | |
1787 | }; | |
1788 | ||
1789 | static int ip_vs_info_open(struct inode *inode, struct file *file) | |
1790 | { | |
1791 | struct seq_file *seq; | |
1792 | int rc = -ENOMEM; | |
1793 | struct ip_vs_iter *s = kmalloc(sizeof(*s), GFP_KERNEL); | |
1794 | ||
1795 | if (!s) | |
1796 | goto out; | |
1797 | ||
1798 | rc = seq_open(file, &ip_vs_info_seq_ops); | |
1799 | if (rc) | |
1800 | goto out_kfree; | |
1801 | ||
1802 | seq = file->private_data; | |
1803 | seq->private = s; | |
1804 | memset(s, 0, sizeof(*s)); | |
1805 | out: | |
1806 | return rc; | |
1807 | out_kfree: | |
1808 | kfree(s); | |
1809 | goto out; | |
1810 | } | |
1811 | ||
1812 | static struct file_operations ip_vs_info_fops = { | |
1813 | .owner = THIS_MODULE, | |
1814 | .open = ip_vs_info_open, | |
1815 | .read = seq_read, | |
1816 | .llseek = seq_lseek, | |
1817 | .release = seq_release_private, | |
1818 | }; | |
1819 | ||
1820 | #endif | |
1821 | ||
1822 | struct ip_vs_stats ip_vs_stats; | |
1823 | ||
1824 | #ifdef CONFIG_PROC_FS | |
1825 | static int ip_vs_stats_show(struct seq_file *seq, void *v) | |
1826 | { | |
1827 | ||
1828 | /* 01234567 01234567 01234567 0123456701234567 0123456701234567 */ | |
1829 | seq_puts(seq, | |
1830 | " Total Incoming Outgoing Incoming Outgoing\n"); | |
1831 | seq_printf(seq, | |
1832 | " Conns Packets Packets Bytes Bytes\n"); | |
1833 | ||
1834 | spin_lock_bh(&ip_vs_stats.lock); | |
1835 | seq_printf(seq, "%8X %8X %8X %16LX %16LX\n\n", ip_vs_stats.conns, | |
1836 | ip_vs_stats.inpkts, ip_vs_stats.outpkts, | |
1837 | (unsigned long long) ip_vs_stats.inbytes, | |
1838 | (unsigned long long) ip_vs_stats.outbytes); | |
1839 | ||
1840 | /* 01234567 01234567 01234567 0123456701234567 0123456701234567 */ | |
1841 | seq_puts(seq, | |
1842 | " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n"); | |
1843 | seq_printf(seq,"%8X %8X %8X %16X %16X\n", | |
1844 | ip_vs_stats.cps, | |
1845 | ip_vs_stats.inpps, | |
1846 | ip_vs_stats.outpps, | |
1847 | ip_vs_stats.inbps, | |
1848 | ip_vs_stats.outbps); | |
1849 | spin_unlock_bh(&ip_vs_stats.lock); | |
1850 | ||
1851 | return 0; | |
1852 | } | |
1853 | ||
1854 | static int ip_vs_stats_seq_open(struct inode *inode, struct file *file) | |
1855 | { | |
1856 | return single_open(file, ip_vs_stats_show, NULL); | |
1857 | } | |
1858 | ||
1859 | static struct file_operations ip_vs_stats_fops = { | |
1860 | .owner = THIS_MODULE, | |
1861 | .open = ip_vs_stats_seq_open, | |
1862 | .read = seq_read, | |
1863 | .llseek = seq_lseek, | |
1864 | .release = single_release, | |
1865 | }; | |
1866 | ||
1867 | #endif | |
1868 | ||
1869 | /* | |
1870 | * Set timeout values for tcp tcpfin udp in the timeout_table. | |
1871 | */ | |
1872 | static int ip_vs_set_timeout(struct ip_vs_timeout_user *u) | |
1873 | { | |
1874 | IP_VS_DBG(2, "Setting timeout tcp:%d tcpfin:%d udp:%d\n", | |
1875 | u->tcp_timeout, | |
1876 | u->tcp_fin_timeout, | |
1877 | u->udp_timeout); | |
1878 | ||
1879 | #ifdef CONFIG_IP_VS_PROTO_TCP | |
