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ipvs: fix crash if scheduler is changed
[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
26c15cfd 845 if (add) {
ceec4c38 846 ip_vs_start_estimator(svc->net, &dest->stats);
413c2d04 847 list_add_rcu(&dest->n_list, &svc->destinations);
26c15cfd 848 svc->num_dests++;
05f00505
JA		 849 sched = rcu_dereference_protected(svc->scheduler, 1);
850 if (sched && sched->add_dest)
ceec4c38 851 sched->add_dest(svc, dest);
6b6df466 852 } else {
05f00505
JA		 853 sched = rcu_dereference_protected(svc->scheduler, 1);
854 if (sched && sched->upd_dest)
ceec4c38 855 sched->upd_dest(svc, dest);
26c15cfd 856 }
1da177e4
LT		 857}
858
859
860/*
861 * Create a destination for the given service
862 */
863static int
c860c6b1 864ip_vs_new_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest,
1da177e4
LT		 865 struct ip_vs_dest **dest_p)
866{
867 struct ip_vs_dest *dest;
827da44c 868 unsigned int atype, i;
1da177e4
LT		 869
870 EnterFunction(2);
871
09571c7a 872#ifdef CONFIG_IP_VS_IPV6
6cff339b 873 if (udest->af == AF_INET6) {
09571c7a 874 atype = ipv6_addr_type(&udest->addr.in6);
3bfb92f4
SW		 875 if ((!(atype & IPV6_ADDR_UNICAST) ||
876 atype & IPV6_ADDR_LINKLOCAL) &&
4a98480b 877 !__ip_vs_addr_is_local_v6(svc->net, &udest->addr.in6))
09571c7a
VB		 878 return -EINVAL;
879 } else
880#endif
881 {
4a98480b 882 atype = inet_addr_type(svc->net, udest->addr.ip);
09571c7a
VB		 883 if (atype != RTN_LOCAL && atype != RTN_UNICAST)
884 return -EINVAL;
885 }
1da177e4 886
dee06e47 887 dest = kzalloc(sizeof(struct ip_vs_dest), GFP_KERNEL);
0a9ee813 888 if (dest == NULL)
1da177e4 889 return -ENOMEM;
0a9ee813 890
b17fc996 891 dest->stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
0a9ee813 892 if (!dest->stats.cpustats)
b17fc996 893 goto err_alloc;
1da177e4 894
827da44c
JS		 895 for_each_possible_cpu(i) {
896 struct ip_vs_cpu_stats *ip_vs_dest_stats;
897 ip_vs_dest_stats = per_cpu_ptr(dest->stats.cpustats, i);
898 u64_stats_init(&ip_vs_dest_stats->syncp);
899 }
900
6cff339b 901 dest->af = udest->af;
1da177e4 902 dest->protocol = svc->protocol;
c860c6b1 903 dest->vaddr = svc->addr;
1da177e4
LT		 904 dest->vport = svc->port;
905 dest->vfwmark = svc->fwmark;
6cff339b 906 ip_vs_addr_copy(udest->af, &dest->addr, &udest->addr);
1da177e4
LT		 907 dest->port = udest->port;
908
909 atomic_set(&dest->activeconns, 0);
910 atomic_set(&dest->inactconns, 0);
911 atomic_set(&dest->persistconns, 0);
26c15cfd 912 atomic_set(&dest->refcnt, 1);
1da177e4 913
276472ea 914 INIT_HLIST_NODE(&dest->d_list);
1da177e4
LT		 915 spin_lock_init(&dest->dst_lock);
916 spin_lock_init(&dest->stats.lock);
26c15cfd 917 __ip_vs_update_dest(svc, dest, udest, 1);
1da177e4
LT		 918
919 *dest_p = dest;
920
921 LeaveFunction(2);
922 return 0;
b17fc996
HS		 923
924err_alloc:
925 kfree(dest);
926 return -ENOMEM;
1da177e4
LT		 927}
928
929
930/*
931 * Add a destination into an existing service
932 */
933static int
c860c6b1 934ip_vs_add_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
1da177e4
LT		 935{
936 struct ip_vs_dest *dest;
c860c6b1 937 union nf_inet_addr daddr;
014d730d 938 __be16 dport = udest->port;
1da177e4
LT		 939 int ret;
940
941 EnterFunction(2);
942
943 if (udest->weight < 0) {
1e3e238e 944 pr_err("%s(): server weight less than zero\n", __func__);
1da177e4
LT		 945 return -ERANGE;
946 }
947
948 if (udest->l_threshold > udest->u_threshold) {
1e3e238e
HE		 949 pr_err("%s(): lower threshold is higher than upper threshold\n",
950 __func__);
1da177e4
LT		 951 return -ERANGE;
952 }
953
6cff339b 954 ip_vs_addr_copy(udest->af, &daddr, &udest->addr);
c860c6b1 955
413c2d04
JA		 956 /* We use function that requires RCU lock */
957 rcu_read_lock();
655eef10 958 dest = ip_vs_lookup_dest(svc, udest->af, &daddr, dport);
413c2d04 959 rcu_read_unlock();
7937df15 960
1da177e4 961 if (dest != NULL) {
1e3e238e 962 IP_VS_DBG(1, "%s(): dest already exists\n", __func__);
1da177e4
LT		 963 return -EEXIST;
964 }
965
966 /*
967 * Check if the dest already exists in the trash and
968 * is from the same service
969 */
ad147aa4 970 dest = ip_vs_trash_get_dest(svc, udest->af, &daddr, dport);
7937df15 971
1da177e4 972 if (dest != NULL) {
cfc78c5a
JV		 973 IP_VS_DBG_BUF(3, "Get destination %s:%u from trash, "
974 "dest->refcnt=%d, service %u/%s:%u\n",
6cff339b 975 IP_VS_DBG_ADDR(udest->af, &daddr), ntohs(dport),
cfc78c5a
JV		 976 atomic_read(&dest->refcnt),
977 dest->vfwmark,
978 IP_VS_DBG_ADDR(svc->af, &dest->vaddr),
979 ntohs(dest->vport));
980
26c15cfd
JA		 981 __ip_vs_update_dest(svc, dest, udest, 1);
982 ret = 0;
983 } else {
1da177e4 984 /*
26c15cfd 985 * Allocate and initialize the dest structure
1da177e4 986 */
26c15cfd 987 ret = ip_vs_new_dest(svc, udest, &dest);
1da177e4 988 }
1da177e4
LT		 989 LeaveFunction(2);
990
26c15cfd 991 return ret;
1da177e4
LT		 992}
993
994
995/*
996 * Edit a destination in the given service
997 */
998static int
c860c6b1 999ip_vs_edit_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
1da177e4
LT		 1000{
1001 struct ip_vs_dest *dest;
c860c6b1 1002 union nf_inet_addr daddr;
014d730d 1003 __be16 dport = udest->port;
1da177e4
LT		 1004
1005 EnterFunction(2);
1006
1007 if (udest->weight < 0) {
1e3e238e 1008 pr_err("%s(): server weight less than zero\n", __func__);
1da177e4
LT		 1009 return -ERANGE;
1010 }
1011
1012 if (udest->l_threshold > udest->u_threshold) {
1e3e238e
HE		 1013 pr_err("%s(): lower threshold is higher than upper threshold\n",
1014 __func__);
1da177e4
LT		 1015 return -ERANGE;
1016 }
1017
6cff339b 1018 ip_vs_addr_copy(udest->af, &daddr, &udest->addr);
c860c6b1 1019
413c2d04
JA		 1020 /* We use function that requires RCU lock */
1021 rcu_read_lock();
655eef10 1022 dest = ip_vs_lookup_dest(svc, udest->af, &daddr, dport);
413c2d04 1023 rcu_read_unlock();
7937df15 1024
1da177e4 1025 if (dest == NULL) {
1e3e238e 1026 IP_VS_DBG(1, "%s(): dest doesn't exist\n", __func__);
1da177e4
LT		 1027 return -ENOENT;
1028 }
1029
26c15cfd 1030 __ip_vs_update_dest(svc, dest, udest, 0);
1da177e4
LT		 1031 LeaveFunction(2);
1032
1033 return 0;
1034}
1035
1da177e4
LT		 1036/*
1037 * Delete a destination (must be already unlinked from the service)
1038 */
578bc3ef
JA		 1039static void __ip_vs_del_dest(struct net *net, struct ip_vs_dest *dest,
1040 bool cleanup)
1da177e4 1041{
a0840e2e
HS		 1042 struct netns_ipvs *ipvs = net_ipvs(net);
1043
6ef757f9 1044 ip_vs_stop_estimator(net, &dest->stats);
1da177e4
LT		 1045
1046 /*
1047 * Remove it from the d-linked list with the real services.
1048 */
1da177e4 1049 ip_vs_rs_unhash(dest);
1da177e4 1050
578bc3ef
JA		 1051 spin_lock_bh(&ipvs->dest_trash_lock);
1052 IP_VS_DBG_BUF(3, "Moving dest %s:%u into trash, dest->refcnt=%d\n",
1053 IP_VS_DBG_ADDR(dest->af, &dest->addr), ntohs(dest->port),
1054 atomic_read(&dest->refcnt));
1055 if (list_empty(&ipvs->dest_trash) && !cleanup)
1056 mod_timer(&ipvs->dest_trash_timer,
bcbde4c0 1057 jiffies + (IP_VS_DEST_TRASH_PERIOD >> 1));
578bc3ef
JA		 1058 /* dest lives in trash without reference */
1059 list_add(&dest->t_list, &ipvs->dest_trash);
bcbde4c0 1060 dest->idle_start = 0;
578bc3ef
JA		 1061 spin_unlock_bh(&ipvs->dest_trash_lock);
1062 ip_vs_dest_put(dest);
1da177e4
LT		 1063}
1064
1065
1066/*
1067 * Unlink a destination from the given service
1068 */
1069static void __ip_vs_unlink_dest(struct ip_vs_service *svc,
1070 struct ip_vs_dest *dest,
1071 int svcupd)
1072{
1073 dest->flags &= ~IP_VS_DEST_F_AVAILABLE;
1074
1075 /*
1076 * Remove it from the d-linked destination list.
1077 */
413c2d04 1078 list_del_rcu(&dest->n_list);
1da177e4 1079 svc->num_dests--;
82dfb6f3 1080
391f503d
AG		 1081 if (dest->af != svc->af)
1082 net_ipvs(svc->net)->mixed_address_family_dests--;
1083
ceec4c38
JA		 1084 if (svcupd) {
1085 struct ip_vs_scheduler *sched;
6b6df466 1086
ceec4c38 1087 sched = rcu_dereference_protected(svc->scheduler, 1);
05f00505 1088 if (sched && sched->del_dest)
ceec4c38
JA		 1089 sched->del_dest(svc, dest);
1090 }
1da177e4
LT		 1091}
1092
1093
1094/*
1095 * Delete a destination server in the given service
1096 */
1097static int
c860c6b1 1098ip_vs_del_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
1da177e4
LT		 1099{
1100 struct ip_vs_dest *dest;
014d730d 1101 __be16 dport = udest->port;
1da177e4
LT		 1102
1103 EnterFunction(2);
1104
413c2d04
JA		 1105 /* We use function that requires RCU lock */
1106 rcu_read_lock();
655eef10 1107 dest = ip_vs_lookup_dest(svc, udest->af, &udest->addr, dport);
413c2d04 1108 rcu_read_unlock();
c860c6b1 1109
1da177e4 1110 if (dest == NULL) {
1e3e238e 1111 IP_VS_DBG(1, "%s(): destination not found!\n", __func__);
1da177e4
LT		 1112 return -ENOENT;
1113 }
1114
1da177e4
LT		 1115 /*
1116 * Unlink dest from the service
1117 */
1118 __ip_vs_unlink_dest(svc, dest, 1);
1119
1da177e4
LT		 1120 /*
1121 * Delete the destination
1122 */
578bc3ef 1123 __ip_vs_del_dest(svc->net, dest, false);
1da177e4
LT		 1124
1125 LeaveFunction(2);
1126
1127 return 0;
1128}
1129
578bc3ef
JA		 1130static void ip_vs_dest_trash_expire(unsigned long data)
1131{
1132 struct net *net = (struct net *) data;
1133 struct netns_ipvs *ipvs = net_ipvs(net);
1134 struct ip_vs_dest *dest, *next;
bcbde4c0 1135 unsigned long now = jiffies;
578bc3ef
JA		 1136
1137 spin_lock(&ipvs->dest_trash_lock);
1138 list_for_each_entry_safe(dest, next, &ipvs->dest_trash, t_list) {
578bc3ef
JA		 1139 if (atomic_read(&dest->refcnt) > 0)
1140 continue;
bcbde4c0
JA		 1141 if (dest->idle_start) {
1142 if (time_before(now, dest->idle_start +
1143 IP_VS_DEST_TRASH_PERIOD))
1144 continue;
1145 } else {
1146 dest->idle_start = max(1UL, now);
1147 continue;
1148 }
578bc3ef
JA		 1149 IP_VS_DBG_BUF(3, "Removing destination %u/%s:%u from trash\n",
1150 dest->vfwmark,
bcbde4c0 1151 IP_VS_DBG_ADDR(dest->af, &dest->addr),
578bc3ef
JA		 1152 ntohs(dest->port));
1153 list_del(&dest->t_list);
1154 ip_vs_dest_free(dest);
1155 }
1156 if (!list_empty(&ipvs->dest_trash))
1157 mod_timer(&ipvs->dest_trash_timer,
bcbde4c0 1158 jiffies + (IP_VS_DEST_TRASH_PERIOD >> 1));
578bc3ef
JA		 1159 spin_unlock(&ipvs->dest_trash_lock);
1160}
1da177e4
LT		 1161
1162/*
1163 * Add a service into the service hash table
1164 */
1165static int
fc723250 1166ip_vs_add_service(struct net *net, struct ip_vs_service_user_kern *u,
c860c6b1 1167 struct ip_vs_service **svc_p)
1da177e4 1168{
827da44c 1169 int ret = 0, i;
1da177e4 1170 struct ip_vs_scheduler *sched = NULL;
0d1e71b0 1171 struct ip_vs_pe *pe = NULL;
1da177e4 1172 struct ip_vs_service *svc = NULL;
a0840e2e 1173 struct netns_ipvs *ipvs = net_ipvs(net);
1da177e4
LT		 1174
1175 /* increase the module use count */
1176 ip_vs_use_count_inc();
1177
1178 /* Lookup the scheduler by 'u->sched_name' */
05f00505
JA		 1179 if (strcmp(u->sched_name, "none")) {
1180 sched = ip_vs_scheduler_get(u->sched_name);
1181 if (!sched) {
1182 pr_info("Scheduler module ip_vs_%s not found\n",
1183 u->sched_name);
1184 ret = -ENOENT;
1185 goto out_err;
1186 }
1da177e4
LT		 1187 }
1188
0d1e71b0 1189 if (u->pe_name && *u->pe_name) {
e9e5eee8 1190 pe = ip_vs_pe_getbyname(u->pe_name);
0d1e71b0
SH		 1191 if (pe == NULL) {
1192 pr_info("persistence engine module ip_vs_pe_%s "
1193 "not found\n", u->pe_name);
1194 ret = -ENOENT;
1195 goto out_err;
1196 }
1197 }
1198
f94fd041 1199#ifdef CONFIG_IP_VS_IPV6
0a925864
JA		 1200 if (u->af == AF_INET6) {
1201 __u32 plen = (__force __u32) u->netmask;
1202
1203 if (plen < 1 || plen > 128) {
1204 ret = -EINVAL;
1205 goto out_err;
1206 }
f94fd041
JV		 1207 }
1208#endif
1209
dee06e47 1210 svc = kzalloc(sizeof(struct ip_vs_service), GFP_KERNEL);
1da177e4 1211 if (svc == NULL) {
1e3e238e 1212 IP_VS_DBG(1, "%s(): no memory\n", __func__);
1da177e4
LT		 1213 ret = -ENOMEM;
1214 goto out_err;
1215 }
b17fc996 1216 svc->stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
0a54e939
JL		 1217 if (!svc->stats.cpustats) {
1218 ret = -ENOMEM;
b17fc996 1219 goto out_err;
0a54e939 1220 }
1da177e4 1221
827da44c
JS		 1222 for_each_possible_cpu(i) {
1223 struct ip_vs_cpu_stats *ip_vs_stats;
1224 ip_vs_stats = per_cpu_ptr(svc->stats.cpustats, i);
1225 u64_stats_init(&ip_vs_stats->syncp);
1226 }
1227
1228
1da177e4 1229 /* I'm the first user of the service */
1da177e4
LT		 1230 atomic_set(&svc->refcnt, 0);
1231
c860c6b1 1232 svc->af = u->af;
1da177e4 1233 svc->protocol = u->protocol;
c860c6b1 1234 ip_vs_addr_copy(svc->af, &svc->addr, &u->addr);
1da177e4
LT		 1235 svc->port = u->port;
1236 svc->fwmark = u->fwmark;
1237 svc->flags = u->flags;
1238 svc->timeout = u->timeout * HZ;
1239 svc->netmask = u->netmask;
fc723250 1240 svc->net = net;
1da177e4
LT		 1241
1242 INIT_LIST_HEAD(&svc->destinations);
ba3a3ce1 1243 spin_lock_init(&svc->sched_lock);
1da177e4
LT		 1244 spin_lock_init(&svc->stats.lock);
1245
1246 /* Bind the scheduler */
05f00505
JA		 1247 if (sched) {
1248 ret = ip_vs_bind_scheduler(svc, sched);
1249 if (ret)
1250 goto out_err;
1251 sched = NULL;
1252 }
1da177e4 1253
0d1e71b0 1254 /* Bind the ct retriever */
ceec4c38 1255 RCU_INIT_POINTER(svc->pe, pe);
0d1e71b0
SH		 1256 pe = NULL;
1257
1da177e4
LT		 1258 /* Update the virtual service counters */
1259 if (svc->port == FTPPORT)
763f8d0e 1260 atomic_inc(&ipvs->ftpsvc_counter);
1da177e4 1261 else if (svc->port == 0)
763f8d0e 1262 atomic_inc(&ipvs->nullsvc_counter);
1da177e4 1263
6ef757f9 1264 ip_vs_start_estimator(net, &svc->stats);
f94fd041
JV		 1265
1266 /* Count only IPv4 services for old get/setsockopt interface */
1267 if (svc->af == AF_INET)
a0840e2e 1268 ipvs->num_services++;
1da177e4
LT		 1269
1270 /* Hash the service into the service table */
1da177e4 1271 ip_vs_svc_hash(svc);
1da177e4
LT		 1272
1273 *svc_p = svc;
7a4f0761
HS		 1274 /* Now there is a service - full throttle */
1275 ipvs->enable = 1;
1da177e4
LT		 1276 return 0;
1277
b17fc996 1278
6e08bfb8 1279 out_err:
1da177e4 1280 if (svc != NULL) {
ceec4c38
JA		 1281 ip_vs_unbind_scheduler(svc, sched);
1282 ip_vs_service_free(svc);
1da177e4
LT		 1283 }
1284 ip_vs_scheduler_put(sched);
0d1e71b0 1285 ip_vs_pe_put(pe);
1da177e4 1286
1da177e4
LT		 1287 /* decrease the module use count */
1288 ip_vs_use_count_dec();
1289
1290 return ret;
1291}
1292
1293
1294/*
1295 * Edit a service and bind it with a new scheduler
1296 */
1297static int
c860c6b1 1298ip_vs_edit_service(struct ip_vs_service *svc, struct ip_vs_service_user_kern *u)
1da177e4 1299{
05f00505 1300 struct ip_vs_scheduler *sched = NULL, *old_sched;
0d1e71b0 1301 struct ip_vs_pe *pe = NULL, *old_pe = NULL;
1da177e4
LT		 1302 int ret = 0;
1303
1304 /*
1305 * Lookup the scheduler, by 'u->sched_name'
1306 */
05f00505
JA		 1307 if (strcmp(u->sched_name, "none")) {
1308 sched = ip_vs_scheduler_get(u->sched_name);
1309 if (!sched) {
1310 pr_info("Scheduler module ip_vs_%s not found\n",
1311 u->sched_name);
1312 return -ENOENT;
1313 }
1da177e4
LT		 1314 }
1315 old_sched = sched;
1316
0d1e71b0 1317 if (u->pe_name && *u->pe_name) {
e9e5eee8 1318 pe = ip_vs_pe_getbyname(u->pe_name);
0d1e71b0
SH		 1319 if (pe == NULL) {
1320 pr_info("persistence engine module ip_vs_pe_%s "
1321 "not found\n", u->pe_name);
1322 ret = -ENOENT;
1323 goto out;
1324 }
1325 old_pe = pe;
1326 }
1327
f94fd041 1328#ifdef CONFIG_IP_VS_IPV6
0a925864
JA		 1329 if (u->af == AF_INET6) {
1330 __u32 plen = (__force __u32) u->netmask;
1331
1332 if (plen < 1 || plen > 128) {
1333 ret = -EINVAL;
1334 goto out;
1335 }
f94fd041
JV		 1336 }
1337#endif
1338
ceec4c38
JA		 1339 old_sched = rcu_dereference_protected(svc->scheduler, 1);
1340 if (sched != old_sched) {
05f00505
JA		 1341 if (old_sched) {
1342 ip_vs_unbind_scheduler(svc, old_sched);
1343 RCU_INIT_POINTER(svc->scheduler, NULL);
1344 /* Wait all svc->sched_data users */
1345 synchronize_rcu();
1346 }
ceec4c38 1347 /* Bind the new scheduler */
05f00505
JA		 1348 if (sched) {
1349 ret = ip_vs_bind_scheduler(svc, sched);
1350 if (ret) {
1351 ip_vs_scheduler_put(sched);
1352 goto out;
1353 }
ceec4c38 1354 }
ceec4c38 1355 }
1da177e4
LT		 1356
1357 /*
1358 * Set the flags and timeout value
1359 */
1360 svc->flags = u->flags | IP_VS_SVC_F_HASHED;
1361 svc->timeout = u->timeout * HZ;
1362 svc->netmask = u->netmask;
1363
ceec4c38
JA		 1364 old_pe = rcu_dereference_protected(svc->pe, 1);
1365 if (pe != old_pe)
1366 rcu_assign_pointer(svc->pe, pe);
1da177e4 1367
552ad65a 1368out:
6e08bfb8 1369 ip_vs_scheduler_put(old_sched);
0d1e71b0 1370 ip_vs_pe_put(old_pe);
1da177e4
LT		 1371 return ret;
1372}
1373
1da177e4
LT		 1374/*
1375 * Delete a service from the service list
1376 * - The service must be unlinked, unlocked and not referenced!
