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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 | /* TokenRing if needed */ |
30 | #ifdef CONFIG_TR |
31 | #include <linux/trdevice.h> |
32 | #endif |
33 | |
34 | /* And atm device */ |
35 | #include <linux/atmdev.h> |
36 | #include <linux/atmlec.h> |
37 | |
38 | /* Proxy LEC knows about bridging */ |
39 | #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) |
40 | #include "../bridge/br_private.h" |
41 | |
42 | static unsigned char bridge_ula_lec[] = { 0x01, 0x80, 0xc2, 0x00, 0x00 }; |
43 | #endif |
44 | |
45 | /* Modular too */ |
46 | #include <linux/module.h> |
47 | #include <linux/init.h> |
48 | |
49 | #include "lec.h" |
50 | #include "lec_arpc.h" |
51 | #include "resources.h" |
52 | |
53 | #define DUMP_PACKETS 0 /* |
54 | * 0 = None, |
55 | * 1 = 30 first bytes |
56 | * 2 = Whole packet |
57 | */ |
58 | |
59 | #define LEC_UNRES_QUE_LEN 8 /* |
60 | * number of tx packets to queue for a |
61 | * single destination while waiting for SVC |
62 | */ |
63 | |
64 | static int lec_open(struct net_device *dev); |
65 | static netdev_tx_t lec_start_xmit(struct sk_buff *skb, |
66 | struct net_device *dev); |
67 | static int lec_close(struct net_device *dev); |
68 | static struct lec_arp_table *lec_arp_find(struct lec_priv *priv, |
69 | const unsigned char *mac_addr); |
70 | static int lec_arp_remove(struct lec_priv *priv, |
71 | struct lec_arp_table *to_remove); |
72 | /* LANE2 functions */ |
73 | static void lane2_associate_ind(struct net_device *dev, const u8 *mac_address, |
74 | const u8 *tlvs, u32 sizeoftlvs); |
75 | static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force, |
76 | u8 **tlvs, u32 *sizeoftlvs); |
77 | static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst, |
78 | const u8 *tlvs, u32 sizeoftlvs); |
79 | |
80 | static int lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr, |
81 | unsigned long permanent); |
82 | static void lec_arp_check_empties(struct lec_priv *priv, |
83 | struct atm_vcc *vcc, struct sk_buff *skb); |
84 | static void lec_arp_destroy(struct lec_priv *priv); |
85 | static void lec_arp_init(struct lec_priv *priv); |
86 | static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv, |
87 | const unsigned char *mac_to_find, |
88 | int is_rdesc, |
89 | struct lec_arp_table **ret_entry); |
90 | static void lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr, |
91 | const unsigned char *atm_addr, |
92 | unsigned long remoteflag, |
93 | unsigned int targetless_le_arp); |
94 | static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id); |
95 | static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc); |
96 | static void lec_set_flush_tran_id(struct lec_priv *priv, |
97 | const unsigned char *atm_addr, |
98 | unsigned long tran_id); |
99 | static void lec_vcc_added(struct lec_priv *priv, |
100 | const struct atmlec_ioc *ioc_data, |
101 | struct atm_vcc *vcc, |
102 | void (*old_push)(struct atm_vcc *vcc, |
103 | struct sk_buff *skb)); |
104 | static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc); |
105 | |
106 | /* must be done under lec_arp_lock */ |
107 | static inline void lec_arp_hold(struct lec_arp_table *entry) |
108 | { |
109 | atomic_inc(&entry->usage); |
110 | } |
111 | |
112 | static inline void lec_arp_put(struct lec_arp_table *entry) |
113 | { |
114 | if (atomic_dec_and_test(&entry->usage)) |
115 | kfree(entry); |
116 | } |
117 | |
118 | static struct lane2_ops lane2_ops = { |
119 | lane2_resolve, /* resolve, spec 3.1.3 */ |
120 | lane2_associate_req, /* associate_req, spec 3.1.4 */ |
121 | NULL /* associate indicator, spec 3.1.5 */ |
122 | }; |
123 | |
124 | static unsigned char bus_mac[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; |
125 | |
126 | /* Device structures */ |
127 | static struct net_device *dev_lec[MAX_LEC_ITF]; |
128 | |
129 | #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) |
130 | static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev) |
131 | { |
132 | struct ethhdr *eth; |
133 | char *buff; |
134 | struct lec_priv *priv; |
135 | |
136 | /* |
137 | * Check if this is a BPDU. If so, ask zeppelin to send |
138 | * LE_TOPOLOGY_REQUEST with the same value of Topology Change bit |
139 | * as the Config BPDU has |
140 | */ |
141 | eth = (struct ethhdr *)skb->data; |
142 | buff = skb->data + skb->dev->hard_header_len; |
143 | if (*buff++ == 0x42 && *buff++ == 0x42 && *buff++ == 0x03) { |
144 | struct sock *sk; |
145 | struct sk_buff *skb2; |
146 | struct atmlec_msg *mesg; |
147 | |
148 | skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC); |
149 | if (skb2 == NULL) |
150 | return; |
151 | skb2->len = sizeof(struct atmlec_msg); |
152 | mesg = (struct atmlec_msg *)skb2->data; |
153 | mesg->type = l_topology_change; |
154 | buff += 4; |
155 | mesg->content.normal.flag = *buff & 0x01; |
156 | /* 0x01 is topology change */ |
157 | |
158 | priv = netdev_priv(dev); |
159 | atm_force_charge(priv->lecd, skb2->truesize); |
160 | sk = sk_atm(priv->lecd); |
161 | skb_queue_tail(&sk->sk_receive_queue, skb2); |
162 | sk->sk_data_ready(sk, skb2->len); |
163 | } |
164 | |
165 | return; |
166 | } |
167 | #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */ |
168 | |
169 | /* |
170 | * Modelled after tr_type_trans |
171 | * All multicast and ARE or STE frames go to BUS. |
172 | * Non source routed frames go by destination address. |
173 | * Last hop source routed frames go by destination address. |
174 | * Not last hop source routed frames go by _next_ route descriptor. |
175 | * Returns pointer to destination MAC address or fills in rdesc |
176 | * and returns NULL. |
177 | */ |
178 | #ifdef CONFIG_TR |
179 | static unsigned char *get_tr_dst(unsigned char *packet, unsigned char *rdesc) |
180 | { |
181 | struct trh_hdr *trh; |
182 | unsigned int riflen, num_rdsc; |
183 | |
184 | trh = (struct trh_hdr *)packet; |
185 | if (trh->daddr[0] & (uint8_t) 0x80) |
186 | return bus_mac; /* multicast */ |
187 | |
188 | if (trh->saddr[0] & TR_RII) { |
189 | riflen = (ntohs(trh->rcf) & TR_RCF_LEN_MASK) >> 8; |
190 | if ((ntohs(trh->rcf) >> 13) != 0) |
191 | return bus_mac; /* ARE or STE */ |
192 | } else |
193 | return trh->daddr; /* not source routed */ |
194 | |
195 | if (riflen < 6) |
196 | return trh->daddr; /* last hop, source routed */ |
197 | |
198 | /* riflen is 6 or more, packet has more than one route descriptor */ |
199 | num_rdsc = (riflen / 2) - 1; |
200 | memset(rdesc, 0, ETH_ALEN); |
201 | /* offset 4 comes from LAN destination field in LE control frames */ |
202 | if (trh->rcf & htons((uint16_t) TR_RCF_DIR_BIT)) |
203 | memcpy(&rdesc[4], &trh->rseg[num_rdsc - 2], sizeof(__be16)); |
204 | else { |
205 | memcpy(&rdesc[4], &trh->rseg[1], sizeof(__be16)); |
206 | rdesc[5] = ((ntohs(trh->rseg[0]) & 0x000f) | (rdesc[5] & 0xf0)); |
207 | } |
208 | |
209 | return NULL; |
210 | } |
211 | #endif /* CONFIG_TR */ |
212 | |
213 | /* |
214 | * Open/initialize the netdevice. This is called (in the current kernel) |
215 | * sometime after booting when the 'ifconfig' program is run. |
216 | * |
217 | * This routine should set everything up anew at each open, even |
218 | * registers that "should" only need to be set once at boot, so that |
219 | * there is non-reboot way to recover if something goes wrong. |
220 | */ |
221 | |
222 | static int lec_open(struct net_device *dev) |
223 | { |
224 | netif_start_queue(dev); |
225 | memset(&dev->stats, 0, sizeof(struct net_device_stats)); |
226 | |
227 | return 0; |
228 | } |
229 | |
230 | static void |
231 | lec_send(struct atm_vcc *vcc, struct sk_buff *skb) |
232 | { |
233 | struct net_device *dev = skb->dev; |
234 | |
235 | ATM_SKB(skb)->vcc = vcc; |
236 | ATM_SKB(skb)->atm_options = vcc->atm_options; |
237 | |
238 | atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); |
239 | if (vcc->send(vcc, skb) < 0) { |
240 | dev->stats.tx_dropped++; |
241 | return; |
242 | } |
243 | |
244 | dev->stats.tx_packets++; |
245 | dev->stats.tx_bytes += skb->len; |
246 | } |
247 | |
248 | static void lec_tx_timeout(struct net_device *dev) |
249 | { |
250 | pr_info("%s\n", dev->name); |
251 | dev->trans_start = jiffies; |
252 | netif_wake_queue(dev); |
253 | } |
254 | |
255 | static netdev_tx_t lec_start_xmit(struct sk_buff *skb, |
256 | struct net_device *dev) |
257 | { |
258 | struct sk_buff *skb2; |
259 | struct lec_priv *priv = netdev_priv(dev); |
260 | struct lecdatahdr_8023 *lec_h; |
261 | struct atm_vcc *vcc; |
262 | struct lec_arp_table *entry; |
263 | unsigned char *dst; |
264 | int min_frame_size; |
265 | #ifdef CONFIG_TR |
266 | unsigned char rdesc[ETH_ALEN]; /* Token Ring route descriptor */ |
267 | #endif |
268 | int is_rdesc; |
269 | |
270 | pr_debug("called\n"); |
271 | if (!priv->lecd) { |
272 | pr_info("%s:No lecd attached\n", dev->name); |
273 | dev->stats.tx_errors++; |
274 | netif_stop_queue(dev); |
275 | kfree_skb(skb); |
276 | return NETDEV_TX_OK; |
277 | } |
278 | |
279 | pr_debug("skbuff head:%lx data:%lx tail:%lx end:%lx\n", |
280 | (long)skb->head, (long)skb->data, (long)skb_tail_pointer(skb), |
281 | (long)skb_end_pointer(skb)); |
282 | #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) |
283 | if (memcmp(skb->data, bridge_ula_lec, sizeof(bridge_ula_lec)) == 0) |
284 | lec_handle_bridge(skb, dev); |
285 | #endif |
286 | |
287 | /* Make sure we have room for lec_id */ |
288 | if (skb_headroom(skb) < 2) { |
289 | pr_debug("reallocating skb\n"); |
290 | skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN); |
291 | kfree_skb(skb); |
292 | if (skb2 == NULL) |
293 | return NETDEV_TX_OK; |
294 | skb = skb2; |
295 | } |
296 | skb_push(skb, 2); |
297 | |
298 | /* Put le header to place, works for TokenRing too */ |
299 | lec_h = (struct lecdatahdr_8023 *)skb->data; |
300 | lec_h->le_header = htons(priv->lecid); |
301 | |
302 | #ifdef CONFIG_TR |
303 | /* |
304 | * Ugly. Use this to realign Token Ring packets for |
305 | * e.g. PCA-200E driver. |
306 | */ |
307 | if (priv->is_trdev) { |
308 | skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN); |
