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/config.h> 29 #include <linux/module.h> 30 31 #include "lec.h" 32 #include "mpc.h" 33 #include "resources.h" 34 35 /* 36 * mpc.c: Implementation of MPOA client kernel part 37 */ 38 39 #if 0 40 #define dprintk printk /* debug */ 41 #else 42 #define dprintk(format,args...) 43 #endif 44 45 #if 0 46 #define ddprintk printk /* more debug */ 47 #else 48 #define ddprintk(format,args...) 49 #endif 50 51 52 53 #define MPOA_TAG_LEN 4 54 55 /* mpc_daemon -> kernel */ 56 static void MPOA_trigger_rcvd (struct k_message *msg, struct mpoa_client *mpc); 57 static void MPOA_res_reply_rcvd(struct k_message *msg, struct mpoa_client *mpc); 58 static void ingress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc); 59 static void egress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc); 60 static void mps_death(struct k_message *msg, struct mpoa_client *mpc); 61 static void clean_up(struct k_message *msg, struct mpoa_client *mpc, int action); 62 static void MPOA_cache_impos_rcvd(struct k_message *msg, struct mpoa_client *mpc); 63 static void set_mpc_ctrl_addr_rcvd(struct k_message *mesg, struct mpoa_client *mpc); 64 static void set_mps_mac_addr_rcvd(struct k_message *mesg, struct mpoa_client *mpc); 65 66 static uint8_t *copy_macs(struct mpoa_client *mpc, uint8_t *router_mac, 67 uint8_t *tlvs, uint8_t mps_macs, uint8_t device_type); 68 static void purge_egress_shortcut(struct atm_vcc *vcc, eg_cache_entry *entry); 69 70 static void send_set_mps_ctrl_addr(char *addr, struct mpoa_client *mpc); 71 static void mpoad_close(struct atm_vcc *vcc); 72 static int msg_from_mpoad(struct atm_vcc *vcc, struct sk_buff *skb); 73 74 static void mpc_push(struct atm_vcc *vcc, struct sk_buff *skb); 75 static int mpc_send_packet(struct sk_buff *skb, struct net_device *dev); 76 static int mpoa_event_listener(struct notifier_block *mpoa_notifier, unsigned long event, void *dev); 77 static void mpc_timer_refresh(void); 78 static void mpc_cache_check( unsigned long checking_time ); 79 80 static struct llc_snap_hdr llc_snap_mpoa_ctrl = { 81 0xaa, 0xaa, 0x03, 82 {0x00, 0x00, 0x5e}, 83 {0x00, 0x03} /* For MPOA control PDUs */ 84 }; 85 static struct llc_snap_hdr llc_snap_mpoa_data = { 86 0xaa, 0xaa, 0x03, 87 {0x00, 0x00, 0x00}, 88 {0x08, 0x00} /* This is for IP PDUs only */ 89 }; 90 static struct llc_snap_hdr llc_snap_mpoa_data_tagged = { 91 0xaa, 0xaa, 0x03, 92 {0x00, 0x00, 0x00}, 93 {0x88, 0x4c} /* This is for tagged data PDUs */ 94 }; 95 96 static struct notifier_block mpoa_notifier = { 97 mpoa_event_listener, 98 NULL, 99 0 100 }; 101 102 #ifdef CONFIG_PROC_FS 103 extern int mpc_proc_init(void); 104 extern void mpc_proc_clean(void); 105 #endif 106 107 struct mpoa_client *mpcs = NULL; /* FIXME */ 108 static struct atm_mpoa_qos *qos_head = NULL; 109 static DEFINE_TIMER(mpc_timer, NULL, 0, 0); 110 111 112 static struct mpoa_client *find_mpc_by_itfnum(int itf) 113 { 114 struct mpoa_client *mpc; 115 116 mpc = mpcs; /* our global linked list */ 117 while (mpc != NULL) { 118 if (mpc->dev_num == itf) 119 return mpc; 120 mpc = mpc->next; 121 } 122 123 return NULL; /* not found */ 124 } 125 126 static struct mpoa_client *find_mpc_by_vcc(struct atm_vcc *vcc) 127 { 128 struct mpoa_client *mpc; 129 130 mpc = mpcs; /* our global linked list */ 131 while (mpc != NULL) { 132 if (mpc->mpoad_vcc == vcc) 133 return mpc; 134 mpc = mpc->next; 135 } 136 137 return NULL; /* not found */ 138 } 139 140 static struct mpoa_client *find_mpc_by_lec(struct net_device *dev) 141 { 142 struct mpoa_client *mpc; 143 144 mpc = mpcs; /* our global linked list */ 145 while (mpc != NULL) { 146 if (mpc->dev == dev) 147 return mpc; 148 mpc = mpc->next; 149 } 150 151 return NULL; /* not found */ 152 } 153 154 /* 155 * Functions for managing QoS list 156 */ 157 158 /* 159 * Overwrites the old entry or makes a new one. 160 */ 161 struct atm_mpoa_qos *atm_mpoa_add_qos(uint32_t dst_ip, struct atm_qos *qos) 162 { 163 struct atm_mpoa_qos *entry; 164 165 entry = atm_mpoa_search_qos(dst_ip); 166 if (entry != NULL) { 167 entry->qos = *qos; 168 return entry; 169 } 170 171 entry = kmalloc(sizeof(struct atm_mpoa_qos), GFP_KERNEL); 172 if (entry == NULL) { 173 printk("mpoa: atm_mpoa_add_qos: out of memory\n"); 174 return entry; 175 } 176 177 entry->ipaddr = dst_ip; 178 entry->qos = *qos; 179 180 entry->next = qos_head; 181 qos_head = entry; 182 183 return entry; 184 } 185 186 struct atm_mpoa_qos *atm_mpoa_search_qos(uint32_t dst_ip) 187 { 188 struct atm_mpoa_qos *qos; 189 190 qos = qos_head; 191 while( qos != NULL ){ 192 if(qos->ipaddr == dst_ip) { 193 break; 194 } 195 qos = qos->next; 196 } 197 198 return qos; 199 } 200 201 /* 202 * Returns 0 for failure 203 */ 204 int atm_mpoa_delete_qos(struct atm_mpoa_qos *entry) 205 { 206 207 struct atm_mpoa_qos *curr; 208 209 if (entry == NULL) return 0; 210 if (entry == qos_head) { 211 qos_head = qos_head->next; 212 kfree(entry); 213 return 1; 214 } 215 216 curr = qos_head; 217 while (curr != NULL) { 218 if (curr->next == entry) { 219 curr->next = entry->next; 220 kfree(entry); 221 return 1; 222 } 223 curr = curr->next; 224 } 225 226 return 0; 227 } 228 229 /* this is buggered - we need locking for qos_head */ 230 void atm_mpoa_disp_qos(struct seq_file *m) 231 { 232 struct atm_mpoa_qos *qos; 233 234 qos = qos_head; 235 seq_printf(m, "QoS entries for shortcuts:\n"); 236 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"); 237 238 while (qos != NULL) { 239 seq_printf(m, "%u.