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Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf
[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{
982f4051 468 free_percpu(svc->stats.cpustats);
ceec4c38
JA		 469 kfree(svc);
470}
471
bcbde4c0 472static void ip_vs_service_rcu_free(struct rcu_head *head)
1da177e4 473{
bcbde4c0
JA		 474 struct ip_vs_service *svc;
475
476 svc = container_of(head, struct ip_vs_service, rcu_head);
477 ip_vs_service_free(svc);
478}
1da177e4 479
bcbde4c0
JA		 480static void __ip_vs_svc_put(struct ip_vs_service *svc, bool do_delay)
481{
26c15cfd 482 if (atomic_dec_and_test(&svc->refcnt)) {
ceec4c38 483 IP_VS_DBG_BUF(3, "Removing service %u/%s:%u\n",
26c15cfd
JA		 484 svc->fwmark,
485 IP_VS_DBG_ADDR(svc->af, &svc->addr),
ceec4c38 486 ntohs(svc->port));
bcbde4c0
JA		 487 if (do_delay)
488 call_rcu(&svc->rcu_head, ip_vs_service_rcu_free);
489 else
490 ip_vs_service_free(svc);
26c15cfd 491 }
1da177e4
LT		 492}
493
494
495/*
496 * Returns hash value for real service
497 */
95c96174 498static inline unsigned int ip_vs_rs_hashkey(int af,
7937df15
JV		 499 const union nf_inet_addr *addr,
500 __be16 port)
1da177e4 501{
95c96174 502 register unsigned int porth = ntohs(port);
7937df15
JV		 503 __be32 addr_fold = addr->ip;
504
505#ifdef CONFIG_IP_VS_IPV6
506 if (af == AF_INET6)
507 addr_fold = addr->ip6[0]^addr->ip6[1]^
508 addr->ip6[2]^addr->ip6[3];
509#endif
1da177e4 510
7937df15 511 return (ntohl(addr_fold)^(porth>>IP_VS_RTAB_BITS)^porth)
1da177e4
LT		 512 & IP_VS_RTAB_MASK;
513}
514
276472ea
JA		 515/* Hash ip_vs_dest in rs_table by <proto,addr,port>. */
516static void ip_vs_rs_hash(struct netns_ipvs *ipvs, struct ip_vs_dest *dest)
1da177e4 517{
95c96174 518 unsigned int hash;
1da177e4 519
276472ea
JA		 520 if (dest->in_rs_table)
521 return;
1da177e4
LT		 522
523 /*
524 * Hash by proto,addr,port,
525 * which are the parameters of the real service.
526 */
7937df15
JV		 527 hash = ip_vs_rs_hashkey(dest->af, &dest->addr, dest->port);
528
276472ea
JA		 529 hlist_add_head_rcu(&dest->d_list, &ipvs->rs_table[hash]);
530 dest->in_rs_table = 1;
1da177e4
LT		 531}
532
276472ea
JA		 533/* Unhash ip_vs_dest from rs_table. */
534static void ip_vs_rs_unhash(struct ip_vs_dest *dest)
1da177e4
LT		 535{
536 /*
fc723250 537 * Remove it from the rs_table table.
1da177e4 538 */
276472ea
JA		 539 if (dest->in_rs_table) {
540 hlist_del_rcu(&dest->d_list);
541 dest->in_rs_table = 0;
1da177e4 542 }
1da177e4
LT		 543}
544
276472ea
JA		 545/* Check if real service by <proto,addr,port> is present */
546bool ip_vs_has_real_service(struct net *net, int af, __u16 protocol,
547 const union nf_inet_addr *daddr, __be16 dport)
1da177e4 548{
fc723250 549 struct netns_ipvs *ipvs = net_ipvs(net);
95c96174 550 unsigned int hash;
1da177e4
LT		 551 struct ip_vs_dest *dest;
552
276472ea 553 /* Check for "full" addressed entries */
7937df15 554 hash = ip_vs_rs_hashkey(af, daddr, dport);
1da177e4 555
276472ea
JA		 556 rcu_read_lock();
557 hlist_for_each_entry_rcu(dest, &ipvs->rs_table[hash], d_list) {
558 if (dest->port == dport &&
559 dest->af == af &&
560 ip_vs_addr_equal(af, &dest->addr, daddr) &&
561 (dest->protocol == protocol || dest->vfwmark)) {
1da177e4 562 /* HIT */
276472ea
JA		 563 rcu_read_unlock();
564 return true;
1da177e4
LT		 565 }
566 }
276472ea 567 rcu_read_unlock();
1da177e4 568
276472ea 569 return false;
1da177e4
LT		 570}
571
413c2d04
JA		 572/* Lookup destination by {addr,port} in the given service
573 * Called under RCU lock.
1da177e4
LT		 574 */
575static struct ip_vs_dest *
655eef10
AG		 576ip_vs_lookup_dest(struct ip_vs_service *svc, int dest_af,
577 const union nf_inet_addr *daddr, __be16 dport)
1da177e4
LT		 578{
579 struct ip_vs_dest *dest;
580
581 /*
582 * Find the destination for the given service
583 */
413c2d04 584 list_for_each_entry_rcu(dest, &svc->destinations, n_list) {
655eef10
AG		 585 if ((dest->af == dest_af) &&
586 ip_vs_addr_equal(dest_af, &dest->addr, daddr) &&
587 (dest->port == dport)) {
1da177e4
LT		 588 /* HIT */
589 return dest;
590 }
591 }
592
593 return NULL;
594}
595
1e356f9c
RB		 596/*
597 * Find destination by {daddr,dport,vaddr,protocol}
413c2d04 598 * Created to be used in ip_vs_process_message() in
1e356f9c
RB		 599 * the backup synchronization daemon. It finds the
600 * destination to be bound to the received connection
601 * on the backup.
413c2d04 602 * Called under RCU lock, no refcnt is returned.
1e356f9c 603 */
655eef10 604struct ip_vs_dest *ip_vs_find_dest(struct net *net, int svc_af, int dest_af,
fc723250 605 const union nf_inet_addr *daddr,
7937df15
JV		 606 __be16 dport,
607 const union nf_inet_addr *vaddr,
52793dbe
JA		 608 __be16 vport, __u16 protocol, __u32 fwmark,
609 __u32 flags)
1e356f9c
RB		 610{
611 struct ip_vs_dest *dest;
612 struct ip_vs_service *svc;
52793dbe 613 __be16 port = dport;
1e356f9c 614
655eef10 615 svc = ip_vs_service_find(net, svc_af, fwmark, protocol, vaddr, vport);
1e356f9c
RB		 616 if (!svc)
617 return NULL;
52793dbe
JA		 618 if (fwmark && (flags & IP_VS_CONN_F_FWD_MASK) != IP_VS_CONN_F_MASQ)
619 port = 0;
655eef10 620 dest = ip_vs_lookup_dest(svc, dest_af, daddr, port);
52793dbe 621 if (!dest)
655eef10 622 dest = ip_vs_lookup_dest(svc, dest_af, daddr, port ^ dport);
1e356f9c
RB		 623 return dest;
624}
1da177e4 625
026ace06
JA		 626void ip_vs_dest_dst_rcu_free(struct rcu_head *head)
627{
628 struct ip_vs_dest_dst *dest_dst = container_of(head,
629 struct ip_vs_dest_dst,
630 rcu_head);
631
632 dst_release(dest_dst->dst_cache);
633 kfree(dest_dst);
634}
635
636/* Release dest_dst and dst_cache for dest in user context */
d1deae4d
JA		 637static void __ip_vs_dst_cache_reset(struct ip_vs_dest *dest)
638{
026ace06 639 struct ip_vs_dest_dst *old;
d1deae4d 640
026ace06
JA		 641 old = rcu_dereference_protected(dest->dest_dst, 1);
642 if (old) {
643 RCU_INIT_POINTER(dest->dest_dst, NULL);
644 call_rcu(&old->rcu_head, ip_vs_dest_dst_rcu_free);
645 }
d1deae4d
JA		 646}
647
1da177e4
LT		 648/*
649 * Lookup dest by {svc,addr,port} in the destination trash.
650 * The destination trash is used to hold the destinations that are removed
651 * from the service table but are still referenced by some conn entries.
652 * The reason to add the destination trash is when the dest is temporary
653 * down (either by administrator or by monitor program), the dest can be
654 * picked back from the trash, the remaining connections to the dest can
655 * continue, and the counting information of the dest is also useful for
656 * scheduling.
657 */
658static struct ip_vs_dest *
ad147aa4
AG		 659ip_vs_trash_get_dest(struct ip_vs_service *svc, int dest_af,
660 const union nf_inet_addr *daddr, __be16 dport)
1da177e4 661{
578bc3ef 662 struct ip_vs_dest *dest;
f2431e6e 663 struct netns_ipvs *ipvs = net_ipvs(svc->net);
1da177e4
LT		 664
665 /*
666 * Find the destination in trash
667 */
578bc3ef
JA		 668 spin_lock_bh(&ipvs->dest_trash_lock);
669 list_for_each_entry(dest, &ipvs->dest_trash, t_list) {
7937df15
JV		 670 IP_VS_DBG_BUF(3, "Destination %u/%s:%u still in trash, "
671 "dest->refcnt=%d\n",
672 dest->vfwmark,
ad147aa4 673 IP_VS_DBG_ADDR(dest->af, &dest->addr),
7937df15
JV		 674 ntohs(dest->port),
675 atomic_read(&dest->refcnt));
ad147aa4
AG		 676 if (dest->af == dest_af &&
677 ip_vs_addr_equal(dest_af, &dest->addr, daddr) &&
1da177e4
LT		 678 dest->port == dport &&
679 dest->vfwmark == svc->fwmark &&
680 dest->protocol == svc->protocol &&
681 (svc->fwmark ||
7937df15 682 (ip_vs_addr_equal(svc->af, &dest->vaddr, &svc->addr) &&
1da177e4
LT		 683 dest->vport == svc->port))) {
684 /* HIT */
578bc3ef
JA		 685 list_del(&dest->t_list);
686 ip_vs_dest_hold(dest);
687 goto out;
1da177e4
LT		 688 }
689 }
690
578bc3ef
JA		 691 dest = NULL;
692
693out:
694 spin_unlock_bh(&ipvs->dest_trash_lock);
695
696 return dest;
1da177e4
LT		 697}
698
578bc3ef
JA		 699static void ip_vs_dest_free(struct ip_vs_dest *dest)
700{
bcbde4c0
JA		 701 struct ip_vs_service *svc = rcu_dereference_protected(dest->svc, 1);
702
578bc3ef 703 __ip_vs_dst_cache_reset(dest);
bcbde4c0 704 __ip_vs_svc_put(svc, false);
578bc3ef 705 free_percpu(dest->stats.cpustats);
9e4e948a 706 ip_vs_dest_put_and_free(dest);
578bc3ef 707}
1da177e4
LT		 708
709/*
710 * Clean up all the destinations in the trash
711 * Called by the ip_vs_control_cleanup()
712 *
713 * When the ip_vs_control_clearup is activated by ipvs module exit,
714 * the service tables must have been flushed and all the connections
715 * are expired, and the refcnt of each destination in the trash must
578bc3ef 716 * be 0, so we simply release them here.
1da177e4 717 */
f2431e6e 718static void ip_vs_trash_cleanup(struct net *net)
1da177e4
LT		 719{
720 struct ip_vs_dest *dest, *nxt;
f2431e6e 721 struct netns_ipvs *ipvs = net_ipvs(net);
1da177e4 722
578bc3ef
JA		 723 del_timer_sync(&ipvs->dest_trash_timer);
724 /* No need to use dest_trash_lock */
725 list_for_each_entry_safe(dest, nxt, &ipvs->dest_trash, t_list) {
726 list_del(&dest->t_list);
727 ip_vs_dest_free(dest);
1da177e4
LT		 728 }
729}
730
55a3d4e1 731static void
cd67cd5e 732ip_vs_copy_stats(struct ip_vs_kstats *dst, struct ip_vs_stats *src)
55a3d4e1 733{
cd67cd5e 734#define IP_VS_SHOW_STATS_COUNTER(c) dst->c = src->kstats.c - src->kstats0.c
55a3d4e1
JA		 735
736 spin_lock_bh(&src->lock);
737
738 IP_VS_SHOW_STATS_COUNTER(conns);
739 IP_VS_SHOW_STATS_COUNTER(inpkts);
740 IP_VS_SHOW_STATS_COUNTER(outpkts);
741 IP_VS_SHOW_STATS_COUNTER(inbytes);
742 IP_VS_SHOW_STATS_COUNTER(outbytes);
743
ea9f22cc 744 ip_vs_read_estimator(dst, src);
55a3d4e1
JA		 745
746 spin_unlock_bh(&src->lock);
747}
1da177e4 748
cd67cd5e
JA		 749static void
750ip_vs_export_stats_user(struct ip_vs_stats_user *dst, struct ip_vs_kstats *src)
751{
752 dst->conns = (u32)src->conns;
753 dst->inpkts = (u32)src->inpkts;
754 dst->outpkts = (u32)src->outpkts;
755 dst->inbytes = src->inbytes;
756 dst->outbytes = src->outbytes;
757 dst->cps = (u32)src->cps;
758 dst->inpps = (u32)src->inpps;
759 dst->outpps = (u32)src->outpps;
760 dst->inbps = (u32)src->inbps;
761 dst->outbps = (u32)src->outbps;
762}
763
1da177e4
LT		 764static void
765ip_vs_zero_stats(struct ip_vs_stats *stats)
766{
767 spin_lock_bh(&stats->lock);
e93615d0 768
55a3d4e1
JA		 769 /* get current counters as zero point, rates are zeroed */
770
cd67cd5e 771#define IP_VS_ZERO_STATS_COUNTER(c) stats->kstats0.c = stats->kstats.c
55a3d4e1
JA		 772
773 IP_VS_ZERO_STATS_COUNTER(conns);
774 IP_VS_ZERO_STATS_COUNTER(inpkts);
775 IP_VS_ZERO_STATS_COUNTER(outpkts);
776 IP_VS_ZERO_STATS_COUNTER(inbytes);
777 IP_VS_ZERO_STATS_COUNTER(outbytes);
778
1da177e4 779 ip_vs_zero_estimator(stats);
e93615d0 780
3a14a313 781 spin_unlock_bh(&stats->lock);
1da177e4
LT		 782}
783
784/*
785 * Update a destination in the given service
786 */
787static void
26c15cfd
JA		 788__ip_vs_update_dest(struct ip_vs_service *svc, struct ip_vs_dest *dest,
789 struct ip_vs_dest_user_kern *udest, int add)
1da177e4 790{
fc723250 791 struct netns_ipvs *ipvs = net_ipvs(svc->net);
bcbde4c0 792 struct ip_vs_service *old_svc;
ceec4c38 793 struct ip_vs_scheduler *sched;
1da177e4
LT		 794 int conn_flags;
795
391f503d
AG		 796 /* We cannot modify an address and change the address family */
797 BUG_ON(!add && udest->af != dest->af);
798
799 if (add && udest->af != svc->af)
800 ipvs->mixed_address_family_dests++;
801
1da177e4
LT		 802 /* set the weight and the flags */
803 atomic_set(&dest->weight, udest->weight);
3575792e
JA		 804 conn_flags = udest->conn_flags & IP_VS_CONN_F_DEST_MASK;
805 conn_flags |= IP_VS_CONN_F_INACTIVE;
1da177e4 806
1da177e4 807 /* set the IP_VS_CONN_F_NOOUTPUT flag if not masquerading/NAT */
3575792e 808 if ((conn_flags & IP_VS_CONN_F_FWD_MASK) != IP_VS_CONN_F_MASQ) {
1da177e4
LT		 809 conn_flags |= IP_VS_CONN_F_NOOUTPUT;
810 } else {
811 /*
fc723250 812 * Put the real service in rs_table if not present.
1da177e4
LT		 813 * For now only for NAT!
