Commit | Line | Data |
---|---|---|
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 | 33 | #include <linux/seq_file.h> |
5a0e3ad6 | 34 | #include <linux/slab.h> |
1da177e4 LT |
35 | |
36 | #include <linux/netfilter.h> | |
37 | #include <linux/netfilter_ipv4.h> | |
14cc3e2b | 38 | #include <linux/mutex.h> |
1da177e4 | 39 | |
457c4cbc | 40 | #include <net/net_namespace.h> |
9330419d | 41 | #include <linux/nsproxy.h> |
1da177e4 | 42 | #include <net/ip.h> |
09571c7a VB |
43 | #ifdef CONFIG_IP_VS_IPV6 |
44 | #include <net/ipv6.h> | |
45 | #include <net/ip6_route.h> | |
46 | #endif | |
14c85021 | 47 | #include <net/route.h> |
1da177e4 | 48 | #include <net/sock.h> |
9a812198 | 49 | #include <net/genetlink.h> |
1da177e4 LT |
50 | |
51 | #include <asm/uaccess.h> | |
52 | ||
53 | #include <net/ip_vs.h> | |
54 | ||
55 | /* semaphore for IPVS sockopts. And, [gs]etsockopt may sleep. */ | |
14cc3e2b | 56 | static DEFINE_MUTEX(__ip_vs_mutex); |
1da177e4 LT |
57 | |
58 | /* lock for service table */ | |
59 | static DEFINE_RWLOCK(__ip_vs_svc_lock); | |
60 | ||
1da177e4 | 61 | /* sysctl variables */ |
1da177e4 LT |
62 | |
63 | #ifdef CONFIG_IP_VS_DEBUG | |
64 | static int sysctl_ip_vs_debug_level = 0; | |
65 | ||
66 | int ip_vs_get_debug_level(void) | |
67 | { | |
68 | return sysctl_ip_vs_debug_level; | |
69 | } | |
70 | #endif | |
71 | ||
7a4f0761 HS |
72 | |
73 | /* Protos */ | |
74 | static void __ip_vs_del_service(struct ip_vs_service *svc); | |
75 | ||
76 | ||
09571c7a VB |
77 | #ifdef CONFIG_IP_VS_IPV6 |
78 | /* Taken from rt6_fill_node() in net/ipv6/route.c, is there a better way? */ | |
4a98480b HS |
79 | static int __ip_vs_addr_is_local_v6(struct net *net, |
80 | const struct in6_addr *addr) | |
09571c7a VB |
81 | { |
82 | struct rt6_info *rt; | |
4c9483b2 DM |
83 | struct flowi6 fl6 = { |
84 | .daddr = *addr, | |
09571c7a VB |
85 | }; |
86 | ||
4c9483b2 | 87 | rt = (struct rt6_info *)ip6_route_output(net, NULL, &fl6); |
09571c7a | 88 | if (rt && rt->rt6i_dev && (rt->rt6i_dev->flags & IFF_LOOPBACK)) |
4c9483b2 | 89 | return 1; |
09571c7a VB |
90 | |
91 | return 0; | |
92 | } | |
93 | #endif | |
14e40546 SH |
94 | |
95 | #ifdef CONFIG_SYSCTL | |
1da177e4 | 96 | /* |
af9debd4 JA |
97 | * update_defense_level is called from keventd and from sysctl, |
98 | * so it needs to protect itself from softirqs | |
1da177e4 | 99 | */ |
9330419d | 100 | static void update_defense_level(struct netns_ipvs *ipvs) |
1da177e4 LT |
101 | { |
102 | struct sysinfo i; | |
103 | static int old_secure_tcp = 0; | |
104 | int availmem; | |
105 | int nomem; | |
106 | int to_change = -1; | |
107 | ||
108 | /* we only count free and buffered memory (in pages) */ | |
109 | si_meminfo(&i); | |
110 | availmem = i.freeram + i.bufferram; | |
111 | /* however in linux 2.5 the i.bufferram is total page cache size, | |
112 | we need adjust it */ | |
113 | /* si_swapinfo(&i); */ | |
114 | /* availmem = availmem - (i.totalswap - i.freeswap); */ | |
115 | ||
a0840e2e | 116 | nomem = (availmem < ipvs->sysctl_amemthresh); |
1da177e4 | 117 | |
af9debd4 JA |
118 | local_bh_disable(); |
119 | ||
1da177e4 | 120 | /* drop_entry */ |
a0840e2e HS |
121 | spin_lock(&ipvs->dropentry_lock); |
122 | switch (ipvs->sysctl_drop_entry) { | |
1da177e4 | 123 | case 0: |
a0840e2e | 124 | atomic_set(&ipvs->dropentry, 0); |
1da177e4 LT |
125 | break; |
126 | case 1: | |
127 | if (nomem) { | |
a0840e2e HS |
128 | atomic_set(&ipvs->dropentry, 1); |
129 | ipvs->sysctl_drop_entry = 2; | |
1da177e4 | 130 | } else { |
a0840e2e | 131 | atomic_set(&ipvs->dropentry, 0); |
1da177e4 LT |
132 | } |
133 | break; | |
134 | case 2: | |
135 | if (nomem) { | |
a0840e2e | 136 | atomic_set(&ipvs->dropentry, 1); |
1da177e4 | 137 | } else { |
a0840e2e HS |
138 | atomic_set(&ipvs->dropentry, 0); |
139 | ipvs->sysctl_drop_entry = 1; | |
1da177e4 LT |
140 | }; |
141 | break; | |
142 | case 3: | |
a0840e2e | 143 | atomic_set(&ipvs->dropentry, 1); |
1da177e4 LT |
144 | break; |
145 | } | |
a0840e2e | 146 | spin_unlock(&ipvs->dropentry_lock); |
1da177e4 LT |
147 | |
148 | /* drop_packet */ | |
a0840e2e HS |
149 | spin_lock(&ipvs->droppacket_lock); |
150 | switch (ipvs->sysctl_drop_packet) { | |
1da177e4 | 151 | case 0: |
a0840e2e | 152 | ipvs->drop_rate = 0; |
1da177e4 LT |
153 | break; |
154 | case 1: | |
155 | if (nomem) { | |
a0840e2e HS |
156 | ipvs->drop_rate = ipvs->drop_counter |
157 | = ipvs->sysctl_amemthresh / | |
158 | (ipvs->sysctl_amemthresh-availmem); | |
159 | ipvs->sysctl_drop_packet = 2; | |
1da177e4 | 160 | } else { |
a0840e2e | 161 | ipvs->drop_rate = 0; |
1da177e4 LT |
162 | } |
163 | break; | |
164 | case 2: | |
165 | if (nomem) { | |
a0840e2e HS |
166 | ipvs->drop_rate = ipvs->drop_counter |
167 | = ipvs->sysctl_amemthresh / | |
168 | (ipvs->sysctl_amemthresh-availmem); | |
1da177e4 | 169 | } else { |
a0840e2e HS |
170 | ipvs->drop_rate = 0; |
171 | ipvs->sysctl_drop_packet = 1; | |
1da177e4 LT |
172 | } |
173 | break; | |
174 | case 3: | |
a0840e2e | 175 | ipvs->drop_rate = ipvs->sysctl_am_droprate; |
1da177e4 LT |
176 | break; |
177 | } | |
a0840e2e | 178 | spin_unlock(&ipvs->droppacket_lock); |
1da177e4 LT |
179 | |
180 | /* secure_tcp */ | |
a0840e2e HS |
181 | spin_lock(&ipvs->securetcp_lock); |
182 | switch (ipvs->sysctl_secure_tcp) { | |
1da177e4 LT |
183 | case 0: |
184 | if (old_secure_tcp >= 2) | |
185 | to_change = 0; | |
186 | break; | |
187 | case 1: | |
188 | if (nomem) { | |
189 | if (old_secure_tcp < 2) | |
190 | to_change = 1; | |
a0840e2e | 191 | ipvs->sysctl_secure_tcp = 2; |
1da177e4 LT |
192 | } else { |
193 | if (old_secure_tcp >= 2) | |
194 | to_change = 0; | |
195 | } | |
196 | break; | |
197 | case 2: | |
198 | if (nomem) { | |
199 | if (old_secure_tcp < 2) | |
200 | to_change = 1; | |
201 | } else { | |
202 | if (old_secure_tcp >= 2) | |
203 | to_change = 0; | |
a0840e2e | 204 | ipvs->sysctl_secure_tcp = 1; |
1da177e4 LT |
205 | } |
206 | break; | |
207 | case 3: | |
208 | if (old_secure_tcp < 2) | |
209 | to_change = 1; | |
210 | break; | |
211 | } | |
a0840e2e | 212 | old_secure_tcp = ipvs->sysctl_secure_tcp; |
1da177e4 | 213 | if (to_change >= 0) |
9330419d | 214 | ip_vs_protocol_timeout_change(ipvs, |
a0840e2e HS |
215 | ipvs->sysctl_secure_tcp > 1); |
216 | spin_unlock(&ipvs->securetcp_lock); | |
af9debd4 JA |
217 | |
218 | local_bh_enable(); | |
1da177e4 LT |
219 | } |
220 | ||
221 | ||
222 | /* | |
223 | * Timer for checking the defense | |
224 | */ | |
225 | #define DEFENSE_TIMER_PERIOD 1*HZ | |
1da177e4 | 226 | |
c4028958 | 227 | static void defense_work_handler(struct work_struct *work) |
1da177e4 | 228 | { |
f6340ee0 HS |
229 | struct netns_ipvs *ipvs = |
230 | container_of(work, struct netns_ipvs, defense_work.work); | |
9330419d HS |
231 | |
232 | update_defense_level(ipvs); | |
a0840e2e | 233 | if (atomic_read(&ipvs->dropentry)) |
f6340ee0 HS |
234 | ip_vs_random_dropentry(ipvs->net); |
235 | schedule_delayed_work(&ipvs->defense_work, DEFENSE_TIMER_PERIOD); | |
1da177e4 | 236 | } |
14e40546 | 237 | #endif |
1da177e4 LT |
238 | |
239 | int | |
240 | ip_vs_use_count_inc(void) | |
241 | { | |
242 | return try_module_get(THIS_MODULE); | |
243 | } | |
244 | ||
245 | void | |
246 | ip_vs_use_count_dec(void) | |
247 | { | |
248 | module_put(THIS_MODULE); | |
249 | } | |
250 | ||
251 | ||
252 | /* | |
253 | * Hash table: for virtual service lookups | |
254 | */ | |
255 | #define IP_VS_SVC_TAB_BITS 8 | |
256 | #define IP_VS_SVC_TAB_SIZE (1 << IP_VS_SVC_TAB_BITS) | |
257 | #define IP_VS_SVC_TAB_MASK (IP_VS_SVC_TAB_SIZE - 1) | |
258 | ||
259 | /* the service table hashed by <protocol, addr, port> */ | |
260 | static struct list_head ip_vs_svc_table[IP_VS_SVC_TAB_SIZE]; | |
261 | /* the service table hashed by fwmark */ | |
262 | static struct list_head ip_vs_svc_fwm_table[IP_VS_SVC_TAB_SIZE]; | |
263 | ||
1da177e4 LT |
264 | |
265 | /* | |
266 | * Returns hash value for virtual service | |
267 | */ | |
fc723250 HS |
268 | static inline unsigned |
269 | ip_vs_svc_hashkey(struct net *net, int af, unsigned proto, | |
270 | const union nf_inet_addr *addr, __be16 port) | |
1da177e4 LT |
271 | { |
272 | register unsigned porth = ntohs(port); | |
b18610de | 273 | __be32 addr_fold = addr->ip; |
1da177e4 | 274 | |
b18610de JV |
275 | #ifdef CONFIG_IP_VS_IPV6 |
276 | if (af == AF_INET6) | |
277 | addr_fold = addr->ip6[0]^addr->ip6[1]^ | |
278 | addr->ip6[2]^addr->ip6[3]; | |
279 | #endif | |
fc723250 | 280 | addr_fold ^= ((size_t)net>>8); |
b18610de JV |
281 | |
282 | return (proto^ntohl(addr_fold)^(porth>>IP_VS_SVC_TAB_BITS)^porth) | |
1da177e4 LT |
283 | & IP_VS_SVC_TAB_MASK; |
284 | } | |
285 | ||
286 | /* | |
287 | * Returns hash value of fwmark for virtual service lookup | |
288 | */ | |
fc723250 | 289 | static inline unsigned ip_vs_svc_fwm_hashkey(struct net *net, __u32 fwmark) |
1da177e4 | 290 | { |
fc723250 | 291 | return (((size_t)net>>8) ^ fwmark) & IP_VS_SVC_TAB_MASK; |
1da177e4 LT |
292 | } |
293 | ||
294 | /* | |
fc723250 | 295 | * Hashes a service in the ip_vs_svc_table by <netns,proto,addr,port> |
1da177e4 LT |
296 | * or in the ip_vs_svc_fwm_table by fwmark. |
297 | * Should be called with locked tables. | |
298 | */ | |
299 | static int ip_vs_svc_hash(struct ip_vs_service *svc) | |
300 | { | |
301 | unsigned hash; | |
302 | ||
303 | if (svc->flags & IP_VS_SVC_F_HASHED) { | |
1e3e238e HE |
304 | pr_err("%s(): request for already hashed, called from %pF\n", |
305 | __func__, __builtin_return_address(0)); | |
1da177e4 LT |
306 | return 0; |
307 | } | |
308 | ||
309 | if (svc->fwmark == 0) { | |
310 | /* | |
fc723250 | 311 | * Hash it by <netns,protocol,addr,port> in ip_vs_svc_table |
1da177e4 | 312 | */ |
fc723250 HS |
313 | hash = ip_vs_svc_hashkey(svc->net, svc->af, svc->protocol, |
314 | &svc->addr, svc->port); | |
1da177e4 LT |
315 | list_add(&svc->s_list, &ip_vs_svc_table[hash]); |
316 | } else { | |
317 | /* | |
fc723250 | 318 | * Hash it by fwmark in svc_fwm_table |
1da177e4 | 319 | */ |
fc723250 | 320 | hash = ip_vs_svc_fwm_hashkey(svc->net, svc->fwmark); |
1da177e4 LT |
321 | list_add(&svc->f_list, &ip_vs_svc_fwm_table[hash]); |
322 | } | |
323 | ||
324 | svc->flags |= IP_VS_SVC_F_HASHED; | |
325 | /* increase its refcnt because it is referenced by the svc table */ | |
326 | atomic_inc(&svc->refcnt); | |
327 | return 1; | |
328 | } | |
329 | ||
330 | ||
331 | /* | |
fc723250 | 332 | * Unhashes a service from svc_table / svc_fwm_table. |
1da177e4 LT |
333 | * Should be called with locked tables. |
334 | */ | |
335 | static int ip_vs_svc_unhash(struct ip_vs_service *svc) | |
336 | { | |
337 | if (!(svc->flags & IP_VS_SVC_F_HASHED)) { | |
1e3e238e HE |
338 | pr_err("%s(): request for unhash flagged, called from %pF\n", |
339 | __func__, __builtin_return_address(0)); | |
1da177e4 LT |
340 | return 0; |
341 | } | |
342 | ||
343 | if (svc->fwmark == 0) { | |
fc723250 | 344 | /* Remove it from the svc_table table */ |
1da177e4 LT |
345 | list_del(&svc->s_list); |
346 | } else { | |
fc723250 | 347 | /* Remove it from the svc_fwm_table table */ |
1da177e4 LT |
348 | list_del(&svc->f_list); |
349 | } | |
350 | ||
351 | svc->flags &= ~IP_VS_SVC_F_HASHED; | |
352 | atomic_dec(&svc->refcnt); | |
353 | return 1; | |
354 | } | |
355 | ||
356 | ||
357 | /* | |
fc723250 | 358 | * Get service by {netns, proto,addr,port} in the service table. |
1da177e4 | 359 | */ |
b18610de | 360 | static inline struct ip_vs_service * |
fc723250 HS |
361 | __ip_vs_service_find(struct net *net, int af, __u16 protocol, |
362 | const union nf_inet_addr *vaddr, __be16 vport) | |
1da177e4 LT |
363 | { |
364 | unsigned hash; | |
365 | struct ip_vs_service *svc; | |
366 | ||
367 | /* Check for "full" addressed entries */ | |
fc723250 | 368 | hash = ip_vs_svc_hashkey(net, af, protocol, vaddr, vport); |
1da177e4 LT |
369 | |
370 | list_for_each_entry(svc, &ip_vs_svc_table[hash], s_list){ | |
b18610de JV |
371 | if ((svc->af == af) |
372 | && ip_vs_addr_equal(af, &svc->addr, vaddr) | |
1da177e4 | 373 | && (svc->port == vport) |
fc723250 HS |
374 | && (svc->protocol == protocol) |
375 | && net_eq(svc->net, net)) { | |
1da177e4 | 376 | /* HIT */ |
1da177e4 LT |
377 | return svc; |
378 | } | |
379 | } | |
380 | ||
381 | return NULL; | |
382 | } | |
383 | ||
384 | ||
385 | /* | |
386 | * Get service by {fwmark} in the service table. | |
387 | */ | |
b18610de | 388 | static inline struct ip_vs_service * |
fc723250 | 389 | __ip_vs_svc_fwm_find(struct net *net, int af, __u32 fwmark) |
1da177e4 LT |
390 | { |
391 | unsigned hash; | |
392 | struct ip_vs_service *svc; | |
393 | ||
394 | /* Check for fwmark addressed entries */ | |
fc723250 | 395 | hash = ip_vs_svc_fwm_hashkey(net, fwmark); |
1da177e4 LT |
396 | |
397 | list_for_each_entry(svc, &ip_vs_svc_fwm_table[hash], f_list) { | |
fc723250 HS |
398 | if (svc->fwmark == fwmark && svc->af == af |
399 | && net_eq(svc->net, net)) { | |
1da177e4 | 400 | /* HIT */ |
1da177e4 LT |
401 | return svc; |
402 | } | |
403 | } | |
404 | ||
405 | return NULL; | |
406 | } | |
407 | ||
408 | struct ip_vs_service * | |
fc723250 | 409 | ip_vs_service_get(struct net *net, int af, __u32 fwmark, __u16 protocol, |
3c2e0505 | 410 | const union nf_inet_addr *vaddr, __be16 vport) |
1da177e4 LT |
411 | { |
412 | struct ip_vs_service *svc; | |
763f8d0e | 413 | struct netns_ipvs *ipvs = net_ipvs(net); |
3c2e0505 | 414 | |
1da177e4 LT |
415 | read_lock(&__ip_vs_svc_lock); |
416 | ||
417 | /* | |
418 | * Check the table hashed by fwmark first | |
419 | */ | |
097fc76a JA |
420 | if (fwmark) { |
421 | svc = __ip_vs_svc_fwm_find(net, af, fwmark); | |
422 | if (svc) | |
423 | goto out; | |
424 | } | |
1da177e4 LT |
425 | |
426 | /* | |
427 | * Check the table hashed by <protocol,addr,port> | |
428 | * for "full" addressed entries | |
429 | */ | |
fc723250 | 430 | svc = __ip_vs_service_find(net, af, protocol, vaddr, vport); |
1da177e4 LT |
431 | |
432 | if (svc == NULL | |
433 | && protocol == IPPROTO_TCP | |
763f8d0e | 434 | && atomic_read(&ipvs->ftpsvc_counter) |
1da177e4 LT |
435 | && (vport == FTPDATA || ntohs(vport) >= PROT_SOCK)) { |
436 | /* | |
437 | * Check if ftp service entry exists, the packet | |
438 | * might belong to FTP data connections. | |
439 | */ | |
fc723250 | 440 | svc = __ip_vs_service_find(net, af, protocol, vaddr, FTPPORT); |
1da177e4 LT |
441 | } |
442 | ||
443 | if (svc == NULL | |
763f8d0e | 444 | && atomic_read(&ipvs->nullsvc_counter)) { |
1da177e4 LT |
445 | /* |
446 | * Check if the catch-all port (port zero) exists | |
447 | */ | |
fc723250 | 448 | svc = __ip_vs_service_find(net, af, protocol, vaddr, 0); |
1da177e4 LT |
449 | } |
450 | ||
451 | out: | |
26c15cfd JA |
452 | if (svc) |
453 | atomic_inc(&svc->usecnt); | |
1da177e4 LT |
454 | read_unlock(&__ip_vs_svc_lock); |
455 | ||
3c2e0505 JV |
456 | IP_VS_DBG_BUF(9, "lookup service: fwm %u %s %s:%u %s\n", |
457 | fwmark, ip_vs_proto_name(protocol), | |
458 | IP_VS_DBG_ADDR(af, vaddr), ntohs(vport), | |
459 | svc ? "hit" : "not hit"); | |
1da177e4 LT |
460 | |
461 | return svc; | |
462 | } | |
463 | ||
464 | ||
465 | static inline void | |
466 | __ip_vs_bind_svc(struct ip_vs_dest *dest, struct ip_vs_service *svc) | |
467 | { | |
468 | atomic_inc(&svc->refcnt); | |
469 | dest->svc = svc; | |
470 | } | |
471 | ||
26c15cfd | 472 | static void |
1da177e4 LT |
473 | __ip_vs_unbind_svc(struct ip_vs_dest *dest) |
474 | { | |
475 | struct ip_vs_service *svc = dest->svc; | |
476 | ||
477 | dest->svc = NULL; | |
26c15cfd JA |
478 | if (atomic_dec_and_test(&svc->refcnt)) { |
479 | IP_VS_DBG_BUF(3, "Removing service %u/%s:%u usecnt=%d\n", | |
480 | svc->fwmark, | |
481 | IP_VS_DBG_ADDR(svc->af, &svc->addr), | |
482 | ntohs(svc->port), atomic_read(&svc->usecnt)); | |
b17fc996 | 483 | free_percpu(svc->stats.cpustats); |
1da177e4 | 484 | kfree(svc); |
26c15cfd | 485 | } |
1da177e4 LT |
486 | } |
487 | ||
488 | ||
489 | /* | |
490 | * Returns hash value for real service | |
491 | */ | |
7937df15 JV |
492 | static inline unsigned ip_vs_rs_hashkey(int af, |
493 | const union nf_inet_addr *addr, | |
494 | __be16 port) | |
1da177e4 LT |
495 | { |
496 | register unsigned porth = ntohs(port); | |
7937df15 JV |
497 | __be32 addr_fold = addr->ip; |
498 | ||
499 | #ifdef CONFIG_IP_VS_IPV6 | |
500 | if (af == AF_INET6) | |
501 | addr_fold = addr->ip6[0]^addr->ip6[1]^ | |
502 | addr->ip6[2]^addr->ip6[3]; | |
503 | #endif | |
1da177e4 | 504 | |
7937df15 | 505 | return (ntohl(addr_fold)^(porth>>IP_VS_RTAB_BITS)^porth) |
1da177e4 LT |
506 | & IP_VS_RTAB_MASK; |
507 | } | |
508 | ||
509 | /* | |
fc723250 | 510 | * Hashes ip_vs_dest in rs_table by <proto,addr,port>. |
1da177e4 LT |
511 | * should be called with locked tables. |
512 | */ | |
fc723250 | 513 | static int ip_vs_rs_hash(struct netns_ipvs *ipvs, struct ip_vs_dest *dest) |
1da177e4 LT |
514 | { |
515 | unsigned hash; | |
516 | ||
517 | if (!list_empty(&dest->d_list)) { | |
518 | return 0; | |
519 | } | |
520 | ||
521 | /* | |
522 | * Hash by proto,addr,port, | |
523 | * which are the parameters of the real service. | |
524 | */ | |
7937df15 JV |
525 | hash = ip_vs_rs_hashkey(dest->af, &dest->addr, dest->port); |
526 | ||
fc723250 | 527 | list_add(&dest->d_list, &ipvs->rs_table[hash]); |
1da177e4 LT |
528 | |
529 | return 1; | |
530 | } | |
531 | ||
