Commit | Line | Data |
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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 <linux/stat.h> |
35 | #include <linux/proc_fs.h> | |
36 | #include <linux/seq_file.h> | |
57b47a53 | 37 | #include <linux/mutex.h> |
1da177e4 LT |
38 | |
39 | #include <net/ip_vs.h> | |
40 | ||
41 | EXPORT_SYMBOL(register_ip_vs_app); | |
42 | EXPORT_SYMBOL(unregister_ip_vs_app); | |
43 | EXPORT_SYMBOL(register_ip_vs_app_inc); | |
44 | ||
736561a0 SH |
45 | static DEFINE_MUTEX(__ip_vs_app_mutex); |
46 | ||
1da177e4 LT |
47 | /* |
48 | * Get an ip_vs_app object | |
49 | */ | |
50 | static inline int ip_vs_app_get(struct ip_vs_app *app) | |
51 | { | |
85b60680 | 52 | return try_module_get(app->module); |
1da177e4 LT |
53 | } |
54 | ||
55 | ||
56 | static inline void ip_vs_app_put(struct ip_vs_app *app) | |
57 | { | |
85b60680 | 58 | module_put(app->module); |
1da177e4 LT |
59 | } |
60 | ||
61 | ||
62 | /* | |
63 | * Allocate/initialize app incarnation and register it in proto apps. | |
64 | */ | |
65 | static int | |
ab8a5e84 HS |
66 | ip_vs_app_inc_new(struct net *net, struct ip_vs_app *app, __u16 proto, |
67 | __u16 port) | |
1da177e4 LT |
68 | { |
69 | struct ip_vs_protocol *pp; | |
70 | struct ip_vs_app *inc; | |
71 | int ret; | |
72 | ||
73 | if (!(pp = ip_vs_proto_get(proto))) | |
74 | return -EPROTONOSUPPORT; | |
75 | ||
76 | if (!pp->unregister_app) | |
77 | return -EOPNOTSUPP; | |
78 | ||
8b2ed4bb | 79 | inc = kmemdup(app, sizeof(*inc), GFP_KERNEL); |
1da177e4 LT |
80 | if (!inc) |
81 | return -ENOMEM; | |
1da177e4 LT |
82 | INIT_LIST_HEAD(&inc->p_list); |
83 | INIT_LIST_HEAD(&inc->incs_list); | |
84 | inc->app = app; | |
85 | inc->port = htons(port); | |
86 | atomic_set(&inc->usecnt, 0); | |
87 | ||
88 | if (app->timeouts) { | |
89 | inc->timeout_table = | |
90 | ip_vs_create_timeout_table(app->timeouts, | |
91 | app->timeouts_size); | |
92 | if (!inc->timeout_table) { | |
93 | ret = -ENOMEM; | |
94 | goto out; | |
95 | } | |
96 | } | |
97 | ||
ab8a5e84 | 98 | ret = pp->register_app(net, inc); |
1da177e4 LT |
99 | if (ret) |
100 | goto out; | |
101 | ||
102 | list_add(&inc->a_list, &app->incs_list); | |
26c15cfd JA |
103 | IP_VS_DBG(9, "%s App %s:%u registered\n", |
104 | pp->name, inc->name, ntohs(inc->port)); | |
1da177e4 LT |
105 | |
106 | return 0; | |
107 | ||
108 | out: | |
a51482bd | 109 | kfree(inc->timeout_table); |
1da177e4 LT |
110 | kfree(inc); |
111 | return ret; | |
112 | } | |
113 | ||
114 | ||
115 | /* | |
116 | * Release app incarnation | |
117 | */ | |
118 | static void | |
ab8a5e84 | 119 | ip_vs_app_inc_release(struct net *net, struct ip_vs_app *inc) |
1da177e4 LT |
120 | { |
121 | struct ip_vs_protocol *pp; | |
122 | ||
123 | if (!(pp = ip_vs_proto_get(inc->protocol))) | |
124 | return; | |
125 | ||
126 | if (pp->unregister_app) | |
ab8a5e84 | 127 | pp->unregister_app(net, inc); |
1da177e4 LT |
128 | |
129 | IP_VS_DBG(9, "%s App %s:%u unregistered\n", | |
26c15cfd | 130 | pp->name, inc->name, ntohs(inc->port)); |