%u.%u.%u\n %-7d %-7d %-7d %-7d %-7d\n %-7d %-7d %-7d %-7d %-7d\n", 240 NIPQUAD(qos->ipaddr), 241 qos->qos.txtp.max_pcr, qos->qos.txtp.pcr, qos->qos.txtp.min_pcr, qos->qos.txtp.max_cdv, qos->qos.txtp.max_sdu, 242 qos->qos.rxtp.max_pcr, qos->qos.rxtp.pcr, qos->qos.rxtp.min_pcr, qos->qos.rxtp.max_cdv, qos->qos.rxtp.max_sdu); 243 qos = qos->next; 244 } 245 } 246 247 static struct net_device *find_lec_by_itfnum(int itf) 248 { 249 struct net_device *dev; 250 char name[IFNAMSIZ]; 251 252 sprintf(name, "lec%d", itf); 253 dev = dev_get_by_name(name); 254 255 return dev; 256 } 257 258 static struct mpoa_client *alloc_mpc(void) 259 { 260 struct mpoa_client *mpc; 261 262 mpc = kmalloc(sizeof (struct mpoa_client), GFP_KERNEL); 263 if (mpc == NULL) 264 return NULL; 265 memset(mpc, 0, sizeof(struct mpoa_client)); 266 rwlock_init(&mpc->ingress_lock); 267 rwlock_init(&mpc->egress_lock); 268 mpc->next = mpcs; 269 atm_mpoa_init_cache(mpc); 270 271 mpc->parameters.mpc_p1 = MPC_P1; 272 mpc->parameters.mpc_p2 = MPC_P2; 273 memset(mpc->parameters.mpc_p3,0,sizeof(mpc->parameters.mpc_p3)); 274 mpc->parameters.mpc_p4 = MPC_P4; 275 mpc->parameters.mpc_p5 = MPC_P5; 276 mpc->parameters.mpc_p6 = MPC_P6; 277 278 mpcs = mpc; 279 280 return mpc; 281 } 282 283 /* 284 * 285 * start_mpc() puts the MPC on line. All the packets destined 286 * to the lec underneath us are now being monitored and 287 * shortcuts will be established. 288 * 289 */ 290 static void start_mpc(struct mpoa_client *mpc, struct net_device *dev) 291 { 292 293 dprintk("mpoa: (%s) start_mpc:\n", mpc->dev->name); 294 if (dev->hard_start_xmit == NULL) { 295 printk("mpoa: (%s) start_mpc: dev->hard_start_xmit == NULL, not starting\n", 296 dev->name); 297 return; 298 } 299 mpc->old_hard_start_xmit = dev->hard_start_xmit; 300 dev->hard_start_xmit = mpc_send_packet; 301 302 return; 303 } 304 305 static void stop_mpc(struct mpoa_client *mpc) 306 { 307 308 dprintk("mpoa: (%s) stop_mpc:", mpc->dev->name); 309 310 /* Lets not nullify lec device's dev->hard_start_xmit */ 311 if (mpc->dev->hard_start_xmit != mpc_send_packet) { 312 dprintk(" mpc already stopped, not fatal\n"); 313 return; 314 } 315 dprintk("\n"); 316 mpc->dev->hard_start_xmit = mpc->old_hard_start_xmit; 317 mpc->old_hard_start_xmit = NULL; 318 /* close_shortcuts(mpc); ??? FIXME */ 319 320 return; 321 } 322 323 static const char *mpoa_device_type_string(char type) __attribute__ ((unused)); 324 325 static const char *mpoa_device_type_string(char type) 326 { 327 switch(type) { 328 case NON_MPOA: 329 return "non-MPOA device"; 330 break; 331 case MPS: 332 return "MPS"; 333 break; 334 case MPC: 335 return "MPC"; 336 break; 337 case MPS_AND_MPC: 338 return "both MPS and MPC"; 339 break; 340 default: 341 return "unspecified (non-MPOA) device"; 342 break; 343 } 344 345 return ""; /* not reached */ 346 } 347 348 /* 349 * lec device calls this via its dev->priv->lane2_ops->associate_indicator() 350 * when it sees a TLV in LE_ARP packet. 351 * We fill in the pointer above when we see a LANE2 lec initializing 352 * See LANE2 spec 3.1.5 353 * 354 * Quite a big and ugly function but when you look at it 355 * all it does is to try to locate and parse MPOA Device 356 * Type TLV. 357 * We give our lec a pointer to this function and when the 358 * lec sees a TLV it uses the pointer to call this function. 359 * 360 */ 361 static void lane2_assoc_ind(struct net_device *dev, uint8_t *mac_addr, 362 uint8_t *tlvs, uint32_t sizeoftlvs) 363 { 364 uint32_t type; 365 uint8_t length, mpoa_device_type, number_of_mps_macs; 366 uint8_t *end_of_tlvs; 367 struct mpoa_client *mpc; 368 369 mpoa_device_type = number_of_mps_macs = 0; /* silence gcc */ 370 dprintk("mpoa: (%s) lane2_assoc_ind: received TLV(s), ", dev->name); 371 dprintk("total length of all TLVs %d\n", sizeoftlvs); 372 mpc = find_mpc_by_lec(dev); /* Sampo-Fix: moved here from below */ 373 if (mpc == NULL) { 374 printk("mpoa: (%s) lane2_assoc_ind: no mpc\n", dev->name); 375 return; 376 } 377 end_of_tlvs = tlvs + sizeoftlvs; 378 while (end_of_tlvs - tlvs >= 5) { 379 type = (tlvs[0] << 24) | (tlvs[1] << 16) | (tlvs[2] << 8) | tlvs[3]; 380 length = tlvs[4]; 381 tlvs += 5; 382 dprintk(" type 0x%x length %02x\n", type, length); 383 if (tlvs + length > end_of_tlvs) { 384 printk("TLV value extends past its buffer, aborting parse\n"); 385 return; 386 } 387 388 if (type == 0) { 389 printk("mpoa: (%s) lane2_assoc_ind: TLV type was 0, returning\n", dev->name); 390 return; 391 } 392 393 if (type != TLV_MPOA_DEVICE_TYPE) { 394 tlvs += length; 395 continue; /* skip other TLVs */ 396 } 397 mpoa_device_type = *tlvs++; 398 number_of_mps_macs = *tlvs++; 399 dprintk("mpoa: (%s) MPOA device type '%s', ", dev->name, mpoa_device_type_string(mpoa_device_type)); 400 if (mpoa_device_type == MPS_AND_MPC && 401 length < (42 + number_of_mps_macs*ETH_ALEN)) { /* :) */ 402 printk("\nmpoa: (%s) lane2_assoc_ind: short MPOA Device Type TLV\n", 403 dev->name); 404 continue; 405 } 406 if ((mpoa_device_type == MPS || mpoa_device_type == MPC) 407 && length < 22 + number_of_mps_macs*ETH_ALEN) { 408 printk("\nmpoa: (%s) lane2_assoc_ind: short MPOA Device Type TLV\n", 409 dev->name); 410 continue; 411 } 412 if (mpoa_device_type != MPS && mpoa_device_type != MPS_AND_MPC) { 413 dprintk("ignoring non-MPS device\n"); 414 if (mpoa_device_type == MPC) tlvs += 20; 415 continue; /* we are only interested in MPSs */ 416 } 417 if (number_of_mps_macs == 0 && mpoa_device_type == MPS_AND_MPC) { 418 printk("\nmpoa: (%s) lane2_assoc_ind: MPS_AND_MPC has zero MACs\n", dev->name); 419 continue; /* someone should read the spec */ 420 } 421 dprintk("this MPS has %d MAC addresses\n", number_of_mps_macs); 422 423 /* ok, now we can go and tell our daemon the control address of MPS */ 424 send_set_mps_ctrl_addr(tlvs, mpc); 425 426 tlvs = copy_macs(mpc, mac_addr, tlvs, number_of_mps_macs, mpoa_device_type); 427 if (tlvs == NULL) return; 428 } 429 if (end_of_tlvs - tlvs != 0) 430 printk("mpoa: (%s) lane2_assoc_ind: ignoring %Zd bytes of trailing TLV carbage\n", 431 dev->name, end_of_tlvs - tlvs); 432 return; 433 } 434 435 /* 436 * Store at least advertizing router's MAC address 437 * plus the possible MAC address(es) to mpc->mps_macs. 438 * For a freshly allocated MPOA client mpc->mps_macs == 0. 