309 | kfree_skb(skb); |
310 | if (skb2 == NULL) |
311 | return NETDEV_TX_OK; |
312 | skb = skb2; |
313 | } |
314 | #endif |
315 | |
316 | #if DUMP_PACKETS >= 2 |
317 | #define MAX_DUMP_SKB 99 |
318 | #elif DUMP_PACKETS >= 1 |
319 | #define MAX_DUMP_SKB 30 |
320 | #endif |
321 | #if DUMP_PACKETS >= 1 |
322 | printk(KERN_DEBUG "%s: send datalen:%ld lecid:%4.4x\n", |
323 | dev->name, skb->len, priv->lecid); |
324 | print_hex_dump(KERN_DEBUG, "", DUMP_OFFSET, 16, 1, |
325 | skb->data, min(skb->len, MAX_DUMP_SKB), true); |
326 | #endif /* DUMP_PACKETS >= 1 */ |
327 | |
328 | /* Minimum ethernet-frame size */ |
329 | #ifdef CONFIG_TR |
330 | if (priv->is_trdev) |
331 | min_frame_size = LEC_MINIMUM_8025_SIZE; |
332 | else |
333 | #endif |
334 | min_frame_size = LEC_MINIMUM_8023_SIZE; |
335 | if (skb->len < min_frame_size) { |
336 | if ((skb->len + skb_tailroom(skb)) < min_frame_size) { |
337 | skb2 = skb_copy_expand(skb, 0, |
338 | min_frame_size - skb->truesize, |
339 | GFP_ATOMIC); |
340 | dev_kfree_skb(skb); |
341 | if (skb2 == NULL) { |
342 | dev->stats.tx_dropped++; |
343 | return NETDEV_TX_OK; |
344 | } |
345 | skb = skb2; |
346 | } |
347 | skb_put(skb, min_frame_size - skb->len); |
348 | } |
349 | |
350 | /* Send to right vcc */ |
351 | is_rdesc = 0; |
352 | dst = lec_h->h_dest; |
353 | #ifdef CONFIG_TR |
354 | if (priv->is_trdev) { |
355 | dst = get_tr_dst(skb->data + 2, rdesc); |
356 | if (dst == NULL) { |
357 | dst = rdesc; |
358 | is_rdesc = 1; |
359 | } |
360 | } |
361 | #endif |
362 | entry = NULL; |
363 | vcc = lec_arp_resolve(priv, dst, is_rdesc, &entry); |
364 | pr_debug("%s:vcc:%p vcc_flags:%lx, entry:%p\n", |
365 | dev->name, vcc, vcc ? vcc->flags : 0, entry); |
366 | if (!vcc || !test_bit(ATM_VF_READY, &vcc->flags)) { |
367 | if (entry && (entry->tx_wait.qlen < LEC_UNRES_QUE_LEN)) { |
368 | pr_debug("%s:queuing packet, MAC address %pM\n", |
369 | dev->name, lec_h->h_dest); |
370 | skb_queue_tail(&entry->tx_wait, skb); |
371 | } else { |
372 | pr_debug("%s:tx queue full or no arp entry, dropping, MAC address: %pM\n", |
373 | dev->name, lec_h->h_dest); |
374 | dev->stats.tx_dropped++; |
375 | dev_kfree_skb(skb); |
376 | } |
377 | goto out; |
378 | } |
379 | #if DUMP_PACKETS > 0 |
380 | printk(KERN_DEBUG "%s:sending to vpi:%d vci:%d\n", |
381 | dev->name, vcc->vpi, vcc->vci); |
382 | #endif /* DUMP_PACKETS > 0 */ |
383 | |
384 | while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) { |
385 | pr_debug("emptying tx queue, MAC address %pM\n", lec_h->h_dest); |
386 | lec_send(vcc, skb2); |
387 | } |
388 | |
389 | lec_send(vcc, skb); |
390 | |
391 | if (!atm_may_send(vcc, 0)) { |
392 | struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); |
393 | |
394 | vpriv->xoff = 1; |
395 | netif_stop_queue(dev); |
396 | |
397 | /* |
398 | * vcc->pop() might have occurred in between, making |
399 | * the vcc usuable again. Since xmit is serialized, |
400 | * this is the only situation we have to re-test. |
401 | */ |
402 | |
403 | if (atm_may_send(vcc, 0)) |
404 | netif_wake_queue(dev); |
405 | } |
406 | |
407 | out: |
408 | if (entry) |
409 | lec_arp_put(entry); |
410 | dev->trans_start = jiffies; |
411 | return NETDEV_TX_OK; |
412 | } |
413 | |
414 | /* The inverse routine to net_open(). */ |
415 | static int lec_close(struct net_device *dev) |
416 | { |
417 | netif_stop_queue(dev); |
418 | return 0; |
419 | } |
420 | |
421 | static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb) |
422 | { |
423 | unsigned long flags; |
424 | struct net_device *dev = (struct net_device *)vcc->proto_data; |
425 | struct lec_priv *priv = netdev_priv(dev); |
426 | struct atmlec_msg *mesg; |
427 | struct lec_arp_table *entry; |
428 | int i; |
429 | char *tmp; /* FIXME */ |
430 | |
431 | atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); |
432 | mesg = (struct atmlec_msg *)skb->data; |
433 | tmp = skb->data; |
434 | tmp += sizeof(struct atmlec_msg); |
435 | pr_debug("%s: msg from zeppelin:%d\n", dev->name, mesg->type); |
436 | switch (mesg->type) { |
437 | case l_set_mac_addr: |
438 | for (i = 0; i < 6; i++) |
439 | dev->dev_addr[i] = mesg->content.normal.mac_addr[i]; |
440 | break; |
441 | case l_del_mac_addr: |
442 | for (i = 0; i < 6; i++) |
443 | dev->dev_addr[i] = 0; |
444 | break; |
445 | case l_addr_delete: |
446 | lec_addr_delete(priv, mesg->content.normal.atm_addr, |
447 | mesg->content.normal.flag); |
448 | break; |
449 | case l_topology_change: |
450 | priv->topology_change = mesg->content.normal.flag; |
451 | break; |
452 | case l_flush_complete: |
453 | lec_flush_complete(priv, mesg->content.normal.flag); |
454 | break; |
455 | case l_narp_req: /* LANE2: see 7.1.35 in the lane2 spec */ |
456 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
457 | entry = lec_arp_find(priv, mesg->content.normal.mac_addr); |
458 | lec_arp_remove(priv, entry); |
459 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
460 | |
461 | if (mesg->content.normal.no_source_le_narp) |
462 | break; |
463 | /* FALL THROUGH */ |
464 | case l_arp_update: |
465 | lec_arp_update(priv, mesg->content.normal.mac_addr, |
466 | mesg->content.normal.atm_addr, |
467 | mesg->content.normal.flag, |
468 | mesg->content.normal.targetless_le_arp); |
469 | pr_debug("in l_arp_update\n"); |
470 | if (mesg->sizeoftlvs != 0) { /* LANE2 3.1.5 */ |
471 | pr_debug("LANE2 3.1.5, got tlvs, size %d\n", |
472 | mesg->sizeoftlvs); |
473 | lane2_associate_ind(dev, mesg->content.normal.mac_addr, |
474 | tmp, mesg->sizeoftlvs); |
475 | } |
476 | break; |
477 | case l_config: |
478 | priv->maximum_unknown_frame_count = |
479 | mesg->content.config.maximum_unknown_frame_count; |
480 | priv->max_unknown_frame_time = |
481 | (mesg->content.config.max_unknown_frame_time * HZ); |
482 | priv->max_retry_count = mesg->content.config.max_retry_count; |
483 | priv->aging_time = (mesg->content.config.aging_time * HZ); |
484 | priv->forward_delay_time = |
485 | (mesg->content.config.forward_delay_time * HZ); |
486 | priv->arp_response_time = |
487 | (mesg->content.config.arp_response_time * HZ); |
488 | priv->flush_timeout = (mesg->content.config.flush_timeout * HZ); |
489 | priv->path_switching_delay = |
490 | (mesg->content.config.path_switching_delay * HZ); |
491 | priv->lane_version = mesg->content.config.lane_version; |
492 | /* LANE2 */ |
493 | priv->lane2_ops = NULL; |
494 | if (priv->lane_version > 1) |
495 | priv->lane2_ops = &lane2_ops; |
496 | if (dev_set_mtu(dev, mesg->content.config.mtu)) |
497 | pr_info("%s: change_mtu to %d failed\n", |
498 | dev->name, mesg->content.config.mtu); |
499 | priv->is_proxy = mesg->content.config.is_proxy; |
500 | break; |
501 | case l_flush_tran_id: |
502 | lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr, |
503 | mesg->content.normal.flag); |
504 | break; |
505 | case l_set_lecid: |
506 | priv->lecid = |
507 | (unsigned short)(0xffff & mesg->content.normal.flag); |
508 | break; |
509 | case l_should_bridge: |
510 | #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) |
511 | { |
512 | pr_debug("%s: bridge zeppelin asks about %pM\n", |
513 | dev->name, mesg->content.proxy.mac_addr); |
514 | |
515 | if (br_fdb_test_addr_hook == NULL) |
516 | break; |
517 | |
518 | if (br_fdb_test_addr_hook(dev, mesg->content.proxy.mac_addr)) { |
519 | /* hit from bridge table, send LE_ARP_RESPONSE */ |
520 | struct sk_buff *skb2; |
521 | struct sock *sk; |
522 | |
523 | pr_debug("%s: entry found, responding to zeppelin\n", |
524 | dev->name); |
525 | skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC); |
526 | if (skb2 == NULL) |
527 | break; |
528 | skb2->len = sizeof(struct atmlec_msg); |
529 | skb_copy_to_linear_data(skb2, mesg, sizeof(*mesg)); |
530 | atm_force_charge(priv->lecd, skb2->truesize); |
531 | sk = sk_atm(priv->lecd); |
532 | skb_queue_tail(&sk->sk_receive_queue, skb2); |
533 | sk->sk_data_ready(sk, skb2->len); |
534 | } |
535 | } |
536 | #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */ |
537 | break; |
538 | default: |
539 | pr_info("%s: Unknown message type %d\n", dev->name, mesg->type); |
540 | dev_kfree_skb(skb); |
541 | return -EINVAL; |
542 | } |
543 | dev_kfree_skb(skb); |
544 | return 0; |
545 | } |
546 | |
547 | static void lec_atm_close(struct atm_vcc *vcc) |
548 | { |
549 | struct sk_buff *skb; |
550 | struct net_device *dev = (struct net_device *)vcc->proto_data; |
551 | struct lec_priv *priv = netdev_priv(dev); |
552 | |
553 | priv->lecd = NULL; |
554 | /* Do something needful? */ |
555 | |
556 | netif_stop_queue(dev); |
557 | lec_arp_destroy(priv); |
558 | |
559 | if (skb_peek(&sk_atm(vcc)->sk_receive_queue)) |
560 | pr_info("%s closing with messages pending\n", dev->name); |
561 | while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue))) { |
562 | atm_return(vcc, skb->truesize); |
563 | dev_kfree_skb(skb); |
564 | } |
565 | |
566 | pr_info("%s: Shut down!\n", dev->name); |
567 | module_put(THIS_MODULE); |
568 | } |
569 | |
570 | static struct atmdev_ops lecdev_ops = { |
571 | .close = lec_atm_close, |
572 | .send = lec_atm_send |
573 | }; |
574 | |
575 | static struct atm_dev lecatm_dev = { |
576 | .ops = &lecdev_ops, |
577 | .type = "lec", |
578 | .number = 999, /* dummy device number */ |
579 | .lock = __SPIN_LOCK_UNLOCKED(lecatm_dev.lock) |
580 | }; |
581 | |
582 | /* |
583 | * LANE2: new argument struct sk_buff *data contains |
584 | * the LE_ARP based TLVs introduced in the LANE2 spec |
585 | */ |
586 | static int |
587 | send_to_lecd(struct lec_priv *priv, atmlec_msg_type type, |
588 | const unsigned char *mac_addr, const unsigned char *atm_addr, |
589 | struct sk_buff *data) |
590 | { |
591 | struct sock *sk; |
592 | struct sk_buff *skb; |
593 | struct atmlec_msg *mesg; |
594 | |
595 | if (!priv || !priv->lecd) |
596 | return -1; |
597 | skb = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC); |
598 | if (!skb) |
599 | return -1; |
600 | skb->len = sizeof(struct atmlec_msg); |
601 | mesg = (struct atmlec_msg *)skb->data; |
602 | memset(mesg, 0, sizeof(struct atmlec_msg)); |
603 | mesg->type = type; |
