?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
* added 0.99 linux version
[mascara-docs.git] / i386 / linux / linux-2.3.21 / net / atm / mpc.c
blobdc00d23c1df2871bfcf3fcd3b0b5a082ea11878e
1 #include <linux/kernel.h>
2 #include <linux/string.h>
3 #include <linux/timer.h>
4 #include <linux/init.h>
5
6 /* We are an ethernet device */
7 #include <linux/if_ether.h>
8 #include <linux/netdevice.h>
9 #include <linux/etherdevice.h>
10 #include <net/sock.h>
11 #include <linux/skbuff.h>
12 #include <linux/ip.h>
13 #include <asm/byteorder.h>
14 #include <asm/uaccess.h>
15 #include <asm/checksum.h> /* for ip_fast_csum() */
16 #include <net/arp.h>
17 #include <net/dst.h>
18 #include <linux/proc_fs.h>
19
20 /* And atm device */
21 #include <linux/atmdev.h>
22 #include <linux/atmlec.h>
23 #include <linux/atmmpc.h>
24 /* Modular too */
25 #include <linux/config.h>
26 #include <linux/module.h>
27
28 #include "lec.h"
29 #include "mpc.h"
30 #include "tunable.h"
31 #include "resources.h" /* for bind_vcc() */
32
33 /*
34 * mpc.c: Implementation of MPOA client kernel part
35 */
36
37 #if 0
38 #define dprintk printk /* debug */
39 #else
40 #define dprintk(format,args...)
41 #endif
42
43 #if 0
44 #define ddprintk printk /* more debug */
45 #else
46 #define ddprintk(format,args...)
47 #endif
48
49
50
51 #define MPOA_TAG_LEN 4
52
53 /* mpc_daemon -> kernel */
54 static void MPOA_trigger_rcvd (struct k_message *msg, struct mpoa_client *mpc);
55 static void MPOA_res_reply_rcvd(struct k_message *msg, struct mpoa_client *mpc);
56 static void ingress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc);
57 static void egress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc);
58 static void mps_death(struct k_message *msg, struct mpoa_client *mpc);
59 static void clean_up(struct k_message *msg, struct mpoa_client *mpc, int action);
60 static void MPOA_cache_impos_rcvd(struct k_message *msg, struct mpoa_client *mpc);
61 static void set_mpc_ctrl_addr_rcvd(struct k_message *mesg, struct mpoa_client *mpc);
62 static void set_mps_mac_addr_rcvd(struct k_message *mesg, struct mpoa_client *mpc);
63
64 static uint8_t *copy_macs(struct mpoa_client *mpc, uint8_t *router_mac,
65 uint8_t *tlvs, uint8_t mps_macs, uint8_t device_type);
66 static void purge_egress_shortcut(struct atm_vcc *vcc, eg_cache_entry *entry);
67
68 static void send_set_mps_ctrl_addr(char *addr, struct mpoa_client *mpc);
69 static void mpoad_close(struct atm_vcc *vcc);
70 static int msg_from_mpoad(struct atm_vcc *vcc, struct sk_buff *skb);
71
72 static void mpc_push(struct atm_vcc *vcc, struct sk_buff *skb);
73 static int mpc_send_packet(struct sk_buff *skb, struct net_device *dev);
74 static int mpoa_event_listener(struct notifier_block *mpoa_notifier, unsigned long event, void *dev);
75 static void mpc_timer_refresh(void);
76 static void mpc_cache_check( unsigned long checking_time );
77
78 static struct llc_snap_hdr llc_snap_mpoa_ctrl = {
79 0xaa, 0xaa, 0x03,
80 {0x00, 0x00, 0x5e},
81 {0x00, 0x03} /* For MPOA control PDUs */
82 };
83 static struct llc_snap_hdr llc_snap_mpoa_data = {
84 0xaa, 0xaa, 0x03,
85 {0x00, 0x00, 0x00},
86 {0x08, 0x00} /* This is for IP PDUs only */
87 };
88 static struct llc_snap_hdr llc_snap_mpoa_data_tagged = {
89 0xaa, 0xaa, 0x03,
90 {0x00, 0x00, 0x00},
91 {0x88, 0x4c} /* This is for tagged data PDUs */
92 };
93
94 static struct notifier_block mpoa_notifier = {
95 mpoa_event_listener,
96 NULL,
97 0
98 };
99
100 #ifdef CONFIG_PROC_FS
101 extern int mpc_proc_init(void);
102 extern void mpc_proc_clean(void);
103 #endif
104
105 struct mpoa_client *mpcs = NULL; /* FIXME */
106 static struct atm_mpoa_qos *qos_head = NULL;
107 static struct timer_list mpc_timer;
108
109
110 static struct mpoa_client *find_mpc_by_itfnum(int itf)
111 {
112 struct mpoa_client *mpc;
113
114 mpc = mpcs; /* our global linked list */
115 while (mpc != NULL) {
116 if (mpc->dev_num == itf)
117 return mpc;
118 mpc = mpc->next;
119 }
120
121 return NULL; /* not found */
122 }
123
124 static struct mpoa_client *find_mpc_by_vcc(struct atm_vcc *vcc)
125 {
126 struct mpoa_client *mpc;
127
128 mpc = mpcs; /* our global linked list */
129 while (mpc != NULL) {
130 if (mpc->mpoad_vcc == vcc)
131 return mpc;
132 mpc = mpc->next;
133 }
134
135 return NULL; /* not found */
136 }
137
138 static struct mpoa_client *find_mpc_by_lec(struct net_device *dev)
139 {
140 struct mpoa_client *mpc;
141
142 mpc = mpcs; /* our global linked list */
143 while (mpc != NULL) {
144 if (mpc->dev == dev)
145 return mpc;
146 mpc = mpc->next;
147 }
148
149 return NULL; /* not found */
150 }
151
152 /*
153 * Functions for managing QoS list
154 */
155
156 /*
157 * Overwrites the old entry or makes a new one.
