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1 | /* |
2 | * lec.c: Lan Emulation driver |
3 | * |
4 | * Marko Kiiskila <mkiiskila@yahoo.com> |
5 | */ |
6 | |
7 | #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__ |
8 | |
9 | #include <linux/slab.h> |
10 | #include <linux/kernel.h> |
11 | #include <linux/bitops.h> |
12 | #include <linux/capability.h> |
13 | |
14 | /* We are ethernet device */ |
15 | #include <linux/if_ether.h> |
16 | #include <linux/netdevice.h> |
17 | #include <linux/etherdevice.h> |
18 | #include <net/sock.h> |
19 | #include <linux/skbuff.h> |
20 | #include <linux/ip.h> |
21 | #include <asm/byteorder.h> |
22 | #include <linux/uaccess.h> |
23 | #include <net/arp.h> |
24 | #include <net/dst.h> |
25 | #include <linux/proc_fs.h> |
26 | #include <linux/spinlock.h> |
27 | #include <linux/seq_file.h> |
28 | |
29 | /* And atm device */ |
30 | #include <linux/atmdev.h> |
31 | #include <linux/atmlec.h> |
32 | |
33 | /* Proxy LEC knows about bridging */ |
34 | #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) |
35 | #include "../bridge/br_private.h" |
36 | |
37 | static unsigned char bridge_ula_lec[] = { 0x01, 0x80, 0xc2, 0x00, 0x00 }; |
38 | #endif |
39 | |
40 | /* Modular too */ |
41 | #include <linux/module.h> |
42 | #include <linux/init.h> |
43 | |
44 | #include "lec.h" |
45 | #include "lec_arpc.h" |
46 | #include "resources.h" |
47 | |
48 | #define DUMP_PACKETS 0 /* |
49 | * 0 = None, |
50 | * 1 = 30 first bytes |
51 | * 2 = Whole packet |
52 | */ |
53 | |
54 | #define LEC_UNRES_QUE_LEN 8 /* |
55 | * number of tx packets to queue for a |
56 | * single destination while waiting for SVC |
57 | */ |
58 | |
59 | static int lec_open(struct net_device *dev); |
60 | static netdev_tx_t lec_start_xmit(struct sk_buff *skb, |
61 | struct net_device *dev); |
62 | static int lec_close(struct net_device *dev); |
63 | static struct lec_arp_table *lec_arp_find(struct lec_priv *priv, |
64 | const unsigned char *mac_addr); |
65 | static int lec_arp_remove(struct lec_priv *priv, |
66 | struct lec_arp_table *to_remove); |
67 | /* LANE2 functions */ |
68 | static void lane2_associate_ind(struct net_device *dev, const u8 *mac_address, |
69 | const u8 *tlvs, u32 sizeoftlvs); |
70 | static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force, |
71 | u8 **tlvs, u32 *sizeoftlvs); |
72 | static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst, |
73 | const u8 *tlvs, u32 sizeoftlvs); |
74 | |
75 | static int lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr, |
76 | unsigned long permanent); |
77 | static void lec_arp_check_empties(struct lec_priv *priv, |
78 | struct atm_vcc *vcc, struct sk_buff *skb); |
79 | static void lec_arp_destroy(struct lec_priv *priv); |
80 | static void lec_arp_init(struct lec_priv *priv); |
81 | static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv, |
82 | const unsigned char *mac_to_find, |
83 | int is_rdesc, |
84 | struct lec_arp_table **ret_entry); |
85 | static void lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr, |
86 | const unsigned char *atm_addr, |
87 | unsigned long remoteflag, |
88 | unsigned int targetless_le_arp); |
89 | static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id); |
90 | static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc); |
91 | static void lec_set_flush_tran_id(struct lec_priv *priv, |
92 | const unsigned char *atm_addr, |
93 | unsigned long tran_id); |
94 | static void lec_vcc_added(struct lec_priv *priv, |
95 | const struct atmlec_ioc *ioc_data, |
96 | struct atm_vcc *vcc, |
97 | void (*old_push)(struct atm_vcc *vcc, |
98 | struct sk_buff *skb)); |
99 | static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc); |
100 | |
101 | /* must be done under lec_arp_lock */ |
102 | static inline void lec_arp_hold(struct lec_arp_table *entry) |
103 | { |
104 | atomic_inc(&entry->usage); |
105 | } |
106 | |
107 | static inline void lec_arp_put(struct lec_arp_table *entry) |
108 | { |
109 | if (atomic_dec_and_test(&entry->usage)) |
110 | kfree(entry); |
111 | } |
112 | |
113 | static struct lane2_ops lane2_ops = { |
114 | lane2_resolve, /* resolve, spec 3.1.3 */ |
115 | lane2_associate_req, /* associate_req, spec 3.1.4 */ |
116 | NULL /* associate indicator, spec 3.1.5 */ |
117 | }; |
118 | |
119 | static unsigned char bus_mac[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; |
120 | |
121 | /* Device structures */ |
122 | static struct net_device *dev_lec[MAX_LEC_ITF]; |
123 | |
124 | #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) |
125 | static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev) |
126 | { |
127 | char *buff; |
128 | struct lec_priv *priv; |
129 | |
130 | /* |
131 | * Check if this is a BPDU. If so, ask zeppelin to send |
132 | * LE_TOPOLOGY_REQUEST with the same value of Topology Change bit |
133 | * as the Config BPDU has |
134 | */ |
135 | buff = skb->data + skb->dev->hard_header_len; |
136 | if (*buff++ == 0x42 && *buff++ == 0x42 && *buff++ == 0x03) { |
137 | struct sock *sk; |
138 | struct sk_buff *skb2; |
139 | struct atmlec_msg *mesg; |
140 | |
141 | skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC); |
142 | if (skb2 == NULL) |
143 | return; |
144 | skb2->len = sizeof(struct atmlec_msg); |
145 | mesg = (struct atmlec_msg *)skb2->data; |
146 | mesg->type = l_topology_change; |
147 | buff += 4; |
148 | mesg->content.normal.flag = *buff & 0x01; |
149 | /* 0x01 is topology change */ |
150 | |
151 | priv = netdev_priv(dev); |
152 | atm_force_charge(priv->lecd, skb2->truesize); |
153 | sk = sk_atm(priv->lecd); |
154 | skb_queue_tail(&sk->sk_receive_queue, skb2); |
155 | sk->sk_data_ready(sk, skb2->len); |
156 | } |
157 | } |
158 | #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */ |
159 | |
160 | /* |
161 | * Open/initialize the netdevice. This is called (in the current kernel) |
162 | * sometime after booting when the 'ifconfig' program is run. |
163 | * |
164 | * This routine should set everything up anew at each open, even |
165 | * registers that "should" only need to be set once at boot, so that |
166 | * there is non-reboot way to recover if something goes wrong. |
167 | */ |
168 | |
169 | static int lec_open(struct net_device *dev) |
170 | { |
171 | netif_start_queue(dev); |
172 | |
173 | return 0; |
174 | } |
175 | |
176 | static void |
177 | lec_send(struct atm_vcc *vcc, struct sk_buff *skb) |
178 | { |
179 | struct net_device *dev = skb->dev; |
180 | |
181 | ATM_SKB(skb)->vcc = vcc; |
182 | ATM_SKB(skb)->atm_options = vcc->atm_options; |
183 | |
184 | atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); |
185 | if (vcc->send(vcc, skb) < 0) { |
186 | dev->stats.tx_dropped++; |
187 | return; |
188 | } |
189 | |
190 | dev->stats.tx_packets++; |
191 | dev->stats.tx_bytes += skb->len; |
192 | } |
193 | |
194 | static void lec_tx_timeout(struct net_device *dev) |
195 | { |
196 | pr_info("%s\n", dev->name); |
197 | dev->trans_start = jiffies; |
198 | netif_wake_queue(dev); |
199 | } |
200 | |
201 | static netdev_tx_t lec_start_xmit(struct sk_buff *skb, |
202 | struct net_device *dev) |
203 | { |
204 | struct sk_buff *skb2; |
205 | struct lec_priv *priv = netdev_priv(dev); |
206 | struct lecdatahdr_8023 *lec_h; |
207 | struct atm_vcc *vcc; |
208 | struct lec_arp_table *entry; |
209 | unsigned char *dst; |
210 | int min_frame_size; |
211 | int is_rdesc; |
212 | |
213 | pr_debug("called\n"); |
214 | if (!priv->lecd) { |
215 | pr_info("%s:No lecd attached\n", dev->name); |
216 | dev->stats.tx_errors++; |
217 | netif_stop_queue(dev); |
218 | kfree_skb(skb); |
219 | return NETDEV_TX_OK; |
220 | } |
221 | |
222 | pr_debug("skbuff head:%lx data:%lx tail:%lx end:%lx\n", |
223 | (long)skb->head, (long)skb->data, (long)skb_tail_pointer(skb), |
224 | (long)skb_end_pointer(skb)); |
225 | #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) |
226 | if (memcmp(skb->data, bridge_ula_lec, sizeof(bridge_ula_lec)) == 0) |
227 | lec_handle_bridge(skb, dev); |
228 | #endif |
229 | |
230 | /* Make sure we have room for lec_id */ |
231 | if (skb_headroom(skb) < 2) { |
232 | pr_debug("reallocating skb\n"); |
233 | skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN); |
234 | if (unlikely(!skb2)) { |
235 | kfree_skb(skb); |
236 | return NETDEV_TX_OK; |
237 | } |
238 | consume_skb(skb); |
239 | skb = skb2; |
240 | } |
241 | skb_push(skb, 2); |
242 | |
243 | /* Put le header to place */ |
244 | lec_h = (struct lecdatahdr_8023 *)skb->data; |
245 | lec_h->le_header = htons(priv->lecid); |
246 | |
247 | #if DUMP_PACKETS >= 2 |
248 | #define MAX_DUMP_SKB 99 |
249 | #elif DUMP_PACKETS >= 1 |
250 | #define MAX_DUMP_SKB 30 |
251 | #endif |
252 | #if DUMP_PACKETS >= 1 |
253 | printk(KERN_DEBUG "%s: send datalen:%ld lecid:%4.4x\n", |
254 | dev->name, skb->len, priv->lecid); |
255 | print_hex_dump(KERN_DEBUG, "", DUMP_OFFSET, 16, 1, |
256 | skb->data, min(skb->len, MAX_DUMP_SKB), true); |
257 | #endif /* DUMP_PACKETS >= 1 */ |
258 | |
259 | /* Minimum ethernet-frame size */ |
260 | min_frame_size = LEC_MINIMUM_8023_SIZE; |
261 | if (skb->len < min_frame_size) { |
262 | if ((skb->len + skb_tailroom(skb)) < min_frame_size) { |
263 | skb2 = skb_copy_expand(skb, 0, |
264 | min_frame_size - skb->truesize, |
265 | GFP_ATOMIC); |
266 | dev_kfree_skb(skb); |
267 | if (skb2 == NULL) { |
268 | dev->stats.tx_dropped++; |
269 | return NETDEV_TX_OK; |
270 | } |
271 | skb = skb2; |
272 | } |
273 | skb_put(skb, min_frame_size - skb->len); |
274 | } |
275 | |
276 | /* Send to right vcc */ |
277 | is_rdesc = 0; |
278 | dst = lec_h->h_dest; |
279 | entry = NULL; |