532 | /* | |
fc723250 | 533 | * UNhashes ip_vs_dest from rs_table. |
1da177e4 LT |
534 | * should be called with locked tables. |
535 | */ | |
536 | static int ip_vs_rs_unhash(struct ip_vs_dest *dest) | |
537 | { | |
538 | /* | |
fc723250 | 539 | * Remove it from the rs_table table. |
1da177e4 LT |
540 | */ |
541 | if (!list_empty(&dest->d_list)) { | |
542 | list_del(&dest->d_list); | |
543 | INIT_LIST_HEAD(&dest->d_list); | |
544 | } | |
545 | ||
546 | return 1; | |
547 | } | |
548 | ||
549 | /* | |
550 | * Lookup real service by <proto,addr,port> in the real service table. | |
551 | */ | |
552 | struct ip_vs_dest * | |
fc723250 | 553 | ip_vs_lookup_real_service(struct net *net, int af, __u16 protocol, |
7937df15 JV |
554 | const union nf_inet_addr *daddr, |
555 | __be16 dport) | |
1da177e4 | 556 | { |
fc723250 | 557 | struct netns_ipvs *ipvs = net_ipvs(net); |
1da177e4 LT |
558 | unsigned hash; |
559 | struct ip_vs_dest *dest; | |
560 | ||
561 | /* | |
562 | * Check for "full" addressed entries | |
563 | * Return the first found entry | |
564 | */ | |
7937df15 | 565 | hash = ip_vs_rs_hashkey(af, daddr, dport); |
1da177e4 | 566 | |
a0840e2e | 567 | read_lock(&ipvs->rs_lock); |
fc723250 | 568 | list_for_each_entry(dest, &ipvs->rs_table[hash], d_list) { |
7937df15 JV |
569 | if ((dest->af == af) |
570 | && ip_vs_addr_equal(af, &dest->addr, daddr) | |
1da177e4 LT |
571 | && (dest->port == dport) |
572 | && ((dest->protocol == protocol) || | |
573 | dest->vfwmark)) { | |
574 | /* HIT */ | |
a0840e2e | 575 | read_unlock(&ipvs->rs_lock); |
1da177e4 LT |
576 | return dest; |
577 | } | |
578 | } | |
a0840e2e | 579 | read_unlock(&ipvs->rs_lock); |
1da177e4 LT |
580 | |
581 | return NULL; | |
582 | } | |
583 | ||
584 | /* | |
585 | * Lookup destination by {addr,port} in the given service | |
586 | */ | |
587 | static struct ip_vs_dest * | |
7937df15 JV |
588 | ip_vs_lookup_dest(struct ip_vs_service *svc, const union nf_inet_addr *daddr, |
589 | __be16 dport) | |
1da177e4 LT |
590 | { |
591 | struct ip_vs_dest *dest; | |
592 | ||
593 | /* | |
594 | * Find the destination for the given service | |
595 | */ | |
596 | list_for_each_entry(dest, &svc->destinations, n_list) { | |
7937df15 JV |
597 | if ((dest->af == svc->af) |
598 | && ip_vs_addr_equal(svc->af, &dest->addr, daddr) | |
599 | && (dest->port == dport)) { | |
1da177e4 LT |
600 | /* HIT */ |
601 | return dest; | |
602 | } | |
603 | } | |
604 | ||
605 | return NULL; | |
606 | } | |
607 | ||
1e356f9c RB |
608 | /* |
609 | * Find destination by {daddr,dport,vaddr,protocol} | |
610 | * Cretaed to be used in ip_vs_process_message() in | |
611 | * the backup synchronization daemon. It finds the | |
612 | * destination to be bound to the received connection | |
613 | * on the backup. | |
614 | * | |
615 | * ip_vs_lookup_real_service() looked promissing, but | |
616 | * seems not working as expected. | |
617 | */ | |
fc723250 HS |
618 | struct ip_vs_dest *ip_vs_find_dest(struct net *net, int af, |
619 | const union nf_inet_addr *daddr, | |
7937df15 JV |
620 | __be16 dport, |
621 | const union nf_inet_addr *vaddr, | |
0e051e68 | 622 | __be16 vport, __u16 protocol, __u32 fwmark) |
1e356f9c RB |
623 | { |
624 | struct ip_vs_dest *dest; | |
625 | struct ip_vs_service *svc; | |
626 | ||
fc723250 | 627 | svc = ip_vs_service_get(net, af, fwmark, protocol, vaddr, vport); |
1e356f9c RB |
628 | if (!svc) |
629 | return NULL; | |
630 | dest = ip_vs_lookup_dest(svc, daddr, dport); | |
631 | if (dest) | |
632 | atomic_inc(&dest->refcnt); | |
633 | ip_vs_service_put(svc); | |
634 | return dest; | |
635 | } | |
1da177e4 LT |
636 | |
637 | /* | |
638 | * Lookup dest by {svc,addr,port} in the destination trash. | |
639 | * The destination trash is used to hold the destinations that are removed | |
640 | * from the service table but are still referenced by some conn entries. | |
641 | * The reason to add the destination trash is when the dest is temporary | |
642 | * down (either by administrator or by monitor program), the dest can be | |
643 | * picked back from the trash, the remaining connections to the dest can | |
644 | * continue, and the counting information of the dest is also useful for | |
645 | * scheduling. | |
646 | */ | |
647 | static struct ip_vs_dest * | |
7937df15 JV |
648 | ip_vs_trash_get_dest(struct ip_vs_service *svc, const union nf_inet_addr *daddr, |
649 | __be16 dport) | |
1da177e4 LT |
650 | { |
651 | struct ip_vs_dest *dest, *nxt; | |
f2431e6e | 652 | struct netns_ipvs *ipvs = net_ipvs(svc->net); |
1da177e4 LT |
653 | |
654 | /* | |
655 | * Find the destination in trash | |
656 | */ | |
f2431e6e | 657 | list_for_each_entry_safe(dest, nxt, &ipvs->dest_trash, n_list) { |
7937df15 JV |
658 | IP_VS_DBG_BUF(3, "Destination %u/%s:%u still in trash, " |
659 | "dest->refcnt=%d\n", | |
660 | dest->vfwmark, | |
661 | IP_VS_DBG_ADDR(svc->af, &dest->addr), | |
662 | ntohs(dest->port), | |
663 | atomic_read(&dest->refcnt)); | |
664 | if (dest->af == svc->af && | |
665 | ip_vs_addr_equal(svc->af, &dest->addr, daddr) && | |
1da177e4 LT |
666 | dest->port == dport && |
667 | dest->vfwmark == svc->fwmark && | |
668 | dest->protocol == svc->protocol && | |
669 | (svc->fwmark || | |
7937df15 | 670 | (ip_vs_addr_equal(svc->af, &dest->vaddr, &svc->addr) && |
1da177e4 LT |
671 | dest->vport == svc->port))) { |
672 | /* HIT */ | |
673 | return dest; | |
674 | } | |
675 | ||
676 | /* | |
677 | * Try to purge the destination from trash if not referenced | |
678 | */ | |
679 | if (atomic_read(&dest->refcnt) == 1) { | |
7937df15 JV |
680 | IP_VS_DBG_BUF(3, "Removing destination %u/%s:%u " |
681 | "from trash\n", | |
682 | dest->vfwmark, | |
683 | IP_VS_DBG_ADDR(svc->af, &dest->addr), | |
684 | ntohs(dest->port)); | |
1da177e4 LT |
685 | list_del(&dest->n_list); |
686 | ip_vs_dst_reset(dest); | |
687 | __ip_vs_unbind_svc(dest); | |
b17fc996 | 688 | free_percpu(dest->stats.cpustats); |
1da177e4 LT |
689 | kfree(dest); |
690 | } | |
691 | } | |
692 | ||
693 | return NULL; | |
694 | } | |
695 | ||
696 | ||
697 | /* | |
698 | * Clean up all the destinations in the trash | |
699 | * Called by the ip_vs_control_cleanup() | |
700 | * | |
701 | * When the ip_vs_control_clearup is activated by ipvs module exit, | |
702 | * the service tables must have been flushed and all the connections | |
703 | * are expired, and the refcnt of each destination in the trash must | |
704 | * be 1, so we simply release them here. | |
705 | */ | |
f2431e6e | 706 | static void ip_vs_trash_cleanup(struct net *net) |
1da177e4 LT |
707 | { |
708 | struct ip_vs_dest *dest, *nxt; | |
f2431e6e | 709 | struct netns_ipvs *ipvs = net_ipvs(net); |
1da177e4 | 710 | |
f2431e6e | 711 | list_for_each_entry_safe(dest, nxt, &ipvs->dest_trash, n_list) { |
1da177e4 LT |
712 | list_del(&dest->n_list); |
713 | ip_vs_dst_reset(dest); | |
714 | __ip_vs_unbind_svc(dest); | |
b17fc996 | 715 | free_percpu(dest->stats.cpustats); |
1da177e4 LT |
716 | kfree(dest); |
717 | } | |
718 | } | |
719 | ||
55a3d4e1 JA |
720 | static void |
721 | ip_vs_copy_stats(struct ip_vs_stats_user *dst, struct ip_vs_stats *src) | |
722 | { | |
723 | #define IP_VS_SHOW_STATS_COUNTER(c) dst->c = src->ustats.c - src->ustats0.c | |
55a3d4e1 JA |
724 | |
725 | spin_lock_bh(&src->lock); | |
726 | ||
727 | IP_VS_SHOW_STATS_COUNTER(conns); | |
728 | IP_VS_SHOW_STATS_COUNTER(inpkts); | |
729 | IP_VS_SHOW_STATS_COUNTER(outpkts); | |
730 | IP_VS_SHOW_STATS_COUNTER(inbytes); | |
731 | IP_VS_SHOW_STATS_COUNTER(outbytes); | |
732 | ||
ea9f22cc | 733 | ip_vs_read_estimator(dst, src); |
55a3d4e1 JA |
734 | |
735 | spin_unlock_bh(&src->lock); | |
736 | } | |
1da177e4 LT |
737 | |
738 | static void | |
739 | ip_vs_zero_stats(struct ip_vs_stats *stats) | |
740 | { | |
741 | spin_lock_bh(&stats->lock); | |
e93615d0 | 742 | |
55a3d4e1 JA |
743 | /* get current counters as zero point, rates are zeroed */ |
744 | ||
745 | #define IP_VS_ZERO_STATS_COUNTER(c) stats->ustats0.c = stats->ustats.c | |
55a3d4e1 JA |
746 | |
747 | IP_VS_ZERO_STATS_COUNTER(conns); | |
748 | IP_VS_ZERO_STATS_COUNTER(inpkts); | |
749 | IP_VS_ZERO_STATS_COUNTER(outpkts); | |
750 | IP_VS_ZERO_STATS_COUNTER(inbytes); | |
751 | IP_VS_ZERO_STATS_COUNTER(outbytes); | |
752 | ||
1da177e4 | 753 | ip_vs_zero_estimator(stats); |
e93615d0 | 754 | |
3a14a313 | 755 | spin_unlock_bh(&stats->lock); |
1da177e4 LT |
756 | } |
757 | ||
758 | /* | |
759 | * Update a destination in the given service | |
760 | */ | |
761 | static void | |
26c15cfd JA |
762 | __ip_vs_update_dest(struct ip_vs_service *svc, struct ip_vs_dest *dest, |
763 | struct ip_vs_dest_user_kern *udest, int add) | |
1da177e4 | 764 | { |
fc723250 | 765 | struct netns_ipvs *ipvs = net_ipvs(svc->net); |
1da177e4 LT |
766 | int conn_flags; |
767 | ||
768 | /* set the weight and the flags */ | |
769 | atomic_set(&dest->weight, udest->weight); | |
3575792e JA |
770 | conn_flags = udest->conn_flags & IP_VS_CONN_F_DEST_MASK; |
771 | conn_flags |= IP_VS_CONN_F_INACTIVE; | |
1da177e4 | 772 | |
1da177e4 | 773 | /* set the IP_VS_CONN_F_NOOUTPUT flag if not masquerading/NAT */ |
3575792e | 774 | if ((conn_flags & IP_VS_CONN_F_FWD_MASK) != IP_VS_CONN_F_MASQ) { |
1da177e4 LT |
775 | conn_flags |= IP_VS_CONN_F_NOOUTPUT; |
776 | } else { | |
777 | /* | |
fc723250 | 778 | * Put the real service in rs_table if not present. |
1da177e4 LT |
779 | * For now only for NAT! |
780 | */ | |
a0840e2e | 781 | write_lock_bh(&ipvs->rs_lock); |
fc723250 | 782 | ip_vs_rs_hash(ipvs, dest); |
a0840e2e | 783 | write_unlock_bh(&ipvs->rs_lock); |
1da177e4 LT |
784 | } |
785 | atomic_set(&dest->conn_flags, conn_flags); | |
786 | ||
787 | /* bind the service */ | |
788 | if (!dest->svc) { | |
789 | __ip_vs_bind_svc(dest, svc); | |
790 | } else { | |
791 | if (dest->svc != svc) { | |
792 | __ip_vs_unbind_svc(dest); | |
793 | ip_vs_zero_stats(&dest->stats); | |
794 | __ip_vs_bind_svc(dest, svc); | |
795 | } | |
796 | } | |
797 | ||
798 | /* set the dest status flags */ | |
799 | dest->flags |= IP_VS_DEST_F_AVAILABLE; | |
800 | ||
801 | if (udest->u_threshold == 0 || udest->u_threshold > dest->u_threshold) | |
802 | dest->flags &= ~IP_VS_DEST_F_OVERLOAD; | |
803 | dest->u_threshold = udest->u_threshold; | |
804 | dest->l_threshold = udest->l_threshold; | |
26c15cfd | 805 | |
ff75f40f | 806 | spin_lock_bh(&dest->dst_lock); |
fc604767 | 807 | ip_vs_dst_reset(dest); |
ff75f40f | 808 | spin_unlock_bh(&dest->dst_lock); |
fc604767 | 809 | |
26c15cfd | 810 | if (add) |
6ef757f9 | 811 | ip_vs_start_estimator(svc->net, &dest->stats); |
26c15cfd JA |
812 | |
813 | write_lock_bh(&__ip_vs_svc_lock); | |
814 | ||
815 | /* Wait until all other svc users go away */ | |
816 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 0); | |
817 | ||
818 | if (add) { | |
819 | list_add(&dest->n_list, &svc->destinations); | |
820 | svc->num_dests++; | |
821 | } | |
822 | ||
823 | /* call the update_service, because server weight may be changed */ | |
824 | if (svc->scheduler->update_service) | |
825 | svc->scheduler->update_service(svc); | |
826 | ||
827 | write_unlock_bh(&__ip_vs_svc_lock); | |
1da177e4 LT |
828 | } |
829 | ||
830 | ||
831 | /* | |
832 | * Create a destination for the given service | |
833 | */ | |
834 | static int | |
c860c6b1 | 835 | ip_vs_new_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest, |
1da177e4 LT |
836 | struct ip_vs_dest **dest_p) |
837 | { | |
838 | struct ip_vs_dest *dest; | |
839 | unsigned atype; | |
840 | ||
841 | EnterFunction(2); | |
842 | ||
09571c7a VB |
843 | #ifdef CONFIG_IP_VS_IPV6 |
844 | if (svc->af == AF_INET6) { | |
845 | atype = ipv6_addr_type(&udest->addr.in6); | |
3bfb92f4 SW |
846 | if ((!(atype & IPV6_ADDR_UNICAST) || |
847 | atype & IPV6_ADDR_LINKLOCAL) && | |
4a98480b | 848 | !__ip_vs_addr_is_local_v6(svc->net, &udest->addr.in6)) |
09571c7a VB |
849 | return -EINVAL; |
850 | } else | |
851 | #endif | |
852 | { | |
4a98480b | 853 | atype = inet_addr_type(svc->net, udest->addr.ip); |
09571c7a VB |
854 | if (atype != RTN_LOCAL && atype != RTN_UNICAST) |
855 | return -EINVAL; | |
856 | } | |
1da177e4 | 857 | |
dee06e47 | 858 | dest = kzalloc(sizeof(struct ip_vs_dest), GFP_KERNEL); |
0a9ee813 | 859 | if (dest == NULL) |
1da177e4 | 860 | return -ENOMEM; |
0a9ee813 | 861 | |
b17fc996 | 862 | dest->stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats); |
0a9ee813 | 863 | if (!dest->stats.cpustats) |
b17fc996 | 864 | goto err_alloc; |
1da177e4 | 865 | |
c860c6b1 | 866 | dest->af = svc->af; |
1da177e4 | 867 | dest->protocol = svc->protocol; |
c860c6b1 | 868 | dest->vaddr = svc->addr; |
1da177e4 LT |
869 | dest->vport = svc->port; |
870 | dest->vfwmark = svc->fwmark; | |
c860c6b1 | 871 | ip_vs_addr_copy(svc->af, &dest->addr, &udest->addr); |
1da177e4 LT |
872 | dest->port = udest->port; |
873 | ||
874 | atomic_set(&dest->activeconns, 0); | |
875 | atomic_set(&dest->inactconns, 0); | |
876 | atomic_set(&dest->persistconns, 0); | |
26c15cfd | 877 | atomic_set(&dest->refcnt, 1); |
1da177e4 LT |
878 | |
879 | INIT_LIST_HEAD(&dest->d_list); | |
880 | spin_lock_init(&dest->dst_lock); | |
881 | spin_lock_init(&dest->stats.lock); | |
26c15cfd | 882 | __ip_vs_update_dest(svc, dest, udest, 1); |
1da177e4 LT |
883 | |
884 | *dest_p = dest; | |
885 | ||
886 | LeaveFunction(2); | |
887 | return 0; | |
b17fc996 HS |
888 | |
889 | err_alloc: | |
890 | kfree(dest); | |
891 | return -ENOMEM; | |
1da177e4 LT |
892 | } |
893 | ||
894 | ||
895 | /* | |
896 | * Add a destination into an existing service | |
897 | */ | |
898 | static int | |
c860c6b1 | 899 | ip_vs_add_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest) |
1da177e4 LT |
900 | { |
901 | struct ip_vs_dest *dest; | |
c860c6b1 | 902 | union nf_inet_addr daddr; |
014d730d | 903 | __be16 dport = udest->port; |
1da177e4 LT |
904 | int ret; |
905 | ||
906 | EnterFunction(2); | |
907 | ||
908 | if (udest->weight < 0) { | |
1e3e238e | 909 | pr_err("%s(): server weight less than zero\n", __func__); |
1da177e4 LT |
910 | return -ERANGE; |
911 | } | |
912 | ||
913 | if (udest->l_threshold > udest->u_threshold) { | |
1e3e238e HE |
914 | pr_err("%s(): lower threshold is higher than upper threshold\n", |
915 | __func__); | |
1da177e4 LT |
916 | return -ERANGE; |
917 | } | |
918 | ||
c860c6b1 JV |
919 | ip_vs_addr_copy(svc->af, &daddr, &udest->addr); |
920 | ||
1da177e4 LT |
921 | /* |
922 | * Check if the dest already exists in the list | |
923 | */ | |
7937df15 JV |
924 | dest = ip_vs_lookup_dest(svc, &daddr, dport); |
925 | ||
1da177e4 | 926 | if (dest != NULL) { |
1e3e238e | 927 | IP_VS_DBG(1, "%s(): dest already exists\n", __func__); |
1da177e4 LT |
928 | return -EEXIST; |
929 | } | |
930 | ||
931 | /* | |
932 | * Check if the dest already exists in the trash and | |
933 | * is from the same service | |
934 | */ | |
7937df15 JV |
935 | dest = ip_vs_trash_get_dest(svc, &daddr, dport); |
936 | ||
1da177e4 | 937 | if (dest != NULL) { |
cfc78c5a JV |
938 | IP_VS_DBG_BUF(3, "Get destination %s:%u from trash, " |
939 | "dest->refcnt=%d, service %u/%s:%u\n", | |
940 | IP_VS_DBG_ADDR(svc->af, &daddr), ntohs(dport), | |
941 | atomic_read(&dest->refcnt), | |
942 | dest->vfwmark, | |
943 | IP_VS_DBG_ADDR(svc->af, &dest->vaddr), | |
944 | ntohs(dest->vport)); | |
945 | ||
1da177e4 LT |
946 | /* |
947 | * Get the destination from the trash | |
948 | */ | |
949 | list_del(&dest->n_list); | |
950 | ||
26c15cfd JA |
951 | __ip_vs_update_dest(svc, dest, udest, 1); |
952 | ret = 0; | |
953 | } else { | |
1da177e4 | 954 | /* |
26c15cfd | 955 | * Allocate and initialize the dest structure |
1da177e4 | 956 | */ |
26c15cfd | 957 | ret = ip_vs_new_dest(svc, udest, &dest); |
1da177e4 | 958 | } |
1da177e4 LT |
959 | LeaveFunction(2); |
960 | ||
26c15cfd | 961 | return ret; |
1da177e4 LT |
962 | } |
963 | ||
964 | ||
965 | /* | |
966 | * Edit a destination in the given service | |
967 | */ | |
968 | static int | |
c860c6b1 | 969 | ip_vs_edit_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest) |
1da177e4 LT |
970 | { |
971 | struct ip_vs_dest *dest; | |
c860c6b1 | 972 | union nf_inet_addr daddr; |
014d730d | 973 | __be16 dport = udest->port; |
1da177e4 LT |
974 | |
975 | EnterFunction(2); | |
976 | ||
977 | if (udest->weight < 0) { | |
1e3e238e | 978 | pr_err("%s(): server weight less than zero\n", __func__); |
1da177e4 LT |
979 | return -ERANGE; |
980 | } | |
981 | ||
982 | if (udest->l_threshold > udest->u_threshold) { | |
1e3e238e HE |
983 | pr_err("%s(): lower threshold is higher than upper threshold\n", |
984 | __func__); | |
1da177e4 LT |
985 | return -ERANGE; |
986 | } | |
987 | ||
c860c6b1 JV |
988 | ip_vs_addr_copy(svc->af, &daddr, &udest->addr); |
989 | ||
1da177e4 LT |
990 | /* |
991 | * Lookup the destination list | |
992 | */ | |
7937df15 JV |
993 | dest = ip_vs_lookup_dest(svc, &daddr, dport); |
994 | ||
1da177e4 | 995 | if (dest == NULL) { |
1e3e238e | 996 | IP_VS_DBG(1, "%s(): dest doesn't exist\n", __func__); |
1da177e4 LT |
997 | return -ENOENT; |
998 | } | |
999 | ||
26c15cfd | 1000 | __ip_vs_update_dest(svc, dest, udest, 0); |
1da177e4 LT |
1001 | LeaveFunction(2); |
1002 | ||
1003 | return 0; | |
1004 | } | |
1005 | ||
1006 | ||
1007 | /* | |
1008 | * Delete a destination (must be already unlinked from the service) | |
