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ipvs: Pass ipvs not net to ip_vs_genl_del_daemon
[deliverable/linux.git] / net / netfilter / ipvs / ip_vs_ctl.c
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 /* sysctl variables */
59
60 #ifdef CONFIG_IP_VS_DEBUG
61 static int sysctl_ip_vs_debug_level = 0;
62
63 int ip_vs_get_debug_level(void)
64 {
65 return sysctl_ip_vs_debug_level;
66 }
67 #endif
68
69
70 /* Protos */
71 static void __ip_vs_del_service(struct ip_vs_service *svc, bool cleanup);
72
73
74 #ifdef CONFIG_IP_VS_IPV6
75 /* Taken from rt6_fill_node() in net/ipv6/route.c, is there a better way? */
76 static bool __ip_vs_addr_is_local_v6(struct net *net,
77 const struct in6_addr *addr)
78 {
79 struct flowi6 fl6 = {
80 .daddr = *addr,
81 };
82 struct dst_entry *dst = ip6_route_output(net, NULL, &fl6);
83 bool is_local;
84
85 is_local = !dst->error && dst->dev && (dst->dev->flags & IFF_LOOPBACK);
86
87 dst_release(dst);
88 return is_local;
89 }
90 #endif
91
92 #ifdef CONFIG_SYSCTL
93 /*
94 * update_defense_level is called from keventd and from sysctl,
95 * so it needs to protect itself from softirqs
96 */
97 static void update_defense_level(struct netns_ipvs *ipvs)
98 {
99 struct sysinfo i;
100 static int old_secure_tcp = 0;
101 int availmem;
102 int nomem;
103 int to_change = -1;
104
105 /* we only count free and buffered memory (in pages) */
106 si_meminfo(&i);
107 availmem = i.freeram + i.bufferram;
108 /* however in linux 2.5 the i.bufferram is total page cache size,
109 we need adjust it */
110 /* si_swapinfo(&i); */
111 /* availmem = availmem - (i.totalswap - i.freeswap); */
112
113 nomem = (availmem < ipvs->sysctl_amemthresh);
114
115 local_bh_disable();
116
117 /* drop_entry */
118 spin_lock(&ipvs->dropentry_lock);
119 switch (ipvs->sysctl_drop_entry) {
120 case 0:
121 atomic_set(&ipvs->dropentry, 0);
122 break;
123 case 1:
124 if (nomem) {
125 atomic_set(&ipvs->dropentry, 1);
126 ipvs->sysctl_drop_entry = 2;
127 } else {
128 atomic_set(&ipvs->dropentry, 0);
129 }
130 break;
131 case 2:
132 if (nomem) {
133 atomic_set(&ipvs->dropentry, 1);
134 } else {
135 atomic_set(&ipvs->dropentry, 0);
136 ipvs->sysctl_drop_entry = 1;
137 };
138 break;
139 case 3:
140 atomic_set(&ipvs->dropentry, 1);
141 break;
142 }
143 spin_unlock(&ipvs->dropentry_lock);
144
145 /* drop_packet */
146 spin_lock(&ipvs->droppacket_lock);
147 switch (ipvs->sysctl_drop_packet) {
148 case 0:
149 ipvs->drop_rate = 0;
150 break;
151 case 1:
152 if (nomem) {
153 ipvs->drop_rate = ipvs->drop_counter
154 = ipvs->sysctl_amemthresh /
155 (ipvs->sysctl_amemthresh-availmem);
156 ipvs->sysctl_drop_packet = 2;
157 } else {
158 ipvs->drop_rate = 0;
159 }
160 break;
161 case 2:
162 if (nomem) {
163 ipvs->drop_rate = ipvs->drop_counter
164 = ipvs->sysctl_amemthresh /
165 (ipvs->sysctl_amemthresh-availmem);
166 } else {
167 ipvs->drop_rate = 0;
168 ipvs->sysctl_drop_packet = 1;
169 }
170 break;
171 case 3:
172 ipvs->drop_rate = ipvs->sysctl_am_droprate;
173 break;
174 }
175 spin_unlock(&ipvs->droppacket_lock);
176
177 /* secure_tcp */
178 spin_lock(&ipvs->securetcp_lock);
179 switch (ipvs->sysctl_secure_tcp) {
180 case 0:
181 if (old_secure_tcp >= 2)
182 to_change = 0;
183 break;
184 case 1:
185 if (nomem) {
186 if (old_secure_tcp < 2)
187 to_change = 1;
188 ipvs->sysctl_secure_tcp = 2;
189 } else {
190 if (old_secure_tcp >= 2)
191 to_change = 0;
192 }
193 break;
194 case 2:
195 if (nomem) {
196 if (old_secure_tcp < 2)
197 to_change = 1;
198 } else {
199 if (old_secure_tcp >= 2)
200 to_change = 0;
201 ipvs->sysctl_secure_tcp = 1;
202 }
203 break;
204 case 3:
205 if (old_secure_tcp < 2)
206 to_change = 1;
207 break;
208 }
209 old_secure_tcp = ipvs->sysctl_secure_tcp;
210 if (to_change >= 0)
211 ip_vs_protocol_timeout_change(ipvs,
212 ipvs->sysctl_secure_tcp > 1);
213 spin_unlock(&ipvs->securetcp_lock);
214
215 local_bh_enable();
216 }
217
218
219 /*
220 * Timer for checking the defense
221 */
222 #define DEFENSE_TIMER_PERIOD 1*HZ
223
224 static void defense_work_handler(struct work_struct *work)
225 {
226 struct netns_ipvs *ipvs =
227 container_of(work, struct netns_ipvs, defense_work.work);
228
229 update_defense_level(ipvs);
230 if (atomic_read(&ipvs->dropentry))
231 ip_vs_random_dropentry(ipvs->net);
232 schedule_delayed_work(&ipvs->defense_work, DEFENSE_TIMER_PERIOD);
233 }
234 #endif
235
236 int
237 ip_vs_use_count_inc(void)
238 {
239 return try_module_get(THIS_MODULE);
240 }
241
242 void
243 ip_vs_use_count_dec(void)
244 {
245 module_put(THIS_MODULE);
246 }
247
248
249 /*
250 * Hash table: for virtual service lookups
251 */
252 #define IP_VS_SVC_TAB_BITS 8
253 #define IP_VS_SVC_TAB_SIZE (1 << IP_VS_SVC_TAB_BITS)
254 #define IP_VS_SVC_TAB_MASK (IP_VS_SVC_TAB_SIZE - 1)
255
256 /* the service table hashed by <protocol, addr, port> */
257 static struct hlist_head ip_vs_svc_table[IP_VS_SVC_TAB_SIZE];
258 /* the service table hashed by fwmark */
259 static struct hlist_head ip_vs_svc_fwm_table[IP_VS_SVC_TAB_SIZE];
260
261
262 /*
263 * Returns hash value for virtual service
264 */
265 static inline unsigned int
266 ip_vs_svc_hashkey(struct netns_ipvs *ipvs, int af, unsigned int proto,
267 const union nf_inet_addr *addr, __be16 port)
268 {
269 register unsigned int porth = ntohs(port);
270 __be32 addr_fold = addr->ip;
271 __u32 ahash;
272
273 #ifdef CONFIG_IP_VS_IPV6
274 if (af == AF_INET6)
275 addr_fold = addr->ip6[0]^addr->ip6[1]^
276 addr->ip6[2]^addr->ip6[3];
277 #endif
278 ahash = ntohl(addr_fold);
279 ahash ^= ((size_t) ipvs >> 8);
280
281 return (proto ^ ahash ^ (porth >> IP_VS_SVC_TAB_BITS) ^ porth) &
282 IP_VS_SVC_TAB_MASK;
283 }
284
285 /*
286 * Returns hash value of fwmark for virtual service lookup
287 */
288 static inline unsigned int ip_vs_svc_fwm_hashkey(struct netns_ipvs *ipvs, __u32 fwmark)
289 {
290 return (((size_t)ipvs>>8) ^ fwmark) & IP_VS_SVC_TAB_MASK;
291 }
292
293 /*
294 * Hashes a service in the ip_vs_svc_table by <netns,proto,addr,port>
295 * or in the ip_vs_svc_fwm_table by fwmark.
296 * Should be called with locked tables.
297 */
298 static int ip_vs_svc_hash(struct ip_vs_service *svc)
299 {
300 unsigned int hash;
301
302 if (svc->flags & IP_VS_SVC_F_HASHED) {
303 pr_err("%s(): request for already hashed, called from %pF\n",
304 __func__, __builtin_return_address(0));
305 return 0;
306 }
307
308 if (svc->fwmark == 0) {
309 /*
310 * Hash it by <netns,protocol,addr,port> in ip_vs_svc_table
311 */
312 hash = ip_vs_svc_hashkey(svc->ipvs, svc->af, svc->protocol,
313 &svc->addr, svc->port);
314 hlist_add_head_rcu(&svc->s_list, &ip_vs_svc_table[hash]);
315 } else {
316 /*
317 * Hash it by fwmark in svc_fwm_table
318 */
319 hash = ip_vs_svc_fwm_hashkey(svc->ipvs, svc->fwmark);
320 hlist_add_head_rcu(&svc->f_list, &ip_vs_svc_fwm_table[hash]);
321 }
322
323 svc->flags |= IP_VS_SVC_F_HASHED;
324 /* increase its refcnt because it is referenced by the svc table */
325 atomic_inc(&svc->refcnt);
326 return 1;
327 }
328
329
330 /*
331 * Unhashes a service from svc_table / svc_fwm_table.
332 * Should be called with locked tables.
333 */
334 static int ip_vs_svc_unhash(struct ip_vs_service *svc)
335 {
336 if (!(svc->flags & IP_VS_SVC_F_HASHED)) {
337 pr_err("%s(): request for unhash flagged, called from %pF\n",
338 __func__, __builtin_return_address(0));
339 return 0;
340 }
341
342 if (svc->fwmark == 0) {
343 /* Remove it from the svc_table table */
344 hlist_del_rcu(&svc->s_list);
345 } else {
346 /* Remove it from the svc_fwm_table table */
347 hlist_del_rcu(&svc->f_list);
348 }
349
350 svc->flags &= ~IP_VS_SVC_F_HASHED;
351 atomic_dec(&svc->refcnt);
352 return 1;
353 }
354
355
356 /*
357 * Get service by {netns, proto,addr,port} in the service table.
358 */
359 static inline struct ip_vs_service *
360 __ip_vs_service_find(struct netns_ipvs *ipvs, int af, __u16 protocol,
361 const union nf_inet_addr *vaddr, __be16 vport)
362 {
363 unsigned int hash;
364 struct ip_vs_service *svc;
365
366 /* Check for "full" addressed entries */
367 hash = ip_vs_svc_hashkey(ipvs, af, protocol, vaddr, vport);
368
369 hlist_for_each_entry_rcu(svc, &ip_vs_svc_table[hash], s_list) {
370 if ((svc->af == af)
371 && ip_vs_addr_equal(af, &svc->addr, vaddr)
372 && (svc->port == vport)
373 && (svc->protocol == protocol)
374 && (svc->ipvs == ipvs)) {
375 /* HIT */
376 return svc;
377 }
378 }
379
380 return NULL;
381 }
382
383
384 /*
385 * Get service by {fwmark} in the service table.
386 */
387 static inline struct ip_vs_service *
388 __ip_vs_svc_fwm_find(struct netns_ipvs *ipvs, int af, __u32 fwmark)
389 {
390 unsigned int hash;
391 struct ip_vs_service *svc;
392
393 /* Check for fwmark addressed entries */
394 hash = ip_vs_svc_fwm_hashkey(ipvs, fwmark);
395
396 hlist_for_each_entry_rcu(svc, &ip_vs_svc_fwm_table[hash], f_list) {
397 if (svc->fwmark == fwmark && svc->af == af
398 && (svc->ipvs == ipvs)) {
399 /* HIT */
400 return svc;
401 }
402 }
403
404 return NULL;
405 }
406
407 /* Find service, called under RCU lock */
408 struct ip_vs_service *
409 ip_vs_service_find(struct netns_ipvs *ipvs, int af, __u32 fwmark, __u16 protocol,
410 const union nf_inet_addr *vaddr, __be16 vport)
411 {
412 struct ip_vs_service *svc;
413
414 /*
415 * Check the table hashed by fwmark first
416 */
417 if (fwmark) {
418 svc = __ip_vs_svc_fwm_find(ipvs, af, fwmark);
419 if (svc)
420 goto out;
421 }
422
423 /*
424 * Check the table hashed by <protocol,addr,port>
425 * for "full" addressed entries
426 */
427 svc = __ip_vs_service_find(ipvs, af, protocol, vaddr, vport);
428
429 if (svc == NULL
430 && protocol == IPPROTO_TCP
431 && atomic_read(&ipvs->ftpsvc_counter)
432 && (vport == FTPDATA || ntohs(vport) >= PROT_SOCK)) {
433 /*
434 * Check if ftp service entry exists, the packet
435 * might belong to FTP data connections.
436 */
437 svc = __ip_vs_service_find(ipvs, af, protocol, vaddr, FTPPORT);
438 }
439
440 if (svc == NULL
441 && atomic_read(&ipvs->nullsvc_counter)) {
442 /*
443 * Check if the catch-all port (port zero) exists
444 */
445 svc = __ip_vs_service_find(ipvs, af, protocol, vaddr, 0);
446 }
447
448 out:
449 IP_VS_DBG_BUF(9, "lookup service: fwm %u %s %s:%u %s\n",
450 fwmark, ip_vs_proto_name(protocol),
451 IP_VS_DBG_ADDR(af, vaddr), ntohs(vport),
452 svc ? "hit" : "not hit");
453
454 return svc;
455 }
456
457
458 static inline void
459 __ip_vs_bind_svc(struct ip_vs_dest *dest, struct ip_vs_service *svc)
460 {
461 atomic_inc(&svc->refcnt);
462 rcu_assign_pointer(dest->svc, svc);
463 }
464
465 static void ip_vs_service_free(struct ip_vs_service *svc)
466 {
467 free_percpu(svc->stats.cpustats);
468 kfree(svc);
469 }
470
471 static void ip_vs_service_rcu_free(struct rcu_head *head)
472 {
473 struct ip_vs_service *svc;
474
475 svc = container_of(head, struct ip_vs_service, rcu_head);
476 ip_vs_service_free(svc);
477 }
478
479 static void __ip_vs_svc_put(struct ip_vs_service *svc, bool do_delay)
480 {
481 if (atomic_dec_and_test(&svc->refcnt)) {
482 IP_VS_DBG_BUF(3, "Removing service %u/%s:%u\n",
483 svc->fwmark,
484 IP_VS_DBG_ADDR(svc->af, &svc->addr),
485 ntohs(svc->port));
486 if (do_delay)
487 call_rcu(&svc->rcu_head, ip_vs_service_rcu_free);
488 else
489 ip_vs_service_free(svc);
490 }
491 }
492
493
494 /*
495 * Returns hash value for real service
496 */
497 static inline unsigned int ip_vs_rs_hashkey(int af,
498 const union nf_inet_addr *addr,
499 __be16 port)
500 {
501 register unsigned int porth = ntohs(port);
502 __be32 addr_fold = addr->ip;
503
504 #ifdef CONFIG_IP_VS_IPV6
505 if (af == AF_INET6)
506 addr_fold = addr->ip6[0]^addr->ip6[1]^
507 addr->ip6[2]^addr->ip6[3];
508 #endif
509
510 return (ntohl(addr_fold)^(porth>>IP_VS_RTAB_BITS)^porth)
511 & IP_VS_RTAB_MASK;
512 }
513
514 /* Hash ip_vs_dest in rs_table by <proto,addr,port>. */
515 static void ip_vs_rs_hash(struct netns_ipvs *ipvs, struct ip_vs_dest *dest)
516 {
517 unsigned int hash;
518
519 if (dest->in_rs_table)
520 return;
521
522 /*
523 * Hash by proto,addr,port,
524 * which are the parameters of the real service.
525 */
526 hash = ip_vs_rs_hashkey(dest->af, &dest->addr, dest->port);
527
528 hlist_add_head_rcu(&dest->d_list, &ipvs->rs_table[hash]);
529 dest->in_rs_table = 1;
530 }
531
532 /* Unhash ip_vs_dest from rs_table. */
533 static void ip_vs_rs_unhash(struct ip_vs_dest *dest)
534 {
535 /*
536 * Remove it from the rs_table table.
537 */
538 if (dest->in_rs_table) {
539 hlist_del_rcu(&dest->d_list);
540 dest->in_rs_table = 0;
541 }
542 }
543
544 /* Check if real service by <proto,addr,port> is present */
545 bool ip_vs_has_real_service(struct netns_ipvs *ipvs, int af, __u16 protocol,
546 const union nf_inet_addr *daddr, __be16 dport)
547 {
548 unsigned int hash;
549 struct ip_vs_dest *dest;
550
551 /* Check for "full" addressed entries */
552 hash = ip_vs_rs_hashkey(af, daddr, dport);
553
554 rcu_read_lock();
555 hlist_for_each_entry_rcu(dest, &ipvs->rs_table[hash], d_list) {
556 if (dest->port == dport &&
557 dest->af == af &&
558 ip_vs_addr_equal(af, &dest->addr, daddr) &&
559 (dest->protocol == protocol || dest->vfwmark)) {
560 /* HIT */
561 rcu_read_unlock();
562 return true;
563 }
564 }
565 rcu_read_unlock();
566
567 return false;
568 }
569
570 /* Lookup destination by {addr,port} in the given service
571 * Called under RCU lock.
572 */
573 static struct ip_vs_dest *
574 ip_vs_lookup_dest(struct ip_vs_service *svc, int dest_af,
575 const union nf_inet_addr *daddr, __be16 dport)
576 {
577 struct ip_vs_dest *dest;
578
579 /*
580 * Find the destination for the given service
581 */
582 list_for_each_entry_rcu(dest, &svc->destinations, n_list) {
583 if ((dest->af == dest_af) &&
584 ip_vs_addr_equal(dest_af, &dest->addr, daddr) &&
585 (dest->port == dport)) {
586 /* HIT */
587 return dest;
588 }
589 }
590
591 return NULL;
592 }
593
594 /*
595 * Find destination by {daddr,dport,vaddr,protocol}
596 * Created to be used in ip_vs_process_message() in
597 * the backup synchronization daemon. It finds the
598 * destination to be bound to the received connection
599 * on the backup.
600 * Called under RCU lock, no refcnt is returned.
601 */
602 struct ip_vs_dest *ip_vs_find_dest(struct netns_ipvs *ipvs, int svc_af, int dest_af,
603 const union nf_inet_addr *daddr,
604 __be16 dport,
605 const union nf_inet_addr *vaddr,
606 __be16 vport, __u16 protocol, __u32 fwmark,
607 __u32 flags)
608 {
609 struct ip_vs_dest *dest;
610 struct ip_vs_service *svc;
611 __be16 port = dport;
612
613 svc = ip_vs_service_find(ipvs, svc_af, fwmark, protocol, vaddr, vport);
614 if (!svc)
615 return NULL;
616 if (fwmark && (flags & IP_VS_CONN_F_FWD_MASK) != IP_VS_CONN_F_MASQ)
617 port = 0;
618 dest = ip_vs_lookup_dest(svc, dest_af, daddr, port);
619 if (!dest)
620 dest = ip_vs_lookup_dest(svc, dest_af, daddr, port ^ dport);
621 return dest;
622 }
623
624 void ip_vs_dest_dst_rcu_free(struct rcu_head *head)
625 {
626 struct ip_vs_dest_dst *dest_dst = container_of(head,
627 struct ip_vs_dest_dst,
628 rcu_head);
629
630 dst_release(dest_dst->dst_cache);
631 kfree(dest_dst);
632 }
633
634 /* Release dest_dst and dst_cache for dest in user context */
635 static void __ip_vs_dst_cache_reset(struct ip_vs_dest *dest)
636 {
637 struct ip_vs_dest_dst *old;
638
639 old = rcu_dereference_protected(dest->dest_dst, 1);
640 if (old) {
641 RCU_INIT_POINTER(dest->dest_dst, NULL);
642 call_rcu(&old->rcu_head, ip_vs_dest_dst_rcu_free);
643 }
644 }
645
646 /*
647 * Lookup dest by {svc,addr,port} in the destination trash.
