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 = kmalloc(sizeof (struct mpoa_client), GFP_KERNEL); 262 if (mpc == NULL) 263 return NULL; 264 memset(mpc, 0, sizeof(struct mpoa_client)); 265 rwlock_init(&mpc->ingress_lock); 266 rwlock_init(&mpc->egress_lock); 267 mpc->next = mpcs; 268 atm_mpoa_init_cache(mpc); 269 270 mpc->parameters.mpc_p1 = MPC_P1; 271 mpc->parameters.mpc_p2 = MPC_P2; 272 memset(mpc->parameters.mpc_p3,0,sizeof(mpc->parameters.mpc_p3)); 273 mpc->parameters.mpc_p4 = MPC_P4; 274 mpc->parameters.mpc_p5 = MPC_P5; 275 mpc->parameters.mpc_p6 = MPC_P6; 276 277 mpcs = mpc; 278 279 return mpc; 280 } 281 282 /* 283 * 284 * start_mpc() puts the MPC on line. All the packets destined 285 * to the lec underneath us are now being monitored and 286 * shortcuts will be established. 287 * 288 */ 289 static void start_mpc(struct mpoa_client *mpc, struct net_device *dev) 290 { 291 292 dprintk("mpoa: (%s) start_mpc:\n", mpc->dev->name); 293 if (dev->hard_start_xmit == NULL) { 294 printk("mpoa: (%s) start_mpc: dev->hard_start_xmit == NULL, not starting\n", 295 dev->name); 296 return; 297 } 298 mpc->old_hard_start_xmit = dev->hard_start_xmit; 299 dev->hard_start_xmit = mpc_send_packet; 300 301 return; 302 } 303 304 static void stop_mpc(struct mpoa_client *mpc) 305 { 306 307 dprintk("mpoa: (%s) stop_mpc:", mpc->dev->name); 308 309 /* Lets not nullify lec device's dev->hard_start_xmit */ 310 if (mpc->dev->hard_start_xmit != mpc_send_packet) { 311 dprintk(" mpc already stopped, not fatal\n"); 312 return; 313 } 314 dprintk("\n"); 315 mpc->dev->hard_start_xmit = mpc->old_hard_start_xmit; 316 mpc->old_hard_start_xmit = NULL; 317 /* close_shortcuts(mpc); ??? FIXME */ 318 319 return; 320 } 321 322 static const char *mpoa_device_type_string(char type) __attribute__ ((unused)); 323 324 static const char *mpoa_device_type_string(char type) 325 { 326 switch(type) { 327 case NON_MPOA: 328 return "non-MPOA device"; 329 break; 330 case MPS: 331 return "MPS"; 332 break; 333 case MPC: 334 return "MPC"; 335 break; 336 case MPS_AND_MPC: 337 return "both MPS and MPC"; 338 break; 339 default: 340 return "unspecified (non-MPOA) device"; 341 break; 342 } 343 344 return ""; /* not reached */ 345 } 346 347 /* 348 * lec device calls this via its dev->priv->lane2_ops->associate_indicator() 349 * when it sees a TLV in LE_ARP packet. 350 * We fill in the pointer above when we see a LANE2 lec initializing 351 * See LANE2 spec 3.1.5 352 * 353 * Quite a big and ugly function but when you look at it 354 * all it does is to try to locate and parse MPOA Device 355 * Type TLV. 356 * We give our lec a pointer to this function and when the 357 * lec sees a TLV it uses the pointer to call this function. 358 * 359 */ 360 static void lane2_assoc_ind(struct net_device *dev, uint8_t *mac_addr, 361 uint8_t *tlvs, uint32_t sizeoftlvs) 362 { 363 uint32_t type; 364 uint8_t length, mpoa_device_type, number_of_mps_macs; 365 uint8_t *end_of_tlvs; 366 struct mpoa_client *mpc; 367 368 mpoa_device_type = number_of_mps_macs = 0; /* silence gcc */ 369 dprintk("mpoa: (%s) lane2_assoc_ind: received TLV(s), ", dev->name); 370 dprintk("total length of all TLVs %d\n", sizeoftlvs); 371 mpc = find_mpc_by_lec(dev); /* Sampo-Fix: moved here from below */ 372 if (mpc == NULL) { 373 printk("mpoa: (%s) lane2_assoc_ind: no mpc\n", dev->name); 374 return; 375 } 376 end_of_tlvs = tlvs + sizeoftlvs; 377 while (end_of_tlvs - tlvs >= 5) { 378 type = (tlvs[0] << 24) | (tlvs[1] << 16) | (tlvs[2] << 8) | tlvs[3]; 379 length = tlvs[4]; 380 tlvs += 5; 381 dprintk(" type 0x%x length %02x\n", type, length); 382 if (tlvs + length > end_of_tlvs) { 383 printk("TLV value extends past its buffer, aborting parse\n"); 384 return; 385 } 386 387 if (type == 0) { 388 printk("mpoa: (%s) lane2_assoc_ind: TLV type was 0, returning\n", dev->name); 389 return; 390 } 391 392 if (type != TLV_MPOA_DEVICE_TYPE) { 393 tlvs += length; 394 continue; /* skip other TLVs */ 395 } 396 mpoa_device_type = *tlvs++; 397 number_of_mps_macs = *tlvs++; 398 dprintk("mpoa: (%s) MPOA device type '%s', ", dev->name, mpoa_device_type_string(mpoa_device_type)); 399 if (mpoa_device_type == MPS_AND_MPC && 400 length < (42 + number_of_mps_macs*ETH_ALEN)) { /* :) */ 401 printk("\nmpoa: (%s) lane2_assoc_ind: short MPOA Device Type TLV\n", 402 dev->name); 403 continue; 404 } 405 if ((mpoa_device_type == MPS || mpoa_device_type == MPC) 406 && length < 22 + number_of_mps_macs*ETH_ALEN) { 407 printk("\nmpoa: (%s) lane2_assoc_ind: short MPOA Device Type TLV\n", 408 dev->name); 409 continue; 410 } 411 if (mpoa_device_type != MPS && mpoa_device_type != MPS_AND_MPC) { 412 dprintk("ignoring non-MPS device\n"); 413 if (mpoa_device_type == MPC) tlvs += 20; 