2 * data structure and functionality definitions
8 #include <linux/ip_vs.h> /* definitions shared with userland */
10 #include <asm/types.h> /* for __uXX types */
12 #include <linux/list.h> /* for struct list_head */
13 #include <linux/spinlock.h> /* for struct rwlock_t */
14 #include <linux/atomic.h> /* for struct atomic_t */
15 #include <linux/compiler.h>
16 #include <linux/timer.h>
17 #include <linux/bug.h>
19 #include <net/checksum.h>
20 #include <linux/netfilter.h> /* for union nf_inet_addr */
22 #include <linux/ipv6.h> /* for struct ipv6hdr */
24 #if IS_ENABLED(CONFIG_IP_VS_IPV6)
25 #include <linux/netfilter_ipv6/ip6_tables.h>
27 #if IS_ENABLED(CONFIG_NF_CONNTRACK)
28 #include <net/netfilter/nf_conntrack.h>
30 #include <net/net_namespace.h> /* Netw namespace */
32 #define IP_VS_HDR_INVERSE 1
33 #define IP_VS_HDR_ICMP 2
35 /* Generic access of ipvs struct */
36 static inline struct netns_ipvs
*net_ipvs(struct net
* net
)
41 /* Get net ptr from skb in traffic cases
42 * use skb_sknet when call is from userland (ioctl or netlink)
44 static inline struct net
*skb_net(const struct sk_buff
*skb
)
47 #ifdef CONFIG_IP_VS_DEBUG
49 * This is used for debug only.
50 * Start with the most likely hit
53 if (likely(skb
->dev
&& dev_net(skb
->dev
)))
54 return dev_net(skb
->dev
);
55 if (skb_dst(skb
) && skb_dst(skb
)->dev
)
56 return dev_net(skb_dst(skb
)->dev
);
57 WARN(skb
->sk
, "Maybe skb_sknet should be used in %s() at line:%d\n",
59 if (likely(skb
->sk
&& sock_net(skb
->sk
)))
60 return sock_net(skb
->sk
);
61 pr_err("There is no net ptr to find in the skb in %s() line:%d\n",
65 return dev_net(skb
->dev
? : skb_dst(skb
)->dev
);
72 static inline struct net
*skb_sknet(const struct sk_buff
*skb
)
75 #ifdef CONFIG_IP_VS_DEBUG
76 /* Start with the most likely hit */
77 if (likely(skb
->sk
&& sock_net(skb
->sk
)))
78 return sock_net(skb
->sk
);
79 WARN(skb
->dev
, "Maybe skb_net should be used instead in %s() line:%d\n",
81 if (likely(skb
->dev
&& dev_net(skb
->dev
)))
82 return dev_net(skb
->dev
);
83 pr_err("There is no net ptr to find in the skb in %s() line:%d\n",
87 return sock_net(skb
->sk
);
94 /* This one needed for single_open_net since net is stored directly in
95 * private not as a struct i.e. seq_file_net can't be used.
97 static inline struct net
*seq_file_single_net(struct seq_file
*seq
)
100 return (struct net
*)seq
->private;
106 /* Connections' size value needed by ip_vs_ctl.c */
107 extern int ip_vs_conn_tab_size
;
110 int hdr_flags
; /* ipvs flags */
111 __u32 off
; /* Where IP or IPv4 header starts */
112 __u32 len
; /* IPv4 simply where L4 starts
113 * IPv6 where L4 Transport Header starts */
114 __u16 fragoffs
; /* IPv6 fragment offset, 0 if first frag (or not frag)*/
117 union nf_inet_addr saddr
;
118 union nf_inet_addr daddr
;
121 static inline void *frag_safe_skb_hp(const struct sk_buff
*skb
, int offset
,
122 int len
, void *buffer
,
123 const struct ip_vs_iphdr
*ipvsh
)
125 return skb_header_pointer(skb
, offset
, len
, buffer
);
128 /* This function handles filling *ip_vs_iphdr, both for IPv4 and IPv6.
129 * IPv6 requires some extra work, as finding proper header position,
130 * depend on the IPv6 extension headers.
133 ip_vs_fill_iph_skb_off(int af
, const struct sk_buff
*skb
, int offset
,
134 int hdr_flags
, struct ip_vs_iphdr
*iphdr
)
136 iphdr
->hdr_flags
= hdr_flags
;
139 #ifdef CONFIG_IP_VS_IPV6
140 if (af
== AF_INET6
) {
142 const struct ipv6hdr
*iph
= skb_header_pointer(
143 skb
, offset
, sizeof(_iph
), &_iph
);
147 iphdr
->saddr
.in6
= iph
->saddr
;
148 iphdr
->daddr
.in6
= iph
->daddr
;
149 /* ipv6_find_hdr() updates len, flags */
152 iphdr
->protocol
= ipv6_find_hdr(skb
, &iphdr
->len
, -1,
155 if (iphdr
->protocol
< 0)
161 const struct iphdr
*iph
= skb_header_pointer(
162 skb
, offset
, sizeof(_iph
), &_iph
);
166 iphdr
->len
= offset
+ iph
->ihl
* 4;
168 iphdr
->protocol
= iph
->protocol
;
169 iphdr
->saddr
.ip
= iph
->saddr
;
170 iphdr
->daddr
.ip
= iph
->daddr
;
177 ip_vs_fill_iph_skb_icmp(int af
, const struct sk_buff
*skb
, int offset
,
178 bool inverse
, struct ip_vs_iphdr
*iphdr
)
180 int hdr_flags
= IP_VS_HDR_ICMP
;
183 hdr_flags
|= IP_VS_HDR_INVERSE
;
185 return ip_vs_fill_iph_skb_off(af
, skb
, offset
, hdr_flags
, iphdr
);
189 ip_vs_fill_iph_skb(int af
, const struct sk_buff
*skb
, bool inverse
,
190 struct ip_vs_iphdr
*iphdr
)
195 hdr_flags
|= IP_VS_HDR_INVERSE
;
197 return ip_vs_fill_iph_skb_off(af
, skb
, skb_network_offset(skb
),
202 ip_vs_iph_inverse(const struct ip_vs_iphdr
*iph
)
204 return !!(iph
->hdr_flags
& IP_VS_HDR_INVERSE
);
208 ip_vs_iph_icmp(const struct ip_vs_iphdr
*iph
)
210 return !!(iph
->hdr_flags
& IP_VS_HDR_ICMP
);
213 static inline void ip_vs_addr_copy(int af
, union nf_inet_addr
*dst
,
214 const union nf_inet_addr
*src
)
216 #ifdef CONFIG_IP_VS_IPV6
224 static inline void ip_vs_addr_set(int af
, union nf_inet_addr
*dst
,
225 const union nf_inet_addr
*src
)
227 #ifdef CONFIG_IP_VS_IPV6
228 if (af
== AF_INET6
) {
239 static inline int ip_vs_addr_equal(int af
, const union nf_inet_addr
*a
,
240 const union nf_inet_addr
*b
)
242 #ifdef CONFIG_IP_VS_IPV6
244 return ipv6_addr_equal(&a
->in6
, &b
->in6
);
246 return a
->ip
== b
->ip
;
249 #ifdef CONFIG_IP_VS_DEBUG
250 #include <linux/net.h>
252 int ip_vs_get_debug_level(void);
254 static inline const char *ip_vs_dbg_addr(int af
, char *buf
, size_t buf_len
,
255 const union nf_inet_addr
*addr
,
259 #ifdef CONFIG_IP_VS_IPV6
261 len
= snprintf(&buf
[*idx
], buf_len
- *idx
, "[%pI6c]",
265 len
= snprintf(&buf
[*idx
], buf_len
- *idx
, "%pI4",
269 BUG_ON(*idx
> buf_len
+ 1);
270 return &buf
[*idx
- len
];
273 #define IP_VS_DBG_BUF(level, msg, ...) \