1377 * - We are called under _bh lock
1378 */
578bc3ef 1379static void __ip_vs_del_service(struct ip_vs_service *svc, bool cleanup)
1da177e4
LT		 1380{
1381 struct ip_vs_dest *dest, *nxt;
1382 struct ip_vs_scheduler *old_sched;
0d1e71b0 1383 struct ip_vs_pe *old_pe;
a0840e2e 1384 struct netns_ipvs *ipvs = net_ipvs(svc->net);
0d1e71b0
SH		 1385
1386 pr_info("%s: enter\n", __func__);
1da177e4 1387
f94fd041
JV		 1388 /* Count only IPv4 services for old get/setsockopt interface */
1389 if (svc->af == AF_INET)
a0840e2e 1390 ipvs->num_services--;
f94fd041 1391
6ef757f9 1392 ip_vs_stop_estimator(svc->net, &svc->stats);
1da177e4
LT		 1393
1394 /* Unbind scheduler */
ceec4c38
JA		 1395 old_sched = rcu_dereference_protected(svc->scheduler, 1);
1396 ip_vs_unbind_scheduler(svc, old_sched);
6e08bfb8 1397 ip_vs_scheduler_put(old_sched);
1da177e4 1398
ceec4c38
JA		 1399 /* Unbind persistence engine, keep svc->pe */
1400 old_pe = rcu_dereference_protected(svc->pe, 1);
0d1e71b0
SH		 1401 ip_vs_pe_put(old_pe);
1402
1da177e4
LT		 1403 /*
1404 * Unlink the whole destination list
1405 */
1406 list_for_each_entry_safe(dest, nxt, &svc->destinations, n_list) {
1407 __ip_vs_unlink_dest(svc, dest, 0);
578bc3ef 1408 __ip_vs_del_dest(svc->net, dest, cleanup);
1da177e4
LT		 1409 }
1410
1411 /*
1412 * Update the virtual service counters
1413 */
1414 if (svc->port == FTPPORT)
763f8d0e 1415 atomic_dec(&ipvs->ftpsvc_counter);
1da177e4 1416 else if (svc->port == 0)
763f8d0e 1417 atomic_dec(&ipvs->nullsvc_counter);
1da177e4
LT		 1418
1419 /*
1420 * Free the service if nobody refers to it
1421 */
bcbde4c0 1422 __ip_vs_svc_put(svc, true);
1da177e4
LT		 1423
1424 /* decrease the module use count */
1425 ip_vs_use_count_dec();
1426}
1427
1428/*
26c15cfd 1429 * Unlink a service from list and try to delete it if its refcnt reached 0
1da177e4 1430 */
578bc3ef 1431static void ip_vs_unlink_service(struct ip_vs_service *svc, bool cleanup)
1da177e4 1432{
ceec4c38
JA		 1433 /* Hold svc to avoid double release from dest_trash */
1434 atomic_inc(&svc->refcnt);
1da177e4
LT		 1435 /*
1436 * Unhash it from the service table
1437 */
1da177e4
LT		 1438 ip_vs_svc_unhash(svc);
1439
578bc3ef 1440 __ip_vs_del_service(svc, cleanup);
26c15cfd
JA		 1441}
1442
1443/*
1444 * Delete a service from the service list
1445 */
1446static int ip_vs_del_service(struct ip_vs_service *svc)
1447{
1448 if (svc == NULL)
1449 return -EEXIST;
578bc3ef 1450 ip_vs_unlink_service(svc, false);
1da177e4
LT		 1451
1452 return 0;
1453}
1454
1455
1456/*
1457 * Flush all the virtual services
1458 */
578bc3ef 1459static int ip_vs_flush(struct net *net, bool cleanup)
1da177e4
LT		 1460{
1461 int idx;
ceec4c38
JA		 1462 struct ip_vs_service *svc;
1463 struct hlist_node *n;
1da177e4
LT		 1464
1465 /*
fc723250 1466 * Flush the service table hashed by <netns,protocol,addr,port>
1da177e4
LT		 1467 */
1468 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38
JA		 1469 hlist_for_each_entry_safe(svc, n, &ip_vs_svc_table[idx],
1470 s_list) {
fc723250 1471 if (net_eq(svc->net, net))
578bc3ef 1472 ip_vs_unlink_service(svc, cleanup);
1da177e4
LT		 1473 }
1474 }
1475
1476 /*
1477 * Flush the service table hashed by fwmark
1478 */
1479 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38
JA		 1480 hlist_for_each_entry_safe(svc, n, &ip_vs_svc_fwm_table[idx],
1481 f_list) {
fc723250 1482 if (net_eq(svc->net, net))
578bc3ef 1483 ip_vs_unlink_service(svc, cleanup);
1da177e4
LT		 1484 }
1485 }
1486
1487 return 0;
1488}
1489
7a4f0761
HS		 1490/*
1491 * Delete service by {netns} in the service table.
1492 * Called by __ip_vs_cleanup()
1493 */
503cf15a 1494void ip_vs_service_net_cleanup(struct net *net)
7a4f0761
HS		 1495{
1496 EnterFunction(2);
1497 /* Check for "full" addressed entries */
1498 mutex_lock(&__ip_vs_mutex);
578bc3ef 1499 ip_vs_flush(net, true);
7a4f0761
HS		 1500 mutex_unlock(&__ip_vs_mutex);
1501 LeaveFunction(2);
1502}
d1deae4d
JA		 1503
1504/* Put all references for device (dst_cache) */
7a4f0761 1505static inline void
d1deae4d 1506ip_vs_forget_dev(struct ip_vs_dest *dest, struct net_device *dev)
7a4f0761 1507{
d717bb2a
JA		 1508 struct ip_vs_dest_dst *dest_dst;
1509
7a4f0761 1510 spin_lock_bh(&dest->dst_lock);
d717bb2a
JA		 1511 dest_dst = rcu_dereference_protected(dest->dest_dst, 1);
1512 if (dest_dst && dest_dst->dst_cache->dev == dev) {
7a4f0761
HS		 1513 IP_VS_DBG_BUF(3, "Reset dev:%s dest %s:%u ,dest->refcnt=%d\n",
1514 dev->name,
1515 IP_VS_DBG_ADDR(dest->af, &dest->addr),
1516 ntohs(dest->port),
1517 atomic_read(&dest->refcnt));
d1deae4d 1518 __ip_vs_dst_cache_reset(dest);
7a4f0761
HS		 1519 }
1520 spin_unlock_bh(&dest->dst_lock);
1521
1522}
313eae63
JA		 1523/* Netdev event receiver
1524 * Currently only NETDEV_DOWN is handled to release refs to cached dsts
7a4f0761
HS		 1525 */
1526static int ip_vs_dst_event(struct notifier_block *this, unsigned long event,
351638e7 1527 void *ptr)
7a4f0761 1528{
351638e7 1529 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
7a4f0761 1530 struct net *net = dev_net(dev);
283283c4 1531 struct netns_ipvs *ipvs = net_ipvs(net);
7a4f0761
HS		 1532 struct ip_vs_service *svc;
1533 struct ip_vs_dest *dest;
1534 unsigned int idx;
1535
313eae63 1536 if (event != NETDEV_DOWN || !ipvs)
7a4f0761
HS		 1537 return NOTIFY_DONE;
1538 IP_VS_DBG(3, "%s() dev=%s\n", __func__, dev->name);
1539 EnterFunction(2);
1540 mutex_lock(&__ip_vs_mutex);
1541 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38 1542 hlist_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
7a4f0761
HS		 1543 if (net_eq(svc->net, net)) {
1544 list_for_each_entry(dest, &svc->destinations,
1545 n_list) {
d1deae4d 1546 ip_vs_forget_dev(dest, dev);
7a4f0761
HS		 1547 }
1548 }
1549 }
1550
ceec4c38 1551 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
7a4f0761
HS		 1552 if (net_eq(svc->net, net)) {
1553 list_for_each_entry(dest, &svc->destinations,
1554 n_list) {
d1deae4d 1555 ip_vs_forget_dev(dest, dev);
7a4f0761
HS		 1556 }
1557 }
1558
1559 }
1560 }
1561
578bc3ef
JA		 1562 spin_lock_bh(&ipvs->dest_trash_lock);
1563 list_for_each_entry(dest, &ipvs->dest_trash, t_list) {
d1deae4d 1564 ip_vs_forget_dev(dest, dev);
7a4f0761 1565 }
578bc3ef 1566 spin_unlock_bh(&ipvs->dest_trash_lock);
7a4f0761
HS		 1567 mutex_unlock(&__ip_vs_mutex);
1568 LeaveFunction(2);
1569 return NOTIFY_DONE;
1570}
1da177e4
LT		 1571
1572/*
1573 * Zero counters in a service or all services
1574 */
1575static int ip_vs_zero_service(struct ip_vs_service *svc)
1576{
1577 struct ip_vs_dest *dest;
1578
1da177e4
LT		 1579 list_for_each_entry(dest, &svc->destinations, n_list) {
1580 ip_vs_zero_stats(&dest->stats);
1581 }
1582 ip_vs_zero_stats(&svc->stats);
1da177e4
LT		 1583 return 0;
1584}
1585
fc723250 1586static int ip_vs_zero_all(struct net *net)
1da177e4
LT		 1587{
1588 int idx;
1589 struct ip_vs_service *svc;
1590
1591 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38 1592 hlist_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
fc723250
HS		 1593 if (net_eq(svc->net, net))
1594 ip_vs_zero_service(svc);
1da177e4
LT		 1595 }
1596 }
1597
1598 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38 1599 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
fc723250
HS		 1600 if (net_eq(svc->net, net))
1601 ip_vs_zero_service(svc);
1da177e4
LT		 1602 }
1603 }
1604
2a0751af 1605 ip_vs_zero_stats(&net_ipvs(net)->tot_stats);
1da177e4
LT		 1606 return 0;
1607}
1608
14e40546 1609#ifdef CONFIG_SYSCTL
749c42b6
JA		 1610
1611static int zero;
1612static int three = 3;
1613
1da177e4 1614static int
fe2c6338 1615proc_do_defense_mode(struct ctl_table *table, int write,
1da177e4
LT		 1616 void __user *buffer, size_t *lenp, loff_t *ppos)
1617{
9330419d 1618 struct net *net = current->nsproxy->net_ns;
1da177e4
LT		 1619 int *valp = table->data;
1620 int val = *valp;
1621 int rc;
1622
8d65af78 1623 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1da177e4
LT		 1624 if (write && (*valp != val)) {
1625 if ((*valp < 0) || (*valp > 3)) {
1626 /* Restore the correct value */
1627 *valp = val;
1628 } else {
9330419d 1629 update_defense_level(net_ipvs(net));
1da177e4
LT		 1630 }
1631 }
1632 return rc;
1633}
1634
1da177e4 1635static int
fe2c6338 1636proc_do_sync_threshold(struct ctl_table *table, int write,
1da177e4
LT		 1637 void __user *buffer, size_t *lenp, loff_t *ppos)
1638{
1639 int *valp = table->data;
1640 int val[2];
1641 int rc;
1642
1643 /* backup the value first */
1644 memcpy(val, valp, sizeof(val));
1645
8d65af78 1646 rc = proc_dointvec(table, write, buffer, lenp, ppos);
749c42b6
JA		 1647 if (write && (valp[0] < 0 || valp[1] < 0 ||
1648 (valp[0] >= valp[1] && valp[1]))) {
1da177e4
LT		 1649 /* Restore the correct value */
1650 memcpy(valp, val, sizeof(val));
1651 }
1652 return rc;
1653}
1654
b880c1f0 1655static int
fe2c6338 1656proc_do_sync_mode(struct ctl_table *table, int write,
b880c1f0
HS		 1657 void __user *buffer, size_t *lenp, loff_t *ppos)
1658{
1659 int *valp = table->data;
1660 int val = *valp;
1661 int rc;
1662
1663 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1664 if (write && (*valp != val)) {
1665 if ((*valp < 0) || (*valp > 1)) {
1666 /* Restore the correct value */
1667 *valp = val;
f73181c8
PNA		 1668 }
1669 }
1670 return rc;
1671}
1672
1673static int
fe2c6338 1674proc_do_sync_ports(struct ctl_table *table, int write,
f73181c8
PNA		 1675 void __user *buffer, size_t *lenp, loff_t *ppos)
1676{
1677 int *valp = table->data;
1678 int val = *valp;
1679 int rc;
1680
1681 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1682 if (write && (*valp != val)) {
1683 if (*valp < 1 || !is_power_of_2(*valp)) {
1684 /* Restore the correct value */
1685 *valp = val;
b880c1f0
HS		 1686 }
1687 }
1688 return rc;
1689}
1da177e4
LT		 1690
1691/*
1692 * IPVS sysctl table (under the /proc/sys/net/ipv4/vs/)
a0840e2e 1693 * Do not change order or insert new entries without
503cf15a 1694 * align with netns init in ip_vs_control_net_init()
1da177e4
LT		 1695 */
1696
1697static struct ctl_table vs_vars[] = {
1698 {
1da177e4 1699 .procname = "amemthresh",
1da177e4
LT		 1700 .maxlen = sizeof(int),
1701 .mode = 0644,
6d9f239a 1702 .proc_handler = proc_dointvec,
1da177e4 1703 },
1da177e4 1704 {
1da177e4 1705 .procname = "am_droprate",
1da177e4
LT		 1706 .maxlen = sizeof(int),
1707 .mode = 0644,
6d9f239a 1708 .proc_handler = proc_dointvec,
1da177e4
LT		 1709 },
1710 {
1da177e4 1711 .procname = "drop_entry",
1da177e4
LT		 1712 .maxlen = sizeof(int),
1713 .mode = 0644,
6d9f239a 1714 .proc_handler = proc_do_defense_mode,
1da177e4
LT		 1715 },
1716 {
1da177e4 1717 .procname = "drop_packet",
1da177e4
LT		 1718 .maxlen = sizeof(int),
1719 .mode = 0644,
6d9f239a 1720 .proc_handler = proc_do_defense_mode,
1da177e4 1721 },
f4bc17cd
JA		 1722#ifdef CONFIG_IP_VS_NFCT
1723 {
1724 .procname = "conntrack",
f4bc17cd
JA		 1725 .maxlen = sizeof(int),
1726 .mode = 0644,
1727 .proc_handler = &proc_dointvec,
1728 },
1729#endif
1da177e4 1730 {
1da177e4 1731 .procname = "secure_tcp",
1da177e4
LT		 1732 .maxlen = sizeof(int),
1733 .mode = 0644,
6d9f239a 1734 .proc_handler = proc_do_defense_mode,
1da177e4 1735 },
8a803040
JA		 1736 {
1737 .procname = "snat_reroute",
8a803040
JA		 1738 .maxlen = sizeof(int),
1739 .mode = 0644,
1740 .proc_handler = &proc_dointvec,
1741 },
b880c1f0
HS		 1742 {
1743 .procname = "sync_version",
b880c1f0
HS		 1744 .maxlen = sizeof(int),
1745 .mode = 0644,
1746 .proc_handler = &proc_do_sync_mode,
1747 },
f73181c8
PNA		 1748 {
1749 .procname = "sync_ports",
1750 .maxlen = sizeof(int),
1751 .mode = 0644,
1752 .proc_handler = &proc_do_sync_ports,
1753 },
4d0c875d
JA		 1754 {
1755 .procname = "sync_persist_mode",
1756 .maxlen = sizeof(int),
1757 .mode = 0644,
1758 .proc_handler = proc_dointvec,
1759 },
1c003b15
PNA		 1760 {
1761 .procname = "sync_qlen_max",
07995674 1762 .maxlen = sizeof(unsigned long),
1c003b15 1763 .mode = 0644,
07995674 1764 .proc_handler = proc_doulongvec_minmax,
1c003b15
PNA		 1765 },
1766 {
1767 .procname = "sync_sock_size",
1768 .maxlen = sizeof(int),
1769 .mode = 0644,
1770 .proc_handler = proc_dointvec,
1771 },
a0840e2e
HS		 1772 {
1773 .procname = "cache_bypass",
1774 .maxlen = sizeof(int),
1775 .mode = 0644,
1776 .proc_handler = proc_dointvec,
1777 },
1778 {
1779 .procname = "expire_nodest_conn",
1780 .maxlen = sizeof(int),
1781 .mode = 0644,
1782 .proc_handler = proc_dointvec,
1783 },
c6c96c18
AF		 1784 {
1785 .procname = "sloppy_tcp",
1786 .maxlen = sizeof(int),
1787 .mode = 0644,
1788 .proc_handler = proc_dointvec,
1789 },
1790 {
1791 .procname = "sloppy_sctp",
1792 .maxlen = sizeof(int),
1793 .mode = 0644,
