Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * IPVS An implementation of the IP virtual server support for the | |
3 | * LINUX operating system. IPVS is now implemented as a module | |
4 | * over the NetFilter framework. IPVS can be used to build a | |
5 | * high-performance and highly available server based on a | |
6 | * cluster of servers. | |
7 | * | |
1da177e4 LT |
8 | * Authors: Wensong Zhang <wensong@linuxvirtualserver.org> |
9 | * Peter Kese <peter.kese@ijs.si> | |
10 | * Julian Anastasov <ja@ssi.bg> | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or | |
13 | * modify it under the terms of the GNU General Public License | |
14 | * as published by the Free Software Foundation; either version | |
15 | * 2 of the License, or (at your option) any later version. | |
16 | * | |
17 | * Changes: | |
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/init.h> | |
26 | #include <linux/types.h> | |
4fc268d2 | 27 | #include <linux/capability.h> |
1da177e4 LT |
28 | #include <linux/fs.h> |
29 | #include <linux/sysctl.h> | |
30 | #include <linux/proc_fs.h> | |
31 | #include <linux/workqueue.h> | |
32 | #include <linux/swap.h> | |
1da177e4 LT |
33 | #include <linux/seq_file.h> |
34 | ||
35 | #include <linux/netfilter.h> | |
36 | #include <linux/netfilter_ipv4.h> | |
14cc3e2b | 37 | #include <linux/mutex.h> |
1da177e4 | 38 | |
457c4cbc | 39 | #include <net/net_namespace.h> |
1da177e4 | 40 | #include <net/ip.h> |
09571c7a VB |
41 | #ifdef CONFIG_IP_VS_IPV6 |
42 | #include <net/ipv6.h> | |
43 | #include <net/ip6_route.h> | |
44 | #endif | |
14c85021 | 45 | #include <net/route.h> |
1da177e4 | 46 | #include <net/sock.h> |
9a812198 | 47 | #include <net/genetlink.h> |
1da177e4 LT |
48 | |
49 | #include <asm/uaccess.h> | |
50 | ||
51 | #include <net/ip_vs.h> | |
52 | ||
53 | /* semaphore for IPVS sockopts. And, [gs]etsockopt may sleep. */ | |
14cc3e2b | 54 | static DEFINE_MUTEX(__ip_vs_mutex); |
1da177e4 LT |
55 | |
56 | /* lock for service table */ | |
57 | static DEFINE_RWLOCK(__ip_vs_svc_lock); | |
58 | ||
59 | /* lock for table with the real services */ | |
60 | static DEFINE_RWLOCK(__ip_vs_rs_lock); | |
61 | ||
62 | /* lock for state and timeout tables */ | |
63 | static DEFINE_RWLOCK(__ip_vs_securetcp_lock); | |
64 | ||
65 | /* lock for drop entry handling */ | |
66 | static DEFINE_SPINLOCK(__ip_vs_dropentry_lock); | |
67 | ||
68 | /* lock for drop packet handling */ | |
69 | static DEFINE_SPINLOCK(__ip_vs_droppacket_lock); | |
70 | ||
71 | /* 1/rate drop and drop-entry variables */ | |
72 | int ip_vs_drop_rate = 0; | |
73 | int ip_vs_drop_counter = 0; | |
74 | static atomic_t ip_vs_dropentry = ATOMIC_INIT(0); | |
75 | ||
76 | /* number of virtual services */ | |
77 | static int ip_vs_num_services = 0; | |
78 | ||
79 | /* sysctl variables */ | |
80 | static int sysctl_ip_vs_drop_entry = 0; | |
81 | static int sysctl_ip_vs_drop_packet = 0; | |
82 | static int sysctl_ip_vs_secure_tcp = 0; | |
83 | static int sysctl_ip_vs_amemthresh = 1024; | |
84 | static int sysctl_ip_vs_am_droprate = 10; | |
85 | int sysctl_ip_vs_cache_bypass = 0; | |
86 | int sysctl_ip_vs_expire_nodest_conn = 0; | |
87 | int sysctl_ip_vs_expire_quiescent_template = 0; | |
88 | int sysctl_ip_vs_sync_threshold[2] = { 3, 50 }; | |
89 | int sysctl_ip_vs_nat_icmp_send = 0; | |
90 | ||
91 | ||
92 | #ifdef CONFIG_IP_VS_DEBUG | |
93 | static int sysctl_ip_vs_debug_level = 0; | |
94 | ||
95 | int ip_vs_get_debug_level(void) | |
96 | { | |
97 | return sysctl_ip_vs_debug_level; | |
98 | } | |
99 | #endif | |
100 | ||
09571c7a VB |
101 | #ifdef CONFIG_IP_VS_IPV6 |
102 | /* Taken from rt6_fill_node() in net/ipv6/route.c, is there a better way? */ | |
103 | static int __ip_vs_addr_is_local_v6(const struct in6_addr *addr) | |
104 | { | |
105 | struct rt6_info *rt; | |
106 | struct flowi fl = { | |
107 | .oif = 0, | |
108 | .nl_u = { | |
109 | .ip6_u = { | |
110 | .daddr = *addr, | |
111 | .saddr = { .s6_addr32 = {0, 0, 0, 0} }, } }, | |
112 | }; | |
113 | ||
114 | rt = (struct rt6_info *)ip6_route_output(&init_net, NULL, &fl); | |
115 | if (rt && rt->rt6i_dev && (rt->rt6i_dev->flags & IFF_LOOPBACK)) | |
116 | return 1; | |
117 | ||
118 | return 0; | |
119 | } | |
120 | #endif | |
1da177e4 | 121 | /* |
af9debd4 JA |
122 | * update_defense_level is called from keventd and from sysctl, |
123 | * so it needs to protect itself from softirqs | |
1da177e4 LT |
124 | */ |
125 | static void update_defense_level(void) | |
126 | { | |
127 | struct sysinfo i; | |
128 | static int old_secure_tcp = 0; | |
129 | int availmem; | |
130 | int nomem; | |
131 | int to_change = -1; | |
132 | ||
133 | /* we only count free and buffered memory (in pages) */ | |
134 | si_meminfo(&i); | |
135 | availmem = i.freeram + i.bufferram; | |
136 | /* however in linux 2.5 the i.bufferram is total page cache size, | |
137 | we need adjust it */ | |
138 | /* si_swapinfo(&i); */ | |
139 | /* availmem = availmem - (i.totalswap - i.freeswap); */ | |
140 | ||
141 | nomem = (availmem < sysctl_ip_vs_amemthresh); | |
142 | ||
af9debd4 JA |
143 | local_bh_disable(); |
144 | ||
1da177e4 LT |
145 | /* drop_entry */ |
146 | spin_lock(&__ip_vs_dropentry_lock); | |
147 | switch (sysctl_ip_vs_drop_entry) { | |
148 | case 0: | |
149 | atomic_set(&ip_vs_dropentry, 0); | |
150 | break; | |
151 | case 1: | |
152 | if (nomem) { | |
153 | atomic_set(&ip_vs_dropentry, 1); | |
154 | sysctl_ip_vs_drop_entry = 2; | |
155 | } else { | |
156 | atomic_set(&ip_vs_dropentry, 0); | |
157 | } | |
158 | break; | |
159 | case 2: | |
160 | if (nomem) { | |
161 | atomic_set(&ip_vs_dropentry, 1); | |
162 | } else { | |
163 | atomic_set(&ip_vs_dropentry, 0); | |
164 | sysctl_ip_vs_drop_entry = 1; | |
165 | }; | |
166 | break; | |
167 | case 3: | |
168 | atomic_set(&ip_vs_dropentry, 1); | |
169 | break; | |
170 | } | |
171 | spin_unlock(&__ip_vs_dropentry_lock); | |
172 | ||
173 | /* drop_packet */ | |
174 | spin_lock(&__ip_vs_droppacket_lock); | |
175 | switch (sysctl_ip_vs_drop_packet) { | |
176 | case 0: | |
177 | ip_vs_drop_rate = 0; | |
178 | break; | |
179 | case 1: | |
180 | if (nomem) { | |
181 | ip_vs_drop_rate = ip_vs_drop_counter | |
182 | = sysctl_ip_vs_amemthresh / | |
183 | (sysctl_ip_vs_amemthresh-availmem); | |
184 | sysctl_ip_vs_drop_packet = 2; | |
185 | } else { | |
186 | ip_vs_drop_rate = 0; | |
187 | } | |
188 | break; | |
189 | case 2: | |
190 | if (nomem) { | |
191 | ip_vs_drop_rate = ip_vs_drop_counter | |
192 | = sysctl_ip_vs_amemthresh / | |
193 | (sysctl_ip_vs_amemthresh-availmem); | |
194 | } else { | |
195 | ip_vs_drop_rate = 0; | |
196 | sysctl_ip_vs_drop_packet = 1; | |
197 | } | |
198 | break; | |
199 | case 3: | |
200 | ip_vs_drop_rate = sysctl_ip_vs_am_droprate; | |
201 | break; | |
202 | } | |
203 | spin_unlock(&__ip_vs_droppacket_lock); | |
204 | ||
205 | /* secure_tcp */ | |
206 | write_lock(&__ip_vs_securetcp_lock); | |
207 | switch (sysctl_ip_vs_secure_tcp) { | |
208 | case 0: | |
209 | if (old_secure_tcp >= 2) | |
210 | to_change = 0; | |
211 | break; | |
212 | case 1: | |
213 | if (nomem) { | |
214 | if (old_secure_tcp < 2) | |
215 | to_change = 1; | |
216 | sysctl_ip_vs_secure_tcp = 2; | |
217 | } else { | |
218 | if (old_secure_tcp >= 2) | |
219 | to_change = 0; | |
220 | } | |
221 | break; | |
222 | case 2: | |
223 | if (nomem) { | |
224 | if (old_secure_tcp < 2) | |
225 | to_change = 1; | |
226 | } else { | |
227 | if (old_secure_tcp >= 2) | |
228 | to_change = 0; | |
229 | sysctl_ip_vs_secure_tcp = 1; | |
230 | } | |
231 | break; | |
232 | case 3: | |
233 | if (old_secure_tcp < 2) | |
234 | to_change = 1; | |
235 | break; | |
236 | } | |
237 | old_secure_tcp = sysctl_ip_vs_secure_tcp; | |
238 | if (to_change >= 0) | |
239 | ip_vs_protocol_timeout_change(sysctl_ip_vs_secure_tcp>1); | |
240 | write_unlock(&__ip_vs_securetcp_lock); | |
af9debd4 JA |
241 | |
242 | local_bh_enable(); | |
1da177e4 LT |
243 | } |
244 | ||
245 | ||
246 | /* | |
247 | * Timer for checking the defense | |
248 | */ | |
249 | #define DEFENSE_TIMER_PERIOD 1*HZ | |
c4028958 DH |
250 | static void defense_work_handler(struct work_struct *work); |
251 | static DECLARE_DELAYED_WORK(defense_work, defense_work_handler); | |
1da177e4 | 252 | |
c4028958 | 253 | static void defense_work_handler(struct work_struct *work) |
1da177e4 LT |
254 | { |
255 | update_defense_level(); | |
256 | if (atomic_read(&ip_vs_dropentry)) | |
257 | ip_vs_random_dropentry(); | |
258 | ||
259 | schedule_delayed_work(&defense_work, DEFENSE_TIMER_PERIOD); | |
260 | } | |
261 | ||
262 | int | |
263 | ip_vs_use_count_inc(void) | |
264 | { | |
265 | return try_module_get(THIS_MODULE); | |
266 | } | |
267 | ||
268 | void | |
269 | ip_vs_use_count_dec(void) | |
270 | { | |
271 | module_put(THIS_MODULE); | |
272 | } | |
273 | ||
274 | ||
275 | /* | |
276 | * Hash table: for virtual service lookups | |
277 | */ | |
278 | #define IP_VS_SVC_TAB_BITS 8 | |
279 | #define IP_VS_SVC_TAB_SIZE (1 << IP_VS_SVC_TAB_BITS) | |
280 | #define IP_VS_SVC_TAB_MASK (IP_VS_SVC_TAB_SIZE - 1) | |
281 | ||
282 | /* the service table hashed by <protocol, addr, port> */ | |
283 | static struct list_head ip_vs_svc_table[IP_VS_SVC_TAB_SIZE]; | |
284 | /* the service table hashed by fwmark */ | |
285 | static struct list_head ip_vs_svc_fwm_table[IP_VS_SVC_TAB_SIZE]; | |
286 | ||
287 | /* | |
288 | * Hash table: for real service lookups | |
289 | */ | |
290 | #define IP_VS_RTAB_BITS 4 | |
291 | #define IP_VS_RTAB_SIZE (1 << IP_VS_RTAB_BITS) | |
292 | #define IP_VS_RTAB_MASK (IP_VS_RTAB_SIZE - 1) | |
293 | ||
294 | static struct list_head ip_vs_rtable[IP_VS_RTAB_SIZE]; | |
295 | ||
296 | /* | |
297 | * Trash for destinations | |
298 | */ | |
299 | static LIST_HEAD(ip_vs_dest_trash); | |
300 | ||
301 | /* | |
302 | * FTP & NULL virtual service counters | |
303 | */ | |
304 | static atomic_t ip_vs_ftpsvc_counter = ATOMIC_INIT(0); | |
305 | static atomic_t ip_vs_nullsvc_counter = ATOMIC_INIT(0); | |
306 | ||
307 | ||
308 | /* | |
309 | * Returns hash value for virtual service | |
310 | */ | |
311 | static __inline__ unsigned | |
b18610de JV |
312 | ip_vs_svc_hashkey(int af, unsigned proto, const union nf_inet_addr *addr, |
313 | __be16 port) | |
1da177e4 LT |
314 | { |
315 | register unsigned porth = ntohs(port); | |
b18610de | 316 | __be32 addr_fold = addr->ip; |
1da177e4 | 317 | |
b18610de JV |
318 | #ifdef CONFIG_IP_VS_IPV6 |
319 | if (af == AF_INET6) | |
320 | addr_fold = addr->ip6[0]^addr->ip6[1]^ | |
321 | addr->ip6[2]^addr->ip6[3]; | |
322 | #endif | |
323 | ||
324 | return (proto^ntohl(addr_fold)^(porth>>IP_VS_SVC_TAB_BITS)^porth) | |
1da177e4 LT |
325 | & IP_VS_SVC_TAB_MASK; |
326 | } | |
327 | ||
328 | /* | |
329 | * Returns hash value of fwmark for virtual service lookup | |
330 | */ | |
331 | static __inline__ unsigned ip_vs_svc_fwm_hashkey(__u32 fwmark) | |
332 | { | |
333 | return fwmark & IP_VS_SVC_TAB_MASK; | |
334 | } | |
335 | ||
336 | /* | |
337 | * Hashes a service in the ip_vs_svc_table by <proto,addr,port> | |
338 | * or in the ip_vs_svc_fwm_table by fwmark. | |
339 | * Should be called with locked tables. | |
340 | */ | |
341 | static int ip_vs_svc_hash(struct ip_vs_service *svc) | |
342 | { | |
343 | unsigned hash; | |
344 | ||
345 | if (svc->flags & IP_VS_SVC_F_HASHED) { | |
1e3e238e HE |
346 | pr_err("%s(): request for already hashed, called from %pF\n", |
347 | __func__, __builtin_return_address(0)); | |
1da177e4 LT |
348 | return 0; |
349 | } | |
350 | ||
351 | if (svc->fwmark == 0) { | |
352 | /* | |
353 | * Hash it by <protocol,addr,port> in ip_vs_svc_table | |
354 | */ | |
b18610de | 355 | hash = ip_vs_svc_hashkey(svc->af, svc->protocol, &svc->addr, |
e7ade46a | 356 | svc->port); |
1da177e4 LT |
357 | list_add(&svc->s_list, &ip_vs_svc_table[hash]); |
358 | } else { | |
359 | /* | |
360 | * Hash it by fwmark in ip_vs_svc_fwm_table | |
361 | */ | |
362 | hash = ip_vs_svc_fwm_hashkey(svc->fwmark); | |
363 | list_add(&svc->f_list, &ip_vs_svc_fwm_table[hash]); | |
364 | } | |
365 | ||
366 | svc->flags |= IP_VS_SVC_F_HASHED; | |
367 | /* increase its refcnt because it is referenced by the svc table */ | |
368 | atomic_inc(&svc->refcnt); | |
369 | return 1; | |
370 | } | |
371 | ||
372 | ||
373 | /* | |
374 | * Unhashes a service from ip_vs_svc_table/ip_vs_svc_fwm_table. | |
375 | * Should be called with locked tables. | |
376 | */ | |
377 | static int ip_vs_svc_unhash(struct ip_vs_service *svc) | |
378 | { | |
379 | if (!(svc->flags & IP_VS_SVC_F_HASHED)) { | |
1e3e238e HE |
380 | pr_err("%s(): request for unhash flagged, called from %pF\n", |
381 | __func__, __builtin_return_address(0)); | |
1da177e4 LT |
382 | return 0; |
383 | } | |
384 | ||
385 | if (svc->fwmark == 0) { | |
386 | /* Remove it from the ip_vs_svc_table table */ | |
387 | list_del(&svc->s_list); | |
388 | } else { | |
389 | /* Remove it from the ip_vs_svc_fwm_table table */ | |
390 | list_del(&svc->f_list); | |
391 | } | |
392 | ||
393 | svc->flags &= ~IP_VS_SVC_F_HASHED; | |
394 | atomic_dec(&svc->refcnt); | |
395 | return 1; | |
396 | } | |
397 | ||
398 | ||
399 | /* | |
400 | * Get service by {proto,addr,port} in the service table. | |
401 | */ | |
b18610de JV |
402 | static inline struct ip_vs_service * |
403 | __ip_vs_service_get(int af, __u16 protocol, const union nf_inet_addr *vaddr, | |
404 | __be16 vport) | |
1da177e4 LT |
405 | { |
406 | unsigned hash; | |
407 | struct ip_vs_service *svc; | |
408 | ||
409 | /* Check for "full" addressed entries */ | |
b18610de | 410 | hash = ip_vs_svc_hashkey(af, protocol, vaddr, vport); |
1da177e4 LT |
411 | |
412 | list_for_each_entry(svc, &ip_vs_svc_table[hash], s_list){ | |
b18610de JV |
413 | if ((svc->af == af) |
414 | && ip_vs_addr_equal(af, &svc->addr, vaddr) | |
1da177e4 LT |
415 | && (svc->port == vport) |
416 | && (svc->protocol == protocol)) { | |
417 | /* HIT */ | |
418 | atomic_inc(&svc->usecnt); | |
419 | return svc; | |
420 | } | |
421 | } | |
422 | ||
423 | return NULL; | |
424 | } | |
425 | ||
426 | ||
427 | /* | |
428 | * Get service by {fwmark} in the service table. | |
429 | */ | |
b18610de JV |
430 | static inline struct ip_vs_service * |
431 | __ip_vs_svc_fwm_get(int af, __u32 fwmark) | |
1da177e4 LT |
432 | { |
433 | unsigned hash; | |
434 | struct ip_vs_service *svc; | |
435 | ||
436 | /* Check for fwmark addressed entries */ | |
437 | hash = ip_vs_svc_fwm_hashkey(fwmark); | |
438 | ||
439 | list_for_each_entry(svc, &ip_vs_svc_fwm_table[hash], f_list) { | |
b18610de | 440 | if (svc->fwmark == fwmark && svc->af == af) { |
1da177e4 LT |
441 | /* HIT */ |
442 | atomic_inc(&svc->usecnt); | |
443 | return svc; | |
444 | } | |
445 | } | |
446 | ||
447 | return NULL; | |
448 | } | |
449 | ||
450 | struct ip_vs_service * | |
3c2e0505 JV |
451 | ip_vs_service_get(int af, __u32 fwmark, __u16 protocol, |
452 | const union nf_inet_addr *vaddr, __be16 vport) | |
1da177e4 LT |
453 | { |
454 | struct ip_vs_service *svc; | |
3c2e0505 | 455 | |
1da177e4 LT |
