1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * lec.c: Lan Emulation driver |
4 | * |
5 | * Marko Kiiskila <mkiiskila@yahoo.com> |
6 | */ |
7 | |
8 | #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__ |
9 | |
10 | #include <linux/slab.h> |
11 | #include <linux/kernel.h> |
12 | #include <linux/bitops.h> |
13 | #include <linux/capability.h> |
14 | |
15 | /* We are ethernet device */ |
16 | #include <linux/if_ether.h> |
17 | #include <linux/netdevice.h> |
18 | #include <linux/etherdevice.h> |
19 | #include <net/sock.h> |
20 | #include <linux/skbuff.h> |
21 | #include <linux/ip.h> |
22 | #include <asm/byteorder.h> |
23 | #include <linux/uaccess.h> |
24 | #include <net/arp.h> |
25 | #include <net/dst.h> |
26 | #include <linux/proc_fs.h> |
27 | #include <linux/spinlock.h> |
28 | #include <linux/seq_file.h> |
29 | |
30 | /* And atm device */ |
31 | #include <linux/atmdev.h> |
32 | #include <linux/atmlec.h> |
33 | |
34 | /* Proxy LEC knows about bridging */ |
35 | #if IS_ENABLED(CONFIG_BRIDGE) |
36 | #include "../bridge/br_private.h" |
37 | |
38 | static unsigned char bridge_ula_lec[] = { 0x01, 0x80, 0xc2, 0x00, 0x00 }; |
39 | #endif |
40 | |
41 | /* Modular too */ |
42 | #include <linux/module.h> |
43 | #include <linux/init.h> |
44 | |
45 | /* Hardening for Spectre-v1 */ |
46 | #include <linux/nospec.h> |
47 | |
48 | #include "lec.h" |
49 | #include "lec_arpc.h" |
50 | #include "resources.h" |
51 | |
52 | #define DUMP_PACKETS 0 /* |
53 | * 0 = None, |
54 | * 1 = 30 first bytes |
55 | * 2 = Whole packet |
56 | */ |
57 | |
58 | #define LEC_UNRES_QUE_LEN 8 /* |
59 | * number of tx packets to queue for a |
60 | * single destination while waiting for SVC |
61 | */ |
62 | |
63 | static int lec_open(struct net_device *dev); |
64 | static netdev_tx_t lec_start_xmit(struct sk_buff *skb, |
65 | struct net_device *dev); |
66 | static int lec_close(struct net_device *dev); |
67 | static struct lec_arp_table *lec_arp_find(struct lec_priv *priv, |
68 | const unsigned char *mac_addr); |
69 | static int lec_arp_remove(struct lec_priv *priv, |
70 | struct lec_arp_table *to_remove); |
71 | /* LANE2 functions */ |
72 | static void lane2_associate_ind(struct net_device *dev, const u8 *mac_address, |
73 | const u8 *tlvs, u32 sizeoftlvs); |
74 | static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force, |
75 | u8 **tlvs, u32 *sizeoftlvs); |
76 | static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst, |
77 | const u8 *tlvs, u32 sizeoftlvs); |
78 | |
79 | static int lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr, |
80 | unsigned long permanent); |
81 | static void lec_arp_check_empties(struct lec_priv *priv, |
82 | struct atm_vcc *vcc, struct sk_buff *skb); |
83 | static void lec_arp_destroy(struct lec_priv *priv); |
84 | static void lec_arp_init(struct lec_priv *priv); |
85 | static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv, |
86 | const unsigned char *mac_to_find, |
87 | int is_rdesc, |
88 | struct lec_arp_table **ret_entry); |
89 | static void lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr, |
90 | const unsigned char *atm_addr, |
91 | unsigned long remoteflag, |
92 | unsigned int targetless_le_arp); |
93 | static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id); |
94 | static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc); |
95 | static void lec_set_flush_tran_id(struct lec_priv *priv, |
96 | const unsigned char *atm_addr, |
97 | unsigned long tran_id); |
98 | static void lec_vcc_added(struct lec_priv *priv, |
99 | const struct atmlec_ioc *ioc_data, |
100 | struct atm_vcc *vcc, |
101 | void (*old_push)(struct atm_vcc *vcc, |
102 | struct sk_buff *skb)); |
103 | static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc); |
104 | |
105 | /* must be done under lec_arp_lock */ |
106 | static inline void lec_arp_hold(struct lec_arp_table *entry) |
107 | { |
108 | refcount_inc(r: &entry->usage); |
109 | } |
110 | |
111 | static inline void lec_arp_put(struct lec_arp_table *entry) |
112 | { |
113 | if (refcount_dec_and_test(r: &entry->usage)) |
114 | kfree(objp: entry); |
115 | } |
116 | |
117 | static struct lane2_ops lane2_ops = { |
118 | .resolve = lane2_resolve, /* spec 3.1.3 */ |
119 | .associate_req = lane2_associate_req, /* spec 3.1.4 */ |
120 | .associate_indicator = NULL /* spec 3.1.5 */ |
121 | }; |
122 | |
123 | static unsigned char bus_mac[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; |
124 | |
125 | /* Device structures */ |
126 | static struct net_device *dev_lec[MAX_LEC_ITF]; |
127 | |
128 | #if IS_ENABLED(CONFIG_BRIDGE) |
129 | static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev) |
130 | { |
131 | char *buff; |
132 | struct lec_priv *priv; |
133 | |
134 | /* |
135 | * Check if this is a BPDU. If so, ask zeppelin to send |
136 | * LE_TOPOLOGY_REQUEST with the same value of Topology Change bit |
137 | * as the Config BPDU has |
138 | */ |
139 | buff = skb->data + skb->dev->hard_header_len; |
140 | if (*buff++ == 0x42 && *buff++ == 0x42 && *buff++ == 0x03) { |
141 | struct sock *sk; |
142 | struct sk_buff *skb2; |
143 | struct atmlec_msg *mesg; |
144 | |
145 | skb2 = alloc_skb(size: sizeof(struct atmlec_msg), GFP_ATOMIC); |
146 | if (skb2 == NULL) |
147 | return; |
148 | skb2->len = sizeof(struct atmlec_msg); |
149 | mesg = (struct atmlec_msg *)skb2->data; |
150 | mesg->type = l_topology_change; |
151 | buff += 4; |
152 | mesg->content.normal.flag = *buff & 0x01; |
153 | /* 0x01 is topology change */ |
154 | |
155 | priv = netdev_priv(dev); |
156 | atm_force_charge(vcc: priv->lecd, truesize: skb2->truesize); |
157 | sk = sk_atm(vcc: priv->lecd); |
158 | skb_queue_tail(list: &sk->sk_receive_queue, newsk: skb2); |
159 | sk->sk_data_ready(sk); |
160 | } |
161 | } |
162 | #endif /* IS_ENABLED(CONFIG_BRIDGE) */ |
163 | |
164 | /* |
165 | * Open/initialize the netdevice. This is called (in the current kernel) |
166 | * sometime after booting when the 'ifconfig' program is run. |
167 | * |
168 | * This routine should set everything up anew at each open, even |
169 | * registers that "should" only need to be set once at boot, so that |
170 | * there is non-reboot way to recover if something goes wrong. |
171 | */ |
172 | |
173 | static int lec_open(struct net_device *dev) |
174 | { |
175 | netif_start_queue(dev); |
176 | |
177 | return 0; |
178 | } |
179 | |
180 | static void |
181 | lec_send(struct atm_vcc *vcc, struct sk_buff *skb) |
182 | { |
183 | struct net_device *dev = skb->dev; |
184 | |
185 | ATM_SKB(skb)->vcc = vcc; |
186 | atm_account_tx(vcc, skb); |
187 | |
188 | if (vcc->send(vcc, skb) < 0) { |
189 | dev->stats.tx_dropped++; |
190 | return; |
191 | } |
192 | |
193 | dev->stats.tx_packets++; |
194 | dev->stats.tx_bytes += skb->len; |
195 | } |
196 | |
197 | static void lec_tx_timeout(struct net_device *dev, unsigned int txqueue) |
198 | { |
199 | pr_info("%s\n" , dev->name); |
200 | netif_trans_update(dev); |
201 | netif_wake_queue(dev); |
202 | } |
203 | |
204 | static netdev_tx_t lec_start_xmit(struct sk_buff *skb, |
205 | struct net_device *dev) |
206 | { |
207 | struct sk_buff *skb2; |