280 | vcc = lec_arp_resolve(priv, dst, is_rdesc, &entry); |
281 | pr_debug("%s:vcc:%p vcc_flags:%lx, entry:%p\n", |
282 | dev->name, vcc, vcc ? vcc->flags : 0, entry); |
283 | if (!vcc || !test_bit(ATM_VF_READY, &vcc->flags)) { |
284 | if (entry && (entry->tx_wait.qlen < LEC_UNRES_QUE_LEN)) { |
285 | pr_debug("%s:queuing packet, MAC address %pM\n", |
286 | dev->name, lec_h->h_dest); |
287 | skb_queue_tail(&entry->tx_wait, skb); |
288 | } else { |
289 | pr_debug("%s:tx queue full or no arp entry, dropping, MAC address: %pM\n", |
290 | dev->name, lec_h->h_dest); |
291 | dev->stats.tx_dropped++; |
292 | dev_kfree_skb(skb); |
293 | } |
294 | goto out; |
295 | } |
296 | #if DUMP_PACKETS > 0 |
297 | printk(KERN_DEBUG "%s:sending to vpi:%d vci:%d\n", |
298 | dev->name, vcc->vpi, vcc->vci); |
299 | #endif /* DUMP_PACKETS > 0 */ |
300 | |
301 | while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) { |
302 | pr_debug("emptying tx queue, MAC address %pM\n", lec_h->h_dest); |
303 | lec_send(vcc, skb2); |
304 | } |
305 | |
306 | lec_send(vcc, skb); |
307 | |
308 | if (!atm_may_send(vcc, 0)) { |
309 | struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); |
310 | |
311 | vpriv->xoff = 1; |
312 | netif_stop_queue(dev); |
313 | |
314 | /* |
315 | * vcc->pop() might have occurred in between, making |
316 | * the vcc usuable again. Since xmit is serialized, |
317 | * this is the only situation we have to re-test. |
318 | */ |
319 | |
320 | if (atm_may_send(vcc, 0)) |
321 | netif_wake_queue(dev); |
322 | } |
323 | |
324 | out: |
325 | if (entry) |
326 | lec_arp_put(entry); |
327 | dev->trans_start = jiffies; |
328 | return NETDEV_TX_OK; |
329 | } |
330 | |
331 | /* The inverse routine to net_open(). */ |
332 | static int lec_close(struct net_device *dev) |
333 | { |
334 | netif_stop_queue(dev); |
335 | return 0; |
336 | } |
337 | |
338 | static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb) |
339 | { |
340 | unsigned long flags; |
341 | struct net_device *dev = (struct net_device *)vcc->proto_data; |
342 | struct lec_priv *priv = netdev_priv(dev); |
343 | struct atmlec_msg *mesg; |
344 | struct lec_arp_table *entry; |
345 | int i; |
346 | char *tmp; /* FIXME */ |
347 | |
348 | atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); |
349 | mesg = (struct atmlec_msg *)skb->data; |
350 | tmp = skb->data; |
351 | tmp += sizeof(struct atmlec_msg); |
352 | pr_debug("%s: msg from zeppelin:%d\n", dev->name, mesg->type); |
353 | switch (mesg->type) { |
354 | case l_set_mac_addr: |
355 | for (i = 0; i < 6; i++) |
356 | dev->dev_addr[i] = mesg->content.normal.mac_addr[i]; |
357 | break; |
358 | case l_del_mac_addr: |
359 | for (i = 0; i < 6; i++) |
360 | dev->dev_addr[i] = 0; |
361 | break; |
362 | case l_addr_delete: |
363 | lec_addr_delete(priv, mesg->content.normal.atm_addr, |
364 | mesg->content.normal.flag); |
365 | break; |
366 | case l_topology_change: |
367 | priv->topology_change = mesg->content.normal.flag; |
368 | break; |
369 | case l_flush_complete: |
370 | lec_flush_complete(priv, mesg->content.normal.flag); |
371 | break; |
372 | case l_narp_req: /* LANE2: see 7.1.35 in the lane2 spec */ |
373 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
374 | entry = lec_arp_find(priv, mesg->content.normal.mac_addr); |
375 | lec_arp_remove(priv, entry); |
376 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
377 | |
378 | if (mesg->content.normal.no_source_le_narp) |
379 | break; |
380 | /* FALL THROUGH */ |
381 | case l_arp_update: |
382 | lec_arp_update(priv, mesg->content.normal.mac_addr, |
383 | mesg->content.normal.atm_addr, |
384 | mesg->content.normal.flag, |
385 | mesg->content.normal.targetless_le_arp); |
386 | pr_debug("in l_arp_update\n"); |
387 | if (mesg->sizeoftlvs != 0) { /* LANE2 3.1.5 */ |
388 | pr_debug("LANE2 3.1.5, got tlvs, size %d\n", |
389 | mesg->sizeoftlvs); |
390 | lane2_associate_ind(dev, mesg->content.normal.mac_addr, |
391 | tmp, mesg->sizeoftlvs); |
392 | } |
393 | break; |
394 | case l_config: |
395 | priv->maximum_unknown_frame_count = |
396 | mesg->content.config.maximum_unknown_frame_count; |
397 | priv->max_unknown_frame_time = |
398 | (mesg->content.config.max_unknown_frame_time * HZ); |
399 | priv->max_retry_count = mesg->content.config.max_retry_count; |
400 | priv->aging_time = (mesg->content.config.aging_time * HZ); |
401 | priv->forward_delay_time = |
402 | (mesg->content.config.forward_delay_time * HZ); |
403 | priv->arp_response_time = |
404 | (mesg->content.config.arp_response_time * HZ); |
405 | priv->flush_timeout = (mesg->content.config.flush_timeout * HZ); |
406 | priv->path_switching_delay = |
407 | (mesg->content.config.path_switching_delay * HZ); |
408 | priv->lane_version = mesg->content.config.lane_version; |
409 | /* LANE2 */ |
410 | priv->lane2_ops = NULL; |
411 | if (priv->lane_version > 1) |
412 | priv->lane2_ops = &lane2_ops; |
413 | if (dev_set_mtu(dev, mesg->content.config.mtu)) |
414 | pr_info("%s: change_mtu to %d failed\n", |
415 | dev->name, mesg->content.config.mtu); |
416 | priv->is_proxy = mesg->content.config.is_proxy; |
417 | break; |
418 | case l_flush_tran_id: |
419 | lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr, |
420 | mesg->content.normal.flag); |
421 | break; |
422 | case l_set_lecid: |
423 | priv->lecid = |
424 | (unsigned short)(0xffff & mesg->content.normal.flag); |
425 | break; |
426 | case l_should_bridge: |
427 | #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) |
428 | { |
429 | pr_debug("%s: bridge zeppelin asks about %pM\n", |
430 | dev->name, mesg->content.proxy.mac_addr); |
431 | |
432 | if (br_fdb_test_addr_hook == NULL) |
433 | break; |
434 | |
435 | if (br_fdb_test_addr_hook(dev, mesg->content.proxy.mac_addr)) { |
436 | /* hit from bridge table, send LE_ARP_RESPONSE */ |
437 | struct sk_buff *skb2; |
438 | struct sock *sk; |
439 | |
440 | pr_debug("%s: entry found, responding to zeppelin\n", |
441 | dev->name); |
442 | skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC); |
443 | if (skb2 == NULL) |
444 | break; |
445 | skb2->len = sizeof(struct atmlec_msg); |
446 | skb_copy_to_linear_data(skb2, mesg, sizeof(*mesg)); |
447 | atm_force_charge(priv->lecd, skb2->truesize); |
448 | sk = sk_atm(priv->lecd); |
449 | skb_queue_tail(&sk->sk_receive_queue, skb2); |
450 | sk->sk_data_ready(sk, skb2->len); |
451 | } |
452 | } |
453 | #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */ |
454 | break; |
455 | default: |
456 | pr_info("%s: Unknown message type %d\n", dev->name, mesg->type); |
457 | dev_kfree_skb(skb); |
458 | return -EINVAL; |
459 | } |
460 | dev_kfree_skb(skb); |
461 | return 0; |
462 | } |
463 | |
464 | static void lec_atm_close(struct atm_vcc *vcc) |
465 | { |
466 | struct sk_buff *skb; |
467 | struct net_device *dev = (struct net_device *)vcc->proto_data; |
468 | struct lec_priv *priv = netdev_priv(dev); |
469 | |
470 | priv->lecd = NULL; |
471 | /* Do something needful? */ |
472 | |
473 | netif_stop_queue(dev); |
474 | lec_arp_destroy(priv); |
475 | |
476 | if (skb_peek(&sk_atm(vcc)->sk_receive_queue)) |
477 | pr_info("%s closing with messages pending\n", dev->name); |
478 | while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue))) { |
479 | atm_return(vcc, skb->truesize); |
480 | dev_kfree_skb(skb); |
481 | } |
482 | |
483 | pr_info("%s: Shut down!\n", dev->name); |
484 | module_put(THIS_MODULE); |
485 | } |
486 | |
487 | static struct atmdev_ops lecdev_ops = { |
488 | .close = lec_atm_close, |
489 | .send = lec_atm_send |
490 | }; |
491 | |
492 | static struct atm_dev lecatm_dev = { |
493 | .ops = &lecdev_ops, |
494 | .type = "lec", |
495 | .number = 999, /* dummy device number */ |
496 | .lock = __SPIN_LOCK_UNLOCKED(lecatm_dev.lock) |
497 | }; |
498 | |
499 | /* |
500 | * LANE2: new argument struct sk_buff *data contains |
501 | * the LE_ARP based TLVs introduced in the LANE2 spec |
502 | */ |
503 | static int |
504 | send_to_lecd(struct lec_priv *priv, atmlec_msg_type type, |
505 | const unsigned char *mac_addr, const unsigned char *atm_addr, |
506 | struct sk_buff *data) |
507 | { |
508 | struct sock *sk; |
509 | struct sk_buff *skb; |
510 | struct atmlec_msg *mesg; |
511 | |
512 | if (!priv || !priv->lecd) |
513 | return -1; |
514 | skb = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC); |
515 | if (!skb) |
516 | return -1; |
517 | skb->len = sizeof(struct atmlec_msg); |
518 | mesg = (struct atmlec_msg *)skb->data; |
519 | memset(mesg, 0, sizeof(struct atmlec_msg)); |
520 | mesg->type = type; |
521 | if (data != NULL) |
522 | mesg->sizeoftlvs = data->len; |
523 | if (mac_addr) |
524 | memcpy(&mesg->content.normal.mac_addr, mac_addr, ETH_ALEN); |
525 | else |
526 | mesg->content.normal.targetless_le_arp = 1; |
527 | if (atm_addr) |
528 | memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN); |
529 | |
530 | atm_force_charge(priv->lecd, skb->truesize); |
531 | sk = sk_atm(priv->lecd); |
532 | skb_queue_tail(&sk->sk_receive_queue, skb); |
533 | sk->sk_data_ready(sk, skb->len); |
534 | |
535 | if (data != NULL) { |
536 | pr_debug("about to send %d bytes of data\n", data->len); |
537 | atm_force_charge(priv->lecd, data->truesize); |
538 | skb_queue_tail(&sk->sk_receive_queue, data); |
539 | sk->sk_data_ready(sk, skb->len); |
540 | } |
541 | |
542 | return 0; |
543 | } |
544 | |
545 | /* shamelessly stolen from drivers/net/net_init.c */ |
546 | static int lec_change_mtu(struct net_device *dev, int new_mtu) |
547 | { |
548 | if ((new_mtu < 68) || (new_mtu > 18190)) |
549 | return -EINVAL; |
550 | dev->mtu = new_mtu; |
551 | return 0; |
552 | } |
553 | |