439 */ 440 static uint8_t *copy_macs(struct mpoa_client *mpc, uint8_t *router_mac, 441 uint8_t *tlvs, uint8_t mps_macs, uint8_t device_type) 442 { 443 int num_macs; 444 num_macs = (mps_macs > 1) ? mps_macs : 1; 445 446 if (mpc->number_of_mps_macs != num_macs) { /* need to reallocate? */ 447 if (mpc->number_of_mps_macs != 0) kfree(mpc->mps_macs); 448 mpc->number_of_mps_macs = 0; 449 mpc->mps_macs = kmalloc(num_macs*ETH_ALEN, GFP_KERNEL); 450 if (mpc->mps_macs == NULL) { 451 printk("mpoa: (%s) copy_macs: out of mem\n", mpc->dev->name); 452 return NULL; 453 } 454 } 455 memcpy(mpc->mps_macs, router_mac, ETH_ALEN); 456 tlvs += 20; if (device_type == MPS_AND_MPC) tlvs += 20; 457 if (mps_macs > 0) 458 memcpy(mpc->mps_macs, tlvs, mps_macs*ETH_ALEN); 459 tlvs += mps_macs*ETH_ALEN; 460 mpc->number_of_mps_macs = num_macs; 461 462 return tlvs; 463 } 464 465 static int send_via_shortcut(struct sk_buff *skb, struct mpoa_client *mpc) 466 { 467 in_cache_entry *entry; 468 struct iphdr *iph; 469 char *buff; 470 uint32_t ipaddr = 0; 471 472 static struct { 473 struct llc_snap_hdr hdr; 474 uint32_t tag; 475 } tagged_llc_snap_hdr = { 476 {0xaa, 0xaa, 0x03, {0x00, 0x00, 0x00}, {0x88, 0x4c}}, 477 0 478 }; 479 480 buff = skb->data + mpc->dev->hard_header_len; 481 iph = (struct iphdr *)buff; 482 ipaddr = iph->daddr; 483 484 ddprintk("mpoa: (%s) send_via_shortcut: ipaddr 0x%x\n", mpc->dev->name, ipaddr); 485 486 entry = mpc->in_ops->get(ipaddr, mpc); 487 if (entry == NULL) { 488 entry = mpc->in_ops->add_entry(ipaddr, mpc); 489 if (entry != NULL) mpc->in_ops->put(entry); 490 return 1; 491 } 492 if (mpc->in_ops->cache_hit(entry, mpc) != OPEN){ /* threshold not exceeded or VCC not ready */ 493 ddprintk("mpoa: (%s) send_via_shortcut: cache_hit: returns != OPEN\n", mpc->dev->name); 494 mpc->in_ops->put(entry); 495 return 1; 496 } 497 498 ddprintk("mpoa: (%s) send_via_shortcut: using shortcut\n", mpc->dev->name); 499 /* MPOA spec A.1.4, MPOA client must decrement IP ttl at least by one */ 500 if (iph->ttl <= 1) { 501 ddprintk("mpoa: (%s) send_via_shortcut: IP ttl = %u, using LANE\n", mpc->dev->name, iph->ttl); 502 mpc->in_ops->put(entry); 503 return 1; 504 } 505 iph->ttl--; 506 iph->check = 0; 507 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl); 508 509 if (entry->ctrl_info.tag != 0) { 510 ddprintk("mpoa: (%s) send_via_shortcut: adding tag 0x%x\n", mpc->dev->name, entry->ctrl_info.tag); 511 tagged_llc_snap_hdr.tag = entry->ctrl_info.tag; 512 skb_pull(skb, ETH_HLEN); /* get rid of Eth header */ 513 skb_push(skb, sizeof(tagged_llc_snap_hdr)); /* add LLC/SNAP header */ 514 memcpy(skb->data, &tagged_llc_snap_hdr, sizeof(tagged_llc_snap_hdr)); 515 } else { 516 skb_pull(skb, ETH_HLEN); /* get rid of Eth header */ 517 skb_push(skb, sizeof(struct llc_snap_hdr)); /* add LLC/SNAP header + tag */ 518 memcpy(skb->data, &llc_snap_mpoa_data, sizeof(struct llc_snap_hdr)); 519 } 520 521 atomic_add(skb->truesize, &sk_atm(entry->shortcut)->sk_wmem_alloc); 522 ATM_SKB(skb)->atm_options = entry->shortcut->atm_options; 523 entry->shortcut->send(entry->shortcut, skb); 524 entry->packets_fwded++; 525 mpc->in_ops->put(entry); 526 527 return 0; 528 } 529 530 /* 531 * Probably needs some error checks and locking, not sure... 532 */ 533 static int mpc_send_packet(struct sk_buff *skb, struct net_device *dev) 534 { 535 int retval; 536 struct mpoa_client *mpc; 537 struct ethhdr *eth; 538 int i = 0; 539 540 mpc = find_mpc_by_lec(dev); /* this should NEVER fail */ 541 if(mpc == NULL) { 542 printk("mpoa: (%s) mpc_send_packet: no MPC found\n", dev->name); 543 goto non_ip; 544 } 545 546 eth = (struct ethhdr *)skb->data; 547 if (eth->h_proto != htons(ETH_P_IP)) 548 goto non_ip; /* Multi-Protocol Over ATM :-) */ 549 550 while (i < mpc->number_of_mps_macs) { 551 if (!compare_ether_addr(eth->h_dest, (mpc->mps_macs + i*ETH_ALEN))) 552 if ( send_via_shortcut(skb, mpc) == 0 ) /* try shortcut */ 553 return 0; /* success! */ 554 i++; 555 } 556 557 non_ip: 558 retval = mpc->old_hard_start_xmit(skb,dev); 559 560 return retval; 561 } 562 563 static int atm_mpoa_vcc_attach(struct atm_vcc *vcc, void __user *arg) 564 { 565 int bytes_left; 566 struct mpoa_client *mpc; 567 struct atmmpc_ioc ioc_data; 568 in_cache_entry *in_entry; 569 uint32_t ipaddr; 570 unsigned char *ip; 571 572 bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmmpc_ioc)); 573 if (bytes_left != 0) { 574 printk("mpoa: mpc_vcc_attach: Short read (missed %d bytes) from userland\n", bytes_left); 575 return -EFAULT; 576 } 577 ipaddr = ioc_data.ipaddr; 578 if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF) 579 return -EINVAL; 580 581 mpc = find_mpc_by_itfnum(ioc_data.dev_num); 582 if (mpc == NULL) 583 return -EINVAL; 584 585 if (ioc_data.type == MPC_SOCKET_INGRESS) { 586 in_entry = mpc->in_ops->get(ipaddr, mpc); 587 if (in_entry == NULL || in_entry->entry_state < INGRESS_RESOLVED) { 588 printk("mpoa: (%s) mpc_vcc_attach: did not find RESOLVED entry from ingress cache\n", 589 mpc->dev->name); 590 if (in_entry != NULL) mpc->in_ops->put(in_entry); 591 return -EINVAL; 592 } 593 ip = (unsigned char*)&in_entry->ctrl_info.in_dst_ip; 594 printk("mpoa: (%s) mpc_vcc_attach: attaching ingress SVC, entry = %u.