1794 .proc_handler = proc_dointvec,
1795 },
a0840e2e
HS		 1796 {
1797 .procname = "expire_quiescent_template",
1798 .maxlen = sizeof(int),
1799 .mode = 0644,
1800 .proc_handler = proc_dointvec,
1801 },
1802 {
1803 .procname = "sync_threshold",
1804 .maxlen =
1805 sizeof(((struct netns_ipvs *)0)->sysctl_sync_threshold),
1806 .mode = 0644,
1807 .proc_handler = proc_do_sync_threshold,
1808 },
749c42b6
JA		 1809 {
1810 .procname = "sync_refresh_period",
1811 .maxlen = sizeof(int),
1812 .mode = 0644,
1813 .proc_handler = proc_dointvec_jiffies,
1814 },
1815 {
1816 .procname = "sync_retries",
1817 .maxlen = sizeof(int),
1818 .mode = 0644,
1819 .proc_handler = proc_dointvec_minmax,
1820 .extra1 = &zero,
1821 .extra2 = &three,
1822 },
a0840e2e
HS		 1823 {
1824 .procname = "nat_icmp_send",
1825 .maxlen = sizeof(int),
1826 .mode = 0644,
1827 .proc_handler = proc_dointvec,
1828 },
3654e611
JA		 1829 {
1830 .procname = "pmtu_disc",
1831 .maxlen = sizeof(int),
1832 .mode = 0644,
1833 .proc_handler = proc_dointvec,
1834 },
0c12582f
JA		 1835 {
1836 .procname = "backup_only",
1837 .maxlen = sizeof(int),
1838 .mode = 0644,
1839 .proc_handler = proc_dointvec,
1840 },
d752c364
MRL		 1841 {
1842 .procname = "conn_reuse_mode",
1843 .maxlen = sizeof(int),
1844 .mode = 0644,
1845 .proc_handler = proc_dointvec,
1846 },
a0840e2e
HS		 1847#ifdef CONFIG_IP_VS_DEBUG
1848 {
1849 .procname = "debug_level",
1850 .data = &sysctl_ip_vs_debug_level,
1851 .maxlen = sizeof(int),
1852 .mode = 0644,
1853 .proc_handler = proc_dointvec,
1854 },
1da177e4 1855#endif
f8572d8f 1856 { }
1da177e4
LT		 1857};
1858
14e40546 1859#endif
1da177e4 1860
1da177e4
LT		 1861#ifdef CONFIG_PROC_FS
1862
1863struct ip_vs_iter {
fc723250 1864 struct seq_net_private p; /* Do not move this, netns depends upon it*/
ceec4c38 1865 struct hlist_head *table;
1da177e4
LT		 1866 int bucket;
1867};
1868
1869/*
1870 * Write the contents of the VS rule table to a PROCfs file.
1871 * (It is kept just for backward compatibility)
1872 */
95c96174 1873static inline const char *ip_vs_fwd_name(unsigned int flags)
1da177e4
LT		 1874{
1875 switch (flags & IP_VS_CONN_F_FWD_MASK) {
1876 case IP_VS_CONN_F_LOCALNODE:
1877 return "Local";
1878 case IP_VS_CONN_F_TUNNEL:
1879 return "Tunnel";
1880 case IP_VS_CONN_F_DROUTE:
1881 return "Route";
1882 default:
1883 return "Masq";
1884 }
1885}
1886
1887
1888/* Get the Nth entry in the two lists */
1889static struct ip_vs_service *ip_vs_info_array(struct seq_file *seq, loff_t pos)
1890{
fc723250 1891 struct net *net = seq_file_net(seq);
1da177e4
LT		 1892 struct ip_vs_iter *iter = seq->private;
1893 int idx;
1894 struct ip_vs_service *svc;
1895
1896 /* look in hash by protocol */
1897 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38 1898 hlist_for_each_entry_rcu(svc, &ip_vs_svc_table[idx], s_list) {
fc723250 1899 if (net_eq(svc->net, net) && pos-- == 0) {
1da177e4
LT		 1900 iter->table = ip_vs_svc_table;
1901 iter->bucket = idx;
1902 return svc;
1903 }
1904 }
1905 }
1906
1907 /* keep looking in fwmark */
1908 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38
JA		 1909 hlist_for_each_entry_rcu(svc, &ip_vs_svc_fwm_table[idx],
1910 f_list) {
fc723250 1911 if (net_eq(svc->net, net) && pos-- == 0) {
1da177e4
LT		 1912 iter->table = ip_vs_svc_fwm_table;
1913 iter->bucket = idx;
1914 return svc;
1915 }
1916 }
1917 }
1918
1919 return NULL;
1920}
1921
1922static void *ip_vs_info_seq_start(struct seq_file *seq, loff_t *pos)
371990ee 1923 __acquires(RCU)
1da177e4 1924{
ceec4c38 1925 rcu_read_lock();
1da177e4
LT		 1926 return *pos ? ip_vs_info_array(seq, *pos - 1) : SEQ_START_TOKEN;
1927}
1928
1929
1930static void *ip_vs_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1931{
ceec4c38 1932 struct hlist_node *e;
1da177e4
LT		 1933 struct ip_vs_iter *iter;
1934 struct ip_vs_service *svc;
1935
1936 ++*pos;
1937 if (v == SEQ_START_TOKEN)
1938 return ip_vs_info_array(seq,0);
1939
1940 svc = v;
1941 iter = seq->private;
1942
1943 if (iter->table == ip_vs_svc_table) {
1944 /* next service in table hashed by protocol */
ceec4c38
JA		 1945 e = rcu_dereference(hlist_next_rcu(&svc->s_list));
1946 if (e)
1947 return hlist_entry(e, struct ip_vs_service, s_list);
1da177e4
LT		 1948
1949 while (++iter->bucket < IP_VS_SVC_TAB_SIZE) {
ceec4c38
JA		 1950 hlist_for_each_entry_rcu(svc,
1951 &ip_vs_svc_table[iter->bucket],
1952 s_list) {
1da177e4
LT		 1953 return svc;
1954 }
1955 }
1956
1957 iter->table = ip_vs_svc_fwm_table;
1958 iter->bucket = -1;
1959 goto scan_fwmark;
1960 }
1961
1962 /* next service in hashed by fwmark */
ceec4c38
JA		 1963 e = rcu_dereference(hlist_next_rcu(&svc->f_list));
1964 if (e)
1965 return hlist_entry(e, struct ip_vs_service, f_list);
1da177e4
LT		 1966
1967 scan_fwmark:
1968 while (++iter->bucket < IP_VS_SVC_TAB_SIZE) {
ceec4c38
JA		 1969 hlist_for_each_entry_rcu(svc,
1970 &ip_vs_svc_fwm_table[iter->bucket],
1971 f_list)
1da177e4
LT		 1972 return svc;
1973 }
1974
1975 return NULL;
1976}
1977
1978static void ip_vs_info_seq_stop(struct seq_file *seq, void *v)
371990ee 1979 __releases(RCU)
1da177e4 1980{
ceec4c38 1981 rcu_read_unlock();
1da177e4
LT		 1982}
1983
1984
1985static int ip_vs_info_seq_show(struct seq_file *seq, void *v)
1986{
1987 if (v == SEQ_START_TOKEN) {
1988 seq_printf(seq,
1989 "IP Virtual Server version %d.%d.%d (size=%d)\n",
6f7edb48 1990 NVERSION(IP_VS_VERSION_CODE), ip_vs_conn_tab_size);
1da177e4
LT		 1991 seq_puts(seq,
1992 "Prot LocalAddress:Port Scheduler Flags\n");
1993 seq_puts(seq,
1994 " -> RemoteAddress:Port Forward Weight ActiveConn InActConn\n");
1995 } else {
1996 const struct ip_vs_service *svc = v;
1997 const struct ip_vs_iter *iter = seq->private;
1998 const struct ip_vs_dest *dest;
ceec4c38 1999 struct ip_vs_scheduler *sched = rcu_dereference(svc->scheduler);
05f00505 2000 char *sched_name = sched ? sched->name : "none";
1da177e4 2001
667a5f18
VB		 2002 if (iter->table == ip_vs_svc_table) {
2003#ifdef CONFIG_IP_VS_IPV6
2004 if (svc->af == AF_INET6)
5b095d98 2005 seq_printf(seq, "%s [%pI6]:%04X %s ",
667a5f18 2006 ip_vs_proto_name(svc->protocol),
38ff4fa4 2007 &svc->addr.in6,
667a5f18 2008 ntohs(svc->port),
05f00505 2009 sched_name);
667a5f18
VB		 2010 else
2011#endif
26ec037f 2012 seq_printf(seq, "%s %08X:%04X %s %s ",
667a5f18
VB		 2013 ip_vs_proto_name(svc->protocol),
2014 ntohl(svc->addr.ip),
2015 ntohs(svc->port),
05f00505 2016 sched_name,
26ec037f 2017 (svc->flags & IP_VS_SVC_F_ONEPACKET)?"ops ":"");
667a5f18 2018 } else {
26ec037f 2019 seq_printf(seq, "FWM %08X %s %s",
05f00505 2020 svc->fwmark, sched_name,
26ec037f 2021 (svc->flags & IP_VS_SVC_F_ONEPACKET)?"ops ":"");
667a5f18 2022 }
1da177e4
LT		 2023
2024 if (svc->flags & IP_VS_SVC_F_PERSISTENT)
2025 seq_printf(seq, "persistent %d %08X\n",
2026 svc->timeout,
2027 ntohl(svc->netmask));
2028 else
2029 seq_putc(seq, '\n');
2030
413c2d04 2031 list_for_each_entry_rcu(dest, &svc->destinations, n_list) {
667a5f18
VB		 2032#ifdef CONFIG_IP_VS_IPV6
2033 if (dest->af == AF_INET6)
2034 seq_printf(seq,
5b095d98 2035 " -> [%pI6]:%04X"
667a5f18 2036 " %-7s %-6d %-10d %-10d\n",
38ff4fa4 2037 &dest->addr.in6,
667a5f18
VB		 2038 ntohs(dest->port),
2039 ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
2040 atomic_read(&dest->weight),
2041 atomic_read(&dest->activeconns),
2042 atomic_read(&dest->inactconns));
2043 else
2044#endif
2045 seq_printf(seq,
2046 " -> %08X:%04X "
2047 "%-7s %-6d %-10d %-10d\n",
2048 ntohl(dest->addr.ip),
2049 ntohs(dest->port),
2050 ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
2051 atomic_read(&dest->weight),
2052 atomic_read(&dest->activeconns),
2053 atomic_read(&dest->inactconns));
2054
1da177e4
LT		 2055 }
2056 }
2057 return 0;
2058}
2059
56b3d975 2060static const struct seq_operations ip_vs_info_seq_ops = {
1da177e4
LT		 2061 .start = ip_vs_info_seq_start,
2062 .next = ip_vs_info_seq_next,
2063 .stop = ip_vs_info_seq_stop,
2064 .show = ip_vs_info_seq_show,
2065};
2066
2067static int ip_vs_info_open(struct inode *inode, struct file *file)
2068{
fc723250 2069 return seq_open_net(inode, file, &ip_vs_info_seq_ops,
cf7732e4 2070 sizeof(struct ip_vs_iter));
1da177e4
LT		 2071}
2072
9a32144e 2073static const struct file_operations ip_vs_info_fops = {
1da177e4
LT		 2074 .owner = THIS_MODULE,
2075 .open = ip_vs_info_open,
2076 .read = seq_read,
2077 .llseek = seq_lseek,
0f08190f 2078 .release = seq_release_net,
1da177e4
LT		 2079};
2080
1da177e4
LT		 2081static int ip_vs_stats_show(struct seq_file *seq, void *v)
2082{
b17fc996 2083 struct net *net = seq_file_single_net(seq);
cd67cd5e 2084 struct ip_vs_kstats show;
1da177e4
LT		 2085
2086/* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2087 seq_puts(seq,
2088 " Total Incoming Outgoing Incoming Outgoing\n");
2089 seq_printf(seq,
2090 " Conns Packets Packets Bytes Bytes\n");
2091
55a3d4e1 2092 ip_vs_copy_stats(&show, &net_ipvs(net)->tot_stats);
cd67cd5e
JA		 2093 seq_printf(seq, "%8LX %8LX %8LX %16LX %16LX\n\n",
2094 (unsigned long long)show.conns,
2095 (unsigned long long)show.inpkts,
2096 (unsigned long long)show.outpkts,
2097 (unsigned long long)show.inbytes,
2098 (unsigned long long)show.outbytes);
2099
2100/* 01234567 01234567 01234567 0123456701234567 0123456701234567*/
1da177e4 2101 seq_puts(seq,
cd67cd5e
JA		 2102 " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
2103 seq_printf(seq, "%8LX %8LX %8LX %16LX %16LX\n",
2104 (unsigned long long)show.cps,
2105 (unsigned long long)show.inpps,
2106 (unsigned long long)show.outpps,
2107 (unsigned long long)show.inbps,
2108 (unsigned long long)show.outbps);
1da177e4
LT		 2109
2110 return 0;
2111}
2112
2113static int ip_vs_stats_seq_open(struct inode *inode, struct file *file)
2114{
fc723250 2115 return single_open_net(inode, file, ip_vs_stats_show);
1da177e4
LT		 2116}
2117
9a32144e 2118static const struct file_operations ip_vs_stats_fops = {
1da177e4
LT		 2119 .owner = THIS_MODULE,
2120 .open = ip_vs_stats_seq_open,
2121 .read = seq_read,
2122 .llseek = seq_lseek,
0f08190f 2123 .release = single_release_net,
1da177e4
LT		 2124};
2125
b17fc996
HS		 2126static int ip_vs_stats_percpu_show(struct seq_file *seq, void *v)
2127{
2128 struct net *net = seq_file_single_net(seq);
2a0751af 2129 struct ip_vs_stats *tot_stats = &net_ipvs(net)->tot_stats;
371990ee 2130 struct ip_vs_cpu_stats __percpu *cpustats = tot_stats->cpustats;
cd67cd5e 2131 struct ip_vs_kstats kstats;
b17fc996
HS		 2132 int i;
2133
2134/* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2135 seq_puts(seq,
2136 " Total Incoming Outgoing Incoming Outgoing\n");
2137 seq_printf(seq,
2138 "CPU Conns Packets Packets Bytes Bytes\n");
2139
2140 for_each_possible_cpu(i) {
2a0751af
JA		 2141 struct ip_vs_cpu_stats *u = per_cpu_ptr(cpustats, i);
2142 unsigned int start;
cd67cd5e 2143 u64 conns, inpkts, outpkts, inbytes, outbytes;
2a0751af
JA		 2144
2145 do {
57a7744e 2146 start = u64_stats_fetch_begin_irq(&u->syncp);
cd67cd5e
JA		 2147 conns = u->cnt.conns;
2148 inpkts = u->cnt.inpkts;
2149 outpkts = u->cnt.outpkts;
2150 inbytes = u->cnt.inbytes;
2151 outbytes = u->cnt.outbytes;
57a7744e 2152 } while (u64_stats_fetch_retry_irq(&u->syncp, start));
2a0751af 2153
cd67cd5e
JA		 2154 seq_printf(seq, "%3X %8LX %8LX %8LX %16LX %16LX\n",
2155 i, (u64)conns, (u64)inpkts,
2156 (u64)outpkts, (u64)inbytes,
2157 (u64)outbytes);
b17fc996
HS		 2158 }
2159
cd67cd5e 2160 ip_vs_copy_stats(&kstats, tot_stats);
ea9f22cc 2161
cd67cd5e
JA		 2162 seq_printf(seq, " ~ %8LX %8LX %8LX %16LX %16LX\n\n",
2163 (unsigned long long)kstats.conns,
2164 (unsigned long long)kstats.inpkts,
2165 (unsigned long long)kstats.outpkts,
2166 (unsigned long long)kstats.inbytes,
2167 (unsigned long long)kstats.outbytes);
ea9f22cc 2168
cd67cd5e 2169/* ... 01234567 01234567 01234567 0123456701234567 0123456701234567 */
b17fc996 2170 seq_puts(seq,
cd67cd5e
JA		 2171 " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
2172 seq_printf(seq, " %8LX %8LX %8LX %16LX %16LX\n",
2173 kstats.cps,
2174 kstats.inpps,
2175 kstats.outpps,
2176 kstats.inbps,
2177 kstats.outbps);
b17fc996
HS		 2178
2179 return 0;
2180}
2181
2182static int ip_vs_stats_percpu_seq_open(struct inode *inode, struct file *file)
2183{
2184 return single_open_net(inode, file, ip_vs_stats_percpu_show);
2185}
2186
2187static const struct file_operations ip_vs_stats_percpu_fops = {
2188 .owner = THIS_MODULE,
2189 .open = ip_vs_stats_percpu_seq_open,
2190 .read = seq_read,
2191 .llseek = seq_lseek,
0f08190f 2192 .release = single_release_net,
b17fc996 2193};
1da177e4
LT		 2194#endif
2195
2196/*
2197 * Set timeout values for tcp tcpfin udp in the timeout_table.