648 * The destination trash is used to hold the destinations that are removed
649 * from the service table but are still referenced by some conn entries.
650 * The reason to add the destination trash is when the dest is temporary
651 * down (either by administrator or by monitor program), the dest can be
652 * picked back from the trash, the remaining connections to the dest can
653 * continue, and the counting information of the dest is also useful for
654 * scheduling.
655 */
656 static struct ip_vs_dest *
657 ip_vs_trash_get_dest(struct ip_vs_service *svc, int dest_af,
658 const union nf_inet_addr *daddr, __be16 dport)
659 {
660 struct ip_vs_dest *dest;
661 struct netns_ipvs *ipvs = svc->ipvs;
662
663 /*
664 * Find the destination in trash
665 */
666 spin_lock_bh(&ipvs->dest_trash_lock);
667 list_for_each_entry(dest, &ipvs->dest_trash, t_list) {
668 IP_VS_DBG_BUF(3, "Destination %u/%s:%u still in trash, "
669 "dest->refcnt=%d\n",
670 dest->vfwmark,
671 IP_VS_DBG_ADDR(dest->af, &dest->addr),
672 ntohs(dest->port),
673 atomic_read(&dest->refcnt));
674 if (dest->af == dest_af &&
675 ip_vs_addr_equal(dest_af, &dest->addr, daddr) &&
676 dest->port == dport &&
677 dest->vfwmark == svc->fwmark &&
678 dest->protocol == svc->protocol &&
679 (svc->fwmark ||
680 (ip_vs_addr_equal(svc->af, &dest->vaddr, &svc->addr) &&
681 dest->vport == svc->port))) {
682 /* HIT */
683 list_del(&dest->t_list);
684 ip_vs_dest_hold(dest);
685 goto out;
686 }
687 }
688
689 dest = NULL;
690
691 out:
692 spin_unlock_bh(&ipvs->dest_trash_lock);
693
694 return dest;
695 }
696
697 static void ip_vs_dest_free(struct ip_vs_dest *dest)
698 {
699 struct ip_vs_service *svc = rcu_dereference_protected(dest->svc, 1);
700
701 __ip_vs_dst_cache_reset(dest);
702 __ip_vs_svc_put(svc, false);
703 free_percpu(dest->stats.cpustats);
704 ip_vs_dest_put_and_free(dest);
705 }
706
707 /*
708 * Clean up all the destinations in the trash
709 * Called by the ip_vs_control_cleanup()
710 *
711 * When the ip_vs_control_clearup is activated by ipvs module exit,
712 * the service tables must have been flushed and all the connections
713 * are expired, and the refcnt of each destination in the trash must
714 * be 0, so we simply release them here.
715 */
716 static void ip_vs_trash_cleanup(struct netns_ipvs *ipvs)
717 {
718 struct ip_vs_dest *dest, *nxt;
719
720 del_timer_sync(&ipvs->dest_trash_timer);
721 /* No need to use dest_trash_lock */
722 list_for_each_entry_safe(dest, nxt, &ipvs->dest_trash, t_list) {
723 list_del(&dest->t_list);
724 ip_vs_dest_free(dest);
725 }
726 }
727
728 static void
729 ip_vs_copy_stats(struct ip_vs_kstats *dst, struct ip_vs_stats *src)
730 {
731 #define IP_VS_SHOW_STATS_COUNTER(c) dst->c = src->kstats.c - src->kstats0.c
732
733 spin_lock_bh(&src->lock);
734
735 IP_VS_SHOW_STATS_COUNTER(conns);
736 IP_VS_SHOW_STATS_COUNTER(inpkts);
737 IP_VS_SHOW_STATS_COUNTER(outpkts);
738 IP_VS_SHOW_STATS_COUNTER(inbytes);
739 IP_VS_SHOW_STATS_COUNTER(outbytes);
740
741 ip_vs_read_estimator(dst, src);
742
743 spin_unlock_bh(&src->lock);
744 }
745
746 static void
747 ip_vs_export_stats_user(struct ip_vs_stats_user *dst, struct ip_vs_kstats *src)
748 {
749 dst->conns = (u32)src->conns;
750 dst->inpkts = (u32)src->inpkts;
751 dst->outpkts = (u32)src->outpkts;
752 dst->inbytes = src->inbytes;
753 dst->outbytes = src->outbytes;
754 dst->cps = (u32)src->cps;
755 dst->inpps = (u32)src->inpps;
756 dst->outpps = (u32)src->outpps;
757 dst->inbps = (u32)src->inbps;
758 dst->outbps = (u32)src->outbps;
759 }
760
761 static void
762 ip_vs_zero_stats(struct ip_vs_stats *stats)
763 {
764 spin_lock_bh(&stats->lock);
765
766 /* get current counters as zero point, rates are zeroed */
767
768 #define IP_VS_ZERO_STATS_COUNTER(c) stats->kstats0.c = stats->kstats.c
769
770 IP_VS_ZERO_STATS_COUNTER(conns);
771 IP_VS_ZERO_STATS_COUNTER(inpkts);
772 IP_VS_ZERO_STATS_COUNTER(outpkts);
773 IP_VS_ZERO_STATS_COUNTER(inbytes);
774 IP_VS_ZERO_STATS_COUNTER(outbytes);
775
776 ip_vs_zero_estimator(stats);
777
778 spin_unlock_bh(&stats->lock);
779 }
780
781 /*
782 * Update a destination in the given service
783 */
784 static void
785 __ip_vs_update_dest(struct ip_vs_service *svc, struct ip_vs_dest *dest,
786 struct ip_vs_dest_user_kern *udest, int add)
787 {
788 struct netns_ipvs *ipvs = svc->ipvs;
789 struct ip_vs_service *old_svc;
790 struct ip_vs_scheduler *sched;
791 int conn_flags;
792
793 /* We cannot modify an address and change the address family */
794 BUG_ON(!add && udest->af != dest->af);
795
796 if (add && udest->af != svc->af)
797 ipvs->mixed_address_family_dests++;
798
799 /* set the weight and the flags */
800 atomic_set(&dest->weight, udest->weight);
801 conn_flags = udest->conn_flags & IP_VS_CONN_F_DEST_MASK;
802 conn_flags |= IP_VS_CONN_F_INACTIVE;
803
804 /* set the IP_VS_CONN_F_NOOUTPUT flag if not masquerading/NAT */
805 if ((conn_flags & IP_VS_CONN_F_FWD_MASK) != IP_VS_CONN_F_MASQ) {
806 conn_flags |= IP_VS_CONN_F_NOOUTPUT;
807 } else {
808 /*
809 * Put the real service in rs_table if not present.
810 * For now only for NAT!
811 */
812 ip_vs_rs_hash(ipvs, dest);
813 }
814 atomic_set(&dest->conn_flags, conn_flags);
815
816 /* bind the service */
817 old_svc = rcu_dereference_protected(dest->svc, 1);
818 if (!old_svc) {
819 __ip_vs_bind_svc(dest, svc);
820 } else {
821 if (old_svc != svc) {
822 ip_vs_zero_stats(&dest->stats);
823 __ip_vs_bind_svc(dest, svc);
824 __ip_vs_svc_put(old_svc, true);
825 }
826 }
827
828 /* set the dest status flags */
829 dest->flags |= IP_VS_DEST_F_AVAILABLE;
830
831 if (udest->u_threshold == 0 || udest->u_threshold > dest->u_threshold)
832 dest->flags &= ~IP_VS_DEST_F_OVERLOAD;
833 dest->u_threshold = udest->u_threshold;
834 dest->l_threshold = udest->l_threshold;
835
836 dest->af = udest->af;
837
838 spin_lock_bh(&dest->dst_lock);
839 __ip_vs_dst_cache_reset(dest);
840 spin_unlock_bh(&dest->dst_lock);
841
842 if (add) {
843 ip_vs_start_estimator(svc->ipvs->net, &dest->stats);
844 list_add_rcu(&dest->n_list, &svc->destinations);
845 svc->num_dests++;
846 sched = rcu_dereference_protected(svc->scheduler, 1);
847 if (sched && sched->add_dest)
848 sched->add_dest(svc, dest);
849 } else {
850 sched = rcu_dereference_protected(svc->scheduler, 1);
851 if (sched && sched->upd_dest)
852 sched->upd_dest(svc, dest);
853 }
854 }
855
856
857 /*
858 * Create a destination for the given service
859 */
860 static int
861 ip_vs_new_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest,
862 struct ip_vs_dest **dest_p)
863 {
864 struct ip_vs_dest *dest;
865 unsigned int atype, i;
866
867 EnterFunction(2);
868
869 #ifdef CONFIG_IP_VS_IPV6
870 if (udest->af == AF_INET6) {
871 atype = ipv6_addr_type(&udest->addr.in6);
872 if ((!(atype & IPV6_ADDR_UNICAST) ||
873 atype & IPV6_ADDR_LINKLOCAL) &&
874 !__ip_vs_addr_is_local_v6(svc->ipvs->net, &udest->addr.in6))
875 return -EINVAL;
876 } else
877 #endif
878 {
879 atype = inet_addr_type(svc->ipvs->net, udest->addr.ip);
880 if (atype != RTN_LOCAL && atype != RTN_UNICAST)
881 return -EINVAL;
882 }
883
884 dest = kzalloc(sizeof(struct ip_vs_dest), GFP_KERNEL);
885 if (dest == NULL)
886 return -ENOMEM;
887
888 dest->stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
889 if (!dest->stats.cpustats)
890 goto err_alloc;
891
892 for_each_possible_cpu(i) {
893 struct ip_vs_cpu_stats *ip_vs_dest_stats;
894 ip_vs_dest_stats = per_cpu_ptr(dest->stats.cpustats, i);
895 u64_stats_init(&ip_vs_dest_stats->syncp);
896 }
897
898 dest->af = udest->af;
899 dest->protocol = svc->protocol;
900 dest->vaddr = svc->addr;
901 dest->vport = svc->port;
902 dest->vfwmark = svc->fwmark;
903 ip_vs_addr_copy(udest->af, &dest->addr, &udest->addr);
904 dest->port = udest->port;
905
906 atomic_set(&dest->activeconns, 0);
907 atomic_set(&dest->inactconns, 0);
908 atomic_set(&dest->persistconns, 0);
909 atomic_set(&dest->refcnt, 1);
910
911 INIT_HLIST_NODE(&dest->d_list);
912 spin_lock_init(&dest->dst_lock);
913 spin_lock_init(&dest->stats.lock);
914 __ip_vs_update_dest(svc, dest, udest, 1);
915
916 *dest_p = dest;
917
918 LeaveFunction(2);
919 return 0;
920
921 err_alloc:
922 kfree(dest);
923 return -ENOMEM;
924 }
925
926
927 /*
928 * Add a destination into an existing service
929 */
930 static int
931 ip_vs_add_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
932 {
933 struct ip_vs_dest *dest;
934 union nf_inet_addr daddr;
935 __be16 dport = udest->port;
936 int ret;
937
938 EnterFunction(2);
939
940 if (udest->weight < 0) {
941 pr_err("%s(): server weight less than zero\n", __func__);
942 return -ERANGE;
943 }
944
945 if (udest->l_threshold > udest->u_threshold) {
946 pr_err("%s(): lower threshold is higher than upper threshold\n",
947 __func__);
948 return -ERANGE;
949 }
950
951 ip_vs_addr_copy(udest->af, &daddr, &udest->addr);
952
953 /* We use function that requires RCU lock */
954 rcu_read_lock();
955 dest = ip_vs_lookup_dest(svc, udest->af, &daddr, dport);
956 rcu_read_unlock();
957
958 if (dest != NULL) {
959 IP_VS_DBG(1, "%s(): dest already exists\n", __func__);
960 return -EEXIST;
961 }
962
963 /*
964 * Check if the dest already exists in the trash and
965 * is from the same service
966 */
967 dest = ip_vs_trash_get_dest(svc, udest->af, &daddr, dport);
968
969 if (dest != NULL) {
970 IP_VS_DBG_BUF(3, "Get destination %s:%u from trash, "
971 "dest->refcnt=%d, service %u/%s:%u\n",
972 IP_VS_DBG_ADDR(udest->af, &daddr), ntohs(dport),
973 atomic_read(&dest->refcnt),
974 dest->vfwmark,
975 IP_VS_DBG_ADDR(svc->af, &dest->vaddr),
976 ntohs(dest->vport));
977
978 __ip_vs_update_dest(svc, dest, udest, 1);
979 ret = 0;
980 } else {
981 /*
982 * Allocate and initialize the dest structure
983 */
984 ret = ip_vs_new_dest(svc, udest, &dest);
985 }
986 LeaveFunction(2);
987
988 return ret;
989 }
990
991
992 /*
993 * Edit a destination in the given service
994 */
995 static int
996 ip_vs_edit_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
997 {
998 struct ip_vs_dest *dest;
999 union nf_inet_addr daddr;
1000 __be16 dport = udest->port;
1001
1002 EnterFunction(2);
1003
1004 if (udest->weight < 0) {
1005 pr_err("%s(): server weight less than zero\n", __func__);
1006 return -ERANGE;
1007 }
1008
1009 if (udest->l_threshold > udest->u_threshold) {
1010 pr_err("%s(): lower threshold is higher than upper threshold\n",
1011 __func__);
1012 return -ERANGE;
1013 }
1014
1015 ip_vs_addr_copy(udest->af, &daddr, &udest->addr);
1016
1017 /* We use function that requires RCU lock */
1018 rcu_read_lock();
1019 dest = ip_vs_lookup_dest(svc, udest->af, &daddr, dport);
1020 rcu_read_unlock();
1021
1022 if (dest == NULL) {
1023 IP_VS_DBG(1, "%s(): dest doesn't exist\n", __func__);
1024 return -ENOENT;
1025 }
1026
1027 __ip_vs_update_dest(svc, dest, udest, 0);
1028 LeaveFunction(2);
1029
1030 return 0;
1031 }
1032
1033 /*
1034 * Delete a destination (must be already unlinked from the service)
1035 */
1036 static void __ip_vs_del_dest(struct netns_ipvs *ipvs, struct ip_vs_dest *dest,
1037 bool cleanup)
1038 {
1039 ip_vs_stop_estimator(ipvs->net, &dest->stats);
1040
1041 /*
1042 * Remove it from the d-linked list with the real services.
1043 */
1044 ip_vs_rs_unhash(dest);
1045
1046 spin_lock_bh(&ipvs->dest_trash_lock);
1047 IP_VS_DBG_BUF(3, "Moving dest %s:%u into trash, dest->refcnt=%d\n",
1048 IP_VS_DBG_ADDR(dest->af, &dest->addr), ntohs(dest->port),
1049 atomic_read(&dest->refcnt));
1050 if (list_empty(&ipvs->dest_trash) && !cleanup)
1051 mod_timer(&ipvs->dest_trash_timer,
1052 jiffies + (IP_VS_DEST_TRASH_PERIOD >> 1));
1053 /* dest lives in trash without reference */
1054 list_add(&dest->t_list, &ipvs->dest_trash);
1055 dest->idle_start = 0;
1056 spin_unlock_bh(&ipvs->dest_trash_lock);
1057 ip_vs_dest_put(dest);
1058 }
1059
1060
1061 /*
1062 * Unlink a destination from the given service
1063 */
1064 static void __ip_vs_unlink_dest(struct ip_vs_service *svc,
1065 struct ip_vs_dest *dest,
1066 int svcupd)
1067 {
1068 dest->flags &= ~IP_VS_DEST_F_AVAILABLE;
1069
1070 /*
1071 * Remove it from the d-linked destination list.
