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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs...
[linux-block.git] / net / netfilter / ipvs / ip_vs_ctl.c
... / ...
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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
35#include <linux/netfilter.h>
36#include <linux/netfilter_ipv4.h>
37#include <linux/mutex.h>
38
39#include <net/net_namespace.h>
40#include <net/ip.h>
41#ifdef CONFIG_IP_VS_IPV6
42#include <net/ipv6.h>
43#include <net/ip6_route.h>
44#endif
45#include <net/route.h>
46#include <net/sock.h>
47#include <net/genetlink.h>
48
49#include <asm/uaccess.h>
50
51#include <net/ip_vs.h>
52
53/* semaphore for IPVS sockopts. And, [gs]etsockopt may sleep. */
54static DEFINE_MUTEX(__ip_vs_mutex);
55
56/* lock for service table */
57static DEFINE_RWLOCK(__ip_vs_svc_lock);
58
59/* lock for table with the real services */
60static DEFINE_RWLOCK(__ip_vs_rs_lock);
61
62/* lock for state and timeout tables */
63static DEFINE_RWLOCK(__ip_vs_securetcp_lock);
64
65/* lock for drop entry handling */
66static DEFINE_SPINLOCK(__ip_vs_dropentry_lock);
67
68/* lock for drop packet handling */
69static DEFINE_SPINLOCK(__ip_vs_droppacket_lock);
70
71/* 1/rate drop and drop-entry variables */
72int ip_vs_drop_rate = 0;
73int ip_vs_drop_counter = 0;
74static atomic_t ip_vs_dropentry = ATOMIC_INIT(0);
75
76/* number of virtual services */
77static int ip_vs_num_services = 0;
78
79/* sysctl variables */
80static int sysctl_ip_vs_drop_entry = 0;
81static int sysctl_ip_vs_drop_packet = 0;
82static int sysctl_ip_vs_secure_tcp = 0;
83static int sysctl_ip_vs_amemthresh = 1024;
84static int sysctl_ip_vs_am_droprate = 10;
85int sysctl_ip_vs_cache_bypass = 0;
86int sysctl_ip_vs_expire_nodest_conn = 0;
87int sysctl_ip_vs_expire_quiescent_template = 0;
88int sysctl_ip_vs_sync_threshold[2] = { 3, 50 };
89int sysctl_ip_vs_nat_icmp_send = 0;
90
91
92#ifdef CONFIG_IP_VS_DEBUG
93static int sysctl_ip_vs_debug_level = 0;
94
95int ip_vs_get_debug_level(void)
96{
97 return sysctl_ip_vs_debug_level;
98}
99#endif
100
101#ifdef CONFIG_IP_VS_IPV6
102/* Taken from rt6_fill_node() in net/ipv6/route.c, is there a better way? */
103static int __ip_vs_addr_is_local_v6(const struct in6_addr *addr)
104{
105 struct rt6_info *rt;
106 struct flowi fl = {
107 .oif = 0,
108 .nl_u = {
109 .ip6_u = {
110 .daddr = *addr,
111 .saddr = { .s6_addr32 = {0, 0, 0, 0} }, } },
112 };
113
114 rt = (struct rt6_info *)ip6_route_output(&init_net, NULL, &fl);
115 if (rt && rt->rt6i_dev && (rt->rt6i_dev->flags & IFF_LOOPBACK))
116 return 1;
117
118 return 0;
119}
120#endif
121/*
122 * update_defense_level is called from keventd and from sysctl,
123 * so it needs to protect itself from softirqs
124 */
125static void update_defense_level(void)
126{
127 struct sysinfo i;
128 static int old_secure_tcp = 0;
129 int availmem;
130 int nomem;
131 int to_change = -1;
132
133 /* we only count free and buffered memory (in pages) */
134 si_meminfo(&i);
135 availmem = i.freeram + i.bufferram;
136 /* however in linux 2.5 the i.bufferram is total page cache size,
137 we need adjust it */
138 /* si_swapinfo(&i); */
139 /* availmem = availmem - (i.totalswap - i.freeswap); */
140
141 nomem = (availmem < sysctl_ip_vs_amemthresh);
142
143 local_bh_disable();
144
145 /* drop_entry */
146 spin_lock(&__ip_vs_dropentry_lock);
147 switch (sysctl_ip_vs_drop_entry) {
148 case 0:
149 atomic_set(&ip_vs_dropentry, 0);
150 break;
151 case 1:
152 if (nomem) {
153 atomic_set(&ip_vs_dropentry, 1);
154 sysctl_ip_vs_drop_entry = 2;
155 } else {
156 atomic_set(&ip_vs_dropentry, 0);
157 }
158 break;
159 case 2:
160 if (nomem) {
161 atomic_set(&ip_vs_dropentry, 1);
162 } else {
163 atomic_set(&ip_vs_dropentry, 0);
164 sysctl_ip_vs_drop_entry = 1;
165 };
166 break;
167 case 3:
168 atomic_set(&ip_vs_dropentry, 1);
169 break;
170 }
171 spin_unlock(&__ip_vs_dropentry_lock);
172
173 /* drop_packet */
174 spin_lock(&__ip_vs_droppacket_lock);
175 switch (sysctl_ip_vs_drop_packet) {
176 case 0:
177 ip_vs_drop_rate = 0;
178 break;
179 case 1:
180 if (nomem) {
181 ip_vs_drop_rate = ip_vs_drop_counter
182 = sysctl_ip_vs_amemthresh /
183 (sysctl_ip_vs_amemthresh-availmem);
184 sysctl_ip_vs_drop_packet = 2;
185 } else {
186 ip_vs_drop_rate = 0;
187 }
188 break;
189 case 2:
190 if (nomem) {
191 ip_vs_drop_rate = ip_vs_drop_counter
192 = sysctl_ip_vs_amemthresh /
193 (sysctl_ip_vs_amemthresh-availmem);
194 } else {
195 ip_vs_drop_rate = 0;
196 sysctl_ip_vs_drop_packet = 1;
197 }
198 break;
199 case 3:
200 ip_vs_drop_rate = sysctl_ip_vs_am_droprate;
201 break;
202 }
203 spin_unlock(&__ip_vs_droppacket_lock);
204
205 /* secure_tcp */
206 write_lock(&__ip_vs_securetcp_lock);
207 switch (sysctl_ip_vs_secure_tcp) {
208 case 0:
209 if (old_secure_tcp >= 2)
210 to_change = 0;
211 break;
212 case 1:
213 if (nomem) {
214 if (old_secure_tcp < 2)
215 to_change = 1;
216 sysctl_ip_vs_secure_tcp = 2;
217 } else {
218 if (old_secure_tcp >= 2)
219 to_change = 0;
220 }
221 break;
222 case 2:
223 if (nomem) {
224 if (old_secure_tcp < 2)
225 to_change = 1;
226 } else {
227 if (old_secure_tcp >= 2)
228 to_change = 0;
229 sysctl_ip_vs_secure_tcp = 1;
230 }
231 break;
232 case 3:
233 if (old_secure_tcp < 2)
234 to_change = 1;
235 break;
236 }
237 old_secure_tcp = sysctl_ip_vs_secure_tcp;
238 if (to_change >= 0)
239 ip_vs_protocol_timeout_change(sysctl_ip_vs_secure_tcp>1);
240 write_unlock(&__ip_vs_securetcp_lock);
241
242 local_bh_enable();
243}
244
245
246/*
247 * Timer for checking the defense
248 */
249#define DEFENSE_TIMER_PERIOD 1*HZ
250static void defense_work_handler(struct work_struct *work);
251static DECLARE_DELAYED_WORK(defense_work, defense_work_handler);
252
253static void defense_work_handler(struct work_struct *work)
254{
255 update_defense_level();
256 if (atomic_read(&ip_vs_dropentry))
257 ip_vs_random_dropentry();
258
259 schedule_delayed_work(&defense_work, DEFENSE_TIMER_PERIOD);
260}
261
262int
263ip_vs_use_count_inc(void)
264{
265 return try_module_get(THIS_MODULE);
266}
267
268void
269ip_vs_use_count_dec(void)
270{
271 module_put(THIS_MODULE);
272}
273
274
275/*
276 * Hash table: for virtual service lookups
277 */
278#define IP_VS_SVC_TAB_BITS 8
279#define IP_VS_SVC_TAB_SIZE (1 << IP_VS_SVC_TAB_BITS)
280#define IP_VS_SVC_TAB_MASK (IP_VS_SVC_TAB_SIZE - 1)
281
282/* the service table hashed by <protocol, addr, port> */
283static struct list_head ip_vs_svc_table[IP_VS_SVC_TAB_SIZE];
284/* the service table hashed by fwmark */
285static struct list_head ip_vs_svc_fwm_table[IP_VS_SVC_TAB_SIZE];
286
287/*
288 * Hash table: for real service lookups
289 */
290#define IP_VS_RTAB_BITS 4
291#define IP_VS_RTAB_SIZE (1 << IP_VS_RTAB_BITS)
292#define IP_VS_RTAB_MASK (IP_VS_RTAB_SIZE - 1)
293
294static struct list_head ip_vs_rtable[IP_VS_RTAB_SIZE];
295
296/*
297 * Trash for destinations
298 */
299static LIST_HEAD(ip_vs_dest_trash);
300
301/*
302 * FTP & NULL virtual service counters
303 */
304static atomic_t ip_vs_ftpsvc_counter = ATOMIC_INIT(0);
305static atomic_t ip_vs_nullsvc_counter = ATOMIC_INIT(0);
306
307
308/*
309 * Returns hash value for virtual service
310 */
311static __inline__ unsigned
312ip_vs_svc_hashkey(int af, unsigned proto, const union nf_inet_addr *addr,
313 __be16 port)
314{
315 register unsigned porth = ntohs(port);
316 __be32 addr_fold = addr->ip;
317
318#ifdef CONFIG_IP_VS_IPV6
319 if (af == AF_INET6)
320 addr_fold = addr->ip6[0]^addr->ip6[1]^
321 addr->ip6[2]^addr->ip6[3];
322#endif
323
324 return (proto^ntohl(addr_fold)^(porth>>IP_VS_SVC_TAB_BITS)^porth)
325 & IP_VS_SVC_TAB_MASK;
326}
327
328/*
329 * Returns hash value of fwmark for virtual service lookup
330 */
331static __inline__ unsigned ip_vs_svc_fwm_hashkey(__u32 fwmark)
332{
333 return fwmark & IP_VS_SVC_TAB_MASK;
334}
335
336/*
337 * Hashes a service in the ip_vs_svc_table by <proto,addr,port>
338 * or in the ip_vs_svc_fwm_table by fwmark.
339 * Should be called with locked tables.
340 */
341static int ip_vs_svc_hash(struct ip_vs_service *svc)
342{
343 unsigned hash;
344
345 if (svc->flags & IP_VS_SVC_F_HASHED) {
346 pr_err("%s(): request for already hashed, called from %pF\n",
347 __func__, __builtin_return_address(0));
348 return 0;
349 }
350
351 if (svc->fwmark == 0) {
352 /*
353 * Hash it by <protocol,addr,port> in ip_vs_svc_table
354 */
355 hash = ip_vs_svc_hashkey(svc->af, svc->protocol, &svc->addr,
356 svc->port);
357 list_add(&svc->s_list, &ip_vs_svc_table[hash]);
358 } else {
359 /*
360 * Hash it by fwmark in ip_vs_svc_fwm_table
361 */
362 hash = ip_vs_svc_fwm_hashkey(svc->fwmark);
363 list_add(&svc->f_list, &ip_vs_svc_fwm_table[hash]);
364 }
365
366 svc->flags |= IP_VS_SVC_F_HASHED;
367 /* increase its refcnt because it is referenced by the svc table */
368 atomic_inc(&svc->refcnt);
369 return 1;
370}
371
372
373/*
374 * Unhashes a service from ip_vs_svc_table/ip_vs_svc_fwm_table.
375 * Should be called with locked tables.
376 */
377static int ip_vs_svc_unhash(struct ip_vs_service *svc)
378{
379 if (!(svc->flags & IP_VS_SVC_F_HASHED)) {
380 pr_err("%s(): request for unhash flagged, called from %pF\n",
381 __func__, __builtin_return_address(0));
382 return 0;
383 }
384
385 if (svc->fwmark == 0) {
386 /* Remove it from the ip_vs_svc_table table */
387 list_del(&svc->s_list);
388 } else {
389 /* Remove it from the ip_vs_svc_fwm_table table */
390 list_del(&svc->f_list);
391 }
392
393 svc->flags &= ~IP_VS_SVC_F_HASHED;
394 atomic_dec(&svc->refcnt);
395 return 1;
396}
397
398
399/*
400 * Get service by {proto,addr,port} in the service table.
401 */
402static inline struct ip_vs_service *
403__ip_vs_service_get(int af, __u16 protocol, const union nf_inet_addr *vaddr,
404 __be16 vport)
405{
406 unsigned hash;
407 struct ip_vs_service *svc;
408
409 /* Check for "full" addressed entries */
410 hash = ip_vs_svc_hashkey(af, protocol, vaddr, vport);
411
412 list_for_each_entry(svc, &ip_vs_svc_table[hash], s_list){
413 if ((svc->af == af)
414 && ip_vs_addr_equal(af, &svc->addr, vaddr)
415 && (svc->port == vport)
416 && (svc->protocol == protocol)) {
417 /* HIT */
418 atomic_inc(&svc->usecnt);
419 return svc;
420 }
421 }
422
423 return NULL;
424}
425
426
427/*
428 * Get service by {fwmark} in the service table.
429 */
430static inline struct ip_vs_service *
431__ip_vs_svc_fwm_get(int af, __u32 fwmark)
432{
433 unsigned hash;
434 struct ip_vs_service *svc;
435
436 /* Check for fwmark addressed entries */
437 hash = ip_vs_svc_fwm_hashkey(fwmark);
438
439 list_for_each_entry(svc, &ip_vs_svc_fwm_table[hash], f_list) {
440 if (svc->fwmark == fwmark && svc->af == af) {
441 /* HIT */
442 atomic_inc(&svc->usecnt);
443 return svc;
444 }
445 }
446
447 return NULL;
448}
449
450struct ip_vs_service *
451ip_vs_service_get(int af, __u32 fwmark, __u16 protocol,
452 const union nf_inet_addr *vaddr, __be16 vport)
453{
454 struct ip_vs_service *svc;
455
456 read_lock(&__ip_vs_svc_lock);
457
458 /*
459 * Check the table hashed by fwmark first
460 */
461 if (fwmark && (svc = __ip_vs_svc_fwm_get(af, fwmark)))
462 goto out;
463
464 /*
465 * Check the table hashed by <protocol,addr,port>
466 * for "full" addressed entries
467 */
468 svc = __ip_vs_service_get(af, protocol, vaddr, vport);
469
470 if (svc == NULL
471 && protocol == IPPROTO_TCP
472 && atomic_read(&ip_vs_ftpsvc_counter)
473 && (vport == FTPDATA || ntohs(vport) >= PROT_SOCK)) {
474 /*
475 * Check if ftp service entry exists, the packet
476 * might belong to FTP data connections.
