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airo: copying wrong data in airo_get_aplist()
[linux-2.6/btrfs-unstable.git] / net / netfilter / ipvs / ip_vs_ctl.c
blobdd811b8dd97c66a9da387a4e37073c47e8dc4407
1 /*
2 * IPVS An implementation of the IP virtual server support for the
3 * LINUX operating system. IPVS is now implemented as a module
4 * over the NetFilter framework. IPVS can be used to build a
5 * high-performance and highly available server based on a
6 * cluster of servers.
7 *
8 * 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 #define KMSG_COMPONENT "IPVS"
22 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
23
24 #include <linux/module.h>
25 #include <linux/init.h>
26 #include <linux/types.h>
27 #include <linux/capability.h>
28 #include <linux/fs.h>
29 #include <linux/sysctl.h>
30 #include <linux/proc_fs.h>
31 #include <linux/workqueue.h>
32 #include <linux/swap.h>
33 #include <linux/seq_file.h>
34 #include <linux/slab.h>
35
36 #include <linux/netfilter.h>
37 #include <linux/netfilter_ipv4.h>
38 #include <linux/mutex.h>
39
40 #include <net/net_namespace.h>
41 #include <linux/nsproxy.h>
42 #include <net/ip.h>
43 #ifdef CONFIG_IP_VS_IPV6
44 #include <net/ipv6.h>
45 #include <net/ip6_route.h>
46 #endif
47 #include <net/route.h>
48 #include <net/sock.h>
49 #include <net/genetlink.h>
50
51 #include <asm/uaccess.h>
52
53 #include <net/ip_vs.h>
54
55 /* semaphore for IPVS sockopts. And, [gs]etsockopt may sleep. */
56 static DEFINE_MUTEX(__ip_vs_mutex);
57
58 /* lock for service table */
59 static DEFINE_RWLOCK(__ip_vs_svc_lock);
60
61 /* sysctl variables */
62
63 #ifdef CONFIG_IP_VS_DEBUG
64 static int sysctl_ip_vs_debug_level = 0;
65
66 int ip_vs_get_debug_level(void)
67 {
68 return sysctl_ip_vs_debug_level;
69 }
70 #endif
71
72
73 /* Protos */
74 static void __ip_vs_del_service(struct ip_vs_service *svc);
75
76
77 #ifdef CONFIG_IP_VS_IPV6
78 /* Taken from rt6_fill_node() in net/ipv6/route.c, is there a better way? */
79 static int __ip_vs_addr_is_local_v6(struct net *net,
80 const struct in6_addr *addr)
81 {
82 struct rt6_info *rt;
83 struct flowi6 fl6 = {
84 .daddr = *addr,
85 };
86
87 rt = (struct rt6_info *)ip6_route_output(net, NULL, &fl6);
88 if (rt && rt->dst.dev && (rt->dst.dev->flags & IFF_LOOPBACK))
89 return 1;
90
91 return 0;
92 }
93 #endif
94
95 #ifdef CONFIG_SYSCTL
96 /*
97 * update_defense_level is called from keventd and from sysctl,
98 * so it needs to protect itself from softirqs
99 */
100 static void update_defense_level(struct netns_ipvs *ipvs)
101 {
102 struct sysinfo i;
103 static int old_secure_tcp = 0;
104 int availmem;
105 int nomem;
106 int to_change = -1;
107
108 /* we only count free and buffered memory (in pages) */
109 si_meminfo(&i);
110 availmem = i.freeram + i.bufferram;
111 /* however in linux 2.5 the i.bufferram is total page cache size,
112 we need adjust it */
113 /* si_swapinfo(&i); */
114 /* availmem = availmem - (i.totalswap - i.freeswap); */
115
116 nomem = (availmem < ipvs->sysctl_amemthresh);
117
118 local_bh_disable();
119
120 /* drop_entry */
121 spin_lock(&ipvs->dropentry_lock);
122 switch (ipvs->sysctl_drop_entry) {
123 case 0:
124 atomic_set(&ipvs->dropentry, 0);
125 break;
126 case 1:
127 if (nomem) {
128 atomic_set(&ipvs->dropentry, 1);
129 ipvs->sysctl_drop_entry = 2;
130 } else {
131 atomic_set(&ipvs->dropentry, 0);
132 }
133 break;
134 case 2:
135 if (nomem) {
136 atomic_set(&ipvs->dropentry, 1);
137 } else {
138 atomic_set(&ipvs->dropentry, 0);
139 ipvs->sysctl_drop_entry = 1;
140 };
141 break;
142 case 3:
143 atomic_set(&ipvs->dropentry, 1);
144 break;
145 }
146 spin_unlock(&ipvs->dropentry_lock);
147
148 /* drop_packet */
149 spin_lock(&ipvs->droppacket_lock);
150 switch (ipvs->sysctl_drop_packet) {
151 case 0:
152 ipvs->drop_rate = 0;
153 break;
154 case 1:
155 if (nomem) {
156 ipvs->drop_rate = ipvs->drop_counter
157 = ipvs->sysctl_amemthresh /
158 (ipvs->sysctl_amemthresh-availmem);
159 ipvs->sysctl_drop_packet = 2;
160 } else {
161 ipvs->drop_rate = 0;
162 }
163 break;
164 case 2:
165 if (nomem) {
166 ipvs->drop_rate = ipvs->drop_counter
167 = ipvs->sysctl_amemthresh /
168 (ipvs->sysctl_amemthresh-availmem);
169 } else {
170 ipvs->drop_rate = 0;
171 ipvs->sysctl_drop_packet = 1;
172 }
173 break;
174 case 3:
175 ipvs->drop_rate = ipvs->sysctl_am_droprate;
176 break;
177 }
178 spin_unlock(&ipvs->droppacket_lock);
179
180 /* secure_tcp */
181 spin_lock(&ipvs->securetcp_lock);
182 switch (ipvs->sysctl_secure_tcp) {
183 case 0:
184 if (old_secure_tcp >= 2)
185 to_change = 0;
186 break;
187 case 1:
188 if (nomem) {
189 if (old_secure_tcp < 2)
190 to_change = 1;
191 ipvs->sysctl_secure_tcp = 2;
192 } else {
193 if (old_secure_tcp >= 2)
194 to_change = 0;
195 }
196 break;
197 case 2:
198 if (nomem) {
199 if (old_secure_tcp < 2)
200 to_change = 1;
201 } else {
202 if (old_secure_tcp >= 2)
203 to_change = 0;
204 ipvs->sysctl_secure_tcp = 1;
205 }
206 break;
207 case 3:
208 if (old_secure_tcp < 2)
209 to_change = 1;
210 break;
211 }
212 old_secure_tcp = ipvs->sysctl_secure_tcp;
213 if (to_change >= 0)
214 ip_vs_protocol_timeout_change(ipvs,
215 ipvs->sysctl_secure_tcp > 1);
216 spin_unlock(&ipvs->securetcp_lock);
217
218 local_bh_enable();
219 }
220
221
222 /*
223 * Timer for checking the defense
224 */
225 #define DEFENSE_TIMER_PERIOD 1*HZ
226
227 static void defense_work_handler(struct work_struct *work)
228 {
229 struct netns_ipvs *ipvs =
230 container_of(work, struct netns_ipvs, defense_work.work);
231
232 update_defense_level(ipvs);
233 if (atomic_read(&ipvs->dropentry))
234 ip_vs_random_dropentry(ipvs->net);
235 schedule_delayed_work(&ipvs->defense_work, DEFENSE_TIMER_PERIOD);
236 }
237 #endif
238
239 int
240 ip_vs_use_count_inc(void)
241 {
242 return try_module_get(THIS_MODULE);
243 }
244
245 void
246 ip_vs_use_count_dec(void)
247 {
248 module_put(THIS_MODULE);
249 }
250
251
252 /*
253 * Hash table: for virtual service lookups
254 */
255 #define IP_VS_SVC_TAB_BITS 8
256 #define IP_VS_SVC_TAB_SIZE (1 << IP_VS_SVC_TAB_BITS)
257 #define IP_VS_SVC_TAB_MASK (IP_VS_SVC_TAB_SIZE - 1)
258
259 /* the service table hashed by <protocol, addr, port> */
260 static struct list_head ip_vs_svc_table[IP_VS_SVC_TAB_SIZE];
261 /* the service table hashed by fwmark */
262 static struct list_head ip_vs_svc_fwm_table[IP_VS_SVC_TAB_SIZE];
263
264
265 /*
266 * Returns hash value for virtual service
267 */
268 static inline unsigned int
269 ip_vs_svc_hashkey(struct net *net, int af, unsigned int proto,
270 const union nf_inet_addr *addr, __be16 port)
271 {
272 register unsigned int porth = ntohs(port);
273 __be32 addr_fold = addr->ip;
274
275 #ifdef CONFIG_IP_VS_IPV6
276 if (af == AF_INET6)
277 addr_fold = addr->ip6[0]^addr->ip6[1]^
278 addr->ip6[2]^addr->ip6[3];
279 #endif
280 addr_fold ^= ((size_t)net>>8);
281
282 return (proto^ntohl(addr_fold)^(porth>>IP_VS_SVC_TAB_BITS)^porth)
283 & IP_VS_SVC_TAB_MASK;
284 }
285
286 /*
287 * Returns hash value of fwmark for virtual service lookup
288 */
289 static inline unsigned int ip_vs_svc_fwm_hashkey(struct net *net, __u32 fwmark)
290 {
291 return (((size_t)net>>8) ^ fwmark) & IP_VS_SVC_TAB_MASK;
292 }
293
294 /*
295 * Hashes a service in the ip_vs_svc_table by <netns,proto,addr,port>
296 * or in the ip_vs_svc_fwm_table by fwmark.
297 * Should be called with locked tables.
298 */
299 static int ip_vs_svc_hash(struct ip_vs_service *svc)
300 {
301 unsigned int hash;
302
303 if (svc->flags & IP_VS_SVC_F_HASHED) {
304 pr_err("%s(): request for already hashed, called from %pF\n",
305 __func__, __builtin_return_address(0));
306 return 0;
307 }
308
309 if (svc->fwmark == 0) {
310 /*
311 * Hash it by <netns,protocol,addr,port> in ip_vs_svc_table
312 */
313 hash = ip_vs_svc_hashkey(svc->net, svc->af, svc->protocol,
314 &svc->addr, svc->port);
315 list_add(&svc->s_list, &ip_vs_svc_table[hash]);
316 } else {
317 /*
318 * Hash it by fwmark in svc_fwm_table
319 */
320 hash = ip_vs_svc_fwm_hashkey(svc->net, svc->fwmark);
321 list_add(&svc->f_list, &ip_vs_svc_fwm_table[hash]);
322 }
323
324 svc->flags |= IP_VS_SVC_F_HASHED;
325 /* increase its refcnt because it is referenced by the svc table */
326 atomic_inc(&svc->refcnt);
327 return 1;
328 }
329
330
331 /*
332 * Unhashes a service from svc_table / svc_fwm_table.
333 * Should be called with locked tables.
334 */
335 static int ip_vs_svc_unhash(struct ip_vs_service *svc)
336 {
337 if (!(svc->flags & IP_VS_SVC_F_HASHED)) {
338 pr_err("%s(): request for unhash flagged, called from %pF\n",
339 __func__, __builtin_return_address(0));
340 return 0;
341 }
342
343 if (svc->fwmark == 0) {
344 /* Remove it from the svc_table table */
345 list_del(&svc->s_list);
346 } else {
347 /* Remove it from the svc_fwm_table table */
348 list_del(&svc->f_list);
349 }
350
351 svc->flags &= ~IP_VS_SVC_F_HASHED;
352 atomic_dec(&svc->refcnt);
353 return 1;
354 }
355
356
357 /*
358 * Get service by {netns, proto,addr,port} in the service table.
359 */
360 static inline struct ip_vs_service *
361 __ip_vs_service_find(struct net *net, int af, __u16 protocol,
362 const union nf_inet_addr *vaddr, __be16 vport)
363 {
364 unsigned int hash;
365 struct ip_vs_service *svc;
366
367 /* Check for "full" addressed entries */
368 hash = ip_vs_svc_hashkey(net, af, protocol, vaddr, vport);
369
370 list_for_each_entry(svc, &ip_vs_svc_table[hash], s_list){
371 if ((svc->af == af)
372 && ip_vs_addr_equal(af, &svc->addr, vaddr)
373 && (svc->port == vport)
374 && (svc->protocol == protocol)
375 && net_eq(svc->net, net)) {
376 /* HIT */
377 return svc;
378 }
379 }
380
381 return NULL;
382 }
383
384
385 /*
386 * Get service by {fwmark} in the service table.
387 */
388 static inline struct ip_vs_service *
389 __ip_vs_svc_fwm_find(struct net *net, int af, __u32 fwmark)
390 {
391 unsigned int hash;
392 struct ip_vs_service *svc;
393
394 /* Check for fwmark addressed entries */
395 hash = ip_vs_svc_fwm_hashkey(net, fwmark);
396
397 list_for_each_entry(svc, &ip_vs_svc_fwm_table[hash], f_list) {
398 if (svc->fwmark == fwmark && svc->af == af
399 && net_eq(svc->net, net)) {
400 /* HIT */
401 return svc;
402 }
403 }
404
405 return NULL;
406 }
407
408 struct ip_vs_service *
409 ip_vs_service_get(struct net *net, int af, __u32 fwmark, __u16 protocol,
410 const union nf_inet_addr *vaddr, __be16 vport)
411 {
412 struct ip_vs_service *svc;
413 struct netns_ipvs *ipvs = net_ipvs(net);
414
415 read_lock(&__ip_vs_svc_lock);
416
417 /*
418 * Check the table hashed by fwmark first
419 */
420 if (fwmark) {
421 svc = __ip_vs_svc_fwm_find(net, af, fwmark);
422 if (svc)
423 goto out;
424 }
425
426 /*
427 * Check the table hashed by <protocol,addr,port>
428 * for "full" addressed entries
429 */
430 svc = __ip_vs_service_find(net, af, protocol, vaddr, vport);
431
432 if (svc == NULL
433 && protocol == IPPROTO_TCP
434 && atomic_read(&ipvs->ftpsvc_counter)
435 && (vport == FTPDATA || ntohs(vport) >= PROT_SOCK)) {
436 /*
437 * Check if ftp service entry exists, the packet
438 * might belong to FTP data connections.
439 */
440 svc = __ip_vs_service_find(net, af, protocol, vaddr, FTPPORT);
441 }
442
443 if (svc == NULL
444 && atomic_read(&ipvs->nullsvc_counter)) {
445 /*
446 * Check if the catch-all port (port zero) exists
447 */
448 svc = __ip_vs_service_find(net, af, protocol, vaddr, 0);
449 }
450
451 out:
452 if (svc)
453 atomic_inc(&svc->usecnt);
454 read_unlock(&__ip_vs_svc_lock);
455
456 IP_VS_DBG_BUF(9, "lookup service: fwm %u %s %s:%u %s\n",
457 fwmark, ip_vs_proto_name(protocol),
458 IP_VS_DBG_ADDR(af, vaddr), ntohs(vport),
459 svc ? "hit" : "not hit");
460
461 return svc;
462 }
463
464
465 static inline void
466 __ip_vs_bind_svc(struct ip_vs_dest *dest, struct ip_vs_service *svc)
467 {
468 atomic_inc(&svc->refcnt);
469 dest->svc = svc;
470 }
471
472 static void
473 __ip_vs_unbind_svc(struct ip_vs_dest *dest)
474 {
475 struct ip_vs_service *svc = dest->svc;
476
477 dest->svc = NULL;
478 if (atomic_dec_and_test(&svc->refcnt)) {
479 IP_VS_DBG_BUF(3, "Removing service %u/%s:%u usecnt=%d\n",
480 svc->fwmark,
481 IP_VS_DBG_ADDR(svc->af, &svc->addr),
482 ntohs(svc->port), atomic_read(&svc->usecnt));
483 free_percpu(svc->stats.cpustats);
484 kfree(svc);
485 }
486 }
487
488
489 /*
490 * Returns hash value for real service
491 */
492 static inline unsigned int ip_vs_rs_hashkey(int af,
493 const union nf_inet_addr *addr,
494 __be16 port)
495 {
496 register unsigned int porth = ntohs(port);
497 __be32 addr_fold = addr->ip;
498
499 #ifdef CONFIG_IP_VS_IPV6
500 if (af == AF_INET6)
501 addr_fold = addr->ip6[0]^addr->ip6[1]^
502 addr->ip6[2]^addr->ip6[3];
503 #endif
504
505 return (ntohl(addr_fold)^(porth>>IP_VS_RTAB_BITS)^porth)
506 & IP_VS_RTAB_MASK;
507 }
508
509 /*
510 * Hashes ip_vs_dest in rs_table by <proto,addr,port>.
511 * should be called with locked tables.
512 */
513 static int ip_vs_rs_hash(struct netns_ipvs *ipvs, struct ip_vs_dest *dest)
514 {
515 unsigned int hash;
516
517 if (!list_empty(&dest->d_list)) {
518 return 0;
519 }
520
521 /*
522 * Hash by proto,addr,port,
523 * which are the parameters of the real service.
524 */
525 hash = ip_vs_rs_hashkey(dest->af, &dest->addr, dest->port);
526
527 list_add(&dest->d_list, &ipvs->rs_table[hash]);
528
529 return 1;
530 }
531
532 /*
533 * UNhashes ip_vs_dest from rs_table.
534 * should be called with locked tables.
535 */
536 static int ip_vs_rs_unhash(struct ip_vs_dest *dest)
537 {
538 /*
539 * Remove it from the rs_table table.
540 */
541 if (!list_empty(&dest->d_list)) {
542 list_del(&dest->d_list);
543 INIT_LIST_HEAD(&dest->d_list);
544 }
545
546 return 1;
547 }
548
549 /*
550 * Lookup real service by <proto,addr,port> in the real service table.
