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 | * | |
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> | |
4fc268d2 | 26 | #include <linux/capability.h> |
1da177e4 LT |
27 | #include <linux/fs.h> |
28 | #include <linux/sysctl.h> | |
29 | #include <linux/proc_fs.h> | |
30 | #include <linux/workqueue.h> | |
31 | #include <linux/swap.h> | |
32 | #include <linux/proc_fs.h> | |
33 | #include <linux/seq_file.h> | |
34 | ||
35 | #include <linux/netfilter.h> | |
36 | #include <linux/netfilter_ipv4.h> | |
14cc3e2b | 37 | #include <linux/mutex.h> |
1da177e4 LT |
38 | |
39 | #include <net/ip.h> | |
14c85021 | 40 | #include <net/route.h> |
1da177e4 LT |
41 | #include <net/sock.h> |
42 | ||
43 | #include <asm/uaccess.h> | |
44 | ||
45 | #include <net/ip_vs.h> | |
46 | ||
47 | /* semaphore for IPVS sockopts. And, [gs]etsockopt may sleep. */ | |
14cc3e2b | 48 | static DEFINE_MUTEX(__ip_vs_mutex); |
1da177e4 LT |
49 | |
50 | /* lock for service table */ | |
51 | static DEFINE_RWLOCK(__ip_vs_svc_lock); | |
52 | ||
53 | /* lock for table with the real services */ | |
54 | static DEFINE_RWLOCK(__ip_vs_rs_lock); | |
55 | ||
56 | /* lock for state and timeout tables */ | |
57 | static DEFINE_RWLOCK(__ip_vs_securetcp_lock); | |
58 | ||
59 | /* lock for drop entry handling */ | |
60 | static DEFINE_SPINLOCK(__ip_vs_dropentry_lock); | |
61 | ||
62 | /* lock for drop packet handling */ | |
63 | static DEFINE_SPINLOCK(__ip_vs_droppacket_lock); | |
64 | ||
65 | /* 1/rate drop and drop-entry variables */ | |
66 | int ip_vs_drop_rate = 0; | |
67 | int ip_vs_drop_counter = 0; | |
68 | static atomic_t ip_vs_dropentry = ATOMIC_INIT(0); | |
69 | ||
70 | /* number of virtual services */ | |
71 | static int ip_vs_num_services = 0; | |
72 | ||
73 | /* sysctl variables */ | |
74 | static int sysctl_ip_vs_drop_entry = 0; | |
75 | static int sysctl_ip_vs_drop_packet = 0; | |
76 | static int sysctl_ip_vs_secure_tcp = 0; | |
77 | static int sysctl_ip_vs_amemthresh = 1024; | |
78 | static int sysctl_ip_vs_am_droprate = 10; | |
79 | int sysctl_ip_vs_cache_bypass = 0; | |
80 | int sysctl_ip_vs_expire_nodest_conn = 0; | |
81 | int sysctl_ip_vs_expire_quiescent_template = 0; | |
82 | int sysctl_ip_vs_sync_threshold[2] = { 3, 50 }; | |
83 | int sysctl_ip_vs_nat_icmp_send = 0; | |
84 | ||
85 | ||
86 | #ifdef CONFIG_IP_VS_DEBUG | |
87 | static int sysctl_ip_vs_debug_level = 0; | |
88 | ||
89 | int ip_vs_get_debug_level(void) | |
90 | { | |
91 | return sysctl_ip_vs_debug_level; | |
92 | } | |
93 | #endif | |
94 | ||
95 | /* | |
af9debd4 JA |
96 | * update_defense_level is called from keventd and from sysctl, |
97 | * so it needs to protect itself from softirqs | |
1da177e4 LT |
98 | */ |
99 | static void update_defense_level(void) | |
100 | { | |
101 | struct sysinfo i; | |
102 | static int old_secure_tcp = 0; | |
103 | int availmem; | |
104 | int nomem; | |
105 | int to_change = -1; | |
106 | ||
107 | /* we only count free and buffered memory (in pages) */ | |
108 | si_meminfo(&i); | |
109 | availmem = i.freeram + i.bufferram; | |
110 | /* however in linux 2.5 the i.bufferram is total page cache size, | |
111 | we need adjust it */ | |
112 | /* si_swapinfo(&i); */ | |
113 | /* availmem = availmem - (i.totalswap - i.freeswap); */ | |
114 | ||
115 | nomem = (availmem < sysctl_ip_vs_amemthresh); | |
116 | ||
af9debd4 JA |
117 | local_bh_disable(); |
118 | ||
1da177e4 LT |
119 | /* drop_entry */ |
120 | spin_lock(&__ip_vs_dropentry_lock); | |
121 | switch (sysctl_ip_vs_drop_entry) { | |
122 | case 0: | |
123 | atomic_set(&ip_vs_dropentry, 0); | |
124 | break; | |
125 | case 1: | |
126 | if (nomem) { | |
127 | atomic_set(&ip_vs_dropentry, 1); | |
128 | sysctl_ip_vs_drop_entry = 2; | |
129 | } else { | |
130 | atomic_set(&ip_vs_dropentry, 0); | |
131 | } | |
132 | break; | |
133 | case 2: | |
134 | if (nomem) { | |
135 | atomic_set(&ip_vs_dropentry, 1); | |
136 | } else { | |
137 | atomic_set(&ip_vs_dropentry, 0); | |
138 | sysctl_ip_vs_drop_entry = 1; | |
139 | }; | |
140 | break; | |
141 | case 3: | |
142 | atomic_set(&ip_vs_dropentry, 1); | |
143 | break; | |
144 | } | |
145 | spin_unlock(&__ip_vs_dropentry_lock); | |
146 | ||
147 | /* drop_packet */ | |
148 | spin_lock(&__ip_vs_droppacket_lock); | |
149 | switch (sysctl_ip_vs_drop_packet) { | |
150 | case 0: | |
151 | ip_vs_drop_rate = 0; | |
152 | break; | |
153 | case 1: | |
154 | if (nomem) { | |
155 | ip_vs_drop_rate = ip_vs_drop_counter | |
156 | = sysctl_ip_vs_amemthresh / | |
157 | (sysctl_ip_vs_amemthresh-availmem); | |
158 | sysctl_ip_vs_drop_packet = 2; | |
159 | } else { | |
160 | ip_vs_drop_rate = 0; | |
161 | } | |
162 | break; | |
163 | case 2: | |
164 | if (nomem) { | |
165 | ip_vs_drop_rate = ip_vs_drop_counter | |
166 | = sysctl_ip_vs_amemthresh / | |
167 | (sysctl_ip_vs_amemthresh-availmem); | |
168 | } else { | |
169 | ip_vs_drop_rate = 0; | |
170 | sysctl_ip_vs_drop_packet = 1; | |
171 | } | |
172 | break; | |
173 | case 3: | |
174 | ip_vs_drop_rate = sysctl_ip_vs_am_droprate; | |
175 | break; | |
176 | } | |
177 | spin_unlock(&__ip_vs_droppacket_lock); | |
178 | ||
179 | /* secure_tcp */ | |
180 | write_lock(&__ip_vs_securetcp_lock); | |
181 | switch (sysctl_ip_vs_secure_tcp) { | |
182 | case 0: | |
183 | if (old_secure_tcp >= 2) | |
184 | to_change = 0; | |
185 | break; | |
186 | case 1: | |
187 | if (nomem) { | |
188 | if (old_secure_tcp < 2) | |
189 | to_change = 1; | |
190 | sysctl_ip_vs_secure_tcp = 2; | |
191 | } else { | |
192 | if (old_secure_tcp >= 2) | |
193 | to_change = 0; | |
194 | } | |
195 | break; | |
196 | case 2: | |
197 | if (nomem) { | |
198 | if (old_secure_tcp < 2) | |
199 | to_change = 1; | |
200 | } else { | |
201 | if (old_secure_tcp >= 2) | |
202 | to_change = 0; | |
203 | sysctl_ip_vs_secure_tcp = 1; | |
204 | } | |
205 | break; | |
206 | case 3: | |
207 | if (old_secure_tcp < 2) | |
208 | to_change = 1; | |
209 | break; | |
210 | } | |
211 | old_secure_tcp = sysctl_ip_vs_secure_tcp; | |
212 | if (to_change >= 0) | |
213 | ip_vs_protocol_timeout_change(sysctl_ip_vs_secure_tcp>1); | |
214 | write_unlock(&__ip_vs_securetcp_lock); | |
af9debd4 JA |
215 | |
216 | local_bh_enable(); | |
1da177e4 LT |
217 | } |
218 | ||
219 | ||
220 | /* | |
221 | * Timer for checking the defense | |
222 | */ | |
223 | #define DEFENSE_TIMER_PERIOD 1*HZ | |
c4028958 DH |
224 | static void defense_work_handler(struct work_struct *work); |
225 | static DECLARE_DELAYED_WORK(defense_work, defense_work_handler); | |
1da177e4 | 226 | |
c4028958 | 227 | static void defense_work_handler(struct work_struct *work) |
1da177e4 LT |
228 | { |
229 | update_defense_level(); | |
230 | if (atomic_read(&ip_vs_dropentry)) | |
231 | ip_vs_random_dropentry(); | |
232 | ||
233 | schedule_delayed_work(&defense_work, DEFENSE_TIMER_PERIOD); | |
234 | } | |
235 | ||
236 | int | |
237 | ip_vs_use_count_inc(void) | |
238 | { | |
239 | return try_module_get(THIS_MODULE); | |
240 | } | |
241 | ||
242 | void | |
243 | ip_vs_use_count_dec(void) | |
244 | { | |
245 | module_put(THIS_MODULE); | |
246 | } | |
247 | ||
248 | ||
249 | /* | |
250 | * Hash table: for virtual service lookups | |
251 | */ | |
252 | #define IP_VS_SVC_TAB_BITS 8 | |
253 | #define IP_VS_SVC_TAB_SIZE (1 << IP_VS_SVC_TAB_BITS) | |
254 | #define IP_VS_SVC_TAB_MASK (IP_VS_SVC_TAB_SIZE - 1) | |
255 | ||
256 | /* the service table hashed by <protocol, addr, port> */ | |
257 | static struct list_head ip_vs_svc_table[IP_VS_SVC_TAB_SIZE]; | |
258 | /* the service table hashed by fwmark */ | |
259 | static struct list_head ip_vs_svc_fwm_table[IP_VS_SVC_TAB_SIZE]; | |
260 | ||
261 | /* | |
262 | * Hash table: for real service lookups | |
263 | */ | |
264 | #define IP_VS_RTAB_BITS 4 | |
265 | #define IP_VS_RTAB_SIZE (1 << IP_VS_RTAB_BITS) | |
266 | #define IP_VS_RTAB_MASK (IP_VS_RTAB_SIZE - 1) | |
267 | ||
268 | static struct list_head ip_vs_rtable[IP_VS_RTAB_SIZE]; | |
269 | ||
270 | /* | |
271 | * Trash for destinations | |
272 | */ | |
273 | static LIST_HEAD(ip_vs_dest_trash); | |
274 | ||
275 | /* | |
276 | * FTP & NULL virtual service counters | |
277 | */ | |
278 | static atomic_t ip_vs_ftpsvc_counter = ATOMIC_INIT(0); | |
279 | static atomic_t ip_vs_nullsvc_counter = ATOMIC_INIT(0); | |
280 | ||
281 | ||
282 | /* | |
283 | * Returns hash value for virtual service | |
284 | */ | |
285 | static __inline__ unsigned | |
014d730d | 286 | ip_vs_svc_hashkey(unsigned proto, __be32 addr, __be16 port) |
1da177e4 LT |
287 | { |
288 | register unsigned porth = ntohs(port); | |
289 | ||
290 | return (proto^ntohl(addr)^(porth>>IP_VS_SVC_TAB_BITS)^porth) | |
291 | & IP_VS_SVC_TAB_MASK; | |
292 | } | |
293 | ||
294 | /* | |
295 | * Returns hash value of fwmark for virtual service lookup | |
296 | */ | |
297 | static __inline__ unsigned ip_vs_svc_fwm_hashkey(__u32 fwmark) | |
298 | { | |
299 | return fwmark & IP_VS_SVC_TAB_MASK; | |
300 | } | |
301 | ||
302 | /* | |
303 | * Hashes a service in the ip_vs_svc_table by <proto,addr,port> | |
304 | * or in the ip_vs_svc_fwm_table by fwmark. | |
305 | * Should be called with locked tables. | |
306 | */ | |
307 | static int ip_vs_svc_hash(struct ip_vs_service *svc) | |
308 | { | |
309 | unsigned hash; | |
310 | ||
311 | if (svc->flags & IP_VS_SVC_F_HASHED) { | |
312 | IP_VS_ERR("ip_vs_svc_hash(): request for already hashed, " | |
313 | "called from %p\n", __builtin_return_address(0)); | |
314 | return 0; | |
315 | } | |
316 | ||
317 | if (svc->fwmark == 0) { | |
318 | /* | |
319 | * Hash it by <protocol,addr,port> in ip_vs_svc_table | |
320 | */ | |
321 | hash = ip_vs_svc_hashkey(svc->protocol, svc->addr, svc->port); | |
