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mlxsw: spectrum: Add support for access cable info via ethtool
[linux-2.6/btrfs-unstable.git] / net / netfilter / ipvs / ip_vs_ctl.c
blob1fa3c2307b6ea0173bbcf13c3d0b5cca8c68cba9
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 <linux/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);
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 && protocol == IPPROTO_TCP &&
430 atomic_read(&ipvs->ftpsvc_counter) &&
431 (vport == FTPDATA || ntohs(vport) >= inet_prot_sock(ipvs->net))) {
432 /*
433 * Check if ftp service entry exists, the packet
434 * might belong to FTP data connections.
435 */
436 svc = __ip_vs_service_find(ipvs, af, protocol, vaddr, FTPPORT);
437 }
438
439 if (svc == NULL
440 && atomic_read(&ipvs->nullsvc_counter)) {
441 /*
442 * Check if the catch-all port (port zero) exists
443 */
444 svc = __ip_vs_service_find(ipvs, af, protocol, vaddr, 0);
445 }
446
447 out:
448 IP_VS_DBG_BUF(9, "lookup service: fwm %u %s %s:%u %s\n",
449 fwmark, ip_vs_proto_name(protocol),
450 IP_VS_DBG_ADDR(af, vaddr), ntohs(vport),
451 svc ? "hit" : "not hit");
452
453 return svc;
454 }
455
456
457 static inline void
458 __ip_vs_bind_svc(struct ip_vs_dest *dest, struct ip_vs_service *svc)
459 {
460 atomic_inc(&svc->refcnt);
461 rcu_assign_pointer(dest->svc, svc);
462 }
463
464 static void ip_vs_service_free(struct ip_vs_service *svc)
465 {
466 free_percpu(svc->stats.cpustats);
467 kfree(svc);
468 }
469
470 static void ip_vs_service_rcu_free(struct rcu_head *head)
471 {
472 struct ip_vs_service *svc;
473
474 svc = container_of(head, struct ip_vs_service, rcu_head);
475 ip_vs_service_free(svc);
476 }
477
478 static void __ip_vs_svc_put(struct ip_vs_service *svc, bool do_delay)
479 {
480 if (atomic_dec_and_test(&svc->refcnt)) {
481 IP_VS_DBG_BUF(3, "Removing service %u/%s:%u\n",
482 svc->fwmark,
483 IP_VS_DBG_ADDR(svc->af, &svc->addr),
484 ntohs(svc->port));
485 if (do_delay)
486 call_rcu(&svc->rcu_head, ip_vs_service_rcu_free);
487 else
488 ip_vs_service_free(svc);
489 }
490 }
491
492
493 /*
494 * Returns hash value for real service
495 */
496 static inline unsigned int ip_vs_rs_hashkey(int af,
497 const union nf_inet_addr *addr,
498 __be16 port)
499 {
500 register unsigned int porth = ntohs(port);
501 __be32 addr_fold = addr->ip;
502
503 #ifdef CONFIG_IP_VS_IPV6
504 if (af == AF_INET6)
505 addr_fold = addr->ip6[0]^addr->ip6[1]^
506 addr->ip6[2]^addr->ip6[3];
507 #endif
508
509 return (ntohl(addr_fold)^(porth>>IP_VS_RTAB_BITS)^porth)
510 & IP_VS_RTAB_MASK;
511 }
512
513 /* Hash ip_vs_dest in rs_table by <proto,addr,port>. */
514 static void ip_vs_rs_hash(struct netns_ipvs *ipvs, struct ip_vs_dest *dest)
515 {
516 unsigned int hash;
517
518 if (dest->in_rs_table)
519 return;
520
521 /*
522 * Hash by proto,addr,port,
523 * which are the parameters of the real service.
524 */
525 hash = ip_vs_rs_hashkey(dest->af, &dest->addr, dest->port);
526
527 hlist_add_head_rcu(&dest->d_list, &ipvs->rs_table[hash]);
528 dest->in_rs_table = 1;
529 }
530
531 /* Unhash ip_vs_dest from rs_table. */
532 static void ip_vs_rs_unhash(struct ip_vs_dest *dest)
533 {
534 /*
535 * Remove it from the rs_table table.
536 */
537 if (dest->in_rs_table) {
538 hlist_del_rcu(&dest->d_list);
539 dest->in_rs_table = 0;
540 }
541 }
542
543 /* Check if real service by <proto,addr,port> is present */
544 bool ip_vs_has_real_service(struct netns_ipvs *ipvs, int af, __u16 protocol,
545 const union nf_inet_addr *daddr, __be16 dport)
546 {
547 unsigned int hash;
548 struct ip_vs_dest *dest;
549
550 /* Check for "full" addressed entries */
551 hash = ip_vs_rs_hashkey(af, daddr, dport);
552
553 rcu_read_lock();
554 hlist_for_each_entry_rcu(dest, &ipvs->rs_table[hash], d_list) {
555 if (dest->port == dport &&
556 dest->af == af &&
557 ip_vs_addr_equal(af, &dest->addr, daddr) &&
558 (dest->protocol == protocol || dest->vfwmark)) {
559 /* HIT */
560 rcu_read_unlock();
561 return true;
562 }
563 }
564 rcu_read_unlock();
565
566 return false;
567 }
568
569 /* Find real service record by <proto,addr,port>.
570 * In case of multiple records with the same <proto,addr,port>, only
571 * the first found record is returned.
572 *
573 * To be called under RCU lock.
574 */
575 struct ip_vs_dest *ip_vs_find_real_service(struct netns_ipvs *ipvs, int af,
576 __u16 protocol,
577 const union nf_inet_addr *daddr,
578 __be16 dport)
579 {
580 unsigned int hash;
581 struct ip_vs_dest *dest;
582
583 /* Check for "full" addressed entries */
584 hash = ip_vs_rs_hashkey(af, daddr, dport);
585
586 hlist_for_each_entry_rcu(dest, &ipvs->rs_table[hash], d_list) {
587 if (dest->port == dport &&
588 dest->af == af &&
589 ip_vs_addr_equal(af, &dest->addr, daddr) &&
590 (dest->protocol == protocol || dest->vfwmark)) {
591 /* HIT */
592 return dest;
593 }
594 }
595
596 return NULL;
597 }
598
599 /* Lookup destination by {addr,port} in the given service
600 * Called under RCU lock.
601 */
602 static struct ip_vs_dest *
603 ip_vs_lookup_dest(struct ip_vs_service *svc, int dest_af,
604 const union nf_inet_addr *daddr, __be16 dport)
605 {
606 struct ip_vs_dest *dest;
607
608 /*
609 * Find the destination for the given service
610 */
611 list_for_each_entry_rcu(dest, &svc->destinations, n_list) {
612 if ((dest->af == dest_af) &&
613 ip_vs_addr_equal(dest_af, &dest->addr, daddr) &&
614 (dest->port == dport)) {
615 /* HIT */
616 return dest;
617 }
618 }
619
620 return NULL;
621 }
622
623 /*
624 * Find destination by {daddr,dport,vaddr,protocol}
625 * Created to be used in ip_vs_process_message() in
626 * the backup synchronization daemon. It finds the
627 * destination to be bound to the received connection
628 * on the backup.
629 * Called under RCU lock, no refcnt is returned.
630 */
631 struct ip_vs_dest *ip_vs_find_dest(struct netns_ipvs *ipvs, int svc_af, int dest_af,
632 const union nf_inet_addr *daddr,
633 __be16 dport,
634 const union nf_inet_addr *vaddr,
635 __be16 vport, __u16 protocol, __u32 fwmark,
636 __u32 flags)
637 {
638 struct ip_vs_dest *dest;
639 struct ip_vs_service *svc;
640 __be16 port = dport;
641
642 svc = ip_vs_service_find(ipvs, svc_af, fwmark, protocol, vaddr, vport);
643 if (!svc)
644 return NULL;
645 if (fwmark && (flags & IP_VS_CONN_F_FWD_MASK) != IP_VS_CONN_F_MASQ)
646 port = 0;
647 dest = ip_vs_lookup_dest(svc, dest_af, daddr, port);
648 if (!dest)
649 dest = ip_vs_lookup_dest(svc, dest_af, daddr, port ^ dport);
650 return dest;
651 }
652
653 void ip_vs_dest_dst_rcu_free(struct rcu_head *head)
654 {
655 struct ip_vs_dest_dst *dest_dst = container_of(head,
656 struct ip_vs_dest_dst,
657 rcu_head);
658
659 dst_release(dest_dst->dst_cache);
660 kfree(dest_dst);
661 }
662
663 /* Release dest_dst and dst_cache for dest in user context */
664 static void __ip_vs_dst_cache_reset(struct ip_vs_dest *dest)
665 {
666 struct ip_vs_dest_dst *old;
667
668 old = rcu_dereference_protected(dest->dest_dst, 1);
669 if (old) {
670 RCU_INIT_POINTER(dest->dest_dst, NULL);
671 call_rcu(&old->rcu_head, ip_vs_dest_dst_rcu_free);
672 }
673 }
674
675 /*
676 * Lookup dest by {svc,addr,port} in the destination trash.
677 * The destination trash is used to hold the destinations that are removed
678 * from the service table but are still referenced by some conn entries.
679 * The reason to add the destination trash is when the dest is temporary
680 * down (either by administrator or by monitor program), the dest can be
681 * picked back from the trash, the remaining connections to the dest can
682 * continue, and the counting information of the dest is also useful for
683 * scheduling.
684 */
685 static struct ip_vs_dest *
686 ip_vs_trash_get_dest(struct ip_vs_service *svc, int dest_af,
687 const union nf_inet_addr *daddr, __be16 dport)
688 {
689 struct ip_vs_dest *dest;
690 struct netns_ipvs *ipvs = svc->ipvs;
691
692 /*
693 * Find the destination in trash
694 */
695 spin_lock_bh(&ipvs->dest_trash_lock);
696 list_for_each_entry(dest, &ipvs->dest_trash, t_list) {
697 IP_VS_DBG_BUF(3, "Destination %u/%s:%u still in trash, "
698 "dest->refcnt=%d\n",
699 dest->vfwmark,
700 IP_VS_DBG_ADDR(dest->af, &dest->addr),
701 ntohs(dest->port),
702 refcount_read(&dest->refcnt));
703 if (dest->af == dest_af &&
704 ip_vs_addr_equal(dest_af, &dest->addr, daddr) &&
705 dest->port == dport &&
706 dest->vfwmark == svc->fwmark &&
707 dest->protocol == svc->protocol &&
708 (svc->fwmark ||
709 (ip_vs_addr_equal(svc->af, &dest->vaddr, &svc->addr) &&
710 dest->vport == svc->port))) {
711 /* HIT */
712 list_del(&dest->t_list);
713 goto out;
714 }
715 }
716
717 dest = NULL;
718
719 out:
720 spin_unlock_bh(&ipvs->dest_trash_lock);
721
722 return dest;
723 }
724
725 static void ip_vs_dest_free(struct ip_vs_dest *dest)
726 {
727 struct ip_vs_service *svc = rcu_dereference_protected(dest->svc, 1);
728
729 __ip_vs_dst_cache_reset(dest);
730 __ip_vs_svc_put(svc, false);
731 free_percpu(dest->stats.cpustats);
732 ip_vs_dest_put_and_free(dest);
733 }
734
735 /*
736 * Clean up all the destinations in the trash
737 * Called by the ip_vs_control_cleanup()
738 *
739 * When the ip_vs_control_clearup is activated by ipvs module exit,
740 * the service tables must have been flushed and all the connections
741 * are expired, and the refcnt of each destination in the trash must
742 * be 1, so we simply release them here.
743 */
744 static void ip_vs_trash_cleanup(struct netns_ipvs *ipvs)
745 {
746 struct ip_vs_dest *dest, *nxt;
747
748 del_timer_sync(&ipvs->dest_trash_timer);
749 /* No need to use dest_trash_lock */
750 list_for_each_entry_safe(dest, nxt, &ipvs->dest_trash, t_list) {
751 list_del(&dest->t_list);
752 ip_vs_dest_free(dest);
753 }
754 }
755
756 static void
757 ip_vs_copy_stats(struct ip_vs_kstats *dst, struct ip_vs_stats *src)
758 {
759 #define IP_VS_SHOW_STATS_COUNTER(c) dst->c = src->kstats.c - src->kstats0.c
760
761 spin_lock_bh(&src->lock);
762
763 IP_VS_SHOW_STATS_COUNTER(conns);
764 IP_VS_SHOW_STATS_COUNTER(inpkts);
765 IP_VS_SHOW_STATS_COUNTER(outpkts);
766 IP_VS_SHOW_STATS_COUNTER(inbytes);
767 IP_VS_SHOW_STATS_COUNTER(outbytes);
768
769 ip_vs_read_estimator(dst, src);
770
771 spin_unlock_bh(&src->lock);
772 }
773
774 static void
775 ip_vs_export_stats_user(struct ip_vs_stats_user *dst, struct ip_vs_kstats *src)
776 {
777 dst->conns = (u32)src->conns;
778 dst->inpkts = (u32)src->inpkts;
779 dst->outpkts = (u32)src->outpkts;
780 dst->inbytes = src->inbytes;
781 dst->outbytes = src->outbytes;
782 dst->cps = (u32)src->cps;
783 dst->inpps = (u32)src->inpps;
784 dst->outpps = (u32)src->outpps;
785 dst->inbps = (u32)src->inbps;
786 dst->outbps = (u32)src->outbps;
787 }
788
789 static void
790 ip_vs_zero_stats(struct ip_vs_stats *stats)
791 {
792 spin_lock_bh(&stats->lock);
793
794 /* get current counters as zero point, rates are zeroed */
795
796 #define IP_VS_ZERO_STATS_COUNTER(c) stats->kstats0.c = stats->kstats.c
797
798 IP_VS_ZERO_STATS_COUNTER(conns);
799 IP_VS_ZERO_STATS_COUNTER(inpkts);
800 IP_VS_ZERO_STATS_COUNTER(outpkts);
801 IP_VS_ZERO_STATS_COUNTER(inbytes);
802 IP_VS_ZERO_STATS_COUNTER(outbytes);
803
804 ip_vs_zero_estimator(stats);
805
806 spin_unlock_bh(&stats->lock);
807 }
808
809 /*
810 * Update a destination in the given service
811 */
812 static void
813 __ip_vs_update_dest(struct ip_vs_service *svc, struct ip_vs_dest *dest,
814 struct ip_vs_dest_user_kern *udest, int add)
815 {
816 struct netns_ipvs *ipvs = svc->ipvs;
817 struct ip_vs_service *old_svc;
818 struct ip_vs_scheduler *sched;
819 int conn_flags;
820
821 /* We cannot modify an address and change the address family */
822 BUG_ON(!add && udest->af != dest->af);
823
824 if (add && udest->af != svc->af)
825 ipvs->mixed_address_family_dests++;
826
827 /* set the weight and the flags */
828 atomic_set(&dest->weight, udest->weight);
829 conn_flags = udest->conn_flags & IP_VS_CONN_F_DEST_MASK;
830 conn_flags |= IP_VS_CONN_F_INACTIVE;
831
832 /* set the IP_VS_CONN_F_NOOUTPUT flag if not masquerading/NAT */
833 if ((conn_flags & IP_VS_CONN_F_FWD_MASK) != IP_VS_CONN_F_MASQ) {
834 conn_flags |= IP_VS_CONN_F_NOOUTPUT;
835 } else {
836 /*
837 * Put the real service in rs_table if not present.
838 * For now only for NAT!