414 continue; /* we are only interested in MPSs */ 415 } 416 if (number_of_mps_macs == 0 && mpoa_device_type == MPS_AND_MPC) { 417 printk("\nmpoa: (%s) lane2_assoc_ind: MPS_AND_MPC has zero MACs\n", dev->name); 418 continue; /* someone should read the spec */ 419 } 420 dprintk("this MPS has %d MAC addresses\n", number_of_mps_macs); 421 422 /* ok, now we can go and tell our daemon the control address of MPS */ 423 send_set_mps_ctrl_addr(tlvs, mpc); 424 425 tlvs = copy_macs(mpc, mac_addr, tlvs, number_of_mps_macs, mpoa_device_type); 426 if (tlvs == NULL) return; 427 } 428 if (end_of_tlvs - tlvs != 0) 429 printk("mpoa: (%s) lane2_assoc_ind: ignoring %Zd bytes of trailing TLV carbage\n", 430 dev->name, end_of_tlvs - tlvs); 431 return; 432 } 433 434 /* 435 * Store at least advertizing router's MAC address 436 * plus the possible MAC address(es) to mpc->mps_macs. 437 * For a freshly allocated MPOA client mpc->mps_macs == 0. 438 */ 439 static uint8_t *copy_macs(struct mpoa_client *mpc, uint8_t *router_mac, 440 uint8_t *tlvs, uint8_t mps_macs, uint8_t device_type) 441 { 442 int num_macs; 443 num_macs = (mps_macs > 1) ? mps_macs : 1; 444 445 if (mpc->number_of_mps_macs != num_macs) { /* need to reallocate? */ 446 if (mpc->number_of_mps_macs != 0) kfree(mpc->mps_macs); 447 mpc->number_of_mps_macs = 0; 448 mpc->mps_macs = kmalloc(num_macs*ETH_ALEN, GFP_KERNEL); 449 if (mpc->mps_macs == NULL) { 450 printk("mpoa: (%s) copy_macs: out of mem\n", mpc->dev->name); 451 return NULL; 452 } 453 } 454 memcpy(mpc->mps_macs, router_mac, ETH_ALEN); 455 tlvs += 20; if (device_type == MPS_AND_MPC) tlvs += 20; 456 if (mps_macs > 0) 457 memcpy(mpc->mps_macs, tlvs, mps_macs*ETH_ALEN); 458 tlvs += mps_macs*ETH_ALEN; 459 mpc->number_of_mps_macs = num_macs; 460 461 return tlvs; 462 } 463 464 static int send_via_shortcut(struct sk_buff *skb, struct mpoa_client *mpc) 465 { 466 in_cache_entry *entry; 467 struct iphdr *iph; 468 char *buff; 469 uint32_t ipaddr = 0; 470 471 static struct { 472 struct llc_snap_hdr hdr; 473 uint32_t tag; 474 } tagged_llc_snap_hdr = { 475 {0xaa, 0xaa, 0x03, {0x00, 0x00, 0x00}, {0x88, 0x4c}}, 476 0 477 }; 478 479 buff = skb->data + mpc->dev->hard_header_len; 480 iph = (struct iphdr *)buff; 481 ipaddr = iph->daddr; 482 483 ddprintk("mpoa: (%s) send_via_shortcut: ipaddr 0x%x\n", mpc->dev->name, ipaddr); 484 485 entry = mpc->in_ops->get(ipaddr, mpc); 486 if (entry == NULL) { 487 entry = mpc->in_ops->add_entry(ipaddr, mpc); 488 if (entry != NULL) mpc->in_ops->put(entry); 489 return 1; 490 } 491 if (mpc->in_ops->cache_hit(entry, mpc) != OPEN){ /* threshold not exceeded or VCC not ready */ 492 ddprintk("mpoa: (%s) send_via_shortcut: cache_hit: returns != OPEN\n", mpc->dev->name); 493 mpc->in_ops->put(entry); 494 return 1; 495 } 496 497 ddprintk("mpoa: (%s) send_via_shortcut: using shortcut\n", mpc->dev->name); 498 /* MPOA spec A.1.4, MPOA client must decrement IP ttl at least by one */ 499 if (iph->ttl <= 1) { 500 ddprintk("mpoa: (%s) send_via_shortcut: IP ttl = %u, using LANE\n", mpc->dev->name, iph->ttl); 501 mpc->in_ops->put(entry); 502 return 1; 503 } 504 iph->ttl--; 505 iph->check = 0; 506 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl); 507 508 if (entry->ctrl_info.tag != 0) { 509 ddprintk("mpoa: (%s) send_via_shortcut: adding tag 0x%x\n", mpc->dev->name, entry->ctrl_info.tag); 510 tagged_llc_snap_hdr.tag = entry->ctrl_info.tag; 511 skb_pull(skb, ETH_HLEN); /* get rid of Eth header */ 512 skb_push(skb, sizeof(tagged_llc_snap_hdr)); /* add LLC/SNAP header */ 513 memcpy(skb->data, &tagged_llc_snap_hdr, sizeof(tagged_llc_snap_hdr)); 514 } else { 515 skb_pull(skb, ETH_HLEN); /* get rid of Eth header */ 516 skb_push(skb, sizeof(struct llc_snap_hdr)); /* add LLC/SNAP header + tag */ 517 memcpy(skb->data, &llc_snap_mpoa_data, sizeof(struct llc_snap_hdr)); 518 } 519 520 atomic_add(skb->truesize, &sk_atm(entry->shortcut)->sk_wmem_alloc); 521 ATM_SKB(skb)->atm_options = entry->shortcut->atm_options; 522 entry->shortcut->send(entry->shortcut, skb); 523 entry->packets_fwded++; 524 mpc->in_ops->put(entry); 525 526 return 0; 527 } 528 529 /* 530 * Probably needs some error checks and locking, not sure... 531 */ 532 static int mpc_send_packet(struct sk_buff *skb, struct net_device *dev) 533 { 534 int retval; 535 struct mpoa_client *mpc; 536 struct ethhdr *eth; 537 int i = 0; 538 539 mpc = find_mpc_by_lec(dev); /* this should NEVER fail */ 540 if(mpc == NULL) { 541 printk("mpoa: (%s) mpc_send_packet: no MPC found\n", dev->name); 542 goto non_ip; 543 } 544 545 eth = (struct ethhdr *)skb->data; 546 if (eth->h_proto != htons(ETH_P_IP)) 547 goto non_ip; /* Multi-Protocol Over ATM :-) */ 548 549 while (i < mpc->number_of_mps_macs) { 550 if (!compare_ether_addr(eth->h_dest, (mpc->mps_macs + i*ETH_ALEN))) 551 if ( send_via_shortcut(skb, mpc) == 0 ) /* try shortcut */ 552 return 0; /* success! */ 553 i++; 554 } 555 556 non_ip: 557 retval = mpc->old_hard_start_xmit(skb,dev); 558 559 return retval; 560 } 561 562 static int atm_mpoa_vcc_attach(struct atm_vcc *vcc, void __user *arg) 563 { 564 int bytes_left; 565 struct mpoa_client *mpc; 566 struct atmmpc_ioc ioc_data; 567 in_cache_entry *in_entry; 568 uint32_t ipaddr; 569 unsigned char *ip; 570 571 bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmmpc_ioc)); 572 if (bytes_left != 0) { 573 printk("mpoa: mpc_vcc_attach: Short read (missed %d bytes) from userland\n", bytes_left); 574 return -EFAULT; 575 } 576 ipaddr = ioc_data.ipaddr; 577 if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF) 578 return -EINVAL; 579 580 mpc = find_mpc_by_itfnum(ioc_data.dev_num); 581 if (mpc == NULL) 582 return -EINVAL; 583 584 if (ioc_data.type == MPC_SOCKET_INGRESS) { 585 in_entry = mpc->in_ops->get(ipaddr, mpc); 586 if (in_entry == NULL || in_entry->entry_state < INGRESS_RESOLVED) { 587 printk("mpoa: (%s) mpc_vcc_attach: did not find RESOLVED entry from ingress cache\n", 588 mpc->dev->name); 589 if (in_entry != NULL) mpc->in_ops->put(in_entry); 590 return -EINVAL; 591 } 592 ip = (unsigned char*)&in_entry->ctrl_info.in_dst_ip; 593 printk("mpoa: (%s) mpc_vcc_attach: attaching ingress SVC, entry = %u.%u.%u.%u\n", 594 mpc->dev->name, ip[0], ip[1], ip[2], ip[3]); 595 in_entry->shortcut = vcc; 596 mpc->in_ops->put(in_entry); 597 } else { 598 printk("mpoa: (%s) mpc_vcc_attach: attaching egress SVC\n", mpc->dev->name); 599 } 600 601 vcc->proto_data = mpc->dev; 602 vcc->push = mpc_push; 603 604 return 0; 605 } 606 607 /* 608 * 609 */ 610 static void mpc_vcc_close(struct atm_vcc *vcc, struct net_device *dev) 611 { 612 struct mpoa_client *mpc; 613 in_cache_entry *in_entry; 614 eg_cache_entry *eg_entry; 615 616 mpc = find_mpc_by_lec(dev); 617 if (mpc == NULL) { 618 printk("mpoa: (%s) mpc_vcc_close: close for unknown MPC\n", dev->name); 619 return; 620 } 621 622 dprintk("mpoa: (%s) mpc_vcc_close:\n", dev->name); 623 in_entry = mpc->in_ops->get_by_vcc(vcc, mpc); 624 if (in_entry) { 625 unsigned char *ip __attribute__ ((unused)) = 626 (unsigned char *)&in_entry->ctrl_info.in_dst_ip; 627 dprintk("mpoa: (%s) mpc_vcc_close: ingress SVC closed ip = %u.%u.%u.%u\n", 628 mpc->dev->name, ip[0], ip[1], ip[2], ip[3]); 629 in_entry->shortcut = NULL; 630 mpc->in_ops->put(in_entry); 631 } 632 eg_entry = mpc->eg_ops->get_by_vcc(vcc, mpc); 633 if (eg_entry) { 634 dprintk("mpoa: (%s) mpc_vcc_close: egress SVC closed\n", mpc->dev->name); 635 eg_entry->shortcut = NULL; 636 mpc->eg_ops->put(eg_entry); 637 } 638 639 if (in_entry == NULL && eg_entry == NULL) 640 dprintk("mpoa: (%s) mpc_vcc_close: unused vcc closed\n", dev->name); 641 642 return; 643 } 644 645 static void mpc_push(struct atm_vcc *vcc, struct sk_buff *skb) 646 { 647 struct net_device *dev = (struct net_device *)vcc->proto_data; 648 struct sk_buff *new_skb; 649 eg_cache_entry *eg; 650 struct mpoa_client *mpc; 651 uint32_t tag; 652 char *tmp; 653 654 ddprintk("mpoa: (%s) mpc_push:\n", dev->name); 655 if (skb == NULL) { 656 dprintk("mpoa: (%s) mpc_push: null skb, closing VCC\n", dev->name); 657 mpc_vcc_close(vcc, dev); 658 return; 659 } 660 661 skb->dev = dev; 662 if (memcmp(skb->data, &llc_snap_mpoa_ctrl, sizeof(struct llc_snap_hdr)) == 0) { 663 struct sock *sk = sk_atm(vcc); 664 665 dprintk("mpoa: (%s) mpc_push: control packet arrived\n", dev->name); 666 /* Pass control packets to daemon */ 667 skb_queue_tail(&sk->sk_receive_queue, skb); 668 sk->sk_data_ready(sk, skb->len); 669 return; 670 } 671 672 /* data coming over the shortcut */ 673 atm_return(vcc, skb->truesize); 674 675 mpc = find_mpc_by_lec(dev); 676 if (mpc == NULL) { 677 printk("mpoa: (%s) mpc_push: unknown MPC\n", dev->name); 678 return; 679 } 680 681 if (memcmp(skb->data, &llc_snap_mpoa_data_tagged, sizeof(struct llc_snap_hdr)) == 0) { /* MPOA tagged data */ 682 ddprintk("mpoa: (%s) mpc_push: tagged data packet arrived\n", dev->name); 683 684 } else if (memcmp(skb->data, &llc_snap_mpoa_data, sizeof(struct llc_snap_hdr)) == 0) { /* MPOA data */ 685 printk("mpoa: (%s) mpc_push: non-tagged data packet arrived\n", dev->name); 686 printk(" mpc_push: non-tagged data unsupported, purging\n"); 687 dev_kfree_skb_any(skb); 688 return; 689 } else { 690 printk("mpoa: (%s) mpc_push: garbage arrived, purging\n", dev->name); 691 dev_kfree_skb_any(skb); 692 return; 693 } 694 695 tmp = skb->data + sizeof(struct llc_snap_hdr); 696 tag = *(uint32_t *)tmp; 697 698 eg = mpc->eg_ops->get_by_tag(tag, mpc); 699 if (eg == NULL) { 700 printk("mpoa: (%s) mpc_push: Didn't find egress cache entry, tag = %u\n", 701 dev->name,tag); 702 purge_egress_shortcut(vcc, NULL); 703 dev_kfree_skb_any(skb); 704 return; 705 } 706 707 /* 708 * See if ingress MPC is using shortcut we opened as a return channel. 