1072 */
1073 list_del_rcu(&dest->n_list);
1074 svc->num_dests--;
1075
1076 if (dest->af != svc->af)
1077 svc->ipvs->mixed_address_family_dests--;
1078
1079 if (svcupd) {
1080 struct ip_vs_scheduler *sched;
1081
1082 sched = rcu_dereference_protected(svc->scheduler, 1);
1083 if (sched && sched->del_dest)
1084 sched->del_dest(svc, dest);
1085 }
1086 }
1087
1088
1089 /*
1090 * Delete a destination server in the given service
1091 */
1092 static int
1093 ip_vs_del_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
1094 {
1095 struct ip_vs_dest *dest;
1096 __be16 dport = udest->port;
1097
1098 EnterFunction(2);
1099
1100 /* We use function that requires RCU lock */
1101 rcu_read_lock();
1102 dest = ip_vs_lookup_dest(svc, udest->af, &udest->addr, dport);
1103 rcu_read_unlock();
1104
1105 if (dest == NULL) {
1106 IP_VS_DBG(1, "%s(): destination not found!\n", __func__);
1107 return -ENOENT;
1108 }
1109
1110 /*
1111 * Unlink dest from the service
1112 */
1113 __ip_vs_unlink_dest(svc, dest, 1);
1114
1115 /*
1116 * Delete the destination
1117 */
1118 __ip_vs_del_dest(svc->ipvs, dest, false);
1119
1120 LeaveFunction(2);
1121
1122 return 0;
1123 }
1124
1125 static void ip_vs_dest_trash_expire(unsigned long data)
1126 {
1127 struct netns_ipvs *ipvs = (struct netns_ipvs *)data;
1128 struct ip_vs_dest *dest, *next;
1129 unsigned long now = jiffies;
1130
1131 spin_lock(&ipvs->dest_trash_lock);
1132 list_for_each_entry_safe(dest, next, &ipvs->dest_trash, t_list) {
1133 if (atomic_read(&dest->refcnt) > 0)
1134 continue;
1135 if (dest->idle_start) {
1136 if (time_before(now, dest->idle_start +
1137 IP_VS_DEST_TRASH_PERIOD))
1138 continue;
1139 } else {
1140 dest->idle_start = max(1UL, now);
1141 continue;
1142 }
1143 IP_VS_DBG_BUF(3, "Removing destination %u/%s:%u from trash\n",
1144 dest->vfwmark,
1145 IP_VS_DBG_ADDR(dest->af, &dest->addr),
1146 ntohs(dest->port));
1147 list_del(&dest->t_list);
1148 ip_vs_dest_free(dest);
1149 }
1150 if (!list_empty(&ipvs->dest_trash))
1151 mod_timer(&ipvs->dest_trash_timer,
1152 jiffies + (IP_VS_DEST_TRASH_PERIOD >> 1));
1153 spin_unlock(&ipvs->dest_trash_lock);
1154 }
1155
1156 /*
1157 * Add a service into the service hash table
1158 */
1159 static int
1160 ip_vs_add_service(struct netns_ipvs *ipvs, struct ip_vs_service_user_kern *u,
1161 struct ip_vs_service **svc_p)
1162 {
1163 int ret = 0, i;
1164 struct ip_vs_scheduler *sched = NULL;
1165 struct ip_vs_pe *pe = NULL;
1166 struct ip_vs_service *svc = NULL;
1167
1168 /* increase the module use count */
1169 ip_vs_use_count_inc();
1170
1171 /* Lookup the scheduler by 'u->sched_name' */
1172 if (strcmp(u->sched_name, "none")) {
1173 sched = ip_vs_scheduler_get(u->sched_name);
1174 if (!sched) {
1175 pr_info("Scheduler module ip_vs_%s not found\n",
1176 u->sched_name);
1177 ret = -ENOENT;
1178 goto out_err;
1179 }
1180 }
1181
1182 if (u->pe_name && *u->pe_name) {
1183 pe = ip_vs_pe_getbyname(u->pe_name);
1184 if (pe == NULL) {
1185 pr_info("persistence engine module ip_vs_pe_%s "
1186 "not found\n", u->pe_name);
1187 ret = -ENOENT;
1188 goto out_err;
1189 }
1190 }
1191
1192 #ifdef CONFIG_IP_VS_IPV6
1193 if (u->af == AF_INET6) {
1194 __u32 plen = (__force __u32) u->netmask;
1195
1196 if (plen < 1 || plen > 128) {
1197 ret = -EINVAL;
1198 goto out_err;
1199 }
1200 }
1201 #endif
1202
1203 svc = kzalloc(sizeof(struct ip_vs_service), GFP_KERNEL);
1204 if (svc == NULL) {
1205 IP_VS_DBG(1, "%s(): no memory\n", __func__);
1206 ret = -ENOMEM;
1207 goto out_err;
1208 }
1209 svc->stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
1210 if (!svc->stats.cpustats) {
1211 ret = -ENOMEM;
1212 goto out_err;
1213 }
1214
1215 for_each_possible_cpu(i) {
1216 struct ip_vs_cpu_stats *ip_vs_stats;
1217 ip_vs_stats = per_cpu_ptr(svc->stats.cpustats, i);
1218 u64_stats_init(&ip_vs_stats->syncp);
1219 }
1220
1221
1222 /* I'm the first user of the service */
1223 atomic_set(&svc->refcnt, 0);
1224
1225 svc->af = u->af;
1226 svc->protocol = u->protocol;
1227 ip_vs_addr_copy(svc->af, &svc->addr, &u->addr);
1228 svc->port = u->port;
1229 svc->fwmark = u->fwmark;
1230 svc->flags = u->flags;
1231 svc->timeout = u->timeout * HZ;
1232 svc->netmask = u->netmask;
1233 svc->ipvs = ipvs;
1234
1235 INIT_LIST_HEAD(&svc->destinations);
1236 spin_lock_init(&svc->sched_lock);
1237 spin_lock_init(&svc->stats.lock);
1238
1239 /* Bind the scheduler */
1240 if (sched) {
1241 ret = ip_vs_bind_scheduler(svc, sched);
1242 if (ret)
1243 goto out_err;
1244 sched = NULL;
1245 }
1246
1247 /* Bind the ct retriever */
1248 RCU_INIT_POINTER(svc->pe, pe);
1249 pe = NULL;
1250
1251 /* Update the virtual service counters */
1252 if (svc->port == FTPPORT)
1253 atomic_inc(&ipvs->ftpsvc_counter);
1254 else if (svc->port == 0)
1255 atomic_inc(&ipvs->nullsvc_counter);
1256
1257 ip_vs_start_estimator(ipvs->net, &svc->stats);
1258
1259 /* Count only IPv4 services for old get/setsockopt interface */
1260 if (svc->af == AF_INET)
1261 ipvs->num_services++;
1262
1263 /* Hash the service into the service table */
1264 ip_vs_svc_hash(svc);
1265
1266 *svc_p = svc;
1267 /* Now there is a service - full throttle */
1268 ipvs->enable = 1;
1269 return 0;
1270
1271
1272 out_err:
1273 if (svc != NULL) {
1274 ip_vs_unbind_scheduler(svc, sched);
1275 ip_vs_service_free(svc);
1276 }
1277 ip_vs_scheduler_put(sched);
1278 ip_vs_pe_put(pe);
1279
1280 /* decrease the module use count */
1281 ip_vs_use_count_dec();
1282
1283 return ret;
1284 }
1285
1286
1287 /*
1288 * Edit a service and bind it with a new scheduler
1289 */
1290 static int
1291 ip_vs_edit_service(struct ip_vs_service *svc, struct ip_vs_service_user_kern *u)
1292 {
1293 struct ip_vs_scheduler *sched = NULL, *old_sched;
1294 struct ip_vs_pe *pe = NULL, *old_pe = NULL;
1295 int ret = 0;
1296
1297 /*
1298 * Lookup the scheduler, by 'u->sched_name'
1299 */
1300 if (strcmp(u->sched_name, "none")) {
1301 sched = ip_vs_scheduler_get(u->sched_name);
1302 if (!sched) {
1303 pr_info("Scheduler module ip_vs_%s not found\n",
1304 u->sched_name);
1305 return -ENOENT;
1306 }
1307 }
1308 old_sched = sched;
1309
1310 if (u->pe_name && *u->pe_name) {
1311 pe = ip_vs_pe_getbyname(u->pe_name);
1312 if (pe == NULL) {
1313 pr_info("persistence engine module ip_vs_pe_%s "
1314 "not found\n", u->pe_name);
1315 ret = -ENOENT;
1316 goto out;
1317 }
1318 old_pe = pe;
1319 }
1320
1321 #ifdef CONFIG_IP_VS_IPV6
1322 if (u->af == AF_INET6) {
1323 __u32 plen = (__force __u32) u->netmask;
1324
1325 if (plen < 1 || plen > 128) {
1326 ret = -EINVAL;
1327 goto out;
1328 }
1329 }
1330 #endif
1331
1332 old_sched = rcu_dereference_protected(svc->scheduler, 1);
1333 if (sched != old_sched) {
1334 if (old_sched) {
1335 ip_vs_unbind_scheduler(svc, old_sched);
1336 RCU_INIT_POINTER(svc->scheduler, NULL);
1337 /* Wait all svc->sched_data users */
1338 synchronize_rcu();
1339 }
1340 /* Bind the new scheduler */
1341 if (sched) {
1342 ret = ip_vs_bind_scheduler(svc, sched);
1343 if (ret) {
1344 ip_vs_scheduler_put(sched);
1345 goto out;
1346 }
1347 }
1348 }
1349
1350 /*
1351 * Set the flags and timeout value
1352 */
1353 svc->flags = u->flags | IP_VS_SVC_F_HASHED;
1354 svc->timeout = u->timeout * HZ;
1355 svc->netmask = u->netmask;
1356
1357 old_pe = rcu_dereference_protected(svc->pe, 1);
1358 if (pe != old_pe)
1359 rcu_assign_pointer(svc->pe, pe);
1360
1361 out:
1362 ip_vs_scheduler_put(old_sched);
1363 ip_vs_pe_put(old_pe);
1364 return ret;
1365 }
1366
1367 /*
1368 * Delete a service from the service list
1369 * - The service must be unlinked, unlocked and not referenced!
1370 * - We are called under _bh lock
1371 */
1372 static void __ip_vs_del_service(struct ip_vs_service *svc, bool cleanup)
1373 {
1374 struct ip_vs_dest *dest, *nxt;
1375 struct ip_vs_scheduler *old_sched;
1376 struct ip_vs_pe *old_pe;
1377 struct netns_ipvs *ipvs = svc->ipvs;
1378
1379 pr_info("%s: enter\n", __func__);
1380
1381 /* Count only IPv4 services for old get/setsockopt interface */
1382 if (svc->af == AF_INET)
1383 ipvs->num_services--;
1384
1385 ip_vs_stop_estimator(svc->ipvs->net, &svc->stats);
1386
1387 /* Unbind scheduler */
1388 old_sched = rcu_dereference_protected(svc->scheduler, 1);
1389 ip_vs_unbind_scheduler(svc, old_sched);
1390 ip_vs_scheduler_put(old_sched);
1391
1392 /* Unbind persistence engine, keep svc->pe */
1393 old_pe = rcu_dereference_protected(svc->pe, 1);
1394 ip_vs_pe_put(old_pe);
1395
1396 /*
1397 * Unlink the whole destination list
1398 */
1399 list_for_each_entry_safe(dest, nxt, &svc->destinations, n_list) {
1400 __ip_vs_unlink_dest(svc, dest, 0);
1401 __ip_vs_del_dest(svc->ipvs, dest, cleanup);
1402 }
1403
1404 /*
1405 * Update the virtual service counters
1406 */
1407 if (svc->port == FTPPORT)
1408 atomic_dec(&ipvs->ftpsvc_counter);
1409 else if (svc->port == 0)
1410 atomic_dec(&ipvs->nullsvc_counter);
1411
1412 /*
1413 * Free the service if nobody refers to it
1414 */
1415 __ip_vs_svc_put(svc, true);
1416
1417 /* decrease the module use count */
1418 ip_vs_use_count_dec();
1419 }
1420
1421 /*
1422 * Unlink a service from list and try to delete it if its refcnt reached 0
1423 */
1424 static void ip_vs_unlink_service(struct ip_vs_service *svc, bool cleanup)
1425 {
1426 /* Hold svc to avoid double release from dest_trash */
1427 atomic_inc(&svc->refcnt);
1428 /*
1429 * Unhash it from the service table
1430 */
1431 ip_vs_svc_unhash(svc);
1432
1433 __ip_vs_del_service(svc, cleanup);
1434 }
1435
1436 /*
1437 * Delete a service from the service list
1438 */
1439 static int ip_vs_del_service(struct ip_vs_service *svc)
1440 {
1441 if (svc == NULL)
1442 return -EEXIST;
1443 ip_vs_unlink_service(svc, false);
1444
1445 return 0;
1446 }
1447
1448
1449 /*
1450 * Flush all the virtual services
1451 */
1452 static int ip_vs_flush(struct netns_ipvs *ipvs, bool cleanup)
1453 {
1454 int idx;
1455 struct ip_vs_service *svc;
1456 struct hlist_node *n;
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 hlist_for_each_entry_safe(svc, n, &ip_vs_svc_table[idx],
1463 s_list) {
1464 if (svc->ipvs == ipvs)
1465 ip_vs_unlink_service(svc, cleanup);
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 hlist_for_each_entry_safe(svc, n, &ip_vs_svc_fwm_table[idx],
1474 f_list) {
1475 if (svc->ipvs == ipvs)
1476 ip_vs_unlink_service(svc, cleanup);
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 netns_ipvs *ipvs)
1488 {
1489 EnterFunction(2);
1490 /* Check for "full" addressed entries */
1491 mutex_lock(&__ip_vs_mutex);
1492 ip_vs_flush(ipvs, true);
1493 mutex_unlock(&__ip_vs_mutex);
1494 LeaveFunction(2);
1495 }
1496
1497 /* Put all references for device (dst_cache) */
1498 static inline void
1499 ip_vs_forget_dev(struct ip_vs_dest *dest, struct net_device *dev)
1500 {
1501 struct ip_vs_dest_dst *dest_dst;
1502
1503 spin_lock_bh(&dest->dst_lock);
1504 dest_dst = rcu_dereference_protected(dest->dest_dst, 1);
1505 if (dest_dst && dest_dst->dst_cache->dev == dev) {
1506 IP_VS_DBG_BUF(3, "Reset dev:%s dest %s:%u ,dest->refcnt=%d\n",
1507 dev->name,
1508 IP_VS_DBG_ADDR(dest->af, &dest->addr),
1509 ntohs(dest->port),
1510 atomic_read(&dest->refcnt));
1511 __ip_vs_dst_cache_reset(dest);
1512 }
1513 spin_unlock_bh(&dest->dst_lock);
1514
1515 }
1516 /* Netdev event receiver
1517 * Currently only NETDEV_DOWN is handled to release refs to cached dsts
1518 */
1519 static int ip_vs_dst_event(struct notifier_block *this, unsigned long event,
1520 void *ptr)
1521 {
1522 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1523 struct net *net = dev_net(dev);
1524 struct netns_ipvs *ipvs = net_ipvs(net);
1525 struct ip_vs_service *svc;
1526 struct ip_vs_dest *dest;
1527 unsigned int idx;
1528
1529 if (event != NETDEV_DOWN || !ipvs)
1530 return NOTIFY_DONE;
1531 IP_VS_DBG(3, "%s() dev=%s\n", __func__, dev->name);
1532 EnterFunction(2);
1533 mutex_lock(&__ip_vs_mutex);
1534 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1535 hlist_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
1536 if (svc->ipvs == ipvs) {
1537 list_for_each_entry(dest, &svc->destinations,
1538 n_list) {
1539 ip_vs_forget_dev(dest, dev);
1540 }
1541 }
1542 }
1543
1544 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
1545 if (svc->ipvs == ipvs) {
1546 list_for_each_entry(dest, &svc->destinations,
1547 n_list) {
1548 ip_vs_forget_dev(dest, dev);
1549 }
1550 }
1551
1552 }
1553 }
1554
1555 spin_lock_bh(&ipvs->dest_trash_lock);
1556 list_for_each_entry(dest, &ipvs->dest_trash, t_list) {
1557 ip_vs_forget_dev(dest, dev);
1558 }
1559 spin_unlock_bh(&ipvs->dest_trash_lock);
1560 mutex_unlock(&__ip_vs_mutex);
1561 LeaveFunction(2);
1562 return NOTIFY_DONE;
1563 }
1564
1565 /*
1566 * Zero counters in a service or all services
1567 */
1568 static int ip_vs_zero_service(struct ip_vs_service *svc)
1569 {
1570 struct ip_vs_dest *dest;
1571
1572 list_for_each_entry(dest, &svc->destinations, n_list) {
1573 ip_vs_zero_stats(&dest->stats);
1574 }
1575 ip_vs_zero_stats(&svc->stats);
1576 return 0;
1577 }
1578
1579 static int ip_vs_zero_all(struct netns_ipvs *ipvs)
1580 {
1581 int idx;
1582 struct ip_vs_service *svc;
1583
1584 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1585 hlist_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
1586 if (svc->ipvs == ipvs)
1587 ip_vs_zero_service(svc);
1588 }
1589 }
1590
1591 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1592 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
1593 if (svc->ipvs == ipvs)
1594 ip_vs_zero_service(svc);
1595 }
1596 }
1597
1598 ip_vs_zero_stats(&ipvs->tot_stats);
1599 return 0;
1600 }
1601
1602 #ifdef CONFIG_SYSCTL
1603
1604 static int zero;
1605 static int three = 3;
1606
1607 static int
1608 proc_do_defense_mode(struct ctl_table *table, int write,
1609 void __user *buffer, size_t *lenp, loff_t *ppos)
1610 {
1611 struct netns_ipvs *ipvs = table->extra2;
1612 int *valp = table->data;
1613 int val = *valp;
1614 int rc;
1615
1616 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1617 if (write && (*valp != val)) {
1618 if ((*valp < 0) || (*valp > 3)) {
1619 /* Restore the correct value */
1620 *valp = val;
1621 } else {
1622 update_defense_level(ipvs);
1623 }
1624 }
1625 return rc;
1626 }
1627
1628 static int
1629 proc_do_sync_threshold(struct ctl_table *table, int write,
1630 void __user *buffer, size_t *lenp, loff_t *ppos)
1631 {
1632 int *valp = table->data;
1633 int val[2];
1634 int rc;
1635
1636 /* backup the value first */
1637 memcpy(val, valp, sizeof(val));
1638
1639 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1640 if (write && (valp[0] < 0 || valp[1] < 0 ||
1641 (valp[0] >= valp[1] && valp[1]))) {
1642 /* Restore the correct value */
1643 memcpy(valp, val, sizeof(val));
1644 }
1645 return rc;
1646 }
1647
1648 static int
1649 proc_do_sync_mode(struct ctl_table *table, int write,
1650 void __user *buffer, size_t *lenp, loff_t *ppos)
1651 {
1652 int *valp = table->data;
1653 int val = *valp;
1654 int rc;
1655
1656 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1657 if (write && (*valp != val)) {
1658 if ((*valp < 0) || (*valp > 1)) {
1659 /* Restore the correct value */
1660 *valp = val;
1661 }
1662 }
1663 return rc;
1664 }
1665
1666 static int
1667 proc_do_sync_ports(struct ctl_table *table, int write,
1668 void __user *buffer, size_t *lenp, loff_t *ppos)
1669 {
1670 int *valp = table->data;
1671 int val = *valp;
1672 int rc;
1673
1674 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1675 if (write && (*valp != val)) {
1676 if (*valp < 1 || !is_power_of_2(*valp)) {
1677 /* Restore the correct value */
1678 *valp = val;
1679 }
1680 }
1681 return rc;
1682 }
1683
1684 /*
1685 * IPVS sysctl table (under the /proc/sys/net/ipv4/vs/)
1686 * Do not change order or insert new entries without
1687 * align with netns init in ip_vs_control_net_init()
1688 */
1689
1690 static struct ctl_table vs_vars[] = {
1691 {
1692 .procname = "amemthresh",
1693 .maxlen = sizeof(int),
1694 .mode = 0644,
1695 .proc_handler = proc_dointvec,
1696 },
1697 {
1698 .procname = "am_droprate",
1699 .maxlen = sizeof(int),
1700 .mode = 0644,
1701 .proc_handler = proc_dointvec,
1702 },
1703 {
1704 .procname = "drop_entry",
1705 .maxlen = sizeof(int),
1706 .mode = 0644,
1707 .proc_handler = proc_do_defense_mode,
1708 },
1709 {
1710 .procname = "drop_packet",
1711 .maxlen = sizeof(int),
1712 .mode = 0644,
1713 .proc_handler = proc_do_defense_mode,
1714 },
1715 #ifdef CONFIG_IP_VS_NFCT
1716 {
1717 .procname = "conntrack",
1718 .maxlen = sizeof(int),
1719 .mode = 0644,
1720 .proc_handler = &proc_dointvec,
1721 },
1722 #endif
1723 {
1724 .procname = "secure_tcp",
1725 .maxlen = sizeof(int),
1726 .mode = 0644,
1727 .proc_handler = proc_do_defense_mode,
1728 },
1729 {
1730 .procname = "snat_reroute",
1731 .maxlen = sizeof(int),
1732 .mode = 0644,
1733 .proc_handler = &proc_dointvec,
1734 },
1735 {
1736 .procname = "sync_version",
1737 .maxlen = sizeof(int),
1738 .mode = 0644,
1739 .proc_handler = &proc_do_sync_mode,
1740 },
1741 {
1742 .procname = "sync_ports",
1743 .maxlen = sizeof(int),
1744 .mode = 0644,
1745 .proc_handler = &proc_do_sync_ports,
1746 },
1747 {
1748 .procname = "sync_persist_mode",
1749 .maxlen = sizeof(int),
1750 .mode = 0644,
1751 .proc_handler = proc_dointvec,
1752 },
1753 {
1754 .procname = "sync_qlen_max",
1755 .maxlen = sizeof(unsigned long),
1756 .mode = 0644,
1757 .proc_handler = proc_doulongvec_minmax,
1758 },
1759 {
1760 .procname = "sync_sock_size",
1761 .maxlen = sizeof(int),
1762 .mode = 0644,
1763 .proc_handler = proc_dointvec,
1764 },
1765 {
1766 .procname = "cache_bypass",
1767 .maxlen = sizeof(int),
1768 .mode = 0644,
1769 .proc_handler = proc_dointvec,
1770 },
1771 {
1772 .procname = "expire_nodest_conn",
1773 .maxlen = sizeof(int),
1774 .mode = 0644,
1775 .proc_handler = proc_dointvec,
1776 },
1777 {
1778 .procname = "sloppy_tcp",
1779 .maxlen = sizeof(int),
1780 .mode = 0644,
1781 .proc_handler = proc_dointvec,
1782 },
1783 {
1784 .procname = "sloppy_sctp",
1785 .maxlen = sizeof(int),
1786 .mode = 0644,
1787 .proc_handler = proc_dointvec,
1788 },
1789 {
1790 .procname = "expire_quiescent_template",
1791 .maxlen = sizeof(int),
1792 .mode = 0644,
1793 .proc_handler = proc_dointvec,
1794 },
1795 {
1796 .procname = "sync_threshold",
1797 .maxlen =
1798 sizeof(((struct netns_ipvs *)0)->sysctl_sync_threshold),
1799 .mode = 0644,
1800 .proc_handler = proc_do_sync_threshold,
1801 },
1802 {
1803 .procname = "sync_refresh_period",
1804 .maxlen = sizeof(int),
1805 .mode = 0644,
1806 .proc_handler = proc_dointvec_jiffies,
1807 },
1808 {
1809 .procname = "sync_retries",
1810 .maxlen = sizeof(int),
1811 .mode = 0644,
1812 .proc_handler = proc_dointvec_minmax,
1813 .extra1 = &zero,
1814 .extra2 = &three,
1815 },
1816 {
1817 .procname = "nat_icmp_send",
1818 .maxlen = sizeof(int),
1819 .mode = 0644,
1820 .proc_handler = proc_dointvec,
1821 },
1822 {
1823 .procname = "pmtu_disc",
1824 .maxlen = sizeof(int),
1825 .mode = 0644,
1826 .proc_handler = proc_dointvec,
1827 },
1828 {
1829 .procname = "backup_only",
1830 .maxlen = sizeof(int),
1831 .mode = 0644,
1832 .proc_handler = proc_dointvec,
1833 },
1834 {
1835 .procname = "conn_reuse_mode",
1836 .maxlen = sizeof(int),
1837 .mode = 0644,
1838 .proc_handler = proc_dointvec,
1839 },
1840 {
1841 .procname = "schedule_icmp",
1842 .maxlen = sizeof(int),
1843 .mode = 0644,
1844 .proc_handler = proc_dointvec,
1845 },
1846 {
1847 .procname = "ignore_tunneled",
1848 .maxlen = sizeof(int),
1849 .mode = 0644,
1850 .proc_handler = proc_dointvec,
1851 },
1852 #ifdef CONFIG_IP_VS_DEBUG
1853 {
1854 .procname = "debug_level",
1855 .data = &sysctl_ip_vs_debug_level,
1856 .maxlen = sizeof(int),
1857 .mode = 0644,
1858 .proc_handler = proc_dointvec,
1859 },
1860 #endif
1861 { }
1862 };
1863
1864 #endif
1865
1866 #ifdef CONFIG_PROC_FS
1867
1868 struct ip_vs_iter {
1869 struct seq_net_private p; /* Do not move this, netns depends upon it*/
1870 struct hlist_head *table;
1871 int bucket;
1872 };
1873
1874 /*
1875 * Write the contents of the VS rule table to a PROCfs file.