839 */
840 ip_vs_rs_hash(ipvs, dest);
841 }
842 atomic_set(&dest->conn_flags, conn_flags);
843
844 /* bind the service */
845 old_svc = rcu_dereference_protected(dest->svc, 1);
846 if (!old_svc) {
847 __ip_vs_bind_svc(dest, svc);
848 } else {
849 if (old_svc != svc) {
850 ip_vs_zero_stats(&dest->stats);
851 __ip_vs_bind_svc(dest, svc);
852 __ip_vs_svc_put(old_svc, true);
853 }
854 }
855
856 /* set the dest status flags */
857 dest->flags |= IP_VS_DEST_F_AVAILABLE;
858
859 if (udest->u_threshold == 0 || udest->u_threshold > dest->u_threshold)
860 dest->flags &= ~IP_VS_DEST_F_OVERLOAD;
861 dest->u_threshold = udest->u_threshold;
862 dest->l_threshold = udest->l_threshold;
863
864 dest->af = udest->af;
865
866 spin_lock_bh(&dest->dst_lock);
867 __ip_vs_dst_cache_reset(dest);
868 spin_unlock_bh(&dest->dst_lock);
869
870 if (add) {
871 ip_vs_start_estimator(svc->ipvs, &dest->stats);
872 list_add_rcu(&dest->n_list, &svc->destinations);
873 svc->num_dests++;
874 sched = rcu_dereference_protected(svc->scheduler, 1);
875 if (sched && sched->add_dest)
876 sched->add_dest(svc, dest);
877 } else {
878 sched = rcu_dereference_protected(svc->scheduler, 1);
879 if (sched && sched->upd_dest)
880 sched->upd_dest(svc, dest);
881 }
882 }
883
884
885 /*
886 * Create a destination for the given service
887 */
888 static int
889 ip_vs_new_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest,
890 struct ip_vs_dest **dest_p)
891 {
892 struct ip_vs_dest *dest;
893 unsigned int atype, i;
894
895 EnterFunction(2);
896
897 #ifdef CONFIG_IP_VS_IPV6
898 if (udest->af == AF_INET6) {
899 atype = ipv6_addr_type(&udest->addr.in6);
900 if ((!(atype & IPV6_ADDR_UNICAST) ||
901 atype & IPV6_ADDR_LINKLOCAL) &&
902 !__ip_vs_addr_is_local_v6(svc->ipvs->net, &udest->addr.in6))
903 return -EINVAL;
904 } else
905 #endif
906 {
907 atype = inet_addr_type(svc->ipvs->net, udest->addr.ip);
908 if (atype != RTN_LOCAL && atype != RTN_UNICAST)
909 return -EINVAL;
910 }
911
912 dest = kzalloc(sizeof(struct ip_vs_dest), GFP_KERNEL);
913 if (dest == NULL)
914 return -ENOMEM;
915
916 dest->stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
917 if (!dest->stats.cpustats)
918 goto err_alloc;
919
920 for_each_possible_cpu(i) {
921 struct ip_vs_cpu_stats *ip_vs_dest_stats;
922 ip_vs_dest_stats = per_cpu_ptr(dest->stats.cpustats, i);
923 u64_stats_init(&ip_vs_dest_stats->syncp);
924 }
925
926 dest->af = udest->af;
927 dest->protocol = svc->protocol;
928 dest->vaddr = svc->addr;
929 dest->vport = svc->port;
930 dest->vfwmark = svc->fwmark;
931 ip_vs_addr_copy(udest->af, &dest->addr, &udest->addr);
932 dest->port = udest->port;
933
934 atomic_set(&dest->activeconns, 0);
935 atomic_set(&dest->inactconns, 0);
936 atomic_set(&dest->persistconns, 0);
937 refcount_set(&dest->refcnt, 1);
938
939 INIT_HLIST_NODE(&dest->d_list);
940 spin_lock_init(&dest->dst_lock);
941 spin_lock_init(&dest->stats.lock);
942 __ip_vs_update_dest(svc, dest, udest, 1);
943
944 *dest_p = dest;
945
946 LeaveFunction(2);
947 return 0;
948
949 err_alloc:
950 kfree(dest);
951 return -ENOMEM;
952 }
953
954
955 /*
956 * Add a destination into an existing service
957 */
958 static int
959 ip_vs_add_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
960 {
961 struct ip_vs_dest *dest;
962 union nf_inet_addr daddr;
963 __be16 dport = udest->port;
964 int ret;
965
966 EnterFunction(2);
967
968 if (udest->weight < 0) {
969 pr_err("%s(): server weight less than zero\n", __func__);
970 return -ERANGE;
971 }
972
973 if (udest->l_threshold > udest->u_threshold) {
974 pr_err("%s(): lower threshold is higher than upper threshold\n",
975 __func__);
976 return -ERANGE;
977 }
978
979 ip_vs_addr_copy(udest->af, &daddr, &udest->addr);
980
981 /* We use function that requires RCU lock */
982 rcu_read_lock();
983 dest = ip_vs_lookup_dest(svc, udest->af, &daddr, dport);
984 rcu_read_unlock();
985
986 if (dest != NULL) {
987 IP_VS_DBG(1, "%s(): dest already exists\n", __func__);
988 return -EEXIST;
989 }
990
991 /*
992 * Check if the dest already exists in the trash and
993 * is from the same service
994 */
995 dest = ip_vs_trash_get_dest(svc, udest->af, &daddr, dport);
996
997 if (dest != NULL) {
998 IP_VS_DBG_BUF(3, "Get destination %s:%u from trash, "
999 "dest->refcnt=%d, service %u/%s:%u\n",
1000 IP_VS_DBG_ADDR(udest->af, &daddr), ntohs(dport),
1001 refcount_read(&dest->refcnt),
1002 dest->vfwmark,
1003 IP_VS_DBG_ADDR(svc->af, &dest->vaddr),
1004 ntohs(dest->vport));
1005
1006 __ip_vs_update_dest(svc, dest, udest, 1);
1007 ret = 0;
1008 } else {
1009 /*
1010 * Allocate and initialize the dest structure
1011 */
1012 ret = ip_vs_new_dest(svc, udest, &dest);
1013 }
1014 LeaveFunction(2);
1015
1016 return ret;
1017 }
1018
1019
1020 /*
1021 * Edit a destination in the given service
1022 */
1023 static int
1024 ip_vs_edit_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
1025 {
1026 struct ip_vs_dest *dest;
1027 union nf_inet_addr daddr;
1028 __be16 dport = udest->port;
1029
1030 EnterFunction(2);
1031
1032 if (udest->weight < 0) {
1033 pr_err("%s(): server weight less than zero\n", __func__);
1034 return -ERANGE;
1035 }
1036
1037 if (udest->l_threshold > udest->u_threshold) {
1038 pr_err("%s(): lower threshold is higher than upper threshold\n",
1039 __func__);
1040 return -ERANGE;
1041 }
1042
1043 ip_vs_addr_copy(udest->af, &daddr, &udest->addr);
1044
1045 /* We use function that requires RCU lock */
1046 rcu_read_lock();
1047 dest = ip_vs_lookup_dest(svc, udest->af, &daddr, dport);
1048 rcu_read_unlock();
1049
1050 if (dest == NULL) {
1051 IP_VS_DBG(1, "%s(): dest doesn't exist\n", __func__);
1052 return -ENOENT;
1053 }
1054
1055 __ip_vs_update_dest(svc, dest, udest, 0);
1056 LeaveFunction(2);
1057
1058 return 0;
1059 }
1060
1061 /*
1062 * Delete a destination (must be already unlinked from the service)
1063 */
1064 static void __ip_vs_del_dest(struct netns_ipvs *ipvs, struct ip_vs_dest *dest,
1065 bool cleanup)
1066 {
1067 ip_vs_stop_estimator(ipvs, &dest->stats);
1068
1069 /*
1070 * Remove it from the d-linked list with the real services.
1071 */
1072 ip_vs_rs_unhash(dest);
1073
1074 spin_lock_bh(&ipvs->dest_trash_lock);
1075 IP_VS_DBG_BUF(3, "Moving dest %s:%u into trash, dest->refcnt=%d\n",
1076 IP_VS_DBG_ADDR(dest->af, &dest->addr), ntohs(dest->port),
1077 refcount_read(&dest->refcnt));
1078 if (list_empty(&ipvs->dest_trash) && !cleanup)
1079 mod_timer(&ipvs->dest_trash_timer,
1080 jiffies + (IP_VS_DEST_TRASH_PERIOD >> 1));
1081 /* dest lives in trash with reference */
1082 list_add(&dest->t_list, &ipvs->dest_trash);
1083 dest->idle_start = 0;
1084 spin_unlock_bh(&ipvs->dest_trash_lock);
1085 }
1086
1087
1088 /*
1089 * Unlink a destination from the given service
1090 */
1091 static void __ip_vs_unlink_dest(struct ip_vs_service *svc,
1092 struct ip_vs_dest *dest,
1093 int svcupd)
1094 {
1095 dest->flags &= ~IP_VS_DEST_F_AVAILABLE;
1096
1097 /*
1098 * Remove it from the d-linked destination list.
1099 */
1100 list_del_rcu(&dest->n_list);
1101 svc->num_dests--;
1102
1103 if (dest->af != svc->af)
1104 svc->ipvs->mixed_address_family_dests--;
1105
1106 if (svcupd) {
1107 struct ip_vs_scheduler *sched;
1108
1109 sched = rcu_dereference_protected(svc->scheduler, 1);
1110 if (sched && sched->del_dest)
1111 sched->del_dest(svc, dest);
1112 }
1113 }
1114
1115
1116 /*
1117 * Delete a destination server in the given service
1118 */
1119 static int
1120 ip_vs_del_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
1121 {
1122 struct ip_vs_dest *dest;
1123 __be16 dport = udest->port;
1124
1125 EnterFunction(2);
1126
1127 /* We use function that requires RCU lock */
1128 rcu_read_lock();
1129 dest = ip_vs_lookup_dest(svc, udest->af, &udest->addr, dport);
1130 rcu_read_unlock();
1131
1132 if (dest == NULL) {
1133 IP_VS_DBG(1, "%s(): destination not found!\n", __func__);
1134 return -ENOENT;
1135 }
1136
1137 /*
1138 * Unlink dest from the service
1139 */
1140 __ip_vs_unlink_dest(svc, dest, 1);
1141
1142 /*
1143 * Delete the destination
1144 */
1145 __ip_vs_del_dest(svc->ipvs, dest, false);
1146
1147 LeaveFunction(2);
1148
1149 return 0;
1150 }
1151
1152 static void ip_vs_dest_trash_expire(unsigned long data)
1153 {
1154 struct netns_ipvs *ipvs = (struct netns_ipvs *)data;
1155 struct ip_vs_dest *dest, *next;
1156 unsigned long now = jiffies;
1157
1158 spin_lock(&ipvs->dest_trash_lock);
1159 list_for_each_entry_safe(dest, next, &ipvs->dest_trash, t_list) {
1160 if (refcount_read(&dest->refcnt) > 1)
1161 continue;
1162 if (dest->idle_start) {
1163 if (time_before(now, dest->idle_start +
1164 IP_VS_DEST_TRASH_PERIOD))
1165 continue;
1166 } else {
1167 dest->idle_start = max(1UL, now);
1168 continue;
1169 }
1170 IP_VS_DBG_BUF(3, "Removing destination %u/%s:%u from trash\n",
1171 dest->vfwmark,
1172 IP_VS_DBG_ADDR(dest->af, &dest->addr),
1173 ntohs(dest->port));
1174 list_del(&dest->t_list);
1175 ip_vs_dest_free(dest);
1176 }
1177 if (!list_empty(&ipvs->dest_trash))
1178 mod_timer(&ipvs->dest_trash_timer,
1179 jiffies + (IP_VS_DEST_TRASH_PERIOD >> 1));
1180 spin_unlock(&ipvs->dest_trash_lock);
1181 }
1182
1183 /*
1184 * Add a service into the service hash table
1185 */
1186 static int
1187 ip_vs_add_service(struct netns_ipvs *ipvs, struct ip_vs_service_user_kern *u,
1188 struct ip_vs_service **svc_p)
1189 {
1190 int ret = 0, i;
1191 struct ip_vs_scheduler *sched = NULL;
1192 struct ip_vs_pe *pe = NULL;
1193 struct ip_vs_service *svc = NULL;
1194
1195 /* increase the module use count */
1196 ip_vs_use_count_inc();
1197
1198 /* Lookup the scheduler by 'u->sched_name' */
1199 if (strcmp(u->sched_name, "none")) {
1200 sched = ip_vs_scheduler_get(u->sched_name);
1201 if (!sched) {
1202 pr_info("Scheduler module ip_vs_%s not found\n",
1203 u->sched_name);
1204 ret = -ENOENT;
1205 goto out_err;
1206 }
1207 }
1208
1209 if (u->pe_name && *u->pe_name) {
1210 pe = ip_vs_pe_getbyname(u->pe_name);
1211 if (pe == NULL) {
1212 pr_info("persistence engine module ip_vs_pe_%s "
1213 "not found\n", u->pe_name);
1214 ret = -ENOENT;
1215 goto out_err;
1216 }
1217 }
1218
1219 #ifdef CONFIG_IP_VS_IPV6
1220 if (u->af == AF_INET6) {
1221 __u32 plen = (__force __u32) u->netmask;
1222
1223 if (plen < 1 || plen > 128) {
1224 ret = -EINVAL;
1225 goto out_err;
1226 }
1227 }
1228 #endif
1229
1230 svc = kzalloc(sizeof(struct ip_vs_service), GFP_KERNEL);
1231 if (svc == NULL) {
1232 IP_VS_DBG(1, "%s(): no memory\n", __func__);
1233 ret = -ENOMEM;
1234 goto out_err;
1235 }
1236 svc->stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
1237 if (!svc->stats.cpustats) {
1238 ret = -ENOMEM;
1239 goto out_err;
1240 }
1241
1242 for_each_possible_cpu(i) {
1243 struct ip_vs_cpu_stats *ip_vs_stats;
1244 ip_vs_stats = per_cpu_ptr(svc->stats.cpustats, i);
1245 u64_stats_init(&ip_vs_stats->syncp);
1246 }
1247
1248
1249 /* I'm the first user of the service */
1250 atomic_set(&svc->refcnt, 0);
1251
1252 svc->af = u->af;
1253 svc->protocol = u->protocol;
1254 ip_vs_addr_copy(svc->af, &svc->addr, &u->addr);
1255 svc->port = u->port;
1256 svc->fwmark = u->fwmark;
1257 svc->flags = u->flags;
1258 svc->timeout = u->timeout * HZ;
1259 svc->netmask = u->netmask;
1260 svc->ipvs = ipvs;
1261
1262 INIT_LIST_HEAD(&svc->destinations);
1263 spin_lock_init(&svc->sched_lock);
1264 spin_lock_init(&svc->stats.lock);
1265
1266 /* Bind the scheduler */
1267 if (sched) {
1268 ret = ip_vs_bind_scheduler(svc, sched);
1269 if (ret)
1270 goto out_err;
1271 sched = NULL;
1272 }
1273
1274 /* Bind the ct retriever */
1275 RCU_INIT_POINTER(svc->pe, pe);
1276 pe = NULL;
1277
1278 /* Update the virtual service counters */
1279 if (svc->port == FTPPORT)
1280 atomic_inc(&ipvs->ftpsvc_counter);
1281 else if (svc->port == 0)
1282 atomic_inc(&ipvs->nullsvc_counter);
1283 if (svc->pe && svc->pe->conn_out)
1284 atomic_inc(&ipvs->conn_out_counter);
1285
1286 ip_vs_start_estimator(ipvs, &svc->stats);
1287
1288 /* Count only IPv4 services for old get/setsockopt interface */
1289 if (svc->af == AF_INET)
1290 ipvs->num_services++;
1291
1292 /* Hash the service into the service table */
1293 ip_vs_svc_hash(svc);
1294
1295 *svc_p = svc;
1296 /* Now there is a service - full throttle */
1297 ipvs->enable = 1;
1298 return 0;
1299
1300
1301 out_err:
1302 if (svc != NULL) {
1303 ip_vs_unbind_scheduler(svc, sched);
1304 ip_vs_service_free(svc);
1305 }
1306 ip_vs_scheduler_put(sched);
1307 ip_vs_pe_put(pe);
1308
1309 /* decrease the module use count */
1310 ip_vs_use_count_dec();
1311
1312 return ret;
1313 }
1314
1315
1316 /*
1317 * Edit a service and bind it with a new scheduler
1318 */
1319 static int
1320 ip_vs_edit_service(struct ip_vs_service *svc, struct ip_vs_service_user_kern *u)
1321 {
1322 struct ip_vs_scheduler *sched = NULL, *old_sched;
1323 struct ip_vs_pe *pe = NULL, *old_pe = NULL;
1324 int ret = 0;
1325 bool new_pe_conn_out, old_pe_conn_out;
1326
1327 /*
1328 * Lookup the scheduler, by 'u->sched_name'
1329 */
1330 if (strcmp(u->sched_name, "none")) {
1331 sched = ip_vs_scheduler_get(u->sched_name);
1332 if (!sched) {
1333 pr_info("Scheduler module ip_vs_%s not found\n",
1334 u->sched_name);
1335 return -ENOENT;
1336 }
1337 }
1338 old_sched = sched;
1339
1340 if (u->pe_name && *u->pe_name) {
1341 pe = ip_vs_pe_getbyname(u->pe_name);
1342 if (pe == NULL) {
1343 pr_info("persistence engine module ip_vs_pe_%s "
1344 "not found\n", u->pe_name);
1345 ret = -ENOENT;
1346 goto out;
1347 }
1348 old_pe = pe;
1349 }
1350
1351 #ifdef CONFIG_IP_VS_IPV6
1352 if (u->af == AF_INET6) {
1353 __u32 plen = (__force __u32) u->netmask;
1354
1355 if (plen < 1 || plen > 128) {
1356 ret = -EINVAL;
1357 goto out;
1358 }
1359 }
1360 #endif
1361
1362 old_sched = rcu_dereference_protected(svc->scheduler, 1);
1363 if (sched != old_sched) {
1364 if (old_sched) {
1365 ip_vs_unbind_scheduler(svc, old_sched);
1366 RCU_INIT_POINTER(svc->scheduler, NULL);
1367 /* Wait all svc->sched_data users */
1368 synchronize_rcu();
1369 }
1370 /* Bind the new scheduler */
1371 if (sched) {
1372 ret = ip_vs_bind_scheduler(svc, sched);
1373 if (ret) {
1374 ip_vs_scheduler_put(sched);
1375 goto out;
1376 }
1377 }
1378 }
1379
1380 /*
1381 * Set the flags and timeout value
1382 */
1383 svc->flags = u->flags | IP_VS_SVC_F_HASHED;
1384 svc->timeout = u->timeout * HZ;
1385 svc->netmask = u->netmask;
1386
1387 old_pe = rcu_dereference_protected(svc->pe, 1);
1388 if (pe != old_pe) {
1389 rcu_assign_pointer(svc->pe, pe);
1390 /* check for optional methods in new pe */
1391 new_pe_conn_out = (pe && pe->conn_out) ? true : false;
1392 old_pe_conn_out = (old_pe && old_pe->conn_out) ? true : false;
1393 if (new_pe_conn_out && !old_pe_conn_out)
1394 atomic_inc(&svc->ipvs->conn_out_counter);
1395 if (old_pe_conn_out && !new_pe_conn_out)
1396 atomic_dec(&svc->ipvs->conn_out_counter);
1397 }
1398
1399 out:
1400 ip_vs_scheduler_put(old_sched);
1401 ip_vs_pe_put(old_pe);
1402 return ret;
1403 }
1404
1405 /*
1406 * Delete a service from the service list
1407 * - The service must be unlinked, unlocked and not referenced!