554 | static void lec_set_multicast_list(struct net_device *dev) |
555 | { |
556 | /* |
557 | * by default, all multicast frames arrive over the bus. |
558 | * eventually support selective multicast service |
559 | */ |
560 | } |
561 | |
562 | static const struct net_device_ops lec_netdev_ops = { |
563 | .ndo_open = lec_open, |
564 | .ndo_stop = lec_close, |
565 | .ndo_start_xmit = lec_start_xmit, |
566 | .ndo_change_mtu = lec_change_mtu, |
567 | .ndo_tx_timeout = lec_tx_timeout, |
568 | .ndo_set_rx_mode = lec_set_multicast_list, |
569 | }; |
570 | |
571 | static const unsigned char lec_ctrl_magic[] = { |
572 | 0xff, |
573 | 0x00, |
574 | 0x01, |
575 | 0x01 |
576 | }; |
577 | |
578 | #define LEC_DATA_DIRECT_8023 2 |
579 | #define LEC_DATA_DIRECT_8025 3 |
580 | |
581 | static int lec_is_data_direct(struct atm_vcc *vcc) |
582 | { |
583 | return ((vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8023) || |
584 | (vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8025)); |
585 | } |
586 | |
587 | static void lec_push(struct atm_vcc *vcc, struct sk_buff *skb) |
588 | { |
589 | unsigned long flags; |
590 | struct net_device *dev = (struct net_device *)vcc->proto_data; |
591 | struct lec_priv *priv = netdev_priv(dev); |
592 | |
593 | #if DUMP_PACKETS > 0 |
594 | printk(KERN_DEBUG "%s: vcc vpi:%d vci:%d\n", |
595 | dev->name, vcc->vpi, vcc->vci); |
596 | #endif |
597 | if (!skb) { |
598 | pr_debug("%s: null skb\n", dev->name); |
599 | lec_vcc_close(priv, vcc); |
600 | return; |
601 | } |
602 | #if DUMP_PACKETS >= 2 |
603 | #define MAX_SKB_DUMP 99 |
604 | #elif DUMP_PACKETS >= 1 |
605 | #define MAX_SKB_DUMP 30 |
606 | #endif |
607 | #if DUMP_PACKETS > 0 |
608 | printk(KERN_DEBUG "%s: rcv datalen:%ld lecid:%4.4x\n", |
609 | dev->name, skb->len, priv->lecid); |
610 | print_hex_dump(KERN_DEBUG, "", DUMP_OFFSET, 16, 1, |
611 | skb->data, min(MAX_SKB_DUMP, skb->len), true); |
612 | #endif /* DUMP_PACKETS > 0 */ |
613 | if (memcmp(skb->data, lec_ctrl_magic, 4) == 0) { |
614 | /* Control frame, to daemon */ |
615 | struct sock *sk = sk_atm(vcc); |
616 | |
617 | pr_debug("%s: To daemon\n", dev->name); |
618 | skb_queue_tail(&sk->sk_receive_queue, skb); |
619 | sk->sk_data_ready(sk, skb->len); |
620 | } else { /* Data frame, queue to protocol handlers */ |
621 | struct lec_arp_table *entry; |
622 | unsigned char *src, *dst; |
623 | |
624 | atm_return(vcc, skb->truesize); |
625 | if (*(__be16 *) skb->data == htons(priv->lecid) || |
626 | !priv->lecd || !(dev->flags & IFF_UP)) { |
627 | /* |
628 | * Probably looping back, or if lecd is missing, |
629 | * lecd has gone down |
630 | */ |
631 | pr_debug("Ignoring frame...\n"); |
632 | dev_kfree_skb(skb); |
633 | return; |
634 | } |
635 | dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest; |
636 | |
637 | /* |
638 | * If this is a Data Direct VCC, and the VCC does not match |
639 | * the LE_ARP cache entry, delete the LE_ARP cache entry. |
640 | */ |
641 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
642 | if (lec_is_data_direct(vcc)) { |
643 | src = ((struct lecdatahdr_8023 *)skb->data)->h_source; |
644 | entry = lec_arp_find(priv, src); |
645 | if (entry && entry->vcc != vcc) { |
646 | lec_arp_remove(priv, entry); |
647 | lec_arp_put(entry); |
648 | } |
649 | } |
650 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
651 | |
652 | if (!(dst[0] & 0x01) && /* Never filter Multi/Broadcast */ |
653 | !priv->is_proxy && /* Proxy wants all the packets */ |
654 | memcmp(dst, dev->dev_addr, dev->addr_len)) { |
655 | dev_kfree_skb(skb); |
656 | return; |
657 | } |
658 | if (!hlist_empty(&priv->lec_arp_empty_ones)) |
659 | lec_arp_check_empties(priv, vcc, skb); |
660 | skb_pull(skb, 2); /* skip lec_id */ |
661 | skb->protocol = eth_type_trans(skb, dev); |
662 | dev->stats.rx_packets++; |
663 | dev->stats.rx_bytes += skb->len; |
664 | memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data)); |
665 | netif_rx(skb); |
666 | } |
667 | } |
668 | |
669 | static void lec_pop(struct atm_vcc *vcc, struct sk_buff *skb) |
670 | { |
671 | struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); |
672 | struct net_device *dev = skb->dev; |
673 | |
674 | if (vpriv == NULL) { |
675 | pr_info("vpriv = NULL!?!?!?\n"); |
676 | return; |
677 | } |
678 | |
679 | vpriv->old_pop(vcc, skb); |
680 | |
681 | if (vpriv->xoff && atm_may_send(vcc, 0)) { |
682 | vpriv->xoff = 0; |
683 | if (netif_running(dev) && netif_queue_stopped(dev)) |
684 | netif_wake_queue(dev); |
685 | } |
686 | } |
687 | |
688 | static int lec_vcc_attach(struct atm_vcc *vcc, void __user *arg) |
689 | { |
690 | struct lec_vcc_priv *vpriv; |
691 | int bytes_left; |
692 | struct atmlec_ioc ioc_data; |
693 | |
694 | /* Lecd must be up in this case */ |
695 | bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc)); |
696 | if (bytes_left != 0) |
697 | pr_info("copy from user failed for %d bytes\n", bytes_left); |
698 | if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF || |
699 | !dev_lec[ioc_data.dev_num]) |
700 | return -EINVAL; |
701 | vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL); |
702 | if (!vpriv) |
703 | return -ENOMEM; |
704 | vpriv->xoff = 0; |
705 | vpriv->old_pop = vcc->pop; |
706 | vcc->user_back = vpriv; |
707 | vcc->pop = lec_pop; |
708 | lec_vcc_added(netdev_priv(dev_lec[ioc_data.dev_num]), |
709 | &ioc_data, vcc, vcc->push); |
710 | vcc->proto_data = dev_lec[ioc_data.dev_num]; |
711 | vcc->push = lec_push; |
712 | return 0; |
713 | } |
714 | |
715 | static int lec_mcast_attach(struct atm_vcc *vcc, int arg) |
716 | { |
717 | if (arg < 0 || arg >= MAX_LEC_ITF || !dev_lec[arg]) |
718 | return -EINVAL; |
719 | vcc->proto_data = dev_lec[arg]; |
720 | return lec_mcast_make(netdev_priv(dev_lec[arg]), vcc); |
721 | } |
722 | |
723 | /* Initialize device. */ |
724 | static int lecd_attach(struct atm_vcc *vcc, int arg) |
725 | { |
726 | int i; |
727 | struct lec_priv *priv; |
728 | |
729 | if (arg < 0) |
730 | i = 0; |
731 | else |
732 | i = arg; |
733 | if (arg >= MAX_LEC_ITF) |
734 | return -EINVAL; |
735 | if (!dev_lec[i]) { |
736 | int size; |
737 | |
738 | size = sizeof(struct lec_priv); |
739 | dev_lec[i] = alloc_etherdev(size); |
740 | if (!dev_lec[i]) |
741 | return -ENOMEM; |
742 | dev_lec[i]->netdev_ops = &lec_netdev_ops; |
743 | snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i); |
744 | if (register_netdev(dev_lec[i])) { |
745 | free_netdev(dev_lec[i]); |
746 | return -EINVAL; |
747 | } |
748 | |
749 | priv = netdev_priv(dev_lec[i]); |
750 | } else { |
751 | priv = netdev_priv(dev_lec[i]); |
752 | if (priv->lecd) |
753 | return -EADDRINUSE; |
754 | } |
755 | lec_arp_init(priv); |
756 | priv->itfnum = i; /* LANE2 addition */ |
757 | priv->lecd = vcc; |
758 | vcc->dev = &lecatm_dev; |
759 | vcc_insert_socket(sk_atm(vcc)); |
760 | |
761 | vcc->proto_data = dev_lec[i]; |
762 | set_bit(ATM_VF_META, &vcc->flags); |
763 | set_bit(ATM_VF_READY, &vcc->flags); |
764 | |
765 | /* Set default values to these variables */ |
766 | priv->maximum_unknown_frame_count = 1; |
767 | priv->max_unknown_frame_time = (1 * HZ); |
768 | priv->vcc_timeout_period = (1200 * HZ); |
769 | priv->max_retry_count = 1; |
770 | priv->aging_time = (300 * HZ); |
771 | priv->forward_delay_time = (15 * HZ); |
772 | priv->topology_change = 0; |
773 | priv->arp_response_time = (1 * HZ); |
774 | priv->flush_timeout = (4 * HZ); |
775 | priv->path_switching_delay = (6 * HZ); |
776 | |
777 | if (dev_lec[i]->flags & IFF_UP) |
778 | netif_start_queue(dev_lec[i]); |
779 | __module_get(THIS_MODULE); |
780 | return i; |
781 | } |
782 | |
783 | #ifdef CONFIG_PROC_FS |
784 | static const char *lec_arp_get_status_string(unsigned char status) |
785 | { |
786 | static const char *const lec_arp_status_string[] = { |
787 | "ESI_UNKNOWN ", |
788 | "ESI_ARP_PENDING ", |
789 | "ESI_VC_PENDING ", |
790 | "<Undefined> ", |
791 | "ESI_FLUSH_PENDING ", |
792 | "ESI_FORWARD_DIRECT" |
793 | }; |
794 | |
795 | if (status > ESI_FORWARD_DIRECT) |
796 | status = 3; /* ESI_UNDEFINED */ |
797 | return lec_arp_status_string[status]; |
798 | } |
799 | |
800 | static void lec_info(struct seq_file *seq, struct lec_arp_table *entry) |
801 | { |
802 | int i; |
803 | |
804 | for (i = 0; i < ETH_ALEN; i++) |
805 | seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff); |
806 | seq_printf(seq, " "); |
807 | for (i = 0; i < ATM_ESA_LEN; i++) |
808 | seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff); |
809 | seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status), |
810 | entry->flags & 0xffff); |
811 | if (entry->vcc) |
812 | seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci); |
813 | else |
814 | seq_printf(seq, " "); |
815 | if (entry->recv_vcc) { |
816 | seq_printf(seq, " %3d %3d", entry->recv_vcc->vpi, |
817 | entry->recv_vcc->vci); |
818 | } |
819 | seq_putc(seq, '\n'); |
820 | } |
821 | |
822 | struct lec_state { |
823 | unsigned long flags; |
824 | struct lec_priv *locked; |
825 | struct hlist_node *node; |
826 | struct net_device *dev; |
827 | int itf; |
828 | int arp_table; |
829 | int misc_table; |
830 | }; |
831 | |
832 | static void *lec_tbl_walk(struct lec_state *state, struct hlist_head *tbl, |
833 | loff_t *l) |
834 | { |
835 | struct hlist_node *e = state->node; |
836 | struct lec_arp_table *tmp; |
837 | |
838 | if (!e) |
839 | e = tbl->first; |
840 | if (e == SEQ_START_TOKEN) { |
841 | e = tbl->first; |
842 | --*l; |
843 | } |
844 | |
845 | tmp = container_of(e, struct lec_arp_table, next); |
846 | |
847 | hlist_for_each_entry_from(tmp, next) { |
848 | if (--*l < 0) |
849 | break; |
850 | } |
851 | state->node = e; |
852 | |
