mpc.c revision ec634fe328182a1a098585bfc7b69e5042bdb08d
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 */ 55static void MPOA_trigger_rcvd (struct k_message *msg, struct mpoa_client *mpc); 56static void MPOA_res_reply_rcvd(struct k_message *msg, struct mpoa_client *mpc); 57static void ingress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc); 58static void egress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc); 59static void mps_death(struct k_message *msg, struct mpoa_client *mpc); 60static void clean_up(struct k_message *msg, struct mpoa_client *mpc, int action); 61static void MPOA_cache_impos_rcvd(struct k_message *msg, struct mpoa_client *mpc); 62static void set_mpc_ctrl_addr_rcvd(struct k_message *mesg, struct mpoa_client *mpc); 63static void set_mps_mac_addr_rcvd(struct k_message *mesg, struct mpoa_client *mpc); 64 65static 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); 69static void purge_egress_shortcut(struct atm_vcc *vcc, eg_cache_entry *entry); 70 71static void send_set_mps_ctrl_addr(const char *addr, struct mpoa_client *mpc); 72static void mpoad_close(struct atm_vcc *vcc); 73static int msg_from_mpoad(struct atm_vcc *vcc, struct sk_buff *skb); 74 75static void mpc_push(struct atm_vcc *vcc, struct sk_buff *skb); 76static int mpc_send_packet(struct sk_buff *skb, struct net_device *dev); 77static int mpoa_event_listener(struct notifier_block *mpoa_notifier, unsigned long event, void *dev); 78static void mpc_timer_refresh(void); 79static void mpc_cache_check( unsigned long checking_time ); 80 81static struct llc_snap_hdr llc_snap_mpoa_ctrl = { 82 0xaa, 0xaa, 0x03, 83 {0x00, 0x00, 0x5e}, 84 {0x00, 0x03} /* For MPOA control PDUs */ 85}; 86static 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}; 91static 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 97static struct notifier_block mpoa_notifier = { 98 mpoa_event_listener, 99 NULL, 100 0 101}; 102 103struct mpoa_client *mpcs = NULL; /* FIXME */ 104static struct atm_mpoa_qos *qos_head = NULL; 105static DEFINE_TIMER(mpc_timer, NULL, 0, 0); 106 107 108static 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 122static 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 136static 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 */ 157struct 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 182struct 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 */ 200int 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 */ 226void 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 243static 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 254static 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 */ 285static 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->netdev_ops) 290 printk("mpoa: (%s) start_mpc not starting\n", dev->name); 291 else { 292 mpc->old_ops = dev->netdev_ops; 293 mpc->new_ops = *mpc->old_ops; 294 mpc->new_ops.ndo_start_xmit = mpc_send_packet; 295 dev->netdev_ops = &mpc->new_ops; 296 } 297} 298 299static void stop_mpc(struct mpoa_client *mpc) 300{ 301 struct net_device *dev = mpc->dev; 302 dprintk("mpoa: (%s) stop_mpc:", mpc->dev->name); 303 304 /* Lets not nullify lec device's dev->hard_start_xmit */ 305 if (dev->netdev_ops != &mpc->new_ops) { 306 dprintk(" mpc already stopped, not fatal\n"); 307 return; 308 } 309 dprintk("\n"); 310 311 dev->netdev_ops = mpc->old_ops; 312 mpc->old_ops = NULL; 313 314 /* close_shortcuts(mpc); ??? FIXME */ 315} 316 317static const char *mpoa_device_type_string(char type) __attribute__ ((unused)); 318 319static const char *mpoa_device_type_string(char type) 320{ 321 switch(type) { 322 case NON_MPOA: 323 return "non-MPOA device"; 324 break; 325 case MPS: 326 return "MPS"; 327 break; 328 case MPC: 329 return "MPC"; 330 break; 331 case MPS_AND_MPC: 332 return "both MPS and MPC"; 333 break; 334 default: 335 return "unspecified (non-MPOA) device"; 336 break; 337 } 338 339 return ""; /* not reached */ 340} 341 342/* 343 * lec device calls this via its netdev_priv(dev)->lane2_ops 344 * ->associate_indicator() when it sees a TLV in LE_ARP packet. 