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
8 * Authors: Wensong Zhang <wensong@linuxvirtualserver.org>
9 * Peter Kese <peter.kese@ijs.si>
10 * Julian Anastasov <ja@ssi.bg>
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.
21 #include <linux/module.h>
22 #include <linux/init.h>
23 #include <linux/types.h>
24 #include <linux/capability.h>
26 #include <linux/sysctl.h>
27 #include <linux/proc_fs.h>
28 #include <linux/workqueue.h>
29 #include <linux/swap.h>
30 #include <linux/seq_file.h>
32 #include <linux/netfilter.h>
33 #include <linux/netfilter_ipv4.h>
34 #include <linux/mutex.h>
36 #include <net/net_namespace.h>
38 #ifdef CONFIG_IP_VS_IPV6
40 #include <net/ip6_route.h>
42 #include <net/route.h>
44 #include <net/genetlink.h>
46 #include <asm/uaccess.h>
48 #include <net/ip_vs.h>
50 /* semaphore for IPVS sockopts. And, [gs]etsockopt may sleep. */
51 static DEFINE_MUTEX(__ip_vs_mutex
);
53 /* lock for service table */
54 static DEFINE_RWLOCK(__ip_vs_svc_lock
);
56 /* lock for table with the real services */
57 static DEFINE_RWLOCK(__ip_vs_rs_lock
);
59 /* lock for state and timeout tables */
60 static DEFINE_RWLOCK(__ip_vs_securetcp_lock
);
62 /* lock for drop entry handling */
63 static DEFINE_SPINLOCK(__ip_vs_dropentry_lock
);
65 /* lock for drop packet handling */
66 static DEFINE_SPINLOCK(__ip_vs_droppacket_lock
);
68 /* 1/rate drop and drop-entry variables */
69 int ip_vs_drop_rate
= 0;
70 int ip_vs_drop_counter
= 0;
71 static atomic_t ip_vs_dropentry
= ATOMIC_INIT(0);
73 /* number of virtual services */
74 static int ip_vs_num_services
= 0;
76 /* sysctl variables */
77 static int sysctl_ip_vs_drop_entry
= 0;
78 static int sysctl_ip_vs_drop_packet
= 0;
79 static int sysctl_ip_vs_secure_tcp
= 0;
80 static int sysctl_ip_vs_amemthresh
= 1024;
81 static int sysctl_ip_vs_am_droprate
= 10;
82 int sysctl_ip_vs_cache_bypass
= 0;
83 int sysctl_ip_vs_expire_nodest_conn
= 0;
84 int sysctl_ip_vs_expire_quiescent_template
= 0;
85 int sysctl_ip_vs_sync_threshold
[2] = { 3, 50 };
86 int sysctl_ip_vs_nat_icmp_send
= 0;
89 #ifdef CONFIG_IP_VS_DEBUG
90 static int sysctl_ip_vs_debug_level
= 0;
92 int ip_vs_get_debug_level(void)
94 return sysctl_ip_vs_debug_level
;
98 #ifdef CONFIG_IP_VS_IPV6
99 /* Taken from rt6_fill_node() in net/ipv6/route.c, is there a better way? */
100 static int __ip_vs_addr_is_local_v6(const struct in6_addr
*addr
)
108 .saddr
= { .s6_addr32
= {0, 0, 0, 0} }, } },
111 rt
= (struct rt6_info
*)ip6_route_output(&init_net
, NULL
, &fl
);
112 if (rt
&& rt
->rt6i_dev
&& (rt
->rt6i_dev
->flags
& IFF_LOOPBACK
))
119 * update_defense_level is called from keventd and from sysctl,
120 * so it needs to protect itself from softirqs
122 static void update_defense_level(void)
125 static int old_secure_tcp
= 0;
130 /* we only count free and buffered memory (in pages) */
132 availmem
= i
.freeram
+ i
.bufferram
;
133 /* however in linux 2.5 the i.bufferram is total page cache size,
135 /* si_swapinfo(&i); */
136 /* availmem = availmem - (i.totalswap - i.freeswap); */
138 nomem
= (availmem
< sysctl_ip_vs_amemthresh
);
143 spin_lock(&__ip_vs_dropentry_lock
);
144 switch (sysctl_ip_vs_drop_entry
) {
146 atomic_set(&ip_vs_dropentry
, 0);
150 atomic_set(&ip_vs_dropentry
, 1);
151 sysctl_ip_vs_drop_entry
= 2;
153 atomic_set(&ip_vs_dropentry
, 0);
158 atomic_set(&ip_vs_dropentry
, 1);
160 atomic_set(&ip_vs_dropentry
, 0);
161 sysctl_ip_vs_drop_entry
= 1;
165 atomic_set(&ip_vs_dropentry
, 1);
168 spin_unlock(&__ip_vs_dropentry_lock
);
171 spin_lock(&__ip_vs_droppacket_lock
);
172 switch (sysctl_ip_vs_drop_packet
) {
178 ip_vs_drop_rate
= ip_vs_drop_counter
179 = sysctl_ip_vs_amemthresh
/
180 (sysctl_ip_vs_amemthresh
-availmem
);
181 sysctl_ip_vs_drop_packet
= 2;
188 ip_vs_drop_rate
= ip_vs_drop_counter
189 = sysctl_ip_vs_amemthresh
/
190 (sysctl_ip_vs_amemthresh
-availmem
);
193 sysctl_ip_vs_drop_packet
= 1;
197 ip_vs_drop_rate
= sysctl_ip_vs_am_droprate
;
200 spin_unlock(&__ip_vs_droppacket_lock
);
203 write_lock(&__ip_vs_securetcp_lock
);
204 switch (sysctl_ip_vs_secure_tcp
) {
206 if (old_secure_tcp
>= 2)
211 if (old_secure_tcp
< 2)
213 sysctl_ip_vs_secure_tcp
= 2;
215 if (old_secure_tcp
>= 2)
221 if (old_secure_tcp
< 2)
224 if (old_secure_tcp
>= 2)
226 sysctl_ip_vs_secure_tcp
= 1;
230 if (old_secure_tcp
< 2)
234 old_secure_tcp
= sysctl_ip_vs_secure_tcp
;
236 ip_vs_protocol_timeout_change(sysctl_ip_vs_secure_tcp
>1);
237 write_unlock(&__ip_vs_securetcp_lock
);
244 * Timer for checking the defense
246 #define DEFENSE_TIMER_PERIOD 1*HZ
247 static void defense_work_handler(struct work_struct
*work
);
248 static DECLARE_DELAYED_WORK(defense_work
, defense_work_handler
);
250 static void defense_work_handler(struct work_struct
*work
)
252 update_defense_level();
253 if (atomic_read(&ip_vs_dropentry
))
254 ip_vs_random_dropentry();
256 schedule_delayed_work(&defense_work
, DEFENSE_TIMER_PERIOD
);
260 ip_vs_use_count_inc(void)
262 return try_module_get(THIS_MODULE
);
266 ip_vs_use_count_dec(void)
268 module_put(THIS_MODULE
);
273 * Hash table: for virtual service lookups
275 #define IP_VS_SVC_TAB_BITS 8
276 #define IP_VS_SVC_TAB_SIZE (1 << IP_VS_SVC_TAB_BITS)
277 #define IP_VS_SVC_TAB_MASK (IP_VS_SVC_TAB_SIZE - 1)
279 /* the service table hashed by <protocol, addr, port> */
280 static struct list_head ip_vs_svc_table
[IP_VS_SVC_TAB_SIZE
];
281 /* the service table hashed by fwmark */
282 static struct list_head ip_vs_svc_fwm_table
[IP_VS_SVC_TAB_SIZE
];
285 * Hash table: for real service lookups
287 #define IP_VS_RTAB_BITS 4
288 #define IP_VS_RTAB_SIZE (1 << IP_VS_RTAB_BITS)
289 #define IP_VS_RTAB_MASK (IP_VS_RTAB_SIZE - 1)
291 static struct list_head ip_vs_rtable
[IP_VS_RTAB_SIZE
];
294 * Trash for destinations
296 static LIST_HEAD(ip_vs_dest_trash
);
299 * FTP & NULL virtual service counters
301 static atomic_t ip_vs_ftpsvc_counter
= ATOMIC_INIT(0);
302 static atomic_t ip_vs_nullsvc_counter
= ATOMIC_INIT(0);
306 * Returns hash value for virtual service
308 static __inline__
unsigned
309 ip_vs_svc_hashkey(int af
, unsigned proto
, const union nf_inet_addr
*addr
,
312 register unsigned porth
= ntohs(port
);
313 __be32 addr_fold
= addr
->ip
;
315 #ifdef CONFIG_IP_VS_IPV6
317 addr_fold
= addr
->ip6
[0]^addr
->ip6
[1]^
318 addr
->ip6
[2]^addr
->ip6
[3];
321 return (proto
^ntohl(addr_fold
)^(porth
>>IP_VS_SVC_TAB_BITS
)^porth
)
322 & IP_VS_SVC_TAB_MASK
;
326 * Returns hash value of fwmark for virtual service lookup
328 static __inline__
unsigned ip_vs_svc_fwm_hashkey(__u32 fwmark
)
330 return fwmark
& IP_VS_SVC_TAB_MASK
;
334 * Hashes a service in the ip_vs_svc_table by <proto,addr,port>
335 * or in the ip_vs_svc_fwm_table by fwmark.
336 * Should be called with locked tables.
338 static int ip_vs_svc_hash(struct ip_vs_service
*svc
)
342 if (svc
->flags
& IP_VS_SVC_F_HASHED
) {
343 IP_VS_ERR("ip_vs_svc_hash(): request for already hashed, "
344 "called from %p\n", __builtin_return_address(0));
348 if (svc
->fwmark
== 0) {
350 * Hash it by <protocol,addr,port> in ip_vs_svc_table
352 hash
= ip_vs_svc_hashkey(svc
->af
, svc
->protocol
, &svc
->addr
,
354 list_add(&svc
->s_list
, &ip_vs_svc_table
[hash
]);
357 * Hash it by fwmark in ip_vs_svc_fwm_table
359 hash
= ip_vs_svc_fwm_hashkey(svc
->fwmark
);
360 list_add(&svc
->f_list
, &ip_vs_svc_fwm_table
[hash
]);
363 svc
->flags
|= IP_VS_SVC_F_HASHED
;
364 /* increase its refcnt because it is referenced by the svc table */
365 atomic_inc(&svc
->refcnt
);
371 * Unhashes a service from ip_vs_svc_table/ip_vs_svc_fwm_table.
372 * Should be called with locked tables.
374 static int ip_vs_svc_unhash(struct ip_vs_service
*svc
)
376 if (!(svc
->flags
& IP_VS_SVC_F_HASHED
)) {
377 IP_VS_ERR("ip_vs_svc_unhash(): request for unhash flagged, "
378 "called from %p\n", __builtin_return_address(0));
382 if (svc
->fwmark
== 0) {
383 /* Remove it from the ip_vs_svc_table table */
384 list_del(&svc
->s_list
);
386 /* Remove it from the ip_vs_svc_fwm_table table */
387 list_del(&svc
->f_list
);
390 svc
->flags
&= ~IP_VS_SVC_F_HASHED
;
391 atomic_dec(&svc
->refcnt
);
397 * Get service by {proto,addr,port} in the service table.
399 static inline struct ip_vs_service
*
400 __ip_vs_service_get(int af
, __u16 protocol
, const union nf_inet_addr
*vaddr
,
404 struct ip_vs_service
*svc
;
406 /* Check for "full" addressed entries */
407 hash
= ip_vs_svc_hashkey(af
, protocol
, vaddr
, vport
);
409 list_for_each_entry(svc
, &ip_vs_svc_table
[hash
], s_list
){
411 && ip_vs_addr_equal(af
, &svc
->addr
, vaddr
)
412 && (svc
->port
== vport
)
413 && (svc
->protocol
== protocol
)) {
415 atomic_inc(&svc
->usecnt
);
425 * Get service by {fwmark} in the service table.
427 static inline struct ip_vs_service
*
428 __ip_vs_svc_fwm_get(int af
, __u32 fwmark
)
431 struct ip_vs_service
*svc
;
433 /* Check for fwmark addressed entries */
434 hash
= ip_vs_svc_fwm_hashkey(fwmark
);
436 list_for_each_entry(svc
, &ip_vs_svc_fwm_table
[hash
], f_list
) {
437 if (svc
->fwmark
== fwmark
&& svc
->af
== af
) {
439 atomic_inc(&svc
->usecnt
);
447 struct ip_vs_service
*
448 ip_vs_service_get(int af
, __u32 fwmark
, __u16 protocol
,
449 const union nf_inet_addr
*vaddr
, __be16 vport
)
451 struct ip_vs_service
*svc
;
453 read_lock(&__ip_vs_svc_lock
);
456 * Check the table hashed by fwmark first
458 if (fwmark
&& (svc
= __ip_vs_svc_fwm_get(af
, fwmark
)))
462 * Check the table hashed by <protocol,addr,port>
463 * for "full" addressed entries
465 svc
= __ip_vs_service_get(af
, protocol
, vaddr
, vport
);
468 && protocol
== IPPROTO_TCP
469 && atomic_read(&ip_vs_ftpsvc_counter
)
470 && (vport
== FTPDATA
|| ntohs(vport
) >= PROT_SOCK
)) {
472 * Check if ftp service entry exists, the packet
473 * might belong to FTP data connections.
475 svc
= __ip_vs_service_get(af
, protocol
, vaddr
, FTPPORT
);
479 && atomic_read(&ip_vs_nullsvc_counter
)) {
481 * Check if the catch-all port (port zero) exists
483 svc
= __ip_vs_service_get(af
, protocol
, vaddr
, 0);
487 read_unlock(&__ip_vs_svc_lock
);
489 IP_VS_DBG_BUF(9, "lookup service: fwm %u %s %s:%u %s\n",
490 fwmark
, ip_vs_proto_name(protocol
),
491 IP_VS_DBG_ADDR(af
, vaddr
), ntohs(vport
),
492 svc
? "hit" : "not hit");
499 __ip_vs_bind_svc(struct ip_vs_dest
*dest
, struct ip_vs_service
*svc
)
501 atomic_inc(&svc
->refcnt
);
506 __ip_vs_unbind_svc(struct ip_vs_dest
*dest
)
508 struct ip_vs_service
*svc
= dest
->svc
;
511 if (atomic_dec_and_test(&svc
->refcnt
))
517 * Returns hash value for real service
519 static inline unsigned ip_vs_rs_hashkey(int af
,
520 const union nf_inet_addr
*addr
,
523 register unsigned porth
= ntohs(port
);
524 __be32 addr_fold
= addr
->ip
;
526 #ifdef CONFIG_IP_VS_IPV6
528 addr_fold
= addr
->ip6
[0]^addr
->ip6
[1]^
529 addr
->ip6
[2]^addr
->ip6
[3];
532 return (ntohl(addr_fold
)^(porth
>>IP_VS_RTAB_BITS
)^porth
)
537 * Hashes ip_vs_dest in ip_vs_rtable by <proto,addr,port>.
