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[SCTP]: Correctly handle unexpected INIT-ACK chunk.
[linux-2.6.22.y-op.git] / net / atm / mpc.c
blobc18f73715ef9799acdc6177f3d2470eb4f10f196
1 #include <linux/kernel.h>
2 #include <linux/string.h>
3 #include <linux/timer.h>
4 #include <linux/init.h>
5 #include <linux/bitops.h>
6 #include <linux/capability.h>
7 #include <linux/seq_file.h>
8
9 /* We are an ethernet device */
10 #include <linux/if_ether.h>
11 #include <linux/netdevice.h>
12 #include <linux/etherdevice.h>
13 #include <net/sock.h>
14 #include <linux/skbuff.h>
15 #include <linux/ip.h>
16 #include <asm/byteorder.h>
17 #include <asm/uaccess.h>
18 #include <net/checksum.h> /* for ip_fast_csum() */
19 #include <net/arp.h>
20 #include <net/dst.h>
21 #include <linux/proc_fs.h>
22
23 /* And atm device */
24 #include <linux/atmdev.h>
25 #include <linux/atmlec.h>
26 #include <linux/atmmpc.h>
27 /* Modular too */
28 #include <linux/module.h>
29
30 #include "lec.h"
31 #include "mpc.h"
32 #include "resources.h"
33
34 /*
35 * mpc.c: Implementation of MPOA client kernel part
36 */
37
38 #if 0
39 #define dprintk printk /* debug */
40 #else
41 #define dprintk(format,args...)
42 #endif
43
44 #if 0
45 #define ddprintk printk /* more debug */
46 #else
47 #define ddprintk(format,args...)
48 #endif
49
50
51
52 #define MPOA_TAG_LEN 4
53
54 /* mpc_daemon -> kernel */
55 static void MPOA_trigger_rcvd (struct k_message *msg, struct mpoa_client *mpc);
56 static void MPOA_res_reply_rcvd(struct k_message *msg, struct mpoa_client *mpc);
57 static void ingress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc);
58 static void egress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc);
59 static void mps_death(struct k_message *msg, struct mpoa_client *mpc);
60 static void clean_up(struct k_message *msg, struct mpoa_client *mpc, int action);
61 static void MPOA_cache_impos_rcvd(struct k_message *msg, struct mpoa_client *mpc);
62 static void set_mpc_ctrl_addr_rcvd(struct k_message *mesg, struct mpoa_client *mpc);
63 static void set_mps_mac_addr_rcvd(struct k_message *mesg, struct mpoa_client *mpc);
64
65 static uint8_t *copy_macs(struct mpoa_client *mpc, uint8_t *router_mac,
66 uint8_t *tlvs, uint8_t mps_macs, uint8_t device_type);
67 static void purge_egress_shortcut(struct atm_vcc *vcc, eg_cache_entry *entry);
68
69 static void send_set_mps_ctrl_addr(char *addr, struct mpoa_client *mpc);
70 static void mpoad_close(struct atm_vcc *vcc);
71 static int msg_from_mpoad(struct atm_vcc *vcc, struct sk_buff *skb);
72
73 static void mpc_push(struct atm_vcc *vcc, struct sk_buff *skb);
74 static int mpc_send_packet(struct sk_buff *skb, struct net_device *dev);
75 static int mpoa_event_listener(struct notifier_block *mpoa_notifier, unsigned long event, void *dev);
76 static void mpc_timer_refresh(void);
77 static void mpc_cache_check( unsigned long checking_time );
78
79 static struct llc_snap_hdr llc_snap_mpoa_ctrl = {
80 0xaa, 0xaa, 0x03,
81 {0x00, 0x00, 0x5e},
82 {0x00, 0x03} /* For MPOA control PDUs */
83 };
84 static struct llc_snap_hdr llc_snap_mpoa_data = {
85 0xaa, 0xaa, 0x03,
86 {0x00, 0x00, 0x00},
87 {0x08, 0x00} /* This is for IP PDUs only */
88 };
89 static struct llc_snap_hdr llc_snap_mpoa_data_tagged = {
90 0xaa, 0xaa, 0x03,
91 {0x00, 0x00, 0x00},
92 {0x88, 0x4c} /* This is for tagged data PDUs */
93 };
94
95 static struct notifier_block mpoa_notifier = {
96 mpoa_event_listener,
97 NULL,
98 0
99 };
100
101 struct mpoa_client *mpcs = NULL; /* FIXME */
102 static struct atm_mpoa_qos *qos_head = NULL;
103 static DEFINE_TIMER(mpc_timer, NULL, 0, 0);
104
105
106 static struct mpoa_client *find_mpc_by_itfnum(int itf)
107 {
108 struct mpoa_client *mpc;
109
110 mpc = mpcs; /* our global linked list */
111 while (mpc != NULL) {
112 if (mpc->dev_num == itf)
113 return mpc;
114 mpc = mpc->next;
115 }
116
117 return NULL; /* not found */
118 }
119
120 static struct mpoa_client *find_mpc_by_vcc(struct atm_vcc *vcc)
121 {
122 struct mpoa_client *mpc;
123
124 mpc = mpcs; /* our global linked list */
125 while (mpc != NULL) {
126 if (mpc->mpoad_vcc == vcc)
127 return mpc;
128 mpc = mpc->next;
129 }
130
131 return NULL; /* not found */
132 }
133
134 static struct mpoa_client *find_mpc_by_lec(struct net_device *dev)
135 {
136 struct mpoa_client *mpc;
137
138 mpc = mpcs; /* our global linked list */
139 while (mpc != NULL) {
140 if (mpc->dev == dev)
141 return mpc;
142 mpc = mpc->next;
143 }
144
145 return NULL; /* not found */
146 }
147
148 /*
149 * Functions for managing QoS list
150 */
151
152 /*
153 * Overwrites the old entry or makes a new one.