345 * We fill in the pointer above when we see a LANE2 lec initializing 346 * See LANE2 spec 3.1.5 347 * 348 * Quite a big and ugly function but when you look at it 349 * all it does is to try to locate and parse MPOA Device 350 * Type TLV. 351 * We give our lec a pointer to this function and when the 352 * lec sees a TLV it uses the pointer to call this function. 353 * 354 */ 355static void lane2_assoc_ind(struct net_device *dev, const u8 *mac_addr, 356 const u8 *tlvs, u32 sizeoftlvs) 357{ 358 uint32_t type; 359 uint8_t length, mpoa_device_type, number_of_mps_macs; 360 const uint8_t *end_of_tlvs; 361 struct mpoa_client *mpc; 362 363 mpoa_device_type = number_of_mps_macs = 0; /* silence gcc */ 364 dprintk("mpoa: (%s) lane2_assoc_ind: received TLV(s), ", dev->name); 365 dprintk("total length of all TLVs %d\n", sizeoftlvs); 366 mpc = find_mpc_by_lec(dev); /* Sampo-Fix: moved here from below */ 367 if (mpc == NULL) { 368 printk("mpoa: (%s) lane2_assoc_ind: no mpc\n", dev->name); 369 return; 370 } 371 end_of_tlvs = tlvs + sizeoftlvs; 372 while (end_of_tlvs - tlvs >= 5) { 373 type = (tlvs[0] << 24) | (tlvs[1] << 16) | (tlvs[2] << 8) | tlvs[3]; 374 length = tlvs[4]; 375 tlvs += 5; 376 dprintk(" type 0x%x length %02x\n", type, length); 377 if (tlvs + length > end_of_tlvs) { 378 printk("TLV value extends past its buffer, aborting parse\n"); 379 return; 380 } 381 382 if (type == 0) { 383 printk("mpoa: (%s) lane2_assoc_ind: TLV type was 0, returning\n", dev->name); 384 return; 385 } 386 387 if (type != TLV_MPOA_DEVICE_TYPE) { 388 tlvs += length; 389 continue; /* skip other TLVs */ 390 } 391 mpoa_device_type = *tlvs++; 392 number_of_mps_macs = *tlvs++; 393 dprintk("mpoa: (%s) MPOA device type '%s', ", dev->name, mpoa_device_type_string(mpoa_device_type)); 394 if (mpoa_device_type == MPS_AND_MPC && 395 length < (42 + number_of_mps_macs*ETH_ALEN)) { /* :) */ 396 printk("\nmpoa: (%s) lane2_assoc_ind: short MPOA Device Type TLV\n", 397 dev->name); 398 continue; 399 } 400 if ((mpoa_device_type == MPS || mpoa_device_type == MPC) 401 && length < 22 + 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 != MPS_AND_MPC) { 407 dprintk("ignoring non-MPS device\n"); 408 if (mpoa_device_type == MPC) tlvs += 20; 409 continue; /* we are only interested in MPSs */ 410 } 411 if (number_of_mps_macs == 0 && mpoa_device_type == MPS_AND_MPC) { 412 printk("\nmpoa: (%s) lane2_assoc_ind: MPS_AND_MPC has zero MACs\n", dev->name); 413 continue; /* someone should read the spec */ 414 } 415 dprintk("this MPS has %d MAC addresses\n", number_of_mps_macs); 416 417 /* ok, now we can go and tell our daemon the control address of MPS */ 418 send_set_mps_ctrl_addr(tlvs, mpc); 419 420 tlvs = copy_macs(mpc, mac_addr, tlvs, number_of_mps_macs, mpoa_device_type); 421 if (tlvs == NULL) return; 422 } 423 if (end_of_tlvs - tlvs != 0) 424 printk("mpoa: (%s) lane2_assoc_ind: ignoring %Zd bytes of trailing TLV carbage\n", 425 dev->name, end_of_tlvs - tlvs); 426 return; 427} 428 429/* 430 * Store at least advertizing router's MAC address 431 * plus the possible MAC address(es) to mpc->mps_macs. 432 * For a freshly allocated MPOA client mpc->mps_macs == 0. 433 */ 434static const uint8_t *copy_macs(struct mpoa_client *mpc, 435 const uint8_t *router_mac, 436 const uint8_t *tlvs, uint8_t mps_macs, 437 uint8_t device_type) 438{ 439 int num_macs; 440 num_macs = (mps_macs > 1) ? mps_macs : 1; 441 442 if (mpc->number_of_mps_macs != num_macs) { /* need to reallocate? */ 443 if (mpc->number_of_mps_macs != 0) kfree(mpc->mps_macs); 444 mpc->number_of_mps_macs = 0; 445 mpc->mps_macs = kmalloc(num_macs*ETH_ALEN, GFP_KERNEL); 446 if (mpc->mps_macs == NULL) { 447 printk("mpoa: (%s) copy_macs: out of mem\n", mpc->dev->name); 448 return NULL; 449 } 450 } 451 memcpy(mpc->mps_macs, router_mac, ETH_ALEN); 452 tlvs += 20; if (device_type == MPS_AND_MPC) tlvs += 20; 453 if (mps_macs > 0) 454 memcpy(mpc->mps_macs, tlvs, mps_macs*ETH_ALEN); 455 tlvs += mps_macs*ETH_ALEN; 456 mpc->number_of_mps_macs = num_macs; 457 458 return tlvs; 459} 460 461static int send_via_shortcut(struct sk_buff *skb, struct mpoa_client *mpc) 462{ 463 in_cache_entry *entry; 464 struct iphdr *iph; 465 char *buff; 466 __be32 ipaddr = 0; 467 468 static