%u.%u.%u\n", 595 mpc->dev->name, ip[0], ip[1], ip[2], ip[3]); 596 in_entry->shortcut = vcc; 597 mpc->in_ops->put(in_entry); 598 } else { 599 printk("mpoa: (%s) mpc_vcc_attach: attaching egress SVC\n", mpc->dev->name); 600 } 601 602 vcc->proto_data = mpc->dev; 603 vcc->push = mpc_push; 604 605 return 0; 606 } 607 608 /* 609 * 610 */ 611 static void mpc_vcc_close(struct atm_vcc *vcc, struct net_device *dev) 612 { 613 struct mpoa_client *mpc; 614 in_cache_entry *in_entry; 615 eg_cache_entry *eg_entry; 616 617 mpc = find_mpc_by_lec(dev); 618 if (mpc == NULL) { 619 printk("mpoa: (%s) mpc_vcc_close: close for unknown MPC\n", dev->name); 620 return; 621 } 622 623 dprintk("mpoa: (%s) mpc_vcc_close:\n", dev->name); 624 in_entry = mpc->in_ops->get_by_vcc(vcc, mpc); 625 if (in_entry) { 626 unsigned char *ip __attribute__ ((unused)) = 627 (unsigned char *)&in_entry->ctrl_info.in_dst_ip; 628 dprintk("mpoa: (%s) mpc_vcc_close: ingress SVC closed ip = %u.%u.%u.%u\n", 629 mpc->dev->name, ip[0], ip[1], ip[2], ip[3]); 630 in_entry->shortcut = NULL; 631 mpc->in_ops->put(in_entry); 632 } 633 eg_entry = mpc->eg_ops->get_by_vcc(vcc, mpc); 634 if (eg_entry) { 635 dprintk("mpoa: (%s) mpc_vcc_close: egress SVC closed\n", mpc->dev->name); 636 eg_entry->shortcut = NULL; 637 mpc->eg_ops->put(eg_entry); 638 } 639 640 if (in_entry == NULL && eg_entry == NULL) 641 dprintk("mpoa: (%s) mpc_vcc_close: unused vcc closed\n", dev->name); 642 643 return; 644 } 645 646 static void mpc_push(struct atm_vcc *vcc, struct sk_buff *skb) 647 { 648 struct net_device *dev = (struct net_device *)vcc->proto_data; 649 struct sk_buff *new_skb; 650 eg_cache_entry *eg; 651 struct mpoa_client *mpc; 652 uint32_t tag; 653 char *tmp; 654 655 ddprintk("mpoa: (%s) mpc_push:\n", dev->name); 656 if (skb == NULL) { 657 dprintk("mpoa: (%s) mpc_push: null skb, closing VCC\n", dev->name); 658 mpc_vcc_close(vcc, dev); 659 return; 660 } 661 662 skb->dev = dev; 663 if (memcmp(skb->data, &llc_snap_mpoa_ctrl, sizeof(struct llc_snap_hdr)) == 0) { 664 struct sock *sk = sk_atm(vcc); 665 666 dprintk("mpoa: (%s) mpc_push: control packet arrived\n", dev->name); 667 /* Pass control packets to daemon */ 668 skb_queue_tail(&sk->sk_receive_queue, skb); 669 sk->sk_data_ready(sk, skb->len); 670 return; 671 } 672 673 /* data coming over the shortcut */ 674 atm_return(vcc, skb->truesize); 675 676 mpc = find_mpc_by_lec(dev); 677 if (mpc == NULL) { 678 printk("mpoa: (%s) mpc_push: unknown MPC\n", dev->name); 679 return; 680 } 681 682 if (memcmp(skb->data, &llc_snap_mpoa_data_tagged, sizeof(struct llc_snap_hdr)) == 0) { /* MPOA tagged data */ 683 ddprintk("mpoa: (%s) mpc_push: tagged data packet arrived\n", dev->name); 684 685 } else if (memcmp(skb->data, &llc_snap_mpoa_data, sizeof(struct llc_snap_hdr)) == 0) { /* MPOA data */ 686 printk("mpoa: (%s) mpc_push: non-tagged data packet arrived\n", dev->name); 687 printk(" mpc_push: non-tagged data unsupported, purging\n"); 688 dev_kfree_skb_any(skb); 689 return; 690 } else { 691 printk("mpoa: (%s) mpc_push: garbage arrived, purging\n", dev->name); 692 dev_kfree_skb_any(skb); 693 return; 694 } 695 696 tmp = skb->data + sizeof(struct llc_snap_hdr); 697 tag = *(uint32_t *)tmp; 698 699 eg = mpc->eg_ops->get_by_tag(tag, mpc); 700 if (eg == NULL) { 701 printk("mpoa: (%s) mpc_push: Didn't find egress cache entry, tag = %u\n", 702 dev->name,tag); 703 purge_egress_shortcut(vcc, NULL); 704 dev_kfree_skb_any(skb); 705 return; 706 } 707 708 /* 709 * See if ingress MPC is using shortcut we opened as a return channel. 710 * This means we have a bi-directional vcc opened by us. 711 */ 712 if (eg->shortcut == NULL) { 713 eg->shortcut = vcc; 714 printk("mpoa: (%s) mpc_push: egress SVC in use\n", dev->name); 715 } 716 717 skb_pull(skb, sizeof(struct llc_snap_hdr) + sizeof(tag)); /* get rid of LLC/SNAP header */ 718 new_skb = skb_realloc_headroom(skb, eg->ctrl_info.DH_length); /* LLC/SNAP is shorter than MAC header :( */ 719 dev_kfree_skb_any(skb); 720 if (new_skb == NULL){ 721 mpc->eg_ops->put(eg); 722 return; 723 } 724 skb_push(new_skb, eg->ctrl_info.DH_length); /* add MAC header */ 725 memcpy(new_skb->data, eg->ctrl_info.DLL_header, eg->ctrl_info.DH_length); 726 new_skb->protocol = eth_type_trans(new_skb, dev); 727 new_skb->nh.raw = new_skb->data; 728 729 eg->latest_ip_addr = new_skb->nh.iph->saddr; 730 eg->packets_rcvd++; 731 mpc->eg_ops->put(eg); 732 733 memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data)); 734 netif_rx(new_skb); 735 736 return; 737 } 738 739 static struct atmdev_ops mpc_ops = { /* only send is required */ 740 .close = mpoad_close, 741 .send = msg_from_mpoad 742 }; 743 744 static struct atm_dev mpc_dev = { 745 .ops = &mpc_ops, 746 .type = "mpc", 747 .number = 42, 748 .lock = SPIN_LOCK_UNLOCKED 749 /* members not explicitly initialised will be 0 */ 750 }; 751 752 static int atm_mpoa_mpoad_attach (struct atm_vcc *vcc, int arg) 753 { 754 struct mpoa_client *mpc; 755 struct lec_priv *priv; 756 int err; 757 758 