477 */
478 svc = __ip_vs_service_get(af, protocol, vaddr, FTPPORT);
479 }
480
481 if (svc == NULL
482 && atomic_read(&ip_vs_nullsvc_counter)) {
483 /*
484 * Check if the catch-all port (port zero) exists
485 */
486 svc = __ip_vs_service_get(af, protocol, vaddr, 0);
487 }
488
489 out:
490 read_unlock(&__ip_vs_svc_lock);
491
492 IP_VS_DBG_BUF(9, "lookup service: fwm %u %s %s:%u %s\n",
493 fwmark, ip_vs_proto_name(protocol),
494 IP_VS_DBG_ADDR(af, vaddr), ntohs(vport),
495 svc ? "hit" : "not hit");
496
497 return svc;
498}
499
500
501static inline void
502__ip_vs_bind_svc(struct ip_vs_dest *dest, struct ip_vs_service *svc)
503{
504 atomic_inc(&svc->refcnt);
505 dest->svc = svc;
506}
507
508static inline void
509__ip_vs_unbind_svc(struct ip_vs_dest *dest)
510{
511 struct ip_vs_service *svc = dest->svc;
512
513 dest->svc = NULL;
514 if (atomic_dec_and_test(&svc->refcnt))
515 kfree(svc);
516}
517
518
519/*
520 * Returns hash value for real service
521 */
522static inline unsigned ip_vs_rs_hashkey(int af,
523 const union nf_inet_addr *addr,
524 __be16 port)
525{
526 register unsigned porth = ntohs(port);
527 __be32 addr_fold = addr->ip;
528
529#ifdef CONFIG_IP_VS_IPV6
530 if (af == AF_INET6)
531 addr_fold = addr->ip6[0]^addr->ip6[1]^
532 addr->ip6[2]^addr->ip6[3];
533#endif
534
535 return (ntohl(addr_fold)^(porth>>IP_VS_RTAB_BITS)^porth)
536 & IP_VS_RTAB_MASK;
537}
538
539/*
540 * Hashes ip_vs_dest in ip_vs_rtable by <proto,addr,port>.
541 * should be called with locked tables.
542 */
543static int ip_vs_rs_hash(struct ip_vs_dest *dest)
544{
545 unsigned hash;
546
547 if (!list_empty(&dest->d_list)) {
548 return 0;
549 }
550
551 /*
552 * Hash by proto,addr,port,
553 * which are the parameters of the real service.
554 */
555 hash = ip_vs_rs_hashkey(dest->af, &dest->addr, dest->port);
556
557 list_add(&dest->d_list, &ip_vs_rtable[hash]);
558
559 return 1;
560}
561
562/*
563 * UNhashes ip_vs_dest from ip_vs_rtable.
564 * should be called with locked tables.
565 */
566static int ip_vs_rs_unhash(struct ip_vs_dest *dest)
567{
568 /*
569 * Remove it from the ip_vs_rtable table.
570 */
571 if (!list_empty(&dest->d_list)) {
572 list_del(&dest->d_list);
573 INIT_LIST_HEAD(&dest->d_list);
574 }
575
576 return 1;
577}
578
579/*
580 * Lookup real service by <proto,addr,port> in the real service table.
581 */
582struct ip_vs_dest *
583ip_vs_lookup_real_service(int af, __u16 protocol,
584 const union nf_inet_addr *daddr,
585 __be16 dport)
586{
587 unsigned hash;
588 struct ip_vs_dest *dest;
589
590 /*
591 * Check for "full" addressed entries
592 * Return the first found entry
593 */
594 hash = ip_vs_rs_hashkey(af, daddr, dport);
595
596 read_lock(&__ip_vs_rs_lock);
597 list_for_each_entry(dest, &ip_vs_rtable[hash], d_list) {
598 if ((dest->af == af)
599 && ip_vs_addr_equal(af, &dest->addr, daddr)
600 && (dest->port == dport)
601 && ((dest->protocol == protocol) ||
602 dest->vfwmark)) {
603 /* HIT */
604 read_unlock(&__ip_vs_rs_lock);
605 return dest;
606 }
607 }
608 read_unlock(&__ip_vs_rs_lock);
609
610 return NULL;
611}
612
613/*
614 * Lookup destination by {addr,port} in the given service
615 */
616static struct ip_vs_dest *
617ip_vs_lookup_dest(struct ip_vs_service *svc, const union nf_inet_addr *daddr,
618 __be16 dport)
619{
620 struct ip_vs_dest *dest;
621
622 /*
623 * Find the destination for the given service
624 */
625 list_for_each_entry(dest, &svc->destinations, n_list) {
626 if ((dest->af == svc->af)
627 && ip_vs_addr_equal(svc->af, &dest->addr, daddr)
628 && (dest->port == dport)) {
629 /* HIT */
630 return dest;
631 }
632 }
633
634 return NULL;
635}
636
637/*
638 * Find destination by {daddr,dport,vaddr,protocol}
639 * Cretaed to be used in ip_vs_process_message() in
640 * the backup synchronization daemon. It finds the
641 * destination to be bound to the received connection
642 * on the backup.
643 *
644 * ip_vs_lookup_real_service() looked promissing, but
645 * seems not working as expected.
646 */
647struct ip_vs_dest *ip_vs_find_dest(int af, const union nf_inet_addr *daddr,
648 __be16 dport,
649 const union nf_inet_addr *vaddr,
650 __be16 vport, __u16 protocol)
651{
652 struct ip_vs_dest *dest;
653 struct ip_vs_service *svc;
654
655 svc = ip_vs_service_get(af, 0, protocol, vaddr, vport);
656 if (!svc)
657 return NULL;
658 dest = ip_vs_lookup_dest(svc, daddr, dport);
659 if (dest)
660 atomic_inc(&dest->refcnt);
661 ip_vs_service_put(svc);
662 return dest;
663}
664
665/*
666 * Lookup dest by {svc,addr,port} in the destination trash.
667 * The destination trash is used to hold the destinations that are removed
668 * from the service table but are still referenced by some conn entries.
669 * The reason to add the destination trash is when the dest is temporary
670 * down (either by administrator or by monitor program), the dest can be
671 * picked back from the trash, the remaining connections to the dest can
672 * continue, and the counting information of the dest is also useful for
673 * scheduling.
674 */
675static struct ip_vs_dest *
676ip_vs_trash_get_dest(struct ip_vs_service *svc, const union nf_inet_addr *daddr,
677 __be16 dport)
678{
679 struct ip_vs_dest *dest, *nxt;
680
681 /*
682 * Find the destination in trash
683 */
684 list_for_each_entry_safe(dest, nxt, &ip_vs_dest_trash, n_list) {
685 IP_VS_DBG_BUF(3, "Destination %u/%s:%u still in trash, "
686 "dest->refcnt=%d\n",
687 dest->vfwmark,
688 IP_VS_DBG_ADDR(svc->af, &dest->addr),
689 ntohs(dest->port),
690 atomic_read(&dest->refcnt));
691 if (dest->af == svc->af &&
692 ip_vs_addr_equal(svc->af, &dest->addr, daddr) &&
693 dest->port == dport &&
694 dest->vfwmark == svc->fwmark &&
695 dest->protocol == svc->protocol &&
696 (svc->fwmark ||
697 (ip_vs_addr_equal(svc->af, &dest->vaddr, &svc->addr) &&
698 dest->vport == svc->port))) {
699 /* HIT */
700 return dest;
701 }
702
703 /*
704 * Try to purge the destination from trash if not referenced
705 */
706 if (atomic_read(&dest->refcnt) == 1) {
707 IP_VS_DBG_BUF(3, "Removing destination %u/%s:%u "
708 "from trash\n",
709 dest->vfwmark,
710 IP_VS_DBG_ADDR(svc->af, &dest->addr),
711 ntohs(dest->port));
712 list_del(&dest->n_list);
713 ip_vs_dst_reset(dest);
714 __ip_vs_unbind_svc(dest);
715 kfree(dest);
716 }
717 }
718
719 return NULL;
720}
721
722
723/*
724 * Clean up all the destinations in the trash
725 * Called by the ip_vs_control_cleanup()
726 *
727 * When the ip_vs_control_clearup is activated by ipvs module exit,
728 * the service tables must have been flushed and all the connections
729 * are expired, and the refcnt of each destination in the trash must
730 * be 1, so we simply release them here.
731 */
732static void ip_vs_trash_cleanup(void)
733{
734 struct ip_vs_dest *dest, *nxt;
735
736 list_for_each_entry_safe(dest, nxt, &ip_vs_dest_trash, n_list) {
737 list_del(&dest->n_list);
738 ip_vs_dst_reset(dest);
739 __ip_vs_unbind_svc(dest);
740 kfree(dest);
741 }
742}
743
744
745static void
746ip_vs_zero_stats(struct ip_vs_stats *stats)
747{
748 spin_lock_bh(&stats->lock);
749
750 memset(&stats->ustats, 0, sizeof(stats->ustats));
751 ip_vs_zero_estimator(stats);
752
753 spin_unlock_bh(&stats->lock);
754}
755
756/*
757 * Update a destination in the given service
758 */
759static void
760__ip_vs_update_dest(struct ip_vs_service *svc,
761 struct ip_vs_dest *dest, struct ip_vs_dest_user_kern *udest)
762{
763 int conn_flags;
764
765 /* set the weight and the flags */
766 atomic_set(&dest->weight, udest->weight);
767 conn_flags = udest->conn_flags | IP_VS_CONN_F_INACTIVE;
768
769 /* check if local node and update the flags */
770#ifdef CONFIG_IP_VS_IPV6
771 if (svc->af == AF_INET6) {
772 if (__ip_vs_addr_is_local_v6(&udest->addr.in6)) {
773 conn_flags = (conn_flags & ~IP_VS_CONN_F_FWD_MASK)
774 | IP_VS_CONN_F_LOCALNODE;
775 }
776 } else
777#endif
778 if (inet_addr_type(&init_net, udest->addr.ip) == RTN_LOCAL) {
779 conn_flags = (conn_flags & ~IP_VS_CONN_F_FWD_MASK)
780 | IP_VS_CONN_F_LOCALNODE;
781 }
782
783 /* set the IP_VS_CONN_F_NOOUTPUT flag if not masquerading/NAT */
784 if ((conn_flags & IP_VS_CONN_F_FWD_MASK) != 0) {
785 conn_flags |= IP_VS_CONN_F_NOOUTPUT;
786 } else {
787 /*
788 * Put the real service in ip_vs_rtable if not present.
789 * For now only for NAT!
790 */
791 write_lock_bh(&__ip_vs_rs_lock);
792 ip_vs_rs_hash(dest);
793 write_unlock_bh(&__ip_vs_rs_lock);
794 }
795 atomic_set(&dest->conn_flags, conn_flags);
796
797 /* bind the service */
798 if (!dest->svc) {
799 __ip_vs_bind_svc(dest, svc);
800 } else {
801 if (dest->svc != svc) {
802 __ip_vs_unbind_svc(dest);
803 ip_vs_zero_stats(&dest->stats);
804 __ip_vs_bind_svc(dest, svc);
805 }
806 }
807
808 /* set the dest status flags */
809 dest->flags |= IP_VS_DEST_F_AVAILABLE;
810
811 if (udest->u_threshold == 0 || udest->u_threshold > dest->u_threshold)
812 dest->flags &= ~IP_VS_DEST_F_OVERLOAD;
813 dest->u_threshold = udest->u_threshold;
814 dest->l_threshold = udest->l_threshold;
815}
816
817
818/*
819 * Create a destination for the given service
820 */
821static int
822ip_vs_new_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest,
823 struct ip_vs_dest **dest_p)
824{
825 struct ip_vs_dest *dest;
826 unsigned atype;
827
828 EnterFunction(2);
829
830#ifdef CONFIG_IP_VS_IPV6
831 if (svc->af == AF_INET6) {
832 atype = ipv6_addr_type(&udest->addr.in6);
833 if ((!(atype & IPV6_ADDR_UNICAST) ||
834 atype & IPV6_ADDR_LINKLOCAL) &&
835 !__ip_vs_addr_is_local_v6(&udest->addr.in6))
836 return -EINVAL;
837 } else
838#endif
839 {
840 atype = inet_addr_type(&init_net, udest->addr.ip);
841 if (atype != RTN_LOCAL && atype != RTN_UNICAST)
842 return -EINVAL;
843 }
844
845 dest = kzalloc(sizeof(struct ip_vs_dest), GFP_ATOMIC);
846 if (dest == NULL) {
847 pr_err("%s(): no memory.\n", __func__);
848 return -ENOMEM;
849 }
850
851 dest->af = svc->af;
852 dest->protocol = svc->protocol;
853 dest->vaddr = svc->addr;
854 dest->vport = svc->port;
855 dest->vfwmark = svc->fwmark;
856 ip_vs_addr_copy(svc->af, &dest->addr, &udest->addr);
857 dest->port = udest->port;
858
859 atomic_set(&dest->activeconns, 0);
860 atomic_set(&dest->inactconns, 0);
861 atomic_set(&dest->persistconns, 0);
862 atomic_set(&dest->refcnt, 0);
863
864 INIT_LIST_HEAD(&dest->d_list);
865 spin_lock_init(&dest->dst_lock);
866 spin_lock_init(&dest->stats.lock);
867 __ip_vs_update_dest(svc, dest, udest);
868 ip_vs_new_estimator(&dest->stats);
869
870 *dest_p = dest;
871
872 LeaveFunction(2);
873 return 0;
874}
875
876
877/*
878 * Add a destination into an existing service
879 */
880static int
881ip_vs_add_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
882{
883 struct ip_vs_dest *dest;
884 union nf_inet_addr daddr;
885 __be16 dport = udest->port;
886 int ret;
887
888 EnterFunction(2);
889
890 if (udest->weight < 0) {
891 pr_err("%s(): server weight less than zero\n", __func__);
892 return -ERANGE;
893 }
894
895 if (udest->l_threshold > udest->u_threshold) {
896 pr_err("%s(): lower threshold is higher than upper threshold\n",
897 __func__);
898 return -ERANGE;
899 }
900
901 ip_vs_addr_copy(svc->af, &daddr, &udest->addr);
902
903 /*
904 * Check if the dest already exists in the list
905 */
906 dest = ip_vs_lookup_dest(svc, &daddr, dport);
907
908 if (dest != NULL) {
909 IP_VS_DBG(1, "%s(): dest already exists\n", __func__);
910 return -EEXIST;
911 }
912
913 /*
914 * Check if the dest already exists in the trash and
915 * is from the same service
916 */
917 dest = ip_vs_trash_get_dest(svc, &daddr, dport);
918
919 if (dest != NULL) {
920 IP_VS_DBG_BUF(3, "Get destination %s:%u from trash, "
921 "dest->refcnt=%d, service %u/%s:%u\n",
922 IP_VS_DBG_ADDR(svc->af, &daddr), ntohs(dport),
923 atomic_read(&dest->refcnt),
924 dest->vfwmark,
925 IP_VS_DBG_ADDR(svc->af, &dest->vaddr),
926 ntohs(dest->vport));
927
928 __ip_vs_update_dest(svc, dest, udest);
929
930 /*
931 * Get the destination from the trash
932 */
933 list_del(&dest->n_list);
934
935 ip_vs_new_estimator(&dest->stats);
936
937 write_lock_bh(&__ip_vs_svc_lock);
938
939 /*
940 * Wait until all other svc users go away.
941 */
942 IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
943
944 list_add(&dest->n_list, &svc->destinations);
945 svc->num_dests++;
946
947 /* call the update_service function of its scheduler */
948 if (svc->scheduler->update_service)
949 svc->scheduler->update_service(svc);
950
951 write_unlock_bh(&__ip_vs_svc_lock);
952 return 0;
953 }
954
955 /*
956 * Allocate and initialize the dest structure
957 */
958 ret = ip_vs_new_dest(svc, udest, &dest);
959 if (ret) {
960 return ret;
961 }
962
963 /*
964 * Add the dest entry into the list
965 */
966 atomic_inc(&dest->refcnt);
967
968 write_lock_bh(&__ip_vs_svc_lock);
969
970 /*
971 * Wait until all other svc users go away.