456 | read_lock(&__ip_vs_svc_lock); |
457 | ||
458 | /* | |
459 | * Check the table hashed by fwmark first | |
460 | */ | |
3c2e0505 | 461 | if (fwmark && (svc = __ip_vs_svc_fwm_get(af, fwmark))) |
1da177e4 LT |
462 | goto out; |
463 | ||
464 | /* | |
465 | * Check the table hashed by <protocol,addr,port> | |
466 | * for "full" addressed entries | |
467 | */ | |
3c2e0505 | 468 | svc = __ip_vs_service_get(af, protocol, vaddr, vport); |
1da177e4 LT |
469 | |
470 | if (svc == NULL | |
471 | && protocol == IPPROTO_TCP | |
472 | && atomic_read(&ip_vs_ftpsvc_counter) | |
473 | && (vport == FTPDATA || ntohs(vport) >= PROT_SOCK)) { | |
474 | /* | |
475 | * Check if ftp service entry exists, the packet | |
476 | * might belong to FTP data connections. | |
477 | */ | |
3c2e0505 | 478 | svc = __ip_vs_service_get(af, protocol, vaddr, FTPPORT); |
1da177e4 LT |
479 | } |
480 | ||
481 | if (svc == NULL | |
482 | && atomic_read(&ip_vs_nullsvc_counter)) { | |
483 | /* | |
484 | * Check if the catch-all port (port zero) exists | |
485 | */ | |
3c2e0505 | 486 | svc = __ip_vs_service_get(af, protocol, vaddr, 0); |
1da177e4 LT |
487 | } |
488 | ||
489 | out: | |
490 | read_unlock(&__ip_vs_svc_lock); | |
491 | ||
3c2e0505 JV |
492 | IP_VS_DBG_BUF(9, "lookup service: fwm %u %s %s:%u %s\n", |
493 | fwmark, ip_vs_proto_name(protocol), | |
494 | IP_VS_DBG_ADDR(af, vaddr), ntohs(vport), | |
495 | svc ? "hit" : "not hit"); | |
1da177e4 LT |
496 | |
497 | return svc; | |
498 | } | |
499 | ||
500 | ||
501 | static inline void | |
502 | __ip_vs_bind_svc(struct ip_vs_dest *dest, struct ip_vs_service *svc) | |
503 | { | |
504 | atomic_inc(&svc->refcnt); | |
505 | dest->svc = svc; | |
506 | } | |
507 | ||
508 | static inline void | |
509 | __ip_vs_unbind_svc(struct ip_vs_dest *dest) | |
510 | { | |
511 | struct ip_vs_service *svc = dest->svc; | |
512 | ||
513 | dest->svc = NULL; | |
514 | if (atomic_dec_and_test(&svc->refcnt)) | |
515 | kfree(svc); | |
516 | } | |
517 | ||
518 | ||
519 | /* | |
520 | * Returns hash value for real service | |
521 | */ | |
7937df15 JV |
522 | static inline unsigned ip_vs_rs_hashkey(int af, |
523 | const union nf_inet_addr *addr, | |
524 | __be16 port) | |
1da177e4 LT |
525 | { |
526 | register unsigned porth = ntohs(port); | |
7937df15 JV |
527 | __be32 addr_fold = addr->ip; |
528 | ||
529 | #ifdef CONFIG_IP_VS_IPV6 | |
530 | if (af == AF_INET6) | |
531 | addr_fold = addr->ip6[0]^addr->ip6[1]^ | |
532 | addr->ip6[2]^addr->ip6[3]; | |
533 | #endif | |
1da177e4 | 534 | |
7937df15 | 535 | return (ntohl(addr_fold)^(porth>>IP_VS_RTAB_BITS)^porth) |
1da177e4 LT |
536 | & IP_VS_RTAB_MASK; |
537 | } | |
538 | ||
539 | /* | |
540 | * Hashes ip_vs_dest in ip_vs_rtable by <proto,addr,port>. | |
541 | * should be called with locked tables. | |
542 | */ | |
543 | static int ip_vs_rs_hash(struct ip_vs_dest *dest) | |
544 | { | |
545 | unsigned hash; | |
546 | ||
547 | if (!list_empty(&dest->d_list)) { | |
548 | return 0; | |
549 | } | |
550 | ||
551 | /* | |
552 | * Hash by proto,addr,port, | |
553 | * which are the parameters of the real service. | |
554 | */ | |
7937df15 JV |
555 | hash = ip_vs_rs_hashkey(dest->af, &dest->addr, dest->port); |
556 | ||
1da177e4 LT |
557 | list_add(&dest->d_list, &ip_vs_rtable[hash]); |
558 | ||
559 | return 1; | |
560 | } | |
561 | ||
562 | /* | |
563 | * UNhashes ip_vs_dest from ip_vs_rtable. | |
564 | * should be called with locked tables. | |
565 | */ | |
566 | static int ip_vs_rs_unhash(struct ip_vs_dest *dest) | |
567 | { | |
568 | /* | |
569 | * Remove it from the ip_vs_rtable table. | |
570 | */ | |
571 | if (!list_empty(&dest->d_list)) { | |
572 | list_del(&dest->d_list); | |
573 | INIT_LIST_HEAD(&dest->d_list); | |
574 | } | |
575 | ||
576 | return 1; | |
577 | } | |
578 | ||
579 | /* | |
580 | * Lookup real service by <proto,addr,port> in the real service table. | |
581 | */ | |
582 | struct ip_vs_dest * | |
7937df15 JV |
583 | ip_vs_lookup_real_service(int af, __u16 protocol, |
584 | const union nf_inet_addr *daddr, | |
585 | __be16 dport) | |
1da177e4 LT |
586 | { |
587 | unsigned hash; | |
588 | struct ip_vs_dest *dest; | |
589 | ||
590 | /* | |
591 | * Check for "full" addressed entries | |
592 | * Return the first found entry | |
593 | */ | |
7937df15 | 594 | hash = ip_vs_rs_hashkey(af, daddr, dport); |
1da177e4 LT |
595 | |
596 | read_lock(&__ip_vs_rs_lock); | |
597 | list_for_each_entry(dest, &ip_vs_rtable[hash], d_list) { | |
7937df15 JV |
598 | if ((dest->af == af) |
599 | && ip_vs_addr_equal(af, &dest->addr, daddr) | |
1da177e4 LT |
600 | && (dest->port == dport) |
601 | && ((dest->protocol == protocol) || | |
602 | dest->vfwmark)) { | |
603 | /* HIT */ | |
604 | read_unlock(&__ip_vs_rs_lock); | |
605 | return dest; | |
606 | } | |
607 | } | |
608 | read_unlock(&__ip_vs_rs_lock); | |
609 | ||
610 | return NULL; | |
611 | } | |
612 | ||
613 | /* | |
614 | * Lookup destination by {addr,port} in the given service | |
615 | */ | |
616 | static struct ip_vs_dest * | |
7937df15 JV |
617 | ip_vs_lookup_dest(struct ip_vs_service *svc, const union nf_inet_addr *daddr, |
618 | __be16 dport) | |
1da177e4 LT |
619 | { |
620 | struct ip_vs_dest *dest; | |
621 | ||
622 | /* | |
623 | * Find the destination for the given service | |
624 | */ | |
625 | list_for_each_entry(dest, &svc->destinations, n_list) { | |
7937df15 JV |
626 | if ((dest->af == svc->af) |
627 | && ip_vs_addr_equal(svc->af, &dest->addr, daddr) | |
628 | && (dest->port == dport)) { | |
1da177e4 LT |
629 | /* HIT */ |
630 | return dest; | |
631 | } | |
632 | } | |
633 | ||
634 | return NULL; | |
635 | } | |
636 | ||
1e356f9c RB |
637 | /* |
638 | * Find destination by {daddr,dport,vaddr,protocol} | |
639 | * Cretaed to be used in ip_vs_process_message() in | |
640 | * the backup synchronization daemon. It finds the | |
641 | * destination to be bound to the received connection | |
642 | * on the backup. | |
643 | * | |
644 | * ip_vs_lookup_real_service() looked promissing, but | |
645 | * seems not working as expected. | |
646 | */ | |
7937df15 JV |
647 | struct ip_vs_dest *ip_vs_find_dest(int af, const union nf_inet_addr *daddr, |
648 | __be16 dport, | |
649 | const union nf_inet_addr *vaddr, | |
650 | __be16 vport, __u16 protocol) | |
1e356f9c RB |
651 | { |
652 | struct ip_vs_dest *dest; | |
653 | struct ip_vs_service *svc; | |
654 | ||
7937df15 | 655 | svc = ip_vs_service_get(af, 0, protocol, vaddr, vport); |
1e356f9c RB |
656 | if (!svc) |
657 | return NULL; | |
658 | dest = ip_vs_lookup_dest(svc, daddr, dport); | |
659 | if (dest) | |
660 | atomic_inc(&dest->refcnt); | |
661 | ip_vs_service_put(svc); | |
662 | return dest; | |
663 | } | |
1da177e4 LT |
664 | |
665 | /* | |
666 | * Lookup dest by {svc,addr,port} in the destination trash. | |
667 | * The destination trash is used to hold the destinations that are removed | |
668 | * from the service table but are still referenced by some conn entries. | |
669 | * The reason to add the destination trash is when the dest is temporary | |
670 | * down (either by administrator or by monitor program), the dest can be | |
671 | * picked back from the trash, the remaining connections to the dest can | |
672 | * continue, and the counting information of the dest is also useful for | |
673 | * scheduling. | |
674 | */ | |
675 | static struct ip_vs_dest * | |
7937df15 JV |
676 | ip_vs_trash_get_dest(struct ip_vs_service *svc, const union nf_inet_addr *daddr, |
677 | __be16 dport) | |
1da177e4 LT |
678 | { |
679 | struct ip_vs_dest *dest, *nxt; | |
680 | ||
681 | /* | |
682 | * Find the destination in trash | |
683 | */ | |
684 | list_for_each_entry_safe(dest, nxt, &ip_vs_dest_trash, n_list) { | |
7937df15 JV |
685 | IP_VS_DBG_BUF(3, "Destination %u/%s:%u still in trash, " |
686 | "dest->refcnt=%d\n", | |
687 | dest->vfwmark, | |
688 | IP_VS_DBG_ADDR(svc->af, &dest->addr), | |
689 | ntohs(dest->port), | |
690 | atomic_read(&dest->refcnt)); | |
691 | if (dest->af == svc->af && | |
692 | ip_vs_addr_equal(svc->af, &dest->addr, daddr) && | |
1da177e4 LT |
693 | dest->port == dport && |
694 | dest->vfwmark == svc->fwmark && | |
695 | dest->protocol == svc->protocol && | |
696 | (svc->fwmark || | |
7937df15 | 697 | (ip_vs_addr_equal(svc->af, &dest->vaddr, &svc->addr) && |
1da177e4 LT |
698 | dest->vport == svc->port))) { |
699 | /* HIT */ | |
700 | return dest; | |
701 | } | |
702 | ||
703 | /* | |
704 | * Try to purge the destination from trash if not referenced | |
705 | */ | |
706 | if (atomic_read(&dest->refcnt) == 1) { | |
7937df15 JV |
707 | IP_VS_DBG_BUF(3, "Removing destination %u/%s:%u " |
708 | "from trash\n", | |
709 | dest->vfwmark, | |
710 | IP_VS_DBG_ADDR(svc->af, &dest->addr), | |
711 | ntohs(dest->port)); | |
1da177e4 LT |
712 | list_del(&dest->n_list); |
713 | ip_vs_dst_reset(dest); | |
714 | __ip_vs_unbind_svc(dest); | |
715 | kfree(dest); | |
716 | } | |
717 | } | |
718 | ||
719 | return NULL; | |
720 | } | |
721 | ||
722 | ||
723 | /* | |
724 | * Clean up all the destinations in the trash | |
725 | * Called by the ip_vs_control_cleanup() | |
726 | * | |
727 | * When the ip_vs_control_clearup is activated by ipvs module exit, | |
728 | * the service tables must have been flushed and all the connections | |
729 | * are expired, and the refcnt of each destination in the trash must | |
730 | * be 1, so we simply release them here. | |
731 | */ | |
732 | static void ip_vs_trash_cleanup(void) | |
733 | { | |
734 | struct ip_vs_dest *dest, *nxt; | |
735 | ||
736 | list_for_each_entry_safe(dest, nxt, &ip_vs_dest_trash, n_list) { | |
737 | list_del(&dest->n_list); | |
738 | ip_vs_dst_reset(dest); | |
739 | __ip_vs_unbind_svc(dest); | |
740 | kfree(dest); | |
741 | } | |
742 | } | |
743 | ||
744 | ||
745 | static void | |
746 | ip_vs_zero_stats(struct ip_vs_stats *stats) | |
747 | { | |
748 | spin_lock_bh(&stats->lock); | |
e93615d0 | 749 | |
e9c0ce23 | 750 | memset(&stats->ustats, 0, sizeof(stats->ustats)); |
1da177e4 | 751 | ip_vs_zero_estimator(stats); |
e93615d0 | 752 | |
3a14a313 | 753 | spin_unlock_bh(&stats->lock); |
1da177e4 LT |
754 | } |
755 | ||
756 | /* | |
757 | * Update a destination in the given service | |
758 | */ | |
759 | static void | |
760 | __ip_vs_update_dest(struct ip_vs_service *svc, | |
c860c6b1 | 761 | struct ip_vs_dest *dest, struct ip_vs_dest_user_kern *udest) |
1da177e4 LT |
762 | { |
763 | int conn_flags; | |
764 | ||
765 | /* set the weight and the flags */ | |
766 | atomic_set(&dest->weight, udest->weight); | |
767 | conn_flags = udest->conn_flags | IP_VS_CONN_F_INACTIVE; | |
768 | ||
769 | /* check if local node and update the flags */ | |
09571c7a VB |
770 | #ifdef CONFIG_IP_VS_IPV6 |
771 | if (svc->af == AF_INET6) { | |
772 | if (__ip_vs_addr_is_local_v6(&udest->addr.in6)) { | |
773 | conn_flags = (conn_flags & ~IP_VS_CONN_F_FWD_MASK) | |
774 | | IP_VS_CONN_F_LOCALNODE; | |
775 | } | |
776 | } else | |
777 | #endif | |
778 | if (inet_addr_type(&init_net, udest->addr.ip) == RTN_LOCAL) { | |
779 | conn_flags = (conn_flags & ~IP_VS_CONN_F_FWD_MASK) | |
780 | | IP_VS_CONN_F_LOCALNODE; | |
781 | } | |
1da177e4 LT |
782 | |
783 | /* set the IP_VS_CONN_F_NOOUTPUT flag if not masquerading/NAT */ | |
784 | if ((conn_flags & IP_VS_CONN_F_FWD_MASK) != 0) { | |
785 | conn_flags |= IP_VS_CONN_F_NOOUTPUT; | |
786 | } else { | |
787 | /* | |
788 | * Put the real service in ip_vs_rtable if not present. | |
789 | * For now only for NAT! | |
790 | */ | |
791 | write_lock_bh(&__ip_vs_rs_lock); | |
792 | ip_vs_rs_hash(dest); | |
793 | write_unlock_bh(&__ip_vs_rs_lock); | |
794 | } | |
795 | atomic_set(&dest->conn_flags, conn_flags); | |
796 | ||
797 | /* bind the service */ | |
798 | if (!dest->svc) { | |
799 | __ip_vs_bind_svc(dest, svc); | |
800 | } else { | |
801 | if (dest->svc != svc) { | |
802 | __ip_vs_unbind_svc(dest); | |
803 | ip_vs_zero_stats(&dest->stats); | |
804 | __ip_vs_bind_svc(dest, svc); | |
805 | } | |
806 | } | |
807 | ||
808 | /* set the dest status flags */ | |
809 | dest->flags |= IP_VS_DEST_F_AVAILABLE; | |
810 | ||
811 | if (udest->u_threshold == 0 || udest->u_threshold > dest->u_threshold) | |
812 | dest->flags &= ~IP_VS_DEST_F_OVERLOAD; | |
813 | dest->u_threshold = udest->u_threshold; | |
814 | dest->l_threshold = udest->l_threshold; | |
815 | } | |
816 | ||
817 | ||
818 | /* | |
819 | * Create a destination for the given service | |
820 | */ | |
821 | static int | |
c860c6b1 | 822 | ip_vs_new_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest, |
1da177e4 LT |
823 | struct ip_vs_dest **dest_p) |
824 | { | |
825 | struct ip_vs_dest *dest; | |
826 | unsigned atype; | |
827 | ||
828 | EnterFunction(2); | |
829 | ||
09571c7a VB |
830 | #ifdef CONFIG_IP_VS_IPV6 |
831 | if (svc->af == AF_INET6) { | |
832 | atype = ipv6_addr_type(&udest->addr.in6); | |
3bfb92f4 SW |
833 | if ((!(atype & IPV6_ADDR_UNICAST) || |
834 | atype & IPV6_ADDR_LINKLOCAL) && | |
09571c7a VB |
835 | !__ip_vs_addr_is_local_v6(&udest->addr.in6)) |
836 | return -EINVAL; | |
837 | } else | |
838 | #endif | |
839 | { | |
840 | atype = inet_addr_type(&init_net, udest->addr.ip); | |
841 | if (atype != RTN_LOCAL && atype != RTN_UNICAST) | |
842 | return -EINVAL; | |
843 | } | |
1da177e4 | 844 | |
0da974f4 | 845 | dest = kzalloc(sizeof(struct ip_vs_dest), GFP_ATOMIC); |
1da177e4 | 846 | if (dest == NULL) { |
1e3e238e | 847 | pr_err("%s(): no memory.\n", __func__); |
1da177e4 LT |
848 | return -ENOMEM; |
849 | } | |
1da177e4 | 850 | |
c860c6b1 | 851 | dest->af = svc->af; |
1da177e4 | 852 | dest->protocol = svc->protocol; |
c860c6b1 | 853 | dest->vaddr = svc->addr; |
1da177e4 LT |
854 | dest->vport = svc->port; |
855 | dest->vfwmark = svc->fwmark; | |
c860c6b1 | 856 | ip_vs_addr_copy(svc->af, &dest->addr, &udest->addr); |
1da177e4 LT |
857 | dest->port = udest->port; |
858 | ||
859 | atomic_set(&dest->activeconns, 0); | |
860 | atomic_set(&dest->inactconns, 0); | |
861 | atomic_set(&dest->persistconns, 0); | |
862 | atomic_set(&dest->refcnt, 0); | |
863 | ||
864 | INIT_LIST_HEAD(&dest->d_list); | |
865 | spin_lock_init(&dest->dst_lock); | |
866 | spin_lock_init(&dest->stats.lock); | |
867 | __ip_vs_update_dest(svc, dest, udest); | |
868 | ip_vs_new_estimator(&dest->stats); | |
869 | ||
870 | *dest_p = dest; | |
871 | ||
872 | LeaveFunction(2); | |
873 | return 0; | |
874 | } | |
875 | ||
876 | ||
877 | /* | |
878 | * Add a destination into an existing service | |
879 | */ | |
880 | static int | |
c860c6b1 | 881 | ip_vs_add_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest) |
1da177e4 LT |
882 | { |
883 | struct ip_vs_dest *dest; | |
c860c6b1 | 884 | union nf_inet_addr daddr; |
014d730d | 885 | __be16 dport = udest->port; |
1da177e4 LT |
886 | int ret; |
887 | ||
888 | EnterFunction(2); | |
889 | ||
890 | if (udest->weight < 0) { | |
1e3e238e | 891 | pr_err("%s(): server weight less than zero\n", __func__); |
1da177e4 LT |
892 | return -ERANGE; |
893 | } | |
894 | ||
