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 #if 0 39 #define dprintk printk /* debug */ 40 #else 41 #define dprintk(format,args...) 42 #endif 43 44 #if 0 45 #define ddprintk printk /* more debug */ 46 #else 47 #define ddprintk(format,args...) 48 #endif 49 50 51 52 #define MPOA_TAG_LEN 4 53 54 /* mpc_daemon -> kernel */ 55 static void MPOA_trigger_rcvd (struct k_message *msg, struct mpoa_client *mpc); 56 static void MPOA_res_reply_rcvd(struct k_message *msg, struct mpoa_client *mpc); 57 static void ingress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc); 58 static void egress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc); 59 static void mps_death(struct k_message *msg, struct mpoa_client *mpc); 60 static void clean_up(struct k_message *msg, struct mpoa_client *mpc, int action); 61 static void MPOA_cache_impos_rcvd(struct k_message *msg, struct mpoa_client *mpc); 62 static void set_mpc_ctrl_addr_rcvd(struct k_message *mesg, struct mpoa_client *mpc); 63 static void set_mps_mac_addr_rcvd(struct k_message *mesg, struct mpoa_client *mpc); 64 65 static uint8_t *copy_macs(struct mpoa_client *mpc, uint8_t *router_mac, 66 uint8_t *tlvs, uint8_t mps_macs, uint8_t device_type); 67 static void purge_egress_shortcut(struct atm_vcc *vcc, eg_cache_entry *entry); 68 69 static void send_set_mps_ctrl_addr(char *addr, struct mpoa_client *mpc); 70 static void mpoad_close(struct atm_vcc *vcc); 71 static int msg_from_mpoad(struct atm_vcc *vcc, struct sk_buff *skb); 72 73 static void mpc_push(struct atm_vcc *vcc, struct sk_buff *skb); 74 static int mpc_send_packet(struct sk_buff *skb, struct net_device *dev); 75 static int mpoa_event_listener(struct notifier_block *mpoa_notifier, unsigned long event, void *dev); 76 static void mpc_timer_refresh(void); 77 static void mpc_cache_check( unsigned long checking_time ); 78 79 static struct llc_snap_hdr llc_snap_mpoa_ctrl = { 80 0xaa, 0xaa, 0x03, 81 {0x00, 0x00, 0x5e}, 82 {0x00, 0x03} /* For MPOA control PDUs */ 83 }; 84 static struct llc_snap_hdr llc_snap_mpoa_data = { 85 0xaa, 0xaa, 0x03, 86 {0x00, 0x00, 0x00}, 87 {0x08, 0x00} /* This is for IP PDUs only */ 88 }; 89 static struct llc_snap_hdr llc_snap_mpoa_data_tagged = { 90 0xaa, 0xaa, 0x03, 91 {0x00, 0x00, 0x00}, 92 {0x88, 0x4c} /* This is for tagged data PDUs */ 93 }; 94 95 static struct notifier_block mpoa_notifier = { 96 mpoa_event_listener, 97 NULL, 98 0 99 }; 100 101 #ifdef CONFIG_PROC_FS 102 extern int mpc_proc_init(void); 103 extern void mpc_proc_clean(void); 104 #endif 105 106 struct mpoa_client *mpcs = NULL; /* FIXME */ 107 static struct atm_mpoa_qos *qos_head = NULL; 108 static DEFINE_TIMER(mpc_timer, NULL, 0, 0); 109 110 111 static struct mpoa_client *find_mpc_by_itfnum(int itf) 112 { 113 struct mpoa_client *mpc; 114 115 mpc = mpcs; /* our global linked list */ 116 while (mpc != NULL) { 117 if (mpc->dev_num == itf) 118 return mpc; 119 mpc = mpc->next; 120 } 121 122 return NULL; /* not found */ 123 } 124 125 static struct mpoa_client *find_mpc_by_vcc(struct atm_vcc *vcc) 126 { 127 struct mpoa_client *mpc; 128 129 mpc = mpcs; /* our global linked list */ 130 while (mpc != NULL) { 131 if (mpc->mpoad_vcc == vcc) 132 return mpc; 133 mpc = mpc->next; 134 } 135 136 return NULL; /* not found */ 137 } 138 139 static struct mpoa_client *find_mpc_by_lec(struct net_device *dev) 140 { 141 struct mpoa_client *mpc; 142 143 mpc = mpcs; /* our global linked list */ 144 while (mpc != NULL) { 145 if (mpc->dev == dev) 146 return mpc; 147 mpc = mpc->next; 148 } 149 150 return NULL; /* not found */ 151 } 152 153 /* 154 * Functions for managing QoS list 155 */ 156 157 /* 158 * Overwrites the old entry or makes a new one. 159 */ 160 struct atm_mpoa_qos *atm_mpoa_add_qos(uint32_t dst_ip, struct atm_qos *qos) 161 { 162 struct atm_mpoa_qos *entry; 163 164 entry = atm_mpoa_search_qos(dst_ip); 165 if (entry != NULL) { 166 entry->qos = *qos; 167 return entry; 168 } 169 170 entry = kmalloc(sizeof(struct atm_mpoa_qos), GFP_KERNEL); 171 if (entry == NULL) { 172 printk("mpoa: atm_mpoa_add_qos: out of memory\n"); 173 return entry; 174 } 175 176 entry->ipaddr = dst_ip; 177 entry->qos = *qos; 178 179 entry->next = qos_head; 180 qos_head = entry; 181 182 return entry; 183 } 184 185 struct atm_mpoa_qos *atm_mpoa_search_qos(uint32_t dst_ip) 186 { 187 struct atm_mpoa_qos *qos; 188 189 qos = qos_head; 190 while( qos != NULL ){ 191 if(qos->ipaddr == dst_ip) { 192 break; 193 } 194 qos = qos->next; 195 } 196 197 return qos; 198 } 199 200 /* 201 * Returns 0 for failure 202 */ 203 int atm_mpoa_delete_qos(struct atm_mpoa_qos *entry) 204 { 205 206 struct atm_mpoa_qos *curr; 207 208 if (entry == NULL) return 0; 209 if (entry == qos_head) { 210 qos_head = qos_head->next; 211 kfree(entry); 212 return 1; 213 } 214 215 curr = qos_head; 216 while (curr != NULL) { 217 if (curr->next == entry) { 218 curr->next = entry->next; 219 kfree(entry); 220 return 1; 221 } 222 curr = curr->next; 223 } 224 225 return 0; 226 } 227 228 /* this is buggered - we need locking for qos_head */ 229 void atm_mpoa_disp_qos(struct seq_file *m) 230 { 231 struct atm_mpoa_qos *qos; 232 233 qos = qos_head; 234 seq_printf(m, "QoS entries for shortcuts:\n"); 235 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"); 236 237 while (qos != NULL) { 238 seq_printf(m, "%u.%u.%u.