972 */
973 IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
974
975 list_add(&dest->n_list, &svc->destinations);
976 svc->num_dests++;
977
978 /* call the update_service function of its scheduler */
979 if (svc->scheduler->update_service)
980 svc->scheduler->update_service(svc);
981
982 write_unlock_bh(&__ip_vs_svc_lock);
983
984 LeaveFunction(2);
985
986 return 0;
987}
988
989
990/*
991 * Edit a destination in the given service
992 */
993static int
994ip_vs_edit_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
995{
996 struct ip_vs_dest *dest;
997 union nf_inet_addr daddr;
998 __be16 dport = udest->port;
999
1000 EnterFunction(2);
1001
1002 if (udest->weight < 0) {
1003 pr_err("%s(): server weight less than zero\n", __func__);
1004 return -ERANGE;
1005 }
1006
1007 if (udest->l_threshold > udest->u_threshold) {
1008 pr_err("%s(): lower threshold is higher than upper threshold\n",
1009 __func__);
1010 return -ERANGE;
1011 }
1012
1013 ip_vs_addr_copy(svc->af, &daddr, &udest->addr);
1014
1015 /*
1016 * Lookup the destination list
1017 */
1018 dest = ip_vs_lookup_dest(svc, &daddr, dport);
1019
1020 if (dest == NULL) {
1021 IP_VS_DBG(1, "%s(): dest doesn't exist\n", __func__);
1022 return -ENOENT;
1023 }
1024
1025 __ip_vs_update_dest(svc, dest, udest);
1026
1027 write_lock_bh(&__ip_vs_svc_lock);
1028
1029 /* Wait until all other svc users go away */
1030 IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
1031
1032 /* call the update_service, because server weight may be changed */
1033 if (svc->scheduler->update_service)
1034 svc->scheduler->update_service(svc);
1035
1036 write_unlock_bh(&__ip_vs_svc_lock);
1037
1038 LeaveFunction(2);
1039
1040 return 0;
1041}
1042
1043
1044/*
1045 * Delete a destination (must be already unlinked from the service)
1046 */
1047static void __ip_vs_del_dest(struct ip_vs_dest *dest)
1048{
1049 ip_vs_kill_estimator(&dest->stats);
1050
1051 /*
1052 * Remove it from the d-linked list with the real services.
1053 */
1054 write_lock_bh(&__ip_vs_rs_lock);
1055 ip_vs_rs_unhash(dest);
1056 write_unlock_bh(&__ip_vs_rs_lock);
1057
1058 /*
1059 * Decrease the refcnt of the dest, and free the dest
1060 * if nobody refers to it (refcnt=0). Otherwise, throw
1061 * the destination into the trash.
1062 */
1063 if (atomic_dec_and_test(&dest->refcnt)) {
1064 ip_vs_dst_reset(dest);
1065 /* simply decrease svc->refcnt here, let the caller check
1066 and release the service if nobody refers to it.
1067 Only user context can release destination and service,
1068 and only one user context can update virtual service at a
1069 time, so the operation here is OK */
1070 atomic_dec(&dest->svc->refcnt);
1071 kfree(dest);
1072 } else {
1073 IP_VS_DBG_BUF(3, "Moving dest %s:%u into trash, "
1074 "dest->refcnt=%d\n",
1075 IP_VS_DBG_ADDR(dest->af, &dest->addr),
1076 ntohs(dest->port),
1077 atomic_read(&dest->refcnt));
1078 list_add(&dest->n_list, &ip_vs_dest_trash);
1079 atomic_inc(&dest->refcnt);
1080 }
1081}
1082
1083
1084/*
1085 * Unlink a destination from the given service
1086 */
1087static void __ip_vs_unlink_dest(struct ip_vs_service *svc,
1088 struct ip_vs_dest *dest,
1089 int svcupd)
1090{
1091 dest->flags &= ~IP_VS_DEST_F_AVAILABLE;
1092
1093 /*
1094 * Remove it from the d-linked destination list.
1095 */
1096 list_del(&dest->n_list);
1097 svc->num_dests--;
1098
1099 /*
1100 * Call the update_service function of its scheduler
1101 */
1102 if (svcupd && svc->scheduler->update_service)
1103 svc->scheduler->update_service(svc);
1104}
1105
1106
1107/*
1108 * Delete a destination server in the given service
1109 */
1110static int
1111ip_vs_del_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
1112{
1113 struct ip_vs_dest *dest;
1114 __be16 dport = udest->port;
1115
1116 EnterFunction(2);
1117
1118 dest = ip_vs_lookup_dest(svc, &udest->addr, dport);
1119
1120 if (dest == NULL) {
1121 IP_VS_DBG(1, "%s(): destination not found!\n", __func__);
1122 return -ENOENT;
1123 }
1124
1125 write_lock_bh(&__ip_vs_svc_lock);
1126
1127 /*
1128 * Wait until all other svc users go away.
1129 */
1130 IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
1131
1132 /*
1133 * Unlink dest from the service
1134 */
1135 __ip_vs_unlink_dest(svc, dest, 1);
1136
1137 write_unlock_bh(&__ip_vs_svc_lock);
1138
1139 /*
1140 * Delete the destination
1141 */
1142 __ip_vs_del_dest(dest);
1143
1144 LeaveFunction(2);
1145
1146 return 0;
1147}
1148
1149
1150/*
1151 * Add a service into the service hash table
1152 */
1153static int
1154ip_vs_add_service(struct ip_vs_service_user_kern *u,
1155 struct ip_vs_service **svc_p)
1156{
1157 int ret = 0;
1158 struct ip_vs_scheduler *sched = NULL;
1159 struct ip_vs_service *svc = NULL;
1160
1161 /* increase the module use count */
1162 ip_vs_use_count_inc();
1163
1164 /* Lookup the scheduler by 'u->sched_name' */
1165 sched = ip_vs_scheduler_get(u->sched_name);
1166 if (sched == NULL) {
1167 pr_info("Scheduler module ip_vs_%s not found\n", u->sched_name);
1168 ret = -ENOENT;
1169 goto out_mod_dec;
1170 }
1171
1172#ifdef CONFIG_IP_VS_IPV6
1173 if (u->af == AF_INET6 && (u->netmask < 1 || u->netmask > 128)) {
1174 ret = -EINVAL;
1175 goto out_err;
1176 }
1177#endif
1178
1179 svc = kzalloc(sizeof(struct ip_vs_service), GFP_ATOMIC);
1180 if (svc == NULL) {
1181 IP_VS_DBG(1, "%s(): no memory\n", __func__);
1182 ret = -ENOMEM;
1183 goto out_err;
1184 }
1185
1186 /* I'm the first user of the service */
1187 atomic_set(&svc->usecnt, 1);
1188 atomic_set(&svc->refcnt, 0);
1189
1190 svc->af = u->af;
1191 svc->protocol = u->protocol;
1192 ip_vs_addr_copy(svc->af, &svc->addr, &u->addr);
1193 svc->port = u->port;
1194 svc->fwmark = u->fwmark;
1195 svc->flags = u->flags;
1196 svc->timeout = u->timeout * HZ;
1197 svc->netmask = u->netmask;
1198
1199 INIT_LIST_HEAD(&svc->destinations);
1200 rwlock_init(&svc->sched_lock);
1201 spin_lock_init(&svc->stats.lock);
1202
1203 /* Bind the scheduler */
1204 ret = ip_vs_bind_scheduler(svc, sched);
1205 if (ret)
1206 goto out_err;
1207 sched = NULL;
1208
1209 /* Update the virtual service counters */
1210 if (svc->port == FTPPORT)
1211 atomic_inc(&ip_vs_ftpsvc_counter);
1212 else if (svc->port == 0)
1213 atomic_inc(&ip_vs_nullsvc_counter);
1214
1215 ip_vs_new_estimator(&svc->stats);
1216
1217 /* Count only IPv4 services for old get/setsockopt interface */
1218 if (svc->af == AF_INET)
1219 ip_vs_num_services++;
1220
1221 /* Hash the service into the service table */
1222 write_lock_bh(&__ip_vs_svc_lock);
1223 ip_vs_svc_hash(svc);
1224 write_unlock_bh(&__ip_vs_svc_lock);
1225
1226 *svc_p = svc;
1227 return 0;
1228
1229 out_err:
1230 if (svc != NULL) {
1231 if (svc->scheduler)
1232 ip_vs_unbind_scheduler(svc);
1233 if (svc->inc) {
1234 local_bh_disable();
1235 ip_vs_app_inc_put(svc->inc);
1236 local_bh_enable();
1237 }
1238 kfree(svc);
1239 }
1240 ip_vs_scheduler_put(sched);
1241
1242 out_mod_dec:
1243 /* decrease the module use count */
1244 ip_vs_use_count_dec();
1245
1246 return ret;
1247}
1248
1249
1250/*
1251 * Edit a service and bind it with a new scheduler
1252 */
1253static int
1254ip_vs_edit_service(struct ip_vs_service *svc, struct ip_vs_service_user_kern *u)
1255{
1256 struct ip_vs_scheduler *sched, *old_sched;
1257 int ret = 0;
1258
1259 /*
1260 * Lookup the scheduler, by 'u->sched_name'
1261 */
1262 sched = ip_vs_scheduler_get(u->sched_name);
1263 if (sched == NULL) {
1264 pr_info("Scheduler module ip_vs_%s not found\n", u->sched_name);
1265 return -ENOENT;
1266 }
1267 old_sched = sched;
1268
1269#ifdef CONFIG_IP_VS_IPV6
1270 if (u->af == AF_INET6 && (u->netmask < 1 || u->netmask > 128)) {
1271 ret = -EINVAL;
1272 goto out;
1273 }
1274#endif
1275
1276 write_lock_bh(&__ip_vs_svc_lock);
1277
1278 /*
1279 * Wait until all other svc users go away.
1280 */
1281 IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
1282
1283 /*
1284 * Set the flags and timeout value
1285 */
1286 svc->flags = u->flags | IP_VS_SVC_F_HASHED;
1287 svc->timeout = u->timeout * HZ;
1288 svc->netmask = u->netmask;
1289
1290 old_sched = svc->scheduler;
1291 if (sched != old_sched) {
1292 /*
1293 * Unbind the old scheduler
1294 */
1295 if ((ret = ip_vs_unbind_scheduler(svc))) {
1296 old_sched = sched;
1297 goto out_unlock;
1298 }
1299
1300 /*
1301 * Bind the new scheduler
1302 */
1303 if ((ret = ip_vs_bind_scheduler(svc, sched))) {
1304 /*
1305 * If ip_vs_bind_scheduler fails, restore the old
1306 * scheduler.
1307 * The main reason of failure is out of memory.
1308 *
1309 * The question is if the old scheduler can be
1310 * restored all the time. TODO: if it cannot be
1311 * restored some time, we must delete the service,
1312 * otherwise the system may crash.
1313 */
1314 ip_vs_bind_scheduler(svc, old_sched);
1315 old_sched = sched;
1316 goto out_unlock;
1317 }
1318 }
1319
1320 out_unlock:
1321 write_unlock_bh(&__ip_vs_svc_lock);
1322#ifdef CONFIG_IP_VS_IPV6
1323 out:
1324#endif
1325
1326 if (old_sched)
1327 ip_vs_scheduler_put(old_sched);
1328
1329 return ret;
1330}
1331
1332
1333/*
1334 * Delete a service from the service list
1335 * - The service must be unlinked, unlocked and not referenced!
1336 * - We are called under _bh lock
1337 */
1338static void __ip_vs_del_service(struct ip_vs_service *svc)
1339{
1340 struct ip_vs_dest *dest, *nxt;
1341 struct ip_vs_scheduler *old_sched;
1342
1343 /* Count only IPv4 services for old get/setsockopt interface */
1344 if (svc->af == AF_INET)
1345 ip_vs_num_services--;
1346
1347 ip_vs_kill_estimator(&svc->stats);
1348
1349 /* Unbind scheduler */
1350 old_sched = svc->scheduler;
1351 ip_vs_unbind_scheduler(svc);
1352 if (old_sched)
1353 ip_vs_scheduler_put(old_sched);
1354
1355 /* Unbind app inc */
1356 if (svc->inc) {
1357 ip_vs_app_inc_put(svc->inc);
1358 svc->inc = NULL;
1359 }
1360
1361 /*
1362 * Unlink the whole destination list
1363 */
1364 list_for_each_entry_safe(dest, nxt, &svc->destinations, n_list) {
1365 __ip_vs_unlink_dest(svc, dest, 0);
1366 __ip_vs_del_dest(dest);
1367 }
1368
1369 /*
1370 * Update the virtual service counters
1371 */
1372 if (svc->port == FTPPORT)
1373 atomic_dec(&ip_vs_ftpsvc_counter);
1374 else if (svc->port == 0)
1375 atomic_dec(&ip_vs_nullsvc_counter);
1376
1377 /*
1378 * Free the service if nobody refers to it
1379 */
1380 if (atomic_read(&svc->refcnt) == 0)
1381 kfree(svc);
1382
1383 /* decrease the module use count */
1384 ip_vs_use_count_dec();
1385}
1386
1387/*
1388 * Delete a service from the service list
1389 */
1390static int ip_vs_del_service(struct ip_vs_service *svc)
1391{
1392 if (svc == NULL)
1393 return -EEXIST;
1394
1395 /*
1396 * Unhash it from the service table
1397 */
1398 write_lock_bh(&__ip_vs_svc_lock);
1399
1400 ip_vs_svc_unhash(svc);
1401
1402 /*
1403 * Wait until all the svc users go away.
1404 */
1405 IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
1406
1407 __ip_vs_del_service(svc);
1408
1409 write_unlock_bh(&__ip_vs_svc_lock);
1410
1411 return 0;
1412}
1413
1414
1415/*
1416 * Flush all the virtual services
1417 */
1418static int ip_vs_flush(void)
1419{
1420 int idx;
1421 struct ip_vs_service *svc, *nxt;
1422
1423 /*
1424 * Flush the service table hashed by <protocol,addr,port>
1425 */
1426 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1427 list_for_each_entry_safe(svc, nxt, &ip_vs_svc_table[idx], s_list) {
1428 write_lock_bh(&__ip_vs_svc_lock);
1429 ip_vs_svc_unhash(svc);
1430 /*
1431 * Wait until all the svc users go away.
1432 */
1433 IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 0);
1434 __ip_vs_del_service(svc);
1435 write_unlock_bh(&__ip_vs_svc_lock);
1436 }
1437 }
1438
1439 /*
1440 * Flush the service table hashed by fwmark
1441 */
1442 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1443 list_for_each_entry_safe(svc, nxt,
1444 &ip_vs_svc_fwm_table[idx], f_list) {
1445 write_lock_bh(&__ip_vs_svc_lock);
1446 ip_vs_svc_unhash(svc);
1447 /*
1448 * Wait until all the svc users go away.
