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Merge remote-tracking branch 'ipvs-next/master'
[deliverable/linux.git] / net / netfilter / ipvs / ip_vs_ctl.c
CommitLineData
1da177e4
LT		 1/*
2 * IPVS An implementation of the IP virtual server support for the
3 * LINUX operating system. IPVS is now implemented as a module
4 * over the NetFilter framework. IPVS can be used to build a
5 * high-performance and highly available server based on a
6 * cluster of servers.
7 *
1da177e4
LT		 8 * Authors: Wensong Zhang <wensong@linuxvirtualserver.org>
9 * Peter Kese <peter.kese@ijs.si>
10 * Julian Anastasov <ja@ssi.bg>
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version
15 * 2 of the License, or (at your option) any later version.
16 *
17 * Changes:
18 *
19 */
20
9aada7ac
HE		 21#define KMSG_COMPONENT "IPVS"
22#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
23
1da177e4
LT		 24#include <linux/module.h>
25#include <linux/init.h>
26#include <linux/types.h>
4fc268d2 27#include <linux/capability.h>
1da177e4
LT		 28#include <linux/fs.h>
29#include <linux/sysctl.h>
30#include <linux/proc_fs.h>
31#include <linux/workqueue.h>
32#include <linux/swap.h>
1da177e4 33#include <linux/seq_file.h>
5a0e3ad6 34#include <linux/slab.h>
1da177e4
LT		 35
36#include <linux/netfilter.h>
37#include <linux/netfilter_ipv4.h>
14cc3e2b 38#include <linux/mutex.h>
1da177e4 39
457c4cbc 40#include <net/net_namespace.h>
9330419d 41#include <linux/nsproxy.h>
1da177e4 42#include <net/ip.h>
09571c7a
VB		 43#ifdef CONFIG_IP_VS_IPV6
44#include <net/ipv6.h>
45#include <net/ip6_route.h>
46#endif
14c85021 47#include <net/route.h>
1da177e4 48#include <net/sock.h>
9a812198 49#include <net/genetlink.h>
1da177e4
LT		 50
51#include <asm/uaccess.h>
52
53#include <net/ip_vs.h>
54
55/* semaphore for IPVS sockopts. And, [gs]etsockopt may sleep. */
14cc3e2b 56static DEFINE_MUTEX(__ip_vs_mutex);
1da177e4 57
1da177e4 58/* sysctl variables */
1da177e4
LT		 59
60#ifdef CONFIG_IP_VS_DEBUG
61static int sysctl_ip_vs_debug_level = 0;
62
63int ip_vs_get_debug_level(void)
64{
65 return sysctl_ip_vs_debug_level;
66}
67#endif
68
7a4f0761
HS		 69
70/* Protos */
578bc3ef 71static void __ip_vs_del_service(struct ip_vs_service *svc, bool cleanup);
7a4f0761
HS		 72
73
09571c7a
VB		 74#ifdef CONFIG_IP_VS_IPV6
75/* Taken from rt6_fill_node() in net/ipv6/route.c, is there a better way? */
c24584c0
ED		 76static bool __ip_vs_addr_is_local_v6(struct net *net,
77 const struct in6_addr *addr)
09571c7a 78{
4c9483b2
DM		 79 struct flowi6 fl6 = {
80 .daddr = *addr,
09571c7a 81 };
c24584c0
ED		 82 struct dst_entry *dst = ip6_route_output(net, NULL, &fl6);
83 bool is_local;
09571c7a 84
c24584c0 85 is_local = !dst->error && dst->dev && (dst->dev->flags & IFF_LOOPBACK);
09571c7a 86
c24584c0
ED		 87 dst_release(dst);
88 return is_local;
09571c7a
VB		 89}
90#endif
14e40546
SH		 91
92#ifdef CONFIG_SYSCTL
1da177e4 93/*
af9debd4
JA		 94 * update_defense_level is called from keventd and from sysctl,
95 * so it needs to protect itself from softirqs
1da177e4 96 */
9330419d 97static void update_defense_level(struct netns_ipvs *ipvs)
1da177e4
LT		 98{
99 struct sysinfo i;
100 static int old_secure_tcp = 0;
101 int availmem;
102 int nomem;
103 int to_change = -1;
104
105 /* we only count free and buffered memory (in pages) */
106 si_meminfo(&i);
107 availmem = i.freeram + i.bufferram;
108 /* however in linux 2.5 the i.bufferram is total page cache size,
109 we need adjust it */
110 /* si_swapinfo(&i); */
111 /* availmem = availmem - (i.totalswap - i.freeswap); */
112
a0840e2e 113 nomem = (availmem < ipvs->sysctl_amemthresh);
1da177e4 114
af9debd4
JA		 115 local_bh_disable();
116
1da177e4 117 /* drop_entry */
a0840e2e
HS		 118 spin_lock(&ipvs->dropentry_lock);
119 switch (ipvs->sysctl_drop_entry) {
1da177e4 120 case 0:
a0840e2e 121 atomic_set(&ipvs->dropentry, 0);
1da177e4
LT		 122 break;
123 case 1:
124 if (nomem) {
a0840e2e
HS		 125 atomic_set(&ipvs->dropentry, 1);
126 ipvs->sysctl_drop_entry = 2;
1da177e4 127 } else {
a0840e2e 128 atomic_set(&ipvs->dropentry, 0);
1da177e4
LT		 129 }
130 break;
131 case 2:
132 if (nomem) {
a0840e2e 133 atomic_set(&ipvs->dropentry, 1);
1da177e4 134 } else {
a0840e2e
HS		 135 atomic_set(&ipvs->dropentry, 0);
136 ipvs->sysctl_drop_entry = 1;
1da177e4
LT		 137 };
138 break;
139 case 3:
a0840e2e 140 atomic_set(&ipvs->dropentry, 1);
1da177e4
LT		 141 break;
142 }
a0840e2e 143 spin_unlock(&ipvs->dropentry_lock);
1da177e4
LT		 144
145 /* drop_packet */
a0840e2e
HS		 146 spin_lock(&ipvs->droppacket_lock);
147 switch (ipvs->sysctl_drop_packet) {
1da177e4 148 case 0:
a0840e2e 149 ipvs->drop_rate = 0;
1da177e4
LT		 150 break;
151 case 1:
152 if (nomem) {
a0840e2e
HS		 153 ipvs->drop_rate = ipvs->drop_counter
154 = ipvs->sysctl_amemthresh /
155 (ipvs->sysctl_amemthresh-availmem);
156 ipvs->sysctl_drop_packet = 2;
1da177e4 157 } else {
a0840e2e 158 ipvs->drop_rate = 0;
1da177e4
LT		 159 }
160 break;
161 case 2:
162 if (nomem) {
a0840e2e
HS		 163 ipvs->drop_rate = ipvs->drop_counter
164 = ipvs->sysctl_amemthresh /
165 (ipvs->sysctl_amemthresh-availmem);
1da177e4 166 } else {
a0840e2e
HS		 167 ipvs->drop_rate = 0;
168 ipvs->sysctl_drop_packet = 1;
1da177e4
LT		 169 }
170 break;
171 case 3:
a0840e2e 172 ipvs->drop_rate = ipvs->sysctl_am_droprate;
1da177e4
LT		 173 break;
174 }
a0840e2e 175 spin_unlock(&ipvs->droppacket_lock);
1da177e4
LT		 176
177 /* secure_tcp */
a0840e2e
HS		 178 spin_lock(&ipvs->securetcp_lock);
179 switch (ipvs->sysctl_secure_tcp) {
1da177e4
LT		 180 case 0:
181 if (old_secure_tcp >= 2)
182 to_change = 0;
183 break;
184 case 1:
185 if (nomem) {
186 if (old_secure_tcp < 2)
187 to_change = 1;
a0840e2e 188 ipvs->sysctl_secure_tcp = 2;
1da177e4
LT		 189 } else {
190 if (old_secure_tcp >= 2)
191 to_change = 0;
192 }
193 break;
194 case 2:
195 if (nomem) {
196 if (old_secure_tcp < 2)
197 to_change = 1;
198 } else {
199 if (old_secure_tcp >= 2)
200 to_change = 0;
a0840e2e 201 ipvs->sysctl_secure_tcp = 1;
1da177e4
LT		 202 }
203 break;
204 case 3:
205 if (old_secure_tcp < 2)
206 to_change = 1;
207 break;
208 }
a0840e2e 209 old_secure_tcp = ipvs->sysctl_secure_tcp;
1da177e4 210 if (to_change >= 0)
9330419d 211 ip_vs_protocol_timeout_change(ipvs,
a0840e2e
HS		 212 ipvs->sysctl_secure_tcp > 1);
213 spin_unlock(&ipvs->securetcp_lock);
af9debd4
JA		 214
215 local_bh_enable();
1da177e4
LT		 216}
217
218
219/*
220 * Timer for checking the defense
221 */
222#define DEFENSE_TIMER_PERIOD 1*HZ
1da177e4 223
c4028958 224static void defense_work_handler(struct work_struct *work)
1da177e4 225{
f6340ee0
HS		 226 struct netns_ipvs *ipvs =
227 container_of(work, struct netns_ipvs, defense_work.work);
9330419d
HS		 228
229 update_defense_level(ipvs);
a0840e2e 230 if (atomic_read(&ipvs->dropentry))
423b5595 231 ip_vs_random_dropentry(ipvs);
f6340ee0 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 265static inline unsigned int
ba61f390 266ip_vs_svc_hashkey(struct netns_ipvs *ipvs, 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 278 ahash = ntohl(addr_fold);
ba61f390 279 ahash ^= ((size_t) ipvs >> 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 */
f6510b24 288static inline unsigned int ip_vs_svc_fwm_hashkey(struct netns_ipvs *ipvs, __u32 fwmark)
1da177e4 289{
f6510b24 290 return (((size_t)ipvs>>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 */
ba61f390 312 hash = ip_vs_svc_hashkey(svc->ipvs, svc->af, svc->protocol,
fc723250 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 */
f6510b24 319 hash = ip_vs_svc_fwm_hashkey(svc->ipvs, 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 *
bb2e2a8c 360__ip_vs_service_find(struct netns_ipvs *ipvs, int af, __u16 protocol,
fc723250 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 */
ba61f390 367 hash = ip_vs_svc_hashkey(ipvs, 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 373 && (svc->protocol == protocol)
3109d2f2 374 && (svc->ipvs == ipvs)) {
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 *
1ed8b947 388__ip_vs_svc_fwm_find(struct netns_ipvs *ipvs, 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 */
f6510b24 394 hash = ip_vs_svc_fwm_hashkey(ipvs, fwmark);
1da177e4 395
ceec4c38 396 hlist_for_each_entry_rcu(svc, &ip_vs_svc_fwm_table[hash], f_list) {
fc723250 397 if (svc->fwmark == fwmark && svc->af == af
3109d2f2 398 && (svc->ipvs == ipvs)) {
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 *
0a4fd6ce 409ip_vs_service_find(struct netns_ipvs *ipvs, int af, __u32 fwmark, __u16 protocol,
ceec4c38 410 const union nf_inet_addr *vaddr, __be16 vport)
1da177e4
LT		 411{
412 struct ip_vs_service *svc;
3c2e0505 413
1da177e4
LT		 414 /*
415 * Check the table hashed by fwmark first
416 */
097fc76a 417 if (fwmark) {
1ed8b947 418 svc = __ip_vs_svc_fwm_find(ipvs, af, fwmark);
097fc76a
JA		 419 if (svc)
420 goto out;
421 }
1da177e4
LT		 422
423 /*
424 * Check the table hashed by <protocol,addr,port>
425 * for "full" addressed entries
426 */
bb2e2a8c 427 svc = __ip_vs_service_find(ipvs, af, protocol, vaddr, vport);
1da177e4
LT		 428
429 if (svc == NULL
430 && protocol == IPPROTO_TCP
763f8d0e 431 && atomic_read(&ipvs->ftpsvc_counter)
1da177e4
LT		 432 && (vport == FTPDATA || ntohs(vport) >= PROT_SOCK)) {
433 /*
434 * Check if ftp service entry exists, the packet
435 * might belong to FTP data connections.
436 */
bb2e2a8c 437 svc = __ip_vs_service_find(ipvs, af, protocol, vaddr, FTPPORT);
1da177e4
LT		 438 }
439
440 if (svc == NULL
763f8d0e 441 && atomic_read(&ipvs->nullsvc_counter)) {
1da177e4
LT		 442 /*
443 * Check if the catch-all port (port zero) exists
444 */
bb2e2a8c 445 svc = __ip_vs_service_find(ipvs, af, protocol, vaddr, 0);
1da177e4
LT		 446 }
447
448 out:
3c2e0505
JV		 449 IP_VS_DBG_BUF(9, "lookup service: fwm %u %s %s:%u %s\n",
450 fwmark, ip_vs_proto_name(protocol),
451 IP_VS_DBG_ADDR(af, vaddr), ntohs(vport),
452 svc ? "hit" : "not hit");
1da177e4
LT		 453
454 return svc;
455}
456
457
458static inline void
459__ip_vs_bind_svc(struct ip_vs_dest *dest, struct ip_vs_service *svc)
460{
461 atomic_inc(&svc->refcnt);
bcbde4c0 462 rcu_assign_pointer(dest->svc, svc);
1da177e4
LT		 463}
464
ceec4c38
JA		 465static void ip_vs_service_free(struct ip_vs_service *svc)
466{
982f4051 467 free_percpu(svc->stats.cpustats);
ceec4c38
JA		 468 kfree(svc);
469}
470
bcbde4c0 471static void ip_vs_service_rcu_free(struct rcu_head *head)
1da177e4 472{
bcbde4c0
JA		 473 struct ip_vs_service *svc;
474
475 svc = container_of(head, struct ip_vs_service, rcu_head);
476 ip_vs_service_free(svc);
477}
1da177e4 478
bcbde4c0
JA		 479static void __ip_vs_svc_put(struct ip_vs_service *svc, bool do_delay)
480{
26c15cfd 481 if (atomic_dec_and_test(&svc->refcnt)) {
ceec4c38 482 IP_VS_DBG_BUF(3, "Removing service %u/%s:%u\n",
26c15cfd
JA		 483 svc->fwmark,
484 IP_VS_DBG_ADDR(svc->af, &svc->addr),
ceec4c38 485 ntohs(svc->port));
bcbde4c0
JA		 486 if (do_delay)
487 call_rcu(&svc->rcu_head, ip_vs_service_rcu_free);
488 else
489 ip_vs_service_free(svc);
26c15cfd 490 }
1da177e4
LT		 491}
492
493
494/*
495 * Returns hash value for real service
496 */
95c96174 497static inline unsigned int ip_vs_rs_hashkey(int af,
7937df15
JV		 498 const union nf_inet_addr *addr,
499 __be16 port)
1da177e4 500{
95c96174 501 register unsigned int porth = ntohs(port);
7937df15
JV		 502 __be32 addr_fold = addr->ip;
503
504#ifdef CONFIG_IP_VS_IPV6
505 if (af == AF_INET6)
506 addr_fold = addr->ip6[0]^addr->ip6[1]^
507 addr->ip6[2]^addr->ip6[3];
508#endif
1da177e4 509
7937df15 510 return (ntohl(addr_fold)^(porth>>IP_VS_RTAB_BITS)^porth)
1da177e4
LT		 511 & IP_VS_RTAB_MASK;
512}
513
276472ea
JA		 514/* Hash ip_vs_dest in rs_table by <proto,addr,port>. */
515static void ip_vs_rs_hash(struct netns_ipvs *ipvs, struct ip_vs_dest *dest)
1da177e4 516{
95c96174 517 unsigned int hash;
1da177e4 518
276472ea
JA		 519 if (dest->in_rs_table)
520 return;
1da177e4
LT		 521
522 /*
523 * Hash by proto,addr,port,
524 * which are the parameters of the real service.
525 */
7937df15
JV		 526 hash = ip_vs_rs_hashkey(dest->af, &dest->addr, dest->port);
527
276472ea
JA		 528 hlist_add_head_rcu(&dest->d_list, &ipvs->rs_table[hash]);
529 dest->in_rs_table = 1;
1da177e4
LT		 530}
531
276472ea
JA		 532/* Unhash ip_vs_dest from rs_table. */
533static void ip_vs_rs_unhash(struct ip_vs_dest *dest)
1da177e4
LT		 534{
535 /*
fc723250 536 * Remove it from the rs_table table.
1da177e4 537 */
276472ea
JA		 538 if (dest->in_rs_table) {
539 hlist_del_rcu(&dest->d_list);
540 dest->in_rs_table = 0;
1da177e4 541 }
1da177e4
LT		 542}
543
276472ea 544/* Check if real service by <proto,addr,port> is present */
48aed1b0 545bool ip_vs_has_real_service(struct netns_ipvs *ipvs, int af, __u16 protocol,
276472ea 546 const union nf_inet_addr *daddr, __be16 dport)
1da177e4 547{
95c96174 548 unsigned int hash;
1da177e4
LT		 549 struct ip_vs_dest *dest;
550
276472ea 551 /* Check for "full" addressed entries */
7937df15 552 hash = ip_vs_rs_hashkey(af, daddr, dport);
1da177e4 553
276472ea
JA		 554 rcu_read_lock();
555 hlist_for_each_entry_rcu(dest, &ipvs->rs_table[hash], d_list) {
556 if (dest->port == dport &&
557 dest->af == af &&
558 ip_vs_addr_equal(af, &dest->addr, daddr) &&
559 (dest->protocol == protocol || dest->vfwmark)) {
1da177e4 560 /* HIT */
276472ea
JA		 561 rcu_read_unlock();
562 return true;
1da177e4
LT		 563 }
564 }
276472ea 565 rcu_read_unlock();
1da177e4 566
276472ea 567 return false;
1da177e4
LT		 568}
569
39b97223
MA		 570/* Find real service record by <proto,addr,port>.
571 * In case of multiple records with the same <proto,addr,port>, only
572 * the first found record is returned.
573 *
574 * To be called under RCU lock.
575 */
576struct ip_vs_dest *ip_vs_find_real_service(struct netns_ipvs *ipvs, int af,
577 __u16 protocol,
578 const union nf_inet_addr *daddr,
579 __be16 dport)
580{
581 unsigned int hash;
582 struct ip_vs_dest *dest;
583
584 /* Check for "full" addressed entries */
585 hash = ip_vs_rs_hashkey(af, daddr, dport);
586
587 hlist_for_each_entry_rcu(dest, &ipvs->rs_table[hash], d_list) {
588 if (dest->port == dport &&
589 dest->af == af &&
590 ip_vs_addr_equal(af, &dest->addr, daddr) &&
591 (dest->protocol == protocol || dest->vfwmark)) {
592 /* HIT */
593 return dest;
594 }
595 }
596
597 return NULL;
598}
599
413c2d04
JA		 600/* Lookup destination by {addr,port} in the given service
601 * Called under RCU lock.
1da177e4
LT		 602 */
603static struct ip_vs_dest *
655eef10
AG		 604ip_vs_lookup_dest(struct ip_vs_service *svc, int dest_af,
605 const union nf_inet_addr *daddr, __be16 dport)
1da177e4
LT		 606{
607 struct ip_vs_dest *dest;
608
609 /*
610 * Find the destination for the given service
611 */
413c2d04 612 list_for_each_entry_rcu(dest, &svc->destinations, n_list) {
655eef10
AG		 613 if ((dest->af == dest_af) &&
614 ip_vs_addr_equal(dest_af, &dest->addr, daddr) &&
615 (dest->port == dport)) {
1da177e4
LT		 616 /* HIT */
617 return dest;
618 }
619 }
620
621 return NULL;
622}
623
1e356f9c
RB		 624/*
625 * Find destination by {daddr,dport,vaddr,protocol}
413c2d04 626 * Created to be used in ip_vs_process_message() in
1e356f9c
RB		 627 * the backup synchronization daemon. It finds the
628 * destination to be bound to the received connection
629 * on the backup.
413c2d04 630 * Called under RCU lock, no refcnt is returned.
1e356f9c 631 */
dc2add6f 632struct ip_vs_dest *ip_vs_find_dest(struct netns_ipvs *ipvs, int svc_af, int dest_af,
fc723250 633 const union nf_inet_addr *daddr,
7937df15
JV		 634 __be16 dport,
635 const union nf_inet_addr *vaddr,
52793dbe
JA		 636 __be16 vport, __u16 protocol, __u32 fwmark,
637 __u32 flags)
1e356f9c
RB		 638{
639 struct ip_vs_dest *dest;
640 struct ip_vs_service *svc;
52793dbe 641 __be16 port = dport;
1e356f9c 642
dc2add6f 643 svc = ip_vs_service_find(ipvs, svc_af, fwmark, protocol, vaddr, vport);
1e356f9c
RB		 644 if (!svc)
645 return NULL;
52793dbe
JA		 646 if (fwmark && (flags & IP_VS_CONN_F_FWD_MASK) != IP_VS_CONN_F_MASQ)
647 port = 0;
655eef10 648 dest = ip_vs_lookup_dest(svc, dest_af, daddr, port);
52793dbe 649 if (!dest)
655eef10 650 dest = ip_vs_lookup_dest(svc, dest_af, daddr, port ^ dport);
1e356f9c
RB		 651 return dest;
652}
1da177e4 653
026ace06
JA		 654void ip_vs_dest_dst_rcu_free(struct rcu_head *head)
655{
656 struct ip_vs_dest_dst *dest_dst = container_of(head,
657 struct ip_vs_dest_dst,
658 rcu_head);
659
660 dst_release(dest_dst->dst_cache);
661 kfree(dest_dst);
662}
663
664/* Release dest_dst and dst_cache for dest in user context */
d1deae4d
JA		 665static void __ip_vs_dst_cache_reset(struct ip_vs_dest *dest)
666{
026ace06 667 struct ip_vs_dest_dst *old;
d1deae4d 668
026ace06
JA		 669 old = rcu_dereference_protected(dest->dest_dst, 1);
670 if (old) {
671 RCU_INIT_POINTER(dest->dest_dst, NULL);
672 call_rcu(&old->rcu_head, ip_vs_dest_dst_rcu_free);
673 }
d1deae4d
JA		 674}
675
1da177e4
LT		 676/*
677 * Lookup dest by {svc,addr,port} in the destination trash.
678 * The destination trash is used to hold the destinations that are removed
679 * from the service table but are still referenced by some conn entries.
680 * The reason to add the destination trash is when the dest is temporary
681 * down (either by administrator or by monitor program), the dest can be
682 * picked back from the trash, the remaining connections to the dest can
683 * continue, and the counting information of the dest is also useful for
684 * scheduling.