%u\n %-7d %-7d %-7d %-7d %-7d\n %-7d %-7d %-7d %-7d %-7d\n", 239 NIPQUAD(qos->ipaddr), 240 qos->qos.txtp.max_pcr, qos->qos.txtp.pcr, qos->qos.txtp.min_pcr, qos->qos.txtp.max_cdv, qos->qos.txtp.max_sdu, 241 qos->qos.rxtp.max_pcr, qos->qos.rxtp.pcr, qos->qos.rxtp.min_pcr, qos->qos.rxtp.max_cdv, qos->qos.rxtp.max_sdu); 242 qos = qos->next; 243 } 244 } 245 246 static struct net_device *find_lec_by_itfnum(int itf) 247 { 248 struct net_device *dev; 249 char name[IFNAMSIZ]; 250 251 sprintf(name, "lec%d", itf); 252 dev = dev_get_by_name(name); 253 254 return dev; 255 } 256 257 static struct mpoa_client *alloc_mpc(void) 258 { 259 struct mpoa_client *mpc; 260 261 mpc = kzalloc(sizeof (struct mpoa_client), GFP_KERNEL); 262 if (mpc == NULL) 263 return NULL; 264 rwlock_init(&mpc->ingress_lock); 265 rwlock_init(&mpc->egress_lock); 266 mpc->next = mpcs; 267 atm_mpoa_init_cache(mpc); 268 269 mpc->parameters.mpc_p1 = MPC_P1; 270 mpc->parameters.mpc_p2 = MPC_P2; 271 memset(mpc->parameters.mpc_p3,0,sizeof(mpc->parameters.mpc_p3)); 272 mpc->parameters.mpc_p4 = MPC_P4; 273 mpc->parameters.mpc_p5 = MPC_P5; 274 mpc->parameters.mpc_p6 = MPC_P6; 275 276 mpcs = mpc; 277 278 return mpc; 279 } 280 281 /* 282 * 283 * start_mpc() puts the MPC on line. All the packets destined 284 * to the lec underneath us are now being monitored and 285 * shortcuts will be established. 286 * 287 */ 288 static void start_mpc(struct mpoa_client *mpc, struct net_device *dev) 289 { 290 291 dprintk("mpoa: (%s) start_mpc:\n", mpc->dev->name); 292 if (dev->hard_start_xmit == NULL) { 293 printk("mpoa: (%s) start_mpc: dev->hard_start_xmit == NULL, not starting\n", 294 dev->name); 295 return; 296 } 297 mpc->old_hard_start_xmit = dev->hard_start_xmit; 298 dev->hard_start_xmit = mpc_send_packet; 299 300 return; 301 } 302 303 static void stop_mpc(struct mpoa_client *mpc) 304 { 305 306 dprintk("mpoa: (%s) stop_mpc:", mpc->dev->name); 307 308 /* Lets not nullify lec device's dev->hard_start_xmit */ 309 if (mpc->dev->hard_start_xmit != mpc_send_packet) { 310 dprintk(" mpc already stopped, not fatal\n"); 311 return; 312 } 313 dprintk("\n"); 314 mpc->dev->hard_start_xmit = mpc->old_hard_start_xmit; 315 mpc->old_hard_start_xmit = NULL; 316 /* close_shortcuts(mpc); ??? FIXME */ 317 318 return; 319 } 320 321 static const char *mpoa_device_type_string(char type) __attribute__ ((unused)); 322 323 static const char *mpoa_device_type_string(char type) 324 { 325 switch(type) { 326 case NON_MPOA: 327 return "non-MPOA device"; 328 break; 329 case MPS: 330 return "MPS"; 331 break; 332 case MPC: 333 return "MPC"; 334 break; 335 case MPS_AND_MPC: 336 return "both MPS and MPC"; 337 break; 338 default: 339 return "unspecified (non-MPOA) device"; 340 break; 341 } 342 343 return ""; /* not reached */ 344 } 345 346 /* 347 * lec device calls this via its dev->priv->lane2_ops->associate_indicator() 348 * when it sees a TLV in LE_ARP packet. 349 * We fill in the pointer above when we see a LANE2 lec initializing 350 * See LANE2 spec 3.1.5 351 * 352 * Quite a big and ugly function but when you look at it 353 * all it does is to try to locate and parse MPOA Device 354 * Type TLV. 355 * We give our lec a pointer to this function and when the 356 * lec sees a TLV it uses the pointer to call this function. 357 * 358 */ 359 static void lane2_assoc_ind(struct net_device *dev, uint8_t *mac_addr, 360 uint8_t *tlvs, uint32_t sizeoftlvs) 361 { 362 uint32_t type; 363 uint8_t length, mpoa_device_type, number_of_mps_macs; 364 uint8_t *end_of_tlvs; 365 struct mpoa_client *mpc; 366 367 mpoa_device_type = number_of_mps_macs = 0; /* silence gcc */ 368 dprintk("mpoa: (%s) lane2_assoc_ind: received TLV(s), ", dev->name); 369 dprintk("total length of all TLVs %d\n", sizeoftlvs); 370 mpc = find_mpc_by_lec(dev); /* Sampo-Fix: moved here from below */ 371 if (mpc == NULL) { 372 printk("mpoa: (%s) lane2_assoc_ind: no mpc\n", dev->name); 373 return; 374 } 375 end_of_tlvs = tlvs + sizeoftlvs; 376 while (end_of_tlvs - tlvs >= 5) { 377 type = (tlvs[0] << 24) | (tlvs[1] << 16) | (tlvs[2] << 8) | tlvs[3]; 378 length = tlvs[4]; 379 tlvs += 5; 380 dprintk(" type 0x%x length %02x\n", type, length); 381 if (tlvs + length > end_of_tlvs) { 382 printk("TLV value extends past its buffer, aborting parse\n"); 383 return; 384 } 385 386 if (type == 0) { 387 printk("mpoa: (%s) lane2_assoc_ind: TLV type was 0, returning\n", dev->name); 388 return; 389 } 390 391 if (type != TLV_MPOA_DEVICE_TYPE) { 392 tlvs += length; 393 continue; /* skip other TLVs */ 394 } 395 mpoa_device_type = *tlvs++; 396 number_of_mps_macs = *tlvs++; 397 dprintk("mpoa: (%s) MPOA device type '%s', ", dev->name, mpoa_device_type_string(mpoa_device_type)); 398 if (mpoa_device_type == MPS_AND_MPC && 399 length < (42 + number_of_mps_macs*ETH_ALEN)) { /* :) */ 400 printk("\nmpoa: (%s) lane2_assoc_ind: short MPOA Device Type TLV\n", 401 dev->name); 402 continue; 403 } 404 if ((mpoa_device_type == MPS || mpoa_device_type == MPC) 405 && length < 22 + number_of_mps_macs*ETH_ALEN) { 406 printk("\nmpoa: (%s) lane2_assoc_ind: short MPOA Device Type TLV\n", 407 dev->name); 408 continue; 409 } 410 if (mpoa_device_type != MPS && mpoa_device_type != MPS_AND_MPC) { 411 dprintk("ignoring non-MPS device\n"); 412 if (mpoa_device_type == MPC) tlvs += 20; 413 continue; /* we are only interested in MPSs */ 414 } 415 if (number_of_mps_macs == 0 && mpoa_device_type == MPS_AND_MPC) { 416 printk("\nmpoa: (%s) lane2_assoc_ind: MPS_AND_MPC has zero MACs\n", dev->name); 417 continue; /* someone should read the spec */ 418 } 419 dprintk("this MPS has %d MAC addresses\n", number_of_mps_macs); 420 421 /* ok, now we can go and tell our daemon the control address of MPS */ 422 send_set_mps_ctrl_addr(tlvs, mpc); 423 424 tlvs = copy_macs(mpc, mac_addr, tlvs, number_of_mps_macs, mpoa_device_type); 425 if (tlvs == NULL) return; 426 } 427 if (end_of_tlvs - tlvs != 0) 428 printk("mpoa: (%s) lane2_assoc_ind: ignoring %Zd bytes of trailing TLV carbage\n", 429 dev->name, end_of_tlvs - tlvs); 430 return; 431 } 432 433 /* 434 * Store at least advertizing router's MAC address 435 * plus the possible MAC address(es) to mpc->mps_macs. 436 * For a freshly allocated MPOA client mpc->mps_macs == 0. 