322 | list_add(&svc->s_list, &ip_vs_svc_table[hash]); | |
323 | } else { | |
324 | /* | |
325 | * Hash it by fwmark in ip_vs_svc_fwm_table | |
326 | */ | |
327 | hash = ip_vs_svc_fwm_hashkey(svc->fwmark); | |
328 | list_add(&svc->f_list, &ip_vs_svc_fwm_table[hash]); | |
329 | } | |
330 | ||
331 | svc->flags |= IP_VS_SVC_F_HASHED; | |
332 | /* increase its refcnt because it is referenced by the svc table */ | |
333 | atomic_inc(&svc->refcnt); | |
334 | return 1; | |
335 | } | |
336 | ||
337 | ||
338 | /* | |
339 | * Unhashes a service from ip_vs_svc_table/ip_vs_svc_fwm_table. | |
340 | * Should be called with locked tables. | |
341 | */ | |
342 | static int ip_vs_svc_unhash(struct ip_vs_service *svc) | |
343 | { | |
344 | if (!(svc->flags & IP_VS_SVC_F_HASHED)) { | |
345 | IP_VS_ERR("ip_vs_svc_unhash(): request for unhash flagged, " | |
346 | "called from %p\n", __builtin_return_address(0)); | |
347 | return 0; | |
348 | } | |
349 | ||
350 | if (svc->fwmark == 0) { | |
351 | /* Remove it from the ip_vs_svc_table table */ | |
352 | list_del(&svc->s_list); | |
353 | } else { | |
354 | /* Remove it from the ip_vs_svc_fwm_table table */ | |
355 | list_del(&svc->f_list); | |
356 | } | |
357 | ||
358 | svc->flags &= ~IP_VS_SVC_F_HASHED; | |
359 | atomic_dec(&svc->refcnt); | |
360 | return 1; | |
361 | } | |
362 | ||
363 | ||
364 | /* | |
365 | * Get service by {proto,addr,port} in the service table. | |
366 | */ | |
367 | static __inline__ struct ip_vs_service * | |
014d730d | 368 | __ip_vs_service_get(__u16 protocol, __be32 vaddr, __be16 vport) |
1da177e4 LT |
369 | { |
370 | unsigned hash; | |
371 | struct ip_vs_service *svc; | |
372 | ||
373 | /* Check for "full" addressed entries */ | |
374 | hash = ip_vs_svc_hashkey(protocol, vaddr, vport); | |
375 | ||
376 | list_for_each_entry(svc, &ip_vs_svc_table[hash], s_list){ | |
377 | if ((svc->addr == vaddr) | |
378 | && (svc->port == vport) | |
379 | && (svc->protocol == protocol)) { | |
380 | /* HIT */ | |
381 | atomic_inc(&svc->usecnt); | |
382 | return svc; | |
383 | } | |
384 | } | |
385 | ||
386 | return NULL; | |
387 | } | |
388 | ||
389 | ||
390 | /* | |
391 | * Get service by {fwmark} in the service table. | |
392 | */ | |
393 | static __inline__ struct ip_vs_service *__ip_vs_svc_fwm_get(__u32 fwmark) | |
394 | { | |
395 | unsigned hash; | |
396 | struct ip_vs_service *svc; | |
397 | ||
398 | /* Check for fwmark addressed entries */ | |
399 | hash = ip_vs_svc_fwm_hashkey(fwmark); | |
400 | ||
401 | list_for_each_entry(svc, &ip_vs_svc_fwm_table[hash], f_list) { | |
402 | if (svc->fwmark == fwmark) { | |
403 | /* HIT */ | |
404 | atomic_inc(&svc->usecnt); | |
405 | return svc; | |
406 | } | |
407 | } | |
408 | ||
409 | return NULL; | |
410 | } | |
411 | ||
412 | struct ip_vs_service * | |
014d730d | 413 | ip_vs_service_get(__u32 fwmark, __u16 protocol, __be32 vaddr, __be16 vport) |
1da177e4 LT |
414 | { |
415 | struct ip_vs_service *svc; | |
416 | ||
417 | read_lock(&__ip_vs_svc_lock); | |
418 | ||
419 | /* | |
420 | * Check the table hashed by fwmark first | |
421 | */ | |
422 | if (fwmark && (svc = __ip_vs_svc_fwm_get(fwmark))) | |
423 | goto out; | |
424 | ||
425 | /* | |
426 | * Check the table hashed by <protocol,addr,port> | |
427 | * for "full" addressed entries | |
428 | */ | |
429 | svc = __ip_vs_service_get(protocol, vaddr, vport); | |
430 | ||
431 | if (svc == NULL | |
432 | && protocol == IPPROTO_TCP | |
433 | && atomic_read(&ip_vs_ftpsvc_counter) | |
434 | && (vport == FTPDATA || ntohs(vport) >= PROT_SOCK)) { | |
435 | /* | |
436 | * Check if ftp service entry exists, the packet | |
437 | * might belong to FTP data connections. | |
438 | */ | |
439 | svc = __ip_vs_service_get(protocol, vaddr, FTPPORT); | |
440 | } | |
441 | ||
442 | if (svc == NULL | |
443 | && atomic_read(&ip_vs_nullsvc_counter)) { | |
444 | /* | |
445 | * Check if the catch-all port (port zero) exists | |
446 | */ | |
447 | svc = __ip_vs_service_get(protocol, vaddr, 0); | |
448 | } | |
449 | ||
450 | out: | |
451 | read_unlock(&__ip_vs_svc_lock); | |
452 | ||
4b5bdf5c | 453 | IP_VS_DBG(9, "lookup service: fwm %u %s %u.%u.%u.%u:%u %s\n", |
1da177e4 LT |
454 | fwmark, ip_vs_proto_name(protocol), |
455 | NIPQUAD(vaddr), ntohs(vport), | |
456 | svc?"hit":"not hit"); | |
457 | ||
458 | return svc; | |
459 | } | |
460 | ||
461 | ||
462 | static inline void | |
463 | __ip_vs_bind_svc(struct ip_vs_dest *dest, struct ip_vs_service *svc) | |
464 | { | |
465 | atomic_inc(&svc->refcnt); | |
466 | dest->svc = svc; | |
467 | } | |
468 | ||
469 | static inline void | |
470 | __ip_vs_unbind_svc(struct ip_vs_dest *dest) | |
471 | { | |
472 | struct ip_vs_service *svc = dest->svc; | |
473 | ||
474 | dest->svc = NULL; | |
475 | if (atomic_dec_and_test(&svc->refcnt)) | |
476 | kfree(svc); | |
477 | } | |
478 | ||
479 | ||
480 | /* | |
481 | * Returns hash value for real service | |
482 | */ | |
014d730d | 483 | static __inline__ unsigned ip_vs_rs_hashkey(__be32 addr, __be16 port) |
1da177e4 LT |
484 | { |
485 | register unsigned porth = ntohs(port); | |
486 | ||
487 | return (ntohl(addr)^(porth>>IP_VS_RTAB_BITS)^porth) | |
488 | & IP_VS_RTAB_MASK; | |
489 | } | |
490 | ||
491 | /* | |
492 | * Hashes ip_vs_dest in ip_vs_rtable by <proto,addr,port>. | |
493 | * should be called with locked tables. | |
494 | */ | |
495 | static int ip_vs_rs_hash(struct ip_vs_dest *dest) | |
496 | { | |
497 | unsigned hash; | |
498 | ||
499 | if (!list_empty(&dest->d_list)) { | |
500 | return 0; | |
501 | } | |
502 | ||
503 | /* | |
504 | * Hash by proto,addr,port, | |
505 | * which are the parameters of the real service. | |
506 | */ | |
507 | hash = ip_vs_rs_hashkey(dest->addr, dest->port); | |
508 | list_add(&dest->d_list, &ip_vs_rtable[hash]); | |
509 | ||
510 | return 1; | |
511 | } | |
512 | ||
513 | /* | |
514 | * UNhashes ip_vs_dest from ip_vs_rtable. | |
515 | * should be called with locked tables. | |
516 | */ | |
517 | static int ip_vs_rs_unhash(struct ip_vs_dest *dest) | |
518 | { | |
519 | /* | |
520 | * Remove it from the ip_vs_rtable table. | |
521 | */ | |
522 | if (!list_empty(&dest->d_list)) { | |
523 | list_del(&dest->d_list); | |
524 | INIT_LIST_HEAD(&dest->d_list); | |
525 | } | |
526 | ||
527 | return 1; | |
528 | } | |
529 | ||
530 | /* | |
531 | * Lookup real service by <proto,addr,port> in the real service table. | |
532 | */ | |
533 | struct ip_vs_dest * | |
014d730d | 534 | ip_vs_lookup_real_service(__u16 protocol, __be32 daddr, __be16 dport) |
1da177e4 LT |
535 | { |
536 | unsigned hash; | |
537 | struct ip_vs_dest *dest; | |
538 | ||
539 | /* | |
540 | * Check for "full" addressed entries | |
541 | * Return the first found entry | |
542 | */ | |
543 | hash = ip_vs_rs_hashkey(daddr, dport); | |
544 | ||
545 | read_lock(&__ip_vs_rs_lock); | |
546 | list_for_each_entry(dest, &ip_vs_rtable[hash], d_list) { | |
547 | if ((dest->addr == daddr) | |
548 | && (dest->port == dport) | |
549 | && ((dest->protocol == protocol) || | |
550 | dest->vfwmark)) { | |
551 | /* HIT */ | |
552 | read_unlock(&__ip_vs_rs_lock); | |
553 | return dest; | |
554 | } | |
555 | } | |
556 | read_unlock(&__ip_vs_rs_lock); | |
557 | ||
558 | return NULL; | |
559 | } | |
560 | ||
561 | /* | |
562 | * Lookup destination by {addr,port} in the given service | |
563 | */ | |
564 | static struct ip_vs_dest * | |
014d730d | 565 | ip_vs_lookup_dest(struct ip_vs_service *svc, __be32 daddr, __be16 dport) |
1da177e4 LT |
566 | { |
567 | struct ip_vs_dest *dest; | |
568 | ||
569 | /* | |
570 | * Find the destination for the given service | |
571 | */ | |
572 | list_for_each_entry(dest, &svc->destinations, n_list) { | |
573 | if ((dest->addr == daddr) && (dest->port == dport)) { | |
574 | /* HIT */ | |
575 | return dest; | |
576 | } | |
577 | } | |
578 | ||
579 | return NULL; | |
580 | } | |
581 | ||
582 | ||
583 | /* | |
584 | * Lookup dest by {svc,addr,port} in the destination trash. | |
585 | * The destination trash is used to hold the destinations that are removed | |
586 | * from the service table but are still referenced by some conn entries. | |
587 | * The reason to add the destination trash is when the dest is temporary | |
588 | * down (either by administrator or by monitor program), the dest can be | |
589 | * picked back from the trash, the remaining connections to the dest can | |
590 | * continue, and the counting information of the dest is also useful for | |
591 | * scheduling. | |
592 | */ | |
593 | static struct ip_vs_dest * | |
014d730d | 594 | ip_vs_trash_get_dest(struct ip_vs_service *svc, __be32 daddr, __be16 dport) |
1da177e4 LT |
595 | { |
596 | struct ip_vs_dest *dest, *nxt; | |
597 | ||
598 | /* | |
599 | * Find the destination in trash | |
600 | */ | |
601 | list_for_each_entry_safe(dest, nxt, &ip_vs_dest_trash, n_list) { | |
602 | IP_VS_DBG(3, "Destination %u/%u.%u.%u.%u:%u still in trash, " | |
4b5bdf5c | 603 | "dest->refcnt=%d\n", |
1da177e4 LT |
604 | dest->vfwmark, |
605 | NIPQUAD(dest->addr), ntohs(dest->port), | |
606 | atomic_read(&dest->refcnt)); | |
607 | if (dest->addr == daddr && | |
608 | dest->port == dport && | |
609 | dest->vfwmark == svc->fwmark && | |
610 | dest->protocol == svc->protocol && | |
611 | (svc->fwmark || | |
612 | (dest->vaddr == svc->addr && | |
613 | dest->vport == svc->port))) { | |
614 | /* HIT */ | |
615 | return dest; | |
616 | } | |
617 | ||
618 | /* | |
619 | * Try to purge the destination from trash if not referenced | |
620 | */ | |
621 | if (atomic_read(&dest->refcnt) == 1) { | |
622 | IP_VS_DBG(3, "Removing destination %u/%u.%u.%u.%u:%u " | |
623 | "from trash\n", | |
624 | dest->vfwmark, | |
625 | NIPQUAD(dest->addr), ntohs(dest->port)); | |