551 */
552 struct ip_vs_dest *
553 ip_vs_lookup_real_service(struct net *net, int af, __u16 protocol,
554 const union nf_inet_addr *daddr,
555 __be16 dport)
556 {
557 struct netns_ipvs *ipvs = net_ipvs(net);
558 unsigned int hash;
559 struct ip_vs_dest *dest;
560
561 /*
562 * Check for "full" addressed entries
563 * Return the first found entry
564 */
565 hash = ip_vs_rs_hashkey(af, daddr, dport);
566
567 read_lock(&ipvs->rs_lock);
568 list_for_each_entry(dest, &ipvs->rs_table[hash], d_list) {
569 if ((dest->af == af)
570 && ip_vs_addr_equal(af, &dest->addr, daddr)
571 && (dest->port == dport)
572 && ((dest->protocol == protocol) ||
573 dest->vfwmark)) {
574 /* HIT */
575 read_unlock(&ipvs->rs_lock);
576 return dest;
577 }
578 }
579 read_unlock(&ipvs->rs_lock);
580
581 return NULL;
582 }
583
584 /*
585 * Lookup destination by {addr,port} in the given service
586 */
587 static struct ip_vs_dest *
588 ip_vs_lookup_dest(struct ip_vs_service *svc, const union nf_inet_addr *daddr,
589 __be16 dport)
590 {
591 struct ip_vs_dest *dest;
592
593 /*
594 * Find the destination for the given service
595 */
596 list_for_each_entry(dest, &svc->destinations, n_list) {
597 if ((dest->af == svc->af)
598 && ip_vs_addr_equal(svc->af, &dest->addr, daddr)
599 && (dest->port == dport)) {
600 /* HIT */
601 return dest;
602 }
603 }
604
605 return NULL;
606 }
607
608 /*
609 * Find destination by {daddr,dport,vaddr,protocol}
610 * Cretaed to be used in ip_vs_process_message() in
611 * the backup synchronization daemon. It finds the
612 * destination to be bound to the received connection
613 * on the backup.
614 *
615 * ip_vs_lookup_real_service() looked promissing, but
616 * seems not working as expected.
617 */
618 struct ip_vs_dest *ip_vs_find_dest(struct net *net, int af,
619 const union nf_inet_addr *daddr,
620 __be16 dport,
621 const union nf_inet_addr *vaddr,
622 __be16 vport, __u16 protocol, __u32 fwmark,
623 __u32 flags)
624 {
625 struct ip_vs_dest *dest;
626 struct ip_vs_service *svc;
627 __be16 port = dport;
628
629 svc = ip_vs_service_get(net, af, fwmark, protocol, vaddr, vport);
630 if (!svc)
631 return NULL;
632 if (fwmark && (flags & IP_VS_CONN_F_FWD_MASK) != IP_VS_CONN_F_MASQ)
633 port = 0;
634 dest = ip_vs_lookup_dest(svc, daddr, port);
635 if (!dest)
636 dest = ip_vs_lookup_dest(svc, daddr, port ^ dport);
637 if (dest)
638 atomic_inc(&dest->refcnt);
639 ip_vs_service_put(svc);
640 return dest;
641 }
642
643 /*
644 * Lookup dest by {svc,addr,port} in the destination trash.
645 * The destination trash is used to hold the destinations that are removed
646 * from the service table but are still referenced by some conn entries.
647 * The reason to add the destination trash is when the dest is temporary
648 * down (either by administrator or by monitor program), the dest can be
649 * picked back from the trash, the remaining connections to the dest can
650 * continue, and the counting information of the dest is also useful for
651 * scheduling.
652 */
653 static struct ip_vs_dest *
654 ip_vs_trash_get_dest(struct ip_vs_service *svc, const union nf_inet_addr *daddr,
655 __be16 dport)
656 {
657 struct ip_vs_dest *dest, *nxt;
658 struct netns_ipvs *ipvs = net_ipvs(svc->net);
659
660 /*
661 * Find the destination in trash
662 */
663 list_for_each_entry_safe(dest, nxt, &ipvs->dest_trash, n_list) {
664 IP_VS_DBG_BUF(3, "Destination %u/%s:%u still in trash, "
665 "dest->refcnt=%d\n",
666 dest->vfwmark,
667 IP_VS_DBG_ADDR(svc->af, &dest->addr),
668 ntohs(dest->port),
669 atomic_read(&dest->refcnt));
670 if (dest->af == svc->af &&
671 ip_vs_addr_equal(svc->af, &dest->addr, daddr) &&
672 dest->port == dport &&
673 dest->vfwmark == svc->fwmark &&
674 dest->protocol == svc->protocol &&
675 (svc->fwmark ||
676 (ip_vs_addr_equal(svc->af, &dest->vaddr, &svc->addr) &&
677 dest->vport == svc->port))) {
678 /* HIT */
679 return dest;
680 }
681
682 /*
683 * Try to purge the destination from trash if not referenced
684 */
685 if (atomic_read(&dest->refcnt) == 1) {
686 IP_VS_DBG_BUF(3, "Removing destination %u/%s:%u "
687 "from trash\n",
688 dest->vfwmark,
689 IP_VS_DBG_ADDR(svc->af, &dest->addr),
690 ntohs(dest->port));
691 list_del(&dest->n_list);
692 ip_vs_dst_reset(dest);
693 __ip_vs_unbind_svc(dest);
694 free_percpu(dest->stats.cpustats);
695 kfree(dest);
696 }
697 }
698
699 return NULL;
700 }
701
702
703 /*
704 * Clean up all the destinations in the trash
705 * Called by the ip_vs_control_cleanup()
706 *
707 * When the ip_vs_control_clearup is activated by ipvs module exit,
708 * the service tables must have been flushed and all the connections
709 * are expired, and the refcnt of each destination in the trash must
710 * be 1, so we simply release them here.
711 */
712 static void ip_vs_trash_cleanup(struct net *net)
713 {
714 struct ip_vs_dest *dest, *nxt;
715 struct netns_ipvs *ipvs = net_ipvs(net);
716
717 list_for_each_entry_safe(dest, nxt, &ipvs->dest_trash, n_list) {
718 list_del(&dest->n_list);
719 ip_vs_dst_reset(dest);
720 __ip_vs_unbind_svc(dest);
721 free_percpu(dest->stats.cpustats);
722 kfree(dest);
723 }
724 }
725
726 static void
727 ip_vs_copy_stats(struct ip_vs_stats_user *dst, struct ip_vs_stats *src)
728 {
729 #define IP_VS_SHOW_STATS_COUNTER(c) dst->c = src->ustats.c - src->ustats0.c
730
731 spin_lock_bh(&src->lock);
732
733 IP_VS_SHOW_STATS_COUNTER(conns);
734 IP_VS_SHOW_STATS_COUNTER(inpkts);
735 IP_VS_SHOW_STATS_COUNTER(outpkts);
736 IP_VS_SHOW_STATS_COUNTER(inbytes);
737 IP_VS_SHOW_STATS_COUNTER(outbytes);
738
739 ip_vs_read_estimator(dst, src);
740
741 spin_unlock_bh(&src->lock);
742 }
743
744 static void
745 ip_vs_zero_stats(struct ip_vs_stats *stats)
746 {
747 spin_lock_bh(&stats->lock);
748
749 /* get current counters as zero point, rates are zeroed */
750
751 #define IP_VS_ZERO_STATS_COUNTER(c) stats->ustats0.c = stats->ustats.c
752
753 IP_VS_ZERO_STATS_COUNTER(conns);
754 IP_VS_ZERO_STATS_COUNTER(inpkts);
755 IP_VS_ZERO_STATS_COUNTER(outpkts);
756 IP_VS_ZERO_STATS_COUNTER(inbytes);
757 IP_VS_ZERO_STATS_COUNTER(outbytes);
758
759 ip_vs_zero_estimator(stats);
760
761 spin_unlock_bh(&stats->lock);
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, struct ip_vs_dest *dest,
769 struct ip_vs_dest_user_kern *udest, int add)
770 {
771 struct netns_ipvs *ipvs = net_ipvs(svc->net);
772 int conn_flags;
773
774 /* set the weight and the flags */
775 atomic_set(&dest->weight, udest->weight);
776 conn_flags = udest->conn_flags & IP_VS_CONN_F_DEST_MASK;
777 conn_flags |= IP_VS_CONN_F_INACTIVE;
778
779 /* set the IP_VS_CONN_F_NOOUTPUT flag if not masquerading/NAT */
780 if ((conn_flags & IP_VS_CONN_F_FWD_MASK) != IP_VS_CONN_F_MASQ) {
781 conn_flags |= IP_VS_CONN_F_NOOUTPUT;
782 } else {
783 /*
784 * Put the real service in rs_table if not present.
785 * For now only for NAT!
786 */
787 write_lock_bh(&ipvs->rs_lock);
788 ip_vs_rs_hash(ipvs, dest);
789 write_unlock_bh(&ipvs->rs_lock);
790 }
791 atomic_set(&dest->conn_flags, conn_flags);
792
793 /* bind the service */
794 if (!dest->svc) {
795 __ip_vs_bind_svc(dest, svc);
796 } else {
797 if (dest->svc != svc) {
798 __ip_vs_unbind_svc(dest);
799 ip_vs_zero_stats(&dest->stats);
800 __ip_vs_bind_svc(dest, svc);
801 }
802 }
803
804 /* set the dest status flags */
805 dest->flags |= IP_VS_DEST_F_AVAILABLE;
806
807 if (udest->u_threshold == 0 || udest->u_threshold > dest->u_threshold)
808 dest->flags &= ~IP_VS_DEST_F_OVERLOAD;
809 dest->u_threshold = udest->u_threshold;
810 dest->l_threshold = udest->l_threshold;
811
812 spin_lock_bh(&dest->dst_lock);
813 ip_vs_dst_reset(dest);
814 spin_unlock_bh(&dest->dst_lock);
815
816 if (add)
817 ip_vs_start_estimator(svc->net, &dest->stats);
818
819 write_lock_bh(&__ip_vs_svc_lock);
820
821 /* Wait until all other svc users go away */
822 IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 0);
823
824 if (add) {
825 list_add(&dest->n_list, &svc->destinations);
826 svc->num_dests++;
827 }
828
829 /* call the update_service, because server weight may be changed */
830 if (svc->scheduler->update_service)
831 svc->scheduler->update_service(svc);
832
833 write_unlock_bh(&__ip_vs_svc_lock);
834 }
835
836
837 /*
838 * Create a destination for the given service
839 */
840 static int
841 ip_vs_new_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest,
842 struct ip_vs_dest **dest_p)
843 {
844 struct ip_vs_dest *dest;
845 unsigned int atype;
846
847 EnterFunction(2);
848
849 #ifdef CONFIG_IP_VS_IPV6
850 if (svc->af == AF_INET6) {
851 atype = ipv6_addr_type(&udest->addr.in6);
852 if ((!(atype & IPV6_ADDR_UNICAST) ||
853 atype & IPV6_ADDR_LINKLOCAL) &&
854 !__ip_vs_addr_is_local_v6(svc->net, &udest->addr.in6))
855 return -EINVAL;
856 } else
857 #endif
858 {
859 atype = inet_addr_type(svc->net, udest->addr.ip);
860 if (atype != RTN_LOCAL && atype != RTN_UNICAST)
861 return -EINVAL;
862 }
863
864 dest = kzalloc(sizeof(struct ip_vs_dest), GFP_KERNEL);
865 if (dest == NULL)
866 return -ENOMEM;
867
868 dest->stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
869 if (!dest->stats.cpustats)
870 goto err_alloc;
871
872 dest->af = svc->af;
873 dest->protocol = svc->protocol;
874 dest->vaddr = svc->addr;
875 dest->vport = svc->port;
876 dest->vfwmark = svc->fwmark;
877 ip_vs_addr_copy(svc->af, &dest->addr, &udest->addr);
878 dest->port = udest->port;
879
880 atomic_set(&dest->activeconns, 0);
881 atomic_set(&dest->inactconns, 0);
882 atomic_set(&dest->persistconns, 0);
883 atomic_set(&dest->refcnt, 1);
884
885 INIT_LIST_HEAD(&dest->d_list);
886 spin_lock_init(&dest->dst_lock);
887 spin_lock_init(&dest->stats.lock);
888 __ip_vs_update_dest(svc, dest, udest, 1);
889
890 *dest_p = dest;
891
892 LeaveFunction(2);
893 return 0;
894
895 err_alloc:
896 kfree(dest);
897 return -ENOMEM;
898 }
899
900
901 /*
902 * Add a destination into an existing service
903 */
904 static int
905 ip_vs_add_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
906 {
907 struct ip_vs_dest *dest;
908 union nf_inet_addr daddr;
909 __be16 dport = udest->port;
910 int ret;
911
912 EnterFunction(2);
913
914 if (udest->weight < 0) {
915 pr_err("%s(): server weight less than zero\n", __func__);
916 return -ERANGE;
917 }
918
919 if (udest->l_threshold > udest->u_threshold) {
920 pr_err("%s(): lower threshold is higher than upper threshold\n",
921 __func__);
922 return -ERANGE;
923 }
924
925 ip_vs_addr_copy(svc->af, &daddr, &udest->addr);
926
927 /*
928 * Check if the dest already exists in the list
929 */
930 dest = ip_vs_lookup_dest(svc, &daddr, dport);
931
932 if (dest != NULL) {
933 IP_VS_DBG(1, "%s(): dest already exists\n", __func__);
934 return -EEXIST;
935 }
936
937 /*
938 * Check if the dest already exists in the trash and
939 * is from the same service
940 */
941 dest = ip_vs_trash_get_dest(svc, &daddr, dport);
942
943 if (dest != NULL) {
944 IP_VS_DBG_BUF(3, "Get destination %s:%u from trash, "
945 "dest->refcnt=%d, service %u/%s:%u\n",
946 IP_VS_DBG_ADDR(svc->af, &daddr), ntohs(dport),
947 atomic_read(&dest->refcnt),
948 dest->vfwmark,
949 IP_VS_DBG_ADDR(svc->af, &dest->vaddr),
950 ntohs(dest->vport));
951
952 /*
953 * Get the destination from the trash
954 */
955 list_del(&dest->n_list);
956
957 __ip_vs_update_dest(svc, dest, udest, 1);
958 ret = 0;
959 } else {
960 /*
961 * Allocate and initialize the dest structure
962 */
963 ret = ip_vs_new_dest(svc, udest, &dest);
964 }
965 LeaveFunction(2);
966
967 return ret;
968 }
969
970
971 /*
972 * Edit a destination in the given service
973 */
974 static int
975 ip_vs_edit_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
976 {
977 struct ip_vs_dest *dest;
978 union nf_inet_addr daddr;
979 __be16 dport = udest->port;
980
981 EnterFunction(2);
982
983 if (udest->weight < 0) {
984 pr_err("%s(): server weight less than zero\n", __func__);
985 return -ERANGE;
986 }
987
988 if (udest->l_threshold > udest->u_threshold) {
989 pr_err("%s(): lower threshold is higher than upper threshold\n",
990 __func__);
991 return -ERANGE;
992 }
993
994 ip_vs_addr_copy(svc->af, &daddr, &udest->addr);
995
996 /*
997 * Lookup the destination list
998 */
999 dest = ip_vs_lookup_dest(svc, &daddr, dport);
1000
1001 if (dest == NULL) {
1002 IP_VS_DBG(1, "%s(): dest doesn't exist\n", __func__);
1003 return -ENOENT;
1004 }
1005
1006 __ip_vs_update_dest(svc, dest, udest, 0);
1007 LeaveFunction(2);
1008
1009 return 0;
1010 }
1011
1012
1013 /*
1014 * Delete a destination (must be already unlinked from the service)
1015 */
1016 static void __ip_vs_del_dest(struct net *net, struct ip_vs_dest *dest)
1017 {
1018 struct netns_ipvs *ipvs = net_ipvs(net);
1019
1020 ip_vs_stop_estimator(net, &dest->stats);
1021
1022 /*
1023 * Remove it from the d-linked list with the real services.
1024 */
1025 write_lock_bh(&ipvs->rs_lock);
1026 ip_vs_rs_unhash(dest);
1027 write_unlock_bh(&ipvs->rs_lock);
1028
1029 /*
1030 * Decrease the refcnt of the dest, and free the dest
1031 * if nobody refers to it (refcnt=0). Otherwise, throw
1032 * the destination into the trash.
1033 */
1034 if (atomic_dec_and_test(&dest->refcnt)) {
1035 IP_VS_DBG_BUF(3, "Removing destination %u/%s:%u\n",
1036 dest->vfwmark,
1037 IP_VS_DBG_ADDR(dest->af, &dest->addr),
1038 ntohs(dest->port));
1039 ip_vs_dst_reset(dest);
1040 /* simply decrease svc->refcnt here, let the caller check
1041 and release the service if nobody refers to it.
1042 Only user context can release destination and service,
1043 and only one user context can update virtual service at a
1044 time, so the operation here is OK */
1045 atomic_dec(&dest->svc->refcnt);
1046 free_percpu(dest->stats.cpustats);
1047 kfree(dest);
1048 } else {
1049 IP_VS_DBG_BUF(3, "Moving dest %s:%u into trash, "
1050 "dest->refcnt=%d\n",
1051 IP_VS_DBG_ADDR(dest->af, &dest->addr),
1052 ntohs(dest->port),
1053 atomic_read(&dest->refcnt));
1054 list_add(&dest->n_list, &ipvs->dest_trash);
1055 atomic_inc(&dest->refcnt);
1056 }
1057 }
1058
1059
1060 /*
1061 * Unlink a destination from the given service
1062 */
1063 static void __ip_vs_unlink_dest(struct ip_vs_service *svc,
1064 struct ip_vs_dest *dest,
1065 int svcupd)
1066 {
1067 dest->flags &= ~IP_VS_DEST_F_AVAILABLE;
1068
1069 /*
1070 * Remove it from the d-linked destination list.
1071 */
1072 list_del(&dest->n_list);
1073 svc->num_dests--;
1074
1075 /*
1076 * Call the update_service function of its scheduler
1077 */
1078 if (svcupd && svc->scheduler->update_service)
1079 svc->scheduler->update_service(svc);
1080 }
1081
1082
1083 /*
1084 * Delete a destination server in the given service
1085 */
1086 static int
1087 ip_vs_del_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
1088 {
1089 struct ip_vs_dest *dest;
1090 __be16 dport = udest->port;
1091
1092 EnterFunction(2);
1093
1094 dest = ip_vs_lookup_dest(svc, &udest->addr, dport);
1095
1096 if (dest == NULL) {
1097 IP_VS_DBG(1, "%s(): destination not found!\n", __func__);
1098 return -ENOENT;
1099 }
1100
1101 write_lock_bh(&__ip_vs_svc_lock);
1102
1103 /*
1104 * Wait until all other svc users go away.