158 */
159 struct atm_mpoa_qos *atm_mpoa_add_qos(uint32_t dst_ip, struct atm_qos *qos)
160 {
161 struct atm_mpoa_qos *entry;
162
163 entry = atm_mpoa_search_qos(dst_ip);
164 if (entry != NULL) {
165 entry->qos = *qos;
166 return entry;
167 }
168
169 entry = kmalloc(sizeof(struct atm_qos), GFP_KERNEL);
170 if (entry == NULL) {
171 printk("mpoa: atm_mpoa_add_qos: out of memory\n");
172 return entry;
173 }
174
175 entry->ipaddr = dst_ip;
176 entry->qos = *qos;
177
178 entry->next = qos_head;
179 qos_head = entry;
180
181 return entry;
182 }
183
184 struct atm_mpoa_qos *atm_mpoa_search_qos(uint32_t dst_ip)
185 {
186 struct atm_mpoa_qos *qos;
187
188 qos = qos_head;
189 while( qos != NULL ){
190 if(qos->ipaddr == dst_ip) {
191 break;
192 }
193 qos = qos->next;
194 }
195
196 return qos;
197 }
198
199 /*
200 * Returns 0 for failure
201 */
202 int atm_mpoa_delete_qos(struct atm_mpoa_qos *entry)
203 {
204
205 struct atm_mpoa_qos *curr;
206
207 if (entry == NULL) return 0;
208 if (entry == qos_head) {
209 qos_head = qos_head->next;
210 kfree(entry);
211 return 1;
212 }
213
214 curr = qos_head;
215 while (curr != NULL) {
216 if (curr->next == entry) {
217 curr->next = entry->next;
218 kfree(entry);
219 return 1;
220 }
221 curr = curr->next;
222 }
223
224 return 0;
225 }
226
227 void atm_mpoa_disp_qos(char *page, int *len)
228 {
229
230 unsigned char *ip;
231 char ipaddr[16];
232 struct atm_mpoa_qos *qos;
233
234 qos = qos_head;
235 *len += sprintf(page + *len, "QoS entries for shortcuts:\n");
236 *len += sprintf(page + *len, "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 ipaddr[sizeof(ipaddr)-1] = '\0';
239 while (qos != NULL) {
240 ip = (unsigned char *)&qos->ipaddr;
241 sprintf(ipaddr, "%d.%d.%d.%d", ip[0], ip[1], ip[2], ip[3]);
242 *len += sprintf(page + *len, "%-16s\n %-7d %-7d %-7d %-7d %-7d\n %-7d %-7d %-7d %-7d %-7d\n",
243 ipaddr,
244 qos->qos.txtp.max_pcr, qos->qos.txtp.pcr, qos->qos.txtp.min_pcr, qos->qos.txtp.max_cdv, qos->qos.txtp.max_sdu,
245 qos->qos.rxtp.max_pcr, qos->qos.rxtp.pcr, qos->qos.rxtp.min_pcr, qos->qos.rxtp.max_cdv, qos->qos.rxtp.max_sdu);
246 qos = qos->next;
247 }
248
249 return;
250 }
251
252 static struct net_device *find_lec_by_itfnum(int itf)
253 {
254 extern struct atm_lane_ops atm_lane_ops; /* in common.c */
255
256 if (atm_lane_ops.get_lecs == NULL)
257 return NULL;
258
259 return atm_lane_ops.get_lecs()[itf]; /* FIXME: something better */
260 }
261
262 static struct mpoa_client *alloc_mpc(void)
263 {
264 struct mpoa_client *mpc;
265
266 mpc = kmalloc(sizeof (struct mpoa_client), GFP_KERNEL);
267 if (mpc == NULL)
268 return NULL;
269 memset(mpc, 0, sizeof(struct mpoa_client));
270 #if 0 /* compiler seems to barf on this */
271 mpc->ingress_lock = RW_LOCK_UNLOCKED;
272 mpc->egress_lock = RW_LOCK_UNLOCKED;
273 #endif
274 mpc->next = mpcs;
275 atm_mpoa_init_cache(mpc);
276
277 mpc->parameters.mpc_p1 = MPC_P1;
278 mpc->parameters.mpc_p2 = MPC_P2;
279 memset(mpc->parameters.mpc_p3,0,sizeof(mpc->parameters.mpc_p3));
280 mpc->parameters.mpc_p4 = MPC_P4;
281 mpc->parameters.mpc_p5 = MPC_P5;
282 mpc->parameters.mpc_p6 = MPC_P6;
283
284 mpcs = mpc;
285
286 return mpc;
287 }
288
289 /*
290 *
291 * start_mpc() puts the MPC on line. All the packets destined
292 * to the lec underneath us are now being monitored and
293 * shortcuts will be established.
294 *
295 */
296 static void start_mpc(struct mpoa_client *mpc, struct net_device *dev)
297 {
298
299 dprintk("mpoa: (%s) start_mpc:\n", mpc->dev->name);
300 if (dev->hard_start_xmit == NULL) {
301 printk("mpoa: (%s) start_mpc: dev->hard_start_xmit == NULL, not starting\n",
302 dev->name);
303 return;
304 }
305 mpc->old_hard_start_xmit = dev->hard_start_xmit;
306 dev->hard_start_xmit = mpc_send_packet;
307
308 return;
309 }
310
311 static void stop_mpc(struct mpoa_client *mpc)
312 {
313
314 dprintk("mpoa: (%s) stop_mpc:", mpc->dev->name);
315
316 /* Lets not nullify lec device's dev->hard_start_xmit */
317 if (mpc->dev->hard_start_xmit != mpc_send_packet) {
318 dprintk(" mpc already stopped, not fatal\n");
319 return;
320 }
321 dprintk("\n");
322 mpc->dev->hard_start_xmit = mpc->old_hard_start_xmit;
323 mpc->old_hard_start_xmit = NULL;
324 /* close_shortcuts(mpc); ??? FIXME */
325
326 return;
327 }
328
329 static const char *mpoa_device_type_string (char type)
330 {
331 switch(type) {
332 case NON_MPOA:
333 return "non-MPOA device";
334 break;
335 case MPS:
336 return "MPS";
337 break;
338 case MPC:
339 return "MPC";
340 break;
341 case MPS_AND_MPC:
342 return "both MPS and MPC";
343 break;
344 default:
345 return "unspecified (non-MPOA) device";
346 break;
347 }
348
349 return ""; /* not reached */
350 }
351
352 /*
353 * lec device calls this via its dev->priv->lane2_ops->associate_indicator()
354 * when it sees a TLV in LE_ARP packet.
355 * We fill in the pointer above when we see a LANE2 lec initializing
356 * See LANE2 spec 3.1.5
357 *
358 * Quite a big and ugly function but when you look at it
359 * all it does is to try to locate and parse MPOA Device
360 * Type TLV.
361 * We give our lec a pointer to this function and when the
362 * lec sees a TLV it uses the pointer to call this function.