154 */
155 struct atm_mpoa_qos *atm_mpoa_add_qos(__be32 dst_ip, struct atm_qos *qos)
156 {
157 struct atm_mpoa_qos *entry;
158
159 entry = atm_mpoa_search_qos(dst_ip);
160 if (entry != NULL) {
161 entry->qos = *qos;
162 return entry;
163 }
164
165 entry = kmalloc(sizeof(struct atm_mpoa_qos), GFP_KERNEL);
166 if (entry == NULL) {
167 printk("mpoa: atm_mpoa_add_qos: out of memory\n");
168 return entry;
169 }
170
171 entry->ipaddr = dst_ip;
172 entry->qos = *qos;
173
174 entry->next = qos_head;
175 qos_head = entry;
176
177 return entry;
178 }
179
180 struct atm_mpoa_qos *atm_mpoa_search_qos(__be32 dst_ip)
181 {
182 struct atm_mpoa_qos *qos;
183
184 qos = qos_head;
185 while( qos != NULL ){
186 if(qos->ipaddr == dst_ip) {
187 break;
188 }
189 qos = qos->next;
190 }
191
192 return qos;
193 }
194
195 /*
196 * Returns 0 for failure
197 */
198 int atm_mpoa_delete_qos(struct atm_mpoa_qos *entry)
199 {
200
201 struct atm_mpoa_qos *curr;
202
203 if (entry == NULL) return 0;
204 if (entry == qos_head) {
205 qos_head = qos_head->next;
206 kfree(entry);
207 return 1;
208 }
209
210 curr = qos_head;
211 while (curr != NULL) {
212 if (curr->next == entry) {
213 curr->next = entry->next;
214 kfree(entry);
215 return 1;
216 }
217 curr = curr->next;
218 }
219
220 return 0;
221 }
222
223 /* this is buggered - we need locking for qos_head */
224 void atm_mpoa_disp_qos(struct seq_file *m)
225 {
226 struct atm_mpoa_qos *qos;
227
228 qos = qos_head;
229 seq_printf(m, "QoS entries for shortcuts:\n");
230 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");
231
232 while (qos != NULL) {
233 seq_printf(m, "%u.%u.%u.%u\n %-7d %-7d %-7d %-7d %-7d\n %-7d %-7d %-7d %-7d %-7d\n",
234 NIPQUAD(qos->ipaddr),
235 qos->qos.txtp.max_pcr, qos->qos.txtp.pcr, qos->qos.txtp.min_pcr, qos->qos.txtp.max_cdv, qos->qos.txtp.max_sdu,
236 qos->qos.rxtp.max_pcr, qos->qos.rxtp.pcr, qos->qos.rxtp.min_pcr, qos->qos.rxtp.max_cdv, qos->qos.rxtp.max_sdu);
237 qos = qos->next;
238 }
239 }
240
241 static struct net_device *find_lec_by_itfnum(int itf)
242 {
243 struct net_device *dev;
244 char name[IFNAMSIZ];
245
246 sprintf(name, "lec%d", itf);
247 dev = dev_get_by_name(name);
248
249 return dev;
250 }
251
252 static struct mpoa_client *alloc_mpc(void)
253 {
254 struct mpoa_client *mpc;
255
256 mpc = kzalloc(sizeof (struct mpoa_client), GFP_KERNEL);
257 if (mpc == NULL)
258 return NULL;
259 rwlock_init(&mpc->ingress_lock);
260 rwlock_init(&mpc->egress_lock);
261 mpc->next = mpcs;
262 atm_mpoa_init_cache(mpc);
263
264 mpc->parameters.mpc_p1 = MPC_P1;
265 mpc->parameters.mpc_p2 = MPC_P2;
266 memset(mpc->parameters.mpc_p3,0,sizeof(mpc->parameters.mpc_p3));
267 mpc->parameters.mpc_p4 = MPC_P4;
268 mpc->parameters.mpc_p5 = MPC_P5;
269 mpc->parameters.mpc_p6 = MPC_P6;
270
271 mpcs = mpc;
272
273 return mpc;
274 }
275
276 /*
277 *
278 * start_mpc() puts the MPC on line. All the packets destined
279 * to the lec underneath us are now being monitored and
280 * shortcuts will be established.
281 *
282 */
283 static void start_mpc(struct mpoa_client *mpc, struct net_device *dev)
284 {
285
286 dprintk("mpoa: (%s) start_mpc:\n", mpc->dev->name);
287 if (dev->hard_start_xmit == NULL) {
288 printk("mpoa: (%s) start_mpc: dev->hard_start_xmit == NULL, not starting\n",
289 dev->name);
290 return;
291 }
292 mpc->old_hard_start_xmit = dev->hard_start_xmit;
293 dev->hard_start_xmit = mpc_send_packet;
294
295 return;
296 }
297
298 static void stop_mpc(struct mpoa_client *mpc)
299 {
300
301 dprintk("mpoa: (%s) stop_mpc:", mpc->dev->name);
302
303 /* Lets not nullify lec device's dev->hard_start_xmit */
304 if (mpc->dev->hard_start_xmit != mpc_send_packet) {
305 dprintk(" mpc already stopped, not fatal\n");
306 return;
307 }
308 dprintk("\n");
309 mpc->dev->hard_start_xmit = mpc->old_hard_start_xmit;
310 mpc->old_hard_start_xmit = NULL;
311 /* close_shortcuts(mpc); ??? FIXME */
312
313 return;
314 }
315
316 static const char *mpoa_device_type_string(char type) __attribute__ ((unused));
317
318 static const char *mpoa_device_type_string(char type)
319 {
320 switch(type) {
321 case NON_MPOA:
322 return "non-MPOA device";
323 break;
324 case MPS:
325 return "MPS";
326 break;
327 case MPC:
328 return "MPC";
329 break;
330 case MPS_AND_MPC:
331 return "both MPS and MPC";
332 break;
333 default:
334 return "unspecified (non-MPOA) device";
335 break;
336 }
337
338 return ""; /* not reached */
339 }
340
341 /*
342 * lec device calls this via its dev->priv->lane2_ops->associate_indicator()
343 * when it sees a TLV in LE_ARP packet.
344 * We fill in the pointer above when we see a LANE2 lec initializing
345 * See LANE2 spec 3.1.5
346 *
347 * Quite a big and ugly function but when you look at it
348 * all it does is to try to locate and parse MPOA Device
349 * Type TLV.
350 * We give our lec a pointer to this function and when the
351 * lec sees a TLV it uses the pointer to call this function.
352 *
353 */
354 static void lane2_assoc_ind(struct net_device *dev, uint8_t *mac_addr,
355 uint8_t *tlvs, uint32_t sizeoftlvs)
356 {
357 uint32_t type;
358 uint8_t length, mpoa_device_type, number_of_mps_macs;
359 uint8_t *end_of_tlvs;
360 struct mpoa_client *mpc;
361
362 mpoa_device_type = number_of_mps_macs = 0; /* silence gcc */
363 dprintk("mpoa: (%s) lane2_assoc_ind: received TLV(s), ", dev->name);
364 dprintk("total length of all TLVs %d\n", sizeoftlvs);
365 mpc = find_mpc_by_lec(dev); /* Sampo-Fix: moved here from below */
366 if (mpc == NULL) {
367 printk("mpoa: (%s) lane2_assoc_ind: no mpc\n", dev->name);
368 return;
369 }
370 end_of_tlvs = tlvs + sizeoftlvs;
371 while (end_of_tlvs - tlvs >= 5) {
372 type = (tlvs[0] << 24) | (tlvs[1] << 16) | (tlvs[2] << 8) | tlvs[3];
373 length = tlvs[4];
374 tlvs += 5;
375 dprintk(" type 0x%x length %02x\n", type, length);
376 if (tlvs + length > end_of_tlvs) {
377 printk("TLV value extends past its buffer, aborting parse\n");
378 return;
379 }
380
381 if (type == 0) {
382 printk("mpoa: (%s) lane2_assoc_ind: TLV type was 0, returning\n", dev->name);
383 return;
384 }
385
386 if (type != TLV_MPOA_DEVICE_TYPE) {
387 tlvs += length;
388 continue; /* skip other TLVs */
389 }
390 mpoa_device_type = *tlvs++;
391 number_of_mps_macs = *tlvs++;
392 dprintk("mpoa: (%s) MPOA device type '%s', ", dev->name, mpoa_device_type_string(mpoa_device_type));
393 if (mpoa_device_type == MPS_AND_MPC &&
394 length < (42 + number_of_mps_macs*ETH_ALEN)) { /* :) */
395 printk("\nmpoa: (%s) lane2_assoc_ind: short MPOA Device Type TLV\n",
396 dev->name);
397 continue;
398 }
399 if ((mpoa_device_type == MPS || mpoa_device_type == MPC)
400 && length < 22 + number_of_mps_macs*ETH_ALEN) {
401 printk("\nmpoa: (%s) lane2_assoc_ind: short MPOA Device Type TLV\n",
402 dev->name);
403 continue;
404 }
405 if (mpoa_device_type != MPS && mpoa_device_type != MPS_AND_MPC) {
406 dprintk("ignoring non-MPS device\n");
407 if (mpoa_device_type == MPC) tlvs += 20;
408 continue; /* we are only interested in MPSs */
409 }
410 if (number_of_mps_macs == 0 && mpoa_device_type == MPS_AND_MPC) {
411 printk("\nmpoa: (%s) lane2_assoc_ind: MPS_AND_MPC has zero MACs\n", dev->name);
412 continue; /* someone should read the spec */
413 }
414 dprintk("this MPS has %d MAC addresses\n", number_of_mps_macs);
415
416 /* ok, now we can go and tell our daemon the control address of MPS */
417 send_set_mps_ctrl_addr(tlvs, mpc);
418
419 tlvs = copy_macs(mpc, mac_addr, tlvs, number_of_mps_macs, mpoa_device_type);
420 if (tlvs == NULL) return;
421 }
422 if (end_of_tlvs - tlvs != 0)
423 printk("mpoa: (%s) lane2_assoc_ind: ignoring %Zd bytes of trailing TLV carbage\n",
424 dev->name, end_of_tlvs - tlvs);
425 return;
426 }
427
428 /*
429 * Store at least advertizing router's MAC address
430 * plus the possible MAC address(es) to mpc->mps_macs.
