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netfilter: nft_lookup: add missing attribute validation for NFTA_LOOKUP_SET_ID
[linux-2.6-block.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
JA		 731static void
732ip_vs_copy_stats(struct ip_vs_stats_user *dst, struct ip_vs_stats *src)
733{
734#define IP_VS_SHOW_STATS_COUNTER(c) dst->c = src->ustats.c - src->ustats0.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
LT		 748
749static void
750ip_vs_zero_stats(struct ip_vs_stats *stats)
751{
752 spin_lock_bh(&stats->lock);
e93615d0 753
55a3d4e1
JA		 754 /* get current counters as zero point, rates are zeroed */
755
756#define IP_VS_ZERO_STATS_COUNTER(c) stats->ustats0.c = stats->ustats.c
55a3d4e1
JA		 757
758 IP_VS_ZERO_STATS_COUNTER(conns);
759 IP_VS_ZERO_STATS_COUNTER(inpkts);
760 IP_VS_ZERO_STATS_COUNTER(outpkts);
761 IP_VS_ZERO_STATS_COUNTER(inbytes);
762 IP_VS_ZERO_STATS_COUNTER(outbytes);
763
1da177e4 764 ip_vs_zero_estimator(stats);
e93615d0 765
3a14a313 766 spin_unlock_bh(&stats->lock);
1da177e4
LT		 767}
768
769/*
770 * Update a destination in the given service
771 */
772static void
26c15cfd
JA		 773__ip_vs_update_dest(struct ip_vs_service *svc, struct ip_vs_dest *dest,
774 struct ip_vs_dest_user_kern *udest, int add)
1da177e4 775{
fc723250 776 struct netns_ipvs *ipvs = net_ipvs(svc->net);
bcbde4c0 777 struct ip_vs_service *old_svc;
ceec4c38 778 struct ip_vs_scheduler *sched;
1da177e4
LT		 779 int conn_flags;
780
391f503d
AG		 781 /* We cannot modify an address and change the address family */
782 BUG_ON(!add && udest->af != dest->af);
783
784 if (add && udest->af != svc->af)
785 ipvs->mixed_address_family_dests++;
786
1da177e4
LT		 787 /* set the weight and the flags */
788 atomic_set(&dest->weight, udest->weight);
3575792e
JA		 789 conn_flags = udest->conn_flags & IP_VS_CONN_F_DEST_MASK;
790 conn_flags |= IP_VS_CONN_F_INACTIVE;
1da177e4 791
1da177e4 792 /* set the IP_VS_CONN_F_NOOUTPUT flag if not masquerading/NAT */
3575792e 793 if ((conn_flags & IP_VS_CONN_F_FWD_MASK) != IP_VS_CONN_F_MASQ) {
1da177e4
LT		 794 conn_flags |= IP_VS_CONN_F_NOOUTPUT;
795 } else {
796 /*
fc723250 797 * Put the real service in rs_table if not present.
1da177e4
LT		 798 * For now only for NAT!
799 */
fc723250 800 ip_vs_rs_hash(ipvs, dest);
1da177e4
LT		 801 }
802 atomic_set(&dest->conn_flags, conn_flags);
803
804 /* bind the service */
bcbde4c0
JA		 805 old_svc = rcu_dereference_protected(dest->svc, 1);
806 if (!old_svc) {
1da177e4
LT		 807 __ip_vs_bind_svc(dest, svc);
808 } else {
bcbde4c0 809 if (old_svc != svc) {
1da177e4
LT		 810 ip_vs_zero_stats(&dest->stats);
811 __ip_vs_bind_svc(dest, svc);
bcbde4c0 812 __ip_vs_svc_put(old_svc, true);
1da177e4
LT		 813 }
814 }
815
816 /* set the dest status flags */
817 dest->flags |= IP_VS_DEST_F_AVAILABLE;
818
819 if (udest->u_threshold == 0 || udest->u_threshold > dest->u_threshold)
820 dest->flags &= ~IP_VS_DEST_F_OVERLOAD;
821 dest->u_threshold = udest->u_threshold;
822 dest->l_threshold = udest->l_threshold;
26c15cfd 823
6cff339b
AG		 824 dest->af = udest->af;
825
ff75f40f 826 spin_lock_bh(&dest->dst_lock);
d1deae4d 827 __ip_vs_dst_cache_reset(dest);
ff75f40f 828 spin_unlock_bh(&dest->dst_lock);
fc604767 829
ceec4c38 830 sched = rcu_dereference_protected(svc->scheduler, 1);
26c15cfd 831 if (add) {
ceec4c38 832 ip_vs_start_estimator(svc->net, &dest->stats);
413c2d04 833 list_add_rcu(&dest->n_list, &svc->destinations);
26c15cfd 834 svc->num_dests++;
ceec4c38
JA		 835 if (sched->add_dest)
836 sched->add_dest(svc, dest);
6b6df466 837 } else {
ceec4c38
JA		 838 if (sched->upd_dest)
839 sched->upd_dest(svc, dest);
26c15cfd 840 }
1da177e4
LT		 841}
842
843
844/*
845 * Create a destination for the given service
846 */
847static int
c860c6b1 848ip_vs_new_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest,
1da177e4
LT		 849 struct ip_vs_dest **dest_p)
850{
851 struct ip_vs_dest *dest;
827da44c 852 unsigned int atype, i;
1da177e4
LT		 853
854 EnterFunction(2);
855
09571c7a 856#ifdef CONFIG_IP_VS_IPV6
6cff339b 857 if (udest->af == AF_INET6) {
09571c7a 858 atype = ipv6_addr_type(&udest->addr.in6);
3bfb92f4
SW		 859 if ((!(atype & IPV6_ADDR_UNICAST) ||
860 atype & IPV6_ADDR_LINKLOCAL) &&
4a98480b 861 !__ip_vs_addr_is_local_v6(svc->net, &udest->addr.in6))
09571c7a
VB		 862 return -EINVAL;
863 } else
864#endif
865 {
4a98480b 866 atype = inet_addr_type(svc->net, udest->addr.ip);
09571c7a
VB		 867 if (atype != RTN_LOCAL && atype != RTN_UNICAST)
868 return -EINVAL;
869 }
1da177e4 870
dee06e47 871 dest = kzalloc(sizeof(struct ip_vs_dest), GFP_KERNEL);
0a9ee813 872 if (dest == NULL)
1da177e4 873 return -ENOMEM;
0a9ee813 874
b17fc996 875 dest->stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
0a9ee813 876 if (!dest->stats.cpustats)
b17fc996 877 goto err_alloc;
1da177e4 878
827da44c
JS		 879 for_each_possible_cpu(i) {
880 struct ip_vs_cpu_stats *ip_vs_dest_stats;
881 ip_vs_dest_stats = per_cpu_ptr(dest->stats.cpustats, i);
882 u64_stats_init(&ip_vs_dest_stats->syncp);
883 }
884
6cff339b 885 dest->af = udest->af;
1da177e4 886 dest->protocol = svc->protocol;
c860c6b1 887 dest->vaddr = svc->addr;
1da177e4
LT		 888 dest->vport = svc->port;
889 dest->vfwmark = svc->fwmark;
6cff339b 890 ip_vs_addr_copy(udest->af, &dest->addr, &udest->addr);
1da177e4
LT		 891 dest->port = udest->port;
892
893 atomic_set(&dest->activeconns, 0);
894 atomic_set(&dest->inactconns, 0);
895 atomic_set(&dest->persistconns, 0);
26c15cfd 896 atomic_set(&dest->refcnt, 1);
1da177e4 897
276472ea 898 INIT_HLIST_NODE(&dest->d_list);
1da177e4
LT		 899 spin_lock_init(&dest->dst_lock);
900 spin_lock_init(&dest->stats.lock);
26c15cfd 901 __ip_vs_update_dest(svc, dest, udest, 1);
1da177e4
LT		 902
903 *dest_p = dest;
904
905 LeaveFunction(2);
906 return 0;
b17fc996
HS		 907
908err_alloc:
909 kfree(dest);
910 return -ENOMEM;
1da177e4
LT		 911}
912
913
914/*
915 * Add a destination into an existing service
916 */
917static int
c860c6b1 918ip_vs_add_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
1da177e4
LT		 919{
920 struct ip_vs_dest *dest;
c860c6b1 921 union nf_inet_addr daddr;
014d730d 922 __be16 dport = udest->port;
1da177e4
LT		 923 int ret;
924
925 EnterFunction(2);
926
927 if (udest->weight < 0) {
1e3e238e 928 pr_err("%s(): server weight less than zero\n", __func__);
1da177e4
LT		 929 return -ERANGE;
930 }
931
932 if (udest->l_threshold > udest->u_threshold) {
1e3e238e
HE		 933 pr_err("%s(): lower threshold is higher than upper threshold\n",
934 __func__);
1da177e4
LT		 935 return -ERANGE;
936 }
937
6cff339b 938 ip_vs_addr_copy(udest->af, &daddr, &udest->addr);
c860c6b1 939
413c2d04
JA		 940 /* We use function that requires RCU lock */
941 rcu_read_lock();
655eef10 942 dest = ip_vs_lookup_dest(svc, udest->af, &daddr, dport);
413c2d04 943 rcu_read_unlock();
7937df15 944
1da177e4 945 if (dest != NULL) {
1e3e238e 946 IP_VS_DBG(1, "%s(): dest already exists\n", __func__);
1da177e4
LT		 947 return -EEXIST;
948 }
949
950 /*
951 * Check if the dest already exists in the trash and
952 * is from the same service
953 */
ad147aa4 954 dest = ip_vs_trash_get_dest(svc, udest->af, &daddr, dport);
7937df15 955
1da177e4 956 if (dest != NULL) {
cfc78c5a
JV		 957 IP_VS_DBG_BUF(3, "Get destination %s:%u from trash, "
958 "dest->refcnt=%d, service %u/%s:%u\n",
6cff339b 959 IP_VS_DBG_ADDR(udest->af, &daddr), ntohs(dport),
cfc78c5a
JV		 960 atomic_read(&dest->refcnt),
961 dest->vfwmark,
962 IP_VS_DBG_ADDR(svc->af, &dest->vaddr),
963 ntohs(dest->vport));
964
26c15cfd
JA		 965 __ip_vs_update_dest(svc, dest, udest, 1);
966 ret = 0;
967 } else {
1da177e4 968 /*
26c15cfd 969 * Allocate and initialize the dest structure
1da177e4 970 */
26c15cfd 971 ret = ip_vs_new_dest(svc, udest, &dest);
1da177e4 972 }
1da177e4
LT		 973 LeaveFunction(2);
974
26c15cfd 975 return ret;
1da177e4
LT		 976}
977
978
979/*
980 * Edit a destination in the given service
981 */
982static int
c860c6b1 983ip_vs_edit_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
1da177e4
LT		 984{
985 struct ip_vs_dest *dest;
c860c6b1 986 union nf_inet_addr daddr;
014d730d 987 __be16 dport = udest->port;
1da177e4
LT		 988
989 EnterFunction(2);
990
991 if (udest->weight < 0) {
1e3e238e 992 pr_err("%s(): server weight less than zero\n", __func__);
1da177e4
LT		 993 return -ERANGE;
994 }
995
996 if (udest->l_threshold > udest->u_threshold) {
1e3e238e
HE		 997 pr_err("%s(): lower threshold is higher than upper threshold\n",
998 __func__);
1da177e4
LT		 999 return -ERANGE;
1000 }
1001
6cff339b 1002 ip_vs_addr_copy(udest->af, &daddr, &udest->addr);
c860c6b1 1003
413c2d04
JA		 1004 /* We use function that requires RCU lock */
1005 rcu_read_lock();
655eef10 1006 dest = ip_vs_lookup_dest(svc, udest->af, &daddr, dport);
413c2d04 1007 rcu_read_unlock();
7937df15 1008
1da177e4 1009 if (dest == NULL) {
1e3e238e 1010 IP_VS_DBG(1, "%s(): dest doesn't exist\n", __func__);
1da177e4
LT		 1011 return -ENOENT;
1012 }
1013
26c15cfd 1014 __ip_vs_update_dest(svc, dest, udest, 0);
1da177e4
LT		 1015 LeaveFunction(2);
1016
1017 return 0;
1018}
1019
1da177e4
LT		 1020/*
1021 * Delete a destination (must be already unlinked from the service)
1022 */
578bc3ef
JA		 1023static void __ip_vs_del_dest(struct net *net, struct ip_vs_dest *dest,
1024 bool cleanup)
1da177e4 1025{
a0840e2e
HS		 1026 struct netns_ipvs *ipvs = net_ipvs(net);
1027
6ef757f9 1028 ip_vs_stop_estimator(net, &dest->stats);
1da177e4
LT		 1029
1030 /*
1031 * Remove it from the d-linked list with the real services.
1032 */
1da177e4 1033 ip_vs_rs_unhash(dest);
1da177e4 1034
578bc3ef
JA		 1035 spin_lock_bh(&ipvs->dest_trash_lock);
1036 IP_VS_DBG_BUF(3, "Moving dest %s:%u into trash, dest->refcnt=%d\n",
1037 IP_VS_DBG_ADDR(dest->af, &dest->addr), ntohs(dest->port),
1038 atomic_read(&dest->refcnt));
1039 if (list_empty(&ipvs->dest_trash) && !cleanup)
1040 mod_timer(&ipvs->dest_trash_timer,
bcbde4c0 1041 jiffies + (IP_VS_DEST_TRASH_PERIOD >> 1));
578bc3ef
JA		 1042 /* dest lives in trash without reference */
1043 list_add(&dest->t_list, &ipvs->dest_trash);
bcbde4c0 1044 dest->idle_start = 0;
578bc3ef
JA		 1045 spin_unlock_bh(&ipvs->dest_trash_lock);
1046 ip_vs_dest_put(dest);
1da177e4
LT		 1047}
1048
1049
1050/*
1051 * Unlink a destination from the given service
1052 */
1053static void __ip_vs_unlink_dest(struct ip_vs_service *svc,
1054 struct ip_vs_dest *dest,
1055 int svcupd)
1056{
1057 dest->flags &= ~IP_VS_DEST_F_AVAILABLE;
1058
1059 /*
1060 * Remove it from the d-linked destination list.