814 */
fc723250 815 ip_vs_rs_hash(ipvs, dest);
1da177e4
LT		 816 }
817 atomic_set(&dest->conn_flags, conn_flags);
818
819 /* bind the service */
bcbde4c0
JA		 820 old_svc = rcu_dereference_protected(dest->svc, 1);
821 if (!old_svc) {
1da177e4
LT		 822 __ip_vs_bind_svc(dest, svc);
823 } else {
bcbde4c0 824 if (old_svc != svc) {
1da177e4
LT		 825 ip_vs_zero_stats(&dest->stats);
826 __ip_vs_bind_svc(dest, svc);
bcbde4c0 827 __ip_vs_svc_put(old_svc, true);
1da177e4
LT		 828 }
829 }
830
831 /* set the dest status flags */
832 dest->flags |= IP_VS_DEST_F_AVAILABLE;
833
834 if (udest->u_threshold == 0 || udest->u_threshold > dest->u_threshold)
835 dest->flags &= ~IP_VS_DEST_F_OVERLOAD;
836 dest->u_threshold = udest->u_threshold;
837 dest->l_threshold = udest->l_threshold;
26c15cfd 838
6cff339b
AG		 839 dest->af = udest->af;
840
ff75f40f 841 spin_lock_bh(&dest->dst_lock);
d1deae4d 842 __ip_vs_dst_cache_reset(dest);
ff75f40f 843 spin_unlock_bh(&dest->dst_lock);
fc604767 844
ceec4c38 845 sched = rcu_dereference_protected(svc->scheduler, 1);
26c15cfd 846 if (add) {
ceec4c38 847 ip_vs_start_estimator(svc->net, &dest->stats);
413c2d04 848 list_add_rcu(&dest->n_list, &svc->destinations);
26c15cfd 849 svc->num_dests++;
ceec4c38
JA		 850 if (sched->add_dest)
851 sched->add_dest(svc, dest);
6b6df466 852 } else {
ceec4c38
JA		 853 if (sched->upd_dest)
854 sched->upd_dest(svc, dest);
26c15cfd 855 }
1da177e4
LT		 856}
857
858
859/*
860 * Create a destination for the given service
861 */
862static int
c860c6b1 863ip_vs_new_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest,
1da177e4
LT		 864 struct ip_vs_dest **dest_p)
865{
866 struct ip_vs_dest *dest;
827da44c 867 unsigned int atype, i;
1da177e4
LT		 868
869 EnterFunction(2);
870
09571c7a 871#ifdef CONFIG_IP_VS_IPV6
6cff339b 872 if (udest->af == AF_INET6) {
09571c7a 873 atype = ipv6_addr_type(&udest->addr.in6);
3bfb92f4
SW		 874 if ((!(atype & IPV6_ADDR_UNICAST) ||
875 atype & IPV6_ADDR_LINKLOCAL) &&
4a98480b 876 !__ip_vs_addr_is_local_v6(svc->net, &udest->addr.in6))
09571c7a
VB		 877 return -EINVAL;
878 } else
879#endif
880 {
4a98480b 881 atype = inet_addr_type(svc->net, udest->addr.ip);
09571c7a
VB		 882 if (atype != RTN_LOCAL && atype != RTN_UNICAST)
883 return -EINVAL;
884 }
1da177e4 885
dee06e47 886 dest = kzalloc(sizeof(struct ip_vs_dest), GFP_KERNEL);
0a9ee813 887 if (dest == NULL)
1da177e4 888 return -ENOMEM;
0a9ee813 889
b17fc996 890 dest->stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
0a9ee813 891 if (!dest->stats.cpustats)
b17fc996 892 goto err_alloc;
1da177e4 893
827da44c
JS		 894 for_each_possible_cpu(i) {
895 struct ip_vs_cpu_stats *ip_vs_dest_stats;
896 ip_vs_dest_stats = per_cpu_ptr(dest->stats.cpustats, i);
897 u64_stats_init(&ip_vs_dest_stats->syncp);
898 }
899
6cff339b 900 dest->af = udest->af;
1da177e4 901 dest->protocol = svc->protocol;
c860c6b1 902 dest->vaddr = svc->addr;
1da177e4
LT		 903 dest->vport = svc->port;
904 dest->vfwmark = svc->fwmark;
6cff339b 905 ip_vs_addr_copy(udest->af, &dest->addr, &udest->addr);
1da177e4
LT		 906 dest->port = udest->port;
907
908 atomic_set(&dest->activeconns, 0);
909 atomic_set(&dest->inactconns, 0);
910 atomic_set(&dest->persistconns, 0);
26c15cfd 911 atomic_set(&dest->refcnt, 1);
1da177e4 912
276472ea 913 INIT_HLIST_NODE(&dest->d_list);
1da177e4
LT		 914 spin_lock_init(&dest->dst_lock);
915 spin_lock_init(&dest->stats.lock);
26c15cfd 916 __ip_vs_update_dest(svc, dest, udest, 1);
1da177e4
LT		 917
918 *dest_p = dest;
919
920 LeaveFunction(2);
921 return 0;
b17fc996
HS		 922
923err_alloc:
924 kfree(dest);
925 return -ENOMEM;
1da177e4
LT		 926}
927
928
929/*
930 * Add a destination into an existing service
931 */
932static int
c860c6b1 933ip_vs_add_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
1da177e4
LT		 934{
935 struct ip_vs_dest *dest;
c860c6b1 936 union nf_inet_addr daddr;
014d730d 937 __be16 dport = udest->port;
1da177e4
LT		 938 int ret;
939
940 EnterFunction(2);
941
942 if (udest->weight < 0) {
1e3e238e 943 pr_err("%s(): server weight less than zero\n", __func__);
1da177e4
LT		 944 return -ERANGE;
945 }
946
947 if (udest->l_threshold > udest->u_threshold) {
1e3e238e
HE		 948 pr_err("%s(): lower threshold is higher than upper threshold\n",
949 __func__);
1da177e4
LT		 950 return -ERANGE;
951 }
952
6cff339b 953 ip_vs_addr_copy(udest->af, &daddr, &udest->addr);
c860c6b1 954
413c2d04
JA		 955 /* We use function that requires RCU lock */
956 rcu_read_lock();
655eef10 957 dest = ip_vs_lookup_dest(svc, udest->af, &daddr, dport);
413c2d04 958 rcu_read_unlock();
7937df15 959
1da177e4 960 if (dest != NULL) {
1e3e238e 961 IP_VS_DBG(1, "%s(): dest already exists\n", __func__);
1da177e4
LT		 962 return -EEXIST;
963 }
964
965 /*
966 * Check if the dest already exists in the trash and
967 * is from the same service
968 */
ad147aa4 969 dest = ip_vs_trash_get_dest(svc, udest->af, &daddr, dport);
7937df15 970
1da177e4 971 if (dest != NULL) {
cfc78c5a
JV		 972 IP_VS_DBG_BUF(3, "Get destination %s:%u from trash, "
973 "dest->refcnt=%d, service %u/%s:%u\n",
6cff339b 974 IP_VS_DBG_ADDR(udest->af, &daddr), ntohs(dport),
cfc78c5a
JV		 975 atomic_read(&dest->refcnt),
976 dest->vfwmark,
977 IP_VS_DBG_ADDR(svc->af, &dest->vaddr),
978 ntohs(dest->vport));
979
26c15cfd
JA		 980 __ip_vs_update_dest(svc, dest, udest, 1);
981 ret = 0;
982 } else {
1da177e4 983 /*
26c15cfd 984 * Allocate and initialize the dest structure
1da177e4 985 */
26c15cfd 986 ret = ip_vs_new_dest(svc, udest, &dest);
1da177e4 987 }
1da177e4
LT		 988 LeaveFunction(2);
989
26c15cfd 990 return ret;
1da177e4
LT		 991}
992
993
994/*
995 * Edit a destination in the given service
996 */
997static int
c860c6b1 998ip_vs_edit_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
1da177e4
LT		 999{
1000 struct ip_vs_dest *dest;
c860c6b1 1001 union nf_inet_addr daddr;
014d730d 1002 __be16 dport = udest->port;
1da177e4
LT		 1003
1004 EnterFunction(2);
1005
1006 if (udest->weight < 0) {
1e3e238e 1007 pr_err("%s(): server weight less than zero\n", __func__);
1da177e4
LT		 1008 return -ERANGE;
1009 }
1010
1011 if (udest->l_threshold > udest->u_threshold) {
1e3e238e
HE		 1012 pr_err("%s(): lower threshold is higher than upper threshold\n",
1013 __func__);
1da177e4
LT		 1014 return -ERANGE;
1015 }
1016
6cff339b 1017 ip_vs_addr_copy(udest->af, &daddr, &udest->addr);
c860c6b1 1018
413c2d04
JA		 1019 /* We use function that requires RCU lock */
1020 rcu_read_lock();
655eef10 1021 dest = ip_vs_lookup_dest(svc, udest->af, &daddr, dport);
413c2d04 1022 rcu_read_unlock();
7937df15 1023
1da177e4 1024 if (dest == NULL) {
1e3e238e 1025 IP_VS_DBG(1, "%s(): dest doesn't exist\n", __func__);
1da177e4
LT		 1026 return -ENOENT;
1027 }
1028
26c15cfd 1029 __ip_vs_update_dest(svc, dest, udest, 0);
1da177e4
LT		 1030 LeaveFunction(2);
1031
1032 return 0;
1033}
1034
1da177e4
LT		 1035/*
1036 * Delete a destination (must be already unlinked from the service)
1037 */
578bc3ef
JA		 1038static void __ip_vs_del_dest(struct net *net, struct ip_vs_dest *dest,
1039 bool cleanup)
1da177e4 1040{
a0840e2e
HS		 1041 struct netns_ipvs *ipvs = net_ipvs(net);
1042
6ef757f9 1043 ip_vs_stop_estimator(net, &dest->stats);
1da177e4
LT		 1044
1045 /*
1046 * Remove it from the d-linked list with the real services.
1047 */
1da177e4 1048 ip_vs_rs_unhash(dest);
1da177e4 1049
578bc3ef
JA		 1050 spin_lock_bh(&ipvs->dest_trash_lock);
1051 IP_VS_DBG_BUF(3, "Moving dest %s:%u into trash, dest->refcnt=%d\n",
1052 IP_VS_DBG_ADDR(dest->af, &dest->addr), ntohs(dest->port),
1053 atomic_read(&dest->refcnt));
1054 if (list_empty(&ipvs->dest_trash) && !cleanup)
1055 mod_timer(&ipvs->dest_trash_timer,
bcbde4c0 1056 jiffies + (IP_VS_DEST_TRASH_PERIOD >> 1));
578bc3ef
JA		 1057 /* dest lives in trash without reference */
1058 list_add(&dest->t_list, &ipvs->dest_trash);
bcbde4c0 1059 dest->idle_start = 0;
578bc3ef
JA		 1060 spin_unlock_bh(&ipvs->dest_trash_lock);
1061 ip_vs_dest_put(dest);
1da177e4
LT		 1062}
1063
1064
1065/*
1066 * Unlink a destination from the given service
1067 */
1068static void __ip_vs_unlink_dest(struct ip_vs_service *svc,
1069 struct ip_vs_dest *dest,
1070 int svcupd)
1071{
1072 dest->flags &= ~IP_VS_DEST_F_AVAILABLE;
1073
1074 /*
1075 * Remove it from the d-linked destination list.
1076 */
413c2d04 1077 list_del_rcu(&dest->n_list);
1da177e4 1078 svc->num_dests--;
82dfb6f3 1079
391f503d
AG		 1080 if (dest->af != svc->af)
1081 net_ipvs(svc->net)->mixed_address_family_dests--;
1082
ceec4c38
JA		 1083 if (svcupd) {
1084 struct ip_vs_scheduler *sched;
6b6df466 1085
ceec4c38
JA		 1086 sched = rcu_dereference_protected(svc->scheduler, 1);
1087 if (sched->del_dest)
1088 sched->del_dest(svc, dest);
1089 }
1da177e4
LT		 1090}
1091
1092
1093/*
1094 * Delete a destination server in the given service
1095 */
1096static int
c860c6b1 1097ip_vs_del_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
1da177e4
LT		 1098{
1099 struct ip_vs_dest *dest;
014d730d 1100 __be16 dport = udest->port;
1da177e4
LT		 1101
1102 EnterFunction(2);
1103
413c2d04
JA		 1104 /* We use function that requires RCU lock */
1105 rcu_read_lock();
655eef10 1106 dest = ip_vs_lookup_dest(svc, udest->af, &udest->addr, dport);
413c2d04 1107 rcu_read_unlock();
c860c6b1 1108
1da177e4 1109 if (dest == NULL) {
1e3e238e 1110 IP_VS_DBG(1, "%s(): destination not found!\n", __func__);
1da177e4
LT		 1111 return -ENOENT;
1112 }
1113
1da177e4
LT		 1114 /*
1115 * Unlink dest from the service
1116 */
1117 __ip_vs_unlink_dest(svc, dest, 1);
1118
1da177e4
LT		 1119 /*
1120 * Delete the destination
1121 */
578bc3ef 1122 __ip_vs_del_dest(svc->net, dest, false);
1da177e4
LT		 1123
1124 LeaveFunction(2);
1125
1126 return 0;
1127}
1128
578bc3ef
JA		 1129static void ip_vs_dest_trash_expire(unsigned long data)
1130{
1131 struct net *net = (struct net *) data;
1132 struct netns_ipvs *ipvs = net_ipvs(net);
1133 struct ip_vs_dest *dest, *next;
bcbde4c0 1134 unsigned long now = jiffies;
578bc3ef
JA		 1135
1136 spin_lock(&ipvs->dest_trash_lock);
1137 list_for_each_entry_safe(dest, next, &ipvs->dest_trash, t_list) {
578bc3ef
JA		 1138 if (atomic_read(&dest->refcnt) > 0)
1139 continue;
bcbde4c0
JA		 1140 if (dest->idle_start) {
1141 if (time_before(now, dest->idle_start +
1142 IP_VS_DEST_TRASH_PERIOD))
1143 continue;
1144 } else {
1145 dest->idle_start = max(1UL, now);
1146 continue;
1147 }
578bc3ef
JA		 1148 IP_VS_DBG_BUF(3, "Removing destination %u/%s:%u from trash\n",
1149 dest->vfwmark,
bcbde4c0 1150 IP_VS_DBG_ADDR(dest->af, &dest->addr),
578bc3ef
JA		 1151 ntohs(dest->port));
1152 list_del(&dest->t_list);
1153 ip_vs_dest_free(dest);
1154 }
1155 if (!list_empty(&ipvs->dest_trash))
1156 mod_timer(&ipvs->dest_trash_timer,
bcbde4c0 1157 jiffies + (IP_VS_DEST_TRASH_PERIOD >> 1));
578bc3ef
JA		 1158 spin_unlock(&ipvs->dest_trash_lock);
1159}
1da177e4
LT		 1160
1161/*
1162 * Add a service into the service hash table
1163 */
1164static int
fc723250 1165ip_vs_add_service(struct net *net, struct ip_vs_service_user_kern *u,
c860c6b1 1166 struct ip_vs_service **svc_p)
1da177e4 1167{
827da44c 1168 int ret = 0, i;
1da177e4 1169 struct ip_vs_scheduler *sched = NULL;
0d1e71b0 1170 struct ip_vs_pe *pe = NULL;
1da177e4 1171 struct ip_vs_service *svc = NULL;
a0840e2e 1172 struct netns_ipvs *ipvs = net_ipvs(net);
1da177e4
LT		 1173
1174 /* increase the module use count */
1175 ip_vs_use_count_inc();
1176
1177 /* Lookup the scheduler by 'u->sched_name' */
1178 sched = ip_vs_scheduler_get(u->sched_name);
1179 if (sched == NULL) {
1e3e238e 1180 pr_info("Scheduler module ip_vs_%s not found\n", u->sched_name);
1da177e4 1181 ret = -ENOENT;
6e08bfb8 1182 goto out_err;
1da177e4
LT		 1183 }
1184
0d1e71b0 1185 if (u->pe_name && *u->pe_name) {
e9e5eee8 1186 pe = ip_vs_pe_getbyname(u->pe_name);
0d1e71b0
SH		 1187 if (pe == NULL) {
1188 pr_info("persistence engine module ip_vs_pe_%s "
1189 "not found\n", u->pe_name);
1190 ret = -ENOENT;
1191 goto out_err;
1192 }
1193 }
1194
f94fd041 1195#ifdef CONFIG_IP_VS_IPV6
0a925864
JA		 1196 if (u->af == AF_INET6) {
1197 __u32 plen = (__force __u32) u->netmask;
1198
1199 if (plen < 1 || plen > 128) {
1200 ret = -EINVAL;
1201 goto out_err;
1202 }
f94fd041
JV		 1203 }
1204#endif
1205
dee06e47 1206 svc = kzalloc(sizeof(struct ip_vs_service), GFP_KERNEL);
1da177e4 1207 if (svc == NULL) {
1e3e238e 1208 IP_VS_DBG(1, "%s(): no memory\n", __func__);
1da177e4
LT		 1209 ret = -ENOMEM;
1210 goto out_err;
1211 }
b17fc996 1212 svc->stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
0a54e939
JL		 1213 if (!svc->stats.cpustats) {
1214 ret = -ENOMEM;
b17fc996 1215 goto out_err;
0a54e939 1216 }
1da177e4 1217
827da44c
JS		 1218 for_each_possible_cpu(i) {
1219 struct ip_vs_cpu_stats *ip_vs_stats;
1220 ip_vs_stats = per_cpu_ptr(svc->stats.cpustats, i);
1221 u64_stats_init(&ip_vs_stats->syncp);
1222 }
1223
1224
1da177e4 1225 /* I'm the first user of the service */
1da177e4
LT		 1226 atomic_set(&svc->refcnt, 0);
1227
c860c6b1 1228 svc->af = u->af;
1da177e4 1229 svc->protocol = u->protocol;
c860c6b1 1230 ip_vs_addr_copy(svc->af, &svc->addr, &u->addr);
1da177e4
LT		 1231 svc->port = u->port;
1232 svc->fwmark = u->fwmark;
1233 svc->flags = u->flags;
1234 svc->timeout = u->timeout * HZ;
1235 svc->netmask = u->netmask;
fc723250 1236 svc->net = net;
1da177e4
LT		 1237
1238 INIT_LIST_HEAD(&svc->destinations);
ba3a3ce1 1239 spin_lock_init(&svc->sched_lock);
1da177e4
LT		 1240 spin_lock_init(&svc->stats.lock);
1241
1242 /* Bind the scheduler */
1243 ret = ip_vs_bind_scheduler(svc, sched);
1244 if (ret)
1245 goto out_err;
1246 sched = NULL;
1247
0d1e71b0 1248 /* Bind the ct retriever */
ceec4c38 1249 RCU_INIT_POINTER(svc->pe, pe);
0d1e71b0
SH		 1250 pe = NULL;
1251
1da177e4
LT		 1252 /* Update the virtual service counters */
1253 if (svc->port == FTPPORT)
763f8d0e 1254 atomic_inc(&ipvs->ftpsvc_counter);
1da177e4 1255 else if (svc->port == 0)
763f8d0e 1256 atomic_inc(&ipvs->nullsvc_counter);
1da177e4 1257
6ef757f9 1258 ip_vs_start_estimator(net, &svc->stats);
f94fd041
JV		 1259
1260 /* Count only IPv4 services for old get/setsockopt interface */
1261 if (svc->af == AF_INET)
a0840e2e 1262 ipvs->num_services++;
1da177e4
LT		 1263
1264 /* Hash the service into the service table */
1da177e4 1265 ip_vs_svc_hash(svc);
1da177e4
LT		 1266
1267 *svc_p = svc;
7a4f0761
HS		 1268 /* Now there is a service - full throttle */
1269 ipvs->enable = 1;
1da177e4
LT		 1270 return 0;
1271
b17fc996 1272
6e08bfb8 1273 out_err:
1da177e4 1274 if (svc != NULL) {
ceec4c38
JA		 1275 ip_vs_unbind_scheduler(svc, sched);
1276 ip_vs_service_free(svc);
1da177e4
LT		 1277 }
1278 ip_vs_scheduler_put(sched);
0d1e71b0 1279 ip_vs_pe_put(pe);
1da177e4 1280
1da177e4
LT		 1281 /* decrease the module use count */
1282 ip_vs_use_count_dec();
1283
1284 return ret;
1285}
1286
1287
1288/*
1289 * Edit a service and bind it with a new scheduler
1290 */
1291static int
c860c6b1 1292ip_vs_edit_service(struct ip_vs_service *svc, struct ip_vs_service_user_kern *u)
1da177e4
LT		 1293{
1294 struct ip_vs_scheduler *sched, *old_sched;
0d1e71b0 1295 struct ip_vs_pe *pe = NULL, *old_pe = NULL;
1da177e4
LT		 1296 int ret = 0;
1297
1298 /*
1299 * Lookup the scheduler, by 'u->sched_name'
1300 */
1301 sched = ip_vs_scheduler_get(u->sched_name);
1302 if (sched == NULL) {
1e3e238e 1303 pr_info("Scheduler module ip_vs_%s not found\n", u->sched_name);
1da177e4
LT		 1304 return -ENOENT;
1305 }
1306 old_sched = sched;
1307
0d1e71b0 1308 if (u->pe_name && *u->pe_name) {
e9e5eee8 1309 pe = ip_vs_pe_getbyname(u->pe_name);
0d1e71b0
SH		 1310 if (pe == NULL) {
1311 pr_info("persistence engine module ip_vs_pe_%s "
1312 "not found\n", u->pe_name);
1313 ret = -ENOENT;
1314 goto out;
1315 }
1316 old_pe = pe;
1317 }
1318
f94fd041 1319#ifdef CONFIG_IP_VS_IPV6
0a925864
JA		 1320 if (u->af == AF_INET6) {
1321 __u32 plen = (__force __u32) u->netmask;
1322
1323 if (plen < 1 || plen > 128) {
1324 ret = -EINVAL;
1325 goto out;
1326 }
f94fd041
JV		 1327 }
1328#endif
1329
ceec4c38
JA		 1330 old_sched = rcu_dereference_protected(svc->scheduler, 1);
1331 if (sched != old_sched) {
1332 /* Bind the new scheduler */
1333 ret = ip_vs_bind_scheduler(svc, sched);
1334 if (ret) {
1335 old_sched = sched;
1336 goto out;
1337 }
1338 /* Unbind the old scheduler on success */
1339 ip_vs_unbind_scheduler(svc, old_sched);
1340 }
1da177e4
LT		 1341
1342 /*
1343 * Set the flags and timeout value
1344 */
1345 svc->flags = u->flags | IP_VS_SVC_F_HASHED;
1346 svc->timeout = u->timeout * HZ;
1347 svc->netmask = u->netmask;
1348
ceec4c38
JA		 1349 old_pe = rcu_dereference_protected(svc->pe, 1);
1350 if (pe != old_pe)
1351 rcu_assign_pointer(svc->pe, pe);
1da177e4 1352
552ad65a 1353out:
6e08bfb8 1354 ip_vs_scheduler_put(old_sched);
0d1e71b0 1355 ip_vs_pe_put(old_pe);
1da177e4
LT		 1356 return ret;
1357}
1358
1da177e4
LT		 1359/*
1360 * Delete a service from the service list
1361 * - The service must be unlinked, unlocked and not referenced!
