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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * IPVS An implementation of the IP virtual server support for the | |
3 | * LINUX operating system. IPVS is now implemented as a module | |
4 | * over the NetFilter framework. IPVS can be used to build a | |
5 | * high-performance and highly available server based on a | |
6 | * cluster of servers. | |
7 | * | |
1da177e4 LT |
8 | * Authors: Wensong Zhang <wensong@linuxvirtualserver.org> |
9 | * Peter Kese <peter.kese@ijs.si> | |
10 | * Julian Anastasov <ja@ssi.bg> | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or | |
13 | * modify it under the terms of the GNU General Public License | |
14 | * as published by the Free Software Foundation; either version | |
15 | * 2 of the License, or (at your option) any later version. | |
16 | * | |
17 | * Changes: | |
18 | * | |
19 | */ | |
20 | ||
21 | #include <linux/module.h> | |
22 | #include <linux/init.h> | |
23 | #include <linux/types.h> | |
4fc268d2 | 24 | #include <linux/capability.h> |
1da177e4 LT |
25 | #include <linux/fs.h> |
26 | #include <linux/sysctl.h> | |
27 | #include <linux/proc_fs.h> | |
28 | #include <linux/workqueue.h> | |
29 | #include <linux/swap.h> | |
1da177e4 LT |
30 | #include <linux/seq_file.h> |
31 | ||
32 | #include <linux/netfilter.h> | |
33 | #include <linux/netfilter_ipv4.h> | |
14cc3e2b | 34 | #include <linux/mutex.h> |
1da177e4 | 35 | |
457c4cbc | 36 | #include <net/net_namespace.h> |
1da177e4 | 37 | #include <net/ip.h> |
09571c7a VB |
38 | #ifdef CONFIG_IP_VS_IPV6 |
39 | #include <net/ipv6.h> | |
40 | #include <net/ip6_route.h> | |
41 | #endif | |
14c85021 | 42 | #include <net/route.h> |
1da177e4 | 43 | #include <net/sock.h> |
9a812198 | 44 | #include <net/genetlink.h> |
1da177e4 LT |
45 | |
46 | #include <asm/uaccess.h> | |
47 | ||
48 | #include <net/ip_vs.h> | |
49 | ||
50 | /* semaphore for IPVS sockopts. And, [gs]etsockopt may sleep. */ | |
14cc3e2b | 51 | static DEFINE_MUTEX(__ip_vs_mutex); |
1da177e4 LT |
52 | |
53 | /* lock for service table */ | |
54 | static DEFINE_RWLOCK(__ip_vs_svc_lock); | |
55 | ||
56 | /* lock for table with the real services */ | |
57 | static DEFINE_RWLOCK(__ip_vs_rs_lock); | |
58 | ||
59 | /* lock for state and timeout tables */ | |
60 | static DEFINE_RWLOCK(__ip_vs_securetcp_lock); | |
61 | ||
62 | /* lock for drop entry handling */ | |
63 | static DEFINE_SPINLOCK(__ip_vs_dropentry_lock); | |
64 | ||
65 | /* lock for drop packet handling */ | |
66 | static DEFINE_SPINLOCK(__ip_vs_droppacket_lock); | |
67 | ||
68 | /* 1/rate drop and drop-entry variables */ | |
69 | int ip_vs_drop_rate = 0; | |
70 | int ip_vs_drop_counter = 0; | |
71 | static atomic_t ip_vs_dropentry = ATOMIC_INIT(0); | |
72 | ||
73 | /* number of virtual services */ | |
74 | static int ip_vs_num_services = 0; | |
75 | ||
76 | /* sysctl variables */ | |
77 | static int sysctl_ip_vs_drop_entry = 0; | |
78 | static int sysctl_ip_vs_drop_packet = 0; | |
79 | static int sysctl_ip_vs_secure_tcp = 0; | |
80 | static int sysctl_ip_vs_amemthresh = 1024; | |
81 | static int sysctl_ip_vs_am_droprate = 10; | |
82 | int sysctl_ip_vs_cache_bypass = 0; | |
83 | int sysctl_ip_vs_expire_nodest_conn = 0; | |
84 | int sysctl_ip_vs_expire_quiescent_template = 0; | |
85 | int sysctl_ip_vs_sync_threshold[2] = { 3, 50 }; | |
86 | int sysctl_ip_vs_nat_icmp_send = 0; | |
87 | ||
88 | ||
89 | #ifdef CONFIG_IP_VS_DEBUG | |
90 | static int sysctl_ip_vs_debug_level = 0; | |
91 | ||
92 | int ip_vs_get_debug_level(void) | |
93 | { | |
94 | return sysctl_ip_vs_debug_level; | |
95 | } | |
96 | #endif | |
97 | ||
09571c7a VB |
98 | #ifdef CONFIG_IP_VS_IPV6 |
99 | /* Taken from rt6_fill_node() in net/ipv6/route.c, is there a better way? */ | |
100 | static int __ip_vs_addr_is_local_v6(const struct in6_addr *addr) | |
101 | { | |
102 | struct rt6_info *rt; | |
103 | struct flowi fl = { | |
104 | .oif = 0, | |
105 | .nl_u = { | |
106 | .ip6_u = { | |
107 | .daddr = *addr, | |
108 | .saddr = { .s6_addr32 = {0, 0, 0, 0} }, } }, | |
109 | }; | |
110 | ||
111 | rt = (struct rt6_info *)ip6_route_output(&init_net, NULL, &fl); | |
112 | if (rt && rt->rt6i_dev && (rt->rt6i_dev->flags & IFF_LOOPBACK)) | |
113 | return 1; | |
114 | ||
115 | return 0; | |
116 | } | |
117 | #endif | |
1da177e4 | 118 | /* |
af9debd4 JA |
119 | * update_defense_level is called from keventd and from sysctl, |
120 | * so it needs to protect itself from softirqs | |
1da177e4 LT |
121 | */ |
122 | static void update_defense_level(void) | |
123 | { | |
124 | struct sysinfo i; | |
125 | static int old_secure_tcp = 0; | |
126 | int availmem; | |
127 | int nomem; | |
128 | int to_change = -1; | |
129 | ||
130 | /* we only count free and buffered memory (in pages) */ | |
131 | si_meminfo(&i); | |
132 | availmem = i.freeram + i.bufferram; | |
133 | /* however in linux 2.5 the i.bufferram is total page cache size, | |
134 | we need adjust it */ | |
135 | /* si_swapinfo(&i); */ | |
136 | /* availmem = availmem - (i.totalswap - i.freeswap); */ | |
137 | ||
138 | nomem = (availmem < sysctl_ip_vs_amemthresh); | |
139 | ||
af9debd4 JA |
140 | local_bh_disable(); |
141 | ||
1da177e4 LT |
142 | /* drop_entry */ |
143 | spin_lock(&__ip_vs_dropentry_lock); | |
144 | switch (sysctl_ip_vs_drop_entry) { | |
145 | case 0: | |
146 | atomic_set(&ip_vs_dropentry, 0); | |
147 | break; | |
148 | case 1: | |
149 | if (nomem) { | |
150 | atomic_set(&ip_vs_dropentry, 1); | |
151 | sysctl_ip_vs_drop_entry = 2; | |
152 | } else { | |
153 | atomic_set(&ip_vs_dropentry, 0); | |
154 | } | |
155 | break; | |
156 | case 2: | |
157 | if (nomem) { | |
158 | atomic_set(&ip_vs_dropentry, 1); | |
159 | } else { | |
160 | atomic_set(&ip_vs_dropentry, 0); | |
161 | sysctl_ip_vs_drop_entry = 1; | |
162 | }; | |
163 | break; | |
164 | case 3: | |
165 | atomic_set(&ip_vs_dropentry, 1); | |
166 | break; | |
167 | } | |
168 | spin_unlock(&__ip_vs_dropentry_lock); | |
169 | ||
170 | /* drop_packet */ | |
171 | spin_lock(&__ip_vs_droppacket_lock); | |
172 | switch (sysctl_ip_vs_drop_packet) { | |
173 | case 0: | |
174 | ip_vs_drop_rate = 0; | |
175 | break; | |
176 | case 1: | |
177 | if (nomem) { | |
178 | ip_vs_drop_rate = ip_vs_drop_counter | |
179 | = sysctl_ip_vs_amemthresh / | |
180 | (sysctl_ip_vs_amemthresh-availmem); | |
181 | sysctl_ip_vs_drop_packet = 2; | |
182 | } else { | |
183 | ip_vs_drop_rate = 0; | |
184 | } | |
185 | break; | |
186 | case 2: | |
187 | if (nomem) { | |
188 | ip_vs_drop_rate = ip_vs_drop_counter | |
189 | = sysctl_ip_vs_amemthresh / | |
190 | (sysctl_ip_vs_amemthresh-availmem); | |
191 | } else { | |
192 | ip_vs_drop_rate = 0; | |
193 | sysctl_ip_vs_drop_packet = 1; | |
194 | } | |
195 | break; | |
196 | case 3: | |
197 | ip_vs_drop_rate = sysctl_ip_vs_am_droprate; | |
198 | break; | |
199 | } | |
200 | spin_unlock(&__ip_vs_droppacket_lock); | |
201 | ||
202 | /* secure_tcp */ | |
203 | write_lock(&__ip_vs_securetcp_lock); | |
204 | switch (sysctl_ip_vs_secure_tcp) { | |
205 | case 0: | |
206 | if (old_secure_tcp >= 2) | |
207 | to_change = 0; | |
208 | break; | |
209 | case 1: | |
210 | if (nomem) { | |
211 | if (old_secure_tcp < 2) | |
212 | to_change = 1; | |
213 | sysctl_ip_vs_secure_tcp = 2; | |
214 | } else { | |
215 | if (old_secure_tcp >= 2) | |
216 | to_change = 0; | |
217 | } | |
218 | break; | |
219 | case 2: | |
220 | if (nomem) { | |
221 | if (old_secure_tcp < 2) | |
222 | to_change = 1; | |
223 | } else { | |
224 | if (old_secure_tcp >= 2) | |
225 | to_change = 0; | |
226 | sysctl_ip_vs_secure_tcp = 1; | |
227 | } | |
228 | break; | |
229 | case 3: | |
230 | if (old_secure_tcp < 2) | |
231 | to_change = 1; | |
232 | break; | |
233 | } | |
234 | old_secure_tcp = sysctl_ip_vs_secure_tcp; | |
235 | if (to_change >= 0) | |
236 | ip_vs_protocol_timeout_change(sysctl_ip_vs_secure_tcp>1); | |
237 | write_unlock(&__ip_vs_securetcp_lock); | |
af9debd4 JA |
238 | |
239 | local_bh_enable(); | |
1da177e4 LT |
240 | } |
241 | ||
242 | ||
243 | /* | |
244 | * Timer for checking the defense | |
245 | */ | |
246 | #define DEFENSE_TIMER_PERIOD 1*HZ | |
c4028958 DH |
247 | static void defense_work_handler(struct work_struct *work); |
248 | static DECLARE_DELAYED_WORK(defense_work, defense_work_handler); | |
1da177e4 | 249 | |
c4028958 | 250 | static void defense_work_handler(struct work_struct *work) |
1da177e4 LT |
251 | { |
252 | update_defense_level(); | |
253 | if (atomic_read(&ip_vs_dropentry)) | |
254 | ip_vs_random_dropentry(); | |
255 | ||
256 | schedule_delayed_work(&defense_work, DEFENSE_TIMER_PERIOD); | |
257 | } | |
258 | ||
259 | int | |
260 | ip_vs_use_count_inc(void) | |
261 | { | |
262 | return try_module_get(THIS_MODULE); | |
263 | } | |
264 | ||
265 | void | |
266 | ip_vs_use_count_dec(void) | |
267 | { | |
268 | module_put(THIS_MODULE); | |
269 | } | |
270 | ||
271 | ||
272 | /* | |
273 | * Hash table: for virtual service lookups | |
274 | */ | |
275 | #define IP_VS_SVC_TAB_BITS 8 | |
276 | #define IP_VS_SVC_TAB_SIZE (1 << IP_VS_SVC_TAB_BITS) | |
277 | #define IP_VS_SVC_TAB_MASK (IP_VS_SVC_TAB_SIZE - 1) | |
278 | ||
279 | /* the service table hashed by <protocol, addr, port> */ | |
280 | static struct list_head ip_vs_svc_table[IP_VS_SVC_TAB_SIZE]; | |
281 | /* the service table hashed by fwmark */ | |
282 | static struct list_head ip_vs_svc_fwm_table[IP_VS_SVC_TAB_SIZE]; | |
283 | ||
284 | /* | |
285 | * Hash table: for real service lookups | |
286 | */ | |
287 | #define IP_VS_RTAB_BITS 4 | |
288 | #define IP_VS_RTAB_SIZE (1 << IP_VS_RTAB_BITS) | |
289 | #define IP_VS_RTAB_MASK (IP_VS_RTAB_SIZE - 1) | |
290 | ||
291 | static struct list_head ip_vs_rtable[IP_VS_RTAB_SIZE]; | |
292 | ||
293 | /* | |
294 | * Trash for destinations | |
295 | */ | |
296 | static LIST_HEAD(ip_vs_dest_trash); | |
297 | ||
298 | /* | |
299 | * FTP & NULL virtual service counters | |
300 | */ | |
301 | static atomic_t ip_vs_ftpsvc_counter = ATOMIC_INIT(0); | |
302 | static atomic_t ip_vs_nullsvc_counter = ATOMIC_INIT(0); | |
303 | ||
304 | ||
305 | /* | |
306 | * Returns hash value for virtual service | |
307 | */ | |
308 | static __inline__ unsigned | |
b18610de JV |
309 | ip_vs_svc_hashkey(int af, unsigned proto, const union nf_inet_addr *addr, |
310 | __be16 port) | |
1da177e4 LT |
311 | { |
312 | register unsigned porth = ntohs(port); | |
b18610de | 313 | __be32 addr_fold = addr->ip; |
1da177e4 | 314 | |
b18610de JV |
315 | #ifdef CONFIG_IP_VS_IPV6 |
316 | if (af == AF_INET6) | |
317 | addr_fold = addr->ip6[0]^addr->ip6[1]^ | |
318 | addr->ip6[2]^addr->ip6[3]; | |
319 | #endif | |
320 | ||
321 | return (proto^ntohl(addr_fold)^(porth>>IP_VS_SVC_TAB_BITS)^porth) | |
1da177e4 LT |
322 | & IP_VS_SVC_TAB_MASK; |
323 | } | |
324 | ||
325 | /* | |
326 | * Returns hash value of fwmark for virtual service lookup | |
327 | */ | |
328 | static __inline__ unsigned ip_vs_svc_fwm_hashkey(__u32 fwmark) | |
329 | { | |
330 | return fwmark & IP_VS_SVC_TAB_MASK; | |
331 | } | |
332 | ||
333 | /* | |
334 | * Hashes a service in the ip_vs_svc_table by <proto,addr,port> | |
335 | * or in the ip_vs_svc_fwm_table by fwmark. | |
336 | * Should be called with locked tables. | |
337 | */ | |
338 | static int ip_vs_svc_hash(struct ip_vs_service *svc) | |
339 | { | |
340 | unsigned hash; | |
341 | ||
342 | if (svc->flags & IP_VS_SVC_F_HASHED) { | |
343 | IP_VS_ERR("ip_vs_svc_hash(): request for already hashed, " | |
344 | "called from %p\n", __builtin_return_address(0)); | |
345 | return 0; | |
346 | } | |
347 | ||
348 | if (svc->fwmark == 0) { | |
349 | /* | |
350 | * Hash it by <protocol,addr,port> in ip_vs_svc_table | |
351 | */ | |
b18610de | 352 | hash = ip_vs_svc_hashkey(svc->af, svc->protocol, &svc->addr, |
e7ade46a | 353 | svc->port); |
1da177e4 LT |
354 | list_add(&svc->s_list, &ip_vs_svc_table[hash]); |
355 | } else { | |
356 | /* | |
357 | * Hash it by fwmark in ip_vs_svc_fwm_table | |
358 | */ | |
359 | hash = ip_vs_svc_fwm_hashkey(svc->fwmark); | |
360 | list_add(&svc->f_list, &ip_vs_svc_fwm_table[hash]); | |
361 | } | |
362 | ||
363 | svc->flags |= IP_VS_SVC_F_HASHED; | |
364 | /* increase its refcnt because it is referenced by the svc table */ | |
365 | atomic_inc(&svc->refcnt); | |
366 | return 1; | |
367 | } | |
368 | ||
369 | ||
370 | /* | |
371 | * Unhashes a service from ip_vs_svc_table/ip_vs_svc_fwm_table. | |
372 | * Should be called with locked tables. | |
373 | */ | |
374 | static int ip_vs_svc_unhash(struct ip_vs_service *svc) | |
375 | { | |
376 | if (!(svc->flags & IP_VS_SVC_F_HASHED)) { | |
377 | IP_VS_ERR("ip_vs_svc_unhash(): request for unhash flagged, " | |
378 | "called from %p\n", __builtin_return_address(0)); | |
379 | return 0; | |
380 | } | |
381 | ||
382 | if (svc->fwmark == 0) { | |
383 | /* Remove it from the ip_vs_svc_table table */ | |
384 | list_del(&svc->s_list); | |
385 | } else { | |
386 | /* Remove it from the ip_vs_svc_fwm_table table */ | |
387 | list_del(&svc->f_list); | |
388 | } | |
389 | ||
390 | svc->flags &= ~IP_VS_SVC_F_HASHED; | |
391 | atomic_dec(&svc->refcnt); | |
392 | return 1; | |
393 | } | |
394 | ||
395 | ||
396 | /* | |
397 | * Get service by {proto,addr,port} in the service table. | |
398 | */ | |
b18610de JV |
399 | static inline struct ip_vs_service * |
400 | __ip_vs_service_get(int af, __u16 protocol, const union nf_inet_addr *vaddr, | |
401 | __be16 vport) | |
1da177e4 LT |
402 | { |
403 | unsigned hash; | |
404 | struct ip_vs_service *svc; | |
405 | ||
406 | /* Check for "full" addressed entries */ | |
b18610de | 407 | hash = ip_vs_svc_hashkey(af, protocol, vaddr, vport); |
1da177e4 LT |
408 | |
409 | list_for_each_entry(svc, &ip_vs_svc_table[hash], s_list){ | |
b18610de JV |
410 | if ((svc->af == af) |
411 | && ip_vs_addr_equal(af, &svc->addr, vaddr) | |
1da177e4 LT |
412 | && (svc->port == vport) |
413 | && (svc->protocol == protocol)) { | |
414 | /* HIT */ | |
415 | atomic_inc(&svc->usecnt); | |
416 | return svc; | |
417 | } | |
418 | } | |
419 | ||
420 | return NULL; | |
421 | } | |
422 | ||
423 | ||
424 | /* | |
425 | * Get service by {fwmark} in the service table. | |
426 | */ | |
b18610de JV |
427 | static inline struct ip_vs_service * |
428 | __ip_vs_svc_fwm_get(int af, __u32 fwmark) | |
1da177e4 LT |
429 | { |
430 | unsigned hash; | |
431 | struct ip_vs_service *svc; | |
432 | ||
433 | /* Check for fwmark addressed entries */ | |
434 | hash = ip_vs_svc_fwm_hashkey(fwmark); | |
435 | ||
436 | list_for_each_entry(svc, &ip_vs_svc_fwm_table[hash], f_list) { | |
b18610de | 437 | if (svc->fwmark == fwmark && svc->af == af) { |
1da177e4 LT |
438 | /* HIT */ |