538 * should be called with locked tables.
540 static int ip_vs_rs_hash(struct ip_vs_dest
*dest
)
544 if (!list_empty(&dest
->d_list
)) {
549 * Hash by proto,addr,port,
550 * which are the parameters of the real service.
552 hash
= ip_vs_rs_hashkey(dest
->af
, &dest
->addr
, dest
->port
);
554 list_add(&dest
->d_list
, &ip_vs_rtable
[hash
]);
560 * UNhashes ip_vs_dest from ip_vs_rtable.
561 * should be called with locked tables.
563 static int ip_vs_rs_unhash(struct ip_vs_dest
*dest
)
566 * Remove it from the ip_vs_rtable table.
568 if (!list_empty(&dest
->d_list
)) {
569 list_del(&dest
->d_list
);
570 INIT_LIST_HEAD(&dest
->d_list
);
577 * Lookup real service by <proto,addr,port> in the real service table.
580 ip_vs_lookup_real_service(int af
, __u16 protocol
,
581 const union nf_inet_addr
*daddr
,
585 struct ip_vs_dest
*dest
;
588 * Check for "full" addressed entries
589 * Return the first found entry
591 hash
= ip_vs_rs_hashkey(af
, daddr
, dport
);
593 read_lock(&__ip_vs_rs_lock
);
594 list_for_each_entry(dest
, &ip_vs_rtable
[hash
], d_list
) {
596 && ip_vs_addr_equal(af
, &dest
->addr
, daddr
)
597 && (dest
->port
== dport
)
598 && ((dest
->protocol
== protocol
) ||
601 read_unlock(&__ip_vs_rs_lock
);
605 read_unlock(&__ip_vs_rs_lock
);
611 * Lookup destination by {addr,port} in the given service
613 static struct ip_vs_dest
*
614 ip_vs_lookup_dest(struct ip_vs_service
*svc
, const union nf_inet_addr
*daddr
,
617 struct ip_vs_dest
*dest
;
620 * Find the destination for the given service
622 list_for_each_entry(dest
, &svc
->destinations
, n_list
) {
623 if ((dest
->af
== svc
->af
)
624 && ip_vs_addr_equal(svc
->af
, &dest
->addr
, daddr
)
625 && (dest
->port
== dport
)) {
635 * Find destination by {daddr,dport,vaddr,protocol}
636 * Cretaed to be used in ip_vs_process_message() in
637 * the backup synchronization daemon. It finds the
638 * destination to be bound to the received connection
641 * ip_vs_lookup_real_service() looked promissing, but
642 * seems not working as expected.
644 struct ip_vs_dest
*ip_vs_find_dest(int af
, const union nf_inet_addr
*daddr
,
646 const union nf_inet_addr
*vaddr
,
647 __be16 vport
, __u16 protocol
)
649 struct ip_vs_dest
*dest
;
650 struct ip_vs_service
*svc
;
652 svc
= ip_vs_service_get(af
, 0, protocol
, vaddr
, vport
);
655 dest
= ip_vs_lookup_dest(svc
, daddr
, dport
);
657 atomic_inc(&dest
->refcnt
);
658 ip_vs_service_put(svc
);
663 * Lookup dest by {svc,addr,port} in the destination trash.
664 * The destination trash is used to hold the destinations that are removed
665 * from the service table but are still referenced by some conn entries.
666 * The reason to add the destination trash is when the dest is temporary
667 * down (either by administrator or by monitor program), the dest can be
668 * picked back from the trash, the remaining connections to the dest can
669 * continue, and the counting information of the dest is also useful for
672 static struct ip_vs_dest
*
673 ip_vs_trash_get_dest(struct ip_vs_service
*svc
, const union nf_inet_addr
*daddr
,
676 struct ip_vs_dest
*dest
, *nxt
;
679 * Find the destination in trash
681 list_for_each_entry_safe(dest
, nxt
, &ip_vs_dest_trash
, n_list
) {
682 IP_VS_DBG_BUF(3, "Destination %u/%s:%u still in trash, "
685 IP_VS_DBG_ADDR(svc
->af
, &dest
->addr
),
687 atomic_read(&dest
->refcnt
));
688 if (dest
->af
== svc
->af
&&
689 ip_vs_addr_equal(svc
->af
, &dest
->addr
, daddr
) &&
690 dest
->port
== dport
&&
691 dest
->vfwmark
== svc
->fwmark
&&
692 dest
->protocol
== svc
->protocol
&&
694 (ip_vs_addr_equal(svc
->af
, &dest
->vaddr
, &svc
->addr
) &&
695 dest
->vport
== svc
->port
))) {
701 * Try to purge the destination from trash if not referenced
703 if (atomic_read(&dest
->refcnt
) == 1) {
704 IP_VS_DBG_BUF(3, "Removing destination %u/%s:%u "
707 IP_VS_DBG_ADDR(svc
->af
, &dest
->addr
),
709 list_del(&dest
->n_list
);
710 ip_vs_dst_reset(dest
);
711 __ip_vs_unbind_svc(dest
);
721 * Clean up all the destinations in the trash
722 * Called by the ip_vs_control_cleanup()
724 * When the ip_vs_control_clearup is activated by ipvs module exit,
725 * the service tables must have been flushed and all the connections
726 * are expired, and the refcnt of each destination in the trash must
727 * be 1, so we simply release them here.
729 static void ip_vs_trash_cleanup(void)
731 struct ip_vs_dest
*dest
, *nxt
;
733 list_for_each_entry_safe(dest
, nxt
, &ip_vs_dest_trash
, n_list
) {
734 list_del(&dest
->n_list
);
735 ip_vs_dst_reset(dest
);
736 __ip_vs_unbind_svc(dest
);
743 ip_vs_zero_stats(struct ip_vs_stats
*stats
)
745 spin_lock_bh(&stats
->lock
);
747 memset(&stats
->ustats
, 0, sizeof(stats
->ustats
));
748 ip_vs_zero_estimator(stats
);
750 spin_unlock_bh(&stats
->lock
);
754 * Update a destination in the given service
757 __ip_vs_update_dest(struct ip_vs_service
*svc
,
758 struct ip_vs_dest
*dest
, struct ip_vs_dest_user_kern
*udest
)
762 /* set the weight and the flags */
763 atomic_set(&dest
->weight
, udest
->weight
);
764 conn_flags
= udest
->conn_flags
| IP_VS_CONN_F_INACTIVE
;
766 /* check if local node and update the flags */
767 #ifdef CONFIG_IP_VS_IPV6
768 if (svc
->af
== AF_INET6
) {
769 if (__ip_vs_addr_is_local_v6(&udest
->addr
.in6
)) {
770 conn_flags
= (conn_flags
& ~IP_VS_CONN_F_FWD_MASK
)
771 | IP_VS_CONN_F_LOCALNODE
;
775 if (inet_addr_type(&init_net
, udest
->addr
.ip
) == RTN_LOCAL
) {
776 conn_flags
= (conn_flags
& ~IP_VS_CONN_F_FWD_MASK
)
777 | IP_VS_CONN_F_LOCALNODE
;
780 /* set the IP_VS_CONN_F_NOOUTPUT flag if not masquerading/NAT */
781 if ((conn_flags
& IP_VS_CONN_F_FWD_MASK
) != 0) {
782 conn_flags
|= IP_VS_CONN_F_NOOUTPUT
;
785 * Put the real service in ip_vs_rtable if not present.
786 * For now only for NAT!
788 write_lock_bh(&__ip_vs_rs_lock
);
790 write_unlock_bh(&__ip_vs_rs_lock
);
792 atomic_set(&dest
->conn_flags
, conn_flags
);
794 /* bind the service */
796 __ip_vs_bind_svc(dest
, svc
);
798 if (dest
->svc
!= svc
) {
799 __ip_vs_unbind_svc(dest
);
800 ip_vs_zero_stats(&dest
->stats
);
801 __ip_vs_bind_svc(dest
, svc
);
805 /* set the dest status flags */
806 dest
->flags
|= IP_VS_DEST_F_AVAILABLE
;
808 if (udest
->u_threshold
== 0 || udest
->u_threshold
> dest
->u_threshold
)
809 dest
->flags
&= ~IP_VS_DEST_F_OVERLOAD
;
810 dest
->u_threshold
= udest
->u_threshold
;
811 dest
->l_threshold
= udest
->l_threshold
;
816 * Create a destination for the given service
819 ip_vs_new_dest(struct ip_vs_service
*svc
, struct ip_vs_dest_user_kern
*udest
,
820 struct ip_vs_dest
**dest_p
)
822 struct ip_vs_dest
*dest
;
827 #ifdef CONFIG_IP_VS_IPV6
828 if (svc
->af
== AF_INET6
) {
829 atype
= ipv6_addr_type(&udest
->addr
.in6
);
830 if ((!(atype
& IPV6_ADDR_UNICAST
) ||
831 atype
& IPV6_ADDR_LINKLOCAL
) &&
832 !__ip_vs_addr_is_local_v6(&udest
->addr
.in6
))
837 atype
= inet_addr_type(&init_net
, udest
->addr
.ip
);
838 if (atype
!= RTN_LOCAL
&& atype
!= RTN_UNICAST
)
842 dest
= kzalloc(sizeof(struct ip_vs_dest
), GFP_ATOMIC
);
844 IP_VS_ERR("ip_vs_new_dest: kmalloc failed.\n");
849 dest
->protocol
= svc
->protocol
;
850 dest
->vaddr
= svc
->addr
;
851 dest
->vport
= svc
->port
;
852 dest
->vfwmark
= svc
->fwmark
;
853 ip_vs_addr_copy(svc
->af
, &dest
->addr
, &udest
->addr
);
854 dest
->port
= udest
->port
;
856 atomic_set(&dest
->activeconns
, 0);
857 atomic_set(&dest
->inactconns
, 0);
858 atomic_set(&dest
->persistconns
, 0);
859 atomic_set(&dest
->refcnt
, 0);
861 INIT_LIST_HEAD(&dest
->d_list
);
862 spin_lock_init(&dest
->dst_lock
);
863 spin_lock_init(&dest
->stats
.lock
);
864 __ip_vs_update_dest(svc
, dest
, udest
);
865 ip_vs_new_estimator(&dest
->stats
);
875 * Add a destination into an existing service
878 ip_vs_add_dest(struct ip_vs_service
*svc
, struct ip_vs_dest_user_kern
*udest
)
880 struct ip_vs_dest
*dest
;
881 union nf_inet_addr daddr
;
882 __be16 dport
= udest
->port
;
887 if (udest
->weight
< 0) {
888 IP_VS_ERR("ip_vs_add_dest(): server weight less than zero\n");
892 if (udest
->l_threshold
> udest
->u_threshold
) {
893 IP_VS_ERR("ip_vs_add_dest(): lower threshold is higher than "
894 "upper threshold\n");
898 ip_vs_addr_copy(svc
->af
, &daddr
, &udest
->addr
);
901 * Check if the dest already exists in the list
903 dest
= ip_vs_lookup_dest(svc
, &daddr
, dport
);
906 IP_VS_DBG(1, "ip_vs_add_dest(): dest already exists\n");
911 * Check if the dest already exists in the trash and
912 * is from the same service
914 dest
= ip_vs_trash_get_dest(svc
, &daddr
, dport
);
917 IP_VS_DBG_BUF(3, "Get destination %s:%u from trash, "
918 "dest->refcnt=%d, service %u/%s:%u\n",
919 IP_VS_DBG_ADDR(svc
->af
, &daddr
), ntohs(dport
),
920 atomic_read(&dest
->refcnt
),
922 IP_VS_DBG_ADDR(svc
->af
, &dest
->vaddr
),
925 __ip_vs_update_dest(svc
, dest
, udest
);
928 * Get the destination from the trash
930 list_del(&dest
->n_list
);
932 ip_vs_new_estimator(&dest
->stats
);
934 write_lock_bh(&__ip_vs_svc_lock
);
937 * Wait until all other svc users go away.
939 IP_VS_WAIT_WHILE(atomic_read(&svc
->usecnt
) > 1);
941 list_add(&dest
->n_list
, &svc
->destinations
);
944 /* call the update_service function of its scheduler */
945 if (svc
->scheduler
->update_service
)
946 svc
->scheduler
->update_service(svc
);
948 write_unlock_bh(&__ip_vs_svc_lock
);
953 * Allocate and initialize the dest structure
955 ret
= ip_vs_new_dest(svc
, udest
, &dest
);
961 * Add the dest entry into the list
963 atomic_inc(&dest
->refcnt
);
965 write_lock_bh(&__ip_vs_svc_lock
);
968 * Wait until all other svc users go away.