1061 */
413c2d04 1062 list_del_rcu(&dest->n_list);
1da177e4 1063 svc->num_dests--;
82dfb6f3 1064
391f503d
AG		 1065 if (dest->af != svc->af)
1066 net_ipvs(svc->net)->mixed_address_family_dests--;
1067
ceec4c38
JA		 1068 if (svcupd) {
1069 struct ip_vs_scheduler *sched;
6b6df466 1070
ceec4c38
JA		 1071 sched = rcu_dereference_protected(svc->scheduler, 1);
1072 if (sched->del_dest)
1073 sched->del_dest(svc, dest);
1074 }
1da177e4
LT		 1075}
1076
1077
1078/*
1079 * Delete a destination server in the given service
1080 */
1081static int
c860c6b1 1082ip_vs_del_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
1da177e4
LT		 1083{
1084 struct ip_vs_dest *dest;
014d730d 1085 __be16 dport = udest->port;
1da177e4
LT		 1086
1087 EnterFunction(2);
1088
413c2d04
JA		 1089 /* We use function that requires RCU lock */
1090 rcu_read_lock();
655eef10 1091 dest = ip_vs_lookup_dest(svc, udest->af, &udest->addr, dport);
413c2d04 1092 rcu_read_unlock();
c860c6b1 1093
1da177e4 1094 if (dest == NULL) {
1e3e238e 1095 IP_VS_DBG(1, "%s(): destination not found!\n", __func__);
1da177e4
LT		 1096 return -ENOENT;
1097 }
1098
1da177e4
LT		 1099 /*
1100 * Unlink dest from the service
1101 */
1102 __ip_vs_unlink_dest(svc, dest, 1);
1103
1da177e4
LT		 1104 /*
1105 * Delete the destination
1106 */
578bc3ef 1107 __ip_vs_del_dest(svc->net, dest, false);
1da177e4
LT		 1108
1109 LeaveFunction(2);
1110
1111 return 0;
1112}
1113
578bc3ef
JA		 1114static void ip_vs_dest_trash_expire(unsigned long data)
1115{
1116 struct net *net = (struct net *) data;
1117 struct netns_ipvs *ipvs = net_ipvs(net);
1118 struct ip_vs_dest *dest, *next;
bcbde4c0 1119 unsigned long now = jiffies;
578bc3ef
JA		 1120
1121 spin_lock(&ipvs->dest_trash_lock);
1122 list_for_each_entry_safe(dest, next, &ipvs->dest_trash, t_list) {
578bc3ef
JA		 1123 if (atomic_read(&dest->refcnt) > 0)
1124 continue;
bcbde4c0
JA		 1125 if (dest->idle_start) {
1126 if (time_before(now, dest->idle_start +
1127 IP_VS_DEST_TRASH_PERIOD))
1128 continue;
1129 } else {
1130 dest->idle_start = max(1UL, now);
1131 continue;
1132 }
578bc3ef
JA		 1133 IP_VS_DBG_BUF(3, "Removing destination %u/%s:%u from trash\n",
1134 dest->vfwmark,
bcbde4c0 1135 IP_VS_DBG_ADDR(dest->af, &dest->addr),
578bc3ef
JA		 1136 ntohs(dest->port));
1137 list_del(&dest->t_list);
1138 ip_vs_dest_free(dest);
1139 }
1140 if (!list_empty(&ipvs->dest_trash))
1141 mod_timer(&ipvs->dest_trash_timer,
bcbde4c0 1142 jiffies + (IP_VS_DEST_TRASH_PERIOD >> 1));
578bc3ef
JA		 1143 spin_unlock(&ipvs->dest_trash_lock);
1144}
1da177e4
LT		 1145
1146/*
1147 * Add a service into the service hash table
1148 */
1149static int
fc723250 1150ip_vs_add_service(struct net *net, struct ip_vs_service_user_kern *u,
c860c6b1 1151 struct ip_vs_service **svc_p)
1da177e4 1152{
827da44c 1153 int ret = 0, i;
1da177e4 1154 struct ip_vs_scheduler *sched = NULL;
0d1e71b0 1155 struct ip_vs_pe *pe = NULL;
1da177e4 1156 struct ip_vs_service *svc = NULL;
a0840e2e 1157 struct netns_ipvs *ipvs = net_ipvs(net);
1da177e4
LT		 1158
1159 /* increase the module use count */
1160 ip_vs_use_count_inc();
1161
1162 /* Lookup the scheduler by 'u->sched_name' */
1163 sched = ip_vs_scheduler_get(u->sched_name);
1164 if (sched == NULL) {
1e3e238e 1165 pr_info("Scheduler module ip_vs_%s not found\n", u->sched_name);
1da177e4 1166 ret = -ENOENT;
6e08bfb8 1167 goto out_err;
1da177e4
LT		 1168 }
1169
0d1e71b0 1170 if (u->pe_name && *u->pe_name) {
e9e5eee8 1171 pe = ip_vs_pe_getbyname(u->pe_name);
0d1e71b0
SH		 1172 if (pe == NULL) {
1173 pr_info("persistence engine module ip_vs_pe_%s "
1174 "not found\n", u->pe_name);
1175 ret = -ENOENT;
1176 goto out_err;
1177 }
1178 }
1179
f94fd041 1180#ifdef CONFIG_IP_VS_IPV6
0a925864
JA		 1181 if (u->af == AF_INET6) {
1182 __u32 plen = (__force __u32) u->netmask;
1183
1184 if (plen < 1 || plen > 128) {
1185 ret = -EINVAL;
1186 goto out_err;
1187 }
f94fd041
JV		 1188 }
1189#endif
1190
dee06e47 1191 svc = kzalloc(sizeof(struct ip_vs_service), GFP_KERNEL);
1da177e4 1192 if (svc == NULL) {
1e3e238e 1193 IP_VS_DBG(1, "%s(): no memory\n", __func__);
1da177e4
LT		 1194 ret = -ENOMEM;
1195 goto out_err;
1196 }
b17fc996 1197 svc->stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
0a54e939
JL		 1198 if (!svc->stats.cpustats) {
1199 ret = -ENOMEM;
b17fc996 1200 goto out_err;
0a54e939 1201 }
1da177e4 1202
827da44c
JS		 1203 for_each_possible_cpu(i) {
1204 struct ip_vs_cpu_stats *ip_vs_stats;
1205 ip_vs_stats = per_cpu_ptr(svc->stats.cpustats, i);
1206 u64_stats_init(&ip_vs_stats->syncp);
1207 }
1208
1209
1da177e4 1210 /* I'm the first user of the service */
1da177e4
LT		 1211 atomic_set(&svc->refcnt, 0);
1212
c860c6b1 1213 svc->af = u->af;
1da177e4 1214 svc->protocol = u->protocol;
c860c6b1 1215 ip_vs_addr_copy(svc->af, &svc->addr, &u->addr);
1da177e4
LT		 1216 svc->port = u->port;
1217 svc->fwmark = u->fwmark;
1218 svc->flags = u->flags;
1219 svc->timeout = u->timeout * HZ;
1220 svc->netmask = u->netmask;
fc723250 1221 svc->net = net;
1da177e4
LT		 1222
1223 INIT_LIST_HEAD(&svc->destinations);
ba3a3ce1 1224 spin_lock_init(&svc->sched_lock);
1da177e4
LT		 1225 spin_lock_init(&svc->stats.lock);
1226
1227 /* Bind the scheduler */
1228 ret = ip_vs_bind_scheduler(svc, sched);
1229 if (ret)
1230 goto out_err;
1231 sched = NULL;
1232
0d1e71b0 1233 /* Bind the ct retriever */
ceec4c38 1234 RCU_INIT_POINTER(svc->pe, pe);
0d1e71b0
SH		 1235 pe = NULL;
1236
1da177e4
LT		 1237 /* Update the virtual service counters */
1238 if (svc->port == FTPPORT)
763f8d0e 1239 atomic_inc(&ipvs->ftpsvc_counter);
1da177e4 1240 else if (svc->port == 0)
763f8d0e 1241 atomic_inc(&ipvs->nullsvc_counter);
1da177e4 1242
6ef757f9 1243 ip_vs_start_estimator(net, &svc->stats);
f94fd041
JV		 1244
1245 /* Count only IPv4 services for old get/setsockopt interface */
1246 if (svc->af == AF_INET)
a0840e2e 1247 ipvs->num_services++;
1da177e4
LT		 1248
1249 /* Hash the service into the service table */
1da177e4 1250 ip_vs_svc_hash(svc);
1da177e4
LT		 1251
1252 *svc_p = svc;
7a4f0761
HS		 1253 /* Now there is a service - full throttle */
1254 ipvs->enable = 1;
1da177e4
LT		 1255 return 0;
1256
b17fc996 1257
6e08bfb8 1258 out_err:
1da177e4 1259 if (svc != NULL) {
ceec4c38
JA		 1260 ip_vs_unbind_scheduler(svc, sched);
1261 ip_vs_service_free(svc);
1da177e4
LT		 1262 }
1263 ip_vs_scheduler_put(sched);
0d1e71b0 1264 ip_vs_pe_put(pe);
1da177e4 1265
1da177e4
LT		 1266 /* decrease the module use count */
1267 ip_vs_use_count_dec();
1268
1269 return ret;
1270}
1271
1272
1273/*
1274 * Edit a service and bind it with a new scheduler
1275 */
1276static int
c860c6b1 1277ip_vs_edit_service(struct ip_vs_service *svc, struct ip_vs_service_user_kern *u)
1da177e4
LT		 1278{
1279 struct ip_vs_scheduler *sched, *old_sched;
0d1e71b0 1280 struct ip_vs_pe *pe = NULL, *old_pe = NULL;
1da177e4
LT		 1281 int ret = 0;
1282
1283 /*
1284 * Lookup the scheduler, by 'u->sched_name'
1285 */
1286 sched = ip_vs_scheduler_get(u->sched_name);
1287 if (sched == NULL) {
1e3e238e 1288 pr_info("Scheduler module ip_vs_%s not found\n", u->sched_name);
1da177e4
LT		 1289 return -ENOENT;
1290 }
1291 old_sched = sched;
1292
0d1e71b0 1293 if (u->pe_name && *u->pe_name) {
e9e5eee8 1294 pe = ip_vs_pe_getbyname(u->pe_name);
0d1e71b0
SH		 1295 if (pe == NULL) {
1296 pr_info("persistence engine module ip_vs_pe_%s "
1297 "not found\n", u->pe_name);
1298 ret = -ENOENT;
1299 goto out;
1300 }
1301 old_pe = pe;
1302 }
1303
f94fd041 1304#ifdef CONFIG_IP_VS_IPV6
0a925864
JA		 1305 if (u->af == AF_INET6) {
1306 __u32 plen = (__force __u32) u->netmask;
1307
1308 if (plen < 1 || plen > 128) {
1309 ret = -EINVAL;
1310 goto out;
1311 }
f94fd041
JV		 1312 }
1313#endif
1314
ceec4c38
JA		 1315 old_sched = rcu_dereference_protected(svc->scheduler, 1);
1316 if (sched != old_sched) {
1317 /* Bind the new scheduler */
1318 ret = ip_vs_bind_scheduler(svc, sched);
1319 if (ret) {
1320 old_sched = sched;
1321 goto out;
1322 }
1323 /* Unbind the old scheduler on success */
1324 ip_vs_unbind_scheduler(svc, old_sched);
1325 }
1da177e4
LT		 1326
1327 /*
1328 * Set the flags and timeout value
1329 */
1330 svc->flags = u->flags | IP_VS_SVC_F_HASHED;
1331 svc->timeout = u->timeout * HZ;
1332 svc->netmask = u->netmask;
1333
ceec4c38
JA		 1334 old_pe = rcu_dereference_protected(svc->pe, 1);
1335 if (pe != old_pe)
1336 rcu_assign_pointer(svc->pe, pe);
1da177e4 1337
552ad65a 1338out:
6e08bfb8 1339 ip_vs_scheduler_put(old_sched);
0d1e71b0 1340 ip_vs_pe_put(old_pe);
1da177e4
LT		 1341 return ret;
1342}
1343
1da177e4
LT		 1344/*
1345 * Delete a service from the service list
1346 * - The service must be unlinked, unlocked and not referenced!
1347 * - We are called under _bh lock
1348 */
578bc3ef 1349static void __ip_vs_del_service(struct ip_vs_service *svc, bool cleanup)
1da177e4
LT		 1350{
1351 struct ip_vs_dest *dest, *nxt;
1352 struct ip_vs_scheduler *old_sched;
0d1e71b0 1353 struct ip_vs_pe *old_pe;
a0840e2e 1354 struct netns_ipvs *ipvs = net_ipvs(svc->net);
0d1e71b0
SH		 1355
1356 pr_info("%s: enter\n", __func__);
1da177e4 1357
f94fd041
JV		 1358 /* Count only IPv4 services for old get/setsockopt interface */
1359 if (svc->af == AF_INET)
a0840e2e 1360 ipvs->num_services--;
f94fd041 1361
6ef757f9 1362 ip_vs_stop_estimator(svc->net, &svc->stats);
1da177e4
LT		 1363
1364 /* Unbind scheduler */
ceec4c38
JA		 1365 old_sched = rcu_dereference_protected(svc->scheduler, 1);
1366 ip_vs_unbind_scheduler(svc, old_sched);
6e08bfb8 1367 ip_vs_scheduler_put(old_sched);
1da177e4 1368
ceec4c38
JA		 1369 /* Unbind persistence engine, keep svc->pe */
1370 old_pe = rcu_dereference_protected(svc->pe, 1);
0d1e71b0
SH		 1371 ip_vs_pe_put(old_pe);
1372
1da177e4
LT		 1373 /*
1374 * Unlink the whole destination list
1375 */
1376 list_for_each_entry_safe(dest, nxt, &svc->destinations, n_list) {
1377 __ip_vs_unlink_dest(svc, dest, 0);
578bc3ef 1378 __ip_vs_del_dest(svc->net, dest, cleanup);
1da177e4
LT		 1379 }
1380
1381 /*
1382 * Update the virtual service counters
1383 */
1384 if (svc->port == FTPPORT)
763f8d0e 1385 atomic_dec(&ipvs->ftpsvc_counter);
1da177e4 1386 else if (svc->port == 0)
763f8d0e 1387 atomic_dec(&ipvs->nullsvc_counter);
1da177e4
LT		 1388
1389 /*
1390 * Free the service if nobody refers to it
1391 */
bcbde4c0 1392 __ip_vs_svc_put(svc, true);
1da177e4
LT		 1393
1394 /* decrease the module use count */
1395 ip_vs_use_count_dec();
1396}
1397
1398/*
26c15cfd 1399 * Unlink a service from list and try to delete it if its refcnt reached 0
1da177e4 1400 */
578bc3ef 1401static void ip_vs_unlink_service(struct ip_vs_service *svc, bool cleanup)
1da177e4 1402{
ceec4c38
JA		 1403 /* Hold svc to avoid double release from dest_trash */
1404 atomic_inc(&svc->refcnt);
1da177e4
LT		 1405 /*
1406 * Unhash it from the service table
1407 */
1da177e4
LT		 1408 ip_vs_svc_unhash(svc);
1409
578bc3ef 1410 __ip_vs_del_service(svc, cleanup);
26c15cfd
JA		 1411}
1412
1413/*
1414 * Delete a service from the service list
1415 */
1416static int ip_vs_del_service(struct ip_vs_service *svc)
1417{
1418 if (svc == NULL)
1419 return -EEXIST;
578bc3ef 1420 ip_vs_unlink_service(svc, false);
1da177e4
LT		 1421
1422 return 0;
1423}
1424
1425
1426/*
1427 * Flush all the virtual services
1428 */
578bc3ef 1429static int ip_vs_flush(struct net *net, bool cleanup)
1da177e4
LT		 1430{
1431 int idx;
ceec4c38
JA		 1432 struct ip_vs_service *svc;
1433 struct hlist_node *n;
1da177e4
LT		 1434
1435 /*
fc723250 1436 * Flush the service table hashed by <netns,protocol,addr,port>
1da177e4
LT		 1437 */
1438 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38
JA		 1439 hlist_for_each_entry_safe(svc, n, &ip_vs_svc_table[idx],
1440 s_list) {
fc723250 1441 if (net_eq(svc->net, net))
578bc3ef 1442 ip_vs_unlink_service(svc, cleanup);
1da177e4
LT		 1443 }
1444 }
1445
1446 /*
1447 * Flush the service table hashed by fwmark
1448 */
1449 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38
JA		 1450 hlist_for_each_entry_safe(svc, n, &ip_vs_svc_fwm_table[idx],
1451 f_list) {
fc723250 1452 if (net_eq(svc->net, net))
578bc3ef 1453 ip_vs_unlink_service(svc, cleanup);
1da177e4
LT		 1454 }
1455 }
1456
1457 return 0;
1458}
1459
7a4f0761
HS		 1460/*
1461 * Delete service by {netns} in the service table.