1876 * (It is kept just for backward compatibility)
1877 */
1878 static inline const char *ip_vs_fwd_name(unsigned int flags)
1879 {
1880 switch (flags & IP_VS_CONN_F_FWD_MASK) {
1881 case IP_VS_CONN_F_LOCALNODE:
1882 return "Local";
1883 case IP_VS_CONN_F_TUNNEL:
1884 return "Tunnel";
1885 case IP_VS_CONN_F_DROUTE:
1886 return "Route";
1887 default:
1888 return "Masq";
1889 }
1890 }
1891
1892
1893 /* Get the Nth entry in the two lists */
1894 static struct ip_vs_service *ip_vs_info_array(struct seq_file *seq, loff_t pos)
1895 {
1896 struct net *net = seq_file_net(seq);
1897 struct netns_ipvs *ipvs = net_ipvs(net);
1898 struct ip_vs_iter *iter = seq->private;
1899 int idx;
1900 struct ip_vs_service *svc;
1901
1902 /* look in hash by protocol */
1903 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1904 hlist_for_each_entry_rcu(svc, &ip_vs_svc_table[idx], s_list) {
1905 if ((svc->ipvs == ipvs) && pos-- == 0) {
1906 iter->table = ip_vs_svc_table;
1907 iter->bucket = idx;
1908 return svc;
1909 }
1910 }
1911 }
1912
1913 /* keep looking in fwmark */
1914 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1915 hlist_for_each_entry_rcu(svc, &ip_vs_svc_fwm_table[idx],
1916 f_list) {
1917 if ((svc->ipvs == ipvs) && pos-- == 0) {
1918 iter->table = ip_vs_svc_fwm_table;
1919 iter->bucket = idx;
1920 return svc;
1921 }
1922 }
1923 }
1924
1925 return NULL;
1926 }
1927
1928 static void *ip_vs_info_seq_start(struct seq_file *seq, loff_t *pos)
1929 __acquires(RCU)
1930 {
1931 rcu_read_lock();
1932 return *pos ? ip_vs_info_array(seq, *pos - 1) : SEQ_START_TOKEN;
1933 }
1934
1935
1936 static void *ip_vs_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1937 {
1938 struct hlist_node *e;
1939 struct ip_vs_iter *iter;
1940 struct ip_vs_service *svc;
1941
1942 ++*pos;
1943 if (v == SEQ_START_TOKEN)
1944 return ip_vs_info_array(seq,0);
1945
1946 svc = v;
1947 iter = seq->private;
1948
1949 if (iter->table == ip_vs_svc_table) {
1950 /* next service in table hashed by protocol */
1951 e = rcu_dereference(hlist_next_rcu(&svc->s_list));
1952 if (e)
1953 return hlist_entry(e, struct ip_vs_service, s_list);
1954
1955 while (++iter->bucket < IP_VS_SVC_TAB_SIZE) {
1956 hlist_for_each_entry_rcu(svc,
1957 &ip_vs_svc_table[iter->bucket],
1958 s_list) {
1959 return svc;
1960 }
1961 }
1962
1963 iter->table = ip_vs_svc_fwm_table;
1964 iter->bucket = -1;
1965 goto scan_fwmark;
1966 }
1967
1968 /* next service in hashed by fwmark */
1969 e = rcu_dereference(hlist_next_rcu(&svc->f_list));
1970 if (e)
1971 return hlist_entry(e, struct ip_vs_service, f_list);
1972
1973 scan_fwmark:
1974 while (++iter->bucket < IP_VS_SVC_TAB_SIZE) {
1975 hlist_for_each_entry_rcu(svc,
1976 &ip_vs_svc_fwm_table[iter->bucket],
1977 f_list)
1978 return svc;
1979 }
1980
1981 return NULL;
1982 }
1983
1984 static void ip_vs_info_seq_stop(struct seq_file *seq, void *v)
1985 __releases(RCU)
1986 {
1987 rcu_read_unlock();
1988 }
1989
1990
1991 static int ip_vs_info_seq_show(struct seq_file *seq, void *v)
1992 {
1993 if (v == SEQ_START_TOKEN) {
1994 seq_printf(seq,
1995 "IP Virtual Server version %d.%d.%d (size=%d)\n",
1996 NVERSION(IP_VS_VERSION_CODE), ip_vs_conn_tab_size);
1997 seq_puts(seq,
1998 "Prot LocalAddress:Port Scheduler Flags\n");
1999 seq_puts(seq,
2000 " -> RemoteAddress:Port Forward Weight ActiveConn InActConn\n");
2001 } else {
2002 const struct ip_vs_service *svc = v;
2003 const struct ip_vs_iter *iter = seq->private;
2004 const struct ip_vs_dest *dest;
2005 struct ip_vs_scheduler *sched = rcu_dereference(svc->scheduler);
2006 char *sched_name = sched ? sched->name : "none";
2007
2008 if (iter->table == ip_vs_svc_table) {
2009 #ifdef CONFIG_IP_VS_IPV6
2010 if (svc->af == AF_INET6)
2011 seq_printf(seq, "%s [%pI6]:%04X %s ",
2012 ip_vs_proto_name(svc->protocol),
2013 &svc->addr.in6,
2014 ntohs(svc->port),
2015 sched_name);
2016 else
2017 #endif
2018 seq_printf(seq, "%s %08X:%04X %s %s ",
2019 ip_vs_proto_name(svc->protocol),
2020 ntohl(svc->addr.ip),
2021 ntohs(svc->port),
2022 sched_name,
2023 (svc->flags & IP_VS_SVC_F_ONEPACKET)?"ops ":"");
2024 } else {
2025 seq_printf(seq, "FWM %08X %s %s",
2026 svc->fwmark, sched_name,
2027 (svc->flags & IP_VS_SVC_F_ONEPACKET)?"ops ":"");
2028 }
2029
2030 if (svc->flags & IP_VS_SVC_F_PERSISTENT)
2031 seq_printf(seq, "persistent %d %08X\n",
2032 svc->timeout,
2033 ntohl(svc->netmask));
2034 else
2035 seq_putc(seq, '\n');
2036
2037 list_for_each_entry_rcu(dest, &svc->destinations, n_list) {
2038 #ifdef CONFIG_IP_VS_IPV6
2039 if (dest->af == AF_INET6)
2040 seq_printf(seq,
2041 " -> [%pI6]:%04X"
2042 " %-7s %-6d %-10d %-10d\n",
2043 &dest->addr.in6,
2044 ntohs(dest->port),
2045 ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
2046 atomic_read(&dest->weight),
2047 atomic_read(&dest->activeconns),
2048 atomic_read(&dest->inactconns));
2049 else
2050 #endif
2051 seq_printf(seq,
2052 " -> %08X:%04X "
2053 "%-7s %-6d %-10d %-10d\n",
2054 ntohl(dest->addr.ip),
2055 ntohs(dest->port),
2056 ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
2057 atomic_read(&dest->weight),
2058 atomic_read(&dest->activeconns),
2059 atomic_read(&dest->inactconns));
2060
2061 }
2062 }
2063 return 0;
2064 }
2065
2066 static const struct seq_operations ip_vs_info_seq_ops = {
2067 .start = ip_vs_info_seq_start,
2068 .next = ip_vs_info_seq_next,
2069 .stop = ip_vs_info_seq_stop,
2070 .show = ip_vs_info_seq_show,
2071 };
2072
2073 static int ip_vs_info_open(struct inode *inode, struct file *file)
2074 {
2075 return seq_open_net(inode, file, &ip_vs_info_seq_ops,
2076 sizeof(struct ip_vs_iter));
2077 }
2078
2079 static const struct file_operations ip_vs_info_fops = {
2080 .owner = THIS_MODULE,
2081 .open = ip_vs_info_open,
2082 .read = seq_read,
2083 .llseek = seq_lseek,
2084 .release = seq_release_net,
2085 };
2086
2087 static int ip_vs_stats_show(struct seq_file *seq, void *v)
2088 {
2089 struct net *net = seq_file_single_net(seq);
2090 struct ip_vs_kstats show;
2091
2092 /* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2093 seq_puts(seq,
2094 " Total Incoming Outgoing Incoming Outgoing\n");
2095 seq_printf(seq,
2096 " Conns Packets Packets Bytes Bytes\n");
2097
2098 ip_vs_copy_stats(&show, &net_ipvs(net)->tot_stats);
2099 seq_printf(seq, "%8LX %8LX %8LX %16LX %16LX\n\n",
2100 (unsigned long long)show.conns,
2101 (unsigned long long)show.inpkts,
2102 (unsigned long long)show.outpkts,
2103 (unsigned long long)show.inbytes,
2104 (unsigned long long)show.outbytes);
2105
2106 /* 01234567 01234567 01234567 0123456701234567 0123456701234567*/
2107 seq_puts(seq,
2108 " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
2109 seq_printf(seq, "%8LX %8LX %8LX %16LX %16LX\n",
2110 (unsigned long long)show.cps,
2111 (unsigned long long)show.inpps,
2112 (unsigned long long)show.outpps,
2113 (unsigned long long)show.inbps,
2114 (unsigned long long)show.outbps);
2115
2116 return 0;
2117 }
2118
2119 static int ip_vs_stats_seq_open(struct inode *inode, struct file *file)
2120 {
2121 return single_open_net(inode, file, ip_vs_stats_show);
2122 }
2123
2124 static const struct file_operations ip_vs_stats_fops = {
2125 .owner = THIS_MODULE,
2126 .open = ip_vs_stats_seq_open,
2127 .read = seq_read,
2128 .llseek = seq_lseek,
2129 .release = single_release_net,
2130 };
2131
2132 static int ip_vs_stats_percpu_show(struct seq_file *seq, void *v)
2133 {
2134 struct net *net = seq_file_single_net(seq);
2135 struct ip_vs_stats *tot_stats = &net_ipvs(net)->tot_stats;
2136 struct ip_vs_cpu_stats __percpu *cpustats = tot_stats->cpustats;
2137 struct ip_vs_kstats kstats;
2138 int i;
2139
2140 /* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2141 seq_puts(seq,
2142 " Total Incoming Outgoing Incoming Outgoing\n");
2143 seq_printf(seq,
2144 "CPU Conns Packets Packets Bytes Bytes\n");
2145
2146 for_each_possible_cpu(i) {
2147 struct ip_vs_cpu_stats *u = per_cpu_ptr(cpustats, i);
2148 unsigned int start;
2149 u64 conns, inpkts, outpkts, inbytes, outbytes;
2150
2151 do {
2152 start = u64_stats_fetch_begin_irq(&u->syncp);
2153 conns = u->cnt.conns;
2154 inpkts = u->cnt.inpkts;
2155 outpkts = u->cnt.outpkts;
2156 inbytes = u->cnt.inbytes;
2157 outbytes = u->cnt.outbytes;
2158 } while (u64_stats_fetch_retry_irq(&u->syncp, start));
2159
2160 seq_printf(seq, "%3X %8LX %8LX %8LX %16LX %16LX\n",
2161 i, (u64)conns, (u64)inpkts,
2162 (u64)outpkts, (u64)inbytes,
2163 (u64)outbytes);
2164 }
2165
2166 ip_vs_copy_stats(&kstats, tot_stats);
2167
2168 seq_printf(seq, " ~ %8LX %8LX %8LX %16LX %16LX\n\n",
2169 (unsigned long long)kstats.conns,
2170 (unsigned long long)kstats.inpkts,
2171 (unsigned long long)kstats.outpkts,
2172 (unsigned long long)kstats.inbytes,
2173 (unsigned long long)kstats.outbytes);
2174
2175 /* ... 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2176 seq_puts(seq,
2177 " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
2178 seq_printf(seq, " %8LX %8LX %8LX %16LX %16LX\n",
2179 kstats.cps,
2180 kstats.inpps,
2181 kstats.outpps,
2182 kstats.inbps,
2183 kstats.outbps);
2184
2185 return 0;
2186 }
2187
2188 static int ip_vs_stats_percpu_seq_open(struct inode *inode, struct file *file)
2189 {
2190 return single_open_net(inode, file, ip_vs_stats_percpu_show);
2191 }
2192
2193 static const struct file_operations ip_vs_stats_percpu_fops = {
2194 .owner = THIS_MODULE,
2195 .open = ip_vs_stats_percpu_seq_open,
2196 .read = seq_read,
2197 .llseek = seq_lseek,
2198 .release = single_release_net,
2199 };
2200 #endif
2201
2202 /*
2203 * Set timeout values for tcp tcpfin udp in the timeout_table.
