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 #define KMSG_COMPONENT "IPVS"
22 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
24 #include <linux/module.h>
25 #include <linux/init.h>
26 #include <linux/types.h>
27 #include <linux/capability.h>
29 #include <linux/sysctl.h>
30 #include <linux/proc_fs.h>
31 #include <linux/workqueue.h>
32 #include <linux/swap.h>
33 #include <linux/seq_file.h>
34 #include <linux/slab.h>
36 #include <linux/netfilter.h>
37 #include <linux/netfilter_ipv4.h>
38 #include <linux/mutex.h>
40 #include <net/net_namespace.h>
41 #include <linux/nsproxy.h>
43 #ifdef CONFIG_IP_VS_IPV6
45 #include <net/ip6_route.h>
47 #include <net/route.h>
49 #include <net/genetlink.h>
51 #include <asm/uaccess.h>
53 #include <net/ip_vs.h>
55 /* semaphore for IPVS sockopts. And, [gs]etsockopt may sleep. */
56 static DEFINE_MUTEX(__ip_vs_mutex
);
58 /* sysctl variables */
60 #ifdef CONFIG_IP_VS_DEBUG
61 static int sysctl_ip_vs_debug_level
= 0;
63 int ip_vs_get_debug_level(void)
65 return sysctl_ip_vs_debug_level
;
71 static void __ip_vs_del_service(struct ip_vs_service
*svc
, bool cleanup
);
74 #ifdef CONFIG_IP_VS_IPV6
75 /* Taken from rt6_fill_node() in net/ipv6/route.c, is there a better way? */
76 static bool __ip_vs_addr_is_local_v6(struct net
*net
,
77 const struct in6_addr
*addr
)
82 struct dst_entry
*dst
= ip6_route_output(net
, NULL
, &fl6
);
85 is_local
= !dst
->error
&& dst
->dev
&& (dst
->dev
->flags
& IFF_LOOPBACK
);
94 * update_defense_level is called from keventd and from sysctl,
95 * so it needs to protect itself from softirqs
97 static void update_defense_level(struct netns_ipvs
*ipvs
)
100 static int old_secure_tcp
= 0;
105 /* we only count free and buffered memory (in pages) */
107 availmem
= i
.freeram
+ i
.bufferram
;
108 /* however in linux 2.5 the i.bufferram is total page cache size,
110 /* si_swapinfo(&i); */
111 /* availmem = availmem - (i.totalswap - i.freeswap); */
113 nomem
= (availmem
< ipvs
->sysctl_amemthresh
);
118 spin_lock(&ipvs
->dropentry_lock
);
119 switch (ipvs
->sysctl_drop_entry
) {
121 atomic_set(&ipvs
->dropentry
, 0);
125 atomic_set(&ipvs
->dropentry
, 1);
126 ipvs
->sysctl_drop_entry
= 2;
128 atomic_set(&ipvs
->dropentry
, 0);
133 atomic_set(&ipvs
->dropentry
, 1);
135 atomic_set(&ipvs
->dropentry
, 0);
136 ipvs
->sysctl_drop_entry
= 1;
140 atomic_set(&ipvs
->dropentry
, 1);
143 spin_unlock(&ipvs
->dropentry_lock
);
146 spin_lock(&ipvs
->droppacket_lock
);
147 switch (ipvs
->sysctl_drop_packet
) {
153 ipvs
->drop_rate
= ipvs
->drop_counter
154 = ipvs
->sysctl_amemthresh
/
155 (ipvs
->sysctl_amemthresh
-availmem
);
156 ipvs
->sysctl_drop_packet
= 2;
163 ipvs
->drop_rate
= ipvs
->drop_counter
164 = ipvs
->sysctl_amemthresh
/
165 (ipvs
->sysctl_amemthresh
-availmem
);
168 ipvs
->sysctl_drop_packet
= 1;
172 ipvs
->drop_rate
= ipvs
->sysctl_am_droprate
;
175 spin_unlock(&ipvs
->droppacket_lock
);
178 spin_lock(&ipvs
->securetcp_lock
);
179 switch (ipvs
->sysctl_secure_tcp
) {
181 if (old_secure_tcp
>= 2)
186 if (old_secure_tcp
< 2)
188 ipvs
->sysctl_secure_tcp
= 2;
190 if (old_secure_tcp
>= 2)
196 if (old_secure_tcp
< 2)
199 if (old_secure_tcp
>= 2)
201 ipvs
->sysctl_secure_tcp
= 1;
205 if (old_secure_tcp
< 2)
209 old_secure_tcp
= ipvs
->sysctl_secure_tcp
;
211 ip_vs_protocol_timeout_change(ipvs
,
212 ipvs
->sysctl_secure_tcp
> 1);
213 spin_unlock(&ipvs
->securetcp_lock
);
220 * Timer for checking the defense
222 #define DEFENSE_TIMER_PERIOD 1*HZ
224 static void defense_work_handler(struct work_struct
*work
)
226 struct netns_ipvs
*ipvs
=
227 container_of(work
, struct netns_ipvs
, defense_work
.work
);
229 update_defense_level(ipvs
);
230 if (atomic_read(&ipvs
->dropentry
))
231 ip_vs_random_dropentry(ipvs
->net
);
232 schedule_delayed_work(&ipvs
->defense_work
, DEFENSE_TIMER_PERIOD
);
237 ip_vs_use_count_inc(void)
239 return try_module_get(THIS_MODULE
);
243 ip_vs_use_count_dec(void)
245 module_put(THIS_MODULE
);
250 * Hash table: for virtual service lookups
252 #define IP_VS_SVC_TAB_BITS 8
253 #define IP_VS_SVC_TAB_SIZE (1 << IP_VS_SVC_TAB_BITS)
254 #define IP_VS_SVC_TAB_MASK (IP_VS_SVC_TAB_SIZE - 1)
256 /* the service table hashed by <protocol, addr, port> */
257 static struct hlist_head ip_vs_svc_table
[IP_VS_SVC_TAB_SIZE
];
258 /* the service table hashed by fwmark */
259 static struct hlist_head ip_vs_svc_fwm_table
[IP_VS_SVC_TAB_SIZE
];
263 * Returns hash value for virtual service
265 static inline unsigned int
266 ip_vs_svc_hashkey(struct net
*net
, int af
, unsigned int proto
,
267 const union nf_inet_addr
*addr
, __be16 port
)
269 register unsigned int porth
= ntohs(port
);
270 __be32 addr_fold
= addr
->ip
;
273 #ifdef CONFIG_IP_VS_IPV6
275 addr_fold
= addr
->ip6
[0]^addr
->ip6
[1]^
276 addr
->ip6
[2]^addr
->ip6
[3];
278 ahash
= ntohl(addr_fold
);
279 ahash
^= ((size_t) net
>> 8);
281 return (proto
^ ahash
^ (porth
>> IP_VS_SVC_TAB_BITS
) ^ porth
) &
286 * Returns hash value of fwmark for virtual service lookup
288 static inline unsigned int ip_vs_svc_fwm_hashkey(struct net
*net
, __u32 fwmark
)
290 return (((size_t)net
>>8) ^ fwmark
) & IP_VS_SVC_TAB_MASK
;
294 * Hashes a service in the ip_vs_svc_table by <netns,proto,addr,port>
295 * or in the ip_vs_svc_fwm_table by fwmark.
296 * Should be called with locked tables.
298 static int ip_vs_svc_hash(struct ip_vs_service
*svc
)
302 if (svc
->flags
& IP_VS_SVC_F_HASHED
) {
303 pr_err("%s(): request for already hashed, called from %pF\n",
304 __func__
, __builtin_return_address(0));
308 if (svc
->fwmark
== 0) {
310 * Hash it by <netns,protocol,addr,port> in ip_vs_svc_table
312 hash
= ip_vs_svc_hashkey(svc
->net
, svc
->af
, svc
->protocol
,
313 &svc
->addr
, svc
->port
);
314 hlist_add_head_rcu(&svc
->s_list
, &ip_vs_svc_table
[hash
]);
317 * Hash it by fwmark in svc_fwm_table
319 hash
= ip_vs_svc_fwm_hashkey(svc
->net
, svc
->fwmark
);
320 hlist_add_head_rcu(&svc
->f_list
, &ip_vs_svc_fwm_table
[hash
]);
323 svc
->flags
|= IP_VS_SVC_F_HASHED
;
324 /* increase its refcnt because it is referenced by the svc table */
325 atomic_inc(&svc
->refcnt
);
331 * Unhashes a service from svc_table / svc_fwm_table.
332 * Should be called with locked tables.
334 static int ip_vs_svc_unhash(struct ip_vs_service
*svc
)
336 if (!(svc
->flags
& IP_VS_SVC_F_HASHED
)) {
337 pr_err("%s(): request for unhash flagged, called from %pF\n",
338 __func__
, __builtin_return_address(0));
342 if (svc
->fwmark
== 0) {
343 /* Remove it from the svc_table table */
344 hlist_del_rcu(&svc
->s_list
);
346 /* Remove it from the svc_fwm_table table */
347 hlist_del_rcu(&svc
->f_list
);
350 svc
->flags
&= ~IP_VS_SVC_F_HASHED
;
351 atomic_dec(&svc
->refcnt
);
357 * Get service by {netns, proto,addr,port} in the service table.
359 static inline struct ip_vs_service
*
360 __ip_vs_service_find(struct net
*net
, int af
, __u16 protocol
,
361 const union nf_inet_addr
*vaddr
, __be16 vport
)
364 struct ip_vs_service
*svc
;
366 /* Check for "full" addressed entries */
367 hash
= ip_vs_svc_hashkey(net
, af
, protocol
, vaddr
, vport
);
369 hlist_for_each_entry_rcu(svc
, &ip_vs_svc_table
[hash
], s_list
) {
371 && ip_vs_addr_equal(af
, &svc
->addr
, vaddr
)
372 && (svc
->port
== vport
)
373 && (svc
->protocol
== protocol
)
374 && net_eq(svc
->net
, net
)) {
385 * Get service by {fwmark} in the service table.
387 static inline struct ip_vs_service
*
388 __ip_vs_svc_fwm_find(struct net
*net
, int af
, __u32 fwmark
)
391 struct ip_vs_service
*svc
;
393 /* Check for fwmark addressed entries */
394 hash
= ip_vs_svc_fwm_hashkey(net
, fwmark
);
396 hlist_for_each_entry_rcu(svc
, &ip_vs_svc_fwm_table
[hash
], f_list
) {
397 if (svc
->fwmark
== fwmark
&& svc
->af
== af
398 && net_eq(svc
->net
, net
)) {
407 /* Find service, called under RCU lock */
408 struct ip_vs_service
*
409 ip_vs_service_find(struct net
*net
, int af
, __u32 fwmark
, __u16 protocol
,
410 const union nf_inet_addr
*vaddr
, __be16 vport
)
412 struct ip_vs_service
*svc
;
413 struct netns_ipvs
*ipvs
= net_ipvs(net
);
416 * Check the table hashed by fwmark first
419 svc
= __ip_vs_svc_fwm_find(net
, af
, fwmark
);
425 * Check the table hashed by <protocol,addr,port>
426 * for "full" addressed entries
428 svc
= __ip_vs_service_find(net
, af
, protocol
, vaddr
, vport
);
431 && protocol
== IPPROTO_TCP
432 && atomic_read(&ipvs
->ftpsvc_counter
)
433 && (vport
== FTPDATA
|| ntohs(vport
) >= PROT_SOCK
)) {
435 * Check if ftp service entry exists, the packet
436 * might belong to FTP data connections.
438 svc
= __ip_vs_service_find(net
, af
, protocol
, vaddr
, FTPPORT
);
442 && atomic_read(&ipvs
->nullsvc_counter
)) {
444 * Check if the catch-all port (port zero) exists
446 svc
= __ip_vs_service_find(net
, af
, protocol
, vaddr
, 0);
450 IP_VS_DBG_BUF(9, "lookup service: fwm %u %s %s:%u %s\n",
451 fwmark
, ip_vs_proto_name(protocol
),
452 IP_VS_DBG_ADDR(af
, vaddr
), ntohs(vport
),
453 svc
? "hit" : "not hit");
460 __ip_vs_bind_svc(struct ip_vs_dest
*dest
, struct ip_vs_service
*svc
)
462 atomic_inc(&svc
->refcnt
);
463 rcu_assign_pointer(dest
->svc
, svc
);
466 static void ip_vs_service_free(struct ip_vs_service
*svc
)
468 free_percpu(svc
->stats
.cpustats
);
472 static void ip_vs_service_rcu_free(struct rcu_head
*head
)
474 struct ip_vs_service
*svc
;
476 svc
= container_of(head
, struct ip_vs_service
, rcu_head
);
477 ip_vs_service_free(svc
);
480 static void __ip_vs_svc_put(struct ip_vs_service
*svc
, bool do_delay
)
482 if (atomic_dec_and_test(&svc
->refcnt
)) {
483 IP_VS_DBG_BUF(3, "Removing service %u/%s:%u\n",
485 IP_VS_DBG_ADDR(svc
->af
, &svc
->addr
),
488 call_rcu(&svc
->rcu_head
, ip_vs_service_rcu_free
);
490 ip_vs_service_free(svc
);
496 * Returns hash value for real service
498 static inline unsigned int ip_vs_rs_hashkey(int af
,
499 const union nf_inet_addr
*addr
,
502 register unsigned int porth
= ntohs(port
);
503 __be32 addr_fold
= addr
->ip
;
505 #ifdef CONFIG_IP_VS_IPV6
507 addr_fold
= addr
->ip6
[0]^addr
->ip6
[1]^
508 addr
->ip6
[2]^addr
->ip6
[3];
511 return (ntohl(addr_fold
)^(porth
>>IP_VS_RTAB_BITS
)^porth
)
515 /* Hash ip_vs_dest in rs_table by <proto,addr,port>. */
516 static void ip_vs_rs_hash(struct netns_ipvs
*ipvs
, struct ip_vs_dest
*dest
)
520 if (dest
->in_rs_table
)
524 * Hash by proto,addr,port,
525 * which are the parameters of the real service.
527 hash
= ip_vs_rs_hashkey(dest
->af
, &dest
->addr
, dest
->port
);
529 hlist_add_head_rcu(&dest
->d_list
, &ipvs
->rs_table
[hash
]);
530 dest
->in_rs_table
= 1;
533 /* Unhash ip_vs_dest from rs_table. */
534 static void ip_vs_rs_unhash(struct ip_vs_dest
*dest
)
537 * Remove it from the rs_table table.
539 if (dest
->in_rs_table
) {
540 hlist_del_rcu(&dest
->d_list
);
541 dest
->in_rs_table
= 0;
545 /* Check if real service by <proto,addr,port> is present */
546 bool ip_vs_has_real_service(struct net
*net
, int af
, __u16 protocol
,
547 const union nf_inet_addr
*daddr
, __be16 dport
)
549 struct netns_ipvs
*ipvs
= net_ipvs(net
);
551 struct ip_vs_dest
*dest
;
553 /* Check for "full" addressed entries */
554 hash
= ip_vs_rs_hashkey(af
, daddr
, dport
);
557 hlist_for_each_entry_rcu(dest
, &ipvs
->rs_table
[hash
], d_list
) {
558 if (dest
->port
== dport
&&
560 ip_vs_addr_equal(af
, &dest
->addr
, daddr
) &&
561 (dest
->protocol
== protocol
|| dest
->vfwmark
)) {
572 /* Lookup destination by {addr,port} in the given service
573 * Called under RCU lock.
575 static struct ip_vs_dest
*
576 ip_vs_lookup_dest(struct ip_vs_service
*svc
, int dest_af
,
577 const union nf_inet_addr
*daddr
, __be16 dport
)
579 struct ip_vs_dest
*dest
;
582 * Find the destination for the given service
584 list_for_each_entry_rcu(dest
, &svc
->destinations
, n_list
) {
585 if ((dest
->af
== dest_af
) &&
586 ip_vs_addr_equal(dest_af
, &dest
->addr
, daddr
) &&
587 (dest
->port
== dport
)) {
597 * Find destination by {daddr,dport,vaddr,protocol}
598 * Created to be used in ip_vs_process_message() in
599 * the backup synchronization daemon. It finds the
600 * destination to be bound to the received connection
602 * Called under RCU lock, no refcnt is returned.
