1 /* SPDX-License-Identifier: GPL-2.0 */
3 * data structure and functionality definitions
9 #include <linux/ip_vs.h> /* definitions shared with userland */
11 #include <asm/types.h> /* for __uXX types */
13 #include <linux/list.h> /* for struct list_head */
14 #include <linux/spinlock.h> /* for struct rwlock_t */
15 #include <linux/atomic.h> /* for struct atomic_t */
16 #include <linux/refcount.h> /* for struct refcount_t */
18 #include <linux/compiler.h>
19 #include <linux/timer.h>
20 #include <linux/bug.h>
22 #include <net/checksum.h>
23 #include <linux/netfilter.h> /* for union nf_inet_addr */
25 #include <linux/ipv6.h> /* for struct ipv6hdr */
27 #if IS_ENABLED(CONFIG_IP_VS_IPV6)
28 #include <linux/netfilter_ipv6/ip6_tables.h>
30 #if IS_ENABLED(CONFIG_NF_CONNTRACK)
31 #include <net/netfilter/nf_conntrack.h>
33 #include <net/net_namespace.h> /* Netw namespace */
35 #define IP_VS_HDR_INVERSE 1
36 #define IP_VS_HDR_ICMP 2
38 /* Generic access of ipvs struct */
39 static inline struct netns_ipvs
*net_ipvs(struct net
* net
)
44 /* This one needed for single_open_net since net is stored directly in
45 * private not as a struct i.e. seq_file_net can't be used.
47 static inline struct net
*seq_file_single_net(struct seq_file
*seq
)
50 return (struct net
*)seq
->private;
56 /* Connections' size value needed by ip_vs_ctl.c */
57 extern int ip_vs_conn_tab_size
;
60 int hdr_flags
; /* ipvs flags */
61 __u32 off
; /* Where IP or IPv4 header starts */
62 __u32 len
; /* IPv4 simply where L4 starts
63 * IPv6 where L4 Transport Header starts */
64 __u16 fragoffs
; /* IPv6 fragment offset, 0 if first frag (or not frag)*/
67 union nf_inet_addr saddr
;
68 union nf_inet_addr daddr
;
71 static inline void *frag_safe_skb_hp(const struct sk_buff
*skb
, int offset
,
72 int len
, void *buffer
,
73 const struct ip_vs_iphdr
*ipvsh
)
75 return skb_header_pointer(skb
, offset
, len
, buffer
);
78 /* This function handles filling *ip_vs_iphdr, both for IPv4 and IPv6.
79 * IPv6 requires some extra work, as finding proper header position,
80 * depend on the IPv6 extension headers.
83 ip_vs_fill_iph_skb_off(int af
, const struct sk_buff
*skb
, int offset
,
84 int hdr_flags
, struct ip_vs_iphdr
*iphdr
)
86 iphdr
->hdr_flags
= hdr_flags
;
89 #ifdef CONFIG_IP_VS_IPV6
92 const struct ipv6hdr
*iph
= skb_header_pointer(
93 skb
, offset
, sizeof(_iph
), &_iph
);
97 iphdr
->saddr
.in6
= iph
->saddr
;
98 iphdr
->daddr
.in6
= iph
->daddr
;
99 /* ipv6_find_hdr() updates len, flags */
102 iphdr
->protocol
= ipv6_find_hdr(skb
, &iphdr
->len
, -1,
105 if (iphdr
->protocol
< 0)
111 const struct iphdr
*iph
= skb_header_pointer(
112 skb
, offset
, sizeof(_iph
), &_iph
);
116 iphdr
->len
= offset
+ iph
->ihl
* 4;
118 iphdr
->protocol
= iph
->protocol
;
119 iphdr
->saddr
.ip
= iph
->saddr
;
120 iphdr
->daddr
.ip
= iph
->daddr
;
127 ip_vs_fill_iph_skb_icmp(int af
, const struct sk_buff
*skb
, int offset
,
128 bool inverse
, struct ip_vs_iphdr
*iphdr
)
130 int hdr_flags
= IP_VS_HDR_ICMP
;
133 hdr_flags
|= IP_VS_HDR_INVERSE
;
135 return ip_vs_fill_iph_skb_off(af
, skb
, offset
, hdr_flags
, iphdr
);
139 ip_vs_fill_iph_skb(int af
, const struct sk_buff
*skb
, bool inverse
,
140 struct ip_vs_iphdr
*iphdr
)
145 hdr_flags
|= IP_VS_HDR_INVERSE
;
147 return ip_vs_fill_iph_skb_off(af
, skb
, skb_network_offset(skb
),
152 ip_vs_iph_inverse(const struct ip_vs_iphdr
*iph
)
154 return !!(iph
->hdr_flags
& IP_VS_HDR_INVERSE
);
158 ip_vs_iph_icmp(const struct ip_vs_iphdr
*iph
)
160 return !!(iph
->hdr_flags
& IP_VS_HDR_ICMP
);
163 static inline void ip_vs_addr_copy(int af
, union nf_inet_addr
*dst
,
164 const union nf_inet_addr
*src
)
166 #ifdef CONFIG_IP_VS_IPV6
174 static inline void ip_vs_addr_set(int af
, union nf_inet_addr
*dst
,
175 const union nf_inet_addr
*src
)
177 #ifdef CONFIG_IP_VS_IPV6
178 if (af
== AF_INET6
) {
189 static inline int ip_vs_addr_equal(int af
, const union nf_inet_addr
*a
,
190 const union nf_inet_addr
*b
)
192 #ifdef CONFIG_IP_VS_IPV6
194 return ipv6_addr_equal(&a
->in6
, &b
->in6
);
196 return a
->ip
== b
->ip
;
199 #ifdef CONFIG_IP_VS_DEBUG
200 #include <linux/net.h>
202 int ip_vs_get_debug_level(void);
204 static inline const char *ip_vs_dbg_addr(int af
, char *buf
, size_t buf_len
,
205 const union nf_inet_addr
*addr
,
209 #ifdef CONFIG_IP_VS_IPV6
211 len
= snprintf(&buf
[*idx
], buf_len
- *idx
, "[%pI6c]",
215 len
= snprintf(&buf
[*idx
], buf_len
- *idx
, "%pI4",
219 BUG_ON(*idx
> buf_len
+ 1);
220 return &buf
[*idx
- len
];
223 #define IP_VS_DBG_BUF(level, msg, ...) \
225 char ip_vs_dbg_buf[160]; \
226 int ip_vs_dbg_idx = 0; \
227 if (level <= ip_vs_get_debug_level()) \
228 printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \
230 #define IP_VS_ERR_BUF(msg...) \
232 char ip_vs_dbg_buf[160]; \
233 int ip_vs_dbg_idx = 0; \
237 /* Only use from within IP_VS_DBG_BUF() or IP_VS_ERR_BUF macros */
238 #define IP_VS_DBG_ADDR(af, addr) \
239 ip_vs_dbg_addr(af, ip_vs_dbg_buf, \
240 sizeof(ip_vs_dbg_buf), addr, \
243 #define IP_VS_DBG(level, msg, ...) \
245 if (level <= ip_vs_get_debug_level()) \
246 printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \
248 #define IP_VS_DBG_RL(msg, ...) \
250 if (net_ratelimit()) \
251 printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \
253 #define IP_VS_DBG_PKT(level, af, pp, skb, ofs, msg) \
255 if (level <= ip_vs_get_debug_level()) \
256 pp->debug_packet(af, pp, skb, ofs, msg); \
258 #define IP_VS_DBG_RL_PKT(level, af, pp, skb, ofs, msg) \
260 if (level <= ip_vs_get_debug_level() && \
262 pp->debug_packet(af, pp, skb, ofs, msg); \
264 #else /* NO DEBUGGING at ALL */
265 #define IP_VS_DBG_BUF(level, msg...) do {} while (0)
266 #define IP_VS_ERR_BUF(msg...) do {} while (0)
267 #define IP_VS_DBG(level, msg...) do {} while (0)
268 #define IP_VS_DBG_RL(msg...) do {} while (0)
269 #define IP_VS_DBG_PKT(level, af, pp, skb, ofs, msg) do {} while (0)
270 #define IP_VS_DBG_RL_PKT(level, af, pp, skb, ofs, msg) do {} while (0)
273 #define IP_VS_BUG() BUG()
274 #define IP_VS_ERR_RL(msg, ...) \
276 if (net_ratelimit()) \
277 pr_err(msg, ##__VA_ARGS__); \
280 #ifdef CONFIG_IP_VS_DEBUG
281 #define EnterFunction(level) \
283 if (level <= ip_vs_get_debug_level()) \
285 pr_fmt("Enter: %s, %s line %i\n"), \
286 __func__, __FILE__, __LINE__); \
288 #define LeaveFunction(level) \
290 if (level <= ip_vs_get_debug_level()) \