431 * For a freshly allocated MPOA client mpc->mps_macs == 0.
432 */
433 static uint8_t *copy_macs(struct mpoa_client *mpc, uint8_t *router_mac,
434 uint8_t *tlvs, uint8_t mps_macs, uint8_t device_type)
435 {
436 int num_macs;
437 num_macs = (mps_macs > 1) ? mps_macs : 1;
438
439 if (mpc->number_of_mps_macs != num_macs) { /* need to reallocate? */
440 if (mpc->number_of_mps_macs != 0) kfree(mpc->mps_macs);
441 mpc->number_of_mps_macs = 0;
442 mpc->mps_macs = kmalloc(num_macs*ETH_ALEN, GFP_KERNEL);
443 if (mpc->mps_macs == NULL) {
444 printk("mpoa: (%s) copy_macs: out of mem\n", mpc->dev->name);
445 return NULL;
446 }
447 }
448 memcpy(mpc->mps_macs, router_mac, ETH_ALEN);
449 tlvs += 20; if (device_type == MPS_AND_MPC) tlvs += 20;
450 if (mps_macs > 0)
451 memcpy(mpc->mps_macs, tlvs, mps_macs*ETH_ALEN);
452 tlvs += mps_macs*ETH_ALEN;
453 mpc->number_of_mps_macs = num_macs;
454
455 return tlvs;
456 }
457
458 static int send_via_shortcut(struct sk_buff *skb, struct mpoa_client *mpc)
459 {
460 in_cache_entry *entry;
461 struct iphdr *iph;
462 char *buff;
463 __be32 ipaddr = 0;
464
465 static struct {
466 struct llc_snap_hdr hdr;
467 __be32 tag;
468 } tagged_llc_snap_hdr = {
469 {0xaa, 0xaa, 0x03, {0x00, 0x00, 0x00}, {0x88, 0x4c}},
470 0
471 };
472
473 buff = skb->data + mpc->dev->hard_header_len;
474 iph = (struct iphdr *)buff;
475 ipaddr = iph->daddr;
476
477 ddprintk("mpoa: (%s) send_via_shortcut: ipaddr 0x%x\n", mpc->dev->name, ipaddr);
478
479 entry = mpc->in_ops->get(ipaddr, mpc);
480 if (entry == NULL) {
481 entry = mpc->in_ops->add_entry(ipaddr, mpc);
482 if (entry != NULL) mpc->in_ops->put(entry);
483 return 1;
484 }
485 if (mpc->in_ops->cache_hit(entry, mpc) != OPEN){ /* threshold not exceeded or VCC not ready */
486 ddprintk("mpoa: (%s) send_via_shortcut: cache_hit: returns != OPEN\n", mpc->dev->name);
487 mpc->in_ops->put(entry);
488 return 1;
489 }
490
491 ddprintk("mpoa: (%s) send_via_shortcut: using shortcut\n", mpc->dev->name);
492 /* MPOA spec A.1.4, MPOA client must decrement IP ttl at least by one */
493 if (iph->ttl <= 1) {
494 ddprintk("mpoa: (%s) send_via_shortcut: IP ttl = %u, using LANE\n", mpc->dev->name, iph->ttl);
495 mpc->in_ops->put(entry);
496 return 1;
497 }
498 iph->ttl--;
499 iph->check = 0;
500 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
501
502 if (entry->ctrl_info.tag != 0) {
503 ddprintk("mpoa: (%s) send_via_shortcut: adding tag 0x%x\n", mpc->dev->name, entry->ctrl_info.tag);
504 tagged_llc_snap_hdr.tag = entry->ctrl_info.tag;
505 skb_pull(skb, ETH_HLEN); /* get rid of Eth header */
506 skb_push(skb, sizeof(tagged_llc_snap_hdr)); /* add LLC/SNAP header */
507 memcpy(skb->data, &tagged_llc_snap_hdr, sizeof(tagged_llc_snap_hdr));
508 } else {
509 skb_pull(skb, ETH_HLEN); /* get rid of Eth header */
510 skb_push(skb, sizeof(struct llc_snap_hdr)); /* add LLC/SNAP header + tag */
511 memcpy(skb->data, &llc_snap_mpoa_data, sizeof(struct llc_snap_hdr));
512 }
513
514 atomic_add(skb->truesize, &sk_atm(entry->shortcut)->sk_wmem_alloc);
515 ATM_SKB(skb)->atm_options = entry->shortcut->atm_options;
516 entry->shortcut->send(entry->shortcut, skb);
517 entry->packets_fwded++;
518 mpc->in_ops->put(entry);
519
520 return 0;
521 }
522
523 /*
524 * Probably needs some error checks and locking, not sure...
