Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | #include <linux/types.h> |
| 2 | #include <linux/atmmpc.h> |
| 3 | #include <linux/time.h> |
| 4 | |
| 5 | #include "mpoa_caches.h" |
| 6 | #include "mpc.h" |
| 7 | |
| 8 | /* |
| 9 | * mpoa_caches.c: Implementation of ingress and egress cache |
| 10 | * handling functions |
| 11 | */ |
| 12 | |
| 13 | #if 0 |
| 14 | #define dprintk printk /* debug */ |
| 15 | #else |
| 16 | #define dprintk(format,args...) |
| 17 | #endif |
| 18 | |
| 19 | #if 0 |
| 20 | #define ddprintk printk /* more debug */ |
| 21 | #else |
| 22 | #define ddprintk(format,args...) |
| 23 | #endif |
| 24 | |
| 25 | static in_cache_entry *in_cache_get(uint32_t dst_ip, |
| 26 | struct mpoa_client *client) |
| 27 | { |
| 28 | in_cache_entry *entry; |
| 29 | |
| 30 | read_lock_bh(&client->ingress_lock); |
| 31 | entry = client->in_cache; |
| 32 | while(entry != NULL){ |
| 33 | if( entry->ctrl_info.in_dst_ip == dst_ip ){ |
| 34 | atomic_inc(&entry->use); |
| 35 | read_unlock_bh(&client->ingress_lock); |
| 36 | return entry; |
| 37 | } |
| 38 | entry = entry->next; |
| 39 | } |
| 40 | read_unlock_bh(&client->ingress_lock); |
| 41 | |
| 42 | return NULL; |
| 43 | } |
| 44 | |
| 45 | static in_cache_entry *in_cache_get_with_mask(uint32_t dst_ip, |
| 46 | struct mpoa_client *client, |
| 47 | uint32_t mask) |
| 48 | { |
| 49 | in_cache_entry *entry; |
| 50 | |
| 51 | read_lock_bh(&client->ingress_lock); |
| 52 | entry = client->in_cache; |
| 53 | while(entry != NULL){ |
| 54 | if((entry->ctrl_info.in_dst_ip & mask) == (dst_ip & mask )){ |
| 55 | atomic_inc(&entry->use); |
| 56 | read_unlock_bh(&client->ingress_lock); |
| 57 | return entry; |
| 58 | } |
| 59 | entry = entry->next; |
| 60 | } |
| 61 | read_unlock_bh(&client->ingress_lock); |
| 62 | |
| 63 | return NULL; |
| 64 | |
| 65 | } |
| 66 | |
| 67 | static in_cache_entry *in_cache_get_by_vcc(struct atm_vcc *vcc, |
| 68 | struct mpoa_client *client ) |
| 69 | { |
| 70 | in_cache_entry *entry; |
| 71 | |
| 72 | read_lock_bh(&client->ingress_lock); |
| 73 | entry = client->in_cache; |
| 74 | while(entry != NULL){ |
| 75 | if(entry->shortcut == vcc) { |
| 76 | atomic_inc(&entry->use); |
| 77 | read_unlock_bh(&client->ingress_lock); |
| 78 | return entry; |
| 79 | } |
| 80 | entry = entry->next; |
| 81 | } |
| 82 | read_unlock_bh(&client->ingress_lock); |
| 83 | |
| 84 | return NULL; |
| 85 | } |
| 86 | |
| 87 | static in_cache_entry *in_cache_add_entry(uint32_t dst_ip, |
| 88 | struct mpoa_client *client) |
| 89 | { |
| 90 | unsigned char *ip __attribute__ ((unused)) = (unsigned char *)&dst_ip; |
| 91 | in_cache_entry* entry = kmalloc(sizeof(in_cache_entry), GFP_KERNEL); |
| 92 | |
| 93 | if (entry == NULL) { |
| 94 | printk("mpoa: mpoa_caches.c: new_in_cache_entry: out of memory\n"); |
| 95 | return NULL; |
| 96 | } |
| 97 | |