626 | list_del(&dest->n_list); | |
627 | ip_vs_dst_reset(dest); | |
628 | __ip_vs_unbind_svc(dest); | |
629 | kfree(dest); | |
630 | } | |
631 | } | |
632 | ||
633 | return NULL; | |
634 | } | |
635 | ||
636 | ||
637 | /* | |
638 | * Clean up all the destinations in the trash | |
639 | * Called by the ip_vs_control_cleanup() | |
640 | * | |
641 | * When the ip_vs_control_clearup is activated by ipvs module exit, | |
642 | * the service tables must have been flushed and all the connections | |
643 | * are expired, and the refcnt of each destination in the trash must | |
644 | * be 1, so we simply release them here. | |
645 | */ | |
646 | static void ip_vs_trash_cleanup(void) | |
647 | { | |
648 | struct ip_vs_dest *dest, *nxt; | |
649 | ||
650 | list_for_each_entry_safe(dest, nxt, &ip_vs_dest_trash, n_list) { | |
651 | list_del(&dest->n_list); | |
652 | ip_vs_dst_reset(dest); | |
653 | __ip_vs_unbind_svc(dest); | |
654 | kfree(dest); | |
655 | } | |
656 | } | |
657 | ||
658 | ||
659 | static void | |
660 | ip_vs_zero_stats(struct ip_vs_stats *stats) | |
661 | { | |
662 | spin_lock_bh(&stats->lock); | |
663 | memset(stats, 0, (char *)&stats->lock - (char *)stats); | |
664 | spin_unlock_bh(&stats->lock); | |
665 | ip_vs_zero_estimator(stats); | |
666 | } | |
667 | ||
668 | /* | |
669 | * Update a destination in the given service | |
670 | */ | |
671 | static void | |
672 | __ip_vs_update_dest(struct ip_vs_service *svc, | |
673 | struct ip_vs_dest *dest, struct ip_vs_dest_user *udest) | |
674 | { | |
675 | int conn_flags; | |
676 | ||
677 | /* set the weight and the flags */ | |
678 | atomic_set(&dest->weight, udest->weight); | |
679 | conn_flags = udest->conn_flags | IP_VS_CONN_F_INACTIVE; | |
680 | ||
681 | /* check if local node and update the flags */ | |
682 | if (inet_addr_type(udest->addr) == RTN_LOCAL) { | |
683 | conn_flags = (conn_flags & ~IP_VS_CONN_F_FWD_MASK) | |
684 | | IP_VS_CONN_F_LOCALNODE; | |
685 | } | |
686 | ||
687 | /* set the IP_VS_CONN_F_NOOUTPUT flag if not masquerading/NAT */ | |
688 | if ((conn_flags & IP_VS_CONN_F_FWD_MASK) != 0) { | |
689 | conn_flags |= IP_VS_CONN_F_NOOUTPUT; | |
690 | } else { | |
691 | /* | |
692 | * Put the real service in ip_vs_rtable if not present. | |
693 | * For now only for NAT! | |
694 | */ | |
695 | write_lock_bh(&__ip_vs_rs_lock); | |
696 | ip_vs_rs_hash(dest); | |
697 | write_unlock_bh(&__ip_vs_rs_lock); | |
698 | } | |
699 | atomic_set(&dest->conn_flags, conn_flags); | |
700 | ||
701 | /* bind the service */ | |
702 | if (!dest->svc) { | |
703 | __ip_vs_bind_svc(dest, svc); | |
704 | } else { | |
705 | if (dest->svc != svc) { | |
706 | __ip_vs_unbind_svc(dest); | |
707 | ip_vs_zero_stats(&dest->stats); | |
708 | __ip_vs_bind_svc(dest, svc); | |
709 | } | |
710 | } | |
711 | ||
712 | /* set the dest status flags */ | |
713 | dest->flags |= IP_VS_DEST_F_AVAILABLE; | |
714 | ||
715 | if (udest->u_threshold == 0 || udest->u_threshold > dest->u_threshold) | |
716 | dest->flags &= ~IP_VS_DEST_F_OVERLOAD; | |
717 | dest->u_threshold = udest->u_threshold; | |
718 | dest->l_threshold = udest->l_threshold; | |
719 | } | |
720 | ||
721 | ||
722 | /* | |
723 | * Create a destination for the given service | |
724 | */ | |
725 | static int | |
726 | ip_vs_new_dest(struct ip_vs_service *svc, struct ip_vs_dest_user *udest, | |
727 | struct ip_vs_dest **dest_p) | |
728 | { | |
729 | struct ip_vs_dest *dest; | |
730 | unsigned atype; | |
731 | ||
732 | EnterFunction(2); | |
733 | ||
734 | atype = inet_addr_type(udest->addr); | |
735 | if (atype != RTN_LOCAL && atype != RTN_UNICAST) | |
736 | return -EINVAL; | |
737 | ||
0da974f4 | 738 | dest = kzalloc(sizeof(struct ip_vs_dest), GFP_ATOMIC); |
1da177e4 LT |
739 | if (dest == NULL) { |
740 | IP_VS_ERR("ip_vs_new_dest: kmalloc failed.\n"); | |
741 | return -ENOMEM; | |
742 | } | |
1da177e4 LT |
743 | |
744 | dest->protocol = svc->protocol; | |
745 | dest->vaddr = svc->addr; | |
746 | dest->vport = svc->port; | |
747 | dest->vfwmark = svc->fwmark; | |
748 | dest->addr = udest->addr; | |
749 | dest->port = udest->port; | |
750 | ||
751 | atomic_set(&dest->activeconns, 0); | |
752 | atomic_set(&dest->inactconns, 0); | |
753 | atomic_set(&dest->persistconns, 0); | |
754 | atomic_set(&dest->refcnt, 0); | |
755 | ||
756 | INIT_LIST_HEAD(&dest->d_list); | |
757 | spin_lock_init(&dest->dst_lock); | |
758 | spin_lock_init(&dest->stats.lock); | |
759 | __ip_vs_update_dest(svc, dest, udest); | |
760 | ip_vs_new_estimator(&dest->stats); | |
761 | ||
762 | *dest_p = dest; | |
763 | ||
764 | LeaveFunction(2); | |
765 | return 0; | |
766 | } | |
767 | ||
768 | ||
769 | /* | |
770 | * Add a destination into an existing service | |
771 | */ | |
772 | static int | |
773 | ip_vs_add_dest(struct ip_vs_service *svc, struct ip_vs_dest_user *udest) | |
774 | { | |
775 | struct ip_vs_dest *dest; | |
014d730d AV |
776 | __be32 daddr = udest->addr; |
777 | __be16 dport = udest->port; | |
1da177e4 LT |
778 | int ret; |
779 | ||
780 | EnterFunction(2); | |
781 | ||
782 | if (udest->weight < 0) { | |
783 | IP_VS_ERR("ip_vs_add_dest(): server weight less than zero\n"); | |
784 | return -ERANGE; | |
785 | } | |
786 | ||
787 | if (udest->l_threshold > udest->u_threshold) { | |
788 | IP_VS_ERR("ip_vs_add_dest(): lower threshold is higher than " | |
789 | "upper threshold\n"); | |
790 | return -ERANGE; | |
791 | } | |
792 | ||
793 | /* | |
794 | * Check if the dest already exists in the list | |
795 | */ | |
796 | dest = ip_vs_lookup_dest(svc, daddr, dport); | |
797 | if (dest != NULL) { | |
798 | IP_VS_DBG(1, "ip_vs_add_dest(): dest already exists\n"); | |
799 | return -EEXIST; | |
800 | } | |
801 | ||
802 | /* | |
803 | * Check if the dest already exists in the trash and | |
804 | * is from the same service | |
805 | */ | |
806 | dest = ip_vs_trash_get_dest(svc, daddr, dport); | |
807 | if (dest != NULL) { | |
808 | IP_VS_DBG(3, "Get destination %u.%u.%u.%u:%u from trash, " | |
4b5bdf5c | 809 | "dest->refcnt=%d, service %u/%u.%u.%u.%u:%u\n", |
1da177e4 LT |
810 | NIPQUAD(daddr), ntohs(dport), |
811 | atomic_read(&dest->refcnt), | |
812 | dest->vfwmark, | |
813 | NIPQUAD(dest->vaddr), | |
814 | ntohs(dest->vport)); | |
815 | __ip_vs_update_dest(svc, dest, udest); | |
816 | ||
817 | /* | |
818 | * Get the destination from the trash | |
819 | */ | |
820 | list_del(&dest->n_list); | |
821 | ||
822 | ip_vs_new_estimator(&dest->stats); | |
823 | ||
824 | write_lock_bh(&__ip_vs_svc_lock); | |
825 | ||
826 | /* | |
827 | * Wait until all other svc users go away. | |
828 | */ | |
829 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1); | |
830 | ||
831 | list_add(&dest->n_list, &svc->destinations); | |
832 | svc->num_dests++; | |
833 | ||
834 | /* call the update_service function of its scheduler */ | |
835 | svc->scheduler->update_service(svc); | |
836 | ||
837 | write_unlock_bh(&__ip_vs_svc_lock); | |
838 | return 0; | |
839 | } | |
840 | ||
841 | /* | |
842 | * Allocate and initialize the dest structure | |
843 | */ | |
844 | ret = ip_vs_new_dest(svc, udest, &dest); | |
845 | if (ret) { | |
846 | return ret; | |
847 | } | |
848 | ||
849 | /* | |
850 | * Add the dest entry into the list | |
851 | */ | |
852 | atomic_inc(&dest->refcnt); | |
853 | ||
854 | write_lock_bh(&__ip_vs_svc_lock); | |
855 | ||
856 | /* | |
857 | * Wait until all other svc users go away. | |
858 | */ | |
859 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1); | |
860 | ||
861 | list_add(&dest->n_list, &svc->destinations); | |
862 | svc->num_dests++; | |
863 | ||
864 | /* call the update_service function of its scheduler */ | |
865 | svc->scheduler->update_service(svc); | |
866 | ||
867 | write_unlock_bh(&__ip_vs_svc_lock); | |
868 | ||
869 | LeaveFunction(2); | |
870 | ||
871 | return 0; | |
872 | } | |
873 | ||
874 | ||
875 | /* | |
876 | * Edit a destination in the given service | |
877 | */ | |
878 | static int | |
879 | ip_vs_edit_dest(struct ip_vs_service *svc, struct ip_vs_dest_user *udest) | |
880 | { | |
881 | struct ip_vs_dest *dest; | |
014d730d AV |
882 | __be32 daddr = udest->addr; |
883 | __be16 dport = udest->port; | |
1da177e4 LT |
884 | |
885 | EnterFunction(2); | |
886 | ||
887 | if (udest->weight < 0) { | |
888 | IP_VS_ERR("ip_vs_edit_dest(): server weight less than zero\n"); | |
889 | return -ERANGE; | |
890 | } | |
891 | ||
892 | if (udest->l_threshold > udest->u_threshold) { | |
893 | IP_VS_ERR("ip_vs_edit_dest(): lower threshold is higher than " | |
894 | "upper threshold\n"); | |
895 | return -ERANGE; | |
896 | } | |
897 | ||
898 | /* | |
899 | * Lookup the destination list | |
900 | */ | |
901 | dest = ip_vs_lookup_dest(svc, daddr, dport); | |
902 | if (dest == NULL) { | |
903 | IP_VS_DBG(1, "ip_vs_edit_dest(): dest doesn't exist\n"); | |
904 | return -ENOENT; | |
905 | } | |
906 | ||
907 | __ip_vs_update_dest(svc, dest, udest); | |
908 | ||
909 | write_lock_bh(&__ip_vs_svc_lock); | |
910 | ||
911 | /* Wait until all other svc users go away */ | |
912 | while (atomic_read(&svc->usecnt) > 1) {}; | |
913 | ||
914 | /* call the update_service, because server weight may be changed */ | |
915 | svc->scheduler->update_service(svc); | |
916 | ||
917 | write_unlock_bh(&__ip_vs_svc_lock); | |
918 | ||
919 | LeaveFunction(2); | |
920 | ||
921 | return 0; | |
922 | } | |
923 | ||
924 | ||
925 | /* | |
926 | * Delete a destination (must be already unlinked from the service) | |
927 | */ | |
928 | static void __ip_vs_del_dest(struct ip_vs_dest *dest) | |
929 | { | |
930 | ip_vs_kill_estimator(&dest->stats); | |
931 | ||
932 | /* | |
933 | * Remove it from the d-linked list with the real services. | |
