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ipvs: extend connection flags to 32 bits
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / netfilter / ipvs / ip_vs_ctl.c
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 *
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
21 #define KMSG_COMPONENT "IPVS"
22 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
23
24 #include <linux/module.h>
25 #include <linux/init.h>
26 #include <linux/types.h>
27 #include <linux/capability.h>
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>
33 #include <linux/seq_file.h>
34 #include <linux/slab.h>
35
36 #include <linux/netfilter.h>
37 #include <linux/netfilter_ipv4.h>
38 #include <linux/mutex.h>
39
40 #include <net/net_namespace.h>
41 #include <net/ip.h>
42 #ifdef CONFIG_IP_VS_IPV6
43 #include <net/ipv6.h>
44 #include <net/ip6_route.h>
45 #endif
46 #include <net/route.h>
47 #include <net/sock.h>
48 #include <net/genetlink.h>
49
50 #include <asm/uaccess.h>
51
52 #include <net/ip_vs.h>
53
54 /* semaphore for IPVS sockopts. And, [gs]etsockopt may sleep. */
55 static DEFINE_MUTEX(__ip_vs_mutex);
56
57 /* lock for service table */
58 static DEFINE_RWLOCK(__ip_vs_svc_lock);
59
60 /* lock for table with the real services */
61 static DEFINE_RWLOCK(__ip_vs_rs_lock);
62
63 /* lock for state and timeout tables */
64 static DEFINE_SPINLOCK(ip_vs_securetcp_lock);
65
66 /* lock for drop entry handling */
67 static DEFINE_SPINLOCK(__ip_vs_dropentry_lock);
68
69 /* lock for drop packet handling */
70 static DEFINE_SPINLOCK(__ip_vs_droppacket_lock);
71
72 /* 1/rate drop and drop-entry variables */
73 int ip_vs_drop_rate = 0;
74 int ip_vs_drop_counter = 0;
75 static atomic_t ip_vs_dropentry = ATOMIC_INIT(0);
76
77 /* number of virtual services */
78 static int ip_vs_num_services = 0;
79
80 /* sysctl variables */
81 static int sysctl_ip_vs_drop_entry = 0;
82 static int sysctl_ip_vs_drop_packet = 0;
83 static int sysctl_ip_vs_secure_tcp = 0;
84 static int sysctl_ip_vs_amemthresh = 1024;
85 static int sysctl_ip_vs_am_droprate = 10;
86 int sysctl_ip_vs_cache_bypass = 0;
87 int sysctl_ip_vs_expire_nodest_conn = 0;
88 int sysctl_ip_vs_expire_quiescent_template = 0;
89 int sysctl_ip_vs_sync_threshold[2] = { 3, 50 };
90 int sysctl_ip_vs_nat_icmp_send = 0;
91
92
93 #ifdef CONFIG_IP_VS_DEBUG
94 static int sysctl_ip_vs_debug_level = 0;
95
96 int ip_vs_get_debug_level(void)
97 {
98 return sysctl_ip_vs_debug_level;
99 }
100 #endif
101
102 #ifdef CONFIG_IP_VS_IPV6
103 /* Taken from rt6_fill_node() in net/ipv6/route.c, is there a better way? */
104 static int __ip_vs_addr_is_local_v6(const struct in6_addr *addr)
105 {
106 struct rt6_info *rt;
107 struct flowi fl = {
108 .oif = 0,
109 .nl_u = {
110 .ip6_u = {
111 .daddr = *addr,
112 .saddr = { .s6_addr32 = {0, 0, 0, 0} }, } },
113 };
114
115 rt = (struct rt6_info *)ip6_route_output(&init_net, NULL, &fl);
116 if (rt && rt->rt6i_dev && (rt->rt6i_dev->flags & IFF_LOOPBACK))
117 return 1;
118
119 return 0;
120 }
121 #endif
122 /*
123 * update_defense_level is called from keventd and from sysctl,
124 * so it needs to protect itself from softirqs
125 */
126 static void update_defense_level(void)
127 {
128 struct sysinfo i;
129 static int old_secure_tcp = 0;
130 int availmem;
131 int nomem;
132 int to_change = -1;
133
134 /* we only count free and buffered memory (in pages) */
135 si_meminfo(&i);
136 availmem = i.freeram + i.bufferram;
137 /* however in linux 2.5 the i.bufferram is total page cache size,
138 we need adjust it */
139 /* si_swapinfo(&i); */
140 /* availmem = availmem - (i.totalswap - i.freeswap); */
141
142 nomem = (availmem < sysctl_ip_vs_amemthresh);
143
144 local_bh_disable();
145
146 /* drop_entry */
147 spin_lock(&__ip_vs_dropentry_lock);
148 switch (sysctl_ip_vs_drop_entry) {
149 case 0:
150 atomic_set(&ip_vs_dropentry, 0);
151 break;
152 case 1:
153 if (nomem) {
154 atomic_set(&ip_vs_dropentry, 1);
155 sysctl_ip_vs_drop_entry = 2;
156 } else {
157 atomic_set(&ip_vs_dropentry, 0);
158 }
159 break;
160 case 2:
161 if (nomem) {
162 atomic_set(&ip_vs_dropentry, 1);
163 } else {
164 atomic_set(&ip_vs_dropentry, 0);
165 sysctl_ip_vs_drop_entry = 1;
166 };
167 break;
168 case 3:
169 atomic_set(&ip_vs_dropentry, 1);
170 break;
171 }
172 spin_unlock(&__ip_vs_dropentry_lock);
173
174 /* drop_packet */
175 spin_lock(&__ip_vs_droppacket_lock);
176 switch (sysctl_ip_vs_drop_packet) {
177 case 0:
178 ip_vs_drop_rate = 0;
179 break;
180 case 1:
181 if (nomem) {
182 ip_vs_drop_rate = ip_vs_drop_counter
183 = sysctl_ip_vs_amemthresh /
184 (sysctl_ip_vs_amemthresh-availmem);
185 sysctl_ip_vs_drop_packet = 2;
186 } else {
187 ip_vs_drop_rate = 0;
188 }
189 break;
190 case 2:
191 if (nomem) {
192 ip_vs_drop_rate = ip_vs_drop_counter
193 = sysctl_ip_vs_amemthresh /
194 (sysctl_ip_vs_amemthresh-availmem);
195 } else {
196 ip_vs_drop_rate = 0;
197 sysctl_ip_vs_drop_packet = 1;
198 }
199 break;
200 case 3:
201 ip_vs_drop_rate = sysctl_ip_vs_am_droprate;
202 break;
203 }
204 spin_unlock(&__ip_vs_droppacket_lock);
205
206 /* secure_tcp */
207 spin_lock(&ip_vs_securetcp_lock);
208 switch (sysctl_ip_vs_secure_tcp) {
209 case 0:
210 if (old_secure_tcp >= 2)
211 to_change = 0;
212 break;
213 case 1:
214 if (nomem) {
215 if (old_secure_tcp < 2)
216 to_change = 1;
217 sysctl_ip_vs_secure_tcp = 2;
218 } else {
219 if (old_secure_tcp >= 2)
220 to_change = 0;
221 }
222 break;
223 case 2:
224 if (nomem) {
225 if (old_secure_tcp < 2)
226 to_change = 1;
227 } else {
228 if (old_secure_tcp >= 2)
229 to_change = 0;
230 sysctl_ip_vs_secure_tcp = 1;
231 }
232 break;
233 case 3:
234 if (old_secure_tcp < 2)
235 to_change = 1;
236 break;
237 }
238 old_secure_tcp = sysctl_ip_vs_secure_tcp;
239 if (to_change >= 0)
240 ip_vs_protocol_timeout_change(sysctl_ip_vs_secure_tcp>1);
241 spin_unlock(&ip_vs_securetcp_lock);
242
243 local_bh_enable();
244 }
245
246
247 /*
248 * Timer for checking the defense
249 */
250 #define DEFENSE_TIMER_PERIOD 1*HZ
251 static void defense_work_handler(struct work_struct *work);
252 static DECLARE_DELAYED_WORK(defense_work, defense_work_handler);
253
254 static void defense_work_handler(struct work_struct *work)
255 {
256 update_defense_level();
257 if (atomic_read(&ip_vs_dropentry))
258 ip_vs_random_dropentry();
259
260 schedule_delayed_work(&defense_work, DEFENSE_TIMER_PERIOD);
261 }
262
263 int
264 ip_vs_use_count_inc(void)
265 {
266 return try_module_get(THIS_MODULE);
267 }
268
269 void
270 ip_vs_use_count_dec(void)
271 {
272 module_put(THIS_MODULE);
273 }
274
275
276 /*
277 * Hash table: for virtual service lookups
278 */
279 #define IP_VS_SVC_TAB_BITS 8
280 #define IP_VS_SVC_TAB_SIZE (1 << IP_VS_SVC_TAB_BITS)
281 #define IP_VS_SVC_TAB_MASK (IP_VS_SVC_TAB_SIZE - 1)
282
283 /* the service table hashed by <protocol, addr, port> */
284 static struct list_head ip_vs_svc_table[IP_VS_SVC_TAB_SIZE];
285 /* the service table hashed by fwmark */
286 static struct list_head ip_vs_svc_fwm_table[IP_VS_SVC_TAB_SIZE];
287
288 /*
289 * Hash table: for real service lookups
290 */
291 #define IP_VS_RTAB_BITS 4
292 #define IP_VS_RTAB_SIZE (1 << IP_VS_RTAB_BITS)
293 #define IP_VS_RTAB_MASK (IP_VS_RTAB_SIZE - 1)
294
295 static struct list_head ip_vs_rtable[IP_VS_RTAB_SIZE];
296
297 /*
298 * Trash for destinations
299 */
300 static LIST_HEAD(ip_vs_dest_trash);
301
302 /*
303 * FTP & NULL virtual service counters
304 */
305 static atomic_t ip_vs_ftpsvc_counter = ATOMIC_INIT(0);
306 static atomic_t ip_vs_nullsvc_counter = ATOMIC_INIT(0);
307
308
309 /*
310 * Returns hash value for virtual service
311 */
312 static __inline__ unsigned
313 ip_vs_svc_hashkey(int af, unsigned proto, const union nf_inet_addr *addr,
314 __be16 port)
315 {
316 register unsigned porth = ntohs(port);
317 __be32 addr_fold = addr->ip;
318
319 #ifdef CONFIG_IP_VS_IPV6
320 if (af == AF_INET6)
321 addr_fold = addr->ip6[0]^addr->ip6[1]^
322 addr->ip6[2]^addr->ip6[3];
323 #endif
324
325 return (proto^ntohl(addr_fold)^(porth>>IP_VS_SVC_TAB_BITS)^porth)
326 & IP_VS_SVC_TAB_MASK;
327 }
328
329 /*
330 * Returns hash value of fwmark for virtual service lookup
331 */
332 static __inline__ unsigned ip_vs_svc_fwm_hashkey(__u32 fwmark)
333 {
334 return fwmark & IP_VS_SVC_TAB_MASK;
335 }
336
337 /*
338 * Hashes a service in the ip_vs_svc_table by <proto,addr,port>
339 * or in the ip_vs_svc_fwm_table by fwmark.
340 * Should be called with locked tables.
341 */
342 static int ip_vs_svc_hash(struct ip_vs_service *svc)
343 {
344 unsigned hash;
345
346 if (svc->flags & IP_VS_SVC_F_HASHED) {
347 pr_err("%s(): request for already hashed, called from %pF\n",
348 __func__, __builtin_return_address(0));
349 return 0;
350 }
351
352 if (svc->fwmark == 0) {
353 /*
354 * Hash it by <protocol,addr,port> in ip_vs_svc_table
355 */
356 hash = ip_vs_svc_hashkey(svc->af, svc->protocol, &svc->addr,
357 svc->port);
358 list_add(&svc->s_list, &ip_vs_svc_table[hash]);
359 } else {
360 /*
361 * Hash it by fwmark in ip_vs_svc_fwm_table
362 */
363 hash = ip_vs_svc_fwm_hashkey(svc->fwmark);
364 list_add(&svc->f_list, &ip_vs_svc_fwm_table[hash]);
365 }
366
367 svc->flags |= IP_VS_SVC_F_HASHED;
368 /* increase its refcnt because it is referenced by the svc table */
369 atomic_inc(&svc->refcnt);
370 return 1;
371 }
372
373
374 /*
375 * Unhashes a service from ip_vs_svc_table/ip_vs_svc_fwm_table.
376 * Should be called with locked tables.
377 */
378 static int ip_vs_svc_unhash(struct ip_vs_service *svc)
379 {
380 if (!(svc->flags & IP_VS_SVC_F_HASHED)) {
381 pr_err("%s(): request for unhash flagged, called from %pF\n",
382 __func__, __builtin_return_address(0));
383 return 0;
384 }
385
386 if (svc->fwmark == 0) {
387 /* Remove it from the ip_vs_svc_table table */
388 list_del(&svc->s_list);
389 } else {
390 /* Remove it from the ip_vs_svc_fwm_table table */
391 list_del(&svc->f_list);
392 }
393
394 svc->flags &= ~IP_VS_SVC_F_HASHED;
395 atomic_dec(&svc->refcnt);
396 return 1;
397 }
398
399
400 /*
401 * Get service by {proto,addr,port} in the service table.
402 */
403 static inline struct ip_vs_service *
404 __ip_vs_service_get(int af, __u16 protocol, const union nf_inet_addr *vaddr,
405 __be16 vport)
406 {
407 unsigned hash;
408 struct ip_vs_service *svc;
409
410 /* Check for "full" addressed entries */
411 hash = ip_vs_svc_hashkey(af, protocol, vaddr, vport);
412
413 list_for_each_entry(svc, &ip_vs_svc_table[hash], s_list){
414 if ((svc->af == af)
415 && ip_vs_addr_equal(af, &svc->addr, vaddr)
416 && (svc->port == vport)
417 && (svc->protocol == protocol)) {
418 /* HIT */
419 atomic_inc(&svc->usecnt);
420 return svc;
421 }
422 }
423
424 return NULL;
425 }
426
427
428 /*
429 * Get service by {fwmark} in the service table.
430 */
431 static inline struct ip_vs_service *
432 __ip_vs_svc_fwm_get(int af, __u32 fwmark)
433 {
434 unsigned hash;
435 struct ip_vs_service *svc;
436
437 /* Check for fwmark addressed entries */
438 hash = ip_vs_svc_fwm_hashkey(fwmark);
439
440 list_for_each_entry(svc, &ip_vs_svc_fwm_table[hash], f_list) {
441 if (svc->fwmark == fwmark && svc->af == af) {
442 /* HIT */
443 atomic_inc(&svc->usecnt);
444 return svc;
445 }
446 }
447
448 return NULL;
449 }
450
451 struct ip_vs_service *
452 ip_vs_service_get(int af, __u32 fwmark, __u16 protocol,
453 const union nf_inet_addr *vaddr, __be16 vport)
454 {
455 struct ip_vs_service *svc;
456
457 read_lock(&__ip_vs_svc_lock);
458
459 /*
460 * Check the table hashed by fwmark first
461 */
462 if (fwmark && (svc = __ip_vs_svc_fwm_get(af, fwmark)))
463 goto out;
464
465 /*
466 * Check the table hashed by <protocol,addr,port>
467 * for "full" addressed entries
468 */
469 svc = __ip_vs_service_get(af, protocol, vaddr, vport);
470
471 if (svc == NULL
472 && protocol == IPPROTO_TCP
473 && atomic_read(&ip_vs_ftpsvc_counter)
474 && (vport == FTPDATA || ntohs(vport) >= PROT_SOCK)) {
475 /*
476 * Check if ftp service entry exists, the packet
477 * might belong to FTP data connections.
