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 const uint8_t *copy_macs(struct mpoa_client *mpc, 66 const uint8_t *router_mac, 67 const uint8_t *tlvs, uint8_t mps_macs, 68 uint8_t device_type); 69 static void purge_egress_shortcut(struct atm_vcc *vcc, eg_cache_entry *entry); 70 71 static void send_set_mps_ctrl_addr(const char *addr, struct mpoa_client *mpc); 72 static void mpoad_close(struct atm_vcc *vcc); 73 static int msg_from_mpoad(struct atm_vcc *vcc, struct sk_buff *skb); 74 75 static void mpc_push(struct atm_vcc *vcc, struct sk_buff *skb); 76 static int mpc_send_packet(struct sk_buff *skb, struct net_device *dev); 77 static int mpoa_event_listener(struct notifier_block *mpoa_notifier, unsigned long event, void *dev); 78 static void mpc_timer_refresh(void); 79 static void mpc_cache_check( unsigned long checking_time ); 80 81 static struct llc_snap_hdr llc_snap_mpoa_ctrl = { 82 0xaa, 0xaa, 0x03, 83 {0x00, 0x00, 0x5e}, 84 {0x00, 0x03} /* For MPOA control PDUs */ 85 }; 86 static struct llc_snap_hdr llc_snap_mpoa_data = { 87 0xaa, 0xaa, 0x03, 88 {0x00, 0x00, 0x00}, 89 {0x08, 0x00} /* This is for IP PDUs only */ 90 }; 91 static struct llc_snap_hdr llc_snap_mpoa_data_tagged = { 92 0xaa, 0xaa, 0x03, 93 {0x00, 0x00, 0x00}, 94 {0x88, 0x4c} /* This is for tagged data PDUs */ 95 }; 96 97 static struct notifier_block mpoa_notifier = { 98 mpoa_event_listener, 99 NULL, 100 0 101 }; 102 103 struct mpoa_client *mpcs = NULL; /* FIXME */ 104 static struct atm_mpoa_qos *qos_head = NULL; 105 static DEFINE_TIMER(mpc_timer, NULL, 0, 0); 106 107 108 static struct mpoa_client *find_mpc_by_itfnum(int itf) 109 { 110 struct mpoa_client *mpc; 111 112 mpc = mpcs; /* our global linked list */ 113 while (mpc != NULL) { 114 if (mpc->dev_num == itf) 115 return mpc; 116 mpc = mpc->next; 117 } 118 119 return NULL; /* not found */ 120 } 121 122 static struct mpoa_client *find_mpc_by_vcc(struct atm_vcc *vcc) 123 { 124 struct mpoa_client *mpc; 125 126 mpc = mpcs; /* our global linked list */ 127 while (mpc != NULL) { 128 if (mpc->mpoad_vcc == vcc) 129 return mpc; 130 mpc = mpc->next; 131 } 132 133 return NULL; /* not found */ 134 } 135 136 static struct mpoa_client *find_mpc_by_lec(struct net_device *dev) 137 { 138 struct mpoa_client *mpc; 139 140 mpc = mpcs; /* our global linked list */ 141 while (mpc != NULL) { 142 if (mpc->dev == dev) 143 return mpc; 144 mpc = mpc->next; 145 } 146 147 return NULL; /* not found */ 148 } 149 150 /* 151 * Functions for managing QoS list 152 */ 153 154 /* 155 * Overwrites the old entry or makes a new one. 156 */ 157 struct atm_mpoa_qos *atm_mpoa_add_qos(__be32 dst_ip, struct atm_qos *qos) 158 { 159 struct atm_mpoa_qos *entry; 160 161 entry = atm_mpoa_search_qos(dst_ip); 162 if (entry != NULL) { 163 entry->qos = *qos; 164 return entry; 165 } 166 167 entry = kmalloc(sizeof(struct atm_mpoa_qos), GFP_KERNEL); 168 if (entry == NULL) { 169 printk("mpoa: atm_mpoa_add_qos: out of memory\n"); 170 return entry; 171 } 172 173 entry->ipaddr = dst_ip; 174 entry->qos = *qos; 175 176 entry->next = qos_head; 177 qos_head = entry; 178 179 return entry; 180 } 181 182 struct atm_mpoa_qos *atm_mpoa_search_qos(__be32 dst_ip) 183 { 184 struct atm_mpoa_qos *qos; 185 186 qos = qos_head; 187 while( qos != NULL ){ 188 if(qos->ipaddr == dst_ip) { 189 break; 190 } 191 qos = qos->next; 192 } 193 194 return qos; 195 } 196 197 /* 198 * Returns 0 for failure 199 */ 200 int atm_mpoa_delete_qos(struct atm_mpoa_qos *entry) 201 { 202 203 struct atm_mpoa_qos *curr; 204 205 if (entry == NULL) return 0; 206 if (entry == qos_head) { 207 qos_head = qos_head->next; 208 kfree(entry); 209 return 1; 210 } 211 212 curr = qos_head; 213 while (curr != NULL) { 214 if (curr->next == entry) { 215 curr->next = entry->next; 216 kfree(entry); 217 return 1; 218 } 219 curr = curr->next; 220 } 221 222 return 0; 223 } 224 225 /* this is buggered - we need locking for qos_head */ 226 void atm_mpoa_disp_qos(struct seq_file *m) 227 { 228 struct atm_mpoa_qos *qos; 229 230 qos = qos_head; 231 seq_printf(m, "QoS entries for shortcuts:\n"); 232 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"); 233 234 while (qos != NULL) { 235 seq_printf(m, "%pI4\n %-7d %-7d %-7d %-7d %-7d\n %-7d %-7d %-7d %-7d %-7d\n", 236 &qos->ipaddr, 237 qos->qos.txtp.max_pcr, qos->qos.txtp.pcr, qos->qos.txtp.min_pcr, qos->qos.txtp.max_cdv, qos->qos.txtp.max_sdu, 238 qos->qos.rxtp.max_pcr, qos->qos.rxtp.pcr, qos->qos.rxtp.min_pcr, qos->qos.rxtp.max_cdv, qos->qos.rxtp.max_sdu); 239 qos = qos->next; 240 } 241 } 242 243 static struct net_device *find_lec_by_itfnum(int itf) 244 { 245 struct net_device *dev; 246 char name[IFNAMSIZ]; 247 248 sprintf(name, "lec%d", itf); 249 dev = dev_get_by_name(&init_net, name); 250 251 return dev; 252 } 253 254 static struct mpoa_client *alloc_mpc(void) 255 { 256 struct mpoa_client *mpc; 257 258 mpc = kzalloc(sizeof (struct mpoa_client), GFP_KERNEL); 259 if (mpc == NULL) 260 return NULL; 261 rwlock_init(&mpc->ingress_lock); 262 rwlock_init(&mpc->egress_lock); 263 mpc->next = mpcs; 264 atm_mpoa_init_cache(mpc); 265 266 mpc->parameters.mpc_p1 = MPC_P1; 267 mpc->parameters.mpc_p2 = MPC_P2; 268 memset(mpc->parameters.mpc_p3,0,sizeof(mpc->parameters.mpc_p3)); 269 mpc->parameters.mpc_p4 = MPC_P4; 270 mpc->parameters.mpc_p5 = MPC_P5; 271 mpc->parameters.mpc_p6 = MPC_P6; 272 273 mpcs = mpc; 274 275 return mpc; 276 } 277 278 /* 279 * 280 * start_mpc() puts the MPC on line. All the packets destined 281 * to the lec underneath us are now being monitored and 282 * shortcuts will be established. 