208 | struct lec_priv *priv = netdev_priv(dev); |
209 | struct lecdatahdr_8023 *lec_h; |
210 | struct atm_vcc *vcc; |
211 | struct lec_arp_table *entry; |
212 | unsigned char *dst; |
213 | int min_frame_size; |
214 | int is_rdesc; |
215 | |
216 | pr_debug("called\n" ); |
217 | if (!priv->lecd) { |
218 | pr_info("%s:No lecd attached\n" , dev->name); |
219 | dev->stats.tx_errors++; |
220 | netif_stop_queue(dev); |
221 | kfree_skb(skb); |
222 | return NETDEV_TX_OK; |
223 | } |
224 | |
225 | pr_debug("skbuff head:%lx data:%lx tail:%lx end:%lx\n" , |
226 | (long)skb->head, (long)skb->data, (long)skb_tail_pointer(skb), |
227 | (long)skb_end_pointer(skb)); |
228 | #if IS_ENABLED(CONFIG_BRIDGE) |
229 | if (memcmp(p: skb->data, q: bridge_ula_lec, size: sizeof(bridge_ula_lec)) == 0) |
230 | lec_handle_bridge(skb, dev); |
231 | #endif |
232 | |
233 | /* Make sure we have room for lec_id */ |
234 | if (skb_headroom(skb) < 2) { |
235 | pr_debug("reallocating skb\n" ); |
236 | skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN); |
237 | if (unlikely(!skb2)) { |
238 | kfree_skb(skb); |
239 | return NETDEV_TX_OK; |
240 | } |
241 | consume_skb(skb); |
242 | skb = skb2; |
243 | } |
244 | skb_push(skb, len: 2); |
245 | |
246 | /* Put le header to place */ |
247 | lec_h = (struct lecdatahdr_8023 *)skb->data; |
248 | lec_h->le_header = htons(priv->lecid); |
249 | |
250 | #if DUMP_PACKETS >= 2 |
251 | #define MAX_DUMP_SKB 99 |
252 | #elif DUMP_PACKETS >= 1 |
253 | #define MAX_DUMP_SKB 30 |
254 | #endif |
255 | #if DUMP_PACKETS >= 1 |
256 | printk(KERN_DEBUG "%s: send datalen:%ld lecid:%4.4x\n" , |
257 | dev->name, skb->len, priv->lecid); |
258 | print_hex_dump(KERN_DEBUG, "" , DUMP_OFFSET, 16, 1, |
259 | skb->data, min(skb->len, MAX_DUMP_SKB), true); |
260 | #endif /* DUMP_PACKETS >= 1 */ |
261 | |
262 | /* Minimum ethernet-frame size */ |
263 | min_frame_size = LEC_MINIMUM_8023_SIZE; |
264 | if (skb->len < min_frame_size) { |
265 | if ((skb->len + skb_tailroom(skb)) < min_frame_size) { |
266 | skb2 = skb_copy_expand(skb, newheadroom: 0, |
267 | newtailroom: min_frame_size - skb->truesize, |
268 | GFP_ATOMIC); |
269 | dev_kfree_skb(skb); |
270 | if (skb2 == NULL) { |
271 | dev->stats.tx_dropped++; |
272 | return NETDEV_TX_OK; |
273 | } |
274 | skb = skb2; |
275 | } |
276 | skb_put(skb, len: min_frame_size - skb->len); |
277 | } |
278 | |
279 | /* Send to right vcc */ |
280 | is_rdesc = 0; |
281 | dst = lec_h->h_dest; |
282 | entry = NULL; |
283 | vcc = lec_arp_resolve(priv, mac_to_find: dst, is_rdesc, ret_entry: &entry); |
284 | pr_debug("%s:vcc:%p vcc_flags:%lx, entry:%p\n" , |
285 | dev->name, vcc, vcc ? vcc->flags : 0, entry); |
286 | if (!vcc || !test_bit(ATM_VF_READY, &vcc->flags)) { |
287 | if (entry && (entry->tx_wait.qlen < LEC_UNRES_QUE_LEN)) { |
288 | pr_debug("%s:queuing packet, MAC address %pM\n" , |
289 | dev->name, lec_h->h_dest); |
290 | skb_queue_tail(list: &entry->tx_wait, newsk: skb); |
291 | } else { |
292 | pr_debug("%s:tx queue full or no arp entry, dropping, MAC address: %pM\n" , |
293 | dev->name, lec_h->h_dest); |
294 | dev->stats.tx_dropped++; |
295 | dev_kfree_skb(skb); |
296 | } |
297 | goto out; |
298 | } |
299 | #if DUMP_PACKETS > 0 |
300 | printk(KERN_DEBUG "%s:sending to vpi:%d vci:%d\n" , |
301 | dev->name, vcc->vpi, vcc->vci); |
302 | #endif /* DUMP_PACKETS > 0 */ |
303 | |
304 | while (entry && (skb2 = skb_dequeue(list: &entry->tx_wait))) { |
305 | pr_debug("emptying tx queue, MAC address %pM\n" , lec_h->h_dest); |
306 | lec_send(vcc, skb: skb2); |
307 | } |
308 | |
309 | lec_send(vcc, skb); |
310 | |
311 | if (!atm_may_send(vcc, size: 0)) { |
312 | struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); |
313 | |
314 | vpriv->xoff = 1; |
315 | netif_stop_queue(dev); |
316 | |
317 | /* |
318 | * vcc->pop() might have occurred in between, making |
319 | * the vcc usuable again. Since xmit is serialized, |
320 | * this is the only situation we have to re-test. |
321 | */ |
322 | |
323 | if (atm_may_send(vcc, size: 0)) |
324 | netif_wake_queue(dev); |
325 | } |
326 | |
327 | out: |
328 | if (entry) |
329 | lec_arp_put(entry); |
330 | netif_trans_update(dev); |
331 | return NETDEV_TX_OK; |
332 | } |
333 | |
334 | /* The inverse routine to net_open(). */ |
335 | static int lec_close(struct net_device *dev) |
336 | { |
337 | netif_stop_queue(dev); |
338 | return 0; |
339 | } |
340 | |
341 | static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb) |
342 | { |
343 | static const u8 zero_addr[ETH_ALEN] = {}; |
344 | unsigned long flags; |
345 | struct net_device *dev = (struct net_device *)vcc->proto_data; |
346 | struct lec_priv *priv = netdev_priv(dev); |
347 | struct atmlec_msg *mesg; |
348 | struct lec_arp_table *entry; |
349 | char *tmp; /* FIXME */ |
350 | |
351 | WARN_ON(refcount_sub_and_test(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc)); |
352 | mesg = (struct atmlec_msg *)skb->data; |
353 | tmp = skb->data; |
354 | tmp += sizeof(struct atmlec_msg); |
355 | pr_debug("%s: msg from zeppelin:%d\n" , dev->name, mesg->type); |
356 | switch (mesg->type) { |
357 | case l_set_mac_addr: |
358 | eth_hw_addr_set(dev, addr: mesg->content.normal.mac_addr); |
359 | break; |
360 | case l_del_mac_addr: |
361 | eth_hw_addr_set(dev, addr: zero_addr); |
362 | break; |
363 | case l_addr_delete: |
364 | lec_addr_delete(priv, atm_addr: mesg->content.normal.atm_addr, |
365 | permanent: mesg->content.normal.flag); |
366 | break; |
367 | case l_topology_change: |
368 | priv->topology_change = mesg->content.normal.flag; |
369 | break; |
370 | case l_flush_complete: |
371 | lec_flush_complete(priv, tran_id: mesg->content.normal.flag); |
372 | break; |
373 | case l_narp_req: /* LANE2: see 7.1.35 in the lane2 spec */ |
374 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
375 | entry = lec_arp_find(priv, mac_addr: mesg->content.normal.mac_addr); |
376 | lec_arp_remove(priv, to_remove: entry); |
377 | spin_unlock_irqrestore(lock: &priv->lec_arp_lock, flags); |
378 | |
379 | if (mesg->content.normal.no_source_le_narp) |
380 | break; |
381 | fallthrough; |
382 | case l_arp_update: |
383 | lec_arp_update(priv, mac_addr: mesg->content.normal.mac_addr, |
384 | atm_addr: mesg->content.normal.atm_addr, |
385 | remoteflag: mesg->content.normal.flag, |
386 | targetless_le_arp: mesg->content.normal.targetless_le_arp); |
387 | pr_debug("in l_arp_update\n" ); |
388 | if (mesg->sizeoftlvs != 0) { /* LANE2 3.1.5 */ |
389 | pr_debug("LANE2 3.1.5, got tlvs, size %d\n" , |
390 | mesg->sizeoftlvs); |
391 | lane2_associate_ind(dev, mac_address: mesg->content.normal.mac_addr, |
392 | tlvs: tmp, sizeoftlvs: mesg->sizeoftlvs); |
393 | } |
394 | break; |
395 | case l_config: |
396 | priv->maximum_unknown_frame_count = |
397 | mesg->content.config.maximum_unknown_frame_count; |
398 | priv->max_unknown_frame_time = |
399 | (mesg->content.config.max_unknown_frame_time * HZ); |
400 | priv->max_retry_count = mesg->content.config.max_retry_count; |
401 | priv->aging_time = (mesg->content.config.aging_time * HZ); |
402 | priv->forward_delay_time = |
403 | (mesg->content.config.forward_delay_time * HZ); |