478 */
479 svc = __ip_vs_service_get(af, protocol, vaddr, FTPPORT);
480 }
481
482 if (svc == NULL
483 && atomic_read(&ip_vs_nullsvc_counter)) {
484 /*
485 * Check if the catch-all port (port zero) exists
486 */
487 svc = __ip_vs_service_get(af, protocol, vaddr, 0);
488 }
489
490 out:
491 read_unlock(&__ip_vs_svc_lock);
492
493 IP_VS_DBG_BUF(9, "lookup service: fwm %u %s %s:%u %s\n",
494 fwmark, ip_vs_proto_name(protocol),
495 IP_VS_DBG_ADDR(af, vaddr), ntohs(vport),
496 svc ? "hit" : "not hit");
497
498 return svc;
499 }
500
501
502 static inline void
503 __ip_vs_bind_svc(struct ip_vs_dest *dest, struct ip_vs_service *svc)
504 {
505 atomic_inc(&svc->refcnt);
506 dest->svc = svc;
507 }
508
509 static inline void
510 __ip_vs_unbind_svc(struct ip_vs_dest *dest)
511 {
512 struct ip_vs_service *svc = dest->svc;
513
514 dest->svc = NULL;
515 if (atomic_dec_and_test(&svc->refcnt))
516 kfree(svc);
517 }
518
519
520 /*
521 * Returns hash value for real service
522 */
523 static inline unsigned ip_vs_rs_hashkey(int af,
524 const union nf_inet_addr *addr,
525 __be16 port)
526 {
527 register unsigned porth = ntohs(port);
528 __be32 addr_fold = addr->ip;
529
530 #ifdef CONFIG_IP_VS_IPV6
531 if (af == AF_INET6)
532 addr_fold = addr->ip6[0]^addr->ip6[1]^
533 addr->ip6[2]^addr->ip6[3];
534 #endif
535
536 return (ntohl(addr_fold)^(porth>>IP_VS_RTAB_BITS)^porth)
537 & IP_VS_RTAB_MASK;
538 }
539
540 /*
541 * Hashes ip_vs_dest in ip_vs_rtable by <proto,addr,port>.
542 * should be called with locked tables.
543 */
544 static int ip_vs_rs_hash(struct ip_vs_dest *dest)
545 {
546 unsigned hash;
547
548 if (!list_empty(&dest->d_list)) {
549 return 0;
550 }
551
552 /*
553 * Hash by proto,addr,port,
554 * which are the parameters of the real service.
555 */
556 hash = ip_vs_rs_hashkey(dest->af, &dest->addr, dest->port);
557
558 list_add(&dest->d_list, &ip_vs_rtable[hash]);
559
560 return 1;
561 }
562
563 /*
564 * UNhashes ip_vs_dest from ip_vs_rtable.
565 * should be called with locked tables.
566 */
567 static int ip_vs_rs_unhash(struct ip_vs_dest *dest)
568 {
569 /*
570 * Remove it from the ip_vs_rtable table.
571 */
572 if (!list_empty(&dest->d_list)) {
573 list_del(&dest->d_list);
574 INIT_LIST_HEAD(&dest->d_list);
575 }
576
577 return 1;
578 }
579
580 /*
581 * Lookup real service by <proto,addr,port> in the real service table.
582 */
583 struct ip_vs_dest *
584 ip_vs_lookup_real_service(int af, __u16 protocol,
585 const union nf_inet_addr *daddr,
586 __be16 dport)
587 {
588 unsigned hash;
589 struct ip_vs_dest *dest;
590
591 /*
592 * Check for "full" addressed entries
593 * Return the first found entry
594 */
595 hash = ip_vs_rs_hashkey(af, daddr, dport);
596
597 read_lock(&__ip_vs_rs_lock);
598 list_for_each_entry(dest, &ip_vs_rtable[hash], d_list) {
599 if ((dest->af == af)
600 && ip_vs_addr_equal(af, &dest->addr, daddr)
601 && (dest->port == dport)
602 && ((dest->protocol == protocol) ||
603 dest->vfwmark)) {
604 /* HIT */
605 read_unlock(&__ip_vs_rs_lock);
606 return dest;
607 }
608 }
609 read_unlock(&__ip_vs_rs_lock);
610
611 return NULL;
612 }
613
614 /*
615 * Lookup destination by {addr,port} in the given service
616 */
617 static struct ip_vs_dest *
618 ip_vs_lookup_dest(struct ip_vs_service *svc, const union nf_inet_addr *daddr,
619 __be16 dport)
620 {
621 struct ip_vs_dest *dest;
622
623 /*
624 * Find the destination for the given service
625 */
626 list_for_each_entry(dest, &svc->destinations, n_list) {
627 if ((dest->af == svc->af)
628 && ip_vs_addr_equal(svc->af, &dest->addr, daddr)
629 && (dest->port == dport)) {
630 /* HIT */
631 return dest;
632 }
633 }
634
635 return NULL;
636 }
637
638 /*
639 * Find destination by {daddr,dport,vaddr,protocol}
640 * Cretaed to be used in ip_vs_process_message() in
641 * the backup synchronization daemon. It finds the
642 * destination to be bound to the received connection
643 * on the backup.
644 *
645 * ip_vs_lookup_real_service() looked promissing, but
646 * seems not working as expected.
647 */
648 struct ip_vs_dest *ip_vs_find_dest(int af, const union nf_inet_addr *daddr,
649 __be16 dport,
650 const union nf_inet_addr *vaddr,
651 __be16 vport, __u16 protocol)
652 {
653 struct ip_vs_dest *dest;
654 struct ip_vs_service *svc;
655
656 svc = ip_vs_service_get(af, 0, protocol, vaddr, vport);
657 if (!svc)
658 return NULL;
659 dest = ip_vs_lookup_dest(svc, daddr, dport);
660 if (dest)
661 atomic_inc(&dest->refcnt);
662 ip_vs_service_put(svc);
663 return dest;
664 }
665
666 /*
667 * Lookup dest by {svc,addr,port} in the destination trash.
668 * The destination trash is used to hold the destinations that are removed
669 * from the service table but are still referenced by some conn entries.
670 * The reason to add the destination trash is when the dest is temporary
671 * down (either by administrator or by monitor program), the dest can be
672 * picked back from the trash, the remaining connections to the dest can
673 * continue, and the counting information of the dest is also useful for
674 * scheduling.
675 */
676 static struct ip_vs_dest *
677 ip_vs_trash_get_dest(struct ip_vs_service *svc, const union nf_inet_addr *daddr,
678 __be16 dport)
679 {
680 struct ip_vs_dest *dest, *nxt;
681
682 /*
683 * Find the destination in trash
684 */
685 list_for_each_entry_safe(dest, nxt, &ip_vs_dest_trash, n_list) {
686 IP_VS_DBG_BUF(3, "Destination %u/%s:%u still in trash, "
687 "dest->refcnt=%d\n",
688 dest->vfwmark,
689 IP_VS_DBG_ADDR(svc->af, &dest->addr),
690 ntohs(dest->port),
691 atomic_read(&dest->refcnt));
692 if (dest->af == svc->af &&
693 ip_vs_addr_equal(svc->af, &dest->addr, daddr) &&
694 dest->port == dport &&
695 dest->vfwmark == svc->fwmark &&
696 dest->protocol == svc->protocol &&
697 (svc->fwmark ||
698 (ip_vs_addr_equal(svc->af, &dest->vaddr, &svc->addr) &&
699 dest->vport == svc->port))) {
700 /* HIT */
701 return dest;
702 }
703
704 /*
705 * Try to purge the destination from trash if not referenced
706 */
707 if (atomic_read(&dest->refcnt) == 1) {
708 IP_VS_DBG_BUF(3, "Removing destination %u/%s:%u "
709 "from trash\n",
710 dest->vfwmark,
711 IP_VS_DBG_ADDR(svc->af, &dest->addr),
712 ntohs(dest->port));
713 list_del(&dest->n_list);
714 ip_vs_dst_reset(dest);
715 __ip_vs_unbind_svc(dest);
716 kfree(dest);
717 }
718 }
719
720 return NULL;
721 }
722
723
724 /*
725 * Clean up all the destinations in the trash
726 * Called by the ip_vs_control_cleanup()
727 *
728 * When the ip_vs_control_clearup is activated by ipvs module exit,
729 * the service tables must have been flushed and all the connections
730 * are expired, and the refcnt of each destination in the trash must
731 * be 1, so we simply release them here.
732 */
733 static void ip_vs_trash_cleanup(void)
734 {
735 struct ip_vs_dest *dest, *nxt;
736
737 list_for_each_entry_safe(dest, nxt, &ip_vs_dest_trash, n_list) {
738 list_del(&dest->n_list);
739 ip_vs_dst_reset(dest);
740 __ip_vs_unbind_svc(dest);
741 kfree(dest);
742 }
743 }
744
745
746 static void
747 ip_vs_zero_stats(struct ip_vs_stats *stats)
748 {
749 spin_lock_bh(&stats->lock);
750
751 memset(&stats->ustats, 0, sizeof(stats->ustats));
752 ip_vs_zero_estimator(stats);
753
754 spin_unlock_bh(&stats->lock);
755 }
756
757 /*
758 * Update a destination in the given service
759 */
760 static void
761 __ip_vs_update_dest(struct ip_vs_service *svc,
762 struct ip_vs_dest *dest, struct ip_vs_dest_user_kern *udest)
763 {
764 int conn_flags;
765
766 /* set the weight and the flags */
767 atomic_set(&dest->weight, udest->weight);
768 conn_flags = udest->conn_flags & IP_VS_CONN_F_DEST_MASK;
769 conn_flags |= IP_VS_CONN_F_INACTIVE;
770
771 /* check if local node and update the flags */
772 #ifdef CONFIG_IP_VS_IPV6
773 if (svc->af == AF_INET6) {
774 if (__ip_vs_addr_is_local_v6(&udest->addr.in6)) {
775 conn_flags = (conn_flags & ~IP_VS_CONN_F_FWD_MASK)
776 | IP_VS_CONN_F_LOCALNODE;
777 }
778 } else
779 #endif
780 if (inet_addr_type(&init_net, udest->addr.ip) == RTN_LOCAL) {
781 conn_flags = (conn_flags & ~IP_VS_CONN_F_FWD_MASK)
782 | IP_VS_CONN_F_LOCALNODE;
783 }
784
785 /* set the IP_VS_CONN_F_NOOUTPUT flag if not masquerading/NAT */
786 if ((conn_flags & IP_VS_CONN_F_FWD_MASK) != IP_VS_CONN_F_MASQ) {
787 conn_flags |= IP_VS_CONN_F_NOOUTPUT;
788 } else {
789 /*
790 * Put the real service in ip_vs_rtable if not present.
791 * For now only for NAT!
792 */
793 write_lock_bh(&__ip_vs_rs_lock);
794 ip_vs_rs_hash(dest);
795 write_unlock_bh(&__ip_vs_rs_lock);
796 }
797 atomic_set(&dest->conn_flags, conn_flags);
798
799 /* bind the service */
800 if (!dest->svc) {
801 __ip_vs_bind_svc(dest, svc);
802 } else {
803 if (dest->svc != svc) {
804 __ip_vs_unbind_svc(dest);
805 ip_vs_zero_stats(&dest->stats);
806 __ip_vs_bind_svc(dest, svc);
807 }
808 }
809
810 /* set the dest status flags */
811 dest->flags |= IP_VS_DEST_F_AVAILABLE;
812
813 if (udest->u_threshold == 0 || udest->u_threshold > dest->u_threshold)
814 dest->flags &= ~IP_VS_DEST_F_OVERLOAD;
815 dest->u_threshold = udest->u_threshold;
816 dest->l_threshold = udest->l_threshold;
817 }
818
819
820 /*
821 * Create a destination for the given service
822 */
823 static int
824 ip_vs_new_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest,
825 struct ip_vs_dest **dest_p)
826 {
827 struct ip_vs_dest *dest;
828 unsigned atype;
829
830 EnterFunction(2);
831
832 #ifdef CONFIG_IP_VS_IPV6
833 if (svc->af == AF_INET6) {
834 atype = ipv6_addr_type(&udest->addr.in6);
835 if ((!(atype & IPV6_ADDR_UNICAST) ||
836 atype & IPV6_ADDR_LINKLOCAL) &&
837 !__ip_vs_addr_is_local_v6(&udest->addr.in6))
838 return -EINVAL;
839 } else
840 #endif
841 {
842 atype = inet_addr_type(&init_net, udest->addr.ip);
843 if (atype != RTN_LOCAL && atype != RTN_UNICAST)
844 return -EINVAL;
845 }
846
847 dest = kzalloc(sizeof(struct ip_vs_dest), GFP_KERNEL);
848 if (dest == NULL) {
849 pr_err("%s(): no memory.\n", __func__);
850 return -ENOMEM;
851 }
852
853 dest->af = svc->af;
854 dest->protocol = svc->protocol;
855 dest->vaddr = svc->addr;
856 dest->vport = svc->port;
857 dest->vfwmark = svc->fwmark;
858 ip_vs_addr_copy(svc->af, &dest->addr, &udest->addr);
859 dest->port = udest->port;
860
861 atomic_set(&dest->activeconns, 0);
862 atomic_set(&dest->inactconns, 0);
863 atomic_set(&dest->persistconns, 0);
864 atomic_set(&dest->refcnt, 0);
865
866 INIT_LIST_HEAD(&dest->d_list);
867 spin_lock_init(&dest->dst_lock);
868 spin_lock_init(&dest->stats.lock);
869 __ip_vs_update_dest(svc, dest, udest);
870 ip_vs_new_estimator(&dest->stats);
871
872 *dest_p = dest;
873
874 LeaveFunction(2);
875 return 0;
876 }
877
878
879 /*
880 * Add a destination into an existing service
881 */
882 static int
883 ip_vs_add_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
884 {
885 struct ip_vs_dest *dest;
886 union nf_inet_addr daddr;
887 __be16 dport = udest->port;
888 int ret;
889
890 EnterFunction(2);
891
892 if (udest->weight < 0) {
893 pr_err("%s(): server weight less than zero\n", __func__);
894 return -ERANGE;
895 }
896
897 if (udest->l_threshold > udest->u_threshold) {
898 pr_err("%s(): lower threshold is higher than upper threshold\n",
899 __func__);
900 return -ERANGE;
901 }
902
903 ip_vs_addr_copy(svc->af, &daddr, &udest->addr);
904
905 /*
906 * Check if the dest already exists in the list
907 */
908 dest = ip_vs_lookup_dest(svc, &daddr, dport);
909
910 if (dest != NULL) {
911 IP_VS_DBG(1, "%s(): dest already exists\n", __func__);
912 return -EEXIST;
913 }
914
915 /*
916 * Check if the dest already exists in the trash and
917 * is from the same service
918 */
919 dest = ip_vs_trash_get_dest(svc, &daddr, dport);
920
921 if (dest != NULL) {
922 IP_VS_DBG_BUF(3, "Get destination %s:%u from trash, "
923 "dest->refcnt=%d, service %u/%s:%u\n",
924 IP_VS_DBG_ADDR(svc->af, &daddr), ntohs(dport),
925 atomic_read(&dest->refcnt),
926 dest->vfwmark,
927 IP_VS_DBG_ADDR(svc->af, &dest->vaddr),
928 ntohs(dest->vport));
929
930 __ip_vs_update_dest(svc, dest, udest);
931
932 /*
933 * Get the destination from the trash
934 */
935 list_del(&dest->n_list);
936
937 ip_vs_new_estimator(&dest->stats);
938
939 write_lock_bh(&__ip_vs_svc_lock);
940
941 /*
942 * Wait until all other svc users go away.
943 */
944 IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
945
946 list_add(&dest->n_list, &svc->destinations);
947 svc->num_dests++;
948
949 /* call the update_service function of its scheduler */
950 if (svc->scheduler->update_service)
951 svc->scheduler->update_service(svc);
952
953 write_unlock_bh(&__ip_vs_svc_lock);
954 return 0;
955 }
956
957 /*
958 * Allocate and initialize the dest structure
959 */
960 ret = ip_vs_new_dest(svc, udest, &dest);
961 if (ret) {
962 return ret;
963 }
964
965 /*
966 * Add the dest entry into the list
967 */
968 atomic_inc(&dest->refcnt);
969
970 write_lock_bh(&__ip_vs_svc_lock);
971
972 /*
973 * Wait until all other svc users go away.