970 IP_VS_WAIT_WHILE(atomic_read(&svc
->usecnt
) > 1);
972 list_add(&dest
->n_list
, &svc
->destinations
);
975 /* call the update_service function of its scheduler */
976 if (svc
->scheduler
->update_service
)
977 svc
->scheduler
->update_service(svc
);
979 write_unlock_bh(&__ip_vs_svc_lock
);
988 * Edit a destination in the given service
991 ip_vs_edit_dest(struct ip_vs_service
*svc
, struct ip_vs_dest_user_kern
*udest
)
993 struct ip_vs_dest
*dest
;
994 union nf_inet_addr daddr
;
995 __be16 dport
= udest
->port
;
999 if (udest
->weight
< 0) {
1000 IP_VS_ERR("ip_vs_edit_dest(): server weight less than zero\n");
1004 if (udest
->l_threshold
> udest
->u_threshold
) {
1005 IP_VS_ERR("ip_vs_edit_dest(): lower threshold is higher than "
1006 "upper threshold\n");
1010 ip_vs_addr_copy(svc
->af
, &daddr
, &udest
->addr
);
1013 * Lookup the destination list
1015 dest
= ip_vs_lookup_dest(svc
, &daddr
, dport
);
1018 IP_VS_DBG(1, "ip_vs_edit_dest(): dest doesn't exist\n");
1022 __ip_vs_update_dest(svc
, dest
, udest
);
1024 write_lock_bh(&__ip_vs_svc_lock
);
1026 /* Wait until all other svc users go away */
1027 IP_VS_WAIT_WHILE(atomic_read(&svc
->usecnt
) > 1);
1029 /* call the update_service, because server weight may be changed */
1030 if (svc
->scheduler
->update_service
)
1031 svc
->scheduler
->update_service(svc
);
1033 write_unlock_bh(&__ip_vs_svc_lock
);
1042 * Delete a destination (must be already unlinked from the service)
1044 static void __ip_vs_del_dest(struct ip_vs_dest
*dest
)
1046 ip_vs_kill_estimator(&dest
->stats
);
1049 * Remove it from the d-linked list with the real services.
1051 write_lock_bh(&__ip_vs_rs_lock
);
1052 ip_vs_rs_unhash(dest
);
1053 write_unlock_bh(&__ip_vs_rs_lock
);
1056 * Decrease the refcnt of the dest, and free the dest
1057 * if nobody refers to it (refcnt=0). Otherwise, throw
1058 * the destination into the trash.
1060 if (atomic_dec_and_test(&dest
->refcnt
)) {
1061 ip_vs_dst_reset(dest
);
1062 /* simply decrease svc->refcnt here, let the caller check
1063 and release the service if nobody refers to it.
1064 Only user context can release destination and service,
1065 and only one user context can update virtual service at a
1066 time, so the operation here is OK */
1067 atomic_dec(&dest
->svc
->refcnt
);
1070 IP_VS_DBG_BUF(3, "Moving dest %s:%u into trash, "
1071 "dest->refcnt=%d\n",
1072 IP_VS_DBG_ADDR(dest
->af
, &dest
->addr
),
1074 atomic_read(&dest
->refcnt
));
1075 list_add(&dest
->n_list
, &ip_vs_dest_trash
);
1076 atomic_inc(&dest
->refcnt
);
1082 * Unlink a destination from the given service
1084 static void __ip_vs_unlink_dest(struct ip_vs_service
*svc
,
1085 struct ip_vs_dest
*dest
,
1088 dest
->flags
&= ~IP_VS_DEST_F_AVAILABLE
;
1091 * Remove it from the d-linked destination list.
1093 list_del(&dest
->n_list
);
1097 * Call the update_service function of its scheduler
1099 if (svcupd
&& svc
->scheduler
->update_service
)
1100 svc
->scheduler
->update_service(svc
);
1105 * Delete a destination server in the given service
1108 ip_vs_del_dest(struct ip_vs_service
*svc
, struct ip_vs_dest_user_kern
*udest
)
1110 struct ip_vs_dest
*dest
;
1111 __be16 dport
= udest
->port
;
1115 dest
= ip_vs_lookup_dest(svc
, &udest
->addr
, dport
);
1118 IP_VS_DBG(1, "ip_vs_del_dest(): destination not found!\n");
1122 write_lock_bh(&__ip_vs_svc_lock
);
1125 * Wait until all other svc users go away.
1127 IP_VS_WAIT_WHILE(atomic_read(&svc
->usecnt
) > 1);
1130 * Unlink dest from the service
1132 __ip_vs_unlink_dest(svc
, dest
, 1);
1134 write_unlock_bh(&__ip_vs_svc_lock
);
1137 * Delete the destination
1139 __ip_vs_del_dest(dest
);
1148 * Add a service into the service hash table
1151 ip_vs_add_service(struct ip_vs_service_user_kern
*u
,
1152 struct ip_vs_service
**svc_p
)
1155 struct ip_vs_scheduler
*sched
= NULL
;
1156 struct ip_vs_service
*svc
= NULL
;
1158 /* increase the module use count */
1159 ip_vs_use_count_inc();
1161 /* Lookup the scheduler by 'u->sched_name' */
1162 sched
= ip_vs_scheduler_get(u
->sched_name
);
1163 if (sched
== NULL
) {
1164 IP_VS_INFO("Scheduler module ip_vs_%s not found\n",
1170 #ifdef CONFIG_IP_VS_IPV6
1171 if (u
->af
== AF_INET6
) {
1172 if (!sched
->supports_ipv6
) {
1173 ret
= -EAFNOSUPPORT
;
1176 if ((u
->netmask
< 1) || (u
->netmask
> 128)) {
1183 svc
= kzalloc(sizeof(struct ip_vs_service
), GFP_ATOMIC
);
1185 IP_VS_DBG(1, "ip_vs_add_service: kmalloc failed.\n");
1190 /* I'm the first user of the service */
1191 atomic_set(&svc
->usecnt
, 1);
1192 atomic_set(&svc
->refcnt
, 0);
1195 svc
->protocol
= u
->protocol
;
1196 ip_vs_addr_copy(svc
->af
, &svc
->addr
, &u
->addr
);
1197 svc
->port
= u
->port
;
1198 svc
->fwmark
= u
->fwmark
;
1199 svc
->flags
= u
->flags
;
1200 svc
->timeout
= u
->timeout
* HZ
;
1201 svc
->netmask
= u
->netmask
;
1203 INIT_LIST_HEAD(&svc
->destinations
);
1204 rwlock_init(&svc
->sched_lock
);
1205 spin_lock_init(&svc
->stats
.lock
);
1207 /* Bind the scheduler */
1208 ret
= ip_vs_bind_scheduler(svc
, sched
);
1213 /* Update the virtual service counters */
1214 if (svc
->port
== FTPPORT
)
1215 atomic_inc(&ip_vs_ftpsvc_counter
);
1216 else if (svc
->port
== 0)
1217 atomic_inc(&ip_vs_nullsvc_counter
);
1219 ip_vs_new_estimator(&svc
->stats
);
1221 /* Count only IPv4 services for old get/setsockopt interface */
1222 if (svc
->af
== AF_INET
)
1223 ip_vs_num_services
++;
1225 /* Hash the service into the service table */
1226 write_lock_bh(&__ip_vs_svc_lock
);
1227 ip_vs_svc_hash(svc
);
1228 write_unlock_bh(&__ip_vs_svc_lock
);
1236 ip_vs_unbind_scheduler(svc
);
1239 ip_vs_app_inc_put(svc
->inc
);
1244 ip_vs_scheduler_put(sched
);
1247 /* decrease the module use count */
1248 ip_vs_use_count_dec();
1255 * Edit a service and bind it with a new scheduler
1258 ip_vs_edit_service(struct ip_vs_service
*svc
, struct ip_vs_service_user_kern
*u
)
1260 struct ip_vs_scheduler
*sched
, *old_sched
;
1264 * Lookup the scheduler, by 'u->sched_name'
1266 sched
= ip_vs_scheduler_get(u
->sched_name
);
1267 if (sched
== NULL
) {
1268 IP_VS_INFO("Scheduler module ip_vs_%s not found\n",
1274 #ifdef CONFIG_IP_VS_IPV6
1275 if (u
->af
== AF_INET6
) {
1276 if (!sched
->supports_ipv6
) {
1277 ret
= -EAFNOSUPPORT
;
1280 if ((u
->netmask
< 1) || (u
->netmask
> 128)) {
1287 write_lock_bh(&__ip_vs_svc_lock
);
1290 * Wait until all other svc users go away.
1292 IP_VS_WAIT_WHILE(atomic_read(&svc
->usecnt
) > 1);
1295 * Set the flags and timeout value
1297 svc
->flags
= u
->flags
| IP_VS_SVC_F_HASHED
;
1298 svc
->timeout
= u
->timeout
* HZ
;
1299 svc
->netmask
= u
->netmask
;
1301 old_sched
= svc
->scheduler
;
1302 if (sched
!= old_sched
) {
1304 * Unbind the old scheduler
1306 if ((ret
= ip_vs_unbind_scheduler(svc
))) {
1312 * Bind the new scheduler
1314 if ((ret
= ip_vs_bind_scheduler(svc
, sched
))) {
1316 * If ip_vs_bind_scheduler fails, restore the old
1318 * The main reason of failure is out of memory.
1320 * The question is if the old scheduler can be
1321 * restored all the time. TODO: if it cannot be
1322 * restored some time, we must delete the service,
1323 * otherwise the system may crash.
1325 ip_vs_bind_scheduler(svc
, old_sched
);
1332 write_unlock_bh(&__ip_vs_svc_lock
);
1335 ip_vs_scheduler_put(old_sched
);
1342 * Delete a service from the service list
1343 * - The service must be unlinked, unlocked and not referenced!
1344 * - We are called under _bh lock
1346 static void __ip_vs_del_service(struct ip_vs_service
*svc
)
1348 struct ip_vs_dest
*dest
, *nxt
;
1349 struct ip_vs_scheduler
*old_sched
;
1351 /* Count only IPv4 services for old get/setsockopt interface */
1352 if (svc
->af
== AF_INET
)
1353 ip_vs_num_services
--;
1355 ip_vs_kill_estimator(&svc
->stats
);
1357 /* Unbind scheduler */
1358 old_sched
= svc
->scheduler
;
1359 ip_vs_unbind_scheduler(svc
);
1361 ip_vs_scheduler_put(old_sched
);
1363 /* Unbind app inc */
1365 ip_vs_app_inc_put(svc
->inc
);
1370 * Unlink the whole destination list
1372 list_for_each_entry_safe(dest
, nxt
, &svc
->destinations
, n_list
) {
1373 __ip_vs_unlink_dest(svc
, dest
, 0);
1374 __ip_vs_del_dest(dest
);
1378 * Update the virtual service counters
1380 if (svc
->port
== FTPPORT
)
1381 atomic_dec(&ip_vs_ftpsvc_counter
);
1382 else if (svc
->port
== 0)
1383 atomic_dec(&ip_vs_nullsvc_counter
);
1386 * Free the service if nobody refers to it
1388 if (atomic_read(&svc
->refcnt
) == 0)
1391 /* decrease the module use count */
1392 ip_vs_use_count_dec();
1396 * Delete a service from the service list
1398 static int ip_vs_del_service(struct ip_vs_service
*svc
)
1404 * Unhash it from the service table
1406 write_lock_bh(&__ip_vs_svc_lock
);
1408 ip_vs_svc_unhash(svc
);
1411 * Wait until all the svc users go away.
1413 IP_VS_WAIT_WHILE(atomic_read(&svc
->usecnt
) > 1);
1415 __ip_vs_del_service(svc
);
1417 write_unlock_bh(&__ip_vs_svc_lock
);
1424 * Flush all the virtual services
1426 static int ip_vs_flush(void)
1429 struct ip_vs_service
*svc
, *nxt
;
1432 * Flush the service table hashed by <protocol,addr,port>
1434 for(idx
= 0; idx
< IP_VS_SVC_TAB_SIZE
; idx
++) {
1435 list_for_each_entry_safe(svc
, nxt
, &ip_vs_svc_table
[idx
], s_list
) {
1436 write_lock_bh(&__ip_vs_svc_lock
);
1437 ip_vs_svc_unhash(svc
);
1439 * Wait until all the svc users go away.
1441 IP_VS_WAIT_WHILE(atomic_read(&svc
->usecnt
) > 0);
1442 __ip_vs_del_service(svc
);
1443 write_unlock_bh(&__ip_vs_svc_lock
);
1448 * Flush the service table hashed by fwmark
1450 for(idx
= 0; idx
< IP_VS_SVC_TAB_SIZE
; idx
++) {
1451 list_for_each_entry_safe(svc
, nxt
,
1452 &ip_vs_svc_fwm_table
[idx
], f_list
) {
1453 write_lock_bh(&__ip_vs_svc_lock
);
1454 ip_vs_svc_unhash(svc
);
1456 * Wait until all the svc users go away.