2198 */
9330419d 2199static int ip_vs_set_timeout(struct net *net, struct ip_vs_timeout_user *u)
1da177e4 2200{
091bb34c 2201#if defined(CONFIG_IP_VS_PROTO_TCP) || defined(CONFIG_IP_VS_PROTO_UDP)
9330419d 2202 struct ip_vs_proto_data *pd;
091bb34c 2203#endif
9330419d 2204
1da177e4
LT		 2205 IP_VS_DBG(2, "Setting timeout tcp:%d tcpfin:%d udp:%d\n",
2206 u->tcp_timeout,
2207 u->tcp_fin_timeout,
2208 u->udp_timeout);
2209
2210#ifdef CONFIG_IP_VS_PROTO_TCP
2211 if (u->tcp_timeout) {
9330419d
HS		 2212 pd = ip_vs_proto_data_get(net, IPPROTO_TCP);
2213 pd->timeout_table[IP_VS_TCP_S_ESTABLISHED]
1da177e4
LT		 2214 = u->tcp_timeout * HZ;
2215 }
2216
2217 if (u->tcp_fin_timeout) {
9330419d
HS		 2218 pd = ip_vs_proto_data_get(net, IPPROTO_TCP);
2219 pd->timeout_table[IP_VS_TCP_S_FIN_WAIT]
1da177e4
LT		 2220 = u->tcp_fin_timeout * HZ;
2221 }
2222#endif
2223
2224#ifdef CONFIG_IP_VS_PROTO_UDP
2225 if (u->udp_timeout) {
9330419d
HS		 2226 pd = ip_vs_proto_data_get(net, IPPROTO_UDP);
2227 pd->timeout_table[IP_VS_UDP_S_NORMAL]
1da177e4
LT		 2228 = u->udp_timeout * HZ;
2229 }
2230#endif
2231 return 0;
2232}
2233
5fcf0cf6 2234#define CMDID(cmd) (cmd - IP_VS_BASE_CTL)
1da177e4 2235
5fcf0cf6
JA		 2236struct ip_vs_svcdest_user {
2237 struct ip_vs_service_user s;
2238 struct ip_vs_dest_user d;
1da177e4
LT		 2239};
2240
5fcf0cf6
JA		 2241static const unsigned char set_arglen[CMDID(IP_VS_SO_SET_MAX) + 1] = {
2242 [CMDID(IP_VS_SO_SET_ADD)] = sizeof(struct ip_vs_service_user),
2243 [CMDID(IP_VS_SO_SET_EDIT)] = sizeof(struct ip_vs_service_user),
2244 [CMDID(IP_VS_SO_SET_DEL)] = sizeof(struct ip_vs_service_user),
2245 [CMDID(IP_VS_SO_SET_ADDDEST)] = sizeof(struct ip_vs_svcdest_user),
2246 [CMDID(IP_VS_SO_SET_DELDEST)] = sizeof(struct ip_vs_svcdest_user),
2247 [CMDID(IP_VS_SO_SET_EDITDEST)] = sizeof(struct ip_vs_svcdest_user),
2248 [CMDID(IP_VS_SO_SET_TIMEOUT)] = sizeof(struct ip_vs_timeout_user),
2249 [CMDID(IP_VS_SO_SET_STARTDAEMON)] = sizeof(struct ip_vs_daemon_user),
2250 [CMDID(IP_VS_SO_SET_STOPDAEMON)] = sizeof(struct ip_vs_daemon_user),
2251 [CMDID(IP_VS_SO_SET_ZERO)] = sizeof(struct ip_vs_service_user),
2252};
2253
2254union ip_vs_set_arglen {
2255 struct ip_vs_service_user field_IP_VS_SO_SET_ADD;
2256 struct ip_vs_service_user field_IP_VS_SO_SET_EDIT;
2257 struct ip_vs_service_user field_IP_VS_SO_SET_DEL;
2258 struct ip_vs_svcdest_user field_IP_VS_SO_SET_ADDDEST;
2259 struct ip_vs_svcdest_user field_IP_VS_SO_SET_DELDEST;
2260 struct ip_vs_svcdest_user field_IP_VS_SO_SET_EDITDEST;
2261 struct ip_vs_timeout_user field_IP_VS_SO_SET_TIMEOUT;
2262 struct ip_vs_daemon_user field_IP_VS_SO_SET_STARTDAEMON;
2263 struct ip_vs_daemon_user field_IP_VS_SO_SET_STOPDAEMON;
2264 struct ip_vs_service_user field_IP_VS_SO_SET_ZERO;
2265};
2266
2267#define MAX_SET_ARGLEN sizeof(union ip_vs_set_arglen)
2268
c860c6b1
JV		 2269static void ip_vs_copy_usvc_compat(struct ip_vs_service_user_kern *usvc,
2270 struct ip_vs_service_user *usvc_compat)
2271{
0d1e71b0
SH		 2272 memset(usvc, 0, sizeof(*usvc));
2273
c860c6b1
JV		 2274 usvc->af = AF_INET;
2275 usvc->protocol = usvc_compat->protocol;
2276 usvc->addr.ip = usvc_compat->addr;
2277 usvc->port = usvc_compat->port;
2278 usvc->fwmark = usvc_compat->fwmark;
2279
2280 /* Deep copy of sched_name is not needed here */
2281 usvc->sched_name = usvc_compat->sched_name;
2282
2283 usvc->flags = usvc_compat->flags;
2284 usvc->timeout = usvc_compat->timeout;
2285 usvc->netmask = usvc_compat->netmask;
2286}
2287
2288static void ip_vs_copy_udest_compat(struct ip_vs_dest_user_kern *udest,
2289 struct ip_vs_dest_user *udest_compat)
2290{
0d1e71b0
SH		 2291 memset(udest, 0, sizeof(*udest));
2292
c860c6b1
JV		 2293 udest->addr.ip = udest_compat->addr;
2294 udest->port = udest_compat->port;
2295 udest->conn_flags = udest_compat->conn_flags;
2296 udest->weight = udest_compat->weight;
2297 udest->u_threshold = udest_compat->u_threshold;
2298 udest->l_threshold = udest_compat->l_threshold;
6cff339b 2299 udest->af = AF_INET;
c860c6b1
JV		 2300}
2301
1da177e4
LT		 2302static int
2303do_ip_vs_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len)
2304{
fc723250 2305 struct net *net = sock_net(sk);
1da177e4 2306 int ret;
5fcf0cf6 2307 unsigned char arg[MAX_SET_ARGLEN];
c860c6b1
JV		 2308 struct ip_vs_service_user *usvc_compat;
2309 struct ip_vs_service_user_kern usvc;
1da177e4 2310 struct ip_vs_service *svc;
c860c6b1
JV		 2311 struct ip_vs_dest_user *udest_compat;
2312 struct ip_vs_dest_user_kern udest;
ae1d48b2 2313 struct netns_ipvs *ipvs = net_ipvs(net);
1da177e4 2314
5fcf0cf6 2315 BUILD_BUG_ON(sizeof(arg) > 255);
df008c91 2316 if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
1da177e4
LT		 2317 return -EPERM;
2318
04bcef2a
AV		 2319 if (cmd < IP_VS_BASE_CTL || cmd > IP_VS_SO_SET_MAX)
2320 return -EINVAL;
5fcf0cf6
JA		 2321 if (len != set_arglen[CMDID(cmd)]) {
2322 IP_VS_DBG(1, "set_ctl: len %u != %u\n",
2323 len, set_arglen[CMDID(cmd)]);
1da177e4
LT		 2324 return -EINVAL;
2325 }
2326
2327 if (copy_from_user(arg, user, len) != 0)
2328 return -EFAULT;
2329
2330 /* increase the module use count */
2331 ip_vs_use_count_inc();
2332
ae1d48b2
HS		 2333 /* Handle daemons since they have another lock */
2334 if (cmd == IP_VS_SO_SET_STARTDAEMON ||
2335 cmd == IP_VS_SO_SET_STOPDAEMON) {
2336 struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg;
2337
7926dbfa 2338 mutex_lock(&ipvs->sync_mutex);
ae1d48b2
HS		 2339 if (cmd == IP_VS_SO_SET_STARTDAEMON)
2340 ret = start_sync_thread(net, dm->state, dm->mcast_ifn,
2341 dm->syncid);
2342 else
2343 ret = stop_sync_thread(net, dm->state);
2344 mutex_unlock(&ipvs->sync_mutex);
2345 goto out_dec;
2346 }
2347
7926dbfa 2348 mutex_lock(&__ip_vs_mutex);
1da177e4
LT		 2349 if (cmd == IP_VS_SO_SET_FLUSH) {
2350 /* Flush the virtual service */
578bc3ef 2351 ret = ip_vs_flush(net, false);
1da177e4
LT		 2352 goto out_unlock;
2353 } else if (cmd == IP_VS_SO_SET_TIMEOUT) {
2354 /* Set timeout values for (tcp tcpfin udp) */
9330419d 2355 ret = ip_vs_set_timeout(net, (struct ip_vs_timeout_user *)arg);
1da177e4 2356 goto out_unlock;
1da177e4
LT		 2357 }
2358
c860c6b1
JV		 2359 usvc_compat = (struct ip_vs_service_user *)arg;
2360 udest_compat = (struct ip_vs_dest_user *)(usvc_compat + 1);
2361
2362 /* We only use the new structs internally, so copy userspace compat
2363 * structs to extended internal versions */
2364 ip_vs_copy_usvc_compat(&usvc, usvc_compat);
2365 ip_vs_copy_udest_compat(&udest, udest_compat);
1da177e4
LT		 2366
2367 if (cmd == IP_VS_SO_SET_ZERO) {
2368 /* if no service address is set, zero counters in all */
c860c6b1 2369 if (!usvc.fwmark && !usvc.addr.ip && !usvc.port) {
fc723250 2370 ret = ip_vs_zero_all(net);
1da177e4
LT		 2371 goto out_unlock;
2372 }
2373 }
2374
2906f66a
VMR		 2375 /* Check for valid protocol: TCP or UDP or SCTP, even for fwmark!=0 */
2376 if (usvc.protocol != IPPROTO_TCP && usvc.protocol != IPPROTO_UDP &&
2377 usvc.protocol != IPPROTO_SCTP) {
1e3e238e
HE		 2378 pr_err("set_ctl: invalid protocol: %d %pI4:%d %s\n",
2379 usvc.protocol, &usvc.addr.ip,
2380 ntohs(usvc.port), usvc.sched_name);
1da177e4
LT		 2381 ret = -EFAULT;
2382 goto out_unlock;
2383 }
2384
2385 /* Lookup the exact service by <protocol, addr, port> or fwmark */
ceec4c38 2386 rcu_read_lock();
c860c6b1 2387 if (usvc.fwmark == 0)
fc723250 2388 svc = __ip_vs_service_find(net, usvc.af, usvc.protocol,
26c15cfd 2389 &usvc.addr, usvc.port);
1da177e4 2390 else
fc723250 2391 svc = __ip_vs_svc_fwm_find(net, usvc.af, usvc.fwmark);
ceec4c38 2392 rcu_read_unlock();
1da177e4
LT		 2393
2394 if (cmd != IP_VS_SO_SET_ADD
c860c6b1 2395 && (svc == NULL || svc->protocol != usvc.protocol)) {
1da177e4 2396 ret = -ESRCH;
26c15cfd 2397 goto out_unlock;
1da177e4
LT		 2398 }
2399
2400 switch (cmd) {
2401 case IP_VS_SO_SET_ADD:
2402 if (svc != NULL)
2403 ret = -EEXIST;
2404 else
fc723250 2405 ret = ip_vs_add_service(net, &usvc, &svc);
1da177e4
LT		 2406 break;
2407 case IP_VS_SO_SET_EDIT:
c860c6b1 2408 ret = ip_vs_edit_service(svc, &usvc);
1da177e4
LT		 2409 break;
2410 case IP_VS_SO_SET_DEL:
2411 ret = ip_vs_del_service(svc);
2412 if (!ret)
2413 goto out_unlock;
2414 break;
2415 case IP_VS_SO_SET_ZERO:
2416 ret = ip_vs_zero_service(svc);
2417 break;
2418 case IP_VS_SO_SET_ADDDEST:
c860c6b1 2419 ret = ip_vs_add_dest(svc, &udest);
1da177e4
LT		 2420 break;
2421 case IP_VS_SO_SET_EDITDEST:
c860c6b1 2422 ret = ip_vs_edit_dest(svc, &udest);
1da177e4
LT		 2423 break;
2424 case IP_VS_SO_SET_DELDEST:
c860c6b1 2425 ret = ip_vs_del_dest(svc, &udest);
1da177e4
LT		 2426 break;
2427 default:
2428 ret = -EINVAL;
2429 }
2430
1da177e4 2431 out_unlock:
14cc3e2b 2432 mutex_unlock(&__ip_vs_mutex);
1da177e4
LT		 2433 out_dec:
2434 /* decrease the module use count */
2435 ip_vs_use_count_dec();
2436
2437 return ret;
2438}
2439
2440
1da177e4
LT		 2441static void
2442ip_vs_copy_service(struct ip_vs_service_entry *dst, struct ip_vs_service *src)
2443{
ceec4c38 2444 struct ip_vs_scheduler *sched;
cd67cd5e 2445 struct ip_vs_kstats kstats;
05f00505 2446 char *sched_name;
ceec4c38
JA		 2447
2448 sched = rcu_dereference_protected(src->scheduler, 1);
05f00505 2449 sched_name = sched ? sched->name : "none";
1da177e4 2450 dst->protocol = src->protocol;
e7ade46a 2451 dst->addr = src->addr.ip;
1da177e4
LT		 2452 dst->port = src->port;
2453 dst->fwmark = src->fwmark;
05f00505 2454 strlcpy(dst->sched_name, sched_name, sizeof(dst->sched_name));
1da177e4
LT		 2455 dst->flags = src->flags;
2456 dst->timeout = src->timeout / HZ;
2457 dst->netmask = src->netmask;
2458 dst->num_dests = src->num_dests;
cd67cd5e
JA		 2459 ip_vs_copy_stats(&kstats, &src->stats);
2460 ip_vs_export_stats_user(&dst->stats, &kstats);
1da177e4
LT		 2461}
2462
2463static inline int
fc723250
HS		 2464__ip_vs_get_service_entries(struct net *net,
2465 const struct ip_vs_get_services *get,
1da177e4
LT		 2466 struct ip_vs_get_services __user *uptr)
2467{
2468 int idx, count=0;
2469 struct ip_vs_service *svc;
2470 struct ip_vs_service_entry entry;
2471 int ret = 0;
2472
2473 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38 2474 hlist_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
f94fd041 2475 /* Only expose IPv4 entries to old interface */
fc723250 2476 if (svc->af != AF_INET || !net_eq(svc->net, net))
f94fd041
JV		 2477 continue;
2478
1da177e4
LT		 2479 if (count >= get->num_services)
2480 goto out;
4da62fc7 2481 memset(&entry, 0, sizeof(entry));
1da177e4
LT		 2482 ip_vs_copy_service(&entry, svc);
2483 if (copy_to_user(&uptr->entrytable[count],
2484 &entry, sizeof(entry))) {
2485 ret = -EFAULT;
2486 goto out;
2487 }
2488 count++;
2489 }
2490 }
2491
2492 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38 2493 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
f94fd041 2494 /* Only expose IPv4 entries to old interface */
fc723250 2495 if (svc->af != AF_INET || !net_eq(svc->net, net))
f94fd041
JV		 2496 continue;
2497
1da177e4
LT		 2498 if (count >= get->num_services)
2499 goto out;
4da62fc7 2500 memset(&entry, 0, sizeof(entry));
1da177e4
LT		 2501 ip_vs_copy_service(&entry, svc);
2502 if (copy_to_user(&uptr->entrytable[count],
2503 &entry, sizeof(entry))) {
2504 ret = -EFAULT;
2505 goto out;
2506 }
2507 count++;
2508 }
2509 }
552ad65a 2510out:
1da177e4
LT		 2511 return ret;
2512}
2513