283 * 284 */ 285 static void start_mpc(struct mpoa_client *mpc, struct net_device *dev) 286 { 287 288 dprintk("mpoa: (%s) start_mpc:\n", mpc->dev->name); 289 if (dev->hard_start_xmit == NULL) { 290 printk("mpoa: (%s) start_mpc: dev->hard_start_xmit == NULL, not starting\n", 291 dev->name); 292 return; 293 } 294 mpc->old_hard_start_xmit = dev->hard_start_xmit; 295 dev->hard_start_xmit = mpc_send_packet; 296 297 return; 298 } 299 300 static void stop_mpc(struct mpoa_client *mpc) 301 { 302 303 dprintk("mpoa: (%s) stop_mpc:", mpc->dev->name); 304 305 /* Lets not nullify lec device's dev->hard_start_xmit */ 306 if (mpc->dev->hard_start_xmit != mpc_send_packet) { 307 dprintk(" mpc already stopped, not fatal\n"); 308 return; 309 } 310 dprintk("\n"); 311 mpc->dev->hard_start_xmit = mpc->old_hard_start_xmit; 312 mpc->old_hard_start_xmit = NULL; 313 /* close_shortcuts(mpc); ??? FIXME */ 314 315 return; 316 } 317 318 static const char *mpoa_device_type_string(char type) __attribute__ ((unused)); 319 320 static const char *mpoa_device_type_string(char type) 321 { 322 switch(type) { 323 case NON_MPOA: 324 return "non-MPOA device"; 325 break; 326 case MPS: 327 return "MPS"; 328 break; 329 case MPC: 330 return "MPC"; 331 break; 332 case MPS_AND_MPC: 333 return "both MPS and MPC"; 334 break; 335 default: 336 return "unspecified (non-MPOA) device"; 337 break; 338 } 339 340 return ""; /* not reached */ 341 } 342 343 /* 344 * lec device calls this via its netdev_priv(dev)->lane2_ops 345 * ->associate_indicator() when it sees a TLV in LE_ARP packet. 346 * We fill in the pointer above when we see a LANE2 lec initializing 347 * See LANE2 spec 3.1.5 348 * 349 * Quite a big and ugly function but when you look at it 350 * all it does is to try to locate and parse MPOA Device 351 * Type TLV. 352 * We give our lec a pointer to this function and when the 353 * lec sees a TLV it uses the pointer to call this function. 354 * 355 */ 356 static void lane2_assoc_ind(struct net_device *dev, const u8 *mac_addr, 357 const u8 *tlvs, u32 sizeoftlvs) 358 { 359 uint32_t type; 360 uint8_t length, mpoa_device_type, number_of_mps_macs; 361 const uint8_t *end_of_tlvs; 362 struct mpoa_client *mpc; 363 364 mpoa_device_type = number_of_mps_macs = 0; /* silence gcc */ 365 dprintk("mpoa: (%s) lane2_assoc_ind: received TLV(s), ", dev->name); 366 dprintk("total length of all TLVs %d\n", sizeoftlvs); 367 mpc = find_mpc_by_lec(dev); /* Sampo-Fix: moved here from below */ 368 if (mpc == NULL) { 369 printk("mpoa: (%s) lane2_assoc_ind: no mpc\n", dev->name); 370 return; 371 } 372 end_of_tlvs = tlvs + sizeoftlvs; 373 while (end_of_tlvs - tlvs >= 5) { 374 type = (tlvs[0] << 24) | (tlvs[1] << 16) | (tlvs[2] << 8) | tlvs[3]; 375 length = tlvs[4]; 376 tlvs += 5; 377 dprintk(" type 0x%x length %02x\n", type, length); 378 if (tlvs + length > end_of_tlvs) { 379 printk("TLV value extends past its buffer, aborting parse\n"); 380 return; 381 } 382 383 if (type == 0) { 384 printk("mpoa: (%s) lane2_assoc_ind: TLV type was 0, returning\n", dev->name); 385 return; 386 } 387 388 if (type != TLV_MPOA_DEVICE_TYPE) { 389 tlvs += length; 390 continue; /* skip other TLVs */ 391 } 392 mpoa_device_type = *tlvs++; 393 number_of_mps_macs = *tlvs++; 394 dprintk("mpoa: (%s) MPOA device type '%s', ", dev->name, mpoa_device_type_string(mpoa_device_type)); 395 if (mpoa_device_type == MPS_AND_MPC && 396 length < (42 + number_of_mps_macs*ETH_ALEN)) { /* :) */ 397 printk("\nmpoa: (%s) lane2_assoc_ind: short MPOA Device Type TLV\n", 398 dev->name); 399 continue; 400 } 401 if ((mpoa_device_type == MPS || mpoa_device_type == MPC) 402 && length < 22 + number_of_mps_macs*ETH_ALEN) { 403 printk("\nmpoa: (%s) lane2_assoc_ind: short MPOA Device Type TLV\n", 404 dev->name); 405 continue; 406 } 407 if (mpoa_device_type != MPS && mpoa_device_type != MPS_AND_MPC) { 408 dprintk("ignoring non-MPS device\n"); 409 if (mpoa_device_type == MPC) tlvs += 20; 410 continue; /* we are only interested in MPSs */ 411 } 412 if (number_of_mps_macs == 0 && mpoa_device_type == MPS_AND_MPC) { 413 printk("\nmpoa: (%s) lane2_assoc_ind: MPS_AND_MPC has zero MACs\n", dev->name); 414 continue; /* someone should read the spec */ 415 } 416 dprintk("this MPS has %d MAC addresses\n", number_of_mps_macs); 417 418 /* ok, now we can go and tell our daemon the control address of MPS */ 419 send_set_mps_ctrl_addr(tlvs, mpc); 420 421 tlvs = copy_macs(mpc, mac_addr, tlvs, number_of_mps_macs, mpoa_device_type); 422 if (tlvs == NULL) return; 423 } 424 if (end_of_tlvs - tlvs != 0) 425 printk("mpoa: (%s) lane2_assoc_ind: ignoring %Zd bytes of trailing TLV carbage\n", 426 dev->name, end_of_tlvs - tlvs); 427 return; 428 } 429 430 /* 431 * Store at least advertizing router's MAC address 432 * plus the possible MAC address(es) to mpc->mps_macs. 433 * For a freshly allocated MPOA client mpc->mps_macs == 0. 