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_kstats
*dst
, struct ip_vs_stats
*src
)
734 #define IP_VS_SHOW_STATS_COUNTER(c) dst->c = src->kstats.c - src->kstats0.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_export_stats_user(struct ip_vs_stats_user
*dst
, struct ip_vs_kstats
*src
)
752 dst
->conns
= (u32
)src
->conns
;
753 dst
->inpkts
= (u32
)src
->inpkts
;
754 dst
->outpkts
= (u32
)src
->outpkts
;
755 dst
->inbytes
= src
->inbytes
;
756 dst
->outbytes
= src
->outbytes
;
757 dst
->cps
= (u32
)src
->cps
;
758 dst
->inpps
= (u32
)src
->inpps
;
759 dst
->outpps
= (u32
)src
->outpps
;
760 dst
->inbps
= (u32
)src
->inbps
;
761 dst
->outbps
= (u32
)src
->outbps
;
765 ip_vs_zero_stats(struct ip_vs_stats
*stats
)
767 spin_lock_bh(&stats
->lock
);
769 /* get current counters as zero point, rates are zeroed */
771 #define IP_VS_ZERO_STATS_COUNTER(c) stats->kstats0.c = stats->kstats.c
773 IP_VS_ZERO_STATS_COUNTER(conns
);
774 IP_VS_ZERO_STATS_COUNTER(inpkts
);
775 IP_VS_ZERO_STATS_COUNTER(outpkts
);
776 IP_VS_ZERO_STATS_COUNTER(inbytes
);
777 IP_VS_ZERO_STATS_COUNTER(outbytes
);
779 ip_vs_zero_estimator(stats
);
781 spin_unlock_bh(&stats
->lock
);
785 * Update a destination in the given service
788 __ip_vs_update_dest(struct ip_vs_service
*svc
, struct ip_vs_dest
*dest
,
789 struct ip_vs_dest_user_kern
*udest
, int add
)
791 struct netns_ipvs
*ipvs
= net_ipvs(svc
->net
);
792 struct ip_vs_service
*old_svc
;
793 struct ip_vs_scheduler
*sched
;
796 /* We cannot modify an address and change the address family */
797 BUG_ON(!add
&& udest
->af
!= dest
->af
);
799 if (add
&& udest
->af
!= svc
->af
)
800 ipvs
->mixed_address_family_dests
++;
802 /* set the weight and the flags */
803 atomic_set(&dest
->weight
, udest
->weight
);
804 conn_flags
= udest
->conn_flags
& IP_VS_CONN_F_DEST_MASK
;
805 conn_flags
|= IP_VS_CONN_F_INACTIVE
;
807 /* set the IP_VS_CONN_F_NOOUTPUT flag if not masquerading/NAT */
808 if ((conn_flags
& IP_VS_CONN_F_FWD_MASK
) != IP_VS_CONN_F_MASQ
) {
809 conn_flags
|= IP_VS_CONN_F_NOOUTPUT
;
812 * Put the real service in rs_table if not present.
813 * For now only for NAT!
815 ip_vs_rs_hash(ipvs
, dest
);
817 atomic_set(&dest
->conn_flags
, conn_flags
);
819 /* bind the service */
820 old_svc
= rcu_dereference_protected(dest
->svc
, 1);
822 __ip_vs_bind_svc(dest
, svc
);
824 if (old_svc
!= svc
) {
825 ip_vs_zero_stats(&dest
->stats
);
826 __ip_vs_bind_svc(dest
, svc
);
827 __ip_vs_svc_put(old_svc
, true);
831 /* set the dest status flags */
832 dest
->flags
|= IP_VS_DEST_F_AVAILABLE
;
834 if (udest
->u_threshold
== 0 || udest
->u_threshold
> dest
->u_threshold
)
835 dest
->flags
&= ~IP_VS_DEST_F_OVERLOAD
;
836 dest
->u_threshold
= udest
->u_threshold
;
837 dest
->l_threshold
= udest
->l_threshold
;
839 dest
->af
= udest
->af
;
841 spin_lock_bh(&dest
->dst_lock
);
842 __ip_vs_dst_cache_reset(dest
);
843 spin_unlock_bh(&dest
->dst_lock
);
846 ip_vs_start_estimator(svc
->net
, &dest
->stats
);
847 list_add_rcu(&dest
->n_list
, &svc
->destinations
);
849 sched
= rcu_dereference_protected(svc
->scheduler
, 1);
850 if (sched
&& sched
->add_dest
)
851 sched
->add_dest(svc
, dest
);
853 sched
= rcu_dereference_protected(svc
->scheduler
, 1);
854 if (sched
&& sched
->upd_dest
)
855 sched
->upd_dest(svc
, dest
);
861 * Create a destination for the given service
864 ip_vs_new_dest(struct ip_vs_service
*svc
, struct ip_vs_dest_user_kern
*udest
,
865 struct ip_vs_dest
**dest_p
)
867 struct ip_vs_dest
*dest
;
868 unsigned int atype
, i
;
872 #ifdef CONFIG_IP_VS_IPV6
873 if (udest
->af
== AF_INET6
) {
874 atype
= ipv6_addr_type(&udest
->addr
.in6
);
875 if ((!(atype
& IPV6_ADDR_UNICAST
) ||
876 atype
& IPV6_ADDR_LINKLOCAL
) &&
877 !__ip_vs_addr_is_local_v6(svc
->net
, &udest
->addr
.in6
))
882 atype
= inet_addr_type(svc
->net
, udest
->addr
.ip
);
883 if (atype
!= RTN_LOCAL
&& atype
!= RTN_UNICAST
)
887 dest
= kzalloc(sizeof(struct ip_vs_dest
), GFP_KERNEL
);
891 dest
->stats
.cpustats
= alloc_percpu(struct ip_vs_cpu_stats
);
892 if (!dest
->stats
.cpustats
)
895 for_each_possible_cpu(i
) {
896 struct ip_vs_cpu_stats
*ip_vs_dest_stats
;
897 ip_vs_dest_stats
= per_cpu_ptr(dest
->stats
.cpustats
, i
);
898 u64_stats_init(&ip_vs_dest_stats
->syncp
);
901 dest
->af
= udest
->af
;
902 dest
->protocol
= svc
->protocol
;
903 dest
->vaddr
= svc
->addr
;
904 dest
->vport
= svc
->port
;
905 dest
->vfwmark
= svc
->fwmark
;
906 ip_vs_addr_copy(udest
->af
, &dest
->addr
, &udest
->addr
);
907 dest
->port
= udest
->port
;
909 atomic_set(&dest
->activeconns
, 0);
910 atomic_set(&dest
->inactconns
, 0);
911 atomic_set(&dest
->persistconns
, 0);
912 atomic_set(&dest
->refcnt
, 1);
914 INIT_HLIST_NODE(&dest
->d_list
);
915 spin_lock_init(&dest
->dst_lock
);
916 spin_lock_init(&dest
->stats
.lock
);
917 __ip_vs_update_dest(svc
, dest
, udest
, 1);
931 * Add a destination into an existing service
934 ip_vs_add_dest(struct ip_vs_service
*svc
, struct ip_vs_dest_user_kern
*udest
)
936 struct ip_vs_dest
*dest
;
937 union nf_inet_addr daddr
;
938 __be16 dport
= udest
->port
;
943 if (udest
->weight
< 0) {
944 pr_err("%s(): server weight less than zero\n", __func__
);
948 if (udest
->l_threshold
> udest
->u_threshold
) {
949 pr_err("%s(): lower threshold is higher than upper threshold\n",
954 ip_vs_addr_copy(udest
->af
, &daddr
, &udest
->addr
);
956 /* We use function that requires RCU lock */
958 dest
= ip_vs_lookup_dest(svc
, udest
->af
, &daddr
, dport
);
962 IP_VS_DBG(1, "%s(): dest already exists\n", __func__
);
967 * Check if the dest already exists in the trash and
968 * is from the same service
970 dest
= ip_vs_trash_get_dest(svc
, udest
->af
, &daddr
, dport
);
973 IP_VS_DBG_BUF(3, "Get destination %s:%u from trash, "
974 "dest->refcnt=%d, service %u/%s:%u\n",
975 IP_VS_DBG_ADDR(udest
->af
, &daddr
), ntohs(dport
),
976 atomic_read(&dest
->refcnt
),
978 IP_VS_DBG_ADDR(svc
->af
, &dest
->vaddr
),
981 __ip_vs_update_dest(svc
, dest
, udest
, 1);
985 * Allocate and initialize the dest structure
987 ret
= ip_vs_new_dest(svc
, udest
, &dest
);
996 * Edit a destination in the given service
999 ip_vs_edit_dest(struct ip_vs_service
*svc
, struct ip_vs_dest_user_kern
*udest
)
1001 struct ip_vs_dest
*dest
;
1002 union nf_inet_addr daddr
;
1003 __be16 dport
= udest
->port
;
1007 if (udest
->weight
< 0) {
1008 pr_err("%s(): server weight less than zero\n", __func__
);
1012 if (udest
->l_threshold
> udest
->u_threshold
) {
1013 pr_err("%s(): lower threshold is higher than upper threshold\n",
1018 ip_vs_addr_copy(udest
->af
, &daddr
, &udest
->addr
);
1020 /* We use function that requires RCU lock */
1022 dest
= ip_vs_lookup_dest(svc
, udest
->af
, &daddr
, dport
);
1026 IP_VS_DBG(1, "%s(): dest doesn't exist\n", __func__
);
1030 __ip_vs_update_dest(svc
, dest
, udest
, 0);
1037 * Delete a destination (must be already unlinked from the service)
1039 static void __ip_vs_del_dest(struct net
*net
, struct ip_vs_dest
*dest
,
1042 struct netns_ipvs
*ipvs
= net_ipvs(net
);
1044 ip_vs_stop_estimator(net
, &dest
->stats
);
1047 * Remove it from the d-linked list with the real services.
1049 ip_vs_rs_unhash(dest
);
1051 spin_lock_bh(&ipvs
->dest_trash_lock
);
1052 IP_VS_DBG_BUF(3, "Moving dest %s:%u into trash, dest->refcnt=%d\n",
1053 IP_VS_DBG_ADDR(dest
->af
, &dest
->addr
), ntohs(dest
->port
),
1054 atomic_read(&dest
->refcnt
));
1055 if (list_empty(&ipvs
->dest_trash
) && !cleanup
)
1056 mod_timer(&ipvs
->dest_trash_timer
,
1057 jiffies
+ (IP_VS_DEST_TRASH_PERIOD
>> 1));
1058 /* dest lives in trash without reference */
1059 list_add(&dest
->t_list
, &ipvs
->dest_trash
);
1060 dest
->idle_start
= 0;
1061 spin_unlock_bh(&ipvs
->dest_trash_lock
);
1062 ip_vs_dest_put(dest
);
1067 * Unlink a destination from the given service
1069 static void __ip_vs_unlink_dest(struct ip_vs_service
*svc
,
1070 struct ip_vs_dest
*dest
,
1073 dest
->flags
&= ~IP_VS_DEST_F_AVAILABLE
;
1076 * Remove it from the d-linked destination list.
