2 * ip_vs_proto_tcp.c: TCP load balancing support for IPVS
4 * Authors: Wensong Zhang <wensong@linuxvirtualserver.org>
5 * Julian Anastasov <ja@ssi.bg>
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
12 * Changes: Hans Schillstrom <hans.schillstrom@ericsson.com>
14 * Network name space (netns) aware.
15 * Global data moved to netns i.e struct netns_ipvs
16 * tcp_timeouts table has copy per netns in a hash table per
17 * protocol ip_vs_proto_data and is handled by netns
20 #define KMSG_COMPONENT "IPVS"
21 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
23 #include <linux/kernel.h>
25 #include <linux/tcp.h> /* for tcphdr */
27 #include <net/tcp.h> /* for csum_tcpudp_magic */
28 #include <net/ip6_checksum.h>
29 #include <linux/netfilter.h>
30 #include <linux/netfilter_ipv4.h>
32 #include <net/ip_vs.h>
35 tcp_conn_schedule(int af
, struct sk_buff
*skb
, struct ip_vs_proto_data
*pd
,
36 int *verdict
, struct ip_vs_conn
**cpp
)
39 struct ip_vs_service
*svc
;
40 struct tcphdr _tcph
, *th
;
41 struct ip_vs_iphdr iph
;
43 ip_vs_fill_iphdr(af
, skb_network_header(skb
), &iph
);
45 th
= skb_header_pointer(skb
, iph
.len
, sizeof(_tcph
), &_tcph
);
51 /* No !th->ack check to allow scheduling on SYN+ACK for Active FTP */
53 (svc
= ip_vs_service_get(net
, af
, skb
->mark
, iph
.protocol
,
54 &iph
.daddr
, th
->dest
))) {
57 if (ip_vs_todrop(net_ipvs(net
))) {
59 * It seems that we are very loaded.
60 * We have to drop this packet :(
62 ip_vs_service_put(svc
);
68 * Let the virtual server select a real server for the
69 * incoming connection, and create a connection entry.
71 *cpp
= ip_vs_schedule(svc
, skb
, pd
, &ignored
);
72 if (!*cpp
&& ignored
<= 0) {
74 *verdict
= ip_vs_leave(svc
, skb
, pd
);
76 ip_vs_service_put(svc
);
81 ip_vs_service_put(svc
);
89 tcp_fast_csum_update(int af
, struct tcphdr
*tcph
,
90 const union nf_inet_addr
*oldip
,
91 const union nf_inet_addr
*newip
,
92 __be16 oldport
, __be16 newport
)
94 #ifdef CONFIG_IP_VS_IPV6
97 csum_fold(ip_vs_check_diff16(oldip
->ip6
, newip
->ip6
,
98 ip_vs_check_diff2(oldport
, newport
,
99 ~csum_unfold(tcph
->check
))));
103 csum_fold(ip_vs_check_diff4(oldip
->ip
, newip
->ip
,
104 ip_vs_check_diff2(oldport
, newport
,
105 ~csum_unfold(tcph
->check
))));
110 tcp_partial_csum_update(int af
, struct tcphdr
*tcph
,
111 const union nf_inet_addr
*oldip
,
112 const union nf_inet_addr
*newip
,
113 __be16 oldlen
, __be16 newlen
)
115 #ifdef CONFIG_IP_VS_IPV6
118 ~csum_fold(ip_vs_check_diff16(oldip
->ip6
, newip
->ip6
,
119 ip_vs_check_diff2(oldlen
, newlen
,
120 csum_unfold(tcph
->check
))));
124 ~csum_fold(ip_vs_check_diff4(oldip
->ip
, newip
->ip
,
125 ip_vs_check_diff2(oldlen
, newlen
,
126 csum_unfold(tcph
->check
))));
131 tcp_snat_handler(struct sk_buff
*skb
,
132 struct ip_vs_protocol
*pp
, struct ip_vs_conn
*cp
)
135 unsigned int tcphoff
;
137 int payload_csum
= 0;
139 #ifdef CONFIG_IP_VS_IPV6
140 if (cp
->af
== AF_INET6
)
141 tcphoff
= sizeof(struct ipv6hdr