853 | return (*l < 0) ? state : NULL; |
854 | } |
855 | |
856 | static void *lec_arp_walk(struct lec_state *state, loff_t *l, |
857 | struct lec_priv *priv) |
858 | { |
859 | void *v = NULL; |
860 | int p; |
861 | |
862 | for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) { |
863 | v = lec_tbl_walk(state, &priv->lec_arp_tables[p], l); |
864 | if (v) |
865 | break; |
866 | } |
867 | state->arp_table = p; |
868 | return v; |
869 | } |
870 | |
871 | static void *lec_misc_walk(struct lec_state *state, loff_t *l, |
872 | struct lec_priv *priv) |
873 | { |
874 | struct hlist_head *lec_misc_tables[] = { |
875 | &priv->lec_arp_empty_ones, |
876 | &priv->lec_no_forward, |
877 | &priv->mcast_fwds |
878 | }; |
879 | void *v = NULL; |
880 | int q; |
881 | |
882 | for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) { |
883 | v = lec_tbl_walk(state, lec_misc_tables[q], l); |
884 | if (v) |
885 | break; |
886 | } |
887 | state->misc_table = q; |
888 | return v; |
889 | } |
890 | |
891 | static void *lec_priv_walk(struct lec_state *state, loff_t *l, |
892 | struct lec_priv *priv) |
893 | { |
894 | if (!state->locked) { |
895 | state->locked = priv; |
896 | spin_lock_irqsave(&priv->lec_arp_lock, state->flags); |
897 | } |
898 | if (!lec_arp_walk(state, l, priv) && !lec_misc_walk(state, l, priv)) { |
899 | spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags); |
900 | state->locked = NULL; |
901 | /* Partial state reset for the next time we get called */ |
902 | state->arp_table = state->misc_table = 0; |
903 | } |
904 | return state->locked; |
905 | } |
906 | |
907 | static void *lec_itf_walk(struct lec_state *state, loff_t *l) |
908 | { |
909 | struct net_device *dev; |
910 | void *v; |
911 | |
912 | dev = state->dev ? state->dev : dev_lec[state->itf]; |
913 | v = (dev && netdev_priv(dev)) ? |
914 | lec_priv_walk(state, l, netdev_priv(dev)) : NULL; |
915 | if (!v && dev) { |
916 | dev_put(dev); |
917 | /* Partial state reset for the next time we get called */ |
918 | dev = NULL; |
919 | } |
920 | state->dev = dev; |
921 | return v; |
922 | } |
923 | |
924 | static void *lec_get_idx(struct lec_state *state, loff_t l) |
925 | { |
926 | void *v = NULL; |
927 | |
928 | for (; state->itf < MAX_LEC_ITF; state->itf++) { |
929 | v = lec_itf_walk(state, &l); |
930 | if (v) |
931 | break; |
932 | } |
933 | return v; |
934 | } |
935 | |
936 | static void *lec_seq_start(struct seq_file *seq, loff_t *pos) |
937 | { |
938 | struct lec_state *state = seq->private; |
939 | |
940 | state->itf = 0; |
941 | state->dev = NULL; |
942 | state->locked = NULL; |
943 | state->arp_table = 0; |
944 | state->misc_table = 0; |
945 | state->node = SEQ_START_TOKEN; |
946 | |
947 | return *pos ? lec_get_idx(state, *pos) : SEQ_START_TOKEN; |
948 | } |
949 | |
950 | static void lec_seq_stop(struct seq_file *seq, void *v) |
951 | { |
952 | struct lec_state *state = seq->private; |
953 | |
954 | if (state->dev) { |
955 | spin_unlock_irqrestore(&state->locked->lec_arp_lock, |
956 | state->flags); |
957 | dev_put(state->dev); |
958 | } |
959 | } |
960 | |
961 | static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
962 | { |
963 | struct lec_state *state = seq->private; |
964 | |
965 | v = lec_get_idx(state, 1); |
966 | *pos += !!PTR_ERR(v); |
967 | return v; |
968 | } |
969 | |
970 | static int lec_seq_show(struct seq_file *seq, void *v) |
971 | { |
972 | static const char lec_banner[] = |
973 | "Itf MAC ATM destination" |
974 | " Status Flags " |
975 | "VPI/VCI Recv VPI/VCI\n"; |
976 | |
977 | if (v == SEQ_START_TOKEN) |
978 | seq_puts(seq, lec_banner); |
979 | else { |
980 | struct lec_state *state = seq->private; |
981 | struct net_device *dev = state->dev; |
982 | struct lec_arp_table *entry = hlist_entry(state->node, |
983 | struct lec_arp_table, |
984 | next); |
985 | |
986 | seq_printf(seq, "%s ", dev->name); |
987 | lec_info(seq, entry); |
988 | } |
989 | return 0; |
990 | } |
991 | |
992 | static const struct seq_operations lec_seq_ops = { |
993 | .start = lec_seq_start, |
994 | .next = lec_seq_next, |
995 | .stop = lec_seq_stop, |
996 | .show = lec_seq_show, |
997 | }; |
998 | |
999 | static int lec_seq_open(struct inode *inode, struct file *file) |
1000 | { |
1001 | return seq_open_private(file, &lec_seq_ops, sizeof(struct lec_state)); |
1002 | } |
1003 | |
1004 | static const struct file_operations lec_seq_fops = { |
1005 | .owner = THIS_MODULE, |
1006 | .open = lec_seq_open, |
1007 | .read = seq_read, |
1008 | .llseek = seq_lseek, |
1009 | .release = seq_release_private, |
1010 | }; |
1011 | #endif |
1012 | |
1013 | static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
1014 | { |
1015 | struct atm_vcc *vcc = ATM_SD(sock); |
1016 | int err = 0; |
1017 | |
1018 | switch (cmd) { |
1019 | case ATMLEC_CTRL: |
1020 | case ATMLEC_MCAST: |
1021 | case ATMLEC_DATA: |
1022 | if (!capable(CAP_NET_ADMIN)) |
1023 | return -EPERM; |
1024 | break; |
1025 | default: |
1026 | return -ENOIOCTLCMD; |
1027 | } |
1028 | |
1029 | switch (cmd) { |
1030 | case ATMLEC_CTRL: |
1031 | err = lecd_attach(vcc, (int)arg); |
1032 | if (err >= 0) |
1033 | sock->state = SS_CONNECTED; |
1034 | break; |
1035 | case ATMLEC_MCAST: |
1036 | err = lec_mcast_attach(vcc, (int)arg); |
1037 | break; |
1038 | case ATMLEC_DATA: |
1039 | err = lec_vcc_attach(vcc, (void __user *)arg); |
1040 | break; |
1041 | } |
1042 | |
1043 | return err; |
1044 | } |
1045 | |
1046 | static struct atm_ioctl lane_ioctl_ops = { |
1047 | .owner = THIS_MODULE, |
1048 | .ioctl = lane_ioctl, |
1049 | }; |
1050 | |
1051 | static int __init lane_module_init(void) |
1052 | { |
1053 | #ifdef CONFIG_PROC_FS |
1054 | struct proc_dir_entry *p; |
1055 | |
1056 | p = proc_create("lec", S_IRUGO, atm_proc_root, &lec_seq_fops); |
1057 | if (!p) { |
1058 | pr_err("Unable to initialize /proc/net/atm/lec\n"); |
1059 | return -ENOMEM; |
1060 | } |
1061 | #endif |
1062 | |
1063 | register_atm_ioctl(&lane_ioctl_ops); |
1064 | pr_info("lec.c: initialized\n"); |
1065 | return 0; |
1066 | } |
1067 | |
1068 | static void __exit lane_module_cleanup(void) |
1069 | { |
1070 | int i; |
1071 | |
1072 | remove_proc_entry("lec", atm_proc_root); |
1073 | |
1074 | deregister_atm_ioctl(&lane_ioctl_ops); |
1075 | |
1076 | for (i = 0; i < MAX_LEC_ITF; i++) { |
1077 | if (dev_lec[i] != NULL) { |
1078 | unregister_netdev(dev_lec[i]); |
1079 | free_netdev(dev_lec[i]); |
1080 | dev_lec[i] = NULL; |
1081 | } |
1082 | } |
1083 | } |
1084 | |
1085 | module_init(lane_module_init); |
1086 | module_exit(lane_module_cleanup); |
1087 | |
1088 | /* |
1089 | * LANE2: 3.1.3, LE_RESOLVE.request |
1090 | * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs. |
1091 | * If sizeoftlvs == NULL the default TLVs associated with with this |
1092 | * lec will be used. |
1093 | * If dst_mac == NULL, targetless LE_ARP will be sent |
1094 | */ |
1095 | static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force, |
1096 | u8 **tlvs, u32 *sizeoftlvs) |
1097 | { |
1098 | unsigned long flags; |
1099 | struct lec_priv *priv = netdev_priv(dev); |
1100 | struct lec_arp_table *table; |
1101 | struct sk_buff *skb; |
1102 | int retval; |
1103 | |
1104 | if (force == 0) { |
1105 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
1106 | table = lec_arp_find(priv, dst_mac); |
1107 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
1108 | if (table == NULL) |
1109 | return -1; |
1110 | |
1111 | *tlvs = kmemdup(table->tlvs, table->sizeoftlvs, GFP_ATOMIC); |
1112 | if (*tlvs == NULL) |
1113 | return -1; |
1114 | |
1115 | *sizeoftlvs = table->sizeoftlvs; |
1116 | |
1117 | return 0; |
1118 | } |
1119 | |
1120 | if (sizeoftlvs == NULL) |
1121 | retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL); |
1122 | |
1123 | else { |
1124 | skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC); |
1125 | if (skb == NULL) |
1126 | return -1; |
1127 | skb->len = *sizeoftlvs; |
1128 | skb_copy_to_linear_data(skb, *tlvs, *sizeoftlvs); |
1129 | retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb); |
1130 | } |
1131 | return retval; |
1132 | } |
1133 | |
1134 | /* |
1135 | * LANE2: 3.1.4, LE_ASSOCIATE.request |
1136 | * Associate the *tlvs with the *lan_dst address. |
1137 | * Will overwrite any previous association |
1138 | * Returns 1 for success, 0 for failure (out of memory) |
1139 | * |
1140 | */ |
1141 | static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst, |
1142 | const u8 *tlvs, u32 sizeoftlvs) |
1143 | { |
1144 | int retval; |
1145 | struct sk_buff *skb; |
1146 | struct lec_priv *priv = netdev_priv(dev); |
1147 | |
1148 | if (!ether_addr_equal(lan_dst, dev->dev_addr)) |
1149 | return 0; /* not our mac address */ |
1150 | |
1151 | kfree(priv->tlvs); /* NULL if there was no previous association */ |
1152 | |
1153 | priv->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL); |
1154 | if (priv->tlvs == NULL) |
1155 | return 0; |
1156 | priv->sizeoftlvs = sizeoftlvs; |
1157 | |
1158 | skb = alloc_skb(sizeoftlvs, GFP_ATOMIC); |
1159 | if (skb == NULL) |
1160 | return 0; |
1161 | skb->len = sizeoftlvs; |
1162 | skb_copy_to_linear_data(skb, tlvs, sizeoftlvs); |
1163 | retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb); |
1164 | if (retval != 0) |
1165 | pr_info("lec.c: lane2_associate_req() failed\n"); |
1166 | /* |
1167 | * If the previous association has changed we must |
1168 | * somehow notify other LANE entities about the change |
1169 | */ |
1170 | return 1; |
1171 | } |
1172 | |
1173 | /* |
1174 | * LANE2: 3.1.5, LE_ASSOCIATE.indication |
1175 | * |
1176 | */ |
1177 | static void lane2_associate_ind(struct net_device *dev, const u8 *mac_addr, |