1078 list_del_rcu(&dest
->n_list
);
1081 if (dest
->af
!= svc
->af
)
1082 net_ipvs(svc
->net
)->mixed_address_family_dests
--;
1085 struct ip_vs_scheduler
*sched
;
1087 sched
= rcu_dereference_protected(svc
->scheduler
, 1);
1088 if (sched
&& sched
->del_dest
)
1089 sched
->del_dest(svc
, dest
);
1095 * Delete a destination server in the given service
1098 ip_vs_del_dest(struct ip_vs_service
*svc
, struct ip_vs_dest_user_kern
*udest
)
1100 struct ip_vs_dest
*dest
;
1101 __be16 dport
= udest
->port
;
1105 /* We use function that requires RCU lock */
1107 dest
= ip_vs_lookup_dest(svc
, udest
->af
, &udest
->addr
, dport
);
1111 IP_VS_DBG(1, "%s(): destination not found!\n", __func__
);
1116 * Unlink dest from the service
1118 __ip_vs_unlink_dest(svc
, dest
, 1);
1121 * Delete the destination
1123 __ip_vs_del_dest(svc
->net
, dest
, false);
1130 static void ip_vs_dest_trash_expire(unsigned long data
)
1132 struct net
*net
= (struct net
*) data
;
1133 struct netns_ipvs
*ipvs
= net_ipvs(net
);
1134 struct ip_vs_dest
*dest
, *next
;
1135 unsigned long now
= jiffies
;
1137 spin_lock(&ipvs
->dest_trash_lock
);
1138 list_for_each_entry_safe(dest
, next
, &ipvs
->dest_trash
, t_list
) {
1139 if (atomic_read(&dest
->refcnt
) > 0)
1141 if (dest
->idle_start
) {
1142 if (time_before(now
, dest
->idle_start
+
1143 IP_VS_DEST_TRASH_PERIOD
))
1146 dest
->idle_start
= max(1UL, now
);
1149 IP_VS_DBG_BUF(3, "Removing destination %u/%s:%u from trash\n",
1151 IP_VS_DBG_ADDR(dest
->af
, &dest
->addr
),
1153 list_del(&dest
->t_list
);
1154 ip_vs_dest_free(dest
);
1156 if (!list_empty(&ipvs
->dest_trash
))
1157 mod_timer(&ipvs
->dest_trash_timer
,
1158 jiffies
+ (IP_VS_DEST_TRASH_PERIOD
>> 1));
1159 spin_unlock(&ipvs
->dest_trash_lock
);
1163 * Add a service into the service hash table
1166 ip_vs_add_service(struct net
*net
, struct ip_vs_service_user_kern
*u
,
1167 struct ip_vs_service
**svc_p
)
1170 struct ip_vs_scheduler
*sched
= NULL
;
1171 struct ip_vs_pe
*pe
= NULL
;
1172 struct ip_vs_service
*svc
= NULL
;
1173 struct netns_ipvs
*ipvs
= net_ipvs(net
);
1175 /* increase the module use count */
1176 ip_vs_use_count_inc();
1178 /* Lookup the scheduler by 'u->sched_name' */
1179 if (strcmp(u
->sched_name
, "none")) {
1180 sched
= ip_vs_scheduler_get(u
->sched_name
);
1182 pr_info("Scheduler module ip_vs_%s not found\n",
1189 if (u
->pe_name
&& *u
->pe_name
) {
1190 pe
= ip_vs_pe_getbyname(u
->pe_name
);
1192 pr_info("persistence engine module ip_vs_pe_%s "
1193 "not found\n", u
->pe_name
);
1199 #ifdef CONFIG_IP_VS_IPV6
1200 if (u
->af
== AF_INET6
) {
1201 __u32 plen
= (__force __u32
) u
->netmask
;
1203 if (plen
< 1 || plen
> 128) {
1210 svc
= kzalloc(sizeof(struct ip_vs_service
), GFP_KERNEL
);
1212 IP_VS_DBG(1, "%s(): no memory\n", __func__
);
1216 svc
->stats
.cpustats
= alloc_percpu(struct ip_vs_cpu_stats
);
1217 if (!svc
->stats
.cpustats
) {
1222 for_each_possible_cpu(i
) {
1223 struct ip_vs_cpu_stats
*ip_vs_stats
;
1224 ip_vs_stats
= per_cpu_ptr(svc
->stats
.cpustats
, i
);
1225 u64_stats_init(&ip_vs_stats
->syncp
);
1229 /* I'm the first user of the service */
1230 atomic_set(&svc
->refcnt
, 0);
1233 svc
->protocol
= u
->protocol
;
1234 ip_vs_addr_copy(svc
->af
, &svc
->addr
, &u
->addr
);
1235 svc
->port
= u
->port
;
1236 svc
->fwmark
= u
->fwmark
;
1237 svc
->flags
= u
->flags
;
1238 svc
->timeout
= u
->timeout
* HZ
;
1239 svc
->netmask
= u
->netmask
;
1242 INIT_LIST_HEAD(&svc
->destinations
);
1243 spin_lock_init(&svc
->sched_lock
);
1244 spin_lock_init(&svc
->stats
.lock
);
1246 /* Bind the scheduler */
1248 ret
= ip_vs_bind_scheduler(svc
, sched
);
1254 /* Bind the ct retriever */
1255 RCU_INIT_POINTER(svc
->pe
, pe
);
1258 /* Update the virtual service counters */
1259 if (svc
->port
== FTPPORT
)
1260 atomic_inc(&ipvs
->ftpsvc_counter
);
1261 else if (svc
->port
== 0)
1262 atomic_inc(&ipvs
->nullsvc_counter
);
1264 ip_vs_start_estimator(net
, &svc
->stats
);
1266 /* Count only IPv4 services for old get/setsockopt interface */
1267 if (svc
->af
== AF_INET
)
1268 ipvs
->num_services
++;
1270 /* Hash the service into the service table */
1271 ip_vs_svc_hash(svc
);
1274 /* Now there is a service - full throttle */
1281 ip_vs_unbind_scheduler(svc
, sched
);
1282 ip_vs_service_free(svc
);
1284 ip_vs_scheduler_put(sched
);
1287 /* decrease the module use count */
1288 ip_vs_use_count_dec();
1295 * Edit a service and bind it with a new scheduler
1298 ip_vs_edit_service(struct ip_vs_service
*svc
, struct ip_vs_service_user_kern
*u
)
1300 struct ip_vs_scheduler
*sched
= NULL
, *old_sched
;
1301 struct ip_vs_pe
*pe
= NULL
, *old_pe
= NULL
;
1305 * Lookup the scheduler, by 'u->sched_name'
1307 if (strcmp(u
->sched_name
, "none")) {
1308 sched
= ip_vs_scheduler_get(u
->sched_name
);
1310 pr_info("Scheduler module ip_vs_%s not found\n",
1317 if (u
->pe_name
&& *u
->pe_name
) {
1318 pe
= ip_vs_pe_getbyname(u
->pe_name
);
1320 pr_info("persistence engine module ip_vs_pe_%s "
1321 "not found\n", u
->pe_name
);
1328 #ifdef CONFIG_IP_VS_IPV6
1329 if (u
->af
== AF_INET6
) {
1330 __u32 plen
= (__force __u32
) u
->netmask
;
1332 if (plen
< 1 || plen
> 128) {
1339 old_sched
= rcu_dereference_protected(svc
->scheduler
, 1);
1340 if (sched
!= old_sched
) {
1342 ip_vs_unbind_scheduler(svc
, old_sched
);
1343 RCU_INIT_POINTER(svc
->scheduler
, NULL
);
1344 /* Wait all svc->sched_data users */
1347 /* Bind the new scheduler */
1349 ret
= ip_vs_bind_scheduler(svc
, sched
);
1351 ip_vs_scheduler_put(sched
);
1358 * Set the flags and timeout value
1360 svc
->flags
= u
->flags
| IP_VS_SVC_F_HASHED
;
1361 svc
->timeout
= u
->timeout
* HZ
;
1362 svc
->netmask
= u
->netmask
;
1364 old_pe
= rcu_dereference_protected(svc
->pe
, 1);
1366 rcu_assign_pointer(svc
->pe
, pe
);
1369 ip_vs_scheduler_put(old_sched
);
1370 ip_vs_pe_put(old_pe
);
1375 * Delete a service from the service list
1376 * - The service must be unlinked, unlocked and not referenced!
1377 * - We are called under _bh lock
1379 static void __ip_vs_del_service(struct ip_vs_service
*svc
, bool cleanup
)
1381 struct ip_vs_dest
*dest
, *nxt
;
1382 struct ip_vs_scheduler
*old_sched
;
1383 struct ip_vs_pe
*old_pe
;
1384 struct netns_ipvs
*ipvs
= net_ipvs(svc
->net
);
1386 pr_info("%s: enter\n", __func__
);
1388 /* Count only IPv4 services for old get/setsockopt interface */
1389 if (svc
->af
== AF_INET
)
1390 ipvs
->num_services
--;
1392 ip_vs_stop_estimator(svc
->net
, &svc
->stats
);
1394 /* Unbind scheduler */
1395 old_sched
= rcu_dereference_protected(svc
->scheduler
, 1);
1396 ip_vs_unbind_scheduler(svc
, old_sched
);
1397 ip_vs_scheduler_put(old_sched
);
1399 /* Unbind persistence engine, keep svc->pe */
1400 old_pe
= rcu_dereference_protected(svc
->pe
, 1);
1401 ip_vs_pe_put(old_pe
);
1404 * Unlink the whole destination list
1406 list_for_each_entry_safe(dest
, nxt
, &svc
->destinations
, n_list
) {
1407 __ip_vs_unlink_dest(svc
, dest
, 0);
1408 __ip_vs_del_dest(svc
->net
, dest
, cleanup
);
1412 * Update the virtual service counters
1414 if (svc
->port
== FTPPORT
)
1415 atomic_dec(&ipvs
->ftpsvc_counter
);
1416 else if (svc
->port
== 0)
1417 atomic_dec(&ipvs
->nullsvc_counter
);
1420 * Free the service if nobody refers to it
1422 __ip_vs_svc_put(svc
, true);
1424 /* decrease the module use count */
1425 ip_vs_use_count_dec();
1429 * Unlink a service from list and try to delete it if its refcnt reached 0
1431 static void ip_vs_unlink_service(struct ip_vs_service
*svc
, bool cleanup
)
1433 /* Hold svc to avoid double release from dest_trash */
1434 atomic_inc(&svc
->refcnt
);
1436 * Unhash it from the service table
1438 ip_vs_svc_unhash(svc
);
1440 __ip_vs_del_service(svc
, cleanup
);
1444 * Delete a service from the service list
1446 static int ip_vs_del_service(struct ip_vs_service
*svc
)
1450 ip_vs_unlink_service(svc
, false);
1457 * Flush all the virtual services
1459 static int ip_vs_flush(struct net
*net
, bool cleanup
)
1462 struct ip_vs_service
*svc
;
1463 struct hlist_node
*n
;
1466 * Flush the service table hashed by <netns,protocol,addr,port>
1468 for(idx
= 0; idx
< IP_VS_SVC_TAB_SIZE
; idx
++) {
1469 hlist_for_each_entry_safe(svc
, n
, &ip_vs_svc_table
[idx
],
1471 if (net_eq(svc
->net
, net
))
1472 ip_vs_unlink_service(svc
, cleanup
);
1477 * Flush the service table hashed by fwmark
1479 for(idx
= 0; idx
< IP_VS_SVC_TAB_SIZE
; idx
++) {
1480 hlist_for_each_entry_safe(svc
, n
, &ip_vs_svc_fwm_table
[idx
],
1482 if (net_eq(svc
->net
, net
))
1483 ip_vs_unlink_service(svc
, cleanup
);
1491 * Delete service by {netns} in the service table.
1492 * Called by __ip_vs_cleanup()
1494 void ip_vs_service_net_cleanup(struct net
*net
)
1497 /* Check for "full" addressed entries */
1498 mutex_lock(&__ip_vs_mutex
);
1499 ip_vs_flush(net
, true);
1500 mutex_unlock(&__ip_vs_mutex
);
1504 /* Put all references for device (dst_cache) */
1506 ip_vs_forget_dev(struct ip_vs_dest
*dest
, struct net_device
*dev
)
1508 struct ip_vs_dest_dst
*dest_dst
;
1510 spin_lock_bh(&dest
->dst_lock
);
1511 dest_dst
= rcu_dereference_protected(dest
->dest_dst
, 1);
1512 if (dest_dst
&& dest_dst
->dst_cache
->dev
== dev
) {
1513 IP_VS_DBG_BUF(3, "Reset dev:%s dest %s:%u ,dest->refcnt=%d\n",
1515 IP_VS_DBG_ADDR(dest
->af
, &dest
->addr
),
1517 atomic_read(&dest
->refcnt
));
1518 __ip_vs_dst_cache_reset(dest
);
1520 spin_unlock_bh(&dest
->dst_lock
);
1523 /* Netdev event receiver
1524 * Currently only NETDEV_DOWN is handled to release refs to cached dsts
1526 static int ip_vs_dst_event(struct notifier_block
*this, unsigned long event
,
1529 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
1530 struct net
*net
= dev_net(dev
);
1531 struct netns_ipvs
*ipvs
= net_ipvs(net
);
1532 struct ip_vs_service
*svc
;
1533 struct ip_vs_dest
*dest
;
1536 if (event
!= NETDEV_DOWN
|| !ipvs
)
1538 IP_VS_DBG(3, "%s() dev=%s\n", __func__
, dev
->name
);
1540 mutex_lock(&__ip_vs_mutex
);
1541 for (idx
= 0; idx
< IP_VS_SVC_TAB_SIZE
; idx
++) {
1542 hlist_for_each_entry(svc
, &ip_vs_svc_table
[idx
], s_list
) {
1543 if (net_eq(svc
->net
, net
)) {
1544 list_for_each_entry(dest
, &svc
->destinations
,
1546 ip_vs_forget_dev(dest
, dev
);
1551 hlist_for_each_entry(svc
, &ip_vs_svc_fwm_table
[idx
], f_list
) {
1552 if (net_eq(svc
->net
, net
)) {
1553 list_for_each_entry(dest
, &svc
->destinations
,
1555 ip_vs_forget_dev(dest
, dev
);
1562 spin_lock_bh(&ipvs
->dest_trash_lock
);
1563 list_for_each_entry(dest
, &ipvs
->dest_trash
, t_list
) {
1564 ip_vs_forget_dev(dest
, dev
);
1566 spin_unlock_bh(&ipvs
->dest_trash_lock
);
1567 mutex_unlock(&__ip_vs_mutex
);
1573 * Zero counters in a service or all services
1575 static int ip_vs_zero_service(struct ip_vs_service
*svc
)
1577 struct ip_vs_dest
*dest
;
1579 list_for_each_entry(dest
, &svc
->destinations
, n_list
) {
1580 ip_vs_zero_stats(&dest
->stats
);
1582 ip_vs_zero_stats(&svc
->stats
);
1586 static int ip_vs_zero_all(struct net
*net
)
1589 struct ip_vs_service
*svc
;
1591 for(idx
= 0; idx
< IP_VS_SVC_TAB_SIZE
; idx
++) {
1592 hlist_for_each_entry(svc
, &ip_vs_svc_table
[idx
], s_list
) {
1593 if (net_eq(svc
->net
, net
))
1594 ip_vs_zero_service(svc
);
1598 for(idx
= 0; idx
< IP_VS_SVC_TAB_SIZE
; idx
++) {
1599 hlist_for_each_entry(svc
, &ip_vs_svc_fwm_table
[idx
], f_list
) {
1600 if (net_eq(svc
->net
, net
))
1601 ip_vs_zero_service(svc
);
1605 ip_vs_zero_stats(&net_ipvs(net
)->tot_stats
);
1609 #ifdef CONFIG_SYSCTL
1612 static int three
= 3;
1615 proc_do_defense_mode(struct ctl_table
*table
, int write
,
1616 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
1618 struct net
*net
= current
->nsproxy
->net_ns
;
1619 int *valp
= table
->data
;
1623 rc
= proc_dointvec(table
, write
, buffer
, lenp
, ppos
);
1624 if (write
&& (*valp
!= val
)) {
1625 if ((*valp
< 0) || (*valp
> 3)) {
1626 /* Restore the correct value */
1629 update_defense_level(net_ipvs(net
));
1636 proc_do_sync_threshold(struct ctl_table
*table
, int write
,
1637 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
1639 int *valp
= table
->data
;
1643 /* backup the value first */
1644 memcpy(val
, valp
, sizeof(val
));
1646 rc
= proc_dointvec(table
, write
, buffer
, lenp
, ppos
);
1647 if (write
&& (valp
[0] < 0 || valp
[1] < 0 ||
1648 (valp
[0] >= valp
[1] && valp
[1]))) {
1649 /* Restore the correct value */
1650 memcpy(valp
, val
, sizeof(val
));
1656 proc_do_sync_mode(struct ctl_table
*table
, int write
,
1657 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
1659 int *valp
= table
->data
;
1663 rc
= proc_dointvec(table
, write
, buffer
, lenp
, ppos
);
1664 if (write
&& (*valp
!= val
)) {
1665 if ((*valp
< 0) || (*valp
> 1)) {
1666 /* Restore the correct value */
1674 proc_do_sync_ports(struct ctl_table
*table
, int write
,
1675 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
1677 int *valp
= table
->data
;
1681 rc
= proc_dointvec(table
, write
, buffer
, lenp
, ppos
);
1682 if (write
&& (*valp
!= val
)) {
1683 if (*valp
< 1 || !is_power_of_2(*valp
)) {
1684 /* Restore the correct value */
1692 * IPVS sysctl table (under the /proc/sys/net/ipv4/vs/)
1693 * Do not change order or insert new entries without
1694 * align with netns init in ip_vs_control_net_init()
1697 static struct ctl_table vs_vars
[] = {
1699 .procname
= "amemthresh",
1700 .maxlen
= sizeof(int),
1702 .proc_handler
= proc_dointvec
,
1705 .procname
= "am_droprate",
1706 .maxlen
= sizeof(int),
1708 .proc_handler
= proc_dointvec
,
1711 .procname
= "drop_entry",
1712 .maxlen
= sizeof(int),
1714 .proc_handler
= proc_do_defense_mode
,
1717 .procname
= "drop_packet",
1718 .maxlen
= sizeof(int),
1720 .proc_handler
= proc_do_defense_mode
,
1722 #ifdef CONFIG_IP_VS_NFCT
1724 .procname
= "conntrack",
1725 .maxlen
= sizeof(int),
1727 .proc_handler
= &proc_dointvec
,
1731 .procname
= "secure_tcp",
1732 .maxlen
= sizeof(int),
1734 .proc_handler
= proc_do_defense_mode
,
1737 .procname
= "snat_reroute",
1738 .maxlen
= sizeof(int),
1740 .proc_handler
= &proc_dointvec
,
1743 .procname
= "sync_version",
1744 .maxlen
= sizeof(int),
1746 .proc_handler
= &proc_do_sync_mode
,
1749 .procname
= "sync_ports",
1750 .maxlen
= sizeof(int),
1752 .proc_handler
= &proc_do_sync_ports
,
1755 .procname
= "sync_persist_mode",
1756 .maxlen
= sizeof(int),
1758 .proc_handler
= proc_dointvec
,
1761 .procname
= "sync_qlen_max",
1762 .maxlen
= sizeof(unsigned long),
1764 .proc_handler
= proc_doulongvec_minmax
,
1767 .procname
= "sync_sock_size",
1768 .maxlen
= sizeof(int),
1770 .proc_handler
= proc_dointvec
,
1773 .procname
= "cache_bypass",
1774 .maxlen
= sizeof(int),
1776 .proc_handler
= proc_dointvec
,
1779 .procname
= "expire_nodest_conn",
1780 .maxlen
= sizeof(int),
1782 .proc_handler
= proc_dointvec
,
1785 .procname
= "sloppy_tcp",
1786 .maxlen
= sizeof(int),
1788 .proc_handler
= proc_dointvec
,
1791 .procname
= "sloppy_sctp",
1792 .maxlen
= sizeof(int),
1794 .proc_handler
= proc_dointvec
,
1797 .procname
= "expire_quiescent_template",
1798 .maxlen
= sizeof(int),
1800 .proc_handler
= proc_dointvec
,
1803 .procname
= "sync_threshold",
1805 sizeof(((struct netns_ipvs
*)0)->sysctl_sync_threshold
),
1807 .proc_handler
= proc_do_sync_threshold
,
1810 .procname
= "sync_refresh_period",
1811 .maxlen
= sizeof(int),
1813 .proc_handler
= proc_dointvec_jiffies
,
1816 .procname
= "sync_retries",
1817 .maxlen
= sizeof(int),
1819 .proc_handler
= proc_dointvec_minmax
,
1824 .procname
= "nat_icmp_send",
1825 .maxlen
= sizeof(int),
1827 .proc_handler
= proc_dointvec
,
1830 .procname
= "pmtu_disc",
1831 .maxlen
= sizeof(int),
1833 .proc_handler
= proc_dointvec
,
1836 .procname
= "backup_only",
1837 .maxlen
= sizeof(int),
1839 .proc_handler
= proc_dointvec
,
1842 .procname
= "conn_reuse_mode",
1843 .maxlen
= sizeof(int),
1845 .proc_handler
= proc_dointvec
,
1847 #ifdef CONFIG_IP_VS_DEBUG
1849 .procname
= "debug_level",
1850 .data
= &sysctl_ip_vs_debug_level
,
1851 .maxlen
= sizeof(int),
1853 .proc_handler
= proc_dointvec
,
1861 #ifdef CONFIG_PROC_FS
1864 struct seq_net_private p
; /* Do not move this, netns depends upon it*/
1865 struct hlist_head
*table
;
1870 * Write the contents of the VS rule table to a PROCfs file.