| 98 | dprintk("mpoa: mpoa_caches.c: adding an ingress entry, ip = %u.%u.%u.%u\n", ip[0], ip[1], ip[2], ip[3]); |
| 99 | memset(entry,0,sizeof(in_cache_entry)); |
| 100 | |
| 101 | atomic_set(&entry->use, 1); |
| 102 | dprintk("mpoa: mpoa_caches.c: new_in_cache_entry: about to lock\n"); |
| 103 | write_lock_bh(&client->ingress_lock); |
| 104 | entry->next = client->in_cache; |
| 105 | entry->prev = NULL; |
| 106 | if (client->in_cache != NULL) |
| 107 | client->in_cache->prev = entry; |
| 108 | client->in_cache = entry; |
| 109 | |
| 110 | memcpy(entry->MPS_ctrl_ATM_addr, client->mps_ctrl_addr, ATM_ESA_LEN); |
| 111 | entry->ctrl_info.in_dst_ip = dst_ip; |
| 112 | do_gettimeofday(&(entry->tv)); |
| 113 | entry->retry_time = client->parameters.mpc_p4; |
| 114 | entry->count = 1; |
| 115 | entry->entry_state = INGRESS_INVALID; |
| 116 | entry->ctrl_info.holding_time = HOLDING_TIME_DEFAULT; |
| 117 | atomic_inc(&entry->use); |
| 118 | |
| 119 | write_unlock_bh(&client->ingress_lock); |
| 120 | dprintk("mpoa: mpoa_caches.c: new_in_cache_entry: unlocked\n"); |
| 121 | |
| 122 | return entry; |
| 123 | } |
| 124 | |
| 125 | static int cache_hit(in_cache_entry *entry, struct mpoa_client *mpc) |
| 126 | { |
| 127 | struct atm_mpoa_qos *qos; |
| 128 | struct k_message msg; |
| 129 | |
| 130 | entry->count++; |
| 131 | if(entry->entry_state == INGRESS_RESOLVED && entry->shortcut != NULL) |
| 132 | return OPEN; |
| 133 | |
| 134 | if(entry->entry_state == INGRESS_REFRESHING){ |
| 135 | if(entry->count > mpc->parameters.mpc_p1){ |
| 136 | msg.type = SND_MPOA_RES_RQST; |
| 137 | msg.content.in_info = entry->ctrl_info; |
| 138 | memcpy(msg.MPS_ctrl, mpc->mps_ctrl_addr, ATM_ESA_LEN); |
| 139 | qos = atm_mpoa_search_qos(entry->ctrl_info.in_dst_ip); |
| 140 | if (qos != NULL) msg.qos = qos->qos; |
| 141 | msg_to_mpoad(&msg, mpc); |
| 142 | do_gettimeofday(&(entry->reply_wait)); |
| 143 | entry->entry_state = INGRESS_RESOLVING; |
| 144 | } |
| 145 | if(entry->shortcut != NULL) |
| 146 | return OPEN; |
| 147 | return CLOSED; |
| 148 | } |
| 149 | |
| 150 | if(entry->entry_state == INGRESS_RESOLVING && entry->shortcut != NULL) |
| 151 | return OPEN; |
| 152 | |
| 153 | if( entry->count > mpc->parameters.mpc_p1 && |
| 154 | entry->entry_state == INGRESS_INVALID){ |
| 155 | unsigned char *ip __attribute__ ((unused)) = |
| 156 | (unsigned char *)&entry->ctrl_info.in_dst_ip; |
| 157 | |
| 158 | dprintk("mpoa: (%s) mpoa_caches.c: threshold exceeded for ip %u.%u.%u.%u, sending MPOA res req\n", mpc->dev->name, ip[0], ip[1], ip[2], ip[3]); |
| 159 | entry->entry_state = INGRESS_RESOLVING; |
| 160 | msg.type = SND_MPOA_RES_RQST; |
| 161 | memcpy(msg.MPS_ctrl, mpc->mps_ctrl_addr, ATM_ESA_LEN ); |
| 162 | msg.content.in_info = entry->ctrl_info; |
| 163 | qos = atm_mpoa_search_qos(entry->ctrl_info.in_dst_ip); |
| 164 | if (qos != NULL) msg.qos = qos->qos; |
