1#include <linux/kernel.h> 2#include <linux/string.h> 3#include <linux/timer.h> 4#include <linux/init.h> 5#include <linux/bitops.h> 6#include <linux/capability.h> 7#include <linux/seq_file.h> 8 9/* We are an ethernet device */ 10#include <linux/if_ether.h> 11#include <linux/netdevice.h> 12#include <linux/etherdevice.h> 13#include <net/sock.h> 14#include <linux/skbuff.h> 15#include <linux/ip.h> 16#include <asm/byteorder.h> 17#include <asm/uaccess.h> 18#include <net/checksum.h> /* for ip_fast_csum() */ 19#include <net/arp.h> 20#include <net/dst.h> 21#include <linux/proc_fs.h> 22 23/* And atm device */ 24#include <linux/atmdev.h> 25#include <linux/atmlec.h> 26#include <linux/atmmpc.h> 27/* Modular too */ 28#include <linux/module.h> 29 30#include "lec.h" 31#include "mpc.h" 32#include "resources.h" 33 34/* 35 * mpc.c: Implementation of MPOA client kernel part 36 */ 37 38#define dprintk(format,args...) 39 40#define ddprintk(format,args...) 41 42 43 44#define MPOA_TAG_LEN 4 45 46/* mpc_daemon -> kernel */ 47static void MPOA_trigger_rcvd (struct k_message *msg, struct mpoa_client *mpc); 48static void MPOA_res_reply_rcvd(struct k_message *msg, struct mpoa_client *mpc); 49static void ingress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc); 50static void egress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc); 51static void mps_death(struct k_message *msg, struct mpoa_client *mpc); 52static void clean_up(struct k_message *msg, struct mpoa_client *mpc, int action); 53static void MPOA_cache_impos_rcvd(struct k_message *msg, struct mpoa_client *mpc); 54static void set_mpc_ctrl_addr_rcvd(struct k_message *mesg, struct mpoa_client *mpc); 55static void set_mps_mac_addr_rcvd(struct k_message *mesg, struct mpoa_client *mpc); 56 57static uint8_t *copy_macs(struct mpoa_client *mpc, uint8_t *router_mac, 58 uint8_t *tlvs, uint8_t mps_macs, uint8_t device_type); 59static void purge_egress_shortcut(struct atm_vcc *vcc, eg_cache_entry *entry); 60 61static void send_set_mps_ctrl_addr(char *addr, struct mpoa_client *mpc); 62static void mpoad_close(struct atm_vcc *vcc); 63static int msg_from_mpoad(struct atm_vcc *vcc, struct sk_buff *skb); 64 65static void mpc_push(struct atm_vcc *vcc, struct sk_buff *skb); 66static int mpc_send_packet(struct sk_buff *skb, struct net_device *dev); 67static int mpoa_event_listener(struct notifier_block *mpoa_notifier, unsigned long event, void *dev); 68static void mpc_timer_refresh(void); 69static void mpc_cache_check( unsigned long checking_time ); 70 71static struct llc_snap_hdr llc_snap_mpoa_ctrl = { 72 0xaa, 0xaa, 0x03, 73 {0x00, 0x00, 0x5e}, 74 {0x00, 0x03} /* For MPOA control PDUs */ 75}; 76static struct llc_snap_hdr llc_snap_mpoa_data = { 77 0xaa, 0xaa, 0x03, 78 {0x00, 0x00, 0x00}, 79 {0x08, 0x00} /* This is for IP PDUs only */ 80}; 81static struct llc_snap_hdr llc_snap_mpoa_data_tagged = { 82 0xaa, 0xaa, 0x03, 83 {0x00, 0x00, 0x00}, 84 {0x88, 0x4c} /* This is for tagged data PDUs */ 85}; 86 87static struct notifier_block mpoa_notifier = { 88 mpoa_event_listener, 89 NULL, 90 0 91}; 92 93struct mpoa_client *mpcs = NULL; 94static struct atm_mpoa_qos *qos_head = NULL; 95static DEFINE_TIMER(mpc_timer, NULL, 0, 0); 96 97 98static struct mpoa_client *find_mpc_by_itfnum(int itf) 99{ 100 struct mpoa_client *mpc; 101 102 mpc = mpcs; /* our global linked list */ 103 while (mpc != NULL) { 104 if (mpc->dev_num == itf) 105 return mpc; 106 mpc = mpc->next; 107 } 108 109 return NULL; /* not found */ 110} 111 112static struct mpoa_client *find_mpc_by_vcc(struct atm_vcc *vcc) 113{ 114 struct mpoa_client *mpc; 115 116 mpc = mpcs; /* our global linked list */ 117 while (mpc != NULL) { 118 if (mpc->mpoad_vcc == vcc) 119 return mpc; 120 mpc = mpc->next; 121 } 122 123 return NULL; /* not found */ 124} 125 126static struct mpoa_client *find_mpc_by_lec(struct net_device *dev) 127{ 128 struct mpoa_client *mpc; 129 130 mpc = mpcs; /* our global linked list */ 131 while (mpc != NULL) { 132 if (mpc->dev == dev) 133 return mpc; 134 mpc = mpc->next; 135 } 136 137 return NULL; /* not found */ 138} 139 140/* 141 * Functions for managing QoS list 142 */ 143 144/* 145 * Overwrites the old entry or makes a new one. 146 */ 147struct atm_mpoa_qos *atm_mpoa_add_qos(__be32 dst_ip, struct atm_qos *qos) 148{ 149 struct atm_mpoa_qos *entry; 150 151 entry = atm_mpoa_search_qos(dst_ip); 152 if (entry != NULL) { 153 entry->qos = *qos; 154 return entry; 155 } 156 157 entry = kmalloc(sizeof(struct atm_mpoa_qos), GFP_KERNEL); 158 if (entry == NULL) { 159 printk("mpoa: atm_mpoa_add_qos: out of memory\n"); 160 return entry; 161 } 162 163 entry->ipaddr = dst_ip; 164 entry->qos = *qos; 165 166 entry->next = qos_head; 167 qos_head = entry; 168 169 return entry; 170} 171 172struct atm_mpoa_qos *atm_mpoa_search_qos(__be32 dst_ip) 173{ 174 struct atm_mpoa_qos *qos; 175 176 qos = qos_head; 177 while( qos != NULL ){ 178 if(qos->ipaddr == dst_ip) { 179 break; 180 } 181 qos = qos->next; 182 } 183 184 return qos; 185} 186 187/* 188 * Returns 0 for failure 189 */ 190int atm_mpoa_delete_qos(struct atm_mpoa_qos *entry) 191{ 192 193 struct atm_mpoa_qos *curr; 194 195 if (entry == NULL) return 0; 196 if (entry == qos_head) { 197 qos_head = qos_head->next; 198 kfree(entry); 199 return 1; 200 } 201 202 curr = qos_head; 203 while (curr != NULL) { 204 if (curr->next == entry) { 205 curr->next = entry->next; 206 kfree(entry); 207 return 1; 208 } 209 curr = curr->next; 210 } 211 212 return 0; 213} 214 215/* this is buggered - we need locking for qos_head */ 216void atm_mpoa_disp_qos(struct seq_file *m) 217{ 218 struct atm_mpoa_qos *qos; 219 220 qos = qos_head; 221 seq_printf(m, "QoS entries for shortcuts:\n"); 222 seq_printf(m, "IP address\n TX:max_pcr pcr min_pcr max_cdv max_sdu\n RX:max_pcr pcr min_pcr max_cdv max_sdu\n"); 223 224 while (qos != NULL) { 225 seq_printf(m, "%u.