434 */ 435 static const uint8_t *copy_macs(struct mpoa_client *mpc, 436 const uint8_t *router_mac, 437 const uint8_t *tlvs, uint8_t mps_macs, 438 uint8_t device_type) 439 { 440 int num_macs; 441 num_macs = (mps_macs > 1) ? mps_macs : 1; 442 443 if (mpc->number_of_mps_macs != num_macs) { /* need to reallocate? */ 444 if (mpc->number_of_mps_macs != 0) kfree(mpc->mps_macs); 445 mpc->number_of_mps_macs = 0; 446 mpc->mps_macs = kmalloc(num_macs*ETH_ALEN, GFP_KERNEL); 447 if (mpc->mps_macs == NULL) { 448 printk("mpoa: (%s) copy_macs: out of mem\n", mpc->dev->name); 449 return NULL; 450 } 451 } 452 memcpy(mpc->mps_macs, router_mac, ETH_ALEN); 453 tlvs += 20; if (device_type == MPS_AND_MPC) tlvs += 20; 454 if (mps_macs > 0) 455 memcpy(mpc->mps_macs, tlvs, mps_macs*ETH_ALEN); 456 tlvs += mps_macs*ETH_ALEN; 457 mpc->number_of_mps_macs = num_macs; 458 459 return tlvs; 460 } 461 462 static int send_via_shortcut(struct sk_buff *skb, struct mpoa_client *mpc) 463 { 464 in_cache_entry *entry; 465 struct iphdr *iph; 466 char *buff; 467 __be32 ipaddr = 0; 468 469 static struct { 470 struct llc_snap_hdr hdr; 471 __be32 tag; 472 } tagged_llc_snap_hdr = { 473 {0xaa, 0xaa, 0x03, {0x00, 0x00, 0x00}, {0x88, 0x4c}}, 474 0 475 }; 476 477 buff = skb->data + mpc->dev->hard_header_len; 478 iph = (struct iphdr *)buff; 479 ipaddr = iph->daddr; 480 481 ddprintk("mpoa: (%s) send_via_shortcut: ipaddr 0x%x\n", mpc->dev->name, ipaddr); 482 483 entry = mpc->in_ops->get(ipaddr, mpc); 484 if (entry == NULL) { 485 entry = mpc->in_ops->add_entry(ipaddr, mpc); 486 if (entry != NULL) mpc->in_ops->put(entry); 487 return 1; 488 } 489 if (mpc->in_ops->cache_hit(entry, mpc) != OPEN){ /* threshold not exceeded or VCC not ready */ 490 ddprintk("mpoa: (%s) send_via_shortcut: cache_hit: returns != OPEN\n", mpc->dev->name); 491 mpc->in_ops->put(entry); 492 return 1; 493 } 494 495 ddprintk("mpoa: (%s) send_via_shortcut: using shortcut\n", mpc->dev->name); 496 /* MPOA spec A.1.4, MPOA client must decrement IP ttl at least by one */ 497 if (iph->ttl <= 1) { 498 ddprintk("mpoa: (%s) send_via_shortcut: IP ttl = %u, using LANE\n", mpc->dev->name, iph->ttl); 499 mpc->in_ops->put(entry); 500 return 1; 501 } 502 iph->ttl--; 503 iph->check = 0; 504 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl); 505 506 if (entry->ctrl_info.tag != 0) { 507 ddprintk("mpoa: (%s) send_via_shortcut: adding tag 0x%x\n", mpc->dev->name, entry->ctrl_info.tag); 508 tagged_llc_snap_hdr.tag = entry->ctrl_info.tag; 509 skb_pull(skb, ETH_HLEN); /* get rid of Eth header */ 510 skb_push(skb, sizeof(tagged_llc_snap_hdr)); /* add LLC/SNAP header */ 511 skb_copy_to_linear_data(skb, &tagged_llc_snap_hdr, 512 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 skb_copy_to_linear_data(skb, &llc_snap_mpoa_data, 517 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 /* Weed out funny packets (e.g., AF_PACKET or raw). */ 550 if (skb->len < ETH_HLEN + sizeof(struct iphdr)) 551 goto non_ip; 552 skb_set_network_header(skb, ETH_HLEN); 553 if (skb->len < ETH_HLEN + ip_hdr(skb)->ihl * 4 || ip_hdr(skb)->ihl < 5) 554 goto non_ip; 555 556 while (i < mpc->number_of_mps_macs) { 557 if (!compare_ether_addr(eth->h_dest, (mpc->mps_macs + i*ETH_ALEN))) 558 if ( send_via_shortcut(skb, mpc) == 0 ) /* try shortcut */ 559 return 0; /* success! */ 560 i++; 561 } 562 563 non_ip: 564 retval = mpc->old_hard_start_xmit(skb,dev); 565 566 return retval; 567 } 568 569 static int atm_mpoa_vcc_attach(struct atm_vcc *vcc, void __user *arg) 570 { 571 int bytes_left; 572 struct mpoa_client *mpc; 573 struct atmmpc_ioc ioc_data; 574 in_cache_entry *in_entry; 575 __be32 ipaddr; 576 577 bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmmpc_ioc)); 578 if (bytes_left != 0) { 579 printk("mpoa: mpc_vcc_attach: Short read (missed %d bytes) from userland\n", bytes_left); 580 return -EFAULT; 581 } 582 ipaddr = ioc_data.ipaddr; 583 if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF) 584 return -EINVAL; 585 586 mpc = find_mpc_by_itfnum(ioc_data.dev_num); 587 if (mpc == NULL) 588 return -EINVAL; 589 590 if (ioc_data.type == MPC_SOCKET_INGRESS) { 591 in_entry = mpc->in_ops->get(ipaddr, mpc); 592 if (in_entry == NULL || in_entry->entry_state < INGRESS_RESOLVED) { 593 printk("mpoa: (%s) mpc_vcc_attach: did not find RESOLVED entry from ingress cache\n", 594 mpc->dev->name); 595 if (in_entry != NULL) mpc->in_ops->put(in_entry); 596 return -EINVAL; 597 } 598 printk("mpoa: (%s) mpc_vcc_attach: attaching ingress SVC, entry = %pI4\n", 599 mpc->dev->name, &in_entry->ctrl_info.in_dst_ip); 600 in_entry->shortcut = vcc; 601 mpc->in_ops->put(in_entry); 602 } else { 603 printk("mpoa: (%s) mpc_vcc_attach: attaching egress SVC\n", mpc->dev->name); 604 } 605 606 