974 */
975 IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
976
977 list_add(&dest->n_list, &svc->destinations);
978 svc->num_dests++;
979
980 /* call the update_service function of its scheduler */
981 if (svc->scheduler->update_service)
982 svc->scheduler->update_service(svc);
983
984 write_unlock_bh(&__ip_vs_svc_lock);
985
986 LeaveFunction(2);
987
988 return 0;
989 }
990
991
992 /*
993 * Edit a destination in the given service
994 */
995 static int
996 ip_vs_edit_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
997 {
998 struct ip_vs_dest *dest;
999 union nf_inet_addr daddr;
1000 __be16 dport = udest->port;
1001
1002 EnterFunction(2);
1003
1004 if (udest->weight < 0) {
1005 pr_err("%s(): server weight less than zero\n", __func__);
1006 return -ERANGE;
1007 }
1008
1009 if (udest->l_threshold > udest->u_threshold) {
1010 pr_err("%s(): lower threshold is higher than upper threshold\n",
1011 __func__);
1012 return -ERANGE;
1013 }
1014
1015 ip_vs_addr_copy(svc->af, &daddr, &udest->addr);
1016
1017 /*
1018 * Lookup the destination list
1019 */
1020 dest = ip_vs_lookup_dest(svc, &daddr, dport);
1021
1022 if (dest == NULL) {
1023 IP_VS_DBG(1, "%s(): dest doesn't exist\n", __func__);
1024 return -ENOENT;
1025 }
1026
1027 __ip_vs_update_dest(svc, dest, udest);
1028
1029 write_lock_bh(&__ip_vs_svc_lock);
1030
1031 /* Wait until all other svc users go away */
1032 IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
1033
1034 /* call the update_service, because server weight may be changed */
1035 if (svc->scheduler->update_service)
1036 svc->scheduler->update_service(svc);
1037
1038 write_unlock_bh(&__ip_vs_svc_lock);
1039
1040 LeaveFunction(2);
1041
1042 return 0;
1043 }
1044
1045
1046 /*
1047 * Delete a destination (must be already unlinked from the service)
1048 */
1049 static void __ip_vs_del_dest(struct ip_vs_dest *dest)
1050 {
1051 ip_vs_kill_estimator(&dest->stats);
1052
1053 /*
1054 * Remove it from the d-linked list with the real services.
1055 */
1056 write_lock_bh(&__ip_vs_rs_lock);
1057 ip_vs_rs_unhash(dest);
1058 write_unlock_bh(&__ip_vs_rs_lock);
1059
1060 /*
1061 * Decrease the refcnt of the dest, and free the dest
1062 * if nobody refers to it (refcnt=0). Otherwise, throw
1063 * the destination into the trash.
1064 */
1065 if (atomic_dec_and_test(&dest->refcnt)) {
1066 ip_vs_dst_reset(dest);
1067 /* simply decrease svc->refcnt here, let the caller check
1068 and release the service if nobody refers to it.
1069 Only user context can release destination and service,
1070 and only one user context can update virtual service at a
1071 time, so the operation here is OK */
1072 atomic_dec(&dest->svc->refcnt);
1073 kfree(dest);
1074 } else {
1075 IP_VS_DBG_BUF(3, "Moving dest %s:%u into trash, "
1076 "dest->refcnt=%d\n",
1077 IP_VS_DBG_ADDR(dest->af, &dest->addr),
1078 ntohs(dest->port),
1079 atomic_read(&dest->refcnt));
1080 list_add(&dest->n_list, &ip_vs_dest_trash);
1081 atomic_inc(&dest->refcnt);
1082 }
1083 }
1084
1085
1086 /*
1087 * Unlink a destination from the given service
1088 */
1089 static void __ip_vs_unlink_dest(struct ip_vs_service *svc,
1090 struct ip_vs_dest *dest,
1091 int svcupd)
1092 {
1093 dest->flags &= ~IP_VS_DEST_F_AVAILABLE;
1094
1095 /*
1096 * Remove it from the d-linked destination list.
1097 */
1098 list_del(&dest->n_list);
1099 svc->num_dests--;
1100
1101 /*
1102 * Call the update_service function of its scheduler
1103 */
1104 if (svcupd && svc->scheduler->update_service)
1105 svc->scheduler->update_service(svc);
1106 }
1107
1108
1109 /*
1110 * Delete a destination server in the given service
1111 */
1112 static int
1113 ip_vs_del_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
1114 {
1115 struct ip_vs_dest *dest;
1116 __be16 dport = udest->port;
1117
1118 EnterFunction(2);
1119
1120 dest = ip_vs_lookup_dest(svc, &udest->addr, dport);
1121
1122 if (dest == NULL) {
1123 IP_VS_DBG(1, "%s(): destination not found!\n", __func__);
1124 return -ENOENT;
1125 }
1126
1127 write_lock_bh(&__ip_vs_svc_lock);
1128
1129 /*
1130 * Wait until all other svc users go away.
1131 */
1132 IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
1133
1134 /*
1135 * Unlink dest from the service
1136 */
1137 __ip_vs_unlink_dest(svc, dest, 1);
1138
1139 write_unlock_bh(&__ip_vs_svc_lock);
1140
1141 /*
1142 * Delete the destination
1143 */
1144 __ip_vs_del_dest(dest);
1145
1146 LeaveFunction(2);
1147
1148 return 0;
1149 }
1150
1151
1152 /*
1153 * Add a service into the service hash table
1154 */
1155 static int
1156 ip_vs_add_service(struct ip_vs_service_user_kern *u,
1157 struct ip_vs_service **svc_p)
1158 {
1159 int ret = 0;
1160 struct ip_vs_scheduler *sched = NULL;
1161 struct ip_vs_service *svc = NULL;
1162
1163 /* increase the module use count */
1164 ip_vs_use_count_inc();
1165
1166 /* Lookup the scheduler by 'u->sched_name' */
1167 sched = ip_vs_scheduler_get(u->sched_name);
1168 if (sched == NULL) {
1169 pr_info("Scheduler module ip_vs_%s not found\n", u->sched_name);
1170 ret = -ENOENT;
1171 goto out_mod_dec;
1172 }
1173
1174 #ifdef CONFIG_IP_VS_IPV6
1175 if (u->af == AF_INET6 && (u->netmask < 1 || u->netmask > 128)) {
1176 ret = -EINVAL;
1177 goto out_err;
1178 }
1179 #endif
1180
1181 svc = kzalloc(sizeof(struct ip_vs_service), GFP_KERNEL);
1182 if (svc == NULL) {
1183 IP_VS_DBG(1, "%s(): no memory\n", __func__);
1184 ret = -ENOMEM;
1185 goto out_err;
1186 }
1187
1188 /* I'm the first user of the service */
1189 atomic_set(&svc->usecnt, 1);
1190 atomic_set(&svc->refcnt, 0);
1191
1192 svc->af = u->af;
1193 svc->protocol = u->protocol;
1194 ip_vs_addr_copy(svc->af, &svc->addr, &u->addr);
1195 svc->port = u->port;
1196 svc->fwmark = u->fwmark;
1197 svc->flags = u->flags;
1198 svc->timeout = u->timeout * HZ;
1199 svc->netmask = u->netmask;
1200
1201 INIT_LIST_HEAD(&svc->destinations);
1202 rwlock_init(&svc->sched_lock);
1203 spin_lock_init(&svc->stats.lock);
1204
1205 /* Bind the scheduler */
1206 ret = ip_vs_bind_scheduler(svc, sched);
1207 if (ret)
1208 goto out_err;
1209 sched = NULL;
1210
1211 /* Update the virtual service counters */
1212 if (svc->port == FTPPORT)
1213 atomic_inc(&ip_vs_ftpsvc_counter);
1214 else if (svc->port == 0)
1215 atomic_inc(&ip_vs_nullsvc_counter);
1216
1217 ip_vs_new_estimator(&svc->stats);
1218
1219 /* Count only IPv4 services for old get/setsockopt interface */
1220 if (svc->af == AF_INET)
1221 ip_vs_num_services++;
1222
1223 /* Hash the service into the service table */
1224 write_lock_bh(&__ip_vs_svc_lock);
1225 ip_vs_svc_hash(svc);
1226 write_unlock_bh(&__ip_vs_svc_lock);
1227
1228 *svc_p = svc;
1229 return 0;
1230
1231 out_err:
1232 if (svc != NULL) {
1233 if (svc->scheduler)
1234 ip_vs_unbind_scheduler(svc);
1235 if (svc->inc) {
1236 local_bh_disable();
1237 ip_vs_app_inc_put(svc->inc);
1238 local_bh_enable();
1239 }
1240 kfree(svc);
1241 }
1242 ip_vs_scheduler_put(sched);
1243
1244 out_mod_dec:
1245 /* decrease the module use count */
1246 ip_vs_use_count_dec();
1247
1248 return ret;
1249 }
1250
1251
1252 /*
1253 * Edit a service and bind it with a new scheduler
1254 */
1255 static int
1256 ip_vs_edit_service(struct ip_vs_service *svc, struct ip_vs_service_user_kern *u)
1257 {
1258 struct ip_vs_scheduler *sched, *old_sched;
1259 int ret = 0;
1260
1261 /*
1262 * Lookup the scheduler, by 'u->sched_name'
1263 */
1264 sched = ip_vs_scheduler_get(u->sched_name);
1265 if (sched == NULL) {
1266 pr_info("Scheduler module ip_vs_%s not found\n", u->sched_name);
1267 return -ENOENT;
1268 }
1269 old_sched = sched;
1270
1271 #ifdef CONFIG_IP_VS_IPV6
1272 if (u->af == AF_INET6 && (u->netmask < 1 || u->netmask > 128)) {
1273 ret = -EINVAL;
1274 goto out;
1275 }
1276 #endif
1277
1278 write_lock_bh(&__ip_vs_svc_lock);
1279
1280 /*
1281 * Wait until all other svc users go away.
1282 */
1283 IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
1284
1285 /*
1286 * Set the flags and timeout value
1287 */
1288 svc->flags = u->flags | IP_VS_SVC_F_HASHED;
1289 svc->timeout = u->timeout * HZ;
1290 svc->netmask = u->netmask;
1291
1292 old_sched = svc->scheduler;
1293 if (sched != old_sched) {
1294 /*
1295 * Unbind the old scheduler
1296 */
1297 if ((ret = ip_vs_unbind_scheduler(svc))) {
1298 old_sched = sched;
1299 goto out_unlock;
1300 }
1301
1302 /*
1303 * Bind the new scheduler
1304 */
1305 if ((ret = ip_vs_bind_scheduler(svc, sched))) {
1306 /*
1307 * If ip_vs_bind_scheduler fails, restore the old
1308 * scheduler.
1309 * The main reason of failure is out of memory.
1310 *
1311 * The question is if the old scheduler can be
1312 * restored all the time. TODO: if it cannot be
1313 * restored some time, we must delete the service,
1314 * otherwise the system may crash.
1315 */
1316 ip_vs_bind_scheduler(svc, old_sched);
1317 old_sched = sched;
1318 goto out_unlock;
1319 }
1320 }
1321
1322 out_unlock:
1323 write_unlock_bh(&__ip_vs_svc_lock);
1324 #ifdef CONFIG_IP_VS_IPV6
1325 out:
1326 #endif
1327
1328 if (old_sched)
1329 ip_vs_scheduler_put(old_sched);
1330
1331 return ret;
1332 }
1333
1334
1335 /*
1336 * Delete a service from the service list
1337 * - The service must be unlinked, unlocked and not referenced!
1338 * - We are called under _bh lock
1339 */
1340 static void __ip_vs_del_service(struct ip_vs_service *svc)
1341 {
1342 struct ip_vs_dest *dest, *nxt;
1343 struct ip_vs_scheduler *old_sched;
1344
1345 /* Count only IPv4 services for old get/setsockopt interface */
1346 if (svc->af == AF_INET)
1347 ip_vs_num_services--;
1348
1349 ip_vs_kill_estimator(&svc->stats);
1350
1351 /* Unbind scheduler */
1352 old_sched = svc->scheduler;
1353 ip_vs_unbind_scheduler(svc);
1354 if (old_sched)
1355 ip_vs_scheduler_put(old_sched);
1356
1357 /* Unbind app inc */
1358 if (svc->inc) {
1359 ip_vs_app_inc_put(svc->inc);
1360 svc->inc = NULL;
1361 }
1362
1363 /*
1364 * Unlink the whole destination list
1365 */
1366 list_for_each_entry_safe(dest, nxt, &svc->destinations, n_list) {
1367 __ip_vs_unlink_dest(svc, dest, 0);
1368 __ip_vs_del_dest(dest);
1369 }
1370
1371 /*
1372 * Update the virtual service counters
1373 */
1374 if (svc->port == FTPPORT)
1375 atomic_dec(&ip_vs_ftpsvc_counter);
1376 else if (svc->port == 0)
1377 atomic_dec(&ip_vs_nullsvc_counter);
1378
1379 /*
1380 * Free the service if nobody refers to it
1381 */
1382 if (atomic_read(&svc->refcnt) == 0)
1383 kfree(svc);
1384
1385 /* decrease the module use count */
1386 ip_vs_use_count_dec();
1387 }
1388
1389 /*
1390 * Delete a service from the service list
1391 */
1392 static int ip_vs_del_service(struct ip_vs_service *svc)
1393 {
1394 if (svc == NULL)
1395 return -EEXIST;
1396
1397 /*
1398 * Unhash it from the service table
1399 */
1400 write_lock_bh(&__ip_vs_svc_lock);
1401
1402 ip_vs_svc_unhash(svc);
1403
1404 /*
1405 * Wait until all the svc users go away.
1406 */
1407 IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
1408
1409 __ip_vs_del_service(svc);
1410
1411 write_unlock_bh(&__ip_vs_svc_lock);
1412
1413 return 0;
1414 }
1415
1416
1417 /*
1418 * Flush all the virtual services
1419 */
1420 static int ip_vs_flush(void)
1421 {
1422 int idx;
1423 struct ip_vs_service *svc, *nxt;
1424
1425 /*
1426 * Flush the service table hashed by <protocol,addr,port>
1427 */
1428 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1429 list_for_each_entry_safe(svc, nxt, &ip_vs_svc_table[idx], s_list) {
1430 write_lock_bh(&__ip_vs_svc_lock);
1431 ip_vs_svc_unhash(svc);
1432 /*
1433 * Wait until all the svc users go away.
1434 */
1435 IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 0);
1436 __ip_vs_del_service(svc);
1437 write_unlock_bh(&__ip_vs_svc_lock);
1438 }
1439 }
1440
1441 /*
1442 * Flush the service table hashed by fwmark
1443 */
1444 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1445 list_for_each_entry_safe(svc, nxt,
1446 &ip_vs_svc_fwm_table[idx], f_list) {
1447 write_lock_bh(&__ip_vs_svc_lock);
1448 ip_vs_svc_unhash(svc);
1449 /*
1450 * Wait until all the svc users go away.