);
144 tcphoff
= ip_hdrlen(skb
);
145 oldlen
= skb
->len
- tcphoff
;
147 /* csum_check requires unshared skb */
148 if (!skb_make_writable(skb
, tcphoff
+sizeof(*tcph
)))
151 if (unlikely(cp
->app
!= NULL
)) {
154 /* Some checks before mangling */
155 if (pp
->csum_check
&& !pp
->csum_check(cp
->af
, skb
, pp
))
158 /* Call application helper if needed */
159 if (!(ret
= ip_vs_app_pkt_out(cp
, skb
)))
161 /* ret=2: csum update is needed after payload mangling */
163 oldlen
= skb
->len
- tcphoff
;
168 tcph
= (void *)skb_network_header(skb
) + tcphoff
;
169 tcph
->source
= cp
->vport
;
171 /* Adjust TCP checksums */
172 if (skb
->ip_summed
== CHECKSUM_PARTIAL
) {
173 tcp_partial_csum_update(cp
->af
, tcph
, &cp
->daddr
, &cp
->vaddr
,
175 htons(skb
->len
- tcphoff
));
176 } else if (!payload_csum
) {
177 /* Only port and addr are changed, do fast csum update */
178 tcp_fast_csum_update(cp
->af
, tcph
, &cp
->daddr
, &cp
->vaddr
,
179 cp
->dport
, cp
->vport
);
180 if (skb
->ip_summed
== CHECKSUM_COMPLETE
)
181 skb
->ip_summed
= (cp
->app
&& pp
->csum_check
) ?
182 CHECKSUM_UNNECESSARY
: CHECKSUM_NONE
;
184 /* full checksum calculation */
186 skb
->csum
= skb_checksum(skb
, tcphoff
, skb
->len
- tcphoff
, 0);
187 #ifdef CONFIG_IP_VS_IPV6
188 if (cp
->af
== AF_INET6
)
189 tcph
->check
= csum_ipv6_magic(&cp
->vaddr
.in6
,
192 cp
->protocol
, skb
->csum
);
195 tcph
->check
= csum_tcpudp_magic(cp
->vaddr
.ip
,
200 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
202 IP_VS_DBG(11, "O-pkt: %s O-csum=%d (+%zd)\n",
203 pp
->name
, tcph
->check
,
204 (char*)&(tcph
->check
) - (char*)tcph
);
211 tcp_dnat_handler(struct sk_buff
*skb
,
212 struct ip_vs_protocol
*pp
, struct ip_vs_conn
*cp
)
215 unsigned int tcphoff
;
217 int payload_csum
= 0;
219 #ifdef CONFIG_IP_VS_IPV6
220 if (cp
->af
== AF_INET6
)
221 tcphoff
= sizeof(struct ipv6hdr
);
224 tcphoff
= ip_hdrlen(skb
);
225 oldlen
= skb
->len
- tcphoff
;
227 /* csum_check requires unshared skb */
228 if (!skb_make_writable(skb
, tcphoff
+sizeof(*tcph
)))
231 if (unlikely(cp
->app
!= NULL
)) {
234 /* Some checks before mangling */
235 if (pp
->csum_check
&& !pp
->csum_check(cp
->af
, skb
, pp
))
239 * Attempt ip_vs_app call.
240 * It will fix ip_vs_conn and iph ack_seq stuff
242 if (!(ret
= ip_vs_app_pkt_in(cp
, skb
)))
244 /* ret=2: csum update is needed after payload mangling */
246 oldlen
= skb
->len
- tcphoff
;
251 tcph
= (void *)skb_network_header(skb
) + tcphoff
;
252 tcph
->dest
= cp
->dport
;
255 * Adjust TCP checksums
257 if (skb
->ip_summed
== CHECKSUM_PARTIAL
) {
258 tcp_partial_csum_update(cp
->af
, tcph
, &cp
->vaddr
, &cp
->daddr
,
260 htons(skb
->len
- tcphoff
));
261 } else if (!payload_csum
) {
262 /* Only port and addr are changed, do fast csum update */
263 tcp_fast_csum_update(cp
->af
, tcph
, &cp
->vaddr
, &cp
->daddr
,
264 cp
->vport
, cp
->dport
);
265 if (skb
->ip_summed
== CHECKSUM_COMPLETE
)
266 skb
->ip_summed
= (cp
->app
&& pp
->csum_check
) ?
