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genetlink: make all genl_ops users const
[deliverable/linux.git] / net / netfilter / ipvs / ip_vs_ctl.c
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1/*
2 * IPVS An implementation of the IP virtual server support for the
3 * LINUX operating system. IPVS is now implemented as a module
4 * over the NetFilter framework. IPVS can be used to build a
5 * high-performance and highly available server based on a
6 * cluster of servers.
7 *
8 * Authors: Wensong Zhang <wensong@linuxvirtualserver.org>
9 * Peter Kese <peter.kese@ijs.si>
10 * Julian Anastasov <ja@ssi.bg>
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version
15 * 2 of the License, or (at your option) any later version.
16 *
17 * Changes:
18 *
19 */
20
21#define KMSG_COMPONENT "IPVS"
22#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
23
24#include <linux/module.h>
25#include <linux/init.h>
26#include <linux/types.h>
27#include <linux/capability.h>
28#include <linux/fs.h>
29#include <linux/sysctl.h>
30#include <linux/proc_fs.h>
31#include <linux/workqueue.h>
32#include <linux/swap.h>
33#include <linux/seq_file.h>
34#include <linux/slab.h>
35
36#include <linux/netfilter.h>
37#include <linux/netfilter_ipv4.h>
38#include <linux/mutex.h>
39
40#include <net/net_namespace.h>
41#include <linux/nsproxy.h>
42#include <net/ip.h>
43#ifdef CONFIG_IP_VS_IPV6
44#include <net/ipv6.h>
45#include <net/ip6_route.h>
46#endif
47#include <net/route.h>
48#include <net/sock.h>
49#include <net/genetlink.h>
50
51#include <asm/uaccess.h>
52
53#include <net/ip_vs.h>
54
55/* semaphore for IPVS sockopts. And, [gs]etsockopt may sleep. */
56static DEFINE_MUTEX(__ip_vs_mutex);
57
58/* sysctl variables */
59
60#ifdef CONFIG_IP_VS_DEBUG
61static int sysctl_ip_vs_debug_level = 0;
62
63int ip_vs_get_debug_level(void)
64{
65 return sysctl_ip_vs_debug_level;
66}
67#endif
68
69
70/* Protos */
71static 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? */
76static 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 */
97static 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
224static void defense_work_handler(struct work_struct *work)
225{
226 struct netns_ipvs *ipvs =
227 container_of(work, struct netns_ipvs, defense_work.work);
228
229 update_defense_level(ipvs);
230 if (atomic_read(&ipvs->dropentry))
231 ip_vs_random_dropentry(ipvs->net);
232 schedule_delayed_work(&ipvs->defense_work, DEFENSE_TIMER_PERIOD);
233}
234#endif
235
236int
237ip_vs_use_count_inc(void)
238{
239 return try_module_get(THIS_MODULE);
240}
241
242void
243ip_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> */
257static struct hlist_head ip_vs_svc_table[IP_VS_SVC_TAB_SIZE];
258/* the service table hashed by fwmark */
259static struct hlist_head ip_vs_svc_fwm_table[IP_VS_SVC_TAB_SIZE];
260
261
262/*
263 * Returns hash value for virtual service
264 */
265static inline unsigned int
266ip_vs_svc_hashkey(struct net *net, 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) net >> 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 */
288static inline unsigned int ip_vs_svc_fwm_hashkey(struct net *net, __u32 fwmark)
289{
290 return (((size_t)net>>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 */
298static 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->net, 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->net, 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 */
334static 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 */
359static inline struct ip_vs_service *
360__ip_vs_service_find(struct net *net, 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(net, 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 && net_eq(svc->net, net)) {
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 */
387static inline struct ip_vs_service *
388__ip_vs_svc_fwm_find(struct net *net, 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(net, 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 && net_eq(svc->net, net)) {
399 /* HIT */
400 return svc;
401 }
402 }
403
404 return NULL;
405}
406
407/* Find service, called under RCU lock */
408struct ip_vs_service *
409ip_vs_service_find(struct net *net, int af, __u32 fwmark, __u16 protocol,
410 const union nf_inet_addr *vaddr, __be16 vport)
411{
412 struct ip_vs_service *svc;
413 struct netns_ipvs *ipvs = net_ipvs(net);
414
415 /*
416 * Check the table hashed by fwmark first
417 */
418 if (fwmark) {
419 svc = __ip_vs_svc_fwm_find(net, af, fwmark);
420 if (svc)
421 goto out;
422 }
423
424 /*
425 * Check the table hashed by <protocol,addr,port>
426 * for "full" addressed entries
427 */
428 svc = __ip_vs_service_find(net, af, protocol, vaddr, vport);
429
430 if (svc == NULL
431 && protocol == IPPROTO_TCP
432 && atomic_read(&ipvs->ftpsvc_counter)
433 && (vport == FTPDATA || ntohs(vport) >= PROT_SOCK)) {
434 /*
435 * Check if ftp service entry exists, the packet
436 * might belong to FTP data connections.
437 */
438 svc = __ip_vs_service_find(net, af, protocol, vaddr, FTPPORT);
439 }
440
441 if (svc == NULL
442 && atomic_read(&ipvs->nullsvc_counter)) {
443 /*
444 * Check if the catch-all port (port zero) exists
445 */
446 svc = __ip_vs_service_find(net, af, protocol, vaddr, 0);
447 }
448
449 out:
450 IP_VS_DBG_BUF(9, "lookup service: fwm %u %s %s:%u %s\n",
451 fwmark, ip_vs_proto_name(protocol),
452 IP_VS_DBG_ADDR(af, vaddr), ntohs(vport),
453 svc ? "hit" : "not hit");
454
455 return svc;
456}
457
458
459static inline void
460__ip_vs_bind_svc(struct ip_vs_dest *dest, struct ip_vs_service *svc)
461{
462 atomic_inc(&svc->refcnt);
463 rcu_assign_pointer(dest->svc, svc);
464}
465
466static void ip_vs_service_free(struct ip_vs_service *svc)
467{
468 if (svc->stats.cpustats)
469 free_percpu(svc->stats.cpustats);
470 kfree(svc);
471}
472
473static void ip_vs_service_rcu_free(struct rcu_head *head)
474{
475 struct ip_vs_service *svc;
476
477 svc = container_of(head, struct ip_vs_service, rcu_head);
478 ip_vs_service_free(svc);
479}
480
481static void __ip_vs_svc_put(struct ip_vs_service *svc, bool do_delay)
482{
483 if (atomic_dec_and_test(&svc->refcnt)) {
484 IP_VS_DBG_BUF(3, "Removing service %u/%s:%u\n",
485 svc->fwmark,
486 IP_VS_DBG_ADDR(svc->af, &svc->addr),
487 ntohs(svc->port));
488 if (do_delay)
489 call_rcu(&svc->rcu_head, ip_vs_service_rcu_free);
490 else
491 ip_vs_service_free(svc);
492 }
493}
494
495
496/*
497 * Returns hash value for real service
498 */
499static inline unsigned int ip_vs_rs_hashkey(int af,
500 const union nf_inet_addr *addr,
501 __be16 port)
502{
503 register unsigned int porth = ntohs(port);
504 __be32 addr_fold = addr->ip;
505
506#ifdef CONFIG_IP_VS_IPV6
507 if (af == AF_INET6)
508 addr_fold = addr->ip6[0]^addr->ip6[1]^
509 addr->ip6[2]^addr->ip6[3];
510#endif
511
512 return (ntohl(addr_fold)^(porth>>IP_VS_RTAB_BITS)^porth)
513 & IP_VS_RTAB_MASK;
514}
515
516/* Hash ip_vs_dest in rs_table by <proto,addr,port>. */
517static void ip_vs_rs_hash(struct netns_ipvs *ipvs, struct ip_vs_dest *dest)
518{
519 unsigned int hash;
520
521 if (dest->in_rs_table)
522 return;
523
524 /*
525 * Hash by proto,addr,port,
526 * which are the parameters of the real service.
527 */
528 hash = ip_vs_rs_hashkey(dest->af, &dest->addr, dest->port);
529
530 hlist_add_head_rcu(&dest->d_list, &ipvs->rs_table[hash]);
531 dest->in_rs_table = 1;
532}
533
534/* Unhash ip_vs_dest from rs_table. */
535static void ip_vs_rs_unhash(struct ip_vs_dest *dest)
536{
537 /*
538 * Remove it from the rs_table table.
539 */
540 if (dest->in_rs_table) {
541 hlist_del_rcu(&dest->d_list);
542 dest->in_rs_table = 0;
543 }
544}
545
546/* Check if real service by <proto,addr,port> is present */
547bool ip_vs_has_real_service(struct net *net, int af, __u16 protocol,
548 const union nf_inet_addr *daddr, __be16 dport)
549{
550 struct netns_ipvs *ipvs = net_ipvs(net);
551 unsigned int hash;
552 struct ip_vs_dest *dest;
553
554 /* Check for "full" addressed entries */
555 hash = ip_vs_rs_hashkey(af, daddr, dport);
556
557 rcu_read_lock();
558 hlist_for_each_entry_rcu(dest, &ipvs->rs_table[hash], d_list) {
559 if (dest->port == dport &&
560 dest->af == af &&
561 ip_vs_addr_equal(af, &dest->addr, daddr) &&
562 (dest->protocol == protocol || dest->vfwmark)) {
563 /* HIT */
564 rcu_read_unlock();
565 return true;
566 }
567 }
568 rcu_read_unlock();
569
570 return false;
571}
572
573/* Lookup destination by {addr,port} in the given service
574 * Called under RCU lock.
575 */
576static struct ip_vs_dest *
577ip_vs_lookup_dest(struct ip_vs_service *svc, const union nf_inet_addr *daddr,
578 __be16 dport)
579{
580 struct ip_vs_dest *dest;
581
582 /*
583 * Find the destination for the given service
584 */
585 list_for_each_entry_rcu(dest, &svc->destinations, n_list) {
586 if ((dest->af == svc->af)
587 && ip_vs_addr_equal(svc->af, &dest->addr, daddr)
588 && (dest->port == dport)) {
589 /* HIT */
590 return dest;
591 }
592 }
593
594 return NULL;
595}
596
597/*
598 * Find destination by {daddr,dport,vaddr,protocol}
599 * Created to be used in ip_vs_process_message() in
600 * the backup synchronization daemon. It finds the
601 * destination to be bound to the received connection
602 * on the backup.
603 * Called under RCU lock, no refcnt is returned.
604 */
605struct ip_vs_dest *ip_vs_find_dest(struct net *net, int af,
606 const union nf_inet_addr *daddr,
607 __be16 dport,
608 const union nf_inet_addr *vaddr,
609 __be16 vport, __u16 protocol, __u32 fwmark,
610 __u32 flags)
611{
612 struct ip_vs_dest *dest;
613 struct ip_vs_service *svc;
614 __be16 port = dport;
615
616 svc = ip_vs_service_find(net, af, fwmark, protocol, vaddr, vport);
617 if (!svc)
618 return NULL;
619 if (fwmark && (flags & IP_VS_CONN_F_FWD_MASK) != IP_VS_CONN_F_MASQ)
620 port = 0;
621 dest = ip_vs_lookup_dest(svc, daddr, port);
622 if (!dest)
623 dest = ip_vs_lookup_dest(svc, daddr, port ^ dport);
624 return dest;
625}
626
627void ip_vs_dest_dst_rcu_free(struct rcu_head *head)
628{
629 struct ip_vs_dest_dst *dest_dst = container_of(head,
630 struct ip_vs_dest_dst,
631 rcu_head);
632
633 dst_release(dest_dst->dst_cache);
634 kfree(dest_dst);
635}
636
637/* Release dest_dst and dst_cache for dest in user context */
638static void __ip_vs_dst_cache_reset(struct ip_vs_dest *dest)
639{
640 struct ip_vs_dest_dst *old;
641
642 old = rcu_dereference_protected(dest->dest_dst, 1);
643 if (old) {
644 RCU_INIT_POINTER(dest->dest_dst, NULL);
645 call_rcu(&old->rcu_head, ip_vs_dest_dst_rcu_free);
646 }
647}
648
649/*
650 * Lookup dest by {svc,addr,port} in the destination trash.
651 * The destination trash is used to hold the destinations that are removed
652 * from the service table but are still referenced by some conn entries.
653 * The reason to add the destination trash is when the dest is temporary
654 * down (either by administrator or by monitor program), the dest can be
655 * picked back from the trash, the remaining connections to the dest can
656 * continue, and the counting information of the dest is also useful for
657 * scheduling.
658 */
659static struct ip_vs_dest *
660ip_vs_trash_get_dest(struct ip_vs_service *svc, const union nf_inet_addr *daddr,
661 __be16 dport)
662{
663 struct ip_vs_dest *dest;
664 struct netns_ipvs *ipvs = net_ipvs(svc->net);
665
666 /*
667 * Find the destination in trash
668 */
669 spin_lock_bh(&ipvs->dest_trash_lock);
670 list_for_each_entry(dest, &ipvs->dest_trash, t_list) {
671 IP_VS_DBG_BUF(3, "Destination %u/%s:%u still in trash, "
672 "dest->refcnt=%d\n",
673 dest->vfwmark,
674 IP_VS_DBG_ADDR(svc->af, &dest->addr),
675 ntohs(dest->port),
676 atomic_read(&dest->refcnt));
677 if (dest->af == svc->af &&
678 ip_vs_addr_equal(svc->af, &dest->addr, daddr) &&
679 dest->port == dport &&
680 dest->vfwmark == svc->fwmark &&
681 dest->protocol == svc->protocol &&
682 (svc->fwmark ||
683 (ip_vs_addr_equal(svc->af, &dest->vaddr, &svc->addr) &&
684 dest->vport == svc->port))) {
685 /* HIT */
686 list_del(&dest->t_list);
687 ip_vs_dest_hold(dest);
688 goto out;
689 }
690 }
691
692 dest = NULL;
693
694out:
695 spin_unlock_bh(&ipvs->dest_trash_lock);
696
697 return dest;
698}
699
700static void ip_vs_dest_free(struct ip_vs_dest *dest)
701{
702 struct ip_vs_service *svc = rcu_dereference_protected(dest->svc, 1);
703
704 __ip_vs_dst_cache_reset(dest);
705 __ip_vs_svc_put(svc, false);
706 free_percpu(dest->stats.cpustats);
707 ip_vs_dest_put_and_free(dest);
708}
709
710/*
711 * Clean up all the destinations in the trash
712 * Called by the ip_vs_control_cleanup()
713 *
714 * When the ip_vs_control_clearup is activated by ipvs module exit,
715 * the service tables must have been flushed and all the connections
716 * are expired, and the refcnt of each destination in the trash must
717 * be 0, so we simply release them here.
718 */
719static void ip_vs_trash_cleanup(struct net *net)
720{
721 struct ip_vs_dest *dest, *nxt;
722 struct netns_ipvs *ipvs = net_ipvs(net);
723
724 del_timer_sync(&ipvs->dest_trash_timer);
725 /* No need to use dest_trash_lock */
726 list_for_each_entry_safe(dest, nxt, &ipvs->dest_trash, t_list) {
727 list_del(&dest->t_list);
728 ip_vs_dest_free(dest);
729 }
730}
731
732static void
733ip_vs_copy_stats(struct ip_vs_stats_user *dst, struct ip_vs_stats *src)
734{
735#define IP_VS_SHOW_STATS_COUNTER(c) dst->c = src->ustats.c - src->ustats0.c
736
737 spin_lock_bh(&src->lock);
738
739 IP_VS_SHOW_STATS_COUNTER(conns);
740 IP_VS_SHOW_STATS_COUNTER(inpkts);
741 IP_VS_SHOW_STATS_COUNTER(outpkts);
742 IP_VS_SHOW_STATS_COUNTER(inbytes);
743 IP_VS_SHOW_STATS_COUNTER(outbytes);
744
745 ip_vs_read_estimator(dst, src);
746
747 spin_unlock_bh(&src->lock);
748}
749
750static void
751ip_vs_zero_stats(struct ip_vs_stats *stats)
752{
753 spin_lock_bh(&stats->lock);
754
755 /* get current counters as zero point, rates are zeroed */
756
757#define IP_VS_ZERO_STATS_COUNTER(c) stats->ustats0.c = stats->ustats.c
758
759 IP_VS_ZERO_STATS_COUNTER(conns);
760 IP_VS_ZERO_STATS_COUNTER(inpkts);
761 IP_VS_ZERO_STATS_COUNTER(outpkts);
762 IP_VS_ZERO_STATS_COUNTER(inbytes);
763 IP_VS_ZERO_STATS_COUNTER(outbytes);
764
765 ip_vs_zero_estimator(stats);
766
767 spin_unlock_bh(&stats->lock);
768}
769
770/*
771 * Update a destination in the given service
772 */
773static void
774__ip_vs_update_dest(struct ip_vs_service *svc, struct ip_vs_dest *dest,
775 struct ip_vs_dest_user_kern *udest, int add)
776{
777 struct netns_ipvs *ipvs = net_ipvs(svc->net);
778 struct ip_vs_service *old_svc;
779 struct ip_vs_scheduler *sched;
780 int conn_flags;
781
782 /* set the weight and the flags */
783 atomic_set(&dest->weight, udest->weight);
784 conn_flags = udest->conn_flags & IP_VS_CONN_F_DEST_MASK;
785 conn_flags |= IP_VS_CONN_F_INACTIVE;
786
787 /* set the IP_VS_CONN_F_NOOUTPUT flag if not masquerading/NAT */
788 if ((conn_flags & IP_VS_CONN_F_FWD_MASK) != IP_VS_CONN_F_MASQ) {
789 conn_flags |= IP_VS_CONN_F_NOOUTPUT;
790 } else {
791 /*
792 * Put the real service in rs_table if not present.