1105 */
1106 IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 0);
1107
1108 /*
1109 * Unlink dest from the service
1110 */
1111 __ip_vs_unlink_dest(svc, dest, 1);
1112
1113 write_unlock_bh(&__ip_vs_svc_lock);
1114
1115 /*
1116 * Delete the destination
1117 */
1118 __ip_vs_del_dest(svc->net, dest);
1119
1120 LeaveFunction(2);
1121
1122 return 0;
1123 }
1124
1125
1126 /*
1127 * Add a service into the service hash table
1128 */
1129 static int
1130 ip_vs_add_service(struct net *net, struct ip_vs_service_user_kern *u,
1131 struct ip_vs_service **svc_p)
1132 {
1133 int ret = 0;
1134 struct ip_vs_scheduler *sched = NULL;
1135 struct ip_vs_pe *pe = NULL;
1136 struct ip_vs_service *svc = NULL;
1137 struct netns_ipvs *ipvs = net_ipvs(net);
1138
1139 /* increase the module use count */
1140 ip_vs_use_count_inc();
1141
1142 /* Lookup the scheduler by 'u->sched_name' */
1143 sched = ip_vs_scheduler_get(u->sched_name);
1144 if (sched == NULL) {
1145 pr_info("Scheduler module ip_vs_%s not found\n", u->sched_name);
1146 ret = -ENOENT;
1147 goto out_err;
1148 }
1149
1150 if (u->pe_name && *u->pe_name) {
1151 pe = ip_vs_pe_getbyname(u->pe_name);
1152 if (pe == NULL) {
1153 pr_info("persistence engine module ip_vs_pe_%s "
1154 "not found\n", u->pe_name);
1155 ret = -ENOENT;
1156 goto out_err;
1157 }
1158 }
1159
1160 #ifdef CONFIG_IP_VS_IPV6
1161 if (u->af == AF_INET6 && (u->netmask < 1 || u->netmask > 128)) {
1162 ret = -EINVAL;
1163 goto out_err;
1164 }
1165 #endif
1166
1167 svc = kzalloc(sizeof(struct ip_vs_service), GFP_KERNEL);
1168 if (svc == NULL) {
1169 IP_VS_DBG(1, "%s(): no memory\n", __func__);
1170 ret = -ENOMEM;
1171 goto out_err;
1172 }
1173 svc->stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
1174 if (!svc->stats.cpustats)
1175 goto out_err;
1176
1177 /* I'm the first user of the service */
1178 atomic_set(&svc->usecnt, 0);
1179 atomic_set(&svc->refcnt, 0);
1180
1181 svc->af = u->af;
1182 svc->protocol = u->protocol;
1183 ip_vs_addr_copy(svc->af, &svc->addr, &u->addr);
1184 svc->port = u->port;
1185 svc->fwmark = u->fwmark;
1186 svc->flags = u->flags;
1187 svc->timeout = u->timeout * HZ;
1188 svc->netmask = u->netmask;
1189 svc->net = net;
1190
1191 INIT_LIST_HEAD(&svc->destinations);
1192 rwlock_init(&svc->sched_lock);
1193 spin_lock_init(&svc->stats.lock);
1194
1195 /* Bind the scheduler */
1196 ret = ip_vs_bind_scheduler(svc, sched);
1197 if (ret)
1198 goto out_err;
1199 sched = NULL;
1200
1201 /* Bind the ct retriever */
1202 ip_vs_bind_pe(svc, pe);
1203 pe = NULL;
1204
1205 /* Update the virtual service counters */
1206 if (svc->port == FTPPORT)
1207 atomic_inc(&ipvs->ftpsvc_counter);
1208 else if (svc->port == 0)
1209 atomic_inc(&ipvs->nullsvc_counter);
1210
1211 ip_vs_start_estimator(net, &svc->stats);
1212
1213 /* Count only IPv4 services for old get/setsockopt interface */
1214 if (svc->af == AF_INET)
1215 ipvs->num_services++;
1216
1217 /* Hash the service into the service table */
1218 write_lock_bh(&__ip_vs_svc_lock);
1219 ip_vs_svc_hash(svc);
1220 write_unlock_bh(&__ip_vs_svc_lock);
1221
1222 *svc_p = svc;
1223 /* Now there is a service - full throttle */
1224 ipvs->enable = 1;
1225 return 0;
1226
1227
1228 out_err:
1229 if (svc != NULL) {
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 if (svc->stats.cpustats)
1237 free_percpu(svc->stats.cpustats);
1238 kfree(svc);
1239 }
1240 ip_vs_scheduler_put(sched);
1241 ip_vs_pe_put(pe);
1242
1243 /* decrease the module use count */
1244 ip_vs_use_count_dec();
1245
1246 return ret;
1247 }
1248
1249
1250 /*
1251 * Edit a service and bind it with a new scheduler
1252 */
1253 static int
1254 ip_vs_edit_service(struct ip_vs_service *svc, struct ip_vs_service_user_kern *u)
1255 {
1256 struct ip_vs_scheduler *sched, *old_sched;
1257 struct ip_vs_pe *pe = NULL, *old_pe = NULL;
1258 int ret = 0;
1259
1260 /*
1261 * Lookup the scheduler, by 'u->sched_name'
1262 */
1263 sched = ip_vs_scheduler_get(u->sched_name);
1264 if (sched == NULL) {
1265 pr_info("Scheduler module ip_vs_%s not found\n", u->sched_name);
1266 return -ENOENT;
1267 }
1268 old_sched = sched;
1269
1270 if (u->pe_name && *u->pe_name) {
1271 pe = ip_vs_pe_getbyname(u->pe_name);
1272 if (pe == NULL) {
1273 pr_info("persistence engine module ip_vs_pe_%s "
1274 "not found\n", u->pe_name);
1275 ret = -ENOENT;
1276 goto out;
1277 }
1278 old_pe = pe;
1279 }
1280
1281 #ifdef CONFIG_IP_VS_IPV6
1282 if (u->af == AF_INET6 && (u->netmask < 1 || u->netmask > 128)) {
1283 ret = -EINVAL;
1284 goto out;
1285 }
1286 #endif
1287
1288 write_lock_bh(&__ip_vs_svc_lock);
1289
1290 /*
1291 * Wait until all other svc users go away.
1292 */
1293 IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 0);
1294
1295 /*
1296 * Set the flags and timeout value
1297 */
1298 svc->flags = u->flags | IP_VS_SVC_F_HASHED;
1299 svc->timeout = u->timeout * HZ;
1300 svc->netmask = u->netmask;
1301
1302 old_sched = svc->scheduler;
1303 if (sched != old_sched) {
1304 /*
1305 * Unbind the old scheduler
1306 */
1307 if ((ret = ip_vs_unbind_scheduler(svc))) {
1308 old_sched = sched;
1309 goto out_unlock;
1310 }
1311
1312 /*
1313 * Bind the new scheduler
1314 */
1315 if ((ret = ip_vs_bind_scheduler(svc, sched))) {
1316 /*
1317 * If ip_vs_bind_scheduler fails, restore the old
1318 * scheduler.
1319 * The main reason of failure is out of memory.
1320 *
1321 * The question is if the old scheduler can be
1322 * restored all the time. TODO: if it cannot be
1323 * restored some time, we must delete the service,
1324 * otherwise the system may crash.
1325 */
1326 ip_vs_bind_scheduler(svc, old_sched);
1327 old_sched = sched;
1328 goto out_unlock;
1329 }
1330 }
1331
1332 old_pe = svc->pe;
1333 if (pe != old_pe) {
1334 ip_vs_unbind_pe(svc);
1335 ip_vs_bind_pe(svc, pe);
1336 }
1337
1338 out_unlock:
1339 write_unlock_bh(&__ip_vs_svc_lock);
1340 out:
1341 ip_vs_scheduler_put(old_sched);
1342 ip_vs_pe_put(old_pe);
1343 return ret;
1344 }
1345
1346
1347 /*
1348 * Delete a service from the service list
1349 * - The service must be unlinked, unlocked and not referenced!
1350 * - We are called under _bh lock
1351 */
1352 static void __ip_vs_del_service(struct ip_vs_service *svc)
1353 {
1354 struct ip_vs_dest *dest, *nxt;
1355 struct ip_vs_scheduler *old_sched;
1356 struct ip_vs_pe *old_pe;
1357 struct netns_ipvs *ipvs = net_ipvs(svc->net);
1358
1359 pr_info("%s: enter\n", __func__);
1360
1361 /* Count only IPv4 services for old get/setsockopt interface */
1362 if (svc->af == AF_INET)
1363 ipvs->num_services--;
1364
1365 ip_vs_stop_estimator(svc->net, &svc->stats);
1366
1367 /* Unbind scheduler */
1368 old_sched = svc->scheduler;
1369 ip_vs_unbind_scheduler(svc);
1370 ip_vs_scheduler_put(old_sched);
1371
1372 /* Unbind persistence engine */
1373 old_pe = svc->pe;
1374 ip_vs_unbind_pe(svc);
1375 ip_vs_pe_put(old_pe);
1376
1377 /* Unbind app inc */
1378 if (svc->inc) {
1379 ip_vs_app_inc_put(svc->inc);
1380 svc->inc = NULL;
1381 }
1382
1383 /*
1384 * Unlink the whole destination list
1385 */
1386 list_for_each_entry_safe(dest, nxt, &svc->destinations, n_list) {
1387 __ip_vs_unlink_dest(svc, dest, 0);
1388 __ip_vs_del_dest(svc->net, dest);
1389 }
1390
1391 /*
1392 * Update the virtual service counters
1393 */
1394 if (svc->port == FTPPORT)
1395 atomic_dec(&ipvs->ftpsvc_counter);
1396 else if (svc->port == 0)
1397 atomic_dec(&ipvs->nullsvc_counter);
1398
1399 /*
1400 * Free the service if nobody refers to it
1401 */
1402 if (atomic_read(&svc->refcnt) == 0) {
1403 IP_VS_DBG_BUF(3, "Removing service %u/%s:%u usecnt=%d\n",
1404 svc->fwmark,
1405 IP_VS_DBG_ADDR(svc->af, &svc->addr),
1406 ntohs(svc->port), atomic_read(&svc->usecnt));
1407 free_percpu(svc->stats.cpustats);
1408 kfree(svc);
1409 }
1410
1411 /* decrease the module use count */
1412 ip_vs_use_count_dec();
1413 }
1414
1415 /*
1416 * Unlink a service from list and try to delete it if its refcnt reached 0
1417 */
1418 static void ip_vs_unlink_service(struct ip_vs_service *svc)
1419 {
1420 /*
1421 * Unhash it from the service table
1422 */
1423 write_lock_bh(&__ip_vs_svc_lock);
1424
1425 ip_vs_svc_unhash(svc);
1426
1427 /*
1428 * Wait until all the svc users go away.
1429 */
1430 IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 0);
1431
1432 __ip_vs_del_service(svc);
1433
1434 write_unlock_bh(&__ip_vs_svc_lock);
1435 }
1436
1437 /*
1438 * Delete a service from the service list
1439 */
1440 static int ip_vs_del_service(struct ip_vs_service *svc)
1441 {
1442 if (svc == NULL)
1443 return -EEXIST;
1444 ip_vs_unlink_service(svc);
1445
1446 return 0;
1447 }
1448
1449
1450 /*
1451 * Flush all the virtual services
1452 */
1453 static int ip_vs_flush(struct net *net)
1454 {
1455 int idx;
1456 struct ip_vs_service *svc, *nxt;
1457
1458 /*
1459 * Flush the service table hashed by <netns,protocol,addr,port>
1460 */
1461 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1462 list_for_each_entry_safe(svc, nxt, &ip_vs_svc_table[idx],
1463 s_list) {
1464 if (net_eq(svc->net, net))
1465 ip_vs_unlink_service(svc);
1466 }
1467 }
1468
1469 /*
1470 * Flush the service table hashed by fwmark
1471 */
1472 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1473 list_for_each_entry_safe(svc, nxt,
1474 &ip_vs_svc_fwm_table[idx], f_list) {
1475 if (net_eq(svc->net, net))
1476 ip_vs_unlink_service(svc);
1477 }
1478 }
1479
1480 return 0;
1481 }
1482
1483 /*
1484 * Delete service by {netns} in the service table.
1485 * Called by __ip_vs_cleanup()
1486 */
1487 void ip_vs_service_net_cleanup(struct net *net)
1488 {
1489 EnterFunction(2);
1490 /* Check for "full" addressed entries */
1491 mutex_lock(&__ip_vs_mutex);
1492 ip_vs_flush(net);
1493 mutex_unlock(&__ip_vs_mutex);
1494 LeaveFunction(2);
1495 }
1496 /*
1497 * Release dst hold by dst_cache
1498 */
1499 static inline void
1500 __ip_vs_dev_reset(struct ip_vs_dest *dest, struct net_device *dev)
1501 {
1502 spin_lock_bh(&dest->dst_lock);
1503 if (dest->dst_cache && dest->dst_cache->dev == dev) {
1504 IP_VS_DBG_BUF(3, "Reset dev:%s dest %s:%u ,dest->refcnt=%d\n",
1505 dev->name,
1506 IP_VS_DBG_ADDR(dest->af, &dest->addr),
1507 ntohs(dest->port),
1508 atomic_read(&dest->refcnt));
1509 ip_vs_dst_reset(dest);
1510 }
1511 spin_unlock_bh(&dest->dst_lock);
1512
1513 }
1514 /*
1515 * Netdev event receiver
1516 * Currently only NETDEV_UNREGISTER is handled, i.e. if we hold a reference to
1517 * a device that is "unregister" it must be released.