267 CHECKSUM_UNNECESSARY
: CHECKSUM_NONE
;
269 /* full checksum calculation */
271 skb
->csum
= skb_checksum(skb
, tcphoff
, skb
->len
- tcphoff
, 0);
272 #ifdef CONFIG_IP_VS_IPV6
273 if (cp
->af
== AF_INET6
)
274 tcph
->check
= csum_ipv6_magic(&cp
->caddr
.in6
,
277 cp
->protocol
, skb
->csum
);
280 tcph
->check
= csum_tcpudp_magic(cp
->caddr
.ip
,
285 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
292 tcp_csum_check(int af
, struct sk_buff
*skb
, struct ip_vs_protocol
*pp
)
294 unsigned int tcphoff
;
296 #ifdef CONFIG_IP_VS_IPV6
298 tcphoff
= sizeof(struct ipv6hdr
);
301 tcphoff
= ip_hdrlen(skb
);
303 switch (skb
->ip_summed
) {
305 skb
->csum
= skb_checksum(skb
, tcphoff
, skb
->len
- tcphoff
, 0);
306 case CHECKSUM_COMPLETE
:
307 #ifdef CONFIG_IP_VS_IPV6
308 if (af
== AF_INET6
) {
309 if (csum_ipv6_magic(&ipv6_hdr(skb
)->saddr
,
310 &ipv6_hdr(skb
)->daddr
,
312 ipv6_hdr(skb
)->nexthdr
,
314 IP_VS_DBG_RL_PKT(0, af
, pp
, skb
, 0,
315 "Failed checksum for");
320 if (csum_tcpudp_magic(ip_hdr(skb
)->saddr
,
323 ip_hdr(skb
)->protocol
,
325 IP_VS_DBG_RL_PKT(0, af
, pp
, skb
, 0,
326 "Failed checksum for");
331 /* No need to checksum. */
339 #define TCP_DIR_INPUT 0
340 #define TCP_DIR_OUTPUT 4
341 #define TCP_DIR_INPUT_ONLY 8
343 static const int tcp_state_off
[IP_VS_DIR_LAST
] = {
344 [IP_VS_DIR_INPUT
] = TCP_DIR_INPUT
,
345 [IP_VS_DIR_OUTPUT
] = TCP_DIR_OUTPUT
,
346 [IP_VS_DIR_INPUT_ONLY
] = TCP_DIR_INPUT_ONLY
,
350 * Timeout table[state]
352 static const int tcp_timeouts
[IP_VS_TCP_S_LAST
+1] = {
353 [IP_VS_TCP_S_NONE
] = 2*HZ
,
354 [IP_VS_TCP_S_ESTABLISHED
] = 15*60*HZ
,
355 [IP_VS_TCP_S_SYN_SENT
] = 2*60*HZ
,
356 [IP_VS_TCP_S_SYN_RECV
] = 1*60*HZ
,
357 [IP_VS_TCP_S_FIN_WAIT
] = 2*60*HZ
,
358 [IP_VS_TCP_S_TIME_WAIT
] = 2*60*HZ
,
359 [IP_VS_TCP_S_CLOSE
] = 10*HZ
,
360 [IP_VS_TCP_S_CLOSE_WAIT
] = 60*HZ
,
361 [IP_VS_TCP_S_LAST_ACK
] = 30*HZ
,
362 [IP_VS_TCP_S_LISTEN
] = 2*60*HZ
,
363 [IP_VS_TCP_S_SYNACK
] = 120*HZ
,
364 [IP_VS_TCP_S_LAST
] = 2*HZ
,
367 static const char *const tcp_state_name_table
[IP_VS_TCP_S_LAST
+1] = {
368 [IP_VS_TCP_S_NONE
] = "NONE",
369 [IP_VS_TCP_S_ESTABLISHED
] = "ESTABLISHED",
370 [IP_VS_TCP_S_SYN_SENT
] = "SYN_SENT",
371 [IP_VS_TCP_S_SYN_RECV
] = "SYN_RECV",
372 [IP_VS_TCP_S_FIN_WAIT
] = "FIN_WAIT",
373 [IP_VS_TCP_S_TIME_WAIT
] = "TIME_WAIT",