439 | atomic_inc(&svc->usecnt); | |
440 | return svc; | |
441 | } | |
442 | } | |
443 | ||
444 | return NULL; | |
445 | } | |
446 | ||
447 | struct ip_vs_service * | |
3c2e0505 JV |
448 | ip_vs_service_get(int af, __u32 fwmark, __u16 protocol, |
449 | const union nf_inet_addr *vaddr, __be16 vport) | |
1da177e4 LT |
450 | { |
451 | struct ip_vs_service *svc; | |
3c2e0505 | 452 | |
1da177e4 LT |
453 | read_lock(&__ip_vs_svc_lock); |
454 | ||
455 | /* | |
456 | * Check the table hashed by fwmark first | |
457 | */ | |
3c2e0505 | 458 | if (fwmark && (svc = __ip_vs_svc_fwm_get(af, fwmark))) |
1da177e4 LT |
459 | goto out; |
460 | ||
461 | /* | |
462 | * Check the table hashed by <protocol,addr,port> | |
463 | * for "full" addressed entries | |
464 | */ | |
3c2e0505 | 465 | svc = __ip_vs_service_get(af, protocol, vaddr, vport); |
1da177e4 LT |
466 | |
467 | if (svc == NULL | |
468 | && protocol == IPPROTO_TCP | |
469 | && atomic_read(&ip_vs_ftpsvc_counter) | |
470 | && (vport == FTPDATA || ntohs(vport) >= PROT_SOCK)) { | |
471 | /* | |
472 | * Check if ftp service entry exists, the packet | |
473 | * might belong to FTP data connections. | |
474 | */ | |
3c2e0505 | 475 | svc = __ip_vs_service_get(af, protocol, vaddr, FTPPORT); |
1da177e4 LT |
476 | } |
477 | ||
478 | if (svc == NULL | |
479 | && atomic_read(&ip_vs_nullsvc_counter)) { | |
480 | /* | |
481 | * Check if the catch-all port (port zero) exists | |
482 | */ | |
3c2e0505 | 483 | svc = __ip_vs_service_get(af, protocol, vaddr, 0); |
1da177e4 LT |
484 | } |
485 | ||
486 | out: | |
487 | read_unlock(&__ip_vs_svc_lock); | |
488 | ||
3c2e0505 JV |
489 | IP_VS_DBG_BUF(9, "lookup service: fwm %u %s %s:%u %s\n", |
490 | fwmark, ip_vs_proto_name(protocol), | |
491 | IP_VS_DBG_ADDR(af, vaddr), ntohs(vport), | |
492 | svc ? "hit" : "not hit"); | |
1da177e4 LT |
493 | |
494 | return svc; | |
495 | } | |
496 | ||
497 | ||
498 | static inline void | |
499 | __ip_vs_bind_svc(struct ip_vs_dest *dest, struct ip_vs_service *svc) | |
500 | { | |
501 | atomic_inc(&svc->refcnt); | |
502 | dest->svc = svc; | |
503 | } | |
504 | ||
505 | static inline void | |
506 | __ip_vs_unbind_svc(struct ip_vs_dest *dest) | |
507 | { | |
508 | struct ip_vs_service *svc = dest->svc; | |
509 | ||
510 | dest->svc = NULL; | |
511 | if (atomic_dec_and_test(&svc->refcnt)) | |
512 | kfree(svc); | |
513 | } | |
514 | ||
515 | ||
516 | /* | |
517 | * Returns hash value for real service | |
518 | */ | |
7937df15 JV |
519 | static inline unsigned ip_vs_rs_hashkey(int af, |
520 | const union nf_inet_addr *addr, | |
521 | __be16 port) | |
1da177e4 LT |
522 | { |
523 | register unsigned porth = ntohs(port); | |
7937df15 JV |
524 | __be32 addr_fold = addr->ip; |
525 | ||
526 | #ifdef CONFIG_IP_VS_IPV6 | |
527 | if (af == AF_INET6) | |
528 | addr_fold = addr->ip6[0]^addr->ip6[1]^ | |
529 | addr->ip6[2]^addr->ip6[3]; | |
530 | #endif | |
1da177e4 | 531 | |
7937df15 | 532 | return (ntohl(addr_fold)^(porth>>IP_VS_RTAB_BITS)^porth) |
1da177e4 LT |
533 | & IP_VS_RTAB_MASK; |
534 | } | |
535 | ||
536 | /* | |
537 | * Hashes ip_vs_dest in ip_vs_rtable by <proto,addr,port>. | |
538 | * should be called with locked tables. | |
539 | */ | |
540 | static int ip_vs_rs_hash(struct ip_vs_dest *dest) | |
541 | { | |
542 | unsigned hash; | |
543 | ||
544 | if (!list_empty(&dest->d_list)) { | |
545 | return 0; | |
546 | } | |
547 | ||
548 | /* | |
549 | * Hash by proto,addr,port, | |
550 | * which are the parameters of the real service. | |
551 | */ | |
7937df15 JV |
552 | hash = ip_vs_rs_hashkey(dest->af, &dest->addr, dest->port); |
553 | ||
1da177e4 LT |
554 | list_add(&dest->d_list, &ip_vs_rtable[hash]); |
555 | ||
556 | return 1; | |
557 | } | |
558 | ||
559 | /* | |
560 | * UNhashes ip_vs_dest from ip_vs_rtable. | |
561 | * should be called with locked tables. | |
562 | */ | |
563 | static int ip_vs_rs_unhash(struct ip_vs_dest *dest) | |
564 | { | |
565 | /* | |
566 | * Remove it from the ip_vs_rtable table. | |
567 | */ | |
568 | if (!list_empty(&dest->d_list)) { | |
569 | list_del(&dest->d_list); | |
570 | INIT_LIST_HEAD(&dest->d_list); | |
571 | } | |
572 | ||
573 | return 1; | |
574 | } | |
575 | ||
576 | /* | |
577 | * Lookup real service by <proto,addr,port> in the real service table. | |
578 | */ | |
579 | struct ip_vs_dest * | |
7937df15 JV |
580 | ip_vs_lookup_real_service(int af, __u16 protocol, |
581 | const union nf_inet_addr *daddr, | |
582 | __be16 dport) | |
1da177e4 LT |
583 | { |
584 | unsigned hash; | |
585 | struct ip_vs_dest *dest; | |
586 | ||
587 | /* | |
588 | * Check for "full" addressed entries | |
589 | * Return the first found entry | |
590 | */ | |
7937df15 | 591 | hash = ip_vs_rs_hashkey(af, daddr, dport); |
1da177e4 LT |
592 | |
593 | read_lock(&__ip_vs_rs_lock); | |
594 | list_for_each_entry(dest, &ip_vs_rtable[hash], d_list) { | |
7937df15 JV |
595 | if ((dest->af == af) |
596 | && ip_vs_addr_equal(af, &dest->addr, daddr) | |
1da177e4 LT |
597 | && (dest->port == dport) |
598 | && ((dest->protocol == protocol) || | |
599 | dest->vfwmark)) { | |
600 | /* HIT */ | |
601 | read_unlock(&__ip_vs_rs_lock); | |
602 | return dest; | |
603 | } | |
604 | } | |
605 | read_unlock(&__ip_vs_rs_lock); | |
606 | ||
607 | return NULL; | |
608 | } | |
609 | ||
610 | /* | |
611 | * Lookup destination by {addr,port} in the given service | |
612 | */ | |
613 | static struct ip_vs_dest * | |
7937df15 JV |
614 | ip_vs_lookup_dest(struct ip_vs_service *svc, const union nf_inet_addr *daddr, |
615 | __be16 dport) | |
1da177e4 LT |
616 | { |
617 | struct ip_vs_dest *dest; | |
618 | ||
619 | /* | |
620 | * Find the destination for the given service | |
621 | */ | |
622 | list_for_each_entry(dest, &svc->destinations, n_list) { | |
7937df15 JV |
623 | if ((dest->af == svc->af) |
624 | && ip_vs_addr_equal(svc->af, &dest->addr, daddr) | |
625 | && (dest->port == dport)) { | |
1da177e4 LT |
626 | /* HIT */ |
627 | return dest; | |
628 | } | |
629 | } | |
630 | ||
631 | return NULL; | |
632 | } | |
633 | ||
1e356f9c RB |
634 | /* |
635 | * Find destination by {daddr,dport,vaddr,protocol} | |
636 | * Cretaed to be used in ip_vs_process_message() in | |
637 | * the backup synchronization daemon. It finds the | |
638 | * destination to be bound to the received connection | |
639 | * on the backup. | |
640 | * | |
641 | * ip_vs_lookup_real_service() looked promissing, but | |
642 | * seems not working as expected. | |
643 | */ | |
7937df15 JV |
644 | struct ip_vs_dest *ip_vs_find_dest(int af, const union nf_inet_addr *daddr, |
645 | __be16 dport, | |
646 | const union nf_inet_addr *vaddr, | |
647 | __be16 vport, __u16 protocol) | |
1e356f9c RB |
648 | { |
649 | struct ip_vs_dest *dest; | |
650 | struct ip_vs_service *svc; | |
651 | ||
7937df15 | 652 | svc = ip_vs_service_get(af, 0, protocol, vaddr, vport); |
1e356f9c RB |
653 | if (!svc) |
654 | return NULL; | |
655 | dest = ip_vs_lookup_dest(svc, daddr, dport); | |
656 | if (dest) | |
657 | atomic_inc(&dest->refcnt); | |
658 | ip_vs_service_put(svc); | |
659 | return dest; | |
660 | } | |
1da177e4 LT |
661 | |
662 | /* | |
663 | * Lookup dest by {svc,addr,port} in the destination trash. | |
664 | * The destination trash is used to hold the destinations that are removed | |
665 | * from the service table but are still referenced by some conn entries. | |
666 | * The reason to add the destination trash is when the dest is temporary | |
667 | * down (either by administrator or by monitor program), the dest can be | |
668 | * picked back from the trash, the remaining connections to the dest can | |
669 | * continue, and the counting information of the dest is also useful for | |
670 | * scheduling. | |
671 | */ | |
672 | static struct ip_vs_dest * | |
7937df15 JV |
673 | ip_vs_trash_get_dest(struct ip_vs_service *svc, const union nf_inet_addr *daddr, |
674 | __be16 dport) | |
1da177e4 LT |
675 | { |
676 | struct ip_vs_dest *dest, *nxt; | |
677 | ||
678 | /* | |
679 | * Find the destination in trash | |
680 | */ | |
681 | list_for_each_entry_safe(dest, nxt, &ip_vs_dest_trash, n_list) { | |
7937df15 JV |
682 | IP_VS_DBG_BUF(3, "Destination %u/%s:%u still in trash, " |
683 | "dest->refcnt=%d\n", | |
684 | dest->vfwmark, | |
685 | IP_VS_DBG_ADDR(svc->af, &dest->addr), | |
686 | ntohs(dest->port), | |
687 | atomic_read(&dest->refcnt)); | |
688 | if (dest->af == svc->af && | |
689 | ip_vs_addr_equal(svc->af, &dest->addr, daddr) && | |
1da177e4 LT |
690 | dest->port == dport && |
691 | dest->vfwmark == svc->fwmark && | |
692 | dest->protocol == svc->protocol && | |
693 | (svc->fwmark || | |
7937df15 | 694 | (ip_vs_addr_equal(svc->af, &dest->vaddr, &svc->addr) && |
1da177e4 LT |
695 | dest->vport == svc->port))) { |
696 | /* HIT */ | |
697 | return dest; | |
698 | } | |
699 | ||
700 | /* | |
701 | * Try to purge the destination from trash if not referenced | |
702 | */ | |
703 | if (atomic_read(&dest->refcnt) == 1) { | |
7937df15 JV |
704 | IP_VS_DBG_BUF(3, "Removing destination %u/%s:%u " |
705 | "from trash\n", | |
706 | dest->vfwmark, | |
707 | IP_VS_DBG_ADDR(svc->af, &dest->addr), | |
708 | ntohs(dest->port)); | |
1da177e4 LT |
709 | list_del(&dest->n_list); |
710 | ip_vs_dst_reset(dest); | |
711 | __ip_vs_unbind_svc(dest); | |
712 | kfree(dest); | |
713 | } | |
714 | } | |
715 | ||
716 | return NULL; | |
717 | } | |
718 | ||
719 | ||
720 | /* | |
721 | * Clean up all the destinations in the trash | |
722 | * Called by the ip_vs_control_cleanup() | |
723 | * | |
724 | * When the ip_vs_control_clearup is activated by ipvs module exit, | |
725 | * the service tables must have been flushed and all the connections | |
726 | * are expired, and the refcnt of each destination in the trash must | |
727 | * be 1, so we simply release them here. | |
728 | */ | |
729 | static void ip_vs_trash_cleanup(void) | |
730 | { | |
731 | struct ip_vs_dest *dest, *nxt; | |
732 | ||
733 | list_for_each_entry_safe(dest, nxt, &ip_vs_dest_trash, n_list) { | |
734 | list_del(&dest->n_list); | |
735 | ip_vs_dst_reset(dest); | |
736 | __ip_vs_unbind_svc(dest); | |
737 | kfree(dest); | |
738 | } | |
739 | } | |
740 | ||
741 | ||
742 | static void | |
743 | ip_vs_zero_stats(struct ip_vs_stats *stats) | |
744 | { | |
745 | spin_lock_bh(&stats->lock); | |
e93615d0 SH |
746 | |
747 | stats->conns = 0; | |
748 | stats->inpkts = 0; | |
749 | stats->outpkts = 0; | |
750 | stats->inbytes = 0; | |
751 | stats->outbytes = 0; | |
752 | ||
753 | stats->cps = 0; | |
754 | stats->inpps = 0; | |
755 | stats->outpps = 0; | |
756 | stats->inbps = 0; | |
757 | stats->outbps = 0; | |
758 | ||
1da177e4 | 759 | ip_vs_zero_estimator(stats); |
e93615d0 | 760 | |
3a14a313 | 761 | spin_unlock_bh(&stats->lock); |
1da177e4 LT |
762 | } |
763 | ||
764 | /* | |
765 | * Update a destination in the given service | |
766 | */ | |
767 | static void | |
768 | __ip_vs_update_dest(struct ip_vs_service *svc, | |
c860c6b1 | 769 | struct ip_vs_dest *dest, struct ip_vs_dest_user_kern *udest) |
1da177e4 LT |
770 | { |
771 | int conn_flags; | |
772 | ||
773 | /* set the weight and the flags */ | |
774 | atomic_set(&dest->weight, udest->weight); | |
775 | conn_flags = udest->conn_flags | IP_VS_CONN_F_INACTIVE; | |
776 | ||
777 | /* check if local node and update the flags */ | |
09571c7a VB |
778 | #ifdef CONFIG_IP_VS_IPV6 |
779 | if (svc->af == AF_INET6) { | |
780 | if (__ip_vs_addr_is_local_v6(&udest->addr.in6)) { | |
781 | conn_flags = (conn_flags & ~IP_VS_CONN_F_FWD_MASK) | |
782 | | IP_VS_CONN_F_LOCALNODE; | |
783 | } | |
784 | } else | |
785 | #endif | |
786 | if (inet_addr_type(&init_net, udest->addr.ip) == RTN_LOCAL) { | |
787 | conn_flags = (conn_flags & ~IP_VS_CONN_F_FWD_MASK) | |
788 | | IP_VS_CONN_F_LOCALNODE; | |
789 | } | |
1da177e4 LT |
790 | |
791 | /* set the IP_VS_CONN_F_NOOUTPUT flag if not masquerading/NAT */ | |
792 | if ((conn_flags & IP_VS_CONN_F_FWD_MASK) != 0) { | |
793 | conn_flags |= IP_VS_CONN_F_NOOUTPUT; | |
794 | } else { | |
795 | /* | |
796 | * Put the real service in ip_vs_rtable if not present. | |
797 | * For now only for NAT! | |
798 | */ | |
799 | write_lock_bh(&__ip_vs_rs_lock); | |
800 | ip_vs_rs_hash(dest); | |
801 | write_unlock_bh(&__ip_vs_rs_lock); | |
802 | } | |
803 | atomic_set(&dest->conn_flags, conn_flags); | |
804 | ||
805 | /* bind the service */ | |
806 | if (!dest->svc) { | |
807 | __ip_vs_bind_svc(dest, svc); | |
808 | } else { | |
809 | if (dest->svc != svc) { | |
810 | __ip_vs_unbind_svc(dest); | |
811 | ip_vs_zero_stats(&dest->stats); | |
812 | __ip_vs_bind_svc(dest, svc); | |
813 | } | |
814 | } | |
815 | ||
816 | /* set the dest status flags */ | |
817 | dest->flags |= IP_VS_DEST_F_AVAILABLE; | |
818 | ||
819 | if (udest->u_threshold == 0 || udest->u_threshold > dest->u_threshold) | |
820 | dest->flags &= ~IP_VS_DEST_F_OVERLOAD; | |
821 | dest->u_threshold = udest->u_threshold; | |
822 | dest->l_threshold = udest->l_threshold; | |
823 | } | |
824 | ||
825 | ||
826 | /* | |
827 | * Create a destination for the given service | |
828 | */ | |
829 | static int | |
c860c6b1 | 830 | ip_vs_new_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest, |
1da177e4 LT |
831 | struct ip_vs_dest **dest_p) |
832 | { | |
833 | struct ip_vs_dest *dest; | |
834 | unsigned atype; | |
835 | ||
836 | EnterFunction(2); | |
837 | ||
09571c7a VB |
838 | #ifdef CONFIG_IP_VS_IPV6 |
839 | if (svc->af == AF_INET6) { | |
840 | atype = ipv6_addr_type(&udest->addr.in6); | |
841 | if (!(atype & IPV6_ADDR_UNICAST) && | |
842 | !__ip_vs_addr_is_local_v6(&udest->addr.in6)) | |
843 | return -EINVAL; | |
844 | } else | |
845 | #endif | |
846 | { | |
847 | atype = inet_addr_type(&init_net, udest->addr.ip); | |
848 | if (atype != RTN_LOCAL && atype != RTN_UNICAST) | |
849 | return -EINVAL; | |
850 | } | |
1da177e4 | 851 | |
0da974f4 | 852 | dest = kzalloc(sizeof(struct ip_vs_dest), GFP_ATOMIC); |
1da177e4 LT |
853 | if (dest == NULL) { |
854 | IP_VS_ERR("ip_vs_new_dest: kmalloc failed.\n"); | |
855 | return -ENOMEM; | |
856 | } | |
1da177e4 | 857 | |
c860c6b1 | 858 | dest->af = svc->af; |
1da177e4 | 859 | dest->protocol = svc->protocol; |
c860c6b1 | 860 | dest->vaddr = svc->addr; |
1da177e4 LT |
861 | dest->vport = svc->port; |
862 | dest->vfwmark = svc->fwmark; | |
c860c6b1 | 863 | ip_vs_addr_copy(svc->af, &dest->addr, &udest->addr); |
1da177e4 LT |
864 | dest->port = udest->port; |
865 | ||
866 | atomic_set(&dest->activeconns, 0); | |
867 | atomic_set(&dest->inactconns, 0); | |
868 | atomic_set(&dest->persistconns, 0); | |
869 | atomic_set(&dest->refcnt, 0); | |
870 | ||
871 | INIT_LIST_HEAD(&dest->d_list); | |
872 | spin_lock_init(&dest->dst_lock); | |