1871 * (It is kept just for backward compatibility)
1873 static inline const char *ip_vs_fwd_name(unsigned int flags
)
1875 switch (flags
& IP_VS_CONN_F_FWD_MASK
) {
1876 case IP_VS_CONN_F_LOCALNODE
:
1878 case IP_VS_CONN_F_TUNNEL
:
1880 case IP_VS_CONN_F_DROUTE
:
1888 /* Get the Nth entry in the two lists */
1889 static struct ip_vs_service
*ip_vs_info_array(struct seq_file
*seq
, loff_t pos
)
1891 struct net
*net
= seq_file_net(seq
);
1892 struct ip_vs_iter
*iter
= seq
->private;
1894 struct ip_vs_service
*svc
;
1896 /* look in hash by protocol */
1897 for (idx
= 0; idx
< IP_VS_SVC_TAB_SIZE
; idx
++) {
1898 hlist_for_each_entry_rcu(svc
, &ip_vs_svc_table
[idx
], s_list
) {
1899 if (net_eq(svc
->net
, net
) && pos
-- == 0) {
1900 iter
->table
= ip_vs_svc_table
;
1907 /* keep looking in fwmark */
1908 for (idx
= 0; idx
< IP_VS_SVC_TAB_SIZE
; idx
++) {
1909 hlist_for_each_entry_rcu(svc
, &ip_vs_svc_fwm_table
[idx
],
1911 if (net_eq(svc
->net
, net
) && pos
-- == 0) {
1912 iter
->table
= ip_vs_svc_fwm_table
;
1922 static void *ip_vs_info_seq_start(struct seq_file
*seq
, loff_t
*pos
)
1926 return *pos
? ip_vs_info_array(seq
, *pos
- 1) : SEQ_START_TOKEN
;
1930 static void *ip_vs_info_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
1932 struct hlist_node
*e
;
1933 struct ip_vs_iter
*iter
;
1934 struct ip_vs_service
*svc
;
1937 if (v
== SEQ_START_TOKEN
)
1938 return ip_vs_info_array(seq
,0);
1941 iter
= seq
->private;
1943 if (iter
->table
== ip_vs_svc_table
) {
1944 /* next service in table hashed by protocol */
1945 e
= rcu_dereference(hlist_next_rcu(&svc
->s_list
));
1947 return hlist_entry(e
, struct ip_vs_service
, s_list
);
1949 while (++iter
->bucket
< IP_VS_SVC_TAB_SIZE
) {
1950 hlist_for_each_entry_rcu(svc
,
1951 &ip_vs_svc_table
[iter
->bucket
],
1957 iter
->table
= ip_vs_svc_fwm_table
;
1962 /* next service in hashed by fwmark */
1963 e
= rcu_dereference(hlist_next_rcu(&svc
->f_list
));
1965 return hlist_entry(e
, struct ip_vs_service
, f_list
);
1968 while (++iter
->bucket
< IP_VS_SVC_TAB_SIZE
) {
1969 hlist_for_each_entry_rcu(svc
,
1970 &ip_vs_svc_fwm_table
[iter
->bucket
],
1978 static void ip_vs_info_seq_stop(struct seq_file
*seq
, void *v
)
1985 static int ip_vs_info_seq_show(struct seq_file
*seq
, void *v
)
1987 if (v
== SEQ_START_TOKEN
) {
1989 "IP Virtual Server version %d.%d.%d (size=%d)\n",
1990 NVERSION(IP_VS_VERSION_CODE
), ip_vs_conn_tab_size
);
1992 "Prot LocalAddress:Port Scheduler Flags\n");
1994 " -> RemoteAddress:Port Forward Weight ActiveConn InActConn\n");
1996 const struct ip_vs_service
*svc
= v
;
1997 const struct ip_vs_iter
*iter
= seq
->private;
1998 const struct ip_vs_dest
*dest
;
1999 struct ip_vs_scheduler
*sched
= rcu_dereference(svc
->scheduler
);
2000 char *sched_name
= sched
? sched
->name
: "none";
2002 if (iter
->table
== ip_vs_svc_table
) {
2003 #ifdef CONFIG_IP_VS_IPV6
2004 if (svc
->af
== AF_INET6
)
2005 seq_printf(seq
, "%s [%pI6]:%04X %s ",
2006 ip_vs_proto_name(svc
->protocol
),
2012 seq_printf(seq
, "%s %08X:%04X %s %s ",
2013 ip_vs_proto_name(svc
->protocol
),
2014 ntohl(svc
->addr
.ip
),
2017 (svc
->flags
& IP_VS_SVC_F_ONEPACKET
)?"ops ":"");
2019 seq_printf(seq
, "FWM %08X %s %s",
2020 svc
->fwmark
, sched_name
,
2021 (svc
->flags
& IP_VS_SVC_F_ONEPACKET
)?"ops ":"");
2024 if (svc
->flags
& IP_VS_SVC_F_PERSISTENT
)
2025 seq_printf(seq
, "persistent %d %08X\n",
2027 ntohl(svc
->netmask
));
2029 seq_putc(seq
, '\n');
2031 list_for_each_entry_rcu(dest
, &svc
->destinations
, n_list
) {
2032 #ifdef CONFIG_IP_VS_IPV6
2033 if (dest
->af
== AF_INET6
)
2036 " %-7s %-6d %-10d %-10d\n",
2039 ip_vs_fwd_name(atomic_read(&dest
->conn_flags
)),
2040 atomic_read(&dest
->weight
),
2041 atomic_read(&dest
->activeconns
),
2042 atomic_read(&dest
->inactconns
));
2047 "%-7s %-6d %-10d %-10d\n",
2048 ntohl(dest
->addr
.ip
),
2050 ip_vs_fwd_name(atomic_read(&dest
->conn_flags
)),
2051 atomic_read(&dest
->weight
),
2052 atomic_read(&dest
->activeconns
),
2053 atomic_read(&dest
->inactconns
));
2060 static const struct seq_operations ip_vs_info_seq_ops
= {
2061 .start
= ip_vs_info_seq_start
,
2062 .next
= ip_vs_info_seq_next
,
2063 .stop
= ip_vs_info_seq_stop
,
2064 .show
= ip_vs_info_seq_show
,
2067 static int ip_vs_info_open(struct inode
*inode
, struct file
*file
)
2069 return seq_open_net(inode
, file
, &ip_vs_info_seq_ops
,
2070 sizeof(struct ip_vs_iter
));
2073 static const struct file_operations ip_vs_info_fops
= {
2074 .owner
= THIS_MODULE
,
2075 .open
= ip_vs_info_open
,
2077 .llseek
= seq_lseek
,
2078 .release
= seq_release_net
,
2081 static int ip_vs_stats_show(struct seq_file
*seq
, void *v
)
2083 struct net
*net
= seq_file_single_net(seq
);
2084 struct ip_vs_kstats show
;
2086 /* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2088 " Total Incoming Outgoing Incoming Outgoing\n");
2090 " Conns Packets Packets Bytes Bytes\n");
2092 ip_vs_copy_stats(&show
, &net_ipvs(net
)->tot_stats
);
2093 seq_printf(seq
, "%8LX %8LX %8LX %16LX %16LX\n\n",
2094 (unsigned long long)show
.conns
,
2095 (unsigned long long)show
.inpkts
,
2096 (unsigned long long)show
.outpkts
,
2097 (unsigned long long)show
.inbytes
,
2098 (unsigned long long)show
.outbytes
);
2100 /* 01234567 01234567 01234567 0123456701234567 0123456701234567*/
2102 " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
2103 seq_printf(seq
, "%8LX %8LX %8LX %16LX %16LX\n",
2104 (unsigned long long)show
.cps
,
2105 (unsigned long long)show
.inpps
,
2106 (unsigned long long)show
.outpps
,
2107 (unsigned long long)show
.inbps
,
2108 (unsigned long long)show
.outbps
);
2113 static int ip_vs_stats_seq_open(struct inode
*inode
, struct file
*file
)
2115 return single_open_net(inode
, file
, ip_vs_stats_show
);
2118 static const struct file_operations ip_vs_stats_fops
= {
2119 .owner
= THIS_MODULE
,
2120 .open
= ip_vs_stats_seq_open
,
2122 .llseek
= seq_lseek
,
2123 .release
= single_release_net
,
2126 static int ip_vs_stats_percpu_show(struct seq_file
*seq
, void *v
)
2128 struct net
*net
= seq_file_single_net(seq
);
2129 struct ip_vs_stats
*tot_stats
= &net_ipvs(net
)->tot_stats
;
2130 struct ip_vs_cpu_stats __percpu
*cpustats
= tot_stats
->cpustats
;
2131 struct ip_vs_kstats kstats
;
2134 /* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2136 " Total Incoming Outgoing Incoming Outgoing\n");
2138 "CPU Conns Packets Packets Bytes Bytes\n");
2140 for_each_possible_cpu(i
) {
2141 struct ip_vs_cpu_stats
*u
= per_cpu_ptr(cpustats
, i
);
2143 u64 conns
, inpkts
, outpkts
, inbytes
, outbytes
;
2146 start
= u64_stats_fetch_begin_irq(&u
->syncp
);
2147 conns
= u
->cnt
.conns
;
2148 inpkts
= u
->cnt
.inpkts
;
2149 outpkts
= u
->cnt
.outpkts
;
2150 inbytes
= u
->cnt
.inbytes
;
2151 outbytes
= u
->cnt
.outbytes
;
2152 } while (u64_stats_fetch_retry_irq(&u
->syncp
, start
));
2154 seq_printf(seq
, "%3X %8LX %8LX %8LX %16LX %16LX\n",
2155 i
, (u64
)conns
, (u64
)inpkts
,
2156 (u64
)outpkts
, (u64
)inbytes
,
2160 ip_vs_copy_stats(&kstats
, tot_stats
);
2162 seq_printf(seq
, " ~ %8LX %8LX %8LX %16LX %16LX\n\n",
2163 (unsigned long long)kstats
.conns
,
2164 (unsigned long long)kstats
.inpkts
,
2165 (unsigned long long)kstats
.outpkts
,
2166 (unsigned long long)kstats
.inbytes
,
2167 (unsigned long long)kstats
.outbytes
);
2169 /* ... 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2171 " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
2172 seq_printf(seq
, " %8LX %8LX %8LX %16LX %16LX\n",
2182 static int ip_vs_stats_percpu_seq_open(struct inode
*inode
, struct file
*file
)
2184 return single_open_net(inode
, file
, ip_vs_stats_percpu_show
);
2187 static const struct file_operations ip_vs_stats_percpu_fops
= {
2188 .owner
= THIS_MODULE
,
2189 .open
= ip_vs_stats_percpu_seq_open
,
2191 .llseek
= seq_lseek
,
2192 .release
= single_release_net
,
2197 * Set timeout values for tcp tcpfin udp in the timeout_table.