%u.%u.%u\n %-7d %-7d %-7d %-7d %-7d\n %-7d %-7d %-7d %-7d %-7d\n", 226 NIPQUAD(qos->ipaddr), 227 qos->qos.txtp.max_pcr, qos->qos.txtp.pcr, qos->qos.txtp.min_pcr, qos->qos.txtp.max_cdv, qos->qos.txtp.max_sdu, 228 qos->qos.rxtp.max_pcr, qos->qos.rxtp.pcr, qos->qos.rxtp.min_pcr, qos->qos.rxtp.max_cdv, qos->qos.rxtp.max_sdu); 229 qos = qos->next; 230 } 231} 232 233static struct net_device *find_lec_by_itfnum(int itf) 234{ 235 struct net_device *dev; 236 char name[IFNAMSIZ]; 237 238 sprintf(name, "lec%d", itf); 239 dev = dev_get_by_name(name); 240 241 return dev; 242} 243 244static struct mpoa_client *alloc_mpc(void) 245{ 246 struct mpoa_client *mpc; 247 248 mpc = kzalloc(sizeof (struct mpoa_client), GFP_KERNEL); 249 if (mpc == NULL) 250 return NULL; 251 rwlock_init(&mpc->ingress_lock); 252 rwlock_init(&mpc->egress_lock); 253 mpc->next = mpcs; 254 atm_mpoa_init_cache(mpc); 255 256 mpc->parameters.mpc_p1 = MPC_P1; 257 mpc->parameters.mpc_p2 = MPC_P2; 258 memset(mpc->parameters.mpc_p3,0,sizeof(mpc->parameters.mpc_p3)); 259 mpc->parameters.mpc_p4 = MPC_P4; 260 mpc->parameters.mpc_p5 = MPC_P5; 261 mpc->parameters.mpc_p6 = MPC_P6; 262 263 mpcs = mpc; 264 265 return mpc; 266} 267 268/* 269 * 270 * start_mpc() puts the MPC on line. All the packets destined 271 * to the lec underneath us are now being monitored and 272 * shortcuts will be established. 273 * 274 */ 275static void start_mpc(struct mpoa_client *mpc, struct net_device *dev) 276{ 277 278 dprintk("mpoa: (%s) start_mpc:\n", mpc->dev->name); 279 if (dev->hard_start_xmit == NULL) { 280 printk("mpoa: (%s) start_mpc: dev->hard_start_xmit == NULL, not starting\n", 281 dev->name); 282 return; 283 } 284 mpc->old_hard_start_xmit = dev->hard_start_xmit; 285 dev->hard_start_xmit = mpc_send_packet; 286 287 return; 288} 289 290static void stop_mpc(struct mpoa_client *mpc) 291{ 292 293 dprintk("mpoa: (%s) stop_mpc:", mpc->dev->name); 294 295 /* Lets not nullify lec device's dev->hard_start_xmit */ 296 if (mpc->dev->hard_start_xmit != mpc_send_packet) { 297 dprintk(" mpc already stopped, not fatal\n"); 298 return; 299 } 300 dprintk("\n"); 301 mpc->dev->hard_start_xmit = mpc->old_hard_start_xmit; 302 mpc->old_hard_start_xmit = NULL; 303 304 return; 305} 306 307static const char *mpoa_device_type_string(char type) __attribute__ ((unused)); 308 309static const char *mpoa_device_type_string(char type) 310{ 311 switch(type) { 312 case NON_MPOA: 313 return "non-MPOA device"; 314 break; 315 case MPS: 316 return "MPS"; 317 break; 318 case MPC: 319 return "MPC"; 320 break; 321 case MPS_AND_MPC: 322 return "both MPS and MPC"; 323 break; 324 default: 325 return "unspecified (non-MPOA) device"; 326 break; 327 } 328 329 return ""; /* not reached */ 330} 331 332/* 333 * lec device calls this via its dev->priv->lane2_ops->associate_indicator() 334 * when it sees a TLV in LE_ARP packet. 335 * We fill in the pointer above when we see a LANE2 lec initializing 336 * See LANE2 spec 3.1.5 337 * 338 * Quite a big and ugly function but when you look at it 339 * all it does is to try to locate and parse MPOA Device 340 * Type TLV. 341 * We give our lec a pointer to this function and when the 342 * lec sees a TLV it uses the pointer to call this function. 343 * 344 */ 345static void lane2_assoc_ind(struct net_device *dev, uint8_t *mac_addr, 346 uint8_t *tlvs, uint32_t sizeoftlvs) 347{ 348 uint32_t type; 349 uint8_t length, mpoa_device_type, number_of_mps_macs; 350 uint8_t *end_of_tlvs; 351 struct mpoa_client *mpc; 352 353 mpoa_device_type = number_of_mps_macs = 0; /* silence gcc */ 354 dprintk("mpoa: (%s) lane2_assoc_ind: received TLV(s), ", dev->name); 355 dprintk("total length of all TLVs %d\n", sizeoftlvs); 356 mpc = find_mpc_by_lec(dev); /* Sampo-Fix: moved here from below */ 357 if (mpc == NULL) { 358 printk("mpoa: (%s) lane2_assoc_ind: no mpc\n", dev->name); 359 return; 360 } 361 end_of_tlvs = tlvs + sizeoftlvs; 362 while (end_of_tlvs - tlvs >= 5) { 363 type = (tlvs[0] << 24) | (tlvs[1] << 16) | (tlvs[2] << 8) | tlvs[3]; 364 length = tlvs[4]; 365 tlvs += 5; 366 dprintk(" type 0x%x length %02x\n", type, length); 367 if (tlvs + length > end_of_tlvs) { 368 printk("TLV value extends past its buffer, aborting parse\n"); 369 return; 370 } 371 372 if (type == 0) { 373 printk("mpoa: (%s) lane2_assoc_ind: TLV type was 0, returning\n", dev->name); 374 return; 375 } 376 377 if (type != TLV_MPOA_DEVICE_TYPE) { 378 tlvs += length; 379 continue; /* skip other TLVs */ 380 } 381 mpoa_device_type = *tlvs++; 382 number_of_mps_macs = *tlvs++; 383 dprintk("mpoa: (%s) MPOA device type '%s', ", dev->name, mpoa_device_type_string(mpoa_device_type)); 384 if (mpoa_device_type == MPS_AND_MPC && 385 length < (42 + number_of_mps_macs*ETH_ALEN)) { /* :) */ 386 printk("\nmpoa: (%s) lane2_assoc_ind: short MPOA Device Type TLV\n", 387 dev->name); 388 continue; 389 } 390 if ((mpoa_device_type == MPS || mpoa_device_type == MPC) 391 && length < 22 + number_of_mps_macs*ETH_ALEN) { 392 printk("\nmpoa: (%s) lane2_assoc_ind: short MPOA Device Type