604 | if (data != NULL) |
605 | mesg->sizeoftlvs = data->len; |
606 | if (mac_addr) |
607 | memcpy(&mesg->content.normal.mac_addr, mac_addr, ETH_ALEN); |
608 | else |
609 | mesg->content.normal.targetless_le_arp = 1; |
610 | if (atm_addr) |
611 | memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN); |
612 | |
613 | atm_force_charge(priv->lecd, skb->truesize); |
614 | sk = sk_atm(priv->lecd); |
615 | skb_queue_tail(&sk->sk_receive_queue, skb); |
616 | sk->sk_data_ready(sk, skb->len); |
617 | |
618 | if (data != NULL) { |
619 | pr_debug("about to send %d bytes of data\n", data->len); |
620 | atm_force_charge(priv->lecd, data->truesize); |
621 | skb_queue_tail(&sk->sk_receive_queue, data); |
622 | sk->sk_data_ready(sk, skb->len); |
623 | } |
624 | |
625 | return 0; |
626 | } |
627 | |
628 | /* shamelessly stolen from drivers/net/net_init.c */ |
629 | static int lec_change_mtu(struct net_device *dev, int new_mtu) |
630 | { |
631 | if ((new_mtu < 68) || (new_mtu > 18190)) |
632 | return -EINVAL; |
633 | dev->mtu = new_mtu; |
634 | return 0; |
635 | } |
636 | |
637 | static void lec_set_multicast_list(struct net_device *dev) |
638 | { |
639 | /* |
640 | * by default, all multicast frames arrive over the bus. |
641 | * eventually support selective multicast service |
642 | */ |
643 | return; |
644 | } |
645 | |
646 | static const struct net_device_ops lec_netdev_ops = { |
647 | .ndo_open = lec_open, |
648 | .ndo_stop = lec_close, |
649 | .ndo_start_xmit = lec_start_xmit, |
650 | .ndo_change_mtu = lec_change_mtu, |
651 | .ndo_tx_timeout = lec_tx_timeout, |
652 | .ndo_set_multicast_list = lec_set_multicast_list, |
653 | }; |
654 | |
655 | static const unsigned char lec_ctrl_magic[] = { |
656 | 0xff, |
657 | 0x00, |
658 | 0x01, |
659 | 0x01 |
660 | }; |
661 | |
662 | #define LEC_DATA_DIRECT_8023 2 |
663 | #define LEC_DATA_DIRECT_8025 3 |
664 | |
665 | static int lec_is_data_direct(struct atm_vcc *vcc) |
666 | { |
667 | return ((vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8023) || |
668 | (vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8025)); |
669 | } |
670 | |
671 | static void lec_push(struct atm_vcc *vcc, struct sk_buff *skb) |
672 | { |
673 | unsigned long flags; |
674 | struct net_device *dev = (struct net_device *)vcc->proto_data; |
675 | struct lec_priv *priv = netdev_priv(dev); |
676 | |
677 | #if DUMP_PACKETS > 0 |
678 | printk(KERN_DEBUG "%s: vcc vpi:%d vci:%d\n", |
679 | dev->name, vcc->vpi, vcc->vci); |
680 | #endif |
681 | if (!skb) { |
682 | pr_debug("%s: null skb\n", dev->name); |
683 | lec_vcc_close(priv, vcc); |
684 | return; |
685 | } |
686 | #if DUMP_PACKETS >= 2 |
687 | #define MAX_SKB_DUMP 99 |
688 | #elif DUMP_PACKETS >= 1 |
689 | #define MAX_SKB_DUMP 30 |
690 | #endif |
691 | #if DUMP_PACKETS > 0 |
692 | printk(KERN_DEBUG "%s: rcv datalen:%ld lecid:%4.4x\n", |
693 | dev->name, skb->len, priv->lecid); |
694 | print_hex_dump(KERN_DEBUG, "", DUMP_OFFSET, 16, 1, |
695 | skb->data, min(MAX_SKB_DUMP, skb->len), true); |
696 | #endif /* DUMP_PACKETS > 0 */ |
697 | if (memcmp(skb->data, lec_ctrl_magic, 4) == 0) { |
698 | /* Control frame, to daemon */ |
699 | struct sock *sk = sk_atm(vcc); |
700 | |
701 | pr_debug("%s: To daemon\n", dev->name); |
702 | skb_queue_tail(&sk->sk_receive_queue, skb); |
703 | sk->sk_data_ready(sk, skb->len); |
704 | } else { /* Data frame, queue to protocol handlers */ |
705 | struct lec_arp_table *entry; |
706 | unsigned char *src, *dst; |
707 | |
708 | atm_return(vcc, skb->truesize); |
709 | if (*(__be16 *) skb->data == htons(priv->lecid) || |
710 | !priv->lecd || !(dev->flags & IFF_UP)) { |
711 | /* |
712 | * Probably looping back, or if lecd is missing, |
713 | * lecd has gone down |
714 | */ |
715 | pr_debug("Ignoring frame...\n"); |
716 | dev_kfree_skb(skb); |
717 | return; |
718 | } |
719 | #ifdef CONFIG_TR |
720 | if (priv->is_trdev) |
721 | dst = ((struct lecdatahdr_8025 *)skb->data)->h_dest; |
722 | else |
723 | #endif |
724 | dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest; |
725 | |
726 | /* |
727 | * If this is a Data Direct VCC, and the VCC does not match |
728 | * the LE_ARP cache entry, delete the LE_ARP cache entry. |
729 | */ |
730 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
731 | if (lec_is_data_direct(vcc)) { |
732 | #ifdef CONFIG_TR |
733 | if (priv->is_trdev) |
734 | src = |
735 | ((struct lecdatahdr_8025 *)skb->data)-> |
736 | h_source; |
737 | else |
738 | #endif |
739 | src = |
740 | ((struct lecdatahdr_8023 *)skb->data)-> |
741 | h_source; |
742 | entry = lec_arp_find(priv, src); |
743 | if (entry && entry->vcc != vcc) { |
744 | lec_arp_remove(priv, entry); |
745 | lec_arp_put(entry); |
746 | } |
747 | } |
748 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
749 | |
750 | if (!(dst[0] & 0x01) && /* Never filter Multi/Broadcast */ |
751 | !priv->is_proxy && /* Proxy wants all the packets */ |
752 | memcmp(dst, dev->dev_addr, dev->addr_len)) { |
753 | dev_kfree_skb(skb); |
754 | return; |
755 | } |
756 | if (!hlist_empty(&priv->lec_arp_empty_ones)) |
757 | lec_arp_check_empties(priv, vcc, skb); |
758 | skb_pull(skb, 2); /* skip lec_id */ |
759 | #ifdef CONFIG_TR |
760 | if (priv->is_trdev) |
761 | skb->protocol = tr_type_trans(skb, dev); |
762 | else |
763 | #endif |
764 | skb->protocol = eth_type_trans(skb, dev); |
765 | dev->stats.rx_packets++; |
766 | dev->stats.rx_bytes += skb->len; |
767 | memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data)); |
768 | netif_rx(skb); |
769 | } |
770 | } |
771 | |
772 | static void lec_pop(struct atm_vcc *vcc, struct sk_buff *skb) |
773 | { |
774 | struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); |
775 | struct net_device *dev = skb->dev; |
776 | |
777 | if (vpriv == NULL) { |
778 | pr_info("vpriv = NULL!?!?!?\n"); |
779 | return; |
780 | } |
781 | |
782 | vpriv->old_pop(vcc, skb); |
783 | |
784 | if (vpriv->xoff && atm_may_send(vcc, 0)) { |
785 | vpriv->xoff = 0; |
786 | if (netif_running(dev) && netif_queue_stopped(dev)) |
787 | netif_wake_queue(dev); |
788 | } |
789 | } |
790 | |
791 | static int lec_vcc_attach(struct atm_vcc *vcc, void __user *arg) |
792 | { |
793 | struct lec_vcc_priv *vpriv; |
794 | int bytes_left; |
795 | struct atmlec_ioc ioc_data; |
796 | |
797 | /* Lecd must be up in this case */ |
798 | bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc)); |
799 | if (bytes_left != 0) |
800 | pr_info("copy from user failed for %d bytes\n", bytes_left); |
801 | if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF || |
802 | !dev_lec[ioc_data.dev_num]) |
803 | return -EINVAL; |
804 | vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL); |
805 | if (!vpriv) |
806 | return -ENOMEM; |
807 | vpriv->xoff = 0; |
808 | vpriv->old_pop = vcc->pop; |
809 | vcc->user_back = vpriv; |
810 | vcc->pop = lec_pop; |
811 | lec_vcc_added(netdev_priv(dev_lec[ioc_data.dev_num]), |
812 | &ioc_data, vcc, vcc->push); |
813 | vcc->proto_data = dev_lec[ioc_data.dev_num]; |
814 | vcc->push = lec_push; |
815 | return 0; |
816 | } |
817 | |
818 | static int lec_mcast_attach(struct atm_vcc *vcc, int arg) |
819 | { |
820 | if (arg < 0 || arg >= MAX_LEC_ITF || !dev_lec[arg]) |
821 | return -EINVAL; |
822 | vcc->proto_data = dev_lec[arg]; |
823 | return lec_mcast_make((struct lec_priv *)netdev_priv(dev_lec[arg]), |
824 | vcc); |
825 | } |
826 | |
827 | /* Initialize device. */ |
828 | static int lecd_attach(struct atm_vcc *vcc, int arg) |
829 | { |
830 | int i; |
831 | struct lec_priv *priv; |
832 | |
833 | if (arg < 0) |
834 | i = 0; |
835 | else |
836 | i = arg; |
837 | #ifdef CONFIG_TR |
838 | if (arg >= MAX_LEC_ITF) |
839 | return -EINVAL; |
840 | #else /* Reserve the top NUM_TR_DEVS for TR */ |
841 | if (arg >= (MAX_LEC_ITF - NUM_TR_DEVS)) |
842 | return -EINVAL; |
843 | #endif |
844 | if (!dev_lec[i]) { |
845 | int is_trdev, size; |
846 | |
847 | is_trdev = 0; |
848 | if (i >= (MAX_LEC_ITF - NUM_TR_DEVS)) |
849 | is_trdev = 1; |
850 | |
851 | size = sizeof(struct lec_priv); |
852 | #ifdef CONFIG_TR |
853 | if (is_trdev) |
854 | dev_lec[i] = alloc_trdev(size); |
855 | else |
856 | #endif |
857 | dev_lec[i] = alloc_etherdev(size); |
858 | if (!dev_lec[i]) |
859 | return -ENOMEM; |
860 | dev_lec[i]->netdev_ops = &lec_netdev_ops; |
861 | snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i); |
862 | if (register_netdev(dev_lec[i])) { |
863 | free_netdev(dev_lec[i]); |
864 | return -EINVAL; |
865 | } |
866 | |
867 | priv = netdev_priv(dev_lec[i]); |
868 | priv->is_trdev = is_trdev; |
869 | } else { |
870 | priv = netdev_priv(dev_lec[i]); |
871 | if (priv->lecd) |
872 | return -EADDRINUSE; |
873 | } |
874 | lec_arp_init(priv); |
875 | priv->itfnum = i; /* LANE2 addition */ |
876 | priv->lecd = vcc; |
877 | vcc->dev = &lecatm_dev; |
878 | vcc_insert_socket(sk_atm(vcc)); |
879 | |
880 | vcc->proto_data = dev_lec[i]; |
881 | set_bit(ATM_VF_META, &vcc->flags); |
882 | set_bit(ATM_VF_READY, &vcc->flags); |
883 | |
884 | /* Set default values to these variables */ |
885 | priv->maximum_unknown_frame_count = 1; |
886 | priv->max_unknown_frame_time = (1 * HZ); |
887 | priv->vcc_timeout_period = (1200 * HZ); |
888 | priv->max_retry_count = 1; |
889 | priv->aging_time = (300 * HZ); |
890 | priv->forward_delay_time = (15 * HZ); |
891 | priv->topology_change = 0; |
892 | priv->arp_response_time = (1 * HZ); |
893 | priv->flush_timeout = (4 * HZ); |
894 | priv->path_switching_delay = (6 * HZ); |
895 | |
896 | if (dev_lec[i]->flags & IFF_UP) |
897 | netif_start_queue(dev_lec[i]); |
898 | __module_get(THIS_MODULE); |
899 | return i; |
900 | } |
901 | |
902 | #ifdef CONFIG_PROC_FS |
903 | static const char *lec_arp_get_status_string(unsigned char status) |
904 | { |
905 | static const char *const lec_arp_status_string[] = { |
906 | "ESI_UNKNOWN ", |
907 | "ESI_ARP_PENDING ", |
908 | "ESI_VC_PENDING ", |
909 | "<Undefined> ", |
910 | "ESI_FLUSH_PENDING ", |
911 | "ESI_FORWARD_DIRECT" |
912 | }; |
913 | |
914 | if (status > ESI_FORWARD_DIRECT) |
915 | status = 3; /* ESI_UNDEFINED */ |
916 | return lec_arp_status_string[status]; |