404 | priv->arp_response_time = |
405 | (mesg->content.config.arp_response_time * HZ); |
406 | priv->flush_timeout = (mesg->content.config.flush_timeout * HZ); |
407 | priv->path_switching_delay = |
408 | (mesg->content.config.path_switching_delay * HZ); |
409 | priv->lane_version = mesg->content.config.lane_version; |
410 | /* LANE2 */ |
411 | priv->lane2_ops = NULL; |
412 | if (priv->lane_version > 1) |
413 | priv->lane2_ops = &lane2_ops; |
414 | rtnl_lock(); |
415 | if (dev_set_mtu(dev, mesg->content.config.mtu)) |
416 | pr_info("%s: change_mtu to %d failed\n" , |
417 | dev->name, mesg->content.config.mtu); |
418 | rtnl_unlock(); |
419 | priv->is_proxy = mesg->content.config.is_proxy; |
420 | break; |
421 | case l_flush_tran_id: |
422 | lec_set_flush_tran_id(priv, atm_addr: mesg->content.normal.atm_addr, |
423 | tran_id: mesg->content.normal.flag); |
424 | break; |
425 | case l_set_lecid: |
426 | priv->lecid = |
427 | (unsigned short)(0xffff & mesg->content.normal.flag); |
428 | break; |
429 | case l_should_bridge: |
430 | #if IS_ENABLED(CONFIG_BRIDGE) |
431 | { |
432 | pr_debug("%s: bridge zeppelin asks about %pM\n" , |
433 | dev->name, mesg->content.proxy.mac_addr); |
434 | |
435 | if (br_fdb_test_addr_hook == NULL) |
436 | break; |
437 | |
438 | if (br_fdb_test_addr_hook(dev, mesg->content.proxy.mac_addr)) { |
439 | /* hit from bridge table, send LE_ARP_RESPONSE */ |
440 | struct sk_buff *skb2; |
441 | struct sock *sk; |
442 | |
443 | pr_debug("%s: entry found, responding to zeppelin\n" , |
444 | dev->name); |
445 | skb2 = alloc_skb(size: sizeof(struct atmlec_msg), GFP_ATOMIC); |
446 | if (skb2 == NULL) |
447 | break; |
448 | skb2->len = sizeof(struct atmlec_msg); |
449 | skb_copy_to_linear_data(skb: skb2, from: mesg, len: sizeof(*mesg)); |
450 | atm_force_charge(vcc: priv->lecd, truesize: skb2->truesize); |
451 | sk = sk_atm(vcc: priv->lecd); |
452 | skb_queue_tail(list: &sk->sk_receive_queue, newsk: skb2); |
453 | sk->sk_data_ready(sk); |
454 | } |
455 | } |
456 | #endif /* IS_ENABLED(CONFIG_BRIDGE) */ |
457 | break; |
458 | default: |
459 | pr_info("%s: Unknown message type %d\n" , dev->name, mesg->type); |
460 | dev_kfree_skb(skb); |
461 | return -EINVAL; |
462 | } |
463 | dev_kfree_skb(skb); |
464 | return 0; |
465 | } |
466 | |
467 | static void lec_atm_close(struct atm_vcc *vcc) |
468 | { |
469 | struct sk_buff *skb; |
470 | struct net_device *dev = (struct net_device *)vcc->proto_data; |
471 | struct lec_priv *priv = netdev_priv(dev); |
472 | |
473 | priv->lecd = NULL; |
474 | /* Do something needful? */ |
475 | |
476 | netif_stop_queue(dev); |
477 | lec_arp_destroy(priv); |
478 | |
479 | if (skb_peek(list_: &sk_atm(vcc)->sk_receive_queue)) |
480 | pr_info("%s closing with messages pending\n" , dev->name); |
481 | while ((skb = skb_dequeue(list: &sk_atm(vcc)->sk_receive_queue))) { |
482 | atm_return(vcc, truesize: skb->truesize); |
483 | dev_kfree_skb(skb); |
484 | } |
485 | |
486 | pr_info("%s: Shut down!\n" , dev->name); |
487 | module_put(THIS_MODULE); |
488 | } |
489 | |
490 | static const struct atmdev_ops lecdev_ops = { |
491 | .close = lec_atm_close, |
492 | .send = lec_atm_send |
493 | }; |
494 | |
495 | static struct atm_dev lecatm_dev = { |
496 | .ops = &lecdev_ops, |
497 | .type = "lec" , |
498 | .number = 999, /* dummy device number */ |
499 | .lock = __SPIN_LOCK_UNLOCKED(lecatm_dev.lock) |
500 | }; |
501 | |
502 | /* |
503 | * LANE2: new argument struct sk_buff *data contains |
504 | * the LE_ARP based TLVs introduced in the LANE2 spec |
505 | */ |
506 | static int |
507 | send_to_lecd(struct lec_priv *priv, atmlec_msg_type type, |
508 | const unsigned char *mac_addr, const unsigned char *atm_addr, |
509 | struct sk_buff *data) |
510 | { |
511 | struct sock *sk; |
512 | struct sk_buff *skb; |
513 | struct atmlec_msg *mesg; |
514 | |
515 | if (!priv || !priv->lecd) |
516 | return -1; |
517 | skb = alloc_skb(size: sizeof(struct atmlec_msg), GFP_ATOMIC); |
518 | if (!skb) |
519 | return -1; |
520 | skb->len = sizeof(struct atmlec_msg); |
521 | mesg = (struct atmlec_msg *)skb->data; |
522 | memset(mesg, 0, sizeof(struct atmlec_msg)); |
523 | mesg->type = type; |
524 | if (data != NULL) |
525 | mesg->sizeoftlvs = data->len; |
526 | if (mac_addr) |
527 | ether_addr_copy(dst: mesg->content.normal.mac_addr, src: mac_addr); |
528 | else |
529 | mesg->content.normal.targetless_le_arp = 1; |
530 | if (atm_addr) |
531 | memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN); |
532 | |
533 | atm_force_charge(vcc: priv->lecd, truesize: skb->truesize); |
534 | sk = sk_atm(vcc: priv->lecd); |
535 | skb_queue_tail(list: &sk->sk_receive_queue, newsk: skb); |
536 | sk->sk_data_ready(sk); |
537 | |
538 | if (data != NULL) { |
539 | pr_debug("about to send %d bytes of data\n" , data->len); |
540 | atm_force_charge(vcc: priv->lecd, truesize: data->truesize); |
541 | skb_queue_tail(list: &sk->sk_receive_queue, newsk: data); |
542 | sk->sk_data_ready(sk); |
543 | } |
544 | |
545 | return 0; |
546 | } |
547 | |
548 | static void lec_set_multicast_list(struct net_device *dev) |
549 | { |
550 | /* |
551 | * by default, all multicast frames arrive over the bus. |
552 | * eventually support selective multicast service |
553 | */ |
554 | } |
555 | |
556 | static const struct net_device_ops lec_netdev_ops = { |
557 | .ndo_open = lec_open, |
558 | .ndo_stop = lec_close, |
559 | .ndo_start_xmit = lec_start_xmit, |
560 | .ndo_tx_timeout = lec_tx_timeout, |
561 | .ndo_set_rx_mode = lec_set_multicast_list, |
562 | }; |
563 | |
564 | static const unsigned char lec_ctrl_magic[] = { |
565 | 0xff, |
566 | 0x00, |
567 | 0x01, |
568 | 0x01 |
569 | }; |
570 | |
571 | #define LEC_DATA_DIRECT_8023 2 |
572 | #define LEC_DATA_DIRECT_8025 3 |
573 | |
574 | static int lec_is_data_direct(struct atm_vcc *vcc) |
575 | { |
576 | return ((vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8023) || |
577 | (vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8025)); |
578 | } |
579 | |
580 | static void lec_push(struct atm_vcc *vcc, struct sk_buff *skb) |
581 | { |
582 | unsigned long flags; |
583 | struct net_device *dev = (struct net_device *)vcc->proto_data; |
584 | struct lec_priv *priv = netdev_priv(dev); |
585 | |
586 | #if DUMP_PACKETS > 0 |
587 | printk(KERN_DEBUG "%s: vcc vpi:%d vci:%d\n" , |
588 | dev->name, vcc->vpi, vcc->vci); |
589 | #endif |
590 | if (!skb) { |
591 | pr_debug("%s: null skb\n" , dev->name); |
592 | lec_vcc_close(priv, vcc); |
593 | return; |
594 | } |
595 | #if DUMP_PACKETS >= 2 |
596 | #define MAX_SKB_DUMP 99 |
597 | #elif DUMP_PACKETS >= 1 |
598 | #define MAX_SKB_DUMP 30 |
599 | #endif |
600 | #if DUMP_PACKETS > 0 |
601 | printk(KERN_DEBUG "%s: rcv datalen:%ld lecid:%4.4x\n" , |
602 | dev->name, skb->len, priv->lecid); |
603 | print_hex_dump(KERN_DEBUG, "" , DUMP_OFFSET, 16, 1, |
604 | skb->data, min(MAX_SKB_DUMP, skb->len), true); |
605 | #endif /* DUMP_PACKETS > 0 */ |
606 | if (memcmp(p: skb->data, q: lec_ctrl_magic, size: 4) == 0) { |
607 | /* Control frame, to daemon */ |
608 | struct sock *sk = sk_atm(vcc); |
609 | |
610 | pr_debug("%s: To daemon\n" , dev->name); |