1408 * - We are called under _bh lock
1409 */
1410 static void __ip_vs_del_service(struct ip_vs_service *svc, bool cleanup)
1411 {
1412 struct ip_vs_dest *dest, *nxt;
1413 struct ip_vs_scheduler *old_sched;
1414 struct ip_vs_pe *old_pe;
1415 struct netns_ipvs *ipvs = svc->ipvs;
1416
1417 /* Count only IPv4 services for old get/setsockopt interface */
1418 if (svc->af == AF_INET)
1419 ipvs->num_services--;
1420
1421 ip_vs_stop_estimator(svc->ipvs, &svc->stats);
1422
1423 /* Unbind scheduler */
1424 old_sched = rcu_dereference_protected(svc->scheduler, 1);
1425 ip_vs_unbind_scheduler(svc, old_sched);
1426 ip_vs_scheduler_put(old_sched);
1427
1428 /* Unbind persistence engine, keep svc->pe */
1429 old_pe = rcu_dereference_protected(svc->pe, 1);
1430 if (old_pe && old_pe->conn_out)
1431 atomic_dec(&ipvs->conn_out_counter);
1432 ip_vs_pe_put(old_pe);
1433
1434 /*
1435 * Unlink the whole destination list
1436 */
1437 list_for_each_entry_safe(dest, nxt, &svc->destinations, n_list) {
1438 __ip_vs_unlink_dest(svc, dest, 0);
1439 __ip_vs_del_dest(svc->ipvs, dest, cleanup);
1440 }
1441
1442 /*
1443 * Update the virtual service counters
1444 */
1445 if (svc->port == FTPPORT)
1446 atomic_dec(&ipvs->ftpsvc_counter);
1447 else if (svc->port == 0)
1448 atomic_dec(&ipvs->nullsvc_counter);
1449
1450 /*
1451 * Free the service if nobody refers to it
1452 */
1453 __ip_vs_svc_put(svc, true);
1454
1455 /* decrease the module use count */
1456 ip_vs_use_count_dec();
1457 }
1458
1459 /*
1460 * Unlink a service from list and try to delete it if its refcnt reached 0
1461 */
1462 static void ip_vs_unlink_service(struct ip_vs_service *svc, bool cleanup)
1463 {
1464 /* Hold svc to avoid double release from dest_trash */
1465 atomic_inc(&svc->refcnt);
1466 /*
1467 * Unhash it from the service table
1468 */
1469 ip_vs_svc_unhash(svc);
1470
1471 __ip_vs_del_service(svc, cleanup);
1472 }
1473
1474 /*
1475 * Delete a service from the service list
1476 */
1477 static int ip_vs_del_service(struct ip_vs_service *svc)
1478 {
1479 if (svc == NULL)
1480 return -EEXIST;
1481 ip_vs_unlink_service(svc, false);
1482
1483 return 0;
1484 }
1485
1486
1487 /*
1488 * Flush all the virtual services
1489 */
1490 static int ip_vs_flush(struct netns_ipvs *ipvs, bool cleanup)
1491 {
1492 int idx;
1493 struct ip_vs_service *svc;
1494 struct hlist_node *n;
1495
1496 /*
1497 * Flush the service table hashed by <netns,protocol,addr,port>
1498 */
1499 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1500 hlist_for_each_entry_safe(svc, n, &ip_vs_svc_table[idx],
1501 s_list) {
1502 if (svc->ipvs == ipvs)
1503 ip_vs_unlink_service(svc, cleanup);
1504 }
1505 }
1506
1507 /*
1508 * Flush the service table hashed by fwmark
1509 */
1510 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1511 hlist_for_each_entry_safe(svc, n, &ip_vs_svc_fwm_table[idx],
1512 f_list) {
1513 if (svc->ipvs == ipvs)
1514 ip_vs_unlink_service(svc, cleanup);
1515 }
1516 }
1517
1518 return 0;
1519 }
1520
1521 /*
1522 * Delete service by {netns} in the service table.
1523 * Called by __ip_vs_cleanup()
1524 */
1525 void ip_vs_service_net_cleanup(struct netns_ipvs *ipvs)
1526 {
1527 EnterFunction(2);
1528 /* Check for "full" addressed entries */
1529 mutex_lock(&__ip_vs_mutex);
1530 ip_vs_flush(ipvs, true);
1531 mutex_unlock(&__ip_vs_mutex);
1532 LeaveFunction(2);
1533 }
1534
1535 /* Put all references for device (dst_cache) */
1536 static inline void
1537 ip_vs_forget_dev(struct ip_vs_dest *dest, struct net_device *dev)
1538 {
1539 struct ip_vs_dest_dst *dest_dst;
1540
1541 spin_lock_bh(&dest->dst_lock);
1542 dest_dst = rcu_dereference_protected(dest->dest_dst, 1);
1543 if (dest_dst && dest_dst->dst_cache->dev == dev) {
1544 IP_VS_DBG_BUF(3, "Reset dev:%s dest %s:%u ,dest->refcnt=%d\n",
1545 dev->name,
1546 IP_VS_DBG_ADDR(dest->af, &dest->addr),
1547 ntohs(dest->port),
1548 refcount_read(&dest->refcnt));
1549 __ip_vs_dst_cache_reset(dest);
1550 }
1551 spin_unlock_bh(&dest->dst_lock);
1552
1553 }
1554 /* Netdev event receiver
1555 * Currently only NETDEV_DOWN is handled to release refs to cached dsts
1556 */
1557 static int ip_vs_dst_event(struct notifier_block *this, unsigned long event,
1558 void *ptr)
1559 {
1560 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1561 struct net *net = dev_net(dev);
1562 struct netns_ipvs *ipvs = net_ipvs(net);
1563 struct ip_vs_service *svc;
1564 struct ip_vs_dest *dest;
1565 unsigned int idx;
1566
1567 if (event != NETDEV_DOWN || !ipvs)
1568 return NOTIFY_DONE;
1569 IP_VS_DBG(3, "%s() dev=%s\n", __func__, dev->name);
1570 EnterFunction(2);
1571 mutex_lock(&__ip_vs_mutex);
1572 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1573 hlist_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
1574 if (svc->ipvs == ipvs) {
1575 list_for_each_entry(dest, &svc->destinations,
1576 n_list) {
1577 ip_vs_forget_dev(dest, dev);
1578 }
1579 }
1580 }
1581
1582 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
1583 if (svc->ipvs == ipvs) {
1584 list_for_each_entry(dest, &svc->destinations,
1585 n_list) {
1586 ip_vs_forget_dev(dest, dev);
1587 }
1588 }
1589
1590 }
1591 }
1592
1593 spin_lock_bh(&ipvs->dest_trash_lock);
1594 list_for_each_entry(dest, &ipvs->dest_trash, t_list) {
1595 ip_vs_forget_dev(dest, dev);
1596 }
1597 spin_unlock_bh(&ipvs->dest_trash_lock);
1598 mutex_unlock(&__ip_vs_mutex);
1599 LeaveFunction(2);
1600 return NOTIFY_DONE;
1601 }
1602
1603 /*
1604 * Zero counters in a service or all services
1605 */
1606 static int ip_vs_zero_service(struct ip_vs_service *svc)
1607 {
1608 struct ip_vs_dest *dest;
1609
1610 list_for_each_entry(dest, &svc->destinations, n_list) {
1611 ip_vs_zero_stats(&dest->stats);
1612 }
1613 ip_vs_zero_stats(&svc->stats);
1614 return 0;
1615 }
1616
1617 static int ip_vs_zero_all(struct netns_ipvs *ipvs)
1618 {
1619 int idx;
1620 struct ip_vs_service *svc;
1621
1622 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1623 hlist_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
1624 if (svc->ipvs == ipvs)
1625 ip_vs_zero_service(svc);
1626 }
1627 }
1628
1629 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1630 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
1631 if (svc->ipvs == ipvs)
1632 ip_vs_zero_service(svc);
1633 }
1634 }
1635
1636 ip_vs_zero_stats(&ipvs->tot_stats);
1637 return 0;
1638 }
1639
1640 #ifdef CONFIG_SYSCTL
1641
1642 static int zero;
1643 static int three = 3;
1644
1645 static int
1646 proc_do_defense_mode(struct ctl_table *table, int write,
1647 void __user *buffer, size_t *lenp, loff_t *ppos)
1648 {
1649 struct netns_ipvs *ipvs = table->extra2;
1650 int *valp = table->data;
1651 int val = *valp;
1652 int rc;
1653
1654 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1655 if (write && (*valp != val)) {
1656 if ((*valp < 0) || (*valp > 3)) {
1657 /* Restore the correct value */
1658 *valp = val;
1659 } else {
1660 update_defense_level(ipvs);
1661 }
1662 }
1663 return rc;
1664 }
1665
1666 static int
1667 proc_do_sync_threshold(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[2];
1672 int rc;
1673
1674 /* backup the value first */
1675 memcpy(val, valp, sizeof(val));
1676
1677 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1678 if (write && (valp[0] < 0 || valp[1] < 0 ||
1679 (valp[0] >= valp[1] && valp[1]))) {
1680 /* Restore the correct value */
1681 memcpy(valp, val, sizeof(val));
1682 }
1683 return rc;
1684 }
1685
1686 static int
1687 proc_do_sync_mode(struct ctl_table *table, int write,
1688 void __user *buffer, size_t *lenp, loff_t *ppos)
1689 {
1690 int *valp = table->data;
1691 int val = *valp;
1692 int rc;
1693
1694 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1695 if (write && (*valp != val)) {
1696 if ((*valp < 0) || (*valp > 1)) {
1697 /* Restore the correct value */
1698 *valp = val;
1699 }
1700 }
1701 return rc;
1702 }
1703
1704 static int
1705 proc_do_sync_ports(struct ctl_table *table, int write,
1706 void __user *buffer, size_t *lenp, loff_t *ppos)
1707 {
1708 int *valp = table->data;
1709 int val = *valp;
1710 int rc;
1711
1712 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1713 if (write && (*valp != val)) {
1714 if (*valp < 1 || !is_power_of_2(*valp)) {
1715 /* Restore the correct value */
1716 *valp = val;
1717 }
1718 }
1719 return rc;
1720 }
1721
1722 /*
1723 * IPVS sysctl table (under the /proc/sys/net/ipv4/vs/)
1724 * Do not change order or insert new entries without
1725 * align with netns init in ip_vs_control_net_init()
1726 */
1727
1728 static struct ctl_table vs_vars[] = {
1729 {
1730 .procname = "amemthresh",
1731 .maxlen = sizeof(int),
1732 .mode = 0644,
1733 .proc_handler = proc_dointvec,
1734 },
1735 {
1736 .procname = "am_droprate",
1737 .maxlen = sizeof(int),
1738 .mode = 0644,
1739 .proc_handler = proc_dointvec,
1740 },
1741 {
1742 .procname = "drop_entry",
1743 .maxlen = sizeof(int),
1744 .mode = 0644,
1745 .proc_handler = proc_do_defense_mode,
1746 },
1747 {
1748 .procname = "drop_packet",
1749 .maxlen = sizeof(int),
1750 .mode = 0644,
1751 .proc_handler = proc_do_defense_mode,
1752 },
1753 #ifdef CONFIG_IP_VS_NFCT
1754 {
1755 .procname = "conntrack",
1756 .maxlen = sizeof(int),
1757 .mode = 0644,
1758 .proc_handler = &proc_dointvec,
1759 },
1760 #endif
1761 {
1762 .procname = "secure_tcp",
1763 .maxlen = sizeof(int),
1764 .mode = 0644,
1765 .proc_handler = proc_do_defense_mode,
1766 },
1767 {
1768 .procname = "snat_reroute",
1769 .maxlen = sizeof(int),
1770 .mode = 0644,
1771 .proc_handler = &proc_dointvec,
1772 },
1773 {
1774 .procname = "sync_version",
1775 .maxlen = sizeof(int),
1776 .mode = 0644,
1777 .proc_handler = proc_do_sync_mode,
1778 },
1779 {
1780 .procname = "sync_ports",
1781 .maxlen = sizeof(int),
1782 .mode = 0644,
1783 .proc_handler = proc_do_sync_ports,
1784 },
1785 {
1786 .procname = "sync_persist_mode",
1787 .maxlen = sizeof(int),
1788 .mode = 0644,
1789 .proc_handler = proc_dointvec,
1790 },
1791 {
1792 .procname = "sync_qlen_max",
1793 .maxlen = sizeof(unsigned long),
1794 .mode = 0644,
1795 .proc_handler = proc_doulongvec_minmax,
1796 },
1797 {
1798 .procname = "sync_sock_size",
1799 .maxlen = sizeof(int),
1800 .mode = 0644,
1801 .proc_handler = proc_dointvec,
1802 },
1803 {
1804 .procname = "cache_bypass",
1805 .maxlen = sizeof(int),
1806 .mode = 0644,
1807 .proc_handler = proc_dointvec,
1808 },
1809 {
1810 .procname = "expire_nodest_conn",
1811 .maxlen = sizeof(int),
1812 .mode = 0644,
1813 .proc_handler = proc_dointvec,
1814 },
1815 {
1816 .procname = "sloppy_tcp",
1817 .maxlen = sizeof(int),
1818 .mode = 0644,
1819 .proc_handler = proc_dointvec,
1820 },
1821 {
1822 .procname = "sloppy_sctp",
1823 .maxlen = sizeof(int),
1824 .mode = 0644,
1825 .proc_handler = proc_dointvec,
1826 },
1827 {
1828 .procname = "expire_quiescent_template",
1829 .maxlen = sizeof(int),
1830 .mode = 0644,
1831 .proc_handler = proc_dointvec,
1832 },
1833 {
1834 .procname = "sync_threshold",
1835 .maxlen =
1836 sizeof(((struct netns_ipvs *)0)->sysctl_sync_threshold),
1837 .mode = 0644,
1838 .proc_handler = proc_do_sync_threshold,
1839 },
1840 {
1841 .procname = "sync_refresh_period",
1842 .maxlen = sizeof(int),
1843 .mode = 0644,
1844 .proc_handler = proc_dointvec_jiffies,
1845 },
1846 {
1847 .procname = "sync_retries",
1848 .maxlen = sizeof(int),
1849 .mode = 0644,
1850 .proc_handler = proc_dointvec_minmax,
1851 .extra1 = &zero,
1852 .extra2 = &three,
1853 },
1854 {
1855 .procname = "nat_icmp_send",
1856 .maxlen = sizeof(int),
1857 .mode = 0644,
1858 .proc_handler = proc_dointvec,
1859 },
1860 {
1861 .procname = "pmtu_disc",
1862 .maxlen = sizeof(int),
1863 .mode = 0644,
1864 .proc_handler = proc_dointvec,
1865 },
1866 {
1867 .procname = "backup_only",
1868 .maxlen = sizeof(int),
1869 .mode = 0644,
1870 .proc_handler = proc_dointvec,
1871 },
1872 {
1873 .procname = "conn_reuse_mode",
1874 .maxlen = sizeof(int),
1875 .mode = 0644,
1876 .proc_handler = proc_dointvec,
1877 },
1878 {
1879 .procname = "schedule_icmp",
1880 .maxlen = sizeof(int),
1881 .mode = 0644,
1882 .proc_handler = proc_dointvec,
1883 },
1884 {
1885 .procname = "ignore_tunneled",
1886 .maxlen = sizeof(int),
1887 .mode = 0644,
1888 .proc_handler = proc_dointvec,
1889 },
1890 #ifdef CONFIG_IP_VS_DEBUG
1891 {
1892 .procname = "debug_level",
1893 .data = &sysctl_ip_vs_debug_level,
1894 .maxlen = sizeof(int),
1895 .mode = 0644,
1896 .proc_handler = proc_dointvec,
1897 },
1898 #endif
1899 { }
1900 };
1901
1902 #endif
1903
1904 #ifdef CONFIG_PROC_FS
1905
1906 struct ip_vs_iter {
1907 struct seq_net_private p; /* Do not move this, netns depends upon it*/
1908 struct hlist_head *table;
1909 int bucket;
1910 };
1911
1912 /*
1913 * Write the contents of the VS rule table to a PROCfs file.