709 * This means we have a bi-directional vcc opened by us. 710 */ 711 if (eg->shortcut == NULL) { 712 eg->shortcut = vcc; 713 printk("mpoa: (%s) mpc_push: egress SVC in use\n", dev->name); 714 } 715 716 skb_pull(skb, sizeof(struct llc_snap_hdr) + sizeof(tag)); /* get rid of LLC/SNAP header */ 717 new_skb = skb_realloc_headroom(skb, eg->ctrl_info.DH_length); /* LLC/SNAP is shorter than MAC header :( */ 718 dev_kfree_skb_any(skb); 719 if (new_skb == NULL){ 720 mpc->eg_ops->put(eg); 721 return; 722 } 723 skb_push(new_skb, eg->ctrl_info.DH_length); /* add MAC header */ 724 memcpy(new_skb->data, eg->ctrl_info.DLL_header, eg->ctrl_info.DH_length); 725 new_skb->protocol = eth_type_trans(new_skb, dev); 726 new_skb->nh.raw = new_skb->data; 727 728 eg->latest_ip_addr = new_skb->nh.iph->saddr; 729 eg->packets_rcvd++; 730 mpc->eg_ops->put(eg); 731 732 memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data)); 733 netif_rx(new_skb); 734 735 return; 736 } 737 738 static struct atmdev_ops mpc_ops = { /* only send is required */ 739 .close = mpoad_close, 740 .send = msg_from_mpoad 741 }; 742 743 static struct atm_dev mpc_dev = { 744 .ops = &mpc_ops, 745 .type = "mpc", 746 .number = 42, 747 .lock = SPIN_LOCK_UNLOCKED 748 /* members not explicitly initialised will be 0 */ 749 }; 750 751 static int atm_mpoa_mpoad_attach (struct atm_vcc *vcc, int arg) 752 { 753 struct mpoa_client *mpc; 754 struct lec_priv *priv; 755 int err; 756 757 if (mpcs == NULL) { 758 init_timer(&mpc_timer); 759 mpc_timer_refresh(); 760 761 /* This lets us now how our LECs are doing */ 762 err = register_netdevice_notifier(&mpoa_notifier); 763 if (err < 0) { 764 del_timer(&mpc_timer); 765 return err; 766 } 767 } 768 769 mpc = find_mpc_by_itfnum(arg); 770 if (mpc == NULL) { 771 dprintk("mpoa: mpoad_attach: allocating new mpc for itf %d\n", arg); 772 mpc = alloc_mpc(); 773 if (mpc == NULL) 774 return -ENOMEM; 775 mpc->dev_num = arg; 776 mpc->dev = find_lec_by_itfnum(arg); /* NULL if there was no lec */ 777 } 778 if (mpc->mpoad_vcc) { 779 printk("mpoa: mpoad_attach: mpoad is already present for itf %d\n", arg); 780 return -EADDRINUSE; 781 } 782 783 if (mpc->dev) { /* check if the lec is LANE2 capable */ 784 priv = (struct lec_priv *)mpc->dev->priv; 785 if (priv->lane_version < 2) { 786 dev_put(mpc->dev); 787 mpc->dev = NULL; 788 } else 789 priv->lane2_ops->associate_indicator = lane2_assoc_ind; 790 } 791 792 mpc->mpoad_vcc = vcc; 793 vcc->dev = &mpc_dev; 794 vcc_insert_socket(sk_atm(vcc)); 795 set_bit(ATM_VF_META,&vcc->flags); 796 set_bit(ATM_VF_READY,&vcc->flags); 797 798 if (mpc->dev) { 799 char empty[ATM_ESA_LEN]; 800 memset(empty, 0, ATM_ESA_LEN); 801 802 start_mpc(mpc, mpc->dev); 803 /* set address if mpcd e.g. gets killed and restarted. 804 * If we do not do it now we have to wait for the next LE_ARP 805 */ 806 if ( memcmp(mpc->mps_ctrl_addr, empty, ATM_ESA_LEN) != 0 ) 807 send_set_mps_ctrl_addr(mpc->mps_ctrl_addr, mpc); 808 } 809 810 __module_get(THIS_MODULE); 811 return arg; 812 } 813 814 static void send_set_mps_ctrl_addr(char *addr, struct mpoa_client *mpc) 815 { 816 struct k_message mesg; 817 818 memcpy (mpc->mps_ctrl_addr, addr, ATM_ESA_LEN); 819 820 mesg.type = SET_MPS_CTRL_ADDR; 821 memcpy(mesg.MPS_ctrl, addr, ATM_ESA_LEN); 822 msg_to_mpoad(&mesg, mpc); 823 824 return; 825 } 826 827 static void mpoad_close(struct atm_vcc *vcc) 828 { 829 struct mpoa_client *mpc; 830 struct sk_buff *skb; 831 832 mpc = find_mpc_by_vcc(vcc); 833 if (mpc == NULL) { 834 printk("mpoa: mpoad_close: did not find MPC\n"); 835 return; 836 } 837 if (!mpc->mpoad_vcc) { 838 printk("mpoa: mpoad_close: close for non-present mpoad\n"); 839 return; 840 } 841 842 mpc->mpoad_vcc = NULL; 843 if (mpc->dev) { 844 struct lec_priv *priv = (struct lec_priv *)mpc->dev->priv; 845 priv->lane2_ops->associate_indicator = NULL; 846 stop_mpc(mpc); 847 dev_put(mpc->dev); 848 } 849 850 mpc->in_ops->destroy_cache(mpc); 851 mpc->eg_ops->destroy_cache(mpc); 852 853 while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue))) { 854 atm_return(vcc, skb->truesize); 855 kfree_skb(skb); 856 } 857 858 printk("mpoa: (%s) going down\n", 859 (mpc->dev) ? mpc->dev->name : "<unknown>"); 860 module_put(THIS_MODULE); 861 862 return; 863 } 864 865 /* 866 * 867 */ 868 static int msg_from_mpoad(struct atm_vcc *vcc, struct sk_buff *skb) 869 { 870 871 struct mpoa_client *mpc = find_mpc_by_vcc(vcc); 872 struct k_message *mesg = (struct k_message*)skb->data; 873 atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); 