2204 */
2205 static int ip_vs_set_timeout(struct netns_ipvs *ipvs, struct ip_vs_timeout_user *u)
2206 {
2207 #if defined(CONFIG_IP_VS_PROTO_TCP) || defined(CONFIG_IP_VS_PROTO_UDP)
2208 struct ip_vs_proto_data *pd;
2209 #endif
2210
2211 IP_VS_DBG(2, "Setting timeout tcp:%d tcpfin:%d udp:%d\n",
2212 u->tcp_timeout,
2213 u->tcp_fin_timeout,
2214 u->udp_timeout);
2215
2216 #ifdef CONFIG_IP_VS_PROTO_TCP
2217 if (u->tcp_timeout) {
2218 pd = ip_vs_proto_data_get(ipvs, IPPROTO_TCP);
2219 pd->timeout_table[IP_VS_TCP_S_ESTABLISHED]
2220 = u->tcp_timeout * HZ;
2221 }
2222
2223 if (u->tcp_fin_timeout) {
2224 pd = ip_vs_proto_data_get(ipvs, IPPROTO_TCP);
2225 pd->timeout_table[IP_VS_TCP_S_FIN_WAIT]
2226 = u->tcp_fin_timeout * HZ;
2227 }
2228 #endif
2229
2230 #ifdef CONFIG_IP_VS_PROTO_UDP
2231 if (u->udp_timeout) {
2232 pd = ip_vs_proto_data_get(ipvs, IPPROTO_UDP);
2233 pd->timeout_table[IP_VS_UDP_S_NORMAL]
2234 = u->udp_timeout * HZ;
2235 }
2236 #endif
2237 return 0;
2238 }
2239
2240 #define CMDID(cmd) (cmd - IP_VS_BASE_CTL)
2241
2242 struct ip_vs_svcdest_user {
2243 struct ip_vs_service_user s;
2244 struct ip_vs_dest_user d;
2245 };
2246
2247 static const unsigned char set_arglen[CMDID(IP_VS_SO_SET_MAX) + 1] = {
2248 [CMDID(IP_VS_SO_SET_ADD)] = sizeof(struct ip_vs_service_user),
2249 [CMDID(IP_VS_SO_SET_EDIT)] = sizeof(struct ip_vs_service_user),
2250 [CMDID(IP_VS_SO_SET_DEL)] = sizeof(struct ip_vs_service_user),
2251 [CMDID(IP_VS_SO_SET_ADDDEST)] = sizeof(struct ip_vs_svcdest_user),
2252 [CMDID(IP_VS_SO_SET_DELDEST)] = sizeof(struct ip_vs_svcdest_user),
2253 [CMDID(IP_VS_SO_SET_EDITDEST)] = sizeof(struct ip_vs_svcdest_user),
2254 [CMDID(IP_VS_SO_SET_TIMEOUT)] = sizeof(struct ip_vs_timeout_user),
2255 [CMDID(IP_VS_SO_SET_STARTDAEMON)] = sizeof(struct ip_vs_daemon_user),
2256 [CMDID(IP_VS_SO_SET_STOPDAEMON)] = sizeof(struct ip_vs_daemon_user),
2257 [CMDID(IP_VS_SO_SET_ZERO)] = sizeof(struct ip_vs_service_user),
2258 };
2259
2260 union ip_vs_set_arglen {
2261 struct ip_vs_service_user field_IP_VS_SO_SET_ADD;
2262 struct ip_vs_service_user field_IP_VS_SO_SET_EDIT;
2263 struct ip_vs_service_user field_IP_VS_SO_SET_DEL;
2264 struct ip_vs_svcdest_user field_IP_VS_SO_SET_ADDDEST;
2265 struct ip_vs_svcdest_user field_IP_VS_SO_SET_DELDEST;
2266 struct ip_vs_svcdest_user field_IP_VS_SO_SET_EDITDEST;
2267 struct ip_vs_timeout_user field_IP_VS_SO_SET_TIMEOUT;
2268 struct ip_vs_daemon_user field_IP_VS_SO_SET_STARTDAEMON;
2269 struct ip_vs_daemon_user field_IP_VS_SO_SET_STOPDAEMON;
2270 struct ip_vs_service_user field_IP_VS_SO_SET_ZERO;
2271 };
2272
2273 #define MAX_SET_ARGLEN sizeof(union ip_vs_set_arglen)
2274
2275 static void ip_vs_copy_usvc_compat(struct ip_vs_service_user_kern *usvc,
2276 struct ip_vs_service_user *usvc_compat)
2277 {
2278 memset(usvc, 0, sizeof(*usvc));
2279
2280 usvc->af = AF_INET;
2281 usvc->protocol = usvc_compat->protocol;
2282 usvc->addr.ip = usvc_compat->addr;
2283 usvc->port = usvc_compat->port;
2284 usvc->fwmark = usvc_compat->fwmark;
2285
2286 /* Deep copy of sched_name is not needed here */
2287 usvc->sched_name = usvc_compat->sched_name;
2288
2289 usvc->flags = usvc_compat->flags;
2290 usvc->timeout = usvc_compat->timeout;
2291 usvc->netmask = usvc_compat->netmask;
2292 }
2293
2294 static void ip_vs_copy_udest_compat(struct ip_vs_dest_user_kern *udest,
2295 struct ip_vs_dest_user *udest_compat)
2296 {
2297 memset(udest, 0, sizeof(*udest));
2298
2299 udest->addr.ip = udest_compat->addr;
2300 udest->port = udest_compat->port;
2301 udest->conn_flags = udest_compat->conn_flags;
2302 udest->weight = udest_compat->weight;
2303 udest->u_threshold = udest_compat->u_threshold;
2304 udest->l_threshold = udest_compat->l_threshold;
2305 udest->af = AF_INET;
2306 }
2307
2308 static int
2309 do_ip_vs_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len)
2310 {
2311 struct net *net = sock_net(sk);
2312 int ret;
2313 unsigned char arg[MAX_SET_ARGLEN];
2314 struct ip_vs_service_user *usvc_compat;
2315 struct ip_vs_service_user_kern usvc;
2316 struct ip_vs_service *svc;
2317 struct ip_vs_dest_user *udest_compat;
2318 struct ip_vs_dest_user_kern udest;
2319 struct netns_ipvs *ipvs = net_ipvs(net);
2320
2321 BUILD_BUG_ON(sizeof(arg) > 255);
2322 if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
2323 return -EPERM;
2324
2325 if (cmd < IP_VS_BASE_CTL || cmd > IP_VS_SO_SET_MAX)
2326 return -EINVAL;
2327 if (len != set_arglen[CMDID(cmd)]) {
2328 IP_VS_DBG(1, "set_ctl: len %u != %u\n",
2329 len, set_arglen[CMDID(cmd)]);
2330 return -EINVAL;
2331 }
2332
2333 if (copy_from_user(arg, user, len) != 0)
2334 return -EFAULT;
2335
2336 /* increase the module use count */
2337 ip_vs_use_count_inc();
2338
2339 /* Handle daemons since they have another lock */
2340 if (cmd == IP_VS_SO_SET_STARTDAEMON ||
2341 cmd == IP_VS_SO_SET_STOPDAEMON) {
2342 struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg;
2343
2344 if (cmd == IP_VS_SO_SET_STARTDAEMON) {
2345 struct ipvs_sync_daemon_cfg cfg;
2346
2347 memset(&cfg, 0, sizeof(cfg));
2348 strlcpy(cfg.mcast_ifn, dm->mcast_ifn,
2349 sizeof(cfg.mcast_ifn));
2350 cfg.syncid = dm->syncid;
2351 rtnl_lock();
2352 mutex_lock(&ipvs->sync_mutex);
2353 ret = start_sync_thread(net, &cfg, dm->state);
2354 mutex_unlock(&ipvs->sync_mutex);
2355 rtnl_unlock();
2356 } else {
2357 mutex_lock(&ipvs->sync_mutex);
2358 ret = stop_sync_thread(net, dm->state);
2359 mutex_unlock(&ipvs->sync_mutex);
2360 }
2361 goto out_dec;
2362 }
2363
2364 mutex_lock(&__ip_vs_mutex);
2365 if (cmd == IP_VS_SO_SET_FLUSH) {
2366 /* Flush the virtual service */
2367 ret = ip_vs_flush(ipvs, false);
2368 goto out_unlock;
2369 } else if (cmd == IP_VS_SO_SET_TIMEOUT) {
2370 /* Set timeout values for (tcp tcpfin udp) */
2371 ret = ip_vs_set_timeout(ipvs, (struct ip_vs_timeout_user *)arg);
2372 goto out_unlock;
2373 }
2374
2375 usvc_compat = (struct ip_vs_service_user *)arg;
2376 udest_compat = (struct ip_vs_dest_user *)(usvc_compat + 1);
2377
2378 /* We only use the new structs internally, so copy userspace compat
2379 * structs to extended internal versions */
2380 ip_vs_copy_usvc_compat(&usvc, usvc_compat);
2381 ip_vs_copy_udest_compat(&udest, udest_compat);
2382
2383 if (cmd == IP_VS_SO_SET_ZERO) {
2384 /* if no service address is set, zero counters in all */
2385 if (!usvc.fwmark && !usvc.addr.ip && !usvc.port) {
2386 ret = ip_vs_zero_all(ipvs);
2387 goto out_unlock;
2388 }
2389 }
2390
2391 /* Check for valid protocol: TCP or UDP or SCTP, even for fwmark!=0 */
2392 if (usvc.protocol != IPPROTO_TCP && usvc.protocol != IPPROTO_UDP &&
2393 usvc.protocol != IPPROTO_SCTP) {
2394 pr_err("set_ctl: invalid protocol: %d %pI4:%d %s\n",
2395 usvc.protocol, &usvc.addr.ip,
2396 ntohs(usvc.port), usvc.sched_name);
2397 ret = -EFAULT;
2398 goto out_unlock;
2399 }
2400
2401 /* Lookup the exact service by <protocol, addr, port> or fwmark */
2402 rcu_read_lock();
2403 if (usvc.fwmark == 0)
2404 svc = __ip_vs_service_find(ipvs, usvc.af, usvc.protocol,
2405 &usvc.addr, usvc.port);
2406 else
2407 svc = __ip_vs_svc_fwm_find(ipvs, usvc.af, usvc.fwmark);
2408 rcu_read_unlock();
2409
2410 if (cmd != IP_VS_SO_SET_ADD
2411 && (svc == NULL || svc->protocol != usvc.protocol)) {
2412 ret = -ESRCH;
2413 goto out_unlock;
2414 }
2415
2416 switch (cmd) {
2417 case IP_VS_SO_SET_ADD:
2418 if (svc != NULL)
2419 ret = -EEXIST;
2420 else
2421 ret = ip_vs_add_service(ipvs, &usvc, &svc);
2422 break;
2423 case IP_VS_SO_SET_EDIT:
2424 ret = ip_vs_edit_service(svc, &usvc);
2425 break;
2426 case IP_VS_SO_SET_DEL:
2427 ret = ip_vs_del_service(svc);
2428 if (!ret)
2429 goto out_unlock;
2430 break;
2431 case IP_VS_SO_SET_ZERO:
2432 ret = ip_vs_zero_service(svc);
2433 break;
2434 case IP_VS_SO_SET_ADDDEST:
2435 ret = ip_vs_add_dest(svc, &udest);
2436 break;
2437 case IP_VS_SO_SET_EDITDEST:
2438 ret = ip_vs_edit_dest(svc, &udest);
2439 break;
2440 case IP_VS_SO_SET_DELDEST:
2441 ret = ip_vs_del_dest(svc, &udest);
2442 break;
2443 default:
2444 ret = -EINVAL;
2445 }
2446
2447 out_unlock:
2448 mutex_unlock(&__ip_vs_mutex);
2449 out_dec:
2450 /* decrease the module use count */
2451 ip_vs_use_count_dec();
2452
2453 return ret;
2454 }
2455
2456
2457 static void
2458 ip_vs_copy_service(struct ip_vs_service_entry *dst, struct ip_vs_service *src)
2459 {
2460 struct ip_vs_scheduler *sched;
2461 struct ip_vs_kstats kstats;
2462 char *sched_name;
2463
2464 sched = rcu_dereference_protected(src->scheduler, 1);
2465 sched_name = sched ? sched->name : "none";
2466 dst->protocol = src->protocol;
2467 dst->addr = src->addr.ip;
2468 dst->port = src->port;
2469 dst->fwmark = src->fwmark;
2470 strlcpy(dst->sched_name, sched_name, sizeof(dst->sched_name));
2471 dst->flags = src->flags;
2472 dst->timeout = src->timeout / HZ;
2473 dst->netmask = src->netmask;
2474 dst->num_dests = src->num_dests;
2475 ip_vs_copy_stats(&kstats, &src->stats);
2476 ip_vs_export_stats_user(&dst->stats, &kstats);
2477 }
2478
2479 static inline int
2480 __ip_vs_get_service_entries(struct netns_ipvs *ipvs,
2481 const struct ip_vs_get_services *get,
2482 struct ip_vs_get_services __user *uptr)
2483 {
2484 int idx, count=0;
2485 struct ip_vs_service *svc;
2486 struct ip_vs_service_entry entry;
2487 int ret = 0;
2488
2489 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
2490 hlist_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
2491 /* Only expose IPv4 entries to old interface */
2492 if (svc->af != AF_INET || (svc->ipvs != ipvs))
2493 continue;
2494
2495 if (count >= get->num_services)
2496 goto out;
2497 memset(&entry, 0, sizeof(entry));
2498 ip_vs_copy_service(&entry, svc);
2499 if (copy_to_user(&uptr->entrytable[count],
2500 &entry, sizeof(entry))) {
2501 ret = -EFAULT;
2502 goto out;
2503 }
2504 count++;
2505 }
2506 }
2507
2508 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
2509 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
2510 /* Only expose IPv4 entries to old interface */
2511 if (svc->af != AF_INET || (svc->ipvs != ipvs))
2512 continue;
2513
2514 if (count >= get->num_services)
2515 goto out;
2516 memset(&entry, 0, sizeof(entry));
2517 ip_vs_copy_service(&entry, svc);
2518 if (copy_to_user(&uptr->entrytable[count],
2519 &entry, sizeof(entry))) {
2520 ret = -EFAULT;
2521 goto out;
2522 }
2523 count++;
2524 }
2525 }
2526 out:
2527 return ret;
2528 }
2529
2530 static inline int
2531 __ip_vs_get_dest_entries(struct netns_ipvs *ipvs, const struct ip_vs_get_dests *get,
2532 struct ip_vs_get_dests __user *uptr)
2533 {
2534 struct ip_vs_service *svc;
2535 union nf_inet_addr addr = { .ip = get->addr };
2536 int ret = 0;
2537
2538 rcu_read_lock();
2539 if (get->fwmark)
2540 svc = __ip_vs_svc_fwm_find(ipvs, AF_INET, get->fwmark);
2541 else
2542 svc = __ip_vs_service_find(ipvs, AF_INET, get->protocol, &addr,
2543 get->port);
2544 rcu_read_unlock();
2545
2546 if (svc) {
2547 int count = 0;
2548 struct ip_vs_dest *dest;
2549 struct ip_vs_dest_entry entry;
2550 struct ip_vs_kstats kstats;
2551
2552 memset(&entry, 0, sizeof(entry));
2553 list_for_each_entry(dest, &svc->destinations, n_list) {
2554 if (count >= get->num_dests)
2555 break;
2556
2557 /* Cannot expose heterogeneous members via sockopt
2558 * interface
2559 */
2560 if (dest->af != svc->af)
2561 continue;
2562
2563 entry.addr = dest->addr.ip;
2564 entry.port = dest->port;
2565 entry.conn_flags = atomic_read(&dest->conn_flags);
2566 entry.weight = atomic_read(&dest->weight);
2567 entry.u_threshold = dest->u_threshold;
2568 entry.l_threshold = dest->l_threshold;
2569 entry.activeconns = atomic_read(&dest->activeconns);
2570 entry.inactconns = atomic_read(&dest->inactconns);
2571 entry.persistconns = atomic_read(&dest->persistconns);
2572 ip_vs_copy_stats(&kstats, &dest->stats);
2573 ip_vs_export_stats_user(&entry.stats, &kstats);
2574 if (copy_to_user(&uptr->entrytable[count],
2575 &entry, sizeof(entry))) {
2576 ret = -EFAULT;
2577 break;
2578 }
2579 count++;
2580 }
2581 } else
2582 ret = -ESRCH;
2583 return ret;
2584 }
2585
2586 static inline void
2587 __ip_vs_get_timeouts(struct netns_ipvs *ipvs, struct ip_vs_timeout_user *u)
2588 {
2589 #if defined(CONFIG_IP_VS_PROTO_TCP) || defined(CONFIG_IP_VS_PROTO_UDP)
2590 struct ip_vs_proto_data *pd;
2591 #endif
2592
2593 memset(u, 0, sizeof (*u));
2594
2595 #ifdef CONFIG_IP_VS_PROTO_TCP
2596 pd = ip_vs_proto_data_get(ipvs, IPPROTO_TCP);
2597 u->tcp_timeout = pd->timeout_table[IP_VS_TCP_S_ESTABLISHED] / HZ;
2598 u->tcp_fin_timeout = pd->timeout_table[IP_VS_TCP_S_FIN_WAIT] / HZ;
2599 #endif
2600 #ifdef CONFIG_IP_VS_PROTO_UDP
2601 pd = ip_vs_proto_data_get(ipvs, IPPROTO_UDP);
2602 u->udp_timeout =
2603 pd->timeout_table[IP_VS_UDP_S_NORMAL] / HZ;
2604 #endif
2605 }
2606
2607 static const unsigned char get_arglen[CMDID(IP_VS_SO_GET_MAX) + 1] = {
2608 [CMDID(IP_VS_SO_GET_VERSION)] = 64,
2609 [CMDID(IP_VS_SO_GET_INFO)] = sizeof(struct ip_vs_getinfo),
2610 [CMDID(IP_VS_SO_GET_SERVICES)] = sizeof(struct ip_vs_get_services),
2611 [CMDID(IP_VS_SO_GET_SERVICE)] = sizeof(struct ip_vs_service_entry),
2612 [CMDID(IP_VS_SO_GET_DESTS)] = sizeof(struct ip_vs_get_dests),
2613 [CMDID(IP_VS_SO_GET_TIMEOUT)] = sizeof(struct ip_vs_timeout_user),
2614 [CMDID(IP_VS_SO_GET_DAEMON)] = 2 * sizeof(struct ip_vs_daemon_user),
2615 };
2616
2617 union ip_vs_get_arglen {
2618 char field_IP_VS_SO_GET_VERSION[64];
2619 struct ip_vs_getinfo field_IP_VS_SO_GET_INFO;
2620 struct ip_vs_get_services field_IP_VS_SO_GET_SERVICES;
2621 struct ip_vs_service_entry field_IP_VS_SO_GET_SERVICE;
2622 struct ip_vs_get_dests field_IP_VS_SO_GET_DESTS;
2623 struct ip_vs_timeout_user field_IP_VS_SO_GET_TIMEOUT;
2624 struct ip_vs_daemon_user field_IP_VS_SO_GET_DAEMON[2];
2625 };
2626
2627 #define MAX_GET_ARGLEN sizeof(union ip_vs_get_arglen)
2628
2629 static int
2630 do_ip_vs_get_ctl(struct sock *sk, int cmd, void __user *user, int *len)
2631 {
2632 unsigned char arg[MAX_GET_ARGLEN];
2633 int ret = 0;
2634 unsigned int copylen;
2635 struct net *net = sock_net(sk);
2636 struct netns_ipvs *ipvs = net_ipvs(net);
2637
2638 BUG_ON(!net);
2639 BUILD_BUG_ON(sizeof(arg) > 255);
2640 if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
2641 return -EPERM;
2642
2643 if (cmd < IP_VS_BASE_CTL || cmd > IP_VS_SO_GET_MAX)
2644 return -EINVAL;
2645
2646 copylen = get_arglen[CMDID(cmd)];
2647 if (*len < (int) copylen) {
2648 IP_VS_DBG(1, "get_ctl: len %d < %u\n", *len, copylen);
2649 return -EINVAL;
2650 }
2651