if (mpcs == NULL) { 759 init_timer(&mpc_timer); 760 mpc_timer_refresh(); 761 762 /* This lets us now how our LECs are doing */ 763 err = register_netdevice_notifier(&mpoa_notifier); 764 if (err < 0) { 765 del_timer(&mpc_timer); 766 return err; 767 } 768 } 769 770 mpc = find_mpc_by_itfnum(arg); 771 if (mpc == NULL) { 772 dprintk("mpoa: mpoad_attach: allocating new mpc for itf %d\n", arg); 773 mpc = alloc_mpc(); 774 if (mpc == NULL) 775 return -ENOMEM; 776 mpc->dev_num = arg; 777 mpc->dev = find_lec_by_itfnum(arg); /* NULL if there was no lec */ 778 } 779 if (mpc->mpoad_vcc) { 780 printk("mpoa: mpoad_attach: mpoad is already present for itf %d\n", arg); 781 return -EADDRINUSE; 782 } 783 784 if (mpc->dev) { /* check if the lec is LANE2 capable */ 785 priv = (struct lec_priv *)mpc->dev->priv; 786 if (priv->lane_version < 2) { 787 dev_put(mpc->dev); 788 mpc->dev = NULL; 789 } else 790 priv->lane2_ops->associate_indicator = lane2_assoc_ind; 791 } 792 793 mpc->mpoad_vcc = vcc; 794 vcc->dev = &mpc_dev; 795 vcc_insert_socket(sk_atm(vcc)); 796 set_bit(ATM_VF_META,&vcc->flags); 797 set_bit(ATM_VF_READY,&vcc->flags); 798 799 if (mpc->dev) { 800 char empty[ATM_ESA_LEN]; 801 memset(empty, 0, ATM_ESA_LEN); 802 803 start_mpc(mpc, mpc->dev); 804 /* set address if mpcd e.g. gets killed and restarted. 805 * If we do not do it now we have to wait for the next LE_ARP 806 */ 807 if ( memcmp(mpc->mps_ctrl_addr, empty, ATM_ESA_LEN) != 0 ) 808 send_set_mps_ctrl_addr(mpc->mps_ctrl_addr, mpc); 809 } 810 811 __module_get(THIS_MODULE); 812 return arg; 813 } 814 815 static void send_set_mps_ctrl_addr(char *addr, struct mpoa_client *mpc) 816 { 817 struct k_message mesg; 818 819 memcpy (mpc->mps_ctrl_addr, addr, ATM_ESA_LEN); 820 821 mesg.type = SET_MPS_CTRL_ADDR; 822 memcpy(mesg.MPS_ctrl, addr, ATM_ESA_LEN); 823 msg_to_mpoad(&mesg, mpc); 824 825 return; 826 } 827 828 static void mpoad_close(struct atm_vcc *vcc) 829 { 830 struct mpoa_client *mpc; 831 struct sk_buff *skb; 832 833 mpc = find_mpc_by_vcc(vcc); 834 if (mpc == NULL) { 835 printk("mpoa: mpoad_close: did not find MPC\n"); 836 return; 837 } 838 if (!mpc->mpoad_vcc) { 839 printk("mpoa: mpoad_close: close for non-present mpoad\n"); 840 return; 841 } 842 843 mpc->mpoad_vcc = NULL; 844 if (mpc->dev) { 845 struct lec_priv *priv = (struct lec_priv *)mpc->dev->priv; 846 priv->lane2_ops->associate_indicator = NULL; 847 stop_mpc(mpc); 848 dev_put(mpc->dev); 849 } 850 851 mpc->in_ops->destroy_cache(mpc); 852 mpc->eg_ops->destroy_cache(mpc); 853 854 while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue))) { 855 atm_return(vcc, skb->truesize); 856 kfree_skb(skb); 857 } 858 859 printk("mpoa: (%s) going down\n", 860 (mpc->dev) ? mpc->dev->name : "<unknown>"); 861 module_put(THIS_MODULE); 862 863 return; 864 } 865 866 /* 867 * 868 */ 869 static int msg_from_mpoad(struct atm_vcc *vcc, struct sk_buff *skb) 870 { 871 872 struct mpoa_client *mpc = find_mpc_by_vcc(vcc); 873 struct k_message *mesg = (struct k_message*)skb->data; 874 atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); 875 876 if (mpc == NULL) { 877 printk("mpoa: msg_from_mpoad: no mpc found\n"); 878 return 0; 879 } 880 dprintk("mpoa: (%s) msg_from_mpoad:", (mpc->dev) ? mpc->dev->name : "<unknown>"); 881 switch(mesg->type) { 882 case MPOA_RES_REPLY_RCVD: 883 dprintk(" mpoa_res_reply_rcvd\n"); 884 MPOA_res_reply_rcvd(mesg, mpc); 885 break; 886 case MPOA_TRIGGER_RCVD: 887 dprintk(" mpoa_trigger_rcvd\n"); 888 MPOA_trigger_rcvd(mesg, mpc); 889 break; 890 case INGRESS_PURGE_RCVD: 891 dprintk(" nhrp_purge_rcvd\n"); 892 ingress_purge_rcvd(mesg, mpc); 893 break; 894 case EGRESS_PURGE_RCVD: 895 dprintk(" egress_purge_reply_rcvd\n"); 896 egress_purge_rcvd(mesg, mpc); 897 break; 898 case MPS_DEATH: 899 dprintk(" mps_death\n"); 900 mps_death(mesg, mpc); 901 break; 902 case CACHE_IMPOS_RCVD: 903 dprintk(" cache_impos_rcvd\n"); 904 MPOA_cache_impos_rcvd(mesg, mpc); 905 break; 906 case SET_MPC_CTRL_ADDR: 907 dprintk(" set_mpc_ctrl_addr\n"); 908 set_mpc_ctrl_addr_rcvd(mesg, mpc); 909 break; 910 case SET_MPS_MAC_ADDR: 911 dprintk(" set_mps_mac_addr\n"); 912 set_mps_mac_addr_rcvd(mesg, mpc); 913 break; 914 case CLEAN_UP_AND_EXIT: 915 dprintk(" clean_up_and_exit\n"); 916 clean_up(mesg, mpc, DIE); 917 break; 918 case RELOAD: 919 dprintk(" reload\n"); 920 clean_up(mesg, mpc, RELOAD); 921 break; 922 case SET_MPC_PARAMS: 923 dprintk(" set_mpc_params\n"); 924 mpc->parameters = mesg->content.params; 925 break; 926 default: 927 dprintk(" unknown message %d\n", mesg->type); 928 break; 929 } 930 kfree_skb(skb); 931 932 return 0; 933 } 934 935 /* Remember that this function may not do things that sleep */ 936 int msg_to_mpoad(struct k_message *mesg, struct mpoa_client *mpc) 937 { 938 struct sk_buff *skb; 939 struct sock *sk; 940 941 if (mpc == NULL || !mpc->mpoad_vcc) { 942 printk("mpoa: msg_to_mpoad: mesg %d to a non-existent mpoad\n", mesg->type); 943 return -ENXIO; 944 } 945 946 skb = alloc_skb(sizeof(struct k_message), GFP_ATOMIC); 947 if (skb == NULL) 948 return -ENOMEM; 949 skb_put(skb, sizeof(struct k_message)); 950 memcpy(skb->data, mesg, sizeof(struct k_message)); 951 atm_force_charge(mpc->mpoad_vcc, skb->truesize); 952 953 sk = sk_atm(mpc->mpoad_vcc); 954 skb_queue_tail(&sk->sk_receive_queue, skb); 955 sk->sk_data_ready(sk, skb->len); 956 957 return 0; 958 } 959 960 static int mpoa_event_listener(struct notifier_block *mpoa_notifier, unsigned long event, void *dev_ptr) 961 { 962 struct net_device *dev; 963 struct