1880 | if (u->tcp_timeout) { | |
1881 | ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_ESTABLISHED] | |
1882 | = u->tcp_timeout * HZ; | |
1883 | } | |
1884 | ||
1885 | if (u->tcp_fin_timeout) { | |
1886 | ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_FIN_WAIT] | |
1887 | = u->tcp_fin_timeout * HZ; | |
1888 | } | |
1889 | #endif | |
1890 | ||
1891 | #ifdef CONFIG_IP_VS_PROTO_UDP | |
1892 | if (u->udp_timeout) { | |
1893 | ip_vs_protocol_udp.timeout_table[IP_VS_UDP_S_NORMAL] | |
1894 | = u->udp_timeout * HZ; | |
1895 | } | |
1896 | #endif | |
1897 | return 0; | |
1898 | } | |
1899 | ||
1900 | ||
1901 | #define SET_CMDID(cmd) (cmd - IP_VS_BASE_CTL) | |
1902 | #define SERVICE_ARG_LEN (sizeof(struct ip_vs_service_user)) | |
1903 | #define SVCDEST_ARG_LEN (sizeof(struct ip_vs_service_user) + \ | |
1904 | sizeof(struct ip_vs_dest_user)) | |
1905 | #define TIMEOUT_ARG_LEN (sizeof(struct ip_vs_timeout_user)) | |
1906 | #define DAEMON_ARG_LEN (sizeof(struct ip_vs_daemon_user)) | |
1907 | #define MAX_ARG_LEN SVCDEST_ARG_LEN | |
1908 | ||
1909 | static unsigned char set_arglen[SET_CMDID(IP_VS_SO_SET_MAX)+1] = { | |
1910 | [SET_CMDID(IP_VS_SO_SET_ADD)] = SERVICE_ARG_LEN, | |
1911 | [SET_CMDID(IP_VS_SO_SET_EDIT)] = SERVICE_ARG_LEN, | |
1912 | [SET_CMDID(IP_VS_SO_SET_DEL)] = SERVICE_ARG_LEN, | |
1913 | [SET_CMDID(IP_VS_SO_SET_FLUSH)] = 0, | |
1914 | [SET_CMDID(IP_VS_SO_SET_ADDDEST)] = SVCDEST_ARG_LEN, | |
1915 | [SET_CMDID(IP_VS_SO_SET_DELDEST)] = SVCDEST_ARG_LEN, | |
1916 | [SET_CMDID(IP_VS_SO_SET_EDITDEST)] = SVCDEST_ARG_LEN, | |
1917 | [SET_CMDID(IP_VS_SO_SET_TIMEOUT)] = TIMEOUT_ARG_LEN, | |
1918 | [SET_CMDID(IP_VS_SO_SET_STARTDAEMON)] = DAEMON_ARG_LEN, | |
1919 | [SET_CMDID(IP_VS_SO_SET_STOPDAEMON)] = DAEMON_ARG_LEN, | |
1920 | [SET_CMDID(IP_VS_SO_SET_ZERO)] = SERVICE_ARG_LEN, | |
1921 | }; | |
1922 | ||
1923 | static int | |
1924 | do_ip_vs_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len) | |
1925 | { | |
1926 | int ret; | |
1927 | unsigned char arg[MAX_ARG_LEN]; | |
1928 | struct ip_vs_service_user *usvc; | |
1929 | struct ip_vs_service *svc; | |
1930 | struct ip_vs_dest_user *udest; | |
1931 | ||
1932 | if (!capable(CAP_NET_ADMIN)) | |
1933 | return -EPERM; | |
1934 | ||
1935 | if (len != set_arglen[SET_CMDID(cmd)]) { | |
1936 | IP_VS_ERR("set_ctl: len %u != %u\n", | |
1937 | len, set_arglen[SET_CMDID(cmd)]); | |
1938 | return -EINVAL; | |
1939 | } | |
1940 | ||
1941 | if (copy_from_user(arg, user, len) != 0) | |
1942 | return -EFAULT; | |
1943 | ||
1944 | /* increase the module use count */ | |
1945 | ip_vs_use_count_inc(); | |
1946 | ||
1947 | if (down_interruptible(&__ip_vs_mutex)) { | |
1948 | ret = -ERESTARTSYS; | |
1949 | goto out_dec; | |
1950 | } | |
1951 | ||
1952 | if (cmd == IP_VS_SO_SET_FLUSH) { | |
1953 | /* Flush the virtual service */ | |
1954 | ret = ip_vs_flush(); | |
1955 | goto out_unlock; | |
1956 | } else if (cmd == IP_VS_SO_SET_TIMEOUT) { | |
1957 | /* Set timeout values for (tcp tcpfin udp) */ | |
