Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| 21 | #include <linux/module.h> |
| 22 | #include <linux/init.h> |
| 23 | #include <linux/types.h> |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 24 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include <linux/fs.h> |
| 26 | #include <linux/sysctl.h> |
| 27 | #include <linux/proc_fs.h> |
| 28 | #include <linux/workqueue.h> |
| 29 | #include <linux/swap.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <linux/seq_file.h> |
| 31 | |
| 32 | #include <linux/netfilter.h> |
| 33 | #include <linux/netfilter_ipv4.h> |
Ingo Molnar | 14cc3e2 | 2006-03-26 01:37:14 -0800 | [diff] [blame] | 34 | #include <linux/mutex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 36 | #include <net/net_namespace.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #include <net/ip.h> |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 38 | #include <net/route.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include <net/sock.h> |
Julius Volz | 9a81219 | 2008-08-14 14:08:44 +0200 | [diff] [blame] | 40 | #include <net/genetlink.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
| 42 | #include <asm/uaccess.h> |
| 43 | |
| 44 | #include <net/ip_vs.h> |
| 45 | |
| 46 | /* semaphore for IPVS sockopts. And, [gs]etsockopt may sleep. */ |
Ingo Molnar | 14cc3e2 | 2006-03-26 01:37:14 -0800 | [diff] [blame] | 47 | static DEFINE_MUTEX(__ip_vs_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | |
| 49 | /* lock for service table */ |
| 50 | static DEFINE_RWLOCK(__ip_vs_svc_lock); |
| 51 | |
| 52 | /* lock for table with the real services */ |
| 53 | static DEFINE_RWLOCK(__ip_vs_rs_lock); |
| 54 | |
| 55 | /* lock for state and timeout tables */ |
| 56 | static DEFINE_RWLOCK(__ip_vs_securetcp_lock); |
| 57 | |
| 58 | /* lock for drop entry handling */ |
| 59 | static DEFINE_SPINLOCK(__ip_vs_dropentry_lock); |
| 60 | |
| 61 | /* lock for drop packet handling */ |
| 62 | static DEFINE_SPINLOCK(__ip_vs_droppacket_lock); |
| 63 | |
| 64 | /* 1/rate drop and drop-entry variables */ |
| 65 | int ip_vs_drop_rate = 0; |
| 66 | int ip_vs_drop_counter = 0; |
| 67 | static atomic_t ip_vs_dropentry = ATOMIC_INIT(0); |
| 68 | |
| 69 | /* number of virtual services */ |
| 70 | static int ip_vs_num_services = 0; |
| 71 | |
| 72 | /* sysctl variables */ |
| 73 | static int sysctl_ip_vs_drop_entry = 0; |
| 74 | static int sysctl_ip_vs_drop_packet = 0; |
| 75 | static int sysctl_ip_vs_secure_tcp = 0; |
| 76 | static int sysctl_ip_vs_amemthresh = 1024; |
| 77 | static int sysctl_ip_vs_am_droprate = 10; |
| 78 | int sysctl_ip_vs_cache_bypass = 0; |
| 79 | int sysctl_ip_vs_expire_nodest_conn = 0; |
| 80 | int sysctl_ip_vs_expire_quiescent_template = 0; |
| 81 | int sysctl_ip_vs_sync_threshold[2] = { 3, 50 }; |
| 82 | int sysctl_ip_vs_nat_icmp_send = 0; |
| 83 | |
| 84 | |
| 85 | #ifdef CONFIG_IP_VS_DEBUG |
| 86 | static int sysctl_ip_vs_debug_level = 0; |
| 87 | |
| 88 | int ip_vs_get_debug_level(void) |
| 89 | { |
| 90 | return sysctl_ip_vs_debug_level; |
| 91 | } |
| 92 | #endif |
| 93 | |
| 94 | /* |
Julian Anastasov | af9debd | 2005-07-11 20:59:57 -0700 | [diff] [blame] | 95 | * update_defense_level is called from keventd and from sysctl, |
| 96 | * so it needs to protect itself from softirqs |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | */ |
| 98 | static void update_defense_level(void) |
| 99 | { |
| 100 | struct sysinfo i; |
| 101 | static int old_secure_tcp = 0; |
| 102 | int availmem; |
| 103 | int nomem; |
| 104 | int to_change = -1; |
| 105 | |
| 106 | /* we only count free and buffered memory (in pages) */ |
| 107 | si_meminfo(&i); |
| 108 | availmem = i.freeram + i.bufferram; |
| 109 | /* however in linux 2.5 the i.bufferram is total page cache size, |
| 110 | we need adjust it */ |
| 111 | /* si_swapinfo(&i); */ |
| 112 | /* availmem = availmem - (i.totalswap - i.freeswap); */ |
| 113 | |
| 114 | nomem = (availmem < sysctl_ip_vs_amemthresh); |
| 115 | |
Julian Anastasov | af9debd | 2005-07-11 20:59:57 -0700 | [diff] [blame] | 116 | local_bh_disable(); |
| 117 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | /* drop_entry */ |
| 119 | spin_lock(&__ip_vs_dropentry_lock); |
| 120 | switch (sysctl_ip_vs_drop_entry) { |
| 121 | case 0: |
| 122 | atomic_set(&ip_vs_dropentry, 0); |
| 123 | break; |
| 124 | case 1: |
| 125 | if (nomem) { |
| 126 | atomic_set(&ip_vs_dropentry, 1); |
| 127 | sysctl_ip_vs_drop_entry = 2; |
| 128 | } else { |
| 129 | atomic_set(&ip_vs_dropentry, 0); |
| 130 | } |
| 131 | break; |
| 132 | case 2: |
| 133 | if (nomem) { |
| 134 | atomic_set(&ip_vs_dropentry, 1); |
| 135 | } else { |
| 136 | atomic_set(&ip_vs_dropentry, 0); |
| 137 | sysctl_ip_vs_drop_entry = 1; |
| 138 | }; |
| 139 | break; |
| 140 | case 3: |
| 141 | atomic_set(&ip_vs_dropentry, 1); |
| 142 | break; |
| 143 | } |
| 144 | spin_unlock(&__ip_vs_dropentry_lock); |
| 145 | |
| 146 | /* drop_packet */ |
| 147 | spin_lock(&__ip_vs_droppacket_lock); |
| 148 | switch (sysctl_ip_vs_drop_packet) { |
| 149 | case 0: |
| 150 | ip_vs_drop_rate = 0; |
| 151 | break; |
| 152 | case 1: |
| 153 | if (nomem) { |
| 154 | ip_vs_drop_rate = ip_vs_drop_counter |
| 155 | = sysctl_ip_vs_amemthresh / |
| 156 | (sysctl_ip_vs_amemthresh-availmem); |
| 157 | sysctl_ip_vs_drop_packet = 2; |
| 158 | } else { |
| 159 | ip_vs_drop_rate = 0; |
| 160 | } |
| 161 | break; |
| 162 | case 2: |
| 163 | if (nomem) { |
| 164 | ip_vs_drop_rate = ip_vs_drop_counter |
| 165 | = sysctl_ip_vs_amemthresh / |
| 166 | (sysctl_ip_vs_amemthresh-availmem); |
| 167 | } else { |
| 168 | ip_vs_drop_rate = 0; |
| 169 | sysctl_ip_vs_drop_packet = 1; |
| 170 | } |
| 171 | break; |
| 172 | case 3: |
| 173 | ip_vs_drop_rate = sysctl_ip_vs_am_droprate; |
| 174 | break; |
| 175 | } |
| 176 | spin_unlock(&__ip_vs_droppacket_lock); |
| 177 | |
| 178 | /* secure_tcp */ |
| 179 | write_lock(&__ip_vs_securetcp_lock); |
| 180 | switch (sysctl_ip_vs_secure_tcp) { |
| 181 | case 0: |
| 182 | if (old_secure_tcp >= 2) |
| 183 | to_change = 0; |
| 184 | break; |
| 185 | case 1: |
| 186 | if (nomem) { |
| 187 | if (old_secure_tcp < 2) |
| 188 | to_change = 1; |
| 189 | sysctl_ip_vs_secure_tcp = 2; |
| 190 | } else { |
| 191 | if (old_secure_tcp >= 2) |
| 192 | to_change = 0; |
| 193 | } |
| 194 | break; |
| 195 | case 2: |
| 196 | if (nomem) { |
| 197 | if (old_secure_tcp < 2) |
| 198 | to_change = 1; |
| 199 | } else { |
| 200 | if (old_secure_tcp >= 2) |
| 201 | to_change = 0; |
| 202 | sysctl_ip_vs_secure_tcp = 1; |
| 203 | } |
| 204 | break; |
| 205 | case 3: |
| 206 | if (old_secure_tcp < 2) |
| 207 | to_change = 1; |
| 208 | break; |
| 209 | } |
| 210 | old_secure_tcp = sysctl_ip_vs_secure_tcp; |
| 211 | if (to_change >= 0) |
| 212 | ip_vs_protocol_timeout_change(sysctl_ip_vs_secure_tcp>1); |
| 213 | write_unlock(&__ip_vs_securetcp_lock); |
Julian Anastasov | af9debd | 2005-07-11 20:59:57 -0700 | [diff] [blame] | 214 | |
| 215 | local_bh_enable(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | } |
| 217 | |
| 218 | |
| 219 | /* |
| 220 | * Timer for checking the defense |
| 221 | */ |
| 222 | #define DEFENSE_TIMER_PERIOD 1*HZ |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 223 | static void defense_work_handler(struct work_struct *work); |
| 224 | static DECLARE_DELAYED_WORK(defense_work, defense_work_handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 226 | static void defense_work_handler(struct work_struct *work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | { |
| 228 | update_defense_level(); |
| 229 | if (atomic_read(&ip_vs_dropentry)) |
| 230 | ip_vs_random_dropentry(); |
| 231 | |
| 232 | schedule_delayed_work(&defense_work, DEFENSE_TIMER_PERIOD); |
| 233 | } |
| 234 | |
| 235 | int |
| 236 | ip_vs_use_count_inc(void) |
| 237 | { |
| 238 | return try_module_get(THIS_MODULE); |
| 239 | } |
| 240 | |
| 241 | void |
| 242 | ip_vs_use_count_dec(void) |
| 243 | { |
| 244 | module_put(THIS_MODULE); |
| 245 | } |
| 246 | |
| 247 | |
| 248 | /* |
| 249 | * Hash table: for virtual service lookups |
| 250 | */ |
| 251 | #define IP_VS_SVC_TAB_BITS 8 |
| 252 | #define IP_VS_SVC_TAB_SIZE (1 << IP_VS_SVC_TAB_BITS) |
| 253 | #define IP_VS_SVC_TAB_MASK (IP_VS_SVC_TAB_SIZE - 1) |
| 254 | |
| 255 | /* the service table hashed by <protocol, addr, port> */ |
| 256 | static struct list_head ip_vs_svc_table[IP_VS_SVC_TAB_SIZE]; |
| 257 | /* the service table hashed by fwmark */ |
| 258 | static struct list_head ip_vs_svc_fwm_table[IP_VS_SVC_TAB_SIZE]; |
| 259 | |
| 260 | /* |
| 261 | * Hash table: for real service lookups |
| 262 | */ |
| 263 | #define IP_VS_RTAB_BITS 4 |
| 264 | #define IP_VS_RTAB_SIZE (1 << IP_VS_RTAB_BITS) |
| 265 | #define IP_VS_RTAB_MASK (IP_VS_RTAB_SIZE - 1) |
| 266 | |
| 267 | static struct list_head ip_vs_rtable[IP_VS_RTAB_SIZE]; |
| 268 | |
| 269 | /* |
| 270 | * Trash for destinations |
| 271 | */ |
| 272 | static LIST_HEAD(ip_vs_dest_trash); |
| 273 | |
| 274 | /* |
| 275 | * FTP & NULL virtual service counters |
| 276 | */ |
| 277 | static atomic_t ip_vs_ftpsvc_counter = ATOMIC_INIT(0); |
| 278 | static atomic_t ip_vs_nullsvc_counter = ATOMIC_INIT(0); |
| 279 | |
| 280 | |
| 281 | /* |
| 282 | * Returns hash value for virtual service |
| 283 | */ |
| 284 | static __inline__ unsigned |
Julius Volz | b18610d | 2008-09-02 15:55:37 +0200 | [diff] [blame] | 285 | ip_vs_svc_hashkey(int af, unsigned proto, const union nf_inet_addr *addr, |
| 286 | __be16 port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | { |
| 288 | register unsigned porth = ntohs(port); |
Julius Volz | b18610d | 2008-09-02 15:55:37 +0200 | [diff] [blame] | 289 | __be32 addr_fold = addr->ip; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | |
Julius Volz | b18610d | 2008-09-02 15:55:37 +0200 | [diff] [blame] | 291 | #ifdef CONFIG_IP_VS_IPV6 |
| 292 | if (af == AF_INET6) |
| 293 | addr_fold = addr->ip6[0]^addr->ip6[1]^ |
| 294 | addr->ip6[2]^addr->ip6[3]; |
| 295 | #endif |
| 296 | |
| 297 | return (proto^ntohl(addr_fold)^(porth>>IP_VS_SVC_TAB_BITS)^porth) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | & IP_VS_SVC_TAB_MASK; |
| 299 | } |
| 300 | |
| 301 | /* |
| 302 | * Returns hash value of fwmark for virtual service lookup |
| 303 | */ |
| 304 | static __inline__ unsigned ip_vs_svc_fwm_hashkey(__u32 fwmark) |
| 305 | { |
| 306 | return fwmark & IP_VS_SVC_TAB_MASK; |
| 307 | } |
| 308 | |
| 309 | /* |
| 310 | * Hashes a service in the ip_vs_svc_table by <proto,addr,port> |
| 311 | * or in the ip_vs_svc_fwm_table by fwmark. |
| 312 | * Should be called with locked tables. |
| 313 | */ |
| 314 | static int ip_vs_svc_hash(struct ip_vs_service *svc) |
| 315 | { |
| 316 | unsigned hash; |
| 317 | |
| 318 | if (svc->flags & IP_VS_SVC_F_HASHED) { |
| 319 | IP_VS_ERR("ip_vs_svc_hash(): request for already hashed, " |
| 320 | "called from %p\n", __builtin_return_address(0)); |
| 321 | return 0; |
| 322 | } |
| 323 | |
| 324 | if (svc->fwmark == 0) { |
| 325 | /* |
| 326 | * Hash it by <protocol,addr,port> in ip_vs_svc_table |
| 327 | */ |
Julius Volz | b18610d | 2008-09-02 15:55:37 +0200 | [diff] [blame] | 328 | hash = ip_vs_svc_hashkey(svc->af, svc->protocol, &svc->addr, |
Julius Volz | e7ade46 | 2008-09-02 15:55:33 +0200 | [diff] [blame] | 329 | svc->port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | list_add(&svc->s_list, &ip_vs_svc_table[hash]); |
| 331 | } else { |
| 332 | /* |
| 333 | * Hash it by fwmark in ip_vs_svc_fwm_table |
| 334 | */ |
| 335 | hash = ip_vs_svc_fwm_hashkey(svc->fwmark); |
| 336 | list_add(&svc->f_list, &ip_vs_svc_fwm_table[hash]); |
| 337 | } |
| 338 | |
| 339 | svc->flags |= IP_VS_SVC_F_HASHED; |
| 340 | /* increase its refcnt because it is referenced by the svc table */ |
| 341 | atomic_inc(&svc->refcnt); |
| 342 | return 1; |
| 343 | } |
| 344 | |
| 345 | |
| 346 | /* |
| 347 | * Unhashes a service from ip_vs_svc_table/ip_vs_svc_fwm_table. |
| 348 | * Should be called with locked tables. |
| 349 | */ |
| 350 | static int ip_vs_svc_unhash(struct ip_vs_service *svc) |
| 351 | { |
| 352 | if (!(svc->flags & IP_VS_SVC_F_HASHED)) { |
| 353 | IP_VS_ERR("ip_vs_svc_unhash(): request for unhash flagged, " |
| 354 | "called from %p\n", __builtin_return_address(0)); |
| 355 | return 0; |
| 356 | } |
| 357 | |
| 358 | if (svc->fwmark == 0) { |
| 359 | /* Remove it from the ip_vs_svc_table table */ |
| 360 | list_del(&svc->s_list); |
| 361 | } else { |
| 362 | /* Remove it from the ip_vs_svc_fwm_table table */ |
| 363 | list_del(&svc->f_list); |
| 364 | } |
| 365 | |
| 366 | svc->flags &= ~IP_VS_SVC_F_HASHED; |
| 367 | atomic_dec(&svc->refcnt); |
| 368 | return 1; |
| 369 | } |
| 370 | |
| 371 | |
| 372 | /* |
| 373 | * Get service by {proto,addr,port} in the service table. |
| 374 | */ |
Julius Volz | b18610d | 2008-09-02 15:55:37 +0200 | [diff] [blame] | 375 | static inline struct ip_vs_service * |
| 376 | __ip_vs_service_get(int af, __u16 protocol, const union nf_inet_addr *vaddr, |
| 377 | __be16 vport) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | { |
| 379 | unsigned hash; |
| 380 | struct ip_vs_service *svc; |
| 381 | |
| 382 | /* Check for "full" addressed entries */ |
Julius Volz | b18610d | 2008-09-02 15:55:37 +0200 | [diff] [blame] | 383 | hash = ip_vs_svc_hashkey(af, protocol, vaddr, vport); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | |
| 385 | list_for_each_entry(svc, &ip_vs_svc_table[hash], s_list){ |
Julius Volz | b18610d | 2008-09-02 15:55:37 +0200 | [diff] [blame] | 386 | if ((svc->af == af) |
| 387 | && ip_vs_addr_equal(af, &svc->addr, vaddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | && (svc->port == vport) |
| 389 | && (svc->protocol == protocol)) { |
| 390 | /* HIT */ |
| 391 | atomic_inc(&svc->usecnt); |
| 392 | return svc; |
| 393 | } |
| 394 | } |
| 395 | |
| 396 | return NULL; |
| 397 | } |
| 398 | |
| 399 | |
| 400 | /* |
| 401 | * Get service by {fwmark} in the service table. |
| 402 | */ |
Julius Volz | b18610d | 2008-09-02 15:55:37 +0200 | [diff] [blame] | 403 | static inline struct ip_vs_service * |
| 404 | __ip_vs_svc_fwm_get(int af, __u32 fwmark) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | { |
| 406 | unsigned hash; |
| 407 | struct ip_vs_service *svc; |
| 408 | |
| 409 | /* Check for fwmark addressed entries */ |
| 410 | hash = ip_vs_svc_fwm_hashkey(fwmark); |
| 411 | |
| 412 | list_for_each_entry(svc, &ip_vs_svc_fwm_table[hash], f_list) { |
Julius Volz | b18610d | 2008-09-02 15:55:37 +0200 | [diff] [blame] | 413 | if (svc->fwmark == fwmark && svc->af == af) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | /* HIT */ |
| 415 | atomic_inc(&svc->usecnt); |
| 416 | return svc; |
| 417 | } |
| 418 | } |
| 419 | |
| 420 | return NULL; |
| 421 | } |
| 422 | |
| 423 | struct ip_vs_service * |
Julius Volz | 3c2e050 | 2008-09-02 15:55:38 +0200 | [diff] [blame] | 424 | ip_vs_service_get(int af, __u32 fwmark, __u16 protocol, |
| 425 | const union nf_inet_addr *vaddr, __be16 vport) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | { |
| 427 | struct ip_vs_service *svc; |
Julius Volz | 3c2e050 | 2008-09-02 15:55:38 +0200 | [diff] [blame] | 428 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | read_lock(&__ip_vs_svc_lock); |
| 430 | |
| 431 | /* |
| 432 | * Check the table hashed by fwmark first |
| 433 | */ |
Julius Volz | 3c2e050 | 2008-09-02 15:55:38 +0200 | [diff] [blame] | 434 | if (fwmark && (svc = __ip_vs_svc_fwm_get(af, fwmark))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | goto out; |
| 436 | |
| 437 | /* |
| 438 | * Check the table hashed by <protocol,addr,port> |
| 439 | * for "full" addressed entries |
| 440 | */ |
Julius Volz | 3c2e050 | 2008-09-02 15:55:38 +0200 | [diff] [blame] | 441 | svc = __ip_vs_service_get(af, protocol, vaddr, vport); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | |
| 443 | if (svc == NULL |
| 444 | && protocol == IPPROTO_TCP |
| 445 | && atomic_read(&ip_vs_ftpsvc_counter) |
| 446 | && (vport == FTPDATA || ntohs(vport) >= PROT_SOCK)) { |
| 447 | /* |
| 448 | * Check if ftp service entry exists, the packet |