1458 IP_VS_WAIT_WHILE(atomic_read(&svc
->usecnt
) > 0);
1459 __ip_vs_del_service(svc
);
1460 write_unlock_bh(&__ip_vs_svc_lock
);
1469 * Zero counters in a service or all services
1471 static int ip_vs_zero_service(struct ip_vs_service
*svc
)
1473 struct ip_vs_dest
*dest
;
1475 write_lock_bh(&__ip_vs_svc_lock
);
1476 list_for_each_entry(dest
, &svc
->destinations
, n_list
) {
1477 ip_vs_zero_stats(&dest
->stats
);
1479 ip_vs_zero_stats(&svc
->stats
);
1480 write_unlock_bh(&__ip_vs_svc_lock
);
1484 static int ip_vs_zero_all(void)
1487 struct ip_vs_service
*svc
;
1489 for(idx
= 0; idx
< IP_VS_SVC_TAB_SIZE
; idx
++) {
1490 list_for_each_entry(svc
, &ip_vs_svc_table
[idx
], s_list
) {
1491 ip_vs_zero_service(svc
);
1495 for(idx
= 0; idx
< IP_VS_SVC_TAB_SIZE
; idx
++) {
1496 list_for_each_entry(svc
, &ip_vs_svc_fwm_table
[idx
], f_list
) {
1497 ip_vs_zero_service(svc
);
1501 ip_vs_zero_stats(&ip_vs_stats
);
1507 proc_do_defense_mode(ctl_table
*table
, int write
, struct file
* filp
,
1508 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
1510 int *valp
= table
->data
;
1514 rc
= proc_dointvec(table
, write
, filp
, buffer
, lenp
, ppos
);
1515 if (write
&& (*valp
!= val
)) {
1516 if ((*valp
< 0) || (*valp
> 3)) {
1517 /* Restore the correct value */
1520 update_defense_level();
1528 proc_do_sync_threshold(ctl_table
*table
, int write
, struct file
*filp
,
1529 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
1531 int *valp
= table
->data
;
1535 /* backup the value first */
1536 memcpy(val
, valp
, sizeof(val
));
1538 rc
= proc_dointvec(table
, write
, filp
, buffer
, lenp
, ppos
);
1539 if (write
&& (valp
[0] < 0 || valp
[1] < 0 || valp
[0] >= valp
[1])) {
1540 /* Restore the correct value */
1541 memcpy(valp
, val
, sizeof(val
));
1548 * IPVS sysctl table (under the /proc/sys/net/ipv4/vs/)
1551 static struct ctl_table vs_vars
[] = {
1553 .procname
= "amemthresh",
1554 .data
= &sysctl_ip_vs_amemthresh
,
1555 .maxlen
= sizeof(int),
1557 .proc_handler
= &proc_dointvec
,
1559 #ifdef CONFIG_IP_VS_DEBUG
1561 .procname
= "debug_level",
1562 .data
= &sysctl_ip_vs_debug_level
,
1563 .maxlen
= sizeof(int),
1565 .proc_handler
= &proc_dointvec
,
1569 .procname
= "am_droprate",
1570 .data
= &sysctl_ip_vs_am_droprate
,
1571 .maxlen
= sizeof(int),
1573 .proc_handler
= &proc_dointvec
,
1576 .procname
= "drop_entry",
1577 .data
= &sysctl_ip_vs_drop_entry
,
1578 .maxlen
= sizeof(int),
1580 .proc_handler
= &proc_do_defense_mode
,
1583 .procname
= "drop_packet",
1584 .data
= &sysctl_ip_vs_drop_packet
,
1585 .maxlen
= sizeof(int),
1587 .proc_handler
= &proc_do_defense_mode
,
1590 .procname
= "secure_tcp",
1591 .data
= &sysctl_ip_vs_secure_tcp
,
1592 .maxlen
= sizeof(int),
1594 .proc_handler
= &proc_do_defense_mode
,
1598 .procname
= "timeout_established",
1599 .data
= &vs_timeout_table_dos
.timeout
[IP_VS_S_ESTABLISHED
],
1600 .maxlen
= sizeof(int),
1602 .proc_handler
= &proc_dointvec_jiffies
,
1605 .procname
= "timeout_synsent",
1606 .data
= &vs_timeout_table_dos
.timeout
[IP_VS_S_SYN_SENT
],
1607 .maxlen
= sizeof(int),
1609 .proc_handler
= &proc_dointvec_jiffies
,
1612 .procname
= "timeout_synrecv",
1613 .data
= &vs_timeout_table_dos
.timeout
[IP_VS_S_SYN_RECV
],
1614 .maxlen
= sizeof(int),
1616 .proc_handler
= &proc_dointvec_jiffies
,
1619 .procname
= "timeout_finwait",
1620 .data
= &vs_timeout_table_dos
.timeout
[IP_VS_S_FIN_WAIT
],
1621 .maxlen
= sizeof(int),
1623 .proc_handler
= &proc_dointvec_jiffies
,
1626 .procname
= "timeout_timewait",
1627 .data
= &vs_timeout_table_dos
.timeout
[IP_VS_S_TIME_WAIT
],
1628 .maxlen
= sizeof(int),
1630 .proc_handler
= &proc_dointvec_jiffies
,
1633 .procname
= "timeout_close",
1634 .data
= &vs_timeout_table_dos
.timeout
[IP_VS_S_CLOSE
],
1635 .maxlen
= sizeof(int),
1637 .proc_handler
= &proc_dointvec_jiffies
,
1640 .procname
= "timeout_closewait",
1641 .data
= &vs_timeout_table_dos
.timeout
[IP_VS_S_CLOSE_WAIT
],
1642 .maxlen
= sizeof(int),
1644 .proc_handler
= &proc_dointvec_jiffies
,
1647 .procname
= "timeout_lastack",
1648 .data
= &vs_timeout_table_dos
.timeout
[IP_VS_S_LAST_ACK
],
1649 .maxlen
= sizeof(int),
1651 .proc_handler
= &proc_dointvec_jiffies
,
1654 .procname
= "timeout_listen",
1655 .data
= &vs_timeout_table_dos
.timeout
[IP_VS_S_LISTEN
],
1656 .maxlen
= sizeof(int),
1658 .proc_handler
= &proc_dointvec_jiffies
,
1661 .procname
= "timeout_synack",
1662 .data
= &vs_timeout_table_dos
.timeout
[IP_VS_S_SYNACK
],
1663 .maxlen
= sizeof(int),
1665 .proc_handler
= &proc_dointvec_jiffies
,
1668 .procname
= "timeout_udp",
1669 .data
= &vs_timeout_table_dos
.timeout
[IP_VS_S_UDP
],
1670 .maxlen
= sizeof(int),
1672 .proc_handler
= &proc_dointvec_jiffies
,
1675 .procname
= "timeout_icmp",
1676 .data
= &vs_timeout_table_dos
.timeout
[IP_VS_S_ICMP
],
1677 .maxlen
= sizeof(int),
1679 .proc_handler
= &proc_dointvec_jiffies
,
1683 .procname
= "cache_bypass",
1684 .data
= &sysctl_ip_vs_cache_bypass
,
1685 .maxlen
= sizeof(int),
1687 .proc_handler
= &proc_dointvec
,
1690 .procname
= "expire_nodest_conn",
1691 .data
= &sysctl_ip_vs_expire_nodest_conn
,
1692 .maxlen
= sizeof(int),
1694 .proc_handler
= &proc_dointvec
,
1697 .procname
= "expire_quiescent_template",
1698 .data
= &sysctl_ip_vs_expire_quiescent_template
,
1699 .maxlen
= sizeof(int),
1701 .proc_handler
= &proc_dointvec
,
1704 .procname
= "sync_threshold",
1705 .data
= &sysctl_ip_vs_sync_threshold
,
1706 .maxlen
= sizeof(sysctl_ip_vs_sync_threshold
),
1708 .proc_handler
= &proc_do_sync_threshold
,
1711 .procname
= "nat_icmp_send",
1712 .data
= &sysctl_ip_vs_nat_icmp_send
,
1713 .maxlen
= sizeof(int),
1715 .proc_handler
= &proc_dointvec
,
1720 const struct ctl_path net_vs_ctl_path
[] = {
1721 { .procname
= "net", .ctl_name
= CTL_NET
, },
1722 { .procname
= "ipv4", .ctl_name
= NET_IPV4
, },
1723 { .procname
= "vs", },
1726 EXPORT_SYMBOL_GPL(net_vs_ctl_path
);
1728 static struct ctl_table_header
* sysctl_header
;
1730 #ifdef CONFIG_PROC_FS
1733 struct list_head
*table
;
1738 * Write the contents of the VS rule table to a PROCfs file.
1739 * (It is kept just for backward compatibility)
1741 static inline const char *ip_vs_fwd_name(unsigned flags
)
1743 switch (flags
& IP_VS_CONN_F_FWD_MASK
) {
1744 case IP_VS_CONN_F_LOCALNODE
:
1746 case IP_VS_CONN_F_TUNNEL
:
1748 case IP_VS_CONN_F_DROUTE
:
1756 /* Get the Nth entry in the two lists */
1757 static struct ip_vs_service
*ip_vs_info_array(struct seq_file
*seq
, loff_t pos
)
1759 struct ip_vs_iter
*iter
= seq
->private;
1761 struct ip_vs_service
*svc
;
1763 /* look in hash by protocol */
1764 for (idx
= 0; idx
< IP_VS_SVC_TAB_SIZE
; idx
++) {
1765 list_for_each_entry(svc
, &ip_vs_svc_table
[idx
], s_list
) {
1767 iter
->table
= ip_vs_svc_table
;
1774 /* keep looking in fwmark */
1775 for (idx
= 0; idx
< IP_VS_SVC_TAB_SIZE
; idx
++) {
1776 list_for_each_entry(svc
, &ip_vs_svc_fwm_table
[idx
], f_list
) {
1778 iter
->table
= ip_vs_svc_fwm_table
;
1788 static void *ip_vs_info_seq_start(struct seq_file
*seq
, loff_t
*pos
)
1791 read_lock_bh(&__ip_vs_svc_lock
);
1792 return *pos
? ip_vs_info_array(seq
, *pos
- 1) : SEQ_START_TOKEN
;
1796 static void *ip_vs_info_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
1798 struct list_head
*e
;
1799 struct ip_vs_iter
*iter
;
1800 struct ip_vs_service
*svc
;
1803 if (v
== SEQ_START_TOKEN
)
1804 return ip_vs_info_array(seq
,0);
1807 iter
= seq
->private;
1809 if (iter
->table
== ip_vs_svc_table
) {
1810 /* next service in table hashed by protocol */
1811 if ((e
= svc
->s_list
.next
) != &ip_vs_svc_table
[iter
->bucket
])
1812 return list_entry(e
, struct ip_vs_service
, s_list
);
1815 while (++iter
->bucket
< IP_VS_SVC_TAB_SIZE
) {
1816 list_for_each_entry(svc
,&ip_vs_svc_table
[iter
->bucket
],
1822 iter
->table
= ip_vs_svc_fwm_table
;
1827 /* next service in hashed by fwmark */
1828 if ((e
= svc
->f_list
.next
) != &ip_vs_svc_fwm_table
[iter
->bucket
])
1829 return list_entry(e
, struct ip_vs_service
, f_list
);
1832 while (++iter
->bucket
< IP_VS_SVC_TAB_SIZE
) {
1833 list_for_each_entry(svc
, &ip_vs_svc_fwm_table
[iter
->bucket
],
1841 static void ip_vs_info_seq_stop(struct seq_file
*seq
, void *v
)
1843 read_unlock_bh(&__ip_vs_svc_lock
);
1847 static int ip_vs_info_seq_show(struct seq_file
*seq
, void *v
)
1849 if (v
== SEQ_START_TOKEN
) {
1851 "IP Virtual Server version %d.%d.%d (size=%d)\n",
1852 NVERSION(IP_VS_VERSION_CODE
), IP_VS_CONN_TAB_SIZE
);
1854 "Prot LocalAddress:Port Scheduler Flags\n");
1856 " -> RemoteAddress:Port Forward Weight ActiveConn InActConn\n");
1858 const struct ip_vs_service
*svc
= v
;
1859 const struct ip_vs_iter
*iter
= seq
->private;
1860 const struct ip_vs_dest
*dest
;
1862 if (iter
->table
== ip_vs_svc_table
) {
1863 #ifdef CONFIG_IP_VS_IPV6
1864 if (svc
->af
== AF_INET6
)
1865 seq_printf(seq
, "%s [" NIP6_FMT
"]:%04X %s ",
1866 ip_vs_proto_name(svc
->protocol
),
1867 NIP6(svc
->addr
.in6
),
1869 svc
->scheduler
->name
);
1872 seq_printf(seq
, "%s %08X:%04X %s ",
1873 ip_vs_proto_name(svc
->protocol
),
1874 ntohl(svc
->addr
.ip
),
1876 svc
->scheduler
->name
);
1878 seq_printf(seq
, "FWM %08X %s ",
1879 svc
->fwmark
, svc
->scheduler
->name
);
1882 if (svc
->flags
& IP_VS_SVC_F_PERSISTENT
)
1883 seq_printf(seq
, "persistent %d %08X\n",
1885 ntohl(svc
->netmask
));
1887 seq_putc(seq
, '\n');
1889 list_for_each_entry(dest
, &svc
->destinations
, n_list
) {
1890 #ifdef CONFIG_IP_VS_IPV6
1891 if (dest
->af
== AF_INET6
)
1893 " -> [" NIP6_FMT
"]:%04X"
1894 " %-7s %-6d %-10d %-10d\n",
1895 NIP6(dest
->addr
.in6
),
1897 ip_vs_fwd_name(atomic_read(&dest
->conn_flags
)),
1898 atomic_read(&dest
->weight
),
1899 atomic_read(&dest
->activeconns
),
1900 atomic_read(&dest
->inactconns
));
1905 "%-7s %-6d %-10d %-10d\n",
1906 ntohl(dest
->addr
.ip
),
1908 ip_vs_fwd_name(atomic_read(&dest
->conn_flags
)),
1909 atomic_read(&dest
->weight
),
1910 atomic_read(&dest
->activeconns
),
1911 atomic_read(&dest
->inactconns
));
1918 static const struct seq_operations ip_vs_info_seq_ops
= {
1919 .start
= ip_vs_info_seq_start
,
1920 .next
= ip_vs_info_seq_next
,
1921 .stop
= ip_vs_info_seq_stop
,
1922 .show
= ip_vs_info_seq_show
,
1925 static int ip_vs_info_open(struct inode
*inode
, struct file
*file
)
1927 return seq_open_private(file
, &ip_vs_info_seq_ops
,
1928 sizeof(struct ip_vs_iter
));
1931 static const struct file_operations ip_vs_info_fops
= {
1932 .owner
= THIS_MODULE
,
1933 .open
= ip_vs_info_open
,
1935 .llseek
= seq_lseek
,
1936 .release
= seq_release_private
,
1941 struct ip_vs_stats ip_vs_stats
= {
1942 .lock
= __SPIN_LOCK_UNLOCKED(ip_vs_stats
.lock
),
1945 #ifdef CONFIG_PROC_FS
1946 static int ip_vs_stats_show(struct seq_file
*seq
, void *v
)
1949 /* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
1951 " Total Incoming Outgoing Incoming Outgoing\n");
1953 " Conns Packets Packets Bytes Bytes\n");
1955 spin_lock_bh(&ip_vs_stats
.lock
);
1956 seq_printf(seq
, "%8X %8X %8X %16LX %16LX\n\n", ip_vs_stats
.ustats
.conns
,
1957 ip_vs_stats
.ustats
.inpkts
, ip_vs_stats
.ustats
.outpkts
,
1958 (unsigned long long) ip_vs_stats
.ustats
.inbytes
,
1959 (unsigned long long) ip_vs_stats
.ustats
.outbytes
);
1961 /* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
1963 " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
1964 seq_printf(seq
,"%8X %8X %8X %16X %16X\n",
1965 ip_vs_stats
.ustats
.cps
,
1966 ip_vs_stats
.ustats
.inpps
,
1967 ip_vs_stats
.ustats
.outpps
,
1968 ip_vs_stats
.ustats
.inbps
,
1969 ip_vs_stats
.ustats
.outbps
);
1970 spin_unlock_bh(&ip_vs_stats
.lock
);
1975 static int ip_vs_stats_seq_open(struct inode
*inode
, struct file
*file
)
1977 return single_open(file
, ip_vs_stats_show
, NULL
);
1980 static const struct file_operations ip_vs_stats_fops
= {
1981 .owner
= THIS_MODULE
,
1982 .open
= ip_vs_stats_seq_open
,
1984 .llseek
= seq_lseek
,
1985 .release
= single_release
,
1991 * Set timeout values for tcp tcpfin udp in the timeout_table.