604 struct ip_vs_dest
*ip_vs_find_dest(struct net
*net
, int svc_af
, int dest_af
,
605 const union nf_inet_addr
*daddr
,
607 const union nf_inet_addr
*vaddr
,
608 __be16 vport
, __u16 protocol
, __u32 fwmark
,
611 struct ip_vs_dest
*dest
;
612 struct ip_vs_service
*svc
;
615 svc
= ip_vs_service_find(net
, svc_af
, fwmark
, protocol
, vaddr
, vport
);
618 if (fwmark
&& (flags
& IP_VS_CONN_F_FWD_MASK
) != IP_VS_CONN_F_MASQ
)
620 dest
= ip_vs_lookup_dest(svc
, dest_af
, daddr
, port
);
622 dest
= ip_vs_lookup_dest(svc
, dest_af
, daddr
, port
^ dport
);
626 void ip_vs_dest_dst_rcu_free(struct rcu_head
*head
)
628 struct ip_vs_dest_dst
*dest_dst
= container_of(head
,
629 struct ip_vs_dest_dst
,
632 dst_release(dest_dst
->dst_cache
);
636 /* Release dest_dst and dst_cache for dest in user context */
637 static void __ip_vs_dst_cache_reset(struct ip_vs_dest
*dest
)
639 struct ip_vs_dest_dst
*old
;
641 old
= rcu_dereference_protected(dest
->dest_dst
, 1);
643 RCU_INIT_POINTER(dest
->dest_dst
, NULL
);
644 call_rcu(&old
->rcu_head
, ip_vs_dest_dst_rcu_free
);
649 * Lookup dest by {svc,addr,port} in the destination trash.
650 * The destination trash is used to hold the destinations that are removed
651 * from the service table but are still referenced by some conn entries.
652 * The reason to add the destination trash is when the dest is temporary
653 * down (either by administrator or by monitor program), the dest can be
654 * picked back from the trash, the remaining connections to the dest can
655 * continue, and the counting information of the dest is also useful for
658 static struct ip_vs_dest
*
659 ip_vs_trash_get_dest(struct ip_vs_service
*svc
, int dest_af
,
660 const union nf_inet_addr
*daddr
, __be16 dport
)
662 struct ip_vs_dest
*dest
;
663 struct netns_ipvs
*ipvs
= net_ipvs(svc
->net
);
666 * Find the destination in trash
668 spin_lock_bh(&ipvs
->dest_trash_lock
);
669 list_for_each_entry(dest
, &ipvs
->dest_trash
, t_list
) {
670 IP_VS_DBG_BUF(3, "Destination %u/%s:%u still in trash, "
673 IP_VS_DBG_ADDR(dest
->af
, &dest
->addr
),
675 atomic_read(&dest
->refcnt
));
676 if (dest
->af
== dest_af
&&
677 ip_vs_addr_equal(dest_af
, &dest
->addr
, daddr
) &&
678 dest
->port
== dport
&&
679 dest
->vfwmark
== svc
->fwmark
&&
680 dest
->protocol
== svc
->protocol
&&
682 (ip_vs_addr_equal(svc
->af
, &dest
->vaddr
, &svc
->addr
) &&
683 dest
->vport
== svc
->port
))) {
685 list_del(&dest
->t_list
);
686 ip_vs_dest_hold(dest
);
694 spin_unlock_bh(&ipvs
->dest_trash_lock
);
699 static void ip_vs_dest_free(struct ip_vs_dest
*dest
)
701 struct ip_vs_service
*svc
= rcu_dereference_protected(dest
->svc
, 1);
703 __ip_vs_dst_cache_reset(dest
);
704 __ip_vs_svc_put(svc
, false);
705 free_percpu(dest
->stats
.cpustats
);
706 ip_vs_dest_put_and_free(dest
);
710 * Clean up all the destinations in the trash
711 * Called by the ip_vs_control_cleanup()
713 * When the ip_vs_control_clearup is activated by ipvs module exit,
714 * the service tables must have been flushed and all the connections
715 * are expired, and the refcnt of each destination in the trash must
716 * be 0, so we simply release them here.
718 static void ip_vs_trash_cleanup(struct net
*net
)
720 struct ip_vs_dest
*dest
, *nxt
;
721 struct netns_ipvs
*ipvs
= net_ipvs(net
);
723 del_timer_sync(&ipvs
->dest_trash_timer
);
724 /* No need to use dest_trash_lock */
725 list_for_each_entry_safe(dest
, nxt
, &ipvs
->dest_trash
, t_list
) {
726 list_del(&dest
->t_list
);
727 ip_vs_dest_free(dest
);
732 ip_vs_copy_stats(struct ip_vs_stats_user
*dst
, struct ip_vs_stats
*src
)
734 #define IP_VS_SHOW_STATS_COUNTER(c) dst->c = src->ustats.c - src->ustats0.c
736 spin_lock_bh(&src
->lock
);
738 IP_VS_SHOW_STATS_COUNTER(conns
);
739 IP_VS_SHOW_STATS_COUNTER(inpkts
);
740 IP_VS_SHOW_STATS_COUNTER(outpkts
);
741 IP_VS_SHOW_STATS_COUNTER(inbytes
);
742 IP_VS_SHOW_STATS_COUNTER(outbytes
);
744 ip_vs_read_estimator(dst
, src
);
746 spin_unlock_bh(&src
->lock
);
750 ip_vs_zero_stats(struct ip_vs_stats
*stats
)
752 spin_lock_bh(&stats
->lock
);
754 /* get current counters as zero point, rates are zeroed */
756 #define IP_VS_ZERO_STATS_COUNTER(c) stats->ustats0.c = stats->ustats.c
758 IP_VS_ZERO_STATS_COUNTER(conns
);
759 IP_VS_ZERO_STATS_COUNTER(inpkts
);
760 IP_VS_ZERO_STATS_COUNTER(outpkts
);
761 IP_VS_ZERO_STATS_COUNTER(inbytes
);
762 IP_VS_ZERO_STATS_COUNTER(outbytes
);
764 ip_vs_zero_estimator(stats
);
766 spin_unlock_bh(&stats
->lock
);
770 * Update a destination in the given service
773 __ip_vs_update_dest(struct ip_vs_service
*svc
, struct ip_vs_dest
*dest
,
774 struct ip_vs_dest_user_kern
*udest
, int add
)
776 struct netns_ipvs
*ipvs
= net_ipvs(svc
->net
);
777 struct ip_vs_service
*old_svc
;
778 struct ip_vs_scheduler
*sched
;
781 /* We cannot modify an address and change the address family */
782 BUG_ON(!add
&& udest
->af
!= dest
->af
);
784 if (add
&& udest
->af
!= svc
->af
)
785 ipvs
->mixed_address_family_dests
++;
787 /* set the weight and the flags */
788 atomic_set(&dest
->weight
, udest
->weight
);
789 conn_flags
= udest
->conn_flags
& IP_VS_CONN_F_DEST_MASK
;
790 conn_flags
|= IP_VS_CONN_F_INACTIVE
;
792 /* set the IP_VS_CONN_F_NOOUTPUT flag if not masquerading/NAT */
793 if ((conn_flags
& IP_VS_CONN_F_FWD_MASK
) != IP_VS_CONN_F_MASQ
) {
794 conn_flags
|= IP_VS_CONN_F_NOOUTPUT
;
797 * Put the real service in rs_table if not present.
798 * For now only for NAT!
800 ip_vs_rs_hash(ipvs
, dest
);
802 atomic_set(&dest
->conn_flags
, conn_flags
);
804 /* bind the service */
805 old_svc
= rcu_dereference_protected(dest
->svc
, 1);
807 __ip_vs_bind_svc(dest
, svc
);
809 if (old_svc
!= svc
) {
810 ip_vs_zero_stats(&dest
->stats
);
811 __ip_vs_bind_svc(dest
, svc
);
812 __ip_vs_svc_put(old_svc
, true);
816 /* set the dest status flags */
817 dest
->flags
|= IP_VS_DEST_F_AVAILABLE
;
819 if (udest
->u_threshold
== 0 || udest
->u_threshold
> dest
->u_threshold
)
820 dest
->flags
&= ~IP_VS_DEST_F_OVERLOAD
;
821 dest
->u_threshold
= udest
->u_threshold
;
822 dest
->l_threshold
= udest
->l_threshold
;
824 dest
->af
= udest
->af
;
826 spin_lock_bh(&dest
->dst_lock
);
827 __ip_vs_dst_cache_reset(dest
);
828 spin_unlock_bh(&dest
->dst_lock
);
830 sched
= rcu_dereference_protected(svc
->scheduler
, 1);
832 ip_vs_start_estimator(svc
->net
, &dest
->stats
);
833 list_add_rcu(&dest
->n_list
, &svc
->destinations
);
836 sched
->add_dest(svc
, dest
);
839 sched
->upd_dest(svc
, dest
);
845 * Create a destination for the given service
848 ip_vs_new_dest(struct ip_vs_service
*svc
, struct ip_vs_dest_user_kern
*udest
,
849 struct ip_vs_dest
**dest_p
)
851 struct ip_vs_dest
*dest
;
852 unsigned int atype
, i
;
856 #ifdef CONFIG_IP_VS_IPV6
857 if (udest
->af
== AF_INET6
) {
858 atype
= ipv6_addr_type(&udest
->addr
.in6
);
859 if ((!(atype
& IPV6_ADDR_UNICAST
) ||
860 atype
& IPV6_ADDR_LINKLOCAL
) &&
861 !__ip_vs_addr_is_local_v6(svc
->net
, &udest
->addr
.in6
))
866 atype
= inet_addr_type(svc
->net
, udest
->addr
.ip
);
867 if (atype
!= RTN_LOCAL
&& atype
!= RTN_UNICAST
)
871 dest
= kzalloc(sizeof(struct ip_vs_dest
), GFP_KERNEL
);
875 dest
->stats
.cpustats
= alloc_percpu(struct ip_vs_cpu_stats
);
876 if (!dest
->stats
.cpustats
)
879 for_each_possible_cpu(i
) {
880 struct ip_vs_cpu_stats
*ip_vs_dest_stats
;
881 ip_vs_dest_stats
= per_cpu_ptr(dest
->stats
.cpustats
, i
);
882 u64_stats_init(&ip_vs_dest_stats
->syncp
);
885 dest
->af
= udest
->af
;
886 dest
->protocol
= svc
->protocol
;
887 dest
->vaddr
= svc
->addr
;
888 dest
->vport
= svc
->port
;
889 dest
->vfwmark
= svc
->fwmark
;
890 ip_vs_addr_copy(udest
->af
, &dest
->addr
, &udest
->addr
);
891 dest
->port
= udest
->port
;
893 atomic_set(&dest
->activeconns
, 0);
894 atomic_set(&dest
->inactconns
, 0);
895 atomic_set(&dest
->persistconns
, 0);
896 atomic_set(&dest
->refcnt
, 1);
898 INIT_HLIST_NODE(&dest
->d_list
);
899 spin_lock_init(&dest
->dst_lock
);
900 spin_lock_init(&dest
->stats
.lock
);
901 __ip_vs_update_dest(svc
, dest
, udest
, 1);
915 * Add a destination into an existing service
918 ip_vs_add_dest(struct ip_vs_service
*svc
, struct ip_vs_dest_user_kern
*udest
)
920 struct ip_vs_dest
*dest
;
921 union nf_inet_addr daddr
;
922 __be16 dport
= udest
->port
;
927 if (udest
->weight
< 0) {
928 pr_err("%s(): server weight less than zero\n", __func__
);
932 if (udest
->l_threshold
> udest
->u_threshold
) {
933 pr_err("%s(): lower threshold is higher than upper threshold\n",
938 ip_vs_addr_copy(udest
->af
, &daddr
, &udest
->addr
);
940 /* We use function that requires RCU lock */
942 dest
= ip_vs_lookup_dest(svc
, udest
->af
, &daddr
, dport
);
946 IP_VS_DBG(1, "%s(): dest already exists\n", __func__
);
951 * Check if the dest already exists in the trash and
952 * is from the same service
954 dest
= ip_vs_trash_get_dest(svc
, udest
->af
, &daddr
, dport
);
957 IP_VS_DBG_BUF(3, "Get destination %s:%u from trash, "
958 "dest->refcnt=%d, service %u/%s:%u\n",
959 IP_VS_DBG_ADDR(udest
->af
, &daddr
), ntohs(dport
),
960 atomic_read(&dest
->refcnt
),
962 IP_VS_DBG_ADDR(svc
->af
, &dest
->vaddr
),
965 __ip_vs_update_dest(svc
, dest
, udest
, 1);
969 * Allocate and initialize the dest structure
971 ret
= ip_vs_new_dest(svc
, udest
, &dest
);
980 * Edit a destination in the given service
983 ip_vs_edit_dest(struct ip_vs_service
*svc
, struct ip_vs_dest_user_kern
*udest
)
985 struct ip_vs_dest
*dest
;
986 union nf_inet_addr daddr
;
987 __be16 dport
= udest
->port
;
991 if (udest
->weight
< 0) {
992 pr_err("%s(): server weight less than zero\n", __func__
);
996 if (udest
->l_threshold
> udest
->u_threshold
) {
997 pr_err("%s(): lower threshold is higher than upper threshold\n",
1002 ip_vs_addr_copy(udest
->af
, &daddr
, &udest
->addr
);
1004 /* We use function that requires RCU lock */
1006 dest
= ip_vs_lookup_dest(svc
, udest
->af
, &daddr
, dport
);
1010 IP_VS_DBG(1, "%s(): dest doesn't exist\n", __func__
);
1014 __ip_vs_update_dest(svc
, dest
, udest
, 0);
1021 * Delete a destination (must be already unlinked from the service)
1023 static void __ip_vs_del_dest(struct net
*net
, struct ip_vs_dest
*dest
,
1026 struct netns_ipvs
*ipvs
= net_ipvs(net
);
1028 ip_vs_stop_estimator(net
, &dest
->stats
);
1031 * Remove it from the d-linked list with the real services.
1033 ip_vs_rs_unhash(dest
);
1035 spin_lock_bh(&ipvs
->dest_trash_lock
);
1036 IP_VS_DBG_BUF(3, "Moving dest %s:%u into trash, dest->refcnt=%d\n",
1037 IP_VS_DBG_ADDR(dest
->af
, &dest
->addr
), ntohs(dest
->port
),
1038 atomic_read(&dest
->refcnt
));
1039 if (list_empty(&ipvs
->dest_trash
) && !cleanup
)
1040 mod_timer(&ipvs
->dest_trash_timer
,
1041 jiffies
+ (IP_VS_DEST_TRASH_PERIOD
>> 1));
1042 /* dest lives in trash without reference */
1043 list_add(&dest
->t_list
, &ipvs
->dest_trash
);
1044 dest
->idle_start
= 0;
1045 spin_unlock_bh(&ipvs
->dest_trash_lock
);
1046 ip_vs_dest_put(dest
);
1051 * Unlink a destination from the given service
1053 static void __ip_vs_unlink_dest(struct ip_vs_service
*svc
,
1054 struct ip_vs_dest
*dest
,
1057 dest
->flags
&= ~IP_VS_DEST_F_AVAILABLE
;
1060 * Remove it from the d-linked destination list.