1518 */
1519 static int ip_vs_dst_event(struct notifier_block *this, unsigned long event,
1520 void *ptr)
1521 {
1522 struct net_device *dev = ptr;
1523 struct net *net = dev_net(dev);
1524 struct ip_vs_service *svc;
1525 struct ip_vs_dest *dest;
1526 unsigned int idx;
1527
1528 if (event != NETDEV_UNREGISTER)
1529 return NOTIFY_DONE;
1530 IP_VS_DBG(3, "%s() dev=%s\n", __func__, dev->name);
1531 EnterFunction(2);
1532 mutex_lock(&__ip_vs_mutex);
1533 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1534 list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
1535 if (net_eq(svc->net, net)) {
1536 list_for_each_entry(dest, &svc->destinations,
1537 n_list) {
1538 __ip_vs_dev_reset(dest, dev);
1539 }
1540 }
1541 }
1542
1543 list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
1544 if (net_eq(svc->net, net)) {
1545 list_for_each_entry(dest, &svc->destinations,
1546 n_list) {
1547 __ip_vs_dev_reset(dest, dev);
1548 }
1549 }
1550
1551 }
1552 }
1553
1554 list_for_each_entry(dest, &net_ipvs(net)->dest_trash, n_list) {
1555 __ip_vs_dev_reset(dest, dev);
1556 }
1557 mutex_unlock(&__ip_vs_mutex);
1558 LeaveFunction(2);
1559 return NOTIFY_DONE;
1560 }
1561
1562 /*
1563 * Zero counters in a service or all services
1564 */
1565 static int ip_vs_zero_service(struct ip_vs_service *svc)
1566 {
1567 struct ip_vs_dest *dest;
1568
1569 write_lock_bh(&__ip_vs_svc_lock);
1570 list_for_each_entry(dest, &svc->destinations, n_list) {
1571 ip_vs_zero_stats(&dest->stats);
1572 }
1573 ip_vs_zero_stats(&svc->stats);
1574 write_unlock_bh(&__ip_vs_svc_lock);
1575 return 0;
1576 }
1577
1578 static int ip_vs_zero_all(struct net *net)
1579 {
1580 int idx;
1581 struct ip_vs_service *svc;
1582
1583 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1584 list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
1585 if (net_eq(svc->net, net))
1586 ip_vs_zero_service(svc);
1587 }
1588 }
1589
1590 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1591 list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
1592 if (net_eq(svc->net, net))
1593 ip_vs_zero_service(svc);
1594 }
1595 }
1596
1597 ip_vs_zero_stats(&net_ipvs(net)->tot_stats);
1598 return 0;
1599 }
1600
1601 #ifdef CONFIG_SYSCTL
1602
1603 static int zero;
1604 static int three = 3;
1605
1606 static int
1607 proc_do_defense_mode(ctl_table *table, int write,
1608 void __user *buffer, size_t *lenp, loff_t *ppos)
1609 {
1610 struct net *net = current->nsproxy->net_ns;
1611 int *valp = table->data;
1612 int val = *valp;
1613 int rc;
1614
1615 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1616 if (write && (*valp != val)) {
1617 if ((*valp < 0) || (*valp > 3)) {
1618 /* Restore the correct value */
1619 *valp = val;
1620 } else {
1621 update_defense_level(net_ipvs(net));
1622 }
1623 }
1624 return rc;
1625 }
1626
1627 static int
1628 proc_do_sync_threshold(ctl_table *table, int write,
1629 void __user *buffer, size_t *lenp, loff_t *ppos)
1630 {
1631 int *valp = table->data;
1632 int val[2];
1633 int rc;
1634
1635 /* backup the value first */
1636 memcpy(val, valp, sizeof(val));
1637
1638 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1639 if (write && (valp[0] < 0 || valp[1] < 0 ||
1640 (valp[0] >= valp[1] && valp[1]))) {
1641 /* Restore the correct value */
1642 memcpy(valp, val, sizeof(val));
1643 }
1644 return rc;
1645 }
1646
1647 static int
1648 proc_do_sync_mode(ctl_table *table, int write,
1649 void __user *buffer, size_t *lenp, loff_t *ppos)
1650 {
1651 int *valp = table->data;
1652 int val = *valp;
1653 int rc;
1654
1655 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1656 if (write && (*valp != val)) {
1657 if ((*valp < 0) || (*valp > 1)) {
1658 /* Restore the correct value */
1659 *valp = val;
1660 }
1661 }
1662 return rc;
1663 }
1664
1665 static int
1666 proc_do_sync_ports(ctl_table *table, int write,
1667 void __user *buffer, size_t *lenp, loff_t *ppos)
1668 {
1669 int *valp = table->data;
1670 int val = *valp;
1671 int rc;
1672
1673 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1674 if (write && (*valp != val)) {
1675 if (*valp < 1 || !is_power_of_2(*valp)) {
1676 /* Restore the correct value */
1677 *valp = val;
1678 }
1679 }
1680 return rc;
1681 }
1682
1683 /*
1684 * IPVS sysctl table (under the /proc/sys/net/ipv4/vs/)
1685 * Do not change order or insert new entries without
1686 * align with netns init in ip_vs_control_net_init()
1687 */
1688
1689 static struct ctl_table vs_vars[] = {
1690 {
1691 .procname = "amemthresh",
1692 .maxlen = sizeof(int),
1693 .mode = 0644,
1694 .proc_handler = proc_dointvec,
1695 },
1696 {
1697 .procname = "am_droprate",
1698 .maxlen = sizeof(int),
1699 .mode = 0644,
1700 .proc_handler = proc_dointvec,
1701 },
1702 {
1703 .procname = "drop_entry",
1704 .maxlen = sizeof(int),
1705 .mode = 0644,
1706 .proc_handler = proc_do_defense_mode,
1707 },
1708 {
1709 .procname = "drop_packet",
1710 .maxlen = sizeof(int),
1711 .mode = 0644,
1712 .proc_handler = proc_do_defense_mode,
1713 },
1714 #ifdef CONFIG_IP_VS_NFCT
1715 {
1716 .procname = "conntrack",
1717 .maxlen = sizeof(int),
1718 .mode = 0644,
1719 .proc_handler = &proc_dointvec,
1720 },
1721 #endif
1722 {
1723 .procname = "secure_tcp",
1724 .maxlen = sizeof(int),
1725 .mode = 0644,
1726 .proc_handler = proc_do_defense_mode,
1727 },
1728 {
1729 .procname = "snat_reroute",
1730 .maxlen = sizeof(int),
1731 .mode = 0644,
1732 .proc_handler = &proc_dointvec,
1733 },
1734 {
1735 .procname = "sync_version",
1736 .maxlen = sizeof(int),
1737 .mode = 0644,
1738 .proc_handler = &proc_do_sync_mode,
1739 },
1740 {
1741 .procname = "sync_ports",
1742 .maxlen = sizeof(int),
1743 .mode = 0644,
1744 .proc_handler = &proc_do_sync_ports,
1745 },
1746 {
1747 .procname = "sync_qlen_max",
1748 .maxlen = sizeof(int),
1749 .mode = 0644,
1750 .proc_handler = proc_dointvec,
1751 },
1752 {
1753 .procname = "sync_sock_size",
1754 .maxlen = sizeof(int),
1755 .mode = 0644,
1756 .proc_handler = proc_dointvec,
1757 },
1758 {
1759 .procname = "cache_bypass",
1760 .maxlen = sizeof(int),
1761 .mode = 0644,
1762 .proc_handler = proc_dointvec,
1763 },
1764 {
1765 .procname = "expire_nodest_conn",
1766 .maxlen = sizeof(int),
1767 .mode = 0644,
1768 .proc_handler = proc_dointvec,
1769 },
1770 {
1771 .procname = "expire_quiescent_template",
1772 .maxlen = sizeof(int),
1773 .mode = 0644,
1774 .proc_handler = proc_dointvec,
1775 },
1776 {
1777 .procname = "sync_threshold",
1778 .maxlen =
1779 sizeof(((struct netns_ipvs *)0)->sysctl_sync_threshold),
1780 .mode = 0644,
1781 .proc_handler = proc_do_sync_threshold,
1782 },
1783 {
1784 .procname = "sync_refresh_period",
1785 .maxlen = sizeof(int),
1786 .mode = 0644,
1787 .proc_handler = proc_dointvec_jiffies,
1788 },
1789 {
1790 .procname = "sync_retries",
1791 .maxlen = sizeof(int),
1792 .mode = 0644,
1793 .proc_handler = proc_dointvec_minmax,
1794 .extra1 = &zero,
1795 .extra2 = &three,
1796 },
1797 {
1798 .procname = "nat_icmp_send",
1799 .maxlen = sizeof(int),
1800 .mode = 0644,
1801 .proc_handler = proc_dointvec,
1802 },
1803 #ifdef CONFIG_IP_VS_DEBUG
1804 {
1805 .procname = "debug_level",
1806 .data = &sysctl_ip_vs_debug_level,
1807 .maxlen = sizeof(int),
1808 .mode = 0644,
1809 .proc_handler = proc_dointvec,
1810 },
1811 #endif
1812 #if 0
1813 {
1814 .procname = "timeout_established",
1815 .data = &vs_timeout_table_dos.timeout[IP_VS_S_ESTABLISHED],
1816 .maxlen = sizeof(int),
1817 .mode = 0644,
1818 .proc_handler = proc_dointvec_jiffies,
1819 },
1820 {
1821 .procname = "timeout_synsent",
1822 .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYN_SENT],
1823 .maxlen = sizeof(int),
1824 .mode = 0644,
1825 .proc_handler = proc_dointvec_jiffies,
1826 },
1827 {
1828 .procname = "timeout_synrecv",
1829 .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYN_RECV],
1830 .maxlen = sizeof(int),
1831 .mode = 0644,
1832 .proc_handler = proc_dointvec_jiffies,
1833 },
1834 {
1835 .procname = "timeout_finwait",
1836 .data = &vs_timeout_table_dos.timeout[IP_VS_S_FIN_WAIT],
1837 .maxlen = sizeof(int),
1838 .mode = 0644,
1839 .proc_handler = proc_dointvec_jiffies,
1840 },
1841 {
1842 .procname = "timeout_timewait",
1843 .data = &vs_timeout_table_dos.timeout[IP_VS_S_TIME_WAIT],
1844 .maxlen = sizeof(int),
1845 .mode = 0644,
1846 .proc_handler = proc_dointvec_jiffies,
1847 },
1848 {
1849 .procname = "timeout_close",
1850 .data = &vs_timeout_table_dos.timeout[IP_VS_S_CLOSE],
1851 .maxlen = sizeof(int),
1852 .mode = 0644,
1853 .proc_handler = proc_dointvec_jiffies,
1854 },
1855 {
1856 .procname = "timeout_closewait",
1857 .data = &vs_timeout_table_dos.timeout[IP_VS_S_CLOSE_WAIT],
1858 .maxlen = sizeof(int),
1859 .mode = 0644,
1860 .proc_handler = proc_dointvec_jiffies,
1861 },
1862 {
1863 .procname = "timeout_lastack",
1864 .data = &vs_timeout_table_dos.timeout[IP_VS_S_LAST_ACK],
1865 .maxlen = sizeof(int),
1866 .mode = 0644,
1867 .proc_handler = proc_dointvec_jiffies,
1868 },
1869 {
1870 .procname = "timeout_listen",
1871 .data = &vs_timeout_table_dos.timeout[IP_VS_S_LISTEN],
1872 .maxlen = sizeof(int),
1873 .mode = 0644,
1874 .proc_handler = proc_dointvec_jiffies,
1875 },
1876 {
1877 .procname = "timeout_synack",
1878 .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYNACK],
1879 .maxlen = sizeof(int),
1880 .mode = 0644,
1881 .proc_handler = proc_dointvec_jiffies,
1882 },
1883 {
1884 .procname = "timeout_udp",
1885 .data = &vs_timeout_table_dos.timeout[IP_VS_S_UDP],
1886 .maxlen = sizeof(int),
1887 .mode = 0644,
1888 .proc_handler = proc_dointvec_jiffies,
1889 },
1890 {
1891 .procname = "timeout_icmp",
1892 .data = &vs_timeout_table_dos.timeout[IP_VS_S_ICMP],
1893 .maxlen = sizeof(int),
1894 .mode = 0644,
1895 .proc_handler = proc_dointvec_jiffies,
1896 },
1897 #endif
1898 { }
1899 };
1900
1901 #endif
1902
1903 #ifdef CONFIG_PROC_FS
1904
1905 struct ip_vs_iter {
1906 struct seq_net_private p; /* Do not move this, netns depends upon it*/
1907 struct list_head *table;
1908 int bucket;
1909 };
1910
1911 /*
1912 * Write the contents of the VS rule table to a PROCfs file.
1913 * (It is kept just for backward compatibility)
1914 */
1915 static inline const char *ip_vs_fwd_name(unsigned int flags)
1916 {
1917 switch (flags & IP_VS_CONN_F_FWD_MASK) {
1918 case IP_VS_CONN_F_LOCALNODE:
1919 return "Local";
1920 case IP_VS_CONN_F_TUNNEL:
1921 return "Tunnel";
1922 case IP_VS_CONN_F_DROUTE:
1923 return "Route";
1924 default:
1925 return "Masq";
1926 }
1927 }
1928
1929
1930 /* Get the Nth entry in the two lists */
1931 static struct ip_vs_service *ip_vs_info_array(struct seq_file *seq, loff_t pos)
1932 {
1933 struct net *net = seq_file_net(seq);
1934 struct ip_vs_iter *iter = seq->private;
1935 int idx;
1936 struct ip_vs_service *svc;
1937
1938 /* look in hash by protocol */
1939 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1940 list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
1941 if (net_eq(svc->net, net) && pos-- == 0) {
1942 iter->table = ip_vs_svc_table;
1943 iter->bucket = idx;
1944 return svc;
1945 }
1946 }
1947 }
1948
1949 /* keep looking in fwmark */
1950 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1951 list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
1952 if (net_eq(svc->net, net) && pos-- == 0) {
1953 iter->table = ip_vs_svc_fwm_table;
1954 iter->bucket = idx;
1955 return svc;
1956 }
1957 }
1958 }
1959
1960 return NULL;
1961 }
1962
1963 static void *ip_vs_info_seq_start(struct seq_file *seq, loff_t *pos)
1964 __acquires(__ip_vs_svc_lock)
1965 {
1966
1967 read_lock_bh(&__ip_vs_svc_lock);
1968 return *pos ? ip_vs_info_array(seq, *pos - 1) : SEQ_START_TOKEN;
1969 }
1970
1971
1972 static void *ip_vs_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1973 {
1974 struct list_head *e;
1975 struct ip_vs_iter *iter;
1976 struct ip_vs_service *svc;
1977
1978 ++*pos;
1979 if (v == SEQ_START_TOKEN)
1980 return ip_vs_info_array(seq,0);
1981
1982 svc = v;
1983 iter = seq->private;
1984
1985 if (iter->table == ip_vs_svc_table) {
1986 /* next service in table hashed by protocol */
1987 if ((e = svc->s_list.next) != &ip_vs_svc_table[iter->bucket])
1988 return list_entry(e, struct ip_vs_service, s_list);
1989
1990
1991 while (++iter->bucket < IP_VS_SVC_TAB_SIZE) {
1992 list_for_each_entry(svc,&ip_vs_svc_table[iter->bucket],
1993 s_list) {
1994 return svc;
1995 }
1996 }
1997
1998 iter->table = ip_vs_svc_fwm_table;
1999 iter->bucket = -1;
2000 goto scan_fwmark;
2001 }
2002
2003 /* next service in hashed by fwmark */
2004 if ((e = svc->f_list.next) != &ip_vs_svc_fwm_table[iter->bucket])
2005 return list_entry(e, struct ip_vs_service, f_list);
2006
2007 scan_fwmark:
2008 while (++iter->bucket < IP_VS_SVC_TAB_SIZE) {
2009 list_for_each_entry(svc, &ip_vs_svc_fwm_table[iter->bucket],
2010 f_list)
2011 return svc;
2012 }
2013
2014 return NULL;
2015 }
2016
2017 static void ip_vs_info_seq_stop(struct seq_file *seq, void *v)
2018 __releases(__ip_vs_svc_lock)
2019 {
2020 read_unlock_bh(&__ip_vs_svc_lock);
2021 }
2022
2023
2024 static int ip_vs_info_seq_show(struct seq_file *seq, void *v)
2025 {
2026 if (v == SEQ_START_TOKEN) {
2027 seq_printf(seq,
2028 "IP Virtual Server version %d.%d.%d (size=%d)\n",
2029 NVERSION(IP_VS_VERSION_CODE), ip_vs_conn_tab_size);
2030 seq_puts(seq,
2031 "Prot LocalAddress:Port Scheduler Flags\n");
2032 seq_puts(seq,
2033 " -> RemoteAddress:Port Forward Weight ActiveConn InActConn\n");
2034 } else {
2035 const struct ip_vs_service *svc = v;
2036 const struct ip_vs_iter *iter = seq->private;
2037 const struct ip_vs_dest *dest;
2038
2039 if (iter->table == ip_vs_svc_table) {
2040 #ifdef CONFIG_IP_VS_IPV6
2041 if (svc->af == AF_INET6)
2042 seq_printf(seq, "%s [%pI6]:%04X %s ",
2043 ip_vs_proto_name(svc->protocol),
2044 &svc->addr.in6,
2045 ntohs(svc->port),
2046 svc->scheduler->name);
2047 else
2048 #endif
2049 seq_printf(seq, "%s %08X:%04X %s %s ",
2050 ip_vs_proto_name(svc->protocol),
2051 ntohl(svc->addr.ip),
2052 ntohs(svc->port),
2053 svc->scheduler->name,
2054 (svc->flags & IP_VS_SVC_F_ONEPACKET)?"ops ":"");
2055 } else {
2056 seq_printf(seq, "FWM %08X %s %s",
2057 svc->fwmark, svc->scheduler->name,
2058 (svc->flags & IP_VS_SVC_F_ONEPACKET)?"ops ":"");
2059 }
2060
2061 if (svc->flags & IP_VS_SVC_F_PERSISTENT)
2062 seq_printf(seq, "persistent %d %08X\n",
2063 svc->timeout,
2064 ntohl(svc->netmask));
2065 else
2066 seq_putc(seq, '\n');
2067
2068 list_for_each_entry(dest, &svc->destinations, n_list) {
2069 #ifdef CONFIG_IP_VS_IPV6
2070 if (dest->af == AF_INET6)
2071 seq_printf(seq,
2072 " -> [%pI6]:%04X"
2073 " %-7s %-6d %-10d %-10d\n",
2074 &dest->addr.in6,
2075 ntohs(dest->port),
2076 ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
2077 atomic_read(&dest->weight),
2078 atomic_read(&dest->activeconns),
2079 atomic_read(&dest->inactconns));
2080 else
2081 #endif
2082 seq_printf(seq,
2083 " -> %08X:%04X "
2084 "%-7s %-6d %-10d %-10d\n",
2085 ntohl(dest->addr.ip),
2086 ntohs(dest->port),
2087 ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
2088 atomic_read(&dest->weight),
2089 atomic_read(&dest->activeconns),
2090 atomic_read(&dest->inactconns));
2091
2092 }
2093 }
2094 return 0;
2095 }
2096
2097 static const struct seq_operations ip_vs_info_seq_ops = {
2098 .start = ip_vs_info_seq_start,
2099 .next = ip_vs_info_seq_next,
2100 .stop = ip_vs_info_seq_stop,
2101 .show = ip_vs_info_seq_show,
2102 };
2103
2104 static int ip_vs_info_open(struct inode *inode, struct file *file)
2105 {
2106 return seq_open_net(inode, file, &ip_vs_info_seq_ops,
2107 sizeof(struct ip_vs_iter));
2108 }
2109
2110 static const struct file_operations ip_vs_info_fops = {
2111 .owner = THIS_MODULE,
2112 .open = ip_vs_info_open,
2113 .read = seq_read,
2114 .llseek = seq_lseek,
2115 .release = seq_release_net,
2116 };
2117
2118 static int ip_vs_stats_show(struct seq_file *seq, void *v)
2119 {
2120 struct net *net = seq_file_single_net(seq);
2121 struct ip_vs_stats_user show;
2122
2123 /* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2124 seq_puts(seq,
2125 " Total Incoming Outgoing Incoming Outgoing\n");
2126 seq_printf(seq,
2127 " Conns Packets Packets Bytes Bytes\n");
2128
2129 ip_vs_copy_stats(&show, &net_ipvs(net)->tot_stats);
2130 seq_printf(seq, "%8X %8X %8X %16LX %16LX\n\n", show.conns,
2131 show.inpkts, show.outpkts,
2132 (unsigned long long) show.inbytes,
2133 (unsigned long long) show.outbytes);
2134
2135 /* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2136 seq_puts(seq,
2137 " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
2138 seq_printf(seq, "%8X %8X %8X %16X %16X\n",
2139 show.cps, show.inpps, show.outpps,
2140 show.inbps, show.outbps);
2141
2142 return 0;
2143 }
2144
2145 static int ip_vs_stats_seq_open(struct inode *inode, struct file *file)
2146 {
2147 return single_open_net(inode, file, ip_vs_stats_show);
2148 }
2149
2150 static const struct file_operations ip_vs_stats_fops = {
2151 .owner = THIS_MODULE,
2152 .open = ip_vs_stats_seq_open,
2153 .read = seq_read,
2154 .llseek = seq_lseek,
2155 .release = single_release_net,
2156 };
2157
2158 static int ip_vs_stats_percpu_show(struct seq_file *seq, void *v)
2159 {
2160 struct net *net = seq_file_single_net(seq);
2161 struct ip_vs_stats *tot_stats = &net_ipvs(net)->tot_stats;
2162 struct ip_vs_cpu_stats *cpustats = tot_stats->cpustats;
2163 struct ip_vs_stats_user rates;
2164 int i;
2165
2166 /* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2167 seq_puts(seq,
2168 " Total Incoming Outgoing Incoming Outgoing\n");
2169 seq_printf(seq,
2170 "CPU Conns Packets Packets Bytes Bytes\n");
2171
2172 for_each_possible_cpu(i) {
2173 struct ip_vs_cpu_stats *u = per_cpu_ptr(cpustats, i);
2174 unsigned int start;
2175 __u64 inbytes, outbytes;
2176
2177 do {
2178 start = u64_stats_fetch_begin_bh(&u->syncp);
2179 inbytes = u->ustats.inbytes;
2180 outbytes = u->ustats.outbytes;
2181 } while (u64_stats_fetch_retry_bh(&u->syncp, start));
2182
2183 seq_printf(seq, "%3X %8X %8X %8X %16LX %16LX\n",
2184 i, u->ustats.conns, u->ustats.inpkts,
2185 u->ustats.outpkts, (__u64)inbytes,
2186 (__u64)outbytes);
2187 }
2188
2189 spin_lock_bh(&tot_stats->lock);
2190
2191 seq_printf(seq, " ~ %8X %8X %8X %16LX %16LX\n\n",
2192 tot_stats->ustats.conns, tot_stats->ustats.inpkts,
2193 tot_stats->ustats.outpkts,
2194 (unsigned long long) tot_stats->ustats.inbytes,
2195 (unsigned long long) tot_stats->ustats.outbytes);
2196
2197 ip_vs_read_estimator(&rates, tot_stats);
2198
2199 spin_unlock_bh(&tot_stats->lock);
2200
2201 /* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2202 seq_puts(seq,
2203 " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
2204 seq_printf(seq, " %8X %8X %8X %16X %16X\n",
2205 rates.cps,
2206 rates.inpps,
2207 rates.outpps,
2208 rates.inbps,
2209 rates.outbps);
2210
2211 return 0;
2212 }
2213
2214 static int ip_vs_stats_percpu_seq_open(struct inode *inode, struct file *file)
2215 {
2216 return single_open_net(inode, file, ip_vs_stats_percpu_show);
2217 }
2218
2219 static const struct file_operations ip_vs_stats_percpu_fops = {
2220 .owner = THIS_MODULE,
2221 .open = ip_vs_stats_percpu_seq_open,
2222 .read = seq_read,
2223 .llseek = seq_lseek,
2224 .release = single_release_net,
2225 };
2226 #endif
2227
2228 /*
2229 * Set timeout values for tcp tcpfin udp in the timeout_table.