vcc->proto_data = mpc->dev; 607 vcc->push = mpc_push; 608 609 return 0; 610 } 611 612 /* 613 * 614 */ 615 static void mpc_vcc_close(struct atm_vcc *vcc, struct net_device *dev) 616 { 617 struct mpoa_client *mpc; 618 in_cache_entry *in_entry; 619 eg_cache_entry *eg_entry; 620 621 mpc = find_mpc_by_lec(dev); 622 if (mpc == NULL) { 623 printk("mpoa: (%s) mpc_vcc_close: close for unknown MPC\n", dev->name); 624 return; 625 } 626 627 dprintk("mpoa: (%s) mpc_vcc_close:\n", dev->name); 628 in_entry = mpc->in_ops->get_by_vcc(vcc, mpc); 629 if (in_entry) { 630 dprintk("mpoa: (%s) mpc_vcc_close: ingress SVC closed ip = %pI4\n", 631 mpc->dev->name, &in_entry->ctrl_info.in_dst_ip); 632 in_entry->shortcut = NULL; 633 mpc->in_ops->put(in_entry); 634 } 635 eg_entry = mpc->eg_ops->get_by_vcc(vcc, mpc); 636 if (eg_entry) { 637 dprintk("mpoa: (%s) mpc_vcc_close: egress SVC closed\n", mpc->dev->name); 638 eg_entry->shortcut = NULL; 639 mpc->eg_ops->put(eg_entry); 640 } 641 642 if (in_entry == NULL && eg_entry == NULL) 643 dprintk("mpoa: (%s) mpc_vcc_close: unused vcc closed\n", dev->name); 644 645 return; 646 } 647 648 static void mpc_push(struct atm_vcc *vcc, struct sk_buff *skb) 649 { 650 struct net_device *dev = (struct net_device *)vcc->proto_data; 651 struct sk_buff *new_skb; 652 eg_cache_entry *eg; 653 struct mpoa_client *mpc; 654 __be32 tag; 655 char *tmp; 656 657 ddprintk("mpoa: (%s) mpc_push:\n", dev->name); 658 if (skb == NULL) { 659 dprintk("mpoa: (%s) mpc_push: null skb, closing VCC\n", dev->name); 660 mpc_vcc_close(vcc, dev); 661 return; 662 } 663 664 skb->dev = dev; 665 if (memcmp(skb->data, &llc_snap_mpoa_ctrl, sizeof(struct llc_snap_hdr)) == 0) { 666 struct sock *sk = sk_atm(vcc); 667 668 dprintk("mpoa: (%s) mpc_push: control packet arrived\n", dev->name); 669 /* Pass control packets to daemon */ 670 skb_queue_tail(&sk->sk_receive_queue, skb); 671 sk->sk_data_ready(sk, skb->len); 672 return; 673 } 674 675 /* data coming over the shortcut */ 676 atm_return(vcc, skb->truesize); 677 678 mpc = find_mpc_by_lec(dev); 679 if (mpc == NULL) { 680 printk("mpoa: (%s) mpc_push: unknown MPC\n", dev->name); 681 return; 682 } 683 684 if (memcmp(skb->data, &llc_snap_mpoa_data_tagged, sizeof(struct llc_snap_hdr)) == 0) { /* MPOA tagged data */ 685 ddprintk("mpoa: (%s) mpc_push: tagged data packet arrived\n", dev->name); 686 687 } else if (memcmp(skb->data, &llc_snap_mpoa_data, sizeof(struct llc_snap_hdr)) == 0) { /* MPOA data */ 688 printk("mpoa: (%s) mpc_push: non-tagged data packet arrived\n", dev->name); 689 printk(" mpc_push: non-tagged data unsupported, purging\n"); 690 dev_kfree_skb_any(skb); 691 return; 692 } else { 693 printk("mpoa: (%s) mpc_push: garbage arrived, purging\n", dev->name); 694 dev_kfree_skb_any(skb); 695 return; 696 } 697 698 tmp = skb->data + sizeof(struct llc_snap_hdr); 699 tag = *(__be32 *)tmp; 700 701 eg = mpc->eg_ops->get_by_tag(tag, mpc); 702 if (eg == NULL) { 703 printk("mpoa: (%s) mpc_push: Didn't find egress cache entry, tag = %u\n", 704 dev->name,tag); 705 purge_egress_shortcut(vcc, NULL); 706 dev_kfree_skb_any(skb); 707 return; 708 } 709 710 /* 711 * See if ingress MPC is using shortcut we opened as a return channel. 712 * This means we have a bi-directional vcc opened by us. 713 */ 714 if (eg->shortcut == NULL) { 715 eg->shortcut = vcc; 716 printk("mpoa: (%s) mpc_push: egress SVC in use\n", dev->name); 717 } 718 719 skb_pull(skb, sizeof(struct llc_snap_hdr) + sizeof(tag)); /* get rid of LLC/SNAP header */ 720 new_skb = skb_realloc_headroom(skb, eg->ctrl_info.DH_length); /* LLC/SNAP is shorter than MAC header :( */ 721 dev_kfree_skb_any(skb); 722 if (new_skb == NULL){ 723 mpc->eg_ops->put(eg); 724 return; 725 } 726 skb_push(new_skb, eg->ctrl_info.DH_length); /* add MAC header */ 727 skb_copy_to_linear_data(new_skb, eg->ctrl_info.DLL_header, 728 eg->ctrl_info.DH_length); 729 new_skb->protocol = eth_type_trans(new_skb, dev); 730 skb_reset_network_header(new_skb); 731 732 eg->latest_ip_addr = ip_hdr(new_skb)->saddr; 733 eg->packets_rcvd++; 734 mpc->eg_ops->put(eg); 735 736 memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data)); 737 netif_rx(new_skb); 738 739 return; 740 } 741 742 static struct atmdev_ops mpc_ops = { /* only send is required */ 743 .close = mpoad_close, 744 .send = msg_from_mpoad 745 }; 746 747 static struct atm_dev mpc_dev = { 748 .ops = &mpc_ops, 749 .type = "mpc", 750 .number = 42, 751 .lock = __SPIN_LOCK_UNLOCKED(mpc_dev.lock) 752 /* members not explicitly initialised will be 0 */ 753 }; 754 755 static int atm_mpoa_mpoad_attach (struct atm_vcc *vcc, int arg) 756 { 757 struct mpoa_client *mpc; 758 struct lec_priv *priv; 759 int err; 760 761 if (mpcs == NULL) { 762 init_timer(&mpc_timer); 763 mpc_timer_refresh(); 764 765 /* This lets us now how our LECs are doing */ 766 err = register_netdevice_notifier(&mpoa_notifier); 767 if (err < 0) { 768 del_timer(&mpc_timer); 769 return err; 770 } 771 } 772 773 mpc = find_mpc_by_itfnum(arg); 774 if (mpc == NULL) { 775 dprintk("mpoa: mpoad_attach: allocating new mpc for itf %d\n", arg); 776 mpc = alloc_mpc(); 777 if (mpc == NULL) 778 return -ENOMEM; 779 mpc->dev_num = arg; 780 mpc->dev = find_lec_by_itfnum(arg); /* NULL if there was no lec */ 781 } 782 if (mpc->mpoad_vcc) { 783 printk("mpoa: mpoad_attach: mpoad is already present for itf %d\n", arg); 784 return -EADDRINUSE; 785 } 786 787 if (mpc->dev) { /* check if the lec is LANE2 capable */ 788 priv = netdev_priv(mpc->dev); 789 if (priv->lane_version < 2) { 790 dev_put(mpc->dev); 791 mpc->dev = NULL; 792 } else 793 priv->lane2_ops->associate_indicator = lane2_assoc_ind; 794 } 795 796 mpc->mpoad_vcc = vcc; 797 vcc->dev = &mpc_dev; 798 vcc_insert_socket(sk_atm(vcc)); 799 set_bit(ATM_VF_META,&vcc->flags); 800 set_bit(ATM_VF_READY,&vcc->flags); 801 802 if (mpc->dev) { 803 char empty[ATM_ESA_LEN]; 804 memset(empty, 0, ATM_ESA_LEN); 805 806 start_mpc(mpc, mpc->dev); 807 /* set address if mpcd e.g. gets killed and restarted. 808 * If we do not do it now we have to wait for the next LE_ARP 809 */ 810 if ( memcmp(mpc->mps_ctrl_addr, empty, ATM_ESA_LEN) != 0 ) 811 send_set_mps_ctrl_addr(mpc->mps_ctrl_addr, mpc); 812 } 813 814 __module_get(THIS_MODULE); 815 return arg; 816 } 817 818 static void send_set_mps_ctrl_addr(const char *addr, struct mpoa_client *mpc) 819 { 820 struct k_message mesg; 821 822 memcpy (mpc->mps_ctrl_addr, addr, ATM_ESA_LEN); 823 824 mesg.type = SET_MPS_CTRL_ADDR; 825 memcpy(mesg.MPS_ctrl, addr, ATM_ESA_LEN); 826 msg_to_mpoad(&mesg, mpc); 827 828 return; 829 } 830 831 static void mpoad_close(struct atm_vcc *vcc) 832 { 833 struct mpoa_client *mpc; 834 struct sk_buff *skb; 835 836 mpc = find_mpc_by_vcc(vcc); 837 if (mpc == NULL) { 838 printk("mpoa: mpoad_close: did not find MPC\n"); 839 return; 840 } 841 if (!mpc->mpoad_vcc) { 842 printk("mpoa: mpoad_close: close for non-present mpoad\n"); 843 return; 844 } 845 846 mpc->mpoad_vcc = NULL; 847 if (mpc->dev) { 848 struct lec_priv *priv = netdev_priv(mpc->dev); 849 priv->lane2_ops->associate_indicator = NULL; 850 stop_mpc(mpc); 851 dev_put(mpc->dev); 852 } 853 854 mpc->in_ops->destroy_cache(mpc); 855 mpc->eg_ops->destroy_cache(mpc); 856 857 while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue))) { 858 atm_return(vcc, skb->truesize); 859 kfree_skb(skb); 860 } 861 862 printk("mpoa: (%s) going down\n", 863 (mpc->dev) ? mpc->dev->name : "<unknown>"); 864 module_put(THIS_MODULE); 865 866 return; 867 } 868 869 /* 870 * 871 */ 872 static int msg_from_mpoad(struct atm_vcc *vcc, struct sk_buff *skb) 873 { 874 875 struct mpoa_client *mpc = find_mpc_by_vcc(vcc); 876 struct k_message *mesg = (struct k_message*)skb->data; 877 atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); 878 879 if (mpc == NULL) { 880 printk("mpoa: msg_from_mpoad: no mpc found\n"); 881 return 0; 882 } 883 dprintk("mpoa: (%s) msg_from_mpoad:", (mpc->dev) ? mpc->dev->name : "<unknown>"); 884 switch(mesg->type) { 885 case MPOA_RES_REPLY_RCVD: 886 dprintk(" mpoa_res_reply_rcvd\n"); 887 MPOA_res_reply_rcvd(mesg, mpc); 888 break; 889 case MPOA_TRIGGER_RCVD: 890 dprintk(" mpoa_trigger_rcvd\n"); 891 MPOA_trigger_rcvd(mesg, mpc); 892 break; 893 case INGRESS_PURGE_RCVD: 894 dprintk(" nhrp_purge_rcvd\n"); 895 ingress_purge_rcvd(mesg, mpc); 896 break; 897 case EGRESS_PURGE_RCVD: 898 dprintk(" egress_purge_reply_rcvd\n"); 899 egress_purge_rcvd(mesg, mpc); 900 break; 901 case MPS_DEATH: 902 dprintk(" mps_death\n"); 903 mps_death(mesg, mpc); 904 break; 905 case CACHE_IMPOS_RCVD: 906 dprintk(" cache_impos_rcvd\n"); 907 MPOA_cache_impos_rcvd(mesg, mpc); 908 break; 909 case SET_MPC_CTRL_ADDR: 910 dprintk(" set_mpc_ctrl_addr\n"); 911 set_mpc_ctrl_addr_rcvd(mesg, mpc); 912 break; 913 case SET_MPS_MAC_ADDR: 914 dprintk(" set_mps_mac_addr\n"); 915 set_mps_mac_addr_rcvd(mesg, mpc); 916 break; 917 case CLEAN_UP_AND_EXIT: 918 dprintk(" clean_up_and_exit\n"); 919 clean_up(mesg, mpc, DIE); 920 break; 921 case RELOAD: 922 dprintk(" reload\n"); 923 clean_up(mesg, mpc, RELOAD); 924 break; 925 case SET_MPC_PARAMS: 926 dprintk(" set_mpc_params\n"); 927 mpc->parameters = mesg->content.params; 928 break; 929 default: 930 dprintk(" unknown message %d\n", mesg->type); 931 break; 932 } 933 kfree_skb(skb); 934 935 return 0; 936 } 937 938 /* Remember that this function may not do things that sleep */ 939 int msg_to_mpoad(struct k_message *mesg, struct mpoa_client *mpc) 940 { 941 struct sk_buff *skb; 942 struct sock *sk; 943 944 if (mpc == NULL || !mpc->mpoad_vcc) { 945 printk("mpoa: msg_to_mpoad: mesg %d to a non-existent mpoad\n", mesg->type); 946 return -ENXIO; 947 } 948 949 skb = alloc_skb(sizeof(struct k_message), GFP_ATOMIC); 950 if (skb == NULL) 951 return -ENOMEM; 952 skb_put(skb, sizeof(struct k_message)); 953 skb_copy_to_linear_data(skb, mesg, sizeof(*mesg)); 954 atm_force_charge(mpc->mpoad_vcc, skb->truesize); 955 956 sk = sk_atm(mpc->mpoad_vcc); 957 skb_queue_tail(&sk->sk_receive_queue, skb); 958 sk->sk_data_ready(sk, skb->len); 959 960 return 0; 961 } 962 963 static int mpoa_event_listener(struct notifier_block *mpoa_notifier, unsigned long event, void *dev_ptr) 