1914 * (It is kept just for backward compatibility)
1915 */
1916 static inline const char *ip_vs_fwd_name(unsigned int flags)
1917 {
1918 switch (flags & IP_VS_CONN_F_FWD_MASK) {
1919 case IP_VS_CONN_F_LOCALNODE:
1920 return "Local";
1921 case IP_VS_CONN_F_TUNNEL:
1922 return "Tunnel";
1923 case IP_VS_CONN_F_DROUTE:
1924 return "Route";
1925 default:
1926 return "Masq";
1927 }
1928 }
1929
1930
1931 /* Get the Nth entry in the two lists */
1932 static struct ip_vs_service *ip_vs_info_array(struct seq_file *seq, loff_t pos)
1933 {
1934 struct net *net = seq_file_net(seq);
1935 struct netns_ipvs *ipvs = net_ipvs(net);
1936 struct ip_vs_iter *iter = seq->private;
1937 int idx;
1938 struct ip_vs_service *svc;
1939
1940 /* look in hash by protocol */
1941 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1942 hlist_for_each_entry_rcu(svc, &ip_vs_svc_table[idx], s_list) {
1943 if ((svc->ipvs == ipvs) && pos-- == 0) {
1944 iter->table = ip_vs_svc_table;
1945 iter->bucket = idx;
1946 return svc;
1947 }
1948 }
1949 }
1950
1951 /* keep looking in fwmark */
1952 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1953 hlist_for_each_entry_rcu(svc, &ip_vs_svc_fwm_table[idx],
1954 f_list) {
1955 if ((svc->ipvs == ipvs) && pos-- == 0) {
1956 iter->table = ip_vs_svc_fwm_table;
1957 iter->bucket = idx;
1958 return svc;
1959 }
1960 }
1961 }
1962
1963 return NULL;
1964 }
1965
1966 static void *ip_vs_info_seq_start(struct seq_file *seq, loff_t *pos)
1967 __acquires(RCU)
1968 {
1969 rcu_read_lock();
1970 return *pos ? ip_vs_info_array(seq, *pos - 1) : SEQ_START_TOKEN;
1971 }
1972
1973
1974 static void *ip_vs_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1975 {
1976 struct hlist_node *e;
1977 struct ip_vs_iter *iter;
1978 struct ip_vs_service *svc;
1979
1980 ++*pos;
1981 if (v == SEQ_START_TOKEN)
1982 return ip_vs_info_array(seq,0);
1983
1984 svc = v;
1985 iter = seq->private;
1986
1987 if (iter->table == ip_vs_svc_table) {
1988 /* next service in table hashed by protocol */
1989 e = rcu_dereference(hlist_next_rcu(&svc->s_list));
1990 if (e)
1991 return hlist_entry(e, struct ip_vs_service, s_list);
1992
1993 while (++iter->bucket < IP_VS_SVC_TAB_SIZE) {
1994 hlist_for_each_entry_rcu(svc,
1995 &ip_vs_svc_table[iter->bucket],
1996 s_list) {
1997 return svc;
1998 }
1999 }
2000
2001 iter->table = ip_vs_svc_fwm_table;
2002 iter->bucket = -1;
2003 goto scan_fwmark;
2004 }
2005
2006 /* next service in hashed by fwmark */
2007 e = rcu_dereference(hlist_next_rcu(&svc->f_list));
2008 if (e)
2009 return hlist_entry(e, struct ip_vs_service, f_list);
2010
2011 scan_fwmark:
2012 while (++iter->bucket < IP_VS_SVC_TAB_SIZE) {
2013 hlist_for_each_entry_rcu(svc,
2014 &ip_vs_svc_fwm_table[iter->bucket],
2015 f_list)
2016 return svc;
2017 }
2018
2019 return NULL;
2020 }
2021
2022 static void ip_vs_info_seq_stop(struct seq_file *seq, void *v)
2023 __releases(RCU)
2024 {
2025 rcu_read_unlock();
2026 }
2027
2028
2029 static int ip_vs_info_seq_show(struct seq_file *seq, void *v)
2030 {
2031 if (v == SEQ_START_TOKEN) {
2032 seq_printf(seq,
2033 "IP Virtual Server version %d.%d.%d (size=%d)\n",
2034 NVERSION(IP_VS_VERSION_CODE), ip_vs_conn_tab_size);
2035 seq_puts(seq,
2036 "Prot LocalAddress:Port Scheduler Flags\n");
2037 seq_puts(seq,
2038 " -> RemoteAddress:Port Forward Weight ActiveConn InActConn\n");
2039 } else {
2040 const struct ip_vs_service *svc = v;
2041 const struct ip_vs_iter *iter = seq->private;
2042 const struct ip_vs_dest *dest;
2043 struct ip_vs_scheduler *sched = rcu_dereference(svc->scheduler);
2044 char *sched_name = sched ? sched->name : "none";
2045
2046 if (iter->table == ip_vs_svc_table) {
2047 #ifdef CONFIG_IP_VS_IPV6
2048 if (svc->af == AF_INET6)
2049 seq_printf(seq, "%s [%pI6]:%04X %s ",
2050 ip_vs_proto_name(svc->protocol),
2051 &svc->addr.in6,
2052 ntohs(svc->port),
2053 sched_name);
2054 else
2055 #endif
2056 seq_printf(seq, "%s %08X:%04X %s %s ",
2057 ip_vs_proto_name(svc->protocol),
2058 ntohl(svc->addr.ip),
2059 ntohs(svc->port),
2060 sched_name,
2061 (svc->flags & IP_VS_SVC_F_ONEPACKET)?"ops ":"");
2062 } else {
2063 seq_printf(seq, "FWM %08X %s %s",
2064 svc->fwmark, sched_name,
2065 (svc->flags & IP_VS_SVC_F_ONEPACKET)?"ops ":"");
2066 }
2067
2068 if (svc->flags & IP_VS_SVC_F_PERSISTENT)
2069 seq_printf(seq, "persistent %d %08X\n",
2070 svc->timeout,
2071 ntohl(svc->netmask));
2072 else
2073 seq_putc(seq, '\n');
2074
2075 list_for_each_entry_rcu(dest, &svc->destinations, n_list) {
2076 #ifdef CONFIG_IP_VS_IPV6
2077 if (dest->af == AF_INET6)
2078 seq_printf(seq,
2079 " -> [%pI6]:%04X"
2080 " %-7s %-6d %-10d %-10d\n",
2081 &dest->addr.in6,
2082 ntohs(dest->port),
2083 ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
2084 atomic_read(&dest->weight),
2085 atomic_read(&dest->activeconns),
2086 atomic_read(&dest->inactconns));
2087 else
2088 #endif
2089 seq_printf(seq,
2090 " -> %08X:%04X "
2091 "%-7s %-6d %-10d %-10d\n",
2092 ntohl(dest->addr.ip),
2093 ntohs(dest->port),
2094 ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
2095 atomic_read(&dest->weight),
2096 atomic_read(&dest->activeconns),
2097 atomic_read(&dest->inactconns));
2098
2099 }
2100 }
2101 return 0;
2102 }
2103
2104 static const struct seq_operations ip_vs_info_seq_ops = {
2105 .start = ip_vs_info_seq_start,
2106 .next = ip_vs_info_seq_next,
2107 .stop = ip_vs_info_seq_stop,
2108 .show = ip_vs_info_seq_show,
2109 };
2110
2111 static int ip_vs_info_open(struct inode *inode, struct file *file)
2112 {
2113 return seq_open_net(inode, file, &ip_vs_info_seq_ops,
2114 sizeof(struct ip_vs_iter));
2115 }
2116
2117 static const struct file_operations ip_vs_info_fops = {
2118 .owner = THIS_MODULE,
2119 .open = ip_vs_info_open,
2120 .read = seq_read,
2121 .llseek = seq_lseek,
2122 .release = seq_release_net,
2123 };
2124
2125 static int ip_vs_stats_show(struct seq_file *seq, void *v)
2126 {
2127 struct net *net = seq_file_single_net(seq);
2128 struct ip_vs_kstats show;
2129
2130 /* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2131 seq_puts(seq,
2132 " Total Incoming Outgoing Incoming Outgoing\n");
2133 seq_puts(seq,
2134 " Conns Packets Packets Bytes Bytes\n");
2135
2136 ip_vs_copy_stats(&show, &net_ipvs(net)->tot_stats);
2137 seq_printf(seq, "%8LX %8LX %8LX %16LX %16LX\n\n",
2138 (unsigned long long)show.conns,
2139 (unsigned long long)show.inpkts,
2140 (unsigned long long)show.outpkts,
2141 (unsigned long long)show.inbytes,
2142 (unsigned long long)show.outbytes);
2143
2144 /* 01234567 01234567 01234567 0123456701234567 0123456701234567*/
2145 seq_puts(seq,
2146 " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
2147 seq_printf(seq, "%8LX %8LX %8LX %16LX %16LX\n",
2148 (unsigned long long)show.cps,
2149 (unsigned long long)show.inpps,
2150 (unsigned long long)show.outpps,
2151 (unsigned long long)show.inbps,
2152 (unsigned long long)show.outbps);
2153
2154 return 0;
2155 }
2156
2157 static int ip_vs_stats_seq_open(struct inode *inode, struct file *file)
2158 {
2159 return single_open_net(inode, file, ip_vs_stats_show);
2160 }
2161
2162 static const struct file_operations ip_vs_stats_fops = {
2163 .owner = THIS_MODULE,
2164 .open = ip_vs_stats_seq_open,
2165 .read = seq_read,
2166 .llseek = seq_lseek,
2167 .release = single_release_net,
2168 };
2169
2170 static int ip_vs_stats_percpu_show(struct seq_file *seq, void *v)
2171 {
2172 struct net *net = seq_file_single_net(seq);
2173 struct ip_vs_stats *tot_stats = &net_ipvs(net)->tot_stats;
2174 struct ip_vs_cpu_stats __percpu *cpustats = tot_stats->cpustats;
2175 struct ip_vs_kstats kstats;
2176 int i;
2177
2178 /* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2179 seq_puts(seq,
2180 " Total Incoming Outgoing Incoming Outgoing\n");
2181 seq_puts(seq,
2182 "CPU Conns Packets Packets Bytes Bytes\n");
2183
2184 for_each_possible_cpu(i) {
2185 struct ip_vs_cpu_stats *u = per_cpu_ptr(cpustats, i);
2186 unsigned int start;
2187 u64 conns, inpkts, outpkts, inbytes, outbytes;
2188
2189 do {
2190 start = u64_stats_fetch_begin_irq(&u->syncp);
2191 conns = u->cnt.conns;
2192 inpkts = u->cnt.inpkts;
2193 outpkts = u->cnt.outpkts;
2194 inbytes = u->cnt.inbytes;
2195 outbytes = u->cnt.outbytes;
2196 } while (u64_stats_fetch_retry_irq(&u->syncp, start));
2197
2198 seq_printf(seq, "%3X %8LX %8LX %8LX %16LX %16LX\n",
2199 i, (u64)conns, (u64)inpkts,
2200 (u64)outpkts, (u64)inbytes,
2201 (u64)outbytes);
2202 }
2203
2204 ip_vs_copy_stats(&kstats, tot_stats);
2205
2206 seq_printf(seq, " ~ %8LX %8LX %8LX %16LX %16LX\n\n",
2207 (unsigned long long)kstats.conns,
2208 (unsigned long long)kstats.inpkts,
2209 (unsigned long long)kstats.outpkts,
2210 (unsigned long long)kstats.inbytes,
2211 (unsigned long long)kstats.outbytes);
2212
2213 /* ... 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2214 seq_puts(seq,
2215 " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
2216 seq_printf(seq, " %8LX %8LX %8LX %16LX %16LX\n",
2217 kstats.cps,
2218 kstats.inpps,
2219 kstats.outpps,
2220 kstats.inbps,
2221 kstats.outbps);
2222
2223 return 0;
2224 }
2225
2226 static int ip_vs_stats_percpu_seq_open(struct inode *inode, struct file *file)
2227 {
2228 return single_open_net(inode, file, ip_vs_stats_percpu_show);
2229 }
2230
2231 static const struct file_operations ip_vs_stats_percpu_fops = {
2232 .owner = THIS_MODULE,
2233 .open = ip_vs_stats_percpu_seq_open,
2234 .read = seq_read,
2235 .llseek = seq_lseek,
2236 .release = single_release_net,
2237 };
2238 #endif
2239
2240 /*
2241 * Set timeout values for tcp tcpfin udp in the timeout_table.
2242 */
2243 static int ip_vs_set_timeout(struct netns_ipvs *ipvs, struct ip_vs_timeout_user *u)
2244 {
2245 #if defined(CONFIG_IP_VS_PROTO_TCP) || defined(CONFIG_IP_VS_PROTO_UDP)
2246 struct ip_vs_proto_data *pd;
2247 #endif
2248
2249 IP_VS_DBG(2, "Setting timeout tcp:%d tcpfin:%d udp:%d\n",
2250 u->tcp_timeout,
2251 u->tcp_fin_timeout,
2252 u->udp_timeout);
2253
2254 #ifdef CONFIG_IP_VS_PROTO_TCP
2255 if (u->tcp_timeout) {
2256 pd = ip_vs_proto_data_get(ipvs, IPPROTO_TCP);
2257 pd->timeout_table[IP_VS_TCP_S_ESTABLISHED]
2258 = u->tcp_timeout * HZ;
2259 }
2260
2261 if (u->tcp_fin_timeout) {
2262 pd = ip_vs_proto_data_get(ipvs, IPPROTO_TCP);
2263 pd->timeout_table[IP_VS_TCP_S_FIN_WAIT]
2264 = u->tcp_fin_timeout * HZ;
2265 }
2266 #endif
2267
2268 #ifdef CONFIG_IP_VS_PROTO_UDP
2269 if (u->udp_timeout) {
2270 pd = ip_vs_proto_data_get(ipvs, IPPROTO_UDP);
2271 pd->timeout_table[IP_VS_UDP_S_NORMAL]
2272 = u->udp_timeout * HZ;
2273 }
2274 #endif
2275 return 0;
2276 }
2277
2278 #define CMDID(cmd) (cmd - IP_VS_BASE_CTL)
2279
2280 struct ip_vs_svcdest_user {
2281 struct ip_vs_service_user s;
2282 struct ip_vs_dest_user d;
2283 };
2284
2285 static const unsigned char set_arglen[CMDID(IP_VS_SO_SET_MAX) + 1] = {
2286 [CMDID(IP_VS_SO_SET_ADD)] = sizeof(struct ip_vs_service_user),
2287 [CMDID(IP_VS_SO_SET_EDIT)] = sizeof(struct ip_vs_service_user),
2288 [CMDID(IP_VS_SO_SET_DEL)] = sizeof(struct ip_vs_service_user),
2289 [CMDID(IP_VS_SO_SET_ADDDEST)] = sizeof(struct ip_vs_svcdest_user),
2290 [CMDID(IP_VS_SO_SET_DELDEST)] = sizeof(struct ip_vs_svcdest_user),
2291 [CMDID(IP_VS_SO_SET_EDITDEST)] = sizeof(struct ip_vs_svcdest_user),
2292 [CMDID(IP_VS_SO_SET_TIMEOUT)] = sizeof(struct ip_vs_timeout_user),
2293 [CMDID(IP_VS_SO_SET_STARTDAEMON)] = sizeof(struct ip_vs_daemon_user),
2294 [CMDID(IP_VS_SO_SET_STOPDAEMON)] = sizeof(struct ip_vs_daemon_user),
2295 [CMDID(IP_VS_SO_SET_ZERO)] = sizeof(struct ip_vs_service_user),
2296 };
2297
2298 union ip_vs_set_arglen {
2299 struct ip_vs_service_user field_IP_VS_SO_SET_ADD;
2300 struct ip_vs_service_user field_IP_VS_SO_SET_EDIT;
2301 struct ip_vs_service_user field_IP_VS_SO_SET_DEL;
2302 struct ip_vs_svcdest_user field_IP_VS_SO_SET_ADDDEST;
2303 struct ip_vs_svcdest_user field_IP_VS_SO_SET_DELDEST;
2304 struct ip_vs_svcdest_user field_IP_VS_SO_SET_EDITDEST;
2305 struct ip_vs_timeout_user field_IP_VS_SO_SET_TIMEOUT;
2306 struct ip_vs_daemon_user field_IP_VS_SO_SET_STARTDAEMON;
2307 struct ip_vs_daemon_user field_IP_VS_SO_SET_STOPDAEMON;
2308 struct ip_vs_service_user field_IP_VS_SO_SET_ZERO;
2309 };
2310
2311 #define MAX_SET_ARGLEN sizeof(union ip_vs_set_arglen)
2312
2313 static void ip_vs_copy_usvc_compat(struct ip_vs_service_user_kern *usvc,
2314 struct ip_vs_service_user *usvc_compat)
2315 {
2316 memset(usvc, 0, sizeof(*usvc));
2317
2318 usvc->af = AF_INET;
2319 usvc->protocol = usvc_compat->protocol;
2320 usvc->addr.ip = usvc_compat->addr;
2321 usvc->port = usvc_compat->port;
2322 usvc->fwmark = usvc_compat->fwmark;
2323
2324 /* Deep copy of sched_name is not needed here */
2325 usvc->sched_name = usvc_compat->sched_name;
2326
2327 usvc->flags = usvc_compat->flags;
2328 usvc->timeout = usvc_compat->timeout;
2329 usvc->netmask = usvc_compat->netmask;
2330 }
2331
2332 static void ip_vs_copy_udest_compat(struct ip_vs_dest_user_kern *udest,
2333 struct ip_vs_dest_user *udest_compat)
2334 {
2335 memset(udest, 0, sizeof(*udest));
2336
2337 udest->addr.ip = udest_compat->addr;
2338 udest->port = udest_compat->port;
2339 udest->conn_flags = udest_compat->conn_flags;
2340 udest->weight = udest_compat->weight;
2341 udest->u_threshold = udest_compat->u_threshold;
2342 udest->l_threshold = udest_compat->l_threshold;
2343 udest->af = AF_INET;
2344 }