611 | skb_queue_tail(list: &sk->sk_receive_queue, newsk: skb); |
612 | sk->sk_data_ready(sk); |
613 | } else { /* Data frame, queue to protocol handlers */ |
614 | struct lec_arp_table *entry; |
615 | unsigned char *src, *dst; |
616 | |
617 | atm_return(vcc, truesize: skb->truesize); |
618 | if (*(__be16 *) skb->data == htons(priv->lecid) || |
619 | !priv->lecd || !(dev->flags & IFF_UP)) { |
620 | /* |
621 | * Probably looping back, or if lecd is missing, |
622 | * lecd has gone down |
623 | */ |
624 | pr_debug("Ignoring frame...\n" ); |
625 | dev_kfree_skb(skb); |
626 | return; |
627 | } |
628 | dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest; |
629 | |
630 | /* |
631 | * If this is a Data Direct VCC, and the VCC does not match |
632 | * the LE_ARP cache entry, delete the LE_ARP cache entry. |
633 | */ |
634 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
635 | if (lec_is_data_direct(vcc)) { |
636 | src = ((struct lecdatahdr_8023 *)skb->data)->h_source; |
637 | entry = lec_arp_find(priv, mac_addr: src); |
638 | if (entry && entry->vcc != vcc) { |
639 | lec_arp_remove(priv, to_remove: entry); |
640 | lec_arp_put(entry); |
641 | } |
642 | } |
643 | spin_unlock_irqrestore(lock: &priv->lec_arp_lock, flags); |
644 | |
645 | if (!(dst[0] & 0x01) && /* Never filter Multi/Broadcast */ |
646 | !priv->is_proxy && /* Proxy wants all the packets */ |
647 | memcmp(p: dst, q: dev->dev_addr, size: dev->addr_len)) { |
648 | dev_kfree_skb(skb); |
649 | return; |
650 | } |
651 | if (!hlist_empty(h: &priv->lec_arp_empty_ones)) |
652 | lec_arp_check_empties(priv, vcc, skb); |
653 | skb_pull(skb, len: 2); /* skip lec_id */ |
654 | skb->protocol = eth_type_trans(skb, dev); |
655 | dev->stats.rx_packets++; |
656 | dev->stats.rx_bytes += skb->len; |
657 | memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data)); |
658 | netif_rx(skb); |
659 | } |
660 | } |
661 | |
662 | static void lec_pop(struct atm_vcc *vcc, struct sk_buff *skb) |
663 | { |
664 | struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); |
665 | struct net_device *dev = skb->dev; |
666 | |
667 | if (vpriv == NULL) { |
668 | pr_info("vpriv = NULL!?!?!?\n" ); |
669 | return; |
670 | } |
671 | |
672 | vpriv->old_pop(vcc, skb); |
673 | |
674 | if (vpriv->xoff && atm_may_send(vcc, size: 0)) { |
675 | vpriv->xoff = 0; |
676 | if (netif_running(dev) && netif_queue_stopped(dev)) |
677 | netif_wake_queue(dev); |
678 | } |
679 | } |
680 | |
681 | static int lec_vcc_attach(struct atm_vcc *vcc, void __user *arg) |
682 | { |
683 | struct lec_vcc_priv *vpriv; |
684 | int bytes_left; |
685 | struct atmlec_ioc ioc_data; |
686 | |
687 | /* Lecd must be up in this case */ |
688 | bytes_left = copy_from_user(to: &ioc_data, from: arg, n: sizeof(struct atmlec_ioc)); |
689 | if (bytes_left != 0) |
690 | pr_info("copy from user failed for %d bytes\n" , bytes_left); |
691 | if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF) |
692 | return -EINVAL; |
693 | ioc_data.dev_num = array_index_nospec(ioc_data.dev_num, MAX_LEC_ITF); |
694 | if (!dev_lec[ioc_data.dev_num]) |
695 | return -EINVAL; |
696 | vpriv = kmalloc(size: sizeof(struct lec_vcc_priv), GFP_KERNEL); |
697 | if (!vpriv) |
698 | return -ENOMEM; |
699 | vpriv->xoff = 0; |
700 | vpriv->old_pop = vcc->pop; |
701 | vcc->user_back = vpriv; |
702 | vcc->pop = lec_pop; |
703 | lec_vcc_added(priv: netdev_priv(dev: dev_lec[ioc_data.dev_num]), |
704 | ioc_data: &ioc_data, vcc, old_push: vcc->push); |
705 | vcc->proto_data = dev_lec[ioc_data.dev_num]; |
706 | vcc->push = lec_push; |
707 | return 0; |
708 | } |
709 | |
710 | static int lec_mcast_attach(struct atm_vcc *vcc, int arg) |
711 | { |
712 | if (arg < 0 || arg >= MAX_LEC_ITF) |
713 | return -EINVAL; |
714 | arg = array_index_nospec(arg, MAX_LEC_ITF); |
715 | if (!dev_lec[arg]) |
716 | return -EINVAL; |
717 | vcc->proto_data = dev_lec[arg]; |
718 | return lec_mcast_make(priv: netdev_priv(dev: dev_lec[arg]), vcc); |
719 | } |
720 | |
721 | /* Initialize device. */ |
722 | static int lecd_attach(struct atm_vcc *vcc, int arg) |
723 | { |
724 | int i; |
725 | struct lec_priv *priv; |
726 | |
727 | if (arg < 0) |
728 | arg = 0; |
729 | if (arg >= MAX_LEC_ITF) |
730 | return -EINVAL; |
731 | i = array_index_nospec(arg, MAX_LEC_ITF); |
732 | if (!dev_lec[i]) { |
733 | int size; |
734 | |
735 | size = sizeof(struct lec_priv); |
736 | dev_lec[i] = alloc_etherdev(size); |
737 | if (!dev_lec[i]) |
738 | return -ENOMEM; |
739 | dev_lec[i]->netdev_ops = &lec_netdev_ops; |
740 | dev_lec[i]->max_mtu = 18190; |
741 | snprintf(buf: dev_lec[i]->name, IFNAMSIZ, fmt: "lec%d" , i); |
742 | if (register_netdev(dev: dev_lec[i])) { |
743 | free_netdev(dev: dev_lec[i]); |
744 | return -EINVAL; |
745 | } |
746 | |
747 | priv = netdev_priv(dev: dev_lec[i]); |
748 | } else { |
749 | priv = netdev_priv(dev: dev_lec[i]); |
750 | if (priv->lecd) |
751 | return -EADDRINUSE; |
752 | } |
753 | lec_arp_init(priv); |
754 | priv->itfnum = i; /* LANE2 addition */ |
755 | priv->lecd = vcc; |
756 | vcc->dev = &lecatm_dev; |
757 | vcc_insert_socket(sk: sk_atm(vcc)); |
758 | |
759 | vcc->proto_data = dev_lec[i]; |
760 | set_bit(nr: ATM_VF_META, addr: &vcc->flags); |
761 | set_bit(nr: ATM_VF_READY, addr: &vcc->flags); |
762 | |
763 | /* Set default values to these variables */ |
764 | priv->maximum_unknown_frame_count = 1; |
765 | priv->max_unknown_frame_time = (1 * HZ); |
766 | priv->vcc_timeout_period = (1200 * HZ); |
767 | priv->max_retry_count = 1; |
768 | priv->aging_time = (300 * HZ); |
769 | priv->forward_delay_time = (15 * HZ); |
770 | priv->topology_change = 0; |
771 | priv->arp_response_time = (1 * HZ); |
772 | priv->flush_timeout = (4 * HZ); |
773 | priv->path_switching_delay = (6 * HZ); |
774 | |
775 | if (dev_lec[i]->flags & IFF_UP) |
776 | netif_start_queue(dev: dev_lec[i]); |
777 | __module_get(THIS_MODULE); |
778 | return i; |
779 | } |
780 | |
781 | #ifdef CONFIG_PROC_FS |
782 | static const char *lec_arp_get_status_string(unsigned char status) |
783 | { |
784 | static const char *const lec_arp_status_string[] = { |
785 | "ESI_UNKNOWN " , |
786 | "ESI_ARP_PENDING " , |
787 | "ESI_VC_PENDING " , |
788 | "<Undefined> " , |
789 | "ESI_FLUSH_PENDING " , |
790 | "ESI_FORWARD_DIRECT" |
791 | }; |
792 | |
793 | if (status > ESI_FORWARD_DIRECT) |
794 | status = 3; /* ESI_UNDEFINED */ |
795 | return lec_arp_status_string[status]; |
796 | } |
797 | |
798 | static void lec_info(struct seq_file *seq, struct lec_arp_table *entry) |
799 | { |
800 | seq_printf(m: seq, fmt: "%pM " , entry->mac_addr); |
801 | seq_printf(m: seq, fmt: "%*phN " , ATM_ESA_LEN, entry->atm_addr); |
802 | seq_printf(m: seq, fmt: "%s %4.4x" , lec_arp_get_status_string(status: entry->status), |
803 | entry->flags & 0xffff); |
804 | if (entry->vcc) |
805 | seq_printf(m: seq, fmt: "%3d %3d " , entry->vcc->vpi, entry->vcc->vci); |
806 | else |
807 | seq_printf(m: seq, fmt: " " ); |
808 | if (entry->recv_vcc) { |
809 | seq_printf(m: seq, fmt: " %3d %3d" , entry->recv_vcc->vpi, |
810 | entry->recv_vcc->vci); |
811 | } |
812 | seq_putc(m: seq, c: '\n'); |
813 | } |
814 | |
815 | struct lec_state { |