1062 list_del_rcu(&dest
->n_list
);
1065 if (dest
->af
!= svc
->af
)
1066 net_ipvs(svc
->net
)->mixed_address_family_dests
--;
1069 struct ip_vs_scheduler
*sched
;
1071 sched
= rcu_dereference_protected(svc
->scheduler
, 1);
1072 if (sched
->del_dest
)
1073 sched
->del_dest(svc
, dest
);
1079 * Delete a destination server in the given service
1082 ip_vs_del_dest(struct ip_vs_service
*svc
, struct ip_vs_dest_user_kern
*udest
)
1084 struct ip_vs_dest
*dest
;
1085 __be16 dport
= udest
->port
;
1089 /* We use function that requires RCU lock */
1091 dest
= ip_vs_lookup_dest(svc
, udest
->af
, &udest
->addr
, dport
);
1095 IP_VS_DBG(1, "%s(): destination not found!\n", __func__
);
1100 * Unlink dest from the service
1102 __ip_vs_unlink_dest(svc
, dest
, 1);
1105 * Delete the destination
1107 __ip_vs_del_dest(svc
->net
, dest
, false);
1114 static void ip_vs_dest_trash_expire(unsigned long data
)
1116 struct net
*net
= (struct net
*) data
;
1117 struct netns_ipvs
*ipvs
= net_ipvs(net
);
1118 struct ip_vs_dest
*dest
, *next
;
1119 unsigned long now
= jiffies
;
1121 spin_lock(&ipvs
->dest_trash_lock
);
1122 list_for_each_entry_safe(dest
, next
, &ipvs
->dest_trash
, t_list
) {
1123 if (atomic_read(&dest
->refcnt
) > 0)
1125 if (dest
->idle_start
) {
1126 if (time_before(now
, dest
->idle_start
+
1127 IP_VS_DEST_TRASH_PERIOD
))
1130 dest
->idle_start
= max(1UL, now
);
1133 IP_VS_DBG_BUF(3, "Removing destination %u/%s:%u from trash\n",
1135 IP_VS_DBG_ADDR(dest
->af
, &dest
->addr
),
1137 list_del(&dest
->t_list
);
1138 ip_vs_dest_free(dest
);
1140 if (!list_empty(&ipvs
->dest_trash
))
1141 mod_timer(&ipvs
->dest_trash_timer
,
1142 jiffies
+ (IP_VS_DEST_TRASH_PERIOD
>> 1));
1143 spin_unlock(&ipvs
->dest_trash_lock
);
1147 * Add a service into the service hash table
1150 ip_vs_add_service(struct net
*net
, struct ip_vs_service_user_kern
*u
,
1151 struct ip_vs_service
**svc_p
)
1154 struct ip_vs_scheduler
*sched
= NULL
;
1155 struct ip_vs_pe
*pe
= NULL
;
1156 struct ip_vs_service
*svc
= NULL
;
1157 struct netns_ipvs
*ipvs
= net_ipvs(net
);
1159 /* increase the module use count */
1160 ip_vs_use_count_inc();
1162 /* Lookup the scheduler by 'u->sched_name' */
1163 sched
= ip_vs_scheduler_get(u
->sched_name
);
1164 if (sched
== NULL
) {
1165 pr_info("Scheduler module ip_vs_%s not found\n", u
->sched_name
);
1170 if (u
->pe_name
&& *u
->pe_name
) {
1171 pe
= ip_vs_pe_getbyname(u
->pe_name
);
1173 pr_info("persistence engine module ip_vs_pe_%s "
1174 "not found\n", u
->pe_name
);
1180 #ifdef CONFIG_IP_VS_IPV6
1181 if (u
->af
== AF_INET6
) {
1182 __u32 plen
= (__force __u32
) u
->netmask
;
1184 if (plen
< 1 || plen
> 128) {
1191 svc
= kzalloc(sizeof(struct ip_vs_service
), GFP_KERNEL
);
1193 IP_VS_DBG(1, "%s(): no memory\n", __func__
);
1197 svc
->stats
.cpustats
= alloc_percpu(struct ip_vs_cpu_stats
);
1198 if (!svc
->stats
.cpustats
) {
1203 for_each_possible_cpu(i
) {
1204 struct ip_vs_cpu_stats
*ip_vs_stats
;
1205 ip_vs_stats
= per_cpu_ptr(svc
->stats
.cpustats
, i
);
1206 u64_stats_init(&ip_vs_stats
->syncp
);
1210 /* I'm the first user of the service */
1211 atomic_set(&svc
->refcnt
, 0);
1214 svc
->protocol
= u
->protocol
;
1215 ip_vs_addr_copy(svc
->af
, &svc
->addr
, &u
->addr
);
1216 svc
->port
= u
->port
;
1217 svc
->fwmark
= u
->fwmark
;
1218 svc
->flags
= u
->flags
;
1219 svc
->timeout
= u
->timeout
* HZ
;
1220 svc
->netmask
= u
->netmask
;
1223 INIT_LIST_HEAD(&svc
->destinations
);
1224 spin_lock_init(&svc
->sched_lock
);
1225 spin_lock_init(&svc
->stats
.lock
);
1227 /* Bind the scheduler */
1228 ret
= ip_vs_bind_scheduler(svc
, sched
);
1233 /* Bind the ct retriever */
1234 RCU_INIT_POINTER(svc
->pe
, pe
);
1237 /* Update the virtual service counters */
1238 if (svc
->port
== FTPPORT
)
1239 atomic_inc(&ipvs
->ftpsvc_counter
);
1240 else if (svc
->port
== 0)
1241 atomic_inc(&ipvs
->nullsvc_counter
);
1243 ip_vs_start_estimator(net
, &svc
->stats
);
1245 /* Count only IPv4 services for old get/setsockopt interface */
1246 if (svc
->af
== AF_INET
)
1247 ipvs
->num_services
++;
1249 /* Hash the service into the service table */
1250 ip_vs_svc_hash(svc
);
1253 /* Now there is a service - full throttle */
1260 ip_vs_unbind_scheduler(svc
, sched
);
1261 ip_vs_service_free(svc
);
1263 ip_vs_scheduler_put(sched
);
1266 /* decrease the module use count */
1267 ip_vs_use_count_dec();
1274 * Edit a service and bind it with a new scheduler
1277 ip_vs_edit_service(struct ip_vs_service
*svc
, struct ip_vs_service_user_kern
*u
)
1279 struct ip_vs_scheduler
*sched
, *old_sched
;
1280 struct ip_vs_pe
*pe
= NULL
, *old_pe
= NULL
;
1284 * Lookup the scheduler, by 'u->sched_name'
1286 sched
= ip_vs_scheduler_get(u
->sched_name
);
1287 if (sched
== NULL
) {
1288 pr_info("Scheduler module ip_vs_%s not found\n", u
->sched_name
);
1293 if (u
->pe_name
&& *u
->pe_name
) {
1294 pe
= ip_vs_pe_getbyname(u
->pe_name
);
1296 pr_info("persistence engine module ip_vs_pe_%s "
1297 "not found\n", u
->pe_name
);
1304 #ifdef CONFIG_IP_VS_IPV6
1305 if (u
->af
== AF_INET6
) {
1306 __u32 plen
= (__force __u32
) u
->netmask
;
1308 if (plen
< 1 || plen
> 128) {
1315 old_sched
= rcu_dereference_protected(svc
->scheduler
, 1);
1316 if (sched
!= old_sched
) {
1317 /* Bind the new scheduler */
1318 ret
= ip_vs_bind_scheduler(svc
, sched
);
1323 /* Unbind the old scheduler on success */
1324 ip_vs_unbind_scheduler(svc
, old_sched
);
1328 * Set the flags and timeout value
1330 svc
->flags
= u
->flags
| IP_VS_SVC_F_HASHED
;
1331 svc
->timeout
= u
->timeout
* HZ
;
1332 svc
->netmask
= u
->netmask
;
1334 old_pe
= rcu_dereference_protected(svc
->pe
, 1);
1336 rcu_assign_pointer(svc
->pe
, pe
);
1339 ip_vs_scheduler_put(old_sched
);
1340 ip_vs_pe_put(old_pe
);
1345 * Delete a service from the service list
1346 * - The service must be unlinked, unlocked and not referenced!
1347 * - We are called under _bh lock
1349 static void __ip_vs_del_service(struct ip_vs_service
*svc
, bool cleanup
)
1351 struct ip_vs_dest
*dest
, *nxt
;
1352 struct ip_vs_scheduler
*old_sched
;
1353 struct ip_vs_pe
*old_pe
;
1354 struct netns_ipvs
*ipvs
= net_ipvs(svc
->net
);
1356 pr_info("%s: enter\n", __func__
);
1358 /* Count only IPv4 services for old get/setsockopt interface */
1359 if (svc
->af
== AF_INET
)
1360 ipvs
->num_services
--;
1362 ip_vs_stop_estimator(svc
->net
, &svc
->stats
);
1364 /* Unbind scheduler */
1365 old_sched
= rcu_dereference_protected(svc
->scheduler
, 1);
1366 ip_vs_unbind_scheduler(svc
, old_sched
);
1367 ip_vs_scheduler_put(old_sched
);
1369 /* Unbind persistence engine, keep svc->pe */
1370 old_pe
= rcu_dereference_protected(svc
->pe
, 1);
1371 ip_vs_pe_put(old_pe
);
1374 * Unlink the whole destination list
1376 list_for_each_entry_safe(dest
, nxt
, &svc
->destinations
, n_list
) {
1377 __ip_vs_unlink_dest(svc
, dest
, 0);
1378 __ip_vs_del_dest(svc
->net
, dest
, cleanup
);
1382 * Update the virtual service counters
1384 if (svc
->port
== FTPPORT
)
1385 atomic_dec(&ipvs
->ftpsvc_counter
);
1386 else if (svc
->port
== 0)
1387 atomic_dec(&ipvs
->nullsvc_counter
);
1390 * Free the service if nobody refers to it
1392 __ip_vs_svc_put(svc
, true);
1394 /* decrease the module use count */
1395 ip_vs_use_count_dec();
1399 * Unlink a service from list and try to delete it if its refcnt reached 0
1401 static void ip_vs_unlink_service(struct ip_vs_service
*svc
, bool cleanup
)
1403 /* Hold svc to avoid double release from dest_trash */
1404 atomic_inc(&svc
->refcnt
);
1406 * Unhash it from the service table
1408 ip_vs_svc_unhash(svc
);
1410 __ip_vs_del_service(svc
, cleanup
);
1414 * Delete a service from the service list
1416 static int ip_vs_del_service(struct ip_vs_service
*svc
)
1420 ip_vs_unlink_service(svc
, false);
1427 * Flush all the virtual services
1429 static int ip_vs_flush(struct net
*net
, bool cleanup
)
1432 struct ip_vs_service
*svc
;
1433 struct hlist_node
*n
;
1436 * Flush the service table hashed by <netns,protocol,addr,port>
1438 for(idx
= 0; idx
< IP_VS_SVC_TAB_SIZE
; idx
++) {
1439 hlist_for_each_entry_safe(svc
, n
, &ip_vs_svc_table
[idx
],
1441 if (net_eq(svc
->net
, net
))
1442 ip_vs_unlink_service(svc
, cleanup
);
1447 * Flush the service table hashed by fwmark
1449 for(idx
= 0; idx
< IP_VS_SVC_TAB_SIZE
; idx
++) {
1450 hlist_for_each_entry_safe(svc
, n
, &ip_vs_svc_fwm_table
[idx
],
1452 if (net_eq(svc
->net
, net
))
1453 ip_vs_unlink_service(svc
, cleanup
);
1461 * Delete service by {netns} in the service table.
1462 * Called by __ip_vs_cleanup()
1464 void ip_vs_service_net_cleanup(struct net
*net
)
1467 /* Check for "full" addressed entries */
1468 mutex_lock(&__ip_vs_mutex
);
1469 ip_vs_flush(net
, true);
1470 mutex_unlock(&__ip_vs_mutex
);
1474 /* Put all references for device (dst_cache) */
1476 ip_vs_forget_dev(struct ip_vs_dest
*dest
, struct net_device
*dev
)
1478 struct ip_vs_dest_dst
*dest_dst
;
1480 spin_lock_bh(&dest
->dst_lock
);
1481 dest_dst
= rcu_dereference_protected(dest
->dest_dst
, 1);
1482 if (dest_dst
&& dest_dst
->dst_cache
->dev
== dev
) {
1483 IP_VS_DBG_BUF(3, "Reset dev:%s dest %s:%u ,dest->refcnt=%d\n",
1485 IP_VS_DBG_ADDR(dest
->af
, &dest
->addr
),
1487 atomic_read(&dest
->refcnt
));
1488 __ip_vs_dst_cache_reset(dest
);
1490 spin_unlock_bh(&dest
->dst_lock
);
1493 /* Netdev event receiver
1494 * Currently only NETDEV_DOWN is handled to release refs to cached dsts
1496 static int ip_vs_dst_event(struct notifier_block
*this, unsigned long event
,
1499 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
1500 struct net
*net
= dev_net(dev
);
1501 struct netns_ipvs
*ipvs
= net_ipvs(net
);
1502 struct ip_vs_service
*svc
;
1503 struct ip_vs_dest
*dest
;
1506 if (event
!= NETDEV_DOWN
|| !ipvs
)
1508 IP_VS_DBG(3, "%s() dev=%s\n", __func__
, dev
->name
);
1510 mutex_lock(&__ip_vs_mutex
);
1511 for (idx
= 0; idx
< IP_VS_SVC_TAB_SIZE
; idx
++) {
1512 hlist_for_each_entry(svc
, &ip_vs_svc_table
[idx
], s_list
) {
1513 if (net_eq(svc
->net
, net
)) {
1514 list_for_each_entry(dest
, &svc
->destinations
,
1516 ip_vs_forget_dev(dest
, dev
);
1521 hlist_for_each_entry(svc
, &ip_vs_svc_fwm_table
[idx
], f_list
) {
1522 if (net_eq(svc
->net
, net
)) {
1523 list_for_each_entry(dest
, &svc
->destinations
,
1525 ip_vs_forget_dev(dest
, dev
);
1532 spin_lock_bh(&ipvs
->dest_trash_lock
);
1533 list_for_each_entry(dest
, &ipvs
->dest_trash
, t_list
) {
1534 ip_vs_forget_dev(dest
, dev
);
1536 spin_unlock_bh(&ipvs
->dest_trash_lock
);
1537 mutex_unlock(&__ip_vs_mutex
);
1543 * Zero counters in a service or all services
1545 static int ip_vs_zero_service(struct ip_vs_service
*svc
)
1547 struct ip_vs_dest
*dest
;
1549 list_for_each_entry(dest
, &svc
->destinations
, n_list
) {
1550 ip_vs_zero_stats(&dest
->stats
);
1552 ip_vs_zero_stats(&svc
->stats
);
1556 static int ip_vs_zero_all(struct net
*net
)
1559 struct ip_vs_service
*svc
;
1561 for(idx
= 0; idx
< IP_VS_SVC_TAB_SIZE
; idx
++) {
1562 hlist_for_each_entry(svc
, &ip_vs_svc_table
[idx
], s_list
) {
1563 if (net_eq(svc
->net
, net
))
1564 ip_vs_zero_service(svc
);
1568 for(idx
= 0; idx
< IP_VS_SVC_TAB_SIZE
; idx
++) {
1569 hlist_for_each_entry(svc
, &ip_vs_svc_fwm_table
[idx
], f_list
) {
1570 if (net_eq(svc
->net
, net
))
1571 ip_vs_zero_service(svc
);
1575 ip_vs_zero_stats(&net_ipvs(net
)->tot_stats
);
1579 #ifdef CONFIG_SYSCTL
1582 static int three
= 3;
1585 proc_do_defense_mode(struct ctl_table
*table
, int write
,
1586 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
1588 struct net
*net
= current
->nsproxy
->net_ns
;
1589 int *valp
= table
->data
;
1593 rc
= proc_dointvec(table
, write
, buffer
, lenp
, ppos
);
1594 if (write
&& (*valp
!= val
)) {
1595 if ((*valp
< 0) || (*valp
> 3)) {
1596 /* Restore the correct value */
1599 update_defense_level(net_ipvs(net
));
1606 proc_do_sync_threshold(struct ctl_table
*table
, int write
,
1607 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
1609 int *valp
= table
->data
;
1613 /* backup the value first */
1614 memcpy(val
, valp
, sizeof(val
));
1616 rc
= proc_dointvec(table
, write
, buffer
, lenp
, ppos
);
1617 if (write
&& (valp
[0] < 0 || valp
[1] < 0 ||
1618 (valp
[0] >= valp
[1] && valp
[1]))) {
1619 /* Restore the correct value */
1620 memcpy(valp
, val
, sizeof(val
));
1626 proc_do_sync_mode(struct ctl_table
*table
, int write
,
1627 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
1629 int *valp
= table
->data
;
1633 rc
= proc_dointvec(table
, write
, buffer
, lenp
, ppos
);
1634 if (write
&& (*valp
!= val
)) {
1635 if ((*valp
< 0) || (*valp
> 1)) {
1636 /* Restore the correct value */
1644 proc_do_sync_ports(struct ctl_table
*table
, int write
,
1645 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
1647 int *valp
= table
->data
;
1651 rc
= proc_dointvec(table
, write
, buffer
, lenp
, ppos
);
1652 if (write
&& (*valp
!= val
)) {
1653 if (*valp
< 1 || !is_power_of_2(*valp
)) {
1654 /* Restore the correct value */
1662 * IPVS sysctl table (under the /proc/sys/net/ipv4/vs/)
1663 * Do not change order or insert new entries without
1664 * align with netns init in ip_vs_control_net_init()
1667 static struct ctl_table vs_vars
[] = {
1669 .procname
= "amemthresh",
1670 .maxlen
= sizeof(int),
1672 .proc_handler
= proc_dointvec
,
1675 .procname
= "am_droprate",
1676 .maxlen
= sizeof(int),
1678 .proc_handler
= proc_dointvec
,
1681 .procname
= "drop_entry",
1682 .maxlen
= sizeof(int),
1684 .proc_handler
= proc_do_defense_mode
,
1687 .procname
= "drop_packet",
1688 .maxlen
= sizeof(int),
1690 .proc_handler
= proc_do_defense_mode
,
1692 #ifdef CONFIG_IP_VS_NFCT
1694 .procname
= "conntrack",
1695 .maxlen
= sizeof(int),
1697 .proc_handler
= &proc_dointvec
,
1701 .procname
= "secure_tcp",
1702 .maxlen
= sizeof(int),
1704 .proc_handler
= proc_do_defense_mode
,
1707 .procname
= "snat_reroute",
1708 .maxlen
= sizeof(int),
1710 .proc_handler
= &proc_dointvec
,
1713 .procname
= "sync_version",
1714 .maxlen
= sizeof(int),
1716 .proc_handler
= &proc_do_sync_mode
,
1719 .procname
= "sync_ports",
1720 .maxlen
= sizeof(int),
1722 .proc_handler
= &proc_do_sync_ports
,
1725 .procname
= "sync_persist_mode",
1726 .maxlen
= sizeof(int),
1728 .proc_handler
= proc_dointvec
,
1731 .procname
= "sync_qlen_max",
1732 .maxlen
= sizeof(unsigned long),
1734 .proc_handler
= proc_doulongvec_minmax
,
1737 .procname
= "sync_sock_size",
1738 .maxlen
= sizeof(int),
1740 .proc_handler
= proc_dointvec
,
1743 .procname
= "cache_bypass",
1744 .maxlen
= sizeof(int),
1746 .proc_handler
= proc_dointvec
,
1749 .procname
= "expire_nodest_conn",
1750 .maxlen
= sizeof(int),
1752 .proc_handler
= proc_dointvec
,
1755 .procname
= "sloppy_tcp",
1756 .maxlen
= sizeof(int),
1758 .proc_handler
= proc_dointvec
,
1761 .procname
= "sloppy_sctp",
1762 .maxlen
= sizeof(int),
1764 .proc_handler
= proc_dointvec
,
1767 .procname
= "expire_quiescent_template",
1768 .maxlen
= sizeof(int),
1770 .proc_handler
= proc_dointvec
,
1773 .procname
= "sync_threshold",
1775 sizeof(((struct netns_ipvs
*)0)->sysctl_sync_threshold
),
1777 .proc_handler
= proc_do_sync_threshold
,
1780 .procname
= "sync_refresh_period",
1781 .maxlen
= sizeof(int),
1783 .proc_handler
= proc_dointvec_jiffies
,
1786 .procname
= "sync_retries",
1787 .maxlen
= sizeof(int),
1789 .proc_handler
= proc_dointvec_minmax
,
1794 .procname
= "nat_icmp_send",
1795 .maxlen
= sizeof(int),
1797 .proc_handler
= proc_dointvec
,
1800 .procname
= "pmtu_disc",
1801 .maxlen
= sizeof(int),
1803 .proc_handler
= proc_dointvec
,
1806 .procname
= "backup_only",
1807 .maxlen
= sizeof(int),
1809 .proc_handler
= proc_dointvec
,
1811 #ifdef CONFIG_IP_VS_DEBUG
1813 .procname
= "debug_level",
1814 .data
= &sysctl_ip_vs_debug_level
,
1815 .maxlen
= sizeof(int),
1817 .proc_handler
= proc_dointvec
,
1825 #ifdef CONFIG_PROC_FS
1828 struct seq_net_private p
; /* Do not move this, netns depends upon it*/
1829 struct hlist_head
*table
;
1834 * Write the contents of the VS rule table to a PROCfs file.