struct { 469 struct llc_snap_hdr hdr; 470 __be32 tag; 471 } tagged_llc_snap_hdr = { 472 {0xaa, 0xaa, 0x03, {0x00, 0x00, 0x00}, {0x88, 0x4c}}, 473 0 474 }; 475 476 buff = skb->data + mpc->dev->hard_header_len; 477 iph = (struct iphdr *)buff; 478 ipaddr = iph->daddr; 479 480 ddprintk("mpoa: (%s) send_via_shortcut: ipaddr 0x%x\n", mpc->dev->name, ipaddr); 481 482 entry = mpc->in_ops->get(ipaddr, mpc); 483 if (entry == NULL) { 484 entry = mpc->in_ops->add_entry(ipaddr, mpc); 485 if (entry != NULL) mpc->in_ops->put(entry); 486 return 1; 487 } 488 if (mpc->in_ops->cache_hit(entry, mpc) != OPEN){ /* threshold not exceeded or VCC not ready */ 489 ddprintk("mpoa: (%s) send_via_shortcut: cache_hit: returns != OPEN\n", mpc->dev->name); 490 mpc->in_ops->put(entry); 491 return 1; 492 } 493 494 ddprintk("mpoa: (%s) send_via_shortcut: using shortcut\n", mpc->dev->name); 495 /* MPOA spec A.1.4, MPOA client must decrement IP ttl at least by one */ 496 if (iph->ttl <= 1) { 497 ddprintk("mpoa: (%s) send_via_shortcut: IP ttl = %u, using LANE\n", mpc->dev->name, iph->ttl); 498 mpc->in_ops->put(entry); 499 return 1; 500 } 501 iph->ttl--; 502 iph->check = 0; 503 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl); 504 505 if (entry->ctrl_info.tag != 0) { 506 ddprintk("mpoa: (%s) send_via_shortcut: adding tag 0x%x\n", mpc->dev->name, entry->ctrl_info.tag); 507 tagged_llc_snap_hdr.tag = entry->ctrl_info.tag; 508 skb_pull(skb, ETH_HLEN); /* get rid of Eth header */ 509 skb_push(skb, sizeof(tagged_llc_snap_hdr)); /* add LLC/SNAP header */ 510 skb_copy_to_linear_data(skb, &tagged_llc_snap_hdr, 511 sizeof(tagged_llc_snap_hdr)); 512 } else { 513 skb_pull(skb, ETH_HLEN); /* get rid of Eth header */ 514 skb_push(skb, sizeof(struct llc_snap_hdr)); /* add LLC/SNAP header + tag */ 515 skb_copy_to_linear_data(skb, &llc_snap_mpoa_data, 516 sizeof(struct llc_snap_hdr)); 517 } 518 519 atomic_add(skb->truesize, &sk_atm(entry->shortcut)->sk_wmem_alloc); 520 ATM_SKB(skb)->atm_options = entry->shortcut->atm_options; 521 entry->shortcut->send(entry->shortcut, skb); 522 entry->packets_fwded++; 523 mpc->in_ops->put(entry); 524 525 return 0; 526} 527 528/* 529 * Probably needs some error checks and locking, not sure... 530 */ 531static int mpc_send_packet(struct sk_buff *skb, struct net_device *dev) 532{ 533 struct mpoa_client *mpc; 534 struct ethhdr *eth; 535 int i = 0; 536 537 mpc = find_mpc_by_lec(dev); /* this should NEVER fail */ 538 if(mpc == NULL) { 539 printk("mpoa: (%s) mpc_send_packet: no MPC found\n", dev->name); 540 goto non_ip; 541 } 542 543 eth = (struct ethhdr *)skb->data; 544 if (eth->h_proto != htons(ETH_P_IP)) 545 goto non_ip; /* Multi-Protocol Over ATM :-) */ 546 547 /* Weed out funny packets (e.g., AF_PACKET or raw). */ 548 if (skb->len < ETH_HLEN + sizeof(struct iphdr)) 549 goto non_ip; 550 skb_set_network_header(skb, ETH_HLEN); 551 if (skb->len < ETH_HLEN + ip_hdr(skb)->ihl * 4 || ip_hdr(skb)->ihl < 5) 552 goto non_ip; 553 554 while (i < mpc->number_of_mps_macs) { 555 if (!compare_ether_addr(eth->h_dest, (mpc->mps_macs + i*ETH_ALEN))) 556 if ( send_via_shortcut(skb, mpc) == 0 ) /* try shortcut */ 557 return NETDEV_TX_OK; /* success! */ 558 i++; 559 } 560 561 non_ip: 562 return mpc->old_ops->ndo_start_xmit(skb,dev); 563} 564 565static int atm_mpoa_vcc_attach(struct atm_vcc *vcc, void __user *arg) 566{ 567 int bytes_left; 568 struct mpoa_client *mpc; 569 struct atmmpc_ioc ioc_data; 570 in_cache_entry *in_entry; 571 __be32 ipaddr; 572 573 bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmmpc_ioc)); 574 if (bytes_left != 0) { 575 printk("mpoa: mpc_vcc_attach: Short read (missed %d bytes) from userland\n", bytes_left); 576 return -EFAULT; 577 } 578 ipaddr = ioc_data.ipaddr; 579 if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF) 580 return -EINVAL; 581 582 mpc = find_mpc_by_itfnum(ioc_data.dev_num); 583 if (mpc == NULL) 584 return -EINVAL; 585 586 if (ioc_data.type == MPC_SOCKET_INGRESS) { 587 in_entry = mpc->in_ops->get(ipaddr, mpc); 588 if (in_entry == NULL || in_entry->entry_state < INGRESS_RESOLVED) { 589 printk("mpoa: (%s) mpc_vcc_attach: did not find RESOLVED entry from ingress