917 | } |
918 | |
919 | static void lec_info(struct seq_file *seq, struct lec_arp_table *entry) |
920 | { |
921 | int i; |
922 | |
923 | for (i = 0; i < ETH_ALEN; i++) |
924 | seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff); |
925 | seq_printf(seq, " "); |
926 | for (i = 0; i < ATM_ESA_LEN; i++) |
927 | seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff); |
928 | seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status), |
929 | entry->flags & 0xffff); |
930 | if (entry->vcc) |
931 | seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci); |
932 | else |
933 | seq_printf(seq, " "); |
934 | if (entry->recv_vcc) { |
935 | seq_printf(seq, " %3d %3d", entry->recv_vcc->vpi, |
936 | entry->recv_vcc->vci); |
937 | } |
938 | seq_putc(seq, '\n'); |
939 | } |
940 | |
941 | struct lec_state { |
942 | unsigned long flags; |
943 | struct lec_priv *locked; |
944 | struct hlist_node *node; |
945 | struct net_device *dev; |
946 | int itf; |
947 | int arp_table; |
948 | int misc_table; |
949 | }; |
950 | |
951 | static void *lec_tbl_walk(struct lec_state *state, struct hlist_head *tbl, |
952 | loff_t *l) |
953 | { |
954 | struct hlist_node *e = state->node; |
955 | struct lec_arp_table *tmp; |
956 | |
957 | if (!e) |
958 | e = tbl->first; |
959 | if (e == SEQ_START_TOKEN) { |
960 | e = tbl->first; |
961 | --*l; |
962 | } |
963 | |
964 | hlist_for_each_entry_from(tmp, e, next) { |
965 | if (--*l < 0) |
966 | break; |
967 | } |
968 | state->node = e; |
969 | |
970 | return (*l < 0) ? state : NULL; |
971 | } |
972 | |
973 | static void *lec_arp_walk(struct lec_state *state, loff_t *l, |
974 | struct lec_priv *priv) |
975 | { |
976 | void *v = NULL; |
977 | int p; |
978 | |
979 | for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) { |
980 | v = lec_tbl_walk(state, &priv->lec_arp_tables[p], l); |
981 | if (v) |
982 | break; |
983 | } |
984 | state->arp_table = p; |
985 | return v; |
986 | } |
987 | |
988 | static void *lec_misc_walk(struct lec_state *state, loff_t *l, |
989 | struct lec_priv *priv) |
990 | { |
991 | struct hlist_head *lec_misc_tables[] = { |
992 | &priv->lec_arp_empty_ones, |
993 | &priv->lec_no_forward, |
994 | &priv->mcast_fwds |
995 | }; |
996 | void *v = NULL; |
997 | int q; |
998 | |
999 | for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) { |
1000 | v = lec_tbl_walk(state, lec_misc_tables[q], l); |
1001 | if (v) |
1002 | break; |
1003 | } |
1004 | state->misc_table = q; |
1005 | return v; |
1006 | } |
1007 | |
1008 | static void *lec_priv_walk(struct lec_state *state, loff_t *l, |
1009 | struct lec_priv *priv) |
1010 | { |
1011 | if (!state->locked) { |
1012 | state->locked = priv; |
1013 | spin_lock_irqsave(&priv->lec_arp_lock, state->flags); |
1014 | } |
1015 | if (!lec_arp_walk(state, l, priv) && !lec_misc_walk(state, l, priv)) { |
1016 | spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags); |
1017 | state->locked = NULL; |
1018 | /* Partial state reset for the next time we get called */ |
1019 | state->arp_table = state->misc_table = 0; |
1020 | } |
1021 | return state->locked; |
1022 | } |
1023 | |
1024 | static void *lec_itf_walk(struct lec_state *state, loff_t *l) |
1025 | { |
1026 | struct net_device *dev; |
1027 | void *v; |
1028 | |
1029 | dev = state->dev ? state->dev : dev_lec[state->itf]; |
1030 | v = (dev && netdev_priv(dev)) ? |
1031 | lec_priv_walk(state, l, netdev_priv(dev)) : NULL; |
1032 | if (!v && dev) { |
1033 | dev_put(dev); |
1034 | /* Partial state reset for the next time we get called */ |
1035 | dev = NULL; |
1036 | } |
1037 | state->dev = dev; |
1038 | return v; |
1039 | } |
1040 | |
1041 | static void *lec_get_idx(struct lec_state *state, loff_t l) |
1042 | { |
1043 | void *v = NULL; |
1044 | |
1045 | for (; state->itf < MAX_LEC_ITF; state->itf++) { |
1046 | v = lec_itf_walk(state, &l); |
1047 | if (v) |
1048 | break; |
1049 | } |
1050 | return v; |
1051 | } |
1052 | |
1053 | static void *lec_seq_start(struct seq_file *seq, loff_t *pos) |
1054 | { |
1055 | struct lec_state *state = seq->private; |
1056 | |
1057 | state->itf = 0; |
1058 | state->dev = NULL; |
1059 | state->locked = NULL; |
1060 | state->arp_table = 0; |
1061 | state->misc_table = 0; |
1062 | state->node = SEQ_START_TOKEN; |
1063 | |
1064 | return *pos ? lec_get_idx(state, *pos) : SEQ_START_TOKEN; |
1065 | } |
1066 | |
1067 | static void lec_seq_stop(struct seq_file *seq, void *v) |
1068 | { |
1069 | struct lec_state *state = seq->private; |
1070 | |
1071 | if (state->dev) { |
1072 | spin_unlock_irqrestore(&state->locked->lec_arp_lock, |
1073 | state->flags); |
1074 | dev_put(state->dev); |
1075 | } |
1076 | } |
1077 | |
1078 | static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
1079 | { |
1080 | struct lec_state *state = seq->private; |
1081 | |
1082 | v = lec_get_idx(state, 1); |
1083 | *pos += !!PTR_ERR(v); |
1084 | return v; |
1085 | } |
1086 | |
1087 | static int lec_seq_show(struct seq_file *seq, void *v) |
1088 | { |
1089 | static const char lec_banner[] = |
1090 | "Itf MAC ATM destination" |
1091 | " Status Flags " |
1092 | "VPI/VCI Recv VPI/VCI\n"; |
1093 | |
1094 | if (v == SEQ_START_TOKEN) |
1095 | seq_puts(seq, lec_banner); |
1096 | else { |
1097 | struct lec_state *state = seq->private; |
1098 | struct net_device *dev = state->dev; |
1099 | struct lec_arp_table *entry = hlist_entry(state->node, |
1100 | struct lec_arp_table, |
1101 | next); |
1102 | |
1103 | seq_printf(seq, "%s ", dev->name); |
1104 | lec_info(seq, entry); |
1105 | } |
1106 | return 0; |
1107 | } |
1108 | |
1109 | static const struct seq_operations lec_seq_ops = { |
1110 | .start = lec_seq_start, |
1111 | .next = lec_seq_next, |
1112 | .stop = lec_seq_stop, |
1113 | .show = lec_seq_show, |
1114 | }; |
1115 | |
1116 | static int lec_seq_open(struct inode *inode, struct file *file) |
1117 | { |
1118 | return seq_open_private(file, &lec_seq_ops, sizeof(struct lec_state)); |
1119 | } |
1120 | |
1121 | static const struct file_operations lec_seq_fops = { |
1122 | .owner = THIS_MODULE, |
1123 | .open = lec_seq_open, |
1124 | .read = seq_read, |
1125 | .llseek = seq_lseek, |
1126 | .release = seq_release_private, |
1127 | }; |
1128 | #endif |
1129 | |
1130 | static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
1131 | { |
1132 | struct atm_vcc *vcc = ATM_SD(sock); |
1133 | int err = 0; |
1134 | |
1135 | switch (cmd) { |
1136 | case ATMLEC_CTRL: |
1137 | case ATMLEC_MCAST: |
1138 | case ATMLEC_DATA: |
1139 | if (!capable(CAP_NET_ADMIN)) |
1140 | return -EPERM; |
1141 | break; |
1142 | default: |
1143 | return -ENOIOCTLCMD; |
1144 | } |
1145 | |
1146 | switch (cmd) { |
1147 | case ATMLEC_CTRL: |
1148 | err = lecd_attach(vcc, (int)arg); |
1149 | if (err >= 0) |
1150 | sock->state = SS_CONNECTED; |
1151 | break; |
1152 | case ATMLEC_MCAST: |
1153 | err = lec_mcast_attach(vcc, (int)arg); |
1154 | break; |
1155 | case ATMLEC_DATA: |
1156 | err = lec_vcc_attach(vcc, (void __user *)arg); |
1157 | break; |
1158 | } |
1159 | |
1160 | return err; |
1161 | } |
1162 | |
1163 | static struct atm_ioctl lane_ioctl_ops = { |
1164 | .owner = THIS_MODULE, |
1165 | .ioctl = lane_ioctl, |
1166 | }; |
1167 | |
1168 | static int __init lane_module_init(void) |
1169 | { |
1170 | #ifdef CONFIG_PROC_FS |
1171 | struct proc_dir_entry *p; |
1172 | |
1173 | p = proc_create("lec", S_IRUGO, atm_proc_root, &lec_seq_fops); |
1174 | if (!p) { |
1175 | pr_err("Unable to initialize /proc/net/atm/lec\n"); |
1176 | return -ENOMEM; |
1177 | } |
1178 | #endif |
1179 | |
1180 | register_atm_ioctl(&lane_ioctl_ops); |
1181 | pr_info("lec.c: " __DATE__ " " __TIME__ " initialized\n"); |
1182 | return 0; |
1183 | } |
1184 | |
1185 | static void __exit lane_module_cleanup(void) |
1186 | { |
1187 | int i; |
1188 | struct lec_priv *priv; |
1189 | |
1190 | remove_proc_entry("lec", atm_proc_root); |
1191 | |
1192 | deregister_atm_ioctl(&lane_ioctl_ops); |
1193 | |
1194 | for (i = 0; i < MAX_LEC_ITF; i++) { |
1195 | if (dev_lec[i] != NULL) { |
1196 | priv = netdev_priv(dev_lec[i]); |
1197 | unregister_netdev(dev_lec[i]); |
1198 | free_netdev(dev_lec[i]); |
1199 | dev_lec[i] = NULL; |
1200 | } |
1201 | } |
1202 | |
1203 | return; |
1204 | } |
1205 | |
1206 | module_init(lane_module_init); |
1207 | module_exit(lane_module_cleanup); |
1208 | |
1209 | /* |
1210 | * LANE2: 3.1.3, LE_RESOLVE.request |
1211 | * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs. |
1212 | * If sizeoftlvs == NULL the default TLVs associated with with this |
1213 | * lec will be used. |
1214 | * If dst_mac == NULL, targetless LE_ARP will be sent |
1215 | */ |
1216 | static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force, |
1217 | u8 **tlvs, u32 *sizeoftlvs) |
1218 | { |
1219 | unsigned long flags; |
1220 | struct lec_priv *priv = netdev_priv(dev); |
1221 | struct lec_arp_table *table; |
1222 | struct sk_buff *skb; |
1223 | int retval; |
1224 | |
1225 | if (force == 0) { |
1226 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
1227 | table = lec_arp_find(priv, dst_mac); |
1228 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
1229 | if (table == NULL) |
1230 | return -1; |
1231 | |
1232 | *tlvs = kmemdup(table->tlvs, table->sizeoftlvs, GFP_ATOMIC); |
1233 | if (*tlvs == NULL) |
1234 | return -1; |
1235 | |
1236 | *sizeoftlvs = table->sizeoftlvs; |
1237 | |
1238 | return 0; |
1239 | } |
1240 | |
1241 | if (sizeoftlvs == NULL) |
1242 | retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL); |
1243 | |
1244 | else { |
1245 | skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC); |
1246 | if (skb == NULL) |
1247 | return -1; |
1248 | skb->len = *sizeoftlvs; |
1249 | skb_copy_to_linear_data(skb, *tlvs, *sizeoftlvs); |
1250 | retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb); |
1251 | } |
1252 | return retval; |
1253 | } |
1254 | |
1255 | /* |
1256 | * LANE2: 3.1.4, LE_ASSOCIATE.request |
1257 | * Associate the *tlvs with the *lan_dst address. |
1258 | * Will overwrite any previous association |
1259 | * Returns 1 for success, 0 for failure (out of memory) |