2230 */
2231 static int ip_vs_set_timeout(struct net *net, struct ip_vs_timeout_user *u)
2232 {
2233 #if defined(CONFIG_IP_VS_PROTO_TCP) || defined(CONFIG_IP_VS_PROTO_UDP)
2234 struct ip_vs_proto_data *pd;
2235 #endif
2236
2237 IP_VS_DBG(2, "Setting timeout tcp:%d tcpfin:%d udp:%d\n",
2238 u->tcp_timeout,
2239 u->tcp_fin_timeout,
2240 u->udp_timeout);
2241
2242 #ifdef CONFIG_IP_VS_PROTO_TCP
2243 if (u->tcp_timeout) {
2244 pd = ip_vs_proto_data_get(net, IPPROTO_TCP);
2245 pd->timeout_table[IP_VS_TCP_S_ESTABLISHED]
2246 = u->tcp_timeout * HZ;
2247 }
2248
2249 if (u->tcp_fin_timeout) {
2250 pd = ip_vs_proto_data_get(net, IPPROTO_TCP);
2251 pd->timeout_table[IP_VS_TCP_S_FIN_WAIT]
2252 = u->tcp_fin_timeout * HZ;
2253 }
2254 #endif
2255
2256 #ifdef CONFIG_IP_VS_PROTO_UDP
2257 if (u->udp_timeout) {
2258 pd = ip_vs_proto_data_get(net, IPPROTO_UDP);
2259 pd->timeout_table[IP_VS_UDP_S_NORMAL]
2260 = u->udp_timeout * HZ;
2261 }
2262 #endif
2263 return 0;
2264 }
2265
2266
2267 #define SET_CMDID(cmd) (cmd - IP_VS_BASE_CTL)
2268 #define SERVICE_ARG_LEN (sizeof(struct ip_vs_service_user))
2269 #define SVCDEST_ARG_LEN (sizeof(struct ip_vs_service_user) + \
2270 sizeof(struct ip_vs_dest_user))
2271 #define TIMEOUT_ARG_LEN (sizeof(struct ip_vs_timeout_user))
2272 #define DAEMON_ARG_LEN (sizeof(struct ip_vs_daemon_user))
2273 #define MAX_ARG_LEN SVCDEST_ARG_LEN
2274
2275 static const unsigned char set_arglen[SET_CMDID(IP_VS_SO_SET_MAX)+1] = {
2276 [SET_CMDID(IP_VS_SO_SET_ADD)] = SERVICE_ARG_LEN,
2277 [SET_CMDID(IP_VS_SO_SET_EDIT)] = SERVICE_ARG_LEN,
2278 [SET_CMDID(IP_VS_SO_SET_DEL)] = SERVICE_ARG_LEN,
2279 [SET_CMDID(IP_VS_SO_SET_FLUSH)] = 0,
2280 [SET_CMDID(IP_VS_SO_SET_ADDDEST)] = SVCDEST_ARG_LEN,
2281 [SET_CMDID(IP_VS_SO_SET_DELDEST)] = SVCDEST_ARG_LEN,
2282 [SET_CMDID(IP_VS_SO_SET_EDITDEST)] = SVCDEST_ARG_LEN,
2283 [SET_CMDID(IP_VS_SO_SET_TIMEOUT)] = TIMEOUT_ARG_LEN,
2284 [SET_CMDID(IP_VS_SO_SET_STARTDAEMON)] = DAEMON_ARG_LEN,
2285 [SET_CMDID(IP_VS_SO_SET_STOPDAEMON)] = DAEMON_ARG_LEN,
2286 [SET_CMDID(IP_VS_SO_SET_ZERO)] = SERVICE_ARG_LEN,
2287 };
2288
2289 static void ip_vs_copy_usvc_compat(struct ip_vs_service_user_kern *usvc,
2290 struct ip_vs_service_user *usvc_compat)
2291 {
2292 memset(usvc, 0, sizeof(*usvc));
2293
2294 usvc->af = AF_INET;
2295 usvc->protocol = usvc_compat->protocol;
2296 usvc->addr.ip = usvc_compat->addr;
2297 usvc->port = usvc_compat->port;
2298 usvc->fwmark = usvc_compat->fwmark;
2299
2300 /* Deep copy of sched_name is not needed here */
2301 usvc->sched_name = usvc_compat->sched_name;
2302
2303 usvc->flags = usvc_compat->flags;
2304 usvc->timeout = usvc_compat->timeout;
2305 usvc->netmask = usvc_compat->netmask;
2306 }
2307
2308 static void ip_vs_copy_udest_compat(struct ip_vs_dest_user_kern *udest,
2309 struct ip_vs_dest_user *udest_compat)
2310 {
2311 memset(udest, 0, sizeof(*udest));
2312
2313 udest->addr.ip = udest_compat->addr;
2314 udest->port = udest_compat->port;
2315 udest->conn_flags = udest_compat->conn_flags;
2316 udest->weight = udest_compat->weight;
2317 udest->u_threshold = udest_compat->u_threshold;
2318 udest->l_threshold = udest_compat->l_threshold;
2319 }
2320
2321 static int
2322 do_ip_vs_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len)
2323 {
2324 struct net *net = sock_net(sk);
2325 int ret;
2326 unsigned char arg[MAX_ARG_LEN];
2327 struct ip_vs_service_user *usvc_compat;
2328 struct ip_vs_service_user_kern usvc;
2329 struct ip_vs_service *svc;
2330 struct ip_vs_dest_user *udest_compat;
2331 struct ip_vs_dest_user_kern udest;
2332 struct netns_ipvs *ipvs = net_ipvs(net);
2333
2334 if (!capable(CAP_NET_ADMIN))
2335 return -EPERM;
2336
2337 if (cmd < IP_VS_BASE_CTL || cmd > IP_VS_SO_SET_MAX)
2338 return -EINVAL;
2339 if (len < 0 || len > MAX_ARG_LEN)
2340 return -EINVAL;
2341 if (len != set_arglen[SET_CMDID(cmd)]) {
2342 pr_err("set_ctl: len %u != %u\n",
2343 len, set_arglen[SET_CMDID(cmd)]);
2344 return -EINVAL;
2345 }
2346
2347 if (copy_from_user(arg, user, len) != 0)
2348 return -EFAULT;
2349
2350 /* increase the module use count */
2351 ip_vs_use_count_inc();
2352
2353 /* Handle daemons since they have another lock */
2354 if (cmd == IP_VS_SO_SET_STARTDAEMON ||
2355 cmd == IP_VS_SO_SET_STOPDAEMON) {
2356 struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg;
2357
2358 if (mutex_lock_interruptible(&ipvs->sync_mutex)) {
2359 ret = -ERESTARTSYS;
2360 goto out_dec;
2361 }
2362 if (cmd == IP_VS_SO_SET_STARTDAEMON)
2363 ret = start_sync_thread(net, dm->state, dm->mcast_ifn,
2364 dm->syncid);
2365 else
2366 ret = stop_sync_thread(net, dm->state);
2367 mutex_unlock(&ipvs->sync_mutex);
2368 goto out_dec;
2369 }
2370
2371 if (mutex_lock_interruptible(&__ip_vs_mutex)) {
2372 ret = -ERESTARTSYS;
2373 goto out_dec;
2374 }
2375
2376 if (cmd == IP_VS_SO_SET_FLUSH) {
2377 /* Flush the virtual service */
2378 ret = ip_vs_flush(net);
2379 goto out_unlock;
2380 } else if (cmd == IP_VS_SO_SET_TIMEOUT) {
2381 /* Set timeout values for (tcp tcpfin udp) */
2382 ret = ip_vs_set_timeout(net, (struct ip_vs_timeout_user *)arg);
2383 goto out_unlock;
2384 }
2385
2386 usvc_compat = (struct ip_vs_service_user *)arg;
2387 udest_compat = (struct ip_vs_dest_user *)(usvc_compat + 1);
2388
2389 /* We only use the new structs internally, so copy userspace compat
2390 * structs to extended internal versions */
2391 ip_vs_copy_usvc_compat(&usvc, usvc_compat);
2392 ip_vs_copy_udest_compat(&udest, udest_compat);
2393
2394 if (cmd == IP_VS_SO_SET_ZERO) {
2395 /* if no service address is set, zero counters in all */
2396 if (!usvc.fwmark && !usvc.addr.ip && !usvc.port) {
2397 ret = ip_vs_zero_all(net);
2398 goto out_unlock;
2399 }
2400 }
2401
2402 /* Check for valid protocol: TCP or UDP or SCTP, even for fwmark!=0 */
2403 if (usvc.protocol != IPPROTO_TCP && usvc.protocol != IPPROTO_UDP &&
2404 usvc.protocol != IPPROTO_SCTP) {
2405 pr_err("set_ctl: invalid protocol: %d %pI4:%d %s\n",
2406 usvc.protocol, &usvc.addr.ip,
2407 ntohs(usvc.port), usvc.sched_name);
2408 ret = -EFAULT;
2409 goto out_unlock;
2410 }
2411
2412 /* Lookup the exact service by <protocol, addr, port> or fwmark */
2413 if (usvc.fwmark == 0)
2414 svc = __ip_vs_service_find(net, usvc.af, usvc.protocol,
2415 &usvc.addr, usvc.port);
2416 else
2417 svc = __ip_vs_svc_fwm_find(net, usvc.af, usvc.fwmark);
2418
2419 if (cmd != IP_VS_SO_SET_ADD
2420 && (svc == NULL || svc->protocol != usvc.protocol)) {
2421 ret = -ESRCH;
2422 goto out_unlock;
2423 }
2424
2425 switch (cmd) {
2426 case IP_VS_SO_SET_ADD:
2427 if (svc != NULL)
2428 ret = -EEXIST;
2429 else
2430 ret = ip_vs_add_service(net, &usvc, &svc);
2431 break;
2432 case IP_VS_SO_SET_EDIT:
2433 ret = ip_vs_edit_service(svc, &usvc);
2434 break;
2435 case IP_VS_SO_SET_DEL:
2436 ret = ip_vs_del_service(svc);
2437 if (!ret)
2438 goto out_unlock;
2439 break;
2440 case IP_VS_SO_SET_ZERO:
2441 ret = ip_vs_zero_service(svc);
2442 break;
2443 case IP_VS_SO_SET_ADDDEST:
2444 ret = ip_vs_add_dest(svc, &udest);
2445 break;
2446 case IP_VS_SO_SET_EDITDEST:
2447 ret = ip_vs_edit_dest(svc, &udest);
2448 break;
2449 case IP_VS_SO_SET_DELDEST:
2450 ret = ip_vs_del_dest(svc, &udest);
2451 break;
2452 default:
2453 ret = -EINVAL;
2454 }
2455
2456 out_unlock:
2457 mutex_unlock(&__ip_vs_mutex);
2458 out_dec:
2459 /* decrease the module use count */
2460 ip_vs_use_count_dec();
2461
2462 return ret;
2463 }
2464
2465
2466 static void
2467 ip_vs_copy_service(struct ip_vs_service_entry *dst, struct ip_vs_service *src)
2468 {
2469 dst->protocol = src->protocol;
2470 dst->addr = src->addr.ip;
2471 dst->port = src->port;
2472 dst->fwmark = src->fwmark;
2473 strlcpy(dst->sched_name, src->scheduler->name, sizeof(dst->sched_name));
2474 dst->flags = src->flags;
2475 dst->timeout = src->timeout / HZ;
2476 dst->netmask = src->netmask;
2477 dst->num_dests = src->num_dests;
2478 ip_vs_copy_stats(&dst->stats, &src->stats);
2479 }
2480
2481 static inline int
2482 __ip_vs_get_service_entries(struct net *net,
2483 const struct ip_vs_get_services *get,
2484 struct ip_vs_get_services __user *uptr)
2485 {
2486 int idx, count=0;
2487 struct ip_vs_service *svc;
2488 struct ip_vs_service_entry entry;
2489 int ret = 0;
2490
2491 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
2492 list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
2493 /* Only expose IPv4 entries to old interface */
2494 if (svc->af != AF_INET || !net_eq(svc->net, net))
2495 continue;
2496
2497 if (count >= get->num_services)
2498 goto out;
2499 memset(&entry, 0, sizeof(entry));
2500 ip_vs_copy_service(&entry, svc);
2501 if (copy_to_user(&uptr->entrytable[count],
2502 &entry, sizeof(entry))) {
2503 ret = -EFAULT;
2504 goto out;
2505 }
2506 count++;
2507 }
2508 }
2509
2510 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
2511 list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
2512 /* Only expose IPv4 entries to old interface */
2513 if (svc->af != AF_INET || !net_eq(svc->net, net))
2514 continue;
2515
2516 if (count >= get->num_services)
2517 goto out;
2518 memset(&entry, 0, sizeof(entry));
2519 ip_vs_copy_service(&entry, svc);
2520 if (copy_to_user(&uptr->entrytable[count],
2521 &entry, sizeof(entry))) {
2522 ret = -EFAULT;
2523 goto out;
2524 }
2525 count++;
2526 }
2527 }
2528 out:
2529 return ret;
2530 }
2531
2532 static inline int
2533 __ip_vs_get_dest_entries(struct net *net, const struct ip_vs_get_dests *get,
2534 struct ip_vs_get_dests __user *uptr)
2535 {
2536 struct ip_vs_service *svc;
2537 union nf_inet_addr addr = { .ip = get->addr };
2538 int ret = 0;
2539
2540 if (get->fwmark)
2541 svc = __ip_vs_svc_fwm_find(net, AF_INET, get->fwmark);
2542 else
2543 svc = __ip_vs_service_find(net, AF_INET, get->protocol, &addr,
2544 get->port);
2545
2546 if (svc) {
2547 int count = 0;
2548 struct ip_vs_dest *dest;
2549 struct ip_vs_dest_entry entry;
2550
2551 list_for_each_entry(dest, &svc->destinations, n_list) {
2552 if (count >= get->num_dests)
2553 break;
2554
2555 entry.addr = dest->addr.ip;
2556 entry.port = dest->port;
2557 entry.conn_flags = atomic_read(&dest->conn_flags);
2558 entry.weight = atomic_read(&dest->weight);
2559 entry.u_threshold = dest->u_threshold;
2560 entry.l_threshold = dest->l_threshold;
2561 entry.activeconns = atomic_read(&dest->activeconns);
2562 entry.inactconns = atomic_read(&dest->inactconns);
2563 entry.persistconns = atomic_read(&dest->persistconns);
2564 ip_vs_copy_stats(&entry.stats, &dest->stats);
2565 if (copy_to_user(&uptr->entrytable[count],
2566 &entry, sizeof(entry))) {
2567 ret = -EFAULT;
2568 break;
2569 }
2570 count++;
2571 }
2572 } else
2573 ret = -ESRCH;
2574 return ret;
2575 }
2576
2577 static inline void
2578 __ip_vs_get_timeouts(struct net *net, struct ip_vs_timeout_user *u)
2579 {
2580 #if defined(CONFIG_IP_VS_PROTO_TCP) || defined(CONFIG_IP_VS_PROTO_UDP)
2581 struct ip_vs_proto_data *pd;
2582 #endif
2583
2584 #ifdef CONFIG_IP_VS_PROTO_TCP
2585 pd = ip_vs_proto_data_get(net, IPPROTO_TCP);
2586 u->tcp_timeout = pd->timeout_table[IP_VS_TCP_S_ESTABLISHED] / HZ;
2587 u->tcp_fin_timeout = pd->timeout_table[IP_VS_TCP_S_FIN_WAIT] / HZ;
2588 #endif
2589 #ifdef CONFIG_IP_VS_PROTO_UDP
2590 pd = ip_vs_proto_data_get(net, IPPROTO_UDP);
2591 u->udp_timeout =
2592 pd->timeout_table[IP_VS_UDP_S_NORMAL] / HZ;
2593 #endif
2594 }
2595
2596
2597 #define GET_CMDID(cmd) (cmd - IP_VS_BASE_CTL)
2598 #define GET_INFO_ARG_LEN (sizeof(struct ip_vs_getinfo))
2599 #define GET_SERVICES_ARG_LEN (sizeof(struct ip_vs_get_services))
2600 #define GET_SERVICE_ARG_LEN (sizeof(struct ip_vs_service_entry))
2601 #define GET_DESTS_ARG_LEN (sizeof(struct ip_vs_get_dests))
2602 #define GET_TIMEOUT_ARG_LEN (sizeof(struct ip_vs_timeout_user))
2603 #define GET_DAEMON_ARG_LEN (sizeof(struct ip_vs_daemon_user) * 2)
2604
2605 static const unsigned char get_arglen[GET_CMDID(IP_VS_SO_GET_MAX)+1] = {
2606 [GET_CMDID(IP_VS_SO_GET_VERSION)] = 64,
2607 [GET_CMDID(IP_VS_SO_GET_INFO)] = GET_INFO_ARG_LEN,
2608 [GET_CMDID(IP_VS_SO_GET_SERVICES)] = GET_SERVICES_ARG_LEN,
2609 [GET_CMDID(IP_VS_SO_GET_SERVICE)] = GET_SERVICE_ARG_LEN,
2610 [GET_CMDID(IP_VS_SO_GET_DESTS)] = GET_DESTS_ARG_LEN,
2611 [GET_CMDID(IP_VS_SO_GET_TIMEOUT)] = GET_TIMEOUT_ARG_LEN,
2612 [GET_CMDID(IP_VS_SO_GET_DAEMON)] = GET_DAEMON_ARG_LEN,
2613 };
2614
2615 static int