1449 */
1450 IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 0);
1451 __ip_vs_del_service(svc);
1452 write_unlock_bh(&__ip_vs_svc_lock);
1453 }
1454 }
1455
1456 return 0;
1457}
1458
1459
1460/*
1461 * Zero counters in a service or all services
1462 */
1463static int ip_vs_zero_service(struct ip_vs_service *svc)
1464{
1465 struct ip_vs_dest *dest;
1466
1467 write_lock_bh(&__ip_vs_svc_lock);
1468 list_for_each_entry(dest, &svc->destinations, n_list) {
1469 ip_vs_zero_stats(&dest->stats);
1470 }
1471 ip_vs_zero_stats(&svc->stats);
1472 write_unlock_bh(&__ip_vs_svc_lock);
1473 return 0;
1474}
1475
1476static int ip_vs_zero_all(void)
1477{
1478 int idx;
1479 struct ip_vs_service *svc;
1480
1481 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1482 list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
1483 ip_vs_zero_service(svc);
1484 }
1485 }
1486
1487 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1488 list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
1489 ip_vs_zero_service(svc);
1490 }
1491 }
1492
1493 ip_vs_zero_stats(&ip_vs_stats);
1494 return 0;
1495}
1496
1497
1498static int
1499proc_do_defense_mode(ctl_table *table, int write,
1500 void __user *buffer, size_t *lenp, loff_t *ppos)
1501{
1502 int *valp = table->data;
1503 int val = *valp;
1504 int rc;
1505
1506 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1507 if (write && (*valp != val)) {
1508 if ((*valp < 0) || (*valp > 3)) {
1509 /* Restore the correct value */
1510 *valp = val;
1511 } else {
1512 update_defense_level();
1513 }
1514 }
1515 return rc;
1516}
1517
1518
1519static int
1520proc_do_sync_threshold(ctl_table *table, int write,
1521 void __user *buffer, size_t *lenp, loff_t *ppos)
1522{
1523 int *valp = table->data;
1524 int val[2];
1525 int rc;
1526
1527 /* backup the value first */
1528 memcpy(val, valp, sizeof(val));
1529
1530 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1531 if (write && (valp[0] < 0 || valp[1] < 0 || valp[0] >= valp[1])) {
1532 /* Restore the correct value */
1533 memcpy(valp, val, sizeof(val));
1534 }
1535 return rc;
1536}
1537
1538
1539/*
1540 * IPVS sysctl table (under the /proc/sys/net/ipv4/vs/)
1541 */
1542
1543static struct ctl_table vs_vars[] = {
1544 {
1545 .procname = "amemthresh",
1546 .data = &sysctl_ip_vs_amemthresh,
1547 .maxlen = sizeof(int),
1548 .mode = 0644,
1549 .proc_handler = proc_dointvec,
1550 },
1551#ifdef CONFIG_IP_VS_DEBUG
1552 {
1553 .procname = "debug_level",
1554 .data = &sysctl_ip_vs_debug_level,
1555 .maxlen = sizeof(int),
1556 .mode = 0644,
1557 .proc_handler = proc_dointvec,
1558 },
1559#endif
1560 {
1561 .procname = "am_droprate",
1562 .data = &sysctl_ip_vs_am_droprate,
1563 .maxlen = sizeof(int),
1564 .mode = 0644,
1565 .proc_handler = proc_dointvec,
1566 },
1567 {
1568 .procname = "drop_entry",
1569 .data = &sysctl_ip_vs_drop_entry,
1570 .maxlen = sizeof(int),
1571 .mode = 0644,
1572 .proc_handler = proc_do_defense_mode,
1573 },
1574 {
1575 .procname = "drop_packet",
1576 .data = &sysctl_ip_vs_drop_packet,
1577 .maxlen = sizeof(int),
1578 .mode = 0644,
1579 .proc_handler = proc_do_defense_mode,
1580 },
1581 {
1582 .procname = "secure_tcp",
1583 .data = &sysctl_ip_vs_secure_tcp,
1584 .maxlen = sizeof(int),
1585 .mode = 0644,
1586 .proc_handler = proc_do_defense_mode,
1587 },
1588#if 0
1589 {
1590 .procname = "timeout_established",
1591 .data = &vs_timeout_table_dos.timeout[IP_VS_S_ESTABLISHED],
1592 .maxlen = sizeof(int),
1593 .mode = 0644,
1594 .proc_handler = proc_dointvec_jiffies,
1595 },
1596 {
1597 .procname = "timeout_synsent",
1598 .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYN_SENT],
1599 .maxlen = sizeof(int),
1600 .mode = 0644,
1601 .proc_handler = proc_dointvec_jiffies,
1602 },
1603 {
1604 .procname = "timeout_synrecv",
1605 .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYN_RECV],
1606 .maxlen = sizeof(int),
1607 .mode = 0644,
1608 .proc_handler = proc_dointvec_jiffies,
1609 },
1610 {
1611 .procname = "timeout_finwait",
1612 .data = &vs_timeout_table_dos.timeout[IP_VS_S_FIN_WAIT],
1613 .maxlen = sizeof(int),
1614 .mode = 0644,
1615 .proc_handler = proc_dointvec_jiffies,
1616 },
1617 {
1618 .procname = "timeout_timewait",
1619 .data = &vs_timeout_table_dos.timeout[IP_VS_S_TIME_WAIT],
1620 .maxlen = sizeof(int),
1621 .mode = 0644,
1622 .proc_handler = proc_dointvec_jiffies,
1623 },
1624 {
1625 .procname = "timeout_close",
1626 .data = &vs_timeout_table_dos.timeout[IP_VS_S_CLOSE],
1627 .maxlen = sizeof(int),
1628 .mode = 0644,
1629 .proc_handler = proc_dointvec_jiffies,
1630 },
1631 {
1632 .procname = "timeout_closewait",
1633 .data = &vs_timeout_table_dos.timeout[IP_VS_S_CLOSE_WAIT],
1634 .maxlen = sizeof(int),
1635 .mode = 0644,
1636 .proc_handler = proc_dointvec_jiffies,
1637 },
1638 {
1639 .procname = "timeout_lastack",
1640 .data = &vs_timeout_table_dos.timeout[IP_VS_S_LAST_ACK],
1641 .maxlen = sizeof(int),
1642 .mode = 0644,
1643 .proc_handler = proc_dointvec_jiffies,
1644 },
1645 {
1646 .procname = "timeout_listen",
1647 .data = &vs_timeout_table_dos.timeout[IP_VS_S_LISTEN],
1648 .maxlen = sizeof(int),
1649 .mode = 0644,
1650 .proc_handler = proc_dointvec_jiffies,
1651 },
1652 {
1653 .procname = "timeout_synack",
1654 .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYNACK],
1655 .maxlen = sizeof(int),
1656 .mode = 0644,
1657 .proc_handler = proc_dointvec_jiffies,
1658 },
1659 {
1660 .procname = "timeout_udp",
1661 .data = &vs_timeout_table_dos.timeout[IP_VS_S_UDP],
1662 .maxlen = sizeof(int),
1663 .mode = 0644,
1664 .proc_handler = proc_dointvec_jiffies,
1665 },
1666 {
1667 .procname = "timeout_icmp",
1668 .data = &vs_timeout_table_dos.timeout[IP_VS_S_ICMP],
1669 .maxlen = sizeof(int),
1670 .mode = 0644,
1671 .proc_handler = proc_dointvec_jiffies,
1672 },
1673#endif
1674 {
1675 .procname = "cache_bypass",
1676 .data = &sysctl_ip_vs_cache_bypass,
1677 .maxlen = sizeof(int),
1678 .mode = 0644,
1679 .proc_handler = proc_dointvec,
1680 },
1681 {
1682 .procname = "expire_nodest_conn",
1683 .data = &sysctl_ip_vs_expire_nodest_conn,
1684 .maxlen = sizeof(int),
1685 .mode = 0644,
1686 .proc_handler = proc_dointvec,
1687 },
1688 {
1689 .procname = "expire_quiescent_template",
1690 .data = &sysctl_ip_vs_expire_quiescent_template,
1691 .maxlen = sizeof(int),
1692 .mode = 0644,
1693 .proc_handler = proc_dointvec,
1694 },
1695 {
1696 .procname = "sync_threshold",
1697 .data = &sysctl_ip_vs_sync_threshold,
1698 .maxlen = sizeof(sysctl_ip_vs_sync_threshold),
1699 .mode = 0644,
1700 .proc_handler = proc_do_sync_threshold,
1701 },
1702 {
1703 .procname = "nat_icmp_send",
1704 .data = &sysctl_ip_vs_nat_icmp_send,
1705 .maxlen = sizeof(int),
1706 .mode = 0644,
1707 .proc_handler = proc_dointvec,
1708 },
1709 { .ctl_name = 0 }
1710};
1711
1712const struct ctl_path net_vs_ctl_path[] = {
1713 { .procname = "net", .ctl_name = CTL_NET, },
1714 { .procname = "ipv4", .ctl_name = NET_IPV4, },
1715 { .procname = "vs", },
1716 { }
1717};
1718EXPORT_SYMBOL_GPL(net_vs_ctl_path);
1719
1720static struct ctl_table_header * sysctl_header;
1721
1722#ifdef CONFIG_PROC_FS
1723
1724struct ip_vs_iter {
1725 struct list_head *table;
1726 int bucket;
1727};
1728
1729/*
1730 * Write the contents of the VS rule table to a PROCfs file.
1731 * (It is kept just for backward compatibility)
1732 */
1733static inline const char *ip_vs_fwd_name(unsigned flags)
1734{
1735 switch (flags & IP_VS_CONN_F_FWD_MASK) {
1736 case IP_VS_CONN_F_LOCALNODE:
1737 return "Local";
1738 case IP_VS_CONN_F_TUNNEL:
1739 return "Tunnel";
1740 case IP_VS_CONN_F_DROUTE:
1741 return "Route";
1742 default:
1743 return "Masq";
1744 }
1745}
1746
1747
1748/* Get the Nth entry in the two lists */
1749static struct ip_vs_service *ip_vs_info_array(struct seq_file *seq, loff_t pos)
1750{
1751 struct ip_vs_iter *iter = seq->private;
1752 int idx;
1753 struct ip_vs_service *svc;
1754
1755 /* look in hash by protocol */
1756 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1757 list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
1758 if (pos-- == 0){
1759 iter->table = ip_vs_svc_table;
1760 iter->bucket = idx;
1761 return svc;
1762 }
1763 }
1764 }
1765
1766 /* keep looking in fwmark */
1767 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1768 list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
1769 if (pos-- == 0) {
1770 iter->table = ip_vs_svc_fwm_table;
1771 iter->bucket = idx;
1772 return svc;
1773 }
1774 }
1775 }
1776
1777 return NULL;
1778}
1779
1780static void *ip_vs_info_seq_start(struct seq_file *seq, loff_t *pos)
1781__acquires(__ip_vs_svc_lock)
1782{
1783
1784 read_lock_bh(&__ip_vs_svc_lock);
1785 return *pos ? ip_vs_info_array(seq, *pos - 1) : SEQ_START_TOKEN;
1786}
1787
1788
1789static void *ip_vs_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1790{
1791 struct list_head *e;
1792 struct ip_vs_iter *iter;
1793 struct ip_vs_service *svc;
1794
1795 ++*pos;
1796 if (v == SEQ_START_TOKEN)
1797 return ip_vs_info_array(seq,0);
1798
1799 svc = v;
1800 iter = seq->private;
1801
1802 if (iter->table == ip_vs_svc_table) {
1803 /* next service in table hashed by protocol */
1804 if ((e = svc->s_list.next) != &ip_vs_svc_table[iter->bucket])
1805 return list_entry(e, struct ip_vs_service, s_list);
1806
1807
1808 while (++iter->bucket < IP_VS_SVC_TAB_SIZE) {
1809 list_for_each_entry(svc,&ip_vs_svc_table[iter->bucket],
1810 s_list) {
1811 return svc;
1812 }
1813 }
1814
1815 iter->table = ip_vs_svc_fwm_table;
1816 iter->bucket = -1;
1817 goto scan_fwmark;
1818 }
1819
1820 /* next service in hashed by fwmark */
1821 if ((e = svc->f_list.next) != &ip_vs_svc_fwm_table[iter->bucket])
1822 return list_entry(e, struct ip_vs_service, f_list);
1823
1824 scan_fwmark:
1825 while (++iter->bucket < IP_VS_SVC_TAB_SIZE) {
1826 list_for_each_entry(svc, &ip_vs_svc_fwm_table[iter->bucket],
1827 f_list)
1828 return svc;
1829 }
1830
1831 return NULL;
1832}
1833
1834static void ip_vs_info_seq_stop(struct seq_file *seq, void *v)
1835__releases(__ip_vs_svc_lock)
1836{
1837 read_unlock_bh(&__ip_vs_svc_lock);
1838}
1839
1840
1841static int ip_vs_info_seq_show(struct seq_file *seq, void *v)
1842{
1843 if (v == SEQ_START_TOKEN) {
1844 seq_printf(seq,
1845 "IP Virtual Server version %d.%d.%d (size=%d)\n",
1846 NVERSION(IP_VS_VERSION_CODE), IP_VS_CONN_TAB_SIZE);
1847 seq_puts(seq,
1848 "Prot LocalAddress:Port Scheduler Flags\n");
1849 seq_puts(seq,
1850 " -> RemoteAddress:Port Forward Weight ActiveConn InActConn\n");
1851 } else {
1852 const struct ip_vs_service *svc = v;
1853 const struct ip_vs_iter *iter = seq->private;
1854 const struct ip_vs_dest *dest;
1855
1856 if (iter->table == ip_vs_svc_table) {
1857#ifdef CONFIG_IP_VS_IPV6
1858 if (svc->af == AF_INET6)
1859 seq_printf(seq, "%s [%pI6]:%04X %s ",
1860 ip_vs_proto_name(svc->protocol),
1861 &svc->addr.in6,
1862 ntohs(svc->port),
1863 svc->scheduler->name);
1864 else
1865#endif
1866 seq_printf(seq, "%s %08X:%04X %s ",
1867 ip_vs_proto_name(svc->protocol),
1868 ntohl(svc->addr.ip),
1869 ntohs(svc->port),
1870 svc->scheduler->name);
1871 } else {
1872 seq_printf(seq, "FWM %08X %s ",
1873 svc->fwmark, svc->scheduler->name);
1874 }
1875
1876 if (svc->flags & IP_VS_SVC_F_PERSISTENT)
1877 seq_printf(seq, "persistent %d %08X\n",
1878 svc->timeout,
1879 ntohl(svc->netmask));
1880 else
1881 seq_putc(seq, '\n');
1882
1883 list_for_each_entry(dest, &svc->destinations, n_list) {
1884#ifdef CONFIG_IP_VS_IPV6
1885 if (dest->af == AF_INET6)
1886 seq_printf(seq,
1887 " -> [%pI6]:%04X"
1888 " %-7s %-6d %-10d %-10d\n",
1889 &dest->addr.in6,
1890 ntohs(dest->port),
1891 ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
1892 atomic_read(&dest->weight),
1893 atomic_read(&dest->activeconns),
1894 atomic_read(&dest->inactconns));
1895 else
1896#endif
1897 seq_printf(seq,
1898 " -> %08X:%04X "
1899 "%-7s %-6d %-10d %-10d\n",
1900 ntohl(dest->addr.ip),
1901 ntohs(dest->port),
1902 ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
1903 atomic_read(&dest->weight),
1904 atomic_read(&dest->activeconns),
1905 atomic_read(&dest->inactconns));
1906
1907 }
1908 }
1909 return 0;
1910}
1911
1912static const struct seq_operations ip_vs_info_seq_ops = {
1913 .start = ip_vs_info_seq_start,
1914 .next = ip_vs_info_seq_next,
1915 .stop = ip_vs_info_seq_stop,
1916 .show = ip_vs_info_seq_show,
1917};
1918
1919static int ip_vs_info_open(struct inode *inode, struct file *file)
1920{
1921 return seq_open_private(file, &ip_vs_info_seq_ops,
1922 sizeof(struct ip_vs_iter));
1923}
1924
1925static const struct file_operations ip_vs_info_fops = {
1926 .owner = THIS_MODULE,
1927 .open = ip_vs_info_open,
1928 .read = seq_read,
1929 .llseek = seq_lseek,
1930 .release = seq_release_private,
1931};
1932
1933#endif
1934
1935struct ip_vs_stats ip_vs_stats = {
1936 .lock = __SPIN_LOCK_UNLOCKED(ip_vs_stats.lock),
1937};
1938
1939#ifdef CONFIG_PROC_FS
1940static int ip_vs_stats_show(struct seq_file *seq, void *v)
1941{
1942
1943/* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
1944 seq_puts(seq,
1945 " Total Incoming Outgoing Incoming Outgoing\n");
1946 seq_printf(seq,
1947 " Conns Packets Packets Bytes Bytes\n");
1948
1949 spin_lock_bh(&ip_vs_stats.lock);
1950 seq_printf(seq, "%8X %8X %8X %16LX %16LX\n\n", ip_vs_stats.ustats.conns,
1951 ip_vs_stats.ustats.inpkts, ip_vs_stats.ustats.outpkts,
1952 (unsigned long long) ip_vs_stats.ustats.inbytes,
1953 (unsigned long long) ip_vs_stats.ustats.outbytes);
1954
1955/* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
1956 seq_puts(seq,
1957 " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
1958 seq_printf(seq,"%8X %8X %8X %16X %16X\n",
1959 ip_vs_stats.ustats.cps,
1960 ip_vs_stats.ustats.inpps,
1961 ip_vs_stats.ustats.outpps,
1962 ip_vs_stats.ustats.inbps,
1963 ip_vs_stats.ustats.outbps);
1964 spin_unlock_bh(&ip_vs_stats.lock);
1965
1966 return 0;
1967}
1968
1969static int ip_vs_stats_seq_open(struct inode *inode, struct file *file)
1970{
1971 return single_open(file, ip_vs_stats_show, NULL);
1972}
1973
1974static const struct file_operations ip_vs_stats_fops = {
1975 .owner = THIS_MODULE,
1976 .open = ip_vs_stats_seq_open,
1977 .read = seq_read,
1978 .llseek = seq_lseek,
1979 .release = single_release,
1980};
1981
1982#endif
1983
1984/*
1985 * Set timeout values for tcp tcpfin udp in the timeout_table.
