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ipvs: Add destination address family to netlink interface
[deliverable/linux.git] / net / netfilter / ipvs / ip_vs_ctl.c
CommitLineData
1da177e4
LT		 1/*
2 * IPVS An implementation of the IP virtual server support for the
3 * LINUX operating system. IPVS is now implemented as a module
4 * over the NetFilter framework. IPVS can be used to build a
5 * high-performance and highly available server based on a
6 * cluster of servers.
7 *
1da177e4
LT		 8 * Authors: Wensong Zhang <wensong@linuxvirtualserver.org>
9 * Peter Kese <peter.kese@ijs.si>
10 * Julian Anastasov <ja@ssi.bg>
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version
15 * 2 of the License, or (at your option) any later version.
16 *
17 * Changes:
18 *
19 */
20
9aada7ac
HE		 21#define KMSG_COMPONENT "IPVS"
22#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
23
1da177e4
LT		 24#include <linux/module.h>
25#include <linux/init.h>
26#include <linux/types.h>
4fc268d2 27#include <linux/capability.h>
1da177e4
LT		 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>
1da177e4 33#include <linux/seq_file.h>
5a0e3ad6 34#include <linux/slab.h>
1da177e4
LT		 35
36#include <linux/netfilter.h>
37#include <linux/netfilter_ipv4.h>
14cc3e2b 38#include <linux/mutex.h>
1da177e4 39
457c4cbc 40#include <net/net_namespace.h>
9330419d 41#include <linux/nsproxy.h>
1da177e4 42#include <net/ip.h>
09571c7a
VB		 43#ifdef CONFIG_IP_VS_IPV6
44#include <net/ipv6.h>
45#include <net/ip6_route.h>
46#endif
14c85021 47#include <net/route.h>
1da177e4 48#include <net/sock.h>
9a812198 49#include <net/genetlink.h>
1da177e4
LT		 50
51#include <asm/uaccess.h>
52
53#include <net/ip_vs.h>
54
55/* semaphore for IPVS sockopts. And, [gs]etsockopt may sleep. */
14cc3e2b 56static DEFINE_MUTEX(__ip_vs_mutex);
1da177e4 57
1da177e4 58/* sysctl variables */
1da177e4
LT		 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
7a4f0761
HS		 69
70/* Protos */
578bc3ef 71static void __ip_vs_del_service(struct ip_vs_service *svc, bool cleanup);
7a4f0761
HS		 72
73
09571c7a
VB		 74#ifdef CONFIG_IP_VS_IPV6
75/* Taken from rt6_fill_node() in net/ipv6/route.c, is there a better way? */
c24584c0
ED		 76static bool __ip_vs_addr_is_local_v6(struct net *net,
77 const struct in6_addr *addr)
09571c7a 78{
4c9483b2
DM		 79 struct flowi6 fl6 = {
80 .daddr = *addr,
09571c7a 81 };
c24584c0
ED		 82 struct dst_entry *dst = ip6_route_output(net, NULL, &fl6);
83 bool is_local;
09571c7a 84
c24584c0 85 is_local = !dst->error && dst->dev && (dst->dev->flags & IFF_LOOPBACK);
09571c7a 86
c24584c0
ED		 87 dst_release(dst);
88 return is_local;
09571c7a
VB		 89}
90#endif
14e40546
SH		 91
92#ifdef CONFIG_SYSCTL
1da177e4 93/*
af9debd4
JA		 94 * update_defense_level is called from keventd and from sysctl,
95 * so it needs to protect itself from softirqs
1da177e4 96 */
9330419d 97static void update_defense_level(struct netns_ipvs *ipvs)
1da177e4
LT		 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
a0840e2e 113 nomem = (availmem < ipvs->sysctl_amemthresh);
1da177e4 114
af9debd4
JA		 115 local_bh_disable();
116
1da177e4 117 /* drop_entry */
a0840e2e
HS		 118 spin_lock(&ipvs->dropentry_lock);
119 switch (ipvs->sysctl_drop_entry) {
1da177e4 120 case 0:
a0840e2e 121 atomic_set(&ipvs->dropentry, 0);
1da177e4
LT		 122 break;
123 case 1:
124 if (nomem) {
a0840e2e
HS		 125 atomic_set(&ipvs->dropentry, 1);
126 ipvs->sysctl_drop_entry = 2;
1da177e4 127 } else {
a0840e2e 128 atomic_set(&ipvs->dropentry, 0);
1da177e4
LT		 129 }
130 break;
131 case 2:
132 if (nomem) {
a0840e2e 133 atomic_set(&ipvs->dropentry, 1);
1da177e4 134 } else {
a0840e2e
HS		 135 atomic_set(&ipvs->dropentry, 0);
136 ipvs->sysctl_drop_entry = 1;
1da177e4
LT		 137 };
138 break;
139 case 3:
a0840e2e 140 atomic_set(&ipvs->dropentry, 1);
1da177e4
LT		 141 break;
142 }
a0840e2e 143 spin_unlock(&ipvs->dropentry_lock);
1da177e4
LT		 144
145 /* drop_packet */
a0840e2e
HS		 146 spin_lock(&ipvs->droppacket_lock);
147 switch (ipvs->sysctl_drop_packet) {
1da177e4 148 case 0:
a0840e2e 149 ipvs->drop_rate = 0;
1da177e4
LT		 150 break;
151 case 1:
152 if (nomem) {
a0840e2e
HS		 153 ipvs->drop_rate = ipvs->drop_counter
154 = ipvs->sysctl_amemthresh /
155 (ipvs->sysctl_amemthresh-availmem);
156 ipvs->sysctl_drop_packet = 2;
1da177e4 157 } else {
a0840e2e 158 ipvs->drop_rate = 0;
1da177e4
LT		 159 }
160 break;
161 case 2:
162 if (nomem) {
a0840e2e
HS		 163 ipvs->drop_rate = ipvs->drop_counter
164 = ipvs->sysctl_amemthresh /
165 (ipvs->sysctl_amemthresh-availmem);
1da177e4 166 } else {
a0840e2e
HS		 167 ipvs->drop_rate = 0;
168 ipvs->sysctl_drop_packet = 1;
1da177e4
LT		 169 }
170 break;
171 case 3:
a0840e2e 172 ipvs->drop_rate = ipvs->sysctl_am_droprate;
1da177e4
LT		 173 break;
174 }
a0840e2e 175 spin_unlock(&ipvs->droppacket_lock);
1da177e4
LT		 176
177 /* secure_tcp */
a0840e2e
HS		 178 spin_lock(&ipvs->securetcp_lock);
179 switch (ipvs->sysctl_secure_tcp) {
1da177e4
LT		 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;
a0840e2e 188 ipvs->sysctl_secure_tcp = 2;
1da177e4
LT		 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;
a0840e2e 201 ipvs->sysctl_secure_tcp = 1;
1da177e4
LT		 202 }
203 break;
204 case 3:
205 if (old_secure_tcp < 2)
206 to_change = 1;
207 break;
208 }
a0840e2e 209 old_secure_tcp = ipvs->sysctl_secure_tcp;
1da177e4 210 if (to_change >= 0)
9330419d 211 ip_vs_protocol_timeout_change(ipvs,
a0840e2e
HS		 212 ipvs->sysctl_secure_tcp > 1);
213 spin_unlock(&ipvs->securetcp_lock);
af9debd4
JA		 214
215 local_bh_enable();
1da177e4
LT		 216}
217
218
219/*
220 * Timer for checking the defense
221 */
222#define DEFENSE_TIMER_PERIOD 1*HZ
1da177e4 223
c4028958 224static void defense_work_handler(struct work_struct *work)
1da177e4 225{
f6340ee0
HS		 226 struct netns_ipvs *ipvs =
227 container_of(work, struct netns_ipvs, defense_work.work);
9330419d
HS		 228
229 update_defense_level(ipvs);
a0840e2e 230 if (atomic_read(&ipvs->dropentry))
f6340ee0
HS		 231 ip_vs_random_dropentry(ipvs->net);
232 schedule_delayed_work(&ipvs->defense_work, DEFENSE_TIMER_PERIOD);
1da177e4 233}
14e40546 234#endif
1da177e4
LT		 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> */
ceec4c38 257static struct hlist_head ip_vs_svc_table[IP_VS_SVC_TAB_SIZE];
1da177e4 258/* the service table hashed by fwmark */
ceec4c38 259static struct hlist_head ip_vs_svc_fwm_table[IP_VS_SVC_TAB_SIZE];
1da177e4 260
1da177e4
LT		 261
262/*
263 * Returns hash value for virtual service
264 */
95c96174
ED		 265static inline unsigned int
266ip_vs_svc_hashkey(struct net *net, int af, unsigned int proto,
fc723250 267 const union nf_inet_addr *addr, __be16 port)
1da177e4 268{
95c96174 269 register unsigned int porth = ntohs(port);
b18610de 270 __be32 addr_fold = addr->ip;
e9836f24 271 __u32 ahash;
1da177e4 272
b18610de
JV		 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
e9836f24
JA		 278 ahash = ntohl(addr_fold);
279 ahash ^= ((size_t) net >> 8);
b18610de 280
e9836f24
JA		 281 return (proto ^ ahash ^ (porth >> IP_VS_SVC_TAB_BITS) ^ porth) &
282 IP_VS_SVC_TAB_MASK;
1da177e4
LT		 283}
284
285/*
286 * Returns hash value of fwmark for virtual service lookup
287 */
95c96174 288static inline unsigned int ip_vs_svc_fwm_hashkey(struct net *net, __u32 fwmark)
1da177e4 289{
fc723250 290 return (((size_t)net>>8) ^ fwmark) & IP_VS_SVC_TAB_MASK;
1da177e4
LT		 291}
292
293/*
fc723250 294 * Hashes a service in the ip_vs_svc_table by <netns,proto,addr,port>
1da177e4
LT		 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{
95c96174 300 unsigned int hash;
1da177e4
LT		 301
302 if (svc->flags & IP_VS_SVC_F_HASHED) {
1e3e238e
HE		 303 pr_err("%s(): request for already hashed, called from %pF\n",
304 __func__, __builtin_return_address(0));
1da177e4
LT		 305 return 0;
306 }
307
308 if (svc->fwmark == 0) {
309 /*
fc723250 310 * Hash it by <netns,protocol,addr,port> in ip_vs_svc_table
1da177e4 311 */
fc723250
HS		 312 hash = ip_vs_svc_hashkey(svc->net, svc->af, svc->protocol,
313 &svc->addr, svc->port);
ceec4c38 314 hlist_add_head_rcu(&svc->s_list, &ip_vs_svc_table[hash]);
1da177e4
LT		 315 } else {
316 /*
fc723250 317 * Hash it by fwmark in svc_fwm_table
1da177e4 318 */
fc723250 319 hash = ip_vs_svc_fwm_hashkey(svc->net, svc->fwmark);
ceec4c38 320 hlist_add_head_rcu(&svc->f_list, &ip_vs_svc_fwm_table[hash]);
1da177e4
LT		 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/*
fc723250 331 * Unhashes a service from svc_table / svc_fwm_table.
1da177e4
LT		 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)) {
1e3e238e
HE		 337 pr_err("%s(): request for unhash flagged, called from %pF\n",
338 __func__, __builtin_return_address(0));
1da177e4
LT		 339 return 0;
340 }
341
342 if (svc->fwmark == 0) {
fc723250 343 /* Remove it from the svc_table table */
ceec4c38 344 hlist_del_rcu(&svc->s_list);
1da177e4 345 } else {
fc723250 346 /* Remove it from the svc_fwm_table table */
ceec4c38 347 hlist_del_rcu(&svc->f_list);
1da177e4
LT		 348 }
349
350 svc->flags &= ~IP_VS_SVC_F_HASHED;
351 atomic_dec(&svc->refcnt);
352 return 1;
353}
354
355
356/*
fc723250 357 * Get service by {netns, proto,addr,port} in the service table.
1da177e4 358 */
b18610de 359static inline struct ip_vs_service *
fc723250
HS		 360__ip_vs_service_find(struct net *net, int af, __u16 protocol,
361 const union nf_inet_addr *vaddr, __be16 vport)
1da177e4 362{
95c96174 363 unsigned int hash;
1da177e4
LT		 364 struct ip_vs_service *svc;
365
366 /* Check for "full" addressed entries */
fc723250 367 hash = ip_vs_svc_hashkey(net, af, protocol, vaddr, vport);
1da177e4 368
ceec4c38 369 hlist_for_each_entry_rcu(svc, &ip_vs_svc_table[hash], s_list) {
b18610de
JV		 370 if ((svc->af == af)
371 && ip_vs_addr_equal(af, &svc->addr, vaddr)
1da177e4 372 && (svc->port == vport)
fc723250
HS		 373 && (svc->protocol == protocol)
374 && net_eq(svc->net, net)) {
1da177e4 375 /* HIT */
1da177e4
LT		 376 return svc;
377 }
378 }
379
380 return NULL;
381}
382
383
384/*
385 * Get service by {fwmark} in the service table.
386 */
b18610de 387static inline struct ip_vs_service *
fc723250 388__ip_vs_svc_fwm_find(struct net *net, int af, __u32 fwmark)
1da177e4 389{
95c96174 390 unsigned int hash;
1da177e4
LT		 391 struct ip_vs_service *svc;
392
393 /* Check for fwmark addressed entries */
fc723250 394 hash = ip_vs_svc_fwm_hashkey(net, fwmark);
1da177e4 395
ceec4c38 396 hlist_for_each_entry_rcu(svc, &ip_vs_svc_fwm_table[hash], f_list) {
fc723250
HS		 397 if (svc->fwmark == fwmark && svc->af == af
398 && net_eq(svc->net, net)) {
1da177e4 399 /* HIT */
1da177e4
LT		 400 return svc;
401 }
402 }
403
404 return NULL;
405}
406
ceec4c38 407/* Find service, called under RCU lock */
1da177e4 408struct ip_vs_service *
ceec4c38
JA		 409ip_vs_service_find(struct net *net, int af, __u32 fwmark, __u16 protocol,
410 const union nf_inet_addr *vaddr, __be16 vport)
1da177e4
LT		 411{
412 struct ip_vs_service *svc;
763f8d0e 413 struct netns_ipvs *ipvs = net_ipvs(net);
3c2e0505 414
1da177e4
LT		 415 /*
416 * Check the table hashed by fwmark first
417 */
097fc76a
JA		 418 if (fwmark) {
419 svc = __ip_vs_svc_fwm_find(net, af, fwmark);
420 if (svc)
421 goto out;
422 }
1da177e4
LT		 423
424 /*
425 * Check the table hashed by <protocol,addr,port>
426 * for "full" addressed entries
427 */
fc723250 428 svc = __ip_vs_service_find(net, af, protocol, vaddr, vport);
1da177e4
LT		 429
430 if (svc == NULL
431 && protocol == IPPROTO_TCP
763f8d0e 432 && atomic_read(&ipvs->ftpsvc_counter)
1da177e4
LT		 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 */
fc723250 438 svc = __ip_vs_service_find(net, af, protocol, vaddr, FTPPORT);
1da177e4
LT		 439 }
440
441 if (svc == NULL
763f8d0e 442 && atomic_read(&ipvs->nullsvc_counter)) {
1da177e4
LT		 443 /*
444 * Check if the catch-all port (port zero) exists
445 */
fc723250 446 svc = __ip_vs_service_find(net, af, protocol, vaddr, 0);
1da177e4
LT		 447 }
448
449 out:
3c2e0505
JV		 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");
1da177e4
LT		 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);
bcbde4c0 463 rcu_assign_pointer(dest->svc, svc);
1da177e4
LT		 464}
465
ceec4c38
JA		 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
bcbde4c0 473static void ip_vs_service_rcu_free(struct rcu_head *head)
1da177e4 474{
bcbde4c0
JA		 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}
1da177e4 480
bcbde4c0
JA		 481static void __ip_vs_svc_put(struct ip_vs_service *svc, bool do_delay)
482{
26c15cfd 483 if (atomic_dec_and_test(&svc->refcnt)) {
ceec4c38 484 IP_VS_DBG_BUF(3, "Removing service %u/%s:%u\n",
26c15cfd
JA		 485 svc->fwmark,
486 IP_VS_DBG_ADDR(svc->af, &svc->addr),
ceec4c38 487 ntohs(svc->port));
bcbde4c0
JA		 488 if (do_delay)
489 call_rcu(&svc->rcu_head, ip_vs_service_rcu_free);
490 else
491 ip_vs_service_free(svc);
26c15cfd 492 }
1da177e4
LT		 493}
494
495
496/*
497 * Returns hash value for real service
498 */
95c96174 499static inline unsigned int ip_vs_rs_hashkey(int af,
7937df15
JV		 500 const union nf_inet_addr *addr,
501 __be16 port)
1da177e4 502{
95c96174 503 register unsigned int porth = ntohs(port);
7937df15
JV		 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
1da177e4 511
7937df15 512 return (ntohl(addr_fold)^(porth>>IP_VS_RTAB_BITS)^porth)
1da177e4
LT		 513 & IP_VS_RTAB_MASK;
514}
515
276472ea
JA		 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)
1da177e4 518{
95c96174 519 unsigned int hash;
1da177e4 520
276472ea
JA		 521 if (dest->in_rs_table)
522 return;
1da177e4
LT		 523
524 /*
525 * Hash by proto,addr,port,
526 * which are the parameters of the real service.
527 */
7937df15
JV		 528 hash = ip_vs_rs_hashkey(dest->af, &dest->addr, dest->port);
529
276472ea
JA		 530 hlist_add_head_rcu(&dest->d_list, &ipvs->rs_table[hash]);
531 dest->in_rs_table = 1;
1da177e4
LT		 532}
533
276472ea
JA		 534/* Unhash ip_vs_dest from rs_table. */
535static void ip_vs_rs_unhash(struct ip_vs_dest *dest)
1da177e4
LT		 536{
537 /*
fc723250 538 * Remove it from the rs_table table.
1da177e4 539 */
276472ea
JA		 540 if (dest->in_rs_table) {
541 hlist_del_rcu(&dest->d_list);
542 dest->in_rs_table = 0;
1da177e4 543 }
1da177e4
LT		 544}
545
276472ea
JA		 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)
1da177e4 549{
fc723250 550 struct netns_ipvs *ipvs = net_ipvs(net);
95c96174 551 unsigned int hash;
1da177e4
LT		 552 struct ip_vs_dest *dest;
553
276472ea 554 /* Check for "full" addressed entries */
7937df15 555 hash = ip_vs_rs_hashkey(af, daddr, dport);
1da177e4 556
276472ea
JA		 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)) {
1da177e4 563 /* HIT */
276472ea
JA		 564 rcu_read_unlock();
565 return true;
1da177e4
LT		 566 }
567 }
276472ea 568 rcu_read_unlock();
1da177e4 569
276472ea 570 return false;
1da177e4
LT		 571}
572
413c2d04
JA		 573/* Lookup destination by {addr,port} in the given service
574 * Called under RCU lock.
1da177e4
LT		 575 */
576static struct ip_vs_dest *
7937df15
JV		 577ip_vs_lookup_dest(struct ip_vs_service *svc, const union nf_inet_addr *daddr,
578 __be16 dport)
1da177e4
LT		 579{
580 struct ip_vs_dest *dest;
581
582 /*
583 * Find the destination for the given service
584 */
413c2d04 585 list_for_each_entry_rcu(dest, &svc->destinations, n_list) {
7937df15
JV		 586 if ((dest->af == svc->af)
587 && ip_vs_addr_equal(svc->af, &dest->addr, daddr)
588 && (dest->port == dport)) {
1da177e4
LT		 589 /* HIT */
590 return dest;
591 }
592 }
593
594 return NULL;
595}
596
1e356f9c
RB		 597/*
598 * Find destination by {daddr,dport,vaddr,protocol}
413c2d04 599 * Created to be used in ip_vs_process_message() in
1e356f9c
RB		 600 * the backup synchronization daemon. It finds the
601 * destination to be bound to the received connection
602 * on the backup.
413c2d04 603 * Called under RCU lock, no refcnt is returned.