275 char ip_vs_dbg_buf[160]; \
276 int ip_vs_dbg_idx = 0; \
277 if (level <= ip_vs_get_debug_level()) \
278 printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \
280 #define IP_VS_ERR_BUF(msg...) \
282 char ip_vs_dbg_buf[160]; \
283 int ip_vs_dbg_idx = 0; \
287 /* Only use from within IP_VS_DBG_BUF() or IP_VS_ERR_BUF macros */
288 #define IP_VS_DBG_ADDR(af, addr) \
289 ip_vs_dbg_addr(af, ip_vs_dbg_buf, \
290 sizeof(ip_vs_dbg_buf), addr, \
293 #define IP_VS_DBG(level, msg, ...) \
295 if (level <= ip_vs_get_debug_level()) \
296 printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \
298 #define IP_VS_DBG_RL(msg, ...) \
300 if (net_ratelimit()) \
301 printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \
303 #define IP_VS_DBG_PKT(level, af, pp, skb, ofs, msg) \
305 if (level <= ip_vs_get_debug_level()) \
306 pp->debug_packet(af, pp, skb, ofs, msg); \
308 #define IP_VS_DBG_RL_PKT(level, af, pp, skb, ofs, msg) \
310 if (level <= ip_vs_get_debug_level() && \
312 pp->debug_packet(af, pp, skb, ofs, msg); \
314 #else /* NO DEBUGGING at ALL */
315 #define IP_VS_DBG_BUF(level, msg...) do {} while (0)
316 #define IP_VS_ERR_BUF(msg...) do {} while (0)
317 #define IP_VS_DBG(level, msg...) do {} while (0)
318 #define IP_VS_DBG_RL(msg...) do {} while (0)
319 #define IP_VS_DBG_PKT(level, af, pp, skb, ofs, msg) do {} while (0)
320 #define IP_VS_DBG_RL_PKT(level, af, pp, skb, ofs, msg) do {} while (0)
323 #define IP_VS_BUG() BUG()
324 #define IP_VS_ERR_RL(msg, ...) \
326 if (net_ratelimit()) \
327 pr_err(msg, ##__VA_ARGS__); \
330 #ifdef CONFIG_IP_VS_DEBUG
331 #define EnterFunction(level) \
333 if (level <= ip_vs_get_debug_level()) \
335 pr_fmt("Enter: %s, %s line %i\n"), \
336 __func__, __FILE__, __LINE__); \
338 #define LeaveFunction(level) \
340 if (level <= ip_vs_get_debug_level()) \
342 pr_fmt("Leave: %s, %s line %i\n"), \
343 __func__, __FILE__, __LINE__); \
346 #define EnterFunction(level) do {} while (0)
347 #define LeaveFunction(level) do {} while (0)
350 /* The port number of FTP service (in network order). */
351 #define FTPPORT cpu_to_be16(21)
352 #define FTPDATA cpu_to_be16(20)
354 /* TCP State Values */
356 IP_VS_TCP_S_NONE
= 0,
357 IP_VS_TCP_S_ESTABLISHED
,
358 IP_VS_TCP_S_SYN_SENT
,
359 IP_VS_TCP_S_SYN_RECV
,
360 IP_VS_TCP_S_FIN_WAIT
,
361 IP_VS_TCP_S_TIME_WAIT
,
363 IP_VS_TCP_S_CLOSE_WAIT
,
364 IP_VS_TCP_S_LAST_ACK
,
370 /* UDP State Values */
376 /* ICMP State Values */
382 /* SCTP State Values */
383 enum ip_vs_sctp_states
{
387 IP_VS_SCTP_S_COOKIE_SENT
,
388 IP_VS_SCTP_S_COOKIE_REPLIED
,
389 IP_VS_SCTP_S_COOKIE_WAIT
,
391 IP_VS_SCTP_S_COOKIE_ECHOED
,
392 IP_VS_SCTP_S_ESTABLISHED
,
393 IP_VS_SCTP_S_SHUTDOWN_SENT
,
394 IP_VS_SCTP_S_SHUTDOWN_RECEIVED
,
395 IP_VS_SCTP_S_SHUTDOWN_ACK_SENT
,
396 IP_VS_SCTP_S_REJECTED
,
401 /* Delta sequence info structure
402 * Each ip_vs_conn has 2 (output AND input seq. changes).
403 * Only used in the VS/NAT.
406 __u32 init_seq
; /* Add delta from this seq */
407 __u32 delta
; /* Delta in sequence numbers */
408 __u32 previous_delta
; /* Delta in sequence numbers
409 * before last resized pkt */
412 /* counters per cpu */
413 struct ip_vs_counters
{
414 __u64 conns
; /* connections scheduled */
415 __u64 inpkts
; /* incoming packets */
416 __u64 outpkts
; /* outgoing packets */
417 __u64 inbytes
; /* incoming bytes */
418 __u64 outbytes
; /* outgoing bytes */
421 struct ip_vs_cpu_stats
{
422 struct ip_vs_counters cnt
;
423 struct u64_stats_sync syncp
;
426 /* IPVS statistics objects */
427 struct ip_vs_estimator
{
428 struct list_head list
;
444 * IPVS statistics object, 64-bit kernel version of struct ip_vs_stats_user
446 struct ip_vs_kstats
{
447 u64 conns
; /* connections scheduled */
448 u64 inpkts
; /* incoming packets */
449 u64 outpkts
; /* outgoing packets */
450 u64 inbytes
; /* incoming bytes */
451 u64 outbytes
; /* outgoing bytes */
453 u64 cps
; /* current connection rate */
454 u64 inpps
; /* current in packet rate */
455 u64 outpps
; /* current out packet rate */
456 u64 inbps
; /* current in byte rate */
457 u64 outbps
; /* current out byte rate */
461 struct ip_vs_kstats kstats
; /* kernel statistics */
462 struct ip_vs_estimator est
; /* estimator */
463 struct ip_vs_cpu_stats __percpu
*cpustats
; /* per cpu counters */
464 spinlock_t lock
; /* spin lock */
465 struct ip_vs_kstats kstats0
; /* reset values */
473 struct ip_vs_proto_data
;
475 struct ip_vs_protocol
{
476 struct ip_vs_protocol
*next
;
482 void (*init
)(struct ip_vs_protocol
*pp
);
484 void (*exit
)(struct ip_vs_protocol
*pp
);
486 int (*init_netns
)(struct netns_ipvs
*ipvs
, struct ip_vs_proto_data
*pd
);
488 void (*exit_netns
)(struct netns_ipvs
*ipvs
, struct ip_vs_proto_data
*pd
);
490 int (*conn_schedule
)(struct netns_ipvs
*ipvs
,
491 int af
, struct sk_buff
*skb
,
492 struct ip_vs_proto_data
*pd
,
493 int *verdict
, struct ip_vs_conn
**cpp
,
494 struct ip_vs_iphdr
*iph
);
497 (*conn_in_get
)(struct netns_ipvs
*ipvs
,
499 const struct sk_buff
*skb
,
500 const struct ip_vs_iphdr
*iph
);
503 (*conn_out_get
)(struct netns_ipvs
*ipvs
,
505 const struct sk_buff
*skb
,
506 const struct ip_vs_iphdr
*iph
);
508 int (*snat_handler
)(struct sk_buff
*skb
, struct ip_vs_protocol
*pp
,
509 struct ip_vs_conn
*cp
, struct ip_vs_iphdr
*iph
);
511 int (*dnat_handler
)(struct sk_buff
*skb
, struct ip_vs_protocol
*pp
,
512 struct ip_vs_conn
*cp
, struct ip_vs_iphdr
*iph
);
514 int (*csum_check
)(int af
, struct sk_buff
*skb
,
515 struct ip_vs_protocol
*pp
);
517 const char *(*state_name
)(int state
);
519 void (*state_transition
)(struct ip_vs_conn
*cp
, int direction
,
520 const struct sk_buff
*skb
,
521 struct ip_vs_proto_data
*pd
);
523 int (*register_app
)(struct netns_ipvs