2616 do_ip_vs_get_ctl(struct sock *sk, int cmd, void __user *user, int *len)
2617 {
2618 unsigned char arg[128];
2619 int ret = 0;
2620 unsigned int copylen;
2621 struct net *net = sock_net(sk);
2622 struct netns_ipvs *ipvs = net_ipvs(net);
2623
2624 BUG_ON(!net);
2625 if (!capable(CAP_NET_ADMIN))
2626 return -EPERM;
2627
2628 if (cmd < IP_VS_BASE_CTL || cmd > IP_VS_SO_GET_MAX)
2629 return -EINVAL;
2630
2631 if (*len < get_arglen[GET_CMDID(cmd)]) {
2632 pr_err("get_ctl: len %u < %u\n",
2633 *len, get_arglen[GET_CMDID(cmd)]);
2634 return -EINVAL;
2635 }
2636
2637 copylen = get_arglen[GET_CMDID(cmd)];
2638 if (copylen > 128)
2639 return -EINVAL;
2640
2641 if (copy_from_user(arg, user, copylen) != 0)
2642 return -EFAULT;
2643 /*
2644 * Handle daemons first since it has its own locking
2645 */
2646 if (cmd == IP_VS_SO_GET_DAEMON) {
2647 struct ip_vs_daemon_user d[2];
2648
2649 memset(&d, 0, sizeof(d));
2650 if (mutex_lock_interruptible(&ipvs->sync_mutex))
2651 return -ERESTARTSYS;
2652
2653 if (ipvs->sync_state & IP_VS_STATE_MASTER) {
2654 d[0].state = IP_VS_STATE_MASTER;
2655 strlcpy(d[0].mcast_ifn, ipvs->master_mcast_ifn,
2656 sizeof(d[0].mcast_ifn));
2657 d[0].syncid = ipvs->master_syncid;
2658 }
2659 if (ipvs->sync_state & IP_VS_STATE_BACKUP) {
2660 d[1].state = IP_VS_STATE_BACKUP;
2661 strlcpy(d[1].mcast_ifn, ipvs->backup_mcast_ifn,
2662 sizeof(d[1].mcast_ifn));
2663 d[1].syncid = ipvs->backup_syncid;
2664 }
2665 if (copy_to_user(user, &d, sizeof(d)) != 0)
2666 ret = -EFAULT;
2667 mutex_unlock(&ipvs->sync_mutex);
2668 return ret;
2669 }
2670
2671 if (mutex_lock_interruptible(&__ip_vs_mutex))
2672 return -ERESTARTSYS;
2673
2674 switch (cmd) {
2675 case IP_VS_SO_GET_VERSION:
2676 {
2677 char buf[64];
2678
2679 sprintf(buf, "IP Virtual Server version %d.%d.%d (size=%d)",
2680 NVERSION(IP_VS_VERSION_CODE), ip_vs_conn_tab_size);
2681 if (copy_to_user(user, buf, strlen(buf)+1) != 0) {
2682 ret = -EFAULT;
2683 goto out;
2684 }
2685 *len = strlen(buf)+1;
2686 }
2687 break;
2688
2689 case IP_VS_SO_GET_INFO:
2690 {
2691 struct ip_vs_getinfo info;
2692 info.version = IP_VS_VERSION_CODE;
2693 info.size = ip_vs_conn_tab_size;
2694 info.num_services = ipvs->num_services;
2695 if (copy_to_user(user, &info, sizeof(info)) != 0)
2696 ret = -EFAULT;
2697 }
2698 break;
2699
2700 case IP_VS_SO_GET_SERVICES:
2701 {
2702 struct ip_vs_get_services *get;
2703 int size;
2704
2705 get = (struct ip_vs_get_services *)arg;
2706 size = sizeof(*get) +
2707 sizeof(struct ip_vs_service_entry) * get->num_services;
2708 if (*len != size) {
2709 pr_err("length: %u != %u\n", *len, size);
2710 ret = -EINVAL;
2711 goto out;
2712 }
2713 ret = __ip_vs_get_service_entries(net, get, user);
2714 }
2715 break;
2716
2717 case IP_VS_SO_GET_SERVICE:
2718 {
2719 struct ip_vs_service_entry *entry;
2720 struct ip_vs_service *svc;
2721 union nf_inet_addr addr;
2722
2723 entry = (struct ip_vs_service_entry *)arg;
2724 addr.ip = entry->addr;
2725 if (entry->fwmark)
2726 svc = __ip_vs_svc_fwm_find(net, AF_INET, entry->fwmark);
2727 else
2728 svc = __ip_vs_service_find(net, AF_INET,
2729 entry->protocol, &addr,
2730 entry->port);
2731 if (svc) {
2732 ip_vs_copy_service(entry, svc);
2733 if (copy_to_user(user, entry, sizeof(*entry)) != 0)
2734 ret = -EFAULT;
2735 } else
2736 ret = -ESRCH;
2737 }
2738 break;
2739
2740 case IP_VS_SO_GET_DESTS:
2741 {
2742 struct ip_vs_get_dests *get;
2743 int size;
2744
2745 get = (struct ip_vs_get_dests *)arg;
2746 size = sizeof(*get) +
2747 sizeof(struct ip_vs_dest_entry) * get->num_dests;
2748 if (*len != size) {
2749 pr_err("length: %u != %u\n", *len, size);
2750 ret = -EINVAL;
2751 goto out;
2752 }
2753 ret = __ip_vs_get_dest_entries(net, get, user);
2754 }
2755 break;
2756
2757 case IP_VS_SO_GET_TIMEOUT:
2758 {
2759 struct ip_vs_timeout_user t;
2760
2761 __ip_vs_get_timeouts(net, &t);
2762 if (copy_to_user(user, &t, sizeof(t)) != 0)
2763 ret = -EFAULT;
2764 }
2765 break;
2766
2767 default:
2768 ret = -EINVAL;
2769 }
2770
2771 out:
2772 mutex_unlock(&__ip_vs_mutex);
2773 return ret;
2774 }
2775
2776
2777 static struct nf_sockopt_ops ip_vs_sockopts = {
2778 .pf = PF_INET,
2779 .set_optmin = IP_VS_BASE_CTL,
2780 .set_optmax = IP_VS_SO_SET_MAX+1,
2781 .set = do_ip_vs_set_ctl,
2782 .get_optmin = IP_VS_BASE_CTL,
2783 .get_optmax = IP_VS_SO_GET_MAX+1,
2784 .get = do_ip_vs_get_ctl,
2785 .owner = THIS_MODULE,
2786 };
2787
2788 /*
2789 * Generic Netlink interface
2790 */
2791
2792 /* IPVS genetlink family */
2793 static struct genl_family ip_vs_genl_family = {
2794 .id = GENL_ID_GENERATE,
2795 .hdrsize = 0,
2796 .name = IPVS_GENL_NAME,
2797 .version = IPVS_GENL_VERSION,
2798 .maxattr = IPVS_CMD_MAX,
2799 .netnsok = true, /* Make ipvsadm to work on netns */
2800 };
2801
2802 /* Policy used for first-level command attributes */
2803 static const struct nla_policy ip_vs_cmd_policy[IPVS_CMD_ATTR_MAX + 1] = {
2804 [IPVS_CMD_ATTR_SERVICE] = { .type = NLA_NESTED },
2805 [IPVS_CMD_ATTR_DEST] = { .type = NLA_NESTED },
2806 [IPVS_CMD_ATTR_DAEMON] = { .type = NLA_NESTED },
2807 [IPVS_CMD_ATTR_TIMEOUT_TCP] = { .type = NLA_U32 },
2808 [IPVS_CMD_ATTR_TIMEOUT_TCP_FIN] = { .type = NLA_U32 },
2809 [IPVS_CMD_ATTR_TIMEOUT_UDP] = { .type = NLA_U32 },
2810 };
2811
2812 /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DAEMON */
2813 static const struct nla_policy ip_vs_daemon_policy[IPVS_DAEMON_ATTR_MAX + 1] = {
2814 [IPVS_DAEMON_ATTR_STATE] = { .type = NLA_U32 },
2815 [IPVS_DAEMON_ATTR_MCAST_IFN] = { .type = NLA_NUL_STRING,
2816 .len = IP_VS_IFNAME_MAXLEN },
2817 [IPVS_DAEMON_ATTR_SYNC_ID] = { .type = NLA_U32 },
2818 };
2819
2820 /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_SERVICE */
2821 static const struct nla_policy ip_vs_svc_policy[IPVS_SVC_ATTR_MAX + 1] = {
2822 [IPVS_SVC_ATTR_AF] = { .type = NLA_U16 },
2823 [IPVS_SVC_ATTR_PROTOCOL] = { .type = NLA_U16 },
2824 [IPVS_SVC_ATTR_ADDR] = { .type = NLA_BINARY,
2825 .len = sizeof(union nf_inet_addr) },
2826 [IPVS_SVC_ATTR_PORT] = { .type = NLA_U16 },
2827 [IPVS_SVC_ATTR_FWMARK] = { .type = NLA_U32 },
2828 [IPVS_SVC_ATTR_SCHED_NAME] = { .type = NLA_NUL_STRING,
2829 .len = IP_VS_SCHEDNAME_MAXLEN },
2830 [IPVS_SVC_ATTR_PE_NAME] = { .type = NLA_NUL_STRING,
2831 .len = IP_VS_PENAME_MAXLEN },
2832 [IPVS_SVC_ATTR_FLAGS] = { .type = NLA_BINARY,
2833 .len = sizeof(struct ip_vs_flags) },
2834 [IPVS_SVC_ATTR_TIMEOUT] = { .type = NLA_U32 },
2835 [IPVS_SVC_ATTR_NETMASK] = { .type = NLA_U32 },
2836 [IPVS_SVC_ATTR_STATS] = { .type = NLA_NESTED },
2837 };
2838
2839 /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DEST */
2840 static const struct nla_policy ip_vs_dest_policy[IPVS_DEST_ATTR_MAX + 1] = {
2841 [IPVS_DEST_ATTR_ADDR] = { .type = NLA_BINARY,
2842 .len = sizeof(union nf_inet_addr) },
2843 [IPVS_DEST_ATTR_PORT] = { .type = NLA_U16 },
2844 [IPVS_DEST_ATTR_FWD_METHOD] = { .type = NLA_U32 },
2845 [IPVS_DEST_ATTR_WEIGHT] = { .type = NLA_U32 },
2846 [IPVS_DEST_ATTR_U_THRESH] = { .type = NLA_U32 },
2847 [IPVS_DEST_ATTR_L_THRESH] = { .type = NLA_U32 },
2848 [IPVS_DEST_ATTR_ACTIVE_CONNS] = { .type = NLA_U32 },
2849 [IPVS_DEST_ATTR_INACT_CONNS] = { .type = NLA_U32 },
2850 [IPVS_DEST_ATTR_PERSIST_CONNS] = { .type = NLA_U32 },
2851 [IPVS_DEST_ATTR_STATS] = { .type = NLA_NESTED },
2852 };
2853
2854 static int ip_vs_genl_fill_stats(struct sk_buff *skb, int container_type,
2855 struct ip_vs_stats *stats)
2856 {
2857 struct ip_vs_stats_user ustats;
2858 struct nlattr *nl_stats = nla_nest_start(skb, container_type);
2859 if (!nl_stats)
2860 return -EMSGSIZE;
2861
2862 ip_vs_copy_stats(&ustats, stats);
2863
2864 if (nla_put_u32(skb, IPVS_STATS_ATTR_CONNS, ustats.conns) ||
2865 nla_put_u32(skb, IPVS_STATS_ATTR_INPKTS, ustats.inpkts) ||
2866 nla_put_u32(skb, IPVS_STATS_ATTR_OUTPKTS, ustats.outpkts) ||
2867 nla_put_u64(skb, IPVS_STATS_ATTR_INBYTES, ustats.inbytes) ||
2868 nla_put_u64(skb, IPVS_STATS_ATTR_OUTBYTES, ustats.outbytes) ||
2869 nla_put_u32(skb, IPVS_STATS_ATTR_CPS, ustats.cps) ||
2870 nla_put_u32(skb, IPVS_STATS_ATTR_INPPS, ustats.inpps) ||
2871 nla_put_u32(skb, IPVS_STATS_ATTR_OUTPPS, ustats.outpps) ||
2872 nla_put_u32(skb, IPVS_STATS_ATTR_INBPS, ustats.inbps) ||
2873 nla_put_u32(skb, IPVS_STATS_ATTR_OUTBPS, ustats.outbps))
2874 goto nla_put_failure;
2875 nla_nest_end(skb, nl_stats);
2876
2877 return 0;
2878
2879 nla_put_failure:
2880 nla_nest_cancel(skb, nl_stats);
2881 return -EMSGSIZE;
2882 }
2883
2884 static int ip_vs_genl_fill_service(struct sk_buff *skb,
2885 struct ip_vs_service *svc)
2886 {
2887 struct nlattr *nl_service;
2888 struct ip_vs_flags flags = { .flags = svc->flags,
2889 .mask = ~0 };
2890
2891 nl_service = nla_nest_start(skb, IPVS_CMD_ATTR_SERVICE);
2892 if (!nl_service)
2893 return -EMSGSIZE;
2894
2895 if (nla_put_u16(skb, IPVS_SVC_ATTR_AF, svc->af))
2896 goto nla_put_failure;
2897 if (svc->fwmark) {
2898 if (nla_put_u32(skb, IPVS_SVC_ATTR_FWMARK, svc->fwmark))
2899 goto nla_put_failure;
2900 } else {
2901 if (nla_put_u16(skb, IPVS_SVC_ATTR_PROTOCOL, svc->protocol) ||
2902 nla_put(skb, IPVS_SVC_ATTR_ADDR, sizeof(svc->addr), &svc->addr) ||
2903 nla_put_u16(skb, IPVS_SVC_ATTR_PORT, svc->port))
2904 goto nla_put_failure;
2905 }
2906
2907 if (nla_put_string(skb, IPVS_SVC_ATTR_SCHED_NAME, svc->scheduler->name) ||
2908 (svc->pe &&
2909 nla_put_string(skb, IPVS_SVC_ATTR_PE_NAME, svc->pe->name)) ||
2910 nla_put(skb, IPVS_SVC_ATTR_FLAGS, sizeof(flags), &flags) ||
2911 nla_put_u32(skb, IPVS_SVC_ATTR_TIMEOUT, svc->timeout / HZ) ||
2912 nla_put_u32(skb, IPVS_SVC_ATTR_NETMASK, svc->netmask))
2913 goto nla_put_failure;
2914 if (ip_vs_genl_fill_stats(skb, IPVS_SVC_ATTR_STATS, &svc->stats))
2915 goto nla_put_failure;
2916
2917 nla_nest_end(skb, nl_service);
2918
2919 return 0;
2920
2921 nla_put_failure:
2922 nla_nest_cancel(skb, nl_service);
2923 return -EMSGSIZE;
2924 }
2925
2926 static int ip_vs_genl_dump_service(struct sk_buff *skb,
2927 struct ip_vs_service *svc,
2928 struct netlink_callback *cb)
2929 {
2930 void *hdr;
2931
2932 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq,
2933 &ip_vs_genl_family, NLM_F_MULTI,
2934 IPVS_CMD_NEW_SERVICE);
2935 if (!hdr)
2936 return -EMSGSIZE;
2937
2938 if (ip_vs_genl_fill_service(skb, svc) < 0)
2939 goto nla_put_failure;
2940
2941 return genlmsg_end(skb, hdr);
2942
2943 nla_put_failure:
2944 genlmsg_cancel(skb, hdr);
2945 return -EMSGSIZE;
2946 }
2947
2948 static int ip_vs_genl_dump_services(struct sk_buff *skb,
2949 struct netlink_callback *cb)
2950 {
2951 int idx = 0, i;
2952 int start = cb->args[0];
2953 struct ip_vs_service *svc;
2954 struct net *net = skb_sknet(skb);
2955
2956 mutex_lock(&__ip_vs_mutex);
2957 for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) {
2958 list_for_each_entry(svc, &ip_vs_svc_table[i], s_list) {
2959 if (++idx <= start || !net_eq(svc->net, net))
2960 continue;
2961 if (ip_vs_genl_dump_service(skb, svc, cb) < 0) {
2962 idx--;
2963 goto nla_put_failure;
2964 }
2965 }
2966 }
2967
2968 for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) {
2969 list_for_each_entry(svc, &ip_vs_svc_fwm_table[i], f_list) {
2970 if (++idx <= start || !net_eq(svc->net, net))
2971 continue;
2972 if (ip_vs_genl_dump_service(skb, svc, cb) < 0) {
2973 idx--;
2974 goto nla_put_failure;
2975 }
2976 }
2977 }
2978
2979 nla_put_failure:
2980 mutex_unlock(&__ip_vs_mutex);
2981 cb->args[0] = idx;
2982
2983 return skb->len;
2984 }
2985
2986 static int ip_vs_genl_parse_service(struct net *net,
2987 struct ip_vs_service_user_kern *usvc,
2988 struct nlattr *nla, int full_entry,
2989 struct ip_vs_service **ret_svc)
2990 {
2991 struct nlattr *attrs[IPVS_SVC_ATTR_MAX + 1];
2992 struct nlattr *nla_af, *nla_port, *nla_fwmark, *nla_protocol, *nla_addr;
2993 struct ip_vs_service *svc;
2994
2995 /* Parse mandatory identifying service fields first */
2996 if (nla == NULL ||
2997 nla_parse_nested(attrs, IPVS_SVC_ATTR_MAX, nla, ip_vs_svc_policy))
2998 return -EINVAL;
2999
3000 nla_af = attrs[IPVS_SVC_ATTR_AF];
3001 nla_protocol = attrs[IPVS_SVC_ATTR_PROTOCOL];
3002 nla_addr = attrs[IPVS_SVC_ATTR_ADDR];
3003 nla_port = attrs[IPVS_SVC_ATTR_PORT];
3004 nla_fwmark = attrs[IPVS_SVC_ATTR_FWMARK];
3005
3006 if (!(nla_af && (nla_fwmark || (nla_port && nla_protocol && nla_addr))))
3007 return -EINVAL;
3008
3009 memset(usvc, 0, sizeof(*usvc));
3010
3011 usvc->af = nla_get_u16(nla_af);