1da177e4 LT |
131 | |
132 | list_del(&inc->a_list); | |
133 | ||
a51482bd | 134 | kfree(inc->timeout_table); |
1da177e4 LT |
135 | kfree(inc); |
136 | } | |
137 | ||
138 | ||
139 | /* | |
140 | * Get reference to app inc (only called from softirq) | |
141 | * | |
142 | */ | |
143 | int ip_vs_app_inc_get(struct ip_vs_app *inc) | |
144 | { | |
145 | int result; | |
146 | ||
147 | atomic_inc(&inc->usecnt); | |
148 | if (unlikely((result = ip_vs_app_get(inc->app)) != 1)) | |
149 | atomic_dec(&inc->usecnt); | |
150 | return result; | |
151 | } | |
152 | ||
153 | ||
154 | /* | |
155 | * Put the app inc (only called from timer or net softirq) | |
156 | */ | |
157 | void ip_vs_app_inc_put(struct ip_vs_app *inc) | |
158 | { | |
159 | ip_vs_app_put(inc->app); | |
160 | atomic_dec(&inc->usecnt); | |
161 | } | |
162 | ||
163 | ||
164 | /* | |
165 | * Register an application incarnation in protocol applications | |
166 | */ | |
167 | int | |
ab8a5e84 HS |
168 | register_ip_vs_app_inc(struct net *net, struct ip_vs_app *app, __u16 proto, |
169 | __u16 port) | |
1da177e4 LT |
170 | { |
171 | int result; | |
172 | ||
736561a0 | 173 | mutex_lock(&__ip_vs_app_mutex); |
1da177e4 | 174 | |
ab8a5e84 | 175 | result = ip_vs_app_inc_new(net, app, proto, port); |
1da177e4 | 176 | |
736561a0 | 177 | mutex_unlock(&__ip_vs_app_mutex); |
1da177e4 LT |
178 | |
179 | return result; | |
180 | } | |
181 | ||
182 | ||
183 | /* | |
184 | * ip_vs_app registration routine | |
185 | */ | |
ab8a5e84 | 186 | int register_ip_vs_app(struct net *net, struct ip_vs_app *app) |
1da177e4 | 187 | { |
ab8a5e84 | 188 | struct netns_ipvs *ipvs = net_ipvs(net); |
1da177e4 LT |
189 | /* increase the module use count */ |
190 | ip_vs_use_count_inc(); | |
191 | ||
736561a0 | 192 | mutex_lock(&__ip_vs_app_mutex); |
1da177e4 | 193 | |
ab8a5e84 | 194 | list_add(&app->a_list, &ipvs->app_list); |
1da177e4 | 195 | |
736561a0 | 196 | mutex_unlock(&__ip_vs_app_mutex); |
1da177e4 LT |
197 | |
198 | return 0; | |
199 | } | |
200 | ||
201 | ||
202 | /* | |
203 | * ip_vs_app unregistration routine | |
204 | * We are sure there are no app incarnations attached to services | |
205 | */ | |
ab8a5e84 | 206 | void unregister_ip_vs_app(struct net *net, struct ip_vs_app *app) |
1da177e4 LT |
207 | { |
208 | struct ip_vs_app *inc, *nxt; | |
209 | ||
736561a0 | 210 | mutex_lock(&__ip_vs_app_mutex); |
1da177e4 LT |
211 | |
212 | list_for_each_entry_safe(inc, nxt, &app->incs_list, a_list) { | |
ab8a5e84 | 213 | ip_vs_app_inc_release(net, inc); |
1da177e4 LT |
214 | } |
215 | ||
216 | list_del(&app->a_list); | |
217 | ||
736561a0 | 218 | mutex_unlock(&__ip_vs_app_mutex); |
1da177e4 LT |
219 | |
220 | /* decrease the module use count */ | |
221 | ip_vs_use_count_dec(); | |
222 | } | |
223 | ||
224 | ||
1da177e4 LT |
225 | /* |
226 | * Bind ip_vs_conn to its ip_vs_app (called by cp constructor) | |
227 | */ | |
ab8a5e84 HS |
228 | int ip_vs_bind_app(struct ip_vs_conn *cp, |
229 | struct ip_vs_protocol *pp) | |