2652 if (copy_from_user(arg, user, copylen) != 0)
2653 return -EFAULT;
2654 /*
2655 * Handle daemons first since it has its own locking
2656 */
2657 if (cmd == IP_VS_SO_GET_DAEMON) {
2658 struct ip_vs_daemon_user d[2];
2659
2660 memset(&d, 0, sizeof(d));
2661 mutex_lock(&ipvs->sync_mutex);
2662 if (ipvs->sync_state & IP_VS_STATE_MASTER) {
2663 d[0].state = IP_VS_STATE_MASTER;
2664 strlcpy(d[0].mcast_ifn, ipvs->mcfg.mcast_ifn,
2665 sizeof(d[0].mcast_ifn));
2666 d[0].syncid = ipvs->mcfg.syncid;
2667 }
2668 if (ipvs->sync_state & IP_VS_STATE_BACKUP) {
2669 d[1].state = IP_VS_STATE_BACKUP;
2670 strlcpy(d[1].mcast_ifn, ipvs->bcfg.mcast_ifn,
2671 sizeof(d[1].mcast_ifn));
2672 d[1].syncid = ipvs->bcfg.syncid;
2673 }
2674 if (copy_to_user(user, &d, sizeof(d)) != 0)
2675 ret = -EFAULT;
2676 mutex_unlock(&ipvs->sync_mutex);
2677 return ret;
2678 }
2679
2680 mutex_lock(&__ip_vs_mutex);
2681 switch (cmd) {
2682 case IP_VS_SO_GET_VERSION:
2683 {
2684 char buf[64];
2685
2686 sprintf(buf, "IP Virtual Server version %d.%d.%d (size=%d)",
2687 NVERSION(IP_VS_VERSION_CODE), ip_vs_conn_tab_size);
2688 if (copy_to_user(user, buf, strlen(buf)+1) != 0) {
2689 ret = -EFAULT;
2690 goto out;
2691 }
2692 *len = strlen(buf)+1;
2693 }
2694 break;
2695
2696 case IP_VS_SO_GET_INFO:
2697 {
2698 struct ip_vs_getinfo info;
2699 info.version = IP_VS_VERSION_CODE;
2700 info.size = ip_vs_conn_tab_size;
2701 info.num_services = ipvs->num_services;
2702 if (copy_to_user(user, &info, sizeof(info)) != 0)
2703 ret = -EFAULT;
2704 }
2705 break;
2706
2707 case IP_VS_SO_GET_SERVICES:
2708 {
2709 struct ip_vs_get_services *get;
2710 int size;
2711
2712 get = (struct ip_vs_get_services *)arg;
2713 size = sizeof(*get) +
2714 sizeof(struct ip_vs_service_entry) * get->num_services;
2715 if (*len != size) {
2716 pr_err("length: %u != %u\n", *len, size);
2717 ret = -EINVAL;
2718 goto out;
2719 }
2720 ret = __ip_vs_get_service_entries(ipvs, get, user);
2721 }
2722 break;
2723
2724 case IP_VS_SO_GET_SERVICE:
2725 {
2726 struct ip_vs_service_entry *entry;
2727 struct ip_vs_service *svc;
2728 union nf_inet_addr addr;
2729
2730 entry = (struct ip_vs_service_entry *)arg;
2731 addr.ip = entry->addr;
2732 rcu_read_lock();
2733 if (entry->fwmark)
2734 svc = __ip_vs_svc_fwm_find(ipvs, AF_INET, entry->fwmark);
2735 else
2736 svc = __ip_vs_service_find(ipvs, AF_INET,
2737 entry->protocol, &addr,
2738 entry->port);
2739 rcu_read_unlock();
2740 if (svc) {
2741 ip_vs_copy_service(entry, svc);
2742 if (copy_to_user(user, entry, sizeof(*entry)) != 0)
2743 ret = -EFAULT;
2744 } else
2745 ret = -ESRCH;
2746 }
2747 break;
2748
2749 case IP_VS_SO_GET_DESTS:
2750 {
2751 struct ip_vs_get_dests *get;
2752 int size;
2753
2754 get = (struct ip_vs_get_dests *)arg;
2755 size = sizeof(*get) +
2756 sizeof(struct ip_vs_dest_entry) * get->num_dests;
2757 if (*len != size) {
2758 pr_err("length: %u != %u\n", *len, size);
2759 ret = -EINVAL;
2760 goto out;
2761 }
2762 ret = __ip_vs_get_dest_entries(ipvs, get, user);
2763 }
2764 break;
2765
2766 case IP_VS_SO_GET_TIMEOUT:
2767 {
2768 struct ip_vs_timeout_user t;
2769
2770 __ip_vs_get_timeouts(ipvs, &t);
2771 if (copy_to_user(user, &t, sizeof(t)) != 0)
2772 ret = -EFAULT;
2773 }
2774 break;
2775
2776 default:
2777 ret = -EINVAL;
2778 }
2779
2780 out:
2781 mutex_unlock(&__ip_vs_mutex);
2782 return ret;
2783 }
2784
2785
2786 static struct nf_sockopt_ops ip_vs_sockopts = {
2787 .pf = PF_INET,
2788 .set_optmin = IP_VS_BASE_CTL,
2789 .set_optmax = IP_VS_SO_SET_MAX+1,
2790 .set = do_ip_vs_set_ctl,
2791 .get_optmin = IP_VS_BASE_CTL,
2792 .get_optmax = IP_VS_SO_GET_MAX+1,
2793 .get = do_ip_vs_get_ctl,
2794 .owner = THIS_MODULE,
2795 };
2796
2797 /*
2798 * Generic Netlink interface
2799 */
2800
2801 /* IPVS genetlink family */
2802 static struct genl_family ip_vs_genl_family = {
2803 .id = GENL_ID_GENERATE,
2804 .hdrsize = 0,
2805 .name = IPVS_GENL_NAME,
2806 .version = IPVS_GENL_VERSION,
2807 .maxattr = IPVS_CMD_MAX,
2808 .netnsok = true, /* Make ipvsadm to work on netns */
2809 };
2810
2811 /* Policy used for first-level command attributes */
2812 static const struct nla_policy ip_vs_cmd_policy[IPVS_CMD_ATTR_MAX + 1] = {
2813 [IPVS_CMD_ATTR_SERVICE] = { .type = NLA_NESTED },
2814 [IPVS_CMD_ATTR_DEST] = { .type = NLA_NESTED },
2815 [IPVS_CMD_ATTR_DAEMON] = { .type = NLA_NESTED },
2816 [IPVS_CMD_ATTR_TIMEOUT_TCP] = { .type = NLA_U32 },
2817 [IPVS_CMD_ATTR_TIMEOUT_TCP_FIN] = { .type = NLA_U32 },
2818 [IPVS_CMD_ATTR_TIMEOUT_UDP] = { .type = NLA_U32 },
2819 };
2820
2821 /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DAEMON */
2822 static const struct nla_policy ip_vs_daemon_policy[IPVS_DAEMON_ATTR_MAX + 1] = {
2823 [IPVS_DAEMON_ATTR_STATE] = { .type = NLA_U32 },
2824 [IPVS_DAEMON_ATTR_MCAST_IFN] = { .type = NLA_NUL_STRING,
2825 .len = IP_VS_IFNAME_MAXLEN },
2826 [IPVS_DAEMON_ATTR_SYNC_ID] = { .type = NLA_U32 },
2827 [IPVS_DAEMON_ATTR_SYNC_MAXLEN] = { .type = NLA_U16 },
2828 [IPVS_DAEMON_ATTR_MCAST_GROUP] = { .type = NLA_U32 },
2829 [IPVS_DAEMON_ATTR_MCAST_GROUP6] = { .len = sizeof(struct in6_addr) },
2830 [IPVS_DAEMON_ATTR_MCAST_PORT] = { .type = NLA_U16 },
2831 [IPVS_DAEMON_ATTR_MCAST_TTL] = { .type = NLA_U8 },
2832 };
2833
2834 /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_SERVICE */
2835 static const struct nla_policy ip_vs_svc_policy[IPVS_SVC_ATTR_MAX + 1] = {
2836 [IPVS_SVC_ATTR_AF] = { .type = NLA_U16 },
2837 [IPVS_SVC_ATTR_PROTOCOL] = { .type = NLA_U16 },
2838 [IPVS_SVC_ATTR_ADDR] = { .type = NLA_BINARY,
2839 .len = sizeof(union nf_inet_addr) },
2840 [IPVS_SVC_ATTR_PORT] = { .type = NLA_U16 },
2841 [IPVS_SVC_ATTR_FWMARK] = { .type = NLA_U32 },
2842 [IPVS_SVC_ATTR_SCHED_NAME] = { .type = NLA_NUL_STRING,
2843 .len = IP_VS_SCHEDNAME_MAXLEN },
2844 [IPVS_SVC_ATTR_PE_NAME] = { .type = NLA_NUL_STRING,
2845 .len = IP_VS_PENAME_MAXLEN },
2846 [IPVS_SVC_ATTR_FLAGS] = { .type = NLA_BINARY,
2847 .len = sizeof(struct ip_vs_flags) },
2848 [IPVS_SVC_ATTR_TIMEOUT] = { .type = NLA_U32 },
2849 [IPVS_SVC_ATTR_NETMASK] = { .type = NLA_U32 },
2850 [IPVS_SVC_ATTR_STATS] = { .type = NLA_NESTED },
2851 };
2852
2853 /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DEST */
2854 static const struct nla_policy ip_vs_dest_policy[IPVS_DEST_ATTR_MAX + 1] = {
2855 [IPVS_DEST_ATTR_ADDR] = { .type = NLA_BINARY,
2856 .len = sizeof(union nf_inet_addr) },
2857 [IPVS_DEST_ATTR_PORT] = { .type = NLA_U16 },
2858 [IPVS_DEST_ATTR_FWD_METHOD] = { .type = NLA_U32 },
2859 [IPVS_DEST_ATTR_WEIGHT] = { .type = NLA_U32 },
2860 [IPVS_DEST_ATTR_U_THRESH] = { .type = NLA_U32 },
2861 [IPVS_DEST_ATTR_L_THRESH] = { .type = NLA_U32 },
2862 [IPVS_DEST_ATTR_ACTIVE_CONNS] = { .type = NLA_U32 },
2863 [IPVS_DEST_ATTR_INACT_CONNS] = { .type = NLA_U32 },
2864 [IPVS_DEST_ATTR_PERSIST_CONNS] = { .type = NLA_U32 },
2865 [IPVS_DEST_ATTR_STATS] = { .type = NLA_NESTED },
2866 [IPVS_DEST_ATTR_ADDR_FAMILY] = { .type = NLA_U16 },
2867 };
2868
2869 static int ip_vs_genl_fill_stats(struct sk_buff *skb, int container_type,
2870 struct ip_vs_kstats *kstats)
2871 {
2872 struct nlattr *nl_stats = nla_nest_start(skb, container_type);
2873
2874 if (!nl_stats)
2875 return -EMSGSIZE;
2876
2877 if (nla_put_u32(skb, IPVS_STATS_ATTR_CONNS, (u32)kstats->conns) ||
2878 nla_put_u32(skb, IPVS_STATS_ATTR_INPKTS, (u32)kstats->inpkts) ||
2879 nla_put_u32(skb, IPVS_STATS_ATTR_OUTPKTS, (u32)kstats->outpkts) ||
2880 nla_put_u64(skb, IPVS_STATS_ATTR_INBYTES, kstats->inbytes) ||
2881 nla_put_u64(skb, IPVS_STATS_ATTR_OUTBYTES, kstats->outbytes) ||
2882 nla_put_u32(skb, IPVS_STATS_ATTR_CPS, (u32)kstats->cps) ||
2883 nla_put_u32(skb, IPVS_STATS_ATTR_INPPS, (u32)kstats->inpps) ||
2884 nla_put_u32(skb, IPVS_STATS_ATTR_OUTPPS, (u32)kstats->outpps) ||
2885 nla_put_u32(skb, IPVS_STATS_ATTR_INBPS, (u32)kstats->inbps) ||
2886 nla_put_u32(skb, IPVS_STATS_ATTR_OUTBPS, (u32)kstats->outbps))
2887 goto nla_put_failure;
2888 nla_nest_end(skb, nl_stats);
2889
2890 return 0;
2891
2892 nla_put_failure:
2893 nla_nest_cancel(skb, nl_stats);
2894 return -EMSGSIZE;
2895 }
2896
2897 static int ip_vs_genl_fill_stats64(struct sk_buff *skb, int container_type,
2898 struct ip_vs_kstats *kstats)
2899 {
2900 struct nlattr *nl_stats = nla_nest_start(skb, container_type);
2901
2902 if (!nl_stats)
2903 return -EMSGSIZE;
2904
2905 if (nla_put_u64(skb, IPVS_STATS_ATTR_CONNS, kstats->conns) ||
2906 nla_put_u64(skb, IPVS_STATS_ATTR_INPKTS, kstats->inpkts) ||
2907 nla_put_u64(skb, IPVS_STATS_ATTR_OUTPKTS, kstats->outpkts) ||
2908 nla_put_u64(skb, IPVS_STATS_ATTR_INBYTES, kstats->inbytes) ||
2909 nla_put_u64(skb, IPVS_STATS_ATTR_OUTBYTES, kstats->outbytes) ||
2910 nla_put_u64(skb, IPVS_STATS_ATTR_CPS, kstats->cps) ||
2911 nla_put_u64(skb, IPVS_STATS_ATTR_INPPS, kstats->inpps) ||
2912 nla_put_u64(skb, IPVS_STATS_ATTR_OUTPPS, kstats->outpps) ||
2913 nla_put_u64(skb, IPVS_STATS_ATTR_INBPS, kstats->inbps) ||
2914 nla_put_u64(skb, IPVS_STATS_ATTR_OUTBPS, kstats->outbps))
2915 goto nla_put_failure;
2916 nla_nest_end(skb, nl_stats);
2917
2918 return 0;
2919
2920 nla_put_failure:
2921 nla_nest_cancel(skb, nl_stats);
2922 return -EMSGSIZE;
2923 }
2924
2925 static int ip_vs_genl_fill_service(struct sk_buff *skb,
2926 struct ip_vs_service *svc)
2927 {
2928 struct ip_vs_scheduler *sched;
2929 struct ip_vs_pe *pe;
2930 struct nlattr *nl_service;
2931 struct ip_vs_flags flags = { .flags = svc->flags,
2932 .mask = ~0 };
2933 struct ip_vs_kstats kstats;
2934 char *sched_name;
2935
2936 nl_service = nla_nest_start(skb, IPVS_CMD_ATTR_SERVICE);
2937 if (!nl_service)
2938 return -EMSGSIZE;
2939
2940 if (nla_put_u16(skb, IPVS_SVC_ATTR_AF, svc->af))
2941 goto nla_put_failure;
2942 if (svc->fwmark) {
2943 if (nla_put_u32(skb, IPVS_SVC_ATTR_FWMARK, svc->fwmark))
2944 goto nla_put_failure;
2945 } else {
2946 if (nla_put_u16(skb, IPVS_SVC_ATTR_PROTOCOL, svc->protocol) ||
2947 nla_put(skb, IPVS_SVC_ATTR_ADDR, sizeof(svc->addr), &svc->addr) ||
2948 nla_put_be16(skb, IPVS_SVC_ATTR_PORT, svc->port))
2949 goto nla_put_failure;
2950 }
2951
2952 sched = rcu_dereference_protected(svc->scheduler, 1);
2953 sched_name = sched ? sched->name : "none";
2954 pe = rcu_dereference_protected(svc->pe, 1);
2955 if (nla_put_string(skb, IPVS_SVC_ATTR_SCHED_NAME, sched_name) ||
2956 (pe && nla_put_string(skb, IPVS_SVC_ATTR_PE_NAME, pe->name)) ||
2957 nla_put(skb, IPVS_SVC_ATTR_FLAGS, sizeof(flags), &flags) ||
2958 nla_put_u32(skb, IPVS_SVC_ATTR_TIMEOUT, svc->timeout / HZ) ||
2959 nla_put_be32(skb, IPVS_SVC_ATTR_NETMASK, svc->netmask))
2960 goto nla_put_failure;
2961 ip_vs_copy_stats(&kstats, &svc->stats);
2962 if (ip_vs_genl_fill_stats(skb, IPVS_SVC_ATTR_STATS, &kstats))
2963 goto nla_put_failure;
2964 if (ip_vs_genl_fill_stats64(skb, IPVS_SVC_ATTR_STATS64, &kstats))
2965 goto nla_put_failure;
2966
2967 nla_nest_end(skb, nl_service);
2968
2969 return 0;
2970
2971 nla_put_failure:
2972 nla_nest_cancel(skb, nl_service);
2973 return -EMSGSIZE;
2974 }
2975
2976 static int ip_vs_genl_dump_service(struct sk_buff *skb,
2977 struct ip_vs_service *svc,
2978 struct netlink_callback *cb)
2979 {
2980 void *hdr;
2981
2982 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
2983 &ip_vs_genl_family, NLM_F_MULTI,
2984 IPVS_CMD_NEW_SERVICE);
2985 if (!hdr)
2986 return -EMSGSIZE;
2987
2988 if (ip_vs_genl_fill_service(skb, svc) < 0)
2989 goto nla_put_failure;
2990
2991 genlmsg_end(skb, hdr);
2992 return 0;
2993
2994 nla_put_failure:
2995 genlmsg_cancel(skb, hdr);
2996 return -EMSGSIZE;
2997 }
2998
2999 static int ip_vs_genl_dump_services(struct sk_buff *skb,
3000 struct netlink_callback *cb)
3001 {
3002 int idx = 0, i;
3003 int start = cb->args[0];
3004 struct ip_vs_service *svc;
3005 struct netns_ipvs *ipvs = net_ipvs(skb_sknet(skb));
3006
3007 mutex_lock(&__ip_vs_mutex);
3008 for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) {
3009 hlist_for_each_entry(svc, &ip_vs_svc_table[i], s_list) {
3010 if (++idx <= start || (svc->ipvs != ipvs))
3011 continue;
3012 if (ip_vs_genl_dump_service(skb, svc, cb) < 0) {
3013 idx--;
3014 goto nla_put_failure;
3015 }
3016 }
3017 }
3018
3019 for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) {
3020 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[i], f_list) {
3021 if (++idx <= start || (svc->ipvs != ipvs))
3022 continue;
3023 if (ip_vs_genl_dump_service(skb, svc, cb) < 0) {
3024 idx--;
3025 goto nla_put_failure;
3026 }
3027 }
3028 }
3029
3030 nla_put_failure:
3031 mutex_unlock(&__ip_vs_mutex);
3032 cb->args[0] = idx;
3033
3034 return skb->len;
3035 }
3036
3037 static int ip_vs_genl_parse_service(struct netns_ipvs *ipvs,
3038 struct ip_vs_service_user_kern *usvc,
3039 struct nlattr *nla, int full_entry,
3040 struct ip_vs_service **ret_svc)
3041 {
3042 struct nlattr *attrs[IPVS_SVC_ATTR_MAX + 1];
3043 struct nlattr *nla_af, *nla_port, *nla_fwmark, *nla_protocol, *nla_addr;
3044 struct ip_vs_service *svc;
3045
3046 /* Parse mandatory identifying service fields first */
3047 if (nla == NULL ||
3048 nla_parse_nested(attrs, IPVS_SVC_ATTR_MAX, nla, ip_vs_svc_policy))
3049 return -EINVAL;
3050
3051 nla_af = attrs[IPVS_SVC_ATTR_AF];
3052 nla_protocol = attrs[IPVS_SVC_ATTR_PROTOCOL];
3053 nla_addr = attrs[IPVS_SVC_ATTR_ADDR];
3054 nla_port = attrs[IPVS_SVC_ATTR_PORT];
3055 nla_fwmark = attrs[IPVS_SVC_ATTR_FWMARK];
3056
3057 if (!(nla_af && (nla_fwmark || (nla_port && nla_protocol && nla_addr))))
3058 return -EINVAL;
3059
3060 memset(usvc, 0, sizeof(*usvc));
3061
3062 usvc->af = nla_get_u16(nla_af);
3063 #ifdef CONFIG_IP_VS_IPV6
3064 if (usvc->af != AF_INET && usvc->af != AF_INET6)
3065 #else
3066 if (usvc->af != AF_INET)
3067 #endif
3068 return -EAFNOSUPPORT;
3069
3070 if (nla_fwmark) {
3071 usvc->protocol = IPPROTO_TCP;
3072 usvc->fwmark = nla_get_u32(nla_fwmark);
3073 } else {
3074 usvc->protocol = nla_get_u16(nla_protocol);
3075 nla_memcpy(&usvc->addr, nla_addr, sizeof(usvc->addr));
3076 usvc->port = nla_get_be16(nla_port);
3077 usvc->fwmark = 0;
3078 }
3079
3080 rcu_read_lock();
3081 if (usvc->fwmark)
3082 svc = __ip_vs_svc_fwm_find(ipvs, usvc->af, usvc->fwmark);
3083 else
3084 svc = __ip_vs_service_find(ipvs, usvc->af, usvc->protocol,
3085 &usvc->addr, usvc->port);
3086 rcu_read_unlock();
3087 *ret_svc = svc;
3088
3089 /* If a full entry was requested, check for the additional fields */
3090 if (full_entry) {
3091 struct nlattr *nla_sched, *nla_flags, *nla_pe, *nla_timeout,
3092 *nla_netmask;
3093 struct ip_vs_flags flags;
3094