964 { 965 struct net_device *dev; 966 struct mpoa_client *mpc; 967 struct lec_priv *priv; 968 969 dev = (struct net_device *)dev_ptr; 970 971 if (!net_eq(dev_net(dev), &init_net)) 972 return NOTIFY_DONE; 973 974 if (dev->name == NULL || strncmp(dev->name, "lec", 3)) 975 return NOTIFY_DONE; /* we are only interested in lec:s */ 976 977 switch (event) { 978 case NETDEV_REGISTER: /* a new lec device was allocated */ 979 priv = netdev_priv(dev); 980 if (priv->lane_version < 2) 981 break; 982 priv->lane2_ops->associate_indicator = lane2_assoc_ind; 983 mpc = find_mpc_by_itfnum(priv->itfnum); 984 if (mpc == NULL) { 985 dprintk("mpoa: mpoa_event_listener: allocating new mpc for %s\n", 986 dev->name); 987 mpc = alloc_mpc(); 988 if (mpc == NULL) { 989 printk("mpoa: mpoa_event_listener: no new mpc"); 990 break; 991 } 992 } 993 mpc->dev_num = priv->itfnum; 994 mpc->dev = dev; 995 dev_hold(dev); 996 dprintk("mpoa: (%s) was initialized\n", dev->name); 997 break; 998 case NETDEV_UNREGISTER: 999 /* the lec device was deallocated */ 1000 mpc = find_mpc_by_lec(dev); 1001 if (mpc == NULL) 1002 break; 1003 dprintk("mpoa: device (%s) was deallocated\n", dev->name); 1004 stop_mpc(mpc); 1005 dev_put(mpc->dev); 1006 mpc->dev = NULL; 1007 break; 1008 case NETDEV_UP: 1009 /* the dev was ifconfig'ed up */ 1010 mpc = find_mpc_by_lec(dev); 1011 if (mpc == NULL) 1012 break; 1013 if (mpc->mpoad_vcc != NULL) { 1014 start_mpc(mpc, dev); 1015 } 1016 break; 1017 case NETDEV_DOWN: 1018 /* the dev was ifconfig'ed down */ 1019 /* this means that the flow of packets from the 1020 * upper layer stops 1021 */ 1022 mpc = find_mpc_by_lec(dev); 1023 if (mpc == NULL) 1024 break; 1025 if (mpc->mpoad_vcc != NULL) { 1026 stop_mpc(mpc); 1027 } 1028 break; 1029 case NETDEV_REBOOT: 1030 case NETDEV_CHANGE: 1031 case NETDEV_CHANGEMTU: 1032 case NETDEV_CHANGEADDR: 1033 case NETDEV_GOING_DOWN: 1034 break; 1035 default: 1036 break; 1037 } 1038 1039 return NOTIFY_DONE; 1040 } 1041 1042 /* 1043 * Functions which are called after a message is received from mpcd. 1044 * Msg is reused on purpose. 1045 */ 1046 1047 1048 static void MPOA_trigger_rcvd(struct k_message *msg, struct mpoa_client *mpc) 1049 { 1050 __be32 dst_ip = msg->content.in_info.in_dst_ip; 1051 in_cache_entry *entry; 1052 1053 entry = mpc->in_ops->get(dst_ip, mpc); 1054 if(entry == NULL){ 1055 entry = mpc->in_ops->add_entry(dst_ip, mpc); 1056 entry->entry_state = INGRESS_RESOLVING; 1057 msg->type = SND_MPOA_RES_RQST; 1058 msg->content.in_info = entry->ctrl_info; 1059 msg_to_mpoad(msg, mpc); 1060 do_gettimeofday(&(entry->reply_wait)); 1061 mpc->in_ops->put(entry); 1062 return; 1063 } 1064 1065 if(entry->entry_state == INGRESS_INVALID){ 1066 entry->entry_state = INGRESS_RESOLVING; 1067 msg->type = SND_MPOA_RES_RQST; 1068 msg->content.in_info = entry->ctrl_info; 1069 msg_to_mpoad(msg, mpc); 1070 do_gettimeofday(&(entry->reply_wait)); 1071 mpc->in_ops->put(entry); 1072 return; 1073 } 1074 1075 printk("mpoa: (%s) MPOA_trigger_rcvd: entry already in resolving state\n", 1076 (mpc->dev) ? mpc->dev->name : "<unknown>"); 1077 mpc->in_ops->put(entry); 1078 return; 1079 } 1080 1081 /* 1082 * Things get complicated because we have to check if there's an egress 1083 * shortcut with suitable traffic parameters we could use. 1084 */ 1085 static void check_qos_and_open_shortcut(struct k_message *msg, struct mpoa_client *client, in_cache_entry *entry) 1086 { 1087 __be32 dst_ip = msg->content.in_info.in_dst_ip; 1088 struct atm_mpoa_qos *qos = atm_mpoa_search_qos(dst_ip); 1089 eg_cache_entry *eg_entry = client->eg_ops->get_by_src_ip(dst_ip, client); 1090 1091 if(eg_entry && eg_entry->shortcut){ 1092 if(eg_entry->shortcut->qos.txtp.traffic_class & 1093 msg->qos.txtp.traffic_class & 1094 (qos ? qos->qos.txtp.traffic_class : ATM_UBR | ATM_CBR)){ 1095 if(eg_entry->shortcut->qos.txtp.traffic_class == ATM_UBR) 1096 entry->shortcut = eg_entry->shortcut; 1097 else if(eg_entry->shortcut->qos.txtp.max_pcr > 0) 1098 entry->shortcut = eg_entry->shortcut; 1099 } 1100 if(entry->shortcut){ 1101 dprintk("mpoa: (%s) using egress SVC to reach %pI4\n", 1102 client->dev->name, &dst_ip); 1103 client->eg_ops->put(eg_entry); 1104 return; 1105 } 1106 } 1107 if (eg_entry != NULL) 1108 client->eg_ops->put(eg_entry); 1109 1110 /* No luck in the egress cache we must open an ingress SVC */ 1111 msg->type = OPEN_INGRESS_SVC; 1112 if (qos && (qos->qos.txtp.traffic_class == msg->qos.txtp.traffic_class)) 1113 { 1114 msg->qos = qos->qos; 1115 printk("mpoa: (%s) trying to get a CBR shortcut\n",client->dev->name); 1116 } 1117 else memset(&msg->qos,0,sizeof(struct atm_qos)); 1118 msg_to_mpoad(msg, client); 1119 return; 1120 } 1121 1122 static void MPOA_res_reply_rcvd(struct k_message *msg, struct mpoa_client *mpc) 1123 { 1124 __be32 dst_ip = msg->content.in_info.in_dst_ip; 1125 in_cache_entry *entry = mpc->in_ops->get(dst_ip, mpc); 1126 1127 dprintk("mpoa: (%s) MPOA_res_reply_rcvd: ip %pI4\n", 1128 mpc->dev->name, &dst_ip); 1129 ddprintk("mpoa: (%s) MPOA_res_reply_rcvd() entry = %p", mpc->dev->name, entry); 1130 if(entry == NULL){ 1131 printk("\nmpoa: (%s) ARGH, received res. reply for an entry that doesn't exist.