525 */
526 static int mpc_send_packet(struct sk_buff *skb, struct net_device *dev)
527 {
528 int retval;
529 struct mpoa_client *mpc;
530 struct ethhdr *eth;
531 int i = 0;
532
533 mpc = find_mpc_by_lec(dev); /* this should NEVER fail */
534 if(mpc == NULL) {
535 printk("mpoa: (%s) mpc_send_packet: no MPC found\n", dev->name);
536 goto non_ip;
537 }
538
539 eth = (struct ethhdr *)skb->data;
540 if (eth->h_proto != htons(ETH_P_IP))
541 goto non_ip; /* Multi-Protocol Over ATM :-) */
542
543 while (i < mpc->number_of_mps_macs) {
544 if (!compare_ether_addr(eth->h_dest, (mpc->mps_macs + i*ETH_ALEN)))
545 if ( send_via_shortcut(skb, mpc) == 0 ) /* try shortcut */
546 return 0; /* success! */
547 i++;
548 }
549
550 non_ip:
551 retval = mpc->old_hard_start_xmit(skb,dev);
552
553 return retval;
554 }
555
556 static int atm_mpoa_vcc_attach(struct atm_vcc *vcc, void __user *arg)
557 {
558 int bytes_left;
559 struct mpoa_client *mpc;
560 struct atmmpc_ioc ioc_data;
561 in_cache_entry *in_entry;
562 __be32 ipaddr;
563
564 bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmmpc_ioc));
565 if (bytes_left != 0) {
566 printk("mpoa: mpc_vcc_attach: Short read (missed %d bytes) from userland\n", bytes_left);
567 return -EFAULT;
568 }
569 ipaddr = ioc_data.ipaddr;
570 if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF)
571 return -EINVAL;
572
573 mpc = find_mpc_by_itfnum(ioc_data.dev_num);
574 if (mpc == NULL)
575 return -EINVAL;
576
577 if (ioc_data.type == MPC_SOCKET_INGRESS) {
578 in_entry = mpc->in_ops->get(ipaddr, mpc);
579 if (in_entry == NULL || in_entry->entry_state < INGRESS_RESOLVED) {
580 printk("mpoa: (%s) mpc_vcc_attach: did not find RESOLVED entry from ingress cache\n",
581 mpc->dev->name);
582 if (in_entry != NULL) mpc->in_ops->put(in_entry);
583 return -EINVAL;
584 }
585 printk("mpoa: (%s) mpc_vcc_attach: attaching ingress SVC, entry = %u.%u.%u.%u\n",
586 mpc->dev->name, NIPQUAD(in_entry->ctrl_info.in_dst_ip));
587 in_entry->shortcut = vcc;
588 mpc->in_ops->put(in_entry);
589 } else {
590 printk("mpoa: (%s) mpc_vcc_attach: attaching egress SVC\n", mpc->dev->name);
591 }
592
593 vcc->proto_data = mpc->dev;
594 vcc->push = mpc_push;
595
596 return 0;
597 }
598
599 /*
600 *
601 */
602 static void mpc_vcc_close(struct atm_vcc *vcc, struct net_device *dev)
603 {
604 struct mpoa_client *mpc;
605 in_cache_entry *in_entry;
606 eg_cache_entry *eg_entry;
607
608 mpc = find_mpc_by_lec(dev);
609 if (mpc == NULL) {
610 printk("mpoa: (%s) mpc_vcc_close: close for unknown MPC\n", dev->name);
611 return;
612 }
613
614 dprintk("mpoa: (%s) mpc_vcc_close:\n", dev->name);
615 in_entry = mpc->in_ops->get_by_vcc(vcc, mpc);
616 if (in_entry) {
617 dprintk("mpoa: (%s) mpc_vcc_close: ingress SVC closed ip = %u.%u.%u.%u\n",
618 mpc->dev->name, NIPQUAD(in_entry->ctrl_info.in_dst_ip));
619 in_entry->shortcut = NULL;
620 mpc->in_ops->put(in_entry);
621 }
622 eg_entry = mpc->eg_ops->get_by_vcc(vcc, mpc);
623 if (eg_entry) {
624 dprintk("mpoa: (%s) mpc_vcc_close: egress SVC closed\n", mpc->dev->name);
625 eg_entry->shortcut = NULL;
626 mpc->eg_ops->put(eg_entry);
627 }
628
629 if (in_entry == NULL && eg_entry == NULL)
630 dprintk("mpoa: (%s) mpc_vcc_close: unused vcc closed\n", dev->name);
631
632 return;
633 }
634
635 static void mpc_push(struct atm_vcc *vcc, struct sk_buff *skb)
636 {
637 struct net_device *dev = (struct net_device *)vcc->proto_data;
638 struct sk_buff *new_skb;
639 eg_cache_entry *eg;
640 struct mpoa_client *mpc;
641 __be32 tag;
642 char *tmp;
643
644 ddprintk("mpoa: (%s) mpc_push:\n", dev->name);
645 if (skb == NULL) {
646 dprintk("mpoa: (%s) mpc_push: null skb, closing VCC\n", dev->name);
647 mpc_vcc_close(vcc, dev);
648 return;
649 }
650
651 skb->dev = dev;
652 if (memcmp(skb->data, &llc_snap_mpoa_ctrl, sizeof(struct llc_snap_hdr)) == 0) {
653 struct sock *sk = sk_atm(vcc);
654
655 dprintk("mpoa: (%s) mpc_push: control packet arrived\n", dev->name);
656 /* Pass control packets to daemon */
657 skb_queue_tail(&sk->sk_receive_queue, skb);
658 sk->sk_data_ready(sk, skb->len);
659 return;
660 }
661
662 /* data coming over the shortcut */
663 atm_return(vcc, skb->truesize);
664
665 mpc = find_mpc_by_lec(dev);
666 if (mpc == NULL) {
667 printk("mpoa: (%s) mpc_push: unknown MPC\n", dev->name);
668 return;
669 }
670
671 if (memcmp(skb->data, &llc_snap_mpoa_data_tagged, sizeof(struct llc_snap_hdr)) == 0) { /* MPOA tagged data */
672 ddprintk("mpoa: (%s) mpc_push: tagged data packet arrived\n", dev->name);
673
674 } else if (memcmp(skb->data, &llc_snap_mpoa_data, sizeof(struct llc_snap_hdr)) == 0) { /* MPOA data */
675 printk("mpoa: (%s) mpc_push: non-tagged data packet arrived\n", dev->name);
676 printk(" mpc_push: non-tagged data unsupported, purging\n");
677 dev_kfree_skb_any(skb);
678 return;
679 } else {
680 printk("mpoa: (%s) mpc_push: garbage arrived, purging\n", dev->name);
681 dev_kfree_skb_any(skb);
682 return;
683 }
684
685 tmp = skb->data + sizeof(struct llc_snap_hdr);
686 tag = *(__be32 *)tmp;
687
688 eg = mpc->eg_ops->get_by_tag(tag, mpc);
689 if (eg == NULL) {
690 printk("mpoa: (%s) mpc_push: Didn't find egress cache entry, tag = %u\n",
691 dev->name,tag);
692 purge_egress_shortcut(vcc, NULL);
693 dev_kfree_skb_any(skb);
694 return;
695 }
696
697 /*
698 * See if ingress MPC is using shortcut we opened as a return channel.
699 * This means we have a bi-directional vcc opened by us.
700 */
701 if (eg->shortcut == NULL) {
702 eg->shortcut = vcc;
703 printk("mpoa: (%s) mpc_push: egress SVC in use\n", dev->name);
704 }
705
706 skb_pull(skb, sizeof(struct llc_snap_hdr) + sizeof(tag)); /* get rid of LLC/SNAP header */
707 new_skb = skb_realloc_headroom(skb, eg->ctrl_info.DH_length); /* LLC/SNAP is shorter than MAC header :( */
708 dev_kfree_skb_any(skb);
709 if (new_skb == NULL){
710 mpc->eg_ops->put(eg);
711 return;
712 }
713 skb_push(new_skb, eg->ctrl_info.DH_length); /* add MAC header */
714 memcpy(new_skb->data, eg->ctrl_info.DLL_header, eg->ctrl_info.DH_length);
715 new_skb->protocol = eth_type_trans(new_skb, dev);
716 new_skb->nh.raw = new_skb->data;
717
718 eg->latest_ip_addr = new_skb->nh.iph->saddr;
719 eg->packets_rcvd++;
720 mpc->eg_ops->put(eg);
721
722 memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
723 netif_rx(new_skb);
724
725 return;
726 }
727
728 static struct atmdev_ops mpc_ops = { /* only send is required */
729 .close = mpoad_close,
730 .send = msg_from_mpoad
731 };
732
733 static struct atm_dev mpc_dev = {
734 .ops = &mpc_ops,
735 .type = "mpc",
736 .number = 42,
737 .lock = SPIN_LOCK_UNLOCKED
738 /* members not explicitly initialised will be 0 */
739 };
740
741 static int atm_mpoa_mpoad_attach (struct atm_vcc *vcc, int arg)
742 {
743 struct mpoa_client *mpc;
744 struct lec_priv *priv;
745 int err;
746
747 if (mpcs == NULL) {
748 init_timer(&mpc_timer);
749 mpc_timer_refresh();
750
751 /* This lets us now how our LECs are doing */
752 err = register_netdevice_notifier(&mpoa_notifier);
753 if (err < 0) {
754 del_timer(&mpc_timer);
755 return err;
756 }
757 }
758
759 mpc = find_mpc_by_itfnum(arg);
760 if (mpc == NULL) {
761 dprintk("mpoa: mpoad_attach: allocating new mpc for itf %d\n", arg);
762 mpc = alloc_mpc();
763 if (mpc == NULL)
764 return -ENOMEM;
765 mpc->dev_num = arg;
766 mpc->dev = find_lec_by_itfnum(arg); /* NULL if there was no lec */
767 }
768 if (mpc->mpoad_vcc) {
769 printk("mpoa: mpoad_attach: mpoad is already present for itf %d\n", arg);
770 return -EADDRINUSE;
771 }
772
773 if (mpc->dev) { /* check if the lec is LANE2 capable */
774 priv = (struct lec_priv *)mpc->dev->priv;
775 if (priv->lane_version < 2) {
776 dev_put(mpc->dev);
777 mpc->dev = NULL;
778 } else
779 priv->lane2_ops->associate_indicator = lane2_assoc_ind;
780 }
781
782 mpc->mpoad_vcc = vcc;
783 vcc->dev = &mpc_dev;
784 vcc_insert_socket(sk_atm(vcc));
785 set_bit(ATM_VF_META,&vcc->flags);
786 set_bit(ATM_VF_READY,&vcc->flags);
787
788 if (mpc->dev) {
789 char empty[ATM_ESA_LEN];
790 memset(empty, 0, ATM_ESA_LEN);
791
792 start_mpc(mpc, mpc->dev);
793 /* set address if mpcd e.g. gets killed and restarted.