2199 static int ip_vs_set_timeout(struct net
*net
, struct ip_vs_timeout_user
*u
)
2201 #if defined(CONFIG_IP_VS_PROTO_TCP) || defined(CONFIG_IP_VS_PROTO_UDP)
2202 struct ip_vs_proto_data
*pd
;
2205 IP_VS_DBG(2, "Setting timeout tcp:%d tcpfin:%d udp:%d\n",
2210 #ifdef CONFIG_IP_VS_PROTO_TCP
2211 if (u
->tcp_timeout
) {
2212 pd
= ip_vs_proto_data_get(net
, IPPROTO_TCP
);
2213 pd
->timeout_table
[IP_VS_TCP_S_ESTABLISHED
]
2214 = u
->tcp_timeout
* HZ
;
2217 if (u
->tcp_fin_timeout
) {
2218 pd
= ip_vs_proto_data_get(net
, IPPROTO_TCP
);
2219 pd
->timeout_table
[IP_VS_TCP_S_FIN_WAIT
]
2220 = u
->tcp_fin_timeout
* HZ
;
2224 #ifdef CONFIG_IP_VS_PROTO_UDP
2225 if (u
->udp_timeout
) {
2226 pd
= ip_vs_proto_data_get(net
, IPPROTO_UDP
);
2227 pd
->timeout_table
[IP_VS_UDP_S_NORMAL
]
2228 = u
->udp_timeout
* HZ
;
2234 #define CMDID(cmd) (cmd - IP_VS_BASE_CTL)
2236 struct ip_vs_svcdest_user
{
2237 struct ip_vs_service_user s
;
2238 struct ip_vs_dest_user d
;
2241 static const unsigned char set_arglen
[CMDID(IP_VS_SO_SET_MAX
) + 1] = {
2242 [CMDID(IP_VS_SO_SET_ADD
)] = sizeof(struct ip_vs_service_user
),
2243 [CMDID(IP_VS_SO_SET_EDIT
)] = sizeof(struct ip_vs_service_user
),
2244 [CMDID(IP_VS_SO_SET_DEL
)] = sizeof(struct ip_vs_service_user
),
2245 [CMDID(IP_VS_SO_SET_ADDDEST
)] = sizeof(struct ip_vs_svcdest_user
),
2246 [CMDID(IP_VS_SO_SET_DELDEST
)] = sizeof(struct ip_vs_svcdest_user
),
2247 [CMDID(IP_VS_SO_SET_EDITDEST
)] = sizeof(struct ip_vs_svcdest_user
),
2248 [CMDID(IP_VS_SO_SET_TIMEOUT
)] = sizeof(struct ip_vs_timeout_user
),
2249 [CMDID(IP_VS_SO_SET_STARTDAEMON
)] = sizeof(struct ip_vs_daemon_user
),
2250 [CMDID(IP_VS_SO_SET_STOPDAEMON
)] = sizeof(struct ip_vs_daemon_user
),
2251 [CMDID(IP_VS_SO_SET_ZERO
)] = sizeof(struct ip_vs_service_user
),
2254 union ip_vs_set_arglen
{
2255 struct ip_vs_service_user field_IP_VS_SO_SET_ADD
;
2256 struct ip_vs_service_user field_IP_VS_SO_SET_EDIT
;
2257 struct ip_vs_service_user field_IP_VS_SO_SET_DEL
;
2258 struct ip_vs_svcdest_user field_IP_VS_SO_SET_ADDDEST
;
2259 struct ip_vs_svcdest_user field_IP_VS_SO_SET_DELDEST
;
2260 struct ip_vs_svcdest_user field_IP_VS_SO_SET_EDITDEST
;
2261 struct ip_vs_timeout_user field_IP_VS_SO_SET_TIMEOUT
;
2262 struct ip_vs_daemon_user field_IP_VS_SO_SET_STARTDAEMON
;
2263 struct ip_vs_daemon_user field_IP_VS_SO_SET_STOPDAEMON
;
2264 struct ip_vs_service_user field_IP_VS_SO_SET_ZERO
;
2267 #define MAX_SET_ARGLEN sizeof(union ip_vs_set_arglen)
2269 static void ip_vs_copy_usvc_compat(struct ip_vs_service_user_kern
*usvc
,
2270 struct ip_vs_service_user
*usvc_compat
)
2272 memset(usvc
, 0, sizeof(*usvc
));
2275 usvc
->protocol
= usvc_compat
->protocol
;
2276 usvc
->addr
.ip
= usvc_compat
->addr
;
2277 usvc
->port
= usvc_compat
->port
;
2278 usvc
->fwmark
= usvc_compat
->fwmark
;
2280 /* Deep copy of sched_name is not needed here */
2281 usvc
->sched_name
= usvc_compat
->sched_name
;
2283 usvc
->flags
= usvc_compat
->flags
;
2284 usvc
->timeout
= usvc_compat
->timeout
;
2285 usvc
->netmask
= usvc_compat
->netmask
;
2288 static void ip_vs_copy_udest_compat(struct ip_vs_dest_user_kern
*udest
,
2289 struct ip_vs_dest_user
*udest_compat
)
2291 memset(udest
, 0, sizeof(*udest
));
2293 udest
->addr
.ip
= udest_compat
->addr
;
2294 udest
->port
= udest_compat
->port
;
2295 udest
->conn_flags
= udest_compat
->conn_flags
;
2296 udest
->weight
= udest_compat
->weight
;
2297 udest
->u_threshold
= udest_compat
->u_threshold
;
2298 udest
->l_threshold
= udest_compat
->l_threshold
;
2299 udest
->af
= AF_INET
;
2303 do_ip_vs_set_ctl(struct sock
*sk
, int cmd
, void __user
*user
, unsigned int len
)
2305 struct net
*net
= sock_net(sk
);
2307 unsigned char arg
[MAX_SET_ARGLEN
];
2308 struct ip_vs_service_user
*usvc_compat
;
2309 struct ip_vs_service_user_kern usvc
;
2310 struct ip_vs_service
*svc
;
2311 struct ip_vs_dest_user
*udest_compat
;
2312 struct ip_vs_dest_user_kern udest
;
2313 struct netns_ipvs
*ipvs
= net_ipvs(net
);
2315 BUILD_BUG_ON(sizeof(arg
) > 255);
2316 if (!ns_capable(sock_net(sk
)->user_ns
, CAP_NET_ADMIN
))
2319 if (cmd
< IP_VS_BASE_CTL
|| cmd
> IP_VS_SO_SET_MAX
)
2321 if (len
!= set_arglen
[CMDID(cmd
)]) {
2322 IP_VS_DBG(1, "set_ctl: len %u != %u\n",
2323 len
, set_arglen
[CMDID(cmd
)]);
2327 if (copy_from_user(arg
, user
, len
) != 0)
2330 /* increase the module use count */
2331 ip_vs_use_count_inc();
2333 /* Handle daemons since they have another lock */
2334 if (cmd
== IP_VS_SO_SET_STARTDAEMON
||
2335 cmd
== IP_VS_SO_SET_STOPDAEMON
) {
2336 struct ip_vs_daemon_user
*dm
= (struct ip_vs_daemon_user
*)arg
;
2338 if (cmd
== IP_VS_SO_SET_STARTDAEMON
) {
2339 struct ipvs_sync_daemon_cfg cfg
;
2341 memset(&cfg
, 0, sizeof(cfg
));
2342 strlcpy(cfg
.mcast_ifn
, dm
->mcast_ifn
,
2343 sizeof(cfg
.mcast_ifn
));
2344 cfg
.syncid
= dm
->syncid
;
2346 mutex_lock(&ipvs
->sync_mutex
);
2347 ret
= start_sync_thread(net
, &cfg
, dm
->state
);
2348 mutex_unlock(&ipvs
->sync_mutex
);
2351 mutex_lock(&ipvs
->sync_mutex
);
2352 ret
= stop_sync_thread(net
, dm
->state
);
2353 mutex_unlock(&ipvs
->sync_mutex
);
2358 mutex_lock(&__ip_vs_mutex
);
2359 if (cmd
== IP_VS_SO_SET_FLUSH
) {
2360 /* Flush the virtual service */
2361 ret
= ip_vs_flush(net
, false);
2363 } else if (cmd
== IP_VS_SO_SET_TIMEOUT
) {
2364 /* Set timeout values for (tcp tcpfin udp) */
2365 ret
= ip_vs_set_timeout(net
, (struct ip_vs_timeout_user
*)arg
);
2369 usvc_compat
= (struct ip_vs_service_user
*)arg
;
2370 udest_compat
= (struct ip_vs_dest_user
*)(usvc_compat
+ 1);
2372 /* We only use the new structs internally, so copy userspace compat
2373 * structs to extended internal versions */
2374 ip_vs_copy_usvc_compat(&usvc
, usvc_compat
);
2375 ip_vs_copy_udest_compat(&udest
, udest_compat
);
2377 if (cmd
== IP_VS_SO_SET_ZERO
) {
2378 /* if no service address is set, zero counters in all */
2379 if (!usvc
.fwmark
&& !usvc
.addr
.ip
&& !usvc
.port
) {
2380 ret
= ip_vs_zero_all(net
);
2385 /* Check for valid protocol: TCP or UDP or SCTP, even for fwmark!=0 */
2386 if (usvc
.protocol
!= IPPROTO_TCP
&& usvc
.protocol
!= IPPROTO_UDP
&&
2387 usvc
.protocol
!= IPPROTO_SCTP
) {
2388 pr_err("set_ctl: invalid protocol: %d %pI4:%d %s\n",
2389 usvc
.protocol
, &usvc
.addr
.ip
,
2390 ntohs(usvc
.port
), usvc
.sched_name
);
2395 /* Lookup the exact service by <protocol, addr, port> or fwmark */
2397 if (usvc
.fwmark
== 0)
2398 svc
= __ip_vs_service_find(net
, usvc
.af
, usvc
.protocol
,
2399 &usvc
.addr
, usvc
.port
);
2401 svc
= __ip_vs_svc_fwm_find(net
, usvc
.af
, usvc
.fwmark
);
2404 if (cmd
!= IP_VS_SO_SET_ADD
2405 && (svc
== NULL
|| svc
->protocol
!= usvc
.protocol
)) {
2411 case IP_VS_SO_SET_ADD
:
2415 ret
= ip_vs_add_service(net
, &usvc
, &svc
);
2417 case IP_VS_SO_SET_EDIT
:
2418 ret
= ip_vs_edit_service(svc
, &usvc
);
2420 case IP_VS_SO_SET_DEL
:
2421 ret
= ip_vs_del_service(svc
);
2425 case IP_VS_SO_SET_ZERO
:
2426 ret
= ip_vs_zero_service(svc
);
2428 case IP_VS_SO_SET_ADDDEST
:
2429 ret
= ip_vs_add_dest(svc
, &udest
);
2431 case IP_VS_SO_SET_EDITDEST
:
2432 ret
= ip_vs_edit_dest(svc
, &udest
);
2434 case IP_VS_SO_SET_DELDEST
:
2435 ret
= ip_vs_del_dest(svc
, &udest
);
2442 mutex_unlock(&__ip_vs_mutex
);
2444 /* decrease the module use count */
2445 ip_vs_use_count_dec();
2452 ip_vs_copy_service(struct ip_vs_service_entry
*dst
, struct ip_vs_service
*src
)
2454 struct ip_vs_scheduler
*sched
;
2455 struct ip_vs_kstats kstats
;
2458 sched
= rcu_dereference_protected(src
->scheduler
, 1);
2459 sched_name
= sched
? sched
->name
: "none";
2460 dst
->protocol
= src
->protocol
;
2461 dst
->addr
= src
->addr
.ip
;
2462 dst
->port
= src
->port
;
2463 dst
->fwmark
= src
->fwmark
;
2464 strlcpy(dst
->sched_name
, sched_name
, sizeof(dst
->sched_name
));
2465 dst
->flags
= src
->flags
;
2466 dst
->timeout
= src
->timeout
/ HZ
;
2467 dst
->netmask
= src
->netmask
;
2468 dst
->num_dests
= src
->num_dests
;
2469 ip_vs_copy_stats(&kstats
, &src
->stats
);
2470 ip_vs_export_stats_user(&dst
->stats
, &kstats
);
2474 __ip_vs_get_service_entries(struct net
*net
,
2475 const struct ip_vs_get_services
*get
,
2476 struct ip_vs_get_services __user
*uptr
)
2479 struct ip_vs_service
*svc
;
2480 struct ip_vs_service_entry entry
;
2483 for (idx
= 0; idx
< IP_VS_SVC_TAB_SIZE
; idx
++) {
2484 hlist_for_each_entry(svc
, &ip_vs_svc_table
[idx
], s_list
) {
2485 /* Only expose IPv4 entries to old interface */
2486 if (svc
->af
!= AF_INET
|| !net_eq(svc
->net
, net
))
2489 if (count
>= get
->num_services
)
2491 memset(&entry
, 0, sizeof(entry
));
2492 ip_vs_copy_service(&entry
, svc
);
2493 if (copy_to_user(&uptr
->entrytable
[count
],
2494 &entry
, sizeof(entry
))) {
2502 for (idx
= 0; idx
< IP_VS_SVC_TAB_SIZE
; idx
++) {
2503 hlist_for_each_entry(svc
, &ip_vs_svc_fwm_table
[idx
], f_list
) {
2504 /* Only expose IPv4 entries to old interface */
2505 if (svc
->af
!= AF_INET
|| !net_eq(svc
->net
, net
))
2508 if (count
>= get
->num_services
)
2510 memset(&entry
, 0, sizeof(entry
));
2511 ip_vs_copy_service(&entry
, svc
);
2512 if (copy_to_user(&uptr
->entrytable
[count
],
2513 &entry
, sizeof(entry
))) {
2525 __ip_vs_get_dest_entries(struct net
*net
, const struct ip_vs_get_dests
*get
,
2526 struct ip_vs_get_dests __user
*uptr
)
2528 struct ip_vs_service
*svc
;
2529 union nf_inet_addr addr
= { .ip
= get
->addr
};
2534 svc
= __ip_vs_svc_fwm_find(net
, AF_INET
, get
->fwmark
);
2536 svc
= __ip_vs_service_find(net
, AF_INET
, get
->protocol
, &addr
,
2542 struct ip_vs_dest
*dest
;
2543 struct ip_vs_dest_entry entry
;
2544 struct ip_vs_kstats kstats
;
2546 memset(&entry
, 0, sizeof(entry
));
2547 list_for_each_entry(dest
, &svc
->destinations
, n_list
) {
2548 if (count
>= get
->num_dests
)
2551 /* Cannot expose heterogeneous members via sockopt