2514static inline int
fc723250 2515__ip_vs_get_dest_entries(struct net *net, const struct ip_vs_get_dests *get,
1da177e4
LT		 2516 struct ip_vs_get_dests __user *uptr)
2517{
2518 struct ip_vs_service *svc;
b18610de 2519 union nf_inet_addr addr = { .ip = get->addr };
1da177e4
LT		 2520 int ret = 0;
2521
ceec4c38 2522 rcu_read_lock();
1da177e4 2523 if (get->fwmark)
fc723250 2524 svc = __ip_vs_svc_fwm_find(net, AF_INET, get->fwmark);
1da177e4 2525 else
fc723250 2526 svc = __ip_vs_service_find(net, AF_INET, get->protocol, &addr,
26c15cfd 2527 get->port);
ceec4c38 2528 rcu_read_unlock();
b18610de 2529
1da177e4
LT		 2530 if (svc) {
2531 int count = 0;
2532 struct ip_vs_dest *dest;
2533 struct ip_vs_dest_entry entry;
cd67cd5e 2534 struct ip_vs_kstats kstats;
1da177e4 2535
a8241c63 2536 memset(&entry, 0, sizeof(entry));
1da177e4
LT		 2537 list_for_each_entry(dest, &svc->destinations, n_list) {
2538 if (count >= get->num_dests)
2539 break;
2540
6cff339b
AG		 2541 /* Cannot expose heterogeneous members via sockopt
2542 * interface
2543 */
2544 if (dest->af != svc->af)
2545 continue;
2546
e7ade46a 2547 entry.addr = dest->addr.ip;
1da177e4
LT		 2548 entry.port = dest->port;
2549 entry.conn_flags = atomic_read(&dest->conn_flags);
2550 entry.weight = atomic_read(&dest->weight);
2551 entry.u_threshold = dest->u_threshold;
2552 entry.l_threshold = dest->l_threshold;
2553 entry.activeconns = atomic_read(&dest->activeconns);
2554 entry.inactconns = atomic_read(&dest->inactconns);
2555 entry.persistconns = atomic_read(&dest->persistconns);
cd67cd5e
JA		 2556 ip_vs_copy_stats(&kstats, &dest->stats);
2557 ip_vs_export_stats_user(&entry.stats, &kstats);
1da177e4
LT		 2558 if (copy_to_user(&uptr->entrytable[count],
2559 &entry, sizeof(entry))) {
2560 ret = -EFAULT;
2561 break;
2562 }
2563 count++;
2564 }
1da177e4
LT		 2565 } else
2566 ret = -ESRCH;
2567 return ret;
2568}
2569
2570static inline void
9330419d 2571__ip_vs_get_timeouts(struct net *net, struct ip_vs_timeout_user *u)
1da177e4 2572{
091bb34c 2573#if defined(CONFIG_IP_VS_PROTO_TCP) || defined(CONFIG_IP_VS_PROTO_UDP)
9330419d 2574 struct ip_vs_proto_data *pd;
091bb34c 2575#endif
9330419d 2576
b61a602e
AB		 2577 memset(u, 0, sizeof (*u));
2578
1da177e4 2579#ifdef CONFIG_IP_VS_PROTO_TCP
9330419d
HS		 2580 pd = ip_vs_proto_data_get(net, IPPROTO_TCP);
2581 u->tcp_timeout = pd->timeout_table[IP_VS_TCP_S_ESTABLISHED] / HZ;
2582 u->tcp_fin_timeout = pd->timeout_table[IP_VS_TCP_S_FIN_WAIT] / HZ;
1da177e4
LT		 2583#endif
2584#ifdef CONFIG_IP_VS_PROTO_UDP
9330419d 2585 pd = ip_vs_proto_data_get(net, IPPROTO_UDP);
1da177e4 2586 u->udp_timeout =
9330419d 2587 pd->timeout_table[IP_VS_UDP_S_NORMAL] / HZ;
1da177e4
LT		 2588#endif
2589}
2590
5fcf0cf6
JA		 2591static const unsigned char get_arglen[CMDID(IP_VS_SO_GET_MAX) + 1] = {
2592 [CMDID(IP_VS_SO_GET_VERSION)] = 64,
2593 [CMDID(IP_VS_SO_GET_INFO)] = sizeof(struct ip_vs_getinfo),
2594 [CMDID(IP_VS_SO_GET_SERVICES)] = sizeof(struct ip_vs_get_services),
2595 [CMDID(IP_VS_SO_GET_SERVICE)] = sizeof(struct ip_vs_service_entry),
2596 [CMDID(IP_VS_SO_GET_DESTS)] = sizeof(struct ip_vs_get_dests),
2597 [CMDID(IP_VS_SO_GET_TIMEOUT)] = sizeof(struct ip_vs_timeout_user),
2598 [CMDID(IP_VS_SO_GET_DAEMON)] = 2 * sizeof(struct ip_vs_daemon_user),
2599};
1da177e4 2600
5fcf0cf6
JA		 2601union ip_vs_get_arglen {
2602 char field_IP_VS_SO_GET_VERSION[64];
2603 struct ip_vs_getinfo field_IP_VS_SO_GET_INFO;
2604 struct ip_vs_get_services field_IP_VS_SO_GET_SERVICES;
2605 struct ip_vs_service_entry field_IP_VS_SO_GET_SERVICE;
2606 struct ip_vs_get_dests field_IP_VS_SO_GET_DESTS;
2607 struct ip_vs_timeout_user field_IP_VS_SO_GET_TIMEOUT;
2608 struct ip_vs_daemon_user field_IP_VS_SO_GET_DAEMON[2];
1da177e4
LT		 2609};
2610
5fcf0cf6
JA		 2611#define MAX_GET_ARGLEN sizeof(union ip_vs_get_arglen)
2612
1da177e4
LT		 2613static int
2614do_ip_vs_get_ctl(struct sock *sk, int cmd, void __user *user, int *len)
2615{
5fcf0cf6 2616 unsigned char arg[MAX_GET_ARGLEN];
1da177e4 2617 int ret = 0;
04bcef2a 2618 unsigned int copylen;
fc723250 2619 struct net *net = sock_net(sk);
f131315f 2620 struct netns_ipvs *ipvs = net_ipvs(net);
1da177e4 2621
fc723250 2622 BUG_ON(!net);
5fcf0cf6 2623 BUILD_BUG_ON(sizeof(arg) > 255);
df008c91 2624 if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
1da177e4
LT		 2625 return -EPERM;
2626
04bcef2a
AV		 2627 if (cmd < IP_VS_BASE_CTL || cmd > IP_VS_SO_GET_MAX)
2628 return -EINVAL;
2629
5fcf0cf6
JA		 2630 copylen = get_arglen[CMDID(cmd)];
2631 if (*len < (int) copylen) {
2632 IP_VS_DBG(1, "get_ctl: len %d < %u\n", *len, copylen);
1da177e4
LT		 2633 return -EINVAL;
2634 }
2635
04bcef2a 2636 if (copy_from_user(arg, user, copylen) != 0)
1da177e4 2637 return -EFAULT;
ae1d48b2
HS		 2638 /*
2639 * Handle daemons first since it has its own locking
2640 */
2641 if (cmd == IP_VS_SO_GET_DAEMON) {
2642 struct ip_vs_daemon_user d[2];
2643
2644 memset(&d, 0, sizeof(d));
7926dbfa 2645 mutex_lock(&ipvs->sync_mutex);
ae1d48b2
HS		 2646 if (ipvs->sync_state & IP_VS_STATE_MASTER) {
2647 d[0].state = IP_VS_STATE_MASTER;
2648 strlcpy(d[0].mcast_ifn, ipvs->master_mcast_ifn,
2649 sizeof(d[0].mcast_ifn));
2650 d[0].syncid = ipvs->master_syncid;
2651 }
2652 if (ipvs->sync_state & IP_VS_STATE_BACKUP) {
2653 d[1].state = IP_VS_STATE_BACKUP;
2654 strlcpy(d[1].mcast_ifn, ipvs->backup_mcast_ifn,
2655 sizeof(d[1].mcast_ifn));
2656 d[1].syncid = ipvs->backup_syncid;
2657 }
2658 if (copy_to_user(user, &d, sizeof(d)) != 0)
2659 ret = -EFAULT;
2660 mutex_unlock(&ipvs->sync_mutex);
2661 return ret;
2662 }
1da177e4 2663
7926dbfa 2664 mutex_lock(&__ip_vs_mutex);
1da177e4
LT		 2665 switch (cmd) {
2666 case IP_VS_SO_GET_VERSION:
2667 {
2668 char buf[64];
2669
2670 sprintf(buf, "IP Virtual Server version %d.%d.%d (size=%d)",
6f7edb48 2671 NVERSION(IP_VS_VERSION_CODE), ip_vs_conn_tab_size);
1da177e4
LT		 2672 if (copy_to_user(user, buf, strlen(buf)+1) != 0) {
2673 ret = -EFAULT;
2674 goto out;
2675 }
2676 *len = strlen(buf)+1;
2677 }
2678 break;
2679
2680 case IP_VS_SO_GET_INFO:
2681 {
2682 struct ip_vs_getinfo info;
2683 info.version = IP_VS_VERSION_CODE;
6f7edb48 2684 info.size = ip_vs_conn_tab_size;
a0840e2e 2685 info.num_services = ipvs->num_services;
1da177e4
LT		 2686 if (copy_to_user(user, &info, sizeof(info)) != 0)
2687 ret = -EFAULT;
2688 }
2689 break;
2690
2691 case IP_VS_SO_GET_SERVICES:
2692 {
2693 struct ip_vs_get_services *get;
2694 int size;
2695
2696 get = (struct ip_vs_get_services *)arg;
2697 size = sizeof(*get) +
2698 sizeof(struct ip_vs_service_entry) * get->num_services;
2699 if (*len != size) {
1e3e238e 2700 pr_err("length: %u != %u\n", *len, size);
1da177e4
LT		 2701 ret = -EINVAL;
2702 goto out;
2703 }
fc723250 2704 ret = __ip_vs_get_service_entries(net, get, user);
1da177e4
LT		 2705 }
2706 break;
2707
2708 case IP_VS_SO_GET_SERVICE:
2709 {
2710 struct ip_vs_service_entry *entry;
2711 struct ip_vs_service *svc;
b18610de 2712 union nf_inet_addr addr;
1da177e4
LT		 2713
2714 entry = (struct ip_vs_service_entry *)arg;
b18610de 2715 addr.ip = entry->addr;
ceec4c38 2716 rcu_read_lock();
1da177e4 2717 if (entry->fwmark)
fc723250 2718 svc = __ip_vs_svc_fwm_find(net, AF_INET, entry->fwmark);
1da177e4 2719 else
fc723250
HS		 2720 svc = __ip_vs_service_find(net, AF_INET,
2721 entry->protocol, &addr,
2722 entry->port);
ceec4c38 2723 rcu_read_unlock();
1da177e4
LT		 2724 if (svc) {
2725 ip_vs_copy_service(entry, svc);
2726 if (copy_to_user(user, entry, sizeof(*entry)) != 0)
2727 ret = -EFAULT;
1da177e4
LT		 2728 } else
2729 ret = -ESRCH;
2730 }
2731 break;
2732
2733 case IP_VS_SO_GET_DESTS:
2734 {
2735 struct ip_vs_get_dests *get;
2736 int size;
2737
2738 get = (struct ip_vs_get_dests *)arg;
2739 size = sizeof(*get) +
2740 sizeof(struct ip_vs_dest_entry) * get->num_dests;
2741 if (*len != size) {
1e3e238e 2742 pr_err("length: %u != %u\n", *len, size);
1da177e4
LT		 2743 ret = -EINVAL;
2744 goto out;
2745 }
fc723250 2746 ret = __ip_vs_get_dest_entries(net, get, user);
1da177e4
LT		 2747 }
2748 break;
2749
2750 case IP_VS_SO_GET_TIMEOUT:
2751 {
2752 struct ip_vs_timeout_user t;
2753
9330419d 2754 __ip_vs_get_timeouts(net, &t);
1da177e4
LT		 2755 if (copy_to_user(user, &t, sizeof(t)) != 0)
2756 ret = -EFAULT;
2757 }
2758 break;
2759
1da177e4
LT		 2760 default:
2761 ret = -EINVAL;
2762 }
2763
552ad65a 2764out:
14cc3e2b 2765 mutex_unlock(&__ip_vs_mutex);
1da177e4
LT		 2766 return ret;
2767}
2768
2769
2770static struct nf_sockopt_ops ip_vs_sockopts = {
2771 .pf = PF_INET,
2772 .set_optmin = IP_VS_BASE_CTL,
2773 .set_optmax = IP_VS_SO_SET_MAX+1,
2774 .set = do_ip_vs_set_ctl,
2775 .get_optmin = IP_VS_BASE_CTL,
2776 .get_optmax = IP_VS_SO_GET_MAX+1,
2777 .get = do_ip_vs_get_ctl,
16fcec35 2778 .owner = THIS_MODULE,
1da177e4
LT		 2779};
2780
9a812198
JV		 2781/*
2782 * Generic Netlink interface
2783 */
2784
2785/* IPVS genetlink family */
2786static struct genl_family ip_vs_genl_family = {
2787 .id = GENL_ID_GENERATE,
2788 .hdrsize = 0,
2789 .name = IPVS_GENL_NAME,
2790 .version = IPVS_GENL_VERSION,
2791 .maxattr = IPVS_CMD_MAX,
c6d2d445 2792 .netnsok = true, /* Make ipvsadm to work on netns */
9a812198
JV		 2793};
2794
2795/* Policy used for first-level command attributes */
2796static const struct nla_policy ip_vs_cmd_policy[IPVS_CMD_ATTR_MAX + 1] = {
2797 [IPVS_CMD_ATTR_SERVICE] = { .type = NLA_NESTED },
2798 [IPVS_CMD_ATTR_DEST] = { .type = NLA_NESTED },
2799 [IPVS_CMD_ATTR_DAEMON] = { .type = NLA_NESTED },
2800 [IPVS_CMD_ATTR_TIMEOUT_TCP] = { .type = NLA_U32 },
2801 [IPVS_CMD_ATTR_TIMEOUT_TCP_FIN] = { .type = NLA_U32 },
2802 [IPVS_CMD_ATTR_TIMEOUT_UDP] = { .type = NLA_U32 },
2803};
2804
2805/* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DAEMON */
2806static const struct nla_policy ip_vs_daemon_policy[IPVS_DAEMON_ATTR_MAX + 1] = {
2807 [IPVS_DAEMON_ATTR_STATE] = { .type = NLA_U32 },
2808 [IPVS_DAEMON_ATTR_MCAST_IFN] = { .type = NLA_NUL_STRING,
2809 .len = IP_VS_IFNAME_MAXLEN },
2810 [IPVS_DAEMON_ATTR_SYNC_ID] = { .type = NLA_U32 },
2811};
2812
2813/* Policy used for attributes in nested attribute IPVS_CMD_ATTR_SERVICE */
2814static const struct nla_policy ip_vs_svc_policy[IPVS_SVC_ATTR_MAX + 1] = {
2815 [IPVS_SVC_ATTR_AF] = { .type = NLA_U16 },
2816 [IPVS_SVC_ATTR_PROTOCOL] = { .type = NLA_U16 },
2817 [IPVS_SVC_ATTR_ADDR] = { .type = NLA_BINARY,
2818 .len = sizeof(union nf_inet_addr) },
2819 [IPVS_SVC_ATTR_PORT] = { .type = NLA_U16 },
2820 [IPVS_SVC_ATTR_FWMARK] = { .type = NLA_U32 },
2821 [IPVS_SVC_ATTR_SCHED_NAME] = { .type = NLA_NUL_STRING,
2822 .len = IP_VS_SCHEDNAME_MAXLEN },
0d1e71b0
SH		 2823 [IPVS_SVC_ATTR_PE_NAME] = { .type = NLA_NUL_STRING,
2824 .len = IP_VS_PENAME_MAXLEN },
9a812198
JV		 2825 [IPVS_SVC_ATTR_FLAGS] = { .type = NLA_BINARY,
2826 .len = sizeof(struct ip_vs_flags) },
2827 [IPVS_SVC_ATTR_TIMEOUT] = { .type = NLA_U32 },
2828 [IPVS_SVC_ATTR_NETMASK] = { .type = NLA_U32 },
2829 [IPVS_SVC_ATTR_STATS] = { .type = NLA_NESTED },
2830};
2831
2832/* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DEST */
2833static const struct nla_policy ip_vs_dest_policy[IPVS_DEST_ATTR_MAX + 1] = {
2834 [IPVS_DEST_ATTR_ADDR] = { .type = NLA_BINARY,
2835 .len = sizeof(union nf_inet_addr) },
2836 [IPVS_DEST_ATTR_PORT] = { .type = NLA_U16 },
2837 [IPVS_DEST_ATTR_FWD_METHOD] = { .type = NLA_U32 },