| 449 | * might belong to FTP data connections. |
| 450 | */ |
Julius Volz | 3c2e050 | 2008-09-02 15:55:38 +0200 | [diff] [blame] | 451 | svc = __ip_vs_service_get(af, protocol, vaddr, FTPPORT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | } |
| 453 | |
| 454 | if (svc == NULL |
| 455 | && atomic_read(&ip_vs_nullsvc_counter)) { |
| 456 | /* |
| 457 | * Check if the catch-all port (port zero) exists |
| 458 | */ |
Julius Volz | 3c2e050 | 2008-09-02 15:55:38 +0200 | [diff] [blame] | 459 | svc = __ip_vs_service_get(af, protocol, vaddr, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | } |
| 461 | |
| 462 | out: |
| 463 | read_unlock(&__ip_vs_svc_lock); |
| 464 | |
Julius Volz | 3c2e050 | 2008-09-02 15:55:38 +0200 | [diff] [blame] | 465 | IP_VS_DBG_BUF(9, "lookup service: fwm %u %s %s:%u %s\n", |
| 466 | fwmark, ip_vs_proto_name(protocol), |
| 467 | IP_VS_DBG_ADDR(af, vaddr), ntohs(vport), |
| 468 | svc ? "hit" : "not hit"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | |
| 470 | return svc; |
| 471 | } |
| 472 | |
| 473 | |
| 474 | static inline void |
| 475 | __ip_vs_bind_svc(struct ip_vs_dest *dest, struct ip_vs_service *svc) |
| 476 | { |
| 477 | atomic_inc(&svc->refcnt); |
| 478 | dest->svc = svc; |
| 479 | } |
| 480 | |
| 481 | static inline void |
| 482 | __ip_vs_unbind_svc(struct ip_vs_dest *dest) |
| 483 | { |
| 484 | struct ip_vs_service *svc = dest->svc; |
| 485 | |
| 486 | dest->svc = NULL; |
| 487 | if (atomic_dec_and_test(&svc->refcnt)) |
| 488 | kfree(svc); |
| 489 | } |
| 490 | |
| 491 | |
| 492 | /* |
| 493 | * Returns hash value for real service |
| 494 | */ |
Julius Volz | 7937df1 | 2008-09-02 15:55:48 +0200 | [diff] [blame] | 495 | static inline unsigned ip_vs_rs_hashkey(int af, |
| 496 | const union nf_inet_addr *addr, |
| 497 | __be16 port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | { |
| 499 | register unsigned porth = ntohs(port); |
Julius Volz | 7937df1 | 2008-09-02 15:55:48 +0200 | [diff] [blame] | 500 | __be32 addr_fold = addr->ip; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | |
Julius Volz | 7937df1 | 2008-09-02 15:55:48 +0200 | [diff] [blame] | 502 | #ifdef CONFIG_IP_VS_IPV6 |
| 503 | if (af == AF_INET6) |
| 504 | addr_fold = addr->ip6[0]^addr->ip6[1]^ |
| 505 | addr->ip6[2]^addr->ip6[3]; |
| 506 | #endif |
| 507 | |
| 508 | return (ntohl(addr_fold)^(porth>>IP_VS_RTAB_BITS)^porth) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | & IP_VS_RTAB_MASK; |
| 510 | } |
| 511 | |
| 512 | /* |
| 513 | * Hashes ip_vs_dest in ip_vs_rtable by <proto,addr,port>. |
| 514 | * should be called with locked tables. |
| 515 | */ |
| 516 | static int ip_vs_rs_hash(struct ip_vs_dest *dest) |
| 517 | { |
| 518 | unsigned hash; |
| 519 | |
| 520 | if (!list_empty(&dest->d_list)) { |
| 521 | return 0; |
| 522 | } |
| 523 | |
| 524 | /* |
| 525 | * Hash by proto,addr,port, |
| 526 | * which are the parameters of the real service. |
| 527 | */ |
Julius Volz | 7937df1 | 2008-09-02 15:55:48 +0200 | [diff] [blame] | 528 | hash = ip_vs_rs_hashkey(dest->af, &dest->addr, dest->port); |
| 529 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | list_add(&dest->d_list, &ip_vs_rtable[hash]); |
| 531 | |
| 532 | return 1; |
| 533 | } |
| 534 | |
| 535 | /* |
| 536 | * UNhashes ip_vs_dest from ip_vs_rtable. |
| 537 | * should be called with locked tables. |
| 538 | */ |
| 539 | static int ip_vs_rs_unhash(struct ip_vs_dest *dest) |
| 540 | { |
| 541 | /* |
| 542 | * Remove it from the ip_vs_rtable table. |
| 543 | */ |
| 544 | if (!list_empty(&dest->d_list)) { |
| 545 | list_del(&dest->d_list); |
| 546 | INIT_LIST_HEAD(&dest->d_list); |
| 547 | } |
| 548 | |
| 549 | return 1; |
| 550 | } |
| 551 | |
| 552 | /* |
| 553 | * Lookup real service by <proto,addr,port> in the real service table. |
| 554 | */ |
| 555 | struct ip_vs_dest * |
Julius Volz | 7937df1 | 2008-09-02 15:55:48 +0200 | [diff] [blame] | 556 | ip_vs_lookup_real_service(int af, __u16 protocol, |
| 557 | const union nf_inet_addr *daddr, |
| 558 | __be16 dport) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | { |
| 560 | unsigned hash; |
| 561 | struct ip_vs_dest *dest; |
| 562 | |
| 563 | /* |
| 564 | * Check for "full" addressed entries |
| 565 | * Return the first found entry |
| 566 | */ |
Julius Volz | 7937df1 | 2008-09-02 15:55:48 +0200 | [diff] [blame] | 567 | hash = ip_vs_rs_hashkey(af, daddr, dport); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | |
| 569 | read_lock(&__ip_vs_rs_lock); |
| 570 | list_for_each_entry(dest, &ip_vs_rtable[hash], d_list) { |
Julius Volz | 7937df1 | 2008-09-02 15:55:48 +0200 | [diff] [blame] | 571 | if ((dest->af == af) |
| 572 | && ip_vs_addr_equal(af, &dest->addr, daddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | && (dest->port == dport) |
| 574 | && ((dest->protocol == protocol) || |
| 575 | dest->vfwmark)) { |
| 576 | /* HIT */ |
| 577 | read_unlock(&__ip_vs_rs_lock); |
| 578 | return dest; |
| 579 | } |
| 580 | } |
| 581 | read_unlock(&__ip_vs_rs_lock); |
| 582 | |
| 583 | return NULL; |
| 584 | } |
| 585 | |
| 586 | /* |
| 587 | * Lookup destination by {addr,port} in the given service |
| 588 | */ |
| 589 | static struct ip_vs_dest * |
Julius Volz | 7937df1 | 2008-09-02 15:55:48 +0200 | [diff] [blame] | 590 | ip_vs_lookup_dest(struct ip_vs_service *svc, const union nf_inet_addr *daddr, |
| 591 | __be16 dport) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | { |
| 593 | struct ip_vs_dest *dest; |
| 594 | |
| 595 | /* |
| 596 | * Find the destination for the given service |
| 597 | */ |
| 598 | list_for_each_entry(dest, &svc->destinations, n_list) { |
Julius Volz | 7937df1 | 2008-09-02 15:55:48 +0200 | [diff] [blame] | 599 | if ((dest->af == svc->af) |
| 600 | && ip_vs_addr_equal(svc->af, &dest->addr, daddr) |
| 601 | && (dest->port == dport)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | /* HIT */ |
| 603 | return dest; |
| 604 | } |
| 605 | } |
| 606 | |
| 607 | return NULL; |
| 608 | } |
| 609 | |
Rumen G. Bogdanovski | 1e356f9 | 2007-11-07 02:35:54 -0800 | [diff] [blame] | 610 | /* |
| 611 | * Find destination by {daddr,dport,vaddr,protocol} |
| 612 | * Cretaed to be used in ip_vs_process_message() in |
| 613 | * the backup synchronization daemon. It finds the |
| 614 | * destination to be bound to the received connection |
| 615 | * on the backup. |
| 616 | * |
| 617 | * ip_vs_lookup_real_service() looked promissing, but |
| 618 | * seems not working as expected. |
| 619 | */ |
Julius Volz | 7937df1 | 2008-09-02 15:55:48 +0200 | [diff] [blame] | 620 | struct ip_vs_dest *ip_vs_find_dest(int af, const union nf_inet_addr *daddr, |
| 621 | __be16 dport, |
| 622 | const union nf_inet_addr *vaddr, |
| 623 | __be16 vport, __u16 protocol) |
Rumen G. Bogdanovski | 1e356f9 | 2007-11-07 02:35:54 -0800 | [diff] [blame] | 624 | { |
| 625 | struct ip_vs_dest *dest; |
| 626 | struct ip_vs_service *svc; |
| 627 | |
Julius Volz | 7937df1 | 2008-09-02 15:55:48 +0200 | [diff] [blame] | 628 | svc = ip_vs_service_get(af, 0, protocol, vaddr, vport); |
Rumen G. Bogdanovski | 1e356f9 | 2007-11-07 02:35:54 -0800 | [diff] [blame] | 629 | if (!svc) |
| 630 | return NULL; |
| 631 | dest = ip_vs_lookup_dest(svc, daddr, dport); |
| 632 | if (dest) |
| 633 | atomic_inc(&dest->refcnt); |
| 634 | ip_vs_service_put(svc); |
| 635 | return dest; |
| 636 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 637 | |
| 638 | /* |
| 639 | * Lookup dest by {svc,addr,port} in the destination trash. |
| 640 | * The destination trash is used to hold the destinations that are removed |
| 641 | * from the service table but are still referenced by some conn entries. |
| 642 | * The reason to add the destination trash is when the dest is temporary |
| 643 | * down (either by administrator or by monitor program), the dest can be |
| 644 | * picked back from the trash, the remaining connections to the dest can |
| 645 | * continue, and the counting information of the dest is also useful for |
| 646 | * scheduling. |
| 647 | */ |
| 648 | static struct ip_vs_dest * |
Julius Volz | 7937df1 | 2008-09-02 15:55:48 +0200 | [diff] [blame] | 649 | ip_vs_trash_get_dest(struct ip_vs_service *svc, const union nf_inet_addr *daddr, |
| 650 | __be16 dport) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | { |
| 652 | struct ip_vs_dest *dest, *nxt; |
| 653 | |
| 654 | /* |
| 655 | * Find the destination in trash |
| 656 | */ |
| 657 | list_for_each_entry_safe(dest, nxt, &ip_vs_dest_trash, n_list) { |
Julius Volz | 7937df1 | 2008-09-02 15:55:48 +0200 | [diff] [blame] | 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) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | dest->port == dport && |
| 667 | dest->vfwmark == svc->fwmark && |
| 668 | dest->protocol == svc->protocol && |
| 669 | (svc->fwmark || |
Julius Volz | 7937df1 | 2008-09-02 15:55:48 +0200 | [diff] [blame] | 670 | (ip_vs_addr_equal(svc->af, &dest->vaddr, &svc->addr) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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) { |
Julius Volz | 7937df1 | 2008-09-02 15:55:48 +0200 | [diff] [blame] | 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)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | list_del(&dest->n_list); |
| 686 | ip_vs_dst_reset(dest); |
| 687 | __ip_vs_unbind_svc(dest); |
| 688 | kfree(dest); |
| 689 | } |
| 690 | } |
| 691 | |
| 692 | return NULL; |
| 693 | } |
| 694 | |
| 695 | |
| 696 | /* |
| 697 | * Clean up all the destinations in the trash |
| 698 | * Called by the ip_vs_control_cleanup() |
| 699 | * |
| 700 | * When the ip_vs_control_clearup is activated by ipvs module exit, |
| 701 | * the service tables must have been flushed and all the connections |
| 702 | * are expired, and the refcnt of each destination in the trash must |
| 703 | * be 1, so we simply release them here. |
| 704 | */ |
| 705 | static void ip_vs_trash_cleanup(void) |
| 706 | { |
| 707 | struct ip_vs_dest *dest, *nxt; |
| 708 | |
| 709 | list_for_each_entry_safe(dest, nxt, &ip_vs_dest_trash, n_list) { |
| 710 | list_del(&dest->n_list); |
| 711 | ip_vs_dst_reset(dest); |
| 712 | __ip_vs_unbind_svc(dest); |
| 713 | kfree(dest); |
| 714 | } |
| 715 | } |
| 716 | |
| 717 | |
| 718 | static void |
| 719 | ip_vs_zero_stats(struct ip_vs_stats *stats) |
| 720 | { |
| 721 | spin_lock_bh(&stats->lock); |
Simon Horman | e93615d | 2008-08-11 17:19:14 +1000 | [diff] [blame] | 722 | |
| 723 | stats->conns = 0; |
| 724 | stats->inpkts = 0; |
| 725 | stats->outpkts = 0; |
| 726 | stats->inbytes = 0; |
| 727 | stats->outbytes = 0; |
| 728 | |
| 729 | stats->cps = 0; |
| 730 | stats->inpps = 0; |
| 731 | stats->outpps = 0; |
| 732 | stats->inbps = 0; |
| 733 | stats->outbps = 0; |
| 734 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 735 | ip_vs_zero_estimator(stats); |
Simon Horman | e93615d | 2008-08-11 17:19:14 +1000 | [diff] [blame] | 736 | |
Sven Wegener | 3a14a31 | 2008-08-10 18:24:41 +0000 | [diff] [blame] | 737 | spin_unlock_bh(&stats->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | } |
| 739 | |
| 740 | /* |
| 741 | * Update a destination in the given service |
| 742 | */ |
| 743 | static void |
| 744 | __ip_vs_update_dest(struct ip_vs_service *svc, |
Julius Volz | c860c6b | 2008-09-02 15:55:36 +0200 | [diff] [blame] | 745 | struct ip_vs_dest *dest, struct ip_vs_dest_user_kern *udest) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | { |
| 747 | int conn_flags; |
| 748 | |
| 749 | /* set the weight and the flags */ |
| 750 | atomic_set(&dest->weight, udest->weight); |
| 751 | conn_flags = udest->conn_flags | IP_VS_CONN_F_INACTIVE; |
| 752 | |
| 753 | /* check if local node and update the flags */ |
Julius Volz | c860c6b | 2008-09-02 15:55:36 +0200 | [diff] [blame] | 754 | if (inet_addr_type(&init_net, udest->addr.ip) == RTN_LOCAL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 755 | conn_flags = (conn_flags & ~IP_VS_CONN_F_FWD_MASK) |
| 756 | | IP_VS_CONN_F_LOCALNODE; |
| 757 | } |
| 758 | |
| 759 | /* set the IP_VS_CONN_F_NOOUTPUT flag if not masquerading/NAT */ |
| 760 | if ((conn_flags & IP_VS_CONN_F_FWD_MASK) != 0) { |
| 761 | conn_flags |= IP_VS_CONN_F_NOOUTPUT; |
| 762 | } else { |
| 763 | /* |
| 764 | * Put the real service in ip_vs_rtable if not present. |
| 765 | * For now only for NAT! |
| 766 | */ |
| 767 | write_lock_bh(&__ip_vs_rs_lock); |
| 768 | ip_vs_rs_hash(dest); |
| 769 | write_unlock_bh(&__ip_vs_rs_lock); |
| 770 | } |
| 771 | atomic_set(&dest->conn_flags, conn_flags); |
| 772 | |
| 773 | /* bind the service */ |
| 774 | if (!dest->svc) { |
| 775 | __ip_vs_bind_svc(dest, svc); |
| 776 | } else { |
| 777 | if (dest->svc != svc) { |
| 778 | __ip_vs_unbind_svc(dest); |
| 779 | ip_vs_zero_stats(&dest->stats); |
| 780 | __ip_vs_bind_svc(dest, svc); |
| 781 | } |
| 782 | } |
| 783 | |
| 784 | /* set the dest status flags */ |
| 785 | dest->flags |= IP_VS_DEST_F_AVAILABLE; |
| 786 | |
| 787 | if (udest->u_threshold == 0 || udest->u_threshold > dest->u_threshold) |
| 788 | dest->flags &= ~IP_VS_DEST_F_OVERLOAD; |
| 789 | dest->u_threshold = udest->u_threshold; |
| 790 | dest->l_threshold = udest->l_threshold; |
| 791 | } |
| 792 | |
| 793 | |
| 794 | /* |
| 795 | * Create a destination for the given service |
| 796 | */ |
| 797 | static int |
Julius Volz | c860c6b | 2008-09-02 15:55:36 +0200 | [diff] [blame] | 798 | ip_vs_new_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 799 | struct ip_vs_dest **dest_p) |
| 800 | { |
| 801 | struct ip_vs_dest *dest; |
| 802 | unsigned atype; |
| 803 | |
| 804 | EnterFunction(2); |
| 805 | |
Julius Volz | c860c6b | 2008-09-02 15:55:36 +0200 | [diff] [blame] | 806 | atype = inet_addr_type(&init_net, udest->addr.ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | if (atype != RTN_LOCAL && atype != RTN_UNICAST) |
| 808 | return -EINVAL; |
| 809 | |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 810 | dest = kzalloc(sizeof(struct ip_vs_dest), GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | if (dest == NULL) { |
| 812 | IP_VS_ERR("ip_vs_new_dest: kmalloc failed.\n"); |
| 813 | return -ENOMEM; |
| 814 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 815 | |
Julius Volz | c860c6b | 2008-09-02 15:55:36 +0200 | [diff] [blame] | 816 | dest->af = svc->af; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 817 | dest->protocol = svc->protocol; |
Julius Volz | c860c6b | 2008-09-02 15:55:36 +0200 | [diff] [blame] | 818 | dest->vaddr = svc->addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | dest->vport = svc->port; |
| 820 | dest->vfwmark = svc->fwmark; |
Julius Volz | c860c6b | 2008-09-02 15:55:36 +0200 | [diff] [blame] | 821 | ip_vs_addr_copy(svc->af, &dest->addr, &udest->addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | dest->port = udest->port; |
| 823 | |
| 824 | atomic_set(&dest->activeconns, 0); |
| 825 | atomic_set(&dest->inactconns, 0); |
| 826 | atomic_set(&dest->persistconns, 0); |
| 827 | atomic_set(&dest->refcnt, 0); |
| 828 | |
| 829 | INIT_LIST_HEAD(&dest->d_list); |
| 830 | spin_lock_init(&dest->dst_lock); |
| 831 | spin_lock_init(&dest->stats.lock); |
| 832 | __ip_vs_update_dest(svc, dest, udest); |
| 833 | ip_vs_new_estimator(&dest->stats); |
| 834 | |
| 835 | *dest_p = dest; |
| 836 | |
| 837 | LeaveFunction(2); |
| 838 | return 0; |
| 839 | } |
| 840 | |
| 841 | |
| 842 | /* |
| 843 | * Add a destination into an existing service |
| 844 | */ |
| 845 | static int |
Julius Volz | c860c6b | 2008-09-02 15:55:36 +0200 | [diff] [blame] | 846 | ip_vs_add_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 847 | { |
| 848 | struct ip_vs_dest *dest; |
Julius Volz | c860c6b | 2008-09-02 15:55:36 +0200 | [diff] [blame] | 849 | union nf_inet_addr daddr; |
Al Viro | 014d730 | 2006-09-28 14:29:52 -0700 | [diff] [blame] | 850 | __be16 dport = udest->port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 851 | int ret; |
| 852 | |
| 853 | EnterFunction(2); |
| 854 | |
| 855 | if (udest->weight < 0) { |
| 856 | IP_VS_ERR("ip_vs_add_dest(): server weight less than zero\n"); |
| 857 | return -ERANGE; |
| 858 | } |
| 859 | |