934 | */ | |
935 | write_lock_bh(&__ip_vs_rs_lock); | |
936 | ip_vs_rs_unhash(dest); | |
937 | write_unlock_bh(&__ip_vs_rs_lock); | |
938 | ||
939 | /* | |
940 | * Decrease the refcnt of the dest, and free the dest | |
941 | * if nobody refers to it (refcnt=0). Otherwise, throw | |
942 | * the destination into the trash. | |
943 | */ | |
944 | if (atomic_dec_and_test(&dest->refcnt)) { | |
945 | ip_vs_dst_reset(dest); | |
946 | /* simply decrease svc->refcnt here, let the caller check | |
947 | and release the service if nobody refers to it. | |
948 | Only user context can release destination and service, | |
949 | and only one user context can update virtual service at a | |
950 | time, so the operation here is OK */ | |
951 | atomic_dec(&dest->svc->refcnt); | |
952 | kfree(dest); | |
953 | } else { | |
4b5bdf5c RN |
954 | IP_VS_DBG(3, "Moving dest %u.%u.%u.%u:%u into trash, " |
955 | "dest->refcnt=%d\n", | |
1da177e4 LT |
956 | NIPQUAD(dest->addr), ntohs(dest->port), |
957 | atomic_read(&dest->refcnt)); | |
958 | list_add(&dest->n_list, &ip_vs_dest_trash); | |
959 | atomic_inc(&dest->refcnt); | |
960 | } | |
961 | } | |
962 | ||
963 | ||
964 | /* | |
965 | * Unlink a destination from the given service | |
966 | */ | |
967 | static void __ip_vs_unlink_dest(struct ip_vs_service *svc, | |
968 | struct ip_vs_dest *dest, | |
969 | int svcupd) | |
970 | { | |
971 | dest->flags &= ~IP_VS_DEST_F_AVAILABLE; | |
972 | ||
973 | /* | |
974 | * Remove it from the d-linked destination list. | |
975 | */ | |
976 | list_del(&dest->n_list); | |
977 | svc->num_dests--; | |
978 | if (svcupd) { | |
979 | /* | |
980 | * Call the update_service function of its scheduler | |
981 | */ | |
982 | svc->scheduler->update_service(svc); | |
983 | } | |
984 | } | |
985 | ||
986 | ||
987 | /* | |
988 | * Delete a destination server in the given service | |
989 | */ | |
990 | static int | |
991 | ip_vs_del_dest(struct ip_vs_service *svc,struct ip_vs_dest_user *udest) | |
992 | { | |
993 | struct ip_vs_dest *dest; | |
014d730d AV |
994 | __be32 daddr = udest->addr; |
995 | __be16 dport = udest->port; | |
1da177e4 LT |
996 | |
997 | EnterFunction(2); | |
998 | ||
999 | dest = ip_vs_lookup_dest(svc, daddr, dport); | |
1000 | if (dest == NULL) { | |
1001 | IP_VS_DBG(1, "ip_vs_del_dest(): destination not found!\n"); | |
1002 | return -ENOENT; | |
1003 | } | |
1004 | ||
1005 | write_lock_bh(&__ip_vs_svc_lock); | |
1006 | ||
1007 | /* | |
1008 | * Wait until all other svc users go away. | |
1009 | */ | |
1010 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1); | |
1011 | ||
1012 | /* | |
1013 | * Unlink dest from the service | |
1014 | */ | |
1015 | __ip_vs_unlink_dest(svc, dest, 1); | |
1016 | ||
1017 | write_unlock_bh(&__ip_vs_svc_lock); | |
1018 | ||
1019 | /* | |
1020 | * Delete the destination | |
1021 | */ | |
1022 | __ip_vs_del_dest(dest); | |
1023 | ||
1024 | LeaveFunction(2); | |
1025 | ||
1026 | return 0; | |
1027 | } | |
1028 | ||
1029 | ||
1030 | /* | |
1031 | * Add a service into the service hash table | |
1032 | */ | |
1033 | static int | |
1034 | ip_vs_add_service(struct ip_vs_service_user *u, struct ip_vs_service **svc_p) | |
1035 | { | |
1036 | int ret = 0; | |
1037 | struct ip_vs_scheduler *sched = NULL; | |
1038 | struct ip_vs_service *svc = NULL; | |
1039 | ||
1040 | /* increase the module use count */ | |
1041 | ip_vs_use_count_inc(); | |
1042 | ||
1043 | /* Lookup the scheduler by 'u->sched_name' */ | |
1044 | sched = ip_vs_scheduler_get(u->sched_name); | |
1045 | if (sched == NULL) { | |
1046 | IP_VS_INFO("Scheduler module ip_vs_%s not found\n", | |
1047 | u->sched_name); | |
1048 | ret = -ENOENT; | |
1049 | goto out_mod_dec; | |
1050 | } | |
1051 | ||
0da974f4 | 1052 | svc = kzalloc(sizeof(struct ip_vs_service), GFP_ATOMIC); |
1da177e4 LT |
1053 | if (svc == NULL) { |
1054 | IP_VS_DBG(1, "ip_vs_add_service: kmalloc failed.\n"); | |
1055 | ret = -ENOMEM; | |
1056 | goto out_err; | |
1057 | } | |
1da177e4 LT |
1058 | |
1059 | /* I'm the first user of the service */ | |
1060 | atomic_set(&svc->usecnt, 1); | |
1061 | atomic_set(&svc->refcnt, 0); | |
1062 | ||
1063 | svc->protocol = u->protocol; | |
1064 | svc->addr = u->addr; | |
1065 | svc->port = u->port; | |
1066 | svc->fwmark = u->fwmark; | |
1067 | svc->flags = u->flags; | |
1068 | svc->timeout = u->timeout * HZ; | |
1069 | svc->netmask = u->netmask; | |
1070 | ||
1071 | INIT_LIST_HEAD(&svc->destinations); | |
1072 | rwlock_init(&svc->sched_lock); | |
1073 | spin_lock_init(&svc->stats.lock); | |
1074 | ||
1075 | /* Bind the scheduler */ | |
1076 | ret = ip_vs_bind_scheduler(svc, sched); | |
1077 | if (ret) | |
1078 | goto out_err; | |
1079 | sched = NULL; | |
1080 | ||
1081 | /* Update the virtual service counters */ | |
1082 | if (svc->port == FTPPORT) | |
1083 | atomic_inc(&ip_vs_ftpsvc_counter); | |
1084 | else if (svc->port == 0) | |
1085 | atomic_inc(&ip_vs_nullsvc_counter); | |
1086 | ||
1087 | ip_vs_new_estimator(&svc->stats); | |
1088 | ip_vs_num_services++; | |
1089 | ||
1090 | /* Hash the service into the service table */ | |
1091 | write_lock_bh(&__ip_vs_svc_lock); | |
1092 | ip_vs_svc_hash(svc); | |
1093 | write_unlock_bh(&__ip_vs_svc_lock); | |
1094 | ||
1095 | *svc_p = svc; | |
1096 | return 0; | |
1097 | ||
1098 | out_err: | |
1099 | if (svc != NULL) { | |
1100 | if (svc->scheduler) | |
1101 | ip_vs_unbind_scheduler(svc); | |
1102 | if (svc->inc) { | |
1103 | local_bh_disable(); | |
1104 | ip_vs_app_inc_put(svc->inc); | |
1105 | local_bh_enable(); | |
1106 | } | |
1107 | kfree(svc); | |
1108 | } | |
1109 | ip_vs_scheduler_put(sched); | |
1110 | ||
1111 | out_mod_dec: | |
1112 | /* decrease the module use count */ | |
1113 | ip_vs_use_count_dec(); | |
1114 | ||
1115 | return ret; | |
1116 | } | |
1117 | ||
1118 | ||
1119 | /* | |
1120 | * Edit a service and bind it with a new scheduler | |
1121 | */ | |
1122 | static int | |
1123 | ip_vs_edit_service(struct ip_vs_service *svc, struct ip_vs_service_user *u) | |
1124 | { | |
1125 | struct ip_vs_scheduler *sched, *old_sched; | |
1126 | int ret = 0; | |
1127 | ||
1128 | /* | |
1129 | * Lookup the scheduler, by 'u->sched_name' | |
1130 | */ | |
1131 | sched = ip_vs_scheduler_get(u->sched_name); | |
1132 | if (sched == NULL) { | |
1133 | IP_VS_INFO("Scheduler module ip_vs_%s not found\n", | |
1134 | u->sched_name); | |
1135 | return -ENOENT; | |
1136 | } | |
1137 | old_sched = sched; | |
1138 | ||
1139 | write_lock_bh(&__ip_vs_svc_lock); | |
1140 | ||
1141 | /* | |
1142 | * Wait until all other svc users go away. | |
1143 | */ | |
1144 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1); | |
1145 | ||
1146 | /* | |
1147 | * Set the flags and timeout value | |
1148 | */ | |
1149 | svc->flags = u->flags | IP_VS_SVC_F_HASHED; | |
1150 | svc->timeout = u->timeout * HZ; | |
1151 | svc->netmask = u->netmask; | |
1152 | ||
1153 | old_sched = svc->scheduler; | |
1154 | if (sched != old_sched) { | |
1155 | /* | |
1156 | * Unbind the old scheduler | |
1157 | */ | |
1158 | if ((ret = ip_vs_unbind_scheduler(svc))) { | |
1159 | old_sched = sched; | |
1160 | goto out; | |
1161 | } | |
1162 | ||
1163 | /* | |
1164 | * Bind the new scheduler | |
1165 | */ | |
1166 | if ((ret = ip_vs_bind_scheduler(svc, sched))) { | |
1167 | /* | |
1168 | * If ip_vs_bind_scheduler fails, restore the old | |
1169 | * scheduler. | |
1170 | * The main reason of failure is out of memory. | |
1171 | * | |
1172 | * The question is if the old scheduler can be | |
1173 | * restored all the time. TODO: if it cannot be | |
1174 | * restored some time, we must delete the service, | |
1175 | * otherwise the system may crash. | |
1176 | */ | |
1177 | ip_vs_bind_scheduler(svc, old_sched); | |
1178 | old_sched = sched; | |
1179 | goto out; | |
1180 | } | |
1181 | } | |
1182 | ||
1183 | out: | |
1184 | write_unlock_bh(&__ip_vs_svc_lock); | |
1185 | ||
1186 | if (old_sched) | |
1187 | ip_vs_scheduler_put(old_sched); | |
1188 | ||
1189 | return ret; | |
1190 | } | |
1191 | ||
1192 | ||
1193 | /* | |
1194 | * Delete a service from the service list | |
1195 | * - The service must be unlinked, unlocked and not referenced! | |
1196 | * - We are called under _bh lock | |
1197 | */ | |
1198 | static void __ip_vs_del_service(struct ip_vs_service *svc) | |
1199 | { | |
1200 | struct ip_vs_dest *dest, *nxt; | |
1201 | struct ip_vs_scheduler *old_sched; | |
1202 | ||
1203 | ip_vs_num_services--; | |
1204 | ip_vs_kill_estimator(&svc->stats); | |
1205 | ||
1206 | /* Unbind scheduler */ | |
1207 | old_sched = svc->scheduler; | |
1208 | ip_vs_unbind_scheduler(svc); | |
1209 | if (old_sched) | |
1210 | ip_vs_scheduler_put(old_sched); | |
1211 | ||
1212 | /* Unbind app inc */ | |
1213 | if (svc->inc) { | |
1214 | ip_vs_app_inc_put(svc->inc); | |
1215 | svc->inc = NULL; | |
1216 | } | |
1217 | ||
1218 | /* | |
1219 | * Unlink the whole destination list | |
1220 | */ | |
1221 | list_for_each_entry_safe(dest, nxt, &svc->destinations, n_list) { | |
1222 | __ip_vs_unlink_dest(svc, dest, 0); | |
1223 | __ip_vs_del_dest(dest); | |
1224 | } | |
1225 | ||
1226 | /* | |
1227 | * Update the virtual service counters | |
1228 | */ | |
1229 | if (svc->port == FTPPORT) | |
1230 | atomic_dec(&ip_vs_ftpsvc_counter); | |
1231 | else if (svc->port == 0) | |
1232 | atomic_dec(&ip_vs_nullsvc_counter); | |
1233 | ||
1234 | /* | |
1235 | * Free the service if nobody refers to it | |
1236 | */ | |
1237 | if (atomic_read(&svc->refcnt) == 0) | |
1238 | kfree(svc); | |
1239 | ||
1240 | /* decrease the module use count */ | |
1241 | ip_vs_use_count_dec(); | |
1242 | } | |
1243 | ||
1244 | /* | |
1245 | * Delete a service from the service list | |