363 *
364 */
365 static void lane2_assoc_ind(struct net_device *dev, uint8_t *mac_addr,
366 uint8_t *tlvs, uint32_t sizeoftlvs)
367 {
368 uint32_t type;
369 uint8_t length, mpoa_device_type, number_of_mps_macs;
370 uint8_t *end_of_tlvs;
371 struct mpoa_client *mpc;
372
373 mpoa_device_type = number_of_mps_macs = 0; /* silence gcc */
374 dprintk("mpoa: (%s) lane2_assoc_ind: received TLV(s), ", dev->name);
375 dprintk("total length of all TLVs %d\n", sizeoftlvs);
376 mpc = find_mpc_by_lec(dev); /* Sampo-Fix: moved here from below */
377 if (mpc == NULL) {
378 printk("mpoa: (%s) lane2_assoc_ind: no mpc\n", dev->name);
379 return;
380 }
381 end_of_tlvs = tlvs + sizeoftlvs;
382 while (end_of_tlvs - tlvs >= 5) {
383 type = (tlvs[0] << 24) | (tlvs[1] << 16) | (tlvs[2] << 8) | tlvs[3];
384 length = tlvs[4];
385 tlvs += 5;
386 dprintk(" type 0x%x length %02x\n", type, length);
387 if (tlvs + length > end_of_tlvs) {
388 printk("TLV value extends past its buffer, aborting parse\n");
389 return;
390 }
391
392 if (type == 0) {
393 printk("mpoa: (%s) lane2_assoc_ind: TLV type was 0, returning\n", dev->name);
394 return;
395 }
396
397 if (type != TLV_MPOA_DEVICE_TYPE) {
398 tlvs += length;
399 continue; /* skip other TLVs */
400 }
401 mpoa_device_type = *tlvs++;
402 number_of_mps_macs = *tlvs++;
403 dprintk("mpoa: (%s) MPOA device type '%s', ", dev->name, mpoa_device_type_string(mpoa_device_type));
404 if (mpoa_device_type == MPS_AND_MPC &&
405 length < (42 + number_of_mps_macs*ETH_ALEN)) { /* :) */
406 printk("\nmpoa: (%s) lane2_assoc_ind: short MPOA Device Type TLV\n",
407 dev->name);
408 continue;
409 }
410 if ((mpoa_device_type == MPS || mpoa_device_type == MPC)
411 && length < 22 + number_of_mps_macs*ETH_ALEN) {
412 printk("\nmpoa: (%s) lane2_assoc_ind: short MPOA Device Type TLV\n",
413 dev->name);
414 continue;
415 }
416 if (mpoa_device_type != MPS && mpoa_device_type != MPS_AND_MPC) {
417 dprintk("ignoring non-MPS device\n");
418 if (mpoa_device_type == MPC) tlvs += 20;
419 continue; /* we are only interested in MPSs */
420 }
421 if (number_of_mps_macs == 0 && mpoa_device_type == MPS_AND_MPC) {
422 printk("\nmpoa: (%s) lane2_assoc_ind: MPS_AND_MPC has zero MACs\n", dev->name);
423 continue; /* someone should read the spec */
424 }
425 dprintk("this MPS has %d MAC addresses\n", number_of_mps_macs);
426
427 /* ok, now we can go and tell our daemon the control address of MPS */
428 send_set_mps_ctrl_addr(tlvs, mpc);
429
430 tlvs = copy_macs(mpc, mac_addr, tlvs, number_of_mps_macs, mpoa_device_type);
431 if (tlvs == NULL) return;
432 }
433 if (end_of_tlvs - tlvs != 0)
434 printk("mpoa: (%s) lane2_assoc_ind: ignoring %d bytes of trailing TLV carbage\n",
435 dev->name, end_of_tlvs - tlvs);
436 return;
437 }
438
439 /*
440 * Store at least advertizing router's MAC address
441 * plus the possible MAC address(es) to mpc->mps_macs.
442 * For a freshly allocated MPOA client mpc->mps_macs == 0.
443 */
444 static uint8_t *copy_macs(struct mpoa_client *mpc, uint8_t *router_mac,
445 uint8_t *tlvs, uint8_t mps_macs, uint8_t device_type)
446 {
447 int num_macs;
448 num_macs = (mps_macs > 1) ? mps_macs : 1;
449
450 if (mpc->number_of_mps_macs != num_macs) { /* need to reallocate? */
451 if (mpc->number_of_mps_macs != 0) kfree(mpc->mps_macs);
452 mpc->number_of_mps_macs = 0;
453 mpc->mps_macs = kmalloc(num_macs*ETH_ALEN, GFP_KERNEL);
454 if (mpc->mps_macs == NULL) {
455 printk("mpoa: (%s) copy_macs: out of mem\n", mpc->dev->name);
456 return NULL;
457 }
458 }
459 memcpy(mpc->mps_macs, router_mac, ETH_ALEN);
460 tlvs += 20; if (device_type == MPS_AND_MPC) tlvs += 20;
461 if (mps_macs > 0)
462 memcpy(mpc->mps_macs, tlvs, mps_macs*ETH_ALEN);
463 tlvs += mps_macs*ETH_ALEN;
464 mpc->number_of_mps_macs = num_macs;
465
466 return tlvs;
467 }
468
469 /* FIXME: tarvitsee työtä */
470 static int send_via_shortcut(struct sk_buff *skb, struct mpoa_client *mpc)
471 {
472 in_cache_entry *entry;
473 struct iphdr *iph;
474 char *buff;
475 uint32_t ipaddr = 0;
476
477 static struct {
478 struct llc_snap_hdr hdr;
479 uint32_t tag;
480 } tagged_llc_snap_hdr = {
481 {0xaa, 0xaa, 0x03, {0x00, 0x00, 0x00}, {0x88, 0x4c}},
482 0
483 };
484
485 buff = skb->data + mpc->dev->hard_header_len;
486 iph = (struct iphdr *)buff;
487 ipaddr = iph->daddr;
488
489 ddprintk("mpoa: (%s) send_via_shortcut: ipaddr 0x%x\n", mpc->dev->name, ipaddr);
490
491 entry = mpc->in_ops->search(ipaddr, mpc);
492 if (entry == NULL) {
493 mpc->in_ops->new_entry(ipaddr, mpc);
494 return 1;
495 }
496 if (mpc->in_ops->cache_hit(entry, mpc) != OPEN){ /* threshold not exceeded or VCC not ready */
497 ddprintk("mpoa: (%s) send_via_shortcut: cache_hit: returns != OPEN\n", mpc->dev->name);
498 return 1;
499 }
500
501 ddprintk("mpoa: (%s) send_via_shortcut: using shortcut\n", mpc->dev->name);
502 /* MPOA spec A.1.4, MPOA client must decrement IP ttl at least by one */
503 if (iph->ttl <= 1) {
504 ddprintk("mpoa: (%s) send_via_shortcut: IP ttl = %u, using LANE\n", mpc->dev->name, iph->ttl);
505 return 1;
506 }
507 iph->ttl--;
508 iph->check = 0;
509 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
510
511 if (entry->ctrl_info.tag != 0) {
512 ddprintk("mpoa: (%s) send_via_shortcut: adding tag 0x%x\n", mpc->dev->name, entry->ctrl_info.tag);
513 tagged_llc_snap_hdr.tag = entry->ctrl_info.tag;
514 skb_pull(skb, ETH_HLEN); /* get rid of Eth header */
515 skb_push(skb, sizeof(tagged_llc_snap_hdr)); /* add LLC/SNAP header */
516 memcpy(skb->data, &tagged_llc_snap_hdr, sizeof(tagged_llc_snap_hdr));
517 } else {
518 skb_pull(skb, ETH_HLEN); /* get rid of Eth header */
519 skb_push(skb, sizeof(struct llc_snap_hdr)); /* add LLC/SNAP header + tag */
520 memcpy(skb->data, &llc_snap_mpoa_data, sizeof(struct llc_snap_hdr));
521 }
522
523 atomic_add(skb->truesize, &entry->shortcut->tx_inuse);
524 ATM_SKB(skb)->iovcnt = 0; /* just to be safe ... */
525 ATM_SKB(skb)->atm_options = entry->shortcut->atm_options;
526 entry->shortcut->dev->ops->send(entry->shortcut, skb);
527 entry->packets_fwded++;
528
529 return 0;
530 }
531
532 /*
533 * Probably needs some error checks and locking, not sure...