1462 * Called by __ip_vs_cleanup()
1463 */
503cf15a 1464void ip_vs_service_net_cleanup(struct net *net)
7a4f0761
HS		 1465{
1466 EnterFunction(2);
1467 /* Check for "full" addressed entries */
1468 mutex_lock(&__ip_vs_mutex);
578bc3ef 1469 ip_vs_flush(net, true);
7a4f0761
HS		 1470 mutex_unlock(&__ip_vs_mutex);
1471 LeaveFunction(2);
1472}
d1deae4d
JA		 1473
1474/* Put all references for device (dst_cache) */
7a4f0761 1475static inline void
d1deae4d 1476ip_vs_forget_dev(struct ip_vs_dest *dest, struct net_device *dev)
7a4f0761 1477{
d717bb2a
JA		 1478 struct ip_vs_dest_dst *dest_dst;
1479
7a4f0761 1480 spin_lock_bh(&dest->dst_lock);
d717bb2a
JA		 1481 dest_dst = rcu_dereference_protected(dest->dest_dst, 1);
1482 if (dest_dst && dest_dst->dst_cache->dev == dev) {
7a4f0761
HS		 1483 IP_VS_DBG_BUF(3, "Reset dev:%s dest %s:%u ,dest->refcnt=%d\n",
1484 dev->name,
1485 IP_VS_DBG_ADDR(dest->af, &dest->addr),
1486 ntohs(dest->port),
1487 atomic_read(&dest->refcnt));
d1deae4d 1488 __ip_vs_dst_cache_reset(dest);
7a4f0761
HS		 1489 }
1490 spin_unlock_bh(&dest->dst_lock);
1491
1492}
313eae63
JA		 1493/* Netdev event receiver
1494 * Currently only NETDEV_DOWN is handled to release refs to cached dsts
7a4f0761
HS		 1495 */
1496static int ip_vs_dst_event(struct notifier_block *this, unsigned long event,
351638e7 1497 void *ptr)
7a4f0761 1498{
351638e7 1499 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
7a4f0761 1500 struct net *net = dev_net(dev);
283283c4 1501 struct netns_ipvs *ipvs = net_ipvs(net);
7a4f0761
HS		 1502 struct ip_vs_service *svc;
1503 struct ip_vs_dest *dest;
1504 unsigned int idx;
1505
313eae63 1506 if (event != NETDEV_DOWN || !ipvs)
7a4f0761
HS		 1507 return NOTIFY_DONE;
1508 IP_VS_DBG(3, "%s() dev=%s\n", __func__, dev->name);
1509 EnterFunction(2);
1510 mutex_lock(&__ip_vs_mutex);
1511 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38 1512 hlist_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
7a4f0761
HS		 1513 if (net_eq(svc->net, net)) {
1514 list_for_each_entry(dest, &svc->destinations,
1515 n_list) {
d1deae4d 1516 ip_vs_forget_dev(dest, dev);
7a4f0761
HS		 1517 }
1518 }
1519 }
1520
ceec4c38 1521 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
7a4f0761
HS		 1522 if (net_eq(svc->net, net)) {
1523 list_for_each_entry(dest, &svc->destinations,
1524 n_list) {
d1deae4d 1525 ip_vs_forget_dev(dest, dev);
7a4f0761
HS		 1526 }
1527 }
1528
1529 }
1530 }
1531
578bc3ef
JA		 1532 spin_lock_bh(&ipvs->dest_trash_lock);
1533 list_for_each_entry(dest, &ipvs->dest_trash, t_list) {
d1deae4d 1534 ip_vs_forget_dev(dest, dev);
7a4f0761 1535 }
578bc3ef 1536 spin_unlock_bh(&ipvs->dest_trash_lock);
7a4f0761
HS		 1537 mutex_unlock(&__ip_vs_mutex);
1538 LeaveFunction(2);
1539 return NOTIFY_DONE;
1540}
1da177e4
LT		 1541
1542/*
1543 * Zero counters in a service or all services
1544 */
1545static int ip_vs_zero_service(struct ip_vs_service *svc)
1546{
1547 struct ip_vs_dest *dest;
1548
1da177e4
LT		 1549 list_for_each_entry(dest, &svc->destinations, n_list) {
1550 ip_vs_zero_stats(&dest->stats);
1551 }
1552 ip_vs_zero_stats(&svc->stats);
1da177e4
LT		 1553 return 0;
1554}
1555
fc723250 1556static int ip_vs_zero_all(struct net *net)
1da177e4
LT		 1557{
1558 int idx;
1559 struct ip_vs_service *svc;
1560
1561 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38 1562 hlist_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
fc723250
HS		 1563 if (net_eq(svc->net, net))
1564 ip_vs_zero_service(svc);
1da177e4
LT		 1565 }
1566 }
1567
1568 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38 1569 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
fc723250
HS		 1570 if (net_eq(svc->net, net))
1571 ip_vs_zero_service(svc);
1da177e4
LT		 1572 }
1573 }
1574
2a0751af 1575 ip_vs_zero_stats(&net_ipvs(net)->tot_stats);
1da177e4
LT		 1576 return 0;
1577}
1578
14e40546 1579#ifdef CONFIG_SYSCTL
749c42b6
JA		 1580
1581static int zero;
1582static int three = 3;
1583
1da177e4 1584static int
fe2c6338 1585proc_do_defense_mode(struct ctl_table *table, int write,
1da177e4
LT		 1586 void __user *buffer, size_t *lenp, loff_t *ppos)
1587{
9330419d 1588 struct net *net = current->nsproxy->net_ns;
1da177e4
LT		 1589 int *valp = table->data;
1590 int val = *valp;
1591 int rc;
1592
8d65af78 1593 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1da177e4
LT		 1594 if (write && (*valp != val)) {
1595 if ((*valp < 0) || (*valp > 3)) {
1596 /* Restore the correct value */
1597 *valp = val;
1598 } else {
9330419d 1599 update_defense_level(net_ipvs(net));
1da177e4
LT		 1600 }
1601 }
1602 return rc;
1603}
1604
1da177e4 1605static int
fe2c6338 1606proc_do_sync_threshold(struct ctl_table *table, int write,
1da177e4
LT		 1607 void __user *buffer, size_t *lenp, loff_t *ppos)
1608{
1609 int *valp = table->data;
1610 int val[2];
1611 int rc;
1612
1613 /* backup the value first */
1614 memcpy(val, valp, sizeof(val));
1615
8d65af78 1616 rc = proc_dointvec(table, write, buffer, lenp, ppos);
749c42b6
JA		 1617 if (write && (valp[0] < 0 || valp[1] < 0 ||
1618 (valp[0] >= valp[1] && valp[1]))) {
1da177e4
LT		 1619 /* Restore the correct value */
1620 memcpy(valp, val, sizeof(val));
1621 }
1622 return rc;
1623}
1624
b880c1f0 1625static int
fe2c6338 1626proc_do_sync_mode(struct ctl_table *table, int write,
b880c1f0
HS		 1627 void __user *buffer, size_t *lenp, loff_t *ppos)
1628{
1629 int *valp = table->data;
1630 int val = *valp;
1631 int rc;
1632
1633 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1634 if (write && (*valp != val)) {
1635 if ((*valp < 0) || (*valp > 1)) {
1636 /* Restore the correct value */
1637 *valp = val;
f73181c8
PNA		 1638 }
1639 }
1640 return rc;
1641}
1642
1643static int
fe2c6338 1644proc_do_sync_ports(struct ctl_table *table, int write,
f73181c8
PNA		 1645 void __user *buffer, size_t *lenp, loff_t *ppos)
1646{
1647 int *valp = table->data;
1648 int val = *valp;
1649 int rc;
1650
1651 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1652 if (write && (*valp != val)) {
1653 if (*valp < 1 || !is_power_of_2(*valp)) {
1654 /* Restore the correct value */
1655 *valp = val;
b880c1f0
HS		 1656 }
1657 }
1658 return rc;
1659}
1da177e4
LT		 1660
1661/*
1662 * IPVS sysctl table (under the /proc/sys/net/ipv4/vs/)
a0840e2e 1663 * Do not change order or insert new entries without
503cf15a 1664 * align with netns init in ip_vs_control_net_init()
1da177e4
LT		 1665 */
1666
1667static struct ctl_table vs_vars[] = {
1668 {
1da177e4 1669 .procname = "amemthresh",
1da177e4
LT		 1670 .maxlen = sizeof(int),
1671 .mode = 0644,
6d9f239a 1672 .proc_handler = proc_dointvec,
1da177e4 1673 },
1da177e4 1674 {
1da177e4 1675 .procname = "am_droprate",
1da177e4
LT		 1676 .maxlen = sizeof(int),
1677 .mode = 0644,
6d9f239a 1678 .proc_handler = proc_dointvec,
1da177e4
LT		 1679 },
1680 {
1da177e4 1681 .procname = "drop_entry",
1da177e4
LT		 1682 .maxlen = sizeof(int),
1683 .mode = 0644,
6d9f239a 1684 .proc_handler = proc_do_defense_mode,
1da177e4
LT		 1685 },
1686 {
1da177e4 1687 .procname = "drop_packet",
1da177e4
LT		 1688 .maxlen = sizeof(int),
1689 .mode = 0644,
6d9f239a 1690 .proc_handler = proc_do_defense_mode,
1da177e4 1691 },
f4bc17cd
JA		 1692#ifdef CONFIG_IP_VS_NFCT
1693 {
1694 .procname = "conntrack",
f4bc17cd
JA		 1695 .maxlen = sizeof(int),
1696 .mode = 0644,
1697 .proc_handler = &proc_dointvec,
1698 },
1699#endif
1da177e4 1700 {
1da177e4 1701 .procname = "secure_tcp",
1da177e4
LT		 1702 .maxlen = sizeof(int),
1703 .mode = 0644,
6d9f239a 1704 .proc_handler = proc_do_defense_mode,
1da177e4 1705 },
8a803040
JA		 1706 {
1707 .procname = "snat_reroute",
8a803040
JA		 1708 .maxlen = sizeof(int),
1709 .mode = 0644,
1710 .proc_handler = &proc_dointvec,
1711 },
b880c1f0
HS		 1712 {
1713 .procname = "sync_version",
b880c1f0
HS		 1714 .maxlen = sizeof(int),
1715 .mode = 0644,
1716 .proc_handler = &proc_do_sync_mode,
1717 },
f73181c8
PNA		 1718 {
1719 .procname = "sync_ports",
1720 .maxlen = sizeof(int),
1721 .mode = 0644,
1722 .proc_handler = &proc_do_sync_ports,
1723 },
4d0c875d
JA		 1724 {
1725 .procname = "sync_persist_mode",
1726 .maxlen = sizeof(int),
1727 .mode = 0644,
1728 .proc_handler = proc_dointvec,
1729 },
1c003b15
PNA		 1730 {
1731 .procname = "sync_qlen_max",
07995674 1732 .maxlen = sizeof(unsigned long),
1c003b15 1733 .mode = 0644,
07995674 1734 .proc_handler = proc_doulongvec_minmax,
1c003b15
PNA		 1735 },
1736 {
1737 .procname = "sync_sock_size",
1738 .maxlen = sizeof(int),
1739 .mode = 0644,
1740 .proc_handler = proc_dointvec,
1741 },
a0840e2e
HS		 1742 {
1743 .procname = "cache_bypass",
1744 .maxlen = sizeof(int),
1745 .mode = 0644,
1746 .proc_handler = proc_dointvec,
1747 },
1748 {
1749 .procname = "expire_nodest_conn",
1750 .maxlen = sizeof(int),
1751 .mode = 0644,
1752 .proc_handler = proc_dointvec,
1753 },
c6c96c18
AF		 1754 {
1755 .procname = "sloppy_tcp",
1756 .maxlen = sizeof(int),
1757 .mode = 0644,
1758 .proc_handler = proc_dointvec,
1759 },
1760 {
1761 .procname = "sloppy_sctp",
1762 .maxlen = sizeof(int),
1763 .mode = 0644,
1764 .proc_handler = proc_dointvec,
1765 },
a0840e2e
HS		 1766 {
1767 .procname = "expire_quiescent_template",
1768 .maxlen = sizeof(int),
1769 .mode = 0644,
1770 .proc_handler = proc_dointvec,
1771 },
1772 {
1773 .procname = "sync_threshold",
1774 .maxlen =
1775 sizeof(((struct netns_ipvs *)0)->sysctl_sync_threshold),
1776 .mode = 0644,
1777 .proc_handler = proc_do_sync_threshold,
1778 },
749c42b6
JA		 1779 {
1780 .procname = "sync_refresh_period",
1781 .maxlen = sizeof(int),
1782 .mode = 0644,
1783 .proc_handler = proc_dointvec_jiffies,
1784 },
1785 {
1786 .procname = "sync_retries",
1787 .maxlen = sizeof(int),
1788 .mode = 0644,
1789 .proc_handler = proc_dointvec_minmax,
1790 .extra1 = &zero,
1791 .extra2 = &three,
1792 },
a0840e2e
HS		 1793 {
1794 .procname = "nat_icmp_send",
1795 .maxlen = sizeof(int),
1796 .mode = 0644,
1797 .proc_handler = proc_dointvec,
1798 },
3654e611
JA		 1799 {
1800 .procname = "pmtu_disc",
1801 .maxlen = sizeof(int),
1802 .mode = 0644,
1803 .proc_handler = proc_dointvec,
1804 },
0c12582f
JA		 1805 {
1806 .procname = "backup_only",
1807 .maxlen = sizeof(int),
1808 .mode = 0644,
1809 .proc_handler = proc_dointvec,
1810 },
a0840e2e
HS		 1811#ifdef CONFIG_IP_VS_DEBUG
1812 {
1813 .procname = "debug_level",
1814 .data = &sysctl_ip_vs_debug_level,
1815 .maxlen = sizeof(int),
1816 .mode = 0644,
1817 .proc_handler = proc_dointvec,
1818 },
1da177e4 1819#endif
f8572d8f 1820 { }
1da177e4
LT		 1821};
1822
14e40546 1823#endif
1da177e4 1824
1da177e4
LT		 1825#ifdef CONFIG_PROC_FS
1826
1827struct ip_vs_iter {
fc723250 1828 struct seq_net_private p; /* Do not move this, netns depends upon it*/
ceec4c38 1829 struct hlist_head *table;
1da177e4
LT		 1830 int bucket;
1831};
1832
1833/*
1834 * Write the contents of the VS rule table to a PROCfs file.
1835 * (It is kept just for backward compatibility)
1836 */
95c96174 1837static inline const char *ip_vs_fwd_name(unsigned int flags)
1da177e4
LT		 1838{
1839 switch (flags & IP_VS_CONN_F_FWD_MASK) {
1840 case IP_VS_CONN_F_LOCALNODE:
1841 return "Local";
1842 case IP_VS_CONN_F_TUNNEL:
1843 return "Tunnel";
1844 case IP_VS_CONN_F_DROUTE:
1845 return "Route";
1846 default:
1847 return "Masq";
1848 }
1849}
1850
1851
1852/* Get the Nth entry in the two lists */
1853static struct ip_vs_service *ip_vs_info_array(struct seq_file *seq, loff_t pos)
1854{
fc723250 1855 struct net *net = seq_file_net(seq);
1da177e4
LT		 1856 struct ip_vs_iter *iter = seq->private;
1857 int idx;
1858 struct ip_vs_service *svc;
1859
1860 /* look in hash by protocol */
1861 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38 1862 hlist_for_each_entry_rcu(svc, &ip_vs_svc_table[idx], s_list) {
fc723250 1863 if (net_eq(svc->net, net) && pos-- == 0) {
1da177e4
LT		 1864 iter->table = ip_vs_svc_table;
1865 iter->bucket = idx;
1866 return svc;
1867 }
1868 }
1869 }
1870
1871 /* keep looking in fwmark */
1872 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38
JA		 1873 hlist_for_each_entry_rcu(svc, &ip_vs_svc_fwm_table[idx],
1874 f_list) {
fc723250 1875 if (net_eq(svc->net, net) && pos-- == 0) {
1da177e4
LT		 1876 iter->table = ip_vs_svc_fwm_table;
1877 iter->bucket = idx;
1878 return svc;
1879 }
1880 }
1881 }
1882
1883 return NULL;
1884}
1885
1886static void *ip_vs_info_seq_start(struct seq_file *seq, loff_t *pos)
371990ee 1887 __acquires(RCU)
1da177e4 1888{
ceec4c38 1889 rcu_read_lock();
1da177e4
LT		 1890 return *pos ? ip_vs_info_array(seq, *pos - 1) : SEQ_START_TOKEN;
1891}
1892
1893
1894static void *ip_vs_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1895{
ceec4c38 1896 struct hlist_node *e;
1da177e4
LT		 1897 struct ip_vs_iter *iter;
1898 struct ip_vs_service *svc;
1899
1900 ++*pos;
1901 if (v == SEQ_START_TOKEN)
1902 return ip_vs_info_array(seq,0);
1903
1904 svc = v;
1905 iter = seq->private;
1906
1907 if (iter->table == ip_vs_svc_table) {