2554 if (dest
->af
!= svc
->af
)
2557 entry
.addr
= dest
->addr
.ip
;
2558 entry
.port
= dest
->port
;
2559 entry
.conn_flags
= atomic_read(&dest
->conn_flags
);
2560 entry
.weight
= atomic_read(&dest
->weight
);
2561 entry
.u_threshold
= dest
->u_threshold
;
2562 entry
.l_threshold
= dest
->l_threshold
;
2563 entry
.activeconns
= atomic_read(&dest
->activeconns
);
2564 entry
.inactconns
= atomic_read(&dest
->inactconns
);
2565 entry
.persistconns
= atomic_read(&dest
->persistconns
);
2566 ip_vs_copy_stats(&kstats
, &dest
->stats
);
2567 ip_vs_export_stats_user(&entry
.stats
, &kstats
);
2568 if (copy_to_user(&uptr
->entrytable
[count
],
2569 &entry
, sizeof(entry
))) {
2581 __ip_vs_get_timeouts(struct net
*net
, struct ip_vs_timeout_user
*u
)
2583 #if defined(CONFIG_IP_VS_PROTO_TCP) || defined(CONFIG_IP_VS_PROTO_UDP)
2584 struct ip_vs_proto_data
*pd
;
2587 memset(u
, 0, sizeof (*u
));
2589 #ifdef CONFIG_IP_VS_PROTO_TCP
2590 pd
= ip_vs_proto_data_get(net
, IPPROTO_TCP
);
2591 u
->tcp_timeout
= pd
->timeout_table
[IP_VS_TCP_S_ESTABLISHED
] / HZ
;
2592 u
->tcp_fin_timeout
= pd
->timeout_table
[IP_VS_TCP_S_FIN_WAIT
] / HZ
;
2594 #ifdef CONFIG_IP_VS_PROTO_UDP
2595 pd
= ip_vs_proto_data_get(net
, IPPROTO_UDP
);
2597 pd
->timeout_table
[IP_VS_UDP_S_NORMAL
] / HZ
;
2601 static const unsigned char get_arglen
[CMDID(IP_VS_SO_GET_MAX
) + 1] = {
2602 [CMDID(IP_VS_SO_GET_VERSION
)] = 64,
2603 [CMDID(IP_VS_SO_GET_INFO
)] = sizeof(struct ip_vs_getinfo
),
2604 [CMDID(IP_VS_SO_GET_SERVICES
)] = sizeof(struct ip_vs_get_services
),
2605 [CMDID(IP_VS_SO_GET_SERVICE
)] = sizeof(struct ip_vs_service_entry
),
2606 [CMDID(IP_VS_SO_GET_DESTS
)] = sizeof(struct ip_vs_get_dests
),
2607 [CMDID(IP_VS_SO_GET_TIMEOUT
)] = sizeof(struct ip_vs_timeout_user
),
2608 [CMDID(IP_VS_SO_GET_DAEMON
)] = 2 * sizeof(struct ip_vs_daemon_user
),
2611 union ip_vs_get_arglen
{
2612 char field_IP_VS_SO_GET_VERSION
[64];
2613 struct ip_vs_getinfo field_IP_VS_SO_GET_INFO
;
2614 struct ip_vs_get_services field_IP_VS_SO_GET_SERVICES
;
2615 struct ip_vs_service_entry field_IP_VS_SO_GET_SERVICE
;
2616 struct ip_vs_get_dests field_IP_VS_SO_GET_DESTS
;
2617 struct ip_vs_timeout_user field_IP_VS_SO_GET_TIMEOUT
;
2618 struct ip_vs_daemon_user field_IP_VS_SO_GET_DAEMON
[2];
2621 #define MAX_GET_ARGLEN sizeof(union ip_vs_get_arglen)
2624 do_ip_vs_get_ctl(struct sock
*sk
, int cmd
, void __user
*user
, int *len
)
2626 unsigned char arg
[MAX_GET_ARGLEN
];
2628 unsigned int copylen
;
2629 struct net
*net
= sock_net(sk
);
2630 struct netns_ipvs
*ipvs
= net_ipvs(net
);
2633 BUILD_BUG_ON(sizeof(arg
) > 255);
2634 if (!ns_capable(sock_net(sk
)->user_ns
, CAP_NET_ADMIN
))
2637 if (cmd
< IP_VS_BASE_CTL
|| cmd
> IP_VS_SO_GET_MAX
)
2640 copylen
= get_arglen
[CMDID(cmd
)];
2641 if (*len
< (int) copylen
) {
2642 IP_VS_DBG(1, "get_ctl: len %d < %u\n", *len
, copylen
);
2646 if (copy_from_user(arg
, user
, copylen
) != 0)
2649 * Handle daemons first since it has its own locking
2651 if (cmd
== IP_VS_SO_GET_DAEMON
) {
2652 struct ip_vs_daemon_user d
[2];
2654 memset(&d
, 0, sizeof(d
));
2655 mutex_lock(&ipvs
->sync_mutex
);
2656 if (ipvs
->sync_state
& IP_VS_STATE_MASTER
) {
2657 d
[0].state
= IP_VS_STATE_MASTER
;
2658 strlcpy(d
[0].mcast_ifn
, ipvs
->mcfg
.mcast_ifn
,
2659 sizeof(d
[0].mcast_ifn
));
2660 d
[0].syncid
= ipvs
->mcfg
.syncid
;
2662 if (ipvs
->sync_state
& IP_VS_STATE_BACKUP
) {
2663 d
[1].state
= IP_VS_STATE_BACKUP
;
2664 strlcpy(d
[1].mcast_ifn
, ipvs
->bcfg
.mcast_ifn
,
2665 sizeof(d
[1].mcast_ifn
));
2666 d
[1].syncid
= ipvs
->bcfg
.syncid
;
2668 if (copy_to_user(user
, &d
, sizeof(d
)) != 0)
2670 mutex_unlock(&ipvs
->sync_mutex
);
2674 mutex_lock(&__ip_vs_mutex
);
2676 case IP_VS_SO_GET_VERSION
:
2680 sprintf(buf
, "IP Virtual Server version %d.%d.%d (size=%d)",
2681 NVERSION(IP_VS_VERSION_CODE
), ip_vs_conn_tab_size
);
2682 if (copy_to_user(user
, buf
, strlen(buf
)+1) != 0) {
2686 *len
= strlen(buf
)+1;
2690 case IP_VS_SO_GET_INFO
:
2692 struct ip_vs_getinfo info
;
2693 info
.version
= IP_VS_VERSION_CODE
;
2694 info
.size
= ip_vs_conn_tab_size
;
2695 info
.num_services
= ipvs
->num_services
;
2696 if (copy_to_user(user
, &info
, sizeof(info
)) != 0)
2701 case IP_VS_SO_GET_SERVICES
:
2703 struct ip_vs_get_services
*get
;
2706 get
= (struct ip_vs_get_services
*)arg
;
2707 size
= sizeof(*get
) +
2708 sizeof(struct ip_vs_service_entry
) * get
->num_services
;
2710 pr_err("length: %u != %u\n", *len
, size
);
2714 ret
= __ip_vs_get_service_entries(net
, get
, user
);
2718 case IP_VS_SO_GET_SERVICE
:
2720 struct ip_vs_service_entry
*entry
;
2721 struct ip_vs_service
*svc
;
2722 union nf_inet_addr addr
;
2724 entry
= (struct ip_vs_service_entry
*)arg
;
2725 addr
.ip
= entry
->addr
;
2728 svc
= __ip_vs_svc_fwm_find(net
, AF_INET
, entry
->fwmark
);
2730 svc
= __ip_vs_service_find(net
, AF_INET
,
2731 entry
->protocol
, &addr
,
2735 ip_vs_copy_service(entry
, svc
);
2736 if (copy_to_user(user
, entry
, sizeof(*entry
)) != 0)
2743 case IP_VS_SO_GET_DESTS
:
2745 struct ip_vs_get_dests
*get
;
2748 get
= (struct ip_vs_get_dests
*)arg
;
2749 size
= sizeof(*get
) +
2750 sizeof(struct ip_vs_dest_entry
) * get
->num_dests
;
2752 pr_err("length: %u != %u\n", *len
, size
);
2756 ret
= __ip_vs_get_dest_entries(net
, get
, user
);
2760 case IP_VS_SO_GET_TIMEOUT
:
2762 struct ip_vs_timeout_user t
;
2764 __ip_vs_get_timeouts(net
, &t
);
2765 if (copy_to_user(user
, &t
, sizeof(t
)) != 0)
2775 mutex_unlock(&__ip_vs_mutex
);
2780 static struct nf_sockopt_ops ip_vs_sockopts
= {
2782 .set_optmin
= IP_VS_BASE_CTL
,
2783 .set_optmax
= IP_VS_SO_SET_MAX
+1,
2784 .set
= do_ip_vs_set_ctl
,
2785 .get_optmin
= IP_VS_BASE_CTL
,
2786 .get_optmax
= IP_VS_SO_GET_MAX
+1,
2787 .get
= do_ip_vs_get_ctl
,
2788 .owner
= THIS_MODULE
,
2792 * Generic Netlink interface
2795 /* IPVS genetlink family */
2796 static struct genl_family ip_vs_genl_family
= {
2797 .id
= GENL_ID_GENERATE
,
2799 .name
= IPVS_GENL_NAME
,
2800 .version
= IPVS_GENL_VERSION
,
2801 .maxattr
= IPVS_CMD_MAX
,
2802 .netnsok
= true, /* Make ipvsadm to work on netns */
2805 /* Policy used for first-level command attributes */
2806 static const struct nla_policy ip_vs_cmd_policy
[IPVS_CMD_ATTR_MAX
+ 1] = {
2807 [IPVS_CMD_ATTR_SERVICE
] = { .type
= NLA_NESTED
},
2808 [IPVS_CMD_ATTR_DEST
] = { .type
= NLA_NESTED
},
2809 [IPVS_CMD_ATTR_DAEMON
] = { .type
= NLA_NESTED
},
2810 [IPVS_CMD_ATTR_TIMEOUT_TCP
] = { .type
= NLA_U32
},
2811 [IPVS_CMD_ATTR_TIMEOUT_TCP_FIN
] = { .type
= NLA_U32
},
2812 [IPVS_CMD_ATTR_TIMEOUT_UDP
] = { .type
= NLA_U32
},
2815 /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DAEMON */
2816 static const struct nla_policy ip_vs_daemon_policy
[IPVS_DAEMON_ATTR_MAX
+ 1] = {
2817 [IPVS_DAEMON_ATTR_STATE
] = { .type
= NLA_U32
},
2818 [IPVS_DAEMON_ATTR_MCAST_IFN
] = { .type
= NLA_NUL_STRING
,
2819 .len
= IP_VS_IFNAME_MAXLEN
},
2820 [IPVS_DAEMON_ATTR_SYNC_ID
] = { .type
= NLA_U32
},
2821 [IPVS_DAEMON_ATTR_SYNC_MAXLEN
] = { .type
= NLA_U16
},
2822 [IPVS_DAEMON_ATTR_MCAST_GROUP
] = { .type
= NLA_U32
},
2823 [IPVS_DAEMON_ATTR_MCAST_GROUP6
] = { .len
= sizeof(struct in6_addr
) },
2824 [IPVS_DAEMON_ATTR_MCAST_PORT
] = { .type
= NLA_U16
},
2825 [IPVS_DAEMON_ATTR_MCAST_TTL
] = { .type
= NLA_U8
},
2828 /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_SERVICE */
2829 static const struct nla_policy ip_vs_svc_policy
[IPVS_SVC_ATTR_MAX
+ 1] = {
2830 [IPVS_SVC_ATTR_AF
] = { .type
= NLA_U16
},
2831 [IPVS_SVC_ATTR_PROTOCOL
] = { .type
= NLA_U16
},
2832 [IPVS_SVC_ATTR_ADDR
] = { .type
= NLA_BINARY
,
2833 .len
= sizeof(union nf_inet_addr
) },
2834 [IPVS_SVC_ATTR_PORT
] = { .type
= NLA_U16
},
2835 [IPVS_SVC_ATTR_FWMARK
] = { .type
= NLA_U32
},
2836 [IPVS_SVC_ATTR_SCHED_NAME
] = { .type
= NLA_NUL_STRING
,
2837 .len
= IP_VS_SCHEDNAME_MAXLEN
},
2838 [IPVS_SVC_ATTR_PE_NAME
] = { .type
= NLA_NUL_STRING
,
2839 .len
= IP_VS_PENAME_MAXLEN
},
2840 [IPVS_SVC_ATTR_FLAGS
] = { .type
= NLA_BINARY
,
2841 .len
= sizeof(struct ip_vs_flags
) },
2842 [IPVS_SVC_ATTR_TIMEOUT
] = { .type
= NLA_U32
},
2843 [IPVS_SVC_ATTR_NETMASK
] = { .type
= NLA_U32
},
2844 [IPVS_SVC_ATTR_STATS
] = { .type
= NLA_NESTED
},
2847 /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DEST */
2848 static const struct nla_policy ip_vs_dest_policy
[IPVS_DEST_ATTR_MAX
+ 1] = {
2849 [IPVS_DEST_ATTR_ADDR
] = { .type
= NLA_BINARY
,
2850 .len
= sizeof(union nf_inet_addr
) },
2851 [IPVS_DEST_ATTR_PORT
] = { .type
= NLA_U16
},
2852 [IPVS_DEST_ATTR_FWD_METHOD
] = { .type
= NLA_U32
},
2853 [IPVS_DEST_ATTR_WEIGHT
] = { .type
= NLA_U32
},
2854 [IPVS_DEST_ATTR_U_THRESH
] = { .type
= NLA_U32
},
2855 [IPVS_DEST_ATTR_L_THRESH
] = { .type
= NLA_U32
},
2856 [IPVS_DEST_ATTR_ACTIVE_CONNS
] = { .type
= NLA_U32
},
2857 [IPVS_DEST_ATTR_INACT_CONNS
] = { .type
= NLA_U32
},
2858 [IPVS_DEST_ATTR_PERSIST_CONNS
] = { .type
= NLA_U32
},
2859 [IPVS_DEST_ATTR_STATS
] = { .type
= NLA_NESTED
},
2860 [IPVS_DEST_ATTR_ADDR_FAMILY
] = { .type
= NLA_U16
},
2863 static int ip_vs_genl_fill_stats(struct sk_buff
*skb
, int container_type
,
2864 struct ip_vs_kstats
*kstats
)
2866 struct nlattr
*nl_stats
= nla_nest_start(skb
, container_type
);
2871 if (nla_put_u32(skb
, IPVS_STATS_ATTR_CONNS
, (u32
)kstats
->conns
) ||
2872 nla_put_u32(skb
, IPVS_STATS_ATTR_INPKTS
, (u32
)kstats
->inpkts
) ||
2873 nla_put_u32(skb
, IPVS_STATS_ATTR_OUTPKTS
, (u32
)kstats
->outpkts
) ||
2874 nla_put_u64(skb
, IPVS_STATS_ATTR_INBYTES
, kstats
->inbytes
) ||
2875 nla_put_u64(skb
, IPVS_STATS_ATTR_OUTBYTES
, kstats
->outbytes
) ||
2876 nla_put_u32(skb
, IPVS_STATS_ATTR_CPS
, (u32
)kstats
->cps
) ||
2877 nla_put_u32(skb
, IPVS_STATS_ATTR_INPPS
, (u32
)kstats
->inpps
) ||
2878 nla_put_u32(skb
, IPVS_STATS_ATTR_OUTPPS
, (u32
)kstats
->outpps
) ||