1246 | */ | |
1247 | static int ip_vs_del_service(struct ip_vs_service *svc) | |
1248 | { | |
1249 | if (svc == NULL) | |
1250 | return -EEXIST; | |
1251 | ||
1252 | /* | |
1253 | * Unhash it from the service table | |
1254 | */ | |
1255 | write_lock_bh(&__ip_vs_svc_lock); | |
1256 | ||
1257 | ip_vs_svc_unhash(svc); | |
1258 | ||
1259 | /* | |
1260 | * Wait until all the svc users go away. | |
1261 | */ | |
1262 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1); | |
1263 | ||
1264 | __ip_vs_del_service(svc); | |
1265 | ||
1266 | write_unlock_bh(&__ip_vs_svc_lock); | |
1267 | ||
1268 | return 0; | |
1269 | } | |
1270 | ||
1271 | ||
1272 | /* | |
1273 | * Flush all the virtual services | |
1274 | */ | |
1275 | static int ip_vs_flush(void) | |
1276 | { | |
1277 | int idx; | |
1278 | struct ip_vs_service *svc, *nxt; | |
1279 | ||
1280 | /* | |
1281 | * Flush the service table hashed by <protocol,addr,port> | |
1282 | */ | |
1283 | for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
1284 | list_for_each_entry_safe(svc, nxt, &ip_vs_svc_table[idx], s_list) { | |
1285 | write_lock_bh(&__ip_vs_svc_lock); | |
1286 | ip_vs_svc_unhash(svc); | |
1287 | /* | |
1288 | * Wait until all the svc users go away. | |
1289 | */ | |
1290 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 0); | |
1291 | __ip_vs_del_service(svc); | |
1292 | write_unlock_bh(&__ip_vs_svc_lock); | |
1293 | } | |
1294 | } | |
1295 | ||
1296 | /* | |
1297 | * Flush the service table hashed by fwmark | |
1298 | */ | |
1299 | for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
1300 | list_for_each_entry_safe(svc, nxt, | |
1301 | &ip_vs_svc_fwm_table[idx], f_list) { | |
1302 | write_lock_bh(&__ip_vs_svc_lock); | |
1303 | ip_vs_svc_unhash(svc); | |
1304 | /* | |
1305 | * Wait until all the svc users go away. | |
1306 | */ | |
1307 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 0); | |
1308 | __ip_vs_del_service(svc); | |
1309 | write_unlock_bh(&__ip_vs_svc_lock); | |
1310 | } | |
1311 | } | |
1312 | ||
1313 | return 0; | |
1314 | } | |
1315 | ||
1316 | ||
1317 | /* | |
1318 | * Zero counters in a service or all services | |
1319 | */ | |
1320 | static int ip_vs_zero_service(struct ip_vs_service *svc) | |
1321 | { | |
1322 | struct ip_vs_dest *dest; | |
1323 | ||
1324 | write_lock_bh(&__ip_vs_svc_lock); | |
1325 | list_for_each_entry(dest, &svc->destinations, n_list) { | |
1326 | ip_vs_zero_stats(&dest->stats); | |
1327 | } | |
1328 | ip_vs_zero_stats(&svc->stats); | |
1329 | write_unlock_bh(&__ip_vs_svc_lock); | |
1330 | return 0; | |
1331 | } | |
1332 | ||
1333 | static int ip_vs_zero_all(void) | |
1334 | { | |
1335 | int idx; | |
1336 | struct ip_vs_service *svc; | |
1337 | ||
1338 | for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
1339 | list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) { | |
1340 | ip_vs_zero_service(svc); | |
1341 | } | |
1342 | } | |
1343 | ||
1344 | for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
1345 | list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) { | |
1346 | ip_vs_zero_service(svc); | |
1347 | } | |
1348 | } | |
1349 | ||
1350 | ip_vs_zero_stats(&ip_vs_stats); | |
1351 | return 0; | |
1352 | } | |
1353 | ||
1354 | ||
1355 | static int | |
1356 | proc_do_defense_mode(ctl_table *table, int write, struct file * filp, | |
1357 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
1358 | { | |
1359 | int *valp = table->data; | |
1360 | int val = *valp; | |
1361 | int rc; | |
1362 | ||
1363 | rc = proc_dointvec(table, write, filp, buffer, lenp, ppos); | |
1364 | if (write && (*valp != val)) { | |
1365 | if ((*valp < 0) || (*valp > 3)) { | |
1366 | /* Restore the correct value */ | |
1367 | *valp = val; | |
1368 | } else { | |
1da177e4 | 1369 | update_defense_level(); |
1da177e4 LT |
1370 | } |
1371 | } | |
1372 | return rc; | |
1373 | } | |
1374 | ||
1375 | ||
1376 | static int | |
1377 | proc_do_sync_threshold(ctl_table *table, int write, struct file *filp, | |
1378 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
1379 | { | |
1380 | int *valp = table->data; | |
1381 | int val[2]; | |
1382 | int rc; | |
1383 | ||
1384 | /* backup the value first */ | |
1385 | memcpy(val, valp, sizeof(val)); | |
1386 | ||
1387 | rc = proc_dointvec(table, write, filp, buffer, lenp, ppos); | |
1388 | if (write && (valp[0] < 0 || valp[1] < 0 || valp[0] >= valp[1])) { | |
1389 | /* Restore the correct value */ | |
1390 | memcpy(valp, val, sizeof(val)); | |
1391 | } | |
1392 | return rc; | |
1393 | } | |
1394 | ||
1395 | ||
1396 | /* | |
1397 | * IPVS sysctl table (under the /proc/sys/net/ipv4/vs/) | |
1398 | */ | |
1399 | ||
1400 | static struct ctl_table vs_vars[] = { | |
1401 | { | |
1402 | .ctl_name = NET_IPV4_VS_AMEMTHRESH, | |
1403 | .procname = "amemthresh", | |
1404 | .data = &sysctl_ip_vs_amemthresh, | |
1405 | .maxlen = sizeof(int), | |
1406 | .mode = 0644, | |
1407 | .proc_handler = &proc_dointvec, | |
1408 | }, | |
1409 | #ifdef CONFIG_IP_VS_DEBUG | |
1410 | { | |
1411 | .ctl_name = NET_IPV4_VS_DEBUG_LEVEL, | |
1412 | .procname = "debug_level", | |
1413 | .data = &sysctl_ip_vs_debug_level, | |
1414 | .maxlen = sizeof(int), | |
1415 | .mode = 0644, | |
1416 | .proc_handler = &proc_dointvec, | |
1417 | }, | |
1418 | #endif | |
1419 | { | |
1420 | .ctl_name = NET_IPV4_VS_AMDROPRATE, | |
1421 | .procname = "am_droprate", | |
1422 | .data = &sysctl_ip_vs_am_droprate, | |
1423 | .maxlen = sizeof(int), | |
1424 | .mode = 0644, | |
1425 | .proc_handler = &proc_dointvec, | |
1426 | }, | |
1427 | { | |
1428 | .ctl_name = NET_IPV4_VS_DROP_ENTRY, | |
1429 | .procname = "drop_entry", | |
1430 | .data = &sysctl_ip_vs_drop_entry, | |
1431 | .maxlen = sizeof(int), | |
1432 | .mode = 0644, | |
1433 | .proc_handler = &proc_do_defense_mode, | |
1434 | }, | |
1435 | { | |
1436 | .ctl_name = NET_IPV4_VS_DROP_PACKET, | |
1437 | .procname = "drop_packet", | |
1438 | .data = &sysctl_ip_vs_drop_packet, | |
1439 | .maxlen = sizeof(int), | |
1440 | .mode = 0644, | |
1441 | .proc_handler = &proc_do_defense_mode, | |
1442 | }, | |
1443 | { | |
1444 | .ctl_name = NET_IPV4_VS_SECURE_TCP, | |
1445 | .procname = "secure_tcp", | |
1446 | .data = &sysctl_ip_vs_secure_tcp, | |
1447 | .maxlen = sizeof(int), | |
1448 | .mode = 0644, | |
1449 | .proc_handler = &proc_do_defense_mode, | |
1450 | }, | |
1451 | #if 0 | |
1452 | { | |
1453 | .ctl_name = NET_IPV4_VS_TO_ES, | |
1454 | .procname = "timeout_established", | |
1455 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_ESTABLISHED], | |
1456 | .maxlen = sizeof(int), | |
1457 | .mode = 0644, | |
1458 | .proc_handler = &proc_dointvec_jiffies, | |
1459 | }, | |
1460 | { | |
1461 | .ctl_name = NET_IPV4_VS_TO_SS, | |
1462 | .procname = "timeout_synsent", | |
1463 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYN_SENT], | |
1464 | .maxlen = sizeof(int), | |
1465 | .mode = 0644, | |
1466 | .proc_handler = &proc_dointvec_jiffies, | |
1467 | }, | |
1468 | { | |
1469 | .ctl_name = NET_IPV4_VS_TO_SR, | |
1470 | .procname = "timeout_synrecv", | |
1471 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYN_RECV], | |
1472 | .maxlen = sizeof(int), | |
1473 | .mode = 0644, | |
1474 | .proc_handler = &proc_dointvec_jiffies, | |
1475 | }, | |
1476 | { | |
1477 | .ctl_name = NET_IPV4_VS_TO_FW, | |
1478 | .procname = "timeout_finwait", | |
1479 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_FIN_WAIT], | |
1480 | .maxlen = sizeof(int), | |
1481 | .mode = 0644, | |
1482 | .proc_handler = &proc_dointvec_jiffies, | |
1483 | }, | |
1484 | { | |
1485 | .ctl_name = NET_IPV4_VS_TO_TW, | |
1486 | .procname = "timeout_timewait", | |
1487 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_TIME_WAIT], | |
1488 | .maxlen = sizeof(int), | |
1489 | .mode = 0644, | |
1490 | .proc_handler = &proc_dointvec_jiffies, | |
1491 | }, | |
1492 | { | |
1493 | .ctl_name = NET_IPV4_VS_TO_CL, | |
1494 | .procname = "timeout_close", | |
1495 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_CLOSE], | |
1496 | .maxlen = sizeof(int), | |
1497 | .mode = 0644, | |
1498 | .proc_handler = &proc_dointvec_jiffies, | |
1499 | }, | |
1500 | { | |
1501 | .ctl_name = NET_IPV4_VS_TO_CW, | |
1502 | .procname = "timeout_closewait", | |
1503 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_CLOSE_WAIT], | |
1504 | .maxlen = sizeof(int), | |
1505 | .mode = 0644, | |
1506 | .proc_handler = &proc_dointvec_jiffies, | |
1507 | }, | |
1508 | { | |
1509 | .ctl_name = NET_IPV4_VS_TO_LA, | |
1510 | .procname = "timeout_lastack", | |
1511 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_LAST_ACK], | |
1512 | .maxlen = sizeof(int), | |
1513 | .mode = 0644, | |
1514 | .proc_handler = &proc_dointvec_jiffies, | |
1515 | }, | |
1516 | { | |
1517 | .ctl_name = NET_IPV4_VS_TO_LI, | |
1518 | .procname = "timeout_listen", | |
1519 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_LISTEN], | |
1520 | .maxlen = sizeof(int), | |
1521 | .mode = 0644, | |
1522 | .proc_handler = &proc_dointvec_jiffies, | |
1523 | }, | |
1524 | { | |
1525 | .ctl_name = NET_IPV4_VS_TO_SA, | |
1526 | .procname = "timeout_synack", | |
1527 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYNACK], | |
1528 | .maxlen = sizeof(int), | |
1529 | .mode = 0644, | |
1530 | .proc_handler = &proc_dointvec_jiffies, | |
1531 | }, | |
1532 | { | |
1533 | .ctl_name = NET_IPV4_VS_TO_UDP, | |
1534 | .procname = "timeout_udp", | |
1535 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_UDP], | |
1536 | .maxlen = sizeof(int), | |
1537 | .mode = 0644, | |
1538 | .proc_handler = &proc_dointvec_jiffies, | |
1539 | }, | |
1540 | { | |
1541 | .ctl_name = NET_IPV4_VS_TO_ICMP, | |