873 | spin_lock_init(&dest->stats.lock); | |
874 | __ip_vs_update_dest(svc, dest, udest); | |
875 | ip_vs_new_estimator(&dest->stats); | |
876 | ||
877 | *dest_p = dest; | |
878 | ||
879 | LeaveFunction(2); | |
880 | return 0; | |
881 | } | |
882 | ||
883 | ||
884 | /* | |
885 | * Add a destination into an existing service | |
886 | */ | |
887 | static int | |
c860c6b1 | 888 | ip_vs_add_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest) |
1da177e4 LT |
889 | { |
890 | struct ip_vs_dest *dest; | |
c860c6b1 | 891 | union nf_inet_addr daddr; |
014d730d | 892 | __be16 dport = udest->port; |
1da177e4 LT |
893 | int ret; |
894 | ||
895 | EnterFunction(2); | |
896 | ||
897 | if (udest->weight < 0) { | |
898 | IP_VS_ERR("ip_vs_add_dest(): server weight less than zero\n"); | |
899 | return -ERANGE; | |
900 | } | |
901 | ||
902 | if (udest->l_threshold > udest->u_threshold) { | |
903 | IP_VS_ERR("ip_vs_add_dest(): lower threshold is higher than " | |
904 | "upper threshold\n"); | |
905 | return -ERANGE; | |
906 | } | |
907 | ||
c860c6b1 JV |
908 | ip_vs_addr_copy(svc->af, &daddr, &udest->addr); |
909 | ||
1da177e4 LT |
910 | /* |
911 | * Check if the dest already exists in the list | |
912 | */ | |
7937df15 JV |
913 | dest = ip_vs_lookup_dest(svc, &daddr, dport); |
914 | ||
1da177e4 LT |
915 | if (dest != NULL) { |
916 | IP_VS_DBG(1, "ip_vs_add_dest(): dest already exists\n"); | |
917 | return -EEXIST; | |
918 | } | |
919 | ||
920 | /* | |
921 | * Check if the dest already exists in the trash and | |
922 | * is from the same service | |
923 | */ | |
7937df15 JV |
924 | dest = ip_vs_trash_get_dest(svc, &daddr, dport); |
925 | ||
1da177e4 | 926 | if (dest != NULL) { |
cfc78c5a JV |
927 | IP_VS_DBG_BUF(3, "Get destination %s:%u from trash, " |
928 | "dest->refcnt=%d, service %u/%s:%u\n", | |
929 | IP_VS_DBG_ADDR(svc->af, &daddr), ntohs(dport), | |
930 | atomic_read(&dest->refcnt), | |
931 | dest->vfwmark, | |
932 | IP_VS_DBG_ADDR(svc->af, &dest->vaddr), | |
933 | ntohs(dest->vport)); | |
934 | ||
1da177e4 LT |
935 | __ip_vs_update_dest(svc, dest, udest); |
936 | ||
937 | /* | |
938 | * Get the destination from the trash | |
939 | */ | |
940 | list_del(&dest->n_list); | |
941 | ||
942 | ip_vs_new_estimator(&dest->stats); | |
943 | ||
944 | write_lock_bh(&__ip_vs_svc_lock); | |
945 | ||
946 | /* | |
947 | * Wait until all other svc users go away. | |
948 | */ | |
949 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1); | |
950 | ||
951 | list_add(&dest->n_list, &svc->destinations); | |
952 | svc->num_dests++; | |
953 | ||
954 | /* call the update_service function of its scheduler */ | |
82dfb6f3 SW |
955 | if (svc->scheduler->update_service) |
956 | svc->scheduler->update_service(svc); | |
1da177e4 LT |
957 | |
958 | write_unlock_bh(&__ip_vs_svc_lock); | |
959 | return 0; | |
960 | } | |
961 | ||
962 | /* | |
963 | * Allocate and initialize the dest structure | |
964 | */ | |
965 | ret = ip_vs_new_dest(svc, udest, &dest); | |
966 | if (ret) { | |
967 | return ret; | |
968 | } | |
969 | ||
970 | /* | |
971 | * Add the dest entry into the list | |
972 | */ | |
973 | atomic_inc(&dest->refcnt); | |
974 | ||
975 | write_lock_bh(&__ip_vs_svc_lock); | |
976 | ||
977 | /* | |
978 | * Wait until all other svc users go away. | |
979 | */ | |
980 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1); | |
981 | ||
982 | list_add(&dest->n_list, &svc->destinations); | |
983 | svc->num_dests++; | |
984 | ||
985 | /* call the update_service function of its scheduler */ | |
82dfb6f3 SW |
986 | if (svc->scheduler->update_service) |
987 | svc->scheduler->update_service(svc); | |
1da177e4 LT |
988 | |
989 | write_unlock_bh(&__ip_vs_svc_lock); | |
990 | ||
991 | LeaveFunction(2); | |
992 | ||
993 | return 0; | |
994 | } | |
995 | ||
996 | ||
997 | /* | |
998 | * Edit a destination in the given service | |
999 | */ | |
1000 | static int | |
c860c6b1 | 1001 | ip_vs_edit_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest) |
1da177e4 LT |
1002 | { |
1003 | struct ip_vs_dest *dest; | |
c860c6b1 | 1004 | union nf_inet_addr daddr; |
014d730d | 1005 | __be16 dport = udest->port; |
1da177e4 LT |
1006 | |
1007 | EnterFunction(2); | |
1008 | ||
1009 | if (udest->weight < 0) { | |
1010 | IP_VS_ERR("ip_vs_edit_dest(): server weight less than zero\n"); | |
1011 | return -ERANGE; | |
1012 | } | |
1013 | ||
1014 | if (udest->l_threshold > udest->u_threshold) { | |
1015 | IP_VS_ERR("ip_vs_edit_dest(): lower threshold is higher than " | |
1016 | "upper threshold\n"); | |
1017 | return -ERANGE; | |
1018 | } | |
1019 | ||
c860c6b1 JV |
1020 | ip_vs_addr_copy(svc->af, &daddr, &udest->addr); |
1021 | ||
1da177e4 LT |
1022 | /* |
1023 | * Lookup the destination list | |
1024 | */ | |
7937df15 JV |
1025 | dest = ip_vs_lookup_dest(svc, &daddr, dport); |
1026 | ||
1da177e4 LT |
1027 | if (dest == NULL) { |
1028 | IP_VS_DBG(1, "ip_vs_edit_dest(): dest doesn't exist\n"); | |
1029 | return -ENOENT; | |
1030 | } | |
1031 | ||
1032 | __ip_vs_update_dest(svc, dest, udest); | |
1033 | ||
1034 | write_lock_bh(&__ip_vs_svc_lock); | |
1035 | ||
1036 | /* Wait until all other svc users go away */ | |
cae7ca3d | 1037 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1); |
1da177e4 LT |
1038 | |
1039 | /* call the update_service, because server weight may be changed */ | |
82dfb6f3 SW |
1040 | if (svc->scheduler->update_service) |
1041 | svc->scheduler->update_service(svc); | |
1da177e4 LT |
1042 | |
1043 | write_unlock_bh(&__ip_vs_svc_lock); | |
1044 | ||
1045 | LeaveFunction(2); | |
1046 | ||
1047 | return 0; | |
1048 | } | |
1049 | ||
1050 | ||
1051 | /* | |
1052 | * Delete a destination (must be already unlinked from the service) | |
1053 | */ | |
1054 | static void __ip_vs_del_dest(struct ip_vs_dest *dest) | |
1055 | { | |
1056 | ip_vs_kill_estimator(&dest->stats); | |
1057 | ||
1058 | /* | |
1059 | * Remove it from the d-linked list with the real services. | |
1060 | */ | |
1061 | write_lock_bh(&__ip_vs_rs_lock); | |
1062 | ip_vs_rs_unhash(dest); | |
1063 | write_unlock_bh(&__ip_vs_rs_lock); | |
1064 | ||
1065 | /* | |
1066 | * Decrease the refcnt of the dest, and free the dest | |
1067 | * if nobody refers to it (refcnt=0). Otherwise, throw | |
1068 | * the destination into the trash. | |
1069 | */ | |
1070 | if (atomic_dec_and_test(&dest->refcnt)) { | |
1071 | ip_vs_dst_reset(dest); | |
1072 | /* simply decrease svc->refcnt here, let the caller check | |
1073 | and release the service if nobody refers to it. | |
1074 | Only user context can release destination and service, | |
1075 | and only one user context can update virtual service at a | |
1076 | time, so the operation here is OK */ | |
1077 | atomic_dec(&dest->svc->refcnt); | |
1078 | kfree(dest); | |
1079 | } else { | |
cfc78c5a JV |
1080 | IP_VS_DBG_BUF(3, "Moving dest %s:%u into trash, " |
1081 | "dest->refcnt=%d\n", | |
1082 | IP_VS_DBG_ADDR(dest->af, &dest->addr), | |
1083 | ntohs(dest->port), | |
1084 | atomic_read(&dest->refcnt)); | |
1da177e4 LT |
1085 | list_add(&dest->n_list, &ip_vs_dest_trash); |
1086 | atomic_inc(&dest->refcnt); | |
1087 | } | |
1088 | } | |
1089 | ||
1090 | ||
1091 | /* | |
1092 | * Unlink a destination from the given service | |
1093 | */ | |
1094 | static void __ip_vs_unlink_dest(struct ip_vs_service *svc, | |
1095 | struct ip_vs_dest *dest, | |
1096 | int svcupd) | |
1097 | { | |
1098 | dest->flags &= ~IP_VS_DEST_F_AVAILABLE; | |
1099 | ||
1100 | /* | |
1101 | * Remove it from the d-linked destination list. | |
1102 | */ | |
1103 | list_del(&dest->n_list); | |
1104 | svc->num_dests--; | |
82dfb6f3 SW |
1105 | |
1106 | /* | |
1107 | * Call the update_service function of its scheduler | |
1108 | */ | |
1109 | if (svcupd && svc->scheduler->update_service) | |
1110 | svc->scheduler->update_service(svc); | |
1da177e4 LT |
1111 | } |
1112 | ||
1113 | ||
1114 | /* | |
1115 | * Delete a destination server in the given service | |
1116 | */ | |
1117 | static int | |
c860c6b1 | 1118 | ip_vs_del_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest) |
1da177e4 LT |
1119 | { |
1120 | struct ip_vs_dest *dest; | |
014d730d | 1121 | __be16 dport = udest->port; |
1da177e4 LT |
1122 | |
1123 | EnterFunction(2); | |
1124 | ||
7937df15 | 1125 | dest = ip_vs_lookup_dest(svc, &udest->addr, dport); |
c860c6b1 | 1126 | |
1da177e4 LT |
1127 | if (dest == NULL) { |
1128 | IP_VS_DBG(1, "ip_vs_del_dest(): destination not found!\n"); | |
1129 | return -ENOENT; | |
1130 | } | |
1131 | ||
1132 | write_lock_bh(&__ip_vs_svc_lock); | |
1133 | ||
1134 | /* | |
1135 | * Wait until all other svc users go away. | |
1136 | */ | |
1137 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1); | |
1138 | ||
1139 | /* | |
1140 | * Unlink dest from the service | |
1141 | */ | |
1142 | __ip_vs_unlink_dest(svc, dest, 1); | |
1143 | ||
1144 | write_unlock_bh(&__ip_vs_svc_lock); | |
1145 | ||
1146 | /* | |
1147 | * Delete the destination | |
1148 | */ | |
1149 | __ip_vs_del_dest(dest); | |
1150 | ||
1151 | LeaveFunction(2); | |
1152 | ||
1153 | return 0; | |
1154 | } | |
1155 | ||
1156 | ||
1157 | /* | |
1158 | * Add a service into the service hash table | |
1159 | */ | |
1160 | static int | |
c860c6b1 JV |
1161 | ip_vs_add_service(struct ip_vs_service_user_kern *u, |
1162 | struct ip_vs_service **svc_p) | |
1da177e4 LT |
1163 | { |
1164 | int ret = 0; | |
1165 | struct ip_vs_scheduler *sched = NULL; | |
1166 | struct ip_vs_service *svc = NULL; | |
1167 | ||
1168 | /* increase the module use count */ | |
1169 | ip_vs_use_count_inc(); | |
1170 | ||
1171 | /* Lookup the scheduler by 'u->sched_name' */ | |
1172 | sched = ip_vs_scheduler_get(u->sched_name); | |
1173 | if (sched == NULL) { | |
1174 | IP_VS_INFO("Scheduler module ip_vs_%s not found\n", | |
1175 | u->sched_name); | |
1176 | ret = -ENOENT; | |
1177 | goto out_mod_dec; | |
1178 | } | |
1179 | ||
0da974f4 | 1180 | svc = kzalloc(sizeof(struct ip_vs_service), GFP_ATOMIC); |
1da177e4 LT |
1181 | if (svc == NULL) { |
1182 | IP_VS_DBG(1, "ip_vs_add_service: kmalloc failed.\n"); | |
1183 | ret = -ENOMEM; | |
1184 | goto out_err; | |
1185 | } | |
1da177e4 LT |
1186 | |
1187 | /* I'm the first user of the service */ | |
1188 | atomic_set(&svc->usecnt, 1); | |
1189 | atomic_set(&svc->refcnt, 0); | |
1190 | ||
c860c6b1 | 1191 | svc->af = u->af; |
1da177e4 | 1192 | svc->protocol = u->protocol; |
c860c6b1 | 1193 | ip_vs_addr_copy(svc->af, &svc->addr, &u->addr); |
1da177e4 LT |
1194 | svc->port = u->port; |
1195 | svc->fwmark = u->fwmark; | |
1196 | svc->flags = u->flags; | |
1197 | svc->timeout = u->timeout * HZ; | |
1198 | svc->netmask = u->netmask; | |
1199 | ||
1200 | INIT_LIST_HEAD(&svc->destinations); | |
1201 | rwlock_init(&svc->sched_lock); | |
1202 | spin_lock_init(&svc->stats.lock); | |
1203 | ||
1204 | /* Bind the scheduler */ | |
1205 | ret = ip_vs_bind_scheduler(svc, sched); | |
1206 | if (ret) | |
1207 | goto out_err; | |
1208 | sched = NULL; | |
1209 | ||
1210 | /* Update the virtual service counters */ | |
1211 | if (svc->port == FTPPORT) | |
1212 | atomic_inc(&ip_vs_ftpsvc_counter); | |
1213 | else if (svc->port == 0) | |
1214 | atomic_inc(&ip_vs_nullsvc_counter); | |
1215 | ||
1216 | ip_vs_new_estimator(&svc->stats); | |
1217 | ip_vs_num_services++; | |
1218 | ||
1219 | /* Hash the service into the service table */ | |
1220 | write_lock_bh(&__ip_vs_svc_lock); | |
1221 | ip_vs_svc_hash(svc); | |
1222 | write_unlock_bh(&__ip_vs_svc_lock); | |
1223 | ||
1224 | *svc_p = svc; | |
1225 | return 0; | |
1226 | ||
1227 | out_err: | |
1228 | if (svc != NULL) { | |
1229 | if (svc->scheduler) | |
1230 | ip_vs_unbind_scheduler(svc); | |
1231 | if (svc->inc) { | |
1232 | local_bh_disable(); | |
1233 | ip_vs_app_inc_put(svc->inc); | |
1234 | local_bh_enable(); | |
1235 | } | |
1236 | kfree(svc); | |
1237 | } | |
1238 | ip_vs_scheduler_put(sched); | |
1239 | ||
1240 | out_mod_dec: | |
1241 | /* decrease the module use count */ | |
1242 | ip_vs_use_count_dec(); | |
1243 | ||
1244 | return ret; | |
1245 | } | |
1246 | ||
1247 | ||
1248 | /* | |
1249 | * Edit a service and bind it with a new scheduler | |
1250 | */ | |
1251 | static int | |
c860c6b1 | 1252 | ip_vs_edit_service(struct ip_vs_service *svc, struct ip_vs_service_user_kern *u) |
1da177e4 LT |
1253 | { |
1254 | struct ip_vs_scheduler *sched, *old_sched; | |
1255 | int ret = 0; | |
1256 | ||
1257 | /* | |
1258 | * Lookup the scheduler, by 'u->sched_name' | |
1259 | */ | |
1260 | sched = ip_vs_scheduler_get(u->sched_name); | |
1261 | if (sched == NULL) { | |
1262 | IP_VS_INFO("Scheduler module ip_vs_%s not found\n", | |
1263 | u->sched_name); | |
1264 | return -ENOENT; | |
1265 | } | |
1266 | old_sched = sched; | |
1267 | ||
1268 | write_lock_bh(&__ip_vs_svc_lock); | |
1269 | ||
1270 | /* | |
1271 | * Wait until all other svc users go away. | |
1272 | */ | |
1273 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1); | |
1274 | ||
1275 | /* | |
1276 | * Set the flags and timeout value | |
1277 | */ | |
1278 | svc->flags = u->flags | IP_VS_SVC_F_HASHED; | |
1279 | svc->timeout = u->timeout * HZ; | |
1280 | svc->netmask = u->netmask; | |
1281 | ||
1282 | old_sched = svc->scheduler; | |
1283 | if (sched != old_sched) { | |
1284 | /* | |
1285 | * Unbind the old scheduler | |
1286 | */ | |
1287 | if ((ret = ip_vs_unbind_scheduler(svc))) { | |
1288 | old_sched = sched; | |
1289 | goto out; | |
1290 | } | |
1291 | ||
1292 | /* | |
1293 | * Bind the new scheduler | |
1294 | */ | |
1295 | if ((ret = ip_vs_bind_scheduler(svc, sched))) { | |
1296 | /* | |
1297 | * If ip_vs_bind_scheduler fails, restore the old | |
1298 | * scheduler. | |
1299 | * The main reason of failure is out of memory. | |
1300 | * | |
1301 | * The question is if the old scheduler can be | |
1302 | * restored all the time. TODO: if it cannot be | |
1303 | * restored some time, we must delete the service, | |
1304 | * otherwise the system may crash. | |
1305 | */ | |
1306 | ip_vs_bind_scheduler(svc, old_sched); | |
1307 | old_sched = sched; | |
1308 | goto out; | |
1309 | } | |
1310 | } | |
1311 | ||
1312 | out: | |
1313 | write_unlock_bh(&__ip_vs_svc_lock); | |
1314 | ||
1315 | if (old_sched) | |
1316 | ip_vs_scheduler_put(old_sched); | |
1317 | ||
1318 | return ret; | |
1319 | } | |
1320 | ||
1321 | ||
1322 | /* | |
1323 | * Delete a service from the service list | |
1324 | * - The service must be unlinked, unlocked and not referenced! | |
1325 | * - We are called under _bh lock | |
1326 | */ | |
1327 | static void __ip_vs_del_service(struct ip_vs_service *svc) | |
1328 | { | |
1329 | struct ip_vs_dest *dest, *nxt; | |