895 | if (udest->l_threshold > udest->u_threshold) { | |
1e3e238e HE |
896 | pr_err("%s(): lower threshold is higher than upper threshold\n", |
897 | __func__); | |
1da177e4 LT |
898 | return -ERANGE; |
899 | } | |
900 | ||
c860c6b1 JV |
901 | ip_vs_addr_copy(svc->af, &daddr, &udest->addr); |
902 | ||
1da177e4 LT |
903 | /* |
904 | * Check if the dest already exists in the list | |
905 | */ | |
7937df15 JV |
906 | dest = ip_vs_lookup_dest(svc, &daddr, dport); |
907 | ||
1da177e4 | 908 | if (dest != NULL) { |
1e3e238e | 909 | IP_VS_DBG(1, "%s(): dest already exists\n", __func__); |
1da177e4 LT |
910 | return -EEXIST; |
911 | } | |
912 | ||
913 | /* | |
914 | * Check if the dest already exists in the trash and | |
915 | * is from the same service | |
916 | */ | |
7937df15 JV |
917 | dest = ip_vs_trash_get_dest(svc, &daddr, dport); |
918 | ||
1da177e4 | 919 | if (dest != NULL) { |
cfc78c5a JV |
920 | IP_VS_DBG_BUF(3, "Get destination %s:%u from trash, " |
921 | "dest->refcnt=%d, service %u/%s:%u\n", | |
922 | IP_VS_DBG_ADDR(svc->af, &daddr), ntohs(dport), | |
923 | atomic_read(&dest->refcnt), | |
924 | dest->vfwmark, | |
925 | IP_VS_DBG_ADDR(svc->af, &dest->vaddr), | |
926 | ntohs(dest->vport)); | |
927 | ||
1da177e4 LT |
928 | __ip_vs_update_dest(svc, dest, udest); |
929 | ||
930 | /* | |
931 | * Get the destination from the trash | |
932 | */ | |
933 | list_del(&dest->n_list); | |
934 | ||
935 | ip_vs_new_estimator(&dest->stats); | |
936 | ||
937 | write_lock_bh(&__ip_vs_svc_lock); | |
938 | ||
939 | /* | |
940 | * Wait until all other svc users go away. | |
941 | */ | |
942 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1); | |
943 | ||
944 | list_add(&dest->n_list, &svc->destinations); | |
945 | svc->num_dests++; | |
946 | ||
947 | /* call the update_service function of its scheduler */ | |
82dfb6f3 SW |
948 | if (svc->scheduler->update_service) |
949 | svc->scheduler->update_service(svc); | |
1da177e4 LT |
950 | |
951 | write_unlock_bh(&__ip_vs_svc_lock); | |
952 | return 0; | |
953 | } | |
954 | ||
955 | /* | |
956 | * Allocate and initialize the dest structure | |
957 | */ | |
958 | ret = ip_vs_new_dest(svc, udest, &dest); | |
959 | if (ret) { | |
960 | return ret; | |
961 | } | |
962 | ||
963 | /* | |
964 | * Add the dest entry into the list | |
965 | */ | |
966 | atomic_inc(&dest->refcnt); | |
967 | ||
968 | write_lock_bh(&__ip_vs_svc_lock); | |
969 | ||
970 | /* | |
971 | * Wait until all other svc users go away. | |
972 | */ | |
973 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1); | |
974 | ||
975 | list_add(&dest->n_list, &svc->destinations); | |
976 | svc->num_dests++; | |
977 | ||
978 | /* call the update_service function of its scheduler */ | |
82dfb6f3 SW |
979 | if (svc->scheduler->update_service) |
980 | svc->scheduler->update_service(svc); | |
1da177e4 LT |
981 | |
982 | write_unlock_bh(&__ip_vs_svc_lock); | |
983 | ||
984 | LeaveFunction(2); | |
985 | ||
986 | return 0; | |
987 | } | |
988 | ||
989 | ||
990 | /* | |
991 | * Edit a destination in the given service | |
992 | */ | |
993 | static int | |
c860c6b1 | 994 | ip_vs_edit_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest) |
1da177e4 LT |
995 | { |
996 | struct ip_vs_dest *dest; | |
c860c6b1 | 997 | union nf_inet_addr daddr; |
014d730d | 998 | __be16 dport = udest->port; |
1da177e4 LT |
999 | |
1000 | EnterFunction(2); | |
1001 | ||
1002 | if (udest->weight < 0) { | |
1e3e238e | 1003 | pr_err("%s(): server weight less than zero\n", __func__); |
1da177e4 LT |
1004 | return -ERANGE; |
1005 | } | |
1006 | ||
1007 | if (udest->l_threshold > udest->u_threshold) { | |
1e3e238e HE |
1008 | pr_err("%s(): lower threshold is higher than upper threshold\n", |
1009 | __func__); | |
1da177e4 LT |
1010 | return -ERANGE; |
1011 | } | |
1012 | ||
c860c6b1 JV |
1013 | ip_vs_addr_copy(svc->af, &daddr, &udest->addr); |
1014 | ||
1da177e4 LT |
1015 | /* |
1016 | * Lookup the destination list | |
1017 | */ | |
7937df15 JV |
1018 | dest = ip_vs_lookup_dest(svc, &daddr, dport); |
1019 | ||
1da177e4 | 1020 | if (dest == NULL) { |
1e3e238e | 1021 | IP_VS_DBG(1, "%s(): dest doesn't exist\n", __func__); |
1da177e4 LT |
1022 | return -ENOENT; |
1023 | } | |
1024 | ||
1025 | __ip_vs_update_dest(svc, dest, udest); | |
1026 | ||
1027 | write_lock_bh(&__ip_vs_svc_lock); | |
1028 | ||
1029 | /* Wait until all other svc users go away */ | |
cae7ca3d | 1030 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1); |
1da177e4 LT |
1031 | |
1032 | /* call the update_service, because server weight may be changed */ | |
82dfb6f3 SW |
1033 | if (svc->scheduler->update_service) |
1034 | svc->scheduler->update_service(svc); | |
1da177e4 LT |
1035 | |
1036 | write_unlock_bh(&__ip_vs_svc_lock); | |
1037 | ||
1038 | LeaveFunction(2); | |
1039 | ||
1040 | return 0; | |
1041 | } | |
1042 | ||
1043 | ||
1044 | /* | |
1045 | * Delete a destination (must be already unlinked from the service) | |
1046 | */ | |
1047 | static void __ip_vs_del_dest(struct ip_vs_dest *dest) | |
1048 | { | |
1049 | ip_vs_kill_estimator(&dest->stats); | |
1050 | ||
1051 | /* | |
1052 | * Remove it from the d-linked list with the real services. | |
1053 | */ | |
1054 | write_lock_bh(&__ip_vs_rs_lock); | |
1055 | ip_vs_rs_unhash(dest); | |
1056 | write_unlock_bh(&__ip_vs_rs_lock); | |
1057 | ||
1058 | /* | |
1059 | * Decrease the refcnt of the dest, and free the dest | |
1060 | * if nobody refers to it (refcnt=0). Otherwise, throw | |
1061 | * the destination into the trash. | |
1062 | */ | |
1063 | if (atomic_dec_and_test(&dest->refcnt)) { | |
1064 | ip_vs_dst_reset(dest); | |
1065 | /* simply decrease svc->refcnt here, let the caller check | |
1066 | and release the service if nobody refers to it. | |
1067 | Only user context can release destination and service, | |
1068 | and only one user context can update virtual service at a | |
1069 | time, so the operation here is OK */ | |
1070 | atomic_dec(&dest->svc->refcnt); | |
1071 | kfree(dest); | |
1072 | } else { | |
cfc78c5a JV |
1073 | IP_VS_DBG_BUF(3, "Moving dest %s:%u into trash, " |
1074 | "dest->refcnt=%d\n", | |
1075 | IP_VS_DBG_ADDR(dest->af, &dest->addr), | |
1076 | ntohs(dest->port), | |
1077 | atomic_read(&dest->refcnt)); | |
1da177e4 LT |
1078 | list_add(&dest->n_list, &ip_vs_dest_trash); |
1079 | atomic_inc(&dest->refcnt); | |
1080 | } | |
1081 | } | |
1082 | ||
1083 | ||
1084 | /* | |
1085 | * Unlink a destination from the given service | |
1086 | */ | |
1087 | static void __ip_vs_unlink_dest(struct ip_vs_service *svc, | |
1088 | struct ip_vs_dest *dest, | |
1089 | int svcupd) | |
1090 | { | |
1091 | dest->flags &= ~IP_VS_DEST_F_AVAILABLE; | |
1092 | ||
1093 | /* | |
1094 | * Remove it from the d-linked destination list. | |
1095 | */ | |
1096 | list_del(&dest->n_list); | |
1097 | svc->num_dests--; | |
82dfb6f3 SW |
1098 | |
1099 | /* | |
1100 | * Call the update_service function of its scheduler | |
1101 | */ | |
1102 | if (svcupd && svc->scheduler->update_service) | |
1103 | svc->scheduler->update_service(svc); | |
1da177e4 LT |
1104 | } |
1105 | ||
1106 | ||
1107 | /* | |
1108 | * Delete a destination server in the given service | |
1109 | */ | |
1110 | static int | |
c860c6b1 | 1111 | ip_vs_del_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest) |
1da177e4 LT |
1112 | { |
1113 | struct ip_vs_dest *dest; | |
014d730d | 1114 | __be16 dport = udest->port; |
1da177e4 LT |
1115 | |
1116 | EnterFunction(2); | |
1117 | ||
7937df15 | 1118 | dest = ip_vs_lookup_dest(svc, &udest->addr, dport); |
c860c6b1 | 1119 | |
1da177e4 | 1120 | if (dest == NULL) { |
1e3e238e | 1121 | IP_VS_DBG(1, "%s(): destination not found!\n", __func__); |
1da177e4 LT |
1122 | return -ENOENT; |
1123 | } | |
1124 | ||
1125 | write_lock_bh(&__ip_vs_svc_lock); | |
1126 | ||
1127 | /* | |
1128 | * Wait until all other svc users go away. | |
1129 | */ | |
1130 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1); | |
1131 | ||
1132 | /* | |
1133 | * Unlink dest from the service | |
1134 | */ | |
1135 | __ip_vs_unlink_dest(svc, dest, 1); | |
1136 | ||
1137 | write_unlock_bh(&__ip_vs_svc_lock); | |
1138 | ||
1139 | /* | |
1140 | * Delete the destination | |
1141 | */ | |
1142 | __ip_vs_del_dest(dest); | |
1143 | ||
1144 | LeaveFunction(2); | |
1145 | ||
1146 | return 0; | |
1147 | } | |
1148 | ||
1149 | ||
1150 | /* | |
1151 | * Add a service into the service hash table | |
1152 | */ | |
1153 | static int | |
c860c6b1 JV |
1154 | ip_vs_add_service(struct ip_vs_service_user_kern *u, |
1155 | struct ip_vs_service **svc_p) | |
1da177e4 LT |
1156 | { |
1157 | int ret = 0; | |
1158 | struct ip_vs_scheduler *sched = NULL; | |
1159 | struct ip_vs_service *svc = NULL; | |
1160 | ||
1161 | /* increase the module use count */ | |
1162 | ip_vs_use_count_inc(); | |
1163 | ||
1164 | /* Lookup the scheduler by 'u->sched_name' */ | |
1165 | sched = ip_vs_scheduler_get(u->sched_name); | |
1166 | if (sched == NULL) { | |
1e3e238e | 1167 | pr_info("Scheduler module ip_vs_%s not found\n", u->sched_name); |
1da177e4 LT |
1168 | ret = -ENOENT; |
1169 | goto out_mod_dec; | |
1170 | } | |
1171 | ||
f94fd041 | 1172 | #ifdef CONFIG_IP_VS_IPV6 |
48148938 JV |
1173 | if (u->af == AF_INET6 && (u->netmask < 1 || u->netmask > 128)) { |
1174 | ret = -EINVAL; | |
1175 | goto out_err; | |
f94fd041 JV |
1176 | } |
1177 | #endif | |
1178 | ||
0da974f4 | 1179 | svc = kzalloc(sizeof(struct ip_vs_service), GFP_ATOMIC); |
1da177e4 | 1180 | if (svc == NULL) { |
1e3e238e | 1181 | IP_VS_DBG(1, "%s(): no memory\n", __func__); |
1da177e4 LT |
1182 | ret = -ENOMEM; |
1183 | goto out_err; | |
1184 | } | |
1da177e4 LT |
1185 | |
1186 | /* I'm the first user of the service */ | |
1187 | atomic_set(&svc->usecnt, 1); | |
1188 | atomic_set(&svc->refcnt, 0); | |
1189 | ||
c860c6b1 | 1190 | svc->af = u->af; |
1da177e4 | 1191 | svc->protocol = u->protocol; |
c860c6b1 | 1192 | ip_vs_addr_copy(svc->af, &svc->addr, &u->addr); |
1da177e4 LT |
1193 | svc->port = u->port; |
1194 | svc->fwmark = u->fwmark; | |
1195 | svc->flags = u->flags; | |
1196 | svc->timeout = u->timeout * HZ; | |
1197 | svc->netmask = u->netmask; | |
1198 | ||
1199 | INIT_LIST_HEAD(&svc->destinations); | |
1200 | rwlock_init(&svc->sched_lock); | |
1201 | spin_lock_init(&svc->stats.lock); | |
1202 | ||
1203 | /* Bind the scheduler */ | |
1204 | ret = ip_vs_bind_scheduler(svc, sched); | |
1205 | if (ret) | |
1206 | goto out_err; | |
1207 | sched = NULL; | |
1208 | ||
1209 | /* Update the virtual service counters */ | |
1210 | if (svc->port == FTPPORT) | |
1211 | atomic_inc(&ip_vs_ftpsvc_counter); | |
1212 | else if (svc->port == 0) | |
1213 | atomic_inc(&ip_vs_nullsvc_counter); | |
1214 | ||
1215 | ip_vs_new_estimator(&svc->stats); | |
f94fd041 JV |
1216 | |
1217 | /* Count only IPv4 services for old get/setsockopt interface */ | |
1218 | if (svc->af == AF_INET) | |
1219 | ip_vs_num_services++; | |
1da177e4 LT |
1220 | |
1221 | /* Hash the service into the service table */ | |
1222 | write_lock_bh(&__ip_vs_svc_lock); | |
1223 | ip_vs_svc_hash(svc); | |
1224 | write_unlock_bh(&__ip_vs_svc_lock); | |
1225 | ||
1226 | *svc_p = svc; | |
1227 | return 0; | |
1228 | ||
1229 | out_err: | |
1230 | if (svc != NULL) { | |
1231 | if (svc->scheduler) | |
1232 | ip_vs_unbind_scheduler(svc); | |
1233 | if (svc->inc) { | |
1234 | local_bh_disable(); | |
1235 | ip_vs_app_inc_put(svc->inc); | |
1236 | local_bh_enable(); | |
1237 | } | |
1238 | kfree(svc); | |
1239 | } | |
1240 | ip_vs_scheduler_put(sched); | |
1241 | ||
1242 | out_mod_dec: | |
1243 | /* decrease the module use count */ | |
1244 | ip_vs_use_count_dec(); | |
1245 | ||
1246 | return ret; | |
1247 | } | |
1248 | ||
1249 | ||
1250 | /* | |
1251 | * Edit a service and bind it with a new scheduler | |
1252 | */ | |
1253 | static int | |
c860c6b1 | 1254 | ip_vs_edit_service(struct ip_vs_service *svc, struct ip_vs_service_user_kern *u) |
1da177e4 LT |
1255 | { |
1256 | struct ip_vs_scheduler *sched, *old_sched; | |
1257 | int ret = 0; | |
1258 | ||
1259 | /* | |
1260 | * Lookup the scheduler, by 'u->sched_name' | |
1261 | */ | |
1262 | sched = ip_vs_scheduler_get(u->sched_name); | |
1263 | if (sched == NULL) { | |
1e3e238e | 1264 | pr_info("Scheduler module ip_vs_%s not found\n", u->sched_name); |
1da177e4 LT |
1265 | return -ENOENT; |
1266 | } | |
1267 | old_sched = sched; | |
1268 | ||
f94fd041 | 1269 | #ifdef CONFIG_IP_VS_IPV6 |
48148938 JV |
1270 | if (u->af == AF_INET6 && (u->netmask < 1 || u->netmask > 128)) { |
1271 | ret = -EINVAL; | |
1272 | goto out; | |
f94fd041 JV |
1273 | } |
1274 | #endif | |
1275 | ||
1da177e4 LT |
1276 | write_lock_bh(&__ip_vs_svc_lock); |
1277 | ||
1278 | /* | |
1279 | * Wait until all other svc users go away. | |
1280 | */ | |
1281 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1); | |
1282 | ||
1283 | /* | |
1284 | * Set the flags and timeout value | |
1285 | */ | |
1286 | svc->flags = u->flags | IP_VS_SVC_F_HASHED; | |
1287 | svc->timeout = u->timeout * HZ; | |
1288 | svc->netmask = u->netmask; | |
1289 | ||
1290 | old_sched = svc->scheduler; | |
1291 | if (sched != old_sched) { | |
1292 | /* | |
1293 | * Unbind the old scheduler | |
1294 | */ | |
1295 | if ((ret = ip_vs_unbind_scheduler(svc))) { | |
1296 | old_sched = sched; | |
9e691ed6 | 1297 | goto out_unlock; |
1da177e4 LT |
1298 | } |
1299 | ||
1300 | /* | |
1301 | * Bind the new scheduler | |
1302 | */ | |
1303 | if ((ret = ip_vs_bind_scheduler(svc, sched))) { | |
1304 | /* | |
1305 | * If ip_vs_bind_scheduler fails, restore the old | |
1306 | * scheduler. | |
1307 | * The main reason of failure is out of memory. | |
1308 | * | |
1309 | * The question is if the old scheduler can be | |
1310 | * restored all the time. TODO: if it cannot be | |
1311 | * restored some time, we must delete the service, | |
1312 | * otherwise the system may crash. | |
1313 | */ | |
1314 | ip_vs_bind_scheduler(svc, old_sched); | |
1315 | old_sched = sched; | |
9e691ed6 | 1316 | goto out_unlock; |
1da177e4 LT |
1317 | } |
1318 | } | |
1319 | ||
9e691ed6 | 1320 | out_unlock: |
1da177e4 | 1321 | write_unlock_bh(&__ip_vs_svc_lock); |
8d5803bf | 1322 | #ifdef CONFIG_IP_VS_IPV6 |
9e691ed6 | 1323 | out: |
8d5803bf | 1324 | #endif |
1da177e4 LT |
1325 | |
1326 | if (old_sched) | |
1327 | ip_vs_scheduler_put(old_sched); | |
1328 | ||
1329 | return ret; | |
1330 | } | |
1331 | ||
1332 | ||
1333 | /* | |
1334 | * Delete a service from the service list | |
1335 | * - The service must be unlinked, unlocked and not referenced! | |
1336 | * - We are called under _bh lock | |
1337 | */ | |
1338 | static void __ip_vs_del_service(struct ip_vs_service *svc) | |
1339 | { | |
1340 | struct ip_vs_dest *dest, *nxt; | |
1341 | struct ip_vs_scheduler *old_sched; | |
1342 | ||
f94fd041 JV |
1343 | /* Count only IPv4 services for old get/setsockopt interface */ |
1344 | if (svc->af == AF_INET) | |
1345 | ip_vs_num_services--; | |
1346 | ||
1da177e4 LT |
1347 | ip_vs_kill_estimator(&svc->stats); |