*ipvs
, struct ip_vs_app
*inc
);
525 void (*unregister_app
)(struct netns_ipvs
*ipvs
, struct ip_vs_app
*inc
);
527 int (*app_conn_bind
)(struct ip_vs_conn
*cp
);
529 void (*debug_packet
)(int af
, struct ip_vs_protocol
*pp
,
530 const struct sk_buff
*skb
,
534 void (*timeout_change
)(struct ip_vs_proto_data
*pd
, int flags
);
537 /* protocol data per netns */
538 struct ip_vs_proto_data
{
539 struct ip_vs_proto_data
*next
;
540 struct ip_vs_protocol
*pp
;
541 int *timeout_table
; /* protocol timeout table */
542 atomic_t appcnt
; /* counter of proto app incs. */
543 struct tcp_states_t
*tcp_state_table
;
546 struct ip_vs_protocol
*ip_vs_proto_get(unsigned short proto
);
547 struct ip_vs_proto_data
*ip_vs_proto_data_get(struct netns_ipvs
*ipvs
,
548 unsigned short proto
);
550 struct ip_vs_conn_param
{
551 struct netns_ipvs
*ipvs
;
552 const union nf_inet_addr
*caddr
;
553 const union nf_inet_addr
*vaddr
;
559 const struct ip_vs_pe
*pe
;
564 /* IP_VS structure allocated for each dynamically scheduled connection */
566 struct hlist_node c_list
; /* hashed list heads */
567 /* Protocol, addresses and port numbers */
571 u16 af
; /* address family */
572 union nf_inet_addr caddr
; /* client address */
573 union nf_inet_addr vaddr
; /* virtual address */
574 union nf_inet_addr daddr
; /* destination address */
575 volatile __u32 flags
; /* status flags */
576 __u16 protocol
; /* Which protocol (TCP/UDP) */
577 __u16 daf
; /* Address family of the dest */
578 struct netns_ipvs
*ipvs
;
580 /* counter and timer */
581 atomic_t refcnt
; /* reference count */
582 struct timer_list timer
; /* Expiration timer */
583 volatile unsigned long timeout
; /* timeout */
585 /* Flags and state transition */
586 spinlock_t lock
; /* lock for state transition */
587 volatile __u16 state
; /* state info */
588 volatile __u16 old_state
; /* old state, to be used for
589 * state transition triggerd
592 __u32 fwmark
; /* Fire wall mark from skb */
593 unsigned long sync_endtime
; /* jiffies + sent_retries */
595 /* Control members */
596 struct ip_vs_conn
*control
; /* Master control connection */
597 atomic_t n_control
; /* Number of controlled ones */
598 struct ip_vs_dest
*dest
; /* real server */
599 atomic_t in_pkts
; /* incoming packet counter */
601 /* Packet transmitter for different forwarding methods. If it
602 * mangles the packet, it must return NF_DROP or better NF_STOLEN,
603 * otherwise this must be changed to a sk_buff **.
604 * NF_ACCEPT can be returned when destination is local.
606 int (*packet_xmit
)(struct sk_buff
*skb
, struct ip_vs_conn
*cp
,
607 struct ip_vs_protocol
*pp
, struct ip_vs_iphdr
*iph
);
609 /* Note: we can group the following members into a structure,
610 * in order to save more space, and the following members are
611 * only used in VS/NAT anyway
613 struct ip_vs_app
*app
; /* bound ip_vs_app object */
614 void *app_data
; /* Application private data */
615 struct ip_vs_seq in_seq
; /* incoming seq. struct */
616 struct ip_vs_seq out_seq
; /* outgoing seq. struct */
618 const struct ip_vs_pe
*pe
;
622 struct rcu_head rcu_head
;
625 /* Extended internal versions of struct ip_vs_service_user and ip_vs_dest_user
628 * We need these to conveniently pass around service and destination
629 * options, but unfortunately, we also need to keep the old definitions to
630 * maintain userspace backwards compatibility for the setsockopt interface.
632 struct ip_vs_service_user_kern
{
633 /* virtual service addresses */
636 union nf_inet_addr addr
; /* virtual ip address */
638 u32 fwmark
; /* firwall mark of service */
640 /* virtual service options */
643 unsigned int flags
; /* virtual service flags */
644 unsigned int timeout
; /* persistent timeout in sec */
645 __be32 netmask
; /* persistent netmask or plen */
649 struct ip_vs_dest_user_kern
{
650 /* destination server address */
651 union nf_inet_addr addr
;
654 /* real server options */
655 unsigned int conn_flags
; /* connection flags */
656 int weight
; /* destination weight */
658 /* thresholds for active connections */
659 u32 u_threshold
; /* upper threshold */
660 u32 l_threshold
; /* lower threshold */
662 /* Address family of addr */
668 * The information about the virtual service offered to the net and the
669 * forwarding entries.
671 struct ip_vs_service
{
672 struct hlist_node s_list
; /* for normal service table */
673 struct hlist_node f_list
; /* for fwmark-based service table */
674 atomic_t refcnt
; /* reference counter */
676 u16 af
; /* address family */
677 __u16 protocol
; /* which protocol (TCP/UDP) */
678 union nf_inet_addr addr
; /* IP address for virtual service */
679 __be16 port
; /* port number for the service */
680 __u32 fwmark
; /* firewall mark of the service */
681 unsigned int flags
; /* service status flags */
682 unsigned int timeout
; /* persistent timeout in ticks */
683 __be32 netmask
; /* grouping granularity, mask/plen */
684 struct netns_ipvs
*ipvs
;
686 struct list_head destinations
; /* real server d-linked list */
687 __u32 num_dests
; /* number of servers */
688 struct ip_vs_stats stats
; /* statistics for the service */
691 struct ip_vs_scheduler __rcu
*scheduler
; /* bound scheduler object */
692 spinlock_t sched_lock
; /* lock sched_data */
693 void *sched_data
; /* scheduler application data */
695 /* alternate persistence engine */
696 struct ip_vs_pe __rcu
*pe
;
698 struct rcu_head rcu_head
;
701 /* Information for cached dst */
702 struct ip_vs_dest_dst
{
703 struct dst_entry
*dst_cache
; /* destination cache entry */
705 union nf_inet_addr dst_saddr
;
706 struct rcu_head rcu_head
;
709 /* The real server destination forwarding entry with ip address, port number,
