Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * ip_vs_app.c: Application module support for IPVS | |
3 | * | |
1da177e4 LT |
4 | * Authors: Wensong Zhang <wensong@linuxvirtualserver.org> |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | * | |
11 | * Most code here is taken from ip_masq_app.c in kernel 2.2. The difference | |
12 | * is that ip_vs_app module handles the reverse direction (incoming requests | |
13 | * and outgoing responses). | |
14 | * | |
15 | * IP_MASQ_APP application masquerading module | |
16 | * | |
17 | * Author: Juan Jose Ciarlante, <jjciarla@raiz.uncu.edu.ar> | |
18 | * | |
19 | */ | |
20 | ||
9aada7ac HE |
21 | #define KMSG_COMPONENT "IPVS" |
22 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
23 | ||
1da177e4 LT |
24 | #include <linux/module.h> |
25 | #include <linux/kernel.h> | |
26 | #include <linux/skbuff.h> | |
27 | #include <linux/in.h> | |
28 | #include <linux/ip.h> | |
af1e1cf0 | 29 | #include <linux/netfilter.h> |
5a0e3ad6 | 30 | #include <linux/slab.h> |
457c4cbc | 31 | #include <net/net_namespace.h> |
1da177e4 | 32 | #include <net/protocol.h> |
c752f073 | 33 | #include <net/tcp.h> |
1da177e4 LT |
34 | #include <asm/system.h> |
35 | #include <linux/stat.h> | |
36 | #include <linux/proc_fs.h> | |
37 | #include <linux/seq_file.h> | |
57b47a53 | 38 | #include <linux/mutex.h> |
1da177e4 LT |
39 | |
40 | #include <net/ip_vs.h> | |
41 | ||
42 | EXPORT_SYMBOL(register_ip_vs_app); | |
43 | EXPORT_SYMBOL(unregister_ip_vs_app); | |
44 | EXPORT_SYMBOL(register_ip_vs_app_inc); | |
45 | ||
736561a0 SH |
46 | static DEFINE_MUTEX(__ip_vs_app_mutex); |
47 | ||
1da177e4 LT |
48 | /* |
49 | * Get an ip_vs_app object | |
50 | */ | |
51 | static inline int ip_vs_app_get(struct ip_vs_app *app) | |
52 | { | |
85b60680 | 53 | return try_module_get(app->module); |
1da177e4 LT |
54 | } |
55 | ||
56 | ||
57 | static inline void ip_vs_app_put(struct ip_vs_app *app) | |
58 | { | |
85b60680 | 59 | module_put(app->module); |
1da177e4 LT |
60 | } |
61 | ||
62 | ||
63 | /* | |
64 | * Allocate/initialize app incarnation and register it in proto apps. | |
65 | */ | |
66 | static int | |
ab8a5e84 HS |
67 | ip_vs_app_inc_new(struct net *net, struct ip_vs_app *app, __u16 proto, |
68 | __u16 port) | |
1da177e4 LT |
69 | { |
70 | struct ip_vs_protocol *pp; | |
71 | struct ip_vs_app *inc; | |
72 | int ret; | |
73 | ||
74 | if (!(pp = ip_vs_proto_get(proto))) | |
75 | return -EPROTONOSUPPORT; | |
76 | ||
77 | if (!pp->unregister_app) | |
78 | return -EOPNOTSUPP; | |
79 | ||
8b2ed4bb | 80 | inc = kmemdup(app, sizeof(*inc), GFP_KERNEL); |
1da177e4 LT |
81 | if (!inc) |
82 | return -ENOMEM; | |
1da177e4 LT |
83 | INIT_LIST_HEAD(&inc->p_list); |
84 | INIT_LIST_HEAD(&inc->incs_list); | |
85 | inc->app = app; | |
86 | inc->port = htons(port); | |
87 | atomic_set(&inc->usecnt, 0); | |
88 | ||
89 | if (app->timeouts) { | |
90 | inc->timeout_table = | |
91 | ip_vs_create_timeout_table(app->timeouts, | |
92 | app->timeouts_size); | |
93 | if (!inc->timeout_table) { | |
94 | ret = -ENOMEM; | |
95 | goto out; | |
96 | } | |
97 | } | |
98 | ||
ab8a5e84 | 99 | ret = pp->register_app(net, inc); |
1da177e4 LT |
100 | if (ret) |