685 */
686static struct ip_vs_dest *
ad147aa4
AG		 687ip_vs_trash_get_dest(struct ip_vs_service *svc, int dest_af,
688 const union nf_inet_addr *daddr, __be16 dport)
1da177e4 689{
578bc3ef 690 struct ip_vs_dest *dest;
3109d2f2 691 struct netns_ipvs *ipvs = svc->ipvs;
1da177e4
LT		 692
693 /*
694 * Find the destination in trash
695 */
578bc3ef
JA		 696 spin_lock_bh(&ipvs->dest_trash_lock);
697 list_for_each_entry(dest, &ipvs->dest_trash, t_list) {
7937df15
JV		 698 IP_VS_DBG_BUF(3, "Destination %u/%s:%u still in trash, "
699 "dest->refcnt=%d\n",
700 dest->vfwmark,
ad147aa4 701 IP_VS_DBG_ADDR(dest->af, &dest->addr),
7937df15
JV		 702 ntohs(dest->port),
703 atomic_read(&dest->refcnt));
ad147aa4
AG		 704 if (dest->af == dest_af &&
705 ip_vs_addr_equal(dest_af, &dest->addr, daddr) &&
1da177e4
LT		 706 dest->port == dport &&
707 dest->vfwmark == svc->fwmark &&
708 dest->protocol == svc->protocol &&
709 (svc->fwmark ||
7937df15 710 (ip_vs_addr_equal(svc->af, &dest->vaddr, &svc->addr) &&
1da177e4
LT		 711 dest->vport == svc->port))) {
712 /* HIT */
578bc3ef
JA		 713 list_del(&dest->t_list);
714 ip_vs_dest_hold(dest);
715 goto out;
1da177e4
LT		 716 }
717 }
718
578bc3ef
JA		 719 dest = NULL;
720
721out:
722 spin_unlock_bh(&ipvs->dest_trash_lock);
723
724 return dest;
1da177e4
LT		 725}
726
578bc3ef
JA		 727static void ip_vs_dest_free(struct ip_vs_dest *dest)
728{
bcbde4c0
JA		 729 struct ip_vs_service *svc = rcu_dereference_protected(dest->svc, 1);
730
578bc3ef 731 __ip_vs_dst_cache_reset(dest);
bcbde4c0 732 __ip_vs_svc_put(svc, false);
578bc3ef 733 free_percpu(dest->stats.cpustats);
9e4e948a 734 ip_vs_dest_put_and_free(dest);
578bc3ef 735}
1da177e4
LT		 736
737/*
738 * Clean up all the destinations in the trash
739 * Called by the ip_vs_control_cleanup()
740 *
741 * When the ip_vs_control_clearup is activated by ipvs module exit,
742 * the service tables must have been flushed and all the connections
743 * are expired, and the refcnt of each destination in the trash must
578bc3ef 744 * be 0, so we simply release them here.
1da177e4 745 */
6c0e14f5 746static void ip_vs_trash_cleanup(struct netns_ipvs *ipvs)
1da177e4
LT		 747{
748 struct ip_vs_dest *dest, *nxt;
749
578bc3ef
JA		 750 del_timer_sync(&ipvs->dest_trash_timer);
751 /* No need to use dest_trash_lock */
752 list_for_each_entry_safe(dest, nxt, &ipvs->dest_trash, t_list) {
753 list_del(&dest->t_list);
754 ip_vs_dest_free(dest);
1da177e4
LT		 755 }
756}
757
55a3d4e1 758static void
cd67cd5e 759ip_vs_copy_stats(struct ip_vs_kstats *dst, struct ip_vs_stats *src)
55a3d4e1 760{
cd67cd5e 761#define IP_VS_SHOW_STATS_COUNTER(c) dst->c = src->kstats.c - src->kstats0.c
55a3d4e1
JA		 762
763 spin_lock_bh(&src->lock);
764
765 IP_VS_SHOW_STATS_COUNTER(conns);
766 IP_VS_SHOW_STATS_COUNTER(inpkts);
767 IP_VS_SHOW_STATS_COUNTER(outpkts);
768 IP_VS_SHOW_STATS_COUNTER(inbytes);
769 IP_VS_SHOW_STATS_COUNTER(outbytes);
770
ea9f22cc 771 ip_vs_read_estimator(dst, src);
55a3d4e1
JA		 772
773 spin_unlock_bh(&src->lock);
774}
1da177e4 775
cd67cd5e
JA		 776static void
777ip_vs_export_stats_user(struct ip_vs_stats_user *dst, struct ip_vs_kstats *src)
778{
779 dst->conns = (u32)src->conns;
780 dst->inpkts = (u32)src->inpkts;
781 dst->outpkts = (u32)src->outpkts;
782 dst->inbytes = src->inbytes;
783 dst->outbytes = src->outbytes;
784 dst->cps = (u32)src->cps;
785 dst->inpps = (u32)src->inpps;
786 dst->outpps = (u32)src->outpps;
787 dst->inbps = (u32)src->inbps;
788 dst->outbps = (u32)src->outbps;
789}
790
1da177e4
LT		 791static void
792ip_vs_zero_stats(struct ip_vs_stats *stats)
793{
794 spin_lock_bh(&stats->lock);
e93615d0 795
55a3d4e1
JA		 796 /* get current counters as zero point, rates are zeroed */
797
cd67cd5e 798#define IP_VS_ZERO_STATS_COUNTER(c) stats->kstats0.c = stats->kstats.c
55a3d4e1
JA		 799
800 IP_VS_ZERO_STATS_COUNTER(conns);
801 IP_VS_ZERO_STATS_COUNTER(inpkts);
802 IP_VS_ZERO_STATS_COUNTER(outpkts);
803 IP_VS_ZERO_STATS_COUNTER(inbytes);
804 IP_VS_ZERO_STATS_COUNTER(outbytes);
805
1da177e4 806 ip_vs_zero_estimator(stats);
e93615d0 807
3a14a313 808 spin_unlock_bh(&stats->lock);
1da177e4
LT		 809}
810
811/*
812 * Update a destination in the given service
813 */
814static void
26c15cfd
JA		 815__ip_vs_update_dest(struct ip_vs_service *svc, struct ip_vs_dest *dest,
816 struct ip_vs_dest_user_kern *udest, int add)
1da177e4 817{
3109d2f2 818 struct netns_ipvs *ipvs = svc->ipvs;
bcbde4c0 819 struct ip_vs_service *old_svc;
ceec4c38 820 struct ip_vs_scheduler *sched;
1da177e4
LT		 821 int conn_flags;
822
391f503d
AG		 823 /* We cannot modify an address and change the address family */
824 BUG_ON(!add && udest->af != dest->af);
825
826 if (add && udest->af != svc->af)
827 ipvs->mixed_address_family_dests++;
828
1da177e4
LT		 829 /* set the weight and the flags */
830 atomic_set(&dest->weight, udest->weight);
3575792e
JA		 831 conn_flags = udest->conn_flags & IP_VS_CONN_F_DEST_MASK;
832 conn_flags |= IP_VS_CONN_F_INACTIVE;
1da177e4 833
1da177e4 834 /* set the IP_VS_CONN_F_NOOUTPUT flag if not masquerading/NAT */
3575792e 835 if ((conn_flags & IP_VS_CONN_F_FWD_MASK) != IP_VS_CONN_F_MASQ) {
1da177e4
LT		 836 conn_flags |= IP_VS_CONN_F_NOOUTPUT;
837 } else {
838 /*
fc723250 839 * Put the real service in rs_table if not present.
1da177e4
LT		 840 * For now only for NAT!
841 */
fc723250 842 ip_vs_rs_hash(ipvs, dest);
1da177e4
LT		 843 }
844 atomic_set(&dest->conn_flags, conn_flags);
845
846 /* bind the service */
bcbde4c0
JA		 847 old_svc = rcu_dereference_protected(dest->svc, 1);
848 if (!old_svc) {
1da177e4
LT		 849 __ip_vs_bind_svc(dest, svc);
850 } else {
bcbde4c0 851 if (old_svc != svc) {
1da177e4
LT		 852 ip_vs_zero_stats(&dest->stats);
853 __ip_vs_bind_svc(dest, svc);
bcbde4c0 854 __ip_vs_svc_put(old_svc, true);
1da177e4
LT		 855 }
856 }
857
858 /* set the dest status flags */
859 dest->flags |= IP_VS_DEST_F_AVAILABLE;
860
861 if (udest->u_threshold == 0 || udest->u_threshold > dest->u_threshold)
862 dest->flags &= ~IP_VS_DEST_F_OVERLOAD;
863 dest->u_threshold = udest->u_threshold;
864 dest->l_threshold = udest->l_threshold;
26c15cfd 865
6cff339b
AG		 866 dest->af = udest->af;
867
ff75f40f 868 spin_lock_bh(&dest->dst_lock);
d1deae4d 869 __ip_vs_dst_cache_reset(dest);
ff75f40f 870 spin_unlock_bh(&dest->dst_lock);
fc604767 871
26c15cfd 872 if (add) {
0f34d54b 873 ip_vs_start_estimator(svc->ipvs, &dest->stats);
413c2d04 874 list_add_rcu(&dest->n_list, &svc->destinations);
26c15cfd 875 svc->num_dests++;
05f00505
JA		 876 sched = rcu_dereference_protected(svc->scheduler, 1);
877 if (sched && sched->add_dest)
ceec4c38 878 sched->add_dest(svc, dest);
6b6df466 879 } else {
05f00505
JA		 880 sched = rcu_dereference_protected(svc->scheduler, 1);
881 if (sched && sched->upd_dest)
ceec4c38 882 sched->upd_dest(svc, dest);
26c15cfd 883 }
1da177e4
LT		 884}
885
886
887/*
888 * Create a destination for the given service
889 */
890static int
c860c6b1 891ip_vs_new_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest,
1da177e4
LT		 892 struct ip_vs_dest **dest_p)
893{
894 struct ip_vs_dest *dest;
827da44c 895 unsigned int atype, i;
1da177e4
LT		 896
897 EnterFunction(2);
898
09571c7a 899#ifdef CONFIG_IP_VS_IPV6
6cff339b 900 if (udest->af == AF_INET6) {
09571c7a 901 atype = ipv6_addr_type(&udest->addr.in6);
3bfb92f4
SW		 902 if ((!(atype & IPV6_ADDR_UNICAST) ||
903 atype & IPV6_ADDR_LINKLOCAL) &&
3109d2f2 904 !__ip_vs_addr_is_local_v6(svc->ipvs->net, &udest->addr.in6))
09571c7a
VB		 905 return -EINVAL;
906 } else
907#endif
908 {
3109d2f2 909 atype = inet_addr_type(svc->ipvs->net, udest->addr.ip);
09571c7a
VB		 910 if (atype != RTN_LOCAL && atype != RTN_UNICAST)
911 return -EINVAL;
912 }
1da177e4 913
dee06e47 914 dest = kzalloc(sizeof(struct ip_vs_dest), GFP_KERNEL);
0a9ee813 915 if (dest == NULL)
1da177e4 916 return -ENOMEM;
0a9ee813 917
b17fc996 918 dest->stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
0a9ee813 919 if (!dest->stats.cpustats)
b17fc996 920 goto err_alloc;
1da177e4 921
827da44c
JS		 922 for_each_possible_cpu(i) {
923 struct ip_vs_cpu_stats *ip_vs_dest_stats;
924 ip_vs_dest_stats = per_cpu_ptr(dest->stats.cpustats, i);
925 u64_stats_init(&ip_vs_dest_stats->syncp);
926 }
927
6cff339b 928 dest->af = udest->af;
1da177e4 929 dest->protocol = svc->protocol;
c860c6b1 930 dest->vaddr = svc->addr;
1da177e4
LT		 931 dest->vport = svc->port;
932 dest->vfwmark = svc->fwmark;
6cff339b 933 ip_vs_addr_copy(udest->af, &dest->addr, &udest->addr);
1da177e4
LT		 934 dest->port = udest->port;
935
936 atomic_set(&dest->activeconns, 0);
937 atomic_set(&dest->inactconns, 0);
938 atomic_set(&dest->persistconns, 0);
26c15cfd 939 atomic_set(&dest->refcnt, 1);
1da177e4 940
276472ea 941 INIT_HLIST_NODE(&dest->d_list);
1da177e4
LT		 942 spin_lock_init(&dest->dst_lock);
943 spin_lock_init(&dest->stats.lock);
26c15cfd 944 __ip_vs_update_dest(svc, dest, udest, 1);
1da177e4
LT		 945
946 *dest_p = dest;
947
948 LeaveFunction(2);
949 return 0;
b17fc996
HS		 950
951err_alloc:
952 kfree(dest);
953 return -ENOMEM;
1da177e4
LT		 954}
955
956
957/*
958 * Add a destination into an existing service
959 */
960static int
c860c6b1 961ip_vs_add_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
1da177e4
LT		 962{
963 struct ip_vs_dest *dest;
c860c6b1 964 union nf_inet_addr daddr;
014d730d 965 __be16 dport = udest->port;
1da177e4
LT		 966 int ret;
967
968 EnterFunction(2);
969
970 if (udest->weight < 0) {
1e3e238e 971 pr_err("%s(): server weight less than zero\n", __func__);
1da177e4
LT		 972 return -ERANGE;
973 }
974
975 if (udest->l_threshold > udest->u_threshold) {
1e3e238e
HE		 976 pr_err("%s(): lower threshold is higher than upper threshold\n",
977 __func__);
1da177e4
LT		 978 return -ERANGE;
979 }
980
6cff339b 981 ip_vs_addr_copy(udest->af, &daddr, &udest->addr);
c860c6b1 982
413c2d04
JA		 983 /* We use function that requires RCU lock */
984 rcu_read_lock();
655eef10 985 dest = ip_vs_lookup_dest(svc, udest->af, &daddr, dport);
413c2d04 986 rcu_read_unlock();
7937df15 987
1da177e4 988 if (dest != NULL) {
1e3e238e 989 IP_VS_DBG(1, "%s(): dest already exists\n", __func__);
1da177e4
LT		 990 return -EEXIST;
991 }
992
993 /*
994 * Check if the dest already exists in the trash and
995 * is from the same service
996 */
ad147aa4 997 dest = ip_vs_trash_get_dest(svc, udest->af, &daddr, dport);
7937df15 998
1da177e4 999 if (dest != NULL) {
cfc78c5a
JV		 1000 IP_VS_DBG_BUF(3, "Get destination %s:%u from trash, "
1001 "dest->refcnt=%d, service %u/%s:%u\n",
6cff339b 1002 IP_VS_DBG_ADDR(udest->af, &daddr), ntohs(dport),
cfc78c5a
JV		 1003 atomic_read(&dest->refcnt),
1004 dest->vfwmark,
1005 IP_VS_DBG_ADDR(svc->af, &dest->vaddr),
1006 ntohs(dest->vport));
1007
26c15cfd
JA		 1008 __ip_vs_update_dest(svc, dest, udest, 1);
1009 ret = 0;
1010 } else {
1da177e4 1011 /*
26c15cfd 1012 * Allocate and initialize the dest structure
1da177e4 1013 */
26c15cfd 1014 ret = ip_vs_new_dest(svc, udest, &dest);
1da177e4 1015 }
1da177e4
LT		 1016 LeaveFunction(2);
1017
26c15cfd 1018 return ret;
1da177e4
LT		 1019}
1020
1021
1022/*
1023 * Edit a destination in the given service
1024 */
1025static int
c860c6b1 1026ip_vs_edit_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
1da177e4
LT		 1027{
1028 struct ip_vs_dest *dest;
c860c6b1 1029 union nf_inet_addr daddr;
014d730d 1030 __be16 dport = udest->port;
1da177e4
LT		 1031
1032 EnterFunction(2);
1033
1034 if (udest->weight < 0) {
1e3e238e 1035 pr_err("%s(): server weight less than zero\n", __func__);
1da177e4
LT		 1036 return -ERANGE;
1037 }
1038
1039 if (udest->l_threshold > udest->u_threshold) {
1e3e238e
HE		 1040 pr_err("%s(): lower threshold is higher than upper threshold\n",
1041 __func__);
1da177e4
LT		 1042 return -ERANGE;
1043 }
1044
6cff339b 1045 ip_vs_addr_copy(udest->af, &daddr, &udest->addr);
c860c6b1 1046
413c2d04
JA		 1047 /* We use function that requires RCU lock */
1048 rcu_read_lock();
655eef10 1049 dest = ip_vs_lookup_dest(svc, udest->af, &daddr, dport);
413c2d04 1050 rcu_read_unlock();
7937df15 1051
1da177e4 1052 if (dest == NULL) {
1e3e238e 1053 IP_VS_DBG(1, "%s(): dest doesn't exist\n", __func__);
1da177e4
LT		 1054 return -ENOENT;
1055 }
1056
26c15cfd 1057 __ip_vs_update_dest(svc, dest, udest, 0);
1da177e4
LT		 1058 LeaveFunction(2);
1059
1060 return 0;
1061}
1062
1da177e4
LT		 1063/*
1064 * Delete a destination (must be already unlinked from the service)
1065 */
79ac82e0 1066static void __ip_vs_del_dest(struct netns_ipvs *ipvs, struct ip_vs_dest *dest,
578bc3ef 1067 bool cleanup)
1da177e4 1068{
0f34d54b 1069 ip_vs_stop_estimator(ipvs, &dest->stats);
1da177e4
LT		 1070
1071 /*
1072 * Remove it from the d-linked list with the real services.
1073 */
1da177e4 1074 ip_vs_rs_unhash(dest);
1da177e4 1075
578bc3ef
JA		 1076 spin_lock_bh(&ipvs->dest_trash_lock);
1077 IP_VS_DBG_BUF(3, "Moving dest %s:%u into trash, dest->refcnt=%d\n",
1078 IP_VS_DBG_ADDR(dest->af, &dest->addr), ntohs(dest->port),
1079 atomic_read(&dest->refcnt));
1080 if (list_empty(&ipvs->dest_trash) && !cleanup)
1081 mod_timer(&ipvs->dest_trash_timer,
bcbde4c0 1082 jiffies + (IP_VS_DEST_TRASH_PERIOD >> 1));
578bc3ef
JA		 1083 /* dest lives in trash without reference */
1084 list_add(&dest->t_list, &ipvs->dest_trash);
bcbde4c0 1085 dest->idle_start = 0;
578bc3ef
JA		 1086 spin_unlock_bh(&ipvs->dest_trash_lock);
1087 ip_vs_dest_put(dest);
1da177e4
LT		 1088}
1089
1090
1091/*
1092 * Unlink a destination from the given service
1093 */
1094static void __ip_vs_unlink_dest(struct ip_vs_service *svc,
1095 struct ip_vs_dest *dest,
1096 int svcupd)
1097{
1098 dest->flags &= ~IP_VS_DEST_F_AVAILABLE;
1099
1100 /*
1101 * Remove it from the d-linked destination list.