1da177e4 LT |
230 | { |
231 | return pp->app_conn_bind(cp); | |
232 | } | |
233 | ||
234 | ||
235 | /* | |
236 | * Unbind cp from application incarnation (called by cp destructor) | |
237 | */ | |
238 | void ip_vs_unbind_app(struct ip_vs_conn *cp) | |
239 | { | |
240 | struct ip_vs_app *inc = cp->app; | |
241 | ||
242 | if (!inc) | |
243 | return; | |
244 | ||
245 | if (inc->unbind_conn) | |
246 | inc->unbind_conn(inc, cp); | |
247 | if (inc->done_conn) | |
248 | inc->done_conn(inc, cp); | |
249 | ip_vs_app_inc_put(inc); | |
250 | cp->app = NULL; | |
251 | } | |
252 | ||
253 | ||
254 | /* | |
255 | * Fixes th->seq based on ip_vs_seq info. | |
256 | */ | |
257 | static inline void vs_fix_seq(const struct ip_vs_seq *vseq, struct tcphdr *th) | |
258 | { | |
259 | __u32 seq = ntohl(th->seq); | |
260 | ||
261 | /* | |
262 | * Adjust seq with delta-offset for all packets after | |
263 | * the most recent resized pkt seq and with previous_delta offset | |
264 | * for all packets before most recent resized pkt seq. | |
265 | */ | |
266 | if (vseq->delta || vseq->previous_delta) { | |
267 | if(after(seq, vseq->init_seq)) { | |
268 | th->seq = htonl(seq + vseq->delta); | |
1e3e238e HE |
269 | IP_VS_DBG(9, "%s(): added delta (%d) to seq\n", |
270 | __func__, vseq->delta); | |
1da177e4 LT |
271 | } else { |
272 | th->seq = htonl(seq + vseq->previous_delta); | |
1e3e238e HE |
273 | IP_VS_DBG(9, "%s(): added previous_delta (%d) to seq\n", |
274 | __func__, vseq->previous_delta); | |
1da177e4 LT |
275 | } |
276 | } | |
277 | } | |
278 | ||
279 | ||
280 | /* | |
281 | * Fixes th->ack_seq based on ip_vs_seq info. | |
282 | */ | |
283 | static inline void | |
284 | vs_fix_ack_seq(const struct ip_vs_seq *vseq, struct tcphdr *th) | |
285 | { | |
286 | __u32 ack_seq = ntohl(th->ack_seq); | |
287 | ||
288 | /* | |
289 | * Adjust ack_seq with delta-offset for | |
290 | * the packets AFTER most recent resized pkt has caused a shift | |
291 | * for packets before most recent resized pkt, use previous_delta | |
292 | */ | |
293 | if (vseq->delta || vseq->previous_delta) { | |
294 | /* since ack_seq is the number of octet that is expected | |
295 | to receive next, so compare it with init_seq+delta */ | |
296 | if(after(ack_seq, vseq->init_seq+vseq->delta)) { | |
297 | th->ack_seq = htonl(ack_seq - vseq->delta); | |
1e3e238e HE |
298 | IP_VS_DBG(9, "%s(): subtracted delta " |
299 | "(%d) from ack_seq\n", __func__, vseq->delta); | |
1da177e4 LT |
300 | |
301 | } else { | |
302 | th->ack_seq = htonl(ack_seq - vseq->previous_delta); | |
1e3e238e | 303 | IP_VS_DBG(9, "%s(): subtracted " |
1da177e4 | 304 | "previous_delta (%d) from ack_seq\n", |
1e3e238e | 305 | __func__, vseq->previous_delta); |
1da177e4 LT |
306 | } |
307 | } | |
308 | } | |
309 | ||
310 | ||
311 | /* | |
312 | * Updates ip_vs_seq if pkt has been resized | |
313 | * Assumes already checked proto==IPPROTO_TCP and diff!=0. | |
314 | */ | |
315 | static inline void vs_seq_update(struct ip_vs_conn *cp, struct ip_vs_seq *vseq, | |