1908 /* next service in table hashed by protocol */
ceec4c38
JA		 1909 e = rcu_dereference(hlist_next_rcu(&svc->s_list));
1910 if (e)
1911 return hlist_entry(e, struct ip_vs_service, s_list);
1da177e4
LT		 1912
1913 while (++iter->bucket < IP_VS_SVC_TAB_SIZE) {
ceec4c38
JA		 1914 hlist_for_each_entry_rcu(svc,
1915 &ip_vs_svc_table[iter->bucket],
1916 s_list) {
1da177e4
LT		 1917 return svc;
1918 }
1919 }
1920
1921 iter->table = ip_vs_svc_fwm_table;
1922 iter->bucket = -1;
1923 goto scan_fwmark;
1924 }
1925
1926 /* next service in hashed by fwmark */
ceec4c38
JA		 1927 e = rcu_dereference(hlist_next_rcu(&svc->f_list));
1928 if (e)
1929 return hlist_entry(e, struct ip_vs_service, f_list);
1da177e4
LT		 1930
1931 scan_fwmark:
1932 while (++iter->bucket < IP_VS_SVC_TAB_SIZE) {
ceec4c38
JA		 1933 hlist_for_each_entry_rcu(svc,
1934 &ip_vs_svc_fwm_table[iter->bucket],
1935 f_list)
1da177e4
LT		 1936 return svc;
1937 }
1938
1939 return NULL;
1940}
1941
1942static void ip_vs_info_seq_stop(struct seq_file *seq, void *v)
371990ee 1943 __releases(RCU)
1da177e4 1944{
ceec4c38 1945 rcu_read_unlock();
1da177e4
LT		 1946}
1947
1948
1949static int ip_vs_info_seq_show(struct seq_file *seq, void *v)
1950{
1951 if (v == SEQ_START_TOKEN) {
1952 seq_printf(seq,
1953 "IP Virtual Server version %d.%d.%d (size=%d)\n",
6f7edb48 1954 NVERSION(IP_VS_VERSION_CODE), ip_vs_conn_tab_size);
1da177e4
LT		 1955 seq_puts(seq,
1956 "Prot LocalAddress:Port Scheduler Flags\n");
1957 seq_puts(seq,
1958 " -> RemoteAddress:Port Forward Weight ActiveConn InActConn\n");
1959 } else {
1960 const struct ip_vs_service *svc = v;
1961 const struct ip_vs_iter *iter = seq->private;
1962 const struct ip_vs_dest *dest;
ceec4c38 1963 struct ip_vs_scheduler *sched = rcu_dereference(svc->scheduler);
1da177e4 1964
667a5f18
VB		 1965 if (iter->table == ip_vs_svc_table) {
1966#ifdef CONFIG_IP_VS_IPV6
1967 if (svc->af == AF_INET6)
5b095d98 1968 seq_printf(seq, "%s [%pI6]:%04X %s ",
667a5f18 1969 ip_vs_proto_name(svc->protocol),
38ff4fa4 1970 &svc->addr.in6,
667a5f18 1971 ntohs(svc->port),
ceec4c38 1972 sched->name);
667a5f18
VB		 1973 else
1974#endif
26ec037f 1975 seq_printf(seq, "%s %08X:%04X %s %s ",
667a5f18
VB		 1976 ip_vs_proto_name(svc->protocol),
1977 ntohl(svc->addr.ip),
1978 ntohs(svc->port),
ceec4c38 1979 sched->name,
26ec037f 1980 (svc->flags & IP_VS_SVC_F_ONEPACKET)?"ops ":"");
667a5f18 1981 } else {
26ec037f 1982 seq_printf(seq, "FWM %08X %s %s",
ceec4c38 1983 svc->fwmark, sched->name,
26ec037f 1984 (svc->flags & IP_VS_SVC_F_ONEPACKET)?"ops ":"");
667a5f18 1985 }
1da177e4
LT		 1986
1987 if (svc->flags & IP_VS_SVC_F_PERSISTENT)
1988 seq_printf(seq, "persistent %d %08X\n",
1989 svc->timeout,
1990 ntohl(svc->netmask));
1991 else
1992 seq_putc(seq, '\n');
1993
413c2d04 1994 list_for_each_entry_rcu(dest, &svc->destinations, n_list) {
667a5f18
VB		 1995#ifdef CONFIG_IP_VS_IPV6
1996 if (dest->af == AF_INET6)
1997 seq_printf(seq,
5b095d98 1998 " -> [%pI6]:%04X"
667a5f18 1999 " %-7s %-6d %-10d %-10d\n",
38ff4fa4 2000 &dest->addr.in6,
667a5f18
VB		 2001 ntohs(dest->port),
2002 ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
2003 atomic_read(&dest->weight),
2004 atomic_read(&dest->activeconns),
2005 atomic_read(&dest->inactconns));
2006 else
2007#endif
2008 seq_printf(seq,
2009 " -> %08X:%04X "
2010 "%-7s %-6d %-10d %-10d\n",
2011 ntohl(dest->addr.ip),
2012 ntohs(dest->port),
2013 ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
2014 atomic_read(&dest->weight),
2015 atomic_read(&dest->activeconns),
2016 atomic_read(&dest->inactconns));
2017
1da177e4
LT		 2018 }
2019 }
2020 return 0;
2021}
2022
56b3d975 2023static const struct seq_operations ip_vs_info_seq_ops = {
1da177e4
LT		 2024 .start = ip_vs_info_seq_start,
2025 .next = ip_vs_info_seq_next,
2026 .stop = ip_vs_info_seq_stop,
2027 .show = ip_vs_info_seq_show,
2028};
2029
2030static int ip_vs_info_open(struct inode *inode, struct file *file)
2031{
fc723250 2032 return seq_open_net(inode, file, &ip_vs_info_seq_ops,
cf7732e4 2033 sizeof(struct ip_vs_iter));
1da177e4
LT		 2034}
2035
9a32144e 2036static const struct file_operations ip_vs_info_fops = {
1da177e4
LT		 2037 .owner = THIS_MODULE,
2038 .open = ip_vs_info_open,
2039 .read = seq_read,
2040 .llseek = seq_lseek,
0f08190f 2041 .release = seq_release_net,
1da177e4
LT		 2042};
2043
1da177e4
LT		 2044static int ip_vs_stats_show(struct seq_file *seq, void *v)
2045{
b17fc996 2046 struct net *net = seq_file_single_net(seq);
55a3d4e1 2047 struct ip_vs_stats_user show;
1da177e4
LT		 2048
2049/* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2050 seq_puts(seq,
2051 " Total Incoming Outgoing Incoming Outgoing\n");
2052 seq_printf(seq,
2053 " Conns Packets Packets Bytes Bytes\n");
2054
55a3d4e1
JA		 2055 ip_vs_copy_stats(&show, &net_ipvs(net)->tot_stats);
2056 seq_printf(seq, "%8X %8X %8X %16LX %16LX\n\n", show.conns,
2057 show.inpkts, show.outpkts,
2058 (unsigned long long) show.inbytes,
2059 (unsigned long long) show.outbytes);
1da177e4
LT		 2060
2061/* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2062 seq_puts(seq,
2063 " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
55a3d4e1
JA		 2064 seq_printf(seq, "%8X %8X %8X %16X %16X\n",
2065 show.cps, show.inpps, show.outpps,
2066 show.inbps, show.outbps);
1da177e4
LT		 2067
2068 return 0;
2069}
2070
2071static int ip_vs_stats_seq_open(struct inode *inode, struct file *file)
2072{
fc723250 2073 return single_open_net(inode, file, ip_vs_stats_show);
1da177e4
LT		 2074}
2075
9a32144e 2076static const struct file_operations ip_vs_stats_fops = {
1da177e4
LT		 2077 .owner = THIS_MODULE,
2078 .open = ip_vs_stats_seq_open,
2079 .read = seq_read,
2080 .llseek = seq_lseek,
0f08190f 2081 .release = single_release_net,
1da177e4
LT		 2082};
2083
b17fc996
HS		 2084static int ip_vs_stats_percpu_show(struct seq_file *seq, void *v)
2085{
2086 struct net *net = seq_file_single_net(seq);
2a0751af 2087 struct ip_vs_stats *tot_stats = &net_ipvs(net)->tot_stats;
371990ee 2088 struct ip_vs_cpu_stats __percpu *cpustats = tot_stats->cpustats;
ea9f22cc 2089 struct ip_vs_stats_user rates;
b17fc996
HS		 2090 int i;
2091
2092/* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2093 seq_puts(seq,
2094 " Total Incoming Outgoing Incoming Outgoing\n");
2095 seq_printf(seq,
2096 "CPU Conns Packets Packets Bytes Bytes\n");
2097
2098 for_each_possible_cpu(i) {
2a0751af
JA		 2099 struct ip_vs_cpu_stats *u = per_cpu_ptr(cpustats, i);
2100 unsigned int start;
2101 __u64 inbytes, outbytes;
2102
2103 do {
57a7744e 2104 start = u64_stats_fetch_begin_irq(&u->syncp);
2a0751af
JA		 2105 inbytes = u->ustats.inbytes;
2106 outbytes = u->ustats.outbytes;
57a7744e 2107 } while (u64_stats_fetch_retry_irq(&u->syncp, start));
2a0751af 2108
b17fc996 2109 seq_printf(seq, "%3X %8X %8X %8X %16LX %16LX\n",
2a0751af
JA		 2110 i, u->ustats.conns, u->ustats.inpkts,
2111 u->ustats.outpkts, (__u64)inbytes,
2112 (__u64)outbytes);
b17fc996
HS		 2113 }
2114
2115 spin_lock_bh(&tot_stats->lock);
ea9f22cc 2116
b17fc996
HS		 2117 seq_printf(seq, " ~ %8X %8X %8X %16LX %16LX\n\n",
2118 tot_stats->ustats.conns, tot_stats->ustats.inpkts,
2119 tot_stats->ustats.outpkts,
2120 (unsigned long long) tot_stats->ustats.inbytes,
2121 (unsigned long long) tot_stats->ustats.outbytes);
2122
ea9f22cc
JA		 2123 ip_vs_read_estimator(&rates, tot_stats);
2124
2125 spin_unlock_bh(&tot_stats->lock);
2126
b17fc996
HS		 2127/* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2128 seq_puts(seq,
2129 " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
2130 seq_printf(seq, " %8X %8X %8X %16X %16X\n",
ea9f22cc
JA		 2131 rates.cps,
2132 rates.inpps,
2133 rates.outpps,
2134 rates.inbps,
2135 rates.outbps);
b17fc996
HS		 2136
2137 return 0;
2138}
2139
2140static int ip_vs_stats_percpu_seq_open(struct inode *inode, struct file *file)
2141{
2142 return single_open_net(inode, file, ip_vs_stats_percpu_show);
2143}
2144
2145static const struct file_operations ip_vs_stats_percpu_fops = {
2146 .owner = THIS_MODULE,
2147 .open = ip_vs_stats_percpu_seq_open,
2148 .read = seq_read,
2149 .llseek = seq_lseek,
0f08190f 2150 .release = single_release_net,
b17fc996 2151};
1da177e4
LT		 2152#endif
2153
2154/*
2155 * Set timeout values for tcp tcpfin udp in the timeout_table.
2156 */
9330419d 2157static int ip_vs_set_timeout(struct net *net, struct ip_vs_timeout_user *u)
1da177e4 2158{
091bb34c 2159#if defined(CONFIG_IP_VS_PROTO_TCP) || defined(CONFIG_IP_VS_PROTO_UDP)
9330419d 2160 struct ip_vs_proto_data *pd;
091bb34c 2161#endif
9330419d 2162
1da177e4
LT		 2163 IP_VS_DBG(2, "Setting timeout tcp:%d tcpfin:%d udp:%d\n",
2164 u->tcp_timeout,
2165 u->tcp_fin_timeout,
2166 u->udp_timeout);
2167
2168#ifdef CONFIG_IP_VS_PROTO_TCP
2169 if (u->tcp_timeout) {
9330419d
HS		 2170 pd = ip_vs_proto_data_get(net, IPPROTO_TCP);
2171 pd->timeout_table[IP_VS_TCP_S_ESTABLISHED]
1da177e4
LT		 2172 = u->tcp_timeout * HZ;
2173 }
2174
2175 if (u->tcp_fin_timeout) {
9330419d
HS		 2176 pd = ip_vs_proto_data_get(net, IPPROTO_TCP);
2177 pd->timeout_table[IP_VS_TCP_S_FIN_WAIT]
1da177e4
LT		 2178 = u->tcp_fin_timeout * HZ;
2179 }
2180#endif
2181
2182#ifdef CONFIG_IP_VS_PROTO_UDP
2183 if (u->udp_timeout) {
9330419d
HS		 2184 pd = ip_vs_proto_data_get(net, IPPROTO_UDP);
2185 pd->timeout_table[IP_VS_UDP_S_NORMAL]
1da177e4
LT		 2186 = u->udp_timeout * HZ;
2187 }
2188#endif
2189 return 0;
2190}
2191
5fcf0cf6 2192#define CMDID(cmd) (cmd - IP_VS_BASE_CTL)
1da177e4 2193
5fcf0cf6
JA		 2194struct ip_vs_svcdest_user {
2195 struct ip_vs_service_user s;
2196 struct ip_vs_dest_user d;
1da177e4
LT		 2197};
2198
5fcf0cf6
JA		 2199static const unsigned char set_arglen[CMDID(IP_VS_SO_SET_MAX) + 1] = {
2200 [CMDID(IP_VS_SO_SET_ADD)] = sizeof(struct ip_vs_service_user),
2201 [CMDID(IP_VS_SO_SET_EDIT)] = sizeof(struct ip_vs_service_user),
2202 [CMDID(IP_VS_SO_SET_DEL)] = sizeof(struct ip_vs_service_user),
2203 [CMDID(IP_VS_SO_SET_ADDDEST)] = sizeof(struct ip_vs_svcdest_user),
2204 [CMDID(IP_VS_SO_SET_DELDEST)] = sizeof(struct ip_vs_svcdest_user),
2205 [CMDID(IP_VS_SO_SET_EDITDEST)] = sizeof(struct ip_vs_svcdest_user),
2206 [CMDID(IP_VS_SO_SET_TIMEOUT)] = sizeof(struct ip_vs_timeout_user),
2207 [CMDID(IP_VS_SO_SET_STARTDAEMON)] = sizeof(struct ip_vs_daemon_user),
2208 [CMDID(IP_VS_SO_SET_STOPDAEMON)] = sizeof(struct ip_vs_daemon_user),
2209 [CMDID(IP_VS_SO_SET_ZERO)] = sizeof(struct ip_vs_service_user),
2210};
2211
2212union ip_vs_set_arglen {
2213 struct ip_vs_service_user field_IP_VS_SO_SET_ADD;
2214 struct ip_vs_service_user field_IP_VS_SO_SET_EDIT;
2215 struct ip_vs_service_user field_IP_VS_SO_SET_DEL;
2216 struct ip_vs_svcdest_user field_IP_VS_SO_SET_ADDDEST;
2217 struct ip_vs_svcdest_user field_IP_VS_SO_SET_DELDEST;
2218 struct ip_vs_svcdest_user field_IP_VS_SO_SET_EDITDEST;
2219 struct ip_vs_timeout_user field_IP_VS_SO_SET_TIMEOUT;
2220 struct ip_vs_daemon_user field_IP_VS_SO_SET_STARTDAEMON;
2221 struct ip_vs_daemon_user field_IP_VS_SO_SET_STOPDAEMON;
2222 struct ip_vs_service_user field_IP_VS_SO_SET_ZERO;
2223};
2224
2225#define MAX_SET_ARGLEN sizeof(union ip_vs_set_arglen)
2226
c860c6b1
JV		 2227static void ip_vs_copy_usvc_compat(struct ip_vs_service_user_kern *usvc,
2228 struct ip_vs_service_user *usvc_compat)
2229{
0d1e71b0
SH		 2230 memset(usvc, 0, sizeof(*usvc));
2231
c860c6b1
JV		 2232 usvc->af = AF_INET;
2233 usvc->protocol = usvc_compat->protocol;
2234 usvc->addr.ip = usvc_compat->addr;
2235 usvc->port = usvc_compat->port;
2236 usvc->fwmark = usvc_compat->fwmark;
2237
2238 /* Deep copy of sched_name is not needed here */
2239 usvc->sched_name = usvc_compat->sched_name;
2240
2241 usvc->flags = usvc_compat->flags;
2242 usvc->timeout = usvc_compat->timeout;
2243 usvc->netmask = usvc_compat->netmask;
2244}
2245
2246static void ip_vs_copy_udest_compat(struct ip_vs_dest_user_kern *udest,
2247 struct ip_vs_dest_user *udest_compat)
2248{
0d1e71b0
SH		 2249 memset(udest, 0, sizeof(*udest));
2250
c860c6b1
JV		 2251 udest->addr.ip = udest_compat->addr;
2252 udest->port = udest_compat->port;
2253 udest->conn_flags = udest_compat->conn_flags;
2254 udest->weight = udest_compat->weight;
2255 udest->u_threshold = udest_compat->u_threshold;
2256 udest->l_threshold = udest_compat->l_threshold;
6cff339b 2257 udest->af = AF_INET;
c860c6b1
JV		 2258}
2259
1da177e4
LT		 2260static int
2261do_ip_vs_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len)
2262{
fc723250 2263 struct net *net = sock_net(sk);
1da177e4 2264 int ret;
5fcf0cf6 2265 unsigned char arg[MAX_SET_ARGLEN];
c860c6b1
JV		 2266 struct ip_vs_service_user *usvc_compat;
2267 struct ip_vs_service_user_kern usvc;
1da177e4 2268 struct ip_vs_service *svc;
c860c6b1
JV		 2269 struct ip_vs_dest_user *udest_compat;
2270 struct ip_vs_dest_user_kern udest;
ae1d48b2 2271 struct netns_ipvs *ipvs = net_ipvs(net);
1da177e4 2272
5fcf0cf6 2273 BUILD_BUG_ON(sizeof(arg) > 255);