793 * For now only for NAT!
794 */
795 ip_vs_rs_hash(ipvs, dest);
796 }
797 atomic_set(&dest->conn_flags, conn_flags);
798
799 /* bind the service */
800 old_svc = rcu_dereference_protected(dest->svc, 1);
801 if (!old_svc) {
802 __ip_vs_bind_svc(dest, svc);
803 } else {
804 if (old_svc != svc) {
805 ip_vs_zero_stats(&dest->stats);
806 __ip_vs_bind_svc(dest, svc);
807 __ip_vs_svc_put(old_svc, true);
808 }
809 }
810
811 /* set the dest status flags */
812 dest->flags |= IP_VS_DEST_F_AVAILABLE;
813
814 if (udest->u_threshold == 0 || udest->u_threshold > dest->u_threshold)
815 dest->flags &= ~IP_VS_DEST_F_OVERLOAD;
816 dest->u_threshold = udest->u_threshold;
817 dest->l_threshold = udest->l_threshold;
818
819 spin_lock_bh(&dest->dst_lock);
820 __ip_vs_dst_cache_reset(dest);
821 spin_unlock_bh(&dest->dst_lock);
822
823 sched = rcu_dereference_protected(svc->scheduler, 1);
824 if (add) {
825 ip_vs_start_estimator(svc->net, &dest->stats);
826 list_add_rcu(&dest->n_list, &svc->destinations);
827 svc->num_dests++;
828 if (sched->add_dest)
829 sched->add_dest(svc, dest);
830 } else {
831 if (sched->upd_dest)
832 sched->upd_dest(svc, dest);
833 }
834}
835
836
837/*
838 * Create a destination for the given service
839 */
840static int
841ip_vs_new_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest,
842 struct ip_vs_dest **dest_p)
843{
844 struct ip_vs_dest *dest;
845 unsigned int atype;
846
847 EnterFunction(2);
848
849#ifdef CONFIG_IP_VS_IPV6
850 if (svc->af == AF_INET6) {
851 atype = ipv6_addr_type(&udest->addr.in6);
852 if ((!(atype & IPV6_ADDR_UNICAST) ||
853 atype & IPV6_ADDR_LINKLOCAL) &&
854 !__ip_vs_addr_is_local_v6(svc->net, &udest->addr.in6))
855 return -EINVAL;
856 } else
857#endif
858 {
859 atype = inet_addr_type(svc->net, udest->addr.ip);
860 if (atype != RTN_LOCAL && atype != RTN_UNICAST)
861 return -EINVAL;
862 }
863
864 dest = kzalloc(sizeof(struct ip_vs_dest), GFP_KERNEL);
865 if (dest == NULL)
866 return -ENOMEM;
867
868 dest->stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
869 if (!dest->stats.cpustats)
870 goto err_alloc;
871
872 dest->af = svc->af;
873 dest->protocol = svc->protocol;
874 dest->vaddr = svc->addr;
875 dest->vport = svc->port;
876 dest->vfwmark = svc->fwmark;
877 ip_vs_addr_copy(svc->af, &dest->addr, &udest->addr);
878 dest->port = udest->port;
879
880 atomic_set(&dest->activeconns, 0);
881 atomic_set(&dest->inactconns, 0);
882 atomic_set(&dest->persistconns, 0);
883 atomic_set(&dest->refcnt, 1);
884
885 INIT_HLIST_NODE(&dest->d_list);
886 spin_lock_init(&dest->dst_lock);
887 spin_lock_init(&dest->stats.lock);
888 __ip_vs_update_dest(svc, dest, udest, 1);
889
890 *dest_p = dest;
891
892 LeaveFunction(2);
893 return 0;
894
895err_alloc:
896 kfree(dest);
897 return -ENOMEM;
898}
899
900
901/*
902 * Add a destination into an existing service
903 */
904static int
905ip_vs_add_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
906{
907 struct ip_vs_dest *dest;
908 union nf_inet_addr daddr;
909 __be16 dport = udest->port;
910 int ret;
911
912 EnterFunction(2);
913
914 if (udest->weight < 0) {
915 pr_err("%s(): server weight less than zero\n", __func__);
916 return -ERANGE;
917 }
918
919 if (udest->l_threshold > udest->u_threshold) {
920 pr_err("%s(): lower threshold is higher than upper threshold\n",
921 __func__);
922 return -ERANGE;
923 }
924
925 ip_vs_addr_copy(svc->af, &daddr, &udest->addr);
926
927 /* We use function that requires RCU lock */
928 rcu_read_lock();
929 dest = ip_vs_lookup_dest(svc, &daddr, dport);
930 rcu_read_unlock();
931
932 if (dest != NULL) {
933 IP_VS_DBG(1, "%s(): dest already exists\n", __func__);
934 return -EEXIST;
935 }
936
937 /*
938 * Check if the dest already exists in the trash and
939 * is from the same service
940 */
941 dest = ip_vs_trash_get_dest(svc, &daddr, dport);
942
943 if (dest != NULL) {
944 IP_VS_DBG_BUF(3, "Get destination %s:%u from trash, "
945 "dest->refcnt=%d, service %u/%s:%u\n",
946 IP_VS_DBG_ADDR(svc->af, &daddr), ntohs(dport),
947 atomic_read(&dest->refcnt),
948 dest->vfwmark,
949 IP_VS_DBG_ADDR(svc->af, &dest->vaddr),
950 ntohs(dest->vport));
951
952 __ip_vs_update_dest(svc, dest, udest, 1);
953 ret = 0;
954 } else {
955 /*
956 * Allocate and initialize the dest structure
957 */
958 ret = ip_vs_new_dest(svc, udest, &dest);
959 }
960 LeaveFunction(2);
961
962 return ret;
963}
964
965
966/*
967 * Edit a destination in the given service
968 */
969static int
970ip_vs_edit_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
971{
972 struct ip_vs_dest *dest;
973 union nf_inet_addr daddr;
974 __be16 dport = udest->port;
975
976 EnterFunction(2);
977
978 if (udest->weight < 0) {
979 pr_err("%s(): server weight less than zero\n", __func__);
980 return -ERANGE;
981 }
982
983 if (udest->l_threshold > udest->u_threshold) {
984 pr_err("%s(): lower threshold is higher than upper threshold\n",
985 __func__);
986 return -ERANGE;
987 }
988
989 ip_vs_addr_copy(svc->af, &daddr, &udest->addr);
990
991 /* We use function that requires RCU lock */
992 rcu_read_lock();
993 dest = ip_vs_lookup_dest(svc, &daddr, dport);
994 rcu_read_unlock();
995
996 if (dest == NULL) {
997 IP_VS_DBG(1, "%s(): dest doesn't exist\n", __func__);
998 return -ENOENT;
999 }
1000
1001 __ip_vs_update_dest(svc, dest, udest, 0);
1002 LeaveFunction(2);
1003
1004 return 0;
1005}
1006
1007/*
1008 * Delete a destination (must be already unlinked from the service)
1009 */
1010static void __ip_vs_del_dest(struct net *net, struct ip_vs_dest *dest,
1011 bool cleanup)
1012{
1013 struct netns_ipvs *ipvs = net_ipvs(net);
1014
1015 ip_vs_stop_estimator(net, &dest->stats);
1016
1017 /*
1018 * Remove it from the d-linked list with the real services.
1019 */
1020 ip_vs_rs_unhash(dest);
1021
1022 spin_lock_bh(&ipvs->dest_trash_lock);
1023 IP_VS_DBG_BUF(3, "Moving dest %s:%u into trash, dest->refcnt=%d\n",
1024 IP_VS_DBG_ADDR(dest->af, &dest->addr), ntohs(dest->port),
1025 atomic_read(&dest->refcnt));
1026 if (list_empty(&ipvs->dest_trash) && !cleanup)
1027 mod_timer(&ipvs->dest_trash_timer,
1028 jiffies + (IP_VS_DEST_TRASH_PERIOD >> 1));
1029 /* dest lives in trash without reference */
1030 list_add(&dest->t_list, &ipvs->dest_trash);
1031 dest->idle_start = 0;
1032 spin_unlock_bh(&ipvs->dest_trash_lock);
1033 ip_vs_dest_put(dest);
1034}
1035
1036
1037/*
1038 * Unlink a destination from the given service
1039 */
1040static void __ip_vs_unlink_dest(struct ip_vs_service *svc,
1041 struct ip_vs_dest *dest,
1042 int svcupd)
1043{
1044 dest->flags &= ~IP_VS_DEST_F_AVAILABLE;
1045
1046 /*
1047 * Remove it from the d-linked destination list.
1048 */
1049 list_del_rcu(&dest->n_list);
1050 svc->num_dests--;
1051
1052 if (svcupd) {
1053 struct ip_vs_scheduler *sched;
1054
1055 sched = rcu_dereference_protected(svc->scheduler, 1);
1056 if (sched->del_dest)
1057 sched->del_dest(svc, dest);
1058 }
1059}
1060
1061
1062/*
1063 * Delete a destination server in the given service
1064 */
1065static int
1066ip_vs_del_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
1067{
1068 struct ip_vs_dest *dest;
1069 __be16 dport = udest->port;
1070
1071 EnterFunction(2);
1072
1073 /* We use function that requires RCU lock */
1074 rcu_read_lock();
1075 dest = ip_vs_lookup_dest(svc, &udest->addr, dport);
1076 rcu_read_unlock();
1077
1078 if (dest == NULL) {
1079 IP_VS_DBG(1, "%s(): destination not found!\n", __func__);
1080 return -ENOENT;
1081 }
1082
1083 /*
1084 * Unlink dest from the service
1085 */
1086 __ip_vs_unlink_dest(svc, dest, 1);
1087
1088 /*
1089 * Delete the destination
1090 */
1091 __ip_vs_del_dest(svc->net, dest, false);
1092
1093 LeaveFunction(2);
1094
1095 return 0;
1096}
1097
1098static void ip_vs_dest_trash_expire(unsigned long data)
1099{
1100 struct net *net = (struct net *) data;
1101 struct netns_ipvs *ipvs = net_ipvs(net);
1102 struct ip_vs_dest *dest, *next;
1103 unsigned long now = jiffies;
1104
1105 spin_lock(&ipvs->dest_trash_lock);
1106 list_for_each_entry_safe(dest, next, &ipvs->dest_trash, t_list) {
1107 if (atomic_read(&dest->refcnt) > 0)
1108 continue;
1109 if (dest->idle_start) {
1110 if (time_before(now, dest->idle_start +
1111 IP_VS_DEST_TRASH_PERIOD))
1112 continue;
1113 } else {
1114 dest->idle_start = max(1UL, now);
1115 continue;
1116 }
1117 IP_VS_DBG_BUF(3, "Removing destination %u/%s:%u from trash\n",
1118 dest->vfwmark,
1119 IP_VS_DBG_ADDR(dest->af, &dest->addr),
1120 ntohs(dest->port));
1121 list_del(&dest->t_list);
1122 ip_vs_dest_free(dest);
1123 }
1124 if (!list_empty(&ipvs->dest_trash))
1125 mod_timer(&ipvs->dest_trash_timer,
1126 jiffies + (IP_VS_DEST_TRASH_PERIOD >> 1));
1127 spin_unlock(&ipvs->dest_trash_lock);
1128}
1129
1130/*
1131 * Add a service into the service hash table
1132 */
1133static int
1134ip_vs_add_service(struct net *net, struct ip_vs_service_user_kern *u,
1135 struct ip_vs_service **svc_p)
1136{
1137 int ret = 0;
1138 struct ip_vs_scheduler *sched = NULL;
1139 struct ip_vs_pe *pe = NULL;
1140 struct ip_vs_service *svc = NULL;
1141 struct netns_ipvs *ipvs = net_ipvs(net);
1142
1143 /* increase the module use count */
1144 ip_vs_use_count_inc();
1145
1146 /* Lookup the scheduler by 'u->sched_name' */
1147 sched = ip_vs_scheduler_get(u->sched_name);
1148 if (sched == NULL) {
1149 pr_info("Scheduler module ip_vs_%s not found\n", u->sched_name);
1150 ret = -ENOENT;
1151 goto out_err;
1152 }
1153
1154 if (u->pe_name && *u->pe_name) {
1155 pe = ip_vs_pe_getbyname(u->pe_name);
1156 if (pe == NULL) {
1157 pr_info("persistence engine module ip_vs_pe_%s "
1158 "not found\n", u->pe_name);
1159 ret = -ENOENT;
1160 goto out_err;
1161 }
1162 }
1163
1164#ifdef CONFIG_IP_VS_IPV6
1165 if (u->af == AF_INET6) {
1166 __u32 plen = (__force __u32) u->netmask;
1167
1168 if (plen < 1 || plen > 128) {
1169 ret = -EINVAL;
1170 goto out_err;
1171 }
1172 }
1173#endif
1174
1175 svc = kzalloc(sizeof(struct ip_vs_service), GFP_KERNEL);
1176 if (svc == NULL) {
1177 IP_VS_DBG(1, "%s(): no memory\n", __func__);
1178 ret = -ENOMEM;
1179 goto out_err;
1180 }
1181 svc->stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
1182 if (!svc->stats.cpustats) {
1183 ret = -ENOMEM;
1184 goto out_err;
1185 }
1186
1187 /* I'm the first user of the service */
1188 atomic_set(&svc->refcnt, 0);
1189
1190 svc->af = u->af;
1191 svc->protocol = u->protocol;
1192 ip_vs_addr_copy(svc->af, &svc->addr, &u->addr);
1193 svc->port = u->port;
1194 svc->fwmark = u->fwmark;
1195 svc->flags = u->flags;
1196 svc->timeout = u->timeout * HZ;
1197 svc->netmask = u->netmask;
1198 svc->net = net;
1199
1200 INIT_LIST_HEAD(&svc->destinations);
1201 spin_lock_init(&svc->sched_lock);
1202 spin_lock_init(&svc->stats.lock);
1203
1204 /* Bind the scheduler */
1205 ret = ip_vs_bind_scheduler(svc, sched);
1206 if (ret)
1207 goto out_err;
1208 sched = NULL;
1209
1210 /* Bind the ct retriever */
1211 RCU_INIT_POINTER(svc->pe, pe);
1212 pe = NULL;
1213
1214 /* Update the virtual service counters */
1215 if (svc->port == FTPPORT)
1216 atomic_inc(&ipvs->ftpsvc_counter);
1217 else if (svc->port == 0)
1218 atomic_inc(&ipvs->nullsvc_counter);
1219
1220 ip_vs_start_estimator(net, &svc->stats);
1221
1222 /* Count only IPv4 services for old get/setsockopt interface */
1223 if (svc->af == AF_INET)
1224 ipvs->num_services++;
1225
1226 /* Hash the service into the service table */
1227 ip_vs_svc_hash(svc);
1228
1229 *svc_p = svc;
1230 /* Now there is a service - full throttle */
1231 ipvs->enable = 1;
1232 return 0;
1233
1234
1235 out_err:
1236 if (svc != NULL) {
1237 ip_vs_unbind_scheduler(svc, sched);
1238 ip_vs_service_free(svc);
1239 }
1240 ip_vs_scheduler_put(sched);
1241 ip_vs_pe_put(pe);
1242
1243 /* decrease the module use count */
1244 ip_vs_use_count_dec();
1245
1246 return ret;
1247}
1248
1249
1250/*
1251 * Edit a service and bind it with a new scheduler
1252 */
1253static int
1254ip_vs_edit_service(struct ip_vs_service *svc, struct ip_vs_service_user_kern *u)
1255{
1256 struct ip_vs_scheduler *sched, *old_sched;
1257 struct ip_vs_pe *pe = NULL, *old_pe = NULL;
1258 int ret = 0;
1259
1260 /*
1261 * Lookup the scheduler, by 'u->sched_name'
1262 */
1263 sched = ip_vs_scheduler_get(u->sched_name);
1264 if (sched == NULL) {
1265 pr_info("Scheduler module ip_vs_%s not found\n", u->sched_name);
1266 return -ENOENT;
1267 }
1268 old_sched = sched;
1269
1270 if (u->pe_name && *u->pe_name) {
1271 pe = ip_vs_pe_getbyname(u->pe_name);
1272 if (pe == NULL) {
1273 pr_info("persistence engine module ip_vs_pe_%s "
1274 "not found\n", u->pe_name);
1275 ret = -ENOENT;
1276 goto out;
1277 }
1278 old_pe = pe;
1279 }
1280
1281#ifdef CONFIG_IP_VS_IPV6
1282 if (u->af == AF_INET6) {
1283 __u32 plen = (__force __u32) u->netmask;
1284
1285 if (plen < 1 || plen > 128) {
1286 ret = -EINVAL;
1287 goto out;
1288 }
1289 }
1290#endif
1291
1292 old_sched = rcu_dereference_protected(svc->scheduler, 1);
1293 if (sched != old_sched) {
1294 /* Bind the new scheduler */
1295 ret = ip_vs_bind_scheduler(svc, sched);
1296 if (ret) {
1297 old_sched = sched;
1298 goto out;
1299 }
1300 /* Unbind the old scheduler on success */
1301 ip_vs_unbind_scheduler(svc, old_sched);
1302 }
1303
1304 /*
1305 * Set the flags and timeout value
1306 */
1307 svc->flags = u->flags | IP_VS_SVC_F_HASHED;
1308 svc->timeout = u->timeout * HZ;
1309 svc->netmask = u->netmask;
1310
1311 old_pe = rcu_dereference_protected(svc->pe, 1);
1312 if (pe != old_pe)
1313 rcu_assign_pointer(svc->pe, pe);
1314
1315out:
1316 ip_vs_scheduler_put(old_sched);
1317 ip_vs_pe_put(old_pe);
1318 return ret;
1319}
1320
1321/*
1322 * Delete a service from the service list
1323 * - The service must be unlinked, unlocked and not referenced!