874 875 if (mpc == NULL) { 876 printk("mpoa: msg_from_mpoad: no mpc found\n"); 877 return 0; 878 } 879 dprintk("mpoa: (%s) msg_from_mpoad:", (mpc->dev) ? mpc->dev->name : "<unknown>"); 880 switch(mesg->type) { 881 case MPOA_RES_REPLY_RCVD: 882 dprintk(" mpoa_res_reply_rcvd\n"); 883 MPOA_res_reply_rcvd(mesg, mpc); 884 break; 885 case MPOA_TRIGGER_RCVD: 886 dprintk(" mpoa_trigger_rcvd\n"); 887 MPOA_trigger_rcvd(mesg, mpc); 888 break; 889 case INGRESS_PURGE_RCVD: 890 dprintk(" nhrp_purge_rcvd\n"); 891 ingress_purge_rcvd(mesg, mpc); 892 break; 893 case EGRESS_PURGE_RCVD: 894 dprintk(" egress_purge_reply_rcvd\n"); 895 egress_purge_rcvd(mesg, mpc); 896 break; 897 case MPS_DEATH: 898 dprintk(" mps_death\n"); 899 mps_death(mesg, mpc); 900 break; 901 case CACHE_IMPOS_RCVD: 902 dprintk(" cache_impos_rcvd\n"); 903 MPOA_cache_impos_rcvd(mesg, mpc); 904 break; 905 case SET_MPC_CTRL_ADDR: 906 dprintk(" set_mpc_ctrl_addr\n"); 907 set_mpc_ctrl_addr_rcvd(mesg, mpc); 908 break; 909 case SET_MPS_MAC_ADDR: 910 dprintk(" set_mps_mac_addr\n"); 911 set_mps_mac_addr_rcvd(mesg, mpc); 912 break; 913 case CLEAN_UP_AND_EXIT: 914 dprintk(" clean_up_and_exit\n"); 915 clean_up(mesg, mpc, DIE); 916 break; 917 case RELOAD: 918 dprintk(" reload\n"); 919 clean_up(mesg, mpc, RELOAD); 920 break; 921 case SET_MPC_PARAMS: 922 dprintk(" set_mpc_params\n"); 923 mpc->parameters = mesg->content.params; 924 break; 925 default: 926 dprintk(" unknown message %d\n", mesg->type); 927 break; 928 } 929 kfree_skb(skb); 930 931 return 0; 932 } 933 934 /* Remember that this function may not do things that sleep */ 935 int msg_to_mpoad(struct k_message *mesg, struct mpoa_client *mpc) 936 { 937 struct sk_buff *skb; 938 struct sock *sk; 939 940 if (mpc == NULL || !mpc->mpoad_vcc) { 941 printk("mpoa: msg_to_mpoad: mesg %d to a non-existent mpoad\n", mesg->type); 942 return -ENXIO; 943 } 944 945 skb = alloc_skb(sizeof(struct k_message), GFP_ATOMIC); 946 if (skb == NULL) 947 return -ENOMEM; 948 skb_put(skb, sizeof(struct k_message)); 949 memcpy(skb->data, mesg, sizeof(struct k_message)); 950 atm_force_charge(mpc->mpoad_vcc, skb->truesize); 951 952 sk = sk_atm(mpc->mpoad_vcc); 953 skb_queue_tail(&sk->sk_receive_queue, skb); 954 sk->sk_data_ready(sk, skb->len); 955 956 return 0; 957 } 958 959 static int mpoa_event_listener(struct notifier_block *mpoa_notifier, unsigned long event, void *dev_ptr) 960 { 961 struct net_device *dev; 962 struct mpoa_client *mpc; 963 struct lec_priv *priv; 964 965 dev = (struct net_device *)dev_ptr; 966 if (dev->name == NULL || strncmp(dev->name, "lec", 3)) 967 return NOTIFY_DONE; /* we are only interested in lec:s */ 968 969 switch (event) { 970 case NETDEV_REGISTER: /* a new lec device was allocated */ 971 priv = (struct lec_priv *)dev->priv; 972 if (priv->lane_version < 2) 973 break; 974 priv->lane2_ops->associate_indicator = lane2_assoc_ind; 975 mpc = find_mpc_by_itfnum(priv->itfnum); 976 if (mpc == NULL) { 977 dprintk("mpoa: mpoa_event_listener: allocating new mpc for %s\n", 978 dev->name); 979 mpc = alloc_mpc(); 980 if (mpc == NULL) { 981 printk("mpoa: mpoa_event_listener: no new mpc"); 982 break; 983 } 984 } 985 mpc->dev_num = priv->itfnum; 986 mpc->dev = dev; 987 dev_hold(dev); 988 dprintk("mpoa: (%s) was initialized\n", dev->name); 989 break; 990 case NETDEV_UNREGISTER: 991 /* the lec device was deallocated */ 992 mpc = find_mpc_by_lec(dev); 993 if (mpc == NULL) 994 break; 995 dprintk("mpoa: device (%s) was deallocated\n", dev->name); 996 stop_mpc(mpc); 997 dev_put(mpc->dev); 998 mpc->dev = NULL; 999 break; 1000 case NETDEV_UP: 1001 /* the dev was ifconfig'ed up */ 1002 mpc = find_mpc_by_lec(dev); 1003 if (mpc == NULL) 1004 break; 1005 if (mpc->mpoad_vcc != NULL) { 1006 start_mpc(mpc, dev); 1007 } 1008 break; 1009 case NETDEV_DOWN: 1010 /* the dev was ifconfig'ed down */ 1011 /* this means that the flow of packets from the 1012 * upper layer stops 1013 */ 1014 mpc = find_mpc_by_lec(dev); 1015 if (mpc == NULL) 1016 break; 1017 if (mpc->mpoad_vcc != NULL) { 1018 stop_mpc(mpc); 1019 } 1020 break; 1021 case NETDEV_REBOOT: 1022 case NETDEV_CHANGE: 1023 case NETDEV_CHANGEMTU: 1024 case NETDEV_CHANGEADDR: 1025 case NETDEV_GOING_DOWN: 1026 break; 1027 default: 1028 break; 1029 } 1030 1031 return NOTIFY_DONE; 1032 } 1033 1034 /* 1035 * Functions which are called after a message is received from mpcd. 1036 * Msg is reused on purpose. 