1451 */
1452 IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 0);
1453 __ip_vs_del_service(svc);
1454 write_unlock_bh(&__ip_vs_svc_lock);
1455 }
1456 }
1457
1458 return 0;
1459 }
1460
1461
1462 /*
1463 * Zero counters in a service or all services
1464 */
1465 static int ip_vs_zero_service(struct ip_vs_service *svc)
1466 {
1467 struct ip_vs_dest *dest;
1468
1469 write_lock_bh(&__ip_vs_svc_lock);
1470 list_for_each_entry(dest, &svc->destinations, n_list) {
1471 ip_vs_zero_stats(&dest->stats);
1472 }
1473 ip_vs_zero_stats(&svc->stats);
1474 write_unlock_bh(&__ip_vs_svc_lock);
1475 return 0;
1476 }
1477
1478 static int ip_vs_zero_all(void)
1479 {
1480 int idx;
1481 struct ip_vs_service *svc;
1482
1483 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1484 list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
1485 ip_vs_zero_service(svc);
1486 }
1487 }
1488
1489 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1490 list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
1491 ip_vs_zero_service(svc);
1492 }
1493 }
1494
1495 ip_vs_zero_stats(&ip_vs_stats);
1496 return 0;
1497 }
1498
1499
1500 static int
1501 proc_do_defense_mode(ctl_table *table, int write,
1502 void __user *buffer, size_t *lenp, loff_t *ppos)
1503 {
1504 int *valp = table->data;
1505 int val = *valp;
1506 int rc;
1507
1508 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1509 if (write && (*valp != val)) {
1510 if ((*valp < 0) || (*valp > 3)) {
1511 /* Restore the correct value */
1512 *valp = val;
1513 } else {
1514 update_defense_level();
1515 }
1516 }
1517 return rc;
1518 }
1519
1520
1521 static int
1522 proc_do_sync_threshold(ctl_table *table, int write,
1523 void __user *buffer, size_t *lenp, loff_t *ppos)
1524 {
1525 int *valp = table->data;
1526 int val[2];
1527 int rc;
1528
1529 /* backup the value first */
1530 memcpy(val, valp, sizeof(val));
1531
1532 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1533 if (write && (valp[0] < 0 || valp[1] < 0 || valp[0] >= valp[1])) {
1534 /* Restore the correct value */
1535 memcpy(valp, val, sizeof(val));
1536 }
1537 return rc;
1538 }
1539
1540
1541 /*
1542 * IPVS sysctl table (under the /proc/sys/net/ipv4/vs/)
1543 */
1544
1545 static struct ctl_table vs_vars[] = {
1546 {
1547 .procname = "amemthresh",
1548 .data = &sysctl_ip_vs_amemthresh,
1549 .maxlen = sizeof(int),
1550 .mode = 0644,
1551 .proc_handler = proc_dointvec,
1552 },
1553 #ifdef CONFIG_IP_VS_DEBUG
1554 {
1555 .procname = "debug_level",
1556 .data = &sysctl_ip_vs_debug_level,
1557 .maxlen = sizeof(int),
1558 .mode = 0644,
1559 .proc_handler = proc_dointvec,
1560 },
1561 #endif
1562 {
1563 .procname = "am_droprate",
1564 .data = &sysctl_ip_vs_am_droprate,
1565 .maxlen = sizeof(int),
1566 .mode = 0644,
1567 .proc_handler = proc_dointvec,
1568 },
1569 {
1570 .procname = "drop_entry",
1571 .data = &sysctl_ip_vs_drop_entry,
1572 .maxlen = sizeof(int),
1573 .mode = 0644,
1574 .proc_handler = proc_do_defense_mode,
1575 },
1576 {
1577 .procname = "drop_packet",
1578 .data = &sysctl_ip_vs_drop_packet,
1579 .maxlen = sizeof(int),
1580 .mode = 0644,
1581 .proc_handler = proc_do_defense_mode,
1582 },
1583 {
1584 .procname = "secure_tcp",
1585 .data = &sysctl_ip_vs_secure_tcp,
1586 .maxlen = sizeof(int),
1587 .mode = 0644,
1588 .proc_handler = proc_do_defense_mode,
1589 },
1590 #if 0
1591 {
1592 .procname = "timeout_established",
1593 .data = &vs_timeout_table_dos.timeout[IP_VS_S_ESTABLISHED],
1594 .maxlen = sizeof(int),
1595 .mode = 0644,
1596 .proc_handler = proc_dointvec_jiffies,
1597 },
1598 {
1599 .procname = "timeout_synsent",
1600 .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYN_SENT],
1601 .maxlen = sizeof(int),
1602 .mode = 0644,
1603 .proc_handler = proc_dointvec_jiffies,
1604 },
1605 {
1606 .procname = "timeout_synrecv",
1607 .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYN_RECV],
1608 .maxlen = sizeof(int),
1609 .mode = 0644,
1610 .proc_handler = proc_dointvec_jiffies,
1611 },
1612 {
1613 .procname = "timeout_finwait",
1614 .data = &vs_timeout_table_dos.timeout[IP_VS_S_FIN_WAIT],
1615 .maxlen = sizeof(int),
1616 .mode = 0644,
1617 .proc_handler = proc_dointvec_jiffies,
1618 },
1619 {
1620 .procname = "timeout_timewait",
1621 .data = &vs_timeout_table_dos.timeout[IP_VS_S_TIME_WAIT],
1622 .maxlen = sizeof(int),
1623 .mode = 0644,
1624 .proc_handler = proc_dointvec_jiffies,
1625 },
1626 {
1627 .procname = "timeout_close",
1628 .data = &vs_timeout_table_dos.timeout[IP_VS_S_CLOSE],
1629 .maxlen = sizeof(int),
1630 .mode = 0644,
1631 .proc_handler = proc_dointvec_jiffies,
1632 },
1633 {
1634 .procname = "timeout_closewait",
1635 .data = &vs_timeout_table_dos.timeout[IP_VS_S_CLOSE_WAIT],
1636 .maxlen = sizeof(int),
1637 .mode = 0644,
1638 .proc_handler = proc_dointvec_jiffies,
1639 },
1640 {
1641 .procname = "timeout_lastack",
1642 .data = &vs_timeout_table_dos.timeout[IP_VS_S_LAST_ACK],
1643 .maxlen = sizeof(int),
1644 .mode = 0644,
1645 .proc_handler = proc_dointvec_jiffies,
1646 },
1647 {
1648 .procname = "timeout_listen",
1649 .data = &vs_timeout_table_dos.timeout[IP_VS_S_LISTEN],
1650 .maxlen = sizeof(int),
1651 .mode = 0644,
1652 .proc_handler = proc_dointvec_jiffies,
1653 },
1654 {
1655 .procname = "timeout_synack",
1656 .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYNACK],
1657 .maxlen = sizeof(int),
1658 .mode = 0644,
1659 .proc_handler = proc_dointvec_jiffies,
1660 },
1661 {
1662 .procname = "timeout_udp",
1663 .data = &vs_timeout_table_dos.timeout[IP_VS_S_UDP],
1664 .maxlen = sizeof(int),
1665 .mode = 0644,
1666 .proc_handler = proc_dointvec_jiffies,
1667 },
1668 {
1669 .procname = "timeout_icmp",
1670 .data = &vs_timeout_table_dos.timeout[IP_VS_S_ICMP],
1671 .maxlen = sizeof(int),
1672 .mode = 0644,
1673 .proc_handler = proc_dointvec_jiffies,
1674 },
1675 #endif
1676 {
1677 .procname = "cache_bypass",
1678 .data = &sysctl_ip_vs_cache_bypass,
1679 .maxlen = sizeof(int),
1680 .mode = 0644,
1681 .proc_handler = proc_dointvec,
1682 },
1683 {
1684 .procname = "expire_nodest_conn",
1685 .data = &sysctl_ip_vs_expire_nodest_conn,
1686 .maxlen = sizeof(int),
1687 .mode = 0644,
1688 .proc_handler = proc_dointvec,
1689 },
1690 {
1691 .procname = "expire_quiescent_template",
1692 .data = &sysctl_ip_vs_expire_quiescent_template,
1693 .maxlen = sizeof(int),
1694 .mode = 0644,
1695 .proc_handler = proc_dointvec,
1696 },
1697 {
1698 .procname = "sync_threshold",
1699 .data = &sysctl_ip_vs_sync_threshold,
1700 .maxlen = sizeof(sysctl_ip_vs_sync_threshold),
1701 .mode = 0644,
1702 .proc_handler = proc_do_sync_threshold,
1703 },
1704 {
1705 .procname = "nat_icmp_send",
1706 .data = &sysctl_ip_vs_nat_icmp_send,
1707 .maxlen = sizeof(int),
1708 .mode = 0644,
1709 .proc_handler = proc_dointvec,
1710 },
1711 { }
1712 };
1713
1714 const struct ctl_path net_vs_ctl_path[] = {
1715 { .procname = "net", },
1716 { .procname = "ipv4", },
1717 { .procname = "vs", },
1718 { }
1719 };
1720 EXPORT_SYMBOL_GPL(net_vs_ctl_path);
1721
1722 static struct ctl_table_header * sysctl_header;
1723
1724 #ifdef CONFIG_PROC_FS
1725
1726 struct ip_vs_iter {
1727 struct list_head *table;
1728 int bucket;
1729 };
1730
1731 /*
1732 * Write the contents of the VS rule table to a PROCfs file.
1733 * (It is kept just for backward compatibility)
1734 */
1735 static inline const char *ip_vs_fwd_name(unsigned flags)
1736 {
1737 switch (flags & IP_VS_CONN_F_FWD_MASK) {
1738 case IP_VS_CONN_F_LOCALNODE:
1739 return "Local";
1740 case IP_VS_CONN_F_TUNNEL:
1741 return "Tunnel";
1742 case IP_VS_CONN_F_DROUTE:
1743 return "Route";
1744 default:
1745 return "Masq";
1746 }
1747 }
1748
1749
1750 /* Get the Nth entry in the two lists */
1751 static struct ip_vs_service *ip_vs_info_array(struct seq_file *seq, loff_t pos)
1752 {
1753 struct ip_vs_iter *iter = seq->private;
1754 int idx;
1755 struct ip_vs_service *svc;
1756
1757 /* look in hash by protocol */
1758 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1759 list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
1760 if (pos-- == 0){
1761 iter->table = ip_vs_svc_table;
1762 iter->bucket = idx;
1763 return svc;
1764 }
1765 }
1766 }
1767
1768 /* keep looking in fwmark */
1769 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1770 list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
1771 if (pos-- == 0) {
1772 iter->table = ip_vs_svc_fwm_table;
1773 iter->bucket = idx;
1774 return svc;
1775 }
1776 }
1777 }
1778
1779 return NULL;
1780 }
1781
1782 static void *ip_vs_info_seq_start(struct seq_file *seq, loff_t *pos)
1783 __acquires(__ip_vs_svc_lock)
1784 {
1785
1786 read_lock_bh(&__ip_vs_svc_lock);
1787 return *pos ? ip_vs_info_array(seq, *pos - 1) : SEQ_START_TOKEN;
1788 }
1789
1790
1791 static void *ip_vs_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1792 {
1793 struct list_head *e;
1794 struct ip_vs_iter *iter;
1795 struct ip_vs_service *svc;
1796
1797 ++*pos;
1798 if (v == SEQ_START_TOKEN)
1799 return ip_vs_info_array(seq,0);
1800
1801 svc = v;
1802 iter = seq->private;
1803
1804 if (iter->table == ip_vs_svc_table) {
1805 /* next service in table hashed by protocol */
1806 if ((e = svc->s_list.next) != &ip_vs_svc_table[iter->bucket])
1807 return list_entry(e, struct ip_vs_service, s_list);
1808
1809
1810 while (++iter->bucket < IP_VS_SVC_TAB_SIZE) {
1811 list_for_each_entry(svc,&ip_vs_svc_table[iter->bucket],
1812 s_list) {
1813 return svc;
1814 }
1815 }
1816
1817 iter->table = ip_vs_svc_fwm_table;
1818 iter->bucket = -1;
1819 goto scan_fwmark;
1820 }
1821
1822 /* next service in hashed by fwmark */
1823 if ((e = svc->f_list.next) != &ip_vs_svc_fwm_table[iter->bucket])
1824 return list_entry(e, struct ip_vs_service, f_list);
1825
1826 scan_fwmark:
1827 while (++iter->bucket < IP_VS_SVC_TAB_SIZE) {
1828 list_for_each_entry(svc, &ip_vs_svc_fwm_table[iter->bucket],
1829 f_list)
1830 return svc;
1831 }
1832
1833 return NULL;
1834 }
1835
1836 static void ip_vs_info_seq_stop(struct seq_file *seq, void *v)
1837 __releases(__ip_vs_svc_lock)
1838 {
1839 read_unlock_bh(&__ip_vs_svc_lock);
1840 }
1841
1842
1843 static int ip_vs_info_seq_show(struct seq_file *seq, void *v)
1844 {
1845 if (v == SEQ_START_TOKEN) {
1846 seq_printf(seq,
1847 "IP Virtual Server version %d.%d.%d (size=%d)\n",
1848 NVERSION(IP_VS_VERSION_CODE), ip_vs_conn_tab_size);
1849 seq_puts(seq,
1850 "Prot LocalAddress:Port Scheduler Flags\n");
1851 seq_puts(seq,
1852 " -> RemoteAddress:Port Forward Weight ActiveConn InActConn\n");
1853 } else {
1854 const struct ip_vs_service *svc = v;
1855 const struct ip_vs_iter *iter = seq->private;
1856 const struct ip_vs_dest *dest;
1857
1858 if (iter->table == ip_vs_svc_table) {
1859 #ifdef CONFIG_IP_VS_IPV6
1860 if (svc->af == AF_INET6)
1861 seq_printf(seq, "%s [%pI6]:%04X %s ",
1862 ip_vs_proto_name(svc->protocol),
1863 &svc->addr.in6,
1864 ntohs(svc->port),
1865 svc->scheduler->name);
1866 else
1867 #endif
1868 seq_printf(seq, "%s %08X:%04X %s %s ",
1869 ip_vs_proto_name(svc->protocol),
1870 ntohl(svc->addr.ip),
1871 ntohs(svc->port),
1872 svc->scheduler->name,
1873 (svc->flags & IP_VS_SVC_F_ONEPACKET)?"ops ":"");
1874 } else {
1875 seq_printf(seq, "FWM %08X %s %s",
1876 svc->fwmark, svc->scheduler->name,
1877 (svc->flags & IP_VS_SVC_F_ONEPACKET)?"ops ":"");
1878 }
1879
1880 if (svc->flags & IP_VS_SVC_F_PERSISTENT)
1881 seq_printf(seq, "persistent %d %08X\n",
1882 svc->timeout,
1883 ntohl(svc->netmask));
1884 else
1885 seq_putc(seq, '\n');
1886
1887 list_for_each_entry(dest, &svc->destinations, n_list) {
1888 #ifdef CONFIG_IP_VS_IPV6
1889 if (dest->af == AF_INET6)
1890 seq_printf(seq,
1891 " -> [%pI6]:%04X"
1892 " %-7s %-6d %-10d %-10d\n",
1893 &dest->addr.in6,
1894 ntohs(dest->port),
1895 ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
1896 atomic_read(&dest->weight),
1897 atomic_read(&dest->activeconns),
1898 atomic_read(&dest->inactconns));
1899 else
1900 #endif
1901 seq_printf(seq,
1902 " -> %08X:%04X "
1903 "%-7s %-6d %-10d %-10d\n",
1904 ntohl(dest->addr.ip),
1905 ntohs(dest->port),
1906 ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
1907 atomic_read(&dest->weight),
1908 atomic_read(&dest->activeconns),
1909 atomic_read(&dest->inactconns));
1910
1911 }
1912 }
1913 return 0;
1914 }
1915
1916 static const struct seq_operations ip_vs_info_seq_ops = {
1917 .start = ip_vs_info_seq_start,
1918 .next = ip_vs_info_seq_next,
1919 .stop = ip_vs_info_seq_stop,
1920 .show = ip_vs_info_seq_show,
1921 };
1922
1923 static int ip_vs_info_open(struct inode *inode, struct file *file)
1924 {
1925 return seq_open_private(file, &ip_vs_info_seq_ops,
1926 sizeof(struct ip_vs_iter));
1927 }
1928
1929 static const struct file_operations ip_vs_info_fops = {
1930 .owner = THIS_MODULE,
1931 .open = ip_vs_info_open,
1932 .read = seq_read,
1933 .llseek = seq_lseek,
1934 .release = seq_release_private,
1935 };
1936
1937 #endif
1938
1939 struct ip_vs_stats ip_vs_stats = {
1940 .lock = __SPIN_LOCK_UNLOCKED(ip_vs_stats.lock),
1941 };
1942
1943 #ifdef CONFIG_PROC_FS
1944 static int ip_vs_stats_show(struct seq_file *seq, void *v)
1945 {
1946
1947 /* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
1948 seq_puts(seq,
1949 " Total Incoming Outgoing Incoming Outgoing\n");
1950 seq_printf(seq,
1951 " Conns Packets Packets Bytes Bytes\n");
1952
1953 spin_lock_bh(&ip_vs_stats.lock);
1954 seq_printf(seq, "%8X %8X %8X %16LX %16LX\n\n", ip_vs_stats.ustats.conns,
1955 ip_vs_stats.ustats.inpkts, ip_vs_stats.ustats.outpkts,
1956 (unsigned long long) ip_vs_stats.ustats.inbytes,
1957 (unsigned long long) ip_vs_stats.ustats.outbytes);
1958
1959 /* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
1960 seq_puts(seq,
1961 " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
1962 seq_printf(seq,"%8X %8X %8X %16X %16X\n",
1963 ip_vs_stats.ustats.cps,
1964 ip_vs_stats.ustats.inpps,
1965 ip_vs_stats.ustats.outpps,
1966 ip_vs_stats.ustats.inbps,
1967 ip_vs_stats.ustats.outbps);
1968 spin_unlock_bh(&ip_vs_stats.lock);
1969
1970 return 0;
1971 }
1972
1973 static int ip_vs_stats_seq_open(struct inode *inode, struct file *file)
1974 {
1975 return single_open(file, ip_vs_stats_show, NULL);
1976 }
1977
1978 static const struct file_operations ip_vs_stats_fops = {
1979 .owner = THIS_MODULE,
1980 .open = ip_vs_stats_seq_open,
1981 .read = seq_read,
1982 .llseek = seq_lseek,
1983 .release = single_release,
1984 };
1985
1986 #endif
1987
1988 /*
1989 * Set timeout values for tcp tcpfin udp in the timeout_table.