292 pr_fmt("Leave: %s, %s line %i\n"), \
293 __func__, __FILE__, __LINE__); \
296 #define EnterFunction(level) do {} while (0)
297 #define LeaveFunction(level) do {} while (0)
300 /* The port number of FTP service (in network order). */
301 #define FTPPORT cpu_to_be16(21)
302 #define FTPDATA cpu_to_be16(20)
304 /* TCP State Values */
306 IP_VS_TCP_S_NONE
= 0,
307 IP_VS_TCP_S_ESTABLISHED
,
308 IP_VS_TCP_S_SYN_SENT
,
309 IP_VS_TCP_S_SYN_RECV
,
310 IP_VS_TCP_S_FIN_WAIT
,
311 IP_VS_TCP_S_TIME_WAIT
,
313 IP_VS_TCP_S_CLOSE_WAIT
,
314 IP_VS_TCP_S_LAST_ACK
,
320 /* UDP State Values */
326 /* ICMP State Values */
332 /* SCTP State Values */
333 enum ip_vs_sctp_states
{
337 IP_VS_SCTP_S_COOKIE_SENT
,
338 IP_VS_SCTP_S_COOKIE_REPLIED
,
339 IP_VS_SCTP_S_COOKIE_WAIT
,
341 IP_VS_SCTP_S_COOKIE_ECHOED
,
342 IP_VS_SCTP_S_ESTABLISHED
,
343 IP_VS_SCTP_S_SHUTDOWN_SENT
,
344 IP_VS_SCTP_S_SHUTDOWN_RECEIVED
,
345 IP_VS_SCTP_S_SHUTDOWN_ACK_SENT
,
346 IP_VS_SCTP_S_REJECTED
,
351 /* Delta sequence info structure
352 * Each ip_vs_conn has 2 (output AND input seq. changes).
353 * Only used in the VS/NAT.
356 __u32 init_seq
; /* Add delta from this seq */
357 __u32 delta
; /* Delta in sequence numbers */
358 __u32 previous_delta
; /* Delta in sequence numbers
359 * before last resized pkt */
362 /* counters per cpu */
363 struct ip_vs_counters
{
364 __u64 conns
; /* connections scheduled */
365 __u64 inpkts
; /* incoming packets */
366 __u64 outpkts
; /* outgoing packets */
367 __u64 inbytes
; /* incoming bytes */
368 __u64 outbytes
; /* outgoing bytes */
371 struct ip_vs_cpu_stats
{
372 struct ip_vs_counters cnt
;
373 struct u64_stats_sync syncp
;
376 /* IPVS statistics objects */
377 struct ip_vs_estimator
{
378 struct list_head list
;
394 * IPVS statistics object, 64-bit kernel version of struct ip_vs_stats_user
396 struct ip_vs_kstats
{
397 u64 conns
; /* connections scheduled */
398 u64 inpkts
; /* incoming packets */
399 u64 outpkts
; /* outgoing packets */
400 u64 inbytes
; /* incoming bytes */
401 u64 outbytes
; /* outgoing bytes */
403 u64 cps
; /* current connection rate */
404 u64 inpps
; /* current in packet rate */
405 u64 outpps
; /* current out packet rate */
406 u64 inbps
; /* current in byte rate */
407 u64 outbps
; /* current out byte rate */
411 struct ip_vs_kstats kstats
; /* kernel statistics */
412 struct ip_vs_estimator est
; /* estimator */
413 struct ip_vs_cpu_stats __percpu
*cpustats
; /* per cpu counters */
414 spinlock_t lock
; /* spin lock */
415 struct ip_vs_kstats kstats0
; /* reset values */
423 struct ip_vs_proto_data
;
425 struct ip_vs_protocol
{
426 struct ip_vs_protocol
*next
;
432 void (*init
)(struct ip_vs_protocol
*pp
);
434 void (*exit
)(struct ip_vs_protocol
*pp
);
436 int (*init_netns
)(struct netns_ipvs
*ipvs
, struct ip_vs_proto_data
*pd
);
438 void (*exit_netns
)(struct netns_ipvs
*ipvs
, struct ip_vs_proto_data
*pd
);
440 int (*conn_schedule
)(struct netns_ipvs
*ipvs
,
441 int af
, struct sk_buff
*skb
,
442 struct ip_vs_proto_data
*pd
,
443 int *verdict
, struct ip_vs_conn
**cpp
,
444 struct ip_vs_iphdr
*iph
);
447 (*conn_in_get
)(struct netns_ipvs
*ipvs
,
449 const struct sk_buff
*skb
,
450 const struct ip_vs_iphdr
*iph
);
453 (*conn_out_get
)(struct netns_ipvs
*ipvs
,
455 const struct sk_buff
*skb
,
456 const struct ip_vs_iphdr
*iph
);
458 int (*snat_handler
)(struct sk_buff
*skb
, struct ip_vs_protocol
*pp
,
459 struct ip_vs_conn
*cp
, struct ip_vs_iphdr
*iph
);
461 int (*dnat_handler
)(struct sk_buff
*skb
, struct ip_vs_protocol
*pp
,
462 struct ip_vs_conn
*cp
, struct ip_vs_iphdr
*iph
);
464 int (*csum_check
)(int af
, struct sk_buff
*skb
,
465 struct ip_vs_protocol
*pp
);
467 const char *(*state_name
)(int state
);
469 void (*state_transition
)(struct ip_vs_conn
*cp
, int direction
,
470 const struct sk_buff
*skb
,
471 struct ip_vs_proto_data
*pd
);
473 int (*register_app
)(struct netns_ipvs
*ipvs
, struct ip_vs_app
*inc
);
475 void (*unregister_app
)(struct netns_ipvs
*ipvs
, struct ip_vs_app
*inc
);
477 int (*app_conn_bind
)(struct ip_vs_conn
*cp
);
479 void (*debug_packet
)(int af
, struct ip_vs_protocol
*pp
,
480 const struct sk_buff
*skb
,
484 void (*timeout_change
)(struct ip_vs_proto_data
*pd
, int flags
);
487 /* protocol data per netns */
488 struct ip_vs_proto_data
{
489 struct ip_vs_proto_data
*next
;
490 struct ip_vs_protocol
*pp
;
491 int *timeout_table
; /* protocol timeout table */
492 atomic_t appcnt
; /* counter of proto app incs. */
493 struct tcp_states_t
*tcp_state_table
;
496 struct ip_vs_protocol
*ip_vs_proto_get(unsigned short proto
);
497 struct ip_vs_proto_data
*ip_vs_proto_data_get(struct netns_ipvs
*ipvs
,
498 unsigned short proto
);
500 struct ip_vs_conn_param
{
501 struct netns_ipvs
*ipvs
;
502 const union nf_inet_addr
*caddr
;
503 const union nf_inet_addr
*vaddr
;
509 const struct ip_vs_pe
*pe
;
514 /* IP_VS structure allocated for each dynamically scheduled connection */
516 struct hlist_node c_list
; /* hashed list heads */
517 /* Protocol, addresses and port numbers */
521 u16 af
; /* address family */
522 union nf_inet_addr caddr
; /* client address */
523 union nf_inet_addr vaddr
; /* virtual address */
524 union nf_inet_addr daddr
; /* destination address */
525 volatile __u32 flags
; /* status flags */
526 __u16 protocol
; /* Which protocol (TCP/UDP) */
527 __u16 daf
; /* Address family of the dest */
528 struct netns_ipvs
*ipvs
;
530 /* counter and timer */
531 refcount_t refcnt
; /* reference count */
532 struct timer_list timer
; /* Expiration timer */
533 volatile unsigned long timeout
; /* timeout */
535 /* Flags and state transition */
536 spinlock_t lock
; /* lock for state transition */
537 volatile __u16 state
; /* state info */
538 volatile __u16 old_state
; /* old state, to be used for
539 * state transition triggerd
542 __u32 fwmark
; /* Fire wall mark from skb */
543 unsigned long sync_endtime
; /* jiffies + sent_retries */
545 /* Control members */
546 struct ip_vs_conn
*control
; /* Master control connection */
547 atomic_t n_control
; /* Number of controlled ones */
548 struct ip_vs_dest
*dest
; /* real server */
549 atomic_t in_pkts
; /* incoming packet counter */
551 /* Packet transmitter for different forwarding methods. If it
552 * mangles the packet, it must return NF_DROP or better NF_STOLEN,
553 * otherwise this must be changed to a sk_buff **.