816 | unsigned long flags; |
817 | struct lec_priv *locked; |
818 | struct hlist_node *node; |
819 | struct net_device *dev; |
820 | int itf; |
821 | int arp_table; |
822 | int misc_table; |
823 | }; |
824 | |
825 | static void *lec_tbl_walk(struct lec_state *state, struct hlist_head *tbl, |
826 | loff_t *l) |
827 | { |
828 | struct hlist_node *e = state->node; |
829 | |
830 | if (!e) |
831 | e = tbl->first; |
832 | if (e == SEQ_START_TOKEN) { |
833 | e = tbl->first; |
834 | --*l; |
835 | } |
836 | |
837 | for (; e; e = e->next) { |
838 | if (--*l < 0) |
839 | break; |
840 | } |
841 | state->node = e; |
842 | |
843 | return (*l < 0) ? state : NULL; |
844 | } |
845 | |
846 | static void *lec_arp_walk(struct lec_state *state, loff_t *l, |
847 | struct lec_priv *priv) |
848 | { |
849 | void *v = NULL; |
850 | int p; |
851 | |
852 | for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) { |
853 | v = lec_tbl_walk(state, tbl: &priv->lec_arp_tables[p], l); |
854 | if (v) |
855 | break; |
856 | } |
857 | state->arp_table = p; |
858 | return v; |
859 | } |
860 | |
861 | static void *lec_misc_walk(struct lec_state *state, loff_t *l, |
862 | struct lec_priv *priv) |
863 | { |
864 | struct hlist_head *lec_misc_tables[] = { |
865 | &priv->lec_arp_empty_ones, |
866 | &priv->lec_no_forward, |
867 | &priv->mcast_fwds |
868 | }; |
869 | void *v = NULL; |
870 | int q; |
871 | |
872 | for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) { |
873 | v = lec_tbl_walk(state, tbl: lec_misc_tables[q], l); |
874 | if (v) |
875 | break; |
876 | } |
877 | state->misc_table = q; |
878 | return v; |
879 | } |
880 | |
881 | static void *lec_priv_walk(struct lec_state *state, loff_t *l, |
882 | struct lec_priv *priv) |
883 | { |
884 | if (!state->locked) { |
885 | state->locked = priv; |
886 | spin_lock_irqsave(&priv->lec_arp_lock, state->flags); |
887 | } |
888 | if (!lec_arp_walk(state, l, priv) && !lec_misc_walk(state, l, priv)) { |
889 | spin_unlock_irqrestore(lock: &priv->lec_arp_lock, flags: state->flags); |
890 | state->locked = NULL; |
891 | /* Partial state reset for the next time we get called */ |
892 | state->arp_table = state->misc_table = 0; |
893 | } |
894 | return state->locked; |
895 | } |
896 | |
897 | static void *lec_itf_walk(struct lec_state *state, loff_t *l) |
898 | { |
899 | struct net_device *dev; |
900 | void *v; |
901 | |
902 | dev = state->dev ? state->dev : dev_lec[state->itf]; |
903 | v = (dev && netdev_priv(dev)) ? |
904 | lec_priv_walk(state, l, priv: netdev_priv(dev)) : NULL; |
905 | if (!v && dev) { |
906 | dev_put(dev); |
907 | /* Partial state reset for the next time we get called */ |
908 | dev = NULL; |
909 | } |
910 | state->dev = dev; |
911 | return v; |
912 | } |
913 | |
914 | static void *lec_get_idx(struct lec_state *state, loff_t l) |
915 | { |
916 | void *v = NULL; |
917 | |
918 | for (; state->itf < MAX_LEC_ITF; state->itf++) { |
919 | v = lec_itf_walk(state, l: &l); |
920 | if (v) |
921 | break; |
922 | } |
923 | return v; |
924 | } |
925 | |
926 | static void *lec_seq_start(struct seq_file *seq, loff_t *pos) |
927 | { |
928 | struct lec_state *state = seq->private; |
929 | |
930 | state->itf = 0; |
931 | state->dev = NULL; |
932 | state->locked = NULL; |
933 | state->arp_table = 0; |
934 | state->misc_table = 0; |
935 | state->node = SEQ_START_TOKEN; |
936 | |
937 | return *pos ? lec_get_idx(state, l: *pos) : SEQ_START_TOKEN; |
938 | } |
939 | |
940 | static void lec_seq_stop(struct seq_file *seq, void *v) |
941 | { |
942 | struct lec_state *state = seq->private; |
943 | |
944 | if (state->dev) { |
945 | spin_unlock_irqrestore(lock: &state->locked->lec_arp_lock, |
946 | flags: state->flags); |
947 | dev_put(dev: state->dev); |
948 | } |
949 | } |
950 | |
951 | static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
952 | { |
953 | struct lec_state *state = seq->private; |
954 | |
955 | ++*pos; |
956 | return lec_get_idx(state, l: 1); |
957 | } |
958 | |
959 | static int lec_seq_show(struct seq_file *seq, void *v) |
960 | { |
961 | static const char lec_banner[] = |
962 | "Itf MAC ATM destination" |
963 | " Status Flags " |
964 | "VPI/VCI Recv VPI/VCI\n" ; |
965 | |
966 | if (v == SEQ_START_TOKEN) |
967 | seq_puts(m: seq, s: lec_banner); |
968 | else { |
969 | struct lec_state *state = seq->private; |
970 | struct net_device *dev = state->dev; |
971 | struct lec_arp_table *entry = hlist_entry(state->node, |
972 | struct lec_arp_table, |
973 | next); |
974 | |
975 | seq_printf(m: seq, fmt: "%s " , dev->name); |
976 | lec_info(seq, entry); |
977 | } |
978 | return 0; |
979 | } |
980 | |
981 | static const struct seq_operations lec_seq_ops = { |
982 | .start = lec_seq_start, |
983 | .next = lec_seq_next, |
984 | .stop = lec_seq_stop, |
985 | .show = lec_seq_show, |
986 | }; |
987 | #endif |
988 | |
989 | static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
990 | { |
991 | struct atm_vcc *vcc = ATM_SD(sock); |
992 | int err = 0; |
993 | |
994 | switch (cmd) { |
995 | case ATMLEC_CTRL: |
996 | case ATMLEC_MCAST: |
997 | case ATMLEC_DATA: |
998 | if (!capable(CAP_NET_ADMIN)) |
999 | return -EPERM; |
1000 | break; |
1001 | default: |
1002 | return -ENOIOCTLCMD; |
1003 | } |
1004 | |
1005 | switch (cmd) { |
1006 | case ATMLEC_CTRL: |
1007 | err = lecd_attach(vcc, arg: (int)arg); |
1008 | if (err >= 0) |
1009 | sock->state = SS_CONNECTED; |
1010 | break; |
1011 | case ATMLEC_MCAST: |
1012 | err = lec_mcast_attach(vcc, arg: (int)arg); |
1013 | break; |
1014 | case ATMLEC_DATA: |
1015 | err = lec_vcc_attach(vcc, arg: (void __user *)arg); |
1016 | break; |
1017 | } |
1018 | |
1019 | return err; |
1020 | } |
1021 | |
1022 | static struct atm_ioctl lane_ioctl_ops = { |
1023 | .owner = THIS_MODULE, |
1024 | .ioctl = lane_ioctl, |
1025 | }; |
1026 | |
1027 | static int __init lane_module_init(void) |
1028 | { |
1029 | #ifdef CONFIG_PROC_FS |
1030 | struct proc_dir_entry *p; |
1031 | |
1032 | p = proc_create_seq_private(name: "lec" , mode: 0444, parent: atm_proc_root, ops: &lec_seq_ops, |
1033 | state_size: sizeof(struct lec_state), NULL); |
1034 | if (!p) { |
1035 | pr_err("Unable to initialize /proc/net/atm/lec\n" ); |
1036 | return -ENOMEM; |
1037 | } |
1038 | #endif |
1039 | |
1040 | register_atm_ioctl(&lane_ioctl_ops); |
1041 | pr_info("lec.c: initialized\n" ); |
1042 | return 0; |
1043 | } |
1044 | |
1045 | static void __exit lane_module_cleanup(void) |
1046 | { |
1047 | int i; |
1048 | |
1049 | #ifdef CONFIG_PROC_FS |
1050 | remove_proc_entry("lec" , atm_proc_root); |
1051 | #endif |
1052 | |
1053 | deregister_atm_ioctl(&lane_ioctl_ops); |
1054 | |
1055 | for (i = 0; i < MAX_LEC_ITF; i++) { |
1056 | if (dev_lec[i] != NULL) { |
1057 | unregister_netdev(dev: dev_lec[i]); |
1058 | free_netdev(dev: dev_lec[i]); |
1059 | dev_lec[i] = NULL; |
1060 | } |
1061 | } |
1062 | } |
1063 | |
1064 | module_init(lane_module_init); |
1065 | module_exit(lane_module_cleanup); |
1066 | |
1067 | /* |
1068 | * LANE2: 3.1.3, LE_RESOLVE.request |
1069 | * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs. |
1070 | * If sizeoftlvs == NULL the default TLVs associated with this |