1835 * (It is kept just for backward compatibility)
1837 static inline const char *ip_vs_fwd_name(unsigned int flags
)
1839 switch (flags
& IP_VS_CONN_F_FWD_MASK
) {
1840 case IP_VS_CONN_F_LOCALNODE
:
1842 case IP_VS_CONN_F_TUNNEL
:
1844 case IP_VS_CONN_F_DROUTE
:
1852 /* Get the Nth entry in the two lists */
1853 static struct ip_vs_service
*ip_vs_info_array(struct seq_file
*seq
, loff_t pos
)
1855 struct net
*net
= seq_file_net(seq
);
1856 struct ip_vs_iter
*iter
= seq
->private;
1858 struct ip_vs_service
*svc
;
1860 /* look in hash by protocol */
1861 for (idx
= 0; idx
< IP_VS_SVC_TAB_SIZE
; idx
++) {
1862 hlist_for_each_entry_rcu(svc
, &ip_vs_svc_table
[idx
], s_list
) {
1863 if (net_eq(svc
->net
, net
) && pos
-- == 0) {
1864 iter
->table
= ip_vs_svc_table
;
1871 /* keep looking in fwmark */
1872 for (idx
= 0; idx
< IP_VS_SVC_TAB_SIZE
; idx
++) {
1873 hlist_for_each_entry_rcu(svc
, &ip_vs_svc_fwm_table
[idx
],
1875 if (net_eq(svc
->net
, net
) && pos
-- == 0) {
1876 iter
->table
= ip_vs_svc_fwm_table
;
1886 static void *ip_vs_info_seq_start(struct seq_file
*seq
, loff_t
*pos
)
1890 return *pos
? ip_vs_info_array(seq
, *pos
- 1) : SEQ_START_TOKEN
;
1894 static void *ip_vs_info_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
1896 struct hlist_node
*e
;
1897 struct ip_vs_iter
*iter
;
1898 struct ip_vs_service
*svc
;
1901 if (v
== SEQ_START_TOKEN
)
1902 return ip_vs_info_array(seq
,0);
1905 iter
= seq
->private;
1907 if (iter
->table
== ip_vs_svc_table
) {
1908 /* next service in table hashed by protocol */
1909 e
= rcu_dereference(hlist_next_rcu(&svc
->s_list
));
1911 return hlist_entry(e
, struct ip_vs_service
, s_list
);
1913 while (++iter
->bucket
< IP_VS_SVC_TAB_SIZE
) {
1914 hlist_for_each_entry_rcu(svc
,
1915 &ip_vs_svc_table
[iter
->bucket
],
1921 iter
->table
= ip_vs_svc_fwm_table
;
1926 /* next service in hashed by fwmark */
1927 e
= rcu_dereference(hlist_next_rcu(&svc
->f_list
));
1929 return hlist_entry(e
, struct ip_vs_service
, f_list
);
1932 while (++iter
->bucket
< IP_VS_SVC_TAB_SIZE
) {
1933 hlist_for_each_entry_rcu(svc
,
1934 &ip_vs_svc_fwm_table
[iter
->bucket
],
1942 static void ip_vs_info_seq_stop(struct seq_file
*seq
, void *v
)
1949 static int ip_vs_info_seq_show(struct seq_file
*seq
, void *v
)
1951 if (v
== SEQ_START_TOKEN
) {
1953 "IP Virtual Server version %d.%d.%d (size=%d)\n",
1954 NVERSION(IP_VS_VERSION_CODE
), ip_vs_conn_tab_size
);
1956 "Prot LocalAddress:Port Scheduler Flags\n");
1958 " -> RemoteAddress:Port Forward Weight ActiveConn InActConn\n");
1960 const struct ip_vs_service
*svc
= v
;
1961 const struct ip_vs_iter
*iter
= seq
->private;
1962 const struct ip_vs_dest
*dest
;
1963 struct ip_vs_scheduler
*sched
= rcu_dereference(svc
->scheduler
);
1965 if (iter
->table
== ip_vs_svc_table
) {
1966 #ifdef CONFIG_IP_VS_IPV6
1967 if (svc
->af
== AF_INET6
)
1968 seq_printf(seq
, "%s [%pI6]:%04X %s ",
1969 ip_vs_proto_name(svc
->protocol
),
1975 seq_printf(seq
, "%s %08X:%04X %s %s ",
1976 ip_vs_proto_name(svc
->protocol
),
1977 ntohl(svc
->addr
.ip
),
1980 (svc
->flags
& IP_VS_SVC_F_ONEPACKET
)?"ops ":"");
1982 seq_printf(seq
, "FWM %08X %s %s",
1983 svc
->fwmark
, sched
->name
,
1984 (svc
->flags
& IP_VS_SVC_F_ONEPACKET
)?"ops ":"");
1987 if (svc
->flags
& IP_VS_SVC_F_PERSISTENT
)
1988 seq_printf(seq
, "persistent %d %08X\n",
1990 ntohl(svc
->netmask
));
1992 seq_putc(seq
, '\n');
1994 list_for_each_entry_rcu(dest
, &svc
->destinations
, n_list
) {
1995 #ifdef CONFIG_IP_VS_IPV6
1996 if (dest
->af
== AF_INET6
)
1999 " %-7s %-6d %-10d %-10d\n",
2002 ip_vs_fwd_name(atomic_read(&dest
->conn_flags
)),
2003 atomic_read(&dest
->weight
),
2004 atomic_read(&dest
->activeconns
),
2005 atomic_read(&dest
->inactconns
));
2010 "%-7s %-6d %-10d %-10d\n",
2011 ntohl(dest
->addr
.ip
),
2013 ip_vs_fwd_name(atomic_read(&dest
->conn_flags
)),
2014 atomic_read(&dest
->weight
),
2015 atomic_read(&dest
->activeconns
),
2016 atomic_read(&dest
->inactconns
));
2023 static const struct seq_operations ip_vs_info_seq_ops
= {
2024 .start
= ip_vs_info_seq_start
,
2025 .next
= ip_vs_info_seq_next
,
2026 .stop
= ip_vs_info_seq_stop
,
2027 .show
= ip_vs_info_seq_show
,
2030 static int ip_vs_info_open(struct inode
*inode
, struct file
*file
)
2032 return seq_open_net(inode
, file
, &ip_vs_info_seq_ops
,
2033 sizeof(struct ip_vs_iter
));
2036 static const struct file_operations ip_vs_info_fops
= {
2037 .owner
= THIS_MODULE
,
2038 .open
= ip_vs_info_open
,
2040 .llseek
= seq_lseek
,
2041 .release
= seq_release_net
,
2044 static int ip_vs_stats_show(struct seq_file
*seq
, void *v
)
2046 struct net
*net
= seq_file_single_net(seq
);
2047 struct ip_vs_stats_user show
;
2049 /* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2051 " Total Incoming Outgoing Incoming Outgoing\n");
2053 " Conns Packets Packets Bytes Bytes\n");
2055 ip_vs_copy_stats(&show
, &net_ipvs(net
)->tot_stats
);
2056 seq_printf(seq
, "%8X %8X %8X %16LX %16LX\n\n", show
.conns
,
2057 show
.inpkts
, show
.outpkts
,
2058 (unsigned long long) show
.inbytes
,
2059 (unsigned long long) show
.outbytes
);
2061 /* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2063 " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
2064 seq_printf(seq
, "%8X %8X %8X %16X %16X\n",
2065 show
.cps
, show
.inpps
, show
.outpps
,
2066 show
.inbps
, show
.outbps
);
2071 static int ip_vs_stats_seq_open(struct inode
*inode
, struct file
*file
)
2073 return single_open_net(inode
, file
, ip_vs_stats_show
);
2076 static const struct file_operations ip_vs_stats_fops
= {
2077 .owner
= THIS_MODULE
,
2078 .open
= ip_vs_stats_seq_open
,
2080 .llseek
= seq_lseek
,
2081 .release
= single_release_net
,
2084 static int ip_vs_stats_percpu_show(struct seq_file
*seq
, void *v
)
2086 struct net
*net
= seq_file_single_net(seq
);
2087 struct ip_vs_stats
*tot_stats
= &net_ipvs(net
)->tot_stats
;
2088 struct ip_vs_cpu_stats __percpu
*cpustats
= tot_stats
->cpustats
;
2089 struct ip_vs_stats_user rates
;
2092 /* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2094 " Total Incoming Outgoing Incoming Outgoing\n");
2096 "CPU Conns Packets Packets Bytes Bytes\n");
2098 for_each_possible_cpu(i
) {
2099 struct ip_vs_cpu_stats
*u
= per_cpu_ptr(cpustats
, i
);
2101 __u64 inbytes
, outbytes
;
2104 start
= u64_stats_fetch_begin_irq(&u
->syncp
);
2105 inbytes
= u
->ustats
.inbytes
;
2106 outbytes
= u
->ustats
.outbytes
;
2107 } while (u64_stats_fetch_retry_irq(&u
->syncp
, start
));
2109 seq_printf(seq
, "%3X %8X %8X %8X %16LX %16LX\n",
2110 i
, u
->ustats
.conns
, u
->ustats
.inpkts
,
2111 u
->ustats
.outpkts
, (__u64
)inbytes
,
2115 spin_lock_bh(&tot_stats
->lock
);
2117 seq_printf(seq
, " ~ %8X %8X %8X %16LX %16LX\n\n",
2118 tot_stats
->ustats
.conns
, tot_stats
->ustats
.inpkts
,
2119 tot_stats
->ustats
.outpkts
,
2120 (unsigned long long) tot_stats
->ustats
.inbytes
,
2121 (unsigned long long) tot_stats
->ustats
.outbytes
);
2123 ip_vs_read_estimator(&rates
, tot_stats
);
2125 spin_unlock_bh(&tot_stats
->lock
);
2127 /* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2129 " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
2130 seq_printf(seq
, " %8X %8X %8X %16X %16X\n",
2140 static int ip_vs_stats_percpu_seq_open(struct inode
*inode
, struct file
*file
)
2142 return single_open_net(inode
, file
, ip_vs_stats_percpu_show
);
2145 static const struct file_operations ip_vs_stats_percpu_fops
= {
2146 .owner
= THIS_MODULE
,
2147 .open
= ip_vs_stats_percpu_seq_open
,
2149 .llseek
= seq_lseek
,
2150 .release
= single_release_net
,
2155 * Set timeout values for tcp tcpfin udp in the timeout_table.