374 [IP_VS_TCP_S_CLOSE
] = "CLOSE",
375 [IP_VS_TCP_S_CLOSE_WAIT
] = "CLOSE_WAIT",
376 [IP_VS_TCP_S_LAST_ACK
] = "LAST_ACK",
377 [IP_VS_TCP_S_LISTEN
] = "LISTEN",
378 [IP_VS_TCP_S_SYNACK
] = "SYNACK",
379 [IP_VS_TCP_S_LAST
] = "BUG!",
382 #define sNO IP_VS_TCP_S_NONE
383 #define sES IP_VS_TCP_S_ESTABLISHED
384 #define sSS IP_VS_TCP_S_SYN_SENT
385 #define sSR IP_VS_TCP_S_SYN_RECV
386 #define sFW IP_VS_TCP_S_FIN_WAIT
387 #define sTW IP_VS_TCP_S_TIME_WAIT
388 #define sCL IP_VS_TCP_S_CLOSE
389 #define sCW IP_VS_TCP_S_CLOSE_WAIT
390 #define sLA IP_VS_TCP_S_LAST_ACK
391 #define sLI IP_VS_TCP_S_LISTEN
392 #define sSA IP_VS_TCP_S_SYNACK
394 struct tcp_states_t
{
395 int next_state
[IP_VS_TCP_S_LAST
];
398 static const char * tcp_state_name(int state
)
400 if (state
>= IP_VS_TCP_S_LAST
)
402 return tcp_state_name_table
[state
] ? tcp_state_name_table
[state
] : "?";
405 static struct tcp_states_t tcp_states
[] = {
407 /* sNO, sES, sSS, sSR, sFW, sTW, sCL, sCW, sLA, sLI, sSA */
408 /*syn*/ {{sSR
, sES
, sES
, sSR
, sSR
, sSR
, sSR
, sSR
, sSR
, sSR
, sSR
}},
409 /*fin*/ {{sCL
, sCW
, sSS
, sTW
, sTW
, sTW
, sCL
, sCW
, sLA
, sLI
, sTW
}},
410 /*ack*/ {{sCL
, sES
, sSS
, sES
, sFW
, sTW
, sCL
, sCW
, sCL
, sLI
, sES
}},
411 /*rst*/ {{sCL
, sCL
, sCL
, sSR
, sCL
, sCL
, sCL
, sCL
, sLA
, sLI
, sSR
}},
414 /* sNO, sES, sSS, sSR, sFW, sTW, sCL, sCW, sLA, sLI, sSA */
415 /*syn*/ {{sSS
, sES
, sSS
, sSR
, sSS
, sSS
, sSS
, sSS
, sSS
, sLI
, sSR
}},
416 /*fin*/ {{sTW
, sFW
, sSS
, sTW
, sFW
, sTW
, sCL
, sTW
, sLA
, sLI
, sTW
}},
417 /*ack*/ {{sES
, sES
, sSS
, sES
, sFW
, sTW
, sCL
, sCW
, sLA
, sES
, sES
}},
418 /*rst*/ {{sCL
, sCL
, sSS
, sCL
, sCL
, sTW
, sCL
, sCL
, sCL
, sCL
, sCL
}},
421 /* sNO, sES, sSS, sSR, sFW, sTW, sCL, sCW, sLA, sLI, sSA */
422 /*syn*/ {{sSR
, sES
, sES
, sSR
, sSR
, sSR
, sSR
, sSR
, sSR
, sSR
, sSR
}},
423 /*fin*/ {{sCL
, sFW
, sSS
, sTW
, sFW
, sTW
, sCL
, sCW
, sLA
, sLI
, sTW
}},
424 /*ack*/ {{sCL
, sES
, sSS
, sES
, sFW
, sTW
, sCL
, sCW
, sCL
, sLI
, sES
}},
425 /*rst*/ {{sCL
, sCL
, sCL
, sSR
, sCL
, sCL
, sCL
, sCL
, sLA
, sLI
, sCL
}},
428 static struct tcp_states_t tcp_states_dos
[] = {
430 /* sNO, sES, sSS, sSR, sFW, sTW, sCL, sCW, sLA, sLI, sSA */
431 /*syn*/ {{sSR
, sES
, sES
, sSR
, sSR
, sSR
, sSR
, sSR
, sSR
, sSR
, sSA
}},
432 /*fin*/ {{sCL
, sCW
, sSS
, sTW
, sTW