1362 * - We are called under _bh lock
1363 */
578bc3ef 1364static void __ip_vs_del_service(struct ip_vs_service *svc, bool cleanup)
1da177e4
LT		 1365{
1366 struct ip_vs_dest *dest, *nxt;
1367 struct ip_vs_scheduler *old_sched;
0d1e71b0 1368 struct ip_vs_pe *old_pe;
a0840e2e 1369 struct netns_ipvs *ipvs = net_ipvs(svc->net);
0d1e71b0
SH		 1370
1371 pr_info("%s: enter\n", __func__);
1da177e4 1372
f94fd041
JV		 1373 /* Count only IPv4 services for old get/setsockopt interface */
1374 if (svc->af == AF_INET)
a0840e2e 1375 ipvs->num_services--;
f94fd041 1376
6ef757f9 1377 ip_vs_stop_estimator(svc->net, &svc->stats);
1da177e4
LT		 1378
1379 /* Unbind scheduler */
ceec4c38
JA		 1380 old_sched = rcu_dereference_protected(svc->scheduler, 1);
1381 ip_vs_unbind_scheduler(svc, old_sched);
6e08bfb8 1382 ip_vs_scheduler_put(old_sched);
1da177e4 1383
ceec4c38
JA		 1384 /* Unbind persistence engine, keep svc->pe */
1385 old_pe = rcu_dereference_protected(svc->pe, 1);
0d1e71b0
SH		 1386 ip_vs_pe_put(old_pe);
1387
1da177e4
LT		 1388 /*
1389 * Unlink the whole destination list
1390 */
1391 list_for_each_entry_safe(dest, nxt, &svc->destinations, n_list) {
1392 __ip_vs_unlink_dest(svc, dest, 0);
578bc3ef 1393 __ip_vs_del_dest(svc->net, dest, cleanup);
1da177e4
LT		 1394 }
1395
1396 /*
1397 * Update the virtual service counters
1398 */
1399 if (svc->port == FTPPORT)
763f8d0e 1400 atomic_dec(&ipvs->ftpsvc_counter);
1da177e4 1401 else if (svc->port == 0)
763f8d0e 1402 atomic_dec(&ipvs->nullsvc_counter);
1da177e4
LT		 1403
1404 /*
1405 * Free the service if nobody refers to it
1406 */
bcbde4c0 1407 __ip_vs_svc_put(svc, true);
1da177e4
LT		 1408
1409 /* decrease the module use count */
1410 ip_vs_use_count_dec();
1411}
1412
1413/*
26c15cfd 1414 * Unlink a service from list and try to delete it if its refcnt reached 0
1da177e4 1415 */
578bc3ef 1416static void ip_vs_unlink_service(struct ip_vs_service *svc, bool cleanup)
1da177e4 1417{
ceec4c38
JA		 1418 /* Hold svc to avoid double release from dest_trash */
1419 atomic_inc(&svc->refcnt);
1da177e4
LT		 1420 /*
1421 * Unhash it from the service table
1422 */
1da177e4
LT		 1423 ip_vs_svc_unhash(svc);
1424
578bc3ef 1425 __ip_vs_del_service(svc, cleanup);
26c15cfd
JA		 1426}
1427
1428/*
1429 * Delete a service from the service list
1430 */
1431static int ip_vs_del_service(struct ip_vs_service *svc)
1432{
1433 if (svc == NULL)
1434 return -EEXIST;
578bc3ef 1435 ip_vs_unlink_service(svc, false);
1da177e4
LT		 1436
1437 return 0;
1438}
1439
1440
1441/*
1442 * Flush all the virtual services
1443 */
578bc3ef 1444static int ip_vs_flush(struct net *net, bool cleanup)
1da177e4
LT		 1445{
1446 int idx;
ceec4c38
JA		 1447 struct ip_vs_service *svc;
1448 struct hlist_node *n;
1da177e4
LT		 1449
1450 /*
fc723250 1451 * Flush the service table hashed by <netns,protocol,addr,port>
1da177e4
LT		 1452 */
1453 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38
JA		 1454 hlist_for_each_entry_safe(svc, n, &ip_vs_svc_table[idx],
1455 s_list) {
fc723250 1456 if (net_eq(svc->net, net))
578bc3ef 1457 ip_vs_unlink_service(svc, cleanup);
1da177e4
LT		 1458 }
1459 }
1460
1461 /*
1462 * Flush the service table hashed by fwmark
1463 */
1464 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38
JA		 1465 hlist_for_each_entry_safe(svc, n, &ip_vs_svc_fwm_table[idx],
1466 f_list) {
fc723250 1467 if (net_eq(svc->net, net))
578bc3ef 1468 ip_vs_unlink_service(svc, cleanup);
1da177e4
LT		 1469 }
1470 }
1471
1472 return 0;
1473}
1474
7a4f0761
HS		 1475/*
1476 * Delete service by {netns} in the service table.
1477 * Called by __ip_vs_cleanup()
1478 */
503cf15a 1479void ip_vs_service_net_cleanup(struct net *net)
7a4f0761
HS		 1480{
1481 EnterFunction(2);
1482 /* Check for "full" addressed entries */
1483 mutex_lock(&__ip_vs_mutex);
578bc3ef 1484 ip_vs_flush(net, true);
7a4f0761
HS		 1485 mutex_unlock(&__ip_vs_mutex);
1486 LeaveFunction(2);
1487}
d1deae4d
JA		 1488
1489/* Put all references for device (dst_cache) */
7a4f0761 1490static inline void
d1deae4d 1491ip_vs_forget_dev(struct ip_vs_dest *dest, struct net_device *dev)
7a4f0761 1492{
d717bb2a
JA		 1493 struct ip_vs_dest_dst *dest_dst;
1494
7a4f0761 1495 spin_lock_bh(&dest->dst_lock);
d717bb2a
JA		 1496 dest_dst = rcu_dereference_protected(dest->dest_dst, 1);
1497 if (dest_dst && dest_dst->dst_cache->dev == dev) {
7a4f0761
HS		 1498 IP_VS_DBG_BUF(3, "Reset dev:%s dest %s:%u ,dest->refcnt=%d\n",
1499 dev->name,
1500 IP_VS_DBG_ADDR(dest->af, &dest->addr),
1501 ntohs(dest->port),
1502 atomic_read(&dest->refcnt));
d1deae4d 1503 __ip_vs_dst_cache_reset(dest);
7a4f0761
HS		 1504 }
1505 spin_unlock_bh(&dest->dst_lock);
1506
1507}
313eae63
JA		 1508/* Netdev event receiver
1509 * Currently only NETDEV_DOWN is handled to release refs to cached dsts
7a4f0761
HS		 1510 */
1511static int ip_vs_dst_event(struct notifier_block *this, unsigned long event,
351638e7 1512 void *ptr)
7a4f0761 1513{
351638e7 1514 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
7a4f0761 1515 struct net *net = dev_net(dev);
283283c4 1516 struct netns_ipvs *ipvs = net_ipvs(net);
7a4f0761
HS		 1517 struct ip_vs_service *svc;
1518 struct ip_vs_dest *dest;
1519 unsigned int idx;
1520
313eae63 1521 if (event != NETDEV_DOWN || !ipvs)
7a4f0761
HS		 1522 return NOTIFY_DONE;
1523 IP_VS_DBG(3, "%s() dev=%s\n", __func__, dev->name);
1524 EnterFunction(2);
1525 mutex_lock(&__ip_vs_mutex);
1526 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38 1527 hlist_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
7a4f0761
HS		 1528 if (net_eq(svc->net, net)) {
1529 list_for_each_entry(dest, &svc->destinations,
1530 n_list) {
d1deae4d 1531 ip_vs_forget_dev(dest, dev);
7a4f0761
HS		 1532 }
1533 }
1534 }
1535
ceec4c38 1536 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
7a4f0761
HS		 1537 if (net_eq(svc->net, net)) {
1538 list_for_each_entry(dest, &svc->destinations,
1539 n_list) {
d1deae4d 1540 ip_vs_forget_dev(dest, dev);
7a4f0761
HS		 1541 }
1542 }
1543
1544 }
1545 }
1546
578bc3ef
JA		 1547 spin_lock_bh(&ipvs->dest_trash_lock);
1548 list_for_each_entry(dest, &ipvs->dest_trash, t_list) {
d1deae4d 1549 ip_vs_forget_dev(dest, dev);
7a4f0761 1550 }
578bc3ef 1551 spin_unlock_bh(&ipvs->dest_trash_lock);
7a4f0761
HS		 1552 mutex_unlock(&__ip_vs_mutex);
1553 LeaveFunction(2);
1554 return NOTIFY_DONE;
1555}
1da177e4
LT		 1556
1557/*
1558 * Zero counters in a service or all services
1559 */
1560static int ip_vs_zero_service(struct ip_vs_service *svc)
1561{
1562 struct ip_vs_dest *dest;
1563
1da177e4
LT		 1564 list_for_each_entry(dest, &svc->destinations, n_list) {
1565 ip_vs_zero_stats(&dest->stats);
1566 }
1567 ip_vs_zero_stats(&svc->stats);
1da177e4
LT		 1568 return 0;
1569}
1570
fc723250 1571static int ip_vs_zero_all(struct net *net)
1da177e4
LT		 1572{
1573 int idx;
1574 struct ip_vs_service *svc;
1575
1576 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38 1577 hlist_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
fc723250
HS		 1578 if (net_eq(svc->net, net))
1579 ip_vs_zero_service(svc);
1da177e4
LT		 1580 }
1581 }
1582
1583 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38 1584 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
fc723250
HS		 1585 if (net_eq(svc->net, net))
1586 ip_vs_zero_service(svc);
1da177e4
LT		 1587 }
1588 }
1589
2a0751af 1590 ip_vs_zero_stats(&net_ipvs(net)->tot_stats);
1da177e4
LT		 1591 return 0;
1592}
1593
14e40546 1594#ifdef CONFIG_SYSCTL
749c42b6
JA		 1595
1596static int zero;
1597static int three = 3;
1598
1da177e4 1599static int
fe2c6338 1600proc_do_defense_mode(struct ctl_table *table, int write,
1da177e4
LT		 1601 void __user *buffer, size_t *lenp, loff_t *ppos)
1602{
9330419d 1603 struct net *net = current->nsproxy->net_ns;
1da177e4
LT		 1604 int *valp = table->data;
1605 int val = *valp;
1606 int rc;
1607
8d65af78 1608 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1da177e4
LT		 1609 if (write && (*valp != val)) {
1610 if ((*valp < 0) || (*valp > 3)) {
1611 /* Restore the correct value */
1612 *valp = val;
1613 } else {
9330419d 1614 update_defense_level(net_ipvs(net));
1da177e4
LT		 1615 }
1616 }
1617 return rc;
1618}
1619
1da177e4 1620static int
fe2c6338 1621proc_do_sync_threshold(struct ctl_table *table, int write,
1da177e4
LT		 1622 void __user *buffer, size_t *lenp, loff_t *ppos)
1623{
1624 int *valp = table->data;
1625 int val[2];
1626 int rc;
1627
1628 /* backup the value first */
1629 memcpy(val, valp, sizeof(val));
1630
8d65af78 1631 rc = proc_dointvec(table, write, buffer, lenp, ppos);
749c42b6
JA		 1632 if (write && (valp[0] < 0 || valp[1] < 0 ||
1633 (valp[0] >= valp[1] && valp[1]))) {
1da177e4
LT		 1634 /* Restore the correct value */
1635 memcpy(valp, val, sizeof(val));
1636 }
1637 return rc;
1638}
1639
b880c1f0 1640static int
fe2c6338 1641proc_do_sync_mode(struct ctl_table *table, int write,
b880c1f0
HS		 1642 void __user *buffer, size_t *lenp, loff_t *ppos)
1643{
1644 int *valp = table->data;
1645 int val = *valp;
1646 int rc;
1647
1648 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1649 if (write && (*valp != val)) {
1650 if ((*valp < 0) || (*valp > 1)) {
1651 /* Restore the correct value */
1652 *valp = val;
f73181c8
PNA		 1653 }
1654 }
1655 return rc;
1656}
1657
1658static int
fe2c6338 1659proc_do_sync_ports(struct ctl_table *table, int write,
f73181c8
PNA		 1660 void __user *buffer, size_t *lenp, loff_t *ppos)
1661{
1662 int *valp = table->data;
1663 int val = *valp;
1664 int rc;
1665
1666 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1667 if (write && (*valp != val)) {
1668 if (*valp < 1 || !is_power_of_2(*valp)) {
1669 /* Restore the correct value */
1670 *valp = val;
b880c1f0
HS		 1671 }
1672 }
1673 return rc;
1674}
1da177e4
LT		 1675
1676/*
1677 * IPVS sysctl table (under the /proc/sys/net/ipv4/vs/)
a0840e2e 1678 * Do not change order or insert new entries without
503cf15a 1679 * align with netns init in ip_vs_control_net_init()
1da177e4
LT		 1680 */
1681
1682static struct ctl_table vs_vars[] = {
1683 {
1da177e4 1684 .procname = "amemthresh",
1da177e4
LT		 1685 .maxlen = sizeof(int),
1686 .mode = 0644,
6d9f239a 1687 .proc_handler = proc_dointvec,
1da177e4 1688 },
1da177e4 1689 {
1da177e4 1690 .procname = "am_droprate",
1da177e4
LT		 1691 .maxlen = sizeof(int),
1692 .mode = 0644,
6d9f239a 1693 .proc_handler = proc_dointvec,
1da177e4
LT		 1694 },
1695 {
1da177e4 1696 .procname = "drop_entry",
1da177e4
LT		 1697 .maxlen = sizeof(int),
1698 .mode = 0644,
6d9f239a 1699 .proc_handler = proc_do_defense_mode,
1da177e4
LT		 1700 },
1701 {
1da177e4 1702 .procname = "drop_packet",
1da177e4
LT		 1703 .maxlen = sizeof(int),
1704 .mode = 0644,
6d9f239a 1705 .proc_handler = proc_do_defense_mode,
1da177e4 1706 },
f4bc17cd
JA		 1707#ifdef CONFIG_IP_VS_NFCT
1708 {
1709 .procname = "conntrack",
f4bc17cd
JA		 1710 .maxlen = sizeof(int),
1711 .mode = 0644,
1712 .proc_handler = &proc_dointvec,
1713 },
1714#endif
1da177e4 1715 {
1da177e4 1716 .procname = "secure_tcp",
1da177e4
LT		 1717 .maxlen = sizeof(int),
1718 .mode = 0644,
6d9f239a 1719 .proc_handler = proc_do_defense_mode,
1da177e4 1720 },
8a803040
JA		 1721 {
1722 .procname = "snat_reroute",
8a803040
JA		 1723 .maxlen = sizeof(int),
1724 .mode = 0644,
1725 .proc_handler = &proc_dointvec,
1726 },
b880c1f0
HS		 1727 {
1728 .procname = "sync_version",
b880c1f0
HS		 1729 .maxlen = sizeof(int),
1730 .mode = 0644,
1731 .proc_handler = &proc_do_sync_mode,
1732 },
f73181c8
PNA		 1733 {
1734 .procname = "sync_ports",
1735 .maxlen = sizeof(int),
1736 .mode = 0644,
1737 .proc_handler = &proc_do_sync_ports,
1738 },
4d0c875d
JA		 1739 {
1740 .procname = "sync_persist_mode",
1741 .maxlen = sizeof(int),
1742 .mode = 0644,
1743 .proc_handler = proc_dointvec,
1744 },
1c003b15
PNA		 1745 {
1746 .procname = "sync_qlen_max",
07995674 1747 .maxlen = sizeof(unsigned long),
1c003b15 1748 .mode = 0644,
07995674 1749 .proc_handler = proc_doulongvec_minmax,
1c003b15
PNA		 1750 },
1751 {
1752 .procname = "sync_sock_size",
1753 .maxlen = sizeof(int),
1754 .mode = 0644,
1755 .proc_handler = proc_dointvec,
1756 },
a0840e2e
HS		 1757 {
1758 .procname = "cache_bypass",
1759 .maxlen = sizeof(int),
1760 .mode = 0644,
1761 .proc_handler = proc_dointvec,
1762 },
1763 {
1764 .procname = "expire_nodest_conn",
1765 .maxlen = sizeof(int),
1766 .mode = 0644,
1767 .proc_handler = proc_dointvec,
1768 },
c6c96c18
AF		 1769 {
1770 .procname = "sloppy_tcp",
1771 .maxlen = sizeof(int),
1772 .mode = 0644,
1773 .proc_handler = proc_dointvec,
1774 },
1775 {
1776 .procname = "sloppy_sctp",
1777 .maxlen = sizeof(int),
1778 .mode = 0644,
1779 .proc_handler = proc_dointvec,
1780 },
a0840e2e
HS		 1781 {
1782 .procname = "expire_quiescent_template",
1783 .maxlen = sizeof(int),
1784 .mode = 0644,
1785 .proc_handler = proc_dointvec,
1786 },
1787 {
1788 .procname = "sync_threshold",
1789 .maxlen =
1790 sizeof(((struct netns_ipvs *)0)->sysctl_sync_threshold),
1791 .mode = 0644,
1792 .proc_handler = proc_do_sync_threshold,
1793 },
749c42b6
JA		 1794 {
1795 .procname = "sync_refresh_period",
1796 .maxlen = sizeof(int),
1797 .mode = 0644,
1798 .proc_handler = proc_dointvec_jiffies,
1799 },
1800 {
1801 .procname = "sync_retries",
1802 .maxlen = sizeof(int),
1803 .mode = 0644,
1804 .proc_handler = proc_dointvec_minmax,
1805 .extra1 = &zero,
1806 .extra2 = &three,
1807 },
a0840e2e
HS		 1808 {
1809 .procname = "nat_icmp_send",
1810 .maxlen = sizeof(int),
1811 .mode = 0644,
1812 .proc_handler = proc_dointvec,
1813 },
3654e611
JA		 1814 {
1815 .procname = "pmtu_disc",
1816 .maxlen = sizeof(int),
1817 .mode = 0644,
1818 .proc_handler = proc_dointvec,
1819 },
0c12582f
JA		 1820 {
1821 .procname = "backup_only",
1822 .maxlen = sizeof(int),
1823 .mode = 0644,
1824 .proc_handler = proc_dointvec,
1825 },
d752c364
MRL		 1826 {
1827 .procname = "conn_reuse_mode",
1828 .maxlen = sizeof(int),
1829 .mode = 0644,
1830 .proc_handler = proc_dointvec,
1831 },
a0840e2e
HS		 1832#ifdef CONFIG_IP_VS_DEBUG
1833 {
1834 .procname = "debug_level",
1835 .data = &sysctl_ip_vs_debug_level,
1836 .maxlen = sizeof(int),
1837 .mode = 0644,
1838 .proc_handler = proc_dointvec,
1839 },
1da177e4 1840#endif
f8572d8f 1841 { }
1da177e4
LT		 1842};
1843
14e40546 1844#endif
1da177e4 1845
1da177e4
LT		 1846#ifdef CONFIG_PROC_FS
1847
1848struct ip_vs_iter {
fc723250 1849 struct seq_net_private p; /* Do not move this, netns depends upon it*/
ceec4c38 1850 struct hlist_head *table;
1da177e4
LT		 1851 int bucket;
1852};
1853
1854/*
1855 * Write the contents of the VS rule table to a PROCfs file.