mpoa_client *mpc; 964 struct lec_priv *priv; 965 966 dev = (struct net_device *)dev_ptr; 967 if (dev->name == NULL || strncmp(dev->name, "lec", 3)) 968 return NOTIFY_DONE; /* we are only interested in lec:s */ 969 970 switch (event) { 971 case NETDEV_REGISTER: /* a new lec device was allocated */ 972 priv = (struct lec_priv *)dev->priv; 973 if (priv->lane_version < 2) 974 break; 975 priv->lane2_ops->associate_indicator = lane2_assoc_ind; 976 mpc = find_mpc_by_itfnum(priv->itfnum); 977 if (mpc == NULL) { 978 dprintk("mpoa: mpoa_event_listener: allocating new mpc for %s\n", 979 dev->name); 980 mpc = alloc_mpc(); 981 if (mpc == NULL) { 982 printk("mpoa: mpoa_event_listener: no new mpc"); 983 break; 984 } 985 } 986 mpc->dev_num = priv->itfnum; 987 mpc->dev = dev; 988 dev_hold(dev); 989 dprintk("mpoa: (%s) was initialized\n", dev->name); 990 break; 991 case NETDEV_UNREGISTER: 992 /* the lec device was deallocated */ 993 mpc = find_mpc_by_lec(dev); 994 if (mpc == NULL) 995 break; 996 dprintk("mpoa: device (%s) was deallocated\n", dev->name); 997 stop_mpc(mpc); 998 dev_put(mpc->dev); 999 mpc->dev = NULL; 1000 break; 1001 case NETDEV_UP: 1002 /* the dev was ifconfig'ed up */ 1003 mpc = find_mpc_by_lec(dev); 1004 if (mpc == NULL) 1005 break; 1006 if (mpc->mpoad_vcc != NULL) { 1007 start_mpc(mpc, dev); 1008 } 1009 break; 1010 case NETDEV_DOWN: 1011 /* the dev was ifconfig'ed down */ 1012 /* this means that the flow of packets from the 1013 * upper layer stops 1014 */ 1015 mpc = find_mpc_by_lec(dev); 1016 if (mpc == NULL) 1017 break; 1018 if (mpc->mpoad_vcc != NULL) { 1019 stop_mpc(mpc); 1020 } 1021 break; 1022 case NETDEV_REBOOT: 1023 case NETDEV_CHANGE: 1024 case NETDEV_CHANGEMTU: 1025 case NETDEV_CHANGEADDR: 1026 case NETDEV_GOING_DOWN: 1027 break; 1028 default: 1029 break; 1030 } 1031 1032 return NOTIFY_DONE; 1033 } 1034 1035 /* 1036 * Functions which are called after a message is received from mpcd. 1037 * Msg is reused on purpose. 1038 */ 1039 1040 1041 static void MPOA_trigger_rcvd(struct k_message *msg, struct mpoa_client *mpc) 1042 { 1043 uint32_t dst_ip = msg->content.in_info.in_dst_ip; 1044 in_cache_entry *entry; 1045 1046 entry = mpc->in_ops->get(dst_ip, mpc); 1047 if(entry == NULL){ 1048 entry = mpc->in_ops->add_entry(dst_ip, mpc); 1049 entry->entry_state = INGRESS_RESOLVING; 1050 msg->type = SND_MPOA_RES_RQST; 1051 msg->content.in_info = entry->ctrl_info; 1052 msg_to_mpoad(msg, mpc); 1053 do_gettimeofday(&(entry->reply_wait)); 1054 mpc->in_ops->put(entry); 1055 return; 1056 } 1057 1058 if(entry->entry_state == INGRESS_INVALID){ 1059 entry->entry_state = INGRESS_RESOLVING; 1060 msg->type = SND_MPOA_RES_RQST; 1061 msg->content.in_info = entry->ctrl_info; 1062 msg_to_mpoad(msg, mpc); 1063 do_gettimeofday(&(entry->reply_wait)); 1064 mpc->in_ops->put(entry); 1065 return; 1066 } 1067 1068 printk("mpoa: (%s) MPOA_trigger_rcvd: entry already in resolving state\n", 1069 (mpc->dev) ? mpc->dev->name : "<unknown>"); 1070 mpc->in_ops->put(entry); 1071 return; 1072 } 1073 1074 /* 1075 * Things get complicated because we have to check if there's an egress 1076 * shortcut with suitable traffic parameters we could use. 1077 */ 1078 static void check_qos_and_open_shortcut(struct k_message *msg, struct mpoa_client *client, in_cache_entry *entry) 1079 { 1080 uint32_t dst_ip = msg->content.in_info.in_dst_ip; 1081 struct atm_mpoa_qos *qos = atm_mpoa_search_qos(dst_ip); 1082 eg_cache_entry *eg_entry = client->eg_ops->get_by_src_ip(dst_ip, client); 1083 1084 if(eg_entry && eg_entry->shortcut){ 1085 if(eg_entry->shortcut->qos.txtp.traffic_class & 1086 msg->qos.txtp.traffic_class & 1087 (qos ? qos->qos.txtp.traffic_class : ATM_UBR | ATM_CBR)){ 1088 if(eg_entry->shortcut->qos.txtp.traffic_class == ATM_UBR) 1089 entry->shortcut = eg_entry->shortcut; 1090 else if(eg_entry->shortcut->qos.txtp.max_pcr > 0) 1091 entry->shortcut = eg_entry->shortcut; 1092 } 1093 if(entry->shortcut){ 1094 dprintk("mpoa: (%s) using egress SVC to reach %u.%u.%u.%u\n",client->dev->name, NIPQUAD(dst_ip)); 1095 client->eg_ops->put(eg_entry); 1096 return; 1097 } 1098 } 1099 if (eg_entry != NULL) 1100 client->eg_ops->put(eg_entry); 1101 1102 /* No luck in the egress cache we must open an ingress SVC */ 1103 msg->type = OPEN_INGRESS_SVC; 1104 if (qos && (qos->qos.txtp.traffic_class == msg->qos.txtp.traffic_class)) 1105 { 1106 msg->qos = qos->qos; 1107 printk("mpoa: (%s) trying to get a CBR shortcut\n",client->dev->name); 1108 } 1109 else memset(&msg->qos,0,sizeof(struct atm_qos)); 1110 msg_to_mpoad(msg, client); 1111 return; 1112 } 1113 1114 static void MPOA_res_reply_rcvd(struct k_message *msg, struct mpoa_client *mpc) 1115 { 1116 unsigned char *ip; 1117 1118 uint32_t dst_ip = msg->content.in_info.in_dst_ip; 1119 in_cache_entry *entry = mpc->in_ops->get(dst_ip, mpc); 1120 dprintk("mpoa: (%s) MPOA_res_reply_rcvd: ip %u.%u.%u.%u\n", mpc->dev->name, NIPQUAD(dst_ip)); 1121 ddprintk("mpoa: (%s) MPOA_res_reply_rcvd() entry = %p", mpc->dev->name, entry); 1122 if(entry == NULL){ 1123 printk("\nmpoa: (%s) ARGH, received res. reply for an entry that doesn't exist.\n", mpc->dev->name); 1124 return; 1125 } 1126 ddprintk(" entry_state = %d ", entry->entry_state); 1127 1128 if (entry->entry_state == INGRESS_RESOLVED) { 1129 printk("\nmpoa: (%s) MPOA_res_reply_rcvd for RESOLVED entry!