2157 static int ip_vs_set_timeout(struct net
*net
, struct ip_vs_timeout_user
*u
)
2159 #if defined(CONFIG_IP_VS_PROTO_TCP) || defined(CONFIG_IP_VS_PROTO_UDP)
2160 struct ip_vs_proto_data
*pd
;
2163 IP_VS_DBG(2, "Setting timeout tcp:%d tcpfin:%d udp:%d\n",
2168 #ifdef CONFIG_IP_VS_PROTO_TCP
2169 if (u
->tcp_timeout
) {
2170 pd
= ip_vs_proto_data_get(net
, IPPROTO_TCP
);
2171 pd
->timeout_table
[IP_VS_TCP_S_ESTABLISHED
]
2172 = u
->tcp_timeout
* HZ
;
2175 if (u
->tcp_fin_timeout
) {
2176 pd
= ip_vs_proto_data_get(net
, IPPROTO_TCP
);
2177 pd
->timeout_table
[IP_VS_TCP_S_FIN_WAIT
]
2178 = u
->tcp_fin_timeout
* HZ
;
2182 #ifdef CONFIG_IP_VS_PROTO_UDP
2183 if (u
->udp_timeout
) {
2184 pd
= ip_vs_proto_data_get(net
, IPPROTO_UDP
);
2185 pd
->timeout_table
[IP_VS_UDP_S_NORMAL
]
2186 = u
->udp_timeout
* HZ
;
2192 #define CMDID(cmd) (cmd - IP_VS_BASE_CTL)
2194 struct ip_vs_svcdest_user
{
2195 struct ip_vs_service_user s
;
2196 struct ip_vs_dest_user d
;
2199 static const unsigned char set_arglen
[CMDID(IP_VS_SO_SET_MAX
) + 1] = {
2200 [CMDID(IP_VS_SO_SET_ADD
)] = sizeof(struct ip_vs_service_user
),
2201 [CMDID(IP_VS_SO_SET_EDIT
)] = sizeof(struct ip_vs_service_user
),
2202 [CMDID(IP_VS_SO_SET_DEL
)] = sizeof(struct ip_vs_service_user
),
2203 [CMDID(IP_VS_SO_SET_ADDDEST
)] = sizeof(struct ip_vs_svcdest_user
),
2204 [CMDID(IP_VS_SO_SET_DELDEST
)] = sizeof(struct ip_vs_svcdest_user
),
2205 [CMDID(IP_VS_SO_SET_EDITDEST
)] = sizeof(struct ip_vs_svcdest_user
),
2206 [CMDID(IP_VS_SO_SET_TIMEOUT
)] = sizeof(struct ip_vs_timeout_user
),
2207 [CMDID(IP_VS_SO_SET_STARTDAEMON
)] = sizeof(struct ip_vs_daemon_user
),
2208 [CMDID(IP_VS_SO_SET_STOPDAEMON
)] = sizeof(struct ip_vs_daemon_user
),
2209 [CMDID(IP_VS_SO_SET_ZERO
)] = sizeof(struct ip_vs_service_user
),
2212 union ip_vs_set_arglen
{
2213 struct ip_vs_service_user field_IP_VS_SO_SET_ADD
;
2214 struct ip_vs_service_user field_IP_VS_SO_SET_EDIT
;
2215 struct ip_vs_service_user field_IP_VS_SO_SET_DEL
;
2216 struct ip_vs_svcdest_user field_IP_VS_SO_SET_ADDDEST
;
2217 struct ip_vs_svcdest_user field_IP_VS_SO_SET_DELDEST
;
2218 struct ip_vs_svcdest_user field_IP_VS_SO_SET_EDITDEST
;
2219 struct ip_vs_timeout_user field_IP_VS_SO_SET_TIMEOUT
;
2220 struct ip_vs_daemon_user field_IP_VS_SO_SET_STARTDAEMON
;
2221 struct ip_vs_daemon_user field_IP_VS_SO_SET_STOPDAEMON
;
2222 struct ip_vs_service_user field_IP_VS_SO_SET_ZERO
;
2225 #define MAX_SET_ARGLEN sizeof(union ip_vs_set_arglen)
2227 static void ip_vs_copy_usvc_compat(struct ip_vs_service_user_kern
*usvc
,
2228 struct ip_vs_service_user
*usvc_compat
)
2230 memset(usvc
, 0, sizeof(*usvc
));
2233 usvc
->protocol
= usvc_compat
->protocol
;
2234 usvc
->addr
.ip
= usvc_compat
->addr
;
2235 usvc
->port
= usvc_compat
->port
;
2236 usvc
->fwmark
= usvc_compat
->fwmark
;
2238 /* Deep copy of sched_name is not needed here */
2239 usvc
->sched_name
= usvc_compat
->sched_name
;
2241 usvc
->flags
= usvc_compat
->flags
;
2242 usvc
->timeout
= usvc_compat
->timeout
;
2243 usvc
->netmask
= usvc_compat
->netmask
;
2246 static void ip_vs_copy_udest_compat(struct ip_vs_dest_user_kern
*udest
,
2247 struct ip_vs_dest_user
*udest_compat
)
2249 memset(udest
, 0, sizeof(*udest
));
2251 udest
->addr
.ip
= udest_compat
->addr
;
2252 udest
->port
= udest_compat
->port
;
2253 udest
->conn_flags
= udest_compat
->conn_flags
;
2254 udest
->weight
= udest_compat
->weight
;
2255 udest
->u_threshold
= udest_compat
->u_threshold
;
2256 udest
->l_threshold
= udest_compat
->l_threshold
;
2257 udest
->af
= AF_INET
;
2261 do_ip_vs_set_ctl(struct sock
*sk
, int cmd
, void __user
*user
, unsigned int len
)
2263 struct net
*net
= sock_net(sk
);
2265 unsigned char arg
[MAX_SET_ARGLEN
];
2266 struct ip_vs_service_user
*usvc_compat
;
2267 struct ip_vs_service_user_kern usvc
;
2268 struct ip_vs_service
*svc
;
2269 struct ip_vs_dest_user
*udest_compat
;
2270 struct ip_vs_dest_user_kern udest
;
2271 struct netns_ipvs
*ipvs
= net_ipvs(net
);
2273 BUILD_BUG_ON(sizeof(arg
) > 255);
2274 if (!ns_capable(sock_net(sk
)->user_ns
, CAP_NET_ADMIN
))
2277 if (cmd
< IP_VS_BASE_CTL
|| cmd
> IP_VS_SO_SET_MAX
)
2279 if (len
!= set_arglen
[CMDID(cmd
)]) {
2280 IP_VS_DBG(1, "set_ctl: len %u != %u\n",
2281 len
, set_arglen
[CMDID(cmd
)]);
2285 if (copy_from_user(arg
, user
, len
) != 0)
2288 /* increase the module use count */
2289 ip_vs_use_count_inc();
2291 /* Handle daemons since they have another lock */
2292 if (cmd
== IP_VS_SO_SET_STARTDAEMON
||
2293 cmd
== IP_VS_SO_SET_STOPDAEMON
) {
2294 struct ip_vs_daemon_user
*dm
= (struct ip_vs_daemon_user
*)arg
;
2296 mutex_lock(&ipvs
->sync_mutex
);
2297 if (cmd
== IP_VS_SO_SET_STARTDAEMON
)
2298 ret
= start_sync_thread(net
, dm
->state
, dm
->mcast_ifn
,
2301 ret
= stop_sync_thread(net
, dm
->state
);
2302 mutex_unlock(&ipvs
->sync_mutex
);
2306 mutex_lock(&__ip_vs_mutex
);
2307 if (cmd
== IP_VS_SO_SET_FLUSH
) {
2308 /* Flush the virtual service */
2309 ret
= ip_vs_flush(net
, false);
2311 } else if (cmd
== IP_VS_SO_SET_TIMEOUT
) {
2312 /* Set timeout values for (tcp tcpfin udp) */
2313 ret
= ip_vs_set_timeout(net
, (struct ip_vs_timeout_user
*)arg
);
2317 usvc_compat
= (struct ip_vs_service_user
*)arg
;
2318 udest_compat
= (struct ip_vs_dest_user
*)(usvc_compat
+ 1);
2320 /* We only use the new structs internally, so copy userspace compat
2321 * structs to extended internal versions */
2322 ip_vs_copy_usvc_compat(&usvc
, usvc_compat
);
2323 ip_vs_copy_udest_compat(&udest
, udest_compat
);
2325 if (cmd
== IP_VS_SO_SET_ZERO
) {
2326 /* if no service address is set, zero counters in all */
2327 if (!usvc
.fwmark
&& !usvc
.addr
.ip
&& !usvc
.port
) {
2328 ret
= ip_vs_zero_all(net
);
2333 /* Check for valid protocol: TCP or UDP or SCTP, even for fwmark!=0 */
2334 if (usvc
.protocol
!= IPPROTO_TCP
&& usvc
.protocol
!= IPPROTO_UDP
&&
2335 usvc
.protocol
!= IPPROTO_SCTP
) {
2336 pr_err("set_ctl: invalid protocol: %d %pI4:%d %s\n",
2337 usvc
.protocol
, &usvc
.addr
.ip
,
2338 ntohs(usvc
.port
), usvc
.sched_name
);
2343 /* Lookup the exact service by <protocol, addr, port> or fwmark */
2345 if (usvc
.fwmark
== 0)
2346 svc
= __ip_vs_service_find(net
, usvc
.af
, usvc
.protocol
,
2347 &usvc
.addr
, usvc
.port
);
2349 svc
= __ip_vs_svc_fwm_find(net
, usvc
.af
, usvc
.fwmark
);
2352 if (cmd
!= IP_VS_SO_SET_ADD
2353 && (svc
== NULL
|| svc
->protocol
!= usvc
.protocol
)) {
2359 case IP_VS_SO_SET_ADD
:
2363 ret
= ip_vs_add_service(net
, &usvc
, &svc
);
2365 case IP_VS_SO_SET_EDIT
:
2366 ret
= ip_vs_edit_service(svc
, &usvc
);
2368 case IP_VS_SO_SET_DEL
:
2369 ret
= ip_vs_del_service(svc
);
2373 case IP_VS_SO_SET_ZERO
:
2374 ret
= ip_vs_zero_service(svc
);
2376 case IP_VS_SO_SET_ADDDEST
:
2377 ret
= ip_vs_add_dest(svc
, &udest
);
2379 case IP_VS_SO_SET_EDITDEST
:
2380 ret
= ip_vs_edit_dest(svc
, &udest
);
2382 case IP_VS_SO_SET_DELDEST
:
2383 ret
= ip_vs_del_dest(svc
, &udest
);
2390 mutex_unlock(&__ip_vs_mutex
);
2392 /* decrease the module use count */
2393 ip_vs_use_count_dec();
2400 ip_vs_copy_service(struct ip_vs_service_entry
*dst
, struct ip_vs_service
*src
)
2402 struct ip_vs_scheduler
*sched
;
2404 sched
= rcu_dereference_protected(src
->scheduler
, 1);
2405 dst
->protocol
= src
->protocol
;
2406 dst
->addr
= src
->addr
.ip
;
2407 dst
->port
= src
->port
;
2408 dst
->fwmark
= src
->fwmark
;
2409 strlcpy(dst
->sched_name
, sched
->name
, sizeof(dst
->sched_name
));
2410 dst
->flags
= src
->flags
;
2411 dst
->timeout
= src
->timeout
/ HZ
;
2412 dst
->netmask
= src
->netmask
;
2413 dst
->num_dests
= src
->num_dests
;
2414 ip_vs_copy_stats(&dst
->stats
, &src
->stats
);
2418 __ip_vs_get_service_entries(struct net
*net
,
2419 const struct ip_vs_get_services
*get
,
2420 struct ip_vs_get_services __user
*uptr
)
2423 struct ip_vs_service
*svc
;
2424 struct ip_vs_service_entry entry
;
2427 for (idx
= 0; idx
< IP_VS_SVC_TAB_SIZE
; idx
++) {
2428 hlist_for_each_entry(svc
, &ip_vs_svc_table
[idx
], s_list
) {
2429 /* Only expose IPv4 entries to old interface */
2430 if (svc
->af
!= AF_INET
|| !net_eq(svc
->net
, net
))
2433 if (count
>= get
->num_services
)
2435 memset(&entry
, 0, sizeof(entry
));
2436 ip_vs_copy_service(&entry
, svc
);
2437 if (copy_to_user(&uptr
->entrytable
[count
],
2438 &entry
, sizeof(entry
))) {
2446 for (idx
= 0; idx
< IP_VS_SVC_TAB_SIZE
; idx
++) {
2447 hlist_for_each_entry(svc
, &ip_vs_svc_fwm_table
[idx
], f_list
) {
2448 /* Only expose IPv4 entries to old interface */
2449 if (svc
->af
!= AF_INET
|| !net_eq(svc
->net
, net
))
2452 if (count
>= get
->num_services
)
2454 memset(&entry
, 0, sizeof(entry
));
2455 ip_vs_copy_service(&entry
, svc
);
2456 if (copy_to_user(&uptr
->entrytable
[count
],
2457 &entry
, sizeof(entry
))) {
2469 __ip_vs_get_dest_entries(struct net
*net
, const struct ip_vs_get_dests
*get
,
2470 struct ip_vs_get_dests __user
*uptr
)
2472 struct ip_vs_service
*svc
;
2473 union nf_inet_addr addr
= { .ip
= get
->addr
};
2478 svc
= __ip_vs_svc_fwm_find(net
, AF_INET
, get
->fwmark
);
2480 svc
= __ip_vs_service_find(net
, AF_INET
, get
->protocol
, &addr
,
2486 struct ip_vs_dest
*dest
;
2487 struct ip_vs_dest_entry entry
;
2489 memset(&entry
, 0, sizeof(entry
));
2490 list_for_each_entry(dest
, &svc
->destinations
, n_list
) {
2491 if (count
>= get
->num_dests
)
2494 /* Cannot expose heterogeneous members via sockopt
2497 if (dest
->af
!= svc
->af
)
2500 entry
.addr
= dest
->addr
.ip
;
2501 entry
.port
= dest
->port
;
2502 entry
.conn_flags
= atomic_read(&dest
->conn_flags
);
2503 entry
.weight
= atomic_read(&dest
->weight
);
2504 entry
.u_threshold
= dest
->u_threshold
;
2505 entry
.l_threshold
= dest
->l_threshold
;
2506 entry
.activeconns
= atomic_read(&dest
->activeconns
);
2507 entry
.inactconns
= atomic_read(&dest
->inactconns
);
2508 entry
.persistconns
= atomic_read(&dest
->persistconns
);
2509 ip_vs_copy_stats(&entry
.stats
, &dest
->stats
);
2510 if (copy_to_user(&uptr
->entrytable
[count
],
2511 &entry
, sizeof(entry
))) {
2523 __ip_vs_get_timeouts(struct net
*net
, struct ip_vs_timeout_user
*u
)
2525 #if defined(CONFIG_IP_VS_PROTO_TCP) || defined(CONFIG_IP_VS_PROTO_UDP)
2526 struct ip_vs_proto_data
*pd
;
2529 memset(u
, 0, sizeof (*u
));
2531 #ifdef CONFIG_IP_VS_PROTO_TCP
2532 pd
= ip_vs_proto_data_get(net
, IPPROTO_TCP
);
2533 u
->tcp_timeout
= pd
->timeout_table
[IP_VS_TCP_S_ESTABLISHED
] / HZ
;
2534 u
->tcp_fin_timeout
= pd
->timeout_table
[IP_VS_TCP_S_FIN_WAIT
] / HZ
;
2536 #ifdef CONFIG_IP_VS_PROTO_UDP
2537 pd
= ip_vs_proto_data_get(net
, IPPROTO_UDP
);
2539 pd
->timeout_table
[IP_VS_UDP_S_NORMAL
] / HZ
;
2543 static const unsigned char get_arglen
[CMDID(IP_VS_SO_GET_MAX
) + 1] = {
2544 [CMDID(IP_VS_SO_GET_VERSION
)] = 64,
2545 [CMDID(IP_VS_SO_GET_INFO
)] = sizeof(struct ip_vs_getinfo
),
2546 [CMDID(IP_VS_SO_GET_SERVICES
)] = sizeof(struct ip_vs_get_services
),
2547 [CMDID(IP_VS_SO_GET_SERVICE
)] = sizeof(struct ip_vs_service_entry
),
2548 [CMDID(IP_VS_SO_GET_DESTS
)] = sizeof(struct ip_vs_get_dests
),
2549 [CMDID(IP_VS_SO_GET_TIMEOUT
)] = sizeof(struct ip_vs_timeout_user
),
2550 [CMDID(IP_VS_SO_GET_DAEMON
)] = 2 * sizeof(struct ip_vs_daemon_user
),
2553 union ip_vs_get_arglen
{
2554 char field_IP_VS_SO_GET_VERSION
[64];
2555 struct ip_vs_getinfo field_IP_VS_SO_GET_INFO