| 165 | msg_to_mpoad( &msg, mpc); |
| 166 | do_gettimeofday(&(entry->reply_wait)); |
| 167 | } |
| 168 | |
| 169 | return CLOSED; |
| 170 | } |
| 171 | |
| 172 | static void in_cache_put(in_cache_entry *entry) |
| 173 | { |
| 174 | if (atomic_dec_and_test(&entry->use)) { |
| 175 | memset(entry, 0, sizeof(in_cache_entry)); |
| 176 | kfree(entry); |
| 177 | } |
| 178 | |
| 179 | return; |
| 180 | } |
| 181 | |
| 182 | /* |
| 183 | * This should be called with write lock on |
| 184 | */ |
| 185 | static void in_cache_remove_entry(in_cache_entry *entry, |
| 186 | struct mpoa_client *client) |
| 187 | { |
| 188 | struct atm_vcc *vcc; |
| 189 | struct k_message msg; |
| 190 | unsigned char *ip; |
| 191 | |
| 192 | vcc = entry->shortcut; |
| 193 | ip = (unsigned char *)&entry->ctrl_info.in_dst_ip; |
| 194 | dprintk("mpoa: mpoa_caches.c: removing an ingress entry, ip = %u.%u.%u.%u\n",ip[0], ip[1], ip[2], ip[3]); |
| 195 | |
| 196 | if (entry->prev != NULL) |
| 197 | entry->prev->next = entry->next; |
| 198 | else |
| 199 | client->in_cache = entry->next; |
| 200 | if (entry->next != NULL) |
| 201 | entry->next->prev = entry->prev; |
| 202 | client->in_ops->put(entry); |
| 203 | if(client->in_cache == NULL && client->eg_cache == NULL){ |
| 204 | msg.type = STOP_KEEP_ALIVE_SM; |
| 205 | msg_to_mpoad(&msg,client); |
| 206 | } |
| 207 | |
| 208 | /* Check if the egress side still uses this VCC */ |
| 209 | if (vcc != NULL) { |
| 210 | eg_cache_entry *eg_entry = client->eg_ops->get_by_vcc(vcc, client); |
| 211 | if (eg_entry != NULL) { |
| 212 | client->eg_ops->put(eg_entry); |
| 213 | return; |
| 214 | } |
| 215 | vcc_release_async(vcc, -EPIPE); |
| 216 | } |
| 217 | |
| 218 | return; |
| 219 | } |
| 220 | |
| 221 | |
| 222 | /* Call this every MPC-p2 seconds... Not exactly correct solution, |
| 223 | but an easy one... */ |
| 224 | static void clear_count_and_expired(struct mpoa_client *client) |
| 225 | { |
| 226 | unsigned char *ip; |
| 227 | in_cache_entry *entry, *next_entry; |
| 228 | struct timeval now; |
| 229 | |
| 230 | do_gettimeofday(&now); |
| 231 | |
| 232 | write_lock_bh(&client->ingress_lock); |
| 233 | entry = client->in_cache; |
| 234 | while(entry != NULL){ |
| 235 | entry->count=0; |
| 236 | next_entry = entry->next; |
| 237 | if((now.tv_sec - entry->tv.tv_sec) |
| 238 | > entry->ctrl_info.holding_time){ |
| 239 | ip = (unsigned char*)&entry->ctrl_info.in_dst_ip; |
| 240 | dprintk("mpoa: mpoa_caches.c: holding time expired, ip = %u.%u.%u.%u\n", NIPQUAD(ip)); |
| 241 | client->in_ops->remove_entry(entry, client); |
| 242 | } |
| 243 | entry = next_entry; |
| 244 | } |
| 245 | write_unlock_bh(&client->ingress_lock); |
| 246 | |
| 247 | return; |
| 248 | } |
| 249 | |
| 250 | /* Call this every MPC-p4 seconds. */ |
| 251 | static void check_resolving_entries(struct mpoa_client *client) |
| 252 | { |