1102 */
413c2d04 1103 list_del_rcu(&dest->n_list);
1da177e4 1104 svc->num_dests--;
82dfb6f3 1105
391f503d 1106 if (dest->af != svc->af)
3109d2f2 1107 svc->ipvs->mixed_address_family_dests--;
391f503d 1108
ceec4c38
JA		 1109 if (svcupd) {
1110 struct ip_vs_scheduler *sched;
6b6df466 1111
ceec4c38 1112 sched = rcu_dereference_protected(svc->scheduler, 1);
05f00505 1113 if (sched && sched->del_dest)
ceec4c38
JA		 1114 sched->del_dest(svc, dest);
1115 }
1da177e4
LT		 1116}
1117
1118
1119/*
1120 * Delete a destination server in the given service
1121 */
1122static int
c860c6b1 1123ip_vs_del_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
1da177e4
LT		 1124{
1125 struct ip_vs_dest *dest;
014d730d 1126 __be16 dport = udest->port;
1da177e4
LT		 1127
1128 EnterFunction(2);
1129
413c2d04
JA		 1130 /* We use function that requires RCU lock */
1131 rcu_read_lock();
655eef10 1132 dest = ip_vs_lookup_dest(svc, udest->af, &udest->addr, dport);
413c2d04 1133 rcu_read_unlock();
c860c6b1 1134
1da177e4 1135 if (dest == NULL) {
1e3e238e 1136 IP_VS_DBG(1, "%s(): destination not found!\n", __func__);
1da177e4
LT		 1137 return -ENOENT;
1138 }
1139
1da177e4
LT		 1140 /*
1141 * Unlink dest from the service
1142 */
1143 __ip_vs_unlink_dest(svc, dest, 1);
1144
1da177e4
LT		 1145 /*
1146 * Delete the destination
1147 */
79ac82e0 1148 __ip_vs_del_dest(svc->ipvs, dest, false);
1da177e4
LT		 1149
1150 LeaveFunction(2);
1151
1152 return 0;
1153}
1154
578bc3ef
JA		 1155static void ip_vs_dest_trash_expire(unsigned long data)
1156{
8e743f1b 1157 struct netns_ipvs *ipvs = (struct netns_ipvs *)data;
578bc3ef 1158 struct ip_vs_dest *dest, *next;
bcbde4c0 1159 unsigned long now = jiffies;
578bc3ef
JA		 1160
1161 spin_lock(&ipvs->dest_trash_lock);
1162 list_for_each_entry_safe(dest, next, &ipvs->dest_trash, t_list) {
578bc3ef
JA		 1163 if (atomic_read(&dest->refcnt) > 0)
1164 continue;
bcbde4c0
JA		 1165 if (dest->idle_start) {
1166 if (time_before(now, dest->idle_start +
1167 IP_VS_DEST_TRASH_PERIOD))
1168 continue;
1169 } else {
1170 dest->idle_start = max(1UL, now);
1171 continue;
1172 }
578bc3ef
JA		 1173 IP_VS_DBG_BUF(3, "Removing destination %u/%s:%u from trash\n",
1174 dest->vfwmark,
bcbde4c0 1175 IP_VS_DBG_ADDR(dest->af, &dest->addr),
578bc3ef
JA		 1176 ntohs(dest->port));
1177 list_del(&dest->t_list);
1178 ip_vs_dest_free(dest);
1179 }
1180 if (!list_empty(&ipvs->dest_trash))
1181 mod_timer(&ipvs->dest_trash_timer,
bcbde4c0 1182 jiffies + (IP_VS_DEST_TRASH_PERIOD >> 1));
578bc3ef
JA		 1183 spin_unlock(&ipvs->dest_trash_lock);
1184}
1da177e4
LT		 1185
1186/*
1187 * Add a service into the service hash table
1188 */
1189static int
5060bd83 1190ip_vs_add_service(struct netns_ipvs *ipvs, struct ip_vs_service_user_kern *u,
c860c6b1 1191 struct ip_vs_service **svc_p)
1da177e4 1192{
827da44c 1193 int ret = 0, i;
1da177e4 1194 struct ip_vs_scheduler *sched = NULL;
0d1e71b0 1195 struct ip_vs_pe *pe = NULL;
1da177e4
LT		 1196 struct ip_vs_service *svc = NULL;
1197
1198 /* increase the module use count */
1199 ip_vs_use_count_inc();
1200
1201 /* Lookup the scheduler by 'u->sched_name' */
05f00505
JA		 1202 if (strcmp(u->sched_name, "none")) {
1203 sched = ip_vs_scheduler_get(u->sched_name);
1204 if (!sched) {
1205 pr_info("Scheduler module ip_vs_%s not found\n",
1206 u->sched_name);
1207 ret = -ENOENT;
1208 goto out_err;
1209 }
1da177e4
LT		 1210 }
1211
0d1e71b0 1212 if (u->pe_name && *u->pe_name) {
e9e5eee8 1213 pe = ip_vs_pe_getbyname(u->pe_name);
0d1e71b0
SH		 1214 if (pe == NULL) {
1215 pr_info("persistence engine module ip_vs_pe_%s "
1216 "not found\n", u->pe_name);
1217 ret = -ENOENT;
1218 goto out_err;
1219 }
1220 }
1221
f94fd041 1222#ifdef CONFIG_IP_VS_IPV6
0a925864
JA		 1223 if (u->af == AF_INET6) {
1224 __u32 plen = (__force __u32) u->netmask;
1225
1226 if (plen < 1 || plen > 128) {
1227 ret = -EINVAL;
1228 goto out_err;
1229 }
f94fd041
JV		 1230 }
1231#endif
1232
dee06e47 1233 svc = kzalloc(sizeof(struct ip_vs_service), GFP_KERNEL);
1da177e4 1234 if (svc == NULL) {
1e3e238e 1235 IP_VS_DBG(1, "%s(): no memory\n", __func__);
1da177e4
LT		 1236 ret = -ENOMEM;
1237 goto out_err;
1238 }
b17fc996 1239 svc->stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
0a54e939
JL		 1240 if (!svc->stats.cpustats) {
1241 ret = -ENOMEM;
b17fc996 1242 goto out_err;
0a54e939 1243 }
1da177e4 1244
827da44c
JS		 1245 for_each_possible_cpu(i) {
1246 struct ip_vs_cpu_stats *ip_vs_stats;
1247 ip_vs_stats = per_cpu_ptr(svc->stats.cpustats, i);
1248 u64_stats_init(&ip_vs_stats->syncp);
1249 }
1250
1251
1da177e4 1252 /* I'm the first user of the service */
1da177e4
LT		 1253 atomic_set(&svc->refcnt, 0);
1254
c860c6b1 1255 svc->af = u->af;
1da177e4 1256 svc->protocol = u->protocol;
c860c6b1 1257 ip_vs_addr_copy(svc->af, &svc->addr, &u->addr);
1da177e4
LT		 1258 svc->port = u->port;
1259 svc->fwmark = u->fwmark;
1260 svc->flags = u->flags;
1261 svc->timeout = u->timeout * HZ;
1262 svc->netmask = u->netmask;
3109d2f2 1263 svc->ipvs = ipvs;
1da177e4
LT		 1264
1265 INIT_LIST_HEAD(&svc->destinations);
ba3a3ce1 1266 spin_lock_init(&svc->sched_lock);
1da177e4
LT		 1267 spin_lock_init(&svc->stats.lock);
1268
1269 /* Bind the scheduler */
05f00505
JA		 1270 if (sched) {
1271 ret = ip_vs_bind_scheduler(svc, sched);
1272 if (ret)
1273 goto out_err;
1274 sched = NULL;
1275 }
1da177e4 1276
0d1e71b0 1277 /* Bind the ct retriever */
ceec4c38 1278 RCU_INIT_POINTER(svc->pe, pe);
0d1e71b0
SH		 1279 pe = NULL;
1280
1da177e4
LT		 1281 /* Update the virtual service counters */
1282 if (svc->port == FTPPORT)
763f8d0e 1283 atomic_inc(&ipvs->ftpsvc_counter);
1da177e4 1284 else if (svc->port == 0)
763f8d0e 1285 atomic_inc(&ipvs->nullsvc_counter);
39b97223
MA		 1286 if (svc->pe && svc->pe->conn_out)
1287 atomic_inc(&ipvs->conn_out_counter);
1da177e4 1288
0f34d54b 1289 ip_vs_start_estimator(ipvs, &svc->stats);
f94fd041
JV		 1290
1291 /* Count only IPv4 services for old get/setsockopt interface */
1292 if (svc->af == AF_INET)
a0840e2e 1293 ipvs->num_services++;
1da177e4
LT		 1294
1295 /* Hash the service into the service table */
1da177e4 1296 ip_vs_svc_hash(svc);
1da177e4
LT		 1297
1298 *svc_p = svc;
7a4f0761
HS		 1299 /* Now there is a service - full throttle */
1300 ipvs->enable = 1;
1da177e4
LT		 1301 return 0;
1302
b17fc996 1303
6e08bfb8 1304 out_err:
1da177e4 1305 if (svc != NULL) {
ceec4c38
JA		 1306 ip_vs_unbind_scheduler(svc, sched);
1307 ip_vs_service_free(svc);
1da177e4
LT		 1308 }
1309 ip_vs_scheduler_put(sched);
0d1e71b0 1310 ip_vs_pe_put(pe);
1da177e4 1311
1da177e4
LT		 1312 /* decrease the module use count */
1313 ip_vs_use_count_dec();
1314
1315 return ret;
1316}
1317
1318
1319/*
1320 * Edit a service and bind it with a new scheduler
1321 */
1322static int
c860c6b1 1323ip_vs_edit_service(struct ip_vs_service *svc, struct ip_vs_service_user_kern *u)
1da177e4 1324{
05f00505 1325 struct ip_vs_scheduler *sched = NULL, *old_sched;
0d1e71b0 1326 struct ip_vs_pe *pe = NULL, *old_pe = NULL;
1da177e4 1327 int ret = 0;
39b97223 1328 bool new_pe_conn_out, old_pe_conn_out;
1da177e4
LT		 1329
1330 /*
1331 * Lookup the scheduler, by 'u->sched_name'
1332 */
05f00505
JA		 1333 if (strcmp(u->sched_name, "none")) {
1334 sched = ip_vs_scheduler_get(u->sched_name);
1335 if (!sched) {
1336 pr_info("Scheduler module ip_vs_%s not found\n",
1337 u->sched_name);
1338 return -ENOENT;
1339 }
1da177e4
LT		 1340 }
1341 old_sched = sched;
1342
0d1e71b0 1343 if (u->pe_name && *u->pe_name) {
e9e5eee8 1344 pe = ip_vs_pe_getbyname(u->pe_name);
0d1e71b0
SH		 1345 if (pe == NULL) {
1346 pr_info("persistence engine module ip_vs_pe_%s "
1347 "not found\n", u->pe_name);
1348 ret = -ENOENT;
1349 goto out;
1350 }
1351 old_pe = pe;
1352 }
1353
f94fd041 1354#ifdef CONFIG_IP_VS_IPV6
0a925864
JA		 1355 if (u->af == AF_INET6) {
1356 __u32 plen = (__force __u32) u->netmask;
1357
1358 if (plen < 1 || plen > 128) {
1359 ret = -EINVAL;
1360 goto out;
1361 }
f94fd041
JV		 1362 }
1363#endif
1364
ceec4c38
JA		 1365 old_sched = rcu_dereference_protected(svc->scheduler, 1);
1366 if (sched != old_sched) {
05f00505
JA		 1367 if (old_sched) {
1368 ip_vs_unbind_scheduler(svc, old_sched);
1369 RCU_INIT_POINTER(svc->scheduler, NULL);
1370 /* Wait all svc->sched_data users */
1371 synchronize_rcu();
1372 }
ceec4c38 1373 /* Bind the new scheduler */
05f00505
JA		 1374 if (sched) {
1375 ret = ip_vs_bind_scheduler(svc, sched);
1376 if (ret) {
1377 ip_vs_scheduler_put(sched);
1378 goto out;
1379 }
ceec4c38 1380 }
ceec4c38 1381 }
1da177e4
LT		 1382
1383 /*
1384 * Set the flags and timeout value
1385 */
1386 svc->flags = u->flags | IP_VS_SVC_F_HASHED;
1387 svc->timeout = u->timeout * HZ;
1388 svc->netmask = u->netmask;
1389
ceec4c38 1390 old_pe = rcu_dereference_protected(svc->pe, 1);
39b97223 1391 if (pe != old_pe) {
ceec4c38 1392 rcu_assign_pointer(svc->pe, pe);
39b97223
MA		 1393 /* check for optional methods in new pe */
1394 new_pe_conn_out = (pe && pe->conn_out) ? true : false;
1395 old_pe_conn_out = (old_pe && old_pe->conn_out) ? true : false;
1396 if (new_pe_conn_out && !old_pe_conn_out)
1397 atomic_inc(&svc->ipvs->conn_out_counter);
1398 if (old_pe_conn_out && !new_pe_conn_out)
1399 atomic_dec(&svc->ipvs->conn_out_counter);
1400 }
1da177e4 1401
552ad65a 1402out:
6e08bfb8 1403 ip_vs_scheduler_put(old_sched);
0d1e71b0 1404 ip_vs_pe_put(old_pe);
1da177e4
LT		 1405 return ret;
1406}
1407
1da177e4
LT		 1408/*
1409 * Delete a service from the service list
1410 * - The service must be unlinked, unlocked and not referenced!
1411 * - We are called under _bh lock
1412 */
578bc3ef 1413static void __ip_vs_del_service(struct ip_vs_service *svc, bool cleanup)
1da177e4
LT		 1414{
1415 struct ip_vs_dest *dest, *nxt;
1416 struct ip_vs_scheduler *old_sched;
0d1e71b0 1417 struct ip_vs_pe *old_pe;
3109d2f2 1418 struct netns_ipvs *ipvs = svc->ipvs;
0d1e71b0 1419
f94fd041
JV		 1420 /* Count only IPv4 services for old get/setsockopt interface */
1421 if (svc->af == AF_INET)
a0840e2e 1422 ipvs->num_services--;
f94fd041 1423
0f34d54b 1424 ip_vs_stop_estimator(svc->ipvs, &svc->stats);
1da177e4
LT		 1425
1426 /* Unbind scheduler */
ceec4c38
JA		 1427 old_sched = rcu_dereference_protected(svc->scheduler, 1);
1428 ip_vs_unbind_scheduler(svc, old_sched);
6e08bfb8 1429 ip_vs_scheduler_put(old_sched);
1da177e4 1430
ceec4c38
JA		 1431 /* Unbind persistence engine, keep svc->pe */
1432 old_pe = rcu_dereference_protected(svc->pe, 1);
39b97223
MA		 1433 if (old_pe && old_pe->conn_out)
1434 atomic_dec(&ipvs->conn_out_counter);
0d1e71b0
SH		 1435 ip_vs_pe_put(old_pe);
1436
1da177e4
LT		 1437 /*
1438 * Unlink the whole destination list
1439 */
1440 list_for_each_entry_safe(dest, nxt, &svc->destinations, n_list) {
1441 __ip_vs_unlink_dest(svc, dest, 0);
79ac82e0 1442 __ip_vs_del_dest(svc->ipvs, dest, cleanup);
1da177e4
LT		 1443 }
1444
1445 /*
1446 * Update the virtual service counters
1447 */
1448 if (svc->port == FTPPORT)
763f8d0e 1449 atomic_dec(&ipvs->ftpsvc_counter);
1da177e4 1450 else if (svc->port == 0)
763f8d0e 1451 atomic_dec(&ipvs->nullsvc_counter);
1da177e4
LT		 1452
1453 /*
1454 * Free the service if nobody refers to it
1455 */
bcbde4c0 1456 __ip_vs_svc_put(svc, true);
1da177e4
LT		 1457
1458 /* decrease the module use count */
1459 ip_vs_use_count_dec();
1460}
1461
1462/*
26c15cfd 1463 * Unlink a service from list and try to delete it if its refcnt reached 0
1da177e4 1464 */
578bc3ef 1465static void ip_vs_unlink_service(struct ip_vs_service *svc, bool cleanup)
1da177e4 1466{
ceec4c38
JA		 1467 /* Hold svc to avoid double release from dest_trash */
1468 atomic_inc(&svc->refcnt);
1da177e4
LT		 1469 /*
1470 * Unhash it from the service table
1471 */
1da177e4
LT		 1472 ip_vs_svc_unhash(svc);
1473
578bc3ef 1474 __ip_vs_del_service(svc, cleanup);
26c15cfd
JA		 1475}
1476
1477/*
1478 * Delete a service from the service list
1479 */
1480static int ip_vs_del_service(struct ip_vs_service *svc)
1481{
1482 if (svc == NULL)
1483 return -EEXIST;
578bc3ef 1484 ip_vs_unlink_service(svc, false);
1da177e4
LT		 1485
1486 return 0;
1487}
1488
1489
1490/*
1491 * Flush all the virtual services
1492 */
ef7c599d 1493static int ip_vs_flush(struct netns_ipvs *ipvs, bool cleanup)
1da177e4
LT		 1494{
1495 int idx;
ceec4c38
JA		 1496 struct ip_vs_service *svc;
1497 struct hlist_node *n;
1da177e4
LT		 1498
1499 /*
fc723250 1500 * Flush the service table hashed by <netns,protocol,addr,port>
1da177e4
LT		 1501 */
1502 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38
JA		 1503 hlist_for_each_entry_safe(svc, n, &ip_vs_svc_table[idx],
1504 s_list) {
3109d2f2 1505 if (svc->ipvs == ipvs)
578bc3ef 1506 ip_vs_unlink_service(svc, cleanup);
1da177e4
LT		 1507 }
1508 }
1509
1510 /*
1511 * Flush the service table hashed by fwmark
1512 */
1513 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38
JA		 1514 hlist_for_each_entry_safe(svc, n, &ip_vs_svc_fwm_table[idx],
1515 f_list) {
3109d2f2 1516 if (svc->ipvs == ipvs)
578bc3ef 1517 ip_vs_unlink_service(svc, cleanup);
1da177e4
LT		 1518 }
1519 }
1520
1521 return 0;
1522}
1523
7a4f0761
HS		 1524/*
1525 * Delete service by {netns} in the service table.
1526 * Called by __ip_vs_cleanup()
1527 */
56d2169b 1528void ip_vs_service_net_cleanup(struct netns_ipvs *ipvs)
7a4f0761
HS		 1529{
1530 EnterFunction(2);
1531 /* Check for "full" addressed entries */
1532 mutex_lock(&__ip_vs_mutex);
ef7c599d 1533 ip_vs_flush(ipvs, true);
7a4f0761
HS		 1534 mutex_unlock(&__ip_vs_mutex);
1535 LeaveFunction(2);
1536}
d1deae4d
JA		 1537
1538/* Put all references for device (dst_cache) */
7a4f0761 1539static inline void
d1deae4d 1540ip_vs_forget_dev(struct ip_vs_dest *dest, struct net_device *dev)
7a4f0761 1541{
d717bb2a
JA		 1542 struct ip_vs_dest_dst *dest_dst;
1543
7a4f0761 1544 spin_lock_bh(&dest->dst_lock);
d717bb2a
JA		 1545 dest_dst = rcu_dereference_protected(dest->dest_dst, 1);
1546 if (dest_dst && dest_dst->dst_cache->dev == dev) {
7a4f0761
HS		 1547 IP_VS_DBG_BUF(3, "Reset dev:%s dest %s:%u ,dest->refcnt=%d\n",
1548 dev->name,
1549 IP_VS_DBG_ADDR(dest->af, &dest->addr),
1550 ntohs(dest->port),
1551 atomic_read(&dest->refcnt));
d1deae4d 1552 __ip_vs_dst_cache_reset(dest);
7a4f0761
HS		 1553 }
1554 spin_unlock_bh(&dest->dst_lock);
1555
1556}
313eae63
JA		 1557/* Netdev event receiver
1558 * Currently only NETDEV_DOWN is handled to release refs to cached dsts
7a4f0761
HS		 1559 */
1560static int ip_vs_dst_event(struct notifier_block *this, unsigned long event,
351638e7 1561 void *ptr)
7a4f0761 1562{
351638e7 1563 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
7a4f0761 1564 struct net *net = dev_net(dev);
283283c4 1565 struct netns_ipvs *ipvs = net_ipvs(net);
7a4f0761
HS		 1566 struct ip_vs_service *svc;
1567 struct ip_vs_dest *dest;
1568 unsigned int idx;
1569
313eae63 1570 if (event != NETDEV_DOWN || !ipvs)
7a4f0761
HS		 1571 return NOTIFY_DONE;
1572 IP_VS_DBG(3, "%s() dev=%s\n", __func__, dev->name);
1573 EnterFunction(2);
1574 mutex_lock(&__ip_vs_mutex);
1575 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38 1576 hlist_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
3109d2f2 1577 if (svc->ipvs == ipvs) {
7a4f0761
HS		 1578 list_for_each_entry(dest, &svc->destinations,
1579 n_list) {
d1deae4d 1580 ip_vs_forget_dev(dest, dev);
7a4f0761
HS		 1581 }
1582 }
1583 }
1584
ceec4c38 1585 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
3109d2f2 1586 if (svc->ipvs == ipvs) {
7a4f0761
HS		 1587 list_for_each_entry(dest, &svc->destinations,
1588 n_list) {
d1deae4d 1589 ip_vs_forget_dev(dest, dev);
7a4f0761
HS		 1590 }
1591 }
1592
1593 }
1594 }
1595
578bc3ef
JA		 1596 spin_lock_bh(&ipvs->dest_trash_lock);
1597 list_for_each_entry(dest, &ipvs->dest_trash, t_list) {
d1deae4d 1598 ip_vs_forget_dev(dest, dev);
7a4f0761 1599 }
578bc3ef 1600 spin_unlock_bh(&ipvs->dest_trash_lock);
7a4f0761
HS		 1601 mutex_unlock(&__ip_vs_mutex);
1602 LeaveFunction(2);
1603 return NOTIFY_DONE;
1604}
1da177e4
LT		 1605
1606/*
1607 * Zero counters in a service or all services
1608 */
1609static int ip_vs_zero_service(struct ip_vs_service *svc)
1610{
1611 struct ip_vs_dest *dest;
1612
1da177e4
LT		 1613 list_for_each_entry(dest, &svc->destinations, n_list) {
1614 ip_vs_zero_stats(&dest->stats);
1615 }
1616 ip_vs_zero_stats(&svc->stats);
1da177e4
LT		 1617 return 0;
1618}
1619
c60856c6 1620static int ip_vs_zero_all(struct netns_ipvs *ipvs)
1da177e4
LT		 1621{
1622 int idx;
1623 struct ip_vs_service *svc;
1624
1625 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38 1626 hlist_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
3109d2f2 1627 if (svc->ipvs == ipvs)
fc723250 1628 ip_vs_zero_service(svc);
1da177e4
LT		 1629 }
1630 }
1631
1632 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38 1633 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
3109d2f2 1634 if (svc->ipvs == ipvs)
fc723250 1635 ip_vs_zero_service(svc);
1da177e4
LT		 1636 }
1637 }
1638
3109d2f2 1639 ip_vs_zero_stats(&ipvs->tot_stats);
1da177e4
LT		 1640 return 0;
1641}
1642
14e40546 1643#ifdef CONFIG_SYSCTL
749c42b6
JA		 1644
1645static int zero;
1646static int three = 3;
1647
1da177e4 1648static int
fe2c6338 1649proc_do_defense_mode(struct ctl_table *table, int write,
1da177e4
LT		 1650 void __user *buffer, size_t *lenp, loff_t *ppos)
1651{
717e917d 1652 struct netns_ipvs *ipvs = table->extra2;
1da177e4
LT		 1653 int *valp = table->data;
1654 int val = *valp;
1655 int rc;
1656
8d65af78 1657 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1da177e4
LT		 1658 if (write && (*valp != val)) {
1659 if ((*valp < 0) || (*valp > 3)) {
1660 /* Restore the correct value */
1661 *valp = val;
1662 } else {
717e917d 1663 update_defense_level(ipvs);
1da177e4
LT		 1664 }
1665 }
1666 return rc;
1667}
1668
1da177e4 1669static int
fe2c6338 1670proc_do_sync_threshold(struct ctl_table *table, int write,
1da177e4
LT		 1671 void __user *buffer, size_t *lenp, loff_t *ppos)
1672{
1673 int *valp = table->data;
1674 int val[2];
1675 int rc;
1676
1677 /* backup the value first */
1678 memcpy(val, valp, sizeof(val));
1679
8d65af78 1680 rc = proc_dointvec(table, write, buffer, lenp, ppos);
749c42b6
JA		 1681 if (write && (valp[0] < 0 || valp[1] < 0 ||
1682 (valp[0] >= valp[1] && valp[1]))) {
1da177e4
LT		 1683 /* Restore the correct value */
1684 memcpy(valp, val, sizeof(val));
1685 }
1686 return rc;
1687}
1688
b880c1f0 1689static int
fe2c6338 1690proc_do_sync_mode(struct ctl_table *table, int write,
b880c1f0
HS		 1691 void __user *buffer, size_t *lenp, loff_t *ppos)
1692{
1693 int *valp = table->data;
1694 int val = *valp;
1695 int rc;
1696
1697 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1698 if (write && (*valp != val)) {
1699 if ((*valp < 0) || (*valp > 1)) {
1700 /* Restore the correct value */
1701 *valp = val;
f73181c8
PNA		 1702 }
1703 }
1704 return rc;
1705}
1706
1707static int
fe2c6338 1708proc_do_sync_ports(struct ctl_table *table, int write,
f73181c8
PNA		 1709 void __user *buffer, size_t *lenp, loff_t *ppos)
1710{
1711 int *valp = table->data;
1712 int val = *valp;
1713 int rc;
1714
1715 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1716 if (write && (*valp != val)) {
1717 if (*valp < 1 || !is_power_of_2(*valp)) {
1718 /* Restore the correct value */
1719 *valp = val;
b880c1f0
HS		 1720 }
1721 }
1722 return rc;
1723}
1da177e4
LT		 1724
1725/*
1726 * IPVS sysctl table (under the /proc/sys/net/ipv4/vs/)
a0840e2e 1727 * Do not change order or insert new entries without
503cf15a 1728 * align with netns init in ip_vs_control_net_init()
1da177e4
LT		 1729 */
1730
1731static struct ctl_table vs_vars[] = {
1732 {
1da177e4 1733 .procname = "amemthresh",
1da177e4
LT		 1734 .maxlen = sizeof(int),
1735 .mode = 0644,
6d9f239a 1736 .proc_handler = proc_dointvec,
1da177e4 1737 },
1da177e4 1738 {
1da177e4 1739 .procname = "am_droprate",
1da177e4
LT		 1740 .maxlen = sizeof(int),
1741 .mode = 0644,
6d9f239a 1742 .proc_handler = proc_dointvec,
1da177e4
LT		 1743 },
1744 {
1da177e4 1745 .procname = "drop_entry",
1da177e4
LT		 1746 .maxlen = sizeof(int),
1747 .mode = 0644,
6d9f239a 1748 .proc_handler = proc_do_defense_mode,
1da177e4
LT		 1749 },
1750 {
1da177e4 1751 .procname = "drop_packet",
1da177e4
LT		 1752 .maxlen = sizeof(int),
1753 .mode = 0644,
6d9f239a 1754 .proc_handler = proc_do_defense_mode,
1da177e4 1755 },
f4bc17cd
JA		 1756#ifdef CONFIG_IP_VS_NFCT
1757 {
1758 .procname = "conntrack",
f4bc17cd
JA		 1759 .maxlen = sizeof(int),
1760 .mode = 0644,
1761 .proc_handler = &proc_dointvec,
1762 },
1763#endif
1da177e4 1764 {
1da177e4 1765 .procname = "secure_tcp",
1da177e4
LT		 1766 .maxlen = sizeof(int),
1767 .mode = 0644,
6d9f239a 1768 .proc_handler = proc_do_defense_mode,
1da177e4 1769 },
8a803040
JA		 1770 {
1771 .procname = "snat_reroute",
8a803040
JA		 1772 .maxlen = sizeof(int),
1773 .mode = 0644,
1774 .proc_handler = &proc_dointvec,
1775 },
b880c1f0
HS		 1776 {
1777 .procname = "sync_version",
b880c1f0
HS		 1778 .maxlen = sizeof(int),
1779 .mode = 0644,
1780 .proc_handler = &proc_do_sync_mode,
1781 },
f73181c8
PNA		 1782 {
1783 .procname = "sync_ports",
1784 .maxlen = sizeof(int),
1785 .mode = 0644,
1786 .proc_handler = &proc_do_sync_ports,
1787 },
4d0c875d
JA		 1788 {
1789 .procname = "sync_persist_mode",
1790 .maxlen = sizeof(int),
1791 .mode = 0644,
1792 .proc_handler = proc_dointvec,
1793 },
1c003b15
PNA		 1794 {
1795 .procname = "sync_qlen_max",
07995674 1796 .maxlen = sizeof(unsigned long),
1c003b15 1797 .mode = 0644,
07995674 1798 .proc_handler = proc_doulongvec_minmax,
1c003b15
PNA		 1799 },
1800 {
1801 .procname = "sync_sock_size",
1802 .maxlen = sizeof(int),
1803 .mode = 0644,
1804 .proc_handler = proc_dointvec,
1805 },
a0840e2e
HS		 1806 {
1807 .procname = "cache_bypass",
1808 .maxlen = sizeof(int),
1809 .mode = 0644,
1810 .proc_handler = proc_dointvec,
1811 },
1812 {
1813 .procname = "expire_nodest_conn",
1814 .maxlen = sizeof(int),
1815 .mode = 0644,
1816 .proc_handler = proc_dointvec,
1817 },
c6c96c18
AF		 1818 {
1819 .procname = "sloppy_tcp",
1820 .maxlen = sizeof(int),
1821 .mode = 0644,
1822 .proc_handler = proc_dointvec,
1823 },
1824 {
1825 .procname = "sloppy_sctp",
1826 .maxlen = sizeof(int),
1827 .mode = 0644,
1828 .proc_handler = proc_dointvec,
1829 },
a0840e2e
HS		 1830 {
1831 .procname = "expire_quiescent_template",
1832 .maxlen = sizeof(int),
1833 .mode = 0644,
1834 .proc_handler = proc_dointvec,
1835 },
1836 {
1837 .procname = "sync_threshold",
1838 .maxlen =
1839 sizeof(((struct netns_ipvs *)0)->sysctl_sync_threshold),
1840 .mode = 0644,
1841 .proc_handler = proc_do_sync_threshold,
1842 },
749c42b6
JA		 1843 {
1844 .procname = "sync_refresh_period",
1845 .maxlen = sizeof(int),
1846 .mode = 0644,
1847 .proc_handler = proc_dointvec_jiffies,
1848 },
1849 {
1850 .procname = "sync_retries",
1851 .maxlen = sizeof(int),
1852 .mode = 0644,
1853 .proc_handler = proc_dointvec_minmax,
1854 .extra1 = &zero,
1855 .extra2 = &three,
1856 },
a0840e2e
HS		 1857 {
1858 .procname = "nat_icmp_send",
1859 .maxlen = sizeof(int),
1860 .mode = 0644,
1861 .proc_handler = proc_dointvec,
1862 },
3654e611
JA		 1863 {
1864 .procname = "pmtu_disc",
1865 .maxlen = sizeof(int),
1866 .mode = 0644,
1867 .proc_handler = proc_dointvec,
1868 },
0c12582f
JA		 1869 {
1870 .procname = "backup_only",
1871 .maxlen = sizeof(int),
1872 .mode = 0644,
1873 .proc_handler = proc_dointvec,
1874 },
d752c364
MRL		 1875 {
1876 .procname = "conn_reuse_mode",
1877 .maxlen = sizeof(int),
1878 .mode = 0644,
1879 .proc_handler = proc_dointvec,
1880 },
94485fed
AG		 1881 {
1882 .procname = "schedule_icmp",
1883 .maxlen = sizeof(int),
1884 .mode = 0644,
1885 .proc_handler = proc_dointvec,
1886 },
4e478098
AG		 1887 {
1888 .procname = "ignore_tunneled",
1889 .maxlen = sizeof(int),
1890 .mode = 0644,
1891 .proc_handler = proc_dointvec,
1892 },
a0840e2e
HS		 1893#ifdef CONFIG_IP_VS_DEBUG
1894 {
1895 .procname = "debug_level",
1896 .data = &sysctl_ip_vs_debug_level,
1897 .maxlen = sizeof(int),
1898 .mode = 0644,
1899 .proc_handler = proc_dointvec,
1900 },
1da177e4 1901#endif
f8572d8f 1902 { }
1da177e4
LT		 1903};
1904
14e40546 1905#endif
1da177e4 1906
1da177e4
LT		 1907#ifdef CONFIG_PROC_FS
1908
1909struct ip_vs_iter {
fc723250 1910 struct seq_net_private p; /* Do not move this, netns depends upon it*/
ceec4c38 1911 struct hlist_head *table;
1da177e4
LT		 1912 int bucket;
1913};
1914
1915/*
1916 * Write the contents of the VS rule table to a PROCfs file.