1324 * - We are called under _bh lock
1325 */
1326static void __ip_vs_del_service(struct ip_vs_service *svc, bool cleanup)
1327{
1328 struct ip_vs_dest *dest, *nxt;
1329 struct ip_vs_scheduler *old_sched;
1330 struct ip_vs_pe *old_pe;
1331 struct netns_ipvs *ipvs = net_ipvs(svc->net);
1332
1333 pr_info("%s: enter\n", __func__);
1334
1335 /* Count only IPv4 services for old get/setsockopt interface */
1336 if (svc->af == AF_INET)
1337 ipvs->num_services--;
1338
1339 ip_vs_stop_estimator(svc->net, &svc->stats);
1340
1341 /* Unbind scheduler */
1342 old_sched = rcu_dereference_protected(svc->scheduler, 1);
1343 ip_vs_unbind_scheduler(svc, old_sched);
1344 ip_vs_scheduler_put(old_sched);
1345
1346 /* Unbind persistence engine, keep svc->pe */
1347 old_pe = rcu_dereference_protected(svc->pe, 1);
1348 ip_vs_pe_put(old_pe);
1349
1350 /*
1351 * Unlink the whole destination list
1352 */
1353 list_for_each_entry_safe(dest, nxt, &svc->destinations, n_list) {
1354 __ip_vs_unlink_dest(svc, dest, 0);
1355 __ip_vs_del_dest(svc->net, dest, cleanup);
1356 }
1357
1358 /*
1359 * Update the virtual service counters
1360 */
1361 if (svc->port == FTPPORT)
1362 atomic_dec(&ipvs->ftpsvc_counter);
1363 else if (svc->port == 0)
1364 atomic_dec(&ipvs->nullsvc_counter);
1365
1366 /*
1367 * Free the service if nobody refers to it
1368 */
1369 __ip_vs_svc_put(svc, true);
1370
1371 /* decrease the module use count */
1372 ip_vs_use_count_dec();
1373}
1374
1375/*
1376 * Unlink a service from list and try to delete it if its refcnt reached 0
1377 */
1378static void ip_vs_unlink_service(struct ip_vs_service *svc, bool cleanup)
1379{
1380 /* Hold svc to avoid double release from dest_trash */
1381 atomic_inc(&svc->refcnt);
1382 /*
1383 * Unhash it from the service table
1384 */
1385 ip_vs_svc_unhash(svc);
1386
1387 __ip_vs_del_service(svc, cleanup);
1388}
1389
1390/*
1391 * Delete a service from the service list
1392 */
1393static int ip_vs_del_service(struct ip_vs_service *svc)
1394{
1395 if (svc == NULL)
1396 return -EEXIST;
1397 ip_vs_unlink_service(svc, false);
1398
1399 return 0;
1400}
1401
1402
1403/*
1404 * Flush all the virtual services
1405 */
1406static int ip_vs_flush(struct net *net, bool cleanup)
1407{
1408 int idx;
1409 struct ip_vs_service *svc;
1410 struct hlist_node *n;
1411
1412 /*
1413 * Flush the service table hashed by <netns,protocol,addr,port>
1414 */
1415 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1416 hlist_for_each_entry_safe(svc, n, &ip_vs_svc_table[idx],
1417 s_list) {
1418 if (net_eq(svc->net, net))
1419 ip_vs_unlink_service(svc, cleanup);
1420 }
1421 }
1422
1423 /*
1424 * Flush the service table hashed by fwmark
1425 */
1426 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1427 hlist_for_each_entry_safe(svc, n, &ip_vs_svc_fwm_table[idx],
1428 f_list) {
1429 if (net_eq(svc->net, net))
1430 ip_vs_unlink_service(svc, cleanup);
1431 }
1432 }
1433
1434 return 0;
1435}
1436
1437/*
1438 * Delete service by {netns} in the service table.
1439 * Called by __ip_vs_cleanup()
1440 */
1441void ip_vs_service_net_cleanup(struct net *net)
1442{
1443 EnterFunction(2);
1444 /* Check for "full" addressed entries */
1445 mutex_lock(&__ip_vs_mutex);
1446 ip_vs_flush(net, true);
1447 mutex_unlock(&__ip_vs_mutex);
1448 LeaveFunction(2);
1449}
1450
1451/* Put all references for device (dst_cache) */
1452static inline void
1453ip_vs_forget_dev(struct ip_vs_dest *dest, struct net_device *dev)
1454{
1455 struct ip_vs_dest_dst *dest_dst;
1456
1457 spin_lock_bh(&dest->dst_lock);
1458 dest_dst = rcu_dereference_protected(dest->dest_dst, 1);
1459 if (dest_dst && dest_dst->dst_cache->dev == dev) {
1460 IP_VS_DBG_BUF(3, "Reset dev:%s dest %s:%u ,dest->refcnt=%d\n",
1461 dev->name,
1462 IP_VS_DBG_ADDR(dest->af, &dest->addr),
1463 ntohs(dest->port),
1464 atomic_read(&dest->refcnt));
1465 __ip_vs_dst_cache_reset(dest);
1466 }
1467 spin_unlock_bh(&dest->dst_lock);
1468
1469}
1470/* Netdev event receiver
1471 * Currently only NETDEV_DOWN is handled to release refs to cached dsts
1472 */
1473static int ip_vs_dst_event(struct notifier_block *this, unsigned long event,
1474 void *ptr)
1475{
1476 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1477 struct net *net = dev_net(dev);
1478 struct netns_ipvs *ipvs = net_ipvs(net);
1479 struct ip_vs_service *svc;
1480 struct ip_vs_dest *dest;
1481 unsigned int idx;
1482
1483 if (event != NETDEV_DOWN || !ipvs)
1484 return NOTIFY_DONE;
1485 IP_VS_DBG(3, "%s() dev=%s\n", __func__, dev->name);
1486 EnterFunction(2);
1487 mutex_lock(&__ip_vs_mutex);
1488 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1489 hlist_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
1490 if (net_eq(svc->net, net)) {
1491 list_for_each_entry(dest, &svc->destinations,
1492 n_list) {
1493 ip_vs_forget_dev(dest, dev);
1494 }
1495 }
1496 }
1497
1498 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
1499 if (net_eq(svc->net, net)) {
1500 list_for_each_entry(dest, &svc->destinations,
1501 n_list) {
1502 ip_vs_forget_dev(dest, dev);
1503 }
1504 }
1505
1506 }
1507 }
1508
1509 spin_lock_bh(&ipvs->dest_trash_lock);
1510 list_for_each_entry(dest, &ipvs->dest_trash, t_list) {
1511 ip_vs_forget_dev(dest, dev);
1512 }
1513 spin_unlock_bh(&ipvs->dest_trash_lock);
1514 mutex_unlock(&__ip_vs_mutex);
1515 LeaveFunction(2);
1516 return NOTIFY_DONE;
1517}
1518
1519/*
1520 * Zero counters in a service or all services
1521 */
1522static int ip_vs_zero_service(struct ip_vs_service *svc)
1523{
1524 struct ip_vs_dest *dest;
1525
1526 list_for_each_entry(dest, &svc->destinations, n_list) {
1527 ip_vs_zero_stats(&dest->stats);
1528 }
1529 ip_vs_zero_stats(&svc->stats);
1530 return 0;
1531}
1532
1533static int ip_vs_zero_all(struct net *net)
1534{
1535 int idx;
1536 struct ip_vs_service *svc;
1537
1538 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1539 hlist_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
1540 if (net_eq(svc->net, net))
1541 ip_vs_zero_service(svc);
1542 }
1543 }
1544
1545 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1546 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
1547 if (net_eq(svc->net, net))
1548 ip_vs_zero_service(svc);
1549 }
1550 }
1551
1552 ip_vs_zero_stats(&net_ipvs(net)->tot_stats);
1553 return 0;
1554}
1555
1556#ifdef CONFIG_SYSCTL
1557
1558static int zero;
1559static int three = 3;
1560
1561static int
1562proc_do_defense_mode(struct ctl_table *table, int write,
1563 void __user *buffer, size_t *lenp, loff_t *ppos)
1564{
1565 struct net *net = current->nsproxy->net_ns;
1566 int *valp = table->data;
1567 int val = *valp;
1568 int rc;
1569
1570 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1571 if (write && (*valp != val)) {
1572 if ((*valp < 0) || (*valp > 3)) {
1573 /* Restore the correct value */
1574 *valp = val;
1575 } else {
1576 update_defense_level(net_ipvs(net));
1577 }
1578 }
1579 return rc;
1580}
1581
1582static int
1583proc_do_sync_threshold(struct ctl_table *table, int write,
1584 void __user *buffer, size_t *lenp, loff_t *ppos)
1585{
1586 int *valp = table->data;
1587 int val[2];
1588 int rc;
1589
1590 /* backup the value first */
1591 memcpy(val, valp, sizeof(val));
1592
1593 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1594 if (write && (valp[0] < 0 || valp[1] < 0 ||
1595 (valp[0] >= valp[1] && valp[1]))) {
1596 /* Restore the correct value */
1597 memcpy(valp, val, sizeof(val));
1598 }
1599 return rc;
1600}
1601
1602static int
1603proc_do_sync_mode(struct ctl_table *table, int write,
1604 void __user *buffer, size_t *lenp, loff_t *ppos)
1605{
1606 int *valp = table->data;
1607 int val = *valp;
1608 int rc;
1609
1610 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1611 if (write && (*valp != val)) {
1612 if ((*valp < 0) || (*valp > 1)) {
1613 /* Restore the correct value */
1614 *valp = val;
1615 }
1616 }
1617 return rc;
1618}
1619
1620static int
1621proc_do_sync_ports(struct ctl_table *table, int write,
1622 void __user *buffer, size_t *lenp, loff_t *ppos)
1623{
1624 int *valp = table->data;
1625 int val = *valp;
1626 int rc;
1627
1628 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1629 if (write && (*valp != val)) {
1630 if (*valp < 1 || !is_power_of_2(*valp)) {
1631 /* Restore the correct value */
1632 *valp = val;
1633 }
1634 }
1635 return rc;
1636}
1637
1638/*
1639 * IPVS sysctl table (under the /proc/sys/net/ipv4/vs/)
1640 * Do not change order or insert new entries without
1641 * align with netns init in ip_vs_control_net_init()
1642 */
1643
1644static struct ctl_table vs_vars[] = {
1645 {
1646 .procname = "amemthresh",
1647 .maxlen = sizeof(int),
1648 .mode = 0644,
1649 .proc_handler = proc_dointvec,
1650 },
1651 {
1652 .procname = "am_droprate",
1653 .maxlen = sizeof(int),
1654 .mode = 0644,
1655 .proc_handler = proc_dointvec,
1656 },
1657 {
1658 .procname = "drop_entry",
1659 .maxlen = sizeof(int),
1660 .mode = 0644,
1661 .proc_handler = proc_do_defense_mode,
1662 },
1663 {
1664 .procname = "drop_packet",
1665 .maxlen = sizeof(int),
1666 .mode = 0644,
1667 .proc_handler = proc_do_defense_mode,
1668 },
1669#ifdef CONFIG_IP_VS_NFCT
1670 {
1671 .procname = "conntrack",
1672 .maxlen = sizeof(int),
1673 .mode = 0644,
1674 .proc_handler = &proc_dointvec,
1675 },
1676#endif
1677 {
1678 .procname = "secure_tcp",
1679 .maxlen = sizeof(int),
1680 .mode = 0644,
1681 .proc_handler = proc_do_defense_mode,
1682 },
1683 {
1684 .procname = "snat_reroute",
1685 .maxlen = sizeof(int),
1686 .mode = 0644,
1687 .proc_handler = &proc_dointvec,
1688 },
1689 {
1690 .procname = "sync_version",
1691 .maxlen = sizeof(int),
1692 .mode = 0644,
1693 .proc_handler = &proc_do_sync_mode,
1694 },
1695 {
1696 .procname = "sync_ports",
1697 .maxlen = sizeof(int),
1698 .mode = 0644,
1699 .proc_handler = &proc_do_sync_ports,
1700 },
1701 {
1702 .procname = "sync_persist_mode",
1703 .maxlen = sizeof(int),
1704 .mode = 0644,
1705 .proc_handler = proc_dointvec,
1706 },
1707 {
1708 .procname = "sync_qlen_max",
1709 .maxlen = sizeof(unsigned long),
1710 .mode = 0644,
1711 .proc_handler = proc_doulongvec_minmax,
1712 },
1713 {
1714 .procname = "sync_sock_size",
1715 .maxlen = sizeof(int),
1716 .mode = 0644,
1717 .proc_handler = proc_dointvec,
1718 },
1719 {
1720 .procname = "cache_bypass",
1721 .maxlen = sizeof(int),
1722 .mode = 0644,
1723 .proc_handler = proc_dointvec,
1724 },
1725 {
1726 .procname = "expire_nodest_conn",
1727 .maxlen = sizeof(int),
1728 .mode = 0644,
1729 .proc_handler = proc_dointvec,
1730 },
1731 {
1732 .procname = "sloppy_tcp",
1733 .maxlen = sizeof(int),
1734 .mode = 0644,
1735 .proc_handler = proc_dointvec,
1736 },
1737 {
1738 .procname = "sloppy_sctp",
1739 .maxlen = sizeof(int),
1740 .mode = 0644,
1741 .proc_handler = proc_dointvec,
1742 },
1743 {
1744 .procname = "expire_quiescent_template",
1745 .maxlen = sizeof(int),
1746 .mode = 0644,
1747 .proc_handler = proc_dointvec,
1748 },
1749 {
1750 .procname = "sync_threshold",
1751 .maxlen =
1752 sizeof(((struct netns_ipvs *)0)->sysctl_sync_threshold),
1753 .mode = 0644,
1754 .proc_handler = proc_do_sync_threshold,
1755 },
1756 {
1757 .procname = "sync_refresh_period",
1758 .maxlen = sizeof(int),
1759 .mode = 0644,
1760 .proc_handler = proc_dointvec_jiffies,
1761 },
1762 {
1763 .procname = "sync_retries",
1764 .maxlen = sizeof(int),
1765 .mode = 0644,
1766 .proc_handler = proc_dointvec_minmax,
1767 .extra1 = &zero,
1768 .extra2 = &three,
1769 },
1770 {
1771 .procname = "nat_icmp_send",
1772 .maxlen = sizeof(int),
1773 .mode = 0644,
1774 .proc_handler = proc_dointvec,
1775 },
1776 {
1777 .procname = "pmtu_disc",
1778 .maxlen = sizeof(int),
1779 .mode = 0644,
1780 .proc_handler = proc_dointvec,
1781 },
1782 {
1783 .procname = "backup_only",
1784 .maxlen = sizeof(int),
1785 .mode = 0644,
1786 .proc_handler = proc_dointvec,
1787 },
1788#ifdef CONFIG_IP_VS_DEBUG
1789 {
1790 .procname = "debug_level",
1791 .data = &sysctl_ip_vs_debug_level,
1792 .maxlen = sizeof(int),
1793 .mode = 0644,
1794 .proc_handler = proc_dointvec,
1795 },
1796#endif
1797#if 0
1798 {
1799 .procname = "timeout_established",
1800 .data = &vs_timeout_table_dos.timeout[IP_VS_S_ESTABLISHED],
1801 .maxlen = sizeof(int),
1802 .mode = 0644,
1803 .proc_handler = proc_dointvec_jiffies,
1804 },
1805 {
1806 .procname = "timeout_synsent",
1807 .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYN_SENT],
1808 .maxlen = sizeof(int),
1809 .mode = 0644,
1810 .proc_handler = proc_dointvec_jiffies,
1811 },
1812 {
1813 .procname = "timeout_synrecv",
1814 .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYN_RECV],
1815 .maxlen = sizeof(int),
1816 .mode = 0644,
1817 .proc_handler = proc_dointvec_jiffies,
1818 },
1819 {
1820 .procname = "timeout_finwait",
1821 .data = &vs_timeout_table_dos.timeout[IP_VS_S_FIN_WAIT],
1822 .maxlen = sizeof(int),
1823 .mode = 0644,
1824 .proc_handler = proc_dointvec_jiffies,
1825 },
1826 {
1827 .procname = "timeout_timewait",
1828 .data = &vs_timeout_table_dos.timeout[IP_VS_S_TIME_WAIT],
1829 .maxlen = sizeof(int),
1830 .mode = 0644,
1831 .proc_handler = proc_dointvec_jiffies,
1832 },
1833 {
1834 .procname = "timeout_close",
1835 .data = &vs_timeout_table_dos.timeout[IP_VS_S_CLOSE],
1836 .maxlen = sizeof(int),
1837 .mode = 0644,
1838 .proc_handler = proc_dointvec_jiffies,
1839 },
1840 {
1841 .procname = "timeout_closewait",
1842 .data = &vs_timeout_table_dos.timeout[IP_VS_S_CLOSE_WAIT],
1843 .maxlen = sizeof(int),
1844 .mode = 0644,
1845 .proc_handler = proc_dointvec_jiffies,
1846 },
1847 {
1848 .procname = "timeout_lastack",
1849 .data = &vs_timeout_table_dos.timeout[IP_VS_S_LAST_ACK],
1850 .maxlen = sizeof(int),
1851 .mode = 0644,
1852 .proc_handler = proc_dointvec_jiffies,
1853 },
1854 {
1855 .procname = "timeout_listen",
1856 .data = &vs_timeout_table_dos.timeout[IP_VS_S_LISTEN],
1857 .maxlen = sizeof(int),
1858 .mode = 0644,
1859 .proc_handler = proc_dointvec_jiffies,
1860 },
1861 {
1862 .procname = "timeout_synack",
1863 .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYNACK],
1864 .maxlen = sizeof(int),
1865 .mode = 0644,
1866 .proc_handler = proc_dointvec_jiffies,
1867 },
1868 {
1869 .procname = "timeout_udp",
1870 .data = &vs_timeout_table_dos.timeout[IP_VS_S_UDP],
1871 .maxlen = sizeof(int),
1872 .mode = 0644,
1873 .proc_handler = proc_dointvec_jiffies,
1874 },
1875 {
1876 .procname = "timeout_icmp",
1877 .data = &vs_timeout_table_dos.timeout[IP_VS_S_ICMP],
1878 .maxlen = sizeof(int),
1879 .mode = 0644,
1880 .proc_handler = proc_dointvec_jiffies,
1881 },
1882#endif
1883 { }
1884};
1885
1886#endif
1887
1888#ifdef CONFIG_PROC_FS
1889
1890struct ip_vs_iter {
1891 struct seq_net_private p; /* Do not move this, netns depends upon it*/
1892 struct hlist_head *table;
1893 int bucket;
1894};
1895
1896/*
1897 * Write the contents of the VS rule table to a PROCfs file.