95c96174 | 316 | unsigned int flag, __u32 seq, int diff) |
1da177e4 LT |
317 | { |
318 | /* spinlock is to keep updating cp->flags atomic */ | |
319 | spin_lock(&cp->lock); | |
320 | if (!(cp->flags & flag) || after(seq, vseq->init_seq)) { | |
321 | vseq->previous_delta = vseq->delta; | |
322 | vseq->delta += diff; | |
323 | vseq->init_seq = seq; | |
324 | cp->flags |= flag; | |
325 | } | |
326 | spin_unlock(&cp->lock); | |
327 | } | |
328 | ||
3db05fea | 329 | static inline int app_tcp_pkt_out(struct ip_vs_conn *cp, struct sk_buff *skb, |
1da177e4 LT |
330 | struct ip_vs_app *app) |
331 | { | |
332 | int diff; | |
3db05fea | 333 | const unsigned int tcp_offset = ip_hdrlen(skb); |
1da177e4 LT |
334 | struct tcphdr *th; |
335 | __u32 seq; | |
336 | ||
3db05fea | 337 | if (!skb_make_writable(skb, tcp_offset + sizeof(*th))) |
1da177e4 LT |
338 | return 0; |
339 | ||
3db05fea | 340 | th = (struct tcphdr *)(skb_network_header(skb) + tcp_offset); |
1da177e4 LT |
341 | |
342 | /* | |
343 | * Remember seq number in case this pkt gets resized | |
344 | */ | |
345 | seq = ntohl(th->seq); | |
346 | ||
347 | /* | |
348 | * Fix seq stuff if flagged as so. | |
349 | */ | |
350 | if (cp->flags & IP_VS_CONN_F_OUT_SEQ) | |
351 | vs_fix_seq(&cp->out_seq, th); | |
352 | if (cp->flags & IP_VS_CONN_F_IN_SEQ) | |
353 | vs_fix_ack_seq(&cp->in_seq, th); | |
354 | ||
355 | /* | |
356 | * Call private output hook function | |
357 | */ | |
358 | if (app->pkt_out == NULL) | |
359 | return 1; | |
360 | ||
3db05fea | 361 | if (!app->pkt_out(app, cp, skb, &diff)) |
1da177e4 LT |
362 | return 0; |
363 | ||
364 | /* | |
365 | * Update ip_vs seq stuff if len has changed. | |
366 | */ | |
367 | if (diff != 0) | |
368 | vs_seq_update(cp, &cp->out_seq, | |
369 | IP_VS_CONN_F_OUT_SEQ, seq, diff); | |
370 | ||
371 | return 1; | |
372 | } | |
373 | ||
374 | /* | |
375 | * Output pkt hook. Will call bound ip_vs_app specific function | |
376 | * called by ipvs packet handler, assumes previously checked cp!=NULL | |
377 | * returns false if it can't handle packet (oom) | |
378 | */ | |
3db05fea | 379 | int ip_vs_app_pkt_out(struct ip_vs_conn *cp, struct sk_buff *skb) |
1da177e4 LT |
380 | { |
381 | struct ip_vs_app *app; | |
382 | ||
383 | /* | |
384 | * check if application module is bound to | |
385 | * this ip_vs_conn. | |
386 | */ | |
387 | if ((app = cp->app) == NULL) | |
388 | return 1; | |
389 | ||
390 | /* TCP is complicated */ | |
391 | if (cp->protocol == IPPROTO_TCP) | |
3db05fea | 392 | return app_tcp_pkt_out(cp, skb, app); |
1da177e4 LT |
393 | |
394 | /* | |
395 | * Call private output hook function | |
396 | */ | |
397 | if (app->pkt_out == NULL) | |
398 | return 1; | |
399 | ||
3db05fea | 400 | return app->pkt_out(app, cp, skb, NULL); |
1da177e4 LT |
401 | } |
402 | ||
403 | ||
3db05fea | 404 | static inline int app_tcp_pkt_in(struct ip_vs_conn *cp, struct sk_buff *skb, |
1da177e4 LT |
405 | struct ip_vs_app *app) |
406 | { | |
407 | int diff; | |