2345
2346 static int
2347 do_ip_vs_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len)
2348 {
2349 struct net *net = sock_net(sk);
2350 int ret;
2351 unsigned char arg[MAX_SET_ARGLEN];
2352 struct ip_vs_service_user *usvc_compat;
2353 struct ip_vs_service_user_kern usvc;
2354 struct ip_vs_service *svc;
2355 struct ip_vs_dest_user *udest_compat;
2356 struct ip_vs_dest_user_kern udest;
2357 struct netns_ipvs *ipvs = net_ipvs(net);
2358
2359 BUILD_BUG_ON(sizeof(arg) > 255);
2360 if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
2361 return -EPERM;
2362
2363 if (cmd < IP_VS_BASE_CTL || cmd > IP_VS_SO_SET_MAX)
2364 return -EINVAL;
2365 if (len != set_arglen[CMDID(cmd)]) {
2366 IP_VS_DBG(1, "set_ctl: len %u != %u\n",
2367 len, set_arglen[CMDID(cmd)]);
2368 return -EINVAL;
2369 }
2370
2371 if (copy_from_user(arg, user, len) != 0)
2372 return -EFAULT;
2373
2374 /* increase the module use count */
2375 ip_vs_use_count_inc();
2376
2377 /* Handle daemons since they have another lock */
2378 if (cmd == IP_VS_SO_SET_STARTDAEMON ||
2379 cmd == IP_VS_SO_SET_STOPDAEMON) {
2380 struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg;
2381
2382 if (cmd == IP_VS_SO_SET_STARTDAEMON) {
2383 struct ipvs_sync_daemon_cfg cfg;
2384
2385 memset(&cfg, 0, sizeof(cfg));
2386 strlcpy(cfg.mcast_ifn, dm->mcast_ifn,
2387 sizeof(cfg.mcast_ifn));
2388 cfg.syncid = dm->syncid;
2389 rtnl_lock();
2390 mutex_lock(&ipvs->sync_mutex);
2391 ret = start_sync_thread(ipvs, &cfg, dm->state);
2392 mutex_unlock(&ipvs->sync_mutex);
2393 rtnl_unlock();
2394 } else {
2395 mutex_lock(&ipvs->sync_mutex);
2396 ret = stop_sync_thread(ipvs, dm->state);
2397 mutex_unlock(&ipvs->sync_mutex);
2398 }
2399 goto out_dec;
2400 }
2401
2402 mutex_lock(&__ip_vs_mutex);
2403 if (cmd == IP_VS_SO_SET_FLUSH) {
2404 /* Flush the virtual service */
2405 ret = ip_vs_flush(ipvs, false);
2406 goto out_unlock;
2407 } else if (cmd == IP_VS_SO_SET_TIMEOUT) {
2408 /* Set timeout values for (tcp tcpfin udp) */
2409 ret = ip_vs_set_timeout(ipvs, (struct ip_vs_timeout_user *)arg);
2410 goto out_unlock;
2411 }
2412
2413 usvc_compat = (struct ip_vs_service_user *)arg;
2414 udest_compat = (struct ip_vs_dest_user *)(usvc_compat + 1);
2415
2416 /* We only use the new structs internally, so copy userspace compat
2417 * structs to extended internal versions */
2418 ip_vs_copy_usvc_compat(&usvc, usvc_compat);
2419 ip_vs_copy_udest_compat(&udest, udest_compat);
2420
2421 if (cmd == IP_VS_SO_SET_ZERO) {
2422 /* if no service address is set, zero counters in all */
2423 if (!usvc.fwmark && !usvc.addr.ip && !usvc.port) {
2424 ret = ip_vs_zero_all(ipvs);
2425 goto out_unlock;
2426 }
2427 }
2428
2429 /* Check for valid protocol: TCP or UDP or SCTP, even for fwmark!=0 */
2430 if (usvc.protocol != IPPROTO_TCP && usvc.protocol != IPPROTO_UDP &&
2431 usvc.protocol != IPPROTO_SCTP) {
2432 pr_err("set_ctl: invalid protocol: %d %pI4:%d %s\n",
2433 usvc.protocol, &usvc.addr.ip,
2434 ntohs(usvc.port), usvc.sched_name);
2435 ret = -EFAULT;
2436 goto out_unlock;
2437 }
2438
2439 /* Lookup the exact service by <protocol, addr, port> or fwmark */
2440 rcu_read_lock();
2441 if (usvc.fwmark == 0)
2442 svc = __ip_vs_service_find(ipvs, usvc.af, usvc.protocol,
2443 &usvc.addr, usvc.port);
2444 else
2445 svc = __ip_vs_svc_fwm_find(ipvs, usvc.af, usvc.fwmark);
2446 rcu_read_unlock();
2447
2448 if (cmd != IP_VS_SO_SET_ADD
2449 && (svc == NULL || svc->protocol != usvc.protocol)) {
2450 ret = -ESRCH;
2451 goto out_unlock;
2452 }
2453
2454 switch (cmd) {
2455 case IP_VS_SO_SET_ADD:
2456 if (svc != NULL)
2457 ret = -EEXIST;
2458 else
2459 ret = ip_vs_add_service(ipvs, &usvc, &svc);
2460 break;
2461 case IP_VS_SO_SET_EDIT:
2462 ret = ip_vs_edit_service(svc, &usvc);
2463 break;
2464 case IP_VS_SO_SET_DEL:
2465 ret = ip_vs_del_service(svc);
2466 if (!ret)
2467 goto out_unlock;
2468 break;
2469 case IP_VS_SO_SET_ZERO:
2470 ret = ip_vs_zero_service(svc);
2471 break;
2472 case IP_VS_SO_SET_ADDDEST:
2473 ret = ip_vs_add_dest(svc, &udest);
2474 break;
2475 case IP_VS_SO_SET_EDITDEST:
2476 ret = ip_vs_edit_dest(svc, &udest);
2477 break;
2478 case IP_VS_SO_SET_DELDEST:
2479 ret = ip_vs_del_dest(svc, &udest);
2480 break;
2481 default:
2482 ret = -EINVAL;
2483 }
2484
2485 out_unlock:
2486 mutex_unlock(&__ip_vs_mutex);
2487 out_dec:
2488 /* decrease the module use count */
2489 ip_vs_use_count_dec();
2490
2491 return ret;
2492 }
2493
2494
2495 static void
2496 ip_vs_copy_service(struct ip_vs_service_entry *dst, struct ip_vs_service *src)
2497 {
2498 struct ip_vs_scheduler *sched;
2499 struct ip_vs_kstats kstats;
2500 char *sched_name;
2501
2502 sched = rcu_dereference_protected(src->scheduler, 1);
2503 sched_name = sched ? sched->name : "none";
2504 dst->protocol = src->protocol;
2505 dst->addr = src->addr.ip;
2506 dst->port = src->port;
2507 dst->fwmark = src->fwmark;
2508 strlcpy(dst->sched_name, sched_name, sizeof(dst->sched_name));
2509 dst->flags = src->flags;
2510 dst->timeout = src->timeout / HZ;
2511 dst->netmask = src->netmask;
2512 dst->num_dests = src->num_dests;
2513 ip_vs_copy_stats(&kstats, &src->stats);
2514 ip_vs_export_stats_user(&dst->stats, &kstats);
2515 }
2516
2517 static inline int
2518 __ip_vs_get_service_entries(struct netns_ipvs *ipvs,
2519 const struct ip_vs_get_services *get,
2520 struct ip_vs_get_services __user *uptr)
2521 {
2522 int idx, count=0;
2523 struct ip_vs_service *svc;
2524 struct ip_vs_service_entry entry;
2525 int ret = 0;
2526
2527 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
2528 hlist_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
2529 /* Only expose IPv4 entries to old interface */
2530 if (svc->af != AF_INET || (svc->ipvs != ipvs))
2531 continue;
2532
2533 if (count >= get->num_services)
2534 goto out;
2535 memset(&entry, 0, sizeof(entry));
2536 ip_vs_copy_service(&entry, svc);
2537 if (copy_to_user(&uptr->entrytable[count],
2538 &entry, sizeof(entry))) {
2539 ret = -EFAULT;
2540 goto out;
2541 }
2542 count++;
2543 }
2544 }
2545
2546 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
2547 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
2548 /* Only expose IPv4 entries to old interface */
2549 if (svc->af != AF_INET || (svc->ipvs != ipvs))
2550 continue;
2551
2552 if (count >= get->num_services)
2553 goto out;
2554 memset(&entry, 0, sizeof(entry));
2555 ip_vs_copy_service(&entry, svc);
2556 if (copy_to_user(&uptr->entrytable[count],
2557 &entry, sizeof(entry))) {
2558 ret = -EFAULT;
2559 goto out;
2560 }
2561 count++;
2562 }
2563 }
2564 out:
2565 return ret;
2566 }
2567
2568 static inline int
2569 __ip_vs_get_dest_entries(struct netns_ipvs *ipvs, const struct ip_vs_get_dests *get,
2570 struct ip_vs_get_dests __user *uptr)
2571 {
2572 struct ip_vs_service *svc;
2573 union nf_inet_addr addr = { .ip = get->addr };
2574 int ret = 0;
2575
2576 rcu_read_lock();
2577 if (get->fwmark)
2578 svc = __ip_vs_svc_fwm_find(ipvs, AF_INET, get->fwmark);
2579 else
2580 svc = __ip_vs_service_find(ipvs, AF_INET, get->protocol, &addr,
2581 get->port);
2582 rcu_read_unlock();
2583
2584 if (svc) {
2585 int count = 0;
2586 struct ip_vs_dest *dest;
2587 struct ip_vs_dest_entry entry;
2588 struct ip_vs_kstats kstats;
2589
2590 memset(&entry, 0, sizeof(entry));
2591 list_for_each_entry(dest, &svc->destinations, n_list) {
2592 if (count >= get->num_dests)
2593 break;
2594
2595 /* Cannot expose heterogeneous members via sockopt
2596 * interface
2597 */
2598 if (dest->af != svc->af)
2599 continue;
2600
2601 entry.addr = dest->addr.ip;
2602 entry.port = dest->port;
2603 entry.conn_flags = atomic_read(&dest->conn_flags);
2604 entry.weight = atomic_read(&dest->weight);
2605 entry.u_threshold = dest->u_threshold;
2606 entry.l_threshold = dest->l_threshold;
2607 entry.activeconns = atomic_read(&dest->activeconns);
2608 entry.inactconns = atomic_read(&dest->inactconns);
2609 entry.persistconns = atomic_read(&dest->persistconns);
2610 ip_vs_copy_stats(&kstats, &dest->stats);
2611 ip_vs_export_stats_user(&entry.stats, &kstats);
2612 if (copy_to_user(&uptr->entrytable[count],
2613 &entry, sizeof(entry))) {
2614 ret = -EFAULT;
2615 break;
2616 }
2617 count++;
2618 }
2619 } else
2620 ret = -ESRCH;
2621 return ret;
2622 }
2623
2624 static inline void
2625 __ip_vs_get_timeouts(struct netns_ipvs *ipvs, struct ip_vs_timeout_user *u)
2626 {
2627 #if defined(CONFIG_IP_VS_PROTO_TCP) || defined(CONFIG_IP_VS_PROTO_UDP)
2628 struct ip_vs_proto_data *pd;
2629 #endif
2630
2631 memset(u, 0, sizeof (*u));
2632
2633 #ifdef CONFIG_IP_VS_PROTO_TCP
2634 pd = ip_vs_proto_data_get(ipvs, IPPROTO_TCP);
2635 u->tcp_timeout = pd->timeout_table[IP_VS_TCP_S_ESTABLISHED] / HZ;
2636 u->tcp_fin_timeout = pd->timeout_table[IP_VS_TCP_S_FIN_WAIT] / HZ;
2637 #endif
2638 #ifdef CONFIG_IP_VS_PROTO_UDP
2639 pd = ip_vs_proto_data_get(ipvs, IPPROTO_UDP);
2640 u->udp_timeout =
2641 pd->timeout_table[IP_VS_UDP_S_NORMAL] / HZ;
2642 #endif
2643 }
2644
2645 static const unsigned char get_arglen[CMDID(IP_VS_SO_GET_MAX) + 1] = {
2646 [CMDID(IP_VS_SO_GET_VERSION)] = 64,
2647 [CMDID(IP_VS_SO_GET_INFO)] = sizeof(struct ip_vs_getinfo),
2648 [CMDID(IP_VS_SO_GET_SERVICES)] = sizeof(struct ip_vs_get_services),
2649 [CMDID(IP_VS_SO_GET_SERVICE)] = sizeof(struct ip_vs_service_entry),
2650 [CMDID(IP_VS_SO_GET_DESTS)] = sizeof(struct ip_vs_get_dests),
2651 [CMDID(IP_VS_SO_GET_TIMEOUT)] = sizeof(struct ip_vs_timeout_user),
2652 [CMDID(IP_VS_SO_GET_DAEMON)] = 2 * sizeof(struct ip_vs_daemon_user),
2653 };
2654
2655 union ip_vs_get_arglen {
2656 char field_IP_VS_SO_GET_VERSION[64];
2657 struct ip_vs_getinfo field_IP_VS_SO_GET_INFO;
2658 struct ip_vs_get_services field_IP_VS_SO_GET_SERVICES;
2659 struct ip_vs_service_entry field_IP_VS_SO_GET_SERVICE;
2660 struct ip_vs_get_dests field_IP_VS_SO_GET_DESTS;
2661 struct ip_vs_timeout_user field_IP_VS_SO_GET_TIMEOUT;
2662 struct ip_vs_daemon_user field_IP_VS_SO_GET_DAEMON[2];
2663 };
2664
2665 #define MAX_GET_ARGLEN sizeof(union ip_vs_get_arglen)
2666
2667 static int
2668 do_ip_vs_get_ctl(struct sock *sk, int cmd, void __user *user, int *len)
2669 {
2670 unsigned char arg[MAX_GET_ARGLEN];
2671 int ret = 0;
2672 unsigned int copylen;
2673 struct net *net = sock_net(sk);
2674 struct netns_ipvs *ipvs = net_ipvs(net);
2675
2676 BUG_ON(!net);
2677 BUILD_BUG_ON(sizeof(arg) > 255);
2678 if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
2679 return -EPERM;
2680
2681 if (cmd < IP_VS_BASE_CTL || cmd > IP_VS_SO_GET_MAX)
2682 return -EINVAL;
2683
2684 copylen = get_arglen[CMDID(cmd)];
2685 if (*len < (int) copylen) {
2686 IP_VS_DBG(1, "get_ctl: len %d < %u\n", *len, copylen);
2687 return -EINVAL;
2688 }
2689
2690 if (copy_from_user(arg, user, copylen) != 0)
2691 return -EFAULT;
2692 /*
2693 * Handle daemons first since it has its own locking
2694 */
2695 if (cmd == IP_VS_SO_GET_DAEMON) {
2696 struct ip_vs_daemon_user d[2];
2697
2698 memset(&d, 0, sizeof(d));
2699 mutex_lock(&ipvs->sync_mutex);
2700 if (ipvs->sync_state & IP_VS_STATE_MASTER) {
2701 d[0].state = IP_VS_STATE_MASTER;
2702 strlcpy(d[0].mcast_ifn, ipvs->mcfg.mcast_ifn,
2703 sizeof(d[0].mcast_ifn));
2704 d[0].syncid = ipvs->mcfg.syncid;
2705 }
2706 if (ipvs->sync_state & IP_VS_STATE_BACKUP) {
2707 d[1].state = IP_VS_STATE_BACKUP;
2708 strlcpy(d[1].mcast_ifn, ipvs->bcfg.mcast_ifn,
2709 sizeof(d[1].mcast_ifn));
2710 d[1].syncid = ipvs->bcfg.syncid;
2711 }
2712 if (copy_to_user(user, &d, sizeof(d)) != 0)
2713 ret = -EFAULT;
2714 mutex_unlock(&ipvs->sync_mutex);
2715 return ret;
2716 }
2717
2718 mutex_lock(&__ip_vs_mutex);
2719 switch (cmd) {
2720 case IP_VS_SO_GET_VERSION:
2721 {
2722 char buf[64];
2723
2724 sprintf(buf, "IP Virtual Server version %d.%d.%d (size=%d)",
2725 NVERSION(IP_VS_VERSION_CODE), ip_vs_conn_tab_size);
2726 if (copy_to_user(user, buf, strlen(buf)+1) != 0) {
2727 ret = -EFAULT;
2728 goto out;
2729 }
2730 *len = strlen(buf)+1;
2731 }
2732 break;
2733
2734 case IP_VS_SO_GET_INFO:
2735 {
2736 struct ip_vs_getinfo info;
2737 info.version = IP_VS_VERSION_CODE;
2738 info.size = ip_vs_conn_tab_size;
2739 info.num_services = ipvs->num_services;
2740 if (copy_to_user(user, &info, sizeof(info)) != 0)
2741 ret = -EFAULT;
2742 }
2743 break;
2744
2745 case IP_VS_SO_GET_SERVICES:
2746 {
2747 struct ip_vs_get_services *get;
2748 int size;
2749
2750 get = (struct ip_vs_get_services *)arg;
2751 size = sizeof(*get) +
2752 sizeof(struct ip_vs_service_entry) * get->num_services;
2753 if (*len != size) {
2754 pr_err("length: %u != %u\n", *len, size);
2755 ret = -EINVAL;
2756 goto out;
2757 }
2758 ret = __ip_vs_get_service_entries(ipvs, get, user);
2759 }
2760 break;
2761
2762 case IP_VS_SO_GET_SERVICE:
2763 {
2764 struct ip_vs_service_entry *entry;
2765 struct ip_vs_service *svc;
2766 union nf_inet_addr addr;
2767
2768 entry = (struct ip_vs_service_entry *)arg;
2769 addr.ip = entry->addr;
2770 rcu_read_lock();
2771 if (entry->fwmark)
2772 svc = __ip_vs_svc_fwm_find(ipvs, AF_INET, entry->fwmark);
2773 else
2774 svc = __ip_vs_service_find(ipvs, AF_INET,
2775 entry->protocol, &addr,
2776 entry->port);
2777 rcu_read_unlock();
2778 if (svc) {
2779 ip_vs_copy_service(entry, svc);
2780 if (copy_to_user(user, entry, sizeof(*entry)) != 0)
2781 ret = -EFAULT;
2782 } else
2783 ret = -ESRCH;
2784 }
2785 break;
2786
2787 case IP_VS_SO_GET_DESTS:
2788 {