TLV\n", 393 dev->name); 394 continue; 395 } 396 if (mpoa_device_type != MPS && mpoa_device_type != MPS_AND_MPC) { 397 dprintk("ignoring non-MPS device\n"); 398 if (mpoa_device_type == MPC) tlvs += 20; 399 continue; /* we are only interested in MPSs */ 400 } 401 if (number_of_mps_macs == 0 && mpoa_device_type == MPS_AND_MPC) { 402 printk("\nmpoa: (%s) lane2_assoc_ind: MPS_AND_MPC has zero MACs\n", dev->name); 403 continue; /* someone should read the spec */ 404 } 405 dprintk("this MPS has %d MAC addresses\n", number_of_mps_macs); 406 407 /* ok, now we can go and tell our daemon the control address of MPS */ 408 send_set_mps_ctrl_addr(tlvs, mpc); 409 410 tlvs = copy_macs(mpc, mac_addr, tlvs, number_of_mps_macs, mpoa_device_type); 411 if (tlvs == NULL) return; 412 } 413 if (end_of_tlvs - tlvs != 0) 414 printk("mpoa: (%s) lane2_assoc_ind: ignoring %Zd bytes of trailing TLV carbage\n", 415 dev->name, end_of_tlvs - tlvs); 416 return; 417} 418 419/* 420 * Store at least advertizing router's MAC address 421 * plus the possible MAC address(es) to mpc->mps_macs. 422 * For a freshly allocated MPOA client mpc->mps_macs == 0. 423 */ 424static uint8_t *copy_macs(struct mpoa_client *mpc, uint8_t *router_mac, 425 uint8_t *tlvs, uint8_t mps_macs, uint8_t device_type) 426{ 427 int num_macs; 428 num_macs = (mps_macs > 1) ? mps_macs : 1; 429 430 if (mpc->number_of_mps_macs != num_macs) { /* need to reallocate? */ 431 if (mpc->number_of_mps_macs != 0) kfree(mpc->mps_macs); 432 mpc->number_of_mps_macs = 0; 433 mpc->mps_macs = kmalloc(num_macs*ETH_ALEN, GFP_KERNEL); 434 if (mpc->mps_macs == NULL) { 435 printk("mpoa: (%s) copy_macs: out of mem\n", mpc->dev->name); 436 return NULL; 437 } 438 } 439 memcpy(mpc->mps_macs, router_mac, ETH_ALEN); 440 tlvs += 20; if (device_type == MPS_AND_MPC) tlvs += 20; 441 if (mps_macs > 0) 442 memcpy(mpc->mps_macs, tlvs, mps_macs*ETH_ALEN); 443 tlvs += mps_macs*ETH_ALEN; 444 mpc->number_of_mps_macs = num_macs; 445 446 return tlvs; 447} 448 449static int send_via_shortcut(struct sk_buff *skb, struct mpoa_client *mpc) 450{ 451 in_cache_entry *entry; 452 struct iphdr *iph; 453 char *buff; 454 __be32 ipaddr = 0; 455 456 static struct { 457 struct llc_snap_hdr hdr; 458 __be32 tag; 459 } tagged_llc_snap_hdr = { 460 {0xaa, 0xaa, 0x03, {0x00, 0x00, 0x00}, {0x88, 0x4c}}, 461 0 462 }; 463 464 buff = skb->data + mpc->dev->hard_header_len; 465 iph = (struct iphdr *)buff; 466 ipaddr = iph->daddr; 467 468 ddprintk("mpoa: (%s) send_via_shortcut: ipaddr 0x%x\n", mpc->dev->name, ipaddr); 469 470 entry = mpc->in_ops->get(ipaddr, mpc); 471 if (entry == NULL) { 472 entry = mpc->in_ops->add_entry(ipaddr, mpc); 473 if (entry != NULL) mpc->in_ops->put(entry); 474 return 1; 475 } 476 if (mpc->in_ops->cache_hit(entry, mpc) != OPEN){ /* threshold not exceeded or VCC not ready */ 477 ddprintk("mpoa: (%s) send_via_shortcut: cache_hit: returns != OPEN\n", mpc->dev->name); 478 mpc->in_ops->put(entry); 479 return 1; 480 } 481 482 ddprintk("mpoa: (%s) send_via_shortcut: using shortcut\n", mpc->dev->name); 483 /* MPOA spec A.1.4, MPOA client must decrement IP ttl at least by one */ 484 if (iph->ttl <= 1) { 485 ddprintk("mpoa: (%s) send_via_shortcut: IP ttl = %u, using LANE\n", mpc->dev->name, iph->ttl); 486 mpc->in_ops->put(entry); 487 return 1; 488 } 489 iph->ttl--; 490 iph->check = 0; 491 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl); 492 493 if (entry->ctrl_info.tag != 0) { 494 ddprintk("mpoa: (%s) send_via_shortcut: adding tag 0x%x\n", mpc->dev->name, entry->ctrl_info.tag); 495 tagged_llc_snap_hdr.tag = entry->ctrl_info.tag; 496 skb_pull(skb, ETH_HLEN); /* get rid of Eth header */ 497 skb_push(skb, sizeof(tagged_llc_snap_hdr)); /* add LLC/SNAP header */ 498 skb_copy_to_linear_data(skb, &tagged_llc_snap_hdr, 499 sizeof(tagged_llc_snap_hdr)); 500 } else { 501 skb_pull(skb, ETH_HLEN); /* get rid of Eth header */ 502 skb_push(skb, sizeof(struct llc_snap_hdr)); /* add LLC/SNAP header + tag */ 503 skb_copy_to_linear_data(skb, &llc_snap_mpoa_data, 504 sizeof(struct llc_snap_hdr)); 505 } 506 507 atomic_add(skb->truesize, &sk_atm(entry->shortcut)->sk_wmem_alloc); 508 ATM_SKB(skb)->atm_options = entry->shortcut->atm_options; 509 entry->shortcut->send(entry->shortcut, skb); 510 entry->packets_fwded++; 511 mpc->in_ops->put(entry); 512 513 return 0; 514} 515 516/* 517 * Probably needs some error checks and locking, not sure... 518 */ 519static int mpc_send_packet(struct sk_buff *skb, struct net_device *dev) 520{ 521 int retval; 522 struct mpoa_client *mpc; 523 struct ethhdr *eth; 524 int i = 0; 525 526 mpc = find_mpc_by_lec(dev); /* this should NEVER fail */ 527 if(mpc == NULL) { 528 printk("mpoa: (%s) mpc_send_packet: no MPC found\n", dev->name); 529 goto non_ip; 530 } 531 532 eth = (struct ethhdr *)skb->data; 533 if (eth->h_proto != htons(ETH_P_IP)) 534 goto non_ip; /* Multi-Protocol Over ATM :-) */ 535 536 while (i < mpc->number_of_mps_macs) { 537 if (!compare_ether_addr(eth->h_dest, (mpc->mps_macs + i*ETH_ALEN))) 538 if ( send_via_shortcut(skb, mpc) == 0 ) /* try shortcut */ 539 return 0; /* success! */ 540 i++; 541 } 542 543 non_ip: 544 retval = mpc->old_hard_start_xmit(skb,dev); 545 546 return retval; 547} 548 549static int atm_mpoa_vcc_attach(struct atm_vcc *vcc, void __user *arg) 550{ 551 int bytes_left; 552 struct mpoa_client *mpc; 553 struct atmmpc_ioc ioc_data; 554 in_cache_entry *in_entry; 555 __be32 ipaddr; 556 557 bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmmpc_ioc)); 558 if (bytes_left != 0) { 559 printk("mpoa: mpc_vcc_attach: Short read (missed %d bytes) from userland\n", bytes_left); 560 return -EFAULT; 561 } 562 ipaddr = ioc_data.ipaddr; 563 if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF) 564 return -EINVAL; 565 566 mpc = find_mpc_by_itfnum(ioc_data.dev_num); 567 if (mpc == NULL) 568 return -EINVAL; 569 570 if (ioc_data.type == MPC_SOCKET_INGRESS) { 571 in_entry = mpc->in_ops->get(ipaddr, mpc); 572 if (in_entry == NULL || in_entry->entry_state < INGRESS_RESOLVED) { 573 printk("mpoa: (%s) mpc_vcc_attach: did not find RESOLVED entry from ingress cache\n", 574 mpc->dev->name); 575 if (in_entry != NULL) mpc->in_ops->put(in_entry); 576 return -EINVAL; 577 } 578 printk("mpoa: (%s) mpc_vcc_attach: attaching ingress SVC, entry = %u.%u.%u.%u\n", 579 mpc->dev->name, NIPQUAD(in_entry->ctrl_info.in_dst_ip)); 580 in_entry->shortcut = vcc; 581 mpc->in_ops->put(in_entry); 582 } else { 583 printk("mpoa: (%s) mpc_vcc_attach: attaching egress SVC\n", mpc->dev->name); 584 } 585 586 vcc->proto_data = mpc->dev; 587 vcc->push = mpc_push; 588 589 return 0; 590} 591 592/* 593 * 594 */ 595static void mpc_vcc_close(struct atm_vcc *vcc, struct net_device *dev) 596{ 597 struct mpoa_client *mpc; 598 in_cache_entry *in_entry; 599 eg_cache_entry *eg_entry; 600 601 mpc = find_mpc_by_lec(dev); 602 if (mpc == NULL) { 603 printk("mpoa: (%s) mpc_vcc_close: close for unknown MPC\n", dev->name); 604 return; 605 } 606 607 dprintk("mpoa: (%s) mpc_vcc_close:\n", dev->name); 608 in_entry = mpc->in_ops->get_by_vcc(vcc, mpc); 609 if (in_entry) { 610 dprintk("mpoa: (%s) mpc_vcc_close: ingress SVC closed ip = %u.%u.%u.%u\n", 611 mpc->dev->name, NIPQUAD(in_entry->ctrl_info.in_dst_ip)); 612 in_entry->shortcut = NULL; 613 mpc->in_ops->put(in_entry); 614 } 615 eg_entry = mpc->eg_ops->get_by_vcc(vcc, mpc); 616 if (eg_entry) { 617 dprintk("mpoa: (%s) mpc_vcc_close: egress SVC closed\n", mpc->dev->name); 618 eg_entry->shortcut = NULL; 619 mpc->eg_ops->put(eg_entry); 620 } 621 622 if (in_entry == NULL && eg_entry == NULL) 623 dprintk("mpoa: (%s) mpc_vcc_close: unused vcc closed\n", dev->name); 624 625 return; 626} 627 628static void mpc_push(struct atm_vcc *vcc, struct sk_buff *skb) 629{ 630 struct net_device *dev = (struct net_device *)vcc->proto_data; 631 struct sk_buff *new_skb; 632 eg_cache_entry *eg; 633 struct mpoa_client *mpc; 634 __be32 tag; 635 char *tmp; 636 637 ddprintk("mpoa: (%s) mpc_push:\n", dev->name); 638 if (skb == NULL) { 639 dprintk("mpoa: (%s) mpc_push: null skb, closing VCC\n", dev->name); 640 mpc_vcc_close(vcc, dev); 641 return; 642 } 643 644 skb->dev = dev; 645 if (memcmp(skb->data, &llc_snap_mpoa_ctrl, sizeof(struct llc_snap_hdr)) == 0) { 646 struct sock *sk = sk_atm(vcc); 647 648 dprintk("mpoa: (%s) mpc_push: control packet arrived\n", dev->name); 649 /* Pass control packets to daemon */ 650 skb_queue_tail(&sk->sk_receive_queue, skb); 651 sk->sk_data_ready(sk, skb->len); 652 return; 653 } 654 655 /* data coming over the shortcut */ 656 atm_return(vcc, skb->truesize); 657 658 mpc = find_mpc_by_lec(dev); 659 if (mpc == NULL) { 660 printk("mpoa: (%s) mpc_push: unknown MPC\n", dev->name); 661 return; 662 } 663 664 if (memcmp(skb->data, &llc_snap_mpoa_data_tagged, sizeof(struct llc_snap_hdr)) == 0) { /* MPOA tagged data */ 665 ddprintk("mpoa: (%s) mpc_push: tagged data packet arrived\n", dev->name); 666 667 } else if (memcmp(skb->data, &llc_snap_mpoa_data, sizeof(struct llc_snap_hdr)) == 0) { /* MPOA data */ 668 printk("mpoa: (%s) mpc_push: non-tagged data packet arrived\n", dev->name); 669 printk(" mpc_push: non-tagged data unsupported, purging\n"); 670 dev_kfree_skb_any(skb); 671 return; 672 } else { 673 printk("mpoa: (%s) mpc_push: garbage arrived, purging\n", dev->name); 674 dev_kfree_skb_any(skb); 675 return; 676 } 677 678 tmp = skb->data + sizeof(struct llc_snap_hdr); 679 tag = *(__be32 *)tmp; 680 681 eg = mpc->eg_ops->get_by_tag(tag, mpc); 682 if (eg == NULL) { 683 printk("mpoa: (%s) mpc_push: Didn't find egress cache entry, tag = %u\n", 684 dev->name,tag); 685 purge_egress_shortcut(vcc, NULL); 686 dev_kfree_skb_any(skb); 687 return; 688 } 689 690 /* 691 * See if ingress MPC is using shortcut we opened as a return channel. 692 * This means we have a bi-directional vcc opened by us. 693 */ 694 if (eg->shortcut == NULL) { 695 eg->shortcut = vcc; 696 printk("mpoa: (%s) mpc_push: egress SVC in use\n", dev->name); 697 } 698 699 skb_pull(skb, sizeof(struct llc_snap_hdr) + sizeof(tag)); /* get rid of LLC/SNAP header */ 700 new_skb = skb_realloc_headroom(skb, eg->ctrl_info.DH_length); /* LLC/SNAP is shorter than MAC header :( */ 701 dev_kfree_skb_any(skb); 702 if (new_skb == NULL){ 703 mpc->eg_ops->put(eg); 704 return; 705 } 706 skb_push(new_skb, eg->ctrl_info.DH_length); /* add MAC header */ 707 skb_copy_to_linear_data(new_skb, eg->ctrl_info.DLL_header, 708 eg->ctrl_info.DH_length); 709 new_skb->protocol = eth_type_trans(new_skb, dev); 710 skb_reset_network_header(new_skb); 711 712 eg->latest_ip_addr = ip_hdr(new_skb)->saddr; 713 eg->packets_rcvd++; 714 mpc->eg_ops->put(eg); 715 716 memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data)); 717 netif_rx(new_skb); 718 719 return; 720} 721 722static struct atmdev_ops mpc_ops = { /* only send is required */ 723 .close = mpoad_close, 724 .send = msg_from_mpoad 725}; 726 727static struct atm_dev mpc_dev = { 728 .ops = &mpc_ops, 729 .type = "mpc", 730 .number = 42, 731 .lock = __SPIN_LOCK_UNLOCKED(mpc_dev.lock) 732 /* members not explicitly initialised will be 0 */ 733}; 734 735static int atm_mpoa_mpoad_attach (struct atm_vcc *vcc, int arg) 736{ 737 struct mpoa_client *mpc; 738 struct lec_priv *priv; 739 int err; 740 741 if (mpcs == NULL) { 742 init_timer(&mpc_timer); 743 mpc_timer_refresh(); 744 745 /* This lets us now how our LECs are doing */ 746 err = register_netdevice_notifier(&mpoa_notifier); 747 if (err < 0) { 748 del_timer(&mpc_timer); 749 return err; 750 } 751 } 752 753 mpc = find_mpc_by_itfnum(arg); 754 if (mpc == NULL) { 755 dprintk("mpoa: mpoad_attach: allocating new mpc for itf %d\n", arg); 756 mpc = alloc_mpc(); 757 if (mpc == NULL) 758 return -ENOMEM; 759 mpc->dev_num = arg; 760 mpc->dev = find_lec_by_itfnum(arg); /* NULL if there was no lec */ 761 } 762 if (mpc->mpoad_vcc) { 763 printk("mpoa: mpoad_attach: mpoad is already present for itf %d\n", arg); 764 return -EADDRINUSE; 765 } 766 767 if (mpc->dev) { /* check if the lec is LANE2 capable */ 768 priv = (struct lec_priv *)mpc->dev->priv; 769 if (priv->lane_version < 2) { 770 dev_put(mpc->dev); 771 mpc->dev = NULL; 772 } else 773 priv->lane2_ops->associate_indicator = lane2_assoc_ind; 774 } 775 776 mpc->mpoad_vcc = vcc; 777 vcc->dev = &mpc_dev; 778 vcc_insert_socket(sk_atm(vcc)); 779 set_bit(ATM_VF_META,&vcc->flags); 780 set_bit(ATM_VF_READY,&vcc->flags); 781 782 if (mpc->dev) { 783 char empty[ATM_ESA_LEN]; 784 memset(empty, 0, ATM_ESA_LEN); 785 786 start_mpc(mpc, mpc->dev); 787 /* set address if mpcd e.g. gets killed and restarted. 788 * If we do not do it now we have to wait for the next LE_ARP 789 */ 790 if ( memcmp(mpc->mps_ctrl_addr, empty, ATM_ESA_LEN) != 0 ) 791 send_set_mps_ctrl_addr(mpc->mps_ctrl_addr, mpc); 792 } 793 794 __module_get(THIS_MODULE); 795 return arg; 796} 797 798static void send_set_mps_ctrl_addr(char *addr, struct mpoa_client *mpc) 799{ 800 struct k_message mesg; 801 802 memcpy (mpc->mps_ctrl_addr, addr, ATM_ESA_LEN); 803 804 mesg.type = SET_MPS_CTRL_ADDR; 805 memcpy(mesg.MPS_ctrl, addr, ATM_ESA_LEN); 806 msg_to_mpoad(&mesg, mpc); 807 808 return; 809} 810 811static void mpoad_close(struct atm_vcc *vcc) 812{ 813 struct mpoa_client *mpc; 814 struct sk_buff *skb; 815 816 mpc = find_mpc_by_vcc(vcc); 817 if (mpc == NULL) { 818 printk("mpoa: mpoad_close: did not find MPC\n"); 819 return; 820 } 821 if (!mpc->mpoad_vcc) { 822 printk("mpoa: mpoad_close: close for non-present mpoad\n"); 823 return; 824 } 825 826 mpc->mpoad_vcc = NULL; 827 if (mpc->dev) { 828 struct lec_priv *priv = (struct lec_priv *)mpc->dev->priv; 829 priv->lane2_ops->associate_indicator = NULL; 830 stop_mpc(mpc); 831 dev_put(mpc->dev); 832 } 833 834 mpc->in_ops->destroy_cache(mpc); 835 mpc->eg_ops->destroy_cache(mpc); 836 837 while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue))) { 838 atm_return(vcc, skb->truesize); 839 kfree_skb(skb); 840 } 841 842 printk("mpoa: (%s) going down\n", 843 (mpc->dev) ? mpc->dev->name : "<unknown>"); 844 module_put(THIS_MODULE); 845 846 return; 847} 848 849/* 850 * 851 */ 852static int msg_from_mpoad(struct atm_vcc *vcc, struct sk_buff *skb) 853{ 854 855 struct mpoa_client *mpc = find_mpc_by_vcc(vcc); 856 struct k_message *mesg = (struct k_message*)skb->data; 857 atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); 858 859 if (mpc == NULL) { 860 printk("mpoa: msg_from_mpoad: no mpc found\n"); 861 return 0; 862 } 863 dprintk("mpoa: (%s) msg_from_mpoad:", (mpc->dev) ? mpc->dev->name : "<unknown>"); 864 switch(mesg->type) { 865 case MPOA_RES_REPLY_RCVD: 866 dprintk(" mpoa_res_reply_rcvd\n"); 867 MPOA_res_reply_rcvd(mesg, mpc); 868 break; 869 case MPOA_TRIGGER_RCVD: 870 dprintk(" mpoa_trigger_rcvd\n"); 871 MPOA_trigger_rcvd(mesg, mpc); 872 break; 873 case INGRESS_PURGE_RCVD: 874 dprintk(" nhrp_purge_rcvd\n"); 875 ingress_purge_rcvd(mesg, mpc); 876 break; 877 case EGRESS_PURGE_RCVD: 878 dprintk(" egress_purge_reply_rcvd\n"); 879 egress_purge_rcvd(mesg, mpc); 880 break; 881 case MPS_DEATH: 882 dprintk(" mps_death\n"); 883 mps_death(mesg, mpc); 884 break; 885 case CACHE_IMPOS_RCVD: 886 dprintk(" cache_impos_rcvd\n"); 887 MPOA_cache_impos_rcvd(mesg, mpc); 888 break; 889 case SET_MPC_CTRL_ADDR: 890 dprintk(" set_mpc_ctrl_addr\n"); 891 set_mpc_ctrl_addr_rcvd(mesg, mpc); 892 break; 893 case SET_MPS_MAC_ADDR: 894 dprintk(" set_mps_mac_addr\n"); 895 set_mps_mac_addr_rcvd(mesg, mpc); 896 break; 897 case CLEAN_UP_AND_EXIT: 898 dprintk(" clean_up_and_exit\n"); 899 clean_up(mesg, mpc, DIE); 900 break; 901 case RELOAD: 902 dprintk(" reload\n"); 903 clean_up(mesg, mpc, RELOAD); 904 break; 905 case SET_MPC_PARAMS: 906 dprintk(" set_mpc_params\n"); 907 mpc->parameters = mesg->content.params; 908 break; 909 default: 910 dprintk(" unknown message %d\n", mesg->type); 911 break; 912 } 913 kfree_skb(skb); 914 915 return 0; 916} 917 918/* Remember that this function may not do things that sleep */ 919int msg_to_mpoad(struct k_message *mesg, struct mpoa_client *mpc) 920{ 921 struct sk_buff *skb; 922 struct sock *sk; 923 924 if (mpc == NULL || !mpc->mpoad_vcc) { 925 printk("mpoa: msg_to_mpoad: mesg %d to a non-existent mpoad\n", mesg->type); 926 return -ENXIO; 927 } 928 929 skb = alloc_skb(sizeof(struct k_message), GFP_ATOMIC); 930 if (skb == NULL) 931 return -ENOMEM; 932 skb_put(skb, sizeof(struct k_message)); 933 skb_copy_to_linear_data(skb, mesg, sizeof(*mesg)); 934 