1898 * (It is kept just for backward compatibility)
1899 */
1900static inline const char *ip_vs_fwd_name(unsigned int flags)
1901{
1902 switch (flags & IP_VS_CONN_F_FWD_MASK) {
1903 case IP_VS_CONN_F_LOCALNODE:
1904 return "Local";
1905 case IP_VS_CONN_F_TUNNEL:
1906 return "Tunnel";
1907 case IP_VS_CONN_F_DROUTE:
1908 return "Route";
1909 default:
1910 return "Masq";
1911 }
1912}
1913
1914
1915/* Get the Nth entry in the two lists */
1916static struct ip_vs_service *ip_vs_info_array(struct seq_file *seq, loff_t pos)
1917{
1918 struct net *net = seq_file_net(seq);
1919 struct ip_vs_iter *iter = seq->private;
1920 int idx;
1921 struct ip_vs_service *svc;
1922
1923 /* look in hash by protocol */
1924 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1925 hlist_for_each_entry_rcu(svc, &ip_vs_svc_table[idx], s_list) {
1926 if (net_eq(svc->net, net) && pos-- == 0) {
1927 iter->table = ip_vs_svc_table;
1928 iter->bucket = idx;
1929 return svc;
1930 }
1931 }
1932 }
1933
1934 /* keep looking in fwmark */
1935 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1936 hlist_for_each_entry_rcu(svc, &ip_vs_svc_fwm_table[idx],
1937 f_list) {
1938 if (net_eq(svc->net, net) && pos-- == 0) {
1939 iter->table = ip_vs_svc_fwm_table;
1940 iter->bucket = idx;
1941 return svc;
1942 }
1943 }
1944 }
1945
1946 return NULL;
1947}
1948
1949static void *ip_vs_info_seq_start(struct seq_file *seq, loff_t *pos)
1950 __acquires(RCU)
1951{
1952 rcu_read_lock();
1953 return *pos ? ip_vs_info_array(seq, *pos - 1) : SEQ_START_TOKEN;
1954}
1955
1956
1957static void *ip_vs_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1958{
1959 struct hlist_node *e;
1960 struct ip_vs_iter *iter;
1961 struct ip_vs_service *svc;
1962
1963 ++*pos;
1964 if (v == SEQ_START_TOKEN)
1965 return ip_vs_info_array(seq,0);
1966
1967 svc = v;
1968 iter = seq->private;
1969
1970 if (iter->table == ip_vs_svc_table) {
1971 /* next service in table hashed by protocol */
1972 e = rcu_dereference(hlist_next_rcu(&svc->s_list));
1973 if (e)
1974 return hlist_entry(e, struct ip_vs_service, s_list);
1975
1976 while (++iter->bucket < IP_VS_SVC_TAB_SIZE) {
1977 hlist_for_each_entry_rcu(svc,
1978 &ip_vs_svc_table[iter->bucket],
1979 s_list) {
1980 return svc;
1981 }
1982 }
1983
1984 iter->table = ip_vs_svc_fwm_table;
1985 iter->bucket = -1;
1986 goto scan_fwmark;
1987 }
1988
1989 /* next service in hashed by fwmark */
1990 e = rcu_dereference(hlist_next_rcu(&svc->f_list));
1991 if (e)
1992 return hlist_entry(e, struct ip_vs_service, f_list);
1993
1994 scan_fwmark:
1995 while (++iter->bucket < IP_VS_SVC_TAB_SIZE) {
1996 hlist_for_each_entry_rcu(svc,
1997 &ip_vs_svc_fwm_table[iter->bucket],
1998 f_list)
1999 return svc;
2000 }
2001
2002 return NULL;
2003}
2004
2005static void ip_vs_info_seq_stop(struct seq_file *seq, void *v)
2006 __releases(RCU)
2007{
2008 rcu_read_unlock();
2009}
2010
2011
2012static int ip_vs_info_seq_show(struct seq_file *seq, void *v)
2013{
2014 if (v == SEQ_START_TOKEN) {
2015 seq_printf(seq,
2016 "IP Virtual Server version %d.%d.%d (size=%d)\n",
2017 NVERSION(IP_VS_VERSION_CODE), ip_vs_conn_tab_size);
2018 seq_puts(seq,
2019 "Prot LocalAddress:Port Scheduler Flags\n");
2020 seq_puts(seq,
2021 " -> RemoteAddress:Port Forward Weight ActiveConn InActConn\n");
2022 } else {
2023 const struct ip_vs_service *svc = v;
2024 const struct ip_vs_iter *iter = seq->private;
2025 const struct ip_vs_dest *dest;
2026 struct ip_vs_scheduler *sched = rcu_dereference(svc->scheduler);
2027
2028 if (iter->table == ip_vs_svc_table) {
2029#ifdef CONFIG_IP_VS_IPV6
2030 if (svc->af == AF_INET6)
2031 seq_printf(seq, "%s [%pI6]:%04X %s ",
2032 ip_vs_proto_name(svc->protocol),
2033 &svc->addr.in6,
2034 ntohs(svc->port),
2035 sched->name);
2036 else
2037#endif
2038 seq_printf(seq, "%s %08X:%04X %s %s ",
2039 ip_vs_proto_name(svc->protocol),
2040 ntohl(svc->addr.ip),
2041 ntohs(svc->port),
2042 sched->name,
2043 (svc->flags & IP_VS_SVC_F_ONEPACKET)?"ops ":"");
2044 } else {
2045 seq_printf(seq, "FWM %08X %s %s",
2046 svc->fwmark, sched->name,
2047 (svc->flags & IP_VS_SVC_F_ONEPACKET)?"ops ":"");
2048 }
2049
2050 if (svc->flags & IP_VS_SVC_F_PERSISTENT)
2051 seq_printf(seq, "persistent %d %08X\n",
2052 svc->timeout,
2053 ntohl(svc->netmask));
2054 else
2055 seq_putc(seq, '\n');
2056
2057 list_for_each_entry_rcu(dest, &svc->destinations, n_list) {
2058#ifdef CONFIG_IP_VS_IPV6
2059 if (dest->af == AF_INET6)
2060 seq_printf(seq,
2061 " -> [%pI6]:%04X"
2062 " %-7s %-6d %-10d %-10d\n",
2063 &dest->addr.in6,
2064 ntohs(dest->port),
2065 ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
2066 atomic_read(&dest->weight),
2067 atomic_read(&dest->activeconns),
2068 atomic_read(&dest->inactconns));
2069 else
2070#endif
2071 seq_printf(seq,
2072 " -> %08X:%04X "
2073 "%-7s %-6d %-10d %-10d\n",
2074 ntohl(dest->addr.ip),
2075 ntohs(dest->port),
2076 ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
2077 atomic_read(&dest->weight),
2078 atomic_read(&dest->activeconns),
2079 atomic_read(&dest->inactconns));
2080
2081 }
2082 }
2083 return 0;
2084}
2085
2086static const struct seq_operations ip_vs_info_seq_ops = {
2087 .start = ip_vs_info_seq_start,
2088 .next = ip_vs_info_seq_next,
2089 .stop = ip_vs_info_seq_stop,
2090 .show = ip_vs_info_seq_show,
2091};
2092
2093static int ip_vs_info_open(struct inode *inode, struct file *file)
2094{
2095 return seq_open_net(inode, file, &ip_vs_info_seq_ops,
2096 sizeof(struct ip_vs_iter));
2097}
2098
2099static const struct file_operations ip_vs_info_fops = {
2100 .owner = THIS_MODULE,
2101 .open = ip_vs_info_open,
2102 .read = seq_read,
2103 .llseek = seq_lseek,
2104 .release = seq_release_net,
2105};
2106
2107static int ip_vs_stats_show(struct seq_file *seq, void *v)
2108{
2109 struct net *net = seq_file_single_net(seq);
2110 struct ip_vs_stats_user show;
2111
2112/* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2113 seq_puts(seq,
2114 " Total Incoming Outgoing Incoming Outgoing\n");
2115 seq_printf(seq,
2116 " Conns Packets Packets Bytes Bytes\n");
2117
2118 ip_vs_copy_stats(&show, &net_ipvs(net)->tot_stats);
2119 seq_printf(seq, "%8X %8X %8X %16LX %16LX\n\n", show.conns,
2120 show.inpkts, show.outpkts,
2121 (unsigned long long) show.inbytes,
2122 (unsigned long long) show.outbytes);
2123
2124/* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2125 seq_puts(seq,
2126 " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
2127 seq_printf(seq, "%8X %8X %8X %16X %16X\n",
2128 show.cps, show.inpps, show.outpps,
2129 show.inbps, show.outbps);
2130
2131 return 0;
2132}
2133
2134static int ip_vs_stats_seq_open(struct inode *inode, struct file *file)
2135{
2136 return single_open_net(inode, file, ip_vs_stats_show);
2137}
2138
2139static const struct file_operations ip_vs_stats_fops = {
2140 .owner = THIS_MODULE,
2141 .open = ip_vs_stats_seq_open,
2142 .read = seq_read,
2143 .llseek = seq_lseek,
2144 .release = single_release_net,
2145};
2146
2147static int ip_vs_stats_percpu_show(struct seq_file *seq, void *v)
2148{
2149 struct net *net = seq_file_single_net(seq);
2150 struct ip_vs_stats *tot_stats = &net_ipvs(net)->tot_stats;
2151 struct ip_vs_cpu_stats __percpu *cpustats = tot_stats->cpustats;
2152 struct ip_vs_stats_user rates;
2153 int i;
2154
2155/* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2156 seq_puts(seq,
2157 " Total Incoming Outgoing Incoming Outgoing\n");
2158 seq_printf(seq,
2159 "CPU Conns Packets Packets Bytes Bytes\n");
2160
2161 for_each_possible_cpu(i) {
2162 struct ip_vs_cpu_stats *u = per_cpu_ptr(cpustats, i);
2163 unsigned int start;
2164 __u64 inbytes, outbytes;
2165
2166 do {
2167 start = u64_stats_fetch_begin_bh(&u->syncp);
2168 inbytes = u->ustats.inbytes;
2169 outbytes = u->ustats.outbytes;
2170 } while (u64_stats_fetch_retry_bh(&u->syncp, start));
2171
2172 seq_printf(seq, "%3X %8X %8X %8X %16LX %16LX\n",
2173 i, u->ustats.conns, u->ustats.inpkts,
2174 u->ustats.outpkts, (__u64)inbytes,
2175 (__u64)outbytes);
2176 }
2177
2178 spin_lock_bh(&tot_stats->lock);
2179
2180 seq_printf(seq, " ~ %8X %8X %8X %16LX %16LX\n\n",
2181 tot_stats->ustats.conns, tot_stats->ustats.inpkts,
2182 tot_stats->ustats.outpkts,
2183 (unsigned long long) tot_stats->ustats.inbytes,
2184 (unsigned long long) tot_stats->ustats.outbytes);
2185
2186 ip_vs_read_estimator(&rates, tot_stats);
2187
2188 spin_unlock_bh(&tot_stats->lock);
2189
2190/* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2191 seq_puts(seq,
2192 " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
2193 seq_printf(seq, " %8X %8X %8X %16X %16X\n",
2194 rates.cps,
2195 rates.inpps,
2196 rates.outpps,
2197 rates.inbps,
2198 rates.outbps);
2199
2200 return 0;
2201}
2202
2203static int ip_vs_stats_percpu_seq_open(struct inode *inode, struct file *file)
2204{
2205 return single_open_net(inode, file, ip_vs_stats_percpu_show);
2206}
2207
2208static const struct file_operations ip_vs_stats_percpu_fops = {
2209 .owner = THIS_MODULE,
2210 .open = ip_vs_stats_percpu_seq_open,
2211 .read = seq_read,
2212 .llseek = seq_lseek,
2213 .release = single_release_net,
2214};
2215#endif
2216
2217/*
2218 * Set timeout values for tcp tcpfin udp in the timeout_table.