554 * NF_ACCEPT can be returned when destination is local.
556 int (*packet_xmit
)(struct sk_buff
*skb
, struct ip_vs_conn
*cp
,
557 struct ip_vs_protocol
*pp
, struct ip_vs_iphdr
*iph
);
559 /* Note: we can group the following members into a structure,
560 * in order to save more space, and the following members are
561 * only used in VS/NAT anyway
563 struct ip_vs_app
*app
; /* bound ip_vs_app object */
564 void *app_data
; /* Application private data */
565 struct ip_vs_seq in_seq
; /* incoming seq. struct */
566 struct ip_vs_seq out_seq
; /* outgoing seq. struct */
568 const struct ip_vs_pe
*pe
;
572 struct rcu_head rcu_head
;
575 /* Extended internal versions of struct ip_vs_service_user and ip_vs_dest_user
578 * We need these to conveniently pass around service and destination
579 * options, but unfortunately, we also need to keep the old definitions to
580 * maintain userspace backwards compatibility for the setsockopt interface.
582 struct ip_vs_service_user_kern
{
583 /* virtual service addresses */
586 union nf_inet_addr addr
; /* virtual ip address */
588 u32 fwmark
; /* firwall mark of service */
590 /* virtual service options */
593 unsigned int flags
; /* virtual service flags */
594 unsigned int timeout
; /* persistent timeout in sec */
595 __be32 netmask
; /* persistent netmask or plen */
599 struct ip_vs_dest_user_kern
{
600 /* destination server address */
601 union nf_inet_addr addr
;
604 /* real server options */
605 unsigned int conn_flags
; /* connection flags */
606 int weight
; /* destination weight */
608 /* thresholds for active connections */
609 u32 u_threshold
; /* upper threshold */
610 u32 l_threshold
; /* lower threshold */
612 /* Address family of addr */
618 * The information about the virtual service offered to the net and the
619 * forwarding entries.
621 struct ip_vs_service
{
622 struct hlist_node s_list
; /* for normal service table */
623 struct hlist_node f_list
; /* for fwmark-based service table */
624 atomic_t refcnt
; /* reference counter */
626 u16 af
; /* address family */
627 __u16 protocol
; /* which protocol (TCP/UDP) */
628 union nf_inet_addr addr
; /* IP address for virtual service */
629 __be16 port
; /* port number for the service */
630 __u32 fwmark
; /* firewall mark of the service */
631 unsigned int flags
; /* service status flags */
632 unsigned int timeout
; /* persistent timeout in ticks */
633 __be32 netmask
; /* grouping granularity, mask/plen */
634 struct netns_ipvs
*ipvs
;
636 struct list_head destinations
; /* real server d-linked list */
637 __u32 num_dests
; /* number of servers */
638 struct ip_vs_stats stats
; /* statistics for the service */
641 struct ip_vs_scheduler __rcu
*scheduler
; /* bound scheduler object */
642 spinlock_t sched_lock
; /* lock sched_data */
643 void *sched_data
; /* scheduler application data */
645 /* alternate persistence engine */
646 struct ip_vs_pe __rcu
*pe
;
648 struct rcu_head rcu_head
;
651 /* Information for cached dst */
652 struct ip_vs_dest_dst
{
653 struct dst_entry
*dst_cache
; /* destination cache entry */
655 union nf_inet_addr dst_saddr
;
656 struct rcu_head rcu_head
;
659 /* The real server destination forwarding entry with ip address, port number,
663 struct list_head n_list
; /* for the dests in the service */
664 struct hlist_node d_list
; /* for table with all the dests */
666 u16 af
; /* address family */
667 __be16 port
; /* port number of the server */
668 union nf_inet_addr addr
; /* IP address of the server */
669 volatile unsigned int flags
; /* dest status flags */
670 atomic_t conn_flags
; /* flags to copy to conn */
671 atomic_t weight
; /* server weight */
673 refcount_t refcnt
; /* reference counter */
674 struct ip_vs_stats stats
; /* statistics */
675 unsigned long idle_start
; /* start time, jiffies */
677 /* connection counters and thresholds */
678 atomic_t activeconns
; /* active connections */
679 atomic_t inactconns
; /* inactive connections */
680 atomic_t persistconns
; /* persistent connections */
681 __u32 u_threshold
; /* upper threshold */
682 __u32 l_threshold
; /* lower threshold */
684 /* for destination cache */
685 spinlock_t dst_lock
; /* lock of dst_cache */
686 struct ip_vs_dest_dst __rcu
*dest_dst
; /* cached dst info */
688 /* for virtual service */
689 struct ip_vs_service __rcu
*svc
; /* service it belongs to */
690 __u16 protocol
; /* which protocol (TCP/UDP) */
691 __be16 vport
; /* virtual port number */
692 union nf_inet_addr vaddr
; /* virtual IP address */
693 __u32 vfwmark
; /* firewall mark of service */
695 struct list_head t_list
; /* in dest_trash */
696 unsigned int in_rs_table
:1; /* we are in rs_table */
699 /* The scheduler object */
700 struct ip_vs_scheduler
{
701 struct list_head n_list
; /* d-linked list head */
702 char *name
; /* scheduler name */
703 atomic_t refcnt
; /* reference counter */
704 struct module
*module
; /* THIS_MODULE/NULL */
706 /* scheduler initializing service */
707 int (*init_service
)(struct ip_vs_service
*svc
);
708 /* scheduling service finish */
709 void (*done_service
)(struct ip_vs_service
*svc
);
711 int (*add_dest
)(struct ip_vs_service
*svc
, struct ip_vs_dest
*dest
);
712 /* dest is unlinked */
713 int (*del_dest
)(struct ip_vs_service
*svc
, struct ip_vs_dest
*dest
);
714 /* dest is updated */
715 int (*upd_dest
)(struct ip_vs_service
*svc
, struct ip_vs_dest
*dest
);
717 /* selecting a server from the given service */
718 struct ip_vs_dest
* (*schedule
)(struct ip_vs_service
*svc
,
719 const struct sk_buff
*skb
,
720 struct ip_vs_iphdr
*iph
);
723 /* The persistence engine object */
725 struct list_head n_list
; /* d-linked list head */
726 char *name
; /* scheduler name */
727 atomic_t refcnt
; /* reference counter */
728 struct module
*module
; /* THIS_MODULE/NULL */
730 /* get the connection template, if any */
731 int (*fill_param
)(struct ip_vs_conn_param
*p
, struct sk_buff
*skb
);
732 bool (*ct_match
)(const struct ip_vs_conn_param
*p
,
733 struct ip_vs_conn
*ct
);
734 u32 (*hashkey_raw
)(const struct ip_vs_conn_param
*p
, u32 initval
,
736 int (*show_pe_data
)(const struct ip_vs_conn
*cp
, char *buf
);
737 /* create connections for real-server outgoing packets */
738 struct ip_vs_conn
* (*conn_out
)(struct ip_vs_service
*svc
,
739 struct ip_vs_dest
*dest
,
741 const struct ip_vs_iphdr
*iph
,
742 __be16 dport
, __be16 cport
);
745 /* The application module object (a.k.a. app incarnation) */
747 struct list_head a_list
; /* member in app list */
748 int type
; /* IP_VS_APP_TYPE_xxx */
749 char *name
; /* application module name */
751 struct module
*module
; /* THIS_MODULE/NULL */
752 struct list_head incs_list
; /* list of incarnations */
754 /* members for application incarnations */
755 struct list_head p_list
; /* member in proto app list */
756 struct ip_vs_app
*app
; /* its real application */
757 __be16 port
; /* port number in net order */
758 atomic_t usecnt
; /* usage counter */
759 struct rcu_head rcu_head
;
761 /* output hook: Process packet in inout direction, diff set for TCP.