1e356f9c 604 */
fc723250
HS		 605struct ip_vs_dest *ip_vs_find_dest(struct net *net, int af,
606 const union nf_inet_addr *daddr,
7937df15
JV		 607 __be16 dport,
608 const union nf_inet_addr *vaddr,
52793dbe
JA		 609 __be16 vport, __u16 protocol, __u32 fwmark,
610 __u32 flags)
1e356f9c
RB		 611{
612 struct ip_vs_dest *dest;
613 struct ip_vs_service *svc;
52793dbe 614 __be16 port = dport;
1e356f9c 615
ceec4c38 616 svc = ip_vs_service_find(net, af, fwmark, protocol, vaddr, vport);
1e356f9c
RB		 617 if (!svc)
618 return NULL;
52793dbe
JA		 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);
1e356f9c
RB		 624 return dest;
625}
1da177e4 626
026ace06
JA		 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 */
d1deae4d
JA		 638static void __ip_vs_dst_cache_reset(struct ip_vs_dest *dest)
639{
026ace06 640 struct ip_vs_dest_dst *old;
d1deae4d 641
026ace06
JA		 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 }
d1deae4d
JA		 647}
648
1da177e4
LT		 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 *
7937df15
JV		 660ip_vs_trash_get_dest(struct ip_vs_service *svc, const union nf_inet_addr *daddr,
661 __be16 dport)
1da177e4 662{
578bc3ef 663 struct ip_vs_dest *dest;
f2431e6e 664 struct netns_ipvs *ipvs = net_ipvs(svc->net);
1da177e4
LT		 665
666 /*
667 * Find the destination in trash
668 */
578bc3ef
JA		 669 spin_lock_bh(&ipvs->dest_trash_lock);
670 list_for_each_entry(dest, &ipvs->dest_trash, t_list) {
7937df15
JV		 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) &&
1da177e4
LT		 679 dest->port == dport &&
680 dest->vfwmark == svc->fwmark &&
681 dest->protocol == svc->protocol &&
682 (svc->fwmark ||
7937df15 683 (ip_vs_addr_equal(svc->af, &dest->vaddr, &svc->addr) &&
1da177e4
LT		 684 dest->vport == svc->port))) {
685 /* HIT */
578bc3ef
JA		 686 list_del(&dest->t_list);
687 ip_vs_dest_hold(dest);
688 goto out;
1da177e4
LT		 689 }
690 }
691
578bc3ef
JA		 692 dest = NULL;
693
694out:
695 spin_unlock_bh(&ipvs->dest_trash_lock);
696
697 return dest;
1da177e4
LT		 698}
699
578bc3ef
JA		 700static void ip_vs_dest_free(struct ip_vs_dest *dest)
701{
bcbde4c0
JA		 702 struct ip_vs_service *svc = rcu_dereference_protected(dest->svc, 1);
703
578bc3ef 704 __ip_vs_dst_cache_reset(dest);
bcbde4c0 705 __ip_vs_svc_put(svc, false);
578bc3ef 706 free_percpu(dest->stats.cpustats);
9e4e948a 707 ip_vs_dest_put_and_free(dest);
578bc3ef 708}
1da177e4
LT		 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
578bc3ef 717 * be 0, so we simply release them here.
1da177e4 718 */
f2431e6e 719static void ip_vs_trash_cleanup(struct net *net)
1da177e4
LT		 720{
721 struct ip_vs_dest *dest, *nxt;
f2431e6e 722 struct netns_ipvs *ipvs = net_ipvs(net);
1da177e4 723
578bc3ef
JA		 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);
1da177e4
LT		 729 }
730}
731
55a3d4e1
JA		 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
55a3d4e1
JA		 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
ea9f22cc 745 ip_vs_read_estimator(dst, src);
55a3d4e1
JA		 746
747 spin_unlock_bh(&src->lock);
748}
1da177e4
LT		 749
750static void
751ip_vs_zero_stats(struct ip_vs_stats *stats)
752{
753 spin_lock_bh(&stats->lock);
e93615d0 754
55a3d4e1
JA		 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
55a3d4e1
JA		 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
1da177e4 765 ip_vs_zero_estimator(stats);
e93615d0 766
3a14a313 767 spin_unlock_bh(&stats->lock);
1da177e4
LT		 768}
769
770/*
771 * Update a destination in the given service
772 */
773static void
26c15cfd
JA		 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)
1da177e4 776{
fc723250 777 struct netns_ipvs *ipvs = net_ipvs(svc->net);
bcbde4c0 778 struct ip_vs_service *old_svc;
ceec4c38 779 struct ip_vs_scheduler *sched;
1da177e4
LT		 780 int conn_flags;
781
782 /* set the weight and the flags */
783 atomic_set(&dest->weight, udest->weight);
3575792e
JA		 784 conn_flags = udest->conn_flags & IP_VS_CONN_F_DEST_MASK;
785 conn_flags |= IP_VS_CONN_F_INACTIVE;
1da177e4 786
1da177e4 787 /* set the IP_VS_CONN_F_NOOUTPUT flag if not masquerading/NAT */
3575792e 788 if ((conn_flags & IP_VS_CONN_F_FWD_MASK) != IP_VS_CONN_F_MASQ) {
1da177e4
LT		 789 conn_flags |= IP_VS_CONN_F_NOOUTPUT;
790 } else {
791 /*
fc723250 792 * Put the real service in rs_table if not present.
1da177e4
LT		 793 * For now only for NAT!
794 */
fc723250 795 ip_vs_rs_hash(ipvs, dest);
1da177e4
LT		 796 }
797 atomic_set(&dest->conn_flags, conn_flags);
798
799 /* bind the service */
bcbde4c0
JA		 800 old_svc = rcu_dereference_protected(dest->svc, 1);
801 if (!old_svc) {
1da177e4
LT		 802 __ip_vs_bind_svc(dest, svc);
803 } else {
bcbde4c0 804 if (old_svc != svc) {
1da177e4
LT		 805 ip_vs_zero_stats(&dest->stats);
806 __ip_vs_bind_svc(dest, svc);
bcbde4c0 807 __ip_vs_svc_put(old_svc, true);
1da177e4
LT		 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;
26c15cfd 818
6cff339b
AG		 819 dest->af = udest->af;
820
ff75f40f 821 spin_lock_bh(&dest->dst_lock);
d1deae4d 822 __ip_vs_dst_cache_reset(dest);
ff75f40f 823 spin_unlock_bh(&dest->dst_lock);
fc604767 824
ceec4c38 825 sched = rcu_dereference_protected(svc->scheduler, 1);
26c15cfd 826 if (add) {
ceec4c38 827 ip_vs_start_estimator(svc->net, &dest->stats);
413c2d04 828 list_add_rcu(&dest->n_list, &svc->destinations);
26c15cfd 829 svc->num_dests++;
ceec4c38
JA		 830 if (sched->add_dest)
831 sched->add_dest(svc, dest);
6b6df466 832 } else {
ceec4c38
JA		 833 if (sched->upd_dest)
834 sched->upd_dest(svc, dest);
26c15cfd 835 }
1da177e4
LT		 836}
837
838
839/*
840 * Create a destination for the given service
841 */
842static int
c860c6b1 843ip_vs_new_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest,
1da177e4
LT		 844 struct ip_vs_dest **dest_p)
845{
846 struct ip_vs_dest *dest;
827da44c 847 unsigned int atype, i;
1da177e4
LT		 848
849 EnterFunction(2);
850
6cff339b
AG		 851 /* Temporary for consistency */
852 if (udest->af != svc->af)
853 return -EINVAL;
854
09571c7a 855#ifdef CONFIG_IP_VS_IPV6
6cff339b 856 if (udest->af == AF_INET6) {
09571c7a 857 atype = ipv6_addr_type(&udest->addr.in6);
3bfb92f4
SW		 858 if ((!(atype & IPV6_ADDR_UNICAST) ||
859 atype & IPV6_ADDR_LINKLOCAL) &&
4a98480b 860 !__ip_vs_addr_is_local_v6(svc->net, &udest->addr.in6))
09571c7a
VB		 861 return -EINVAL;
862 } else
863#endif
864 {
4a98480b 865 atype = inet_addr_type(svc->net, udest->addr.ip);
09571c7a
VB		 866 if (atype != RTN_LOCAL && atype != RTN_UNICAST)
867 return -EINVAL;
868 }
1da177e4 869
dee06e47 870 dest = kzalloc(sizeof(struct ip_vs_dest), GFP_KERNEL);
0a9ee813 871 if (dest == NULL)
1da177e4 872 return -ENOMEM;
0a9ee813 873
b17fc996 874 dest->stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
0a9ee813 875 if (!dest->stats.cpustats)
b17fc996 876 goto err_alloc;
1da177e4 877
827da44c
JS		 878 for_each_possible_cpu(i) {
879 struct ip_vs_cpu_stats *ip_vs_dest_stats;
880 ip_vs_dest_stats = per_cpu_ptr(dest->stats.cpustats, i);
881 u64_stats_init(&ip_vs_dest_stats->syncp);
882 }
883
6cff339b 884 dest->af = udest->af;
1da177e4 885 dest->protocol = svc->protocol;
c860c6b1 886 dest->vaddr = svc->addr;
1da177e4
LT		 887 dest->vport = svc->port;
888 dest->vfwmark = svc->fwmark;
6cff339b 889 ip_vs_addr_copy(udest->af, &dest->addr, &udest->addr);
1da177e4
LT		 890 dest->port = udest->port;
891
892 atomic_set(&dest->activeconns, 0);
893 atomic_set(&dest->inactconns, 0);
894 atomic_set(&dest->persistconns, 0);
26c15cfd 895 atomic_set(&dest->refcnt, 1);
1da177e4 896
276472ea 897 INIT_HLIST_NODE(&dest->d_list);
1da177e4
LT		 898 spin_lock_init(&dest->dst_lock);
899 spin_lock_init(&dest->stats.lock);
26c15cfd 900 __ip_vs_update_dest(svc, dest, udest, 1);
1da177e4
LT		 901
902 *dest_p = dest;
903
904 LeaveFunction(2);
905 return 0;
b17fc996
HS		 906
907err_alloc:
908 kfree(dest);
909 return -ENOMEM;
1da177e4
LT		 910}
911
912
913/*
914 * Add a destination into an existing service
915 */
916static int
c860c6b1 917ip_vs_add_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
1da177e4
LT		 918{
919 struct ip_vs_dest *dest;
c860c6b1 920 union nf_inet_addr daddr;
014d730d 921 __be16 dport = udest->port;
1da177e4
LT		 922 int ret;
923
924 EnterFunction(2);
925
926 if (udest->weight < 0) {
1e3e238e 927 pr_err("%s(): server weight less than zero\n", __func__);
1da177e4
LT		 928 return -ERANGE;
929 }
930
931 if (udest->l_threshold > udest->u_threshold) {
1e3e238e
HE		 932 pr_err("%s(): lower threshold is higher than upper threshold\n",
933 __func__);
1da177e4
LT		 934 return -ERANGE;
935 }
936
6cff339b 937 ip_vs_addr_copy(udest->af, &daddr, &udest->addr);
c860c6b1 938
413c2d04
JA		 939 /* We use function that requires RCU lock */
940 rcu_read_lock();
7937df15 941 dest = ip_vs_lookup_dest(svc, &daddr, dport);
413c2d04 942 rcu_read_unlock();
7937df15 943
1da177e4 944 if (dest != NULL) {
1e3e238e 945 IP_VS_DBG(1, "%s(): dest already exists\n", __func__);
1da177e4
LT		 946 return -EEXIST;
947 }
948
949 /*
950 * Check if the dest already exists in the trash and
951 * is from the same service
952 */
7937df15
JV		 953 dest = ip_vs_trash_get_dest(svc, &daddr, dport);
954
1da177e4 955 if (dest != NULL) {
cfc78c5a
JV		 956 IP_VS_DBG_BUF(3, "Get destination %s:%u from trash, "
957 "dest->refcnt=%d, service %u/%s:%u\n",
6cff339b 958 IP_VS_DBG_ADDR(udest->af, &daddr), ntohs(dport),
cfc78c5a
JV		 959 atomic_read(&dest->refcnt),
960 dest->vfwmark,
961 IP_VS_DBG_ADDR(svc->af, &dest->vaddr),
962 ntohs(dest->vport));
963
26c15cfd
JA		 964 __ip_vs_update_dest(svc, dest, udest, 1);
965 ret = 0;
966 } else {
1da177e4 967 /*
26c15cfd 968 * Allocate and initialize the dest structure
1da177e4 969 */
26c15cfd 970 ret = ip_vs_new_dest(svc, udest, &dest);
1da177e4 971 }
1da177e4
LT		 972 LeaveFunction(2);
973
26c15cfd 974 return ret;
1da177e4
LT		 975}
976
977
978/*
979 * Edit a destination in the given service
980 */
981static int
c860c6b1 982ip_vs_edit_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
1da177e4
LT		 983{
984 struct ip_vs_dest *dest;
c860c6b1 985 union nf_inet_addr daddr;
014d730d 986 __be16 dport = udest->port;
1da177e4
LT		 987
988 EnterFunction(2);
989
990 if (udest->weight < 0) {
1e3e238e 991 pr_err("%s(): server weight less than zero\n", __func__);
1da177e4
LT		 992 return -ERANGE;
993 }
994
995 if (udest->l_threshold > udest->u_threshold) {
1e3e238e
HE		 996 pr_err("%s(): lower threshold is higher than upper threshold\n",
997 __func__);
1da177e4
LT		 998 return -ERANGE;
999 }
1000
6cff339b 1001 ip_vs_addr_copy(udest->af, &daddr, &udest->addr);
c860c6b1 1002
413c2d04
JA		 1003 /* We use function that requires RCU lock */
1004 rcu_read_lock();
7937df15 1005 dest = ip_vs_lookup_dest(svc, &daddr, dport);
413c2d04 1006 rcu_read_unlock();
7937df15 1007
1da177e4 1008 if (dest == NULL) {
1e3e238e 1009 IP_VS_DBG(1, "%s(): dest doesn't exist\n", __func__);
1da177e4
LT		 1010 return -ENOENT;
1011 }
1012
26c15cfd 1013 __ip_vs_update_dest(svc, dest, udest, 0);
1da177e4
LT		 1014 LeaveFunction(2);
1015
1016 return 0;
1017}
1018
1da177e4
LT		 1019/*
1020 * Delete a destination (must be already unlinked from the service)
1021 */
578bc3ef
JA		 1022static void __ip_vs_del_dest(struct net *net, struct ip_vs_dest *dest,
1023 bool cleanup)
1da177e4 1024{
a0840e2e
HS		 1025 struct netns_ipvs *ipvs = net_ipvs(net);
1026
6ef757f9 1027 ip_vs_stop_estimator(net, &dest->stats);
1da177e4
LT		 1028
1029 /*
1030 * Remove it from the d-linked list with the real services.
1031 */
1da177e4 1032 ip_vs_rs_unhash(dest);
1da177e4 1033
578bc3ef
JA		 1034 spin_lock_bh(&ipvs->dest_trash_lock);
1035 IP_VS_DBG_BUF(3, "Moving dest %s:%u into trash, dest->refcnt=%d\n",
1036 IP_VS_DBG_ADDR(dest->af, &dest->addr), ntohs(dest->port),
1037 atomic_read(&dest->refcnt));
1038 if (list_empty(&ipvs->dest_trash) && !cleanup)
1039 mod_timer(&ipvs->dest_trash_timer,
bcbde4c0 1040 jiffies + (IP_VS_DEST_TRASH_PERIOD >> 1));
578bc3ef
JA		 1041 /* dest lives in trash without reference */
1042 list_add(&dest->t_list, &ipvs->dest_trash);
bcbde4c0 1043 dest->idle_start = 0;
578bc3ef
JA		 1044 spin_unlock_bh(&ipvs->dest_trash_lock);
1045 ip_vs_dest_put(dest);
1da177e4
LT		 1046}
1047
1048
1049/*
1050 * Unlink a destination from the given service
1051 */
1052static void __ip_vs_unlink_dest(struct ip_vs_service *svc,
1053 struct ip_vs_dest *dest,
1054 int svcupd)
1055{
1056 dest->flags &= ~IP_VS_DEST_F_AVAILABLE;
1057
1058 /*
1059 * Remove it from the d-linked destination list.