1958 | ret = ip_vs_set_timeout((struct ip_vs_timeout_user *)arg); | |
1959 | goto out_unlock; | |
1960 | } else if (cmd == IP_VS_SO_SET_STARTDAEMON) { | |
1961 | struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg; | |
1962 | ret = start_sync_thread(dm->state, dm->mcast_ifn, dm->syncid); | |
1963 | goto out_unlock; | |
1964 | } else if (cmd == IP_VS_SO_SET_STOPDAEMON) { | |
1965 | struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg; | |
1966 | ret = stop_sync_thread(dm->state); | |
1967 | goto out_unlock; | |
1968 | } | |
1969 | ||
1970 | usvc = (struct ip_vs_service_user *)arg; | |
1971 | udest = (struct ip_vs_dest_user *)(usvc + 1); | |
1972 | ||
1973 | if (cmd == IP_VS_SO_SET_ZERO) { | |
1974 | /* if no service address is set, zero counters in all */ | |
1975 | if (!usvc->fwmark && !usvc->addr && !usvc->port) { | |
1976 | ret = ip_vs_zero_all(); | |
1977 | goto out_unlock; | |
1978 | } | |
1979 | } | |
1980 | ||
1981 | /* Check for valid protocol: TCP or UDP, even for fwmark!=0 */ | |
1982 | if (usvc->protocol!=IPPROTO_TCP && usvc->protocol!=IPPROTO_UDP) { | |
1983 | IP_VS_ERR("set_ctl: invalid protocol: %d %d.%d.%d.%d:%d %s\n", | |
1984 | usvc->protocol, NIPQUAD(usvc->addr), | |
1985 | ntohs(usvc->port), usvc->sched_name); | |
1986 | ret = -EFAULT; | |
1987 | goto out_unlock; | |
1988 | } | |
1989 | ||
1990 | /* Lookup the exact service by <protocol, addr, port> or fwmark */ | |
1991 | if (usvc->fwmark == 0) | |
1992 | svc = __ip_vs_service_get(usvc->protocol, | |
1993 | usvc->addr, usvc->port); | |
1994 | else | |
1995 | svc = __ip_vs_svc_fwm_get(usvc->fwmark); | |
1996 | ||
1997 | if (cmd != IP_VS_SO_SET_ADD | |
1998 | && (svc == NULL || svc->protocol != usvc->protocol)) { | |
1999 | ret = -ESRCH; | |
2000 | goto out_unlock; | |
2001 | } | |
2002 | ||
2003 | switch (cmd) { | |
2004 | case IP_VS_SO_SET_ADD: | |
2005 | if (svc != NULL) | |
2006 | ret = -EEXIST; | |
2007 | else | |
2008 | ret = ip_vs_add_service(usvc, &svc); | |
2009 | break; | |
2010 | case IP_VS_SO_SET_EDIT: | |
2011 | ret = ip_vs_edit_service(svc, usvc); | |
2012 | break; | |
2013 | case IP_VS_SO_SET_DEL: | |
2014 | ret = ip_vs_del_service(svc); | |
2015 | if (!ret) | |
2016 | goto out_unlock; | |
2017 | break; | |
2018 | case IP_VS_SO_SET_ZERO: | |
2019 | ret = ip_vs_zero_service(svc); | |
2020 | break; | |
2021 | case IP_VS_SO_SET_ADDDEST: | |
2022 | ret = ip_vs_add_dest(svc, udest); | |
2023 | break; | |
2024 | case IP_VS_SO_SET_EDITDEST: | |
2025 | ret = ip_vs_edit_dest(svc, udest); | |
2026 | break; | |
2027 | case IP_VS_SO_SET_DELDEST: | |
2028 | ret = ip_vs_del_dest(svc, udest); | |
2029 | break; | |
2030 | default: | |
2031 | ret = -EINVAL; | |
2032 | } | |
2033 | ||
2034 | if (svc) | |
2035 | ip_vs_service_put(svc); | |
2036 | ||
2037 | out_unlock: | |
2038 | up(&__ip_vs_mutex); | |
2039 | out_dec: | |
2040 | /* decrease the module use count */ | |
2041 | ip_vs_use_count_dec(); | |
2042 | ||
2043 | return ret; | |
2044 | } | |
2045 | ||