2879 nla_put_u32(skb
, IPVS_STATS_ATTR_INBPS
, (u32
)kstats
->inbps
) ||
2880 nla_put_u32(skb
, IPVS_STATS_ATTR_OUTBPS
, (u32
)kstats
->outbps
))
2881 goto nla_put_failure
;
2882 nla_nest_end(skb
, nl_stats
);
2887 nla_nest_cancel(skb
, nl_stats
);
2891 static int ip_vs_genl_fill_stats64(struct sk_buff
*skb
, int container_type
,
2892 struct ip_vs_kstats
*kstats
)
2894 struct nlattr
*nl_stats
= nla_nest_start(skb
, container_type
);
2899 if (nla_put_u64(skb
, IPVS_STATS_ATTR_CONNS
, kstats
->conns
) ||
2900 nla_put_u64(skb
, IPVS_STATS_ATTR_INPKTS
, kstats
->inpkts
) ||
2901 nla_put_u64(skb
, IPVS_STATS_ATTR_OUTPKTS
, kstats
->outpkts
) ||
2902 nla_put_u64(skb
, IPVS_STATS_ATTR_INBYTES
, kstats
->inbytes
) ||
2903 nla_put_u64(skb
, IPVS_STATS_ATTR_OUTBYTES
, kstats
->outbytes
) ||
2904 nla_put_u64(skb
, IPVS_STATS_ATTR_CPS
, kstats
->cps
) ||
2905 nla_put_u64(skb
, IPVS_STATS_ATTR_INPPS
, kstats
->inpps
) ||
2906 nla_put_u64(skb
, IPVS_STATS_ATTR_OUTPPS
, kstats
->outpps
) ||
2907 nla_put_u64(skb
, IPVS_STATS_ATTR_INBPS
, kstats
->inbps
) ||
2908 nla_put_u64(skb
, IPVS_STATS_ATTR_OUTBPS
, kstats
->outbps
))
2909 goto nla_put_failure
;
2910 nla_nest_end(skb
, nl_stats
);
2915 nla_nest_cancel(skb
, nl_stats
);
2919 static int ip_vs_genl_fill_service(struct sk_buff
*skb
,
2920 struct ip_vs_service
*svc
)
2922 struct ip_vs_scheduler
*sched
;
2923 struct ip_vs_pe
*pe
;
2924 struct nlattr
*nl_service
;
2925 struct ip_vs_flags flags
= { .flags
= svc
->flags
,
2927 struct ip_vs_kstats kstats
;
2930 nl_service
= nla_nest_start(skb
, IPVS_CMD_ATTR_SERVICE
);
2934 if (nla_put_u16(skb
, IPVS_SVC_ATTR_AF
, svc
->af
))
2935 goto nla_put_failure
;
2937 if (nla_put_u32(skb
, IPVS_SVC_ATTR_FWMARK
, svc
->fwmark
))
2938 goto nla_put_failure
;
2940 if (nla_put_u16(skb
, IPVS_SVC_ATTR_PROTOCOL
, svc
->protocol
) ||
2941 nla_put(skb
, IPVS_SVC_ATTR_ADDR
, sizeof(svc
->addr
), &svc
->addr
) ||
2942 nla_put_be16(skb
, IPVS_SVC_ATTR_PORT
, svc
->port
))
2943 goto nla_put_failure
;
2946 sched
= rcu_dereference_protected(svc
->scheduler
, 1);
2947 sched_name
= sched
? sched
->name
: "none";
2948 pe
= rcu_dereference_protected(svc
->pe
, 1);
2949 if (nla_put_string(skb
, IPVS_SVC_ATTR_SCHED_NAME
, sched_name
) ||
2950 (pe
&& nla_put_string(skb
, IPVS_SVC_ATTR_PE_NAME
, pe
->name
)) ||
2951 nla_put(skb
, IPVS_SVC_ATTR_FLAGS
, sizeof(flags
), &flags
) ||
2952 nla_put_u32(skb
, IPVS_SVC_ATTR_TIMEOUT
, svc
->timeout
/ HZ
) ||
2953 nla_put_be32(skb
, IPVS_SVC_ATTR_NETMASK
, svc
->netmask
))
2954 goto nla_put_failure
;
2955 ip_vs_copy_stats(&kstats
, &svc
->stats
);
2956 if (ip_vs_genl_fill_stats(skb
, IPVS_SVC_ATTR_STATS
, &kstats
))
2957 goto nla_put_failure
;
2958 if (ip_vs_genl_fill_stats64(skb
, IPVS_SVC_ATTR_STATS64
, &kstats
))
2959 goto nla_put_failure
;
2961 nla_nest_end(skb
, nl_service
);
2966 nla_nest_cancel(skb
, nl_service
);
2970 static int ip_vs_genl_dump_service(struct sk_buff
*skb
,
2971 struct ip_vs_service
*svc
,
2972 struct netlink_callback
*cb
)
2976 hdr
= genlmsg_put(skb
, NETLINK_CB(cb
->skb
).portid
, cb
->nlh
->nlmsg_seq
,
2977 &ip_vs_genl_family
, NLM_F_MULTI
,
2978 IPVS_CMD_NEW_SERVICE
);
2982 if (ip_vs_genl_fill_service(skb
, svc
) < 0)
2983 goto nla_put_failure
;
2985 genlmsg_end(skb
, hdr
);
2989 genlmsg_cancel(skb
, hdr
);
2993 static int ip_vs_genl_dump_services(struct sk_buff
*skb
,
2994 struct netlink_callback
*cb
)
2997 int start
= cb
->args
[0];
2998 struct ip_vs_service
*svc
;
2999 struct net
*net
= skb_sknet(skb
);
3001 mutex_lock(&__ip_vs_mutex
);
3002 for (i
= 0; i
< IP_VS_SVC_TAB_SIZE
; i
++) {
3003 hlist_for_each_entry(svc
, &ip_vs_svc_table
[i
], s_list
) {
3004 if (++idx
<= start
|| !net_eq(svc
->net
, net
))
3006 if (ip_vs_genl_dump_service(skb
, svc
, cb
) < 0) {
3008 goto nla_put_failure
;
3013 for (i
= 0; i
< IP_VS_SVC_TAB_SIZE
; i
++) {
3014 hlist_for_each_entry(svc
, &ip_vs_svc_fwm_table
[i
], f_list
) {
3015 if (++idx
<= start
|| !net_eq(svc
->net
, net
))
3017 if (ip_vs_genl_dump_service(skb
, svc
, cb
) < 0) {
3019 goto nla_put_failure
;
3025 mutex_unlock(&__ip_vs_mutex
);
3031 static int ip_vs_genl_parse_service(struct net
*net
,
3032 struct ip_vs_service_user_kern
*usvc
,
3033 struct nlattr
*nla
, int full_entry
,
3034 struct ip_vs_service
**ret_svc
)
3036 struct nlattr
*attrs
[IPVS_SVC_ATTR_MAX
+ 1];
3037 struct nlattr
*nla_af
, *nla_port
, *nla_fwmark
, *nla_protocol
, *nla_addr
;
3038 struct ip_vs_service
*svc
;
3040 /* Parse mandatory identifying service fields first */
3042 nla_parse_nested(attrs
, IPVS_SVC_ATTR_MAX
, nla
, ip_vs_svc_policy
))
3045 nla_af
= attrs
[IPVS_SVC_ATTR_AF
];
3046 nla_protocol
= attrs
[IPVS_SVC_ATTR_PROTOCOL
];
3047 nla_addr
= attrs
[IPVS_SVC_ATTR_ADDR
];
3048 nla_port
= attrs
[IPVS_SVC_ATTR_PORT
];
3049 nla_fwmark
= attrs
[IPVS_SVC_ATTR_FWMARK
];
3051 if (!(nla_af
&& (nla_fwmark
|| (nla_port
&& nla_protocol
&& nla_addr
))))
3054 memset(usvc
, 0, sizeof(*usvc
));
3056 usvc
->af
= nla_get_u16(nla_af
);
3057 #ifdef CONFIG_IP_VS_IPV6
3058 if (usvc
->af
!= AF_INET
&& usvc
->af
!= AF_INET6
)
3060 if (usvc
->af
!= AF_INET
)
3062 return -EAFNOSUPPORT
;
3065 usvc
->protocol
= IPPROTO_TCP
;
3066 usvc
->fwmark
= nla_get_u32(nla_fwmark
);
3068 usvc
->protocol
= nla_get_u16(nla_protocol
);
3069 nla_memcpy(&usvc
->addr
, nla_addr
, sizeof(usvc
->addr
));
3070 usvc
->port
= nla_get_be16(nla_port
);
3076 svc
= __ip_vs_svc_fwm_find(net
, usvc
->af
, usvc
->fwmark
);
3078 svc
= __ip_vs_service_find(net
, usvc
->af
, usvc
->protocol
,
3079 &usvc
->addr
, usvc
->port
);
3083 /* If a full entry was requested, check for the additional fields */
3085 struct nlattr
*nla_sched
, *nla_flags
, *nla_pe
, *nla_timeout
,
3087 struct ip_vs_flags flags
;
3089 nla_sched
= attrs
[IPVS_SVC_ATTR_SCHED_NAME
];
3090 nla_pe
= attrs
[IPVS_SVC_ATTR_PE_NAME
];
3091 nla_flags
= attrs
[IPVS_SVC_ATTR_FLAGS
];
3092 nla_timeout
= attrs
[IPVS_SVC_ATTR_TIMEOUT
];
3093 nla_netmask
= attrs
[IPVS_SVC_ATTR_NETMASK
];
3095 if (!(nla_sched
&& nla_flags
&& nla_timeout
&& nla_netmask
))
3098 nla_memcpy(&flags
, nla_flags
, sizeof(flags
));
3100 /* prefill flags from service if it already exists */
3102 usvc
->flags
= svc
->flags
;
3104 /* set new flags from userland */
3105 usvc
->flags
= (usvc
->flags
& ~flags
.mask
) |
3106 (flags
.flags
& flags
.mask
);
3107 usvc
->sched_name
= nla_data(nla_sched
);
3108 usvc
->pe_name
= nla_pe
? nla_data(nla_pe
) : NULL
;
3109 usvc
->timeout
= nla_get_u32(nla_timeout
);
3110 usvc
->netmask
= nla_get_be32(nla_netmask
);
3116 static struct ip_vs_service
*ip_vs_genl_find_service(struct net
*net
,
3119 struct ip_vs_service_user_kern usvc
;
3120 struct ip_vs_service
*svc
;
3123 ret
= ip_vs_genl_parse_service(net
, &usvc
, nla
, 0, &svc
);
3124 return ret
? ERR_PTR(ret
) : svc
;
3127 static int ip_vs_genl_fill_dest(struct sk_buff
*skb
, struct ip_vs_dest
*dest
)
3129 struct nlattr
*nl_dest
;
3130 struct ip_vs_kstats kstats
;
3132 nl_dest
= nla_nest_start(skb
, IPVS_CMD_ATTR_DEST
);
3136 if (nla_put(skb
, IPVS_DEST_ATTR_ADDR
, sizeof(dest
->addr
), &dest
->addr
) ||
3137 nla_put_be16(skb
, IPVS_DEST_ATTR_PORT
, dest
->port
) ||
3138 nla_put_u32(skb
, IPVS_DEST_ATTR_FWD_METHOD
,
3139 (atomic_read(&dest
->conn_flags
) &
3140 IP_VS_CONN_F_FWD_MASK
)) ||
3141 nla_put_u32(skb
, IPVS_DEST_ATTR_WEIGHT
,
3142 atomic_read(&dest
->weight
)) ||
3143 nla_put_u32(skb
, IPVS_DEST_ATTR_U_THRESH
, dest
->u_threshold
) ||
3144 nla_put_u32(skb
, IPVS_DEST_ATTR_L_THRESH
, dest
->l_threshold
) ||
3145 nla_put_u32(skb
, IPVS_DEST_ATTR_ACTIVE_CONNS
,
3146 atomic_read(&dest
->activeconns
)) ||
3147 nla_put_u32(skb
, IPVS_DEST_ATTR_INACT_CONNS
,
3148 atomic_read(&dest
->inactconns
)) ||
3149 nla_put_u32(skb
, IPVS_DEST_ATTR_PERSIST_CONNS
,
3150 atomic_read(&dest
->persistconns
)) ||
3151 nla_put_u16(skb
, IPVS_DEST_ATTR_ADDR_FAMILY
, dest
->af
))
3152 goto nla_put_failure
;
3153 ip_vs_copy_stats(&kstats
, &dest
->stats
);
3154 if (ip_vs_genl_fill_stats(skb
, IPVS_DEST_ATTR_STATS
, &kstats
))
3155 goto nla_put_failure
;
3156 if (ip_vs_genl_fill_stats64(skb
, IPVS_DEST_ATTR_STATS64
, &kstats
))
3157 goto nla_put_failure
;
3159 nla_nest_end(skb
, nl_dest
);
3164 nla_nest_cancel(skb
, nl_dest
);
3168 static int ip_vs_genl_dump_dest(struct sk_buff
*skb
, struct ip_vs_dest
*dest
,
3169 struct netlink_callback
*cb
)
3173 hdr
= genlmsg_put(skb
, NETLINK_CB(cb
->skb
).portid
, cb
->nlh
->nlmsg_seq
,
3174 &ip_vs_genl_family
, NLM_F_MULTI
,
3179 if (ip_vs_genl_fill_dest(skb
, dest
) < 0)
3180 goto nla_put_failure
;
3182 genlmsg_end(skb
, hdr
);
3186 genlmsg_cancel(skb
, hdr
);
3190 static int ip_vs_genl_dump_dests(struct sk_buff
*skb
,
3191 struct netlink_callback
*cb
)
3194 int start
= cb
->args
[0];
3195 struct ip_vs_service
*svc
;
3196 struct ip_vs_dest
*dest
;
3197 struct nlattr
*attrs
[IPVS_CMD_ATTR_MAX
+ 1];
3198 struct net
*net
= skb_sknet(skb
);
3200 mutex_lock(&__ip_vs_mutex
);
3202 /* Try to find the service for which to dump destinations */
3203 if (nlmsg_parse(cb
->nlh
, GENL_HDRLEN
, attrs
,
3204 IPVS_CMD_ATTR_MAX
, ip_vs_cmd_policy
))
3208 svc
= ip_vs_genl_find_service(net
, attrs
[IPVS_CMD_ATTR_SERVICE
]);
3209 if (IS_ERR(svc
) || svc
== NULL
)
3212 /* Dump the destinations */
3213 list_for_each_entry(dest
, &svc
->destinations
, n_list
) {
3216 if (ip_vs_genl_dump_dest(skb
, dest
, cb
) < 0) {
3218 goto nla_put_failure
;
3226 mutex_unlock(&__ip_vs_mutex
);
3231 static int ip_vs_genl_parse_dest(struct ip_vs_dest_user_kern
*udest
,
3232 struct nlattr
*nla
, int full_entry
)
3234 struct nlattr
*attrs
[IPVS_DEST_ATTR_MAX
+ 1];
3235 struct nlattr
*nla_addr
, *nla_port
;
3236 struct nlattr
*nla_addr_family
;
3238 /* Parse mandatory identifying destination fields first */
3240 nla_parse_nested(attrs
, IPVS_DEST_ATTR_MAX