101 | goto out; | |
102 | ||
103 | list_add(&inc->a_list, &app->incs_list); | |
26c15cfd JA |
104 | IP_VS_DBG(9, "%s App %s:%u registered\n", |
105 | pp->name, inc->name, ntohs(inc->port)); | |
1da177e4 LT |
106 | |
107 | return 0; | |
108 | ||
109 | out: | |
a51482bd | 110 | kfree(inc->timeout_table); |
1da177e4 LT |
111 | kfree(inc); |
112 | return ret; | |
113 | } | |
114 | ||
115 | ||
116 | /* | |
117 | * Release app incarnation | |
118 | */ | |
119 | static void | |
ab8a5e84 | 120 | ip_vs_app_inc_release(struct net *net, struct ip_vs_app *inc) |
1da177e4 LT |
121 | { |
122 | struct ip_vs_protocol *pp; | |
123 | ||
124 | if (!(pp = ip_vs_proto_get(inc->protocol))) | |
125 | return; | |
126 | ||
127 | if (pp->unregister_app) | |
ab8a5e84 | 128 | pp->unregister_app(net, inc); |
1da177e4 LT |
129 | |
130 | IP_VS_DBG(9, "%s App %s:%u unregistered\n", | |
26c15cfd | 131 | pp->name, inc->name, ntohs(inc->port)); |
1da177e4 LT |
132 | |
133 | list_del(&inc->a_list); | |
134 | ||
a51482bd | 135 | kfree(inc->timeout_table); |
1da177e4 LT |
136 | kfree(inc); |
137 | } | |
138 | ||
139 | ||
140 | /* | |
141 | * Get reference to app inc (only called from softirq) | |
142 | * | |
143 | */ | |
144 | int ip_vs_app_inc_get(struct ip_vs_app *inc) | |
145 | { | |
146 | int result; | |
147 | ||
148 | atomic_inc(&inc->usecnt); | |
149 | if (unlikely((result = ip_vs_app_get(inc->app)) != 1)) | |
150 | atomic_dec(&inc->usecnt); | |
151 | return result; | |
152 | } | |
153 | ||
154 | ||
155 | /* | |
156 | * Put the app inc (only called from timer or net softirq) | |
157 | */ | |
158 | void ip_vs_app_inc_put(struct ip_vs_app *inc) | |
159 | { | |
160 | ip_vs_app_put(inc->app); | |
161 | atomic_dec(&inc->usecnt); | |
162 | } | |
163 | ||
164 | ||
165 | /* | |
166 | * Register an application incarnation in protocol applications | |
167 | */ | |
168 | int | |
ab8a5e84 HS |
169 | register_ip_vs_app_inc(struct net *net, struct ip_vs_app *app, __u16 proto, |
170 | __u16 port) | |
1da177e4 LT |
171 | { |
172 | int result; | |
173 | ||
736561a0 | 174 | mutex_lock(&__ip_vs_app_mutex); |
1da177e4 | 175 | |
ab8a5e84 | 176 | result = ip_vs_app_inc_new(net, app, proto, port); |
1da177e4 | 177 | |
736561a0 | 178 | mutex_unlock(&__ip_vs_app_mutex); |
1da177e4 LT |
179 | |
180 | return result; | |
181 | } | |
182 | ||
183 | ||
184 | /* | |
185 | * ip_vs_app registration routine | |
186 | */ | |
ab8a5e84 | 187 | int register_ip_vs_app(struct net *net, struct ip_vs_app *app) |
1da177e4 | 188 | { |
ab8a5e84 | 189 | struct netns_ipvs *ipvs = net_ipvs(net); |
1da177e4 LT |
190 | /* increase the module use count */ |
191 | ip_vs_use_count_inc(); | |
192 | ||
736561a0 | 193 | mutex_lock(&__ip_vs_app_mutex); |
1da177e4 | 194 | |
ab8a5e84 | 195 | list_add(&app->a_list, &ipvs->app_list); |
1da177e4 | 196 | |
736561a0 | 197 | mutex_unlock(&__ip_vs_app_mutex); |
1da177e4 LT |
198 | |
199 | return 0; | |
200 | } | |
201 | ||
202 | ||
203 | /* | |
204 | * ip_vs_app unregistration routine | |
205 | * We are sure there are no app incarnations attached to services | |
206 | */ | |
ab8a5e84 | 207 | void unregister_ip_vs_app(struct net *net, struct ip_vs_app *app) |