1856 * (It is kept just for backward compatibility)
1857 */
95c96174 1858static inline const char *ip_vs_fwd_name(unsigned int flags)
1da177e4
LT		 1859{
1860 switch (flags & IP_VS_CONN_F_FWD_MASK) {
1861 case IP_VS_CONN_F_LOCALNODE:
1862 return "Local";
1863 case IP_VS_CONN_F_TUNNEL:
1864 return "Tunnel";
1865 case IP_VS_CONN_F_DROUTE:
1866 return "Route";
1867 default:
1868 return "Masq";
1869 }
1870}
1871
1872
1873/* Get the Nth entry in the two lists */
1874static struct ip_vs_service *ip_vs_info_array(struct seq_file *seq, loff_t pos)
1875{
fc723250 1876 struct net *net = seq_file_net(seq);
1da177e4
LT		 1877 struct ip_vs_iter *iter = seq->private;
1878 int idx;
1879 struct ip_vs_service *svc;
1880
1881 /* look in hash by protocol */
1882 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38 1883 hlist_for_each_entry_rcu(svc, &ip_vs_svc_table[idx], s_list) {
fc723250 1884 if (net_eq(svc->net, net) && pos-- == 0) {
1da177e4
LT		 1885 iter->table = ip_vs_svc_table;
1886 iter->bucket = idx;
1887 return svc;
1888 }
1889 }
1890 }
1891
1892 /* keep looking in fwmark */
1893 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38
JA		 1894 hlist_for_each_entry_rcu(svc, &ip_vs_svc_fwm_table[idx],
1895 f_list) {
fc723250 1896 if (net_eq(svc->net, net) && pos-- == 0) {
1da177e4
LT		 1897 iter->table = ip_vs_svc_fwm_table;
1898 iter->bucket = idx;
1899 return svc;
1900 }
1901 }
1902 }
1903
1904 return NULL;
1905}
1906
1907static void *ip_vs_info_seq_start(struct seq_file *seq, loff_t *pos)
371990ee 1908 __acquires(RCU)
1da177e4 1909{
ceec4c38 1910 rcu_read_lock();
1da177e4
LT		 1911 return *pos ? ip_vs_info_array(seq, *pos - 1) : SEQ_START_TOKEN;
1912}
1913
1914
1915static void *ip_vs_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1916{
ceec4c38 1917 struct hlist_node *e;
1da177e4
LT		 1918 struct ip_vs_iter *iter;
1919 struct ip_vs_service *svc;
1920
1921 ++*pos;
1922 if (v == SEQ_START_TOKEN)
1923 return ip_vs_info_array(seq,0);
1924
1925 svc = v;
1926 iter = seq->private;
1927
1928 if (iter->table == ip_vs_svc_table) {
1929 /* next service in table hashed by protocol */
ceec4c38
JA		 1930 e = rcu_dereference(hlist_next_rcu(&svc->s_list));
1931 if (e)
1932 return hlist_entry(e, struct ip_vs_service, s_list);
1da177e4
LT		 1933
1934 while (++iter->bucket < IP_VS_SVC_TAB_SIZE) {
ceec4c38
JA		 1935 hlist_for_each_entry_rcu(svc,
1936 &ip_vs_svc_table[iter->bucket],
1937 s_list) {
1da177e4
LT		 1938 return svc;
1939 }
1940 }
1941
1942 iter->table = ip_vs_svc_fwm_table;
1943 iter->bucket = -1;
1944 goto scan_fwmark;
1945 }
1946
1947 /* next service in hashed by fwmark */
ceec4c38
JA		 1948 e = rcu_dereference(hlist_next_rcu(&svc->f_list));
1949 if (e)
1950 return hlist_entry(e, struct ip_vs_service, f_list);
1da177e4
LT		 1951
1952 scan_fwmark:
1953 while (++iter->bucket < IP_VS_SVC_TAB_SIZE) {
ceec4c38
JA		 1954 hlist_for_each_entry_rcu(svc,
1955 &ip_vs_svc_fwm_table[iter->bucket],
1956 f_list)
1da177e4
LT		 1957 return svc;
1958 }
1959
1960 return NULL;
1961}
1962
1963static void ip_vs_info_seq_stop(struct seq_file *seq, void *v)
371990ee 1964 __releases(RCU)
1da177e4 1965{
ceec4c38 1966 rcu_read_unlock();
1da177e4
LT		 1967}
1968
1969
1970static int ip_vs_info_seq_show(struct seq_file *seq, void *v)
1971{
1972 if (v == SEQ_START_TOKEN) {
1973 seq_printf(seq,
1974 "IP Virtual Server version %d.%d.%d (size=%d)\n",
6f7edb48 1975 NVERSION(IP_VS_VERSION_CODE), ip_vs_conn_tab_size);
1da177e4
LT		 1976 seq_puts(seq,
1977 "Prot LocalAddress:Port Scheduler Flags\n");
1978 seq_puts(seq,
1979 " -> RemoteAddress:Port Forward Weight ActiveConn InActConn\n");
1980 } else {
1981 const struct ip_vs_service *svc = v;
1982 const struct ip_vs_iter *iter = seq->private;
1983 const struct ip_vs_dest *dest;
ceec4c38 1984 struct ip_vs_scheduler *sched = rcu_dereference(svc->scheduler);
1da177e4 1985
667a5f18
VB		 1986 if (iter->table == ip_vs_svc_table) {
1987#ifdef CONFIG_IP_VS_IPV6
1988 if (svc->af == AF_INET6)
5b095d98 1989 seq_printf(seq, "%s [%pI6]:%04X %s ",
667a5f18 1990 ip_vs_proto_name(svc->protocol),
38ff4fa4 1991 &svc->addr.in6,
667a5f18 1992 ntohs(svc->port),
ceec4c38 1993 sched->name);
667a5f18
VB		 1994 else
1995#endif
26ec037f 1996 seq_printf(seq, "%s %08X:%04X %s %s ",
667a5f18
VB		 1997 ip_vs_proto_name(svc->protocol),
1998 ntohl(svc->addr.ip),
1999 ntohs(svc->port),
ceec4c38 2000 sched->name,
26ec037f 2001 (svc->flags & IP_VS_SVC_F_ONEPACKET)?"ops ":"");
667a5f18 2002 } else {
26ec037f 2003 seq_printf(seq, "FWM %08X %s %s",
ceec4c38 2004 svc->fwmark, sched->name,
26ec037f 2005 (svc->flags & IP_VS_SVC_F_ONEPACKET)?"ops ":"");
667a5f18 2006 }
1da177e4
LT		 2007
2008 if (svc->flags & IP_VS_SVC_F_PERSISTENT)
2009 seq_printf(seq, "persistent %d %08X\n",
2010 svc->timeout,
2011 ntohl(svc->netmask));
2012 else
2013 seq_putc(seq, '\n');
2014
413c2d04 2015 list_for_each_entry_rcu(dest, &svc->destinations, n_list) {
667a5f18
VB		 2016#ifdef CONFIG_IP_VS_IPV6
2017 if (dest->af == AF_INET6)
2018 seq_printf(seq,
5b095d98 2019 " -> [%pI6]:%04X"
667a5f18 2020 " %-7s %-6d %-10d %-10d\n",
38ff4fa4 2021 &dest->addr.in6,
667a5f18
VB		 2022 ntohs(dest->port),
2023 ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
2024 atomic_read(&dest->weight),
2025 atomic_read(&dest->activeconns),
2026 atomic_read(&dest->inactconns));
2027 else
2028#endif
2029 seq_printf(seq,
2030 " -> %08X:%04X "
2031 "%-7s %-6d %-10d %-10d\n",
2032 ntohl(dest->addr.ip),
2033 ntohs(dest->port),
2034 ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
2035 atomic_read(&dest->weight),
2036 atomic_read(&dest->activeconns),
2037 atomic_read(&dest->inactconns));
2038
1da177e4
LT		 2039 }
2040 }
2041 return 0;
2042}
2043
56b3d975 2044static const struct seq_operations ip_vs_info_seq_ops = {
1da177e4
LT		 2045 .start = ip_vs_info_seq_start,
2046 .next = ip_vs_info_seq_next,
2047 .stop = ip_vs_info_seq_stop,
2048 .show = ip_vs_info_seq_show,
2049};
2050
2051static int ip_vs_info_open(struct inode *inode, struct file *file)
2052{
fc723250 2053 return seq_open_net(inode, file, &ip_vs_info_seq_ops,
cf7732e4 2054 sizeof(struct ip_vs_iter));
1da177e4
LT		 2055}
2056
9a32144e 2057static const struct file_operations ip_vs_info_fops = {
1da177e4
LT		 2058 .owner = THIS_MODULE,
2059 .open = ip_vs_info_open,
2060 .read = seq_read,
2061 .llseek = seq_lseek,
0f08190f 2062 .release = seq_release_net,
1da177e4
LT		 2063};
2064
1da177e4
LT		 2065static int ip_vs_stats_show(struct seq_file *seq, void *v)
2066{
b17fc996 2067 struct net *net = seq_file_single_net(seq);
cd67cd5e 2068 struct ip_vs_kstats show;
1da177e4
LT		 2069
2070/* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2071 seq_puts(seq,
2072 " Total Incoming Outgoing Incoming Outgoing\n");
2073 seq_printf(seq,
2074 " Conns Packets Packets Bytes Bytes\n");
2075
55a3d4e1 2076 ip_vs_copy_stats(&show, &net_ipvs(net)->tot_stats);
cd67cd5e
JA		 2077 seq_printf(seq, "%8LX %8LX %8LX %16LX %16LX\n\n",
2078 (unsigned long long)show.conns,
2079 (unsigned long long)show.inpkts,
2080 (unsigned long long)show.outpkts,
2081 (unsigned long long)show.inbytes,
2082 (unsigned long long)show.outbytes);
2083
2084/* 01234567 01234567 01234567 0123456701234567 0123456701234567*/
1da177e4 2085 seq_puts(seq,
cd67cd5e
JA		 2086 " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
2087 seq_printf(seq, "%8LX %8LX %8LX %16LX %16LX\n",
2088 (unsigned long long)show.cps,
2089 (unsigned long long)show.inpps,
2090 (unsigned long long)show.outpps,
2091 (unsigned long long)show.inbps,
2092 (unsigned long long)show.outbps);
1da177e4
LT		 2093
2094 return 0;
2095}
2096
2097static int ip_vs_stats_seq_open(struct inode *inode, struct file *file)
2098{
fc723250 2099 return single_open_net(inode, file, ip_vs_stats_show);
1da177e4
LT		 2100}
2101
9a32144e 2102static const struct file_operations ip_vs_stats_fops = {
1da177e4
LT		 2103 .owner = THIS_MODULE,
2104 .open = ip_vs_stats_seq_open,
2105 .read = seq_read,
2106 .llseek = seq_lseek,
0f08190f 2107 .release = single_release_net,
1da177e4
LT		 2108};
2109
b17fc996
HS		 2110static int ip_vs_stats_percpu_show(struct seq_file *seq, void *v)
2111{
2112 struct net *net = seq_file_single_net(seq);
2a0751af 2113 struct ip_vs_stats *tot_stats = &net_ipvs(net)->tot_stats;
371990ee 2114 struct ip_vs_cpu_stats __percpu *cpustats = tot_stats->cpustats;
cd67cd5e 2115 struct ip_vs_kstats kstats;
b17fc996
HS		 2116 int i;
2117
2118/* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2119 seq_puts(seq,
2120 " Total Incoming Outgoing Incoming Outgoing\n");
2121 seq_printf(seq,
2122 "CPU Conns Packets Packets Bytes Bytes\n");
2123
2124 for_each_possible_cpu(i) {
2a0751af
JA		 2125 struct ip_vs_cpu_stats *u = per_cpu_ptr(cpustats, i);
2126 unsigned int start;
cd67cd5e 2127 u64 conns, inpkts, outpkts, inbytes, outbytes;
2a0751af
JA		 2128
2129 do {
57a7744e 2130 start = u64_stats_fetch_begin_irq(&u->syncp);
cd67cd5e
JA		 2131 conns = u->cnt.conns;
2132 inpkts = u->cnt.inpkts;
2133 outpkts = u->cnt.outpkts;
2134 inbytes = u->cnt.inbytes;
2135 outbytes = u->cnt.outbytes;
57a7744e 2136 } while (u64_stats_fetch_retry_irq(&u->syncp, start));
2a0751af 2137
cd67cd5e
JA		 2138 seq_printf(seq, "%3X %8LX %8LX %8LX %16LX %16LX\n",
2139 i, (u64)conns, (u64)inpkts,
2140 (u64)outpkts, (u64)inbytes,
2141 (u64)outbytes);
b17fc996
HS		 2142 }
2143
cd67cd5e 2144 ip_vs_copy_stats(&kstats, tot_stats);
ea9f22cc 2145
cd67cd5e
JA		 2146 seq_printf(seq, " ~ %8LX %8LX %8LX %16LX %16LX\n\n",
2147 (unsigned long long)kstats.conns,
2148 (unsigned long long)kstats.inpkts,
2149 (unsigned long long)kstats.outpkts,
2150 (unsigned long long)kstats.inbytes,
2151 (unsigned long long)kstats.outbytes);
ea9f22cc 2152
cd67cd5e 2153/* ... 01234567 01234567 01234567 0123456701234567 0123456701234567 */
b17fc996 2154 seq_puts(seq,
cd67cd5e
JA		 2155 " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
2156 seq_printf(seq, " %8LX %8LX %8LX %16LX %16LX\n",
2157 kstats.cps,
2158 kstats.inpps,
2159 kstats.outpps,
2160 kstats.inbps,
2161 kstats.outbps);
b17fc996
HS		 2162
2163 return 0;
2164}
2165
2166static int ip_vs_stats_percpu_seq_open(struct inode *inode, struct file *file)
2167{
2168 return single_open_net(inode, file, ip_vs_stats_percpu_show);
2169}
2170
2171static const struct file_operations ip_vs_stats_percpu_fops = {
2172 .owner = THIS_MODULE,
2173 .open = ip_vs_stats_percpu_seq_open,
2174 .read = seq_read,
2175 .llseek = seq_lseek,
0f08190f 2176 .release = single_release_net,
b17fc996 2177};
1da177e4
LT		 2178#endif
2179
2180/*
2181 * Set timeout values for tcp tcpfin udp in the timeout_table.
2182 */
9330419d 2183static int ip_vs_set_timeout(struct net *net, struct ip_vs_timeout_user *u)
1da177e4 2184{
091bb34c 2185#if defined(CONFIG_IP_VS_PROTO_TCP) || defined(CONFIG_IP_VS_PROTO_UDP)
9330419d 2186 struct ip_vs_proto_data *pd;
091bb34c 2187#endif
9330419d 2188
1da177e4
LT		 2189 IP_VS_DBG(2, "Setting timeout tcp:%d tcpfin:%d udp:%d\n",
2190 u->tcp_timeout,
2191 u->tcp_fin_timeout,
2192 u->udp_timeout);
2193
2194#ifdef CONFIG_IP_VS_PROTO_TCP
2195 if (u->tcp_timeout) {
9330419d
HS		 2196 pd = ip_vs_proto_data_get(net, IPPROTO_TCP);
2197 pd->timeout_table[IP_VS_TCP_S_ESTABLISHED]
1da177e4
LT		 2198 = u->tcp_timeout * HZ;
2199 }
2200
2201 if (u->tcp_fin_timeout) {
9330419d
HS		 2202 pd = ip_vs_proto_data_get(net, IPPROTO_TCP);
2203 pd->timeout_table[IP_VS_TCP_S_FIN_WAIT]
1da177e4
LT		 2204 = u->tcp_fin_timeout * HZ;
2205 }
2206#endif
2207
2208#ifdef CONFIG_IP_VS_PROTO_UDP
2209 if (u->udp_timeout) {
9330419d
HS		 2210 pd = ip_vs_proto_data_get(net, IPPROTO_UDP);
2211 pd->timeout_table[IP_VS_UDP_S_NORMAL]
1da177e4
LT		 2212 = u->udp_timeout * HZ;
2213 }
2214#endif
2215 return 0;
2216}
2217
5fcf0cf6 2218#define CMDID(cmd) (cmd - IP_VS_BASE_CTL)
1da177e4 2219
5fcf0cf6
JA		 2220struct ip_vs_svcdest_user {
2221 struct ip_vs_service_user s;
2222 struct ip_vs_dest_user d;
1da177e4
LT		 2223};
2224
5fcf0cf6
JA		 2225static const unsigned char set_arglen[CMDID(IP_VS_SO_SET_MAX) + 1] = {
2226 [CMDID(IP_VS_SO_SET_ADD)] = sizeof(struct ip_vs_service_user),
2227 [CMDID(IP_VS_SO_SET_EDIT)] = sizeof(struct ip_vs_service_user),
2228 [CMDID(IP_VS_SO_SET_DEL)] = sizeof(struct ip_vs_service_user),
2229 [CMDID(IP_VS_SO_SET_ADDDEST)] = sizeof(struct ip_vs_svcdest_user),
2230 [CMDID(IP_VS_SO_SET_DELDEST)] = sizeof(struct ip_vs_svcdest_user),
2231 [CMDID(IP_VS_SO_SET_EDITDEST)] = sizeof(struct ip_vs_svcdest_user),
2232 [CMDID(IP_VS_SO_SET_TIMEOUT)] = sizeof(struct ip_vs_timeout_user),
2233 [CMDID(IP_VS_SO_SET_STARTDAEMON)] = sizeof(struct ip_vs_daemon_user),
2234 [CMDID(IP_VS_SO_SET_STOPDAEMON)] = sizeof(struct ip_vs_daemon_user),
2235 [CMDID(IP_VS_SO_SET_ZERO)] = sizeof(struct ip_vs_service_user),
2236};
2237
2238union ip_vs_set_arglen {
2239 struct ip_vs_service_user field_IP_VS_SO_SET_ADD;
2240 struct ip_vs_service_user field_IP_VS_SO_SET_EDIT;
2241 struct ip_vs_service_user field_IP_VS_SO_SET_DEL;
2242 struct ip_vs_svcdest_user field_IP_VS_SO_SET_ADDDEST;
2243 struct ip_vs_svcdest_user field_IP_VS_SO_SET_DELDEST;
2244 struct ip_vs_svcdest_user field_IP_VS_SO_SET_EDITDEST;
2245 struct ip_vs_timeout_user field_IP_VS_SO_SET_TIMEOUT;
2246 struct ip_vs_daemon_user field_IP_VS_SO_SET_STARTDAEMON;
2247 struct ip_vs_daemon_user field_IP_VS_SO_SET_STOPDAEMON;
2248 struct ip_vs_service_user field_IP_VS_SO_SET_ZERO;
2249};
2250
2251#define MAX_SET_ARGLEN sizeof(union ip_vs_set_arglen)
2252
c860c6b1
JV		 2253static void ip_vs_copy_usvc_compat(struct ip_vs_service_user_kern *usvc,
2254 struct ip_vs_service_user *usvc_compat)
2255{
0d1e71b0
SH		 2256 memset(usvc, 0, sizeof(*usvc));
2257
c860c6b1
JV		 2258 usvc->af = AF_INET;
2259 usvc->protocol = usvc_compat->protocol;
2260 usvc->addr.ip = usvc_compat->addr;
2261 usvc->port = usvc_compat->port;
2262 usvc->fwmark = usvc_compat->fwmark;
2263
2264 /* Deep copy of sched_name is not needed here */