1060 */
413c2d04 1061 list_del_rcu(&dest->n_list);
1da177e4 1062 svc->num_dests--;
82dfb6f3 1063
ceec4c38
JA		 1064 if (svcupd) {
1065 struct ip_vs_scheduler *sched;
6b6df466 1066
ceec4c38
JA		 1067 sched = rcu_dereference_protected(svc->scheduler, 1);
1068 if (sched->del_dest)
1069 sched->del_dest(svc, dest);
1070 }
1da177e4
LT		 1071}
1072
1073
1074/*
1075 * Delete a destination server in the given service
1076 */
1077static int
c860c6b1 1078ip_vs_del_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
1da177e4
LT		 1079{
1080 struct ip_vs_dest *dest;
014d730d 1081 __be16 dport = udest->port;
1da177e4
LT		 1082
1083 EnterFunction(2);
1084
413c2d04
JA		 1085 /* We use function that requires RCU lock */
1086 rcu_read_lock();
7937df15 1087 dest = ip_vs_lookup_dest(svc, &udest->addr, dport);
413c2d04 1088 rcu_read_unlock();
c860c6b1 1089
1da177e4 1090 if (dest == NULL) {
1e3e238e 1091 IP_VS_DBG(1, "%s(): destination not found!\n", __func__);
1da177e4
LT		 1092 return -ENOENT;
1093 }
1094
1da177e4
LT		 1095 /*
1096 * Unlink dest from the service
1097 */
1098 __ip_vs_unlink_dest(svc, dest, 1);
1099
1da177e4
LT		 1100 /*
1101 * Delete the destination
1102 */
578bc3ef 1103 __ip_vs_del_dest(svc->net, dest, false);
1da177e4
LT		 1104
1105 LeaveFunction(2);
1106
1107 return 0;
1108}
1109
578bc3ef
JA		 1110static void ip_vs_dest_trash_expire(unsigned long data)
1111{
1112 struct net *net = (struct net *) data;
1113 struct netns_ipvs *ipvs = net_ipvs(net);
1114 struct ip_vs_dest *dest, *next;
bcbde4c0 1115 unsigned long now = jiffies;
578bc3ef
JA		 1116
1117 spin_lock(&ipvs->dest_trash_lock);
1118 list_for_each_entry_safe(dest, next, &ipvs->dest_trash, t_list) {
578bc3ef
JA		 1119 if (atomic_read(&dest->refcnt) > 0)
1120 continue;
bcbde4c0
JA		 1121 if (dest->idle_start) {
1122 if (time_before(now, dest->idle_start +
1123 IP_VS_DEST_TRASH_PERIOD))
1124 continue;
1125 } else {
1126 dest->idle_start = max(1UL, now);
1127 continue;
1128 }
578bc3ef
JA		 1129 IP_VS_DBG_BUF(3, "Removing destination %u/%s:%u from trash\n",
1130 dest->vfwmark,
bcbde4c0 1131 IP_VS_DBG_ADDR(dest->af, &dest->addr),
578bc3ef
JA		 1132 ntohs(dest->port));
1133 list_del(&dest->t_list);
1134 ip_vs_dest_free(dest);
1135 }
1136 if (!list_empty(&ipvs->dest_trash))
1137 mod_timer(&ipvs->dest_trash_timer,
bcbde4c0 1138 jiffies + (IP_VS_DEST_TRASH_PERIOD >> 1));
578bc3ef
JA		 1139 spin_unlock(&ipvs->dest_trash_lock);
1140}
1da177e4
LT		 1141
1142/*
1143 * Add a service into the service hash table
1144 */
1145static int
fc723250 1146ip_vs_add_service(struct net *net, struct ip_vs_service_user_kern *u,
c860c6b1 1147 struct ip_vs_service **svc_p)
1da177e4 1148{
827da44c 1149 int ret = 0, i;
1da177e4 1150 struct ip_vs_scheduler *sched = NULL;
0d1e71b0 1151 struct ip_vs_pe *pe = NULL;
1da177e4 1152 struct ip_vs_service *svc = NULL;
a0840e2e 1153 struct netns_ipvs *ipvs = net_ipvs(net);
1da177e4
LT		 1154
1155 /* increase the module use count */
1156 ip_vs_use_count_inc();
1157
1158 /* Lookup the scheduler by 'u->sched_name' */
1159 sched = ip_vs_scheduler_get(u->sched_name);
1160 if (sched == NULL) {
1e3e238e 1161 pr_info("Scheduler module ip_vs_%s not found\n", u->sched_name);
1da177e4 1162 ret = -ENOENT;
6e08bfb8 1163 goto out_err;
1da177e4
LT		 1164 }
1165
0d1e71b0 1166 if (u->pe_name && *u->pe_name) {
e9e5eee8 1167 pe = ip_vs_pe_getbyname(u->pe_name);
0d1e71b0
SH		 1168 if (pe == NULL) {
1169 pr_info("persistence engine module ip_vs_pe_%s "
1170 "not found\n", u->pe_name);
1171 ret = -ENOENT;
1172 goto out_err;
1173 }
1174 }
1175
f94fd041 1176#ifdef CONFIG_IP_VS_IPV6
0a925864
JA		 1177 if (u->af == AF_INET6) {
1178 __u32 plen = (__force __u32) u->netmask;
1179
1180 if (plen < 1 || plen > 128) {
1181 ret = -EINVAL;
1182 goto out_err;
1183 }
f94fd041
JV		 1184 }
1185#endif
1186
dee06e47 1187 svc = kzalloc(sizeof(struct ip_vs_service), GFP_KERNEL);
1da177e4 1188 if (svc == NULL) {
1e3e238e 1189 IP_VS_DBG(1, "%s(): no memory\n", __func__);
1da177e4
LT		 1190 ret = -ENOMEM;
1191 goto out_err;
1192 }
b17fc996 1193 svc->stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
0a54e939
JL		 1194 if (!svc->stats.cpustats) {
1195 ret = -ENOMEM;
b17fc996 1196 goto out_err;
0a54e939 1197 }
1da177e4 1198
827da44c
JS		 1199 for_each_possible_cpu(i) {
1200 struct ip_vs_cpu_stats *ip_vs_stats;
1201 ip_vs_stats = per_cpu_ptr(svc->stats.cpustats, i);
1202 u64_stats_init(&ip_vs_stats->syncp);
1203 }
1204
1205
1da177e4 1206 /* I'm the first user of the service */
1da177e4
LT		 1207 atomic_set(&svc->refcnt, 0);
1208
c860c6b1 1209 svc->af = u->af;
1da177e4 1210 svc->protocol = u->protocol;
c860c6b1 1211 ip_vs_addr_copy(svc->af, &svc->addr, &u->addr);
1da177e4
LT		 1212 svc->port = u->port;
1213 svc->fwmark = u->fwmark;
1214 svc->flags = u->flags;
1215 svc->timeout = u->timeout * HZ;
1216 svc->netmask = u->netmask;
fc723250 1217 svc->net = net;
1da177e4
LT		 1218
1219 INIT_LIST_HEAD(&svc->destinations);
ba3a3ce1 1220 spin_lock_init(&svc->sched_lock);
1da177e4
LT		 1221 spin_lock_init(&svc->stats.lock);
1222
1223 /* Bind the scheduler */
1224 ret = ip_vs_bind_scheduler(svc, sched);
1225 if (ret)
1226 goto out_err;
1227 sched = NULL;
1228
0d1e71b0 1229 /* Bind the ct retriever */
ceec4c38 1230 RCU_INIT_POINTER(svc->pe, pe);
0d1e71b0
SH		 1231 pe = NULL;
1232
1da177e4
LT		 1233 /* Update the virtual service counters */
1234 if (svc->port == FTPPORT)
763f8d0e 1235 atomic_inc(&ipvs->ftpsvc_counter);
1da177e4 1236 else if (svc->port == 0)
763f8d0e 1237 atomic_inc(&ipvs->nullsvc_counter);
1da177e4 1238
6ef757f9 1239 ip_vs_start_estimator(net, &svc->stats);
f94fd041
JV		 1240
1241 /* Count only IPv4 services for old get/setsockopt interface */
1242 if (svc->af == AF_INET)
a0840e2e 1243 ipvs->num_services++;
1da177e4
LT		 1244
1245 /* Hash the service into the service table */
1da177e4 1246 ip_vs_svc_hash(svc);
1da177e4
LT		 1247
1248 *svc_p = svc;
7a4f0761
HS		 1249 /* Now there is a service - full throttle */
1250 ipvs->enable = 1;
1da177e4
LT		 1251 return 0;
1252
b17fc996 1253
6e08bfb8 1254 out_err:
1da177e4 1255 if (svc != NULL) {
ceec4c38
JA		 1256 ip_vs_unbind_scheduler(svc, sched);
1257 ip_vs_service_free(svc);
1da177e4
LT		 1258 }
1259 ip_vs_scheduler_put(sched);
0d1e71b0 1260 ip_vs_pe_put(pe);
1da177e4 1261
1da177e4
LT		 1262 /* decrease the module use count */
1263 ip_vs_use_count_dec();
1264
1265 return ret;
1266}
1267
1268
1269/*
1270 * Edit a service and bind it with a new scheduler
1271 */
1272static int
c860c6b1 1273ip_vs_edit_service(struct ip_vs_service *svc, struct ip_vs_service_user_kern *u)
1da177e4
LT		 1274{
1275 struct ip_vs_scheduler *sched, *old_sched;
0d1e71b0 1276 struct ip_vs_pe *pe = NULL, *old_pe = NULL;
1da177e4
LT		 1277 int ret = 0;
1278
1279 /*
1280 * Lookup the scheduler, by 'u->sched_name'
1281 */
1282 sched = ip_vs_scheduler_get(u->sched_name);
1283 if (sched == NULL) {
1e3e238e 1284 pr_info("Scheduler module ip_vs_%s not found\n", u->sched_name);
1da177e4
LT		 1285 return -ENOENT;
1286 }
1287 old_sched = sched;
1288
0d1e71b0 1289 if (u->pe_name && *u->pe_name) {
e9e5eee8 1290 pe = ip_vs_pe_getbyname(u->pe_name);
0d1e71b0
SH		 1291 if (pe == NULL) {
1292 pr_info("persistence engine module ip_vs_pe_%s "
1293 "not found\n", u->pe_name);
1294 ret = -ENOENT;
1295 goto out;
1296 }
1297 old_pe = pe;
1298 }
1299
f94fd041 1300#ifdef CONFIG_IP_VS_IPV6
0a925864
JA		 1301 if (u->af == AF_INET6) {
1302 __u32 plen = (__force __u32) u->netmask;
1303
1304 if (plen < 1 || plen > 128) {
1305 ret = -EINVAL;
1306 goto out;
1307 }
f94fd041
JV		 1308 }
1309#endif
1310
ceec4c38
JA		 1311 old_sched = rcu_dereference_protected(svc->scheduler, 1);
1312 if (sched != old_sched) {
1313 /* Bind the new scheduler */
1314 ret = ip_vs_bind_scheduler(svc, sched);
1315 if (ret) {
1316 old_sched = sched;
1317 goto out;
1318 }
1319 /* Unbind the old scheduler on success */
1320 ip_vs_unbind_scheduler(svc, old_sched);
1321 }
1da177e4
LT		 1322
1323 /*
1324 * Set the flags and timeout value
1325 */
1326 svc->flags = u->flags | IP_VS_SVC_F_HASHED;
1327 svc->timeout = u->timeout * HZ;
1328 svc->netmask = u->netmask;
1329
ceec4c38
JA		 1330 old_pe = rcu_dereference_protected(svc->pe, 1);
1331 if (pe != old_pe)
1332 rcu_assign_pointer(svc->pe, pe);
1da177e4 1333
552ad65a 1334out:
6e08bfb8 1335 ip_vs_scheduler_put(old_sched);
0d1e71b0 1336 ip_vs_pe_put(old_pe);
1da177e4
LT		 1337 return ret;
1338}
1339
1da177e4
LT		 1340/*
1341 * Delete a service from the service list
1342 * - The service must be unlinked, unlocked and not referenced!
1343 * - We are called under _bh lock
1344 */
578bc3ef 1345static void __ip_vs_del_service(struct ip_vs_service *svc, bool cleanup)
1da177e4
LT		 1346{
1347 struct ip_vs_dest *dest, *nxt;
1348 struct ip_vs_scheduler *old_sched;
0d1e71b0 1349 struct ip_vs_pe *old_pe;
a0840e2e 1350 struct netns_ipvs *ipvs = net_ipvs(svc->net);
0d1e71b0
SH		 1351
1352 pr_info("%s: enter\n", __func__);
1da177e4 1353
f94fd041
JV		 1354 /* Count only IPv4 services for old get/setsockopt interface */
1355 if (svc->af == AF_INET)
a0840e2e 1356 ipvs->num_services--;
f94fd041 1357
6ef757f9 1358 ip_vs_stop_estimator(svc->net, &svc->stats);
1da177e4
LT		 1359
1360 /* Unbind scheduler */
ceec4c38
JA		 1361 old_sched = rcu_dereference_protected(svc->scheduler, 1);
1362 ip_vs_unbind_scheduler(svc, old_sched);
6e08bfb8 1363 ip_vs_scheduler_put(old_sched);
1da177e4 1364
ceec4c38
JA		 1365 /* Unbind persistence engine, keep svc->pe */
1366 old_pe = rcu_dereference_protected(svc->pe, 1);
0d1e71b0
SH		 1367 ip_vs_pe_put(old_pe);
1368
1da177e4
LT		 1369 /*
1370 * Unlink the whole destination list
1371 */
1372 list_for_each_entry_safe(dest, nxt, &svc->destinations, n_list) {
1373 __ip_vs_unlink_dest(svc, dest, 0);
578bc3ef 1374 __ip_vs_del_dest(svc->net, dest, cleanup);
1da177e4
LT		 1375 }
1376
1377 /*
1378 * Update the virtual service counters
1379 */
1380 if (svc->port == FTPPORT)
763f8d0e 1381 atomic_dec(&ipvs->ftpsvc_counter);
1da177e4 1382 else if (svc->port == 0)
763f8d0e 1383 atomic_dec(&ipvs->nullsvc_counter);
1da177e4
LT		 1384
1385 /*
1386 * Free the service if nobody refers to it
1387 */
bcbde4c0 1388 __ip_vs_svc_put(svc, true);
1da177e4
LT		 1389
1390 /* decrease the module use count */
1391 ip_vs_use_count_dec();
1392}
1393
1394/*
26c15cfd 1395 * Unlink a service from list and try to delete it if its refcnt reached 0
1da177e4 1396 */
578bc3ef 1397static void ip_vs_unlink_service(struct ip_vs_service *svc, bool cleanup)
1da177e4 1398{
ceec4c38
JA		 1399 /* Hold svc to avoid double release from dest_trash */
1400 atomic_inc(&svc->refcnt);
1da177e4
LT		 1401 /*
1402 * Unhash it from the service table
1403 */
1da177e4
LT		 1404 ip_vs_svc_unhash(svc);
1405
578bc3ef 1406 __ip_vs_del_service(svc, cleanup);
26c15cfd
JA		 1407}
1408
1409/*
1410 * Delete a service from the service list
1411 */
1412static int ip_vs_del_service(struct ip_vs_service *svc)
1413{
1414 if (svc == NULL)
1415 return -EEXIST;
578bc3ef 1416 ip_vs_unlink_service(svc, false);
1da177e4
LT		 1417
1418 return 0;
1419}
1420
1421
1422/*
1423 * Flush all the virtual services
1424 */
578bc3ef 1425static int ip_vs_flush(struct net *net, bool cleanup)
1da177e4
LT		 1426{
1427 int idx;
ceec4c38
JA		 1428 struct ip_vs_service *svc;
1429 struct hlist_node *n;
1da177e4
LT		 1430
1431 /*
fc723250 1432 * Flush the service table hashed by <netns,protocol,addr,port>
1da177e4
LT		 1433 */
1434 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38
JA		 1435 hlist_for_each_entry_safe(svc, n, &ip_vs_svc_table[idx],
1436 s_list) {
fc723250 1437 if (net_eq(svc->net, net))
578bc3ef 1438 ip_vs_unlink_service(svc, cleanup);
1da177e4
LT		 1439 }
1440 }
1441
1442 /*
1443 * Flush the service table hashed by fwmark
1444 */
1445 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38
JA		 1446 hlist_for_each_entry_safe(svc, n, &ip_vs_svc_fwm_table[idx],
1447 f_list) {
fc723250 1448 if (net_eq(svc->net, net))
578bc3ef 1449 ip_vs_unlink_service(svc, cleanup);
1da177e4
LT		 1450 }
1451 }
1452
1453 return 0;
1454}
1455
7a4f0761
HS		 1456/*
1457 * Delete service by {netns} in the service table.
1458 * Called by __ip_vs_cleanup()
1459 */
503cf15a 1460void ip_vs_service_net_cleanup(struct net *net)
7a4f0761
HS		 1461{
1462 EnterFunction(2);
1463 /* Check for "full" addressed entries */
1464 mutex_lock(&__ip_vs_mutex);
578bc3ef 1465 ip_vs_flush(net, true);
7a4f0761
HS		 1466 mutex_unlock(&__ip_vs_mutex);
1467 LeaveFunction(2);
1468}
d1deae4d
JA		 1469
1470/* Put all references for device (dst_cache) */
7a4f0761 1471static inline void
d1deae4d 1472ip_vs_forget_dev(struct ip_vs_dest *dest, struct net_device *dev)
7a4f0761 1473{
d717bb2a
JA		 1474 struct ip_vs_dest_dst *dest_dst;
1475
7a4f0761 1476 spin_lock_bh(&dest->dst_lock);
d717bb2a
JA		 1477 dest_dst = rcu_dereference_protected(dest->dest_dst, 1);
1478 if (dest_dst && dest_dst->dst_cache->dev == dev) {
7a4f0761
HS		 1479 IP_VS_DBG_BUF(3, "Reset dev:%s dest %s:%u ,dest->refcnt=%d\n",
1480 dev->name,
1481 IP_VS_DBG_ADDR(dest->af, &dest->addr),
1482 ntohs(dest->port),
1483 atomic_read(&dest->refcnt));
d1deae4d 1484 __ip_vs_dst_cache_reset(dest);
7a4f0761
HS		 1485 }
1486 spin_unlock_bh(&dest->dst_lock);
1487
1488}
313eae63
JA		 1489/* Netdev event receiver
1490 * Currently only NETDEV_DOWN is handled to release refs to cached dsts
7a4f0761
HS		 1491 */
1492static int ip_vs_dst_event(struct notifier_block *this, unsigned long event,
351638e7 1493 void *ptr)
7a4f0761 1494{
351638e7 1495 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
7a4f0761 1496 struct net *net = dev_net(dev);
283283c4 1497 struct netns_ipvs *ipvs = net_ipvs(net);
7a4f0761
HS		 1498 struct ip_vs_service *svc;
1499 struct ip_vs_dest *dest;
1500 unsigned int idx;
1501
313eae63 1502 if (event != NETDEV_DOWN || !ipvs)
7a4f0761
HS		 1503 return NOTIFY_DONE;
1504 IP_VS_DBG(3, "%s() dev=%s\n", __func__, dev->name);
1505 EnterFunction(2);
1506 mutex_lock(&__ip_vs_mutex);
1507 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38 1508 hlist_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
7a4f0761
HS		 1509 if (net_eq(svc->net, net)) {
1510 list_for_each_entry(dest, &svc->destinations,
1511 n_list) {
d1deae4d 1512 ip_vs_forget_dev(dest, dev);
7a4f0761
HS		 1513 }
1514 }
1515 }
1516
ceec4c38 1517 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
7a4f0761
HS		 1518 if (net_eq(svc->net, net)) {
1519 list_for_each_entry(dest, &svc->destinations,
1520 n_list) {
d1deae4d 1521 ip_vs_forget_dev(dest, dev);
7a4f0761
HS		 1522 }
1523 }
1524
1525 }
1526 }
1527
578bc3ef
JA		 1528 spin_lock_bh(&ipvs->dest_trash_lock);
1529 list_for_each_entry(dest, &ipvs->dest_trash, t_list) {
d1deae4d 1530 ip_vs_forget_dev(dest, dev);
7a4f0761 1531 }
578bc3ef 1532 spin_unlock_bh(&ipvs->dest_trash_lock);
7a4f0761
HS		 1533 mutex_unlock(&__ip_vs_mutex);
1534 LeaveFunction(2);
1535 return NOTIFY_DONE;
1536}
1da177e4
LT		 1537
1538/*
1539 * Zero counters in a service or all services
1540 */
1541static int ip_vs_zero_service(struct ip_vs_service *svc)
1542{
1543 struct ip_vs_dest *dest;
1544
1da177e4
LT		 1545 list_for_each_entry(dest, &svc->destinations, n_list) {
1546 ip_vs_zero_stats(&dest->stats);
1547 }
1548 ip_vs_zero_stats(&svc->stats);
1da177e4
LT		 1549 return 0;
1550}
1551
fc723250 1552static int ip_vs_zero_all(struct net *net)
1da177e4
LT		 1553{
1554 int idx;
1555 struct ip_vs_service *svc;
1556
1557 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38 1558 hlist_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
fc723250
HS		 1559 if (net_eq(svc->net, net))
1560 ip_vs_zero_service(svc);
1da177e4
LT		 1561 }
1562 }
1563
1564 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38 1565 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
fc723250
HS		 1566 if (net_eq(svc->net, net))
1567 ip_vs_zero_service(svc);
1da177e4
LT		 1568 }
1569 }
1570
2a0751af 1571 ip_vs_zero_stats(&net_ipvs(net)->tot_stats);
1da177e4
LT		 1572 return 0;
1573}
1574
14e40546 1575#ifdef CONFIG_SYSCTL
749c42b6
JA		 1576
1577static int zero;
1578static int three = 3;
1579
1da177e4 1580static int
fe2c6338 1581proc_do_defense_mode(struct ctl_table *table, int write,
1da177e4
LT		 1582 void __user *buffer, size_t *lenp, loff_t *ppos)
1583{
9330419d 1584 struct net *net = current->nsproxy->net_ns;
1da177e4
LT		 1585 int *valp = table->data;
1586 int val = *valp;
1587 int rc;
1588
8d65af78 1589 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1da177e4
LT		 1590 if (write && (*valp != val)) {
1591 if ((*valp < 0) || (*valp > 3)) {
1592 /* Restore the correct value */
1593 *valp = val;
1594 } else {
9330419d 1595 update_defense_level(net_ipvs(net));
1da177e4
LT		 1596 }
1597 }
1598 return rc;
1599}
1600
1da177e4 1601static int
fe2c6338 1602proc_do_sync_threshold(struct ctl_table *table, int write,
1da177e4
LT		 1603 void __user *buffer, size_t *lenp, loff_t *ppos)
1604{
1605 int *valp = table->data;
1606 int val[2];
1607 int rc;
1608
1609 /* backup the value first */
1610 memcpy(val, valp, sizeof(val));
1611
8d65af78 1612 rc = proc_dointvec(table, write, buffer, lenp, ppos);
749c42b6
JA		 1613 if (write && (valp[0] < 0 || valp[1] < 0 ||
1614 (valp[0] >= valp[1] && valp[1]))) {
1da177e4
LT		 1615 /* Restore the correct value */
1616 memcpy(valp, val, sizeof(val));
1617 }
1618 return rc;
1619}
1620
b880c1f0 1621static int
fe2c6338 1622proc_do_sync_mode(struct ctl_table *table, int write,
b880c1f0
HS		 1623 void __user *buffer, size_t *lenp, loff_t *ppos)
1624{
1625 int *valp = table->data;
1626 int val = *valp;
1627 int rc;
1628
1629 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1630 if (write && (*valp != val)) {
1631 if ((*valp < 0) || (*valp > 1)) {
1632 /* Restore the correct value */
1633 *valp = val;
f73181c8
PNA		 1634 }
1635 }
1636 return rc;
1637}
1638
1639static int
fe2c6338 1640proc_do_sync_ports(struct ctl_table *table, int write,
f73181c8
PNA		 1641 void __user *buffer, size_t *lenp, loff_t *ppos)
1642{
1643 int *valp = table->data;
1644 int val = *valp;
1645 int rc;
1646
1647 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1648 if (write && (*valp != val)) {
1649 if (*valp < 1 || !is_power_of_2(*valp)) {
1650 /* Restore the correct value */
1651 *valp = val;
b880c1f0
HS		 1652 }
1653 }
1654 return rc;
1655}
1da177e4
LT		 1656
1657/*
1658 * IPVS sysctl table (under the /proc/sys/net/ipv4/vs/)
a0840e2e 1659 * Do not change order or insert new entries without
503cf15a 1660 * align with netns init in ip_vs_control_net_init()
1da177e4
LT		 1661 */
1662
1663static struct ctl_table vs_vars[] = {
1664 {
1da177e4 1665 .procname = "amemthresh",
1da177e4
LT		 1666 .maxlen = sizeof(int),
1667 .mode = 0644,
6d9f239a 1668 .proc_handler = proc_dointvec,
1da177e4 1669 },
1da177e4 1670 {
1da177e4 1671 .procname = "am_droprate",
1da177e4
LT		 1672 .maxlen = sizeof(int),
1673 .mode = 0644,
6d9f239a 1674 .proc_handler = proc_dointvec,
1da177e4
LT		 1675 },
1676 {
1da177e4 1677 .procname = "drop_entry",
1da177e4
LT		 1678 .maxlen = sizeof(int),
1679 .mode = 0644,
6d9f239a 1680 .proc_handler = proc_do_defense_mode,
1da177e4
LT		 1681 },
1682 {
1da177e4 1683 .procname = "drop_packet",
1da177e4
LT		 1684 .maxlen = sizeof(int),
1685 .mode = 0644,
6d9f239a 1686 .proc_handler = proc_do_defense_mode,
1da177e4 1687 },
f4bc17cd
JA		 1688#ifdef CONFIG_IP_VS_NFCT
1689 {
1690 .procname = "conntrack",
f4bc17cd
JA		 1691 .maxlen = sizeof(int),
1692 .mode = 0644,
1693 .proc_handler = &proc_dointvec,
1694 },
1695#endif
1da177e4 1696 {
1da177e4 1697 .procname = "secure_tcp",
1da177e4
LT		 1698 .maxlen = sizeof(int),
1699 .mode = 0644,
6d9f239a 1700 .proc_handler = proc_do_defense_mode,
1da177e4 1701 },
8a803040
JA		 1702 {
1703 .procname = "snat_reroute",
8a803040
JA		 1704 .maxlen = sizeof(int),
1705 .mode = 0644,
1706 .proc_handler = &proc_dointvec,
1707 },
b880c1f0
HS		 1708 {
1709 .procname = "sync_version",
b880c1f0
HS		 1710 .maxlen = sizeof(int),
1711 .mode = 0644,
1712 .proc_handler = &proc_do_sync_mode,
1713 },
f73181c8
PNA		 1714 {
1715 .procname = "sync_ports",
1716 .maxlen = sizeof(int),
1717 .mode = 0644,
1718 .proc_handler = &proc_do_sync_ports,
1719 },
4d0c875d
JA		 1720 {
1721 .procname = "sync_persist_mode",
1722 .maxlen = sizeof(int),
1723 .mode = 0644,
1724 .proc_handler = proc_dointvec,
1725 },
1c003b15
PNA		 1726 {
1727 .procname = "sync_qlen_max",
07995674 1728 .maxlen = sizeof(unsigned long),
1c003b15 1729 .mode = 0644,
07995674 1730 .proc_handler = proc_doulongvec_minmax,
1c003b15
PNA		 1731 },
1732 {
1733 .procname = "sync_sock_size",
1734 .maxlen = sizeof(int),
1735 .mode = 0644,
1736 .proc_handler = proc_dointvec,
1737 },
a0840e2e
HS		 1738 {
1739 .procname = "cache_bypass",
1740 .maxlen = sizeof(int),
1741 .mode = 0644,
1742 .proc_handler = proc_dointvec,
1743 },
1744 {
1745 .procname = "expire_nodest_conn",
1746 .maxlen = sizeof(int),
1747 .mode = 0644,
1748 .proc_handler = proc_dointvec,
1749 },
c6c96c18
AF		 1750 {
1751 .procname = "sloppy_tcp",
1752 .maxlen = sizeof(int),
1753 .mode = 0644,
1754 .proc_handler = proc_dointvec,
1755 },
1756 {
1757 .procname = "sloppy_sctp",
1758 .maxlen = sizeof(int),
1759 .mode = 0644,
1760 .proc_handler = proc_dointvec,
1761 },
a0840e2e
HS		 1762 {
1763 .procname = "expire_quiescent_template",
1764 .maxlen = sizeof(int),
1765 .mode = 0644,
1766 .proc_handler = proc_dointvec,
1767 },
1768 {
1769 .procname = "sync_threshold",
1770 .maxlen =
1771 sizeof(((struct netns_ipvs *)0)->sysctl_sync_threshold),
1772 .mode = 0644,
1773 .proc_handler = proc_do_sync_threshold,
1774 },
749c42b6
JA		 1775 {
1776 .procname = "sync_refresh_period",
1777 .maxlen = sizeof(int),
1778 .mode = 0644,
1779 .proc_handler = proc_dointvec_jiffies,
1780 },
1781 {
1782 .procname = "sync_retries",
1783 .maxlen = sizeof(int),
1784 .mode = 0644,
1785 .proc_handler = proc_dointvec_minmax,
1786 .extra1 = &zero,
1787 .extra2 = &three,
1788 },
a0840e2e
HS		 1789 {
1790 .procname = "nat_icmp_send",
1791 .maxlen = sizeof(int),
1792 .mode = 0644,
1793 .proc_handler = proc_dointvec,
1794 },
3654e611
JA		 1795 {
1796 .procname = "pmtu_disc",
1797 .maxlen = sizeof(int),
1798 .mode = 0644,
1799 .proc_handler = proc_dointvec,
1800 },
0c12582f
JA		 1801 {
1802 .procname = "backup_only",
1803 .maxlen = sizeof(int),
1804 .mode = 0644,
1805 .proc_handler = proc_dointvec,
1806 },
a0840e2e
HS		 1807#ifdef CONFIG_IP_VS_DEBUG
1808 {
1809 .procname = "debug_level",
1810 .data = &sysctl_ip_vs_debug_level,
1811 .maxlen = sizeof(int),
1812 .mode = 0644,
1813 .proc_handler = proc_dointvec,
1814 },
1da177e4 1815#endif
f8572d8f 1816 { }
1da177e4
LT		 1817};
1818
14e40546 1819#endif
1da177e4 1820
1da177e4
LT		 1821#ifdef CONFIG_PROC_FS
1822
1823struct ip_vs_iter {
fc723250 1824 struct seq_net_private p; /* Do not move this, netns depends upon it*/
ceec4c38 1825 struct hlist_head *table;
1da177e4
LT		 1826 int bucket;
1827};
1828
1829/*
1830 * Write the contents of the VS rule table to a PROCfs file.