1330 | struct ip_vs_scheduler *old_sched; | |
1331 | ||
1332 | ip_vs_num_services--; | |
1333 | ip_vs_kill_estimator(&svc->stats); | |
1334 | ||
1335 | /* Unbind scheduler */ | |
1336 | old_sched = svc->scheduler; | |
1337 | ip_vs_unbind_scheduler(svc); | |
1338 | if (old_sched) | |
1339 | ip_vs_scheduler_put(old_sched); | |
1340 | ||
1341 | /* Unbind app inc */ | |
1342 | if (svc->inc) { | |
1343 | ip_vs_app_inc_put(svc->inc); | |
1344 | svc->inc = NULL; | |
1345 | } | |
1346 | ||
1347 | /* | |
1348 | * Unlink the whole destination list | |
1349 | */ | |
1350 | list_for_each_entry_safe(dest, nxt, &svc->destinations, n_list) { | |
1351 | __ip_vs_unlink_dest(svc, dest, 0); | |
1352 | __ip_vs_del_dest(dest); | |
1353 | } | |
1354 | ||
1355 | /* | |
1356 | * Update the virtual service counters | |
1357 | */ | |
1358 | if (svc->port == FTPPORT) | |
1359 | atomic_dec(&ip_vs_ftpsvc_counter); | |
1360 | else if (svc->port == 0) | |
1361 | atomic_dec(&ip_vs_nullsvc_counter); | |
1362 | ||
1363 | /* | |
1364 | * Free the service if nobody refers to it | |
1365 | */ | |
1366 | if (atomic_read(&svc->refcnt) == 0) | |
1367 | kfree(svc); | |
1368 | ||
1369 | /* decrease the module use count */ | |
1370 | ip_vs_use_count_dec(); | |
1371 | } | |
1372 | ||
1373 | /* | |
1374 | * Delete a service from the service list | |
1375 | */ | |
1376 | static int ip_vs_del_service(struct ip_vs_service *svc) | |
1377 | { | |
1378 | if (svc == NULL) | |
1379 | return -EEXIST; | |
1380 | ||
1381 | /* | |
1382 | * Unhash it from the service table | |
1383 | */ | |
1384 | write_lock_bh(&__ip_vs_svc_lock); | |
1385 | ||
1386 | ip_vs_svc_unhash(svc); | |
1387 | ||
1388 | /* | |
1389 | * Wait until all the svc users go away. | |
1390 | */ | |
1391 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1); | |
1392 | ||
1393 | __ip_vs_del_service(svc); | |
1394 | ||
1395 | write_unlock_bh(&__ip_vs_svc_lock); | |
1396 | ||
1397 | return 0; | |
1398 | } | |
1399 | ||
1400 | ||
1401 | /* | |
1402 | * Flush all the virtual services | |
1403 | */ | |
1404 | static int ip_vs_flush(void) | |
1405 | { | |
1406 | int idx; | |
1407 | struct ip_vs_service *svc, *nxt; | |
1408 | ||
1409 | /* | |
1410 | * Flush the service table hashed by <protocol,addr,port> | |
1411 | */ | |
1412 | for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
1413 | list_for_each_entry_safe(svc, nxt, &ip_vs_svc_table[idx], s_list) { | |
1414 | write_lock_bh(&__ip_vs_svc_lock); | |
1415 | ip_vs_svc_unhash(svc); | |
1416 | /* | |
1417 | * Wait until all the svc users go away. | |
1418 | */ | |
1419 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 0); | |
1420 | __ip_vs_del_service(svc); | |
1421 | write_unlock_bh(&__ip_vs_svc_lock); | |
1422 | } | |
1423 | } | |
1424 | ||
1425 | /* | |
1426 | * Flush the service table hashed by fwmark | |
1427 | */ | |
1428 | for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
1429 | list_for_each_entry_safe(svc, nxt, | |
1430 | &ip_vs_svc_fwm_table[idx], f_list) { | |
1431 | write_lock_bh(&__ip_vs_svc_lock); | |
1432 | ip_vs_svc_unhash(svc); | |
1433 | /* | |
1434 | * Wait until all the svc users go away. | |
1435 | */ | |
1436 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 0); | |
1437 | __ip_vs_del_service(svc); | |
1438 | write_unlock_bh(&__ip_vs_svc_lock); | |
1439 | } | |
1440 | } | |
1441 | ||
1442 | return 0; | |
1443 | } | |
1444 | ||
1445 | ||
1446 | /* | |
1447 | * Zero counters in a service or all services | |
1448 | */ | |
1449 | static int ip_vs_zero_service(struct ip_vs_service *svc) | |
1450 | { | |
1451 | struct ip_vs_dest *dest; | |
1452 | ||
1453 | write_lock_bh(&__ip_vs_svc_lock); | |
1454 | list_for_each_entry(dest, &svc->destinations, n_list) { | |
1455 | ip_vs_zero_stats(&dest->stats); | |
1456 | } | |
1457 | ip_vs_zero_stats(&svc->stats); | |
1458 | write_unlock_bh(&__ip_vs_svc_lock); | |
1459 | return 0; | |
1460 | } | |
1461 | ||
1462 | static int ip_vs_zero_all(void) | |
1463 | { | |
1464 | int idx; | |
1465 | struct ip_vs_service *svc; | |
1466 | ||
1467 | for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
1468 | list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) { | |
1469 | ip_vs_zero_service(svc); | |
1470 | } | |
1471 | } | |
1472 | ||
1473 | for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
1474 | list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) { | |
1475 | ip_vs_zero_service(svc); | |
1476 | } | |
1477 | } | |
1478 | ||
1479 | ip_vs_zero_stats(&ip_vs_stats); | |
1480 | return 0; | |
1481 | } | |
1482 | ||
1483 | ||
1484 | static int | |
1485 | proc_do_defense_mode(ctl_table *table, int write, struct file * filp, | |
1486 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
1487 | { | |
1488 | int *valp = table->data; | |
1489 | int val = *valp; | |
1490 | int rc; | |
1491 | ||
1492 | rc = proc_dointvec(table, write, filp, buffer, lenp, ppos); | |
1493 | if (write && (*valp != val)) { | |
1494 | if ((*valp < 0) || (*valp > 3)) { | |
1495 | /* Restore the correct value */ | |
1496 | *valp = val; | |
1497 | } else { | |
1da177e4 | 1498 | update_defense_level(); |
1da177e4 LT |
1499 | } |
1500 | } | |
1501 | return rc; | |
1502 | } | |
1503 | ||
1504 | ||
1505 | static int | |
1506 | proc_do_sync_threshold(ctl_table *table, int write, struct file *filp, | |
1507 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
1508 | { | |
1509 | int *valp = table->data; | |
1510 | int val[2]; | |
1511 | int rc; | |
1512 | ||
1513 | /* backup the value first */ | |
1514 | memcpy(val, valp, sizeof(val)); | |
1515 | ||
1516 | rc = proc_dointvec(table, write, filp, buffer, lenp, ppos); | |
1517 | if (write && (valp[0] < 0 || valp[1] < 0 || valp[0] >= valp[1])) { | |
1518 | /* Restore the correct value */ | |
1519 | memcpy(valp, val, sizeof(val)); | |
1520 | } | |
1521 | return rc; | |
1522 | } | |
1523 | ||
1524 | ||
1525 | /* | |
1526 | * IPVS sysctl table (under the /proc/sys/net/ipv4/vs/) | |
1527 | */ | |
1528 | ||
1529 | static struct ctl_table vs_vars[] = { | |
1530 | { | |
1da177e4 LT |
1531 | .procname = "amemthresh", |
1532 | .data = &sysctl_ip_vs_amemthresh, | |
1533 | .maxlen = sizeof(int), | |
1534 | .mode = 0644, | |
1535 | .proc_handler = &proc_dointvec, | |
1536 | }, | |
1537 | #ifdef CONFIG_IP_VS_DEBUG | |
1538 | { | |
1da177e4 LT |
1539 | .procname = "debug_level", |
1540 | .data = &sysctl_ip_vs_debug_level, | |
1541 | .maxlen = sizeof(int), | |
1542 | .mode = 0644, | |
1543 | .proc_handler = &proc_dointvec, | |
1544 | }, | |
1545 | #endif | |
1546 | { | |
1da177e4 LT |
1547 | .procname = "am_droprate", |
1548 | .data = &sysctl_ip_vs_am_droprate, | |
1549 | .maxlen = sizeof(int), | |
1550 | .mode = 0644, | |
1551 | .proc_handler = &proc_dointvec, | |
1552 | }, | |
1553 | { | |
1da177e4 LT |
1554 | .procname = "drop_entry", |
1555 | .data = &sysctl_ip_vs_drop_entry, | |
1556 | .maxlen = sizeof(int), | |
1557 | .mode = 0644, | |
1558 | .proc_handler = &proc_do_defense_mode, | |
1559 | }, | |
1560 | { | |
1da177e4 LT |
1561 | .procname = "drop_packet", |
1562 | .data = &sysctl_ip_vs_drop_packet, | |
1563 | .maxlen = sizeof(int), | |
1564 | .mode = 0644, | |
1565 | .proc_handler = &proc_do_defense_mode, | |
1566 | }, | |
1567 | { | |
1da177e4 LT |
1568 | .procname = "secure_tcp", |
1569 | .data = &sysctl_ip_vs_secure_tcp, | |
1570 | .maxlen = sizeof(int), | |
1571 | .mode = 0644, | |
1572 | .proc_handler = &proc_do_defense_mode, | |
1573 | }, | |
1574 | #if 0 | |
1575 | { | |
1da177e4 LT |
1576 | .procname = "timeout_established", |
1577 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_ESTABLISHED], | |
1578 | .maxlen = sizeof(int), | |
1579 | .mode = 0644, | |
1580 | .proc_handler = &proc_dointvec_jiffies, | |
1581 | }, | |
1582 | { | |
1da177e4 LT |
1583 | .procname = "timeout_synsent", |
1584 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYN_SENT], | |
1585 | .maxlen = sizeof(int), | |
1586 | .mode = 0644, | |
1587 | .proc_handler = &proc_dointvec_jiffies, | |
1588 | }, | |
1589 | { | |
1da177e4 LT |
1590 | .procname = "timeout_synrecv", |
1591 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYN_RECV], | |
1592 | .maxlen = sizeof(int), | |
1593 | .mode = 0644, | |
1594 | .proc_handler = &proc_dointvec_jiffies, | |
1595 | }, | |
1596 | { | |
1da177e4 LT |
1597 | .procname = "timeout_finwait", |
1598 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_FIN_WAIT], | |
1599 | .maxlen = sizeof(int), | |
1600 | .mode = 0644, | |
1601 | .proc_handler = &proc_dointvec_jiffies, | |
1602 | }, | |
1603 | { | |
1da177e4 LT |
1604 | .procname = "timeout_timewait", |
1605 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_TIME_WAIT], | |
1606 | .maxlen = sizeof(int), | |
1607 | .mode = 0644, | |
1608 | .proc_handler = &proc_dointvec_jiffies, | |
1609 | }, | |
1610 | { | |
1da177e4 LT |
1611 | .procname = "timeout_close", |
1612 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_CLOSE], | |
1613 | .maxlen = sizeof(int), | |
1614 | .mode = 0644, | |
1615 | .proc_handler = &proc_dointvec_jiffies, | |
1616 | }, | |
1617 | { | |
1da177e4 LT |
1618 | .procname = "timeout_closewait", |
1619 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_CLOSE_WAIT], | |
1620 | .maxlen = sizeof(int), | |
1621 | .mode = 0644, | |
1622 | .proc_handler = &proc_dointvec_jiffies, | |
1623 | }, | |
1624 | { | |
1da177e4 LT |
1625 | .procname = "timeout_lastack", |
1626 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_LAST_ACK], | |
1627 | .maxlen = sizeof(int), | |
1628 | .mode = 0644, | |
1629 | .proc_handler = &proc_dointvec_jiffies, | |
1630 | }, | |
1631 | { | |
1da177e4 LT |
1632 | .procname = "timeout_listen", |
1633 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_LISTEN], | |
1634 | .maxlen = sizeof(int), | |
1635 | .mode = 0644, | |
1636 | .proc_handler = &proc_dointvec_jiffies, | |
1637 | }, | |
1638 | { | |
1da177e4 LT |
1639 | .procname = "timeout_synack", |
1640 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYNACK], | |
1641 | .maxlen = sizeof(int), | |
1642 | .mode = 0644, | |
1643 | .proc_handler = &proc_dointvec_jiffies, | |
1644 | }, | |
1645 | { | |
1da177e4 LT |
1646 | .procname = "timeout_udp", |
1647 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_UDP], | |
1648 | .maxlen = sizeof(int), | |
1649 | .mode = 0644, | |
1650 | .proc_handler = &proc_dointvec_jiffies, | |
1651 | }, | |
1652 | { | |
1da177e4 LT |
1653 | .procname = "timeout_icmp", |
1654 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_ICMP], | |
1655 | .maxlen = sizeof(int), | |
1656 | .mode = 0644, | |
1657 | .proc_handler = &proc_dointvec_jiffies, | |
1658 | }, | |
1659 | #endif | |
1660 | { | |
1da177e4 LT |
1661 | .procname = "cache_bypass", |
1662 | .data = &sysctl_ip_vs_cache_bypass, | |
1663 | .maxlen = sizeof(int), | |
1664 | .mode = 0644, | |
1665 | .proc_handler = &proc_dointvec, | |
1666 | }, | |
1667 | { | |
1da177e4 LT |
1668 | .procname = "expire_nodest_conn", |
1669 | .data = &sysctl_ip_vs_expire_nodest_conn, | |
1670 | .maxlen = sizeof(int), | |
1671 | .mode = 0644, | |
1672 | .proc_handler = &proc_dointvec, | |
1673 | }, | |
1674 | { | |
1da177e4 LT |
1675 | .procname = "expire_quiescent_template", |
1676 | .data = &sysctl_ip_vs_expire_quiescent_template, | |
1677 | .maxlen = sizeof(int), | |
1678 | .mode = 0644, | |
1679 | .proc_handler = &proc_dointvec, | |
1680 | }, | |
1681 | { | |
1da177e4 LT |
1682 | .procname = "sync_threshold", |
1683 | .data = &sysctl_ip_vs_sync_threshold, | |
1684 | .maxlen = sizeof(sysctl_ip_vs_sync_threshold), | |
1685 | .mode = 0644, | |
1686 | .proc_handler = &proc_do_sync_threshold, | |
1687 | }, | |
1688 | { | |
1da177e4 LT |
1689 | .procname = "nat_icmp_send", |
1690 | .data = &sysctl_ip_vs_nat_icmp_send, | |
1691 | .maxlen = sizeof(int), | |
1692 | .mode = 0644, | |
1693 | .proc_handler = &proc_dointvec, | |
1694 | }, | |
1695 | { .ctl_name = 0 } | |
1696 | }; | |
1697 | ||
5587da55 | 1698 | const struct ctl_path net_vs_ctl_path[] = { |
90754f8e PE |
1699 | { .procname = "net", .ctl_name = CTL_NET, }, |
1700 | { .procname = "ipv4", .ctl_name = NET_IPV4, }, | |
1701 | { .procname = "vs", }, | |
1702 | { } | |
1da177e4 | 1703 | }; |
90754f8e | 1704 | EXPORT_SYMBOL_GPL(net_vs_ctl_path); |
1da177e4 LT |
1705 | |
1706 | static struct ctl_table_header * sysctl_header; | |
1707 | ||
1708 | #ifdef CONFIG_PROC_FS | |
1709 | ||
1710 | struct ip_vs_iter { | |
1711 | struct list_head *table; | |
1712 | int bucket; | |
1713 | }; | |
1714 | ||
1715 | /* | |
1716 | * Write the contents of the VS rule table to a PROCfs file. | |
1717 | * (It is kept just for backward compatibility) | |
1718 | */ | |
1719 | static inline const char *ip_vs_fwd_name(unsigned flags) | |
1720 | { | |
1721 | switch (flags & IP_VS_CONN_F_FWD_MASK) { | |
1722 | case IP_VS_CONN_F_LOCALNODE: | |
1723 | return "Local"; | |
1724 | case IP_VS_CONN_F_TUNNEL: | |
1725 | return "Tunnel"; | |
1726 | case IP_VS_CONN_F_DROUTE: | |
1727 | return "Route"; | |
1728 | default: | |
1729 | return "Masq"; | |
1730 | } | |
1731 | } | |
1732 | ||
1733 | ||
1734 | /* Get the Nth entry in the two lists */ | |
1735 | static struct ip_vs_service *ip_vs_info_array(struct seq_file *seq, loff_t pos) | |
1736 | { | |
1737 | struct ip_vs_iter *iter = seq->private; | |
1738 | int idx; | |
1739 | struct ip_vs_service *svc; | |
1740 | ||
1741 | /* look in hash by protocol */ | |
1742 | for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
1743 | list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) { | |
1744 | if (pos-- == 0){ | |
1745 | iter->table = ip_vs_svc_table; | |
1746 | iter->bucket = idx; | |
1747 | return svc; | |
1748 | } | |
1749 | } | |
1750 | } | |
1751 | ||
1752 | /* keep looking in fwmark */ | |
1753 | for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
1754 | list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) { | |
1755 | if (pos-- == 0) { | |
1756 | iter->table = ip_vs_svc_fwm_table; | |
1757 | iter->bucket = idx; | |
1758 | return svc; | |
1759 | } | |
1760 | } | |
1761 | } | |
1762 | ||
1763 | return NULL; | |
1764 | } | |
1765 | ||
1766 | static void *ip_vs_info_seq_start(struct seq_file *seq, loff_t *pos) | |
1767 | { | |
1768 | ||
1769 | read_lock_bh(&__ip_vs_svc_lock); | |
1770 | return *pos ? ip_vs_info_array(seq, *pos - 1) : SEQ_START_TOKEN; | |
1771 | } | |
1772 | ||
1773 | ||
1774 | static void *ip_vs_info_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1775 | { | |
1776 | struct list_head *e; | |
1777 | struct ip_vs_iter *iter; | |
1778 | struct ip_vs_service *svc; | |
1779 | ||
1780 | ++*pos; | |
1781 | if (v == SEQ_START_TOKEN) | |