713 struct list_head n_list
; /* for the dests in the service */
714 struct hlist_node d_list
; /* for table with all the dests */
716 u16 af
; /* address family */
717 __be16 port
; /* port number of the server */
718 union nf_inet_addr addr
; /* IP address of the server */
719 volatile unsigned int flags
; /* dest status flags */
720 atomic_t conn_flags
; /* flags to copy to conn */
721 atomic_t weight
; /* server weight */
723 atomic_t refcnt
; /* reference counter */
724 struct ip_vs_stats stats
; /* statistics */
725 unsigned long idle_start
; /* start time, jiffies */
727 /* connection counters and thresholds */
728 atomic_t activeconns
; /* active connections */
729 atomic_t inactconns
; /* inactive connections */
730 atomic_t persistconns
; /* persistent connections */
731 __u32 u_threshold
; /* upper threshold */
732 __u32 l_threshold
; /* lower threshold */
734 /* for destination cache */
735 spinlock_t dst_lock
; /* lock of dst_cache */
736 struct ip_vs_dest_dst __rcu
*dest_dst
; /* cached dst info */
738 /* for virtual service */
739 struct ip_vs_service __rcu
*svc
; /* service it belongs to */
740 __u16 protocol
; /* which protocol (TCP/UDP) */
741 __be16 vport
; /* virtual port number */
742 union nf_inet_addr vaddr
; /* virtual IP address */
743 __u32 vfwmark
; /* firewall mark of service */
745 struct list_head t_list
; /* in dest_trash */
746 unsigned int in_rs_table
:1; /* we are in rs_table */
749 /* The scheduler object */
750 struct ip_vs_scheduler
{
751 struct list_head n_list
; /* d-linked list head */
752 char *name
; /* scheduler name */
753 atomic_t refcnt
; /* reference counter */
754 struct module
*module
; /* THIS_MODULE/NULL */
756 /* scheduler initializing service */
757 int (*init_service
)(struct ip_vs_service
*svc
);
758 /* scheduling service finish */
759 void (*done_service
)(struct ip_vs_service
*svc
);
761 int (*add_dest
)(struct ip_vs_service
*svc
, struct ip_vs_dest
*dest
);
762 /* dest is unlinked */
763 int (*del_dest
)(struct ip_vs_service
*svc
, struct ip_vs_dest
*dest
);
764 /* dest is updated */
765 int (*upd_dest
)(struct ip_vs_service
*svc
, struct ip_vs_dest
*dest
);
767 /* selecting a server from the given service */
768 struct ip_vs_dest
* (*schedule
)(struct ip_vs_service
*svc
,
769 const struct sk_buff
*skb
,
770 struct ip_vs_iphdr
*iph
);
773 /* The persistence engine object */
775 struct list_head n_list
; /* d-linked list head */
776 char *name
; /* scheduler name */
777 atomic_t refcnt
; /* reference counter */
778 struct module
*module
; /* THIS_MODULE/NULL */
780 /* get the connection template, if any */
781 int (*fill_param
)(struct ip_vs_conn_param
*p
, struct sk_buff
*skb
);
782 bool (*ct_match
)(const struct ip_vs_conn_param
*p
,
783 struct ip_vs_conn
*ct
);
784 u32 (*hashkey_raw
)(const struct ip_vs_conn_param
*p
, u32 initval
,
786 int (*show_pe_data
)(const struct ip_vs_conn
*cp
, char *buf
);
789 /* The application module object (a.k.a. app incarnation) */
791 struct list_head a_list
; /* member in app list */
792 int type
; /* IP_VS_APP_TYPE_xxx */
793 char *name
; /* application module name */
795 struct module
*module
; /* THIS_MODULE/NULL */
796 struct list_head incs_list
; /* list of incarnations */
798 /* members for application incarnations */
799 struct list_head p_list
; /* member in proto app list */
800 struct ip_vs_app
*app
; /* its real application */
801 __be16 port
; /* port number in net order */
802 atomic_t usecnt
; /* usage counter */
803 struct rcu_head rcu_head
;
805 /* output hook: Process packet in inout direction, diff set for TCP.
806 * Return: 0=Error, 1=Payload Not Mangled/Mangled but checksum is ok,
807 * 2=Mangled but checksum was not updated
809 int (*pkt_out
)(struct ip_vs_app
*, struct ip_vs_conn
*,
810 struct sk_buff
*, int *diff
);
812 /* input hook: Process packet in outin direction, diff set for TCP.
813 * Return: 0=Error, 1=Payload Not Mangled/Mangled but checksum is ok,
814 * 2=Mangled but checksum was not updated
816 int (*pkt_in
)(struct ip_vs_app
*, struct ip_vs_conn
*,
817 struct sk_buff
*, int *diff
);
819 /* ip_vs_app initializer */
820 int (*init_conn
)(struct ip_vs_app
*, struct ip_vs_conn
*);
822 /* ip_vs_app finish */
823 int (*done_conn
)(struct ip_vs_app
*, struct ip_vs_conn
*);
827 int (*bind_conn
)(struct ip_vs_app
*, struct ip_vs_conn
*,
828 struct ip_vs_protocol
*);
830 void (*unbind_conn
)(struct ip_vs_app
*, struct ip_vs_conn
*);
836 int (*conn_schedule
)(struct sk_buff
*skb
, struct ip_vs_app
*app
,
837 int *verdict
, struct ip_vs_conn
**cpp
);
840 (*conn_in_get
)(const struct sk_buff
*skb
, struct ip_vs_app
*app
,
841 const struct iphdr
*iph
, int inverse
);
844 (*conn_out_get
)(const struct sk_buff
*skb
, struct ip_vs_app
*app
,
845 const struct iphdr
*iph
, int inverse
);
847 int (*state_transition
)(struct ip_vs_conn
*cp
, int direction
,
848 const struct sk_buff
*skb
,
849 struct ip_vs_app
*app
);
851 void (*timeout_change
)(struct ip_vs_app
*app
, int flags
);
854 struct ipvs_master_sync_state
{
855 struct list_head sync_queue
;
856 struct ip_vs_sync_buff
*sync_buff
;
857 unsigned long sync_queue_len
;
858 unsigned int sync_queue_delay
;
859 struct task_struct
*master_thread
;
860 struct delayed_work master_wakeup_work
;
861 struct netns_ipvs
*ipvs
;
864 /* How much time to keep dests in trash */
865 #define IP_VS_DEST_TRASH_PERIOD (120 * HZ)
867 struct ipvs_sync_daemon_cfg
{
868 union nf_inet_addr mcast_group
;
874 /* multicast interface name */
875 char mcast_ifn
[IP_VS_IFNAME_MAXLEN
];
878 /* IPVS in network namespace */
880 int gen
; /* Generation */
881 int enable
; /* enable like nf_hooks do */
882 /* Hash table: for real service lookups */