2265 usvc->sched_name = usvc_compat->sched_name;
2266
2267 usvc->flags = usvc_compat->flags;
2268 usvc->timeout = usvc_compat->timeout;
2269 usvc->netmask = usvc_compat->netmask;
2270}
2271
2272static void ip_vs_copy_udest_compat(struct ip_vs_dest_user_kern *udest,
2273 struct ip_vs_dest_user *udest_compat)
2274{
0d1e71b0
SH		 2275 memset(udest, 0, sizeof(*udest));
2276
c860c6b1
JV		 2277 udest->addr.ip = udest_compat->addr;
2278 udest->port = udest_compat->port;
2279 udest->conn_flags = udest_compat->conn_flags;
2280 udest->weight = udest_compat->weight;
2281 udest->u_threshold = udest_compat->u_threshold;
2282 udest->l_threshold = udest_compat->l_threshold;
6cff339b 2283 udest->af = AF_INET;
c860c6b1
JV		 2284}
2285
1da177e4
LT		 2286static int
2287do_ip_vs_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len)
2288{
fc723250 2289 struct net *net = sock_net(sk);
1da177e4 2290 int ret;
5fcf0cf6 2291 unsigned char arg[MAX_SET_ARGLEN];
c860c6b1
JV		 2292 struct ip_vs_service_user *usvc_compat;
2293 struct ip_vs_service_user_kern usvc;
1da177e4 2294 struct ip_vs_service *svc;
c860c6b1
JV		 2295 struct ip_vs_dest_user *udest_compat;
2296 struct ip_vs_dest_user_kern udest;
ae1d48b2 2297 struct netns_ipvs *ipvs = net_ipvs(net);
1da177e4 2298
5fcf0cf6 2299 BUILD_BUG_ON(sizeof(arg) > 255);
df008c91 2300 if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
1da177e4
LT		 2301 return -EPERM;
2302
04bcef2a
AV		 2303 if (cmd < IP_VS_BASE_CTL || cmd > IP_VS_SO_SET_MAX)
2304 return -EINVAL;
5fcf0cf6
JA		 2305 if (len != set_arglen[CMDID(cmd)]) {
2306 IP_VS_DBG(1, "set_ctl: len %u != %u\n",
2307 len, set_arglen[CMDID(cmd)]);
1da177e4
LT		 2308 return -EINVAL;
2309 }
2310
2311 if (copy_from_user(arg, user, len) != 0)
2312 return -EFAULT;
2313
2314 /* increase the module use count */
2315 ip_vs_use_count_inc();
2316
ae1d48b2
HS		 2317 /* Handle daemons since they have another lock */
2318 if (cmd == IP_VS_SO_SET_STARTDAEMON ||
2319 cmd == IP_VS_SO_SET_STOPDAEMON) {
2320 struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg;
2321
7926dbfa 2322 mutex_lock(&ipvs->sync_mutex);
ae1d48b2
HS		 2323 if (cmd == IP_VS_SO_SET_STARTDAEMON)
2324 ret = start_sync_thread(net, dm->state, dm->mcast_ifn,
2325 dm->syncid);
2326 else
2327 ret = stop_sync_thread(net, dm->state);
2328 mutex_unlock(&ipvs->sync_mutex);
2329 goto out_dec;
2330 }
2331
7926dbfa 2332 mutex_lock(&__ip_vs_mutex);
1da177e4
LT		 2333 if (cmd == IP_VS_SO_SET_FLUSH) {
2334 /* Flush the virtual service */
578bc3ef 2335 ret = ip_vs_flush(net, false);
1da177e4
LT		 2336 goto out_unlock;
2337 } else if (cmd == IP_VS_SO_SET_TIMEOUT) {
2338 /* Set timeout values for (tcp tcpfin udp) */
9330419d 2339 ret = ip_vs_set_timeout(net, (struct ip_vs_timeout_user *)arg);
1da177e4 2340 goto out_unlock;
1da177e4
LT		 2341 }
2342
c860c6b1
JV		 2343 usvc_compat = (struct ip_vs_service_user *)arg;
2344 udest_compat = (struct ip_vs_dest_user *)(usvc_compat + 1);
2345
2346 /* We only use the new structs internally, so copy userspace compat
2347 * structs to extended internal versions */
2348 ip_vs_copy_usvc_compat(&usvc, usvc_compat);
2349 ip_vs_copy_udest_compat(&udest, udest_compat);
1da177e4
LT		 2350
2351 if (cmd == IP_VS_SO_SET_ZERO) {
2352 /* if no service address is set, zero counters in all */
c860c6b1 2353 if (!usvc.fwmark && !usvc.addr.ip && !usvc.port) {
fc723250 2354 ret = ip_vs_zero_all(net);
1da177e4
LT		 2355 goto out_unlock;
2356 }
2357 }
2358
2906f66a
VMR		 2359 /* Check for valid protocol: TCP or UDP or SCTP, even for fwmark!=0 */
2360 if (usvc.protocol != IPPROTO_TCP && usvc.protocol != IPPROTO_UDP &&
2361 usvc.protocol != IPPROTO_SCTP) {
1e3e238e
HE		 2362 pr_err("set_ctl: invalid protocol: %d %pI4:%d %s\n",
2363 usvc.protocol, &usvc.addr.ip,
2364 ntohs(usvc.port), usvc.sched_name);
1da177e4
LT		 2365 ret = -EFAULT;
2366 goto out_unlock;
2367 }
2368
2369 /* Lookup the exact service by <protocol, addr, port> or fwmark */
ceec4c38 2370 rcu_read_lock();
c860c6b1 2371 if (usvc.fwmark == 0)
fc723250 2372 svc = __ip_vs_service_find(net, usvc.af, usvc.protocol,
26c15cfd 2373 &usvc.addr, usvc.port);
1da177e4 2374 else
fc723250 2375 svc = __ip_vs_svc_fwm_find(net, usvc.af, usvc.fwmark);
ceec4c38 2376 rcu_read_unlock();
1da177e4
LT		 2377
2378 if (cmd != IP_VS_SO_SET_ADD
c860c6b1 2379 && (svc == NULL || svc->protocol != usvc.protocol)) {
1da177e4 2380 ret = -ESRCH;
26c15cfd 2381 goto out_unlock;
1da177e4
LT		 2382 }
2383
2384 switch (cmd) {
2385 case IP_VS_SO_SET_ADD:
2386 if (svc != NULL)
2387 ret = -EEXIST;
2388 else
fc723250 2389 ret = ip_vs_add_service(net, &usvc, &svc);
1da177e4
LT		 2390 break;
2391 case IP_VS_SO_SET_EDIT:
c860c6b1 2392 ret = ip_vs_edit_service(svc, &usvc);
1da177e4
LT		 2393 break;
2394 case IP_VS_SO_SET_DEL:
2395 ret = ip_vs_del_service(svc);
2396 if (!ret)
2397 goto out_unlock;
2398 break;
2399 case IP_VS_SO_SET_ZERO:
2400 ret = ip_vs_zero_service(svc);
2401 break;
2402 case IP_VS_SO_SET_ADDDEST:
c860c6b1 2403 ret = ip_vs_add_dest(svc, &udest);
1da177e4
LT		 2404 break;
2405 case IP_VS_SO_SET_EDITDEST:
c860c6b1 2406 ret = ip_vs_edit_dest(svc, &udest);
1da177e4
LT		 2407 break;
2408 case IP_VS_SO_SET_DELDEST:
c860c6b1 2409 ret = ip_vs_del_dest(svc, &udest);
1da177e4
LT		 2410 break;
2411 default:
2412 ret = -EINVAL;
2413 }
2414
1da177e4 2415 out_unlock:
14cc3e2b 2416 mutex_unlock(&__ip_vs_mutex);
1da177e4
LT		 2417 out_dec:
2418 /* decrease the module use count */
2419 ip_vs_use_count_dec();
2420
2421 return ret;
2422}
2423
2424
1da177e4
LT		 2425static void
2426ip_vs_copy_service(struct ip_vs_service_entry *dst, struct ip_vs_service *src)
2427{
ceec4c38 2428 struct ip_vs_scheduler *sched;
cd67cd5e 2429 struct ip_vs_kstats kstats;
ceec4c38
JA		 2430
2431 sched = rcu_dereference_protected(src->scheduler, 1);
1da177e4 2432 dst->protocol = src->protocol;
e7ade46a 2433 dst->addr = src->addr.ip;
1da177e4
LT		 2434 dst->port = src->port;
2435 dst->fwmark = src->fwmark;
ceec4c38 2436 strlcpy(dst->sched_name, sched->name, sizeof(dst->sched_name));
1da177e4
LT		 2437 dst->flags = src->flags;
2438 dst->timeout = src->timeout / HZ;
2439 dst->netmask = src->netmask;
2440 dst->num_dests = src->num_dests;
cd67cd5e
JA		 2441 ip_vs_copy_stats(&kstats, &src->stats);
2442 ip_vs_export_stats_user(&dst->stats, &kstats);
1da177e4
LT		 2443}
2444
2445static inline int
fc723250
HS		 2446__ip_vs_get_service_entries(struct net *net,
2447 const struct ip_vs_get_services *get,
1da177e4
LT		 2448 struct ip_vs_get_services __user *uptr)
2449{
2450 int idx, count=0;
2451 struct ip_vs_service *svc;
2452 struct ip_vs_service_entry entry;
2453 int ret = 0;
2454
2455 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38 2456 hlist_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
f94fd041 2457 /* Only expose IPv4 entries to old interface */
fc723250 2458 if (svc->af != AF_INET || !net_eq(svc->net, net))
f94fd041
JV		 2459 continue;
2460
1da177e4
LT		 2461 if (count >= get->num_services)
2462 goto out;
4da62fc7 2463 memset(&entry, 0, sizeof(entry));
1da177e4
LT		 2464 ip_vs_copy_service(&entry, svc);
2465 if (copy_to_user(&uptr->entrytable[count],
2466 &entry, sizeof(entry))) {
2467 ret = -EFAULT;
2468 goto out;
2469 }
2470 count++;
2471 }
2472 }
2473
2474 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38 2475 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
f94fd041 2476 /* Only expose IPv4 entries to old interface */
fc723250 2477 if (svc->af != AF_INET || !net_eq(svc->net, net))
f94fd041
JV		 2478 continue;
2479
1da177e4
LT		 2480 if (count >= get->num_services)
2481 goto out;
4da62fc7 2482 memset(&entry, 0, sizeof(entry));
1da177e4
LT		 2483 ip_vs_copy_service(&entry, svc);
2484 if (copy_to_user(&uptr->entrytable[count],
2485 &entry, sizeof(entry))) {
2486 ret = -EFAULT;
2487 goto out;
2488 }
2489 count++;
2490 }
2491 }
552ad65a 2492out:
1da177e4
LT		 2493 return ret;
2494}
2495
2496static inline int
fc723250 2497__ip_vs_get_dest_entries(struct net *net, const struct ip_vs_get_dests *get,
1da177e4
LT		 2498 struct ip_vs_get_dests __user *uptr)
2499{
2500 struct ip_vs_service *svc;
b18610de 2501 union nf_inet_addr addr = { .ip = get->addr };
1da177e4
LT		 2502 int ret = 0;
2503
ceec4c38 2504 rcu_read_lock();
1da177e4 2505 if (get->fwmark)
fc723250 2506 svc = __ip_vs_svc_fwm_find(net, AF_INET, get->fwmark);
1da177e4 2507 else
fc723250 2508 svc = __ip_vs_service_find(net, AF_INET, get->protocol, &addr,
26c15cfd 2509 get->port);
ceec4c38 2510 rcu_read_unlock();
b18610de 2511
1da177e4
LT		 2512 if (svc) {
2513 int count = 0;
2514 struct ip_vs_dest *dest;
2515 struct ip_vs_dest_entry entry;
cd67cd5e 2516 struct ip_vs_kstats kstats;
1da177e4 2517
a8241c63 2518 memset(&entry, 0, sizeof(entry));
1da177e4
LT		 2519 list_for_each_entry(dest, &svc->destinations, n_list) {
2520 if (count >= get->num_dests)
2521 break;
2522
6cff339b
AG		 2523 /* Cannot expose heterogeneous members via sockopt
2524 * interface
2525 */
2526 if (dest->af != svc->af)
2527 continue;
2528
e7ade46a 2529 entry.addr = dest->addr.ip;
1da177e4
LT		 2530 entry.port = dest->port;
2531 entry.conn_flags = atomic_read(&dest->conn_flags);
2532 entry.weight = atomic_read(&dest->weight);
2533 entry.u_threshold = dest->u_threshold;
2534 entry.l_threshold = dest->l_threshold;
2535 entry.activeconns = atomic_read(&dest->activeconns);
2536 entry.inactconns = atomic_read(&dest->inactconns);
2537 entry.persistconns = atomic_read(&dest->persistconns);
cd67cd5e
JA		 2538 ip_vs_copy_stats(&kstats, &dest->stats);
2539 ip_vs_export_stats_user(&entry.stats, &kstats);
1da177e4
LT		 2540 if (copy_to_user(&uptr->entrytable[count],
2541 &entry, sizeof(entry))) {
2542 ret = -EFAULT;
2543 break;
2544 }
2545 count++;
2546 }
1da177e4
LT		 2547 } else
2548 ret = -ESRCH;
2549 return ret;
2550}
2551
2552static inline void
9330419d 2553__ip_vs_get_timeouts(struct net *net, struct ip_vs_timeout_user *u)
1da177e4 2554{
091bb34c 2555#if defined(CONFIG_IP_VS_PROTO_TCP) || defined(CONFIG_IP_VS_PROTO_UDP)
9330419d 2556 struct ip_vs_proto_data *pd;
091bb34c 2557#endif
9330419d 2558
b61a602e
AB		 2559 memset(u, 0, sizeof (*u));
2560
1da177e4 2561#ifdef CONFIG_IP_VS_PROTO_TCP
9330419d
HS		 2562 pd = ip_vs_proto_data_get(net, IPPROTO_TCP);
2563 u->tcp_timeout = pd->timeout_table[IP_VS_TCP_S_ESTABLISHED] / HZ;
2564 u->tcp_fin_timeout = pd->timeout_table[IP_VS_TCP_S_FIN_WAIT] / HZ;
1da177e4
LT		 2565#endif
2566#ifdef CONFIG_IP_VS_PROTO_UDP
9330419d 2567 pd = ip_vs_proto_data_get(net, IPPROTO_UDP);
1da177e4 2568 u->udp_timeout =
9330419d 2569 pd->timeout_table[IP_VS_UDP_S_NORMAL] / HZ;
1da177e4
LT		 2570#endif
2571}
2572
5fcf0cf6
JA		 2573static const unsigned char get_arglen[CMDID(IP_VS_SO_GET_MAX) + 1] = {
2574 [CMDID(IP_VS_SO_GET_VERSION)] = 64,
2575 [CMDID(IP_VS_SO_GET_INFO)] = sizeof(struct ip_vs_getinfo),
2576 [CMDID(IP_VS_SO_GET_SERVICES)] = sizeof(struct ip_vs_get_services),
2577 [CMDID(IP_VS_SO_GET_SERVICE)] = sizeof(struct ip_vs_service_entry),
2578 [CMDID(IP_VS_SO_GET_DESTS)] = sizeof(struct ip_vs_get_dests),
2579 [CMDID(IP_VS_SO_GET_TIMEOUT)] = sizeof(struct ip_vs_timeout_user),
2580 [CMDID(IP_VS_SO_GET_DAEMON)] = 2 * sizeof(struct ip_vs_daemon_user),
2581};
1da177e4 2582
5fcf0cf6
JA		 2583union ip_vs_get_arglen {
2584 char field_IP_VS_SO_GET_VERSION[64];
2585 struct ip_vs_getinfo field_IP_VS_SO_GET_INFO;
2586 struct ip_vs_get_services field_IP_VS_SO_GET_SERVICES;
2587 struct ip_vs_service_entry field_IP_VS_SO_GET_SERVICE;
2588 struct ip_vs_get_dests field_IP_VS_SO_GET_DESTS;
2589 struct ip_vs_timeout_user field_IP_VS_SO_GET_TIMEOUT;
2590 struct ip_vs_daemon_user field_IP_VS_SO_GET_DAEMON[2];
1da177e4
LT		 2591};
2592
5fcf0cf6
JA		 2593#define MAX_GET_ARGLEN sizeof(union ip_vs_get_arglen)
2594
1da177e4
LT		 2595static int
2596do_ip_vs_get_ctl(struct sock *sk, int cmd, void __user *user, int *len)
2597{
5fcf0cf6 2598 unsigned char arg[MAX_GET_ARGLEN];
1da177e4 2599 int ret = 0;
04bcef2a 2600 unsigned int copylen;
fc723250 2601 struct net *net = sock_net(sk);
f131315f 2602 struct netns_ipvs *ipvs = net_ipvs(net);
1da177e4 2603
fc723250 2604 BUG_ON(!net);
5fcf0cf6 2605 BUILD_BUG_ON(sizeof(arg) > 255);
df008c91 2606 if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
1da177e4
LT		 2607 return -EPERM;
2608
04bcef2a
AV		 2609 if (cmd < IP_VS_BASE_CTL || cmd > IP_VS_SO_GET_MAX)
2610 return -EINVAL;
2611
5fcf0cf6
JA		 2612 copylen = get_arglen[CMDID(cmd)];
2613 if (*len < (int) copylen) {
2614 IP_VS_DBG(1, "get_ctl: len %d < %u\n", *len, copylen);
1da177e4
LT		 2615 return -EINVAL;
2616 }
2617
04bcef2a 2618 if (copy_from_user(arg, user, copylen) != 0)
1da177e4 2619 return -EFAULT;
ae1d48b2
HS		 2620 /*
2621 * Handle daemons first since it has its own locking
2622 */
2623 if (cmd == IP_VS_SO_GET_DAEMON) {
2624 struct ip_vs_daemon_user d[2];
2625
2626 memset(&d, 0, sizeof(d));
7926dbfa 2627 mutex_lock(&ipvs->sync_mutex);
ae1d48b2
HS		 2628 if (ipvs->sync_state & IP_VS_STATE_MASTER) {
2629 d[0].state = IP_VS_STATE_MASTER;
2630 strlcpy(d[0].mcast_ifn, ipvs->master_mcast_ifn,
2631 sizeof(d[0].mcast_ifn));
2632 d[0].syncid = ipvs->master_syncid;
2633 }
2634 if (ipvs->sync_state & IP_VS_STATE_BACKUP) {
2635 d[1].state = IP_VS_STATE_BACKUP;
2636 strlcpy(d[1].mcast_ifn, ipvs->backup_mcast_ifn,
2637 sizeof(d[1].mcast_ifn));
2638 d[1].syncid = ipvs->backup_syncid;
2639 }
2640 if (copy_to_user(user, &d, sizeof(d)) != 0)
2641 ret = -EFAULT;
2642 mutex_unlock(&ipvs->sync_mutex);
2643 return ret;
2644 }
1da177e4 2645
7926dbfa 2646 mutex_lock(&__ip_vs_mutex);
1da177e4
LT		 2647 switch (cmd) {
2648 case IP_VS_SO_GET_VERSION:
2649 {
2650 char buf[64];
2651
2652 sprintf(buf, "IP Virtual Server version %d.%d.%d (size=%d)",
6f7edb48 2653 NVERSION(IP_VS_VERSION_CODE), ip_vs_conn_tab_size);
1da177e4
LT		 2654 if (copy_to_user(user, buf, strlen(buf)+1) != 0) {
2655 ret = -EFAULT;
2656 goto out;
2657 }
2658 *len = strlen(buf)+1;