2219 */
2220static int ip_vs_set_timeout(struct net *net, struct ip_vs_timeout_user *u)
2221{
2222#if defined(CONFIG_IP_VS_PROTO_TCP) || defined(CONFIG_IP_VS_PROTO_UDP)
2223 struct ip_vs_proto_data *pd;
2224#endif
2225
2226 IP_VS_DBG(2, "Setting timeout tcp:%d tcpfin:%d udp:%d\n",
2227 u->tcp_timeout,
2228 u->tcp_fin_timeout,
2229 u->udp_timeout);
2230
2231#ifdef CONFIG_IP_VS_PROTO_TCP
2232 if (u->tcp_timeout) {
2233 pd = ip_vs_proto_data_get(net, IPPROTO_TCP);
2234 pd->timeout_table[IP_VS_TCP_S_ESTABLISHED]
2235 = u->tcp_timeout * HZ;
2236 }
2237
2238 if (u->tcp_fin_timeout) {
2239 pd = ip_vs_proto_data_get(net, IPPROTO_TCP);
2240 pd->timeout_table[IP_VS_TCP_S_FIN_WAIT]
2241 = u->tcp_fin_timeout * HZ;
2242 }
2243#endif
2244
2245#ifdef CONFIG_IP_VS_PROTO_UDP
2246 if (u->udp_timeout) {
2247 pd = ip_vs_proto_data_get(net, IPPROTO_UDP);
2248 pd->timeout_table[IP_VS_UDP_S_NORMAL]
2249 = u->udp_timeout * HZ;
2250 }
2251#endif
2252 return 0;
2253}
2254
2255
2256#define SET_CMDID(cmd) (cmd - IP_VS_BASE_CTL)
2257#define SERVICE_ARG_LEN (sizeof(struct ip_vs_service_user))
2258#define SVCDEST_ARG_LEN (sizeof(struct ip_vs_service_user) + \
2259 sizeof(struct ip_vs_dest_user))
2260#define TIMEOUT_ARG_LEN (sizeof(struct ip_vs_timeout_user))
2261#define DAEMON_ARG_LEN (sizeof(struct ip_vs_daemon_user))
2262#define MAX_ARG_LEN SVCDEST_ARG_LEN
2263
2264static const unsigned char set_arglen[SET_CMDID(IP_VS_SO_SET_MAX)+1] = {
2265 [SET_CMDID(IP_VS_SO_SET_ADD)] = SERVICE_ARG_LEN,
2266 [SET_CMDID(IP_VS_SO_SET_EDIT)] = SERVICE_ARG_LEN,
2267 [SET_CMDID(IP_VS_SO_SET_DEL)] = SERVICE_ARG_LEN,
2268 [SET_CMDID(IP_VS_SO_SET_FLUSH)] = 0,
2269 [SET_CMDID(IP_VS_SO_SET_ADDDEST)] = SVCDEST_ARG_LEN,
2270 [SET_CMDID(IP_VS_SO_SET_DELDEST)] = SVCDEST_ARG_LEN,
2271 [SET_CMDID(IP_VS_SO_SET_EDITDEST)] = SVCDEST_ARG_LEN,
2272 [SET_CMDID(IP_VS_SO_SET_TIMEOUT)] = TIMEOUT_ARG_LEN,
2273 [SET_CMDID(IP_VS_SO_SET_STARTDAEMON)] = DAEMON_ARG_LEN,
2274 [SET_CMDID(IP_VS_SO_SET_STOPDAEMON)] = DAEMON_ARG_LEN,
2275 [SET_CMDID(IP_VS_SO_SET_ZERO)] = SERVICE_ARG_LEN,
2276};
2277
2278static void ip_vs_copy_usvc_compat(struct ip_vs_service_user_kern *usvc,
2279 struct ip_vs_service_user *usvc_compat)
2280{
2281 memset(usvc, 0, sizeof(*usvc));
2282
2283 usvc->af = AF_INET;
2284 usvc->protocol = usvc_compat->protocol;
2285 usvc->addr.ip = usvc_compat->addr;
2286 usvc->port = usvc_compat->port;
2287 usvc->fwmark = usvc_compat->fwmark;
2288
2289 /* Deep copy of sched_name is not needed here */
2290 usvc->sched_name = usvc_compat->sched_name;
2291
2292 usvc->flags = usvc_compat->flags;
2293 usvc->timeout = usvc_compat->timeout;
2294 usvc->netmask = usvc_compat->netmask;
2295}
2296
2297static void ip_vs_copy_udest_compat(struct ip_vs_dest_user_kern *udest,
2298 struct ip_vs_dest_user *udest_compat)
2299{
2300 memset(udest, 0, sizeof(*udest));
2301
2302 udest->addr.ip = udest_compat->addr;
2303 udest->port = udest_compat->port;
2304 udest->conn_flags = udest_compat->conn_flags;
2305 udest->weight = udest_compat->weight;
2306 udest->u_threshold = udest_compat->u_threshold;
2307 udest->l_threshold = udest_compat->l_threshold;
2308}
2309
2310static int
2311do_ip_vs_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len)
2312{
2313 struct net *net = sock_net(sk);
2314 int ret;
2315 unsigned char arg[MAX_ARG_LEN];
2316 struct ip_vs_service_user *usvc_compat;
2317 struct ip_vs_service_user_kern usvc;
2318 struct ip_vs_service *svc;
2319 struct ip_vs_dest_user *udest_compat;
2320 struct ip_vs_dest_user_kern udest;
2321 struct netns_ipvs *ipvs = net_ipvs(net);
2322
2323 if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
2324 return -EPERM;
2325
2326 if (cmd < IP_VS_BASE_CTL || cmd > IP_VS_SO_SET_MAX)
2327 return -EINVAL;
2328 if (len < 0 || len > MAX_ARG_LEN)
2329 return -EINVAL;
2330 if (len != set_arglen[SET_CMDID(cmd)]) {
2331 pr_err("set_ctl: len %u != %u\n",
2332 len, set_arglen[SET_CMDID(cmd)]);
2333 return -EINVAL;
2334 }
2335
2336 if (copy_from_user(arg, user, len) != 0)
2337 return -EFAULT;
2338
2339 /* increase the module use count */
2340 ip_vs_use_count_inc();
2341
2342 /* Handle daemons since they have another lock */
2343 if (cmd == IP_VS_SO_SET_STARTDAEMON ||
2344 cmd == IP_VS_SO_SET_STOPDAEMON) {
2345 struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg;
2346
2347 if (mutex_lock_interruptible(&ipvs->sync_mutex)) {
2348 ret = -ERESTARTSYS;
2349 goto out_dec;
2350 }
2351 if (cmd == IP_VS_SO_SET_STARTDAEMON)
2352 ret = start_sync_thread(net, dm->state, dm->mcast_ifn,
2353 dm->syncid);
2354 else
2355 ret = stop_sync_thread(net, dm->state);
2356 mutex_unlock(&ipvs->sync_mutex);
2357 goto out_dec;
2358 }
2359
2360 if (mutex_lock_interruptible(&__ip_vs_mutex)) {
2361 ret = -ERESTARTSYS;
2362 goto out_dec;
2363 }
2364
2365 if (cmd == IP_VS_SO_SET_FLUSH) {
2366 /* Flush the virtual service */
2367 ret = ip_vs_flush(net, false);
2368 goto out_unlock;
2369 } else if (cmd == IP_VS_SO_SET_TIMEOUT) {
2370 /* Set timeout values for (tcp tcpfin udp) */
2371 ret = ip_vs_set_timeout(net, (struct ip_vs_timeout_user *)arg);
2372 goto out_unlock;
2373 }
2374
2375 usvc_compat = (struct ip_vs_service_user *)arg;
2376 udest_compat = (struct ip_vs_dest_user *)(usvc_compat + 1);
2377
2378 /* We only use the new structs internally, so copy userspace compat
2379 * structs to extended internal versions */
2380 ip_vs_copy_usvc_compat(&usvc, usvc_compat);
2381 ip_vs_copy_udest_compat(&udest, udest_compat);
2382
2383 if (cmd == IP_VS_SO_SET_ZERO) {
2384 /* if no service address is set, zero counters in all */
2385 if (!usvc.fwmark && !usvc.addr.ip && !usvc.port) {
2386 ret = ip_vs_zero_all(net);
2387 goto out_unlock;
2388 }
2389 }
2390
2391 /* Check for valid protocol: TCP or UDP or SCTP, even for fwmark!=0 */
2392 if (usvc.protocol != IPPROTO_TCP && usvc.protocol != IPPROTO_UDP &&
2393 usvc.protocol != IPPROTO_SCTP) {
2394 pr_err("set_ctl: invalid protocol: %d %pI4:%d %s\n",
2395 usvc.protocol, &usvc.addr.ip,
2396 ntohs(usvc.port), usvc.sched_name);
2397 ret = -EFAULT;
2398 goto out_unlock;
2399 }
2400
2401 /* Lookup the exact service by <protocol, addr, port> or fwmark */
2402 rcu_read_lock();
2403 if (usvc.fwmark == 0)
2404 svc = __ip_vs_service_find(net, usvc.af, usvc.protocol,
2405 &usvc.addr, usvc.port);
2406 else
2407 svc = __ip_vs_svc_fwm_find(net, usvc.af, usvc.fwmark);
2408 rcu_read_unlock();
2409
2410 if (cmd != IP_VS_SO_SET_ADD
2411 && (svc == NULL || svc->protocol != usvc.protocol)) {
2412 ret = -ESRCH;
2413 goto out_unlock;
2414 }
2415
2416 switch (cmd) {
2417 case IP_VS_SO_SET_ADD:
2418 if (svc != NULL)
2419 ret = -EEXIST;
2420 else
2421 ret = ip_vs_add_service(net, &usvc, &svc);
2422 break;
2423 case IP_VS_SO_SET_EDIT:
2424 ret = ip_vs_edit_service(svc, &usvc);
2425 break;
2426 case IP_VS_SO_SET_DEL:
2427 ret = ip_vs_del_service(svc);
2428 if (!ret)
2429 goto out_unlock;
2430 break;
2431 case IP_VS_SO_SET_ZERO:
2432 ret = ip_vs_zero_service(svc);
2433 break;
2434 case IP_VS_SO_SET_ADDDEST:
2435 ret = ip_vs_add_dest(svc, &udest);
2436 break;
2437 case IP_VS_SO_SET_EDITDEST:
2438 ret = ip_vs_edit_dest(svc, &udest);
2439 break;
2440 case IP_VS_SO_SET_DELDEST:
2441 ret = ip_vs_del_dest(svc, &udest);
2442 break;
2443 default:
2444 ret = -EINVAL;
2445 }
2446
2447 out_unlock:
2448 mutex_unlock(&__ip_vs_mutex);
2449 out_dec:
2450 /* decrease the module use count */
2451 ip_vs_use_count_dec();
2452
2453 return ret;
2454}
2455
2456
2457static void
2458ip_vs_copy_service(struct ip_vs_service_entry *dst, struct ip_vs_service *src)
2459{
2460 struct ip_vs_scheduler *sched;
2461
2462 sched = rcu_dereference_protected(src->scheduler, 1);
2463 dst->protocol = src->protocol;
2464 dst->addr = src->addr.ip;
2465 dst->port = src->port;
2466 dst->fwmark = src->fwmark;
2467 strlcpy(dst->sched_name, sched->name, sizeof(dst->sched_name));
2468 dst->flags = src->flags;
2469 dst->timeout = src->timeout / HZ;
2470 dst->netmask = src->netmask;
2471 dst->num_dests = src->num_dests;
2472 ip_vs_copy_stats(&dst->stats, &src->stats);
2473}
2474
2475static inline int
2476__ip_vs_get_service_entries(struct net *net,
2477 const struct ip_vs_get_services *get,
2478 struct ip_vs_get_services __user *uptr)
2479{
2480 int idx, count=0;
2481 struct ip_vs_service *svc;
2482 struct ip_vs_service_entry entry;
2483 int ret = 0;
2484
2485 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
2486 hlist_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
2487 /* Only expose IPv4 entries to old interface */
2488 if (svc->af != AF_INET || !net_eq(svc->net, net))
2489 continue;
2490
2491 if (count >= get->num_services)
2492 goto out;
2493 memset(&entry, 0, sizeof(entry));
2494 ip_vs_copy_service(&entry, svc);
2495 if (copy_to_user(&uptr->entrytable[count],
2496 &entry, sizeof(entry))) {
2497 ret = -EFAULT;
2498 goto out;
2499 }
2500 count++;
2501 }
2502 }
2503
2504 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
2505 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
2506 /* Only expose IPv4 entries to old interface */
2507 if (svc->af != AF_INET || !net_eq(svc->net, net))
2508 continue;
2509
2510 if (count >= get->num_services)
2511 goto out;
2512 memset(&entry, 0, sizeof(entry));
2513 ip_vs_copy_service(&entry, svc);
2514 if (copy_to_user(&uptr->entrytable[count],
2515 &entry, sizeof(entry))) {
2516 ret = -EFAULT;
2517 goto out;
2518 }
2519 count++;
2520 }
2521 }
2522out:
2523 return ret;
2524}
2525
2526static inline int
2527__ip_vs_get_dest_entries(struct net *net, const struct ip_vs_get_dests *get,
2528 struct ip_vs_get_dests __user *uptr)
2529{
2530 struct ip_vs_service *svc;
2531 union nf_inet_addr addr = { .ip = get->addr };
2532 int ret = 0;
2533
2534 rcu_read_lock();
2535 if (get->fwmark)
2536 svc = __ip_vs_svc_fwm_find(net, AF_INET, get->fwmark);
2537 else
2538 svc = __ip_vs_service_find(net, AF_INET, get->protocol, &addr,
2539 get->port);
2540 rcu_read_unlock();
2541
2542 if (svc) {
2543 int count = 0;
2544 struct ip_vs_dest *dest;
2545 struct ip_vs_dest_entry entry;
2546
2547 memset(&entry, 0, sizeof(entry));
2548 list_for_each_entry(dest, &svc->destinations, n_list) {
2549 if (count >= get->num_dests)
2550 break;
2551
2552 entry.addr = dest->addr.ip;
2553 entry.port = dest->port;
2554 entry.conn_flags = atomic_read(&dest->conn_flags);
2555 entry.weight = atomic_read(&dest->weight);
2556 entry.u_threshold = dest->u_threshold;
2557 entry.l_threshold = dest->l_threshold;
2558 entry.activeconns = atomic_read(&dest->activeconns);
2559 entry.inactconns = atomic_read(&dest->inactconns);
2560 entry.persistconns = atomic_read(&dest->persistconns);
2561 ip_vs_copy_stats(&entry.stats, &dest->stats);
2562 if (copy_to_user(&uptr->entrytable[count],
2563 &entry, sizeof(entry))) {
2564 ret = -EFAULT;
2565 break;
2566 }
2567 count++;
2568 }
2569 } else
2570 ret = -ESRCH;
2571 return ret;
2572}
2573
2574static inline void
2575__ip_vs_get_timeouts(struct net *net, struct ip_vs_timeout_user *u)
2576{
2577#if defined(CONFIG_IP_VS_PROTO_TCP) || defined(CONFIG_IP_VS_PROTO_UDP)
2578 struct ip_vs_proto_data *pd;
2579#endif
2580
2581 memset(u, 0, sizeof (*u));
2582
2583#ifdef CONFIG_IP_VS_PROTO_TCP
2584 pd = ip_vs_proto_data_get(net, IPPROTO_TCP);
2585 u->tcp_timeout = pd->timeout_table[IP_VS_TCP_S_ESTABLISHED] / HZ;
2586 u->tcp_fin_timeout = pd->timeout_table[IP_VS_TCP_S_FIN_WAIT] / HZ;
2587#endif
2588#ifdef CONFIG_IP_VS_PROTO_UDP
2589 pd = ip_vs_proto_data_get(net, IPPROTO_UDP);
2590 u->udp_timeout =
2591 pd->timeout_table[IP_VS_UDP_S_NORMAL] / HZ;
2592#endif
2593}
2594
2595
2596#define GET_CMDID(cmd) (cmd - IP_VS_BASE_CTL)
2597#define GET_INFO_ARG_LEN (sizeof(struct ip_vs_getinfo))
2598#define GET_SERVICES_ARG_LEN (sizeof(struct ip_vs_get_services))
2599#define GET_SERVICE_ARG_LEN (sizeof(struct ip_vs_service_entry))
2600#define GET_DESTS_ARG_LEN (sizeof(struct ip_vs_get_dests))
2601#define GET_TIMEOUT_ARG_LEN (sizeof(struct ip_vs_timeout_user))
2602#define GET_DAEMON_ARG_LEN (sizeof(struct ip_vs_daemon_user) * 2)
2603
2604static const unsigned char get_arglen[GET_CMDID(IP_VS_SO_GET_MAX)+1] = {
2605 [GET_CMDID(IP_VS_SO_GET_VERSION)] = 64,
2606 [GET_CMDID(IP_VS_SO_GET_INFO)] = GET_INFO_ARG_LEN,
2607 [GET_CMDID(IP_VS_SO_GET_SERVICES)] = GET_SERVICES_ARG_LEN,
2608 [GET_CMDID(IP_VS_SO_GET_SERVICE)] = GET_SERVICE_ARG_LEN,
2609 [GET_CMDID(IP_VS_SO_GET_DESTS)] = GET_DESTS_ARG_LEN,
2610 [GET_CMDID(IP_VS_SO_GET_TIMEOUT)] = GET_TIMEOUT_ARG_LEN,
2611 [GET_CMDID(IP_VS_SO_GET_DAEMON)] = GET_DAEMON_ARG_LEN,
2612};
2613
2614static int