| 860 | if (udest->l_threshold > udest->u_threshold) { |
| 861 | IP_VS_ERR("ip_vs_add_dest(): lower threshold is higher than " |
| 862 | "upper threshold\n"); |
| 863 | return -ERANGE; |
| 864 | } |
| 865 | |
Julius Volz | c860c6b | 2008-09-02 15:55:36 +0200 | [diff] [blame] | 866 | ip_vs_addr_copy(svc->af, &daddr, &udest->addr); |
| 867 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | /* |
| 869 | * Check if the dest already exists in the list |
| 870 | */ |
Julius Volz | 7937df1 | 2008-09-02 15:55:48 +0200 | [diff] [blame] | 871 | dest = ip_vs_lookup_dest(svc, &daddr, dport); |
| 872 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 873 | if (dest != NULL) { |
| 874 | IP_VS_DBG(1, "ip_vs_add_dest(): dest already exists\n"); |
| 875 | return -EEXIST; |
| 876 | } |
| 877 | |
| 878 | /* |
| 879 | * Check if the dest already exists in the trash and |
| 880 | * is from the same service |
| 881 | */ |
Julius Volz | 7937df1 | 2008-09-02 15:55:48 +0200 | [diff] [blame] | 882 | dest = ip_vs_trash_get_dest(svc, &daddr, dport); |
| 883 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 884 | if (dest != NULL) { |
| 885 | IP_VS_DBG(3, "Get destination %u.%u.%u.%u:%u from trash, " |
Roberto Nibali | 4b5bdf5 | 2006-01-03 14:22:59 -0800 | [diff] [blame] | 886 | "dest->refcnt=%d, service %u/%u.%u.%u.%u:%u\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 887 | NIPQUAD(daddr), ntohs(dport), |
| 888 | atomic_read(&dest->refcnt), |
| 889 | dest->vfwmark, |
Julius Volz | e7ade46 | 2008-09-02 15:55:33 +0200 | [diff] [blame] | 890 | NIPQUAD(dest->vaddr.ip), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | ntohs(dest->vport)); |
| 892 | __ip_vs_update_dest(svc, dest, udest); |
| 893 | |
| 894 | /* |
| 895 | * Get the destination from the trash |
| 896 | */ |
| 897 | list_del(&dest->n_list); |
| 898 | |
| 899 | ip_vs_new_estimator(&dest->stats); |
| 900 | |
| 901 | write_lock_bh(&__ip_vs_svc_lock); |
| 902 | |
| 903 | /* |
| 904 | * Wait until all other svc users go away. |
| 905 | */ |
| 906 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1); |
| 907 | |
| 908 | list_add(&dest->n_list, &svc->destinations); |
| 909 | svc->num_dests++; |
| 910 | |
| 911 | /* call the update_service function of its scheduler */ |
Sven Wegener | 82dfb6f | 2008-08-11 19:36:06 +0000 | [diff] [blame] | 912 | if (svc->scheduler->update_service) |
| 913 | svc->scheduler->update_service(svc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | |
| 915 | write_unlock_bh(&__ip_vs_svc_lock); |
| 916 | return 0; |
| 917 | } |
| 918 | |
| 919 | /* |
| 920 | * Allocate and initialize the dest structure |
| 921 | */ |
| 922 | ret = ip_vs_new_dest(svc, udest, &dest); |
| 923 | if (ret) { |
| 924 | return ret; |
| 925 | } |
| 926 | |
| 927 | /* |
| 928 | * Add the dest entry into the list |
| 929 | */ |
| 930 | atomic_inc(&dest->refcnt); |
| 931 | |
| 932 | write_lock_bh(&__ip_vs_svc_lock); |
| 933 | |
| 934 | /* |
| 935 | * Wait until all other svc users go away. |
| 936 | */ |
| 937 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1); |
| 938 | |
| 939 | list_add(&dest->n_list, &svc->destinations); |
| 940 | svc->num_dests++; |
| 941 | |
| 942 | /* call the update_service function of its scheduler */ |
Sven Wegener | 82dfb6f | 2008-08-11 19:36:06 +0000 | [diff] [blame] | 943 | if (svc->scheduler->update_service) |
| 944 | svc->scheduler->update_service(svc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | |
| 946 | write_unlock_bh(&__ip_vs_svc_lock); |
| 947 | |
| 948 | LeaveFunction(2); |
| 949 | |
| 950 | return 0; |
| 951 | } |
| 952 | |
| 953 | |
| 954 | /* |
| 955 | * Edit a destination in the given service |
| 956 | */ |
| 957 | static int |
Julius Volz | c860c6b | 2008-09-02 15:55:36 +0200 | [diff] [blame] | 958 | ip_vs_edit_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 959 | { |
| 960 | struct ip_vs_dest *dest; |
Julius Volz | c860c6b | 2008-09-02 15:55:36 +0200 | [diff] [blame] | 961 | union nf_inet_addr daddr; |
Al Viro | 014d730 | 2006-09-28 14:29:52 -0700 | [diff] [blame] | 962 | __be16 dport = udest->port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 963 | |
| 964 | EnterFunction(2); |
| 965 | |
| 966 | if (udest->weight < 0) { |
| 967 | IP_VS_ERR("ip_vs_edit_dest(): server weight less than zero\n"); |
| 968 | return -ERANGE; |
| 969 | } |
| 970 | |
| 971 | if (udest->l_threshold > udest->u_threshold) { |
| 972 | IP_VS_ERR("ip_vs_edit_dest(): lower threshold is higher than " |
| 973 | "upper threshold\n"); |
| 974 | return -ERANGE; |
| 975 | } |
| 976 | |
Julius Volz | c860c6b | 2008-09-02 15:55:36 +0200 | [diff] [blame] | 977 | ip_vs_addr_copy(svc->af, &daddr, &udest->addr); |
| 978 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 979 | /* |
| 980 | * Lookup the destination list |
| 981 | */ |
Julius Volz | 7937df1 | 2008-09-02 15:55:48 +0200 | [diff] [blame] | 982 | dest = ip_vs_lookup_dest(svc, &daddr, dport); |
| 983 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 984 | if (dest == NULL) { |
| 985 | IP_VS_DBG(1, "ip_vs_edit_dest(): dest doesn't exist\n"); |
| 986 | return -ENOENT; |
| 987 | } |
| 988 | |
| 989 | __ip_vs_update_dest(svc, dest, udest); |
| 990 | |
| 991 | write_lock_bh(&__ip_vs_svc_lock); |
| 992 | |
| 993 | /* Wait until all other svc users go away */ |
Heiko Carstens | cae7ca3 | 2007-08-10 15:50:30 -0700 | [diff] [blame] | 994 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 995 | |
| 996 | /* call the update_service, because server weight may be changed */ |
Sven Wegener | 82dfb6f | 2008-08-11 19:36:06 +0000 | [diff] [blame] | 997 | if (svc->scheduler->update_service) |
| 998 | svc->scheduler->update_service(svc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 999 | |
| 1000 | write_unlock_bh(&__ip_vs_svc_lock); |
| 1001 | |
| 1002 | LeaveFunction(2); |
| 1003 | |
| 1004 | return 0; |
| 1005 | } |
| 1006 | |
| 1007 | |
| 1008 | /* |
| 1009 | * Delete a destination (must be already unlinked from the service) |
| 1010 | */ |
| 1011 | static void __ip_vs_del_dest(struct ip_vs_dest *dest) |
| 1012 | { |
| 1013 | ip_vs_kill_estimator(&dest->stats); |
| 1014 | |
| 1015 | /* |
| 1016 | * Remove it from the d-linked list with the real services. |
| 1017 | */ |
| 1018 | write_lock_bh(&__ip_vs_rs_lock); |
| 1019 | ip_vs_rs_unhash(dest); |
| 1020 | write_unlock_bh(&__ip_vs_rs_lock); |
| 1021 | |
| 1022 | /* |
| 1023 | * Decrease the refcnt of the dest, and free the dest |
| 1024 | * if nobody refers to it (refcnt=0). Otherwise, throw |
| 1025 | * the destination into the trash. |
| 1026 | */ |
| 1027 | if (atomic_dec_and_test(&dest->refcnt)) { |
| 1028 | ip_vs_dst_reset(dest); |
| 1029 | /* simply decrease svc->refcnt here, let the caller check |
| 1030 | and release the service if nobody refers to it. |
| 1031 | Only user context can release destination and service, |
| 1032 | and only one user context can update virtual service at a |
| 1033 | time, so the operation here is OK */ |
| 1034 | atomic_dec(&dest->svc->refcnt); |
| 1035 | kfree(dest); |
| 1036 | } else { |
Roberto Nibali | 4b5bdf5 | 2006-01-03 14:22:59 -0800 | [diff] [blame] | 1037 | IP_VS_DBG(3, "Moving dest %u.%u.%u.%u:%u into trash, " |
| 1038 | "dest->refcnt=%d\n", |
Julius Volz | e7ade46 | 2008-09-02 15:55:33 +0200 | [diff] [blame] | 1039 | NIPQUAD(dest->addr.ip), ntohs(dest->port), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1040 | atomic_read(&dest->refcnt)); |
| 1041 | list_add(&dest->n_list, &ip_vs_dest_trash); |
| 1042 | atomic_inc(&dest->refcnt); |
| 1043 | } |
| 1044 | } |
| 1045 | |
| 1046 | |
| 1047 | /* |
| 1048 | * Unlink a destination from the given service |
| 1049 | */ |
| 1050 | static void __ip_vs_unlink_dest(struct ip_vs_service *svc, |
| 1051 | struct ip_vs_dest *dest, |
| 1052 | int svcupd) |
| 1053 | { |
| 1054 | dest->flags &= ~IP_VS_DEST_F_AVAILABLE; |
| 1055 | |
| 1056 | /* |
| 1057 | * Remove it from the d-linked destination list. |
| 1058 | */ |
| 1059 | list_del(&dest->n_list); |
| 1060 | svc->num_dests--; |
Sven Wegener | 82dfb6f | 2008-08-11 19:36:06 +0000 | [diff] [blame] | 1061 | |
| 1062 | /* |
| 1063 | * Call the update_service function of its scheduler |
| 1064 | */ |
| 1065 | if (svcupd && svc->scheduler->update_service) |
| 1066 | svc->scheduler->update_service(svc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | } |
| 1068 | |
| 1069 | |
| 1070 | /* |
| 1071 | * Delete a destination server in the given service |
| 1072 | */ |
| 1073 | static int |
Julius Volz | c860c6b | 2008-09-02 15:55:36 +0200 | [diff] [blame] | 1074 | ip_vs_del_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1075 | { |
| 1076 | struct ip_vs_dest *dest; |
Al Viro | 014d730 | 2006-09-28 14:29:52 -0700 | [diff] [blame] | 1077 | __be16 dport = udest->port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1078 | |
| 1079 | EnterFunction(2); |
| 1080 | |
Julius Volz | 7937df1 | 2008-09-02 15:55:48 +0200 | [diff] [blame] | 1081 | dest = ip_vs_lookup_dest(svc, &udest->addr, dport); |
Julius Volz | c860c6b | 2008-09-02 15:55:36 +0200 | [diff] [blame] | 1082 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1083 | if (dest == NULL) { |
| 1084 | IP_VS_DBG(1, "ip_vs_del_dest(): destination not found!\n"); |
| 1085 | return -ENOENT; |
| 1086 | } |
| 1087 | |
| 1088 | write_lock_bh(&__ip_vs_svc_lock); |
| 1089 | |
| 1090 | /* |
| 1091 | * Wait until all other svc users go away. |
| 1092 | */ |
| 1093 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1); |
| 1094 | |
| 1095 | /* |
| 1096 | * Unlink dest from the service |
| 1097 | */ |
| 1098 | __ip_vs_unlink_dest(svc, dest, 1); |
| 1099 | |
| 1100 | write_unlock_bh(&__ip_vs_svc_lock); |
| 1101 | |
| 1102 | /* |
| 1103 | * Delete the destination |
| 1104 | */ |
| 1105 | __ip_vs_del_dest(dest); |
| 1106 | |
| 1107 | LeaveFunction(2); |
| 1108 | |
| 1109 | return 0; |
| 1110 | } |
| 1111 | |
| 1112 | |
| 1113 | /* |
| 1114 | * Add a service into the service hash table |
| 1115 | */ |
| 1116 | static int |
Julius Volz | c860c6b | 2008-09-02 15:55:36 +0200 | [diff] [blame] | 1117 | ip_vs_add_service(struct ip_vs_service_user_kern *u, |
| 1118 | struct ip_vs_service **svc_p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1119 | { |
| 1120 | int ret = 0; |
| 1121 | struct ip_vs_scheduler *sched = NULL; |
| 1122 | struct ip_vs_service *svc = NULL; |
| 1123 | |
| 1124 | /* increase the module use count */ |
| 1125 | ip_vs_use_count_inc(); |
| 1126 | |
| 1127 | /* Lookup the scheduler by 'u->sched_name' */ |
| 1128 | sched = ip_vs_scheduler_get(u->sched_name); |
| 1129 | if (sched == NULL) { |
| 1130 | IP_VS_INFO("Scheduler module ip_vs_%s not found\n", |
| 1131 | u->sched_name); |
| 1132 | ret = -ENOENT; |
| 1133 | goto out_mod_dec; |
| 1134 | } |
| 1135 | |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 1136 | svc = kzalloc(sizeof(struct ip_vs_service), GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1137 | if (svc == NULL) { |
| 1138 | IP_VS_DBG(1, "ip_vs_add_service: kmalloc failed.\n"); |
| 1139 | ret = -ENOMEM; |
| 1140 | goto out_err; |
| 1141 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1142 | |
| 1143 | /* I'm the first user of the service */ |
| 1144 | atomic_set(&svc->usecnt, 1); |
| 1145 | atomic_set(&svc->refcnt, 0); |
| 1146 | |
Julius Volz | c860c6b | 2008-09-02 15:55:36 +0200 | [diff] [blame] | 1147 | svc->af = u->af; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | svc->protocol = u->protocol; |
Julius Volz | c860c6b | 2008-09-02 15:55:36 +0200 | [diff] [blame] | 1149 | ip_vs_addr_copy(svc->af, &svc->addr, &u->addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1150 | svc->port = u->port; |
| 1151 | svc->fwmark = u->fwmark; |
| 1152 | svc->flags = u->flags; |
| 1153 | svc->timeout = u->timeout * HZ; |
| 1154 | svc->netmask = u->netmask; |
| 1155 | |
| 1156 | INIT_LIST_HEAD(&svc->destinations); |
| 1157 | rwlock_init(&svc->sched_lock); |
| 1158 | spin_lock_init(&svc->stats.lock); |
| 1159 | |
| 1160 | /* Bind the scheduler */ |
| 1161 | ret = ip_vs_bind_scheduler(svc, sched); |
| 1162 | if (ret) |
| 1163 | goto out_err; |
| 1164 | sched = NULL; |
| 1165 | |
| 1166 | /* Update the virtual service counters */ |
| 1167 | if (svc->port == FTPPORT) |
| 1168 | atomic_inc(&ip_vs_ftpsvc_counter); |
| 1169 | else if (svc->port == 0) |
| 1170 | atomic_inc(&ip_vs_nullsvc_counter); |
| 1171 | |
| 1172 | ip_vs_new_estimator(&svc->stats); |
| 1173 | ip_vs_num_services++; |
| 1174 | |
| 1175 | /* Hash the service into the service table */ |
| 1176 | write_lock_bh(&__ip_vs_svc_lock); |
| 1177 | ip_vs_svc_hash(svc); |
| 1178 | write_unlock_bh(&__ip_vs_svc_lock); |
| 1179 | |
| 1180 | *svc_p = svc; |
| 1181 | return 0; |
| 1182 | |
| 1183 | out_err: |
| 1184 | if (svc != NULL) { |
| 1185 | if (svc->scheduler) |
| 1186 | ip_vs_unbind_scheduler(svc); |
| 1187 | if (svc->inc) { |
| 1188 | local_bh_disable(); |
| 1189 | ip_vs_app_inc_put(svc->inc); |
| 1190 | local_bh_enable(); |
| 1191 | } |
| 1192 | kfree(svc); |
| 1193 | } |
| 1194 | ip_vs_scheduler_put(sched); |
| 1195 | |
| 1196 | out_mod_dec: |
| 1197 | /* decrease the module use count */ |
| 1198 | ip_vs_use_count_dec(); |
| 1199 | |
| 1200 | return ret; |
| 1201 | } |
| 1202 | |
| 1203 | |
| 1204 | /* |
| 1205 | * Edit a service and bind it with a new scheduler |
| 1206 | */ |
| 1207 | static int |
Julius Volz | c860c6b | 2008-09-02 15:55:36 +0200 | [diff] [blame] | 1208 | ip_vs_edit_service(struct ip_vs_service *svc, struct ip_vs_service_user_kern *u) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1209 | { |
| 1210 | struct ip_vs_scheduler *sched, *old_sched; |
| 1211 | int ret = 0; |
| 1212 | |
| 1213 | /* |
| 1214 | * Lookup the scheduler, by 'u->sched_name' |
| 1215 | */ |
| 1216 | sched = ip_vs_scheduler_get(u->sched_name); |
| 1217 | if (sched == NULL) { |
| 1218 | IP_VS_INFO("Scheduler module ip_vs_%s not found\n", |
| 1219 | u->sched_name); |
| 1220 | return -ENOENT; |
| 1221 | } |
| 1222 | old_sched = sched; |
| 1223 | |
| 1224 | write_lock_bh(&__ip_vs_svc_lock); |
| 1225 | |
| 1226 | /* |
| 1227 | * Wait until all other svc users go away. |
| 1228 | */ |
| 1229 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1); |
| 1230 | |
| 1231 | /* |
| 1232 | * Set the flags and timeout value |
| 1233 | */ |
| 1234 | svc->flags = u->flags | IP_VS_SVC_F_HASHED; |
| 1235 | svc->timeout = u->timeout * HZ; |
| 1236 | svc->netmask = u->netmask; |
| 1237 | |
| 1238 | old_sched = svc->scheduler; |
| 1239 | if (sched != old_sched) { |
| 1240 | /* |
| 1241 | * Unbind the old scheduler |
| 1242 | */ |
| 1243 | if ((ret = ip_vs_unbind_scheduler(svc))) { |
| 1244 | old_sched = sched; |
| 1245 | goto out; |
| 1246 | } |
| 1247 | |
| 1248 | /* |
| 1249 | * Bind the new scheduler |
| 1250 | */ |
| 1251 | if ((ret = ip_vs_bind_scheduler(svc, sched))) { |
| 1252 | /* |
| 1253 | * If ip_vs_bind_scheduler fails, restore the old |
| 1254 | * scheduler. |
| 1255 | * The main reason of failure is out of memory. |
| 1256 | * |
| 1257 | * The question is if the old scheduler can be |
| 1258 | * restored all the time. TODO: if it cannot be |
| 1259 | * restored some time, we must delete the service, |
| 1260 | * otherwise the system may crash. |
| 1261 | */ |
| 1262 | ip_vs_bind_scheduler(svc, old_sched); |
| 1263 | old_sched = sched; |
| 1264 | goto out; |
| 1265 | } |
| 1266 | } |
| 1267 | |
| 1268 | out: |
| 1269 | write_unlock_bh(&__ip_vs_svc_lock); |
| 1270 | |
| 1271 | if (old_sched) |
| 1272 | ip_vs_scheduler_put(old_sched); |
| 1273 | |
| 1274 | return ret; |
| 1275 | } |
| 1276 | |
| 1277 | |
| 1278 | /* |
| 1279 | * Delete a service from the service list |
| 1280 | * - The service must be unlinked, unlocked and not referenced! |
| 1281 | * - We are called under _bh lock |
| 1282 | */ |
| 1283 | static void __ip_vs_del_service(struct ip_vs_service *svc) |
| 1284 | { |
| 1285 | struct ip_vs_dest *dest, *nxt; |
| 1286 | struct ip_vs_scheduler *old_sched; |
| 1287 | |
| 1288 | ip_vs_num_services--; |
| 1289 | ip_vs_kill_estimator(&svc->stats); |
| 1290 | |
| 1291 | /* Unbind scheduler */ |
| 1292 | old_sched = svc->scheduler; |