1986 */
1987static int ip_vs_set_timeout(struct ip_vs_timeout_user *u)
1988{
1989 IP_VS_DBG(2, "Setting timeout tcp:%d tcpfin:%d udp:%d\n",
1990 u->tcp_timeout,
1991 u->tcp_fin_timeout,
1992 u->udp_timeout);
1993
1994#ifdef CONFIG_IP_VS_PROTO_TCP
1995 if (u->tcp_timeout) {
1996 ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_ESTABLISHED]
1997 = u->tcp_timeout * HZ;
1998 }
1999
2000 if (u->tcp_fin_timeout) {
2001 ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_FIN_WAIT]
2002 = u->tcp_fin_timeout * HZ;
2003 }
2004#endif
2005
2006#ifdef CONFIG_IP_VS_PROTO_UDP
2007 if (u->udp_timeout) {
2008 ip_vs_protocol_udp.timeout_table[IP_VS_UDP_S_NORMAL]
2009 = u->udp_timeout * HZ;
2010 }
2011#endif
2012 return 0;
2013}
2014
2015
2016#define SET_CMDID(cmd) (cmd - IP_VS_BASE_CTL)
2017#define SERVICE_ARG_LEN (sizeof(struct ip_vs_service_user))
2018#define SVCDEST_ARG_LEN (sizeof(struct ip_vs_service_user) + \
2019 sizeof(struct ip_vs_dest_user))
2020#define TIMEOUT_ARG_LEN (sizeof(struct ip_vs_timeout_user))
2021#define DAEMON_ARG_LEN (sizeof(struct ip_vs_daemon_user))
2022#define MAX_ARG_LEN SVCDEST_ARG_LEN
2023
2024static const unsigned char set_arglen[SET_CMDID(IP_VS_SO_SET_MAX)+1] = {
2025 [SET_CMDID(IP_VS_SO_SET_ADD)] = SERVICE_ARG_LEN,
2026 [SET_CMDID(IP_VS_SO_SET_EDIT)] = SERVICE_ARG_LEN,
2027 [SET_CMDID(IP_VS_SO_SET_DEL)] = SERVICE_ARG_LEN,
2028 [SET_CMDID(IP_VS_SO_SET_FLUSH)] = 0,
2029 [SET_CMDID(IP_VS_SO_SET_ADDDEST)] = SVCDEST_ARG_LEN,
2030 [SET_CMDID(IP_VS_SO_SET_DELDEST)] = SVCDEST_ARG_LEN,
2031 [SET_CMDID(IP_VS_SO_SET_EDITDEST)] = SVCDEST_ARG_LEN,
2032 [SET_CMDID(IP_VS_SO_SET_TIMEOUT)] = TIMEOUT_ARG_LEN,
2033 [SET_CMDID(IP_VS_SO_SET_STARTDAEMON)] = DAEMON_ARG_LEN,
2034 [SET_CMDID(IP_VS_SO_SET_STOPDAEMON)] = DAEMON_ARG_LEN,
2035 [SET_CMDID(IP_VS_SO_SET_ZERO)] = SERVICE_ARG_LEN,
2036};
2037
2038static void ip_vs_copy_usvc_compat(struct ip_vs_service_user_kern *usvc,
2039 struct ip_vs_service_user *usvc_compat)
2040{
2041 usvc->af = AF_INET;
2042 usvc->protocol = usvc_compat->protocol;
2043 usvc->addr.ip = usvc_compat->addr;
2044 usvc->port = usvc_compat->port;
2045 usvc->fwmark = usvc_compat->fwmark;
2046
2047 /* Deep copy of sched_name is not needed here */
2048 usvc->sched_name = usvc_compat->sched_name;
2049
2050 usvc->flags = usvc_compat->flags;
2051 usvc->timeout = usvc_compat->timeout;
2052 usvc->netmask = usvc_compat->netmask;
2053}
2054
2055static void ip_vs_copy_udest_compat(struct ip_vs_dest_user_kern *udest,
2056 struct ip_vs_dest_user *udest_compat)
2057{
2058 udest->addr.ip = udest_compat->addr;
2059 udest->port = udest_compat->port;
2060 udest->conn_flags = udest_compat->conn_flags;
2061 udest->weight = udest_compat->weight;
2062 udest->u_threshold = udest_compat->u_threshold;
2063 udest->l_threshold = udest_compat->l_threshold;
2064}
2065
2066static int
2067do_ip_vs_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len)
2068{
2069 int ret;
2070 unsigned char arg[MAX_ARG_LEN];
2071 struct ip_vs_service_user *usvc_compat;
2072 struct ip_vs_service_user_kern usvc;
2073 struct ip_vs_service *svc;
2074 struct ip_vs_dest_user *udest_compat;
2075 struct ip_vs_dest_user_kern udest;
2076
2077 if (!capable(CAP_NET_ADMIN))
2078 return -EPERM;
2079
2080 if (len != set_arglen[SET_CMDID(cmd)]) {
2081 pr_err("set_ctl: len %u != %u\n",
2082 len, set_arglen[SET_CMDID(cmd)]);
2083 return -EINVAL;
2084 }
2085
2086 if (copy_from_user(arg, user, len) != 0)
2087 return -EFAULT;
2088
2089 /* increase the module use count */
2090 ip_vs_use_count_inc();
2091
2092 if (mutex_lock_interruptible(&__ip_vs_mutex)) {
2093 ret = -ERESTARTSYS;
2094 goto out_dec;
2095 }
2096
2097 if (cmd == IP_VS_SO_SET_FLUSH) {
2098 /* Flush the virtual service */
2099 ret = ip_vs_flush();
2100 goto out_unlock;
2101 } else if (cmd == IP_VS_SO_SET_TIMEOUT) {
2102 /* Set timeout values for (tcp tcpfin udp) */
2103 ret = ip_vs_set_timeout((struct ip_vs_timeout_user *)arg);
2104 goto out_unlock;
2105 } else if (cmd == IP_VS_SO_SET_STARTDAEMON) {
2106 struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg;
2107 ret = start_sync_thread(dm->state, dm->mcast_ifn, dm->syncid);
2108 goto out_unlock;
2109 } else if (cmd == IP_VS_SO_SET_STOPDAEMON) {
2110 struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg;
2111 ret = stop_sync_thread(dm->state);
2112 goto out_unlock;
2113 }
2114
2115 usvc_compat = (struct ip_vs_service_user *)arg;
2116 udest_compat = (struct ip_vs_dest_user *)(usvc_compat + 1);
2117
2118 /* We only use the new structs internally, so copy userspace compat
2119 * structs to extended internal versions */
2120 ip_vs_copy_usvc_compat(&usvc, usvc_compat);
2121 ip_vs_copy_udest_compat(&udest, udest_compat);
2122
2123 if (cmd == IP_VS_SO_SET_ZERO) {
2124 /* if no service address is set, zero counters in all */
2125 if (!usvc.fwmark && !usvc.addr.ip && !usvc.port) {
2126 ret = ip_vs_zero_all();
2127 goto out_unlock;
2128 }
2129 }
2130
2131 /* Check for valid protocol: TCP or UDP, even for fwmark!=0 */
2132 if (usvc.protocol != IPPROTO_TCP && usvc.protocol != IPPROTO_UDP) {
2133 pr_err("set_ctl: invalid protocol: %d %pI4:%d %s\n",
2134 usvc.protocol, &usvc.addr.ip,
2135 ntohs(usvc.port), usvc.sched_name);
2136 ret = -EFAULT;
2137 goto out_unlock;
2138 }
2139
2140 /* Lookup the exact service by <protocol, addr, port> or fwmark */
2141 if (usvc.fwmark == 0)
2142 svc = __ip_vs_service_get(usvc.af, usvc.protocol,
2143 &usvc.addr, usvc.port);
2144 else
2145 svc = __ip_vs_svc_fwm_get(usvc.af, usvc.fwmark);
2146
2147 if (cmd != IP_VS_SO_SET_ADD
2148 && (svc == NULL || svc->protocol != usvc.protocol)) {
2149 ret = -ESRCH;
2150 goto out_unlock;
2151 }
2152
2153 switch (cmd) {
2154 case IP_VS_SO_SET_ADD:
2155 if (svc != NULL)
2156 ret = -EEXIST;
2157 else
2158 ret = ip_vs_add_service(&usvc, &svc);
2159 break;
2160 case IP_VS_SO_SET_EDIT:
2161 ret = ip_vs_edit_service(svc, &usvc);
2162 break;
2163 case IP_VS_SO_SET_DEL:
2164 ret = ip_vs_del_service(svc);
2165 if (!ret)
2166 goto out_unlock;
2167 break;
2168 case IP_VS_SO_SET_ZERO:
2169 ret = ip_vs_zero_service(svc);
2170 break;
2171 case IP_VS_SO_SET_ADDDEST:
2172 ret = ip_vs_add_dest(svc, &udest);
2173 break;
2174 case IP_VS_SO_SET_EDITDEST:
2175 ret = ip_vs_edit_dest(svc, &udest);
2176 break;
2177 case IP_VS_SO_SET_DELDEST:
2178 ret = ip_vs_del_dest(svc, &udest);
2179 break;
2180 default:
2181 ret = -EINVAL;
2182 }
2183
2184 if (svc)
2185 ip_vs_service_put(svc);
2186
2187 out_unlock:
2188 mutex_unlock(&__ip_vs_mutex);
2189 out_dec:
2190 /* decrease the module use count */
2191 ip_vs_use_count_dec();
2192
2193 return ret;
2194}
2195
2196
2197static void
2198ip_vs_copy_stats(struct ip_vs_stats_user *dst, struct ip_vs_stats *src)
2199{
2200 spin_lock_bh(&src->lock);
2201 memcpy(dst, &src->ustats, sizeof(*dst));
2202 spin_unlock_bh(&src->lock);
2203}
2204
2205static void
2206ip_vs_copy_service(struct ip_vs_service_entry *dst, struct ip_vs_service *src)
2207{
2208 dst->protocol = src->protocol;
2209 dst->addr = src->addr.ip;
2210 dst->port = src->port;
2211 dst->fwmark = src->fwmark;
2212 strlcpy(dst->sched_name, src->scheduler->name, sizeof(dst->sched_name));
2213 dst->flags = src->flags;
2214 dst->timeout = src->timeout / HZ;
2215 dst->netmask = src->netmask;
2216 dst->num_dests = src->num_dests;
2217 ip_vs_copy_stats(&dst->stats, &src->stats);
2218}
2219
2220static inline int
2221__ip_vs_get_service_entries(const struct ip_vs_get_services *get,
2222 struct ip_vs_get_services __user *uptr)
2223{
2224 int idx, count=0;
2225 struct ip_vs_service *svc;
2226 struct ip_vs_service_entry entry;
2227 int ret = 0;
2228
2229 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
2230 list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
2231 /* Only expose IPv4 entries to old interface */
2232 if (svc->af != AF_INET)
2233 continue;
2234
2235 if (count >= get->num_services)
2236 goto out;
2237 memset(&entry, 0, sizeof(entry));
2238 ip_vs_copy_service(&entry, svc);
2239 if (copy_to_user(&uptr->entrytable[count],
2240 &entry, sizeof(entry))) {
2241 ret = -EFAULT;
2242 goto out;
2243 }
2244 count++;
2245 }
2246 }
2247
2248 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
2249 list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
2250 /* Only expose IPv4 entries to old interface */
2251 if (svc->af != AF_INET)
2252 continue;
2253
2254 if (count >= get->num_services)
2255 goto out;
2256 memset(&entry, 0, sizeof(entry));
2257 ip_vs_copy_service(&entry, svc);
2258 if (copy_to_user(&uptr->entrytable[count],
2259 &entry, sizeof(entry))) {
2260 ret = -EFAULT;
2261 goto out;
2262 }
2263 count++;
2264 }
2265 }
2266 out:
2267 return ret;
2268}
2269
2270static inline int
2271__ip_vs_get_dest_entries(const struct ip_vs_get_dests *get,
2272 struct ip_vs_get_dests __user *uptr)
2273{
2274 struct ip_vs_service *svc;
2275 union nf_inet_addr addr = { .ip = get->addr };
2276 int ret = 0;
2277
2278 if (get->fwmark)
2279 svc = __ip_vs_svc_fwm_get(AF_INET, get->fwmark);
2280 else
2281 svc = __ip_vs_service_get(AF_INET, get->protocol, &addr,
2282 get->port);
2283
2284 if (svc) {
2285 int count = 0;
2286 struct ip_vs_dest *dest;
2287 struct ip_vs_dest_entry entry;
2288
2289 list_for_each_entry(dest, &svc->destinations, n_list) {
2290 if (count >= get->num_dests)
2291 break;
2292
2293 entry.addr = dest->addr.ip;
2294 entry.port = dest->port;
2295 entry.conn_flags = atomic_read(&dest->conn_flags);
2296 entry.weight = atomic_read(&dest->weight);
2297 entry.u_threshold = dest->u_threshold;
2298 entry.l_threshold = dest->l_threshold;
2299 entry.activeconns = atomic_read(&dest->activeconns);
2300 entry.inactconns = atomic_read(&dest->inactconns);
2301 entry.persistconns = atomic_read(&dest->persistconns);
2302 ip_vs_copy_stats(&entry.stats, &dest->stats);
2303 if (copy_to_user(&uptr->entrytable[count],
2304 &entry, sizeof(entry))) {
2305 ret = -EFAULT;
2306 break;
2307 }
2308 count++;
2309 }
2310 ip_vs_service_put(svc);
2311 } else
2312 ret = -ESRCH;
2313 return ret;
2314}
2315
2316static inline void
2317__ip_vs_get_timeouts(struct ip_vs_timeout_user *u)
2318{
2319#ifdef CONFIG_IP_VS_PROTO_TCP
2320 u->tcp_timeout =
2321 ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_ESTABLISHED] / HZ;
2322 u->tcp_fin_timeout =
2323 ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_FIN_WAIT] / HZ;
2324#endif
2325#ifdef CONFIG_IP_VS_PROTO_UDP
2326 u->udp_timeout =
2327 ip_vs_protocol_udp.timeout_table[IP_VS_UDP_S_NORMAL] / HZ;
2328#endif
2329}
2330
2331
2332#define GET_CMDID(cmd) (cmd - IP_VS_BASE_CTL)
2333#define GET_INFO_ARG_LEN (sizeof(struct ip_vs_getinfo))