df008c91 2274 if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
1da177e4
LT		 2275 return -EPERM;
2276
04bcef2a
AV		 2277 if (cmd < IP_VS_BASE_CTL || cmd > IP_VS_SO_SET_MAX)
2278 return -EINVAL;
5fcf0cf6
JA		 2279 if (len != set_arglen[CMDID(cmd)]) {
2280 IP_VS_DBG(1, "set_ctl: len %u != %u\n",
2281 len, set_arglen[CMDID(cmd)]);
1da177e4
LT		 2282 return -EINVAL;
2283 }
2284
2285 if (copy_from_user(arg, user, len) != 0)
2286 return -EFAULT;
2287
2288 /* increase the module use count */
2289 ip_vs_use_count_inc();
2290
ae1d48b2
HS		 2291 /* Handle daemons since they have another lock */
2292 if (cmd == IP_VS_SO_SET_STARTDAEMON ||
2293 cmd == IP_VS_SO_SET_STOPDAEMON) {
2294 struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg;
2295
7926dbfa 2296 mutex_lock(&ipvs->sync_mutex);
ae1d48b2
HS		 2297 if (cmd == IP_VS_SO_SET_STARTDAEMON)
2298 ret = start_sync_thread(net, dm->state, dm->mcast_ifn,
2299 dm->syncid);
2300 else
2301 ret = stop_sync_thread(net, dm->state);
2302 mutex_unlock(&ipvs->sync_mutex);
2303 goto out_dec;
2304 }
2305
7926dbfa 2306 mutex_lock(&__ip_vs_mutex);
1da177e4
LT		 2307 if (cmd == IP_VS_SO_SET_FLUSH) {
2308 /* Flush the virtual service */
578bc3ef 2309 ret = ip_vs_flush(net, false);
1da177e4
LT		 2310 goto out_unlock;
2311 } else if (cmd == IP_VS_SO_SET_TIMEOUT) {
2312 /* Set timeout values for (tcp tcpfin udp) */
9330419d 2313 ret = ip_vs_set_timeout(net, (struct ip_vs_timeout_user *)arg);
1da177e4 2314 goto out_unlock;
1da177e4
LT		 2315 }
2316
c860c6b1
JV		 2317 usvc_compat = (struct ip_vs_service_user *)arg;
2318 udest_compat = (struct ip_vs_dest_user *)(usvc_compat + 1);
2319
2320 /* We only use the new structs internally, so copy userspace compat
2321 * structs to extended internal versions */
2322 ip_vs_copy_usvc_compat(&usvc, usvc_compat);
2323 ip_vs_copy_udest_compat(&udest, udest_compat);
1da177e4
LT		 2324
2325 if (cmd == IP_VS_SO_SET_ZERO) {
2326 /* if no service address is set, zero counters in all */
c860c6b1 2327 if (!usvc.fwmark && !usvc.addr.ip && !usvc.port) {
fc723250 2328 ret = ip_vs_zero_all(net);
1da177e4
LT		 2329 goto out_unlock;
2330 }
2331 }
2332
2906f66a
VMR		 2333 /* Check for valid protocol: TCP or UDP or SCTP, even for fwmark!=0 */
2334 if (usvc.protocol != IPPROTO_TCP && usvc.protocol != IPPROTO_UDP &&
2335 usvc.protocol != IPPROTO_SCTP) {
1e3e238e
HE		 2336 pr_err("set_ctl: invalid protocol: %d %pI4:%d %s\n",
2337 usvc.protocol, &usvc.addr.ip,
2338 ntohs(usvc.port), usvc.sched_name);
1da177e4
LT		 2339 ret = -EFAULT;
2340 goto out_unlock;
2341 }
2342
2343 /* Lookup the exact service by <protocol, addr, port> or fwmark */
ceec4c38 2344 rcu_read_lock();
c860c6b1 2345 if (usvc.fwmark == 0)
fc723250 2346 svc = __ip_vs_service_find(net, usvc.af, usvc.protocol,
26c15cfd 2347 &usvc.addr, usvc.port);
1da177e4 2348 else
fc723250 2349 svc = __ip_vs_svc_fwm_find(net, usvc.af, usvc.fwmark);
ceec4c38 2350 rcu_read_unlock();
1da177e4
LT		 2351
2352 if (cmd != IP_VS_SO_SET_ADD
c860c6b1 2353 && (svc == NULL || svc->protocol != usvc.protocol)) {
1da177e4 2354 ret = -ESRCH;
26c15cfd 2355 goto out_unlock;
1da177e4
LT		 2356 }
2357
2358 switch (cmd) {
2359 case IP_VS_SO_SET_ADD:
2360 if (svc != NULL)
2361 ret = -EEXIST;
2362 else
fc723250 2363 ret = ip_vs_add_service(net, &usvc, &svc);
1da177e4
LT		 2364 break;
2365 case IP_VS_SO_SET_EDIT:
c860c6b1 2366 ret = ip_vs_edit_service(svc, &usvc);
1da177e4
LT		 2367 break;
2368 case IP_VS_SO_SET_DEL:
2369 ret = ip_vs_del_service(svc);
2370 if (!ret)
2371 goto out_unlock;
2372 break;
2373 case IP_VS_SO_SET_ZERO:
2374 ret = ip_vs_zero_service(svc);
2375 break;
2376 case IP_VS_SO_SET_ADDDEST:
c860c6b1 2377 ret = ip_vs_add_dest(svc, &udest);
1da177e4
LT		 2378 break;
2379 case IP_VS_SO_SET_EDITDEST:
c860c6b1 2380 ret = ip_vs_edit_dest(svc, &udest);
1da177e4
LT		 2381 break;
2382 case IP_VS_SO_SET_DELDEST:
c860c6b1 2383 ret = ip_vs_del_dest(svc, &udest);
1da177e4
LT		 2384 break;
2385 default:
2386 ret = -EINVAL;
2387 }
2388
1da177e4 2389 out_unlock:
14cc3e2b 2390 mutex_unlock(&__ip_vs_mutex);
1da177e4
LT		 2391 out_dec:
2392 /* decrease the module use count */
2393 ip_vs_use_count_dec();
2394
2395 return ret;
2396}
2397
2398
1da177e4
LT		 2399static void
2400ip_vs_copy_service(struct ip_vs_service_entry *dst, struct ip_vs_service *src)
2401{
ceec4c38
JA		 2402 struct ip_vs_scheduler *sched;
2403
2404 sched = rcu_dereference_protected(src->scheduler, 1);
1da177e4 2405 dst->protocol = src->protocol;
e7ade46a 2406 dst->addr = src->addr.ip;
1da177e4
LT		 2407 dst->port = src->port;
2408 dst->fwmark = src->fwmark;
ceec4c38 2409 strlcpy(dst->sched_name, sched->name, sizeof(dst->sched_name));
1da177e4
LT		 2410 dst->flags = src->flags;
2411 dst->timeout = src->timeout / HZ;
2412 dst->netmask = src->netmask;
2413 dst->num_dests = src->num_dests;
2414 ip_vs_copy_stats(&dst->stats, &src->stats);
2415}
2416
2417static inline int
fc723250
HS		 2418__ip_vs_get_service_entries(struct net *net,
2419 const struct ip_vs_get_services *get,
1da177e4
LT		 2420 struct ip_vs_get_services __user *uptr)
2421{
2422 int idx, count=0;
2423 struct ip_vs_service *svc;
2424 struct ip_vs_service_entry entry;
2425 int ret = 0;
2426
2427 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38 2428 hlist_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
f94fd041 2429 /* Only expose IPv4 entries to old interface */
fc723250 2430 if (svc->af != AF_INET || !net_eq(svc->net, net))
f94fd041
JV		 2431 continue;
2432
1da177e4
LT		 2433 if (count >= get->num_services)
2434 goto out;
4da62fc7 2435 memset(&entry, 0, sizeof(entry));
1da177e4
LT		 2436 ip_vs_copy_service(&entry, svc);
2437 if (copy_to_user(&uptr->entrytable[count],
2438 &entry, sizeof(entry))) {
2439 ret = -EFAULT;
2440 goto out;
2441 }
2442 count++;
2443 }
2444 }
2445
2446 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38 2447 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
f94fd041 2448 /* Only expose IPv4 entries to old interface */
fc723250 2449 if (svc->af != AF_INET || !net_eq(svc->net, net))
f94fd041
JV		 2450 continue;
2451
1da177e4
LT		 2452 if (count >= get->num_services)
2453 goto out;
4da62fc7 2454 memset(&entry, 0, sizeof(entry));
1da177e4
LT		 2455 ip_vs_copy_service(&entry, svc);
2456 if (copy_to_user(&uptr->entrytable[count],
2457 &entry, sizeof(entry))) {
2458 ret = -EFAULT;
2459 goto out;
2460 }
2461 count++;
2462 }
2463 }
552ad65a 2464out:
1da177e4
LT		 2465 return ret;
2466}
2467
2468static inline int
fc723250 2469__ip_vs_get_dest_entries(struct net *net, const struct ip_vs_get_dests *get,
1da177e4
LT		 2470 struct ip_vs_get_dests __user *uptr)
2471{
2472 struct ip_vs_service *svc;
b18610de 2473 union nf_inet_addr addr = { .ip = get->addr };
1da177e4
LT		 2474 int ret = 0;
2475
ceec4c38 2476 rcu_read_lock();
1da177e4 2477 if (get->fwmark)
fc723250 2478 svc = __ip_vs_svc_fwm_find(net, AF_INET, get->fwmark);
1da177e4 2479 else
fc723250 2480 svc = __ip_vs_service_find(net, AF_INET, get->protocol, &addr,
26c15cfd 2481 get->port);
ceec4c38 2482 rcu_read_unlock();
b18610de 2483
1da177e4
LT		 2484 if (svc) {
2485 int count = 0;
2486 struct ip_vs_dest *dest;
2487 struct ip_vs_dest_entry entry;
2488
a8241c63 2489 memset(&entry, 0, sizeof(entry));
1da177e4
LT		 2490 list_for_each_entry(dest, &svc->destinations, n_list) {
2491 if (count >= get->num_dests)
2492 break;
2493
6cff339b
AG		 2494 /* Cannot expose heterogeneous members via sockopt
2495 * interface
2496 */
2497 if (dest->af != svc->af)
2498 continue;
2499
e7ade46a 2500 entry.addr = dest->addr.ip;
1da177e4
LT		 2501 entry.port = dest->port;
2502 entry.conn_flags = atomic_read(&dest->conn_flags);
2503 entry.weight = atomic_read(&dest->weight);
2504 entry.u_threshold = dest->u_threshold;
2505 entry.l_threshold = dest->l_threshold;
2506 entry.activeconns = atomic_read(&dest->activeconns);
2507 entry.inactconns = atomic_read(&dest->inactconns);
2508 entry.persistconns = atomic_read(&dest->persistconns);
2509 ip_vs_copy_stats(&entry.stats, &dest->stats);
2510 if (copy_to_user(&uptr->entrytable[count],
2511 &entry, sizeof(entry))) {
2512 ret = -EFAULT;
2513 break;
2514 }
2515 count++;
2516 }
1da177e4
LT		 2517 } else
2518 ret = -ESRCH;
2519 return ret;
2520}
2521
2522static inline void
9330419d 2523__ip_vs_get_timeouts(struct net *net, struct ip_vs_timeout_user *u)
1da177e4 2524{
091bb34c 2525#if defined(CONFIG_IP_VS_PROTO_TCP) || defined(CONFIG_IP_VS_PROTO_UDP)
9330419d 2526 struct ip_vs_proto_data *pd;
091bb34c 2527#endif
9330419d 2528
b61a602e
AB		 2529 memset(u, 0, sizeof (*u));
2530
1da177e4 2531#ifdef CONFIG_IP_VS_PROTO_TCP
9330419d
HS		 2532 pd = ip_vs_proto_data_get(net, IPPROTO_TCP);
2533 u->tcp_timeout = pd->timeout_table[IP_VS_TCP_S_ESTABLISHED] / HZ;
2534 u->tcp_fin_timeout = pd->timeout_table[IP_VS_TCP_S_FIN_WAIT] / HZ;
1da177e4
LT		 2535#endif
2536#ifdef CONFIG_IP_VS_PROTO_UDP
9330419d 2537 pd = ip_vs_proto_data_get(net, IPPROTO_UDP);
1da177e4 2538 u->udp_timeout =
9330419d 2539 pd->timeout_table[IP_VS_UDP_S_NORMAL] / HZ;
1da177e4
LT		 2540#endif
2541}
2542
5fcf0cf6
JA		 2543static const unsigned char get_arglen[CMDID(IP_VS_SO_GET_MAX) + 1] = {
2544 [CMDID(IP_VS_SO_GET_VERSION)] = 64,
2545 [CMDID(IP_VS_SO_GET_INFO)] = sizeof(struct ip_vs_getinfo),
2546 [CMDID(IP_VS_SO_GET_SERVICES)] = sizeof(struct ip_vs_get_services),
2547 [CMDID(IP_VS_SO_GET_SERVICE)] = sizeof(struct ip_vs_service_entry),
2548 [CMDID(IP_VS_SO_GET_DESTS)] = sizeof(struct ip_vs_get_dests),
2549 [CMDID(IP_VS_SO_GET_TIMEOUT)] = sizeof(struct ip_vs_timeout_user),
2550 [CMDID(IP_VS_SO_GET_DAEMON)] = 2 * sizeof(struct ip_vs_daemon_user),
2551};
1da177e4 2552
5fcf0cf6
JA		 2553union ip_vs_get_arglen {
2554 char field_IP_VS_SO_GET_VERSION[64];
2555 struct ip_vs_getinfo field_IP_VS_SO_GET_INFO;
2556 struct ip_vs_get_services field_IP_VS_SO_GET_SERVICES;
2557 struct ip_vs_service_entry field_IP_VS_SO_GET_SERVICE;
2558 struct ip_vs_get_dests field_IP_VS_SO_GET_DESTS;
2559 struct ip_vs_timeout_user field_IP_VS_SO_GET_TIMEOUT;
2560 struct ip_vs_daemon_user field_IP_VS_SO_GET_DAEMON[2];
1da177e4
LT		 2561};
2562
5fcf0cf6
JA		 2563#define MAX_GET_ARGLEN sizeof(union ip_vs_get_arglen)
2564
1da177e4
LT		 2565static int
2566do_ip_vs_get_ctl(struct sock *sk, int cmd, void __user *user, int *len)
2567{
5fcf0cf6 2568 unsigned char arg[MAX_GET_ARGLEN];
1da177e4 2569 int ret = 0;
04bcef2a 2570 unsigned int copylen;
fc723250 2571 struct net *net = sock_net(sk);
f131315f 2572 struct netns_ipvs *ipvs = net_ipvs(net);
1da177e4 2573
fc723250 2574 BUG_ON(!net);
5fcf0cf6 2575 BUILD_BUG_ON(sizeof(arg) > 255);
df008c91 2576 if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
1da177e4
LT		 2577 return -EPERM;
2578
04bcef2a
AV		 2579 if (cmd < IP_VS_BASE_CTL || cmd > IP_VS_SO_GET_MAX)
2580 return -EINVAL;
2581
5fcf0cf6
JA		 2582 copylen = get_arglen[CMDID(cmd)];
2583 if (*len < (int) copylen) {
2584 IP_VS_DBG(1, "get_ctl: len %d < %u\n", *len, copylen);
1da177e4
LT		 2585 return -EINVAL;
2586 }
2587
04bcef2a 2588 if (copy_from_user(arg, user, copylen) != 0)
1da177e4 2589 return -EFAULT;
ae1d48b2
HS		 2590 /*
2591 * Handle daemons first since it has its own locking
2592 */
2593 if (cmd == IP_VS_SO_GET_DAEMON) {
2594 struct ip_vs_daemon_user d[2];
2595
2596 memset(&d, 0, sizeof(d));
7926dbfa 2597 mutex_lock(&ipvs->sync_mutex);
ae1d48b2
HS		 2598 if (ipvs->sync_state & IP_VS_STATE_MASTER) {
2599 d[0].state = IP_VS_STATE_MASTER;
2600 strlcpy(d[0].mcast_ifn, ipvs->master_mcast_ifn,
2601 sizeof(d[0].mcast_ifn));
2602 d[0].syncid = ipvs->master_syncid;
2603 }
2604 if (ipvs->sync_state & IP_VS_STATE_BACKUP) {
2605 d[1].state = IP_VS_STATE_BACKUP;
2606 strlcpy(d[1].mcast_ifn, ipvs->backup_mcast_ifn,
2607 sizeof(d[1].mcast_ifn));
2608 d[1].syncid = ipvs->backup_syncid;
2609 }
2610 if (copy_to_user(user, &d, sizeof(d)) != 0)
2611 ret = -EFAULT;
2612 mutex_unlock(&ipvs->sync_mutex);
2613 return ret;
2614 }
1da177e4 2615
7926dbfa 2616 mutex_lock(&__ip_vs_mutex);
1da177e4
LT		 2617 switch (cmd) {
2618 case IP_VS_SO_GET_VERSION:
2619 {
2620 char buf[64];
2621
2622 sprintf(buf, "IP Virtual Server version %d.%d.%d (size=%d)",
6f7edb48 2623 NVERSION(IP_VS_VERSION_CODE), ip_vs_conn_tab_size);
1da177e4
LT		 2624 if (copy_to_user(user, buf, strlen(buf)+1) != 0) {
2625 ret = -EFAULT;
2626 goto out;
2627 }
2628 *len = strlen(buf)+1;
2629 }
2630 break;
2631
2632 case IP_VS_SO_GET_INFO:
2633 {
2634 struct ip_vs_getinfo info;
2635 info.version = IP_VS_VERSION_CODE;
6f7edb48 2636 info.size = ip_vs_conn_tab_size;
a0840e2e 2637 info.num_services = ipvs->num_services;
1da177e4
LT		 2638 if (copy_to_user(user, &info, sizeof(info)) != 0)
2639 ret = -EFAULT;
2640 }
2641 break;
2642
2643 case IP_VS_SO_GET_SERVICES:
2644 {
2645 struct ip_vs_get_services *get;
2646 int size;
2647
2648 get = (struct ip_vs_get_services *)arg;
2649 size = sizeof(*get) +