| 1293 | ip_vs_unbind_scheduler(svc); |
| 1294 | if (old_sched) |
| 1295 | ip_vs_scheduler_put(old_sched); |
| 1296 | |
| 1297 | /* Unbind app inc */ |
| 1298 | if (svc->inc) { |
| 1299 | ip_vs_app_inc_put(svc->inc); |
| 1300 | svc->inc = NULL; |
| 1301 | } |
| 1302 | |
| 1303 | /* |
| 1304 | * Unlink the whole destination list |
| 1305 | */ |
| 1306 | list_for_each_entry_safe(dest, nxt, &svc->destinations, n_list) { |
| 1307 | __ip_vs_unlink_dest(svc, dest, 0); |
| 1308 | __ip_vs_del_dest(dest); |
| 1309 | } |
| 1310 | |
| 1311 | /* |
| 1312 | * Update the virtual service counters |
| 1313 | */ |
| 1314 | if (svc->port == FTPPORT) |
| 1315 | atomic_dec(&ip_vs_ftpsvc_counter); |
| 1316 | else if (svc->port == 0) |
| 1317 | atomic_dec(&ip_vs_nullsvc_counter); |
| 1318 | |
| 1319 | /* |
| 1320 | * Free the service if nobody refers to it |
| 1321 | */ |
| 1322 | if (atomic_read(&svc->refcnt) == 0) |
| 1323 | kfree(svc); |
| 1324 | |
| 1325 | /* decrease the module use count */ |
| 1326 | ip_vs_use_count_dec(); |
| 1327 | } |
| 1328 | |
| 1329 | /* |
| 1330 | * Delete a service from the service list |
| 1331 | */ |
| 1332 | static int ip_vs_del_service(struct ip_vs_service *svc) |
| 1333 | { |
| 1334 | if (svc == NULL) |
| 1335 | return -EEXIST; |
| 1336 | |
| 1337 | /* |
| 1338 | * Unhash it from the service table |
| 1339 | */ |
| 1340 | write_lock_bh(&__ip_vs_svc_lock); |
| 1341 | |
| 1342 | ip_vs_svc_unhash(svc); |
| 1343 | |
| 1344 | /* |
| 1345 | * Wait until all the svc users go away. |
| 1346 | */ |
| 1347 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1); |
| 1348 | |
| 1349 | __ip_vs_del_service(svc); |
| 1350 | |
| 1351 | write_unlock_bh(&__ip_vs_svc_lock); |
| 1352 | |
| 1353 | return 0; |
| 1354 | } |
| 1355 | |
| 1356 | |
| 1357 | /* |
| 1358 | * Flush all the virtual services |
| 1359 | */ |
| 1360 | static int ip_vs_flush(void) |
| 1361 | { |
| 1362 | int idx; |
| 1363 | struct ip_vs_service *svc, *nxt; |
| 1364 | |
| 1365 | /* |
| 1366 | * Flush the service table hashed by <protocol,addr,port> |
| 1367 | */ |
| 1368 | for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { |
| 1369 | list_for_each_entry_safe(svc, nxt, &ip_vs_svc_table[idx], s_list) { |
| 1370 | write_lock_bh(&__ip_vs_svc_lock); |
| 1371 | ip_vs_svc_unhash(svc); |
| 1372 | /* |
| 1373 | * Wait until all the svc users go away. |
| 1374 | */ |
| 1375 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 0); |
| 1376 | __ip_vs_del_service(svc); |
| 1377 | write_unlock_bh(&__ip_vs_svc_lock); |
| 1378 | } |
| 1379 | } |
| 1380 | |
| 1381 | /* |
| 1382 | * Flush the service table hashed by fwmark |
| 1383 | */ |
| 1384 | for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { |
| 1385 | list_for_each_entry_safe(svc, nxt, |
| 1386 | &ip_vs_svc_fwm_table[idx], f_list) { |
| 1387 | write_lock_bh(&__ip_vs_svc_lock); |
| 1388 | ip_vs_svc_unhash(svc); |
| 1389 | /* |
| 1390 | * Wait until all the svc users go away. |
| 1391 | */ |
| 1392 | IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 0); |
| 1393 | __ip_vs_del_service(svc); |
| 1394 | write_unlock_bh(&__ip_vs_svc_lock); |
| 1395 | } |
| 1396 | } |
| 1397 | |
| 1398 | return 0; |
| 1399 | } |
| 1400 | |
| 1401 | |
| 1402 | /* |
| 1403 | * Zero counters in a service or all services |
| 1404 | */ |
| 1405 | static int ip_vs_zero_service(struct ip_vs_service *svc) |
| 1406 | { |
| 1407 | struct ip_vs_dest *dest; |
| 1408 | |
| 1409 | write_lock_bh(&__ip_vs_svc_lock); |
| 1410 | list_for_each_entry(dest, &svc->destinations, n_list) { |
| 1411 | ip_vs_zero_stats(&dest->stats); |
| 1412 | } |
| 1413 | ip_vs_zero_stats(&svc->stats); |
| 1414 | write_unlock_bh(&__ip_vs_svc_lock); |
| 1415 | return 0; |
| 1416 | } |
| 1417 | |
| 1418 | static int ip_vs_zero_all(void) |
| 1419 | { |
| 1420 | int idx; |
| 1421 | struct ip_vs_service *svc; |
| 1422 | |
| 1423 | for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { |
| 1424 | list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) { |
| 1425 | ip_vs_zero_service(svc); |
| 1426 | } |
| 1427 | } |
| 1428 | |
| 1429 | for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { |
| 1430 | list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) { |
| 1431 | ip_vs_zero_service(svc); |
| 1432 | } |
| 1433 | } |
| 1434 | |
| 1435 | ip_vs_zero_stats(&ip_vs_stats); |
| 1436 | return 0; |
| 1437 | } |
| 1438 | |
| 1439 | |
| 1440 | static int |
| 1441 | proc_do_defense_mode(ctl_table *table, int write, struct file * filp, |
| 1442 | void __user *buffer, size_t *lenp, loff_t *ppos) |
| 1443 | { |
| 1444 | int *valp = table->data; |
| 1445 | int val = *valp; |
| 1446 | int rc; |
| 1447 | |
| 1448 | rc = proc_dointvec(table, write, filp, buffer, lenp, ppos); |
| 1449 | if (write && (*valp != val)) { |
| 1450 | if ((*valp < 0) || (*valp > 3)) { |
| 1451 | /* Restore the correct value */ |
| 1452 | *valp = val; |
| 1453 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1454 | update_defense_level(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1455 | } |
| 1456 | } |
| 1457 | return rc; |
| 1458 | } |
| 1459 | |
| 1460 | |
| 1461 | static int |
| 1462 | proc_do_sync_threshold(ctl_table *table, int write, struct file *filp, |
| 1463 | void __user *buffer, size_t *lenp, loff_t *ppos) |
| 1464 | { |
| 1465 | int *valp = table->data; |
| 1466 | int val[2]; |
| 1467 | int rc; |
| 1468 | |
| 1469 | /* backup the value first */ |
| 1470 | memcpy(val, valp, sizeof(val)); |
| 1471 | |
| 1472 | rc = proc_dointvec(table, write, filp, buffer, lenp, ppos); |
| 1473 | if (write && (valp[0] < 0 || valp[1] < 0 || valp[0] >= valp[1])) { |
| 1474 | /* Restore the correct value */ |
| 1475 | memcpy(valp, val, sizeof(val)); |
| 1476 | } |
| 1477 | return rc; |
| 1478 | } |
| 1479 | |
| 1480 | |
| 1481 | /* |
| 1482 | * IPVS sysctl table (under the /proc/sys/net/ipv4/vs/) |
| 1483 | */ |
| 1484 | |
| 1485 | static struct ctl_table vs_vars[] = { |
| 1486 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1487 | .procname = "amemthresh", |
| 1488 | .data = &sysctl_ip_vs_amemthresh, |
| 1489 | .maxlen = sizeof(int), |
| 1490 | .mode = 0644, |
| 1491 | .proc_handler = &proc_dointvec, |
| 1492 | }, |
| 1493 | #ifdef CONFIG_IP_VS_DEBUG |
| 1494 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1495 | .procname = "debug_level", |
| 1496 | .data = &sysctl_ip_vs_debug_level, |
| 1497 | .maxlen = sizeof(int), |
| 1498 | .mode = 0644, |
| 1499 | .proc_handler = &proc_dointvec, |
| 1500 | }, |
| 1501 | #endif |
| 1502 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1503 | .procname = "am_droprate", |
| 1504 | .data = &sysctl_ip_vs_am_droprate, |
| 1505 | .maxlen = sizeof(int), |
| 1506 | .mode = 0644, |
| 1507 | .proc_handler = &proc_dointvec, |
| 1508 | }, |
| 1509 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1510 | .procname = "drop_entry", |
| 1511 | .data = &sysctl_ip_vs_drop_entry, |
| 1512 | .maxlen = sizeof(int), |
| 1513 | .mode = 0644, |
| 1514 | .proc_handler = &proc_do_defense_mode, |
| 1515 | }, |
| 1516 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1517 | .procname = "drop_packet", |
| 1518 | .data = &sysctl_ip_vs_drop_packet, |
| 1519 | .maxlen = sizeof(int), |
| 1520 | .mode = 0644, |
| 1521 | .proc_handler = &proc_do_defense_mode, |
| 1522 | }, |
| 1523 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1524 | .procname = "secure_tcp", |
| 1525 | .data = &sysctl_ip_vs_secure_tcp, |
| 1526 | .maxlen = sizeof(int), |
| 1527 | .mode = 0644, |
| 1528 | .proc_handler = &proc_do_defense_mode, |
| 1529 | }, |
| 1530 | #if 0 |
| 1531 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1532 | .procname = "timeout_established", |
| 1533 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_ESTABLISHED], |
| 1534 | .maxlen = sizeof(int), |
| 1535 | .mode = 0644, |
| 1536 | .proc_handler = &proc_dointvec_jiffies, |
| 1537 | }, |
| 1538 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1539 | .procname = "timeout_synsent", |
| 1540 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYN_SENT], |
| 1541 | .maxlen = sizeof(int), |
| 1542 | .mode = 0644, |
| 1543 | .proc_handler = &proc_dointvec_jiffies, |
| 1544 | }, |
| 1545 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1546 | .procname = "timeout_synrecv", |
| 1547 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYN_RECV], |
| 1548 | .maxlen = sizeof(int), |
| 1549 | .mode = 0644, |
| 1550 | .proc_handler = &proc_dointvec_jiffies, |
| 1551 | }, |
| 1552 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1553 | .procname = "timeout_finwait", |
| 1554 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_FIN_WAIT], |
| 1555 | .maxlen = sizeof(int), |
| 1556 | .mode = 0644, |
| 1557 | .proc_handler = &proc_dointvec_jiffies, |
| 1558 | }, |
| 1559 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1560 | .procname = "timeout_timewait", |
| 1561 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_TIME_WAIT], |
| 1562 | .maxlen = sizeof(int), |
| 1563 | .mode = 0644, |
| 1564 | .proc_handler = &proc_dointvec_jiffies, |
| 1565 | }, |
| 1566 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1567 | .procname = "timeout_close", |
| 1568 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_CLOSE], |
| 1569 | .maxlen = sizeof(int), |
| 1570 | .mode = 0644, |
| 1571 | .proc_handler = &proc_dointvec_jiffies, |
| 1572 | }, |
| 1573 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1574 | .procname = "timeout_closewait", |
| 1575 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_CLOSE_WAIT], |
| 1576 | .maxlen = sizeof(int), |
| 1577 | .mode = 0644, |
| 1578 | .proc_handler = &proc_dointvec_jiffies, |
| 1579 | }, |
| 1580 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1581 | .procname = "timeout_lastack", |
| 1582 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_LAST_ACK], |
| 1583 | .maxlen = sizeof(int), |
| 1584 | .mode = 0644, |
| 1585 | .proc_handler = &proc_dointvec_jiffies, |
| 1586 | }, |
| 1587 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1588 | .procname = "timeout_listen", |
| 1589 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_LISTEN], |
| 1590 | .maxlen = sizeof(int), |
| 1591 | .mode = 0644, |
| 1592 | .proc_handler = &proc_dointvec_jiffies, |
| 1593 | }, |
| 1594 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1595 | .procname = "timeout_synack", |
| 1596 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYNACK], |
| 1597 | .maxlen = sizeof(int), |
| 1598 | .mode = 0644, |
| 1599 | .proc_handler = &proc_dointvec_jiffies, |
| 1600 | }, |
| 1601 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1602 | .procname = "timeout_udp", |
| 1603 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_UDP], |
| 1604 | .maxlen = sizeof(int), |
| 1605 | .mode = 0644, |
| 1606 | .proc_handler = &proc_dointvec_jiffies, |
| 1607 | }, |
| 1608 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1609 | .procname = "timeout_icmp", |
| 1610 | .data = &vs_timeout_table_dos.timeout[IP_VS_S_ICMP], |
| 1611 | .maxlen = sizeof(int), |
| 1612 | .mode = 0644, |
| 1613 | .proc_handler = &proc_dointvec_jiffies, |
| 1614 | }, |
| 1615 | #endif |
| 1616 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1617 | .procname = "cache_bypass", |
| 1618 | .data = &sysctl_ip_vs_cache_bypass, |
| 1619 | .maxlen = sizeof(int), |
| 1620 | .mode = 0644, |
| 1621 | .proc_handler = &proc_dointvec, |
| 1622 | }, |
| 1623 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1624 | .procname = "expire_nodest_conn", |
| 1625 | .data = &sysctl_ip_vs_expire_nodest_conn, |
| 1626 | .maxlen = sizeof(int), |
| 1627 | .mode = 0644, |
| 1628 | .proc_handler = &proc_dointvec, |
| 1629 | }, |
| 1630 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1631 | .procname = "expire_quiescent_template", |
| 1632 | .data = &sysctl_ip_vs_expire_quiescent_template, |
| 1633 | .maxlen = sizeof(int), |
| 1634 | .mode = 0644, |
| 1635 | .proc_handler = &proc_dointvec, |
| 1636 | }, |
| 1637 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1638 | .procname = "sync_threshold", |
| 1639 | .data = &sysctl_ip_vs_sync_threshold, |
| 1640 | .maxlen = sizeof(sysctl_ip_vs_sync_threshold), |
| 1641 | .mode = 0644, |
| 1642 | .proc_handler = &proc_do_sync_threshold, |
| 1643 | }, |
| 1644 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1645 | .procname = "nat_icmp_send", |
| 1646 | .data = &sysctl_ip_vs_nat_icmp_send, |
| 1647 | .maxlen = sizeof(int), |
| 1648 | .mode = 0644, |
| 1649 | .proc_handler = &proc_dointvec, |
| 1650 | }, |
| 1651 | { .ctl_name = 0 } |
| 1652 | }; |
| 1653 | |
Sven Wegener | 5587da5 | 2008-08-10 18:24:40 +0000 | [diff] [blame] | 1654 | const struct ctl_path net_vs_ctl_path[] = { |
Pavel Emelyanov | 90754f8 | 2008-01-12 02:33:50 -0800 | [diff] [blame] | 1655 | { .procname = "net", .ctl_name = CTL_NET, }, |
| 1656 | { .procname = "ipv4", .ctl_name = NET_IPV4, }, |
| 1657 | { .procname = "vs", }, |
| 1658 | { } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1659 | }; |
Pavel Emelyanov | 90754f8 | 2008-01-12 02:33:50 -0800 | [diff] [blame] | 1660 | EXPORT_SYMBOL_GPL(net_vs_ctl_path); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1661 | |
| 1662 | static struct ctl_table_header * sysctl_header; |
| 1663 | |
| 1664 | #ifdef CONFIG_PROC_FS |
| 1665 | |
| 1666 | struct ip_vs_iter { |
| 1667 | struct list_head *table; |
| 1668 | int bucket; |
| 1669 | }; |
| 1670 | |
| 1671 | /* |
| 1672 | * Write the contents of the VS rule table to a PROCfs file. |
| 1673 | * (It is kept just for backward compatibility) |
| 1674 | */ |
| 1675 | static inline const char *ip_vs_fwd_name(unsigned flags) |
| 1676 | { |
| 1677 | switch (flags & IP_VS_CONN_F_FWD_MASK) { |
| 1678 | case IP_VS_CONN_F_LOCALNODE: |
| 1679 | return "Local"; |
| 1680 | case IP_VS_CONN_F_TUNNEL: |
| 1681 | return "Tunnel"; |
| 1682 | case IP_VS_CONN_F_DROUTE: |
| 1683 | return "Route"; |
| 1684 | default: |
| 1685 | return "Masq"; |
| 1686 | } |
| 1687 | } |
| 1688 | |
| 1689 | |
| 1690 | /* Get the Nth entry in the two lists */ |
| 1691 | static struct ip_vs_service *ip_vs_info_array(struct seq_file *seq, loff_t pos) |
| 1692 | { |
| 1693 | struct ip_vs_iter *iter = seq->private; |
| 1694 | int idx; |
| 1695 | struct ip_vs_service *svc; |
| 1696 | |
| 1697 | /* look in hash by protocol */ |
| 1698 | for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { |
| 1699 | list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) { |
| 1700 | if (pos-- == 0){ |
| 1701 | iter->table = ip_vs_svc_table; |
| 1702 | iter->bucket = idx; |
| 1703 | return svc; |
| 1704 | } |
| 1705 | } |
| 1706 | } |
| 1707 | |
| 1708 | /* keep looking in fwmark */ |
| 1709 | for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { |
| 1710 | list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) { |
| 1711 | if (pos-- == 0) { |
| 1712 | iter->table = ip_vs_svc_fwm_table; |
| 1713 | iter->bucket = idx; |
| 1714 | return svc; |
| 1715 | } |
| 1716 | } |
| 1717 | } |
| 1718 | |
| 1719 | return NULL; |
| 1720 | } |
| 1721 | |
| 1722 | static void *ip_vs_info_seq_start(struct seq_file *seq, loff_t *pos) |
| 1723 | { |
| 1724 | |
| 1725 | read_lock_bh(&__ip_vs_svc_lock); |
| 1726 | return *pos ? ip_vs_info_array(seq, *pos - 1) : SEQ_START_TOKEN; |
| 1727 | } |
| 1728 | |
| 1729 | |
| 1730 | static void *ip_vs_info_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| 1731 | { |
| 1732 | struct list_head *e; |
| 1733 | struct ip_vs_iter *iter; |
| 1734 | struct ip_vs_service *svc; |
| 1735 | |
| 1736 | ++*pos; |
| 1737 | if (v == SEQ_START_TOKEN) |
| 1738 | return ip_vs_info_array(seq,0); |
| 1739 | |
| 1740 | svc = v; |
| 1741 | iter = seq->private; |
| 1742 | |
| 1743 | if (iter->table == ip_vs_svc_table) { |
| 1744 | /* next service in table hashed by protocol */ |
| 1745 | if ((e = svc->s_list.next) != &ip_vs_svc_table[iter->bucket]) |
| 1746 | return list_entry(e, struct ip_vs_service, s_list); |
| 1747 | |
| 1748 | |
| 1749 | while (++iter->bucket < IP_VS_SVC_TAB_SIZE) { |
| 1750 | list_for_each_entry(svc,&ip_vs_svc_table[iter->bucket], |
| 1751 | s_list) { |