1da177e4 LT |
208 | { |
209 | struct ip_vs_app *inc, *nxt; | |
210 | ||
736561a0 | 211 | mutex_lock(&__ip_vs_app_mutex); |
1da177e4 LT |
212 | |
213 | list_for_each_entry_safe(inc, nxt, &app->incs_list, a_list) { | |
ab8a5e84 | 214 | ip_vs_app_inc_release(net, inc); |
1da177e4 LT |
215 | } |
216 | ||
217 | list_del(&app->a_list); | |
218 | ||
736561a0 | 219 | mutex_unlock(&__ip_vs_app_mutex); |
1da177e4 LT |
220 | |
221 | /* decrease the module use count */ | |
222 | ip_vs_use_count_dec(); | |
223 | } | |
224 | ||
225 | ||
1da177e4 LT |
226 | /* |
227 | * Bind ip_vs_conn to its ip_vs_app (called by cp constructor) | |
228 | */ | |
ab8a5e84 HS |
229 | int ip_vs_bind_app(struct ip_vs_conn *cp, |
230 | struct ip_vs_protocol *pp) | |
1da177e4 LT |
231 | { |
232 | return pp->app_conn_bind(cp); | |
233 | } | |
234 | ||
235 | ||
236 | /* | |
237 | * Unbind cp from application incarnation (called by cp destructor) | |
238 | */ | |
239 | void ip_vs_unbind_app(struct ip_vs_conn *cp) | |
240 | { | |
241 | struct ip_vs_app *inc = cp->app; | |
242 | ||
243 | if (!inc) | |
244 | return; | |
245 | ||
246 | if (inc->unbind_conn) | |
247 | inc->unbind_conn(inc, cp); | |
248 | if (inc->done_conn) | |
249 | inc->done_conn(inc, cp); | |
250 | ip_vs_app_inc_put(inc); | |
251 | cp->app = NULL; | |
252 | } | |
253 | ||
254 | ||
255 | /* | |
256 | * Fixes th->seq based on ip_vs_seq info. | |
257 | */ | |
258 | static inline void vs_fix_seq(const struct ip_vs_seq *vseq, struct tcphdr *th) | |
259 | { | |
260 | __u32 seq = ntohl(th->seq); | |
261 | ||
262 | /* | |
263 | * Adjust seq with delta-offset for all packets after | |
264 | * the most recent resized pkt seq and with previous_delta offset | |
265 | * for all packets before most recent resized pkt seq. | |
266 | */ | |
267 | if (vseq->delta || vseq->previous_delta) { | |
268 | if(after(seq, vseq->init_seq)) { | |
269 | th->seq = htonl(seq + vseq->delta); | |
1e3e238e HE |
270 | IP_VS_DBG(9, "%s(): added delta (%d) to seq\n", |
271 | __func__, vseq->delta); | |
1da177e4 LT |
272 | } else { |
273 | th->seq = htonl(seq + vseq->previous_delta); | |
1e3e238e HE |
274 | IP_VS_DBG(9, "%s(): added previous_delta (%d) to seq\n", |
275 | __func__, vseq->previous_delta); | |
1da177e4 LT |
276 | } |
277 | } | |
278 | } | |
279 | ||
280 | ||
281 | /* | |
282 | * Fixes th->ack_seq based on ip_vs_seq info. | |
283 | */ | |
284 | static inline void | |
285 | vs_fix_ack_seq(const struct ip_vs_seq *vseq, struct tcphdr *th) | |
286 | { | |
287 | __u32 ack_seq = ntohl(th->ack_seq); | |
288 | ||
289 | /* | |
290 | * Adjust ack_seq with delta-offset for | |
291 | * the packets AFTER most recent resized pkt has caused a shift | |
292 | * for packets before most recent resized pkt, use previous_delta | |
293 | */ | |
294 | if (vseq->delta || vseq->previous_delta) { | |
295 | /* since ack_seq is the number of octet that is expected | |
296 | to receive next, so compare it with init_seq+delta */ | |
297 | if(after(ack_seq, vseq->init_seq+vseq->delta)) { | |
298 | th->ack_seq = htonl(ack_seq - vseq->delta); | |
1e3e238e HE |
299 | IP_VS_DBG(9, "%s(): subtracted delta " |
300 | "(%d) from ack_seq\n", __func__, vseq->delta); | |