1260 | * |
1261 | */ |
1262 | static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst, |
1263 | const u8 *tlvs, u32 sizeoftlvs) |
1264 | { |
1265 | int retval; |
1266 | struct sk_buff *skb; |
1267 | struct lec_priv *priv = netdev_priv(dev); |
1268 | |
1269 | if (compare_ether_addr(lan_dst, dev->dev_addr)) |
1270 | return 0; /* not our mac address */ |
1271 | |
1272 | kfree(priv->tlvs); /* NULL if there was no previous association */ |
1273 | |
1274 | priv->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL); |
1275 | if (priv->tlvs == NULL) |
1276 | return 0; |
1277 | priv->sizeoftlvs = sizeoftlvs; |
1278 | |
1279 | skb = alloc_skb(sizeoftlvs, GFP_ATOMIC); |
1280 | if (skb == NULL) |
1281 | return 0; |
1282 | skb->len = sizeoftlvs; |
1283 | skb_copy_to_linear_data(skb, tlvs, sizeoftlvs); |
1284 | retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb); |
1285 | if (retval != 0) |
1286 | pr_info("lec.c: lane2_associate_req() failed\n"); |
1287 | /* |
1288 | * If the previous association has changed we must |
1289 | * somehow notify other LANE entities about the change |
1290 | */ |
1291 | return 1; |
1292 | } |
1293 | |
1294 | /* |
1295 | * LANE2: 3.1.5, LE_ASSOCIATE.indication |
1296 | * |
1297 | */ |
1298 | static void lane2_associate_ind(struct net_device *dev, const u8 *mac_addr, |
1299 | const u8 *tlvs, u32 sizeoftlvs) |
1300 | { |
1301 | #if 0 |
1302 | int i = 0; |
1303 | #endif |
1304 | struct lec_priv *priv = netdev_priv(dev); |
1305 | #if 0 /* |
1306 | * Why have the TLVs in LE_ARP entries |
1307 | * since we do not use them? When you |
1308 | * uncomment this code, make sure the |
1309 | * TLVs get freed when entry is killed |
1310 | */ |
1311 | struct lec_arp_table *entry = lec_arp_find(priv, mac_addr); |
1312 | |
1313 | if (entry == NULL) |
1314 | return; /* should not happen */ |
1315 | |
1316 | kfree(entry->tlvs); |
1317 | |
1318 | entry->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL); |
1319 | if (entry->tlvs == NULL) |
1320 | return; |
1321 | entry->sizeoftlvs = sizeoftlvs; |
1322 | #endif |
1323 | #if 0 |
1324 | pr_info("\n"); |
1325 | pr_info("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs); |
1326 | while (i < sizeoftlvs) |
1327 | pr_cont("%02x ", tlvs[i++]); |
1328 | |
1329 | pr_cont("\n"); |
1330 | #endif |
1331 | |
1332 | /* tell MPOA about the TLVs we saw */ |
1333 | if (priv->lane2_ops && priv->lane2_ops->associate_indicator) { |
1334 | priv->lane2_ops->associate_indicator(dev, mac_addr, |
1335 | tlvs, sizeoftlvs); |
1336 | } |
1337 | return; |
1338 | } |
1339 | |
1340 | /* |
1341 | * Here starts what used to lec_arpc.c |
1342 | * |
1343 | * lec_arpc.c was added here when making |
1344 | * lane client modular. October 1997 |
1345 | */ |
1346 | |
1347 | #include <linux/types.h> |
1348 | #include <linux/timer.h> |
1349 | #include <linux/param.h> |
1350 | #include <asm/atomic.h> |
1351 | #include <linux/inetdevice.h> |
1352 | #include <net/route.h> |
1353 | |
1354 | #if 0 |
1355 | #define pr_debug(format, args...) |
1356 | /* |
1357 | #define pr_debug printk |
1358 | */ |
1359 | #endif |
1360 | #define DEBUG_ARP_TABLE 0 |
1361 | |
1362 | #define LEC_ARP_REFRESH_INTERVAL (3*HZ) |
1363 | |
1364 | static void lec_arp_check_expire(struct work_struct *work); |
1365 | static void lec_arp_expire_arp(unsigned long data); |
1366 | |
1367 | /* |
1368 | * Arp table funcs |
1369 | */ |
1370 | |
1371 | #define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE - 1)) |
1372 | |
1373 | /* |
1374 | * Initialization of arp-cache |
1375 | */ |
1376 | static void lec_arp_init(struct lec_priv *priv) |
1377 | { |
1378 | unsigned short i; |
1379 | |
1380 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) |
1381 | INIT_HLIST_HEAD(&priv->lec_arp_tables[i]); |
1382 | INIT_HLIST_HEAD(&priv->lec_arp_empty_ones); |
1383 | INIT_HLIST_HEAD(&priv->lec_no_forward); |
1384 | INIT_HLIST_HEAD(&priv->mcast_fwds); |
1385 | spin_lock_init(&priv->lec_arp_lock); |
1386 | INIT_DELAYED_WORK(&priv->lec_arp_work, lec_arp_check_expire); |
1387 | schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL); |
1388 | } |
1389 | |
1390 | static void lec_arp_clear_vccs(struct lec_arp_table *entry) |
1391 | { |
1392 | if (entry->vcc) { |
1393 | struct atm_vcc *vcc = entry->vcc; |
1394 | struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); |
1395 | struct net_device *dev = (struct net_device *)vcc->proto_data; |
1396 | |
1397 | vcc->pop = vpriv->old_pop; |
1398 | if (vpriv->xoff) |
1399 | netif_wake_queue(dev); |
1400 | kfree(vpriv); |
1401 | vcc->user_back = NULL; |
1402 | vcc->push = entry->old_push; |
1403 | vcc_release_async(vcc, -EPIPE); |
1404 | entry->vcc = NULL; |
1405 | } |
1406 | if (entry->recv_vcc) { |
1407 | entry->recv_vcc->push = entry->old_recv_push; |
1408 | vcc_release_async(entry->recv_vcc, -EPIPE); |
1409 | entry->recv_vcc = NULL; |
1410 | } |
1411 | } |
1412 | |
1413 | /* |
1414 | * Insert entry to lec_arp_table |
1415 | * LANE2: Add to the end of the list to satisfy 8.1.13 |
1416 | */ |
1417 | static inline void |
1418 | lec_arp_add(struct lec_priv *priv, struct lec_arp_table *entry) |
1419 | { |
1420 | struct hlist_head *tmp; |
1421 | |
1422 | tmp = &priv->lec_arp_tables[HASH(entry->mac_addr[ETH_ALEN - 1])]; |
1423 | hlist_add_head(&entry->next, tmp); |
1424 | |
1425 | pr_debug("Added entry:%pM\n", entry->mac_addr); |
1426 | } |
1427 | |
1428 | /* |
1429 | * Remove entry from lec_arp_table |
1430 | */ |
1431 | static int |
1432 | lec_arp_remove(struct lec_priv *priv, struct lec_arp_table *to_remove) |
1433 | { |
1434 | struct hlist_node *node; |
1435 | struct lec_arp_table *entry; |
1436 | int i, remove_vcc = 1; |
1437 | |
1438 | if (!to_remove) |
1439 | return -1; |
1440 | |
1441 | hlist_del(&to_remove->next); |
1442 | del_timer(&to_remove->timer); |
1443 | |
1444 | /* |
1445 | * If this is the only MAC connected to this VCC, |
1446 | * also tear down the VCC |
1447 | */ |
1448 | if (to_remove->status >= ESI_FLUSH_PENDING) { |
1449 | /* |
1450 | * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT |
1451 | */ |
1452 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
1453 | hlist_for_each_entry(entry, node, |
1454 | &priv->lec_arp_tables[i], next) { |
1455 | if (memcmp(to_remove->atm_addr, |
1456 | entry->atm_addr, ATM_ESA_LEN) == 0) { |
1457 | remove_vcc = 0; |
1458 | break; |
1459 | } |
1460 | } |
1461 | } |
1462 | if (remove_vcc) |
1463 | lec_arp_clear_vccs(to_remove); |
1464 | } |
1465 | skb_queue_purge(&to_remove->tx_wait); /* FIXME: good place for this? */ |
1466 | |
1467 | pr_debug("Removed entry:%pM\n", to_remove->mac_addr); |
1468 | return 0; |
1469 | } |
1470 | |
1471 | #if DEBUG_ARP_TABLE |
1472 | static const char *get_status_string(unsigned char st) |
1473 | { |
1474 | switch (st) { |
1475 | case ESI_UNKNOWN: |
1476 | return "ESI_UNKNOWN"; |
1477 | case ESI_ARP_PENDING: |
1478 | return "ESI_ARP_PENDING"; |
1479 | case ESI_VC_PENDING: |
1480 | return "ESI_VC_PENDING"; |
1481 | case ESI_FLUSH_PENDING: |
1482 | return "ESI_FLUSH_PENDING"; |
1483 | case ESI_FORWARD_DIRECT: |
1484 | return "ESI_FORWARD_DIRECT"; |
1485 | } |
1486 | return "<UNKNOWN>"; |
1487 | } |
1488 | |
1489 | static void dump_arp_table(struct lec_priv *priv) |
1490 | { |
1491 | struct hlist_node *node; |
1492 | struct lec_arp_table *rulla; |
1493 | char buf[256]; |
1494 | int i, j, offset; |
1495 | |
1496 | pr_info("Dump %p:\n", priv); |
1497 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
1498 | hlist_for_each_entry(rulla, node, |
1499 | &priv->lec_arp_tables[i], next) { |
1500 | offset = 0; |
1501 | offset += sprintf(buf, "%d: %p\n", i, rulla); |
1502 | offset += sprintf(buf + offset, "Mac: %pM", |
1503 | rulla->mac_addr); |
1504 | offset += sprintf(buf + offset, " Atm:"); |
1505 | for (j = 0; j < ATM_ESA_LEN; j++) { |
1506 | offset += sprintf(buf + offset, |
1507 | "%2.2x ", |
1508 | rulla->atm_addr[j] & 0xff); |
1509 | } |
1510 | offset += sprintf(buf + offset, |
1511 | "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", |
1512 | rulla->vcc ? rulla->vcc->vpi : 0, |
1513 | rulla->vcc ? rulla->vcc->vci : 0, |
1514 | rulla->recv_vcc ? rulla->recv_vcc-> |
1515 | vpi : 0, |
1516 | rulla->recv_vcc ? rulla->recv_vcc-> |
1517 | vci : 0, rulla->last_used, |
1518 | rulla->timestamp, rulla->no_tries); |
1519 | offset += |
1520 | sprintf(buf + offset, |
1521 | "Flags:%x, Packets_flooded:%x, Status: %s ", |
1522 | rulla->flags, rulla->packets_flooded, |
1523 | get_status_string(rulla->status)); |
1524 | pr_info("%s\n", buf); |
1525 | } |
1526 | } |
1527 | |
1528 | if (!hlist_empty(&priv->lec_no_forward)) |
1529 | pr_info("No forward\n"); |
1530 | hlist_for_each_entry(rulla, node, &priv->lec_no_forward, next) { |
1531 | offset = 0; |
1532 | offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr); |
1533 | offset += sprintf(buf + offset, " Atm:"); |
1534 | for (j = 0; j < ATM_ESA_LEN; j++) { |
1535 | offset += sprintf(buf + offset, "%2.2x ", |
1536 | rulla->atm_addr[j] & 0xff); |
1537 | } |
1538 | offset += sprintf(buf + offset, |
1539 | "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", |
1540 | rulla->vcc ? rulla->vcc->vpi : 0, |
1541 | rulla->vcc ? rulla->vcc->vci : 0, |
1542 | rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, |
1543 | rulla->recv_vcc ? rulla->recv_vcc->vci : 0, |
1544 | rulla->last_used, |
1545 | rulla->timestamp, rulla->no_tries); |
1546 | offset += sprintf(buf + offset, |
1547 | "Flags:%x, Packets_flooded:%x, Status: %s ", |
1548 | rulla->flags, rulla->packets_flooded, |
1549 | get_status_string(rulla->status)); |
1550 | pr_info("%s\n", buf); |
1551 | } |
1552 | |
1553 | if (!hlist_empty(&priv->lec_arp_empty_ones)) |
1554 | pr_info("Empty ones\n"); |
1555 | hlist_for_each_entry(rulla, node, &priv->lec_arp_empty_ones, next) { |
1556 | offset = 0; |
1557 | offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr); |
1558 | offset += sprintf(buf + offset, " Atm:"); |
1559 | for (j = 0; j < ATM_ESA_LEN; j++) { |
1560 | offset += sprintf(buf + offset, "%2.2x ", |