762 * Return: 0=Error, 1=Payload Not Mangled/Mangled but checksum is ok,
763 * 2=Mangled but checksum was not updated
765 int (*pkt_out
)(struct ip_vs_app
*, struct ip_vs_conn
*,
766 struct sk_buff
*, int *diff
);
768 /* input hook: Process packet in outin direction, diff set for TCP.
769 * Return: 0=Error, 1=Payload Not Mangled/Mangled but checksum is ok,
770 * 2=Mangled but checksum was not updated
772 int (*pkt_in
)(struct ip_vs_app
*, struct ip_vs_conn
*,
773 struct sk_buff
*, int *diff
);
775 /* ip_vs_app initializer */
776 int (*init_conn
)(struct ip_vs_app
*, struct ip_vs_conn
*);
778 /* ip_vs_app finish */
779 int (*done_conn
)(struct ip_vs_app
*, struct ip_vs_conn
*);
783 int (*bind_conn
)(struct ip_vs_app
*, struct ip_vs_conn
*,
784 struct ip_vs_protocol
*);
786 void (*unbind_conn
)(struct ip_vs_app
*, struct ip_vs_conn
*);
792 int (*conn_schedule
)(struct sk_buff
*skb
, struct ip_vs_app
*app
,
793 int *verdict
, struct ip_vs_conn
**cpp
);
796 (*conn_in_get
)(const struct sk_buff
*skb
, struct ip_vs_app
*app
,
797 const struct iphdr
*iph
, int inverse
);
800 (*conn_out_get
)(const struct sk_buff
*skb
, struct ip_vs_app
*app
,
801 const struct iphdr
*iph
, int inverse
);
803 int (*state_transition
)(struct ip_vs_conn
*cp
, int direction
,
804 const struct sk_buff
*skb
,
805 struct ip_vs_app
*app
);
807 void (*timeout_change
)(struct ip_vs_app
*app
, int flags
);
810 struct ipvs_master_sync_state
{
811 struct list_head sync_queue
;
812 struct ip_vs_sync_buff
*sync_buff
;
813 unsigned long sync_queue_len
;
814 unsigned int sync_queue_delay
;
815 struct delayed_work master_wakeup_work
;
816 struct netns_ipvs
*ipvs
;
819 struct ip_vs_sync_thread_data
;
821 /* How much time to keep dests in trash */
822 #define IP_VS_DEST_TRASH_PERIOD (120 * HZ)
824 struct ipvs_sync_daemon_cfg
{
825 union nf_inet_addr mcast_group
;
831 /* multicast interface name */
832 char mcast_ifn
[IP_VS_IFNAME_MAXLEN
];
835 /* IPVS in network namespace */
837 int gen
; /* Generation */
838 int enable
; /* enable like nf_hooks do */
839 /* Hash table: for real service lookups */
840 #define IP_VS_RTAB_BITS 4
841 #define IP_VS_RTAB_SIZE (1 << IP_VS_RTAB_BITS)
842 #define IP_VS_RTAB_MASK (IP_VS_RTAB_SIZE - 1)
844 struct hlist_head rs_table
[IP_VS_RTAB_SIZE
];
846 struct list_head app_list
;
848 #define IP_VS_PROTO_TAB_SIZE 32 /* must be power of 2 */
849 struct ip_vs_proto_data
*proto_data_table
[IP_VS_PROTO_TAB_SIZE
];
850 /* ip_vs_proto_tcp */
851 #ifdef CONFIG_IP_VS_PROTO_TCP
852 #define TCP_APP_TAB_BITS 4
853 #define TCP_APP_TAB_SIZE (1 << TCP_APP_TAB_BITS)
854 #define TCP_APP_TAB_MASK (TCP_APP_TAB_SIZE - 1)
855 struct list_head tcp_apps
[TCP_APP_TAB_SIZE
];
857 /* ip_vs_proto_udp */
858 #ifdef CONFIG_IP_VS_PROTO_UDP
859 #define UDP_APP_TAB_BITS 4
860 #define UDP_APP_TAB_SIZE (1 << UDP_APP_TAB_BITS)
861 #define UDP_APP_TAB_MASK (UDP_APP_TAB_SIZE - 1)
862 struct list_head udp_apps
[UDP_APP_TAB_SIZE
];
864 /* ip_vs_proto_sctp */
865 #ifdef CONFIG_IP_VS_PROTO_SCTP
866 #define SCTP_APP_TAB_BITS 4
867 #define SCTP_APP_TAB_SIZE (1 << SCTP_APP_TAB_BITS)
868 #define SCTP_APP_TAB_MASK (SCTP_APP_TAB_SIZE - 1)
869 /* Hash table for SCTP application incarnations */
870 struct list_head sctp_apps
[SCTP_APP_TAB_SIZE
];
873 atomic_t conn_count
; /* connection counter */
876 struct ip_vs_stats tot_stats
; /* Statistics & est. */
878 int num_services
; /* no of virtual services */
880 /* Trash for destinations */
881 struct list_head dest_trash
;
882 spinlock_t dest_trash_lock
;
883 struct timer_list dest_trash_timer
; /* expiration timer */
884 /* Service counters */
885 atomic_t ftpsvc_counter
;
886 atomic_t nullsvc_counter
;
887 atomic_t conn_out_counter
;
890 /* 1/rate drop and drop-entry variables */
891 struct delayed_work defense_work
; /* Work handler */
897 spinlock_t dropentry_lock
; /* drop entry handling */
898 spinlock_t droppacket_lock
; /* drop packet handling */
899 spinlock_t securetcp_lock
; /* state and timeout tables */
902 struct ctl_table_header
*sysctl_hdr
;
903 struct ctl_table
*sysctl_tbl
;
906 /* sysctl variables */
907 int sysctl_amemthresh
;
908 int sysctl_am_droprate
;
909 int sysctl_drop_entry
;
910 int sysctl_drop_packet
;
911 int sysctl_secure_tcp
;
912 #ifdef CONFIG_IP_VS_NFCT
913 int sysctl_conntrack
;
915 int sysctl_snat_reroute
;
917 int sysctl_sync_ports
;
918 int sysctl_sync_persist_mode
;
919 unsigned long sysctl_sync_qlen_max
;
920 int sysctl_sync_sock_size
;
921 int sysctl_cache_bypass
;
922 int sysctl_expire_nodest_conn
;
923 int sysctl_sloppy_tcp
;
924 int sysctl_sloppy_sctp
;
925 int sysctl_expire_quiescent_template
;
926 int sysctl_sync_threshold
[2];
927 unsigned int sysctl_sync_refresh_period
;
928 int sysctl_sync_retries
;
929 int sysctl_nat_icmp_send
;
930 int sysctl_pmtu_disc
;
931 int sysctl_backup_only
;
932 int sysctl_conn_reuse_mode
;
933 int sysctl_schedule_icmp
;
934 int sysctl_ignore_tunneled
;
937 int sysctl_lblc_expiration
;
938 struct ctl_table_header
*lblc_ctl_header
;
939 struct ctl_table
*lblc_ctl_table
;
941 int sysctl_lblcr_expiration