1071 | * lec will be used. |
1072 | * If dst_mac == NULL, targetless LE_ARP will be sent |
1073 | */ |
1074 | static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force, |
1075 | u8 **tlvs, u32 *sizeoftlvs) |
1076 | { |
1077 | unsigned long flags; |
1078 | struct lec_priv *priv = netdev_priv(dev); |
1079 | struct lec_arp_table *table; |
1080 | struct sk_buff *skb; |
1081 | int retval; |
1082 | |
1083 | if (force == 0) { |
1084 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
1085 | table = lec_arp_find(priv, mac_addr: dst_mac); |
1086 | spin_unlock_irqrestore(lock: &priv->lec_arp_lock, flags); |
1087 | if (table == NULL) |
1088 | return -1; |
1089 | |
1090 | *tlvs = kmemdup(p: table->tlvs, size: table->sizeoftlvs, GFP_ATOMIC); |
1091 | if (*tlvs == NULL) |
1092 | return -1; |
1093 | |
1094 | *sizeoftlvs = table->sizeoftlvs; |
1095 | |
1096 | return 0; |
1097 | } |
1098 | |
1099 | if (sizeoftlvs == NULL) |
1100 | retval = send_to_lecd(priv, type: l_arp_xmt, mac_addr: dst_mac, NULL, NULL); |
1101 | |
1102 | else { |
1103 | skb = alloc_skb(size: *sizeoftlvs, GFP_ATOMIC); |
1104 | if (skb == NULL) |
1105 | return -1; |
1106 | skb->len = *sizeoftlvs; |
1107 | skb_copy_to_linear_data(skb, from: *tlvs, len: *sizeoftlvs); |
1108 | retval = send_to_lecd(priv, type: l_arp_xmt, mac_addr: dst_mac, NULL, data: skb); |
1109 | } |
1110 | return retval; |
1111 | } |
1112 | |
1113 | /* |
1114 | * LANE2: 3.1.4, LE_ASSOCIATE.request |
1115 | * Associate the *tlvs with the *lan_dst address. |
1116 | * Will overwrite any previous association |
1117 | * Returns 1 for success, 0 for failure (out of memory) |
1118 | * |
1119 | */ |
1120 | static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst, |
1121 | const u8 *tlvs, u32 sizeoftlvs) |
1122 | { |
1123 | int retval; |
1124 | struct sk_buff *skb; |
1125 | struct lec_priv *priv = netdev_priv(dev); |
1126 | |
1127 | if (!ether_addr_equal(addr1: lan_dst, addr2: dev->dev_addr)) |
1128 | return 0; /* not our mac address */ |
1129 | |
1130 | kfree(objp: priv->tlvs); /* NULL if there was no previous association */ |
1131 | |
1132 | priv->tlvs = kmemdup(p: tlvs, size: sizeoftlvs, GFP_KERNEL); |
1133 | if (priv->tlvs == NULL) |
1134 | return 0; |
1135 | priv->sizeoftlvs = sizeoftlvs; |
1136 | |
1137 | skb = alloc_skb(size: sizeoftlvs, GFP_ATOMIC); |
1138 | if (skb == NULL) |
1139 | return 0; |
1140 | skb->len = sizeoftlvs; |
1141 | skb_copy_to_linear_data(skb, from: tlvs, len: sizeoftlvs); |
1142 | retval = send_to_lecd(priv, type: l_associate_req, NULL, NULL, data: skb); |
1143 | if (retval != 0) |
1144 | pr_info("lec.c: lane2_associate_req() failed\n" ); |
1145 | /* |
1146 | * If the previous association has changed we must |
1147 | * somehow notify other LANE entities about the change |
1148 | */ |
1149 | return 1; |
1150 | } |
1151 | |
1152 | /* |
1153 | * LANE2: 3.1.5, LE_ASSOCIATE.indication |
1154 | * |
1155 | */ |
1156 | static void lane2_associate_ind(struct net_device *dev, const u8 *mac_addr, |
1157 | const u8 *tlvs, u32 sizeoftlvs) |
1158 | { |
1159 | #if 0 |
1160 | int i = 0; |
1161 | #endif |
1162 | struct lec_priv *priv = netdev_priv(dev); |
1163 | #if 0 /* |
1164 | * Why have the TLVs in LE_ARP entries |
1165 | * since we do not use them? When you |
1166 | * uncomment this code, make sure the |
1167 | * TLVs get freed when entry is killed |
1168 | */ |
1169 | struct lec_arp_table *entry = lec_arp_find(priv, mac_addr); |
1170 | |
1171 | if (entry == NULL) |
1172 | return; /* should not happen */ |
1173 | |
1174 | kfree(entry->tlvs); |
1175 | |
1176 | entry->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL); |
1177 | if (entry->tlvs == NULL) |
1178 | return; |
1179 | entry->sizeoftlvs = sizeoftlvs; |
1180 | #endif |
1181 | #if 0 |
1182 | pr_info("\n" ); |
1183 | pr_info("dump of tlvs, sizeoftlvs=%d\n" , sizeoftlvs); |
1184 | while (i < sizeoftlvs) |
1185 | pr_cont("%02x " , tlvs[i++]); |
1186 | |
1187 | pr_cont("\n" ); |
1188 | #endif |
1189 | |
1190 | /* tell MPOA about the TLVs we saw */ |
1191 | if (priv->lane2_ops && priv->lane2_ops->associate_indicator) { |
1192 | priv->lane2_ops->associate_indicator(dev, mac_addr, |
1193 | tlvs, sizeoftlvs); |
1194 | } |
1195 | } |
1196 | |
1197 | /* |
1198 | * Here starts what used to lec_arpc.c |
1199 | * |
1200 | * lec_arpc.c was added here when making |
1201 | * lane client modular. October 1997 |
1202 | */ |
1203 | |
1204 | #include <linux/types.h> |
1205 | #include <linux/timer.h> |
1206 | #include <linux/param.h> |
1207 | #include <linux/atomic.h> |
1208 | #include <linux/inetdevice.h> |
1209 | #include <net/route.h> |
1210 | |
1211 | #if 0 |
1212 | #define pr_debug(format, args...) |
1213 | /* |
1214 | #define pr_debug printk |
1215 | */ |
1216 | #endif |
1217 | #define DEBUG_ARP_TABLE 0 |
1218 | |
1219 | #define LEC_ARP_REFRESH_INTERVAL (3*HZ) |
1220 | |
1221 | static void lec_arp_check_expire(struct work_struct *work); |
1222 | static void lec_arp_expire_arp(struct timer_list *t); |
1223 | |
1224 | /* |
1225 | * Arp table funcs |
1226 | */ |
1227 | |
1228 | #define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE - 1)) |
1229 | |
1230 | /* |
1231 | * Initialization of arp-cache |
1232 | */ |
1233 | static void lec_arp_init(struct lec_priv *priv) |
1234 | { |
1235 | unsigned short i; |
1236 | |
1237 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) |
1238 | INIT_HLIST_HEAD(&priv->lec_arp_tables[i]); |
1239 | INIT_HLIST_HEAD(&priv->lec_arp_empty_ones); |
1240 | INIT_HLIST_HEAD(&priv->lec_no_forward); |
1241 | INIT_HLIST_HEAD(&priv->mcast_fwds); |
1242 | spin_lock_init(&priv->lec_arp_lock); |
1243 | INIT_DELAYED_WORK(&priv->lec_arp_work, lec_arp_check_expire); |
1244 | schedule_delayed_work(dwork: &priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL); |
1245 | } |
1246 | |
1247 | static void lec_arp_clear_vccs(struct lec_arp_table *entry) |
1248 | { |
1249 | if (entry->vcc) { |
1250 | struct atm_vcc *vcc = entry->vcc; |
1251 | struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); |
1252 | struct net_device *dev = (struct net_device *)vcc->proto_data; |
1253 | |
1254 | vcc->pop = vpriv->old_pop; |
1255 | if (vpriv->xoff) |
1256 | netif_wake_queue(dev); |
1257 | kfree(objp: vpriv); |
1258 | vcc->user_back = NULL; |
1259 | vcc->push = entry->old_push; |
1260 | vcc_release_async(vcc, reply: -EPIPE); |
1261 | entry->vcc = NULL; |
1262 | } |
1263 | if (entry->recv_vcc) { |
1264 | struct atm_vcc *vcc = entry->recv_vcc; |
1265 | struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); |
1266 | |
1267 | kfree(objp: vpriv); |
1268 | vcc->user_back = NULL; |
1269 | |
1270 | entry->recv_vcc->push = entry->old_recv_push; |
1271 | vcc_release_async(vcc: entry->recv_vcc, reply: -EPIPE); |
1272 | entry->recv_vcc = NULL; |
1273 | } |
1274 | } |
1275 | |
1276 | /* |
1277 | * Insert entry to lec_arp_table |
1278 | * LANE2: Add to the end of the list to satisfy 8.1.13 |
1279 | */ |
1280 | static inline void |
1281 | lec_arp_add(struct lec_priv *priv, struct lec_arp_table *entry) |
1282 | { |
1283 | struct hlist_head *tmp; |
1284 | |