1542 | .procname = "timeout_icmp", | |
1543 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_ICMP], | |
1544 | .maxlen = sizeof(int), | |
1545 | .mode = 0644, | |
1546 | .proc_handler = &proc_dointvec_jiffies, | |
1547 | }, | |
1548 | #endif | |
1549 | { | |
1550 | .ctl_name = NET_IPV4_VS_CACHE_BYPASS, | |
1551 | .procname = "cache_bypass", | |
1552 | .data = &sysctl_ip_vs_cache_bypass, | |
1553 | .maxlen = sizeof(int), | |
1554 | .mode = 0644, | |
1555 | .proc_handler = &proc_dointvec, | |
1556 | }, | |
1557 | { | |
1558 | .ctl_name = NET_IPV4_VS_EXPIRE_NODEST_CONN, | |
1559 | .procname = "expire_nodest_conn", | |
1560 | .data = &sysctl_ip_vs_expire_nodest_conn, | |
1561 | .maxlen = sizeof(int), | |
1562 | .mode = 0644, | |
1563 | .proc_handler = &proc_dointvec, | |
1564 | }, | |
1565 | { | |
1566 | .ctl_name = NET_IPV4_VS_EXPIRE_QUIESCENT_TEMPLATE, | |
1567 | .procname = "expire_quiescent_template", | |
1568 | .data = &sysctl_ip_vs_expire_quiescent_template, | |
1569 | .maxlen = sizeof(int), | |
1570 | .mode = 0644, | |
1571 | .proc_handler = &proc_dointvec, | |
1572 | }, | |
1573 | { | |
1574 | .ctl_name = NET_IPV4_VS_SYNC_THRESHOLD, | |
1575 | .procname = "sync_threshold", | |
1576 | .data = &sysctl_ip_vs_sync_threshold, | |
1577 | .maxlen = sizeof(sysctl_ip_vs_sync_threshold), | |
1578 | .mode = 0644, | |
1579 | .proc_handler = &proc_do_sync_threshold, | |
1580 | }, | |
1581 | { | |
1582 | .ctl_name = NET_IPV4_VS_NAT_ICMP_SEND, | |
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 | ||
1592 | static ctl_table vs_table[] = { | |
1593 | { | |
1594 | .ctl_name = NET_IPV4_VS, | |
1595 | .procname = "vs", | |
1596 | .mode = 0555, | |
1597 | .child = vs_vars | |
1598 | }, | |
1599 | { .ctl_name = 0 } | |
1600 | }; | |
1601 | ||
bf0ff9e5 | 1602 | static ctl_table ipvs_ipv4_table[] = { |
1da177e4 LT |
1603 | { |
1604 | .ctl_name = NET_IPV4, | |
1605 | .procname = "ipv4", | |
1606 | .mode = 0555, | |
1607 | .child = vs_table, | |
1608 | }, | |
1609 | { .ctl_name = 0 } | |
1610 | }; | |
1611 | ||
1612 | static ctl_table vs_root_table[] = { | |
1613 | { | |
1614 | .ctl_name = CTL_NET, | |
1615 | .procname = "net", | |
1616 | .mode = 0555, | |
bf0ff9e5 | 1617 | .child = ipvs_ipv4_table, |
1da177e4 LT |
1618 | }, |
1619 | { .ctl_name = 0 } | |
1620 | }; | |
1621 | ||
1622 | static struct ctl_table_header * sysctl_header; | |
1623 | ||
1624 | #ifdef CONFIG_PROC_FS | |
1625 | ||
1626 | struct ip_vs_iter { | |
1627 | struct list_head *table; | |
1628 | int bucket; | |
1629 | }; | |
1630 | ||
1631 | /* | |
1632 | * Write the contents of the VS rule table to a PROCfs file. | |
1633 | * (It is kept just for backward compatibility) | |
1634 | */ | |
1635 | static inline const char *ip_vs_fwd_name(unsigned flags) | |
1636 | { | |
1637 | switch (flags & IP_VS_CONN_F_FWD_MASK) { | |
1638 | case IP_VS_CONN_F_LOCALNODE: | |
1639 | return "Local"; | |
1640 | case IP_VS_CONN_F_TUNNEL: | |
1641 | return "Tunnel"; | |
1642 | case IP_VS_CONN_F_DROUTE: | |
1643 | return "Route"; | |
1644 | default: | |
1645 | return "Masq"; | |
1646 | } | |
1647 | } | |
1648 | ||
1649 | ||
1650 | /* Get the Nth entry in the two lists */ | |
1651 | static struct ip_vs_service *ip_vs_info_array(struct seq_file *seq, loff_t pos) | |
1652 | { | |
1653 | struct ip_vs_iter *iter = seq->private; | |
1654 | int idx; | |
1655 | struct ip_vs_service *svc; | |
1656 | ||
1657 | /* look in hash by protocol */ | |
1658 | for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
1659 | list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) { | |
1660 | if (pos-- == 0){ | |
1661 | iter->table = ip_vs_svc_table; | |
1662 | iter->bucket = idx; | |
1663 | return svc; | |
1664 | } | |
1665 | } | |
1666 | } | |
1667 | ||
1668 | /* keep looking in fwmark */ | |
1669 | for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
1670 | list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) { | |
1671 | if (pos-- == 0) { | |
1672 | iter->table = ip_vs_svc_fwm_table; | |
1673 | iter->bucket = idx; | |
1674 | return svc; | |
1675 | } | |
1676 | } | |
1677 | } | |
1678 | ||
1679 | return NULL; | |
1680 | } | |
1681 | ||
1682 | static void *ip_vs_info_seq_start(struct seq_file *seq, loff_t *pos) | |
1683 | { | |
1684 | ||
1685 | read_lock_bh(&__ip_vs_svc_lock); | |
1686 | return *pos ? ip_vs_info_array(seq, *pos - 1) : SEQ_START_TOKEN; | |
1687 | } | |
1688 | ||
1689 | ||
1690 | static void *ip_vs_info_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1691 | { | |
1692 | struct list_head *e; | |
1693 | struct ip_vs_iter *iter; | |
1694 | struct ip_vs_service *svc; | |
1695 | ||
1696 | ++*pos; | |
1697 | if (v == SEQ_START_TOKEN) | |
1698 | return ip_vs_info_array(seq,0); | |
1699 | ||
1700 | svc = v; | |
1701 | iter = seq->private; | |
1702 | ||
1703 | if (iter->table == ip_vs_svc_table) { | |
1704 | /* next service in table hashed by protocol */ | |
1705 | if ((e = svc->s_list.next) != &ip_vs_svc_table[iter->bucket]) | |
1706 | return list_entry(e, struct ip_vs_service, s_list); | |
1707 | ||
1708 | ||
1709 | while (++iter->bucket < IP_VS_SVC_TAB_SIZE) { | |
1710 | list_for_each_entry(svc,&ip_vs_svc_table[iter->bucket], | |
1711 | s_list) { | |
1712 | return svc; | |
1713 | } | |
1714 | } | |
1715 | ||
1716 | iter->table = ip_vs_svc_fwm_table; | |
1717 | iter->bucket = -1; | |
1718 | goto scan_fwmark; | |
1719 | } | |
1720 | ||
1721 | /* next service in hashed by fwmark */ | |
1722 | if ((e = svc->f_list.next) != &ip_vs_svc_fwm_table[iter->bucket]) | |
1723 | return list_entry(e, struct ip_vs_service, f_list); | |
1724 | ||
1725 | scan_fwmark: | |
1726 | while (++iter->bucket < IP_VS_SVC_TAB_SIZE) { | |
1727 | list_for_each_entry(svc, &ip_vs_svc_fwm_table[iter->bucket], | |
1728 | f_list) | |
1729 | return svc; | |
1730 | } | |
1731 | ||
1732 | return NULL; | |
1733 | } | |
1734 | ||
1735 | static void ip_vs_info_seq_stop(struct seq_file *seq, void *v) | |
1736 | { | |
1737 | read_unlock_bh(&__ip_vs_svc_lock); | |
1738 | } | |
1739 | ||
1740 | ||
1741 | static int ip_vs_info_seq_show(struct seq_file *seq, void *v) | |
1742 | { | |
1743 | if (v == SEQ_START_TOKEN) { | |
1744 | seq_printf(seq, | |
1745 | "IP Virtual Server version %d.%d.%d (size=%d)\n", | |
1746 | NVERSION(IP_VS_VERSION_CODE), IP_VS_CONN_TAB_SIZE); | |
1747 | seq_puts(seq, | |
1748 | "Prot LocalAddress:Port Scheduler Flags\n"); | |
1749 | seq_puts(seq, | |
1750 | " -> RemoteAddress:Port Forward Weight ActiveConn InActConn\n"); | |
1751 | } else { | |
1752 | const struct ip_vs_service *svc = v; | |
1753 | const struct ip_vs_iter *iter = seq->private; | |
1754 | const struct ip_vs_dest *dest; | |
1755 | ||
1756 | if (iter->table == ip_vs_svc_table) | |
1757 | seq_printf(seq, "%s %08X:%04X %s ", | |
1758 | ip_vs_proto_name(svc->protocol), | |
1759 | ntohl(svc->addr), | |
1760 | ntohs(svc->port), | |
1761 | svc->scheduler->name); | |
1762 | else | |
1763 | seq_printf(seq, "FWM %08X %s ", | |
1764 | svc->fwmark, svc->scheduler->name); | |
1765 | ||
1766 | if (svc->flags & IP_VS_SVC_F_PERSISTENT) | |
1767 | seq_printf(seq, "persistent %d %08X\n", | |
1768 | svc->timeout, | |
1769 | ntohl(svc->netmask)); | |
1770 | else | |
1771 | seq_putc(seq, '\n'); | |
1772 | ||
1773 | list_for_each_entry(dest, &svc->destinations, n_list) { | |
1774 | seq_printf(seq, | |
1775 | " -> %08X:%04X %-7s %-6d %-10d %-10d\n", | |
1776 | ntohl(dest->addr), ntohs(dest->port), | |
1777 | ip_vs_fwd_name(atomic_read(&dest->conn_flags)), | |
1778 | atomic_read(&dest->weight), | |
1779 | atomic_read(&dest->activeconns), | |
1780 | atomic_read(&dest->inactconns)); | |
1781 | } | |
1782 | } | |
1783 | return 0; | |
1784 | } | |
1785 | ||
1786 | static struct seq_operations ip_vs_info_seq_ops = { | |
1787 | .start = ip_vs_info_seq_start, | |
1788 | .next = ip_vs_info_seq_next, | |
1789 | .stop = ip_vs_info_seq_stop, | |
1790 | .show = ip_vs_info_seq_show, | |
1791 | }; | |
1792 | ||
1793 | static int ip_vs_info_open(struct inode *inode, struct file *file) | |
1794 | { | |
1795 | struct seq_file *seq; | |
1796 | int rc = -ENOMEM; | |
0da974f4 | 1797 | struct ip_vs_iter *s = kzalloc(sizeof(*s), GFP_KERNEL); |
1da177e4 LT |
1798 | |
1799 | if (!s) | |
1800 | goto out; | |
1801 | ||
1802 | rc = seq_open(file, &ip_vs_info_seq_ops); | |
1803 | if (rc) | |
1804 | goto out_kfree; | |
1805 | ||
1806 | seq = file->private_data; | |
1807 | seq->private = s; | |
1da177e4 LT |
1808 | out: |
1809 | return rc; | |
1810 | out_kfree: | |
1811 | kfree(s); | |
1812 | goto out; | |
1813 | } | |
1814 | ||
9a32144e | 1815 | static const struct file_operations ip_vs_info_fops = { |
1da177e4 LT |
1816 | .owner = THIS_MODULE, |
1817 | .open = ip_vs_info_open, | |
1818 | .read = seq_read, | |
1819 | .llseek = seq_lseek, | |
1820 | .release = seq_release_private, | |
1821 | }; | |
1822 | ||
1823 | #endif | |
1824 | ||
1825 | struct ip_vs_stats ip_vs_stats; | |
1826 | ||
1827 | #ifdef CONFIG_PROC_FS | |
1828 | static int ip_vs_stats_show(struct seq_file *seq, void *v) | |
1829 | { | |
1830 | ||
1831 | /* 01234567 01234567 01234567 0123456701234567 0123456701234567 */ | |
1832 | seq_puts(seq, | |
1833 | " Total Incoming Outgoing Incoming Outgoing\n"); | |
1834 | seq_printf(seq, | |
1835 | " Conns Packets Packets Bytes Bytes\n"); | |
1836 | ||
1837 | spin_lock_bh(&ip_vs_stats.lock); | |
1838 | seq_printf(seq, "%8X %8X %8X %16LX %16LX\n\n", ip_vs_stats.conns, | |
1839 | ip_vs_stats.inpkts, ip_vs_stats.outpkts, | |
1840 | (unsigned long long) ip_vs_stats.inbytes, | |
1841 | (unsigned long long) ip_vs_stats.outbytes); | |
1842 | ||
1843 | /* 01234567 01234567 01234567 0123456701234567 0123456701234567 */ | |