1009 | */ | |
29c2026f | 1010 | static void __ip_vs_del_dest(struct net *net, struct ip_vs_dest *dest) |
1da177e4 | 1011 | { |
a0840e2e HS |
1012 | struct netns_ipvs *ipvs = net_ipvs(net); |
1013 | ||
6ef757f9 | 1014 | ip_vs_stop_estimator(net, &dest->stats); |
1da177e4 LT |
1015 | |
1016 | /* | |
1017 | * Remove it from the d-linked list with the real services. | |
1018 | */ | |
a0840e2e | 1019 | write_lock_bh(&ipvs->rs_lock); |
1da177e4 | 1020 | ip_vs_rs_unhash(dest); |
a0840e2e | 1021 | write_unlock_bh(&ipvs->rs_lock); |
1da177e4 LT |
1022 | |
1023 | /* | |
1024 | * Decrease the refcnt of the dest, and free the dest | |
1025 | * if nobody refers to it (refcnt=0). Otherwise, throw | |
1026 | * the destination into the trash. | |
1027 | */ | |
1028 | if (atomic_dec_and_test(&dest->refcnt)) { | |
26c15cfd JA |
1029 | IP_VS_DBG_BUF(3, "Removing destination %u/%s:%u\n", |
1030 | dest->vfwmark, | |
1031 | IP_VS_DBG_ADDR(dest->af, &dest->addr), | |
1032 | ntohs(dest->port)); | |
1da177e4 LT |
1033 | ip_vs_dst_reset(dest); |
1034 | /* simply decrease svc->refcnt here, let the caller check | |
1035 | and release the service if nobody refers to it. | |
1036 | Only user context can release destination and service, | |
1037 | and only one user context can update virtual service at a | |
1038 | time, so the operation here is OK */ | |
1039 | atomic_dec(&dest->svc->refcnt); | |
b17fc996 | 1040 | free_percpu(dest->stats.cpustats); |
1da177e4 LT |
1041 | kfree(dest); |
1042 | } else { | |
cfc78c5a JV |
1043 | IP_VS_DBG_BUF(3, "Moving dest %s:%u into trash, " |
1044 | "dest->refcnt=%d\n", | |
1045 | IP_VS_DBG_ADDR(dest->af, &dest->addr), | |
1046 | ntohs(dest->port), | |
1047 | atomic_read(&dest->refcnt)); | |
f2431e6e | 1048 | list_add(&dest->n_list, &ipvs->dest_trash); |
1da177e4 LT |
1049 | atomic_inc(&dest->refcnt); |
1050 | } | |
1051 | } | |
1052 | ||
1053 | ||
1054 | /* | |
1055 | * Unlink a destination from the given service | |
1056 | */ | |
1057 | static void __ip_vs_unlink_dest(struct ip_vs_service *svc, | |
1058 | struct ip_vs_dest *dest, | |
1059 | int svcupd) | |
1060 | { | |
1061 | dest->flags &= ~IP_VS_DEST_F_AVAILABLE; | |
1062 | ||
1063 | /* | |
1064 | * Remove it from the d-linked destination list. | |
1065 | */ | |
1066 | list_del(&dest->n_list); | |
1067 | svc->num_dests--; | |
82dfb6f3 SW |
1068 | |
1069 | /* | |
1070 | * Call the update_service function of its scheduler | |
1071 | */ | |
1072 | if (svcupd && svc->scheduler->update_service) | |
1073 | svc->scheduler->update_service(svc); | |
1da177e4 LT |
1074 | } |
1075 | ||
1076 | ||
1077 | /* | |
1078 | * Delete a destination server in the given service | |
1079 | */ | |
1080 | static int | |
c860c6b1 | 1081 | ip_vs_del_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest) |
1da177e4 LT |
1082 | { |
1083 | struct ip_vs_dest *dest; | |
014d730d | 1084 | __be16 dport = udest->port; |
1da177e4 LT |
1085 | |
1086 | EnterFunction(2); | |
1087 | ||
7937df15 | 1088 | dest = ip_vs_lookup_dest(svc, &udest->addr, dport); |
c860c6b1 | 1089 | |
1da177e4 | 1090 | if (dest == NULL) { |
1e3e238e | 1091 | IP_VS_DBG(1, "%s(): destination not found!\n", __func__); |
1da177e4 LT |
1092 | return -ENOENT; |
1093 | } | |
1094 | ||
1095 | write_lock_bh(&__ip_vs_svc_lock); | |
1096 | ||
1097 | /* | |
1098 | * Wait until all other svc users go away. | |
1099 | */ | |
26c15cfd | 1100 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 0); |
1da177e4 LT |
1101 | |
1102 | /* | |
1103 | * Unlink dest from the service | |
1104 | */ | |
1105 | __ip_vs_unlink_dest(svc, dest, 1); | |
1106 | ||
1107 | write_unlock_bh(&__ip_vs_svc_lock); | |
1108 | ||
1109 | /* | |
1110 | * Delete the destination | |
1111 | */ | |
a0840e2e | 1112 | __ip_vs_del_dest(svc->net, dest); |
1da177e4 LT |
1113 | |
1114 | LeaveFunction(2); | |
1115 | ||
1116 | return 0; | |
1117 | } | |
1118 | ||
1119 | ||
1120 | /* | |
1121 | * Add a service into the service hash table | |
1122 | */ | |
1123 | static int | |
fc723250 | 1124 | ip_vs_add_service(struct net *net, struct ip_vs_service_user_kern *u, |
c860c6b1 | 1125 | struct ip_vs_service **svc_p) |
1da177e4 LT |
1126 | { |
1127 | int ret = 0; | |
1128 | struct ip_vs_scheduler *sched = NULL; | |
0d1e71b0 | 1129 | struct ip_vs_pe *pe = NULL; |
1da177e4 | 1130 | struct ip_vs_service *svc = NULL; |
a0840e2e | 1131 | struct netns_ipvs *ipvs = net_ipvs(net); |
1da177e4 LT |
1132 | |
1133 | /* increase the module use count */ | |
1134 | ip_vs_use_count_inc(); | |
1135 | ||
1136 | /* Lookup the scheduler by 'u->sched_name' */ | |
1137 | sched = ip_vs_scheduler_get(u->sched_name); | |
1138 | if (sched == NULL) { | |
1e3e238e | 1139 | pr_info("Scheduler module ip_vs_%s not found\n", u->sched_name); |
1da177e4 | 1140 | ret = -ENOENT; |
6e08bfb8 | 1141 | goto out_err; |
1da177e4 LT |
1142 | } |
1143 | ||
0d1e71b0 | 1144 | if (u->pe_name && *u->pe_name) { |
e9e5eee8 | 1145 | pe = ip_vs_pe_getbyname(u->pe_name); |
0d1e71b0 SH |
1146 | if (pe == NULL) { |
1147 | pr_info("persistence engine module ip_vs_pe_%s " | |
1148 | "not found\n", u->pe_name); | |
1149 | ret = -ENOENT; | |
1150 | goto out_err; | |
1151 | } | |
1152 | } | |
1153 | ||
f94fd041 | 1154 | #ifdef CONFIG_IP_VS_IPV6 |
48148938 JV |
1155 | if (u->af == AF_INET6 && (u->netmask < 1 || u->netmask > 128)) { |
1156 | ret = -EINVAL; | |
1157 | goto out_err; | |
f94fd041 JV |
1158 | } |
1159 | #endif | |
1160 | ||
dee06e47 | 1161 | svc = kzalloc(sizeof(struct ip_vs_service), GFP_KERNEL); |
1da177e4 | 1162 | if (svc == NULL) { |
1e3e238e | 1163 | IP_VS_DBG(1, "%s(): no memory\n", __func__); |
1da177e4 LT |
1164 | ret = -ENOMEM; |
1165 | goto out_err; | |
1166 | } | |
b17fc996 | 1167 | svc->stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats); |
0a9ee813 | 1168 | if (!svc->stats.cpustats) |
b17fc996 | 1169 | goto out_err; |
1da177e4 LT |
1170 | |
1171 | /* I'm the first user of the service */ | |
26c15cfd | 1172 | atomic_set(&svc->usecnt, 0); |
1da177e4 LT |
1173 | atomic_set(&svc->refcnt, 0); |
1174 | ||
c860c6b1 | 1175 | svc->af = u->af; |
1da177e4 | 1176 | svc->protocol = u->protocol; |
c860c6b1 | 1177 | ip_vs_addr_copy(svc->af, &svc->addr, &u->addr); |
1da177e4 LT |
1178 | svc->port = u->port; |
1179 | svc->fwmark = u->fwmark; | |
1180 | svc->flags = u->flags; | |
1181 | svc->timeout = u->timeout * HZ; | |
1182 | svc->netmask = u->netmask; | |
fc723250 | 1183 | svc->net = net; |
1da177e4 LT |
1184 | |
1185 | INIT_LIST_HEAD(&svc->destinations); | |
1186 | rwlock_init(&svc->sched_lock); | |
1187 | spin_lock_init(&svc->stats.lock); | |
1188 | ||
1189 | /* Bind the scheduler */ | |
1190 | ret = ip_vs_bind_scheduler(svc, sched); | |
1191 | if (ret) | |
1192 | goto out_err; | |
1193 | sched = NULL; | |
1194 | ||
0d1e71b0 SH |
1195 | /* Bind the ct retriever */ |
1196 | ip_vs_bind_pe(svc, pe); | |
1197 | pe = NULL; | |
1198 | ||
1da177e4 LT |
1199 | /* Update the virtual service counters */ |
1200 | if (svc->port == FTPPORT) | |
763f8d0e | 1201 | atomic_inc(&ipvs->ftpsvc_counter); |
1da177e4 | 1202 | else if (svc->port == 0) |
763f8d0e | 1203 | atomic_inc(&ipvs->nullsvc_counter); |
1da177e4 | 1204 | |
6ef757f9 | 1205 | ip_vs_start_estimator(net, &svc->stats); |
f94fd041 JV |
1206 | |
1207 | /* Count only IPv4 services for old get/setsockopt interface */ | |
1208 | if (svc->af == AF_INET) | |
a0840e2e | 1209 | ipvs->num_services++; |
1da177e4 LT |
1210 | |
1211 | /* Hash the service into the service table */ | |
1212 | write_lock_bh(&__ip_vs_svc_lock); | |
1213 | ip_vs_svc_hash(svc); | |
1214 | write_unlock_bh(&__ip_vs_svc_lock); | |
1215 | ||
1216 | *svc_p = svc; | |
7a4f0761 HS |
1217 | /* Now there is a service - full throttle */ |
1218 | ipvs->enable = 1; | |
1da177e4 LT |
1219 | return 0; |
1220 | ||
b17fc996 | 1221 | |
6e08bfb8 | 1222 | out_err: |
1da177e4 | 1223 | if (svc != NULL) { |
2fabf35b | 1224 | ip_vs_unbind_scheduler(svc); |
1da177e4 LT |
1225 | if (svc->inc) { |
1226 | local_bh_disable(); | |
1227 | ip_vs_app_inc_put(svc->inc); | |
1228 | local_bh_enable(); | |
1229 | } | |
b17fc996 HS |
1230 | if (svc->stats.cpustats) |
1231 | free_percpu(svc->stats.cpustats); | |
1da177e4 LT |
1232 | kfree(svc); |
1233 | } | |
1234 | ip_vs_scheduler_put(sched); | |
0d1e71b0 | 1235 | ip_vs_pe_put(pe); |
1da177e4 | 1236 | |
1da177e4 LT |
1237 | /* decrease the module use count */ |
1238 | ip_vs_use_count_dec(); | |
1239 | ||
1240 | return ret; | |
1241 | } | |
1242 | ||
1243 | ||
1244 | /* | |
1245 | * Edit a service and bind it with a new scheduler | |
1246 | */ | |
1247 | static int | |
c860c6b1 | 1248 | ip_vs_edit_service(struct ip_vs_service *svc, struct ip_vs_service_user_kern *u) |
1da177e4 LT |
1249 | { |
1250 | struct ip_vs_scheduler *sched, *old_sched; | |
0d1e71b0 | 1251 | struct ip_vs_pe *pe = NULL, *old_pe = NULL; |
1da177e4 LT |
1252 | int ret = 0; |
1253 | ||
1254 | /* | |
1255 | * Lookup the scheduler, by 'u->sched_name' | |
1256 | */ | |
1257 | sched = ip_vs_scheduler_get(u->sched_name); | |
1258 | if (sched == NULL) { | |
1e3e238e | 1259 | pr_info("Scheduler module ip_vs_%s not found\n", u->sched_name); |
1da177e4 LT |
1260 | return -ENOENT; |
1261 | } | |
1262 | old_sched = sched; | |
1263 | ||
0d1e71b0 | 1264 | if (u->pe_name && *u->pe_name) { |
e9e5eee8 | 1265 | pe = ip_vs_pe_getbyname(u->pe_name); |
0d1e71b0 SH |
1266 | if (pe == NULL) { |
1267 | pr_info("persistence engine module ip_vs_pe_%s " | |
1268 | "not found\n", u->pe_name); | |
1269 | ret = -ENOENT; | |
1270 | goto out; | |
1271 | } | |
1272 | old_pe = pe; | |
1273 | } | |
1274 | ||
f94fd041 | 1275 | #ifdef CONFIG_IP_VS_IPV6 |
48148938 JV |
1276 | if (u->af == AF_INET6 && (u->netmask < 1 || u->netmask > 128)) { |
1277 | ret = -EINVAL; | |
1278 | goto out; | |
f94fd041 JV |
1279 | } |
1280 | #endif | |
1281 | ||
1da177e4 LT |
1282 | write_lock_bh(&__ip_vs_svc_lock); |
1283 | ||
1284 | /* | |
1285 | * Wait until all other svc users go away. | |
1286 | */ | |
26c15cfd | 1287 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 0); |
1da177e4 LT |
1288 | |
1289 | /* | |
1290 | * Set the flags and timeout value | |
1291 | */ | |
1292 | svc->flags = u->flags | IP_VS_SVC_F_HASHED; | |
1293 | svc->timeout = u->timeout * HZ; | |
1294 | svc->netmask = u->netmask; | |
1295 | ||
1296 | old_sched = svc->scheduler; | |
1297 | if (sched != old_sched) { | |
1298 | /* | |
1299 | * Unbind the old scheduler | |
1300 | */ | |
1301 | if ((ret = ip_vs_unbind_scheduler(svc))) { | |
1302 | old_sched = sched; | |
9e691ed6 | 1303 | goto out_unlock; |
1da177e4 LT |
1304 | } |
1305 | ||
1306 | /* | |
1307 | * Bind the new scheduler | |
1308 | */ | |
1309 | if ((ret = ip_vs_bind_scheduler(svc, sched))) { | |
1310 | /* | |
1311 | * If ip_vs_bind_scheduler fails, restore the old | |
1312 | * scheduler. | |
1313 | * The main reason of failure is out of memory. | |
1314 | * | |
1315 | * The question is if the old scheduler can be | |
1316 | * restored all the time. TODO: if it cannot be | |
1317 | * restored some time, we must delete the service, | |
1318 | * otherwise the system may crash. | |
1319 | */ | |
1320 | ip_vs_bind_scheduler(svc, old_sched); | |
1321 | old_sched = sched; | |
9e691ed6 | 1322 | goto out_unlock; |
1da177e4 LT |
1323 | } |
1324 | } | |
1325 | ||
0d1e71b0 SH |
1326 | old_pe = svc->pe; |
1327 | if (pe != old_pe) { | |
1328 | ip_vs_unbind_pe(svc); | |
1329 | ip_vs_bind_pe(svc, pe); | |
1330 | } | |
1331 | ||
552ad65a | 1332 | out_unlock: |
1da177e4 | 1333 | write_unlock_bh(&__ip_vs_svc_lock); |
552ad65a | 1334 | out: |
6e08bfb8 | 1335 | ip_vs_scheduler_put(old_sched); |
0d1e71b0 | 1336 | ip_vs_pe_put(old_pe); |
1da177e4 LT |
1337 | return ret; |
1338 | } | |
1339 | ||
1340 | ||
1341 | /* | |
1342 | * Delete a service from the service list | |
1343 | * - The service must be unlinked, unlocked and not referenced! | |
1344 | * - We are called under _bh lock | |
1345 | */ | |
1346 | static void __ip_vs_del_service(struct ip_vs_service *svc) | |
1347 | { | |
1348 | struct ip_vs_dest *dest, *nxt; | |
1349 | struct ip_vs_scheduler *old_sched; | |
0d1e71b0 | 1350 | struct ip_vs_pe *old_pe; |
a0840e2e | 1351 | struct netns_ipvs *ipvs = net_ipvs(svc->net); |
0d1e71b0 SH |
1352 | |
1353 | pr_info("%s: enter\n", __func__); | |
1da177e4 | 1354 | |
f94fd041 JV |
1355 | /* Count only IPv4 services for old get/setsockopt interface */ |
1356 | if (svc->af == AF_INET) | |
a0840e2e | 1357 | ipvs->num_services--; |
f94fd041 | 1358 | |
6ef757f9 | 1359 | ip_vs_stop_estimator(svc->net, &svc->stats); |
1da177e4 LT |
1360 | |
1361 | /* Unbind scheduler */ | |
1362 | old_sched = svc->scheduler; | |
1363 | ip_vs_unbind_scheduler(svc); | |
6e08bfb8 | 1364 | ip_vs_scheduler_put(old_sched); |
1da177e4 | 1365 | |
0d1e71b0 SH |
1366 | /* Unbind persistence engine */ |
1367 | old_pe = svc->pe; | |
1368 | ip_vs_unbind_pe(svc); | |
1369 | ip_vs_pe_put(old_pe); | |
1370 | ||
1da177e4 LT |
1371 | /* Unbind app inc */ |
1372 | if (svc->inc) { | |
1373 | ip_vs_app_inc_put(svc->inc); | |
1374 | svc->inc = NULL; | |
1375 | } | |
1376 | ||
1377 | /* | |
1378 | * Unlink the whole destination list | |
1379 | */ | |
1380 | list_for_each_entry_safe(dest, nxt, &svc->destinations, n_list) { | |
1381 | __ip_vs_unlink_dest(svc, dest, 0); | |
29c2026f | 1382 | __ip_vs_del_dest(svc->net, dest); |
1da177e4 LT |
1383 | } |
1384 | ||
1385 | /* | |
1386 | * Update the virtual service counters | |
1387 | */ | |
1388 | if (svc->port == FTPPORT) | |
763f8d0e | 1389 | atomic_dec(&ipvs->ftpsvc_counter); |
1da177e4 | 1390 | else if (svc->port == 0) |
763f8d0e | 1391 | atomic_dec(&ipvs->nullsvc_counter); |
1da177e4 LT |
1392 | |
1393 | /* | |
1394 | * Free the service if nobody refers to it | |
1395 | */ | |
26c15cfd JA |
1396 | if (atomic_read(&svc->refcnt) == 0) { |
1397 | IP_VS_DBG_BUF(3, "Removing service %u/%s:%u usecnt=%d\n", | |
1398 | svc->fwmark, | |
1399 | IP_VS_DBG_ADDR(svc->af, &svc->addr), | |
1400 | ntohs(svc->port), atomic_read(&svc->usecnt)); | |
b17fc996 | 1401 | free_percpu(svc->stats.cpustats); |
1da177e4 | 1402 | kfree(svc); |
26c15cfd | 1403 | } |
1da177e4 LT |
1404 | |
1405 | /* decrease the module use count */ | |
1406 | ip_vs_use_count_dec(); | |
1407 | } | |
1408 | ||
1409 | /* | |
26c15cfd | 1410 | * Unlink a service from list and try to delete it if its refcnt reached 0 |
1da177e4 | 1411 | */ |
26c15cfd | 1412 | static void ip_vs_unlink_service(struct ip_vs_service *svc) |
1da177e4 | 1413 | { |
1da177e4 LT |
1414 | /* |
1415 | * Unhash it from the service table | |
1416 | */ | |
1417 | write_lock_bh(&__ip_vs_svc_lock); | |
1418 | ||
1419 | ip_vs_svc_unhash(svc); | |
1420 | ||
1421 | /* | |
1422 | * Wait until all the svc users go away. | |
1423 | */ | |
26c15cfd | 1424 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 0); |
1da177e4 LT |
1425 | |
1426 | __ip_vs_del_service(svc); | |
1427 | ||
1428 | write_unlock_bh(&__ip_vs_svc_lock); | |
26c15cfd JA |
1429 | } |
1430 | ||
1431 | /* | |
1432 | * Delete a service from the service list | |
1433 | */ | |
1434 | static int ip_vs_del_service(struct ip_vs_service *svc) | |
1435 | { | |
1436 | if (svc == NULL) | |
1437 | return -EEXIST; | |
1438 | ip_vs_unlink_service(svc); | |
1da177e4 LT |
1439 | |
1440 | return 0; | |
1441 | } | |
1442 | ||
1443 | ||
1444 | /* | |
1445 | * Flush all the virtual services | |
1446 | */ | |
fc723250 | 1447 | static int ip_vs_flush(struct net *net) |
1da177e4 LT |
1448 | { |
1449 | int idx; | |
1450 | struct ip_vs_service *svc, *nxt; | |
1451 | ||
1452 | /* | |
fc723250 | 1453 | * Flush the service table hashed by <netns,protocol,addr,port> |
1da177e4 LT |
1454 | */ |
1455 | for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
fc723250 HS |
1456 | list_for_each_entry_safe(svc, nxt, &ip_vs_svc_table[idx], |
1457 | s_list) { | |
1458 | if (net_eq(svc->net, net)) | |
1459 | ip_vs_unlink_service(svc); | |
1da177e4 LT |
1460 | } |
1461 | } | |
1462 | ||
1463 | /* | |
1464 | * Flush the service table hashed by fwmark | |
1465 | */ | |
1466 | for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
1467 | list_for_each_entry_safe(svc, nxt, | |
1468 | &ip_vs_svc_fwm_table[idx], f_list) { | |
fc723250 HS |
1469 | if (net_eq(svc->net, net)) |
1470 | ip_vs_unlink_service(svc); | |
1da177e4 LT |
1471 | } |
1472 | } | |
1473 | ||
1474 | return 0; | |
1475 | } | |
1476 | ||
7a4f0761 HS |
1477 | /* |
1478 | * Delete service by {netns} in the service table. | |
1479 | * Called by __ip_vs_cleanup() | |
1480 | */ | |
503cf15a | 1481 | void ip_vs_service_net_cleanup(struct net *net) |
7a4f0761 HS |
1482 | { |
1483 | EnterFunction(2); | |
1484 | /* Check for "full" addressed entries */ | |
1485 | mutex_lock(&__ip_vs_mutex); | |
1486 | ip_vs_flush(net); | |
1487 | mutex_unlock(&__ip_vs_mutex); | |
1488 | LeaveFunction(2); | |
1489 | } | |
1490 | /* | |
1491 | * Release dst hold by dst_cache | |
1492 | */ | |
1493 | static inline void | |
1494 | __ip_vs_dev_reset(struct ip_vs_dest *dest, struct net_device *dev) | |
1495 | { | |
1496 | spin_lock_bh(&dest->dst_lock); | |
1497 | if (dest->dst_cache && dest->dst_cache->dev == dev) { | |
1498 | IP_VS_DBG_BUF(3, "Reset dev:%s dest %s:%u ,dest->refcnt=%d\n", | |
1499 | dev->name, | |
1500 | IP_VS_DBG_ADDR(dest->af, &dest->addr), | |
1501 | ntohs(dest->port), | |