1348 | ||
1349 | /* Unbind scheduler */ | |
1350 | old_sched = svc->scheduler; | |
1351 | ip_vs_unbind_scheduler(svc); | |
1352 | if (old_sched) | |
1353 | ip_vs_scheduler_put(old_sched); | |
1354 | ||
1355 | /* Unbind app inc */ | |
1356 | if (svc->inc) { | |
1357 | ip_vs_app_inc_put(svc->inc); | |
1358 | svc->inc = NULL; | |
1359 | } | |
1360 | ||
1361 | /* | |
1362 | * Unlink the whole destination list | |
1363 | */ | |
1364 | list_for_each_entry_safe(dest, nxt, &svc->destinations, n_list) { | |
1365 | __ip_vs_unlink_dest(svc, dest, 0); | |
1366 | __ip_vs_del_dest(dest); | |
1367 | } | |
1368 | ||
1369 | /* | |
1370 | * Update the virtual service counters | |
1371 | */ | |
1372 | if (svc->port == FTPPORT) | |
1373 | atomic_dec(&ip_vs_ftpsvc_counter); | |
1374 | else if (svc->port == 0) | |
1375 | atomic_dec(&ip_vs_nullsvc_counter); | |
1376 | ||
1377 | /* | |
1378 | * Free the service if nobody refers to it | |
1379 | */ | |
1380 | if (atomic_read(&svc->refcnt) == 0) | |
1381 | kfree(svc); | |
1382 | ||
1383 | /* decrease the module use count */ | |
1384 | ip_vs_use_count_dec(); | |
1385 | } | |
1386 | ||
1387 | /* | |
1388 | * Delete a service from the service list | |
1389 | */ | |
1390 | static int ip_vs_del_service(struct ip_vs_service *svc) | |
1391 | { | |
1392 | if (svc == NULL) | |
1393 | return -EEXIST; | |
1394 | ||
1395 | /* | |
1396 | * Unhash it from the service table | |
1397 | */ | |
1398 | write_lock_bh(&__ip_vs_svc_lock); | |
1399 | ||
1400 | ip_vs_svc_unhash(svc); | |
1401 | ||
1402 | /* | |
1403 | * Wait until all the svc users go away. | |
1404 | */ | |
1405 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1); | |
1406 | ||
1407 | __ip_vs_del_service(svc); | |
1408 | ||
1409 | write_unlock_bh(&__ip_vs_svc_lock); | |
1410 | ||
1411 | return 0; | |
1412 | } | |
1413 | ||
1414 | ||
1415 | /* | |
1416 | * Flush all the virtual services | |
1417 | */ | |
1418 | static int ip_vs_flush(void) | |
1419 | { | |
1420 | int idx; | |
1421 | struct ip_vs_service *svc, *nxt; | |
1422 | ||
1423 | /* | |
1424 | * Flush the service table hashed by <protocol,addr,port> | |
1425 | */ | |
1426 | for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
1427 | list_for_each_entry_safe(svc, nxt, &ip_vs_svc_table[idx], s_list) { | |
1428 | write_lock_bh(&__ip_vs_svc_lock); | |
1429 | ip_vs_svc_unhash(svc); | |
1430 | /* | |
1431 | * Wait until all the svc users go away. | |
1432 | */ | |
1433 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 0); | |
1434 | __ip_vs_del_service(svc); | |
1435 | write_unlock_bh(&__ip_vs_svc_lock); | |
1436 | } | |
1437 | } | |
1438 | ||
1439 | /* | |
1440 | * Flush the service table hashed by fwmark | |
1441 | */ | |
1442 | for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
1443 | list_for_each_entry_safe(svc, nxt, | |
1444 | &ip_vs_svc_fwm_table[idx], f_list) { | |
1445 | write_lock_bh(&__ip_vs_svc_lock); | |
1446 | ip_vs_svc_unhash(svc); | |
1447 | /* | |
1448 | * Wait until all the svc users go away. | |
1449 | */ | |
1450 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 0); | |
1451 | __ip_vs_del_service(svc); | |
1452 | write_unlock_bh(&__ip_vs_svc_lock); | |
1453 | } | |
1454 | } | |
1455 | ||
1456 | return 0; | |
1457 | } | |
1458 | ||
1459 | ||
1460 | /* | |
1461 | * Zero counters in a service or all services | |
1462 | */ | |
1463 | static int ip_vs_zero_service(struct ip_vs_service *svc) | |
1464 | { | |
1465 | struct ip_vs_dest *dest; | |
1466 | ||
1467 | write_lock_bh(&__ip_vs_svc_lock); | |
1468 | list_for_each_entry(dest, &svc->destinations, n_list) { | |
1469 | ip_vs_zero_stats(&dest->stats); | |
1470 | } | |
1471 | ip_vs_zero_stats(&svc->stats); | |
1472 | write_unlock_bh(&__ip_vs_svc_lock); | |
1473 | return 0; | |
1474 | } | |
1475 | ||
1476 | static int ip_vs_zero_all(void) | |
1477 | { | |
1478 | int idx; | |
1479 | struct ip_vs_service *svc; | |
1480 | ||
1481 | for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
1482 | list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) { | |
1483 | ip_vs_zero_service(svc); | |
1484 | } | |
1485 | } | |
1486 | ||
1487 | for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
1488 | list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) { | |
1489 | ip_vs_zero_service(svc); | |
1490 | } | |
1491 | } | |
1492 | ||
1493 | ip_vs_zero_stats(&ip_vs_stats); | |
1494 | return 0; | |
1495 | } | |
1496 | ||
1497 | ||
1498 | static int | |
8d65af78 | 1499 | proc_do_defense_mode(ctl_table *table, int write, |
1da177e4 LT |
1500 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1501 | { | |
1502 | int *valp = table->data; | |
1503 | int val = *valp; | |
1504 | int rc; | |
1505 | ||
8d65af78 | 1506 | rc = proc_dointvec(table, write, buffer, lenp, ppos); |
1da177e4 LT |
1507 | if (write && (*valp != val)) { |
1508 | if ((*valp < 0) || (*valp > 3)) { | |
1509 | /* Restore the correct value */ | |
1510 | *valp = val; | |
1511 | } else { | |
1da177e4 | 1512 | update_defense_level(); |
1da177e4 LT |
1513 | } |
1514 | } | |
1515 | return rc; | |
1516 | } | |
1517 | ||
1518 | ||
1519 | static int | |
8d65af78 | 1520 | proc_do_sync_threshold(ctl_table *table, int write, |
1da177e4 LT |
1521 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1522 | { | |
1523 | int *valp = table->data; | |
1524 | int val[2]; | |
1525 | int rc; | |
1526 | ||
1527 | /* backup the value first */ | |
1528 | memcpy(val, valp, sizeof(val)); | |
1529 | ||
8d65af78 | 1530 | rc = proc_dointvec(table, write, buffer, lenp, ppos); |
1da177e4 LT |
1531 | if (write && (valp[0] < 0 || valp[1] < 0 || valp[0] >= valp[1])) { |
1532 | /* Restore the correct value */ | |
1533 | memcpy(valp, val, sizeof(val)); | |
1534 | } | |
1535 | return rc; | |
1536 | } | |
1537 | ||
1538 | ||
1539 | /* | |
1540 | * IPVS sysctl table (under the /proc/sys/net/ipv4/vs/) | |
1541 | */ | |
1542 | ||
1543 | static struct ctl_table vs_vars[] = { | |
1544 | { | |
1da177e4 LT |
1545 | .procname = "amemthresh", |
1546 | .data = &sysctl_ip_vs_amemthresh, | |
1547 | .maxlen = sizeof(int), | |
1548 | .mode = 0644, | |
6d9f239a | 1549 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1550 | }, |
1551 | #ifdef CONFIG_IP_VS_DEBUG | |
1552 | { | |
1da177e4 LT |
1553 | .procname = "debug_level", |
1554 | .data = &sysctl_ip_vs_debug_level, | |
1555 | .maxlen = sizeof(int), | |
1556 | .mode = 0644, | |
6d9f239a | 1557 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1558 | }, |
1559 | #endif | |
1560 | { | |
1da177e4 LT |
1561 | .procname = "am_droprate", |
1562 | .data = &sysctl_ip_vs_am_droprate, | |
1563 | .maxlen = sizeof(int), | |
1564 | .mode = 0644, | |
6d9f239a | 1565 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1566 | }, |
1567 | { | |
1da177e4 LT |
1568 | .procname = "drop_entry", |
1569 | .data = &sysctl_ip_vs_drop_entry, | |
1570 | .maxlen = sizeof(int), | |
1571 | .mode = 0644, | |
6d9f239a | 1572 | .proc_handler = proc_do_defense_mode, |
1da177e4 LT |
1573 | }, |
1574 | { | |
1da177e4 LT |
1575 | .procname = "drop_packet", |
1576 | .data = &sysctl_ip_vs_drop_packet, | |
1577 | .maxlen = sizeof(int), | |
1578 | .mode = 0644, | |
6d9f239a | 1579 | .proc_handler = proc_do_defense_mode, |
1da177e4 LT |
1580 | }, |
1581 | { | |
1da177e4 LT |
1582 | .procname = "secure_tcp", |
1583 | .data = &sysctl_ip_vs_secure_tcp, | |
1584 | .maxlen = sizeof(int), | |
1585 | .mode = 0644, | |
6d9f239a | 1586 | .proc_handler = proc_do_defense_mode, |
1da177e4 LT |
1587 | }, |
1588 | #if 0 | |
1589 | { | |
1da177e4 LT |
1590 | .procname = "timeout_established", |
1591 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_ESTABLISHED], | |
1592 | .maxlen = sizeof(int), | |
1593 | .mode = 0644, | |
6d9f239a | 1594 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1595 | }, |
1596 | { | |
1da177e4 LT |
1597 | .procname = "timeout_synsent", |
1598 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYN_SENT], | |
1599 | .maxlen = sizeof(int), | |
1600 | .mode = 0644, | |
6d9f239a | 1601 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1602 | }, |
1603 | { | |
1da177e4 LT |
1604 | .procname = "timeout_synrecv", |
1605 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYN_RECV], | |
1606 | .maxlen = sizeof(int), | |
1607 | .mode = 0644, | |
6d9f239a | 1608 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1609 | }, |
1610 | { | |
1da177e4 LT |
1611 | .procname = "timeout_finwait", |
1612 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_FIN_WAIT], | |
1613 | .maxlen = sizeof(int), | |
1614 | .mode = 0644, | |
6d9f239a | 1615 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1616 | }, |
1617 | { | |
1da177e4 LT |
1618 | .procname = "timeout_timewait", |
1619 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_TIME_WAIT], | |
1620 | .maxlen = sizeof(int), | |
1621 | .mode = 0644, | |
6d9f239a | 1622 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1623 | }, |
1624 | { | |
1da177e4 LT |
1625 | .procname = "timeout_close", |
1626 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_CLOSE], | |
1627 | .maxlen = sizeof(int), | |
1628 | .mode = 0644, | |
6d9f239a | 1629 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1630 | }, |
1631 | { | |
1da177e4 LT |
1632 | .procname = "timeout_closewait", |
1633 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_CLOSE_WAIT], | |
1634 | .maxlen = sizeof(int), | |
1635 | .mode = 0644, | |
6d9f239a | 1636 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1637 | }, |
1638 | { | |
1da177e4 LT |
1639 | .procname = "timeout_lastack", |
1640 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_LAST_ACK], | |
1641 | .maxlen = sizeof(int), | |
1642 | .mode = 0644, | |
6d9f239a | 1643 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1644 | }, |
1645 | { | |
1da177e4 LT |
1646 | .procname = "timeout_listen", |
1647 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_LISTEN], | |
1648 | .maxlen = sizeof(int), | |
1649 | .mode = 0644, | |
6d9f239a | 1650 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1651 | }, |
1652 | { | |
1da177e4 LT |
1653 | .procname = "timeout_synack", |
1654 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYNACK], | |
1655 | .maxlen = sizeof(int), | |
1656 | .mode = 0644, | |
6d9f239a | 1657 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1658 | }, |
1659 | { | |
1da177e4 LT |
1660 | .procname = "timeout_udp", |
1661 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_UDP], | |
1662 | .maxlen = sizeof(int), | |
1663 | .mode = 0644, | |
6d9f239a | 1664 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1665 | }, |
1666 | { | |
1da177e4 LT |
1667 | .procname = "timeout_icmp", |
1668 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_ICMP], | |
1669 | .maxlen = sizeof(int), | |
1670 | .mode = 0644, | |
6d9f239a | 1671 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1672 | }, |
1673 | #endif | |
1674 | { | |
1da177e4 LT |
1675 | .procname = "cache_bypass", |
1676 | .data = &sysctl_ip_vs_cache_bypass, | |
1677 | .maxlen = sizeof(int), | |
1678 | .mode = 0644, | |
6d9f239a | 1679 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1680 | }, |
1681 | { | |
1da177e4 LT |
1682 | .procname = "expire_nodest_conn", |
1683 | .data = &sysctl_ip_vs_expire_nodest_conn, | |
1684 | .maxlen = sizeof(int), | |
1685 | .mode = 0644, | |
6d9f239a | 1686 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1687 | }, |
1688 | { | |
1da177e4 LT |
1689 | .procname = "expire_quiescent_template", |
1690 | .data = &sysctl_ip_vs_expire_quiescent_template, | |
1691 | .maxlen = sizeof(int), | |
1692 | .mode = 0644, | |
6d9f239a | 1693 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1694 | }, |
1695 | { | |
1da177e4 LT |
1696 | .procname = "sync_threshold", |
1697 | .data = &sysctl_ip_vs_sync_threshold, | |
1698 | .maxlen = sizeof(sysctl_ip_vs_sync_threshold), | |
1699 | .mode = 0644, | |
6d9f239a | 1700 | .proc_handler = proc_do_sync_threshold, |
1da177e4 LT |
1701 | }, |
1702 | { | |
1da177e4 LT |
1703 | .procname = "nat_icmp_send", |
1704 | .data = &sysctl_ip_vs_nat_icmp_send, | |
1705 | .maxlen = sizeof(int), | |
1706 | .mode = 0644, | |
6d9f239a | 1707 | .proc_handler = proc_dointvec, |
1da177e4 | 1708 | }, |
f8572d8f | 1709 | { } |
1da177e4 LT |
1710 | }; |
1711 | ||
5587da55 | 1712 | const struct ctl_path net_vs_ctl_path[] = { |
f8572d8f EB |
1713 | { .procname = "net", }, |
1714 | { .procname = "ipv4", }, | |
90754f8e PE |
1715 | { .procname = "vs", }, |
1716 | { } | |
1da177e4 | 1717 | }; |
90754f8e | 1718 | EXPORT_SYMBOL_GPL(net_vs_ctl_path); |
1da177e4 LT |
1719 | |
1720 | static struct ctl_table_header * sysctl_header; | |
1721 | ||
1722 | #ifdef CONFIG_PROC_FS | |
1723 | ||
1724 | struct ip_vs_iter { | |
1725 | struct list_head *table; | |
1726 | int bucket; | |
1727 | }; | |
1728 | ||
1729 | /* | |
1730 | * Write the contents of the VS rule table to a PROCfs file. | |
1731 | * (It is kept just for backward compatibility) | |
1732 | */ | |
1733 | static inline const char *ip_vs_fwd_name(unsigned flags) | |
1734 | { | |
1735 | switch (flags & IP_VS_CONN_F_FWD_MASK) { | |
1736 | case IP_VS_CONN_F_LOCALNODE: | |
1737 | return "Local"; | |
1738 | case IP_VS_CONN_F_TUNNEL: | |
1739 | return "Tunnel"; | |
1740 | case IP_VS_CONN_F_DROUTE: | |
1741 | return "Route"; | |
1742 | default: | |
1743 | return "Masq"; | |
1744 | } | |
1745 | } | |
1746 | ||
1747 | ||
1748 | /* Get the Nth entry in the two lists */ | |
1749 | static struct ip_vs_service *ip_vs_info_array(struct seq_file *seq, loff_t pos) | |
1750 | { | |
1751 | struct ip_vs_iter *iter = seq->private; | |
1752 | int idx; | |
1753 | struct ip_vs_service *svc; | |
1754 | ||
1755 | /* look in hash by protocol */ | |
1756 | for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
1757 | list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) { | |
1758 | if (pos-- == 0){ | |
1759 | iter->table = ip_vs_svc_table; | |
1760 | iter->bucket = idx; | |
1761 | return svc; | |
1762 | } | |
1763 | } | |
1764 | } | |
1765 | ||
1766 | /* keep looking in fwmark */ | |
1767 | for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
1768 | list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) { | |
1769 | if (pos-- == 0) { | |
1770 | iter->table = ip_vs_svc_fwm_table; | |
1771 | iter->bucket = idx; | |
1772 | return svc; | |
1773 | } | |
1774 | } | |
1775 | } | |
1776 | ||
1777 | return NULL; | |
1778 | } | |
1779 | ||
1780 | static void *ip_vs_info_seq_start(struct seq_file *seq, loff_t *pos) | |
563e94f0 | 1781 | __acquires(__ip_vs_svc_lock) |
1da177e4 LT |
1782 | { |
1783 | ||
1784 | read_lock_bh(&__ip_vs_svc_lock); | |
1785 | return *pos ? ip_vs_info_array(seq, *pos - 1) : SEQ_START_TOKEN; | |
1786 | } | |
1787 | ||
1788 | ||
1789 | static void *ip_vs_info_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1790 | { | |
1791 | struct list_head *e; | |
1792 | struct ip_vs_iter *iter; | |
1793 | struct ip_vs_service *svc; | |
1794 | ||
1795 | ++*pos; | |