1844 | seq_puts(seq, | |
1845 | " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n"); | |
1846 | seq_printf(seq,"%8X %8X %8X %16X %16X\n", | |
1847 | ip_vs_stats.cps, | |
1848 | ip_vs_stats.inpps, | |
1849 | ip_vs_stats.outpps, | |
1850 | ip_vs_stats.inbps, | |
1851 | ip_vs_stats.outbps); | |
1852 | spin_unlock_bh(&ip_vs_stats.lock); | |
1853 | ||
1854 | return 0; | |
1855 | } | |
1856 | ||
1857 | static int ip_vs_stats_seq_open(struct inode *inode, struct file *file) | |
1858 | { | |
1859 | return single_open(file, ip_vs_stats_show, NULL); | |
1860 | } | |
1861 | ||
9a32144e | 1862 | static const struct file_operations ip_vs_stats_fops = { |
1da177e4 LT |
1863 | .owner = THIS_MODULE, |
1864 | .open = ip_vs_stats_seq_open, | |
1865 | .read = seq_read, | |
1866 | .llseek = seq_lseek, | |
1867 | .release = single_release, | |
1868 | }; | |
1869 | ||
1870 | #endif | |
1871 | ||
1872 | /* | |
1873 | * Set timeout values for tcp tcpfin udp in the timeout_table. | |
1874 | */ | |
1875 | static int ip_vs_set_timeout(struct ip_vs_timeout_user *u) | |
1876 | { | |
1877 | IP_VS_DBG(2, "Setting timeout tcp:%d tcpfin:%d udp:%d\n", | |
1878 | u->tcp_timeout, | |
1879 | u->tcp_fin_timeout, | |
1880 | u->udp_timeout); | |
1881 | ||
1882 | #ifdef CONFIG_IP_VS_PROTO_TCP | |
1883 | if (u->tcp_timeout) { | |
1884 | ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_ESTABLISHED] | |
1885 | = u->tcp_timeout * HZ; | |
1886 | } | |
1887 | ||
1888 | if (u->tcp_fin_timeout) { | |
1889 | ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_FIN_WAIT] | |
1890 | = u->tcp_fin_timeout * HZ; | |
1891 | } | |
1892 | #endif | |
1893 | ||
1894 | #ifdef CONFIG_IP_VS_PROTO_UDP | |
1895 | if (u->udp_timeout) { | |
1896 | ip_vs_protocol_udp.timeout_table[IP_VS_UDP_S_NORMAL] | |
1897 | = u->udp_timeout * HZ; | |
1898 | } | |
1899 | #endif | |
1900 | return 0; | |
1901 | } | |
1902 | ||
1903 | ||
1904 | #define SET_CMDID(cmd) (cmd - IP_VS_BASE_CTL) | |
1905 | #define SERVICE_ARG_LEN (sizeof(struct ip_vs_service_user)) | |
1906 | #define SVCDEST_ARG_LEN (sizeof(struct ip_vs_service_user) + \ | |
1907 | sizeof(struct ip_vs_dest_user)) | |
1908 | #define TIMEOUT_ARG_LEN (sizeof(struct ip_vs_timeout_user)) | |
1909 | #define DAEMON_ARG_LEN (sizeof(struct ip_vs_daemon_user)) | |
1910 | #define MAX_ARG_LEN SVCDEST_ARG_LEN | |
1911 | ||
9b5b5cff | 1912 | static const unsigned char set_arglen[SET_CMDID(IP_VS_SO_SET_MAX)+1] = { |
1da177e4 LT |
1913 | [SET_CMDID(IP_VS_SO_SET_ADD)] = SERVICE_ARG_LEN, |
1914 | [SET_CMDID(IP_VS_SO_SET_EDIT)] = SERVICE_ARG_LEN, | |
1915 | [SET_CMDID(IP_VS_SO_SET_DEL)] = SERVICE_ARG_LEN, | |
1916 | [SET_CMDID(IP_VS_SO_SET_FLUSH)] = 0, | |
1917 | [SET_CMDID(IP_VS_SO_SET_ADDDEST)] = SVCDEST_ARG_LEN, | |
1918 | [SET_CMDID(IP_VS_SO_SET_DELDEST)] = SVCDEST_ARG_LEN, | |
1919 | [SET_CMDID(IP_VS_SO_SET_EDITDEST)] = SVCDEST_ARG_LEN, | |
1920 | [SET_CMDID(IP_VS_SO_SET_TIMEOUT)] = TIMEOUT_ARG_LEN, | |
1921 | [SET_CMDID(IP_VS_SO_SET_STARTDAEMON)] = DAEMON_ARG_LEN, | |
1922 | [SET_CMDID(IP_VS_SO_SET_STOPDAEMON)] = DAEMON_ARG_LEN, | |
1923 | [SET_CMDID(IP_VS_SO_SET_ZERO)] = SERVICE_ARG_LEN, | |
1924 | }; | |
1925 | ||
1926 | static int | |
1927 | do_ip_vs_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len) | |
1928 | { | |
1929 | int ret; | |
1930 | unsigned char arg[MAX_ARG_LEN]; | |
1931 | struct ip_vs_service_user *usvc; | |
1932 | struct ip_vs_service *svc; | |
1933 | struct ip_vs_dest_user *udest; | |
1934 | ||
1935 | if (!capable(CAP_NET_ADMIN)) | |
1936 | return -EPERM; | |
1937 | ||
1938 | if (len != set_arglen[SET_CMDID(cmd)]) { | |
1939 | IP_VS_ERR("set_ctl: len %u != %u\n", | |
1940 | len, set_arglen[SET_CMDID(cmd)]); | |
1941 | return -EINVAL; | |
1942 | } | |
1943 | ||
1944 | if (copy_from_user(arg, user, len) != 0) | |
1945 | return -EFAULT; | |
1946 | ||
1947 | /* increase the module use count */ | |
1948 | ip_vs_use_count_inc(); | |
1949 | ||
14cc3e2b | 1950 | if (mutex_lock_interruptible(&__ip_vs_mutex)) { |
1da177e4 LT |
1951 | ret = -ERESTARTSYS; |
1952 | goto out_dec; | |
1953 | } | |
1954 | ||
1955 | if (cmd == IP_VS_SO_SET_FLUSH) { | |
1956 | /* Flush the virtual service */ | |
1957 | ret = ip_vs_flush(); | |
1958 | goto out_unlock; | |
1959 | } else if (cmd == IP_VS_SO_SET_TIMEOUT) { | |
1960 | /* Set timeout values for (tcp tcpfin udp) */ | |
1961 | ret = ip_vs_set_timeout((struct ip_vs_timeout_user *)arg); | |
1962 | goto out_unlock; | |
1963 | } else if (cmd == IP_VS_SO_SET_STARTDAEMON) { | |
1964 | struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg; | |
1965 | ret = start_sync_thread(dm->state, dm->mcast_ifn, dm->syncid); | |
1966 | goto out_unlock; | |
1967 | } else if (cmd == IP_VS_SO_SET_STOPDAEMON) { | |
1968 | struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg; | |
1969 | ret = stop_sync_thread(dm->state); | |
1970 | goto out_unlock; | |
1971 | } | |
1972 | ||
1973 | usvc = (struct ip_vs_service_user *)arg; | |
1974 | udest = (struct ip_vs_dest_user *)(usvc + 1); | |
1975 | ||
1976 | if (cmd == IP_VS_SO_SET_ZERO) { | |
1977 | /* if no service address is set, zero counters in all */ | |
1978 | if (!usvc->fwmark && !usvc->addr && !usvc->port) { | |
1979 | ret = ip_vs_zero_all(); | |
1980 | goto out_unlock; | |
1981 | } | |
1982 | } | |
1983 | ||
1984 | /* Check for valid protocol: TCP or UDP, even for fwmark!=0 */ | |
1985 | if (usvc->protocol!=IPPROTO_TCP && usvc->protocol!=IPPROTO_UDP) { | |
1986 | IP_VS_ERR("set_ctl: invalid protocol: %d %d.%d.%d.%d:%d %s\n", | |
1987 | usvc->protocol, NIPQUAD(usvc->addr), | |
1988 | ntohs(usvc->port), usvc->sched_name); | |
1989 | ret = -EFAULT; | |
1990 | goto out_unlock; | |
1991 | } | |
1992 | ||
1993 | /* Lookup the exact service by <protocol, addr, port> or fwmark */ | |
1994 | if (usvc->fwmark == 0) | |
1995 | svc = __ip_vs_service_get(usvc->protocol, | |
1996 | usvc->addr, usvc->port); | |
1997 | else | |
1998 | svc = __ip_vs_svc_fwm_get(usvc->fwmark); | |
1999 | ||
2000 | if (cmd != IP_VS_SO_SET_ADD | |
2001 | && (svc == NULL || svc->protocol != usvc->protocol)) { | |
2002 | ret = -ESRCH; | |
2003 | goto out_unlock; | |
2004 | } | |
2005 | ||
2006 | switch (cmd) { | |
2007 | case IP_VS_SO_SET_ADD: | |
2008 | if (svc != NULL) | |
2009 | ret = -EEXIST; | |
2010 | else | |
2011 | ret = ip_vs_add_service(usvc, &svc); | |
2012 | break; | |
2013 | case IP_VS_SO_SET_EDIT: | |
2014 | ret = ip_vs_edit_service(svc, usvc); | |
2015 | break; | |
2016 | case IP_VS_SO_SET_DEL: | |
2017 | ret = ip_vs_del_service(svc); | |
2018 | if (!ret) | |
2019 | goto out_unlock; | |
2020 | break; | |
2021 | case IP_VS_SO_SET_ZERO: | |
2022 | ret = ip_vs_zero_service(svc); | |
2023 | break; | |
2024 | case IP_VS_SO_SET_ADDDEST: | |
2025 | ret = ip_vs_add_dest(svc, udest); | |
2026 | break; | |
2027 | case IP_VS_SO_SET_EDITDEST: | |
2028 | ret = ip_vs_edit_dest(svc, udest); | |
2029 | break; | |
2030 | case IP_VS_SO_SET_DELDEST: | |
2031 | ret = ip_vs_del_dest(svc, udest); | |
2032 | break; | |
2033 | default: | |
2034 | ret = -EINVAL; | |
2035 | } | |
2036 | ||
2037 | if (svc) | |
2038 | ip_vs_service_put(svc); | |
2039 | ||
2040 | out_unlock: | |
14cc3e2b | 2041 | mutex_unlock(&__ip_vs_mutex); |
1da177e4 LT |
2042 | out_dec: |
2043 | /* decrease the module use count */ | |
2044 | ip_vs_use_count_dec(); | |
2045 | ||
2046 | return ret; | |
2047 | } | |
2048 | ||
2049 | ||
2050 | static void | |
2051 | ip_vs_copy_stats(struct ip_vs_stats_user *dst, struct ip_vs_stats *src) | |
2052 | { | |
2053 | spin_lock_bh(&src->lock); | |
2054 | memcpy(dst, src, (char*)&src->lock - (char*)src); | |
2055 | spin_unlock_bh(&src->lock); | |
2056 | } | |
2057 | ||
2058 | static void | |
2059 | ip_vs_copy_service(struct ip_vs_service_entry *dst, struct ip_vs_service *src) | |
2060 | { | |
2061 | dst->protocol = src->protocol; | |
2062 | dst->addr = src->addr; | |
2063 | dst->port = src->port; | |
2064 | dst->fwmark = src->fwmark; | |
4da62fc7 | 2065 | strlcpy(dst->sched_name, src->scheduler->name, sizeof(dst->sched_name)); |
1da177e4 LT |
2066 | dst->flags = src->flags; |
2067 | dst->timeout = src->timeout / HZ; | |
2068 | dst->netmask = src->netmask; | |
2069 | dst->num_dests = src->num_dests; | |
2070 | ip_vs_copy_stats(&dst->stats, &src->stats); | |
2071 | } | |
2072 | ||
2073 | static inline int | |
2074 | __ip_vs_get_service_entries(const struct ip_vs_get_services *get, | |
2075 | struct ip_vs_get_services __user *uptr) | |
2076 | { | |
2077 | int idx, count=0; | |
2078 | struct ip_vs_service *svc; | |
2079 | struct ip_vs_service_entry entry; | |
2080 | int ret = 0; | |
2081 | ||
2082 | for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
2083 | list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) { | |
2084 | if (count >= get->num_services) | |
2085 | goto out; | |
4da62fc7 | 2086 | memset(&entry, 0, sizeof(entry)); |
1da177e4 LT |
2087 | ip_vs_copy_service(&entry, svc); |
2088 | if (copy_to_user(&uptr->entrytable[count], | |
2089 | &entry, sizeof(entry))) { | |
2090 | ret = -EFAULT; | |
2091 | goto out; | |
2092 | } | |
2093 | count++; | |
2094 | } | |
2095 | } | |
2096 | ||
2097 | for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
2098 | list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) { | |
2099 | if (count >= get->num_services) | |
2100 | goto out; | |
4da62fc7 | 2101 | memset(&entry, 0, sizeof(entry)); |
1da177e4 LT |
2102 | ip_vs_copy_service(&entry, svc); |
2103 | if (copy_to_user(&uptr->entrytable[count], | |
2104 | &entry, sizeof(entry))) { | |
2105 | ret = -EFAULT; | |
2106 | goto out; | |
2107 | } | |
2108 | count++; | |
2109 | } | |
2110 | } | |
2111 | out: | |
2112 | return ret; | |