, nla
, ip_vs_dest_policy
))
3243 nla_addr
= attrs
[IPVS_DEST_ATTR_ADDR
];
3244 nla_port
= attrs
[IPVS_DEST_ATTR_PORT
];
3245 nla_addr_family
= attrs
[IPVS_DEST_ATTR_ADDR_FAMILY
];
3247 if (!(nla_addr
&& nla_port
))
3250 memset(udest
, 0, sizeof(*udest
));
3252 nla_memcpy(&udest
->addr
, nla_addr
, sizeof(udest
->addr
));
3253 udest
->port
= nla_get_be16(nla_port
);
3255 if (nla_addr_family
)
3256 udest
->af
= nla_get_u16(nla_addr_family
);
3260 /* If a full entry was requested, check for the additional fields */
3262 struct nlattr
*nla_fwd
, *nla_weight
, *nla_u_thresh
,
3265 nla_fwd
= attrs
[IPVS_DEST_ATTR_FWD_METHOD
];
3266 nla_weight
= attrs
[IPVS_DEST_ATTR_WEIGHT
];
3267 nla_u_thresh
= attrs
[IPVS_DEST_ATTR_U_THRESH
];
3268 nla_l_thresh
= attrs
[IPVS_DEST_ATTR_L_THRESH
];
3270 if (!(nla_fwd
&& nla_weight
&& nla_u_thresh
&& nla_l_thresh
))
3273 udest
->conn_flags
= nla_get_u32(nla_fwd
)
3274 & IP_VS_CONN_F_FWD_MASK
;
3275 udest
->weight
= nla_get_u32(nla_weight
);
3276 udest
->u_threshold
= nla_get_u32(nla_u_thresh
);
3277 udest
->l_threshold
= nla_get_u32(nla_l_thresh
);
3283 static int ip_vs_genl_fill_daemon(struct sk_buff
*skb
, __u32 state
,
3284 struct ipvs_sync_daemon_cfg
*c
)
3286 struct nlattr
*nl_daemon
;
3288 nl_daemon
= nla_nest_start(skb
, IPVS_CMD_ATTR_DAEMON
);
3292 if (nla_put_u32(skb
, IPVS_DAEMON_ATTR_STATE
, state
) ||
3293 nla_put_string(skb
, IPVS_DAEMON_ATTR_MCAST_IFN
, c
->mcast_ifn
) ||
3294 nla_put_u32(skb
, IPVS_DAEMON_ATTR_SYNC_ID
, c
->syncid
) ||
3295 nla_put_u16(skb
, IPVS_DAEMON_ATTR_SYNC_MAXLEN
, c
->sync_maxlen
) ||
3296 nla_put_u16(skb
, IPVS_DAEMON_ATTR_MCAST_PORT
, c
->mcast_port
) ||
3297 nla_put_u8(skb
, IPVS_DAEMON_ATTR_MCAST_TTL
, c
->mcast_ttl
))
3298 goto nla_put_failure
;
3299 #ifdef CONFIG_IP_VS_IPV6
3300 if (c
->mcast_af
== AF_INET6
) {
3301 if (nla_put_in6_addr(skb
, IPVS_DAEMON_ATTR_MCAST_GROUP6
,
3302 &c
->mcast_group
.in6
))
3303 goto nla_put_failure
;
3306 if (c
->mcast_af
== AF_INET
&&
3307 nla_put_in_addr(skb
, IPVS_DAEMON_ATTR_MCAST_GROUP
,
3309 goto nla_put_failure
;
3310 nla_nest_end(skb
, nl_daemon
);
3315 nla_nest_cancel(skb
, nl_daemon
);
3319 static int ip_vs_genl_dump_daemon(struct sk_buff
*skb
, __u32 state
,
3320 struct ipvs_sync_daemon_cfg
*c
,
3321 struct netlink_callback
*cb
)
3324 hdr
= genlmsg_put(skb
, NETLINK_CB(cb
->skb
).portid
, cb
->nlh
->nlmsg_seq
,
3325 &ip_vs_genl_family
, NLM_F_MULTI
,
3326 IPVS_CMD_NEW_DAEMON
);
3330 if (ip_vs_genl_fill_daemon(skb
, state
, c
))
3331 goto nla_put_failure
;
3333 genlmsg_end(skb
, hdr
);
3337 genlmsg_cancel(skb
, hdr
);
3341 static int ip_vs_genl_dump_daemons(struct sk_buff
*skb
,
3342 struct netlink_callback
*cb
)
3344 struct net
*net
= skb_sknet(skb
);
3345 struct netns_ipvs
*ipvs
= net_ipvs(net
);
3347 mutex_lock(&ipvs
->sync_mutex
);
3348 if ((ipvs
->sync_state
& IP_VS_STATE_MASTER
) && !cb
->args
[0]) {
3349 if (ip_vs_genl_dump_daemon(skb
, IP_VS_STATE_MASTER
,
3350 &ipvs
->mcfg
, cb
) < 0)
3351 goto nla_put_failure
;
3356 if ((ipvs
->sync_state
& IP_VS_STATE_BACKUP
) && !cb
->args
[1]) {
3357 if (ip_vs_genl_dump_daemon(skb
, IP_VS_STATE_BACKUP
,
3358 &ipvs
->bcfg
, cb
) < 0)
3359 goto nla_put_failure
;
3365 mutex_unlock(&ipvs
->sync_mutex
);
3370 static int ip_vs_genl_new_daemon(struct net
*net
, struct nlattr
**attrs
)
3372 struct netns_ipvs
*ipvs
= net_ipvs(net
);
3373 struct ipvs_sync_daemon_cfg c
;
3377 memset(&c
, 0, sizeof(c
));
3378 if (!(attrs
[IPVS_DAEMON_ATTR_STATE
] &&
3379 attrs
[IPVS_DAEMON_ATTR_MCAST_IFN
] &&
3380 attrs
[IPVS_DAEMON_ATTR_SYNC_ID
]))
3382 strlcpy(c
.mcast_ifn
, nla_data(attrs
[IPVS_DAEMON_ATTR_MCAST_IFN
]),
3383 sizeof(c
.mcast_ifn
));
3384 c
.syncid
= nla_get_u32(attrs
[IPVS_DAEMON_ATTR_SYNC_ID
]);
3386 a
= attrs
[IPVS_DAEMON_ATTR_SYNC_MAXLEN
];
3388 c
.sync_maxlen
= nla_get_u16(a
);
3390 a
= attrs
[IPVS_DAEMON_ATTR_MCAST_GROUP
];
3392 c
.mcast_af
= AF_INET
;
3393 c
.mcast_group
.ip
= nla_get_in_addr(a
);
3394 if (!ipv4_is_multicast(c
.mcast_group
.ip
))
3397 a
= attrs
[IPVS_DAEMON_ATTR_MCAST_GROUP6
];
3399 #ifdef CONFIG_IP_VS_IPV6
3402 c
.mcast_af
= AF_INET6
;
3403 c
.mcast_group
.in6
= nla_get_in6_addr(a
);
3404 addr_type
= ipv6_addr_type(&c
.mcast_group
.in6
);
3405 if (!(addr_type
& IPV6_ADDR_MULTICAST
))
3408 return -EAFNOSUPPORT
;
3413 a
= attrs
[IPVS_DAEMON_ATTR_MCAST_PORT
];
3415 c
.mcast_port
= nla_get_u16(a
);
3417 a
= attrs
[IPVS_DAEMON_ATTR_MCAST_TTL
];
3419 c
.mcast_ttl
= nla_get_u8(a
);
3421 /* The synchronization protocol is incompatible with mixed family
3424 if (ipvs
->mixed_address_family_dests
> 0)
3428 mutex_lock(&ipvs
->sync_mutex
);
3429 ret
= start_sync_thread(net
, &c
,
3430 nla_get_u32(attrs
[IPVS_DAEMON_ATTR_STATE
]));
3431 mutex_unlock(&ipvs
->sync_mutex
);
3436 static int ip_vs_genl_del_daemon(struct net
*net
, struct nlattr
**attrs
)
3438 struct netns_ipvs
*ipvs
= net_ipvs(net
);
3441 if (!attrs
[IPVS_DAEMON_ATTR_STATE
])
3444 mutex_lock(&ipvs
->sync_mutex
);
3445 ret
= stop_sync_thread(net
,
3446 nla_get_u32(attrs
[IPVS_DAEMON_ATTR_STATE
]));
3447 mutex_unlock(&ipvs
->sync_mutex
);
3451 static int ip_vs_genl_set_config(struct net
*net
, struct nlattr
**attrs
)
3453 struct ip_vs_timeout_user t
;
3455 __ip_vs_get_timeouts(net
, &t
);
3457 if (attrs
[IPVS_CMD_ATTR_TIMEOUT_TCP
])
3458 t
.tcp_timeout
= nla_get_u32(attrs
[IPVS_CMD_ATTR_TIMEOUT_TCP
]);
3460 if (attrs
[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN
])
3462 nla_get_u32(attrs
[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN
]);
3464 if (attrs
[IPVS_CMD_ATTR_TIMEOUT_UDP
])
3465 t
.udp_timeout
= nla_get_u32(attrs
[IPVS_CMD_ATTR_TIMEOUT_UDP
]);
3467 return ip_vs_set_timeout(net
, &t
);
3470 static int ip_vs_genl_set_daemon(struct sk_buff
*skb
, struct genl_info
*info
)
3472 int ret
= -EINVAL
, cmd
;
3474 struct netns_ipvs
*ipvs
;
3476 net
= skb_sknet(skb
);
3477 ipvs
= net_ipvs(net
);
3478 cmd
= info
->genlhdr
->cmd
;
3480 if (cmd
== IPVS_CMD_NEW_DAEMON
|| cmd
== IPVS_CMD_DEL_DAEMON
) {
3481 struct nlattr
*daemon_attrs
[IPVS_DAEMON_ATTR_MAX
+ 1];
3483 if (!info
->attrs
[IPVS_CMD_ATTR_DAEMON
] ||
3484 nla_parse_nested(daemon_attrs
, IPVS_DAEMON_ATTR_MAX
,
3485 info
->attrs
[IPVS_CMD_ATTR_DAEMON
],
3486 ip_vs_daemon_policy
))
3489 if (cmd
== IPVS_CMD_NEW_DAEMON
)
3490 ret
= ip_vs_genl_new_daemon(net
, daemon_attrs
);
3492 ret
= ip_vs_genl_del_daemon(net
, daemon_attrs
);
3499 static int ip_vs_genl_set_cmd(struct sk_buff
*skb
, struct genl_info
*info
)
3501 struct ip_vs_service
*svc
= NULL
;
3502 struct ip_vs_service_user_kern usvc
;
3503 struct ip_vs_dest_user_kern udest
;
3505 int need_full_svc
= 0, need_full_dest
= 0;
3508 net
= skb_sknet(skb
);
3509 cmd
= info
->genlhdr
->cmd
;
3511 mutex_lock(&__ip_vs_mutex
);
3513 if (cmd
== IPVS_CMD_FLUSH
) {
3514 ret
= ip_vs_flush(net
, false);
3516 } else if (cmd
== IPVS_CMD_SET_CONFIG
) {
3517 ret
= ip_vs_genl_set_config(net
, info
->attrs
);
3519 } else if (cmd
== IPVS_CMD_ZERO
&&
3520 !info
->attrs
[IPVS_CMD_ATTR_SERVICE
]) {
3521 ret
= ip_vs_zero_all(net
);
3525 /* All following commands require a service argument, so check if we
3526 * received a valid one. We need a full service specification when
3527 * adding / editing a service. Only identifying members otherwise. */
3528 if (cmd
== IPVS_CMD_NEW_SERVICE
|| cmd
== IPVS_CMD_SET_SERVICE
)
3531 ret
= ip_vs_genl_parse_service(net
, &usvc
,
3532 info
->attrs
[IPVS_CMD_ATTR_SERVICE
],
3533 need_full_svc
, &svc
);
3537 /* Unless we're adding a new service, the service must already exist */
3538 if ((cmd
!= IPVS_CMD_NEW_SERVICE
) && (svc
== NULL
)) {
3543 /* Destination commands require a valid destination argument. For
3544 * adding / editing a destination, we need a full destination
3546 if (cmd
== IPVS_CMD_NEW_DEST
|| cmd
== IPVS_CMD_SET_DEST
||
3547 cmd
== IPVS_CMD_DEL_DEST
) {
3548 if (cmd
!= IPVS_CMD_DEL_DEST
)
3551 ret
= ip_vs_genl_parse_dest(&udest
,
3552 info
->attrs
[IPVS_CMD_ATTR_DEST
],
3557 /* Old protocols did not allow the user to specify address
3558 * family, so we set it to zero instead. We also didn't
3559 * allow heterogeneous pools in the old code, so it's safe
3560 * to assume that this will have the same address family as
3566 if (udest
.af
!= svc
->af
&& cmd
!= IPVS_CMD_DEL_DEST
) {
3567 /* The synchronization protocol is incompatible
3568 * with mixed family services
3570 if (net_ipvs(net
)->sync_state
) {
3575 /* Which connection types do we support? */
3576 switch (udest
.conn_flags
) {
3577 case IP_VS_CONN_F_TUNNEL
:
3578 /* We are able to forward this */
3588 case IPVS_CMD_NEW_SERVICE
:
3590 ret
= ip_vs_add_service(net
, &usvc
, &svc
);
3594 case IPVS_CMD_SET_SERVICE
:
3595 ret
= ip_vs_edit_service(svc
, &usvc
);
3597 case IPVS_CMD_DEL_SERVICE
:
3598 ret
= ip_vs_del_service(svc
);
3599 /* do not use svc, it can be freed */
3601 case IPVS_CMD_NEW_DEST
:
3602 ret
= ip_vs_add_dest(svc
, &udest
);
3604 case IPVS_CMD_SET_DEST
:
3605 ret
= ip_vs_edit_dest(svc
, &udest
);
3607 case IPVS_CMD_DEL_DEST
:
3608 ret
= ip_vs_del_dest(svc
, &udest
);
3611 ret
= ip_vs_zero_service(svc
);
3618 mutex_unlock(&__ip_vs_mutex
);
3623 static int ip_vs_genl_get_cmd(struct sk_buff
*skb
, struct genl_info
*info
)
3625 struct sk_buff
*msg
;
3627 int ret
, cmd
, reply_cmd
;
3630 net
= skb_sknet(skb
);
3631 cmd
= info
->genlhdr
->cmd
;
3633 if (cmd
== IPVS_CMD_GET_SERVICE
)
3634 reply_cmd
= IPVS_CMD_NEW_SERVICE
;
3635 else if (cmd
== IPVS_CMD_GET_INFO
)
3636 reply_cmd
= IPVS_CMD_SET_INFO
;
3637 else if (cmd
== IPVS_CMD_GET_CONFIG
)
3638 reply_cmd
= IPVS_CMD_SET_CONFIG
;
3640 pr_err("unknown Generic Netlink command\n");
3644 msg
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
3648 mutex_lock(&__ip_vs_mutex
);
3650 reply
= genlmsg_put_reply(msg
, info
, &ip_vs_genl_family