2789 struct ip_vs_get_dests *get;
2790 int size;
2791
2792 get = (struct ip_vs_get_dests *)arg;
2793 size = sizeof(*get) +
2794 sizeof(struct ip_vs_dest_entry) * get->num_dests;
2795 if (*len != size) {
2796 pr_err("length: %u != %u\n", *len, size);
2797 ret = -EINVAL;
2798 goto out;
2799 }
2800 ret = __ip_vs_get_dest_entries(ipvs, get, user);
2801 }
2802 break;
2803
2804 case IP_VS_SO_GET_TIMEOUT:
2805 {
2806 struct ip_vs_timeout_user t;
2807
2808 __ip_vs_get_timeouts(ipvs, &t);
2809 if (copy_to_user(user, &t, sizeof(t)) != 0)
2810 ret = -EFAULT;
2811 }
2812 break;
2813
2814 default:
2815 ret = -EINVAL;
2816 }
2817
2818 out:
2819 mutex_unlock(&__ip_vs_mutex);
2820 return ret;
2821 }
2822
2823
2824 static struct nf_sockopt_ops ip_vs_sockopts = {
2825 .pf = PF_INET,
2826 .set_optmin = IP_VS_BASE_CTL,
2827 .set_optmax = IP_VS_SO_SET_MAX+1,
2828 .set = do_ip_vs_set_ctl,
2829 .get_optmin = IP_VS_BASE_CTL,
2830 .get_optmax = IP_VS_SO_GET_MAX+1,
2831 .get = do_ip_vs_get_ctl,
2832 .owner = THIS_MODULE,
2833 };
2834
2835 /*
2836 * Generic Netlink interface
2837 */
2838
2839 /* IPVS genetlink family */
2840 static struct genl_family ip_vs_genl_family;
2841
2842 /* Policy used for first-level command attributes */
2843 static const struct nla_policy ip_vs_cmd_policy[IPVS_CMD_ATTR_MAX + 1] = {
2844 [IPVS_CMD_ATTR_SERVICE] = { .type = NLA_NESTED },
2845 [IPVS_CMD_ATTR_DEST] = { .type = NLA_NESTED },
2846 [IPVS_CMD_ATTR_DAEMON] = { .type = NLA_NESTED },
2847 [IPVS_CMD_ATTR_TIMEOUT_TCP] = { .type = NLA_U32 },
2848 [IPVS_CMD_ATTR_TIMEOUT_TCP_FIN] = { .type = NLA_U32 },
2849 [IPVS_CMD_ATTR_TIMEOUT_UDP] = { .type = NLA_U32 },
2850 };
2851
2852 /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DAEMON */
2853 static const struct nla_policy ip_vs_daemon_policy[IPVS_DAEMON_ATTR_MAX + 1] = {
2854 [IPVS_DAEMON_ATTR_STATE] = { .type = NLA_U32 },
2855 [IPVS_DAEMON_ATTR_MCAST_IFN] = { .type = NLA_NUL_STRING,
2856 .len = IP_VS_IFNAME_MAXLEN },
2857 [IPVS_DAEMON_ATTR_SYNC_ID] = { .type = NLA_U32 },
2858 [IPVS_DAEMON_ATTR_SYNC_MAXLEN] = { .type = NLA_U16 },
2859 [IPVS_DAEMON_ATTR_MCAST_GROUP] = { .type = NLA_U32 },
2860 [IPVS_DAEMON_ATTR_MCAST_GROUP6] = { .len = sizeof(struct in6_addr) },
2861 [IPVS_DAEMON_ATTR_MCAST_PORT] = { .type = NLA_U16 },
2862 [IPVS_DAEMON_ATTR_MCAST_TTL] = { .type = NLA_U8 },
2863 };
2864
2865 /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_SERVICE */
2866 static const struct nla_policy ip_vs_svc_policy[IPVS_SVC_ATTR_MAX + 1] = {
2867 [IPVS_SVC_ATTR_AF] = { .type = NLA_U16 },
2868 [IPVS_SVC_ATTR_PROTOCOL] = { .type = NLA_U16 },
2869 [IPVS_SVC_ATTR_ADDR] = { .type = NLA_BINARY,
2870 .len = sizeof(union nf_inet_addr) },
2871 [IPVS_SVC_ATTR_PORT] = { .type = NLA_U16 },
2872 [IPVS_SVC_ATTR_FWMARK] = { .type = NLA_U32 },
2873 [IPVS_SVC_ATTR_SCHED_NAME] = { .type = NLA_NUL_STRING,
2874 .len = IP_VS_SCHEDNAME_MAXLEN },
2875 [IPVS_SVC_ATTR_PE_NAME] = { .type = NLA_NUL_STRING,
2876 .len = IP_VS_PENAME_MAXLEN },
2877 [IPVS_SVC_ATTR_FLAGS] = { .type = NLA_BINARY,
2878 .len = sizeof(struct ip_vs_flags) },
2879 [IPVS_SVC_ATTR_TIMEOUT] = { .type = NLA_U32 },
2880 [IPVS_SVC_ATTR_NETMASK] = { .type = NLA_U32 },
2881 [IPVS_SVC_ATTR_STATS] = { .type = NLA_NESTED },
2882 };
2883
2884 /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DEST */
2885 static const struct nla_policy ip_vs_dest_policy[IPVS_DEST_ATTR_MAX + 1] = {
2886 [IPVS_DEST_ATTR_ADDR] = { .type = NLA_BINARY,
2887 .len = sizeof(union nf_inet_addr) },
2888 [IPVS_DEST_ATTR_PORT] = { .type = NLA_U16 },
2889 [IPVS_DEST_ATTR_FWD_METHOD] = { .type = NLA_U32 },
2890 [IPVS_DEST_ATTR_WEIGHT] = { .type = NLA_U32 },
2891 [IPVS_DEST_ATTR_U_THRESH] = { .type = NLA_U32 },
2892 [IPVS_DEST_ATTR_L_THRESH] = { .type = NLA_U32 },
2893 [IPVS_DEST_ATTR_ACTIVE_CONNS] = { .type = NLA_U32 },
2894 [IPVS_DEST_ATTR_INACT_CONNS] = { .type = NLA_U32 },
2895 [IPVS_DEST_ATTR_PERSIST_CONNS] = { .type = NLA_U32 },
2896 [IPVS_DEST_ATTR_STATS] = { .type = NLA_NESTED },
2897 [IPVS_DEST_ATTR_ADDR_FAMILY] = { .type = NLA_U16 },
2898 };
2899
2900 static int ip_vs_genl_fill_stats(struct sk_buff *skb, int container_type,
2901 struct ip_vs_kstats *kstats)
2902 {
2903 struct nlattr *nl_stats = nla_nest_start(skb, container_type);
2904
2905 if (!nl_stats)
2906 return -EMSGSIZE;
2907
2908 if (nla_put_u32(skb, IPVS_STATS_ATTR_CONNS, (u32)kstats->conns) ||
2909 nla_put_u32(skb, IPVS_STATS_ATTR_INPKTS, (u32)kstats->inpkts) ||
2910 nla_put_u32(skb, IPVS_STATS_ATTR_OUTPKTS, (u32)kstats->outpkts) ||
2911 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_INBYTES, kstats->inbytes,
2912 IPVS_STATS_ATTR_PAD) ||
2913 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_OUTBYTES, kstats->outbytes,
2914 IPVS_STATS_ATTR_PAD) ||
2915 nla_put_u32(skb, IPVS_STATS_ATTR_CPS, (u32)kstats->cps) ||
2916 nla_put_u32(skb, IPVS_STATS_ATTR_INPPS, (u32)kstats->inpps) ||
2917 nla_put_u32(skb, IPVS_STATS_ATTR_OUTPPS, (u32)kstats->outpps) ||
2918 nla_put_u32(skb, IPVS_STATS_ATTR_INBPS, (u32)kstats->inbps) ||
2919 nla_put_u32(skb, IPVS_STATS_ATTR_OUTBPS, (u32)kstats->outbps))
2920 goto nla_put_failure;
2921 nla_nest_end(skb, nl_stats);
2922
2923 return 0;
2924
2925 nla_put_failure:
2926 nla_nest_cancel(skb, nl_stats);
2927 return -EMSGSIZE;
2928 }
2929
2930 static int ip_vs_genl_fill_stats64(struct sk_buff *skb, int container_type,
2931 struct ip_vs_kstats *kstats)
2932 {
2933 struct nlattr *nl_stats = nla_nest_start(skb, container_type);
2934
2935 if (!nl_stats)
2936 return -EMSGSIZE;
2937
2938 if (nla_put_u64_64bit(skb, IPVS_STATS_ATTR_CONNS, kstats->conns,
2939 IPVS_STATS_ATTR_PAD) ||
2940 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_INPKTS, kstats->inpkts,
2941 IPVS_STATS_ATTR_PAD) ||
2942 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_OUTPKTS, kstats->outpkts,
2943 IPVS_STATS_ATTR_PAD) ||
2944 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_INBYTES, kstats->inbytes,
2945 IPVS_STATS_ATTR_PAD) ||
2946 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_OUTBYTES, kstats->outbytes,
2947 IPVS_STATS_ATTR_PAD) ||
2948 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_CPS, kstats->cps,
2949 IPVS_STATS_ATTR_PAD) ||
2950 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_INPPS, kstats->inpps,
2951 IPVS_STATS_ATTR_PAD) ||
2952 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_OUTPPS, kstats->outpps,
2953 IPVS_STATS_ATTR_PAD) ||
2954 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_INBPS, kstats->inbps,
2955 IPVS_STATS_ATTR_PAD) ||
2956 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_OUTBPS, kstats->outbps,
2957 IPVS_STATS_ATTR_PAD))
2958 goto nla_put_failure;
2959 nla_nest_end(skb, nl_stats);
2960
2961 return 0;
2962
2963 nla_put_failure:
2964 nla_nest_cancel(skb, nl_stats);
2965 return -EMSGSIZE;
2966 }
2967
2968 static int ip_vs_genl_fill_service(struct sk_buff *skb,
2969 struct ip_vs_service *svc)
2970 {
2971 struct ip_vs_scheduler *sched;
2972 struct ip_vs_pe *pe;
2973 struct nlattr *nl_service;
2974 struct ip_vs_flags flags = { .flags = svc->flags,
2975 .mask = ~0 };
2976 struct ip_vs_kstats kstats;
2977 char *sched_name;
2978
2979 nl_service = nla_nest_start(skb, IPVS_CMD_ATTR_SERVICE);
2980 if (!nl_service)
2981 return -EMSGSIZE;
2982
2983 if (nla_put_u16(skb, IPVS_SVC_ATTR_AF, svc->af))
2984 goto nla_put_failure;
2985 if (svc->fwmark) {
2986 if (nla_put_u32(skb, IPVS_SVC_ATTR_FWMARK, svc->fwmark))
2987 goto nla_put_failure;
2988 } else {
2989 if (nla_put_u16(skb, IPVS_SVC_ATTR_PROTOCOL, svc->protocol) ||
2990 nla_put(skb, IPVS_SVC_ATTR_ADDR, sizeof(svc->addr), &svc->addr) ||
2991 nla_put_be16(skb, IPVS_SVC_ATTR_PORT, svc->port))
2992 goto nla_put_failure;
2993 }
2994
2995 sched = rcu_dereference_protected(svc->scheduler, 1);
2996 sched_name = sched ? sched->name : "none";
2997 pe = rcu_dereference_protected(svc->pe, 1);
2998 if (nla_put_string(skb, IPVS_SVC_ATTR_SCHED_NAME, sched_name) ||
2999 (pe && nla_put_string(skb, IPVS_SVC_ATTR_PE_NAME, pe->name)) ||
3000 nla_put(skb, IPVS_SVC_ATTR_FLAGS, sizeof(flags), &flags) ||
3001 nla_put_u32(skb, IPVS_SVC_ATTR_TIMEOUT, svc->timeout / HZ) ||
3002 nla_put_be32(skb, IPVS_SVC_ATTR_NETMASK, svc->netmask))
3003 goto nla_put_failure;
3004 ip_vs_copy_stats(&kstats, &svc->stats);
3005 if (ip_vs_genl_fill_stats(skb, IPVS_SVC_ATTR_STATS, &kstats))
3006 goto nla_put_failure;
3007 if (ip_vs_genl_fill_stats64(skb, IPVS_SVC_ATTR_STATS64, &kstats))
3008 goto nla_put_failure;
3009
3010 nla_nest_end(skb, nl_service);
3011
3012 return 0;
3013
3014 nla_put_failure:
3015 nla_nest_cancel(skb, nl_service);
3016 return -EMSGSIZE;
3017 }
3018
3019 static int ip_vs_genl_dump_service(struct sk_buff *skb,
3020 struct ip_vs_service *svc,
3021 struct netlink_callback *cb)
3022 {
3023 void *hdr;
3024
3025 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3026 &ip_vs_genl_family, NLM_F_MULTI,
3027 IPVS_CMD_NEW_SERVICE);
3028 if (!hdr)
3029 return -EMSGSIZE;
3030
3031 if (ip_vs_genl_fill_service(skb, svc) < 0)
3032 goto nla_put_failure;
3033
3034 genlmsg_end(skb, hdr);
3035 return 0;
3036
3037 nla_put_failure:
3038 genlmsg_cancel(skb, hdr);
3039 return -EMSGSIZE;
3040 }
3041
3042 static int ip_vs_genl_dump_services(struct sk_buff *skb,
3043 struct netlink_callback *cb)
3044 {
3045 int idx = 0, i;
3046 int start = cb->args[0];
3047 struct ip_vs_service *svc;
3048 struct net *net = sock_net(skb->sk);
3049 struct netns_ipvs *ipvs = net_ipvs(net);
3050
3051 mutex_lock(&__ip_vs_mutex);
3052 for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) {
3053 hlist_for_each_entry(svc, &ip_vs_svc_table[i], s_list) {
3054 if (++idx <= start || (svc->ipvs != ipvs))
3055 continue;
3056 if (ip_vs_genl_dump_service(skb, svc, cb) < 0) {
3057 idx--;
3058 goto nla_put_failure;
3059 }
3060 }
3061 }
3062
3063 for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) {
3064 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[i], f_list) {
3065 if (++idx <= start || (svc->ipvs != ipvs))
3066 continue;
3067 if (ip_vs_genl_dump_service(skb, svc, cb) < 0) {
3068 idx--;
3069 goto nla_put_failure;
3070 }
3071 }
3072 }
3073
3074 nla_put_failure:
3075 mutex_unlock(&__ip_vs_mutex);
3076 cb->args[0] = idx;
3077
3078 return skb->len;
3079 }
3080
3081 static bool ip_vs_is_af_valid(int af)
3082 {
3083 if (af == AF_INET)
3084 return true;
3085 #ifdef CONFIG_IP_VS_IPV6
3086 if (af == AF_INET6 && ipv6_mod_enabled())
3087 return true;
3088 #endif
3089 return false;
3090 }
3091
3092 static int ip_vs_genl_parse_service(struct netns_ipvs *ipvs,
3093 struct ip_vs_service_user_kern *usvc,
3094 struct nlattr *nla, int full_entry,
3095 struct ip_vs_service **ret_svc)
3096 {
3097 struct nlattr *attrs[IPVS_SVC_ATTR_MAX + 1];
3098 struct nlattr *nla_af, *nla_port, *nla_fwmark, *nla_protocol, *nla_addr;
3099 struct ip_vs_service *svc;
3100
3101 /* Parse mandatory identifying service fields first */
3102 if (nla == NULL ||
3103 nla_parse_nested(attrs, IPVS_SVC_ATTR_MAX, nla,
3104 ip_vs_svc_policy, NULL))
3105 return -EINVAL;
3106
3107 nla_af = attrs[IPVS_SVC_ATTR_AF];
3108 nla_protocol = attrs[IPVS_SVC_ATTR_PROTOCOL];
3109 nla_addr = attrs[IPVS_SVC_ATTR_ADDR];
3110 nla_port = attrs[IPVS_SVC_ATTR_PORT];
3111 nla_fwmark = attrs[IPVS_SVC_ATTR_FWMARK];
3112
3113 if (!(nla_af && (nla_fwmark || (nla_port && nla_protocol && nla_addr))))
3114 return -EINVAL;
3115
3116 memset(usvc, 0, sizeof(*usvc));
3117
3118 usvc->af = nla_get_u16(nla_af);
3119 if (!ip_vs_is_af_valid(usvc->af))
3120 return -EAFNOSUPPORT;
3121
3122 if (nla_fwmark) {
3123 usvc->protocol = IPPROTO_TCP;
3124 usvc->fwmark = nla_get_u32(nla_fwmark);
3125 } else {
3126 usvc->protocol = nla_get_u16(nla_protocol);
3127 nla_memcpy(&usvc->addr, nla_addr, sizeof(usvc->addr));
3128 usvc->port = nla_get_be16(nla_port);
3129 usvc->fwmark = 0;
3130 }
3131
3132 rcu_read_lock();
3133 if (usvc->fwmark)
3134 svc = __ip_vs_svc_fwm_find(ipvs, usvc->af, usvc->fwmark);
3135 else
3136 svc = __ip_vs_service_find(ipvs, usvc->af, usvc->protocol,
3137 &usvc->addr, usvc->port);
3138 rcu_read_unlock();
3139 *ret_svc = svc;
3140
3141 /* If a full entry was requested, check for the additional fields */
3142 if (full_entry) {
3143 struct nlattr *nla_sched, *nla_flags, *nla_pe, *nla_timeout,
3144 *nla_netmask;
3145 struct ip_vs_flags flags;
3146
3147 nla_sched = attrs[IPVS_SVC_ATTR_SCHED_NAME];
3148 nla_pe = attrs[IPVS_SVC_ATTR_PE_NAME];
3149 nla_flags = attrs[IPVS_SVC_ATTR_FLAGS];
3150 nla_timeout = attrs[IPVS_SVC_ATTR_TIMEOUT];
3151 nla_netmask = attrs[IPVS_SVC_ATTR_NETMASK];
3152
3153 if (!(nla_sched && nla_flags && nla_timeout && nla_netmask))
3154 return -EINVAL;
3155
3156 nla_memcpy(&flags, nla_flags, sizeof(flags));
3157
3158 /* prefill flags from service if it already exists */
3159 if (svc)
3160 usvc->flags = svc->flags;
3161
3162 /* set new flags from userland */
3163 usvc->flags = (usvc->flags & ~flags.mask) |
3164 (flags.flags & flags.mask);
3165 usvc->sched_name = nla_data(nla_sched);
3166 usvc->pe_name = nla_pe ? nla_data(nla_pe) : NULL;
3167 usvc->timeout = nla_get_u32(nla_timeout);
3168 usvc->netmask = nla_get_be32(nla_netmask);
3169 }
3170
3171 return 0;
3172 }
3173
3174 static struct ip_vs_service *ip_vs_genl_find_service(struct netns_ipvs *ipvs,
3175 struct nlattr *nla)
3176 {
3177 struct ip_vs_service_user_kern usvc;
3178 struct ip_vs_service *svc;