534 */
535 static int mpc_send_packet(struct sk_buff *skb, struct net_device *dev)
536 {
537 int retval;
538 struct mpoa_client *mpc;
539 struct ethhdr *eth;
540 int i = 0;
541
542 mpc = find_mpc_by_lec(dev); /* this should NEVER fail */
543 if(mpc == NULL) {
544 printk("mpoa: (%s) mpc_send_packet: no MPC found\n", dev->name);
545 goto non_ip;
546 }
547
548 eth = (struct ethhdr *)skb->data;
549 if (eth->h_proto != htons(ETH_P_IP))
550 goto non_ip; /* Multi-Protocol Over ATM :-) */
551
552 while (i < mpc->number_of_mps_macs) {
553 if (memcmp(eth->h_dest, (mpc->mps_macs + i*ETH_ALEN), ETH_ALEN) == 0)
554 if ( send_via_shortcut(skb, mpc) == 0 ) /* try shortcut */
555 return 0; /* success! */
556 i++;
557 }
558
559 non_ip:
560 retval = mpc->old_hard_start_xmit(skb,dev);
561
562 return retval;
563 }
564
565 int atm_mpoa_vcc_attach(struct atm_vcc *vcc, long arg)
566 {
567 int bytes_left;
568 struct mpoa_client *mpc;
569 struct atmmpc_ioc ioc_data;
570 in_cache_entry *in_entry;
571 uint32_t ipaddr;
572 unsigned char *ip;
573
574 bytes_left = copy_from_user(&ioc_data, (void *)arg, sizeof(struct atmmpc_ioc));
575 if (bytes_left != 0) {
576 printk("mpoa: mpc_vcc_attach: Short read (missed %d bytes) from userland\n", bytes_left);
577 return -EFAULT;
578 }
579 ipaddr = ioc_data.ipaddr;
580 if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF)
581 return -EINVAL;
582
583 mpc = find_mpc_by_itfnum(ioc_data.dev_num);
584 if (mpc == NULL)
585 return -EINVAL;
586
587 if (ioc_data.type == MPC_SOCKET_INGRESS) {
588 in_entry = mpc->in_ops->search(ipaddr, mpc);
589 if (in_entry == NULL || in_entry->entry_state < INGRESS_RESOLVED) {
590 printk("mpoa: (%s) mpc_vcc_attach: did not find RESOLVED entry from ingress cache\n",
591 mpc->dev->name);
592 return -EINVAL;
593 }
594 ip = (unsigned char*)&in_entry->ctrl_info.in_dst_ip;
595 printk("mpoa: (%s) mpc_vcc_attach: attaching ingress SVC, entry = %u.%u.%u.%u\n",
596 mpc->dev->name, ip[0], ip[1], ip[2], ip[3]);
597 in_entry->shortcut = vcc;
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->search_by_vcc(vcc, mpc);
625 if (in_entry) {
626 unsigned char *ip = (unsigned char *)&in_entry->ctrl_info.in_dst_ip;
627 dprintk("mpoa: (%s) mpc_vcc_close: ingress SVC closed ip = %u.%u.%u.%u\n",
628 mpc->dev->name, ip[0], ip[1], ip[2], ip[3]);
629 in_entry->shortcut = NULL;
630 }
631 eg_entry = mpc->eg_ops->search_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 }
636
637 if (in_entry == NULL && eg_entry == NULL)
638 dprintk("mpoa: (%s) mpc_vcc_close: unused vcc closed\n", dev->name);
639
640 return;
641 }
642
643 static void mpc_push(struct atm_vcc *vcc, struct sk_buff *skb)
644 {
645 struct net_device *dev = (struct net_device *)vcc->proto_data;
646 struct sk_buff *new_skb;
647 eg_cache_entry *eg;
648 struct mpoa_client *mpc;
649 uint32_t tag;
650 char *tmp;
651
652 ddprintk("mpoa: (%s) mpc_push:\n", dev->name);
653 if (skb == NULL) {
654 dprintk("mpoa: (%s) mpc_push: null skb, closing VCC\n", dev->name);
655 mpc_vcc_close(vcc, dev);
656 return;
657 }
658
659 skb->dev = dev;
660 if (memcmp(skb->data, &llc_snap_mpoa_ctrl, sizeof(struct llc_snap_hdr)) == 0) {
661 dprintk("mpoa: (%s) mpc_push: control packet arrived\n", dev->name);
662 skb_queue_tail(&vcc->recvq, skb); /* Pass control packets to daemon */
663 wake_up(&vcc->sleep);
664 return;
665 }
666
667 /* data coming over the shortcut */
668 atm_return(vcc, skb->truesize);
669
670 mpc = find_mpc_by_lec(dev);
671 if (mpc == NULL) {
672 printk("mpoa: (%s) mpc_push: unknown MPC\n", dev->name);
673 return;
674 }
675
676 if (memcmp(skb->data, &llc_snap_mpoa_data_tagged, sizeof(struct llc_snap_hdr)) == 0) { /* MPOA tagged data */
677 ddprintk("mpoa: (%s) mpc_push: tagged data packet arrived\n", dev->name);
678
679 } else if (memcmp(skb->data, &llc_snap_mpoa_data, sizeof(struct llc_snap_hdr)) == 0) { /* MPOA data */
680 printk("mpoa: (%s) mpc_push: non-tagged data packet arrived\n", dev->name);
681 printk(" mpc_push: non-tagged data unsupported, purging\n");
682 kfree_skb(skb);
683 return;
684 } else {
685 printk("mpoa: (%s) mpc_push: garbage arrived, purging\n", dev->name);
686 kfree_skb(skb);
687 return;
688 }
689
690 tmp = skb->data + sizeof(struct llc_snap_hdr);
691 tag = *(uint32_t *)tmp;
692
693 eg = mpc->eg_ops->search_by_tag(tag, mpc);
694 if (eg == NULL) {
695 printk("mpoa: (%s) mpc_push: Didn't find egress cache entry, tag = %u\n",
696 dev->name,tag);
697 purge_egress_shortcut(vcc, NULL);
698 kfree_skb(skb);
699 return;
700 }
701
702 /*
703 * See if ingress MPC is using shortcut we opened as a return channel.
704 * This means we have a bi-directional vcc opened by us.