, sTW
, sCL
, sCW
, sLA
, sLI
, sSA
}},
433 /*ack*/ {{sCL
, sES
, sSS
, sSR
, sFW
, sTW
, sCL
, sCW
, sCL
, sLI
, sSA
}},
434 /*rst*/ {{sCL
, sCL
, sCL
, sSR
, sCL
, sCL
, sCL
, sCL
, sLA
, sLI
, sCL
}},
437 /* sNO, sES, sSS, sSR, sFW, sTW, sCL, sCW, sLA, sLI, sSA */
438 /*syn*/ {{sSS
, sES
, sSS
, sSA
, sSS
, sSS
, sSS
, sSS
, sSS
, sLI
, sSA
}},
439 /*fin*/ {{sTW
, sFW
, sSS
, sTW
, sFW
, sTW
, sCL
, sTW
, sLA
, sLI
, sTW
}},
440 /*ack*/ {{sES
, sES
, sSS
, sES
, sFW
, sTW
, sCL
, sCW
, sLA
, sES
, sES
}},
441 /*rst*/ {{sCL
, sCL
, sSS
, sCL
, sCL
, sTW
, sCL
, sCL
, sCL
, sCL
, sCL
}},
444 /* sNO, sES, sSS, sSR, sFW, sTW, sCL, sCW, sLA, sLI, sSA */
445 /*syn*/ {{sSA
, sES
, sES
, sSR
, sSA
, sSA
, sSA
, sSA
, sSA
, sSA
, sSA
}},
446 /*fin*/ {{sCL
, sFW
, sSS
, sTW
, sFW
, sTW
, sCL
, sCW
, sLA
, sLI
, sTW
}},
447 /*ack*/ {{sCL
, sES
, sSS
, sES
, sFW
, sTW
, sCL
, sCW
, sCL
, sLI
, sES
}},
448 /*rst*/ {{sCL
, sCL
, sCL
, sSR
, sCL
, sCL
, sCL
, sCL
, sLA
, sLI
, sCL
}},
451 static void tcp_timeout_change(struct ip_vs_proto_data
*pd
, int flags
)
453 int on
= (flags
& 1); /* secure_tcp */
456 ** FIXME: change secure_tcp to independent sysctl var
457 ** or make it per-service or per-app because it is valid
458 ** for most if not for all of the applications. Something
459 ** like "capabilities" (flags) for each object.
461 pd
->tcp_state_table
= (on
? tcp_states_dos
: tcp_states
);
464 static inline int tcp_state_idx(struct tcphdr
*th
)
478 set_tcp_state(struct ip_vs_proto_data
*pd
, struct ip_vs_conn
*cp
,
479 int direction
, struct tcphdr
*th
)
482 int new_state
= IP_VS_TCP_S_CLOSE
;
483 int state_off
= tcp_state_off
[direction
];
486 * Update state offset to INPUT_ONLY if necessary
487 * or delete NO_OUTPUT flag if output packet detected
489 if (cp
->flags
& IP_VS_CONN_F_NOOUTPUT
) {
490 if (state_off
== TCP_DIR_OUTPUT
)
491 cp
->flags
&= ~IP_VS_CONN_F_NOOUTPUT
;
493 state_off
= TCP_DIR_INPUT_ONLY
;
496 if ((state_idx
= tcp_state_idx(th
)) < 0) {
497 IP_VS_DBG(8, "tcp_state_idx=%d!!!\n", state_idx
);
502 pd
->tcp_state_table
[state_off
+state_idx
].next_state
[cp
->state
];
505 if (new_state
!= cp
->state
) {
506 struct ip_vs_dest
*dest
= cp
->dest
;
508 IP_VS_DBG_BUF(8, "%s %s [%c%c%c%c] %s:%d->"
509 "%s:%d state: %s->%s conn->refcnt:%d\n",
511 ((state_off
== TCP_DIR_OUTPUT
) ?