1178 | const u8 *tlvs, u32 sizeoftlvs) |
1179 | { |
1180 | #if 0 |
1181 | int i = 0; |
1182 | #endif |
1183 | struct lec_priv *priv = netdev_priv(dev); |
1184 | #if 0 /* |
1185 | * Why have the TLVs in LE_ARP entries |
1186 | * since we do not use them? When you |
1187 | * uncomment this code, make sure the |
1188 | * TLVs get freed when entry is killed |
1189 | */ |
1190 | struct lec_arp_table *entry = lec_arp_find(priv, mac_addr); |
1191 | |
1192 | if (entry == NULL) |
1193 | return; /* should not happen */ |
1194 | |
1195 | kfree(entry->tlvs); |
1196 | |
1197 | entry->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL); |
1198 | if (entry->tlvs == NULL) |
1199 | return; |
1200 | entry->sizeoftlvs = sizeoftlvs; |
1201 | #endif |
1202 | #if 0 |
1203 | pr_info("\n"); |
1204 | pr_info("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs); |
1205 | while (i < sizeoftlvs) |
1206 | pr_cont("%02x ", tlvs[i++]); |
1207 | |
1208 | pr_cont("\n"); |
1209 | #endif |
1210 | |
1211 | /* tell MPOA about the TLVs we saw */ |
1212 | if (priv->lane2_ops && priv->lane2_ops->associate_indicator) { |
1213 | priv->lane2_ops->associate_indicator(dev, mac_addr, |
1214 | tlvs, sizeoftlvs); |
1215 | } |
1216 | } |
1217 | |
1218 | /* |
1219 | * Here starts what used to lec_arpc.c |
1220 | * |
1221 | * lec_arpc.c was added here when making |
1222 | * lane client modular. October 1997 |
1223 | */ |
1224 | |
1225 | #include <linux/types.h> |
1226 | #include <linux/timer.h> |
1227 | #include <linux/param.h> |
1228 | #include <linux/atomic.h> |
1229 | #include <linux/inetdevice.h> |
1230 | #include <net/route.h> |
1231 | |
1232 | #if 0 |
1233 | #define pr_debug(format, args...) |
1234 | /* |
1235 | #define pr_debug printk |
1236 | */ |
1237 | #endif |
1238 | #define DEBUG_ARP_TABLE 0 |
1239 | |
1240 | #define LEC_ARP_REFRESH_INTERVAL (3*HZ) |
1241 | |
1242 | static void lec_arp_check_expire(struct work_struct *work); |
1243 | static void lec_arp_expire_arp(unsigned long data); |
1244 | |
1245 | /* |
1246 | * Arp table funcs |
1247 | */ |
1248 | |
1249 | #define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE - 1)) |
1250 | |
1251 | /* |
1252 | * Initialization of arp-cache |
1253 | */ |
1254 | static void lec_arp_init(struct lec_priv *priv) |
1255 | { |
1256 | unsigned short i; |
1257 | |
1258 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) |
1259 | INIT_HLIST_HEAD(&priv->lec_arp_tables[i]); |
1260 | INIT_HLIST_HEAD(&priv->lec_arp_empty_ones); |
1261 | INIT_HLIST_HEAD(&priv->lec_no_forward); |
1262 | INIT_HLIST_HEAD(&priv->mcast_fwds); |
1263 | spin_lock_init(&priv->lec_arp_lock); |
1264 | INIT_DELAYED_WORK(&priv->lec_arp_work, lec_arp_check_expire); |
1265 | schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL); |
1266 | } |
1267 | |
1268 | static void lec_arp_clear_vccs(struct lec_arp_table *entry) |
1269 | { |
1270 | if (entry->vcc) { |
1271 | struct atm_vcc *vcc = entry->vcc; |
1272 | struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); |
1273 | struct net_device *dev = (struct net_device *)vcc->proto_data; |
1274 | |
1275 | vcc->pop = vpriv->old_pop; |
1276 | if (vpriv->xoff) |
1277 | netif_wake_queue(dev); |
1278 | kfree(vpriv); |
1279 | vcc->user_back = NULL; |
1280 | vcc->push = entry->old_push; |
1281 | vcc_release_async(vcc, -EPIPE); |
1282 | entry->vcc = NULL; |
1283 | } |
1284 | if (entry->recv_vcc) { |
1285 | entry->recv_vcc->push = entry->old_recv_push; |
1286 | vcc_release_async(entry->recv_vcc, -EPIPE); |
1287 | entry->recv_vcc = NULL; |
1288 | } |
1289 | } |
1290 | |
1291 | /* |
1292 | * Insert entry to lec_arp_table |
1293 | * LANE2: Add to the end of the list to satisfy 8.1.13 |
1294 | */ |
1295 | static inline void |
1296 | lec_arp_add(struct lec_priv *priv, struct lec_arp_table *entry) |
1297 | { |
1298 | struct hlist_head *tmp; |
1299 | |
1300 | tmp = &priv->lec_arp_tables[HASH(entry->mac_addr[ETH_ALEN - 1])]; |
1301 | hlist_add_head(&entry->next, tmp); |
1302 | |
1303 | pr_debug("Added entry:%pM\n", entry->mac_addr); |
1304 | } |
1305 | |
1306 | /* |
1307 | * Remove entry from lec_arp_table |
1308 | */ |
1309 | static int |
1310 | lec_arp_remove(struct lec_priv *priv, struct lec_arp_table *to_remove) |
1311 | { |
1312 | struct lec_arp_table *entry; |
1313 | int i, remove_vcc = 1; |
1314 | |
1315 | if (!to_remove) |
1316 | return -1; |
1317 | |
1318 | hlist_del(&to_remove->next); |
1319 | del_timer(&to_remove->timer); |
1320 | |
1321 | /* |
1322 | * If this is the only MAC connected to this VCC, |
1323 | * also tear down the VCC |
1324 | */ |
1325 | if (to_remove->status >= ESI_FLUSH_PENDING) { |
1326 | /* |
1327 | * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT |
1328 | */ |
1329 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
1330 | hlist_for_each_entry(entry, |
1331 | &priv->lec_arp_tables[i], next) { |
1332 | if (memcmp(to_remove->atm_addr, |
1333 | entry->atm_addr, ATM_ESA_LEN) == 0) { |
1334 | remove_vcc = 0; |
1335 | break; |
1336 | } |
1337 | } |
1338 | } |
1339 | if (remove_vcc) |
1340 | lec_arp_clear_vccs(to_remove); |
1341 | } |
1342 | skb_queue_purge(&to_remove->tx_wait); /* FIXME: good place for this? */ |
1343 | |
1344 | pr_debug("Removed entry:%pM\n", to_remove->mac_addr); |
1345 | return 0; |
1346 | } |
1347 | |
1348 | #if DEBUG_ARP_TABLE |
1349 | static const char *get_status_string(unsigned char st) |
1350 | { |
1351 | switch (st) { |
1352 | case ESI_UNKNOWN: |
1353 | return "ESI_UNKNOWN"; |
1354 | case ESI_ARP_PENDING: |
1355 | return "ESI_ARP_PENDING"; |
1356 | case ESI_VC_PENDING: |
1357 | return "ESI_VC_PENDING"; |
1358 | case ESI_FLUSH_PENDING: |
1359 | return "ESI_FLUSH_PENDING"; |
1360 | case ESI_FORWARD_DIRECT: |
1361 | return "ESI_FORWARD_DIRECT"; |
1362 | } |
1363 | return "<UNKNOWN>"; |
1364 | } |
1365 | |
1366 | static void dump_arp_table(struct lec_priv *priv) |
1367 | { |
1368 | struct lec_arp_table *rulla; |
1369 | char buf[256]; |
1370 | int i, j, offset; |
1371 | |
1372 | pr_info("Dump %p:\n", priv); |
1373 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
1374 | hlist_for_each_entry(rulla, |
1375 | &priv->lec_arp_tables[i], next) { |
1376 | offset = 0; |
1377 | offset += sprintf(buf, "%d: %p\n", i, rulla); |
1378 | offset += sprintf(buf + offset, "Mac: %pM", |
1379 | rulla->mac_addr); |
1380 | offset += sprintf(buf + offset, " Atm:"); |
1381 | for (j = 0; j < ATM_ESA_LEN; j++) { |
1382 | offset += sprintf(buf + offset, |
1383 | "%2.2x ", |
1384 | rulla->atm_addr[j] & 0xff); |
1385 | } |
1386 | offset += sprintf(buf + offset, |
1387 | "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", |
1388 | rulla->vcc ? rulla->vcc->vpi : 0, |
1389 | rulla->vcc ? rulla->vcc->vci : 0, |
1390 | rulla->recv_vcc ? rulla->recv_vcc-> |
1391 | vpi : 0, |
1392 | rulla->recv_vcc ? rulla->recv_vcc-> |
1393 | vci : 0, rulla->last_used, |
1394 | rulla->timestamp, rulla->no_tries); |
1395 | offset += |
1396 | sprintf(buf + offset, |
1397 | "Flags:%x, Packets_flooded:%x, Status: %s ", |
1398 | rulla->flags, rulla->packets_flooded, |
1399 | get_status_string(rulla->status)); |
1400 | pr_info("%s\n", buf); |
1401 | } |
1402 | } |
1403 | |
1404 | if (!hlist_empty(&priv->lec_no_forward)) |
1405 | pr_info("No forward\n"); |
1406 | hlist_for_each_entry(rulla, &priv->lec_no_forward, next) { |
1407 | offset = 0; |
1408 | offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr); |
1409 | offset += sprintf(buf + offset, " Atm:"); |
1410 | for (j = 0; j < ATM_ESA_LEN; j++) { |
1411 | offset += sprintf(buf + offset, "%2.2x ", |
1412 | rulla->atm_addr[j] & 0xff); |
1413 | } |
1414 | offset += sprintf(buf + offset, |
1415 | "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", |
1416 | rulla->vcc ? rulla->vcc->vpi : 0, |
1417 | rulla->vcc ? rulla->vcc->vci : 0, |
1418 | rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, |
1419 | rulla->recv_vcc ? rulla->recv_vcc->vci : 0, |
1420 | rulla->last_used, |
1421 | rulla->timestamp, rulla->no_tries); |
1422 | offset += sprintf(buf + offset, |
1423 | "Flags:%x, Packets_flooded:%x, Status: %s ", |
1424 | rulla->flags, rulla->packets_flooded, |
1425 | get_status_string(rulla->status)); |
1426 | pr_info("%s\n", buf); |
1427 | } |
1428 | |
1429 | if (!hlist_empty(&priv->lec_arp_empty_ones)) |
1430 | pr_info("Empty ones\n"); |
1431 | hlist_for_each_entry(rulla, &priv->lec_arp_empty_ones, next) { |
1432 | offset = 0; |
1433 | offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr); |
1434 | offset += sprintf(buf + offset, " Atm:"); |
1435 | for (j = 0; j < ATM_ESA_LEN; j++) { |
1436 | offset += sprintf(buf + offset, "%2.2x ", |
1437 | rulla->atm_addr[j] & 0xff); |
1438 | } |
1439 | offset += sprintf(buf + offset, |
1440 | "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", |
1441 | rulla->vcc ? rulla->vcc->vpi : 0, |
1442 | rulla->vcc ? rulla->vcc->vci : 0, |
1443 | rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, |
1444 | rulla->recv_vcc ? rulla->recv_vcc->vci : 0, |
1445 | rulla->last_used, |
1446 | rulla->timestamp, rulla->no_tries); |
1447 | offset += sprintf(buf + offset, |
1448 | "Flags:%x, Packets_flooded:%x, Status: %s ", |
1449 | rulla->flags, rulla->packets_flooded, |
1450 | get_status_string(rulla->status)); |
1451 | pr_info("%s", buf); |
1452 | } |
1453 | |
1454 | if (!hlist_empty(&priv->mcast_fwds)) |
1455 | pr_info("Multicast Forward VCCs\n"); |
1456 | hlist_for_each_entry(rulla, &priv->mcast_fwds, next) { |
1457 | offset = 0; |
1458 | offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr); |
1459 | offset += sprintf(buf + offset, " Atm:"); |