2838 [IPVS_DEST_ATTR_WEIGHT] = { .type = NLA_U32 },
2839 [IPVS_DEST_ATTR_U_THRESH] = { .type = NLA_U32 },
2840 [IPVS_DEST_ATTR_L_THRESH] = { .type = NLA_U32 },
2841 [IPVS_DEST_ATTR_ACTIVE_CONNS] = { .type = NLA_U32 },
2842 [IPVS_DEST_ATTR_INACT_CONNS] = { .type = NLA_U32 },
2843 [IPVS_DEST_ATTR_PERSIST_CONNS] = { .type = NLA_U32 },
2844 [IPVS_DEST_ATTR_STATS] = { .type = NLA_NESTED },
6cff339b 2845 [IPVS_DEST_ATTR_ADDR_FAMILY] = { .type = NLA_U16 },
9a812198
JV		 2846};
2847
2848static int ip_vs_genl_fill_stats(struct sk_buff *skb, int container_type,
cd67cd5e
JA		 2849 struct ip_vs_kstats *kstats)
2850{
2851 struct nlattr *nl_stats = nla_nest_start(skb, container_type);
2852
2853 if (!nl_stats)
2854 return -EMSGSIZE;
2855
2856 if (nla_put_u32(skb, IPVS_STATS_ATTR_CONNS, (u32)kstats->conns) ||
2857 nla_put_u32(skb, IPVS_STATS_ATTR_INPKTS, (u32)kstats->inpkts) ||
2858 nla_put_u32(skb, IPVS_STATS_ATTR_OUTPKTS, (u32)kstats->outpkts) ||
2859 nla_put_u64(skb, IPVS_STATS_ATTR_INBYTES, kstats->inbytes) ||
2860 nla_put_u64(skb, IPVS_STATS_ATTR_OUTBYTES, kstats->outbytes) ||
2861 nla_put_u32(skb, IPVS_STATS_ATTR_CPS, (u32)kstats->cps) ||
2862 nla_put_u32(skb, IPVS_STATS_ATTR_INPPS, (u32)kstats->inpps) ||
2863 nla_put_u32(skb, IPVS_STATS_ATTR_OUTPPS, (u32)kstats->outpps) ||
2864 nla_put_u32(skb, IPVS_STATS_ATTR_INBPS, (u32)kstats->inbps) ||
2865 nla_put_u32(skb, IPVS_STATS_ATTR_OUTBPS, (u32)kstats->outbps))
2866 goto nla_put_failure;
2867 nla_nest_end(skb, nl_stats);
2868
2869 return 0;
2870
2871nla_put_failure:
2872 nla_nest_cancel(skb, nl_stats);
2873 return -EMSGSIZE;
2874}
2875
2876static int ip_vs_genl_fill_stats64(struct sk_buff *skb, int container_type,
2877 struct ip_vs_kstats *kstats)
9a812198
JV		 2878{
2879 struct nlattr *nl_stats = nla_nest_start(skb, container_type);
cd67cd5e 2880
9a812198
JV		 2881 if (!nl_stats)
2882 return -EMSGSIZE;
2883
cd67cd5e
JA		 2884 if (nla_put_u64(skb, IPVS_STATS_ATTR_CONNS, kstats->conns) ||
2885 nla_put_u64(skb, IPVS_STATS_ATTR_INPKTS, kstats->inpkts) ||
2886 nla_put_u64(skb, IPVS_STATS_ATTR_OUTPKTS, kstats->outpkts) ||
2887 nla_put_u64(skb, IPVS_STATS_ATTR_INBYTES, kstats->inbytes) ||
2888 nla_put_u64(skb, IPVS_STATS_ATTR_OUTBYTES, kstats->outbytes) ||
2889 nla_put_u64(skb, IPVS_STATS_ATTR_CPS, kstats->cps) ||
2890 nla_put_u64(skb, IPVS_STATS_ATTR_INPPS, kstats->inpps) ||
2891 nla_put_u64(skb, IPVS_STATS_ATTR_OUTPPS, kstats->outpps) ||
2892 nla_put_u64(skb, IPVS_STATS_ATTR_INBPS, kstats->inbps) ||
2893 nla_put_u64(skb, IPVS_STATS_ATTR_OUTBPS, kstats->outbps))
969e8e25 2894 goto nla_put_failure;
9a812198
JV		 2895 nla_nest_end(skb, nl_stats);
2896
2897 return 0;
2898
2899nla_put_failure:
9a812198
JV		 2900 nla_nest_cancel(skb, nl_stats);
2901 return -EMSGSIZE;
2902}
2903
2904static int ip_vs_genl_fill_service(struct sk_buff *skb,
2905 struct ip_vs_service *svc)
2906{
ceec4c38 2907 struct ip_vs_scheduler *sched;
371990ee 2908 struct ip_vs_pe *pe;
9a812198
JV		 2909 struct nlattr *nl_service;
2910 struct ip_vs_flags flags = { .flags = svc->flags,
2911 .mask = ~0 };
cd67cd5e 2912 struct ip_vs_kstats kstats;
05f00505 2913 char *sched_name;
9a812198
JV		 2914
2915 nl_service = nla_nest_start(skb, IPVS_CMD_ATTR_SERVICE);
2916 if (!nl_service)
2917 return -EMSGSIZE;
2918
969e8e25
DM		 2919 if (nla_put_u16(skb, IPVS_SVC_ATTR_AF, svc->af))
2920 goto nla_put_failure;
9a812198 2921 if (svc->fwmark) {
969e8e25
DM		 2922 if (nla_put_u32(skb, IPVS_SVC_ATTR_FWMARK, svc->fwmark))
2923 goto nla_put_failure;
9a812198 2924 } else {
969e8e25
DM		 2925 if (nla_put_u16(skb, IPVS_SVC_ATTR_PROTOCOL, svc->protocol) ||
2926 nla_put(skb, IPVS_SVC_ATTR_ADDR, sizeof(svc->addr), &svc->addr) ||
0a925864 2927 nla_put_be16(skb, IPVS_SVC_ATTR_PORT, svc->port))
969e8e25 2928 goto nla_put_failure;
9a812198
JV		 2929 }
2930
ceec4c38 2931 sched = rcu_dereference_protected(svc->scheduler, 1);
05f00505 2932 sched_name = sched ? sched->name : "none";
371990ee 2933 pe = rcu_dereference_protected(svc->pe, 1);
05f00505 2934 if (nla_put_string(skb, IPVS_SVC_ATTR_SCHED_NAME, sched_name) ||
371990ee 2935 (pe && nla_put_string(skb, IPVS_SVC_ATTR_PE_NAME, pe->name)) ||
969e8e25
DM		 2936 nla_put(skb, IPVS_SVC_ATTR_FLAGS, sizeof(flags), &flags) ||
2937 nla_put_u32(skb, IPVS_SVC_ATTR_TIMEOUT, svc->timeout / HZ) ||
0a925864 2938 nla_put_be32(skb, IPVS_SVC_ATTR_NETMASK, svc->netmask))
969e8e25 2939 goto nla_put_failure;
cd67cd5e
JA		 2940 ip_vs_copy_stats(&kstats, &svc->stats);
2941 if (ip_vs_genl_fill_stats(skb, IPVS_SVC_ATTR_STATS, &kstats))
2942 goto nla_put_failure;
2943 if (ip_vs_genl_fill_stats64(skb, IPVS_SVC_ATTR_STATS64, &kstats))
9a812198
JV		 2944 goto nla_put_failure;
2945
2946 nla_nest_end(skb, nl_service);
2947
2948 return 0;
2949
2950nla_put_failure:
2951 nla_nest_cancel(skb, nl_service);
2952 return -EMSGSIZE;
2953}
2954
2955static int ip_vs_genl_dump_service(struct sk_buff *skb,
2956 struct ip_vs_service *svc,
2957 struct netlink_callback *cb)
2958{
2959 void *hdr;
2960
15e47304 2961 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
9a812198
JV		 2962 &ip_vs_genl_family, NLM_F_MULTI,
2963 IPVS_CMD_NEW_SERVICE);
2964 if (!hdr)
2965 return -EMSGSIZE;
2966
2967 if (ip_vs_genl_fill_service(skb, svc) < 0)
2968 goto nla_put_failure;
2969
053c095a
JB		 2970 genlmsg_end(skb, hdr);
2971 return 0;
9a812198
JV		 2972
2973nla_put_failure:
2974 genlmsg_cancel(skb, hdr);
2975 return -EMSGSIZE;
2976}
2977
2978static int ip_vs_genl_dump_services(struct sk_buff *skb,
2979 struct netlink_callback *cb)
2980{
2981 int idx = 0, i;
2982 int start = cb->args[0];
2983 struct ip_vs_service *svc;
fc723250 2984 struct net *net = skb_sknet(skb);
9a812198
JV		 2985
2986 mutex_lock(&__ip_vs_mutex);
2987 for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) {
ceec4c38 2988 hlist_for_each_entry(svc, &ip_vs_svc_table[i], s_list) {
fc723250 2989 if (++idx <= start || !net_eq(svc->net, net))
9a812198
JV		 2990 continue;
2991 if (ip_vs_genl_dump_service(skb, svc, cb) < 0) {
2992 idx--;
2993 goto nla_put_failure;
2994 }
2995 }
2996 }
2997
2998 for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) {
ceec4c38 2999 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[i], f_list) {
fc723250 3000 if (++idx <= start || !net_eq(svc->net, net))
9a812198
JV		 3001 continue;
3002 if (ip_vs_genl_dump_service(skb, svc, cb) < 0) {
3003 idx--;
3004 goto nla_put_failure;
3005 }
3006 }
3007 }
3008
3009nla_put_failure:
3010 mutex_unlock(&__ip_vs_mutex);
3011 cb->args[0] = idx;
3012
3013 return skb->len;
3014}
3015
fc723250
HS		 3016static int ip_vs_genl_parse_service(struct net *net,
3017 struct ip_vs_service_user_kern *usvc,
26c15cfd
JA		 3018 struct nlattr *nla, int full_entry,
3019 struct ip_vs_service **ret_svc)
9a812198
JV		 3020{
3021 struct nlattr *attrs[IPVS_SVC_ATTR_MAX + 1];
3022 struct nlattr *nla_af, *nla_port, *nla_fwmark, *nla_protocol, *nla_addr;
26c15cfd 3023 struct ip_vs_service *svc;
9a812198
JV		 3024
3025 /* Parse mandatory identifying service fields first */
3026 if (nla == NULL ||
3027 nla_parse_nested(attrs, IPVS_SVC_ATTR_MAX, nla, ip_vs_svc_policy))
3028 return -EINVAL;
3029
3030 nla_af = attrs[IPVS_SVC_ATTR_AF];
3031 nla_protocol = attrs[IPVS_SVC_ATTR_PROTOCOL];
3032 nla_addr = attrs[IPVS_SVC_ATTR_ADDR];
3033 nla_port = attrs[IPVS_SVC_ATTR_PORT];
3034 nla_fwmark = attrs[IPVS_SVC_ATTR_FWMARK];
3035
3036 if (!(nla_af && (nla_fwmark || (nla_port && nla_protocol && nla_addr))))
3037 return -EINVAL;
3038
258c8893
SH		 3039 memset(usvc, 0, sizeof(*usvc));
3040
c860c6b1 3041 usvc->af = nla_get_u16(nla_af);
f94fd041
JV		 3042#ifdef CONFIG_IP_VS_IPV6
3043 if (usvc->af != AF_INET && usvc->af != AF_INET6)
3044#else
3045 if (usvc->af != AF_INET)
3046#endif
9a812198
JV		 3047 return -EAFNOSUPPORT;
3048
3049 if (nla_fwmark) {
3050 usvc->protocol = IPPROTO_TCP;
3051 usvc->fwmark = nla_get_u32(nla_fwmark);
3052 } else {
3053 usvc->protocol = nla_get_u16(nla_protocol);
3054 nla_memcpy(&usvc->addr, nla_addr, sizeof(usvc->addr));
0a925864 3055 usvc->port = nla_get_be16(nla_port);
9a812198
JV		 3056 usvc->fwmark = 0;
3057 }
3058
ceec4c38 3059 rcu_read_lock();
26c15cfd 3060 if (usvc->fwmark)
fc723250 3061 svc = __ip_vs_svc_fwm_find(net, usvc->af, usvc->fwmark);
26c15cfd 3062 else
fc723250 3063 svc = __ip_vs_service_find(net, usvc->af, usvc->protocol,
26c15cfd 3064 &usvc->addr, usvc->port);
ceec4c38 3065 rcu_read_unlock();
26c15cfd
JA		 3066 *ret_svc = svc;
3067
9a812198
JV		 3068 /* If a full entry was requested, check for the additional fields */
3069 if (full_entry) {
0d1e71b0 3070 struct nlattr *nla_sched, *nla_flags, *nla_pe, *nla_timeout,
9a812198
JV		 3071 *nla_netmask;
3072 struct ip_vs_flags flags;
9a812198
JV		 3073
3074 nla_sched = attrs[IPVS_SVC_ATTR_SCHED_NAME];
0d1e71b0 3075 nla_pe = attrs[IPVS_SVC_ATTR_PE_NAME];
9a812198
JV		 3076 nla_flags = attrs[IPVS_SVC_ATTR_FLAGS];
3077 nla_timeout = attrs[IPVS_SVC_ATTR_TIMEOUT];
3078 nla_netmask = attrs[IPVS_SVC_ATTR_NETMASK];
3079
3080 if (!(nla_sched && nla_flags && nla_timeout && nla_netmask))
3081 return -EINVAL;
3082
3083 nla_memcpy(&flags, nla_flags, sizeof(flags));
3084
3085 /* prefill flags from service if it already exists */
26c15cfd 3086 if (svc)
9a812198 3087 usvc->flags = svc->flags;
9a812198
JV		 3088
3089 /* set new flags from userland */
3090 usvc->flags = (usvc->flags & ~flags.mask) |
3091 (flags.flags & flags.mask);
c860c6b1 3092 usvc->sched_name = nla_data(nla_sched);
0d1e71b0 3093 usvc->pe_name = nla_pe ? nla_data(nla_pe) : NULL;
9a812198 3094 usvc->timeout = nla_get_u32(nla_timeout);
0a925864 3095 usvc->netmask = nla_get_be32(nla_netmask);
9a812198
JV		 3096 }
3097
3098 return 0;
3099}
3100
fc723250
HS		 3101static struct ip_vs_service *ip_vs_genl_find_service(struct net *net,
3102 struct nlattr *nla)
9a812198 3103{
c860c6b1 3104 struct ip_vs_service_user_kern usvc;
26c15cfd 3105 struct ip_vs_service *svc;
9a812198
JV		 3106 int ret;
3107
fc723250 3108 ret = ip_vs_genl_parse_service(net, &usvc, nla, 0, &svc);
26c15cfd 3109 return ret ? ERR_PTR(ret) : svc;
9a812198
JV		 3110}
3111
3112static int ip_vs_genl_fill_dest(struct sk_buff *skb, struct ip_vs_dest *dest)
3113{
3114 struct nlattr *nl_dest;
cd67cd5e 3115 struct ip_vs_kstats kstats;
9a812198
JV		 3116
3117 nl_dest = nla_nest_start(skb, IPVS_CMD_ATTR_DEST);
3118 if (!nl_dest)
3119 return -EMSGSIZE;
3120
969e8e25 3121 if (nla_put(skb, IPVS_DEST_ATTR_ADDR, sizeof(dest->addr), &dest->addr) ||
0a925864 3122 nla_put_be16(skb, IPVS_DEST_ATTR_PORT, dest->port) ||
969e8e25
DM		 3123 nla_put_u32(skb, IPVS_DEST_ATTR_FWD_METHOD,
3124 (atomic_read(&dest->conn_flags) &
3125 IP_VS_CONN_F_FWD_MASK)) ||
3126 nla_put_u32(skb, IPVS_DEST_ATTR_WEIGHT,
3127 atomic_read(&dest->weight)) ||
3128 nla_put_u32(skb, IPVS_DEST_ATTR_U_THRESH, dest->u_threshold) ||
3129 nla_put_u32(skb, IPVS_DEST_ATTR_L_THRESH, dest->l_threshold) ||
3130 nla_put_u32(skb, IPVS_DEST_ATTR_ACTIVE_CONNS,
3131 atomic_read(&dest->activeconns)) ||
3132 nla_put_u32(skb, IPVS_DEST_ATTR_INACT_CONNS,
3133 atomic_read(&dest->inactconns)) ||
3134 nla_put_u32(skb, IPVS_DEST_ATTR_PERSIST_CONNS,
6cff339b
AG		 3135 atomic_read(&dest->persistconns)) ||
3136 nla_put_u16(skb, IPVS_DEST_ATTR_ADDR_FAMILY, dest->af))
969e8e25 3137 goto nla_put_failure;
cd67cd5e