| 1752 | return svc; |
| 1753 | } |
| 1754 | } |
| 1755 | |
| 1756 | iter->table = ip_vs_svc_fwm_table; |
| 1757 | iter->bucket = -1; |
| 1758 | goto scan_fwmark; |
| 1759 | } |
| 1760 | |
| 1761 | /* next service in hashed by fwmark */ |
| 1762 | if ((e = svc->f_list.next) != &ip_vs_svc_fwm_table[iter->bucket]) |
| 1763 | return list_entry(e, struct ip_vs_service, f_list); |
| 1764 | |
| 1765 | scan_fwmark: |
| 1766 | while (++iter->bucket < IP_VS_SVC_TAB_SIZE) { |
| 1767 | list_for_each_entry(svc, &ip_vs_svc_fwm_table[iter->bucket], |
| 1768 | f_list) |
| 1769 | return svc; |
| 1770 | } |
| 1771 | |
| 1772 | return NULL; |
| 1773 | } |
| 1774 | |
| 1775 | static void ip_vs_info_seq_stop(struct seq_file *seq, void *v) |
| 1776 | { |
| 1777 | read_unlock_bh(&__ip_vs_svc_lock); |
| 1778 | } |
| 1779 | |
| 1780 | |
| 1781 | static int ip_vs_info_seq_show(struct seq_file *seq, void *v) |
| 1782 | { |
| 1783 | if (v == SEQ_START_TOKEN) { |
| 1784 | seq_printf(seq, |
| 1785 | "IP Virtual Server version %d.%d.%d (size=%d)\n", |
| 1786 | NVERSION(IP_VS_VERSION_CODE), IP_VS_CONN_TAB_SIZE); |
| 1787 | seq_puts(seq, |
| 1788 | "Prot LocalAddress:Port Scheduler Flags\n"); |
| 1789 | seq_puts(seq, |
| 1790 | " -> RemoteAddress:Port Forward Weight ActiveConn InActConn\n"); |
| 1791 | } else { |
| 1792 | const struct ip_vs_service *svc = v; |
| 1793 | const struct ip_vs_iter *iter = seq->private; |
| 1794 | const struct ip_vs_dest *dest; |
| 1795 | |
Vince Busam | 667a5f1 | 2008-09-02 15:55:49 +0200 | [diff] [blame^] | 1796 | if (iter->table == ip_vs_svc_table) { |
| 1797 | #ifdef CONFIG_IP_VS_IPV6 |
| 1798 | if (svc->af == AF_INET6) |
| 1799 | seq_printf(seq, "%s [" NIP6_FMT "]:%04X %s ", |
| 1800 | ip_vs_proto_name(svc->protocol), |
| 1801 | NIP6(svc->addr.in6), |
| 1802 | ntohs(svc->port), |
| 1803 | svc->scheduler->name); |
| 1804 | else |
| 1805 | #endif |
| 1806 | seq_printf(seq, "%s %08X:%04X %s ", |
| 1807 | ip_vs_proto_name(svc->protocol), |
| 1808 | ntohl(svc->addr.ip), |
| 1809 | ntohs(svc->port), |
| 1810 | svc->scheduler->name); |
| 1811 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1812 | seq_printf(seq, "FWM %08X %s ", |
| 1813 | svc->fwmark, svc->scheduler->name); |
Vince Busam | 667a5f1 | 2008-09-02 15:55:49 +0200 | [diff] [blame^] | 1814 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1815 | |
| 1816 | if (svc->flags & IP_VS_SVC_F_PERSISTENT) |
| 1817 | seq_printf(seq, "persistent %d %08X\n", |
| 1818 | svc->timeout, |
| 1819 | ntohl(svc->netmask)); |
| 1820 | else |
| 1821 | seq_putc(seq, '\n'); |
| 1822 | |
| 1823 | list_for_each_entry(dest, &svc->destinations, n_list) { |
Vince Busam | 667a5f1 | 2008-09-02 15:55:49 +0200 | [diff] [blame^] | 1824 | #ifdef CONFIG_IP_VS_IPV6 |
| 1825 | if (dest->af == AF_INET6) |
| 1826 | seq_printf(seq, |
| 1827 | " -> [" NIP6_FMT "]:%04X" |
| 1828 | " %-7s %-6d %-10d %-10d\n", |
| 1829 | NIP6(dest->addr.in6), |
| 1830 | ntohs(dest->port), |
| 1831 | ip_vs_fwd_name(atomic_read(&dest->conn_flags)), |
| 1832 | atomic_read(&dest->weight), |
| 1833 | atomic_read(&dest->activeconns), |
| 1834 | atomic_read(&dest->inactconns)); |
| 1835 | else |
| 1836 | #endif |
| 1837 | seq_printf(seq, |
| 1838 | " -> %08X:%04X " |
| 1839 | "%-7s %-6d %-10d %-10d\n", |
| 1840 | ntohl(dest->addr.ip), |
| 1841 | ntohs(dest->port), |
| 1842 | ip_vs_fwd_name(atomic_read(&dest->conn_flags)), |
| 1843 | atomic_read(&dest->weight), |
| 1844 | atomic_read(&dest->activeconns), |
| 1845 | atomic_read(&dest->inactconns)); |
| 1846 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1847 | } |
| 1848 | } |
| 1849 | return 0; |
| 1850 | } |
| 1851 | |
Philippe De Muyter | 56b3d97 | 2007-07-10 23:07:31 -0700 | [diff] [blame] | 1852 | static const struct seq_operations ip_vs_info_seq_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1853 | .start = ip_vs_info_seq_start, |
| 1854 | .next = ip_vs_info_seq_next, |
| 1855 | .stop = ip_vs_info_seq_stop, |
| 1856 | .show = ip_vs_info_seq_show, |
| 1857 | }; |
| 1858 | |
| 1859 | static int ip_vs_info_open(struct inode *inode, struct file *file) |
| 1860 | { |
Pavel Emelyanov | cf7732e | 2007-10-10 02:29:29 -0700 | [diff] [blame] | 1861 | return seq_open_private(file, &ip_vs_info_seq_ops, |
| 1862 | sizeof(struct ip_vs_iter)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1863 | } |
| 1864 | |
Arjan van de Ven | 9a32144 | 2007-02-12 00:55:35 -0800 | [diff] [blame] | 1865 | static const struct file_operations ip_vs_info_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1866 | .owner = THIS_MODULE, |
| 1867 | .open = ip_vs_info_open, |
| 1868 | .read = seq_read, |
| 1869 | .llseek = seq_lseek, |
| 1870 | .release = seq_release_private, |
| 1871 | }; |
| 1872 | |
| 1873 | #endif |
| 1874 | |
Sven Wegener | 519e49e | 2008-08-10 18:24:41 +0000 | [diff] [blame] | 1875 | struct ip_vs_stats ip_vs_stats = { |
| 1876 | .lock = __SPIN_LOCK_UNLOCKED(ip_vs_stats.lock), |
| 1877 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1878 | |
| 1879 | #ifdef CONFIG_PROC_FS |
| 1880 | static int ip_vs_stats_show(struct seq_file *seq, void *v) |
| 1881 | { |
| 1882 | |
| 1883 | /* 01234567 01234567 01234567 0123456701234567 0123456701234567 */ |
| 1884 | seq_puts(seq, |
| 1885 | " Total Incoming Outgoing Incoming Outgoing\n"); |
| 1886 | seq_printf(seq, |
| 1887 | " Conns Packets Packets Bytes Bytes\n"); |
| 1888 | |
| 1889 | spin_lock_bh(&ip_vs_stats.lock); |
| 1890 | seq_printf(seq, "%8X %8X %8X %16LX %16LX\n\n", ip_vs_stats.conns, |
| 1891 | ip_vs_stats.inpkts, ip_vs_stats.outpkts, |
| 1892 | (unsigned long long) ip_vs_stats.inbytes, |
| 1893 | (unsigned long long) ip_vs_stats.outbytes); |
| 1894 | |
| 1895 | /* 01234567 01234567 01234567 0123456701234567 0123456701234567 */ |
| 1896 | seq_puts(seq, |
| 1897 | " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n"); |
| 1898 | seq_printf(seq,"%8X %8X %8X %16X %16X\n", |
| 1899 | ip_vs_stats.cps, |
| 1900 | ip_vs_stats.inpps, |
| 1901 | ip_vs_stats.outpps, |
| 1902 | ip_vs_stats.inbps, |
| 1903 | ip_vs_stats.outbps); |
| 1904 | spin_unlock_bh(&ip_vs_stats.lock); |
| 1905 | |
| 1906 | return 0; |
| 1907 | } |
| 1908 | |
| 1909 | static int ip_vs_stats_seq_open(struct inode *inode, struct file *file) |
| 1910 | { |
| 1911 | return single_open(file, ip_vs_stats_show, NULL); |
| 1912 | } |
| 1913 | |
Arjan van de Ven | 9a32144 | 2007-02-12 00:55:35 -0800 | [diff] [blame] | 1914 | static const struct file_operations ip_vs_stats_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1915 | .owner = THIS_MODULE, |
| 1916 | .open = ip_vs_stats_seq_open, |
| 1917 | .read = seq_read, |
| 1918 | .llseek = seq_lseek, |
| 1919 | .release = single_release, |
| 1920 | }; |
| 1921 | |
| 1922 | #endif |
| 1923 | |
| 1924 | /* |
| 1925 | * Set timeout values for tcp tcpfin udp in the timeout_table. |
| 1926 | */ |
| 1927 | static int ip_vs_set_timeout(struct ip_vs_timeout_user *u) |
| 1928 | { |
| 1929 | IP_VS_DBG(2, "Setting timeout tcp:%d tcpfin:%d udp:%d\n", |
| 1930 | u->tcp_timeout, |
| 1931 | u->tcp_fin_timeout, |
| 1932 | u->udp_timeout); |
| 1933 | |
| 1934 | #ifdef CONFIG_IP_VS_PROTO_TCP |
| 1935 | if (u->tcp_timeout) { |
| 1936 | ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_ESTABLISHED] |
| 1937 | = u->tcp_timeout * HZ; |
| 1938 | } |
| 1939 | |
| 1940 | if (u->tcp_fin_timeout) { |
| 1941 | ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_FIN_WAIT] |
| 1942 | = u->tcp_fin_timeout * HZ; |
| 1943 | } |
| 1944 | #endif |
| 1945 | |
| 1946 | #ifdef CONFIG_IP_VS_PROTO_UDP |
| 1947 | if (u->udp_timeout) { |
| 1948 | ip_vs_protocol_udp.timeout_table[IP_VS_UDP_S_NORMAL] |
| 1949 | = u->udp_timeout * HZ; |
| 1950 | } |
| 1951 | #endif |
| 1952 | return 0; |
| 1953 | } |
| 1954 | |
| 1955 | |
| 1956 | #define SET_CMDID(cmd) (cmd - IP_VS_BASE_CTL) |
| 1957 | #define SERVICE_ARG_LEN (sizeof(struct ip_vs_service_user)) |
| 1958 | #define SVCDEST_ARG_LEN (sizeof(struct ip_vs_service_user) + \ |
| 1959 | sizeof(struct ip_vs_dest_user)) |
| 1960 | #define TIMEOUT_ARG_LEN (sizeof(struct ip_vs_timeout_user)) |
| 1961 | #define DAEMON_ARG_LEN (sizeof(struct ip_vs_daemon_user)) |
| 1962 | #define MAX_ARG_LEN SVCDEST_ARG_LEN |
| 1963 | |
Arjan van de Ven | 9b5b5cf | 2005-11-29 16:21:38 -0800 | [diff] [blame] | 1964 | static const unsigned char set_arglen[SET_CMDID(IP_VS_SO_SET_MAX)+1] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1965 | [SET_CMDID(IP_VS_SO_SET_ADD)] = SERVICE_ARG_LEN, |
| 1966 | [SET_CMDID(IP_VS_SO_SET_EDIT)] = SERVICE_ARG_LEN, |
| 1967 | [SET_CMDID(IP_VS_SO_SET_DEL)] = SERVICE_ARG_LEN, |
| 1968 | [SET_CMDID(IP_VS_SO_SET_FLUSH)] = 0, |
| 1969 | [SET_CMDID(IP_VS_SO_SET_ADDDEST)] = SVCDEST_ARG_LEN, |
| 1970 | [SET_CMDID(IP_VS_SO_SET_DELDEST)] = SVCDEST_ARG_LEN, |
| 1971 | [SET_CMDID(IP_VS_SO_SET_EDITDEST)] = SVCDEST_ARG_LEN, |
| 1972 | [SET_CMDID(IP_VS_SO_SET_TIMEOUT)] = TIMEOUT_ARG_LEN, |
| 1973 | [SET_CMDID(IP_VS_SO_SET_STARTDAEMON)] = DAEMON_ARG_LEN, |
| 1974 | [SET_CMDID(IP_VS_SO_SET_STOPDAEMON)] = DAEMON_ARG_LEN, |
| 1975 | [SET_CMDID(IP_VS_SO_SET_ZERO)] = SERVICE_ARG_LEN, |
| 1976 | }; |
| 1977 | |
Julius Volz | c860c6b | 2008-09-02 15:55:36 +0200 | [diff] [blame] | 1978 | static void ip_vs_copy_usvc_compat(struct ip_vs_service_user_kern *usvc, |
| 1979 | struct ip_vs_service_user *usvc_compat) |
| 1980 | { |
| 1981 | usvc->af = AF_INET; |
| 1982 | usvc->protocol = usvc_compat->protocol; |
| 1983 | usvc->addr.ip = usvc_compat->addr; |
| 1984 | usvc->port = usvc_compat->port; |
| 1985 | usvc->fwmark = usvc_compat->fwmark; |
| 1986 | |
| 1987 | /* Deep copy of sched_name is not needed here */ |
| 1988 | usvc->sched_name = usvc_compat->sched_name; |
| 1989 | |
| 1990 | usvc->flags = usvc_compat->flags; |
| 1991 | usvc->timeout = usvc_compat->timeout; |
| 1992 | usvc->netmask = usvc_compat->netmask; |
| 1993 | } |
| 1994 | |
| 1995 | static void ip_vs_copy_udest_compat(struct ip_vs_dest_user_kern *udest, |
| 1996 | struct ip_vs_dest_user *udest_compat) |
| 1997 | { |
| 1998 | udest->addr.ip = udest_compat->addr; |
| 1999 | udest->port = udest_compat->port; |
| 2000 | udest->conn_flags = udest_compat->conn_flags; |
| 2001 | udest->weight = udest_compat->weight; |
| 2002 | udest->u_threshold = udest_compat->u_threshold; |
| 2003 | udest->l_threshold = udest_compat->l_threshold; |
| 2004 | } |
| 2005 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2006 | static int |
| 2007 | do_ip_vs_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len) |
| 2008 | { |
| 2009 | int ret; |
| 2010 | unsigned char arg[MAX_ARG_LEN]; |
Julius Volz | c860c6b | 2008-09-02 15:55:36 +0200 | [diff] [blame] | 2011 | struct ip_vs_service_user *usvc_compat; |
| 2012 | struct ip_vs_service_user_kern usvc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2013 | struct ip_vs_service *svc; |
Julius Volz | c860c6b | 2008-09-02 15:55:36 +0200 | [diff] [blame] | 2014 | struct ip_vs_dest_user *udest_compat; |
| 2015 | struct ip_vs_dest_user_kern udest; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2016 | |
| 2017 | if (!capable(CAP_NET_ADMIN)) |
| 2018 | return -EPERM; |
| 2019 | |
| 2020 | if (len != set_arglen[SET_CMDID(cmd)]) { |
| 2021 | IP_VS_ERR("set_ctl: len %u != %u\n", |
| 2022 | len, set_arglen[SET_CMDID(cmd)]); |
| 2023 | return -EINVAL; |
| 2024 | } |
| 2025 | |
| 2026 | if (copy_from_user(arg, user, len) != 0) |
| 2027 | return -EFAULT; |
| 2028 | |
| 2029 | /* increase the module use count */ |
| 2030 | ip_vs_use_count_inc(); |
| 2031 | |
Ingo Molnar | 14cc3e2 | 2006-03-26 01:37:14 -0800 | [diff] [blame] | 2032 | if (mutex_lock_interruptible(&__ip_vs_mutex)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2033 | ret = -ERESTARTSYS; |
| 2034 | goto out_dec; |
| 2035 | } |
| 2036 | |
| 2037 | if (cmd == IP_VS_SO_SET_FLUSH) { |
| 2038 | /* Flush the virtual service */ |
| 2039 | ret = ip_vs_flush(); |
| 2040 | goto out_unlock; |
| 2041 | } else if (cmd == IP_VS_SO_SET_TIMEOUT) { |
| 2042 | /* Set timeout values for (tcp tcpfin udp) */ |
| 2043 | ret = ip_vs_set_timeout((struct ip_vs_timeout_user *)arg); |
| 2044 | goto out_unlock; |
| 2045 | } else if (cmd == IP_VS_SO_SET_STARTDAEMON) { |
| 2046 | struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg; |
| 2047 | ret = start_sync_thread(dm->state, dm->mcast_ifn, dm->syncid); |
| 2048 | goto out_unlock; |
| 2049 | } else if (cmd == IP_VS_SO_SET_STOPDAEMON) { |
| 2050 | struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg; |
| 2051 | ret = stop_sync_thread(dm->state); |
| 2052 | goto out_unlock; |
| 2053 | } |
| 2054 | |
Julius Volz | c860c6b | 2008-09-02 15:55:36 +0200 | [diff] [blame] | 2055 | usvc_compat = (struct ip_vs_service_user *)arg; |
| 2056 | udest_compat = (struct ip_vs_dest_user *)(usvc_compat + 1); |
| 2057 | |
| 2058 | /* We only use the new structs internally, so copy userspace compat |
| 2059 | * structs to extended internal versions */ |
| 2060 | ip_vs_copy_usvc_compat(&usvc, usvc_compat); |
| 2061 | ip_vs_copy_udest_compat(&udest, udest_compat); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2062 | |
| 2063 | if (cmd == IP_VS_SO_SET_ZERO) { |
| 2064 | /* if no service address is set, zero counters in all */ |
Julius Volz | c860c6b | 2008-09-02 15:55:36 +0200 | [diff] [blame] | 2065 | if (!usvc.fwmark && !usvc.addr.ip && !usvc.port) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2066 | ret = ip_vs_zero_all(); |
| 2067 | goto out_unlock; |
| 2068 | } |
| 2069 | } |
| 2070 | |
| 2071 | /* Check for valid protocol: TCP or UDP, even for fwmark!=0 */ |
Julius Volz | c860c6b | 2008-09-02 15:55:36 +0200 | [diff] [blame] | 2072 | if (usvc.protocol != IPPROTO_TCP && usvc.protocol != IPPROTO_UDP) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2073 | IP_VS_ERR("set_ctl: invalid protocol: %d %d.%d.%d.%d:%d %s\n", |
Julius Volz | c860c6b | 2008-09-02 15:55:36 +0200 | [diff] [blame] | 2074 | usvc.protocol, NIPQUAD(usvc.addr.ip), |
| 2075 | ntohs(usvc.port), usvc.sched_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2076 | ret = -EFAULT; |
| 2077 | goto out_unlock; |
| 2078 | } |
| 2079 | |
| 2080 | /* Lookup the exact service by <protocol, addr, port> or fwmark */ |
Julius Volz | c860c6b | 2008-09-02 15:55:36 +0200 | [diff] [blame] | 2081 | if (usvc.fwmark == 0) |
Julius Volz | b18610d | 2008-09-02 15:55:37 +0200 | [diff] [blame] | 2082 | svc = __ip_vs_service_get(usvc.af, usvc.protocol, |
| 2083 | &usvc.addr, usvc.port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2084 | else |
Julius Volz | b18610d | 2008-09-02 15:55:37 +0200 | [diff] [blame] | 2085 | svc = __ip_vs_svc_fwm_get(usvc.af, usvc.fwmark); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2086 | |
| 2087 | if (cmd != IP_VS_SO_SET_ADD |
Julius Volz | c860c6b | 2008-09-02 15:55:36 +0200 | [diff] [blame] | 2088 | && (svc == NULL || svc->protocol != usvc.protocol)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2089 | ret = -ESRCH; |
| 2090 | goto out_unlock; |
| 2091 | } |
| 2092 | |
| 2093 | switch (cmd) { |
| 2094 | case IP_VS_SO_SET_ADD: |
| 2095 | if (svc != NULL) |
| 2096 | ret = -EEXIST; |
| 2097 | else |
Julius Volz | c860c6b | 2008-09-02 15:55:36 +0200 | [diff] [blame] | 2098 | ret = ip_vs_add_service(&usvc, &svc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2099 | break; |
| 2100 | case IP_VS_SO_SET_EDIT: |
Julius Volz | c860c6b | 2008-09-02 15:55:36 +0200 | [diff] [blame] | 2101 | ret = ip_vs_edit_service(svc, &usvc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2102 | break; |
| 2103 | case IP_VS_SO_SET_DEL: |
| 2104 | ret = ip_vs_del_service(svc); |
| 2105 | if (!ret) |
| 2106 | goto out_unlock; |
| 2107 | break; |
| 2108 | case IP_VS_SO_SET_ZERO: |
| 2109 | ret = ip_vs_zero_service(svc); |
| 2110 | break; |
| 2111 | case IP_VS_SO_SET_ADDDEST: |
Julius Volz | c860c6b | 2008-09-02 15:55:36 +0200 | [diff] [blame] | 2112 | ret = ip_vs_add_dest(svc, &udest); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2113 | break; |
| 2114 | case IP_VS_SO_SET_EDITDEST: |
Julius Volz | c860c6b | 2008-09-02 15:55:36 +0200 | [diff] [blame] | 2115 | ret = ip_vs_edit_dest(svc, &udest); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2116 | break; |