1502 | atomic_read(&dest->refcnt)); | |
1503 | ip_vs_dst_reset(dest); | |
1504 | } | |
1505 | spin_unlock_bh(&dest->dst_lock); | |
1506 | ||
1507 | } | |
1508 | /* | |
1509 | * Netdev event receiver | |
1510 | * Currently only NETDEV_UNREGISTER is handled, i.e. if we hold a reference to | |
1511 | * a device that is "unregister" it must be released. | |
1512 | */ | |
1513 | static int ip_vs_dst_event(struct notifier_block *this, unsigned long event, | |
1514 | void *ptr) | |
1515 | { | |
1516 | struct net_device *dev = ptr; | |
1517 | struct net *net = dev_net(dev); | |
1518 | struct ip_vs_service *svc; | |
1519 | struct ip_vs_dest *dest; | |
1520 | unsigned int idx; | |
1521 | ||
1522 | if (event != NETDEV_UNREGISTER) | |
1523 | return NOTIFY_DONE; | |
1524 | IP_VS_DBG(3, "%s() dev=%s\n", __func__, dev->name); | |
1525 | EnterFunction(2); | |
1526 | mutex_lock(&__ip_vs_mutex); | |
1527 | for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
1528 | list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) { | |
1529 | if (net_eq(svc->net, net)) { | |
1530 | list_for_each_entry(dest, &svc->destinations, | |
1531 | n_list) { | |
1532 | __ip_vs_dev_reset(dest, dev); | |
1533 | } | |
1534 | } | |
1535 | } | |
1536 | ||
1537 | list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) { | |
1538 | if (net_eq(svc->net, net)) { | |
1539 | list_for_each_entry(dest, &svc->destinations, | |
1540 | n_list) { | |
1541 | __ip_vs_dev_reset(dest, dev); | |
1542 | } | |
1543 | } | |
1544 | ||
1545 | } | |
1546 | } | |
1547 | ||
1548 | list_for_each_entry(dest, &net_ipvs(net)->dest_trash, n_list) { | |
1549 | __ip_vs_dev_reset(dest, dev); | |
1550 | } | |
1551 | mutex_unlock(&__ip_vs_mutex); | |
1552 | LeaveFunction(2); | |
1553 | return NOTIFY_DONE; | |
1554 | } | |
1da177e4 LT |
1555 | |
1556 | /* | |
1557 | * Zero counters in a service or all services | |
1558 | */ | |
1559 | static int ip_vs_zero_service(struct ip_vs_service *svc) | |
1560 | { | |
1561 | struct ip_vs_dest *dest; | |
1562 | ||
1563 | write_lock_bh(&__ip_vs_svc_lock); | |
1564 | list_for_each_entry(dest, &svc->destinations, n_list) { | |
1565 | ip_vs_zero_stats(&dest->stats); | |
1566 | } | |
1567 | ip_vs_zero_stats(&svc->stats); | |
1568 | write_unlock_bh(&__ip_vs_svc_lock); | |
1569 | return 0; | |
1570 | } | |
1571 | ||
fc723250 | 1572 | static int ip_vs_zero_all(struct net *net) |
1da177e4 LT |
1573 | { |
1574 | int idx; | |
1575 | struct ip_vs_service *svc; | |
1576 | ||
1577 | for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
1578 | list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) { | |
fc723250 HS |
1579 | if (net_eq(svc->net, net)) |
1580 | ip_vs_zero_service(svc); | |
1da177e4 LT |
1581 | } |
1582 | } | |
1583 | ||
1584 | for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
1585 | list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) { | |
fc723250 HS |
1586 | if (net_eq(svc->net, net)) |
1587 | ip_vs_zero_service(svc); | |
1da177e4 LT |
1588 | } |
1589 | } | |
1590 | ||
2a0751af | 1591 | ip_vs_zero_stats(&net_ipvs(net)->tot_stats); |
1da177e4 LT |
1592 | return 0; |
1593 | } | |
1594 | ||
14e40546 | 1595 | #ifdef CONFIG_SYSCTL |
1da177e4 | 1596 | static int |
8d65af78 | 1597 | proc_do_defense_mode(ctl_table *table, int write, |
1da177e4 LT |
1598 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1599 | { | |
9330419d | 1600 | struct net *net = current->nsproxy->net_ns; |
1da177e4 LT |
1601 | int *valp = table->data; |
1602 | int val = *valp; | |
1603 | int rc; | |
1604 | ||
8d65af78 | 1605 | rc = proc_dointvec(table, write, buffer, lenp, ppos); |
1da177e4 LT |
1606 | if (write && (*valp != val)) { |
1607 | if ((*valp < 0) || (*valp > 3)) { | |
1608 | /* Restore the correct value */ | |
1609 | *valp = val; | |
1610 | } else { | |
9330419d | 1611 | update_defense_level(net_ipvs(net)); |
1da177e4 LT |
1612 | } |
1613 | } | |
1614 | return rc; | |
1615 | } | |
1616 | ||
1da177e4 | 1617 | static int |
8d65af78 | 1618 | proc_do_sync_threshold(ctl_table *table, int write, |
1da177e4 LT |
1619 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1620 | { | |
1621 | int *valp = table->data; | |
1622 | int val[2]; | |
1623 | int rc; | |
1624 | ||
1625 | /* backup the value first */ | |
1626 | memcpy(val, valp, sizeof(val)); | |
1627 | ||
8d65af78 | 1628 | rc = proc_dointvec(table, write, buffer, lenp, ppos); |
1da177e4 LT |
1629 | if (write && (valp[0] < 0 || valp[1] < 0 || valp[0] >= valp[1])) { |
1630 | /* Restore the correct value */ | |
1631 | memcpy(valp, val, sizeof(val)); | |
1632 | } | |
1633 | return rc; | |
1634 | } | |
1635 | ||
b880c1f0 HS |
1636 | static int |
1637 | proc_do_sync_mode(ctl_table *table, int write, | |
1638 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
1639 | { | |
1640 | int *valp = table->data; | |
1641 | int val = *valp; | |
1642 | int rc; | |
1643 | ||
1644 | rc = proc_dointvec(table, write, buffer, lenp, ppos); | |
1645 | if (write && (*valp != val)) { | |
1646 | if ((*valp < 0) || (*valp > 1)) { | |
1647 | /* Restore the correct value */ | |
1648 | *valp = val; | |
1649 | } else { | |
f131315f HS |
1650 | struct net *net = current->nsproxy->net_ns; |
1651 | ip_vs_sync_switch_mode(net, val); | |
b880c1f0 HS |
1652 | } |
1653 | } | |
1654 | return rc; | |
1655 | } | |
1da177e4 LT |
1656 | |
1657 | /* | |
1658 | * IPVS sysctl table (under the /proc/sys/net/ipv4/vs/) | |
a0840e2e | 1659 | * Do not change order or insert new entries without |
503cf15a | 1660 | * align with netns init in ip_vs_control_net_init() |
1da177e4 LT |
1661 | */ |
1662 | ||
1663 | static struct ctl_table vs_vars[] = { | |
1664 | { | |
1da177e4 | 1665 | .procname = "amemthresh", |
1da177e4 LT |
1666 | .maxlen = sizeof(int), |
1667 | .mode = 0644, | |
6d9f239a | 1668 | .proc_handler = proc_dointvec, |
1da177e4 | 1669 | }, |
1da177e4 | 1670 | { |
1da177e4 | 1671 | .procname = "am_droprate", |
1da177e4 LT |
1672 | .maxlen = sizeof(int), |
1673 | .mode = 0644, | |
6d9f239a | 1674 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1675 | }, |
1676 | { | |
1da177e4 | 1677 | .procname = "drop_entry", |
1da177e4 LT |
1678 | .maxlen = sizeof(int), |
1679 | .mode = 0644, | |
6d9f239a | 1680 | .proc_handler = proc_do_defense_mode, |
1da177e4 LT |
1681 | }, |
1682 | { | |
1da177e4 | 1683 | .procname = "drop_packet", |
1da177e4 LT |
1684 | .maxlen = sizeof(int), |
1685 | .mode = 0644, | |
6d9f239a | 1686 | .proc_handler = proc_do_defense_mode, |
1da177e4 | 1687 | }, |
f4bc17cd JA |
1688 | #ifdef CONFIG_IP_VS_NFCT |
1689 | { | |
1690 | .procname = "conntrack", | |
f4bc17cd JA |
1691 | .maxlen = sizeof(int), |
1692 | .mode = 0644, | |
1693 | .proc_handler = &proc_dointvec, | |
1694 | }, | |
1695 | #endif | |
1da177e4 | 1696 | { |
1da177e4 | 1697 | .procname = "secure_tcp", |
1da177e4 LT |
1698 | .maxlen = sizeof(int), |
1699 | .mode = 0644, | |
6d9f239a | 1700 | .proc_handler = proc_do_defense_mode, |
1da177e4 | 1701 | }, |
8a803040 JA |
1702 | { |
1703 | .procname = "snat_reroute", | |
8a803040 JA |
1704 | .maxlen = sizeof(int), |
1705 | .mode = 0644, | |
1706 | .proc_handler = &proc_dointvec, | |
1707 | }, | |
b880c1f0 HS |
1708 | { |
1709 | .procname = "sync_version", | |
b880c1f0 HS |
1710 | .maxlen = sizeof(int), |
1711 | .mode = 0644, | |
1712 | .proc_handler = &proc_do_sync_mode, | |
1713 | }, | |
a0840e2e HS |
1714 | { |
1715 | .procname = "cache_bypass", | |
1716 | .maxlen = sizeof(int), | |
1717 | .mode = 0644, | |
1718 | .proc_handler = proc_dointvec, | |
1719 | }, | |
1720 | { | |
1721 | .procname = "expire_nodest_conn", | |
1722 | .maxlen = sizeof(int), | |
1723 | .mode = 0644, | |
1724 | .proc_handler = proc_dointvec, | |
1725 | }, | |
1726 | { | |
1727 | .procname = "expire_quiescent_template", | |
1728 | .maxlen = sizeof(int), | |
1729 | .mode = 0644, | |
1730 | .proc_handler = proc_dointvec, | |
1731 | }, | |
1732 | { | |
1733 | .procname = "sync_threshold", | |
1734 | .maxlen = | |
1735 | sizeof(((struct netns_ipvs *)0)->sysctl_sync_threshold), | |
1736 | .mode = 0644, | |
1737 | .proc_handler = proc_do_sync_threshold, | |
1738 | }, | |
1739 | { | |
1740 | .procname = "nat_icmp_send", | |
1741 | .maxlen = sizeof(int), | |
1742 | .mode = 0644, | |
1743 | .proc_handler = proc_dointvec, | |
1744 | }, | |
1745 | #ifdef CONFIG_IP_VS_DEBUG | |
1746 | { | |
1747 | .procname = "debug_level", | |
1748 | .data = &sysctl_ip_vs_debug_level, | |
1749 | .maxlen = sizeof(int), | |
1750 | .mode = 0644, | |
1751 | .proc_handler = proc_dointvec, | |
1752 | }, | |
1753 | #endif | |
1da177e4 LT |
1754 | #if 0 |
1755 | { | |
1da177e4 LT |
1756 | .procname = "timeout_established", |
1757 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_ESTABLISHED], | |
1758 | .maxlen = sizeof(int), | |
1759 | .mode = 0644, | |
6d9f239a | 1760 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1761 | }, |
1762 | { | |
1da177e4 LT |
1763 | .procname = "timeout_synsent", |
1764 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYN_SENT], | |
1765 | .maxlen = sizeof(int), | |
1766 | .mode = 0644, | |
6d9f239a | 1767 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1768 | }, |
1769 | { | |
1da177e4 LT |
1770 | .procname = "timeout_synrecv", |
1771 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYN_RECV], | |
1772 | .maxlen = sizeof(int), | |
1773 | .mode = 0644, | |
6d9f239a | 1774 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1775 | }, |
1776 | { | |
1da177e4 LT |
1777 | .procname = "timeout_finwait", |
1778 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_FIN_WAIT], | |
1779 | .maxlen = sizeof(int), | |
1780 | .mode = 0644, | |
6d9f239a | 1781 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1782 | }, |
1783 | { | |
1da177e4 LT |
1784 | .procname = "timeout_timewait", |
1785 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_TIME_WAIT], | |
1786 | .maxlen = sizeof(int), | |
1787 | .mode = 0644, | |
6d9f239a | 1788 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1789 | }, |
1790 | { | |
1da177e4 LT |
1791 | .procname = "timeout_close", |
1792 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_CLOSE], | |
1793 | .maxlen = sizeof(int), | |
1794 | .mode = 0644, | |
6d9f239a | 1795 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1796 | }, |
1797 | { | |
1da177e4 LT |
1798 | .procname = "timeout_closewait", |
1799 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_CLOSE_WAIT], | |
1800 | .maxlen = sizeof(int), | |
1801 | .mode = 0644, | |
6d9f239a | 1802 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1803 | }, |
1804 | { | |
1da177e4 LT |
1805 | .procname = "timeout_lastack", |
1806 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_LAST_ACK], | |
1807 | .maxlen = sizeof(int), | |
1808 | .mode = 0644, | |
6d9f239a | 1809 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1810 | }, |
1811 | { | |
1da177e4 LT |
1812 | .procname = "timeout_listen", |
1813 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_LISTEN], | |
1814 | .maxlen = sizeof(int), | |
1815 | .mode = 0644, | |
6d9f239a | 1816 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1817 | }, |
1818 | { | |
1da177e4 LT |
1819 | .procname = "timeout_synack", |
1820 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYNACK], | |
1821 | .maxlen = sizeof(int), | |
1822 | .mode = 0644, | |
6d9f239a | 1823 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1824 | }, |
1825 | { | |
1da177e4 LT |
1826 | .procname = "timeout_udp", |
1827 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_UDP], | |
1828 | .maxlen = sizeof(int), | |
1829 | .mode = 0644, | |
6d9f239a | 1830 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1831 | }, |
1832 | { | |
1da177e4 LT |
1833 | .procname = "timeout_icmp", |
1834 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_ICMP], | |
1835 | .maxlen = sizeof(int), | |
1836 | .mode = 0644, | |
6d9f239a | 1837 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1838 | }, |
1839 | #endif | |
f8572d8f | 1840 | { } |
1da177e4 LT |
1841 | }; |
1842 | ||
5587da55 | 1843 | const struct ctl_path net_vs_ctl_path[] = { |
f8572d8f EB |
1844 | { .procname = "net", }, |
1845 | { .procname = "ipv4", }, | |
90754f8e PE |
1846 | { .procname = "vs", }, |
1847 | { } | |
1da177e4 | 1848 | }; |
90754f8e | 1849 | EXPORT_SYMBOL_GPL(net_vs_ctl_path); |
14e40546 | 1850 | #endif |
1da177e4 | 1851 | |
1da177e4 LT |
1852 | #ifdef CONFIG_PROC_FS |
1853 | ||
1854 | struct ip_vs_iter { | |
fc723250 | 1855 | struct seq_net_private p; /* Do not move this, netns depends upon it*/ |
1da177e4 LT |
1856 | struct list_head *table; |
1857 | int bucket; | |
1858 | }; | |
1859 | ||
1860 | /* | |
1861 | * Write the contents of the VS rule table to a PROCfs file. | |
1862 | * (It is kept just for backward compatibility) | |
1863 | */ | |
1864 | static inline const char *ip_vs_fwd_name(unsigned flags) | |
1865 | { | |
1866 | switch (flags & IP_VS_CONN_F_FWD_MASK) { | |
1867 | case IP_VS_CONN_F_LOCALNODE: | |
1868 | return "Local"; | |
1869 | case IP_VS_CONN_F_TUNNEL: | |
1870 | return "Tunnel"; | |
1871 | case IP_VS_CONN_F_DROUTE: | |
1872 | return "Route"; | |
1873 | default: | |
1874 | return "Masq"; | |
1875 | } | |
1876 | } | |
1877 | ||
1878 | ||
1879 | /* Get the Nth entry in the two lists */ | |
1880 | static struct ip_vs_service *ip_vs_info_array(struct seq_file *seq, loff_t pos) | |
1881 | { | |
fc723250 | 1882 | struct net *net = seq_file_net(seq); |
1da177e4 LT |
1883 | struct ip_vs_iter *iter = seq->private; |
1884 | int idx; | |
1885 | struct ip_vs_service *svc; | |
1886 | ||
1887 | /* look in hash by protocol */ | |
1888 | for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
1889 | list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) { | |
fc723250 | 1890 | if (net_eq(svc->net, net) && pos-- == 0) { |
1da177e4 LT |
1891 | iter->table = ip_vs_svc_table; |
1892 | iter->bucket = idx; | |
1893 | return svc; | |
1894 | } | |
1895 | } | |
1896 | } | |
1897 | ||
1898 | /* keep looking in fwmark */ | |
1899 | for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
1900 | list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) { | |
fc723250 | 1901 | if (net_eq(svc->net, net) && pos-- == 0) { |
1da177e4 LT |
1902 | iter->table = ip_vs_svc_fwm_table; |
1903 | iter->bucket = idx; | |
1904 | return svc; | |
1905 | } | |
1906 | } | |
1907 | } | |
1908 | ||
1909 | return NULL; | |
1910 | } | |
1911 | ||
1912 | static void *ip_vs_info_seq_start(struct seq_file *seq, loff_t *pos) | |
563e94f0 | 1913 | __acquires(__ip_vs_svc_lock) |
1da177e4 LT |
1914 | { |
1915 | ||
1916 | read_lock_bh(&__ip_vs_svc_lock); | |
1917 | return *pos ? ip_vs_info_array(seq, *pos - 1) : SEQ_START_TOKEN; | |
1918 | } | |
1919 | ||
1920 | ||
1921 | static void *ip_vs_info_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1922 | { | |
1923 | struct list_head *e; | |
1924 | struct ip_vs_iter *iter; | |
1925 | struct ip_vs_service *svc; | |
1926 | ||
1927 | ++*pos; | |
1928 | if (v == SEQ_START_TOKEN) | |
1929 | return ip_vs_info_array(seq,0); | |
1930 | ||
1931 | svc = v; | |
1932 | iter = seq->private; | |
1933 | ||
1934 | if (iter->table == ip_vs_svc_table) { | |
1935 | /* next service in table hashed by protocol */ | |
1936 | if ((e = svc->s_list.next) != &ip_vs_svc_table[iter->bucket]) | |
1937 | return list_entry(e, struct ip_vs_service, s_list); | |
1938 | ||
1939 | ||
1940 | while (++iter->bucket < IP_VS_SVC_TAB_SIZE) { | |
1941 | list_for_each_entry(svc,&ip_vs_svc_table[iter->bucket], | |
1942 | s_list) { | |
1943 | return svc; | |
1944 | } | |
1945 | } | |
1946 | ||
1947 | iter->table = ip_vs_svc_fwm_table; | |
1948 | iter->bucket = -1; | |
1949 | goto scan_fwmark; | |
1950 | } | |
1951 | ||
1952 | /* next service in hashed by fwmark */ | |
1953 | if ((e = svc->f_list.next) != &ip_vs_svc_fwm_table[iter->bucket]) | |
1954 | return list_entry(e, struct ip_vs_service, f_list); | |
1955 | ||
1956 | scan_fwmark: | |
1957 | while (++iter->bucket < IP_VS_SVC_TAB_SIZE) { | |
1958 | list_for_each_entry(svc, &ip_vs_svc_fwm_table[iter->bucket], | |
1959 | f_list) | |
1960 | return svc; | |
1961 | } | |
1962 | ||
1963 | return NULL; | |
1964 | } | |
1965 | ||
1966 | static void ip_vs_info_seq_stop(struct seq_file *seq, void *v) | |
563e94f0 | 1967 | __releases(__ip_vs_svc_lock) |
1da177e4 LT |
1968 | { |
1969 | read_unlock_bh(&__ip_vs_svc_lock); | |
1970 | } | |
1971 | ||
1972 | ||
1973 | static int ip_vs_info_seq_show(struct seq_file *seq, void *v) | |
1974 | { | |
1975 | if (v == SEQ_START_TOKEN) { | |
1976 | seq_printf(seq, | |
1977 | "IP Virtual Server version %d.%d.%d (size=%d)\n", | |
6f7edb48 | 1978 | NVERSION(IP_VS_VERSION_CODE), ip_vs_conn_tab_size); |
1da177e4 LT |
1979 | seq_puts(seq, |
1980 | "Prot LocalAddress:Port Scheduler Flags\n"); | |
1981 | seq_puts(seq, | |
1982 | " -> RemoteAddress:Port Forward Weight ActiveConn InActConn\n"); | |
1983 | } else { | |
1984 | const struct ip_vs_service *svc = v; | |
1985 | const struct ip_vs_iter *iter = seq->private; | |
1986 | const struct ip_vs_dest *dest; | |
1987 | ||
667a5f18 VB |
1988 | if (iter->table == ip_vs_svc_table) { |
1989 | #ifdef CONFIG_IP_VS_IPV6 | |
1990 | if (svc->af == AF_INET6) | |
5b095d98 | 1991 | seq_printf(seq, "%s [%pI6]:%04X %s ", |
667a5f18 | 1992 | ip_vs_proto_name(svc->protocol), |