794 * If we do not do it now we have to wait for the next LE_ARP
795 */
796 if ( memcmp(mpc->mps_ctrl_addr, empty, ATM_ESA_LEN) != 0 )
797 send_set_mps_ctrl_addr(mpc->mps_ctrl_addr, mpc);
798 }
799
800 __module_get(THIS_MODULE);
801 return arg;
802 }
803
804 static void send_set_mps_ctrl_addr(char *addr, struct mpoa_client *mpc)
805 {
806 struct k_message mesg;
807
808 memcpy (mpc->mps_ctrl_addr, addr, ATM_ESA_LEN);
809
810 mesg.type = SET_MPS_CTRL_ADDR;
811 memcpy(mesg.MPS_ctrl, addr, ATM_ESA_LEN);
812 msg_to_mpoad(&mesg, mpc);
813
814 return;
815 }
816
817 static void mpoad_close(struct atm_vcc *vcc)
818 {
819 struct mpoa_client *mpc;
820 struct sk_buff *skb;
821
822 mpc = find_mpc_by_vcc(vcc);
823 if (mpc == NULL) {
824 printk("mpoa: mpoad_close: did not find MPC\n");
825 return;
826 }
827 if (!mpc->mpoad_vcc) {
828 printk("mpoa: mpoad_close: close for non-present mpoad\n");
829 return;
830 }
831
832 mpc->mpoad_vcc = NULL;
833 if (mpc->dev) {
834 struct lec_priv *priv = (struct lec_priv *)mpc->dev->priv;
835 priv->lane2_ops->associate_indicator = NULL;
836 stop_mpc(mpc);
837 dev_put(mpc->dev);
838 }
839
840 mpc->in_ops->destroy_cache(mpc);
841 mpc->eg_ops->destroy_cache(mpc);
842
843 while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue))) {
844 atm_return(vcc, skb->truesize);
845 kfree_skb(skb);
846 }
847
848 printk("mpoa: (%s) going down\n",
849 (mpc->dev) ? mpc->dev->name : "<unknown>");
850 module_put(THIS_MODULE);
851
852 return;
853 }
854
855 /*
856 *
857 */
858 static int msg_from_mpoad(struct atm_vcc *vcc, struct sk_buff *skb)
859 {
860
861 struct mpoa_client *mpc = find_mpc_by_vcc(vcc);
862 struct k_message *mesg = (struct k_message*)skb->data;
863 atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
864
865 if (mpc == NULL) {
866 printk("mpoa: msg_from_mpoad: no mpc found\n");
867 return 0;
868 }
869 dprintk("mpoa: (%s) msg_from_mpoad:", (mpc->dev) ? mpc->dev->name : "<unknown>");
870 switch(mesg->type) {
871 case MPOA_RES_REPLY_RCVD:
872 dprintk(" mpoa_res_reply_rcvd\n");
873 MPOA_res_reply_rcvd(mesg, mpc);
874 break;
875 case MPOA_TRIGGER_RCVD:
876 dprintk(" mpoa_trigger_rcvd\n");
877 MPOA_trigger_rcvd(mesg, mpc);
878 break;
879 case INGRESS_PURGE_RCVD:
880 dprintk(" nhrp_purge_rcvd\n");
881 ingress_purge_rcvd(mesg, mpc);
882 break;
883 case EGRESS_PURGE_RCVD:
884 dprintk(" egress_purge_reply_rcvd\n");
885 egress_purge_rcvd(mesg, mpc);
886 break;
887 case MPS_DEATH:
888 dprintk(" mps_death\n");
889 mps_death(mesg, mpc);
890 break;
891 case CACHE_IMPOS_RCVD:
892 dprintk(" cache_impos_rcvd\n");
893 MPOA_cache_impos_rcvd(mesg, mpc);
894 break;
895 case SET_MPC_CTRL_ADDR:
896 dprintk(" set_mpc_ctrl_addr\n");
897 set_mpc_ctrl_addr_rcvd(mesg, mpc);
898 break;
899 case SET_MPS_MAC_ADDR:
900 dprintk(" set_mps_mac_addr\n");
901 set_mps_mac_addr_rcvd(mesg, mpc);
902 break;
903 case CLEAN_UP_AND_EXIT:
904 dprintk(" clean_up_and_exit\n");
905 clean_up(mesg, mpc, DIE);
906 break;
907 case RELOAD:
908 dprintk(" reload\n");
909 clean_up(mesg, mpc, RELOAD);
910 break;
911 case SET_MPC_PARAMS:
912 dprintk(" set_mpc_params\n");
913 mpc->parameters = mesg->content.params;
914 break;
915 default:
916 dprintk(" unknown message %d\n", mesg->type);
917 break;
918 }
919 kfree_skb(skb);
920
921 return 0;
922 }
923
924 /* Remember that this function may not do things that sleep */
925 int msg_to_mpoad(struct k_message *mesg, struct mpoa_client *mpc)
926 {
927 struct sk_buff *skb;
928 struct sock *sk;
929
930 if (mpc == NULL || !mpc->mpoad_vcc) {
931 printk("mpoa: msg_to_mpoad: mesg %d to a non-existent mpoad\n", mesg->type);
932 return -ENXIO;
933 }
934
935 skb = alloc_skb(sizeof(struct k_message), GFP_ATOMIC);
936 if (skb == NULL)
937 return -ENOMEM;
938 skb_put(skb, sizeof(struct k_message));
939 memcpy(skb->data, mesg, sizeof(struct k_message));
940 atm_force_charge(mpc->mpoad_vcc, skb->truesize);
941
942 sk = sk_atm(mpc->mpoad_vcc);
943 skb_queue_tail(&sk->sk_receive_queue, skb);
944 sk->sk_data_ready(sk, skb->len);
945
946 return 0;
947 }
948
949 static int mpoa_event_listener(struct notifier_block *mpoa_notifier, unsigned long event, void *dev_ptr)
950 {
951 struct net_device *dev;
952 struct mpoa_client *mpc;
953 struct lec_priv *priv;
954
955 dev = (struct net_device *)dev_ptr;
956 if (dev->name == NULL || strncmp(dev->name, "lec", 3))
957 return NOTIFY_DONE; /* we are only interested in lec:s */
958
959 switch (event) {
960 case NETDEV_REGISTER: /* a new lec device was allocated */
961 priv = (struct lec_priv *)dev->priv;
962 if (priv->lane_version < 2)
963 break;
964 priv->lane2_ops->associate_indicator = lane2_assoc_ind;
965 mpc = find_mpc_by_itfnum(priv->itfnum);
966 if (mpc == NULL) {
967 dprintk("mpoa: mpoa_event_listener: allocating new mpc for %s\n",
968 dev->name);
969 mpc = alloc_mpc();
970 if (mpc == NULL) {
971 printk("mpoa: mpoa_event_listener: no new mpc");
972 break;
973 }
974 }
975 mpc->dev_num = priv->itfnum;
976 mpc->dev = dev;
977 dev_hold(dev);
978 dprintk("mpoa: (%s) was initialized\n", dev->name);
979 break;
980 case NETDEV_UNREGISTER:
981 /* the lec device was deallocated */
982 mpc = find_mpc_by_lec(dev);
983 if (mpc == NULL)
984 break;
985 dprintk("mpoa: device (%s) was deallocated\n", dev->name);
986 stop_mpc(mpc);
987 dev_put(mpc->dev);
988 mpc->dev = NULL;
989 break;
990 case NETDEV_UP:
991 /* the dev was ifconfig'ed up */
992 mpc = find_mpc_by_lec(dev);
993 if (mpc == NULL)
994 break;
995 if (mpc->mpoad_vcc != NULL) {
996 start_mpc(mpc, dev);
997 }
998 break;
999 case NETDEV_DOWN:
1000 /* the dev was ifconfig'ed down */
1001 /* this means that the flow of packets from the
1002 * upper layer stops
1003 */
1004 mpc = find_mpc_by_lec(dev);
1005 if (mpc == NULL)
1006 break;
1007 if (mpc->mpoad_vcc != NULL) {
1008 stop_mpc(mpc);
1009 }
1010 break;
1011 case NETDEV_REBOOT:
1012 case NETDEV_CHANGE:
1013 case NETDEV_CHANGEMTU:
1014 case NETDEV_CHANGEADDR:
1015 case NETDEV_GOING_DOWN:
1016 break;
1017 default:
1018 break;
1019 }
1020
1021 return NOTIFY_DONE;
1022 }
1023
1024 /*
1025 * Functions which are called after a message is received from mpcd.
1026 * Msg is reused on purpose.
1027 */
1028
1029
1030 static void MPOA_trigger_rcvd(struct k_message *msg, struct mpoa_client *mpc)
1031 {
1032 __be32 dst_ip = msg->content.in_info.in_dst_ip;
1033 in_cache_entry *entry;
1034
1035 entry = mpc->in_ops->get(dst_ip, mpc);
1036 if(entry == NULL){
1037 entry = mpc->in_ops->add_entry(dst_ip, mpc);
1038 entry->entry_state = INGRESS_RESOLVING;
1039 msg->type = SND_MPOA_RES_RQST;
1040 msg->content.in_info = entry->ctrl_info;
1041 msg_to_mpoad(msg, mpc);
1042 do_gettimeofday(&(entry->reply_wait));
1043 mpc->in_ops->put(entry);
1044 return;
1045 }
1046
1047 if(entry->entry_state == INGRESS_INVALID){
1048 entry->entry_state = INGRESS_RESOLVING;
1049 msg->type = SND_MPOA_RES_RQST;
1050 msg->content.in_info = entry->ctrl_info;
1051 msg_to_mpoad(msg, mpc);
1052 do_gettimeofday(&(entry->reply_wait));
1053 mpc->in_ops->put(entry);
1054 return;
1055 }
1056
1057 printk("mpoa: (%s) MPOA_trigger_rcvd: entry already in resolving state\n",
1058 (mpc->dev) ? mpc->dev->name : "<unknown>");
1059 mpc->in_ops->put(entry);
1060 return;
1061 }
1062
1063 /*
1064 * Things get complicated because we have to check if there's an egress
1065 * shortcut with suitable traffic parameters we could use.
1066 */
1067 static void check_qos_and_open_shortcut(struct k_message *msg, struct mpoa_client *client, in_cache_entry *entry)
1068 {
1069 __be32 dst_ip = msg->content.in_info.in_dst_ip;
1070 struct atm_mpoa_qos *qos = atm_mpoa_search_qos(dst_ip);
1071 eg_cache_entry *eg_entry = client->eg_ops->get_by_src_ip(dst_ip, client);
1072
1073 if(eg_entry && eg_entry->shortcut){
1074 if(eg_entry->shortcut->qos.txtp.traffic_class &
1075 msg->qos.txtp.traffic_class &
1076 (qos ? qos->qos.txtp.traffic_class : ATM_UBR | ATM_CBR)){
1077 if(eg_entry->shortcut->qos.txtp.traffic_class == ATM_UBR)
1078 entry->shortcut = eg_entry->shortcut;
1079 else if(eg_entry->shortcut->qos.txtp.max_pcr > 0)
1080 entry->shortcut = eg_entry->shortcut;
1081 }
1082 if(entry->shortcut){
1083 dprintk("mpoa: (%s) using egress SVC to reach %u.%u.%u.%u\n",client->dev->name, NIPQUAD(dst_ip));
1084 client->eg_ops->put(eg_entry);
1085 return;
1086 }
1087 }
1088 if (eg_entry != NULL)
1089 client->eg_ops->put(eg_entry);
1090
1091 /* No luck in the egress cache we must open an ingress SVC */
1092 msg->type = OPEN_INGRESS_SVC;
1093 if (qos && (qos->qos.txtp.traffic_class == msg->qos.txtp.traffic_class))
1094 {
1095 msg->qos = qos->qos;
1096 printk("mpoa: (%s) trying to get a CBR shortcut\n",client->dev->name);
1097 }
1098 else memset(&msg->qos,0,sizeof(struct atm_qos));
1099 msg_to_mpoad(msg, client);
1100 return;
1101 }
1102
1103 static void MPOA_res_reply_rcvd(struct k_message *msg, struct mpoa_client *mpc)
1104 {
1105 __be32 dst_ip = msg->content.in_info.in_dst_ip;
1106 in_cache_entry *entry = mpc->in_ops->get(dst_ip, mpc);
1107
1108 dprintk("mpoa: (%s) MPOA_res_reply_rcvd: ip %u.%u.%u.%u\n", mpc->dev->name, NIPQUAD(dst_ip));
1109 ddprintk("mpoa: (%s) MPOA_res_reply_rcvd() entry = %p", mpc->dev->name, entry);
1110 if(entry == NULL){
1111 printk("\nmpoa: (%s) ARGH, received res. reply for an entry that doesn't exist.\n", mpc->dev->name);
1112 return;
1113 }
1114 ddprintk(" entry_state = %d ", entry->entry_state);
1115
1116 if (entry->entry_state == INGRESS_RESOLVED) {
1117 printk("\nmpoa: (%s) MPOA_res_reply_rcvd for RESOLVED entry!\n", mpc->dev->name);
1118 mpc->in_ops->put(entry);
1119 return;
1120 }
1121
1122 entry->ctrl_info = msg->content.in_info;
1123 do_gettimeofday(&(entry->tv));
1124 do_gettimeofday(&(entry->reply_wait)); /* Used in refreshing func from now on */
1125 entry->refresh_time = 0;
1126 ddprintk("entry->shortcut = %p\n", entry->shortcut);
1127
1128 if(entry->entry_state == INGRESS_RESOLVING && entry->shortcut != NULL){
1129 entry->entry_state = INGRESS_RESOLVED;
1130 mpc->in_ops->put(entry);
1131 return; /* Shortcut already open... */
1132 }
1133
1134 if (entry->shortcut != NULL) {
1135 printk("mpoa: (%s) MPOA_res_reply_rcvd: entry->shortcut != NULL, impossible!\n",
1136 mpc->dev->name);
1137 mpc->in_ops->put(entry);