\n", mpc->dev->name); 1130 mpc->in_ops->put(entry); 1131 return; 1132 } 1133 1134 entry->ctrl_info = msg->content.in_info; 1135 do_gettimeofday(&(entry->tv)); 1136 do_gettimeofday(&(entry->reply_wait)); /* Used in refreshing func from now on */ 1137 entry->refresh_time = 0; 1138 ddprintk("entry->shortcut = %p\n", entry->shortcut); 1139 1140 if(entry->entry_state == INGRESS_RESOLVING && entry->shortcut != NULL){ 1141 entry->entry_state = INGRESS_RESOLVED; 1142 mpc->in_ops->put(entry); 1143 return; /* Shortcut already open... */ 1144 } 1145 1146 if (entry->shortcut != NULL) { 1147 printk("mpoa: (%s) MPOA_res_reply_rcvd: entry->shortcut != NULL, impossible!\n", 1148 mpc->dev->name); 1149 mpc->in_ops->put(entry); 1150 return; 1151 } 1152 1153 check_qos_and_open_shortcut(msg, mpc, entry); 1154 entry->entry_state = INGRESS_RESOLVED; 1155 mpc->in_ops->put(entry); 1156 1157 return; 1158 1159 } 1160 1161 static void ingress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc) 1162 { 1163 uint32_t dst_ip = msg->content.in_info.in_dst_ip; 1164 uint32_t mask = msg->ip_mask; 1165 unsigned char *ip = (unsigned char *)&dst_ip; 1166 in_cache_entry *entry = mpc->in_ops->get_with_mask(dst_ip, mpc, mask); 1167 1168 if(entry == NULL){ 1169 printk("mpoa: (%s) ingress_purge_rcvd: purge for a non-existing entry, ", mpc->dev->name); 1170 printk("ip = %u.%u.%u.%u\n", ip[0], ip[1], ip[2], ip[3]); 1171 return; 1172 } 1173 1174 do { 1175 dprintk("mpoa: (%s) ingress_purge_rcvd: removing an ingress entry, ip = %u.%u.%u.%u\n" , 1176 mpc->dev->name, ip[0], ip[1], ip[2], ip[3]); 1177 write_lock_bh(&mpc->ingress_lock); 1178 mpc->in_ops->remove_entry(entry, mpc); 1179 write_unlock_bh(&mpc->ingress_lock); 1180 mpc->in_ops->put(entry); 1181 entry = mpc->in_ops->get_with_mask(dst_ip, mpc, mask); 1182 } while (entry != NULL); 1183 1184 return; 1185 } 1186 1187 static void egress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc) 1188 { 1189 uint32_t cache_id = msg->content.eg_info.cache_id; 1190 eg_cache_entry *entry = mpc->eg_ops->get_by_cache_id(cache_id, mpc); 1191 1192 if (entry == NULL) { 1193 dprintk("mpoa: (%s) egress_purge_rcvd: purge for a non-existing entry\n", mpc->dev->name); 1194 return; 1195 } 1196 1197 write_lock_irq(&mpc->egress_lock); 1198 mpc->eg_ops->remove_entry(entry, mpc); 1199 write_unlock_irq(&mpc->egress_lock); 1200 1201 mpc->eg_ops->put(entry); 1202 1203 return; 1204 } 1205 1206 static void purge_egress_shortcut(struct atm_vcc *vcc, eg_cache_entry *entry) 1207 { 1208 struct sock *sk; 1209 struct k_message *purge_msg; 1210 struct sk_buff *skb; 1211 1212 dprintk("mpoa: purge_egress_shortcut: entering\n"); 1213 if (vcc == NULL) { 1214 printk("mpoa: purge_egress_shortcut: vcc == NULL\n"); 1215 return; 1216 } 1217 1218 skb = alloc_skb(sizeof(struct k_message), GFP_ATOMIC); 1219 if (skb == NULL) { 1220 printk("mpoa: purge_egress_shortcut: out of memory\n"); 1221 return; 1222 } 1223 1224 skb_put(skb, sizeof(struct k_message)); 1225 memset(skb->data, 0, sizeof(struct k_message)); 1226 purge_msg = (struct k_message *)skb->data; 1227 purge_msg->type = DATA_PLANE_PURGE; 1228 if (entry != NULL) 1229 purge_msg->content.eg_info = entry->ctrl_info; 1230 1231 atm_force_charge(vcc, skb->truesize); 1232 1233 sk = sk_atm(vcc); 1234 skb_queue_tail(&sk->sk_receive_queue, skb); 1235 sk->sk_data_ready(sk, skb->len); 1236 dprintk("mpoa: purge_egress_shortcut: exiting:\n"); 1237 1238 return; 1239 } 1240 1241 /* 1242 * Our MPS died. Tell our daemon to send NHRP data plane purge to each 1243 * of the egress shortcuts we have. 1244 */ 1245 static void mps_death( struct k_message * msg, struct mpoa_client * mpc ) 1246 { 1247 eg_cache_entry *entry; 1248 1249 dprintk("mpoa: (%s) mps_death:\n", mpc->dev->name); 1250 1251 if(memcmp(msg->MPS_ctrl, mpc->mps_ctrl_addr, ATM_ESA_LEN)){ 1252 printk("mpoa: (%s) mps_death: wrong MPS\n", mpc->dev->name); 1253 return; 1254 } 1255 1256 /* FIXME: This knows too much of the cache structure */ 1257 read_lock_irq(&mpc->egress_lock); 1258 entry = mpc->eg_cache; 1259 while (entry != NULL) { 1260 purge_egress_shortcut(entry->shortcut, entry); 1261 entry = entry->next; 1262 } 1263 read_unlock_irq(&mpc->egress_lock); 1264 1265 mpc->in_ops->destroy_cache(mpc); 1266 mpc->eg_ops->destroy_cache(mpc); 1267 1268 return; 1269 } 1270 1271 static void MPOA_cache_impos_rcvd( struct k_message * msg, struct mpoa_client * mpc) 1272 { 1273 uint16_t holding_time; 1274 eg_cache_entry *entry = mpc->eg_ops->get_by_cache_id(msg->content.eg_info.cache_id, mpc); 1275 1276 holding_time = msg->content.eg_info.holding_time; 1277 dprintk("mpoa: (%s) MPOA_cache_impos_rcvd: entry = %p, holding_time = %u\n", 1278 mpc->dev->name, entry, holding_time); 1279 if(entry == NULL && holding_time) { 1280 entry = mpc->eg_ops->add_entry(msg, mpc); 1281 mpc->eg_ops->put(entry); 1282 return; 1283 } 1284 if(holding_time){ 1285 mpc->eg_ops->update(entry, holding_time); 1286 return; 1287 } 1288 1289 write_lock_irq(&mpc->egress_lock); 1290 mpc->eg_ops->remove_entry(entry, mpc); 1291 write_unlock_irq(&mpc->egress_lock); 1292 1293 mpc->eg_ops->put(entry); 1294 1295 return; 1296 } 1297 1298 static void set_mpc_ctrl_addr_rcvd(struct k_message *mesg, struct mpoa_client *mpc) 1299 { 1300 struct lec_priv *priv; 1301 int i, retval ; 1302 1303 uint8_t tlv[4 + 1 + 1 + 1 + ATM_ESA_LEN]; 1304 1305 tlv[0] = 00; tlv[1] = 0xa0; tlv[2] = 0x3e; tlv[3] = 0x2a; /* type */ 1306 tlv[4] = 1 + 1 + ATM_ESA_LEN; /* length */ 1307 tlv[5] = 0x02; /* MPOA client */ 1308 tlv[6] = 0x00; /* number of MPS MAC addresses */ 1309 1310 memcpy(&tlv[7], mesg->MPS_ctrl, ATM_ESA_LEN); /* MPC ctrl ATM addr */ 1311 