38ff4fa4 | 1993 | &svc->addr.in6, |
667a5f18 VB |
1994 | ntohs(svc->port), |
1995 | svc->scheduler->name); | |
1996 | else | |
1997 | #endif | |
26ec037f | 1998 | seq_printf(seq, "%s %08X:%04X %s %s ", |
667a5f18 VB |
1999 | ip_vs_proto_name(svc->protocol), |
2000 | ntohl(svc->addr.ip), | |
2001 | ntohs(svc->port), | |
26ec037f NC |
2002 | svc->scheduler->name, |
2003 | (svc->flags & IP_VS_SVC_F_ONEPACKET)?"ops ":""); | |
667a5f18 | 2004 | } else { |
26ec037f NC |
2005 | seq_printf(seq, "FWM %08X %s %s", |
2006 | svc->fwmark, svc->scheduler->name, | |
2007 | (svc->flags & IP_VS_SVC_F_ONEPACKET)?"ops ":""); | |
667a5f18 | 2008 | } |
1da177e4 LT |
2009 | |
2010 | if (svc->flags & IP_VS_SVC_F_PERSISTENT) | |
2011 | seq_printf(seq, "persistent %d %08X\n", | |
2012 | svc->timeout, | |
2013 | ntohl(svc->netmask)); | |
2014 | else | |
2015 | seq_putc(seq, '\n'); | |
2016 | ||
2017 | list_for_each_entry(dest, &svc->destinations, n_list) { | |
667a5f18 VB |
2018 | #ifdef CONFIG_IP_VS_IPV6 |
2019 | if (dest->af == AF_INET6) | |
2020 | seq_printf(seq, | |
5b095d98 | 2021 | " -> [%pI6]:%04X" |
667a5f18 | 2022 | " %-7s %-6d %-10d %-10d\n", |
38ff4fa4 | 2023 | &dest->addr.in6, |
667a5f18 VB |
2024 | ntohs(dest->port), |
2025 | ip_vs_fwd_name(atomic_read(&dest->conn_flags)), | |
2026 | atomic_read(&dest->weight), | |
2027 | atomic_read(&dest->activeconns), | |
2028 | atomic_read(&dest->inactconns)); | |
2029 | else | |
2030 | #endif | |
2031 | seq_printf(seq, | |
2032 | " -> %08X:%04X " | |
2033 | "%-7s %-6d %-10d %-10d\n", | |
2034 | ntohl(dest->addr.ip), | |
2035 | ntohs(dest->port), | |
2036 | ip_vs_fwd_name(atomic_read(&dest->conn_flags)), | |
2037 | atomic_read(&dest->weight), | |
2038 | atomic_read(&dest->activeconns), | |
2039 | atomic_read(&dest->inactconns)); | |
2040 | ||
1da177e4 LT |
2041 | } |
2042 | } | |
2043 | return 0; | |
2044 | } | |
2045 | ||
56b3d975 | 2046 | static const struct seq_operations ip_vs_info_seq_ops = { |
1da177e4 LT |
2047 | .start = ip_vs_info_seq_start, |
2048 | .next = ip_vs_info_seq_next, | |
2049 | .stop = ip_vs_info_seq_stop, | |
2050 | .show = ip_vs_info_seq_show, | |
2051 | }; | |
2052 | ||
2053 | static int ip_vs_info_open(struct inode *inode, struct file *file) | |
2054 | { | |
fc723250 | 2055 | return seq_open_net(inode, file, &ip_vs_info_seq_ops, |
cf7732e4 | 2056 | sizeof(struct ip_vs_iter)); |
1da177e4 LT |
2057 | } |
2058 | ||
9a32144e | 2059 | static const struct file_operations ip_vs_info_fops = { |
1da177e4 LT |
2060 | .owner = THIS_MODULE, |
2061 | .open = ip_vs_info_open, | |
2062 | .read = seq_read, | |
2063 | .llseek = seq_lseek, | |
0f08190f | 2064 | .release = seq_release_net, |
1da177e4 LT |
2065 | }; |
2066 | ||
1da177e4 LT |
2067 | static int ip_vs_stats_show(struct seq_file *seq, void *v) |
2068 | { | |
b17fc996 | 2069 | struct net *net = seq_file_single_net(seq); |
55a3d4e1 | 2070 | struct ip_vs_stats_user show; |
1da177e4 LT |
2071 | |
2072 | /* 01234567 01234567 01234567 0123456701234567 0123456701234567 */ | |
2073 | seq_puts(seq, | |
2074 | " Total Incoming Outgoing Incoming Outgoing\n"); | |
2075 | seq_printf(seq, | |
2076 | " Conns Packets Packets Bytes Bytes\n"); | |
2077 | ||
55a3d4e1 JA |
2078 | ip_vs_copy_stats(&show, &net_ipvs(net)->tot_stats); |
2079 | seq_printf(seq, "%8X %8X %8X %16LX %16LX\n\n", show.conns, | |
2080 | show.inpkts, show.outpkts, | |
2081 | (unsigned long long) show.inbytes, | |
2082 | (unsigned long long) show.outbytes); | |
1da177e4 LT |
2083 | |
2084 | /* 01234567 01234567 01234567 0123456701234567 0123456701234567 */ | |
2085 | seq_puts(seq, | |
2086 | " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n"); | |
55a3d4e1 JA |
2087 | seq_printf(seq, "%8X %8X %8X %16X %16X\n", |
2088 | show.cps, show.inpps, show.outpps, | |
2089 | show.inbps, show.outbps); | |
1da177e4 LT |
2090 | |
2091 | return 0; | |
2092 | } | |
2093 | ||
2094 | static int ip_vs_stats_seq_open(struct inode *inode, struct file *file) | |
2095 | { | |
fc723250 | 2096 | return single_open_net(inode, file, ip_vs_stats_show); |
1da177e4 LT |
2097 | } |
2098 | ||
9a32144e | 2099 | static const struct file_operations ip_vs_stats_fops = { |
1da177e4 LT |
2100 | .owner = THIS_MODULE, |
2101 | .open = ip_vs_stats_seq_open, | |
2102 | .read = seq_read, | |
2103 | .llseek = seq_lseek, | |
0f08190f | 2104 | .release = single_release_net, |
1da177e4 LT |
2105 | }; |
2106 | ||
b17fc996 HS |
2107 | static int ip_vs_stats_percpu_show(struct seq_file *seq, void *v) |
2108 | { | |
2109 | struct net *net = seq_file_single_net(seq); | |
2a0751af JA |
2110 | struct ip_vs_stats *tot_stats = &net_ipvs(net)->tot_stats; |
2111 | struct ip_vs_cpu_stats *cpustats = tot_stats->cpustats; | |
ea9f22cc | 2112 | struct ip_vs_stats_user rates; |
b17fc996 HS |
2113 | int i; |
2114 | ||
2115 | /* 01234567 01234567 01234567 0123456701234567 0123456701234567 */ | |
2116 | seq_puts(seq, | |
2117 | " Total Incoming Outgoing Incoming Outgoing\n"); | |
2118 | seq_printf(seq, | |
2119 | "CPU Conns Packets Packets Bytes Bytes\n"); | |
2120 | ||
2121 | for_each_possible_cpu(i) { | |
2a0751af JA |
2122 | struct ip_vs_cpu_stats *u = per_cpu_ptr(cpustats, i); |
2123 | unsigned int start; | |
2124 | __u64 inbytes, outbytes; | |
2125 | ||
2126 | do { | |
2127 | start = u64_stats_fetch_begin_bh(&u->syncp); | |
2128 | inbytes = u->ustats.inbytes; | |
2129 | outbytes = u->ustats.outbytes; | |
2130 | } while (u64_stats_fetch_retry_bh(&u->syncp, start)); | |
2131 | ||
b17fc996 | 2132 | seq_printf(seq, "%3X %8X %8X %8X %16LX %16LX\n", |
2a0751af JA |
2133 | i, u->ustats.conns, u->ustats.inpkts, |
2134 | u->ustats.outpkts, (__u64)inbytes, | |
2135 | (__u64)outbytes); | |
b17fc996 HS |
2136 | } |
2137 | ||
2138 | spin_lock_bh(&tot_stats->lock); | |
ea9f22cc | 2139 | |
b17fc996 HS |
2140 | seq_printf(seq, " ~ %8X %8X %8X %16LX %16LX\n\n", |
2141 | tot_stats->ustats.conns, tot_stats->ustats.inpkts, | |
2142 | tot_stats->ustats.outpkts, | |
2143 | (unsigned long long) tot_stats->ustats.inbytes, | |
2144 | (unsigned long long) tot_stats->ustats.outbytes); | |
2145 | ||
ea9f22cc JA |
2146 | ip_vs_read_estimator(&rates, tot_stats); |
2147 | ||
2148 | spin_unlock_bh(&tot_stats->lock); | |
2149 | ||
b17fc996 HS |
2150 | /* 01234567 01234567 01234567 0123456701234567 0123456701234567 */ |
2151 | seq_puts(seq, | |
2152 | " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n"); | |
2153 | seq_printf(seq, " %8X %8X %8X %16X %16X\n", | |
ea9f22cc JA |
2154 | rates.cps, |
2155 | rates.inpps, | |
2156 | rates.outpps, | |
2157 | rates.inbps, | |
2158 | rates.outbps); | |
b17fc996 HS |
2159 | |
2160 | return 0; | |
2161 | } | |
2162 | ||
2163 | static int ip_vs_stats_percpu_seq_open(struct inode *inode, struct file *file) | |
2164 | { | |
2165 | return single_open_net(inode, file, ip_vs_stats_percpu_show); | |
2166 | } | |
2167 | ||
2168 | static const struct file_operations ip_vs_stats_percpu_fops = { | |
2169 | .owner = THIS_MODULE, | |
2170 | .open = ip_vs_stats_percpu_seq_open, | |
2171 | .read = seq_read, | |
2172 | .llseek = seq_lseek, | |
0f08190f | 2173 | .release = single_release_net, |
b17fc996 | 2174 | }; |
1da177e4 LT |
2175 | #endif |
2176 | ||
2177 | /* | |
2178 | * Set timeout values for tcp tcpfin udp in the timeout_table. | |
2179 | */ | |
9330419d | 2180 | static int ip_vs_set_timeout(struct net *net, struct ip_vs_timeout_user *u) |
1da177e4 | 2181 | { |
091bb34c | 2182 | #if defined(CONFIG_IP_VS_PROTO_TCP) || defined(CONFIG_IP_VS_PROTO_UDP) |
9330419d | 2183 | struct ip_vs_proto_data *pd; |
091bb34c | 2184 | #endif |
9330419d | 2185 | |
1da177e4 LT |
2186 | IP_VS_DBG(2, "Setting timeout tcp:%d tcpfin:%d udp:%d\n", |
2187 | u->tcp_timeout, | |
2188 | u->tcp_fin_timeout, | |
2189 | u->udp_timeout); | |
2190 | ||
2191 | #ifdef CONFIG_IP_VS_PROTO_TCP | |
2192 | if (u->tcp_timeout) { | |
9330419d HS |
2193 | pd = ip_vs_proto_data_get(net, IPPROTO_TCP); |
2194 | pd->timeout_table[IP_VS_TCP_S_ESTABLISHED] | |
1da177e4 LT |
2195 | = u->tcp_timeout * HZ; |
2196 | } | |
2197 | ||
2198 | if (u->tcp_fin_timeout) { | |
9330419d HS |
2199 | pd = ip_vs_proto_data_get(net, IPPROTO_TCP); |
2200 | pd->timeout_table[IP_VS_TCP_S_FIN_WAIT] | |
1da177e4 LT |
2201 | = u->tcp_fin_timeout * HZ; |
2202 | } | |
2203 | #endif | |
2204 | ||
2205 | #ifdef CONFIG_IP_VS_PROTO_UDP | |
2206 | if (u->udp_timeout) { | |
9330419d HS |
2207 | pd = ip_vs_proto_data_get(net, IPPROTO_UDP); |
2208 | pd->timeout_table[IP_VS_UDP_S_NORMAL] | |
1da177e4 LT |
2209 | = u->udp_timeout * HZ; |
2210 | } | |
2211 | #endif | |
2212 | return 0; | |
2213 | } | |
2214 | ||
2215 | ||
2216 | #define SET_CMDID(cmd) (cmd - IP_VS_BASE_CTL) | |
2217 | #define SERVICE_ARG_LEN (sizeof(struct ip_vs_service_user)) | |
2218 | #define SVCDEST_ARG_LEN (sizeof(struct ip_vs_service_user) + \ | |
2219 | sizeof(struct ip_vs_dest_user)) | |
2220 | #define TIMEOUT_ARG_LEN (sizeof(struct ip_vs_timeout_user)) | |
2221 | #define DAEMON_ARG_LEN (sizeof(struct ip_vs_daemon_user)) | |
2222 | #define MAX_ARG_LEN SVCDEST_ARG_LEN | |
2223 | ||
9b5b5cff | 2224 | static const unsigned char set_arglen[SET_CMDID(IP_VS_SO_SET_MAX)+1] = { |
1da177e4 LT |
2225 | [SET_CMDID(IP_VS_SO_SET_ADD)] = SERVICE_ARG_LEN, |
2226 | [SET_CMDID(IP_VS_SO_SET_EDIT)] = SERVICE_ARG_LEN, | |
2227 | [SET_CMDID(IP_VS_SO_SET_DEL)] = SERVICE_ARG_LEN, | |
2228 | [SET_CMDID(IP_VS_SO_SET_FLUSH)] = 0, | |
2229 | [SET_CMDID(IP_VS_SO_SET_ADDDEST)] = SVCDEST_ARG_LEN, | |
2230 | [SET_CMDID(IP_VS_SO_SET_DELDEST)] = SVCDEST_ARG_LEN, | |
2231 | [SET_CMDID(IP_VS_SO_SET_EDITDEST)] = SVCDEST_ARG_LEN, | |
2232 | [SET_CMDID(IP_VS_SO_SET_TIMEOUT)] = TIMEOUT_ARG_LEN, | |
2233 | [SET_CMDID(IP_VS_SO_SET_STARTDAEMON)] = DAEMON_ARG_LEN, | |
2234 | [SET_CMDID(IP_VS_SO_SET_STOPDAEMON)] = DAEMON_ARG_LEN, | |
2235 | [SET_CMDID(IP_VS_SO_SET_ZERO)] = SERVICE_ARG_LEN, | |
2236 | }; | |
2237 | ||
c860c6b1 JV |
2238 | static void ip_vs_copy_usvc_compat(struct ip_vs_service_user_kern *usvc, |
2239 | struct ip_vs_service_user *usvc_compat) | |
2240 | { | |
0d1e71b0 SH |
2241 | memset(usvc, 0, sizeof(*usvc)); |
2242 | ||
c860c6b1 JV |
2243 | usvc->af = AF_INET; |
2244 | usvc->protocol = usvc_compat->protocol; | |
2245 | usvc->addr.ip = usvc_compat->addr; | |
2246 | usvc->port = usvc_compat->port; | |
2247 | usvc->fwmark = usvc_compat->fwmark; | |
2248 | ||
2249 | /* Deep copy of sched_name is not needed here */ | |
2250 | usvc->sched_name = usvc_compat->sched_name; | |
2251 | ||
2252 | usvc->flags = usvc_compat->flags; | |
2253 | usvc->timeout = usvc_compat->timeout; | |
2254 | usvc->netmask = usvc_compat->netmask; | |
2255 | } | |
2256 | ||
2257 | static void ip_vs_copy_udest_compat(struct ip_vs_dest_user_kern *udest, | |
2258 | struct ip_vs_dest_user *udest_compat) | |
2259 | { | |
0d1e71b0 SH |
2260 | memset(udest, 0, sizeof(*udest)); |
2261 | ||
c860c6b1 JV |
2262 | udest->addr.ip = udest_compat->addr; |
2263 | udest->port = udest_compat->port; | |
2264 | udest->conn_flags = udest_compat->conn_flags; | |
2265 | udest->weight = udest_compat->weight; | |
2266 | udest->u_threshold = udest_compat->u_threshold; | |
2267 | udest->l_threshold = udest_compat->l_threshold; | |
2268 | } | |
2269 | ||
1da177e4 LT |
2270 | static int |
2271 | do_ip_vs_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len) | |
2272 | { | |
fc723250 | 2273 | struct net *net = sock_net(sk); |
1da177e4 LT |
2274 | int ret; |
2275 | unsigned char arg[MAX_ARG_LEN]; | |
c860c6b1 JV |
2276 | struct ip_vs_service_user *usvc_compat; |
2277 | struct ip_vs_service_user_kern usvc; | |
1da177e4 | 2278 | struct ip_vs_service *svc; |
c860c6b1 JV |
2279 | struct ip_vs_dest_user *udest_compat; |
2280 | struct ip_vs_dest_user_kern udest; | |
ae1d48b2 | 2281 | struct netns_ipvs *ipvs = net_ipvs(net); |
1da177e4 LT |
2282 | |
2283 | if (!capable(CAP_NET_ADMIN)) | |
2284 | return -EPERM; | |
2285 | ||
04bcef2a AV |
2286 | if (cmd < IP_VS_BASE_CTL || cmd > IP_VS_SO_SET_MAX) |
2287 | return -EINVAL; | |
2288 | if (len < 0 || len > MAX_ARG_LEN) | |
2289 | return -EINVAL; | |
1da177e4 | 2290 | if (len != set_arglen[SET_CMDID(cmd)]) { |
1e3e238e HE |
2291 | pr_err("set_ctl: len %u != %u\n", |
2292 | len, set_arglen[SET_CMDID(cmd)]); | |
1da177e4 LT |
2293 | return -EINVAL; |
2294 | } | |
2295 | ||
2296 | if (copy_from_user(arg, user, len) != 0) | |
2297 | return -EFAULT; | |
2298 | ||
2299 | /* increase the module use count */ | |
2300 | ip_vs_use_count_inc(); | |
2301 | ||
ae1d48b2 HS |
2302 | /* Handle daemons since they have another lock */ |
2303 | if (cmd == IP_VS_SO_SET_STARTDAEMON || | |
2304 | cmd == IP_VS_SO_SET_STOPDAEMON) { | |
2305 | struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg; | |
2306 | ||
2307 | if (mutex_lock_interruptible(&ipvs->sync_mutex)) { | |
2308 | ret = -ERESTARTSYS; | |
2309 | goto out_dec; | |
2310 | } | |
2311 | if (cmd == IP_VS_SO_SET_STARTDAEMON) | |
2312 | ret = start_sync_thread(net, dm->state, dm->mcast_ifn, | |
2313 | dm->syncid); | |
2314 | else | |
2315 | ret = stop_sync_thread(net, dm->state); | |
2316 | mutex_unlock(&ipvs->sync_mutex); | |
2317 | goto out_dec; | |
2318 | } | |
2319 | ||
14cc3e2b | 2320 | if (mutex_lock_interruptible(&__ip_vs_mutex)) { |
1da177e4 LT |
2321 | ret = -ERESTARTSYS; |
2322 | goto out_dec; | |
2323 | } | |
2324 | ||
2325 | if (cmd == IP_VS_SO_SET_FLUSH) { | |
2326 | /* Flush the virtual service */ | |
fc723250 | 2327 | ret = ip_vs_flush(net); |
1da177e4 LT |
2328 | goto out_unlock; |
2329 | } else if (cmd == IP_VS_SO_SET_TIMEOUT) { | |
2330 | /* Set timeout values for (tcp tcpfin udp) */ | |
9330419d | 2331 | ret = ip_vs_set_timeout(net, (struct ip_vs_timeout_user *)arg); |
1da177e4 | 2332 | goto out_unlock; |
1da177e4 LT |
2333 | } |
2334 | ||
c860c6b1 JV |
2335 | usvc_compat = (struct ip_vs_service_user *)arg; |
2336 | udest_compat = (struct ip_vs_dest_user *)(usvc_compat + 1); | |
2337 | ||
2338 | /* We only use the new structs internally, so copy userspace compat | |
2339 | * structs to extended internal versions */ | |
2340 | ip_vs_copy_usvc_compat(&usvc, usvc_compat); | |
2341 | ip_vs_copy_udest_compat(&udest, udest_compat); | |
1da177e4 LT |
2342 | |
2343 | if (cmd == IP_VS_SO_SET_ZERO) { | |
2344 | /* if no service address is set, zero counters in all */ | |
c860c6b1 | 2345 | if (!usvc.fwmark && !usvc.addr.ip && !usvc.port) { |
fc723250 | 2346 | ret = ip_vs_zero_all(net); |
1da177e4 LT |
2347 | goto out_unlock; |
2348 | } | |
2349 | } | |
2350 | ||
2906f66a VMR |
2351 | /* Check for valid protocol: TCP or UDP or SCTP, even for fwmark!=0 */ |
2352 | if (usvc.protocol != IPPROTO_TCP && usvc.protocol != IPPROTO_UDP && | |
2353 | usvc.protocol != IPPROTO_SCTP) { | |
1e3e238e HE |
2354 | pr_err("set_ctl: invalid protocol: %d %pI4:%d %s\n", |
2355 | usvc.protocol, &usvc.addr.ip, | |
2356 | ntohs(usvc.port), usvc.sched_name); | |
1da177e4 LT |
2357 | ret = -EFAULT; |
2358 | goto out_unlock; | |
2359 | } | |
2360 | ||
2361 | /* Lookup the exact service by <protocol, addr, port> or fwmark */ | |
c860c6b1 | 2362 | if (usvc.fwmark == 0) |
fc723250 | 2363 | svc = __ip_vs_service_find(net, usvc.af, usvc.protocol, |
26c15cfd | 2364 | &usvc.addr, usvc.port); |
1da177e4 | 2365 | else |
fc723250 | 2366 | svc = __ip_vs_svc_fwm_find(net, usvc.af, usvc.fwmark); |
1da177e4 LT |
2367 | |
2368 | if (cmd != IP_VS_SO_SET_ADD | |
c860c6b1 | 2369 | && (svc == NULL || svc->protocol != usvc.protocol)) { |
1da177e4 | 2370 | ret = -ESRCH; |
26c15cfd | 2371 | goto out_unlock; |
1da177e4 LT |
2372 | } |
2373 | ||
2374 | switch (cmd) { | |
2375 | case IP_VS_SO_SET_ADD: | |
2376 | if (svc != NULL) | |
2377 | ret = -EEXIST; | |
2378 | else | |
fc723250 | 2379 | ret = ip_vs_add_service(net, &usvc, &svc); |
1da177e4 LT |
2380 | break; |
2381 | case IP_VS_SO_SET_EDIT: | |
c860c6b1 | 2382 | ret = ip_vs_edit_service(svc, &usvc); |
1da177e4 LT |
2383 | break; |
2384 | case IP_VS_SO_SET_DEL: | |
2385 | ret = ip_vs_del_service(svc); | |
2386 | if (!ret) | |
2387 | goto out_unlock; | |
2388 | break; | |
2389 | case IP_VS_SO_SET_ZERO: | |
2390 | ret = ip_vs_zero_service(svc); | |
2391 | break; | |
2392 | case IP_VS_SO_SET_ADDDEST: | |
c860c6b1 | 2393 | ret = ip_vs_add_dest(svc, &udest); |
1da177e4 LT |
2394 | break; |
2395 | case IP_VS_SO_SET_EDITDEST: | |
c860c6b1 | 2396 | ret = ip_vs_edit_dest(svc, &udest); |
1da177e4 LT |
2397 | break; |
2398 | case IP_VS_SO_SET_DELDEST: | |
c860c6b1 | 2399 | ret = ip_vs_del_dest(svc, &udest); |
1da177e4 LT |
2400 | break; |
2401 | default: | |
2402 | ret = -EINVAL; | |
2403 | } | |
2404 | ||
1da177e4 | 2405 | out_unlock: |
14cc3e2b | 2406 | mutex_unlock(&__ip_vs_mutex); |
1da177e4 LT |
2407 | out_dec: |
2408 | /* decrease the module use count */ | |
2409 | ip_vs_use_count_dec(); | |
2410 | ||
2411 | return ret; | |
2412 | } | |
2413 | ||
2414 | ||
1da177e4 LT |
2415 | static void |
2416 | ip_vs_copy_service(struct ip_vs_service_entry *dst, struct ip_vs_service *src) | |
2417 | { | |
2418 | dst->protocol = src->protocol; | |
e7ade46a | 2419 | dst->addr = src->addr.ip; |
1da177e4 LT |
2420 | dst->port = src->port; |
2421 | dst->fwmark = src->fwmark; | |
4da62fc7 | 2422 | strlcpy(dst->sched_name, src->scheduler->name, sizeof(dst->sched_name)); |
1da177e4 LT |
2423 | dst->flags = src->flags; |