| 2117 | case IP_VS_SO_SET_DELDEST: |
Julius Volz | c860c6b | 2008-09-02 15:55:36 +0200 | [diff] [blame] | 2118 | ret = ip_vs_del_dest(svc, &udest); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2119 | break; |
| 2120 | default: |
| 2121 | ret = -EINVAL; |
| 2122 | } |
| 2123 | |
| 2124 | if (svc) |
| 2125 | ip_vs_service_put(svc); |
| 2126 | |
| 2127 | out_unlock: |
Ingo Molnar | 14cc3e2 | 2006-03-26 01:37:14 -0800 | [diff] [blame] | 2128 | mutex_unlock(&__ip_vs_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2129 | out_dec: |
| 2130 | /* decrease the module use count */ |
| 2131 | ip_vs_use_count_dec(); |
| 2132 | |
| 2133 | return ret; |
| 2134 | } |
| 2135 | |
| 2136 | |
| 2137 | static void |
| 2138 | ip_vs_copy_stats(struct ip_vs_stats_user *dst, struct ip_vs_stats *src) |
| 2139 | { |
| 2140 | spin_lock_bh(&src->lock); |
| 2141 | memcpy(dst, src, (char*)&src->lock - (char*)src); |
| 2142 | spin_unlock_bh(&src->lock); |
| 2143 | } |
| 2144 | |
| 2145 | static void |
| 2146 | ip_vs_copy_service(struct ip_vs_service_entry *dst, struct ip_vs_service *src) |
| 2147 | { |
| 2148 | dst->protocol = src->protocol; |
Julius Volz | e7ade46 | 2008-09-02 15:55:33 +0200 | [diff] [blame] | 2149 | dst->addr = src->addr.ip; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2150 | dst->port = src->port; |
| 2151 | dst->fwmark = src->fwmark; |
pageexec | 4da62fc | 2005-06-26 16:00:19 -0700 | [diff] [blame] | 2152 | strlcpy(dst->sched_name, src->scheduler->name, sizeof(dst->sched_name)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2153 | dst->flags = src->flags; |
| 2154 | dst->timeout = src->timeout / HZ; |
| 2155 | dst->netmask = src->netmask; |
| 2156 | dst->num_dests = src->num_dests; |
| 2157 | ip_vs_copy_stats(&dst->stats, &src->stats); |
| 2158 | } |
| 2159 | |
| 2160 | static inline int |
| 2161 | __ip_vs_get_service_entries(const struct ip_vs_get_services *get, |
| 2162 | struct ip_vs_get_services __user *uptr) |
| 2163 | { |
| 2164 | int idx, count=0; |
| 2165 | struct ip_vs_service *svc; |
| 2166 | struct ip_vs_service_entry entry; |
| 2167 | int ret = 0; |
| 2168 | |
| 2169 | for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { |
| 2170 | list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) { |
| 2171 | if (count >= get->num_services) |
| 2172 | goto out; |
pageexec | 4da62fc | 2005-06-26 16:00:19 -0700 | [diff] [blame] | 2173 | memset(&entry, 0, sizeof(entry)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2174 | ip_vs_copy_service(&entry, svc); |
| 2175 | if (copy_to_user(&uptr->entrytable[count], |
| 2176 | &entry, sizeof(entry))) { |
| 2177 | ret = -EFAULT; |
| 2178 | goto out; |
| 2179 | } |
| 2180 | count++; |
| 2181 | } |
| 2182 | } |
| 2183 | |
| 2184 | for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { |
| 2185 | list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) { |
| 2186 | if (count >= get->num_services) |
| 2187 | goto out; |
pageexec | 4da62fc | 2005-06-26 16:00:19 -0700 | [diff] [blame] | 2188 | memset(&entry, 0, sizeof(entry)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2189 | ip_vs_copy_service(&entry, svc); |
| 2190 | if (copy_to_user(&uptr->entrytable[count], |
| 2191 | &entry, sizeof(entry))) { |
| 2192 | ret = -EFAULT; |
| 2193 | goto out; |
| 2194 | } |
| 2195 | count++; |
| 2196 | } |
| 2197 | } |
| 2198 | out: |
| 2199 | return ret; |
| 2200 | } |
| 2201 | |
| 2202 | static inline int |
| 2203 | __ip_vs_get_dest_entries(const struct ip_vs_get_dests *get, |
| 2204 | struct ip_vs_get_dests __user *uptr) |
| 2205 | { |
| 2206 | struct ip_vs_service *svc; |
Julius Volz | b18610d | 2008-09-02 15:55:37 +0200 | [diff] [blame] | 2207 | union nf_inet_addr addr = { .ip = get->addr }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2208 | int ret = 0; |
| 2209 | |
| 2210 | if (get->fwmark) |
Julius Volz | b18610d | 2008-09-02 15:55:37 +0200 | [diff] [blame] | 2211 | svc = __ip_vs_svc_fwm_get(AF_INET, get->fwmark); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2212 | else |
Julius Volz | b18610d | 2008-09-02 15:55:37 +0200 | [diff] [blame] | 2213 | svc = __ip_vs_service_get(AF_INET, get->protocol, &addr, |
| 2214 | get->port); |
| 2215 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2216 | if (svc) { |
| 2217 | int count = 0; |
| 2218 | struct ip_vs_dest *dest; |
| 2219 | struct ip_vs_dest_entry entry; |
| 2220 | |
| 2221 | list_for_each_entry(dest, &svc->destinations, n_list) { |
| 2222 | if (count >= get->num_dests) |
| 2223 | break; |
| 2224 | |
Julius Volz | e7ade46 | 2008-09-02 15:55:33 +0200 | [diff] [blame] | 2225 | entry.addr = dest->addr.ip; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2226 | entry.port = dest->port; |
| 2227 | entry.conn_flags = atomic_read(&dest->conn_flags); |
| 2228 | entry.weight = atomic_read(&dest->weight); |
| 2229 | entry.u_threshold = dest->u_threshold; |
| 2230 | entry.l_threshold = dest->l_threshold; |
| 2231 | entry.activeconns = atomic_read(&dest->activeconns); |
| 2232 | entry.inactconns = atomic_read(&dest->inactconns); |
| 2233 | entry.persistconns = atomic_read(&dest->persistconns); |
| 2234 | ip_vs_copy_stats(&entry.stats, &dest->stats); |
| 2235 | if (copy_to_user(&uptr->entrytable[count], |
| 2236 | &entry, sizeof(entry))) { |
| 2237 | ret = -EFAULT; |
| 2238 | break; |
| 2239 | } |
| 2240 | count++; |
| 2241 | } |
| 2242 | ip_vs_service_put(svc); |
| 2243 | } else |
| 2244 | ret = -ESRCH; |
| 2245 | return ret; |
| 2246 | } |
| 2247 | |
| 2248 | static inline void |
| 2249 | __ip_vs_get_timeouts(struct ip_vs_timeout_user *u) |
| 2250 | { |
| 2251 | #ifdef CONFIG_IP_VS_PROTO_TCP |
| 2252 | u->tcp_timeout = |
| 2253 | ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_ESTABLISHED] / HZ; |
| 2254 | u->tcp_fin_timeout = |
| 2255 | ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_FIN_WAIT] / HZ; |
| 2256 | #endif |
| 2257 | #ifdef CONFIG_IP_VS_PROTO_UDP |
| 2258 | u->udp_timeout = |
| 2259 | ip_vs_protocol_udp.timeout_table[IP_VS_UDP_S_NORMAL] / HZ; |
| 2260 | #endif |
| 2261 | } |
| 2262 | |
| 2263 | |
| 2264 | #define GET_CMDID(cmd) (cmd - IP_VS_BASE_CTL) |
| 2265 | #define GET_INFO_ARG_LEN (sizeof(struct ip_vs_getinfo)) |
| 2266 | #define GET_SERVICES_ARG_LEN (sizeof(struct ip_vs_get_services)) |
| 2267 | #define GET_SERVICE_ARG_LEN (sizeof(struct ip_vs_service_entry)) |
| 2268 | #define GET_DESTS_ARG_LEN (sizeof(struct ip_vs_get_dests)) |
| 2269 | #define GET_TIMEOUT_ARG_LEN (sizeof(struct ip_vs_timeout_user)) |
| 2270 | #define GET_DAEMON_ARG_LEN (sizeof(struct ip_vs_daemon_user) * 2) |
| 2271 | |
Arjan van de Ven | 9b5b5cf | 2005-11-29 16:21:38 -0800 | [diff] [blame] | 2272 | static const unsigned char get_arglen[GET_CMDID(IP_VS_SO_GET_MAX)+1] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2273 | [GET_CMDID(IP_VS_SO_GET_VERSION)] = 64, |
| 2274 | [GET_CMDID(IP_VS_SO_GET_INFO)] = GET_INFO_ARG_LEN, |
| 2275 | [GET_CMDID(IP_VS_SO_GET_SERVICES)] = GET_SERVICES_ARG_LEN, |
| 2276 | [GET_CMDID(IP_VS_SO_GET_SERVICE)] = GET_SERVICE_ARG_LEN, |
| 2277 | [GET_CMDID(IP_VS_SO_GET_DESTS)] = GET_DESTS_ARG_LEN, |
| 2278 | [GET_CMDID(IP_VS_SO_GET_TIMEOUT)] = GET_TIMEOUT_ARG_LEN, |
| 2279 | [GET_CMDID(IP_VS_SO_GET_DAEMON)] = GET_DAEMON_ARG_LEN, |
| 2280 | }; |
| 2281 | |
| 2282 | static int |
| 2283 | do_ip_vs_get_ctl(struct sock *sk, int cmd, void __user *user, int *len) |
| 2284 | { |
| 2285 | unsigned char arg[128]; |
| 2286 | int ret = 0; |
| 2287 | |
| 2288 | if (!capable(CAP_NET_ADMIN)) |
| 2289 | return -EPERM; |
| 2290 | |
| 2291 | if (*len < get_arglen[GET_CMDID(cmd)]) { |
| 2292 | IP_VS_ERR("get_ctl: len %u < %u\n", |
| 2293 | *len, get_arglen[GET_CMDID(cmd)]); |
| 2294 | return -EINVAL; |
| 2295 | } |
| 2296 | |
| 2297 | if (copy_from_user(arg, user, get_arglen[GET_CMDID(cmd)]) != 0) |
| 2298 | return -EFAULT; |
| 2299 | |
Ingo Molnar | 14cc3e2 | 2006-03-26 01:37:14 -0800 | [diff] [blame] | 2300 | if (mutex_lock_interruptible(&__ip_vs_mutex)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2301 | return -ERESTARTSYS; |
| 2302 | |
| 2303 | switch (cmd) { |
| 2304 | case IP_VS_SO_GET_VERSION: |
| 2305 | { |
| 2306 | char buf[64]; |
| 2307 | |
| 2308 | sprintf(buf, "IP Virtual Server version %d.%d.%d (size=%d)", |
| 2309 | NVERSION(IP_VS_VERSION_CODE), IP_VS_CONN_TAB_SIZE); |
| 2310 | if (copy_to_user(user, buf, strlen(buf)+1) != 0) { |
| 2311 | ret = -EFAULT; |
| 2312 | goto out; |
| 2313 | } |
| 2314 | *len = strlen(buf)+1; |
| 2315 | } |
| 2316 | break; |
| 2317 | |
| 2318 | case IP_VS_SO_GET_INFO: |
| 2319 | { |
| 2320 | struct ip_vs_getinfo info; |
| 2321 | info.version = IP_VS_VERSION_CODE; |
| 2322 | info.size = IP_VS_CONN_TAB_SIZE; |
| 2323 | info.num_services = ip_vs_num_services; |
| 2324 | if (copy_to_user(user, &info, sizeof(info)) != 0) |
| 2325 | ret = -EFAULT; |
| 2326 | } |
| 2327 | break; |
| 2328 | |
| 2329 | case IP_VS_SO_GET_SERVICES: |
| 2330 | { |
| 2331 | struct ip_vs_get_services *get; |
| 2332 | int size; |
| 2333 | |
| 2334 | get = (struct ip_vs_get_services *)arg; |
| 2335 | size = sizeof(*get) + |
| 2336 | sizeof(struct ip_vs_service_entry) * get->num_services; |
| 2337 | if (*len != size) { |
| 2338 | IP_VS_ERR("length: %u != %u\n", *len, size); |
| 2339 | ret = -EINVAL; |
| 2340 | goto out; |
| 2341 | } |
| 2342 | ret = __ip_vs_get_service_entries(get, user); |
| 2343 | } |
| 2344 | break; |
| 2345 | |
| 2346 | case IP_VS_SO_GET_SERVICE: |
| 2347 | { |
| 2348 | struct ip_vs_service_entry *entry; |
| 2349 | struct ip_vs_service *svc; |
Julius Volz | b18610d | 2008-09-02 15:55:37 +0200 | [diff] [blame] | 2350 | union nf_inet_addr addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2351 | |
| 2352 | entry = (struct ip_vs_service_entry *)arg; |
Julius Volz | b18610d | 2008-09-02 15:55:37 +0200 | [diff] [blame] | 2353 | addr.ip = entry->addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2354 | if (entry->fwmark) |
Julius Volz | b18610d | 2008-09-02 15:55:37 +0200 | [diff] [blame] | 2355 | svc = __ip_vs_svc_fwm_get(AF_INET, entry->fwmark); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2356 | else |
Julius Volz | b18610d | 2008-09-02 15:55:37 +0200 | [diff] [blame] | 2357 | svc = __ip_vs_service_get(AF_INET, entry->protocol, |
| 2358 | &addr, entry->port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2359 | if (svc) { |
| 2360 | ip_vs_copy_service(entry, svc); |
| 2361 | if (copy_to_user(user, entry, sizeof(*entry)) != 0) |
| 2362 | ret = -EFAULT; |
| 2363 | ip_vs_service_put(svc); |
| 2364 | } else |
| 2365 | ret = -ESRCH; |
| 2366 | } |
| 2367 | break; |
| 2368 | |
| 2369 | case IP_VS_SO_GET_DESTS: |
| 2370 | { |
| 2371 | struct ip_vs_get_dests *get; |
| 2372 | int size; |
| 2373 | |
| 2374 | get = (struct ip_vs_get_dests *)arg; |
| 2375 | size = sizeof(*get) + |
| 2376 | sizeof(struct ip_vs_dest_entry) * get->num_dests; |
| 2377 | if (*len != size) { |
| 2378 | IP_VS_ERR("length: %u != %u\n", *len, size); |
| 2379 | ret = -EINVAL; |
| 2380 | goto out; |
| 2381 | } |
| 2382 | ret = __ip_vs_get_dest_entries(get, user); |
| 2383 | } |
| 2384 | break; |
| 2385 | |
| 2386 | case IP_VS_SO_GET_TIMEOUT: |
| 2387 | { |
| 2388 | struct ip_vs_timeout_user t; |
| 2389 | |
| 2390 | __ip_vs_get_timeouts(&t); |
| 2391 | if (copy_to_user(user, &t, sizeof(t)) != 0) |
| 2392 | ret = -EFAULT; |
| 2393 | } |
| 2394 | break; |
| 2395 | |
| 2396 | case IP_VS_SO_GET_DAEMON: |
| 2397 | { |
| 2398 | struct ip_vs_daemon_user d[2]; |
| 2399 | |
| 2400 | memset(&d, 0, sizeof(d)); |
| 2401 | if (ip_vs_sync_state & IP_VS_STATE_MASTER) { |
| 2402 | d[0].state = IP_VS_STATE_MASTER; |
pageexec | 4da62fc | 2005-06-26 16:00:19 -0700 | [diff] [blame] | 2403 | strlcpy(d[0].mcast_ifn, ip_vs_master_mcast_ifn, sizeof(d[0].mcast_ifn)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2404 | d[0].syncid = ip_vs_master_syncid; |
| 2405 | } |
| 2406 | if (ip_vs_sync_state & IP_VS_STATE_BACKUP) { |
| 2407 | d[1].state = IP_VS_STATE_BACKUP; |
pageexec | 4da62fc | 2005-06-26 16:00:19 -0700 | [diff] [blame] | 2408 | strlcpy(d[1].mcast_ifn, ip_vs_backup_mcast_ifn, sizeof(d[1].mcast_ifn)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2409 | d[1].syncid = ip_vs_backup_syncid; |
| 2410 | } |
| 2411 | if (copy_to_user(user, &d, sizeof(d)) != 0) |
| 2412 | ret = -EFAULT; |
| 2413 | } |
| 2414 | break; |
| 2415 | |
| 2416 | default: |
| 2417 | ret = -EINVAL; |
| 2418 | } |
| 2419 | |
| 2420 | out: |
Ingo Molnar | 14cc3e2 | 2006-03-26 01:37:14 -0800 | [diff] [blame] | 2421 | mutex_unlock(&__ip_vs_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2422 | return ret; |
| 2423 | } |
| 2424 | |
| 2425 | |
| 2426 | static struct nf_sockopt_ops ip_vs_sockopts = { |
| 2427 | .pf = PF_INET, |
| 2428 | .set_optmin = IP_VS_BASE_CTL, |
| 2429 | .set_optmax = IP_VS_SO_SET_MAX+1, |
| 2430 | .set = do_ip_vs_set_ctl, |
| 2431 | .get_optmin = IP_VS_BASE_CTL, |
| 2432 | .get_optmax = IP_VS_SO_GET_MAX+1, |
| 2433 | .get = do_ip_vs_get_ctl, |
Neil Horman | 16fcec3 | 2007-09-11 11:28:26 +0200 | [diff] [blame] | 2434 | .owner = THIS_MODULE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2435 | }; |
| 2436 | |
Julius Volz | 9a81219 | 2008-08-14 14:08:44 +0200 | [diff] [blame] | 2437 | /* |
| 2438 | * Generic Netlink interface |
| 2439 | */ |
| 2440 | |
| 2441 | /* IPVS genetlink family */ |
| 2442 | static struct genl_family ip_vs_genl_family = { |
| 2443 | .id = GENL_ID_GENERATE, |
| 2444 | .hdrsize = 0, |
| 2445 | .name = IPVS_GENL_NAME, |
| 2446 | .version = IPVS_GENL_VERSION, |
| 2447 | .maxattr = IPVS_CMD_MAX, |
| 2448 | }; |
| 2449 | |
| 2450 | /* Policy used for first-level command attributes */ |
| 2451 | static const struct nla_policy ip_vs_cmd_policy[IPVS_CMD_ATTR_MAX + 1] = { |
| 2452 | [IPVS_CMD_ATTR_SERVICE] = { .type = NLA_NESTED }, |
| 2453 | [IPVS_CMD_ATTR_DEST] = { .type = NLA_NESTED }, |
| 2454 | [IPVS_CMD_ATTR_DAEMON] = { .type = NLA_NESTED }, |
| 2455 | [IPVS_CMD_ATTR_TIMEOUT_TCP] = { .type = NLA_U32 }, |
| 2456 | [IPVS_CMD_ATTR_TIMEOUT_TCP_FIN] = { .type = NLA_U32 }, |
| 2457 | [IPVS_CMD_ATTR_TIMEOUT_UDP] = { .type = NLA_U32 }, |
| 2458 | }; |
| 2459 | |
| 2460 | /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DAEMON */ |
| 2461 | static const struct nla_policy ip_vs_daemon_policy[IPVS_DAEMON_ATTR_MAX + 1] = { |
| 2462 | [IPVS_DAEMON_ATTR_STATE] = { .type = NLA_U32 }, |
| 2463 | [IPVS_DAEMON_ATTR_MCAST_IFN] = { .type = NLA_NUL_STRING, |
| 2464 | .len = IP_VS_IFNAME_MAXLEN }, |
| 2465 | [IPVS_DAEMON_ATTR_SYNC_ID] = { .type = NLA_U32 }, |
| 2466 | }; |
| 2467 | |
| 2468 | /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_SERVICE */ |
| 2469 | static const struct nla_policy ip_vs_svc_policy[IPVS_SVC_ATTR_MAX + 1] = { |
| 2470 | [IPVS_SVC_ATTR_AF] = { .type = NLA_U16 }, |
| 2471 | [IPVS_SVC_ATTR_PROTOCOL] = { .type = NLA_U16 }, |
| 2472 | [IPVS_SVC_ATTR_ADDR] = { .type = NLA_BINARY, |
| 2473 | .len = sizeof(union nf_inet_addr) }, |
| 2474 | [IPVS_SVC_ATTR_PORT] = { .type = NLA_U16 }, |
| 2475 | [IPVS_SVC_ATTR_FWMARK] = { .type = NLA_U32 }, |
| 2476 | [IPVS_SVC_ATTR_SCHED_NAME] = { .type = NLA_NUL_STRING, |
| 2477 | .len = IP_VS_SCHEDNAME_MAXLEN }, |
| 2478 | [IPVS_SVC_ATTR_FLAGS] = { .type = NLA_BINARY, |
| 2479 | .len = sizeof(struct ip_vs_flags) }, |
| 2480 | [IPVS_SVC_ATTR_TIMEOUT] = { .type = NLA_U32 }, |
| 2481 | [IPVS_SVC_ATTR_NETMASK] = { .type = NLA_U32 }, |
| 2482 | [IPVS_SVC_ATTR_STATS] = { .type = NLA_NESTED }, |
| 2483 | }; |
| 2484 | |
| 2485 | /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DEST */ |
| 2486 | static const struct nla_policy ip_vs_dest_policy[IPVS_DEST_ATTR_MAX + 1] = { |
| 2487 | [IPVS_DEST_ATTR_ADDR] = { .type = NLA_BINARY, |
| 2488 | .len = sizeof(union nf_inet_addr) }, |
| 2489 | [IPVS_DEST_ATTR_PORT] = { .type = NLA_U16 }, |
| 2490 | [IPVS_DEST_ATTR_FWD_METHOD] = { .type = NLA_U32 }, |
| 2491 | [IPVS_DEST_ATTR_WEIGHT] = { .type = NLA_U32 }, |
| 2492 | [IPVS_DEST_ATTR_U_THRESH] = { .type = NLA_U32 }, |
| 2493 | [IPVS_DEST_ATTR_L_THRESH] = { .type = NLA_U32 }, |