2334#define GET_SERVICES_ARG_LEN (sizeof(struct ip_vs_get_services))
2335#define GET_SERVICE_ARG_LEN (sizeof(struct ip_vs_service_entry))
2336#define GET_DESTS_ARG_LEN (sizeof(struct ip_vs_get_dests))
2337#define GET_TIMEOUT_ARG_LEN (sizeof(struct ip_vs_timeout_user))
2338#define GET_DAEMON_ARG_LEN (sizeof(struct ip_vs_daemon_user) * 2)
2339
2340static const unsigned char get_arglen[GET_CMDID(IP_VS_SO_GET_MAX)+1] = {
2341 [GET_CMDID(IP_VS_SO_GET_VERSION)] = 64,
2342 [GET_CMDID(IP_VS_SO_GET_INFO)] = GET_INFO_ARG_LEN,
2343 [GET_CMDID(IP_VS_SO_GET_SERVICES)] = GET_SERVICES_ARG_LEN,
2344 [GET_CMDID(IP_VS_SO_GET_SERVICE)] = GET_SERVICE_ARG_LEN,
2345 [GET_CMDID(IP_VS_SO_GET_DESTS)] = GET_DESTS_ARG_LEN,
2346 [GET_CMDID(IP_VS_SO_GET_TIMEOUT)] = GET_TIMEOUT_ARG_LEN,
2347 [GET_CMDID(IP_VS_SO_GET_DAEMON)] = GET_DAEMON_ARG_LEN,
2348};
2349
2350static int
2351do_ip_vs_get_ctl(struct sock *sk, int cmd, void __user *user, int *len)
2352{
2353 unsigned char arg[128];
2354 int ret = 0;
2355
2356 if (!capable(CAP_NET_ADMIN))
2357 return -EPERM;
2358
2359 if (*len < get_arglen[GET_CMDID(cmd)]) {
2360 pr_err("get_ctl: len %u < %u\n",
2361 *len, get_arglen[GET_CMDID(cmd)]);
2362 return -EINVAL;
2363 }
2364
2365 if (copy_from_user(arg, user, get_arglen[GET_CMDID(cmd)]) != 0)
2366 return -EFAULT;
2367
2368 if (mutex_lock_interruptible(&__ip_vs_mutex))
2369 return -ERESTARTSYS;
2370
2371 switch (cmd) {
2372 case IP_VS_SO_GET_VERSION:
2373 {
2374 char buf[64];
2375
2376 sprintf(buf, "IP Virtual Server version %d.%d.%d (size=%d)",
2377 NVERSION(IP_VS_VERSION_CODE), IP_VS_CONN_TAB_SIZE);
2378 if (copy_to_user(user, buf, strlen(buf)+1) != 0) {
2379 ret = -EFAULT;
2380 goto out;
2381 }
2382 *len = strlen(buf)+1;
2383 }
2384 break;
2385
2386 case IP_VS_SO_GET_INFO:
2387 {
2388 struct ip_vs_getinfo info;
2389 info.version = IP_VS_VERSION_CODE;
2390 info.size = IP_VS_CONN_TAB_SIZE;
2391 info.num_services = ip_vs_num_services;
2392 if (copy_to_user(user, &info, sizeof(info)) != 0)
2393 ret = -EFAULT;
2394 }
2395 break;
2396
2397 case IP_VS_SO_GET_SERVICES:
2398 {
2399 struct ip_vs_get_services *get;
2400 int size;
2401
2402 get = (struct ip_vs_get_services *)arg;
2403 size = sizeof(*get) +
2404 sizeof(struct ip_vs_service_entry) * get->num_services;
2405 if (*len != size) {
2406 pr_err("length: %u != %u\n", *len, size);
2407 ret = -EINVAL;
2408 goto out;
2409 }
2410 ret = __ip_vs_get_service_entries(get, user);
2411 }
2412 break;
2413
2414 case IP_VS_SO_GET_SERVICE:
2415 {
2416 struct ip_vs_service_entry *entry;
2417 struct ip_vs_service *svc;
2418 union nf_inet_addr addr;
2419
2420 entry = (struct ip_vs_service_entry *)arg;
2421 addr.ip = entry->addr;
2422 if (entry->fwmark)
2423 svc = __ip_vs_svc_fwm_get(AF_INET, entry->fwmark);
2424 else
2425 svc = __ip_vs_service_get(AF_INET, entry->protocol,
2426 &addr, entry->port);
2427 if (svc) {
2428 ip_vs_copy_service(entry, svc);
2429 if (copy_to_user(user, entry, sizeof(*entry)) != 0)
2430 ret = -EFAULT;
2431 ip_vs_service_put(svc);
2432 } else
2433 ret = -ESRCH;
2434 }
2435 break;
2436
2437 case IP_VS_SO_GET_DESTS:
2438 {
2439 struct ip_vs_get_dests *get;
2440 int size;
2441
2442 get = (struct ip_vs_get_dests *)arg;
2443 size = sizeof(*get) +
2444 sizeof(struct ip_vs_dest_entry) * get->num_dests;
2445 if (*len != size) {
2446 pr_err("length: %u != %u\n", *len, size);
2447 ret = -EINVAL;
2448 goto out;
2449 }
2450 ret = __ip_vs_get_dest_entries(get, user);
2451 }
2452 break;
2453
2454 case IP_VS_SO_GET_TIMEOUT:
2455 {
2456 struct ip_vs_timeout_user t;
2457
2458 __ip_vs_get_timeouts(&t);
2459 if (copy_to_user(user, &t, sizeof(t)) != 0)
2460 ret = -EFAULT;
2461 }
2462 break;
2463
2464 case IP_VS_SO_GET_DAEMON:
2465 {
2466 struct ip_vs_daemon_user d[2];
2467
2468 memset(&d, 0, sizeof(d));
2469 if (ip_vs_sync_state & IP_VS_STATE_MASTER) {
2470 d[0].state = IP_VS_STATE_MASTER;
2471 strlcpy(d[0].mcast_ifn, ip_vs_master_mcast_ifn, sizeof(d[0].mcast_ifn));
2472 d[0].syncid = ip_vs_master_syncid;
2473 }
2474 if (ip_vs_sync_state & IP_VS_STATE_BACKUP) {
2475 d[1].state = IP_VS_STATE_BACKUP;
2476 strlcpy(d[1].mcast_ifn, ip_vs_backup_mcast_ifn, sizeof(d[1].mcast_ifn));
2477 d[1].syncid = ip_vs_backup_syncid;
2478 }
2479 if (copy_to_user(user, &d, sizeof(d)) != 0)
2480 ret = -EFAULT;
2481 }
2482 break;
2483
2484 default:
2485 ret = -EINVAL;
2486 }
2487
2488 out:
2489 mutex_unlock(&__ip_vs_mutex);
2490 return ret;
2491}
2492
2493
2494static struct nf_sockopt_ops ip_vs_sockopts = {
2495 .pf = PF_INET,
2496 .set_optmin = IP_VS_BASE_CTL,
2497 .set_optmax = IP_VS_SO_SET_MAX+1,
2498 .set = do_ip_vs_set_ctl,
2499 .get_optmin = IP_VS_BASE_CTL,
2500 .get_optmax = IP_VS_SO_GET_MAX+1,
2501 .get = do_ip_vs_get_ctl,
2502 .owner = THIS_MODULE,
2503};
2504
2505/*
2506 * Generic Netlink interface
2507 */
2508
2509/* IPVS genetlink family */
2510static struct genl_family ip_vs_genl_family = {
2511 .id = GENL_ID_GENERATE,
2512 .hdrsize = 0,
2513 .name = IPVS_GENL_NAME,
2514 .version = IPVS_GENL_VERSION,
2515 .maxattr = IPVS_CMD_MAX,
2516};
2517
2518/* Policy used for first-level command attributes */
2519static const struct nla_policy ip_vs_cmd_policy[IPVS_CMD_ATTR_MAX + 1] = {
2520 [IPVS_CMD_ATTR_SERVICE] = { .type = NLA_NESTED },
2521 [IPVS_CMD_ATTR_DEST] = { .type = NLA_NESTED },
2522 [IPVS_CMD_ATTR_DAEMON] = { .type = NLA_NESTED },
2523 [IPVS_CMD_ATTR_TIMEOUT_TCP] = { .type = NLA_U32 },
2524 [IPVS_CMD_ATTR_TIMEOUT_TCP_FIN] = { .type = NLA_U32 },
2525 [IPVS_CMD_ATTR_TIMEOUT_UDP] = { .type = NLA_U32 },
2526};
2527
2528/* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DAEMON */
2529static const struct nla_policy ip_vs_daemon_policy[IPVS_DAEMON_ATTR_MAX + 1] = {
2530 [IPVS_DAEMON_ATTR_STATE] = { .type = NLA_U32 },
2531 [IPVS_DAEMON_ATTR_MCAST_IFN] = { .type = NLA_NUL_STRING,
2532 .len = IP_VS_IFNAME_MAXLEN },
2533 [IPVS_DAEMON_ATTR_SYNC_ID] = { .type = NLA_U32 },
2534};
2535
2536/* Policy used for attributes in nested attribute IPVS_CMD_ATTR_SERVICE */
2537static const struct nla_policy ip_vs_svc_policy[IPVS_SVC_ATTR_MAX + 1] = {
2538 [IPVS_SVC_ATTR_AF] = { .type = NLA_U16 },
2539 [IPVS_SVC_ATTR_PROTOCOL] = { .type = NLA_U16 },
2540 [IPVS_SVC_ATTR_ADDR] = { .type = NLA_BINARY,
2541 .len = sizeof(union nf_inet_addr) },
2542 [IPVS_SVC_ATTR_PORT] = { .type = NLA_U16 },
2543 [IPVS_SVC_ATTR_FWMARK] = { .type = NLA_U32 },
2544 [IPVS_SVC_ATTR_SCHED_NAME] = { .type = NLA_NUL_STRING,
2545 .len = IP_VS_SCHEDNAME_MAXLEN },
2546 [IPVS_SVC_ATTR_FLAGS] = { .type = NLA_BINARY,
2547 .len = sizeof(struct ip_vs_flags) },
2548 [IPVS_SVC_ATTR_TIMEOUT] = { .type = NLA_U32 },
2549 [IPVS_SVC_ATTR_NETMASK] = { .type = NLA_U32 },
2550 [IPVS_SVC_ATTR_STATS] = { .type = NLA_NESTED },
2551};
2552
2553/* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DEST */
2554static const struct nla_policy ip_vs_dest_policy[IPVS_DEST_ATTR_MAX + 1] = {
2555 [IPVS_DEST_ATTR_ADDR] = { .type = NLA_BINARY,
2556 .len = sizeof(union nf_inet_addr) },
2557 [IPVS_DEST_ATTR_PORT] = { .type = NLA_U16 },
2558 [IPVS_DEST_ATTR_FWD_METHOD] = { .type = NLA_U32 },
2559 [IPVS_DEST_ATTR_WEIGHT] = { .type = NLA_U32 },
2560 [IPVS_DEST_ATTR_U_THRESH] = { .type = NLA_U32 },
2561 [IPVS_DEST_ATTR_L_THRESH] = { .type = NLA_U32 },
2562 [IPVS_DEST_ATTR_ACTIVE_CONNS] = { .type = NLA_U32 },
2563 [IPVS_DEST_ATTR_INACT_CONNS] = { .type = NLA_U32 },
2564 [IPVS_DEST_ATTR_PERSIST_CONNS] = { .type = NLA_U32 },
2565 [IPVS_DEST_ATTR_STATS] = { .type = NLA_NESTED },
2566};
2567
2568static int ip_vs_genl_fill_stats(struct sk_buff *skb, int container_type,
2569 struct ip_vs_stats *stats)
2570{
2571 struct nlattr *nl_stats = nla_nest_start(skb, container_type);
2572 if (!nl_stats)
2573 return -EMSGSIZE;
2574
2575 spin_lock_bh(&stats->lock);
2576
2577 NLA_PUT_U32(skb, IPVS_STATS_ATTR_CONNS, stats->ustats.conns);
2578 NLA_PUT_U32(skb, IPVS_STATS_ATTR_INPKTS, stats->ustats.inpkts);
2579 NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTPKTS, stats->ustats.outpkts);
2580 NLA_PUT_U64(skb, IPVS_STATS_ATTR_INBYTES, stats->ustats.inbytes);
2581 NLA_PUT_U64(skb, IPVS_STATS_ATTR_OUTBYTES, stats->ustats.outbytes);
2582 NLA_PUT_U32(skb, IPVS_STATS_ATTR_CPS, stats->ustats.cps);
2583 NLA_PUT_U32(skb, IPVS_STATS_ATTR_INPPS, stats->ustats.inpps);
2584 NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTPPS, stats->ustats.outpps);
2585 NLA_PUT_U32(skb, IPVS_STATS_ATTR_INBPS, stats->ustats.inbps);
2586 NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTBPS, stats->ustats.outbps);
2587
2588 spin_unlock_bh(&stats->lock);
2589
2590 nla_nest_end(skb, nl_stats);
2591
2592 return 0;
2593
2594nla_put_failure:
2595 spin_unlock_bh(&stats->lock);
2596 nla_nest_cancel(skb, nl_stats);
2597 return -EMSGSIZE;
2598}
2599
2600static int ip_vs_genl_fill_service(struct sk_buff *skb,
2601 struct ip_vs_service *svc)
2602{
2603 struct nlattr *nl_service;
2604 struct ip_vs_flags flags = { .flags = svc->flags,
2605 .mask = ~0 };
2606
2607 nl_service = nla_nest_start(skb, IPVS_CMD_ATTR_SERVICE);
2608 if (!nl_service)
2609 return -EMSGSIZE;
2610
2611 NLA_PUT_U16(skb, IPVS_SVC_ATTR_AF, svc->af);
2612
2613 if (svc->fwmark) {
2614 NLA_PUT_U32(skb, IPVS_SVC_ATTR_FWMARK, svc->fwmark);
2615 } else {
2616 NLA_PUT_U16(skb, IPVS_SVC_ATTR_PROTOCOL, svc->protocol);
2617 NLA_PUT(skb, IPVS_SVC_ATTR_ADDR, sizeof(svc->addr), &svc->addr);
2618 NLA_PUT_U16(skb, IPVS_SVC_ATTR_PORT, svc->port);
2619 }
2620
2621 NLA_PUT_STRING(skb, IPVS_SVC_ATTR_SCHED_NAME, svc->scheduler->name);
2622 NLA_PUT(skb, IPVS_SVC_ATTR_FLAGS, sizeof(flags), &flags);
2623 NLA_PUT_U32(skb, IPVS_SVC_ATTR_TIMEOUT, svc->timeout / HZ);
2624 NLA_PUT_U32(skb, IPVS_SVC_ATTR_NETMASK, svc->netmask);
2625
2626 if (ip_vs_genl_fill_stats(skb, IPVS_SVC_ATTR_STATS, &svc->stats))
2627 goto nla_put_failure;
2628
2629 nla_nest_end(skb, nl_service);
2630
2631 return 0;
2632
2633nla_put_failure:
2634 nla_nest_cancel(skb, nl_service);
2635 return -EMSGSIZE;
2636}
2637
2638static int ip_vs_genl_dump_service(struct sk_buff *skb,
2639 struct ip_vs_service *svc,
2640 struct netlink_callback *cb)
2641{
2642 void *hdr;
2643
2644 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq,
2645 &ip_vs_genl_family, NLM_F_MULTI,
2646 IPVS_CMD_NEW_SERVICE);
2647 if (!hdr)
2648 return -EMSGSIZE;
2649
2650 if (ip_vs_genl_fill_service(skb, svc) < 0)
2651 goto nla_put_failure;
2652
2653 return genlmsg_end(skb, hdr);
2654
2655nla_put_failure:
2656 genlmsg_cancel(skb, hdr);
2657 return -EMSGSIZE;
2658}
2659
2660static int ip_vs_genl_dump_services(struct sk_buff *skb,
2661 struct netlink_callback *cb)
2662{