1561 | rulla->atm_addr[j] & 0xff); |
1562 | } |
1563 | offset += sprintf(buf + offset, |
1564 | "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", |
1565 | rulla->vcc ? rulla->vcc->vpi : 0, |
1566 | rulla->vcc ? rulla->vcc->vci : 0, |
1567 | rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, |
1568 | rulla->recv_vcc ? rulla->recv_vcc->vci : 0, |
1569 | rulla->last_used, |
1570 | rulla->timestamp, rulla->no_tries); |
1571 | offset += sprintf(buf + offset, |
1572 | "Flags:%x, Packets_flooded:%x, Status: %s ", |
1573 | rulla->flags, rulla->packets_flooded, |
1574 | get_status_string(rulla->status)); |
1575 | pr_info("%s", buf); |
1576 | } |
1577 | |
1578 | if (!hlist_empty(&priv->mcast_fwds)) |
1579 | pr_info("Multicast Forward VCCs\n"); |
1580 | hlist_for_each_entry(rulla, node, &priv->mcast_fwds, next) { |
1581 | offset = 0; |
1582 | offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr); |
1583 | offset += sprintf(buf + offset, " Atm:"); |
1584 | for (j = 0; j < ATM_ESA_LEN; j++) { |
1585 | offset += sprintf(buf + offset, "%2.2x ", |
1586 | rulla->atm_addr[j] & 0xff); |
1587 | } |
1588 | offset += sprintf(buf + offset, |
1589 | "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", |
1590 | rulla->vcc ? rulla->vcc->vpi : 0, |
1591 | rulla->vcc ? rulla->vcc->vci : 0, |
1592 | rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, |
1593 | rulla->recv_vcc ? rulla->recv_vcc->vci : 0, |
1594 | rulla->last_used, |
1595 | rulla->timestamp, rulla->no_tries); |
1596 | offset += sprintf(buf + offset, |
1597 | "Flags:%x, Packets_flooded:%x, Status: %s ", |
1598 | rulla->flags, rulla->packets_flooded, |
1599 | get_status_string(rulla->status)); |
1600 | pr_info("%s\n", buf); |
1601 | } |
1602 | |
1603 | } |
1604 | #else |
1605 | #define dump_arp_table(priv) do { } while (0) |
1606 | #endif |
1607 | |
1608 | /* |
1609 | * Destruction of arp-cache |
1610 | */ |
1611 | static void lec_arp_destroy(struct lec_priv *priv) |
1612 | { |
1613 | unsigned long flags; |
1614 | struct hlist_node *node, *next; |
1615 | struct lec_arp_table *entry; |
1616 | int i; |
1617 | |
1618 | cancel_rearming_delayed_work(&priv->lec_arp_work); |
1619 | |
1620 | /* |
1621 | * Remove all entries |
1622 | */ |
1623 | |
1624 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
1625 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
1626 | hlist_for_each_entry_safe(entry, node, next, |
1627 | &priv->lec_arp_tables[i], next) { |
1628 | lec_arp_remove(priv, entry); |
1629 | lec_arp_put(entry); |
1630 | } |
1631 | INIT_HLIST_HEAD(&priv->lec_arp_tables[i]); |
1632 | } |
1633 | |
1634 | hlist_for_each_entry_safe(entry, node, next, |
1635 | &priv->lec_arp_empty_ones, next) { |
1636 | del_timer_sync(&entry->timer); |
1637 | lec_arp_clear_vccs(entry); |
1638 | hlist_del(&entry->next); |
1639 | lec_arp_put(entry); |
1640 | } |
1641 | INIT_HLIST_HEAD(&priv->lec_arp_empty_ones); |
1642 | |
1643 | hlist_for_each_entry_safe(entry, node, next, |
1644 | &priv->lec_no_forward, next) { |
1645 | del_timer_sync(&entry->timer); |
1646 | lec_arp_clear_vccs(entry); |
1647 | hlist_del(&entry->next); |
1648 | lec_arp_put(entry); |
1649 | } |
1650 | INIT_HLIST_HEAD(&priv->lec_no_forward); |
1651 | |
1652 | hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) { |
1653 | /* No timer, LANEv2 7.1.20 and 2.3.5.3 */ |
1654 | lec_arp_clear_vccs(entry); |
1655 | hlist_del(&entry->next); |
1656 | lec_arp_put(entry); |
1657 | } |
1658 | INIT_HLIST_HEAD(&priv->mcast_fwds); |
1659 | priv->mcast_vcc = NULL; |
1660 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
1661 | } |
1662 | |
1663 | /* |
1664 | * Find entry by mac_address |
1665 | */ |
1666 | static struct lec_arp_table *lec_arp_find(struct lec_priv *priv, |
1667 | const unsigned char *mac_addr) |
1668 | { |
1669 | struct hlist_node *node; |
1670 | struct hlist_head *head; |
1671 | struct lec_arp_table *entry; |
1672 | |
1673 | pr_debug("%pM\n", mac_addr); |
1674 | |
1675 | head = &priv->lec_arp_tables[HASH(mac_addr[ETH_ALEN - 1])]; |
1676 | hlist_for_each_entry(entry, node, head, next) { |
1677 | if (!compare_ether_addr(mac_addr, entry->mac_addr)) |
1678 | return entry; |
1679 | } |
1680 | return NULL; |
1681 | } |
1682 | |
1683 | static struct lec_arp_table *make_entry(struct lec_priv *priv, |
1684 | const unsigned char *mac_addr) |
1685 | { |
1686 | struct lec_arp_table *to_return; |
1687 | |
1688 | to_return = kzalloc(sizeof(struct lec_arp_table), GFP_ATOMIC); |
1689 | if (!to_return) { |
1690 | pr_info("LEC: Arp entry kmalloc failed\n"); |
1691 | return NULL; |
1692 | } |
1693 | memcpy(to_return->mac_addr, mac_addr, ETH_ALEN); |
1694 | INIT_HLIST_NODE(&to_return->next); |
1695 | setup_timer(&to_return->timer, lec_arp_expire_arp, |
1696 | (unsigned long)to_return); |
1697 | to_return->last_used = jiffies; |
1698 | to_return->priv = priv; |
1699 | skb_queue_head_init(&to_return->tx_wait); |
1700 | atomic_set(&to_return->usage, 1); |
1701 | return to_return; |
1702 | } |
1703 | |
1704 | /* Arp sent timer expired */ |
1705 | static void lec_arp_expire_arp(unsigned long data) |
1706 | { |
1707 | struct lec_arp_table *entry; |
1708 | |
1709 | entry = (struct lec_arp_table *)data; |
1710 | |
1711 | pr_debug("\n"); |
1712 | if (entry->status == ESI_ARP_PENDING) { |
1713 | if (entry->no_tries <= entry->priv->max_retry_count) { |
1714 | if (entry->is_rdesc) |
1715 | send_to_lecd(entry->priv, l_rdesc_arp_xmt, |
1716 | entry->mac_addr, NULL, NULL); |
1717 | else |
1718 | send_to_lecd(entry->priv, l_arp_xmt, |
1719 | entry->mac_addr, NULL, NULL); |
1720 | entry->no_tries++; |
1721 | } |
1722 | mod_timer(&entry->timer, jiffies + (1 * HZ)); |
1723 | } |
1724 | } |
1725 | |
1726 | /* Unknown/unused vcc expire, remove associated entry */ |
1727 | static void lec_arp_expire_vcc(unsigned long data) |
1728 | { |
1729 | unsigned long flags; |
1730 | struct lec_arp_table *to_remove = (struct lec_arp_table *)data; |
1731 | struct lec_priv *priv = (struct lec_priv *)to_remove->priv; |
1732 | |
1733 | del_timer(&to_remove->timer); |
1734 | |
1735 | pr_debug("%p %p: vpi:%d vci:%d\n", |
1736 | to_remove, priv, |
1737 | to_remove->vcc ? to_remove->recv_vcc->vpi : 0, |
1738 | to_remove->vcc ? to_remove->recv_vcc->vci : 0); |
1739 | |
1740 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
1741 | hlist_del(&to_remove->next); |
1742 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
1743 | |
1744 | lec_arp_clear_vccs(to_remove); |
1745 | lec_arp_put(to_remove); |
1746 | } |
1747 | |
1748 | static bool __lec_arp_check_expire(struct lec_arp_table *entry, |
1749 | unsigned long now, |
1750 | struct lec_priv *priv) |
1751 | { |
1752 | unsigned long time_to_check; |
1753 | |
1754 | if ((entry->flags) & LEC_REMOTE_FLAG && priv->topology_change) |
1755 | time_to_check = priv->forward_delay_time; |
1756 | else |
1757 | time_to_check = priv->aging_time; |
1758 | |
1759 | pr_debug("About to expire: %lx - %lx > %lx\n", |
1760 | now, entry->last_used, time_to_check); |
1761 | if (time_after(now, entry->last_used + time_to_check) && |
1762 | !(entry->flags & LEC_PERMANENT_FLAG) && |
1763 | !(entry->mac_addr[0] & 0x01)) { /* LANE2: 7.1.20 */ |
1764 | /* Remove entry */ |
1765 | pr_debug("Entry timed out\n"); |
1766 | lec_arp_remove(priv, entry); |
1767 | lec_arp_put(entry); |
1768 | } else { |
1769 | /* Something else */ |
1770 | if ((entry->status == ESI_VC_PENDING || |
1771 | entry->status == ESI_ARP_PENDING) && |
1772 | time_after_eq(now, entry->timestamp + |
1773 | priv->max_unknown_frame_time)) { |
1774 | entry->timestamp = jiffies; |
1775 | entry->packets_flooded = 0; |
1776 | if (entry->status == ESI_VC_PENDING) |
1777 | send_to_lecd(priv, l_svc_setup, |
1778 | entry->mac_addr, |
1779 | entry->atm_addr, |
1780 | NULL); |
1781 | } |
1782 | if (entry->status == ESI_FLUSH_PENDING && |
1783 | time_after_eq(now, entry->timestamp + |
1784 | priv->path_switching_delay)) { |
1785 | lec_arp_hold(entry); |
1786 | return true; |
1787 | } |
1788 | } |
1789 | |
1790 | return false; |
1791 | } |
1792 | /* |
1793 | * Expire entries. |
1794 | * 1. Re-set timer |
1795 | * 2. For each entry, delete entries that have aged past the age limit. |
1796 | * 3. For each entry, depending on the status of the entry, perform |
1797 | * the following maintenance. |
1798 | * a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the |
1799 | * tick_count is above the max_unknown_frame_time, clear |
1800 | * the tick_count to zero and clear the packets_flooded counter |
1801 | * to zero. This supports the packet rate limit per address |
1802 | * while flooding unknowns. |
1803 | * b. If the status is ESI_FLUSH_PENDING and the tick_count is greater |
1804 | * than or equal to the path_switching_delay, change the status |
1805 | * to ESI_FORWARD_DIRECT. This causes the flush period to end |
1806 | * regardless of the progress of the flush protocol. |
1807 | */ |
1808 | static void lec_arp_check_expire(struct work_struct *work) |
1809 | { |
1810 | unsigned long flags; |
1811 | struct lec_priv *priv = |
1812 | container_of(work, struct lec_priv, lec_arp_work.work); |
1813 | struct hlist_node *node, *next; |
1814 | struct lec_arp_table *entry; |
1815 | unsigned long now; |
1816 | int i; |
1817 | |
1818 | pr_debug("%p\n", priv); |
1819 | now = jiffies; |
1820 | restart: |
1821 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
1822 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
1823 | hlist_for_each_entry_safe(entry, node, next, |
1824 | &priv->lec_arp_tables[i], next) { |
1825 | if (__lec_arp_check_expire(entry, now, priv)) { |
1826 | struct sk_buff *skb; |
1827 | struct atm_vcc *vcc = entry->vcc; |
1828 | |
1829 | spin_unlock_irqrestore(&priv->lec_arp_lock, |
1830 | flags); |
1831 | while ((skb = skb_dequeue(&entry->tx_wait))) |
1832 | lec_send(vcc, skb); |
1833 | entry->last_used = jiffies; |
1834 | entry->status = ESI_FORWARD_DIRECT; |
1835 | lec_arp_put(entry); |
1836 | |
1837 | goto restart; |
1838 | } |
1839 | } |
1840 | } |
1841 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
1842 | |