1285 | tmp = &priv->lec_arp_tables[HASH(entry->mac_addr[ETH_ALEN - 1])]; |
1286 | hlist_add_head(n: &entry->next, h: tmp); |
1287 | |
1288 | pr_debug("Added entry:%pM\n" , entry->mac_addr); |
1289 | } |
1290 | |
1291 | /* |
1292 | * Remove entry from lec_arp_table |
1293 | */ |
1294 | static int |
1295 | lec_arp_remove(struct lec_priv *priv, struct lec_arp_table *to_remove) |
1296 | { |
1297 | struct lec_arp_table *entry; |
1298 | int i, remove_vcc = 1; |
1299 | |
1300 | if (!to_remove) |
1301 | return -1; |
1302 | |
1303 | hlist_del(n: &to_remove->next); |
1304 | del_timer(timer: &to_remove->timer); |
1305 | |
1306 | /* |
1307 | * If this is the only MAC connected to this VCC, |
1308 | * also tear down the VCC |
1309 | */ |
1310 | if (to_remove->status >= ESI_FLUSH_PENDING) { |
1311 | /* |
1312 | * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT |
1313 | */ |
1314 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
1315 | hlist_for_each_entry(entry, |
1316 | &priv->lec_arp_tables[i], next) { |
1317 | if (memcmp(p: to_remove->atm_addr, |
1318 | q: entry->atm_addr, ATM_ESA_LEN) == 0) { |
1319 | remove_vcc = 0; |
1320 | break; |
1321 | } |
1322 | } |
1323 | } |
1324 | if (remove_vcc) |
1325 | lec_arp_clear_vccs(entry: to_remove); |
1326 | } |
1327 | skb_queue_purge(list: &to_remove->tx_wait); /* FIXME: good place for this? */ |
1328 | |
1329 | pr_debug("Removed entry:%pM\n" , to_remove->mac_addr); |
1330 | return 0; |
1331 | } |
1332 | |
1333 | #if DEBUG_ARP_TABLE |
1334 | static const char *get_status_string(unsigned char st) |
1335 | { |
1336 | switch (st) { |
1337 | case ESI_UNKNOWN: |
1338 | return "ESI_UNKNOWN" ; |
1339 | case ESI_ARP_PENDING: |
1340 | return "ESI_ARP_PENDING" ; |
1341 | case ESI_VC_PENDING: |
1342 | return "ESI_VC_PENDING" ; |
1343 | case ESI_FLUSH_PENDING: |
1344 | return "ESI_FLUSH_PENDING" ; |
1345 | case ESI_FORWARD_DIRECT: |
1346 | return "ESI_FORWARD_DIRECT" ; |
1347 | } |
1348 | return "<UNKNOWN>" ; |
1349 | } |
1350 | |
1351 | static void dump_arp_table(struct lec_priv *priv) |
1352 | { |
1353 | struct lec_arp_table *rulla; |
1354 | char buf[256]; |
1355 | int i, offset; |
1356 | |
1357 | pr_info("Dump %p:\n" , priv); |
1358 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
1359 | hlist_for_each_entry(rulla, |
1360 | &priv->lec_arp_tables[i], next) { |
1361 | offset = 0; |
1362 | offset += sprintf(buf, "%d: %p\n" , i, rulla); |
1363 | offset += sprintf(buf + offset, "Mac: %pM " , |
1364 | rulla->mac_addr); |
1365 | offset += sprintf(buf + offset, "Atm: %*ph " , ATM_ESA_LEN, |
1366 | rulla->atm_addr); |
1367 | offset += sprintf(buf + offset, |
1368 | "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d " , |
1369 | rulla->vcc ? rulla->vcc->vpi : 0, |
1370 | rulla->vcc ? rulla->vcc->vci : 0, |
1371 | rulla->recv_vcc ? rulla->recv_vcc-> |
1372 | vpi : 0, |
1373 | rulla->recv_vcc ? rulla->recv_vcc-> |
1374 | vci : 0, rulla->last_used, |
1375 | rulla->timestamp, rulla->no_tries); |
1376 | offset += |
1377 | sprintf(buf + offset, |
1378 | "Flags:%x, Packets_flooded:%x, Status: %s " , |
1379 | rulla->flags, rulla->packets_flooded, |
1380 | get_status_string(rulla->status)); |
1381 | pr_info("%s\n" , buf); |
1382 | } |
1383 | } |
1384 | |
1385 | if (!hlist_empty(&priv->lec_no_forward)) |
1386 | pr_info("No forward\n" ); |
1387 | hlist_for_each_entry(rulla, &priv->lec_no_forward, next) { |
1388 | offset = 0; |
1389 | offset += sprintf(buf + offset, "Mac: %pM " , rulla->mac_addr); |
1390 | offset += sprintf(buf + offset, "Atm: %*ph " , ATM_ESA_LEN, |
1391 | rulla->atm_addr); |
1392 | offset += sprintf(buf + offset, |
1393 | "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d " , |
1394 | rulla->vcc ? rulla->vcc->vpi : 0, |
1395 | rulla->vcc ? rulla->vcc->vci : 0, |
1396 | rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, |
1397 | rulla->recv_vcc ? rulla->recv_vcc->vci : 0, |
1398 | rulla->last_used, |
1399 | rulla->timestamp, rulla->no_tries); |
1400 | offset += sprintf(buf + offset, |
1401 | "Flags:%x, Packets_flooded:%x, Status: %s " , |
1402 | rulla->flags, rulla->packets_flooded, |
1403 | get_status_string(rulla->status)); |
1404 | pr_info("%s\n" , buf); |
1405 | } |
1406 | |
1407 | if (!hlist_empty(&priv->lec_arp_empty_ones)) |
1408 | pr_info("Empty ones\n" ); |
1409 | hlist_for_each_entry(rulla, &priv->lec_arp_empty_ones, next) { |
1410 | offset = 0; |
1411 | offset += sprintf(buf + offset, "Mac: %pM " , rulla->mac_addr); |
1412 | offset += sprintf(buf + offset, "Atm: %*ph " , ATM_ESA_LEN, |
1413 | rulla->atm_addr); |
1414 | offset += sprintf(buf + offset, |
1415 | "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d " , |
1416 | rulla->vcc ? rulla->vcc->vpi : 0, |
1417 | rulla->vcc ? rulla->vcc->vci : 0, |
1418 | rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, |
1419 | rulla->recv_vcc ? rulla->recv_vcc->vci : 0, |
1420 | rulla->last_used, |
1421 | rulla->timestamp, rulla->no_tries); |
1422 | offset += sprintf(buf + offset, |
1423 | "Flags:%x, Packets_flooded:%x, Status: %s " , |
1424 | rulla->flags, rulla->packets_flooded, |
1425 | get_status_string(rulla->status)); |
1426 | pr_info("%s" , buf); |
1427 | } |
1428 | |
1429 | if (!hlist_empty(&priv->mcast_fwds)) |
1430 | pr_info("Multicast Forward VCCs\n" ); |
1431 | hlist_for_each_entry(rulla, &priv->mcast_fwds, next) { |
1432 | offset = 0; |
1433 | offset += sprintf(buf + offset, "Mac: %pM " , rulla->mac_addr); |
1434 | offset += sprintf(buf + offset, "Atm: %*ph " , ATM_ESA_LEN, |
1435 | rulla->atm_addr); |
1436 | offset += sprintf(buf + offset, |
1437 | "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d " , |
1438 | rulla->vcc ? rulla->vcc->vpi : 0, |
1439 | rulla->vcc ? rulla->vcc->vci : 0, |
1440 | rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, |
1441 | rulla->recv_vcc ? rulla->recv_vcc->vci : 0, |
1442 | rulla->last_used, |
1443 | rulla->timestamp, rulla->no_tries); |
1444 | offset += sprintf(buf + offset, |
1445 | "Flags:%x, Packets_flooded:%x, Status: %s " , |
1446 | rulla->flags, rulla->packets_flooded, |
1447 | get_status_string(rulla->status)); |
1448 | pr_info("%s\n" , buf); |
1449 | } |
1450 | |
1451 | } |
1452 | #else |
1453 | #define dump_arp_table(priv) do { } while (0) |
1454 | #endif |
1455 | |
1456 | /* |
1457 | * Destruction of arp-cache |
1458 | */ |
1459 | static void lec_arp_destroy(struct lec_priv *priv) |
1460 | { |
1461 | unsigned long flags; |
1462 | struct hlist_node *next; |
1463 | struct lec_arp_table *entry; |
1464 | int i; |
1465 | |
1466 | cancel_delayed_work_sync(dwork: &priv->lec_arp_work); |
1467 | |
1468 | /* |
1469 | * Remove all entries |
1470 | */ |
1471 | |
1472 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
1473 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
1474 | hlist_for_each_entry_safe(entry, next, |
1475 | &priv->lec_arp_tables[i], next) { |
1476 | lec_arp_remove(priv, to_remove: entry); |
1477 | lec_arp_put(entry); |
1478 | } |
1479 | INIT_HLIST_HEAD(&priv->lec_arp_tables[i]); |
1480 | } |
1481 | |
1482 | hlist_for_each_entry_safe(entry, next, |
1483 | &priv->lec_arp_empty_ones, next) { |
1484 | del_timer_sync(timer: &entry->timer); |