2663 int idx = 0, i;
2664 int start = cb->args[0];
2665 struct ip_vs_service *svc;
2666
2667 mutex_lock(&__ip_vs_mutex);
2668 for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) {
2669 list_for_each_entry(svc, &ip_vs_svc_table[i], s_list) {
2670 if (++idx <= start)
2671 continue;
2672 if (ip_vs_genl_dump_service(skb, svc, cb) < 0) {
2673 idx--;
2674 goto nla_put_failure;
2675 }
2676 }
2677 }
2678
2679 for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) {
2680 list_for_each_entry(svc, &ip_vs_svc_fwm_table[i], f_list) {
2681 if (++idx <= start)
2682 continue;
2683 if (ip_vs_genl_dump_service(skb, svc, cb) < 0) {
2684 idx--;
2685 goto nla_put_failure;
2686 }
2687 }
2688 }
2689
2690nla_put_failure:
2691 mutex_unlock(&__ip_vs_mutex);
2692 cb->args[0] = idx;
2693
2694 return skb->len;
2695}
2696
2697static int ip_vs_genl_parse_service(struct ip_vs_service_user_kern *usvc,
2698 struct nlattr *nla, int full_entry)
2699{
2700 struct nlattr *attrs[IPVS_SVC_ATTR_MAX + 1];
2701 struct nlattr *nla_af, *nla_port, *nla_fwmark, *nla_protocol, *nla_addr;
2702
2703 /* Parse mandatory identifying service fields first */
2704 if (nla == NULL ||
2705 nla_parse_nested(attrs, IPVS_SVC_ATTR_MAX, nla, ip_vs_svc_policy))
2706 return -EINVAL;
2707
2708 nla_af = attrs[IPVS_SVC_ATTR_AF];
2709 nla_protocol = attrs[IPVS_SVC_ATTR_PROTOCOL];
2710 nla_addr = attrs[IPVS_SVC_ATTR_ADDR];
2711 nla_port = attrs[IPVS_SVC_ATTR_PORT];
2712 nla_fwmark = attrs[IPVS_SVC_ATTR_FWMARK];
2713
2714 if (!(nla_af && (nla_fwmark || (nla_port && nla_protocol && nla_addr))))
2715 return -EINVAL;
2716
2717 usvc->af = nla_get_u16(nla_af);
2718#ifdef CONFIG_IP_VS_IPV6
2719 if (usvc->af != AF_INET && usvc->af != AF_INET6)
2720#else
2721 if (usvc->af != AF_INET)
2722#endif
2723 return -EAFNOSUPPORT;
2724
2725 if (nla_fwmark) {
2726 usvc->protocol = IPPROTO_TCP;
2727 usvc->fwmark = nla_get_u32(nla_fwmark);
2728 } else {
2729 usvc->protocol = nla_get_u16(nla_protocol);
2730 nla_memcpy(&usvc->addr, nla_addr, sizeof(usvc->addr));
2731 usvc->port = nla_get_u16(nla_port);
2732 usvc->fwmark = 0;
2733 }
2734
2735 /* If a full entry was requested, check for the additional fields */
2736 if (full_entry) {
2737 struct nlattr *nla_sched, *nla_flags, *nla_timeout,
2738 *nla_netmask;
2739 struct ip_vs_flags flags;
2740 struct ip_vs_service *svc;
2741
2742 nla_sched = attrs[IPVS_SVC_ATTR_SCHED_NAME];
2743 nla_flags = attrs[IPVS_SVC_ATTR_FLAGS];
2744 nla_timeout = attrs[IPVS_SVC_ATTR_TIMEOUT];
2745 nla_netmask = attrs[IPVS_SVC_ATTR_NETMASK];
2746
2747 if (!(nla_sched && nla_flags && nla_timeout && nla_netmask))
2748 return -EINVAL;
2749
2750 nla_memcpy(&flags, nla_flags, sizeof(flags));
2751
2752 /* prefill flags from service if it already exists */
2753 if (usvc->fwmark)
2754 svc = __ip_vs_svc_fwm_get(usvc->af, usvc->fwmark);
2755 else
2756 svc = __ip_vs_service_get(usvc->af, usvc->protocol,
2757 &usvc->addr, usvc->port);
2758 if (svc) {
2759 usvc->flags = svc->flags;
2760 ip_vs_service_put(svc);
2761 } else
2762 usvc->flags = 0;
2763
2764 /* set new flags from userland */
2765 usvc->flags = (usvc->flags & ~flags.mask) |
2766 (flags.flags & flags.mask);
2767 usvc->sched_name = nla_data(nla_sched);
2768 usvc->timeout = nla_get_u32(nla_timeout);
2769 usvc->netmask = nla_get_u32(nla_netmask);
2770 }
2771
2772 return 0;
2773}
2774
2775static struct ip_vs_service *ip_vs_genl_find_service(struct nlattr *nla)
2776{
2777 struct ip_vs_service_user_kern usvc;
2778 int ret;
2779
2780 ret = ip_vs_genl_parse_service(&usvc, nla, 0);
2781 if (ret)
2782 return ERR_PTR(ret);
2783
2784 if (usvc.fwmark)
2785 return __ip_vs_svc_fwm_get(usvc.af, usvc.fwmark);
2786 else
2787 return __ip_vs_service_get(usvc.af, usvc.protocol,
2788 &usvc.addr, usvc.port);
2789}
2790
2791static int ip_vs_genl_fill_dest(struct sk_buff *skb, struct ip_vs_dest *dest)
2792{
2793 struct nlattr *nl_dest;
2794
2795 nl_dest = nla_nest_start(skb, IPVS_CMD_ATTR_DEST);
2796 if (!nl_dest)
2797 return -EMSGSIZE;
2798
2799 NLA_PUT(skb, IPVS_DEST_ATTR_ADDR, sizeof(dest->addr), &dest->addr);
2800 NLA_PUT_U16(skb, IPVS_DEST_ATTR_PORT, dest->port);
2801
2802 NLA_PUT_U32(skb, IPVS_DEST_ATTR_FWD_METHOD,
2803 atomic_read(&dest->conn_flags) & IP_VS_CONN_F_FWD_MASK);
2804 NLA_PUT_U32(skb, IPVS_DEST_ATTR_WEIGHT, atomic_read(&dest->weight));
2805 NLA_PUT_U32(skb, IPVS_DEST_ATTR_U_THRESH, dest->u_threshold);
2806 NLA_PUT_U32(skb, IPVS_DEST_ATTR_L_THRESH, dest->l_threshold);
2807 NLA_PUT_U32(skb, IPVS_DEST_ATTR_ACTIVE_CONNS,
2808 atomic_read(&dest->activeconns));
2809 NLA_PUT_U32(skb, IPVS_DEST_ATTR_INACT_CONNS,
2810 atomic_read(&dest->inactconns));
2811 NLA_PUT_U32(skb, IPVS_DEST_ATTR_PERSIST_CONNS,
2812 atomic_read(&dest->persistconns));
2813
2814 if (ip_vs_genl_fill_stats(skb, IPVS_DEST_ATTR_STATS, &dest->stats))
2815 goto nla_put_failure;
2816
2817 nla_nest_end(skb, nl_dest);
2818
2819 return 0;
2820
2821nla_put_failure:
2822 nla_nest_cancel(skb, nl_dest);
2823 return -EMSGSIZE;
2824}
2825
2826static int ip_vs_genl_dump_dest(struct sk_buff *skb, struct ip_vs_dest *dest,
2827 struct netlink_callback *cb)
2828{
2829 void *hdr;
2830
2831 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq,
2832 &ip_vs_genl_family, NLM_F_MULTI,
2833 IPVS_CMD_NEW_DEST);
2834 if (!hdr)
2835 return -EMSGSIZE;
2836
2837 if (ip_vs_genl_fill_dest(skb, dest) < 0)
2838 goto nla_put_failure;
2839
2840 return genlmsg_end(skb, hdr);
2841
2842nla_put_failure:
2843 genlmsg_cancel(skb, hdr);
2844 return -EMSGSIZE;
2845}
2846
2847static int ip_vs_genl_dump_dests(struct sk_buff *skb,
2848 struct netlink_callback *cb)
2849{
2850 int idx = 0;
2851 int start = cb->args[0];
2852 struct ip_vs_service *svc;
2853 struct ip_vs_dest *dest;
2854 struct nlattr *attrs[IPVS_CMD_ATTR_MAX + 1];
2855
2856 mutex_lock(&__ip_vs_mutex);
2857
2858 /* Try to find the service for which to dump destinations */
2859 if (nlmsg_parse(cb->nlh, GENL_HDRLEN, attrs,
2860 IPVS_CMD_ATTR_MAX, ip_vs_cmd_policy))
2861 goto out_err;
2862
2863 svc = ip_vs_genl_find_service(attrs[IPVS_CMD_ATTR_SERVICE]);
2864 if (IS_ERR(svc) || svc == NULL)
2865 goto out_err;
2866
2867 /* Dump the destinations */
2868 list_for_each_entry(dest, &svc->destinations, n_list) {
2869 if (++idx <= start)
2870 continue;
2871 if (ip_vs_genl_dump_dest(skb, dest, cb) < 0) {
2872 idx--;
2873 goto nla_put_failure;
2874 }
2875 }
2876
2877nla_put_failure:
2878 cb->args[0] = idx;
2879 ip_vs_service_put(svc);
2880
2881out_err:
2882 mutex_unlock(&__ip_vs_mutex);
2883
2884 return skb->len;
2885}
2886
2887static int ip_vs_genl_parse_dest(struct ip_vs_dest_user_kern *udest,
2888 struct nlattr *nla, int full_entry)
2889{
2890 struct nlattr *attrs[IPVS_DEST_ATTR_MAX + 1];
2891 struct nlattr *nla_addr, *nla_port;
2892
2893 /* Parse mandatory identifying destination fields first */
2894 if (nla == NULL ||
2895 nla_parse_nested(attrs, IPVS_DEST_ATTR_MAX, nla, ip_vs_dest_policy))
2896 return -EINVAL;
2897
2898 nla_addr = attrs[IPVS_DEST_ATTR_ADDR];
2899 nla_port = attrs[IPVS_DEST_ATTR_PORT];
2900
2901 if (!(nla_addr && nla_port))
2902 return -EINVAL;
2903
2904 nla_memcpy(&udest->addr, nla_addr, sizeof(udest->addr));
2905 udest->port = nla_get_u16(nla_port);
2906
2907 /* If a full entry was requested, check for the additional fields */
2908 if (full_entry) {
2909 struct nlattr *nla_fwd, *nla_weight, *nla_u_thresh,
2910 *nla_l_thresh;
2911
2912 nla_fwd = attrs[IPVS_DEST_ATTR_FWD_METHOD];
2913 nla_weight = attrs[IPVS_DEST_ATTR_WEIGHT];
2914 nla_u_thresh = attrs[IPVS_DEST_ATTR_U_THRESH];
2915 nla_l_thresh = attrs[IPVS_DEST_ATTR_L_THRESH];
2916
2917 if (!(nla_fwd && nla_weight && nla_u_thresh && nla_l_thresh))
2918 return -EINVAL;
2919
2920 udest->conn_flags = nla_get_u32(nla_fwd)
2921 & IP_VS_CONN_F_FWD_MASK;
2922 udest->weight = nla_get_u32(nla_weight);
2923 udest->u_threshold = nla_get_u32(nla_u_thresh);
2924 udest->l_threshold = nla_get_u32(nla_l_thresh);
2925 }
2926
2927 return 0;
2928}
2929
2930static int ip_vs_genl_fill_daemon(struct sk_buff *skb, __be32 state,
2931 const char *mcast_ifn, __be32 syncid)
2932{
2933 struct nlattr *nl_daemon;
2934
2935 nl_daemon = nla_nest_start(skb, IPVS_CMD_ATTR_DAEMON);
2936 if (!nl_daemon)
2937 return -EMSGSIZE;
2938
2939 NLA_PUT_U32(skb, IPVS_DAEMON_ATTR_STATE, state);
2940 NLA_PUT_STRING(skb, IPVS_DAEMON_ATTR_MCAST_IFN, mcast_ifn);
2941 NLA_PUT_U32(skb, IPVS_DAEMON_ATTR_SYNC_ID, syncid);
2942
2943 nla_nest_end(skb, nl_daemon);
2944
2945 return 0;
2946
2947nla_put_failure:
2948 nla_nest_cancel(skb, nl_daemon);
2949 return -EMSGSIZE;
2950}
2951
2952static int ip_vs_genl_dump_daemon(struct sk_buff *skb, __be32 state,
2953 const char *mcast_ifn, __be32 syncid,
2954 struct netlink_callback *cb)
2955{
2956 void *hdr;
2957 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq,
2958 &ip_vs_genl_family, NLM_F_MULTI,
2959 IPVS_CMD_NEW_DAEMON);
2960 if (!hdr)
2961 return -EMSGSIZE;
2962
2963 if (ip_vs_genl_fill_daemon(skb, state, mcast_ifn, syncid))
2964 goto nla_put_failure;
2965
2966 return genlmsg_end(skb, hdr);
2967
2968nla_put_failure:
2969 genlmsg_cancel(skb, hdr);
2970 return -EMSGSIZE;
2971}
2972
2973static int ip_vs_genl_dump_daemons(struct sk_buff *skb,
2974 struct netlink_callback *cb)
2975{
2976 mutex_lock(&__ip_vs_mutex);
2977 if ((ip_vs_sync_state & IP_VS_STATE_MASTER) && !cb->args[0]) {
2978 if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_MASTER,
2979 ip_vs_master_mcast_ifn,
2980 ip_vs_master_syncid, cb) < 0)
2981 goto nla_put_failure;
2982
2983 cb->args[0] = 1;
2984 }
2985
2986 if ((ip_vs_sync_state & IP_VS_STATE_BACKUP) && !cb->args[1]) {
2987 if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_BACKUP,
2988 ip_vs_backup_mcast_ifn,
2989 ip_vs_backup_syncid, cb) < 0)
2990 goto nla_put_failure;
2991
2992 cb->args[1] = 1;
2993 }
2994
2995nla_put_failure:
2996 mutex_unlock(&__ip_vs_mutex);
2997
2998 return skb->len;
2999}
3000
3001static int ip_vs_genl_new_daemon(struct nlattr **attrs)
3002{
3003 if (!(attrs[IPVS_DAEMON_ATTR_STATE] &&
3004 attrs[IPVS_DAEMON_ATTR_MCAST_IFN] &&
3005 attrs[IPVS_DAEMON_ATTR_SYNC_ID]))
3006 return -EINVAL;
3007
3008 return start_sync_thread(nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]),
3009 nla_data(attrs[IPVS_DAEMON_ATTR_MCAST_IFN]),
3010 nla_get_u32(attrs[IPVS_DAEMON_ATTR_SYNC_ID]));
3011}
3012
3013static int ip_vs_genl_del_daemon(struct nlattr **attrs)
3014{
3015 if (!attrs[IPVS_DAEMON_ATTR_STATE])
3016 return -EINVAL;
3017
3018 return stop_sync_thread(nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]));
3019}
3020
3021static int ip_vs_genl_set_config(struct nlattr **attrs)