1843 | schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL); |
1844 | } |
1845 | |
1846 | /* |
1847 | * Try to find vcc where mac_address is attached. |
1848 | * |
1849 | */ |
1850 | static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv, |
1851 | const unsigned char *mac_to_find, |
1852 | int is_rdesc, |
1853 | struct lec_arp_table **ret_entry) |
1854 | { |
1855 | unsigned long flags; |
1856 | struct lec_arp_table *entry; |
1857 | struct atm_vcc *found; |
1858 | |
1859 | if (mac_to_find[0] & 0x01) { |
1860 | switch (priv->lane_version) { |
1861 | case 1: |
1862 | return priv->mcast_vcc; |
1863 | case 2: /* LANE2 wants arp for multicast addresses */ |
1864 | if (!compare_ether_addr(mac_to_find, bus_mac)) |
1865 | return priv->mcast_vcc; |
1866 | break; |
1867 | default: |
1868 | break; |
1869 | } |
1870 | } |
1871 | |
1872 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
1873 | entry = lec_arp_find(priv, mac_to_find); |
1874 | |
1875 | if (entry) { |
1876 | if (entry->status == ESI_FORWARD_DIRECT) { |
1877 | /* Connection Ok */ |
1878 | entry->last_used = jiffies; |
1879 | lec_arp_hold(entry); |
1880 | *ret_entry = entry; |
1881 | found = entry->vcc; |
1882 | goto out; |
1883 | } |
1884 | /* |
1885 | * If the LE_ARP cache entry is still pending, reset count to 0 |
1886 | * so another LE_ARP request can be made for this frame. |
1887 | */ |
1888 | if (entry->status == ESI_ARP_PENDING) |
1889 | entry->no_tries = 0; |
1890 | /* |
1891 | * Data direct VC not yet set up, check to see if the unknown |
1892 | * frame count is greater than the limit. If the limit has |
1893 | * not been reached, allow the caller to send packet to |
1894 | * BUS. |
1895 | */ |
1896 | if (entry->status != ESI_FLUSH_PENDING && |
1897 | entry->packets_flooded < |
1898 | priv->maximum_unknown_frame_count) { |
1899 | entry->packets_flooded++; |
1900 | pr_debug("Flooding..\n"); |
1901 | found = priv->mcast_vcc; |
1902 | goto out; |
1903 | } |
1904 | /* |
1905 | * We got here because entry->status == ESI_FLUSH_PENDING |
1906 | * or BUS flood limit was reached for an entry which is |
1907 | * in ESI_ARP_PENDING or ESI_VC_PENDING state. |
1908 | */ |
1909 | lec_arp_hold(entry); |
1910 | *ret_entry = entry; |
1911 | pr_debug("entry->status %d entry->vcc %p\n", entry->status, |
1912 | entry->vcc); |
1913 | found = NULL; |
1914 | } else { |
1915 | /* No matching entry was found */ |
1916 | entry = make_entry(priv, mac_to_find); |
1917 | pr_debug("Making entry\n"); |
1918 | if (!entry) { |
1919 | found = priv->mcast_vcc; |
1920 | goto out; |
1921 | } |
1922 | lec_arp_add(priv, entry); |
1923 | /* We want arp-request(s) to be sent */ |
1924 | entry->packets_flooded = 1; |
1925 | entry->status = ESI_ARP_PENDING; |
1926 | entry->no_tries = 1; |
1927 | entry->last_used = entry->timestamp = jiffies; |
1928 | entry->is_rdesc = is_rdesc; |
1929 | if (entry->is_rdesc) |
1930 | send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL, |
1931 | NULL); |
1932 | else |
1933 | send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL); |
1934 | entry->timer.expires = jiffies + (1 * HZ); |
1935 | entry->timer.function = lec_arp_expire_arp; |
1936 | add_timer(&entry->timer); |
1937 | found = priv->mcast_vcc; |
1938 | } |
1939 | |
1940 | out: |
1941 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
1942 | return found; |
1943 | } |
1944 | |
1945 | static int |
1946 | lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr, |
1947 | unsigned long permanent) |
1948 | { |
1949 | unsigned long flags; |
1950 | struct hlist_node *node, *next; |
1951 | struct lec_arp_table *entry; |
1952 | int i; |
1953 | |
1954 | pr_debug("\n"); |
1955 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
1956 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
1957 | hlist_for_each_entry_safe(entry, node, next, |
1958 | &priv->lec_arp_tables[i], next) { |
1959 | if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN) && |
1960 | (permanent || |
1961 | !(entry->flags & LEC_PERMANENT_FLAG))) { |
1962 | lec_arp_remove(priv, entry); |
1963 | lec_arp_put(entry); |
1964 | } |
1965 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
1966 | return 0; |
1967 | } |
1968 | } |
1969 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
1970 | return -1; |
1971 | } |
1972 | |
1973 | /* |
1974 | * Notifies: Response to arp_request (atm_addr != NULL) |
1975 | */ |
1976 | static void |
1977 | lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr, |
1978 | const unsigned char *atm_addr, unsigned long remoteflag, |
1979 | unsigned int targetless_le_arp) |
1980 | { |
1981 | unsigned long flags; |
1982 | struct hlist_node *node, *next; |
1983 | struct lec_arp_table *entry, *tmp; |
1984 | int i; |
1985 | |
1986 | pr_debug("%smac:%pM\n", |
1987 | (targetless_le_arp) ? "targetless " : "", mac_addr); |
1988 | |
1989 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
1990 | entry = lec_arp_find(priv, mac_addr); |
1991 | if (entry == NULL && targetless_le_arp) |
1992 | goto out; /* |
1993 | * LANE2: ignore targetless LE_ARPs for which |
1994 | * we have no entry in the cache. 7.1.30 |
1995 | */ |
1996 | if (!hlist_empty(&priv->lec_arp_empty_ones)) { |
1997 | hlist_for_each_entry_safe(entry, node, next, |
1998 | &priv->lec_arp_empty_ones, next) { |
1999 | if (memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN) == 0) { |
2000 | hlist_del(&entry->next); |
2001 | del_timer(&entry->timer); |
2002 | tmp = lec_arp_find(priv, mac_addr); |
2003 | if (tmp) { |
2004 | del_timer(&tmp->timer); |
2005 | tmp->status = ESI_FORWARD_DIRECT; |
2006 | memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN); |
2007 | tmp->vcc = entry->vcc; |
2008 | tmp->old_push = entry->old_push; |
2009 | tmp->last_used = jiffies; |
2010 | del_timer(&entry->timer); |
2011 | lec_arp_put(entry); |
2012 | entry = tmp; |
2013 | } else { |
2014 | entry->status = ESI_FORWARD_DIRECT; |
2015 | memcpy(entry->mac_addr, mac_addr, ETH_ALEN); |
2016 | entry->last_used = jiffies; |
2017 | lec_arp_add(priv, entry); |
2018 | } |
2019 | if (remoteflag) |
2020 | entry->flags |= LEC_REMOTE_FLAG; |
2021 | else |
2022 | entry->flags &= ~LEC_REMOTE_FLAG; |
2023 | pr_debug("After update\n"); |
2024 | dump_arp_table(priv); |
2025 | goto out; |
2026 | } |
2027 | } |
2028 | } |
2029 | |
2030 | entry = lec_arp_find(priv, mac_addr); |
2031 | if (!entry) { |
2032 | entry = make_entry(priv, mac_addr); |
2033 | if (!entry) |
2034 | goto out; |
2035 | entry->status = ESI_UNKNOWN; |
2036 | lec_arp_add(priv, entry); |
2037 | /* Temporary, changes before end of function */ |
2038 | } |
2039 | memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN); |
2040 | del_timer(&entry->timer); |
2041 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
2042 | hlist_for_each_entry(tmp, node, |
2043 | &priv->lec_arp_tables[i], next) { |
2044 | if (entry != tmp && |
2045 | !memcmp(tmp->atm_addr, atm_addr, ATM_ESA_LEN)) { |
2046 | /* Vcc to this host exists */ |
2047 | if (tmp->status > ESI_VC_PENDING) { |
2048 | /* |
2049 | * ESI_FLUSH_PENDING, |
2050 | * ESI_FORWARD_DIRECT |
2051 | */ |
2052 | entry->vcc = tmp->vcc; |
2053 | entry->old_push = tmp->old_push; |
2054 | } |
2055 | entry->status = tmp->status; |
2056 | break; |
2057 | } |
2058 | } |
2059 | } |
2060 | if (remoteflag) |
2061 | entry->flags |= LEC_REMOTE_FLAG; |
2062 | else |
2063 | entry->flags &= ~LEC_REMOTE_FLAG; |
2064 | if (entry->status == ESI_ARP_PENDING || entry->status == ESI_UNKNOWN) { |
2065 | entry->status = ESI_VC_PENDING; |
2066 | send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL); |
2067 | } |
2068 | pr_debug("After update2\n"); |
2069 | dump_arp_table(priv); |
2070 | out: |
2071 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
2072 | } |
2073 | |
2074 | /* |
2075 | * Notifies: Vcc setup ready |
2076 | */ |
2077 | static void |
2078 | lec_vcc_added(struct lec_priv *priv, const struct atmlec_ioc *ioc_data, |
2079 | struct atm_vcc *vcc, |
2080 | void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb)) |
2081 | { |
2082 | unsigned long flags; |
2083 | struct hlist_node *node; |
2084 | struct lec_arp_table *entry; |
2085 | int i, found_entry = 0; |
2086 | |
2087 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
2088 | /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */ |
2089 | if (ioc_data->receive == 2) { |
2090 | pr_debug("LEC_ARP: Attaching mcast forward\n"); |
2091 | #if 0 |
2092 | entry = lec_arp_find(priv, bus_mac); |
2093 | if (!entry) { |
2094 | pr_info("LEC_ARP: Multicast entry not found!\n"); |
2095 | goto out; |
2096 | } |
2097 | memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); |
2098 | entry->recv_vcc = vcc; |
2099 | entry->old_recv_push = old_push; |
2100 | #endif |
2101 | entry = make_entry(priv, bus_mac); |
2102 | if (entry == NULL) |
2103 | goto out; |
2104 | del_timer(&entry->timer); |
2105 | memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); |
2106 | entry->recv_vcc = vcc; |
2107 | entry->old_recv_push = old_push; |
2108 | hlist_add_head(&entry->next, &priv->mcast_fwds); |
2109 | goto out; |
2110 | } else if (ioc_data->receive == 1) { |
2111 | /* |
2112 | * Vcc which we don't want to make default vcc, |
2113 | * attach it anyway. |
2114 | */ |
2115 | 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", |
2116 | ioc_data->atm_addr[0], ioc_data->atm_addr[1], |
2117 | ioc_data->atm_addr[2], ioc_data->atm_addr[3], |
2118 | ioc_data->atm_addr[4], ioc_data->atm_addr[5], |
2119 | ioc_data->atm_addr[6], ioc_data->atm_addr[7], |
2120 | ioc_data->atm_addr[8], ioc_data->atm_addr[9], |
2121 | ioc_data->atm_addr[10], ioc_data->atm_addr[11], |
2122 | ioc_data->atm_addr[12], ioc_data->atm_addr[13], |
2123 | ioc_data->atm_addr[14], ioc_data->atm_addr[15], |
2124 | ioc_data->atm_addr[16], ioc_data->atm_addr[17], |
2125 | ioc_data->atm_addr[18], ioc_data->atm_addr[19]); |
2126 | entry = make_entry(priv, bus_mac); |
2127 | if (entry == NULL) |
2128 | goto out; |
2129 | memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); |
2130 | memset(entry->mac_addr, 0, ETH_ALEN); |