1831 * (It is kept just for backward compatibility)
1832 */
95c96174 1833static inline const char *ip_vs_fwd_name(unsigned int flags)
1da177e4
LT		 1834{
1835 switch (flags & IP_VS_CONN_F_FWD_MASK) {
1836 case IP_VS_CONN_F_LOCALNODE:
1837 return "Local";
1838 case IP_VS_CONN_F_TUNNEL:
1839 return "Tunnel";
1840 case IP_VS_CONN_F_DROUTE:
1841 return "Route";
1842 default:
1843 return "Masq";
1844 }
1845}
1846
1847
1848/* Get the Nth entry in the two lists */
1849static struct ip_vs_service *ip_vs_info_array(struct seq_file *seq, loff_t pos)
1850{
fc723250 1851 struct net *net = seq_file_net(seq);
1da177e4
LT		 1852 struct ip_vs_iter *iter = seq->private;
1853 int idx;
1854 struct ip_vs_service *svc;
1855
1856 /* look in hash by protocol */
1857 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38 1858 hlist_for_each_entry_rcu(svc, &ip_vs_svc_table[idx], s_list) {
fc723250 1859 if (net_eq(svc->net, net) && pos-- == 0) {
1da177e4
LT		 1860 iter->table = ip_vs_svc_table;
1861 iter->bucket = idx;
1862 return svc;
1863 }
1864 }
1865 }
1866
1867 /* keep looking in fwmark */
1868 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38
JA		 1869 hlist_for_each_entry_rcu(svc, &ip_vs_svc_fwm_table[idx],
1870 f_list) {
fc723250 1871 if (net_eq(svc->net, net) && pos-- == 0) {
1da177e4
LT		 1872 iter->table = ip_vs_svc_fwm_table;
1873 iter->bucket = idx;
1874 return svc;
1875 }
1876 }
1877 }
1878
1879 return NULL;
1880}
1881
1882static void *ip_vs_info_seq_start(struct seq_file *seq, loff_t *pos)
371990ee 1883 __acquires(RCU)
1da177e4 1884{
ceec4c38 1885 rcu_read_lock();
1da177e4
LT		 1886 return *pos ? ip_vs_info_array(seq, *pos - 1) : SEQ_START_TOKEN;
1887}
1888
1889
1890static void *ip_vs_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1891{
ceec4c38 1892 struct hlist_node *e;
1da177e4
LT		 1893 struct ip_vs_iter *iter;
1894 struct ip_vs_service *svc;
1895
1896 ++*pos;
1897 if (v == SEQ_START_TOKEN)
1898 return ip_vs_info_array(seq,0);
1899
1900 svc = v;
1901 iter = seq->private;
1902
1903 if (iter->table == ip_vs_svc_table) {
1904 /* next service in table hashed by protocol */
ceec4c38
JA		 1905 e = rcu_dereference(hlist_next_rcu(&svc->s_list));
1906 if (e)
1907 return hlist_entry(e, struct ip_vs_service, s_list);
1da177e4
LT		 1908
1909 while (++iter->bucket < IP_VS_SVC_TAB_SIZE) {
ceec4c38
JA		 1910 hlist_for_each_entry_rcu(svc,
1911 &ip_vs_svc_table[iter->bucket],
1912 s_list) {
1da177e4
LT		 1913 return svc;
1914 }
1915 }
1916
1917 iter->table = ip_vs_svc_fwm_table;
1918 iter->bucket = -1;
1919 goto scan_fwmark;
1920 }
1921
1922 /* next service in hashed by fwmark */
ceec4c38
JA		 1923 e = rcu_dereference(hlist_next_rcu(&svc->f_list));
1924 if (e)
1925 return hlist_entry(e, struct ip_vs_service, f_list);
1da177e4
LT		 1926
1927 scan_fwmark:
1928 while (++iter->bucket < IP_VS_SVC_TAB_SIZE) {
ceec4c38
JA		 1929 hlist_for_each_entry_rcu(svc,
1930 &ip_vs_svc_fwm_table[iter->bucket],
1931 f_list)
1da177e4
LT		 1932 return svc;
1933 }
1934
1935 return NULL;
1936}
1937
1938static void ip_vs_info_seq_stop(struct seq_file *seq, void *v)
371990ee 1939 __releases(RCU)
1da177e4 1940{
ceec4c38 1941 rcu_read_unlock();
1da177e4
LT		 1942}
1943
1944
1945static int ip_vs_info_seq_show(struct seq_file *seq, void *v)
1946{
1947 if (v == SEQ_START_TOKEN) {
1948 seq_printf(seq,
1949 "IP Virtual Server version %d.%d.%d (size=%d)\n",
6f7edb48 1950 NVERSION(IP_VS_VERSION_CODE), ip_vs_conn_tab_size);
1da177e4
LT		 1951 seq_puts(seq,
1952 "Prot LocalAddress:Port Scheduler Flags\n");
1953 seq_puts(seq,
1954 " -> RemoteAddress:Port Forward Weight ActiveConn InActConn\n");
1955 } else {
1956 const struct ip_vs_service *svc = v;
1957 const struct ip_vs_iter *iter = seq->private;
1958 const struct ip_vs_dest *dest;
ceec4c38 1959 struct ip_vs_scheduler *sched = rcu_dereference(svc->scheduler);
1da177e4 1960
667a5f18
VB		 1961 if (iter->table == ip_vs_svc_table) {
1962#ifdef CONFIG_IP_VS_IPV6
1963 if (svc->af == AF_INET6)
5b095d98 1964 seq_printf(seq, "%s [%pI6]:%04X %s ",
667a5f18 1965 ip_vs_proto_name(svc->protocol),
38ff4fa4 1966 &svc->addr.in6,
667a5f18 1967 ntohs(svc->port),
ceec4c38 1968 sched->name);
667a5f18
VB		 1969 else
1970#endif
26ec037f 1971 seq_printf(seq, "%s %08X:%04X %s %s ",
667a5f18
VB		 1972 ip_vs_proto_name(svc->protocol),
1973 ntohl(svc->addr.ip),
1974 ntohs(svc->port),
ceec4c38 1975 sched->name,
26ec037f 1976 (svc->flags & IP_VS_SVC_F_ONEPACKET)?"ops ":"");
667a5f18 1977 } else {
26ec037f 1978 seq_printf(seq, "FWM %08X %s %s",
ceec4c38 1979 svc->fwmark, sched->name,
26ec037f 1980 (svc->flags & IP_VS_SVC_F_ONEPACKET)?"ops ":"");
667a5f18 1981 }
1da177e4
LT		 1982
1983 if (svc->flags & IP_VS_SVC_F_PERSISTENT)
1984 seq_printf(seq, "persistent %d %08X\n",
1985 svc->timeout,
1986 ntohl(svc->netmask));
1987 else
1988 seq_putc(seq, '\n');
1989
413c2d04 1990 list_for_each_entry_rcu(dest, &svc->destinations, n_list) {
667a5f18
VB		 1991#ifdef CONFIG_IP_VS_IPV6
1992 if (dest->af == AF_INET6)
1993 seq_printf(seq,
5b095d98 1994 " -> [%pI6]:%04X"
667a5f18 1995 " %-7s %-6d %-10d %-10d\n",
38ff4fa4 1996 &dest->addr.in6,
667a5f18
VB		 1997 ntohs(dest->port),
1998 ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
1999 atomic_read(&dest->weight),
2000 atomic_read(&dest->activeconns),
2001 atomic_read(&dest->inactconns));
2002 else
2003#endif
2004 seq_printf(seq,
2005 " -> %08X:%04X "
2006 "%-7s %-6d %-10d %-10d\n",
2007 ntohl(dest->addr.ip),
2008 ntohs(dest->port),
2009 ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
2010 atomic_read(&dest->weight),
2011 atomic_read(&dest->activeconns),
2012 atomic_read(&dest->inactconns));
2013
1da177e4
LT		 2014 }
2015 }
2016 return 0;
2017}
2018
56b3d975 2019static const struct seq_operations ip_vs_info_seq_ops = {
1da177e4
LT		 2020 .start = ip_vs_info_seq_start,
2021 .next = ip_vs_info_seq_next,
2022 .stop = ip_vs_info_seq_stop,
2023 .show = ip_vs_info_seq_show,
2024};
2025
2026static int ip_vs_info_open(struct inode *inode, struct file *file)
2027{
fc723250 2028 return seq_open_net(inode, file, &ip_vs_info_seq_ops,
cf7732e4 2029 sizeof(struct ip_vs_iter));
1da177e4
LT		 2030}
2031
9a32144e 2032static const struct file_operations ip_vs_info_fops = {
1da177e4
LT		 2033 .owner = THIS_MODULE,
2034 .open = ip_vs_info_open,
2035 .read = seq_read,
2036 .llseek = seq_lseek,
0f08190f 2037 .release = seq_release_net,
1da177e4
LT		 2038};
2039
1da177e4
LT		 2040static int ip_vs_stats_show(struct seq_file *seq, void *v)
2041{
b17fc996 2042 struct net *net = seq_file_single_net(seq);
55a3d4e1 2043 struct ip_vs_stats_user show;
1da177e4
LT		 2044
2045/* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2046 seq_puts(seq,
2047 " Total Incoming Outgoing Incoming Outgoing\n");
2048 seq_printf(seq,
2049 " Conns Packets Packets Bytes Bytes\n");
2050
55a3d4e1
JA		 2051 ip_vs_copy_stats(&show, &net_ipvs(net)->tot_stats);
2052 seq_printf(seq, "%8X %8X %8X %16LX %16LX\n\n", show.conns,
2053 show.inpkts, show.outpkts,
2054 (unsigned long long) show.inbytes,
2055 (unsigned long long) show.outbytes);
1da177e4
LT		 2056
2057/* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2058 seq_puts(seq,
2059 " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
55a3d4e1
JA		 2060 seq_printf(seq, "%8X %8X %8X %16X %16X\n",
2061 show.cps, show.inpps, show.outpps,
2062 show.inbps, show.outbps);
1da177e4
LT		 2063
2064 return 0;
2065}
2066
2067static int ip_vs_stats_seq_open(struct inode *inode, struct file *file)
2068{
fc723250 2069 return single_open_net(inode, file, ip_vs_stats_show);
1da177e4
LT		 2070}
2071
9a32144e 2072static const struct file_operations ip_vs_stats_fops = {
1da177e4
LT		 2073 .owner = THIS_MODULE,
2074 .open = ip_vs_stats_seq_open,
2075 .read = seq_read,
2076 .llseek = seq_lseek,
0f08190f 2077 .release = single_release_net,
1da177e4
LT		 2078};
2079
b17fc996
HS		 2080static int ip_vs_stats_percpu_show(struct seq_file *seq, void *v)
2081{
2082 struct net *net = seq_file_single_net(seq);
2a0751af 2083 struct ip_vs_stats *tot_stats = &net_ipvs(net)->tot_stats;
371990ee 2084 struct ip_vs_cpu_stats __percpu *cpustats = tot_stats->cpustats;
ea9f22cc 2085 struct ip_vs_stats_user rates;
b17fc996
HS		 2086 int i;
2087
2088/* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2089 seq_puts(seq,
2090 " Total Incoming Outgoing Incoming Outgoing\n");
2091 seq_printf(seq,
2092 "CPU Conns Packets Packets Bytes Bytes\n");
2093
2094 for_each_possible_cpu(i) {
2a0751af
JA		 2095 struct ip_vs_cpu_stats *u = per_cpu_ptr(cpustats, i);
2096 unsigned int start;
2097 __u64 inbytes, outbytes;
2098
2099 do {
57a7744e 2100 start = u64_stats_fetch_begin_irq(&u->syncp);
2a0751af
JA		 2101 inbytes = u->ustats.inbytes;
2102 outbytes = u->ustats.outbytes;
57a7744e 2103 } while (u64_stats_fetch_retry_irq(&u->syncp, start));
2a0751af 2104
b17fc996 2105 seq_printf(seq, "%3X %8X %8X %8X %16LX %16LX\n",
2a0751af
JA		 2106 i, u->ustats.conns, u->ustats.inpkts,
2107 u->ustats.outpkts, (__u64)inbytes,
2108 (__u64)outbytes);
b17fc996
HS		 2109 }
2110
2111 spin_lock_bh(&tot_stats->lock);
ea9f22cc 2112
b17fc996
HS		 2113 seq_printf(seq, " ~ %8X %8X %8X %16LX %16LX\n\n",
2114 tot_stats->ustats.conns, tot_stats->ustats.inpkts,
2115 tot_stats->ustats.outpkts,
2116 (unsigned long long) tot_stats->ustats.inbytes,
2117 (unsigned long long) tot_stats->ustats.outbytes);
2118
ea9f22cc
JA		 2119 ip_vs_read_estimator(&rates, tot_stats);
2120
2121 spin_unlock_bh(&tot_stats->lock);
2122
b17fc996
HS		 2123/* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2124 seq_puts(seq,
2125 " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
2126 seq_printf(seq, " %8X %8X %8X %16X %16X\n",
ea9f22cc
JA		 2127 rates.cps,
2128 rates.inpps,
2129 rates.outpps,
2130 rates.inbps,
2131 rates.outbps);
b17fc996
HS		 2132
2133 return 0;
2134}
2135
2136static int ip_vs_stats_percpu_seq_open(struct inode *inode, struct file *file)
2137{
2138 return single_open_net(inode, file, ip_vs_stats_percpu_show);
2139}
2140
2141static const struct file_operations ip_vs_stats_percpu_fops = {
2142 .owner = THIS_MODULE,
2143 .open = ip_vs_stats_percpu_seq_open,
2144 .read = seq_read,
2145 .llseek = seq_lseek,
0f08190f 2146 .release = single_release_net,
b17fc996 2147};
1da177e4
LT		 2148#endif
2149
2150/*
2151 * Set timeout values for tcp tcpfin udp in the timeout_table.