JA		 3138 ip_vs_copy_stats(&kstats, &dest->stats);
3139 if (ip_vs_genl_fill_stats(skb, IPVS_DEST_ATTR_STATS, &kstats))
3140 goto nla_put_failure;
3141 if (ip_vs_genl_fill_stats64(skb, IPVS_DEST_ATTR_STATS64, &kstats))
9a812198
JV		 3142 goto nla_put_failure;
3143
3144 nla_nest_end(skb, nl_dest);
3145
3146 return 0;
3147
3148nla_put_failure:
3149 nla_nest_cancel(skb, nl_dest);
3150 return -EMSGSIZE;
3151}
3152
3153static int ip_vs_genl_dump_dest(struct sk_buff *skb, struct ip_vs_dest *dest,
3154 struct netlink_callback *cb)
3155{
3156 void *hdr;
3157
15e47304 3158 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
9a812198
JV		 3159 &ip_vs_genl_family, NLM_F_MULTI,
3160 IPVS_CMD_NEW_DEST);
3161 if (!hdr)
3162 return -EMSGSIZE;
3163
3164 if (ip_vs_genl_fill_dest(skb, dest) < 0)
3165 goto nla_put_failure;
3166
053c095a
JB		 3167 genlmsg_end(skb, hdr);
3168 return 0;
9a812198
JV		 3169
3170nla_put_failure:
3171 genlmsg_cancel(skb, hdr);
3172 return -EMSGSIZE;
3173}
3174
3175static int ip_vs_genl_dump_dests(struct sk_buff *skb,
3176 struct netlink_callback *cb)
3177{
3178 int idx = 0;
3179 int start = cb->args[0];
3180 struct ip_vs_service *svc;
3181 struct ip_vs_dest *dest;
3182 struct nlattr *attrs[IPVS_CMD_ATTR_MAX + 1];
a0840e2e 3183 struct net *net = skb_sknet(skb);
9a812198
JV		 3184
3185 mutex_lock(&__ip_vs_mutex);
3186
3187 /* Try to find the service for which to dump destinations */
3188 if (nlmsg_parse(cb->nlh, GENL_HDRLEN, attrs,
3189 IPVS_CMD_ATTR_MAX, ip_vs_cmd_policy))
3190 goto out_err;
3191
a0840e2e 3192
fc723250 3193 svc = ip_vs_genl_find_service(net, attrs[IPVS_CMD_ATTR_SERVICE]);
9a812198
JV		 3194 if (IS_ERR(svc) || svc == NULL)
3195 goto out_err;
3196
3197 /* Dump the destinations */
3198 list_for_each_entry(dest, &svc->destinations, n_list) {
3199 if (++idx <= start)
3200 continue;
3201 if (ip_vs_genl_dump_dest(skb, dest, cb) < 0) {
3202 idx--;
3203 goto nla_put_failure;
3204 }
3205 }
3206
3207nla_put_failure:
3208 cb->args[0] = idx;
9a812198
JV		 3209
3210out_err:
3211 mutex_unlock(&__ip_vs_mutex);
3212
3213 return skb->len;
3214}
3215
c860c6b1 3216static int ip_vs_genl_parse_dest(struct ip_vs_dest_user_kern *udest,
9a812198
JV		 3217 struct nlattr *nla, int full_entry)
3218{
3219 struct nlattr *attrs[IPVS_DEST_ATTR_MAX + 1];
3220 struct nlattr *nla_addr, *nla_port;
6cff339b 3221 struct nlattr *nla_addr_family;
9a812198
JV		 3222
3223 /* Parse mandatory identifying destination fields first */
3224 if (nla == NULL ||
3225 nla_parse_nested(attrs, IPVS_DEST_ATTR_MAX, nla, ip_vs_dest_policy))
3226 return -EINVAL;
3227
3228 nla_addr = attrs[IPVS_DEST_ATTR_ADDR];
3229 nla_port = attrs[IPVS_DEST_ATTR_PORT];
6cff339b 3230 nla_addr_family = attrs[IPVS_DEST_ATTR_ADDR_FAMILY];
9a812198
JV		 3231
3232 if (!(nla_addr && nla_port))
3233 return -EINVAL;
3234
258c8893
SH		 3235 memset(udest, 0, sizeof(*udest));
3236
9a812198 3237 nla_memcpy(&udest->addr, nla_addr, sizeof(udest->addr));
0a925864 3238 udest->port = nla_get_be16(nla_port);
9a812198 3239
6cff339b
AG		 3240 if (nla_addr_family)
3241 udest->af = nla_get_u16(nla_addr_family);
3242 else
3243 udest->af = 0;
3244
9a812198
JV		 3245 /* If a full entry was requested, check for the additional fields */
3246 if (full_entry) {
3247 struct nlattr *nla_fwd, *nla_weight, *nla_u_thresh,
3248 *nla_l_thresh;
3249
3250 nla_fwd = attrs[IPVS_DEST_ATTR_FWD_METHOD];
3251 nla_weight = attrs[IPVS_DEST_ATTR_WEIGHT];
3252 nla_u_thresh = attrs[IPVS_DEST_ATTR_U_THRESH];
3253 nla_l_thresh = attrs[IPVS_DEST_ATTR_L_THRESH];
3254
3255 if (!(nla_fwd && nla_weight && nla_u_thresh && nla_l_thresh))
3256 return -EINVAL;
3257
3258 udest->conn_flags = nla_get_u32(nla_fwd)
3259 & IP_VS_CONN_F_FWD_MASK;
3260 udest->weight = nla_get_u32(nla_weight);
3261 udest->u_threshold = nla_get_u32(nla_u_thresh);
3262 udest->l_threshold = nla_get_u32(nla_l_thresh);
3263 }
3264
3265 return 0;
3266}
3267
0a925864
JA		 3268static int ip_vs_genl_fill_daemon(struct sk_buff *skb, __u32 state,
3269 const char *mcast_ifn, __u32 syncid)
9a812198
JV		 3270{
3271 struct nlattr *nl_daemon;
3272
3273 nl_daemon = nla_nest_start(skb, IPVS_CMD_ATTR_DAEMON);
3274 if (!nl_daemon)
3275 return -EMSGSIZE;
3276
969e8e25
DM		 3277 if (nla_put_u32(skb, IPVS_DAEMON_ATTR_STATE, state) ||
3278 nla_put_string(skb, IPVS_DAEMON_ATTR_MCAST_IFN, mcast_ifn) ||
3279 nla_put_u32(skb, IPVS_DAEMON_ATTR_SYNC_ID, syncid))
3280 goto nla_put_failure;
9a812198
JV		 3281 nla_nest_end(skb, nl_daemon);
3282
3283 return 0;
3284
3285nla_put_failure:
3286 nla_nest_cancel(skb, nl_daemon);
3287 return -EMSGSIZE;
3288}
3289
0a925864
JA		 3290static int ip_vs_genl_dump_daemon(struct sk_buff *skb, __u32 state,
3291 const char *mcast_ifn, __u32 syncid,
9a812198
JV		 3292 struct netlink_callback *cb)
3293{
3294 void *hdr;
15e47304 3295 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
9a812198
JV		 3296 &ip_vs_genl_family, NLM_F_MULTI,
3297 IPVS_CMD_NEW_DAEMON);
3298 if (!hdr)
3299 return -EMSGSIZE;
3300
3301 if (ip_vs_genl_fill_daemon(skb, state, mcast_ifn, syncid))
3302 goto nla_put_failure;
3303
053c095a
JB		 3304 genlmsg_end(skb, hdr);
3305 return 0;
9a812198
JV		 3306
3307nla_put_failure:
3308 genlmsg_cancel(skb, hdr);
3309 return -EMSGSIZE;
3310}
3311
3312static int ip_vs_genl_dump_daemons(struct sk_buff *skb,
3313 struct netlink_callback *cb)
3314{
a09d1977 3315 struct net *net = skb_sknet(skb);
f131315f
HS		 3316 struct netns_ipvs *ipvs = net_ipvs(net);
3317
ae1d48b2 3318 mutex_lock(&ipvs->sync_mutex);
f131315f 3319 if ((ipvs->sync_state & IP_VS_STATE_MASTER) && !cb->args[0]) {
9a812198 3320 if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_MASTER,
f131315f
HS		 3321 ipvs->master_mcast_ifn,
3322 ipvs->master_syncid, cb) < 0)
9a812198
JV		 3323 goto nla_put_failure;
3324
3325 cb->args[0] = 1;
3326 }
3327
f131315f 3328 if ((ipvs->sync_state & IP_VS_STATE_BACKUP) && !cb->args[1]) {
9a812198 3329 if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_BACKUP,
f131315f
HS		 3330 ipvs->backup_mcast_ifn,
3331 ipvs->backup_syncid, cb) < 0)
9a812198
JV		 3332 goto nla_put_failure;
3333
3334 cb->args[1] = 1;
3335 }
3336
3337nla_put_failure:
ae1d48b2 3338 mutex_unlock(&ipvs->sync_mutex);
9a812198
JV		 3339
3340 return skb->len;
3341}
3342
f131315f 3343static int ip_vs_genl_new_daemon(struct net *net, struct nlattr **attrs)
9a812198
JV		 3344{
3345 if (!(attrs[IPVS_DAEMON_ATTR_STATE] &&
3346 attrs[IPVS_DAEMON_ATTR_MCAST_IFN] &&
3347 attrs[IPVS_DAEMON_ATTR_SYNC_ID]))
3348 return -EINVAL;
3349
391f503d
AG		 3350 /* The synchronization protocol is incompatible with mixed family
3351 * services
3352 */
3353 if (net_ipvs(net)->mixed_address_family_dests > 0)
3354 return -EINVAL;
3355
f131315f
HS		 3356 return start_sync_thread(net,
3357 nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]),
9a812198
JV		 3358 nla_data(attrs[IPVS_DAEMON_ATTR_MCAST_IFN]),
3359 nla_get_u32(attrs[IPVS_DAEMON_ATTR_SYNC_ID]));
3360}
3361
f131315f 3362static int ip_vs_genl_del_daemon(struct net *net, struct nlattr **attrs)
9a812198
JV		 3363{
3364 if (!attrs[IPVS_DAEMON_ATTR_STATE])
3365 return -EINVAL;
3366
f131315f
HS		 3367 return stop_sync_thread(net,
3368 nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]));
9a812198
JV		 3369}
3370
9330419d 3371static int ip_vs_genl_set_config(struct net *net, struct nlattr **attrs)
9a812198
JV		 3372{
3373 struct ip_vs_timeout_user t;
3374
9330419d 3375 __ip_vs_get_timeouts(net, &t);
9a812198
JV		 3376
3377 if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP])
3378 t.tcp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP]);
3379
3380 if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN])
3381 t.tcp_fin_timeout =
3382 nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN]);
3383
3384 if (attrs[IPVS_CMD_ATTR_TIMEOUT_UDP])
3385 t.udp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_UDP]);
3386
9330419d 3387 return ip_vs_set_timeout(net, &t);
9a812198
JV		 3388}
3389
ae1d48b2 3390static int ip_vs_genl_set_daemon(struct sk_buff *skb, struct genl_info *info)
9a812198 3391{
9a812198 3392 int ret = 0, cmd;
fc723250 3393 struct net *net;
a0840e2e 3394 struct netns_ipvs *ipvs;
9a812198 3395
fc723250 3396 net = skb_sknet(skb);
a0840e2e 3397 ipvs = net_ipvs(net);
9a812198
JV		 3398 cmd = info->genlhdr->cmd;
3399
ae1d48b2 3400 if (cmd == IPVS_CMD_NEW_DAEMON || cmd == IPVS_CMD_DEL_DAEMON) {
9a812198
JV		 3401 struct nlattr *daemon_attrs[IPVS_DAEMON_ATTR_MAX + 1];
3402
ae1d48b2 3403 mutex_lock(&ipvs->sync_mutex);
9a812198
JV		 3404 if (!info->attrs[IPVS_CMD_ATTR_DAEMON] ||
3405 nla_parse_nested(daemon_attrs, IPVS_DAEMON_ATTR_MAX,
3406 info->attrs[IPVS_CMD_ATTR_DAEMON],
3407 ip_vs_daemon_policy)) {
3408 ret = -EINVAL;
3409 goto out;
3410 }
3411
3412 if (cmd == IPVS_CMD_NEW_DAEMON)
f131315f 3413 ret = ip_vs_genl_new_daemon(net, daemon_attrs);
9a812198 3414 else
f131315f 3415 ret = ip_vs_genl_del_daemon(net, daemon_attrs);
ae1d48b2
HS		 3416out:
3417 mutex_unlock(&ipvs->sync_mutex);
3418 }
3419 return ret;
3420}
3421
3422static int ip_vs_genl_set_cmd(struct sk_buff *skb, struct genl_info *info)
3423{
3424 struct ip_vs_service *svc = NULL;
3425 struct ip_vs_service_user_kern usvc;
3426 struct ip_vs_dest_user_kern udest;
3427 int ret = 0, cmd;
3428 int need_full_svc = 0, need_full_dest = 0;
3429 struct net *net;
ae1d48b2
HS		 3430
3431 net = skb_sknet(skb);
ae1d48b2
HS		 3432 cmd = info->genlhdr->cmd;
3433
3434 mutex_lock(&__ip_vs_mutex);
3435
3436 if (cmd == IPVS_CMD_FLUSH) {
578bc3ef 3437 ret = ip_vs_flush(net, false);
ae1d48b2
HS		 3438 goto out;
3439 } else if (cmd == IPVS_CMD_SET_CONFIG) {
3440 ret = ip_vs_genl_set_config(net, info->attrs);
9a812198
JV		 3441 goto out;
3442 } else if (cmd == IPVS_CMD_ZERO &&
3443 !info->attrs[IPVS_CMD_ATTR_SERVICE]) {
fc723250 3444 ret = ip_vs_zero_all(net);
9a812198
JV		 3445 goto out;
3446 }
3447
3448 /* All following commands require a service argument, so check if we
3449 * received a valid one. We need a full service specification when
3450 * adding / editing a service. Only identifying members otherwise. */
3451 if (cmd == IPVS_CMD_NEW_SERVICE || cmd == IPVS_CMD_SET_SERVICE)
3452 need_full_svc = 1;
3453
fc723250 3454 ret = ip_vs_genl_parse_service(net, &usvc,
9a812198 3455 info->attrs[IPVS_CMD_ATTR_SERVICE],
26c15cfd 3456 need_full_svc, &svc);
9a812198
JV		 3457 if (ret)
3458 goto out;
3459
9a812198
JV		 3460 /* Unless we're adding a new service, the service must already exist */
3461 if ((cmd != IPVS_CMD_NEW_SERVICE) && (svc == NULL)) {
3462 ret = -ESRCH;
3463 goto out;
3464 }
3465
3466 /* Destination commands require a valid destination argument. For
3467 * adding / editing a destination, we need a full destination
3468 * specification. */
3469 if (cmd == IPVS_CMD_NEW_DEST || cmd == IPVS_CMD_SET_DEST ||
3470 cmd == IPVS_CMD_DEL_DEST) {
3471 if (cmd != IPVS_CMD_DEL_DEST)
3472 need_full_dest = 1;
3473
3474 ret = ip_vs_genl_parse_dest(&udest,
3475 info->attrs[IPVS_CMD_ATTR_DEST],
3476 need_full_dest);
3477 if (ret)
3478 goto out;
6cff339b
AG		 3479
3480 /* Old protocols did not allow the user to specify address
3481 * family, so we set it to zero instead. We also didn't
3482 * allow heterogeneous pools in the old code, so it's safe
3483 * to assume that this will have the same address family as
3484 * the service.