3095 nla_sched = attrs[IPVS_SVC_ATTR_SCHED_NAME];
3096 nla_pe = attrs[IPVS_SVC_ATTR_PE_NAME];
3097 nla_flags = attrs[IPVS_SVC_ATTR_FLAGS];
3098 nla_timeout = attrs[IPVS_SVC_ATTR_TIMEOUT];
3099 nla_netmask = attrs[IPVS_SVC_ATTR_NETMASK];
3100
3101 if (!(nla_sched && nla_flags && nla_timeout && nla_netmask))
3102 return -EINVAL;
3103
3104 nla_memcpy(&flags, nla_flags, sizeof(flags));
3105
3106 /* prefill flags from service if it already exists */
3107 if (svc)
3108 usvc->flags = svc->flags;
3109
3110 /* set new flags from userland */
3111 usvc->flags = (usvc->flags & ~flags.mask) |
3112 (flags.flags & flags.mask);
3113 usvc->sched_name = nla_data(nla_sched);
3114 usvc->pe_name = nla_pe ? nla_data(nla_pe) : NULL;
3115 usvc->timeout = nla_get_u32(nla_timeout);
3116 usvc->netmask = nla_get_be32(nla_netmask);
3117 }
3118
3119 return 0;
3120 }
3121
3122 static struct ip_vs_service *ip_vs_genl_find_service(struct netns_ipvs *ipvs,
3123 struct nlattr *nla)
3124 {
3125 struct ip_vs_service_user_kern usvc;
3126 struct ip_vs_service *svc;
3127 int ret;
3128
3129 ret = ip_vs_genl_parse_service(ipvs, &usvc, nla, 0, &svc);
3130 return ret ? ERR_PTR(ret) : svc;
3131 }
3132
3133 static int ip_vs_genl_fill_dest(struct sk_buff *skb, struct ip_vs_dest *dest)
3134 {
3135 struct nlattr *nl_dest;
3136 struct ip_vs_kstats kstats;
3137
3138 nl_dest = nla_nest_start(skb, IPVS_CMD_ATTR_DEST);
3139 if (!nl_dest)
3140 return -EMSGSIZE;
3141
3142 if (nla_put(skb, IPVS_DEST_ATTR_ADDR, sizeof(dest->addr), &dest->addr) ||
3143 nla_put_be16(skb, IPVS_DEST_ATTR_PORT, dest->port) ||
3144 nla_put_u32(skb, IPVS_DEST_ATTR_FWD_METHOD,
3145 (atomic_read(&dest->conn_flags) &
3146 IP_VS_CONN_F_FWD_MASK)) ||
3147 nla_put_u32(skb, IPVS_DEST_ATTR_WEIGHT,
3148 atomic_read(&dest->weight)) ||
3149 nla_put_u32(skb, IPVS_DEST_ATTR_U_THRESH, dest->u_threshold) ||
3150 nla_put_u32(skb, IPVS_DEST_ATTR_L_THRESH, dest->l_threshold) ||
3151 nla_put_u32(skb, IPVS_DEST_ATTR_ACTIVE_CONNS,
3152 atomic_read(&dest->activeconns)) ||
3153 nla_put_u32(skb, IPVS_DEST_ATTR_INACT_CONNS,
3154 atomic_read(&dest->inactconns)) ||
3155 nla_put_u32(skb, IPVS_DEST_ATTR_PERSIST_CONNS,
3156 atomic_read(&dest->persistconns)) ||
3157 nla_put_u16(skb, IPVS_DEST_ATTR_ADDR_FAMILY, dest->af))
3158 goto nla_put_failure;
3159 ip_vs_copy_stats(&kstats, &dest->stats);
3160 if (ip_vs_genl_fill_stats(skb, IPVS_DEST_ATTR_STATS, &kstats))
3161 goto nla_put_failure;
3162 if (ip_vs_genl_fill_stats64(skb, IPVS_DEST_ATTR_STATS64, &kstats))
3163 goto nla_put_failure;
3164
3165 nla_nest_end(skb, nl_dest);
3166
3167 return 0;
3168
3169 nla_put_failure:
3170 nla_nest_cancel(skb, nl_dest);
3171 return -EMSGSIZE;
3172 }
3173
3174 static int ip_vs_genl_dump_dest(struct sk_buff *skb, struct ip_vs_dest *dest,
3175 struct netlink_callback *cb)
3176 {
3177 void *hdr;
3178
3179 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3180 &ip_vs_genl_family, NLM_F_MULTI,
3181 IPVS_CMD_NEW_DEST);
3182 if (!hdr)
3183 return -EMSGSIZE;
3184
3185 if (ip_vs_genl_fill_dest(skb, dest) < 0)
3186 goto nla_put_failure;
3187
3188 genlmsg_end(skb, hdr);
3189 return 0;
3190
3191 nla_put_failure:
3192 genlmsg_cancel(skb, hdr);
3193 return -EMSGSIZE;
3194 }
3195
3196 static int ip_vs_genl_dump_dests(struct sk_buff *skb,
3197 struct netlink_callback *cb)
3198 {
3199 int idx = 0;
3200 int start = cb->args[0];
3201 struct ip_vs_service *svc;
3202 struct ip_vs_dest *dest;
3203 struct nlattr *attrs[IPVS_CMD_ATTR_MAX + 1];
3204 struct net *net = skb_sknet(skb);
3205 struct netns_ipvs *ipvs = net_ipvs(net);
3206
3207 mutex_lock(&__ip_vs_mutex);
3208
3209 /* Try to find the service for which to dump destinations */
3210 if (nlmsg_parse(cb->nlh, GENL_HDRLEN, attrs,
3211 IPVS_CMD_ATTR_MAX, ip_vs_cmd_policy))
3212 goto out_err;
3213
3214
3215 svc = ip_vs_genl_find_service(ipvs, attrs[IPVS_CMD_ATTR_SERVICE]);
3216 if (IS_ERR(svc) || svc == NULL)
3217 goto out_err;
3218
3219 /* Dump the destinations */
3220 list_for_each_entry(dest, &svc->destinations, n_list) {
3221 if (++idx <= start)
3222 continue;
3223 if (ip_vs_genl_dump_dest(skb, dest, cb) < 0) {
3224 idx--;
3225 goto nla_put_failure;
3226 }
3227 }
3228
3229 nla_put_failure:
3230 cb->args[0] = idx;
3231
3232 out_err:
3233 mutex_unlock(&__ip_vs_mutex);
3234
3235 return skb->len;
3236 }
3237
3238 static int ip_vs_genl_parse_dest(struct ip_vs_dest_user_kern *udest,
3239 struct nlattr *nla, int full_entry)
3240 {
3241 struct nlattr *attrs[IPVS_DEST_ATTR_MAX + 1];
3242 struct nlattr *nla_addr, *nla_port;
3243 struct nlattr *nla_addr_family;
3244
3245 /* Parse mandatory identifying destination fields first */
3246 if (nla == NULL ||
3247 nla_parse_nested(attrs, IPVS_DEST_ATTR_MAX, nla, ip_vs_dest_policy))
3248 return -EINVAL;
3249
3250 nla_addr = attrs[IPVS_DEST_ATTR_ADDR];
3251 nla_port = attrs[IPVS_DEST_ATTR_PORT];
3252 nla_addr_family = attrs[IPVS_DEST_ATTR_ADDR_FAMILY];
3253
3254 if (!(nla_addr && nla_port))
3255 return -EINVAL;
3256
3257 memset(udest, 0, sizeof(*udest));
3258
3259 nla_memcpy(&udest->addr, nla_addr, sizeof(udest->addr));
3260 udest->port = nla_get_be16(nla_port);
3261
3262 if (nla_addr_family)
3263 udest->af = nla_get_u16(nla_addr_family);
3264 else
3265 udest->af = 0;
3266
3267 /* If a full entry was requested, check for the additional fields */
3268 if (full_entry) {
3269 struct nlattr *nla_fwd, *nla_weight, *nla_u_thresh,
3270 *nla_l_thresh;
3271
3272 nla_fwd = attrs[IPVS_DEST_ATTR_FWD_METHOD];
3273 nla_weight = attrs[IPVS_DEST_ATTR_WEIGHT];
3274 nla_u_thresh = attrs[IPVS_DEST_ATTR_U_THRESH];
3275 nla_l_thresh = attrs[IPVS_DEST_ATTR_L_THRESH];
3276
3277 if (!(nla_fwd && nla_weight && nla_u_thresh && nla_l_thresh))
3278 return -EINVAL;
3279
3280 udest->conn_flags = nla_get_u32(nla_fwd)
3281 & IP_VS_CONN_F_FWD_MASK;
3282 udest->weight = nla_get_u32(nla_weight);
3283 udest->u_threshold = nla_get_u32(nla_u_thresh);
3284 udest->l_threshold = nla_get_u32(nla_l_thresh);
3285 }
3286
3287 return 0;
3288 }
3289
3290 static int ip_vs_genl_fill_daemon(struct sk_buff *skb, __u32 state,
3291 struct ipvs_sync_daemon_cfg *c)
3292 {
3293 struct nlattr *nl_daemon;
3294
3295 nl_daemon = nla_nest_start(skb, IPVS_CMD_ATTR_DAEMON);
3296 if (!nl_daemon)
3297 return -EMSGSIZE;
3298
3299 if (nla_put_u32(skb, IPVS_DAEMON_ATTR_STATE, state) ||
3300 nla_put_string(skb, IPVS_DAEMON_ATTR_MCAST_IFN, c->mcast_ifn) ||
3301 nla_put_u32(skb, IPVS_DAEMON_ATTR_SYNC_ID, c->syncid) ||
3302 nla_put_u16(skb, IPVS_DAEMON_ATTR_SYNC_MAXLEN, c->sync_maxlen) ||
3303 nla_put_u16(skb, IPVS_DAEMON_ATTR_MCAST_PORT, c->mcast_port) ||
3304 nla_put_u8(skb, IPVS_DAEMON_ATTR_MCAST_TTL, c->mcast_ttl))
3305 goto nla_put_failure;
3306 #ifdef CONFIG_IP_VS_IPV6
3307 if (c->mcast_af == AF_INET6) {
3308 if (nla_put_in6_addr(skb, IPVS_DAEMON_ATTR_MCAST_GROUP6,
3309 &c->mcast_group.in6))
3310 goto nla_put_failure;
3311 } else
3312 #endif
3313 if (c->mcast_af == AF_INET &&
3314 nla_put_in_addr(skb, IPVS_DAEMON_ATTR_MCAST_GROUP,
3315 c->mcast_group.ip))
3316 goto nla_put_failure;
3317 nla_nest_end(skb, nl_daemon);
3318
3319 return 0;
3320
3321 nla_put_failure:
3322 nla_nest_cancel(skb, nl_daemon);
3323 return -EMSGSIZE;
3324 }
3325
3326 static int ip_vs_genl_dump_daemon(struct sk_buff *skb, __u32 state,
3327 struct ipvs_sync_daemon_cfg *c,
3328 struct netlink_callback *cb)
3329 {
3330 void *hdr;
3331 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3332 &ip_vs_genl_family, NLM_F_MULTI,
3333 IPVS_CMD_NEW_DAEMON);
3334 if (!hdr)
3335 return -EMSGSIZE;
3336
3337 if (ip_vs_genl_fill_daemon(skb, state, c))
3338 goto nla_put_failure;
3339
3340 genlmsg_end(skb, hdr);
3341 return 0;
3342
3343 nla_put_failure:
3344 genlmsg_cancel(skb, hdr);
3345 return -EMSGSIZE;
3346 }
3347
3348 static int ip_vs_genl_dump_daemons(struct sk_buff *skb,
3349 struct netlink_callback *cb)
3350 {
3351 struct net *net = skb_sknet(skb);
3352 struct netns_ipvs *ipvs = net_ipvs(net);
3353
3354 mutex_lock(&ipvs->sync_mutex);
3355 if ((ipvs->sync_state & IP_VS_STATE_MASTER) && !cb->args[0]) {
3356 if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_MASTER,
3357 &ipvs->mcfg, cb) < 0)
3358 goto nla_put_failure;
3359
3360 cb->args[0] = 1;
3361 }
3362
3363 if ((ipvs->sync_state & IP_VS_STATE_BACKUP) && !cb->args[1]) {
3364 if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_BACKUP,
3365 &ipvs->bcfg, cb) < 0)
3366 goto nla_put_failure;
3367
3368 cb->args[1] = 1;
3369 }
3370
3371 nla_put_failure:
3372 mutex_unlock(&ipvs->sync_mutex);
3373
3374 return skb->len;
3375 }
3376
3377 static int ip_vs_genl_new_daemon(struct netns_ipvs *ipvs, struct nlattr **attrs)
3378 {
3379 struct ipvs_sync_daemon_cfg c;
3380 struct nlattr *a;
3381 int ret;
3382
3383 memset(&c, 0, sizeof(c));
3384 if (!(attrs[IPVS_DAEMON_ATTR_STATE] &&
3385 attrs[IPVS_DAEMON_ATTR_MCAST_IFN] &&
3386 attrs[IPVS_DAEMON_ATTR_SYNC_ID]))
3387 return -EINVAL;
3388 strlcpy(c.mcast_ifn, nla_data(attrs[IPVS_DAEMON_ATTR_MCAST_IFN]),
3389 sizeof(c.mcast_ifn));
3390 c.syncid = nla_get_u32(attrs[IPVS_DAEMON_ATTR_SYNC_ID]);
3391
3392 a = attrs[IPVS_DAEMON_ATTR_SYNC_MAXLEN];
3393 if (a)
3394 c.sync_maxlen = nla_get_u16(a);
3395
3396 a = attrs[IPVS_DAEMON_ATTR_MCAST_GROUP];
3397 if (a) {
3398 c.mcast_af = AF_INET;
3399 c.mcast_group.ip = nla_get_in_addr(a);
3400 if (!ipv4_is_multicast(c.mcast_group.ip))
3401 return -EINVAL;
3402 } else {
3403 a = attrs[IPVS_DAEMON_ATTR_MCAST_GROUP6];
3404 if (a) {
3405 #ifdef CONFIG_IP_VS_IPV6
3406 int addr_type;
3407
3408 c.mcast_af = AF_INET6;
3409 c.mcast_group.in6 = nla_get_in6_addr(a);
3410 addr_type = ipv6_addr_type(&c.mcast_group.in6);
3411 if (!(addr_type & IPV6_ADDR_MULTICAST))
3412 return -EINVAL;
3413 #else
3414 return -EAFNOSUPPORT;
3415 #endif
3416 }
3417 }
3418
3419 a = attrs[IPVS_DAEMON_ATTR_MCAST_PORT];
3420 if (a)
3421 c.mcast_port = nla_get_u16(a);
3422
3423 a = attrs[IPVS_DAEMON_ATTR_MCAST_TTL];
3424 if (a)
3425 c.mcast_ttl = nla_get_u8(a);
3426
3427 /* The synchronization protocol is incompatible with mixed family
3428 * services
3429 */
3430 if (ipvs->mixed_address_family_dests > 0)
3431 return -EINVAL;
3432
3433 rtnl_lock();
3434 mutex_lock(&ipvs->sync_mutex);
3435 ret = start_sync_thread(ipvs->net, &c,
3436 nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]));
3437 mutex_unlock(&ipvs->sync_mutex);
3438 rtnl_unlock();
3439 return ret;
3440 }
3441
3442 static int ip_vs_genl_del_daemon(struct netns_ipvs *ipvs, struct nlattr **attrs)
3443 {
3444 int ret;
3445
3446 if (!attrs[IPVS_DAEMON_ATTR_STATE])
3447 return -EINVAL;
3448
3449 mutex_lock(&ipvs->sync_mutex);
3450 ret = stop_sync_thread(ipvs->net,
3451 nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]));
3452 mutex_unlock(&ipvs->sync_mutex);
3453 return ret;
3454 }
3455
3456 static int ip_vs_genl_set_config(struct net *net, struct nlattr **attrs)
3457 {
3458 struct netns_ipvs *ipvs = net_ipvs(net);
3459 struct ip_vs_timeout_user t;
3460
3461 __ip_vs_get_timeouts(ipvs, &t);
3462
3463 if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP])
3464 t.tcp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP]);
3465
3466 if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN])
3467 t.tcp_fin_timeout =
3468 nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN]);
3469
3470 if (attrs[IPVS_CMD_ATTR_TIMEOUT_UDP])
3471 t.udp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_UDP]);
3472
3473 return ip_vs_set_timeout(ipvs, &t);
3474 }
3475
3476 static int ip_vs_genl_set_daemon(struct sk_buff *skb, struct genl_info *info)
3477 {
3478 int ret = -EINVAL, cmd;
3479 struct net *net;
3480 struct netns_ipvs *ipvs;
3481
3482 net = skb_sknet(skb);
3483 ipvs = net_ipvs(net);
3484 cmd = info->genlhdr->cmd;
3485
3486 if (cmd == IPVS_CMD_NEW_DAEMON || cmd == IPVS_CMD_DEL_DAEMON) {
3487 struct nlattr *daemon_attrs[IPVS_DAEMON_ATTR_MAX + 1];
3488
3489 if (!info->attrs[IPVS_CMD_ATTR_DAEMON] ||
3490 nla_parse_nested(daemon_attrs, IPVS_DAEMON_ATTR_MAX,
3491 info->attrs[IPVS_CMD_ATTR_DAEMON],
3492 ip_vs_daemon_policy))
3493 goto out;
3494
3495 if (cmd == IPVS_CMD_NEW_DAEMON)
3496 ret = ip_vs_genl_new_daemon(ipvs, daemon_attrs);
3497 else
3498 ret = ip_vs_genl_del_daemon(ipvs, daemon_attrs);
3499 }
3500
3501 out:
3502 return ret;
3503 }
3504
3505 static int ip_vs_genl_set_cmd(struct sk_buff *skb, struct genl_info *info)
3506 {
3507 struct ip_vs_service *svc = NULL;
3508 struct ip_vs_service_user_kern usvc;
3509 struct ip_vs_dest_user_kern udest;
3510 int ret = 0, cmd;
3511 int need_full_svc = 0, need_full_dest = 0;
3512 struct net *net;
3513 struct netns_ipvs *ipvs;
3514
3515 net = skb_sknet(skb);
3516 ipvs = net_ipvs(net);
3517 cmd = info->genlhdr->cmd;
3518
3519 mutex_lock(&__ip_vs_mutex);
3520
3521 if (cmd == IPVS_CMD_FLUSH) {
3522 ret = ip_vs_flush(ipvs, false);
3523 goto out;
3524 } else if (cmd == IPVS_CMD_SET_CONFIG) {
3525 ret = ip_vs_genl_set_config(net, info->attrs);
3526 goto out;
3527 } else if (cmd == IPVS_CMD_ZERO &&
3528 !info->attrs[IPVS_CMD_ATTR_SERVICE]) {
3529 ret = ip_vs_zero_all(ipvs);
3530 goto out;
3531 }
3532
3533 /* All following commands require a service argument, so check if we
3534 * received a valid one. We need a full service specification when
3535 * adding / editing a service. Only identifying members otherwise. */
3536 if (cmd == IPVS_CMD_NEW_SERVICE || cmd == IPVS_CMD_SET_SERVICE)
3537 need_full_svc = 1;
3538
3539 ret = ip_vs_genl_parse_service(ipvs, &usvc,
3540 info->attrs[IPVS_CMD_ATTR_SERVICE],
3541 need_full_svc, &svc);
3542 if (ret)
3543 goto out;
3544
3545 /* Unless we're adding a new service, the service must already exist */
3546 if ((cmd != IPVS_CMD_NEW_SERVICE) && (svc == NULL)) {
3547 ret = -ESRCH;
3548 goto out;
3549 }
3550
3551 /* Destination commands require a valid destination argument. For
3552 * adding / editing a destination, we need a full destination
3553 * specification. */
3554 if (cmd == IPVS_CMD_NEW_DEST || cmd == IPVS_CMD_SET_DEST ||
3555 cmd == IPVS_CMD_DEL_DEST) {
3556 if (cmd != IPVS_CMD_DEL_DEST)
3557 need_full_dest = 1;
3558
3559 ret = ip_vs_genl_parse_dest(&udest,
3560 info->attrs[IPVS_CMD_ATTR_DEST],
3561 need_full_dest);
3562 if (ret)
3563 goto out;
3564
3565 /* Old protocols did not allow the user to specify address
3566 * family, so we set it to zero instead. We also didn't
3567 * allow heterogeneous pools in the old code, so it's safe
3568 * to assume that this will have the same address family as
3569 * the service.