1993 static int ip_vs_set_timeout(struct ip_vs_timeout_user
*u
)
1995 IP_VS_DBG(2, "Setting timeout tcp:%d tcpfin:%d udp:%d\n",
2000 #ifdef CONFIG_IP_VS_PROTO_TCP
2001 if (u
->tcp_timeout
) {
2002 ip_vs_protocol_tcp
.timeout_table
[IP_VS_TCP_S_ESTABLISHED
]
2003 = u
->tcp_timeout
* HZ
;
2006 if (u
->tcp_fin_timeout
) {
2007 ip_vs_protocol_tcp
.timeout_table
[IP_VS_TCP_S_FIN_WAIT
]
2008 = u
->tcp_fin_timeout
* HZ
;
2012 #ifdef CONFIG_IP_VS_PROTO_UDP
2013 if (u
->udp_timeout
) {
2014 ip_vs_protocol_udp
.timeout_table
[IP_VS_UDP_S_NORMAL
]
2015 = u
->udp_timeout
* HZ
;
2022 #define SET_CMDID(cmd) (cmd - IP_VS_BASE_CTL)
2023 #define SERVICE_ARG_LEN (sizeof(struct ip_vs_service_user))
2024 #define SVCDEST_ARG_LEN (sizeof(struct ip_vs_service_user) + \
2025 sizeof(struct ip_vs_dest_user))
2026 #define TIMEOUT_ARG_LEN (sizeof(struct ip_vs_timeout_user))
2027 #define DAEMON_ARG_LEN (sizeof(struct ip_vs_daemon_user))
2028 #define MAX_ARG_LEN SVCDEST_ARG_LEN
2030 static const unsigned char set_arglen
[SET_CMDID(IP_VS_SO_SET_MAX
)+1] = {
2031 [SET_CMDID(IP_VS_SO_SET_ADD
)] = SERVICE_ARG_LEN
,
2032 [SET_CMDID(IP_VS_SO_SET_EDIT
)] = SERVICE_ARG_LEN
,
2033 [SET_CMDID(IP_VS_SO_SET_DEL
)] = SERVICE_ARG_LEN
,
2034 [SET_CMDID(IP_VS_SO_SET_FLUSH
)] = 0,
2035 [SET_CMDID(IP_VS_SO_SET_ADDDEST
)] = SVCDEST_ARG_LEN
,
2036 [SET_CMDID(IP_VS_SO_SET_DELDEST
)] = SVCDEST_ARG_LEN
,
2037 [SET_CMDID(IP_VS_SO_SET_EDITDEST
)] = SVCDEST_ARG_LEN
,
2038 [SET_CMDID(IP_VS_SO_SET_TIMEOUT
)] = TIMEOUT_ARG_LEN
,
2039 [SET_CMDID(IP_VS_SO_SET_STARTDAEMON
)] = DAEMON_ARG_LEN
,
2040 [SET_CMDID(IP_VS_SO_SET_STOPDAEMON
)] = DAEMON_ARG_LEN
,
2041 [SET_CMDID(IP_VS_SO_SET_ZERO
)] = SERVICE_ARG_LEN
,
2044 static void ip_vs_copy_usvc_compat(struct ip_vs_service_user_kern
*usvc
,
2045 struct ip_vs_service_user
*usvc_compat
)
2048 usvc
->protocol
= usvc_compat
->protocol
;
2049 usvc
->addr
.ip
= usvc_compat
->addr
;
2050 usvc
->port
= usvc_compat
->port
;
2051 usvc
->fwmark
= usvc_compat
->fwmark
;
2053 /* Deep copy of sched_name is not needed here */
2054 usvc
->sched_name
= usvc_compat
->sched_name
;
2056 usvc
->flags
= usvc_compat
->flags
;
2057 usvc
->timeout
= usvc_compat
->timeout
;
2058 usvc
->netmask
= usvc_compat
->netmask
;
2061 static void ip_vs_copy_udest_compat(struct ip_vs_dest_user_kern
*udest
,
2062 struct ip_vs_dest_user
*udest_compat
)
2064 udest
->addr
.ip
= udest_compat
->addr
;
2065 udest
->port
= udest_compat
->port
;
2066 udest
->conn_flags
= udest_compat
->conn_flags
;
2067 udest
->weight
= udest_compat
->weight
;
2068 udest
->u_threshold
= udest_compat
->u_threshold
;
2069 udest
->l_threshold
= udest_compat
->l_threshold
;
2073 do_ip_vs_set_ctl(struct sock
*sk
, int cmd
, void __user
*user
, unsigned int len
)
2076 unsigned char arg
[MAX_ARG_LEN
];
2077 struct ip_vs_service_user
*usvc_compat
;
2078 struct ip_vs_service_user_kern usvc
;
2079 struct ip_vs_service
*svc
;
2080 struct ip_vs_dest_user
*udest_compat
;
2081 struct ip_vs_dest_user_kern udest
;
2083 if (!capable(CAP_NET_ADMIN
))
2086 if (len
!= set_arglen
[SET_CMDID(cmd
)]) {
2087 IP_VS_ERR("set_ctl: len %u != %u\n",
2088 len
, set_arglen
[SET_CMDID(cmd
)]);
2092 if (copy_from_user(arg
, user
, len
) != 0)
2095 /* increase the module use count */
2096 ip_vs_use_count_inc();
2098 if (mutex_lock_interruptible(&__ip_vs_mutex
)) {
2103 if (cmd
== IP_VS_SO_SET_FLUSH
) {
2104 /* Flush the virtual service */
2105 ret
= ip_vs_flush();
2107 } else if (cmd
== IP_VS_SO_SET_TIMEOUT
) {
2108 /* Set timeout values for (tcp tcpfin udp) */
2109 ret
= ip_vs_set_timeout((struct ip_vs_timeout_user
*)arg
);
2111 } else if (cmd
== IP_VS_SO_SET_STARTDAEMON
) {
2112 struct ip_vs_daemon_user
*dm
= (struct ip_vs_daemon_user
*)arg
;
2113 ret
= start_sync_thread(dm
->state
, dm
->mcast_ifn
, dm
->syncid
);
2115 } else if (cmd
== IP_VS_SO_SET_STOPDAEMON
) {
2116 struct ip_vs_daemon_user
*dm
= (struct ip_vs_daemon_user
*)arg
;
2117 ret
= stop_sync_thread(dm
->state
);
2121 usvc_compat
= (struct ip_vs_service_user
*)arg
;
2122 udest_compat
= (struct ip_vs_dest_user
*)(usvc_compat
+ 1);
2124 /* We only use the new structs internally, so copy userspace compat
2125 * structs to extended internal versions */
2126 ip_vs_copy_usvc_compat(&usvc
, usvc_compat
);
2127 ip_vs_copy_udest_compat(&udest
, udest_compat
);
2129 if (cmd
== IP_VS_SO_SET_ZERO
) {
2130 /* if no service address is set, zero counters in all */
2131 if (!usvc
.fwmark
&& !usvc
.addr
.ip
&& !usvc
.port
) {
2132 ret
= ip_vs_zero_all();
2137 /* Check for valid protocol: TCP or UDP, even for fwmark!=0 */
2138 if (usvc
.protocol
!= IPPROTO_TCP
&& usvc
.protocol
!= IPPROTO_UDP
) {
2139 IP_VS_ERR("set_ctl: invalid protocol: %d %d.%d.%d.%d:%d %s\n",
2140 usvc
.protocol
, NIPQUAD(usvc
.addr
.ip
),
2141 ntohs(usvc
.port
), usvc
.sched_name
);
2146 /* Lookup the exact service by <protocol, addr, port> or fwmark */
2147 if (usvc
.fwmark
== 0)
2148 svc
= __ip_vs_service_get(usvc
.af
, usvc
.protocol
,
2149 &usvc
.addr
, usvc
.port
);
2151 svc
= __ip_vs_svc_fwm_get(usvc
.af
, usvc
.fwmark
);
2153 if (cmd
!= IP_VS_SO_SET_ADD
2154 && (svc
== NULL
|| svc
->protocol
!= usvc
.protocol
)) {
2160 case IP_VS_SO_SET_ADD
:
2164 ret
= ip_vs_add_service(&usvc
, &svc
);
2166 case IP_VS_SO_SET_EDIT
:
2167 ret
= ip_vs_edit_service(svc
, &usvc
);
2169 case IP_VS_SO_SET_DEL
:
2170 ret
= ip_vs_del_service(svc
);
2174 case IP_VS_SO_SET_ZERO
:
2175 ret
= ip_vs_zero_service(svc
);
2177 case IP_VS_SO_SET_ADDDEST
:
2178 ret
= ip_vs_add_dest(svc
, &udest
);
2180 case IP_VS_SO_SET_EDITDEST
:
2181 ret
= ip_vs_edit_dest(svc
, &udest
);
2183 case IP_VS_SO_SET_DELDEST
:
2184 ret
= ip_vs_del_dest(svc
, &udest
);
2191 ip_vs_service_put(svc
);
2194 mutex_unlock(&__ip_vs_mutex
);
2196 /* decrease the module use count */
2197 ip_vs_use_count_dec();
2204 ip_vs_copy_stats(struct ip_vs_stats_user
*dst
, struct ip_vs_stats
*src
)
2206 spin_lock_bh(&src
->lock
);
2207 memcpy(dst
, &src
->ustats
, sizeof(*dst
));
2208 spin_unlock_bh(&src
->lock
);
2212 ip_vs_copy_service(struct ip_vs_service_entry
*dst
, struct ip_vs_service
*src
)
2214 dst
->protocol
= src
->protocol
;
2215 dst
->addr
= src
->addr
.ip
;
2216 dst
->port
= src
->port
;
2217 dst
->fwmark
= src
->fwmark
;
2218 strlcpy(dst
->sched_name
, src
->scheduler
->name
, sizeof(dst
->sched_name
));
2219 dst
->flags
= src
->flags
;
2220 dst
->timeout
= src
->timeout
/ HZ
;
2221 dst
->netmask
= src
->netmask
;
2222 dst
->num_dests
= src
->num_dests
;
2223 ip_vs_copy_stats(&dst
->stats
, &src
->stats
);
2227 __ip_vs_get_service_entries(const struct ip_vs_get_services
*get
,
2228 struct ip_vs_get_services __user
*uptr
)
2231 struct ip_vs_service
*svc
;
2232 struct ip_vs_service_entry entry
;
2235 for (idx
= 0; idx
< IP_VS_SVC_TAB_SIZE
; idx
++) {
2236 list_for_each_entry(svc
, &ip_vs_svc_table
[idx
], s_list
) {
2237 /* Only expose IPv4 entries to old interface */
2238 if (svc
->af
!= AF_INET
)
2241 if (count
>= get
->num_services
)
2243 memset(&entry
, 0, sizeof(entry
));
2244 ip_vs_copy_service(&entry
, svc
);
2245 if (copy_to_user(&uptr
->entrytable
[count
],
2246 &entry
, sizeof(entry
))) {
2254 for (idx
= 0; idx
< IP_VS_SVC_TAB_SIZE
; idx
++) {
2255 list_for_each_entry(svc
, &ip_vs_svc_fwm_table
[idx
], f_list
) {
2256 /* Only expose IPv4 entries to old interface */
2257 if (svc
->af
!= AF_INET
)
2260 if (count
>= get
->num_services
)
2262 memset(&entry
, 0, sizeof(entry
));
2263 ip_vs_copy_service(&entry
, svc
);
2264 if (copy_to_user(&uptr
->entrytable
[count
],
2265 &entry
, sizeof(entry
))) {
2277 __ip_vs_get_dest_entries(const struct ip_vs_get_dests
*get
,
2278 struct ip_vs_get_dests __user
*uptr
)
2280 struct ip_vs_service
*svc
;
2281 union nf_inet_addr addr
= { .ip
= get
->addr
};
2285 svc
= __ip_vs_svc_fwm_get(AF_INET
, get
->fwmark
);
2287 svc
= __ip_vs_service_get(AF_INET
, get
->protocol
, &addr
,
2292 struct ip_vs_dest
*dest
;
2293 struct ip_vs_dest_entry entry
;
2295 list_for_each_entry(dest
, &svc
->destinations
, n_list
) {
2296 if (count
>= get
->num_dests
)
2299 entry
.addr
= dest
->addr
.ip
;
2300 entry
.port
= dest
->port
;
2301 entry
.conn_flags
= atomic_read(&dest
->conn_flags
);
2302 entry
.weight
= atomic_read(&dest
->weight
);
2303 entry
.u_threshold
= dest
->u_threshold
;
2304 entry
.l_threshold
= dest
->l_threshold
;
2305 entry
.activeconns
= atomic_read(&dest
->activeconns
);
2306 entry
.inactconns
= atomic_read(&dest
->inactconns
);
2307 entry
.persistconns
= atomic_read(&dest
->persistconns
);
2308 ip_vs_copy_stats(&entry
.stats
, &dest
->stats
);
2309 if (copy_to_user(&uptr
->entrytable
[count
],
2310 &entry
, sizeof(entry
))) {
2316 ip_vs_service_put(svc
);
2323 __ip_vs_get_timeouts(struct ip_vs_timeout_user
*u
)
2325 #ifdef CONFIG_IP_VS_PROTO_TCP
2327 ip_vs_protocol_tcp
.timeout_table
[IP_VS_TCP_S_ESTABLISHED
] / HZ
;
2328 u
->tcp_fin_timeout
=
2329 ip_vs_protocol_tcp
.timeout_table
[IP_VS_TCP_S_FIN_WAIT
] / HZ
;
2331 #ifdef CONFIG_IP_VS_PROTO_UDP
2333 ip_vs_protocol_udp
.timeout_table
[IP_VS_UDP_S_NORMAL
] / HZ
;