437 */ 438 static uint8_t *copy_macs(struct mpoa_client *mpc, uint8_t *router_mac, 439 uint8_t *tlvs, uint8_t mps_macs, uint8_t device_type) 440 { 441 int num_macs; 442 num_macs = (mps_macs > 1) ? mps_macs : 1; 443 444 if (mpc->number_of_mps_macs != num_macs) { /* need to reallocate? */ 445 if (mpc->number_of_mps_macs != 0) kfree(mpc->mps_macs); 446 mpc->number_of_mps_macs = 0; 447 mpc->mps_macs = kmalloc(num_macs*ETH_ALEN, GFP_KERNEL); 448 if (mpc->mps_macs == NULL) { 449 printk("mpoa: (%s) copy_macs: out of mem\n", mpc->dev->name); 450 return NULL; 451 } 452 } 453 memcpy(mpc->mps_macs, router_mac, ETH_ALEN); 454 tlvs += 20; if (device_type == MPS_AND_MPC) tlvs += 20; 455 if (mps_macs > 0) 456 memcpy(mpc->mps_macs, tlvs, mps_macs*ETH_ALEN); 457 tlvs += mps_macs*ETH_ALEN; 458 mpc->number_of_mps_macs = num_macs; 459 460 return tlvs; 461 } 462 463 static int send_via_shortcut(struct sk_buff *skb, struct mpoa_client *mpc) 464 { 465 in_cache_entry *entry; 466 struct iphdr *iph; 467 char *buff; 468 uint32_t ipaddr = 0; 469 470 static struct { 471 struct llc_snap_hdr hdr; 472 uint32_t tag; 473 } tagged_llc_snap_hdr = { 474 {0xaa, 0xaa, 0x03, {0x00, 0x00, 0x00}, {0x88, 0x4c}}, 475 0 476 }; 477 478 buff = skb->data + mpc->dev->hard_header_len; 479 iph = (struct iphdr *)buff; 480 ipaddr = iph->daddr; 481 482 ddprintk("mpoa: (%s) send_via_shortcut: ipaddr 0x%x\n", mpc->dev->name, ipaddr); 483 484 entry = mpc->in_ops->get(ipaddr, mpc); 485 if (entry == NULL) { 486 entry = mpc->in_ops->add_entry(ipaddr, mpc); 487 if (entry != NULL) mpc->in_ops->put(entry); 488 return 1; 489 } 490 if (mpc->in_ops->cache_hit(entry, mpc) != OPEN){ /* threshold not exceeded or VCC not ready */ 491 ddprintk("mpoa: (%s) send_via_shortcut: cache_hit: returns != OPEN\n", mpc->dev->name); 492 mpc->in_ops->put(entry); 493 return 1; 494 } 495 496 ddprintk("mpoa: (%s) send_via_shortcut: using shortcut\n", mpc->dev->name); 497 /* MPOA spec A.1.4, MPOA client must decrement IP ttl at least by one */ 498 if (iph->ttl <= 1) { 499 ddprintk("mpoa: (%s) send_via_shortcut: IP ttl = %u, using LANE\n", mpc->dev->name, iph->ttl); 500 mpc->in_ops->put(entry); 501 return 1; 502 } 503 iph->ttl--; 504 iph->check = 0; 505 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl); 506 507 if (entry->ctrl_info.tag != 0) { 508 ddprintk("mpoa: (%s) send_via_shortcut: adding tag 0x%x\n", mpc->dev->name, entry->ctrl_info.tag); 509 tagged_llc_snap_hdr.tag = entry->ctrl_info.tag; 510 skb_pull(skb, ETH_HLEN); /* get rid of Eth header */ 511 skb_push(skb, sizeof(tagged_llc_snap_hdr)); /* add LLC/SNAP header */ 512 memcpy(skb->data, &tagged_llc_snap_hdr, sizeof(tagged_llc_snap_hdr)); 513 } else { 514 skb_pull(skb, ETH_HLEN); /* get rid of Eth header */ 515 skb_push(skb, sizeof(struct llc_snap_hdr)); /* add LLC/SNAP header + tag */ 516 memcpy(skb->data, &llc_snap_mpoa_data, sizeof(struct llc_snap_hdr)); 517 } 518 519 atomic_add(skb->truesize, &sk_atm(entry->shortcut)->sk_wmem_alloc); 520 ATM_SKB(skb)->atm_options = entry->shortcut->atm_options; 521 entry->shortcut->send(entry->shortcut, skb); 522 entry->packets_fwded++; 523 mpc->in_ops->put(entry); 524 525 return 0; 526 } 527 528 /* 529 * Probably needs some error checks and locking, not sure... 530 */ 531 static int mpc_send_packet(struct sk_buff *skb, struct net_device *dev) 532 { 533 int retval; 534 struct mpoa_client *mpc; 535 struct ethhdr *eth; 536 int i = 0; 537 538 mpc = find_mpc_by_lec(dev); /* this should NEVER fail */ 539 if(mpc == NULL) { 540 printk("mpoa: (%s) mpc_send_packet: no MPC found\n", dev->name); 541 goto non_ip; 542 } 543 544 eth = (struct ethhdr *)skb->data; 545 if (eth->h_proto != htons(ETH_P_IP)) 546 goto non_ip; /* Multi-Protocol Over ATM :-) */ 547 548 while (i < mpc->number_of_mps_macs) { 549 if (!compare_ether_addr(eth->h_dest, (mpc->mps_macs + i*ETH_ALEN))) 550 if ( send_via_shortcut(skb, mpc) == 0 ) /* try shortcut */ 551 return 0; /* success! */ 552 i++; 553 } 554 555 non_ip: 556 retval = mpc->old_hard_start_xmit(skb,dev); 557 558 return retval; 559 } 560 561 static int atm_mpoa_vcc_attach(struct atm_vcc *vcc, void __user *arg) 562 { 563 int bytes_left; 564 struct mpoa_client *mpc; 565 struct atmmpc_ioc ioc_data; 566 in_cache_entry *in_entry; 567 uint32_t ipaddr; 568 unsigned char *ip; 569 570 bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmmpc_ioc)); 571 if (bytes_left != 0) { 572 printk("mpoa: mpc_vcc_attach: Short read (missed %d bytes) from userland\n", bytes_left); 573 return -EFAULT; 574 } 575 ipaddr = ioc_data.ipaddr; 576 if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF) 577 return -EINVAL; 578 579 mpc = find_mpc_by_itfnum(ioc_data.dev_num); 580 if (mpc == NULL) 581 return -EINVAL; 582 583 if (ioc_data.type == MPC_SOCKET_INGRESS) { 584 in_entry = mpc->in_ops->get(ipaddr, mpc); 585 if (in_entry == NULL || in_entry->entry_state < INGRESS_RESOLVED) { 586 printk("mpoa: (%s) mpc_vcc_attach: did not find RESOLVED entry from ingress cache\n", 587 mpc->dev->name); 588 if (in_entry != NULL) mpc->in_ops->put(in_entry); 589 return -EINVAL; 590 } 591 ip = (unsigned char*)&in_entry->ctrl_info.in_dst_ip; 592 printk("mpoa: (%s) mpc_vcc_attach: attaching ingress SVC, entry = %u.