1da177e4 LT |
301 | |
302 | } else { | |
303 | th->ack_seq = htonl(ack_seq - vseq->previous_delta); | |
1e3e238e | 304 | IP_VS_DBG(9, "%s(): subtracted " |
1da177e4 | 305 | "previous_delta (%d) from ack_seq\n", |
1e3e238e | 306 | __func__, vseq->previous_delta); |
1da177e4 LT |
307 | } |
308 | } | |
309 | } | |
310 | ||
311 | ||
312 | /* | |
313 | * Updates ip_vs_seq if pkt has been resized | |
314 | * Assumes already checked proto==IPPROTO_TCP and diff!=0. | |
315 | */ | |
316 | static inline void vs_seq_update(struct ip_vs_conn *cp, struct ip_vs_seq *vseq, | |
317 | unsigned flag, __u32 seq, int diff) | |
318 | { | |
319 | /* spinlock is to keep updating cp->flags atomic */ | |
320 | spin_lock(&cp->lock); | |
321 | if (!(cp->flags & flag) || after(seq, vseq->init_seq)) { | |
322 | vseq->previous_delta = vseq->delta; | |
323 | vseq->delta += diff; | |
324 | vseq->init_seq = seq; | |
325 | cp->flags |= flag; | |
326 | } | |
327 | spin_unlock(&cp->lock); | |
328 | } | |
329 | ||
3db05fea | 330 | static inline int app_tcp_pkt_out(struct ip_vs_conn *cp, struct sk_buff *skb, |
1da177e4 LT |
331 | struct ip_vs_app *app) |
332 | { | |
333 | int diff; | |
3db05fea | 334 | const unsigned int tcp_offset = ip_hdrlen(skb); |
1da177e4 LT |
335 | struct tcphdr *th; |
336 | __u32 seq; | |
337 | ||
3db05fea | 338 | if (!skb_make_writable(skb, tcp_offset + sizeof(*th))) |
1da177e4 LT |
339 | return 0; |
340 | ||
3db05fea | 341 | th = (struct tcphdr *)(skb_network_header(skb) + tcp_offset); |
1da177e4 LT |
342 | |
343 | /* | |
344 | * Remember seq number in case this pkt gets resized | |
345 | */ | |
346 | seq = ntohl(th->seq); | |
347 | ||
348 | /* | |
349 | * Fix seq stuff if flagged as so. | |
350 | */ | |
351 | if (cp->flags & IP_VS_CONN_F_OUT_SEQ) | |
352 | vs_fix_seq(&cp->out_seq, th); | |
353 | if (cp->flags & IP_VS_CONN_F_IN_SEQ) | |
354 | vs_fix_ack_seq(&cp->in_seq, th); | |
355 | ||
356 | /* | |
357 | * Call private output hook function | |
358 | */ | |
359 | if (app->pkt_out == NULL) | |
360 | return 1; | |
361 | ||
3db05fea | 362 | if (!app->pkt_out(app, cp, skb, &diff)) |
1da177e4 LT |
363 | return 0; |
364 | ||
365 | /* | |
366 | * Update ip_vs seq stuff if len has changed. | |
367 | */ | |
368 | if (diff != 0) | |
369 | vs_seq_update(cp, &cp->out_seq, | |
370 | IP_VS_CONN_F_OUT_SEQ, seq, diff); | |
371 | ||
372 | return 1; | |
373 | } | |
374 | ||
375 | /* | |
376 | * Output pkt hook. Will call bound ip_vs_app specific function | |
377 | * called by ipvs packet handler, assumes previously checked cp!=NULL | |
378 | * returns false if it can't handle packet (oom) | |
379 | */ | |
3db05fea | 380 | int ip_vs_app_pkt_out(struct ip_vs_conn *cp, struct sk_buff *skb) |
1da177e4 LT |
381 | { |
382 | struct ip_vs_app *app; | |
383 | ||
384 | /* | |
385 | * check if application module is bound to | |
386 | * this ip_vs_conn. | |
387 | */ | |
388 | if ((app = cp->app) == NULL) | |
389 | return 1; | |
390 | ||
391 | /* TCP is complicated */ | |
392 | if (cp->protocol == IPPROTO_TCP) | |
3db05fea | 393 | return app_tcp_pkt_out(cp, skb, app); |
1da177e4 LT |
394 | |
395 | /* | |
396 | * Call private output hook function | |
397 | */ | |