2615do_ip_vs_get_ctl(struct sock *sk, int cmd, void __user *user, int *len)
2616{
2617 unsigned char arg[128];
2618 int ret = 0;
2619 unsigned int copylen;
2620 struct net *net = sock_net(sk);
2621 struct netns_ipvs *ipvs = net_ipvs(net);
2622
2623 BUG_ON(!net);
2624 if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
2625 return -EPERM;
2626
2627 if (cmd < IP_VS_BASE_CTL || cmd > IP_VS_SO_GET_MAX)
2628 return -EINVAL;
2629
2630 if (*len < get_arglen[GET_CMDID(cmd)]) {
2631 pr_err("get_ctl: len %u < %u\n",
2632 *len, get_arglen[GET_CMDID(cmd)]);
2633 return -EINVAL;
2634 }
2635
2636 copylen = get_arglen[GET_CMDID(cmd)];
2637 if (copylen > 128)
2638 return -EINVAL;
2639
2640 if (copy_from_user(arg, user, copylen) != 0)
2641 return -EFAULT;
2642 /*
2643 * Handle daemons first since it has its own locking
2644 */
2645 if (cmd == IP_VS_SO_GET_DAEMON) {
2646 struct ip_vs_daemon_user d[2];
2647
2648 memset(&d, 0, sizeof(d));
2649 if (mutex_lock_interruptible(&ipvs->sync_mutex))
2650 return -ERESTARTSYS;
2651
2652 if (ipvs->sync_state & IP_VS_STATE_MASTER) {
2653 d[0].state = IP_VS_STATE_MASTER;
2654 strlcpy(d[0].mcast_ifn, ipvs->master_mcast_ifn,
2655 sizeof(d[0].mcast_ifn));
2656 d[0].syncid = ipvs->master_syncid;
2657 }
2658 if (ipvs->sync_state & IP_VS_STATE_BACKUP) {
2659 d[1].state = IP_VS_STATE_BACKUP;
2660 strlcpy(d[1].mcast_ifn, ipvs->backup_mcast_ifn,
2661 sizeof(d[1].mcast_ifn));
2662 d[1].syncid = ipvs->backup_syncid;
2663 }
2664 if (copy_to_user(user, &d, sizeof(d)) != 0)
2665 ret = -EFAULT;
2666 mutex_unlock(&ipvs->sync_mutex);
2667 return ret;
2668 }
2669
2670 if (mutex_lock_interruptible(&__ip_vs_mutex))
2671 return -ERESTARTSYS;
2672
2673 switch (cmd) {
2674 case IP_VS_SO_GET_VERSION:
2675 {
2676 char buf[64];
2677
2678 sprintf(buf, "IP Virtual Server version %d.%d.%d (size=%d)",
2679 NVERSION(IP_VS_VERSION_CODE), ip_vs_conn_tab_size);
2680 if (copy_to_user(user, buf, strlen(buf)+1) != 0) {
2681 ret = -EFAULT;
2682 goto out;
2683 }
2684 *len = strlen(buf)+1;
2685 }
2686 break;
2687
2688 case IP_VS_SO_GET_INFO:
2689 {
2690 struct ip_vs_getinfo info;
2691 info.version = IP_VS_VERSION_CODE;
2692 info.size = ip_vs_conn_tab_size;
2693 info.num_services = ipvs->num_services;
2694 if (copy_to_user(user, &info, sizeof(info)) != 0)
2695 ret = -EFAULT;
2696 }
2697 break;
2698
2699 case IP_VS_SO_GET_SERVICES:
2700 {
2701 struct ip_vs_get_services *get;
2702 int size;
2703
2704 get = (struct ip_vs_get_services *)arg;
2705 size = sizeof(*get) +
2706 sizeof(struct ip_vs_service_entry) * get->num_services;
2707 if (*len != size) {
2708 pr_err("length: %u != %u\n", *len, size);
2709 ret = -EINVAL;
2710 goto out;
2711 }
2712 ret = __ip_vs_get_service_entries(net, get, user);
2713 }
2714 break;
2715
2716 case IP_VS_SO_GET_SERVICE:
2717 {
2718 struct ip_vs_service_entry *entry;
2719 struct ip_vs_service *svc;
2720 union nf_inet_addr addr;
2721
2722 entry = (struct ip_vs_service_entry *)arg;
2723 addr.ip = entry->addr;
2724 rcu_read_lock();
2725 if (entry->fwmark)
2726 svc = __ip_vs_svc_fwm_find(net, AF_INET, entry->fwmark);
2727 else
2728 svc = __ip_vs_service_find(net, AF_INET,
2729 entry->protocol, &addr,
2730 entry->port);
2731 rcu_read_unlock();
2732 if (svc) {
2733 ip_vs_copy_service(entry, svc);
2734 if (copy_to_user(user, entry, sizeof(*entry)) != 0)
2735 ret = -EFAULT;
2736 } else
2737 ret = -ESRCH;
2738 }
2739 break;
2740
2741 case IP_VS_SO_GET_DESTS:
2742 {
2743 struct ip_vs_get_dests *get;
2744 int size;
2745
2746 get = (struct ip_vs_get_dests *)arg;
2747 size = sizeof(*get) +
2748 sizeof(struct ip_vs_dest_entry) * get->num_dests;
2749 if (*len != size) {
2750 pr_err("length: %u != %u\n", *len, size);
2751 ret = -EINVAL;
2752 goto out;
2753 }
2754 ret = __ip_vs_get_dest_entries(net, get, user);
2755 }
2756 break;
2757
2758 case IP_VS_SO_GET_TIMEOUT:
2759 {
2760 struct ip_vs_timeout_user t;
2761
2762 __ip_vs_get_timeouts(net, &t);
2763 if (copy_to_user(user, &t, sizeof(t)) != 0)
2764 ret = -EFAULT;
2765 }
2766 break;
2767
2768 default:
2769 ret = -EINVAL;
2770 }
2771
2772out:
2773 mutex_unlock(&__ip_vs_mutex);
2774 return ret;
2775}
2776
2777
2778static struct nf_sockopt_ops ip_vs_sockopts = {
2779 .pf = PF_INET,
2780 .set_optmin = IP_VS_BASE_CTL,
2781 .set_optmax = IP_VS_SO_SET_MAX+1,
2782 .set = do_ip_vs_set_ctl,
2783 .get_optmin = IP_VS_BASE_CTL,
2784 .get_optmax = IP_VS_SO_GET_MAX+1,
2785 .get = do_ip_vs_get_ctl,
2786 .owner = THIS_MODULE,
2787};
2788
2789/*
2790 * Generic Netlink interface
2791 */
2792
2793/* IPVS genetlink family */
2794static struct genl_family ip_vs_genl_family = {
2795 .id = GENL_ID_GENERATE,
2796 .hdrsize = 0,
2797 .name = IPVS_GENL_NAME,
2798 .version = IPVS_GENL_VERSION,
2799 .maxattr = IPVS_CMD_MAX,
2800 .netnsok = true, /* Make ipvsadm to work on netns */
2801};
2802
2803/* Policy used for first-level command attributes */
2804static const struct nla_policy ip_vs_cmd_policy[IPVS_CMD_ATTR_MAX + 1] = {
2805 [IPVS_CMD_ATTR_SERVICE] = { .type = NLA_NESTED },
2806 [IPVS_CMD_ATTR_DEST] = { .type = NLA_NESTED },
2807 [IPVS_CMD_ATTR_DAEMON] = { .type = NLA_NESTED },
2808 [IPVS_CMD_ATTR_TIMEOUT_TCP] = { .type = NLA_U32 },
2809 [IPVS_CMD_ATTR_TIMEOUT_TCP_FIN] = { .type = NLA_U32 },
2810 [IPVS_CMD_ATTR_TIMEOUT_UDP] = { .type = NLA_U32 },
2811};
2812
2813/* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DAEMON */
2814static const struct nla_policy ip_vs_daemon_policy[IPVS_DAEMON_ATTR_MAX + 1] = {
2815 [IPVS_DAEMON_ATTR_STATE] = { .type = NLA_U32 },
2816 [IPVS_DAEMON_ATTR_MCAST_IFN] = { .type = NLA_NUL_STRING,
2817 .len = IP_VS_IFNAME_MAXLEN },
2818 [IPVS_DAEMON_ATTR_SYNC_ID] = { .type = NLA_U32 },
2819};
2820
2821/* Policy used for attributes in nested attribute IPVS_CMD_ATTR_SERVICE */
2822static const struct nla_policy ip_vs_svc_policy[IPVS_SVC_ATTR_MAX + 1] = {
2823 [IPVS_SVC_ATTR_AF] = { .type = NLA_U16 },
2824 [IPVS_SVC_ATTR_PROTOCOL] = { .type = NLA_U16 },
2825 [IPVS_SVC_ATTR_ADDR] = { .type = NLA_BINARY,
2826 .len = sizeof(union nf_inet_addr) },
2827 [IPVS_SVC_ATTR_PORT] = { .type = NLA_U16 },
2828 [IPVS_SVC_ATTR_FWMARK] = { .type = NLA_U32 },
2829 [IPVS_SVC_ATTR_SCHED_NAME] = { .type = NLA_NUL_STRING,
2830 .len = IP_VS_SCHEDNAME_MAXLEN },
2831 [IPVS_SVC_ATTR_PE_NAME] = { .type = NLA_NUL_STRING,
2832 .len = IP_VS_PENAME_MAXLEN },
2833 [IPVS_SVC_ATTR_FLAGS] = { .type = NLA_BINARY,
2834 .len = sizeof(struct ip_vs_flags) },
2835 [IPVS_SVC_ATTR_TIMEOUT] = { .type = NLA_U32 },
2836 [IPVS_SVC_ATTR_NETMASK] = { .type = NLA_U32 },
2837 [IPVS_SVC_ATTR_STATS] = { .type = NLA_NESTED },
2838};
2839
2840/* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DEST */
2841static const struct nla_policy ip_vs_dest_policy[IPVS_DEST_ATTR_MAX + 1] = {
2842 [IPVS_DEST_ATTR_ADDR] = { .type = NLA_BINARY,
2843 .len = sizeof(union nf_inet_addr) },
2844 [IPVS_DEST_ATTR_PORT] = { .type = NLA_U16 },
2845 [IPVS_DEST_ATTR_FWD_METHOD] = { .type = NLA_U32 },
2846 [IPVS_DEST_ATTR_WEIGHT] = { .type = NLA_U32 },
2847 [IPVS_DEST_ATTR_U_THRESH] = { .type = NLA_U32 },
2848 [IPVS_DEST_ATTR_L_THRESH] = { .type = NLA_U32 },
2849 [IPVS_DEST_ATTR_ACTIVE_CONNS] = { .type = NLA_U32 },
2850 [IPVS_DEST_ATTR_INACT_CONNS] = { .type = NLA_U32 },
2851 [IPVS_DEST_ATTR_PERSIST_CONNS] = { .type = NLA_U32 },
2852 [IPVS_DEST_ATTR_STATS] = { .type = NLA_NESTED },
2853};
2854
2855static int ip_vs_genl_fill_stats(struct sk_buff *skb, int container_type,
2856 struct ip_vs_stats *stats)
2857{
2858 struct ip_vs_stats_user ustats;
2859 struct nlattr *nl_stats = nla_nest_start(skb, container_type);
2860 if (!nl_stats)
2861 return -EMSGSIZE;
2862
2863 ip_vs_copy_stats(&ustats, stats);
2864
2865 if (nla_put_u32(skb, IPVS_STATS_ATTR_CONNS, ustats.conns) ||
2866 nla_put_u32(skb, IPVS_STATS_ATTR_INPKTS, ustats.inpkts) ||
2867 nla_put_u32(skb, IPVS_STATS_ATTR_OUTPKTS, ustats.outpkts) ||
2868 nla_put_u64(skb, IPVS_STATS_ATTR_INBYTES, ustats.inbytes) ||
2869 nla_put_u64(skb, IPVS_STATS_ATTR_OUTBYTES, ustats.outbytes) ||
2870 nla_put_u32(skb, IPVS_STATS_ATTR_CPS, ustats.cps) ||
2871 nla_put_u32(skb, IPVS_STATS_ATTR_INPPS, ustats.inpps) ||
2872 nla_put_u32(skb, IPVS_STATS_ATTR_OUTPPS, ustats.outpps) ||
2873 nla_put_u32(skb, IPVS_STATS_ATTR_INBPS, ustats.inbps) ||
2874 nla_put_u32(skb, IPVS_STATS_ATTR_OUTBPS, ustats.outbps))
2875 goto nla_put_failure;
2876 nla_nest_end(skb, nl_stats);
2877
2878 return 0;
2879
2880nla_put_failure:
2881 nla_nest_cancel(skb, nl_stats);
2882 return -EMSGSIZE;
2883}
2884
2885static int ip_vs_genl_fill_service(struct sk_buff *skb,
2886 struct ip_vs_service *svc)
2887{
2888 struct ip_vs_scheduler *sched;
2889 struct ip_vs_pe *pe;
2890 struct nlattr *nl_service;
2891 struct ip_vs_flags flags = { .flags = svc->flags,
2892 .mask = ~0 };
2893
2894 nl_service = nla_nest_start(skb, IPVS_CMD_ATTR_SERVICE);
2895 if (!nl_service)
2896 return -EMSGSIZE;
2897
2898 if (nla_put_u16(skb, IPVS_SVC_ATTR_AF, svc->af))
2899 goto nla_put_failure;
2900 if (svc->fwmark) {
2901 if (nla_put_u32(skb, IPVS_SVC_ATTR_FWMARK, svc->fwmark))
2902 goto nla_put_failure;
2903 } else {
2904 if (nla_put_u16(skb, IPVS_SVC_ATTR_PROTOCOL, svc->protocol) ||
2905 nla_put(skb, IPVS_SVC_ATTR_ADDR, sizeof(svc->addr), &svc->addr) ||
2906 nla_put_be16(skb, IPVS_SVC_ATTR_PORT, svc->port))
2907 goto nla_put_failure;
2908 }
2909
2910 sched = rcu_dereference_protected(svc->scheduler, 1);
2911 pe = rcu_dereference_protected(svc->pe, 1);
2912 if (nla_put_string(skb, IPVS_SVC_ATTR_SCHED_NAME, sched->name) ||
2913 (pe && nla_put_string(skb, IPVS_SVC_ATTR_PE_NAME, pe->name)) ||
2914 nla_put(skb, IPVS_SVC_ATTR_FLAGS, sizeof(flags), &flags) ||
2915 nla_put_u32(skb, IPVS_SVC_ATTR_TIMEOUT, svc->timeout / HZ) ||
2916 nla_put_be32(skb, IPVS_SVC_ATTR_NETMASK, svc->netmask))
2917 goto nla_put_failure;
2918 if (ip_vs_genl_fill_stats(skb, IPVS_SVC_ATTR_STATS, &svc->stats))
2919 goto nla_put_failure;
2920
2921 nla_nest_end(skb, nl_service);
2922
2923 return 0;
2924
2925nla_put_failure:
2926 nla_nest_cancel(skb, nl_service);
2927 return -EMSGSIZE;
2928}
2929
2930static int ip_vs_genl_dump_service(struct sk_buff *skb,
2931 struct ip_vs_service *svc,
2932 struct netlink_callback *cb)
2933{
2934 void *hdr;
2935
2936 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
2937 &ip_vs_genl_family, NLM_F_MULTI,
2938 IPVS_CMD_NEW_SERVICE);
2939 if (!hdr)
2940 return -EMSGSIZE;
2941
2942 if (ip_vs_genl_fill_service(skb, svc) < 0)
2943 goto nla_put_failure;
2944
2945 return genlmsg_end(skb, hdr);
2946
2947nla_put_failure:
2948 genlmsg_cancel(skb, hdr);
2949 return -EMSGSIZE;
2950}
2951
2952static int ip_vs_genl_dump_services(struct sk_buff *skb,
2953 struct netlink_callback *cb)
2954{
2955 int idx = 0, i;
2956 int start = cb->args[0];
2957 struct ip_vs_service *svc;
2958 struct net *net = skb_sknet(skb);
2959
2960 mutex_lock(&__ip_vs_mutex);
2961 for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) {
2962 hlist_for_each_entry(svc, &ip_vs_svc_table[i], s_list) {
2963 if (++idx <= start || !net_eq(svc->net, net))
2964 continue;
2965 if (ip_vs_genl_dump_service(skb, svc, cb) < 0) {
2966 idx--;
2967 goto nla_put_failure;
2968 }
2969 }
2970 }
2971
2972 for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) {
2973 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[i], f_list) {
2974 if (++idx <= start || !net_eq(svc->net, net))
2975 continue;
2976 if (ip_vs_genl_dump_service(skb, svc, cb) < 0) {
2977 idx--;
2978 goto nla_put_failure;
2979 }
2980 }
2981 }
2982
2983nla_put_failure:
2984 mutex_unlock(&__ip_vs_mutex);
2985 cb->args[0] = idx;
2986
2987 return skb->len;
2988}
2989
2990static int ip_vs_genl_parse_service(struct net *net,
2991 struct ip_vs_service_user_kern *usvc,
2992 struct nlattr *nla, int full_entry,
2993 struct ip_vs_service **ret_svc)
2994{
2995 struct nlattr *attrs[IPVS_SVC_ATTR_MAX + 1];
2996 struct nlattr *nla_af, *nla_port, *nla_fwmark, *nla_protocol, *nla_addr;
2997 struct ip_vs_service *svc;
2998
2999 /* Parse mandatory identifying service fields first */
3000 if (nla == NULL ||
3001 nla_parse_nested(attrs, IPVS_SVC_ATTR_MAX, nla, ip_vs_svc_policy))
3002 return -EINVAL;
3003
3004 nla_af = attrs[IPVS_SVC_ATTR_AF];
3005 nla_protocol = attrs[IPVS_SVC_ATTR_PROTOCOL];
3006 nla_addr = attrs[IPVS_SVC_ATTR_ADDR];
3007 nla_port = attrs[IPVS_SVC_ATTR_PORT];
3008 nla_fwmark = attrs[IPVS_SVC_ATTR_FWMARK];
3009
3010 if (!(nla_af && (nla_fwmark || (nla_port && nla_protocol && nla_addr))))
3011 return -EINVAL;
3012
3013 memset(usvc, 0, sizeof(*usvc));
3014
3015 usvc->af = nla_get_u16(nla_af);
3016#ifdef CONFIG_IP_VS_IPV6
3017 if (usvc->af != AF_INET && usvc->af != AF_INET6)