2338 #define GET_CMDID(cmd) (cmd - IP_VS_BASE_CTL)
2339 #define GET_INFO_ARG_LEN (sizeof(struct ip_vs_getinfo))
2340 #define GET_SERVICES_ARG_LEN (sizeof(struct ip_vs_get_services))
2341 #define GET_SERVICE_ARG_LEN (sizeof(struct ip_vs_service_entry))
2342 #define GET_DESTS_ARG_LEN (sizeof(struct ip_vs_get_dests))
2343 #define GET_TIMEOUT_ARG_LEN (sizeof(struct ip_vs_timeout_user))
2344 #define GET_DAEMON_ARG_LEN (sizeof(struct ip_vs_daemon_user) * 2)
2346 static const unsigned char get_arglen
[GET_CMDID(IP_VS_SO_GET_MAX
)+1] = {
2347 [GET_CMDID(IP_VS_SO_GET_VERSION
)] = 64,
2348 [GET_CMDID(IP_VS_SO_GET_INFO
)] = GET_INFO_ARG_LEN
,
2349 [GET_CMDID(IP_VS_SO_GET_SERVICES
)] = GET_SERVICES_ARG_LEN
,
2350 [GET_CMDID(IP_VS_SO_GET_SERVICE
)] = GET_SERVICE_ARG_LEN
,
2351 [GET_CMDID(IP_VS_SO_GET_DESTS
)] = GET_DESTS_ARG_LEN
,
2352 [GET_CMDID(IP_VS_SO_GET_TIMEOUT
)] = GET_TIMEOUT_ARG_LEN
,
2353 [GET_CMDID(IP_VS_SO_GET_DAEMON
)] = GET_DAEMON_ARG_LEN
,
2357 do_ip_vs_get_ctl(struct sock
*sk
, int cmd
, void __user
*user
, int *len
)
2359 unsigned char arg
[128];
2362 if (!capable(CAP_NET_ADMIN
))
2365 if (*len
< get_arglen
[GET_CMDID(cmd
)]) {
2366 IP_VS_ERR("get_ctl: len %u < %u\n",
2367 *len
, get_arglen
[GET_CMDID(cmd
)]);
2371 if (copy_from_user(arg
, user
, get_arglen
[GET_CMDID(cmd
)]) != 0)
2374 if (mutex_lock_interruptible(&__ip_vs_mutex
))
2375 return -ERESTARTSYS
;
2378 case IP_VS_SO_GET_VERSION
:
2382 sprintf(buf
, "IP Virtual Server version %d.%d.%d (size=%d)",
2383 NVERSION(IP_VS_VERSION_CODE
), IP_VS_CONN_TAB_SIZE
);
2384 if (copy_to_user(user
, buf
, strlen(buf
)+1) != 0) {
2388 *len
= strlen(buf
)+1;
2392 case IP_VS_SO_GET_INFO
:
2394 struct ip_vs_getinfo info
;
2395 info
.version
= IP_VS_VERSION_CODE
;
2396 info
.size
= IP_VS_CONN_TAB_SIZE
;
2397 info
.num_services
= ip_vs_num_services
;
2398 if (copy_to_user(user
, &info
, sizeof(info
)) != 0)
2403 case IP_VS_SO_GET_SERVICES
:
2405 struct ip_vs_get_services
*get
;
2408 get
= (struct ip_vs_get_services
*)arg
;
2409 size
= sizeof(*get
) +
2410 sizeof(struct ip_vs_service_entry
) * get
->num_services
;
2412 IP_VS_ERR("length: %u != %u\n", *len
, size
);
2416 ret
= __ip_vs_get_service_entries(get
, user
);
2420 case IP_VS_SO_GET_SERVICE
:
2422 struct ip_vs_service_entry
*entry
;
2423 struct ip_vs_service
*svc
;
2424 union nf_inet_addr addr
;
2426 entry
= (struct ip_vs_service_entry
*)arg
;
2427 addr
.ip
= entry
->addr
;
2429 svc
= __ip_vs_svc_fwm_get(AF_INET
, entry
->fwmark
);
2431 svc
= __ip_vs_service_get(AF_INET
, entry
->protocol
,
2432 &addr
, entry
->port
);
2434 ip_vs_copy_service(entry
, svc
);
2435 if (copy_to_user(user
, entry
, sizeof(*entry
)) != 0)
2437 ip_vs_service_put(svc
);
2443 case IP_VS_SO_GET_DESTS
:
2445 struct ip_vs_get_dests
*get
;
2448 get
= (struct ip_vs_get_dests
*)arg
;
2449 size
= sizeof(*get
) +
2450 sizeof(struct ip_vs_dest_entry
) * get
->num_dests
;
2452 IP_VS_ERR("length: %u != %u\n", *len
, size
);
2456 ret
= __ip_vs_get_dest_entries(get
, user
);
2460 case IP_VS_SO_GET_TIMEOUT
:
2462 struct ip_vs_timeout_user t
;
2464 __ip_vs_get_timeouts(&t
);
2465 if (copy_to_user(user
, &t
, sizeof(t
)) != 0)
2470 case IP_VS_SO_GET_DAEMON
:
2472 struct ip_vs_daemon_user d
[2];
2474 memset(&d
, 0, sizeof(d
));
2475 if (ip_vs_sync_state
& IP_VS_STATE_MASTER
) {
2476 d
[0].state
= IP_VS_STATE_MASTER
;
2477 strlcpy(d
[0].mcast_ifn
, ip_vs_master_mcast_ifn
, sizeof(d
[0].mcast_ifn
));
2478 d
[0].syncid
= ip_vs_master_syncid
;
2480 if (ip_vs_sync_state
& IP_VS_STATE_BACKUP
) {
2481 d
[1].state
= IP_VS_STATE_BACKUP
;
2482 strlcpy(d
[1].mcast_ifn
, ip_vs_backup_mcast_ifn
, sizeof(d
[1].mcast_ifn
));
2483 d
[1].syncid
= ip_vs_backup_syncid
;
2485 if (copy_to_user(user
, &d
, sizeof(d
)) != 0)
2495 mutex_unlock(&__ip_vs_mutex
);
2500 static struct nf_sockopt_ops ip_vs_sockopts
= {
2502 .set_optmin
= IP_VS_BASE_CTL
,
2503 .set_optmax
= IP_VS_SO_SET_MAX
+1,
2504 .set
= do_ip_vs_set_ctl
,
2505 .get_optmin
= IP_VS_BASE_CTL
,
2506 .get_optmax
= IP_VS_SO_GET_MAX
+1,
2507 .get
= do_ip_vs_get_ctl
,
2508 .owner
= THIS_MODULE
,
2512 * Generic Netlink interface
2515 /* IPVS genetlink family */
2516 static struct genl_family ip_vs_genl_family
= {
2517 .id
= GENL_ID_GENERATE
,
2519 .name
= IPVS_GENL_NAME
,
2520 .version
= IPVS_GENL_VERSION
,
2521 .maxattr
= IPVS_CMD_MAX
,
2524 /* Policy used for first-level command attributes */
2525 static const struct nla_policy ip_vs_cmd_policy
[IPVS_CMD_ATTR_MAX
+ 1] = {
2526 [IPVS_CMD_ATTR_SERVICE
] = { .type
= NLA_NESTED
},
2527 [IPVS_CMD_ATTR_DEST
] = { .type
= NLA_NESTED
},
2528 [IPVS_CMD_ATTR_DAEMON
] = { .type
= NLA_NESTED
},
2529 [IPVS_CMD_ATTR_TIMEOUT_TCP
] = { .type
= NLA_U32
},
2530 [IPVS_CMD_ATTR_TIMEOUT_TCP_FIN
] = { .type
= NLA_U32
},
2531 [IPVS_CMD_ATTR_TIMEOUT_UDP
] = { .type
= NLA_U32
},
2534 /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DAEMON */
2535 static const struct nla_policy ip_vs_daemon_policy
[IPVS_DAEMON_ATTR_MAX
+ 1] = {
2536 [IPVS_DAEMON_ATTR_STATE
] = { .type
= NLA_U32
},
2537 [IPVS_DAEMON_ATTR_MCAST_IFN
] = { .type
= NLA_NUL_STRING
,
2538 .len
= IP_VS_IFNAME_MAXLEN
},
2539 [IPVS_DAEMON_ATTR_SYNC_ID
] = { .type
= NLA_U32
},
2542 /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_SERVICE */
2543 static const struct nla_policy ip_vs_svc_policy
[IPVS_SVC_ATTR_MAX
+ 1] = {
2544 [IPVS_SVC_ATTR_AF
] = { .type
= NLA_U16
},
2545 [IPVS_SVC_ATTR_PROTOCOL
] = { .type
= NLA_U16
},
2546 [IPVS_SVC_ATTR_ADDR
] = { .type
= NLA_BINARY
,
2547 .len
= sizeof(union nf_inet_addr
) },
2548 [IPVS_SVC_ATTR_PORT
] = { .type
= NLA_U16
},
2549 [IPVS_SVC_ATTR_FWMARK
] = { .type
= NLA_U32
},
2550 [IPVS_SVC_ATTR_SCHED_NAME
] = { .type
= NLA_NUL_STRING
,
2551 .len
= IP_VS_SCHEDNAME_MAXLEN
},
2552 [IPVS_SVC_ATTR_FLAGS
] = { .type
= NLA_BINARY
,
2553 .len
= sizeof(struct ip_vs_flags
) },
2554 [IPVS_SVC_ATTR_TIMEOUT
] = { .type
= NLA_U32
},
2555 [IPVS_SVC_ATTR_NETMASK
] = { .type
= NLA_U32
},
2556 [IPVS_SVC_ATTR_STATS
] = { .type
= NLA_NESTED
},
2559 /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DEST */
2560 static const struct nla_policy ip_vs_dest_policy
[IPVS_DEST_ATTR_MAX
+ 1] = {
2561 [IPVS_DEST_ATTR_ADDR
] = { .type
= NLA_BINARY
,
2562 .len
= sizeof(union nf_inet_addr
) },
2563 [IPVS_DEST_ATTR_PORT
] = { .type
= NLA_U16
},
2564 [IPVS_DEST_ATTR_FWD_METHOD
] = { .type
= NLA_U32
},
2565 [IPVS_DEST_ATTR_WEIGHT
] = { .type
= NLA_U32
},
2566 [IPVS_DEST_ATTR_U_THRESH
] = { .type
= NLA_U32
},
2567 [IPVS_DEST_ATTR_L_THRESH
] = { .type
= NLA_U32
},
2568 [IPVS_DEST_ATTR_ACTIVE_CONNS
] = { .type
= NLA_U32
},
2569 [IPVS_DEST_ATTR_INACT_CONNS
] = { .type
= NLA_U32
},
2570 [IPVS_DEST_ATTR_PERSIST_CONNS
] = { .type
= NLA_U32
},
2571 [IPVS_DEST_ATTR_STATS
] = { .type
= NLA_NESTED
},
2574 static int ip_vs_genl_fill_stats(struct sk_buff
*skb
, int container_type
,
2575 struct ip_vs_stats
*stats
)
2577 struct nlattr
*nl_stats
= nla_nest_start(skb
, container_type
);
2581 spin_lock_bh(&stats
->lock
);
2583 NLA_PUT_U32(skb
, IPVS_STATS_ATTR_CONNS
, stats
->ustats
.conns
);
2584 NLA_PUT_U32(skb
, IPVS_STATS_ATTR_INPKTS
, stats
->ustats
.inpkts
);
2585 NLA_PUT_U32(skb
, IPVS_STATS_ATTR_OUTPKTS
, stats
->ustats
.outpkts
);
2586 NLA_PUT_U64(skb
, IPVS_STATS_ATTR_INBYTES
, stats
->ustats
.inbytes
);
2587 NLA_PUT_U64(skb
, IPVS_STATS_ATTR_OUTBYTES
, stats
->ustats
.outbytes
);
2588 NLA_PUT_U32(skb
, IPVS_STATS_ATTR_CPS
, stats
->ustats
.cps
);
2589 NLA_PUT_U32(skb
, IPVS_STATS_ATTR_INPPS
, stats
->ustats
.inpps
);
2590 NLA_PUT_U32(skb
, IPVS_STATS_ATTR_OUTPPS
, stats
->ustats
.outpps
);
2591 NLA_PUT_U32(skb
, IPVS_STATS_ATTR_INBPS
, stats
->ustats
.inbps
);
2592 NLA_PUT_U32(skb
, IPVS_STATS_ATTR_OUTBPS
, stats
->ustats
.outbps
);
2594 spin_unlock_bh(&stats
->lock
);
2596 nla_nest_end(skb
, nl_stats
);
2601 spin_unlock_bh(&stats
->lock
);
2602 nla_nest_cancel(skb
, nl_stats
);
2606 static int ip_vs_genl_fill_service(struct sk_buff
*skb
,
2607 struct ip_vs_service
*svc
)
2609 struct nlattr
*nl_service
;
2610 struct ip_vs_flags flags
= { .flags
= svc
->flags
,
2613 nl_service
= nla_nest_start(skb
, IPVS_CMD_ATTR_SERVICE
);
2617 NLA_PUT_U16(skb
, IPVS_SVC_ATTR_AF
, svc
->af
);
2620 NLA_PUT_U32(skb
, IPVS_SVC_ATTR_FWMARK
, svc
->fwmark
);
2622 NLA_PUT_U16(skb
, IPVS_SVC_ATTR_PROTOCOL
, svc
->protocol
);
2623 NLA_PUT(skb
, IPVS_SVC_ATTR_ADDR
, sizeof(svc
->addr
), &svc
->addr
);
2624 NLA_PUT_U16(skb
, IPVS_SVC_ATTR_PORT
, svc
->port
);
2627 NLA_PUT_STRING(skb
, IPVS_SVC_ATTR_SCHED_NAME
, svc
->scheduler
->name
);
2628 NLA_PUT(skb
, IPVS_SVC_ATTR_FLAGS
, sizeof(flags
), &flags
);
2629 NLA_PUT_U32(skb
, IPVS_SVC_ATTR_TIMEOUT
, svc
->timeout
/ HZ
);
2630 NLA_PUT_U32(skb
, IPVS_SVC_ATTR_NETMASK
, svc
->netmask
);
2632 if (ip_vs_genl_fill_stats(skb
, IPVS_SVC_ATTR_STATS
, &svc
->stats
))
2633 goto nla_put_failure
;
2635 nla_nest_end(skb
, nl_service
);
2640 nla_nest_cancel(skb
, nl_service
);
2644 static int ip_vs_genl_dump_service(struct sk_buff
*skb
,
2645 struct ip_vs_service
*svc
,
2646 struct netlink_callback
*cb
)
2650 hdr
= genlmsg_put(skb