1460 | for (j = 0; j < ATM_ESA_LEN; j++) { |
1461 | offset += sprintf(buf + offset, "%2.2x ", |
1462 | rulla->atm_addr[j] & 0xff); |
1463 | } |
1464 | offset += sprintf(buf + offset, |
1465 | "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", |
1466 | rulla->vcc ? rulla->vcc->vpi : 0, |
1467 | rulla->vcc ? rulla->vcc->vci : 0, |
1468 | rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, |
1469 | rulla->recv_vcc ? rulla->recv_vcc->vci : 0, |
1470 | rulla->last_used, |
1471 | rulla->timestamp, rulla->no_tries); |
1472 | offset += sprintf(buf + offset, |
1473 | "Flags:%x, Packets_flooded:%x, Status: %s ", |
1474 | rulla->flags, rulla->packets_flooded, |
1475 | get_status_string(rulla->status)); |
1476 | pr_info("%s\n", buf); |
1477 | } |
1478 | |
1479 | } |
1480 | #else |
1481 | #define dump_arp_table(priv) do { } while (0) |
1482 | #endif |
1483 | |
1484 | /* |
1485 | * Destruction of arp-cache |
1486 | */ |
1487 | static void lec_arp_destroy(struct lec_priv *priv) |
1488 | { |
1489 | unsigned long flags; |
1490 | struct hlist_node *next; |
1491 | struct lec_arp_table *entry; |
1492 | int i; |
1493 | |
1494 | cancel_delayed_work_sync(&priv->lec_arp_work); |
1495 | |
1496 | /* |
1497 | * Remove all entries |
1498 | */ |
1499 | |
1500 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
1501 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
1502 | hlist_for_each_entry_safe(entry, next, |
1503 | &priv->lec_arp_tables[i], next) { |
1504 | lec_arp_remove(priv, entry); |
1505 | lec_arp_put(entry); |
1506 | } |
1507 | INIT_HLIST_HEAD(&priv->lec_arp_tables[i]); |
1508 | } |
1509 | |
1510 | hlist_for_each_entry_safe(entry, next, |
1511 | &priv->lec_arp_empty_ones, next) { |
1512 | del_timer_sync(&entry->timer); |
1513 | lec_arp_clear_vccs(entry); |
1514 | hlist_del(&entry->next); |
1515 | lec_arp_put(entry); |
1516 | } |
1517 | INIT_HLIST_HEAD(&priv->lec_arp_empty_ones); |
1518 | |
1519 | hlist_for_each_entry_safe(entry, next, |
1520 | &priv->lec_no_forward, next) { |
1521 | del_timer_sync(&entry->timer); |
1522 | lec_arp_clear_vccs(entry); |
1523 | hlist_del(&entry->next); |
1524 | lec_arp_put(entry); |
1525 | } |
1526 | INIT_HLIST_HEAD(&priv->lec_no_forward); |
1527 | |
1528 | hlist_for_each_entry_safe(entry, next, &priv->mcast_fwds, next) { |
1529 | /* No timer, LANEv2 7.1.20 and 2.3.5.3 */ |
1530 | lec_arp_clear_vccs(entry); |
1531 | hlist_del(&entry->next); |
1532 | lec_arp_put(entry); |
1533 | } |
1534 | INIT_HLIST_HEAD(&priv->mcast_fwds); |
1535 | priv->mcast_vcc = NULL; |
1536 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
1537 | } |
1538 | |
1539 | /* |
1540 | * Find entry by mac_address |
1541 | */ |
1542 | static struct lec_arp_table *lec_arp_find(struct lec_priv *priv, |
1543 | const unsigned char *mac_addr) |
1544 | { |
1545 | struct hlist_head *head; |
1546 | struct lec_arp_table *entry; |
1547 | |
1548 | pr_debug("%pM\n", mac_addr); |
1549 | |
1550 | head = &priv->lec_arp_tables[HASH(mac_addr[ETH_ALEN - 1])]; |
1551 | hlist_for_each_entry(entry, head, next) { |
1552 | if (ether_addr_equal(mac_addr, entry->mac_addr)) |
1553 | return entry; |
1554 | } |
1555 | return NULL; |
1556 | } |
1557 | |
1558 | static struct lec_arp_table *make_entry(struct lec_priv *priv, |
1559 | const unsigned char *mac_addr) |
1560 | { |
1561 | struct lec_arp_table *to_return; |
1562 | |
1563 | to_return = kzalloc(sizeof(struct lec_arp_table), GFP_ATOMIC); |
1564 | if (!to_return) { |
1565 | pr_info("LEC: Arp entry kmalloc failed\n"); |
1566 | return NULL; |
1567 | } |
1568 | memcpy(to_return->mac_addr, mac_addr, ETH_ALEN); |
1569 | INIT_HLIST_NODE(&to_return->next); |
1570 | setup_timer(&to_return->timer, lec_arp_expire_arp, |
1571 | (unsigned long)to_return); |
1572 | to_return->last_used = jiffies; |
1573 | to_return->priv = priv; |
1574 | skb_queue_head_init(&to_return->tx_wait); |
1575 | atomic_set(&to_return->usage, 1); |
1576 | return to_return; |
1577 | } |
1578 | |
1579 | /* Arp sent timer expired */ |
1580 | static void lec_arp_expire_arp(unsigned long data) |
1581 | { |
1582 | struct lec_arp_table *entry; |
1583 | |
1584 | entry = (struct lec_arp_table *)data; |
1585 | |
1586 | pr_debug("\n"); |
1587 | if (entry->status == ESI_ARP_PENDING) { |
1588 | if (entry->no_tries <= entry->priv->max_retry_count) { |
1589 | if (entry->is_rdesc) |
1590 | send_to_lecd(entry->priv, l_rdesc_arp_xmt, |
1591 | entry->mac_addr, NULL, NULL); |
1592 | else |
1593 | send_to_lecd(entry->priv, l_arp_xmt, |
1594 | entry->mac_addr, NULL, NULL); |
1595 | entry->no_tries++; |
1596 | } |
1597 | mod_timer(&entry->timer, jiffies + (1 * HZ)); |
1598 | } |
1599 | } |
1600 | |
1601 | /* Unknown/unused vcc expire, remove associated entry */ |
1602 | static void lec_arp_expire_vcc(unsigned long data) |
1603 | { |
1604 | unsigned long flags; |
1605 | struct lec_arp_table *to_remove = (struct lec_arp_table *)data; |
1606 | struct lec_priv *priv = to_remove->priv; |
1607 | |
1608 | del_timer(&to_remove->timer); |
1609 | |
1610 | pr_debug("%p %p: vpi:%d vci:%d\n", |
1611 | to_remove, priv, |
1612 | to_remove->vcc ? to_remove->recv_vcc->vpi : 0, |
1613 | to_remove->vcc ? to_remove->recv_vcc->vci : 0); |
1614 | |
1615 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
1616 | hlist_del(&to_remove->next); |
1617 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
1618 | |
1619 | lec_arp_clear_vccs(to_remove); |
1620 | lec_arp_put(to_remove); |
1621 | } |
1622 | |
1623 | static bool __lec_arp_check_expire(struct lec_arp_table *entry, |
1624 | unsigned long now, |
1625 | struct lec_priv *priv) |
1626 | { |
1627 | unsigned long time_to_check; |
1628 | |
1629 | if ((entry->flags) & LEC_REMOTE_FLAG && priv->topology_change) |
1630 | time_to_check = priv->forward_delay_time; |
1631 | else |
1632 | time_to_check = priv->aging_time; |
1633 | |
1634 | pr_debug("About to expire: %lx - %lx > %lx\n", |
1635 | now, entry->last_used, time_to_check); |
1636 | if (time_after(now, entry->last_used + time_to_check) && |
1637 | !(entry->flags & LEC_PERMANENT_FLAG) && |
1638 | !(entry->mac_addr[0] & 0x01)) { /* LANE2: 7.1.20 */ |
1639 | /* Remove entry */ |
1640 | pr_debug("Entry timed out\n"); |
1641 | lec_arp_remove(priv, entry); |
1642 | lec_arp_put(entry); |
1643 | } else { |
1644 | /* Something else */ |
1645 | if ((entry->status == ESI_VC_PENDING || |
1646 | entry->status == ESI_ARP_PENDING) && |
1647 | time_after_eq(now, entry->timestamp + |
1648 | priv->max_unknown_frame_time)) { |
1649 | entry->timestamp = jiffies; |
1650 | entry->packets_flooded = 0; |
1651 | if (entry->status == ESI_VC_PENDING) |
1652 | send_to_lecd(priv, l_svc_setup, |
1653 | entry->mac_addr, |
1654 | entry->atm_addr, |
1655 | NULL); |
1656 | } |
1657 | if (entry->status == ESI_FLUSH_PENDING && |
1658 | time_after_eq(now, entry->timestamp + |
1659 | priv->path_switching_delay)) { |
1660 | lec_arp_hold(entry); |
1661 | return true; |
1662 | } |
1663 | } |
1664 | |
1665 | return false; |
1666 | } |
1667 | /* |
1668 | * Expire entries. |
1669 | * 1. Re-set timer |
1670 | * 2. For each entry, delete entries that have aged past the age limit. |
1671 | * 3. For each entry, depending on the status of the entry, perform |
1672 | * the following maintenance. |
1673 | * a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the |
1674 | * tick_count is above the max_unknown_frame_time, clear |
1675 | * the tick_count to zero and clear the packets_flooded counter |
1676 | * to zero. This supports the packet rate limit per address |
1677 | * while flooding unknowns. |
1678 | * b. If the status is ESI_FLUSH_PENDING and the tick_count is greater |
1679 | * than or equal to the path_switching_delay, change the status |
1680 | * to ESI_FORWARD_DIRECT. This causes the flush period to end |
1681 | * regardless of the progress of the flush protocol. |
1682 | */ |
1683 | static void lec_arp_check_expire(struct work_struct *work) |
1684 | { |
1685 | unsigned long flags; |
1686 | struct lec_priv *priv = |
1687 | container_of(work, struct lec_priv, lec_arp_work.work); |
1688 | struct hlist_node *next; |
1689 | struct lec_arp_table *entry; |
1690 | unsigned long now; |
1691 | int i; |
1692 | |
1693 | pr_debug("%p\n", priv); |
1694 | now = jiffies; |
1695 | restart: |
1696 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
1697 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
1698 | hlist_for_each_entry_safe(entry, next, |
1699 | &priv->lec_arp_tables[i], next) { |
1700 | if (__lec_arp_check_expire(entry, now, priv)) { |
1701 | struct sk_buff *skb; |
1702 | struct atm_vcc *vcc = entry->vcc; |
1703 | |
1704 | spin_unlock_irqrestore(&priv->lec_arp_lock, |
1705 | flags); |
1706 | while ((skb = skb_dequeue(&entry->tx_wait))) |
1707 | lec_send(vcc, skb); |
1708 | entry->last_used = jiffies; |
1709 | entry->status = ESI_FORWARD_DIRECT; |
1710 | lec_arp_put(entry); |
1711 | |
1712 | goto restart; |
1713 | } |
1714 | } |
1715 | } |
1716 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
1717 | |
1718 | schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL); |
1719 | } |
1720 | |
1721 | /* |
1722 | * Try to find vcc where mac_address is attached. |
1723 | * |
1724 | */ |
1725 | static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv, |
1726 | const unsigned char *mac_to_find, |
1727 | int is_rdesc, |
1728 | struct lec_arp_table **ret_entry) |
1729 | { |
1730 | unsigned long flags; |
1731 | struct lec_arp_table *entry; |
1732 | struct atm_vcc *found; |
1733 | |
1734 | if (mac_to_find[0] & 0x01) { |
1735 | switch (priv->lane_version) { |
1736 | case 1: |
1737 | return priv->mcast_vcc; |