705 */
706 if (eg->shortcut == NULL) {
707 eg->shortcut = vcc;
708 printk("mpoa: (%s) mpc_push: egress SVC in use\n", dev->name);
709 }
710
711 skb_pull(skb, sizeof(struct llc_snap_hdr) + sizeof(tag)); /* get rid of LLC/SNAP header */
712 new_skb = skb_realloc_headroom(skb, eg->ctrl_info.DH_length); /* LLC/SNAP is shorter than MAC header :( */
713 kfree_skb(skb);
714 if (new_skb == NULL) return;
715 skb_push(new_skb, eg->ctrl_info.DH_length); /* add MAC header */
716 memcpy(new_skb->data, eg->ctrl_info.DLL_header, eg->ctrl_info.DH_length);
717 new_skb->protocol = eth_type_trans(new_skb, dev);
718 new_skb->nh.raw = new_skb->data;
719
720 eg->latest_ip_addr = new_skb->nh.iph->saddr;
721 eg->packets_rcvd++;
722
723 netif_rx(new_skb);
724
725 return;
726 }
727
728 static struct atmdev_ops mpc_ops = { /* only send is required */
729 NULL, /* dev_close */
730 NULL, /* open */
731 mpoad_close, /* close */
732 NULL, /* ioctl */
733 NULL, /* getsockopt */
734 NULL, /* setsockopt */
735 msg_from_mpoad, /* send */
736 NULL, /* sg_send */
737 NULL, /* send_oam */
738 NULL, /* phy_put */
739 NULL, /* phy_get */
740 NULL, /* feedback */
741 NULL, /* change_qos */
742 NULL, /* free_rx_skb */
743 NULL /* proc_read */
744 };
745
746 static struct atm_dev mpc_dev = {
747 &mpc_ops, /* device operations */
748 NULL, /* PHY operations */
749 "mpc", /* device type name */
750 42, /* device index (dummy) */
751 NULL, /* VCC table */
752 NULL, /* last VCC */
753 NULL, /* per-device data */
754 NULL, /* private PHY data */
755 0, /* device flags */
756 NULL, /* local ATM address */
757 { 0 } /* no ESI */
758 /* rest of the members will be 0 */
759 };
760
761 int atm_mpoa_mpoad_attach (struct atm_vcc *vcc, int arg)
762 {
763 struct mpoa_client *mpc;
764 struct lec_priv *priv;
765
766 if (mpcs == NULL) {
767 init_timer(&mpc_timer);
768 mpc_timer_refresh();
769
770 /* This lets us now how our LECs are doing */
771 register_netdevice_notifier(&mpoa_notifier);
772 }
773
774 mpc = find_mpc_by_itfnum(arg);
775 if (mpc == NULL) {
776 dprintk("mpoa: mpoad_attach: allocating new mpc for itf %d\n", arg);
777 mpc = alloc_mpc();
778 mpc->dev_num = arg;
779 mpc->dev = find_lec_by_itfnum(arg); /* NULL if there was no lec */
780 }
781 if (mpc->mpoad_vcc) {
782 printk("mpoa: mpoad_attach: mpoad is already present for itf %d\n", arg);
783 return -EADDRINUSE;
784 }
785
786 if (mpc->dev) { /* check if the lec is LANE2 capable */
787 priv = (struct lec_priv *)mpc->dev->priv;
788 if (priv->lane_version < 2)
789 mpc->dev = NULL;
790 else
791 priv->lane2_ops->associate_indicator = lane2_assoc_ind;
792 }
793
794 mpc->mpoad_vcc = vcc;
795 bind_vcc(vcc, &mpc_dev);
796 vcc->flags |= ATM_VF_READY | ATM_VF_META;
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 MOD_INC_USE_COUNT;
811 return arg;
812 }
813
814 static void send_set_mps_ctrl_addr(char *addr, struct mpoa_client *mpc)
815 {
816 struct k_message mesg;
817
818 memcpy (mpc->mps_ctrl_addr, addr, ATM_ESA_LEN);
819
820 mesg.type = SET_MPS_CTRL_ADDR;
821 memcpy(mesg.MPS_ctrl, addr, ATM_ESA_LEN);
822 msg_to_mpoad(&mesg, mpc);
823
824 return;
825 }
826
827 static void mpoad_close(struct atm_vcc *vcc)
828 {
829 unsigned long flags;
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 }
849
850 /* clear the caches */
851 write_lock_irqsave(&mpc->ingress_lock, flags);
852 while(mpc->in_ops->cache_remove(mpc->in_cache, mpc));
853 write_unlock_irqrestore(&mpc->ingress_lock, flags);
854
855 write_lock_irqsave(&mpc->egress_lock, flags);
856 while(mpc->eg_ops->cache_remove(mpc->eg_cache, mpc));
857 write_unlock_irqrestore(&mpc->egress_lock, flags);
858
859 while ( (skb = skb_dequeue(&vcc->recvq)) ){
860 atm_return(vcc, skb->truesize);
861 kfree_skb(skb);
862 }
863
864 printk("mpoa: (%s) going down\n",
865 (mpc->dev) ? mpc->dev->name : "<unknown>");
866 MOD_DEC_USE_COUNT;
867
868 return;
869 }
870
871 /*
872 *
873 */
874 static int msg_from_mpoad(struct atm_vcc *vcc, struct sk_buff *skb)
875 {
876
877 struct mpoa_client *mpc = find_mpc_by_vcc(vcc);
878 struct k_message *mesg = (struct k_message*)skb->data;
879 atomic_sub(skb->truesize+ATM_PDU_OVHD, &vcc->tx_inuse);
880
881 if (mpc == NULL) {
882 printk("mpoa: msg_from_mpoad: no mpc found\n");
883 return 0;
884 }
885 dprintk("mpoa: (%s) msg_from_mpoad:", (mpc->dev) ? mpc->dev->name : "<unknown>");
886 switch(mesg->type) {
887 case MPOA_RES_REPLY_RCVD:
888 dprintk(" mpoa_res_reply_rcvd\n");
889 MPOA_res_reply_rcvd(mesg, mpc);
890 break;
891 case MPOA_TRIGGER_RCVD:
892 dprintk(" mpoa_trigger_rcvd\n");
893 MPOA_trigger_rcvd(mesg, mpc);
894 break;
895 case INGRESS_PURGE_RCVD:
896 dprintk(" nhrp_purge_rcvd\n");
897 ingress_purge_rcvd(mesg, mpc);
898 break;
899 case EGRESS_PURGE_RCVD:
900 dprintk(" egress_purge_reply_rcvd\n");
901 egress_purge_rcvd(mesg, mpc);
902 break;
903 case MPS_DEATH:
904 dprintk(" mps_death\n");
905 mps_death(mesg, mpc);
906 break;
907 case CACHE_IMPOS_RCVD:
908 dprintk(" cache_impos_rcvd\n");
909 MPOA_cache_impos_rcvd(mesg, mpc);
910 break;
911 case SET_MPC_CTRL_ADDR:
912 dprintk(" set_mpc_ctrl_addr\n");
913 set_mpc_ctrl_addr_rcvd(mesg, mpc);
914 break;
915 case SET_MPS_MAC_ADDR:
916 dprintk(" set_mps_mac_addr\n");
917 set_mps_mac_addr_rcvd(mesg, mpc);
918 break;
919 case CLEAN_UP_AND_EXIT:
920 dprintk(" clean_up_and_exit\n");