| 2494 | [IPVS_DEST_ATTR_ACTIVE_CONNS] = { .type = NLA_U32 }, |
| 2495 | [IPVS_DEST_ATTR_INACT_CONNS] = { .type = NLA_U32 }, |
| 2496 | [IPVS_DEST_ATTR_PERSIST_CONNS] = { .type = NLA_U32 }, |
| 2497 | [IPVS_DEST_ATTR_STATS] = { .type = NLA_NESTED }, |
| 2498 | }; |
| 2499 | |
| 2500 | static int ip_vs_genl_fill_stats(struct sk_buff *skb, int container_type, |
| 2501 | struct ip_vs_stats *stats) |
| 2502 | { |
| 2503 | struct nlattr *nl_stats = nla_nest_start(skb, container_type); |
| 2504 | if (!nl_stats) |
| 2505 | return -EMSGSIZE; |
| 2506 | |
| 2507 | spin_lock_bh(&stats->lock); |
| 2508 | |
| 2509 | NLA_PUT_U32(skb, IPVS_STATS_ATTR_CONNS, stats->conns); |
| 2510 | NLA_PUT_U32(skb, IPVS_STATS_ATTR_INPKTS, stats->inpkts); |
| 2511 | NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTPKTS, stats->outpkts); |
| 2512 | NLA_PUT_U64(skb, IPVS_STATS_ATTR_INBYTES, stats->inbytes); |
| 2513 | NLA_PUT_U64(skb, IPVS_STATS_ATTR_OUTBYTES, stats->outbytes); |
| 2514 | NLA_PUT_U32(skb, IPVS_STATS_ATTR_CPS, stats->cps); |
| 2515 | NLA_PUT_U32(skb, IPVS_STATS_ATTR_INPPS, stats->inpps); |
| 2516 | NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTPPS, stats->outpps); |
| 2517 | NLA_PUT_U32(skb, IPVS_STATS_ATTR_INBPS, stats->inbps); |
| 2518 | NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTBPS, stats->outbps); |
| 2519 | |
| 2520 | spin_unlock_bh(&stats->lock); |
| 2521 | |
| 2522 | nla_nest_end(skb, nl_stats); |
| 2523 | |
| 2524 | return 0; |
| 2525 | |
| 2526 | nla_put_failure: |
| 2527 | spin_unlock_bh(&stats->lock); |
| 2528 | nla_nest_cancel(skb, nl_stats); |
| 2529 | return -EMSGSIZE; |
| 2530 | } |
| 2531 | |
| 2532 | static int ip_vs_genl_fill_service(struct sk_buff *skb, |
| 2533 | struct ip_vs_service *svc) |
| 2534 | { |
| 2535 | struct nlattr *nl_service; |
| 2536 | struct ip_vs_flags flags = { .flags = svc->flags, |
| 2537 | .mask = ~0 }; |
| 2538 | |
| 2539 | nl_service = nla_nest_start(skb, IPVS_CMD_ATTR_SERVICE); |
| 2540 | if (!nl_service) |
| 2541 | return -EMSGSIZE; |
| 2542 | |
| 2543 | NLA_PUT_U16(skb, IPVS_SVC_ATTR_AF, AF_INET); |
| 2544 | |
| 2545 | if (svc->fwmark) { |
| 2546 | NLA_PUT_U32(skb, IPVS_SVC_ATTR_FWMARK, svc->fwmark); |
| 2547 | } else { |
| 2548 | NLA_PUT_U16(skb, IPVS_SVC_ATTR_PROTOCOL, svc->protocol); |
| 2549 | NLA_PUT(skb, IPVS_SVC_ATTR_ADDR, sizeof(svc->addr), &svc->addr); |
| 2550 | NLA_PUT_U16(skb, IPVS_SVC_ATTR_PORT, svc->port); |
| 2551 | } |
| 2552 | |
| 2553 | NLA_PUT_STRING(skb, IPVS_SVC_ATTR_SCHED_NAME, svc->scheduler->name); |
| 2554 | NLA_PUT(skb, IPVS_SVC_ATTR_FLAGS, sizeof(flags), &flags); |
| 2555 | NLA_PUT_U32(skb, IPVS_SVC_ATTR_TIMEOUT, svc->timeout / HZ); |
| 2556 | NLA_PUT_U32(skb, IPVS_SVC_ATTR_NETMASK, svc->netmask); |
| 2557 | |
| 2558 | if (ip_vs_genl_fill_stats(skb, IPVS_SVC_ATTR_STATS, &svc->stats)) |
| 2559 | goto nla_put_failure; |
| 2560 | |
| 2561 | nla_nest_end(skb, nl_service); |
| 2562 | |
| 2563 | return 0; |
| 2564 | |
| 2565 | nla_put_failure: |
| 2566 | nla_nest_cancel(skb, nl_service); |
| 2567 | return -EMSGSIZE; |
| 2568 | } |
| 2569 | |
| 2570 | static int ip_vs_genl_dump_service(struct sk_buff *skb, |
| 2571 | struct ip_vs_service *svc, |
| 2572 | struct netlink_callback *cb) |
| 2573 | { |
| 2574 | void *hdr; |
| 2575 | |
| 2576 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq, |
| 2577 | &ip_vs_genl_family, NLM_F_MULTI, |
| 2578 | IPVS_CMD_NEW_SERVICE); |
| 2579 | if (!hdr) |
| 2580 | return -EMSGSIZE; |
| 2581 | |
| 2582 | if (ip_vs_genl_fill_service(skb, svc) < 0) |
| 2583 | goto nla_put_failure; |
| 2584 | |
| 2585 | return genlmsg_end(skb, hdr); |
| 2586 | |
| 2587 | nla_put_failure: |
| 2588 | genlmsg_cancel(skb, hdr); |
| 2589 | return -EMSGSIZE; |
| 2590 | } |
| 2591 | |
| 2592 | static int ip_vs_genl_dump_services(struct sk_buff *skb, |
| 2593 | struct netlink_callback *cb) |
| 2594 | { |
| 2595 | int idx = 0, i; |
| 2596 | int start = cb->args[0]; |
| 2597 | struct ip_vs_service *svc; |
| 2598 | |
| 2599 | mutex_lock(&__ip_vs_mutex); |
| 2600 | for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) { |
| 2601 | list_for_each_entry(svc, &ip_vs_svc_table[i], s_list) { |
| 2602 | if (++idx <= start) |
| 2603 | continue; |
| 2604 | if (ip_vs_genl_dump_service(skb, svc, cb) < 0) { |
| 2605 | idx--; |
| 2606 | goto nla_put_failure; |
| 2607 | } |
| 2608 | } |
| 2609 | } |
| 2610 | |
| 2611 | for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) { |
| 2612 | list_for_each_entry(svc, &ip_vs_svc_fwm_table[i], f_list) { |
| 2613 | if (++idx <= start) |
| 2614 | continue; |
| 2615 | if (ip_vs_genl_dump_service(skb, svc, cb) < 0) { |
| 2616 | idx--; |
| 2617 | goto nla_put_failure; |
| 2618 | } |
| 2619 | } |
| 2620 | } |
| 2621 | |
| 2622 | nla_put_failure: |
| 2623 | mutex_unlock(&__ip_vs_mutex); |
| 2624 | cb->args[0] = idx; |
| 2625 | |
| 2626 | return skb->len; |
| 2627 | } |
| 2628 | |
Julius Volz | c860c6b | 2008-09-02 15:55:36 +0200 | [diff] [blame] | 2629 | static int ip_vs_genl_parse_service(struct ip_vs_service_user_kern *usvc, |
Julius Volz | 9a81219 | 2008-08-14 14:08:44 +0200 | [diff] [blame] | 2630 | struct nlattr *nla, int full_entry) |
| 2631 | { |
| 2632 | struct nlattr *attrs[IPVS_SVC_ATTR_MAX + 1]; |
| 2633 | struct nlattr *nla_af, *nla_port, *nla_fwmark, *nla_protocol, *nla_addr; |
| 2634 | |
| 2635 | /* Parse mandatory identifying service fields first */ |
| 2636 | if (nla == NULL || |
| 2637 | nla_parse_nested(attrs, IPVS_SVC_ATTR_MAX, nla, ip_vs_svc_policy)) |
| 2638 | return -EINVAL; |
| 2639 | |
| 2640 | nla_af = attrs[IPVS_SVC_ATTR_AF]; |
| 2641 | nla_protocol = attrs[IPVS_SVC_ATTR_PROTOCOL]; |
| 2642 | nla_addr = attrs[IPVS_SVC_ATTR_ADDR]; |
| 2643 | nla_port = attrs[IPVS_SVC_ATTR_PORT]; |
| 2644 | nla_fwmark = attrs[IPVS_SVC_ATTR_FWMARK]; |
| 2645 | |
| 2646 | if (!(nla_af && (nla_fwmark || (nla_port && nla_protocol && nla_addr)))) |
| 2647 | return -EINVAL; |
| 2648 | |
Julius Volz | c860c6b | 2008-09-02 15:55:36 +0200 | [diff] [blame] | 2649 | usvc->af = nla_get_u16(nla_af); |
Julius Volz | 9a81219 | 2008-08-14 14:08:44 +0200 | [diff] [blame] | 2650 | /* For now, only support IPv4 */ |
| 2651 | if (nla_get_u16(nla_af) != AF_INET) |
| 2652 | return -EAFNOSUPPORT; |
| 2653 | |
| 2654 | if (nla_fwmark) { |
| 2655 | usvc->protocol = IPPROTO_TCP; |
| 2656 | usvc->fwmark = nla_get_u32(nla_fwmark); |
| 2657 | } else { |
| 2658 | usvc->protocol = nla_get_u16(nla_protocol); |
| 2659 | nla_memcpy(&usvc->addr, nla_addr, sizeof(usvc->addr)); |
| 2660 | usvc->port = nla_get_u16(nla_port); |
| 2661 | usvc->fwmark = 0; |
| 2662 | } |
| 2663 | |
| 2664 | /* If a full entry was requested, check for the additional fields */ |
| 2665 | if (full_entry) { |
| 2666 | struct nlattr *nla_sched, *nla_flags, *nla_timeout, |
| 2667 | *nla_netmask; |
| 2668 | struct ip_vs_flags flags; |
| 2669 | struct ip_vs_service *svc; |
| 2670 | |
| 2671 | nla_sched = attrs[IPVS_SVC_ATTR_SCHED_NAME]; |
| 2672 | nla_flags = attrs[IPVS_SVC_ATTR_FLAGS]; |
| 2673 | nla_timeout = attrs[IPVS_SVC_ATTR_TIMEOUT]; |
| 2674 | nla_netmask = attrs[IPVS_SVC_ATTR_NETMASK]; |
| 2675 | |
| 2676 | if (!(nla_sched && nla_flags && nla_timeout && nla_netmask)) |
| 2677 | return -EINVAL; |
| 2678 | |
| 2679 | nla_memcpy(&flags, nla_flags, sizeof(flags)); |
| 2680 | |
| 2681 | /* prefill flags from service if it already exists */ |
| 2682 | if (usvc->fwmark) |
Julius Volz | b18610d | 2008-09-02 15:55:37 +0200 | [diff] [blame] | 2683 | svc = __ip_vs_svc_fwm_get(usvc->af, usvc->fwmark); |
Julius Volz | 9a81219 | 2008-08-14 14:08:44 +0200 | [diff] [blame] | 2684 | else |
Julius Volz | b18610d | 2008-09-02 15:55:37 +0200 | [diff] [blame] | 2685 | svc = __ip_vs_service_get(usvc->af, usvc->protocol, |
| 2686 | &usvc->addr, usvc->port); |
Julius Volz | 9a81219 | 2008-08-14 14:08:44 +0200 | [diff] [blame] | 2687 | if (svc) { |
| 2688 | usvc->flags = svc->flags; |
| 2689 | ip_vs_service_put(svc); |
| 2690 | } else |
| 2691 | usvc->flags = 0; |
| 2692 | |
| 2693 | /* set new flags from userland */ |
| 2694 | usvc->flags = (usvc->flags & ~flags.mask) | |
| 2695 | (flags.flags & flags.mask); |
Julius Volz | c860c6b | 2008-09-02 15:55:36 +0200 | [diff] [blame] | 2696 | usvc->sched_name = nla_data(nla_sched); |
Julius Volz | 9a81219 | 2008-08-14 14:08:44 +0200 | [diff] [blame] | 2697 | usvc->timeout = nla_get_u32(nla_timeout); |
| 2698 | usvc->netmask = nla_get_u32(nla_netmask); |
| 2699 | } |
| 2700 | |
| 2701 | return 0; |
| 2702 | } |
| 2703 | |
| 2704 | static struct ip_vs_service *ip_vs_genl_find_service(struct nlattr *nla) |
| 2705 | { |
Julius Volz | c860c6b | 2008-09-02 15:55:36 +0200 | [diff] [blame] | 2706 | struct ip_vs_service_user_kern usvc; |
Julius Volz | 9a81219 | 2008-08-14 14:08:44 +0200 | [diff] [blame] | 2707 | int ret; |
| 2708 | |
| 2709 | ret = ip_vs_genl_parse_service(&usvc, nla, 0); |
| 2710 | if (ret) |
| 2711 | return ERR_PTR(ret); |
| 2712 | |
| 2713 | if (usvc.fwmark) |
Julius Volz | b18610d | 2008-09-02 15:55:37 +0200 | [diff] [blame] | 2714 | return __ip_vs_svc_fwm_get(usvc.af, usvc.fwmark); |
Julius Volz | 9a81219 | 2008-08-14 14:08:44 +0200 | [diff] [blame] | 2715 | else |
Julius Volz | b18610d | 2008-09-02 15:55:37 +0200 | [diff] [blame] | 2716 | return __ip_vs_service_get(usvc.af, usvc.protocol, |
| 2717 | &usvc.addr, usvc.port); |
Julius Volz | 9a81219 | 2008-08-14 14:08:44 +0200 | [diff] [blame] | 2718 | } |
| 2719 | |
| 2720 | static int ip_vs_genl_fill_dest(struct sk_buff *skb, struct ip_vs_dest *dest) |
| 2721 | { |
| 2722 | struct nlattr *nl_dest; |
| 2723 | |
| 2724 | nl_dest = nla_nest_start(skb, IPVS_CMD_ATTR_DEST); |
| 2725 | if (!nl_dest) |
| 2726 | return -EMSGSIZE; |
| 2727 | |
| 2728 | NLA_PUT(skb, IPVS_DEST_ATTR_ADDR, sizeof(dest->addr), &dest->addr); |
| 2729 | NLA_PUT_U16(skb, IPVS_DEST_ATTR_PORT, dest->port); |
| 2730 | |
| 2731 | NLA_PUT_U32(skb, IPVS_DEST_ATTR_FWD_METHOD, |
| 2732 | atomic_read(&dest->conn_flags) & IP_VS_CONN_F_FWD_MASK); |
| 2733 | NLA_PUT_U32(skb, IPVS_DEST_ATTR_WEIGHT, atomic_read(&dest->weight)); |
| 2734 | NLA_PUT_U32(skb, IPVS_DEST_ATTR_U_THRESH, dest->u_threshold); |
| 2735 | NLA_PUT_U32(skb, IPVS_DEST_ATTR_L_THRESH, dest->l_threshold); |
| 2736 | NLA_PUT_U32(skb, IPVS_DEST_ATTR_ACTIVE_CONNS, |
| 2737 | atomic_read(&dest->activeconns)); |
| 2738 | NLA_PUT_U32(skb, IPVS_DEST_ATTR_INACT_CONNS, |
| 2739 | atomic_read(&dest->inactconns)); |
| 2740 | NLA_PUT_U32(skb, IPVS_DEST_ATTR_PERSIST_CONNS, |
| 2741 | atomic_read(&dest->persistconns)); |
| 2742 | |
| 2743 | if (ip_vs_genl_fill_stats(skb, IPVS_DEST_ATTR_STATS, &dest->stats)) |
| 2744 | goto nla_put_failure; |
| 2745 | |
| 2746 | nla_nest_end(skb, nl_dest); |
| 2747 | |
| 2748 | return 0; |
| 2749 | |
| 2750 | nla_put_failure: |
| 2751 | nla_nest_cancel(skb, nl_dest); |
| 2752 | return -EMSGSIZE; |
| 2753 | } |
| 2754 | |
| 2755 | static int ip_vs_genl_dump_dest(struct sk_buff *skb, struct ip_vs_dest *dest, |
| 2756 | struct netlink_callback *cb) |
| 2757 | { |
| 2758 | void *hdr; |
| 2759 | |
| 2760 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq, |
| 2761 | &ip_vs_genl_family, NLM_F_MULTI, |
| 2762 | IPVS_CMD_NEW_DEST); |
| 2763 | if (!hdr) |
| 2764 | return -EMSGSIZE; |
| 2765 | |
| 2766 | if (ip_vs_genl_fill_dest(skb, dest) < 0) |
| 2767 | goto nla_put_failure; |
| 2768 | |
| 2769 | return genlmsg_end(skb, hdr); |
| 2770 | |
| 2771 | nla_put_failure: |
| 2772 | genlmsg_cancel(skb, hdr); |
| 2773 | return -EMSGSIZE; |
| 2774 | } |
| 2775 | |
| 2776 | static int ip_vs_genl_dump_dests(struct sk_buff *skb, |
| 2777 | struct netlink_callback *cb) |
| 2778 | { |
| 2779 | int idx = 0; |
| 2780 | int start = cb->args[0]; |
| 2781 | struct ip_vs_service *svc; |
| 2782 | struct ip_vs_dest *dest; |
| 2783 | struct nlattr *attrs[IPVS_CMD_ATTR_MAX + 1]; |
| 2784 | |
| 2785 | mutex_lock(&__ip_vs_mutex); |
| 2786 | |
| 2787 | /* Try to find the service for which to dump destinations */ |
| 2788 | if (nlmsg_parse(cb->nlh, GENL_HDRLEN, attrs, |
| 2789 | IPVS_CMD_ATTR_MAX, ip_vs_cmd_policy)) |
| 2790 | goto out_err; |
| 2791 | |
| 2792 | svc = ip_vs_genl_find_service(attrs[IPVS_CMD_ATTR_SERVICE]); |
| 2793 | if (IS_ERR(svc) || svc == NULL) |
| 2794 | goto out_err; |
| 2795 | |
| 2796 | /* Dump the destinations */ |
| 2797 | list_for_each_entry(dest, &svc->destinations, n_list) { |
| 2798 | if (++idx <= start) |
| 2799 | continue; |
| 2800 | if (ip_vs_genl_dump_dest(skb, dest, cb) < 0) { |
| 2801 | idx--; |
| 2802 | goto nla_put_failure; |
| 2803 | } |
| 2804 | } |
| 2805 | |
| 2806 | nla_put_failure: |
| 2807 | cb->args[0] = idx; |
| 2808 | ip_vs_service_put(svc); |
| 2809 | |
| 2810 | out_err: |
| 2811 | mutex_unlock(&__ip_vs_mutex); |
| 2812 | |
| 2813 | return skb->len; |
| 2814 | } |
| 2815 | |
Julius Volz | c860c6b | 2008-09-02 15:55:36 +0200 | [diff] [blame] | 2816 | static int ip_vs_genl_parse_dest(struct ip_vs_dest_user_kern *udest, |
Julius Volz | 9a81219 | 2008-08-14 14:08:44 +0200 | [diff] [blame] | 2817 | struct nlattr *nla, int full_entry) |
| 2818 | { |
| 2819 | struct nlattr *attrs[IPVS_DEST_ATTR_MAX + 1]; |
| 2820 | struct nlattr *nla_addr, *nla_port; |
| 2821 | |
| 2822 | /* Parse mandatory identifying destination fields first */ |
| 2823 | if (nla == NULL || |
| 2824 | nla_parse_nested(attrs, IPVS_DEST_ATTR_MAX, nla, ip_vs_dest_policy)) |
| 2825 | return -EINVAL; |
| 2826 | |
| 2827 | nla_addr = attrs[IPVS_DEST_ATTR_ADDR]; |
| 2828 | nla_port = attrs[IPVS_DEST_ATTR_PORT]; |
| 2829 | |
| 2830 | if (!(nla_addr && nla_port)) |
| 2831 | return -EINVAL; |
| 2832 | |
| 2833 | nla_memcpy(&udest->addr, nla_addr, sizeof(udest->addr)); |
| 2834 | udest->port = nla_get_u16(nla_port); |
| 2835 | |
| 2836 | /* If a full entry was requested, check for the additional fields */ |
| 2837 | if (full_entry) { |
| 2838 | struct nlattr *nla_fwd, *nla_weight, *nla_u_thresh, |
| 2839 | *nla_l_thresh; |
| 2840 | |
| 2841 | nla_fwd = attrs[IPVS_DEST_ATTR_FWD_METHOD]; |
| 2842 | nla_weight = attrs[IPVS_DEST_ATTR_WEIGHT]; |
| 2843 | nla_u_thresh = attrs[IPVS_DEST_ATTR_U_THRESH]; |
| 2844 | nla_l_thresh = attrs[IPVS_DEST_ATTR_L_THRESH]; |
| 2845 | |
| 2846 | if (!(nla_fwd && nla_weight && nla_u_thresh && nla_l_thresh)) |
| 2847 | return -EINVAL; |
| 2848 | |
| 2849 | udest->conn_flags = nla_get_u32(nla_fwd) |
| 2850 | & IP_VS_CONN_F_FWD_MASK; |
| 2851 | udest->weight = nla_get_u32(nla_weight); |
| 2852 | udest->u_threshold = nla_get_u32(nla_u_thresh); |
| 2853 | udest->l_threshold = nla_get_u32(nla_l_thresh); |
| 2854 | } |
| 2855 | |
| 2856 | return 0; |
| 2857 | } |
| 2858 | |
| 2859 | static int ip_vs_genl_fill_daemon(struct sk_buff *skb, __be32 state, |
| 2860 | const char *mcast_ifn, __be32 syncid) |
| 2861 | { |
| 2862 | struct nlattr *nl_daemon; |
| 2863 | |
| 2864 | nl_daemon = nla_nest_start(skb, IPVS_CMD_ATTR_DAEMON); |
| 2865 | if (!nl_daemon) |
| 2866 | return -EMSGSIZE; |
| 2867 | |
| 2868 | NLA_PUT_U32(skb, IPVS_DAEMON_ATTR_STATE, state); |
| 2869 | NLA_PUT_STRING(skb, IPVS_DAEMON_ATTR_MCAST_IFN, mcast_ifn); |
| 2870 | NLA_PUT_U32(skb, IPVS_DAEMON_ATTR_SYNC_ID, syncid); |
| 2871 | |
| 2872 | nla_nest_end(skb, nl_daemon); |
| 2873 | |
| 2874 | return 0; |
| 2875 | |
| 2876 | nla_put_failure: |
| 2877 | nla_nest_cancel(skb, nl_daemon); |
| 2878 | return -EMSGSIZE; |
| 2879 | } |
| 2880 | |
| 2881 | static int ip_vs_genl_dump_daemon(struct sk_buff *skb, __be32 state, |
| 2882 | const char *mcast_ifn, __be32 syncid, |
| 2883 | struct netlink_callback *cb) |
| 2884 | { |
| 2885 | void *hdr; |
| 2886 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq, |
| 2887 | &ip_vs_genl_family, NLM_F_MULTI, |
| 2888 | IPVS_CMD_NEW_DAEMON); |
| 2889 | if (!hdr) |
| 2890 | return -EMSGSIZE; |
| 2891 | |
| 2892 | if (ip_vs_genl_fill_daemon(skb, state, mcast_ifn, syncid)) |
| 2893 | goto nla_put_failure; |
| 2894 | |
| 2895 | return genlmsg_end(skb, hdr); |
| 2896 | |
| 2897 | nla_put_failure: |
| 2898 | genlmsg_cancel(skb, hdr); |
| 2899 | return -EMSGSIZE; |
| 2900 | } |
| 2901 | |
| 2902 | static int ip_vs_genl_dump_daemons(struct sk_buff *skb, |
| 2903 | struct netlink_callback *cb) |
| 2904 | { |