1796 | if (v == SEQ_START_TOKEN) | |
1797 | return ip_vs_info_array(seq,0); | |
1798 | ||
1799 | svc = v; | |
1800 | iter = seq->private; | |
1801 | ||
1802 | if (iter->table == ip_vs_svc_table) { | |
1803 | /* next service in table hashed by protocol */ | |
1804 | if ((e = svc->s_list.next) != &ip_vs_svc_table[iter->bucket]) | |
1805 | return list_entry(e, struct ip_vs_service, s_list); | |
1806 | ||
1807 | ||
1808 | while (++iter->bucket < IP_VS_SVC_TAB_SIZE) { | |
1809 | list_for_each_entry(svc,&ip_vs_svc_table[iter->bucket], | |
1810 | s_list) { | |
1811 | return svc; | |
1812 | } | |
1813 | } | |
1814 | ||
1815 | iter->table = ip_vs_svc_fwm_table; | |
1816 | iter->bucket = -1; | |
1817 | goto scan_fwmark; | |
1818 | } | |
1819 | ||
1820 | /* next service in hashed by fwmark */ | |
1821 | if ((e = svc->f_list.next) != &ip_vs_svc_fwm_table[iter->bucket]) | |
1822 | return list_entry(e, struct ip_vs_service, f_list); | |
1823 | ||
1824 | scan_fwmark: | |
1825 | while (++iter->bucket < IP_VS_SVC_TAB_SIZE) { | |
1826 | list_for_each_entry(svc, &ip_vs_svc_fwm_table[iter->bucket], | |
1827 | f_list) | |
1828 | return svc; | |
1829 | } | |
1830 | ||
1831 | return NULL; | |
1832 | } | |
1833 | ||
1834 | static void ip_vs_info_seq_stop(struct seq_file *seq, void *v) | |
563e94f0 | 1835 | __releases(__ip_vs_svc_lock) |
1da177e4 LT |
1836 | { |
1837 | read_unlock_bh(&__ip_vs_svc_lock); | |
1838 | } | |
1839 | ||
1840 | ||
1841 | static int ip_vs_info_seq_show(struct seq_file *seq, void *v) | |
1842 | { | |
1843 | if (v == SEQ_START_TOKEN) { | |
1844 | seq_printf(seq, | |
1845 | "IP Virtual Server version %d.%d.%d (size=%d)\n", | |
6f7edb48 | 1846 | NVERSION(IP_VS_VERSION_CODE), ip_vs_conn_tab_size); |
1da177e4 LT |
1847 | seq_puts(seq, |
1848 | "Prot LocalAddress:Port Scheduler Flags\n"); | |
1849 | seq_puts(seq, | |
1850 | " -> RemoteAddress:Port Forward Weight ActiveConn InActConn\n"); | |
1851 | } else { | |
1852 | const struct ip_vs_service *svc = v; | |
1853 | const struct ip_vs_iter *iter = seq->private; | |
1854 | const struct ip_vs_dest *dest; | |
1855 | ||
667a5f18 VB |
1856 | if (iter->table == ip_vs_svc_table) { |
1857 | #ifdef CONFIG_IP_VS_IPV6 | |
1858 | if (svc->af == AF_INET6) | |
5b095d98 | 1859 | seq_printf(seq, "%s [%pI6]:%04X %s ", |
667a5f18 | 1860 | ip_vs_proto_name(svc->protocol), |
38ff4fa4 | 1861 | &svc->addr.in6, |
667a5f18 VB |
1862 | ntohs(svc->port), |
1863 | svc->scheduler->name); | |
1864 | else | |
1865 | #endif | |
1866 | seq_printf(seq, "%s %08X:%04X %s ", | |
1867 | ip_vs_proto_name(svc->protocol), | |
1868 | ntohl(svc->addr.ip), | |
1869 | ntohs(svc->port), | |
1870 | svc->scheduler->name); | |
1871 | } else { | |
1da177e4 LT |
1872 | seq_printf(seq, "FWM %08X %s ", |
1873 | svc->fwmark, svc->scheduler->name); | |
667a5f18 | 1874 | } |
1da177e4 LT |
1875 | |
1876 | if (svc->flags & IP_VS_SVC_F_PERSISTENT) | |
1877 | seq_printf(seq, "persistent %d %08X\n", | |
1878 | svc->timeout, | |
1879 | ntohl(svc->netmask)); | |
1880 | else | |
1881 | seq_putc(seq, '\n'); | |
1882 | ||
1883 | list_for_each_entry(dest, &svc->destinations, n_list) { | |
667a5f18 VB |
1884 | #ifdef CONFIG_IP_VS_IPV6 |
1885 | if (dest->af == AF_INET6) | |
1886 | seq_printf(seq, | |
5b095d98 | 1887 | " -> [%pI6]:%04X" |
667a5f18 | 1888 | " %-7s %-6d %-10d %-10d\n", |
38ff4fa4 | 1889 | &dest->addr.in6, |
667a5f18 VB |
1890 | ntohs(dest->port), |
1891 | ip_vs_fwd_name(atomic_read(&dest->conn_flags)), | |
1892 | atomic_read(&dest->weight), | |
1893 | atomic_read(&dest->activeconns), | |
1894 | atomic_read(&dest->inactconns)); | |
1895 | else | |
1896 | #endif | |
1897 | seq_printf(seq, | |
1898 | " -> %08X:%04X " | |
1899 | "%-7s %-6d %-10d %-10d\n", | |
1900 | ntohl(dest->addr.ip), | |
1901 | ntohs(dest->port), | |
1902 | ip_vs_fwd_name(atomic_read(&dest->conn_flags)), | |
1903 | atomic_read(&dest->weight), | |
1904 | atomic_read(&dest->activeconns), | |
1905 | atomic_read(&dest->inactconns)); | |
1906 | ||
1da177e4 LT |
1907 | } |
1908 | } | |
1909 | return 0; | |
1910 | } | |
1911 | ||
56b3d975 | 1912 | static const struct seq_operations ip_vs_info_seq_ops = { |
1da177e4 LT |
1913 | .start = ip_vs_info_seq_start, |
1914 | .next = ip_vs_info_seq_next, | |
1915 | .stop = ip_vs_info_seq_stop, | |
1916 | .show = ip_vs_info_seq_show, | |
1917 | }; | |
1918 | ||
1919 | static int ip_vs_info_open(struct inode *inode, struct file *file) | |
1920 | { | |
cf7732e4 PE |
1921 | return seq_open_private(file, &ip_vs_info_seq_ops, |
1922 | sizeof(struct ip_vs_iter)); | |
1da177e4 LT |
1923 | } |
1924 | ||
9a32144e | 1925 | static const struct file_operations ip_vs_info_fops = { |
1da177e4 LT |
1926 | .owner = THIS_MODULE, |
1927 | .open = ip_vs_info_open, | |
1928 | .read = seq_read, | |
1929 | .llseek = seq_lseek, | |
1930 | .release = seq_release_private, | |
1931 | }; | |
1932 | ||
1933 | #endif | |
1934 | ||
519e49e8 SW |
1935 | struct ip_vs_stats ip_vs_stats = { |
1936 | .lock = __SPIN_LOCK_UNLOCKED(ip_vs_stats.lock), | |
1937 | }; | |
1da177e4 LT |
1938 | |
1939 | #ifdef CONFIG_PROC_FS | |
1940 | static int ip_vs_stats_show(struct seq_file *seq, void *v) | |
1941 | { | |
1942 | ||
1943 | /* 01234567 01234567 01234567 0123456701234567 0123456701234567 */ | |
1944 | seq_puts(seq, | |
1945 | " Total Incoming Outgoing Incoming Outgoing\n"); | |
1946 | seq_printf(seq, | |
1947 | " Conns Packets Packets Bytes Bytes\n"); | |
1948 | ||
1949 | spin_lock_bh(&ip_vs_stats.lock); | |
e9c0ce23 SW |
1950 | seq_printf(seq, "%8X %8X %8X %16LX %16LX\n\n", ip_vs_stats.ustats.conns, |
1951 | ip_vs_stats.ustats.inpkts, ip_vs_stats.ustats.outpkts, | |
1952 | (unsigned long long) ip_vs_stats.ustats.inbytes, | |
1953 | (unsigned long long) ip_vs_stats.ustats.outbytes); | |
1da177e4 LT |
1954 | |
1955 | /* 01234567 01234567 01234567 0123456701234567 0123456701234567 */ | |
1956 | seq_puts(seq, | |
1957 | " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n"); | |
1958 | seq_printf(seq,"%8X %8X %8X %16X %16X\n", | |
e9c0ce23 SW |
1959 | ip_vs_stats.ustats.cps, |
1960 | ip_vs_stats.ustats.inpps, | |
1961 | ip_vs_stats.ustats.outpps, | |
1962 | ip_vs_stats.ustats.inbps, | |
1963 | ip_vs_stats.ustats.outbps); | |
1da177e4 LT |
1964 | spin_unlock_bh(&ip_vs_stats.lock); |
1965 | ||
1966 | return 0; | |
1967 | } | |
1968 | ||
1969 | static int ip_vs_stats_seq_open(struct inode *inode, struct file *file) | |
1970 | { | |
1971 | return single_open(file, ip_vs_stats_show, NULL); | |
1972 | } | |
1973 | ||
9a32144e | 1974 | static const struct file_operations ip_vs_stats_fops = { |
1da177e4 LT |
1975 | .owner = THIS_MODULE, |
1976 | .open = ip_vs_stats_seq_open, | |
1977 | .read = seq_read, | |
1978 | .llseek = seq_lseek, | |
1979 | .release = single_release, | |
1980 | }; | |
1981 | ||
1982 | #endif | |
1983 | ||
1984 | /* | |
1985 | * Set timeout values for tcp tcpfin udp in the timeout_table. | |
1986 | */ | |
1987 | static int ip_vs_set_timeout(struct ip_vs_timeout_user *u) | |
1988 | { | |
1989 | IP_VS_DBG(2, "Setting timeout tcp:%d tcpfin:%d udp:%d\n", | |
1990 | u->tcp_timeout, | |
1991 | u->tcp_fin_timeout, | |
1992 | u->udp_timeout); | |
1993 | ||
1994 | #ifdef CONFIG_IP_VS_PROTO_TCP | |
1995 | if (u->tcp_timeout) { | |
1996 | ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_ESTABLISHED] | |
1997 | = u->tcp_timeout * HZ; | |
1998 | } | |
1999 | ||
2000 | if (u->tcp_fin_timeout) { | |
2001 | ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_FIN_WAIT] | |
2002 | = u->tcp_fin_timeout * HZ; | |
2003 | } | |
2004 | #endif | |
2005 | ||
2006 | #ifdef CONFIG_IP_VS_PROTO_UDP | |
2007 | if (u->udp_timeout) { | |
2008 | ip_vs_protocol_udp.timeout_table[IP_VS_UDP_S_NORMAL] | |
2009 | = u->udp_timeout * HZ; | |
2010 | } | |
2011 | #endif | |
2012 | return 0; | |
2013 | } | |
2014 | ||
2015 | ||
2016 | #define SET_CMDID(cmd) (cmd - IP_VS_BASE_CTL) | |
2017 | #define SERVICE_ARG_LEN (sizeof(struct ip_vs_service_user)) | |
2018 | #define SVCDEST_ARG_LEN (sizeof(struct ip_vs_service_user) + \ | |
2019 | sizeof(struct ip_vs_dest_user)) | |
2020 | #define TIMEOUT_ARG_LEN (sizeof(struct ip_vs_timeout_user)) | |
2021 | #define DAEMON_ARG_LEN (sizeof(struct ip_vs_daemon_user)) | |
2022 | #define MAX_ARG_LEN SVCDEST_ARG_LEN | |
2023 | ||
9b5b5cff | 2024 | static const unsigned char set_arglen[SET_CMDID(IP_VS_SO_SET_MAX)+1] = { |
1da177e4 LT |
2025 | [SET_CMDID(IP_VS_SO_SET_ADD)] = SERVICE_ARG_LEN, |
2026 | [SET_CMDID(IP_VS_SO_SET_EDIT)] = SERVICE_ARG_LEN, | |
2027 | [SET_CMDID(IP_VS_SO_SET_DEL)] = SERVICE_ARG_LEN, | |
2028 | [SET_CMDID(IP_VS_SO_SET_FLUSH)] = 0, | |
2029 | [SET_CMDID(IP_VS_SO_SET_ADDDEST)] = SVCDEST_ARG_LEN, | |
2030 | [SET_CMDID(IP_VS_SO_SET_DELDEST)] = SVCDEST_ARG_LEN, | |
2031 | [SET_CMDID(IP_VS_SO_SET_EDITDEST)] = SVCDEST_ARG_LEN, | |
2032 | [SET_CMDID(IP_VS_SO_SET_TIMEOUT)] = TIMEOUT_ARG_LEN, | |
2033 | [SET_CMDID(IP_VS_SO_SET_STARTDAEMON)] = DAEMON_ARG_LEN, | |
2034 | [SET_CMDID(IP_VS_SO_SET_STOPDAEMON)] = DAEMON_ARG_LEN, | |
2035 | [SET_CMDID(IP_VS_SO_SET_ZERO)] = SERVICE_ARG_LEN, | |
2036 | }; | |
2037 | ||
c860c6b1 JV |
2038 | static void ip_vs_copy_usvc_compat(struct ip_vs_service_user_kern *usvc, |
2039 | struct ip_vs_service_user *usvc_compat) | |
2040 | { | |
2041 | usvc->af = AF_INET; | |
2042 | usvc->protocol = usvc_compat->protocol; | |
2043 | usvc->addr.ip = usvc_compat->addr; | |
2044 | usvc->port = usvc_compat->port; | |
2045 | usvc->fwmark = usvc_compat->fwmark; | |
2046 | ||
2047 | /* Deep copy of sched_name is not needed here */ | |
2048 | usvc->sched_name = usvc_compat->sched_name; | |
2049 | ||
2050 | usvc->flags = usvc_compat->flags; | |
2051 | usvc->timeout = usvc_compat->timeout; | |
2052 | usvc->netmask = usvc_compat->netmask; | |
2053 | } | |
2054 | ||
2055 | static void ip_vs_copy_udest_compat(struct ip_vs_dest_user_kern *udest, | |
2056 | struct ip_vs_dest_user *udest_compat) | |
2057 | { | |
2058 | udest->addr.ip = udest_compat->addr; | |
2059 | udest->port = udest_compat->port; | |
2060 | udest->conn_flags = udest_compat->conn_flags; | |
2061 | udest->weight = udest_compat->weight; | |
2062 | udest->u_threshold = udest_compat->u_threshold; | |
2063 | udest->l_threshold = udest_compat->l_threshold; | |
2064 | } | |
2065 | ||
1da177e4 LT |
2066 | static int |
2067 | do_ip_vs_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len) | |
2068 | { | |
2069 | int ret; | |
2070 | unsigned char arg[MAX_ARG_LEN]; | |
c860c6b1 JV |
2071 | struct ip_vs_service_user *usvc_compat; |
2072 | struct ip_vs_service_user_kern usvc; | |
1da177e4 | 2073 | struct ip_vs_service *svc; |
c860c6b1 JV |
2074 | struct ip_vs_dest_user *udest_compat; |
2075 | struct ip_vs_dest_user_kern udest; | |
1da177e4 LT |
2076 | |
2077 | if (!capable(CAP_NET_ADMIN)) | |
2078 | return -EPERM; | |
2079 | ||
04bcef2a AV |
2080 | if (cmd < IP_VS_BASE_CTL || cmd > IP_VS_SO_SET_MAX) |
2081 | return -EINVAL; | |
2082 | if (len < 0 || len > MAX_ARG_LEN) | |
2083 | return -EINVAL; | |
1da177e4 | 2084 | if (len != set_arglen[SET_CMDID(cmd)]) { |
1e3e238e HE |
2085 | pr_err("set_ctl: len %u != %u\n", |
2086 | len, set_arglen[SET_CMDID(cmd)]); | |
1da177e4 LT |
2087 | return -EINVAL; |
2088 | } | |
2089 | ||
2090 | if (copy_from_user(arg, user, len) != 0) | |
2091 | return -EFAULT; | |
2092 | ||
2093 | /* increase the module use count */ | |
2094 | ip_vs_use_count_inc(); | |
2095 | ||
14cc3e2b | 2096 | if (mutex_lock_interruptible(&__ip_vs_mutex)) { |
1da177e4 LT |
2097 | ret = -ERESTARTSYS; |
2098 | goto out_dec; | |
2099 | } | |
2100 | ||
2101 | if (cmd == IP_VS_SO_SET_FLUSH) { | |
2102 | /* Flush the virtual service */ | |
2103 | ret = ip_vs_flush(); | |
2104 | goto out_unlock; | |
2105 | } else if (cmd == IP_VS_SO_SET_TIMEOUT) { | |
2106 | /* Set timeout values for (tcp tcpfin udp) */ | |
2107 | ret = ip_vs_set_timeout((struct ip_vs_timeout_user *)arg); | |
2108 | goto out_unlock; | |
2109 | } else if (cmd == IP_VS_SO_SET_STARTDAEMON) { | |
2110 | struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg; | |
2111 | ret = start_sync_thread(dm->state, dm->mcast_ifn, dm->syncid); | |
2112 | goto out_unlock; | |
2113 | } else if (cmd == IP_VS_SO_SET_STOPDAEMON) { | |
2114 | struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg; | |
2115 | ret = stop_sync_thread(dm->state); | |
2116 | goto out_unlock; | |
2117 | } | |
2118 | ||
c860c6b1 JV |
2119 | usvc_compat = (struct ip_vs_service_user *)arg; |
2120 | udest_compat = (struct ip_vs_dest_user *)(usvc_compat + 1); | |
2121 | ||
2122 | /* We only use the new structs internally, so copy userspace compat | |
2123 | * structs to extended internal versions */ | |
2124 | ip_vs_copy_usvc_compat(&usvc, usvc_compat); | |
2125 | ip_vs_copy_udest_compat(&udest, udest_compat); | |
1da177e4 LT |
2126 | |
2127 | if (cmd == IP_VS_SO_SET_ZERO) { | |
2128 | /* if no service address is set, zero counters in all */ | |
c860c6b1 | 2129 | if (!usvc.fwmark && !usvc.addr.ip && !usvc.port) { |
1da177e4 LT |
2130 | ret = ip_vs_zero_all(); |
2131 | goto out_unlock; | |
2132 | } | |
2133 | } | |
2134 | ||
2135 | /* Check for valid protocol: TCP or UDP, even for fwmark!=0 */ | |
c860c6b1 | 2136 | if (usvc.protocol != IPPROTO_TCP && usvc.protocol != IPPROTO_UDP) { |
1e3e238e HE |
2137 | pr_err("set_ctl: invalid protocol: %d %pI4:%d %s\n", |
2138 | usvc.protocol, &usvc.addr.ip, | |
2139 | ntohs(usvc.port), usvc.sched_name); | |
1da177e4 LT |
2140 | ret = -EFAULT; |
2141 | goto out_unlock; | |
2142 | } | |
2143 | ||
2144 | /* Lookup the exact service by <protocol, addr, port> or fwmark */ | |
c860c6b1 | 2145 | if (usvc.fwmark == 0) |
b18610de JV |
2146 | svc = __ip_vs_service_get(usvc.af, usvc.protocol, |
2147 | &usvc.addr, usvc.port); | |
1da177e4 | 2148 | else |
b18610de | 2149 | svc = __ip_vs_svc_fwm_get(usvc.af, usvc.fwmark); |
1da177e4 LT |
2150 | |
2151 | if (cmd != IP_VS_SO_SET_ADD | |
c860c6b1 | 2152 | && (svc == NULL || svc->protocol != usvc.protocol)) { |
1da177e4 LT |
2153 | ret = -ESRCH; |
2154 | goto out_unlock; | |
2155 | } | |
2156 | ||
2157 | switch (cmd) { | |
2158 | case IP_VS_SO_SET_ADD: | |
2159 | if (svc != NULL) | |
2160 | ret = -EEXIST; | |
2161 | else | |
c860c6b1 | 2162 | ret = ip_vs_add_service(&usvc, &svc); |
1da177e4 LT |
2163 | break; |
2164 | case IP_VS_SO_SET_EDIT: | |
c860c6b1 | 2165 | ret = ip_vs_edit_service(svc, &usvc); |
1da177e4 LT |
2166 | break; |
2167 | case IP_VS_SO_SET_DEL: | |
2168 | ret = ip_vs_del_service(svc); | |
2169 | if (!ret) | |
2170 | goto out_unlock; | |
2171 | break; | |
2172 | case IP_VS_SO_SET_ZERO: | |
2173 | ret = ip_vs_zero_service(svc); | |
2174 | break; | |
2175 | case IP_VS_SO_SET_ADDDEST: | |
c860c6b1 | 2176 | ret = ip_vs_add_dest(svc, &udest); |
1da177e4 LT |
2177 | break; |
2178 | case IP_VS_SO_SET_EDITDEST: | |
c860c6b1 | 2179 | ret = ip_vs_edit_dest(svc, &udest); |
1da177e4 LT |
2180 | break; |
2181 | case IP_VS_SO_SET_DELDEST: | |
c860c6b1 | 2182 | ret = ip_vs_del_dest(svc, &udest); |
1da177e4 LT |