atm_force_charge(mpc->mpoad_vcc, skb->truesize); 935 936 sk = sk_atm(mpc->mpoad_vcc); 937 skb_queue_tail(&sk->sk_receive_queue, skb); 938 sk->sk_data_ready(sk, skb->len); 939 940 return 0; 941} 942 943static int mpoa_event_listener(struct notifier_block *mpoa_notifier, unsigned long event, void *dev_ptr) 944{ 945 struct net_device *dev; 946 struct mpoa_client *mpc; 947 struct lec_priv *priv; 948 949 dev = (struct net_device *)dev_ptr; 950 if (dev->name == NULL || strncmp(dev->name, "lec", 3)) 951 return NOTIFY_DONE; /* we are only interested in lec:s */ 952 953 switch (event) { 954 case NETDEV_REGISTER: /* a new lec device was allocated */ 955 priv = (struct lec_priv *)dev->priv; 956 if (priv->lane_version < 2) 957 break; 958 priv->lane2_ops->associate_indicator = lane2_assoc_ind; 959 mpc = find_mpc_by_itfnum(priv->itfnum); 960 if (mpc == NULL) { 961 dprintk("mpoa: mpoa_event_listener: allocating new mpc for %s\n", 962 dev->name); 963 mpc = alloc_mpc(); 964 if (mpc == NULL) { 965 printk("mpoa: mpoa_event_listener: no new mpc"); 966 break; 967 } 968 } 969 mpc->dev_num = priv->itfnum; 970 mpc->dev = dev; 971 dev_hold(dev); 972 dprintk("mpoa: (%s) was initialized\n", dev->name); 973 break; 974 case NETDEV_UNREGISTER: 975 /* the lec device was deallocated */ 976 mpc = find_mpc_by_lec(dev); 977 if (mpc == NULL) 978 break; 979 dprintk("mpoa: device (%s) was deallocated\n", dev->name); 980 stop_mpc(mpc); 981 dev_put(mpc->dev); 982 mpc->dev = NULL; 983 break; 984 case NETDEV_UP: 985 /* the dev was ifconfig'ed up */ 986 mpc = find_mpc_by_lec(dev); 987 if (mpc == NULL) 988 break; 989 if (mpc->mpoad_vcc != NULL) { 990 start_mpc(mpc, dev); 991 } 992 break; 993 case NETDEV_DOWN: 994 /* the dev was ifconfig'ed down */ 995 /* this means that the flow of packets from the 996 * upper layer stops 997 */ 998 mpc = find_mpc_by_lec(dev); 999 if (mpc == NULL) 1000 break; 1001 if (mpc->mpoad_vcc != NULL) { 1002 stop_mpc(mpc); 1003 } 1004 break; 1005 case NETDEV_REBOOT: 1006 case NETDEV_CHANGE: 1007 case NETDEV_CHANGEMTU: 1008 case NETDEV_CHANGEADDR: 1009 case NETDEV_GOING_DOWN: 1010 break; 1011 default: 1012 break; 1013 } 1014 1015 return NOTIFY_DONE; 1016} 1017 1018/* 1019 * Functions which are called after a message is received from mpcd. 1020 * Msg is reused on purpose. 1021 */ 1022 1023 1024static void MPOA_trigger_rcvd(struct k_message *msg, struct mpoa_client *mpc) 1025{ 1026 __be32 dst_ip = msg->content.in_info.in_dst_ip; 1027 in_cache_entry *entry; 1028 1029 entry = mpc->in_ops->get(dst_ip, mpc); 1030 if(entry == NULL){ 1031 entry = mpc->in_ops->add_entry(dst_ip, mpc); 1032 entry->entry_state = INGRESS_RESOLVING; 1033 msg->type = SND_MPOA_RES_RQST; 1034 msg->content.in_info = entry->ctrl_info; 1035 msg_to_mpoad(msg, mpc); 1036 do_gettimeofday(&(entry->reply_wait)); 1037 mpc->in_ops->put(entry); 1038 return; 1039 } 1040 1041 if(entry->entry_state == INGRESS_INVALID){ 1042 entry->entry_state = INGRESS_RESOLVING; 1043 msg->type = SND_MPOA_RES_RQST; 1044 msg->content.in_info = entry->ctrl_info; 1045 msg_to_mpoad(msg, mpc); 1046 do_gettimeofday(&(entry->reply_wait)); 1047 mpc->in_ops->put(entry); 1048 return; 1049 } 1050 1051 printk("mpoa: (%s) MPOA_trigger_rcvd: entry already in resolving state\n", 1052 (mpc->dev) ? mpc->dev->name : "<unknown>"); 1053 mpc->in_ops->put(entry); 1054 return; 1055} 1056 1057/* 1058 * Things get complicated because we have to check if there's an egress 1059 * shortcut with suitable traffic parameters we could use. 1060 */ 1061static void check_qos_and_open_shortcut(struct k_message *msg, struct mpoa_client *client, in_cache_entry *entry) 1062{ 1063 __be32 dst_ip = msg->content.in_info.in_dst_ip; 1064 struct atm_mpoa_qos *qos = atm_mpoa_search_qos(dst_ip); 1065 eg_cache_entry *eg_entry = client->eg_ops->get_by_src_ip(dst_ip, client); 1066 1067 if(eg_entry && eg_entry->shortcut){ 1068 if(eg_entry->shortcut->qos.txtp.traffic_class & 1069 msg->qos.txtp.traffic_class & 1070 (qos ? qos->qos.txtp.traffic_class : ATM_UBR | ATM_CBR)){ 1071 if(eg_entry->shortcut->qos.txtp.traffic_class == ATM_UBR) 1072 entry->shortcut = eg_entry->shortcut; 1073 else if(eg_entry->shortcut->qos.txtp.max_pcr > 0) 1074 entry->shortcut = eg_entry->shortcut; 1075 } 1076 if(entry->shortcut){ 1077 dprintk("mpoa: (%s) using egress SVC to reach %u.%u.%u.%u\n",client->dev->name, NIPQUAD(dst_ip)); 1078 client->eg_ops->put(eg_entry); 1079 return; 1080 } 1081 } 1082 if (eg_entry != NULL) 1083 client->eg_ops->put(eg_entry); 1084 1085 /* No luck in the egress cache we must open an ingress SVC */ 1086 msg->type = OPEN_INGRESS_SVC; 1087 if (qos && (qos->qos.txtp.traffic_class == msg->qos.txtp.traffic_class)) 1088 { 1089 msg->qos = qos->qos; 1090 printk("mpoa: (%s) trying to get a CBR shortcut\n",client->dev->name); 1091 } 1092 else memset(&msg->qos,0,sizeof(struct atm_qos)); 1093 msg_to_mpoad(msg, client); 1094 return; 1095} 1096 1097static void MPOA_res_reply_rcvd(struct k_message *msg, struct mpoa_client *mpc) 1098{ 1099 __be32 dst_ip = msg->content.in_info.in_dst_ip; 1100 in_cache_entry *entry = mpc->in_ops->get(dst_ip, mpc); 1101 1102 dprintk("mpoa: (%s) MPOA_res_reply_rcvd: ip %u.%u.%u.%u\n", mpc->dev->name, NIPQUAD(dst_ip)); 1103 ddprintk("mpoa: (%s) MPOA_res_reply_rcvd() entry = %p", mpc->dev->name, entry); 1104 if(entry == NULL){ 1105 printk("\nmpoa: (%s) ARGH, received res. reply for an entry that doesn't exist.