1990 */
1991 static int ip_vs_set_timeout(struct ip_vs_timeout_user *u)
1992 {
1993 IP_VS_DBG(2, "Setting timeout tcp:%d tcpfin:%d udp:%d\n",
1994 u->tcp_timeout,
1995 u->tcp_fin_timeout,
1996 u->udp_timeout);
1997
1998 #ifdef CONFIG_IP_VS_PROTO_TCP
1999 if (u->tcp_timeout) {
2000 ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_ESTABLISHED]
2001 = u->tcp_timeout * HZ;
2002 }
2003
2004 if (u->tcp_fin_timeout) {
2005 ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_FIN_WAIT]
2006 = u->tcp_fin_timeout * HZ;
2007 }
2008 #endif
2009
2010 #ifdef CONFIG_IP_VS_PROTO_UDP
2011 if (u->udp_timeout) {
2012 ip_vs_protocol_udp.timeout_table[IP_VS_UDP_S_NORMAL]
2013 = u->udp_timeout * HZ;
2014 }
2015 #endif
2016 return 0;
2017 }
2018
2019
2020 #define SET_CMDID(cmd) (cmd - IP_VS_BASE_CTL)
2021 #define SERVICE_ARG_LEN (sizeof(struct ip_vs_service_user))
2022 #define SVCDEST_ARG_LEN (sizeof(struct ip_vs_service_user) + \
2023 sizeof(struct ip_vs_dest_user))
2024 #define TIMEOUT_ARG_LEN (sizeof(struct ip_vs_timeout_user))
2025 #define DAEMON_ARG_LEN (sizeof(struct ip_vs_daemon_user))
2026 #define MAX_ARG_LEN SVCDEST_ARG_LEN
2027
2028 static const unsigned char set_arglen[SET_CMDID(IP_VS_SO_SET_MAX)+1] = {
2029 [SET_CMDID(IP_VS_SO_SET_ADD)] = SERVICE_ARG_LEN,
2030 [SET_CMDID(IP_VS_SO_SET_EDIT)] = SERVICE_ARG_LEN,
2031 [SET_CMDID(IP_VS_SO_SET_DEL)] = SERVICE_ARG_LEN,
2032 [SET_CMDID(IP_VS_SO_SET_FLUSH)] = 0,
2033 [SET_CMDID(IP_VS_SO_SET_ADDDEST)] = SVCDEST_ARG_LEN,
2034 [SET_CMDID(IP_VS_SO_SET_DELDEST)] = SVCDEST_ARG_LEN,
2035 [SET_CMDID(IP_VS_SO_SET_EDITDEST)] = SVCDEST_ARG_LEN,
2036 [SET_CMDID(IP_VS_SO_SET_TIMEOUT)] = TIMEOUT_ARG_LEN,
2037 [SET_CMDID(IP_VS_SO_SET_STARTDAEMON)] = DAEMON_ARG_LEN,
2038 [SET_CMDID(IP_VS_SO_SET_STOPDAEMON)] = DAEMON_ARG_LEN,
2039 [SET_CMDID(IP_VS_SO_SET_ZERO)] = SERVICE_ARG_LEN,
2040 };
2041
2042 static void ip_vs_copy_usvc_compat(struct ip_vs_service_user_kern *usvc,
2043 struct ip_vs_service_user *usvc_compat)
2044 {
2045 usvc->af = AF_INET;
2046 usvc->protocol = usvc_compat->protocol;
2047 usvc->addr.ip = usvc_compat->addr;
2048 usvc->port = usvc_compat->port;
2049 usvc->fwmark = usvc_compat->fwmark;
2050
2051 /* Deep copy of sched_name is not needed here */
2052 usvc->sched_name = usvc_compat->sched_name;
2053
2054 usvc->flags = usvc_compat->flags;
2055 usvc->timeout = usvc_compat->timeout;
2056 usvc->netmask = usvc_compat->netmask;
2057 }
2058
2059 static void ip_vs_copy_udest_compat(struct ip_vs_dest_user_kern *udest,
2060 struct ip_vs_dest_user *udest_compat)
2061 {
2062 udest->addr.ip = udest_compat->addr;
2063 udest->port = udest_compat->port;
2064 udest->conn_flags = udest_compat->conn_flags;
2065 udest->weight = udest_compat->weight;
2066 udest->u_threshold = udest_compat->u_threshold;
2067 udest->l_threshold = udest_compat->l_threshold;
2068 }
2069
2070 static int
2071 do_ip_vs_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len)
2072 {
2073 int ret;
2074 unsigned char arg[MAX_ARG_LEN];
2075 struct ip_vs_service_user *usvc_compat;
2076 struct ip_vs_service_user_kern usvc;
2077 struct ip_vs_service *svc;
2078 struct ip_vs_dest_user *udest_compat;
2079 struct ip_vs_dest_user_kern udest;
2080
2081 if (!capable(CAP_NET_ADMIN))
2082 return -EPERM;
2083
2084 if (cmd < IP_VS_BASE_CTL || cmd > IP_VS_SO_SET_MAX)
2085 return -EINVAL;
2086 if (len < 0 || len > MAX_ARG_LEN)
2087 return -EINVAL;
2088 if (len != set_arglen[SET_CMDID(cmd)]) {
2089 pr_err("set_ctl: len %u != %u\n",
2090 len, set_arglen[SET_CMDID(cmd)]);
2091 return -EINVAL;
2092 }
2093
2094 if (copy_from_user(arg, user, len) != 0)
2095 return -EFAULT;
2096
2097 /* increase the module use count */
2098 ip_vs_use_count_inc();
2099
2100 if (mutex_lock_interruptible(&__ip_vs_mutex)) {
2101 ret = -ERESTARTSYS;
2102 goto out_dec;
2103 }
2104
2105 if (cmd == IP_VS_SO_SET_FLUSH) {
2106 /* Flush the virtual service */
2107 ret = ip_vs_flush();
2108 goto out_unlock;
2109 } else if (cmd == IP_VS_SO_SET_TIMEOUT) {
2110 /* Set timeout values for (tcp tcpfin udp) */
2111 ret = ip_vs_set_timeout((struct ip_vs_timeout_user *)arg);
2112 goto out_unlock;
2113 } else if (cmd == IP_VS_SO_SET_STARTDAEMON) {
2114 struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg;
2115 ret = start_sync_thread(dm->state, dm->mcast_ifn, dm->syncid);
2116 goto out_unlock;
2117 } else if (cmd == IP_VS_SO_SET_STOPDAEMON) {
2118 struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg;
2119 ret = stop_sync_thread(dm->state);
2120 goto out_unlock;
2121 }
2122
2123 usvc_compat = (struct ip_vs_service_user *)arg;
2124 udest_compat = (struct ip_vs_dest_user *)(usvc_compat + 1);
2125
2126 /* We only use the new structs internally, so copy userspace compat
2127 * structs to extended internal versions */
2128 ip_vs_copy_usvc_compat(&usvc, usvc_compat);
2129 ip_vs_copy_udest_compat(&udest, udest_compat);
2130
2131 if (cmd == IP_VS_SO_SET_ZERO) {
2132 /* if no service address is set, zero counters in all */
2133 if (!usvc.fwmark && !usvc.addr.ip && !usvc.port) {
2134 ret = ip_vs_zero_all();
2135 goto out_unlock;
2136 }
2137 }
2138
2139 /* Check for valid protocol: TCP or UDP or SCTP, even for fwmark!=0 */
2140 if (usvc.protocol != IPPROTO_TCP && usvc.protocol != IPPROTO_UDP &&
2141 usvc.protocol != IPPROTO_SCTP) {
2142 pr_err("set_ctl: invalid protocol: %d %pI4:%d %s\n",
2143 usvc.protocol, &usvc.addr.ip,
2144 ntohs(usvc.port), usvc.sched_name);
2145 ret = -EFAULT;
2146 goto out_unlock;
2147 }
2148
2149 /* Lookup the exact service by <protocol, addr, port> or fwmark */
2150 if (usvc.fwmark == 0)
2151 svc = __ip_vs_service_get(usvc.af, usvc.protocol,
2152 &usvc.addr, usvc.port);
2153 else
2154 svc = __ip_vs_svc_fwm_get(usvc.af, usvc.fwmark);
2155
2156 if (cmd != IP_VS_SO_SET_ADD
2157 && (svc == NULL || svc->protocol != usvc.protocol)) {
2158 ret = -ESRCH;
2159 goto out_drop_service;
2160 }
2161
2162 switch (cmd) {
2163 case IP_VS_SO_SET_ADD:
2164 if (svc != NULL)
2165 ret = -EEXIST;
2166 else
2167 ret = ip_vs_add_service(&usvc, &svc);
2168 break;
2169 case IP_VS_SO_SET_EDIT:
2170 ret = ip_vs_edit_service(svc, &usvc);
2171 break;
2172 case IP_VS_SO_SET_DEL:
2173 ret = ip_vs_del_service(svc);
2174 if (!ret)
2175 goto out_unlock;
2176 break;
2177 case IP_VS_SO_SET_ZERO:
2178 ret = ip_vs_zero_service(svc);
2179 break;
2180 case IP_VS_SO_SET_ADDDEST:
2181 ret = ip_vs_add_dest(svc, &udest);
2182 break;
2183 case IP_VS_SO_SET_EDITDEST:
2184 ret = ip_vs_edit_dest(svc, &udest);
2185 break;
2186 case IP_VS_SO_SET_DELDEST:
2187 ret = ip_vs_del_dest(svc, &udest);
2188 break;
2189 default:
2190 ret = -EINVAL;
2191 }
2192
2193 out_drop_service:
2194 if (svc)
2195 ip_vs_service_put(svc);
2196
2197 out_unlock:
2198 mutex_unlock(&__ip_vs_mutex);
2199 out_dec:
2200 /* decrease the module use count */
2201 ip_vs_use_count_dec();
2202
2203 return ret;
2204 }
2205
2206
2207 static void
2208 ip_vs_copy_stats(struct ip_vs_stats_user *dst, struct ip_vs_stats *src)
2209 {
2210 spin_lock_bh(&src->lock);
2211 memcpy(dst, &src->ustats, sizeof(*dst));
2212 spin_unlock_bh(&src->lock);
2213 }
2214
2215 static void
2216 ip_vs_copy_service(struct ip_vs_service_entry *dst, struct ip_vs_service *src)
2217 {
2218 dst->protocol = src->protocol;
2219 dst->addr = src->addr.ip;
2220 dst->port = src->port;
2221 dst->fwmark = src->fwmark;
2222 strlcpy(dst->sched_name, src->scheduler->name, sizeof(dst->sched_name));
2223 dst->flags = src->flags;
2224 dst->timeout = src->timeout / HZ;
2225 dst->netmask = src->netmask;
2226 dst->num_dests = src->num_dests;
2227 ip_vs_copy_stats(&dst->stats, &src->stats);
2228 }
2229
2230 static inline int
2231 __ip_vs_get_service_entries(const struct ip_vs_get_services *get,
2232 struct ip_vs_get_services __user *uptr)
2233 {
2234 int idx, count=0;
2235 struct ip_vs_service *svc;
2236 struct ip_vs_service_entry entry;
2237 int ret = 0;
2238
2239 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
2240 list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
2241 /* Only expose IPv4 entries to old interface */
2242 if (svc->af != AF_INET)
2243 continue;
2244
2245 if (count >= get->num_services)
2246 goto out;
2247 memset(&entry, 0, sizeof(entry));
2248 ip_vs_copy_service(&entry, svc);
2249 if (copy_to_user(&uptr->entrytable[count],
2250 &entry, sizeof(entry))) {
2251 ret = -EFAULT;
2252 goto out;
2253 }
2254 count++;
2255 }
2256 }
2257
2258 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
2259 list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
2260 /* Only expose IPv4 entries to old interface */
2261 if (svc->af != AF_INET)
2262 continue;
2263
2264 if (count >= get->num_services)
2265 goto out;
2266 memset(&entry, 0, sizeof(entry));
2267 ip_vs_copy_service(&entry, svc);
2268 if (copy_to_user(&uptr->entrytable[count],
2269 &entry, sizeof(entry))) {
2270 ret = -EFAULT;
2271 goto out;
2272 }
2273 count++;
2274 }
2275 }
2276 out:
2277 return ret;
2278 }
2279
2280 static inline int
2281 __ip_vs_get_dest_entries(const struct ip_vs_get_dests *get,
2282 struct ip_vs_get_dests __user *uptr)
2283 {
2284 struct ip_vs_service *svc;
2285 union nf_inet_addr addr = { .ip = get->addr };
2286 int ret = 0;
2287
2288 if (get->fwmark)
2289 svc = __ip_vs_svc_fwm_get(AF_INET, get->fwmark);
2290 else
2291 svc = __ip_vs_service_get(AF_INET, get->protocol, &addr,
2292 get->port);
2293
2294 if (svc) {
2295 int count = 0;
2296 struct ip_vs_dest *dest;
2297 struct ip_vs_dest_entry entry;
2298
2299 list_for_each_entry(dest, &svc->destinations, n_list) {
2300 if (count >= get->num_dests)
2301 break;
2302
2303 entry.addr = dest->addr.ip;
2304 entry.port = dest->port;
2305 entry.conn_flags = atomic_read(&dest->conn_flags);
2306 entry.weight = atomic_read(&dest->weight);
2307 entry.u_threshold = dest->u_threshold;
2308 entry.l_threshold = dest->l_threshold;
2309 entry.activeconns = atomic_read(&dest->activeconns);
2310 entry.inactconns = atomic_read(&dest->inactconns);
2311 entry.persistconns = atomic_read(&dest->persistconns);
2312 ip_vs_copy_stats(&entry.stats, &dest->stats);
2313 if (copy_to_user(&uptr->entrytable[count],
2314 &entry, sizeof(entry))) {
2315 ret = -EFAULT;
2316 break;
2317 }
2318 count++;
2319 }
2320 ip_vs_service_put(svc);
2321 } else
2322 ret = -ESRCH;
2323 return ret;
2324 }
2325
2326 static inline void
2327 __ip_vs_get_timeouts(struct ip_vs_timeout_user *u)
2328 {
2329 #ifdef CONFIG_IP_VS_PROTO_TCP
2330 u->tcp_timeout =
2331 ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_ESTABLISHED] / HZ;
2332 u->tcp_fin_timeout =
2333 ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_FIN_WAIT] / HZ;
2334 #endif
2335 #ifdef CONFIG_IP_VS_PROTO_UDP
2336 u->udp_timeout =
2337 ip_vs_protocol_udp.timeout_table[IP_VS_UDP_S_NORMAL] / HZ;
2338 #endif
2339 }