1138 return;
1139 }
1140
1141 check_qos_and_open_shortcut(msg, mpc, entry);
1142 entry->entry_state = INGRESS_RESOLVED;
1143 mpc->in_ops->put(entry);
1144
1145 return;
1146
1147 }
1148
1149 static void ingress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc)
1150 {
1151 __be32 dst_ip = msg->content.in_info.in_dst_ip;
1152 __be32 mask = msg->ip_mask;
1153 in_cache_entry *entry = mpc->in_ops->get_with_mask(dst_ip, mpc, mask);
1154
1155 if(entry == NULL){
1156 printk("mpoa: (%s) ingress_purge_rcvd: purge for a non-existing entry, ", mpc->dev->name);
1157 printk("ip = %u.%u.%u.%u\n", NIPQUAD(dst_ip));
1158 return;
1159 }
1160
1161 do {
1162 dprintk("mpoa: (%s) ingress_purge_rcvd: removing an ingress entry, ip = %u.%u.%u.%u\n" ,
1163 mpc->dev->name, NIPQUAD(dst_ip));
1164 write_lock_bh(&mpc->ingress_lock);
1165 mpc->in_ops->remove_entry(entry, mpc);
1166 write_unlock_bh(&mpc->ingress_lock);
1167 mpc->in_ops->put(entry);
1168 entry = mpc->in_ops->get_with_mask(dst_ip, mpc, mask);
1169 } while (entry != NULL);
1170
1171 return;
1172 }
1173
1174 static void egress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc)
1175 {
1176 __be32 cache_id = msg->content.eg_info.cache_id;
1177 eg_cache_entry *entry = mpc->eg_ops->get_by_cache_id(cache_id, mpc);
1178
1179 if (entry == NULL) {
1180 dprintk("mpoa: (%s) egress_purge_rcvd: purge for a non-existing entry\n", mpc->dev->name);
1181 return;
1182 }
1183
1184 write_lock_irq(&mpc->egress_lock);
1185 mpc->eg_ops->remove_entry(entry, mpc);
1186 write_unlock_irq(&mpc->egress_lock);
1187
1188 mpc->eg_ops->put(entry);
1189
1190 return;
1191 }
1192
1193 static void purge_egress_shortcut(struct atm_vcc *vcc, eg_cache_entry *entry)
1194 {
1195 struct sock *sk;
1196 struct k_message *purge_msg;
1197 struct sk_buff *skb;
1198
1199 dprintk("mpoa: purge_egress_shortcut: entering\n");
1200 if (vcc == NULL) {
1201 printk("mpoa: purge_egress_shortcut: vcc == NULL\n");
1202 return;
1203 }
1204
1205 skb = alloc_skb(sizeof(struct k_message), GFP_ATOMIC);
1206 if (skb == NULL) {
1207 printk("mpoa: purge_egress_shortcut: out of memory\n");
1208 return;
1209 }
1210
1211 skb_put(skb, sizeof(struct k_message));
1212 memset(skb->data, 0, sizeof(struct k_message));
1213 purge_msg = (struct k_message *)skb->data;
1214 purge_msg->type = DATA_PLANE_PURGE;
1215 if (entry != NULL)
1216 purge_msg->content.eg_info = entry->ctrl_info;
1217
1218 atm_force_charge(vcc, skb->truesize);
1219
1220 sk = sk_atm(vcc);
1221 skb_queue_tail(&sk->sk_receive_queue, skb);
1222 sk->sk_data_ready(sk, skb->len);
1223 dprintk("mpoa: purge_egress_shortcut: exiting:\n");
1224
1225 return;
1226 }
1227
1228 /*
1229 * Our MPS died. Tell our daemon to send NHRP data plane purge to each
1230 * of the egress shortcuts we have.
1231 */
1232 static void mps_death( struct k_message * msg, struct mpoa_client * mpc )
1233 {
1234 eg_cache_entry *entry;
1235
1236 dprintk("mpoa: (%s) mps_death:\n", mpc->dev->name);
1237
1238 if(memcmp(msg->MPS_ctrl, mpc->mps_ctrl_addr, ATM_ESA_LEN)){
1239 printk("mpoa: (%s) mps_death: wrong MPS\n", mpc->dev->name);
1240 return;
1241 }
1242
1243 /* FIXME: This knows too much of the cache structure */
1244 read_lock_irq(&mpc->egress_lock);
1245 entry = mpc->eg_cache;
1246 while (entry != NULL) {
1247 purge_egress_shortcut(entry->shortcut, entry);
1248 entry = entry->next;
1249 }
1250 read_unlock_irq(&mpc->egress_lock);
1251
1252 mpc->in_ops->destroy_cache(mpc);
1253 mpc->eg_ops->destroy_cache(mpc);
1254
1255 return;
1256 }
1257
1258 static void MPOA_cache_impos_rcvd( struct k_message * msg, struct mpoa_client * mpc)
1259 {
1260 uint16_t holding_time;
1261 eg_cache_entry *entry = mpc->eg_ops->get_by_cache_id(msg->content.eg_info.cache_id, mpc);
1262
1263 holding_time = msg->content.eg_info.holding_time;
1264 dprintk("mpoa: (%s) MPOA_cache_impos_rcvd: entry = %p, holding_time = %u\n",
1265 mpc->dev->name, entry, holding_time);
1266 if(entry == NULL && holding_time) {
1267 entry = mpc->eg_ops->add_entry(msg, mpc);
1268 mpc->eg_ops->put(entry);
1269 return;
1270 }
1271 if(holding_time){
1272 mpc->eg_ops->update(entry, holding_time);
1273 return;
1274 }
1275
1276 write_lock_irq(&mpc->egress_lock);
1277 mpc->eg_ops->remove_entry(entry, mpc);
1278 write_unlock_irq(&mpc->egress_lock);
1279
1280 mpc->eg_ops->put(entry);
1281
1282 return;
1283 }
1284
1285 static void set_mpc_ctrl_addr_rcvd(struct k_message *mesg, struct mpoa_client *mpc)
1286 {
1287 struct lec_priv *priv;
1288 int i, retval ;
1289
1290 uint8_t tlv[4 + 1 + 1 + 1 + ATM_ESA_LEN];
1291
1292 tlv[0] = 00; tlv[1] = 0xa0; tlv[2] = 0x3e; tlv[3] = 0x2a; /* type */
1293 tlv[4] = 1 + 1 + ATM_ESA_LEN; /* length */
1294 tlv[5] = 0x02; /* MPOA client */
1295 tlv[6] = 0x00; /* number of MPS MAC addresses */
1296
1297 memcpy(&tlv[7], mesg->MPS_ctrl, ATM_ESA_LEN); /* MPC ctrl ATM addr */
1298 memcpy(mpc->our_ctrl_addr, mesg->MPS_ctrl, ATM_ESA_LEN);
1299
1300 dprintk("mpoa: (%s) setting MPC ctrl ATM address to ",
1301 (mpc->dev) ? mpc->dev->name : "<unknown>");
1302 for (i = 7; i < sizeof(tlv); i++)
1303 dprintk("%02x ", tlv[i]);