2152 */
9330419d 2153static int ip_vs_set_timeout(struct net *net, struct ip_vs_timeout_user *u)
1da177e4 2154{
091bb34c 2155#if defined(CONFIG_IP_VS_PROTO_TCP) || defined(CONFIG_IP_VS_PROTO_UDP)
9330419d 2156 struct ip_vs_proto_data *pd;
091bb34c 2157#endif
9330419d 2158
1da177e4
LT		 2159 IP_VS_DBG(2, "Setting timeout tcp:%d tcpfin:%d udp:%d\n",
2160 u->tcp_timeout,
2161 u->tcp_fin_timeout,
2162 u->udp_timeout);
2163
2164#ifdef CONFIG_IP_VS_PROTO_TCP
2165 if (u->tcp_timeout) {
9330419d
HS		 2166 pd = ip_vs_proto_data_get(net, IPPROTO_TCP);
2167 pd->timeout_table[IP_VS_TCP_S_ESTABLISHED]
1da177e4
LT		 2168 = u->tcp_timeout * HZ;
2169 }
2170
2171 if (u->tcp_fin_timeout) {
9330419d
HS		 2172 pd = ip_vs_proto_data_get(net, IPPROTO_TCP);
2173 pd->timeout_table[IP_VS_TCP_S_FIN_WAIT]
1da177e4
LT		 2174 = u->tcp_fin_timeout * HZ;
2175 }
2176#endif
2177
2178#ifdef CONFIG_IP_VS_PROTO_UDP
2179 if (u->udp_timeout) {
9330419d
HS		 2180 pd = ip_vs_proto_data_get(net, IPPROTO_UDP);
2181 pd->timeout_table[IP_VS_UDP_S_NORMAL]
1da177e4
LT		 2182 = u->udp_timeout * HZ;
2183 }
2184#endif
2185 return 0;
2186}
2187
5fcf0cf6 2188#define CMDID(cmd) (cmd - IP_VS_BASE_CTL)
1da177e4 2189
5fcf0cf6
JA		 2190struct ip_vs_svcdest_user {
2191 struct ip_vs_service_user s;
2192 struct ip_vs_dest_user d;
1da177e4
LT		 2193};
2194
5fcf0cf6
JA		 2195static const unsigned char set_arglen[CMDID(IP_VS_SO_SET_MAX) + 1] = {
2196 [CMDID(IP_VS_SO_SET_ADD)] = sizeof(struct ip_vs_service_user),
2197 [CMDID(IP_VS_SO_SET_EDIT)] = sizeof(struct ip_vs_service_user),
2198 [CMDID(IP_VS_SO_SET_DEL)] = sizeof(struct ip_vs_service_user),
2199 [CMDID(IP_VS_SO_SET_ADDDEST)] = sizeof(struct ip_vs_svcdest_user),
2200 [CMDID(IP_VS_SO_SET_DELDEST)] = sizeof(struct ip_vs_svcdest_user),
2201 [CMDID(IP_VS_SO_SET_EDITDEST)] = sizeof(struct ip_vs_svcdest_user),
2202 [CMDID(IP_VS_SO_SET_TIMEOUT)] = sizeof(struct ip_vs_timeout_user),
2203 [CMDID(IP_VS_SO_SET_STARTDAEMON)] = sizeof(struct ip_vs_daemon_user),
2204 [CMDID(IP_VS_SO_SET_STOPDAEMON)] = sizeof(struct ip_vs_daemon_user),
2205 [CMDID(IP_VS_SO_SET_ZERO)] = sizeof(struct ip_vs_service_user),
2206};
2207
2208union ip_vs_set_arglen {
2209 struct ip_vs_service_user field_IP_VS_SO_SET_ADD;
2210 struct ip_vs_service_user field_IP_VS_SO_SET_EDIT;
2211 struct ip_vs_service_user field_IP_VS_SO_SET_DEL;
2212 struct ip_vs_svcdest_user field_IP_VS_SO_SET_ADDDEST;
2213 struct ip_vs_svcdest_user field_IP_VS_SO_SET_DELDEST;
2214 struct ip_vs_svcdest_user field_IP_VS_SO_SET_EDITDEST;
2215 struct ip_vs_timeout_user field_IP_VS_SO_SET_TIMEOUT;
2216 struct ip_vs_daemon_user field_IP_VS_SO_SET_STARTDAEMON;
2217 struct ip_vs_daemon_user field_IP_VS_SO_SET_STOPDAEMON;
2218 struct ip_vs_service_user field_IP_VS_SO_SET_ZERO;
2219};
2220
2221#define MAX_SET_ARGLEN sizeof(union ip_vs_set_arglen)
2222
c860c6b1
JV		 2223static void ip_vs_copy_usvc_compat(struct ip_vs_service_user_kern *usvc,
2224 struct ip_vs_service_user *usvc_compat)
2225{
0d1e71b0
SH		 2226 memset(usvc, 0, sizeof(*usvc));
2227
c860c6b1
JV		 2228 usvc->af = AF_INET;
2229 usvc->protocol = usvc_compat->protocol;
2230 usvc->addr.ip = usvc_compat->addr;
2231 usvc->port = usvc_compat->port;
2232 usvc->fwmark = usvc_compat->fwmark;
2233
2234 /* Deep copy of sched_name is not needed here */
2235 usvc->sched_name = usvc_compat->sched_name;
2236
2237 usvc->flags = usvc_compat->flags;
2238 usvc->timeout = usvc_compat->timeout;
2239 usvc->netmask = usvc_compat->netmask;
2240}
2241
2242static void ip_vs_copy_udest_compat(struct ip_vs_dest_user_kern *udest,
2243 struct ip_vs_dest_user *udest_compat)
2244{
0d1e71b0
SH		 2245 memset(udest, 0, sizeof(*udest));
2246
c860c6b1
JV		 2247 udest->addr.ip = udest_compat->addr;
2248 udest->port = udest_compat->port;
2249 udest->conn_flags = udest_compat->conn_flags;
2250 udest->weight = udest_compat->weight;
2251 udest->u_threshold = udest_compat->u_threshold;
2252 udest->l_threshold = udest_compat->l_threshold;
6cff339b 2253 udest->af = AF_INET;
c860c6b1
JV		 2254}
2255
1da177e4
LT		 2256static int
2257do_ip_vs_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len)
2258{
fc723250 2259 struct net *net = sock_net(sk);
1da177e4 2260 int ret;
5fcf0cf6 2261 unsigned char arg[MAX_SET_ARGLEN];
c860c6b1
JV		 2262 struct ip_vs_service_user *usvc_compat;
2263 struct ip_vs_service_user_kern usvc;
1da177e4 2264 struct ip_vs_service *svc;
c860c6b1
JV		 2265 struct ip_vs_dest_user *udest_compat;
2266 struct ip_vs_dest_user_kern udest;
ae1d48b2 2267 struct netns_ipvs *ipvs = net_ipvs(net);
1da177e4 2268
5fcf0cf6 2269 BUILD_BUG_ON(sizeof(arg) > 255);
df008c91 2270 if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
1da177e4
LT		 2271 return -EPERM;
2272
04bcef2a
AV		 2273 if (cmd < IP_VS_BASE_CTL || cmd > IP_VS_SO_SET_MAX)
2274 return -EINVAL;
5fcf0cf6
JA		 2275 if (len != set_arglen[CMDID(cmd)]) {
2276 IP_VS_DBG(1, "set_ctl: len %u != %u\n",
2277 len, set_arglen[CMDID(cmd)]);
1da177e4
LT		 2278 return -EINVAL;
2279 }
2280
2281 if (copy_from_user(arg, user, len) != 0)
2282 return -EFAULT;
2283
2284 /* increase the module use count */
2285 ip_vs_use_count_inc();
2286
ae1d48b2
HS		 2287 /* Handle daemons since they have another lock */
2288 if (cmd == IP_VS_SO_SET_STARTDAEMON ||
2289 cmd == IP_VS_SO_SET_STOPDAEMON) {
2290 struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg;
2291
7926dbfa 2292 mutex_lock(&ipvs->sync_mutex);
ae1d48b2
HS		 2293 if (cmd == IP_VS_SO_SET_STARTDAEMON)
2294 ret = start_sync_thread(net, dm->state, dm->mcast_ifn,
2295 dm->syncid);
2296 else
2297 ret = stop_sync_thread(net, dm->state);
2298 mutex_unlock(&ipvs->sync_mutex);
2299 goto out_dec;
2300 }
2301
7926dbfa 2302 mutex_lock(&__ip_vs_mutex);
1da177e4
LT		 2303 if (cmd == IP_VS_SO_SET_FLUSH) {
2304 /* Flush the virtual service */
578bc3ef 2305 ret = ip_vs_flush(net, false);
1da177e4
LT		 2306 goto out_unlock;
2307 } else if (cmd == IP_VS_SO_SET_TIMEOUT) {
2308 /* Set timeout values for (tcp tcpfin udp) */
9330419d 2309 ret = ip_vs_set_timeout(net, (struct ip_vs_timeout_user *)arg);
1da177e4 2310 goto out_unlock;
1da177e4
LT		 2311 }
2312
c860c6b1
JV		 2313 usvc_compat = (struct ip_vs_service_user *)arg;
2314 udest_compat = (struct ip_vs_dest_user *)(usvc_compat + 1);
2315
2316 /* We only use the new structs internally, so copy userspace compat
2317 * structs to extended internal versions */
2318 ip_vs_copy_usvc_compat(&usvc, usvc_compat);
2319 ip_vs_copy_udest_compat(&udest, udest_compat);
1da177e4
LT		 2320
2321 if (cmd == IP_VS_SO_SET_ZERO) {
2322 /* if no service address is set, zero counters in all */
c860c6b1 2323 if (!usvc.fwmark && !usvc.addr.ip && !usvc.port) {
fc723250 2324 ret = ip_vs_zero_all(net);
1da177e4
LT		 2325 goto out_unlock;
2326 }
2327 }
2328
2906f66a
VMR		 2329 /* Check for valid protocol: TCP or UDP or SCTP, even for fwmark!=0 */
2330 if (usvc.protocol != IPPROTO_TCP && usvc.protocol != IPPROTO_UDP &&
2331 usvc.protocol != IPPROTO_SCTP) {
1e3e238e
HE		 2332 pr_err("set_ctl: invalid protocol: %d %pI4:%d %s\n",
2333 usvc.protocol, &usvc.addr.ip,
2334 ntohs(usvc.port), usvc.sched_name);
1da177e4
LT		 2335 ret = -EFAULT;
2336 goto out_unlock;
2337 }
2338
2339 /* Lookup the exact service by <protocol, addr, port> or fwmark */
ceec4c38 2340 rcu_read_lock();
c860c6b1 2341 if (usvc.fwmark == 0)
fc723250 2342 svc = __ip_vs_service_find(net, usvc.af, usvc.protocol,
26c15cfd 2343 &usvc.addr, usvc.port);
1da177e4 2344 else
fc723250 2345 svc = __ip_vs_svc_fwm_find(net, usvc.af, usvc.fwmark);
ceec4c38 2346 rcu_read_unlock();
1da177e4
LT		 2347
2348 if (cmd != IP_VS_SO_SET_ADD
c860c6b1 2349 && (svc == NULL || svc->protocol != usvc.protocol)) {
1da177e4 2350 ret = -ESRCH;
26c15cfd 2351 goto out_unlock;
1da177e4
LT		 2352 }
2353
2354 switch (cmd) {
2355 case IP_VS_SO_SET_ADD:
2356 if (svc != NULL)
2357 ret = -EEXIST;
2358 else
fc723250 2359 ret = ip_vs_add_service(net, &usvc, &svc);
1da177e4
LT		 2360 break;
2361 case IP_VS_SO_SET_EDIT:
c860c6b1 2362 ret = ip_vs_edit_service(svc, &usvc);
1da177e4
LT		 2363 break;
2364 case IP_VS_SO_SET_DEL:
2365 ret = ip_vs_del_service(svc);
2366 if (!ret)
2367 goto out_unlock;
2368 break;
2369 case IP_VS_SO_SET_ZERO:
2370 ret = ip_vs_zero_service(svc);
2371 break;
2372 case IP_VS_SO_SET_ADDDEST:
c860c6b1 2373 ret = ip_vs_add_dest(svc, &udest);
1da177e4
LT		 2374 break;
2375 case IP_VS_SO_SET_EDITDEST:
c860c6b1 2376 ret = ip_vs_edit_dest(svc, &udest);
1da177e4
LT		 2377 break;
2378 case IP_VS_SO_SET_DELDEST:
c860c6b1 2379 ret = ip_vs_del_dest(svc, &udest);
1da177e4
LT		 2380 break;
2381 default:
2382 ret = -EINVAL;
2383 }
2384
1da177e4 2385 out_unlock:
14cc3e2b 2386 mutex_unlock(&__ip_vs_mutex);
1da177e4
LT		 2387 out_dec:
2388 /* decrease the module use count */
2389 ip_vs_use_count_dec();
2390
2391 return ret;
2392}
2393
2394
1da177e4
LT		 2395static void
2396ip_vs_copy_service(struct ip_vs_service_entry *dst, struct ip_vs_service *src)
2397{
ceec4c38
JA		 2398 struct ip_vs_scheduler *sched;
2399
2400 sched = rcu_dereference_protected(src->scheduler, 1);
1da177e4 2401 dst->protocol = src->protocol;
e7ade46a 2402 dst->addr = src->addr.ip;
1da177e4
LT		 2403 dst->port = src->port;
2404 dst->fwmark = src->fwmark;
ceec4c38 2405 strlcpy(dst->sched_name, sched->name, sizeof(dst->sched_name));
1da177e4
LT		 2406 dst->flags = src->flags;
2407 dst->timeout = src->timeout / HZ;
2408 dst->netmask = src->netmask;
2409 dst->num_dests = src->num_dests;
2410 ip_vs_copy_stats(&dst->stats, &src->stats);
2411}
2412
2413static inline int
fc723250
HS		 2414__ip_vs_get_service_entries(struct net *net,
2415 const struct ip_vs_get_services *get,
1da177e4
LT		 2416 struct ip_vs_get_services __user *uptr)
2417{
2418 int idx, count=0;
2419 struct ip_vs_service *svc;
2420 struct ip_vs_service_entry entry;
2421 int ret = 0;
2422
2423 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38 2424 hlist_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
f94fd041 2425 /* Only expose IPv4 entries to old interface */
fc723250 2426 if (svc->af != AF_INET || !net_eq(svc->net, net))
f94fd041
JV		 2427 continue;
2428
1da177e4
LT		 2429 if (count >= get->num_services)
2430 goto out;
4da62fc7 2431 memset(&entry, 0, sizeof(entry));
1da177e4
LT		 2432 ip_vs_copy_service(&entry, svc);
2433 if (copy_to_user(&uptr->entrytable[count],
2434 &entry, sizeof(entry))) {
2435 ret = -EFAULT;
2436 goto out;
2437 }
2438 count++;
2439 }
2440 }
2441
2442 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38 2443 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
f94fd041 2444 /* Only expose IPv4 entries to old interface */
fc723250 2445 if (svc->af != AF_INET || !net_eq(svc->net, net))
f94fd041
JV		 2446 continue;
2447
1da177e4
LT		 2448 if (count >= get->num_services)
2449 goto out;
4da62fc7 2450 memset(&entry, 0, sizeof(entry));
1da177e4
LT		 2451 ip_vs_copy_service(&entry, svc);
2452 if (copy_to_user(&uptr->entrytable[count],
2453 &entry, sizeof(entry))) {
2454 ret = -EFAULT;
2455 goto out;
2456 }
2457 count++;
2458 }
2459 }
552ad65a 2460out:
1da177e4
LT		 2461 return ret;
2462}
2463
2464static inline int
fc723250 2465__ip_vs_get_dest_entries(struct net *net, const struct ip_vs_get_dests *get,
1da177e4
LT		 2466 struct ip_vs_get_dests __user *uptr)
2467{
2468 struct ip_vs_service *svc;
b18610de 2469 union nf_inet_addr addr = { .ip = get->addr };
1da177e4
LT		 2470 int ret = 0;
2471
ceec4c38 2472 rcu_read_lock();
1da177e4 2473 if (get->fwmark)
fc723250 2474 svc = __ip_vs_svc_fwm_find(net, AF_INET, get->fwmark);
1da177e4 2475 else
fc723250 2476 svc = __ip_vs_service_find(net, AF_INET, get->protocol, &addr,
26c15cfd 2477 get->port);
ceec4c38 2478 rcu_read_unlock();
b18610de 2479
1da177e4
LT		 2480 if (svc) {
2481 int count = 0;
2482 struct ip_vs_dest *dest;
2483 struct ip_vs_dest_entry entry;
2484
a8241c63 2485 memset(&entry, 0, sizeof(entry));
1da177e4
LT		 2486 list_for_each_entry(dest, &svc->destinations, n_list) {
2487 if (count >= get->num_dests)
2488 break;
2489
6cff339b
AG		 2490 /* Cannot expose heterogeneous members via sockopt
2491 * interface
2492 */
2493 if (dest->af != svc->af)
2494 continue;
2495
e7ade46a 2496 entry.addr = dest->addr.ip;
1da177e4
LT		 2497 entry.port = dest->port;
2498 entry.conn_flags = atomic_read(&dest->conn_flags);
2499 entry.weight = atomic_read(&dest->weight);
2500 entry.u_threshold = dest->u_threshold;
2501 entry.l_threshold = dest->l_threshold;
2502 entry.activeconns = atomic_read(&dest->activeconns);
2503 entry.inactconns = atomic_read(&dest->inactconns);
2504 entry.persistconns = atomic_read(&dest->persistconns);
2505 ip_vs_copy_stats(&entry.stats, &dest->stats);
2506 if (copy_to_user(&uptr->entrytable[count],
2507 &entry, sizeof(entry))) {
2508 ret = -EFAULT;
2509 break;
2510 }
2511 count++;
2512 }
1da177e4
LT		 2513 } else
2514 ret = -ESRCH;
2515 return ret;
2516}
2517
2518static inline void
9330419d 2519__ip_vs_get_timeouts(struct net *net, struct ip_vs_timeout_user *u)
1da177e4 2520{
091bb34c 2521#if defined(CONFIG_IP_VS_PROTO_TCP) || defined(CONFIG_IP_VS_PROTO_UDP)
9330419d 2522 struct ip_vs_proto_data *pd;
091bb34c 2523#endif
9330419d 2524
b61a602e
AB		 2525 memset(u, 0, sizeof (*u));
2526
1da177e4 2527#ifdef CONFIG_IP_VS_PROTO_TCP
9330419d
HS		 2528 pd = ip_vs_proto_data_get(net, IPPROTO_TCP);
2529 u->tcp_timeout = pd->timeout_table[IP_VS_TCP_S_ESTABLISHED] / HZ;
2530 u->tcp_fin_timeout = pd->timeout_table[IP_VS_TCP_S_FIN_WAIT] / HZ;
1da177e4
LT		 2531#endif
2532#ifdef CONFIG_IP_VS_PROTO_UDP
9330419d 2533 pd = ip_vs_proto_data_get(net, IPPROTO_UDP);
1da177e4 2534 u->udp_timeout =
9330419d 2535 pd->timeout_table[IP_VS_UDP_S_NORMAL] / HZ;
1da177e4
LT		 2536#endif
2537}
2538
5fcf0cf6
JA		 2539static const unsigned char get_arglen[CMDID(IP_VS_SO_GET_MAX) + 1] = {
2540 [CMDID(IP_VS_SO_GET_VERSION)] = 64,
2541 [CMDID(IP_VS_SO_GET_INFO)] = sizeof(struct ip_vs_getinfo),
2542 [CMDID(IP_VS_SO_GET_SERVICES)] = sizeof(struct ip_vs_get_services),
2543 [CMDID(IP_VS_SO_GET_SERVICE)] = sizeof(struct ip_vs_service_entry),
2544 [CMDID(IP_VS_SO_GET_DESTS)] = sizeof(struct ip_vs_get_dests),
2545 [CMDID(IP_VS_SO_GET_TIMEOUT)] = sizeof(struct ip_vs_timeout_user),
2546 [CMDID(IP_VS_SO_GET_DAEMON)] = 2 * sizeof(struct ip_vs_daemon_user),
2547};
1da177e4 2548
5fcf0cf6
JA		 2549union ip_vs_get_arglen {
2550 char field_IP_VS_SO_GET_VERSION[64];