2183 | break; |
2184 | default: | |
2185 | ret = -EINVAL; | |
2186 | } | |
2187 | ||
2188 | if (svc) | |
2189 | ip_vs_service_put(svc); | |
2190 | ||
2191 | out_unlock: | |
14cc3e2b | 2192 | mutex_unlock(&__ip_vs_mutex); |
1da177e4 LT |
2193 | out_dec: |
2194 | /* decrease the module use count */ | |
2195 | ip_vs_use_count_dec(); | |
2196 | ||
2197 | return ret; | |
2198 | } | |
2199 | ||
2200 | ||
2201 | static void | |
2202 | ip_vs_copy_stats(struct ip_vs_stats_user *dst, struct ip_vs_stats *src) | |
2203 | { | |
2204 | spin_lock_bh(&src->lock); | |
e9c0ce23 | 2205 | memcpy(dst, &src->ustats, sizeof(*dst)); |
1da177e4 LT |
2206 | spin_unlock_bh(&src->lock); |
2207 | } | |
2208 | ||
2209 | static void | |
2210 | ip_vs_copy_service(struct ip_vs_service_entry *dst, struct ip_vs_service *src) | |
2211 | { | |
2212 | dst->protocol = src->protocol; | |
e7ade46a | 2213 | dst->addr = src->addr.ip; |
1da177e4 LT |
2214 | dst->port = src->port; |
2215 | dst->fwmark = src->fwmark; | |
4da62fc7 | 2216 | strlcpy(dst->sched_name, src->scheduler->name, sizeof(dst->sched_name)); |
1da177e4 LT |
2217 | dst->flags = src->flags; |
2218 | dst->timeout = src->timeout / HZ; | |
2219 | dst->netmask = src->netmask; | |
2220 | dst->num_dests = src->num_dests; | |
2221 | ip_vs_copy_stats(&dst->stats, &src->stats); | |
2222 | } | |
2223 | ||
2224 | static inline int | |
2225 | __ip_vs_get_service_entries(const struct ip_vs_get_services *get, | |
2226 | struct ip_vs_get_services __user *uptr) | |
2227 | { | |
2228 | int idx, count=0; | |
2229 | struct ip_vs_service *svc; | |
2230 | struct ip_vs_service_entry entry; | |
2231 | int ret = 0; | |
2232 | ||
2233 | for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
2234 | list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) { | |
f94fd041 JV |
2235 | /* Only expose IPv4 entries to old interface */ |
2236 | if (svc->af != AF_INET) | |
2237 | continue; | |
2238 | ||
1da177e4 LT |
2239 | if (count >= get->num_services) |
2240 | goto out; | |
4da62fc7 | 2241 | memset(&entry, 0, sizeof(entry)); |
1da177e4 LT |
2242 | ip_vs_copy_service(&entry, svc); |
2243 | if (copy_to_user(&uptr->entrytable[count], | |
2244 | &entry, sizeof(entry))) { | |
2245 | ret = -EFAULT; | |
2246 | goto out; | |
2247 | } | |
2248 | count++; | |
2249 | } | |
2250 | } | |
2251 | ||
2252 | for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
2253 | list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) { | |
f94fd041 JV |
2254 | /* Only expose IPv4 entries to old interface */ |
2255 | if (svc->af != AF_INET) | |
2256 | continue; | |
2257 | ||
1da177e4 LT |
2258 | if (count >= get->num_services) |
2259 | goto out; | |
4da62fc7 | 2260 | memset(&entry, 0, sizeof(entry)); |
1da177e4 LT |
2261 | ip_vs_copy_service(&entry, svc); |
2262 | if (copy_to_user(&uptr->entrytable[count], | |
2263 | &entry, sizeof(entry))) { | |
2264 | ret = -EFAULT; | |
2265 | goto out; | |
2266 | } | |
2267 | count++; | |
2268 | } | |
2269 | } | |
2270 | out: | |
2271 | return ret; | |
2272 | } | |
2273 | ||
2274 | static inline int | |
2275 | __ip_vs_get_dest_entries(const struct ip_vs_get_dests *get, | |
2276 | struct ip_vs_get_dests __user *uptr) | |
2277 | { | |
2278 | struct ip_vs_service *svc; | |
b18610de | 2279 | union nf_inet_addr addr = { .ip = get->addr }; |
1da177e4 LT |
2280 | int ret = 0; |
2281 | ||
2282 | if (get->fwmark) | |
b18610de | 2283 | svc = __ip_vs_svc_fwm_get(AF_INET, get->fwmark); |
1da177e4 | 2284 | else |
b18610de JV |
2285 | svc = __ip_vs_service_get(AF_INET, get->protocol, &addr, |
2286 | get->port); | |
2287 | ||
1da177e4 LT |
2288 | if (svc) { |
2289 | int count = 0; | |
2290 | struct ip_vs_dest *dest; | |
2291 | struct ip_vs_dest_entry entry; | |
2292 | ||
2293 | list_for_each_entry(dest, &svc->destinations, n_list) { | |
2294 | if (count >= get->num_dests) | |
2295 | break; | |
2296 | ||
e7ade46a | 2297 | entry.addr = dest->addr.ip; |
1da177e4 LT |
2298 | entry.port = dest->port; |
2299 | entry.conn_flags = atomic_read(&dest->conn_flags); | |
2300 | entry.weight = atomic_read(&dest->weight); | |
2301 | entry.u_threshold = dest->u_threshold; | |
2302 | entry.l_threshold = dest->l_threshold; | |
2303 | entry.activeconns = atomic_read(&dest->activeconns); | |
2304 | entry.inactconns = atomic_read(&dest->inactconns); | |
2305 | entry.persistconns = atomic_read(&dest->persistconns); | |
2306 | ip_vs_copy_stats(&entry.stats, &dest->stats); | |
2307 | if (copy_to_user(&uptr->entrytable[count], | |
2308 | &entry, sizeof(entry))) { | |
2309 | ret = -EFAULT; | |
2310 | break; | |
2311 | } | |
2312 | count++; | |
2313 | } | |
2314 | ip_vs_service_put(svc); | |
2315 | } else | |
2316 | ret = -ESRCH; | |
2317 | return ret; | |
2318 | } | |
2319 | ||
2320 | static inline void | |
2321 | __ip_vs_get_timeouts(struct ip_vs_timeout_user *u) | |
2322 | { | |
2323 | #ifdef CONFIG_IP_VS_PROTO_TCP | |
2324 | u->tcp_timeout = | |
2325 | ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_ESTABLISHED] / HZ; | |
2326 | u->tcp_fin_timeout = | |
2327 | ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_FIN_WAIT] / HZ; | |
2328 | #endif | |
2329 | #ifdef CONFIG_IP_VS_PROTO_UDP | |
2330 | u->udp_timeout = | |
2331 | ip_vs_protocol_udp.timeout_table[IP_VS_UDP_S_NORMAL] / HZ; | |
2332 | #endif | |
2333 | } | |
2334 | ||
2335 | ||
2336 | #define GET_CMDID(cmd) (cmd - IP_VS_BASE_CTL) | |
2337 | #define GET_INFO_ARG_LEN (sizeof(struct ip_vs_getinfo)) | |
2338 | #define GET_SERVICES_ARG_LEN (sizeof(struct ip_vs_get_services)) | |
2339 | #define GET_SERVICE_ARG_LEN (sizeof(struct ip_vs_service_entry)) | |
2340 | #define GET_DESTS_ARG_LEN (sizeof(struct ip_vs_get_dests)) | |
2341 | #define GET_TIMEOUT_ARG_LEN (sizeof(struct ip_vs_timeout_user)) | |
2342 | #define GET_DAEMON_ARG_LEN (sizeof(struct ip_vs_daemon_user) * 2) | |
2343 | ||
9b5b5cff | 2344 | static const unsigned char get_arglen[GET_CMDID(IP_VS_SO_GET_MAX)+1] = { |
1da177e4 LT |
2345 | [GET_CMDID(IP_VS_SO_GET_VERSION)] = 64, |
2346 | [GET_CMDID(IP_VS_SO_GET_INFO)] = GET_INFO_ARG_LEN, | |
2347 | [GET_CMDID(IP_VS_SO_GET_SERVICES)] = GET_SERVICES_ARG_LEN, | |
2348 | [GET_CMDID(IP_VS_SO_GET_SERVICE)] = GET_SERVICE_ARG_LEN, | |
2349 | [GET_CMDID(IP_VS_SO_GET_DESTS)] = GET_DESTS_ARG_LEN, | |
2350 | [GET_CMDID(IP_VS_SO_GET_TIMEOUT)] = GET_TIMEOUT_ARG_LEN, | |
2351 | [GET_CMDID(IP_VS_SO_GET_DAEMON)] = GET_DAEMON_ARG_LEN, | |
2352 | }; | |
2353 | ||
2354 | static int | |
2355 | do_ip_vs_get_ctl(struct sock *sk, int cmd, void __user *user, int *len) | |
2356 | { | |
2357 | unsigned char arg[128]; | |
2358 | int ret = 0; | |
04bcef2a | 2359 | unsigned int copylen; |
1da177e4 LT |
2360 | |
2361 | if (!capable(CAP_NET_ADMIN)) | |
2362 | return -EPERM; | |
2363 | ||
04bcef2a AV |
2364 | if (cmd < IP_VS_BASE_CTL || cmd > IP_VS_SO_GET_MAX) |
2365 | return -EINVAL; | |
2366 | ||
1da177e4 | 2367 | if (*len < get_arglen[GET_CMDID(cmd)]) { |
1e3e238e HE |
2368 | pr_err("get_ctl: len %u < %u\n", |
2369 | *len, get_arglen[GET_CMDID(cmd)]); | |
1da177e4 LT |
2370 | return -EINVAL; |
2371 | } | |
2372 | ||
04bcef2a AV |
2373 | copylen = get_arglen[GET_CMDID(cmd)]; |
2374 | if (copylen > 128) | |
2375 | return -EINVAL; | |
2376 | ||
2377 | if (copy_from_user(arg, user, copylen) != 0) | |
1da177e4 LT |
2378 | return -EFAULT; |
2379 | ||
14cc3e2b | 2380 | if (mutex_lock_interruptible(&__ip_vs_mutex)) |
1da177e4 LT |
2381 | return -ERESTARTSYS; |
2382 | ||
2383 | switch (cmd) { | |
2384 | case IP_VS_SO_GET_VERSION: | |
2385 | { | |
2386 | char buf[64]; | |
2387 | ||
2388 | sprintf(buf, "IP Virtual Server version %d.%d.%d (size=%d)", | |
6f7edb48 | 2389 | NVERSION(IP_VS_VERSION_CODE), ip_vs_conn_tab_size); |
1da177e4 LT |
2390 | if (copy_to_user(user, buf, strlen(buf)+1) != 0) { |
2391 | ret = -EFAULT; | |
2392 | goto out; | |
2393 | } | |
2394 | *len = strlen(buf)+1; | |
2395 | } | |
2396 | break; | |
2397 | ||
2398 | case IP_VS_SO_GET_INFO: | |
2399 | { | |
2400 | struct ip_vs_getinfo info; | |
2401 | info.version = IP_VS_VERSION_CODE; | |
6f7edb48 | 2402 | info.size = ip_vs_conn_tab_size; |
1da177e4 LT |
2403 | info.num_services = ip_vs_num_services; |
2404 | if (copy_to_user(user, &info, sizeof(info)) != 0) | |
2405 | ret = -EFAULT; | |
2406 | } | |
2407 | break; | |
2408 | ||
2409 | case IP_VS_SO_GET_SERVICES: | |
2410 | { | |
2411 | struct ip_vs_get_services *get; | |
2412 | int size; | |
2413 | ||
2414 | get = (struct ip_vs_get_services *)arg; | |
2415 | size = sizeof(*get) + | |
2416 | sizeof(struct ip_vs_service_entry) * get->num_services; | |
2417 | if (*len != size) { | |
1e3e238e | 2418 | pr_err("length: %u != %u\n", *len, size); |
1da177e4 LT |
2419 | ret = -EINVAL; |
2420 | goto out; | |
2421 | } | |
2422 | ret = __ip_vs_get_service_entries(get, user); | |
2423 | } | |
2424 | break; | |
2425 | ||
2426 | case IP_VS_SO_GET_SERVICE: | |
2427 | { | |
2428 | struct ip_vs_service_entry *entry; | |
2429 | struct ip_vs_service *svc; | |
b18610de | 2430 | union nf_inet_addr addr; |
1da177e4 LT |
2431 | |
2432 | entry = (struct ip_vs_service_entry *)arg; | |
b18610de | 2433 | addr.ip = entry->addr; |
1da177e4 | 2434 | if (entry->fwmark) |
b18610de | 2435 | svc = __ip_vs_svc_fwm_get(AF_INET, entry->fwmark); |
1da177e4 | 2436 | else |
b18610de JV |
2437 | svc = __ip_vs_service_get(AF_INET, entry->protocol, |
2438 | &addr, entry->port); | |
1da177e4 LT |
2439 | if (svc) { |
2440 | ip_vs_copy_service(entry, svc); | |
2441 | if (copy_to_user(user, entry, sizeof(*entry)) != 0) | |
2442 | ret = -EFAULT; | |
2443 | ip_vs_service_put(svc); | |
2444 | } else | |
2445 | ret = -ESRCH; | |
2446 | } | |
2447 | break; | |
2448 | ||
2449 | case IP_VS_SO_GET_DESTS: | |
2450 | { | |
2451 | struct ip_vs_get_dests *get; | |
2452 | int size; | |
2453 | ||
2454 | get = (struct ip_vs_get_dests *)arg; | |
2455 | size = sizeof(*get) + | |
2456 | sizeof(struct ip_vs_dest_entry) * get->num_dests; | |
2457 | if (*len != size) { | |
1e3e238e | 2458 | pr_err("length: %u != %u\n", *len, size); |
1da177e4 LT |
2459 | ret = -EINVAL; |
2460 | goto out; | |
2461 | } | |
2462 | ret = __ip_vs_get_dest_entries(get, user); | |
2463 | } | |
2464 | break; | |
2465 | ||
2466 | case IP_VS_SO_GET_TIMEOUT: | |
2467 | { | |
2468 | struct ip_vs_timeout_user t; | |
2469 | ||
2470 | __ip_vs_get_timeouts(&t); | |
2471 | if (copy_to_user(user, &t, sizeof(t)) != 0) | |
2472 | ret = -EFAULT; | |
2473 | } | |
2474 | break; | |
2475 | ||
2476 | case IP_VS_SO_GET_DAEMON: | |
2477 | { | |
2478 | struct ip_vs_daemon_user d[2]; | |
2479 | ||
2480 | memset(&d, 0, sizeof(d)); | |
2481 | if (ip_vs_sync_state & IP_VS_STATE_MASTER) { | |
2482 | d[0].state = IP_VS_STATE_MASTER; | |
4da62fc7 | 2483 | strlcpy(d[0].mcast_ifn, ip_vs_master_mcast_ifn, sizeof(d[0].mcast_ifn)); |
1da177e4 LT |
2484 | d[0].syncid = ip_vs_master_syncid; |
2485 | } | |
2486 | if (ip_vs_sync_state & IP_VS_STATE_BACKUP) { | |
2487 | d[1].state = IP_VS_STATE_BACKUP; | |
4da62fc7 | 2488 | strlcpy(d[1].mcast_ifn, ip_vs_backup_mcast_ifn, sizeof(d[1].mcast_ifn)); |
1da177e4 LT |
2489 | d[1].syncid = ip_vs_backup_syncid; |
2490 | } | |
2491 | if (copy_to_user(user, &d, sizeof(d)) != 0) | |
2492 | ret = -EFAULT; | |
2493 | } | |
2494 | break; | |
2495 | ||
2496 | default: | |
2497 | ret = -EINVAL; | |
2498 | } | |
2499 | ||
2500 | out: | |
14cc3e2b | 2501 | mutex_unlock(&__ip_vs_mutex); |
1da177e4 LT |
2502 | return ret; |
2503 | } | |
2504 | ||
2505 | ||
2506 | static struct nf_sockopt_ops ip_vs_sockopts = { | |
2507 | .pf = PF_INET, | |
2508 | .set_optmin = IP_VS_BASE_CTL, | |
2509 | .set_optmax = IP_VS_SO_SET_MAX+1, | |
2510 | .set = do_ip_vs_set_ctl, | |
2511 | .get_optmin = IP_VS_BASE_CTL, | |
2512 | .get_optmax = IP_VS_SO_GET_MAX+1, | |
2513 | .get = do_ip_vs_get_ctl, | |
16fcec35 | 2514 | .owner = THIS_MODULE, |
1da177e4 LT |
2515 | }; |
2516 | ||
9a812198 JV |
2517 | /* |
2518 | * Generic Netlink interface | |
2519 | */ | |
2520 | ||
2521 | /* IPVS genetlink family */ | |
2522 | static struct genl_family ip_vs_genl_family = { | |
2523 | .id = GENL_ID_GENERATE, | |
2524 | .hdrsize = 0, | |
2525 | .name = IPVS_GENL_NAME, | |
2526 | .version = IPVS_GENL_VERSION, | |
2527 | .maxattr = IPVS_CMD_MAX, | |
2528 | }; | |
2529 | ||
2530 | /* Policy used for first-level command attributes */ | |
2531 | static const struct nla_policy ip_vs_cmd_policy[IPVS_CMD_ATTR_MAX + 1] = { | |
2532 | [IPVS_CMD_ATTR_SERVICE] = { .type = NLA_NESTED }, | |
2533 | [IPVS_CMD_ATTR_DEST] = { .type = NLA_NESTED }, | |
2534 | [IPVS_CMD_ATTR_DAEMON] = { .type = NLA_NESTED }, | |
2535 | [IPVS_CMD_ATTR_TIMEOUT_TCP] = { .type = NLA_U32 }, | |
2536 | [IPVS_CMD_ATTR_TIMEOUT_TCP_FIN] = { .type = NLA_U32 }, | |
2537 | [IPVS_CMD_ATTR_TIMEOUT_UDP] = { .type = NLA_U32 }, | |
2538 | }; | |
2539 | ||
2540 | /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DAEMON */ | |
2541 | static const struct nla_policy ip_vs_daemon_policy[IPVS_DAEMON_ATTR_MAX + 1] = { | |
2542 | [IPVS_DAEMON_ATTR_STATE] = { .type = NLA_U32 }, | |
2543 | [IPVS_DAEMON_ATTR_MCAST_IFN] = { .type = NLA_NUL_STRING, | |
2544 | .len = IP_VS_IFNAME_MAXLEN }, | |
2545 | [IPVS_DAEMON_ATTR_SYNC_ID] = { .type = NLA_U32 }, | |
2546 | }; | |
2547 | ||
2548 | /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_SERVICE */ | |
2549 | static const struct nla_policy ip_vs_svc_policy[IPVS_SVC_ATTR_MAX + 1] = { | |
2550 | [IPVS_SVC_ATTR_AF] = { .type = NLA_U16 }, | |
2551 | [IPVS_SVC_ATTR_PROTOCOL] = { .type = NLA_U16 }, | |
2552 | [IPVS_SVC_ATTR_ADDR] = { .type = NLA_BINARY, | |
2553 | .len = sizeof(union nf_inet_addr) }, | |
2554 | [IPVS_SVC_ATTR_PORT] = { .type = NLA_U16 }, | |
2555 | [IPVS_SVC_ATTR_FWMARK] = { .type = NLA_U32 }, | |
2556 | [IPVS_SVC_ATTR_SCHED_NAME] = { .type = NLA_NUL_STRING, | |
2557 | .len = IP_VS_SCHEDNAME_MAXLEN }, | |
2558 | [IPVS_SVC_ATTR_FLAGS] = { .type = NLA_BINARY, | |
2559 | .len = sizeof(struct ip_vs_flags) }, | |
2560 | [IPVS_SVC_ATTR_TIMEOUT] = { .type = NLA_U32 }, | |
2561 | [IPVS_SVC_ATTR_NETMASK] = { .type = NLA_U32 }, | |
2562 | [IPVS_SVC_ATTR_STATS] = { .type = NLA_NESTED }, | |
2563 | }; | |
2564 | ||
2565 | /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DEST */ | |
2566 | static const struct nla_policy ip_vs_dest_policy[IPVS_DEST_ATTR_MAX + 1] = { | |
2567 | [IPVS_DEST_ATTR_ADDR] = { .type = NLA_BINARY, | |
2568 | .len = sizeof(union nf_inet_addr) }, | |
2569 | [IPVS_DEST_ATTR_PORT] = { .type = NLA_U16 }, | |
2570 | [IPVS_DEST_ATTR_FWD_METHOD] = { .type = NLA_U32 }, | |
2571 | [IPVS_DEST_ATTR_WEIGHT] = { .type = NLA_U32 }, | |
2572 | [IPVS_DEST_ATTR_U_THRESH] = { .type = NLA_U32 }, | |
2573 | [IPVS_DEST_ATTR_L_THRESH] = { .type = NLA_U32 }, | |
2574 | [IPVS_DEST_ATTR_ACTIVE_CONNS] = { .type = NLA_U32 }, | |
2575 | [IPVS_DEST_ATTR_INACT_CONNS] = { .type = NLA_U32 }, | |
2576 | [IPVS_DEST_ATTR_PERSIST_CONNS] = { .type = NLA_U32 }, | |
2577 | [IPVS_DEST_ATTR_STATS] = { .type = NLA_NESTED }, | |
2578 | }; | |
2579 | ||