;
942 struct ctl_table_header
*lblcr_ctl_header
;
943 struct ctl_table
*lblcr_ctl_table
;
945 struct list_head est_list
; /* estimator list */
947 struct timer_list est_timer
; /* Estimation timer */
949 spinlock_t sync_lock
;
950 struct ipvs_master_sync_state
*ms
;
951 spinlock_t sync_buff_lock
;
952 struct ip_vs_sync_thread_data
*master_tinfo
;
953 struct ip_vs_sync_thread_data
*backup_tinfo
;
955 volatile int sync_state
;
956 struct mutex sync_mutex
;
957 struct ipvs_sync_daemon_cfg mcfg
; /* Master Configuration */
958 struct ipvs_sync_daemon_cfg bcfg
; /* Backup Configuration */
959 /* net name space ptr */
960 struct net
*net
; /* Needed by timer routines */
961 /* Number of heterogeneous destinations, needed becaus heterogeneous
962 * are not supported when synchronization is enabled.
964 unsigned int mixed_address_family_dests
;
967 #define DEFAULT_SYNC_THRESHOLD 3
968 #define DEFAULT_SYNC_PERIOD 50
969 #define DEFAULT_SYNC_VER 1
970 #define DEFAULT_SLOPPY_TCP 0
971 #define DEFAULT_SLOPPY_SCTP 0
972 #define DEFAULT_SYNC_REFRESH_PERIOD (0U * HZ)
973 #define DEFAULT_SYNC_RETRIES 0
974 #define IPVS_SYNC_WAKEUP_RATE 8
975 #define IPVS_SYNC_QLEN_MAX (IPVS_SYNC_WAKEUP_RATE * 4)
976 #define IPVS_SYNC_SEND_DELAY (HZ / 50)
977 #define IPVS_SYNC_CHECK_PERIOD HZ
978 #define IPVS_SYNC_FLUSH_TIME (HZ * 2)
979 #define IPVS_SYNC_PORTS_MAX (1 << 6)
983 static inline int sysctl_sync_threshold(struct netns_ipvs
*ipvs
)
985 return ipvs
->sysctl_sync_threshold
[0];
988 static inline int sysctl_sync_period(struct netns_ipvs
*ipvs
)
990 return READ_ONCE(ipvs
->sysctl_sync_threshold
[1]);
993 static inline unsigned int sysctl_sync_refresh_period(struct netns_ipvs
*ipvs
)
995 return READ_ONCE(ipvs
->sysctl_sync_refresh_period
);
998 static inline int sysctl_sync_retries(struct netns_ipvs
*ipvs
)
1000 return ipvs
->sysctl_sync_retries
;
1003 static inline int sysctl_sync_ver(struct netns_ipvs
*ipvs
)
1005 return ipvs
->sysctl_sync_ver
;
1008 static inline int sysctl_sloppy_tcp(struct netns_ipvs
*ipvs
)
1010 return ipvs
->sysctl_sloppy_tcp
;
1013 static inline int sysctl_sloppy_sctp(struct netns_ipvs
*ipvs
)
1015 return ipvs
->sysctl_sloppy_sctp
;
1018 static inline int sysctl_sync_ports(struct netns_ipvs
*ipvs
)
1020 return READ_ONCE(ipvs
->sysctl_sync_ports
);
1023 static inline int sysctl_sync_persist_mode(struct netns_ipvs
*ipvs
)
1025 return ipvs
->sysctl_sync_persist_mode
;
1028 static inline unsigned long sysctl_sync_qlen_max(struct netns_ipvs
*ipvs
)
1030 return ipvs
->sysctl_sync_qlen_max
;
1033 static inline int sysctl_sync_sock_size(struct netns_ipvs
*ipvs
)
1035 return ipvs
->sysctl_sync_sock_size
;
1038 static inline int sysctl_pmtu_disc(struct netns_ipvs
*ipvs
)
1040 return ipvs
->sysctl_pmtu_disc
;
1043 static inline int sysctl_backup_only(struct netns_ipvs
*ipvs
)
1045 return ipvs
->sync_state
& IP_VS_STATE_BACKUP
&&
1046 ipvs
->sysctl_backup_only
;
1049 static inline int sysctl_conn_reuse_mode(struct netns_ipvs
*ipvs
)
1051 return ipvs
->sysctl_conn_reuse_mode
;
1054 static inline int sysctl_schedule_icmp(struct netns_ipvs
*ipvs
)
1056 return ipvs
->sysctl_schedule_icmp
;
1059 static inline int sysctl_ignore_tunneled(struct netns_ipvs
*ipvs
)
1061 return ipvs
->sysctl_ignore_tunneled
;
1064 static inline int sysctl_cache_bypass(struct netns_ipvs
*ipvs
)
1066 return ipvs
->sysctl_cache_bypass
;
1071 static inline int sysctl_sync_threshold(struct netns_ipvs
*ipvs
)
1073 return DEFAULT_SYNC_THRESHOLD
;
1076 static inline int sysctl_sync_period(struct netns_ipvs
*ipvs
)
1078 return DEFAULT_SYNC_PERIOD
;
1081 static inline unsigned int sysctl_sync_refresh_period(struct netns_ipvs
*ipvs
)
1083 return DEFAULT_SYNC_REFRESH_PERIOD
;
1086 static inline int sysctl_sync_retries(struct netns_ipvs
*ipvs
)
1088 return DEFAULT_SYNC_RETRIES
& 3;
1091 static inline int sysctl_sync_ver(struct netns_ipvs
*ipvs
)
1093 return DEFAULT_SYNC_VER
;
1096 static inline int sysctl_sloppy_tcp(struct netns_ipvs
*ipvs
)
1098 return DEFAULT_SLOPPY_TCP
;
1101 static inline int sysctl_sloppy_sctp(struct netns_ipvs
*ipvs
)
1103 return DEFAULT_SLOPPY_SCTP
;
1106 static inline int sysctl_sync_ports(struct netns_ipvs
*ipvs
)
1111 static inline int sysctl_sync_persist_mode(struct netns_ipvs
*ipvs
)
1116 static inline unsigned long sysctl_sync_qlen_max(struct netns_ipvs
*ipvs
)
1118 return IPVS_SYNC_QLEN_MAX
;
1121 static inline int sysctl_sync_sock_size(struct netns_ipvs
*ipvs
)
1126 static inline int sysctl_pmtu_disc(struct netns_ipvs
*ipvs
)
1131 static inline int sysctl_backup_only(struct netns_ipvs
*ipvs
)
1136 static inline int sysctl_conn_reuse_mode(struct netns_ipvs
*ipvs
)
1141 static inline int sysctl_schedule_icmp(struct netns_ipvs
*ipvs
)
1146 static inline int sysctl_ignore_tunneled(struct netns_ipvs
*ipvs
)
1151 static inline int sysctl_cache_bypass(struct netns_ipvs
*ipvs
)
1158 /* IPVS core functions
1159 * (from ip_vs_core.c)
1161 const char *ip_vs_proto_name(unsigned int proto
);
1162 void ip_vs_init_hash_table(struct list_head
*table
, int rows
);
1163 struct ip_vs_conn