2659 }
2660 break;
2661
2662 case IP_VS_SO_GET_INFO:
2663 {
2664 struct ip_vs_getinfo info;
2665 info.version = IP_VS_VERSION_CODE;
6f7edb48 2666 info.size = ip_vs_conn_tab_size;
a0840e2e 2667 info.num_services = ipvs->num_services;
1da177e4
LT		 2668 if (copy_to_user(user, &info, sizeof(info)) != 0)
2669 ret = -EFAULT;
2670 }
2671 break;
2672
2673 case IP_VS_SO_GET_SERVICES:
2674 {
2675 struct ip_vs_get_services *get;
2676 int size;
2677
2678 get = (struct ip_vs_get_services *)arg;
2679 size = sizeof(*get) +
2680 sizeof(struct ip_vs_service_entry) * get->num_services;
2681 if (*len != size) {
1e3e238e 2682 pr_err("length: %u != %u\n", *len, size);
1da177e4
LT		 2683 ret = -EINVAL;
2684 goto out;
2685 }
fc723250 2686 ret = __ip_vs_get_service_entries(net, get, user);
1da177e4
LT		 2687 }
2688 break;
2689
2690 case IP_VS_SO_GET_SERVICE:
2691 {
2692 struct ip_vs_service_entry *entry;
2693 struct ip_vs_service *svc;
b18610de 2694 union nf_inet_addr addr;
1da177e4
LT		 2695
2696 entry = (struct ip_vs_service_entry *)arg;
b18610de 2697 addr.ip = entry->addr;
ceec4c38 2698 rcu_read_lock();
1da177e4 2699 if (entry->fwmark)
fc723250 2700 svc = __ip_vs_svc_fwm_find(net, AF_INET, entry->fwmark);
1da177e4 2701 else
fc723250
HS		 2702 svc = __ip_vs_service_find(net, AF_INET,
2703 entry->protocol, &addr,
2704 entry->port);
ceec4c38 2705 rcu_read_unlock();
1da177e4
LT		 2706 if (svc) {
2707 ip_vs_copy_service(entry, svc);
2708 if (copy_to_user(user, entry, sizeof(*entry)) != 0)
2709 ret = -EFAULT;
1da177e4
LT		 2710 } else
2711 ret = -ESRCH;
2712 }
2713 break;
2714
2715 case IP_VS_SO_GET_DESTS:
2716 {
2717 struct ip_vs_get_dests *get;
2718 int size;
2719
2720 get = (struct ip_vs_get_dests *)arg;
2721 size = sizeof(*get) +
2722 sizeof(struct ip_vs_dest_entry) * get->num_dests;
2723 if (*len != size) {
1e3e238e 2724 pr_err("length: %u != %u\n", *len, size);
1da177e4
LT		 2725 ret = -EINVAL;
2726 goto out;
2727 }
fc723250 2728 ret = __ip_vs_get_dest_entries(net, get, user);
1da177e4
LT		 2729 }
2730 break;
2731
2732 case IP_VS_SO_GET_TIMEOUT:
2733 {
2734 struct ip_vs_timeout_user t;
2735
9330419d 2736 __ip_vs_get_timeouts(net, &t);
1da177e4
LT		 2737 if (copy_to_user(user, &t, sizeof(t)) != 0)
2738 ret = -EFAULT;
2739 }
2740 break;
2741
1da177e4
LT		 2742 default:
2743 ret = -EINVAL;
2744 }
2745
552ad65a 2746out:
14cc3e2b 2747 mutex_unlock(&__ip_vs_mutex);
1da177e4
LT		 2748 return ret;
2749}
2750
2751
2752static struct nf_sockopt_ops ip_vs_sockopts = {
2753 .pf = PF_INET,
2754 .set_optmin = IP_VS_BASE_CTL,
2755 .set_optmax = IP_VS_SO_SET_MAX+1,
2756 .set = do_ip_vs_set_ctl,
2757 .get_optmin = IP_VS_BASE_CTL,
2758 .get_optmax = IP_VS_SO_GET_MAX+1,
2759 .get = do_ip_vs_get_ctl,
16fcec35 2760 .owner = THIS_MODULE,
1da177e4
LT		 2761};
2762
9a812198
JV		 2763/*
2764 * Generic Netlink interface
2765 */
2766
2767/* IPVS genetlink family */
2768static struct genl_family ip_vs_genl_family = {
2769 .id = GENL_ID_GENERATE,
2770 .hdrsize = 0,
2771 .name = IPVS_GENL_NAME,
2772 .version = IPVS_GENL_VERSION,
2773 .maxattr = IPVS_CMD_MAX,
c6d2d445 2774 .netnsok = true, /* Make ipvsadm to work on netns */
9a812198
JV		 2775};
2776
2777/* Policy used for first-level command attributes */
2778static const struct nla_policy ip_vs_cmd_policy[IPVS_CMD_ATTR_MAX + 1] = {
2779 [IPVS_CMD_ATTR_SERVICE] = { .type = NLA_NESTED },
2780 [IPVS_CMD_ATTR_DEST] = { .type = NLA_NESTED },
2781 [IPVS_CMD_ATTR_DAEMON] = { .type = NLA_NESTED },
2782 [IPVS_CMD_ATTR_TIMEOUT_TCP] = { .type = NLA_U32 },
2783 [IPVS_CMD_ATTR_TIMEOUT_TCP_FIN] = { .type = NLA_U32 },
2784 [IPVS_CMD_ATTR_TIMEOUT_UDP] = { .type = NLA_U32 },
2785};
2786
2787/* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DAEMON */
2788static const struct nla_policy ip_vs_daemon_policy[IPVS_DAEMON_ATTR_MAX + 1] = {
2789 [IPVS_DAEMON_ATTR_STATE] = { .type = NLA_U32 },
2790 [IPVS_DAEMON_ATTR_MCAST_IFN] = { .type = NLA_NUL_STRING,
2791 .len = IP_VS_IFNAME_MAXLEN },
2792 [IPVS_DAEMON_ATTR_SYNC_ID] = { .type = NLA_U32 },
2793};
2794
2795/* Policy used for attributes in nested attribute IPVS_CMD_ATTR_SERVICE */
2796static const struct nla_policy ip_vs_svc_policy[IPVS_SVC_ATTR_MAX + 1] = {
2797 [IPVS_SVC_ATTR_AF] = { .type = NLA_U16 },
2798 [IPVS_SVC_ATTR_PROTOCOL] = { .type = NLA_U16 },
2799 [IPVS_SVC_ATTR_ADDR] = { .type = NLA_BINARY,
2800 .len = sizeof(union nf_inet_addr) },
2801 [IPVS_SVC_ATTR_PORT] = { .type = NLA_U16 },
2802 [IPVS_SVC_ATTR_FWMARK] = { .type = NLA_U32 },
2803 [IPVS_SVC_ATTR_SCHED_NAME] = { .type = NLA_NUL_STRING,
2804 .len = IP_VS_SCHEDNAME_MAXLEN },
0d1e71b0
SH		 2805 [IPVS_SVC_ATTR_PE_NAME] = { .type = NLA_NUL_STRING,
2806 .len = IP_VS_PENAME_MAXLEN },
9a812198
JV		 2807 [IPVS_SVC_ATTR_FLAGS] = { .type = NLA_BINARY,
2808 .len = sizeof(struct ip_vs_flags) },
2809 [IPVS_SVC_ATTR_TIMEOUT] = { .type = NLA_U32 },
2810 [IPVS_SVC_ATTR_NETMASK] = { .type = NLA_U32 },
2811 [IPVS_SVC_ATTR_STATS] = { .type = NLA_NESTED },
2812};
2813
2814/* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DEST */
2815static const struct nla_policy ip_vs_dest_policy[IPVS_DEST_ATTR_MAX + 1] = {
2816 [IPVS_DEST_ATTR_ADDR] = { .type = NLA_BINARY,
2817 .len = sizeof(union nf_inet_addr) },
2818 [IPVS_DEST_ATTR_PORT] = { .type = NLA_U16 },
2819 [IPVS_DEST_ATTR_FWD_METHOD] = { .type = NLA_U32 },
2820 [IPVS_DEST_ATTR_WEIGHT] = { .type = NLA_U32 },
2821 [IPVS_DEST_ATTR_U_THRESH] = { .type = NLA_U32 },
2822 [IPVS_DEST_ATTR_L_THRESH] = { .type = NLA_U32 },
2823 [IPVS_DEST_ATTR_ACTIVE_CONNS] = { .type = NLA_U32 },
2824 [IPVS_DEST_ATTR_INACT_CONNS] = { .type = NLA_U32 },
2825 [IPVS_DEST_ATTR_PERSIST_CONNS] = { .type = NLA_U32 },
2826 [IPVS_DEST_ATTR_STATS] = { .type = NLA_NESTED },
6cff339b 2827 [IPVS_DEST_ATTR_ADDR_FAMILY] = { .type = NLA_U16 },
9a812198
JV		 2828};
2829
2830static int ip_vs_genl_fill_stats(struct sk_buff *skb, int container_type,
cd67cd5e
JA		 2831 struct ip_vs_kstats *kstats)
2832{
2833 struct nlattr *nl_stats = nla_nest_start(skb, container_type);
2834
2835 if (!nl_stats)
2836 return -EMSGSIZE;
2837
2838 if (nla_put_u32(skb, IPVS_STATS_ATTR_CONNS, (u32)kstats->conns) ||
2839 nla_put_u32(skb, IPVS_STATS_ATTR_INPKTS, (u32)kstats->inpkts) ||
2840 nla_put_u32(skb, IPVS_STATS_ATTR_OUTPKTS, (u32)kstats->outpkts) ||
2841 nla_put_u64(skb, IPVS_STATS_ATTR_INBYTES, kstats->inbytes) ||
2842 nla_put_u64(skb, IPVS_STATS_ATTR_OUTBYTES, kstats->outbytes) ||
2843 nla_put_u32(skb, IPVS_STATS_ATTR_CPS, (u32)kstats->cps) ||
2844 nla_put_u32(skb, IPVS_STATS_ATTR_INPPS, (u32)kstats->inpps) ||
2845 nla_put_u32(skb, IPVS_STATS_ATTR_OUTPPS, (u32)kstats->outpps) ||
2846 nla_put_u32(skb, IPVS_STATS_ATTR_INBPS, (u32)kstats->inbps) ||
2847 nla_put_u32(skb, IPVS_STATS_ATTR_OUTBPS, (u32)kstats->outbps))
2848 goto nla_put_failure;
2849 nla_nest_end(skb, nl_stats);
2850
2851 return 0;
2852
2853nla_put_failure:
2854 nla_nest_cancel(skb, nl_stats);
2855 return -EMSGSIZE;
2856}
2857
2858static int ip_vs_genl_fill_stats64(struct sk_buff *skb, int container_type,
2859 struct ip_vs_kstats *kstats)
9a812198
JV		 2860{
2861 struct nlattr *nl_stats = nla_nest_start(skb, container_type);
cd67cd5e 2862
9a812198
JV		 2863 if (!nl_stats)
2864 return -EMSGSIZE;
2865
cd67cd5e
JA		 2866 if (nla_put_u64(skb, IPVS_STATS_ATTR_CONNS, kstats->conns) ||
2867 nla_put_u64(skb, IPVS_STATS_ATTR_INPKTS, kstats->inpkts) ||
2868 nla_put_u64(skb, IPVS_STATS_ATTR_OUTPKTS, kstats->outpkts) ||
2869 nla_put_u64(skb, IPVS_STATS_ATTR_INBYTES, kstats->inbytes) ||
2870 nla_put_u64(skb, IPVS_STATS_ATTR_OUTBYTES, kstats->outbytes) ||
2871 nla_put_u64(skb, IPVS_STATS_ATTR_CPS, kstats->cps) ||
2872 nla_put_u64(skb, IPVS_STATS_ATTR_INPPS, kstats->inpps) ||
2873 nla_put_u64(skb, IPVS_STATS_ATTR_OUTPPS, kstats->outpps) ||
2874 nla_put_u64(skb, IPVS_STATS_ATTR_INBPS, kstats->inbps) ||
2875 nla_put_u64(skb, IPVS_STATS_ATTR_OUTBPS, kstats->outbps))
969e8e25 2876 goto nla_put_failure;
9a812198
JV		 2877 nla_nest_end(skb, nl_stats);
2878
2879 return 0;
2880
2881nla_put_failure:
9a812198
JV		 2882 nla_nest_cancel(skb, nl_stats);
2883 return -EMSGSIZE;
2884}
2885
2886static int ip_vs_genl_fill_service(struct sk_buff *skb,
2887 struct ip_vs_service *svc)
2888{
ceec4c38 2889 struct ip_vs_scheduler *sched;
371990ee 2890 struct ip_vs_pe *pe;
9a812198
JV		 2891 struct nlattr *nl_service;
2892 struct ip_vs_flags flags = { .flags = svc->flags,
2893 .mask = ~0 };
cd67cd5e 2894 struct ip_vs_kstats kstats;
9a812198
JV		 2895
2896 nl_service = nla_nest_start(skb, IPVS_CMD_ATTR_SERVICE);
2897 if (!nl_service)
2898 return -EMSGSIZE;
2899
969e8e25
DM		 2900 if (nla_put_u16(skb, IPVS_SVC_ATTR_AF, svc->af))
2901 goto nla_put_failure;
9a812198 2902 if (svc->fwmark) {
969e8e25
DM		 2903 if (nla_put_u32(skb, IPVS_SVC_ATTR_FWMARK, svc->fwmark))
2904 goto nla_put_failure;
9a812198 2905 } else {
969e8e25
DM		 2906 if (nla_put_u16(skb, IPVS_SVC_ATTR_PROTOCOL, svc->protocol) ||
2907 nla_put(skb, IPVS_SVC_ATTR_ADDR, sizeof(svc->addr), &svc->addr) ||
0a925864 2908 nla_put_be16(skb, IPVS_SVC_ATTR_PORT, svc->port))
969e8e25 2909 goto nla_put_failure;
9a812198
JV		 2910 }
2911
ceec4c38 2912 sched = rcu_dereference_protected(svc->scheduler, 1);
371990ee 2913 pe = rcu_dereference_protected(svc->pe, 1);
ceec4c38 2914 if (nla_put_string(skb, IPVS_SVC_ATTR_SCHED_NAME, sched->name) ||
371990ee 2915 (pe && nla_put_string(skb, IPVS_SVC_ATTR_PE_NAME, pe->name)) ||
969e8e25
DM		 2916 nla_put(skb, IPVS_SVC_ATTR_FLAGS, sizeof(flags), &flags) ||
2917 nla_put_u32(skb, IPVS_SVC_ATTR_TIMEOUT, svc->timeout / HZ) ||
0a925864 2918 nla_put_be32(skb, IPVS_SVC_ATTR_NETMASK, svc->netmask))
969e8e25 2919 goto nla_put_failure;
cd67cd5e
JA		 2920 ip_vs_copy_stats(&kstats, &svc->stats);
2921 if (ip_vs_genl_fill_stats(skb, IPVS_SVC_ATTR_STATS, &kstats))
2922 goto nla_put_failure;
2923 if (ip_vs_genl_fill_stats64(skb, IPVS_SVC_ATTR_STATS64, &kstats))
9a812198
JV		 2924 goto nla_put_failure;
2925
2926 nla_nest_end(skb, nl_service);
2927
2928 return 0;
2929
2930nla_put_failure:
2931 nla_nest_cancel(skb, nl_service);
2932 return -EMSGSIZE;
2933}
2934
2935static int ip_vs_genl_dump_service(struct sk_buff *skb,
2936 struct ip_vs_service *svc,
2937 struct netlink_callback *cb)
2938{
2939 void *hdr;
2940
15e47304 2941 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
9a812198
JV		 2942 &ip_vs_genl_family, NLM_F_MULTI,
2943 IPVS_CMD_NEW_SERVICE);
2944 if (!hdr)
2945 return -EMSGSIZE;
2946
2947 if (ip_vs_genl_fill_service(skb, svc) < 0)
2948 goto nla_put_failure;
2949
053c095a
JB		 2950 genlmsg_end(skb, hdr);
2951 return 0;
9a812198
JV		 2952
2953nla_put_failure:
2954 genlmsg_cancel(skb, hdr);
2955 return -EMSGSIZE;
2956}
2957
2958static int ip_vs_genl_dump_services(struct sk_buff *skb,
2959 struct netlink_callback *cb)
2960{
2961 int idx = 0, i;
2962 int start = cb->args[0];
2963 struct ip_vs_service *svc;
fc723250 2964 struct net *net = skb_sknet(skb);
9a812198
JV		 2965
2966 mutex_lock(&__ip_vs_mutex);
2967 for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) {
ceec4c38 2968 hlist_for_each_entry(svc, &ip_vs_svc_table[i], s_list) {
fc723250 2969 if (++idx <= start || !net_eq(svc->net, net))
9a812198
JV		 2970 continue;
2971 if (ip_vs_genl_dump_service(skb, svc, cb) < 0) {
2972 idx--;
2973 goto nla_put_failure;
2974 }
2975 }
2976 }
2977
2978 for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) {
ceec4c38 2979 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[i], f_list) {
fc723250 2980 if (++idx <= start || !net_eq(svc->net, net))
9a812198
JV		 2981 continue;
2982 if (ip_vs_genl_dump_service(skb, svc, cb) < 0) {
2983 idx--;
2984 goto nla_put_failure;
2985 }
2986 }
2987 }
2988
2989nla_put_failure:
2990 mutex_unlock(&__ip_vs_mutex);
2991 cb->args[0] = idx;
2992
2993 return skb->len;
2994}
2995
fc723250
HS		 2996static int ip_vs_genl_parse_service(struct net *net,
2997 struct ip_vs_service_user_kern *usvc,
26c15cfd
JA		 2998 struct nlattr *nla, int full_entry,
2999 struct ip_vs_service **ret_svc)
9a812198
JV		 3000{
3001 struct nlattr *attrs[IPVS_SVC_ATTR_MAX + 1];
3002 struct nlattr *nla_af, *nla_port, *nla_fwmark, *nla_protocol, *nla_addr;
26c15cfd 3003 struct ip_vs_service *svc;
9a812198
JV		 3004
3005 /* Parse mandatory identifying service fields first */
3006 if (nla == NULL ||
3007 nla_parse_nested(attrs, IPVS_SVC_ATTR_MAX, nla, ip_vs_svc_policy))
3008 return -EINVAL;
3009
3010 nla_af = attrs[IPVS_SVC_ATTR_AF];
3011 nla_protocol = attrs[IPVS_SVC_ATTR_PROTOCOL];
3012 nla_addr = attrs[IPVS_SVC_ATTR_ADDR];
3013 nla_port = attrs[IPVS_SVC_ATTR_PORT];
3014 nla_fwmark = attrs[IPVS_SVC_ATTR_FWMARK];
3015
3016 if (!(nla_af && (nla_fwmark || (nla_port && nla_protocol && nla_addr))))
3017 return -EINVAL;
3018
258c8893
SH		 3019 memset(usvc, 0, sizeof(*usvc));
3020
c860c6b1 3021 usvc->af = nla_get_u16(nla_af);
f94fd041
JV		 3022#ifdef CONFIG_IP_VS_IPV6
3023 if (usvc->af != AF_INET && usvc->af != AF_INET6)
3024#else
3025 if (usvc->af != AF_INET)
3026#endif
9a812198
JV		 3027 return -EAFNOSUPPORT;
3028
3029 if (nla_fwmark) {
3030 usvc->protocol = IPPROTO_TCP;
3031 usvc->fwmark = nla_get_u32(nla_fwmark);
3032 } else {
3033 usvc->protocol = nla_get_u16(nla_protocol);
3034 nla_memcpy(&usvc->addr, nla_addr, sizeof(usvc->addr));
0a925864 3035 usvc->port = nla_get_be16(nla_port);
9a812198
JV		 3036 usvc->fwmark = 0;
3037 }
3038
ceec4c38 3039 rcu_read_lock();
26c15cfd 3040 if (usvc->fwmark)
fc723250 3041 svc = __ip_vs_svc_fwm_find(net, usvc->af, usvc->fwmark);
26c15cfd 3042 else
fc723250 3043 svc = __ip_vs_service_find(net, usvc->af, usvc->protocol,
26c15cfd 3044 &usvc->addr, usvc->port);
ceec4c38 3045 rcu_read_unlock();
26c15cfd
JA		 3046 *ret_svc = svc;
3047
9a812198
JV		 3048 /* If a full entry was requested, check for the additional fields */
3049 if (full_entry) {
0d1e71b0 3050 struct nlattr *nla_sched, *nla_flags, *nla_pe, *nla_timeout,
9a812198
JV		 3051 *nla_netmask;
3052 struct ip_vs_flags flags;