2580 | static int ip_vs_genl_fill_stats(struct sk_buff *skb, int container_type, | |
2581 | struct ip_vs_stats *stats) | |
2582 | { | |
2583 | struct nlattr *nl_stats = nla_nest_start(skb, container_type); | |
2584 | if (!nl_stats) | |
2585 | return -EMSGSIZE; | |
2586 | ||
2587 | spin_lock_bh(&stats->lock); | |
2588 | ||
e9c0ce23 SW |
2589 | NLA_PUT_U32(skb, IPVS_STATS_ATTR_CONNS, stats->ustats.conns); |
2590 | NLA_PUT_U32(skb, IPVS_STATS_ATTR_INPKTS, stats->ustats.inpkts); | |
2591 | NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTPKTS, stats->ustats.outpkts); | |
2592 | NLA_PUT_U64(skb, IPVS_STATS_ATTR_INBYTES, stats->ustats.inbytes); | |
2593 | NLA_PUT_U64(skb, IPVS_STATS_ATTR_OUTBYTES, stats->ustats.outbytes); | |
2594 | NLA_PUT_U32(skb, IPVS_STATS_ATTR_CPS, stats->ustats.cps); | |
2595 | NLA_PUT_U32(skb, IPVS_STATS_ATTR_INPPS, stats->ustats.inpps); | |
2596 | NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTPPS, stats->ustats.outpps); | |
2597 | NLA_PUT_U32(skb, IPVS_STATS_ATTR_INBPS, stats->ustats.inbps); | |
2598 | NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTBPS, stats->ustats.outbps); | |
9a812198 JV |
2599 | |
2600 | spin_unlock_bh(&stats->lock); | |
2601 | ||
2602 | nla_nest_end(skb, nl_stats); | |
2603 | ||
2604 | return 0; | |
2605 | ||
2606 | nla_put_failure: | |
2607 | spin_unlock_bh(&stats->lock); | |
2608 | nla_nest_cancel(skb, nl_stats); | |
2609 | return -EMSGSIZE; | |
2610 | } | |
2611 | ||
2612 | static int ip_vs_genl_fill_service(struct sk_buff *skb, | |
2613 | struct ip_vs_service *svc) | |
2614 | { | |
2615 | struct nlattr *nl_service; | |
2616 | struct ip_vs_flags flags = { .flags = svc->flags, | |
2617 | .mask = ~0 }; | |
2618 | ||
2619 | nl_service = nla_nest_start(skb, IPVS_CMD_ATTR_SERVICE); | |
2620 | if (!nl_service) | |
2621 | return -EMSGSIZE; | |
2622 | ||
f94fd041 | 2623 | NLA_PUT_U16(skb, IPVS_SVC_ATTR_AF, svc->af); |
9a812198 JV |
2624 | |
2625 | if (svc->fwmark) { | |
2626 | NLA_PUT_U32(skb, IPVS_SVC_ATTR_FWMARK, svc->fwmark); | |
2627 | } else { | |
2628 | NLA_PUT_U16(skb, IPVS_SVC_ATTR_PROTOCOL, svc->protocol); | |
2629 | NLA_PUT(skb, IPVS_SVC_ATTR_ADDR, sizeof(svc->addr), &svc->addr); | |
2630 | NLA_PUT_U16(skb, IPVS_SVC_ATTR_PORT, svc->port); | |
2631 | } | |
2632 | ||
2633 | NLA_PUT_STRING(skb, IPVS_SVC_ATTR_SCHED_NAME, svc->scheduler->name); | |
2634 | NLA_PUT(skb, IPVS_SVC_ATTR_FLAGS, sizeof(flags), &flags); | |
2635 | NLA_PUT_U32(skb, IPVS_SVC_ATTR_TIMEOUT, svc->timeout / HZ); | |
2636 | NLA_PUT_U32(skb, IPVS_SVC_ATTR_NETMASK, svc->netmask); | |
2637 | ||
2638 | if (ip_vs_genl_fill_stats(skb, IPVS_SVC_ATTR_STATS, &svc->stats)) | |
2639 | goto nla_put_failure; | |
2640 | ||
2641 | nla_nest_end(skb, nl_service); | |
2642 | ||
2643 | return 0; | |
2644 | ||
2645 | nla_put_failure: | |
2646 | nla_nest_cancel(skb, nl_service); | |
2647 | return -EMSGSIZE; | |
2648 | } | |
2649 | ||
2650 | static int ip_vs_genl_dump_service(struct sk_buff *skb, | |
2651 | struct ip_vs_service *svc, | |
2652 | struct netlink_callback *cb) | |
2653 | { | |
2654 | void *hdr; | |
2655 | ||
2656 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq, | |
2657 | &ip_vs_genl_family, NLM_F_MULTI, | |
2658 | IPVS_CMD_NEW_SERVICE); | |
2659 | if (!hdr) | |
2660 | return -EMSGSIZE; | |
2661 | ||
2662 | if (ip_vs_genl_fill_service(skb, svc) < 0) | |
2663 | goto nla_put_failure; | |
2664 | ||
2665 | return genlmsg_end(skb, hdr); | |
2666 | ||
2667 | nla_put_failure: | |
2668 | genlmsg_cancel(skb, hdr); | |
2669 | return -EMSGSIZE; | |
2670 | } | |
2671 | ||
2672 | static int ip_vs_genl_dump_services(struct sk_buff *skb, | |
2673 | struct netlink_callback *cb) | |
2674 | { | |
2675 | int idx = 0, i; | |
2676 | int start = cb->args[0]; | |
2677 | struct ip_vs_service *svc; | |
2678 | ||
2679 | mutex_lock(&__ip_vs_mutex); | |
2680 | for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) { | |
2681 | list_for_each_entry(svc, &ip_vs_svc_table[i], s_list) { | |
2682 | if (++idx <= start) | |
2683 | continue; | |
2684 | if (ip_vs_genl_dump_service(skb, svc, cb) < 0) { | |
2685 | idx--; | |
2686 | goto nla_put_failure; | |
2687 | } | |
2688 | } | |
2689 | } | |
2690 | ||
2691 | for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) { | |
2692 | list_for_each_entry(svc, &ip_vs_svc_fwm_table[i], f_list) { | |
2693 | if (++idx <= start) | |
2694 | continue; | |
2695 | if (ip_vs_genl_dump_service(skb, svc, cb) < 0) { | |
2696 | idx--; | |
2697 | goto nla_put_failure; | |
2698 | } | |
2699 | } | |
2700 | } | |
2701 | ||
2702 | nla_put_failure: | |
2703 | mutex_unlock(&__ip_vs_mutex); | |
2704 | cb->args[0] = idx; | |
2705 | ||
2706 | return skb->len; | |
2707 | } | |
2708 | ||
c860c6b1 | 2709 | static int ip_vs_genl_parse_service(struct ip_vs_service_user_kern *usvc, |
9a812198 JV |
2710 | struct nlattr *nla, int full_entry) |
2711 | { | |
2712 | struct nlattr *attrs[IPVS_SVC_ATTR_MAX + 1]; | |
2713 | struct nlattr *nla_af, *nla_port, *nla_fwmark, *nla_protocol, *nla_addr; | |
2714 | ||
2715 | /* Parse mandatory identifying service fields first */ | |
2716 | if (nla == NULL || | |
2717 | nla_parse_nested(attrs, IPVS_SVC_ATTR_MAX, nla, ip_vs_svc_policy)) | |
2718 | return -EINVAL; | |
2719 | ||
2720 | nla_af = attrs[IPVS_SVC_ATTR_AF]; | |
2721 | nla_protocol = attrs[IPVS_SVC_ATTR_PROTOCOL]; | |
2722 | nla_addr = attrs[IPVS_SVC_ATTR_ADDR]; | |
2723 | nla_port = attrs[IPVS_SVC_ATTR_PORT]; | |
2724 | nla_fwmark = attrs[IPVS_SVC_ATTR_FWMARK]; | |
2725 | ||
2726 | if (!(nla_af && (nla_fwmark || (nla_port && nla_protocol && nla_addr)))) | |
2727 | return -EINVAL; | |
2728 | ||
258c8893 SH |
2729 | memset(usvc, 0, sizeof(*usvc)); |
2730 | ||
c860c6b1 | 2731 | usvc->af = nla_get_u16(nla_af); |
f94fd041 JV |
2732 | #ifdef CONFIG_IP_VS_IPV6 |
2733 | if (usvc->af != AF_INET && usvc->af != AF_INET6) | |
2734 | #else | |
2735 | if (usvc->af != AF_INET) | |
2736 | #endif | |
9a812198 JV |
2737 | return -EAFNOSUPPORT; |
2738 | ||
2739 | if (nla_fwmark) { | |
2740 | usvc->protocol = IPPROTO_TCP; | |
2741 | usvc->fwmark = nla_get_u32(nla_fwmark); | |
2742 | } else { | |
2743 | usvc->protocol = nla_get_u16(nla_protocol); | |
2744 | nla_memcpy(&usvc->addr, nla_addr, sizeof(usvc->addr)); | |
2745 | usvc->port = nla_get_u16(nla_port); | |
2746 | usvc->fwmark = 0; | |
2747 | } | |
2748 | ||
2749 | /* If a full entry was requested, check for the additional fields */ | |
2750 | if (full_entry) { | |
2751 | struct nlattr *nla_sched, *nla_flags, *nla_timeout, | |
2752 | *nla_netmask; | |
2753 | struct ip_vs_flags flags; | |
2754 | struct ip_vs_service *svc; | |
2755 | ||
2756 | nla_sched = attrs[IPVS_SVC_ATTR_SCHED_NAME]; | |
2757 | nla_flags = attrs[IPVS_SVC_ATTR_FLAGS]; | |
2758 | nla_timeout = attrs[IPVS_SVC_ATTR_TIMEOUT]; | |
2759 | nla_netmask = attrs[IPVS_SVC_ATTR_NETMASK]; | |
2760 | ||
2761 | if (!(nla_sched && nla_flags && nla_timeout && nla_netmask)) | |
2762 | return -EINVAL; | |
2763 | ||
2764 | nla_memcpy(&flags, nla_flags, sizeof(flags)); | |
2765 | ||
2766 | /* prefill flags from service if it already exists */ | |
2767 | if (usvc->fwmark) | |
b18610de | 2768 | svc = __ip_vs_svc_fwm_get(usvc->af, usvc->fwmark); |
9a812198 | 2769 | else |
b18610de JV |
2770 | svc = __ip_vs_service_get(usvc->af, usvc->protocol, |
2771 | &usvc->addr, usvc->port); | |
9a812198 JV |
2772 | if (svc) { |
2773 | usvc->flags = svc->flags; | |
2774 | ip_vs_service_put(svc); | |
2775 | } else | |
2776 | usvc->flags = 0; | |
2777 | ||
2778 | /* set new flags from userland */ | |
2779 | usvc->flags = (usvc->flags & ~flags.mask) | | |
2780 | (flags.flags & flags.mask); | |
c860c6b1 | 2781 | usvc->sched_name = nla_data(nla_sched); |
9a812198 JV |
2782 | usvc->timeout = nla_get_u32(nla_timeout); |
2783 | usvc->netmask = nla_get_u32(nla_netmask); | |
2784 | } | |
2785 | ||
2786 | return 0; | |
2787 | } | |
2788 | ||
2789 | static struct ip_vs_service *ip_vs_genl_find_service(struct nlattr *nla) | |
2790 | { | |
c860c6b1 | 2791 | struct ip_vs_service_user_kern usvc; |
9a812198 JV |
2792 | int ret; |
2793 | ||
2794 | ret = ip_vs_genl_parse_service(&usvc, nla, 0); | |
2795 | if (ret) | |
2796 | return ERR_PTR(ret); | |
2797 | ||
2798 | if (usvc.fwmark) | |
b18610de | 2799 | return __ip_vs_svc_fwm_get(usvc.af, usvc.fwmark); |
9a812198 | 2800 | else |
b18610de JV |
2801 | return __ip_vs_service_get(usvc.af, usvc.protocol, |
2802 | &usvc.addr, usvc.port); | |
9a812198 JV |
2803 | } |
2804 | ||
2805 | static int ip_vs_genl_fill_dest(struct sk_buff *skb, struct ip_vs_dest *dest) | |
2806 | { | |
2807 | struct nlattr *nl_dest; | |
2808 | ||
2809 | nl_dest = nla_nest_start(skb, IPVS_CMD_ATTR_DEST); | |
2810 | if (!nl_dest) | |
2811 | return -EMSGSIZE; | |
2812 | ||
2813 | NLA_PUT(skb, IPVS_DEST_ATTR_ADDR, sizeof(dest->addr), &dest->addr); | |
2814 | NLA_PUT_U16(skb, IPVS_DEST_ATTR_PORT, dest->port); | |
2815 | ||
2816 | NLA_PUT_U32(skb, IPVS_DEST_ATTR_FWD_METHOD, | |
2817 | atomic_read(&dest->conn_flags) & IP_VS_CONN_F_FWD_MASK); | |
2818 | NLA_PUT_U32(skb, IPVS_DEST_ATTR_WEIGHT, atomic_read(&dest->weight)); | |
2819 | NLA_PUT_U32(skb, IPVS_DEST_ATTR_U_THRESH, dest->u_threshold); | |
2820 | NLA_PUT_U32(skb, IPVS_DEST_ATTR_L_THRESH, dest->l_threshold); | |
2821 | NLA_PUT_U32(skb, IPVS_DEST_ATTR_ACTIVE_CONNS, | |
2822 | atomic_read(&dest->activeconns)); | |
2823 | NLA_PUT_U32(skb, IPVS_DEST_ATTR_INACT_CONNS, | |
2824 | atomic_read(&dest->inactconns)); | |
2825 | NLA_PUT_U32(skb, IPVS_DEST_ATTR_PERSIST_CONNS, | |
2826 | atomic_read(&dest->persistconns)); | |
2827 | ||
2828 | if (ip_vs_genl_fill_stats(skb, IPVS_DEST_ATTR_STATS, &dest->stats)) | |
2829 | goto nla_put_failure; | |
2830 | ||
2831 | nla_nest_end(skb, nl_dest); | |
2832 | ||
2833 | return 0; | |
2834 | ||
2835 | nla_put_failure: | |
2836 | nla_nest_cancel(skb, nl_dest); | |
2837 | return -EMSGSIZE; | |
2838 | } | |
2839 | ||
2840 | static int ip_vs_genl_dump_dest(struct sk_buff *skb, struct ip_vs_dest *dest, | |
2841 | struct netlink_callback *cb) | |
2842 | { | |
2843 | void *hdr; | |
2844 | ||
2845 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq, | |
2846 | &ip_vs_genl_family, NLM_F_MULTI, | |
2847 | IPVS_CMD_NEW_DEST); | |
2848 | if (!hdr) | |
2849 | return -EMSGSIZE; | |
2850 | ||
2851 | if (ip_vs_genl_fill_dest(skb, dest) < 0) | |
2852 | goto nla_put_failure; | |
2853 | ||
2854 | return genlmsg_end(skb, hdr); | |
2855 | ||
2856 | nla_put_failure: | |
2857 | genlmsg_cancel(skb, hdr); | |
2858 | return -EMSGSIZE; | |
2859 | } | |
2860 | ||
2861 | static int ip_vs_genl_dump_dests(struct sk_buff *skb, | |
2862 | struct netlink_callback *cb) | |
2863 | { | |
2864 | int idx = 0; | |
2865 | int start = cb->args[0]; | |
2866 | struct ip_vs_service *svc; | |
2867 | struct ip_vs_dest *dest; | |
2868 | struct nlattr *attrs[IPVS_CMD_ATTR_MAX + 1]; | |
2869 | ||
2870 | mutex_lock(&__ip_vs_mutex); | |
2871 | ||
2872 | /* Try to find the service for which to dump destinations */ | |
2873 | if (nlmsg_parse(cb->nlh, GENL_HDRLEN, attrs, | |
2874 | IPVS_CMD_ATTR_MAX, ip_vs_cmd_policy)) | |
2875 | goto out_err; | |
2876 | ||
2877 | svc = ip_vs_genl_find_service(attrs[IPVS_CMD_ATTR_SERVICE]); | |
2878 | if (IS_ERR(svc) || svc == NULL) | |
2879 | goto out_err; | |
2880 | ||
2881 | /* Dump the destinations */ | |
2882 | list_for_each_entry(dest, &svc->destinations, n_list) { | |
2883 | if (++idx <= start) | |
2884 | continue; | |
2885 | if (ip_vs_genl_dump_dest(skb, dest, cb) < 0) { | |
2886 | idx--; | |
2887 | goto nla_put_failure; | |
2888 | } | |
2889 | } | |
2890 | ||
2891 | nla_put_failure: | |
2892 | cb->args[0] = idx; | |
2893 | ip_vs_service_put(svc); | |
2894 | ||
2895 | out_err: | |
2896 | mutex_unlock(&__ip_vs_mutex); | |
2897 | ||
2898 | return skb->len; | |
2899 | } | |
2900 | ||
c860c6b1 | 2901 | static int ip_vs_genl_parse_dest(struct ip_vs_dest_user_kern *udest, |
9a812198 JV |
2902 | struct nlattr *nla, int full_entry) |
2903 | { | |
2904 | struct nlattr *attrs[IPVS_DEST_ATTR_MAX + 1]; | |
2905 | struct nlattr *nla_addr, *nla_port; | |
2906 | ||
2907 | /* Parse mandatory identifying destination fields first */ | |
2908 | if (nla == NULL || | |
2909 | nla_parse_nested(attrs, IPVS_DEST_ATTR_MAX, nla, ip_vs_dest_policy)) | |
2910 | return -EINVAL; | |
2911 | ||
2912 | nla_addr = attrs[IPVS_DEST_ATTR_ADDR]; | |
2913 | nla_port = attrs[IPVS_DEST_ATTR_PORT]; | |
2914 | ||
2915 | if (!(nla_addr && nla_port)) | |
2916 | return -EINVAL; | |
2917 | ||
258c8893 SH |
2918 | memset(udest, 0, sizeof(*udest)); |
2919 | ||
9a812198 JV |
2920 | nla_memcpy(&udest->addr, nla_addr, sizeof(udest->addr)); |
2921 | udest->port = nla_get_u16(nla_port); | |
2922 | ||
2923 | /* If a full entry was requested, check for the additional fields */ | |
2924 | if (full_entry) { | |
2925 | struct nlattr *nla_fwd, *nla_weight, *nla_u_thresh, | |
2926 | *nla_l_thresh; | |
2927 | ||
2928 | nla_fwd = attrs[IPVS_DEST_ATTR_FWD_METHOD]; | |
2929 | nla_weight = attrs[IPVS_DEST_ATTR_WEIGHT]; | |
2930 | nla_u_thresh = attrs[IPVS_DEST_ATTR_U_THRESH]; | |
2931 | nla_l_thresh = attrs[IPVS_DEST_ATTR_L_THRESH]; | |
2932 | ||
2933 | if (!(nla_fwd && nla_weight && nla_u_thresh && nla_l_thresh)) | |
2934 | return -EINVAL; | |
2935 | ||
2936 | udest->conn_flags = nla_get_u32(nla_fwd) | |
2937 | & IP_VS_CONN_F_FWD_MASK; | |
2938 | udest->weight = nla_get_u32(nla_weight); | |
2939 | udest->u_threshold = nla_get_u32(nla_u_thresh); | |
2940 | udest->l_threshold = nla_get_u32(nla_l_thresh); | |
2941 | } | |
2942 | ||
2943 | return 0; | |
2944 | } | |
2945 | ||
2946 | static int ip_vs_genl_fill_daemon(struct sk_buff *skb, __be32 state, | |
2947 | const char *mcast_ifn, __be32 syncid) | |
2948 | { | |
2949 | struct nlattr *nl_daemon; | |
2950 | ||
2951 | nl_daemon = nla_nest_start(skb, IPVS_CMD_ATTR_DAEMON); | |
2952 | if (!nl_daemon) | |
2953 | return -EMSGSIZE; | |
2954 | ||
2955 | NLA_PUT_U32(skb, IPVS_DAEMON_ATTR_STATE, state); | |
2956 | NLA_PUT_STRING(skb, IPVS_DAEMON_ATTR_MCAST_IFN, mcast_ifn); | |
2957 | NLA_PUT_U32(skb, IPVS_DAEMON_ATTR_SYNC_ID, syncid); | |
2958 | ||
2959 | nla_nest_end(skb, nl_daemon); | |
2960 | ||
2961 | return 0; | |
2962 | ||
2963 | nla_put_failure: | |
2964 | nla_nest_cancel(skb, nl_daemon); | |
2965 | return -EMSGSIZE; | |
2966 | } | |
2967 | ||
2968 | static int ip_vs_genl_dump_daemon(struct sk_buff *skb, __be32 state, | |
2969 | const char *mcast_ifn, __be32 syncid, | |
2970 | struct netlink_callback *cb) | |
2971 | { | |
2972 | void *hdr; | |
2973 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq, | |
2974 | &ip_vs_genl_family, NLM_F_MULTI, | |
2975 | IPVS_CMD_NEW_DAEMON); | |
2976 | if (!hdr) | |
2977 | return -EMSGSIZE; | |
2978 | ||
2979 | if (ip_vs_genl_fill_daemon(skb, state, mcast_ifn, syncid)) | |
2980 | goto nla_put_failure; | |
2981 | ||
2982 | return genlmsg_end(skb, hdr); | |
2983 | ||
2984 | nla_put_failure: | |
2985 | genlmsg_cancel(skb, hdr); | |
2986 | return -EMSGSIZE; | |
2987 | } | |
2988 | ||