, NETLINK_CB(cb
->skb
).pid
, cb
->nlh
->nlmsg_seq
,
2651 &ip_vs_genl_family
, NLM_F_MULTI
,
2652 IPVS_CMD_NEW_SERVICE
);
2656 if (ip_vs_genl_fill_service(skb
, svc
) < 0)
2657 goto nla_put_failure
;
2659 return genlmsg_end(skb
, hdr
);
2662 genlmsg_cancel(skb
, hdr
);
2666 static int ip_vs_genl_dump_services(struct sk_buff
*skb
,
2667 struct netlink_callback
*cb
)
2670 int start
= cb
->args
[0];
2671 struct ip_vs_service
*svc
;
2673 mutex_lock(&__ip_vs_mutex
);
2674 for (i
= 0; i
< IP_VS_SVC_TAB_SIZE
; i
++) {
2675 list_for_each_entry(svc
, &ip_vs_svc_table
[i
], s_list
) {
2678 if (ip_vs_genl_dump_service(skb
, svc
, cb
) < 0) {
2680 goto nla_put_failure
;
2685 for (i
= 0; i
< IP_VS_SVC_TAB_SIZE
; i
++) {
2686 list_for_each_entry(svc
, &ip_vs_svc_fwm_table
[i
], f_list
) {
2689 if (ip_vs_genl_dump_service(skb
, svc
, cb
) < 0) {
2691 goto nla_put_failure
;
2697 mutex_unlock(&__ip_vs_mutex
);
2703 static int ip_vs_genl_parse_service(struct ip_vs_service_user_kern
*usvc
,
2704 struct nlattr
*nla
, int full_entry
)
2706 struct nlattr
*attrs
[IPVS_SVC_ATTR_MAX
+ 1];
2707 struct nlattr
*nla_af
, *nla_port
, *nla_fwmark
, *nla_protocol
, *nla_addr
;
2709 /* Parse mandatory identifying service fields first */
2711 nla_parse_nested(attrs
, IPVS_SVC_ATTR_MAX
, nla
, ip_vs_svc_policy
))
2714 nla_af
= attrs
[IPVS_SVC_ATTR_AF
];
2715 nla_protocol
= attrs
[IPVS_SVC_ATTR_PROTOCOL
];
2716 nla_addr
= attrs
[IPVS_SVC_ATTR_ADDR
];
2717 nla_port
= attrs
[IPVS_SVC_ATTR_PORT
];
2718 nla_fwmark
= attrs
[IPVS_SVC_ATTR_FWMARK
];
2720 if (!(nla_af
&& (nla_fwmark
|| (nla_port
&& nla_protocol
&& nla_addr
))))
2723 usvc
->af
= nla_get_u16(nla_af
);
2724 #ifdef CONFIG_IP_VS_IPV6
2725 if (usvc
->af
!= AF_INET
&& usvc
->af
!= AF_INET6
)
2727 if (usvc
->af
!= AF_INET
)
2729 return -EAFNOSUPPORT
;
2732 usvc
->protocol
= IPPROTO_TCP
;
2733 usvc
->fwmark
= nla_get_u32(nla_fwmark
);
2735 usvc
->protocol
= nla_get_u16(nla_protocol
);
2736 nla_memcpy(&usvc
->addr
, nla_addr
, sizeof(usvc
->addr
));
2737 usvc
->port
= nla_get_u16(nla_port
);
2741 /* If a full entry was requested, check for the additional fields */
2743 struct nlattr
*nla_sched
, *nla_flags
, *nla_timeout
,
2745 struct ip_vs_flags flags
;
2746 struct ip_vs_service
*svc
;
2748 nla_sched
= attrs
[IPVS_SVC_ATTR_SCHED_NAME
];
2749 nla_flags
= attrs
[IPVS_SVC_ATTR_FLAGS
];
2750 nla_timeout
= attrs
[IPVS_SVC_ATTR_TIMEOUT
];
2751 nla_netmask
= attrs
[IPVS_SVC_ATTR_NETMASK
];
2753 if (!(nla_sched
&& nla_flags
&& nla_timeout
&& nla_netmask
))
2756 nla_memcpy(&flags
, nla_flags
, sizeof(flags
));
2758 /* prefill flags from service if it already exists */
2760 svc
= __ip_vs_svc_fwm_get(usvc
->af
, usvc
->fwmark
);
2762 svc
= __ip_vs_service_get(usvc
->af
, usvc
->protocol
,
2763 &usvc
->addr
, usvc
->port
);
2765 usvc
->flags
= svc
->flags
;
2766 ip_vs_service_put(svc
);
2770 /* set new flags from userland */
2771 usvc
->flags
= (usvc
->flags
& ~flags
.mask
) |
2772 (flags
.flags
& flags
.mask
);
2773 usvc
->sched_name
= nla_data(nla_sched
);
2774 usvc
->timeout
= nla_get_u32(nla_timeout
);
2775 usvc
->netmask
= nla_get_u32(nla_netmask
);
2781 static struct ip_vs_service
*ip_vs_genl_find_service(struct nlattr
*nla
)
2783 struct ip_vs_service_user_kern usvc
;
2786 ret
= ip_vs_genl_parse_service(&usvc
, nla
, 0);
2788 return ERR_PTR(ret
);
2791 return __ip_vs_svc_fwm_get(usvc
.af
, usvc
.fwmark
);
2793 return __ip_vs_service_get(usvc
.af
, usvc
.protocol
,
2794 &usvc
.addr
, usvc
.port
);
2797 static int ip_vs_genl_fill_dest(struct sk_buff
*skb
, struct ip_vs_dest
*dest
)
2799 struct nlattr
*nl_dest
;
2801 nl_dest
= nla_nest_start(skb
, IPVS_CMD_ATTR_DEST
);
2805 NLA_PUT(skb
, IPVS_DEST_ATTR_ADDR
, sizeof(dest
->addr
), &dest
->addr
);
2806 NLA_PUT_U16(skb
, IPVS_DEST_ATTR_PORT
, dest
->port
);
2808 NLA_PUT_U32(skb
, IPVS_DEST_ATTR_FWD_METHOD
,
2809 atomic_read(&dest
->conn_flags
) & IP_VS_CONN_F_FWD_MASK
);
2810 NLA_PUT_U32(skb
, IPVS_DEST_ATTR_WEIGHT
, atomic_read(&dest
->weight
));
2811 NLA_PUT_U32(skb
, IPVS_DEST_ATTR_U_THRESH
, dest
->u_threshold
);
2812 NLA_PUT_U32(skb
, IPVS_DEST_ATTR_L_THRESH
, dest
->l_threshold
);
2813 NLA_PUT_U32(skb
, IPVS_DEST_ATTR_ACTIVE_CONNS
,
2814 atomic_read(&dest
->activeconns
));
2815 NLA_PUT_U32(skb
, IPVS_DEST_ATTR_INACT_CONNS
,
2816 atomic_read(&dest
->inactconns
));
2817 NLA_PUT_U32(skb
, IPVS_DEST_ATTR_PERSIST_CONNS
,
2818 atomic_read(&dest
->persistconns
));
2820 if (ip_vs_genl_fill_stats(skb
, IPVS_DEST_ATTR_STATS
, &dest
->stats
))
2821 goto nla_put_failure
;
2823 nla_nest_end(skb
, nl_dest
);
2828 nla_nest_cancel(skb
, nl_dest
);
2832 static int ip_vs_genl_dump_dest(struct sk_buff
*skb
, struct ip_vs_dest
*dest
,
2833 struct netlink_callback
*cb
)
2837 hdr
= genlmsg_put(skb
, NETLINK_CB(cb
->skb
).pid
, cb
->nlh
->nlmsg_seq
,
2838 &ip_vs_genl_family
, NLM_F_MULTI
,
2843 if (ip_vs_genl_fill_dest(skb
, dest
) < 0)
2844 goto nla_put_failure
;
2846 return genlmsg_end(skb
, hdr
);
2849 genlmsg_cancel(skb
, hdr
);
2853 static int ip_vs_genl_dump_dests(struct sk_buff
*skb
,
2854 struct netlink_callback
*cb
)
2857 int start
= cb
->args
[0];
2858 struct ip_vs_service
*svc
;
2859 struct ip_vs_dest
*dest
;
2860 struct nlattr
*attrs
[IPVS_CMD_ATTR_MAX
+ 1];
2862 mutex_lock(&__ip_vs_mutex
);
2864 /* Try to find the service for which to dump destinations */
2865 if (nlmsg_parse(cb
->nlh
, GENL_HDRLEN
, attrs
,
2866 IPVS_CMD_ATTR_MAX
, ip_vs_cmd_policy
))
2869 svc
= ip_vs_genl_find_service(attrs
[IPVS_CMD_ATTR_SERVICE
]);
2870 if (IS_ERR(svc
) || svc
== NULL
)
2873 /* Dump the destinations */
2874 list_for_each_entry(dest
, &svc
->destinations
, n_list
) {
2877 if (ip_vs_genl_dump_dest(skb
, dest
, cb
) < 0) {
2879 goto nla_put_failure
;
2885 ip_vs_service_put(svc
);
2888 mutex_unlock(&__ip_vs_mutex
);
2893 static int ip_vs_genl_parse_dest(struct ip_vs_dest_user_kern
*udest
,
2894 struct nlattr
*nla
, int full_entry
)
2896 struct nlattr
*attrs
[IPVS_DEST_ATTR_MAX
+ 1];
2897 struct nlattr
*nla_addr
, *nla_port
;
2899 /* Parse mandatory identifying destination fields first */
2901 nla_parse_nested(attrs
, IPVS_DEST_ATTR_MAX
, nla
, ip_vs_dest_policy
))
2904 nla_addr
= attrs
[IPVS_DEST_ATTR_ADDR
];
2905 nla_port
= attrs
[IPVS_DEST_ATTR_PORT
];
2907 if (!(nla_addr
&& nla_port
))
2910 nla_memcpy(&udest
->addr
, nla_addr
, sizeof(udest
->addr
));
2911 udest
->port
= nla_get_u16(nla_port
);
2913 /* If a full entry was requested, check for the additional fields */
2915 struct nlattr
*nla_fwd
, *nla_weight
, *nla_u_thresh
,
2918 nla_fwd
= attrs
[IPVS_DEST_ATTR_FWD_METHOD
];
2919 nla_weight
= attrs
[IPVS_DEST_ATTR_WEIGHT
];
2920 nla_u_thresh
= attrs
[IPVS_DEST_ATTR_U_THRESH
];
2921 nla_l_thresh
= attrs
[IPVS_DEST_ATTR_L_THRESH
];
2923 if (!(nla_fwd
&& nla_weight
&& nla_u_thresh
&& nla_l_thresh
))
2926 udest
->conn_flags
= nla_get_u32(nla_fwd
)
2927 & IP_VS_CONN_F_FWD_MASK
;
2928 udest
->weight
= nla_get_u32(nla_weight
);
2929 udest
->u_threshold
= nla_get_u32(nla_u_thresh
);
2930 udest
->l_threshold
= nla_get_u32(nla_l_thresh
);
2936 static int ip_vs_genl_fill_daemon(struct sk_buff
*skb
, __be32 state
,
2937 const char *mcast_ifn
, __be32 syncid
)
2939 struct nlattr
*nl_daemon
;
2941 nl_daemon
= nla_nest_start(skb
, IPVS_CMD_ATTR_DAEMON
);
2945 NLA_PUT_U32(skb
, IPVS_DAEMON_ATTR_STATE
, state
);
2946 NLA_PUT_STRING(skb
, IPVS_DAEMON_ATTR_MCAST_IFN
, mcast_ifn
);
2947 NLA_PUT_U32(skb
, IPVS_DAEMON_ATTR_SYNC_ID
, syncid
);
2949 nla_nest_end(skb
, nl_daemon
);
2954 nla_nest_cancel(skb
, nl_daemon
);
2958 static int ip_vs_genl_dump_daemon(struct sk_buff
*skb
, __be32 state
,
2959 const char *mcast_ifn
, __be32 syncid
,
2960 struct netlink_callback
*cb
)
2963 hdr
= genlmsg_put(skb
, NETLINK_CB(cb
->skb
).pid
, cb
->nlh
->nlmsg_seq
,
2964 &ip_vs_genl_family
, NLM_F_MULTI
,
2965 IPVS_CMD_NEW_DAEMON
);
2969 if (ip_vs_genl_fill_daemon(skb
, state
, mcast_ifn
, syncid
))
2970 goto nla_put_failure
;
2972 return genlmsg_end(skb
, hdr
);
2975 genlmsg_cancel(skb
, hdr
);
2979 static int ip_vs_genl_dump_daemons(struct sk_buff
*skb
,
2980 struct netlink_callback
*cb
)
2982 mutex_lock(&__ip_vs_mutex
);
2983 if ((ip_vs_sync_state
& IP_VS_STATE_MASTER
) && !cb
->args
[0]) {
2984 if (ip_vs_genl_dump_daemon(skb
, IP_VS_STATE_MASTER
,
2985 ip_vs_master_mcast_ifn
,
2986 ip_vs_master_syncid
, cb
) < 0)
2987 goto nla_put_failure
;
2992 if ((ip_vs_sync_state
& IP_VS_STATE_BACKUP
) && !cb
->args
[1]) {
2993 if (ip_vs_genl_dump_daemon(skb
, IP_VS_STATE_BACKUP
,
2994 ip_vs_backup_mcast_ifn
,
2995 ip_vs_backup_syncid
, cb
) < 0)
2996 goto nla_put_failure
;
3002 mutex_unlock(&__ip_vs_mutex
);
3007 static int ip_vs_genl_new_daemon(struct nlattr
**attrs
)
3009 if (!(attrs
[IPVS_DAEMON_ATTR_STATE
] &&
3010 attrs
[IPVS_DAEMON_ATTR_MCAST_IFN
] &&
3011 attrs
[IPVS_DAEMON_ATTR_SYNC_ID
]))
3014 return start_sync_thread(nla_get_u32(attrs
[IPVS_DAEMON_ATTR_STATE
]),
3015 nla_data(attrs
[IPVS_DAEMON_ATTR_MCAST_IFN
]),
3016 nla_get_u32(attrs
[IPVS_DAEMON_ATTR_SYNC_ID
]));
3019 static int ip_vs_genl_del_daemon(struct nlattr