*ip_vs_new_conn_out(struct ip_vs_service
*svc
,
1164 struct ip_vs_dest
*dest
,
1165 struct sk_buff
*skb
,
1166 const struct ip_vs_iphdr
*iph
,
1169 #define IP_VS_INIT_HASH_TABLE(t) ip_vs_init_hash_table((t), ARRAY_SIZE((t)))
1171 #define IP_VS_APP_TYPE_FTP 1
1173 /* ip_vs_conn handling functions
1174 * (from ip_vs_conn.c)
1177 IP_VS_DIR_INPUT
= 0,
1179 IP_VS_DIR_INPUT_ONLY
,
1183 static inline void ip_vs_conn_fill_param(struct netns_ipvs
*ipvs
, int af
, int protocol
,
1184 const union nf_inet_addr
*caddr
,
1186 const union nf_inet_addr
*vaddr
,
1188 struct ip_vs_conn_param
*p
)
1192 p
->protocol
= protocol
;
1201 struct ip_vs_conn
*ip_vs_conn_in_get(const struct ip_vs_conn_param
*p
);
1202 struct ip_vs_conn
*ip_vs_ct_in_get(const struct ip_vs_conn_param
*p
);
1204 struct ip_vs_conn
* ip_vs_conn_in_get_proto(struct netns_ipvs
*ipvs
, int af
,
1205 const struct sk_buff
*skb
,
1206 const struct ip_vs_iphdr
*iph
);
1208 struct ip_vs_conn
*ip_vs_conn_out_get(const struct ip_vs_conn_param
*p
);
1210 struct ip_vs_conn
* ip_vs_conn_out_get_proto(struct netns_ipvs
*ipvs
, int af
,
1211 const struct sk_buff
*skb
,
1212 const struct ip_vs_iphdr
*iph
);
1214 /* Get reference to gain full access to conn.
1215 * By default, RCU read-side critical sections have access only to
1216 * conn fields and its PE data, see ip_vs_conn_rcu_free() for reference.
1218 static inline bool __ip_vs_conn_get(struct ip_vs_conn
*cp
)
1220 return refcount_inc_not_zero(&cp
->refcnt
);
1223 /* put back the conn without restarting its timer */
1224 static inline void __ip_vs_conn_put(struct ip_vs_conn
*cp
)
1226 smp_mb__before_atomic();
1227 refcount_dec(&cp
->refcnt
);
1229 void ip_vs_conn_put(struct ip_vs_conn
*cp
);
1230 void ip_vs_conn_fill_cport(struct ip_vs_conn
*cp
, __be16 cport
);
1232 struct ip_vs_conn
*ip_vs_conn_new(const struct ip_vs_conn_param
*p
, int dest_af
,
1233 const union nf_inet_addr
*daddr
,
1234 __be16 dport
, unsigned int flags
,
1235 struct ip_vs_dest
*dest
, __u32 fwmark
);
1236 void ip_vs_conn_expire_now(struct ip_vs_conn
*cp
);
1238 const char *ip_vs_state_name(__u16 proto
, int state
);
1240 void ip_vs_tcp_conn_listen(struct ip_vs_conn
*cp
);
1241 int ip_vs_check_template(struct ip_vs_conn
*ct
, struct ip_vs_dest
*cdest
);
1242 void ip_vs_random_dropentry(struct netns_ipvs
*ipvs
);
1243 int ip_vs_conn_init(void);
1244 void ip_vs_conn_cleanup(void);
1246 static inline void ip_vs_control_del(struct ip_vs_conn
*cp
)
1248 struct ip_vs_conn
*ctl_cp
= cp
->control
;
1250 IP_VS_ERR_BUF("request control DEL for uncontrolled: "
1252 IP_VS_DBG_ADDR(cp
->af
, &cp
->caddr
),
1254 IP_VS_DBG_ADDR(cp
->af
, &cp
->vaddr
),
1260 IP_VS_DBG_BUF(7, "DELeting control for: "
1261 "cp.dst=%s:%d ctl_cp.dst=%s:%d\n",
1262 IP_VS_DBG_ADDR(cp
->af
, &cp
->caddr
),
1264 IP_VS_DBG_ADDR(cp
->af
, &ctl_cp
->caddr
),
1265 ntohs(ctl_cp
->cport
));
1268 if (atomic_read(&ctl_cp
->n_control
) == 0) {
1269 IP_VS_ERR_BUF("BUG control DEL with n=0 : "
1271 IP_VS_DBG_ADDR(cp
->af
, &cp
->caddr
),
1273 IP_VS_DBG_ADDR(cp
->af
, &cp
->vaddr
),
1278 atomic_dec(&ctl_cp
->n_control
);
1282 ip_vs_control_add(struct ip_vs_conn
*cp
, struct ip_vs_conn
*ctl_cp
)
1285 IP_VS_ERR_BUF("request control ADD for already controlled: "
1287 IP_VS_DBG_ADDR(cp
->af
, &cp
->caddr
),
1289 IP_VS_DBG_ADDR(cp
->af
, &cp
->vaddr
),
1292 ip_vs_control_del(cp
);
1295 IP_VS_DBG_BUF(7, "ADDing control for: "
1296 "cp.dst=%s:%d ctl_cp.dst=%s:%d\n",
1297 IP_VS_DBG_ADDR(cp
->af
, &cp
->caddr
),
1299 IP_VS_DBG_ADDR(cp
->af
, &ctl_cp
->caddr
),
1300 ntohs(ctl_cp
->cport
));
1302 cp
->control
= ctl_cp
;
1303 atomic_inc(&ctl_cp
->n_control
);
1306 /* IPVS netns init & cleanup functions */
1307 int ip_vs_estimator_net_init(struct netns_ipvs
*ipvs
);
1308 int ip_vs_control_net_init(struct netns_ipvs
*ipvs
);
1309 int ip_vs_protocol_net_init(struct netns_ipvs
*ipvs
);
1310 int ip_vs_app_net_init(struct netns_ipvs
*ipvs
);
1311 int ip_vs_conn_net_init(struct netns_ipvs
*ipvs
);
1312 int ip_vs_sync_net_init(struct netns_ipvs
*ipvs
);
1313 void ip_vs_conn_net_cleanup(struct netns_ipvs
*ipvs
);
1314 void ip_vs_app_net_cleanup(struct netns_ipvs
*ipvs
);
1315 void ip_vs_protocol_net_cleanup(struct netns_ipvs
*ipvs
);
1316 void ip_vs_control_net_cleanup(struct netns_ipvs
*ipvs
);
1317 void ip_vs_estimator_net_cleanup(struct netns_ipvs
*ipvs
);
1318 void ip_vs_sync_net_cleanup(struct netns_ipvs
*ipvs
);
1319 void ip_vs_service_net_cleanup(struct netns_ipvs
*ipvs
);
1321 /* IPVS application functions
1322 * (from ip_vs_app.c)
1324 #define IP_VS_APP_MAX_PORTS 8
1325 struct ip_vs_app
*register_ip_vs_app(struct netns_ipvs
*ipvs
, struct ip_vs_app
*app
);
1326 void unregister_ip_vs_app(struct netns_ipvs
*ipvs
, struct ip_vs_app
*app
);
1327 int ip_vs_bind_app(struct ip_vs_conn
*cp
, struct ip_vs_protocol
*pp
);
1328 void ip_vs_unbind_app(struct ip_vs_conn
*cp
);
1329 int register_ip_vs_app_inc(struct netns_ipvs
*ipvs
, struct ip_vs_app
*app
, __u16 proto
,
1331 int ip_vs_app_inc_get(struct ip_vs_app
*inc
);
1332 void ip_vs_app_inc_put(struct ip_vs_app