512 "output " : "input "),
517 IP_VS_DBG_ADDR(cp
->af
, &cp
->daddr
),
519 IP_VS_DBG_ADDR(cp
->af
, &cp
->caddr
),
521 tcp_state_name(cp
->state
),
522 tcp_state_name(new_state
),
523 atomic_read(&cp
->refcnt
));
526 if (!(cp
->flags
& IP_VS_CONN_F_INACTIVE
) &&
527 (new_state
!= IP_VS_TCP_S_ESTABLISHED
)) {
528 atomic_dec(&dest
->activeconns
);
529 atomic_inc(&dest
->inactconns
);
530 cp
->flags
|= IP_VS_CONN_F_INACTIVE
;
531 } else if ((cp
->flags
& IP_VS_CONN_F_INACTIVE
) &&
532 (new_state
== IP_VS_TCP_S_ESTABLISHED
)) {
533 atomic_inc(&dest
->activeconns
);
534 atomic_dec(&dest
->inactconns
);
535 cp
->flags
&= ~IP_VS_CONN_F_INACTIVE
;
541 cp
->timeout
= pd
->timeout_table
[cp
->state
= new_state
];
542 else /* What to do ? */
543 cp
->timeout
= tcp_timeouts
[cp
->state
= new_state
];
547 * Handle state transitions
550 tcp_state_transition(struct ip_vs_conn
*cp
, int direction
,
551 const struct sk_buff
*skb
,
552 struct ip_vs_proto_data
*pd
)
554 struct tcphdr _tcph
, *th
;
556 #ifdef CONFIG_IP_VS_IPV6
557 int ihl
= cp
->af
== AF_INET
? ip_hdrlen(skb
) : sizeof(struct ipv6hdr
);
559 int ihl
= ip_hdrlen(skb
);
562 th
= skb_header_pointer(skb
, ihl
, sizeof(_tcph
), &_tcph
);
566 spin_lock(&cp
->lock
);
567 set_tcp_state(pd
, cp
, direction
, th
);
568 spin_unlock(&cp
->lock
);
571 static inline __u16
tcp_app_hashkey(__be16 port
)
573 return (((__force u16
)port
>> TCP_APP_TAB_BITS
) ^ (__force u16
)port
)
578 static int tcp_register_app(struct net
*net
, struct ip_vs_app
*inc
)
582 __be16 port
= inc
->port
;
584 struct netns_ipvs
*ipvs
= net_ipvs(net
);
585 struct ip_vs_proto_data
*pd
= ip_vs_proto_data_get(net
, IPPROTO_TCP
);
587 hash
= tcp_app_hashkey(port
);
589 spin_lock_bh(&ipvs
->tcp_app_lock
);
590 list_for_each_entry(i
, &ipvs
->tcp_apps
[hash
], p_list
) {
591 if (i
->port
== port
) {
596 list_add(&inc
->p_list
, &ipvs
->tcp_apps
[hash
]);
597 atomic_inc(&pd
->appcnt
);
600 spin_unlock_bh(&ipvs
->tcp_app_lock
);
606 tcp_unregister_app(struct net
*net
, struct ip_vs_app
*inc
)
608 struct netns_ipvs
*ipvs
= net_ipvs(net
);
609 struct ip_vs_proto_data
*pd
= ip_vs_proto_data_get(net
, IPPROTO_TCP
);
611 spin_lock_bh(&ipvs
->tcp_app_lock
);
612 atomic_dec(&pd
->appcnt
);
613 list_del(&inc
->p_list
);
614 spin_unlock_bh(&ipvs
->tcp_app_lock
);
619 tcp_app_conn_bind(struct ip_vs_conn
*cp
)
621 struct netns_ipvs
*ipvs
= net_ipvs(ip_vs_conn_net(cp
));
623 struct ip_vs_app
*inc
;
626 /* Default binding: bind app only for NAT */