2046 | ||
2047 | static void | |
2048 | ip_vs_copy_stats(struct ip_vs_stats_user *dst, struct ip_vs_stats *src) | |
2049 | { | |
2050 | spin_lock_bh(&src->lock); | |
2051 | memcpy(dst, src, (char*)&src->lock - (char*)src); | |
2052 | spin_unlock_bh(&src->lock); | |
2053 | } | |
2054 | ||
2055 | static void | |
2056 | ip_vs_copy_service(struct ip_vs_service_entry *dst, struct ip_vs_service *src) | |
2057 | { | |
2058 | dst->protocol = src->protocol; | |
2059 | dst->addr = src->addr; | |
2060 | dst->port = src->port; | |
2061 | dst->fwmark = src->fwmark; | |
4da62fc7 | 2062 | strlcpy(dst->sched_name, src->scheduler->name, sizeof(dst->sched_name)); |
1da177e4 LT |
2063 | dst->flags = src->flags; |
2064 | dst->timeout = src->timeout / HZ; | |
2065 | dst->netmask = src->netmask; | |
2066 | dst->num_dests = src->num_dests; | |
2067 | ip_vs_copy_stats(&dst->stats, &src->stats); | |
2068 | } | |
2069 | ||
2070 | static inline int | |
2071 | __ip_vs_get_service_entries(const struct ip_vs_get_services *get, | |
2072 | struct ip_vs_get_services __user *uptr) | |
2073 | { | |
2074 | int idx, count=0; | |
2075 | struct ip_vs_service *svc; | |
2076 | struct ip_vs_service_entry entry; | |
2077 | int ret = 0; | |
2078 | ||
2079 | for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
2080 | list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) { | |
2081 | if (count >= get->num_services) | |
2082 | goto out; | |
4da62fc7 | 2083 | memset(&entry, 0, sizeof(entry)); |
1da177e4 LT |
2084 | ip_vs_copy_service(&entry, svc); |
2085 | if (copy_to_user(&uptr->entrytable[count], | |
2086 | &entry, sizeof(entry))) { | |
2087 | ret = -EFAULT; | |
2088 | goto out; | |
2089 | } | |
2090 | count++; | |
2091 | } | |
2092 | } | |
2093 | ||
2094 | for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
2095 | list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) { | |
2096 | if (count >= get->num_services) | |
2097 | goto out; | |
4da62fc7 | 2098 | memset(&entry, 0, sizeof(entry)); |
1da177e4 LT |
2099 | ip_vs_copy_service(&entry, svc); |
2100 | if (copy_to_user(&uptr->entrytable[count], | |
2101 | &entry, sizeof(entry))) { | |
2102 | ret = -EFAULT; | |
2103 | goto out; | |
2104 | } | |
2105 | count++; | |
2106 | } | |
2107 | } | |
2108 | out: | |
2109 | return ret; | |
2110 | } | |
2111 | ||
2112 | static inline int | |
2113 | __ip_vs_get_dest_entries(const struct ip_vs_get_dests *get, | |
2114 | struct ip_vs_get_dests __user *uptr) | |
2115 | { | |
2116 | struct ip_vs_service *svc; | |
2117 | int ret = 0; | |
2118 | ||
2119 | if (get->fwmark) | |
2120 | svc = __ip_vs_svc_fwm_get(get->fwmark); | |
2121 | else | |
2122 | svc = __ip_vs_service_get(get->protocol, | |
2123 | get->addr, get->port); | |
2124 | if (svc) { | |
2125 | int count = 0; | |
2126 | struct ip_vs_dest *dest; | |
2127 | struct ip_vs_dest_entry entry; | |
2128 | ||
2129 | list_for_each_entry(dest, &svc->destinations, n_list) { | |
2130 | if (count >= get->num_dests) | |
2131 | break; | |