2650 sizeof(struct ip_vs_service_entry) * get->num_services;
2651 if (*len != size) {
1e3e238e 2652 pr_err("length: %u != %u\n", *len, size);
1da177e4
LT		 2653 ret = -EINVAL;
2654 goto out;
2655 }
fc723250 2656 ret = __ip_vs_get_service_entries(net, get, user);
1da177e4
LT		 2657 }
2658 break;
2659
2660 case IP_VS_SO_GET_SERVICE:
2661 {
2662 struct ip_vs_service_entry *entry;
2663 struct ip_vs_service *svc;
b18610de 2664 union nf_inet_addr addr;
1da177e4
LT		 2665
2666 entry = (struct ip_vs_service_entry *)arg;
b18610de 2667 addr.ip = entry->addr;
ceec4c38 2668 rcu_read_lock();
1da177e4 2669 if (entry->fwmark)
fc723250 2670 svc = __ip_vs_svc_fwm_find(net, AF_INET, entry->fwmark);
1da177e4 2671 else
fc723250
HS		 2672 svc = __ip_vs_service_find(net, AF_INET,
2673 entry->protocol, &addr,
2674 entry->port);
ceec4c38 2675 rcu_read_unlock();
1da177e4
LT		 2676 if (svc) {
2677 ip_vs_copy_service(entry, svc);
2678 if (copy_to_user(user, entry, sizeof(*entry)) != 0)
2679 ret = -EFAULT;
1da177e4
LT		 2680 } else
2681 ret = -ESRCH;
2682 }
2683 break;
2684
2685 case IP_VS_SO_GET_DESTS:
2686 {
2687 struct ip_vs_get_dests *get;
2688 int size;
2689
2690 get = (struct ip_vs_get_dests *)arg;
2691 size = sizeof(*get) +
2692 sizeof(struct ip_vs_dest_entry) * get->num_dests;
2693 if (*len != size) {
1e3e238e 2694 pr_err("length: %u != %u\n", *len, size);
1da177e4
LT		 2695 ret = -EINVAL;
2696 goto out;
2697 }
fc723250 2698 ret = __ip_vs_get_dest_entries(net, get, user);
1da177e4
LT		 2699 }
2700 break;
2701
2702 case IP_VS_SO_GET_TIMEOUT:
2703 {
2704 struct ip_vs_timeout_user t;
2705
9330419d 2706 __ip_vs_get_timeouts(net, &t);
1da177e4
LT		 2707 if (copy_to_user(user, &t, sizeof(t)) != 0)
2708 ret = -EFAULT;
2709 }
2710 break;
2711
1da177e4
LT		 2712 default:
2713 ret = -EINVAL;
2714 }
2715
552ad65a 2716out:
14cc3e2b 2717 mutex_unlock(&__ip_vs_mutex);
1da177e4
LT		 2718 return ret;
2719}
2720
2721
2722static struct nf_sockopt_ops ip_vs_sockopts = {
2723 .pf = PF_INET,
2724 .set_optmin = IP_VS_BASE_CTL,
2725 .set_optmax = IP_VS_SO_SET_MAX+1,
2726 .set = do_ip_vs_set_ctl,
2727 .get_optmin = IP_VS_BASE_CTL,
2728 .get_optmax = IP_VS_SO_GET_MAX+1,
2729 .get = do_ip_vs_get_ctl,
16fcec35 2730 .owner = THIS_MODULE,
1da177e4
LT		 2731};
2732
9a812198
JV		 2733/*
2734 * Generic Netlink interface
2735 */
2736
2737/* IPVS genetlink family */
2738static struct genl_family ip_vs_genl_family = {
2739 .id = GENL_ID_GENERATE,
2740 .hdrsize = 0,
2741 .name = IPVS_GENL_NAME,
2742 .version = IPVS_GENL_VERSION,
2743 .maxattr = IPVS_CMD_MAX,
c6d2d445 2744 .netnsok = true, /* Make ipvsadm to work on netns */
9a812198
JV		 2745};
2746
2747/* Policy used for first-level command attributes */
2748static const struct nla_policy ip_vs_cmd_policy[IPVS_CMD_ATTR_MAX + 1] = {
2749 [IPVS_CMD_ATTR_SERVICE] = { .type = NLA_NESTED },
2750 [IPVS_CMD_ATTR_DEST] = { .type = NLA_NESTED },
2751 [IPVS_CMD_ATTR_DAEMON] = { .type = NLA_NESTED },
2752 [IPVS_CMD_ATTR_TIMEOUT_TCP] = { .type = NLA_U32 },
2753 [IPVS_CMD_ATTR_TIMEOUT_TCP_FIN] = { .type = NLA_U32 },
2754 [IPVS_CMD_ATTR_TIMEOUT_UDP] = { .type = NLA_U32 },
2755};
2756
2757/* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DAEMON */
2758static const struct nla_policy ip_vs_daemon_policy[IPVS_DAEMON_ATTR_MAX + 1] = {
2759 [IPVS_DAEMON_ATTR_STATE] = { .type = NLA_U32 },
2760 [IPVS_DAEMON_ATTR_MCAST_IFN] = { .type = NLA_NUL_STRING,
2761 .len = IP_VS_IFNAME_MAXLEN },
2762 [IPVS_DAEMON_ATTR_SYNC_ID] = { .type = NLA_U32 },
2763};
2764
2765/* Policy used for attributes in nested attribute IPVS_CMD_ATTR_SERVICE */
2766static const struct nla_policy ip_vs_svc_policy[IPVS_SVC_ATTR_MAX + 1] = {
2767 [IPVS_SVC_ATTR_AF] = { .type = NLA_U16 },
2768 [IPVS_SVC_ATTR_PROTOCOL] = { .type = NLA_U16 },
2769 [IPVS_SVC_ATTR_ADDR] = { .type = NLA_BINARY,
2770 .len = sizeof(union nf_inet_addr) },
2771 [IPVS_SVC_ATTR_PORT] = { .type = NLA_U16 },
2772 [IPVS_SVC_ATTR_FWMARK] = { .type = NLA_U32 },
2773 [IPVS_SVC_ATTR_SCHED_NAME] = { .type = NLA_NUL_STRING,
2774 .len = IP_VS_SCHEDNAME_MAXLEN },
0d1e71b0
SH		 2775 [IPVS_SVC_ATTR_PE_NAME] = { .type = NLA_NUL_STRING,
2776 .len = IP_VS_PENAME_MAXLEN },
9a812198
JV		 2777 [IPVS_SVC_ATTR_FLAGS] = { .type = NLA_BINARY,
2778 .len = sizeof(struct ip_vs_flags) },
2779 [IPVS_SVC_ATTR_TIMEOUT] = { .type = NLA_U32 },
2780 [IPVS_SVC_ATTR_NETMASK] = { .type = NLA_U32 },
2781 [IPVS_SVC_ATTR_STATS] = { .type = NLA_NESTED },
2782};
2783
2784/* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DEST */
2785static const struct nla_policy ip_vs_dest_policy[IPVS_DEST_ATTR_MAX + 1] = {
2786 [IPVS_DEST_ATTR_ADDR] = { .type = NLA_BINARY,
2787 .len = sizeof(union nf_inet_addr) },
2788 [IPVS_DEST_ATTR_PORT] = { .type = NLA_U16 },
2789 [IPVS_DEST_ATTR_FWD_METHOD] = { .type = NLA_U32 },
2790 [IPVS_DEST_ATTR_WEIGHT] = { .type = NLA_U32 },
2791 [IPVS_DEST_ATTR_U_THRESH] = { .type = NLA_U32 },
2792 [IPVS_DEST_ATTR_L_THRESH] = { .type = NLA_U32 },
2793 [IPVS_DEST_ATTR_ACTIVE_CONNS] = { .type = NLA_U32 },
2794 [IPVS_DEST_ATTR_INACT_CONNS] = { .type = NLA_U32 },
2795 [IPVS_DEST_ATTR_PERSIST_CONNS] = { .type = NLA_U32 },
2796 [IPVS_DEST_ATTR_STATS] = { .type = NLA_NESTED },
6cff339b 2797 [IPVS_DEST_ATTR_ADDR_FAMILY] = { .type = NLA_U16 },
9a812198
JV		 2798};
2799
2800static int ip_vs_genl_fill_stats(struct sk_buff *skb, int container_type,
2801 struct ip_vs_stats *stats)
2802{
55a3d4e1 2803 struct ip_vs_stats_user ustats;
9a812198
JV		 2804 struct nlattr *nl_stats = nla_nest_start(skb, container_type);
2805 if (!nl_stats)
2806 return -EMSGSIZE;
2807
55a3d4e1 2808 ip_vs_copy_stats(&ustats, stats);
9a812198 2809
969e8e25
DM		 2810 if (nla_put_u32(skb, IPVS_STATS_ATTR_CONNS, ustats.conns) ||
2811 nla_put_u32(skb, IPVS_STATS_ATTR_INPKTS, ustats.inpkts) ||
2812 nla_put_u32(skb, IPVS_STATS_ATTR_OUTPKTS, ustats.outpkts) ||
2813 nla_put_u64(skb, IPVS_STATS_ATTR_INBYTES, ustats.inbytes) ||
2814 nla_put_u64(skb, IPVS_STATS_ATTR_OUTBYTES, ustats.outbytes) ||
2815 nla_put_u32(skb, IPVS_STATS_ATTR_CPS, ustats.cps) ||
2816 nla_put_u32(skb, IPVS_STATS_ATTR_INPPS, ustats.inpps) ||
2817 nla_put_u32(skb, IPVS_STATS_ATTR_OUTPPS, ustats.outpps) ||
2818 nla_put_u32(skb, IPVS_STATS_ATTR_INBPS, ustats.inbps) ||
2819 nla_put_u32(skb, IPVS_STATS_ATTR_OUTBPS, ustats.outbps))
2820 goto nla_put_failure;
9a812198
JV		 2821 nla_nest_end(skb, nl_stats);
2822
2823 return 0;
2824
2825nla_put_failure:
9a812198
JV		 2826 nla_nest_cancel(skb, nl_stats);
2827 return -EMSGSIZE;
2828}
2829
2830static int ip_vs_genl_fill_service(struct sk_buff *skb,
2831 struct ip_vs_service *svc)
2832{
ceec4c38 2833 struct ip_vs_scheduler *sched;
371990ee 2834 struct ip_vs_pe *pe;
9a812198
JV		 2835 struct nlattr *nl_service;
2836 struct ip_vs_flags flags = { .flags = svc->flags,
2837 .mask = ~0 };
2838
2839 nl_service = nla_nest_start(skb, IPVS_CMD_ATTR_SERVICE);
2840 if (!nl_service)
2841 return -EMSGSIZE;
2842
969e8e25
DM		 2843 if (nla_put_u16(skb, IPVS_SVC_ATTR_AF, svc->af))
2844 goto nla_put_failure;
9a812198 2845 if (svc->fwmark) {
969e8e25
DM		 2846 if (nla_put_u32(skb, IPVS_SVC_ATTR_FWMARK, svc->fwmark))
2847 goto nla_put_failure;
9a812198 2848 } else {
969e8e25
DM		 2849 if (nla_put_u16(skb, IPVS_SVC_ATTR_PROTOCOL, svc->protocol) ||
2850 nla_put(skb, IPVS_SVC_ATTR_ADDR, sizeof(svc->addr), &svc->addr) ||
0a925864 2851 nla_put_be16(skb, IPVS_SVC_ATTR_PORT, svc->port))
969e8e25 2852 goto nla_put_failure;
9a812198
JV		 2853 }
2854
ceec4c38 2855 sched = rcu_dereference_protected(svc->scheduler, 1);
371990ee 2856 pe = rcu_dereference_protected(svc->pe, 1);
ceec4c38 2857 if (nla_put_string(skb, IPVS_SVC_ATTR_SCHED_NAME, sched->name) ||
371990ee 2858 (pe && nla_put_string(skb, IPVS_SVC_ATTR_PE_NAME, pe->name)) ||
969e8e25
DM		 2859 nla_put(skb, IPVS_SVC_ATTR_FLAGS, sizeof(flags), &flags) ||
2860 nla_put_u32(skb, IPVS_SVC_ATTR_TIMEOUT, svc->timeout / HZ) ||
0a925864 2861 nla_put_be32(skb, IPVS_SVC_ATTR_NETMASK, svc->netmask))
969e8e25 2862 goto nla_put_failure;
9a812198
JV		 2863 if (ip_vs_genl_fill_stats(skb, IPVS_SVC_ATTR_STATS, &svc->stats))
2864 goto nla_put_failure;
2865
2866 nla_nest_end(skb, nl_service);
2867
2868 return 0;
2869
2870nla_put_failure:
2871 nla_nest_cancel(skb, nl_service);
2872 return -EMSGSIZE;
2873}
2874
2875static int ip_vs_genl_dump_service(struct sk_buff *skb,
2876 struct ip_vs_service *svc,
2877 struct netlink_callback *cb)
2878{
2879 void *hdr;
2880
15e47304 2881 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
9a812198
JV		 2882 &ip_vs_genl_family, NLM_F_MULTI,
2883 IPVS_CMD_NEW_SERVICE);
2884 if (!hdr)
2885 return -EMSGSIZE;
2886
2887 if (ip_vs_genl_fill_service(skb, svc) < 0)
2888 goto nla_put_failure;
2889
053c095a
JB		 2890 genlmsg_end(skb, hdr);
2891 return 0;
9a812198
JV		 2892
2893nla_put_failure:
2894 genlmsg_cancel(skb, hdr);
2895 return -EMSGSIZE;
2896}
2897
2898static int ip_vs_genl_dump_services(struct sk_buff *skb,
2899 struct netlink_callback *cb)
2900{
2901 int idx = 0, i;
2902 int start = cb->args[0];
2903 struct ip_vs_service *svc;
fc723250 2904 struct net *net = skb_sknet(skb);
9a812198
JV		 2905
2906 mutex_lock(&__ip_vs_mutex);
2907 for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) {
ceec4c38 2908 hlist_for_each_entry(svc, &ip_vs_svc_table[i], s_list) {
fc723250 2909 if (++idx <= start || !net_eq(svc->net, net))
9a812198
JV		 2910 continue;
2911 if (ip_vs_genl_dump_service(skb, svc, cb) < 0) {
2912 idx--;
2913 goto nla_put_failure;
2914 }
2915 }
2916 }
2917
2918 for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) {
ceec4c38 2919 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[i], f_list) {
fc723250 2920 if (++idx <= start || !net_eq(svc->net, net))
9a812198
JV		 2921 continue;
2922 if (ip_vs_genl_dump_service(skb, svc, cb) < 0) {
2923 idx--;
2924 goto nla_put_failure;
2925 }
2926 }
2927 }
2928
2929nla_put_failure:
2930 mutex_unlock(&__ip_vs_mutex);
2931 cb->args[0] = idx;
2932
2933 return skb->len;
2934}
2935
fc723250
HS		 2936static int ip_vs_genl_parse_service(struct net *net,
2937 struct ip_vs_service_user_kern *usvc,
26c15cfd
JA		 2938 struct nlattr *nla, int full_entry,
2939 struct ip_vs_service **ret_svc)
9a812198
JV		 2940{
2941 struct nlattr *attrs[IPVS_SVC_ATTR_MAX + 1];
2942 struct nlattr *nla_af, *nla_port, *nla_fwmark, *nla_protocol, *nla_addr;
26c15cfd 2943 struct ip_vs_service *svc;
9a812198
JV		 2944
2945 /* Parse mandatory identifying service fields first */
2946 if (nla == NULL ||
2947 nla_parse_nested(attrs, IPVS_SVC_ATTR_MAX, nla, ip_vs_svc_policy))
2948 return -EINVAL;
2949
2950 nla_af = attrs[IPVS_SVC_ATTR_AF];
2951 nla_protocol = attrs[IPVS_SVC_ATTR_PROTOCOL];
2952 nla_addr = attrs[IPVS_SVC_ATTR_ADDR];
2953 nla_port = attrs[IPVS_SVC_ATTR_PORT];
2954 nla_fwmark = attrs[IPVS_SVC_ATTR_FWMARK];
2955
2956 if (!(nla_af && (nla_fwmark || (nla_port && nla_protocol && nla_addr))))
2957 return -EINVAL;
2958
258c8893
SH		 2959 memset(usvc, 0, sizeof(*usvc));
2960
c860c6b1 2961 usvc->af = nla_get_u16(nla_af);
f94fd041
JV		 2962#ifdef CONFIG_IP_VS_IPV6
2963 if (usvc->af != AF_INET && usvc->af != AF_INET6)
2964#else
2965 if (usvc->af != AF_INET)
2966#endif
9a812198
JV		 2967 return -EAFNOSUPPORT;
2968
2969 if (nla_fwmark) {
2970 usvc->protocol = IPPROTO_TCP;
2971 usvc->fwmark = nla_get_u32(nla_fwmark);
2972 } else {
2973 usvc->protocol = nla_get_u16(nla_protocol);
2974 nla_memcpy(&usvc->addr, nla_addr, sizeof(usvc->addr));
0a925864 2975 usvc->port = nla_get_be16(nla_port);
9a812198
JV		 2976 usvc->fwmark = 0;
2977 }
2978
ceec4c38 2979 rcu_read_lock();
26c15cfd 2980 if (usvc->fwmark)
fc723250 2981 svc = __ip_vs_svc_fwm_find(net, usvc->af, usvc->fwmark);
26c15cfd 2982 else
fc723250 2983 svc = __ip_vs_service_find(net, usvc->af, usvc->protocol,
26c15cfd 2984 &usvc->addr, usvc->port);
ceec4c38 2985 rcu_read_unlock();
26c15cfd
JA		 2986 *ret_svc = svc;
2987
9a812198
JV		 2988 /* If a full entry was requested, check for the additional fields */
2989 if (full_entry) {
0d1e71b0 2990 struct nlattr *nla_sched, *nla_flags, *nla_pe, *nla_timeout,
9a812198
JV		 2991 *nla_netmask;
2992 struct ip_vs_flags flags;
9a812198
JV		 2993
2994 nla_sched = attrs[IPVS_SVC_ATTR_SCHED_NAME];
0d1e71b0 2995 nla_pe = attrs[IPVS_SVC_ATTR_PE_NAME];
9a812198
JV		 2996 nla_flags = attrs[IPVS_SVC_ATTR_FLAGS];
2997 nla_timeout = attrs[IPVS_SVC_ATTR_TIMEOUT];
2998 nla_netmask = attrs[IPVS_SVC_ATTR_NETMASK];
2999
3000 if (!(nla_sched && nla_flags && nla_timeout && nla_netmask))
3001 return -EINVAL;
3002
3003 nla_memcpy(&flags, nla_flags, sizeof(flags));
3004
3005 /* prefill flags from service if it already exists */
26c15cfd 3006 if (svc)
9a812198 3007 usvc->flags = svc->flags;
9a812198
JV		 3008
3009 /* set new flags from userland */
3010 usvc->flags = (usvc->flags & ~flags.mask) |
3011 (flags.flags & flags.mask);
c860c6b1 3012 usvc->sched_name = nla_data(nla_sched);
0d1e71b0 3013 usvc->pe_name = nla_pe ? nla_data(nla_pe) : NULL;