\n", mpc->dev->name); 1106 return; 1107 } 1108 ddprintk(" entry_state = %d ", entry->entry_state); 1109 1110 if (entry->entry_state == INGRESS_RESOLVED) { 1111 printk("\nmpoa: (%s) MPOA_res_reply_rcvd for RESOLVED entry!\n", mpc->dev->name); 1112 mpc->in_ops->put(entry); 1113 return; 1114 } 1115 1116 entry->ctrl_info = msg->content.in_info; 1117 do_gettimeofday(&(entry->tv)); 1118 do_gettimeofday(&(entry->reply_wait)); /* Used in refreshing func from now on */ 1119 entry->refresh_time = 0; 1120 ddprintk("entry->shortcut = %p\n", entry->shortcut); 1121 1122 if(entry->entry_state == INGRESS_RESOLVING && entry->shortcut != NULL){ 1123 entry->entry_state = INGRESS_RESOLVED; 1124 mpc->in_ops->put(entry); 1125 return; /* Shortcut already open... */ 1126 } 1127 1128 if (entry->shortcut != NULL) { 1129 printk("mpoa: (%s) MPOA_res_reply_rcvd: entry->shortcut != NULL, impossible!\n", 1130 mpc->dev->name); 1131 mpc->in_ops->put(entry); 1132 return; 1133 } 1134 1135 check_qos_and_open_shortcut(msg, mpc, entry); 1136 entry->entry_state = INGRESS_RESOLVED; 1137 mpc->in_ops->put(entry); 1138 1139 return; 1140 1141} 1142 1143static void ingress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc) 1144{ 1145 __be32 dst_ip = msg->content.in_info.in_dst_ip; 1146 __be32 mask = msg->ip_mask; 1147 in_cache_entry *entry = mpc->in_ops->get_with_mask(dst_ip, mpc, mask); 1148 1149 if(entry == NULL){ 1150 printk("mpoa: (%s) ingress_purge_rcvd: purge for a non-existing entry, ", mpc->dev->name); 1151 printk("ip = %u.%u.%u.%u\n", NIPQUAD(dst_ip)); 1152 return; 1153 } 1154 1155 do { 1156 dprintk("mpoa: (%s) ingress_purge_rcvd: removing an ingress entry, ip = %u.%u.%u.%u\n" , 1157 mpc->dev->name, NIPQUAD(dst_ip)); 1158 write_lock_bh(&mpc->ingress_lock); 1159 mpc->in_ops->remove_entry(entry, mpc); 1160 write_unlock_bh(&mpc->ingress_lock); 1161 mpc->in_ops->put(entry); 1162 entry = mpc->in_ops->get_with_mask(dst_ip, mpc, mask); 1163 } while (entry != NULL); 1164 1165 return; 1166} 1167 1168static void egress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc) 1169{ 1170 __be32 cache_id = msg->content.eg_info.cache_id; 1171 eg_cache_entry *entry = mpc->eg_ops->get_by_cache_id(cache_id, mpc); 1172 1173 if (entry == NULL) { 1174 dprintk("mpoa: (%s) egress_purge_rcvd: purge for a non-existing entry\n", mpc->dev->name); 1175 return; 1176 } 1177 1178 write_lock_irq(&mpc->egress_lock); 1179 mpc->eg_ops->remove_entry(entry, mpc); 1180 write_unlock_irq(&mpc->egress_lock); 1181 1182 mpc->eg_ops->put(entry); 1183 1184 return; 1185} 1186 1187static void purge_egress_shortcut(struct atm_vcc *vcc, eg_cache_entry *entry) 1188{ 1189 struct sock *sk; 1190 struct k_message *purge_msg; 1191 struct sk_buff *skb; 1192 1193 dprintk("mpoa: purge_egress_shortcut: entering\n"); 1194 if (vcc == NULL) { 1195 printk("mpoa: purge_egress_shortcut: vcc == NULL\n"); 1196 return; 1197 } 1198 1199 skb = alloc_skb(sizeof(struct k_message), GFP_ATOMIC); 1200 if (skb == NULL) { 1201 printk("mpoa: purge_egress_shortcut: out of memory\n"); 1202 return; 1203 } 1204 1205 skb_put(skb, sizeof(struct k_message)); 1206 memset(skb->data, 0, sizeof(struct k_message)); 1207 purge_msg = (struct k_message *)skb->data; 1208 purge_msg->type = DATA_PLANE_PURGE; 1209 if (entry != NULL) 1210 purge_msg->content.eg_info = entry->ctrl_info; 1211 1212 atm_force_charge(vcc, skb->truesize); 1213 1214 sk = sk_atm(vcc); 1215 skb_queue_tail(&sk->sk_receive_queue, skb); 1216 sk->sk_data_ready(sk, skb->len); 1217 dprintk("mpoa: purge_egress_shortcut: exiting:\n"); 1218 1219 return; 1220} 1221 1222/* 1223 * Our MPS died. Tell our daemon to send NHRP data plane purge to each 1224 * of the egress shortcuts we have. 1225 */ 1226static void mps_death( struct k_message * msg, struct mpoa_client * mpc ) 1227{ 1228 eg_cache_entry *entry; 1229 1230 dprintk("mpoa: (%s) mps_death:\n", mpc->dev->name); 1231 1232 if(memcmp(msg->MPS_ctrl, mpc->mps_ctrl_addr, ATM_ESA_LEN)){ 1233 printk("mpoa: (%s) mps_death: wrong MPS\n", mpc->dev->name); 1234 return; 1235 } 1236 1237 read_lock_irq(&mpc->egress_lock); 1238 entry = mpc->eg_cache; 1239 while (entry != NULL) { 1240 purge_egress_shortcut(entry->shortcut, entry); 1241 entry = entry->next; 1242 } 1243 read_unlock_irq(&mpc->egress_lock); 1244 1245 mpc->in_ops->destroy_cache(mpc); 1246 mpc->eg_ops->destroy_cache(mpc); 1247 1248 return; 1249} 1250 1251static void MPOA_cache_impos_rcvd( struct k_message * msg, struct mpoa_client * mpc) 1252{ 1253 uint16_t holding_time; 1254 eg_cache_entry *entry = mpc->eg_ops->get_by_cache_id(msg->content.eg_info.cache_id, mpc); 1255 1256 holding_time = msg->content.eg_info.holding_time; 1257 dprintk("mpoa: (%s) MPOA_cache_impos_rcvd: entry = %p, holding_time = %u\n", 1258 mpc->dev->name, entry, holding_time); 1259 if(entry == NULL && holding_time) { 1260 entry = mpc->eg_ops->add_entry(msg, mpc); 1261 mpc->eg_ops->put(entry); 1262 return; 1263 } 1264 if(holding_time){ 1265 mpc->eg_ops->update(entry, holding_time); 1266 return; 1267 } 1268 1269 write_lock_irq(&mpc->egress_lock); 1270 mpc->eg_ops->remove_entry(entry, mpc); 1271 write_unlock_irq(&mpc->egress_lock); 1272 1273 mpc->eg_ops->put(entry); 1274 1275 return; 1276} 1277 1278static void set_mpc_ctrl_addr_rcvd(struct k_message *mesg, struct mpoa_client *mpc) 1279{ 1280 struct lec_priv *priv; 1281 int i, retval ; 1282 1283 uint8_t tlv[4 + 1 + 1 + 1 + ATM_ESA_LEN]; 1284 1285 tlv[0] = 00; tlv[1] = 0xa0; tlv[2] = 0x3e; tlv[3] = 0x2a; /* type */ 1286 