| 253 | |
| 254 | struct atm_mpoa_qos *qos; |
| 255 | in_cache_entry *entry; |
| 256 | struct timeval now; |
| 257 | struct k_message msg; |
| 258 | |
| 259 | do_gettimeofday( &now ); |
| 260 | |
| 261 | read_lock_bh(&client->ingress_lock); |
| 262 | entry = client->in_cache; |
| 263 | while( entry != NULL ){ |
| 264 | if(entry->entry_state == INGRESS_RESOLVING){ |
| 265 | if(now.tv_sec - entry->hold_down.tv_sec < client->parameters.mpc_p6){ |
| 266 | entry = entry->next; /* Entry in hold down */ |
| 267 | continue; |
| 268 | } |
| 269 | if( (now.tv_sec - entry->reply_wait.tv_sec) > |
| 270 | entry->retry_time ){ |
| 271 | entry->retry_time = MPC_C1*( entry->retry_time ); |
| 272 | if(entry->retry_time > client->parameters.mpc_p5){ |
| 273 | /* Retry time maximum exceeded, put entry in hold down. */ |
| 274 | do_gettimeofday(&(entry->hold_down)); |
| 275 | entry->retry_time = client->parameters.mpc_p4; |
| 276 | entry = entry->next; |
| 277 | continue; |
| 278 | } |
| 279 | /* Ask daemon to send a resolution request. */ |
| 280 | memset(&(entry->hold_down),0,sizeof(struct timeval)); |
| 281 | msg.type = SND_MPOA_RES_RTRY; |
| 282 | memcpy(msg.MPS_ctrl, client->mps_ctrl_addr, ATM_ESA_LEN); |
| 283 | msg.content.in_info = entry->ctrl_info; |
| 284 | qos = atm_mpoa_search_qos(entry->ctrl_info.in_dst_ip); |
| 285 | if (qos != NULL) msg.qos = qos->qos; |
| 286 | msg_to_mpoad(&msg, client); |
| 287 | do_gettimeofday(&(entry->reply_wait)); |
| 288 | } |
| 289 | } |
| 290 | entry = entry->next; |
| 291 | } |
| 292 | read_unlock_bh(&client->ingress_lock); |
| 293 | } |
| 294 | |
| 295 | /* Call this every MPC-p5 seconds. */ |
| 296 | static void refresh_entries(struct mpoa_client *client) |
| 297 | { |
| 298 | struct timeval now; |
| 299 | struct in_cache_entry *entry = client->in_cache; |
| 300 | |
| 301 | ddprintk("mpoa: mpoa_caches.c: refresh_entries\n"); |
| 302 | do_gettimeofday(&now); |
| 303 | |
| 304 | read_lock_bh(&client->ingress_lock); |
| 305 | while( entry != NULL ){ |
| 306 | if( entry->entry_state == INGRESS_RESOLVED ){ |
| 307 | if(!(entry->refresh_time)) |
| 308 | entry->refresh_time = (2*(entry->ctrl_info.holding_time))/3; |
| 309 | if( (now.tv_sec - entry->reply_wait.tv_sec) > entry->refresh_time ){ |
| 310 | dprintk("mpoa: mpoa_caches.c: refreshing an entry.\n"); |
| 311 | entry->entry_state = INGRESS_REFRESHING; |
| 312 | |
| 313 | } |
| 314 | } |
| 315 | entry = entry->next; |
| 316 | } |
| 317 | read_unlock_bh(&client->ingress_lock); |
| 318 | } |
| 319 | |
| 320 | static void in_destroy_cache(struct mpoa_client *mpc) |
| 321 | { |
| 322 | write_lock_irq(&mpc->ingress_lock); |
| 323 | while(mpc->in_cache != NULL) |
| 324 | mpc->in_ops->remove_entry(mpc->in_cache, mpc); |
| 325 | write_unlock_irq(&mpc->ingress_lock); |
| 326 | |
| 327 | return; |
| 328 | } |
| 329 | |