cache\n", 590 mpc->dev->name); 591 if (in_entry != NULL) mpc->in_ops->put(in_entry); 592 return -EINVAL; 593 } 594 printk("mpoa: (%s) mpc_vcc_attach: attaching ingress SVC, entry = %pI4\n", 595 mpc->dev->name, &in_entry->ctrl_info.in_dst_ip); 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 */ 611static 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 dprintk("mpoa: (%s) mpc_vcc_close: ingress SVC closed ip = %pI4\n", 627 mpc->dev->name, &in_entry->ctrl_info.in_dst_ip); 628 in_entry->shortcut = NULL; 629 mpc->in_ops->put(in_entry); 630 } 631 eg_entry = mpc->eg_ops->get_by_vcc(vcc, mpc); 632 if (eg_entry) { 633 dprintk("mpoa: (%s) mpc_vcc_close: egress SVC closed\n", mpc->dev->name); 634 eg_entry->shortcut = NULL; 635 mpc->eg_ops->put(eg_entry); 636 } 637 638 if (in_entry == NULL && eg_entry == NULL) 639 dprintk("mpoa: (%s) mpc_vcc_close: unused vcc closed\n", dev->name); 640 641 return; 642} 643 644static void mpc_push(struct atm_vcc *vcc, struct sk_buff *skb) 645{ 646 struct net_device *dev = (struct net_device *)vcc->proto_data; 647 struct sk_buff *new_skb; 648 eg_cache_entry *eg; 649 struct mpoa_client *mpc; 650 __be32 tag; 651 char *tmp; 652 653 ddprintk("mpoa: (%s) mpc_push:\n", dev->name); 654 if (skb == NULL) { 655 dprintk("mpoa: (%s) mpc_push: null skb, closing VCC\n", dev->name); 656 mpc_vcc_close(vcc, dev); 657 return; 658 } 659 660 skb->dev = dev; 661 if (memcmp(skb->data, &llc_snap_mpoa_ctrl, sizeof(struct llc_snap_hdr)) == 0) { 662 struct sock *sk = sk_atm(vcc); 663 664 dprintk("mpoa: (%s) mpc_push: control packet arrived\n", dev->name); 665 /* Pass control packets to daemon */ 666 skb_queue_tail(&sk->sk_receive_queue, skb); 667 sk->sk_data_ready(sk, skb->len); 668 return; 669 } 670 671 /* data coming over the shortcut */ 672 atm_return(vcc, skb->truesize); 673 674 mpc = find_mpc_by_lec(dev); 675 if (mpc == NULL) { 676 printk("mpoa: (%s) mpc_push: unknown MPC\n", dev->name); 677 return; 678 } 679 680 if (memcmp(skb->data, &llc_snap_mpoa_data_tagged, sizeof(struct llc_snap_hdr)) == 0) { /* MPOA tagged data */ 681 ddprintk("mpoa: (%s) mpc_push: tagged data packet arrived\n", dev->name); 682 683 } else if (memcmp(skb->data, &llc_snap_mpoa_data, sizeof(struct llc_snap_hdr)) == 0) { /* MPOA data */ 684 printk("mpoa: (%s) mpc_push: non-tagged data packet arrived\n", dev->name); 685 printk(" mpc_push: non-tagged data unsupported, purging\n"); 686 dev_kfree_skb_any(skb); 687 return; 688 } else { 689 printk("mpoa: (%s) mpc_push: garbage arrived, purging\n", dev->name); 690 dev_kfree_skb_any(skb); 691 return; 692 } 693 694 tmp = skb->data + sizeof(struct llc_snap_hdr); 695 tag = *(__be32 *)tmp; 696 697 eg = mpc->eg_ops->get_by_tag(tag, mpc); 698 if (eg == NULL) { 699 printk("mpoa: (%s) mpc_push: Didn't find egress cache entry, tag = %u\n", 700 dev->name,tag); 701 purge_egress_shortcut(vcc, NULL); 702 dev_kfree_skb_any(skb); 703 return; 704 } 705 706 /* 707 * See if ingress MPC is using shortcut we opened as a return channel. 708 * This means we have a bi-directional vcc opened by us. 709 */ 710 if (eg->shortcut == NULL) { 711 eg->shortcut = vcc; 712 printk("mpoa: (%s) mpc_push: egress SVC in use\n", dev->name); 713 } 714 715 skb_pull(skb, sizeof(struct llc_snap_hdr) + sizeof(tag)); /* get rid of LLC/SNAP header */ 716 new_skb = skb_realloc_headroom(skb, eg->ctrl_info.DH_length); /* LLC/SNAP is shorter than MAC header :( */ 717 dev_kfree_skb_any(skb); 718 if (new_skb == NULL){ 719 mpc->eg_ops->put(eg); 720 return; 721 } 722 skb_push(new_skb, eg->ctrl_info.DH_length); /* add MAC header */ 723 skb_copy_to_linear_data(new_skb, eg->ctrl_info.DLL_header, 724 eg->ctrl_info.DH_length); 725 new_skb->protocol = eth_type_trans(new_skb, dev); 726 skb_reset_network_header(new_skb); 727 728 eg->latest_ip_addr = ip_hdr(new_skb)->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 738static struct atmdev_ops mpc_ops = { /* only send is required */ 739 .close = mpoad_close, 740 .send = msg_from_mpoad 741}; 742 743static struct atm_dev mpc_dev = { 744 .ops = &mpc_ops, 745 .type = "mpc", 746 .number = 42, 747 .lock = __SPIN_LOCK_UNLOCKED(mpc_dev.lock) 748 /* members not