;
2556 struct ip_vs_get_services field_IP_VS_SO_GET_SERVICES
;
2557 struct ip_vs_service_entry field_IP_VS_SO_GET_SERVICE
;
2558 struct ip_vs_get_dests field_IP_VS_SO_GET_DESTS
;
2559 struct ip_vs_timeout_user field_IP_VS_SO_GET_TIMEOUT
;
2560 struct ip_vs_daemon_user field_IP_VS_SO_GET_DAEMON
[2];
2563 #define MAX_GET_ARGLEN sizeof(union ip_vs_get_arglen)
2566 do_ip_vs_get_ctl(struct sock
*sk
, int cmd
, void __user
*user
, int *len
)
2568 unsigned char arg
[MAX_GET_ARGLEN
];
2570 unsigned int copylen
;
2571 struct net
*net
= sock_net(sk
);
2572 struct netns_ipvs
*ipvs
= net_ipvs(net
);
2575 BUILD_BUG_ON(sizeof(arg
) > 255);
2576 if (!ns_capable(sock_net(sk
)->user_ns
, CAP_NET_ADMIN
))
2579 if (cmd
< IP_VS_BASE_CTL
|| cmd
> IP_VS_SO_GET_MAX
)
2582 copylen
= get_arglen
[CMDID(cmd
)];
2583 if (*len
< (int) copylen
) {
2584 IP_VS_DBG(1, "get_ctl: len %d < %u\n", *len
, copylen
);
2588 if (copy_from_user(arg
, user
, copylen
) != 0)
2591 * Handle daemons first since it has its own locking
2593 if (cmd
== IP_VS_SO_GET_DAEMON
) {
2594 struct ip_vs_daemon_user d
[2];
2596 memset(&d
, 0, sizeof(d
));
2597 mutex_lock(&ipvs
->sync_mutex
);
2598 if (ipvs
->sync_state
& IP_VS_STATE_MASTER
) {
2599 d
[0].state
= IP_VS_STATE_MASTER
;
2600 strlcpy(d
[0].mcast_ifn
, ipvs
->master_mcast_ifn
,
2601 sizeof(d
[0].mcast_ifn
));
2602 d
[0].syncid
= ipvs
->master_syncid
;
2604 if (ipvs
->sync_state
& IP_VS_STATE_BACKUP
) {
2605 d
[1].state
= IP_VS_STATE_BACKUP
;
2606 strlcpy(d
[1].mcast_ifn
, ipvs
->backup_mcast_ifn
,
2607 sizeof(d
[1].mcast_ifn
));
2608 d
[1].syncid
= ipvs
->backup_syncid
;
2610 if (copy_to_user(user
, &d
, sizeof(d
)) != 0)
2612 mutex_unlock(&ipvs
->sync_mutex
);
2616 mutex_lock(&__ip_vs_mutex
);
2618 case IP_VS_SO_GET_VERSION
:
2622 sprintf(buf
, "IP Virtual Server version %d.%d.%d (size=%d)",
2623 NVERSION(IP_VS_VERSION_CODE
), ip_vs_conn_tab_size
);
2624 if (copy_to_user(user
, buf
, strlen(buf
)+1) != 0) {
2628 *len
= strlen(buf
)+1;
2632 case IP_VS_SO_GET_INFO
:
2634 struct ip_vs_getinfo info
;
2635 info
.version
= IP_VS_VERSION_CODE
;
2636 info
.size
= ip_vs_conn_tab_size
;
2637 info
.num_services
= ipvs
->num_services
;
2638 if (copy_to_user(user
, &info
, sizeof(info
)) != 0)
2643 case IP_VS_SO_GET_SERVICES
:
2645 struct ip_vs_get_services
*get
;
2648 get
= (struct ip_vs_get_services
*)arg
;
2649 size
= sizeof(*get
) +
2650 sizeof(struct ip_vs_service_entry
) * get
->num_services
;
2652 pr_err("length: %u != %u\n", *len
, size
);
2656 ret
= __ip_vs_get_service_entries(net
, get
, user
);
2660 case IP_VS_SO_GET_SERVICE
:
2662 struct ip_vs_service_entry
*entry
;
2663 struct ip_vs_service
*svc
;
2664 union nf_inet_addr addr
;
2666 entry
= (struct ip_vs_service_entry
*)arg
;
2667 addr
.ip
= entry
->addr
;
2670 svc
= __ip_vs_svc_fwm_find(net
, AF_INET
, entry
->fwmark
);
2672 svc
= __ip_vs_service_find(net
, AF_INET
,
2673 entry
->protocol
, &addr
,
2677 ip_vs_copy_service(entry
, svc
);
2678 if (copy_to_user(user
, entry
, sizeof(*entry
)) != 0)
2685 case IP_VS_SO_GET_DESTS
:
2687 struct ip_vs_get_dests
*get
;
2690 get
= (struct ip_vs_get_dests
*)arg
;
2691 size
= sizeof(*get
) +
2692 sizeof(struct ip_vs_dest_entry
) * get
->num_dests
;
2694 pr_err("length: %u != %u\n", *len
, size
);
2698 ret
= __ip_vs_get_dest_entries(net
, get
, user
);
2702 case IP_VS_SO_GET_TIMEOUT
:
2704 struct ip_vs_timeout_user t
;
2706 __ip_vs_get_timeouts(net
, &t
);
2707 if (copy_to_user(user
, &t
, sizeof(t
)) != 0)
2717 mutex_unlock(&__ip_vs_mutex
);
2722 static struct nf_sockopt_ops ip_vs_sockopts
= {
2724 .set_optmin
= IP_VS_BASE_CTL
,
2725 .set_optmax
= IP_VS_SO_SET_MAX
+1,
2726 .set
= do_ip_vs_set_ctl
,
2727 .get_optmin
= IP_VS_BASE_CTL
,
2728 .get_optmax
= IP_VS_SO_GET_MAX
+1,
2729 .get
= do_ip_vs_get_ctl
,
2730 .owner
= THIS_MODULE
,
2734 * Generic Netlink interface
2737 /* IPVS genetlink family */
2738 static struct genl_family ip_vs_genl_family
= {
2739 .id
= GENL_ID_GENERATE
,
2741 .name
= IPVS_GENL_NAME
,
2742 .version
= IPVS_GENL_VERSION
,
2743 .maxattr
= IPVS_CMD_MAX
,
2744 .netnsok
= true, /* Make ipvsadm to work on netns */
2747 /* Policy used for first-level command attributes */
2748 static const struct nla_policy ip_vs_cmd_policy
[IPVS_CMD_ATTR_MAX
+ 1] = {
2749 [IPVS_CMD_ATTR_SERVICE
] = { .type
= NLA_NESTED
},
2750 [IPVS_CMD_ATTR_DEST
] = { .type
= NLA_NESTED
},
2751 [IPVS_CMD_ATTR_DAEMON
] = { .type
= NLA_NESTED
},
2752 [IPVS_CMD_ATTR_TIMEOUT_TCP
] = { .type
= NLA_U32
},
2753 [IPVS_CMD_ATTR_TIMEOUT_TCP_FIN
] = { .type
= NLA_U32
},
2754 [IPVS_CMD_ATTR_TIMEOUT_UDP
] = { .type
= NLA_U32
},
2757 /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DAEMON */
2758 static const struct nla_policy ip_vs_daemon_policy
[IPVS_DAEMON_ATTR_MAX
+ 1] = {
2759 [IPVS_DAEMON_ATTR_STATE
] = { .type
= NLA_U32
},
2760 [IPVS_DAEMON_ATTR_MCAST_IFN
] = { .type
= NLA_NUL_STRING
,
2761 .len
= IP_VS_IFNAME_MAXLEN
},
2762 [IPVS_DAEMON_ATTR_SYNC_ID
] = { .type
= NLA_U32
},
2765 /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_SERVICE */
2766 static const struct nla_policy ip_vs_svc_policy
[IPVS_SVC_ATTR_MAX
+ 1] = {
2767 [IPVS_SVC_ATTR_AF
] = { .type
= NLA_U16
},
2768 [IPVS_SVC_ATTR_PROTOCOL
] = { .type
= NLA_U16
},
2769 [IPVS_SVC_ATTR_ADDR
] = { .type
= NLA_BINARY
,
2770 .len
= sizeof(union nf_inet_addr
) },
2771 [IPVS_SVC_ATTR_PORT
] = { .type
= NLA_U16
},
2772 [IPVS_SVC_ATTR_FWMARK
] = { .type
= NLA_U32
},
2773 [IPVS_SVC_ATTR_SCHED_NAME
] = { .type
= NLA_NUL_STRING
,
2774 .len
= IP_VS_SCHEDNAME_MAXLEN
},
2775 [IPVS_SVC_ATTR_PE_NAME
] = { .type
= NLA_NUL_STRING
,
2776 .len
= IP_VS_PENAME_MAXLEN
},
2777 [IPVS_SVC_ATTR_FLAGS
] = { .type
= NLA_BINARY
,
2778 .len
= sizeof(struct ip_vs_flags
) },
2779 [IPVS_SVC_ATTR_TIMEOUT
] = { .type
= NLA_U32
},
2780 [IPVS_SVC_ATTR_NETMASK
] = { .type
= NLA_U32
},
2781 [IPVS_SVC_ATTR_STATS
] = { .type
= NLA_NESTED
},
2784 /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DEST */
2785 static const struct nla_policy ip_vs_dest_policy
[IPVS_DEST_ATTR_MAX
+ 1] = {
2786 [IPVS_DEST_ATTR_ADDR
] = { .type
= NLA_BINARY
,
2787 .len
= sizeof(union nf_inet_addr
) },
2788 [IPVS_DEST_ATTR_PORT
] = { .type
= NLA_U16
},
2789 [IPVS_DEST_ATTR_FWD_METHOD
] = { .type
= NLA_U32
},
2790 [IPVS_DEST_ATTR_WEIGHT
] = { .type
= NLA_U32
},
2791 [IPVS_DEST_ATTR_U_THRESH
] = { .type
= NLA_U32
},
2792 [IPVS_DEST_ATTR_L_THRESH
] = { .type
= NLA_U32
},
2793 [IPVS_DEST_ATTR_ACTIVE_CONNS
] = { .type
= NLA_U32
},
2794 [IPVS_DEST_ATTR_INACT_CONNS
] = { .type
= NLA_U32
},
2795 [IPVS_DEST_ATTR_PERSIST_CONNS
] = { .type
= NLA_U32
},
2796 [IPVS_DEST_ATTR_STATS
] = { .type
= NLA_NESTED
},
2797 [IPVS_DEST_ATTR_ADDR_FAMILY
] = { .type
= NLA_U16
},
2800 static int ip_vs_genl_fill_stats(struct sk_buff
*skb
, int container_type
,
2801 struct ip_vs_stats
*stats
)
2803 struct ip_vs_stats_user ustats
;
2804 struct nlattr
*nl_stats
= nla_nest_start(skb
, container_type
);
2808 ip_vs_copy_stats(&ustats
, stats
);
2810 if (nla_put_u32(skb
, IPVS_STATS_ATTR_CONNS
, ustats
.conns
) ||
2811 nla_put_u32(skb
, IPVS_STATS_ATTR_INPKTS
, ustats
.inpkts
) ||
2812 nla_put_u32(skb
, IPVS_STATS_ATTR_OUTPKTS
, ustats
.outpkts
) ||
2813 nla_put_u64(skb
, IPVS_STATS_ATTR_INBYTES
, ustats
.inbytes
) ||
2814 nla_put_u64(skb
, IPVS_STATS_ATTR_OUTBYTES
, ustats
.outbytes
) ||
2815 nla_put_u32(skb
, IPVS_STATS_ATTR_CPS
, ustats
.cps
) ||
2816 nla_put_u32(skb
, IPVS_STATS_ATTR_INPPS
, ustats
.inpps
) ||
2817 nla_put_u32(skb
, IPVS_STATS_ATTR_OUTPPS
, ustats
.outpps
) ||
2818 nla_put_u32(skb
, IPVS_STATS_ATTR_INBPS
, ustats
.inbps
) ||
2819 nla_put_u32(skb
, IPVS_STATS_ATTR_OUTBPS
, ustats
.outbps
))
2820 goto nla_put_failure
;
2821 nla_nest_end(skb
, nl_stats
);
2826 nla_nest_cancel(skb
, nl_stats
);
2830 static int ip_vs_genl_fill_service(struct sk_buff
*skb
,
2831 struct ip_vs_service
*svc
)
2833 struct ip_vs_scheduler
*sched
;
2834 struct ip_vs_pe
*pe
;
2835 struct nlattr
*nl_service
;
2836 struct ip_vs_flags flags
= { .flags
= svc
->flags
,
2839 nl_service
= nla_nest_start(skb
, IPVS_CMD_ATTR_SERVICE
);
2843 if (nla_put_u16(skb
, IPVS_SVC_ATTR_AF
, svc
->af
))
2844 goto nla_put_failure
;
2846 if (nla_put_u32(skb
, IPVS_SVC_ATTR_FWMARK
, svc
->fwmark
))
2847 goto nla_put_failure
;
2849 if (nla_put_u16(skb
, IPVS_SVC_ATTR_PROTOCOL
, svc
->protocol
) ||
2850 nla_put(skb
, IPVS_SVC_ATTR_ADDR
, sizeof(svc
->addr
), &svc
->addr
) ||
2851 nla_put_be16(skb
, IPVS_SVC_ATTR_PORT
, svc
->port
))
2852 goto nla_put_failure
;
2855 sched
= rcu_dereference_protected(svc
->scheduler
, 1);
2856 pe
= rcu_dereference_protected(svc
->pe
, 1);
2857 if (nla_put_string(skb
, IPVS_SVC_ATTR_SCHED_NAME
, sched
->name
) ||
2858 (pe
&& nla_put_string(skb
, IPVS_SVC_ATTR_PE_NAME
, pe
->name
)) ||
2859 nla_put(skb
, IPVS_SVC_ATTR_FLAGS
, sizeof(flags
), &flags
) ||
2860 nla_put_u32(skb
, IPVS_SVC_ATTR_TIMEOUT
, svc
->timeout
/ HZ
) ||
2861 nla_put_be32(skb
, IPVS_SVC_ATTR_NETMASK
, svc
->netmask
))
2862 goto nla_put_failure
;
2863 if (ip_vs_genl_fill_stats(skb
, IPVS_SVC_ATTR_STATS
, &svc
->stats
))
2864 goto nla_put_failure
;
2866 nla_nest_end(skb
, nl_service
);
2871 nla_nest_cancel(skb
, nl_service
);
2875 static int ip_vs_genl_dump_service(struct sk_buff
*skb
,
2876 struct ip_vs_service
*svc
,
2877 struct netlink_callback
*cb
)
2881 hdr
= genlmsg_put(skb
, NETLINK_CB(cb
->skb
).portid
, cb
->nlh
->nlmsg_seq
,
2882 &ip_vs_genl_family
, NLM_F_MULTI
,
2883 IPVS_CMD_NEW_SERVICE
);
2887 if (ip_vs_genl_fill_service(skb
, svc
) < 0)
2888 goto nla_put_failure
;
2890 genlmsg_end(skb
, hdr
);
2894 genlmsg_cancel(skb
, hdr
);
2898 static int ip_vs_genl_dump_services(struct sk_buff
*skb
,
2899 struct netlink_callback
*cb
)
2902 int start
= cb
->args
[0];
2903 struct ip_vs_service
*svc
;
2904 struct net
*net
= skb_sknet(skb
);
2906 mutex_lock(&__ip_vs_mutex
);
2907 for (i
= 0; i
< IP_VS_SVC_TAB_SIZE
; i
++) {
2908 hlist_for_each_entry(svc
, &ip_vs_svc_table
[i
], s_list
) {
2909 if (++idx
<= start
|| !net_eq(svc
->net
, net
))
2911 if (ip_vs_genl_dump_service(skb
, svc
, cb
) < 0) {
2913 goto nla_put_failure
;
2918 for (i
= 0; i
< IP_VS_SVC_TAB_SIZE
; i
++) {
2919 hlist_for_each_entry(svc
, &ip_vs_svc_fwm_table
[i
], f_list
) {
2920 if (++idx
<= start
|| !net_eq(svc
->net
, net
))
2922 if (ip_vs_genl_dump_service(skb
, svc
, cb
) < 0) {
2924 goto nla_put_failure
;
2930 mutex_unlock(&__ip_vs_mutex
);
2936 static int ip_vs_genl_parse_service(struct net
*net
,
2937 struct ip_vs_service_user_kern
*usvc
,
2938 struct nlattr
*nla
, int full_entry
,
2939 struct ip_vs_service
**ret_svc
)
2941 struct nlattr
*attrs
[IPVS_SVC_ATTR_MAX
+ 1];
2942 struct nlattr
*nla_af
, *nla_port
, *nla_fwmark
, *nla_protocol
, *nla_addr
;
2943 struct ip_vs_service
*svc
;
2945 /* Parse mandatory identifying service fields first */
2947 nla_parse_nested(attrs
, IPVS_SVC_ATTR_MAX
, nla
, ip_vs_svc_policy
))
2950 nla_af
= attrs
[IPVS_SVC_ATTR_AF
];
2951 nla_protocol
= attrs
[IPVS_SVC_ATTR_PROTOCOL
];
2952 nla_addr
= attrs
[IPVS_SVC_ATTR_ADDR
];
2953 nla_port
= attrs
[IPVS_SVC_ATTR_PORT
];
2954 nla_fwmark
= attrs
[IPVS_SVC_ATTR_FWMARK
];
2956 if (!(nla_af
&& (nla_fwmark
|| (nla_port
&& nla_protocol
&& nla_addr
))))
2959 memset(usvc
, 0, sizeof(*usvc
));
2961 usvc
->af