1917 * (It is kept just for backward compatibility)
1918 */
95c96174 1919static inline const char *ip_vs_fwd_name(unsigned int flags)
1da177e4
LT		 1920{
1921 switch (flags & IP_VS_CONN_F_FWD_MASK) {
1922 case IP_VS_CONN_F_LOCALNODE:
1923 return "Local";
1924 case IP_VS_CONN_F_TUNNEL:
1925 return "Tunnel";
1926 case IP_VS_CONN_F_DROUTE:
1927 return "Route";
1928 default:
1929 return "Masq";
1930 }
1931}
1932
1933
1934/* Get the Nth entry in the two lists */
1935static struct ip_vs_service *ip_vs_info_array(struct seq_file *seq, loff_t pos)
1936{
fc723250 1937 struct net *net = seq_file_net(seq);
3109d2f2 1938 struct netns_ipvs *ipvs = net_ipvs(net);
1da177e4
LT		 1939 struct ip_vs_iter *iter = seq->private;
1940 int idx;
1941 struct ip_vs_service *svc;
1942
1943 /* look in hash by protocol */
1944 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38 1945 hlist_for_each_entry_rcu(svc, &ip_vs_svc_table[idx], s_list) {
3109d2f2 1946 if ((svc->ipvs == ipvs) && pos-- == 0) {
1da177e4
LT		 1947 iter->table = ip_vs_svc_table;
1948 iter->bucket = idx;
1949 return svc;
1950 }
1951 }
1952 }
1953
1954 /* keep looking in fwmark */
1955 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38
JA		 1956 hlist_for_each_entry_rcu(svc, &ip_vs_svc_fwm_table[idx],
1957 f_list) {
3109d2f2 1958 if ((svc->ipvs == ipvs) && pos-- == 0) {
1da177e4
LT		 1959 iter->table = ip_vs_svc_fwm_table;
1960 iter->bucket = idx;
1961 return svc;
1962 }
1963 }
1964 }
1965
1966 return NULL;
1967}
1968
1969static void *ip_vs_info_seq_start(struct seq_file *seq, loff_t *pos)
371990ee 1970 __acquires(RCU)
1da177e4 1971{
ceec4c38 1972 rcu_read_lock();
1da177e4
LT		 1973 return *pos ? ip_vs_info_array(seq, *pos - 1) : SEQ_START_TOKEN;
1974}
1975
1976
1977static void *ip_vs_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1978{
ceec4c38 1979 struct hlist_node *e;
1da177e4
LT		 1980 struct ip_vs_iter *iter;
1981 struct ip_vs_service *svc;
1982
1983 ++*pos;
1984 if (v == SEQ_START_TOKEN)
1985 return ip_vs_info_array(seq,0);
1986
1987 svc = v;
1988 iter = seq->private;
1989
1990 if (iter->table == ip_vs_svc_table) {
1991 /* next service in table hashed by protocol */
ceec4c38
JA		 1992 e = rcu_dereference(hlist_next_rcu(&svc->s_list));
1993 if (e)
1994 return hlist_entry(e, struct ip_vs_service, s_list);
1da177e4
LT		 1995
1996 while (++iter->bucket < IP_VS_SVC_TAB_SIZE) {
ceec4c38
JA		 1997 hlist_for_each_entry_rcu(svc,
1998 &ip_vs_svc_table[iter->bucket],
1999 s_list) {
1da177e4
LT		 2000 return svc;
2001 }
2002 }
2003
2004 iter->table = ip_vs_svc_fwm_table;
2005 iter->bucket = -1;
2006 goto scan_fwmark;
2007 }
2008
2009 /* next service in hashed by fwmark */
ceec4c38
JA		 2010 e = rcu_dereference(hlist_next_rcu(&svc->f_list));
2011 if (e)
2012 return hlist_entry(e, struct ip_vs_service, f_list);
1da177e4
LT		 2013
2014 scan_fwmark:
2015 while (++iter->bucket < IP_VS_SVC_TAB_SIZE) {
ceec4c38
JA		 2016 hlist_for_each_entry_rcu(svc,
2017 &ip_vs_svc_fwm_table[iter->bucket],
2018 f_list)
1da177e4
LT		 2019 return svc;
2020 }
2021
2022 return NULL;
2023}
2024
2025static void ip_vs_info_seq_stop(struct seq_file *seq, void *v)
371990ee 2026 __releases(RCU)
1da177e4 2027{
ceec4c38 2028 rcu_read_unlock();
1da177e4
LT		 2029}
2030
2031
2032static int ip_vs_info_seq_show(struct seq_file *seq, void *v)
2033{
2034 if (v == SEQ_START_TOKEN) {
2035 seq_printf(seq,
2036 "IP Virtual Server version %d.%d.%d (size=%d)\n",
6f7edb48 2037 NVERSION(IP_VS_VERSION_CODE), ip_vs_conn_tab_size);
1da177e4
LT		 2038 seq_puts(seq,
2039 "Prot LocalAddress:Port Scheduler Flags\n");
2040 seq_puts(seq,
2041 " -> RemoteAddress:Port Forward Weight ActiveConn InActConn\n");
2042 } else {
2043 const struct ip_vs_service *svc = v;
2044 const struct ip_vs_iter *iter = seq->private;
2045 const struct ip_vs_dest *dest;
ceec4c38 2046 struct ip_vs_scheduler *sched = rcu_dereference(svc->scheduler);
05f00505 2047 char *sched_name = sched ? sched->name : "none";
1da177e4 2048
667a5f18
VB		 2049 if (iter->table == ip_vs_svc_table) {
2050#ifdef CONFIG_IP_VS_IPV6
2051 if (svc->af == AF_INET6)
5b095d98 2052 seq_printf(seq, "%s [%pI6]:%04X %s ",
667a5f18 2053 ip_vs_proto_name(svc->protocol),
38ff4fa4 2054 &svc->addr.in6,
667a5f18 2055 ntohs(svc->port),
05f00505 2056 sched_name);
667a5f18
VB		 2057 else
2058#endif
26ec037f 2059 seq_printf(seq, "%s %08X:%04X %s %s ",
667a5f18
VB		 2060 ip_vs_proto_name(svc->protocol),
2061 ntohl(svc->addr.ip),
2062 ntohs(svc->port),
05f00505 2063 sched_name,
26ec037f 2064 (svc->flags & IP_VS_SVC_F_ONEPACKET)?"ops ":"");
667a5f18 2065 } else {
26ec037f 2066 seq_printf(seq, "FWM %08X %s %s",
05f00505 2067 svc->fwmark, sched_name,
26ec037f 2068 (svc->flags & IP_VS_SVC_F_ONEPACKET)?"ops ":"");
667a5f18 2069 }
1da177e4
LT		 2070
2071 if (svc->flags & IP_VS_SVC_F_PERSISTENT)
2072 seq_printf(seq, "persistent %d %08X\n",
2073 svc->timeout,
2074 ntohl(svc->netmask));
2075 else
2076 seq_putc(seq, '\n');
2077
413c2d04 2078 list_for_each_entry_rcu(dest, &svc->destinations, n_list) {
667a5f18
VB		 2079#ifdef CONFIG_IP_VS_IPV6
2080 if (dest->af == AF_INET6)
2081 seq_printf(seq,
5b095d98 2082 " -> [%pI6]:%04X"
667a5f18 2083 " %-7s %-6d %-10d %-10d\n",
38ff4fa4 2084 &dest->addr.in6,
667a5f18
VB		 2085 ntohs(dest->port),
2086 ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
2087 atomic_read(&dest->weight),
2088 atomic_read(&dest->activeconns),
2089 atomic_read(&dest->inactconns));
2090 else
2091#endif
2092 seq_printf(seq,
2093 " -> %08X:%04X "
2094 "%-7s %-6d %-10d %-10d\n",
2095 ntohl(dest->addr.ip),
2096 ntohs(dest->port),
2097 ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
2098 atomic_read(&dest->weight),
2099 atomic_read(&dest->activeconns),
2100 atomic_read(&dest->inactconns));
2101
1da177e4
LT		 2102 }
2103 }
2104 return 0;
2105}
2106
56b3d975 2107static const struct seq_operations ip_vs_info_seq_ops = {
1da177e4
LT		 2108 .start = ip_vs_info_seq_start,
2109 .next = ip_vs_info_seq_next,
2110 .stop = ip_vs_info_seq_stop,
2111 .show = ip_vs_info_seq_show,
2112};
2113
2114static int ip_vs_info_open(struct inode *inode, struct file *file)
2115{
fc723250 2116 return seq_open_net(inode, file, &ip_vs_info_seq_ops,
cf7732e4 2117 sizeof(struct ip_vs_iter));
1da177e4
LT		 2118}
2119
9a32144e 2120static const struct file_operations ip_vs_info_fops = {
1da177e4
LT		 2121 .owner = THIS_MODULE,
2122 .open = ip_vs_info_open,
2123 .read = seq_read,
2124 .llseek = seq_lseek,
0f08190f 2125 .release = seq_release_net,
1da177e4
LT		 2126};
2127
1da177e4
LT		 2128static int ip_vs_stats_show(struct seq_file *seq, void *v)
2129{
b17fc996 2130 struct net *net = seq_file_single_net(seq);
cd67cd5e 2131 struct ip_vs_kstats show;
1da177e4
LT		 2132
2133/* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2134 seq_puts(seq,
2135 " Total Incoming Outgoing Incoming Outgoing\n");
2136 seq_printf(seq,
2137 " Conns Packets Packets Bytes Bytes\n");
2138
55a3d4e1 2139 ip_vs_copy_stats(&show, &net_ipvs(net)->tot_stats);
cd67cd5e
JA		 2140 seq_printf(seq, "%8LX %8LX %8LX %16LX %16LX\n\n",
2141 (unsigned long long)show.conns,
2142 (unsigned long long)show.inpkts,
2143 (unsigned long long)show.outpkts,
2144 (unsigned long long)show.inbytes,
2145 (unsigned long long)show.outbytes);
2146
2147/* 01234567 01234567 01234567 0123456701234567 0123456701234567*/
1da177e4 2148 seq_puts(seq,
cd67cd5e
JA		 2149 " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
2150 seq_printf(seq, "%8LX %8LX %8LX %16LX %16LX\n",
2151 (unsigned long long)show.cps,
2152 (unsigned long long)show.inpps,
2153 (unsigned long long)show.outpps,
2154 (unsigned long long)show.inbps,
2155 (unsigned long long)show.outbps);
1da177e4
LT		 2156
2157 return 0;
2158}
2159
2160static int ip_vs_stats_seq_open(struct inode *inode, struct file *file)
2161{
fc723250 2162 return single_open_net(inode, file, ip_vs_stats_show);
1da177e4
LT		 2163}
2164
9a32144e 2165static const struct file_operations ip_vs_stats_fops = {
1da177e4
LT		 2166 .owner = THIS_MODULE,
2167 .open = ip_vs_stats_seq_open,
2168 .read = seq_read,
2169 .llseek = seq_lseek,
0f08190f 2170 .release = single_release_net,
1da177e4
LT		 2171};
2172
b17fc996
HS		 2173static int ip_vs_stats_percpu_show(struct seq_file *seq, void *v)
2174{
2175 struct net *net = seq_file_single_net(seq);
2a0751af 2176 struct ip_vs_stats *tot_stats = &net_ipvs(net)->tot_stats;
371990ee 2177 struct ip_vs_cpu_stats __percpu *cpustats = tot_stats->cpustats;
cd67cd5e 2178 struct ip_vs_kstats kstats;
b17fc996
HS		 2179 int i;
2180
2181/* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2182 seq_puts(seq,
2183 " Total Incoming Outgoing Incoming Outgoing\n");
2184 seq_printf(seq,
2185 "CPU Conns Packets Packets Bytes Bytes\n");
2186
2187 for_each_possible_cpu(i) {
2a0751af
JA		 2188 struct ip_vs_cpu_stats *u = per_cpu_ptr(cpustats, i);
2189 unsigned int start;
cd67cd5e 2190 u64 conns, inpkts, outpkts, inbytes, outbytes;
2a0751af
JA		 2191
2192 do {
57a7744e 2193 start = u64_stats_fetch_begin_irq(&u->syncp);
cd67cd5e
JA		 2194 conns = u->cnt.conns;
2195 inpkts = u->cnt.inpkts;
2196 outpkts = u->cnt.outpkts;
2197 inbytes = u->cnt.inbytes;
2198 outbytes = u->cnt.outbytes;
57a7744e 2199 } while (u64_stats_fetch_retry_irq(&u->syncp, start));
2a0751af 2200
cd67cd5e
JA		 2201 seq_printf(seq, "%3X %8LX %8LX %8LX %16LX %16LX\n",
2202 i, (u64)conns, (u64)inpkts,
2203 (u64)outpkts, (u64)inbytes,
2204 (u64)outbytes);
b17fc996
HS		 2205 }
2206
cd67cd5e 2207 ip_vs_copy_stats(&kstats, tot_stats);
ea9f22cc 2208
cd67cd5e
JA		 2209 seq_printf(seq, " ~ %8LX %8LX %8LX %16LX %16LX\n\n",
2210 (unsigned long long)kstats.conns,
2211 (unsigned long long)kstats.inpkts,
2212 (unsigned long long)kstats.outpkts,
2213 (unsigned long long)kstats.inbytes,
2214 (unsigned long long)kstats.outbytes);
ea9f22cc 2215
cd67cd5e 2216/* ... 01234567 01234567 01234567 0123456701234567 0123456701234567 */
b17fc996 2217 seq_puts(seq,
cd67cd5e
JA		 2218 " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
2219 seq_printf(seq, " %8LX %8LX %8LX %16LX %16LX\n",
2220 kstats.cps,
2221 kstats.inpps,
2222 kstats.outpps,
2223 kstats.inbps,
2224 kstats.outbps);
b17fc996
HS		 2225
2226 return 0;
2227}
2228
2229static int ip_vs_stats_percpu_seq_open(struct inode *inode, struct file *file)
2230{
2231 return single_open_net(inode, file, ip_vs_stats_percpu_show);
2232}
2233
2234static const struct file_operations ip_vs_stats_percpu_fops = {
2235 .owner = THIS_MODULE,
2236 .open = ip_vs_stats_percpu_seq_open,
2237 .read = seq_read,
2238 .llseek = seq_lseek,
0f08190f 2239 .release = single_release_net,
b17fc996 2240};
1da177e4
LT		 2241#endif
2242
2243/*
2244 * Set timeout values for tcp tcpfin udp in the timeout_table.