3db05fea | 408 | const unsigned int tcp_offset = ip_hdrlen(skb); |
1da177e4 LT |
409 | struct tcphdr *th; |
410 | __u32 seq; | |
411 | ||
3db05fea | 412 | if (!skb_make_writable(skb, tcp_offset + sizeof(*th))) |
1da177e4 LT |
413 | return 0; |
414 | ||
3db05fea | 415 | th = (struct tcphdr *)(skb_network_header(skb) + tcp_offset); |
1da177e4 LT |
416 | |
417 | /* | |
418 | * Remember seq number in case this pkt gets resized | |
419 | */ | |
420 | seq = ntohl(th->seq); | |
421 | ||
422 | /* | |
423 | * Fix seq stuff if flagged as so. | |
424 | */ | |
425 | if (cp->flags & IP_VS_CONN_F_IN_SEQ) | |
426 | vs_fix_seq(&cp->in_seq, th); | |
427 | if (cp->flags & IP_VS_CONN_F_OUT_SEQ) | |
428 | vs_fix_ack_seq(&cp->out_seq, th); | |
429 | ||
430 | /* | |
431 | * Call private input hook function | |
432 | */ | |
433 | if (app->pkt_in == NULL) | |
434 | return 1; | |
435 | ||
3db05fea | 436 | if (!app->pkt_in(app, cp, skb, &diff)) |
1da177e4 LT |
437 | return 0; |
438 | ||
439 | /* | |
440 | * Update ip_vs seq stuff if len has changed. | |
441 | */ | |
442 | if (diff != 0) | |
443 | vs_seq_update(cp, &cp->in_seq, | |
444 | IP_VS_CONN_F_IN_SEQ, seq, diff); | |
445 | ||
446 | return 1; | |
447 | } | |
448 | ||
449 | /* | |
450 | * Input pkt hook. Will call bound ip_vs_app specific function | |
451 | * called by ipvs packet handler, assumes previously checked cp!=NULL. | |
452 | * returns false if can't handle packet (oom). | |
453 | */ | |
3db05fea | 454 | int ip_vs_app_pkt_in(struct ip_vs_conn *cp, struct sk_buff *skb) |
1da177e4 LT |
455 | { |
456 | struct ip_vs_app *app; | |
457 | ||
458 | /* | |
459 | * check if application module is bound to | |
460 | * this ip_vs_conn. | |
461 | */ | |
462 | if ((app = cp->app) == NULL) | |
463 | return 1; | |
464 | ||
465 | /* TCP is complicated */ | |
466 | if (cp->protocol == IPPROTO_TCP) | |
3db05fea | 467 | return app_tcp_pkt_in(cp, skb, app); |
1da177e4 LT |
468 | |
469 | /* | |
470 | * Call private input hook function | |
471 | */ | |
472 | if (app->pkt_in == NULL) | |
473 | return 1; | |
474 | ||
3db05fea | 475 | return app->pkt_in(app, cp, skb, NULL); |
1da177e4 LT |
476 | } |
477 | ||
478 | ||
479 | #ifdef CONFIG_PROC_FS | |
480 | /* | |
481 | * /proc/net/ip_vs_app entry function | |
482 | */ | |
483 | ||
ab8a5e84 | 484 | static struct ip_vs_app *ip_vs_app_idx(struct netns_ipvs *ipvs, loff_t pos) |
1da177e4 LT |
485 | { |
486 | struct ip_vs_app *app, *inc; | |
487 | ||
ab8a5e84 | 488 | list_for_each_entry(app, &ipvs->app_list, a_list) { |
1da177e4 LT |
489 | list_for_each_entry(inc, &app->incs_list, a_list) { |
490 | if (pos-- == 0) | |
491 | return inc; | |
492 | } | |
493 | } | |
494 | return NULL; | |
495 | ||
496 | } | |
497 | ||
498 | static void *ip_vs_app_seq_start(struct seq_file *seq, loff_t *pos) | |
499 | { | |
ab8a5e84 HS |
500 | struct net *net = seq_file_net(seq); |
501 | struct netns_ipvs *ipvs = net_ipvs(net); | |
502 | ||
736561a0 | 503 | mutex_lock(&__ip_vs_app_mutex); |
1da177e4 | 504 | |