2113 | } | |
2114 | ||
2115 | static inline int | |
2116 | __ip_vs_get_dest_entries(const struct ip_vs_get_dests *get, | |
2117 | struct ip_vs_get_dests __user *uptr) | |
2118 | { | |
2119 | struct ip_vs_service *svc; | |
2120 | int ret = 0; | |
2121 | ||
2122 | if (get->fwmark) | |
2123 | svc = __ip_vs_svc_fwm_get(get->fwmark); | |
2124 | else | |
2125 | svc = __ip_vs_service_get(get->protocol, | |
2126 | get->addr, get->port); | |
2127 | if (svc) { | |
2128 | int count = 0; | |
2129 | struct ip_vs_dest *dest; | |
2130 | struct ip_vs_dest_entry entry; | |
2131 | ||
2132 | list_for_each_entry(dest, &svc->destinations, n_list) { | |
2133 | if (count >= get->num_dests) | |
2134 | break; | |
2135 | ||
2136 | entry.addr = dest->addr; | |
2137 | entry.port = dest->port; | |
2138 | entry.conn_flags = atomic_read(&dest->conn_flags); | |
2139 | entry.weight = atomic_read(&dest->weight); | |
2140 | entry.u_threshold = dest->u_threshold; | |
2141 | entry.l_threshold = dest->l_threshold; | |
2142 | entry.activeconns = atomic_read(&dest->activeconns); | |
2143 | entry.inactconns = atomic_read(&dest->inactconns); | |
2144 | entry.persistconns = atomic_read(&dest->persistconns); | |
2145 | ip_vs_copy_stats(&entry.stats, &dest->stats); | |
2146 | if (copy_to_user(&uptr->entrytable[count], | |
2147 | &entry, sizeof(entry))) { | |
2148 | ret = -EFAULT; | |
2149 | break; | |
2150 | } | |
2151 | count++; | |
2152 | } | |
2153 | ip_vs_service_put(svc); | |
2154 | } else | |
2155 | ret = -ESRCH; | |
2156 | return ret; | |
2157 | } | |
2158 | ||
2159 | static inline void | |
2160 | __ip_vs_get_timeouts(struct ip_vs_timeout_user *u) | |
2161 | { | |
2162 | #ifdef CONFIG_IP_VS_PROTO_TCP | |
2163 | u->tcp_timeout = | |
2164 | ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_ESTABLISHED] / HZ; | |
2165 | u->tcp_fin_timeout = | |
2166 | ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_FIN_WAIT] / HZ; | |
2167 | #endif | |
2168 | #ifdef CONFIG_IP_VS_PROTO_UDP | |
2169 | u->udp_timeout = | |
2170 | ip_vs_protocol_udp.timeout_table[IP_VS_UDP_S_NORMAL] / HZ; | |
2171 | #endif | |
2172 | } | |
2173 | ||
2174 | ||
2175 | #define GET_CMDID(cmd) (cmd - IP_VS_BASE_CTL) | |
2176 | #define GET_INFO_ARG_LEN (sizeof(struct ip_vs_getinfo)) | |
2177 | #define GET_SERVICES_ARG_LEN (sizeof(struct ip_vs_get_services)) | |
2178 | #define GET_SERVICE_ARG_LEN (sizeof(struct ip_vs_service_entry)) | |
2179 | #define GET_DESTS_ARG_LEN (sizeof(struct ip_vs_get_dests)) | |
2180 | #define GET_TIMEOUT_ARG_LEN (sizeof(struct ip_vs_timeout_user)) | |
2181 | #define GET_DAEMON_ARG_LEN (sizeof(struct ip_vs_daemon_user) * 2) | |
2182 | ||
9b5b5cff | 2183 | static const unsigned char get_arglen[GET_CMDID(IP_VS_SO_GET_MAX)+1] = { |
1da177e4 LT |
2184 | [GET_CMDID(IP_VS_SO_GET_VERSION)] = 64, |
2185 | [GET_CMDID(IP_VS_SO_GET_INFO)] = GET_INFO_ARG_LEN, | |
2186 | [GET_CMDID(IP_VS_SO_GET_SERVICES)] = GET_SERVICES_ARG_LEN, | |
2187 | [GET_CMDID(IP_VS_SO_GET_SERVICE)] = GET_SERVICE_ARG_LEN, | |
2188 | [GET_CMDID(IP_VS_SO_GET_DESTS)] = GET_DESTS_ARG_LEN, | |
2189 | [GET_CMDID(IP_VS_SO_GET_TIMEOUT)] = GET_TIMEOUT_ARG_LEN, | |
2190 | [GET_CMDID(IP_VS_SO_GET_DAEMON)] = GET_DAEMON_ARG_LEN, | |
2191 | }; | |
2192 | ||
2193 | static int | |
2194 | do_ip_vs_get_ctl(struct sock *sk, int cmd, void __user *user, int *len) | |
2195 | { | |
2196 | unsigned char arg[128]; | |
2197 | int ret = 0; | |
2198 | ||
2199 | if (!capable(CAP_NET_ADMIN)) | |
2200 | return -EPERM; | |
2201 | ||
2202 | if (*len < get_arglen[GET_CMDID(cmd)]) { | |
2203 | IP_VS_ERR("get_ctl: len %u < %u\n", | |
2204 | *len, get_arglen[GET_CMDID(cmd)]); | |
2205 | return -EINVAL; | |
2206 | } | |
2207 | ||
2208 | if (copy_from_user(arg, user, get_arglen[GET_CMDID(cmd)]) != 0) | |
2209 | return -EFAULT; | |
2210 | ||
14cc3e2b | 2211 | if (mutex_lock_interruptible(&__ip_vs_mutex)) |
1da177e4 LT |
2212 | return -ERESTARTSYS; |
2213 | ||
2214 | switch (cmd) { | |
2215 | case IP_VS_SO_GET_VERSION: | |
2216 | { | |
2217 | char buf[64]; | |
2218 | ||
2219 | sprintf(buf, "IP Virtual Server version %d.%d.%d (size=%d)", | |
2220 | NVERSION(IP_VS_VERSION_CODE), IP_VS_CONN_TAB_SIZE); | |
2221 | if (copy_to_user(user, buf, strlen(buf)+1) != 0) { | |
2222 | ret = -EFAULT; | |
2223 | goto out; | |
2224 | } | |
2225 | *len = strlen(buf)+1; | |
2226 | } | |
2227 | break; | |
2228 | ||
2229 | case IP_VS_SO_GET_INFO: | |
2230 | { | |
2231 | struct ip_vs_getinfo info; | |
2232 | info.version = IP_VS_VERSION_CODE; | |
2233 | info.size = IP_VS_CONN_TAB_SIZE; | |
2234 | info.num_services = ip_vs_num_services; | |
2235 | if (copy_to_user(user, &info, sizeof(info)) != 0) | |
2236 | ret = -EFAULT; | |
2237 | } | |
2238 | break; | |
2239 | ||
2240 | case IP_VS_SO_GET_SERVICES: | |
2241 | { | |
2242 | struct ip_vs_get_services *get; | |
2243 | int size; | |
2244 | ||
2245 | get = (struct ip_vs_get_services *)arg; | |
2246 | size = sizeof(*get) + | |
2247 | sizeof(struct ip_vs_service_entry) * get->num_services; | |
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_service_entries(get, user); | |
2254 | } | |
2255 | break; | |
2256 | ||
2257 | case IP_VS_SO_GET_SERVICE: | |
2258 | { | |
2259 | struct ip_vs_service_entry *entry; | |
2260 | struct ip_vs_service *svc; | |
2261 | ||
2262 | entry = (struct ip_vs_service_entry *)arg; | |
2263 | if (entry->fwmark) | |
2264 | svc = __ip_vs_svc_fwm_get(entry->fwmark); | |
2265 | else | |
2266 | svc = __ip_vs_service_get(entry->protocol, | |
2267 | entry->addr, entry->port); | |
2268 | if (svc) { | |
2269 | ip_vs_copy_service(entry, svc); | |
2270 | if (copy_to_user(user, entry, sizeof(*entry)) != 0) | |
2271 | ret = -EFAULT; | |
2272 | ip_vs_service_put(svc); | |
2273 | } else | |
2274 | ret = -ESRCH; | |
2275 | } | |
2276 | break; | |
2277 | ||
2278 | case IP_VS_SO_GET_DESTS: | |
2279 | { | |
2280 | struct ip_vs_get_dests *get; | |
2281 | int size; | |
2282 | ||
2283 | get = (struct ip_vs_get_dests *)arg; | |
2284 | size = sizeof(*get) + | |
2285 | sizeof(struct ip_vs_dest_entry) * get->num_dests; | |
2286 | if (*len != size) { | |
2287 | IP_VS_ERR("length: %u != %u\n", *len, size); | |
2288 | ret = -EINVAL; | |
2289 | goto out; | |
2290 | } | |
2291 | ret = __ip_vs_get_dest_entries(get, user); | |
2292 | } | |
2293 | break; | |
2294 | ||
2295 | case IP_VS_SO_GET_TIMEOUT: | |
2296 | { | |
2297 | struct ip_vs_timeout_user t; | |
2298 | ||
2299 | __ip_vs_get_timeouts(&t); | |
2300 | if (copy_to_user(user, &t, sizeof(t)) != 0) | |
2301 | ret = -EFAULT; | |
2302 | } | |
2303 | break; | |
2304 | ||
2305 | case IP_VS_SO_GET_DAEMON: | |
2306 | { | |
2307 | struct ip_vs_daemon_user d[2]; | |
2308 | ||
2309 | memset(&d, 0, sizeof(d)); | |
2310 | if (ip_vs_sync_state & IP_VS_STATE_MASTER) { | |
2311 | d[0].state = IP_VS_STATE_MASTER; | |
4da62fc7 | 2312 | strlcpy(d[0].mcast_ifn, ip_vs_master_mcast_ifn, sizeof(d[0].mcast_ifn)); |
1da177e4 LT |
2313 | d[0].syncid = ip_vs_master_syncid; |
2314 | } | |
2315 | if (ip_vs_sync_state & IP_VS_STATE_BACKUP) { | |
2316 | d[1].state = IP_VS_STATE_BACKUP; | |
4da62fc7 | 2317 | strlcpy(d[1].mcast_ifn, ip_vs_backup_mcast_ifn, sizeof(d[1].mcast_ifn)); |
1da177e4 LT |
2318 | d[1].syncid = ip_vs_backup_syncid; |
2319 | } | |
2320 | if (copy_to_user(user, &d, sizeof(d)) != 0) | |
2321 | ret = -EFAULT; | |
2322 | } | |
2323 | break; | |
2324 | ||
2325 | default: | |
2326 | ret = -EINVAL; | |
2327 | } | |
2328 | ||
2329 | out: | |
14cc3e2b | 2330 | mutex_unlock(&__ip_vs_mutex); |
1da177e4 LT |
2331 | return ret; |
2332 | } | |
2333 | ||
2334 | ||
2335 | static struct nf_sockopt_ops ip_vs_sockopts = { | |
2336 | .pf = PF_INET, | |
2337 | .set_optmin = IP_VS_BASE_CTL, | |
2338 | .set_optmax = IP_VS_SO_SET_MAX+1, | |
2339 | .set = do_ip_vs_set_ctl, | |
2340 | .get_optmin = IP_VS_BASE_CTL, | |
2341 | .get_optmax = IP_VS_SO_GET_MAX+1, | |
2342 | .get = do_ip_vs_get_ctl, | |
2343 | }; | |
2344 | ||
2345 | ||
2346 | int ip_vs_control_init(void) | |
2347 | { | |
2348 | int ret; | |
2349 | int idx; | |
2350 | ||
2351 | EnterFunction(2); | |
2352 | ||
2353 | ret = nf_register_sockopt(&ip_vs_sockopts); | |
2354 | if (ret) { | |
2355 | IP_VS_ERR("cannot register sockopt.\n"); | |
2356 | return ret; | |
2357 | } | |
2358 | ||
2359 | proc_net_fops_create("ip_vs", 0, &ip_vs_info_fops); | |
2360 | proc_net_fops_create("ip_vs_stats",0, &ip_vs_stats_fops); | |
2361 | ||
2362 | sysctl_header = register_sysctl_table(vs_root_table, 0); | |
2363 | ||
2364 | /* Initialize ip_vs_svc_table, ip_vs_svc_fwm_table, ip_vs_rtable */ | |
2365 | for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
2366 | INIT_LIST_HEAD(&ip_vs_svc_table[idx]); | |
2367 | INIT_LIST_HEAD(&ip_vs_svc_fwm_table[idx]); | |
2368 | } | |
2369 | for(idx = 0; idx < IP_VS_RTAB_SIZE; idx++) { | |
2370 | INIT_LIST_HEAD(&ip_vs_rtable[idx]); | |
2371 | } | |
2372 | ||
2373 | memset(&ip_vs_stats, 0, sizeof(ip_vs_stats)); | |
2374 | spin_lock_init(&ip_vs_stats.lock); | |
2375 | ip_vs_new_estimator(&ip_vs_stats); | |
2376 | ||
2377 | /* Hook the defense timer */ | |
2378 | schedule_delayed_work(&defense_work, DEFENSE_TIMER_PERIOD); | |
2379 | ||
2380 | LeaveFunction(2); | |
2381 | return 0; | |
2382 | } | |
2383 | ||
2384 | ||
2385 | void ip_vs_control_cleanup(void) | |
2386 | { | |
2387 | EnterFunction(2); | |
2388 | ip_vs_trash_cleanup(); | |
2389 | cancel_rearming_delayed_work(&defense_work); | |
2390 | ip_vs_kill_estimator(&ip_vs_stats); | |
2391 | unregister_sysctl_table(sysctl_header); | |
2392 | proc_net_remove("ip_vs_stats"); | |
2393 | proc_net_remove("ip_vs"); | |
2394 | nf_unregister_sockopt(&ip_vs_sockopts); | |
2395 | LeaveFunction(2); | |
2396 | } |