3570 */
3571 if (udest.af == 0)
3572 udest.af = svc->af;
3573
3574 if (udest.af != svc->af && cmd != IPVS_CMD_DEL_DEST) {
3575 /* The synchronization protocol is incompatible
3576 * with mixed family services
3577 */
3578 if (ipvs->sync_state) {
3579 ret = -EINVAL;
3580 goto out;
3581 }
3582
3583 /* Which connection types do we support? */
3584 switch (udest.conn_flags) {
3585 case IP_VS_CONN_F_TUNNEL:
3586 /* We are able to forward this */
3587 break;
3588 default:
3589 ret = -EINVAL;
3590 goto out;
3591 }
3592 }
3593 }
3594
3595 switch (cmd) {
3596 case IPVS_CMD_NEW_SERVICE:
3597 if (svc == NULL)
3598 ret = ip_vs_add_service(ipvs, &usvc, &svc);
3599 else
3600 ret = -EEXIST;
3601 break;
3602 case IPVS_CMD_SET_SERVICE:
3603 ret = ip_vs_edit_service(svc, &usvc);
3604 break;
3605 case IPVS_CMD_DEL_SERVICE:
3606 ret = ip_vs_del_service(svc);
3607 /* do not use svc, it can be freed */
3608 break;
3609 case IPVS_CMD_NEW_DEST:
3610 ret = ip_vs_add_dest(svc, &udest);
3611 break;
3612 case IPVS_CMD_SET_DEST:
3613 ret = ip_vs_edit_dest(svc, &udest);
3614 break;
3615 case IPVS_CMD_DEL_DEST:
3616 ret = ip_vs_del_dest(svc, &udest);
3617 break;
3618 case IPVS_CMD_ZERO:
3619 ret = ip_vs_zero_service(svc);
3620 break;
3621 default:
3622 ret = -EINVAL;
3623 }
3624
3625 out:
3626 mutex_unlock(&__ip_vs_mutex);
3627
3628 return ret;
3629 }
3630
3631 static int ip_vs_genl_get_cmd(struct sk_buff *skb, struct genl_info *info)
3632 {
3633 struct sk_buff *msg;
3634 void *reply;
3635 int ret, cmd, reply_cmd;
3636 struct net *net;
3637 struct netns_ipvs *ipvs;
3638
3639 net = skb_sknet(skb);
3640 ipvs = net_ipvs(net);
3641 cmd = info->genlhdr->cmd;
3642
3643 if (cmd == IPVS_CMD_GET_SERVICE)
3644 reply_cmd = IPVS_CMD_NEW_SERVICE;
3645 else if (cmd == IPVS_CMD_GET_INFO)
3646 reply_cmd = IPVS_CMD_SET_INFO;
3647 else if (cmd == IPVS_CMD_GET_CONFIG)
3648 reply_cmd = IPVS_CMD_SET_CONFIG;
3649 else {
3650 pr_err("unknown Generic Netlink command\n");
3651 return -EINVAL;
3652 }
3653
3654 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3655 if (!msg)
3656 return -ENOMEM;
3657
3658 mutex_lock(&__ip_vs_mutex);
3659
3660 reply = genlmsg_put_reply(msg, info, &ip_vs_genl_family, 0, reply_cmd);
3661 if (reply == NULL)
3662 goto nla_put_failure;
3663
3664 switch (cmd) {
3665 case IPVS_CMD_GET_SERVICE:
3666 {
3667 struct ip_vs_service *svc;
3668
3669 svc = ip_vs_genl_find_service(ipvs,
3670 info->attrs[IPVS_CMD_ATTR_SERVICE]);
3671 if (IS_ERR(svc)) {
3672 ret = PTR_ERR(svc);
3673 goto out_err;
3674 } else if (svc) {
3675 ret = ip_vs_genl_fill_service(msg, svc);
3676 if (ret)
3677 goto nla_put_failure;
3678 } else {
3679 ret = -ESRCH;
3680 goto out_err;
3681 }
3682
3683 break;
3684 }
3685
3686 case IPVS_CMD_GET_CONFIG:
3687 {
3688 struct ip_vs_timeout_user t;
3689
3690 __ip_vs_get_timeouts(ipvs, &t);
3691 #ifdef CONFIG_IP_VS_PROTO_TCP
3692 if (nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP,
3693 t.tcp_timeout) ||
3694 nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP_FIN,
3695 t.tcp_fin_timeout))
3696 goto nla_put_failure;
3697 #endif
3698 #ifdef CONFIG_IP_VS_PROTO_UDP
3699 if (nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_UDP, t.udp_timeout))
3700 goto nla_put_failure;
3701 #endif
3702
3703 break;
3704 }
3705
3706 case IPVS_CMD_GET_INFO:
3707 if (nla_put_u32(msg, IPVS_INFO_ATTR_VERSION,
3708 IP_VS_VERSION_CODE) ||
3709 nla_put_u32(msg, IPVS_INFO_ATTR_CONN_TAB_SIZE,
3710 ip_vs_conn_tab_size))
3711 goto nla_put_failure;
3712 break;
3713 }
3714
3715 genlmsg_end(msg, reply);
3716 ret = genlmsg_reply(msg, info);
3717 goto out;
3718
3719 nla_put_failure:
3720 pr_err("not enough space in Netlink message\n");
3721 ret = -EMSGSIZE;
3722
3723 out_err:
3724 nlmsg_free(msg);
3725 out:
3726 mutex_unlock(&__ip_vs_mutex);
3727
3728 return ret;
3729 }
3730
3731
3732 static const struct genl_ops ip_vs_genl_ops[] = {
3733 {
3734 .cmd = IPVS_CMD_NEW_SERVICE,
3735 .flags = GENL_ADMIN_PERM,
3736 .policy = ip_vs_cmd_policy,
3737 .doit = ip_vs_genl_set_cmd,
3738 },
3739 {
3740 .cmd = IPVS_CMD_SET_SERVICE,
3741 .flags = GENL_ADMIN_PERM,
3742 .policy = ip_vs_cmd_policy,
3743 .doit = ip_vs_genl_set_cmd,
3744 },
3745 {
3746 .cmd = IPVS_CMD_DEL_SERVICE,
3747 .flags = GENL_ADMIN_PERM,
3748 .policy = ip_vs_cmd_policy,
3749 .doit = ip_vs_genl_set_cmd,
3750 },
3751 {
3752 .cmd = IPVS_CMD_GET_SERVICE,
3753 .flags = GENL_ADMIN_PERM,
3754 .doit = ip_vs_genl_get_cmd,
3755 .dumpit = ip_vs_genl_dump_services,
3756 .policy = ip_vs_cmd_policy,
3757 },
3758 {
3759 .cmd = IPVS_CMD_NEW_DEST,
3760 .flags = GENL_ADMIN_PERM,
3761 .policy = ip_vs_cmd_policy,
3762 .doit = ip_vs_genl_set_cmd,
3763 },
3764 {
3765 .cmd = IPVS_CMD_SET_DEST,
3766 .flags = GENL_ADMIN_PERM,
3767 .policy = ip_vs_cmd_policy,
3768 .doit = ip_vs_genl_set_cmd,
3769 },
3770 {
3771 .cmd = IPVS_CMD_DEL_DEST,
3772 .flags = GENL_ADMIN_PERM,
3773 .policy = ip_vs_cmd_policy,
3774 .doit = ip_vs_genl_set_cmd,
3775 },
3776 {
3777 .cmd = IPVS_CMD_GET_DEST,
3778 .flags = GENL_ADMIN_PERM,
3779 .policy = ip_vs_cmd_policy,
3780 .dumpit = ip_vs_genl_dump_dests,
3781 },
3782 {
3783 .cmd = IPVS_CMD_NEW_DAEMON,
3784 .flags = GENL_ADMIN_PERM,
3785 .policy = ip_vs_cmd_policy,
3786 .doit = ip_vs_genl_set_daemon,
3787 },
3788 {
3789 .cmd = IPVS_CMD_DEL_DAEMON,
3790 .flags = GENL_ADMIN_PERM,
3791 .policy = ip_vs_cmd_policy,
3792 .doit = ip_vs_genl_set_daemon,
3793 },
3794 {
3795 .cmd = IPVS_CMD_GET_DAEMON,
3796 .flags = GENL_ADMIN_PERM,
3797 .dumpit = ip_vs_genl_dump_daemons,
3798 },
3799 {
3800 .cmd = IPVS_CMD_SET_CONFIG,
3801 .flags = GENL_ADMIN_PERM,
3802 .policy = ip_vs_cmd_policy,
3803 .doit = ip_vs_genl_set_cmd,
3804 },
3805 {
3806 .cmd = IPVS_CMD_GET_CONFIG,
3807 .flags = GENL_ADMIN_PERM,
3808 .doit = ip_vs_genl_get_cmd,
3809 },
3810 {
3811 .cmd = IPVS_CMD_GET_INFO,
3812 .flags = GENL_ADMIN_PERM,
3813 .doit = ip_vs_genl_get_cmd,
3814 },
3815 {
3816 .cmd = IPVS_CMD_ZERO,
3817 .flags = GENL_ADMIN_PERM,
3818 .policy = ip_vs_cmd_policy,
3819 .doit = ip_vs_genl_set_cmd,
3820 },
3821 {
3822 .cmd = IPVS_CMD_FLUSH,
3823 .flags = GENL_ADMIN_PERM,
3824 .doit = ip_vs_genl_set_cmd,
3825 },
3826 };
3827
3828 static int __init ip_vs_genl_register(void)
3829 {
3830 return genl_register_family_with_ops(&ip_vs_genl_family,
3831 ip_vs_genl_ops);
3832 }
3833
3834 static void ip_vs_genl_unregister(void)
3835 {
3836 genl_unregister_family(&ip_vs_genl_family);
3837 }
3838
3839 /* End of Generic Netlink interface definitions */
3840
3841 /*
3842 * per netns intit/exit func.
3843 */
3844 #ifdef CONFIG_SYSCTL
3845 static int __net_init ip_vs_control_net_init_sysctl(struct net *net)
3846 {
3847 int idx;
3848 struct netns_ipvs *ipvs = net_ipvs(net);
3849 struct ctl_table *tbl;
3850
3851 atomic_set(&ipvs->dropentry, 0);
3852 spin_lock_init(&ipvs->dropentry_lock);
3853 spin_lock_init(&ipvs->droppacket_lock);
3854 spin_lock_init(&ipvs->securetcp_lock);
3855
3856 if (!net_eq(net, &init_net)) {
3857 tbl = kmemdup(vs_vars, sizeof(vs_vars), GFP_KERNEL);
3858 if (tbl == NULL)
3859 return -ENOMEM;
3860
3861 /* Don't export sysctls to unprivileged users */
3862 if (net->user_ns != &init_user_ns)
3863 tbl[0].procname = NULL;
3864 } else
3865 tbl = vs_vars;
3866 /* Initialize sysctl defaults */
3867 for (idx = 0; idx < ARRAY_SIZE(vs_vars); idx++) {
3868 if (tbl[idx].proc_handler == proc_do_defense_mode)
3869 tbl[idx].extra2 = ipvs;
3870 }
3871 idx = 0;
3872 ipvs->sysctl_amemthresh = 1024;
3873 tbl[idx++].data = &ipvs->sysctl_amemthresh;
3874 ipvs->sysctl_am_droprate = 10;
3875 tbl[idx++].data = &ipvs->sysctl_am_droprate;
3876 tbl[idx++].data = &ipvs->sysctl_drop_entry;
3877 tbl[idx++].data = &ipvs->sysctl_drop_packet;
3878 #ifdef CONFIG_IP_VS_NFCT
3879 tbl[idx++].data = &ipvs->sysctl_conntrack;
3880 #endif
3881 tbl[idx++].data = &ipvs->sysctl_secure_tcp;
3882 ipvs->sysctl_snat_reroute = 1;
3883 tbl[idx++].data = &ipvs->sysctl_snat_reroute;
3884 ipvs->sysctl_sync_ver = 1;
3885 tbl[idx++].data = &ipvs->sysctl_sync_ver;
3886 ipvs->sysctl_sync_ports = 1;
3887 tbl[idx++].data = &ipvs->sysctl_sync_ports;
3888 tbl[idx++].data = &ipvs->sysctl_sync_persist_mode;
3889 ipvs->sysctl_sync_qlen_max = nr_free_buffer_pages() / 32;
3890 tbl[idx++].data = &ipvs->sysctl_sync_qlen_max;
3891 ipvs->sysctl_sync_sock_size = 0;
3892 tbl[idx++].data = &ipvs->sysctl_sync_sock_size;
3893 tbl[idx++].data = &ipvs->sysctl_cache_bypass;
3894 tbl[idx++].data = &ipvs->sysctl_expire_nodest_conn;
3895 tbl[idx++].data = &ipvs->sysctl_sloppy_tcp;
3896 tbl[idx++].data = &ipvs->sysctl_sloppy_sctp;
3897 tbl[idx++].data = &ipvs->sysctl_expire_quiescent_template;
3898 ipvs->sysctl_sync_threshold[0] = DEFAULT_SYNC_THRESHOLD;
3899 ipvs->sysctl_sync_threshold[1] = DEFAULT_SYNC_PERIOD;
3900 tbl[idx].data = &ipvs->sysctl_sync_threshold;
3901 tbl[idx++].maxlen = sizeof(ipvs->sysctl_sync_threshold);
3902 ipvs->sysctl_sync_refresh_period = DEFAULT_SYNC_REFRESH_PERIOD;
3903 tbl[idx++].data = &ipvs->sysctl_sync_refresh_period;
3904 ipvs->sysctl_sync_retries = clamp_t(int, DEFAULT_SYNC_RETRIES, 0, 3);
3905 tbl[idx++].data = &ipvs->sysctl_sync_retries;
3906 tbl[idx++].data = &ipvs->sysctl_nat_icmp_send;
3907 ipvs->sysctl_pmtu_disc = 1;
3908 tbl[idx++].data = &ipvs->sysctl_pmtu_disc;
3909 tbl[idx++].data = &ipvs->sysctl_backup_only;
3910 ipvs->sysctl_conn_reuse_mode = 1;
3911 tbl[idx++].data = &ipvs->sysctl_conn_reuse_mode;
3912 tbl[idx++].data = &ipvs->sysctl_schedule_icmp;
3913 tbl[idx++].data = &ipvs->sysctl_ignore_tunneled;
3914
3915 ipvs->sysctl_hdr = register_net_sysctl(net, "net/ipv4/vs", tbl);
3916 if (ipvs->sysctl_hdr == NULL) {
3917 if (!net_eq(net, &init_net))
3918 kfree(tbl);
3919 return -ENOMEM;
3920 }
3921 ip_vs_start_estimator(net, &ipvs->tot_stats);
3922 ipvs->sysctl_tbl = tbl;
3923 /* Schedule defense work */
3924 INIT_DELAYED_WORK(&ipvs->defense_work, defense_work_handler);
3925 schedule_delayed_work(&ipvs->defense_work, DEFENSE_TIMER_PERIOD);
3926
3927 return 0;
3928 }
3929
3930 static void __net_exit ip_vs_control_net_cleanup_sysctl(struct net *net)
3931 {
3932 struct netns_ipvs *ipvs = net_ipvs(net);
3933
3934 cancel_delayed_work_sync(&ipvs->defense_work);
3935 cancel_work_sync(&ipvs->defense_work.work);
3936 unregister_net_sysctl_table(ipvs->sysctl_hdr);
3937 ip_vs_stop_estimator(net, &ipvs->tot_stats);
3938
3939 if (!net_eq(net, &init_net))
3940 kfree(ipvs->sysctl_tbl);
3941 }
3942
3943 #else
3944
3945 static int __net_init ip_vs_control_net_init_sysctl(struct net *net) { return 0; }
3946 static void __net_exit ip_vs_control_net_cleanup_sysctl(struct net *net) { }
3947
3948 #endif
3949
3950 static struct notifier_block ip_vs_dst_notifier = {
3951 .notifier_call = ip_vs_dst_event,
3952 };
3953
3954 int __net_init ip_vs_control_net_init(struct net *net)
3955 {
3956 int i, idx;
3957 struct netns_ipvs *ipvs = net_ipvs(net);
3958
3959 /* Initialize rs_table */
3960 for (idx = 0; idx < IP_VS_RTAB_SIZE; idx++)
3961 INIT_HLIST_HEAD(&ipvs->rs_table[idx]);
3962
3963 INIT_LIST_HEAD(&ipvs->dest_trash);
3964 spin_lock_init(&ipvs->dest_trash_lock);
3965 setup_timer(&ipvs->dest_trash_timer, ip_vs_dest_trash_expire,
3966 (unsigned long) ipvs);
3967 atomic_set(&ipvs->ftpsvc_counter, 0);
3968 atomic_set(&ipvs->nullsvc_counter, 0);
3969
3970 /* procfs stats */
3971 ipvs->tot_stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
3972 if (!ipvs->tot_stats.cpustats)
3973 return -ENOMEM;
3974
3975 for_each_possible_cpu(i) {
3976 struct ip_vs_cpu_stats *ipvs_tot_stats;
3977 ipvs_tot_stats = per_cpu_ptr(ipvs->tot_stats.cpustats, i);
3978 u64_stats_init(&ipvs_tot_stats->syncp);
3979 }
3980
3981 spin_lock_init(&ipvs->tot_stats.lock);
3982
3983 proc_create("ip_vs", 0, net->proc_net, &ip_vs_info_fops);
3984 proc_create("ip_vs_stats", 0, net->proc_net, &ip_vs_stats_fops);
3985 proc_create("ip_vs_stats_percpu", 0, net->proc_net,
3986 &ip_vs_stats_percpu_fops);
3987
3988 if (ip_vs_control_net_init_sysctl(net))
3989 goto err;
3990
3991 return 0;
3992
3993 err:
3994 free_percpu(ipvs->tot_stats.cpustats);
3995 return -ENOMEM;
3996 }
3997
3998 void __net_exit ip_vs_control_net_cleanup(struct net *net)
3999 {
4000 struct netns_ipvs *ipvs = net_ipvs(net);
4001
4002 ip_vs_trash_cleanup(ipvs);
4003 ip_vs_control_net_cleanup_sysctl(net);
4004 remove_proc_entry("ip_vs_stats_percpu", net->proc_net);
4005 remove_proc_entry("ip_vs_stats", net->proc_net);
4006 remove_proc_entry("ip_vs", net->proc_net);
4007 free_percpu(ipvs->tot_stats.cpustats);
4008 }
4009
4010 int __init ip_vs_register_nl_ioctl(void)
4011 {
4012 int ret;
4013
4014 ret = nf_register_sockopt(&ip_vs_sockopts);
4015 if (ret) {
4016 pr_err("cannot register sockopt.\n");
4017 goto err_sock;
4018 }
4019
4020 ret = ip_vs_genl_register();
4021 if (ret) {
4022 pr_err("cannot register Generic Netlink interface.\n");
4023 goto err_genl;
4024 }
4025 return 0;
4026
4027 err_genl:
4028 nf_unregister_sockopt(&ip_vs_sockopts);
4029 err_sock:
4030 return ret;
4031 }
4032
4033 void ip_vs_unregister_nl_ioctl(void)
4034 {
4035 ip_vs_genl_unregister();
4036 nf_unregister_sockopt(&ip_vs_sockopts);
4037 }
4038
4039 int __init ip_vs_control_init(void)
4040 {
4041 int idx;
4042 int ret;
4043
4044 EnterFunction(2);
4045
4046 /* Initialize svc_table, ip_vs_svc_fwm_table */
4047 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
4048 INIT_HLIST_HEAD(&ip_vs_svc_table[idx]);
4049 INIT_HLIST_HEAD(&ip_vs_svc_fwm_table[idx]);
4050 }
4051
4052 smp_wmb(); /* Do we really need it now ? */
4053
4054 ret = register_netdevice_notifier(&ip_vs_dst_notifier);
4055 if (ret < 0)
4056 return ret;
4057
4058 LeaveFunction(2);
4059 return 0;
4060 }
4061
4062
4063 void ip_vs_control_cleanup(void)
4064 {
4065 EnterFunction(2);
4066 unregister_netdevice_notifier(&ip_vs_dst_notifier);
4067 LeaveFunction(2);
4068 }
Linux kernel - Deliverables
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