921 clean_up(mesg, mpc, DIE);
922 break;
923 case RELOAD:
924 dprintk(" reload\n");
925 clean_up(mesg, mpc, RELOAD);
926 break;
927 case SET_MPC_PARAMS:
928 dprintk(" set_mpc_params\n");
929 mpc->parameters = mesg->content.params;
930 break;
931 default:
932 dprintk(" unknown message %d\n", mesg->type);
933 break;
934 }
935 kfree_skb(skb);
936
937 return 0;
938 }
939
940 int msg_to_mpoad(struct k_message *mesg, struct mpoa_client *mpc)
941 {
942 struct sk_buff *skb;
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 memcpy(skb->data, mesg, sizeof(struct k_message));
954 atm_force_charge(mpc->mpoad_vcc, skb->truesize);
955 skb_queue_tail(&mpc->mpoad_vcc->recvq, skb);
956 wake_up(&mpc->mpoad_vcc->sleep);
957
958 return 0;
959 }
960
961 static int mpoa_event_listener(struct notifier_block *mpoa_notifier, unsigned long event, void *dev_ptr)
962 {
963 struct net_device *dev;
964 struct mpoa_client *mpc;
965 struct lec_priv *priv;
966
967 dev = (struct net_device *)dev_ptr;
968 if (dev->name == NULL || strncmp(dev->name, "lec", 3))
969 return NOTIFY_DONE; /* we are only interested in lec:s */
970
971 switch (event) {
972 case NETDEV_REGISTER: /* a new lec device was allocated */
973 priv = (struct lec_priv *)dev->priv;
974 if (priv->lane_version < 2)
975 break;
976 priv->lane2_ops->associate_indicator = lane2_assoc_ind;
977 mpc = find_mpc_by_itfnum(priv->itfnum);
978 if (mpc == NULL) {
979 dprintk("mpoa: mpoa_event_listener: allocating new mpc for %s\n",
980 dev->name);
981 mpc = alloc_mpc();
982 if (mpc == NULL) {
983 printk("mpoa: mpoa_event_listener: no new mpc");
984 break;
985 }
986 }
987 mpc->dev_num = priv->itfnum;
988 mpc->dev = 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 mpc->dev = NULL;
999 break;
1000 case NETDEV_UP:
1001 /* the dev was ifconfig'ed up */
1002 mpc = find_mpc_by_lec(dev);
1003 if (mpc == NULL)
1004 break;
1005 if (mpc->mpoad_vcc != NULL) {
1006 start_mpc(mpc, dev);
1007 }
1008 break;
1009 case NETDEV_DOWN:
1010 /* the dev was ifconfig'ed down */
1011 /* this means dev->start == 0 and
1012 * 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 *client)
1042 {
1043 uint32_t dst_ip = msg->content.in_info.in_dst_ip;
1044 in_cache_entry *entry;
1045
1046 entry = client->in_ops->search(dst_ip, client);
1047 if( entry == NULL ){
1048 entry = client->in_ops->new_entry(dst_ip, client);
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,client);
1053 do_gettimeofday(&(entry->reply_wait));
1054 return;
1055 }
1056
1057 if( entry->entry_state == INGRESS_INVALID ){
1058 entry->entry_state = INGRESS_RESOLVING;
1059 msg->type = SND_MPOA_RES_RQST;
1060 msg->content.in_info = entry->ctrl_info;
1061 msg_to_mpoad(msg,client);
1062 do_gettimeofday(&(entry->reply_wait));
1063 return;
1064 }
1065
1066 printk("mpoa: (%s) MPOA_trigger_rcvd: entry already in resolving state\n",
1067 (client->dev) ? client->dev->name : "<unknown>");
1068 return;
1069 }
1070
1071 /*
1072 * Things get complicated because we have to check if there's an egress
1073 * shortcut with suitable traffic parameters we could use.
1074 */
1075 static void check_qos_and_open_shortcut(struct k_message *msg, struct mpoa_client *client, in_cache_entry *entry){
1076 uint32_t dst_ip = msg->content.in_info.in_dst_ip;
1077 unsigned char *ip = (unsigned char *)&dst_ip;
1078 struct atm_mpoa_qos *qos = atm_mpoa_search_qos(dst_ip);
1079 eg_cache_entry *eg_entry = client->eg_ops->search_by_src_ip(dst_ip, client);
1080 if(eg_entry && eg_entry->shortcut){
1081 if(eg_entry->shortcut->qos.txtp.traffic_class &
1082 msg->qos.txtp.traffic_class &
1083 (qos ? qos->qos.txtp.traffic_class : ATM_UBR | ATM_CBR)){
1084 if(eg_entry->shortcut->qos.txtp.traffic_class == ATM_UBR)
1085 entry->shortcut = eg_entry->shortcut;
1086 else if(eg_entry->shortcut->qos.txtp.max_pcr > 0)
1087 entry->shortcut = eg_entry->shortcut;
1088 }
1089 if(entry->shortcut){
1090 dprintk("mpoa: (%s) using egress SVC to reach %d.%d.%d.%d\n",client->dev->name, ip[0], ip[1], ip[2], ip[3]);
1091 return;
1092 }
1093 }
1094 /* No luck in the egress cache we must open an ingress SVC */
1095 msg->type = OPEN_INGRESS_SVC;
1096 if (qos && (qos->qos.txtp.traffic_class == msg->qos.txtp.traffic_class))
1097 {
1098 msg->qos = qos->qos;
1099 printk("mpoa: (%s) trying to get a CBR shortcut\n",client->dev->name);
1100 }
1101 else memset(&msg->qos,0,sizeof(struct atm_qos));
1102 msg_to_mpoad(msg, client);
1103 return;
1104 }
1105
1106 static void MPOA_res_reply_rcvd(struct k_message *msg, struct mpoa_client *client)
1107 {
1108 unsigned char *ip;
1109
1110 uint32_t dst_ip = msg->content.in_info.in_dst_ip;
1111 in_cache_entry *entry = client->in_ops->search(dst_ip, client);
1112 ip = (unsigned char *)&dst_ip;
1113 dprintk("mpoa: (%s) MPOA_res_reply_rcvd: ip %d.%d.%d.%d\n", client->dev->name, ip[0], ip[1], ip[2], ip[3]);
1114 ddprintk("mpoa: (%s) MPOA_res_reply_rcvd() entry = %p", client->dev->name, entry);
1115 if(entry == NULL){
1116 printk("\nmpoa: (%s) ARGH, received res. reply for an entry that doesn't exist.\n", client->dev->name);
1117 return;
1118 }
1119 ddprintk(" entry_state = %d ", entry->entry_state);
1120
1121 if (entry->entry_state == INGRESS_RESOLVED) {
1122 printk("\nmpoa: (%s) MPOA_res_reply_rcvd for RESOLVED entry!\n", client->dev->name);
1123 return;