%u.%u.%u\n", 593 mpc->dev->name, ip[0], ip[1], ip[2], ip[3]); 594 in_entry->shortcut = vcc; 595 mpc->in_ops->put(in_entry); 596 } else { 597 printk("mpoa: (%s) mpc_vcc_attach: attaching egress SVC\n", mpc->dev->name); 598 } 599 600 vcc->proto_data = mpc->dev; 601 vcc->push = mpc_push; 602 603 return 0; 604 } 605 606 /* 607 * 608 */ 609 static void mpc_vcc_close(struct atm_vcc *vcc, struct net_device *dev) 610 { 611 struct mpoa_client *mpc; 612 in_cache_entry *in_entry; 613 eg_cache_entry *eg_entry; 614 615 mpc = find_mpc_by_lec(dev); 616 if (mpc == NULL) { 617 printk("mpoa: (%s) mpc_vcc_close: close for unknown MPC\n", dev->name); 618 return; 619 } 620 621 dprintk("mpoa: (%s) mpc_vcc_close:\n", dev->name); 622 in_entry = mpc->in_ops->get_by_vcc(vcc, mpc); 623 if (in_entry) { 624 unsigned char *ip __attribute__ ((unused)) = 625 (unsigned char *)&in_entry->ctrl_info.in_dst_ip; 626 dprintk("mpoa: (%s) mpc_vcc_close: ingress SVC closed ip = %u.%u.%u.%u\n", 627 mpc->dev->name, ip[0], ip[1], ip[2], ip[3]); 628 in_entry->shortcut = NULL; 629 mpc->in_ops->put(in_entry); 630 } 631 eg_entry = mpc->eg_ops->get_by_vcc(vcc, mpc); 632 if (eg_entry) { 633 dprintk("mpoa: (%s) mpc_vcc_close: egress SVC closed\n", mpc->dev->name); 634 eg_entry->shortcut = NULL; 635 mpc->eg_ops->put(eg_entry); 636 } 637 638 if (in_entry == NULL && eg_entry == NULL) 639 dprintk("mpoa: (%s) mpc_vcc_close: unused vcc closed\n", dev->name); 640 641 return; 642 } 643 644 static void mpc_push(struct atm_vcc *vcc, struct sk_buff *skb) 645 { 646 struct net_device *dev = (struct net_device *)vcc->proto_data; 647 struct sk_buff *new_skb; 648 eg_cache_entry *eg; 649 struct mpoa_client *mpc; 650 uint32_t tag; 651 char *tmp; 652 653 ddprintk("mpoa: (%s) mpc_push:\n", dev->name); 654 if (skb == NULL) { 655 dprintk("mpoa: (%s) mpc_push: null skb, closing VCC\n", dev->name); 656 mpc_vcc_close(vcc, dev); 657 return; 658 } 659 660 skb->dev = dev; 661 if (memcmp(skb->data, &llc_snap_mpoa_ctrl, sizeof(struct llc_snap_hdr)) == 0) { 662 struct sock *sk = sk_atm(vcc); 663 664 dprintk("mpoa: (%s) mpc_push: control packet arrived\n", dev->name); 665 /* Pass control packets to daemon */ 666 skb_queue_tail(&sk->sk_receive_queue, skb); 667 sk->sk_data_ready(sk, skb->len); 668 return; 669 } 670 671 /* data coming over the shortcut */ 672 atm_return(vcc, skb->truesize); 673 674 mpc = find_mpc_by_lec(dev); 675 if (mpc == NULL) { 676 printk("mpoa: (%s) mpc_push: unknown MPC\n", dev->name); 677 return; 678 } 679 680 if (memcmp(skb->data, &llc_snap_mpoa_data_tagged, sizeof(struct llc_snap_hdr)) == 0) { /* MPOA tagged data */ 681 ddprintk("mpoa: (%s) mpc_push: tagged data packet arrived\n", dev->name); 682 683 } else if (memcmp(skb->data, &llc_snap_mpoa_data, sizeof(struct llc_snap_hdr)) == 0) { /* MPOA data */ 684 printk("mpoa: (%s) mpc_push: non-tagged data packet arrived\n", dev->name); 685 printk(" mpc_push: non-tagged data unsupported, purging\n"); 686 dev_kfree_skb_any(skb); 687 return; 688 } else { 689 printk("mpoa: (%s) mpc_push: garbage arrived, purging\n", dev->name); 690 dev_kfree_skb_any(skb); 691 return; 692 } 693 694 tmp = skb->data + sizeof(struct llc_snap_hdr); 695 tag = *(uint32_t *)tmp; 696 697 eg = mpc->eg_ops->get_by_tag(tag, mpc); 698 if (eg == NULL) { 699 printk("mpoa: (%s) mpc_push: Didn't find egress cache entry, tag = %u\n", 700 dev->name,tag); 701 purge_egress_shortcut(vcc, NULL); 702 dev_kfree_skb_any(skb); 703 return; 704 } 705 706 /* 707 * See if ingress MPC is using shortcut we opened as a return channel. 708 * This means we have a bi-directional vcc opened by us. 709 */ 710 if (eg->shortcut == NULL) { 711 eg->shortcut = vcc; 712 printk("mpoa: (%s) mpc_push: egress SVC in use\n", dev->name); 713 } 714 715 skb_pull(skb, sizeof(struct llc_snap_hdr) + sizeof(tag)); /* get rid of LLC/SNAP header */ 716 new_skb = skb_realloc_headroom(skb, eg->ctrl_info.DH_length); /* LLC/SNAP is shorter than MAC header :( */ 717 dev_kfree_skb_any(skb); 718 if (new_skb == NULL){ 719 mpc->eg_ops->put(eg); 720 return; 721 } 722 skb_push(new_skb, eg->ctrl_info.DH_length); /* add MAC header */ 723 memcpy(new_skb->data, eg->ctrl_info.DLL_header, eg->ctrl_info.DH_length); 724 new_skb->protocol = eth_type_trans(new_skb, dev); 725 new_skb->nh.raw = new_skb->data; 726 727 eg->latest_ip_addr = new_skb->nh.iph->saddr; 728 eg->packets_rcvd++; 729 mpc->eg_ops->put(eg); 730 731 memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data)); 732 netif_rx(new_skb); 733 734 return; 735 } 736 737 static struct atmdev_ops mpc_ops = { /* only send is required */ 738 .close = mpoad_close, 739 .send = msg_from_mpoad 740 }; 741 742 static struct atm_dev mpc_dev = { 743 .ops = &mpc_ops, 744 .type = "mpc", 745 .number = 42, 746 .lock = SPIN_LOCK_UNLOCKED 747 /* members not explicitly initialised will be 0 */ 748 }; 749 750 static int atm_mpoa_mpoad_attach (struct atm_vcc *vcc, int arg) 751 { 752 struct mpoa_client *mpc; 753 struct lec_priv *priv; 754 int err; 755 756 if (mpcs == NULL) { 757 init_timer(&mpc_timer); 758 mpc_timer_refresh(); 759 760 /* This lets us now how