883 #define IP_VS_RTAB_BITS 4
884 #define IP_VS_RTAB_SIZE (1 << IP_VS_RTAB_BITS)
885 #define IP_VS_RTAB_MASK (IP_VS_RTAB_SIZE - 1)
887 struct hlist_head rs_table
[IP_VS_RTAB_SIZE
];
889 struct list_head app_list
;
891 #define IP_VS_PROTO_TAB_SIZE 32 /* must be power of 2 */
892 struct ip_vs_proto_data
*proto_data_table
[IP_VS_PROTO_TAB_SIZE
];
893 /* ip_vs_proto_tcp */
894 #ifdef CONFIG_IP_VS_PROTO_TCP
895 #define TCP_APP_TAB_BITS 4
896 #define TCP_APP_TAB_SIZE (1 << TCP_APP_TAB_BITS)
897 #define TCP_APP_TAB_MASK (TCP_APP_TAB_SIZE - 1)
898 struct list_head tcp_apps
[TCP_APP_TAB_SIZE
];
900 /* ip_vs_proto_udp */
901 #ifdef CONFIG_IP_VS_PROTO_UDP
902 #define UDP_APP_TAB_BITS 4
903 #define UDP_APP_TAB_SIZE (1 << UDP_APP_TAB_BITS)
904 #define UDP_APP_TAB_MASK (UDP_APP_TAB_SIZE - 1)
905 struct list_head udp_apps
[UDP_APP_TAB_SIZE
];
907 /* ip_vs_proto_sctp */
908 #ifdef CONFIG_IP_VS_PROTO_SCTP
909 #define SCTP_APP_TAB_BITS 4
910 #define SCTP_APP_TAB_SIZE (1 << SCTP_APP_TAB_BITS)
911 #define SCTP_APP_TAB_MASK (SCTP_APP_TAB_SIZE - 1)
912 /* Hash table for SCTP application incarnations */
913 struct list_head sctp_apps
[SCTP_APP_TAB_SIZE
];
916 atomic_t conn_count
; /* connection counter */
919 struct ip_vs_stats tot_stats
; /* Statistics & est. */
921 int num_services
; /* no of virtual services */
923 /* Trash for destinations */
924 struct list_head dest_trash
;
925 spinlock_t dest_trash_lock
;
926 struct timer_list dest_trash_timer
; /* expiration timer */
927 /* Service counters */
928 atomic_t ftpsvc_counter
;
929 atomic_t nullsvc_counter
;
932 /* 1/rate drop and drop-entry variables */
933 struct delayed_work defense_work
; /* Work handler */
938 spinlock_t dropentry_lock
; /* drop entry handling */
939 spinlock_t droppacket_lock
; /* drop packet handling */
940 spinlock_t securetcp_lock
; /* state and timeout tables */
943 struct ctl_table_header
*sysctl_hdr
;
944 struct ctl_table
*sysctl_tbl
;
947 /* sysctl variables */
948 int sysctl_amemthresh
;
949 int sysctl_am_droprate
;
950 int sysctl_drop_entry
;
951 int sysctl_drop_packet
;
952 int sysctl_secure_tcp
;
953 #ifdef CONFIG_IP_VS_NFCT
954 int sysctl_conntrack
;
956 int sysctl_snat_reroute
;
958 int sysctl_sync_ports
;
959 int sysctl_sync_persist_mode
;
960 unsigned long sysctl_sync_qlen_max
;
961 int sysctl_sync_sock_size
;
962 int sysctl_cache_bypass
;
963 int sysctl_expire_nodest_conn
;
964 int sysctl_sloppy_tcp
;
965 int sysctl_sloppy_sctp
;
966 int sysctl_expire_quiescent_template
;
967 int sysctl_sync_threshold
[2];
968 unsigned int sysctl_sync_refresh_period
;
969 int sysctl_sync_retries
;
970 int sysctl_nat_icmp_send
;
971 int sysctl_pmtu_disc
;
972 int sysctl_backup_only
;
973 int sysctl_conn_reuse_mode
;
974 int sysctl_schedule_icmp
;
975 int sysctl_ignore_tunneled
;
978 int sysctl_lblc_expiration
;
979 struct ctl_table_header
*lblc_ctl_header
;
980 struct ctl_table
*lblc_ctl_table
;
982 int sysctl_lblcr_expiration
;
983 struct ctl_table_header
*lblcr_ctl_header
;
984 struct ctl_table
*lblcr_ctl_table
;
986 struct list_head est_list
; /* estimator list */
988 struct timer_list est_timer
; /* Estimation timer */
990 spinlock_t sync_lock
;
991 struct ipvs_master_sync_state
*ms
;
992 spinlock_t sync_buff_lock
;
993 struct task_struct
**backup_threads
;
995 volatile int sync_state
;
996 struct mutex sync_mutex
;
997 struct ipvs_sync_daemon_cfg mcfg
; /* Master Configuration */
998 struct ipvs_sync_daemon_cfg bcfg
; /* Backup Configuration */
999 /* net name space ptr */
1000 struct net
*net
; /* Needed by timer routines */
1001 /* Number of heterogeneous destinations, needed becaus heterogeneous
1002 * are not supported when synchronization is enabled.
1004 unsigned int mixed_address_family_dests
;
1007 #define DEFAULT_SYNC_THRESHOLD 3
1008 #define DEFAULT_SYNC_PERIOD 50
1009 #define DEFAULT_SYNC_VER 1
1010 #define DEFAULT_SLOPPY_TCP 0
1011 #define DEFAULT_SLOPPY_SCTP 0
1012 #define DEFAULT_SYNC_REFRESH_PERIOD (0U * HZ)
1013 #define DEFAULT_SYNC_RETRIES 0
1014 #define IPVS_SYNC_WAKEUP_RATE 8
1015 #define IPVS_SYNC_QLEN_MAX (IPVS_SYNC_WAKEUP_RATE * 4)
1016 #define IPVS_SYNC_SEND_DELAY (HZ / 50)
1017 #define IPVS_SYNC_CHECK_PERIOD HZ
1018 #define IPVS_SYNC_FLUSH_TIME (HZ * 2)
1019 #define IPVS_SYNC_PORTS_MAX (1 << 6)
1021 #ifdef CONFIG_SYSCTL
1023 static inline int sysctl_sync_threshold(struct netns_ipvs
*ipvs
)
1025 return ipvs
->sysctl_sync_threshold
[0];
1028 static inline int sysctl_sync_period(struct netns_ipvs
*ipvs
)
1030 return ACCESS_ONCE(ipvs
->sysctl_sync_threshold
[1]);
1033 static inline unsigned int sysctl_sync_refresh_period(struct netns_ipvs
*ipvs
)
1035 return ACCESS_ONCE(ipvs
->sysctl_sync_refresh_period
);
1038 static inline int sysctl_sync_retries(struct netns_ipvs
*ipvs
)
1040 return ipvs
->sysctl_sync_retries
;
1043 static inline int sysctl_sync_ver(struct netns_ipvs
*ipvs
)
1045 return ipvs
->sysctl_sync_ver
;
1048 static inline int sysctl_sloppy_tcp(struct netns_ipvs
*ipvs
)
1050 return ipvs
->sysctl_sloppy_tcp
;
1053 static inline int sysctl_sloppy_sctp(struct netns_ipvs
*ipvs
)
1055 return ipvs
->sysctl_sloppy_sctp
;
1058 static inline int sysctl_sync_ports(struct netns_ipvs
*ipvs
)
1060 return ACCESS_ONCE(ipvs
->sysctl_sync_ports
);
1063 static inline int sysctl_sync_persist_mode(struct netns_ipvs
*ipvs
)
1065 return ipvs
->sysctl_sync_persist_mode
;
1068 static inline unsigned long sysctl_sync_qlen_max(struct netns_ipvs
*ipvs
)
1070 return ipvs
->sysctl_sync_qlen_max
;
1073 static inline int sysctl_sync_sock_size(struct netns_ipvs
*ipvs
)
1075 return ipvs
->sysctl_sync_sock_size
;
1078 static inline int sysctl_pmtu_disc(struct netns_ipvs
*ipvs
)
1080 return ipvs
->sysctl_pmtu_disc
;