2424 | dst->timeout = src->timeout / HZ; | |
2425 | dst->netmask = src->netmask; | |
2426 | dst->num_dests = src->num_dests; | |
2427 | ip_vs_copy_stats(&dst->stats, &src->stats); | |
2428 | } | |
2429 | ||
2430 | static inline int | |
fc723250 HS |
2431 | __ip_vs_get_service_entries(struct net *net, |
2432 | const struct ip_vs_get_services *get, | |
1da177e4 LT |
2433 | struct ip_vs_get_services __user *uptr) |
2434 | { | |
2435 | int idx, count=0; | |
2436 | struct ip_vs_service *svc; | |
2437 | struct ip_vs_service_entry entry; | |
2438 | int ret = 0; | |
2439 | ||
2440 | for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
2441 | list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) { | |
f94fd041 | 2442 | /* Only expose IPv4 entries to old interface */ |
fc723250 | 2443 | if (svc->af != AF_INET || !net_eq(svc->net, net)) |
f94fd041 JV |
2444 | continue; |
2445 | ||
1da177e4 LT |
2446 | if (count >= get->num_services) |
2447 | goto out; | |
4da62fc7 | 2448 | memset(&entry, 0, sizeof(entry)); |
1da177e4 LT |
2449 | ip_vs_copy_service(&entry, svc); |
2450 | if (copy_to_user(&uptr->entrytable[count], | |
2451 | &entry, sizeof(entry))) { | |
2452 | ret = -EFAULT; | |
2453 | goto out; | |
2454 | } | |
2455 | count++; | |
2456 | } | |
2457 | } | |
2458 | ||
2459 | for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { | |
2460 | list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) { | |
f94fd041 | 2461 | /* Only expose IPv4 entries to old interface */ |
fc723250 | 2462 | if (svc->af != AF_INET || !net_eq(svc->net, net)) |
f94fd041 JV |
2463 | continue; |
2464 | ||
1da177e4 LT |
2465 | if (count >= get->num_services) |
2466 | goto out; | |
4da62fc7 | 2467 | memset(&entry, 0, sizeof(entry)); |
1da177e4 LT |
2468 | ip_vs_copy_service(&entry, svc); |
2469 | if (copy_to_user(&uptr->entrytable[count], | |
2470 | &entry, sizeof(entry))) { | |
2471 | ret = -EFAULT; | |
2472 | goto out; | |
2473 | } | |
2474 | count++; | |
2475 | } | |
2476 | } | |
552ad65a | 2477 | out: |
1da177e4 LT |
2478 | return ret; |
2479 | } | |
2480 | ||
2481 | static inline int | |
fc723250 | 2482 | __ip_vs_get_dest_entries(struct net *net, const struct ip_vs_get_dests *get, |
1da177e4 LT |
2483 | struct ip_vs_get_dests __user *uptr) |
2484 | { | |
2485 | struct ip_vs_service *svc; | |
b18610de | 2486 | union nf_inet_addr addr = { .ip = get->addr }; |
1da177e4 LT |
2487 | int ret = 0; |
2488 | ||
2489 | if (get->fwmark) | |
fc723250 | 2490 | svc = __ip_vs_svc_fwm_find(net, AF_INET, get->fwmark); |
1da177e4 | 2491 | else |
fc723250 | 2492 | svc = __ip_vs_service_find(net, AF_INET, get->protocol, &addr, |
26c15cfd | 2493 | get->port); |
b18610de | 2494 | |
1da177e4 LT |
2495 | if (svc) { |
2496 | int count = 0; | |
2497 | struct ip_vs_dest *dest; | |
2498 | struct ip_vs_dest_entry entry; | |
2499 | ||
2500 | list_for_each_entry(dest, &svc->destinations, n_list) { | |
2501 | if (count >= get->num_dests) | |
2502 | break; | |
2503 | ||
e7ade46a | 2504 | entry.addr = dest->addr.ip; |
1da177e4 LT |
2505 | entry.port = dest->port; |
2506 | entry.conn_flags = atomic_read(&dest->conn_flags); | |
2507 | entry.weight = atomic_read(&dest->weight); | |
2508 | entry.u_threshold = dest->u_threshold; | |
2509 | entry.l_threshold = dest->l_threshold; | |
2510 | entry.activeconns = atomic_read(&dest->activeconns); | |
2511 | entry.inactconns = atomic_read(&dest->inactconns); | |
2512 | entry.persistconns = atomic_read(&dest->persistconns); | |
2513 | ip_vs_copy_stats(&entry.stats, &dest->stats); | |
2514 | if (copy_to_user(&uptr->entrytable[count], | |
2515 | &entry, sizeof(entry))) { | |
2516 | ret = -EFAULT; | |
2517 | break; | |
2518 | } | |
2519 | count++; | |
2520 | } | |
1da177e4 LT |
2521 | } else |
2522 | ret = -ESRCH; | |
2523 | return ret; | |
2524 | } | |
2525 | ||
2526 | static inline void | |
9330419d | 2527 | __ip_vs_get_timeouts(struct net *net, struct ip_vs_timeout_user *u) |
1da177e4 | 2528 | { |
091bb34c | 2529 | #if defined(CONFIG_IP_VS_PROTO_TCP) || defined(CONFIG_IP_VS_PROTO_UDP) |
9330419d | 2530 | struct ip_vs_proto_data *pd; |
091bb34c | 2531 | #endif |
9330419d | 2532 | |
1da177e4 | 2533 | #ifdef CONFIG_IP_VS_PROTO_TCP |
9330419d HS |
2534 | pd = ip_vs_proto_data_get(net, IPPROTO_TCP); |
2535 | u->tcp_timeout = pd->timeout_table[IP_VS_TCP_S_ESTABLISHED] / HZ; | |
2536 | u->tcp_fin_timeout = pd->timeout_table[IP_VS_TCP_S_FIN_WAIT] / HZ; | |
1da177e4 LT |
2537 | #endif |
2538 | #ifdef CONFIG_IP_VS_PROTO_UDP | |
9330419d | 2539 | pd = ip_vs_proto_data_get(net, IPPROTO_UDP); |
1da177e4 | 2540 | u->udp_timeout = |
9330419d | 2541 | pd->timeout_table[IP_VS_UDP_S_NORMAL] / HZ; |
1da177e4 LT |
2542 | #endif |
2543 | } | |
2544 | ||
2545 | ||
2546 | #define GET_CMDID(cmd) (cmd - IP_VS_BASE_CTL) | |
2547 | #define GET_INFO_ARG_LEN (sizeof(struct ip_vs_getinfo)) | |
2548 | #define GET_SERVICES_ARG_LEN (sizeof(struct ip_vs_get_services)) | |
2549 | #define GET_SERVICE_ARG_LEN (sizeof(struct ip_vs_service_entry)) | |
2550 | #define GET_DESTS_ARG_LEN (sizeof(struct ip_vs_get_dests)) | |
2551 | #define GET_TIMEOUT_ARG_LEN (sizeof(struct ip_vs_timeout_user)) | |
2552 | #define GET_DAEMON_ARG_LEN (sizeof(struct ip_vs_daemon_user) * 2) | |
2553 | ||
9b5b5cff | 2554 | static const unsigned char get_arglen[GET_CMDID(IP_VS_SO_GET_MAX)+1] = { |
1da177e4 LT |
2555 | [GET_CMDID(IP_VS_SO_GET_VERSION)] = 64, |
2556 | [GET_CMDID(IP_VS_SO_GET_INFO)] = GET_INFO_ARG_LEN, | |
2557 | [GET_CMDID(IP_VS_SO_GET_SERVICES)] = GET_SERVICES_ARG_LEN, | |
2558 | [GET_CMDID(IP_VS_SO_GET_SERVICE)] = GET_SERVICE_ARG_LEN, | |
2559 | [GET_CMDID(IP_VS_SO_GET_DESTS)] = GET_DESTS_ARG_LEN, | |
2560 | [GET_CMDID(IP_VS_SO_GET_TIMEOUT)] = GET_TIMEOUT_ARG_LEN, | |
2561 | [GET_CMDID(IP_VS_SO_GET_DAEMON)] = GET_DAEMON_ARG_LEN, | |
2562 | }; | |
2563 | ||
2564 | static int | |
2565 | do_ip_vs_get_ctl(struct sock *sk, int cmd, void __user *user, int *len) | |
2566 | { | |
2567 | unsigned char arg[128]; | |
2568 | int ret = 0; | |
04bcef2a | 2569 | unsigned int copylen; |
fc723250 | 2570 | struct net *net = sock_net(sk); |
f131315f | 2571 | struct netns_ipvs *ipvs = net_ipvs(net); |
1da177e4 | 2572 | |
fc723250 | 2573 | BUG_ON(!net); |
1da177e4 LT |
2574 | if (!capable(CAP_NET_ADMIN)) |
2575 | return -EPERM; | |
2576 | ||
04bcef2a AV |
2577 | if (cmd < IP_VS_BASE_CTL || cmd > IP_VS_SO_GET_MAX) |
2578 | return -EINVAL; | |
2579 | ||
1da177e4 | 2580 | if (*len < get_arglen[GET_CMDID(cmd)]) { |
1e3e238e HE |
2581 | pr_err("get_ctl: len %u < %u\n", |
2582 | *len, get_arglen[GET_CMDID(cmd)]); | |
1da177e4 LT |
2583 | return -EINVAL; |
2584 | } | |
2585 | ||
04bcef2a AV |
2586 | copylen = get_arglen[GET_CMDID(cmd)]; |
2587 | if (copylen > 128) | |
2588 | return -EINVAL; | |
2589 | ||
2590 | if (copy_from_user(arg, user, copylen) != 0) | |
1da177e4 | 2591 | return -EFAULT; |
ae1d48b2 HS |
2592 | /* |
2593 | * Handle daemons first since it has its own locking | |
2594 | */ | |
2595 | if (cmd == IP_VS_SO_GET_DAEMON) { | |
2596 | struct ip_vs_daemon_user d[2]; | |
2597 | ||
2598 | memset(&d, 0, sizeof(d)); | |
2599 | if (mutex_lock_interruptible(&ipvs->sync_mutex)) | |
2600 | return -ERESTARTSYS; | |
2601 | ||
2602 | if (ipvs->sync_state & IP_VS_STATE_MASTER) { | |
2603 | d[0].state = IP_VS_STATE_MASTER; | |
2604 | strlcpy(d[0].mcast_ifn, ipvs->master_mcast_ifn, | |
2605 | sizeof(d[0].mcast_ifn)); | |
2606 | d[0].syncid = ipvs->master_syncid; | |
2607 | } | |
2608 | if (ipvs->sync_state & IP_VS_STATE_BACKUP) { | |
2609 | d[1].state = IP_VS_STATE_BACKUP; | |
2610 | strlcpy(d[1].mcast_ifn, ipvs->backup_mcast_ifn, | |
2611 | sizeof(d[1].mcast_ifn)); | |
2612 | d[1].syncid = ipvs->backup_syncid; | |
2613 | } | |
2614 | if (copy_to_user(user, &d, sizeof(d)) != 0) | |
2615 | ret = -EFAULT; | |
2616 | mutex_unlock(&ipvs->sync_mutex); | |
2617 | return ret; | |
2618 | } | |
1da177e4 | 2619 | |
14cc3e2b | 2620 | if (mutex_lock_interruptible(&__ip_vs_mutex)) |
1da177e4 LT |
2621 | return -ERESTARTSYS; |
2622 | ||
2623 | switch (cmd) { | |
2624 | case IP_VS_SO_GET_VERSION: | |
2625 | { | |
2626 | char buf[64]; | |
2627 | ||
2628 | sprintf(buf, "IP Virtual Server version %d.%d.%d (size=%d)", | |
6f7edb48 | 2629 | NVERSION(IP_VS_VERSION_CODE), ip_vs_conn_tab_size); |
1da177e4 LT |
2630 | if (copy_to_user(user, buf, strlen(buf)+1) != 0) { |
2631 | ret = -EFAULT; | |
2632 | goto out; | |
2633 | } | |
2634 | *len = strlen(buf)+1; | |
2635 | } | |
2636 | break; | |
2637 | ||
2638 | case IP_VS_SO_GET_INFO: | |
2639 | { | |
2640 | struct ip_vs_getinfo info; | |
2641 | info.version = IP_VS_VERSION_CODE; | |
6f7edb48 | 2642 | info.size = ip_vs_conn_tab_size; |
a0840e2e | 2643 | info.num_services = ipvs->num_services; |
1da177e4 LT |
2644 | if (copy_to_user(user, &info, sizeof(info)) != 0) |
2645 | ret = -EFAULT; | |
2646 | } | |
2647 | break; | |
2648 | ||
2649 | case IP_VS_SO_GET_SERVICES: | |
2650 | { | |
2651 | struct ip_vs_get_services *get; | |
2652 | int size; | |
2653 | ||
2654 | get = (struct ip_vs_get_services *)arg; | |
2655 | size = sizeof(*get) + | |
2656 | sizeof(struct ip_vs_service_entry) * get->num_services; | |
2657 | if (*len != size) { | |
1e3e238e | 2658 | pr_err("length: %u != %u\n", *len, size); |
1da177e4 LT |
2659 | ret = -EINVAL; |
2660 | goto out; | |
2661 | } | |
fc723250 | 2662 | ret = __ip_vs_get_service_entries(net, get, user); |
1da177e4 LT |
2663 | } |
2664 | break; | |
2665 | ||
2666 | case IP_VS_SO_GET_SERVICE: | |
2667 | { | |
2668 | struct ip_vs_service_entry *entry; | |
2669 | struct ip_vs_service *svc; | |
b18610de | 2670 | union nf_inet_addr addr; |
1da177e4 LT |
2671 | |
2672 | entry = (struct ip_vs_service_entry *)arg; | |
b18610de | 2673 | addr.ip = entry->addr; |
1da177e4 | 2674 | if (entry->fwmark) |
fc723250 | 2675 | svc = __ip_vs_svc_fwm_find(net, AF_INET, entry->fwmark); |
1da177e4 | 2676 | else |
fc723250 HS |
2677 | svc = __ip_vs_service_find(net, AF_INET, |
2678 | entry->protocol, &addr, | |
2679 | entry->port); | |
1da177e4 LT |
2680 | if (svc) { |
2681 | ip_vs_copy_service(entry, svc); | |
2682 | if (copy_to_user(user, entry, sizeof(*entry)) != 0) | |
2683 | ret = -EFAULT; | |
1da177e4 LT |
2684 | } else |
2685 | ret = -ESRCH; | |
2686 | } | |
2687 | break; | |
2688 | ||
2689 | case IP_VS_SO_GET_DESTS: | |
2690 | { | |
2691 | struct ip_vs_get_dests *get; | |
2692 | int size; | |
2693 | ||
2694 | get = (struct ip_vs_get_dests *)arg; | |
2695 | size = sizeof(*get) + | |
2696 | sizeof(struct ip_vs_dest_entry) * get->num_dests; | |
2697 | if (*len != size) { | |
1e3e238e | 2698 | pr_err("length: %u != %u\n", *len, size); |
1da177e4 LT |
2699 | ret = -EINVAL; |
2700 | goto out; | |
2701 | } | |
fc723250 | 2702 | ret = __ip_vs_get_dest_entries(net, get, user); |
1da177e4 LT |
2703 | } |
2704 | break; | |
2705 | ||
2706 | case IP_VS_SO_GET_TIMEOUT: | |
2707 | { | |
2708 | struct ip_vs_timeout_user t; | |
2709 | ||
9330419d | 2710 | __ip_vs_get_timeouts(net, &t); |
1da177e4 LT |
2711 | if (copy_to_user(user, &t, sizeof(t)) != 0) |
2712 | ret = -EFAULT; | |
2713 | } | |
2714 | break; | |
2715 | ||
1da177e4 LT |
2716 | default: |
2717 | ret = -EINVAL; | |
2718 | } | |
2719 | ||
552ad65a | 2720 | out: |
14cc3e2b | 2721 | mutex_unlock(&__ip_vs_mutex); |
1da177e4 LT |
2722 | return ret; |
2723 | } | |
2724 | ||
2725 | ||
2726 | static struct nf_sockopt_ops ip_vs_sockopts = { | |
2727 | .pf = PF_INET, | |
2728 | .set_optmin = IP_VS_BASE_CTL, | |
2729 | .set_optmax = IP_VS_SO_SET_MAX+1, | |
2730 | .set = do_ip_vs_set_ctl, | |
2731 | .get_optmin = IP_VS_BASE_CTL, | |
2732 | .get_optmax = IP_VS_SO_GET_MAX+1, | |
2733 | .get = do_ip_vs_get_ctl, | |
16fcec35 | 2734 | .owner = THIS_MODULE, |
1da177e4 LT |
2735 | }; |
2736 | ||
9a812198 JV |
2737 | /* |
2738 | * Generic Netlink interface | |
2739 | */ | |
2740 | ||
2741 | /* IPVS genetlink family */ | |
2742 | static struct genl_family ip_vs_genl_family = { | |
2743 | .id = GENL_ID_GENERATE, | |
2744 | .hdrsize = 0, | |
2745 | .name = IPVS_GENL_NAME, | |
2746 | .version = IPVS_GENL_VERSION, | |
2747 | .maxattr = IPVS_CMD_MAX, | |
c6d2d445 | 2748 | .netnsok = true, /* Make ipvsadm to work on netns */ |
9a812198 JV |
2749 | }; |
2750 | ||
2751 | /* Policy used for first-level command attributes */ | |
2752 | static const struct nla_policy ip_vs_cmd_policy[IPVS_CMD_ATTR_MAX + 1] = { | |
2753 | [IPVS_CMD_ATTR_SERVICE] = { .type = NLA_NESTED }, | |
2754 | [IPVS_CMD_ATTR_DEST] = { .type = NLA_NESTED }, | |
2755 | [IPVS_CMD_ATTR_DAEMON] = { .type = NLA_NESTED }, | |
2756 | [IPVS_CMD_ATTR_TIMEOUT_TCP] = { .type = NLA_U32 }, | |
2757 | [IPVS_CMD_ATTR_TIMEOUT_TCP_FIN] = { .type = NLA_U32 }, | |
2758 | [IPVS_CMD_ATTR_TIMEOUT_UDP] = { .type = NLA_U32 }, | |
2759 | }; | |
2760 | ||
2761 | /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DAEMON */ | |
2762 | static const struct nla_policy ip_vs_daemon_policy[IPVS_DAEMON_ATTR_MAX + 1] = { | |
2763 | [IPVS_DAEMON_ATTR_STATE] = { .type = NLA_U32 }, | |
2764 | [IPVS_DAEMON_ATTR_MCAST_IFN] = { .type = NLA_NUL_STRING, | |
2765 | .len = IP_VS_IFNAME_MAXLEN }, | |
2766 | [IPVS_DAEMON_ATTR_SYNC_ID] = { .type = NLA_U32 }, | |
2767 | }; | |
2768 | ||
2769 | /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_SERVICE */ | |
2770 | static const struct nla_policy ip_vs_svc_policy[IPVS_SVC_ATTR_MAX + 1] = { | |
2771 | [IPVS_SVC_ATTR_AF] = { .type = NLA_U16 }, | |
2772 | [IPVS_SVC_ATTR_PROTOCOL] = { .type = NLA_U16 }, | |
2773 | [IPVS_SVC_ATTR_ADDR] = { .type = NLA_BINARY, | |
2774 | .len = sizeof(union nf_inet_addr) }, | |
2775 | [IPVS_SVC_ATTR_PORT] = { .type = NLA_U16 }, | |
2776 | [IPVS_SVC_ATTR_FWMARK] = { .type = NLA_U32 }, | |
2777 | [IPVS_SVC_ATTR_SCHED_NAME] = { .type = NLA_NUL_STRING, | |
2778 | .len = IP_VS_SCHEDNAME_MAXLEN }, | |
0d1e71b0 SH |
2779 | [IPVS_SVC_ATTR_PE_NAME] = { .type = NLA_NUL_STRING, |
2780 | .len = IP_VS_PENAME_MAXLEN }, | |
9a812198 JV |
2781 | [IPVS_SVC_ATTR_FLAGS] = { .type = NLA_BINARY, |
2782 | .len = sizeof(struct ip_vs_flags) }, | |
2783 | [IPVS_SVC_ATTR_TIMEOUT] = { .type = NLA_U32 }, | |
2784 | [IPVS_SVC_ATTR_NETMASK] = { .type = NLA_U32 }, | |
2785 | [IPVS_SVC_ATTR_STATS] = { .type = NLA_NESTED }, | |
2786 | }; | |
2787 | ||
2788 | /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DEST */ | |
2789 | static const struct nla_policy ip_vs_dest_policy[IPVS_DEST_ATTR_MAX + 1] = { | |
2790 | [IPVS_DEST_ATTR_ADDR] = { .type = NLA_BINARY, | |
2791 | .len = sizeof(union nf_inet_addr) }, | |
2792 | [IPVS_DEST_ATTR_PORT] = { .type = NLA_U16 }, | |
2793 | [IPVS_DEST_ATTR_FWD_METHOD] = { .type = NLA_U32 }, | |
2794 | [IPVS_DEST_ATTR_WEIGHT] = { .type = NLA_U32 }, | |
2795 | [IPVS_DEST_ATTR_U_THRESH] = { .type = NLA_U32 }, | |
2796 | [IPVS_DEST_ATTR_L_THRESH] = { .type = NLA_U32 }, | |
2797 | [IPVS_DEST_ATTR_ACTIVE_CONNS] = { .type = NLA_U32 }, | |
2798 | [IPVS_DEST_ATTR_INACT_CONNS] = { .type = NLA_U32 }, | |
2799 | [IPVS_DEST_ATTR_PERSIST_CONNS] = { .type = NLA_U32 }, | |
2800 | [IPVS_DEST_ATTR_STATS] = { .type = NLA_NESTED }, | |
2801 | }; | |
2802 | ||
2803 | static int ip_vs_genl_fill_stats(struct sk_buff *skb, int container_type, | |
2804 | struct ip_vs_stats *stats) | |
2805 | { | |
55a3d4e1 | 2806 | struct ip_vs_stats_user ustats; |
9a812198 JV |
2807 | struct nlattr *nl_stats = nla_nest_start(skb, container_type); |
2808 | if (!nl_stats) | |
2809 | return -EMSGSIZE; | |
2810 | ||
55a3d4e1 | 2811 | ip_vs_copy_stats(&ustats, stats); |
9a812198 | 2812 | |
55a3d4e1 JA |
2813 | NLA_PUT_U32(skb, IPVS_STATS_ATTR_CONNS, ustats.conns); |
2814 | NLA_PUT_U32(skb, IPVS_STATS_ATTR_INPKTS, ustats.inpkts); | |
2815 | NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTPKTS, ustats.outpkts); | |
2816 | NLA_PUT_U64(skb, IPVS_STATS_ATTR_INBYTES, ustats.inbytes); | |
2817 | NLA_PUT_U64(skb, IPVS_STATS_ATTR_OUTBYTES, ustats.outbytes); | |
2818 | NLA_PUT_U32(skb, IPVS_STATS_ATTR_CPS, ustats.cps); | |
2819 | NLA_PUT_U32(skb, IPVS_STATS_ATTR_INPPS, ustats.inpps); | |
2820 | NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTPPS, ustats.outpps); | |
2821 | NLA_PUT_U32(skb, IPVS_STATS_ATTR_INBPS, ustats.inbps); | |
2822 | NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTBPS, ustats.outbps); | |
9a812198 JV |
2823 | |
2824 | nla_nest_end(skb, nl_stats); | |
2825 | ||
2826 | return 0; | |
2827 | ||
2828 | nla_put_failure: | |
9a812198 JV |
2829 | nla_nest_cancel(skb, nl_stats); |
2830 | return -EMSGSIZE; | |
2831 | } | |
2832 | ||
2833 | static int ip_vs_genl_fill_service(struct sk_buff *skb, | |
2834 | struct ip_vs_service *svc) | |
2835 | { | |
2836 | struct nlattr *nl_service; | |
2837 | struct ip_vs_flags flags = { .flags = svc->flags, | |
2838 | .mask = ~0 }; | |
2839 | ||
2840 | nl_service = nla_nest_start(skb, IPVS_CMD_ATTR_SERVICE); | |
2841 | if (!nl_service) | |
2842 | return -EMSGSIZE; | |
2843 | ||
f94fd041 | 2844 | NLA_PUT_U16(skb, IPVS_SVC_ATTR_AF, svc->af); |
9a812198 JV |
2845 | |
2846 | if (svc->fwmark) { | |
2847 | NLA_PUT_U32(skb, IPVS_SVC_ATTR_FWMARK, svc->fwmark); | |
2848 | } else { | |
2849 | NLA_PUT_U16(skb, IPVS_SVC_ATTR_PROTOCOL, svc->protocol); | |
2850 | NLA_PUT(skb, IPVS_SVC_ATTR_ADDR, sizeof(svc->addr), &svc->addr); | |
2851 | NLA_PUT_U16(skb, IPVS_SVC_ATTR_PORT, svc->port); | |
2852 | } | |
2853 | ||