our LECs are doing */ 761 err = register_netdevice_notifier(&mpoa_notifier); 762 if (err < 0) { 763 del_timer(&mpc_timer); 764 return err; 765 } 766 } 767 768 mpc = find_mpc_by_itfnum(arg); 769 if (mpc == NULL) { 770 dprintk("mpoa: mpoad_attach: allocating new mpc for itf %d\n", arg); 771 mpc = alloc_mpc(); 772 if (mpc == NULL) 773 return -ENOMEM; 774 mpc->dev_num = arg; 775 mpc->dev = find_lec_by_itfnum(arg); /* NULL if there was no lec */ 776 } 777 if (mpc->mpoad_vcc) { 778 printk("mpoa: mpoad_attach: mpoad is already present for itf %d\n", arg); 779 return -EADDRINUSE; 780 } 781 782 if (mpc->dev) { /* check if the lec is LANE2 capable */ 783 priv = (struct lec_priv *)mpc->dev->priv; 784 if (priv->lane_version < 2) { 785 dev_put(mpc->dev); 786 mpc->dev = NULL; 787 } else 788 priv->lane2_ops->associate_indicator = lane2_assoc_ind; 789 } 790 791 mpc->mpoad_vcc = vcc; 792 vcc->dev = &mpc_dev; 793 vcc_insert_socket(sk_atm(vcc)); 794 set_bit(ATM_VF_META,&vcc->flags); 795 set_bit(ATM_VF_READY,&vcc->flags); 796 797 if (mpc->dev) { 798 char empty[ATM_ESA_LEN]; 799 memset(empty, 0, ATM_ESA_LEN); 800 801 start_mpc(mpc, mpc->dev); 802 /* set address if mpcd e.g. gets killed and restarted. 803 * If we do not do it now we have to wait for the next LE_ARP 804 */ 805 if ( memcmp(mpc->mps_ctrl_addr, empty, ATM_ESA_LEN) != 0 ) 806 send_set_mps_ctrl_addr(mpc->mps_ctrl_addr, mpc); 807 } 808 809 __module_get(THIS_MODULE); 810 return arg; 811 } 812 813 static void send_set_mps_ctrl_addr(char *addr, struct mpoa_client *mpc) 814 { 815 struct k_message mesg; 816 817 memcpy (mpc->mps_ctrl_addr, addr, ATM_ESA_LEN); 818 819 mesg.type = SET_MPS_CTRL_ADDR; 820 memcpy(mesg.MPS_ctrl, addr, ATM_ESA_LEN); 821 msg_to_mpoad(&mesg, mpc); 822 823 return; 824 } 825 826 static void mpoad_close(struct atm_vcc *vcc) 827 { 828 struct mpoa_client *mpc; 829 struct sk_buff *skb; 830 831 mpc = find_mpc_by_vcc(vcc); 832 if (mpc == NULL) { 833 printk("mpoa: mpoad_close: did not find MPC\n"); 834 return; 835 } 836 if (!mpc->mpoad_vcc) { 837 printk("mpoa: mpoad_close: close for non-present mpoad\n"); 838 return; 839 } 840 841 mpc->mpoad_vcc = NULL; 842 if (mpc->dev) { 843 struct lec_priv *priv = (struct lec_priv *)mpc->dev->priv; 844 priv->lane2_ops->associate_indicator = NULL; 845 stop_mpc(mpc); 846 dev_put(mpc->dev); 847 } 848 849 mpc->in_ops->destroy_cache(mpc); 850 mpc->eg_ops->destroy_cache(mpc); 851 852 while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue))) { 853 atm_return(vcc, skb->truesize); 854 kfree_skb(skb); 855 } 856 857 printk("mpoa: (%s) going down\n", 858 (mpc->dev) ? mpc->dev->name : "<unknown>"); 859 module_put(THIS_MODULE); 860 861 return; 862 } 863 864 /* 865 * 866 */ 867 static int msg_from_mpoad(struct atm_vcc *vcc, struct sk_buff *skb) 868 { 869 870 struct mpoa_client *mpc = find_mpc_by_vcc(vcc); 871 struct k_message *mesg = (struct k_message*)skb->data; 872 atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); 873 874 if (mpc == NULL) { 875 printk("mpoa: msg_from_mpoad: no mpc found\n"); 876 return 0; 877 } 878 dprintk("mpoa: (%s) msg_from_mpoad:", (mpc->dev) ? mpc->dev->name : "<unknown>"); 879 switch(mesg->type) { 880 case MPOA_RES_REPLY_RCVD: 881 dprintk(" mpoa_res_reply_rcvd\n"); 882 MPOA_res_reply_rcvd(mesg, mpc); 883 break; 884 case MPOA_TRIGGER_RCVD: 885 dprintk(" mpoa_trigger_rcvd\n"); 886 MPOA_trigger_rcvd(mesg, mpc); 887 break; 888 case INGRESS_PURGE_RCVD: 889 dprintk(" nhrp_purge_rcvd\n"); 890 ingress_purge_rcvd(mesg, mpc); 891 break; 892 case EGRESS_PURGE_RCVD: 893 dprintk(" egress_purge_reply_rcvd\n"); 894 egress_purge_rcvd(mesg, mpc); 895 break; 896 case MPS_DEATH: 897 dprintk(" mps_death\n"); 898 mps_death(mesg, mpc); 899 break; 900 case CACHE_IMPOS_RCVD: 901 dprintk(" cache_impos_rcvd\n"); 902 MPOA_cache_impos_rcvd(mesg, mpc); 903 break; 904 case SET_MPC_CTRL_ADDR: 905 dprintk(" set_mpc_ctrl_addr\n"); 906 set_mpc_ctrl_addr_rcvd(mesg, mpc); 907 break; 908 case SET_MPS_MAC_ADDR: 909 dprintk(" set_mps_mac_addr\n"); 910 set_mps_mac_addr_rcvd(mesg, mpc); 911 break; 912 case CLEAN_UP_AND_EXIT: 913 dprintk(" clean_up_and_exit\n"); 914 clean_up(mesg, mpc, DIE); 915 break; 916 case RELOAD: 917 dprintk(" reload\n"); 918 clean_up(mesg, mpc, RELOAD); 919 break; 920 case SET_MPC_PARAMS: 921 dprintk(" set_mpc_params\n"); 922 mpc->parameters = mesg->content.params; 923 break; 924 default: 925 dprintk(" unknown message %d\n", mesg->type); 926 break; 927 } 928 kfree_skb(skb); 929 930 return 0; 931 } 932 933 /* Remember that this function may not do things that sleep */ 934 int msg_to_mpoad(struct k_message *mesg, struct mpoa_client *mpc) 935 { 936 struct sk_buff *skb; 937 struct sock *sk; 938 939 if (mpc == NULL || !mpc->mpoad_vcc) { 940 printk("mpoa: msg_to_mpoad: mesg %d to a non-existent mpoad\n", mesg->type); 941 return -ENXIO; 942 } 943 944 skb = alloc_skb(sizeof(struct k_message), GFP_ATOMIC); 945 if (skb == NULL) 946 return -ENOMEM; 947 skb_put(skb, sizeof(struct k_message)); 948 memcpy(skb->data, mesg, sizeof(struct k_message)); 949 atm_force_charge(mpc->mpoad_vcc, skb->truesize); 950 951 sk = sk_atm(mpc->mpoad_vcc); 952 skb_queue_tail(&sk->sk_receive_queue, skb); 953 sk->sk_data_ready(sk, skb->len); 954 955 return 0; 956 } 957 958 static int mpoa_event_listener(struct notifier_block *mpoa_notifier, unsigned long event, void *dev_ptr) 959 { 960 struct net_device *dev; 961 struct mpoa_client *mpc; 962 struct lec_priv *priv; 963 964 dev = (struct