tlv[4] = 1 + 1 + ATM_ESA_LEN; /* length */ 1287 tlv[5] = 0x02; /* MPOA client */ 1288 tlv[6] = 0x00; /* number of MPS MAC addresses */ 1289 1290 memcpy(&tlv[7], mesg->MPS_ctrl, ATM_ESA_LEN); /* MPC ctrl ATM addr */ 1291 memcpy(mpc->our_ctrl_addr, mesg->MPS_ctrl, ATM_ESA_LEN); 1292 1293 dprintk("mpoa: (%s) setting MPC ctrl ATM address to ", 1294 (mpc->dev) ? mpc->dev->name : "<unknown>"); 1295 for (i = 7; i < sizeof(tlv); i++) 1296 dprintk("%02x ", tlv[i]); 1297 dprintk("\n"); 1298 1299 if (mpc->dev) { 1300 priv = (struct lec_priv *)mpc->dev->priv; 1301 retval = priv->lane2_ops->associate_req(mpc->dev, mpc->dev->dev_addr, tlv, sizeof(tlv)); 1302 if (retval == 0) 1303 printk("mpoa: (%s) MPOA device type TLV association failed\n", mpc->dev->name); 1304 retval = priv->lane2_ops->resolve(mpc->dev, NULL, 1, NULL, NULL); 1305 if (retval < 0) 1306 printk("mpoa: (%s) targetless LE_ARP request failed\n", mpc->dev->name); 1307 } 1308 1309 return; 1310} 1311 1312static void set_mps_mac_addr_rcvd(struct k_message *msg, struct mpoa_client *client) 1313{ 1314 1315 if(client->number_of_mps_macs) 1316 kfree(client->mps_macs); 1317 client->number_of_mps_macs = 0; 1318 client->mps_macs = kmemdup(msg->MPS_ctrl, ETH_ALEN, GFP_KERNEL); 1319 if (client->mps_macs == NULL) { 1320 printk("mpoa: set_mps_mac_addr_rcvd: out of memory\n"); 1321 return; 1322 } 1323 client->number_of_mps_macs = 1; 1324 1325 return; 1326} 1327 1328/* 1329 * purge egress cache and tell daemon to 'action' (DIE, RELOAD) 1330 */ 1331static void clean_up(struct k_message *msg, struct mpoa_client *mpc, int action) 1332{ 1333 1334 eg_cache_entry *entry; 1335 msg->type = SND_EGRESS_PURGE; 1336 1337 1338 read_lock_irq(&mpc->egress_lock); 1339 entry = mpc->eg_cache; 1340 while (entry != NULL){ 1341 msg->content.eg_info = entry->ctrl_info; 1342 dprintk("mpoa: cache_id %u\n", entry->ctrl_info.cache_id); 1343 msg_to_mpoad(msg, mpc); 1344 entry = entry->next; 1345 } 1346 read_unlock_irq(&mpc->egress_lock); 1347 1348 msg->type = action; 1349 msg_to_mpoad(msg, mpc); 1350 return; 1351} 1352 1353static void mpc_timer_refresh(void) 1354{ 1355 mpc_timer.expires = jiffies + (MPC_P2 * HZ); 1356 mpc_timer.data = mpc_timer.expires; 1357 mpc_timer.function = mpc_cache_check; 1358 add_timer(&mpc_timer); 1359 1360 return; 1361} 1362 1363static void mpc_cache_check( unsigned long checking_time ) 1364{ 1365 struct mpoa_client *mpc = mpcs; 1366 static unsigned long previous_resolving_check_time; 1367 static unsigned long previous_refresh_time; 1368 1369 while( mpc != NULL ){ 1370 mpc->in_ops->clear_count(mpc); 1371 mpc->eg_ops->clear_expired(mpc); 1372 if(checking_time - previous_resolving_check_time > mpc->parameters.mpc_p4 * HZ ){ 1373 mpc->in_ops->check_resolving(mpc); 1374 previous_resolving_check_time = checking_time; 1375 } 1376 if(checking_time - previous_refresh_time > mpc->parameters.mpc_p5 * HZ ){ 1377 mpc->in_ops->refresh(mpc); 1378 previous_refresh_time = checking_time; 1379 } 1380 mpc = mpc->next; 1381 } 1382 mpc_timer_refresh(); 1383 1384 return; 1385} 1386 1387static int atm_mpoa_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 1388{ 1389 int err = 0; 1390 struct atm_vcc *vcc = ATM_SD(sock); 1391 1392 if (cmd != ATMMPC_CTRL && cmd != ATMMPC_DATA) 1393 return -ENOIOCTLCMD; 1394 1395 if (!capable(CAP_NET_ADMIN)) 1396 return -EPERM; 1397 1398 switch (cmd) { 1399 case ATMMPC_CTRL: 1400 err = atm_mpoa_mpoad_attach(vcc, (int)arg); 1401 if (err >= 0) 1402 sock->state = SS_CONNECTED; 1403 break; 1404 case ATMMPC_DATA: 1405 err = atm_mpoa_vcc_attach(vcc, (void __user *)arg); 1406 break; 1407 default: 1408 break; 1409 } 1410 return err; 1411} 1412 1413 1414static struct atm_ioctl atm_ioctl_ops = { 1415 .owner = THIS_MODULE, 1416 .ioctl = atm_mpoa_ioctl, 1417}; 1418 1419static __init int atm_mpoa_init(void) 1420{ 1421 register_atm_ioctl(&atm_ioctl_ops); 1422 1423 if (mpc_proc_init() != 0) 1424 printk(KERN_INFO "mpoa: failed to initialize /proc/mpoa\n"); 1425 1426 printk("mpc.c: " __DATE__ " " __TIME__ " initialized\n"); 1427 1428 return 0; 1429} 1430 1431static void __exit atm_mpoa_cleanup(void) 1432{ 1433 struct mpoa_client *mpc, *tmp; 1434 struct atm_mpoa_qos *qos, *nextqos; 1435 struct lec_priv *priv; 1436 1437 mpc_proc_clean(); 1438 1439 del_timer(&mpc_timer); 1440 unregister_netdevice_notifier(&mpoa_notifier); 1441 deregister_atm_ioctl(&atm_ioctl_ops); 1442 1443 mpc = mpcs; 1444 mpcs = NULL; 1445 while (mpc != NULL) { 1446 tmp = mpc->next; 1447 if (mpc->dev != NULL) { 1448 stop_mpc(mpc); 1449 priv = (struct lec_priv *)mpc->dev->priv; 1450 if (priv->lane2_ops != NULL) 1451 priv->lane2_ops->associate_indicator = NULL; 1452 } 1453 ddprintk("mpoa: cleanup_module: about to clear caches\n"); 1454 mpc->in_ops->destroy_cache(mpc); 1455 mpc->eg_ops->destroy_cache(mpc); 1456 ddprintk("mpoa: cleanup_module: caches cleared\n"); 1457 kfree(mpc->mps_macs); 1458 memset(mpc, 0, sizeof(struct mpoa_client)); 1459 ddprintk("mpoa: cleanup_module: about to kfree %p\n", mpc); 1460 kfree(mpc); 1461 ddprintk("mpoa: cleanup_module: next mpc is at %p\n", tmp); 1462 mpc = tmp; 1463 } 1464 1465 qos = qos_head; 1466 qos_head = NULL; 1467 while (qos != NULL) { 1468 nextqos = qos->next; 1469 dprintk("mpoa: cleanup_module: freeing qos entry %p\n", qos); 1470 kfree(qos); 1471 qos = nextqos; 1472 } 1473 1474 return; 1475} 1476 1477module_init(atm_mpoa_init); 1478module_exit(atm_mpoa_cleanup); 1479 1480MODULE_LICENSE("GPL"); 1481