2245 */
f1faa1e7 2246static int ip_vs_set_timeout(struct netns_ipvs *ipvs, struct ip_vs_timeout_user *u)
1da177e4 2247{
091bb34c 2248#if defined(CONFIG_IP_VS_PROTO_TCP) || defined(CONFIG_IP_VS_PROTO_UDP)
9330419d 2249 struct ip_vs_proto_data *pd;
091bb34c 2250#endif
9330419d 2251
1da177e4
LT		 2252 IP_VS_DBG(2, "Setting timeout tcp:%d tcpfin:%d udp:%d\n",
2253 u->tcp_timeout,
2254 u->tcp_fin_timeout,
2255 u->udp_timeout);
2256
2257#ifdef CONFIG_IP_VS_PROTO_TCP
2258 if (u->tcp_timeout) {
18d6ade6 2259 pd = ip_vs_proto_data_get(ipvs, IPPROTO_TCP);
9330419d 2260 pd->timeout_table[IP_VS_TCP_S_ESTABLISHED]
1da177e4
LT		 2261 = u->tcp_timeout * HZ;
2262 }
2263
2264 if (u->tcp_fin_timeout) {
18d6ade6 2265 pd = ip_vs_proto_data_get(ipvs, IPPROTO_TCP);
9330419d 2266 pd->timeout_table[IP_VS_TCP_S_FIN_WAIT]
1da177e4
LT		 2267 = u->tcp_fin_timeout * HZ;
2268 }
2269#endif
2270
2271#ifdef CONFIG_IP_VS_PROTO_UDP
2272 if (u->udp_timeout) {
18d6ade6 2273 pd = ip_vs_proto_data_get(ipvs, IPPROTO_UDP);
9330419d 2274 pd->timeout_table[IP_VS_UDP_S_NORMAL]
1da177e4
LT		 2275 = u->udp_timeout * HZ;
2276 }
2277#endif
2278 return 0;
2279}
2280
5fcf0cf6 2281#define CMDID(cmd) (cmd - IP_VS_BASE_CTL)
1da177e4 2282
5fcf0cf6
JA		 2283struct ip_vs_svcdest_user {
2284 struct ip_vs_service_user s;
2285 struct ip_vs_dest_user d;
1da177e4
LT		 2286};
2287
5fcf0cf6
JA		 2288static const unsigned char set_arglen[CMDID(IP_VS_SO_SET_MAX) + 1] = {
2289 [CMDID(IP_VS_SO_SET_ADD)] = sizeof(struct ip_vs_service_user),
2290 [CMDID(IP_VS_SO_SET_EDIT)] = sizeof(struct ip_vs_service_user),
2291 [CMDID(IP_VS_SO_SET_DEL)] = sizeof(struct ip_vs_service_user),
2292 [CMDID(IP_VS_SO_SET_ADDDEST)] = sizeof(struct ip_vs_svcdest_user),
2293 [CMDID(IP_VS_SO_SET_DELDEST)] = sizeof(struct ip_vs_svcdest_user),
2294 [CMDID(IP_VS_SO_SET_EDITDEST)] = sizeof(struct ip_vs_svcdest_user),
2295 [CMDID(IP_VS_SO_SET_TIMEOUT)] = sizeof(struct ip_vs_timeout_user),
2296 [CMDID(IP_VS_SO_SET_STARTDAEMON)] = sizeof(struct ip_vs_daemon_user),
2297 [CMDID(IP_VS_SO_SET_STOPDAEMON)] = sizeof(struct ip_vs_daemon_user),
2298 [CMDID(IP_VS_SO_SET_ZERO)] = sizeof(struct ip_vs_service_user),
2299};
2300
2301union ip_vs_set_arglen {
2302 struct ip_vs_service_user field_IP_VS_SO_SET_ADD;
2303 struct ip_vs_service_user field_IP_VS_SO_SET_EDIT;
2304 struct ip_vs_service_user field_IP_VS_SO_SET_DEL;
2305 struct ip_vs_svcdest_user field_IP_VS_SO_SET_ADDDEST;
2306 struct ip_vs_svcdest_user field_IP_VS_SO_SET_DELDEST;
2307 struct ip_vs_svcdest_user field_IP_VS_SO_SET_EDITDEST;
2308 struct ip_vs_timeout_user field_IP_VS_SO_SET_TIMEOUT;
2309 struct ip_vs_daemon_user field_IP_VS_SO_SET_STARTDAEMON;
2310 struct ip_vs_daemon_user field_IP_VS_SO_SET_STOPDAEMON;
2311 struct ip_vs_service_user field_IP_VS_SO_SET_ZERO;
2312};
2313
2314#define MAX_SET_ARGLEN sizeof(union ip_vs_set_arglen)
2315
c860c6b1
JV		 2316static void ip_vs_copy_usvc_compat(struct ip_vs_service_user_kern *usvc,
2317 struct ip_vs_service_user *usvc_compat)
2318{
0d1e71b0
SH		 2319 memset(usvc, 0, sizeof(*usvc));
2320
c860c6b1
JV		 2321 usvc->af = AF_INET;
2322 usvc->protocol = usvc_compat->protocol;
2323 usvc->addr.ip = usvc_compat->addr;
2324 usvc->port = usvc_compat->port;
2325 usvc->fwmark = usvc_compat->fwmark;
2326
2327 /* Deep copy of sched_name is not needed here */
2328 usvc->sched_name = usvc_compat->sched_name;
2329
2330 usvc->flags = usvc_compat->flags;
2331 usvc->timeout = usvc_compat->timeout;
2332 usvc->netmask = usvc_compat->netmask;
2333}
2334
2335static void ip_vs_copy_udest_compat(struct ip_vs_dest_user_kern *udest,
2336 struct ip_vs_dest_user *udest_compat)
2337{
0d1e71b0
SH		 2338 memset(udest, 0, sizeof(*udest));
2339
c860c6b1
JV		 2340 udest->addr.ip = udest_compat->addr;
2341 udest->port = udest_compat->port;
2342 udest->conn_flags = udest_compat->conn_flags;
2343 udest->weight = udest_compat->weight;
2344 udest->u_threshold = udest_compat->u_threshold;
2345 udest->l_threshold = udest_compat->l_threshold;
6cff339b 2346 udest->af = AF_INET;
c860c6b1
JV		 2347}
2348
1da177e4
LT		 2349static int
2350do_ip_vs_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len)
2351{
fc723250 2352 struct net *net = sock_net(sk);
1da177e4 2353 int ret;
5fcf0cf6 2354 unsigned char arg[MAX_SET_ARGLEN];
c860c6b1
JV		 2355 struct ip_vs_service_user *usvc_compat;
2356 struct ip_vs_service_user_kern usvc;
1da177e4 2357 struct ip_vs_service *svc;
c860c6b1
JV		 2358 struct ip_vs_dest_user *udest_compat;
2359 struct ip_vs_dest_user_kern udest;
ae1d48b2 2360 struct netns_ipvs *ipvs = net_ipvs(net);
1da177e4 2361
5fcf0cf6 2362 BUILD_BUG_ON(sizeof(arg) > 255);
df008c91 2363 if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
1da177e4
LT		 2364 return -EPERM;
2365
04bcef2a
AV		 2366 if (cmd < IP_VS_BASE_CTL || cmd > IP_VS_SO_SET_MAX)
2367 return -EINVAL;
5fcf0cf6
JA		 2368 if (len != set_arglen[CMDID(cmd)]) {
2369 IP_VS_DBG(1, "set_ctl: len %u != %u\n",
2370 len, set_arglen[CMDID(cmd)]);
1da177e4
LT		 2371 return -EINVAL;
2372 }
2373
2374 if (copy_from_user(arg, user, len) != 0)
2375 return -EFAULT;
2376
2377 /* increase the module use count */
2378 ip_vs_use_count_inc();
2379
ae1d48b2
HS		 2380 /* Handle daemons since they have another lock */
2381 if (cmd == IP_VS_SO_SET_STARTDAEMON ||
2382 cmd == IP_VS_SO_SET_STOPDAEMON) {
2383 struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg;
2384
e0b26cc9 2385 if (cmd == IP_VS_SO_SET_STARTDAEMON) {
e4ff6751
JA		 2386 struct ipvs_sync_daemon_cfg cfg;
2387
2388 memset(&cfg, 0, sizeof(cfg));
2389 strlcpy(cfg.mcast_ifn, dm->mcast_ifn,
2390 sizeof(cfg.mcast_ifn));
2391 cfg.syncid = dm->syncid;
e0b26cc9
JA		 2392 rtnl_lock();
2393 mutex_lock(&ipvs->sync_mutex);
6ac121d7 2394 ret = start_sync_thread(ipvs, &cfg, dm->state);
e0b26cc9
JA		 2395 mutex_unlock(&ipvs->sync_mutex);
2396 rtnl_unlock();
2397 } else {
2398 mutex_lock(&ipvs->sync_mutex);
b3cf3cbf 2399 ret = stop_sync_thread(ipvs, dm->state);
e0b26cc9
JA		 2400 mutex_unlock(&ipvs->sync_mutex);
2401 }
ae1d48b2
HS		 2402 goto out_dec;
2403 }
2404
7926dbfa 2405 mutex_lock(&__ip_vs_mutex);
1da177e4
LT		 2406 if (cmd == IP_VS_SO_SET_FLUSH) {
2407 /* Flush the virtual service */
ef7c599d 2408 ret = ip_vs_flush(ipvs, false);
1da177e4
LT		 2409 goto out_unlock;
2410 } else if (cmd == IP_VS_SO_SET_TIMEOUT) {
2411 /* Set timeout values for (tcp tcpfin udp) */
f1faa1e7 2412 ret = ip_vs_set_timeout(ipvs, (struct ip_vs_timeout_user *)arg);
1da177e4 2413 goto out_unlock;
1da177e4
LT		 2414 }
2415
c860c6b1
JV		 2416 usvc_compat = (struct ip_vs_service_user *)arg;
2417 udest_compat = (struct ip_vs_dest_user *)(usvc_compat + 1);
2418
2419 /* We only use the new structs internally, so copy userspace compat
2420 * structs to extended internal versions */
2421 ip_vs_copy_usvc_compat(&usvc, usvc_compat);
2422 ip_vs_copy_udest_compat(&udest, udest_compat);
1da177e4
LT		 2423
2424 if (cmd == IP_VS_SO_SET_ZERO) {
2425 /* if no service address is set, zero counters in all */
c860c6b1 2426 if (!usvc.fwmark && !usvc.addr.ip && !usvc.port) {
c60856c6 2427 ret = ip_vs_zero_all(ipvs);
1da177e4
LT		 2428 goto out_unlock;
2429 }
2430 }
2431
2906f66a
VMR		 2432 /* Check for valid protocol: TCP or UDP or SCTP, even for fwmark!=0 */
2433 if (usvc.protocol != IPPROTO_TCP && usvc.protocol != IPPROTO_UDP &&
2434 usvc.protocol != IPPROTO_SCTP) {
1e3e238e
HE		 2435 pr_err("set_ctl: invalid protocol: %d %pI4:%d %s\n",
2436 usvc.protocol, &usvc.addr.ip,
2437 ntohs(usvc.port), usvc.sched_name);
1da177e4
LT		 2438 ret = -EFAULT;
2439 goto out_unlock;
2440 }
2441
2442 /* Lookup the exact service by <protocol, addr, port> or fwmark */
ceec4c38 2443 rcu_read_lock();
c860c6b1 2444 if (usvc.fwmark == 0)
bb2e2a8c 2445 svc = __ip_vs_service_find(ipvs, usvc.af, usvc.protocol,
26c15cfd 2446 &usvc.addr, usvc.port);
1da177e4 2447 else
1ed8b947 2448 svc = __ip_vs_svc_fwm_find(ipvs, usvc.af, usvc.fwmark);
ceec4c38 2449 rcu_read_unlock();
1da177e4
LT		 2450
2451 if (cmd != IP_VS_SO_SET_ADD
c860c6b1 2452 && (svc == NULL || svc->protocol != usvc.protocol)) {
1da177e4 2453 ret = -ESRCH;
26c15cfd 2454 goto out_unlock;
1da177e4
LT		 2455 }
2456
2457 switch (cmd) {
2458 case IP_VS_SO_SET_ADD:
2459 if (svc != NULL)
2460 ret = -EEXIST;
2461 else
5060bd83 2462 ret = ip_vs_add_service(ipvs, &usvc, &svc);
1da177e4
LT		 2463 break;
2464 case IP_VS_SO_SET_EDIT:
c860c6b1 2465 ret = ip_vs_edit_service(svc, &usvc);
1da177e4
LT		 2466 break;
2467 case IP_VS_SO_SET_DEL:
2468 ret = ip_vs_del_service(svc);
2469 if (!ret)
2470 goto out_unlock;
2471 break;
2472 case IP_VS_SO_SET_ZERO:
2473 ret = ip_vs_zero_service(svc);
2474 break;
2475 case IP_VS_SO_SET_ADDDEST:
c860c6b1 2476 ret = ip_vs_add_dest(svc, &udest);
1da177e4
LT		 2477 break;
2478 case IP_VS_SO_SET_EDITDEST:
c860c6b1 2479 ret = ip_vs_edit_dest(svc, &udest);
1da177e4
LT		 2480 break;
2481 case IP_VS_SO_SET_DELDEST:
c860c6b1 2482 ret = ip_vs_del_dest(svc, &udest);
1da177e4
LT		 2483 break;
2484 default:
2485 ret = -EINVAL;
2486 }
2487
1da177e4 2488 out_unlock:
14cc3e2b 2489 mutex_unlock(&__ip_vs_mutex);
1da177e4
LT		 2490 out_dec:
2491 /* decrease the module use count */
2492 ip_vs_use_count_dec();
2493
2494 return ret;
2495}
2496
2497
1da177e4
LT		 2498static void
2499ip_vs_copy_service(struct ip_vs_service_entry *dst, struct ip_vs_service *src)
2500{
ceec4c38 2501 struct ip_vs_scheduler *sched;
cd67cd5e 2502 struct ip_vs_kstats kstats;
05f00505 2503 char *sched_name;
ceec4c38
JA		 2504
2505 sched = rcu_dereference_protected(src->scheduler, 1);
05f00505 2506 sched_name = sched ? sched->name : "none";
1da177e4 2507 dst->protocol = src->protocol;
e7ade46a 2508 dst->addr = src->addr.ip;
1da177e4
LT		 2509 dst->port = src->port;
2510 dst->fwmark = src->fwmark;
05f00505 2511 strlcpy(dst->sched_name, sched_name, sizeof(dst->sched_name));
1da177e4
LT		 2512 dst->flags = src->flags;
2513 dst->timeout = src->timeout / HZ;
2514 dst->netmask = src->netmask;
2515 dst->num_dests = src->num_dests;
cd67cd5e
JA		 2516 ip_vs_copy_stats(&kstats, &src->stats);
2517 ip_vs_export_stats_user(&dst->stats, &kstats);
1da177e4
LT		 2518}
2519
2520static inline int
b2876b77 2521__ip_vs_get_service_entries(struct netns_ipvs *ipvs,
fc723250 2522 const struct ip_vs_get_services *get,
1da177e4
LT		 2523 struct ip_vs_get_services __user *uptr)
2524{
2525 int idx, count=0;
2526 struct ip_vs_service *svc;
2527 struct ip_vs_service_entry entry;
2528 int ret = 0;
2529
2530 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38 2531 hlist_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
f94fd041 2532 /* Only expose IPv4 entries to old interface */
3109d2f2 2533 if (svc->af != AF_INET || (svc->ipvs != ipvs))
f94fd041
JV		 2534 continue;
2535
1da177e4
LT		 2536 if (count >= get->num_services)
2537 goto out;
4da62fc7 2538 memset(&entry, 0, sizeof(entry));
1da177e4
LT		 2539 ip_vs_copy_service(&entry, svc);
2540 if (copy_to_user(&uptr->entrytable[count],
2541 &entry, sizeof(entry))) {
2542 ret = -EFAULT;
2543 goto out;
2544 }
2545 count++;
2546 }
2547 }
2548
2549 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38 2550 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
f94fd041 2551 /* Only expose IPv4 entries to old interface */
3109d2f2 2552 if (svc->af != AF_INET || (svc->ipvs != ipvs))
f94fd041
JV		 2553 continue;
2554
1da177e4
LT		 2555 if (count >= get->num_services)
2556 goto out;
4da62fc7 2557 memset(&entry, 0, sizeof(entry));
1da177e4
LT		 2558 ip_vs_copy_service(&entry, svc);
2559 if (copy_to_user(&uptr->entrytable[count],
2560 &entry, sizeof(entry))) {
2561 ret = -EFAULT;
2562 goto out;
2563 }
2564 count++;
2565 }
2566 }
552ad65a 2567out:
1da177e4
LT		 2568 return ret;
2569}
2570
2571static inline int
08fff4c3 2572__ip_vs_get_dest_entries(struct netns_ipvs *ipvs, const struct ip_vs_get_dests *get,
1da177e4
LT		 2573 struct ip_vs_get_dests __user *uptr)
2574{
2575 struct ip_vs_service *svc;
b18610de 2576 union nf_inet_addr addr = { .ip = get->addr };
1da177e4
LT		 2577 int ret = 0;
2578
ceec4c38 2579 rcu_read_lock();
1da177e4 2580 if (get->fwmark)
1ed8b947 2581 svc = __ip_vs_svc_fwm_find(ipvs, AF_INET, get->fwmark);
1da177e4 2582 else
bb2e2a8c 2583 svc = __ip_vs_service_find(ipvs, AF_INET, get->protocol, &addr,
26c15cfd 2584 get->port);
ceec4c38 2585 rcu_read_unlock();
b18610de 2586
1da177e4
LT		 2587 if (svc) {
2588 int count = 0;
2589 struct ip_vs_dest *dest;
2590 struct ip_vs_dest_entry entry;
cd67cd5e 2591 struct ip_vs_kstats kstats;
1da177e4 2592
a8241c63 2593 memset(&entry, 0, sizeof(entry));
1da177e4
LT		 2594 list_for_each_entry(dest, &svc->destinations, n_list) {
2595 if (count >= get->num_dests)
2596 break;
2597
6cff339b
AG		 2598 /* Cannot expose heterogeneous members via sockopt
2599 * interface
2600 */
2601 if (dest->af != svc->af)
2602 continue;
2603
e7ade46a 2604 entry.addr = dest->addr.ip;
1da177e4
LT		 2605 entry.port = dest->port;
2606 entry.conn_flags = atomic_read(&dest->conn_flags);
2607 entry.weight = atomic_read(&dest->weight);
2608 entry.u_threshold = dest->u_threshold;
2609 entry.l_threshold = dest->l_threshold;
2610 entry.activeconns = atomic_read(&dest->activeconns);
2611 entry.inactconns = atomic_read(&dest->inactconns);
2612 entry.persistconns = atomic_read(&dest->persistconns);
cd67cd5e
JA		 2613 ip_vs_copy_stats(&kstats, &dest->stats);
2614 ip_vs_export_stats_user(&entry.stats, &kstats);
1da177e4
LT		 2615 if (copy_to_user(&uptr->entrytable[count],
2616 &entry, sizeof(entry))) {
2617 ret = -EFAULT;
2618 break;
2619 }
2620 count++;
2621 }
1da177e4
LT		 2622 } else
2623 ret = -ESRCH;
2624 return ret;
2625}
2626
2627static inline void
af540341 2628__ip_vs_get_timeouts(struct netns_ipvs *ipvs, struct ip_vs_timeout_user *u)
1da177e4 2629{
091bb34c 2630#if defined(CONFIG_IP_VS_PROTO_TCP) || defined(CONFIG_IP_VS_PROTO_UDP)
9330419d 2631 struct ip_vs_proto_data *pd;
091bb34c 2632#endif
9330419d 2633
b61a602e
AB		 2634 memset(u, 0, sizeof (*u));
2635
1da177e4 2636#ifdef CONFIG_IP_VS_PROTO_TCP
18d6ade6 2637 pd = ip_vs_proto_data_get(ipvs, IPPROTO_TCP);
9330419d
HS		 2638 u->tcp_timeout = pd->timeout_table[IP_VS_TCP_S_ESTABLISHED] / HZ;
2639 u->tcp_fin_timeout = pd->timeout_table[IP_VS_TCP_S_FIN_WAIT] / HZ;
1da177e4
LT		 2640#endif
2641#ifdef CONFIG_IP_VS_PROTO_UDP
18d6ade6 2642 pd = ip_vs_proto_data_get(ipvs, IPPROTO_UDP);
1da177e4 2643 u->udp_timeout =
9330419d 2644 pd->timeout_table[IP_VS_UDP_S_NORMAL] / HZ;
1da177e4
LT		 2645#endif
2646}
2647
5fcf0cf6
JA		 2648static const unsigned char get_arglen[CMDID(IP_VS_SO_GET_MAX) + 1] = {
2649 [CMDID(IP_VS_SO_GET_VERSION)] = 64,
2650 [CMDID(IP_VS_SO_GET_INFO)] = sizeof(struct ip_vs_getinfo),
2651 [CMDID(IP_VS_SO_GET_SERVICES)] = sizeof(struct ip_vs_get_services),
2652 [CMDID(IP_VS_SO_GET_SERVICE)] = sizeof(struct ip_vs_service_entry),
2653 [CMDID(IP_VS_SO_GET_DESTS)] = sizeof(struct ip_vs_get_dests),
2654 [CMDID(IP_VS_SO_GET_TIMEOUT)] = sizeof(struct ip_vs_timeout_user),
2655 [CMDID(IP_VS_SO_GET_DAEMON)] = 2 * sizeof(struct ip_vs_daemon_user),
2656};
1da177e4 2657
5fcf0cf6
JA		 2658union ip_vs_get_arglen {
2659 char field_IP_VS_SO_GET_VERSION[64];
2660 struct ip_vs_getinfo field_IP_VS_SO_GET_INFO;
2661 struct ip_vs_get_services field_IP_VS_SO_GET_SERVICES;
2662 struct ip_vs_service_entry field_IP_VS_SO_GET_SERVICE;
2663 struct ip_vs_get_dests field_IP_VS_SO_GET_DESTS;
2664 struct ip_vs_timeout_user field_IP_VS_SO_GET_TIMEOUT;
2665 struct ip_vs_daemon_user field_IP_VS_SO_GET_DAEMON[2];
1da177e4
LT		 2666};
2667
5fcf0cf6
JA		 2668#define MAX_GET_ARGLEN sizeof(union ip_vs_get_arglen)
2669
1da177e4
LT		 2670static int
2671do_ip_vs_get_ctl(struct sock *sk, int cmd, void __user *user, int *len)
2672{
5fcf0cf6 2673 unsigned char arg[MAX_GET_ARGLEN];
1da177e4 2674 int ret = 0;
04bcef2a 2675 unsigned int copylen;
fc723250 2676 struct net *net = sock_net(sk);
f131315f 2677 struct netns_ipvs *ipvs = net_ipvs(net);
1da177e4 2678
fc723250 2679 BUG_ON(!net);
5fcf0cf6 2680 BUILD_BUG_ON(sizeof(arg) > 255);
df008c91 2681 if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
1da177e4
LT		 2682 return -EPERM;
2683
04bcef2a
AV		 2684 if (cmd < IP_VS_BASE_CTL || cmd > IP_VS_SO_GET_MAX)
2685 return -EINVAL;
2686
5fcf0cf6
JA		 2687 copylen = get_arglen[CMDID(cmd)];