2132 | ||
2133 | entry.addr = dest->addr; | |
2134 | entry.port = dest->port; | |
2135 | entry.conn_flags = atomic_read(&dest->conn_flags); | |
2136 | entry.weight = atomic_read(&dest->weight); | |
2137 | entry.u_threshold = dest->u_threshold; | |
2138 | entry.l_threshold = dest->l_threshold; | |
2139 | entry.activeconns = atomic_read(&dest->activeconns); | |
2140 | entry.inactconns = atomic_read(&dest->inactconns); | |
2141 | entry.persistconns = atomic_read(&dest->persistconns); | |
2142 | ip_vs_copy_stats(&entry.stats, &dest->stats); | |
2143 | if (copy_to_user(&uptr->entrytable[count], | |
2144 | &entry, sizeof(entry))) { | |
2145 | ret = -EFAULT; | |
2146 | break; | |
2147 | } | |
2148 | count++; | |
2149 | } | |
2150 | ip_vs_service_put(svc); | |
2151 | } else | |
2152 | ret = -ESRCH; | |
2153 | return ret; | |
2154 | } | |
2155 | ||
2156 | static inline void | |
2157 | __ip_vs_get_timeouts(struct ip_vs_timeout_user *u) | |
2158 | { | |
2159 | #ifdef CONFIG_IP_VS_PROTO_TCP | |
2160 | u->tcp_timeout = | |
2161 | ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_ESTABLISHED] / HZ; | |
2162 | u->tcp_fin_timeout = | |
2163 | ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_FIN_WAIT] / HZ; | |
2164 | #endif | |
2165 | #ifdef CONFIG_IP_VS_PROTO_UDP | |
2166 | u->udp_timeout = | |
2167 | ip_vs_protocol_udp.timeout_table[IP_VS_UDP_S_NORMAL] / HZ; | |
2168 | #endif | |
2169 | } | |
2170 | ||
2171 | ||
2172 | #define GET_CMDID(cmd) (cmd - IP_VS_BASE_CTL) | |
2173 | #define GET_INFO_ARG_LEN (sizeof(struct ip_vs_getinfo)) | |
2174 | #define GET_SERVICES_ARG_LEN (sizeof(struct ip_vs_get_services)) | |
2175 | #define GET_SERVICE_ARG_LEN (sizeof(struct ip_vs_service_entry)) | |
2176 | #define GET_DESTS_ARG_LEN (sizeof(struct ip_vs_get_dests)) | |
2177 | #define GET_TIMEOUT_ARG_LEN (sizeof(struct ip_vs_timeout_user)) | |
2178 | #define GET_DAEMON_ARG_LEN (sizeof(struct ip_vs_daemon_user) * 2) | |
2179 | ||
2180 | static unsigned char get_arglen[GET_CMDID(IP_VS_SO_GET_MAX)+1] = { | |
2181 | [GET_CMDID(IP_VS_SO_GET_VERSION)] = 64, | |
2182 | [GET_CMDID(IP_VS_SO_GET_INFO)] = GET_INFO_ARG_LEN, | |
2183 | [GET_CMDID(IP_VS_SO_GET_SERVICES)] = GET_SERVICES_ARG_LEN, | |
2184 | [GET_CMDID(IP_VS_SO_GET_SERVICE)] = GET_SERVICE_ARG_LEN, | |
2185 | [GET_CMDID(IP_VS_SO_GET_DESTS)] = GET_DESTS_ARG_LEN, | |
2186 | [GET_CMDID(IP_VS_SO_GET_TIMEOUT)] = GET_TIMEOUT_ARG_LEN, | |
2187 | [GET_CMDID(IP_VS_SO_GET_DAEMON)] = GET_DAEMON_ARG_LEN, | |
2188 | }; | |
2189 | ||
2190 | static int | |
2191 | do_ip_vs_get_ctl(struct sock *sk, int cmd, void __user *user, int *len) | |
2192 | { | |
2193 | unsigned char arg[128]; | |
2194 | int ret = 0; | |
2195 | ||
2196 | if (!capable(CAP_NET_ADMIN)) | |
2197 | return -EPERM; | |
2198 | ||
2199 | if (*len < get_arglen[GET_CMDID(cmd)]) { | |
2200 | IP_VS_ERR("get_ctl: len %u < %u\n", | |
2201 | *len, get_arglen[GET_CMDID(cmd)]); | |
2202 | return -EINVAL; | |
2203 | } | |
2204 | ||