3018#else
3019 if (usvc->af != AF_INET)
3020#endif
3021 return -EAFNOSUPPORT;
3022
3023 if (nla_fwmark) {
3024 usvc->protocol = IPPROTO_TCP;
3025 usvc->fwmark = nla_get_u32(nla_fwmark);
3026 } else {
3027 usvc->protocol = nla_get_u16(nla_protocol);
3028 nla_memcpy(&usvc->addr, nla_addr, sizeof(usvc->addr));
3029 usvc->port = nla_get_be16(nla_port);
3030 usvc->fwmark = 0;
3031 }
3032
3033 rcu_read_lock();
3034 if (usvc->fwmark)
3035 svc = __ip_vs_svc_fwm_find(net, usvc->af, usvc->fwmark);
3036 else
3037 svc = __ip_vs_service_find(net, usvc->af, usvc->protocol,
3038 &usvc->addr, usvc->port);
3039 rcu_read_unlock();
3040 *ret_svc = svc;
3041
3042 /* If a full entry was requested, check for the additional fields */
3043 if (full_entry) {
3044 struct nlattr *nla_sched, *nla_flags, *nla_pe, *nla_timeout,
3045 *nla_netmask;
3046 struct ip_vs_flags flags;
3047
3048 nla_sched = attrs[IPVS_SVC_ATTR_SCHED_NAME];
3049 nla_pe = attrs[IPVS_SVC_ATTR_PE_NAME];
3050 nla_flags = attrs[IPVS_SVC_ATTR_FLAGS];
3051 nla_timeout = attrs[IPVS_SVC_ATTR_TIMEOUT];
3052 nla_netmask = attrs[IPVS_SVC_ATTR_NETMASK];
3053
3054 if (!(nla_sched && nla_flags && nla_timeout && nla_netmask))
3055 return -EINVAL;
3056
3057 nla_memcpy(&flags, nla_flags, sizeof(flags));
3058
3059 /* prefill flags from service if it already exists */
3060 if (svc)
3061 usvc->flags = svc->flags;
3062
3063 /* set new flags from userland */
3064 usvc->flags = (usvc->flags & ~flags.mask) |
3065 (flags.flags & flags.mask);
3066 usvc->sched_name = nla_data(nla_sched);
3067 usvc->pe_name = nla_pe ? nla_data(nla_pe) : NULL;
3068 usvc->timeout = nla_get_u32(nla_timeout);
3069 usvc->netmask = nla_get_be32(nla_netmask);
3070 }
3071
3072 return 0;
3073}
3074
3075static struct ip_vs_service *ip_vs_genl_find_service(struct net *net,
3076 struct nlattr *nla)
3077{
3078 struct ip_vs_service_user_kern usvc;
3079 struct ip_vs_service *svc;
3080 int ret;
3081
3082 ret = ip_vs_genl_parse_service(net, &usvc, nla, 0, &svc);
3083 return ret ? ERR_PTR(ret) : svc;
3084}
3085
3086static int ip_vs_genl_fill_dest(struct sk_buff *skb, struct ip_vs_dest *dest)
3087{
3088 struct nlattr *nl_dest;
3089
3090 nl_dest = nla_nest_start(skb, IPVS_CMD_ATTR_DEST);
3091 if (!nl_dest)
3092 return -EMSGSIZE;
3093
3094 if (nla_put(skb, IPVS_DEST_ATTR_ADDR, sizeof(dest->addr), &dest->addr) ||
3095 nla_put_be16(skb, IPVS_DEST_ATTR_PORT, dest->port) ||
3096 nla_put_u32(skb, IPVS_DEST_ATTR_FWD_METHOD,
3097 (atomic_read(&dest->conn_flags) &
3098 IP_VS_CONN_F_FWD_MASK)) ||
3099 nla_put_u32(skb, IPVS_DEST_ATTR_WEIGHT,
3100 atomic_read(&dest->weight)) ||
3101 nla_put_u32(skb, IPVS_DEST_ATTR_U_THRESH, dest->u_threshold) ||
3102 nla_put_u32(skb, IPVS_DEST_ATTR_L_THRESH, dest->l_threshold) ||
3103 nla_put_u32(skb, IPVS_DEST_ATTR_ACTIVE_CONNS,
3104 atomic_read(&dest->activeconns)) ||
3105 nla_put_u32(skb, IPVS_DEST_ATTR_INACT_CONNS,
3106 atomic_read(&dest->inactconns)) ||
3107 nla_put_u32(skb, IPVS_DEST_ATTR_PERSIST_CONNS,
3108 atomic_read(&dest->persistconns)))
3109 goto nla_put_failure;
3110 if (ip_vs_genl_fill_stats(skb, IPVS_DEST_ATTR_STATS, &dest->stats))
3111 goto nla_put_failure;
3112
3113 nla_nest_end(skb, nl_dest);
3114
3115 return 0;
3116
3117nla_put_failure:
3118 nla_nest_cancel(skb, nl_dest);
3119 return -EMSGSIZE;
3120}
3121
3122static int ip_vs_genl_dump_dest(struct sk_buff *skb, struct ip_vs_dest *dest,
3123 struct netlink_callback *cb)
3124{
3125 void *hdr;
3126
3127 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3128 &ip_vs_genl_family, NLM_F_MULTI,
3129 IPVS_CMD_NEW_DEST);
3130 if (!hdr)
3131 return -EMSGSIZE;
3132
3133 if (ip_vs_genl_fill_dest(skb, dest) < 0)
3134 goto nla_put_failure;
3135
3136 return genlmsg_end(skb, hdr);
3137
3138nla_put_failure:
3139 genlmsg_cancel(skb, hdr);
3140 return -EMSGSIZE;
3141}
3142
3143static int ip_vs_genl_dump_dests(struct sk_buff *skb,
3144 struct netlink_callback *cb)
3145{
3146 int idx = 0;
3147 int start = cb->args[0];
3148 struct ip_vs_service *svc;
3149 struct ip_vs_dest *dest;
3150 struct nlattr *attrs[IPVS_CMD_ATTR_MAX + 1];
3151 struct net *net = skb_sknet(skb);
3152
3153 mutex_lock(&__ip_vs_mutex);
3154
3155 /* Try to find the service for which to dump destinations */
3156 if (nlmsg_parse(cb->nlh, GENL_HDRLEN, attrs,
3157 IPVS_CMD_ATTR_MAX, ip_vs_cmd_policy))
3158 goto out_err;
3159
3160
3161 svc = ip_vs_genl_find_service(net, attrs[IPVS_CMD_ATTR_SERVICE]);
3162 if (IS_ERR(svc) || svc == NULL)
3163 goto out_err;
3164
3165 /* Dump the destinations */
3166 list_for_each_entry(dest, &svc->destinations, n_list) {
3167 if (++idx <= start)
3168 continue;
3169 if (ip_vs_genl_dump_dest(skb, dest, cb) < 0) {
3170 idx--;
3171 goto nla_put_failure;
3172 }
3173 }
3174
3175nla_put_failure:
3176 cb->args[0] = idx;
3177
3178out_err:
3179 mutex_unlock(&__ip_vs_mutex);
3180
3181 return skb->len;
3182}
3183
3184static int ip_vs_genl_parse_dest(struct ip_vs_dest_user_kern *udest,
3185 struct nlattr *nla, int full_entry)
3186{
3187 struct nlattr *attrs[IPVS_DEST_ATTR_MAX + 1];
3188 struct nlattr *nla_addr, *nla_port;
3189
3190 /* Parse mandatory identifying destination fields first */
3191 if (nla == NULL ||
3192 nla_parse_nested(attrs, IPVS_DEST_ATTR_MAX, nla, ip_vs_dest_policy))
3193 return -EINVAL;
3194
3195 nla_addr = attrs[IPVS_DEST_ATTR_ADDR];
3196 nla_port = attrs[IPVS_DEST_ATTR_PORT];
3197
3198 if (!(nla_addr && nla_port))
3199 return -EINVAL;
3200
3201 memset(udest, 0, sizeof(*udest));
3202
3203 nla_memcpy(&udest->addr, nla_addr, sizeof(udest->addr));
3204 udest->port = nla_get_be16(nla_port);
3205
3206 /* If a full entry was requested, check for the additional fields */
3207 if (full_entry) {
3208 struct nlattr *nla_fwd, *nla_weight, *nla_u_thresh,
3209 *nla_l_thresh;
3210
3211 nla_fwd = attrs[IPVS_DEST_ATTR_FWD_METHOD];
3212 nla_weight = attrs[IPVS_DEST_ATTR_WEIGHT];
3213 nla_u_thresh = attrs[IPVS_DEST_ATTR_U_THRESH];
3214 nla_l_thresh = attrs[IPVS_DEST_ATTR_L_THRESH];
3215
3216 if (!(nla_fwd && nla_weight && nla_u_thresh && nla_l_thresh))
3217 return -EINVAL;
3218
3219 udest->conn_flags = nla_get_u32(nla_fwd)
3220 & IP_VS_CONN_F_FWD_MASK;
3221 udest->weight = nla_get_u32(nla_weight);
3222 udest->u_threshold = nla_get_u32(nla_u_thresh);
3223 udest->l_threshold = nla_get_u32(nla_l_thresh);
3224 }
3225
3226 return 0;
3227}
3228
3229static int ip_vs_genl_fill_daemon(struct sk_buff *skb, __u32 state,
3230 const char *mcast_ifn, __u32 syncid)
3231{
3232 struct nlattr *nl_daemon;
3233
3234 nl_daemon = nla_nest_start(skb, IPVS_CMD_ATTR_DAEMON);
3235 if (!nl_daemon)
3236 return -EMSGSIZE;
3237
3238 if (nla_put_u32(skb, IPVS_DAEMON_ATTR_STATE, state) ||
3239 nla_put_string(skb, IPVS_DAEMON_ATTR_MCAST_IFN, mcast_ifn) ||
3240 nla_put_u32(skb, IPVS_DAEMON_ATTR_SYNC_ID, syncid))
3241 goto nla_put_failure;
3242 nla_nest_end(skb, nl_daemon);
3243
3244 return 0;
3245
3246nla_put_failure:
3247 nla_nest_cancel(skb, nl_daemon);
3248 return -EMSGSIZE;
3249}
3250
3251static int ip_vs_genl_dump_daemon(struct sk_buff *skb, __u32 state,
3252 const char *mcast_ifn, __u32 syncid,
3253 struct netlink_callback *cb)
3254{
3255 void *hdr;
3256 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3257 &ip_vs_genl_family, NLM_F_MULTI,
3258 IPVS_CMD_NEW_DAEMON);
3259 if (!hdr)
3260 return -EMSGSIZE;
3261
3262 if (ip_vs_genl_fill_daemon(skb, state, mcast_ifn, syncid))
3263 goto nla_put_failure;
3264
3265 return genlmsg_end(skb, hdr);
3266
3267nla_put_failure:
3268 genlmsg_cancel(skb, hdr);
3269 return -EMSGSIZE;
3270}
3271
3272static int ip_vs_genl_dump_daemons(struct sk_buff *skb,
3273 struct netlink_callback *cb)
3274{
3275 struct net *net = skb_sknet(skb);
3276 struct netns_ipvs *ipvs = net_ipvs(net);
3277
3278 mutex_lock(&ipvs->sync_mutex);
3279 if ((ipvs->sync_state & IP_VS_STATE_MASTER) && !cb->args[0]) {
3280 if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_MASTER,
3281 ipvs->master_mcast_ifn,
3282 ipvs->master_syncid, cb) < 0)
3283 goto nla_put_failure;
3284
3285 cb->args[0] = 1;
3286 }
3287
3288 if ((ipvs->sync_state & IP_VS_STATE_BACKUP) && !cb->args[1]) {
3289 if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_BACKUP,
3290 ipvs->backup_mcast_ifn,
3291 ipvs->backup_syncid, cb) < 0)
3292 goto nla_put_failure;
3293
3294 cb->args[1] = 1;
3295 }
3296
3297nla_put_failure:
3298 mutex_unlock(&ipvs->sync_mutex);
3299
3300 return skb->len;
3301}
3302
3303static int ip_vs_genl_new_daemon(struct net *net, struct nlattr **attrs)
3304{
3305 if (!(attrs[IPVS_DAEMON_ATTR_STATE] &&
3306 attrs[IPVS_DAEMON_ATTR_MCAST_IFN] &&
3307 attrs[IPVS_DAEMON_ATTR_SYNC_ID]))
3308 return -EINVAL;
3309
3310 return start_sync_thread(net,
3311 nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]),
3312 nla_data(attrs[IPVS_DAEMON_ATTR_MCAST_IFN]),
3313 nla_get_u32(attrs[IPVS_DAEMON_ATTR_SYNC_ID]));
3314}
3315
3316static int ip_vs_genl_del_daemon(struct net *net, struct nlattr **attrs)
3317{
3318 if (!attrs[IPVS_DAEMON_ATTR_STATE])
3319 return -EINVAL;
3320
3321 return stop_sync_thread(net,
3322 nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]));
3323}
3324
3325static int ip_vs_genl_set_config(struct net *net, struct nlattr **attrs)
3326{
3327 struct ip_vs_timeout_user t;
3328
3329 __ip_vs_get_timeouts(net, &t);
3330
3331 if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP])
3332 t.tcp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP]);
3333
3334 if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN])
3335 t.tcp_fin_timeout =
3336 nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN]);
3337
3338 if (attrs[IPVS_CMD_ATTR_TIMEOUT_UDP])
3339 t.udp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_UDP]);
3340
3341 return ip_vs_set_timeout(net, &t);
3342}
3343
3344static int ip_vs_genl_set_daemon(struct sk_buff *skb, struct genl_info *info)
3345{
3346 int ret = 0, cmd;
3347 struct net *net;
3348 struct netns_ipvs *ipvs;
3349
3350 net = skb_sknet(skb);
3351 ipvs = net_ipvs(net);
3352 cmd = info->genlhdr->cmd;
3353
3354 if (cmd == IPVS_CMD_NEW_DAEMON || cmd == IPVS_CMD_DEL_DAEMON) {
3355 struct nlattr *daemon_attrs[IPVS_DAEMON_ATTR_MAX + 1];
3356
3357 mutex_lock(&ipvs->sync_mutex);
3358 if (!info->attrs[IPVS_CMD_ATTR_DAEMON] ||
3359 nla_parse_nested(daemon_attrs, IPVS_DAEMON_ATTR_MAX,
3360 info->attrs[IPVS_CMD_ATTR_DAEMON],
3361 ip_vs_daemon_policy)) {
3362 ret = -EINVAL;
3363 goto out;
3364 }
3365
3366 if (cmd == IPVS_CMD_NEW_DAEMON)
3367 ret = ip_vs_genl_new_daemon(net, daemon_attrs);
3368 else
3369 ret = ip_vs_genl_del_daemon(net, daemon_attrs);
3370out:
3371 mutex_unlock(&ipvs->sync_mutex);
3372 }
3373 return ret;
3374}
3375
3376static int ip_vs_genl_set_cmd(struct sk_buff *skb, struct genl_info *info)
3377{
3378 struct ip_vs_service *svc = NULL;
3379 struct ip_vs_service_user_kern usvc;
3380 struct ip_vs_dest_user_kern udest;
3381 int ret = 0, cmd;
3382 int need_full_svc = 0, need_full_dest = 0;
3383 struct net *net;
3384
3385 net = skb_sknet(skb);
3386 cmd = info->genlhdr->cmd;
3387
3388 mutex_lock(&__ip_vs_mutex);
3389
3390 if (cmd == IPVS_CMD_FLUSH) {
3391 ret = ip_vs_flush(net, false);
3392 goto out;
3393 } else if (cmd == IPVS_CMD_SET_CONFIG) {
3394 ret = ip_vs_genl_set_config(net, info->attrs);
3395 goto out;
3396 } else if (cmd == IPVS_CMD_ZERO &&
3397 !info->attrs[IPVS_CMD_ATTR_SERVICE]) {
3398 ret = ip_vs_zero_all(net);
3399 goto out;
3400 }
3401
3402 /* All following commands require a service argument, so check if we
3403 * received a valid one. We need a full service specification when
3404 * adding / editing a service. Only identifying members otherwise. */
3405 if (cmd == IPVS_CMD_NEW_SERVICE || cmd == IPVS_CMD_SET_SERVICE)
3406 need_full_svc = 1;
3407
3408 ret = ip_vs_genl_parse_service(net, &usvc,
3409 info->attrs[IPVS_CMD_ATTR_SERVICE],
3410 need_full_svc, &svc);
3411 if (ret)
3412 goto out;
3413
3414 /* Unless we're adding a new service, the service must already exist */
3415 if ((cmd != IPVS_CMD_NEW_SERVICE) && (svc == NULL)) {
3416 ret = -ESRCH;
3417 goto out;
3418 }
3419
3420 /* Destination commands require a valid destination argument. For
3421 * adding / editing a destination, we need a full destination
3422 * specification. */
3423 if (cmd == IPVS_CMD_NEW_DEST || cmd == IPVS_CMD_SET_DEST ||
3424 cmd == IPVS_CMD_DEL_DEST) {
3425 if (cmd != IPVS_CMD_DEL_DEST)
3426 need_full_dest = 1;
3427
3428 ret = ip_vs_genl_parse_dest(&udest,
3429 info->attrs[IPVS_CMD_ATTR_DEST],
3430 need_full_dest);
3431 if (ret)
3432 goto out;
3433 }
3434
3435 switch (cmd) {
3436 case IPVS_CMD_NEW_SERVICE:
3437 if (svc == NULL)
3438 ret = ip_vs_add_service(net, &usvc, &svc);
3439 else
3440 ret = -EEXIST;
3441 break;
3442 case IPVS_CMD_SET_SERVICE:
3443 ret = ip_vs_edit_service(svc, &usvc);
3444 break;
3445 case IPVS_CMD_DEL_SERVICE:
3446 ret = ip_vs_del_service(svc);
3447 /* do not use svc, it can be freed */
3448 break;
3449 case IPVS_CMD_NEW_DEST:
3450 ret = ip_vs_add_dest(svc, &udest);
3451 break;
3452 case IPVS_CMD_SET_DEST:
3453 ret = ip_vs_edit_dest(svc, &udest);
3454 break;
3455 case IPVS_CMD_DEL_DEST:
3456 ret = ip_vs_del_dest(svc, &udest);
3457 break;
3458 case IPVS_CMD_ZERO:
3459 ret = ip_vs_zero_service(svc);
3460 break;
3461 default:
3462 ret = -EINVAL;
3463 }
3464
3465out:
3466 mutex_unlock(&__ip_vs_mutex);
3467
3468 return ret;
3469}
3470
3471static int ip_vs_genl_get_cmd(struct sk_buff *skb, struct genl_info *info)
3472{
3473 struct sk_buff *msg;
3474 void *reply;
3475 int ret, cmd, reply_cmd;
3476 struct net *net;
3477
3478 net = skb_sknet(skb);
3479 cmd = info->genlhdr->cmd;
3480
3481 if (cmd == IPVS_CMD_GET_SERVICE)
3482 reply_cmd = IPVS_CMD_NEW_SERVICE;
3483 else if (cmd == IPVS_CMD_GET_INFO)
3484 reply_cmd = IPVS_CMD_SET_INFO;
3485 else if (cmd == IPVS_CMD_GET_CONFIG)
3486 reply_cmd = IPVS_CMD_SET_CONFIG;
3487 else {
3488 pr_err("unknown Generic Netlink command\n");
3489 return -EINVAL;
3490 }
3491
3492 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3493 if (!msg)
3494 return -ENOMEM;
3495
3496 mutex_lock(&__ip_vs_mutex);
3497
3498 reply = genlmsg_put_reply(msg, info, &ip_vs_genl_family, 0, reply_cmd);
3499 if (reply == NULL)
3500 goto nla_put_failure;
3501
3502 switch (cmd) {
3503 case IPVS_CMD_GET_SERVICE:
3504 {
3505 struct ip_vs_service *svc;
3506
3507 svc = ip_vs_genl_find_service(net,
3508 info->attrs[IPVS_CMD_ATTR_SERVICE]);
3509 if (IS_ERR(svc)) {
3510 ret = PTR_ERR(svc);
3511 goto out_err;
3512 } else if (svc) {
3513 ret = ip_vs_genl_fill_service(msg, svc);
3514 if (ret)
3515 goto nla_put_failure;
3516 } else {
3517 ret = -ESRCH;
3518 goto out_err;
3519 }
3520
3521 break;
3522 }
3523
3524 case IPVS_CMD_GET_CONFIG:
3525 {
3526 struct ip_vs_timeout_user t;
3527
3528 __ip_vs_get_timeouts(net, &t);
3529#ifdef CONFIG_IP_VS_PROTO_TCP
3530 if (nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP,
3531 t.tcp_timeout) ||
3532 nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP_FIN,
3533 t.tcp_fin_timeout))
3534 goto nla_put_failure;
3535#endif
3536#ifdef CONFIG_IP_VS_PROTO_UDP
3537 if (nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_UDP, t.udp_timeout))
3538 goto nla_put_failure;
3539#endif
3540
3541 break;
3542 }
3543
3544 case IPVS_CMD_GET_INFO:
3545 if (nla_put_u32(msg, IPVS_INFO_ATTR_VERSION,
3546 IP_VS_VERSION_CODE) ||
3547 nla_put_u32(msg, IPVS_INFO_ATTR_CONN_TAB_SIZE,
3548 ip_vs_conn_tab_size))
3549 goto nla_put_failure;
3550 break;
3551 }
3552
3553 genlmsg_end(msg, reply);
3554 ret = genlmsg_reply(msg, info);
3555 goto out;
3556
3557nla_put_failure:
3558 pr_err("not enough space in Netlink message\n");
3559 ret = -EMSGSIZE;
3560
3561out_err:
3562 nlmsg_free(msg);
3563out:
3564 mutex_unlock(&__ip_vs_mutex);
3565
3566 return ret;
3567}
3568
3569
3570static const struct genl_ops ip_vs_genl_ops[] __read_mostly = {
3571 {
3572 .cmd = IPVS_CMD_NEW_SERVICE,
3573 .flags = GENL_ADMIN_PERM,
3574 .policy = ip_vs_cmd_policy,
3575 .doit = ip_vs_genl_set_cmd,
3576 },
3577 {
3578 .cmd = IPVS_CMD_SET_SERVICE,
3579 .flags = GENL_ADMIN_PERM,
3580 .policy = ip_vs_cmd_policy,
3581 .doit = ip_vs_genl_set_cmd,
3582 },
3583 {
3584 .cmd = IPVS_CMD_DEL_SERVICE,
3585 .flags = GENL_ADMIN_PERM,
3586 .policy = ip_vs_cmd_policy,
3587 .doit = ip_vs_genl_set_cmd,
3588 },
3589 {
3590 .cmd = IPVS_CMD_GET_SERVICE,
3591 .flags = GENL_ADMIN_PERM,
3592 .doit = ip_vs_genl_get_cmd,
3593 .dumpit = ip_vs_genl_dump_services,
3594 .policy = ip_vs_cmd_policy,
3595 },
3596 {
3597 .cmd = IPVS_CMD_NEW_DEST,
3598 .flags = GENL_ADMIN_PERM,
3599 .policy = ip_vs_cmd_policy,
3600 .doit = ip_vs_genl_set_cmd,
3601 },
3602 {
3603 .cmd = IPVS_CMD_SET_DEST,
3604 .flags = GENL_ADMIN_PERM,
3605 .policy = ip_vs_cmd_policy,
3606 .doit = ip_vs_genl_set_cmd,
3607 },
3608 {
3609 .cmd = IPVS_CMD_DEL_DEST,
3610 .flags = GENL_ADMIN_PERM,
3611 .policy = ip_vs_cmd_policy,
3612 .doit = ip_vs_genl_set_cmd,
3613 },
3614 {
3615 .cmd = IPVS_CMD_GET_DEST,
3616 .flags = GENL_ADMIN_PERM,
3617 .policy = ip_vs_cmd_policy,
3618 .dumpit = ip_vs_genl_dump_dests,
3619 },
3620 {
3621 .cmd = IPVS_CMD_NEW_DAEMON,
3622 .flags = GENL_ADMIN_PERM,
3623 .policy = ip_vs_cmd_policy,
3624 .doit = ip_vs_genl_set_daemon,
3625 },
3626 {
3627 .cmd = IPVS_CMD_DEL_DAEMON,
3628 .flags = GENL_ADMIN_PERM,
3629 .policy = ip_vs_cmd_policy,
3630 .doit = ip_vs_genl_set_daemon,
3631 },
3632 {
3633 .cmd = IPVS_CMD_GET_DAEMON,
3634 .flags = GENL_ADMIN_PERM,
3635 .dumpit = ip_vs_genl_dump_daemons,
3636 },
3637 {
3638 .cmd = IPVS_CMD_SET_CONFIG,
3639 .flags = GENL_ADMIN_PERM,
3640 .policy = ip_vs_cmd_policy,
3641 .doit = ip_vs_genl_set_cmd,
3642 },
3643 {
3644 .cmd = IPVS_CMD_GET_CONFIG,
3645 .flags = GENL_ADMIN_PERM,
3646 .doit = ip_vs_genl_get_cmd,
3647 },
3648 {
3649 .cmd = IPVS_CMD_GET_INFO,
3650 .flags = GENL_ADMIN_PERM,
3651 .doit = ip_vs_genl_get_cmd,
3652 },
3653 {
3654 .cmd = IPVS_CMD_ZERO,
3655 .flags = GENL_ADMIN_PERM,
3656 .policy = ip_vs_cmd_policy,
3657 .doit = ip_vs_genl_set_cmd,
3658 },
3659 {
3660 .cmd = IPVS_CMD_FLUSH,
3661 .flags = GENL_ADMIN_PERM,
3662 .doit = ip_vs_genl_set_cmd,
3663 },
3664};
3665
3666static int __init ip_vs_genl_register(void)
3667{
3668 return genl_register_family_with_ops(&ip_vs_genl_family,
3669 ip_vs_genl_ops, ARRAY_SIZE(ip_vs_genl_ops));
3670}
3671
3672static void ip_vs_genl_unregister(void)
3673{
3674 genl_unregister_family(&ip_vs_genl_family);
3675}
3676
3677/* End of Generic Netlink interface definitions */
3678
3679/*
3680 * per netns intit/exit func.
3681 */
3682#ifdef CONFIG_SYSCTL
3683static int __net_init ip_vs_control_net_init_sysctl(struct net *net)
3684{
3685 int idx;
3686 struct netns_ipvs *ipvs = net_ipvs(net);
3687 struct ctl_table *tbl;
3688
3689 atomic_set(&ipvs->dropentry, 0);
3690 spin_lock_init(&ipvs->dropentry_lock);
3691 spin_lock_init(&ipvs->droppacket_lock);
3692 spin_lock_init(&ipvs->securetcp_lock);
3693
3694 if (!net_eq(net, &init_net)) {
3695 tbl = kmemdup(vs_vars, sizeof(vs_vars), GFP_KERNEL);
3696 if (tbl == NULL)
3697 return -ENOMEM;
3698
3699 /* Don't export sysctls to unprivileged users */
3700 if (net->user_ns != &init_user_ns)
3701 tbl[0].procname = NULL;
3702 } else
3703 tbl = vs_vars;
3704 /* Initialize sysctl defaults */
3705 idx = 0;
3706 ipvs->sysctl_amemthresh = 1024;
3707 tbl[idx++].data = &ipvs->sysctl_amemthresh;
3708 ipvs->sysctl_am_droprate = 10;
3709 tbl[idx++].data = &ipvs->sysctl_am_droprate;
3710 tbl[idx++].data = &ipvs->sysctl_drop_entry;
3711 tbl[idx++].data = &ipvs->sysctl_drop_packet;
3712#ifdef CONFIG_IP_VS_NFCT
3713 tbl[idx++].data = &ipvs->sysctl_conntrack;
3714#endif
3715 tbl[idx++].data = &ipvs->sysctl_secure_tcp;
3716 ipvs->sysctl_snat_reroute = 1;
3717 tbl[idx++].data = &ipvs->sysctl_snat_reroute;
3718 ipvs->sysctl_sync_ver = 1;
3719 tbl[idx++].data = &ipvs->sysctl_sync_ver;
3720 ipvs->sysctl_sync_ports = 1;
3721 tbl[idx++].data = &ipvs->sysctl_sync_ports;
3722 tbl[idx++].data = &ipvs->sysctl_sync_persist_mode;
3723 ipvs->sysctl_sync_qlen_max = nr_free_buffer_pages() / 32;
3724 tbl[idx++].data = &ipvs->sysctl_sync_qlen_max;
3725 ipvs->sysctl_sync_sock_size = 0;
3726 tbl[idx++].data = &ipvs->sysctl_sync_sock_size;
3727 tbl[idx++].data = &ipvs->sysctl_cache_bypass;
3728 tbl[idx++].data = &ipvs->sysctl_expire_nodest_conn;
3729 tbl[idx++].data = &ipvs->sysctl_sloppy_tcp;
3730 tbl[idx++].data = &ipvs->sysctl_sloppy_sctp;
3731 tbl[idx++].data = &ipvs->sysctl_expire_quiescent_template;
3732 ipvs->sysctl_sync_threshold[0] = DEFAULT_SYNC_THRESHOLD;
3733 ipvs->sysctl_sync_threshold[1] = DEFAULT_SYNC_PERIOD;
3734 tbl[idx].data = &ipvs->sysctl_sync_threshold;
3735 tbl[idx++].maxlen = sizeof(ipvs->sysctl_sync_threshold);
3736 ipvs->sysctl_sync_refresh_period = DEFAULT_SYNC_REFRESH_PERIOD;
3737 tbl[idx++].data = &ipvs->sysctl_sync_refresh_period;
3738 ipvs->sysctl_sync_retries = clamp_t(int, DEFAULT_SYNC_RETRIES, 0, 3);
3739 tbl[idx++].data = &ipvs->sysctl_sync_retries;
3740 tbl[idx++].data = &ipvs->sysctl_nat_icmp_send;
3741 ipvs->sysctl_pmtu_disc = 1;
3742 tbl[idx++].data = &ipvs->sysctl_pmtu_disc;
3743 tbl[idx++].data = &ipvs->sysctl_backup_only;
3744
3745
3746 ipvs->sysctl_hdr = register_net_sysctl(net, "net/ipv4/vs", tbl);
3747 if (ipvs->sysctl_hdr == NULL) {
3748 if (!net_eq(net, &init_net))
3749 kfree(tbl);
3750 return -ENOMEM;
3751 }
3752 ip_vs_start_estimator(net, &ipvs->tot_stats);
3753 ipvs->sysctl_tbl = tbl;
3754 /* Schedule defense work */
3755 INIT_DELAYED_WORK(&ipvs->defense_work, defense_work_handler);
3756 schedule_delayed_work(&ipvs->defense_work, DEFENSE_TIMER_PERIOD);
3757
3758 return 0;
3759}
3760
3761static void __net_exit ip_vs_control_net_cleanup_sysctl(struct net *net)
3762{
3763 struct netns_ipvs *ipvs = net_ipvs(net);
3764
3765 cancel_delayed_work_sync(&ipvs->defense_work);
3766 cancel_work_sync(&ipvs->defense_work.work);
3767 unregister_net_sysctl_table(ipvs->sysctl_hdr);
3768}
3769
3770#else
3771
3772static int __net_init ip_vs_control_net_init_sysctl(struct net *net) { return 0; }
3773static void __net_exit ip_vs_control_net_cleanup_sysctl(struct net *net) { }
3774
3775#endif
3776
3777static struct notifier_block ip_vs_dst_notifier = {
3778 .notifier_call = ip_vs_dst_event,
3779};
3780
3781int __net_init ip_vs_control_net_init(struct net *net)
3782{
3783 int idx;
3784 struct netns_ipvs *ipvs = net_ipvs(net);
3785
3786 /* Initialize rs_table */
3787 for (idx = 0; idx < IP_VS_RTAB_SIZE; idx++)
3788 INIT_HLIST_HEAD(&ipvs->rs_table[idx]);
3789
3790 INIT_LIST_HEAD(&ipvs->dest_trash);
3791 spin_lock_init(&ipvs->dest_trash_lock);
3792 setup_timer(&ipvs->dest_trash_timer, ip_vs_dest_trash_expire,
3793 (unsigned long) net);
3794 atomic_set(&ipvs->ftpsvc_counter, 0);
3795 atomic_set(&ipvs->nullsvc_counter, 0);
3796
3797 /* procfs stats */
3798 ipvs->tot_stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
3799 if (!ipvs->tot_stats.cpustats)
3800 return -ENOMEM;
3801
3802 spin_lock_init(&ipvs->tot_stats.lock);
3803
3804 proc_create("ip_vs", 0, net->proc_net, &ip_vs_info_fops);
3805 proc_create("ip_vs_stats", 0, net->proc_net, &ip_vs_stats_fops);
3806 proc_create("ip_vs_stats_percpu", 0, net->proc_net,
3807 &ip_vs_stats_percpu_fops);
3808
3809 if (ip_vs_control_net_init_sysctl(net))
3810 goto err;
3811
3812 return 0;
3813
3814err:
3815 free_percpu(ipvs->tot_stats.cpustats);
3816 return -ENOMEM;
3817}
3818
3819void __net_exit ip_vs_control_net_cleanup(struct net *net)
3820{
3821 struct netns_ipvs *ipvs = net_ipvs(net);
3822
3823 ip_vs_trash_cleanup(net);
3824 ip_vs_stop_estimator(net, &ipvs->tot_stats);
3825 ip_vs_control_net_cleanup_sysctl(net);
3826 remove_proc_entry("ip_vs_stats_percpu", net->proc_net);
3827 remove_proc_entry("ip_vs_stats", net->proc_net);
3828 remove_proc_entry("ip_vs", net->proc_net);
3829 free_percpu(ipvs->tot_stats.cpustats);
3830}
3831
3832int __init ip_vs_register_nl_ioctl(void)
3833{
3834 int ret;
3835
3836 ret = nf_register_sockopt(&ip_vs_sockopts);
3837 if (ret) {
3838 pr_err("cannot register sockopt.\n");
3839 goto err_sock;
3840 }
3841
3842 ret = ip_vs_genl_register();
3843 if (ret) {
3844 pr_err("cannot register Generic Netlink interface.\n");
3845 goto err_genl;
3846 }
3847 return 0;
3848
3849err_genl:
3850 nf_unregister_sockopt(&ip_vs_sockopts);
3851err_sock:
3852 return ret;
3853}
3854
3855void ip_vs_unregister_nl_ioctl(void)
3856{
3857 ip_vs_genl_unregister();
3858 nf_unregister_sockopt(&ip_vs_sockopts);
3859}
3860
3861int __init ip_vs_control_init(void)
3862{
3863 int idx;
3864 int ret;
3865
3866 EnterFunction(2);
3867
3868 /* Initialize svc_table, ip_vs_svc_fwm_table */
3869 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
3870 INIT_HLIST_HEAD(&ip_vs_svc_table[idx]);
3871 INIT_HLIST_HEAD(&ip_vs_svc_fwm_table[idx]);
3872 }
3873
3874 smp_wmb(); /* Do we really need it now ? */
3875
3876 ret = register_netdevice_notifier(&ip_vs_dst_notifier);
3877 if (ret < 0)
3878 return ret;
3879
3880 LeaveFunction(2);
3881 return 0;
3882}
3883
3884
3885void ip_vs_control_cleanup(void)
3886{
3887 EnterFunction(2);
3888 unregister_netdevice_notifier(&ip_vs_dst_notifier);
3889 LeaveFunction(2);
3890}
Linux kernel - Deliverables
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