2340
2341
2342 #define GET_CMDID(cmd) (cmd - IP_VS_BASE_CTL)
2343 #define GET_INFO_ARG_LEN (sizeof(struct ip_vs_getinfo))
2344 #define GET_SERVICES_ARG_LEN (sizeof(struct ip_vs_get_services))
2345 #define GET_SERVICE_ARG_LEN (sizeof(struct ip_vs_service_entry))
2346 #define GET_DESTS_ARG_LEN (sizeof(struct ip_vs_get_dests))
2347 #define GET_TIMEOUT_ARG_LEN (sizeof(struct ip_vs_timeout_user))
2348 #define GET_DAEMON_ARG_LEN (sizeof(struct ip_vs_daemon_user) * 2)
2349
2350 static const unsigned char get_arglen[GET_CMDID(IP_VS_SO_GET_MAX)+1] = {
2351 [GET_CMDID(IP_VS_SO_GET_VERSION)] = 64,
2352 [GET_CMDID(IP_VS_SO_GET_INFO)] = GET_INFO_ARG_LEN,
2353 [GET_CMDID(IP_VS_SO_GET_SERVICES)] = GET_SERVICES_ARG_LEN,
2354 [GET_CMDID(IP_VS_SO_GET_SERVICE)] = GET_SERVICE_ARG_LEN,
2355 [GET_CMDID(IP_VS_SO_GET_DESTS)] = GET_DESTS_ARG_LEN,
2356 [GET_CMDID(IP_VS_SO_GET_TIMEOUT)] = GET_TIMEOUT_ARG_LEN,
2357 [GET_CMDID(IP_VS_SO_GET_DAEMON)] = GET_DAEMON_ARG_LEN,
2358 };
2359
2360 static int
2361 do_ip_vs_get_ctl(struct sock *sk, int cmd, void __user *user, int *len)
2362 {
2363 unsigned char arg[128];
2364 int ret = 0;
2365 unsigned int copylen;
2366
2367 if (!capable(CAP_NET_ADMIN))
2368 return -EPERM;
2369
2370 if (cmd < IP_VS_BASE_CTL || cmd > IP_VS_SO_GET_MAX)
2371 return -EINVAL;
2372
2373 if (*len < get_arglen[GET_CMDID(cmd)]) {
2374 pr_err("get_ctl: len %u < %u\n",
2375 *len, get_arglen[GET_CMDID(cmd)]);
2376 return -EINVAL;
2377 }
2378
2379 copylen = get_arglen[GET_CMDID(cmd)];
2380 if (copylen > 128)
2381 return -EINVAL;
2382
2383 if (copy_from_user(arg, user, copylen) != 0)
2384 return -EFAULT;
2385
2386 if (mutex_lock_interruptible(&__ip_vs_mutex))
2387 return -ERESTARTSYS;
2388
2389 switch (cmd) {
2390 case IP_VS_SO_GET_VERSION:
2391 {
2392 char buf[64];
2393
2394 sprintf(buf, "IP Virtual Server version %d.%d.%d (size=%d)",
2395 NVERSION(IP_VS_VERSION_CODE), ip_vs_conn_tab_size);
2396 if (copy_to_user(user, buf, strlen(buf)+1) != 0) {
2397 ret = -EFAULT;
2398 goto out;
2399 }
2400 *len = strlen(buf)+1;
2401 }
2402 break;
2403
2404 case IP_VS_SO_GET_INFO:
2405 {
2406 struct ip_vs_getinfo info;
2407 info.version = IP_VS_VERSION_CODE;
2408 info.size = ip_vs_conn_tab_size;
2409 info.num_services = ip_vs_num_services;
2410 if (copy_to_user(user, &info, sizeof(info)) != 0)
2411 ret = -EFAULT;
2412 }
2413 break;
2414
2415 case IP_VS_SO_GET_SERVICES:
2416 {
2417 struct ip_vs_get_services *get;
2418 int size;
2419
2420 get = (struct ip_vs_get_services *)arg;
2421 size = sizeof(*get) +
2422 sizeof(struct ip_vs_service_entry) * get->num_services;
2423 if (*len != size) {
2424 pr_err("length: %u != %u\n", *len, size);
2425 ret = -EINVAL;
2426 goto out;
2427 }
2428 ret = __ip_vs_get_service_entries(get, user);
2429 }
2430 break;
2431
2432 case IP_VS_SO_GET_SERVICE:
2433 {
2434 struct ip_vs_service_entry *entry;
2435 struct ip_vs_service *svc;
2436 union nf_inet_addr addr;
2437
2438 entry = (struct ip_vs_service_entry *)arg;
2439 addr.ip = entry->addr;
2440 if (entry->fwmark)
2441 svc = __ip_vs_svc_fwm_get(AF_INET, entry->fwmark);
2442 else
2443 svc = __ip_vs_service_get(AF_INET, entry->protocol,
2444 &addr, entry->port);
2445 if (svc) {
2446 ip_vs_copy_service(entry, svc);
2447 if (copy_to_user(user, entry, sizeof(*entry)) != 0)
2448 ret = -EFAULT;
2449 ip_vs_service_put(svc);
2450 } else
2451 ret = -ESRCH;
2452 }
2453 break;
2454
2455 case IP_VS_SO_GET_DESTS:
2456 {
2457 struct ip_vs_get_dests *get;
2458 int size;
2459
2460 get = (struct ip_vs_get_dests *)arg;
2461 size = sizeof(*get) +
2462 sizeof(struct ip_vs_dest_entry) * get->num_dests;
2463 if (*len != size) {
2464 pr_err("length: %u != %u\n", *len, size);
2465 ret = -EINVAL;
2466 goto out;
2467 }
2468 ret = __ip_vs_get_dest_entries(get, user);
2469 }
2470 break;
2471
2472 case IP_VS_SO_GET_TIMEOUT:
2473 {
2474 struct ip_vs_timeout_user t;
2475
2476 __ip_vs_get_timeouts(&t);
2477 if (copy_to_user(user, &t, sizeof(t)) != 0)
2478 ret = -EFAULT;
2479 }
2480 break;
2481
2482 case IP_VS_SO_GET_DAEMON:
2483 {
2484 struct ip_vs_daemon_user d[2];
2485
2486 memset(&d, 0, sizeof(d));
2487 if (ip_vs_sync_state & IP_VS_STATE_MASTER) {
2488 d[0].state = IP_VS_STATE_MASTER;
2489 strlcpy(d[0].mcast_ifn, ip_vs_master_mcast_ifn, sizeof(d[0].mcast_ifn));
2490 d[0].syncid = ip_vs_master_syncid;
2491 }
2492 if (ip_vs_sync_state & IP_VS_STATE_BACKUP) {
2493 d[1].state = IP_VS_STATE_BACKUP;
2494 strlcpy(d[1].mcast_ifn, ip_vs_backup_mcast_ifn, sizeof(d[1].mcast_ifn));
2495 d[1].syncid = ip_vs_backup_syncid;
2496 }
2497 if (copy_to_user(user, &d, sizeof(d)) != 0)
2498 ret = -EFAULT;
2499 }
2500 break;
2501
2502 default:
2503 ret = -EINVAL;
2504 }
2505
2506 out:
2507 mutex_unlock(&__ip_vs_mutex);
2508 return ret;
2509 }
2510
2511
2512 static struct nf_sockopt_ops ip_vs_sockopts = {
2513 .pf = PF_INET,
2514 .set_optmin = IP_VS_BASE_CTL,
2515 .set_optmax = IP_VS_SO_SET_MAX+1,
2516 .set = do_ip_vs_set_ctl,
2517 .get_optmin = IP_VS_BASE_CTL,
2518 .get_optmax = IP_VS_SO_GET_MAX+1,
2519 .get = do_ip_vs_get_ctl,
2520 .owner = THIS_MODULE,
2521 };
2522
2523 /*
2524 * Generic Netlink interface
2525 */
2526
2527 /* IPVS genetlink family */
2528 static struct genl_family ip_vs_genl_family = {
2529 .id = GENL_ID_GENERATE,
2530 .hdrsize = 0,
2531 .name = IPVS_GENL_NAME,
2532 .version = IPVS_GENL_VERSION,
2533 .maxattr = IPVS_CMD_MAX,
2534 };
2535
2536 /* Policy used for first-level command attributes */
2537 static const struct nla_policy ip_vs_cmd_policy[IPVS_CMD_ATTR_MAX + 1] = {
2538 [IPVS_CMD_ATTR_SERVICE] = { .type = NLA_NESTED },
2539 [IPVS_CMD_ATTR_DEST] = { .type = NLA_NESTED },
2540 [IPVS_CMD_ATTR_DAEMON] = { .type = NLA_NESTED },
2541 [IPVS_CMD_ATTR_TIMEOUT_TCP] = { .type = NLA_U32 },
2542 [IPVS_CMD_ATTR_TIMEOUT_TCP_FIN] = { .type = NLA_U32 },
2543 [IPVS_CMD_ATTR_TIMEOUT_UDP] = { .type = NLA_U32 },
2544 };
2545
2546 /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DAEMON */
2547 static const struct nla_policy ip_vs_daemon_policy[IPVS_DAEMON_ATTR_MAX + 1] = {
2548 [IPVS_DAEMON_ATTR_STATE] = { .type = NLA_U32 },
2549 [IPVS_DAEMON_ATTR_MCAST_IFN] = { .type = NLA_NUL_STRING,
2550 .len = IP_VS_IFNAME_MAXLEN },
2551 [IPVS_DAEMON_ATTR_SYNC_ID] = { .type = NLA_U32 },
2552 };
2553
2554 /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_SERVICE */
2555 static const struct nla_policy ip_vs_svc_policy[IPVS_SVC_ATTR_MAX + 1] = {
2556 [IPVS_SVC_ATTR_AF] = { .type = NLA_U16 },
2557 [IPVS_SVC_ATTR_PROTOCOL] = { .type = NLA_U16 },
2558 [IPVS_SVC_ATTR_ADDR] = { .type = NLA_BINARY,
2559 .len = sizeof(union nf_inet_addr) },
2560 [IPVS_SVC_ATTR_PORT] = { .type = NLA_U16 },
2561 [IPVS_SVC_ATTR_FWMARK] = { .type = NLA_U32 },
2562 [IPVS_SVC_ATTR_SCHED_NAME] = { .type = NLA_NUL_STRING,
2563 .len = IP_VS_SCHEDNAME_MAXLEN },
2564 [IPVS_SVC_ATTR_FLAGS] = { .type = NLA_BINARY,
2565 .len = sizeof(struct ip_vs_flags) },
2566 [IPVS_SVC_ATTR_TIMEOUT] = { .type = NLA_U32 },
2567 [IPVS_SVC_ATTR_NETMASK] = { .type = NLA_U32 },
2568 [IPVS_SVC_ATTR_STATS] = { .type = NLA_NESTED },
2569 };
2570
2571 /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DEST */
2572 static const struct nla_policy ip_vs_dest_policy[IPVS_DEST_ATTR_MAX + 1] = {
2573 [IPVS_DEST_ATTR_ADDR] = { .type = NLA_BINARY,
2574 .len = sizeof(union nf_inet_addr) },
2575 [IPVS_DEST_ATTR_PORT] = { .type = NLA_U16 },
2576 [IPVS_DEST_ATTR_FWD_METHOD] = { .type = NLA_U32 },
2577 [IPVS_DEST_ATTR_WEIGHT] = { .type = NLA_U32 },
2578 [IPVS_DEST_ATTR_U_THRESH] = { .type = NLA_U32 },
2579 [IPVS_DEST_ATTR_L_THRESH] = { .type = NLA_U32 },
2580 [IPVS_DEST_ATTR_ACTIVE_CONNS] = { .type = NLA_U32 },
2581 [IPVS_DEST_ATTR_INACT_CONNS] = { .type = NLA_U32 },
2582 [IPVS_DEST_ATTR_PERSIST_CONNS] = { .type = NLA_U32 },
2583 [IPVS_DEST_ATTR_STATS] = { .type = NLA_NESTED },
2584 };
2585
2586 static int ip_vs_genl_fill_stats(struct sk_buff *skb, int container_type,
2587 struct ip_vs_stats *stats)
2588 {
2589 struct nlattr *nl_stats = nla_nest_start(skb, container_type);
2590 if (!nl_stats)
2591 return -EMSGSIZE;
2592
2593 spin_lock_bh(&stats->lock);
2594
2595 NLA_PUT_U32(skb, IPVS_STATS_ATTR_CONNS, stats->ustats.conns);
2596 NLA_PUT_U32(skb, IPVS_STATS_ATTR_INPKTS, stats->ustats.inpkts);
2597 NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTPKTS, stats->ustats.outpkts);
2598 NLA_PUT_U64(skb, IPVS_STATS_ATTR_INBYTES, stats->ustats.inbytes);
2599 NLA_PUT_U64(skb, IPVS_STATS_ATTR_OUTBYTES, stats->ustats.outbytes);
2600 NLA_PUT_U32(skb, IPVS_STATS_ATTR_CPS, stats->ustats.cps);
2601 NLA_PUT_U32(skb, IPVS_STATS_ATTR_INPPS, stats->ustats.inpps);
2602 NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTPPS, stats->ustats.outpps);
2603 NLA_PUT_U32(skb, IPVS_STATS_ATTR_INBPS, stats->ustats.inbps);
2604 NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTBPS, stats->ustats.outbps);
2605
2606 spin_unlock_bh(&stats->lock);
2607
2608 nla_nest_end(skb, nl_stats);
2609
2610 return 0;
2611
2612 nla_put_failure:
2613 spin_unlock_bh(&stats->lock);
2614 nla_nest_cancel(skb, nl_stats);
2615 return -EMSGSIZE;
2616 }
2617
2618 static int ip_vs_genl_fill_service(struct sk_buff *skb,
2619 struct ip_vs_service *svc)
2620 {
2621 struct nlattr *nl_service;
2622 struct ip_vs_flags flags = { .flags = svc->flags,
2623 .mask = ~0 };
2624
2625 nl_service = nla_nest_start(skb, IPVS_CMD_ATTR_SERVICE);
2626 if (!nl_service)
2627 return -EMSGSIZE;
2628
2629 NLA_PUT_U16(skb, IPVS_SVC_ATTR_AF, svc->af);
2630
2631 if (svc->fwmark) {
2632 NLA_PUT_U32(skb, IPVS_SVC_ATTR_FWMARK, svc->fwmark);
2633 } else {
2634 NLA_PUT_U16(skb, IPVS_SVC_ATTR_PROTOCOL, svc->protocol);
2635 NLA_PUT(skb, IPVS_SVC_ATTR_ADDR, sizeof(svc->addr), &svc->addr);
2636 NLA_PUT_U16(skb, IPVS_SVC_ATTR_PORT, svc->port);
2637 }
2638
2639 NLA_PUT_STRING(skb, IPVS_SVC_ATTR_SCHED_NAME, svc->scheduler->name);
2640 NLA_PUT(skb, IPVS_SVC_ATTR_FLAGS, sizeof(flags), &flags);
2641 NLA_PUT_U32(skb, IPVS_SVC_ATTR_TIMEOUT, svc->timeout / HZ);
2642 NLA_PUT_U32(skb, IPVS_SVC_ATTR_NETMASK, svc->netmask);
2643
2644 if (ip_vs_genl_fill_stats(skb, IPVS_SVC_ATTR_STATS, &svc->stats))
2645 goto nla_put_failure;
2646
2647 nla_nest_end(skb, nl_service);
2648
2649 return 0;
2650
2651 nla_put_failure:
2652 nla_nest_cancel(skb, nl_service);
2653 return -EMSGSIZE;
2654 }
2655
2656 static int ip_vs_genl_dump_service(struct sk_buff *skb,
2657 struct ip_vs_service *svc,
2658 struct netlink_callback *cb)
2659 {
2660 void *hdr;
2661
2662 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq,
2663 &ip_vs_genl_family, NLM_F_MULTI,
2664 IPVS_CMD_NEW_SERVICE);
2665 if (!hdr)
2666 return -EMSGSIZE;
2667
2668 if (ip_vs_genl_fill_service(skb, svc) < 0)
2669 goto nla_put_failure;
2670
2671 return genlmsg_end(skb, hdr);
2672
2673 nla_put_failure:
2674 genlmsg_cancel(skb, hdr);
2675 return -EMSGSIZE;
2676 }
2677
2678 static int ip_vs_genl_dump_services(struct sk_buff *skb,
2679 struct netlink_callback *cb)
2680 {
2681 int idx = 0, i;
2682 int start = cb->args[0];
2683 struct ip_vs_service *svc;
2684
2685 mutex_lock(&__ip_vs_mutex);
2686 for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) {
2687 list_for_each_entry(svc, &ip_vs_svc_table[i], s_list) {
2688 if (++idx <= start)
2689 continue;
2690 if (ip_vs_genl_dump_service(skb, svc, cb) < 0) {
2691 idx--;
2692 goto nla_put_failure;
2693 }
2694 }
2695 }
2696
2697 for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) {
2698 list_for_each_entry(svc, &ip_vs_svc_fwm_table[i], f_list) {
2699 if (++idx <= start)
2700 continue;
2701 if (ip_vs_genl_dump_service(skb, svc, cb) < 0) {
2702 idx--;
2703 goto nla_put_failure;
2704 }
2705 }
2706 }
2707
2708 nla_put_failure:
2709 mutex_unlock(&__ip_vs_mutex);
2710 cb->args[0] = idx;
2711
2712 return skb->len;
2713 }
2714
2715 static int ip_vs_genl_parse_service(struct ip_vs_service_user_kern *usvc,
2716 struct nlattr *nla, int full_entry)
2717 {
2718 struct nlattr *attrs[IPVS_SVC_ATTR_MAX + 1];
2719 struct nlattr *nla_af, *nla_port, *nla_fwmark, *nla_protocol, *nla_addr;
2720
2721 /* Parse mandatory identifying service fields first */
2722 if (nla == NULL ||
2723 nla_parse_nested(attrs, IPVS_SVC_ATTR_MAX, nla, ip_vs_svc_policy))
2724 return -EINVAL;
2725
2726 nla_af = attrs[IPVS_SVC_ATTR_AF];
2727 nla_protocol = attrs[IPVS_SVC_ATTR_PROTOCOL];
2728 nla_addr = attrs[IPVS_SVC_ATTR_ADDR];
2729 nla_port = attrs[IPVS_SVC_ATTR_PORT];
2730 nla_fwmark = attrs[IPVS_SVC_ATTR_FWMARK];
2731
2732 if (!(nla_af && (nla_fwmark || (nla_port && nla_protocol && nla_addr))))
2733 return -EINVAL;
2734
2735 memset(usvc, 0, sizeof(*usvc));
2736
2737 usvc->af = nla_get_u16(nla_af);
2738 #ifdef CONFIG_IP_VS_IPV6
2739 if (usvc->af != AF_INET && usvc->af != AF_INET6)
2740 #else
2741 if (usvc->af != AF_INET)
2742 #endif
2743 return -EAFNOSUPPORT;
2744
2745 if (nla_fwmark) {
2746 usvc->protocol = IPPROTO_TCP;
2747 usvc->fwmark = nla_get_u32(nla_fwmark);
2748 } else {
2749 usvc->protocol = nla_get_u16(nla_protocol);
2750 nla_memcpy(&usvc->addr, nla_addr, sizeof(usvc->addr));
2751 usvc->port = nla_get_u16(nla_port);
2752 usvc->fwmark = 0;
2753 }
2754
2755 /* If a full entry was requested, check for the additional fields */
2756 if (full_entry) {
2757 struct nlattr *nla_sched, *nla_flags, *nla_timeout,
2758 *nla_netmask;
2759 struct ip_vs_flags flags;
2760 struct ip_vs_service *svc;
2761
2762 nla_sched = attrs[IPVS_SVC_ATTR_SCHED_NAME];
2763 nla_flags = attrs[IPVS_SVC_ATTR_FLAGS];
2764 nla_timeout = attrs[IPVS_SVC_ATTR_TIMEOUT];
2765 nla_netmask = attrs[IPVS_SVC_ATTR_NETMASK];
2766
2767 if (!(nla_sched && nla_flags && nla_timeout && nla_netmask))
2768 return -EINVAL;
2769
2770 nla_memcpy(&flags, nla_flags, sizeof(flags));
2771
2772 /* prefill flags from service if it already exists */
2773 if (usvc->fwmark)
2774 svc = __ip_vs_svc_fwm_get(usvc->af, usvc->fwmark);
2775 else
2776 svc = __ip_vs_service_get(usvc->af, usvc->protocol,
2777 &usvc->addr, usvc->port);
2778 if (svc) {
2779 usvc->flags = svc->flags;
2780 ip_vs_service_put(svc);
2781 } else
2782 usvc->flags = 0;
2783
2784 /* set new flags from userland */
2785 usvc->flags = (usvc->flags & ~flags.mask) |
2786 (flags.flags & flags.mask);
2787 usvc->sched_name = nla_data(nla_sched);
2788 usvc->timeout = nla_get_u32(nla_timeout);
2789 usvc->netmask = nla_get_u32(nla_netmask);
2790 }
2791
2792 return 0;
2793 }
2794
2795 static struct ip_vs_service *ip_vs_genl_find_service(struct nlattr *nla)
2796 {
2797 struct ip_vs_service_user_kern usvc;
2798 int ret;
2799
2800 ret = ip_vs_genl_parse_service(&usvc, nla, 0);
2801 if (ret)
2802 return ERR_PTR(ret);
2803
2804 if (usvc.fwmark)
2805 return __ip_vs_svc_fwm_get(usvc.af, usvc.fwmark);
2806 else
2807 return __ip_vs_service_get(usvc.af, usvc.protocol,
2808 &usvc.addr, usvc.port);
2809 }
2810
2811 static int ip_vs_genl_fill_dest(struct sk_buff *skb, struct ip_vs_dest *dest)
2812 {
2813 struct nlattr *nl_dest;
2814
2815 nl_dest = nla_nest_start(skb, IPVS_CMD_ATTR_DEST);
2816 if (!nl_dest)
2817 return -EMSGSIZE;
2818
2819 NLA_PUT(skb, IPVS_DEST_ATTR_ADDR, sizeof(dest->addr), &dest->addr);
2820 NLA_PUT_U16(skb, IPVS_DEST_ATTR_PORT, dest->port);
2821
2822 NLA_PUT_U32(skb, IPVS_DEST_ATTR_FWD_METHOD,
2823 atomic_read(&dest->conn_flags) & IP_VS_CONN_F_FWD_MASK);
2824 NLA_PUT_U32(skb, IPVS_DEST_ATTR_WEIGHT, atomic_read(&dest->weight));
2825 NLA_PUT_U32(skb, IPVS_DEST_ATTR_U_THRESH, dest->u_threshold);
2826 NLA_PUT_U32(skb, IPVS_DEST_ATTR_L_THRESH, dest->l_threshold);
2827 NLA_PUT_U32(skb, IPVS_DEST_ATTR_ACTIVE_CONNS,
2828 atomic_read(&dest->activeconns));
2829 NLA_PUT_U32(skb, IPVS_DEST_ATTR_INACT_CONNS,
2830 atomic_read(&dest->inactconns));
2831 NLA_PUT_U32(skb, IPVS_DEST_ATTR_PERSIST_CONNS,
2832 atomic_read(&dest->persistconns));
2833
2834 if (ip_vs_genl_fill_stats(skb, IPVS_DEST_ATTR_STATS, &dest->stats))
2835 goto nla_put_failure;
2836
2837 nla_nest_end(skb, nl_dest);
2838
2839 return 0;
2840
2841 nla_put_failure:
2842 nla_nest_cancel(skb, nl_dest);
2843 return -EMSGSIZE;
2844 }
2845
2846 static int ip_vs_genl_dump_dest(struct sk_buff *skb, struct ip_vs_dest *dest,
2847 struct netlink_callback *cb)
2848 {
2849 void *hdr;
2850
2851 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq,
2852 &ip_vs_genl_family, NLM_F_MULTI,
2853 IPVS_CMD_NEW_DEST);
2854 if (!hdr)
2855 return -EMSGSIZE;
2856
2857 if (ip_vs_genl_fill_dest(skb, dest) < 0)
2858 goto nla_put_failure;
2859
2860 return genlmsg_end(skb, hdr);
2861
2862 nla_put_failure:
2863 genlmsg_cancel(skb, hdr);
2864 return -EMSGSIZE;
2865 }
2866
2867 static int ip_vs_genl_dump_dests(struct sk_buff *skb,
2868 struct netlink_callback *cb)
2869 {
2870 int idx = 0;
2871 int start = cb->args[0];
2872 struct ip_vs_service *svc;
2873 struct ip_vs_dest *dest;
2874 struct nlattr *attrs[IPVS_CMD_ATTR_MAX + 1];
2875
2876 mutex_lock(&__ip_vs_mutex);
2877
2878 /* Try to find the service for which to dump destinations */
2879 if (nlmsg_parse(cb->nlh, GENL_HDRLEN, attrs,
2880 IPVS_CMD_ATTR_MAX, ip_vs_cmd_policy))
2881 goto out_err;
2882
2883 svc = ip_vs_genl_find_service(attrs[IPVS_CMD_ATTR_SERVICE]);
2884 if (IS_ERR(svc) || svc == NULL)
2885 goto out_err;
2886
2887 /* Dump the destinations */
2888 list_for_each_entry(dest, &svc->destinations, n_list) {
2889 if (++idx <= start)
2890 continue;
2891 if (ip_vs_genl_dump_dest(skb, dest, cb) < 0) {
2892 idx--;
2893 goto nla_put_failure;
2894 }
2895 }
2896
2897 nla_put_failure:
2898 cb->args[0] = idx;
2899 ip_vs_service_put(svc);
2900
2901 out_err:
2902 mutex_unlock(&__ip_vs_mutex);
2903
2904 return skb->len;
2905 }
2906
2907 static int ip_vs_genl_parse_dest(struct ip_vs_dest_user_kern *udest,
2908 struct nlattr *nla, int full_entry)
2909 {
2910 struct nlattr *attrs[IPVS_DEST_ATTR_MAX + 1];
2911 struct nlattr *nla_addr, *nla_port;
2912
2913 /* Parse mandatory identifying destination fields first */
2914 if (nla == NULL ||
2915 nla_parse_nested(attrs, IPVS_DEST_ATTR_MAX, nla, ip_vs_dest_policy))
2916 return -EINVAL;
2917
2918 nla_addr = attrs[IPVS_DEST_ATTR_ADDR];
2919 nla_port = attrs[IPVS_DEST_ATTR_PORT];
2920
2921 if (!(nla_addr && nla_port))
2922 return -EINVAL;
2923
2924 memset(udest, 0, sizeof(*udest));
2925
2926 nla_memcpy(&udest->addr, nla_addr, sizeof(udest->addr));
2927 udest->port = nla_get_u16(nla_port);
2928
2929 /* If a full entry was requested, check for the additional fields */
2930 if (full_entry) {
2931 struct nlattr *nla_fwd, *nla_weight, *nla_u_thresh,
2932 *nla_l_thresh;
2933
2934 nla_fwd = attrs[IPVS_DEST_ATTR_FWD_METHOD];
2935 nla_weight = attrs[IPVS_DEST_ATTR_WEIGHT];
2936 nla_u_thresh = attrs[IPVS_DEST_ATTR_U_THRESH];
2937 nla_l_thresh = attrs[IPVS_DEST_ATTR_L_THRESH];
2938
2939 if (!(nla_fwd && nla_weight && nla_u_thresh && nla_l_thresh))
2940 return -EINVAL;
2941
2942 udest->conn_flags = nla_get_u32(nla_fwd)
2943 & IP_VS_CONN_F_FWD_MASK;
2944 udest->weight = nla_get_u32(nla_weight);
2945 udest->u_threshold = nla_get_u32(nla_u_thresh);
2946 udest->l_threshold = nla_get_u32(nla_l_thresh);
2947 }
2948
2949 return 0;
2950 }
2951
2952 static int ip_vs_genl_fill_daemon(struct sk_buff *skb, __be32 state,
2953 const char *mcast_ifn, __be32 syncid)
2954 {
2955 struct nlattr *nl_daemon;
2956
2957 nl_daemon = nla_nest_start(skb, IPVS_CMD_ATTR_DAEMON);
2958 if (!nl_daemon)
2959 return -EMSGSIZE;
2960
2961 NLA_PUT_U32(skb, IPVS_DAEMON_ATTR_STATE, state);
2962 NLA_PUT_STRING(skb, IPVS_DAEMON_ATTR_MCAST_IFN, mcast_ifn);
2963 NLA_PUT_U32(skb, IPVS_DAEMON_ATTR_SYNC_ID, syncid);
2964
2965 nla_nest_end(skb, nl_daemon);
2966
2967 return 0;
2968
2969 nla_put_failure:
2970 nla_nest_cancel(skb, nl_daemon);
2971 return -EMSGSIZE;
2972 }
2973
2974 static int ip_vs_genl_dump_daemon(struct sk_buff *skb, __be32 state,
2975 const char *mcast_ifn, __be32 syncid,
2976 struct netlink_callback *cb)
2977 {
2978 void *hdr;
2979 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq,
2980 &ip_vs_genl_family, NLM_F_MULTI,
2981 IPVS_CMD_NEW_DAEMON);
2982 if (!hdr)
2983 return -EMSGSIZE;
2984
2985 if (ip_vs_genl_fill_daemon(skb, state, mcast_ifn, syncid))
2986 goto nla_put_failure;
2987
2988 return genlmsg_end(skb, hdr);
2989
2990 nla_put_failure:
2991 genlmsg_cancel(skb, hdr);
2992 return -EMSGSIZE;
2993 }
2994
2995 static int ip_vs_genl_dump_daemons(struct sk_buff *skb,
2996 struct netlink_callback *cb)
2997 {
2998 mutex_lock(&__ip_vs_mutex);
2999 if ((ip_vs_sync_state & IP_VS_STATE_MASTER) && !cb->args[0]) {
3000 if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_MASTER,
3001 ip_vs_master_mcast_ifn,
3002 ip_vs_master_syncid, cb) < 0)
3003 goto nla_put_failure;
3004
3005 cb->args[0] = 1;
3006 }
3007
3008 if ((ip_vs_sync_state & IP_VS_STATE_BACKUP) && !cb->args[1]) {
3009 if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_BACKUP,
3010 ip_vs_backup_mcast_ifn,
3011 ip_vs_backup_syncid, cb) < 0)
3012 goto nla_put_failure;
3013
3014 cb->args[1] = 1;
3015 }
3016
3017 nla_put_failure:
3018 mutex_unlock(&__ip_vs_mutex);
3019
3020 return skb->len;
3021 }
3022
3023 static int ip_vs_genl_new_daemon(struct nlattr **attrs)
3024 {
3025 if (!(attrs[IPVS_DAEMON_ATTR_STATE] &&
3026 attrs[IPVS_DAEMON_ATTR_MCAST_IFN] &&
3027 attrs[IPVS_DAEMON_ATTR_SYNC_ID]))
3028 return -EINVAL;
3029
3030 return start_sync_thread(nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]),
3031 nla_data(attrs[IPVS_DAEMON_ATTR_MCAST_IFN]),
3032 nla_get_u32(attrs[IPVS_DAEMON_ATTR_SYNC_ID]));
3033 }
3034
3035 static int ip_vs_genl_del_daemon(struct nlattr **attrs)
3036 {
3037 if (!attrs[IPVS_DAEMON_ATTR_STATE])
3038 return -EINVAL;
3039