398 | if (app->pkt_out == NULL) | |
399 | return 1; | |
400 | ||
3db05fea | 401 | return app->pkt_out(app, cp, skb, NULL); |
1da177e4 LT |
402 | } |
403 | ||
404 | ||
3db05fea | 405 | static inline int app_tcp_pkt_in(struct ip_vs_conn *cp, struct sk_buff *skb, |
1da177e4 LT |
406 | struct ip_vs_app *app) |
407 | { | |
408 | int diff; | |
3db05fea | 409 | const unsigned int tcp_offset = ip_hdrlen(skb); |
1da177e4 LT |
410 | struct tcphdr *th; |
411 | __u32 seq; | |
412 | ||
3db05fea | 413 | if (!skb_make_writable(skb, tcp_offset + sizeof(*th))) |
1da177e4 LT |
414 | return 0; |
415 | ||
3db05fea | 416 | th = (struct tcphdr *)(skb_network_header(skb) + tcp_offset); |
1da177e4 LT |
417 | |
418 | /* | |
419 | * Remember seq number in case this pkt gets resized | |
420 | */ | |
421 | seq = ntohl(th->seq); | |
422 | ||
423 | /* | |
424 | * Fix seq stuff if flagged as so. | |
425 | */ | |
426 | if (cp->flags & IP_VS_CONN_F_IN_SEQ) | |
427 | vs_fix_seq(&cp->in_seq, th); | |
428 | if (cp->flags & IP_VS_CONN_F_OUT_SEQ) | |
429 | vs_fix_ack_seq(&cp->out_seq, th); | |
430 | ||
431 | /* | |
432 | * Call private input hook function | |
433 | */ | |
434 | if (app->pkt_in == NULL) | |
435 | return 1; | |
436 | ||
3db05fea | 437 | if (!app->pkt_in(app, cp, skb, &diff)) |
1da177e4 LT |
438 | return 0; |
439 | ||
440 | /* | |
441 | * Update ip_vs seq stuff if len has changed. | |
442 | */ | |
443 | if (diff != 0) | |
444 | vs_seq_update(cp, &cp->in_seq, | |
445 | IP_VS_CONN_F_IN_SEQ, seq, diff); | |
446 | ||
447 | return 1; | |
448 | } | |
449 | ||
450 | /* | |
451 | * Input pkt hook. Will call bound ip_vs_app specific function | |
452 | * called by ipvs packet handler, assumes previously checked cp!=NULL. | |
453 | * returns false if can't handle packet (oom). | |
454 | */ | |
3db05fea | 455 | int ip_vs_app_pkt_in(struct ip_vs_conn *cp, struct sk_buff *skb) |
1da177e4 LT |
456 | { |
457 | struct ip_vs_app *app; | |
458 | ||
459 | /* | |
460 | * check if application module is bound to | |
461 | * this ip_vs_conn. | |
462 | */ | |
463 | if ((app = cp->app) == NULL) | |
464 | return 1; | |
465 | ||
466 | /* TCP is complicated */ | |
467 | if (cp->protocol == IPPROTO_TCP) | |
3db05fea | 468 | return app_tcp_pkt_in(cp, skb, app); |
1da177e4 LT |
469 | |
470 | /* | |
471 | * Call private input hook function | |
472 | */ | |
473 | if (app->pkt_in == NULL) | |
474 | return 1; | |
475 | ||
3db05fea | 476 | return app->pkt_in(app, cp, skb, NULL); |
1da177e4 LT |
477 | } |
478 | ||
479 | ||
480 | #ifdef CONFIG_PROC_FS | |
481 | /* | |
482 | * /proc/net/ip_vs_app entry function | |
483 | */ | |
484 | ||
ab8a5e84 | 485 | static struct ip_vs_app *ip_vs_app_idx(struct netns_ipvs *ipvs, loff_t pos) |
1da177e4 LT |
486 | { |
487 | struct ip_vs_app *app, *inc; | |
488 | ||
ab8a5e84 | 489 | list_for_each_entry(app, &ipvs->app_list, a_list) { |
1da177e4 LT |
490 | list_for_each_entry(inc, &app->incs_list, a_list) { |
491 | if (pos-- == 0) | |
492 | return inc; | |
493 | } | |
494 | } | |
495 | return NULL; | |
496 | ||
497 | } | |
498 | ||
499 | static void *ip_vs_app_seq_start(struct seq_file *seq, loff_t *pos) | |
500 | { | |
ab8a5e84 HS |