1037 */ 1038 1039 1040 static void MPOA_trigger_rcvd(struct k_message *msg, struct mpoa_client *mpc) 1041 { 1042 uint32_t dst_ip = msg->content.in_info.in_dst_ip; 1043 in_cache_entry *entry; 1044 1045 entry = mpc->in_ops->get(dst_ip, mpc); 1046 if(entry == NULL){ 1047 entry = mpc->in_ops->add_entry(dst_ip, mpc); 1048 entry->entry_state = INGRESS_RESOLVING; 1049 msg->type = SND_MPOA_RES_RQST; 1050 msg->content.in_info = entry->ctrl_info; 1051 msg_to_mpoad(msg, mpc); 1052 do_gettimeofday(&(entry->reply_wait)); 1053 mpc->in_ops->put(entry); 1054 return; 1055 } 1056 1057 if(entry->entry_state == INGRESS_INVALID){ 1058 entry->entry_state = INGRESS_RESOLVING; 1059 msg->type = SND_MPOA_RES_RQST; 1060 msg->content.in_info = entry->ctrl_info; 1061 msg_to_mpoad(msg, mpc); 1062 do_gettimeofday(&(entry->reply_wait)); 1063 mpc->in_ops->put(entry); 1064 return; 1065 } 1066 1067 printk("mpoa: (%s) MPOA_trigger_rcvd: entry already in resolving state\n", 1068 (mpc->dev) ? mpc->dev->name : "<unknown>"); 1069 mpc->in_ops->put(entry); 1070 return; 1071 } 1072 1073 /* 1074 * Things get complicated because we have to check if there's an egress 1075 * shortcut with suitable traffic parameters we could use. 1076 */ 1077 static void check_qos_and_open_shortcut(struct k_message *msg, struct mpoa_client *client, in_cache_entry *entry) 1078 { 1079 uint32_t dst_ip = msg->content.in_info.in_dst_ip; 1080 struct atm_mpoa_qos *qos = atm_mpoa_search_qos(dst_ip); 1081 eg_cache_entry *eg_entry = client->eg_ops->get_by_src_ip(dst_ip, client); 1082 1083 if(eg_entry && eg_entry->shortcut){ 1084 if(eg_entry->shortcut->qos.txtp.traffic_class & 1085 msg->qos.txtp.traffic_class & 1086 (qos ? qos->qos.txtp.traffic_class : ATM_UBR | ATM_CBR)){ 1087 if(eg_entry->shortcut->qos.txtp.traffic_class == ATM_UBR) 1088 entry->shortcut = eg_entry->shortcut; 1089 else if(eg_entry->shortcut->qos.txtp.max_pcr > 0) 1090 entry->shortcut = eg_entry->shortcut; 1091 } 1092 if(entry->shortcut){ 1093 dprintk("mpoa: (%s) using egress SVC to reach %u.%u.%u.%u\n",client->dev->name, NIPQUAD(dst_ip)); 1094 client->eg_ops->put(eg_entry); 1095 return; 1096 } 1097 } 1098 if (eg_entry != NULL) 1099 client->eg_ops->put(eg_entry); 1100 1101 /* No luck in the egress cache we must open an ingress SVC */ 1102 msg->type = OPEN_INGRESS_SVC; 1103 if (qos && (qos->qos.txtp.traffic_class == msg->qos.txtp.traffic_class)) 1104 { 1105 msg->qos = qos->qos; 1106 printk("mpoa: (%s) trying to get a CBR shortcut\n",client->dev->name); 1107 } 1108 else memset(&msg->qos,0,sizeof(struct atm_qos)); 1109 msg_to_mpoad(msg, client); 1110 return; 1111 } 1112 1113 static void MPOA_res_reply_rcvd(struct k_message *msg, struct mpoa_client *mpc) 1114 { 1115 uint32_t dst_ip = msg->content.in_info.in_dst_ip; 1116 in_cache_entry *entry = mpc->in_ops->get(dst_ip, mpc); 1117 1118 dprintk("mpoa: (%s) MPOA_res_reply_rcvd: ip %u.%u.%u.%u\n", mpc->dev->name, NIPQUAD(dst_ip)); 1119 ddprintk("mpoa: (%s) MPOA_res_reply_rcvd() entry = %p", mpc->dev->name, entry); 1120 if(entry == NULL){ 1121 printk("\nmpoa: (%s) ARGH, received res. reply for an entry that doesn't exist.\n", mpc->dev->name); 1122 return; 1123 } 1124 ddprintk(" entry_state = %d ", entry->entry_state); 1125 1126 if (entry->entry_state == INGRESS_RESOLVED) { 1127 printk("\nmpoa: (%s) MPOA_res_reply_rcvd for RESOLVED entry!\n", mpc->dev->name); 1128 mpc->in_ops->put(entry); 1129 return; 1130 } 1131 1132 entry->ctrl_info = msg->content.in_info; 1133 do_gettimeofday(&(entry->tv)); 1134 do_gettimeofday(&(entry->reply_wait)); /* Used in refreshing func from now on */ 1135 entry->refresh_time = 0; 1136 ddprintk("entry->shortcut = %p\n", entry->shortcut); 1137 1138 if(entry->entry_state == INGRESS_RESOLVING && entry->shortcut != NULL){ 1139 entry->entry_state = INGRESS_RESOLVED; 1140 mpc->in_ops->put(entry); 1141 return; /* Shortcut already open... */ 1142 } 1143 1144 if (entry->shortcut != NULL) { 1145 printk("mpoa: (%s) MPOA_res_reply_rcvd: entry->shortcut != NULL, impossible!\n", 1146 mpc->dev->name); 1147 mpc->in_ops->put(entry); 1148 return; 1149 } 1150 1151 check_qos_and_open_shortcut(msg, mpc, entry); 1152 entry->entry_state = INGRESS_RESOLVED; 1153 mpc->in_ops->put(entry); 1154 1155 return; 1156 1157 } 1158 1159 static void ingress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc) 1160 { 1161 uint32_t dst_ip = msg->content.in_info.in_dst_ip; 1162 uint32_t mask = msg->ip_mask; 1163 unsigned char *ip = (unsigned char *)&dst_ip; 1164 in_cache_entry *entry = mpc->in_ops->get_with_mask(dst_ip, mpc, mask); 1165 1166 if(entry == NULL){ 1167 printk("mpoa: (%s) ingress_purge_rcvd: purge for a non-existing entry, ", mpc->dev->name); 1168 printk("ip = %u.%u.%u.%u\n", ip[0], ip[1], ip[2], ip[3]); 1169 return; 1170 } 1171 1172 do { 1173 dprintk("mpoa: (%s) ingress_purge_rcvd: removing an ingress entry, ip = %u.%u.%u.