\n", mpc->dev->name); 1132 return; 1133 } 1134 ddprintk(" entry_state = %d ", entry->entry_state); 1135 1136 if (entry->entry_state == INGRESS_RESOLVED) { 1137 printk("\nmpoa: (%s) MPOA_res_reply_rcvd for RESOLVED entry!\n", mpc->dev->name); 1138 mpc->in_ops->put(entry); 1139 return; 1140 } 1141 1142 entry->ctrl_info = msg->content.in_info; 1143 do_gettimeofday(&(entry->tv)); 1144 do_gettimeofday(&(entry->reply_wait)); /* Used in refreshing func from now on */ 1145 entry->refresh_time = 0; 1146 ddprintk("entry->shortcut = %p\n", entry->shortcut); 1147 1148 if(entry->entry_state == INGRESS_RESOLVING && entry->shortcut != NULL){ 1149 entry->entry_state = INGRESS_RESOLVED; 1150 mpc->in_ops->put(entry); 1151 return; /* Shortcut already open... */ 1152 } 1153 1154 if (entry->shortcut != NULL) { 1155 printk("mpoa: (%s) MPOA_res_reply_rcvd: entry->shortcut != NULL, impossible!\n", 1156 mpc->dev->name); 1157 mpc->in_ops->put(entry); 1158 return; 1159 } 1160 1161 check_qos_and_open_shortcut(msg, mpc, entry); 1162 entry->entry_state = INGRESS_RESOLVED; 1163 mpc->in_ops->put(entry); 1164 1165 return; 1166 1167 } 1168 1169 static void ingress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc) 1170 { 1171 __be32 dst_ip = msg->content.in_info.in_dst_ip; 1172 __be32 mask = msg->ip_mask; 1173 in_cache_entry *entry = mpc->in_ops->get_with_mask(dst_ip, mpc, mask); 1174 1175 if(entry == NULL){ 1176 printk("mpoa: (%s) ingress_purge_rcvd: purge for a non-existing entry, ip = %pI4\n", 1177 mpc->dev->name, &dst_ip); 1178 return; 1179 } 1180 1181 do { 1182 dprintk("mpoa: (%s) ingress_purge_rcvd: removing an ingress entry, ip = %pI4\n", 1183 mpc->dev->name, &dst_ip); 1184 write_lock_bh(&mpc->ingress_lock); 1185 mpc->in_ops->remove_entry(entry, mpc); 1186 write_unlock_bh(&mpc->ingress_lock); 1187 mpc->in_ops->put(entry); 1188 entry = mpc->in_ops->get_with_mask(dst_ip, mpc, mask); 1189 } while (entry != NULL); 1190 1191 return; 1192 } 1193 1194 static void egress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc) 1195 { 1196 __be32 cache_id = msg->content.eg_info.cache_id; 1197 eg_cache_entry *entry = mpc->eg_ops->get_by_cache_id(cache_id, mpc); 1198 1199 if (entry == NULL) { 1200 dprintk("mpoa: (%s) egress_purge_rcvd: purge for a non-existing entry\n", mpc->dev->name); 1201 return; 1202 } 1203 1204 write_lock_irq(&mpc->egress_lock); 1205 mpc->eg_ops->remove_entry(entry, mpc); 1206 write_unlock_irq(&mpc->egress_lock); 1207 1208 mpc->eg_ops->put(entry); 1209 1210 return; 1211 } 1212 1213 static void purge_egress_shortcut(struct atm_vcc *vcc, eg_cache_entry *entry) 1214 { 1215 struct sock *sk; 1216 struct k_message *purge_msg; 1217 struct sk_buff *skb; 1218 1219 dprintk("mpoa: purge_egress_shortcut: entering\n"); 1220 if (vcc == NULL) { 1221 printk("mpoa: purge_egress_shortcut: vcc == NULL\n"); 1222 return; 1223 } 1224 1225 skb = alloc_skb(sizeof(struct k_message), GFP_ATOMIC); 1226 if (skb == NULL) { 1227 printk("mpoa: purge_egress_shortcut: out of memory\n"); 1228 return; 1229 } 1230 1231 skb_put(skb, sizeof(struct k_message)); 1232 memset(skb->data, 0, sizeof(struct k_message)); 1233 purge_msg = (struct k_message *)skb->data; 1234 purge_msg->type = DATA_PLANE_PURGE; 1235 if (entry != NULL) 1236 purge_msg->content.eg_info = entry->ctrl_info; 1237 1238 atm_force_charge(vcc, skb->truesize); 1239 1240 sk = sk_atm(vcc); 1241 skb_queue_tail(&sk->sk_receive_queue, skb); 1242 sk->sk_data_ready(sk, skb->len); 1243 dprintk("mpoa: purge_egress_shortcut: exiting:\n"); 1244 1245 return; 1246 } 1247 1248 /* 1249 * Our MPS died. Tell our daemon to send NHRP data plane purge to each 1250 * of the egress shortcuts we have. 1251 */ 1252 static void mps_death( struct k_message * msg, struct mpoa_client * mpc ) 1253 { 1254 eg_cache_entry *entry; 1255 1256 dprintk("mpoa: (%s) mps_death:\n", mpc->dev->name); 1257 1258 if(memcmp(msg->MPS_ctrl, mpc->mps_ctrl_addr, ATM_ESA_LEN)){ 1259 printk("mpoa: (%s) mps_death: wrong MPS\n", mpc->dev->name); 1260 return; 1261 } 1262 1263 /* FIXME: This knows too much of the cache structure */ 1264 read_lock_irq(&mpc->egress_lock); 1265 entry = mpc->eg_cache; 1266 while (entry != NULL) { 1267 purge_egress_shortcut(entry->shortcut, entry); 1268 entry = entry->next; 1269 } 1270 read_unlock_irq(&mpc->egress_lock); 1271 1272 mpc->in_ops->destroy_cache(mpc); 1273 mpc->eg_ops->destroy_cache(mpc); 1274 1275 return; 1276 } 1277 1278 static void MPOA_cache_impos_rcvd( struct k_message * msg, struct mpoa_client * mpc) 1279 { 1280 uint16_t holding_time; 1281 eg_cache_entry *entry = mpc->eg_ops->get_by_cache_id(msg->content.eg_info.cache_id, mpc); 1282 1283 holding_time = msg->content.eg_info.holding_time; 1284 dprintk("mpoa: (%s) MPOA_cache_impos_rcvd: entry = %p, holding_time = %u\n", 1285 mpc->dev->name, entry, holding_time); 1286 if(entry == NULL && holding_time) { 1287 entry = mpc->eg_ops->add_entry(msg, mpc); 1288 mpc->eg_ops->put(entry); 