627 if (IP_VS_FWD_METHOD(cp
) != IP_VS_CONN_F_MASQ
)
630 /* Lookup application incarnations and bind the right one */
631 hash
= tcp_app_hashkey(cp
->vport
);
633 spin_lock(&ipvs
->tcp_app_lock
);
634 list_for_each_entry(inc
, &ipvs
->tcp_apps
[hash
], p_list
) {
635 if (inc
->port
== cp
->vport
) {
636 if (unlikely(!ip_vs_app_inc_get(inc
)))
638 spin_unlock(&ipvs
->tcp_app_lock
);
640 IP_VS_DBG_BUF(9, "%s(): Binding conn %s:%u->"
641 "%s:%u to app %s on port %u\n",
643 IP_VS_DBG_ADDR(cp
->af
, &cp
->caddr
),
645 IP_VS_DBG_ADDR(cp
->af
, &cp
->vaddr
),
647 inc
->name
, ntohs(inc
->port
));
651 result
= inc
->init_conn(inc
, cp
);
655 spin_unlock(&ipvs
->tcp_app_lock
);
663 * Set LISTEN timeout. (ip_vs_conn_put will setup timer)
665 void ip_vs_tcp_conn_listen(struct net
*net
, struct ip_vs_conn
*cp
)
667 struct ip_vs_proto_data
*pd
= ip_vs_proto_data_get(net
, IPPROTO_TCP
);
669 spin_lock(&cp
->lock
);
670 cp
->state
= IP_VS_TCP_S_LISTEN
;
671 cp
->timeout
= (pd
? pd
->timeout_table
[IP_VS_TCP_S_LISTEN
]
672 : tcp_timeouts
[IP_VS_TCP_S_LISTEN
]);
673 spin_unlock(&cp
->lock
);
676 /* ---------------------------------------------
677 * timeouts is netns related now.
678 * ---------------------------------------------
680 static int __ip_vs_tcp_init(struct net
*net
, struct ip_vs_proto_data
*pd
)
682 struct netns_ipvs
*ipvs
= net_ipvs(net
);
684 ip_vs_init_hash_table(ipvs
->tcp_apps
, TCP_APP_TAB_SIZE
);
685 spin_lock_init(&ipvs
->tcp_app_lock
);
686 pd
->timeout_table
= ip_vs_create_timeout_table((int *)tcp_timeouts
,
687 sizeof(tcp_timeouts
));
688 if (!pd
->timeout_table
)
690 pd
->tcp_state_table
= tcp_states
;
694 static void __ip_vs_tcp_exit(struct net
*net
, struct ip_vs_proto_data
*pd
)
696 kfree(pd
->timeout_table
);
700 struct ip_vs_protocol ip_vs_protocol_tcp
= {
702 .protocol
= IPPROTO_TCP
,
703 .num_states
= IP_VS_TCP_S_LAST
,
707 .init_netns
= __ip_vs_tcp_init
,
708 .exit_netns
= __ip_vs_tcp_exit
,
709 .register_app
= tcp_register_app
,
710 .unregister_app
= tcp_unregister_app
,
711 .conn_schedule
= tcp_conn_schedule
,
712 .conn_in_get
= ip_vs_conn_in_get_proto
,
713 .conn_out_get
= ip_vs_conn_out_get_proto
,
714 .snat_handler
= tcp_snat_handler
,
715 .dnat_handler
= tcp_dnat_handler
,
716 .csum_check
= tcp_csum_check
,
717 .state_name
= tcp_state_name
,
718 .state_transition
= tcp_state_transition
,
719 .app_conn_bind
= tcp_app_conn_bind
,
720 .debug_packet
= ip_vs_tcpudp_debug_packet
,
721 .timeout_change
= tcp_timeout_change
,