= nla_get_u16(nla_af
);
2962 #ifdef CONFIG_IP_VS_IPV6
2963 if (usvc
->af
!= AF_INET
&& usvc
->af
!= AF_INET6
)
2965 if (usvc
->af
!= AF_INET
)
2967 return -EAFNOSUPPORT
;
2970 usvc
->protocol
= IPPROTO_TCP
;
2971 usvc
->fwmark
= nla_get_u32(nla_fwmark
);
2973 usvc
->protocol
= nla_get_u16(nla_protocol
);
2974 nla_memcpy(&usvc
->addr
, nla_addr
, sizeof(usvc
->addr
));
2975 usvc
->port
= nla_get_be16(nla_port
);
2981 svc
= __ip_vs_svc_fwm_find(net
, usvc
->af
, usvc
->fwmark
);
2983 svc
= __ip_vs_service_find(net
, usvc
->af
, usvc
->protocol
,
2984 &usvc
->addr
, usvc
->port
);
2988 /* If a full entry was requested, check for the additional fields */
2990 struct nlattr
*nla_sched
, *nla_flags
, *nla_pe
, *nla_timeout
,
2992 struct ip_vs_flags flags
;
2994 nla_sched
= attrs
[IPVS_SVC_ATTR_SCHED_NAME
];
2995 nla_pe
= attrs
[IPVS_SVC_ATTR_PE_NAME
];
2996 nla_flags
= attrs
[IPVS_SVC_ATTR_FLAGS
];
2997 nla_timeout
= attrs
[IPVS_SVC_ATTR_TIMEOUT
];
2998 nla_netmask
= attrs
[IPVS_SVC_ATTR_NETMASK
];
3000 if (!(nla_sched
&& nla_flags
&& nla_timeout
&& nla_netmask
))
3003 nla_memcpy(&flags
, nla_flags
, sizeof(flags
));
3005 /* prefill flags from service if it already exists */
3007 usvc
->flags
= svc
->flags
;
3009 /* set new flags from userland */
3010 usvc
->flags
= (usvc
->flags
& ~flags
.mask
) |
3011 (flags
.flags
& flags
.mask
);
3012 usvc
->sched_name
= nla_data(nla_sched
);
3013 usvc
->pe_name
= nla_pe
? nla_data(nla_pe
) : NULL
;
3014 usvc
->timeout
= nla_get_u32(nla_timeout
);
3015 usvc
->netmask
= nla_get_be32(nla_netmask
);
3021 static struct ip_vs_service
*ip_vs_genl_find_service(struct net
*net
,
3024 struct ip_vs_service_user_kern usvc
;
3025 struct ip_vs_service
*svc
;
3028 ret
= ip_vs_genl_parse_service(net
, &usvc
, nla
, 0, &svc
);
3029 return ret
? ERR_PTR(ret
) : svc
;
3032 static int ip_vs_genl_fill_dest(struct sk_buff
*skb
, struct ip_vs_dest
*dest
)
3034 struct nlattr
*nl_dest
;
3036 nl_dest
= nla_nest_start(skb
, IPVS_CMD_ATTR_DEST
);
3040 if (nla_put(skb
, IPVS_DEST_ATTR_ADDR
, sizeof(dest
->addr
), &dest
->addr
) ||
3041 nla_put_be16(skb
, IPVS_DEST_ATTR_PORT
, dest
->port
) ||
3042 nla_put_u32(skb
, IPVS_DEST_ATTR_FWD_METHOD
,
3043 (atomic_read(&dest
->conn_flags
) &
3044 IP_VS_CONN_F_FWD_MASK
)) ||
3045 nla_put_u32(skb
, IPVS_DEST_ATTR_WEIGHT
,
3046 atomic_read(&dest
->weight
)) ||
3047 nla_put_u32(skb
, IPVS_DEST_ATTR_U_THRESH
, dest
->u_threshold
) ||
3048 nla_put_u32(skb
, IPVS_DEST_ATTR_L_THRESH
, dest
->l_threshold
) ||
3049 nla_put_u32(skb
, IPVS_DEST_ATTR_ACTIVE_CONNS
,
3050 atomic_read(&dest
->activeconns
)) ||
3051 nla_put_u32(skb
, IPVS_DEST_ATTR_INACT_CONNS
,
3052 atomic_read(&dest
->inactconns
)) ||
3053 nla_put_u32(skb
, IPVS_DEST_ATTR_PERSIST_CONNS
,
3054 atomic_read(&dest
->persistconns
)) ||
3055 nla_put_u16(skb
, IPVS_DEST_ATTR_ADDR_FAMILY
, dest
->af
))
3056 goto nla_put_failure
;
3057 if (ip_vs_genl_fill_stats(skb
, IPVS_DEST_ATTR_STATS
, &dest
->stats
))
3058 goto nla_put_failure
;
3060 nla_nest_end(skb
, nl_dest
);
3065 nla_nest_cancel(skb
, nl_dest
);
3069 static int ip_vs_genl_dump_dest(struct sk_buff
*skb
, struct ip_vs_dest
*dest
,
3070 struct netlink_callback
*cb
)
3074 hdr
= genlmsg_put(skb
, NETLINK_CB(cb
->skb
).portid
, cb
->nlh
->nlmsg_seq
,
3075 &ip_vs_genl_family
, NLM_F_MULTI
,
3080 if (ip_vs_genl_fill_dest(skb
, dest
) < 0)
3081 goto nla_put_failure
;
3083 genlmsg_end(skb
, hdr
);
3087 genlmsg_cancel(skb
, hdr
);
3091 static int ip_vs_genl_dump_dests(struct sk_buff
*skb
,
3092 struct netlink_callback
*cb
)
3095 int start
= cb
->args
[0];
3096 struct ip_vs_service
*svc
;
3097 struct ip_vs_dest
*dest
;
3098 struct nlattr
*attrs
[IPVS_CMD_ATTR_MAX
+ 1];
3099 struct net
*net
= skb_sknet(skb
);
3101 mutex_lock(&__ip_vs_mutex
);
3103 /* Try to find the service for which to dump destinations */
3104 if (nlmsg_parse(cb
->nlh
, GENL_HDRLEN
, attrs
,
3105 IPVS_CMD_ATTR_MAX
, ip_vs_cmd_policy
))
3109 svc
= ip_vs_genl_find_service(net
, attrs
[IPVS_CMD_ATTR_SERVICE
]);
3110 if (IS_ERR(svc
) || svc
== NULL
)
3113 /* Dump the destinations */
3114 list_for_each_entry(dest
, &svc
->destinations
, n_list
) {
3117 if (ip_vs_genl_dump_dest(skb
, dest
, cb
) < 0) {
3119 goto nla_put_failure
;
3127 mutex_unlock(&__ip_vs_mutex
);
3132 static int ip_vs_genl_parse_dest(struct ip_vs_dest_user_kern
*udest
,
3133 struct nlattr
*nla
, int full_entry
)
3135 struct nlattr
*attrs
[IPVS_DEST_ATTR_MAX
+ 1];
3136 struct nlattr
*nla_addr
, *nla_port
;
3137 struct nlattr
*nla_addr_family
;
3139 /* Parse mandatory identifying destination fields first */
3141 nla_parse_nested(attrs
, IPVS_DEST_ATTR_MAX
, nla
, ip_vs_dest_policy
))
3144 nla_addr
= attrs
[IPVS_DEST_ATTR_ADDR
];
3145 nla_port
= attrs
[IPVS_DEST_ATTR_PORT
];
3146 nla_addr_family
= attrs
[IPVS_DEST_ATTR_ADDR_FAMILY
];
3148 if (!(nla_addr
&& nla_port
))
3151 memset(udest
, 0, sizeof(*udest
));
3153 nla_memcpy(&udest
->addr
, nla_addr
, sizeof(udest
->addr
));
3154 udest
->port
= nla_get_be16(nla_port
);
3156 if (nla_addr_family
)
3157 udest
->af
= nla_get_u16(nla_addr_family
);
3161 /* If a full entry was requested, check for the additional fields */
3163 struct nlattr
*nla_fwd
, *nla_weight
, *nla_u_thresh
,
3166 nla_fwd
= attrs
[IPVS_DEST_ATTR_FWD_METHOD
];
3167 nla_weight
= attrs
[IPVS_DEST_ATTR_WEIGHT
];
3168 nla_u_thresh
= attrs
[IPVS_DEST_ATTR_U_THRESH
];
3169 nla_l_thresh
= attrs
[IPVS_DEST_ATTR_L_THRESH
];
3171 if (!(nla_fwd
&& nla_weight
&& nla_u_thresh
&& nla_l_thresh
))
3174 udest
->conn_flags
= nla_get_u32(nla_fwd
)
3175 & IP_VS_CONN_F_FWD_MASK
;
3176 udest
->weight
= nla_get_u32(nla_weight
);
3177 udest
->u_threshold
= nla_get_u32(nla_u_thresh
);
3178 udest
->l_threshold
= nla_get_u32(nla_l_thresh
);
3184 static int ip_vs_genl_fill_daemon(struct sk_buff
*skb
, __u32 state
,
3185 const char *mcast_ifn
, __u32 syncid
)
3187 struct nlattr
*nl_daemon
;
3189 nl_daemon
= nla_nest_start(skb
, IPVS_CMD_ATTR_DAEMON
);
3193 if (nla_put_u32(skb
, IPVS_DAEMON_ATTR_STATE
, state
) ||
3194 nla_put_string(skb
, IPVS_DAEMON_ATTR_MCAST_IFN
, mcast_ifn
) ||
3195 nla_put_u32(skb
, IPVS_DAEMON_ATTR_SYNC_ID
, syncid
))
3196 goto nla_put_failure
;
3197 nla_nest_end(skb
, nl_daemon
);
3202 nla_nest_cancel(skb
, nl_daemon
);
3206 static int ip_vs_genl_dump_daemon(struct sk_buff
*skb
, __u32 state
,
3207 const char *mcast_ifn
, __u32 syncid
,
3208 struct netlink_callback
*cb
)
3211 hdr
= genlmsg_put(skb
, NETLINK_CB(cb
->skb
).portid
, cb
->nlh
->nlmsg_seq
,
3212 &ip_vs_genl_family
, NLM_F_MULTI
,
3213 IPVS_CMD_NEW_DAEMON
);
3217 if (ip_vs_genl_fill_daemon(skb
, state
, mcast_ifn
, syncid
))
3218 goto nla_put_failure
;
3220 genlmsg_end(skb
, hdr
);
3224 genlmsg_cancel(skb
, hdr
);
3228 static int ip_vs_genl_dump_daemons(struct sk_buff
*skb
,
3229 struct netlink_callback
*cb
)
3231 struct net
*net
= skb_sknet(skb
);
3232 struct netns_ipvs
*ipvs
= net_ipvs(net
);
3234 mutex_lock(&ipvs
->sync_mutex
);
3235 if ((ipvs
->sync_state
& IP_VS_STATE_MASTER
) && !cb
->args
[0]) {
3236 if (ip_vs_genl_dump_daemon(skb
, IP_VS_STATE_MASTER
,
3237 ipvs
->master_mcast_ifn
,
3238 ipvs
->master_syncid
, cb
) < 0)
3239 goto nla_put_failure
;
3244 if ((ipvs
->sync_state
& IP_VS_STATE_BACKUP
) && !cb
->args
[1]) {
3245 if (ip_vs_genl_dump_daemon(skb
, IP_VS_STATE_BACKUP
,
3246 ipvs
->backup_mcast_ifn
,
3247 ipvs
->backup_syncid
, cb
) < 0)
3248 goto nla_put_failure
;
3254 mutex_unlock(&ipvs
->sync_mutex
);
3259 static int ip_vs_genl_new_daemon(struct net
*net
, struct nlattr
**attrs
)
3261 if (!(attrs
[IPVS_DAEMON_ATTR_STATE
] &&
3262 attrs
[IPVS_DAEMON_ATTR_MCAST_IFN
] &&
3263 attrs
[IPVS_DAEMON_ATTR_SYNC_ID
]))
3266 /* The synchronization protocol is incompatible with mixed family
3269 if (net_ipvs(net
)->mixed_address_family_dests
> 0)
3272 return start_sync_thread(net
,
3273 nla_get_u32(attrs
[IPVS_DAEMON_ATTR_STATE
]),
3274 nla_data(attrs
[IPVS_DAEMON_ATTR_MCAST_IFN
]),
3275 nla_get_u32(attrs
[IPVS_DAEMON_ATTR_SYNC_ID
]));
3278 static int ip_vs_genl_del_daemon(struct net
*net
, struct nlattr
**attrs
)
3280 if (!attrs
[IPVS_DAEMON_ATTR_STATE
])
3283 return stop_sync_thread(net
,
3284 nla_get_u32(attrs
[IPVS_DAEMON_ATTR_STATE
]));
3287 static int ip_vs_genl_set_config(struct net
*net
, struct nlattr
**attrs
)
3289 struct ip_vs_timeout_user t
;
3291 __ip_vs_get_timeouts(net
, &t
);
3293 if (attrs
[IPVS_CMD_ATTR_TIMEOUT_TCP
])
3294 t
.tcp_timeout
= nla_get_u32(attrs
[IPVS_CMD_ATTR_TIMEOUT_TCP
]);
3296 if (attrs
[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN
])
3298 nla_get_u32(attrs
[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN
]);
3300 if (attrs
[IPVS_CMD_ATTR_TIMEOUT_UDP
])
3301 t
.udp_timeout
= nla_get_u32(attrs
[IPVS_CMD_ATTR_TIMEOUT_UDP
]);
3303 return ip_vs_set_timeout(net
, &t
);
3306 static int ip_vs_genl_set_daemon(struct sk_buff
*skb
, struct genl_info
*info
)
3310 struct netns_ipvs
*ipvs
;
3312 net
= skb_sknet(skb
);
3313 ipvs
= net_ipvs(net
);
3314 cmd
= info
->genlhdr
->cmd
;
3316 if (cmd
== IPVS_CMD_NEW_DAEMON
|| cmd
== IPVS_CMD_DEL_DAEMON
) {
3317 struct nlattr
*daemon_attrs
[IPVS_DAEMON_ATTR_MAX
+ 1];
3319 mutex_lock(&ipvs
->sync_mutex
);
3320 if (!info
->attrs
[IPVS_CMD_ATTR_DAEMON
] ||
3321 nla_parse_nested(daemon_attrs
, IPVS_DAEMON_ATTR_MAX
,
3322 info
->attrs
[IPVS_CMD_ATTR_DAEMON
],
3323 ip_vs_daemon_policy
)) {
3328 if (cmd
== IPVS_CMD_NEW_DAEMON
)
3329 ret
= ip_vs_genl_new_daemon(net
, daemon_attrs
);
3331 ret
= ip_vs_genl_del_daemon(net
, daemon_attrs
);
3333 mutex_unlock(&ipvs
->sync_mutex
);
3338 static int ip_vs_genl_set_cmd(struct sk_buff
*skb
, struct genl_info
*info
)
3340 struct ip_vs_service
*svc
= NULL
;
3341 struct ip_vs_service_user_kern usvc
;
3342 struct ip_vs_dest_user_kern udest
;
3344 int need_full_svc
= 0, need_full_dest
= 0;
3347 net
= skb_sknet(skb
);
3348 cmd
= info
->genlhdr
->cmd
;
3350 mutex_lock(&__ip_vs_mutex
);
3352 if (cmd
== IPVS_CMD_FLUSH
) {
3353 ret
= ip_vs_flush(net
, false);
3355 } else if (cmd
== IPVS_CMD_SET_CONFIG
) {
3356 ret
= ip_vs_genl_set_config(net
, info
->attrs
);
3358 } else if (cmd
== IPVS_CMD_ZERO
&&
3359 !info
->attrs
[IPVS_CMD_ATTR_SERVICE
]) {
3360 ret
= ip_vs_zero_all(net
);
3364 /* All following commands require a service argument, so check if we
3365 * received a valid one. We need a full service specification when
3366 * adding / editing a service. Only identifying members otherwise. */
3367 if (cmd
== IPVS_CMD_NEW_SERVICE
|| cmd
== IPVS_CMD_SET_SERVICE
)
3370 ret
= ip_vs_genl_parse_service(net
, &usvc
,
3371 info
->attrs
[IPVS_CMD_ATTR_SERVICE
],
3372 need_full_svc
, &svc
);
3376 /* Unless we're adding a new service, the service must already exist */
3377 if ((cmd
!= IPVS_CMD_NEW_SERVICE
) && (svc
== NULL
)) {
3382 /* Destination commands require a valid destination argument. For
3383 * adding / editing a destination, we need a full destination
3385 if (cmd
== IPVS_CMD_NEW_DEST
|| cmd
== IPVS_CMD_SET_DEST
||
3386 cmd
== IPVS_CMD_DEL_DEST
) {
3387 if (cmd
!= IPVS_CMD_DEL_DEST
)
3390 ret
= ip_vs_genl_parse_dest(&udest
,
3391 info
->attrs
[IPVS_CMD_ATTR_DEST
],
3396 /* Old protocols did not allow the user to specify address
3397 * family, so we set it to zero instead. We also didn't
3398 * allow heterogeneous pools in the old code, so it's safe