1782 | return ip_vs_info_array(seq,0); | |
1783 | ||
1784 | svc = v; | |
1785 | iter = seq->private; | |
1786 | ||
1787 | if (iter->table == ip_vs_svc_table) { | |
1788 | /* next service in table hashed by protocol */ | |
1789 | if ((e = svc->s_list.next) != &ip_vs_svc_table[iter->bucket]) | |
1790 | return list_entry(e, struct ip_vs_service, s_list); | |
1791 | ||
1792 | ||
1793 | while (++iter->bucket < IP_VS_SVC_TAB_SIZE) { | |
1794 | list_for_each_entry(svc,&ip_vs_svc_table[iter->bucket], | |
1795 | s_list) { | |
1796 | return svc; | |
1797 | } | |
1798 | } | |
1799 | ||
1800 | iter->table = ip_vs_svc_fwm_table; | |
1801 | iter->bucket = -1; | |
1802 | goto scan_fwmark; | |
1803 | } | |
1804 | ||
1805 | /* next service in hashed by fwmark */ | |
1806 | if ((e = svc->f_list.next) != &ip_vs_svc_fwm_table[iter->bucket]) | |
1807 | return list_entry(e, struct ip_vs_service, f_list); | |
1808 | ||
1809 | scan_fwmark: | |
1810 | while (++iter->bucket < IP_VS_SVC_TAB_SIZE) { | |
1811 | list_for_each_entry(svc, &ip_vs_svc_fwm_table[iter->bucket], | |
1812 | f_list) | |
1813 | return svc; | |
1814 | } | |
1815 | ||
1816 | return NULL; | |
1817 | } | |
1818 | ||
1819 | static void ip_vs_info_seq_stop(struct seq_file *seq, void *v) | |
1820 | { | |
1821 | read_unlock_bh(&__ip_vs_svc_lock); | |
1822 | } | |
1823 | ||
1824 | ||
1825 | static int ip_vs_info_seq_show(struct seq_file *seq, void *v) | |
1826 | { | |
1827 | if (v == SEQ_START_TOKEN) { | |
1828 | seq_printf(seq, | |
1829 | "IP Virtual Server version %d.%d.%d (size=%d)\n", | |
1830 | NVERSION(IP_VS_VERSION_CODE), IP_VS_CONN_TAB_SIZE); | |
1831 | seq_puts(seq, | |
1832 | "Prot LocalAddress:Port Scheduler Flags\n"); | |
1833 | seq_puts(seq, | |
1834 | " -> RemoteAddress:Port Forward Weight ActiveConn InActConn\n"); | |
1835 | } else { | |
1836 | const struct ip_vs_service *svc = v; | |
1837 | const struct ip_vs_iter *iter = seq->private; | |
1838 | const struct ip_vs_dest *dest; | |
1839 | ||
667a5f18 VB |
1840 | if (iter->table == ip_vs_svc_table) { |
1841 | #ifdef CONFIG_IP_VS_IPV6 | |
1842 | if (svc->af == AF_INET6) | |
1843 | seq_printf(seq, "%s [" NIP6_FMT "]:%04X %s ", | |
1844 | ip_vs_proto_name(svc->protocol), | |
1845 | NIP6(svc->addr.in6), | |
1846 | ntohs(svc->port), | |
1847 | svc->scheduler->name); | |
1848 | else | |
1849 | #endif | |
1850 | seq_printf(seq, "%s %08X:%04X %s ", | |
1851 | ip_vs_proto_name(svc->protocol), | |
1852 | ntohl(svc->addr.ip), | |
1853 | ntohs(svc->port), | |
1854 | svc->scheduler->name); | |
1855 | } else { | |
1da177e4 LT |
1856 | seq_printf(seq, "FWM %08X %s ", |
1857 | svc->fwmark, svc->scheduler->name); | |
667a5f18 | 1858 | } |
1da177e4 LT |
1859 | |
1860 | if (svc->flags & IP_VS_SVC_F_PERSISTENT) | |
1861 | seq_printf(seq, "persistent %d %08X\n", | |
1862 | svc->timeout, | |
1863 | ntohl(svc->netmask)); | |
1864 | else | |
1865 | seq_putc(seq, '\n'); | |
1866 | ||
1867 | list_for_each_entry(dest, &svc->destinations, n_list) { | |
667a5f18 VB |
1868 | #ifdef CONFIG_IP_VS_IPV6 |
1869 | if (dest->af == AF_INET6) | |
1870 | seq_printf(seq, | |
1871 | " -> [" NIP6_FMT "]:%04X" | |
1872 | " %-7s %-6d %-10d %-10d\n", | |
1873 | NIP6(dest->addr.in6), | |
1874 | ntohs(dest->port), | |
1875 | ip_vs_fwd_name(atomic_read(&dest->conn_flags)), | |
1876 | atomic_read(&dest->weight), | |
1877 | atomic_read(&dest->activeconns), | |
1878 | atomic_read(&dest->inactconns)); | |
1879 | else | |
1880 | #endif | |
1881 | seq_printf(seq, | |
1882 | " -> %08X:%04X " | |
1883 | "%-7s %-6d %-10d %-10d\n", | |
1884 | ntohl(dest->addr.ip), | |
1885 | ntohs(dest->port), | |
1886 | ip_vs_fwd_name(atomic_read(&dest->conn_flags)), | |
1887 | atomic_read(&dest->weight), | |
1888 | atomic_read(&dest->activeconns), | |
1889 | atomic_read(&dest->inactconns)); | |
1890 | ||
1da177e4 LT |
1891 | } |
1892 | } | |
1893 | return 0; | |
1894 | } | |
1895 | ||
56b3d975 | 1896 | static const struct seq_operations ip_vs_info_seq_ops = { |
1da177e4 LT |
1897 | .start = ip_vs_info_seq_start, |
1898 | .next = ip_vs_info_seq_next, | |
1899 | .stop = ip_vs_info_seq_stop, | |
1900 | .show = ip_vs_info_seq_show, | |
1901 | }; | |
1902 | ||
1903 | static int ip_vs_info_open(struct inode *inode, struct file *file) | |
1904 | { | |
cf7732e4 PE |
1905 | return seq_open_private(file, &ip_vs_info_seq_ops, |
1906 | sizeof(struct ip_vs_iter)); | |
1da177e4 LT |
1907 | } |
1908 | ||
9a32144e | 1909 | static const struct file_operations ip_vs_info_fops = { |
1da177e4 LT |
1910 | .owner = THIS_MODULE, |
1911 | .open = ip_vs_info_open, | |
1912 | .read = seq_read, | |
1913 | .llseek = seq_lseek, | |
1914 | .release = seq_release_private, | |
1915 | }; | |
1916 | ||
1917 | #endif | |
1918 | ||
519e49e8 SW |
1919 | struct ip_vs_stats ip_vs_stats = { |
1920 | .lock = __SPIN_LOCK_UNLOCKED(ip_vs_stats.lock), | |
1921 | }; | |
1da177e4 LT |
1922 | |
1923 | #ifdef CONFIG_PROC_FS | |
1924 | static int ip_vs_stats_show(struct seq_file *seq, void *v) | |
1925 | { | |
1926 | ||
1927 | /* 01234567 01234567 01234567 0123456701234567 0123456701234567 */ | |
1928 | seq_puts(seq, | |
1929 | " Total Incoming Outgoing Incoming Outgoing\n"); | |
1930 | seq_printf(seq, | |
1931 | " Conns Packets Packets Bytes Bytes\n"); | |
1932 | ||
1933 | spin_lock_bh(&ip_vs_stats.lock); | |
1934 | seq_printf(seq, "%8X %8X %8X %16LX %16LX\n\n", ip_vs_stats.conns, | |
1935 | ip_vs_stats.inpkts, ip_vs_stats.outpkts, | |
1936 | (unsigned long long) ip_vs_stats.inbytes, | |
1937 | (unsigned long long) ip_vs_stats.outbytes); | |
1938 | ||
1939 | /* 01234567 01234567 01234567 0123456701234567 0123456701234567 */ | |
1940 | seq_puts(seq, | |
1941 | " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n"); | |
1942 | seq_printf(seq,"%8X %8X %8X %16X %16X\n", | |
1943 | ip_vs_stats.cps, | |
1944 | ip_vs_stats.inpps, | |
1945 | ip_vs_stats.outpps, | |
1946 | ip_vs_stats.inbps, | |
1947 | ip_vs_stats.outbps); | |
1948 | spin_unlock_bh(&ip_vs_stats.lock); | |
1949 | ||
1950 | return 0; | |
1951 | } | |
1952 | ||
1953 | static int ip_vs_stats_seq_open(struct inode *inode, struct file *file) | |
1954 | { | |
1955 | return single_open(file, ip_vs_stats_show, NULL); | |
1956 | } | |
1957 | ||
9a32144e | 1958 | static const struct file_operations ip_vs_stats_fops = { |
1da177e4 LT |
1959 | .owner = THIS_MODULE, |
1960 | .open = ip_vs_stats_seq_open, | |
1961 | .read = seq_read, | |
1962 | .llseek = seq_lseek, | |
1963 | .release = single_release, | |
1964 | }; | |
1965 | ||
1966 | #endif | |
1967 | ||
1968 | /* | |
1969 | * Set timeout values for tcp tcpfin udp in the timeout_table. | |
1970 | */ | |
1971 | static int ip_vs_set_timeout(struct ip_vs_timeout_user *u) | |
1972 | { | |
1973 | IP_VS_DBG(2, "Setting timeout tcp:%d tcpfin:%d udp:%d\n", | |
1974 | u->tcp_timeout, | |
1975 | u->tcp_fin_timeout, | |
1976 | u->udp_timeout); | |
1977 | ||
1978 | #ifdef CONFIG_IP_VS_PROTO_TCP | |
1979 | if (u->tcp_timeout) { | |
1980 | ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_ESTABLISHED] | |
1981 | = u->tcp_timeout * HZ; | |
1982 | } | |
1983 | ||
1984 | if (u->tcp_fin_timeout) { | |
1985 | ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_FIN_WAIT] | |
1986 | = u->tcp_fin_timeout * HZ; | |
1987 | } | |
1988 | #endif | |
1989 | ||
1990 | #ifdef CONFIG_IP_VS_PROTO_UDP | |
1991 | if (u->udp_timeout) { | |
1992 | ip_vs_protocol_udp.timeout_table[IP_VS_UDP_S_NORMAL] | |
1993 | = u->udp_timeout * HZ; | |
1994 | } | |
1995 | #endif | |
1996 | return 0; | |
1997 | } | |
1998 | ||
1999 | ||
2000 | #define SET_CMDID(cmd) (cmd - IP_VS_BASE_CTL) | |
2001 | #define SERVICE_ARG_LEN (sizeof(struct ip_vs_service_user)) | |
2002 | #define SVCDEST_ARG_LEN (sizeof(struct ip_vs_service_user) + \ | |
2003 | sizeof(struct ip_vs_dest_user)) | |
2004 | #define TIMEOUT_ARG_LEN (sizeof(struct ip_vs_timeout_user)) | |
2005 | #define DAEMON_ARG_LEN (sizeof(struct ip_vs_daemon_user)) | |
2006 | #define MAX_ARG_LEN SVCDEST_ARG_LEN | |
2007 | ||
9b5b5cff | 2008 | static const unsigned char set_arglen[SET_CMDID(IP_VS_SO_SET_MAX)+1] = { |
1da177e4 LT |
2009 | [SET_CMDID(IP_VS_SO_SET_ADD)] = SERVICE_ARG_LEN, |
2010 | [SET_CMDID(IP_VS_SO_SET_EDIT)] = SERVICE_ARG_LEN, | |
2011 | [SET_CMDID(IP_VS_SO_SET_DEL)] = SERVICE_ARG_LEN, | |
2012 | [SET_CMDID(IP_VS_SO_SET_FLUSH)] = 0, | |
2013 | [SET_CMDID(IP_VS_SO_SET_ADDDEST)] = SVCDEST_ARG_LEN, | |
2014 | [SET_CMDID(IP_VS_SO_SET_DELDEST)] = SVCDEST_ARG_LEN, | |
2015 | [SET_CMDID(IP_VS_SO_SET_EDITDEST)] = SVCDEST_ARG_LEN, | |
2016 | [SET_CMDID(IP_VS_SO_SET_TIMEOUT)] = TIMEOUT_ARG_LEN, | |
2017 | [SET_CMDID(IP_VS_SO_SET_STARTDAEMON)] = DAEMON_ARG_LEN, | |
2018 | [SET_CMDID(IP_VS_SO_SET_STOPDAEMON)] = DAEMON_ARG_LEN, | |
2019 | [SET_CMDID(IP_VS_SO_SET_ZERO)] = SERVICE_ARG_LEN, | |
2020 | }; | |
2021 | ||
c860c6b1 JV |
2022 | static void ip_vs_copy_usvc_compat(struct ip_vs_service_user_kern *usvc, |
2023 | struct ip_vs_service_user *usvc_compat) | |
2024 | { | |
2025 | usvc->af = AF_INET; | |
2026 | usvc->protocol = usvc_compat->protocol; | |
2027 | usvc->addr.ip = usvc_compat->addr; | |
2028 | usvc->port = usvc_compat->port; | |
2029 | usvc->fwmark = usvc_compat->fwmark; | |
2030 | ||
2031 | /* Deep copy of sched_name is not needed here */ | |
2032 | usvc->sched_name = usvc_compat->sched_name; | |
2033 | ||
2034 | usvc->flags = usvc_compat->flags; | |
2035 | usvc->timeout = usvc_compat->timeout; | |
2036 | usvc->netmask = usvc_compat->netmask; | |
2037 | } | |
2038 | ||
2039 | static void ip_vs_copy_udest_compat(struct ip_vs_dest_user_kern *udest, | |
2040 | struct ip_vs_dest_user *udest_compat) | |
2041 | { | |
2042 | udest->addr.ip = udest_compat->addr; | |
2043 | udest->port = udest_compat->port; | |
2044 | udest->conn_flags = udest_compat->conn_flags; | |
2045 | udest->weight = udest_compat->weight; | |
2046 | udest->u_threshold = udest_compat->u_threshold; | |
2047 | udest->l_threshold = udest_compat->l_threshold; | |
2048 | } | |
2049 | ||
1da177e4 LT |
2050 | static int |
2051 | do_ip_vs_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len) | |
2052 | { | |
2053 | int ret; | |
2054 | unsigned char arg[MAX_ARG_LEN]; | |
c860c6b1 JV |
2055 | struct ip_vs_service_user *usvc_compat; |
2056 | struct ip_vs_service_user_kern usvc; | |
1da177e4 | 2057 | struct ip_vs_service *svc; |
c860c6b1 JV |
2058 | struct ip_vs_dest_user *udest_compat; |
2059 | struct ip_vs_dest_user_kern udest; | |
1da177e4 LT |
2060 | |
2061 | if (!capable(CAP_NET_ADMIN)) | |
2062 | return -EPERM; | |
2063 | ||
2064 | if (len != set_arglen[SET_CMDID(cmd)]) { | |
2065 | IP_VS_ERR("set_ctl: len %u != %u\n", | |
2066 | len, set_arglen[SET_CMDID(cmd)]); | |
2067 | return -EINVAL; | |
2068 | } | |
2069 | ||
2070 | if (copy_from_user(arg, user, len) != 0) | |
2071 | return -EFAULT; | |
2072 | ||
2073 | /* increase the module use count */ | |
2074 | ip_vs_use_count_inc(); | |
2075 | ||
14cc3e2b | 2076 | if (mutex_lock_interruptible(&__ip_vs_mutex)) { |
1da177e4 LT |
2077 | ret = -ERESTARTSYS; |
2078 | goto out_dec; | |
2079 | } | |
2080 | ||
2081 | if (cmd == IP_VS_SO_SET_FLUSH) { | |
2082 | /* Flush the virtual service */ | |
2083 | ret = ip_vs_flush(); | |
2084 | goto out_unlock; | |
2085 | } else if (cmd == IP_VS_SO_SET_TIMEOUT) { | |
2086 | /* Set timeout values for (tcp tcpfin udp) */ | |
2087 | ret = ip_vs_set_timeout((struct ip_vs_timeout_user *)arg); | |
2088 | goto out_unlock; | |
2089 | } else if (cmd == IP_VS_SO_SET_STARTDAEMON) { | |
2090 | struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg; | |
2091 | ret = start_sync_thread(dm->state, dm->mcast_ifn, dm->syncid); | |
2092 | goto out_unlock; | |
2093 | } else if (cmd == IP_VS_SO_SET_STOPDAEMON) { | |
2094 | struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg; | |
2095 | ret = stop_sync_thread(dm->state); | |
2096 | goto out_unlock; | |
2097 | } | |
2098 | ||
c860c6b1 JV |
2099 | usvc_compat = (struct ip_vs_service_user *)arg; |
2100 | udest_compat = (struct ip_vs_dest_user *)(usvc_compat + 1); | |
2101 | ||
2102 | /* We only use the new structs internally, so copy userspace compat | |
2103 | * structs to extended internal versions */ | |
2104 | ip_vs_copy_usvc_compat(&usvc, usvc_compat); | |
2105 | ip_vs_copy_udest_compat(&udest, udest_compat); | |
1da177e4 LT |
2106 | |
2107 | if (cmd == IP_VS_SO_SET_ZERO) { | |
2108 | /* if no service address is set, zero counters in all */ | |
c860c6b1 | 2109 | if (!usvc.fwmark && !usvc.addr.ip && !usvc.port) { |
1da177e4 LT |
2110 | ret = ip_vs_zero_all(); |
2111 | goto out_unlock; | |
2112 | } | |
2113 | } | |
2114 | ||
2115 | /* Check for valid protocol: TCP or UDP, even for fwmark!=0 */ | |
c860c6b1 | 2116 | if (usvc.protocol != IPPROTO_TCP && usvc.protocol != IPPROTO_UDP) { |
1da177e4 | 2117 | IP_VS_ERR("set_ctl: invalid protocol: %d %d.%d.%d.%d:%d %s\n", |
c860c6b1 JV |
2118 | usvc.protocol, NIPQUAD(usvc.addr.ip), |
2119 | ntohs(usvc.port), usvc.sched_name); | |
1da177e4 LT |
2120 | ret = -EFAULT; |
2121 | goto out_unlock; | |
2122 | } | |
2123 | ||
2124 | /* Lookup the exact service by <protocol, addr, port> or fwmark */ | |
c860c6b1 | 2125 | if (usvc.fwmark == 0) |
b18610de JV |
2126 | svc = __ip_vs_service_get(usvc.af, usvc.protocol, |
2127 | &usvc.addr, usvc.port); | |
1da177e4 | 2128 | else |
b18610de | 2129 | svc = __ip_vs_svc_fwm_get(usvc.af, usvc.fwmark); |
1da177e4 LT |
2130 | |
2131 | if (cmd != IP_VS_SO_SET_ADD | |
c860c6b1 | 2132 | && (svc == NULL || svc->protocol != usvc.protocol)) { |
1da177e4 LT |
2133 | ret = -ESRCH; |
2134 | goto out_unlock; | |
2135 | } | |
2136 | ||
2137 | switch (cmd) { | |
2138 | case IP_VS_SO_SET_ADD: | |
2139 | if (svc != NULL) | |
2140 | ret = -EEXIST; | |
2141 | else | |
c860c6b1 | 2142 | ret = ip_vs_add_service(&usvc, &svc); |
1da177e4 LT |
2143 | break; |
2144 | case IP_VS_SO_SET_EDIT: | |
c860c6b1 | 2145 | ret = ip_vs_edit_service(svc, &usvc); |
1da177e4 LT |
2146 | break; |
2147 | case IP_VS_SO_SET_DEL: | |
2148 | ret = ip_vs_del_service(svc); | |
2149 | if (!ret) | |
2150 | goto out_unlock; | |
2151 | break; | |
2152 | case IP_VS_SO_SET_ZERO: | |
2153 | ret = ip_vs_zero_service(svc); | |
2154 | break; | |
2155 | case IP_VS_SO_SET_ADDDEST: | |
c860c6b1 | 2156 | ret = ip_vs_add_dest(svc, &udest); |
1da177e4 LT |
2157 | break; |
2158 | case IP_VS_SO_SET_EDITDEST: | |
c860c6b1 | 2159 | ret = ip_vs_edit_dest(svc, &udest); |
1da177e4 LT |
2160 | break; |
2161 | case IP_VS_SO_SET_DELDEST: | |
c860c6b1 | 2162 | ret = ip_vs_del_dest(svc, &udest); |
1da177e4 LT |
2163 | break; |
2164 | default: | |
2165 | ret = -EINVAL; | |
2166 | } | |
2167 | ||
2168 | if (svc) | |
2169 | ip_vs_service_put(svc); | |
2170 | ||