memcpy(mpc->our_ctrl_addr, mesg->MPS_ctrl, ATM_ESA_LEN); 1312 1313 dprintk("mpoa: (%s) setting MPC ctrl ATM address to ", 1314 (mpc->dev) ? mpc->dev->name : "<unknown>"); 1315 for (i = 7; i < sizeof(tlv); i++) 1316 dprintk("%02x ", tlv[i]); 1317 dprintk("\n"); 1318 1319 if (mpc->dev) { 1320 priv = (struct lec_priv *)mpc->dev->priv; 1321 retval = priv->lane2_ops->associate_req(mpc->dev, mpc->dev->dev_addr, tlv, sizeof(tlv)); 1322 if (retval == 0) 1323 printk("mpoa: (%s) MPOA device type TLV association failed\n", mpc->dev->name); 1324 retval = priv->lane2_ops->resolve(mpc->dev, NULL, 1, NULL, NULL); 1325 if (retval < 0) 1326 printk("mpoa: (%s) targetless LE_ARP request failed\n", mpc->dev->name); 1327 } 1328 1329 return; 1330 } 1331 1332 static void set_mps_mac_addr_rcvd(struct k_message *msg, struct mpoa_client *client) 1333 { 1334 1335 if(client->number_of_mps_macs) 1336 kfree(client->mps_macs); 1337 client->number_of_mps_macs = 0; 1338 client->mps_macs = kmalloc(ETH_ALEN,GFP_KERNEL); 1339 if (client->mps_macs == NULL) { 1340 printk("mpoa: set_mps_mac_addr_rcvd: out of memory\n"); 1341 return; 1342 } 1343 client->number_of_mps_macs = 1; 1344 memcpy(client->mps_macs, msg->MPS_ctrl, ETH_ALEN); 1345 1346 return; 1347 } 1348 1349 /* 1350 * purge egress cache and tell daemon to 'action' (DIE, RELOAD) 1351 */ 1352 static void clean_up(struct k_message *msg, struct mpoa_client *mpc, int action) 1353 { 1354 1355 eg_cache_entry *entry; 1356 msg->type = SND_EGRESS_PURGE; 1357 1358 1359 /* FIXME: This knows too much of the cache structure */ 1360 read_lock_irq(&mpc->egress_lock); 1361 entry = mpc->eg_cache; 1362 while (entry != NULL){ 1363 msg->content.eg_info = entry->ctrl_info; 1364 dprintk("mpoa: cache_id %u\n", entry->ctrl_info.cache_id); 1365 msg_to_mpoad(msg, mpc); 1366 entry = entry->next; 1367 } 1368 read_unlock_irq(&mpc->egress_lock); 1369 1370 msg->type = action; 1371 msg_to_mpoad(msg, mpc); 1372 return; 1373 } 1374 1375 static void mpc_timer_refresh(void) 1376 { 1377 mpc_timer.expires = jiffies + (MPC_P2 * HZ); 1378 mpc_timer.data = mpc_timer.expires; 1379 mpc_timer.function = mpc_cache_check; 1380 add_timer(&mpc_timer); 1381 1382 return; 1383 } 1384 1385 static void mpc_cache_check( unsigned long checking_time ) 1386 { 1387 struct mpoa_client *mpc = mpcs; 1388 static unsigned long previous_resolving_check_time; 1389 static unsigned long previous_refresh_time; 1390 1391 while( mpc != NULL ){ 1392 mpc->in_ops->clear_count(mpc); 1393 mpc->eg_ops->clear_expired(mpc); 1394 if(checking_time - previous_resolving_check_time > mpc->parameters.mpc_p4 * HZ ){ 1395 mpc->in_ops->check_resolving(mpc); 1396 previous_resolving_check_time = checking_time; 1397 } 1398 if(checking_time - previous_refresh_time > mpc->parameters.mpc_p5 * HZ ){ 1399 mpc->in_ops->refresh(mpc); 1400 previous_refresh_time = checking_time; 1401 } 1402 mpc = mpc->next; 1403 } 1404 mpc_timer_refresh(); 1405 1406 return; 1407 } 1408 1409 static int atm_mpoa_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 1410 { 1411 int err = 0; 1412 struct atm_vcc *vcc = ATM_SD(sock); 1413 1414 if (cmd != ATMMPC_CTRL && cmd != ATMMPC_DATA) 1415 return -ENOIOCTLCMD; 1416 1417 if (!capable(CAP_NET_ADMIN)) 1418 return -EPERM; 1419 1420 switch (cmd) { 1421 case ATMMPC_CTRL: 1422 err = atm_mpoa_mpoad_attach(vcc, (int)arg); 1423 if (err >= 0) 1424 sock->state = SS_CONNECTED; 1425 break; 1426 case ATMMPC_DATA: 1427 err = atm_mpoa_vcc_attach(vcc, (void __user *)arg); 1428 break; 1429 default: 1430 break; 1431 } 1432 return err; 1433 } 1434 1435 1436 static struct atm_ioctl atm_ioctl_ops = { 1437 .owner = THIS_MODULE, 1438 .ioctl = atm_mpoa_ioctl, 1439 }; 1440 1441 static __init int atm_mpoa_init(void) 1442 { 1443 register_atm_ioctl(&atm_ioctl_ops); 1444 1445 #ifdef CONFIG_PROC_FS 1446 if (mpc_proc_init() != 0) 1447 printk(KERN_INFO "mpoa: failed to initialize /proc/mpoa\n"); 1448 else 1449 printk(KERN_INFO "mpoa: /proc/mpoa initialized\n"); 1450 #endif 1451 1452 printk("mpc.c: " __DATE__ " " __TIME__ " initialized\n"); 1453 1454 return 0; 1455 } 1456 1457 static void __exit atm_mpoa_cleanup(void) 1458 { 1459 struct mpoa_client *mpc, *tmp; 1460 struct atm_mpoa_qos *qos, *nextqos; 1461 struct lec_priv *priv; 1462 1463 #ifdef CONFIG_PROC_FS 1464 mpc_proc_clean(); 1465 #endif 1466 1467 del_timer(&mpc_timer); 1468 unregister_netdevice_notifier(&mpoa_notifier); 1469 deregister_atm_ioctl(&atm_ioctl_ops); 1470 1471 mpc = mpcs; 1472 mpcs = NULL; 1473 while (mpc != NULL) { 1474 tmp = mpc->next; 1475 if (mpc->dev != NULL) { 1476 stop_mpc(mpc); 1477 priv = (struct lec_priv *)mpc->dev->priv; 1478 if (priv->lane2_ops != NULL) 1479 priv->lane2_ops->associate_indicator = NULL; 1480 } 1481 ddprintk("mpoa: cleanup_module: about to clear caches\n"); 1482 mpc->in_ops->destroy_cache(mpc); 1483 mpc->eg_ops->destroy_cache(mpc); 1484 ddprintk("mpoa: cleanup_module: caches cleared\n"); 1485 kfree(mpc->mps_macs); 1486 memset(mpc, 0, sizeof(struct mpoa_client)); 1487 ddprintk("mpoa: cleanup_module: about to kfree %p\n", mpc); 1488 kfree(mpc); 1489 ddprintk("mpoa: cleanup_module: next mpc is at %p\n", tmp); 1490 mpc = tmp; 1491 } 1492 1493 qos = qos_head; 1494 qos_head = NULL; 1495 while (qos != NULL) { 1496 nextqos = qos->next; 1497 dprintk("mpoa: cleanup_module: freeing qos entry %p\n", qos); 1498 kfree(qos); 1499 qos = nextqos; 1500 } 1501 1502 return; 1503 } 1504 1505 module_init(atm_mpoa_init); 1506 module_exit(atm_mpoa_cleanup); 1507 1508 MODULE_LICENSE("GPL"); 1509