3179 int ret;
3180
3181 ret = ip_vs_genl_parse_service(ipvs, &usvc, nla, 0, &svc);
3182 return ret ? ERR_PTR(ret) : svc;
3183 }
3184
3185 static int ip_vs_genl_fill_dest(struct sk_buff *skb, struct ip_vs_dest *dest)
3186 {
3187 struct nlattr *nl_dest;
3188 struct ip_vs_kstats kstats;
3189
3190 nl_dest = nla_nest_start(skb, IPVS_CMD_ATTR_DEST);
3191 if (!nl_dest)
3192 return -EMSGSIZE;
3193
3194 if (nla_put(skb, IPVS_DEST_ATTR_ADDR, sizeof(dest->addr), &dest->addr) ||
3195 nla_put_be16(skb, IPVS_DEST_ATTR_PORT, dest->port) ||
3196 nla_put_u32(skb, IPVS_DEST_ATTR_FWD_METHOD,
3197 (atomic_read(&dest->conn_flags) &
3198 IP_VS_CONN_F_FWD_MASK)) ||
3199 nla_put_u32(skb, IPVS_DEST_ATTR_WEIGHT,
3200 atomic_read(&dest->weight)) ||
3201 nla_put_u32(skb, IPVS_DEST_ATTR_U_THRESH, dest->u_threshold) ||
3202 nla_put_u32(skb, IPVS_DEST_ATTR_L_THRESH, dest->l_threshold) ||
3203 nla_put_u32(skb, IPVS_DEST_ATTR_ACTIVE_CONNS,
3204 atomic_read(&dest->activeconns)) ||
3205 nla_put_u32(skb, IPVS_DEST_ATTR_INACT_CONNS,
3206 atomic_read(&dest->inactconns)) ||
3207 nla_put_u32(skb, IPVS_DEST_ATTR_PERSIST_CONNS,
3208 atomic_read(&dest->persistconns)) ||
3209 nla_put_u16(skb, IPVS_DEST_ATTR_ADDR_FAMILY, dest->af))
3210 goto nla_put_failure;
3211 ip_vs_copy_stats(&kstats, &dest->stats);
3212 if (ip_vs_genl_fill_stats(skb, IPVS_DEST_ATTR_STATS, &kstats))
3213 goto nla_put_failure;
3214 if (ip_vs_genl_fill_stats64(skb, IPVS_DEST_ATTR_STATS64, &kstats))
3215 goto nla_put_failure;
3216
3217 nla_nest_end(skb, nl_dest);
3218
3219 return 0;
3220
3221 nla_put_failure:
3222 nla_nest_cancel(skb, nl_dest);
3223 return -EMSGSIZE;
3224 }
3225
3226 static int ip_vs_genl_dump_dest(struct sk_buff *skb, struct ip_vs_dest *dest,
3227 struct netlink_callback *cb)
3228 {
3229 void *hdr;
3230
3231 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3232 &ip_vs_genl_family, NLM_F_MULTI,
3233 IPVS_CMD_NEW_DEST);
3234 if (!hdr)
3235 return -EMSGSIZE;
3236
3237 if (ip_vs_genl_fill_dest(skb, dest) < 0)
3238 goto nla_put_failure;
3239
3240 genlmsg_end(skb, hdr);
3241 return 0;
3242
3243 nla_put_failure:
3244 genlmsg_cancel(skb, hdr);
3245 return -EMSGSIZE;
3246 }
3247
3248 static int ip_vs_genl_dump_dests(struct sk_buff *skb,
3249 struct netlink_callback *cb)
3250 {
3251 int idx = 0;
3252 int start = cb->args[0];
3253 struct ip_vs_service *svc;
3254 struct ip_vs_dest *dest;
3255 struct nlattr *attrs[IPVS_CMD_ATTR_MAX + 1];
3256 struct net *net = sock_net(skb->sk);
3257 struct netns_ipvs *ipvs = net_ipvs(net);
3258
3259 mutex_lock(&__ip_vs_mutex);
3260
3261 /* Try to find the service for which to dump destinations */
3262 if (nlmsg_parse(cb->nlh, GENL_HDRLEN, attrs, IPVS_CMD_ATTR_MAX,
3263 ip_vs_cmd_policy, NULL))
3264 goto out_err;
3265
3266
3267 svc = ip_vs_genl_find_service(ipvs, attrs[IPVS_CMD_ATTR_SERVICE]);
3268 if (IS_ERR_OR_NULL(svc))
3269 goto out_err;
3270
3271 /* Dump the destinations */
3272 list_for_each_entry(dest, &svc->destinations, n_list) {
3273 if (++idx <= start)
3274 continue;
3275 if (ip_vs_genl_dump_dest(skb, dest, cb) < 0) {
3276 idx--;
3277 goto nla_put_failure;
3278 }
3279 }
3280
3281 nla_put_failure:
3282 cb->args[0] = idx;
3283
3284 out_err:
3285 mutex_unlock(&__ip_vs_mutex);
3286
3287 return skb->len;
3288 }
3289
3290 static int ip_vs_genl_parse_dest(struct ip_vs_dest_user_kern *udest,
3291 struct nlattr *nla, int full_entry)
3292 {
3293 struct nlattr *attrs[IPVS_DEST_ATTR_MAX + 1];
3294 struct nlattr *nla_addr, *nla_port;
3295 struct nlattr *nla_addr_family;
3296
3297 /* Parse mandatory identifying destination fields first */
3298 if (nla == NULL ||
3299 nla_parse_nested(attrs, IPVS_DEST_ATTR_MAX, nla,
3300 ip_vs_dest_policy, NULL))
3301 return -EINVAL;
3302
3303 nla_addr = attrs[IPVS_DEST_ATTR_ADDR];
3304 nla_port = attrs[IPVS_DEST_ATTR_PORT];
3305 nla_addr_family = attrs[IPVS_DEST_ATTR_ADDR_FAMILY];
3306
3307 if (!(nla_addr && nla_port))
3308 return -EINVAL;
3309
3310 memset(udest, 0, sizeof(*udest));
3311
3312 nla_memcpy(&udest->addr, nla_addr, sizeof(udest->addr));
3313 udest->port = nla_get_be16(nla_port);
3314
3315 if (nla_addr_family)
3316 udest->af = nla_get_u16(nla_addr_family);
3317 else
3318 udest->af = 0;
3319
3320 /* If a full entry was requested, check for the additional fields */
3321 if (full_entry) {
3322 struct nlattr *nla_fwd, *nla_weight, *nla_u_thresh,
3323 *nla_l_thresh;
3324
3325 nla_fwd = attrs[IPVS_DEST_ATTR_FWD_METHOD];
3326 nla_weight = attrs[IPVS_DEST_ATTR_WEIGHT];
3327 nla_u_thresh = attrs[IPVS_DEST_ATTR_U_THRESH];
3328 nla_l_thresh = attrs[IPVS_DEST_ATTR_L_THRESH];
3329
3330 if (!(nla_fwd && nla_weight && nla_u_thresh && nla_l_thresh))
3331 return -EINVAL;
3332
3333 udest->conn_flags = nla_get_u32(nla_fwd)
3334 & IP_VS_CONN_F_FWD_MASK;
3335 udest->weight = nla_get_u32(nla_weight);
3336 udest->u_threshold = nla_get_u32(nla_u_thresh);
3337 udest->l_threshold = nla_get_u32(nla_l_thresh);
3338 }
3339
3340 return 0;
3341 }
3342
3343 static int ip_vs_genl_fill_daemon(struct sk_buff *skb, __u32 state,
3344 struct ipvs_sync_daemon_cfg *c)
3345 {
3346 struct nlattr *nl_daemon;
3347
3348 nl_daemon = nla_nest_start(skb, IPVS_CMD_ATTR_DAEMON);
3349 if (!nl_daemon)
3350 return -EMSGSIZE;
3351
3352 if (nla_put_u32(skb, IPVS_DAEMON_ATTR_STATE, state) ||
3353 nla_put_string(skb, IPVS_DAEMON_ATTR_MCAST_IFN, c->mcast_ifn) ||
3354 nla_put_u32(skb, IPVS_DAEMON_ATTR_SYNC_ID, c->syncid) ||
3355 nla_put_u16(skb, IPVS_DAEMON_ATTR_SYNC_MAXLEN, c->sync_maxlen) ||
3356 nla_put_u16(skb, IPVS_DAEMON_ATTR_MCAST_PORT, c->mcast_port) ||
3357 nla_put_u8(skb, IPVS_DAEMON_ATTR_MCAST_TTL, c->mcast_ttl))
3358 goto nla_put_failure;
3359 #ifdef CONFIG_IP_VS_IPV6
3360 if (c->mcast_af == AF_INET6) {
3361 if (nla_put_in6_addr(skb, IPVS_DAEMON_ATTR_MCAST_GROUP6,
3362 &c->mcast_group.in6))
3363 goto nla_put_failure;
3364 } else
3365 #endif
3366 if (c->mcast_af == AF_INET &&
3367 nla_put_in_addr(skb, IPVS_DAEMON_ATTR_MCAST_GROUP,
3368 c->mcast_group.ip))
3369 goto nla_put_failure;
3370 nla_nest_end(skb, nl_daemon);
3371
3372 return 0;
3373
3374 nla_put_failure:
3375 nla_nest_cancel(skb, nl_daemon);
3376 return -EMSGSIZE;
3377 }
3378
3379 static int ip_vs_genl_dump_daemon(struct sk_buff *skb, __u32 state,
3380 struct ipvs_sync_daemon_cfg *c,
3381 struct netlink_callback *cb)
3382 {
3383 void *hdr;
3384 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3385 &ip_vs_genl_family, NLM_F_MULTI,
3386 IPVS_CMD_NEW_DAEMON);
3387 if (!hdr)
3388 return -EMSGSIZE;
3389
3390 if (ip_vs_genl_fill_daemon(skb, state, c))
3391 goto nla_put_failure;
3392
3393 genlmsg_end(skb, hdr);
3394 return 0;
3395
3396 nla_put_failure:
3397 genlmsg_cancel(skb, hdr);
3398 return -EMSGSIZE;
3399 }
3400
3401 static int ip_vs_genl_dump_daemons(struct sk_buff *skb,
3402 struct netlink_callback *cb)
3403 {
3404 struct net *net = sock_net(skb->sk);
3405 struct netns_ipvs *ipvs = net_ipvs(net);
3406
3407 mutex_lock(&ipvs->sync_mutex);
3408 if ((ipvs->sync_state & IP_VS_STATE_MASTER) && !cb->args[0]) {
3409 if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_MASTER,
3410 &ipvs->mcfg, cb) < 0)
3411 goto nla_put_failure;
3412
3413 cb->args[0] = 1;
3414 }
3415
3416 if ((ipvs->sync_state & IP_VS_STATE_BACKUP) && !cb->args[1]) {
3417 if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_BACKUP,
3418 &ipvs->bcfg, cb) < 0)
3419 goto nla_put_failure;
3420
3421 cb->args[1] = 1;
3422 }
3423
3424 nla_put_failure:
3425 mutex_unlock(&ipvs->sync_mutex);
3426
3427 return skb->len;
3428 }
3429
3430 static int ip_vs_genl_new_daemon(struct netns_ipvs *ipvs, struct nlattr **attrs)
3431 {
3432 struct ipvs_sync_daemon_cfg c;
3433 struct nlattr *a;
3434 int ret;
3435
3436 memset(&c, 0, sizeof(c));
3437 if (!(attrs[IPVS_DAEMON_ATTR_STATE] &&
3438 attrs[IPVS_DAEMON_ATTR_MCAST_IFN] &&
3439 attrs[IPVS_DAEMON_ATTR_SYNC_ID]))
3440 return -EINVAL;
3441 strlcpy(c.mcast_ifn, nla_data(attrs[IPVS_DAEMON_ATTR_MCAST_IFN]),
3442 sizeof(c.mcast_ifn));
3443 c.syncid = nla_get_u32(attrs[IPVS_DAEMON_ATTR_SYNC_ID]);
3444
3445 a = attrs[IPVS_DAEMON_ATTR_SYNC_MAXLEN];
3446 if (a)
3447 c.sync_maxlen = nla_get_u16(a);
3448
3449 a = attrs[IPVS_DAEMON_ATTR_MCAST_GROUP];
3450 if (a) {
3451 c.mcast_af = AF_INET;
3452 c.mcast_group.ip = nla_get_in_addr(a);
3453 if (!ipv4_is_multicast(c.mcast_group.ip))
3454 return -EINVAL;
3455 } else {
3456 a = attrs[IPVS_DAEMON_ATTR_MCAST_GROUP6];
3457 if (a) {
3458 #ifdef CONFIG_IP_VS_IPV6
3459 int addr_type;
3460
3461 c.mcast_af = AF_INET6;
3462 c.mcast_group.in6 = nla_get_in6_addr(a);
3463 addr_type = ipv6_addr_type(&c.mcast_group.in6);
3464 if (!(addr_type & IPV6_ADDR_MULTICAST))
3465 return -EINVAL;
3466 #else
3467 return -EAFNOSUPPORT;
3468 #endif
3469 }
3470 }
3471
3472 a = attrs[IPVS_DAEMON_ATTR_MCAST_PORT];
3473 if (a)
3474 c.mcast_port = nla_get_u16(a);
3475
3476 a = attrs[IPVS_DAEMON_ATTR_MCAST_TTL];
3477 if (a)
3478 c.mcast_ttl = nla_get_u8(a);
3479
3480 /* The synchronization protocol is incompatible with mixed family
3481 * services
3482 */
3483 if (ipvs->mixed_address_family_dests > 0)
3484 return -EINVAL;
3485
3486 rtnl_lock();
3487 mutex_lock(&ipvs->sync_mutex);
3488 ret = start_sync_thread(ipvs, &c,
3489 nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]));
3490 mutex_unlock(&ipvs->sync_mutex);
3491 rtnl_unlock();
3492 return ret;
3493 }
3494
3495 static int ip_vs_genl_del_daemon(struct netns_ipvs *ipvs, struct nlattr **attrs)
3496 {
3497 int ret;
3498
3499 if (!attrs[IPVS_DAEMON_ATTR_STATE])
3500 return -EINVAL;
3501
3502 mutex_lock(&ipvs->sync_mutex);
3503 ret = stop_sync_thread(ipvs,
3504 nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]));
3505 mutex_unlock(&ipvs->sync_mutex);
3506 return ret;
3507 }
3508
3509 static int ip_vs_genl_set_config(struct netns_ipvs *ipvs, struct nlattr **attrs)
3510 {
3511 struct ip_vs_timeout_user t;
3512
3513 __ip_vs_get_timeouts(ipvs, &t);
3514
3515 if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP])
3516 t.tcp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP]);
3517
3518 if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN])
3519 t.tcp_fin_timeout =
3520 nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN]);
3521
3522 if (attrs[IPVS_CMD_ATTR_TIMEOUT_UDP])
3523 t.udp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_UDP]);
3524
3525 return ip_vs_set_timeout(ipvs, &t);
3526 }
3527
3528 static int ip_vs_genl_set_daemon(struct sk_buff *skb, struct genl_info *info)
3529 {
3530 int ret = -EINVAL, cmd;
3531 struct net *net = sock_net(skb->sk);
3532 struct netns_ipvs *ipvs = net_ipvs(net);
3533
3534 cmd = info->genlhdr->cmd;
3535
3536 if (cmd == IPVS_CMD_NEW_DAEMON || cmd == IPVS_CMD_DEL_DAEMON) {
3537 struct nlattr *daemon_attrs[IPVS_DAEMON_ATTR_MAX + 1];
3538
3539 if (!info->attrs[IPVS_CMD_ATTR_DAEMON] ||
3540 nla_parse_nested(daemon_attrs, IPVS_DAEMON_ATTR_MAX,
3541 info->attrs[IPVS_CMD_ATTR_DAEMON],
3542 ip_vs_daemon_policy, info->extack))
3543 goto out;
3544
3545 if (cmd == IPVS_CMD_NEW_DAEMON)
3546 ret = ip_vs_genl_new_daemon(ipvs, daemon_attrs);
3547 else
3548 ret = ip_vs_genl_del_daemon(ipvs, daemon_attrs);
3549 }
3550
3551 out:
3552 return ret;
3553 }
3554
3555 static int ip_vs_genl_set_cmd(struct sk_buff *skb, struct genl_info *info)
3556 {
3557 struct ip_vs_service *svc = NULL;
3558 struct ip_vs_service_user_kern usvc;
3559 struct ip_vs_dest_user_kern udest;
3560 int ret = 0, cmd;
3561 int need_full_svc = 0, need_full_dest = 0;
3562 struct net *net = sock_net(skb->sk);
3563 struct netns_ipvs *ipvs = net_ipvs(net);
3564
3565 cmd = info->genlhdr->cmd;
3566
3567 mutex_lock(&__ip_vs_mutex);
3568
3569 if (cmd == IPVS_CMD_FLUSH) {
3570 ret = ip_vs_flush(ipvs, false);
3571 goto out;
3572 } else if (cmd == IPVS_CMD_SET_CONFIG) {
3573 ret = ip_vs_genl_set_config(ipvs, info->attrs);
3574 goto out;
3575 } else if (cmd == IPVS_CMD_ZERO &&
3576 !info->attrs[IPVS_CMD_ATTR_SERVICE]) {
3577 ret = ip_vs_zero_all(ipvs);
3578 goto out;
3579 }
3580
3581 /* All following commands require a service argument, so check if we
3582 * received a valid one. We need a full service specification when
3583 * adding / editing a service. Only identifying members otherwise. */
3584 if (cmd == IPVS_CMD_NEW_SERVICE || cmd == IPVS_CMD_SET_SERVICE)
3585 need_full_svc = 1;
3586
3587 ret = ip_vs_genl_parse_service(ipvs, &usvc,
3588 info->attrs[IPVS_CMD_ATTR_SERVICE],
3589 need_full_svc, &svc);
3590 if (ret)
3591 goto out;
3592
3593 /* Unless we're adding a new service, the service must already exist */
3594 if ((cmd != IPVS_CMD_NEW_SERVICE) && (svc == NULL)) {
3595 ret = -ESRCH;
3596 goto out;
3597 }
3598
3599 /* Destination commands require a valid destination argument. For
3600 * adding / editing a destination, we need a full destination
3601 * specification. */
3602 if (cmd == IPVS_CMD_NEW_DEST || cmd == IPVS_CMD_SET_DEST ||
3603 cmd == IPVS_CMD_DEL_DEST) {
3604 if (cmd != IPVS_CMD_DEL_DEST)
3605 need_full_dest = 1;
3606
3607 ret = ip_vs_genl_parse_dest(&udest,
3608 info->attrs[IPVS_CMD_ATTR_DEST],
3609 need_full_dest);
3610 if (ret)
3611 goto out;
3612
3613 /* Old protocols did not allow the user to specify address
3614 * family, so we set it to zero instead. We also didn't
3615 * allow heterogeneous pools in the old code, so it's safe
3616 * to assume that this will have the same address family as
3617 * the service.