| 2905 | mutex_lock(&__ip_vs_mutex); |
| 2906 | if ((ip_vs_sync_state & IP_VS_STATE_MASTER) && !cb->args[0]) { |
| 2907 | if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_MASTER, |
| 2908 | ip_vs_master_mcast_ifn, |
| 2909 | ip_vs_master_syncid, cb) < 0) |
| 2910 | goto nla_put_failure; |
| 2911 | |
| 2912 | cb->args[0] = 1; |
| 2913 | } |
| 2914 | |
| 2915 | if ((ip_vs_sync_state & IP_VS_STATE_BACKUP) && !cb->args[1]) { |
| 2916 | if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_BACKUP, |
| 2917 | ip_vs_backup_mcast_ifn, |
| 2918 | ip_vs_backup_syncid, cb) < 0) |
| 2919 | goto nla_put_failure; |
| 2920 | |
| 2921 | cb->args[1] = 1; |
| 2922 | } |
| 2923 | |
| 2924 | nla_put_failure: |
| 2925 | mutex_unlock(&__ip_vs_mutex); |
| 2926 | |
| 2927 | return skb->len; |
| 2928 | } |
| 2929 | |
| 2930 | static int ip_vs_genl_new_daemon(struct nlattr **attrs) |
| 2931 | { |
| 2932 | if (!(attrs[IPVS_DAEMON_ATTR_STATE] && |
| 2933 | attrs[IPVS_DAEMON_ATTR_MCAST_IFN] && |
| 2934 | attrs[IPVS_DAEMON_ATTR_SYNC_ID])) |
| 2935 | return -EINVAL; |
| 2936 | |
| 2937 | return start_sync_thread(nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]), |
| 2938 | nla_data(attrs[IPVS_DAEMON_ATTR_MCAST_IFN]), |
| 2939 | nla_get_u32(attrs[IPVS_DAEMON_ATTR_SYNC_ID])); |
| 2940 | } |
| 2941 | |
| 2942 | static int ip_vs_genl_del_daemon(struct nlattr **attrs) |
| 2943 | { |
| 2944 | if (!attrs[IPVS_DAEMON_ATTR_STATE]) |
| 2945 | return -EINVAL; |
| 2946 | |
| 2947 | return stop_sync_thread(nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE])); |
| 2948 | } |
| 2949 | |
| 2950 | static int ip_vs_genl_set_config(struct nlattr **attrs) |
| 2951 | { |
| 2952 | struct ip_vs_timeout_user t; |
| 2953 | |
| 2954 | __ip_vs_get_timeouts(&t); |
| 2955 | |
| 2956 | if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP]) |
| 2957 | t.tcp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP]); |
| 2958 | |
| 2959 | if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN]) |
| 2960 | t.tcp_fin_timeout = |
| 2961 | nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN]); |
| 2962 | |
| 2963 | if (attrs[IPVS_CMD_ATTR_TIMEOUT_UDP]) |
| 2964 | t.udp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_UDP]); |
| 2965 | |
| 2966 | return ip_vs_set_timeout(&t); |
| 2967 | } |
| 2968 | |
| 2969 | static int ip_vs_genl_set_cmd(struct sk_buff *skb, struct genl_info *info) |
| 2970 | { |
| 2971 | struct ip_vs_service *svc = NULL; |
Julius Volz | c860c6b | 2008-09-02 15:55:36 +0200 | [diff] [blame] | 2972 | struct ip_vs_service_user_kern usvc; |
| 2973 | struct ip_vs_dest_user_kern udest; |
Julius Volz | 9a81219 | 2008-08-14 14:08:44 +0200 | [diff] [blame] | 2974 | int ret = 0, cmd; |
| 2975 | int need_full_svc = 0, need_full_dest = 0; |
| 2976 | |
| 2977 | cmd = info->genlhdr->cmd; |
| 2978 | |
| 2979 | mutex_lock(&__ip_vs_mutex); |
| 2980 | |
| 2981 | if (cmd == IPVS_CMD_FLUSH) { |
| 2982 | ret = ip_vs_flush(); |
| 2983 | goto out; |
| 2984 | } else if (cmd == IPVS_CMD_SET_CONFIG) { |
| 2985 | ret = ip_vs_genl_set_config(info->attrs); |
| 2986 | goto out; |
| 2987 | } else if (cmd == IPVS_CMD_NEW_DAEMON || |
| 2988 | cmd == IPVS_CMD_DEL_DAEMON) { |
| 2989 | |
| 2990 | struct nlattr *daemon_attrs[IPVS_DAEMON_ATTR_MAX + 1]; |
| 2991 | |
| 2992 | if (!info->attrs[IPVS_CMD_ATTR_DAEMON] || |
| 2993 | nla_parse_nested(daemon_attrs, IPVS_DAEMON_ATTR_MAX, |
| 2994 | info->attrs[IPVS_CMD_ATTR_DAEMON], |
| 2995 | ip_vs_daemon_policy)) { |
| 2996 | ret = -EINVAL; |
| 2997 | goto out; |
| 2998 | } |
| 2999 | |
| 3000 | if (cmd == IPVS_CMD_NEW_DAEMON) |
| 3001 | ret = ip_vs_genl_new_daemon(daemon_attrs); |
| 3002 | else |
| 3003 | ret = ip_vs_genl_del_daemon(daemon_attrs); |
| 3004 | goto out; |
| 3005 | } else if (cmd == IPVS_CMD_ZERO && |
| 3006 | !info->attrs[IPVS_CMD_ATTR_SERVICE]) { |
| 3007 | ret = ip_vs_zero_all(); |
| 3008 | goto out; |
| 3009 | } |
| 3010 | |
| 3011 | /* All following commands require a service argument, so check if we |
| 3012 | * received a valid one. We need a full service specification when |
| 3013 | * adding / editing a service. Only identifying members otherwise. */ |
| 3014 | if (cmd == IPVS_CMD_NEW_SERVICE || cmd == IPVS_CMD_SET_SERVICE) |
| 3015 | need_full_svc = 1; |
| 3016 | |
| 3017 | ret = ip_vs_genl_parse_service(&usvc, |
| 3018 | info->attrs[IPVS_CMD_ATTR_SERVICE], |
| 3019 | need_full_svc); |
| 3020 | if (ret) |
| 3021 | goto out; |
| 3022 | |
| 3023 | /* Lookup the exact service by <protocol, addr, port> or fwmark */ |
| 3024 | if (usvc.fwmark == 0) |
Julius Volz | b18610d | 2008-09-02 15:55:37 +0200 | [diff] [blame] | 3025 | svc = __ip_vs_service_get(usvc.af, usvc.protocol, |
| 3026 | &usvc.addr, usvc.port); |
Julius Volz | 9a81219 | 2008-08-14 14:08:44 +0200 | [diff] [blame] | 3027 | else |
Julius Volz | b18610d | 2008-09-02 15:55:37 +0200 | [diff] [blame] | 3028 | svc = __ip_vs_svc_fwm_get(usvc.af, usvc.fwmark); |
Julius Volz | 9a81219 | 2008-08-14 14:08:44 +0200 | [diff] [blame] | 3029 | |
| 3030 | /* Unless we're adding a new service, the service must already exist */ |
| 3031 | if ((cmd != IPVS_CMD_NEW_SERVICE) && (svc == NULL)) { |
| 3032 | ret = -ESRCH; |
| 3033 | goto out; |
| 3034 | } |
| 3035 | |
| 3036 | /* Destination commands require a valid destination argument. For |
| 3037 | * adding / editing a destination, we need a full destination |
| 3038 | * specification. */ |
| 3039 | if (cmd == IPVS_CMD_NEW_DEST || cmd == IPVS_CMD_SET_DEST || |
| 3040 | cmd == IPVS_CMD_DEL_DEST) { |
| 3041 | if (cmd != IPVS_CMD_DEL_DEST) |
| 3042 | need_full_dest = 1; |
| 3043 | |
| 3044 | ret = ip_vs_genl_parse_dest(&udest, |
| 3045 | info->attrs[IPVS_CMD_ATTR_DEST], |
| 3046 | need_full_dest); |
| 3047 | if (ret) |
| 3048 | goto out; |
| 3049 | } |
| 3050 | |
| 3051 | switch (cmd) { |
| 3052 | case IPVS_CMD_NEW_SERVICE: |
| 3053 | if (svc == NULL) |
| 3054 | ret = ip_vs_add_service(&usvc, &svc); |
| 3055 | else |
| 3056 | ret = -EEXIST; |
| 3057 | break; |
| 3058 | case IPVS_CMD_SET_SERVICE: |
| 3059 | ret = ip_vs_edit_service(svc, &usvc); |
| 3060 | break; |
| 3061 | case IPVS_CMD_DEL_SERVICE: |
| 3062 | ret = ip_vs_del_service(svc); |
| 3063 | break; |
| 3064 | case IPVS_CMD_NEW_DEST: |
| 3065 | ret = ip_vs_add_dest(svc, &udest); |
| 3066 | break; |
| 3067 | case IPVS_CMD_SET_DEST: |
| 3068 | ret = ip_vs_edit_dest(svc, &udest); |
| 3069 | break; |
| 3070 | case IPVS_CMD_DEL_DEST: |
| 3071 | ret = ip_vs_del_dest(svc, &udest); |
| 3072 | break; |
| 3073 | case IPVS_CMD_ZERO: |
| 3074 | ret = ip_vs_zero_service(svc); |
| 3075 | break; |
| 3076 | default: |
| 3077 | ret = -EINVAL; |
| 3078 | } |
| 3079 | |
| 3080 | out: |
| 3081 | if (svc) |
| 3082 | ip_vs_service_put(svc); |
| 3083 | mutex_unlock(&__ip_vs_mutex); |
| 3084 | |
| 3085 | return ret; |
| 3086 | } |
| 3087 | |
| 3088 | static int ip_vs_genl_get_cmd(struct sk_buff *skb, struct genl_info *info) |
| 3089 | { |
| 3090 | struct sk_buff *msg; |
| 3091 | void *reply; |
| 3092 | int ret, cmd, reply_cmd; |
| 3093 | |
| 3094 | cmd = info->genlhdr->cmd; |
| 3095 | |
| 3096 | if (cmd == IPVS_CMD_GET_SERVICE) |
| 3097 | reply_cmd = IPVS_CMD_NEW_SERVICE; |
| 3098 | else if (cmd == IPVS_CMD_GET_INFO) |
| 3099 | reply_cmd = IPVS_CMD_SET_INFO; |
| 3100 | else if (cmd == IPVS_CMD_GET_CONFIG) |
| 3101 | reply_cmd = IPVS_CMD_SET_CONFIG; |
| 3102 | else { |
| 3103 | IP_VS_ERR("unknown Generic Netlink command\n"); |
| 3104 | return -EINVAL; |
| 3105 | } |
| 3106 | |
| 3107 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
| 3108 | if (!msg) |
| 3109 | return -ENOMEM; |
| 3110 | |
| 3111 | mutex_lock(&__ip_vs_mutex); |
| 3112 | |
| 3113 | reply = genlmsg_put_reply(msg, info, &ip_vs_genl_family, 0, reply_cmd); |
| 3114 | if (reply == NULL) |
| 3115 | goto nla_put_failure; |
| 3116 | |
| 3117 | switch (cmd) { |
| 3118 | case IPVS_CMD_GET_SERVICE: |
| 3119 | { |
| 3120 | struct ip_vs_service *svc; |
| 3121 | |
| 3122 | svc = ip_vs_genl_find_service(info->attrs[IPVS_CMD_ATTR_SERVICE]); |
| 3123 | if (IS_ERR(svc)) { |
| 3124 | ret = PTR_ERR(svc); |
| 3125 | goto out_err; |
| 3126 | } else if (svc) { |
| 3127 | ret = ip_vs_genl_fill_service(msg, svc); |
| 3128 | ip_vs_service_put(svc); |
| 3129 | if (ret) |
| 3130 | goto nla_put_failure; |
| 3131 | } else { |
| 3132 | ret = -ESRCH; |
| 3133 | goto out_err; |
| 3134 | } |
| 3135 | |
| 3136 | break; |
| 3137 | } |
| 3138 | |
| 3139 | case IPVS_CMD_GET_CONFIG: |
| 3140 | { |
| 3141 | struct ip_vs_timeout_user t; |
| 3142 | |
| 3143 | __ip_vs_get_timeouts(&t); |
| 3144 | #ifdef CONFIG_IP_VS_PROTO_TCP |
| 3145 | NLA_PUT_U32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP, t.tcp_timeout); |
| 3146 | NLA_PUT_U32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP_FIN, |
| 3147 | t.tcp_fin_timeout); |
| 3148 | #endif |
| 3149 | #ifdef CONFIG_IP_VS_PROTO_UDP |
| 3150 | NLA_PUT_U32(msg, IPVS_CMD_ATTR_TIMEOUT_UDP, t.udp_timeout); |
| 3151 | #endif |
| 3152 | |
| 3153 | break; |
| 3154 | } |
| 3155 | |
| 3156 | case IPVS_CMD_GET_INFO: |
| 3157 | NLA_PUT_U32(msg, IPVS_INFO_ATTR_VERSION, IP_VS_VERSION_CODE); |
| 3158 | NLA_PUT_U32(msg, IPVS_INFO_ATTR_CONN_TAB_SIZE, |
| 3159 | IP_VS_CONN_TAB_SIZE); |
| 3160 | break; |
| 3161 | } |
| 3162 | |
| 3163 | genlmsg_end(msg, reply); |
| 3164 | ret = genlmsg_unicast(msg, info->snd_pid); |
| 3165 | goto out; |
| 3166 | |
| 3167 | nla_put_failure: |
| 3168 | IP_VS_ERR("not enough space in Netlink message\n"); |
| 3169 | ret = -EMSGSIZE; |
| 3170 | |
| 3171 | out_err: |
| 3172 | nlmsg_free(msg); |
| 3173 | out: |
| 3174 | mutex_unlock(&__ip_vs_mutex); |
| 3175 | |
| 3176 | return ret; |
| 3177 | } |
| 3178 | |
| 3179 | |
| 3180 | static struct genl_ops ip_vs_genl_ops[] __read_mostly = { |
| 3181 | { |
| 3182 | .cmd = IPVS_CMD_NEW_SERVICE, |
| 3183 | .flags = GENL_ADMIN_PERM, |
| 3184 | .policy = ip_vs_cmd_policy, |
| 3185 | .doit = ip_vs_genl_set_cmd, |
| 3186 | }, |
| 3187 | { |
| 3188 | .cmd = IPVS_CMD_SET_SERVICE, |
| 3189 | .flags = GENL_ADMIN_PERM, |
| 3190 | .policy = ip_vs_cmd_policy, |
| 3191 | .doit = ip_vs_genl_set_cmd, |
| 3192 | }, |
| 3193 | { |
| 3194 | .cmd = IPVS_CMD_DEL_SERVICE, |
| 3195 | .flags = GENL_ADMIN_PERM, |
| 3196 | .policy = ip_vs_cmd_policy, |
| 3197 | .doit = ip_vs_genl_set_cmd, |
| 3198 | }, |
| 3199 | { |
| 3200 | .cmd = IPVS_CMD_GET_SERVICE, |
| 3201 | .flags = GENL_ADMIN_PERM, |
| 3202 | .doit = ip_vs_genl_get_cmd, |
| 3203 | .dumpit = ip_vs_genl_dump_services, |
| 3204 | .policy = ip_vs_cmd_policy, |
| 3205 | }, |
| 3206 | { |
| 3207 | .cmd = IPVS_CMD_NEW_DEST, |
| 3208 | .flags = GENL_ADMIN_PERM, |
| 3209 | .policy = ip_vs_cmd_policy, |
| 3210 | .doit = ip_vs_genl_set_cmd, |
| 3211 | }, |
| 3212 | { |
| 3213 | .cmd = IPVS_CMD_SET_DEST, |
| 3214 | .flags = GENL_ADMIN_PERM, |
| 3215 | .policy = ip_vs_cmd_policy, |
| 3216 | .doit = ip_vs_genl_set_cmd, |
| 3217 | }, |
| 3218 | { |
| 3219 | .cmd = IPVS_CMD_DEL_DEST, |
| 3220 | .flags = GENL_ADMIN_PERM, |
| 3221 | .policy = ip_vs_cmd_policy, |
| 3222 | .doit = ip_vs_genl_set_cmd, |
| 3223 | }, |
| 3224 | { |
| 3225 | .cmd = IPVS_CMD_GET_DEST, |
| 3226 | .flags = GENL_ADMIN_PERM, |
| 3227 | .policy = ip_vs_cmd_policy, |
| 3228 | .dumpit = ip_vs_genl_dump_dests, |
| 3229 | }, |
| 3230 | { |
| 3231 | .cmd = IPVS_CMD_NEW_DAEMON, |
| 3232 | .flags = GENL_ADMIN_PERM, |
| 3233 | .policy = ip_vs_cmd_policy, |
| 3234 | .doit = ip_vs_genl_set_cmd, |
| 3235 | }, |
| 3236 | { |
| 3237 | .cmd = IPVS_CMD_DEL_DAEMON, |
| 3238 | .flags = GENL_ADMIN_PERM, |
| 3239 | .policy = ip_vs_cmd_policy, |
| 3240 | .doit = ip_vs_genl_set_cmd, |
| 3241 | }, |
| 3242 | { |
| 3243 | .cmd = IPVS_CMD_GET_DAEMON, |
| 3244 | .flags = GENL_ADMIN_PERM, |
| 3245 | .dumpit = ip_vs_genl_dump_daemons, |
| 3246 | }, |
| 3247 | { |
| 3248 | .cmd = IPVS_CMD_SET_CONFIG, |
| 3249 | .flags = GENL_ADMIN_PERM, |
| 3250 | .policy = ip_vs_cmd_policy, |
| 3251 | .doit = ip_vs_genl_set_cmd, |
| 3252 | }, |
| 3253 | { |
| 3254 | .cmd = IPVS_CMD_GET_CONFIG, |
| 3255 | .flags = GENL_ADMIN_PERM, |
| 3256 | .doit = ip_vs_genl_get_cmd, |
| 3257 | }, |
| 3258 | { |
| 3259 | .cmd = IPVS_CMD_GET_INFO, |
| 3260 | .flags = GENL_ADMIN_PERM, |
| 3261 | .doit = ip_vs_genl_get_cmd, |
| 3262 | }, |
| 3263 | { |
| 3264 | .cmd = IPVS_CMD_ZERO, |
| 3265 | .flags = GENL_ADMIN_PERM, |
| 3266 | .policy = ip_vs_cmd_policy, |
| 3267 | .doit = ip_vs_genl_set_cmd, |
| 3268 | }, |
| 3269 | { |
| 3270 | .cmd = IPVS_CMD_FLUSH, |
| 3271 | .flags = GENL_ADMIN_PERM, |
| 3272 | .doit = ip_vs_genl_set_cmd, |
| 3273 | }, |
| 3274 | }; |
| 3275 | |
| 3276 | static int __init ip_vs_genl_register(void) |
| 3277 | { |
| 3278 | int ret, i; |
| 3279 | |
| 3280 | ret = genl_register_family(&ip_vs_genl_family); |
| 3281 | if (ret) |
| 3282 | return ret; |
| 3283 | |
| 3284 | for (i = 0; i < ARRAY_SIZE(ip_vs_genl_ops); i++) { |
| 3285 | ret = genl_register_ops(&ip_vs_genl_family, &ip_vs_genl_ops[i]); |
| 3286 | if (ret) |
| 3287 | goto err_out; |
| 3288 | } |
| 3289 | return 0; |
| 3290 | |
| 3291 | err_out: |
| 3292 | genl_unregister_family(&ip_vs_genl_family); |
| 3293 | return ret; |
| 3294 | } |
| 3295 | |
| 3296 | static void ip_vs_genl_unregister(void) |
| 3297 | { |
| 3298 | genl_unregister_family(&ip_vs_genl_family); |
| 3299 | } |
| 3300 | |
| 3301 | /* End of Generic Netlink interface definitions */ |
| 3302 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3303 | |
Sven Wegener | 048cf48 | 2008-08-10 18:24:35 +0000 | [diff] [blame] | 3304 | int __init ip_vs_control_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3305 | { |
| 3306 | int ret; |
| 3307 | int idx; |
| 3308 | |
| 3309 | EnterFunction(2); |
| 3310 | |
| 3311 | ret = nf_register_sockopt(&ip_vs_sockopts); |
| 3312 | if (ret) { |
| 3313 | IP_VS_ERR("cannot register sockopt.\n"); |
| 3314 | return ret; |
| 3315 | } |
| 3316 | |
Julius Volz | 9a81219 | 2008-08-14 14:08:44 +0200 | [diff] [blame] | 3317 | ret = ip_vs_genl_register(); |
| 3318 | if (ret) { |
| 3319 | IP_VS_ERR("cannot register Generic Netlink interface.\n"); |
| 3320 | nf_unregister_sockopt(&ip_vs_sockopts); |
| 3321 | return ret; |
| 3322 | } |
| 3323 | |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 3324 | proc_net_fops_create(&init_net, "ip_vs", 0, &ip_vs_info_fops); |
| 3325 | proc_net_fops_create(&init_net, "ip_vs_stats",0, &ip_vs_stats_fops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3326 | |
Pavel Emelyanov | 90754f8 | 2008-01-12 02:33:50 -0800 | [diff] [blame] | 3327 | sysctl_header = register_sysctl_paths(net_vs_ctl_path, vs_vars); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3328 | |
| 3329 | /* Initialize ip_vs_svc_table, ip_vs_svc_fwm_table, ip_vs_rtable */ |
| 3330 | for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { |
| 3331 | INIT_LIST_HEAD(&ip_vs_svc_table[idx]); |
| 3332 | INIT_LIST_HEAD(&ip_vs_svc_fwm_table[idx]); |
| 3333 | } |
| 3334 | for(idx = 0; idx < IP_VS_RTAB_SIZE; idx++) { |
| 3335 | INIT_LIST_HEAD(&ip_vs_rtable[idx]); |
| 3336 | } |
| 3337 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3338 | ip_vs_new_estimator(&ip_vs_stats); |
| 3339 | |
| 3340 | /* Hook the defense timer */ |
| 3341 | schedule_delayed_work(&defense_work, DEFENSE_TIMER_PERIOD); |
| 3342 | |
| 3343 | LeaveFunction(2); |
| 3344 | return 0; |
| 3345 | } |
| 3346 | |
| 3347 | |
| 3348 | void ip_vs_control_cleanup(void) |
| 3349 | { |
| 3350 | EnterFunction(2); |
| 3351 | ip_vs_trash_cleanup(); |
| 3352 | cancel_rearming_delayed_work(&defense_work); |
Oleg Nesterov | 28e53bd | 2007-05-09 02:34:22 -0700 | [diff] [blame] | 3353 | cancel_work_sync(&defense_work.work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3354 | ip_vs_kill_estimator(&ip_vs_stats); |
| 3355 | unregister_sysctl_table(sysctl_header); |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 3356 | proc_net_remove(&init_net, "ip_vs_stats"); |
| 3357 | proc_net_remove(&init_net, "ip_vs"); |
Julius Volz | 9a81219 | 2008-08-14 14:08:44 +0200 | [diff] [blame] | 3358 | ip_vs_genl_unregister(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3359 | nf_unregister_sockopt(&ip_vs_sockopts); |
| 3360 | LeaveFunction(2); |
| 3361 | } |