1738 | case 2: /* LANE2 wants arp for multicast addresses */ |
1739 | if (ether_addr_equal(mac_to_find, bus_mac)) |
1740 | return priv->mcast_vcc; |
1741 | break; |
1742 | default: |
1743 | break; |
1744 | } |
1745 | } |
1746 | |
1747 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
1748 | entry = lec_arp_find(priv, mac_to_find); |
1749 | |
1750 | if (entry) { |
1751 | if (entry->status == ESI_FORWARD_DIRECT) { |
1752 | /* Connection Ok */ |
1753 | entry->last_used = jiffies; |
1754 | lec_arp_hold(entry); |
1755 | *ret_entry = entry; |
1756 | found = entry->vcc; |
1757 | goto out; |
1758 | } |
1759 | /* |
1760 | * If the LE_ARP cache entry is still pending, reset count to 0 |
1761 | * so another LE_ARP request can be made for this frame. |
1762 | */ |
1763 | if (entry->status == ESI_ARP_PENDING) |
1764 | entry->no_tries = 0; |
1765 | /* |
1766 | * Data direct VC not yet set up, check to see if the unknown |
1767 | * frame count is greater than the limit. If the limit has |
1768 | * not been reached, allow the caller to send packet to |
1769 | * BUS. |
1770 | */ |
1771 | if (entry->status != ESI_FLUSH_PENDING && |
1772 | entry->packets_flooded < |
1773 | priv->maximum_unknown_frame_count) { |
1774 | entry->packets_flooded++; |
1775 | pr_debug("Flooding..\n"); |
1776 | found = priv->mcast_vcc; |
1777 | goto out; |
1778 | } |
1779 | /* |
1780 | * We got here because entry->status == ESI_FLUSH_PENDING |
1781 | * or BUS flood limit was reached for an entry which is |
1782 | * in ESI_ARP_PENDING or ESI_VC_PENDING state. |
1783 | */ |
1784 | lec_arp_hold(entry); |
1785 | *ret_entry = entry; |
1786 | pr_debug("entry->status %d entry->vcc %p\n", entry->status, |
1787 | entry->vcc); |
1788 | found = NULL; |
1789 | } else { |
1790 | /* No matching entry was found */ |
1791 | entry = make_entry(priv, mac_to_find); |
1792 | pr_debug("Making entry\n"); |
1793 | if (!entry) { |
1794 | found = priv->mcast_vcc; |
1795 | goto out; |
1796 | } |
1797 | lec_arp_add(priv, entry); |
1798 | /* We want arp-request(s) to be sent */ |
1799 | entry->packets_flooded = 1; |
1800 | entry->status = ESI_ARP_PENDING; |
1801 | entry->no_tries = 1; |
1802 | entry->last_used = entry->timestamp = jiffies; |
1803 | entry->is_rdesc = is_rdesc; |
1804 | if (entry->is_rdesc) |
1805 | send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL, |
1806 | NULL); |
1807 | else |
1808 | send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL); |
1809 | entry->timer.expires = jiffies + (1 * HZ); |
1810 | entry->timer.function = lec_arp_expire_arp; |
1811 | add_timer(&entry->timer); |
1812 | found = priv->mcast_vcc; |
1813 | } |
1814 | |
1815 | out: |
1816 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
1817 | return found; |
1818 | } |
1819 | |
1820 | static int |
1821 | lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr, |
1822 | unsigned long permanent) |
1823 | { |
1824 | unsigned long flags; |
1825 | struct hlist_node *next; |
1826 | struct lec_arp_table *entry; |
1827 | int i; |
1828 | |
1829 | pr_debug("\n"); |
1830 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
1831 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
1832 | hlist_for_each_entry_safe(entry, next, |
1833 | &priv->lec_arp_tables[i], next) { |
1834 | if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN) && |
1835 | (permanent || |
1836 | !(entry->flags & LEC_PERMANENT_FLAG))) { |
1837 | lec_arp_remove(priv, entry); |
1838 | lec_arp_put(entry); |
1839 | } |
1840 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
1841 | return 0; |
1842 | } |
1843 | } |
1844 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
1845 | return -1; |
1846 | } |
1847 | |
1848 | /* |
1849 | * Notifies: Response to arp_request (atm_addr != NULL) |
1850 | */ |
1851 | static void |
1852 | lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr, |
1853 | const unsigned char *atm_addr, unsigned long remoteflag, |
1854 | unsigned int targetless_le_arp) |
1855 | { |
1856 | unsigned long flags; |
1857 | struct hlist_node *next; |
1858 | struct lec_arp_table *entry, *tmp; |
1859 | int i; |
1860 | |
1861 | pr_debug("%smac:%pM\n", |
1862 | (targetless_le_arp) ? "targetless " : "", mac_addr); |
1863 | |
1864 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
1865 | entry = lec_arp_find(priv, mac_addr); |
1866 | if (entry == NULL && targetless_le_arp) |
1867 | goto out; /* |
1868 | * LANE2: ignore targetless LE_ARPs for which |
1869 | * we have no entry in the cache. 7.1.30 |
1870 | */ |
1871 | if (!hlist_empty(&priv->lec_arp_empty_ones)) { |
1872 | hlist_for_each_entry_safe(entry, next, |
1873 | &priv->lec_arp_empty_ones, next) { |
1874 | if (memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN) == 0) { |
1875 | hlist_del(&entry->next); |
1876 | del_timer(&entry->timer); |
1877 | tmp = lec_arp_find(priv, mac_addr); |
1878 | if (tmp) { |
1879 | del_timer(&tmp->timer); |
1880 | tmp->status = ESI_FORWARD_DIRECT; |
1881 | memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN); |
1882 | tmp->vcc = entry->vcc; |
1883 | tmp->old_push = entry->old_push; |
1884 | tmp->last_used = jiffies; |
1885 | del_timer(&entry->timer); |
1886 | lec_arp_put(entry); |
1887 | entry = tmp; |
1888 | } else { |
1889 | entry->status = ESI_FORWARD_DIRECT; |
1890 | memcpy(entry->mac_addr, mac_addr, ETH_ALEN); |
1891 | entry->last_used = jiffies; |
1892 | lec_arp_add(priv, entry); |
1893 | } |
1894 | if (remoteflag) |
1895 | entry->flags |= LEC_REMOTE_FLAG; |
1896 | else |
1897 | entry->flags &= ~LEC_REMOTE_FLAG; |
1898 | pr_debug("After update\n"); |
1899 | dump_arp_table(priv); |
1900 | goto out; |
1901 | } |
1902 | } |
1903 | } |
1904 | |
1905 | entry = lec_arp_find(priv, mac_addr); |
1906 | if (!entry) { |
1907 | entry = make_entry(priv, mac_addr); |
1908 | if (!entry) |
1909 | goto out; |
1910 | entry->status = ESI_UNKNOWN; |
1911 | lec_arp_add(priv, entry); |
1912 | /* Temporary, changes before end of function */ |
1913 | } |
1914 | memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN); |
1915 | del_timer(&entry->timer); |
1916 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
1917 | hlist_for_each_entry(tmp, |
1918 | &priv->lec_arp_tables[i], next) { |
1919 | if (entry != tmp && |
1920 | !memcmp(tmp->atm_addr, atm_addr, ATM_ESA_LEN)) { |
1921 | /* Vcc to this host exists */ |
1922 | if (tmp->status > ESI_VC_PENDING) { |
1923 | /* |
1924 | * ESI_FLUSH_PENDING, |
1925 | * ESI_FORWARD_DIRECT |
1926 | */ |
1927 | entry->vcc = tmp->vcc; |
1928 | entry->old_push = tmp->old_push; |
1929 | } |
1930 | entry->status = tmp->status; |
1931 | break; |
1932 | } |
1933 | } |
1934 | } |
1935 | if (remoteflag) |
1936 | entry->flags |= LEC_REMOTE_FLAG; |
1937 | else |
1938 | entry->flags &= ~LEC_REMOTE_FLAG; |
1939 | if (entry->status == ESI_ARP_PENDING || entry->status == ESI_UNKNOWN) { |
1940 | entry->status = ESI_VC_PENDING; |
1941 | send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL); |
1942 | } |
1943 | pr_debug("After update2\n"); |
1944 | dump_arp_table(priv); |
1945 | out: |
1946 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
1947 | } |
1948 | |
1949 | /* |
1950 | * Notifies: Vcc setup ready |
1951 | */ |
1952 | static void |
1953 | lec_vcc_added(struct lec_priv *priv, const struct atmlec_ioc *ioc_data, |
1954 | struct atm_vcc *vcc, |
1955 | void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb)) |
1956 | { |
1957 | unsigned long flags; |
1958 | struct lec_arp_table *entry; |
1959 | int i, found_entry = 0; |
1960 | |
1961 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
1962 | /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */ |
1963 | if (ioc_data->receive == 2) { |
1964 | pr_debug("LEC_ARP: Attaching mcast forward\n"); |
1965 | #if 0 |
1966 | entry = lec_arp_find(priv, bus_mac); |
1967 | if (!entry) { |
1968 | pr_info("LEC_ARP: Multicast entry not found!\n"); |
1969 | goto out; |
1970 | } |
1971 | memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); |
1972 | entry->recv_vcc = vcc; |
1973 | entry->old_recv_push = old_push; |
1974 | #endif |
1975 | entry = make_entry(priv, bus_mac); |
1976 | if (entry == NULL) |
1977 | goto out; |
1978 | del_timer(&entry->timer); |
1979 | memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); |
1980 | entry->recv_vcc = vcc; |
1981 | entry->old_recv_push = old_push; |
1982 | hlist_add_head(&entry->next, &priv->mcast_fwds); |
1983 | goto out; |
1984 | } else if (ioc_data->receive == 1) { |
1985 | /* |
1986 | * Vcc which we don't want to make default vcc, |
1987 | * attach it anyway. |
1988 | */ |
1989 | pr_debug("LEC_ARP:Attaching data direct, not default: %2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n", |
1990 | ioc_data->atm_addr[0], ioc_data->atm_addr[1], |
1991 | ioc_data->atm_addr[2], ioc_data->atm_addr[3], |
1992 | ioc_data->atm_addr[4], ioc_data->atm_addr[5], |
1993 | ioc_data->atm_addr[6], ioc_data->atm_addr[7], |
1994 | ioc_data->atm_addr[8], ioc_data->atm_addr[9], |
1995 | ioc_data->atm_addr[10], ioc_data->atm_addr[11], |
1996 | ioc_data->atm_addr[12], ioc_data->atm_addr[13], |
1997 | ioc_data->atm_addr[14], ioc_data->atm_addr[15], |
1998 | ioc_data->atm_addr[16], ioc_data->atm_addr[17], |
1999 | ioc_data->atm_addr[18], ioc_data->atm_addr[19]); |
2000 | entry = make_entry(priv, bus_mac); |
2001 | if (entry == NULL) |
2002 | goto out; |
2003 | memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); |
2004 | memset(entry->mac_addr, 0, ETH_ALEN); |
2005 | entry->recv_vcc = vcc; |
2006 | entry->old_recv_push = old_push; |
2007 | entry->status = ESI_UNKNOWN; |
2008 | entry->timer.expires = jiffies + priv->vcc_timeout_period; |