net_device *)dev_ptr; 965 if (dev->name == NULL || strncmp(dev->name, "lec", 3)) 966 return NOTIFY_DONE; /* we are only interested in lec:s */ 967 968 switch (event) { 969 case NETDEV_REGISTER: /* a new lec device was allocated */ 970 priv = (struct lec_priv *)dev->priv; 971 if (priv->lane_version < 2) 972 break; 973 priv->lane2_ops->associate_indicator = lane2_assoc_ind; 974 mpc = find_mpc_by_itfnum(priv->itfnum); 975 if (mpc == NULL) { 976 dprintk("mpoa: mpoa_event_listener: allocating new mpc for %s\n", 977 dev->name); 978 mpc = alloc_mpc(); 979 if (mpc == NULL) { 980 printk("mpoa: mpoa_event_listener: no new mpc"); 981 break; 982 } 983 } 984 mpc->dev_num = priv->itfnum; 985 mpc->dev = dev; 986 dev_hold(dev); 987 dprintk("mpoa: (%s) was initialized\n", dev->name); 988 break; 989 case NETDEV_UNREGISTER: 990 /* the lec device was deallocated */ 991 mpc = find_mpc_by_lec(dev); 992 if (mpc == NULL) 993 break; 994 dprintk("mpoa: device (%s) was deallocated\n", dev->name); 995 stop_mpc(mpc); 996 dev_put(mpc->dev); 997 mpc->dev = NULL; 998 break; 999 case NETDEV_UP: 1000 /* the dev was ifconfig'ed up */ 1001 mpc = find_mpc_by_lec(dev); 1002 if (mpc == NULL) 1003 break; 1004 if (mpc->mpoad_vcc != NULL) { 1005 start_mpc(mpc, dev); 1006 } 1007 break; 1008 case NETDEV_DOWN: 1009 /* the dev was ifconfig'ed down */ 1010 /* this means that the flow of packets from the 1011 * upper layer stops 1012 */ 1013 mpc = find_mpc_by_lec(dev); 1014 if (mpc == NULL) 1015 break; 1016 if (mpc->mpoad_vcc != NULL) { 1017 stop_mpc(mpc); 1018 } 1019 break; 1020 case NETDEV_REBOOT: 1021 case NETDEV_CHANGE: 1022 case NETDEV_CHANGEMTU: 1023 case NETDEV_CHANGEADDR: 1024 case NETDEV_GOING_DOWN: 1025 break; 1026 default: 1027 break; 1028 } 1029 1030 return NOTIFY_DONE; 1031 } 1032 1033 /* 1034 * Functions which are called after a message is received from mpcd. 1035 * Msg is reused on purpose. 1036 */ 1037 1038 1039 static void MPOA_trigger_rcvd(struct k_message *msg, struct mpoa_client *mpc) 1040 { 1041 uint32_t dst_ip = msg->content.in_info.in_dst_ip; 1042 in_cache_entry *entry; 1043 1044 entry = mpc->in_ops->get(dst_ip, mpc); 1045 if(entry == NULL){ 1046 entry = mpc->in_ops->add_entry(dst_ip, mpc); 1047 entry->entry_state = INGRESS_RESOLVING; 1048 msg->type = SND_MPOA_RES_RQST; 1049 msg->content.in_info = entry->ctrl_info; 1050 msg_to_mpoad(msg, mpc); 1051 do_gettimeofday(&(entry->reply_wait)); 1052 mpc->in_ops->put(entry); 1053 return; 1054 } 1055 1056 if(entry->entry_state == INGRESS_INVALID){ 1057 entry->entry_state = INGRESS_RESOLVING; 1058 msg->type = SND_MPOA_RES_RQST; 1059 msg->content.in_info = entry->ctrl_info; 1060 msg_to_mpoad(msg, mpc); 1061 do_gettimeofday(&(entry->reply_wait)); 1062 mpc->in_ops->put(entry); 1063 return; 1064 } 1065 1066 printk("mpoa: (%s) MPOA_trigger_rcvd: entry already in resolving state\n", 1067 (mpc->dev) ? mpc->dev->name : "<unknown>"); 1068 mpc->in_ops->put(entry); 1069 return; 1070 } 1071 1072 /* 1073 * Things get complicated because we have to check if there's an egress 1074 * shortcut with suitable traffic parameters we could use. 1075 */ 1076 static void check_qos_and_open_shortcut(struct k_message *msg, struct mpoa_client *client, in_cache_entry *entry) 1077 { 1078 uint32_t dst_ip = msg->content.in_info.in_dst_ip; 1079 struct atm_mpoa_qos *qos = atm_mpoa_search_qos(dst_ip); 1080 eg_cache_entry *eg_entry = client->eg_ops->get_by_src_ip(dst_ip, client); 1081 1082 if(eg_entry && eg_entry->shortcut){ 1083 if(eg_entry->shortcut->qos.txtp.traffic_class & 1084 msg->qos.txtp.traffic_class & 1085 (qos ? qos->qos.txtp.traffic_class : ATM_UBR | ATM_CBR)){ 1086 if(eg_entry->shortcut->qos.txtp.traffic_class == ATM_UBR) 1087 entry->shortcut = eg_entry->shortcut; 1088 else if(eg_entry->shortcut->qos.txtp.max_pcr > 0) 1089 entry->shortcut = eg_entry->shortcut; 1090 } 1091 if(entry->shortcut){ 1092 dprintk("mpoa: (%s) using egress SVC to reach %u.%u.%u.%u\n",client->dev->name, NIPQUAD(dst_ip)); 1093 client->eg_ops->put(eg_entry); 1094 return; 1095 } 1096 } 1097 if (eg_entry != NULL) 1098 client->eg_ops->put(eg_entry); 1099 1100 /* No luck in the egress cache we must open an ingress SVC */ 1101 msg->type = OPEN_INGRESS_SVC; 1102 if (qos && (qos->qos.txtp.traffic_class == msg->qos.txtp.traffic_class)) 1103 { 1104 msg->qos = qos->qos; 1105 printk("mpoa: (%s) trying to get a CBR shortcut\n",client->dev->name); 1106 } 1107 else memset(&msg->qos,0,sizeof(struct atm_qos)); 1108 msg_to_mpoad(msg, client); 1109 return; 1110 } 1111 1112 static void MPOA_res_reply_rcvd(struct k_message *msg, struct mpoa_client *mpc) 1113 { 1114 uint32_t dst_ip = msg->content.in_info.in_dst_ip; 1115 in_cache_entry *entry = mpc->in_ops->get(dst_ip, mpc); 1116 1117 dprintk("mpoa: (%s) MPOA_res_reply_rcvd: ip %u.%u.%u.%u\n", mpc->dev->name, NIPQUAD(dst_ip)); 1118 ddprintk("mpoa: (%s) MPOA_res_reply_rcvd() entry = %p", mpc->dev->name, entry); 1119 if(entry == NULL){ 1120 printk("\nmpoa: (%s) ARGH, received res. reply for an entry that doesn't exist.\n", mpc->dev->name); 1121 return; 1122 } 1123 ddprintk(" entry_state = %d ", entry->entry_state); 1124 1125 if (entry->entry_state == INGRESS_RESOLVED) { 1126 printk("\nmpoa: (%s) MPOA_res_reply_rcvd for RESOLVED entry!