**attrs
)
3021 if (!attrs
[IPVS_DAEMON_ATTR_STATE
])
3024 return stop_sync_thread(nla_get_u32(attrs
[IPVS_DAEMON_ATTR_STATE
]));
3027 static int ip_vs_genl_set_config(struct nlattr
**attrs
)
3029 struct ip_vs_timeout_user t
;
3031 __ip_vs_get_timeouts(&t
);
3033 if (attrs
[IPVS_CMD_ATTR_TIMEOUT_TCP
])
3034 t
.tcp_timeout
= nla_get_u32(attrs
[IPVS_CMD_ATTR_TIMEOUT_TCP
]);
3036 if (attrs
[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN
])
3038 nla_get_u32(attrs
[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN
]);
3040 if (attrs
[IPVS_CMD_ATTR_TIMEOUT_UDP
])
3041 t
.udp_timeout
= nla_get_u32(attrs
[IPVS_CMD_ATTR_TIMEOUT_UDP
]);
3043 return ip_vs_set_timeout(&t
);
3046 static int ip_vs_genl_set_cmd(struct sk_buff
*skb
, struct genl_info
*info
)
3048 struct ip_vs_service
*svc
= NULL
;
3049 struct ip_vs_service_user_kern usvc
;
3050 struct ip_vs_dest_user_kern udest
;
3052 int need_full_svc
= 0, need_full_dest
= 0;
3054 cmd
= info
->genlhdr
->cmd
;
3056 mutex_lock(&__ip_vs_mutex
);
3058 if (cmd
== IPVS_CMD_FLUSH
) {
3059 ret
= ip_vs_flush();
3061 } else if (cmd
== IPVS_CMD_SET_CONFIG
) {
3062 ret
= ip_vs_genl_set_config(info
->attrs
);
3064 } else if (cmd
== IPVS_CMD_NEW_DAEMON
||
3065 cmd
== IPVS_CMD_DEL_DAEMON
) {
3067 struct nlattr
*daemon_attrs
[IPVS_DAEMON_ATTR_MAX
+ 1];
3069 if (!info
->attrs
[IPVS_CMD_ATTR_DAEMON
] ||
3070 nla_parse_nested(daemon_attrs
, IPVS_DAEMON_ATTR_MAX
,
3071 info
->attrs
[IPVS_CMD_ATTR_DAEMON
],
3072 ip_vs_daemon_policy
)) {
3077 if (cmd
== IPVS_CMD_NEW_DAEMON
)
3078 ret
= ip_vs_genl_new_daemon(daemon_attrs
);
3080 ret
= ip_vs_genl_del_daemon(daemon_attrs
);
3082 } else if (cmd
== IPVS_CMD_ZERO
&&
3083 !info
->attrs
[IPVS_CMD_ATTR_SERVICE
]) {
3084 ret
= ip_vs_zero_all();
3088 /* All following commands require a service argument, so check if we
3089 * received a valid one. We need a full service specification when
3090 * adding / editing a service. Only identifying members otherwise. */
3091 if (cmd
== IPVS_CMD_NEW_SERVICE
|| cmd
== IPVS_CMD_SET_SERVICE
)
3094 ret
= ip_vs_genl_parse_service(&usvc
,
3095 info
->attrs
[IPVS_CMD_ATTR_SERVICE
],
3100 /* Lookup the exact service by <protocol, addr, port> or fwmark */
3101 if (usvc
.fwmark
== 0)
3102 svc
= __ip_vs_service_get(usvc
.af
, usvc
.protocol
,
3103 &usvc
.addr
, usvc
.port
);
3105 svc
= __ip_vs_svc_fwm_get(usvc
.af
, usvc
.fwmark
);
3107 /* Unless we're adding a new service, the service must already exist */
3108 if ((cmd
!= IPVS_CMD_NEW_SERVICE
) && (svc
== NULL
)) {
3113 /* Destination commands require a valid destination argument. For
3114 * adding / editing a destination, we need a full destination
3116 if (cmd
== IPVS_CMD_NEW_DEST
|| cmd
== IPVS_CMD_SET_DEST
||
3117 cmd
== IPVS_CMD_DEL_DEST
) {
3118 if (cmd
!= IPVS_CMD_DEL_DEST
)
3121 ret
= ip_vs_genl_parse_dest(&udest
,
3122 info
->attrs
[IPVS_CMD_ATTR_DEST
],
3129 case IPVS_CMD_NEW_SERVICE
:
3131 ret
= ip_vs_add_service(&usvc
, &svc
);
3135 case IPVS_CMD_SET_SERVICE
:
3136 ret
= ip_vs_edit_service(svc
, &usvc
);
3138 case IPVS_CMD_DEL_SERVICE
:
3139 ret
= ip_vs_del_service(svc
);
3141 case IPVS_CMD_NEW_DEST
:
3142 ret
= ip_vs_add_dest(svc
, &udest
);
3144 case IPVS_CMD_SET_DEST
:
3145 ret
= ip_vs_edit_dest(svc
, &udest
);
3147 case IPVS_CMD_DEL_DEST
:
3148 ret
= ip_vs_del_dest(svc
, &udest
);
3151 ret
= ip_vs_zero_service(svc
);
3159 ip_vs_service_put(svc
);
3160 mutex_unlock(&__ip_vs_mutex
);
3165 static int ip_vs_genl_get_cmd(struct sk_buff
*skb
, struct genl_info
*info
)
3167 struct sk_buff
*msg
;
3169 int ret
, cmd
, reply_cmd
;
3171 cmd
= info
->genlhdr
->cmd
;
3173 if (cmd
== IPVS_CMD_GET_SERVICE
)
3174 reply_cmd
= IPVS_CMD_NEW_SERVICE
;
3175 else if (cmd
== IPVS_CMD_GET_INFO
)
3176 reply_cmd
= IPVS_CMD_SET_INFO
;
3177 else if (cmd
== IPVS_CMD_GET_CONFIG
)
3178 reply_cmd
= IPVS_CMD_SET_CONFIG
;
3180 IP_VS_ERR("unknown Generic Netlink command\n");
3184 msg
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
3188 mutex_lock(&__ip_vs_mutex
);
3190 reply
= genlmsg_put_reply(msg
, info
, &ip_vs_genl_family
, 0, reply_cmd
);
3192 goto nla_put_failure
;
3195 case IPVS_CMD_GET_SERVICE
:
3197 struct ip_vs_service
*svc
;
3199 svc
= ip_vs_genl_find_service(info
->attrs
[IPVS_CMD_ATTR_SERVICE
]);
3204 ret
= ip_vs_genl_fill_service(msg
, svc
);
3205 ip_vs_service_put(svc
);
3207 goto nla_put_failure
;
3216 case IPVS_CMD_GET_CONFIG
:
3218 struct ip_vs_timeout_user t
;
3220 __ip_vs_get_timeouts(&t
);
3221 #ifdef CONFIG_IP_VS_PROTO_TCP
3222 NLA_PUT_U32(msg
, IPVS_CMD_ATTR_TIMEOUT_TCP
, t
.tcp_timeout
);
3223 NLA_PUT_U32(msg
, IPVS_CMD_ATTR_TIMEOUT_TCP_FIN
,
3226 #ifdef CONFIG_IP_VS_PROTO_UDP
3227 NLA_PUT_U32(msg
, IPVS_CMD_ATTR_TIMEOUT_UDP
, t
.udp_timeout
);
3233 case IPVS_CMD_GET_INFO
:
3234 NLA_PUT_U32(msg
, IPVS_INFO_ATTR_VERSION
, IP_VS_VERSION_CODE
);
3235 NLA_PUT_U32(msg
, IPVS_INFO_ATTR_CONN_TAB_SIZE
,
3236 IP_VS_CONN_TAB_SIZE
);
3240 genlmsg_end(msg
, reply
);
3241 ret
= genlmsg_unicast(msg
, info
->snd_pid
);
3245 IP_VS_ERR("not enough space in Netlink message\n");
3251 mutex_unlock(&__ip_vs_mutex
);
3257 static struct genl_ops ip_vs_genl_ops
[] __read_mostly
= {
3259 .cmd
= IPVS_CMD_NEW_SERVICE
,
3260 .flags
= GENL_ADMIN_PERM
,
3261 .policy
= ip_vs_cmd_policy
,
3262 .doit
= ip_vs_genl_set_cmd
,
3265 .cmd
= IPVS_CMD_SET_SERVICE
,
3266 .flags
= GENL_ADMIN_PERM
,
3267 .policy
= ip_vs_cmd_policy
,
3268 .doit
= ip_vs_genl_set_cmd
,
3271 .cmd
= IPVS_CMD_DEL_SERVICE
,
3272 .flags
= GENL_ADMIN_PERM
,
3273 .policy
= ip_vs_cmd_policy
,
3274 .doit
= ip_vs_genl_set_cmd
,
3277 .cmd
= IPVS_CMD_GET_SERVICE
,
3278 .flags
= GENL_ADMIN_PERM
,
3279 .doit
= ip_vs_genl_get_cmd
,
3280 .dumpit
= ip_vs_genl_dump_services
,
3281 .policy
= ip_vs_cmd_policy
,
3284 .cmd
= IPVS_CMD_NEW_DEST
,
3285 .flags
= GENL_ADMIN_PERM
,
3286 .policy
= ip_vs_cmd_policy
,
3287 .doit
= ip_vs_genl_set_cmd
,
3290 .cmd
= IPVS_CMD_SET_DEST
,
3291 .flags
= GENL_ADMIN_PERM
,
3292 .policy
= ip_vs_cmd_policy
,
3293 .doit
= ip_vs_genl_set_cmd
,
3296 .cmd
= IPVS_CMD_DEL_DEST
,
3297 .flags
= GENL_ADMIN_PERM
,
3298 .policy
= ip_vs_cmd_policy
,
3299 .doit
= ip_vs_genl_set_cmd
,
3302 .cmd
= IPVS_CMD_GET_DEST
,
3303 .flags
= GENL_ADMIN_PERM
,
3304 .policy
= ip_vs_cmd_policy
,
3305 .dumpit
= ip_vs_genl_dump_dests
,
3308 .cmd
= IPVS_CMD_NEW_DAEMON
,
3309 .flags
= GENL_ADMIN_PERM
,
3310 .policy
= ip_vs_cmd_policy
,
3311 .doit
= ip_vs_genl_set_cmd
,
3314 .cmd
= IPVS_CMD_DEL_DAEMON
,
3315 .flags
= GENL_ADMIN_PERM
,
3316 .policy
= ip_vs_cmd_policy
,
3317 .doit
= ip_vs_genl_set_cmd
,
3320 .cmd
= IPVS_CMD_GET_DAEMON
,
3321 .flags
= GENL_ADMIN_PERM
,
3322 .dumpit
= ip_vs_genl_dump_daemons
,
3325 .cmd
= IPVS_CMD_SET_CONFIG
,
3326 .flags
= GENL_ADMIN_PERM
,
3327 .policy
= ip_vs_cmd_policy
,
3328 .doit
= ip_vs_genl_set_cmd
,
3331 .cmd
= IPVS_CMD_GET_CONFIG
,
3332 .flags
= GENL_ADMIN_PERM
,
3333 .doit
= ip_vs_genl_get_cmd
,
3336 .cmd
= IPVS_CMD_GET_INFO
,
3337 .flags
= GENL_ADMIN_PERM
,
3338 .doit
= ip_vs_genl_get_cmd
,
3341 .cmd
= IPVS_CMD_ZERO
,
3342 .flags
= GENL_ADMIN_PERM
,
3343 .policy
= ip_vs_cmd_policy
,
3344 .doit
= ip_vs_genl_set_cmd
,
3347 .cmd
= IPVS_CMD_FLUSH
,
3348 .flags
= GENL_ADMIN_PERM
,
3349 .doit
= ip_vs_genl_set_cmd
,
3353 static int __init
ip_vs_genl_register(void)
3357 ret
= genl_register_family(&ip_vs_genl_family
);
3361 for (i
= 0; i
< ARRAY_SIZE(ip_vs_genl_ops
); i
++) {
3362 ret
= genl_register_ops(&ip_vs_genl_family
, &ip_vs_genl_ops
[i
]);
3369 genl_unregister_family(&ip_vs_genl_family
);
3373 static void ip_vs_genl_unregister(void)
3375 genl_unregister_family(&ip_vs_genl_family
);
3378 /* End of Generic Netlink interface definitions */
3381 int __init
ip_vs_control_init(void)
3388 ret
= nf_register_sockopt(&ip_vs_sockopts
);
3390 IP_VS_ERR("cannot register sockopt.\n");
3394 ret
= ip_vs_genl_register();
3396 IP_VS_ERR("cannot register Generic Netlink interface.\n");
3397 nf_unregister_sockopt(&ip_vs_sockopts
);
3401 proc_net_fops_create(&init_net
, "ip_vs", 0, &ip_vs_info_fops
);
3402 proc_net_fops_create(&init_net
, "ip_vs_stats",0, &ip_vs_stats_fops
);
3404 sysctl_header
= register_sysctl_paths(net_vs_ctl_path
, vs_vars
);
3406 /* Initialize ip_vs_svc_table, ip_vs_svc_fwm_table, ip_vs_rtable */
3407 for(idx
= 0; idx
< IP_VS_SVC_TAB_SIZE
; idx
++) {
3408 INIT_LIST_HEAD(&ip_vs_svc_table
[idx
]);
3409 INIT_LIST_HEAD(&ip_vs_svc_fwm_table
[idx
]);
3411 for(idx
= 0; idx
< IP_VS_RTAB_SIZE
; idx
++) {
3412 INIT_LIST_HEAD(&ip_vs_rtable
[idx
]);
3415 ip_vs_new_estimator(&ip_vs_stats
);
3417 /* Hook the defense timer */
3418 schedule_delayed_work(&defense_work
, DEFENSE_TIMER_PERIOD
);
3425 void ip_vs_control_cleanup(void)
3428 ip_vs_trash_cleanup();
3429 cancel_rearming_delayed_work(&defense_work
);
3430 cancel_work_sync(&defense_work
.work
);
3431 ip_vs_kill_estimator(&ip_vs_stats
);
3432 unregister_sysctl_table(sysctl_header
);
3433 proc_net_remove(&init_net
, "ip_vs_stats");
3434 proc_net_remove(&init_net
, "ip_vs");
3435 ip_vs_genl_unregister();
3436 nf_unregister_sockopt(&ip_vs_sockopts
);