3040 return stop_sync_thread(nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]));
3041 }
3042
3043 static int ip_vs_genl_set_config(struct nlattr **attrs)
3044 {
3045 struct ip_vs_timeout_user t;
3046
3047 __ip_vs_get_timeouts(&t);
3048
3049 if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP])
3050 t.tcp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP]);
3051
3052 if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN])
3053 t.tcp_fin_timeout =
3054 nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN]);
3055
3056 if (attrs[IPVS_CMD_ATTR_TIMEOUT_UDP])
3057 t.udp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_UDP]);
3058
3059 return ip_vs_set_timeout(&t);
3060 }
3061
3062 static int ip_vs_genl_set_cmd(struct sk_buff *skb, struct genl_info *info)
3063 {
3064 struct ip_vs_service *svc = NULL;
3065 struct ip_vs_service_user_kern usvc;
3066 struct ip_vs_dest_user_kern udest;
3067 int ret = 0, cmd;
3068 int need_full_svc = 0, need_full_dest = 0;
3069
3070 cmd = info->genlhdr->cmd;
3071
3072 mutex_lock(&__ip_vs_mutex);
3073
3074 if (cmd == IPVS_CMD_FLUSH) {
3075 ret = ip_vs_flush();
3076 goto out;
3077 } else if (cmd == IPVS_CMD_SET_CONFIG) {
3078 ret = ip_vs_genl_set_config(info->attrs);
3079 goto out;
3080 } else if (cmd == IPVS_CMD_NEW_DAEMON ||
3081 cmd == IPVS_CMD_DEL_DAEMON) {
3082
3083 struct nlattr *daemon_attrs[IPVS_DAEMON_ATTR_MAX + 1];
3084
3085 if (!info->attrs[IPVS_CMD_ATTR_DAEMON] ||
3086 nla_parse_nested(daemon_attrs, IPVS_DAEMON_ATTR_MAX,
3087 info->attrs[IPVS_CMD_ATTR_DAEMON],
3088 ip_vs_daemon_policy)) {
3089 ret = -EINVAL;
3090 goto out;
3091 }
3092
3093 if (cmd == IPVS_CMD_NEW_DAEMON)
3094 ret = ip_vs_genl_new_daemon(daemon_attrs);
3095 else
3096 ret = ip_vs_genl_del_daemon(daemon_attrs);
3097 goto out;
3098 } else if (cmd == IPVS_CMD_ZERO &&
3099 !info->attrs[IPVS_CMD_ATTR_SERVICE]) {
3100 ret = ip_vs_zero_all();
3101 goto out;
3102 }
3103
3104 /* All following commands require a service argument, so check if we
3105 * received a valid one. We need a full service specification when
3106 * adding / editing a service. Only identifying members otherwise. */
3107 if (cmd == IPVS_CMD_NEW_SERVICE || cmd == IPVS_CMD_SET_SERVICE)
3108 need_full_svc = 1;
3109
3110 ret = ip_vs_genl_parse_service(&usvc,
3111 info->attrs[IPVS_CMD_ATTR_SERVICE],
3112 need_full_svc);
3113 if (ret)
3114 goto out;
3115
3116 /* Lookup the exact service by <protocol, addr, port> or fwmark */
3117 if (usvc.fwmark == 0)
3118 svc = __ip_vs_service_get(usvc.af, usvc.protocol,
3119 &usvc.addr, usvc.port);
3120 else
3121 svc = __ip_vs_svc_fwm_get(usvc.af, usvc.fwmark);
3122
3123 /* Unless we're adding a new service, the service must already exist */
3124 if ((cmd != IPVS_CMD_NEW_SERVICE) && (svc == NULL)) {
3125 ret = -ESRCH;
3126 goto out;
3127 }
3128
3129 /* Destination commands require a valid destination argument. For
3130 * adding / editing a destination, we need a full destination
3131 * specification. */
3132 if (cmd == IPVS_CMD_NEW_DEST || cmd == IPVS_CMD_SET_DEST ||
3133 cmd == IPVS_CMD_DEL_DEST) {
3134 if (cmd != IPVS_CMD_DEL_DEST)
3135 need_full_dest = 1;
3136
3137 ret = ip_vs_genl_parse_dest(&udest,
3138 info->attrs[IPVS_CMD_ATTR_DEST],
3139 need_full_dest);
3140 if (ret)
3141 goto out;
3142 }
3143
3144 switch (cmd) {
3145 case IPVS_CMD_NEW_SERVICE:
3146 if (svc == NULL)
3147 ret = ip_vs_add_service(&usvc, &svc);
3148 else
3149 ret = -EEXIST;
3150 break;
3151 case IPVS_CMD_SET_SERVICE:
3152 ret = ip_vs_edit_service(svc, &usvc);
3153 break;
3154 case IPVS_CMD_DEL_SERVICE:
3155 ret = ip_vs_del_service(svc);
3156 break;
3157 case IPVS_CMD_NEW_DEST:
3158 ret = ip_vs_add_dest(svc, &udest);
3159 break;
3160 case IPVS_CMD_SET_DEST:
3161 ret = ip_vs_edit_dest(svc, &udest);
3162 break;
3163 case IPVS_CMD_DEL_DEST:
3164 ret = ip_vs_del_dest(svc, &udest);
3165 break;
3166 case IPVS_CMD_ZERO:
3167 ret = ip_vs_zero_service(svc);
3168 break;
3169 default:
3170 ret = -EINVAL;
3171 }
3172
3173 out:
3174 if (svc)
3175 ip_vs_service_put(svc);
3176 mutex_unlock(&__ip_vs_mutex);
3177
3178 return ret;
3179 }
3180
3181 static int ip_vs_genl_get_cmd(struct sk_buff *skb, struct genl_info *info)
3182 {
3183 struct sk_buff *msg;
3184 void *reply;
3185 int ret, cmd, reply_cmd;
3186
3187 cmd = info->genlhdr->cmd;
3188
3189 if (cmd == IPVS_CMD_GET_SERVICE)
3190 reply_cmd = IPVS_CMD_NEW_SERVICE;
3191 else if (cmd == IPVS_CMD_GET_INFO)
3192 reply_cmd = IPVS_CMD_SET_INFO;
3193 else if (cmd == IPVS_CMD_GET_CONFIG)
3194 reply_cmd = IPVS_CMD_SET_CONFIG;
3195 else {
3196 pr_err("unknown Generic Netlink command\n");
3197 return -EINVAL;
3198 }
3199
3200 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3201 if (!msg)
3202 return -ENOMEM;
3203
3204 mutex_lock(&__ip_vs_mutex);
3205
3206 reply = genlmsg_put_reply(msg, info, &ip_vs_genl_family, 0, reply_cmd);
3207 if (reply == NULL)
3208 goto nla_put_failure;
3209
3210 switch (cmd) {
3211 case IPVS_CMD_GET_SERVICE:
3212 {
3213 struct ip_vs_service *svc;
3214
3215 svc = ip_vs_genl_find_service(info->attrs[IPVS_CMD_ATTR_SERVICE]);
3216 if (IS_ERR(svc)) {
3217 ret = PTR_ERR(svc);
3218 goto out_err;
3219 } else if (svc) {
3220 ret = ip_vs_genl_fill_service(msg, svc);
3221 ip_vs_service_put(svc);
3222 if (ret)
3223 goto nla_put_failure;
3224 } else {
3225 ret = -ESRCH;
3226 goto out_err;
3227 }
3228
3229 break;
3230 }
3231
3232 case IPVS_CMD_GET_CONFIG:
3233 {
3234 struct ip_vs_timeout_user t;
3235
3236 __ip_vs_get_timeouts(&t);
3237 #ifdef CONFIG_IP_VS_PROTO_TCP
3238 NLA_PUT_U32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP, t.tcp_timeout);
3239 NLA_PUT_U32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP_FIN,
3240 t.tcp_fin_timeout);
3241 #endif
3242 #ifdef CONFIG_IP_VS_PROTO_UDP
3243 NLA_PUT_U32(msg, IPVS_CMD_ATTR_TIMEOUT_UDP, t.udp_timeout);
3244 #endif
3245
3246 break;
3247 }
3248
3249 case IPVS_CMD_GET_INFO:
3250 NLA_PUT_U32(msg, IPVS_INFO_ATTR_VERSION, IP_VS_VERSION_CODE);
3251 NLA_PUT_U32(msg, IPVS_INFO_ATTR_CONN_TAB_SIZE,
3252 ip_vs_conn_tab_size);
3253 break;
3254 }
3255
3256 genlmsg_end(msg, reply);
3257 ret = genlmsg_reply(msg, info);
3258 goto out;
3259
3260 nla_put_failure:
3261 pr_err("not enough space in Netlink message\n");
3262 ret = -EMSGSIZE;
3263
3264 out_err:
3265 nlmsg_free(msg);
3266 out:
3267 mutex_unlock(&__ip_vs_mutex);
3268
3269 return ret;
3270 }
3271
3272
3273 static struct genl_ops ip_vs_genl_ops[] __read_mostly = {
3274 {
3275 .cmd = IPVS_CMD_NEW_SERVICE,
3276 .flags = GENL_ADMIN_PERM,
3277 .policy = ip_vs_cmd_policy,
3278 .doit = ip_vs_genl_set_cmd,
3279 },
3280 {
3281 .cmd = IPVS_CMD_SET_SERVICE,
3282 .flags = GENL_ADMIN_PERM,
3283 .policy = ip_vs_cmd_policy,
3284 .doit = ip_vs_genl_set_cmd,
3285 },
3286 {
3287 .cmd = IPVS_CMD_DEL_SERVICE,
3288 .flags = GENL_ADMIN_PERM,
3289 .policy = ip_vs_cmd_policy,
3290 .doit = ip_vs_genl_set_cmd,
3291 },
3292 {
3293 .cmd = IPVS_CMD_GET_SERVICE,
3294 .flags = GENL_ADMIN_PERM,
3295 .doit = ip_vs_genl_get_cmd,
3296 .dumpit = ip_vs_genl_dump_services,
3297 .policy = ip_vs_cmd_policy,
3298 },
3299 {
3300 .cmd = IPVS_CMD_NEW_DEST,
3301 .flags = GENL_ADMIN_PERM,
3302 .policy = ip_vs_cmd_policy,
3303 .doit = ip_vs_genl_set_cmd,
3304 },
3305 {
3306 .cmd = IPVS_CMD_SET_DEST,
3307 .flags = GENL_ADMIN_PERM,
3308 .policy = ip_vs_cmd_policy,
3309 .doit = ip_vs_genl_set_cmd,
3310 },
3311 {
3312 .cmd = IPVS_CMD_DEL_DEST,
3313 .flags = GENL_ADMIN_PERM,
3314 .policy = ip_vs_cmd_policy,
3315 .doit = ip_vs_genl_set_cmd,
3316 },
3317 {
3318 .cmd = IPVS_CMD_GET_DEST,
3319 .flags = GENL_ADMIN_PERM,
3320 .policy = ip_vs_cmd_policy,
3321 .dumpit = ip_vs_genl_dump_dests,
3322 },
3323 {
3324 .cmd = IPVS_CMD_NEW_DAEMON,
3325 .flags = GENL_ADMIN_PERM,
3326 .policy = ip_vs_cmd_policy,
3327 .doit = ip_vs_genl_set_cmd,
3328 },
3329 {
3330 .cmd = IPVS_CMD_DEL_DAEMON,
3331 .flags = GENL_ADMIN_PERM,
3332 .policy = ip_vs_cmd_policy,
3333 .doit = ip_vs_genl_set_cmd,
3334 },
3335 {
3336 .cmd = IPVS_CMD_GET_DAEMON,
3337 .flags = GENL_ADMIN_PERM,
3338 .dumpit = ip_vs_genl_dump_daemons,
3339 },
3340 {
3341 .cmd = IPVS_CMD_SET_CONFIG,
3342 .flags = GENL_ADMIN_PERM,
3343 .policy = ip_vs_cmd_policy,
3344 .doit = ip_vs_genl_set_cmd,
3345 },
3346 {
3347 .cmd = IPVS_CMD_GET_CONFIG,
3348 .flags = GENL_ADMIN_PERM,
3349 .doit = ip_vs_genl_get_cmd,
3350 },
3351 {
3352 .cmd = IPVS_CMD_GET_INFO,
3353 .flags = GENL_ADMIN_PERM,
3354 .doit = ip_vs_genl_get_cmd,
3355 },
3356 {
3357 .cmd = IPVS_CMD_ZERO,
3358 .flags = GENL_ADMIN_PERM,
3359 .policy = ip_vs_cmd_policy,
3360 .doit = ip_vs_genl_set_cmd,
3361 },
3362 {
3363 .cmd = IPVS_CMD_FLUSH,
3364 .flags = GENL_ADMIN_PERM,
3365 .doit = ip_vs_genl_set_cmd,
3366 },
3367 };
3368
3369 static int __init ip_vs_genl_register(void)
3370 {
3371 return genl_register_family_with_ops(&ip_vs_genl_family,
3372 ip_vs_genl_ops, ARRAY_SIZE(ip_vs_genl_ops));
3373 }
3374
3375 static void ip_vs_genl_unregister(void)
3376 {
3377 genl_unregister_family(&ip_vs_genl_family);
3378 }
3379
3380 /* End of Generic Netlink interface definitions */
3381
3382
3383 int __init ip_vs_control_init(void)
3384 {
3385 int ret;
3386 int idx;
3387
3388 EnterFunction(2);
3389
3390 ret = nf_register_sockopt(&ip_vs_sockopts);
3391 if (ret) {
3392 pr_err("cannot register sockopt.\n");
3393 return ret;
3394 }
3395
3396 ret = ip_vs_genl_register();
3397 if (ret) {
3398 pr_err("cannot register Generic Netlink interface.\n");
3399 nf_unregister_sockopt(&ip_vs_sockopts);
3400 return ret;
3401 }
3402
3403 proc_net_fops_create(&init_net, "ip_vs", 0, &ip_vs_info_fops);
3404 proc_net_fops_create(&init_net, "ip_vs_stats",0, &ip_vs_stats_fops);
3405
3406 sysctl_header = register_sysctl_paths(net_vs_ctl_path, vs_vars);
3407
3408 /* Initialize ip_vs_svc_table, ip_vs_svc_fwm_table, ip_vs_rtable */
3409 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
3410 INIT_LIST_HEAD(&ip_vs_svc_table[idx]);
3411 INIT_LIST_HEAD(&ip_vs_svc_fwm_table[idx]);
3412 }
3413 for(idx = 0; idx < IP_VS_RTAB_SIZE; idx++) {
3414 INIT_LIST_HEAD(&ip_vs_rtable[idx]);
3415 }
3416
3417 ip_vs_new_estimator(&ip_vs_stats);
3418
3419 /* Hook the defense timer */
3420 schedule_delayed_work(&defense_work, DEFENSE_TIMER_PERIOD);
3421
3422 LeaveFunction(2);
3423 return 0;
3424 }
3425
3426
3427 void ip_vs_control_cleanup(void)
3428 {
3429 EnterFunction(2);
3430 ip_vs_trash_cleanup();
3431 cancel_rearming_delayed_work(&defense_work);
3432 cancel_work_sync(&defense_work.work);
3433 ip_vs_kill_estimator(&ip_vs_stats);
3434 unregister_sysctl_table(sysctl_header);
3435 proc_net_remove(&init_net, "ip_vs_stats");
3436 proc_net_remove(&init_net, "ip_vs");
3437 ip_vs_genl_unregister();
3438 nf_unregister_sockopt(&ip_vs_sockopts);
3439 LeaveFunction(2);
3440 }
kernel source for telekom puls (alcatel/mediatek)