*inc
);
1334 int ip_vs_app_pkt_out(struct ip_vs_conn
*, struct sk_buff
*skb
);
1335 int ip_vs_app_pkt_in(struct ip_vs_conn
*, struct sk_buff
*skb
);
1337 int register_ip_vs_pe(struct ip_vs_pe
*pe
);
1338 int unregister_ip_vs_pe(struct ip_vs_pe
*pe
);
1339 struct ip_vs_pe
*ip_vs_pe_getbyname(const char *name
);
1340 struct ip_vs_pe
*__ip_vs_pe_getbyname(const char *pe_name
);
1342 /* Use a #define to avoid all of module.h just for these trivial ops */
1343 #define ip_vs_pe_get(pe) \
1344 if (pe && pe->module) \
1345 __module_get(pe->module);
1347 #define ip_vs_pe_put(pe) \
1348 if (pe && pe->module) \
1349 module_put(pe->module);
1351 /* IPVS protocol functions (from ip_vs_proto.c) */
1352 int ip_vs_protocol_init(void);
1353 void ip_vs_protocol_cleanup(void);
1354 void ip_vs_protocol_timeout_change(struct netns_ipvs
*ipvs
, int flags
);
1355 int *ip_vs_create_timeout_table(int *table
, int size
);
1356 void ip_vs_tcpudp_debug_packet(int af
, struct ip_vs_protocol
*pp
,
1357 const struct sk_buff
*skb
, int offset
,
1360 extern struct ip_vs_protocol ip_vs_protocol_tcp
;
1361 extern struct ip_vs_protocol ip_vs_protocol_udp
;
1362 extern struct ip_vs_protocol ip_vs_protocol_icmp
;
1363 extern struct ip_vs_protocol ip_vs_protocol_esp
;
1364 extern struct ip_vs_protocol ip_vs_protocol_ah
;
1365 extern struct ip_vs_protocol ip_vs_protocol_sctp
;
1367 /* Registering/unregistering scheduler functions
1368 * (from ip_vs_sched.c)
1370 int register_ip_vs_scheduler(struct ip_vs_scheduler
*scheduler
);
1371 int unregister_ip_vs_scheduler(struct ip_vs_scheduler
*scheduler
);
1372 int ip_vs_bind_scheduler(struct ip_vs_service
*svc
,
1373 struct ip_vs_scheduler
*scheduler
);
1374 void ip_vs_unbind_scheduler(struct ip_vs_service
*svc
,
1375 struct ip_vs_scheduler
*sched
);
1376 struct ip_vs_scheduler
*ip_vs_scheduler_get(const char *sched_name
);
1377 void ip_vs_scheduler_put(struct ip_vs_scheduler
*scheduler
);
1379 ip_vs_schedule(struct ip_vs_service
*svc
, struct sk_buff
*skb
,
1380 struct ip_vs_proto_data
*pd
, int *ignored
,
1381 struct ip_vs_iphdr
*iph
);
1382 int ip_vs_leave(struct ip_vs_service
*svc
, struct sk_buff
*skb
,
1383 struct ip_vs_proto_data
*pd
, struct ip_vs_iphdr
*iph
);
1385 void ip_vs_scheduler_err(struct ip_vs_service
*svc
, const char *msg
);
1387 /* IPVS control data and functions (from ip_vs_ctl.c) */
1388 extern struct ip_vs_stats ip_vs_stats
;
1389 extern int sysctl_ip_vs_sync_ver
;
1391 struct ip_vs_service
*
1392 ip_vs_service_find(struct netns_ipvs
*ipvs
, int af
, __u32 fwmark
, __u16 protocol
,
1393 const union nf_inet_addr
*vaddr
, __be16 vport
);
1395 bool ip_vs_has_real_service(struct netns_ipvs
*ipvs
, int af
, __u16 protocol
,
1396 const union nf_inet_addr
*daddr
, __be16 dport
);
1399 ip_vs_find_real_service(struct netns_ipvs
*ipvs
, int af
, __u16 protocol
,
1400 const union nf_inet_addr
*daddr
, __be16 dport
);
1402 int ip_vs_use_count_inc(void);
1403 void ip_vs_use_count_dec(void);
1404 int ip_vs_register_nl_ioctl(void);
1405 void ip_vs_unregister_nl_ioctl(void);
1406 int ip_vs_control_init(void);
1407 void ip_vs_control_cleanup(void);
1409 ip_vs_find_dest(struct netns_ipvs
*ipvs
, int svc_af
, int dest_af
,
1410 const union nf_inet_addr
*daddr
, __be16 dport
,
1411 const union nf_inet_addr
*vaddr
, __be16 vport
,
1412 __u16 protocol
, __u32 fwmark
, __u32 flags
);
1413 void ip_vs_try_bind_dest(struct ip_vs_conn
*cp
);
1415 static inline void ip_vs_dest_hold(struct ip_vs_dest
*dest
)
1417 refcount_inc(&dest
->refcnt
);
1420 static inline void ip_vs_dest_put(struct ip_vs_dest
*dest
)
1422 smp_mb__before_atomic();
1423 refcount_dec(&dest
->refcnt
);
1426 static inline void ip_vs_dest_put_and_free(struct ip_vs_dest
*dest
)
1428 if (refcount_dec_and_test(&dest
->refcnt
))
1432 /* IPVS sync daemon data and function prototypes
1433 * (from ip_vs_sync.c)
1435 int start_sync_thread(struct netns_ipvs
*ipvs
, struct ipvs_sync_daemon_cfg
*cfg
,
1437 int stop_sync_thread(struct netns_ipvs
*ipvs
, int state
);
1438 void ip_vs_sync_conn(struct netns_ipvs
*ipvs
, struct ip_vs_conn
*cp
, int pkts
);
1440 /* IPVS rate estimator prototypes (from ip_vs_est.c) */
1441 void ip_vs_start_estimator(struct netns_ipvs
*ipvs
, struct ip_vs_stats
*stats
);
1442 void ip_vs_stop_estimator(struct netns_ipvs
*ipvs
, struct ip_vs_stats
*stats
);
1443 void ip_vs_zero_estimator(struct ip_vs_stats
*stats
);
1444 void ip_vs_read_estimator(struct ip_vs_kstats
*dst
, struct ip_vs_stats
*stats
);
1446 /* Various IPVS packet transmitters (from ip_vs_xmit.c) */
1447 int ip_vs_null_xmit(struct sk_buff
*skb
, struct ip_vs_conn
*cp
,
1448 struct ip_vs_protocol
*pp
, struct ip_vs_iphdr
*iph
);
1449 int ip_vs_bypass_xmit(struct sk_buff
*skb
, struct ip_vs_conn
*cp
,
1450 struct ip_vs_protocol
*pp
, struct ip_vs_iphdr
*iph
);
1451 int ip_vs_nat_xmit(struct sk_buff
*skb
, struct ip_vs_conn
*cp
,
1452 struct ip_vs_protocol
*pp
, struct ip_vs_iphdr
*iph
);
1453 int ip_vs_tunnel_xmit(struct sk_buff
*skb
, struct ip_vs_conn
*cp
,
1454 struct ip_vs_protocol
*pp
, struct ip_vs_iphdr