2171 | out_unlock: | |
14cc3e2b | 2172 | mutex_unlock(&__ip_vs_mutex); |
1da177e4 LT |
2173 | out_dec: |
2174 | /* decrease the module use count */ | |
2175 | ip_vs_use_count_dec(); | |
2176 | ||
2177 | return ret; | |
2178 | } | |
2179 | ||
2180 | ||
2181 | static void | |
2182 | ip_vs_copy_stats(struct ip_vs_stats_user *dst, struct ip_vs_stats *src) | |
2183 | { | |
2184 | spin_lock_bh(&src->lock); | |
2185 | memcpy(dst, src, (char*)&src->lock - (char*)src); | |
2186 | spin_unlock_bh(&src->lock); | |
2187 | } | |
2188 | ||
2189 | static void | |
2190 | ip_vs_copy_service(struct ip_vs_service_entry *dst, struct ip_vs_service *src) | |
2191 | { | |
2192 | dst->protocol = src->protocol; | |
e7ade46a | 2193 | dst->addr = src->addr.ip; |
1da177e4 LT |
2194 | dst->port = src->port; |
2195 | dst->fwmark = src->fwmark; | |
4da62fc7 | 2196 | strlcpy(dst->sched_name, src->scheduler->name, sizeof(dst->sched_name)); |
1da177e4 LT |
2197 | dst->flags = src->flags; |
2198 | dst->timeout = src->timeout / HZ; | |
2199 | dst->netmask = src->netmask; | |
2200 | dst->num_dests = src->num_dests; | |
2201 | ip_vs_copy_stats(&dst->stats, &src->stats); | |
2202 | } | |
2203 | ||
2204 | static inline int | |
2205 | __ip_vs_get_service_entries(const struct ip_vs_get_services *get, | |
2206 | struct ip_vs_get_services __user *uptr) | |
2207 | { | |
2208 | int idx, count=0; | |
2209 | struct ip_vs_service *svc; | |
2210 | struct ip_vs_service_entry entry; | |
2211 | int ret = 0; | |
2212 | ||
2213 | for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
2214 | list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) { | |
2215 | if (count >= get->num_services) | |
2216 | goto out; | |
4da62fc7 | 2217 | memset(&entry, 0, sizeof(entry)); |
1da177e4 LT |
2218 | ip_vs_copy_service(&entry, svc); |
2219 | if (copy_to_user(&uptr->entrytable[count], | |
2220 | &entry, sizeof(entry))) { | |
2221 | ret = -EFAULT; | |
2222 | goto out; | |
2223 | } | |
2224 | count++; | |
2225 | } | |
2226 | } | |
2227 | ||
2228 | for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
2229 | list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) { | |
2230 | if (count >= get->num_services) | |
2231 | goto out; | |
4da62fc7 | 2232 | memset(&entry, 0, sizeof(entry)); |
1da177e4 LT |
2233 | ip_vs_copy_service(&entry, svc); |
2234 | if (copy_to_user(&uptr->entrytable[count], | |
2235 | &entry, sizeof(entry))) { | |
2236 | ret = -EFAULT; | |
2237 | goto out; | |
2238 | } | |
2239 | count++; | |
2240 | } | |
2241 | } | |
2242 | out: | |
2243 | return ret; | |
2244 | } | |
2245 | ||
2246 | static inline int | |
2247 | __ip_vs_get_dest_entries(const struct ip_vs_get_dests *get, | |
2248 | struct ip_vs_get_dests __user *uptr) | |
2249 | { | |
2250 | struct ip_vs_service *svc; | |
b18610de | 2251 | union nf_inet_addr addr = { .ip = get->addr }; |
1da177e4 LT |
2252 | int ret = 0; |
2253 | ||
2254 | if (get->fwmark) | |
b18610de | 2255 | svc = __ip_vs_svc_fwm_get(AF_INET, get->fwmark); |
1da177e4 | 2256 | else |
b18610de JV |
2257 | svc = __ip_vs_service_get(AF_INET, get->protocol, &addr, |
2258 | get->port); | |
2259 | ||
1da177e4 LT |
2260 | if (svc) { |
2261 | int count = 0; | |
2262 | struct ip_vs_dest *dest; | |
2263 | struct ip_vs_dest_entry entry; | |
2264 | ||
2265 | list_for_each_entry(dest, &svc->destinations, n_list) { | |
2266 | if (count >= get->num_dests) | |
2267 | break; | |
2268 | ||
e7ade46a | 2269 | entry.addr = dest->addr.ip; |
1da177e4 LT |
2270 | entry.port = dest->port; |
2271 | entry.conn_flags = atomic_read(&dest->conn_flags); | |
2272 | entry.weight = atomic_read(&dest->weight); | |
2273 | entry.u_threshold = dest->u_threshold; | |
2274 | entry.l_threshold = dest->l_threshold; | |
2275 | entry.activeconns = atomic_read(&dest->activeconns); | |
2276 | entry.inactconns = atomic_read(&dest->inactconns); | |
2277 | entry.persistconns = atomic_read(&dest->persistconns); | |
2278 | ip_vs_copy_stats(&entry.stats, &dest->stats); | |
2279 | if (copy_to_user(&uptr->entrytable[count], | |
2280 | &entry, sizeof(entry))) { | |
2281 | ret = -EFAULT; | |
2282 | break; | |
2283 | } | |
2284 | count++; | |
2285 | } | |
2286 | ip_vs_service_put(svc); | |
2287 | } else | |
2288 | ret = -ESRCH; | |
2289 | return ret; | |
2290 | } | |
2291 | ||
2292 | static inline void | |
2293 | __ip_vs_get_timeouts(struct ip_vs_timeout_user *u) | |
2294 | { | |
2295 | #ifdef CONFIG_IP_VS_PROTO_TCP | |
2296 | u->tcp_timeout = | |
2297 | ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_ESTABLISHED] / HZ; | |
2298 | u->tcp_fin_timeout = | |
2299 | ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_FIN_WAIT] / HZ; | |
2300 | #endif | |
2301 | #ifdef CONFIG_IP_VS_PROTO_UDP | |
2302 | u->udp_timeout = | |
2303 | ip_vs_protocol_udp.timeout_table[IP_VS_UDP_S_NORMAL] / HZ; | |
2304 | #endif | |
2305 | } | |
2306 | ||
2307 | ||
2308 | #define GET_CMDID(cmd) (cmd - IP_VS_BASE_CTL) | |
2309 | #define GET_INFO_ARG_LEN (sizeof(struct ip_vs_getinfo)) | |
2310 | #define GET_SERVICES_ARG_LEN (sizeof(struct ip_vs_get_services)) | |
2311 | #define GET_SERVICE_ARG_LEN (sizeof(struct ip_vs_service_entry)) | |
2312 | #define GET_DESTS_ARG_LEN (sizeof(struct ip_vs_get_dests)) | |
2313 | #define GET_TIMEOUT_ARG_LEN (sizeof(struct ip_vs_timeout_user)) | |
2314 | #define GET_DAEMON_ARG_LEN (sizeof(struct ip_vs_daemon_user) * 2) | |
2315 | ||
9b5b5cff | 2316 | static const unsigned char get_arglen[GET_CMDID(IP_VS_SO_GET_MAX)+1] = { |
1da177e4 LT |
2317 | [GET_CMDID(IP_VS_SO_GET_VERSION)] = 64, |
2318 | [GET_CMDID(IP_VS_SO_GET_INFO)] = GET_INFO_ARG_LEN, | |
2319 | [GET_CMDID(IP_VS_SO_GET_SERVICES)] = GET_SERVICES_ARG_LEN, | |
2320 | [GET_CMDID(IP_VS_SO_GET_SERVICE)] = GET_SERVICE_ARG_LEN, | |
2321 | [GET_CMDID(IP_VS_SO_GET_DESTS)] = GET_DESTS_ARG_LEN, | |
2322 | [GET_CMDID(IP_VS_SO_GET_TIMEOUT)] = GET_TIMEOUT_ARG_LEN, | |
2323 | [GET_CMDID(IP_VS_SO_GET_DAEMON)] = GET_DAEMON_ARG_LEN, | |
2324 | }; | |
2325 | ||
2326 | static int | |
2327 | do_ip_vs_get_ctl(struct sock *sk, int cmd, void __user *user, int *len) | |
2328 | { | |
2329 | unsigned char arg[128]; | |
2330 | int ret = 0; | |
2331 | ||
2332 | if (!capable(CAP_NET_ADMIN)) | |
2333 | return -EPERM; | |
2334 | ||
2335 | if (*len < get_arglen[GET_CMDID(cmd)]) { | |
2336 | IP_VS_ERR("get_ctl: len %u < %u\n", | |
2337 | *len, get_arglen[GET_CMDID(cmd)]); | |
2338 | return -EINVAL; | |
2339 | } | |
2340 | ||
2341 | if (copy_from_user(arg, user, get_arglen[GET_CMDID(cmd)]) != 0) | |
2342 | return -EFAULT; | |
2343 | ||
14cc3e2b | 2344 | if (mutex_lock_interruptible(&__ip_vs_mutex)) |
1da177e4 LT |
2345 | return -ERESTARTSYS; |
2346 | ||
2347 | switch (cmd) { | |
2348 | case IP_VS_SO_GET_VERSION: | |
2349 | { | |
2350 | char buf[64]; | |
2351 | ||
2352 | sprintf(buf, "IP Virtual Server version %d.%d.%d (size=%d)", | |
2353 | NVERSION(IP_VS_VERSION_CODE), IP_VS_CONN_TAB_SIZE); | |
2354 | if (copy_to_user(user, buf, strlen(buf)+1) != 0) { | |
2355 | ret = -EFAULT; | |
2356 | goto out; | |
2357 | } | |
2358 | *len = strlen(buf)+1; | |
2359 | } | |
2360 | break; | |
2361 | ||
2362 | case IP_VS_SO_GET_INFO: | |
2363 | { | |
2364 | struct ip_vs_getinfo info; | |
2365 | info.version = IP_VS_VERSION_CODE; | |
2366 | info.size = IP_VS_CONN_TAB_SIZE; | |
2367 | info.num_services = ip_vs_num_services; | |
2368 | if (copy_to_user(user, &info, sizeof(info)) != 0) | |
2369 | ret = -EFAULT; | |
2370 | } | |
2371 | break; | |
2372 | ||
2373 | case IP_VS_SO_GET_SERVICES: | |
2374 | { | |
2375 | struct ip_vs_get_services *get; | |
2376 | int size; | |
2377 | ||
2378 | get = (struct ip_vs_get_services *)arg; | |
2379 | size = sizeof(*get) + | |
2380 | sizeof(struct ip_vs_service_entry) * get->num_services; | |
2381 | if (*len != size) { | |
2382 | IP_VS_ERR("length: %u != %u\n", *len, size); | |
2383 | ret = -EINVAL; | |
2384 | goto out; | |
2385 | } | |
2386 | ret = __ip_vs_get_service_entries(get, user); | |
2387 | } | |
2388 | break; | |
2389 | ||
2390 | case IP_VS_SO_GET_SERVICE: | |
2391 | { | |
2392 | struct ip_vs_service_entry *entry; | |
2393 | struct ip_vs_service *svc; | |
b18610de | 2394 | union nf_inet_addr addr; |
1da177e4 LT |
2395 | |
2396 | entry = (struct ip_vs_service_entry *)arg; | |
b18610de | 2397 | addr.ip = entry->addr; |
1da177e4 | 2398 | if (entry->fwmark) |
b18610de | 2399 | svc = __ip_vs_svc_fwm_get(AF_INET, entry->fwmark); |
1da177e4 | 2400 | else |
b18610de JV |
2401 | svc = __ip_vs_service_get(AF_INET, entry->protocol, |
2402 | &addr, entry->port); | |
1da177e4 LT |
2403 | if (svc) { |
2404 | ip_vs_copy_service(entry, svc); | |
2405 | if (copy_to_user(user, entry, sizeof(*entry)) != 0) | |
2406 | ret = -EFAULT; | |
2407 | ip_vs_service_put(svc); | |
2408 | } else | |
2409 | ret = -ESRCH; | |
2410 | } | |
2411 | break; | |
2412 | ||
2413 | case IP_VS_SO_GET_DESTS: | |
2414 | { | |
2415 | struct ip_vs_get_dests *get; | |
2416 | int size; | |
2417 | ||
2418 | get = (struct ip_vs_get_dests *)arg; | |
2419 | size = sizeof(*get) + | |
2420 | sizeof(struct ip_vs_dest_entry) * get->num_dests; | |
2421 | if (*len != size) { | |
2422 | IP_VS_ERR("length: %u != %u\n", *len, size); | |
2423 | ret = -EINVAL; | |
2424 | goto out; | |
2425 | } | |
2426 | ret = __ip_vs_get_dest_entries(get, user); | |
2427 | } | |
2428 | break; | |
2429 | ||
2430 | case IP_VS_SO_GET_TIMEOUT: | |
2431 | { | |
2432 | struct ip_vs_timeout_user t; | |
2433 | ||
2434 | __ip_vs_get_timeouts(&t); | |
2435 | if (copy_to_user(user, &t, sizeof(t)) != 0) | |
2436 | ret = -EFAULT; | |
2437 | } | |
2438 | break; | |
2439 | ||
2440 | case IP_VS_SO_GET_DAEMON: | |
2441 | { | |
2442 | struct ip_vs_daemon_user d[2]; | |
2443 | ||
2444 | memset(&d, 0, sizeof(d)); | |
2445 | if (ip_vs_sync_state & IP_VS_STATE_MASTER) { | |
2446 | d[0].state = IP_VS_STATE_MASTER; | |
4da62fc7 | 2447 | strlcpy(d[0].mcast_ifn, ip_vs_master_mcast_ifn, sizeof(d[0].mcast_ifn)); |
1da177e4 LT |
2448 | d[0].syncid = ip_vs_master_syncid; |
2449 | } | |
2450 | if (ip_vs_sync_state & IP_VS_STATE_BACKUP) { | |
2451 | d[1].state = IP_VS_STATE_BACKUP; | |
4da62fc7 | 2452 | strlcpy(d[1].mcast_ifn, ip_vs_backup_mcast_ifn, sizeof(d[1].mcast_ifn)); |
1da177e4 LT |
2453 | d[1].syncid = ip_vs_backup_syncid; |
2454 | } | |
2455 | if (copy_to_user(user, &d, sizeof(d)) != 0) | |
2456 | ret = -EFAULT; | |
2457 | } | |
2458 | break; | |
2459 | ||
2460 | default: | |
2461 | ret = -EINVAL; | |
2462 | } | |
2463 | ||
2464 | out: | |
14cc3e2b | 2465 | mutex_unlock(&__ip_vs_mutex); |
1da177e4 LT |
2466 | return ret; |
2467 | } | |
2468 | ||
2469 | ||
2470 | static struct nf_sockopt_ops ip_vs_sockopts = { | |
2471 | .pf = PF_INET, | |
2472 | .set_optmin = IP_VS_BASE_CTL, | |
2473 | .set_optmax = IP_VS_SO_SET_MAX+1, | |
2474 | .set = do_ip_vs_set_ctl, | |
2475 | .get_optmin = IP_VS_BASE_CTL, | |
2476 | .get_optmax = IP_VS_SO_GET_MAX+1, | |
2477 | .get = do_ip_vs_get_ctl, | |
16fcec35 | 2478 | .owner = THIS_MODULE, |
1da177e4 LT |
2479 | }; |
2480 | ||
9a812198 JV |
2481 | /* |
2482 | * Generic Netlink interface | |
2483 | */ | |
2484 | ||
2485 | /* IPVS genetlink family */ | |
2486 | static struct genl_family ip_vs_genl_family = { | |
2487 | .id = GENL_ID_GENERATE, | |
2488 | .hdrsize = 0, | |
2489 | .name = IPVS_GENL_NAME, | |
2490 | .version = IPVS_GENL_VERSION, | |
2491 | .maxattr = IPVS_CMD_MAX, | |
2492 | }; | |
2493 | ||
2494 | /* Policy used for first-level command attributes */ | |
2495 | static const struct nla_policy ip_vs_cmd_policy[IPVS_CMD_ATTR_MAX + 1] = { | |
2496 | [IPVS_CMD_ATTR_SERVICE] = { .type = NLA_NESTED }, | |
2497 | [IPVS_CMD_ATTR_DEST] = { .type = NLA_NESTED }, | |
2498 | [IPVS_CMD_ATTR_DAEMON] = { .type = NLA_NESTED }, | |
2499 | [IPVS_CMD_ATTR_TIMEOUT_TCP] = { .type = NLA_U32 }, | |
2500 | [IPVS_CMD_ATTR_TIMEOUT_TCP_FIN] = { .type = NLA_U32 }, | |
2501 | [IPVS_CMD_ATTR_TIMEOUT_UDP] = { .type = NLA_U32 }, | |
2502 | }; | |
2503 | ||
2504 | /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DAEMON */ | |
2505 | static const struct nla_policy ip_vs_daemon_policy[IPVS_DAEMON_ATTR_MAX + 1] = { | |
2506 | [IPVS_DAEMON_ATTR_STATE] = { .type = NLA_U32 }, | |
2507 | [IPVS_DAEMON_ATTR_MCAST_IFN] = { .type = NLA_NUL_STRING, | |
2508 | .len = IP_VS_IFNAME_MAXLEN }, | |
2509 | [IPVS_DAEMON_ATTR_SYNC_ID] = { .type = NLA_U32 }, | |
2510 | }; | |
2511 | ||
2512 | /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_SERVICE */ | |
2513 | static const struct nla_policy ip_vs_svc_policy[IPVS_SVC_ATTR_MAX + 1] = { | |
2514 | [IPVS_SVC_ATTR_AF] = { .type = NLA_U16 }, | |
2515 | [IPVS_SVC_ATTR_PROTOCOL] = { .type = NLA_U16 }, | |
2516 | [IPVS_SVC_ATTR_ADDR] = { .type = NLA_BINARY, | |
2517 | .len = sizeof(union nf_inet_addr) }, | |
2518 | [IPVS_SVC_ATTR_PORT] = { .type = NLA_U16 }, | |
2519 | [IPVS_SVC_ATTR_FWMARK] = { .type = NLA_U32 }, | |
2520 | [IPVS_SVC_ATTR_SCHED_NAME] = { .type = NLA_NUL_STRING, | |
2521 | .len = IP_VS_SCHEDNAME_MAXLEN }, | |
2522 | [IPVS_SVC_ATTR_FLAGS] = { .type = NLA_BINARY, | |
2523 | .len = sizeof(struct ip_vs_flags) }, | |
2524 | [IPVS_SVC_ATTR_TIMEOUT] = { .type = NLA_U32 }, | |
2525 | [IPVS_SVC_ATTR_NETMASK] = { .type = NLA_U32 }, | |
2526 | [IPVS_SVC_ATTR_STATS] = { .type = NLA_NESTED }, | |
2527 | }; | |
2528 | ||
2529 | /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DEST */ | |
2530 | static const struct nla_policy ip_vs_dest_policy[IPVS_DEST_ATTR_MAX + 1] = { | |
2531 | [IPVS_DEST_ATTR_ADDR] = { .type = NLA_BINARY, | |
2532 | .len = sizeof(union nf_inet_addr) }, | |
2533 | [IPVS_DEST_ATTR_PORT] = { .type = NLA_U16 }, | |
2534 | [IPVS_DEST_ATTR_FWD_METHOD] = { .type = NLA_U32 }, | |
2535 | [IPVS_DEST_ATTR_WEIGHT] = { .type = NLA_U32 }, | |
2536 | [IPVS_DEST_ATTR_U_THRESH] = { .type = NLA_U32 }, | |
2537 | [IPVS_DEST_ATTR_L_THRESH] = { .type = NLA_U32 }, | |
2538 | [IPVS_DEST_ATTR_ACTIVE_CONNS] = { .type = NLA_U32 }, | |
2539 | [IPVS_DEST_ATTR_INACT_CONNS] = { .type = NLA_U32 }, | |
2540 | [IPVS_DEST_ATTR_PERSIST_CONNS] = { .type = NLA_U32 }, | |
2541 | [IPVS_DEST_ATTR_STATS] = { .type = NLA_NESTED }, | |
2542 | }; | |
2543 | ||
2544 | static int ip_vs_genl_fill_stats(struct sk_buff *skb, int container_type, | |
2545 | struct ip_vs_stats *stats) | |
2546 | { | |
2547 | struct nlattr *nl_stats = nla_nest_start(skb, container_type); | |
2548 | if (!nl_stats) | |
2549 | return -EMSGSIZE; | |
2550 | ||
2551 | spin_lock_bh(&stats->lock); | |
2552 | ||
2553 | NLA_PUT_U32(skb, IPVS_STATS_ATTR_CONNS, stats->conns); | |
2554 | NLA_PUT_U32(skb, IPVS_STATS_ATTR_INPKTS, stats->inpkts); | |
2555 | NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTPKTS, stats->outpkts); | |