2551 struct ip_vs_getinfo field_IP_VS_SO_GET_INFO;
2552 struct ip_vs_get_services field_IP_VS_SO_GET_SERVICES;
2553 struct ip_vs_service_entry field_IP_VS_SO_GET_SERVICE;
2554 struct ip_vs_get_dests field_IP_VS_SO_GET_DESTS;
2555 struct ip_vs_timeout_user field_IP_VS_SO_GET_TIMEOUT;
2556 struct ip_vs_daemon_user field_IP_VS_SO_GET_DAEMON[2];
1da177e4
LT		 2557};
2558
5fcf0cf6
JA		 2559#define MAX_GET_ARGLEN sizeof(union ip_vs_get_arglen)
2560
1da177e4
LT		 2561static int
2562do_ip_vs_get_ctl(struct sock *sk, int cmd, void __user *user, int *len)
2563{
5fcf0cf6 2564 unsigned char arg[MAX_GET_ARGLEN];
1da177e4 2565 int ret = 0;
04bcef2a 2566 unsigned int copylen;
fc723250 2567 struct net *net = sock_net(sk);
f131315f 2568 struct netns_ipvs *ipvs = net_ipvs(net);
1da177e4 2569
fc723250 2570 BUG_ON(!net);
5fcf0cf6 2571 BUILD_BUG_ON(sizeof(arg) > 255);
df008c91 2572 if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
1da177e4
LT		 2573 return -EPERM;
2574
04bcef2a
AV		 2575 if (cmd < IP_VS_BASE_CTL || cmd > IP_VS_SO_GET_MAX)
2576 return -EINVAL;
2577
5fcf0cf6
JA		 2578 copylen = get_arglen[CMDID(cmd)];
2579 if (*len < (int) copylen) {
2580 IP_VS_DBG(1, "get_ctl: len %d < %u\n", *len, copylen);
1da177e4
LT		 2581 return -EINVAL;
2582 }
2583
04bcef2a 2584 if (copy_from_user(arg, user, copylen) != 0)
1da177e4 2585 return -EFAULT;
ae1d48b2
HS		 2586 /*
2587 * Handle daemons first since it has its own locking
2588 */
2589 if (cmd == IP_VS_SO_GET_DAEMON) {
2590 struct ip_vs_daemon_user d[2];
2591
2592 memset(&d, 0, sizeof(d));
7926dbfa 2593 mutex_lock(&ipvs->sync_mutex);
ae1d48b2
HS		 2594 if (ipvs->sync_state & IP_VS_STATE_MASTER) {
2595 d[0].state = IP_VS_STATE_MASTER;
2596 strlcpy(d[0].mcast_ifn, ipvs->master_mcast_ifn,
2597 sizeof(d[0].mcast_ifn));
2598 d[0].syncid = ipvs->master_syncid;
2599 }
2600 if (ipvs->sync_state & IP_VS_STATE_BACKUP) {
2601 d[1].state = IP_VS_STATE_BACKUP;
2602 strlcpy(d[1].mcast_ifn, ipvs->backup_mcast_ifn,
2603 sizeof(d[1].mcast_ifn));
2604 d[1].syncid = ipvs->backup_syncid;
2605 }
2606 if (copy_to_user(user, &d, sizeof(d)) != 0)
2607 ret = -EFAULT;
2608 mutex_unlock(&ipvs->sync_mutex);
2609 return ret;
2610 }
1da177e4 2611
7926dbfa 2612 mutex_lock(&__ip_vs_mutex);
1da177e4
LT		 2613 switch (cmd) {
2614 case IP_VS_SO_GET_VERSION:
2615 {
2616 char buf[64];
2617
2618 sprintf(buf, "IP Virtual Server version %d.%d.%d (size=%d)",
6f7edb48 2619 NVERSION(IP_VS_VERSION_CODE), ip_vs_conn_tab_size);
1da177e4
LT		 2620 if (copy_to_user(user, buf, strlen(buf)+1) != 0) {
2621 ret = -EFAULT;
2622 goto out;
2623 }
2624 *len = strlen(buf)+1;
2625 }
2626 break;
2627
2628 case IP_VS_SO_GET_INFO:
2629 {
2630 struct ip_vs_getinfo info;
2631 info.version = IP_VS_VERSION_CODE;
6f7edb48 2632 info.size = ip_vs_conn_tab_size;
a0840e2e 2633 info.num_services = ipvs->num_services;
1da177e4
LT		 2634 if (copy_to_user(user, &info, sizeof(info)) != 0)
2635 ret = -EFAULT;
2636 }
2637 break;
2638
2639 case IP_VS_SO_GET_SERVICES:
2640 {
2641 struct ip_vs_get_services *get;
2642 int size;
2643
2644 get = (struct ip_vs_get_services *)arg;
2645 size = sizeof(*get) +
2646 sizeof(struct ip_vs_service_entry) * get->num_services;
2647 if (*len != size) {
1e3e238e 2648 pr_err("length: %u != %u\n", *len, size);
1da177e4
LT		 2649 ret = -EINVAL;
2650 goto out;
2651 }
fc723250 2652 ret = __ip_vs_get_service_entries(net, get, user);
1da177e4
LT		 2653 }
2654 break;
2655
2656 case IP_VS_SO_GET_SERVICE:
2657 {
2658 struct ip_vs_service_entry *entry;
2659 struct ip_vs_service *svc;
b18610de 2660 union nf_inet_addr addr;
1da177e4
LT		 2661
2662 entry = (struct ip_vs_service_entry *)arg;
b18610de 2663 addr.ip = entry->addr;
ceec4c38 2664 rcu_read_lock();
1da177e4 2665 if (entry->fwmark)
fc723250 2666 svc = __ip_vs_svc_fwm_find(net, AF_INET, entry->fwmark);
1da177e4 2667 else
fc723250
HS		 2668 svc = __ip_vs_service_find(net, AF_INET,
2669 entry->protocol, &addr,
2670 entry->port);
ceec4c38 2671 rcu_read_unlock();
1da177e4
LT		 2672 if (svc) {
2673 ip_vs_copy_service(entry, svc);
2674 if (copy_to_user(user, entry, sizeof(*entry)) != 0)
2675 ret = -EFAULT;
1da177e4
LT		 2676 } else
2677 ret = -ESRCH;
2678 }
2679 break;
2680
2681 case IP_VS_SO_GET_DESTS:
2682 {
2683 struct ip_vs_get_dests *get;
2684 int size;
2685
2686 get = (struct ip_vs_get_dests *)arg;
2687 size = sizeof(*get) +
2688 sizeof(struct ip_vs_dest_entry) * get->num_dests;
2689 if (*len != size) {
1e3e238e 2690 pr_err("length: %u != %u\n", *len, size);
1da177e4
LT		 2691 ret = -EINVAL;
2692 goto out;
2693 }
fc723250 2694 ret = __ip_vs_get_dest_entries(net, get, user);
1da177e4
LT		 2695 }
2696 break;
2697
2698 case IP_VS_SO_GET_TIMEOUT:
2699 {
2700 struct ip_vs_timeout_user t;
2701
9330419d 2702 __ip_vs_get_timeouts(net, &t);
1da177e4
LT		 2703 if (copy_to_user(user, &t, sizeof(t)) != 0)
2704 ret = -EFAULT;
2705 }
2706 break;
2707
1da177e4
LT		 2708 default:
2709 ret = -EINVAL;
2710 }
2711
552ad65a 2712out:
14cc3e2b 2713 mutex_unlock(&__ip_vs_mutex);
1da177e4
LT		 2714 return ret;
2715}
2716
2717
2718static struct nf_sockopt_ops ip_vs_sockopts = {
2719 .pf = PF_INET,
2720 .set_optmin = IP_VS_BASE_CTL,
2721 .set_optmax = IP_VS_SO_SET_MAX+1,
2722 .set = do_ip_vs_set_ctl,
2723 .get_optmin = IP_VS_BASE_CTL,
2724 .get_optmax = IP_VS_SO_GET_MAX+1,
2725 .get = do_ip_vs_get_ctl,
16fcec35 2726 .owner = THIS_MODULE,
1da177e4
LT		 2727};
2728
9a812198
JV		 2729/*
2730 * Generic Netlink interface
2731 */
2732
2733/* IPVS genetlink family */
2734static struct genl_family ip_vs_genl_family = {
2735 .id = GENL_ID_GENERATE,
2736 .hdrsize = 0,
2737 .name = IPVS_GENL_NAME,
2738 .version = IPVS_GENL_VERSION,
2739 .maxattr = IPVS_CMD_MAX,
c6d2d445 2740 .netnsok = true, /* Make ipvsadm to work on netns */
9a812198
JV		 2741};
2742
2743/* Policy used for first-level command attributes */
2744static const struct nla_policy ip_vs_cmd_policy[IPVS_CMD_ATTR_MAX + 1] = {
2745 [IPVS_CMD_ATTR_SERVICE] = { .type = NLA_NESTED },
2746 [IPVS_CMD_ATTR_DEST] = { .type = NLA_NESTED },
2747 [IPVS_CMD_ATTR_DAEMON] = { .type = NLA_NESTED },
2748 [IPVS_CMD_ATTR_TIMEOUT_TCP] = { .type = NLA_U32 },
2749 [IPVS_CMD_ATTR_TIMEOUT_TCP_FIN] = { .type = NLA_U32 },
2750 [IPVS_CMD_ATTR_TIMEOUT_UDP] = { .type = NLA_U32 },
2751};
2752
2753/* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DAEMON */
2754static const struct nla_policy ip_vs_daemon_policy[IPVS_DAEMON_ATTR_MAX + 1] = {
2755 [IPVS_DAEMON_ATTR_STATE] = { .type = NLA_U32 },
2756 [IPVS_DAEMON_ATTR_MCAST_IFN] = { .type = NLA_NUL_STRING,
2757 .len = IP_VS_IFNAME_MAXLEN },
2758 [IPVS_DAEMON_ATTR_SYNC_ID] = { .type = NLA_U32 },
2759};
2760
2761/* Policy used for attributes in nested attribute IPVS_CMD_ATTR_SERVICE */
2762static const struct nla_policy ip_vs_svc_policy[IPVS_SVC_ATTR_MAX + 1] = {
2763 [IPVS_SVC_ATTR_AF] = { .type = NLA_U16 },
2764 [IPVS_SVC_ATTR_PROTOCOL] = { .type = NLA_U16 },
2765 [IPVS_SVC_ATTR_ADDR] = { .type = NLA_BINARY,
2766 .len = sizeof(union nf_inet_addr) },
2767 [IPVS_SVC_ATTR_PORT] = { .type = NLA_U16 },
2768 [IPVS_SVC_ATTR_FWMARK] = { .type = NLA_U32 },
2769 [IPVS_SVC_ATTR_SCHED_NAME] = { .type = NLA_NUL_STRING,
2770 .len = IP_VS_SCHEDNAME_MAXLEN },
0d1e71b0
SH		 2771 [IPVS_SVC_ATTR_PE_NAME] = { .type = NLA_NUL_STRING,
2772 .len = IP_VS_PENAME_MAXLEN },
9a812198
JV		 2773 [IPVS_SVC_ATTR_FLAGS] = { .type = NLA_BINARY,
2774 .len = sizeof(struct ip_vs_flags) },
2775 [IPVS_SVC_ATTR_TIMEOUT] = { .type = NLA_U32 },
2776 [IPVS_SVC_ATTR_NETMASK] = { .type = NLA_U32 },
2777 [IPVS_SVC_ATTR_STATS] = { .type = NLA_NESTED },
2778};
2779
2780/* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DEST */
2781static const struct nla_policy ip_vs_dest_policy[IPVS_DEST_ATTR_MAX + 1] = {
2782 [IPVS_DEST_ATTR_ADDR] = { .type = NLA_BINARY,
2783 .len = sizeof(union nf_inet_addr) },
2784 [IPVS_DEST_ATTR_PORT] = { .type = NLA_U16 },
2785 [IPVS_DEST_ATTR_FWD_METHOD] = { .type = NLA_U32 },
2786 [IPVS_DEST_ATTR_WEIGHT] = { .type = NLA_U32 },
2787 [IPVS_DEST_ATTR_U_THRESH] = { .type = NLA_U32 },
2788 [IPVS_DEST_ATTR_L_THRESH] = { .type = NLA_U32 },
2789 [IPVS_DEST_ATTR_ACTIVE_CONNS] = { .type = NLA_U32 },
2790 [IPVS_DEST_ATTR_INACT_CONNS] = { .type = NLA_U32 },
2791 [IPVS_DEST_ATTR_PERSIST_CONNS] = { .type = NLA_U32 },
2792 [IPVS_DEST_ATTR_STATS] = { .type = NLA_NESTED },
6cff339b 2793 [IPVS_DEST_ATTR_ADDR_FAMILY] = { .type = NLA_U16 },
9a812198
JV		 2794};
2795
2796static int ip_vs_genl_fill_stats(struct sk_buff *skb, int container_type,
2797 struct ip_vs_stats *stats)
2798{
55a3d4e1 2799 struct ip_vs_stats_user ustats;
9a812198
JV		 2800 struct nlattr *nl_stats = nla_nest_start(skb, container_type);
2801 if (!nl_stats)
2802 return -EMSGSIZE;
2803
55a3d4e1 2804 ip_vs_copy_stats(&ustats, stats);
9a812198 2805
969e8e25
DM		 2806 if (nla_put_u32(skb, IPVS_STATS_ATTR_CONNS, ustats.conns) ||
2807 nla_put_u32(skb, IPVS_STATS_ATTR_INPKTS, ustats.inpkts) ||
2808 nla_put_u32(skb, IPVS_STATS_ATTR_OUTPKTS, ustats.outpkts) ||
2809 nla_put_u64(skb, IPVS_STATS_ATTR_INBYTES, ustats.inbytes) ||
2810 nla_put_u64(skb, IPVS_STATS_ATTR_OUTBYTES, ustats.outbytes) ||
2811 nla_put_u32(skb, IPVS_STATS_ATTR_CPS, ustats.cps) ||
2812 nla_put_u32(skb, IPVS_STATS_ATTR_INPPS, ustats.inpps) ||
2813 nla_put_u32(skb, IPVS_STATS_ATTR_OUTPPS, ustats.outpps) ||
2814 nla_put_u32(skb, IPVS_STATS_ATTR_INBPS, ustats.inbps) ||
2815 nla_put_u32(skb, IPVS_STATS_ATTR_OUTBPS, ustats.outbps))
2816 goto nla_put_failure;
9a812198
JV		 2817 nla_nest_end(skb, nl_stats);
2818
2819 return 0;
2820
2821nla_put_failure:
9a812198
JV		 2822 nla_nest_cancel(skb, nl_stats);
2823 return -EMSGSIZE;
2824}
2825
2826static int ip_vs_genl_fill_service(struct sk_buff *skb,
2827 struct ip_vs_service *svc)
2828{
ceec4c38 2829 struct ip_vs_scheduler *sched;
371990ee 2830 struct ip_vs_pe *pe;
9a812198
JV		 2831 struct nlattr *nl_service;
2832 struct ip_vs_flags flags = { .flags = svc->flags,
2833 .mask = ~0 };
2834
2835 nl_service = nla_nest_start(skb, IPVS_CMD_ATTR_SERVICE);
2836 if (!nl_service)
2837 return -EMSGSIZE;
2838
969e8e25
DM		 2839 if (nla_put_u16(skb, IPVS_SVC_ATTR_AF, svc->af))
2840 goto nla_put_failure;
9a812198 2841 if (svc->fwmark) {
969e8e25
DM		 2842 if (nla_put_u32(skb, IPVS_SVC_ATTR_FWMARK, svc->fwmark))
2843 goto nla_put_failure;
9a812198 2844 } else {
969e8e25
DM		 2845 if (nla_put_u16(skb, IPVS_SVC_ATTR_PROTOCOL, svc->protocol) ||
2846 nla_put(skb, IPVS_SVC_ATTR_ADDR, sizeof(svc->addr), &svc->addr) ||
0a925864 2847 nla_put_be16(skb, IPVS_SVC_ATTR_PORT, svc->port))
969e8e25 2848 goto nla_put_failure;
9a812198
JV		 2849 }
2850
ceec4c38 2851 sched = rcu_dereference_protected(svc->scheduler, 1);
371990ee 2852 pe = rcu_dereference_protected(svc->pe, 1);
ceec4c38 2853 if (nla_put_string(skb, IPVS_SVC_ATTR_SCHED_NAME, sched->name) ||
371990ee 2854 (pe && nla_put_string(skb, IPVS_SVC_ATTR_PE_NAME, pe->name)) ||
969e8e25
DM		 2855 nla_put(skb, IPVS_SVC_ATTR_FLAGS, sizeof(flags), &flags) ||
2856 nla_put_u32(skb, IPVS_SVC_ATTR_TIMEOUT, svc->timeout / HZ) ||
0a925864 2857 nla_put_be32(skb, IPVS_SVC_ATTR_NETMASK, svc->netmask))
969e8e25 2858 goto nla_put_failure;
9a812198
JV		 2859 if (ip_vs_genl_fill_stats(skb, IPVS_SVC_ATTR_STATS, &svc->stats))
2860 goto nla_put_failure;
2861
2862 nla_nest_end(skb, nl_service);
2863
2864 return 0;
2865
2866nla_put_failure:
2867 nla_nest_cancel(skb, nl_service);
2868 return -EMSGSIZE;
2869}
2870
2871static int ip_vs_genl_dump_service(struct sk_buff *skb,
2872 struct ip_vs_service *svc,
2873 struct netlink_callback *cb)
2874{
2875 void *hdr;
2876
15e47304 2877 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
9a812198
JV		 2878 &ip_vs_genl_family, NLM_F_MULTI,
2879 IPVS_CMD_NEW_SERVICE);
2880 if (!hdr)
2881 return -EMSGSIZE;
2882
2883 if (ip_vs_genl_fill_service(skb, svc) < 0)
2884 goto nla_put_failure;
2885
2886 return genlmsg_end(skb, hdr);
2887
2888nla_put_failure:
2889 genlmsg_cancel(skb, hdr);
2890 return -EMSGSIZE;
2891}
2892
2893static int ip_vs_genl_dump_services(struct sk_buff *skb,
2894 struct netlink_callback *cb)
2895{
2896 int idx = 0, i;
2897 int start = cb->args[0];
2898 struct ip_vs_service *svc;
fc723250 2899 struct net *net = skb_sknet(skb);
9a812198
JV		 2900
2901 mutex_lock(&__ip_vs_mutex);
2902 for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) {
ceec4c38 2903 hlist_for_each_entry(svc, &ip_vs_svc_table[i], s_list) {
fc723250 2904 if (++idx <= start || !net_eq(svc->net, net))
9a812198
JV		 2905 continue;
2906 if (ip_vs_genl_dump_service(skb, svc, cb) < 0) {
2907 idx--;
2908 goto nla_put_failure;
2909 }
2910 }
2911 }
2912
2913 for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) {
ceec4c38 2914 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[i], f_list) {
fc723250 2915 if (++idx <= start || !net_eq(svc->net, net))
9a812198
JV		 2916 continue;
2917 if (ip_vs_genl_dump_service(skb, svc, cb) < 0) {
2918 idx--;
2919 goto nla_put_failure;
2920 }
2921 }
2922 }
2923
2924nla_put_failure:
2925 mutex_unlock(&__ip_vs_mutex);
2926 cb->args[0] = idx;
2927
2928 return skb->len;
2929}
2930
fc723250
HS		 2931static int ip_vs_genl_parse_service(struct net *net,
2932 struct ip_vs_service_user_kern *usvc,
26c15cfd
JA		 2933 struct nlattr *nla, int full_entry,
2934 struct ip_vs_service **ret_svc)
9a812198
JV		 2935{
2936 struct nlattr *attrs[IPVS_SVC_ATTR_MAX + 1];
2937 struct nlattr *nla_af, *nla_port, *nla_fwmark, *nla_protocol, *nla_addr;
26c15cfd 2938 struct ip_vs_service *svc;
9a812198
JV		 2939
2940 /* Parse mandatory identifying service fields first */
2941 if (nla == NULL ||
2942 nla_parse_nested(attrs, IPVS_SVC_ATTR_MAX, nla, ip_vs_svc_policy))
2943 return -EINVAL;
2944
2945 nla_af = attrs[IPVS_SVC_ATTR_AF];
2946 nla_protocol = attrs[IPVS_SVC_ATTR_PROTOCOL];
2947 nla_addr = attrs[IPVS_SVC_ATTR_ADDR];
2948 nla_port = attrs[IPVS_SVC_ATTR_PORT];
2949 nla_fwmark = attrs[IPVS_SVC_ATTR_FWMARK];
2950
2951 if (!(nla_af && (nla_fwmark || (nla_port && nla_protocol && nla_addr))))
2952 return -EINVAL;
2953
258c8893
SH		 2954 memset(usvc, 0, sizeof(*usvc));
2955
c860c6b1 2956 usvc->af = nla_get_u16(nla_af);
f94fd041
JV		 2957#ifdef CONFIG_IP_VS_IPV6
2958 if (usvc->af != AF_INET && usvc->af != AF_INET6)
2959#else
2960 if (usvc->af != AF_INET)
2961#endif
9a812198
JV		 2962 return -EAFNOSUPPORT;
2963
2964 if (nla_fwmark) {