explicitly initialised will be 0 */ 749}; 750 751static 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 = netdev_priv(mpc->dev); 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 814static void send_set_mps_ctrl_addr(const 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 827static 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 = netdev_priv(mpc->dev); 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 */ 868static 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 */ 935int 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 skb_copy_to_linear_data(skb, mesg, sizeof(*mesg)); 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 959static 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; 966 967 if (!net_eq(dev_net(dev), &init_net)) 968 return NOTIFY_DONE; 969 970 if (dev->name == NULL || strncmp(dev->name, "lec", 3)) 971 return NOTIFY_DONE; /* we are only interested in lec:s */ 972 973 switch (event) { 974 case NETDEV_REGISTER: /* a new lec device was allocated */ 975 priv = netdev_priv(dev); 976 if (priv->lane_version < 2) 977 break; 978 priv->lane2_ops->associate_indicator = lane2_assoc_ind; 979 mpc = find_mpc_by_itfnum(priv->itfnum); 980 if (mpc == NULL) { 981 dprintk("mpoa: mpoa_event_listener: allocating new mpc for %s\n", 982 dev->name); 983 mpc = alloc_mpc(); 984 if (mpc == NULL) { 985 printk("mpoa: mpoa_event_listener: no new mpc"); 986 break; 987 } 988 } 989 mpc->dev_num = priv->itfnum; 990 mpc->dev = dev; 991 dev_hold(dev); 992 dprintk("mpoa: (%s) was initialized\n", dev->name); 993 break; 994 case NETDEV_UNREGISTER: 995 /* the lec device was deallocated */ 996 mpc = find_mpc_by_lec(dev); 997 if (mpc == NULL) 998 break; 999 dprintk("mpoa: device (%s) was deallocated\n", dev->name); 1000 stop_mpc(mpc); 1001 dev_put(mpc->dev); 1002 mpc->dev = NULL; 1003 break; 1004 case NETDEV_UP: 1005 /* the dev was ifconfig'ed up */ 1006 mpc = find_mpc_by_lec(dev); 1007 if (mpc == NULL) 1008 break; 1009 if (mpc->mpoad_vcc != NULL) { 1010 start_mpc(mpc, dev); 1011 } 1012 break; 1013 case NETDEV_DOWN: 1014 /* the dev was ifconfig'ed down */ 1015 /* this means that the flow of packets from the 1016 * upper layer stops 1017 */ 1018 mpc = find_mpc_by_lec(dev); 1019 if (mpc == NULL) 1020 break; 1021 if (mpc->mpoad_vcc != NULL) { 1022 stop_mpc(mpc); 1023 } 1024 break; 1025 case NETDEV_REBOOT: 1026 case NETDEV_CHANGE: 1027 case NETDEV_CHANGEMTU: 1028 case NETDEV_CHANGEADDR: 1029 case NETDEV_GOING_DOWN: 1030 break; 1031 default: 1032 break; 1033 } 1034 1035 return NOTIFY_DONE; 1036} 1037 1038/* 1039 * Functions which are called after a message is received from mpcd. 1040 * Msg is reused on purpose. 1041 */ 1042 1043 1044static void MPOA_trigger_rcvd(struct k_message *msg, struct mpoa_client *mpc) 1045{ 1046 __be32 dst_ip = msg->content.in_info.in_dst_ip; 1047 in_cache_entry *entry; 1048 1049 entry = mpc->in_ops->get(dst_ip, mpc); 1050 if(entry == NULL){ 1051 entry = mpc->in_ops->add_entry(dst_ip, mpc); 1052 entry->entry_state = INGRESS_RESOLVING; 1053 msg->type = SND_MPOA_RES_RQST; 1054 msg->content.in_info = entry->ctrl_info; 1055 msg_to_mpoad(msg, mpc); 1056 do_gettimeofday(&(entry->reply_wait)); 1057 mpc->in_ops->put(entry); 1058 return; 1059 } 1060 1061 if(entry->entry_state == INGRESS_INVALID){ 1062 entry->entry_state = INGRESS_RESOLVING; 1063 msg->type = SND_MPOA_RES_RQST; 1064 msg->content.in_info = entry->ctrl_info; 1065 msg_to_mpoad(msg, mpc); 1066 do_gettimeofday(&(entry->reply_wait)); 1067 mpc->in_ops->put(entry); 1068 return; 1069 } 1070 1071 printk("mpoa: (%s) MPOA_trigger_rcvd: entry already in resolving state\n", 1072 (mpc->dev) ? mpc->dev->name : "<unknown>"); 1073 mpc->in_ops->put(entry); 1074 return; 1075} 1076 1077/* 1078 * Things get complicated because we have to check if there's an egress 1079 * shortcut with suitable traffic parameters we could use. 1080 */ 1081static void check_qos_and_open_shortcut(struct k_message *msg, struct mpoa_client *client, in_cache_entry *entry) 1082{ 1083 __be32 dst_ip = msg->content.in_info.in_dst_ip; 1084 struct atm_mpoa_qos *qos = atm_mpoa_search_qos(dst_ip); 1085 eg_cache_entry *eg_entry = client->eg_ops->get_by_src_ip(dst_ip, client); 1086 1087 if(eg_entry && eg_entry->shortcut){ 1088 if(eg_entry->shortcut->qos.txtp.traffic_class & 1089 msg->qos.txtp.traffic_class & 1090 (qos ? qos->qos.txtp.traffic_class : ATM_UBR | ATM_CBR)){ 1091 if(eg_entry->shortcut->qos.txtp.traffic_class == ATM_UBR) 1092 entry->shortcut = eg_entry->shortcut; 1093 else if(eg_entry->shortcut->qos.txtp.max_pcr > 0) 1094 entry->shortcut = eg_entry->shortcut; 1095 } 1096 if(entry->shortcut){ 1097 dprintk("mpoa: (%s) using egress SVC to reach %pI4\n", 1098 client->dev->name, &dst_ip); 1099 client->eg_ops->put(eg_entry); 1100 return; 1101 } 1102 } 1103 if (eg_entry != NULL) 1104 client->eg_ops->put(eg_entry); 1105 1106 /* No luck in the egress cache we must open an ingress SVC */ 1107 msg->type = OPEN_INGRESS_SVC; 1108 if (qos && (qos->qos.txtp.traffic_class == msg->qos.txtp.traffic_class)) 1109 { 1110 msg->qos = qos->qos; 1111 printk("mpoa: (%s) trying to get a CBR shortcut\n",client->dev->name); 1112 } 1113 else memset(&msg->qos,0,sizeof(struct atm_qos)); 1114 msg_to_mpoad(msg, client); 1115 return; 1116} 1117 1118static void MPOA_res_reply_rcvd(struct k_message *msg, struct mpoa_client *mpc) 1119{ 1120 __be32 dst_ip = msg->content.in_info.in_dst_ip; 1121 in_cache_entry *entry = mpc->in_ops->get(dst_ip, mpc); 1122 1123 dprintk("mpoa: (%s) MPOA_res_reply_rcvd: ip %pI4\n", 1124 mpc->dev->name, &dst_ip); 1125 ddprintk("mpoa: (%s) MPOA_res_reply_rcvd() entry = %p", mpc->dev->name, entry); 1126 if(entry == NULL){ 1127 printk("\nmpoa: (%s) ARGH, received res. reply for an entry that doesn't exist.\n", mpc->dev->name); 1128 return; 1129 } 1130 ddprintk(" entry_state = %d ", entry->entry_state); 1131 1132 if (entry->entry_state == INGRESS_RESOLVED) { 1133 printk("\nmpoa: (%s) MPOA_res_reply_rcvd for RESOLVED entry!\n", mpc->dev->name); 1134 mpc->in_ops->put(entry); 1135 return; 1136 } 1137 1138 entry->ctrl_info = msg->content.in_info; 1139 do_gettimeofday(&(entry->tv)); 1140 do_gettimeofday(&(entry->reply_wait)); /* Used in refreshing func from now on */ 1141 entry->refresh_time = 0; 1142 ddprintk("entry->shortcut = %p\n", entry->shortcut); 1143 1144 if(entry->entry_state == INGRESS_RESOLVING && entry->shortcut != NULL){ 1145 entry->entry_state = INGRESS_RESOLVED; 1146 mpc->in_ops->put(entry); 1147 return; /* Shortcut already open... */ 1148 } 1149 1150 if (entry->shortcut != NULL) { 1151 printk("mpoa: (%s) MPOA_res_reply_rcvd: entry->shortcut != NULL, impossible!\n", 1152 mpc->dev->name); 1153 mpc->in_ops->put(entry); 1154 return; 1155 } 1156 1157 check_qos_and_open_shortcut(msg, mpc, entry); 1158 entry->entry_state = INGRESS_RESOLVED; 1159 mpc->in_ops->put(entry); 1160 1161 return; 1162 1163} 1164 1165static void ingress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc) 1166{ 1167 __be32 dst_ip = msg->content.in_info.in_dst_ip; 1168 __be32 mask = msg->ip_mask; 1169 in_cache_entry *entry = mpc->in_ops->get_with_mask(dst_ip, mpc, mask); 1170 1171 if(entry == NULL){ 1172 printk("mpoa: (%s) ingress_purge_rcvd: purge for a non-existing entry, ip = %pI4\n", 1173 mpc->dev->name, &dst_ip); 1174 return; 1175 } 1176 1177 do { 1178 dprintk("mpoa: (%s) ingress_purge_rcvd: removing an ingress entry, ip = %pI4\n", 1179 mpc->dev->name, &dst_ip); 1180 write_lock_bh(&mpc->ingress_lock); 1181 mpc->in_ops->remove_entry(entry, mpc); 1182 write_unlock_bh(&mpc->ingress_lock); 1183 mpc->in_ops->put(entry); 1184 entry = mpc->in_ops->get_with_mask(dst_ip, mpc, mask); 1185 } while (entry != NULL); 1186 1187 return; 1188} 1189 1190static void egress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc) 1191{ 1192 __be32 cache_id = msg->content.eg_info.cache_id; 1193 eg_cache_entry *entry = mpc->eg_ops->get_by_cache_id(cache_id, mpc); 1194 1195 if (entry == NULL) { 1196 dprintk("mpoa: (%s) egress_purge_rcvd: purge for a non-existing entry\n", mpc->dev->name); 1197 return; 1198 } 1199 1200 write_lock_irq(&mpc->egress_lock); 1201 mpc->eg_ops->remove_entry(entry, mpc); 1202 write_unlock_irq(&mpc->egress_lock); 1203 1204 mpc->eg_ops->put(entry); 1205 1206 return; 1207} 1208 1209static void purge_egress_shortcut(struct atm_vcc *vcc, eg_cache_entry *entry) 1210{ 1211 struct sock *sk; 1212 struct k_message *purge_msg; 1213 struct sk_buff *skb; 1214 1215 dprintk("mpoa: purge_egress_shortcut: entering\n"); 1216 if (vcc == NULL) { 1217 printk("mpoa: purge_egress_shortcut: vcc == NULL\n"); 1218 return; 1219 } 1220 1221 skb = alloc_skb(sizeof(struct k_message), GFP_ATOMIC); 1222 if (skb == NULL) { 1223 printk("mpoa: purge_egress_shortcut: out of memory\n"); 1224 return; 1225 } 1226 1227 skb_put(skb, sizeof(struct k_message)); 1228 memset(skb->data, 0, sizeof(struct k_message)); 1229 purge_msg = (struct k_message *)skb->data; 1230 purge_msg->type = DATA_PLANE_PURGE; 1231 if (entry != NULL) 1232 purge_msg->content.eg_info = entry->ctrl_info; 1233 1234 atm_force_charge(vcc, skb->truesize); 1235 1236 sk = sk_atm(vcc); 1237 skb_queue_tail(&sk->sk_receive_queue, skb); 1238 sk->sk_data_ready(sk, skb->len); 1239 dprintk("mpoa: purge_egress_shortcut: exiting:\n"); 1240 1241 return; 1242} 1243 1244/* 1245 * Our MPS died. Tell our daemon to send NHRP data plane purge to each 1246 * of the egress shortcuts we have. 1247 */ 1248static void mps_death( struct k_message * msg, struct mpoa_client * mpc ) 1249{ 1250 eg_cache_entry *entry; 1251 1252 dprintk("mpoa: (%s) mps_death:\n", mpc->dev->name); 1253 1254 if(memcmp(msg->MPS_ctrl, mpc->mps_ctrl_addr, ATM_ESA_LEN)){ 1255 printk("mpoa: (%s) mps_death: wrong MPS\n", mpc->dev->name); 1256 return; 1257 } 1258 1259 /* FIXME: This knows too much of the cache structure */ 1260 read_lock_irq(&mpc->egress_lock); 1261 entry = mpc->eg_cache; 1262 while (entry != NULL) { 1263 purge_egress_shortcut(entry->shortcut, entry); 1264 entry = entry->next; 1265 } 1266 read_unlock_irq(&mpc->egress_lock); 1267 1268 mpc->in_ops->destroy_cache(mpc); 1269 mpc->eg_ops->destroy_cache(mpc); 1270 1271 return; 1272} 1273 1274static void MPOA_cache_impos_rcvd( struct k_message * msg, struct mpoa_client * mpc) 1275{ 1276 uint16_t holding_time; 1277 eg_cache_entry *entry = mpc->eg_ops->get_by_cache_id(msg->content.eg_info.cache_id, mpc); 1278 1279 holding_time = msg->content.eg_info.holding_time; 1280 dprintk("mpoa: (%s) MPOA_cache_impos_rcvd: entry = %p, holding_time = %u\n", 1281 mpc->dev->name, entry, holding_time); 1282 if(entry == NULL && holding_time) { 1283 entry = mpc->eg_ops->add_entry(msg, mpc); 1284 mpc->eg_ops->put(entry); 1285 return; 1286 } 1287 if(holding_time){ 1288 mpc->eg_ops->update(entry, holding_time); 1289 return; 1290 } 1291 1292 write_lock_irq(&mpc->egress_lock); 1293 mpc->eg_ops->remove_entry(entry, mpc); 1294 write_unlock_irq(&mpc->egress_lock); 1295 1296 mpc->eg_ops->put(entry); 1297 1298 return; 1299} 1300 1301static void set_mpc_ctrl_addr_rcvd(struct k_message *mesg, struct mpoa_client *mpc) 1302{ 1303 struct lec_priv *priv; 1304 int i, retval ; 1305 1306 uint8_t tlv[4 + 1 + 1 + 1 + ATM_ESA_LEN]; 1307 1308 tlv[0] = 00; tlv[1] = 0xa0; tlv[2] = 0x3e; tlv[3] = 0x2a; /* type */ 1309 tlv[4] = 1 + 1 + ATM_ESA_LEN; /* length */ 1310 tlv[5] = 0x02; /* MPOA client */ 1311 tlv[6] = 0x00; /* number of MPS MAC addresses */ 1312 1313 memcpy(&tlv[7], mesg->MPS_ctrl, ATM_ESA_LEN); /* MPC ctrl ATM addr */ 1314 memcpy(mpc->our_ctrl_addr, mesg->MPS_ctrl, ATM_ESA_LEN); 1315 1316 dprintk("mpoa: (%s) setting MPC ctrl ATM address to ", 1317 (mpc->dev) ? mpc->dev->name : "<unknown>"); 1318 for (i = 7; i < sizeof(tlv); i++) 1319 dprintk("%02x ", tlv[i]); 1320 dprintk("\n"); 1321 1322 if (mpc->dev) { 1323 priv = netdev_priv(mpc->dev); 1324 retval = priv->lane2_ops->associate_req(mpc->dev, mpc->dev->dev_addr, tlv, sizeof(tlv)); 1325 if (retval == 0) 1326 printk("mpoa: (%s) MPOA device type TLV association failed\n", mpc->dev->name); 1327 retval = priv->lane2_ops->resolve(mpc->dev, NULL, 1, NULL, NULL); 1328 if (retval < 0) 1329 printk("mpoa: (%s) targetless LE_ARP request failed\n", mpc->dev->name); 1330 } 1331 1332 return; 1333} 1334 1335static void set_mps_mac_addr_rcvd(struct k_message *msg, struct mpoa_client *client) 1336{ 1337 1338 if(client->number_of_mps_macs) 1339 kfree(client->mps_macs); 1340 client->number_of_mps_macs = 0; 1341 client->mps_macs = kmemdup(msg->MPS_ctrl, ETH_ALEN, GFP_KERNEL); 