2556 | NLA_PUT_U64(skb, IPVS_STATS_ATTR_INBYTES, stats->inbytes); | |
2557 | NLA_PUT_U64(skb, IPVS_STATS_ATTR_OUTBYTES, stats->outbytes); | |
2558 | NLA_PUT_U32(skb, IPVS_STATS_ATTR_CPS, stats->cps); | |
2559 | NLA_PUT_U32(skb, IPVS_STATS_ATTR_INPPS, stats->inpps); | |
2560 | NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTPPS, stats->outpps); | |
2561 | NLA_PUT_U32(skb, IPVS_STATS_ATTR_INBPS, stats->inbps); | |
2562 | NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTBPS, stats->outbps); | |
2563 | ||
2564 | spin_unlock_bh(&stats->lock); | |
2565 | ||
2566 | nla_nest_end(skb, nl_stats); | |
2567 | ||
2568 | return 0; | |
2569 | ||
2570 | nla_put_failure: | |
2571 | spin_unlock_bh(&stats->lock); | |
2572 | nla_nest_cancel(skb, nl_stats); | |
2573 | return -EMSGSIZE; | |
2574 | } | |
2575 | ||
2576 | static int ip_vs_genl_fill_service(struct sk_buff *skb, | |
2577 | struct ip_vs_service *svc) | |
2578 | { | |
2579 | struct nlattr *nl_service; | |
2580 | struct ip_vs_flags flags = { .flags = svc->flags, | |
2581 | .mask = ~0 }; | |
2582 | ||
2583 | nl_service = nla_nest_start(skb, IPVS_CMD_ATTR_SERVICE); | |
2584 | if (!nl_service) | |
2585 | return -EMSGSIZE; | |
2586 | ||
2587 | NLA_PUT_U16(skb, IPVS_SVC_ATTR_AF, AF_INET); | |
2588 | ||
2589 | if (svc->fwmark) { | |
2590 | NLA_PUT_U32(skb, IPVS_SVC_ATTR_FWMARK, svc->fwmark); | |
2591 | } else { | |
2592 | NLA_PUT_U16(skb, IPVS_SVC_ATTR_PROTOCOL, svc->protocol); | |
2593 | NLA_PUT(skb, IPVS_SVC_ATTR_ADDR, sizeof(svc->addr), &svc->addr); | |
2594 | NLA_PUT_U16(skb, IPVS_SVC_ATTR_PORT, svc->port); | |
2595 | } | |
2596 | ||
2597 | NLA_PUT_STRING(skb, IPVS_SVC_ATTR_SCHED_NAME, svc->scheduler->name); | |
2598 | NLA_PUT(skb, IPVS_SVC_ATTR_FLAGS, sizeof(flags), &flags); | |
2599 | NLA_PUT_U32(skb, IPVS_SVC_ATTR_TIMEOUT, svc->timeout / HZ); | |
2600 | NLA_PUT_U32(skb, IPVS_SVC_ATTR_NETMASK, svc->netmask); | |
2601 | ||
2602 | if (ip_vs_genl_fill_stats(skb, IPVS_SVC_ATTR_STATS, &svc->stats)) | |
2603 | goto nla_put_failure; | |
2604 | ||
2605 | nla_nest_end(skb, nl_service); | |
2606 | ||
2607 | return 0; | |
2608 | ||
2609 | nla_put_failure: | |
2610 | nla_nest_cancel(skb, nl_service); | |
2611 | return -EMSGSIZE; | |
2612 | } | |
2613 | ||
2614 | static int ip_vs_genl_dump_service(struct sk_buff *skb, | |
2615 | struct ip_vs_service *svc, | |
2616 | struct netlink_callback *cb) | |
2617 | { | |
2618 | void *hdr; | |
2619 | ||
2620 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq, | |
2621 | &ip_vs_genl_family, NLM_F_MULTI, | |
2622 | IPVS_CMD_NEW_SERVICE); | |
2623 | if (!hdr) | |
2624 | return -EMSGSIZE; | |
2625 | ||
2626 | if (ip_vs_genl_fill_service(skb, svc) < 0) | |
2627 | goto nla_put_failure; | |
2628 | ||
2629 | return genlmsg_end(skb, hdr); | |
2630 | ||
2631 | nla_put_failure: | |
2632 | genlmsg_cancel(skb, hdr); | |
2633 | return -EMSGSIZE; | |
2634 | } | |
2635 | ||
2636 | static int ip_vs_genl_dump_services(struct sk_buff *skb, | |
2637 | struct netlink_callback *cb) | |
2638 | { | |
2639 | int idx = 0, i; | |
2640 | int start = cb->args[0]; | |
2641 | struct ip_vs_service *svc; | |
2642 | ||
2643 | mutex_lock(&__ip_vs_mutex); | |
2644 | for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) { | |
2645 | list_for_each_entry(svc, &ip_vs_svc_table[i], s_list) { | |
2646 | if (++idx <= start) | |
2647 | continue; | |
2648 | if (ip_vs_genl_dump_service(skb, svc, cb) < 0) { | |
2649 | idx--; | |
2650 | goto nla_put_failure; | |
2651 | } | |
2652 | } | |
2653 | } | |
2654 | ||
2655 | for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) { | |
2656 | list_for_each_entry(svc, &ip_vs_svc_fwm_table[i], f_list) { | |
2657 | if (++idx <= start) | |
2658 | continue; | |
2659 | if (ip_vs_genl_dump_service(skb, svc, cb) < 0) { | |
2660 | idx--; | |
2661 | goto nla_put_failure; | |
2662 | } | |
2663 | } | |
2664 | } | |
2665 | ||
2666 | nla_put_failure: | |
2667 | mutex_unlock(&__ip_vs_mutex); | |
2668 | cb->args[0] = idx; | |
2669 | ||
2670 | return skb->len; | |
2671 | } | |
2672 | ||
c860c6b1 | 2673 | static int ip_vs_genl_parse_service(struct ip_vs_service_user_kern *usvc, |
9a812198 JV |
2674 | struct nlattr *nla, int full_entry) |
2675 | { | |
2676 | struct nlattr *attrs[IPVS_SVC_ATTR_MAX + 1]; | |
2677 | struct nlattr *nla_af, *nla_port, *nla_fwmark, *nla_protocol, *nla_addr; | |
2678 | ||
2679 | /* Parse mandatory identifying service fields first */ | |
2680 | if (nla == NULL || | |
2681 | nla_parse_nested(attrs, IPVS_SVC_ATTR_MAX, nla, ip_vs_svc_policy)) | |
2682 | return -EINVAL; | |
2683 | ||
2684 | nla_af = attrs[IPVS_SVC_ATTR_AF]; | |
2685 | nla_protocol = attrs[IPVS_SVC_ATTR_PROTOCOL]; | |
2686 | nla_addr = attrs[IPVS_SVC_ATTR_ADDR]; | |
2687 | nla_port = attrs[IPVS_SVC_ATTR_PORT]; | |
2688 | nla_fwmark = attrs[IPVS_SVC_ATTR_FWMARK]; | |
2689 | ||
2690 | if (!(nla_af && (nla_fwmark || (nla_port && nla_protocol && nla_addr)))) | |
2691 | return -EINVAL; | |
2692 | ||
c860c6b1 | 2693 | usvc->af = nla_get_u16(nla_af); |
9a812198 JV |
2694 | /* For now, only support IPv4 */ |
2695 | if (nla_get_u16(nla_af) != AF_INET) | |
2696 | return -EAFNOSUPPORT; | |
2697 | ||
2698 | if (nla_fwmark) { | |
2699 | usvc->protocol = IPPROTO_TCP; | |
2700 | usvc->fwmark = nla_get_u32(nla_fwmark); | |
2701 | } else { | |
2702 | usvc->protocol = nla_get_u16(nla_protocol); | |
2703 | nla_memcpy(&usvc->addr, nla_addr, sizeof(usvc->addr)); | |
2704 | usvc->port = nla_get_u16(nla_port); | |
2705 | usvc->fwmark = 0; | |
2706 | } | |
2707 | ||
2708 | /* If a full entry was requested, check for the additional fields */ | |
2709 | if (full_entry) { | |
2710 | struct nlattr *nla_sched, *nla_flags, *nla_timeout, | |
2711 | *nla_netmask; | |
2712 | struct ip_vs_flags flags; | |
2713 | struct ip_vs_service *svc; | |
2714 | ||
2715 | nla_sched = attrs[IPVS_SVC_ATTR_SCHED_NAME]; | |
2716 | nla_flags = attrs[IPVS_SVC_ATTR_FLAGS]; | |
2717 | nla_timeout = attrs[IPVS_SVC_ATTR_TIMEOUT]; | |
2718 | nla_netmask = attrs[IPVS_SVC_ATTR_NETMASK]; | |
2719 | ||
2720 | if (!(nla_sched && nla_flags && nla_timeout && nla_netmask)) | |
2721 | return -EINVAL; | |
2722 | ||
2723 | nla_memcpy(&flags, nla_flags, sizeof(flags)); | |
2724 | ||
2725 | /* prefill flags from service if it already exists */ | |
2726 | if (usvc->fwmark) | |
b18610de | 2727 | svc = __ip_vs_svc_fwm_get(usvc->af, usvc->fwmark); |
9a812198 | 2728 | else |
b18610de JV |
2729 | svc = __ip_vs_service_get(usvc->af, usvc->protocol, |
2730 | &usvc->addr, usvc->port); | |
9a812198 JV |
2731 | if (svc) { |
2732 | usvc->flags = svc->flags; | |
2733 | ip_vs_service_put(svc); | |
2734 | } else | |
2735 | usvc->flags = 0; | |
2736 | ||
2737 | /* set new flags from userland */ | |
2738 | usvc->flags = (usvc->flags & ~flags.mask) | | |
2739 | (flags.flags & flags.mask); | |
c860c6b1 | 2740 | usvc->sched_name = nla_data(nla_sched); |
9a812198 JV |
2741 | usvc->timeout = nla_get_u32(nla_timeout); |
2742 | usvc->netmask = nla_get_u32(nla_netmask); | |
2743 | } | |
2744 | ||
2745 | return 0; | |
2746 | } | |
2747 | ||
2748 | static struct ip_vs_service *ip_vs_genl_find_service(struct nlattr *nla) | |
2749 | { | |
c860c6b1 | 2750 | struct ip_vs_service_user_kern usvc; |
9a812198 JV |
2751 | int ret; |
2752 | ||
2753 | ret = ip_vs_genl_parse_service(&usvc, nla, 0); | |
2754 | if (ret) | |
2755 | return ERR_PTR(ret); | |
2756 | ||
2757 | if (usvc.fwmark) | |
b18610de | 2758 | return __ip_vs_svc_fwm_get(usvc.af, usvc.fwmark); |
9a812198 | 2759 | else |
b18610de JV |
2760 | return __ip_vs_service_get(usvc.af, usvc.protocol, |
2761 | &usvc.addr, usvc.port); | |
9a812198 JV |
2762 | } |
2763 | ||
2764 | static int ip_vs_genl_fill_dest(struct sk_buff *skb, struct ip_vs_dest *dest) | |
2765 | { | |
2766 | struct nlattr *nl_dest; | |
2767 | ||
2768 | nl_dest = nla_nest_start(skb, IPVS_CMD_ATTR_DEST); | |
2769 | if (!nl_dest) | |
2770 | return -EMSGSIZE; | |
2771 | ||
2772 | NLA_PUT(skb, IPVS_DEST_ATTR_ADDR, sizeof(dest->addr), &dest->addr); | |
2773 | NLA_PUT_U16(skb, IPVS_DEST_ATTR_PORT, dest->port); | |
2774 | ||
2775 | NLA_PUT_U32(skb, IPVS_DEST_ATTR_FWD_METHOD, | |
2776 | atomic_read(&dest->conn_flags) & IP_VS_CONN_F_FWD_MASK); | |
2777 | NLA_PUT_U32(skb, IPVS_DEST_ATTR_WEIGHT, atomic_read(&dest->weight)); | |
2778 | NLA_PUT_U32(skb, IPVS_DEST_ATTR_U_THRESH, dest->u_threshold); | |
2779 | NLA_PUT_U32(skb, IPVS_DEST_ATTR_L_THRESH, dest->l_threshold); | |
2780 | NLA_PUT_U32(skb, IPVS_DEST_ATTR_ACTIVE_CONNS, | |
2781 | atomic_read(&dest->activeconns)); | |
2782 | NLA_PUT_U32(skb, IPVS_DEST_ATTR_INACT_CONNS, | |
2783 | atomic_read(&dest->inactconns)); | |
2784 | NLA_PUT_U32(skb, IPVS_DEST_ATTR_PERSIST_CONNS, | |
2785 | atomic_read(&dest->persistconns)); | |
2786 | ||
2787 | if (ip_vs_genl_fill_stats(skb, IPVS_DEST_ATTR_STATS, &dest->stats)) | |
2788 | goto nla_put_failure; | |
2789 | ||
2790 | nla_nest_end(skb, nl_dest); | |
2791 | ||
2792 | return 0; | |
2793 | ||
2794 | nla_put_failure: | |
2795 | nla_nest_cancel(skb, nl_dest); | |
2796 | return -EMSGSIZE; | |
2797 | } | |
2798 | ||
2799 | static int ip_vs_genl_dump_dest(struct sk_buff *skb, struct ip_vs_dest *dest, | |
2800 | struct netlink_callback *cb) | |
2801 | { | |
2802 | void *hdr; | |
2803 | ||
2804 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq, | |
2805 | &ip_vs_genl_family, NLM_F_MULTI, | |
2806 | IPVS_CMD_NEW_DEST); | |
2807 | if (!hdr) | |
2808 | return -EMSGSIZE; | |
2809 | ||
2810 | if (ip_vs_genl_fill_dest(skb, dest) < 0) | |
2811 | goto nla_put_failure; | |
2812 | ||
2813 | return genlmsg_end(skb, hdr); | |
2814 | ||
2815 | nla_put_failure: | |
2816 | genlmsg_cancel(skb, hdr); | |
2817 | return -EMSGSIZE; | |
2818 | } | |
2819 | ||
2820 | static int ip_vs_genl_dump_dests(struct sk_buff *skb, | |
2821 | struct netlink_callback *cb) | |
2822 | { | |
2823 | int idx = 0; | |
2824 | int start = cb->args[0]; | |
2825 | struct ip_vs_service *svc; | |
2826 | struct ip_vs_dest *dest; | |
2827 | struct nlattr *attrs[IPVS_CMD_ATTR_MAX + 1]; | |
2828 | ||
2829 | mutex_lock(&__ip_vs_mutex); | |
2830 | ||
2831 | /* Try to find the service for which to dump destinations */ | |
2832 | if (nlmsg_parse(cb->nlh, GENL_HDRLEN, attrs, | |
2833 | IPVS_CMD_ATTR_MAX, ip_vs_cmd_policy)) | |
2834 | goto out_err; | |
2835 | ||
2836 | svc = ip_vs_genl_find_service(attrs[IPVS_CMD_ATTR_SERVICE]); | |
2837 | if (IS_ERR(svc) || svc == NULL) | |
2838 | goto out_err; | |
2839 | ||
2840 | /* Dump the destinations */ | |
2841 | list_for_each_entry(dest, &svc->destinations, n_list) { | |
2842 | if (++idx <= start) | |
2843 | continue; | |
2844 | if (ip_vs_genl_dump_dest(skb, dest, cb) < 0) { | |
2845 | idx--; | |
2846 | goto nla_put_failure; | |
2847 | } | |
2848 | } | |
2849 | ||
2850 | nla_put_failure: | |
2851 | cb->args[0] = idx; | |
2852 | ip_vs_service_put(svc); | |
2853 | ||
2854 | out_err: | |
2855 | mutex_unlock(&__ip_vs_mutex); | |
2856 | ||
2857 | return skb->len; | |
2858 | } | |
2859 | ||
c860c6b1 | 2860 | static int ip_vs_genl_parse_dest(struct ip_vs_dest_user_kern *udest, |
9a812198 JV |
2861 | struct nlattr *nla, int full_entry) |
2862 | { | |
2863 | struct nlattr *attrs[IPVS_DEST_ATTR_MAX + 1]; | |
2864 | struct nlattr *nla_addr, *nla_port; | |
2865 | ||
2866 | /* Parse mandatory identifying destination fields first */ | |
2867 | if (nla == NULL || | |
2868 | nla_parse_nested(attrs, IPVS_DEST_ATTR_MAX, nla, ip_vs_dest_policy)) | |
2869 | return -EINVAL; | |
2870 | ||
2871 | nla_addr = attrs[IPVS_DEST_ATTR_ADDR]; | |
2872 | nla_port = attrs[IPVS_DEST_ATTR_PORT]; | |
2873 | ||
2874 | if (!(nla_addr && nla_port)) | |
2875 | return -EINVAL; | |
2876 | ||
2877 | nla_memcpy(&udest->addr, nla_addr, sizeof(udest->addr)); | |
2878 | udest->port = nla_get_u16(nla_port); | |
2879 | ||
2880 | /* If a full entry was requested, check for the additional fields */ | |
2881 | if (full_entry) { | |
2882 | struct nlattr *nla_fwd, *nla_weight, *nla_u_thresh, | |
2883 | *nla_l_thresh; | |
2884 | ||
2885 | nla_fwd = attrs[IPVS_DEST_ATTR_FWD_METHOD]; | |
2886 | nla_weight = attrs[IPVS_DEST_ATTR_WEIGHT]; | |
2887 | nla_u_thresh = attrs[IPVS_DEST_ATTR_U_THRESH]; | |
2888 | nla_l_thresh = attrs[IPVS_DEST_ATTR_L_THRESH]; | |
2889 | ||
2890 | if (!(nla_fwd && nla_weight && nla_u_thresh && nla_l_thresh)) | |
2891 | return -EINVAL; | |
2892 | ||
2893 | udest->conn_flags = nla_get_u32(nla_fwd) | |
2894 | & IP_VS_CONN_F_FWD_MASK; | |
2895 | udest->weight = nla_get_u32(nla_weight); | |
2896 | udest->u_threshold = nla_get_u32(nla_u_thresh); | |
2897 | udest->l_threshold = nla_get_u32(nla_l_thresh); | |
2898 | } | |
2899 | ||
2900 | return 0; | |
2901 | } | |
2902 | ||
2903 | static int ip_vs_genl_fill_daemon(struct sk_buff *skb, __be32 state, | |
2904 | const char *mcast_ifn, __be32 syncid) | |
2905 | { | |
2906 | struct nlattr *nl_daemon; | |
2907 | ||
2908 | nl_daemon = nla_nest_start(skb, IPVS_CMD_ATTR_DAEMON); | |
2909 | if (!nl_daemon) | |
2910 | return -EMSGSIZE; | |
2911 | ||
2912 | NLA_PUT_U32(skb, IPVS_DAEMON_ATTR_STATE, state); | |
2913 | NLA_PUT_STRING(skb, IPVS_DAEMON_ATTR_MCAST_IFN, mcast_ifn); | |
2914 | NLA_PUT_U32(skb, IPVS_DAEMON_ATTR_SYNC_ID, syncid); | |
2915 | ||
2916 | nla_nest_end(skb, nl_daemon); | |
2917 | ||
2918 | return 0; | |
2919 | ||
2920 | nla_put_failure: | |
2921 | nla_nest_cancel(skb, nl_daemon); | |
2922 | return -EMSGSIZE; | |
2923 | } | |
2924 | ||
2925 | static int ip_vs_genl_dump_daemon(struct sk_buff *skb, __be32 state, | |
2926 | const char *mcast_ifn, __be32 syncid, | |
2927 | struct netlink_callback *cb) | |
2928 | { | |
2929 | void *hdr; | |
2930 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq, | |
2931 | &ip_vs_genl_family, NLM_F_MULTI, | |
2932 | IPVS_CMD_NEW_DAEMON); | |
2933 | if (!hdr) | |
2934 | return -EMSGSIZE; | |
2935 | ||
2936 | if (ip_vs_genl_fill_daemon(skb, state, mcast_ifn, syncid)) | |
2937 | goto nla_put_failure; | |
2938 | ||
2939 | return genlmsg_end(skb, hdr); | |
2940 | ||
2941 | nla_put_failure: | |
2942 | genlmsg_cancel(skb, hdr); | |
2943 | return -EMSGSIZE; | |
2944 | } | |
2945 | ||
2946 | static int ip_vs_genl_dump_daemons(struct sk_buff *skb, | |
2947 | struct netlink_callback *cb) | |
2948 | { | |
2949 | mutex_lock(&__ip_vs_mutex); | |
2950 | if ((ip_vs_sync_state & IP_VS_STATE_MASTER) && !cb->args[0]) { | |
2951 | if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_MASTER, | |
2952 | ip_vs_master_mcast_ifn, | |
2953 | ip_vs_master_syncid, cb) < 0) | |
2954 | goto nla_put_failure; | |
2955 | ||
2956 | cb->args[0] = 1; | |
2957 | } | |
2958 | ||
2959 | if ((ip_vs_sync_state & IP_VS_STATE_BACKUP) && !cb->args[1]) { | |