2854 | NLA_PUT_STRING(skb, IPVS_SVC_ATTR_SCHED_NAME, svc->scheduler->name); | |
0d1e71b0 SH |
2855 | if (svc->pe) |
2856 | NLA_PUT_STRING(skb, IPVS_SVC_ATTR_PE_NAME, svc->pe->name); | |
9a812198 JV |
2857 | NLA_PUT(skb, IPVS_SVC_ATTR_FLAGS, sizeof(flags), &flags); |
2858 | NLA_PUT_U32(skb, IPVS_SVC_ATTR_TIMEOUT, svc->timeout / HZ); | |
2859 | NLA_PUT_U32(skb, IPVS_SVC_ATTR_NETMASK, svc->netmask); | |
2860 | ||
2861 | if (ip_vs_genl_fill_stats(skb, IPVS_SVC_ATTR_STATS, &svc->stats)) | |
2862 | goto nla_put_failure; | |
2863 | ||
2864 | nla_nest_end(skb, nl_service); | |
2865 | ||
2866 | return 0; | |
2867 | ||
2868 | nla_put_failure: | |
2869 | nla_nest_cancel(skb, nl_service); | |
2870 | return -EMSGSIZE; | |
2871 | } | |
2872 | ||
2873 | static int ip_vs_genl_dump_service(struct sk_buff *skb, | |
2874 | struct ip_vs_service *svc, | |
2875 | struct netlink_callback *cb) | |
2876 | { | |
2877 | void *hdr; | |
2878 | ||
2879 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq, | |
2880 | &ip_vs_genl_family, NLM_F_MULTI, | |
2881 | IPVS_CMD_NEW_SERVICE); | |
2882 | if (!hdr) | |
2883 | return -EMSGSIZE; | |
2884 | ||
2885 | if (ip_vs_genl_fill_service(skb, svc) < 0) | |
2886 | goto nla_put_failure; | |
2887 | ||
2888 | return genlmsg_end(skb, hdr); | |
2889 | ||
2890 | nla_put_failure: | |
2891 | genlmsg_cancel(skb, hdr); | |
2892 | return -EMSGSIZE; | |
2893 | } | |
2894 | ||
2895 | static int ip_vs_genl_dump_services(struct sk_buff *skb, | |
2896 | struct netlink_callback *cb) | |
2897 | { | |
2898 | int idx = 0, i; | |
2899 | int start = cb->args[0]; | |
2900 | struct ip_vs_service *svc; | |
fc723250 | 2901 | struct net *net = skb_sknet(skb); |
9a812198 JV |
2902 | |
2903 | mutex_lock(&__ip_vs_mutex); | |
2904 | for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) { | |
2905 | list_for_each_entry(svc, &ip_vs_svc_table[i], s_list) { | |
fc723250 | 2906 | if (++idx <= start || !net_eq(svc->net, net)) |
9a812198 JV |
2907 | continue; |
2908 | if (ip_vs_genl_dump_service(skb, svc, cb) < 0) { | |
2909 | idx--; | |
2910 | goto nla_put_failure; | |
2911 | } | |
2912 | } | |
2913 | } | |
2914 | ||
2915 | for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) { | |
2916 | list_for_each_entry(svc, &ip_vs_svc_fwm_table[i], f_list) { | |
fc723250 | 2917 | if (++idx <= start || !net_eq(svc->net, net)) |
9a812198 JV |
2918 | continue; |
2919 | if (ip_vs_genl_dump_service(skb, svc, cb) < 0) { | |
2920 | idx--; | |
2921 | goto nla_put_failure; | |
2922 | } | |
2923 | } | |
2924 | } | |
2925 | ||
2926 | nla_put_failure: | |
2927 | mutex_unlock(&__ip_vs_mutex); | |
2928 | cb->args[0] = idx; | |
2929 | ||
2930 | return skb->len; | |
2931 | } | |
2932 | ||
fc723250 HS |
2933 | static int ip_vs_genl_parse_service(struct net *net, |
2934 | struct ip_vs_service_user_kern *usvc, | |
26c15cfd JA |
2935 | struct nlattr *nla, int full_entry, |
2936 | struct ip_vs_service **ret_svc) | |
9a812198 JV |
2937 | { |
2938 | struct nlattr *attrs[IPVS_SVC_ATTR_MAX + 1]; | |
2939 | struct nlattr *nla_af, *nla_port, *nla_fwmark, *nla_protocol, *nla_addr; | |
26c15cfd | 2940 | struct ip_vs_service *svc; |
9a812198 JV |
2941 | |
2942 | /* Parse mandatory identifying service fields first */ | |
2943 | if (nla == NULL || | |
2944 | nla_parse_nested(attrs, IPVS_SVC_ATTR_MAX, nla, ip_vs_svc_policy)) | |
2945 | return -EINVAL; | |
2946 | ||
2947 | nla_af = attrs[IPVS_SVC_ATTR_AF]; | |
2948 | nla_protocol = attrs[IPVS_SVC_ATTR_PROTOCOL]; | |
2949 | nla_addr = attrs[IPVS_SVC_ATTR_ADDR]; | |
2950 | nla_port = attrs[IPVS_SVC_ATTR_PORT]; | |
2951 | nla_fwmark = attrs[IPVS_SVC_ATTR_FWMARK]; | |
2952 | ||
2953 | if (!(nla_af && (nla_fwmark || (nla_port && nla_protocol && nla_addr)))) | |
2954 | return -EINVAL; | |
2955 | ||
258c8893 SH |
2956 | memset(usvc, 0, sizeof(*usvc)); |
2957 | ||
c860c6b1 | 2958 | usvc->af = nla_get_u16(nla_af); |
f94fd041 JV |
2959 | #ifdef CONFIG_IP_VS_IPV6 |
2960 | if (usvc->af != AF_INET && usvc->af != AF_INET6) | |
2961 | #else | |
2962 | if (usvc->af != AF_INET) | |
2963 | #endif | |
9a812198 JV |
2964 | return -EAFNOSUPPORT; |
2965 | ||
2966 | if (nla_fwmark) { | |
2967 | usvc->protocol = IPPROTO_TCP; | |
2968 | usvc->fwmark = nla_get_u32(nla_fwmark); | |
2969 | } else { | |
2970 | usvc->protocol = nla_get_u16(nla_protocol); | |
2971 | nla_memcpy(&usvc->addr, nla_addr, sizeof(usvc->addr)); | |
2972 | usvc->port = nla_get_u16(nla_port); | |
2973 | usvc->fwmark = 0; | |
2974 | } | |
2975 | ||
26c15cfd | 2976 | if (usvc->fwmark) |
fc723250 | 2977 | svc = __ip_vs_svc_fwm_find(net, usvc->af, usvc->fwmark); |
26c15cfd | 2978 | else |
fc723250 | 2979 | svc = __ip_vs_service_find(net, usvc->af, usvc->protocol, |
26c15cfd JA |
2980 | &usvc->addr, usvc->port); |
2981 | *ret_svc = svc; | |
2982 | ||
9a812198 JV |
2983 | /* If a full entry was requested, check for the additional fields */ |
2984 | if (full_entry) { | |
0d1e71b0 | 2985 | struct nlattr *nla_sched, *nla_flags, *nla_pe, *nla_timeout, |
9a812198 JV |
2986 | *nla_netmask; |
2987 | struct ip_vs_flags flags; | |
9a812198 JV |
2988 | |
2989 | nla_sched = attrs[IPVS_SVC_ATTR_SCHED_NAME]; | |
0d1e71b0 | 2990 | nla_pe = attrs[IPVS_SVC_ATTR_PE_NAME]; |
9a812198 JV |
2991 | nla_flags = attrs[IPVS_SVC_ATTR_FLAGS]; |
2992 | nla_timeout = attrs[IPVS_SVC_ATTR_TIMEOUT]; | |
2993 | nla_netmask = attrs[IPVS_SVC_ATTR_NETMASK]; | |
2994 | ||
2995 | if (!(nla_sched && nla_flags && nla_timeout && nla_netmask)) | |
2996 | return -EINVAL; | |
2997 | ||
2998 | nla_memcpy(&flags, nla_flags, sizeof(flags)); | |
2999 | ||
3000 | /* prefill flags from service if it already exists */ | |
26c15cfd | 3001 | if (svc) |
9a812198 | 3002 | usvc->flags = svc->flags; |
9a812198 JV |
3003 | |
3004 | /* set new flags from userland */ | |
3005 | usvc->flags = (usvc->flags & ~flags.mask) | | |
3006 | (flags.flags & flags.mask); | |
c860c6b1 | 3007 | usvc->sched_name = nla_data(nla_sched); |
0d1e71b0 | 3008 | usvc->pe_name = nla_pe ? nla_data(nla_pe) : NULL; |
9a812198 JV |
3009 | usvc->timeout = nla_get_u32(nla_timeout); |
3010 | usvc->netmask = nla_get_u32(nla_netmask); | |
3011 | } | |
3012 | ||
3013 | return 0; | |
3014 | } | |
3015 | ||
fc723250 HS |
3016 | static struct ip_vs_service *ip_vs_genl_find_service(struct net *net, |
3017 | struct nlattr *nla) | |
9a812198 | 3018 | { |
c860c6b1 | 3019 | struct ip_vs_service_user_kern usvc; |
26c15cfd | 3020 | struct ip_vs_service *svc; |
9a812198 JV |
3021 | int ret; |
3022 | ||
fc723250 | 3023 | ret = ip_vs_genl_parse_service(net, &usvc, nla, 0, &svc); |
26c15cfd | 3024 | return ret ? ERR_PTR(ret) : svc; |
9a812198 JV |
3025 | } |
3026 | ||
3027 | static int ip_vs_genl_fill_dest(struct sk_buff *skb, struct ip_vs_dest *dest) | |
3028 | { | |
3029 | struct nlattr *nl_dest; | |
3030 | ||
3031 | nl_dest = nla_nest_start(skb, IPVS_CMD_ATTR_DEST); | |
3032 | if (!nl_dest) | |
3033 | return -EMSGSIZE; | |
3034 | ||
3035 | NLA_PUT(skb, IPVS_DEST_ATTR_ADDR, sizeof(dest->addr), &dest->addr); | |
3036 | NLA_PUT_U16(skb, IPVS_DEST_ATTR_PORT, dest->port); | |
3037 | ||
3038 | NLA_PUT_U32(skb, IPVS_DEST_ATTR_FWD_METHOD, | |
3039 | atomic_read(&dest->conn_flags) & IP_VS_CONN_F_FWD_MASK); | |
3040 | NLA_PUT_U32(skb, IPVS_DEST_ATTR_WEIGHT, atomic_read(&dest->weight)); | |
3041 | NLA_PUT_U32(skb, IPVS_DEST_ATTR_U_THRESH, dest->u_threshold); | |
3042 | NLA_PUT_U32(skb, IPVS_DEST_ATTR_L_THRESH, dest->l_threshold); | |
3043 | NLA_PUT_U32(skb, IPVS_DEST_ATTR_ACTIVE_CONNS, | |
3044 | atomic_read(&dest->activeconns)); | |
3045 | NLA_PUT_U32(skb, IPVS_DEST_ATTR_INACT_CONNS, | |
3046 | atomic_read(&dest->inactconns)); | |
3047 | NLA_PUT_U32(skb, IPVS_DEST_ATTR_PERSIST_CONNS, | |
3048 | atomic_read(&dest->persistconns)); | |
3049 | ||
3050 | if (ip_vs_genl_fill_stats(skb, IPVS_DEST_ATTR_STATS, &dest->stats)) | |
3051 | goto nla_put_failure; | |
3052 | ||
3053 | nla_nest_end(skb, nl_dest); | |
3054 | ||
3055 | return 0; | |
3056 | ||
3057 | nla_put_failure: | |
3058 | nla_nest_cancel(skb, nl_dest); | |
3059 | return -EMSGSIZE; | |
3060 | } | |
3061 | ||
3062 | static int ip_vs_genl_dump_dest(struct sk_buff *skb, struct ip_vs_dest *dest, | |
3063 | struct netlink_callback *cb) | |
3064 | { | |
3065 | void *hdr; | |
3066 | ||
3067 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq, | |
3068 | &ip_vs_genl_family, NLM_F_MULTI, | |
3069 | IPVS_CMD_NEW_DEST); | |
3070 | if (!hdr) | |
3071 | return -EMSGSIZE; | |
3072 | ||
3073 | if (ip_vs_genl_fill_dest(skb, dest) < 0) | |
3074 | goto nla_put_failure; | |
3075 | ||
3076 | return genlmsg_end(skb, hdr); | |
3077 | ||
3078 | nla_put_failure: | |
3079 | genlmsg_cancel(skb, hdr); | |
3080 | return -EMSGSIZE; | |
3081 | } | |
3082 | ||
3083 | static int ip_vs_genl_dump_dests(struct sk_buff *skb, | |
3084 | struct netlink_callback *cb) | |
3085 | { | |
3086 | int idx = 0; | |
3087 | int start = cb->args[0]; | |
3088 | struct ip_vs_service *svc; | |
3089 | struct ip_vs_dest *dest; | |
3090 | struct nlattr *attrs[IPVS_CMD_ATTR_MAX + 1]; | |
a0840e2e | 3091 | struct net *net = skb_sknet(skb); |
9a812198 JV |
3092 | |
3093 | mutex_lock(&__ip_vs_mutex); | |
3094 | ||
3095 | /* Try to find the service for which to dump destinations */ | |
3096 | if (nlmsg_parse(cb->nlh, GENL_HDRLEN, attrs, | |
3097 | IPVS_CMD_ATTR_MAX, ip_vs_cmd_policy)) | |
3098 | goto out_err; | |
3099 | ||
a0840e2e | 3100 | |
fc723250 | 3101 | svc = ip_vs_genl_find_service(net, attrs[IPVS_CMD_ATTR_SERVICE]); |
9a812198 JV |
3102 | if (IS_ERR(svc) || svc == NULL) |
3103 | goto out_err; | |
3104 | ||
3105 | /* Dump the destinations */ | |
3106 | list_for_each_entry(dest, &svc->destinations, n_list) { | |
3107 | if (++idx <= start) | |
3108 | continue; | |
3109 | if (ip_vs_genl_dump_dest(skb, dest, cb) < 0) { | |
3110 | idx--; | |
3111 | goto nla_put_failure; | |
3112 | } | |
3113 | } | |
3114 | ||
3115 | nla_put_failure: | |
3116 | cb->args[0] = idx; | |
9a812198 JV |
3117 | |
3118 | out_err: | |
3119 | mutex_unlock(&__ip_vs_mutex); | |
3120 | ||
3121 | return skb->len; | |
3122 | } | |
3123 | ||
c860c6b1 | 3124 | static int ip_vs_genl_parse_dest(struct ip_vs_dest_user_kern *udest, |
9a812198 JV |
3125 | struct nlattr *nla, int full_entry) |
3126 | { | |
3127 | struct nlattr *attrs[IPVS_DEST_ATTR_MAX + 1]; | |
3128 | struct nlattr *nla_addr, *nla_port; | |
3129 | ||
3130 | /* Parse mandatory identifying destination fields first */ | |
3131 | if (nla == NULL || | |
3132 | nla_parse_nested(attrs, IPVS_DEST_ATTR_MAX, nla, ip_vs_dest_policy)) | |
3133 | return -EINVAL; | |
3134 | ||
3135 | nla_addr = attrs[IPVS_DEST_ATTR_ADDR]; | |
3136 | nla_port = attrs[IPVS_DEST_ATTR_PORT]; | |
3137 | ||
3138 | if (!(nla_addr && nla_port)) | |
3139 | return -EINVAL; | |
3140 | ||
258c8893 SH |
3141 | memset(udest, 0, sizeof(*udest)); |
3142 | ||
9a812198 JV |
3143 | nla_memcpy(&udest->addr, nla_addr, sizeof(udest->addr)); |
3144 | udest->port = nla_get_u16(nla_port); | |
3145 | ||
3146 | /* If a full entry was requested, check for the additional fields */ | |
3147 | if (full_entry) { | |
3148 | struct nlattr *nla_fwd, *nla_weight, *nla_u_thresh, | |
3149 | *nla_l_thresh; | |
3150 | ||
3151 | nla_fwd = attrs[IPVS_DEST_ATTR_FWD_METHOD]; | |
3152 | nla_weight = attrs[IPVS_DEST_ATTR_WEIGHT]; | |
3153 | nla_u_thresh = attrs[IPVS_DEST_ATTR_U_THRESH]; | |
3154 | nla_l_thresh = attrs[IPVS_DEST_ATTR_L_THRESH]; | |
3155 | ||
3156 | if (!(nla_fwd && nla_weight && nla_u_thresh && nla_l_thresh)) | |
3157 | return -EINVAL; | |
3158 | ||
3159 | udest->conn_flags = nla_get_u32(nla_fwd) | |
3160 | & IP_VS_CONN_F_FWD_MASK; | |
3161 | udest->weight = nla_get_u32(nla_weight); | |
3162 | udest->u_threshold = nla_get_u32(nla_u_thresh); | |
3163 | udest->l_threshold = nla_get_u32(nla_l_thresh); | |
3164 | } | |
3165 | ||
3166 | return 0; | |
3167 | } | |
3168 | ||
3169 | static int ip_vs_genl_fill_daemon(struct sk_buff *skb, __be32 state, | |
3170 | const char *mcast_ifn, __be32 syncid) | |
3171 | { | |
3172 | struct nlattr *nl_daemon; | |
3173 | ||
3174 | nl_daemon = nla_nest_start(skb, IPVS_CMD_ATTR_DAEMON); | |
3175 | if (!nl_daemon) | |
3176 | return -EMSGSIZE; | |
3177 | ||
3178 | NLA_PUT_U32(skb, IPVS_DAEMON_ATTR_STATE, state); | |
3179 | NLA_PUT_STRING(skb, IPVS_DAEMON_ATTR_MCAST_IFN, mcast_ifn); | |
3180 | NLA_PUT_U32(skb, IPVS_DAEMON_ATTR_SYNC_ID, syncid); | |
3181 | ||
3182 | nla_nest_end(skb, nl_daemon); | |
3183 | ||
3184 | return 0; | |
3185 | ||
3186 | nla_put_failure: | |
3187 | nla_nest_cancel(skb, nl_daemon); | |
3188 | return -EMSGSIZE; | |
3189 | } | |
3190 | ||
3191 | static int ip_vs_genl_dump_daemon(struct sk_buff *skb, __be32 state, | |
3192 | const char *mcast_ifn, __be32 syncid, | |
3193 | struct netlink_callback *cb) | |
3194 | { | |
3195 | void *hdr; | |
3196 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq, | |
3197 | &ip_vs_genl_family, NLM_F_MULTI, | |
3198 | IPVS_CMD_NEW_DAEMON); | |
3199 | if (!hdr) | |
3200 | return -EMSGSIZE; | |
3201 | ||
3202 | if (ip_vs_genl_fill_daemon(skb, state, mcast_ifn, syncid)) | |
3203 | goto nla_put_failure; | |
3204 | ||
3205 | return genlmsg_end(skb, hdr); | |
3206 | ||
3207 | nla_put_failure: | |
3208 | genlmsg_cancel(skb, hdr); | |
3209 | return -EMSGSIZE; | |
3210 | } | |
3211 | ||
3212 | static int ip_vs_genl_dump_daemons(struct sk_buff *skb, | |
3213 | struct netlink_callback *cb) | |
3214 | { | |
a09d1977 | 3215 | struct net *net = skb_sknet(skb); |
f131315f HS |
3216 | struct netns_ipvs *ipvs = net_ipvs(net); |
3217 | ||
ae1d48b2 | 3218 | mutex_lock(&ipvs->sync_mutex); |
f131315f | 3219 | if ((ipvs->sync_state & IP_VS_STATE_MASTER) && !cb->args[0]) { |
9a812198 | 3220 | if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_MASTER, |
f131315f HS |
3221 | ipvs->master_mcast_ifn, |
3222 | ipvs->master_syncid, cb) < 0) | |
9a812198 JV |
3223 | goto nla_put_failure; |
3224 | ||
3225 | cb->args[0] = 1; | |
3226 | } | |
3227 | ||
f131315f | 3228 | if ((ipvs->sync_state & IP_VS_STATE_BACKUP) && !cb->args[1]) { |
9a812198 | 3229 | if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_BACKUP, |
f131315f HS |
3230 | ipvs->backup_mcast_ifn, |
3231 | ipvs->backup_syncid, cb) < 0) | |
9a812198 JV |
3232 | goto nla_put_failure; |
3233 | ||
3234 | cb->args[1] = 1; | |
3235 | } | |
3236 | ||
3237 | nla_put_failure: | |
ae1d48b2 | 3238 | mutex_unlock(&ipvs->sync_mutex); |
9a812198 JV |
3239 | |
3240 | return skb->len; | |
3241 | } | |
3242 | ||
f131315f | 3243 | static int ip_vs_genl_new_daemon(struct net *net, struct nlattr **attrs) |
9a812198 JV |
3244 | { |
3245 | if (!(attrs[IPVS_DAEMON_ATTR_STATE] && | |
3246 | attrs[IPVS_DAEMON_ATTR_MCAST_IFN] && | |
3247 | attrs[IPVS_DAEMON_ATTR_SYNC_ID])) | |
3248 | return -EINVAL; | |
3249 | ||
f131315f HS |
3250 | return start_sync_thread(net, |
3251 | nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]), | |
9a812198 JV |
3252 | nla_data(attrs[IPVS_DAEMON_ATTR_MCAST_IFN]), |
3253 | nla_get_u32(attrs[IPVS_DAEMON_ATTR_SYNC_ID])); | |
3254 | } | |
3255 | ||
f131315f | 3256 | static int ip_vs_genl_del_daemon(struct net *net, struct nlattr **attrs) |
9a812198 JV |
3257 | { |
3258 | if (!attrs[IPVS_DAEMON_ATTR_STATE]) | |
3259 | return -EINVAL; | |
3260 | ||
f131315f HS |
3261 | return stop_sync_thread(net, |
3262 | nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE])); | |
9a812198 JV |
3263 | } |
3264 | ||
9330419d | 3265 | static int ip_vs_genl_set_config(struct net *net, struct nlattr **attrs) |
9a812198 JV |
3266 | { |
3267 | struct ip_vs_timeout_user t; | |
3268 | ||
9330419d | 3269 | __ip_vs_get_timeouts(net, &t); |
9a812198 JV |
3270 | |
3271 | if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP]) | |
3272 | t.tcp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP]); | |
3273 | ||
3274 | if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN]) | |
3275 | t.tcp_fin_timeout = | |
3276 | nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN]); | |
3277 | ||
3278 | if (attrs[IPVS_CMD_ATTR_TIMEOUT_UDP]) | |
3279 | t.udp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_UDP]); | |
3280 | ||
9330419d | 3281 | return ip_vs_set_timeout(net, &t); |
9a812198 JV |
3282 | } |
3283 | ||
ae1d48b2 | 3284 | static int ip_vs_genl_set_daemon(struct sk_buff *skb, struct genl_info *info) |
9a812198 | 3285 | { |
9a812198 | 3286 | int ret = 0, cmd; |
fc723250 | 3287 | struct net *net; |
a0840e2e | 3288 | struct netns_ipvs *ipvs; |
9a812198 | 3289 | |
fc723250 | 3290 | net = skb_sknet(skb); |
a0840e2e | 3291 | ipvs = net_ipvs(net); |
9a812198 JV |
3292 | cmd = info->genlhdr->cmd; |
3293 | ||
ae1d48b2 | 3294 | if (cmd == IPVS_CMD_NEW_DAEMON || cmd == IPVS_CMD_DEL_DAEMON) { |
9a812198 JV |
3295 | struct nlattr *daemon_attrs[IPVS_DAEMON_ATTR_MAX + 1]; |
3296 | ||
ae1d48b2 | 3297 | mutex_lock(&ipvs->sync_mutex); |
9a812198 JV |
3298 | if (!info->attrs[IPVS_CMD_ATTR_DAEMON] || |
3299 | nla_parse_nested(daemon_attrs, IPVS_DAEMON_ATTR_MAX, | |
3300 | info->attrs[IPVS_CMD_ATTR_DAEMON], | |
3301 | ip_vs_daemon_policy)) { | |
3302 | ret = -EINVAL; | |
3303 | goto out; | |
3304 | } | |
3305 | ||
3306 | if (cmd == IPVS_CMD_NEW_DAEMON) | |
f131315f | 3307 | ret = ip_vs_genl_new_daemon(net, daemon_attrs); |
9a812198 | 3308 | else |
f131315f | 3309 | ret = ip_vs_genl_del_daemon(net, daemon_attrs); |
ae1d48b2 HS |
3310 | out: |
3311 | mutex_unlock(&ipvs->sync_mutex); | |