| 330 | static eg_cache_entry *eg_cache_get_by_cache_id(uint32_t cache_id, struct mpoa_client *mpc) |
| 331 | { |
| 332 | eg_cache_entry *entry; |
| 333 | |
| 334 | read_lock_irq(&mpc->egress_lock); |
| 335 | entry = mpc->eg_cache; |
| 336 | while(entry != NULL){ |
| 337 | if(entry->ctrl_info.cache_id == cache_id){ |
| 338 | atomic_inc(&entry->use); |
| 339 | read_unlock_irq(&mpc->egress_lock); |
| 340 | return entry; |
| 341 | } |
| 342 | entry = entry->next; |
| 343 | } |
| 344 | read_unlock_irq(&mpc->egress_lock); |
| 345 | |
| 346 | return NULL; |
| 347 | } |
| 348 | |
| 349 | /* This can be called from any context since it saves CPU flags */ |
| 350 | static eg_cache_entry *eg_cache_get_by_tag(uint32_t tag, struct mpoa_client *mpc) |
| 351 | { |
| 352 | unsigned long flags; |
| 353 | eg_cache_entry *entry; |
| 354 | |
| 355 | read_lock_irqsave(&mpc->egress_lock, flags); |
| 356 | entry = mpc->eg_cache; |
| 357 | while (entry != NULL){ |
| 358 | if (entry->ctrl_info.tag == tag) { |
| 359 | atomic_inc(&entry->use); |
| 360 | read_unlock_irqrestore(&mpc->egress_lock, flags); |
| 361 | return entry; |
| 362 | } |
| 363 | entry = entry->next; |
| 364 | } |
| 365 | read_unlock_irqrestore(&mpc->egress_lock, flags); |
| 366 | |
| 367 | return NULL; |
| 368 | } |
| 369 | |
| 370 | /* This can be called from any context since it saves CPU flags */ |
| 371 | static eg_cache_entry *eg_cache_get_by_vcc(struct atm_vcc *vcc, struct mpoa_client *mpc) |
| 372 | { |
| 373 | unsigned long flags; |
| 374 | eg_cache_entry *entry; |
| 375 | |
| 376 | read_lock_irqsave(&mpc->egress_lock, flags); |
| 377 | entry = mpc->eg_cache; |
| 378 | while (entry != NULL){ |
| 379 | if (entry->shortcut == vcc) { |
| 380 | atomic_inc(&entry->use); |
| 381 | read_unlock_irqrestore(&mpc->egress_lock, flags); |
| 382 | return entry; |
| 383 | } |
| 384 | entry = entry->next; |
| 385 | } |
| 386 | read_unlock_irqrestore(&mpc->egress_lock, flags); |
| 387 | |
| 388 | return NULL; |
| 389 | } |
| 390 | |
| 391 | static eg_cache_entry *eg_cache_get_by_src_ip(uint32_t ipaddr, struct mpoa_client *mpc) |
| 392 | { |
| 393 | eg_cache_entry *entry; |
| 394 | |
| 395 | read_lock_irq(&mpc->egress_lock); |
| 396 | entry = mpc->eg_cache; |
| 397 | while(entry != NULL){ |
| 398 | if(entry->latest_ip_addr == ipaddr) { |
| 399 | atomic_inc(&entry->use); |
| 400 | read_unlock_irq(&mpc->egress_lock); |
| 401 | return entry; |
| 402 | } |
| 403 | entry = entry->next; |
| 404 | } |
| 405 | read_unlock_irq(&mpc->egress_lock); |
| 406 | |
| 407 | return NULL; |
| 408 | } |
| 409 | |
| 410 | static void eg_cache_put(eg_cache_entry *entry) |
| 411 | { |
| 412 | if (atomic_dec_and_test(&entry->use)) { |
| 413 | memset(entry, 0, sizeof(eg_cache_entry)); |
| 414 | kfree(entry); |
| 415 | } |
| 416 | |
| 417 | return; |
| 418 | } |
| 419 | |
| 420 | /* |
| 421 | * This should be called with write lock on |