2965 usvc->protocol = IPPROTO_TCP;
2966 usvc->fwmark = nla_get_u32(nla_fwmark);
2967 } else {
2968 usvc->protocol = nla_get_u16(nla_protocol);
2969 nla_memcpy(&usvc->addr, nla_addr, sizeof(usvc->addr));
0a925864 2970 usvc->port = nla_get_be16(nla_port);
9a812198
JV		 2971 usvc->fwmark = 0;
2972 }
2973
ceec4c38 2974 rcu_read_lock();
26c15cfd 2975 if (usvc->fwmark)
fc723250 2976 svc = __ip_vs_svc_fwm_find(net, usvc->af, usvc->fwmark);
26c15cfd 2977 else
fc723250 2978 svc = __ip_vs_service_find(net, usvc->af, usvc->protocol,
26c15cfd 2979 &usvc->addr, usvc->port);
ceec4c38 2980 rcu_read_unlock();
26c15cfd
JA		 2981 *ret_svc = svc;
2982
9a812198
JV		 2983 /* If a full entry was requested, check for the additional fields */
2984 if (full_entry) {
0d1e71b0 2985 struct nlattr *nla_sched, *nla_flags, *nla_pe, *nla_timeout,
9a812198
JV		 2986 *nla_netmask;
2987 struct ip_vs_flags flags;
9a812198
JV		 2988
2989 nla_sched = attrs[IPVS_SVC_ATTR_SCHED_NAME];
0d1e71b0 2990 nla_pe = attrs[IPVS_SVC_ATTR_PE_NAME];
9a812198
JV		 2991 nla_flags = attrs[IPVS_SVC_ATTR_FLAGS];
2992 nla_timeout = attrs[IPVS_SVC_ATTR_TIMEOUT];
2993 nla_netmask = attrs[IPVS_SVC_ATTR_NETMASK];
2994
2995 if (!(nla_sched && nla_flags && nla_timeout && nla_netmask))
2996 return -EINVAL;
2997
2998 nla_memcpy(&flags, nla_flags, sizeof(flags));
2999
3000 /* prefill flags from service if it already exists */
26c15cfd 3001 if (svc)
9a812198 3002 usvc->flags = svc->flags;
9a812198
JV		 3003
3004 /* set new flags from userland */
3005 usvc->flags = (usvc->flags & ~flags.mask) |
3006 (flags.flags & flags.mask);
c860c6b1 3007 usvc->sched_name = nla_data(nla_sched);
0d1e71b0 3008 usvc->pe_name = nla_pe ? nla_data(nla_pe) : NULL;
9a812198 3009 usvc->timeout = nla_get_u32(nla_timeout);
0a925864 3010 usvc->netmask = nla_get_be32(nla_netmask);
9a812198
JV		 3011 }
3012
3013 return 0;
3014}
3015
fc723250
HS		 3016static struct ip_vs_service *ip_vs_genl_find_service(struct net *net,
3017 struct nlattr *nla)
9a812198 3018{
c860c6b1 3019 struct ip_vs_service_user_kern usvc;
26c15cfd 3020 struct ip_vs_service *svc;
9a812198
JV		 3021 int ret;
3022
fc723250 3023 ret = ip_vs_genl_parse_service(net, &usvc, nla, 0, &svc);
26c15cfd 3024 return ret ? ERR_PTR(ret) : svc;
9a812198
JV		 3025}
3026
3027static int ip_vs_genl_fill_dest(struct sk_buff *skb, struct ip_vs_dest *dest)
3028{
3029 struct nlattr *nl_dest;
3030
3031 nl_dest = nla_nest_start(skb, IPVS_CMD_ATTR_DEST);
3032 if (!nl_dest)
3033 return -EMSGSIZE;
3034
969e8e25 3035 if (nla_put(skb, IPVS_DEST_ATTR_ADDR, sizeof(dest->addr), &dest->addr) ||
0a925864 3036 nla_put_be16(skb, IPVS_DEST_ATTR_PORT, dest->port) ||
969e8e25
DM		 3037 nla_put_u32(skb, IPVS_DEST_ATTR_FWD_METHOD,
3038 (atomic_read(&dest->conn_flags) &
3039 IP_VS_CONN_F_FWD_MASK)) ||
3040 nla_put_u32(skb, IPVS_DEST_ATTR_WEIGHT,
3041 atomic_read(&dest->weight)) ||
3042 nla_put_u32(skb, IPVS_DEST_ATTR_U_THRESH, dest->u_threshold) ||
3043 nla_put_u32(skb, IPVS_DEST_ATTR_L_THRESH, dest->l_threshold) ||
3044 nla_put_u32(skb, IPVS_DEST_ATTR_ACTIVE_CONNS,
3045 atomic_read(&dest->activeconns)) ||
3046 nla_put_u32(skb, IPVS_DEST_ATTR_INACT_CONNS,
3047 atomic_read(&dest->inactconns)) ||
3048 nla_put_u32(skb, IPVS_DEST_ATTR_PERSIST_CONNS,
6cff339b
AG		 3049 atomic_read(&dest->persistconns)) ||
3050 nla_put_u16(skb, IPVS_DEST_ATTR_ADDR_FAMILY, dest->af))
969e8e25 3051 goto nla_put_failure;
9a812198
JV		 3052 if (ip_vs_genl_fill_stats(skb, IPVS_DEST_ATTR_STATS, &dest->stats))
3053 goto nla_put_failure;
3054
3055 nla_nest_end(skb, nl_dest);
3056
3057 return 0;
3058
3059nla_put_failure:
3060 nla_nest_cancel(skb, nl_dest);
3061 return -EMSGSIZE;
3062}
3063
3064static int ip_vs_genl_dump_dest(struct sk_buff *skb, struct ip_vs_dest *dest,
3065 struct netlink_callback *cb)
3066{
3067 void *hdr;
3068
15e47304 3069 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
9a812198
JV		 3070 &ip_vs_genl_family, NLM_F_MULTI,
3071 IPVS_CMD_NEW_DEST);
3072 if (!hdr)
3073 return -EMSGSIZE;
3074
3075 if (ip_vs_genl_fill_dest(skb, dest) < 0)
3076 goto nla_put_failure;
3077
3078 return genlmsg_end(skb, hdr);
3079
3080nla_put_failure:
3081 genlmsg_cancel(skb, hdr);
3082 return -EMSGSIZE;
3083}
3084
3085static int ip_vs_genl_dump_dests(struct sk_buff *skb,
3086 struct netlink_callback *cb)
3087{
3088 int idx = 0;
3089 int start = cb->args[0];
3090 struct ip_vs_service *svc;
3091 struct ip_vs_dest *dest;
3092 struct nlattr *attrs[IPVS_CMD_ATTR_MAX + 1];
a0840e2e 3093 struct net *net = skb_sknet(skb);
9a812198
JV		 3094
3095 mutex_lock(&__ip_vs_mutex);
3096
3097 /* Try to find the service for which to dump destinations */
3098 if (nlmsg_parse(cb->nlh, GENL_HDRLEN, attrs,
3099 IPVS_CMD_ATTR_MAX, ip_vs_cmd_policy))
3100 goto out_err;
3101
a0840e2e 3102
fc723250 3103 svc = ip_vs_genl_find_service(net, attrs[IPVS_CMD_ATTR_SERVICE]);
9a812198
JV		 3104 if (IS_ERR(svc) || svc == NULL)
3105 goto out_err;
3106
3107 /* Dump the destinations */
3108 list_for_each_entry(dest, &svc->destinations, n_list) {
3109 if (++idx <= start)
3110 continue;
3111 if (ip_vs_genl_dump_dest(skb, dest, cb) < 0) {
3112 idx--;
3113 goto nla_put_failure;
3114 }
3115 }
3116
3117nla_put_failure:
3118 cb->args[0] = idx;
9a812198
JV		 3119
3120out_err:
3121 mutex_unlock(&__ip_vs_mutex);
3122
3123 return skb->len;
3124}
3125
c860c6b1 3126static int ip_vs_genl_parse_dest(struct ip_vs_dest_user_kern *udest,
9a812198
JV		 3127 struct nlattr *nla, int full_entry)
3128{
3129 struct nlattr *attrs[IPVS_DEST_ATTR_MAX + 1];
3130 struct nlattr *nla_addr, *nla_port;
6cff339b 3131 struct nlattr *nla_addr_family;
9a812198
JV		 3132
3133 /* Parse mandatory identifying destination fields first */
3134 if (nla == NULL ||
3135 nla_parse_nested(attrs, IPVS_DEST_ATTR_MAX, nla, ip_vs_dest_policy))
3136 return -EINVAL;
3137
3138 nla_addr = attrs[IPVS_DEST_ATTR_ADDR];
3139 nla_port = attrs[IPVS_DEST_ATTR_PORT];
6cff339b 3140 nla_addr_family = attrs[IPVS_DEST_ATTR_ADDR_FAMILY];
9a812198
JV		 3141
3142 if (!(nla_addr && nla_port))
3143 return -EINVAL;
3144
258c8893
SH		 3145 memset(udest, 0, sizeof(*udest));
3146
9a812198 3147 nla_memcpy(&udest->addr, nla_addr, sizeof(udest->addr));
0a925864 3148 udest->port = nla_get_be16(nla_port);
9a812198 3149
6cff339b
AG		 3150 if (nla_addr_family)
3151 udest->af = nla_get_u16(nla_addr_family);
3152 else
3153 udest->af = 0;
3154
9a812198
JV		 3155 /* If a full entry was requested, check for the additional fields */
3156 if (full_entry) {
3157 struct nlattr *nla_fwd, *nla_weight, *nla_u_thresh,
3158 *nla_l_thresh;
3159
3160 nla_fwd = attrs[IPVS_DEST_ATTR_FWD_METHOD];
3161 nla_weight = attrs[IPVS_DEST_ATTR_WEIGHT];
3162 nla_u_thresh = attrs[IPVS_DEST_ATTR_U_THRESH];
3163 nla_l_thresh = attrs[IPVS_DEST_ATTR_L_THRESH];
3164
3165 if (!(nla_fwd && nla_weight && nla_u_thresh && nla_l_thresh))
3166 return -EINVAL;
3167
3168 udest->conn_flags = nla_get_u32(nla_fwd)
3169 & IP_VS_CONN_F_FWD_MASK;
3170 udest->weight = nla_get_u32(nla_weight);
3171 udest->u_threshold = nla_get_u32(nla_u_thresh);
3172 udest->l_threshold = nla_get_u32(nla_l_thresh);
3173 }
3174
3175 return 0;
3176}
3177
0a925864
JA		 3178static int ip_vs_genl_fill_daemon(struct sk_buff *skb, __u32 state,
3179 const char *mcast_ifn, __u32 syncid)
9a812198
JV		 3180{
3181 struct nlattr *nl_daemon;
3182
3183 nl_daemon = nla_nest_start(skb, IPVS_CMD_ATTR_DAEMON);
3184 if (!nl_daemon)
3185 return -EMSGSIZE;
3186
969e8e25
DM		 3187 if (nla_put_u32(skb, IPVS_DAEMON_ATTR_STATE, state) ||
3188 nla_put_string(skb, IPVS_DAEMON_ATTR_MCAST_IFN, mcast_ifn) ||
3189 nla_put_u32(skb, IPVS_DAEMON_ATTR_SYNC_ID, syncid))
3190 goto nla_put_failure;
9a812198
JV		 3191 nla_nest_end(skb, nl_daemon);
3192
3193 return 0;
3194
3195nla_put_failure:
3196 nla_nest_cancel(skb, nl_daemon);
3197 return -EMSGSIZE;
3198}
3199
0a925864
JA		 3200static int ip_vs_genl_dump_daemon(struct sk_buff *skb, __u32 state,
3201 const char *mcast_ifn, __u32 syncid,
9a812198
JV		 3202 struct netlink_callback *cb)
3203{
3204 void *hdr;
15e47304 3205 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
9a812198
JV		 3206 &ip_vs_genl_family, NLM_F_MULTI,
3207 IPVS_CMD_NEW_DAEMON);
3208 if (!hdr)
3209 return -EMSGSIZE;
3210
3211 if (ip_vs_genl_fill_daemon(skb, state, mcast_ifn, syncid))
3212 goto nla_put_failure;
3213
3214 return genlmsg_end(skb, hdr);
3215
3216nla_put_failure:
3217 genlmsg_cancel(skb, hdr);
3218 return -EMSGSIZE;
3219}
3220
3221static int ip_vs_genl_dump_daemons(struct sk_buff *skb,
3222 struct netlink_callback *cb)
3223{
a09d1977 3224 struct net *net = skb_sknet(skb);
f131315f
HS		 3225 struct netns_ipvs *ipvs = net_ipvs(net);
3226
ae1d48b2 3227 mutex_lock(&ipvs->sync_mutex);
f131315f 3228 if ((ipvs->sync_state & IP_VS_STATE_MASTER) && !cb->args[0]) {
9a812198 3229 if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_MASTER,
f131315f
HS		 3230 ipvs->master_mcast_ifn,
3231 ipvs->master_syncid, cb) < 0)
9a812198
JV		 3232 goto nla_put_failure;
3233
3234 cb->args[0] = 1;
3235 }
3236
f131315f 3237 if ((ipvs->sync_state & IP_VS_STATE_BACKUP) && !cb->args[1]) {
9a812198 3238 if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_BACKUP,
f131315f
HS		 3239 ipvs->backup_mcast_ifn,
3240 ipvs->backup_syncid, cb) < 0)
9a812198
JV		 3241 goto nla_put_failure;
3242
3243 cb->args[1] = 1;
3244 }
3245
3246nla_put_failure:
ae1d48b2 3247 mutex_unlock(&ipvs->sync_mutex);
9a812198
JV		 3248
3249 return skb->len;
3250}
3251
f131315f 3252static int ip_vs_genl_new_daemon(struct net *net, struct nlattr **attrs)
9a812198
JV		 3253{
3254 if (!(attrs[IPVS_DAEMON_ATTR_STATE] &&
3255 attrs[IPVS_DAEMON_ATTR_MCAST_IFN] &&
3256 attrs[IPVS_DAEMON_ATTR_SYNC_ID]))
3257 return -EINVAL;
3258
f131315f
HS		 3259 return start_sync_thread(net,
3260 nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]),
9a812198
JV		 3261 nla_data(attrs[IPVS_DAEMON_ATTR_MCAST_IFN]),
3262 nla_get_u32(attrs[IPVS_DAEMON_ATTR_SYNC_ID]));
3263}
3264
f131315f 3265static int ip_vs_genl_del_daemon(struct net *net, struct nlattr **attrs)
9a812198
JV		 3266{
3267 if (!attrs[IPVS_DAEMON_ATTR_STATE])
3268 return -EINVAL;
3269
f131315f
HS		 3270 return stop_sync_thread(net,
3271 nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]));
9a812198
JV		 3272}
3273
9330419d 3274static int ip_vs_genl_set_config(struct net *net, struct nlattr **attrs)
9a812198
JV		 3275{
3276 struct ip_vs_timeout_user t;
3277
9330419d 3278 __ip_vs_get_timeouts(net, &t);
9a812198
JV		 3279
3280 if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP])
3281 t.tcp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP]);
3282
3283 if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN])
3284 t.tcp_fin_timeout =
3285 nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN]);
3286
3287 if (attrs[IPVS_CMD_ATTR_TIMEOUT_UDP])
3288 t.udp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_UDP]);
3289
9330419d 3290 return ip_vs_set_timeout(net, &t);
9a812198
JV		 3291}
3292
ae1d48b2 3293static int ip_vs_genl_set_daemon(struct sk_buff *skb, struct genl_info *info)
9a812198 3294{
9a812198 3295 int ret = 0, cmd;
fc723250 3296 struct net *net;
a0840e2e 3297 struct netns_ipvs *ipvs;
9a812198 3298
fc723250 3299 net = skb_sknet(skb);
a0840e2e 3300 ipvs = net_ipvs(net);
9a812198
JV		 3301 cmd = info->genlhdr->cmd;
3302
ae1d48b2 3303 if (cmd == IPVS_CMD_NEW_DAEMON || cmd == IPVS_CMD_DEL_DAEMON) {
9a812198
JV		 3304 struct nlattr *daemon_attrs[IPVS_DAEMON_ATTR_MAX + 1];
3305
ae1d48b2 3306 mutex_lock(&ipvs->sync_mutex);
9a812198
JV		 3307 if (!info->attrs[IPVS_CMD_ATTR_DAEMON] ||
3308 nla_parse_nested(daemon_attrs, IPVS_DAEMON_ATTR_MAX,
3309 info->attrs[IPVS_CMD_ATTR_DAEMON],
3310 ip_vs_daemon_policy)) {
3311 ret = -EINVAL;
3312 goto out;
3313 }
3314
3315 if (cmd == IPVS_CMD_NEW_DAEMON)
f131315f 3316 ret = ip_vs_genl_new_daemon(net, daemon_attrs);
9a812198 3317 else
f131315f 3318 ret = ip_vs_genl_del_daemon(net, daemon_attrs);
ae1d48b2
HS		 3319out:
3320 mutex_unlock(&ipvs->sync_mutex);
3321 }
3322 return ret;
3323}
3324
3325static int ip_vs_genl_set_cmd(struct sk_buff *skb, struct genl_info *info)
3326{
3327 struct ip_vs_service *svc = NULL;
3328 struct ip_vs_service_user_kern usvc;
3329 struct ip_vs_dest_user_kern udest;
3330 int ret = 0, cmd;
3331 int need_full_svc = 0, need_full_dest = 0;
3332 struct net *net;
ae1d48b2
HS		 3333
3334 net = skb_sknet(skb);
ae1d48b2
HS		 3335 cmd = info->genlhdr->cmd;
3336
3337 mutex_lock(&__ip_vs_mutex);
3338
3339 if (cmd == IPVS_CMD_FLUSH) {
578bc3ef 3340 ret = ip_vs_flush(net, false);
ae1d48b2
HS		 3341 goto out;
3342 } else if (cmd == IPVS_CMD_SET_CONFIG) {
3343 ret = ip_vs_genl_set_config(net, info->attrs);
9a812198
JV		 3344 goto out;
3345 } else if (cmd == IPVS_CMD_ZERO &&
3346 !info->attrs[IPVS_CMD_ATTR_SERVICE]) {
fc723250 3347 ret = ip_vs_zero_all(net);
9a812198
JV		 3348 goto out;
3349 }
3350
3351 /* All following commands require a service argument, so check if we
3352 * received a valid one. We need a full service specification when
3353 * adding / editing a service. Only identifying members otherwise. */
3354 if (cmd == IPVS_CMD_NEW_SERVICE || cmd == IPVS_CMD_SET_SERVICE)
3355 need_full_svc = 1;
3356
fc723250 3357 ret = ip_vs_genl_parse_service(net, &usvc,
9a812198 3358 info->attrs[IPVS_CMD_ATTR_SERVICE],
26c15cfd 3359 need_full_svc, &svc);
9a812198
JV		 3360 if (ret)
3361 goto out;
3362
9a812198
JV		 3363 /* Unless we're adding a new service, the service must already exist */
3364 if ((cmd != IPVS_CMD_NEW_SERVICE) && (svc == NULL)) {
3365 ret = -ESRCH;
3366 goto out;
3367 }
3368
3369 /* Destination commands require a valid destination argument. For
3370 * adding / editing a destination, we need a full destination
3371 * specification. */
3372 if (cmd == IPVS_CMD_NEW_DEST || cmd == IPVS_CMD_SET_DEST ||
3373 cmd == IPVS_CMD_DEL_DEST) {
3374 if (cmd != IPVS_CMD_DEL_DEST)
3375 need_full_dest = 1;
3376
3377 ret = ip_vs_genl_parse_dest(&udest,
3378 info->attrs[IPVS_CMD_ATTR_DEST],
3379 need_full_dest);
3380 if (ret)
3381 goto out;
6cff339b
AG		 3382
3383 /* Old protocols did not allow the user to specify address
3384 * family, so we set it to zero instead. We also didn't
3385 * allow heterogeneous pools in the old code, so it's safe
3386 * to assume that this will have the same address family as
3387 * the service.