3012 #ifdef CONFIG_IP_VS_IPV6
3013 if (usvc->af != AF_INET && usvc->af != AF_INET6)
3014 #else
3015 if (usvc->af != AF_INET)
3016 #endif
3017 return -EAFNOSUPPORT;
3018
3019 if (nla_fwmark) {
3020 usvc->protocol = IPPROTO_TCP;
3021 usvc->fwmark = nla_get_u32(nla_fwmark);
3022 } else {
3023 usvc->protocol = nla_get_u16(nla_protocol);
3024 nla_memcpy(&usvc->addr, nla_addr, sizeof(usvc->addr));
3025 usvc->port = nla_get_u16(nla_port);
3026 usvc->fwmark = 0;
3027 }
3028
3029 if (usvc->fwmark)
3030 svc = __ip_vs_svc_fwm_find(net, usvc->af, usvc->fwmark);
3031 else
3032 svc = __ip_vs_service_find(net, usvc->af, usvc->protocol,
3033 &usvc->addr, usvc->port);
3034 *ret_svc = svc;
3035
3036 /* If a full entry was requested, check for the additional fields */
3037 if (full_entry) {
3038 struct nlattr *nla_sched, *nla_flags, *nla_pe, *nla_timeout,
3039 *nla_netmask;
3040 struct ip_vs_flags flags;
3041
3042 nla_sched = attrs[IPVS_SVC_ATTR_SCHED_NAME];
3043 nla_pe = attrs[IPVS_SVC_ATTR_PE_NAME];
3044 nla_flags = attrs[IPVS_SVC_ATTR_FLAGS];
3045 nla_timeout = attrs[IPVS_SVC_ATTR_TIMEOUT];
3046 nla_netmask = attrs[IPVS_SVC_ATTR_NETMASK];
3047
3048 if (!(nla_sched && nla_flags && nla_timeout && nla_netmask))
3049 return -EINVAL;
3050
3051 nla_memcpy(&flags, nla_flags, sizeof(flags));
3052
3053 /* prefill flags from service if it already exists */
3054 if (svc)
3055 usvc->flags = svc->flags;
3056
3057 /* set new flags from userland */
3058 usvc->flags = (usvc->flags & ~flags.mask) |
3059 (flags.flags & flags.mask);
3060 usvc->sched_name = nla_data(nla_sched);
3061 usvc->pe_name = nla_pe ? nla_data(nla_pe) : NULL;
3062 usvc->timeout = nla_get_u32(nla_timeout);
3063 usvc->netmask = nla_get_u32(nla_netmask);
3064 }
3065
3066 return 0;
3067 }
3068
3069 static struct ip_vs_service *ip_vs_genl_find_service(struct net *net,
3070 struct nlattr *nla)
3071 {
3072 struct ip_vs_service_user_kern usvc;
3073 struct ip_vs_service *svc;
3074 int ret;
3075
3076 ret = ip_vs_genl_parse_service(net, &usvc, nla, 0, &svc);
3077 return ret ? ERR_PTR(ret) : svc;
3078 }
3079
3080 static int ip_vs_genl_fill_dest(struct sk_buff *skb, struct ip_vs_dest *dest)
3081 {
3082 struct nlattr *nl_dest;
3083
3084 nl_dest = nla_nest_start(skb, IPVS_CMD_ATTR_DEST);
3085 if (!nl_dest)
3086 return -EMSGSIZE;
3087
3088 if (nla_put(skb, IPVS_DEST_ATTR_ADDR, sizeof(dest->addr), &dest->addr) ||
3089 nla_put_u16(skb, IPVS_DEST_ATTR_PORT, dest->port) ||
3090 nla_put_u32(skb, IPVS_DEST_ATTR_FWD_METHOD,
3091 (atomic_read(&dest->conn_flags) &
3092 IP_VS_CONN_F_FWD_MASK)) ||
3093 nla_put_u32(skb, IPVS_DEST_ATTR_WEIGHT,
3094 atomic_read(&dest->weight)) ||
3095 nla_put_u32(skb, IPVS_DEST_ATTR_U_THRESH, dest->u_threshold) ||
3096 nla_put_u32(skb, IPVS_DEST_ATTR_L_THRESH, dest->l_threshold) ||
3097 nla_put_u32(skb, IPVS_DEST_ATTR_ACTIVE_CONNS,
3098 atomic_read(&dest->activeconns)) ||
3099 nla_put_u32(skb, IPVS_DEST_ATTR_INACT_CONNS,
3100 atomic_read(&dest->inactconns)) ||
3101 nla_put_u32(skb, IPVS_DEST_ATTR_PERSIST_CONNS,
3102 atomic_read(&dest->persistconns)))
3103 goto nla_put_failure;
3104 if (ip_vs_genl_fill_stats(skb, IPVS_DEST_ATTR_STATS, &dest->stats))
3105 goto nla_put_failure;
3106
3107 nla_nest_end(skb, nl_dest);
3108
3109 return 0;
3110
3111 nla_put_failure:
3112 nla_nest_cancel(skb, nl_dest);
3113 return -EMSGSIZE;
3114 }
3115
3116 static int ip_vs_genl_dump_dest(struct sk_buff *skb, struct ip_vs_dest *dest,
3117 struct netlink_callback *cb)
3118 {
3119 void *hdr;
3120
3121 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq,
3122 &ip_vs_genl_family, NLM_F_MULTI,
3123 IPVS_CMD_NEW_DEST);
3124 if (!hdr)
3125 return -EMSGSIZE;
3126
3127 if (ip_vs_genl_fill_dest(skb, dest) < 0)
3128 goto nla_put_failure;
3129
3130 return genlmsg_end(skb, hdr);
3131
3132 nla_put_failure:
3133 genlmsg_cancel(skb, hdr);
3134 return -EMSGSIZE;
3135 }
3136
3137 static int ip_vs_genl_dump_dests(struct sk_buff *skb,
3138 struct netlink_callback *cb)
3139 {
3140 int idx = 0;
3141 int start = cb->args[0];
3142 struct ip_vs_service *svc;
3143 struct ip_vs_dest *dest;
3144 struct nlattr *attrs[IPVS_CMD_ATTR_MAX + 1];
3145 struct net *net = skb_sknet(skb);
3146
3147 mutex_lock(&__ip_vs_mutex);
3148
3149 /* Try to find the service for which to dump destinations */
3150 if (nlmsg_parse(cb->nlh, GENL_HDRLEN, attrs,
3151 IPVS_CMD_ATTR_MAX, ip_vs_cmd_policy))
3152 goto out_err;
3153
3154
3155 svc = ip_vs_genl_find_service(net, attrs[IPVS_CMD_ATTR_SERVICE]);
3156 if (IS_ERR(svc) || svc == NULL)
3157 goto out_err;
3158
3159 /* Dump the destinations */
3160 list_for_each_entry(dest, &svc->destinations, n_list) {
3161 if (++idx <= start)
3162 continue;
3163 if (ip_vs_genl_dump_dest(skb, dest, cb) < 0) {
3164 idx--;
3165 goto nla_put_failure;
3166 }
3167 }
3168
3169 nla_put_failure:
3170 cb->args[0] = idx;
3171
3172 out_err:
3173 mutex_unlock(&__ip_vs_mutex);
3174
3175 return skb->len;
3176 }
3177
3178 static int ip_vs_genl_parse_dest(struct ip_vs_dest_user_kern *udest,
3179 struct nlattr *nla, int full_entry)
3180 {
3181 struct nlattr *attrs[IPVS_DEST_ATTR_MAX + 1];
3182 struct nlattr *nla_addr, *nla_port;
3183
3184 /* Parse mandatory identifying destination fields first */
3185 if (nla == NULL ||
3186 nla_parse_nested(attrs, IPVS_DEST_ATTR_MAX, nla, ip_vs_dest_policy))
3187 return -EINVAL;
3188
3189 nla_addr = attrs[IPVS_DEST_ATTR_ADDR];
3190 nla_port = attrs[IPVS_DEST_ATTR_PORT];
3191
3192 if (!(nla_addr && nla_port))
3193 return -EINVAL;
3194
3195 memset(udest, 0, sizeof(*udest));
3196
3197 nla_memcpy(&udest->addr, nla_addr, sizeof(udest->addr));
3198 udest->port = nla_get_u16(nla_port);
3199
3200 /* If a full entry was requested, check for the additional fields */
3201 if (full_entry) {
3202 struct nlattr *nla_fwd, *nla_weight, *nla_u_thresh,
3203 *nla_l_thresh;
3204
3205 nla_fwd = attrs[IPVS_DEST_ATTR_FWD_METHOD];
3206 nla_weight = attrs[IPVS_DEST_ATTR_WEIGHT];
3207 nla_u_thresh = attrs[IPVS_DEST_ATTR_U_THRESH];
3208 nla_l_thresh = attrs[IPVS_DEST_ATTR_L_THRESH];
3209
3210 if (!(nla_fwd && nla_weight && nla_u_thresh && nla_l_thresh))
3211 return -EINVAL;
3212
3213 udest->conn_flags = nla_get_u32(nla_fwd)
3214 & IP_VS_CONN_F_FWD_MASK;
3215 udest->weight = nla_get_u32(nla_weight);
3216 udest->u_threshold = nla_get_u32(nla_u_thresh);
3217 udest->l_threshold = nla_get_u32(nla_l_thresh);
3218 }
3219
3220 return 0;
3221 }
3222
3223 static int ip_vs_genl_fill_daemon(struct sk_buff *skb, __be32 state,
3224 const char *mcast_ifn, __be32 syncid)
3225 {
3226 struct nlattr *nl_daemon;
3227
3228 nl_daemon = nla_nest_start(skb, IPVS_CMD_ATTR_DAEMON);
3229 if (!nl_daemon)
3230 return -EMSGSIZE;
3231
3232 if (nla_put_u32(skb, IPVS_DAEMON_ATTR_STATE, state) ||
3233 nla_put_string(skb, IPVS_DAEMON_ATTR_MCAST_IFN, mcast_ifn) ||
3234 nla_put_u32(skb, IPVS_DAEMON_ATTR_SYNC_ID, syncid))
3235 goto nla_put_failure;
3236 nla_nest_end(skb, nl_daemon);
3237
3238 return 0;
3239
3240 nla_put_failure:
3241 nla_nest_cancel(skb, nl_daemon);
3242 return -EMSGSIZE;
3243 }
3244
3245 static int ip_vs_genl_dump_daemon(struct sk_buff *skb, __be32 state,
3246 const char *mcast_ifn, __be32 syncid,
3247 struct netlink_callback *cb)
3248 {
3249 void *hdr;
3250 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq,
3251 &ip_vs_genl_family, NLM_F_MULTI,
3252 IPVS_CMD_NEW_DAEMON);
3253 if (!hdr)
3254 return -EMSGSIZE;
3255
3256 if (ip_vs_genl_fill_daemon(skb, state, mcast_ifn, syncid))
3257 goto nla_put_failure;
3258
3259 return genlmsg_end(skb, hdr);
3260
3261 nla_put_failure:
3262 genlmsg_cancel(skb, hdr);
3263 return -EMSGSIZE;
3264 }
3265
3266 static int ip_vs_genl_dump_daemons(struct sk_buff *skb,
3267 struct netlink_callback *cb)
3268 {
3269 struct net *net = skb_sknet(skb);
3270 struct netns_ipvs *ipvs = net_ipvs(net);
3271
3272 mutex_lock(&ipvs->sync_mutex);
3273 if ((ipvs->sync_state & IP_VS_STATE_MASTER) && !cb->args[0]) {
3274 if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_MASTER,
3275 ipvs->master_mcast_ifn,
3276 ipvs->master_syncid, cb) < 0)
3277 goto nla_put_failure;
3278
3279 cb->args[0] = 1;
3280 }
3281
3282 if ((ipvs->sync_state & IP_VS_STATE_BACKUP) && !cb->args[1]) {
3283 if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_BACKUP,
3284 ipvs->backup_mcast_ifn,
3285 ipvs->backup_syncid, cb) < 0)
3286 goto nla_put_failure;
3287
3288 cb->args[1] = 1;
3289 }
3290
3291 nla_put_failure:
3292 mutex_unlock(&ipvs->sync_mutex);
3293
3294 return skb->len;
3295 }
3296
3297 static int ip_vs_genl_new_daemon(struct net *net, struct nlattr **attrs)
3298 {
3299 if (!(attrs[IPVS_DAEMON_ATTR_STATE] &&
3300 attrs[IPVS_DAEMON_ATTR_MCAST_IFN] &&
3301 attrs[IPVS_DAEMON_ATTR_SYNC_ID]))
3302 return -EINVAL;
3303
3304 return start_sync_thread(net,
3305 nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]),
3306 nla_data(attrs[IPVS_DAEMON_ATTR_MCAST_IFN]),
3307 nla_get_u32(attrs[IPVS_DAEMON_ATTR_SYNC_ID]));
3308 }
3309
3310 static int ip_vs_genl_del_daemon(struct net *net, struct nlattr **attrs)
3311 {
3312 if (!attrs[IPVS_DAEMON_ATTR_STATE])
3313 return -EINVAL;
3314
3315 return stop_sync_thread(net,
3316 nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]));
3317 }
3318
3319 static int ip_vs_genl_set_config(struct net *net, struct nlattr **attrs)
3320 {
3321 struct ip_vs_timeout_user t;
3322
3323 __ip_vs_get_timeouts(net, &t);
3324
3325 if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP])
3326 t.tcp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP]);
3327
3328 if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN])
3329 t.tcp_fin_timeout =
3330 nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN]);
3331
3332 if (attrs[IPVS_CMD_ATTR_TIMEOUT_UDP])
3333 t.udp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_UDP]);
3334
3335 return ip_vs_set_timeout(net, &t);
3336 }
3337
3338 static int ip_vs_genl_set_daemon(struct sk_buff *skb, struct genl_info *info)
3339 {
3340 int ret = 0, cmd;
3341 struct net *net;
3342 struct netns_ipvs *ipvs;
3343
3344 net = skb_sknet(skb);
3345 ipvs = net_ipvs(net);
3346 cmd = info->genlhdr->cmd;
3347
3348 if (cmd == IPVS_CMD_NEW_DAEMON || cmd == IPVS_CMD_DEL_DAEMON) {
3349 struct nlattr *daemon_attrs[IPVS_DAEMON_ATTR_MAX + 1];
3350
3351 mutex_lock(&ipvs->sync_mutex);
3352 if (!info->attrs[IPVS_CMD_ATTR_DAEMON] ||
3353 nla_parse_nested(daemon_attrs, IPVS_DAEMON_ATTR_MAX,
3354 info->attrs[IPVS_CMD_ATTR_DAEMON],
3355 ip_vs_daemon_policy)) {
3356 ret = -EINVAL;
3357 goto out;
3358 }
3359
3360 if (cmd == IPVS_CMD_NEW_DAEMON)
3361 ret = ip_vs_genl_new_daemon(net, daemon_attrs);
3362 else
3363 ret = ip_vs_genl_del_daemon(net, daemon_attrs);
3364 out:
3365 mutex_unlock(&ipvs->sync_mutex);
3366 }
3367 return ret;
3368 }
3369
3370 static int ip_vs_genl_set_cmd(struct sk_buff *skb, struct genl_info *info)
3371 {
3372 struct ip_vs_service *svc = NULL;
3373 struct ip_vs_service_user_kern usvc;
3374 struct ip_vs_dest_user_kern udest;
3375 int ret = 0, cmd;
3376 int need_full_svc = 0, need_full_dest = 0;
3377 struct net *net;
3378
3379 net = skb_sknet(skb);
3380 cmd = info->genlhdr->cmd;
3381
3382 mutex_lock(&__ip_vs_mutex);
3383
3384 if (cmd == IPVS_CMD_FLUSH) {
3385 ret = ip_vs_flush(net);
3386 goto out;
3387 } else if (cmd == IPVS_CMD_SET_CONFIG) {
3388 ret = ip_vs_genl_set_config(net, info->attrs);
3389 goto out;
3390 } else if (cmd == IPVS_CMD_ZERO &&
3391 !info->attrs[IPVS_CMD_ATTR_SERVICE]) {
3392 ret = ip_vs_zero_all(net);
3393 goto out;
3394 }
3395
3396 /* All following commands require a service argument, so check if we
3397 * received a valid one. We need a full service specification when
3398 * adding / editing a service. Only identifying members otherwise. */
3399 if (cmd == IPVS_CMD_NEW_SERVICE || cmd == IPVS_CMD_SET_SERVICE)
3400 need_full_svc = 1;
3401
3402 ret = ip_vs_genl_parse_service(net, &usvc,
3403 info->attrs[IPVS_CMD_ATTR_SERVICE],
3404 need_full_svc, &svc);
3405 if (ret)
3406 goto out;
3407
3408 /* Unless we're adding a new service, the service must already exist */
3409 if ((cmd != IPVS_CMD_NEW_SERVICE) && (svc == NULL)) {
3410 ret = -ESRCH;
3411 goto out;
3412 }
3413
3414 /* Destination commands require a valid destination argument. For
3415 * adding / editing a destination, we need a full destination
3416 * specification. */
3417 if (cmd == IPVS_CMD_NEW_DEST || cmd == IPVS_CMD_SET_DEST ||