3022{
3023 struct ip_vs_timeout_user t;
3024
3025 __ip_vs_get_timeouts(&t);
3026
3027 if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP])
3028 t.tcp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP]);
3029
3030 if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN])
3031 t.tcp_fin_timeout =
3032 nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN]);
3033
3034 if (attrs[IPVS_CMD_ATTR_TIMEOUT_UDP])
3035 t.udp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_UDP]);
3036
3037 return ip_vs_set_timeout(&t);
3038}
3039
3040static int ip_vs_genl_set_cmd(struct sk_buff *skb, struct genl_info *info)
3041{
3042 struct ip_vs_service *svc = NULL;
3043 struct ip_vs_service_user_kern usvc;
3044 struct ip_vs_dest_user_kern udest;
3045 int ret = 0, cmd;
3046 int need_full_svc = 0, need_full_dest = 0;
3047
3048 cmd = info->genlhdr->cmd;
3049
3050 mutex_lock(&__ip_vs_mutex);
3051
3052 if (cmd == IPVS_CMD_FLUSH) {
3053 ret = ip_vs_flush();
3054 goto out;
3055 } else if (cmd == IPVS_CMD_SET_CONFIG) {
3056 ret = ip_vs_genl_set_config(info->attrs);
3057 goto out;
3058 } else if (cmd == IPVS_CMD_NEW_DAEMON ||
3059 cmd == IPVS_CMD_DEL_DAEMON) {
3060
3061 struct nlattr *daemon_attrs[IPVS_DAEMON_ATTR_MAX + 1];
3062
3063 if (!info->attrs[IPVS_CMD_ATTR_DAEMON] ||
3064 nla_parse_nested(daemon_attrs, IPVS_DAEMON_ATTR_MAX,
3065 info->attrs[IPVS_CMD_ATTR_DAEMON],
3066 ip_vs_daemon_policy)) {
3067 ret = -EINVAL;
3068 goto out;
3069 }
3070
3071 if (cmd == IPVS_CMD_NEW_DAEMON)
3072 ret = ip_vs_genl_new_daemon(daemon_attrs);
3073 else
3074 ret = ip_vs_genl_del_daemon(daemon_attrs);
3075 goto out;
3076 } else if (cmd == IPVS_CMD_ZERO &&
3077 !info->attrs[IPVS_CMD_ATTR_SERVICE]) {
3078 ret = ip_vs_zero_all();
3079 goto out;
3080 }
3081
3082 /* All following commands require a service argument, so check if we
3083 * received a valid one. We need a full service specification when
3084 * adding / editing a service. Only identifying members otherwise. */
3085 if (cmd == IPVS_CMD_NEW_SERVICE || cmd == IPVS_CMD_SET_SERVICE)
3086 need_full_svc = 1;
3087
3088 ret = ip_vs_genl_parse_service(&usvc,
3089 info->attrs[IPVS_CMD_ATTR_SERVICE],
3090 need_full_svc);
3091 if (ret)
3092 goto out;
3093
3094 /* Lookup the exact service by <protocol, addr, port> or fwmark */
3095 if (usvc.fwmark == 0)
3096 svc = __ip_vs_service_get(usvc.af, usvc.protocol,
3097 &usvc.addr, usvc.port);
3098 else
3099 svc = __ip_vs_svc_fwm_get(usvc.af, usvc.fwmark);
3100
3101 /* Unless we're adding a new service, the service must already exist */
3102 if ((cmd != IPVS_CMD_NEW_SERVICE) && (svc == NULL)) {
3103 ret = -ESRCH;
3104 goto out;
3105 }
3106
3107 /* Destination commands require a valid destination argument. For
3108 * adding / editing a destination, we need a full destination
3109 * specification. */
3110 if (cmd == IPVS_CMD_NEW_DEST || cmd == IPVS_CMD_SET_DEST ||
3111 cmd == IPVS_CMD_DEL_DEST) {
3112 if (cmd != IPVS_CMD_DEL_DEST)
3113 need_full_dest = 1;
3114
3115 ret = ip_vs_genl_parse_dest(&udest,
3116 info->attrs[IPVS_CMD_ATTR_DEST],
3117 need_full_dest);
3118 if (ret)
3119 goto out;
3120 }
3121
3122 switch (cmd) {
3123 case IPVS_CMD_NEW_SERVICE:
3124 if (svc == NULL)
3125 ret = ip_vs_add_service(&usvc, &svc);
3126 else
3127 ret = -EEXIST;
3128 break;
3129 case IPVS_CMD_SET_SERVICE:
3130 ret = ip_vs_edit_service(svc, &usvc);
3131 break;
3132 case IPVS_CMD_DEL_SERVICE:
3133 ret = ip_vs_del_service(svc);
3134 break;
3135 case IPVS_CMD_NEW_DEST:
3136 ret = ip_vs_add_dest(svc, &udest);
3137 break;
3138 case IPVS_CMD_SET_DEST:
3139 ret = ip_vs_edit_dest(svc, &udest);
3140 break;
3141 case IPVS_CMD_DEL_DEST:
3142 ret = ip_vs_del_dest(svc, &udest);
3143 break;
3144 case IPVS_CMD_ZERO:
3145 ret = ip_vs_zero_service(svc);
3146 break;
3147 default:
3148 ret = -EINVAL;
3149 }
3150
3151out:
3152 if (svc)
3153 ip_vs_service_put(svc);
3154 mutex_unlock(&__ip_vs_mutex);
3155
3156 return ret;
3157}
3158
3159static int ip_vs_genl_get_cmd(struct sk_buff *skb, struct genl_info *info)
3160{
3161 struct sk_buff *msg;
3162 void *reply;
3163 int ret, cmd, reply_cmd;
3164
3165 cmd = info->genlhdr->cmd;
3166
3167 if (cmd == IPVS_CMD_GET_SERVICE)
3168 reply_cmd = IPVS_CMD_NEW_SERVICE;
3169 else if (cmd == IPVS_CMD_GET_INFO)
3170 reply_cmd = IPVS_CMD_SET_INFO;
3171 else if (cmd == IPVS_CMD_GET_CONFIG)
3172 reply_cmd = IPVS_CMD_SET_CONFIG;
3173 else {
3174 pr_err("unknown Generic Netlink command\n");
3175 return -EINVAL;
3176 }
3177
3178 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3179 if (!msg)
3180 return -ENOMEM;
3181
3182 mutex_lock(&__ip_vs_mutex);
3183
3184 reply = genlmsg_put_reply(msg, info, &ip_vs_genl_family, 0, reply_cmd);
3185 if (reply == NULL)
3186 goto nla_put_failure;
3187
3188 switch (cmd) {
3189 case IPVS_CMD_GET_SERVICE:
3190 {
3191 struct ip_vs_service *svc;
3192
3193 svc = ip_vs_genl_find_service(info->attrs[IPVS_CMD_ATTR_SERVICE]);
3194 if (IS_ERR(svc)) {
3195 ret = PTR_ERR(svc);
3196 goto out_err;
3197 } else if (svc) {
3198 ret = ip_vs_genl_fill_service(msg, svc);
3199 ip_vs_service_put(svc);
3200 if (ret)
3201 goto nla_put_failure;
3202 } else {
3203 ret = -ESRCH;
3204 goto out_err;
3205 }
3206
3207 break;
3208 }
3209
3210 case IPVS_CMD_GET_CONFIG:
3211 {
3212 struct ip_vs_timeout_user t;
3213
3214 __ip_vs_get_timeouts(&t);
3215#ifdef CONFIG_IP_VS_PROTO_TCP
3216 NLA_PUT_U32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP, t.tcp_timeout);
3217 NLA_PUT_U32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP_FIN,
3218 t.tcp_fin_timeout);
3219#endif
3220#ifdef CONFIG_IP_VS_PROTO_UDP
3221 NLA_PUT_U32(msg, IPVS_CMD_ATTR_TIMEOUT_UDP, t.udp_timeout);
3222#endif
3223
3224 break;
3225 }
3226
3227 case IPVS_CMD_GET_INFO:
3228 NLA_PUT_U32(msg, IPVS_INFO_ATTR_VERSION, IP_VS_VERSION_CODE);
3229 NLA_PUT_U32(msg, IPVS_INFO_ATTR_CONN_TAB_SIZE,
3230 IP_VS_CONN_TAB_SIZE);
3231 break;
3232 }
3233
3234 genlmsg_end(msg, reply);
3235 ret = genlmsg_reply(msg, info);
3236 goto out;
3237
3238nla_put_failure:
3239 pr_err("not enough space in Netlink message\n");
3240 ret = -EMSGSIZE;
3241
3242out_err:
3243 nlmsg_free(msg);
3244out:
3245 mutex_unlock(&__ip_vs_mutex);
3246
3247 return ret;
3248}
3249
3250
3251static struct genl_ops ip_vs_genl_ops[] __read_mostly = {
3252 {
3253 .cmd = IPVS_CMD_NEW_SERVICE,
3254 .flags = GENL_ADMIN_PERM,
3255 .policy = ip_vs_cmd_policy,
3256 .doit = ip_vs_genl_set_cmd,
3257 },
3258 {
3259 .cmd = IPVS_CMD_SET_SERVICE,
3260 .flags = GENL_ADMIN_PERM,
3261 .policy = ip_vs_cmd_policy,
3262 .doit = ip_vs_genl_set_cmd,
3263 },
3264 {
3265 .cmd = IPVS_CMD_DEL_SERVICE,
3266 .flags = GENL_ADMIN_PERM,
3267 .policy = ip_vs_cmd_policy,
3268 .doit = ip_vs_genl_set_cmd,
3269 },
3270 {
3271 .cmd = IPVS_CMD_GET_SERVICE,
3272 .flags = GENL_ADMIN_PERM,
3273 .doit = ip_vs_genl_get_cmd,
3274 .dumpit = ip_vs_genl_dump_services,
3275 .policy = ip_vs_cmd_policy,
3276 },
3277 {
3278 .cmd = IPVS_CMD_NEW_DEST,
3279 .flags = GENL_ADMIN_PERM,
3280 .policy = ip_vs_cmd_policy,
3281 .doit = ip_vs_genl_set_cmd,
3282 },
3283 {
3284 .cmd = IPVS_CMD_SET_DEST,
3285 .flags = GENL_ADMIN_PERM,
3286 .policy = ip_vs_cmd_policy,
3287 .doit = ip_vs_genl_set_cmd,
3288 },
3289 {
3290 .cmd = IPVS_CMD_DEL_DEST,
3291 .flags = GENL_ADMIN_PERM,
3292 .policy = ip_vs_cmd_policy,
3293 .doit = ip_vs_genl_set_cmd,
3294 },
3295 {
3296 .cmd = IPVS_CMD_GET_DEST,
3297 .flags = GENL_ADMIN_PERM,
3298 .policy = ip_vs_cmd_policy,
3299 .dumpit = ip_vs_genl_dump_dests,
3300 },
3301 {
3302 .cmd = IPVS_CMD_NEW_DAEMON,
3303 .flags = GENL_ADMIN_PERM,
3304 .policy = ip_vs_cmd_policy,
3305 .doit = ip_vs_genl_set_cmd,
3306 },
3307 {
3308 .cmd = IPVS_CMD_DEL_DAEMON,
3309 .flags = GENL_ADMIN_PERM,
3310 .policy = ip_vs_cmd_policy,
3311 .doit = ip_vs_genl_set_cmd,
3312 },
3313 {
3314 .cmd = IPVS_CMD_GET_DAEMON,
3315 .flags = GENL_ADMIN_PERM,
3316 .dumpit = ip_vs_genl_dump_daemons,
3317 },
3318 {
3319 .cmd = IPVS_CMD_SET_CONFIG,
3320 .flags = GENL_ADMIN_PERM,
3321 .policy = ip_vs_cmd_policy,
3322 .doit = ip_vs_genl_set_cmd,
3323 },
3324 {
3325 .cmd = IPVS_CMD_GET_CONFIG,
3326 .flags = GENL_ADMIN_PERM,
3327 .doit = ip_vs_genl_get_cmd,
3328 },
3329 {
3330 .cmd = IPVS_CMD_GET_INFO,
3331 .flags = GENL_ADMIN_PERM,
3332 .doit = ip_vs_genl_get_cmd,
3333 },
3334 {
3335 .cmd = IPVS_CMD_ZERO,
3336 .flags = GENL_ADMIN_PERM,
3337 .policy = ip_vs_cmd_policy,
3338 .doit = ip_vs_genl_set_cmd,
3339 },
3340 {
3341 .cmd = IPVS_CMD_FLUSH,
3342 .flags = GENL_ADMIN_PERM,
3343 .doit = ip_vs_genl_set_cmd,
3344 },
3345};
3346
3347static int __init ip_vs_genl_register(void)
3348{
3349 return genl_register_family_with_ops(&ip_vs_genl_family,
3350 ip_vs_genl_ops, ARRAY_SIZE(ip_vs_genl_ops));
3351}
3352
3353static void ip_vs_genl_unregister(void)
3354{
3355 genl_unregister_family(&ip_vs_genl_family);
3356}
3357
3358/* End of Generic Netlink interface definitions */
3359
3360
3361int __init ip_vs_control_init(void)
3362{
3363 int ret;
3364 int idx;
3365
3366 EnterFunction(2);
3367
3368 ret = nf_register_sockopt(&ip_vs_sockopts);
3369 if (ret) {
3370 pr_err("cannot register sockopt.\n");
3371 return ret;
3372 }
3373
3374 ret = ip_vs_genl_register();
3375 if (ret) {
3376 pr_err("cannot register Generic Netlink interface.\n");
3377 nf_unregister_sockopt(&ip_vs_sockopts);
3378 return ret;
3379 }
3380
3381 proc_net_fops_create(&init_net, "ip_vs", 0, &ip_vs_info_fops);
3382 proc_net_fops_create(&init_net, "ip_vs_stats",0, &ip_vs_stats_fops);
3383
3384 sysctl_header = register_sysctl_paths(net_vs_ctl_path, vs_vars);
3385
3386 /* Initialize ip_vs_svc_table, ip_vs_svc_fwm_table, ip_vs_rtable */
3387 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
3388 INIT_LIST_HEAD(&ip_vs_svc_table[idx]);
3389 INIT_LIST_HEAD(&ip_vs_svc_fwm_table[idx]);
3390 }
3391 for(idx = 0; idx < IP_VS_RTAB_SIZE; idx++) {
3392 INIT_LIST_HEAD(&ip_vs_rtable[idx]);
3393 }
3394
3395 ip_vs_new_estimator(&ip_vs_stats);
3396
3397 /* Hook the defense timer */
3398 schedule_delayed_work(&defense_work, DEFENSE_TIMER_PERIOD);
3399
3400 LeaveFunction(2);
3401 return 0;
3402}
3403
3404
3405void ip_vs_control_cleanup(void)
3406{
3407 EnterFunction(2);
3408 ip_vs_trash_cleanup();
3409 cancel_rearming_delayed_work(&defense_work);
3410 cancel_work_sync(&defense_work.work);
3411 ip_vs_kill_estimator(&ip_vs_stats);
3412 unregister_sysctl_table(sysctl_header);
3413 proc_net_remove(&init_net, "ip_vs_stats");
3414 proc_net_remove(&init_net, "ip_vs");
3415 ip_vs_genl_unregister();
3416 nf_unregister_sockopt(&ip_vs_sockopts);
3417 LeaveFunction(2);
3418}
Linux 6.x block layer and io_uring tree(s)