9a812198
JV		 3053
3054 nla_sched = attrs[IPVS_SVC_ATTR_SCHED_NAME];
0d1e71b0 3055 nla_pe = attrs[IPVS_SVC_ATTR_PE_NAME];
9a812198
JV		 3056 nla_flags = attrs[IPVS_SVC_ATTR_FLAGS];
3057 nla_timeout = attrs[IPVS_SVC_ATTR_TIMEOUT];
3058 nla_netmask = attrs[IPVS_SVC_ATTR_NETMASK];
3059
3060 if (!(nla_sched && nla_flags && nla_timeout && nla_netmask))
3061 return -EINVAL;
3062
3063 nla_memcpy(&flags, nla_flags, sizeof(flags));
3064
3065 /* prefill flags from service if it already exists */
26c15cfd 3066 if (svc)
9a812198 3067 usvc->flags = svc->flags;
9a812198
JV		 3068
3069 /* set new flags from userland */
3070 usvc->flags = (usvc->flags & ~flags.mask) |
3071 (flags.flags & flags.mask);
c860c6b1 3072 usvc->sched_name = nla_data(nla_sched);
0d1e71b0 3073 usvc->pe_name = nla_pe ? nla_data(nla_pe) : NULL;
9a812198 3074 usvc->timeout = nla_get_u32(nla_timeout);
0a925864 3075 usvc->netmask = nla_get_be32(nla_netmask);
9a812198
JV		 3076 }
3077
3078 return 0;
3079}
3080
fc723250
HS		 3081static struct ip_vs_service *ip_vs_genl_find_service(struct net *net,
3082 struct nlattr *nla)
9a812198 3083{
c860c6b1 3084 struct ip_vs_service_user_kern usvc;
26c15cfd 3085 struct ip_vs_service *svc;
9a812198
JV		 3086 int ret;
3087
fc723250 3088 ret = ip_vs_genl_parse_service(net, &usvc, nla, 0, &svc);
26c15cfd 3089 return ret ? ERR_PTR(ret) : svc;
9a812198
JV		 3090}
3091
3092static int ip_vs_genl_fill_dest(struct sk_buff *skb, struct ip_vs_dest *dest)
3093{
3094 struct nlattr *nl_dest;
cd67cd5e 3095 struct ip_vs_kstats kstats;
9a812198
JV		 3096
3097 nl_dest = nla_nest_start(skb, IPVS_CMD_ATTR_DEST);
3098 if (!nl_dest)
3099 return -EMSGSIZE;
3100
969e8e25 3101 if (nla_put(skb, IPVS_DEST_ATTR_ADDR, sizeof(dest->addr), &dest->addr) ||
0a925864 3102 nla_put_be16(skb, IPVS_DEST_ATTR_PORT, dest->port) ||
969e8e25
DM		 3103 nla_put_u32(skb, IPVS_DEST_ATTR_FWD_METHOD,
3104 (atomic_read(&dest->conn_flags) &
3105 IP_VS_CONN_F_FWD_MASK)) ||
3106 nla_put_u32(skb, IPVS_DEST_ATTR_WEIGHT,
3107 atomic_read(&dest->weight)) ||
3108 nla_put_u32(skb, IPVS_DEST_ATTR_U_THRESH, dest->u_threshold) ||
3109 nla_put_u32(skb, IPVS_DEST_ATTR_L_THRESH, dest->l_threshold) ||
3110 nla_put_u32(skb, IPVS_DEST_ATTR_ACTIVE_CONNS,
3111 atomic_read(&dest->activeconns)) ||
3112 nla_put_u32(skb, IPVS_DEST_ATTR_INACT_CONNS,
3113 atomic_read(&dest->inactconns)) ||
3114 nla_put_u32(skb, IPVS_DEST_ATTR_PERSIST_CONNS,
6cff339b
AG		 3115 atomic_read(&dest->persistconns)) ||
3116 nla_put_u16(skb, IPVS_DEST_ATTR_ADDR_FAMILY, dest->af))
969e8e25 3117 goto nla_put_failure;
cd67cd5e
JA		 3118 ip_vs_copy_stats(&kstats, &dest->stats);
3119 if (ip_vs_genl_fill_stats(skb, IPVS_DEST_ATTR_STATS, &kstats))
3120 goto nla_put_failure;
3121 if (ip_vs_genl_fill_stats64(skb, IPVS_DEST_ATTR_STATS64, &kstats))
9a812198
JV		 3122 goto nla_put_failure;
3123
3124 nla_nest_end(skb, nl_dest);
3125
3126 return 0;
3127
3128nla_put_failure:
3129 nla_nest_cancel(skb, nl_dest);
3130 return -EMSGSIZE;
3131}
3132
3133static int ip_vs_genl_dump_dest(struct sk_buff *skb, struct ip_vs_dest *dest,
3134 struct netlink_callback *cb)
3135{
3136 void *hdr;
3137
15e47304 3138 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
9a812198
JV		 3139 &ip_vs_genl_family, NLM_F_MULTI,
3140 IPVS_CMD_NEW_DEST);
3141 if (!hdr)
3142 return -EMSGSIZE;
3143
3144 if (ip_vs_genl_fill_dest(skb, dest) < 0)
3145 goto nla_put_failure;
3146
053c095a
JB		 3147 genlmsg_end(skb, hdr);
3148 return 0;
9a812198
JV		 3149
3150nla_put_failure:
3151 genlmsg_cancel(skb, hdr);
3152 return -EMSGSIZE;
3153}
3154
3155static int ip_vs_genl_dump_dests(struct sk_buff *skb,
3156 struct netlink_callback *cb)
3157{
3158 int idx = 0;
3159 int start = cb->args[0];
3160 struct ip_vs_service *svc;
3161 struct ip_vs_dest *dest;
3162 struct nlattr *attrs[IPVS_CMD_ATTR_MAX + 1];
a0840e2e 3163 struct net *net = skb_sknet(skb);
9a812198
JV		 3164
3165 mutex_lock(&__ip_vs_mutex);
3166
3167 /* Try to find the service for which to dump destinations */
3168 if (nlmsg_parse(cb->nlh, GENL_HDRLEN, attrs,
3169 IPVS_CMD_ATTR_MAX, ip_vs_cmd_policy))
3170 goto out_err;
3171
a0840e2e 3172
fc723250 3173 svc = ip_vs_genl_find_service(net, attrs[IPVS_CMD_ATTR_SERVICE]);
9a812198
JV		 3174 if (IS_ERR(svc) || svc == NULL)
3175 goto out_err;
3176
3177 /* Dump the destinations */
3178 list_for_each_entry(dest, &svc->destinations, n_list) {
3179 if (++idx <= start)
3180 continue;
3181 if (ip_vs_genl_dump_dest(skb, dest, cb) < 0) {
3182 idx--;
3183 goto nla_put_failure;
3184 }
3185 }
3186
3187nla_put_failure:
3188 cb->args[0] = idx;
9a812198
JV		 3189
3190out_err:
3191 mutex_unlock(&__ip_vs_mutex);
3192
3193 return skb->len;
3194}
3195
c860c6b1 3196static int ip_vs_genl_parse_dest(struct ip_vs_dest_user_kern *udest,
9a812198
JV		 3197 struct nlattr *nla, int full_entry)
3198{
3199 struct nlattr *attrs[IPVS_DEST_ATTR_MAX + 1];
3200 struct nlattr *nla_addr, *nla_port;
6cff339b 3201 struct nlattr *nla_addr_family;
9a812198
JV		 3202
3203 /* Parse mandatory identifying destination fields first */
3204 if (nla == NULL ||
3205 nla_parse_nested(attrs, IPVS_DEST_ATTR_MAX, nla, ip_vs_dest_policy))
3206 return -EINVAL;
3207
3208 nla_addr = attrs[IPVS_DEST_ATTR_ADDR];
3209 nla_port = attrs[IPVS_DEST_ATTR_PORT];
6cff339b 3210 nla_addr_family = attrs[IPVS_DEST_ATTR_ADDR_FAMILY];
9a812198
JV		 3211
3212 if (!(nla_addr && nla_port))
3213 return -EINVAL;
3214
258c8893
SH		 3215 memset(udest, 0, sizeof(*udest));
3216
9a812198 3217 nla_memcpy(&udest->addr, nla_addr, sizeof(udest->addr));
0a925864 3218 udest->port = nla_get_be16(nla_port);
9a812198 3219
6cff339b
AG		 3220 if (nla_addr_family)
3221 udest->af = nla_get_u16(nla_addr_family);
3222 else
3223 udest->af = 0;
3224
9a812198
JV		 3225 /* If a full entry was requested, check for the additional fields */
3226 if (full_entry) {
3227 struct nlattr *nla_fwd, *nla_weight, *nla_u_thresh,
3228 *nla_l_thresh;
3229
3230 nla_fwd = attrs[IPVS_DEST_ATTR_FWD_METHOD];
3231 nla_weight = attrs[IPVS_DEST_ATTR_WEIGHT];
3232 nla_u_thresh = attrs[IPVS_DEST_ATTR_U_THRESH];
3233 nla_l_thresh = attrs[IPVS_DEST_ATTR_L_THRESH];
3234
3235 if (!(nla_fwd && nla_weight && nla_u_thresh && nla_l_thresh))
3236 return -EINVAL;
3237
3238 udest->conn_flags = nla_get_u32(nla_fwd)
3239 & IP_VS_CONN_F_FWD_MASK;
3240 udest->weight = nla_get_u32(nla_weight);
3241 udest->u_threshold = nla_get_u32(nla_u_thresh);
3242 udest->l_threshold = nla_get_u32(nla_l_thresh);
3243 }
3244
3245 return 0;
3246}
3247
0a925864
JA		 3248static int ip_vs_genl_fill_daemon(struct sk_buff *skb, __u32 state,
3249 const char *mcast_ifn, __u32 syncid)
9a812198
JV		 3250{
3251 struct nlattr *nl_daemon;
3252
3253 nl_daemon = nla_nest_start(skb, IPVS_CMD_ATTR_DAEMON);
3254 if (!nl_daemon)
3255 return -EMSGSIZE;
3256
969e8e25
DM		 3257 if (nla_put_u32(skb, IPVS_DAEMON_ATTR_STATE, state) ||
3258 nla_put_string(skb, IPVS_DAEMON_ATTR_MCAST_IFN, mcast_ifn) ||
3259 nla_put_u32(skb, IPVS_DAEMON_ATTR_SYNC_ID, syncid))
3260 goto nla_put_failure;
9a812198
JV		 3261 nla_nest_end(skb, nl_daemon);
3262
3263 return 0;
3264
3265nla_put_failure:
3266 nla_nest_cancel(skb, nl_daemon);
3267 return -EMSGSIZE;
3268}
3269
0a925864
JA		 3270static int ip_vs_genl_dump_daemon(struct sk_buff *skb, __u32 state,
3271 const char *mcast_ifn, __u32 syncid,
9a812198
JV		 3272 struct netlink_callback *cb)
3273{
3274 void *hdr;
15e47304 3275 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
9a812198
JV		 3276 &ip_vs_genl_family, NLM_F_MULTI,
3277 IPVS_CMD_NEW_DAEMON);
3278 if (!hdr)
3279 return -EMSGSIZE;
3280
3281 if (ip_vs_genl_fill_daemon(skb, state, mcast_ifn, syncid))
3282 goto nla_put_failure;
3283
053c095a
JB		 3284 genlmsg_end(skb, hdr);
3285 return 0;
9a812198
JV		 3286
3287nla_put_failure:
3288 genlmsg_cancel(skb, hdr);
3289 return -EMSGSIZE;
3290}
3291
3292static int ip_vs_genl_dump_daemons(struct sk_buff *skb,
3293 struct netlink_callback *cb)
3294{
a09d1977 3295 struct net *net = skb_sknet(skb);
f131315f
HS		 3296 struct netns_ipvs *ipvs = net_ipvs(net);
3297
ae1d48b2 3298 mutex_lock(&ipvs->sync_mutex);
f131315f 3299 if ((ipvs->sync_state & IP_VS_STATE_MASTER) && !cb->args[0]) {
9a812198 3300 if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_MASTER,
f131315f
HS		 3301 ipvs->master_mcast_ifn,
3302 ipvs->master_syncid, cb) < 0)
9a812198
JV		 3303 goto nla_put_failure;
3304
3305 cb->args[0] = 1;
3306 }
3307
f131315f 3308 if ((ipvs->sync_state & IP_VS_STATE_BACKUP) && !cb->args[1]) {
9a812198 3309 if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_BACKUP,
f131315f
HS		 3310 ipvs->backup_mcast_ifn,
3311 ipvs->backup_syncid, cb) < 0)
9a812198
JV		 3312 goto nla_put_failure;
3313
3314 cb->args[1] = 1;
3315 }
3316
3317nla_put_failure:
ae1d48b2 3318 mutex_unlock(&ipvs->sync_mutex);
9a812198
JV		 3319
3320 return skb->len;
3321}
3322
f131315f 3323static int ip_vs_genl_new_daemon(struct net *net, struct nlattr **attrs)
9a812198
JV		 3324{
3325 if (!(attrs[IPVS_DAEMON_ATTR_STATE] &&
3326 attrs[IPVS_DAEMON_ATTR_MCAST_IFN] &&
3327 attrs[IPVS_DAEMON_ATTR_SYNC_ID]))
3328 return -EINVAL;
3329
391f503d
AG		 3330 /* The synchronization protocol is incompatible with mixed family
3331 * services
3332 */
3333 if (net_ipvs(net)->mixed_address_family_dests > 0)
3334 return -EINVAL;
3335
f131315f
HS		 3336 return start_sync_thread(net,
3337 nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]),
9a812198
JV		 3338 nla_data(attrs[IPVS_DAEMON_ATTR_MCAST_IFN]),
3339 nla_get_u32(attrs[IPVS_DAEMON_ATTR_SYNC_ID]));
3340}
3341
f131315f 3342static int ip_vs_genl_del_daemon(struct net *net, struct nlattr **attrs)
9a812198
JV		 3343{
3344 if (!attrs[IPVS_DAEMON_ATTR_STATE])
3345 return -EINVAL;
3346
f131315f
HS		 3347 return stop_sync_thread(net,
3348 nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]));
9a812198
JV		 3349}
3350
9330419d 3351static int ip_vs_genl_set_config(struct net *net, struct nlattr **attrs)
9a812198
JV		 3352{
3353 struct ip_vs_timeout_user t;
3354
9330419d 3355 __ip_vs_get_timeouts(net, &t);
9a812198
JV		 3356
3357 if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP])
3358 t.tcp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP]);
3359
3360 if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN])
3361 t.tcp_fin_timeout =
3362 nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN]);
3363
3364 if (attrs[IPVS_CMD_ATTR_TIMEOUT_UDP])
3365 t.udp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_UDP]);
3366
9330419d 3367 return ip_vs_set_timeout(net, &t);
9a812198
JV		 3368}
3369
ae1d48b2 3370static int ip_vs_genl_set_daemon(struct sk_buff *skb, struct genl_info *info)
9a812198 3371{
9a812198 3372 int ret = 0, cmd;
fc723250 3373 struct net *net;
a0840e2e 3374 struct netns_ipvs *ipvs;
9a812198 3375
fc723250 3376 net = skb_sknet(skb);
a0840e2e 3377 ipvs = net_ipvs(net);
9a812198
JV		 3378 cmd = info->genlhdr->cmd;
3379
ae1d48b2 3380 if (cmd == IPVS_CMD_NEW_DAEMON || cmd == IPVS_CMD_DEL_DAEMON) {
9a812198
JV		 3381 struct nlattr *daemon_attrs[IPVS_DAEMON_ATTR_MAX + 1];
3382
ae1d48b2 3383 mutex_lock(&ipvs->sync_mutex);
9a812198
JV		 3384 if (!info->attrs[IPVS_CMD_ATTR_DAEMON] ||
3385 nla_parse_nested(daemon_attrs, IPVS_DAEMON_ATTR_MAX,
3386 info->attrs[IPVS_CMD_ATTR_DAEMON],
3387 ip_vs_daemon_policy)) {
3388 ret = -EINVAL;
3389 goto out;
3390 }
3391
3392 if (cmd == IPVS_CMD_NEW_DAEMON)
f131315f 3393 ret = ip_vs_genl_new_daemon(net, daemon_attrs);
9a812198 3394 else
f131315f 3395 ret = ip_vs_genl_del_daemon(net, daemon_attrs);
ae1d48b2
HS		 3396out:
3397 mutex_unlock(&ipvs->sync_mutex);
3398 }
3399 return ret;
3400}
3401
3402static int ip_vs_genl_set_cmd(struct sk_buff *skb, struct genl_info *info)
3403{
3404 struct ip_vs_service *svc = NULL;
3405 struct ip_vs_service_user_kern usvc;
3406 struct ip_vs_dest_user_kern udest;
3407 int ret = 0, cmd;
3408 int need_full_svc = 0, need_full_dest = 0;
3409 struct net *net;
ae1d48b2
HS		 3410
3411 net = skb_sknet(skb);
ae1d48b2
HS		 3412 cmd = info->genlhdr->cmd;
3413
3414 mutex_lock(&__ip_vs_mutex);
3415
3416 if (cmd == IPVS_CMD_FLUSH) {
578bc3ef 3417 ret = ip_vs_flush(net, false);
ae1d48b2
HS		 3418 goto out;
3419 } else if (cmd == IPVS_CMD_SET_CONFIG) {
3420 ret = ip_vs_genl_set_config(net, info->attrs);
9a812198
JV		 3421 goto out;
3422 } else if (cmd == IPVS_CMD_ZERO &&
3423 !info->attrs[IPVS_CMD_ATTR_SERVICE]) {
fc723250 3424 ret = ip_vs_zero_all(net);
9a812198
JV		 3425 goto out;
3426 }
3427
3428 /* All following commands require a service argument, so check if we
3429 * received a valid one. We need a full service specification when
3430 * adding / editing a service. Only identifying members otherwise. */
3431 if (cmd == IPVS_CMD_NEW_SERVICE || cmd == IPVS_CMD_SET_SERVICE)
3432 need_full_svc = 1;
3433
fc723250 3434 ret = ip_vs_genl_parse_service(net, &usvc,
9a812198 3435 info->attrs[IPVS_CMD_ATTR_SERVICE],
26c15cfd 3436 need_full_svc, &svc);
9a812198
JV		 3437 if (ret)
3438 goto out;
3439
9a812198
JV		 3440 /* Unless we're adding a new service, the service must already exist */
3441 if ((cmd != IPVS_CMD_NEW_SERVICE) && (svc == NULL)) {
3442 ret = -ESRCH;
3443 goto out;
3444 }
3445
3446 /* Destination commands require a valid destination argument. For
3447 * adding / editing a destination, we need a full destination
3448 * specification. */
3449 if (cmd == IPVS_CMD_NEW_DEST || cmd == IPVS_CMD_SET_DEST ||
3450 cmd == IPVS_CMD_DEL_DEST) {
3451 if (cmd != IPVS_CMD_DEL_DEST)
3452 need_full_dest = 1;
3453
3454 ret = ip_vs_genl_parse_dest(&udest,
3455 info->attrs[IPVS_CMD_ATTR_DEST],
3456 need_full_dest);
3457 if (ret)
3458 goto out;
6cff339b
AG		 3459
3460 /* Old protocols did not allow the user to specify address
3461 * family, so we set it to zero instead. We also didn't
3462 * allow heterogeneous pools in the old code, so it's safe
3463 * to assume that this will have the same address family as
3464 * the service.