2960 | if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_BACKUP, | |
2961 | ip_vs_backup_mcast_ifn, | |
2962 | ip_vs_backup_syncid, cb) < 0) | |
2963 | goto nla_put_failure; | |
2964 | ||
2965 | cb->args[1] = 1; | |
2966 | } | |
2967 | ||
2968 | nla_put_failure: | |
2969 | mutex_unlock(&__ip_vs_mutex); | |
2970 | ||
2971 | return skb->len; | |
2972 | } | |
2973 | ||
2974 | static int ip_vs_genl_new_daemon(struct nlattr **attrs) | |
2975 | { | |
2976 | if (!(attrs[IPVS_DAEMON_ATTR_STATE] && | |
2977 | attrs[IPVS_DAEMON_ATTR_MCAST_IFN] && | |
2978 | attrs[IPVS_DAEMON_ATTR_SYNC_ID])) | |
2979 | return -EINVAL; | |
2980 | ||
2981 | return start_sync_thread(nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]), | |
2982 | nla_data(attrs[IPVS_DAEMON_ATTR_MCAST_IFN]), | |
2983 | nla_get_u32(attrs[IPVS_DAEMON_ATTR_SYNC_ID])); | |
2984 | } | |
2985 | ||
2986 | static int ip_vs_genl_del_daemon(struct nlattr **attrs) | |
2987 | { | |
2988 | if (!attrs[IPVS_DAEMON_ATTR_STATE]) | |
2989 | return -EINVAL; | |
2990 | ||
2991 | return stop_sync_thread(nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE])); | |
2992 | } | |
2993 | ||
2994 | static int ip_vs_genl_set_config(struct nlattr **attrs) | |
2995 | { | |
2996 | struct ip_vs_timeout_user t; | |
2997 | ||
2998 | __ip_vs_get_timeouts(&t); | |
2999 | ||
3000 | if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP]) | |
3001 | t.tcp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP]); | |
3002 | ||
3003 | if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN]) | |
3004 | t.tcp_fin_timeout = | |
3005 | nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN]); | |
3006 | ||
3007 | if (attrs[IPVS_CMD_ATTR_TIMEOUT_UDP]) | |
3008 | t.udp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_UDP]); | |
3009 | ||
3010 | return ip_vs_set_timeout(&t); | |
3011 | } | |
3012 | ||
3013 | static int ip_vs_genl_set_cmd(struct sk_buff *skb, struct genl_info *info) | |
3014 | { | |
3015 | struct ip_vs_service *svc = NULL; | |
c860c6b1 JV |
3016 | struct ip_vs_service_user_kern usvc; |
3017 | struct ip_vs_dest_user_kern udest; | |
9a812198 JV |
3018 | int ret = 0, cmd; |
3019 | int need_full_svc = 0, need_full_dest = 0; | |
3020 | ||
3021 | cmd = info->genlhdr->cmd; | |
3022 | ||
3023 | mutex_lock(&__ip_vs_mutex); | |
3024 | ||
3025 | if (cmd == IPVS_CMD_FLUSH) { | |
3026 | ret = ip_vs_flush(); | |
3027 | goto out; | |
3028 | } else if (cmd == IPVS_CMD_SET_CONFIG) { | |
3029 | ret = ip_vs_genl_set_config(info->attrs); | |
3030 | goto out; | |
3031 | } else if (cmd == IPVS_CMD_NEW_DAEMON || | |
3032 | cmd == IPVS_CMD_DEL_DAEMON) { | |
3033 | ||
3034 | struct nlattr *daemon_attrs[IPVS_DAEMON_ATTR_MAX + 1]; | |
3035 | ||
3036 | if (!info->attrs[IPVS_CMD_ATTR_DAEMON] || | |
3037 | nla_parse_nested(daemon_attrs, IPVS_DAEMON_ATTR_MAX, | |
3038 | info->attrs[IPVS_CMD_ATTR_DAEMON], | |
3039 | ip_vs_daemon_policy)) { | |
3040 | ret = -EINVAL; | |
3041 | goto out; | |
3042 | } | |
3043 | ||
3044 | if (cmd == IPVS_CMD_NEW_DAEMON) | |
3045 | ret = ip_vs_genl_new_daemon(daemon_attrs); | |
3046 | else | |
3047 | ret = ip_vs_genl_del_daemon(daemon_attrs); | |
3048 | goto out; | |
3049 | } else if (cmd == IPVS_CMD_ZERO && | |
3050 | !info->attrs[IPVS_CMD_ATTR_SERVICE]) { | |
3051 | ret = ip_vs_zero_all(); | |
3052 | goto out; | |
3053 | } | |
3054 | ||
3055 | /* All following commands require a service argument, so check if we | |
3056 | * received a valid one. We need a full service specification when | |
3057 | * adding / editing a service. Only identifying members otherwise. */ | |
3058 | if (cmd == IPVS_CMD_NEW_SERVICE || cmd == IPVS_CMD_SET_SERVICE) | |
3059 | need_full_svc = 1; | |
3060 | ||
3061 | ret = ip_vs_genl_parse_service(&usvc, | |
3062 | info->attrs[IPVS_CMD_ATTR_SERVICE], | |
3063 | need_full_svc); | |
3064 | if (ret) | |
3065 | goto out; | |
3066 | ||
3067 | /* Lookup the exact service by <protocol, addr, port> or fwmark */ | |
3068 | if (usvc.fwmark == 0) | |
b18610de JV |
3069 | svc = __ip_vs_service_get(usvc.af, usvc.protocol, |
3070 | &usvc.addr, usvc.port); | |
9a812198 | 3071 | else |
b18610de | 3072 | svc = __ip_vs_svc_fwm_get(usvc.af, usvc.fwmark); |
9a812198 JV |
3073 | |
3074 | /* Unless we're adding a new service, the service must already exist */ | |
3075 | if ((cmd != IPVS_CMD_NEW_SERVICE) && (svc == NULL)) { | |
3076 | ret = -ESRCH; | |
3077 | goto out; | |
3078 | } | |
3079 | ||
3080 | /* Destination commands require a valid destination argument. For | |
3081 | * adding / editing a destination, we need a full destination | |
3082 | * specification. */ | |
3083 | if (cmd == IPVS_CMD_NEW_DEST || cmd == IPVS_CMD_SET_DEST || | |
3084 | cmd == IPVS_CMD_DEL_DEST) { | |
3085 | if (cmd != IPVS_CMD_DEL_DEST) | |
3086 | need_full_dest = 1; | |
3087 | ||
3088 | ret = ip_vs_genl_parse_dest(&udest, | |
3089 | info->attrs[IPVS_CMD_ATTR_DEST], | |
3090 | need_full_dest); | |
3091 | if (ret) | |
3092 | goto out; | |
3093 | } | |
3094 | ||
3095 | switch (cmd) { | |
3096 | case IPVS_CMD_NEW_SERVICE: | |
3097 | if (svc == NULL) | |
3098 | ret = ip_vs_add_service(&usvc, &svc); | |
3099 | else | |
3100 | ret = -EEXIST; | |
3101 | break; | |
3102 | case IPVS_CMD_SET_SERVICE: | |
3103 | ret = ip_vs_edit_service(svc, &usvc); | |
3104 | break; | |
3105 | case IPVS_CMD_DEL_SERVICE: | |
3106 | ret = ip_vs_del_service(svc); | |
3107 | break; | |
3108 | case IPVS_CMD_NEW_DEST: | |
3109 | ret = ip_vs_add_dest(svc, &udest); | |
3110 | break; | |
3111 | case IPVS_CMD_SET_DEST: | |
3112 | ret = ip_vs_edit_dest(svc, &udest); | |
3113 | break; | |
3114 | case IPVS_CMD_DEL_DEST: | |
3115 | ret = ip_vs_del_dest(svc, &udest); | |
3116 | break; | |
3117 | case IPVS_CMD_ZERO: | |
3118 | ret = ip_vs_zero_service(svc); | |
3119 | break; | |
3120 | default: | |
3121 | ret = -EINVAL; | |
3122 | } | |
3123 | ||
3124 | out: | |
3125 | if (svc) | |
3126 | ip_vs_service_put(svc); | |
3127 | mutex_unlock(&__ip_vs_mutex); | |
3128 | ||
3129 | return ret; | |
3130 | } | |
3131 | ||
3132 | static int ip_vs_genl_get_cmd(struct sk_buff *skb, struct genl_info *info) | |
3133 | { | |
3134 | struct sk_buff *msg; | |
3135 | void *reply; | |
3136 | int ret, cmd, reply_cmd; | |
3137 | ||
3138 | cmd = info->genlhdr->cmd; | |
3139 | ||
3140 | if (cmd == IPVS_CMD_GET_SERVICE) | |
3141 | reply_cmd = IPVS_CMD_NEW_SERVICE; | |
3142 | else if (cmd == IPVS_CMD_GET_INFO) | |
3143 | reply_cmd = IPVS_CMD_SET_INFO; | |
3144 | else if (cmd == IPVS_CMD_GET_CONFIG) | |
3145 | reply_cmd = IPVS_CMD_SET_CONFIG; | |
3146 | else { | |
3147 | IP_VS_ERR("unknown Generic Netlink command\n"); | |
3148 | return -EINVAL; | |
3149 | } | |
3150 | ||
3151 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
3152 | if (!msg) | |
3153 | return -ENOMEM; | |
3154 | ||
3155 | mutex_lock(&__ip_vs_mutex); | |
3156 | ||
3157 | reply = genlmsg_put_reply(msg, info, &ip_vs_genl_family, 0, reply_cmd); | |
3158 | if (reply == NULL) | |
3159 | goto nla_put_failure; | |
3160 | ||
3161 | switch (cmd) { | |
3162 | case IPVS_CMD_GET_SERVICE: | |
3163 | { | |
3164 | struct ip_vs_service *svc; | |
3165 | ||
3166 | svc = ip_vs_genl_find_service(info->attrs[IPVS_CMD_ATTR_SERVICE]); | |
3167 | if (IS_ERR(svc)) { | |
3168 | ret = PTR_ERR(svc); | |
3169 | goto out_err; | |
3170 | } else if (svc) { | |
3171 | ret = ip_vs_genl_fill_service(msg, svc); | |
3172 | ip_vs_service_put(svc); | |
3173 | if (ret) | |
3174 | goto nla_put_failure; | |
3175 | } else { | |
3176 | ret = -ESRCH; | |
3177 | goto out_err; | |
3178 | } | |
3179 | ||
3180 | break; | |
3181 | } | |
3182 | ||
3183 | case IPVS_CMD_GET_CONFIG: | |
3184 | { | |
3185 | struct ip_vs_timeout_user t; | |
3186 | ||
3187 | __ip_vs_get_timeouts(&t); | |
3188 | #ifdef CONFIG_IP_VS_PROTO_TCP | |
3189 | NLA_PUT_U32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP, t.tcp_timeout); | |
3190 | NLA_PUT_U32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP_FIN, | |
3191 | t.tcp_fin_timeout); | |
3192 | #endif | |
3193 | #ifdef CONFIG_IP_VS_PROTO_UDP | |
3194 | NLA_PUT_U32(msg, IPVS_CMD_ATTR_TIMEOUT_UDP, t.udp_timeout); | |
3195 | #endif | |
3196 | ||
3197 | break; | |
3198 | } | |
3199 | ||
3200 | case IPVS_CMD_GET_INFO: | |
3201 | NLA_PUT_U32(msg, IPVS_INFO_ATTR_VERSION, IP_VS_VERSION_CODE); | |
3202 | NLA_PUT_U32(msg, IPVS_INFO_ATTR_CONN_TAB_SIZE, | |
3203 | IP_VS_CONN_TAB_SIZE); | |
3204 | break; | |
3205 | } | |
3206 | ||
3207 | genlmsg_end(msg, reply); | |
3208 | ret = genlmsg_unicast(msg, info->snd_pid); | |
3209 | goto out; | |
3210 | ||
3211 | nla_put_failure: | |
3212 | IP_VS_ERR("not enough space in Netlink message\n"); | |
3213 | ret = -EMSGSIZE; | |
3214 | ||
3215 | out_err: | |
3216 | nlmsg_free(msg); | |
3217 | out: | |
3218 | mutex_unlock(&__ip_vs_mutex); | |
3219 | ||
3220 | return ret; | |
3221 | } | |
3222 | ||
3223 | ||
3224 | static struct genl_ops ip_vs_genl_ops[] __read_mostly = { | |
3225 | { | |
3226 | .cmd = IPVS_CMD_NEW_SERVICE, | |
3227 | .flags = GENL_ADMIN_PERM, | |
3228 | .policy = ip_vs_cmd_policy, | |
3229 | .doit = ip_vs_genl_set_cmd, | |
3230 | }, | |
3231 | { | |
3232 | .cmd = IPVS_CMD_SET_SERVICE, | |
3233 | .flags = GENL_ADMIN_PERM, | |
3234 | .policy = ip_vs_cmd_policy, | |
3235 | .doit = ip_vs_genl_set_cmd, | |
3236 | }, | |
3237 | { | |
3238 | .cmd = IPVS_CMD_DEL_SERVICE, | |
3239 | .flags = GENL_ADMIN_PERM, | |
3240 | .policy = ip_vs_cmd_policy, | |
3241 | .doit = ip_vs_genl_set_cmd, | |
3242 | }, | |
3243 | { | |
3244 | .cmd = IPVS_CMD_GET_SERVICE, | |
3245 | .flags = GENL_ADMIN_PERM, | |
3246 | .doit = ip_vs_genl_get_cmd, | |
3247 | .dumpit = ip_vs_genl_dump_services, | |
3248 | .policy = ip_vs_cmd_policy, | |
3249 | }, | |
3250 | { | |
3251 | .cmd = IPVS_CMD_NEW_DEST, | |
3252 | .flags = GENL_ADMIN_PERM, | |
3253 | .policy = ip_vs_cmd_policy, | |
3254 | .doit = ip_vs_genl_set_cmd, | |
3255 | }, | |
3256 | { | |
3257 | .cmd = IPVS_CMD_SET_DEST, | |
3258 | .flags = GENL_ADMIN_PERM, | |
3259 | .policy = ip_vs_cmd_policy, | |
3260 | .doit = ip_vs_genl_set_cmd, | |
3261 | }, | |
3262 | { | |
3263 | .cmd = IPVS_CMD_DEL_DEST, | |
3264 | .flags = GENL_ADMIN_PERM, | |
3265 | .policy = ip_vs_cmd_policy, | |
3266 | .doit = ip_vs_genl_set_cmd, | |
3267 | }, | |
3268 | { | |
3269 | .cmd = IPVS_CMD_GET_DEST, | |
3270 | .flags = GENL_ADMIN_PERM, | |
3271 | .policy = ip_vs_cmd_policy, | |
3272 | .dumpit = ip_vs_genl_dump_dests, | |
3273 | }, | |
3274 | { | |
3275 | .cmd = IPVS_CMD_NEW_DAEMON, | |
3276 | .flags = GENL_ADMIN_PERM, | |
3277 | .policy = ip_vs_cmd_policy, | |
3278 | .doit = ip_vs_genl_set_cmd, | |
3279 | }, | |
3280 | { | |
3281 | .cmd = IPVS_CMD_DEL_DAEMON, | |
3282 | .flags = GENL_ADMIN_PERM, | |
3283 | .policy = ip_vs_cmd_policy, | |
3284 | .doit = ip_vs_genl_set_cmd, | |
3285 | }, | |
3286 | { | |
3287 | .cmd = IPVS_CMD_GET_DAEMON, | |
3288 | .flags = GENL_ADMIN_PERM, | |
3289 | .dumpit = ip_vs_genl_dump_daemons, | |
3290 | }, | |
3291 | { | |
3292 | .cmd = IPVS_CMD_SET_CONFIG, | |
3293 | .flags = GENL_ADMIN_PERM, | |
3294 | .policy = ip_vs_cmd_policy, | |
3295 | .doit = ip_vs_genl_set_cmd, | |
3296 | }, | |
3297 | { | |
3298 | .cmd = IPVS_CMD_GET_CONFIG, | |
3299 | .flags = GENL_ADMIN_PERM, | |
3300 | .doit = ip_vs_genl_get_cmd, | |
3301 | }, | |
3302 | { | |
3303 | .cmd = IPVS_CMD_GET_INFO, | |
3304 | .flags = GENL_ADMIN_PERM, | |
3305 | .doit = ip_vs_genl_get_cmd, | |
3306 | }, | |
3307 | { | |
3308 | .cmd = IPVS_CMD_ZERO, | |
3309 | .flags = GENL_ADMIN_PERM, | |
3310 | .policy = ip_vs_cmd_policy, | |
3311 | .doit = ip_vs_genl_set_cmd, | |
3312 | }, | |
3313 | { | |
3314 | .cmd = IPVS_CMD_FLUSH, | |
3315 | .flags = GENL_ADMIN_PERM, | |
3316 | .doit = ip_vs_genl_set_cmd, | |
3317 | }, | |
3318 | }; | |
3319 | ||
3320 | static int __init ip_vs_genl_register(void) | |
3321 | { | |
3322 | int ret, i; | |
3323 | ||
3324 | ret = genl_register_family(&ip_vs_genl_family); | |
3325 | if (ret) | |
3326 | return ret; | |
3327 | ||
3328 | for (i = 0; i < ARRAY_SIZE(ip_vs_genl_ops); i++) { | |
3329 | ret = genl_register_ops(&ip_vs_genl_family, &ip_vs_genl_ops[i]); | |
3330 | if (ret) | |
3331 | goto err_out; | |
3332 | } | |
3333 | return 0; | |
3334 | ||
3335 | err_out: | |
3336 | genl_unregister_family(&ip_vs_genl_family); | |
3337 | return ret; | |
3338 | } | |
3339 | ||
3340 | static void ip_vs_genl_unregister(void) | |
3341 | { | |
3342 | genl_unregister_family(&ip_vs_genl_family); | |
3343 | } | |
3344 | ||
3345 | /* End of Generic Netlink interface definitions */ | |
3346 | ||
1da177e4 | 3347 | |
048cf48b | 3348 | int __init ip_vs_control_init(void) |
1da177e4 LT |
3349 | { |
3350 | int ret; | |
3351 | int idx; | |
3352 | ||
3353 | EnterFunction(2); | |
3354 | ||
3355 | ret = nf_register_sockopt(&ip_vs_sockopts); | |
3356 | if (ret) { | |
3357 | IP_VS_ERR("cannot register sockopt.\n"); | |
3358 | return ret; | |
3359 | } | |
3360 | ||
9a812198 JV |
3361 | ret = ip_vs_genl_register(); |
3362 | if (ret) { | |
3363 | IP_VS_ERR("cannot register Generic Netlink interface.\n"); | |
3364 | nf_unregister_sockopt(&ip_vs_sockopts); | |
3365 | return ret; | |
3366 | } | |
3367 | ||
457c4cbc EB |
3368 | proc_net_fops_create(&init_net, "ip_vs", 0, &ip_vs_info_fops); |
3369 | proc_net_fops_create(&init_net, "ip_vs_stats",0, &ip_vs_stats_fops); | |
1da177e4 | 3370 | |
90754f8e | 3371 | sysctl_header = register_sysctl_paths(net_vs_ctl_path, vs_vars); |
1da177e4 LT |
3372 | |
3373 | /* Initialize ip_vs_svc_table, ip_vs_svc_fwm_table, ip_vs_rtable */ | |
3374 | for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
3375 | INIT_LIST_HEAD(&ip_vs_svc_table[idx]); | |
3376 | INIT_LIST_HEAD(&ip_vs_svc_fwm_table[idx]); | |
3377 | } | |
3378 | for(idx = 0; idx < IP_VS_RTAB_SIZE; idx++) { | |
3379 | INIT_LIST_HEAD(&ip_vs_rtable[idx]); | |
3380 | } | |
3381 | ||
1da177e4 LT |
3382 | ip_vs_new_estimator(&ip_vs_stats); |
3383 | ||
3384 | /* Hook the defense timer */ | |
3385 | schedule_delayed_work(&defense_work, DEFENSE_TIMER_PERIOD); | |
3386 | ||
3387 | LeaveFunction(2); | |
3388 | return 0; | |
3389 | } | |
3390 | ||
3391 | ||
3392 | void ip_vs_control_cleanup(void) | |
3393 | { | |
3394 | EnterFunction(2); | |
3395 | ip_vs_trash_cleanup(); | |
3396 | cancel_rearming_delayed_work(&defense_work); | |
28e53bdd | 3397 | cancel_work_sync(&defense_work.work); |
1da177e4 LT |
3398 | ip_vs_kill_estimator(&ip_vs_stats); |
3399 | unregister_sysctl_table(sysctl_header); | |
457c4cbc EB |
3400 | proc_net_remove(&init_net, "ip_vs_stats"); |
3401 | proc_net_remove(&init_net, "ip_vs"); | |
9a812198 | 3402 | ip_vs_genl_unregister(); |
1da177e4 LT |
3403 | nf_unregister_sockopt(&ip_vs_sockopts); |
3404 | LeaveFunction(2); | |
3405 | } |