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