2688 if (*len < (int) copylen) {
2689 IP_VS_DBG(1, "get_ctl: len %d < %u\n", *len, copylen);
1da177e4
LT		 2690 return -EINVAL;
2691 }
2692
04bcef2a 2693 if (copy_from_user(arg, user, copylen) != 0)
1da177e4 2694 return -EFAULT;
ae1d48b2
HS		 2695 /*
2696 * Handle daemons first since it has its own locking
2697 */
2698 if (cmd == IP_VS_SO_GET_DAEMON) {
2699 struct ip_vs_daemon_user d[2];
2700
2701 memset(&d, 0, sizeof(d));
7926dbfa 2702 mutex_lock(&ipvs->sync_mutex);
ae1d48b2
HS		 2703 if (ipvs->sync_state & IP_VS_STATE_MASTER) {
2704 d[0].state = IP_VS_STATE_MASTER;
e4ff6751 2705 strlcpy(d[0].mcast_ifn, ipvs->mcfg.mcast_ifn,
ae1d48b2 2706 sizeof(d[0].mcast_ifn));
e4ff6751 2707 d[0].syncid = ipvs->mcfg.syncid;
ae1d48b2
HS		 2708 }
2709 if (ipvs->sync_state & IP_VS_STATE_BACKUP) {
2710 d[1].state = IP_VS_STATE_BACKUP;
e4ff6751 2711 strlcpy(d[1].mcast_ifn, ipvs->bcfg.mcast_ifn,
ae1d48b2 2712 sizeof(d[1].mcast_ifn));
e4ff6751 2713 d[1].syncid = ipvs->bcfg.syncid;
ae1d48b2
HS		 2714 }
2715 if (copy_to_user(user, &d, sizeof(d)) != 0)
2716 ret = -EFAULT;
2717 mutex_unlock(&ipvs->sync_mutex);
2718 return ret;
2719 }
1da177e4 2720
7926dbfa 2721 mutex_lock(&__ip_vs_mutex);
1da177e4
LT		 2722 switch (cmd) {
2723 case IP_VS_SO_GET_VERSION:
2724 {
2725 char buf[64];
2726
2727 sprintf(buf, "IP Virtual Server version %d.%d.%d (size=%d)",
6f7edb48 2728 NVERSION(IP_VS_VERSION_CODE), ip_vs_conn_tab_size);
1da177e4
LT		 2729 if (copy_to_user(user, buf, strlen(buf)+1) != 0) {
2730 ret = -EFAULT;
2731 goto out;
2732 }
2733 *len = strlen(buf)+1;
2734 }
2735 break;
2736
2737 case IP_VS_SO_GET_INFO:
2738 {
2739 struct ip_vs_getinfo info;
2740 info.version = IP_VS_VERSION_CODE;
6f7edb48 2741 info.size = ip_vs_conn_tab_size;
a0840e2e 2742 info.num_services = ipvs->num_services;
1da177e4
LT		 2743 if (copy_to_user(user, &info, sizeof(info)) != 0)
2744 ret = -EFAULT;
2745 }
2746 break;
2747
2748 case IP_VS_SO_GET_SERVICES:
2749 {
2750 struct ip_vs_get_services *get;
2751 int size;
2752
2753 get = (struct ip_vs_get_services *)arg;
2754 size = sizeof(*get) +
2755 sizeof(struct ip_vs_service_entry) * get->num_services;
2756 if (*len != size) {
1e3e238e 2757 pr_err("length: %u != %u\n", *len, size);
1da177e4
LT		 2758 ret = -EINVAL;
2759 goto out;
2760 }
b2876b77 2761 ret = __ip_vs_get_service_entries(ipvs, get, user);
1da177e4
LT		 2762 }
2763 break;
2764
2765 case IP_VS_SO_GET_SERVICE:
2766 {
2767 struct ip_vs_service_entry *entry;
2768 struct ip_vs_service *svc;
b18610de 2769 union nf_inet_addr addr;
1da177e4
LT		 2770
2771 entry = (struct ip_vs_service_entry *)arg;
b18610de 2772 addr.ip = entry->addr;
ceec4c38 2773 rcu_read_lock();
1da177e4 2774 if (entry->fwmark)
1ed8b947 2775 svc = __ip_vs_svc_fwm_find(ipvs, AF_INET, entry->fwmark);
1da177e4 2776 else
bb2e2a8c 2777 svc = __ip_vs_service_find(ipvs, AF_INET,
fc723250
HS		 2778 entry->protocol, &addr,
2779 entry->port);
ceec4c38 2780 rcu_read_unlock();
1da177e4
LT		 2781 if (svc) {
2782 ip_vs_copy_service(entry, svc);
2783 if (copy_to_user(user, entry, sizeof(*entry)) != 0)
2784 ret = -EFAULT;
1da177e4
LT		 2785 } else
2786 ret = -ESRCH;
2787 }
2788 break;
2789
2790 case IP_VS_SO_GET_DESTS:
2791 {
2792 struct ip_vs_get_dests *get;
2793 int size;
2794
2795 get = (struct ip_vs_get_dests *)arg;
2796 size = sizeof(*get) +
2797 sizeof(struct ip_vs_dest_entry) * get->num_dests;
2798 if (*len != size) {
1e3e238e 2799 pr_err("length: %u != %u\n", *len, size);
1da177e4
LT		 2800 ret = -EINVAL;
2801 goto out;
2802 }
08fff4c3 2803 ret = __ip_vs_get_dest_entries(ipvs, get, user);
1da177e4
LT		 2804 }
2805 break;
2806
2807 case IP_VS_SO_GET_TIMEOUT:
2808 {
2809 struct ip_vs_timeout_user t;
2810
af540341 2811 __ip_vs_get_timeouts(ipvs, &t);
1da177e4
LT		 2812 if (copy_to_user(user, &t, sizeof(t)) != 0)
2813 ret = -EFAULT;
2814 }
2815 break;
2816
1da177e4
LT		 2817 default:
2818 ret = -EINVAL;
2819 }
2820
552ad65a 2821out:
14cc3e2b 2822 mutex_unlock(&__ip_vs_mutex);
1da177e4
LT		 2823 return ret;
2824}
2825
2826
2827static struct nf_sockopt_ops ip_vs_sockopts = {
2828 .pf = PF_INET,
2829 .set_optmin = IP_VS_BASE_CTL,
2830 .set_optmax = IP_VS_SO_SET_MAX+1,
2831 .set = do_ip_vs_set_ctl,
2832 .get_optmin = IP_VS_BASE_CTL,
2833 .get_optmax = IP_VS_SO_GET_MAX+1,
2834 .get = do_ip_vs_get_ctl,
16fcec35 2835 .owner = THIS_MODULE,
1da177e4
LT		 2836};
2837
9a812198
JV		 2838/*
2839 * Generic Netlink interface
2840 */
2841
2842/* IPVS genetlink family */
2843static struct genl_family ip_vs_genl_family = {
2844 .id = GENL_ID_GENERATE,
2845 .hdrsize = 0,
2846 .name = IPVS_GENL_NAME,
2847 .version = IPVS_GENL_VERSION,
2848 .maxattr = IPVS_CMD_MAX,
c6d2d445 2849 .netnsok = true, /* Make ipvsadm to work on netns */
9a812198
JV		 2850};
2851
2852/* Policy used for first-level command attributes */
2853static const struct nla_policy ip_vs_cmd_policy[IPVS_CMD_ATTR_MAX + 1] = {
2854 [IPVS_CMD_ATTR_SERVICE] = { .type = NLA_NESTED },
2855 [IPVS_CMD_ATTR_DEST] = { .type = NLA_NESTED },
2856 [IPVS_CMD_ATTR_DAEMON] = { .type = NLA_NESTED },
2857 [IPVS_CMD_ATTR_TIMEOUT_TCP] = { .type = NLA_U32 },
2858 [IPVS_CMD_ATTR_TIMEOUT_TCP_FIN] = { .type = NLA_U32 },
2859 [IPVS_CMD_ATTR_TIMEOUT_UDP] = { .type = NLA_U32 },
2860};
2861
2862/* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DAEMON */
2863static const struct nla_policy ip_vs_daemon_policy[IPVS_DAEMON_ATTR_MAX + 1] = {
2864 [IPVS_DAEMON_ATTR_STATE] = { .type = NLA_U32 },
2865 [IPVS_DAEMON_ATTR_MCAST_IFN] = { .type = NLA_NUL_STRING,
2866 .len = IP_VS_IFNAME_MAXLEN },
2867 [IPVS_DAEMON_ATTR_SYNC_ID] = { .type = NLA_U32 },
e4ff6751 2868 [IPVS_DAEMON_ATTR_SYNC_MAXLEN] = { .type = NLA_U16 },
d3328817
JA		 2869 [IPVS_DAEMON_ATTR_MCAST_GROUP] = { .type = NLA_U32 },
2870 [IPVS_DAEMON_ATTR_MCAST_GROUP6] = { .len = sizeof(struct in6_addr) },
2871 [IPVS_DAEMON_ATTR_MCAST_PORT] = { .type = NLA_U16 },
2872 [IPVS_DAEMON_ATTR_MCAST_TTL] = { .type = NLA_U8 },
9a812198
JV		 2873};
2874
2875/* Policy used for attributes in nested attribute IPVS_CMD_ATTR_SERVICE */
2876static const struct nla_policy ip_vs_svc_policy[IPVS_SVC_ATTR_MAX + 1] = {
2877 [IPVS_SVC_ATTR_AF] = { .type = NLA_U16 },
2878 [IPVS_SVC_ATTR_PROTOCOL] = { .type = NLA_U16 },
2879 [IPVS_SVC_ATTR_ADDR] = { .type = NLA_BINARY,
2880 .len = sizeof(union nf_inet_addr) },
2881 [IPVS_SVC_ATTR_PORT] = { .type = NLA_U16 },
2882 [IPVS_SVC_ATTR_FWMARK] = { .type = NLA_U32 },
2883 [IPVS_SVC_ATTR_SCHED_NAME] = { .type = NLA_NUL_STRING,
2884 .len = IP_VS_SCHEDNAME_MAXLEN },
0d1e71b0
SH		 2885 [IPVS_SVC_ATTR_PE_NAME] = { .type = NLA_NUL_STRING,
2886 .len = IP_VS_PENAME_MAXLEN },
9a812198
JV		 2887 [IPVS_SVC_ATTR_FLAGS] = { .type = NLA_BINARY,
2888 .len = sizeof(struct ip_vs_flags) },
2889 [IPVS_SVC_ATTR_TIMEOUT] = { .type = NLA_U32 },
2890 [IPVS_SVC_ATTR_NETMASK] = { .type = NLA_U32 },
2891 [IPVS_SVC_ATTR_STATS] = { .type = NLA_NESTED },
2892};
2893
2894/* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DEST */
2895static const struct nla_policy ip_vs_dest_policy[IPVS_DEST_ATTR_MAX + 1] = {
2896 [IPVS_DEST_ATTR_ADDR] = { .type = NLA_BINARY,
2897 .len = sizeof(union nf_inet_addr) },
2898 [IPVS_DEST_ATTR_PORT] = { .type = NLA_U16 },
2899 [IPVS_DEST_ATTR_FWD_METHOD] = { .type = NLA_U32 },
2900 [IPVS_DEST_ATTR_WEIGHT] = { .type = NLA_U32 },
2901 [IPVS_DEST_ATTR_U_THRESH] = { .type = NLA_U32 },
2902 [IPVS_DEST_ATTR_L_THRESH] = { .type = NLA_U32 },
2903 [IPVS_DEST_ATTR_ACTIVE_CONNS] = { .type = NLA_U32 },
2904 [IPVS_DEST_ATTR_INACT_CONNS] = { .type = NLA_U32 },
2905 [IPVS_DEST_ATTR_PERSIST_CONNS] = { .type = NLA_U32 },
2906 [IPVS_DEST_ATTR_STATS] = { .type = NLA_NESTED },
6cff339b 2907 [IPVS_DEST_ATTR_ADDR_FAMILY] = { .type = NLA_U16 },
9a812198
JV		 2908};
2909
2910static int ip_vs_genl_fill_stats(struct sk_buff *skb, int container_type,
cd67cd5e
JA		 2911 struct ip_vs_kstats *kstats)
2912{
2913 struct nlattr *nl_stats = nla_nest_start(skb, container_type);
2914
2915 if (!nl_stats)
2916 return -EMSGSIZE;
2917
2918 if (nla_put_u32(skb, IPVS_STATS_ATTR_CONNS, (u32)kstats->conns) ||
2919 nla_put_u32(skb, IPVS_STATS_ATTR_INPKTS, (u32)kstats->inpkts) ||
2920 nla_put_u32(skb, IPVS_STATS_ATTR_OUTPKTS, (u32)kstats->outpkts) ||
cbdeafd7
ND		 2921 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_INBYTES, kstats->inbytes,
2922 IPVS_STATS_ATTR_PAD) ||
2923 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_OUTBYTES, kstats->outbytes,
2924 IPVS_STATS_ATTR_PAD) ||
cd67cd5e
JA		 2925 nla_put_u32(skb, IPVS_STATS_ATTR_CPS, (u32)kstats->cps) ||
2926 nla_put_u32(skb, IPVS_STATS_ATTR_INPPS, (u32)kstats->inpps) ||
2927 nla_put_u32(skb, IPVS_STATS_ATTR_OUTPPS, (u32)kstats->outpps) ||
2928 nla_put_u32(skb, IPVS_STATS_ATTR_INBPS, (u32)kstats->inbps) ||
2929 nla_put_u32(skb, IPVS_STATS_ATTR_OUTBPS, (u32)kstats->outbps))
2930 goto nla_put_failure;
2931 nla_nest_end(skb, nl_stats);
2932
2933 return 0;
2934
2935nla_put_failure:
2936 nla_nest_cancel(skb, nl_stats);
2937 return -EMSGSIZE;
2938}
2939
2940static int ip_vs_genl_fill_stats64(struct sk_buff *skb, int container_type,
2941 struct ip_vs_kstats *kstats)
9a812198
JV		 2942{
2943 struct nlattr *nl_stats = nla_nest_start(skb, container_type);
cd67cd5e 2944
9a812198
JV		 2945 if (!nl_stats)
2946 return -EMSGSIZE;
2947
cbdeafd7
ND		 2948 if (nla_put_u64_64bit(skb, IPVS_STATS_ATTR_CONNS, kstats->conns,
2949 IPVS_STATS_ATTR_PAD) ||
2950 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_INPKTS, kstats->inpkts,
2951 IPVS_STATS_ATTR_PAD) ||
2952 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_OUTPKTS, kstats->outpkts,
2953 IPVS_STATS_ATTR_PAD) ||
2954 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_INBYTES, kstats->inbytes,
2955 IPVS_STATS_ATTR_PAD) ||
2956 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_OUTBYTES, kstats->outbytes,
2957 IPVS_STATS_ATTR_PAD) ||
2958 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_CPS, kstats->cps,
2959 IPVS_STATS_ATTR_PAD) ||
2960 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_INPPS, kstats->inpps,
2961 IPVS_STATS_ATTR_PAD) ||
2962 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_OUTPPS, kstats->outpps,
2963 IPVS_STATS_ATTR_PAD) ||
2964 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_INBPS, kstats->inbps,
2965 IPVS_STATS_ATTR_PAD) ||
2966 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_OUTBPS, kstats->outbps,
2967 IPVS_STATS_ATTR_PAD))
969e8e25 2968 goto nla_put_failure;
9a812198
JV		 2969 nla_nest_end(skb, nl_stats);
2970
2971 return 0;
2972
2973nla_put_failure:
9a812198
JV		 2974 nla_nest_cancel(skb, nl_stats);
2975 return -EMSGSIZE;
2976}
2977
2978static int ip_vs_genl_fill_service(struct sk_buff *skb,
2979 struct ip_vs_service *svc)
2980{
ceec4c38 2981 struct ip_vs_scheduler *sched;
371990ee 2982 struct ip_vs_pe *pe;
9a812198
JV		 2983 struct nlattr *nl_service;
2984 struct ip_vs_flags flags = { .flags = svc->flags,
2985 .mask = ~0 };
cd67cd5e 2986 struct ip_vs_kstats kstats;
05f00505 2987 char *sched_name;
9a812198
JV		 2988
2989 nl_service = nla_nest_start(skb, IPVS_CMD_ATTR_SERVICE);
2990 if (!nl_service)
2991 return -EMSGSIZE;
2992
969e8e25
DM		 2993 if (nla_put_u16(skb, IPVS_SVC_ATTR_AF, svc->af))
2994 goto nla_put_failure;
9a812198 2995 if (svc->fwmark) {
969e8e25
DM		 2996 if (nla_put_u32(skb, IPVS_SVC_ATTR_FWMARK, svc->fwmark))
2997 goto nla_put_failure;
9a812198 2998 } else {
969e8e25
DM		 2999 if (nla_put_u16(skb, IPVS_SVC_ATTR_PROTOCOL, svc->protocol) ||
3000 nla_put(skb, IPVS_SVC_ATTR_ADDR, sizeof(svc->addr), &svc->addr) ||
0a925864 3001 nla_put_be16(skb, IPVS_SVC_ATTR_PORT, svc->port))
969e8e25 3002 goto nla_put_failure;
9a812198
JV		 3003 }
3004
ceec4c38 3005 sched = rcu_dereference_protected(svc->scheduler, 1);
05f00505 3006 sched_name = sched ? sched->name : "none";
371990ee 3007 pe = rcu_dereference_protected(svc->pe, 1);
05f00505 3008 if (nla_put_string(skb, IPVS_SVC_ATTR_SCHED_NAME, sched_name) ||
371990ee 3009 (pe && nla_put_string(skb, IPVS_SVC_ATTR_PE_NAME, pe->name)) ||
969e8e25
DM		 3010 nla_put(skb, IPVS_SVC_ATTR_FLAGS, sizeof(flags), &flags) ||
3011 nla_put_u32(skb, IPVS_SVC_ATTR_TIMEOUT, svc->timeout / HZ) ||
0a925864 3012 nla_put_be32(skb, IPVS_SVC_ATTR_NETMASK, svc->netmask))
969e8e25 3013 goto nla_put_failure;
cd67cd5e
JA		 3014 ip_vs_copy_stats(&kstats, &svc->stats);
3015 if (ip_vs_genl_fill_stats(skb, IPVS_SVC_ATTR_STATS, &kstats))
3016 goto nla_put_failure;
3017 if (ip_vs_genl_fill_stats64(skb, IPVS_SVC_ATTR_STATS64, &kstats))
9a812198
JV		 3018 goto nla_put_failure;
3019
3020 nla_nest_end(skb, nl_service);
3021
3022 return 0;
3023
3024nla_put_failure:
3025 nla_nest_cancel(skb, nl_service);
3026 return -EMSGSIZE;
3027}
3028
3029static int ip_vs_genl_dump_service(struct sk_buff *skb,
3030 struct ip_vs_service *svc,
3031 struct netlink_callback *cb)
3032{
3033 void *hdr;
3034
15e47304 3035 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
9a812198
JV		 3036 &ip_vs_genl_family, NLM_F_MULTI,
3037 IPVS_CMD_NEW_SERVICE);
3038 if (!hdr)
3039 return -EMSGSIZE;
3040
3041 if (ip_vs_genl_fill_service(skb, svc) < 0)
3042 goto nla_put_failure;
3043
053c095a
JB		 3044 genlmsg_end(skb, hdr);
3045 return 0;
9a812198
JV		 3046
3047nla_put_failure:
3048 genlmsg_cancel(skb, hdr);
3049 return -EMSGSIZE;
3050}
3051
3052static int ip_vs_genl_dump_services(struct sk_buff *skb,
3053 struct netlink_callback *cb)
3054{
3055 int idx = 0, i;
3056 int start = cb->args[0];
3057 struct ip_vs_service *svc;
9cfdd75b
EB		 3058 struct net *net = sock_net(skb->sk);
3059 struct netns_ipvs *ipvs = net_ipvs(net);
9a812198
JV		 3060
3061 mutex_lock(&__ip_vs_mutex);
3062 for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) {
ceec4c38 3063 hlist_for_each_entry(svc, &ip_vs_svc_table[i], s_list) {
3109d2f2 3064 if (++idx <= start || (svc->ipvs != ipvs))
9a812198
JV		 3065 continue;
3066 if (ip_vs_genl_dump_service(skb, svc, cb) < 0) {
3067 idx--;
3068 goto nla_put_failure;
3069 }
3070 }
3071 }
3072
3073 for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) {
ceec4c38 3074 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[i], f_list) {
3109d2f2 3075 if (++idx <= start || (svc->ipvs != ipvs))
9a812198
JV		 3076 continue;
3077 if (ip_vs_genl_dump_service(skb, svc, cb) < 0) {
3078 idx--;
3079 goto nla_put_failure;
3080 }
3081 }
3082 }
3083
3084nla_put_failure:
3085 mutex_unlock(&__ip_vs_mutex);
3086 cb->args[0] = idx;
3087
3088 return skb->len;
3089}
3090
613fb830 3091static int ip_vs_genl_parse_service(struct netns_ipvs *ipvs,
fc723250 3092 struct ip_vs_service_user_kern *usvc,
26c15cfd
JA		 3093 struct nlattr *nla, int full_entry,
3094 struct ip_vs_service **ret_svc)
9a812198
JV		 3095{
3096 struct nlattr *attrs[IPVS_SVC_ATTR_MAX + 1];
3097 struct nlattr *nla_af, *nla_port, *nla_fwmark, *nla_protocol, *nla_addr;
26c15cfd 3098 struct ip_vs_service *svc;
9a812198
JV		 3099
3100 /* Parse mandatory identifying service fields first */
3101 if (nla == NULL ||
3102 nla_parse_nested(attrs, IPVS_SVC_ATTR_MAX, nla, ip_vs_svc_policy))
3103 return -EINVAL;
3104
3105 nla_af = attrs[IPVS_SVC_ATTR_AF];
3106 nla_protocol = attrs[IPVS_SVC_ATTR_PROTOCOL];
3107 nla_addr = attrs[IPVS_SVC_ATTR_ADDR];
3108 nla_port = attrs[IPVS_SVC_ATTR_PORT];
3109 nla_fwmark = attrs[IPVS_SVC_ATTR_FWMARK];
3110
3111 if (!(nla_af && (nla_fwmark || (nla_port && nla_protocol && nla_addr))))
3112 return -EINVAL;
3113
258c8893
SH		 3114 memset(usvc, 0, sizeof(*usvc));
3115
c860c6b1 3116 usvc->af = nla_get_u16(nla_af);
f94fd041
JV		 3117#ifdef CONFIG_IP_VS_IPV6
3118 if (usvc->af != AF_INET && usvc->af != AF_INET6)
3119#else
3120 if (usvc->af != AF_INET)
3121#endif
9a812198
JV		 3122 return -EAFNOSUPPORT;
3123
3124 if (nla_fwmark) {
3125 usvc->protocol = IPPROTO_TCP;
3126 usvc->fwmark = nla_get_u32(nla_fwmark);
3127 } else {
3128 usvc->protocol = nla_get_u16(nla_protocol);
3129 nla_memcpy(&usvc->addr, nla_addr, sizeof(usvc->addr));
0a925864 3130 usvc->port = nla_get_be16(nla_port);
9a812198
JV		 3131 usvc->fwmark = 0;
3132 }
3133
ceec4c38 3134 rcu_read_lock();
26c15cfd 3135 if (usvc->fwmark)
1ed8b947 3136 svc = __ip_vs_svc_fwm_find(ipvs, usvc->af, usvc->fwmark);
26c15cfd 3137 else
bb2e2a8c 3138 svc = __ip_vs_service_find(ipvs, usvc->af, usvc->protocol,
26c15cfd 3139 &usvc->addr, usvc->port);
ceec4c38 3140 rcu_read_unlock();