1083 static inline int sysctl_backup_only(struct netns_ipvs
*ipvs
)
1085 return ipvs
->sync_state
& IP_VS_STATE_BACKUP
&&
1086 ipvs
->sysctl_backup_only
;
1089 static inline int sysctl_conn_reuse_mode(struct netns_ipvs
*ipvs
)
1091 return ipvs
->sysctl_conn_reuse_mode
;
1094 static inline int sysctl_schedule_icmp(struct netns_ipvs
*ipvs
)
1096 return ipvs
->sysctl_schedule_icmp
;
1099 static inline int sysctl_ignore_tunneled(struct netns_ipvs
*ipvs
)
1101 return ipvs
->sysctl_ignore_tunneled
;
1104 static inline int sysctl_cache_bypass(struct netns_ipvs
*ipvs
)
1106 return ipvs
->sysctl_cache_bypass
;
1111 static inline int sysctl_sync_threshold(struct netns_ipvs
*ipvs
)
1113 return DEFAULT_SYNC_THRESHOLD
;
1116 static inline int sysctl_sync_period(struct netns_ipvs
*ipvs
)
1118 return DEFAULT_SYNC_PERIOD
;
1121 static inline unsigned int sysctl_sync_refresh_period(struct netns_ipvs
*ipvs
)
1123 return DEFAULT_SYNC_REFRESH_PERIOD
;
1126 static inline int sysctl_sync_retries(struct netns_ipvs
*ipvs
)
1128 return DEFAULT_SYNC_RETRIES
& 3;
1131 static inline int sysctl_sync_ver(struct netns_ipvs
*ipvs
)
1133 return DEFAULT_SYNC_VER
;
1136 static inline int sysctl_sloppy_tcp(struct netns_ipvs
*ipvs
)
1138 return DEFAULT_SLOPPY_TCP
;
1141 static inline int sysctl_sloppy_sctp(struct netns_ipvs
*ipvs
)
1143 return DEFAULT_SLOPPY_SCTP
;
1146 static inline int sysctl_sync_ports(struct netns_ipvs
*ipvs
)
1151 static inline int sysctl_sync_persist_mode(struct netns_ipvs
*ipvs
)
1156 static inline unsigned long sysctl_sync_qlen_max(struct netns_ipvs
*ipvs
)
1158 return IPVS_SYNC_QLEN_MAX
;
1161 static inline int sysctl_sync_sock_size(struct netns_ipvs
*ipvs
)
1166 static inline int sysctl_pmtu_disc(struct netns_ipvs
*ipvs
)
1171 static inline int sysctl_backup_only(struct netns_ipvs
*ipvs
)
1176 static inline int sysctl_conn_reuse_mode(struct netns_ipvs
*ipvs
)
1181 static inline int sysctl_schedule_icmp(struct netns_ipvs
*ipvs
)
1186 static inline int sysctl_ignore_tunneled(struct netns_ipvs
*ipvs
)
1191 static inline int sysctl_cache_bypass(struct netns_ipvs
*ipvs
)
1198 /* IPVS core functions
1199 * (from ip_vs_core.c)
1201 const char *ip_vs_proto_name(unsigned int proto
);
1202 void ip_vs_init_hash_table(struct list_head
*table
, int rows
);
1203 #define IP_VS_INIT_HASH_TABLE(t) ip_vs_init_hash_table((t), ARRAY_SIZE((t)))
1205 #define IP_VS_APP_TYPE_FTP 1
1207 /* ip_vs_conn handling functions
1208 * (from ip_vs_conn.c)
1211 IP_VS_DIR_INPUT
= 0,
1213 IP_VS_DIR_INPUT_ONLY
,
1217 static inline void ip_vs_conn_fill_param(struct netns_ipvs
*ipvs
, int af
, int protocol
,
1218 const union nf_inet_addr
*caddr
,
1220 const union nf_inet_addr
*vaddr
,
1222 struct ip_vs_conn_param
*p
)
1226 p
->protocol
= protocol
;
1235 struct ip_vs_conn
*ip_vs_conn_in_get(const struct ip_vs_conn_param
*p
);
1236 struct ip_vs_conn
*ip_vs_ct_in_get(const struct ip_vs_conn_param
*p
);
1238 struct ip_vs_conn
* ip_vs_conn_in_get_proto(struct netns_ipvs
*ipvs
, int af
,
1239 const struct sk_buff
*skb
,
1240 const struct ip_vs_iphdr
*iph
);
1242 struct ip_vs_conn
*ip_vs_conn_out_get(const struct ip_vs_conn_param
*p
);
1244 struct ip_vs_conn
* ip_vs_conn_out_get_proto(struct netns_ipvs
*ipvs
, int af
,
1245 const struct sk_buff
*skb
,
1246 const struct ip_vs_iphdr
*iph
);
1248 /* Get reference to gain full access to conn.
1249 * By default, RCU read-side critical sections have access only to
1250 * conn fields and its PE data, see ip_vs_conn_rcu_free() for reference.
1252 static inline bool __ip_vs_conn_get(struct ip_vs_conn
*cp
)
1254 return atomic_inc_not_zero(&cp
->refcnt
);
1257 /* put back the conn without restarting its timer */
1258 static inline void __ip_vs_conn_put(struct ip_vs_conn
*cp
)
1260 smp_mb__before_atomic();
1261 atomic_dec(&cp
->refcnt
);
1263 void ip_vs_conn_put(struct ip_vs_conn
*cp
);
1264 void ip_vs_conn_fill_cport(struct ip_vs_conn
*cp
, __be16 cport
);
1266 struct ip_vs_conn
*ip_vs_conn_new(const struct ip_vs_conn_param
*p
, int dest_af
,
1267 const union nf_inet_addr
*daddr
,
1268 __be16 dport
, unsigned int flags
,
1269 struct ip_vs_dest
*dest
, __u32 fwmark
);
1270 void ip_vs_conn_expire_now(struct ip_vs_conn
*cp
);
1272 const char *ip_vs_state_name(__u16 proto
, int state
);
1274 void ip_vs_tcp_conn_listen(struct net
*net
, struct ip_vs_conn
*cp
);
1275 int ip_vs_check_template(struct ip_vs_conn
*ct
);
1276 void ip_vs_random_dropentry(struct netns_ipvs
*ipvs
);
1277 int ip_vs_conn_init(void);
1278 void ip_vs_conn_cleanup(void);
1280 static inline void ip_vs_control_del(struct ip_vs_conn
*cp
)
1282 struct ip_vs_conn
*ctl_cp
= cp
->control
;
1284 IP_VS_ERR_BUF("request control DEL for uncontrolled: "
1286 IP_VS_DBG_ADDR(cp
->af
, &cp
->caddr
),
1288 IP_VS_DBG_ADDR(cp
->af
, &cp
->vaddr
),
1294 IP_VS_DBG_BUF(7, "DELeting control for: "
1295 "cp.dst=%s:%d ctl_cp.dst=%s:%d\n",
1296 IP_VS_DBG_ADDR(cp
->af
, &cp
->caddr
),
1298 IP_VS_DBG_ADDR(cp
->af
, &ctl_cp
->caddr
),
1299 ntohs(ctl_cp
->cport
));
1302 if (atomic_read(&ctl_cp
->n_control
) == 0) {
1303 IP_VS_ERR_BUF("BUG control DEL with n=0 : "
1305 IP_VS_DBG_ADDR(cp
->af
, &cp
->caddr
),
1307 IP_VS_DBG_ADDR(cp
->af
, &cp
->vaddr
),
1312 atomic_dec(&ctl_cp
->n_control
);
1316 ip_vs_control_add(struct ip_vs_conn
*cp
, struct ip_vs_conn
*ctl_cp
)
1319 IP_VS_ERR_BUF("request control ADD for already controlled: "
1321 IP_VS_DBG_ADDR(cp
->af
, &cp
->caddr
),
1323 IP_VS_DBG_ADDR(cp
->af
, &cp
->vaddr
),
1326 ip_vs_control_del(cp
);
1329 IP_VS_DBG_BUF(7, "ADDing control for: "
1330 "cp.dst=%s:%d ctl_cp.dst=%s:%d\n",
1331 IP_VS_DBG_ADDR(cp
->af
, &cp
->caddr
),
1333 IP_VS_DBG_ADDR(cp
->af
, &ctl_cp
->caddr
),
1334 ntohs(ctl_cp
->cport
));
1336 cp