1289 return; 1290 } 1291 if(holding_time){ 1292 mpc->eg_ops->update(entry, holding_time); 1293 return; 1294 } 1295 1296 write_lock_irq(&mpc->egress_lock); 1297 mpc->eg_ops->remove_entry(entry, mpc); 1298 write_unlock_irq(&mpc->egress_lock); 1299 1300 mpc->eg_ops->put(entry); 1301 1302 return; 1303 } 1304 1305 static void set_mpc_ctrl_addr_rcvd(struct k_message *mesg, struct mpoa_client *mpc) 1306 { 1307 struct lec_priv *priv; 1308 int i, retval ; 1309 1310 uint8_t tlv[4 + 1 + 1 + 1 + ATM_ESA_LEN]; 1311 1312 tlv[0] = 00; tlv[1] = 0xa0; tlv[2] = 0x3e; tlv[3] = 0x2a; /* type */ 1313 tlv[4] = 1 + 1 + ATM_ESA_LEN; /* length */ 1314 tlv[5] = 0x02; /* MPOA client */ 1315 tlv[6] = 0x00; /* number of MPS MAC addresses */ 1316 1317 memcpy(&tlv[7], mesg->MPS_ctrl, ATM_ESA_LEN); /* MPC ctrl ATM addr */ 1318 memcpy(mpc->our_ctrl_addr, mesg->MPS_ctrl, ATM_ESA_LEN); 1319 1320 dprintk("mpoa: (%s) setting MPC ctrl ATM address to ", 1321 (mpc->dev) ? mpc->dev->name : "<unknown>"); 1322 for (i = 7; i < sizeof(tlv); i++) 1323 dprintk("%02x ", tlv[i]); 1324 dprintk("\n"); 1325 1326 if (mpc->dev) { 1327 priv = netdev_priv(mpc->dev); 1328 retval = priv->lane2_ops->associate_req(mpc->dev, mpc->dev->dev_addr, tlv, sizeof(tlv)); 1329 if (retval == 0) 1330 printk("mpoa: (%s) MPOA device type TLV association failed\n", mpc->dev->name); 1331 retval = priv->lane2_ops->resolve(mpc->dev, NULL, 1, NULL, NULL); 1332 if (retval < 0) 1333 printk("mpoa: (%s) targetless LE_ARP request failed\n", mpc->dev->name); 1334 } 1335 1336 return; 1337 } 1338 1339 static void set_mps_mac_addr_rcvd(struct k_message *msg, struct mpoa_client *client) 1340 { 1341 1342 if(client->number_of_mps_macs) 1343 kfree(client->mps_macs); 1344 client->number_of_mps_macs = 0; 1345 client->mps_macs = kmemdup(msg->MPS_ctrl, ETH_ALEN, GFP_KERNEL); 1346 if (client->mps_macs == NULL) { 1347 printk("mpoa: set_mps_mac_addr_rcvd: out of memory\n"); 1348 return; 1349 } 1350 client->number_of_mps_macs = 1; 1351 1352 return; 1353 } 1354 1355 /* 1356 * purge egress cache and tell daemon to 'action' (DIE, RELOAD) 1357 */ 1358 static void clean_up(struct k_message *msg, struct mpoa_client *mpc, int action) 1359 { 1360 1361 eg_cache_entry *entry; 1362 msg->type = SND_EGRESS_PURGE; 1363 1364 1365 /* FIXME: This knows too much of the cache structure */ 1366 read_lock_irq(&mpc->egress_lock); 1367 entry = mpc->eg_cache; 1368 while (entry != NULL){ 1369 msg->content.eg_info = entry->ctrl_info; 1370 dprintk("mpoa: cache_id %u\n", entry->ctrl_info.cache_id); 1371 msg_to_mpoad(msg, mpc); 1372 entry = entry->next; 1373 } 1374 read_unlock_irq(&mpc->egress_lock); 1375 1376 msg->type = action; 1377 msg_to_mpoad(msg, mpc); 1378 return; 1379 } 1380 1381 static void mpc_timer_refresh(void) 1382 { 1383 mpc_timer.expires = jiffies + (MPC_P2 * HZ); 1384 mpc_timer.data = mpc_timer.expires; 1385 mpc_timer.function = mpc_cache_check; 1386 add_timer(&mpc_timer); 1387 1388 return; 1389 } 1390 1391 static void mpc_cache_check( unsigned long checking_time ) 1392 { 1393 struct mpoa_client *mpc = mpcs; 1394 static unsigned long previous_resolving_check_time; 1395 static unsigned long previous_refresh_time; 1396 1397 while( mpc != NULL ){ 1398 mpc->in_ops->clear_count(mpc); 1399 mpc->eg_ops->clear_expired(mpc); 1400 if(checking_time - previous_resolving_check_time > mpc->parameters.mpc_p4 * HZ ){ 1401 mpc->in_ops->check_resolving(mpc); 1402 previous_resolving_check_time = checking_time; 1403 } 1404 if(checking_time - previous_refresh_time > mpc->parameters.mpc_p5 * HZ ){ 1405 mpc->in_ops->refresh(mpc); 1406 previous_refresh_time = checking_time; 1407 } 1408 mpc = mpc->next; 1409 } 1410 mpc_timer_refresh(); 1411 1412 return; 1413 } 1414 1415 static int atm_mpoa_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 1416 { 1417 int err = 0; 1418 struct atm_vcc *vcc = ATM_SD(sock); 1419 1420 if (cmd != ATMMPC_CTRL && cmd != ATMMPC_DATA) 1421 return -ENOIOCTLCMD; 1422 1423 if (!capable(CAP_NET_ADMIN)) 1424 return -EPERM; 1425 1426 switch (cmd) { 1427 case ATMMPC_CTRL: 1428 err = atm_mpoa_mpoad_attach(vcc, (int)arg); 1429 if (err >= 0) 1430 sock->state = SS_CONNECTED; 1431 break; 1432 case ATMMPC_DATA: 1433 err = atm_mpoa_vcc_attach(vcc, (void __user *)arg); 1434 break; 1435 default: 1436 break; 1437 } 1438 return err; 1439 } 1440 1441 1442 static struct atm_ioctl atm_ioctl_ops = { 1443 .owner = THIS_MODULE, 1444 .ioctl = atm_mpoa_ioctl, 1445 }; 1446 1447 static __init int atm_mpoa_init(void) 1448 { 1449 register_atm_ioctl(&atm_ioctl_ops); 1450 1451 if (mpc_proc_init() != 0) 1452 printk(KERN_INFO "mpoa: failed to initialize /proc/mpoa\n"); 1453 1454 printk("mpc.c: " __DATE__ " " __TIME__ " initialized\n"); 1455 1456 return 0; 1457 } 1458 1459 static void __exit atm_mpoa_cleanup(void) 1460 { 1461 struct mpoa_client *mpc, *tmp; 1462 struct atm_mpoa_qos *qos, *nextqos; 1463 struct lec_priv *priv; 1464 1465 mpc_proc_clean(); 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 = netdev_priv(mpc->dev); 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