%u\n" , 1174 mpc->dev->name, ip[0], ip[1], ip[2], ip[3]); 1175 write_lock_bh(&mpc->ingress_lock); 1176 mpc->in_ops->remove_entry(entry, mpc); 1177 write_unlock_bh(&mpc->ingress_lock); 1178 mpc->in_ops->put(entry); 1179 entry = mpc->in_ops->get_with_mask(dst_ip, mpc, mask); 1180 } while (entry != NULL); 1181 1182 return; 1183 } 1184 1185 static void egress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc) 1186 { 1187 uint32_t cache_id = msg->content.eg_info.cache_id; 1188 eg_cache_entry *entry = mpc->eg_ops->get_by_cache_id(cache_id, mpc); 1189 1190 if (entry == NULL) { 1191 dprintk("mpoa: (%s) egress_purge_rcvd: purge for a non-existing entry\n", mpc->dev->name); 1192 return; 1193 } 1194 1195 write_lock_irq(&mpc->egress_lock); 1196 mpc->eg_ops->remove_entry(entry, mpc); 1197 write_unlock_irq(&mpc->egress_lock); 1198 1199 mpc->eg_ops->put(entry); 1200 1201 return; 1202 } 1203 1204 static void purge_egress_shortcut(struct atm_vcc *vcc, eg_cache_entry *entry) 1205 { 1206 struct sock *sk; 1207 struct k_message *purge_msg; 1208 struct sk_buff *skb; 1209 1210 dprintk("mpoa: purge_egress_shortcut: entering\n"); 1211 if (vcc == NULL) { 1212 printk("mpoa: purge_egress_shortcut: vcc == NULL\n"); 1213 return; 1214 } 1215 1216 skb = alloc_skb(sizeof(struct k_message), GFP_ATOMIC); 1217 if (skb == NULL) { 1218 printk("mpoa: purge_egress_shortcut: out of memory\n"); 1219 return; 1220 } 1221 1222 skb_put(skb, sizeof(struct k_message)); 1223 memset(skb->data, 0, sizeof(struct k_message)); 1224 purge_msg = (struct k_message *)skb->data; 1225 purge_msg->type = DATA_PLANE_PURGE; 1226 if (entry != NULL) 1227 purge_msg->content.eg_info = entry->ctrl_info; 1228 1229 atm_force_charge(vcc, skb->truesize); 1230 1231 sk = sk_atm(vcc); 1232 skb_queue_tail(&sk->sk_receive_queue, skb); 1233 sk->sk_data_ready(sk, skb->len); 1234 dprintk("mpoa: purge_egress_shortcut: exiting:\n"); 1235 1236 return; 1237 } 1238 1239 /* 1240 * Our MPS died. Tell our daemon to send NHRP data plane purge to each 1241 * of the egress shortcuts we have. 1242 */ 1243 static void mps_death( struct k_message * msg, struct mpoa_client * mpc ) 1244 { 1245 eg_cache_entry *entry; 1246 1247 dprintk("mpoa: (%s) mps_death:\n", mpc->dev->name); 1248 1249 if(memcmp(msg->MPS_ctrl, mpc->mps_ctrl_addr, ATM_ESA_LEN)){ 1250 printk("mpoa: (%s) mps_death: wrong MPS\n", mpc->dev->name); 1251 return; 1252 } 1253 1254 /* FIXME: This knows too much of the cache structure */ 1255 read_lock_irq(&mpc->egress_lock); 1256 entry = mpc->eg_cache; 1257 while (entry != NULL) { 1258 purge_egress_shortcut(entry->shortcut, entry); 1259 entry = entry->next; 1260 } 1261 read_unlock_irq(&mpc->egress_lock); 1262 1263 mpc->in_ops->destroy_cache(mpc); 1264 mpc->eg_ops->destroy_cache(mpc); 1265 1266 return; 1267 } 1268 1269 static void MPOA_cache_impos_rcvd( struct k_message * msg, struct mpoa_client * mpc) 1270 { 1271 uint16_t holding_time; 1272 eg_cache_entry *entry = mpc->eg_ops->get_by_cache_id(msg->content.eg_info.cache_id, mpc); 1273 1274 holding_time = msg->content.eg_info.holding_time; 1275 dprintk("mpoa: (%s) MPOA_cache_impos_rcvd: entry = %p, holding_time = %u\n", 1276 mpc->dev->name, entry, holding_time); 1277 if(entry == NULL && holding_time) { 1278 entry = mpc->eg_ops->add_entry(msg, mpc); 1279 mpc->eg_ops->put(entry); 1280 return; 1281 } 1282 if(holding_time){ 1283 mpc->eg_ops->update(entry, holding_time); 1284 return; 1285 } 1286 1287 write_lock_irq(&mpc->egress_lock); 1288 mpc->eg_ops->remove_entry(entry, mpc); 1289 write_unlock_irq(&mpc->egress_lock); 1290 1291 mpc->eg_ops->put(entry); 1292 1293 return; 1294 } 1295 1296 static void set_mpc_ctrl_addr_rcvd(struct k_message *mesg, struct mpoa_client *mpc) 1297 { 1298 struct lec_priv *priv; 1299 int i, retval ; 1300 1301 uint8_t tlv[4 + 1 + 1 + 1 + ATM_ESA_LEN]; 1302 1303 tlv[0] = 00; tlv[1] = 0xa0; tlv[2] = 0x3e; tlv[3] = 0x2a; /* type */ 1304 tlv[4] = 1 + 1 + ATM_ESA_LEN; /* length */ 1305 tlv[5] = 0x02; /* MPOA client */ 1306 tlv[6] = 0x00; /* number of MPS MAC addresses */ 1307 1308 memcpy(&tlv[7], mesg->MPS_ctrl, ATM_ESA_LEN); /* MPC ctrl ATM addr */ 1309 memcpy(mpc->our_ctrl_addr, mesg->MPS_ctrl, ATM_ESA_LEN); 1310 1311 dprintk("mpoa: (%s) setting MPC ctrl ATM address to ", 1312 (mpc->dev) ? mpc->dev->name : "<unknown>"); 1313 for (i = 7; i < sizeof(tlv); i++) 1314 dprintk("%02x ", tlv[i]); 1315 dprintk("\n"); 1316 1317 if (mpc->dev) { 1318 priv = (struct lec_priv *)mpc->dev->priv; 1319 retval = priv->lane2_ops->associate_req(mpc->dev, mpc->dev->dev_addr, tlv, sizeof(tlv)); 1320 if (retval == 0) 1321 printk("mpoa: (%s) MPOA device type TLV association failed\n", mpc->dev->name); 1322 retval = priv->lane2_ops->resolve(mpc->dev, NULL, 1, NULL, NULL); 1323 if (retval < 0) 1324 printk("mpoa: (%s) targetless LE_ARP request failed\n", mpc->dev->name); 1325 } 1326 1327 return; 1328 } 1329 1330 static void set_mps_mac_addr_rcvd(struct