2989 | static int ip_vs_genl_dump_daemons(struct sk_buff *skb, | |
2990 | struct netlink_callback *cb) | |
2991 | { | |
2992 | mutex_lock(&__ip_vs_mutex); | |
2993 | if ((ip_vs_sync_state & IP_VS_STATE_MASTER) && !cb->args[0]) { | |
2994 | if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_MASTER, | |
2995 | ip_vs_master_mcast_ifn, | |
2996 | ip_vs_master_syncid, cb) < 0) | |
2997 | goto nla_put_failure; | |
2998 | ||
2999 | cb->args[0] = 1; | |
3000 | } | |
3001 | ||
3002 | if ((ip_vs_sync_state & IP_VS_STATE_BACKUP) && !cb->args[1]) { | |
3003 | if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_BACKUP, | |
3004 | ip_vs_backup_mcast_ifn, | |
3005 | ip_vs_backup_syncid, cb) < 0) | |
3006 | goto nla_put_failure; | |
3007 | ||
3008 | cb->args[1] = 1; | |
3009 | } | |
3010 | ||
3011 | nla_put_failure: | |
3012 | mutex_unlock(&__ip_vs_mutex); | |
3013 | ||
3014 | return skb->len; | |
3015 | } | |
3016 | ||
3017 | static int ip_vs_genl_new_daemon(struct nlattr **attrs) | |
3018 | { | |
3019 | if (!(attrs[IPVS_DAEMON_ATTR_STATE] && | |
3020 | attrs[IPVS_DAEMON_ATTR_MCAST_IFN] && | |
3021 | attrs[IPVS_DAEMON_ATTR_SYNC_ID])) | |
3022 | return -EINVAL; | |
3023 | ||
3024 | return start_sync_thread(nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]), | |
3025 | nla_data(attrs[IPVS_DAEMON_ATTR_MCAST_IFN]), | |
3026 | nla_get_u32(attrs[IPVS_DAEMON_ATTR_SYNC_ID])); | |
3027 | } | |
3028 | ||
3029 | static int ip_vs_genl_del_daemon(struct nlattr **attrs) | |
3030 | { | |
3031 | if (!attrs[IPVS_DAEMON_ATTR_STATE]) | |
3032 | return -EINVAL; | |
3033 | ||
3034 | return stop_sync_thread(nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE])); | |
3035 | } | |
3036 | ||
3037 | static int ip_vs_genl_set_config(struct nlattr **attrs) | |
3038 | { | |
3039 | struct ip_vs_timeout_user t; | |
3040 | ||
3041 | __ip_vs_get_timeouts(&t); | |
3042 | ||
3043 | if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP]) | |
3044 | t.tcp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP]); | |
3045 | ||
3046 | if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN]) | |
3047 | t.tcp_fin_timeout = | |
3048 | nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN]); | |
3049 | ||
3050 | if (attrs[IPVS_CMD_ATTR_TIMEOUT_UDP]) | |
3051 | t.udp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_UDP]); | |
3052 | ||
3053 | return ip_vs_set_timeout(&t); | |
3054 | } | |
3055 | ||
3056 | static int ip_vs_genl_set_cmd(struct sk_buff *skb, struct genl_info *info) | |
3057 | { | |
3058 | struct ip_vs_service *svc = NULL; | |
c860c6b1 JV |
3059 | struct ip_vs_service_user_kern usvc; |
3060 | struct ip_vs_dest_user_kern udest; | |
9a812198 JV |
3061 | int ret = 0, cmd; |
3062 | int need_full_svc = 0, need_full_dest = 0; | |
3063 | ||
3064 | cmd = info->genlhdr->cmd; | |
3065 | ||
3066 | mutex_lock(&__ip_vs_mutex); | |
3067 | ||
3068 | if (cmd == IPVS_CMD_FLUSH) { | |
3069 | ret = ip_vs_flush(); | |
3070 | goto out; | |
3071 | } else if (cmd == IPVS_CMD_SET_CONFIG) { | |
3072 | ret = ip_vs_genl_set_config(info->attrs); | |
3073 | goto out; | |
3074 | } else if (cmd == IPVS_CMD_NEW_DAEMON || | |
3075 | cmd == IPVS_CMD_DEL_DAEMON) { | |
3076 | ||
3077 | struct nlattr *daemon_attrs[IPVS_DAEMON_ATTR_MAX + 1]; | |
3078 | ||
3079 | if (!info->attrs[IPVS_CMD_ATTR_DAEMON] || | |
3080 | nla_parse_nested(daemon_attrs, IPVS_DAEMON_ATTR_MAX, | |
3081 | info->attrs[IPVS_CMD_ATTR_DAEMON], | |
3082 | ip_vs_daemon_policy)) { | |
3083 | ret = -EINVAL; | |
3084 | goto out; | |
3085 | } | |
3086 | ||
3087 | if (cmd == IPVS_CMD_NEW_DAEMON) | |
3088 | ret = ip_vs_genl_new_daemon(daemon_attrs); | |
3089 | else | |
3090 | ret = ip_vs_genl_del_daemon(daemon_attrs); | |
3091 | goto out; | |
3092 | } else if (cmd == IPVS_CMD_ZERO && | |
3093 | !info->attrs[IPVS_CMD_ATTR_SERVICE]) { | |
3094 | ret = ip_vs_zero_all(); | |
3095 | goto out; | |
3096 | } | |
3097 | ||
3098 | /* All following commands require a service argument, so check if we | |
3099 | * received a valid one. We need a full service specification when | |
3100 | * adding / editing a service. Only identifying members otherwise. */ | |
3101 | if (cmd == IPVS_CMD_NEW_SERVICE || cmd == IPVS_CMD_SET_SERVICE) | |
3102 | need_full_svc = 1; | |
3103 | ||
3104 | ret = ip_vs_genl_parse_service(&usvc, | |
3105 | info->attrs[IPVS_CMD_ATTR_SERVICE], | |
3106 | need_full_svc); | |
3107 | if (ret) | |
3108 | goto out; | |
3109 | ||
3110 | /* Lookup the exact service by <protocol, addr, port> or fwmark */ | |
3111 | if (usvc.fwmark == 0) | |
b18610de JV |
3112 | svc = __ip_vs_service_get(usvc.af, usvc.protocol, |
3113 | &usvc.addr, usvc.port); | |
9a812198 | 3114 | else |
b18610de | 3115 | svc = __ip_vs_svc_fwm_get(usvc.af, usvc.fwmark); |
9a812198 JV |
3116 | |
3117 | /* Unless we're adding a new service, the service must already exist */ | |
3118 | if ((cmd != IPVS_CMD_NEW_SERVICE) && (svc == NULL)) { | |
3119 | ret = -ESRCH; | |
3120 | goto out; | |
3121 | } | |
3122 | ||
3123 | /* Destination commands require a valid destination argument. For | |
3124 | * adding / editing a destination, we need a full destination | |
3125 | * specification. */ | |
3126 | if (cmd == IPVS_CMD_NEW_DEST || cmd == IPVS_CMD_SET_DEST || | |
3127 | cmd == IPVS_CMD_DEL_DEST) { | |
3128 | if (cmd != IPVS_CMD_DEL_DEST) | |
3129 | need_full_dest = 1; | |
3130 | ||
3131 | ret = ip_vs_genl_parse_dest(&udest, | |
3132 | info->attrs[IPVS_CMD_ATTR_DEST], | |
3133 | need_full_dest); | |
3134 | if (ret) | |
3135 | goto out; | |
3136 | } | |
3137 | ||
3138 | switch (cmd) { | |
3139 | case IPVS_CMD_NEW_SERVICE: | |
3140 | if (svc == NULL) | |
3141 | ret = ip_vs_add_service(&usvc, &svc); | |
3142 | else | |
3143 | ret = -EEXIST; | |
3144 | break; | |
3145 | case IPVS_CMD_SET_SERVICE: | |
3146 | ret = ip_vs_edit_service(svc, &usvc); | |
3147 | break; | |
3148 | case IPVS_CMD_DEL_SERVICE: | |
3149 | ret = ip_vs_del_service(svc); | |
3150 | break; | |
3151 | case IPVS_CMD_NEW_DEST: | |
3152 | ret = ip_vs_add_dest(svc, &udest); | |
3153 | break; | |
3154 | case IPVS_CMD_SET_DEST: | |
3155 | ret = ip_vs_edit_dest(svc, &udest); | |
3156 | break; | |
3157 | case IPVS_CMD_DEL_DEST: | |
3158 | ret = ip_vs_del_dest(svc, &udest); | |
3159 | break; | |
3160 | case IPVS_CMD_ZERO: | |
3161 | ret = ip_vs_zero_service(svc); | |
3162 | break; | |
3163 | default: | |
3164 | ret = -EINVAL; | |
3165 | } | |
3166 | ||
3167 | out: | |
3168 | if (svc) | |
3169 | ip_vs_service_put(svc); | |
3170 | mutex_unlock(&__ip_vs_mutex); | |
3171 | ||
3172 | return ret; | |
3173 | } | |
3174 | ||
3175 | static int ip_vs_genl_get_cmd(struct sk_buff *skb, struct genl_info *info) | |
3176 | { | |
3177 | struct sk_buff *msg; | |
3178 | void *reply; | |
3179 | int ret, cmd, reply_cmd; | |
3180 | ||
3181 | cmd = info->genlhdr->cmd; | |
3182 | ||
3183 | if (cmd == IPVS_CMD_GET_SERVICE) | |
3184 | reply_cmd = IPVS_CMD_NEW_SERVICE; | |
3185 | else if (cmd == IPVS_CMD_GET_INFO) | |
3186 | reply_cmd = IPVS_CMD_SET_INFO; | |
3187 | else if (cmd == IPVS_CMD_GET_CONFIG) | |
3188 | reply_cmd = IPVS_CMD_SET_CONFIG; | |
3189 | else { | |
1e3e238e | 3190 | pr_err("unknown Generic Netlink command\n"); |
9a812198 JV |
3191 | return -EINVAL; |
3192 | } | |
3193 | ||
3194 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
3195 | if (!msg) | |
3196 | return -ENOMEM; | |
3197 | ||
3198 | mutex_lock(&__ip_vs_mutex); | |
3199 | ||
3200 | reply = genlmsg_put_reply(msg, info, &ip_vs_genl_family, 0, reply_cmd); | |
3201 | if (reply == NULL) | |
3202 | goto nla_put_failure; | |
3203 | ||
3204 | switch (cmd) { | |
3205 | case IPVS_CMD_GET_SERVICE: | |
3206 | { | |
3207 | struct ip_vs_service *svc; | |
3208 | ||
3209 | svc = ip_vs_genl_find_service(info->attrs[IPVS_CMD_ATTR_SERVICE]); | |
3210 | if (IS_ERR(svc)) { | |
3211 | ret = PTR_ERR(svc); | |
3212 | goto out_err; | |
3213 | } else if (svc) { | |
3214 | ret = ip_vs_genl_fill_service(msg, svc); | |
3215 | ip_vs_service_put(svc); | |
3216 | if (ret) | |
3217 | goto nla_put_failure; | |
3218 | } else { | |
3219 | ret = -ESRCH; | |
3220 | goto out_err; | |
3221 | } | |
3222 | ||
3223 | break; | |
3224 | } | |
3225 | ||
3226 | case IPVS_CMD_GET_CONFIG: | |
3227 | { | |
3228 | struct ip_vs_timeout_user t; | |
3229 | ||
3230 | __ip_vs_get_timeouts(&t); | |
3231 | #ifdef CONFIG_IP_VS_PROTO_TCP | |
3232 | NLA_PUT_U32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP, t.tcp_timeout); | |
3233 | NLA_PUT_U32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP_FIN, | |
3234 | t.tcp_fin_timeout); | |
3235 | #endif | |
3236 | #ifdef CONFIG_IP_VS_PROTO_UDP | |
3237 | NLA_PUT_U32(msg, IPVS_CMD_ATTR_TIMEOUT_UDP, t.udp_timeout); | |
3238 | #endif | |
3239 | ||
3240 | break; | |
3241 | } | |
3242 | ||
3243 | case IPVS_CMD_GET_INFO: | |
3244 | NLA_PUT_U32(msg, IPVS_INFO_ATTR_VERSION, IP_VS_VERSION_CODE); | |
3245 | NLA_PUT_U32(msg, IPVS_INFO_ATTR_CONN_TAB_SIZE, | |
6f7edb48 | 3246 | ip_vs_conn_tab_size); |
9a812198 JV |
3247 | break; |
3248 | } | |
3249 | ||
3250 | genlmsg_end(msg, reply); | |
134e6375 | 3251 | ret = genlmsg_reply(msg, info); |
9a812198 JV |
3252 | goto out; |
3253 | ||
3254 | nla_put_failure: | |
1e3e238e | 3255 | pr_err("not enough space in Netlink message\n"); |
9a812198 JV |
3256 | ret = -EMSGSIZE; |
3257 | ||
3258 | out_err: | |
3259 | nlmsg_free(msg); | |
3260 | out: | |
3261 | mutex_unlock(&__ip_vs_mutex); | |
3262 | ||
3263 | return ret; | |
3264 | } | |
3265 | ||
3266 | ||
3267 | static struct genl_ops ip_vs_genl_ops[] __read_mostly = { | |
3268 | { | |
3269 | .cmd = IPVS_CMD_NEW_SERVICE, | |
3270 | .flags = GENL_ADMIN_PERM, | |
3271 | .policy = ip_vs_cmd_policy, | |
3272 | .doit = ip_vs_genl_set_cmd, | |
3273 | }, | |
3274 | { | |
3275 | .cmd = IPVS_CMD_SET_SERVICE, | |
3276 | .flags = GENL_ADMIN_PERM, | |
3277 | .policy = ip_vs_cmd_policy, | |
3278 | .doit = ip_vs_genl_set_cmd, | |
3279 | }, | |
3280 | { | |
3281 | .cmd = IPVS_CMD_DEL_SERVICE, | |
3282 | .flags = GENL_ADMIN_PERM, | |
3283 | .policy = ip_vs_cmd_policy, | |
3284 | .doit = ip_vs_genl_set_cmd, | |
3285 | }, | |
3286 | { | |
3287 | .cmd = IPVS_CMD_GET_SERVICE, | |
3288 | .flags = GENL_ADMIN_PERM, | |
3289 | .doit = ip_vs_genl_get_cmd, | |
3290 | .dumpit = ip_vs_genl_dump_services, | |
3291 | .policy = ip_vs_cmd_policy, | |
3292 | }, | |
3293 | { | |
3294 | .cmd = IPVS_CMD_NEW_DEST, | |
3295 | .flags = GENL_ADMIN_PERM, | |
3296 | .policy = ip_vs_cmd_policy, | |
3297 | .doit = ip_vs_genl_set_cmd, | |
3298 | }, | |
3299 | { | |
3300 | .cmd = IPVS_CMD_SET_DEST, | |
3301 | .flags = GENL_ADMIN_PERM, | |
3302 | .policy = ip_vs_cmd_policy, | |
3303 | .doit = ip_vs_genl_set_cmd, | |
3304 | }, | |
3305 | { | |
3306 | .cmd = IPVS_CMD_DEL_DEST, | |
3307 | .flags = GENL_ADMIN_PERM, | |
3308 | .policy = ip_vs_cmd_policy, | |
3309 | .doit = ip_vs_genl_set_cmd, | |
3310 | }, | |
3311 | { | |
3312 | .cmd = IPVS_CMD_GET_DEST, | |
3313 | .flags = GENL_ADMIN_PERM, | |
3314 | .policy = ip_vs_cmd_policy, | |
3315 | .dumpit = ip_vs_genl_dump_dests, | |
3316 | }, | |
3317 | { | |
3318 | .cmd = IPVS_CMD_NEW_DAEMON, | |
3319 | .flags = GENL_ADMIN_PERM, | |
3320 | .policy = ip_vs_cmd_policy, | |
3321 | .doit = ip_vs_genl_set_cmd, | |
3322 | }, | |
3323 | { | |
3324 | .cmd = IPVS_CMD_DEL_DAEMON, | |
3325 | .flags = GENL_ADMIN_PERM, | |
3326 | .policy = ip_vs_cmd_policy, | |
3327 | .doit = ip_vs_genl_set_cmd, | |
3328 | }, | |
3329 | { | |
3330 | .cmd = IPVS_CMD_GET_DAEMON, | |
3331 | .flags = GENL_ADMIN_PERM, | |
3332 | .dumpit = ip_vs_genl_dump_daemons, | |
3333 | }, | |
3334 | { | |
3335 | .cmd = IPVS_CMD_SET_CONFIG, | |
3336 | .flags = GENL_ADMIN_PERM, | |
3337 | .policy = ip_vs_cmd_policy, | |
3338 | .doit = ip_vs_genl_set_cmd, | |
3339 | }, | |
3340 | { | |
3341 | .cmd = IPVS_CMD_GET_CONFIG, | |
3342 | .flags = GENL_ADMIN_PERM, | |
3343 | .doit = ip_vs_genl_get_cmd, | |
3344 | }, | |
3345 | { | |
3346 | .cmd = IPVS_CMD_GET_INFO, | |
3347 | .flags = GENL_ADMIN_PERM, | |
3348 | .doit = ip_vs_genl_get_cmd, | |
3349 | }, | |
3350 | { | |
3351 | .cmd = IPVS_CMD_ZERO, | |
3352 | .flags = GENL_ADMIN_PERM, | |
3353 | .policy = ip_vs_cmd_policy, | |
3354 | .doit = ip_vs_genl_set_cmd, | |
3355 | }, | |
3356 | { | |
3357 | .cmd = IPVS_CMD_FLUSH, | |
3358 | .flags = GENL_ADMIN_PERM, | |
3359 | .doit = ip_vs_genl_set_cmd, | |
3360 | }, | |
3361 | }; | |
3362 | ||
3363 | static int __init ip_vs_genl_register(void) | |
3364 | { | |
8f698d54 MM |
3365 | return genl_register_family_with_ops(&ip_vs_genl_family, |
3366 | ip_vs_genl_ops, ARRAY_SIZE(ip_vs_genl_ops)); | |
9a812198 JV |
3367 | } |
3368 | ||
3369 | static void ip_vs_genl_unregister(void) | |
3370 | { | |
3371 | genl_unregister_family(&ip_vs_genl_family); | |
3372 | } | |
3373 | ||
3374 | /* End of Generic Netlink interface definitions */ | |
3375 | ||
1da177e4 | 3376 | |
048cf48b | 3377 | int __init ip_vs_control_init(void) |
1da177e4 LT |
3378 | { |
3379 | int ret; | |
3380 | int idx; | |
3381 | ||
3382 | EnterFunction(2); | |
3383 | ||
3384 | ret = nf_register_sockopt(&ip_vs_sockopts); | |
3385 | if (ret) { | |
1e3e238e | 3386 | pr_err("cannot register sockopt.\n"); |
1da177e4 LT |
3387 | return ret; |
3388 | } | |
3389 | ||
9a812198 JV |
3390 | ret = ip_vs_genl_register(); |
3391 | if (ret) { | |
1e3e238e | 3392 | pr_err("cannot register Generic Netlink interface.\n"); |
9a812198 JV |
3393 | nf_unregister_sockopt(&ip_vs_sockopts); |
3394 | return ret; | |
3395 | } | |
3396 | ||
457c4cbc EB |
3397 | proc_net_fops_create(&init_net, "ip_vs", 0, &ip_vs_info_fops); |
3398 | proc_net_fops_create(&init_net, "ip_vs_stats",0, &ip_vs_stats_fops); | |
1da177e4 | 3399 | |
90754f8e | 3400 | sysctl_header = register_sysctl_paths(net_vs_ctl_path, vs_vars); |
1da177e4 LT |
3401 | |
3402 | /* Initialize ip_vs_svc_table, ip_vs_svc_fwm_table, ip_vs_rtable */ | |
3403 | for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
3404 | INIT_LIST_HEAD(&ip_vs_svc_table[idx]); | |
3405 | INIT_LIST_HEAD(&ip_vs_svc_fwm_table[idx]); | |
3406 | } | |
3407 | for(idx = 0; idx < IP_VS_RTAB_SIZE; idx++) { | |
3408 | INIT_LIST_HEAD(&ip_vs_rtable[idx]); | |
3409 | } | |
3410 | ||
1da177e4 LT |
3411 | ip_vs_new_estimator(&ip_vs_stats); |
3412 | ||
3413 | /* Hook the defense timer */ | |
3414 | schedule_delayed_work(&defense_work, DEFENSE_TIMER_PERIOD); | |
3415 | ||
3416 | LeaveFunction(2); | |
3417 | return 0; | |
3418 | } | |
3419 | ||
3420 | ||
3421 | void ip_vs_control_cleanup(void) | |
3422 | { | |
3423 | EnterFunction(2); | |
3424 | ip_vs_trash_cleanup(); | |
3425 | cancel_rearming_delayed_work(&defense_work); | |
28e53bdd | 3426 | cancel_work_sync(&defense_work.work); |
1da177e4 LT |
3427 | ip_vs_kill_estimator(&ip_vs_stats); |
3428 | unregister_sysctl_table(sysctl_header); | |
457c4cbc EB |
3429 | proc_net_remove(&init_net, "ip_vs_stats"); |
3430 | proc_net_remove(&init_net, "ip_vs"); | |
9a812198 | 3431 | ip_vs_genl_unregister(); |
1da177e4 LT |
3432 | nf_unregister_sockopt(&ip_vs_sockopts); |
3433 | LeaveFunction(2); | |
3434 | } |