3418 cmd == IPVS_CMD_DEL_DEST) {
3419 if (cmd != IPVS_CMD_DEL_DEST)
3420 need_full_dest = 1;
3421
3422 ret = ip_vs_genl_parse_dest(&udest,
3423 info->attrs[IPVS_CMD_ATTR_DEST],
3424 need_full_dest);
3425 if (ret)
3426 goto out;
3427 }
3428
3429 switch (cmd) {
3430 case IPVS_CMD_NEW_SERVICE:
3431 if (svc == NULL)
3432 ret = ip_vs_add_service(net, &usvc, &svc);
3433 else
3434 ret = -EEXIST;
3435 break;
3436 case IPVS_CMD_SET_SERVICE:
3437 ret = ip_vs_edit_service(svc, &usvc);
3438 break;
3439 case IPVS_CMD_DEL_SERVICE:
3440 ret = ip_vs_del_service(svc);
3441 /* do not use svc, it can be freed */
3442 break;
3443 case IPVS_CMD_NEW_DEST:
3444 ret = ip_vs_add_dest(svc, &udest);
3445 break;
3446 case IPVS_CMD_SET_DEST:
3447 ret = ip_vs_edit_dest(svc, &udest);
3448 break;
3449 case IPVS_CMD_DEL_DEST:
3450 ret = ip_vs_del_dest(svc, &udest);
3451 break;
3452 case IPVS_CMD_ZERO:
3453 ret = ip_vs_zero_service(svc);
3454 break;
3455 default:
3456 ret = -EINVAL;
3457 }
3458
3459 out:
3460 mutex_unlock(&__ip_vs_mutex);
3461
3462 return ret;
3463 }
3464
3465 static int ip_vs_genl_get_cmd(struct sk_buff *skb, struct genl_info *info)
3466 {
3467 struct sk_buff *msg;
3468 void *reply;
3469 int ret, cmd, reply_cmd;
3470 struct net *net;
3471
3472 net = skb_sknet(skb);
3473 cmd = info->genlhdr->cmd;
3474
3475 if (cmd == IPVS_CMD_GET_SERVICE)
3476 reply_cmd = IPVS_CMD_NEW_SERVICE;
3477 else if (cmd == IPVS_CMD_GET_INFO)
3478 reply_cmd = IPVS_CMD_SET_INFO;
3479 else if (cmd == IPVS_CMD_GET_CONFIG)
3480 reply_cmd = IPVS_CMD_SET_CONFIG;
3481 else {
3482 pr_err("unknown Generic Netlink command\n");
3483 return -EINVAL;
3484 }
3485
3486 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3487 if (!msg)
3488 return -ENOMEM;
3489
3490 mutex_lock(&__ip_vs_mutex);
3491
3492 reply = genlmsg_put_reply(msg, info, &ip_vs_genl_family, 0, reply_cmd);
3493 if (reply == NULL)
3494 goto nla_put_failure;
3495
3496 switch (cmd) {
3497 case IPVS_CMD_GET_SERVICE:
3498 {
3499 struct ip_vs_service *svc;
3500
3501 svc = ip_vs_genl_find_service(net,
3502 info->attrs[IPVS_CMD_ATTR_SERVICE]);
3503 if (IS_ERR(svc)) {
3504 ret = PTR_ERR(svc);
3505 goto out_err;
3506 } else if (svc) {
3507 ret = ip_vs_genl_fill_service(msg, svc);
3508 if (ret)
3509 goto nla_put_failure;
3510 } else {
3511 ret = -ESRCH;
3512 goto out_err;
3513 }
3514
3515 break;
3516 }
3517
3518 case IPVS_CMD_GET_CONFIG:
3519 {
3520 struct ip_vs_timeout_user t;
3521
3522 __ip_vs_get_timeouts(net, &t);
3523 #ifdef CONFIG_IP_VS_PROTO_TCP
3524 if (nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP,
3525 t.tcp_timeout) ||
3526 nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP_FIN,
3527 t.tcp_fin_timeout))
3528 goto nla_put_failure;
3529 #endif
3530 #ifdef CONFIG_IP_VS_PROTO_UDP
3531 if (nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_UDP, t.udp_timeout))
3532 goto nla_put_failure;
3533 #endif
3534
3535 break;
3536 }
3537
3538 case IPVS_CMD_GET_INFO:
3539 if (nla_put_u32(msg, IPVS_INFO_ATTR_VERSION,
3540 IP_VS_VERSION_CODE) ||
3541 nla_put_u32(msg, IPVS_INFO_ATTR_CONN_TAB_SIZE,
3542 ip_vs_conn_tab_size))
3543 goto nla_put_failure;
3544 break;
3545 }
3546
3547 genlmsg_end(msg, reply);
3548 ret = genlmsg_reply(msg, info);
3549 goto out;
3550
3551 nla_put_failure:
3552 pr_err("not enough space in Netlink message\n");
3553 ret = -EMSGSIZE;
3554
3555 out_err:
3556 nlmsg_free(msg);
3557 out:
3558 mutex_unlock(&__ip_vs_mutex);
3559
3560 return ret;
3561 }
3562
3563
3564 static struct genl_ops ip_vs_genl_ops[] __read_mostly = {
3565 {
3566 .cmd = IPVS_CMD_NEW_SERVICE,
3567 .flags = GENL_ADMIN_PERM,
3568 .policy = ip_vs_cmd_policy,
3569 .doit = ip_vs_genl_set_cmd,
3570 },
3571 {
3572 .cmd = IPVS_CMD_SET_SERVICE,
3573 .flags = GENL_ADMIN_PERM,
3574 .policy = ip_vs_cmd_policy,
3575 .doit = ip_vs_genl_set_cmd,
3576 },
3577 {
3578 .cmd = IPVS_CMD_DEL_SERVICE,
3579 .flags = GENL_ADMIN_PERM,
3580 .policy = ip_vs_cmd_policy,
3581 .doit = ip_vs_genl_set_cmd,
3582 },
3583 {
3584 .cmd = IPVS_CMD_GET_SERVICE,
3585 .flags = GENL_ADMIN_PERM,
3586 .doit = ip_vs_genl_get_cmd,
3587 .dumpit = ip_vs_genl_dump_services,
3588 .policy = ip_vs_cmd_policy,
3589 },
3590 {
3591 .cmd = IPVS_CMD_NEW_DEST,
3592 .flags = GENL_ADMIN_PERM,
3593 .policy = ip_vs_cmd_policy,
3594 .doit = ip_vs_genl_set_cmd,
3595 },
3596 {
3597 .cmd = IPVS_CMD_SET_DEST,
3598 .flags = GENL_ADMIN_PERM,
3599 .policy = ip_vs_cmd_policy,
3600 .doit = ip_vs_genl_set_cmd,
3601 },
3602 {
3603 .cmd = IPVS_CMD_DEL_DEST,
3604 .flags = GENL_ADMIN_PERM,
3605 .policy = ip_vs_cmd_policy,
3606 .doit = ip_vs_genl_set_cmd,
3607 },
3608 {
3609 .cmd = IPVS_CMD_GET_DEST,
3610 .flags = GENL_ADMIN_PERM,
3611 .policy = ip_vs_cmd_policy,
3612 .dumpit = ip_vs_genl_dump_dests,
3613 },
3614 {
3615 .cmd = IPVS_CMD_NEW_DAEMON,
3616 .flags = GENL_ADMIN_PERM,
3617 .policy = ip_vs_cmd_policy,
3618 .doit = ip_vs_genl_set_daemon,
3619 },
3620 {
3621 .cmd = IPVS_CMD_DEL_DAEMON,
3622 .flags = GENL_ADMIN_PERM,
3623 .policy = ip_vs_cmd_policy,
3624 .doit = ip_vs_genl_set_daemon,
3625 },
3626 {
3627 .cmd = IPVS_CMD_GET_DAEMON,
3628 .flags = GENL_ADMIN_PERM,
3629 .dumpit = ip_vs_genl_dump_daemons,
3630 },
3631 {
3632 .cmd = IPVS_CMD_SET_CONFIG,
3633 .flags = GENL_ADMIN_PERM,
3634 .policy = ip_vs_cmd_policy,
3635 .doit = ip_vs_genl_set_cmd,
3636 },
3637 {
3638 .cmd = IPVS_CMD_GET_CONFIG,
3639 .flags = GENL_ADMIN_PERM,
3640 .doit = ip_vs_genl_get_cmd,
3641 },
3642 {
3643 .cmd = IPVS_CMD_GET_INFO,
3644 .flags = GENL_ADMIN_PERM,
3645 .doit = ip_vs_genl_get_cmd,
3646 },
3647 {
3648 .cmd = IPVS_CMD_ZERO,
3649 .flags = GENL_ADMIN_PERM,
3650 .policy = ip_vs_cmd_policy,
3651 .doit = ip_vs_genl_set_cmd,
3652 },
3653 {
3654 .cmd = IPVS_CMD_FLUSH,
3655 .flags = GENL_ADMIN_PERM,
3656 .doit = ip_vs_genl_set_cmd,
3657 },
3658 };
3659
3660 static int __init ip_vs_genl_register(void)
3661 {
3662 return genl_register_family_with_ops(&ip_vs_genl_family,
3663 ip_vs_genl_ops, ARRAY_SIZE(ip_vs_genl_ops));
3664 }
3665
3666 static void ip_vs_genl_unregister(void)
3667 {
3668 genl_unregister_family(&ip_vs_genl_family);
3669 }
3670
3671 /* End of Generic Netlink interface definitions */
3672
3673 /*
3674 * per netns intit/exit func.
3675 */
3676 #ifdef CONFIG_SYSCTL
3677 int __net_init ip_vs_control_net_init_sysctl(struct net *net)
3678 {
3679 int idx;
3680 struct netns_ipvs *ipvs = net_ipvs(net);
3681 struct ctl_table *tbl;
3682
3683 atomic_set(&ipvs->dropentry, 0);
3684 spin_lock_init(&ipvs->dropentry_lock);
3685 spin_lock_init(&ipvs->droppacket_lock);
3686 spin_lock_init(&ipvs->securetcp_lock);
3687
3688 if (!net_eq(net, &init_net)) {
3689 tbl = kmemdup(vs_vars, sizeof(vs_vars), GFP_KERNEL);
3690 if (tbl == NULL)
3691 return -ENOMEM;
3692 } else
3693 tbl = vs_vars;
3694 /* Initialize sysctl defaults */
3695 idx = 0;
3696 ipvs->sysctl_amemthresh = 1024;
3697 tbl[idx++].data = &ipvs->sysctl_amemthresh;
3698 ipvs->sysctl_am_droprate = 10;
3699 tbl[idx++].data = &ipvs->sysctl_am_droprate;
3700 tbl[idx++].data = &ipvs->sysctl_drop_entry;
3701 tbl[idx++].data = &ipvs->sysctl_drop_packet;
3702 #ifdef CONFIG_IP_VS_NFCT
3703 tbl[idx++].data = &ipvs->sysctl_conntrack;
3704 #endif
3705 tbl[idx++].data = &ipvs->sysctl_secure_tcp;
3706 ipvs->sysctl_snat_reroute = 1;
3707 tbl[idx++].data = &ipvs->sysctl_snat_reroute;
3708 ipvs->sysctl_sync_ver = 1;
3709 tbl[idx++].data = &ipvs->sysctl_sync_ver;
3710 ipvs->sysctl_sync_ports = 1;
3711 tbl[idx++].data = &ipvs->sysctl_sync_ports;
3712 ipvs->sysctl_sync_qlen_max = nr_free_buffer_pages() / 32;
3713 tbl[idx++].data = &ipvs->sysctl_sync_qlen_max;
3714 ipvs->sysctl_sync_sock_size = 0;
3715 tbl[idx++].data = &ipvs->sysctl_sync_sock_size;
3716 tbl[idx++].data = &ipvs->sysctl_cache_bypass;
3717 tbl[idx++].data = &ipvs->sysctl_expire_nodest_conn;
3718 tbl[idx++].data = &ipvs->sysctl_expire_quiescent_template;
3719 ipvs->sysctl_sync_threshold[0] = DEFAULT_SYNC_THRESHOLD;
3720 ipvs->sysctl_sync_threshold[1] = DEFAULT_SYNC_PERIOD;
3721 tbl[idx].data = &ipvs->sysctl_sync_threshold;
3722 tbl[idx++].maxlen = sizeof(ipvs->sysctl_sync_threshold);
3723 ipvs->sysctl_sync_refresh_period = DEFAULT_SYNC_REFRESH_PERIOD;
3724 tbl[idx++].data = &ipvs->sysctl_sync_refresh_period;
3725 ipvs->sysctl_sync_retries = clamp_t(int, DEFAULT_SYNC_RETRIES, 0, 3);
3726 tbl[idx++].data = &ipvs->sysctl_sync_retries;
3727 tbl[idx++].data = &ipvs->sysctl_nat_icmp_send;
3728
3729
3730 ipvs->sysctl_hdr = register_net_sysctl(net, "net/ipv4/vs", tbl);
3731 if (ipvs->sysctl_hdr == NULL) {
3732 if (!net_eq(net, &init_net))
3733 kfree(tbl);
3734 return -ENOMEM;
3735 }
3736 ip_vs_start_estimator(net, &ipvs->tot_stats);
3737 ipvs->sysctl_tbl = tbl;
3738 /* Schedule defense work */
3739 INIT_DELAYED_WORK(&ipvs->defense_work, defense_work_handler);
3740 schedule_delayed_work(&ipvs->defense_work, DEFENSE_TIMER_PERIOD);
3741
3742 return 0;
3743 }
3744
3745 void __net_exit ip_vs_control_net_cleanup_sysctl(struct net *net)
3746 {
3747 struct netns_ipvs *ipvs = net_ipvs(net);
3748
3749 cancel_delayed_work_sync(&ipvs->defense_work);
3750 cancel_work_sync(&ipvs->defense_work.work);
3751 unregister_net_sysctl_table(ipvs->sysctl_hdr);
3752 }
3753
3754 #else
3755
3756 int __net_init ip_vs_control_net_init_sysctl(struct net *net) { return 0; }
3757 void __net_exit ip_vs_control_net_cleanup_sysctl(struct net *net) { }
3758
3759 #endif
3760
3761 static struct notifier_block ip_vs_dst_notifier = {
3762 .notifier_call = ip_vs_dst_event,
3763 };
3764
3765 int __net_init ip_vs_control_net_init(struct net *net)
3766 {
3767 int idx;
3768 struct netns_ipvs *ipvs = net_ipvs(net);
3769
3770 rwlock_init(&ipvs->rs_lock);
3771
3772 /* Initialize rs_table */
3773 for (idx = 0; idx < IP_VS_RTAB_SIZE; idx++)
3774 INIT_LIST_HEAD(&ipvs->rs_table[idx]);
3775
3776 INIT_LIST_HEAD(&ipvs->dest_trash);
3777 atomic_set(&ipvs->ftpsvc_counter, 0);
3778 atomic_set(&ipvs->nullsvc_counter, 0);
3779
3780 /* procfs stats */
3781 ipvs->tot_stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
3782 if (!ipvs->tot_stats.cpustats)
3783 return -ENOMEM;
3784
3785 spin_lock_init(&ipvs->tot_stats.lock);
3786
3787 proc_net_fops_create(net, "ip_vs", 0, &ip_vs_info_fops);
3788 proc_net_fops_create(net, "ip_vs_stats", 0, &ip_vs_stats_fops);
3789 proc_net_fops_create(net, "ip_vs_stats_percpu", 0,
3790 &ip_vs_stats_percpu_fops);
3791
3792 if (ip_vs_control_net_init_sysctl(net))
3793 goto err;
3794
3795 return 0;
3796
3797 err:
3798 free_percpu(ipvs->tot_stats.cpustats);
3799 return -ENOMEM;
3800 }
3801
3802 void __net_exit ip_vs_control_net_cleanup(struct net *net)
3803 {
3804 struct netns_ipvs *ipvs = net_ipvs(net);
3805
3806 ip_vs_trash_cleanup(net);
3807 ip_vs_stop_estimator(net, &ipvs->tot_stats);
3808 ip_vs_control_net_cleanup_sysctl(net);
3809 proc_net_remove(net, "ip_vs_stats_percpu");
3810 proc_net_remove(net, "ip_vs_stats");
3811 proc_net_remove(net, "ip_vs");
3812 free_percpu(ipvs->tot_stats.cpustats);
3813 }
3814
3815 int __init ip_vs_register_nl_ioctl(void)
3816 {
3817 int ret;
3818
3819 ret = nf_register_sockopt(&ip_vs_sockopts);
3820 if (ret) {
3821 pr_err("cannot register sockopt.\n");
3822 goto err_sock;
3823 }
3824
3825 ret = ip_vs_genl_register();
3826 if (ret) {
3827 pr_err("cannot register Generic Netlink interface.\n");
3828 goto err_genl;
3829 }
3830 return 0;
3831
3832 err_genl:
3833 nf_unregister_sockopt(&ip_vs_sockopts);
3834 err_sock:
3835 return ret;
3836 }
3837
3838 void ip_vs_unregister_nl_ioctl(void)
3839 {
3840 ip_vs_genl_unregister();
3841 nf_unregister_sockopt(&ip_vs_sockopts);
3842 }
3843
3844 int __init ip_vs_control_init(void)
3845 {
3846 int idx;
3847 int ret;
3848
3849 EnterFunction(2);
3850
3851 /* Initialize svc_table, ip_vs_svc_fwm_table, rs_table */
3852 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
3853 INIT_LIST_HEAD(&ip_vs_svc_table[idx]);
3854 INIT_LIST_HEAD(&ip_vs_svc_fwm_table[idx]);
3855 }
3856
3857 smp_wmb(); /* Do we really need it now ? */
3858
3859 ret = register_netdevice_notifier(&ip_vs_dst_notifier);
3860 if (ret < 0)
3861 return ret;
3862
3863 LeaveFunction(2);
3864 return 0;
3865 }
3866
3867
3868 void ip_vs_control_cleanup(void)
3869 {
3870 EnterFunction(2);
3871 unregister_netdevice_notifier(&ip_vs_dst_notifier);
3872 LeaveFunction(2);
3873 }
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