ab8a5e84 | 505 | return *pos ? ip_vs_app_idx(ipvs, *pos - 1) : SEQ_START_TOKEN; |
1da177e4 LT |
506 | } |
507 | ||
508 | static void *ip_vs_app_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
509 | { | |
510 | struct ip_vs_app *inc, *app; | |
511 | struct list_head *e; | |
ab8a5e84 HS |
512 | struct net *net = seq_file_net(seq); |
513 | struct netns_ipvs *ipvs = net_ipvs(net); | |
1da177e4 LT |
514 | |
515 | ++*pos; | |
516 | if (v == SEQ_START_TOKEN) | |
ab8a5e84 | 517 | return ip_vs_app_idx(ipvs, 0); |
1da177e4 LT |
518 | |
519 | inc = v; | |
520 | app = inc->app; | |
521 | ||
522 | if ((e = inc->a_list.next) != &app->incs_list) | |
523 | return list_entry(e, struct ip_vs_app, a_list); | |
524 | ||
525 | /* go on to next application */ | |
ab8a5e84 | 526 | for (e = app->a_list.next; e != &ipvs->app_list; e = e->next) { |
1da177e4 LT |
527 | app = list_entry(e, struct ip_vs_app, a_list); |
528 | list_for_each_entry(inc, &app->incs_list, a_list) { | |
529 | return inc; | |
530 | } | |
531 | } | |
532 | return NULL; | |
533 | } | |
534 | ||
535 | static void ip_vs_app_seq_stop(struct seq_file *seq, void *v) | |
536 | { | |
736561a0 | 537 | mutex_unlock(&__ip_vs_app_mutex); |
1da177e4 LT |
538 | } |
539 | ||
540 | static int ip_vs_app_seq_show(struct seq_file *seq, void *v) | |
541 | { | |
542 | if (v == SEQ_START_TOKEN) | |
543 | seq_puts(seq, "prot port usecnt name\n"); | |
544 | else { | |
545 | const struct ip_vs_app *inc = v; | |
546 | ||
547 | seq_printf(seq, "%-3s %-7u %-6d %-17s\n", | |
548 | ip_vs_proto_name(inc->protocol), | |
549 | ntohs(inc->port), | |
550 | atomic_read(&inc->usecnt), | |
551 | inc->name); | |
552 | } | |
553 | return 0; | |
554 | } | |
555 | ||
56b3d975 | 556 | static const struct seq_operations ip_vs_app_seq_ops = { |
1da177e4 LT |
557 | .start = ip_vs_app_seq_start, |
558 | .next = ip_vs_app_seq_next, | |
559 | .stop = ip_vs_app_seq_stop, | |
560 | .show = ip_vs_app_seq_show, | |
561 | }; | |
562 | ||
563 | static int ip_vs_app_open(struct inode *inode, struct file *file) | |
564 | { | |
ab8a5e84 HS |
565 | return seq_open_net(inode, file, &ip_vs_app_seq_ops, |
566 | sizeof(struct seq_net_private)); | |
1da177e4 LT |
567 | } |
568 | ||
9a32144e | 569 | static const struct file_operations ip_vs_app_fops = { |
1da177e4 LT |
570 | .owner = THIS_MODULE, |
571 | .open = ip_vs_app_open, | |
572 | .read = seq_read, | |
573 | .llseek = seq_lseek, | |
0f08190f | 574 | .release = seq_release_net, |
1da177e4 LT |
575 | }; |
576 | #endif | |
577 | ||
503cf15a | 578 | int __net_init ip_vs_app_net_init(struct net *net) |
1da177e4 | 579 | { |
ab8a5e84 HS |
580 | struct netns_ipvs *ipvs = net_ipvs(net); |
581 | ||
ab8a5e84 | 582 | INIT_LIST_HEAD(&ipvs->app_list); |
61b1ab45 | 583 | proc_net_fops_create(net, "ip_vs_app", 0, &ip_vs_app_fops); |
1da177e4 LT |
584 | return 0; |
585 | } | |
586 | ||
503cf15a | 587 | void __net_exit ip_vs_app_net_cleanup(struct net *net) |
61b1ab45 HS |
588 | { |
589 | proc_net_remove(net, "ip_vs_app"); | |
590 | } |