3312 | } | |
3313 | return ret; | |
3314 | } | |
3315 | ||
3316 | static int ip_vs_genl_set_cmd(struct sk_buff *skb, struct genl_info *info) | |
3317 | { | |
3318 | struct ip_vs_service *svc = NULL; | |
3319 | struct ip_vs_service_user_kern usvc; | |
3320 | struct ip_vs_dest_user_kern udest; | |
3321 | int ret = 0, cmd; | |
3322 | int need_full_svc = 0, need_full_dest = 0; | |
3323 | struct net *net; | |
ae1d48b2 HS |
3324 | |
3325 | net = skb_sknet(skb); | |
ae1d48b2 HS |
3326 | cmd = info->genlhdr->cmd; |
3327 | ||
3328 | mutex_lock(&__ip_vs_mutex); | |
3329 | ||
3330 | if (cmd == IPVS_CMD_FLUSH) { | |
3331 | ret = ip_vs_flush(net); | |
3332 | goto out; | |
3333 | } else if (cmd == IPVS_CMD_SET_CONFIG) { | |
3334 | ret = ip_vs_genl_set_config(net, info->attrs); | |
9a812198 JV |
3335 | goto out; |
3336 | } else if (cmd == IPVS_CMD_ZERO && | |
3337 | !info->attrs[IPVS_CMD_ATTR_SERVICE]) { | |
fc723250 | 3338 | ret = ip_vs_zero_all(net); |
9a812198 JV |
3339 | goto out; |
3340 | } | |
3341 | ||
3342 | /* All following commands require a service argument, so check if we | |
3343 | * received a valid one. We need a full service specification when | |
3344 | * adding / editing a service. Only identifying members otherwise. */ | |
3345 | if (cmd == IPVS_CMD_NEW_SERVICE || cmd == IPVS_CMD_SET_SERVICE) | |
3346 | need_full_svc = 1; | |
3347 | ||
fc723250 | 3348 | ret = ip_vs_genl_parse_service(net, &usvc, |
9a812198 | 3349 | info->attrs[IPVS_CMD_ATTR_SERVICE], |
26c15cfd | 3350 | need_full_svc, &svc); |
9a812198 JV |
3351 | if (ret) |
3352 | goto out; | |
3353 | ||
9a812198 JV |
3354 | /* Unless we're adding a new service, the service must already exist */ |
3355 | if ((cmd != IPVS_CMD_NEW_SERVICE) && (svc == NULL)) { | |
3356 | ret = -ESRCH; | |
3357 | goto out; | |
3358 | } | |
3359 | ||
3360 | /* Destination commands require a valid destination argument. For | |
3361 | * adding / editing a destination, we need a full destination | |
3362 | * specification. */ | |
3363 | if (cmd == IPVS_CMD_NEW_DEST || cmd == IPVS_CMD_SET_DEST || | |
3364 | cmd == IPVS_CMD_DEL_DEST) { | |
3365 | if (cmd != IPVS_CMD_DEL_DEST) | |
3366 | need_full_dest = 1; | |
3367 | ||
3368 | ret = ip_vs_genl_parse_dest(&udest, | |
3369 | info->attrs[IPVS_CMD_ATTR_DEST], | |
3370 | need_full_dest); | |
3371 | if (ret) | |
3372 | goto out; | |
3373 | } | |
3374 | ||
3375 | switch (cmd) { | |
3376 | case IPVS_CMD_NEW_SERVICE: | |
3377 | if (svc == NULL) | |
fc723250 | 3378 | ret = ip_vs_add_service(net, &usvc, &svc); |
9a812198 JV |
3379 | else |
3380 | ret = -EEXIST; | |
3381 | break; | |
3382 | case IPVS_CMD_SET_SERVICE: | |
3383 | ret = ip_vs_edit_service(svc, &usvc); | |
3384 | break; | |
3385 | case IPVS_CMD_DEL_SERVICE: | |
3386 | ret = ip_vs_del_service(svc); | |
26c15cfd | 3387 | /* do not use svc, it can be freed */ |
9a812198 JV |
3388 | break; |
3389 | case IPVS_CMD_NEW_DEST: | |
3390 | ret = ip_vs_add_dest(svc, &udest); | |
3391 | break; | |
3392 | case IPVS_CMD_SET_DEST: | |
3393 | ret = ip_vs_edit_dest(svc, &udest); | |
3394 | break; | |
3395 | case IPVS_CMD_DEL_DEST: | |
3396 | ret = ip_vs_del_dest(svc, &udest); | |
3397 | break; | |
3398 | case IPVS_CMD_ZERO: | |
3399 | ret = ip_vs_zero_service(svc); | |
3400 | break; | |
3401 | default: | |
3402 | ret = -EINVAL; | |
3403 | } | |
3404 | ||
3405 | out: | |
9a812198 JV |
3406 | mutex_unlock(&__ip_vs_mutex); |
3407 | ||
3408 | return ret; | |
3409 | } | |
3410 | ||
3411 | static int ip_vs_genl_get_cmd(struct sk_buff *skb, struct genl_info *info) | |
3412 | { | |
3413 | struct sk_buff *msg; | |
3414 | void *reply; | |
3415 | int ret, cmd, reply_cmd; | |
fc723250 | 3416 | struct net *net; |
9a812198 | 3417 | |
fc723250 | 3418 | net = skb_sknet(skb); |
9a812198 JV |
3419 | cmd = info->genlhdr->cmd; |
3420 | ||
3421 | if (cmd == IPVS_CMD_GET_SERVICE) | |
3422 | reply_cmd = IPVS_CMD_NEW_SERVICE; | |
3423 | else if (cmd == IPVS_CMD_GET_INFO) | |
3424 | reply_cmd = IPVS_CMD_SET_INFO; | |
3425 | else if (cmd == IPVS_CMD_GET_CONFIG) | |
3426 | reply_cmd = IPVS_CMD_SET_CONFIG; | |
3427 | else { | |
1e3e238e | 3428 | pr_err("unknown Generic Netlink command\n"); |
9a812198 JV |
3429 | return -EINVAL; |
3430 | } | |
3431 | ||
3432 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
3433 | if (!msg) | |
3434 | return -ENOMEM; | |
3435 | ||
3436 | mutex_lock(&__ip_vs_mutex); | |
3437 | ||
3438 | reply = genlmsg_put_reply(msg, info, &ip_vs_genl_family, 0, reply_cmd); | |
3439 | if (reply == NULL) | |
3440 | goto nla_put_failure; | |
3441 | ||
3442 | switch (cmd) { | |
3443 | case IPVS_CMD_GET_SERVICE: | |
3444 | { | |
3445 | struct ip_vs_service *svc; | |
3446 | ||
fc723250 HS |
3447 | svc = ip_vs_genl_find_service(net, |
3448 | info->attrs[IPVS_CMD_ATTR_SERVICE]); | |
9a812198 JV |
3449 | if (IS_ERR(svc)) { |
3450 | ret = PTR_ERR(svc); | |
3451 | goto out_err; | |
3452 | } else if (svc) { | |
3453 | ret = ip_vs_genl_fill_service(msg, svc); | |
9a812198 JV |
3454 | if (ret) |
3455 | goto nla_put_failure; | |
3456 | } else { | |
3457 | ret = -ESRCH; | |
3458 | goto out_err; | |
3459 | } | |
3460 | ||
3461 | break; | |
3462 | } | |
3463 | ||
3464 | case IPVS_CMD_GET_CONFIG: | |
3465 | { | |
3466 | struct ip_vs_timeout_user t; | |
3467 | ||
9330419d | 3468 | __ip_vs_get_timeouts(net, &t); |
9a812198 JV |
3469 | #ifdef CONFIG_IP_VS_PROTO_TCP |
3470 | NLA_PUT_U32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP, t.tcp_timeout); | |
3471 | NLA_PUT_U32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP_FIN, | |
3472 | t.tcp_fin_timeout); | |
3473 | #endif | |
3474 | #ifdef CONFIG_IP_VS_PROTO_UDP | |
3475 | NLA_PUT_U32(msg, IPVS_CMD_ATTR_TIMEOUT_UDP, t.udp_timeout); | |
3476 | #endif | |
3477 | ||
3478 | break; | |
3479 | } | |
3480 | ||
3481 | case IPVS_CMD_GET_INFO: | |
3482 | NLA_PUT_U32(msg, IPVS_INFO_ATTR_VERSION, IP_VS_VERSION_CODE); | |
3483 | NLA_PUT_U32(msg, IPVS_INFO_ATTR_CONN_TAB_SIZE, | |
6f7edb48 | 3484 | ip_vs_conn_tab_size); |
9a812198 JV |
3485 | break; |
3486 | } | |
3487 | ||
3488 | genlmsg_end(msg, reply); | |
134e6375 | 3489 | ret = genlmsg_reply(msg, info); |
9a812198 JV |
3490 | goto out; |
3491 | ||
3492 | nla_put_failure: | |
1e3e238e | 3493 | pr_err("not enough space in Netlink message\n"); |
9a812198 JV |
3494 | ret = -EMSGSIZE; |
3495 | ||
3496 | out_err: | |
3497 | nlmsg_free(msg); | |
3498 | out: | |
3499 | mutex_unlock(&__ip_vs_mutex); | |
3500 | ||
3501 | return ret; | |
3502 | } | |
3503 | ||
3504 | ||
3505 | static struct genl_ops ip_vs_genl_ops[] __read_mostly = { | |
3506 | { | |
3507 | .cmd = IPVS_CMD_NEW_SERVICE, | |
3508 | .flags = GENL_ADMIN_PERM, | |
3509 | .policy = ip_vs_cmd_policy, | |
3510 | .doit = ip_vs_genl_set_cmd, | |
3511 | }, | |
3512 | { | |
3513 | .cmd = IPVS_CMD_SET_SERVICE, | |
3514 | .flags = GENL_ADMIN_PERM, | |
3515 | .policy = ip_vs_cmd_policy, | |
3516 | .doit = ip_vs_genl_set_cmd, | |
3517 | }, | |
3518 | { | |
3519 | .cmd = IPVS_CMD_DEL_SERVICE, | |
3520 | .flags = GENL_ADMIN_PERM, | |
3521 | .policy = ip_vs_cmd_policy, | |
3522 | .doit = ip_vs_genl_set_cmd, | |
3523 | }, | |
3524 | { | |
3525 | .cmd = IPVS_CMD_GET_SERVICE, | |
3526 | .flags = GENL_ADMIN_PERM, | |
3527 | .doit = ip_vs_genl_get_cmd, | |
3528 | .dumpit = ip_vs_genl_dump_services, | |
3529 | .policy = ip_vs_cmd_policy, | |
3530 | }, | |
3531 | { | |
3532 | .cmd = IPVS_CMD_NEW_DEST, | |
3533 | .flags = GENL_ADMIN_PERM, | |
3534 | .policy = ip_vs_cmd_policy, | |
3535 | .doit = ip_vs_genl_set_cmd, | |
3536 | }, | |
3537 | { | |
3538 | .cmd = IPVS_CMD_SET_DEST, | |
3539 | .flags = GENL_ADMIN_PERM, | |
3540 | .policy = ip_vs_cmd_policy, | |
3541 | .doit = ip_vs_genl_set_cmd, | |
3542 | }, | |
3543 | { | |
3544 | .cmd = IPVS_CMD_DEL_DEST, | |
3545 | .flags = GENL_ADMIN_PERM, | |
3546 | .policy = ip_vs_cmd_policy, | |
3547 | .doit = ip_vs_genl_set_cmd, | |
3548 | }, | |
3549 | { | |
3550 | .cmd = IPVS_CMD_GET_DEST, | |
3551 | .flags = GENL_ADMIN_PERM, | |
3552 | .policy = ip_vs_cmd_policy, | |
3553 | .dumpit = ip_vs_genl_dump_dests, | |
3554 | }, | |
3555 | { | |
3556 | .cmd = IPVS_CMD_NEW_DAEMON, | |
3557 | .flags = GENL_ADMIN_PERM, | |
3558 | .policy = ip_vs_cmd_policy, | |
ae1d48b2 | 3559 | .doit = ip_vs_genl_set_daemon, |
9a812198 JV |
3560 | }, |
3561 | { | |
3562 | .cmd = IPVS_CMD_DEL_DAEMON, | |
3563 | .flags = GENL_ADMIN_PERM, | |
3564 | .policy = ip_vs_cmd_policy, | |
ae1d48b2 | 3565 | .doit = ip_vs_genl_set_daemon, |
9a812198 JV |
3566 | }, |
3567 | { | |
3568 | .cmd = IPVS_CMD_GET_DAEMON, | |
3569 | .flags = GENL_ADMIN_PERM, | |
3570 | .dumpit = ip_vs_genl_dump_daemons, | |
3571 | }, | |
3572 | { | |
3573 | .cmd = IPVS_CMD_SET_CONFIG, | |
3574 | .flags = GENL_ADMIN_PERM, | |
3575 | .policy = ip_vs_cmd_policy, | |
3576 | .doit = ip_vs_genl_set_cmd, | |
3577 | }, | |
3578 | { | |
3579 | .cmd = IPVS_CMD_GET_CONFIG, | |
3580 | .flags = GENL_ADMIN_PERM, | |
3581 | .doit = ip_vs_genl_get_cmd, | |
3582 | }, | |
3583 | { | |
3584 | .cmd = IPVS_CMD_GET_INFO, | |
3585 | .flags = GENL_ADMIN_PERM, | |
3586 | .doit = ip_vs_genl_get_cmd, | |
3587 | }, | |
3588 | { | |
3589 | .cmd = IPVS_CMD_ZERO, | |
3590 | .flags = GENL_ADMIN_PERM, | |
3591 | .policy = ip_vs_cmd_policy, | |
3592 | .doit = ip_vs_genl_set_cmd, | |
3593 | }, | |
3594 | { | |
3595 | .cmd = IPVS_CMD_FLUSH, | |
3596 | .flags = GENL_ADMIN_PERM, | |
3597 | .doit = ip_vs_genl_set_cmd, | |
3598 | }, | |
3599 | }; | |
3600 | ||
3601 | static int __init ip_vs_genl_register(void) | |
3602 | { | |
8f698d54 MM |
3603 | return genl_register_family_with_ops(&ip_vs_genl_family, |
3604 | ip_vs_genl_ops, ARRAY_SIZE(ip_vs_genl_ops)); | |
9a812198 JV |
3605 | } |
3606 | ||
3607 | static void ip_vs_genl_unregister(void) | |
3608 | { | |
3609 | genl_unregister_family(&ip_vs_genl_family); | |
3610 | } | |
3611 | ||
3612 | /* End of Generic Netlink interface definitions */ | |
3613 | ||
61b1ab45 HS |
3614 | /* |
3615 | * per netns intit/exit func. | |
3616 | */ | |
14e40546 | 3617 | #ifdef CONFIG_SYSCTL |
503cf15a | 3618 | int __net_init ip_vs_control_net_init_sysctl(struct net *net) |
61b1ab45 | 3619 | { |
fc723250 HS |
3620 | int idx; |
3621 | struct netns_ipvs *ipvs = net_ipvs(net); | |
a0840e2e | 3622 | struct ctl_table *tbl; |
fc723250 | 3623 | |
a0840e2e HS |
3624 | atomic_set(&ipvs->dropentry, 0); |
3625 | spin_lock_init(&ipvs->dropentry_lock); | |
3626 | spin_lock_init(&ipvs->droppacket_lock); | |
3627 | spin_lock_init(&ipvs->securetcp_lock); | |
a0840e2e HS |
3628 | |
3629 | if (!net_eq(net, &init_net)) { | |
3630 | tbl = kmemdup(vs_vars, sizeof(vs_vars), GFP_KERNEL); | |
3631 | if (tbl == NULL) | |
14e40546 | 3632 | return -ENOMEM; |
a0840e2e HS |
3633 | } else |
3634 | tbl = vs_vars; | |
3635 | /* Initialize sysctl defaults */ | |
3636 | idx = 0; | |
3637 | ipvs->sysctl_amemthresh = 1024; | |
3638 | tbl[idx++].data = &ipvs->sysctl_amemthresh; | |
3639 | ipvs->sysctl_am_droprate = 10; | |
3640 | tbl[idx++].data = &ipvs->sysctl_am_droprate; | |
3641 | tbl[idx++].data = &ipvs->sysctl_drop_entry; | |
3642 | tbl[idx++].data = &ipvs->sysctl_drop_packet; | |
3643 | #ifdef CONFIG_IP_VS_NFCT | |
3644 | tbl[idx++].data = &ipvs->sysctl_conntrack; | |
3645 | #endif | |
3646 | tbl[idx++].data = &ipvs->sysctl_secure_tcp; | |
3647 | ipvs->sysctl_snat_reroute = 1; | |
3648 | tbl[idx++].data = &ipvs->sysctl_snat_reroute; | |
3649 | ipvs->sysctl_sync_ver = 1; | |
3650 | tbl[idx++].data = &ipvs->sysctl_sync_ver; | |
3651 | tbl[idx++].data = &ipvs->sysctl_cache_bypass; | |
3652 | tbl[idx++].data = &ipvs->sysctl_expire_nodest_conn; | |
3653 | tbl[idx++].data = &ipvs->sysctl_expire_quiescent_template; | |
59e0350e SH |
3654 | ipvs->sysctl_sync_threshold[0] = DEFAULT_SYNC_THRESHOLD; |
3655 | ipvs->sysctl_sync_threshold[1] = DEFAULT_SYNC_PERIOD; | |
a0840e2e HS |
3656 | tbl[idx].data = &ipvs->sysctl_sync_threshold; |
3657 | tbl[idx++].maxlen = sizeof(ipvs->sysctl_sync_threshold); | |
3658 | tbl[idx++].data = &ipvs->sysctl_nat_icmp_send; | |
3659 | ||
3660 | ||
3661 | ipvs->sysctl_hdr = register_net_sysctl_table(net, net_vs_ctl_path, | |
07924709 | 3662 | tbl); |
0443929f SH |
3663 | if (ipvs->sysctl_hdr == NULL) { |
3664 | if (!net_eq(net, &init_net)) | |
3665 | kfree(tbl); | |
14e40546 | 3666 | return -ENOMEM; |
0443929f | 3667 | } |
6ef757f9 | 3668 | ip_vs_start_estimator(net, &ipvs->tot_stats); |
a0840e2e | 3669 | ipvs->sysctl_tbl = tbl; |
f6340ee0 HS |
3670 | /* Schedule defense work */ |
3671 | INIT_DELAYED_WORK(&ipvs->defense_work, defense_work_handler); | |
3672 | schedule_delayed_work(&ipvs->defense_work, DEFENSE_TIMER_PERIOD); | |
61b1ab45 | 3673 | |
61b1ab45 | 3674 | return 0; |
61b1ab45 HS |
3675 | } |
3676 | ||
503cf15a | 3677 | void __net_init ip_vs_control_net_cleanup_sysctl(struct net *net) |
61b1ab45 | 3678 | { |
b17fc996 HS |
3679 | struct netns_ipvs *ipvs = net_ipvs(net); |
3680 | ||
f2431e6e HS |
3681 | cancel_delayed_work_sync(&ipvs->defense_work); |
3682 | cancel_work_sync(&ipvs->defense_work.work); | |
a0840e2e | 3683 | unregister_net_sysctl_table(ipvs->sysctl_hdr); |
14e40546 SH |
3684 | } |
3685 | ||
3686 | #else | |
3687 | ||
503cf15a HS |
3688 | int __net_init ip_vs_control_net_init_sysctl(struct net *net) { return 0; } |
3689 | void __net_init ip_vs_control_net_cleanup_sysctl(struct net *net) { } | |
14e40546 | 3690 | |
0443929f | 3691 | #endif |
14e40546 | 3692 | |
7a4f0761 HS |
3693 | static struct notifier_block ip_vs_dst_notifier = { |
3694 | .notifier_call = ip_vs_dst_event, | |
3695 | }; | |
3696 | ||
503cf15a | 3697 | int __net_init ip_vs_control_net_init(struct net *net) |
14e40546 SH |
3698 | { |
3699 | int idx; | |
3700 | struct netns_ipvs *ipvs = net_ipvs(net); | |
3701 | ||
3458e21c | 3702 | rwlock_init(&ipvs->rs_lock); |
14e40546 SH |
3703 | |
3704 | /* Initialize rs_table */ | |
3705 | for (idx = 0; idx < IP_VS_RTAB_SIZE; idx++) | |
3706 | INIT_LIST_HEAD(&ipvs->rs_table[idx]); | |
3707 | ||
3708 | INIT_LIST_HEAD(&ipvs->dest_trash); | |
3709 | atomic_set(&ipvs->ftpsvc_counter, 0); | |
3710 | atomic_set(&ipvs->nullsvc_counter, 0); | |
3711 | ||
3712 | /* procfs stats */ | |
3713 | ipvs->tot_stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats); | |
0a9ee813 | 3714 | if (!ipvs->tot_stats.cpustats) |
14e40546 | 3715 | return -ENOMEM; |
0a9ee813 | 3716 | |
14e40546 SH |
3717 | spin_lock_init(&ipvs->tot_stats.lock); |
3718 | ||
3719 | proc_net_fops_create(net, "ip_vs", 0, &ip_vs_info_fops); | |
3720 | proc_net_fops_create(net, "ip_vs_stats", 0, &ip_vs_stats_fops); | |
3721 | proc_net_fops_create(net, "ip_vs_stats_percpu", 0, | |
3722 | &ip_vs_stats_percpu_fops); | |
3723 | ||
503cf15a | 3724 | if (ip_vs_control_net_init_sysctl(net)) |
14e40546 SH |
3725 | goto err; |
3726 | ||
3727 | return 0; | |
3728 | ||
3729 | err: | |
2a0751af | 3730 | free_percpu(ipvs->tot_stats.cpustats); |
61b1ab45 HS |
3731 | return -ENOMEM; |
3732 | } | |
3733 | ||
503cf15a | 3734 | void __net_exit ip_vs_control_net_cleanup(struct net *net) |
61b1ab45 | 3735 | { |
b17fc996 HS |
3736 | struct netns_ipvs *ipvs = net_ipvs(net); |
3737 | ||
f2431e6e | 3738 | ip_vs_trash_cleanup(net); |
6ef757f9 | 3739 | ip_vs_stop_estimator(net, &ipvs->tot_stats); |
503cf15a | 3740 | ip_vs_control_net_cleanup_sysctl(net); |
b17fc996 | 3741 | proc_net_remove(net, "ip_vs_stats_percpu"); |
61b1ab45 HS |
3742 | proc_net_remove(net, "ip_vs_stats"); |
3743 | proc_net_remove(net, "ip_vs"); | |
2a0751af | 3744 | free_percpu(ipvs->tot_stats.cpustats); |
61b1ab45 HS |
3745 | } |
3746 | ||
048cf48b | 3747 | int __init ip_vs_control_init(void) |
1da177e4 | 3748 | { |
1da177e4 | 3749 | int idx; |
fc723250 | 3750 | int ret; |
1da177e4 LT |
3751 | |
3752 | EnterFunction(2); | |
3753 | ||
fc723250 | 3754 | /* Initialize svc_table, ip_vs_svc_fwm_table, rs_table */ |
d86bef73 EB |
3755 | for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { |
3756 | INIT_LIST_HEAD(&ip_vs_svc_table[idx]); | |
3757 | INIT_LIST_HEAD(&ip_vs_svc_fwm_table[idx]); | |
3758 | } | |
fc723250 | 3759 | |
fc723250 | 3760 | smp_wmb(); /* Do we really need it now ? */ |
d86bef73 | 3761 | |
1da177e4 LT |
3762 | ret = nf_register_sockopt(&ip_vs_sockopts); |
3763 | if (ret) { | |
1e3e238e | 3764 | pr_err("cannot register sockopt.\n"); |
7a4f0761 | 3765 | goto err_sock; |
1da177e4 LT |
3766 | } |
3767 | ||
9a812198 JV |
3768 | ret = ip_vs_genl_register(); |
3769 | if (ret) { | |
1e3e238e | 3770 | pr_err("cannot register Generic Netlink interface.\n"); |
7a4f0761 | 3771 | goto err_genl; |
9a812198 JV |
3772 | } |
3773 | ||
7a4f0761 HS |
3774 | ret = register_netdevice_notifier(&ip_vs_dst_notifier); |
3775 | if (ret < 0) | |
3776 | goto err_notf; | |
3777 | ||
1da177e4 LT |
3778 | LeaveFunction(2); |
3779 | return 0; | |
fc723250 | 3780 | |
7a4f0761 HS |
3781 | err_notf: |
3782 | ip_vs_genl_unregister(); | |
3783 | err_genl: | |
3784 | nf_unregister_sockopt(&ip_vs_sockopts); | |
3785 | err_sock: | |
fc723250 | 3786 | return ret; |
1da177e4 LT |
3787 | } |
3788 | ||
3789 | ||
3790 | void ip_vs_control_cleanup(void) | |
3791 | { | |
3792 | EnterFunction(2); | |
7676e345 | 3793 | unregister_netdevice_notifier(&ip_vs_dst_notifier); |
9a812198 | 3794 | ip_vs_genl_unregister(); |
1da177e4 LT |
3795 | nf_unregister_sockopt(&ip_vs_sockopts); |
3796 | LeaveFunction(2); | |
3797 | } |