2205 | if (copy_from_user(arg, user, get_arglen[GET_CMDID(cmd)]) != 0) | |
2206 | return -EFAULT; | |
2207 | ||
2208 | if (down_interruptible(&__ip_vs_mutex)) | |
2209 | return -ERESTARTSYS; | |
2210 | ||
2211 | switch (cmd) { | |
2212 | case IP_VS_SO_GET_VERSION: | |
2213 | { | |
2214 | char buf[64]; | |
2215 | ||
2216 | sprintf(buf, "IP Virtual Server version %d.%d.%d (size=%d)", | |
2217 | NVERSION(IP_VS_VERSION_CODE), IP_VS_CONN_TAB_SIZE); | |
2218 | if (copy_to_user(user, buf, strlen(buf)+1) != 0) { | |
2219 | ret = -EFAULT; | |
2220 | goto out; | |
2221 | } | |
2222 | *len = strlen(buf)+1; | |
2223 | } | |
2224 | break; | |
2225 | ||
2226 | case IP_VS_SO_GET_INFO: | |
2227 | { | |
2228 | struct ip_vs_getinfo info; | |
2229 | info.version = IP_VS_VERSION_CODE; | |
2230 | info.size = IP_VS_CONN_TAB_SIZE; | |
2231 | info.num_services = ip_vs_num_services; | |
2232 | if (copy_to_user(user, &info, sizeof(info)) != 0) | |
2233 | ret = -EFAULT; | |
2234 | } | |
2235 | break; | |
2236 | ||
2237 | case IP_VS_SO_GET_SERVICES: | |
2238 | { | |
2239 | struct ip_vs_get_services *get; | |
2240 | int size; | |
2241 | ||
2242 | get = (struct ip_vs_get_services *)arg; | |
2243 | size = sizeof(*get) + | |
2244 | sizeof(struct ip_vs_service_entry) * get->num_services; | |
2245 | if (*len != size) { | |
2246 | IP_VS_ERR("length: %u != %u\n", *len, size); | |
2247 | ret = -EINVAL; | |
2248 | goto out; | |
2249 | } | |
2250 | ret = __ip_vs_get_service_entries(get, user); | |
2251 | } | |
2252 | break; | |
2253 | ||
2254 | case IP_VS_SO_GET_SERVICE: | |
2255 | { | |
2256 | struct ip_vs_service_entry *entry; | |
2257 | struct ip_vs_service *svc; | |
2258 | ||
2259 | entry = (struct ip_vs_service_entry *)arg; | |
2260 | if (entry->fwmark) | |
2261 | svc = __ip_vs_svc_fwm_get(entry->fwmark); | |
2262 | else | |
2263 | svc = __ip_vs_service_get(entry->protocol, | |
2264 | entry->addr, entry->port); | |
2265 | if (svc) { | |
2266 | ip_vs_copy_service(entry, svc); | |
2267 | if (copy_to_user(user, entry, sizeof(*entry)) != 0) | |
2268 | ret = -EFAULT; | |
2269 | ip_vs_service_put(svc); | |
2270 | } else | |
2271 | ret = -ESRCH; | |
2272 | } | |
2273 | break; | |
2274 | ||
2275 | case IP_VS_SO_GET_DESTS: | |
2276 | { | |
2277 | struct ip_vs_get_dests *get; | |
2278 | int size; | |
2279 | ||
2280 | get = (struct ip_vs_get_dests *)arg; | |
2281 | size = sizeof(*get) + | |
2282 | sizeof(struct ip_vs_dest_entry) * get->num_dests; | |
2283 | if (*len != size) { | |
2284 | IP_VS_ERR("length: %u != %u\n", *len, size); | |
2285 | ret = -EINVAL; | |
2286 | goto out; | |
2287 | } | |
2288 | ret = __ip_vs_get_dest_entries(get, user); | |
2289 | } | |
2290 | break; | |
2291 | ||
2292 | case IP_VS_SO_GET_TIMEOUT: | |
2293 | { | |
2294 | struct ip_vs_timeout_user t; | |
2295 | ||
2296 | __ip_vs_get_timeouts(&t); | |
2297 | if (copy_to_user(user, &t, sizeof(t)) != 0) | |
2298 | ret = -EFAULT; | |
2299 | } | |
2300 | break; | |
2301 | ||
2302 | case IP_VS_SO_GET_DAEMON: | |
2303 | { | |