2009 | entry->timer.function = lec_arp_expire_vcc; |
2010 | hlist_add_head(&entry->next, &priv->lec_no_forward); |
2011 | add_timer(&entry->timer); |
2012 | dump_arp_table(priv); |
2013 | goto out; |
2014 | } |
2015 | pr_debug("LEC_ARP:Attaching data direct, default: %2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n", |
2016 | ioc_data->atm_addr[0], ioc_data->atm_addr[1], |
2017 | ioc_data->atm_addr[2], ioc_data->atm_addr[3], |
2018 | ioc_data->atm_addr[4], ioc_data->atm_addr[5], |
2019 | ioc_data->atm_addr[6], ioc_data->atm_addr[7], |
2020 | ioc_data->atm_addr[8], ioc_data->atm_addr[9], |
2021 | ioc_data->atm_addr[10], ioc_data->atm_addr[11], |
2022 | ioc_data->atm_addr[12], ioc_data->atm_addr[13], |
2023 | ioc_data->atm_addr[14], ioc_data->atm_addr[15], |
2024 | ioc_data->atm_addr[16], ioc_data->atm_addr[17], |
2025 | ioc_data->atm_addr[18], ioc_data->atm_addr[19]); |
2026 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
2027 | hlist_for_each_entry(entry, |
2028 | &priv->lec_arp_tables[i], next) { |
2029 | if (memcmp |
2030 | (ioc_data->atm_addr, entry->atm_addr, |
2031 | ATM_ESA_LEN) == 0) { |
2032 | pr_debug("LEC_ARP: Attaching data direct\n"); |
2033 | pr_debug("Currently -> Vcc: %d, Rvcc:%d\n", |
2034 | entry->vcc ? entry->vcc->vci : 0, |
2035 | entry->recv_vcc ? entry->recv_vcc-> |
2036 | vci : 0); |
2037 | found_entry = 1; |
2038 | del_timer(&entry->timer); |
2039 | entry->vcc = vcc; |
2040 | entry->old_push = old_push; |
2041 | if (entry->status == ESI_VC_PENDING) { |
2042 | if (priv->maximum_unknown_frame_count |
2043 | == 0) |
2044 | entry->status = |
2045 | ESI_FORWARD_DIRECT; |
2046 | else { |
2047 | entry->timestamp = jiffies; |
2048 | entry->status = |
2049 | ESI_FLUSH_PENDING; |
2050 | #if 0 |
2051 | send_to_lecd(priv, l_flush_xmt, |
2052 | NULL, |
2053 | entry->atm_addr, |
2054 | NULL); |
2055 | #endif |
2056 | } |
2057 | } else { |
2058 | /* |
2059 | * They were forming a connection |
2060 | * to us, and we to them. Our |
2061 | * ATM address is numerically lower |
2062 | * than theirs, so we make connection |
2063 | * we formed into default VCC (8.1.11). |
2064 | * Connection they made gets torn |
2065 | * down. This might confuse some |
2066 | * clients. Can be changed if |
2067 | * someone reports trouble... |
2068 | */ |
2069 | ; |
2070 | } |
2071 | } |
2072 | } |
2073 | } |
2074 | if (found_entry) { |
2075 | pr_debug("After vcc was added\n"); |
2076 | dump_arp_table(priv); |
2077 | goto out; |
2078 | } |
2079 | /* |
2080 | * Not found, snatch address from first data packet that arrives |
2081 | * from this vcc |
2082 | */ |
2083 | entry = make_entry(priv, bus_mac); |
2084 | if (!entry) |
2085 | goto out; |
2086 | entry->vcc = vcc; |
2087 | entry->old_push = old_push; |
2088 | memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); |
2089 | memset(entry->mac_addr, 0, ETH_ALEN); |
2090 | entry->status = ESI_UNKNOWN; |
2091 | hlist_add_head(&entry->next, &priv->lec_arp_empty_ones); |
2092 | entry->timer.expires = jiffies + priv->vcc_timeout_period; |
2093 | entry->timer.function = lec_arp_expire_vcc; |
2094 | add_timer(&entry->timer); |
2095 | pr_debug("After vcc was added\n"); |
2096 | dump_arp_table(priv); |
2097 | out: |
2098 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
2099 | } |
2100 | |
2101 | static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id) |
2102 | { |
2103 | unsigned long flags; |
2104 | struct lec_arp_table *entry; |
2105 | int i; |
2106 | |
2107 | pr_debug("%lx\n", tran_id); |
2108 | restart: |
2109 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
2110 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
2111 | hlist_for_each_entry(entry, |
2112 | &priv->lec_arp_tables[i], next) { |
2113 | if (entry->flush_tran_id == tran_id && |
2114 | entry->status == ESI_FLUSH_PENDING) { |
2115 | struct sk_buff *skb; |
2116 | struct atm_vcc *vcc = entry->vcc; |
2117 | |
2118 | lec_arp_hold(entry); |
2119 | spin_unlock_irqrestore(&priv->lec_arp_lock, |
2120 | flags); |
2121 | while ((skb = skb_dequeue(&entry->tx_wait))) |
2122 | lec_send(vcc, skb); |
2123 | entry->last_used = jiffies; |
2124 | entry->status = ESI_FORWARD_DIRECT; |
2125 | lec_arp_put(entry); |
2126 | pr_debug("LEC_ARP: Flushed\n"); |
2127 | goto restart; |
2128 | } |
2129 | } |
2130 | } |
2131 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
2132 | dump_arp_table(priv); |
2133 | } |
2134 | |
2135 | static void |
2136 | lec_set_flush_tran_id(struct lec_priv *priv, |
2137 | const unsigned char *atm_addr, unsigned long tran_id) |
2138 | { |
2139 | unsigned long flags; |
2140 | struct lec_arp_table *entry; |
2141 | int i; |
2142 | |
2143 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
2144 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) |
2145 | hlist_for_each_entry(entry, |
2146 | &priv->lec_arp_tables[i], next) { |
2147 | if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) { |
2148 | entry->flush_tran_id = tran_id; |
2149 | pr_debug("Set flush transaction id to %lx for %p\n", |
2150 | tran_id, entry); |
2151 | } |
2152 | } |
2153 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
2154 | } |
2155 | |
2156 | static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc) |
2157 | { |
2158 | unsigned long flags; |
2159 | unsigned char mac_addr[] = { |
2160 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff |
2161 | }; |
2162 | struct lec_arp_table *to_add; |
2163 | struct lec_vcc_priv *vpriv; |
2164 | int err = 0; |
2165 | |
2166 | vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL); |
2167 | if (!vpriv) |
2168 | return -ENOMEM; |
2169 | vpriv->xoff = 0; |
2170 | vpriv->old_pop = vcc->pop; |
2171 | vcc->user_back = vpriv; |
2172 | vcc->pop = lec_pop; |
2173 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
2174 | to_add = make_entry(priv, mac_addr); |
2175 | if (!to_add) { |
2176 | vcc->pop = vpriv->old_pop; |
2177 | kfree(vpriv); |
2178 | err = -ENOMEM; |
2179 | goto out; |
2180 | } |
2181 | memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN); |
2182 | to_add->status = ESI_FORWARD_DIRECT; |
2183 | to_add->flags |= LEC_PERMANENT_FLAG; |
2184 | to_add->vcc = vcc; |
2185 | to_add->old_push = vcc->push; |
2186 | vcc->push = lec_push; |
2187 | priv->mcast_vcc = vcc; |
2188 | lec_arp_add(priv, to_add); |
2189 | out: |
2190 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
2191 | return err; |
2192 | } |
2193 | |
2194 | static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc) |
2195 | { |
2196 | unsigned long flags; |
2197 | struct hlist_node *next; |
2198 | struct lec_arp_table *entry; |
2199 | int i; |
2200 | |
2201 | pr_debug("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n", vcc->vpi, vcc->vci); |
2202 | dump_arp_table(priv); |
2203 | |
2204 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
2205 | |
2206 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
2207 | hlist_for_each_entry_safe(entry, next, |
2208 | &priv->lec_arp_tables[i], next) { |
2209 | if (vcc == entry->vcc) { |
2210 | lec_arp_remove(priv, entry); |
2211 | lec_arp_put(entry); |
2212 | if (priv->mcast_vcc == vcc) |
2213 | priv->mcast_vcc = NULL; |
2214 | } |
2215 | } |
2216 | } |
2217 | |
2218 | hlist_for_each_entry_safe(entry, next, |
2219 | &priv->lec_arp_empty_ones, next) { |
2220 | if (entry->vcc == vcc) { |
2221 | lec_arp_clear_vccs(entry); |
2222 | del_timer(&entry->timer); |
2223 | hlist_del(&entry->next); |
2224 | lec_arp_put(entry); |
2225 | } |
2226 | } |
2227 | |
2228 | hlist_for_each_entry_safe(entry, next, |
2229 | &priv->lec_no_forward, next) { |
2230 | if (entry->recv_vcc == vcc) { |
2231 | lec_arp_clear_vccs(entry); |
2232 | del_timer(&entry->timer); |
2233 | hlist_del(&entry->next); |
2234 | lec_arp_put(entry); |
2235 | } |
2236 | } |
2237 | |
2238 | hlist_for_each_entry_safe(entry, next, &priv->mcast_fwds, next) { |
2239 | if (entry->recv_vcc == vcc) { |
2240 | lec_arp_clear_vccs(entry); |
2241 | /* No timer, LANEv2 7.1.20 and 2.3.5.3 */ |
2242 | hlist_del(&entry->next); |
2243 | lec_arp_put(entry); |
2244 | } |
2245 | } |
2246 | |
2247 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
2248 | dump_arp_table(priv); |
2249 | } |
2250 | |
2251 | static void |
2252 | lec_arp_check_empties(struct lec_priv *priv, |
2253 | struct atm_vcc *vcc, struct sk_buff *skb) |
2254 | { |
2255 | unsigned long flags; |
2256 | struct hlist_node *next; |
2257 | struct lec_arp_table *entry, *tmp; |
2258 | struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data; |
2259 | unsigned char *src = hdr->h_source; |
2260 | |
2261 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
2262 | hlist_for_each_entry_safe(entry, next, |
2263 | &priv->lec_arp_empty_ones, next) { |
2264 | if (vcc == entry->vcc) { |
2265 | del_timer(&entry->timer); |
2266 | memcpy(entry->mac_addr, src, ETH_ALEN); |
2267 | entry->status = ESI_FORWARD_DIRECT; |
2268 | entry->last_used = jiffies; |
2269 | /* We might have got an entry */ |
2270 | tmp = lec_arp_find(priv, src); |
2271 | if (tmp) { |
2272 | lec_arp_remove(priv, tmp); |
2273 | lec_arp_put(tmp); |
2274 | } |
2275 | hlist_del(&entry->next); |
2276 | lec_arp_add(priv, entry); |
2277 | goto out; |
2278 | } |
2279 | } |
2280 | pr_debug("LEC_ARP: Arp_check_empties: entry not found!\n"); |
2281 | out: |
2282 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
2283 | } |
2284 | |
2285 | MODULE_LICENSE("GPL"); |
2286 |
Branches:
ben-wpan
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jz-2.6.34
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
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v3.9