3618 */
3619 if (udest.af == 0)
3620 udest.af = svc->af;
3621
3622 if (!ip_vs_is_af_valid(udest.af)) {
3623 ret = -EAFNOSUPPORT;
3624 goto out;
3625 }
3626
3627 if (udest.af != svc->af && cmd != IPVS_CMD_DEL_DEST) {
3628 /* The synchronization protocol is incompatible
3629 * with mixed family services
3630 */
3631 if (ipvs->sync_state) {
3632 ret = -EINVAL;
3633 goto out;
3634 }
3635
3636 /* Which connection types do we support? */
3637 switch (udest.conn_flags) {
3638 case IP_VS_CONN_F_TUNNEL:
3639 /* We are able to forward this */
3640 break;
3641 default:
3642 ret = -EINVAL;
3643 goto out;
3644 }
3645 }
3646 }
3647
3648 switch (cmd) {
3649 case IPVS_CMD_NEW_SERVICE:
3650 if (svc == NULL)
3651 ret = ip_vs_add_service(ipvs, &usvc, &svc);
3652 else
3653 ret = -EEXIST;
3654 break;
3655 case IPVS_CMD_SET_SERVICE:
3656 ret = ip_vs_edit_service(svc, &usvc);
3657 break;
3658 case IPVS_CMD_DEL_SERVICE:
3659 ret = ip_vs_del_service(svc);
3660 /* do not use svc, it can be freed */
3661 break;
3662 case IPVS_CMD_NEW_DEST:
3663 ret = ip_vs_add_dest(svc, &udest);
3664 break;
3665 case IPVS_CMD_SET_DEST:
3666 ret = ip_vs_edit_dest(svc, &udest);
3667 break;
3668 case IPVS_CMD_DEL_DEST:
3669 ret = ip_vs_del_dest(svc, &udest);
3670 break;
3671 case IPVS_CMD_ZERO:
3672 ret = ip_vs_zero_service(svc);
3673 break;
3674 default:
3675 ret = -EINVAL;
3676 }
3677
3678 out:
3679 mutex_unlock(&__ip_vs_mutex);
3680
3681 return ret;
3682 }
3683
3684 static int ip_vs_genl_get_cmd(struct sk_buff *skb, struct genl_info *info)
3685 {
3686 struct sk_buff *msg;
3687 void *reply;
3688 int ret, cmd, reply_cmd;
3689 struct net *net = sock_net(skb->sk);
3690 struct netns_ipvs *ipvs = net_ipvs(net);
3691
3692 cmd = info->genlhdr->cmd;
3693
3694 if (cmd == IPVS_CMD_GET_SERVICE)
3695 reply_cmd = IPVS_CMD_NEW_SERVICE;
3696 else if (cmd == IPVS_CMD_GET_INFO)
3697 reply_cmd = IPVS_CMD_SET_INFO;
3698 else if (cmd == IPVS_CMD_GET_CONFIG)
3699 reply_cmd = IPVS_CMD_SET_CONFIG;
3700 else {
3701 pr_err("unknown Generic Netlink command\n");
3702 return -EINVAL;
3703 }
3704
3705 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3706 if (!msg)
3707 return -ENOMEM;
3708
3709 mutex_lock(&__ip_vs_mutex);
3710
3711 reply = genlmsg_put_reply(msg, info, &ip_vs_genl_family, 0, reply_cmd);
3712 if (reply == NULL)
3713 goto nla_put_failure;
3714
3715 switch (cmd) {
3716 case IPVS_CMD_GET_SERVICE:
3717 {
3718 struct ip_vs_service *svc;
3719
3720 svc = ip_vs_genl_find_service(ipvs,
3721 info->attrs[IPVS_CMD_ATTR_SERVICE]);
3722 if (IS_ERR(svc)) {
3723 ret = PTR_ERR(svc);
3724 goto out_err;
3725 } else if (svc) {
3726 ret = ip_vs_genl_fill_service(msg, svc);
3727 if (ret)
3728 goto nla_put_failure;
3729 } else {
3730 ret = -ESRCH;
3731 goto out_err;
3732 }
3733
3734 break;
3735 }
3736
3737 case IPVS_CMD_GET_CONFIG:
3738 {
3739 struct ip_vs_timeout_user t;
3740
3741 __ip_vs_get_timeouts(ipvs, &t);
3742 #ifdef CONFIG_IP_VS_PROTO_TCP
3743 if (nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP,
3744 t.tcp_timeout) ||
3745 nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP_FIN,
3746 t.tcp_fin_timeout))
3747 goto nla_put_failure;
3748 #endif
3749 #ifdef CONFIG_IP_VS_PROTO_UDP
3750 if (nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_UDP, t.udp_timeout))
3751 goto nla_put_failure;
3752 #endif
3753
3754 break;
3755 }
3756
3757 case IPVS_CMD_GET_INFO:
3758 if (nla_put_u32(msg, IPVS_INFO_ATTR_VERSION,
3759 IP_VS_VERSION_CODE) ||
3760 nla_put_u32(msg, IPVS_INFO_ATTR_CONN_TAB_SIZE,
3761 ip_vs_conn_tab_size))
3762 goto nla_put_failure;
3763 break;
3764 }
3765
3766 genlmsg_end(msg, reply);
3767 ret = genlmsg_reply(msg, info);
3768 goto out;
3769
3770 nla_put_failure:
3771 pr_err("not enough space in Netlink message\n");
3772 ret = -EMSGSIZE;
3773
3774 out_err:
3775 nlmsg_free(msg);
3776 out:
3777 mutex_unlock(&__ip_vs_mutex);
3778
3779 return ret;
3780 }
3781
3782
3783 static const struct genl_ops ip_vs_genl_ops[] = {
3784 {
3785 .cmd = IPVS_CMD_NEW_SERVICE,
3786 .flags = GENL_ADMIN_PERM,
3787 .policy = ip_vs_cmd_policy,
3788 .doit = ip_vs_genl_set_cmd,
3789 },
3790 {
3791 .cmd = IPVS_CMD_SET_SERVICE,
3792 .flags = GENL_ADMIN_PERM,
3793 .policy = ip_vs_cmd_policy,
3794 .doit = ip_vs_genl_set_cmd,
3795 },
3796 {
3797 .cmd = IPVS_CMD_DEL_SERVICE,
3798 .flags = GENL_ADMIN_PERM,
3799 .policy = ip_vs_cmd_policy,
3800 .doit = ip_vs_genl_set_cmd,
3801 },
3802 {
3803 .cmd = IPVS_CMD_GET_SERVICE,
3804 .flags = GENL_ADMIN_PERM,
3805 .doit = ip_vs_genl_get_cmd,
3806 .dumpit = ip_vs_genl_dump_services,
3807 .policy = ip_vs_cmd_policy,
3808 },
3809 {
3810 .cmd = IPVS_CMD_NEW_DEST,
3811 .flags = GENL_ADMIN_PERM,
3812 .policy = ip_vs_cmd_policy,
3813 .doit = ip_vs_genl_set_cmd,
3814 },
3815 {
3816 .cmd = IPVS_CMD_SET_DEST,
3817 .flags = GENL_ADMIN_PERM,
3818 .policy = ip_vs_cmd_policy,
3819 .doit = ip_vs_genl_set_cmd,
3820 },
3821 {
3822 .cmd = IPVS_CMD_DEL_DEST,
3823 .flags = GENL_ADMIN_PERM,
3824 .policy = ip_vs_cmd_policy,
3825 .doit = ip_vs_genl_set_cmd,
3826 },
3827 {
3828 .cmd = IPVS_CMD_GET_DEST,
3829 .flags = GENL_ADMIN_PERM,
3830 .policy = ip_vs_cmd_policy,
3831 .dumpit = ip_vs_genl_dump_dests,
3832 },
3833 {
3834 .cmd = IPVS_CMD_NEW_DAEMON,
3835 .flags = GENL_ADMIN_PERM,
3836 .policy = ip_vs_cmd_policy,
3837 .doit = ip_vs_genl_set_daemon,
3838 },
3839 {
3840 .cmd = IPVS_CMD_DEL_DAEMON,
3841 .flags = GENL_ADMIN_PERM,
3842 .policy = ip_vs_cmd_policy,
3843 .doit = ip_vs_genl_set_daemon,
3844 },
3845 {
3846 .cmd = IPVS_CMD_GET_DAEMON,
3847 .flags = GENL_ADMIN_PERM,
3848 .dumpit = ip_vs_genl_dump_daemons,
3849 },
3850 {
3851 .cmd = IPVS_CMD_SET_CONFIG,
3852 .flags = GENL_ADMIN_PERM,
3853 .policy = ip_vs_cmd_policy,
3854 .doit = ip_vs_genl_set_cmd,
3855 },
3856 {
3857 .cmd = IPVS_CMD_GET_CONFIG,
3858 .flags = GENL_ADMIN_PERM,
3859 .doit = ip_vs_genl_get_cmd,
3860 },
3861 {
3862 .cmd = IPVS_CMD_GET_INFO,
3863 .flags = GENL_ADMIN_PERM,
3864 .doit = ip_vs_genl_get_cmd,
3865 },
3866 {
3867 .cmd = IPVS_CMD_ZERO,
3868 .flags = GENL_ADMIN_PERM,
3869 .policy = ip_vs_cmd_policy,
3870 .doit = ip_vs_genl_set_cmd,
3871 },
3872 {
3873 .cmd = IPVS_CMD_FLUSH,
3874 .flags = GENL_ADMIN_PERM,
3875 .doit = ip_vs_genl_set_cmd,
3876 },
3877 };
3878
3879 static struct genl_family ip_vs_genl_family __ro_after_init = {
3880 .hdrsize = 0,
3881 .name = IPVS_GENL_NAME,
3882 .version = IPVS_GENL_VERSION,
3883 .maxattr = IPVS_CMD_ATTR_MAX,
3884 .netnsok = true, /* Make ipvsadm to work on netns */
3885 .module = THIS_MODULE,
3886 .ops = ip_vs_genl_ops,
3887 .n_ops = ARRAY_SIZE(ip_vs_genl_ops),
3888 };
3889
3890 static int __init ip_vs_genl_register(void)
3891 {
3892 return genl_register_family(&ip_vs_genl_family);
3893 }
3894
3895 static void ip_vs_genl_unregister(void)
3896 {
3897 genl_unregister_family(&ip_vs_genl_family);
3898 }
3899
3900 /* End of Generic Netlink interface definitions */
3901
3902 /*
3903 * per netns intit/exit func.
3904 */
3905 #ifdef CONFIG_SYSCTL
3906 static int __net_init ip_vs_control_net_init_sysctl(struct netns_ipvs *ipvs)
3907 {
3908 struct net *net = ipvs->net;
3909 int idx;
3910 struct ctl_table *tbl;
3911
3912 atomic_set(&ipvs->dropentry, 0);
3913 spin_lock_init(&ipvs->dropentry_lock);
3914 spin_lock_init(&ipvs->droppacket_lock);
3915 spin_lock_init(&ipvs->securetcp_lock);
3916
3917 if (!net_eq(net, &init_net)) {
3918 tbl = kmemdup(vs_vars, sizeof(vs_vars), GFP_KERNEL);
3919 if (tbl == NULL)
3920 return -ENOMEM;
3921
3922 /* Don't export sysctls to unprivileged users */
3923 if (net->user_ns != &init_user_ns)
3924 tbl[0].procname = NULL;
3925 } else
3926 tbl = vs_vars;
3927 /* Initialize sysctl defaults */
3928 for (idx = 0; idx < ARRAY_SIZE(vs_vars); idx++) {
3929 if (tbl[idx].proc_handler == proc_do_defense_mode)
3930 tbl[idx].extra2 = ipvs;
3931 }
3932 idx = 0;
3933 ipvs->sysctl_amemthresh = 1024;
3934 tbl[idx++].data = &ipvs->sysctl_amemthresh;
3935 ipvs->sysctl_am_droprate = 10;
3936 tbl[idx++].data = &ipvs->sysctl_am_droprate;
3937 tbl[idx++].data = &ipvs->sysctl_drop_entry;
3938 tbl[idx++].data = &ipvs->sysctl_drop_packet;
3939 #ifdef CONFIG_IP_VS_NFCT
3940 tbl[idx++].data = &ipvs->sysctl_conntrack;
3941 #endif
3942 tbl[idx++].data = &ipvs->sysctl_secure_tcp;
3943 ipvs->sysctl_snat_reroute = 1;
3944 tbl[idx++].data = &ipvs->sysctl_snat_reroute;
3945 ipvs->sysctl_sync_ver = 1;
3946 tbl[idx++].data = &ipvs->sysctl_sync_ver;
3947 ipvs->sysctl_sync_ports = 1;
3948 tbl[idx++].data = &ipvs->sysctl_sync_ports;
3949 tbl[idx++].data = &ipvs->sysctl_sync_persist_mode;
3950 ipvs->sysctl_sync_qlen_max = nr_free_buffer_pages() / 32;
3951 tbl[idx++].data = &ipvs->sysctl_sync_qlen_max;
3952 ipvs->sysctl_sync_sock_size = 0;
3953 tbl[idx++].data = &ipvs->sysctl_sync_sock_size;
3954 tbl[idx++].data = &ipvs->sysctl_cache_bypass;
3955 tbl[idx++].data = &ipvs->sysctl_expire_nodest_conn;
3956 tbl[idx++].data = &ipvs->sysctl_sloppy_tcp;
3957 tbl[idx++].data = &ipvs->sysctl_sloppy_sctp;
3958 tbl[idx++].data = &ipvs->sysctl_expire_quiescent_template;
3959 ipvs->sysctl_sync_threshold[0] = DEFAULT_SYNC_THRESHOLD;
3960 ipvs->sysctl_sync_threshold[1] = DEFAULT_SYNC_PERIOD;
3961 tbl[idx].data = &ipvs->sysctl_sync_threshold;
3962 tbl[idx++].maxlen = sizeof(ipvs->sysctl_sync_threshold);
3963 ipvs->sysctl_sync_refresh_period = DEFAULT_SYNC_REFRESH_PERIOD;
3964 tbl[idx++].data = &ipvs->sysctl_sync_refresh_period;
3965 ipvs->sysctl_sync_retries = clamp_t(int, DEFAULT_SYNC_RETRIES, 0, 3);
3966 tbl[idx++].data = &ipvs->sysctl_sync_retries;
3967 tbl[idx++].data = &ipvs->sysctl_nat_icmp_send;
3968 ipvs->sysctl_pmtu_disc = 1;
3969 tbl[idx++].data = &ipvs->sysctl_pmtu_disc;
3970 tbl[idx++].data = &ipvs->sysctl_backup_only;
3971 ipvs->sysctl_conn_reuse_mode = 1;
3972 tbl[idx++].data = &ipvs->sysctl_conn_reuse_mode;
3973 tbl[idx++].data = &ipvs->sysctl_schedule_icmp;
3974 tbl[idx++].data = &ipvs->sysctl_ignore_tunneled;
3975
3976 ipvs->sysctl_hdr = register_net_sysctl(net, "net/ipv4/vs", tbl);
3977 if (ipvs->sysctl_hdr == NULL) {
3978 if (!net_eq(net, &init_net))
3979 kfree(tbl);
3980 return -ENOMEM;
3981 }
3982 ip_vs_start_estimator(ipvs, &ipvs->tot_stats);
3983 ipvs->sysctl_tbl = tbl;
3984 /* Schedule defense work */
3985 INIT_DELAYED_WORK(&ipvs->defense_work, defense_work_handler);
3986 schedule_delayed_work(&ipvs->defense_work, DEFENSE_TIMER_PERIOD);
3987
3988 return 0;
3989 }
3990
3991 static void __net_exit ip_vs_control_net_cleanup_sysctl(struct netns_ipvs *ipvs)
3992 {
3993 struct net *net = ipvs->net;
3994
3995 cancel_delayed_work_sync(&ipvs->defense_work);
3996 cancel_work_sync(&ipvs->defense_work.work);
3997 unregister_net_sysctl_table(ipvs->sysctl_hdr);
3998 ip_vs_stop_estimator(ipvs, &ipvs->tot_stats);
3999
4000 if (!net_eq(net, &init_net))
4001 kfree(ipvs->sysctl_tbl);
4002 }
4003
4004 #else
4005
4006 static int __net_init ip_vs_control_net_init_sysctl(struct netns_ipvs *ipvs) { return 0; }
4007 static void __net_exit ip_vs_control_net_cleanup_sysctl(struct netns_ipvs *ipvs) { }
4008
4009 #endif
4010
4011 static struct notifier_block ip_vs_dst_notifier = {
4012 .notifier_call = ip_vs_dst_event,
4013 };
4014
4015 int __net_init ip_vs_control_net_init(struct netns_ipvs *ipvs)
4016 {
4017 int i, idx;
4018
4019 /* Initialize rs_table */
4020 for (idx = 0; idx < IP_VS_RTAB_SIZE; idx++)
4021 INIT_HLIST_HEAD(&ipvs->rs_table[idx]);
4022
4023 INIT_LIST_HEAD(&ipvs->dest_trash);
4024 spin_lock_init(&ipvs->dest_trash_lock);
4025 setup_timer(&ipvs->dest_trash_timer, ip_vs_dest_trash_expire,
4026 (unsigned long) ipvs);
4027 atomic_set(&ipvs->ftpsvc_counter, 0);
4028 atomic_set(&ipvs->nullsvc_counter, 0);
4029 atomic_set(&ipvs->conn_out_counter, 0);
4030
4031 /* procfs stats */
4032 ipvs->tot_stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
4033 if (!ipvs->tot_stats.cpustats)
4034 return -ENOMEM;
4035
4036 for_each_possible_cpu(i) {
4037 struct ip_vs_cpu_stats *ipvs_tot_stats;
4038 ipvs_tot_stats = per_cpu_ptr(ipvs->tot_stats.cpustats, i);
4039 u64_stats_init(&ipvs_tot_stats->syncp);
4040 }
4041
4042 spin_lock_init(&ipvs->tot_stats.lock);
4043
4044 proc_create("ip_vs", 0, ipvs->net->proc_net, &ip_vs_info_fops);
4045 proc_create("ip_vs_stats", 0, ipvs->net->proc_net, &ip_vs_stats_fops);
4046 proc_create("ip_vs_stats_percpu", 0, ipvs->net->proc_net,
4047 &ip_vs_stats_percpu_fops);
4048
4049 if (ip_vs_control_net_init_sysctl(ipvs))
4050 goto err;
4051
4052 return 0;
4053
4054 err:
4055 free_percpu(ipvs->tot_stats.cpustats);
4056 return -ENOMEM;
4057 }
4058
4059 void __net_exit ip_vs_control_net_cleanup(struct netns_ipvs *ipvs)
4060 {
4061 ip_vs_trash_cleanup(ipvs);
4062 ip_vs_control_net_cleanup_sysctl(ipvs);
4063 remove_proc_entry("ip_vs_stats_percpu", ipvs->net->proc_net);
4064 remove_proc_entry("ip_vs_stats", ipvs->net->proc_net);
4065 remove_proc_entry("ip_vs", ipvs->net->proc_net);
4066 free_percpu(ipvs->tot_stats.cpustats);
4067 }
4068
4069 int __init ip_vs_register_nl_ioctl(void)
4070 {
4071 int ret;
4072
4073 ret = nf_register_sockopt(&ip_vs_sockopts);
4074 if (ret) {
4075 pr_err("cannot register sockopt.\n");
4076 goto err_sock;
4077 }
4078
4079 ret = ip_vs_genl_register();
4080 if (ret) {
4081 pr_err("cannot register Generic Netlink interface.\n");
4082 goto err_genl;
4083 }
4084 return 0;
4085
4086 err_genl:
4087 nf_unregister_sockopt(&ip_vs_sockopts);
4088 err_sock:
4089 return ret;
4090 }
4091
4092 void ip_vs_unregister_nl_ioctl(void)
4093 {
4094 ip_vs_genl_unregister();
4095 nf_unregister_sockopt(&ip_vs_sockopts);
4096 }
4097
4098 int __init ip_vs_control_init(void)
4099 {
4100 int idx;
4101 int ret;
4102
4103 EnterFunction(2);
4104
4105 /* Initialize svc_table, ip_vs_svc_fwm_table */
4106 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
4107 INIT_HLIST_HEAD(&ip_vs_svc_table[idx]);
4108 INIT_HLIST_HEAD(&ip_vs_svc_fwm_table[idx]);
4109 }
4110
4111 smp_wmb(); /* Do we really need it now ? */
4112
4113 ret = register_netdevice_notifier(&ip_vs_dst_notifier);
4114 if (ret < 0)
4115 return ret;
4116
4117 LeaveFunction(2);
4118 return 0;
4119 }
4120
4121
4122 void ip_vs_control_cleanup(void)
4123 {
4124 EnterFunction(2);
4125 unregister_netdevice_notifier(&ip_vs_dst_notifier);
4126 LeaveFunction(2);
4127 }
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