->control
= ctl_cp
;
1337 atomic_inc(&ctl_cp
->n_control
);
1340 /* IPVS netns init & cleanup functions */
1341 int ip_vs_estimator_net_init(struct netns_ipvs
*ipvs
);
1342 int ip_vs_control_net_init(struct netns_ipvs
*ipvs
);
1343 int ip_vs_protocol_net_init(struct net
*net
);
1344 int ip_vs_app_net_init(struct netns_ipvs
*ipvs
);
1345 int ip_vs_conn_net_init(struct netns_ipvs
*ipvs
);
1346 int ip_vs_sync_net_init(struct netns_ipvs
*ipvs
);
1347 void ip_vs_conn_net_cleanup(struct netns_ipvs
*ipvs
);
1348 void ip_vs_app_net_cleanup(struct netns_ipvs
*ipvs
);
1349 void ip_vs_protocol_net_cleanup(struct net
*net
);
1350 void ip_vs_control_net_cleanup(struct netns_ipvs
*ipvs
);
1351 void ip_vs_estimator_net_cleanup(struct netns_ipvs
*ipvs
);
1352 void ip_vs_sync_net_cleanup(struct netns_ipvs
*ipvs
);
1353 void ip_vs_service_net_cleanup(struct netns_ipvs
*ipvs
);
1355 /* IPVS application functions
1356 * (from ip_vs_app.c)
1358 #define IP_VS_APP_MAX_PORTS 8
1359 struct ip_vs_app
*register_ip_vs_app(struct netns_ipvs
*ipvs
, struct ip_vs_app
*app
);
1360 void unregister_ip_vs_app(struct netns_ipvs
*ipvs
, struct ip_vs_app
*app
);
1361 int ip_vs_bind_app(struct ip_vs_conn
*cp
, struct ip_vs_protocol
*pp
);
1362 void ip_vs_unbind_app(struct ip_vs_conn
*cp
);
1363 int register_ip_vs_app_inc(struct netns_ipvs
*ipvs
, struct ip_vs_app
*app
, __u16 proto
,
1365 int ip_vs_app_inc_get(struct ip_vs_app
*inc
);
1366 void ip_vs_app_inc_put(struct ip_vs_app
*inc
);
1368 int ip_vs_app_pkt_out(struct ip_vs_conn
*, struct sk_buff
*skb
);
1369 int ip_vs_app_pkt_in(struct ip_vs_conn
*, struct sk_buff
*skb
);
1371 int register_ip_vs_pe(struct ip_vs_pe
*pe
);
1372 int unregister_ip_vs_pe(struct ip_vs_pe
*pe
);
1373 struct ip_vs_pe
*ip_vs_pe_getbyname(const char *name
);
1374 struct ip_vs_pe
*__ip_vs_pe_getbyname(const char *pe_name
);
1376 /* Use a #define to avoid all of module.h just for these trivial ops */
1377 #define ip_vs_pe_get(pe) \
1378 if (pe && pe->module) \
1379 __module_get(pe->module);
1381 #define ip_vs_pe_put(pe) \
1382 if (pe && pe->module) \
1383 module_put(pe->module);
1385 /* IPVS protocol functions (from ip_vs_proto.c) */
1386 int ip_vs_protocol_init(void);
1387 void ip_vs_protocol_cleanup(void);
1388 void ip_vs_protocol_timeout_change(struct netns_ipvs
*ipvs
, int flags
);
1389 int *ip_vs_create_timeout_table(int *table
, int size
);
1390 int ip_vs_set_state_timeout(int *table
, int num
, const char *const *names
,
1391 const char *name
, int to
);
1392 void ip_vs_tcpudp_debug_packet(int af
, struct ip_vs_protocol
*pp
,
1393 const struct sk_buff
*skb
, int offset
,
1396 extern struct ip_vs_protocol ip_vs_protocol_tcp
;
1397 extern struct ip_vs_protocol ip_vs_protocol_udp
;
1398 extern struct ip_vs_protocol ip_vs_protocol_icmp
;
1399 extern struct ip_vs_protocol ip_vs_protocol_esp
;
1400 extern struct ip_vs_protocol ip_vs_protocol_ah
;
1401 extern struct ip_vs_protocol ip_vs_protocol_sctp
;
1403 /* Registering/unregistering scheduler functions
1404 * (from ip_vs_sched.c)
1406 int register_ip_vs_scheduler(struct ip_vs_scheduler
*scheduler
);
1407 int unregister_ip_vs_scheduler(struct ip_vs_scheduler
*scheduler
);
1408 int ip_vs_bind_scheduler(struct ip_vs_service
*svc
,
1409 struct ip_vs_scheduler
*scheduler
);
1410 void ip_vs_unbind_scheduler(struct ip_vs_service
*svc
,
1411 struct ip_vs_scheduler
*sched
);
1412 struct ip_vs_scheduler
*ip_vs_scheduler_get(const char *sched_name
);
1413 void ip_vs_scheduler_put(struct ip_vs_scheduler
*scheduler
);
1415 ip_vs_schedule(struct ip_vs_service
*svc
, struct sk_buff
*skb
,
1416 struct ip_vs_proto_data
*pd
, int *ignored
,
1417 struct ip_vs_iphdr
*iph
);
1418 int ip_vs_leave(struct ip_vs_service
*svc
, struct sk_buff
*skb
,
1419 struct ip_vs_proto_data
*pd
, struct ip_vs_iphdr
*iph
);
1421 void ip_vs_scheduler_err(struct ip_vs_service
*svc
, const char *msg
);
1423 /* IPVS control data and functions (from ip_vs_ctl.c) */
1424 extern struct ip_vs_stats ip_vs_stats
;
1425 extern int sysctl_ip_vs_sync_ver
;
1427 struct ip_vs_service
*
1428 ip_vs_service_find(struct netns_ipvs
*ipvs
, int af
, __u32 fwmark
, __u16 protocol
,
1429 const union nf_inet_addr
*vaddr
, __be16 vport
);
1431 bool ip_vs_has_real_service(struct netns_ipvs
*ipvs
, int af
, __u16 protocol
,
1432 const union nf_inet_addr
*daddr
, __be16 dport
);
1434 int ip_vs_use_count_inc(void);
1435 void ip_vs_use_count_dec(void);
1436 int ip_vs_register_nl_ioctl(void);
1437 void ip_vs_unregister_nl_ioctl(void);
1438 int ip_vs_control_init(void);
1439 void ip_vs_control_cleanup(void);
1441 ip_vs_find_dest(struct netns_ipvs
*ipvs
, int svc_af
, int dest_af
,
1442 const union nf_inet_addr
*daddr
, __be16 dport
,
1443 const union nf_inet_addr
*vaddr
, __be16 vport
,
1444 __u16 protocol
, __u32 fwmark
, __u32 flags
);
1445 void ip_vs_try_bind_dest(struct ip_vs_conn
*cp
);
1447 static inline void ip_vs_dest_hold(struct ip_vs_dest
*dest
)
1449 atomic_inc(&dest
->refcnt
);
1452 static inline void ip_vs_dest_put(struct ip_vs_dest
*dest
)
1454 smp_mb__before_atomic();
1455 atomic_dec(&dest
->refcnt
);
1458 static inline void ip_vs_dest_put_and_free(struct ip_vs_dest
*dest
)
1460 if (atomic_dec_return(&dest
->refcnt
) < 0)
1464 /* IPVS sync daemon data and function prototypes
1465 * (from ip_vs_sync.c)
1467 int start_sync_thread(struct netns_ipvs
*ipvs
, struct ipvs_sync_daemon_cfg
*cfg
,
1469 int stop_sync_thread(struct netns_ipvs
*ipvs
, int state
);
1470 void ip_vs_sync_conn(struct netns_ipvs
*ipvs
, struct ip_vs_conn
*cp
, int pkts
);
1472 /* IPVS rate estimator prototypes (from ip_vs_est.c) */
1473 void ip_vs_start_estimator(struct netns_ipvs
*ipvs
, struct ip_vs_stats
*stats
);