26c15cfd
JA		 3141 *ret_svc = svc;
3142
9a812198
JV		 3143 /* If a full entry was requested, check for the additional fields */
3144 if (full_entry) {
0d1e71b0 3145 struct nlattr *nla_sched, *nla_flags, *nla_pe, *nla_timeout,
9a812198
JV		 3146 *nla_netmask;
3147 struct ip_vs_flags flags;
9a812198
JV		 3148
3149 nla_sched = attrs[IPVS_SVC_ATTR_SCHED_NAME];
0d1e71b0 3150 nla_pe = attrs[IPVS_SVC_ATTR_PE_NAME];
9a812198
JV		 3151 nla_flags = attrs[IPVS_SVC_ATTR_FLAGS];
3152 nla_timeout = attrs[IPVS_SVC_ATTR_TIMEOUT];
3153 nla_netmask = attrs[IPVS_SVC_ATTR_NETMASK];
3154
3155 if (!(nla_sched && nla_flags && nla_timeout && nla_netmask))
3156 return -EINVAL;
3157
3158 nla_memcpy(&flags, nla_flags, sizeof(flags));
3159
3160 /* prefill flags from service if it already exists */
26c15cfd 3161 if (svc)
9a812198 3162 usvc->flags = svc->flags;
9a812198
JV		 3163
3164 /* set new flags from userland */
3165 usvc->flags = (usvc->flags & ~flags.mask) |
3166 (flags.flags & flags.mask);
c860c6b1 3167 usvc->sched_name = nla_data(nla_sched);
0d1e71b0 3168 usvc->pe_name = nla_pe ? nla_data(nla_pe) : NULL;
9a812198 3169 usvc->timeout = nla_get_u32(nla_timeout);
0a925864 3170 usvc->netmask = nla_get_be32(nla_netmask);
9a812198
JV		 3171 }
3172
3173 return 0;
3174}
3175
34c2f514 3176static struct ip_vs_service *ip_vs_genl_find_service(struct netns_ipvs *ipvs,
fc723250 3177 struct nlattr *nla)
9a812198 3178{
c860c6b1 3179 struct ip_vs_service_user_kern usvc;
26c15cfd 3180 struct ip_vs_service *svc;
9a812198
JV		 3181 int ret;
3182
613fb830 3183 ret = ip_vs_genl_parse_service(ipvs, &usvc, nla, 0, &svc);
26c15cfd 3184 return ret ? ERR_PTR(ret) : svc;
9a812198
JV		 3185}
3186
3187static int ip_vs_genl_fill_dest(struct sk_buff *skb, struct ip_vs_dest *dest)
3188{
3189 struct nlattr *nl_dest;
cd67cd5e 3190 struct ip_vs_kstats kstats;
9a812198
JV		 3191
3192 nl_dest = nla_nest_start(skb, IPVS_CMD_ATTR_DEST);
3193 if (!nl_dest)
3194 return -EMSGSIZE;
3195
969e8e25 3196 if (nla_put(skb, IPVS_DEST_ATTR_ADDR, sizeof(dest->addr), &dest->addr) ||
0a925864 3197 nla_put_be16(skb, IPVS_DEST_ATTR_PORT, dest->port) ||
969e8e25
DM		 3198 nla_put_u32(skb, IPVS_DEST_ATTR_FWD_METHOD,
3199 (atomic_read(&dest->conn_flags) &
3200 IP_VS_CONN_F_FWD_MASK)) ||
3201 nla_put_u32(skb, IPVS_DEST_ATTR_WEIGHT,
3202 atomic_read(&dest->weight)) ||
3203 nla_put_u32(skb, IPVS_DEST_ATTR_U_THRESH, dest->u_threshold) ||
3204 nla_put_u32(skb, IPVS_DEST_ATTR_L_THRESH, dest->l_threshold) ||
3205 nla_put_u32(skb, IPVS_DEST_ATTR_ACTIVE_CONNS,
3206 atomic_read(&dest->activeconns)) ||
3207 nla_put_u32(skb, IPVS_DEST_ATTR_INACT_CONNS,
3208 atomic_read(&dest->inactconns)) ||
3209 nla_put_u32(skb, IPVS_DEST_ATTR_PERSIST_CONNS,
6cff339b
AG		 3210 atomic_read(&dest->persistconns)) ||
3211 nla_put_u16(skb, IPVS_DEST_ATTR_ADDR_FAMILY, dest->af))
969e8e25 3212 goto nla_put_failure;
cd67cd5e
JA		 3213 ip_vs_copy_stats(&kstats, &dest->stats);
3214 if (ip_vs_genl_fill_stats(skb, IPVS_DEST_ATTR_STATS, &kstats))
3215 goto nla_put_failure;
3216 if (ip_vs_genl_fill_stats64(skb, IPVS_DEST_ATTR_STATS64, &kstats))
9a812198
JV		 3217 goto nla_put_failure;
3218
3219 nla_nest_end(skb, nl_dest);
3220
3221 return 0;
3222
3223nla_put_failure:
3224 nla_nest_cancel(skb, nl_dest);
3225 return -EMSGSIZE;
3226}
3227
3228static int ip_vs_genl_dump_dest(struct sk_buff *skb, struct ip_vs_dest *dest,
3229 struct netlink_callback *cb)
3230{
3231 void *hdr;
3232
15e47304 3233 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
9a812198
JV		 3234 &ip_vs_genl_family, NLM_F_MULTI,
3235 IPVS_CMD_NEW_DEST);
3236 if (!hdr)
3237 return -EMSGSIZE;
3238
3239 if (ip_vs_genl_fill_dest(skb, dest) < 0)
3240 goto nla_put_failure;
3241
053c095a
JB		 3242 genlmsg_end(skb, hdr);
3243 return 0;
9a812198
JV		 3244
3245nla_put_failure:
3246 genlmsg_cancel(skb, hdr);
3247 return -EMSGSIZE;
3248}
3249
3250static int ip_vs_genl_dump_dests(struct sk_buff *skb,
3251 struct netlink_callback *cb)
3252{
3253 int idx = 0;
3254 int start = cb->args[0];
3255 struct ip_vs_service *svc;
3256 struct ip_vs_dest *dest;
3257 struct nlattr *attrs[IPVS_CMD_ATTR_MAX + 1];
9cfdd75b 3258 struct net *net = sock_net(skb->sk);
34c2f514 3259 struct netns_ipvs *ipvs = net_ipvs(net);
9a812198
JV		 3260
3261 mutex_lock(&__ip_vs_mutex);
3262
3263 /* Try to find the service for which to dump destinations */
3264 if (nlmsg_parse(cb->nlh, GENL_HDRLEN, attrs,
3265 IPVS_CMD_ATTR_MAX, ip_vs_cmd_policy))
3266 goto out_err;
3267
a0840e2e 3268
34c2f514 3269 svc = ip_vs_genl_find_service(ipvs, attrs[IPVS_CMD_ATTR_SERVICE]);
ae9442f6 3270 if (IS_ERR_OR_NULL(svc))
9a812198
JV		 3271 goto out_err;
3272
3273 /* Dump the destinations */
3274 list_for_each_entry(dest, &svc->destinations, n_list) {
3275 if (++idx <= start)
3276 continue;
3277 if (ip_vs_genl_dump_dest(skb, dest, cb) < 0) {
3278 idx--;
3279 goto nla_put_failure;
3280 }
3281 }
3282
3283nla_put_failure:
3284 cb->args[0] = idx;
9a812198
JV		 3285
3286out_err:
3287 mutex_unlock(&__ip_vs_mutex);
3288
3289 return skb->len;
3290}
3291
c860c6b1 3292static int ip_vs_genl_parse_dest(struct ip_vs_dest_user_kern *udest,
9a812198
JV		 3293 struct nlattr *nla, int full_entry)
3294{
3295 struct nlattr *attrs[IPVS_DEST_ATTR_MAX + 1];
3296 struct nlattr *nla_addr, *nla_port;
6cff339b 3297 struct nlattr *nla_addr_family;
9a812198
JV		 3298
3299 /* Parse mandatory identifying destination fields first */
3300 if (nla == NULL ||
3301 nla_parse_nested(attrs, IPVS_DEST_ATTR_MAX, nla, ip_vs_dest_policy))
3302 return -EINVAL;
3303
3304 nla_addr = attrs[IPVS_DEST_ATTR_ADDR];
3305 nla_port = attrs[IPVS_DEST_ATTR_PORT];
6cff339b 3306 nla_addr_family = attrs[IPVS_DEST_ATTR_ADDR_FAMILY];
9a812198
JV		 3307
3308 if (!(nla_addr && nla_port))
3309 return -EINVAL;
3310
258c8893
SH		 3311 memset(udest, 0, sizeof(*udest));
3312
9a812198 3313 nla_memcpy(&udest->addr, nla_addr, sizeof(udest->addr));
0a925864 3314 udest->port = nla_get_be16(nla_port);
9a812198 3315
6cff339b
AG		 3316 if (nla_addr_family)
3317 udest->af = nla_get_u16(nla_addr_family);
3318 else
3319 udest->af = 0;
3320
9a812198
JV		 3321 /* If a full entry was requested, check for the additional fields */
3322 if (full_entry) {
3323 struct nlattr *nla_fwd, *nla_weight, *nla_u_thresh,
3324 *nla_l_thresh;
3325
3326 nla_fwd = attrs[IPVS_DEST_ATTR_FWD_METHOD];
3327 nla_weight = attrs[IPVS_DEST_ATTR_WEIGHT];
3328 nla_u_thresh = attrs[IPVS_DEST_ATTR_U_THRESH];
3329 nla_l_thresh = attrs[IPVS_DEST_ATTR_L_THRESH];
3330
3331 if (!(nla_fwd && nla_weight && nla_u_thresh && nla_l_thresh))
3332 return -EINVAL;
3333
3334 udest->conn_flags = nla_get_u32(nla_fwd)
3335 & IP_VS_CONN_F_FWD_MASK;
3336 udest->weight = nla_get_u32(nla_weight);
3337 udest->u_threshold = nla_get_u32(nla_u_thresh);
3338 udest->l_threshold = nla_get_u32(nla_l_thresh);
3339 }
3340
3341 return 0;
3342}
3343
0a925864 3344static int ip_vs_genl_fill_daemon(struct sk_buff *skb, __u32 state,
e4ff6751 3345 struct ipvs_sync_daemon_cfg *c)
9a812198
JV		 3346{
3347 struct nlattr *nl_daemon;
3348
3349 nl_daemon = nla_nest_start(skb, IPVS_CMD_ATTR_DAEMON);
3350 if (!nl_daemon)
3351 return -EMSGSIZE;
3352
969e8e25 3353 if (nla_put_u32(skb, IPVS_DAEMON_ATTR_STATE, state) ||
e4ff6751
JA		 3354 nla_put_string(skb, IPVS_DAEMON_ATTR_MCAST_IFN, c->mcast_ifn) ||
3355 nla_put_u32(skb, IPVS_DAEMON_ATTR_SYNC_ID, c->syncid) ||
d3328817
JA		 3356 nla_put_u16(skb, IPVS_DAEMON_ATTR_SYNC_MAXLEN, c->sync_maxlen) ||
3357 nla_put_u16(skb, IPVS_DAEMON_ATTR_MCAST_PORT, c->mcast_port) ||
3358 nla_put_u8(skb, IPVS_DAEMON_ATTR_MCAST_TTL, c->mcast_ttl))
969e8e25 3359 goto nla_put_failure;
d3328817
JA		 3360#ifdef CONFIG_IP_VS_IPV6
3361 if (c->mcast_af == AF_INET6) {
3362 if (nla_put_in6_addr(skb, IPVS_DAEMON_ATTR_MCAST_GROUP6,
3363 &c->mcast_group.in6))
3364 goto nla_put_failure;
3365 } else
3366#endif
3367 if (c->mcast_af == AF_INET &&
3368 nla_put_in_addr(skb, IPVS_DAEMON_ATTR_MCAST_GROUP,
3369 c->mcast_group.ip))
3370 goto nla_put_failure;
9a812198
JV		 3371 nla_nest_end(skb, nl_daemon);
3372
3373 return 0;
3374
3375nla_put_failure:
3376 nla_nest_cancel(skb, nl_daemon);
3377 return -EMSGSIZE;
3378}
3379
0a925864 3380static int ip_vs_genl_dump_daemon(struct sk_buff *skb, __u32 state,
e4ff6751 3381 struct ipvs_sync_daemon_cfg *c,
9a812198
JV		 3382 struct netlink_callback *cb)
3383{
3384 void *hdr;
15e47304 3385 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
9a812198
JV		 3386 &ip_vs_genl_family, NLM_F_MULTI,
3387 IPVS_CMD_NEW_DAEMON);
3388 if (!hdr)
3389 return -EMSGSIZE;
3390
e4ff6751 3391 if (ip_vs_genl_fill_daemon(skb, state, c))
9a812198
JV		 3392 goto nla_put_failure;
3393
053c095a
JB		 3394 genlmsg_end(skb, hdr);
3395 return 0;
9a812198
JV		 3396
3397nla_put_failure:
3398 genlmsg_cancel(skb, hdr);
3399 return -EMSGSIZE;
3400}
3401
3402static int ip_vs_genl_dump_daemons(struct sk_buff *skb,
3403 struct netlink_callback *cb)
3404{
9cfdd75b 3405 struct net *net = sock_net(skb->sk);
f131315f
HS		 3406 struct netns_ipvs *ipvs = net_ipvs(net);
3407
ae1d48b2 3408 mutex_lock(&ipvs->sync_mutex);
f131315f 3409 if ((ipvs->sync_state & IP_VS_STATE_MASTER) && !cb->args[0]) {
9a812198 3410 if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_MASTER,
e4ff6751 3411 &ipvs->mcfg, cb) < 0)
9a812198
JV		 3412 goto nla_put_failure;
3413
3414 cb->args[0] = 1;
3415 }
3416
f131315f 3417 if ((ipvs->sync_state & IP_VS_STATE_BACKUP) && !cb->args[1]) {
9a812198 3418 if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_BACKUP,
e4ff6751 3419 &ipvs->bcfg, cb) < 0)
9a812198
JV		 3420 goto nla_put_failure;
3421
3422 cb->args[1] = 1;
3423 }
3424
3425nla_put_failure:
ae1d48b2 3426 mutex_unlock(&ipvs->sync_mutex);
9a812198
JV		 3427
3428 return skb->len;
3429}
3430
d8443c5f 3431static int ip_vs_genl_new_daemon(struct netns_ipvs *ipvs, struct nlattr **attrs)
9a812198 3432{
e4ff6751
JA		 3433 struct ipvs_sync_daemon_cfg c;
3434 struct nlattr *a;
e0b26cc9
JA		 3435 int ret;
3436
e4ff6751 3437 memset(&c, 0, sizeof(c));
9a812198
JV		 3438 if (!(attrs[IPVS_DAEMON_ATTR_STATE] &&
3439 attrs[IPVS_DAEMON_ATTR_MCAST_IFN] &&
3440 attrs[IPVS_DAEMON_ATTR_SYNC_ID]))
3441 return -EINVAL;
e4ff6751
JA		 3442 strlcpy(c.mcast_ifn, nla_data(attrs[IPVS_DAEMON_ATTR_MCAST_IFN]),
3443 sizeof(c.mcast_ifn));
3444 c.syncid = nla_get_u32(attrs[IPVS_DAEMON_ATTR_SYNC_ID]);
3445
3446 a = attrs[IPVS_DAEMON_ATTR_SYNC_MAXLEN];
3447 if (a)
3448 c.sync_maxlen = nla_get_u16(a);
9a812198 3449
d3328817
JA		 3450 a = attrs[IPVS_DAEMON_ATTR_MCAST_GROUP];
3451 if (a) {
3452 c.mcast_af = AF_INET;
3453 c.mcast_group.ip = nla_get_in_addr(a);
3454 if (!ipv4_is_multicast(c.mcast_group.ip))
3455 return -EINVAL;
3456 } else {
3457 a = attrs[IPVS_DAEMON_ATTR_MCAST_GROUP6];
3458 if (a) {
3459#ifdef CONFIG_IP_VS_IPV6
3460 int addr_type;
3461
3462 c.mcast_af = AF_INET6;
3463 c.mcast_group.in6 = nla_get_in6_addr(a);
3464 addr_type = ipv6_addr_type(&c.mcast_group.in6);
3465 if (!(addr_type & IPV6_ADDR_MULTICAST))
3466 return -EINVAL;
3467#else
3468 return -EAFNOSUPPORT;
3469#endif
3470 }
3471 }
3472
3473 a = attrs[IPVS_DAEMON_ATTR_MCAST_PORT];
3474 if (a)
3475 c.mcast_port = nla_get_u16(a);
3476
3477 a = attrs[IPVS_DAEMON_ATTR_MCAST_TTL];
3478 if (a)
3479 c.mcast_ttl = nla_get_u8(a);
3480
391f503d
AG		 3481 /* The synchronization protocol is incompatible with mixed family
3482 * services
3483 */
e4ff6751 3484 if (ipvs->mixed_address_family_dests > 0)
391f503d
AG		 3485 return -EINVAL;
3486
e0b26cc9
JA		 3487 rtnl_lock();
3488 mutex_lock(&ipvs->sync_mutex);
6ac121d7 3489 ret = start_sync_thread(ipvs, &c,
e4ff6751 3490 nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]));
e0b26cc9
JA		 3491 mutex_unlock(&ipvs->sync_mutex);
3492 rtnl_unlock();
3493 return ret;
9a812198
JV		 3494}
3495
df04ffb7 3496static int ip_vs_genl_del_daemon(struct netns_ipvs *ipvs, struct nlattr **attrs)
9a812198 3497{
e0b26cc9
JA		 3498 int ret;
3499
9a812198
JV		 3500 if (!attrs[IPVS_DAEMON_ATTR_STATE])
3501 return -EINVAL;
3502
e0b26cc9 3503 mutex_lock(&ipvs->sync_mutex);
b3cf3cbf 3504 ret = stop_sync_thread(ipvs,
e0b26cc9
JA		 3505 nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]));
3506 mutex_unlock(&ipvs->sync_mutex);
3507 return ret;
9a812198
JV		 3508}
3509
cacd1e60 3510static int ip_vs_genl_set_config(struct netns_ipvs *ipvs, struct nlattr **attrs)
9a812198
JV		 3511{
3512 struct ip_vs_timeout_user t;
3513
af540341 3514 __ip_vs_get_timeouts(ipvs, &t);
9a812198
JV		 3515
3516 if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP])
3517 t.tcp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP]);
3518
3519 if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN])
3520 t.tcp_fin_timeout =
3521 nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN]);
3522
3523 if (attrs[IPVS_CMD_ATTR_TIMEOUT_UDP])
3524 t.udp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_UDP]);
3525
f1faa1e7 3526 return ip_vs_set_timeout(ipvs, &t);
9a812198
JV		 3527}
3528
ae1d48b2 3529static int ip_vs_genl_set_daemon(struct sk_buff *skb, struct genl_info *info)
9a812198 3530{
e0b26cc9 3531 int ret = -EINVAL, cmd;
9cfdd75b
EB		 3532 struct net *net = sock_net(skb->sk);
3533 struct netns_ipvs *ipvs = net_ipvs(net);
9a812198
JV		 3534
3535 cmd = info->genlhdr->cmd;
3536
ae1d48b2 3537 if (cmd == IPVS_CMD_NEW_DAEMON || cmd == IPVS_CMD_DEL_DAEMON) {
9a812198
JV		 3538 struct nlattr *daemon_attrs[IPVS_DAEMON_ATTR_MAX + 1];
3539
3540 if (!info->attrs[IPVS_CMD_ATTR_DAEMON] ||
3541 nla_parse_nested(daemon_attrs, IPVS_DAEMON_ATTR_MAX,
3542 info->attrs[IPVS_CMD_ATTR_DAEMON],
e0b26cc9 3543 ip_vs_daemon_policy))
9a812198 3544 goto out;
9a812198
JV		 3545
3546 if (cmd == IPVS_CMD_NEW_DAEMON)
d8443c5f 3547 ret = ip_vs_genl_new_daemon(ipvs, daemon_attrs);
9a812198 3548 else
df04ffb7 3549 ret = ip_vs_genl_del_daemon(ipvs, daemon_attrs);
ae1d48b2 3550 }
e0b26cc9
JA		 3551
3552out:
ae1d48b2
HS		 3553 return ret;
3554}
3555
3556static int ip_vs_genl_set_cmd(struct sk_buff *skb, struct genl_info *info)
3557{
3558 struct ip_vs_service *svc = NULL;
3559 struct ip_vs_service_user_kern usvc;
3560 struct ip_vs_dest_user_kern udest;
3561 int ret = 0, cmd;
3562 int need_full_svc = 0, need_full_dest = 0;
9cfdd75b
EB		 3563 struct net *net = sock_net(skb->sk);
3564 struct netns_ipvs *ipvs = net_ipvs(net);
ae1d48b2 3565
ae1d48b2
HS		 3566 cmd = info->genlhdr->cmd;
3567
3568 mutex_lock(&__ip_vs_mutex);
3569
3570 if (cmd == IPVS_CMD_FLUSH) {
ef7c599d 3571 ret = ip_vs_flush(ipvs, false);
ae1d48b2
HS		 3572 goto out;
3573 } else if (cmd == IPVS_CMD_SET_CONFIG) {
cacd1e60 3574 ret = ip_vs_genl_set_config(ipvs, info->attrs);
9a812198
JV		 3575 goto out;
3576 } else if (cmd == IPVS_CMD_ZERO &&
3577 !info->attrs[IPVS_CMD_ATTR_SERVICE]) {
c60856c6 3578 ret = ip_vs_zero_all(ipvs);
9a812198
JV		 3579 goto out;
3580 }
3581
3582 /* All following commands require a service argument, so check if we
3583 * received a valid one. We need a full service specification when
3584 * adding / editing a service. Only identifying members otherwise. */
3585 if (cmd == IPVS_CMD_NEW_SERVICE || cmd == IPVS_CMD_SET_SERVICE)
3586 need_full_svc = 1;
3587
613fb830 3588 ret = ip_vs_genl_parse_service(ipvs, &usvc,
9a812198 3589 info->attrs[IPVS_CMD_ATTR_SERVICE],
26c15cfd 3590 need_full_svc, &svc);
9a812198
JV		 3591 if (ret)
3592 goto out;
3593
9a812198
JV		 3594 /* Unless we're adding a new service, the service must already exist */
3595 if ((cmd != IPVS_CMD_NEW_SERVICE) && (svc == NULL)) {
3596 ret = -ESRCH;
3597 goto out;
3598 }
3599
3600 /* Destination commands require a valid destination argument. For
3601 * adding / editing a destination, we need a full destination
3602 * specification. */
3603 if (cmd == IPVS_CMD_NEW_DEST || cmd == IPVS_CMD_SET_DEST ||
3604 cmd == IPVS_CMD_DEL_DEST) {
3605 if (cmd != IPVS_CMD_DEL_DEST)
3606 need_full_dest = 1;
3607
3608 ret = ip_vs_genl_parse_dest(&udest,
3609 info->attrs[IPVS_CMD_ATTR_DEST],
3610 need_full_dest);
3611 if (ret)
3612 goto out;
6cff339b
AG		 3613
3614 /* Old protocols did not allow the user to specify address
3615 * family, so we set it to zero instead. We also didn't
3616 * allow heterogeneous pools in the old code, so it's safe
3617 * to assume that this will have the same address family as
3618 * the service.