3388 */
3389 if (udest.af == 0)
3390 udest.af = svc->af;
9a812198
JV		 3391 }
3392
3393 switch (cmd) {
3394 case IPVS_CMD_NEW_SERVICE:
3395 if (svc == NULL)
fc723250 3396 ret = ip_vs_add_service(net, &usvc, &svc);
9a812198
JV		 3397 else
3398 ret = -EEXIST;
3399 break;
3400 case IPVS_CMD_SET_SERVICE:
3401 ret = ip_vs_edit_service(svc, &usvc);
3402 break;
3403 case IPVS_CMD_DEL_SERVICE:
3404 ret = ip_vs_del_service(svc);
26c15cfd 3405 /* do not use svc, it can be freed */
9a812198
JV		 3406 break;
3407 case IPVS_CMD_NEW_DEST:
3408 ret = ip_vs_add_dest(svc, &udest);
3409 break;
3410 case IPVS_CMD_SET_DEST:
3411 ret = ip_vs_edit_dest(svc, &udest);
3412 break;
3413 case IPVS_CMD_DEL_DEST:
3414 ret = ip_vs_del_dest(svc, &udest);
3415 break;
3416 case IPVS_CMD_ZERO:
3417 ret = ip_vs_zero_service(svc);
3418 break;
3419 default:
3420 ret = -EINVAL;
3421 }
3422
3423out:
9a812198
JV		 3424 mutex_unlock(&__ip_vs_mutex);
3425
3426 return ret;
3427}
3428
3429static int ip_vs_genl_get_cmd(struct sk_buff *skb, struct genl_info *info)
3430{
3431 struct sk_buff *msg;
3432 void *reply;
3433 int ret, cmd, reply_cmd;
fc723250 3434 struct net *net;
9a812198 3435
fc723250 3436 net = skb_sknet(skb);
9a812198
JV		 3437 cmd = info->genlhdr->cmd;
3438
3439 if (cmd == IPVS_CMD_GET_SERVICE)
3440 reply_cmd = IPVS_CMD_NEW_SERVICE;
3441 else if (cmd == IPVS_CMD_GET_INFO)
3442 reply_cmd = IPVS_CMD_SET_INFO;
3443 else if (cmd == IPVS_CMD_GET_CONFIG)
3444 reply_cmd = IPVS_CMD_SET_CONFIG;
3445 else {
1e3e238e 3446 pr_err("unknown Generic Netlink command\n");
9a812198
JV		 3447 return -EINVAL;
3448 }
3449
3450 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3451 if (!msg)
3452 return -ENOMEM;
3453
3454 mutex_lock(&__ip_vs_mutex);
3455
3456 reply = genlmsg_put_reply(msg, info, &ip_vs_genl_family, 0, reply_cmd);
3457 if (reply == NULL)
3458 goto nla_put_failure;
3459
3460 switch (cmd) {
3461 case IPVS_CMD_GET_SERVICE:
3462 {
3463 struct ip_vs_service *svc;
3464
fc723250
HS		 3465 svc = ip_vs_genl_find_service(net,
3466 info->attrs[IPVS_CMD_ATTR_SERVICE]);
9a812198
JV		 3467 if (IS_ERR(svc)) {
3468 ret = PTR_ERR(svc);
3469 goto out_err;
3470 } else if (svc) {
3471 ret = ip_vs_genl_fill_service(msg, svc);
9a812198
JV		 3472 if (ret)
3473 goto nla_put_failure;
3474 } else {
3475 ret = -ESRCH;
3476 goto out_err;
3477 }
3478
3479 break;
3480 }
3481
3482 case IPVS_CMD_GET_CONFIG:
3483 {
3484 struct ip_vs_timeout_user t;
3485
9330419d 3486 __ip_vs_get_timeouts(net, &t);
9a812198 3487#ifdef CONFIG_IP_VS_PROTO_TCP
969e8e25
DM		 3488 if (nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP,
3489 t.tcp_timeout) ||
3490 nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP_FIN,
3491 t.tcp_fin_timeout))
3492 goto nla_put_failure;
9a812198
JV		 3493#endif
3494#ifdef CONFIG_IP_VS_PROTO_UDP
969e8e25
DM		 3495 if (nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_UDP, t.udp_timeout))
3496 goto nla_put_failure;
9a812198
JV		 3497#endif
3498
3499 break;
3500 }
3501
3502 case IPVS_CMD_GET_INFO:
969e8e25
DM		 3503 if (nla_put_u32(msg, IPVS_INFO_ATTR_VERSION,
3504 IP_VS_VERSION_CODE) ||
3505 nla_put_u32(msg, IPVS_INFO_ATTR_CONN_TAB_SIZE,
3506 ip_vs_conn_tab_size))
3507 goto nla_put_failure;
9a812198
JV		 3508 break;
3509 }
3510
3511 genlmsg_end(msg, reply);
134e6375 3512 ret = genlmsg_reply(msg, info);
9a812198
JV		 3513 goto out;
3514
3515nla_put_failure:
1e3e238e 3516 pr_err("not enough space in Netlink message\n");
9a812198
JV		 3517 ret = -EMSGSIZE;
3518
3519out_err:
3520 nlmsg_free(msg);
3521out:
3522 mutex_unlock(&__ip_vs_mutex);
3523
3524 return ret;
3525}
3526
3527
c61b0c13 3528static const struct genl_ops ip_vs_genl_ops[] = {
9a812198
JV		 3529 {
3530 .cmd = IPVS_CMD_NEW_SERVICE,
3531 .flags = GENL_ADMIN_PERM,
3532 .policy = ip_vs_cmd_policy,
3533 .doit = ip_vs_genl_set_cmd,
3534 },
3535 {
3536 .cmd = IPVS_CMD_SET_SERVICE,
3537 .flags = GENL_ADMIN_PERM,
3538 .policy = ip_vs_cmd_policy,
3539 .doit = ip_vs_genl_set_cmd,
3540 },
3541 {
3542 .cmd = IPVS_CMD_DEL_SERVICE,
3543 .flags = GENL_ADMIN_PERM,
3544 .policy = ip_vs_cmd_policy,
3545 .doit = ip_vs_genl_set_cmd,
3546 },
3547 {
3548 .cmd = IPVS_CMD_GET_SERVICE,
3549 .flags = GENL_ADMIN_PERM,
3550 .doit = ip_vs_genl_get_cmd,
3551 .dumpit = ip_vs_genl_dump_services,
3552 .policy = ip_vs_cmd_policy,
3553 },
3554 {
3555 .cmd = IPVS_CMD_NEW_DEST,
3556 .flags = GENL_ADMIN_PERM,
3557 .policy = ip_vs_cmd_policy,
3558 .doit = ip_vs_genl_set_cmd,
3559 },
3560 {
3561 .cmd = IPVS_CMD_SET_DEST,
3562 .flags = GENL_ADMIN_PERM,
3563 .policy = ip_vs_cmd_policy,
3564 .doit = ip_vs_genl_set_cmd,
3565 },
3566 {
3567 .cmd = IPVS_CMD_DEL_DEST,
3568 .flags = GENL_ADMIN_PERM,
3569 .policy = ip_vs_cmd_policy,
3570 .doit = ip_vs_genl_set_cmd,
3571 },
3572 {
3573 .cmd = IPVS_CMD_GET_DEST,
3574 .flags = GENL_ADMIN_PERM,
3575 .policy = ip_vs_cmd_policy,
3576 .dumpit = ip_vs_genl_dump_dests,
3577 },
3578 {
3579 .cmd = IPVS_CMD_NEW_DAEMON,
3580 .flags = GENL_ADMIN_PERM,
3581 .policy = ip_vs_cmd_policy,
ae1d48b2 3582 .doit = ip_vs_genl_set_daemon,
9a812198
JV		 3583 },
3584 {
3585 .cmd = IPVS_CMD_DEL_DAEMON,
3586 .flags = GENL_ADMIN_PERM,
3587 .policy = ip_vs_cmd_policy,
ae1d48b2 3588 .doit = ip_vs_genl_set_daemon,
9a812198
JV		 3589 },
3590 {
3591 .cmd = IPVS_CMD_GET_DAEMON,
3592 .flags = GENL_ADMIN_PERM,
3593 .dumpit = ip_vs_genl_dump_daemons,
3594 },
3595 {
3596 .cmd = IPVS_CMD_SET_CONFIG,
3597 .flags = GENL_ADMIN_PERM,
3598 .policy = ip_vs_cmd_policy,
3599 .doit = ip_vs_genl_set_cmd,
3600 },
3601 {
3602 .cmd = IPVS_CMD_GET_CONFIG,
3603 .flags = GENL_ADMIN_PERM,
3604 .doit = ip_vs_genl_get_cmd,
3605 },
3606 {
3607 .cmd = IPVS_CMD_GET_INFO,
3608 .flags = GENL_ADMIN_PERM,
3609 .doit = ip_vs_genl_get_cmd,
3610 },
3611 {
3612 .cmd = IPVS_CMD_ZERO,
3613 .flags = GENL_ADMIN_PERM,
3614 .policy = ip_vs_cmd_policy,
3615 .doit = ip_vs_genl_set_cmd,
3616 },
3617 {
3618 .cmd = IPVS_CMD_FLUSH,
3619 .flags = GENL_ADMIN_PERM,
3620 .doit = ip_vs_genl_set_cmd,
3621 },
3622};
3623
3624static int __init ip_vs_genl_register(void)
3625{
8f698d54 3626 return genl_register_family_with_ops(&ip_vs_genl_family,
c53ed742 3627 ip_vs_genl_ops);
9a812198
JV		 3628}
3629
3630static void ip_vs_genl_unregister(void)
3631{
3632 genl_unregister_family(&ip_vs_genl_family);
3633}
3634
3635/* End of Generic Netlink interface definitions */
3636
61b1ab45
HS		 3637/*
3638 * per netns intit/exit func.
3639 */
14e40546 3640#ifdef CONFIG_SYSCTL
2b2d2808 3641static int __net_init ip_vs_control_net_init_sysctl(struct net *net)
61b1ab45 3642{
fc723250
HS		 3643 int idx;
3644 struct netns_ipvs *ipvs = net_ipvs(net);
a0840e2e 3645 struct ctl_table *tbl;
fc723250 3646
a0840e2e
HS		 3647 atomic_set(&ipvs->dropentry, 0);
3648 spin_lock_init(&ipvs->dropentry_lock);
3649 spin_lock_init(&ipvs->droppacket_lock);
3650 spin_lock_init(&ipvs->securetcp_lock);
a0840e2e
HS		 3651
3652 if (!net_eq(net, &init_net)) {
3653 tbl = kmemdup(vs_vars, sizeof(vs_vars), GFP_KERNEL);
3654 if (tbl == NULL)
14e40546 3655 return -ENOMEM;
464dc801
EB		 3656
3657 /* Don't export sysctls to unprivileged users */
3658 if (net->user_ns != &init_user_ns)
3659 tbl[0].procname = NULL;
a0840e2e
HS		 3660 } else
3661 tbl = vs_vars;
3662 /* Initialize sysctl defaults */
3663 idx = 0;
3664 ipvs->sysctl_amemthresh = 1024;
3665 tbl[idx++].data = &ipvs->sysctl_amemthresh;
3666 ipvs->sysctl_am_droprate = 10;
3667 tbl[idx++].data = &ipvs->sysctl_am_droprate;
3668 tbl[idx++].data = &ipvs->sysctl_drop_entry;
3669 tbl[idx++].data = &ipvs->sysctl_drop_packet;
3670#ifdef CONFIG_IP_VS_NFCT
3671 tbl[idx++].data = &ipvs->sysctl_conntrack;
3672#endif
3673 tbl[idx++].data = &ipvs->sysctl_secure_tcp;
3674 ipvs->sysctl_snat_reroute = 1;
3675 tbl[idx++].data = &ipvs->sysctl_snat_reroute;
3676 ipvs->sysctl_sync_ver = 1;
3677 tbl[idx++].data = &ipvs->sysctl_sync_ver;
f73181c8
PNA		 3678 ipvs->sysctl_sync_ports = 1;
3679 tbl[idx++].data = &ipvs->sysctl_sync_ports;
4d0c875d 3680 tbl[idx++].data = &ipvs->sysctl_sync_persist_mode;
1c003b15
PNA		 3681 ipvs->sysctl_sync_qlen_max = nr_free_buffer_pages() / 32;
3682 tbl[idx++].data = &ipvs->sysctl_sync_qlen_max;
3683 ipvs->sysctl_sync_sock_size = 0;
3684 tbl[idx++].data = &ipvs->sysctl_sync_sock_size;
a0840e2e
HS		 3685 tbl[idx++].data = &ipvs->sysctl_cache_bypass;
3686 tbl[idx++].data = &ipvs->sysctl_expire_nodest_conn;
c6c96c18
AF		 3687 tbl[idx++].data = &ipvs->sysctl_sloppy_tcp;
3688 tbl[idx++].data = &ipvs->sysctl_sloppy_sctp;
a0840e2e 3689 tbl[idx++].data = &ipvs->sysctl_expire_quiescent_template;
59e0350e
SH		 3690 ipvs->sysctl_sync_threshold[0] = DEFAULT_SYNC_THRESHOLD;
3691 ipvs->sysctl_sync_threshold[1] = DEFAULT_SYNC_PERIOD;
a0840e2e
HS		 3692 tbl[idx].data = &ipvs->sysctl_sync_threshold;
3693 tbl[idx++].maxlen = sizeof(ipvs->sysctl_sync_threshold);
749c42b6
JA		 3694 ipvs->sysctl_sync_refresh_period = DEFAULT_SYNC_REFRESH_PERIOD;
3695 tbl[idx++].data = &ipvs->sysctl_sync_refresh_period;
3696 ipvs->sysctl_sync_retries = clamp_t(int, DEFAULT_SYNC_RETRIES, 0, 3);
3697 tbl[idx++].data = &ipvs->sysctl_sync_retries;
a0840e2e 3698 tbl[idx++].data = &ipvs->sysctl_nat_icmp_send;
3654e611
JA		 3699 ipvs->sysctl_pmtu_disc = 1;
3700 tbl[idx++].data = &ipvs->sysctl_pmtu_disc;
0c12582f 3701 tbl[idx++].data = &ipvs->sysctl_backup_only;
a0840e2e
HS		 3702
3703
ec8f23ce 3704 ipvs->sysctl_hdr = register_net_sysctl(net, "net/ipv4/vs", tbl);
0443929f
SH		 3705 if (ipvs->sysctl_hdr == NULL) {
3706 if (!net_eq(net, &init_net))
3707 kfree(tbl);
14e40546 3708 return -ENOMEM;
0443929f 3709 }
6ef757f9 3710 ip_vs_start_estimator(net, &ipvs->tot_stats);
a0840e2e 3711 ipvs->sysctl_tbl = tbl;
f6340ee0
HS		 3712 /* Schedule defense work */
3713 INIT_DELAYED_WORK(&ipvs->defense_work, defense_work_handler);
3714 schedule_delayed_work(&ipvs->defense_work, DEFENSE_TIMER_PERIOD);
61b1ab45 3715
61b1ab45 3716 return 0;
61b1ab45
HS		 3717}
3718
2b2d2808 3719static void __net_exit ip_vs_control_net_cleanup_sysctl(struct net *net)
61b1ab45 3720{
b17fc996
HS		 3721 struct netns_ipvs *ipvs = net_ipvs(net);
3722
f2431e6e
HS		 3723 cancel_delayed_work_sync(&ipvs->defense_work);
3724 cancel_work_sync(&ipvs->defense_work.work);
a0840e2e 3725 unregister_net_sysctl_table(ipvs->sysctl_hdr);
9802d21e 3726 ip_vs_stop_estimator(net, &ipvs->tot_stats);
14e40546
SH		 3727}
3728
3729#else
3730
2b2d2808
CG		 3731static int __net_init ip_vs_control_net_init_sysctl(struct net *net) { return 0; }
3732static void __net_exit ip_vs_control_net_cleanup_sysctl(struct net *net) { }
14e40546 3733
0443929f 3734#endif
14e40546 3735
7a4f0761
HS		 3736static struct notifier_block ip_vs_dst_notifier = {
3737 .notifier_call = ip_vs_dst_event,
3738};
3739
503cf15a 3740int __net_init ip_vs_control_net_init(struct net *net)
14e40546 3741{
827da44c 3742 int i, idx;
14e40546
SH		 3743 struct netns_ipvs *ipvs = net_ipvs(net);
3744
14e40546
SH		 3745 /* Initialize rs_table */
3746 for (idx = 0; idx < IP_VS_RTAB_SIZE; idx++)
276472ea 3747 INIT_HLIST_HEAD(&ipvs->rs_table[idx]);
14e40546
SH		 3748
3749 INIT_LIST_HEAD(&ipvs->dest_trash);
578bc3ef
JA		 3750 spin_lock_init(&ipvs->dest_trash_lock);
3751 setup_timer(&ipvs->dest_trash_timer, ip_vs_dest_trash_expire,
3752 (unsigned long) net);
14e40546
SH		 3753 atomic_set(&ipvs->ftpsvc_counter, 0);
3754 atomic_set(&ipvs->nullsvc_counter, 0);
3755
3756 /* procfs stats */
3757 ipvs->tot_stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
0a9ee813 3758 if (!ipvs->tot_stats.cpustats)
14e40546 3759 return -ENOMEM;
0a9ee813 3760
827da44c
JS		 3761 for_each_possible_cpu(i) {
3762 struct ip_vs_cpu_stats *ipvs_tot_stats;
3763 ipvs_tot_stats = per_cpu_ptr(ipvs->tot_stats.cpustats, i);
3764 u64_stats_init(&ipvs_tot_stats->syncp);
3765 }
3766
14e40546
SH		 3767 spin_lock_init(&ipvs->tot_stats.lock);
3768
d4beaa66
G		 3769 proc_create("ip_vs", 0, net->proc_net, &ip_vs_info_fops);
3770 proc_create("ip_vs_stats", 0, net->proc_net, &ip_vs_stats_fops);
3771 proc_create("ip_vs_stats_percpu", 0, net->proc_net,
3772 &ip_vs_stats_percpu_fops);
14e40546 3773
503cf15a 3774 if (ip_vs_control_net_init_sysctl(net))
14e40546
SH		 3775 goto err;
3776
3777 return 0;
3778
3779err:
2a0751af 3780 free_percpu(ipvs->tot_stats.cpustats);
61b1ab45
HS		 3781 return -ENOMEM;
3782}
3783
503cf15a 3784void __net_exit ip_vs_control_net_cleanup(struct net *net)
61b1ab45 3785{
b17fc996
HS		 3786 struct netns_ipvs *ipvs = net_ipvs(net);
3787
f2431e6e 3788 ip_vs_trash_cleanup(net);
503cf15a 3789 ip_vs_control_net_cleanup_sysctl(net);
ece31ffd
G		 3790 remove_proc_entry("ip_vs_stats_percpu", net->proc_net);
3791 remove_proc_entry("ip_vs_stats", net->proc_net);
3792 remove_proc_entry("ip_vs", net->proc_net);
2a0751af 3793 free_percpu(ipvs->tot_stats.cpustats);
61b1ab45
HS		 3794}
3795
8537de8a 3796int __init ip_vs_register_nl_ioctl(void)
1da177e4 3797{
fc723250 3798 int ret;
1da177e4 3799
1da177e4
LT		 3800 ret = nf_register_sockopt(&ip_vs_sockopts);
3801 if (ret) {
1e3e238e 3802 pr_err("cannot register sockopt.\n");
7a4f0761 3803 goto err_sock;
1da177e4
LT		 3804 }
3805
9a812198
JV		 3806 ret = ip_vs_genl_register();
3807 if (ret) {
1e3e238e 3808 pr_err("cannot register Generic Netlink interface.\n");
7a4f0761 3809 goto err_genl;
9a812198 3810 }
1da177e4 3811 return 0;
fc723250 3812
7a4f0761
HS		 3813err_genl:
3814 nf_unregister_sockopt(&ip_vs_sockopts);
3815err_sock:
fc723250 3816 return ret;
1da177e4
LT		 3817}
3818
8537de8a
HS		 3819void ip_vs_unregister_nl_ioctl(void)
3820{
3821 ip_vs_genl_unregister();
3822 nf_unregister_sockopt(&ip_vs_sockopts);
3823}
3824
3825int __init ip_vs_control_init(void)
3826{
3827 int idx;
3828 int ret;
3829
3830 EnterFunction(2);
3831
276472ea 3832 /* Initialize svc_table, ip_vs_svc_fwm_table */
8537de8a 3833 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38
JA		 3834 INIT_HLIST_HEAD(&ip_vs_svc_table[idx]);
3835 INIT_HLIST_HEAD(&ip_vs_svc_fwm_table[idx]);
8537de8a
HS		 3836 }
3837
3838 smp_wmb(); /* Do we really need it now ? */
3839
3840 ret = register_netdevice_notifier(&ip_vs_dst_notifier);
3841 if (ret < 0)
3842 return ret;
3843
3844 LeaveFunction(2);
3845 return 0;
3846}
3847
1da177e4
LT		 3848
3849void ip_vs_control_cleanup(void)
3850{
3851 EnterFunction(2);
7676e345 3852 unregister_netdevice_notifier(&ip_vs_dst_notifier);
1da177e4
LT		 3853 LeaveFunction(2);
3854}
Linux kernel - Deliverables
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