1124 }
1125
1126 entry->ctrl_info = msg->content.in_info;
1127 do_gettimeofday(&(entry->tv));
1128 do_gettimeofday(&(entry->reply_wait)); /* Used in refreshing func from now on */
1129 entry->refresh_time = 0;
1130 ddprintk("entry->shortcut = %p\n", entry->shortcut);
1131
1132 if(entry->entry_state == INGRESS_RESOLVING && entry->shortcut != NULL){
1133 entry->entry_state = INGRESS_RESOLVED;
1134 return; /* Shortcut already open... */
1135 }
1136
1137 if (entry->shortcut != NULL) {
1138 printk("mpoa: (%s) MPOA_res_reply_rcvd: entry->shortcut != NULL, impossible!\n",
1139 client->dev->name);
1140 return;
1141 }
1142
1143 check_qos_and_open_shortcut(msg, client, entry);
1144 entry->entry_state = INGRESS_RESOLVED;
1145
1146 return;
1147
1148 }
1149
1150 static void ingress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc)
1151 {
1152 uint32_t dst_ip = msg->content.in_info.in_dst_ip;
1153 uint32_t mask = msg->ip_mask;
1154 unsigned char *ip = (unsigned char *)&dst_ip;
1155
1156 in_cache_entry *entry = mpc->in_ops->search_with_mask(dst_ip, mpc, mask);
1157 if( entry == NULL ){
1158 printk("mpoa: (%s) ingress_purge_rcvd: recieved a purge for an entry that doesn't exist, ", mpc->dev->name);
1159 printk("ip = %u.%u.%u.%u\n", ip[0], ip[1], ip[2], ip[3]);
1160 return;
1161 }
1162 while(entry != NULL){
1163 dprintk("mpoa: (%s) ingress_purge_rcvd: removing an ingress entry, ip = %u.%u.%u.%u\n" ,
1164 mpc->dev->name, ip[0], ip[1], ip[2], ip[3]);
1165 mpc->in_ops->cache_remove(entry, mpc);
1166 entry = mpc->in_ops->search_with_mask(dst_ip, mpc, mask);
1167 }
1168 return;
1169 }
1170
1171 static void egress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc)
1172 {
1173 unsigned long flags;
1174 uint32_t cache_id = msg->content.eg_info.cache_id;
1175 eg_cache_entry *entry = mpc->eg_ops->search_by_cache_id(cache_id, mpc);
1176
1177 if( entry == NULL ){
1178 printk("mpoa: (%s) egress_purge_rcvd: received a purge reply for an entry that doesn't exist\n", mpc->dev->name);
1179 return;
1180 }
1181
1182 write_lock_irqsave(&mpc->egress_lock, flags);
1183 mpc->eg_ops->cache_remove(entry, mpc);
1184 write_unlock_irqrestore(&mpc->egress_lock, flags);
1185
1186 return;
1187 }
1188
1189 static void purge_egress_shortcut(struct atm_vcc *vcc, eg_cache_entry *entry)
1190 {
1191 struct k_message *purge_msg;
1192 struct sk_buff *skb;
1193
1194 dprintk("mpoa: purge_egress_shortcut: entering\n");
1195 if (vcc == NULL) {
1196 printk("mpoa: purge_egress_shortcut: vcc == NULL\n");
1197 return;
1198 }
1199
1200 skb = alloc_skb(sizeof(struct k_message), GFP_ATOMIC);
1201 if (skb == NULL) {
1202 printk("mpoa: purge_egress_shortcut: out of memory\n");
1203 return;
1204 }
1205
1206 skb_put(skb, sizeof(struct k_message));
1207 memset(skb->data, 0, sizeof(struct k_message));
1208 purge_msg = (struct k_message *)skb->data;
1209 purge_msg->type = DATA_PLANE_PURGE;
1210 if (entry != NULL)
1211 purge_msg->content.eg_info = entry->ctrl_info;
1212
1213 atm_force_charge(vcc, skb->truesize);
1214 skb_queue_tail(&vcc->recvq, skb);
1215 wake_up(&vcc->sleep);
1216 dprintk("mpoa: purge_egress_shortcut: exiting:\n");
1217
1218 return;
1219 }
1220
1221 /*
1222 * Our MPS died. Tell our daemon to send NHRP data plane purge to each
1223 * of the egress shortcuts we have.
1224 */
1225 static void mps_death( struct k_message * msg, struct mpoa_client * mpc )
1226 {
1227
1228 unsigned long flags;
1229 eg_cache_entry *entry;
1230
1231 dprintk("mpoa: (%s) mps_death:\n", mpc->dev->name);
1232
1233 if(memcmp(msg->MPS_ctrl, mpc->mps_ctrl_addr, ATM_ESA_LEN)){
1234 printk("mpoa: (%s) mps_death: wrong MPS\n", mpc->dev->name);
1235 return;
1236 }
1237
1238 entry = mpc->eg_cache;
1239 while (entry != NULL) {
1240 purge_egress_shortcut(entry->shortcut, entry);
1241 entry = entry->next;
1242 }
1243
1244 write_lock_irqsave(&mpc->ingress_lock, flags);
1245 while(mpc->in_ops->cache_remove(mpc->in_cache, mpc));
1246 write_unlock_irqrestore(&mpc->ingress_lock, flags);
1247
1248 write_lock_irqsave(&mpc->egress_lock, flags);
1249 while(mpc->eg_ops->cache_remove(mpc->eg_cache, mpc));
1250 write_unlock_irqrestore(&mpc->egress_lock, flags);
1251
1252 return;
1253 }
1254
1255 static void MPOA_cache_impos_rcvd( struct k_message * msg, struct mpoa_client * mpc){
1256
1257 uint16_t holding_time;
1258 unsigned long flags;
1259 eg_cache_entry *entry = mpc->eg_ops->search_by_cache_id(msg->content.eg_info.cache_id, mpc);
1260
1261 holding_time = msg->content.eg_info.holding_time;
1262 dprintk("mpoa: (%s) MPOA_cache_impos_rcvd: entry = %p, holding_time = %u\n",
1263 mpc->dev->name, entry, holding_time);
1264 if(entry == NULL && holding_time) {
1265 mpc->eg_ops->new_entry(msg, mpc);
1266 return;
1267 }
1268 if(holding_time){
1269 mpc->eg_ops->update(entry, holding_time);
1270 return;
1271 }
1272
1273 write_lock_irqsave(&mpc->egress_lock, flags);
1274 mpc->eg_ops->cache_remove(entry, mpc);
1275 write_unlock_irqrestore(&mpc->egress_lock, flags);
1276
1277
1278 return;
1279 }
1280
1281 static void set_mpc_ctrl_addr_rcvd(struct k_message *mesg, struct mpoa_client *mpc)
1282 {
1283 struct lec_priv *priv;
1284 int i, retval ;
1285
1286 uint8_t tlv[4 + 1 + 1 + 1 + ATM_ESA_LEN];
1287
1288 tlv[0] = 00; tlv[1] = 0xa0; tlv[2] = 0x3e; tlv[3] = 0x2a; /* type */