1474 void ip_vs_stop_estimator(struct netns_ipvs
*ipvs
, struct ip_vs_stats
*stats
);
1475 void ip_vs_zero_estimator(struct ip_vs_stats
*stats
);
1476 void ip_vs_read_estimator(struct ip_vs_kstats
*dst
, struct ip_vs_stats
*stats
);
1478 /* Various IPVS packet transmitters (from ip_vs_xmit.c) */
1479 int ip_vs_null_xmit(struct sk_buff
*skb
, struct ip_vs_conn
*cp
,
1480 struct ip_vs_protocol
*pp
, struct ip_vs_iphdr
*iph
);
1481 int ip_vs_bypass_xmit(struct sk_buff
*skb
, struct ip_vs_conn
*cp
,
1482 struct ip_vs_protocol
*pp
, struct ip_vs_iphdr
*iph
);
1483 int ip_vs_nat_xmit(struct sk_buff
*skb
, struct ip_vs_conn
*cp
,
1484 struct ip_vs_protocol
*pp
, struct ip_vs_iphdr
*iph
);
1485 int ip_vs_tunnel_xmit(struct sk_buff
*skb
, struct ip_vs_conn
*cp
,
1486 struct ip_vs_protocol
*pp
, struct ip_vs_iphdr
*iph
);
1487 int ip_vs_dr_xmit(struct sk_buff
*skb
, struct ip_vs_conn
*cp
,
1488 struct ip_vs_protocol
*pp
, struct ip_vs_iphdr
*iph
);
1489 int ip_vs_icmp_xmit(struct sk_buff
*skb
, struct ip_vs_conn
*cp
,
1490 struct ip_vs_protocol
*pp
, int offset
,
1491 unsigned int hooknum
, struct ip_vs_iphdr
*iph
);
1492 void ip_vs_dest_dst_rcu_free(struct rcu_head
*head
);
1494 #ifdef CONFIG_IP_VS_IPV6
1495 int ip_vs_bypass_xmit_v6(struct sk_buff
*skb
, struct ip_vs_conn
*cp
,
1496 struct ip_vs_protocol
*pp
, struct ip_vs_iphdr
*iph
);
1497 int ip_vs_nat_xmit_v6(struct sk_buff
*skb
, struct ip_vs_conn
*cp
,
1498 struct ip_vs_protocol
*pp
, struct ip_vs_iphdr
*iph
);
1499 int ip_vs_tunnel_xmit_v6(struct sk_buff
*skb
, struct ip_vs_conn
*cp
,
1500 struct ip_vs_protocol
*pp
, struct ip_vs_iphdr
*iph
);
1501 int ip_vs_dr_xmit_v6(struct sk_buff
*skb
, struct ip_vs_conn
*cp
,
1502 struct ip_vs_protocol
*pp
, struct ip_vs_iphdr
*iph
);
1503 int ip_vs_icmp_xmit_v6(struct sk_buff
*skb
, struct ip_vs_conn
*cp
,
1504 struct ip_vs_protocol
*pp
, int offset
,
1505 unsigned int hooknum
, struct ip_vs_iphdr
*iph
);
1508 #ifdef CONFIG_SYSCTL
1509 /* This is a simple mechanism to ignore packets when
1510 * we are loaded. Just set ip_vs_drop_rate to 'n' and
1511 * we start to drop 1/rate of the packets
1513 static inline int ip_vs_todrop(struct netns_ipvs
*ipvs
)
1515 if (!ipvs
->drop_rate
)
1517 if (--ipvs
->drop_counter
> 0)
1519 ipvs
->drop_counter
= ipvs
->drop_rate
;
1523 static inline int ip_vs_todrop(struct netns_ipvs
*ipvs
) { return 0; }
1526 /* ip_vs_fwd_tag returns the forwarding tag of the connection */
1527 #define IP_VS_FWD_METHOD(cp) (cp->flags & IP_VS_CONN_F_FWD_MASK)
1529 static inline char ip_vs_fwd_tag(struct ip_vs_conn
*cp
)
1533 switch (IP_VS_FWD_METHOD(cp
)) {
1534 case IP_VS_CONN_F_MASQ
:
1536 case IP_VS_CONN_F_LOCALNODE
:
1538 case IP_VS_CONN_F_TUNNEL
:
1540 case IP_VS_CONN_F_DROUTE
:
1542 case IP_VS_CONN_F_BYPASS
:
1550 void ip_vs_nat_icmp(struct sk_buff
*skb
, struct ip_vs_protocol
*pp
,
1551 struct ip_vs_conn
*cp
, int dir
);
1553 #ifdef CONFIG_IP_VS_IPV6
1554 void ip_vs_nat_icmp_v6(struct sk_buff
*skb
, struct ip_vs_protocol
*pp
,
1555 struct ip_vs_conn
*cp
, int dir
);
1558 __sum16
ip_vs_checksum_complete(struct sk_buff
*skb
, int offset
);
1560 static inline __wsum
ip_vs_check_diff4(__be32 old
, __be32
new, __wsum oldsum
)
1562 __be32 diff
[2] = { ~old
, new };
1564 return csum_partial(diff
, sizeof(diff
), oldsum
);
1567 #ifdef CONFIG_IP_VS_IPV6
1568 static inline __wsum
ip_vs_check_diff16(const __be32
*old
, const __be32
*new,
1571 __be32 diff
[8] = { ~old
[3], ~old
[2], ~old
[1], ~old
[0],
1572 new[3], new[2], new[1], new[0] };
1574 return csum_partial(diff
, sizeof(diff
), oldsum
);
1578 static inline __wsum
ip_vs_check_diff2(__be16 old
, __be16
new, __wsum oldsum
)
1580 __be16 diff
[2] = { ~old
, new };
1582 return csum_partial(diff
, sizeof(diff
), oldsum
);
1585 /* Forget current conntrack (unconfirmed) and attach notrack entry */
1586 static inline void ip_vs_notrack(struct sk_buff
*skb
)
1588 #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
1589 enum ip_conntrack_info ctinfo
;
1590 struct nf_conn
*ct
= nf_ct_get(skb
, &ctinfo
);
1592 if (!ct
|| !nf_ct_is_untracked(ct
)) {
1593 nf_conntrack_put(skb
->nfct
);
1594 skb
->nfct
= &nf_ct_untracked_get()->ct_general
;
1595 skb
->nfctinfo
= IP_CT_NEW
;
1596 nf_conntrack_get(skb
->nfct
);
1601 #ifdef CONFIG_IP_VS_NFCT
1602 /* Netfilter connection tracking
1603 * (from ip_vs_nfct.c)
1605 static inline int ip_vs_conntrack_enabled(struct netns_ipvs
*ipvs
)
1607 #ifdef CONFIG_SYSCTL
1608 return ipvs
->sysctl_conntrack
;
1614 void ip_vs_update_conntrack(struct sk_buff
*skb
, struct ip_vs_conn
*cp
,
1616 int ip_vs_confirm_conntrack(struct sk_buff
*skb
);
1617 void ip_vs_nfct_expect_related(struct sk_buff
*skb
, struct nf_conn
*ct
,
1618 struct ip_vs_conn
*cp
, u_int8_t proto
,
1619 const __be16 port
, int from_rs
);
1620 void ip_vs_conn_drop_conntrack(struct ip_vs_conn
*cp
);
1624 static inline int ip_vs_conntrack_enabled(struct netns_ipvs
*ipvs
)
1629 static inline void ip_vs_update_conntrack(struct sk_buff
*skb
,
1630 struct ip_vs_conn
*cp
, int outin
)
1634 static inline int ip_vs_confirm_conntrack(struct sk_buff
*skb
)
1639 static inline void ip_vs_conn_drop_conntrack(struct ip_vs_conn
*cp
)
1642 #endif /* CONFIG_IP_VS_NFCT */
1645 ip_vs_dest_conn_overhead(struct ip_vs_dest
*dest
)
1647 /* We think the overhead of processing active connections is 256
1648 * times higher than that of inactive connections in average. (This
1649 * 256 times might not be accurate, we will change it later) We
1650 * use the following formula to estimate the overhead now:
1651 * dest->activeconns*256 + dest->inactconns
1653 return (atomic_read(&dest
->activeconns
) << 8) +
1654 atomic_read(&dest
->inactconns
);
1657 #endif /* _NET_IP_VS_H */