501 | struct net *net = seq_file_net(seq); |
502 | struct netns_ipvs *ipvs = net_ipvs(net); | |
503 | ||
736561a0 | 504 | mutex_lock(&__ip_vs_app_mutex); |
1da177e4 | 505 | |
ab8a5e84 | 506 | return *pos ? ip_vs_app_idx(ipvs, *pos - 1) : SEQ_START_TOKEN; |
1da177e4 LT |
507 | } |
508 | ||
509 | static void *ip_vs_app_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
510 | { | |
511 | struct ip_vs_app *inc, *app; | |
512 | struct list_head *e; | |
ab8a5e84 HS |
513 | struct net *net = seq_file_net(seq); |
514 | struct netns_ipvs *ipvs = net_ipvs(net); | |
1da177e4 LT |
515 | |
516 | ++*pos; | |
517 | if (v == SEQ_START_TOKEN) | |
ab8a5e84 | 518 | return ip_vs_app_idx(ipvs, 0); |
1da177e4 LT |
519 | |
520 | inc = v; | |
521 | app = inc->app; | |
522 | ||
523 | if ((e = inc->a_list.next) != &app->incs_list) | |
524 | return list_entry(e, struct ip_vs_app, a_list); | |
525 | ||
526 | /* go on to next application */ | |
ab8a5e84 | 527 | for (e = app->a_list.next; e != &ipvs->app_list; e = e->next) { |
1da177e4 LT |
528 | app = list_entry(e, struct ip_vs_app, a_list); |
529 | list_for_each_entry(inc, &app->incs_list, a_list) { | |
530 | return inc; | |
531 | } | |
532 | } | |
533 | return NULL; | |
534 | } | |
535 | ||
536 | static void ip_vs_app_seq_stop(struct seq_file *seq, void *v) | |
537 | { | |
736561a0 | 538 | mutex_unlock(&__ip_vs_app_mutex); |
1da177e4 LT |
539 | } |
540 | ||
541 | static int ip_vs_app_seq_show(struct seq_file *seq, void *v) | |
542 | { | |
543 | if (v == SEQ_START_TOKEN) | |
544 | seq_puts(seq, "prot port usecnt name\n"); | |
545 | else { | |
546 | const struct ip_vs_app *inc = v; | |
547 | ||
548 | seq_printf(seq, "%-3s %-7u %-6d %-17s\n", | |
549 | ip_vs_proto_name(inc->protocol), | |
550 | ntohs(inc->port), | |
551 | atomic_read(&inc->usecnt), | |
552 | inc->name); | |
553 | } | |
554 | return 0; | |
555 | } | |
556 | ||
56b3d975 | 557 | static const struct seq_operations ip_vs_app_seq_ops = { |
1da177e4 LT |
558 | .start = ip_vs_app_seq_start, |
559 | .next = ip_vs_app_seq_next, | |
560 | .stop = ip_vs_app_seq_stop, | |
561 | .show = ip_vs_app_seq_show, | |
562 | }; | |
563 | ||
564 | static int ip_vs_app_open(struct inode *inode, struct file *file) | |
565 | { | |
ab8a5e84 HS |
566 | return seq_open_net(inode, file, &ip_vs_app_seq_ops, |
567 | sizeof(struct seq_net_private)); | |
1da177e4 LT |
568 | } |
569 | ||
9a32144e | 570 | static const struct file_operations ip_vs_app_fops = { |
1da177e4 LT |
571 | .owner = THIS_MODULE, |
572 | .open = ip_vs_app_open, | |
573 | .read = seq_read, | |
574 | .llseek = seq_lseek, | |
0f08190f | 575 | .release = seq_release_net, |
1da177e4 LT |
576 | }; |
577 | #endif | |
578 | ||
503cf15a | 579 | int __net_init ip_vs_app_net_init(struct net *net) |
1da177e4 | 580 | { |
ab8a5e84 HS |
581 | struct netns_ipvs *ipvs = net_ipvs(net); |
582 | ||
ab8a5e84 | 583 | INIT_LIST_HEAD(&ipvs->app_list); |
61b1ab45 | 584 | proc_net_fops_create(net, "ip_vs_app", 0, &ip_vs_app_fops); |
1da177e4 LT |
585 | return 0; |
586 | } | |
587 | ||
503cf15a | 588 | void __net_exit ip_vs_app_net_cleanup(struct net *net) |
61b1ab45 HS |
589 | { |
590 | proc_net_remove(net, "ip_vs_app"); | |
591 | } |