9a812198 3014 usvc->timeout = nla_get_u32(nla_timeout);
0a925864 3015 usvc->netmask = nla_get_be32(nla_netmask);
9a812198
JV		 3016 }
3017
3018 return 0;
3019}
3020
fc723250
HS		 3021static struct ip_vs_service *ip_vs_genl_find_service(struct net *net,
3022 struct nlattr *nla)
9a812198 3023{
c860c6b1 3024 struct ip_vs_service_user_kern usvc;
26c15cfd 3025 struct ip_vs_service *svc;
9a812198
JV		 3026 int ret;
3027
fc723250 3028 ret = ip_vs_genl_parse_service(net, &usvc, nla, 0, &svc);
26c15cfd 3029 return ret ? ERR_PTR(ret) : svc;
9a812198
JV		 3030}
3031
3032static int ip_vs_genl_fill_dest(struct sk_buff *skb, struct ip_vs_dest *dest)
3033{
3034 struct nlattr *nl_dest;
3035
3036 nl_dest = nla_nest_start(skb, IPVS_CMD_ATTR_DEST);
3037 if (!nl_dest)
3038 return -EMSGSIZE;
3039
969e8e25 3040 if (nla_put(skb, IPVS_DEST_ATTR_ADDR, sizeof(dest->addr), &dest->addr) ||
0a925864 3041 nla_put_be16(skb, IPVS_DEST_ATTR_PORT, dest->port) ||
969e8e25
DM		 3042 nla_put_u32(skb, IPVS_DEST_ATTR_FWD_METHOD,
3043 (atomic_read(&dest->conn_flags) &
3044 IP_VS_CONN_F_FWD_MASK)) ||
3045 nla_put_u32(skb, IPVS_DEST_ATTR_WEIGHT,
3046 atomic_read(&dest->weight)) ||
3047 nla_put_u32(skb, IPVS_DEST_ATTR_U_THRESH, dest->u_threshold) ||
3048 nla_put_u32(skb, IPVS_DEST_ATTR_L_THRESH, dest->l_threshold) ||
3049 nla_put_u32(skb, IPVS_DEST_ATTR_ACTIVE_CONNS,
3050 atomic_read(&dest->activeconns)) ||
3051 nla_put_u32(skb, IPVS_DEST_ATTR_INACT_CONNS,
3052 atomic_read(&dest->inactconns)) ||
3053 nla_put_u32(skb, IPVS_DEST_ATTR_PERSIST_CONNS,
6cff339b
AG		 3054 atomic_read(&dest->persistconns)) ||
3055 nla_put_u16(skb, IPVS_DEST_ATTR_ADDR_FAMILY, dest->af))
969e8e25 3056 goto nla_put_failure;
9a812198
JV		 3057 if (ip_vs_genl_fill_stats(skb, IPVS_DEST_ATTR_STATS, &dest->stats))
3058 goto nla_put_failure;
3059
3060 nla_nest_end(skb, nl_dest);
3061
3062 return 0;
3063
3064nla_put_failure:
3065 nla_nest_cancel(skb, nl_dest);
3066 return -EMSGSIZE;
3067}
3068
3069static int ip_vs_genl_dump_dest(struct sk_buff *skb, struct ip_vs_dest *dest,
3070 struct netlink_callback *cb)
3071{
3072 void *hdr;
3073
15e47304 3074 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
9a812198
JV		 3075 &ip_vs_genl_family, NLM_F_MULTI,
3076 IPVS_CMD_NEW_DEST);
3077 if (!hdr)
3078 return -EMSGSIZE;
3079
3080 if (ip_vs_genl_fill_dest(skb, dest) < 0)
3081 goto nla_put_failure;
3082
053c095a
JB		 3083 genlmsg_end(skb, hdr);
3084 return 0;
9a812198
JV		 3085
3086nla_put_failure:
3087 genlmsg_cancel(skb, hdr);
3088 return -EMSGSIZE;
3089}
3090
3091static int ip_vs_genl_dump_dests(struct sk_buff *skb,
3092 struct netlink_callback *cb)
3093{
3094 int idx = 0;
3095 int start = cb->args[0];
3096 struct ip_vs_service *svc;
3097 struct ip_vs_dest *dest;
3098 struct nlattr *attrs[IPVS_CMD_ATTR_MAX + 1];
a0840e2e 3099 struct net *net = skb_sknet(skb);
9a812198
JV		 3100
3101 mutex_lock(&__ip_vs_mutex);
3102
3103 /* Try to find the service for which to dump destinations */
3104 if (nlmsg_parse(cb->nlh, GENL_HDRLEN, attrs,
3105 IPVS_CMD_ATTR_MAX, ip_vs_cmd_policy))
3106 goto out_err;
3107
a0840e2e 3108
fc723250 3109 svc = ip_vs_genl_find_service(net, attrs[IPVS_CMD_ATTR_SERVICE]);
9a812198
JV		 3110 if (IS_ERR(svc) || svc == NULL)
3111 goto out_err;
3112
3113 /* Dump the destinations */
3114 list_for_each_entry(dest, &svc->destinations, n_list) {
3115 if (++idx <= start)
3116 continue;
3117 if (ip_vs_genl_dump_dest(skb, dest, cb) < 0) {
3118 idx--;
3119 goto nla_put_failure;
3120 }
3121 }
3122
3123nla_put_failure:
3124 cb->args[0] = idx;
9a812198
JV		 3125
3126out_err:
3127 mutex_unlock(&__ip_vs_mutex);
3128
3129 return skb->len;
3130}
3131
c860c6b1 3132static int ip_vs_genl_parse_dest(struct ip_vs_dest_user_kern *udest,
9a812198
JV		 3133 struct nlattr *nla, int full_entry)
3134{
3135 struct nlattr *attrs[IPVS_DEST_ATTR_MAX + 1];
3136 struct nlattr *nla_addr, *nla_port;
6cff339b 3137 struct nlattr *nla_addr_family;
9a812198
JV		 3138
3139 /* Parse mandatory identifying destination fields first */
3140 if (nla == NULL ||
3141 nla_parse_nested(attrs, IPVS_DEST_ATTR_MAX, nla, ip_vs_dest_policy))
3142 return -EINVAL;
3143
3144 nla_addr = attrs[IPVS_DEST_ATTR_ADDR];
3145 nla_port = attrs[IPVS_DEST_ATTR_PORT];
6cff339b 3146 nla_addr_family = attrs[IPVS_DEST_ATTR_ADDR_FAMILY];
9a812198
JV		 3147
3148 if (!(nla_addr && nla_port))
3149 return -EINVAL;
3150
258c8893
SH		 3151 memset(udest, 0, sizeof(*udest));
3152
9a812198 3153 nla_memcpy(&udest->addr, nla_addr, sizeof(udest->addr));
0a925864 3154 udest->port = nla_get_be16(nla_port);
9a812198 3155
6cff339b
AG		 3156 if (nla_addr_family)
3157 udest->af = nla_get_u16(nla_addr_family);
3158 else
3159 udest->af = 0;
3160
9a812198
JV		 3161 /* If a full entry was requested, check for the additional fields */
3162 if (full_entry) {
3163 struct nlattr *nla_fwd, *nla_weight, *nla_u_thresh,
3164 *nla_l_thresh;
3165
3166 nla_fwd = attrs[IPVS_DEST_ATTR_FWD_METHOD];
3167 nla_weight = attrs[IPVS_DEST_ATTR_WEIGHT];
3168 nla_u_thresh = attrs[IPVS_DEST_ATTR_U_THRESH];
3169 nla_l_thresh = attrs[IPVS_DEST_ATTR_L_THRESH];
3170
3171 if (!(nla_fwd && nla_weight && nla_u_thresh && nla_l_thresh))
3172 return -EINVAL;
3173
3174 udest->conn_flags = nla_get_u32(nla_fwd)
3175 & IP_VS_CONN_F_FWD_MASK;
3176 udest->weight = nla_get_u32(nla_weight);
3177 udest->u_threshold = nla_get_u32(nla_u_thresh);
3178 udest->l_threshold = nla_get_u32(nla_l_thresh);
3179 }
3180
3181 return 0;
3182}
3183
0a925864
JA		 3184static int ip_vs_genl_fill_daemon(struct sk_buff *skb, __u32 state,
3185 const char *mcast_ifn, __u32 syncid)
9a812198
JV		 3186{
3187 struct nlattr *nl_daemon;
3188
3189 nl_daemon = nla_nest_start(skb, IPVS_CMD_ATTR_DAEMON);
3190 if (!nl_daemon)
3191 return -EMSGSIZE;
3192
969e8e25
DM		 3193 if (nla_put_u32(skb, IPVS_DAEMON_ATTR_STATE, state) ||
3194 nla_put_string(skb, IPVS_DAEMON_ATTR_MCAST_IFN, mcast_ifn) ||
3195 nla_put_u32(skb, IPVS_DAEMON_ATTR_SYNC_ID, syncid))
3196 goto nla_put_failure;
9a812198
JV		 3197 nla_nest_end(skb, nl_daemon);
3198
3199 return 0;
3200
3201nla_put_failure:
3202 nla_nest_cancel(skb, nl_daemon);
3203 return -EMSGSIZE;
3204}
3205
0a925864
JA		 3206static int ip_vs_genl_dump_daemon(struct sk_buff *skb, __u32 state,
3207 const char *mcast_ifn, __u32 syncid,
9a812198
JV		 3208 struct netlink_callback *cb)
3209{
3210 void *hdr;
15e47304 3211 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
9a812198
JV		 3212 &ip_vs_genl_family, NLM_F_MULTI,
3213 IPVS_CMD_NEW_DAEMON);
3214 if (!hdr)
3215 return -EMSGSIZE;
3216
3217 if (ip_vs_genl_fill_daemon(skb, state, mcast_ifn, syncid))
3218 goto nla_put_failure;
3219
053c095a
JB		 3220 genlmsg_end(skb, hdr);
3221 return 0;
9a812198
JV		 3222
3223nla_put_failure:
3224 genlmsg_cancel(skb, hdr);
3225 return -EMSGSIZE;
3226}
3227
3228static int ip_vs_genl_dump_daemons(struct sk_buff *skb,
3229 struct netlink_callback *cb)
3230{
a09d1977 3231 struct net *net = skb_sknet(skb);
f131315f
HS		 3232 struct netns_ipvs *ipvs = net_ipvs(net);
3233
ae1d48b2 3234 mutex_lock(&ipvs->sync_mutex);
f131315f 3235 if ((ipvs->sync_state & IP_VS_STATE_MASTER) && !cb->args[0]) {
9a812198 3236 if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_MASTER,
f131315f
HS		 3237 ipvs->master_mcast_ifn,
3238 ipvs->master_syncid, cb) < 0)
9a812198
JV		 3239 goto nla_put_failure;
3240
3241 cb->args[0] = 1;
3242 }
3243
f131315f 3244 if ((ipvs->sync_state & IP_VS_STATE_BACKUP) && !cb->args[1]) {
9a812198 3245 if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_BACKUP,
f131315f
HS		 3246 ipvs->backup_mcast_ifn,
3247 ipvs->backup_syncid, cb) < 0)
9a812198
JV		 3248 goto nla_put_failure;
3249
3250 cb->args[1] = 1;
3251 }
3252
3253nla_put_failure:
ae1d48b2 3254 mutex_unlock(&ipvs->sync_mutex);
9a812198
JV		 3255
3256 return skb->len;
3257}
3258
f131315f 3259static int ip_vs_genl_new_daemon(struct net *net, struct nlattr **attrs)
9a812198
JV		 3260{
3261 if (!(attrs[IPVS_DAEMON_ATTR_STATE] &&
3262 attrs[IPVS_DAEMON_ATTR_MCAST_IFN] &&
3263 attrs[IPVS_DAEMON_ATTR_SYNC_ID]))
3264 return -EINVAL;
3265
391f503d
AG		 3266 /* The synchronization protocol is incompatible with mixed family
3267 * services
3268 */
3269 if (net_ipvs(net)->mixed_address_family_dests > 0)
3270 return -EINVAL;
3271
f131315f
HS		 3272 return start_sync_thread(net,
3273 nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]),
9a812198
JV		 3274 nla_data(attrs[IPVS_DAEMON_ATTR_MCAST_IFN]),
3275 nla_get_u32(attrs[IPVS_DAEMON_ATTR_SYNC_ID]));
3276}
3277
f131315f 3278static int ip_vs_genl_del_daemon(struct net *net, struct nlattr **attrs)
9a812198
JV		 3279{
3280 if (!attrs[IPVS_DAEMON_ATTR_STATE])
3281 return -EINVAL;
3282
f131315f
HS		 3283 return stop_sync_thread(net,
3284 nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]));
9a812198
JV		 3285}
3286
9330419d 3287static int ip_vs_genl_set_config(struct net *net, struct nlattr **attrs)
9a812198
JV		 3288{
3289 struct ip_vs_timeout_user t;
3290
9330419d 3291 __ip_vs_get_timeouts(net, &t);
9a812198
JV		 3292
3293 if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP])
3294 t.tcp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP]);
3295
3296 if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN])
3297 t.tcp_fin_timeout =
3298 nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN]);
3299
3300 if (attrs[IPVS_CMD_ATTR_TIMEOUT_UDP])
3301 t.udp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_UDP]);
3302
9330419d 3303 return ip_vs_set_timeout(net, &t);
9a812198
JV		 3304}
3305
ae1d48b2 3306static int ip_vs_genl_set_daemon(struct sk_buff *skb, struct genl_info *info)
9a812198 3307{
9a812198 3308 int ret = 0, cmd;
fc723250 3309 struct net *net;
a0840e2e 3310 struct netns_ipvs *ipvs;
9a812198 3311
fc723250 3312 net = skb_sknet(skb);
a0840e2e 3313 ipvs = net_ipvs(net);
9a812198
JV		 3314 cmd = info->genlhdr->cmd;
3315
ae1d48b2 3316 if (cmd == IPVS_CMD_NEW_DAEMON || cmd == IPVS_CMD_DEL_DAEMON) {
9a812198
JV		 3317 struct nlattr *daemon_attrs[IPVS_DAEMON_ATTR_MAX + 1];
3318
ae1d48b2 3319 mutex_lock(&ipvs->sync_mutex);
9a812198
JV		 3320 if (!info->attrs[IPVS_CMD_ATTR_DAEMON] ||
3321 nla_parse_nested(daemon_attrs, IPVS_DAEMON_ATTR_MAX,
3322 info->attrs[IPVS_CMD_ATTR_DAEMON],
3323 ip_vs_daemon_policy)) {
3324 ret = -EINVAL;
3325 goto out;
3326 }
3327
3328 if (cmd == IPVS_CMD_NEW_DAEMON)
f131315f 3329 ret = ip_vs_genl_new_daemon(net, daemon_attrs);
9a812198 3330 else
f131315f 3331 ret = ip_vs_genl_del_daemon(net, daemon_attrs);
ae1d48b2
HS		 3332out:
3333 mutex_unlock(&ipvs->sync_mutex);
3334 }
3335 return ret;
3336}
3337
3338static int ip_vs_genl_set_cmd(struct sk_buff *skb, struct genl_info *info)
3339{
3340 struct ip_vs_service *svc = NULL;
3341 struct ip_vs_service_user_kern usvc;
3342 struct ip_vs_dest_user_kern udest;
3343 int ret = 0, cmd;
3344 int need_full_svc = 0, need_full_dest = 0;
3345 struct net *net;
ae1d48b2
HS		 3346
3347 net = skb_sknet(skb);
ae1d48b2
HS		 3348 cmd = info->genlhdr->cmd;
3349
3350 mutex_lock(&__ip_vs_mutex);
3351
3352 if (cmd == IPVS_CMD_FLUSH) {
578bc3ef 3353 ret = ip_vs_flush(net, false);
ae1d48b2
HS		 3354 goto out;
3355 } else if (cmd == IPVS_CMD_SET_CONFIG) {
3356 ret = ip_vs_genl_set_config(net, info->attrs);
9a812198
JV		 3357 goto out;
3358 } else if (cmd == IPVS_CMD_ZERO &&
3359 !info->attrs[IPVS_CMD_ATTR_SERVICE]) {
fc723250 3360 ret = ip_vs_zero_all(net);
9a812198
JV		 3361 goto out;
3362 }
3363
3364 /* All following commands require a service argument, so check if we
3365 * received a valid one. We need a full service specification when
3366 * adding / editing a service. Only identifying members otherwise. */
3367 if (cmd == IPVS_CMD_NEW_SERVICE || cmd == IPVS_CMD_SET_SERVICE)
3368 need_full_svc = 1;
3369
fc723250 3370 ret = ip_vs_genl_parse_service(net, &usvc,
9a812198 3371 info->attrs[IPVS_CMD_ATTR_SERVICE],
26c15cfd 3372 need_full_svc, &svc);
9a812198
JV		 3373 if (ret)
3374 goto out;
3375
9a812198
JV		 3376 /* Unless we're adding a new service, the service must already exist */
3377 if ((cmd != IPVS_CMD_NEW_SERVICE) && (svc == NULL)) {
3378 ret = -ESRCH;
3379 goto out;
3380 }
3381
3382 /* Destination commands require a valid destination argument. For
3383 * adding / editing a destination, we need a full destination
3384 * specification. */
3385 if (cmd == IPVS_CMD_NEW_DEST || cmd == IPVS_CMD_SET_DEST ||
3386 cmd == IPVS_CMD_DEL_DEST) {
3387 if (cmd != IPVS_CMD_DEL_DEST)
3388 need_full_dest = 1;
3389
3390 ret = ip_vs_genl_parse_dest(&udest,
3391 info->attrs[IPVS_CMD_ATTR_DEST],
3392 need_full_dest);
3393 if (ret)
3394 goto out;
6cff339b
AG		 3395
3396 /* Old protocols did not allow the user to specify address
3397 * family, so we set it to zero instead. We also didn't
3398 * allow heterogeneous pools in the old code, so it's safe
3399 * to assume that this will have the same address family as
3400 * the service.