2131 | entry->recv_vcc = vcc; |
2132 | entry->old_recv_push = old_push; |
2133 | entry->status = ESI_UNKNOWN; |
2134 | entry->timer.expires = jiffies + priv->vcc_timeout_period; |
2135 | entry->timer.function = lec_arp_expire_vcc; |
2136 | hlist_add_head(&entry->next, &priv->lec_no_forward); |
2137 | add_timer(&entry->timer); |
2138 | dump_arp_table(priv); |
2139 | goto out; |
2140 | } |
2141 | 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", |
2142 | ioc_data->atm_addr[0], ioc_data->atm_addr[1], |
2143 | ioc_data->atm_addr[2], ioc_data->atm_addr[3], |
2144 | ioc_data->atm_addr[4], ioc_data->atm_addr[5], |
2145 | ioc_data->atm_addr[6], ioc_data->atm_addr[7], |
2146 | ioc_data->atm_addr[8], ioc_data->atm_addr[9], |
2147 | ioc_data->atm_addr[10], ioc_data->atm_addr[11], |
2148 | ioc_data->atm_addr[12], ioc_data->atm_addr[13], |
2149 | ioc_data->atm_addr[14], ioc_data->atm_addr[15], |
2150 | ioc_data->atm_addr[16], ioc_data->atm_addr[17], |
2151 | ioc_data->atm_addr[18], ioc_data->atm_addr[19]); |
2152 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
2153 | hlist_for_each_entry(entry, node, |
2154 | &priv->lec_arp_tables[i], next) { |
2155 | if (memcmp |
2156 | (ioc_data->atm_addr, entry->atm_addr, |
2157 | ATM_ESA_LEN) == 0) { |
2158 | pr_debug("LEC_ARP: Attaching data direct\n"); |
2159 | pr_debug("Currently -> Vcc: %d, Rvcc:%d\n", |
2160 | entry->vcc ? entry->vcc->vci : 0, |
2161 | entry->recv_vcc ? entry->recv_vcc-> |
2162 | vci : 0); |
2163 | found_entry = 1; |
2164 | del_timer(&entry->timer); |
2165 | entry->vcc = vcc; |
2166 | entry->old_push = old_push; |
2167 | if (entry->status == ESI_VC_PENDING) { |
2168 | if (priv->maximum_unknown_frame_count |
2169 | == 0) |
2170 | entry->status = |
2171 | ESI_FORWARD_DIRECT; |
2172 | else { |
2173 | entry->timestamp = jiffies; |
2174 | entry->status = |
2175 | ESI_FLUSH_PENDING; |
2176 | #if 0 |
2177 | send_to_lecd(priv, l_flush_xmt, |
2178 | NULL, |
2179 | entry->atm_addr, |
2180 | NULL); |
2181 | #endif |
2182 | } |
2183 | } else { |
2184 | /* |
2185 | * They were forming a connection |
2186 | * to us, and we to them. Our |
2187 | * ATM address is numerically lower |
2188 | * than theirs, so we make connection |
2189 | * we formed into default VCC (8.1.11). |
2190 | * Connection they made gets torn |
2191 | * down. This might confuse some |
2192 | * clients. Can be changed if |
2193 | * someone reports trouble... |
2194 | */ |
2195 | ; |
2196 | } |
2197 | } |
2198 | } |
2199 | } |
2200 | if (found_entry) { |
2201 | pr_debug("After vcc was added\n"); |
2202 | dump_arp_table(priv); |
2203 | goto out; |
2204 | } |
2205 | /* |
2206 | * Not found, snatch address from first data packet that arrives |
2207 | * from this vcc |
2208 | */ |
2209 | entry = make_entry(priv, bus_mac); |
2210 | if (!entry) |
2211 | goto out; |
2212 | entry->vcc = vcc; |
2213 | entry->old_push = old_push; |
2214 | memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); |
2215 | memset(entry->mac_addr, 0, ETH_ALEN); |
2216 | entry->status = ESI_UNKNOWN; |
2217 | hlist_add_head(&entry->next, &priv->lec_arp_empty_ones); |
2218 | entry->timer.expires = jiffies + priv->vcc_timeout_period; |
2219 | entry->timer.function = lec_arp_expire_vcc; |
2220 | add_timer(&entry->timer); |
2221 | pr_debug("After vcc was added\n"); |
2222 | dump_arp_table(priv); |
2223 | out: |
2224 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
2225 | } |
2226 | |
2227 | static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id) |
2228 | { |
2229 | unsigned long flags; |
2230 | struct hlist_node *node; |
2231 | struct lec_arp_table *entry; |
2232 | int i; |
2233 | |
2234 | pr_debug("%lx\n", tran_id); |
2235 | restart: |
2236 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
2237 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
2238 | hlist_for_each_entry(entry, node, |
2239 | &priv->lec_arp_tables[i], next) { |
2240 | if (entry->flush_tran_id == tran_id && |
2241 | entry->status == ESI_FLUSH_PENDING) { |
2242 | struct sk_buff *skb; |
2243 | struct atm_vcc *vcc = entry->vcc; |
2244 | |
2245 | lec_arp_hold(entry); |
2246 | spin_unlock_irqrestore(&priv->lec_arp_lock, |
2247 | flags); |
2248 | while ((skb = skb_dequeue(&entry->tx_wait))) |
2249 | lec_send(vcc, skb); |
2250 | entry->last_used = jiffies; |
2251 | entry->status = ESI_FORWARD_DIRECT; |
2252 | lec_arp_put(entry); |
2253 | pr_debug("LEC_ARP: Flushed\n"); |
2254 | goto restart; |
2255 | } |
2256 | } |
2257 | } |
2258 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
2259 | dump_arp_table(priv); |
2260 | } |
2261 | |
2262 | static void |
2263 | lec_set_flush_tran_id(struct lec_priv *priv, |
2264 | const unsigned char *atm_addr, unsigned long tran_id) |
2265 | { |
2266 | unsigned long flags; |
2267 | struct hlist_node *node; |
2268 | struct lec_arp_table *entry; |
2269 | int i; |
2270 | |
2271 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
2272 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) |
2273 | hlist_for_each_entry(entry, node, |
2274 | &priv->lec_arp_tables[i], next) { |
2275 | if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) { |
2276 | entry->flush_tran_id = tran_id; |
2277 | pr_debug("Set flush transaction id to %lx for %p\n", |
2278 | tran_id, entry); |
2279 | } |
2280 | } |
2281 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
2282 | } |
2283 | |
2284 | static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc) |
2285 | { |
2286 | unsigned long flags; |
2287 | unsigned char mac_addr[] = { |
2288 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff |
2289 | }; |
2290 | struct lec_arp_table *to_add; |
2291 | struct lec_vcc_priv *vpriv; |
2292 | int err = 0; |
2293 | |
2294 | vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL); |
2295 | if (!vpriv) |
2296 | return -ENOMEM; |
2297 | vpriv->xoff = 0; |
2298 | vpriv->old_pop = vcc->pop; |
2299 | vcc->user_back = vpriv; |
2300 | vcc->pop = lec_pop; |
2301 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
2302 | to_add = make_entry(priv, mac_addr); |
2303 | if (!to_add) { |
2304 | vcc->pop = vpriv->old_pop; |
2305 | kfree(vpriv); |
2306 | err = -ENOMEM; |
2307 | goto out; |
2308 | } |
2309 | memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN); |
2310 | to_add->status = ESI_FORWARD_DIRECT; |
2311 | to_add->flags |= LEC_PERMANENT_FLAG; |
2312 | to_add->vcc = vcc; |
2313 | to_add->old_push = vcc->push; |
2314 | vcc->push = lec_push; |
2315 | priv->mcast_vcc = vcc; |
2316 | lec_arp_add(priv, to_add); |
2317 | out: |
2318 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
2319 | return err; |
2320 | } |
2321 | |
2322 | static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc) |
2323 | { |
2324 | unsigned long flags; |
2325 | struct hlist_node *node, *next; |
2326 | struct lec_arp_table *entry; |
2327 | int i; |
2328 | |
2329 | pr_debug("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n", vcc->vpi, vcc->vci); |
2330 | dump_arp_table(priv); |
2331 | |
2332 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
2333 | |
2334 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
2335 | hlist_for_each_entry_safe(entry, node, next, |
2336 | &priv->lec_arp_tables[i], next) { |
2337 | if (vcc == entry->vcc) { |
2338 | lec_arp_remove(priv, entry); |
2339 | lec_arp_put(entry); |
2340 | if (priv->mcast_vcc == vcc) |
2341 | priv->mcast_vcc = NULL; |
2342 | } |
2343 | } |
2344 | } |
2345 | |
2346 | hlist_for_each_entry_safe(entry, node, next, |
2347 | &priv->lec_arp_empty_ones, next) { |
2348 | if (entry->vcc == vcc) { |
2349 | lec_arp_clear_vccs(entry); |
2350 | del_timer(&entry->timer); |
2351 | hlist_del(&entry->next); |
2352 | lec_arp_put(entry); |
2353 | } |
2354 | } |
2355 | |
2356 | hlist_for_each_entry_safe(entry, node, next, |
2357 | &priv->lec_no_forward, next) { |
2358 | if (entry->recv_vcc == vcc) { |
2359 | lec_arp_clear_vccs(entry); |
2360 | del_timer(&entry->timer); |
2361 | hlist_del(&entry->next); |
2362 | lec_arp_put(entry); |
2363 | } |
2364 | } |
2365 | |
2366 | hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) { |
2367 | if (entry->recv_vcc == vcc) { |
2368 | lec_arp_clear_vccs(entry); |
2369 | /* No timer, LANEv2 7.1.20 and 2.3.5.3 */ |
2370 | hlist_del(&entry->next); |
2371 | lec_arp_put(entry); |
2372 | } |
2373 | } |
2374 | |
2375 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
2376 | dump_arp_table(priv); |
2377 | } |
2378 | |
2379 | static void |
2380 | lec_arp_check_empties(struct lec_priv *priv, |
2381 | struct atm_vcc *vcc, struct sk_buff *skb) |
2382 | { |
2383 | unsigned long flags; |
2384 | struct hlist_node *node, *next; |
2385 | struct lec_arp_table *entry, *tmp; |
2386 | struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data; |
2387 | unsigned char *src; |
2388 | #ifdef CONFIG_TR |
2389 | struct lecdatahdr_8025 *tr_hdr = (struct lecdatahdr_8025 *)skb->data; |
2390 | |
2391 | if (priv->is_trdev) |
2392 | src = tr_hdr->h_source; |
2393 | else |
2394 | #endif |
2395 | src = hdr->h_source; |
2396 | |
2397 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
2398 | hlist_for_each_entry_safe(entry, node, next, |
2399 | &priv->lec_arp_empty_ones, next) { |
2400 | if (vcc == entry->vcc) { |
2401 | del_timer(&entry->timer); |
2402 | memcpy(entry->mac_addr, src, ETH_ALEN); |
2403 | entry->status = ESI_FORWARD_DIRECT; |
2404 | entry->last_used = jiffies; |
2405 | /* We might have got an entry */ |
2406 | tmp = lec_arp_find(priv, src); |
2407 | if (tmp) { |
2408 | lec_arp_remove(priv, tmp); |
2409 | lec_arp_put(tmp); |
2410 | } |
2411 | hlist_del(&entry->next); |
2412 | lec_arp_add(priv, entry); |
2413 | goto out; |
2414 | } |
2415 | } |
2416 | pr_debug("LEC_ARP: Arp_check_empties: entry not found!\n"); |
2417 | out: |
2418 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
2419 | } |
2420 | |
2421 | MODULE_LICENSE("GPL"); |
2422 |
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ben-wpan
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javiroman/ks7010
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
v2.6.34-rc7
v3.9