, 0, reply_cmd
);
3652 goto nla_put_failure
;
3655 case IPVS_CMD_GET_SERVICE
:
3657 struct ip_vs_service
*svc
;
3659 svc
= ip_vs_genl_find_service(net
,
3660 info
->attrs
[IPVS_CMD_ATTR_SERVICE
]);
3665 ret
= ip_vs_genl_fill_service(msg
, svc
);
3667 goto nla_put_failure
;
3676 case IPVS_CMD_GET_CONFIG
:
3678 struct ip_vs_timeout_user t
;
3680 __ip_vs_get_timeouts(net
, &t
);
3681 #ifdef CONFIG_IP_VS_PROTO_TCP
3682 if (nla_put_u32(msg
, IPVS_CMD_ATTR_TIMEOUT_TCP
,
3684 nla_put_u32(msg
, IPVS_CMD_ATTR_TIMEOUT_TCP_FIN
,
3686 goto nla_put_failure
;
3688 #ifdef CONFIG_IP_VS_PROTO_UDP
3689 if (nla_put_u32(msg
, IPVS_CMD_ATTR_TIMEOUT_UDP
, t
.udp_timeout
))
3690 goto nla_put_failure
;
3696 case IPVS_CMD_GET_INFO
:
3697 if (nla_put_u32(msg
, IPVS_INFO_ATTR_VERSION
,
3698 IP_VS_VERSION_CODE
) ||
3699 nla_put_u32(msg
, IPVS_INFO_ATTR_CONN_TAB_SIZE
,
3700 ip_vs_conn_tab_size
))
3701 goto nla_put_failure
;
3705 genlmsg_end(msg
, reply
);
3706 ret
= genlmsg_reply(msg
, info
);
3710 pr_err("not enough space in Netlink message\n");
3716 mutex_unlock(&__ip_vs_mutex
);
3722 static const struct genl_ops ip_vs_genl_ops
[] = {
3724 .cmd
= IPVS_CMD_NEW_SERVICE
,
3725 .flags
= GENL_ADMIN_PERM
,
3726 .policy
= ip_vs_cmd_policy
,
3727 .doit
= ip_vs_genl_set_cmd
,
3730 .cmd
= IPVS_CMD_SET_SERVICE
,
3731 .flags
= GENL_ADMIN_PERM
,
3732 .policy
= ip_vs_cmd_policy
,
3733 .doit
= ip_vs_genl_set_cmd
,
3736 .cmd
= IPVS_CMD_DEL_SERVICE
,
3737 .flags
= GENL_ADMIN_PERM
,
3738 .policy
= ip_vs_cmd_policy
,
3739 .doit
= ip_vs_genl_set_cmd
,
3742 .cmd
= IPVS_CMD_GET_SERVICE
,
3743 .flags
= GENL_ADMIN_PERM
,
3744 .doit
= ip_vs_genl_get_cmd
,
3745 .dumpit
= ip_vs_genl_dump_services
,
3746 .policy
= ip_vs_cmd_policy
,
3749 .cmd
= IPVS_CMD_NEW_DEST
,
3750 .flags
= GENL_ADMIN_PERM
,
3751 .policy
= ip_vs_cmd_policy
,
3752 .doit
= ip_vs_genl_set_cmd
,
3755 .cmd
= IPVS_CMD_SET_DEST
,
3756 .flags
= GENL_ADMIN_PERM
,
3757 .policy
= ip_vs_cmd_policy
,
3758 .doit
= ip_vs_genl_set_cmd
,
3761 .cmd
= IPVS_CMD_DEL_DEST
,
3762 .flags
= GENL_ADMIN_PERM
,
3763 .policy
= ip_vs_cmd_policy
,
3764 .doit
= ip_vs_genl_set_cmd
,
3767 .cmd
= IPVS_CMD_GET_DEST
,
3768 .flags
= GENL_ADMIN_PERM
,
3769 .policy
= ip_vs_cmd_policy
,
3770 .dumpit
= ip_vs_genl_dump_dests
,
3773 .cmd
= IPVS_CMD_NEW_DAEMON
,
3774 .flags
= GENL_ADMIN_PERM
,
3775 .policy
= ip_vs_cmd_policy
,
3776 .doit
= ip_vs_genl_set_daemon
,
3779 .cmd
= IPVS_CMD_DEL_DAEMON
,
3780 .flags
= GENL_ADMIN_PERM
,
3781 .policy
= ip_vs_cmd_policy
,
3782 .doit
= ip_vs_genl_set_daemon
,
3785 .cmd
= IPVS_CMD_GET_DAEMON
,
3786 .flags
= GENL_ADMIN_PERM
,
3787 .dumpit
= ip_vs_genl_dump_daemons
,
3790 .cmd
= IPVS_CMD_SET_CONFIG
,
3791 .flags
= GENL_ADMIN_PERM
,
3792 .policy
= ip_vs_cmd_policy
,
3793 .doit
= ip_vs_genl_set_cmd
,
3796 .cmd
= IPVS_CMD_GET_CONFIG
,
3797 .flags
= GENL_ADMIN_PERM
,
3798 .doit
= ip_vs_genl_get_cmd
,
3801 .cmd
= IPVS_CMD_GET_INFO
,
3802 .flags
= GENL_ADMIN_PERM
,
3803 .doit
= ip_vs_genl_get_cmd
,
3806 .cmd
= IPVS_CMD_ZERO
,
3807 .flags
= GENL_ADMIN_PERM
,
3808 .policy
= ip_vs_cmd_policy
,
3809 .doit
= ip_vs_genl_set_cmd
,
3812 .cmd
= IPVS_CMD_FLUSH
,
3813 .flags
= GENL_ADMIN_PERM
,
3814 .doit
= ip_vs_genl_set_cmd
,
3818 static int __init
ip_vs_genl_register(void)
3820 return genl_register_family_with_ops(&ip_vs_genl_family
,
3824 static void ip_vs_genl_unregister(void)
3826 genl_unregister_family(&ip_vs_genl_family
);
3829 /* End of Generic Netlink interface definitions */
3832 * per netns intit/exit func.
3834 #ifdef CONFIG_SYSCTL
3835 static int __net_init
ip_vs_control_net_init_sysctl(struct net
*net
)
3838 struct netns_ipvs
*ipvs
= net_ipvs(net
);
3839 struct ctl_table
*tbl
;
3841 atomic_set(&ipvs
->dropentry
, 0);
3842 spin_lock_init(&ipvs
->dropentry_lock
);
3843 spin_lock_init(&ipvs
->droppacket_lock
);
3844 spin_lock_init(&ipvs
->securetcp_lock
);
3846 if (!net_eq(net
, &init_net
)) {
3847 tbl
= kmemdup(vs_vars
, sizeof(vs_vars
), GFP_KERNEL
);
3851 /* Don't export sysctls to unprivileged users */
3852 if (net
->user_ns
!= &init_user_ns
)
3853 tbl
[0].procname
= NULL
;
3856 /* Initialize sysctl defaults */
3858 ipvs
->sysctl_amemthresh
= 1024;
3859 tbl
[idx
++].data
= &ipvs
->sysctl_amemthresh
;
3860 ipvs
->sysctl_am_droprate
= 10;
3861 tbl
[idx
++].data
= &ipvs
->sysctl_am_droprate
;
3862 tbl
[idx
++].data
= &ipvs
->sysctl_drop_entry
;
3863 tbl
[idx
++].data
= &ipvs
->sysctl_drop_packet
;
3864 #ifdef CONFIG_IP_VS_NFCT
3865 tbl
[idx
++].data
= &ipvs
->sysctl_conntrack
;
3867 tbl
[idx
++].data
= &ipvs
->sysctl_secure_tcp
;
3868 ipvs
->sysctl_snat_reroute
= 1;
3869 tbl
[idx
++].data
= &ipvs
->sysctl_snat_reroute
;
3870 ipvs
->sysctl_sync_ver
= 1;
3871 tbl
[idx
++].data
= &ipvs
->sysctl_sync_ver
;
3872 ipvs
->sysctl_sync_ports
= 1;
3873 tbl
[idx
++].data
= &ipvs
->sysctl_sync_ports
;
3874 tbl
[idx
++].data
= &ipvs
->sysctl_sync_persist_mode
;
3875 ipvs
->sysctl_sync_qlen_max
= nr_free_buffer_pages() / 32;
3876 tbl
[idx
++].data
= &ipvs
->sysctl_sync_qlen_max
;
3877 ipvs
->sysctl_sync_sock_size
= 0;
3878 tbl
[idx
++].data
= &ipvs
->sysctl_sync_sock_size
;
3879 tbl
[idx
++].data
= &ipvs
->sysctl_cache_bypass
;
3880 tbl
[idx
++].data
= &ipvs
->sysctl_expire_nodest_conn
;
3881 tbl
[idx
++].data
= &ipvs
->sysctl_sloppy_tcp
;
3882 tbl
[idx
++].data
= &ipvs
->sysctl_sloppy_sctp
;
3883 tbl
[idx
++].data
= &ipvs
->sysctl_expire_quiescent_template
;
3884 ipvs
->sysctl_sync_threshold
[0] = DEFAULT_SYNC_THRESHOLD
;
3885 ipvs
->sysctl_sync_threshold
[1] = DEFAULT_SYNC_PERIOD
;
3886 tbl
[idx
].data
= &ipvs
->sysctl_sync_threshold
;
3887 tbl
[idx
++].maxlen
= sizeof(ipvs
->sysctl_sync_threshold
);
3888 ipvs
->sysctl_sync_refresh_period
= DEFAULT_SYNC_REFRESH_PERIOD
;
3889 tbl
[idx
++].data
= &ipvs
->sysctl_sync_refresh_period
;
3890 ipvs
->sysctl_sync_retries
= clamp_t(int, DEFAULT_SYNC_RETRIES
, 0, 3);
3891 tbl
[idx
++].data
= &ipvs
->sysctl_sync_retries
;
3892 tbl
[idx
++].data
= &ipvs
->sysctl_nat_icmp_send
;
3893 ipvs
->sysctl_pmtu_disc
= 1;
3894 tbl
[idx
++].data
= &ipvs
->sysctl_pmtu_disc
;
3895 tbl
[idx
++].data
= &ipvs
->sysctl_backup_only
;
3896 ipvs
->sysctl_conn_reuse_mode
= 1;
3897 tbl
[idx
++].data
= &ipvs
->sysctl_conn_reuse_mode
;
3900 ipvs
->sysctl_hdr
= register_net_sysctl(net
, "net/ipv4/vs", tbl
);
3901 if (ipvs
->sysctl_hdr
== NULL
) {
3902 if (!net_eq(net
, &init_net
))
3906 ip_vs_start_estimator(net
, &ipvs
->tot_stats
);
3907 ipvs
->sysctl_tbl
= tbl
;
3908 /* Schedule defense work */
3909 INIT_DELAYED_WORK(&ipvs
->defense_work
, defense_work_handler
);
3910 schedule_delayed_work(&ipvs
->defense_work
, DEFENSE_TIMER_PERIOD
);
3915 static void __net_exit
ip_vs_control_net_cleanup_sysctl(struct net
*net
)
3917 struct netns_ipvs
*ipvs
= net_ipvs(net
);
3919 cancel_delayed_work_sync(&ipvs
->defense_work
);
3920 cancel_work_sync(&ipvs
->defense_work
.work
);
3921 unregister_net_sysctl_table(ipvs
->sysctl_hdr
);
3922 ip_vs_stop_estimator(net
, &ipvs
->tot_stats
);
3924 if (!net_eq(net
, &init_net
))
3925 kfree(ipvs
->sysctl_tbl
);
3930 static int __net_init
ip_vs_control_net_init_sysctl(struct net
*net
) { return 0; }
3931 static void __net_exit
ip_vs_control_net_cleanup_sysctl(struct net
*net
) { }
3935 static struct notifier_block ip_vs_dst_notifier
= {
3936 .notifier_call
= ip_vs_dst_event
,
3939 int __net_init
ip_vs_control_net_init(struct net
*net
)
3942 struct netns_ipvs
*ipvs
= net_ipvs(net
);
3944 /* Initialize rs_table */
3945 for (idx
= 0; idx
< IP_VS_RTAB_SIZE
; idx
++)
3946 INIT_HLIST_HEAD(&ipvs
->rs_table
[idx
]);
3948 INIT_LIST_HEAD(&ipvs
->dest_trash
);
3949 spin_lock_init(&ipvs
->dest_trash_lock
);
3950 setup_timer(&ipvs
->dest_trash_timer
, ip_vs_dest_trash_expire
,
3951 (unsigned long) net
);
3952 atomic_set(&ipvs
->ftpsvc_counter
, 0);
3953 atomic_set(&ipvs
->nullsvc_counter
, 0);
3956 ipvs
->tot_stats
.cpustats
= alloc_percpu(struct ip_vs_cpu_stats
);
3957 if (!ipvs
->tot_stats
.cpustats
)
3960 for_each_possible_cpu(i
) {
3961 struct ip_vs_cpu_stats
*ipvs_tot_stats
;
3962 ipvs_tot_stats
= per_cpu_ptr(ipvs
->tot_stats
.cpustats
, i
);
3963 u64_stats_init(&ipvs_tot_stats
->syncp
);
3966 spin_lock_init(&ipvs
->tot_stats
.lock
);
3968 proc_create("ip_vs", 0, net
->proc_net
, &ip_vs_info_fops
);
3969 proc_create("ip_vs_stats", 0, net
->proc_net
, &ip_vs_stats_fops
);
3970 proc_create("ip_vs_stats_percpu", 0, net
->proc_net
,
3971 &ip_vs_stats_percpu_fops
);
3973 if (ip_vs_control_net_init_sysctl(net
))
3979 free_percpu(ipvs
->tot_stats
.cpustats
);
3983 void __net_exit
ip_vs_control_net_cleanup(struct net
*net
)
3985 struct netns_ipvs
*ipvs
= net_ipvs(net
);
3987 ip_vs_trash_cleanup(net
);
3988 ip_vs_control_net_cleanup_sysctl(net
);
3989 remove_proc_entry("ip_vs_stats_percpu", net
->proc_net
);
3990 remove_proc_entry("ip_vs_stats", net
->proc_net
);
3991 remove_proc_entry("ip_vs", net
->proc_net
);
3992 free_percpu(ipvs
->tot_stats
.cpustats
);
3995 int __init
ip_vs_register_nl_ioctl(void)
3999 ret
= nf_register_sockopt(&ip_vs_sockopts
);
4001 pr_err("cannot register sockopt.\n");
4005 ret
= ip_vs_genl_register();
4007 pr_err("cannot register Generic Netlink interface.\n");
4013 nf_unregister_sockopt(&ip_vs_sockopts
);
4018 void ip_vs_unregister_nl_ioctl(void)
4020 ip_vs_genl_unregister();
4021 nf_unregister_sockopt(&ip_vs_sockopts
);
4024 int __init
ip_vs_control_init(void)
4031 /* Initialize svc_table, ip_vs_svc_fwm_table */
4032 for (idx
= 0; idx
< IP_VS_SVC_TAB_SIZE
; idx
++) {
4033 INIT_HLIST_HEAD(&ip_vs_svc_table
[idx
]);
4034 INIT_HLIST_HEAD(&ip_vs_svc_fwm_table
[idx
]);
4037 smp_wmb(); /* Do we really need it now ? */
4039 ret
= register_netdevice_notifier(&ip_vs_dst_notifier
);
4048 void ip_vs_control_cleanup(void)
4051 unregister_netdevice_notifier(&ip_vs_dst_notifier
);