2304 | struct ip_vs_daemon_user d[2]; | |
2305 | ||
2306 | memset(&d, 0, sizeof(d)); | |
2307 | if (ip_vs_sync_state & IP_VS_STATE_MASTER) { | |
2308 | d[0].state = IP_VS_STATE_MASTER; | |
4da62fc7 | 2309 | strlcpy(d[0].mcast_ifn, ip_vs_master_mcast_ifn, sizeof(d[0].mcast_ifn)); |
1da177e4 LT |
2310 | d[0].syncid = ip_vs_master_syncid; |
2311 | } | |
2312 | if (ip_vs_sync_state & IP_VS_STATE_BACKUP) { | |
2313 | d[1].state = IP_VS_STATE_BACKUP; | |
4da62fc7 | 2314 | strlcpy(d[1].mcast_ifn, ip_vs_backup_mcast_ifn, sizeof(d[1].mcast_ifn)); |
1da177e4 LT |
2315 | d[1].syncid = ip_vs_backup_syncid; |
2316 | } | |
2317 | if (copy_to_user(user, &d, sizeof(d)) != 0) | |
2318 | ret = -EFAULT; | |
2319 | } | |
2320 | break; | |
2321 | ||
2322 | default: | |
2323 | ret = -EINVAL; | |
2324 | } | |
2325 | ||
2326 | out: | |
2327 | up(&__ip_vs_mutex); | |
2328 | return ret; | |
2329 | } | |
2330 | ||
2331 | ||
2332 | static struct nf_sockopt_ops ip_vs_sockopts = { | |
2333 | .pf = PF_INET, | |
2334 | .set_optmin = IP_VS_BASE_CTL, | |
2335 | .set_optmax = IP_VS_SO_SET_MAX+1, | |
2336 | .set = do_ip_vs_set_ctl, | |
2337 | .get_optmin = IP_VS_BASE_CTL, | |
2338 | .get_optmax = IP_VS_SO_GET_MAX+1, | |
2339 | .get = do_ip_vs_get_ctl, | |
2340 | }; | |
2341 | ||
2342 | ||
2343 | int ip_vs_control_init(void) | |
2344 | { | |
2345 | int ret; | |
2346 | int idx; | |
2347 | ||
2348 | EnterFunction(2); | |
2349 | ||
2350 | ret = nf_register_sockopt(&ip_vs_sockopts); | |
2351 | if (ret) { | |
2352 | IP_VS_ERR("cannot register sockopt.\n"); | |
2353 | return ret; | |
2354 | } | |
2355 | ||
2356 | proc_net_fops_create("ip_vs", 0, &ip_vs_info_fops); | |
2357 | proc_net_fops_create("ip_vs_stats",0, &ip_vs_stats_fops); | |
2358 | ||
2359 | sysctl_header = register_sysctl_table(vs_root_table, 0); | |
2360 | ||
2361 | /* Initialize ip_vs_svc_table, ip_vs_svc_fwm_table, ip_vs_rtable */ | |
2362 | for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
2363 | INIT_LIST_HEAD(&ip_vs_svc_table[idx]); | |
2364 | INIT_LIST_HEAD(&ip_vs_svc_fwm_table[idx]); | |
2365 | } | |
2366 | for(idx = 0; idx < IP_VS_RTAB_SIZE; idx++) { | |
2367 | INIT_LIST_HEAD(&ip_vs_rtable[idx]); | |
2368 | } | |
2369 | ||
2370 | memset(&ip_vs_stats, 0, sizeof(ip_vs_stats)); | |
2371 | spin_lock_init(&ip_vs_stats.lock); | |
2372 | ip_vs_new_estimator(&ip_vs_stats); | |
2373 | ||
2374 | /* Hook the defense timer */ | |
2375 | schedule_delayed_work(&defense_work, DEFENSE_TIMER_PERIOD); | |
2376 | ||
2377 | LeaveFunction(2); | |
2378 | return 0; | |
2379 | } | |
2380 | ||
2381 | ||
2382 | void ip_vs_control_cleanup(void) | |
2383 | { | |
2384 | EnterFunction(2); | |
2385 | ip_vs_trash_cleanup(); | |
2386 | cancel_rearming_delayed_work(&defense_work); | |
2387 | ip_vs_kill_estimator(&ip_vs_stats); | |
2388 | unregister_sysctl_table(sysctl_header); | |
2389 | proc_net_remove("ip_vs_stats"); | |
2390 | proc_net_remove("ip_vs"); | |
2391 | nf_unregister_sockopt(&ip_vs_sockopts); | |
2392 | LeaveFunction(2); | |
2393 | } |