\n", mpc->dev->name); 1127 mpc->in_ops->put(entry); 1128 return; 1129 } 1130 1131 entry->ctrl_info = msg->content.in_info; 1132 do_gettimeofday(&(entry->tv)); 1133 do_gettimeofday(&(entry->reply_wait)); /* Used in refreshing func from now on */ 1134 entry->refresh_time = 0; 1135 ddprintk("entry->shortcut = %p\n", entry->shortcut); 1136 1137 if(entry->entry_state == INGRESS_RESOLVING && entry->shortcut != NULL){ 1138 entry->entry_state = INGRESS_RESOLVED; 1139 mpc->in_ops->put(entry); 1140 return; /* Shortcut already open... */ 1141 } 1142 1143 if (entry->shortcut != NULL) { 1144 printk("mpoa: (%s) MPOA_res_reply_rcvd: entry->shortcut != NULL, impossible!\n", 1145 mpc->dev->name); 1146 mpc->in_ops->put(entry); 1147 return; 1148 } 1149 1150 check_qos_and_open_shortcut(msg, mpc, entry); 1151 entry->entry_state = INGRESS_RESOLVED; 1152 mpc->in_ops->put(entry); 1153 1154 return; 1155 1156 } 1157 1158 static void ingress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc) 1159 { 1160 uint32_t dst_ip = msg->content.in_info.in_dst_ip; 1161 uint32_t mask = msg->ip_mask; 1162 unsigned char *ip = (unsigned char *)&dst_ip; 1163 in_cache_entry *entry = mpc->in_ops->get_with_mask(dst_ip, mpc, mask); 1164 1165 if(entry == NULL){ 1166 printk("mpoa: (%s) ingress_purge_rcvd: purge for a non-existing entry, ", mpc->dev->name); 1167 printk("ip = %u.%u.%u.%u\n", ip[0], ip[1], ip[2], ip[3]); 1168 return; 1169 } 1170 1171 do { 1172 dprintk("mpoa: (%s) ingress_purge_rcvd: removing an ingress entry, ip = %u.%u.%u.%u\n" , 1173 mpc->dev->name, ip[0], ip[1], ip[2], ip[3]); 1174 write_lock_bh(&mpc->ingress_lock); 1175 mpc->in_ops->remove_entry(entry, mpc); 1176 write_unlock_bh(&mpc->ingress_lock); 1177 mpc->in_ops->put(entry); 1178 entry = mpc->in_ops->get_with_mask(dst_ip, mpc, mask); 1179 } while (entry != NULL); 1180 1181 return; 1182 } 1183 1184 static void egress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc) 1185 { 1186 uint32_t cache_id = msg->content.eg_info.cache_id; 1187 eg_cache_entry *entry = mpc->eg_ops->get_by_cache_id(cache_id, mpc); 1188 1189 if (entry == NULL) { 1190 dprintk("mpoa: (%s) egress_purge_rcvd: purge for a non-existing entry\n", mpc->dev->name); 1191 return; 1192 } 1193 1194 write_lock_irq(&mpc->egress_lock); 1195 mpc->eg_ops->remove_entry(entry, mpc); 1196 write_unlock_irq(&mpc->egress_lock); 1197 1198 mpc->eg_ops->put(entry); 1199 1200 return; 1201 } 1202 1203 static void purge_egress_shortcut(struct atm_vcc *vcc, eg_cache_entry *entry) 1204 { 1205 struct sock *sk; 1206 struct k_message *purge_msg; 1207 struct sk_buff *skb; 1208 1209 dprintk("mpoa: purge_egress_shortcut: entering\n"); 1210 if (vcc == NULL) { 1211 printk("mpoa: purge_egress_shortcut: vcc == NULL\n"); 1212 return; 1213 } 1214 1215 skb = alloc_skb(sizeof(struct k_message), GFP_ATOMIC); 1216 if (skb == NULL) { 1217 printk("mpoa: purge_egress_shortcut: out of memory\n"); 1218 return; 1219 } 1220 1221 skb_put(skb, sizeof(struct k_message)); 1222 memset(skb->data, 0, sizeof(struct k_message)); 1223 purge_msg = (struct k_message *)skb->data; 1224 purge_msg->type = DATA_PLANE_PURGE; 1225 if (entry != NULL) 1226 purge_msg->content.eg_info = entry->ctrl_info; 1227 1228 atm_force_charge(vcc, skb->truesize); 1229 1230 sk = sk_atm(vcc); 1231 skb_queue_tail(&sk->sk_receive_queue, skb); 1232 sk->sk_data_ready(sk, skb->len); 1233 dprintk("mpoa: purge_egress_shortcut: exiting:\n"); 1234 1235 return; 1236 } 1237 1238 /* 1239 * Our MPS died. Tell our daemon to send NHRP data plane purge to each 1240 * of the egress shortcuts we have. 1241 */ 1242 static void mps_death( struct k_message * msg, struct mpoa_client * mpc ) 1243 { 1244 eg_cache_entry *entry; 1245 1246 dprintk("mpoa: (%s) mps_death:\n", mpc->dev->name); 1247 1248 if(memcmp(msg->MPS_ctrl, mpc->mps_ctrl_addr, ATM_ESA_LEN)){ 1249 printk("mpoa: (%s) mps_death: wrong MPS\n", mpc->dev->name); 1250 return; 1251 } 1252 1253 /* FIXME: This knows too much of the cache structure */ 1254 read_lock_irq(&mpc->egress_lock); 1255 entry = mpc->eg_cache; 1256 while (entry != NULL) { 1257 purge_egress_shortcut(entry->shortcut, entry); 1258 entry = entry->next; 1259 } 1260 read_unlock_irq(&mpc->egress_lock); 1261 1262 mpc->in_ops->destroy_cache(mpc); 1263 mpc->eg_ops->destroy_cache(mpc); 1264 1265 return; 1266 } 1267 1268 static void MPOA_cache_impos_rcvd( struct k_message * msg, struct mpoa_client * mpc) 1269 { 1270 uint16_t holding_time; 1271 eg_cache_entry *entry = mpc->eg_ops->get_by_cache_id(msg->content.eg_info.cache_id, mpc); 1272 1273 holding_time = msg->content.eg_info.holding_time; 1274 dprintk("mpoa: (%s) MPOA_cache_impos_rcvd: entry = %p, holding_time = %u\n", 1275 mpc->dev->name, entry, holding_time); 1276 if(entry == NULL && holding_time) { 1277 entry = mpc->eg_ops->add_entry(msg, mpc); 1278 mpc->eg_ops->put(entry); 1279 return; 1280 } 1281 if(holding_time){ 1282 mpc->eg_ops->update(entry, holding_time); 1283 return; 1284 } 1285 1286 write_lock_irq(&mpc->egress_lock); 1287 mpc->eg_ops->remove_entry(entry, mpc); 1288 write_unlock_irq(&mpc->egress_lock); 1289 1290 mpc->eg_ops->put(entry); 1291 1292 return; 1293 } 1294 1295 static void set_mpc_ctrl_addr_rcvd(struct k_message *mesg, struct mpoa_client *mpc) 1296 { 1297 struct lec_priv *priv; 1298 int i, retval ; 1299 1300 uint8_t tlv[4 + 1 + 1 + 1 + ATM_ESA_LEN]; 1301 1302 tlv[0] = 00; tlv[1] = 0xa0; tlv[2] = 0x3e; tlv[3] = 0x2a; /* type */ 1303 tlv[4] = 1 + 1 + ATM_ESA_LEN; /* length */ 1304 tlv[5] = 0x02; /* MPOA client */ 1305 tlv[6] = 0x00; /* number of MPS MAC addresses */ 1306 1307 memcpy(&tlv[7], mesg->MPS_ctrl, ATM_ESA_LEN); /* MPC ctrl ATM addr */ 1308 memcpy(mpc->our_ctrl_addr, mesg->MPS_ctrl, ATM_ESA_LEN); 