| 422 | */ |
| 423 | static void eg_cache_remove_entry(eg_cache_entry *entry, |
| 424 | struct mpoa_client *client) |
| 425 | { |
| 426 | struct atm_vcc *vcc; |
| 427 | struct k_message msg; |
| 428 | |
| 429 | vcc = entry->shortcut; |
| 430 | dprintk("mpoa: mpoa_caches.c: removing an egress entry.\n"); |
| 431 | if (entry->prev != NULL) |
| 432 | entry->prev->next = entry->next; |
| 433 | else |
| 434 | client->eg_cache = entry->next; |
| 435 | if (entry->next != NULL) |
| 436 | entry->next->prev = entry->prev; |
| 437 | client->eg_ops->put(entry); |
| 438 | if(client->in_cache == NULL && client->eg_cache == NULL){ |
| 439 | msg.type = STOP_KEEP_ALIVE_SM; |
| 440 | msg_to_mpoad(&msg,client); |
| 441 | } |
| 442 | |
| 443 | /* Check if the ingress side still uses this VCC */ |
| 444 | if (vcc != NULL) { |
| 445 | in_cache_entry *in_entry = client->in_ops->get_by_vcc(vcc, client); |
| 446 | if (in_entry != NULL) { |
| 447 | client->in_ops->put(in_entry); |
| 448 | return; |
| 449 | } |
| 450 | vcc_release_async(vcc, -EPIPE); |
| 451 | } |
| 452 | |
| 453 | return; |
| 454 | } |
| 455 | |
| 456 | static eg_cache_entry *eg_cache_add_entry(struct k_message *msg, struct mpoa_client *client) |
| 457 | { |
| 458 | unsigned char *ip; |
| 459 | eg_cache_entry *entry = kmalloc(sizeof(eg_cache_entry), GFP_KERNEL); |
| 460 | |
| 461 | if (entry == NULL) { |
| 462 | printk("mpoa: mpoa_caches.c: new_eg_cache_entry: out of memory\n"); |
| 463 | return NULL; |
| 464 | } |
| 465 | |
| 466 | ip = (unsigned char *)&msg->content.eg_info.eg_dst_ip; |
| 467 | dprintk("mpoa: mpoa_caches.c: adding an egress entry, ip = %u.%u.%u.%u, this should be our IP\n", NIPQUAD(ip)); |
| 468 | memset(entry, 0, sizeof(eg_cache_entry)); |
| 469 | |
| 470 | atomic_set(&entry->use, 1); |
| 471 | dprintk("mpoa: mpoa_caches.c: new_eg_cache_entry: about to lock\n"); |
| 472 | write_lock_irq(&client->egress_lock); |
| 473 | entry->next = client->eg_cache; |
| 474 | entry->prev = NULL; |
| 475 | if (client->eg_cache != NULL) |
| 476 | client->eg_cache->prev = entry; |
| 477 | client->eg_cache = entry; |
| 478 | |
| 479 | memcpy(entry->MPS_ctrl_ATM_addr, client->mps_ctrl_addr, ATM_ESA_LEN); |
| 480 | entry->ctrl_info = msg->content.eg_info; |
| 481 | do_gettimeofday(&(entry->tv)); |
| 482 | entry->entry_state = EGRESS_RESOLVED; |
| 483 | dprintk("mpoa: mpoa_caches.c: new_eg_cache_entry cache_id %lu\n", ntohl(entry->ctrl_info.cache_id)); |
| 484 | ip = (unsigned char *)&entry->ctrl_info.mps_ip; |
| 485 | dprintk("mpoa: mpoa_caches.c: mps_ip = %u.%u.%u.%u\n", NIPQUAD(ip)); |
| 486 | atomic_inc(&entry->use); |
| 487 | |
| 488 | write_unlock_irq(&client->egress_lock); |
| 489 | dprintk("mpoa: mpoa_caches.c: new_eg_cache_entry: unlocked\n"); |
| 490 | |
| 491 | return entry; |
| 492 | } |
| 493 | |
| 494 | static void update_eg_cache_entry(eg_cache_entry * entry, uint16_t holding_time) |