3399 * to assume that this will have the same address family as
3405 if (udest
.af
!= svc
->af
&& cmd
!= IPVS_CMD_DEL_DEST
) {
3406 /* The synchronization protocol is incompatible
3407 * with mixed family services
3409 if (net_ipvs(net
)->sync_state
) {
3414 /* Which connection types do we support? */
3415 switch (udest
.conn_flags
) {
3416 case IP_VS_CONN_F_TUNNEL
:
3417 /* We are able to forward this */
3427 case IPVS_CMD_NEW_SERVICE
:
3429 ret
= ip_vs_add_service(net
, &usvc
, &svc
);
3433 case IPVS_CMD_SET_SERVICE
:
3434 ret
= ip_vs_edit_service(svc
, &usvc
);
3436 case IPVS_CMD_DEL_SERVICE
:
3437 ret
= ip_vs_del_service(svc
);
3438 /* do not use svc, it can be freed */
3440 case IPVS_CMD_NEW_DEST
:
3441 ret
= ip_vs_add_dest(svc
, &udest
);
3443 case IPVS_CMD_SET_DEST
:
3444 ret
= ip_vs_edit_dest(svc
, &udest
);
3446 case IPVS_CMD_DEL_DEST
:
3447 ret
= ip_vs_del_dest(svc
, &udest
);
3450 ret
= ip_vs_zero_service(svc
);
3457 mutex_unlock(&__ip_vs_mutex
);
3462 static int ip_vs_genl_get_cmd(struct sk_buff
*skb
, struct genl_info
*info
)
3464 struct sk_buff
*msg
;
3466 int ret
, cmd
, reply_cmd
;
3469 net
= skb_sknet(skb
);
3470 cmd
= info
->genlhdr
->cmd
;
3472 if (cmd
== IPVS_CMD_GET_SERVICE
)
3473 reply_cmd
= IPVS_CMD_NEW_SERVICE
;
3474 else if (cmd
== IPVS_CMD_GET_INFO
)
3475 reply_cmd
= IPVS_CMD_SET_INFO
;
3476 else if (cmd
== IPVS_CMD_GET_CONFIG
)
3477 reply_cmd
= IPVS_CMD_SET_CONFIG
;
3479 pr_err("unknown Generic Netlink command\n");
3483 msg
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
3487 mutex_lock(&__ip_vs_mutex
);
3489 reply
= genlmsg_put_reply(msg
, info
, &ip_vs_genl_family
, 0, reply_cmd
);
3491 goto nla_put_failure
;
3494 case IPVS_CMD_GET_SERVICE
:
3496 struct ip_vs_service
*svc
;
3498 svc
= ip_vs_genl_find_service(net
,
3499 info
->attrs
[IPVS_CMD_ATTR_SERVICE
]);
3504 ret
= ip_vs_genl_fill_service(msg
, svc
);
3506 goto nla_put_failure
;
3515 case IPVS_CMD_GET_CONFIG
:
3517 struct ip_vs_timeout_user t
;
3519 __ip_vs_get_timeouts(net
, &t
);
3520 #ifdef CONFIG_IP_VS_PROTO_TCP
3521 if (nla_put_u32(msg
, IPVS_CMD_ATTR_TIMEOUT_TCP
,
3523 nla_put_u32(msg
, IPVS_CMD_ATTR_TIMEOUT_TCP_FIN
,
3525 goto nla_put_failure
;
3527 #ifdef CONFIG_IP_VS_PROTO_UDP
3528 if (nla_put_u32(msg
, IPVS_CMD_ATTR_TIMEOUT_UDP
, t
.udp_timeout
))
3529 goto nla_put_failure
;
3535 case IPVS_CMD_GET_INFO
:
3536 if (nla_put_u32(msg
, IPVS_INFO_ATTR_VERSION
,
3537 IP_VS_VERSION_CODE
) ||
3538 nla_put_u32(msg
, IPVS_INFO_ATTR_CONN_TAB_SIZE
,
3539 ip_vs_conn_tab_size
))
3540 goto nla_put_failure
;
3544 genlmsg_end(msg
, reply
);
3545 ret
= genlmsg_reply(msg
, info
);
3549 pr_err("not enough space in Netlink message\n");
3555 mutex_unlock(&__ip_vs_mutex
);
3561 static const struct genl_ops ip_vs_genl_ops
[] = {
3563 .cmd
= IPVS_CMD_NEW_SERVICE
,
3564 .flags
= GENL_ADMIN_PERM
,
3565 .policy
= ip_vs_cmd_policy
,
3566 .doit
= ip_vs_genl_set_cmd
,
3569 .cmd
= IPVS_CMD_SET_SERVICE
,
3570 .flags
= GENL_ADMIN_PERM
,
3571 .policy
= ip_vs_cmd_policy
,
3572 .doit
= ip_vs_genl_set_cmd
,
3575 .cmd
= IPVS_CMD_DEL_SERVICE
,
3576 .flags
= GENL_ADMIN_PERM
,
3577 .policy
= ip_vs_cmd_policy
,
3578 .doit
= ip_vs_genl_set_cmd
,
3581 .cmd
= IPVS_CMD_GET_SERVICE
,
3582 .flags
= GENL_ADMIN_PERM
,
3583 .doit
= ip_vs_genl_get_cmd
,
3584 .dumpit
= ip_vs_genl_dump_services
,
3585 .policy
= ip_vs_cmd_policy
,
3588 .cmd
= IPVS_CMD_NEW_DEST
,
3589 .flags
= GENL_ADMIN_PERM
,
3590 .policy
= ip_vs_cmd_policy
,
3591 .doit
= ip_vs_genl_set_cmd
,
3594 .cmd
= IPVS_CMD_SET_DEST
,
3595 .flags
= GENL_ADMIN_PERM
,
3596 .policy
= ip_vs_cmd_policy
,
3597 .doit
= ip_vs_genl_set_cmd
,
3600 .cmd
= IPVS_CMD_DEL_DEST
,
3601 .flags
= GENL_ADMIN_PERM
,
3602 .policy
= ip_vs_cmd_policy
,
3603 .doit
= ip_vs_genl_set_cmd
,
3606 .cmd
= IPVS_CMD_GET_DEST
,
3607 .flags
= GENL_ADMIN_PERM
,
3608 .policy
= ip_vs_cmd_policy
,
3609 .dumpit
= ip_vs_genl_dump_dests
,
3612 .cmd
= IPVS_CMD_NEW_DAEMON
,
3613 .flags
= GENL_ADMIN_PERM
,
3614 .policy
= ip_vs_cmd_policy
,
3615 .doit
= ip_vs_genl_set_daemon
,
3618 .cmd
= IPVS_CMD_DEL_DAEMON
,
3619 .flags
= GENL_ADMIN_PERM
,
3620 .policy
= ip_vs_cmd_policy
,
3621 .doit
= ip_vs_genl_set_daemon
,
3624 .cmd
= IPVS_CMD_GET_DAEMON
,
3625 .flags
= GENL_ADMIN_PERM
,
3626 .dumpit
= ip_vs_genl_dump_daemons
,
3629 .cmd
= IPVS_CMD_SET_CONFIG
,
3630 .flags
= GENL_ADMIN_PERM
,
3631 .policy
= ip_vs_cmd_policy
,
3632 .doit
= ip_vs_genl_set_cmd
,
3635 .cmd
= IPVS_CMD_GET_CONFIG
,
3636 .flags
= GENL_ADMIN_PERM
,
3637 .doit
= ip_vs_genl_get_cmd
,
3640 .cmd
= IPVS_CMD_GET_INFO
,
3641 .flags
= GENL_ADMIN_PERM
,
3642 .doit
= ip_vs_genl_get_cmd
,
3645 .cmd
= IPVS_CMD_ZERO
,
3646 .flags
= GENL_ADMIN_PERM
,
3647 .policy
= ip_vs_cmd_policy
,
3648 .doit
= ip_vs_genl_set_cmd
,
3651 .cmd
= IPVS_CMD_FLUSH
,
3652 .flags
= GENL_ADMIN_PERM
,
3653 .doit
= ip_vs_genl_set_cmd
,
3657 static int __init
ip_vs_genl_register(void)
3659 return genl_register_family_with_ops(&ip_vs_genl_family
,
3663 static void ip_vs_genl_unregister(void)
3665 genl_unregister_family(&ip_vs_genl_family
);
3668 /* End of Generic Netlink interface definitions */
3671 * per netns intit/exit func.
3673 #ifdef CONFIG_SYSCTL
3674 static int __net_init
ip_vs_control_net_init_sysctl(struct net
*net
)
3677 struct netns_ipvs
*ipvs
= net_ipvs(net
);
3678 struct ctl_table
*tbl
;
3680 atomic_set(&ipvs
->dropentry
, 0);
3681 spin_lock_init(&ipvs
->dropentry_lock
);
3682 spin_lock_init(&ipvs
->droppacket_lock
);
3683 spin_lock_init(&ipvs
->securetcp_lock
);
3685 if (!net_eq(net
, &init_net
)) {
3686 tbl
= kmemdup(vs_vars
, sizeof(vs_vars
), GFP_KERNEL
);
3690 /* Don't export sysctls to unprivileged users */
3691 if (net
->user_ns
!= &init_user_ns
)
3692 tbl
[0].procname
= NULL
;
3695 /* Initialize sysctl defaults */
3697 ipvs
->sysctl_amemthresh
= 1024;
3698 tbl
[idx
++].data
= &ipvs
->sysctl_amemthresh
;
3699 ipvs
->sysctl_am_droprate
= 10;
3700 tbl
[idx
++].data
= &ipvs
->sysctl_am_droprate
;
3701 tbl
[idx
++].data
= &ipvs
->sysctl_drop_entry
;
3702 tbl
[idx
++].data
= &ipvs
->sysctl_drop_packet
;
3703 #ifdef CONFIG_IP_VS_NFCT
3704 tbl
[idx
++].data
= &ipvs
->sysctl_conntrack
;
3706 tbl
[idx
++].data
= &ipvs
->sysctl_secure_tcp
;
3707 ipvs
->sysctl_snat_reroute
= 1;
3708 tbl
[idx
++].data
= &ipvs
->sysctl_snat_reroute
;
3709 ipvs
->sysctl_sync_ver
= 1;
3710 tbl
[idx
++].data
= &ipvs
->sysctl_sync_ver
;
3711 ipvs
->sysctl_sync_ports
= 1;
3712 tbl
[idx
++].data
= &ipvs
->sysctl_sync_ports
;
3713 tbl
[idx
++].data
= &ipvs
->sysctl_sync_persist_mode
;
3714 ipvs
->sysctl_sync_qlen_max
= nr_free_buffer_pages() / 32;
3715 tbl
[idx
++].data
= &ipvs
->sysctl_sync_qlen_max
;
3716 ipvs
->sysctl_sync_sock_size
= 0;
3717 tbl
[idx
++].data
= &ipvs
->sysctl_sync_sock_size
;
3718 tbl
[idx
++].data
= &ipvs
->sysctl_cache_bypass
;
3719 tbl
[idx
++].data
= &ipvs
->sysctl_expire_nodest_conn
;
3720 tbl
[idx
++].data
= &ipvs
->sysctl_sloppy_tcp
;
3721 tbl
[idx
++].data
= &ipvs
->sysctl_sloppy_sctp
;
3722 tbl
[idx
++].data
= &ipvs
->sysctl_expire_quiescent_template
;
3723 ipvs
->sysctl_sync_threshold
[0] = DEFAULT_SYNC_THRESHOLD
;
3724 ipvs
->sysctl_sync_threshold
[1] = DEFAULT_SYNC_PERIOD
;
3725 tbl
[idx
].data
= &ipvs
->sysctl_sync_threshold
;
3726 tbl
[idx
++].maxlen
= sizeof(ipvs
->sysctl_sync_threshold
);
3727 ipvs
->sysctl_sync_refresh_period
= DEFAULT_SYNC_REFRESH_PERIOD
;
3728 tbl
[idx
++].data
= &ipvs
->sysctl_sync_refresh_period
;
3729 ipvs
->sysctl_sync_retries
= clamp_t(int, DEFAULT_SYNC_RETRIES
, 0, 3);
3730 tbl
[idx
++].data
= &ipvs
->sysctl_sync_retries
;
3731 tbl
[idx
++].data
= &ipvs
->sysctl_nat_icmp_send
;
3732 ipvs
->sysctl_pmtu_disc
= 1;
3733 tbl
[idx
++].data
= &ipvs
->sysctl_pmtu_disc
;
3734 tbl
[idx
++].data
= &ipvs
->sysctl_backup_only
;
3737 ipvs
->sysctl_hdr
= register_net_sysctl(net
, "net/ipv4/vs", tbl
);
3738 if (ipvs
->sysctl_hdr
== NULL
) {
3739 if (!net_eq(net
, &init_net
))
3743 ip_vs_start_estimator(net
, &ipvs
->tot_stats
);
3744 ipvs
->sysctl_tbl
= tbl
;
3745 /* Schedule defense work */
3746 INIT_DELAYED_WORK(&ipvs
->defense_work
, defense_work_handler
);
3747 schedule_delayed_work(&ipvs
->defense_work
, DEFENSE_TIMER_PERIOD
);
3752 static void __net_exit
ip_vs_control_net_cleanup_sysctl(struct net
*net
)
3754 struct netns_ipvs
*ipvs
= net_ipvs(net
);
3756 cancel_delayed_work_sync(&ipvs
->defense_work
);
3757 cancel_work_sync(&ipvs
->defense_work
.work
);
3758 unregister_net_sysctl_table(ipvs
->sysctl_hdr
);
3759 ip_vs_stop_estimator(net
, &ipvs
->tot_stats
);
3764 static int __net_init
ip_vs_control_net_init_sysctl(struct net
*net
) { return 0; }
3765 static void __net_exit
ip_vs_control_net_cleanup_sysctl(struct net
*net
) { }
3769 static struct notifier_block ip_vs_dst_notifier
= {
3770 .notifier_call
= ip_vs_dst_event
,
3773 int __net_init
ip_vs_control_net_init(struct net
*net
)
3776 struct netns_ipvs
*ipvs
= net_ipvs(net
);
3778 /* Initialize rs_table */
3779 for (idx
= 0; idx
< IP_VS_RTAB_SIZE
; idx
++)
3780 INIT_HLIST_HEAD(&ipvs
->rs_table
[idx
]);
3782 INIT_LIST_HEAD(&ipvs
->dest_trash
);
3783 spin_lock_init(&ipvs
->dest_trash_lock
);
3784 setup_timer(&ipvs
->dest_trash_timer
, ip_vs_dest_trash_expire
,
3785 (unsigned long) net
);
3786 atomic_set(&ipvs
->ftpsvc_counter
, 0);
3787 atomic_set(&ipvs
->nullsvc_counter
, 0);
3790 ipvs
->tot_stats
.cpustats
= alloc_percpu(struct ip_vs_cpu_stats
);
3791 if (!ipvs
->tot_stats
.cpustats
)
3794 for_each_possible_cpu(i
) {
3795 struct ip_vs_cpu_stats
*ipvs_tot_stats
;
3796 ipvs_tot_stats
= per_cpu_ptr(ipvs
->tot_stats
.cpustats
, i
);
3797 u64_stats_init(&ipvs_tot_stats
->syncp
);
3800 spin_lock_init(&ipvs
->tot_stats
.lock
);
3802 proc_create("ip_vs", 0, net
->proc_net
, &ip_vs_info_fops
);
3803 proc_create("ip_vs_stats", 0, net
->proc_net
, &ip_vs_stats_fops
);
3804 proc_create("ip_vs_stats_percpu", 0, net
->proc_net
,
3805 &ip_vs_stats_percpu_fops
);
3807 if (ip_vs_control_net_init_sysctl(net
))
3813 free_percpu(ipvs
->tot_stats
.cpustats
);
3817 void __net_exit
ip_vs_control_net_cleanup(struct net
*net
)
3819 struct netns_ipvs
*ipvs
= net_ipvs(net
);
3821 ip_vs_trash_cleanup(net
);
3822 ip_vs_control_net_cleanup_sysctl(net
);
3823 remove_proc_entry("ip_vs_stats_percpu", net
->proc_net
);
3824 remove_proc_entry("ip_vs_stats", net
->proc_net
);
3825 remove_proc_entry("ip_vs", net
->proc_net
);
3826 free_percpu(ipvs
->tot_stats
.cpustats
);
3829 int __init
ip_vs_register_nl_ioctl(void)
3833 ret
= nf_register_sockopt(&ip_vs_sockopts
);
3835 pr_err("cannot register sockopt.\n");
3839 ret
= ip_vs_genl_register();
3841 pr_err("cannot register Generic Netlink interface.\n");
3847 nf_unregister_sockopt(&ip_vs_sockopts
);
3852 void ip_vs_unregister_nl_ioctl(void)
3854 ip_vs_genl_unregister();
3855 nf_unregister_sockopt(&ip_vs_sockopts
);
3858 int __init
ip_vs_control_init(void)
3865 /* Initialize svc_table, ip_vs_svc_fwm_table */
3866 for (idx
= 0; idx
< IP_VS_SVC_TAB_SIZE
; idx
++) {
3867 INIT_HLIST_HEAD(&ip_vs_svc_table
[idx
]);
3868 INIT_HLIST_HEAD(&ip_vs_svc_fwm_table
[idx
]);
3871 smp_wmb(); /* Do we really need it now ? */
3873 ret
= register_netdevice_notifier(&ip_vs_dst_notifier
);
3882 void ip_vs_control_cleanup(void)
3885 unregister_netdevice_notifier(&ip_vs_dst_notifier
);