3485 */
3486 if (udest.af == 0)
3487 udest.af = svc->af;
bc18d37f 3488
dd3733b3 3489 if (udest.af != svc->af && cmd != IPVS_CMD_DEL_DEST) {
bc18d37f
AG		 3490 /* The synchronization protocol is incompatible
3491 * with mixed family services
3492 */
3493 if (net_ipvs(net)->sync_state) {
3494 ret = -EINVAL;
3495 goto out;
3496 }
3497
3498 /* Which connection types do we support? */
3499 switch (udest.conn_flags) {
3500 case IP_VS_CONN_F_TUNNEL:
3501 /* We are able to forward this */
3502 break;
3503 default:
3504 ret = -EINVAL;
3505 goto out;
3506 }
3507 }
9a812198
JV		 3508 }
3509
3510 switch (cmd) {
3511 case IPVS_CMD_NEW_SERVICE:
3512 if (svc == NULL)
fc723250 3513 ret = ip_vs_add_service(net, &usvc, &svc);
9a812198
JV		 3514 else
3515 ret = -EEXIST;
3516 break;
3517 case IPVS_CMD_SET_SERVICE:
3518 ret = ip_vs_edit_service(svc, &usvc);
3519 break;
3520 case IPVS_CMD_DEL_SERVICE:
3521 ret = ip_vs_del_service(svc);
26c15cfd 3522 /* do not use svc, it can be freed */
9a812198
JV		 3523 break;
3524 case IPVS_CMD_NEW_DEST:
3525 ret = ip_vs_add_dest(svc, &udest);
3526 break;
3527 case IPVS_CMD_SET_DEST:
3528 ret = ip_vs_edit_dest(svc, &udest);
3529 break;
3530 case IPVS_CMD_DEL_DEST:
3531 ret = ip_vs_del_dest(svc, &udest);
3532 break;
3533 case IPVS_CMD_ZERO:
3534 ret = ip_vs_zero_service(svc);
3535 break;
3536 default:
3537 ret = -EINVAL;
3538 }
3539
3540out:
9a812198
JV		 3541 mutex_unlock(&__ip_vs_mutex);
3542
3543 return ret;
3544}
3545
3546static int ip_vs_genl_get_cmd(struct sk_buff *skb, struct genl_info *info)
3547{
3548 struct sk_buff *msg;
3549 void *reply;
3550 int ret, cmd, reply_cmd;
fc723250 3551 struct net *net;
9a812198 3552
fc723250 3553 net = skb_sknet(skb);
9a812198
JV		 3554 cmd = info->genlhdr->cmd;
3555
3556 if (cmd == IPVS_CMD_GET_SERVICE)
3557 reply_cmd = IPVS_CMD_NEW_SERVICE;
3558 else if (cmd == IPVS_CMD_GET_INFO)
3559 reply_cmd = IPVS_CMD_SET_INFO;
3560 else if (cmd == IPVS_CMD_GET_CONFIG)
3561 reply_cmd = IPVS_CMD_SET_CONFIG;
3562 else {
1e3e238e 3563 pr_err("unknown Generic Netlink command\n");
9a812198
JV		 3564 return -EINVAL;
3565 }
3566
3567 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3568 if (!msg)
3569 return -ENOMEM;
3570
3571 mutex_lock(&__ip_vs_mutex);
3572
3573 reply = genlmsg_put_reply(msg, info, &ip_vs_genl_family, 0, reply_cmd);
3574 if (reply == NULL)
3575 goto nla_put_failure;
3576
3577 switch (cmd) {
3578 case IPVS_CMD_GET_SERVICE:
3579 {
3580 struct ip_vs_service *svc;
3581
fc723250
HS		 3582 svc = ip_vs_genl_find_service(net,
3583 info->attrs[IPVS_CMD_ATTR_SERVICE]);
9a812198
JV		 3584 if (IS_ERR(svc)) {
3585 ret = PTR_ERR(svc);
3586 goto out_err;
3587 } else if (svc) {
3588 ret = ip_vs_genl_fill_service(msg, svc);
9a812198
JV		 3589 if (ret)
3590 goto nla_put_failure;
3591 } else {
3592 ret = -ESRCH;
3593 goto out_err;
3594 }
3595
3596 break;
3597 }
3598
3599 case IPVS_CMD_GET_CONFIG:
3600 {
3601 struct ip_vs_timeout_user t;
3602
9330419d 3603 __ip_vs_get_timeouts(net, &t);
9a812198 3604#ifdef CONFIG_IP_VS_PROTO_TCP
969e8e25
DM		 3605 if (nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP,
3606 t.tcp_timeout) ||
3607 nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP_FIN,
3608 t.tcp_fin_timeout))
3609 goto nla_put_failure;
9a812198
JV		 3610#endif
3611#ifdef CONFIG_IP_VS_PROTO_UDP
969e8e25
DM		 3612 if (nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_UDP, t.udp_timeout))
3613 goto nla_put_failure;
9a812198
JV		 3614#endif
3615
3616 break;
3617 }
3618
3619 case IPVS_CMD_GET_INFO:
969e8e25
DM		 3620 if (nla_put_u32(msg, IPVS_INFO_ATTR_VERSION,
3621 IP_VS_VERSION_CODE) ||
3622 nla_put_u32(msg, IPVS_INFO_ATTR_CONN_TAB_SIZE,
3623 ip_vs_conn_tab_size))
3624 goto nla_put_failure;
9a812198
JV		 3625 break;
3626 }
3627
3628 genlmsg_end(msg, reply);
134e6375 3629 ret = genlmsg_reply(msg, info);
9a812198
JV		 3630 goto out;
3631
3632nla_put_failure:
1e3e238e 3633 pr_err("not enough space in Netlink message\n");
9a812198
JV		 3634 ret = -EMSGSIZE;
3635
3636out_err:
3637 nlmsg_free(msg);
3638out:
3639 mutex_unlock(&__ip_vs_mutex);
3640
3641 return ret;
3642}
3643
3644
c61b0c13 3645static const struct genl_ops ip_vs_genl_ops[] = {
9a812198
JV		 3646 {
3647 .cmd = IPVS_CMD_NEW_SERVICE,
3648 .flags = GENL_ADMIN_PERM,
3649 .policy = ip_vs_cmd_policy,
3650 .doit = ip_vs_genl_set_cmd,
3651 },
3652 {
3653 .cmd = IPVS_CMD_SET_SERVICE,
3654 .flags = GENL_ADMIN_PERM,
3655 .policy = ip_vs_cmd_policy,
3656 .doit = ip_vs_genl_set_cmd,
3657 },
3658 {
3659 .cmd = IPVS_CMD_DEL_SERVICE,
3660 .flags = GENL_ADMIN_PERM,
3661 .policy = ip_vs_cmd_policy,
3662 .doit = ip_vs_genl_set_cmd,
3663 },
3664 {
3665 .cmd = IPVS_CMD_GET_SERVICE,
3666 .flags = GENL_ADMIN_PERM,
3667 .doit = ip_vs_genl_get_cmd,
3668 .dumpit = ip_vs_genl_dump_services,
3669 .policy = ip_vs_cmd_policy,
3670 },
3671 {
3672 .cmd = IPVS_CMD_NEW_DEST,
3673 .flags = GENL_ADMIN_PERM,
3674 .policy = ip_vs_cmd_policy,
3675 .doit = ip_vs_genl_set_cmd,
3676 },
3677 {
3678 .cmd = IPVS_CMD_SET_DEST,
3679 .flags = GENL_ADMIN_PERM,
3680 .policy = ip_vs_cmd_policy,
3681 .doit = ip_vs_genl_set_cmd,
3682 },
3683 {
3684 .cmd = IPVS_CMD_DEL_DEST,
3685 .flags = GENL_ADMIN_PERM,
3686 .policy = ip_vs_cmd_policy,
3687 .doit = ip_vs_genl_set_cmd,
3688 },
3689 {
3690 .cmd = IPVS_CMD_GET_DEST,
3691 .flags = GENL_ADMIN_PERM,
3692 .policy = ip_vs_cmd_policy,
3693 .dumpit = ip_vs_genl_dump_dests,
3694 },
3695 {
3696 .cmd = IPVS_CMD_NEW_DAEMON,
3697 .flags = GENL_ADMIN_PERM,
3698 .policy = ip_vs_cmd_policy,
ae1d48b2 3699 .doit = ip_vs_genl_set_daemon,
9a812198
JV		 3700 },
3701 {
3702 .cmd = IPVS_CMD_DEL_DAEMON,
3703 .flags = GENL_ADMIN_PERM,
3704 .policy = ip_vs_cmd_policy,
ae1d48b2 3705 .doit = ip_vs_genl_set_daemon,
9a812198
JV		 3706 },
3707 {
3708 .cmd = IPVS_CMD_GET_DAEMON,
3709 .flags = GENL_ADMIN_PERM,
3710 .dumpit = ip_vs_genl_dump_daemons,
3711 },
3712 {
3713 .cmd = IPVS_CMD_SET_CONFIG,
3714 .flags = GENL_ADMIN_PERM,
3715 .policy = ip_vs_cmd_policy,
3716 .doit = ip_vs_genl_set_cmd,
3717 },
3718 {
3719 .cmd = IPVS_CMD_GET_CONFIG,
3720 .flags = GENL_ADMIN_PERM,
3721 .doit = ip_vs_genl_get_cmd,
3722 },
3723 {
3724 .cmd = IPVS_CMD_GET_INFO,
3725 .flags = GENL_ADMIN_PERM,
3726 .doit = ip_vs_genl_get_cmd,
3727 },
3728 {
3729 .cmd = IPVS_CMD_ZERO,
3730 .flags = GENL_ADMIN_PERM,
3731 .policy = ip_vs_cmd_policy,
3732 .doit = ip_vs_genl_set_cmd,
3733 },
3734 {
3735 .cmd = IPVS_CMD_FLUSH,
3736 .flags = GENL_ADMIN_PERM,
3737 .doit = ip_vs_genl_set_cmd,
3738 },
3739};
3740
3741static int __init ip_vs_genl_register(void)
3742{
8f698d54 3743 return genl_register_family_with_ops(&ip_vs_genl_family,
c53ed742 3744 ip_vs_genl_ops);
9a812198
JV		 3745}
3746
3747static void ip_vs_genl_unregister(void)
3748{
3749 genl_unregister_family(&ip_vs_genl_family);
3750}
3751
3752/* End of Generic Netlink interface definitions */
3753
61b1ab45
HS		 3754/*
3755 * per netns intit/exit func.
3756 */
14e40546 3757#ifdef CONFIG_SYSCTL
2b2d2808 3758static int __net_init ip_vs_control_net_init_sysctl(struct net *net)
61b1ab45 3759{
fc723250
HS		 3760 int idx;
3761 struct netns_ipvs *ipvs = net_ipvs(net);
a0840e2e 3762 struct ctl_table *tbl;
fc723250 3763
a0840e2e
HS		 3764 atomic_set(&ipvs->dropentry, 0);
3765 spin_lock_init(&ipvs->dropentry_lock);
3766 spin_lock_init(&ipvs->droppacket_lock);
3767 spin_lock_init(&ipvs->securetcp_lock);
a0840e2e
HS		 3768
3769 if (!net_eq(net, &init_net)) {
3770 tbl = kmemdup(vs_vars, sizeof(vs_vars), GFP_KERNEL);
3771 if (tbl == NULL)
14e40546 3772 return -ENOMEM;
464dc801
EB		 3773
3774 /* Don't export sysctls to unprivileged users */
3775 if (net->user_ns != &init_user_ns)
3776 tbl[0].procname = NULL;
a0840e2e
HS		 3777 } else
3778 tbl = vs_vars;
3779 /* Initialize sysctl defaults */
3780 idx = 0;
3781 ipvs->sysctl_amemthresh = 1024;
3782 tbl[idx++].data = &ipvs->sysctl_amemthresh;
3783 ipvs->sysctl_am_droprate = 10;
3784 tbl[idx++].data = &ipvs->sysctl_am_droprate;
3785 tbl[idx++].data = &ipvs->sysctl_drop_entry;
3786 tbl[idx++].data = &ipvs->sysctl_drop_packet;
3787#ifdef CONFIG_IP_VS_NFCT
3788 tbl[idx++].data = &ipvs->sysctl_conntrack;
3789#endif
3790 tbl[idx++].data = &ipvs->sysctl_secure_tcp;
3791 ipvs->sysctl_snat_reroute = 1;
3792 tbl[idx++].data = &ipvs->sysctl_snat_reroute;
3793 ipvs->sysctl_sync_ver = 1;
3794 tbl[idx++].data = &ipvs->sysctl_sync_ver;
f73181c8
PNA		 3795 ipvs->sysctl_sync_ports = 1;
3796 tbl[idx++].data = &ipvs->sysctl_sync_ports;
4d0c875d 3797 tbl[idx++].data = &ipvs->sysctl_sync_persist_mode;
1c003b15
PNA		 3798 ipvs->sysctl_sync_qlen_max = nr_free_buffer_pages() / 32;
3799 tbl[idx++].data = &ipvs->sysctl_sync_qlen_max;
3800 ipvs->sysctl_sync_sock_size = 0;
3801 tbl[idx++].data = &ipvs->sysctl_sync_sock_size;
a0840e2e
HS		 3802 tbl[idx++].data = &ipvs->sysctl_cache_bypass;
3803 tbl[idx++].data = &ipvs->sysctl_expire_nodest_conn;
c6c96c18
AF		 3804 tbl[idx++].data = &ipvs->sysctl_sloppy_tcp;
3805 tbl[idx++].data = &ipvs->sysctl_sloppy_sctp;
a0840e2e 3806 tbl[idx++].data = &ipvs->sysctl_expire_quiescent_template;
59e0350e
SH		 3807 ipvs->sysctl_sync_threshold[0] = DEFAULT_SYNC_THRESHOLD;
3808 ipvs->sysctl_sync_threshold[1] = DEFAULT_SYNC_PERIOD;
a0840e2e
HS		 3809 tbl[idx].data = &ipvs->sysctl_sync_threshold;
3810 tbl[idx++].maxlen = sizeof(ipvs->sysctl_sync_threshold);
749c42b6
JA		 3811 ipvs->sysctl_sync_refresh_period = DEFAULT_SYNC_REFRESH_PERIOD;
3812 tbl[idx++].data = &ipvs->sysctl_sync_refresh_period;
3813 ipvs->sysctl_sync_retries = clamp_t(int, DEFAULT_SYNC_RETRIES, 0, 3);
3814 tbl[idx++].data = &ipvs->sysctl_sync_retries;
a0840e2e 3815 tbl[idx++].data = &ipvs->sysctl_nat_icmp_send;
3654e611
JA		 3816 ipvs->sysctl_pmtu_disc = 1;
3817 tbl[idx++].data = &ipvs->sysctl_pmtu_disc;
0c12582f 3818 tbl[idx++].data = &ipvs->sysctl_backup_only;
d752c364
MRL		 3819 ipvs->sysctl_conn_reuse_mode = 1;
3820 tbl[idx++].data = &ipvs->sysctl_conn_reuse_mode;
a0840e2e
HS		 3821
3822
ec8f23ce 3823 ipvs->sysctl_hdr = register_net_sysctl(net, "net/ipv4/vs", tbl);
0443929f
SH		 3824 if (ipvs->sysctl_hdr == NULL) {
3825 if (!net_eq(net, &init_net))
3826 kfree(tbl);
14e40546 3827 return -ENOMEM;
0443929f 3828 }
6ef757f9 3829 ip_vs_start_estimator(net, &ipvs->tot_stats);
a0840e2e 3830 ipvs->sysctl_tbl = tbl;
f6340ee0
HS		 3831 /* Schedule defense work */
3832 INIT_DELAYED_WORK(&ipvs->defense_work, defense_work_handler);
3833 schedule_delayed_work(&ipvs->defense_work, DEFENSE_TIMER_PERIOD);
61b1ab45 3834
61b1ab45 3835 return 0;
61b1ab45
HS		 3836}
3837
2b2d2808 3838static void __net_exit ip_vs_control_net_cleanup_sysctl(struct net *net)
61b1ab45 3839{
b17fc996
HS		 3840 struct netns_ipvs *ipvs = net_ipvs(net);
3841
f2431e6e
HS		 3842 cancel_delayed_work_sync(&ipvs->defense_work);
3843 cancel_work_sync(&ipvs->defense_work.work);
a0840e2e 3844 unregister_net_sysctl_table(ipvs->sysctl_hdr);
9802d21e 3845 ip_vs_stop_estimator(net, &ipvs->tot_stats);
f30bf2a5
TR		 3846
3847 if (!net_eq(net, &init_net))
3848 kfree(ipvs->sysctl_tbl);
14e40546
SH		 3849}
3850
3851#else
3852
2b2d2808
CG		 3853static int __net_init ip_vs_control_net_init_sysctl(struct net *net) { return 0; }
3854static void __net_exit ip_vs_control_net_cleanup_sysctl(struct net *net) { }
14e40546 3855
0443929f 3856#endif
14e40546 3857
7a4f0761
HS		 3858static struct notifier_block ip_vs_dst_notifier = {
3859 .notifier_call = ip_vs_dst_event,
3860};
3861
503cf15a 3862int __net_init ip_vs_control_net_init(struct net *net)
14e40546 3863{
827da44c 3864 int i, idx;
14e40546
SH		 3865 struct netns_ipvs *ipvs = net_ipvs(net);
3866
14e40546
SH		 3867 /* Initialize rs_table */
3868 for (idx = 0; idx < IP_VS_RTAB_SIZE; idx++)
276472ea 3869 INIT_HLIST_HEAD(&ipvs->rs_table[idx]);
14e40546
SH		 3870
3871 INIT_LIST_HEAD(&ipvs->dest_trash);
578bc3ef
JA		 3872 spin_lock_init(&ipvs->dest_trash_lock);
3873 setup_timer(&ipvs->dest_trash_timer, ip_vs_dest_trash_expire,
3874 (unsigned long) net);
14e40546
SH		 3875 atomic_set(&ipvs->ftpsvc_counter, 0);
3876 atomic_set(&ipvs->nullsvc_counter, 0);
3877
3878 /* procfs stats */
3879 ipvs->tot_stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
0a9ee813 3880 if (!ipvs->tot_stats.cpustats)
14e40546 3881 return -ENOMEM;
0a9ee813 3882
827da44c
JS		 3883 for_each_possible_cpu(i) {
3884 struct ip_vs_cpu_stats *ipvs_tot_stats;
3885 ipvs_tot_stats = per_cpu_ptr(ipvs->tot_stats.cpustats, i);
3886 u64_stats_init(&ipvs_tot_stats->syncp);
3887 }
3888
14e40546
SH		 3889 spin_lock_init(&ipvs->tot_stats.lock);
3890
d4beaa66
G		 3891 proc_create("ip_vs", 0, net->proc_net, &ip_vs_info_fops);
3892 proc_create("ip_vs_stats", 0, net->proc_net, &ip_vs_stats_fops);
3893 proc_create("ip_vs_stats_percpu", 0, net->proc_net,
3894 &ip_vs_stats_percpu_fops);
14e40546 3895
503cf15a 3896 if (ip_vs_control_net_init_sysctl(net))
14e40546
SH		 3897 goto err;
3898
3899 return 0;
3900
3901err:
2a0751af 3902 free_percpu(ipvs->tot_stats.cpustats);
61b1ab45
HS		 3903 return -ENOMEM;
3904}
3905
503cf15a 3906void __net_exit ip_vs_control_net_cleanup(struct net *net)
61b1ab45 3907{
b17fc996
HS		 3908 struct netns_ipvs *ipvs = net_ipvs(net);
3909
f2431e6e 3910 ip_vs_trash_cleanup(net);
503cf15a 3911 ip_vs_control_net_cleanup_sysctl(net);
ece31ffd
G		 3912 remove_proc_entry("ip_vs_stats_percpu", net->proc_net);
3913 remove_proc_entry("ip_vs_stats", net->proc_net);
3914 remove_proc_entry("ip_vs", net->proc_net);
2a0751af 3915 free_percpu(ipvs->tot_stats.cpustats);
61b1ab45
HS		 3916}
3917
8537de8a 3918int __init ip_vs_register_nl_ioctl(void)
1da177e4 3919{
fc723250 3920 int ret;
1da177e4 3921
1da177e4
LT		 3922 ret = nf_register_sockopt(&ip_vs_sockopts);
3923 if (ret) {
1e3e238e 3924 pr_err("cannot register sockopt.\n");
7a4f0761 3925 goto err_sock;
1da177e4
LT		 3926 }
3927
9a812198
JV		 3928 ret = ip_vs_genl_register();
3929 if (ret) {
1e3e238e 3930 pr_err("cannot register Generic Netlink interface.\n");
7a4f0761 3931 goto err_genl;
9a812198 3932 }
1da177e4 3933 return 0;
fc723250 3934
7a4f0761
HS		 3935err_genl:
3936 nf_unregister_sockopt(&ip_vs_sockopts);
3937err_sock:
fc723250 3938 return ret;
1da177e4
LT		 3939}
3940
8537de8a
HS		 3941void ip_vs_unregister_nl_ioctl(void)
3942{
3943 ip_vs_genl_unregister();
3944 nf_unregister_sockopt(&ip_vs_sockopts);
3945}
3946
3947int __init ip_vs_control_init(void)
3948{
3949 int idx;
3950 int ret;
3951
3952 EnterFunction(2);
3953
276472ea 3954 /* Initialize svc_table, ip_vs_svc_fwm_table */
8537de8a 3955 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38
JA		 3956 INIT_HLIST_HEAD(&ip_vs_svc_table[idx]);
3957 INIT_HLIST_HEAD(&ip_vs_svc_fwm_table[idx]);
8537de8a
HS		 3958 }
3959
3960 smp_wmb(); /* Do we really need it now ? */
3961
3962 ret = register_netdevice_notifier(&ip_vs_dst_notifier);
3963 if (ret < 0)
3964 return ret;
3965
3966 LeaveFunction(2);
3967 return 0;
3968}
3969
1da177e4
LT		 3970
3971void ip_vs_control_cleanup(void)
3972{
3973 EnterFunction(2);
7676e345 3974 unregister_netdevice_notifier(&ip_vs_dst_notifier);
1da177e4
LT		 3975 LeaveFunction(2);
3976}
Linux kernel - Deliverables
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