3401 */
3402 if (udest.af == 0)
3403 udest.af = svc->af;
bc18d37f
AG		 3404
3405 if (udest.af != svc->af) {
3406 /* The synchronization protocol is incompatible
3407 * with mixed family services
3408 */
3409 if (net_ipvs(net)->sync_state) {
3410 ret = -EINVAL;
3411 goto out;
3412 }
3413
3414 /* Which connection types do we support? */
3415 switch (udest.conn_flags) {
3416 case IP_VS_CONN_F_TUNNEL:
3417 /* We are able to forward this */
3418 break;
3419 default:
3420 ret = -EINVAL;
3421 goto out;
3422 }
3423 }
9a812198
JV		 3424 }
3425
3426 switch (cmd) {
3427 case IPVS_CMD_NEW_SERVICE:
3428 if (svc == NULL)
fc723250 3429 ret = ip_vs_add_service(net, &usvc, &svc);
9a812198
JV		 3430 else
3431 ret = -EEXIST;
3432 break;
3433 case IPVS_CMD_SET_SERVICE:
3434 ret = ip_vs_edit_service(svc, &usvc);
3435 break;
3436 case IPVS_CMD_DEL_SERVICE:
3437 ret = ip_vs_del_service(svc);
26c15cfd 3438 /* do not use svc, it can be freed */
9a812198
JV		 3439 break;
3440 case IPVS_CMD_NEW_DEST:
3441 ret = ip_vs_add_dest(svc, &udest);
3442 break;
3443 case IPVS_CMD_SET_DEST:
3444 ret = ip_vs_edit_dest(svc, &udest);
3445 break;
3446 case IPVS_CMD_DEL_DEST:
3447 ret = ip_vs_del_dest(svc, &udest);
3448 break;
3449 case IPVS_CMD_ZERO:
3450 ret = ip_vs_zero_service(svc);
3451 break;
3452 default:
3453 ret = -EINVAL;
3454 }
3455
3456out:
9a812198
JV		 3457 mutex_unlock(&__ip_vs_mutex);
3458
3459 return ret;
3460}
3461
3462static int ip_vs_genl_get_cmd(struct sk_buff *skb, struct genl_info *info)
3463{
3464 struct sk_buff *msg;
3465 void *reply;
3466 int ret, cmd, reply_cmd;
fc723250 3467 struct net *net;
9a812198 3468
fc723250 3469 net = skb_sknet(skb);
9a812198
JV		 3470 cmd = info->genlhdr->cmd;
3471
3472 if (cmd == IPVS_CMD_GET_SERVICE)
3473 reply_cmd = IPVS_CMD_NEW_SERVICE;
3474 else if (cmd == IPVS_CMD_GET_INFO)
3475 reply_cmd = IPVS_CMD_SET_INFO;
3476 else if (cmd == IPVS_CMD_GET_CONFIG)
3477 reply_cmd = IPVS_CMD_SET_CONFIG;
3478 else {
1e3e238e 3479 pr_err("unknown Generic Netlink command\n");
9a812198
JV		 3480 return -EINVAL;
3481 }
3482
3483 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3484 if (!msg)
3485 return -ENOMEM;
3486
3487 mutex_lock(&__ip_vs_mutex);
3488
3489 reply = genlmsg_put_reply(msg, info, &ip_vs_genl_family, 0, reply_cmd);
3490 if (reply == NULL)
3491 goto nla_put_failure;
3492
3493 switch (cmd) {
3494 case IPVS_CMD_GET_SERVICE:
3495 {
3496 struct ip_vs_service *svc;
3497
fc723250
HS		 3498 svc = ip_vs_genl_find_service(net,
3499 info->attrs[IPVS_CMD_ATTR_SERVICE]);
9a812198
JV		 3500 if (IS_ERR(svc)) {
3501 ret = PTR_ERR(svc);
3502 goto out_err;
3503 } else if (svc) {
3504 ret = ip_vs_genl_fill_service(msg, svc);
9a812198
JV		 3505 if (ret)
3506 goto nla_put_failure;
3507 } else {
3508 ret = -ESRCH;
3509 goto out_err;
3510 }
3511
3512 break;
3513 }
3514
3515 case IPVS_CMD_GET_CONFIG:
3516 {
3517 struct ip_vs_timeout_user t;
3518
9330419d 3519 __ip_vs_get_timeouts(net, &t);
9a812198 3520#ifdef CONFIG_IP_VS_PROTO_TCP
969e8e25
DM		 3521 if (nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP,
3522 t.tcp_timeout) ||
3523 nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP_FIN,
3524 t.tcp_fin_timeout))
3525 goto nla_put_failure;
9a812198
JV		 3526#endif
3527#ifdef CONFIG_IP_VS_PROTO_UDP
969e8e25
DM		 3528 if (nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_UDP, t.udp_timeout))
3529 goto nla_put_failure;
9a812198
JV		 3530#endif
3531
3532 break;
3533 }
3534
3535 case IPVS_CMD_GET_INFO:
969e8e25
DM		 3536 if (nla_put_u32(msg, IPVS_INFO_ATTR_VERSION,
3537 IP_VS_VERSION_CODE) ||
3538 nla_put_u32(msg, IPVS_INFO_ATTR_CONN_TAB_SIZE,
3539 ip_vs_conn_tab_size))
3540 goto nla_put_failure;
9a812198
JV		 3541 break;
3542 }
3543
3544 genlmsg_end(msg, reply);
134e6375 3545 ret = genlmsg_reply(msg, info);
9a812198
JV		 3546 goto out;
3547
3548nla_put_failure:
1e3e238e 3549 pr_err("not enough space in Netlink message\n");
9a812198
JV		 3550 ret = -EMSGSIZE;
3551
3552out_err:
3553 nlmsg_free(msg);
3554out:
3555 mutex_unlock(&__ip_vs_mutex);
3556
3557 return ret;
3558}
3559
3560
c61b0c13 3561static const struct genl_ops ip_vs_genl_ops[] = {
9a812198
JV		 3562 {
3563 .cmd = IPVS_CMD_NEW_SERVICE,
3564 .flags = GENL_ADMIN_PERM,
3565 .policy = ip_vs_cmd_policy,
3566 .doit = ip_vs_genl_set_cmd,
3567 },
3568 {
3569 .cmd = IPVS_CMD_SET_SERVICE,
3570 .flags = GENL_ADMIN_PERM,
3571 .policy = ip_vs_cmd_policy,
3572 .doit = ip_vs_genl_set_cmd,
3573 },
3574 {
3575 .cmd = IPVS_CMD_DEL_SERVICE,
3576 .flags = GENL_ADMIN_PERM,
3577 .policy = ip_vs_cmd_policy,
3578 .doit = ip_vs_genl_set_cmd,
3579 },
3580 {
3581 .cmd = IPVS_CMD_GET_SERVICE,
3582 .flags = GENL_ADMIN_PERM,
3583 .doit = ip_vs_genl_get_cmd,
3584 .dumpit = ip_vs_genl_dump_services,
3585 .policy = ip_vs_cmd_policy,
3586 },
3587 {
3588 .cmd = IPVS_CMD_NEW_DEST,
3589 .flags = GENL_ADMIN_PERM,
3590 .policy = ip_vs_cmd_policy,
3591 .doit = ip_vs_genl_set_cmd,
3592 },
3593 {
3594 .cmd = IPVS_CMD_SET_DEST,
3595 .flags = GENL_ADMIN_PERM,
3596 .policy = ip_vs_cmd_policy,
3597 .doit = ip_vs_genl_set_cmd,
3598 },
3599 {
3600 .cmd = IPVS_CMD_DEL_DEST,
3601 .flags = GENL_ADMIN_PERM,
3602 .policy = ip_vs_cmd_policy,
3603 .doit = ip_vs_genl_set_cmd,
3604 },
3605 {
3606 .cmd = IPVS_CMD_GET_DEST,
3607 .flags = GENL_ADMIN_PERM,
3608 .policy = ip_vs_cmd_policy,
3609 .dumpit = ip_vs_genl_dump_dests,
3610 },
3611 {
3612 .cmd = IPVS_CMD_NEW_DAEMON,
3613 .flags = GENL_ADMIN_PERM,
3614 .policy = ip_vs_cmd_policy,
ae1d48b2 3615 .doit = ip_vs_genl_set_daemon,
9a812198
JV		 3616 },
3617 {
3618 .cmd = IPVS_CMD_DEL_DAEMON,
3619 .flags = GENL_ADMIN_PERM,
3620 .policy = ip_vs_cmd_policy,
ae1d48b2 3621 .doit = ip_vs_genl_set_daemon,
9a812198
JV		 3622 },
3623 {
3624 .cmd = IPVS_CMD_GET_DAEMON,
3625 .flags = GENL_ADMIN_PERM,
3626 .dumpit = ip_vs_genl_dump_daemons,
3627 },
3628 {
3629 .cmd = IPVS_CMD_SET_CONFIG,
3630 .flags = GENL_ADMIN_PERM,
3631 .policy = ip_vs_cmd_policy,
3632 .doit = ip_vs_genl_set_cmd,
3633 },
3634 {
3635 .cmd = IPVS_CMD_GET_CONFIG,
3636 .flags = GENL_ADMIN_PERM,
3637 .doit = ip_vs_genl_get_cmd,
3638 },
3639 {
3640 .cmd = IPVS_CMD_GET_INFO,
3641 .flags = GENL_ADMIN_PERM,
3642 .doit = ip_vs_genl_get_cmd,
3643 },
3644 {
3645 .cmd = IPVS_CMD_ZERO,
3646 .flags = GENL_ADMIN_PERM,
3647 .policy = ip_vs_cmd_policy,
3648 .doit = ip_vs_genl_set_cmd,
3649 },
3650 {
3651 .cmd = IPVS_CMD_FLUSH,
3652 .flags = GENL_ADMIN_PERM,
3653 .doit = ip_vs_genl_set_cmd,
3654 },
3655};
3656
3657static int __init ip_vs_genl_register(void)
3658{
8f698d54 3659 return genl_register_family_with_ops(&ip_vs_genl_family,
c53ed742 3660 ip_vs_genl_ops);
9a812198
JV		 3661}
3662
3663static void ip_vs_genl_unregister(void)
3664{
3665 genl_unregister_family(&ip_vs_genl_family);
3666}
3667
3668/* End of Generic Netlink interface definitions */
3669
61b1ab45
HS		 3670/*
3671 * per netns intit/exit func.
3672 */
14e40546 3673#ifdef CONFIG_SYSCTL
2b2d2808 3674static int __net_init ip_vs_control_net_init_sysctl(struct net *net)
61b1ab45 3675{
fc723250
HS		 3676 int idx;
3677 struct netns_ipvs *ipvs = net_ipvs(net);
a0840e2e 3678 struct ctl_table *tbl;
fc723250 3679
a0840e2e
HS		 3680 atomic_set(&ipvs->dropentry, 0);
3681 spin_lock_init(&ipvs->dropentry_lock);
3682 spin_lock_init(&ipvs->droppacket_lock);
3683 spin_lock_init(&ipvs->securetcp_lock);
a0840e2e
HS		 3684
3685 if (!net_eq(net, &init_net)) {
3686 tbl = kmemdup(vs_vars, sizeof(vs_vars), GFP_KERNEL);
3687 if (tbl == NULL)
14e40546 3688 return -ENOMEM;
464dc801
EB		 3689
3690 /* Don't export sysctls to unprivileged users */
3691 if (net->user_ns != &init_user_ns)
3692 tbl[0].procname = NULL;
a0840e2e
HS		 3693 } else
3694 tbl = vs_vars;
3695 /* Initialize sysctl defaults */
3696 idx = 0;
3697 ipvs->sysctl_amemthresh = 1024;
3698 tbl[idx++].data = &ipvs->sysctl_amemthresh;
3699 ipvs->sysctl_am_droprate = 10;
3700 tbl[idx++].data = &ipvs->sysctl_am_droprate;
3701 tbl[idx++].data = &ipvs->sysctl_drop_entry;
3702 tbl[idx++].data = &ipvs->sysctl_drop_packet;
3703#ifdef CONFIG_IP_VS_NFCT
3704 tbl[idx++].data = &ipvs->sysctl_conntrack;
3705#endif
3706 tbl[idx++].data = &ipvs->sysctl_secure_tcp;
3707 ipvs->sysctl_snat_reroute = 1;
3708 tbl[idx++].data = &ipvs->sysctl_snat_reroute;
3709 ipvs->sysctl_sync_ver = 1;
3710 tbl[idx++].data = &ipvs->sysctl_sync_ver;
f73181c8
PNA		 3711 ipvs->sysctl_sync_ports = 1;
3712 tbl[idx++].data = &ipvs->sysctl_sync_ports;
4d0c875d 3713 tbl[idx++].data = &ipvs->sysctl_sync_persist_mode;
1c003b15
PNA		 3714 ipvs->sysctl_sync_qlen_max = nr_free_buffer_pages() / 32;
3715 tbl[idx++].data = &ipvs->sysctl_sync_qlen_max;
3716 ipvs->sysctl_sync_sock_size = 0;
3717 tbl[idx++].data = &ipvs->sysctl_sync_sock_size;
a0840e2e
HS		 3718 tbl[idx++].data = &ipvs->sysctl_cache_bypass;
3719 tbl[idx++].data = &ipvs->sysctl_expire_nodest_conn;
c6c96c18
AF		 3720 tbl[idx++].data = &ipvs->sysctl_sloppy_tcp;
3721 tbl[idx++].data = &ipvs->sysctl_sloppy_sctp;
a0840e2e 3722 tbl[idx++].data = &ipvs->sysctl_expire_quiescent_template;
59e0350e
SH		 3723 ipvs->sysctl_sync_threshold[0] = DEFAULT_SYNC_THRESHOLD;
3724 ipvs->sysctl_sync_threshold[1] = DEFAULT_SYNC_PERIOD;
a0840e2e
HS		 3725 tbl[idx].data = &ipvs->sysctl_sync_threshold;
3726 tbl[idx++].maxlen = sizeof(ipvs->sysctl_sync_threshold);
749c42b6
JA		 3727 ipvs->sysctl_sync_refresh_period = DEFAULT_SYNC_REFRESH_PERIOD;
3728 tbl[idx++].data = &ipvs->sysctl_sync_refresh_period;
3729 ipvs->sysctl_sync_retries = clamp_t(int, DEFAULT_SYNC_RETRIES, 0, 3);
3730 tbl[idx++].data = &ipvs->sysctl_sync_retries;
a0840e2e 3731 tbl[idx++].data = &ipvs->sysctl_nat_icmp_send;
3654e611
JA		 3732 ipvs->sysctl_pmtu_disc = 1;
3733 tbl[idx++].data = &ipvs->sysctl_pmtu_disc;
0c12582f 3734 tbl[idx++].data = &ipvs->sysctl_backup_only;
a0840e2e
HS		 3735
3736
ec8f23ce 3737 ipvs->sysctl_hdr = register_net_sysctl(net, "net/ipv4/vs", tbl);
0443929f
SH		 3738 if (ipvs->sysctl_hdr == NULL) {
3739 if (!net_eq(net, &init_net))
3740 kfree(tbl);
14e40546 3741 return -ENOMEM;
0443929f 3742 }
6ef757f9 3743 ip_vs_start_estimator(net, &ipvs->tot_stats);
a0840e2e 3744 ipvs->sysctl_tbl = tbl;
f6340ee0
HS		 3745 /* Schedule defense work */
3746 INIT_DELAYED_WORK(&ipvs->defense_work, defense_work_handler);
3747 schedule_delayed_work(&ipvs->defense_work, DEFENSE_TIMER_PERIOD);
61b1ab45 3748
61b1ab45 3749 return 0;
61b1ab45
HS		 3750}
3751
2b2d2808 3752static void __net_exit ip_vs_control_net_cleanup_sysctl(struct net *net)
61b1ab45 3753{
b17fc996
HS		 3754 struct netns_ipvs *ipvs = net_ipvs(net);
3755
f2431e6e
HS		 3756 cancel_delayed_work_sync(&ipvs->defense_work);
3757 cancel_work_sync(&ipvs->defense_work.work);
a0840e2e 3758 unregister_net_sysctl_table(ipvs->sysctl_hdr);
9802d21e 3759 ip_vs_stop_estimator(net, &ipvs->tot_stats);
14e40546
SH		 3760}
3761
3762#else
3763
2b2d2808
CG		 3764static int __net_init ip_vs_control_net_init_sysctl(struct net *net) { return 0; }
3765static void __net_exit ip_vs_control_net_cleanup_sysctl(struct net *net) { }
14e40546 3766
0443929f 3767#endif
14e40546 3768
7a4f0761
HS		 3769static struct notifier_block ip_vs_dst_notifier = {
3770 .notifier_call = ip_vs_dst_event,
3771};
3772
503cf15a 3773int __net_init ip_vs_control_net_init(struct net *net)
14e40546 3774{
827da44c 3775 int i, idx;
14e40546
SH		 3776 struct netns_ipvs *ipvs = net_ipvs(net);
3777
14e40546
SH		 3778 /* Initialize rs_table */
3779 for (idx = 0; idx < IP_VS_RTAB_SIZE; idx++)
276472ea 3780 INIT_HLIST_HEAD(&ipvs->rs_table[idx]);
14e40546
SH		 3781
3782 INIT_LIST_HEAD(&ipvs->dest_trash);
578bc3ef
JA		 3783 spin_lock_init(&ipvs->dest_trash_lock);
3784 setup_timer(&ipvs->dest_trash_timer, ip_vs_dest_trash_expire,
3785 (unsigned long) net);
14e40546
SH		 3786 atomic_set(&ipvs->ftpsvc_counter, 0);
3787 atomic_set(&ipvs->nullsvc_counter, 0);
3788
3789 /* procfs stats */
3790 ipvs->tot_stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
0a9ee813 3791 if (!ipvs->tot_stats.cpustats)
14e40546 3792 return -ENOMEM;
0a9ee813 3793
827da44c
JS		 3794 for_each_possible_cpu(i) {
3795 struct ip_vs_cpu_stats *ipvs_tot_stats;
3796 ipvs_tot_stats = per_cpu_ptr(ipvs->tot_stats.cpustats, i);
3797 u64_stats_init(&ipvs_tot_stats->syncp);
3798 }
3799
14e40546
SH		 3800 spin_lock_init(&ipvs->tot_stats.lock);
3801
d4beaa66
G		 3802 proc_create("ip_vs", 0, net->proc_net, &ip_vs_info_fops);
3803 proc_create("ip_vs_stats", 0, net->proc_net, &ip_vs_stats_fops);
3804 proc_create("ip_vs_stats_percpu", 0, net->proc_net,
3805 &ip_vs_stats_percpu_fops);
14e40546 3806
503cf15a 3807 if (ip_vs_control_net_init_sysctl(net))
14e40546
SH		 3808 goto err;
3809
3810 return 0;
3811
3812err:
2a0751af 3813 free_percpu(ipvs->tot_stats.cpustats);
61b1ab45
HS		 3814 return -ENOMEM;
3815}
3816
503cf15a 3817void __net_exit ip_vs_control_net_cleanup(struct net *net)
61b1ab45 3818{
b17fc996
HS		 3819 struct netns_ipvs *ipvs = net_ipvs(net);
3820
f2431e6e 3821 ip_vs_trash_cleanup(net);
503cf15a 3822 ip_vs_control_net_cleanup_sysctl(net);
ece31ffd
G		 3823 remove_proc_entry("ip_vs_stats_percpu", net->proc_net);
3824 remove_proc_entry("ip_vs_stats", net->proc_net);
3825 remove_proc_entry("ip_vs", net->proc_net);
2a0751af 3826 free_percpu(ipvs->tot_stats.cpustats);
61b1ab45
HS		 3827}
3828
8537de8a 3829int __init ip_vs_register_nl_ioctl(void)
1da177e4 3830{
fc723250 3831 int ret;
1da177e4 3832
1da177e4
LT		 3833 ret = nf_register_sockopt(&ip_vs_sockopts);
3834 if (ret) {
1e3e238e 3835 pr_err("cannot register sockopt.\n");
7a4f0761 3836 goto err_sock;
1da177e4
LT		 3837 }
3838
9a812198
JV		 3839 ret = ip_vs_genl_register();
3840 if (ret) {
1e3e238e 3841 pr_err("cannot register Generic Netlink interface.\n");
7a4f0761 3842 goto err_genl;
9a812198 3843 }
1da177e4 3844 return 0;
fc723250 3845
7a4f0761
HS		 3846err_genl:
3847 nf_unregister_sockopt(&ip_vs_sockopts);
3848err_sock:
fc723250 3849 return ret;
1da177e4
LT		 3850}
3851
8537de8a
HS		 3852void ip_vs_unregister_nl_ioctl(void)
3853{
3854 ip_vs_genl_unregister();
3855 nf_unregister_sockopt(&ip_vs_sockopts);
3856}
3857
3858int __init ip_vs_control_init(void)
3859{
3860 int idx;
3861 int ret;
3862
3863 EnterFunction(2);
3864
276472ea 3865 /* Initialize svc_table, ip_vs_svc_fwm_table */
8537de8a 3866 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38
JA		 3867 INIT_HLIST_HEAD(&ip_vs_svc_table[idx]);
3868 INIT_HLIST_HEAD(&ip_vs_svc_fwm_table[idx]);
8537de8a
HS		 3869 }
3870
3871 smp_wmb(); /* Do we really need it now ? */
3872
3873 ret = register_netdevice_notifier(&ip_vs_dst_notifier);
3874 if (ret < 0)
3875 return ret;
3876
3877 LeaveFunction(2);
3878 return 0;
3879}
3880
1da177e4
LT		 3881
3882void ip_vs_control_cleanup(void)
3883{
3884 EnterFunction(2);
7676e345 3885 unregister_netdevice_notifier(&ip_vs_dst_notifier);
1da177e4
LT		 3886 LeaveFunction(2);
3887}
Linux 6.x block layer and io_uring tree(s)