3465 */
3466 if (udest.af == 0)
3467 udest.af = svc->af;
bc18d37f 3468
dd3733b3 3469 if (udest.af != svc->af && cmd != IPVS_CMD_DEL_DEST) {
bc18d37f
AG		 3470 /* The synchronization protocol is incompatible
3471 * with mixed family services
3472 */
3473 if (net_ipvs(net)->sync_state) {
3474 ret = -EINVAL;
3475 goto out;
3476 }
3477
3478 /* Which connection types do we support? */
3479 switch (udest.conn_flags) {
3480 case IP_VS_CONN_F_TUNNEL:
3481 /* We are able to forward this */
3482 break;
3483 default:
3484 ret = -EINVAL;
3485 goto out;
3486 }
3487 }
9a812198
JV		 3488 }
3489
3490 switch (cmd) {
3491 case IPVS_CMD_NEW_SERVICE:
3492 if (svc == NULL)
fc723250 3493 ret = ip_vs_add_service(net, &usvc, &svc);
9a812198
JV		 3494 else
3495 ret = -EEXIST;
3496 break;
3497 case IPVS_CMD_SET_SERVICE:
3498 ret = ip_vs_edit_service(svc, &usvc);
3499 break;
3500 case IPVS_CMD_DEL_SERVICE:
3501 ret = ip_vs_del_service(svc);
26c15cfd 3502 /* do not use svc, it can be freed */
9a812198
JV		 3503 break;
3504 case IPVS_CMD_NEW_DEST:
3505 ret = ip_vs_add_dest(svc, &udest);
3506 break;
3507 case IPVS_CMD_SET_DEST:
3508 ret = ip_vs_edit_dest(svc, &udest);
3509 break;
3510 case IPVS_CMD_DEL_DEST:
3511 ret = ip_vs_del_dest(svc, &udest);
3512 break;
3513 case IPVS_CMD_ZERO:
3514 ret = ip_vs_zero_service(svc);
3515 break;
3516 default:
3517 ret = -EINVAL;
3518 }
3519
3520out:
9a812198
JV		 3521 mutex_unlock(&__ip_vs_mutex);
3522
3523 return ret;
3524}
3525
3526static int ip_vs_genl_get_cmd(struct sk_buff *skb, struct genl_info *info)
3527{
3528 struct sk_buff *msg;
3529 void *reply;
3530 int ret, cmd, reply_cmd;
fc723250 3531 struct net *net;
9a812198 3532
fc723250 3533 net = skb_sknet(skb);
9a812198
JV		 3534 cmd = info->genlhdr->cmd;
3535
3536 if (cmd == IPVS_CMD_GET_SERVICE)
3537 reply_cmd = IPVS_CMD_NEW_SERVICE;
3538 else if (cmd == IPVS_CMD_GET_INFO)
3539 reply_cmd = IPVS_CMD_SET_INFO;
3540 else if (cmd == IPVS_CMD_GET_CONFIG)
3541 reply_cmd = IPVS_CMD_SET_CONFIG;
3542 else {
1e3e238e 3543 pr_err("unknown Generic Netlink command\n");
9a812198
JV		 3544 return -EINVAL;
3545 }
3546
3547 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3548 if (!msg)
3549 return -ENOMEM;
3550
3551 mutex_lock(&__ip_vs_mutex);
3552
3553 reply = genlmsg_put_reply(msg, info, &ip_vs_genl_family, 0, reply_cmd);
3554 if (reply == NULL)
3555 goto nla_put_failure;
3556
3557 switch (cmd) {
3558 case IPVS_CMD_GET_SERVICE:
3559 {
3560 struct ip_vs_service *svc;
3561
fc723250
HS		 3562 svc = ip_vs_genl_find_service(net,
3563 info->attrs[IPVS_CMD_ATTR_SERVICE]);
9a812198
JV		 3564 if (IS_ERR(svc)) {
3565 ret = PTR_ERR(svc);
3566 goto out_err;
3567 } else if (svc) {
3568 ret = ip_vs_genl_fill_service(msg, svc);
9a812198
JV		 3569 if (ret)
3570 goto nla_put_failure;
3571 } else {
3572 ret = -ESRCH;
3573 goto out_err;
3574 }
3575
3576 break;
3577 }
3578
3579 case IPVS_CMD_GET_CONFIG:
3580 {
3581 struct ip_vs_timeout_user t;
3582
9330419d 3583 __ip_vs_get_timeouts(net, &t);
9a812198 3584#ifdef CONFIG_IP_VS_PROTO_TCP
969e8e25
DM		 3585 if (nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP,
3586 t.tcp_timeout) ||
3587 nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP_FIN,
3588 t.tcp_fin_timeout))
3589 goto nla_put_failure;
9a812198
JV		 3590#endif
3591#ifdef CONFIG_IP_VS_PROTO_UDP
969e8e25
DM		 3592 if (nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_UDP, t.udp_timeout))
3593 goto nla_put_failure;
9a812198
JV		 3594#endif
3595
3596 break;
3597 }
3598
3599 case IPVS_CMD_GET_INFO:
969e8e25
DM		 3600 if (nla_put_u32(msg, IPVS_INFO_ATTR_VERSION,
3601 IP_VS_VERSION_CODE) ||
3602 nla_put_u32(msg, IPVS_INFO_ATTR_CONN_TAB_SIZE,
3603 ip_vs_conn_tab_size))
3604 goto nla_put_failure;
9a812198
JV		 3605 break;
3606 }
3607
3608 genlmsg_end(msg, reply);
134e6375 3609 ret = genlmsg_reply(msg, info);
9a812198
JV		 3610 goto out;
3611
3612nla_put_failure:
1e3e238e 3613 pr_err("not enough space in Netlink message\n");
9a812198
JV		 3614 ret = -EMSGSIZE;
3615
3616out_err:
3617 nlmsg_free(msg);
3618out:
3619 mutex_unlock(&__ip_vs_mutex);
3620
3621 return ret;
3622}
3623
3624
c61b0c13 3625static const struct genl_ops ip_vs_genl_ops[] = {
9a812198
JV		 3626 {
3627 .cmd = IPVS_CMD_NEW_SERVICE,
3628 .flags = GENL_ADMIN_PERM,
3629 .policy = ip_vs_cmd_policy,
3630 .doit = ip_vs_genl_set_cmd,
3631 },
3632 {
3633 .cmd = IPVS_CMD_SET_SERVICE,
3634 .flags = GENL_ADMIN_PERM,
3635 .policy = ip_vs_cmd_policy,
3636 .doit = ip_vs_genl_set_cmd,
3637 },
3638 {
3639 .cmd = IPVS_CMD_DEL_SERVICE,
3640 .flags = GENL_ADMIN_PERM,
3641 .policy = ip_vs_cmd_policy,
3642 .doit = ip_vs_genl_set_cmd,
3643 },
3644 {
3645 .cmd = IPVS_CMD_GET_SERVICE,
3646 .flags = GENL_ADMIN_PERM,
3647 .doit = ip_vs_genl_get_cmd,
3648 .dumpit = ip_vs_genl_dump_services,
3649 .policy = ip_vs_cmd_policy,
3650 },
3651 {
3652 .cmd = IPVS_CMD_NEW_DEST,
3653 .flags = GENL_ADMIN_PERM,
3654 .policy = ip_vs_cmd_policy,
3655 .doit = ip_vs_genl_set_cmd,
3656 },
3657 {
3658 .cmd = IPVS_CMD_SET_DEST,
3659 .flags = GENL_ADMIN_PERM,
3660 .policy = ip_vs_cmd_policy,
3661 .doit = ip_vs_genl_set_cmd,
3662 },
3663 {
3664 .cmd = IPVS_CMD_DEL_DEST,
3665 .flags = GENL_ADMIN_PERM,
3666 .policy = ip_vs_cmd_policy,
3667 .doit = ip_vs_genl_set_cmd,
3668 },
3669 {
3670 .cmd = IPVS_CMD_GET_DEST,
3671 .flags = GENL_ADMIN_PERM,
3672 .policy = ip_vs_cmd_policy,
3673 .dumpit = ip_vs_genl_dump_dests,
3674 },
3675 {
3676 .cmd = IPVS_CMD_NEW_DAEMON,
3677 .flags = GENL_ADMIN_PERM,
3678 .policy = ip_vs_cmd_policy,
ae1d48b2 3679 .doit = ip_vs_genl_set_daemon,
9a812198
JV		 3680 },
3681 {
3682 .cmd = IPVS_CMD_DEL_DAEMON,
3683 .flags = GENL_ADMIN_PERM,
3684 .policy = ip_vs_cmd_policy,
ae1d48b2 3685 .doit = ip_vs_genl_set_daemon,
9a812198
JV		 3686 },
3687 {
3688 .cmd = IPVS_CMD_GET_DAEMON,
3689 .flags = GENL_ADMIN_PERM,
3690 .dumpit = ip_vs_genl_dump_daemons,
3691 },
3692 {
3693 .cmd = IPVS_CMD_SET_CONFIG,
3694 .flags = GENL_ADMIN_PERM,
3695 .policy = ip_vs_cmd_policy,
3696 .doit = ip_vs_genl_set_cmd,
3697 },
3698 {
3699 .cmd = IPVS_CMD_GET_CONFIG,
3700 .flags = GENL_ADMIN_PERM,
3701 .doit = ip_vs_genl_get_cmd,
3702 },
3703 {
3704 .cmd = IPVS_CMD_GET_INFO,
3705 .flags = GENL_ADMIN_PERM,
3706 .doit = ip_vs_genl_get_cmd,
3707 },
3708 {
3709 .cmd = IPVS_CMD_ZERO,
3710 .flags = GENL_ADMIN_PERM,
3711 .policy = ip_vs_cmd_policy,
3712 .doit = ip_vs_genl_set_cmd,
3713 },
3714 {
3715 .cmd = IPVS_CMD_FLUSH,
3716 .flags = GENL_ADMIN_PERM,
3717 .doit = ip_vs_genl_set_cmd,
3718 },
3719};
3720
3721static int __init ip_vs_genl_register(void)
3722{
8f698d54 3723 return genl_register_family_with_ops(&ip_vs_genl_family,
c53ed742 3724 ip_vs_genl_ops);
9a812198
JV		 3725}
3726
3727static void ip_vs_genl_unregister(void)
3728{
3729 genl_unregister_family(&ip_vs_genl_family);
3730}
3731
3732/* End of Generic Netlink interface definitions */
3733
61b1ab45
HS		 3734/*
3735 * per netns intit/exit func.
3736 */
14e40546 3737#ifdef CONFIG_SYSCTL
2b2d2808 3738static int __net_init ip_vs_control_net_init_sysctl(struct net *net)
61b1ab45 3739{
fc723250
HS		 3740 int idx;
3741 struct netns_ipvs *ipvs = net_ipvs(net);
a0840e2e 3742 struct ctl_table *tbl;
fc723250 3743
a0840e2e
HS		 3744 atomic_set(&ipvs->dropentry, 0);
3745 spin_lock_init(&ipvs->dropentry_lock);
3746 spin_lock_init(&ipvs->droppacket_lock);
3747 spin_lock_init(&ipvs->securetcp_lock);
a0840e2e
HS		 3748
3749 if (!net_eq(net, &init_net)) {
3750 tbl = kmemdup(vs_vars, sizeof(vs_vars), GFP_KERNEL);
3751 if (tbl == NULL)
14e40546 3752 return -ENOMEM;
464dc801
EB		 3753
3754 /* Don't export sysctls to unprivileged users */
3755 if (net->user_ns != &init_user_ns)
3756 tbl[0].procname = NULL;
a0840e2e
HS		 3757 } else
3758 tbl = vs_vars;
3759 /* Initialize sysctl defaults */
3760 idx = 0;
3761 ipvs->sysctl_amemthresh = 1024;
3762 tbl[idx++].data = &ipvs->sysctl_amemthresh;
3763 ipvs->sysctl_am_droprate = 10;
3764 tbl[idx++].data = &ipvs->sysctl_am_droprate;
3765 tbl[idx++].data = &ipvs->sysctl_drop_entry;
3766 tbl[idx++].data = &ipvs->sysctl_drop_packet;
3767#ifdef CONFIG_IP_VS_NFCT
3768 tbl[idx++].data = &ipvs->sysctl_conntrack;
3769#endif
3770 tbl[idx++].data = &ipvs->sysctl_secure_tcp;
3771 ipvs->sysctl_snat_reroute = 1;
3772 tbl[idx++].data = &ipvs->sysctl_snat_reroute;
3773 ipvs->sysctl_sync_ver = 1;
3774 tbl[idx++].data = &ipvs->sysctl_sync_ver;
f73181c8
PNA		 3775 ipvs->sysctl_sync_ports = 1;
3776 tbl[idx++].data = &ipvs->sysctl_sync_ports;
4d0c875d 3777 tbl[idx++].data = &ipvs->sysctl_sync_persist_mode;
1c003b15
PNA		 3778 ipvs->sysctl_sync_qlen_max = nr_free_buffer_pages() / 32;
3779 tbl[idx++].data = &ipvs->sysctl_sync_qlen_max;
3780 ipvs->sysctl_sync_sock_size = 0;
3781 tbl[idx++].data = &ipvs->sysctl_sync_sock_size;
a0840e2e
HS		 3782 tbl[idx++].data = &ipvs->sysctl_cache_bypass;
3783 tbl[idx++].data = &ipvs->sysctl_expire_nodest_conn;
c6c96c18
AF		 3784 tbl[idx++].data = &ipvs->sysctl_sloppy_tcp;
3785 tbl[idx++].data = &ipvs->sysctl_sloppy_sctp;
a0840e2e 3786 tbl[idx++].data = &ipvs->sysctl_expire_quiescent_template;
59e0350e
SH		 3787 ipvs->sysctl_sync_threshold[0] = DEFAULT_SYNC_THRESHOLD;
3788 ipvs->sysctl_sync_threshold[1] = DEFAULT_SYNC_PERIOD;
a0840e2e
HS		 3789 tbl[idx].data = &ipvs->sysctl_sync_threshold;
3790 tbl[idx++].maxlen = sizeof(ipvs->sysctl_sync_threshold);
749c42b6
JA		 3791 ipvs->sysctl_sync_refresh_period = DEFAULT_SYNC_REFRESH_PERIOD;
3792 tbl[idx++].data = &ipvs->sysctl_sync_refresh_period;
3793 ipvs->sysctl_sync_retries = clamp_t(int, DEFAULT_SYNC_RETRIES, 0, 3);
3794 tbl[idx++].data = &ipvs->sysctl_sync_retries;
a0840e2e 3795 tbl[idx++].data = &ipvs->sysctl_nat_icmp_send;
3654e611
JA		 3796 ipvs->sysctl_pmtu_disc = 1;
3797 tbl[idx++].data = &ipvs->sysctl_pmtu_disc;
0c12582f 3798 tbl[idx++].data = &ipvs->sysctl_backup_only;
d752c364
MRL		 3799 ipvs->sysctl_conn_reuse_mode = 1;
3800 tbl[idx++].data = &ipvs->sysctl_conn_reuse_mode;
a0840e2e
HS		 3801
3802
ec8f23ce 3803 ipvs->sysctl_hdr = register_net_sysctl(net, "net/ipv4/vs", tbl);
0443929f
SH		 3804 if (ipvs->sysctl_hdr == NULL) {
3805 if (!net_eq(net, &init_net))
3806 kfree(tbl);
14e40546 3807 return -ENOMEM;
0443929f 3808 }
6ef757f9 3809 ip_vs_start_estimator(net, &ipvs->tot_stats);
a0840e2e 3810 ipvs->sysctl_tbl = tbl;
f6340ee0
HS		 3811 /* Schedule defense work */
3812 INIT_DELAYED_WORK(&ipvs->defense_work, defense_work_handler);
3813 schedule_delayed_work(&ipvs->defense_work, DEFENSE_TIMER_PERIOD);
61b1ab45 3814
61b1ab45 3815 return 0;
61b1ab45
HS		 3816}
3817
2b2d2808 3818static void __net_exit ip_vs_control_net_cleanup_sysctl(struct net *net)
61b1ab45 3819{
b17fc996
HS		 3820 struct netns_ipvs *ipvs = net_ipvs(net);
3821
f2431e6e
HS		 3822 cancel_delayed_work_sync(&ipvs->defense_work);
3823 cancel_work_sync(&ipvs->defense_work.work);
a0840e2e 3824 unregister_net_sysctl_table(ipvs->sysctl_hdr);
9802d21e 3825 ip_vs_stop_estimator(net, &ipvs->tot_stats);
14e40546
SH		 3826}
3827
3828#else
3829
2b2d2808
CG		 3830static int __net_init ip_vs_control_net_init_sysctl(struct net *net) { return 0; }
3831static void __net_exit ip_vs_control_net_cleanup_sysctl(struct net *net) { }
14e40546 3832
0443929f 3833#endif
14e40546 3834
7a4f0761
HS		 3835static struct notifier_block ip_vs_dst_notifier = {
3836 .notifier_call = ip_vs_dst_event,
3837};
3838
503cf15a 3839int __net_init ip_vs_control_net_init(struct net *net)
14e40546 3840{
827da44c 3841 int i, idx;
14e40546
SH		 3842 struct netns_ipvs *ipvs = net_ipvs(net);
3843
14e40546
SH		 3844 /* Initialize rs_table */
3845 for (idx = 0; idx < IP_VS_RTAB_SIZE; idx++)
276472ea 3846 INIT_HLIST_HEAD(&ipvs->rs_table[idx]);
14e40546
SH		 3847
3848 INIT_LIST_HEAD(&ipvs->dest_trash);
578bc3ef
JA		 3849 spin_lock_init(&ipvs->dest_trash_lock);
3850 setup_timer(&ipvs->dest_trash_timer, ip_vs_dest_trash_expire,
3851 (unsigned long) net);
14e40546
SH		 3852 atomic_set(&ipvs->ftpsvc_counter, 0);
3853 atomic_set(&ipvs->nullsvc_counter, 0);
3854
3855 /* procfs stats */
3856 ipvs->tot_stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
0a9ee813 3857 if (!ipvs->tot_stats.cpustats)
14e40546 3858 return -ENOMEM;
0a9ee813 3859
827da44c
JS		 3860 for_each_possible_cpu(i) {
3861 struct ip_vs_cpu_stats *ipvs_tot_stats;
3862 ipvs_tot_stats = per_cpu_ptr(ipvs->tot_stats.cpustats, i);
3863 u64_stats_init(&ipvs_tot_stats->syncp);
3864 }
3865
14e40546
SH		 3866 spin_lock_init(&ipvs->tot_stats.lock);
3867
d4beaa66
G		 3868 proc_create("ip_vs", 0, net->proc_net, &ip_vs_info_fops);
3869 proc_create("ip_vs_stats", 0, net->proc_net, &ip_vs_stats_fops);
3870 proc_create("ip_vs_stats_percpu", 0, net->proc_net,
3871 &ip_vs_stats_percpu_fops);
14e40546 3872
503cf15a 3873 if (ip_vs_control_net_init_sysctl(net))
14e40546
SH		 3874 goto err;
3875
3876 return 0;
3877
3878err:
2a0751af 3879 free_percpu(ipvs->tot_stats.cpustats);
61b1ab45
HS		 3880 return -ENOMEM;
3881}
3882
503cf15a 3883void __net_exit ip_vs_control_net_cleanup(struct net *net)
61b1ab45 3884{
b17fc996
HS		 3885 struct netns_ipvs *ipvs = net_ipvs(net);
3886
f2431e6e 3887 ip_vs_trash_cleanup(net);
503cf15a 3888 ip_vs_control_net_cleanup_sysctl(net);
ece31ffd
G		 3889 remove_proc_entry("ip_vs_stats_percpu", net->proc_net);
3890 remove_proc_entry("ip_vs_stats", net->proc_net);
3891 remove_proc_entry("ip_vs", net->proc_net);
2a0751af 3892 free_percpu(ipvs->tot_stats.cpustats);
61b1ab45
HS		 3893}
3894
8537de8a 3895int __init ip_vs_register_nl_ioctl(void)
1da177e4 3896{
fc723250 3897 int ret;
1da177e4 3898
1da177e4
LT		 3899 ret = nf_register_sockopt(&ip_vs_sockopts);
3900 if (ret) {
1e3e238e 3901 pr_err("cannot register sockopt.\n");
7a4f0761 3902 goto err_sock;
1da177e4
LT		 3903 }
3904
9a812198
JV		 3905 ret = ip_vs_genl_register();
3906 if (ret) {
1e3e238e 3907 pr_err("cannot register Generic Netlink interface.\n");
7a4f0761 3908 goto err_genl;
9a812198 3909 }
1da177e4 3910 return 0;
fc723250 3911
7a4f0761
HS		 3912err_genl:
3913 nf_unregister_sockopt(&ip_vs_sockopts);
3914err_sock:
fc723250 3915 return ret;
1da177e4
LT		 3916}
3917
8537de8a
HS		 3918void ip_vs_unregister_nl_ioctl(void)
3919{
3920 ip_vs_genl_unregister();
3921 nf_unregister_sockopt(&ip_vs_sockopts);
3922}
3923
3924int __init ip_vs_control_init(void)
3925{
3926 int idx;
3927 int ret;
3928
3929 EnterFunction(2);
3930
276472ea 3931 /* Initialize svc_table, ip_vs_svc_fwm_table */
8537de8a 3932 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38
JA		 3933 INIT_HLIST_HEAD(&ip_vs_svc_table[idx]);
3934 INIT_HLIST_HEAD(&ip_vs_svc_fwm_table[idx]);
8537de8a
HS		 3935 }
3936
3937 smp_wmb(); /* Do we really need it now ? */
3938
3939 ret = register_netdevice_notifier(&ip_vs_dst_notifier);
3940 if (ret < 0)
3941 return ret;
3942
3943 LeaveFunction(2);
3944 return 0;
3945}
3946
1da177e4
LT		 3947
3948void ip_vs_control_cleanup(void)
3949{
3950 EnterFunction(2);
7676e345 3951 unregister_netdevice_notifier(&ip_vs_dst_notifier);
1da177e4
LT		 3952 LeaveFunction(2);
3953}
Linux kernel - Deliverables
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