| 495 | { |
| 496 | do_gettimeofday(&(entry->tv)); |
| 497 | entry->entry_state = EGRESS_RESOLVED; |
| 498 | entry->ctrl_info.holding_time = holding_time; |
| 499 | |
| 500 | return; |
| 501 | } |
| 502 | |
| 503 | static void clear_expired(struct mpoa_client *client) |
| 504 | { |
| 505 | eg_cache_entry *entry, *next_entry; |
| 506 | struct timeval now; |
| 507 | struct k_message msg; |
| 508 | |
| 509 | do_gettimeofday(&now); |
| 510 | |
| 511 | write_lock_irq(&client->egress_lock); |
| 512 | entry = client->eg_cache; |
| 513 | while(entry != NULL){ |
| 514 | next_entry = entry->next; |
| 515 | if((now.tv_sec - entry->tv.tv_sec) |
| 516 | > entry->ctrl_info.holding_time){ |
| 517 | msg.type = SND_EGRESS_PURGE; |
| 518 | msg.content.eg_info = entry->ctrl_info; |
| 519 | dprintk("mpoa: mpoa_caches.c: egress_cache: holding time expired, cache_id = %lu.\n",ntohl(entry->ctrl_info.cache_id)); |
| 520 | msg_to_mpoad(&msg, client); |
| 521 | client->eg_ops->remove_entry(entry, client); |
| 522 | } |
| 523 | entry = next_entry; |
| 524 | } |
| 525 | write_unlock_irq(&client->egress_lock); |
| 526 | |
| 527 | return; |
| 528 | } |
| 529 | |
| 530 | static void eg_destroy_cache(struct mpoa_client *mpc) |
| 531 | { |
| 532 | write_lock_irq(&mpc->egress_lock); |
| 533 | while(mpc->eg_cache != NULL) |
| 534 | mpc->eg_ops->remove_entry(mpc->eg_cache, mpc); |
| 535 | write_unlock_irq(&mpc->egress_lock); |
| 536 | |
| 537 | return; |
| 538 | } |
| 539 | |
| 540 | |
| 541 | |
| 542 | static struct in_cache_ops ingress_ops = { |
| 543 | in_cache_add_entry, /* add_entry */ |
| 544 | in_cache_get, /* get */ |
| 545 | in_cache_get_with_mask, /* get_with_mask */ |
| 546 | in_cache_get_by_vcc, /* get_by_vcc */ |
| 547 | in_cache_put, /* put */ |
| 548 | in_cache_remove_entry, /* remove_entry */ |
| 549 | cache_hit, /* cache_hit */ |
| 550 | clear_count_and_expired, /* clear_count */ |
| 551 | check_resolving_entries, /* check_resolving */ |
| 552 | refresh_entries, /* refresh */ |
| 553 | in_destroy_cache /* destroy_cache */ |
| 554 | }; |
| 555 | |
| 556 | static struct eg_cache_ops egress_ops = { |
| 557 | eg_cache_add_entry, /* add_entry */ |
| 558 | eg_cache_get_by_cache_id, /* get_by_cache_id */ |
| 559 | eg_cache_get_by_tag, /* get_by_tag */ |
| 560 | eg_cache_get_by_vcc, /* get_by_vcc */ |
| 561 | eg_cache_get_by_src_ip, /* get_by_src_ip */ |
| 562 | eg_cache_put, /* put */ |
| 563 | eg_cache_remove_entry, /* remove_entry */ |
| 564 | update_eg_cache_entry, /* update */ |
| 565 | clear_expired, /* clear_expired */ |
| 566 | eg_destroy_cache /* destroy_cache */ |
| 567 | }; |
| 568 | |
| 569 | |
| 570 | void atm_mpoa_init_cache(struct mpoa_client *mpc) |
| 571 | { |
| 572 | mpc->in_ops = &ingress_ops; |
| 573 | mpc->eg_ops = &egress_ops; |
| 574 | |
| 575 | return; |
| 576 | } |