1289 tlv[4] = 1 + 1 + ATM_ESA_LEN; /* length */
1290 tlv[5] = 0x02; /* MPOA client */
1291 tlv[6] = 0x00; /* number of MPS MAC addresses */
1292
1293 memcpy(&tlv[7], mesg->MPS_ctrl, ATM_ESA_LEN); /* MPC ctrl ATM addr */
1294 memcpy(mpc->our_ctrl_addr, mesg->MPS_ctrl, ATM_ESA_LEN);
1295
1296 dprintk("mpoa: (%s) setting MPC ctrl ATM address to ",
1297 (mpc->dev) ? mpc->dev->name : "<unknown>");
1298 for (i = 7; i < sizeof(tlv); i++)
1299 dprintk("%02x ", tlv[i]);
1300 dprintk("\n");
1301
1302 if (mpc->dev) {
1303 priv = (struct lec_priv *)mpc->dev->priv;
1304 retval = priv->lane2_ops->associate_req(mpc->dev, mpc->dev->dev_addr, tlv, sizeof(tlv));
1305 if (retval == 0)
1306 printk("mpoa: (%s) MPOA device type TLV association failed\n", mpc->dev->name);
1307 retval = priv->lane2_ops->resolve(mpc->dev, NULL, 1, NULL, NULL);
1308 if (retval < 0)
1309 printk("mpoa: (%s) targetless LE_ARP request failed\n", mpc->dev->name);
1310 }
1311
1312 return;
1313 }
1314
1315 static void set_mps_mac_addr_rcvd(struct k_message *msg, struct mpoa_client *client){
1316
1317 if(client->number_of_mps_macs)
1318 kfree(client->mps_macs);
1319 client->number_of_mps_macs = 0;
1320 client->mps_macs = kmalloc(ETH_ALEN,GFP_KERNEL);
1321 if (client->mps_macs == NULL) {
1322 printk("mpoa: set_mps_mac_addr_rcvd: out of memory\n");
1323 return;
1324 }
1325 client->number_of_mps_macs = 1;
1326 memcpy(client->mps_macs, msg->MPS_ctrl, ETH_ALEN);
1327
1328 return;
1329 }
1330
1331 /*
1332 * purge egress cache and tell daemon to 'action' (DIE, RELOAD)
1333 */
1334 static void clean_up(struct k_message *msg, struct mpoa_client *mpc, int action){
1335
1336 unsigned long flags;
1337 eg_cache_entry *entry;
1338 msg->type = SND_EGRESS_PURGE;
1339
1340
1341 read_lock_irqsave(&mpc->egress_lock, flags);
1342 entry = mpc->eg_cache;
1343 while(entry != NULL){
1344 msg->content.eg_info = entry->ctrl_info;
1345 dprintk("mpoa: cache_id %u\n", entry->ctrl_info.cache_id);
1346 msg_to_mpoad(msg, mpc);
1347 entry = entry->next;
1348 }
1349 read_unlock_irqrestore(&mpc->egress_lock, flags);
1350
1351 msg->type = action;
1352 msg_to_mpoad(msg, mpc);
1353 return;
1354 }
1355
1356 static void mpc_timer_refresh()
1357 {
1358 mpc_timer.expires = jiffies + (MPC_P2 * HZ);
1359 mpc_timer.data = mpc_timer.expires;
1360 mpc_timer.function = mpc_cache_check;
1361 add_timer(&mpc_timer);
1362
1363 return;
1364 }
1365
1366 static void mpc_cache_check( unsigned long checking_time )
1367 {
1368 struct mpoa_client *mpc = mpcs;
1369 static unsigned long previous_resolving_check_time = 0;
1370 static unsigned long previous_refresh_time = 0;
1371
1372 while( mpc != NULL ){
1373 mpc->in_ops->clear_count(mpc);
1374 mpc->eg_ops->clear_expired(mpc);
1375 if(checking_time - previous_resolving_check_time > mpc->parameters.mpc_p4 * HZ ){
1376 mpc->in_ops->check_resolving(mpc);
1377 previous_resolving_check_time = checking_time;
1378 }
1379 if(checking_time - previous_refresh_time > mpc->parameters.mpc_p5 * HZ ){
1380 mpc->in_ops->refresh(mpc);
1381 previous_refresh_time = checking_time;
1382 }
1383 mpc = mpc->next;
1384 }
1385 mpc_timer_refresh();
1386
1387 return;
1388 }
1389
1390 void atm_mpoa_init_ops(struct atm_mpoa_ops *ops)
1391 {
1392 ops->mpoad_attach = atm_mpoa_mpoad_attach;
1393 ops->vcc_attach = atm_mpoa_vcc_attach;
1394
1395 #ifdef CONFIG_PROC_FS
1396 if(mpc_proc_init() != 0)
1397 printk(KERN_INFO "mpoa: failed to initialize /proc/mpoa\n");
1398 else
1399 printk(KERN_INFO "mpoa: /proc/mpoa initialized\n");
1400 #endif
1401
1402 printk("mpc.c: " __DATE__ " " __TIME__ " initialized\n");
1403
1404 return;
1405 }
1406
1407 #ifdef MODULE
1408 int init_module(void)
1409 {
1410 extern struct atm_mpoa_ops atm_mpoa_ops;
1411
1412 atm_mpoa_init_ops(&atm_mpoa_ops);
1413
1414 return 0;
1415 }
1416
1417 void cleanup_module(void)
1418 {
1419 extern struct atm_mpoa_ops atm_mpoa_ops;
1420 struct mpoa_client *mpc, *tmp;
1421 struct atm_mpoa_qos *qos, *nextqos;
1422 struct lec_priv *priv;
1423
1424 if (MOD_IN_USE) {
1425 printk("mpc.c: module in use\n");
1426 return;
1427 }
1428 #ifdef CONFIG_PROC_FS
1429 mpc_proc_clean();
1430 #endif
1431
1432 del_timer(&mpc_timer);
1433 unregister_netdevice_notifier(&mpoa_notifier);
1434 atm_mpoa_ops.mpoad_attach = NULL;
1435 atm_mpoa_ops.vcc_attach = NULL;
1436
1437 mpc = mpcs;
1438 mpcs = NULL;
1439 while (mpc != NULL) {
1440 tmp = mpc->next;
1441 if (mpc->dev != NULL) {
1442 stop_mpc(mpc);
1443 priv = (struct lec_priv *)mpc->dev->priv;
1444 if (priv->lane2_ops != NULL)
1445 priv->lane2_ops->associate_indicator = NULL;
1446 }
1447 ddprintk("mpoa: cleanup_module: about to clear caches\n");
1448 while(mpc->in_ops->cache_remove(mpc->in_cache, mpc));
1449 while(mpc->eg_ops->cache_remove(mpc->eg_cache, mpc));
1450 ddprintk("mpoa: cleanup_module: caches cleared\n");
1451 kfree(mpc->mps_macs);
1452 memset(mpc, 0, sizeof(struct mpoa_client));
1453 ddprintk("mpoa: cleanup_module: about to kfree %p\n", mpc);
1454 kfree(mpc);
1455 ddprintk("mpoa: cleanup_module: next mpc is at %p\n", tmp);
1456 mpc = tmp;
1457 }
1458
1459 qos = qos_head;
1460 qos_head = NULL;
1461 while (qos != NULL) {
1462 nextqos = qos->next;
1463 dprintk("mpoa: cleanup_module: freeing qos entry %p\n", qos);
1464 kfree(qos);
1465 qos = nextqos;
1466 }
1467
1468 return;
1469 }
1470 #endif /* MODULE */