k_message *msg, struct mpoa_client *client) 1331 { 1332 1333 if(client->number_of_mps_macs) 1334 kfree(client->mps_macs); 1335 client->number_of_mps_macs = 0; 1336 client->mps_macs = kmalloc(ETH_ALEN,GFP_KERNEL); 1337 if (client->mps_macs == NULL) { 1338 printk("mpoa: set_mps_mac_addr_rcvd: out of memory\n"); 1339 return; 1340 } 1341 client->number_of_mps_macs = 1; 1342 memcpy(client->mps_macs, msg->MPS_ctrl, ETH_ALEN); 1343 1344 return; 1345 } 1346 1347 /* 1348 * purge egress cache and tell daemon to 'action' (DIE, RELOAD) 1349 */ 1350 static void clean_up(struct k_message *msg, struct mpoa_client *mpc, int action) 1351 { 1352 1353 eg_cache_entry *entry; 1354 msg->type = SND_EGRESS_PURGE; 1355 1356 1357 /* FIXME: This knows too much of the cache structure */ 1358 read_lock_irq(&mpc->egress_lock); 1359 entry = mpc->eg_cache; 1360 while (entry != NULL){ 1361 msg->content.eg_info = entry->ctrl_info; 1362 dprintk("mpoa: cache_id %u\n", entry->ctrl_info.cache_id); 1363 msg_to_mpoad(msg, mpc); 1364 entry = entry->next; 1365 } 1366 read_unlock_irq(&mpc->egress_lock); 1367 1368 msg->type = action; 1369 msg_to_mpoad(msg, mpc); 1370 return; 1371 } 1372 1373 static void mpc_timer_refresh(void) 1374 { 1375 mpc_timer.expires = jiffies + (MPC_P2 * HZ); 1376 mpc_timer.data = mpc_timer.expires; 1377 mpc_timer.function = mpc_cache_check; 1378 add_timer(&mpc_timer); 1379 1380 return; 1381 } 1382 1383 static void mpc_cache_check( unsigned long checking_time ) 1384 { 1385 struct mpoa_client *mpc = mpcs; 1386 static unsigned long previous_resolving_check_time; 1387 static unsigned long previous_refresh_time; 1388 1389 while( mpc != NULL ){ 1390 mpc->in_ops->clear_count(mpc); 1391 mpc->eg_ops->clear_expired(mpc); 1392 if(checking_time - previous_resolving_check_time > mpc->parameters.mpc_p4 * HZ ){ 1393 mpc->in_ops->check_resolving(mpc); 1394 previous_resolving_check_time = checking_time; 1395 } 1396 if(checking_time - previous_refresh_time > mpc->parameters.mpc_p5 * HZ ){ 1397 mpc->in_ops->refresh(mpc); 1398 previous_refresh_time = checking_time; 1399 } 1400 mpc = mpc->next; 1401 } 1402 mpc_timer_refresh(); 1403 1404 return; 1405 } 1406 1407 static int atm_mpoa_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 1408 { 1409 int err = 0; 1410 struct atm_vcc *vcc = ATM_SD(sock); 1411 1412 if (cmd != ATMMPC_CTRL && cmd != ATMMPC_DATA) 1413 return -ENOIOCTLCMD; 1414 1415 if (!capable(CAP_NET_ADMIN)) 1416 return -EPERM; 1417 1418 switch (cmd) { 1419 case ATMMPC_CTRL: 1420 err = atm_mpoa_mpoad_attach(vcc, (int)arg); 1421 if (err >= 0) 1422 sock->state = SS_CONNECTED; 1423 break; 1424 case ATMMPC_DATA: 1425 err = atm_mpoa_vcc_attach(vcc, (void __user *)arg); 1426 break; 1427 default: 1428 break; 1429 } 1430 return err; 1431 } 1432 1433 1434 static struct atm_ioctl atm_ioctl_ops = { 1435 .owner = THIS_MODULE, 1436 .ioctl = atm_mpoa_ioctl, 1437 }; 1438 1439 static __init int atm_mpoa_init(void) 1440 { 1441 register_atm_ioctl(&atm_ioctl_ops); 1442 1443 #ifdef CONFIG_PROC_FS 1444 if (mpc_proc_init() != 0) 1445 printk(KERN_INFO "mpoa: failed to initialize /proc/mpoa\n"); 1446 else 1447 printk(KERN_INFO "mpoa: /proc/mpoa initialized\n"); 1448 #endif 1449 1450 printk("mpc.c: " __DATE__ " " __TIME__ " initialized\n"); 1451 1452 return 0; 1453 } 1454 1455 static void __exit atm_mpoa_cleanup(void) 1456 { 1457 struct mpoa_client *mpc, *tmp; 1458 struct atm_mpoa_qos *qos, *nextqos; 1459 struct lec_priv *priv; 1460 1461 #ifdef CONFIG_PROC_FS 1462 mpc_proc_clean(); 1463 #endif 1464 1465 del_timer(&mpc_timer); 1466 unregister_netdevice_notifier(&mpoa_notifier); 1467 deregister_atm_ioctl(&atm_ioctl_ops); 1468 1469 mpc = mpcs; 1470 mpcs = NULL; 1471 while (mpc != NULL) { 1472 tmp = mpc->next; 1473 if (mpc->dev != NULL) { 1474 stop_mpc(mpc); 1475 priv = (struct lec_priv *)mpc->dev->priv; 1476 if (priv->lane2_ops != NULL) 1477 priv->lane2_ops->associate_indicator = NULL; 1478 } 1479 ddprintk("mpoa: cleanup_module: about to clear caches\n"); 1480 mpc->in_ops->destroy_cache(mpc); 1481 mpc->eg_ops->destroy_cache(mpc); 1482 ddprintk("mpoa: cleanup_module: caches cleared\n"); 1483 kfree(mpc->mps_macs); 1484 memset(mpc, 0, sizeof(struct mpoa_client)); 1485 ddprintk("mpoa: cleanup_module: about to kfree %p\n", mpc); 1486 kfree(mpc); 1487 ddprintk("mpoa: cleanup_module: next mpc is at %p\n", tmp); 1488 mpc = tmp; 1489 } 1490 1491 qos = qos_head; 1492 qos_head = NULL; 1493 while (qos != NULL) { 1494 nextqos = qos->next; 1495 dprintk("mpoa: cleanup_module: freeing qos entry %p\n", qos); 1496 kfree(qos); 1497 qos = nextqos; 1498 } 1499 1500 return; 1501 } 1502 1503 module_init(atm_mpoa_init); 1504 module_exit(atm_mpoa_cleanup); 1505 1506 MODULE_LICENSE("GPL"); 1507