1304 dprintk("\n");
1305
1306 if (mpc->dev) {
1307 priv = (struct lec_priv *)mpc->dev->priv;
1308 retval = priv->lane2_ops->associate_req(mpc->dev, mpc->dev->dev_addr, tlv, sizeof(tlv));
1309 if (retval == 0)
1310 printk("mpoa: (%s) MPOA device type TLV association failed\n", mpc->dev->name);
1311 retval = priv->lane2_ops->resolve(mpc->dev, NULL, 1, NULL, NULL);
1312 if (retval < 0)
1313 printk("mpoa: (%s) targetless LE_ARP request failed\n", mpc->dev->name);
1314 }
1315
1316 return;
1317 }
1318
1319 static void set_mps_mac_addr_rcvd(struct k_message *msg, struct mpoa_client *client)
1320 {
1321
1322 if(client->number_of_mps_macs)
1323 kfree(client->mps_macs);
1324 client->number_of_mps_macs = 0;
1325 client->mps_macs = kmemdup(msg->MPS_ctrl, ETH_ALEN, GFP_KERNEL);
1326 if (client->mps_macs == NULL) {
1327 printk("mpoa: set_mps_mac_addr_rcvd: out of memory\n");
1328 return;
1329 }
1330 client->number_of_mps_macs = 1;
1331
1332 return;
1333 }
1334
1335 /*
1336 * purge egress cache and tell daemon to 'action' (DIE, RELOAD)
1337 */
1338 static void clean_up(struct k_message *msg, struct mpoa_client *mpc, int action)
1339 {
1340
1341 eg_cache_entry *entry;
1342 msg->type = SND_EGRESS_PURGE;
1343
1344
1345 /* FIXME: This knows too much of the cache structure */
1346 read_lock_irq(&mpc->egress_lock);
1347 entry = mpc->eg_cache;
1348 while (entry != NULL){
1349 msg->content.eg_info = entry->ctrl_info;
1350 dprintk("mpoa: cache_id %u\n", entry->ctrl_info.cache_id);
1351 msg_to_mpoad(msg, mpc);
1352 entry = entry->next;
1353 }
1354 read_unlock_irq(&mpc->egress_lock);
1355
1356 msg->type = action;
1357 msg_to_mpoad(msg, mpc);
1358 return;
1359 }
1360
1361 static void mpc_timer_refresh(void)
1362 {
1363 mpc_timer.expires = jiffies + (MPC_P2 * HZ);
1364 mpc_timer.data = mpc_timer.expires;
1365 mpc_timer.function = mpc_cache_check;
1366 add_timer(&mpc_timer);
1367
1368 return;
1369 }
1370
1371 static void mpc_cache_check( unsigned long checking_time )
1372 {
1373 struct mpoa_client *mpc = mpcs;
1374 static unsigned long previous_resolving_check_time;
1375 static unsigned long previous_refresh_time;
1376
1377 while( mpc != NULL ){
1378 mpc->in_ops->clear_count(mpc);
1379 mpc->eg_ops->clear_expired(mpc);
1380 if(checking_time - previous_resolving_check_time > mpc->parameters.mpc_p4 * HZ ){
1381 mpc->in_ops->check_resolving(mpc);
1382 previous_resolving_check_time = checking_time;
1383 }
1384 if(checking_time - previous_refresh_time > mpc->parameters.mpc_p5 * HZ ){
1385 mpc->in_ops->refresh(mpc);
1386 previous_refresh_time = checking_time;
1387 }
1388 mpc = mpc->next;
1389 }
1390 mpc_timer_refresh();
1391
1392 return;
1393 }
1394
1395 static int atm_mpoa_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1396 {
1397 int err = 0;
1398 struct atm_vcc *vcc = ATM_SD(sock);
1399
1400 if (cmd != ATMMPC_CTRL && cmd != ATMMPC_DATA)
1401 return -ENOIOCTLCMD;
1402
1403 if (!capable(CAP_NET_ADMIN))
1404 return -EPERM;
1405
1406 switch (cmd) {
1407 case ATMMPC_CTRL:
1408 err = atm_mpoa_mpoad_attach(vcc, (int)arg);
1409 if (err >= 0)
1410 sock->state = SS_CONNECTED;
1411 break;
1412 case ATMMPC_DATA:
1413 err = atm_mpoa_vcc_attach(vcc, (void __user *)arg);
1414 break;
1415 default:
1416 break;
1417 }
1418 return err;
1419 }
1420
1421
1422 static struct atm_ioctl atm_ioctl_ops = {
1423 .owner = THIS_MODULE,
1424 .ioctl = atm_mpoa_ioctl,
1425 };
1426
1427 static __init int atm_mpoa_init(void)
1428 {
1429 register_atm_ioctl(&atm_ioctl_ops);
1430
1431 if (mpc_proc_init() != 0)
1432 printk(KERN_INFO "mpoa: failed to initialize /proc/mpoa\n");
1433
1434 printk("mpc.c: " __DATE__ " " __TIME__ " initialized\n");
1435
1436 return 0;
1437 }
1438
1439 static void __exit atm_mpoa_cleanup(void)
1440 {
1441 struct mpoa_client *mpc, *tmp;
1442 struct atm_mpoa_qos *qos, *nextqos;
1443 struct lec_priv *priv;
1444
1445 mpc_proc_clean();
1446
1447 del_timer(&mpc_timer);
1448 unregister_netdevice_notifier(&mpoa_notifier);
1449 deregister_atm_ioctl(&atm_ioctl_ops);
1450
1451 mpc = mpcs;
1452 mpcs = NULL;
1453 while (mpc != NULL) {
1454 tmp = mpc->next;
1455 if (mpc->dev != NULL) {
1456 stop_mpc(mpc);
1457 priv = (struct lec_priv *)mpc->dev->priv;
1458 if (priv->lane2_ops != NULL)
1459 priv->lane2_ops->associate_indicator = NULL;
1460 }
1461 ddprintk("mpoa: cleanup_module: about to clear caches\n");
1462 mpc->in_ops->destroy_cache(mpc);
1463 mpc->eg_ops->destroy_cache(mpc);
1464 ddprintk("mpoa: cleanup_module: caches cleared\n");
1465 kfree(mpc->mps_macs);
1466 memset(mpc, 0, sizeof(struct mpoa_client));
1467 ddprintk("mpoa: cleanup_module: about to kfree %p\n", mpc);
1468 kfree(mpc);
1469 ddprintk("mpoa: cleanup_module: next mpc is at %p\n", tmp);
1470 mpc = tmp;
1471 }
1472
1473 qos = qos_head;
1474 qos_head = NULL;
1475 while (qos != NULL) {
1476 nextqos = qos->next;
1477 dprintk("mpoa: cleanup_module: freeing qos entry %p\n", qos);
1478 kfree(qos);
1479 qos = nextqos;
1480 }
1481
1482 return;
1483 }
1484
1485 module_init(atm_mpoa_init);
1486 module_exit(atm_mpoa_cleanup);
1487
1488 MODULE_LICENSE("GPL");
linux v2.6.22.y-op