1309 1310 dprintk("mpoa: (%s) setting MPC ctrl ATM address to ", 1311 (mpc->dev) ? mpc->dev->name : "<unknown>"); 1312 for (i = 7; i < sizeof(tlv); i++) 1313 dprintk("%02x ", tlv[i]); 1314 dprintk("\n"); 1315 1316 if (mpc->dev) { 1317 priv = (struct lec_priv *)mpc->dev->priv; 1318 retval = priv->lane2_ops->associate_req(mpc->dev, mpc->dev->dev_addr, tlv, sizeof(tlv)); 1319 if (retval == 0) 1320 printk("mpoa: (%s) MPOA device type TLV association failed\n", mpc->dev->name); 1321 retval = priv->lane2_ops->resolve(mpc->dev, NULL, 1, NULL, NULL); 1322 if (retval < 0) 1323 printk("mpoa: (%s) targetless LE_ARP request failed\n", mpc->dev->name); 1324 } 1325 1326 return; 1327 } 1328 1329 static void set_mps_mac_addr_rcvd(struct k_message *msg, struct mpoa_client *client) 1330 { 1331 1332 if(client->number_of_mps_macs) 1333 kfree(client->mps_macs); 1334 client->number_of_mps_macs = 0; 1335 client->mps_macs = kmalloc(ETH_ALEN,GFP_KERNEL); 1336 if (client->mps_macs == NULL) { 1337 printk("mpoa: set_mps_mac_addr_rcvd: out of memory\n"); 1338 return; 1339 } 1340 client->number_of_mps_macs = 1; 1341 memcpy(client->mps_macs, msg->MPS_ctrl, ETH_ALEN); 1342 1343 return; 1344 } 1345 1346 /* 1347 * purge egress cache and tell daemon to 'action' (DIE, RELOAD) 1348 */ 1349 static void clean_up(struct k_message *msg, struct mpoa_client *mpc, int action) 1350 { 1351 1352 eg_cache_entry *entry; 1353 msg->type = SND_EGRESS_PURGE; 1354 1355 1356 /* FIXME: This knows too much of the cache structure */ 1357 read_lock_irq(&mpc->egress_lock); 1358 entry = mpc->eg_cache; 1359 while (entry != NULL){ 1360 msg->content.eg_info = entry->ctrl_info; 1361 dprintk("mpoa: cache_id %u\n", entry->ctrl_info.cache_id); 1362 msg_to_mpoad(msg, mpc); 1363 entry = entry->next; 1364 } 1365 read_unlock_irq(&mpc->egress_lock); 1366 1367 msg->type = action; 1368 msg_to_mpoad(msg, mpc); 1369 return; 1370 } 1371 1372 static void mpc_timer_refresh(void) 1373 { 1374 mpc_timer.expires = jiffies + (MPC_P2 * HZ); 1375 mpc_timer.data = mpc_timer.expires; 1376 mpc_timer.function = mpc_cache_check; 1377 add_timer(&mpc_timer); 1378 1379 return; 1380 } 1381 1382 static void mpc_cache_check( unsigned long checking_time ) 1383 { 1384 struct mpoa_client *mpc = mpcs; 1385 static unsigned long previous_resolving_check_time; 1386 static unsigned long previous_refresh_time; 1387 1388 while( mpc != NULL ){ 1389 mpc->in_ops->clear_count(mpc); 1390 mpc->eg_ops->clear_expired(mpc); 1391 if(checking_time - previous_resolving_check_time > mpc->parameters.mpc_p4 * HZ ){ 1392 mpc->in_ops->check_resolving(mpc); 1393 previous_resolving_check_time = checking_time; 1394 } 1395 if(checking_time - previous_refresh_time > mpc->parameters.mpc_p5 * HZ ){ 1396 mpc->in_ops->refresh(mpc); 1397 previous_refresh_time = checking_time; 1398 } 1399 mpc = mpc->next; 1400 } 1401 mpc_timer_refresh(); 1402 1403 return; 1404 } 1405 1406 static int atm_mpoa_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 1407 { 1408 int err = 0; 1409 struct atm_vcc *vcc = ATM_SD(sock); 1410 1411 if (cmd != ATMMPC_CTRL && cmd != ATMMPC_DATA) 1412 return -ENOIOCTLCMD; 1413 1414 if (!capable(CAP_NET_ADMIN)) 1415 return -EPERM; 1416 1417 switch (cmd) { 1418 case ATMMPC_CTRL: 1419 err = atm_mpoa_mpoad_attach(vcc, (int)arg); 1420 if (err >= 0) 1421 sock->state = SS_CONNECTED; 1422 break; 1423 case ATMMPC_DATA: 1424 err = atm_mpoa_vcc_attach(vcc, (void __user *)arg); 1425 break; 1426 default: 1427 break; 1428 } 1429 return err; 1430 } 1431 1432 1433 static struct atm_ioctl atm_ioctl_ops = { 1434 .owner = THIS_MODULE, 1435 .ioctl = atm_mpoa_ioctl, 1436 }; 1437 1438 static __init int atm_mpoa_init(void) 1439 { 1440 register_atm_ioctl(&atm_ioctl_ops); 1441 1442 #ifdef CONFIG_PROC_FS 1443 if (mpc_proc_init() != 0) 1444 printk(KERN_INFO "mpoa: failed to initialize /proc/mpoa\n"); 1445 else 1446 printk(KERN_INFO "mpoa: /proc/mpoa initialized\n"); 1447 #endif 1448 1449 printk("mpc.c: " __DATE__ " " __TIME__ " initialized\n"); 1450 1451 return 0; 1452 } 1453 1454 static void __exit atm_mpoa_cleanup(void) 1455 { 1456 struct mpoa_client *mpc, *tmp; 1457 struct atm_mpoa_qos *qos, *nextqos; 1458 struct lec_priv *priv; 1459 1460 #ifdef CONFIG_PROC_FS 1461 mpc_proc_clean(); 1462 #endif 1463 1464 del_timer(&mpc_timer); 1465 unregister_netdevice_notifier(&mpoa_notifier); 1466 deregister_atm_ioctl(&atm_ioctl_ops); 1467 1468 mpc = mpcs; 1469 mpcs = NULL; 1470 while (mpc != NULL) { 1471 tmp = mpc->next; 1472 if (mpc->dev != NULL) { 1473 stop_mpc(mpc); 1474 priv = (struct lec_priv *)mpc->dev->priv; 1475 if (priv->lane2_ops != NULL) 1476 priv->lane2_ops->associate_indicator = NULL; 1477 } 1478 ddprintk("mpoa: cleanup_module: about to clear caches\n"); 1479 mpc->in_ops->destroy_cache(mpc); 1480 mpc->eg_ops->destroy_cache(mpc); 1481 ddprintk("mpoa: cleanup_module: caches cleared\n"); 1482 kfree(mpc->mps_macs); 1483 memset(mpc, 0, sizeof(struct mpoa_client)); 1484 ddprintk("mpoa: cleanup_module: about to kfree %p\n", mpc); 1485 kfree(mpc); 1486 ddprintk("mpoa: cleanup_module: next mpc is at %p\n", tmp); 1487 mpc = tmp; 1488 } 1489 1490 qos = qos_head; 1491 qos_head = NULL; 1492 while (qos != NULL) { 1493 nextqos = qos->next; 1494 dprintk("mpoa: cleanup_module: freeing qos entry %p\n", qos); 1495 kfree(qos); 1496 qos = nextqos; 1497 } 1498 1499 return; 1500 } 1501 1502 module_init(atm_mpoa_init); 1503 module_exit(atm_mpoa_cleanup); 1504 1505 MODULE_LICENSE("GPL"); 1506