3619 */
3620 if (udest.af == 0)
3621 udest.af = svc->af;
bc18d37f 3622
dd3733b3 3623 if (udest.af != svc->af && cmd != IPVS_CMD_DEL_DEST) {
bc18d37f
AG		 3624 /* The synchronization protocol is incompatible
3625 * with mixed family services
3626 */
cd58278b 3627 if (ipvs->sync_state) {
bc18d37f
AG		 3628 ret = -EINVAL;
3629 goto out;
3630 }
3631
3632 /* Which connection types do we support? */
3633 switch (udest.conn_flags) {
3634 case IP_VS_CONN_F_TUNNEL:
3635 /* We are able to forward this */
3636 break;
3637 default:
3638 ret = -EINVAL;
3639 goto out;
3640 }
3641 }
9a812198
JV		 3642 }
3643
3644 switch (cmd) {
3645 case IPVS_CMD_NEW_SERVICE:
3646 if (svc == NULL)
5060bd83 3647 ret = ip_vs_add_service(ipvs, &usvc, &svc);
9a812198
JV		 3648 else
3649 ret = -EEXIST;
3650 break;
3651 case IPVS_CMD_SET_SERVICE:
3652 ret = ip_vs_edit_service(svc, &usvc);
3653 break;
3654 case IPVS_CMD_DEL_SERVICE:
3655 ret = ip_vs_del_service(svc);
26c15cfd 3656 /* do not use svc, it can be freed */
9a812198
JV		 3657 break;
3658 case IPVS_CMD_NEW_DEST:
3659 ret = ip_vs_add_dest(svc, &udest);
3660 break;
3661 case IPVS_CMD_SET_DEST:
3662 ret = ip_vs_edit_dest(svc, &udest);
3663 break;
3664 case IPVS_CMD_DEL_DEST:
3665 ret = ip_vs_del_dest(svc, &udest);
3666 break;
3667 case IPVS_CMD_ZERO:
3668 ret = ip_vs_zero_service(svc);
3669 break;
3670 default:
3671 ret = -EINVAL;
3672 }
3673
3674out:
9a812198
JV		 3675 mutex_unlock(&__ip_vs_mutex);
3676
3677 return ret;
3678}
3679
3680static int ip_vs_genl_get_cmd(struct sk_buff *skb, struct genl_info *info)
3681{
3682 struct sk_buff *msg;
3683 void *reply;
3684 int ret, cmd, reply_cmd;
9cfdd75b
EB		 3685 struct net *net = sock_net(skb->sk);
3686 struct netns_ipvs *ipvs = net_ipvs(net);
9a812198
JV		 3687
3688 cmd = info->genlhdr->cmd;
3689
3690 if (cmd == IPVS_CMD_GET_SERVICE)
3691 reply_cmd = IPVS_CMD_NEW_SERVICE;
3692 else if (cmd == IPVS_CMD_GET_INFO)
3693 reply_cmd = IPVS_CMD_SET_INFO;
3694 else if (cmd == IPVS_CMD_GET_CONFIG)
3695 reply_cmd = IPVS_CMD_SET_CONFIG;
3696 else {
1e3e238e 3697 pr_err("unknown Generic Netlink command\n");
9a812198
JV		 3698 return -EINVAL;
3699 }
3700
3701 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3702 if (!msg)
3703 return -ENOMEM;
3704
3705 mutex_lock(&__ip_vs_mutex);
3706
3707 reply = genlmsg_put_reply(msg, info, &ip_vs_genl_family, 0, reply_cmd);
3708 if (reply == NULL)
3709 goto nla_put_failure;
3710
3711 switch (cmd) {
3712 case IPVS_CMD_GET_SERVICE:
3713 {
3714 struct ip_vs_service *svc;
3715
34c2f514 3716 svc = ip_vs_genl_find_service(ipvs,
fc723250 3717 info->attrs[IPVS_CMD_ATTR_SERVICE]);
9a812198
JV		 3718 if (IS_ERR(svc)) {
3719 ret = PTR_ERR(svc);
3720 goto out_err;
3721 } else if (svc) {
3722 ret = ip_vs_genl_fill_service(msg, svc);
9a812198
JV		 3723 if (ret)
3724 goto nla_put_failure;
3725 } else {
3726 ret = -ESRCH;
3727 goto out_err;
3728 }
3729
3730 break;
3731 }
3732
3733 case IPVS_CMD_GET_CONFIG:
3734 {
3735 struct ip_vs_timeout_user t;
3736
af540341 3737 __ip_vs_get_timeouts(ipvs, &t);
9a812198 3738#ifdef CONFIG_IP_VS_PROTO_TCP
969e8e25
DM		 3739 if (nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP,
3740 t.tcp_timeout) ||
3741 nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP_FIN,
3742 t.tcp_fin_timeout))
3743 goto nla_put_failure;
9a812198
JV		 3744#endif
3745#ifdef CONFIG_IP_VS_PROTO_UDP
969e8e25
DM		 3746 if (nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_UDP, t.udp_timeout))
3747 goto nla_put_failure;
9a812198
JV		 3748#endif
3749
3750 break;
3751 }
3752
3753 case IPVS_CMD_GET_INFO:
969e8e25
DM		 3754 if (nla_put_u32(msg, IPVS_INFO_ATTR_VERSION,
3755 IP_VS_VERSION_CODE) ||
3756 nla_put_u32(msg, IPVS_INFO_ATTR_CONN_TAB_SIZE,
3757 ip_vs_conn_tab_size))
3758 goto nla_put_failure;
9a812198
JV		 3759 break;
3760 }
3761
3762 genlmsg_end(msg, reply);
134e6375 3763 ret = genlmsg_reply(msg, info);
9a812198
JV		 3764 goto out;
3765
3766nla_put_failure:
1e3e238e 3767 pr_err("not enough space in Netlink message\n");
9a812198
JV		 3768 ret = -EMSGSIZE;
3769
3770out_err:
3771 nlmsg_free(msg);
3772out:
3773 mutex_unlock(&__ip_vs_mutex);
3774
3775 return ret;
3776}
3777
3778
c61b0c13 3779static const struct genl_ops ip_vs_genl_ops[] = {
9a812198
JV		 3780 {
3781 .cmd = IPVS_CMD_NEW_SERVICE,
3782 .flags = GENL_ADMIN_PERM,
3783 .policy = ip_vs_cmd_policy,
3784 .doit = ip_vs_genl_set_cmd,
3785 },
3786 {
3787 .cmd = IPVS_CMD_SET_SERVICE,
3788 .flags = GENL_ADMIN_PERM,
3789 .policy = ip_vs_cmd_policy,
3790 .doit = ip_vs_genl_set_cmd,
3791 },
3792 {
3793 .cmd = IPVS_CMD_DEL_SERVICE,
3794 .flags = GENL_ADMIN_PERM,
3795 .policy = ip_vs_cmd_policy,
3796 .doit = ip_vs_genl_set_cmd,
3797 },
3798 {
3799 .cmd = IPVS_CMD_GET_SERVICE,
3800 .flags = GENL_ADMIN_PERM,
3801 .doit = ip_vs_genl_get_cmd,
3802 .dumpit = ip_vs_genl_dump_services,
3803 .policy = ip_vs_cmd_policy,
3804 },
3805 {
3806 .cmd = IPVS_CMD_NEW_DEST,
3807 .flags = GENL_ADMIN_PERM,
3808 .policy = ip_vs_cmd_policy,
3809 .doit = ip_vs_genl_set_cmd,
3810 },
3811 {
3812 .cmd = IPVS_CMD_SET_DEST,
3813 .flags = GENL_ADMIN_PERM,
3814 .policy = ip_vs_cmd_policy,
3815 .doit = ip_vs_genl_set_cmd,
3816 },
3817 {
3818 .cmd = IPVS_CMD_DEL_DEST,
3819 .flags = GENL_ADMIN_PERM,
3820 .policy = ip_vs_cmd_policy,
3821 .doit = ip_vs_genl_set_cmd,
3822 },
3823 {
3824 .cmd = IPVS_CMD_GET_DEST,
3825 .flags = GENL_ADMIN_PERM,
3826 .policy = ip_vs_cmd_policy,
3827 .dumpit = ip_vs_genl_dump_dests,
3828 },
3829 {
3830 .cmd = IPVS_CMD_NEW_DAEMON,
3831 .flags = GENL_ADMIN_PERM,
3832 .policy = ip_vs_cmd_policy,
ae1d48b2 3833 .doit = ip_vs_genl_set_daemon,
9a812198
JV		 3834 },
3835 {
3836 .cmd = IPVS_CMD_DEL_DAEMON,
3837 .flags = GENL_ADMIN_PERM,
3838 .policy = ip_vs_cmd_policy,
ae1d48b2 3839 .doit = ip_vs_genl_set_daemon,
9a812198
JV		 3840 },
3841 {
3842 .cmd = IPVS_CMD_GET_DAEMON,
3843 .flags = GENL_ADMIN_PERM,
3844 .dumpit = ip_vs_genl_dump_daemons,
3845 },
3846 {
3847 .cmd = IPVS_CMD_SET_CONFIG,
3848 .flags = GENL_ADMIN_PERM,
3849 .policy = ip_vs_cmd_policy,
3850 .doit = ip_vs_genl_set_cmd,
3851 },
3852 {
3853 .cmd = IPVS_CMD_GET_CONFIG,
3854 .flags = GENL_ADMIN_PERM,
3855 .doit = ip_vs_genl_get_cmd,
3856 },
3857 {
3858 .cmd = IPVS_CMD_GET_INFO,
3859 .flags = GENL_ADMIN_PERM,
3860 .doit = ip_vs_genl_get_cmd,
3861 },
3862 {
3863 .cmd = IPVS_CMD_ZERO,
3864 .flags = GENL_ADMIN_PERM,
3865 .policy = ip_vs_cmd_policy,
3866 .doit = ip_vs_genl_set_cmd,
3867 },
3868 {
3869 .cmd = IPVS_CMD_FLUSH,
3870 .flags = GENL_ADMIN_PERM,
3871 .doit = ip_vs_genl_set_cmd,
3872 },
3873};
3874
3875static int __init ip_vs_genl_register(void)
3876{
8f698d54 3877 return genl_register_family_with_ops(&ip_vs_genl_family,
c53ed742 3878 ip_vs_genl_ops);
9a812198
JV		 3879}
3880
3881static void ip_vs_genl_unregister(void)
3882{
3883 genl_unregister_family(&ip_vs_genl_family);
3884}
3885
3886/* End of Generic Netlink interface definitions */
3887
61b1ab45
HS		 3888/*
3889 * per netns intit/exit func.
3890 */
14e40546 3891#ifdef CONFIG_SYSCTL
8b8237a5 3892static int __net_init ip_vs_control_net_init_sysctl(struct netns_ipvs *ipvs)
61b1ab45 3893{
8b8237a5 3894 struct net *net = ipvs->net;
fc723250 3895 int idx;
a0840e2e 3896 struct ctl_table *tbl;
fc723250 3897
a0840e2e
HS		 3898 atomic_set(&ipvs->dropentry, 0);
3899 spin_lock_init(&ipvs->dropentry_lock);
3900 spin_lock_init(&ipvs->droppacket_lock);
3901 spin_lock_init(&ipvs->securetcp_lock);
a0840e2e
HS		 3902
3903 if (!net_eq(net, &init_net)) {
3904 tbl = kmemdup(vs_vars, sizeof(vs_vars), GFP_KERNEL);
3905 if (tbl == NULL)
14e40546 3906 return -ENOMEM;
464dc801
EB		 3907
3908 /* Don't export sysctls to unprivileged users */
3909 if (net->user_ns != &init_user_ns)
3910 tbl[0].procname = NULL;
a0840e2e
HS		 3911 } else
3912 tbl = vs_vars;
3913 /* Initialize sysctl defaults */
717e917d
EB		 3914 for (idx = 0; idx < ARRAY_SIZE(vs_vars); idx++) {
3915 if (tbl[idx].proc_handler == proc_do_defense_mode)
3916 tbl[idx].extra2 = ipvs;
3917 }
a0840e2e
HS		 3918 idx = 0;
3919 ipvs->sysctl_amemthresh = 1024;
3920 tbl[idx++].data = &ipvs->sysctl_amemthresh;
3921 ipvs->sysctl_am_droprate = 10;
3922 tbl[idx++].data = &ipvs->sysctl_am_droprate;
3923 tbl[idx++].data = &ipvs->sysctl_drop_entry;
3924 tbl[idx++].data = &ipvs->sysctl_drop_packet;
3925#ifdef CONFIG_IP_VS_NFCT
3926 tbl[idx++].data = &ipvs->sysctl_conntrack;
3927#endif
3928 tbl[idx++].data = &ipvs->sysctl_secure_tcp;
3929 ipvs->sysctl_snat_reroute = 1;
3930 tbl[idx++].data = &ipvs->sysctl_snat_reroute;
3931 ipvs->sysctl_sync_ver = 1;
3932 tbl[idx++].data = &ipvs->sysctl_sync_ver;
f73181c8
PNA		 3933 ipvs->sysctl_sync_ports = 1;
3934 tbl[idx++].data = &ipvs->sysctl_sync_ports;
4d0c875d 3935 tbl[idx++].data = &ipvs->sysctl_sync_persist_mode;
1c003b15
PNA		 3936 ipvs->sysctl_sync_qlen_max = nr_free_buffer_pages() / 32;
3937 tbl[idx++].data = &ipvs->sysctl_sync_qlen_max;
3938 ipvs->sysctl_sync_sock_size = 0;
3939 tbl[idx++].data = &ipvs->sysctl_sync_sock_size;
a0840e2e
HS		 3940 tbl[idx++].data = &ipvs->sysctl_cache_bypass;
3941 tbl[idx++].data = &ipvs->sysctl_expire_nodest_conn;
c6c96c18
AF		 3942 tbl[idx++].data = &ipvs->sysctl_sloppy_tcp;
3943 tbl[idx++].data = &ipvs->sysctl_sloppy_sctp;
a0840e2e 3944 tbl[idx++].data = &ipvs->sysctl_expire_quiescent_template;
59e0350e
SH		 3945 ipvs->sysctl_sync_threshold[0] = DEFAULT_SYNC_THRESHOLD;
3946 ipvs->sysctl_sync_threshold[1] = DEFAULT_SYNC_PERIOD;
a0840e2e
HS		 3947 tbl[idx].data = &ipvs->sysctl_sync_threshold;
3948 tbl[idx++].maxlen = sizeof(ipvs->sysctl_sync_threshold);
749c42b6
JA		 3949 ipvs->sysctl_sync_refresh_period = DEFAULT_SYNC_REFRESH_PERIOD;
3950 tbl[idx++].data = &ipvs->sysctl_sync_refresh_period;
3951 ipvs->sysctl_sync_retries = clamp_t(int, DEFAULT_SYNC_RETRIES, 0, 3);
3952 tbl[idx++].data = &ipvs->sysctl_sync_retries;
a0840e2e 3953 tbl[idx++].data = &ipvs->sysctl_nat_icmp_send;
3654e611
JA		 3954 ipvs->sysctl_pmtu_disc = 1;
3955 tbl[idx++].data = &ipvs->sysctl_pmtu_disc;
0c12582f 3956 tbl[idx++].data = &ipvs->sysctl_backup_only;
d752c364
MRL		 3957 ipvs->sysctl_conn_reuse_mode = 1;
3958 tbl[idx++].data = &ipvs->sysctl_conn_reuse_mode;
94485fed 3959 tbl[idx++].data = &ipvs->sysctl_schedule_icmp;
4e478098 3960 tbl[idx++].data = &ipvs->sysctl_ignore_tunneled;
a0840e2e 3961
ec8f23ce 3962 ipvs->sysctl_hdr = register_net_sysctl(net, "net/ipv4/vs", tbl);
0443929f
SH		 3963 if (ipvs->sysctl_hdr == NULL) {
3964 if (!net_eq(net, &init_net))
3965 kfree(tbl);
14e40546 3966 return -ENOMEM;
0443929f 3967 }
0f34d54b 3968 ip_vs_start_estimator(ipvs, &ipvs->tot_stats);
a0840e2e 3969 ipvs->sysctl_tbl = tbl;
f6340ee0
HS		 3970 /* Schedule defense work */
3971 INIT_DELAYED_WORK(&ipvs->defense_work, defense_work_handler);
3972 schedule_delayed_work(&ipvs->defense_work, DEFENSE_TIMER_PERIOD);
61b1ab45 3973
61b1ab45 3974 return 0;
61b1ab45
HS		 3975}
3976
8b8237a5 3977static void __net_exit ip_vs_control_net_cleanup_sysctl(struct netns_ipvs *ipvs)
61b1ab45 3978{
8b8237a5 3979 struct net *net = ipvs->net;
b17fc996 3980
f2431e6e
HS		 3981 cancel_delayed_work_sync(&ipvs->defense_work);
3982 cancel_work_sync(&ipvs->defense_work.work);
a0840e2e 3983 unregister_net_sysctl_table(ipvs->sysctl_hdr);
0f34d54b 3984 ip_vs_stop_estimator(ipvs, &ipvs->tot_stats);
f30bf2a5
TR		 3985
3986 if (!net_eq(net, &init_net))
3987 kfree(ipvs->sysctl_tbl);
14e40546
SH		 3988}
3989
3990#else
3991
8b8237a5
EB		 3992static int __net_init ip_vs_control_net_init_sysctl(struct netns_ipvs *ipvs) { return 0; }
3993static void __net_exit ip_vs_control_net_cleanup_sysctl(struct netns_ipvs *ipvs) { }
14e40546 3994
0443929f 3995#endif
14e40546 3996
7a4f0761
HS		 3997static struct notifier_block ip_vs_dst_notifier = {
3998 .notifier_call = ip_vs_dst_event,
3999};
4000
3d993766 4001int __net_init ip_vs_control_net_init(struct netns_ipvs *ipvs)
14e40546 4002{
827da44c 4003 int i, idx;
14e40546 4004
14e40546
SH		 4005 /* Initialize rs_table */
4006 for (idx = 0; idx < IP_VS_RTAB_SIZE; idx++)
276472ea 4007 INIT_HLIST_HEAD(&ipvs->rs_table[idx]);
14e40546
SH		 4008
4009 INIT_LIST_HEAD(&ipvs->dest_trash);
578bc3ef
JA		 4010 spin_lock_init(&ipvs->dest_trash_lock);
4011 setup_timer(&ipvs->dest_trash_timer, ip_vs_dest_trash_expire,
8e743f1b 4012 (unsigned long) ipvs);
14e40546
SH		 4013 atomic_set(&ipvs->ftpsvc_counter, 0);
4014 atomic_set(&ipvs->nullsvc_counter, 0);
39b97223 4015 atomic_set(&ipvs->conn_out_counter, 0);
14e40546
SH		 4016
4017 /* procfs stats */
4018 ipvs->tot_stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
0a9ee813 4019 if (!ipvs->tot_stats.cpustats)
14e40546 4020 return -ENOMEM;
0a9ee813 4021
827da44c
JS		 4022 for_each_possible_cpu(i) {
4023 struct ip_vs_cpu_stats *ipvs_tot_stats;
4024 ipvs_tot_stats = per_cpu_ptr(ipvs->tot_stats.cpustats, i);
4025 u64_stats_init(&ipvs_tot_stats->syncp);
4026 }
4027
14e40546
SH		 4028 spin_lock_init(&ipvs->tot_stats.lock);
4029
f6ca9f46
AB		 4030 proc_create("ip_vs", 0, ipvs->net->proc_net, &ip_vs_info_fops);
4031 proc_create("ip_vs_stats", 0, ipvs->net->proc_net, &ip_vs_stats_fops);
4032 proc_create("ip_vs_stats_percpu", 0, ipvs->net->proc_net,
d4beaa66 4033 &ip_vs_stats_percpu_fops);
14e40546 4034
8b8237a5 4035 if (ip_vs_control_net_init_sysctl(ipvs))
14e40546
SH		 4036 goto err;
4037
4038 return 0;
4039
4040err:
2a0751af 4041 free_percpu(ipvs->tot_stats.cpustats);
61b1ab45
HS		 4042 return -ENOMEM;
4043}
4044
3d993766 4045void __net_exit ip_vs_control_net_cleanup(struct netns_ipvs *ipvs)
61b1ab45 4046{
6c0e14f5 4047 ip_vs_trash_cleanup(ipvs);
8b8237a5 4048 ip_vs_control_net_cleanup_sysctl(ipvs);
f6ca9f46
AB		 4049 remove_proc_entry("ip_vs_stats_percpu", ipvs->net->proc_net);
4050 remove_proc_entry("ip_vs_stats", ipvs->net->proc_net);
4051 remove_proc_entry("ip_vs", ipvs->net->proc_net);
2a0751af 4052 free_percpu(ipvs->tot_stats.cpustats);
61b1ab45
HS		 4053}
4054
8537de8a 4055int __init ip_vs_register_nl_ioctl(void)
1da177e4 4056{
fc723250 4057 int ret;
1da177e4 4058
1da177e4
LT		 4059 ret = nf_register_sockopt(&ip_vs_sockopts);
4060 if (ret) {
1e3e238e 4061 pr_err("cannot register sockopt.\n");
7a4f0761 4062 goto err_sock;
1da177e4
LT		 4063 }
4064
9a812198
JV		 4065 ret = ip_vs_genl_register();
4066 if (ret) {
1e3e238e 4067 pr_err("cannot register Generic Netlink interface.\n");
7a4f0761 4068 goto err_genl;
9a812198 4069 }
1da177e4 4070 return 0;
fc723250 4071
7a4f0761
HS		 4072err_genl:
4073 nf_unregister_sockopt(&ip_vs_sockopts);
4074err_sock:
fc723250 4075 return ret;
1da177e4
LT		 4076}
4077
8537de8a
HS		 4078void ip_vs_unregister_nl_ioctl(void)
4079{
4080 ip_vs_genl_unregister();
4081 nf_unregister_sockopt(&ip_vs_sockopts);
4082}
4083
4084int __init ip_vs_control_init(void)
4085{
4086 int idx;
4087 int ret;
4088
4089 EnterFunction(2);
4090
276472ea 4091 /* Initialize svc_table, ip_vs_svc_fwm_table */
8537de8a 4092 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38
JA		 4093 INIT_HLIST_HEAD(&ip_vs_svc_table[idx]);
4094 INIT_HLIST_HEAD(&ip_vs_svc_fwm_table[idx]);
8537de8a
HS		 4095 }
4096
4097 smp_wmb(); /* Do we really need it now ? */
4098
4099 ret = register_netdevice_notifier(&ip_vs_dst_notifier);
4100 if (ret < 0)
4101 return ret;
4102
4103 LeaveFunction(2);
4104 return 0;
4105}
4106
1da177e4
LT		 4107
4108void ip_vs_control_cleanup(void)
4109{
4110 EnterFunction(2);
7676e345 4111 unregister_netdevice_notifier(&ip_vs_dst_notifier);
1da177e4
LT		 4112 LeaveFunction(2);
4113}
Linux kernel - Deliverables
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