1342 if (client->mps_macs == NULL) { 1343 printk("mpoa: set_mps_mac_addr_rcvd: out of memory\n"); 1344 return; 1345 } 1346 client->number_of_mps_macs = 1; 1347 1348 return; 1349} 1350 1351/* 1352 * purge egress cache and tell daemon to 'action' (DIE, RELOAD) 1353 */ 1354static void clean_up(struct k_message *msg, struct mpoa_client *mpc, int action) 1355{ 1356 1357 eg_cache_entry *entry; 1358 msg->type = SND_EGRESS_PURGE; 1359 1360 1361 /* FIXME: This knows too much of the cache structure */ 1362 read_lock_irq(&mpc->egress_lock); 1363 entry = mpc->eg_cache; 1364 while (entry != NULL){ 1365 msg->content.eg_info = entry->ctrl_info; 1366 dprintk("mpoa: cache_id %u\n", entry->ctrl_info.cache_id); 1367 msg_to_mpoad(msg, mpc); 1368 entry = entry->next; 1369 } 1370 read_unlock_irq(&mpc->egress_lock); 1371 1372 msg->type = action; 1373 msg_to_mpoad(msg, mpc); 1374 return; 1375} 1376 1377static void mpc_timer_refresh(void) 1378{ 1379 mpc_timer.expires = jiffies + (MPC_P2 * HZ); 1380 mpc_timer.data = mpc_timer.expires; 1381 mpc_timer.function = mpc_cache_check; 1382 add_timer(&mpc_timer); 1383 1384 return; 1385} 1386 1387static void mpc_cache_check( unsigned long checking_time ) 1388{ 1389 struct mpoa_client *mpc = mpcs; 1390 static unsigned long previous_resolving_check_time; 1391 static unsigned long previous_refresh_time; 1392 1393 while( mpc != NULL ){ 1394 mpc->in_ops->clear_count(mpc); 1395 mpc->eg_ops->clear_expired(mpc); 1396 if(checking_time - previous_resolving_check_time > mpc->parameters.mpc_p4 * HZ ){ 1397 mpc->in_ops->check_resolving(mpc); 1398 previous_resolving_check_time = checking_time; 1399 } 1400 if(checking_time - previous_refresh_time > mpc->parameters.mpc_p5 * HZ ){ 1401 mpc->in_ops->refresh(mpc); 1402 previous_refresh_time = checking_time; 1403 } 1404 mpc = mpc->next; 1405 } 1406 mpc_timer_refresh(); 1407 1408 return; 1409} 1410 1411static int atm_mpoa_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 1412{ 1413 int err = 0; 1414 struct atm_vcc *vcc = ATM_SD(sock); 1415 1416 if (cmd != ATMMPC_CTRL && cmd != ATMMPC_DATA) 1417 return -ENOIOCTLCMD; 1418 1419 if (!capable(CAP_NET_ADMIN)) 1420 return -EPERM; 1421 1422 switch (cmd) { 1423 case ATMMPC_CTRL: 1424 err = atm_mpoa_mpoad_attach(vcc, (int)arg); 1425 if (err >= 0) 1426 sock->state = SS_CONNECTED; 1427 break; 1428 case ATMMPC_DATA: 1429 err = atm_mpoa_vcc_attach(vcc, (void __user *)arg); 1430 break; 1431 default: 1432 break; 1433 } 1434 return err; 1435} 1436 1437 1438static struct atm_ioctl atm_ioctl_ops = { 1439 .owner = THIS_MODULE, 1440 .ioctl = atm_mpoa_ioctl, 1441}; 1442 1443static __init int atm_mpoa_init(void) 1444{ 1445 register_atm_ioctl(&atm_ioctl_ops); 1446 1447 if (mpc_proc_init() != 0) 1448 printk(KERN_INFO "mpoa: failed to initialize /proc/mpoa\n"); 1449 1450 printk("mpc.c: " __DATE__ " " __TIME__ " initialized\n"); 1451 1452 return 0; 1453} 1454 1455static 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 mpc_proc_clean(); 1462 1463 del_timer(&mpc_timer); 1464 unregister_netdevice_notifier(&mpoa_notifier); 1465 deregister_atm_ioctl(&atm_ioctl_ops); 1466 1467 mpc = mpcs; 1468 mpcs = NULL; 1469 while (mpc != NULL) { 1470 tmp = mpc->next; 1471 if (mpc->dev != NULL) { 1472 stop_mpc(mpc); 1473 priv = netdev_priv(mpc->dev); 1474 if (priv->lane2_ops != NULL) 1475 priv->lane2_ops->associate_indicator = NULL; 1476 } 1477 ddprintk("mpoa: cleanup_module: about to clear caches\n"); 1478 mpc->in_ops->destroy_cache(mpc); 1479 mpc->eg_ops->destroy_cache(mpc); 1480 ddprintk("mpoa: cleanup_module: caches cleared\n"); 1481 kfree(mpc->mps_macs); 1482 memset(mpc, 0, sizeof(struct mpoa_client)); 1483 ddprintk("mpoa: cleanup_module: about to kfree %p\n", mpc); 1484 kfree(mpc); 1485 ddprintk("mpoa: cleanup_module: next mpc is at %p\n", tmp); 1486 mpc = tmp; 1487 } 1488 1489 qos = qos_head; 1490 qos_head = NULL; 1491 while (qos != NULL) { 1492 nextqos = qos->next; 1493 dprintk("mpoa: cleanup_module: freeing qos entry %p\n", qos); 1494 kfree(qos); 1495 qos = nextqos; 1496 } 1497 1498 return; 1499} 1500 1501module_init(atm_mpoa_init); 1502module_exit(atm_mpoa_cleanup); 1503 1504MODULE_LICENSE("GPL"); 1505