*iph
);
1455 int ip_vs_dr_xmit(struct sk_buff
*skb
, struct ip_vs_conn
*cp
,
1456 struct ip_vs_protocol
*pp
, struct ip_vs_iphdr
*iph
);
1457 int ip_vs_icmp_xmit(struct sk_buff
*skb
, struct ip_vs_conn
*cp
,
1458 struct ip_vs_protocol
*pp
, int offset
,
1459 unsigned int hooknum
, struct ip_vs_iphdr
*iph
);
1460 void ip_vs_dest_dst_rcu_free(struct rcu_head
*head
);
1462 #ifdef CONFIG_IP_VS_IPV6
1463 int ip_vs_bypass_xmit_v6(struct sk_buff
*skb
, struct ip_vs_conn
*cp
,
1464 struct ip_vs_protocol
*pp
, struct ip_vs_iphdr
*iph
);
1465 int ip_vs_nat_xmit_v6(struct sk_buff
*skb
, struct ip_vs_conn
*cp
,
1466 struct ip_vs_protocol
*pp
, struct ip_vs_iphdr
*iph
);
1467 int ip_vs_tunnel_xmit_v6(struct sk_buff
*skb
, struct ip_vs_conn
*cp
,
1468 struct ip_vs_protocol
*pp
, struct ip_vs_iphdr
*iph
);
1469 int ip_vs_dr_xmit_v6(struct sk_buff
*skb
, struct ip_vs_conn
*cp
,
1470 struct ip_vs_protocol
*pp
, struct ip_vs_iphdr
*iph
);
1471 int ip_vs_icmp_xmit_v6(struct sk_buff
*skb
, struct ip_vs_conn
*cp
,
1472 struct ip_vs_protocol
*pp
, int offset
,
1473 unsigned int hooknum
, struct ip_vs_iphdr
*iph
);
1476 #ifdef CONFIG_SYSCTL
1477 /* This is a simple mechanism to ignore packets when
1478 * we are loaded. Just set ip_vs_drop_rate to 'n' and
1479 * we start to drop 1/rate of the packets
1481 static inline int ip_vs_todrop(struct netns_ipvs
*ipvs
)
1483 if (!ipvs
->drop_rate
)
1485 if (--ipvs
->drop_counter
> 0)
1487 ipvs
->drop_counter
= ipvs
->drop_rate
;
1491 static inline int ip_vs_todrop(struct netns_ipvs
*ipvs
) { return 0; }
1494 /* ip_vs_fwd_tag returns the forwarding tag of the connection */
1495 #define IP_VS_FWD_METHOD(cp) (cp->flags & IP_VS_CONN_F_FWD_MASK)
1497 static inline char ip_vs_fwd_tag(struct ip_vs_conn
*cp
)
1501 switch (IP_VS_FWD_METHOD(cp
)) {
1502 case IP_VS_CONN_F_MASQ
:
1504 case IP_VS_CONN_F_LOCALNODE
:
1506 case IP_VS_CONN_F_TUNNEL
:
1508 case IP_VS_CONN_F_DROUTE
:
1510 case IP_VS_CONN_F_BYPASS
:
1518 void ip_vs_nat_icmp(struct sk_buff
*skb
, struct ip_vs_protocol
*pp
,
1519 struct ip_vs_conn
*cp
, int dir
);
1521 #ifdef CONFIG_IP_VS_IPV6
1522 void ip_vs_nat_icmp_v6(struct sk_buff
*skb
, struct ip_vs_protocol
*pp
,
1523 struct ip_vs_conn
*cp
, int dir
);
1526 __sum16
ip_vs_checksum_complete(struct sk_buff
*skb
, int offset
);
1528 static inline __wsum
ip_vs_check_diff4(__be32 old
, __be32
new, __wsum oldsum
)
1530 __be32 diff
[2] = { ~old
, new };
1532 return csum_partial(diff
, sizeof(diff
), oldsum
);
1535 #ifdef CONFIG_IP_VS_IPV6
1536 static inline __wsum
ip_vs_check_diff16(const __be32
*old
, const __be32
*new,
1539 __be32 diff
[8] = { ~old
[3], ~old
[2], ~old
[1], ~old
[0],
1540 new[3], new[2], new[1], new[0] };
1542 return csum_partial(diff
, sizeof(diff
), oldsum
);
1546 static inline __wsum
ip_vs_check_diff2(__be16 old
, __be16
new, __wsum oldsum
)
1548 __be16 diff
[2] = { ~old
, new };
1550 return csum_partial(diff
, sizeof(diff
), oldsum
);
1553 /* Forget current conntrack (unconfirmed) and attach notrack entry */
1554 static inline void ip_vs_notrack(struct sk_buff
*skb
)
1556 #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
1557 enum ip_conntrack_info ctinfo
;
1558 struct nf_conn
*ct
= nf_ct_get(skb
, &ctinfo
);
1561 nf_conntrack_put(&ct
->ct_general
);
1562 nf_ct_set(skb
, NULL
, IP_CT_UNTRACKED
);
1567 #ifdef CONFIG_IP_VS_NFCT
1568 /* Netfilter connection tracking
1569 * (from ip_vs_nfct.c)
1571 static inline int ip_vs_conntrack_enabled(struct netns_ipvs
*ipvs
)
1573 #ifdef CONFIG_SYSCTL
1574 return ipvs
->sysctl_conntrack
;
1580 void ip_vs_update_conntrack(struct sk_buff
*skb
, struct ip_vs_conn
*cp
,
1582 int ip_vs_confirm_conntrack(struct sk_buff
*skb
);
1583 void ip_vs_nfct_expect_related(struct sk_buff
*skb
, struct nf_conn
*ct
,
1584 struct ip_vs_conn
*cp
, u_int8_t proto
,
1585 const __be16 port
, int from_rs
);
1586 void ip_vs_conn_drop_conntrack(struct ip_vs_conn
*cp
);
1590 static inline int ip_vs_conntrack_enabled(struct netns_ipvs
*ipvs
)
1595 static inline void ip_vs_update_conntrack(struct sk_buff
*skb
,
1596 struct ip_vs_conn
*cp
, int outin
)
1600 static inline int ip_vs_confirm_conntrack(struct sk_buff
*skb
)
1605 static inline void ip_vs_conn_drop_conntrack(struct ip_vs_conn
*cp
)
1608 #endif /* CONFIG_IP_VS_NFCT */
1610 /* Really using conntrack? */
1611 static inline bool ip_vs_conn_uses_conntrack(struct ip_vs_conn
*cp
,
1612 struct sk_buff
*skb
)
1614 #ifdef CONFIG_IP_VS_NFCT
1615 enum ip_conntrack_info ctinfo
;
1618 if (!(cp
->flags
& IP_VS_CONN_F_NFCT
))
1620 ct
= nf_ct_get(skb
, &ctinfo
);
1628 ip_vs_dest_conn_overhead(struct ip_vs_dest
*dest
)
1630 /* We think the overhead of processing active connections is 256
1631 * times higher than that of inactive connections in average. (This
1632 * 256 times might not be accurate, we will change it later) We
1633 * use the following formula to estimate the overhead now:
1634 * dest->activeconns*256 + dest->inactconns
1636 return (atomic_read(&dest
->activeconns
) << 8) +
1637 atomic_read(&dest
->inactconns
);
1640 #endif /* _NET_IP_VS_H */