1485 | lec_arp_clear_vccs(entry); |
1486 | hlist_del(n: &entry->next); |
1487 | lec_arp_put(entry); |
1488 | } |
1489 | INIT_HLIST_HEAD(&priv->lec_arp_empty_ones); |
1490 | |
1491 | hlist_for_each_entry_safe(entry, next, |
1492 | &priv->lec_no_forward, next) { |
1493 | del_timer_sync(timer: &entry->timer); |
1494 | lec_arp_clear_vccs(entry); |
1495 | hlist_del(n: &entry->next); |
1496 | lec_arp_put(entry); |
1497 | } |
1498 | INIT_HLIST_HEAD(&priv->lec_no_forward); |
1499 | |
1500 | hlist_for_each_entry_safe(entry, next, &priv->mcast_fwds, next) { |
1501 | /* No timer, LANEv2 7.1.20 and 2.3.5.3 */ |
1502 | lec_arp_clear_vccs(entry); |
1503 | hlist_del(n: &entry->next); |
1504 | lec_arp_put(entry); |
1505 | } |
1506 | INIT_HLIST_HEAD(&priv->mcast_fwds); |
1507 | priv->mcast_vcc = NULL; |
1508 | spin_unlock_irqrestore(lock: &priv->lec_arp_lock, flags); |
1509 | } |
1510 | |
1511 | /* |
1512 | * Find entry by mac_address |
1513 | */ |
1514 | static struct lec_arp_table *lec_arp_find(struct lec_priv *priv, |
1515 | const unsigned char *mac_addr) |
1516 | { |
1517 | struct hlist_head *head; |
1518 | struct lec_arp_table *entry; |
1519 | |
1520 | pr_debug("%pM\n" , mac_addr); |
1521 | |
1522 | head = &priv->lec_arp_tables[HASH(mac_addr[ETH_ALEN - 1])]; |
1523 | hlist_for_each_entry(entry, head, next) { |
1524 | if (ether_addr_equal(addr1: mac_addr, addr2: entry->mac_addr)) |
1525 | return entry; |
1526 | } |
1527 | return NULL; |
1528 | } |
1529 | |
1530 | static struct lec_arp_table *make_entry(struct lec_priv *priv, |
1531 | const unsigned char *mac_addr) |
1532 | { |
1533 | struct lec_arp_table *to_return; |
1534 | |
1535 | to_return = kzalloc(size: sizeof(struct lec_arp_table), GFP_ATOMIC); |
1536 | if (!to_return) |
1537 | return NULL; |
1538 | ether_addr_copy(dst: to_return->mac_addr, src: mac_addr); |
1539 | INIT_HLIST_NODE(h: &to_return->next); |
1540 | timer_setup(&to_return->timer, lec_arp_expire_arp, 0); |
1541 | to_return->last_used = jiffies; |
1542 | to_return->priv = priv; |
1543 | skb_queue_head_init(list: &to_return->tx_wait); |
1544 | refcount_set(r: &to_return->usage, n: 1); |
1545 | return to_return; |
1546 | } |
1547 | |
1548 | /* Arp sent timer expired */ |
1549 | static void lec_arp_expire_arp(struct timer_list *t) |
1550 | { |
1551 | struct lec_arp_table *entry; |
1552 | |
1553 | entry = from_timer(entry, t, timer); |
1554 | |
1555 | pr_debug("\n" ); |
1556 | if (entry->status == ESI_ARP_PENDING) { |
1557 | if (entry->no_tries <= entry->priv->max_retry_count) { |
1558 | if (entry->is_rdesc) |
1559 | send_to_lecd(priv: entry->priv, type: l_rdesc_arp_xmt, |
1560 | mac_addr: entry->mac_addr, NULL, NULL); |
1561 | else |
1562 | send_to_lecd(priv: entry->priv, type: l_arp_xmt, |
1563 | mac_addr: entry->mac_addr, NULL, NULL); |
1564 | entry->no_tries++; |
1565 | } |
1566 | mod_timer(timer: &entry->timer, expires: jiffies + (1 * HZ)); |
1567 | } |
1568 | } |
1569 | |
1570 | /* Unknown/unused vcc expire, remove associated entry */ |
1571 | static void lec_arp_expire_vcc(struct timer_list *t) |
1572 | { |
1573 | unsigned long flags; |
1574 | struct lec_arp_table *to_remove = from_timer(to_remove, t, timer); |
1575 | struct lec_priv *priv = to_remove->priv; |
1576 | |
1577 | del_timer(timer: &to_remove->timer); |
1578 | |
1579 | pr_debug("%p %p: vpi:%d vci:%d\n" , |
1580 | to_remove, priv, |
1581 | to_remove->vcc ? to_remove->recv_vcc->vpi : 0, |
1582 | to_remove->vcc ? to_remove->recv_vcc->vci : 0); |
1583 | |
1584 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
1585 | hlist_del(n: &to_remove->next); |
1586 | spin_unlock_irqrestore(lock: &priv->lec_arp_lock, flags); |
1587 | |
1588 | lec_arp_clear_vccs(entry: to_remove); |
1589 | lec_arp_put(entry: to_remove); |
1590 | } |
1591 | |
1592 | static bool __lec_arp_check_expire(struct lec_arp_table *entry, |
1593 | unsigned long now, |
1594 | struct lec_priv *priv) |
1595 | { |
1596 | unsigned long time_to_check; |
1597 | |
1598 | if ((entry->flags) & LEC_REMOTE_FLAG && priv->topology_change) |
1599 | time_to_check = priv->forward_delay_time; |
1600 | else |
1601 | time_to_check = priv->aging_time; |
1602 | |
1603 | pr_debug("About to expire: %lx - %lx > %lx\n" , |
1604 | now, entry->last_used, time_to_check); |
1605 | if (time_after(now, entry->last_used + time_to_check) && |
1606 | !(entry->flags & LEC_PERMANENT_FLAG) && |
1607 | !(entry->mac_addr[0] & 0x01)) { /* LANE2: 7.1.20 */ |
1608 | /* Remove entry */ |
1609 | pr_debug("Entry timed out\n" ); |
1610 | lec_arp_remove(priv, to_remove: entry); |
1611 | lec_arp_put(entry); |
1612 | } else { |
1613 | /* Something else */ |
1614 | if ((entry->status == ESI_VC_PENDING || |
1615 | entry->status == ESI_ARP_PENDING) && |
1616 | time_after_eq(now, entry->timestamp + |
1617 | priv->max_unknown_frame_time)) { |
1618 | entry->timestamp = jiffies; |
1619 | entry->packets_flooded = 0; |
1620 | if (entry->status == ESI_VC_PENDING) |
1621 | send_to_lecd(priv, type: l_svc_setup, |
1622 | mac_addr: entry->mac_addr, |
1623 | atm_addr: entry->atm_addr, |
1624 | NULL); |
1625 | } |
1626 | if (entry->status == ESI_FLUSH_PENDING && |
1627 | time_after_eq(now, entry->timestamp + |
1628 | priv->path_switching_delay)) { |
1629 | lec_arp_hold(entry); |
1630 | return true; |
1631 | } |
1632 | } |
1633 | |
1634 | return false; |
1635 | } |
1636 | /* |
1637 | * Expire entries. |
1638 | * 1. Re-set timer |
1639 | * 2. For each entry, delete entries that have aged past the age limit. |
1640 | * 3. For each entry, depending on the status of the entry, perform |
1641 | * the following maintenance. |
1642 | * a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the |
1643 | * tick_count is above the max_unknown_frame_time, clear |
1644 | * the tick_count to zero and clear the packets_flooded counter |
1645 | * to zero. This supports the packet rate limit per address |
1646 | * while flooding unknowns. |
1647 | * b. If the status is ESI_FLUSH_PENDING and the tick_count is greater |
1648 | * than or equal to the path_switching_delay, change the status |
1649 | * to ESI_FORWARD_DIRECT. This causes the flush period to end |
1650 | * regardless of the progress of the flush protocol. |
1651 | */ |
1652 | static void lec_arp_check_expire(struct work_struct *work) |
1653 | { |
1654 | unsigned long flags; |
1655 | struct lec_priv *priv = |
1656 | container_of(work, struct lec_priv, lec_arp_work.work); |
1657 | struct hlist_node *next; |
1658 | struct lec_arp_table *entry; |
1659 | unsigned long now; |
1660 | int i; |
1661 | |
1662 | pr_debug("%p\n" , priv); |
1663 | now = jiffies; |
1664 | restart: |
1665 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
1666 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
1667 | hlist_for_each_entry_safe(entry, next, |
1668 | &priv->lec_arp_tables[i], next) { |
1669 | if (__lec_arp_check_expire(entry, now, priv)) { |
1670 | struct sk_buff *skb; |
1671 | struct atm_vcc *vcc = entry->vcc; |
1672 | |
1673 | spin_unlock_irqrestore(lock: &priv->lec_arp_lock, |
1674 | flags); |
1675 | while ((skb = skb_dequeue(list: &entry->tx_wait))) |
1676 | lec_send(vcc, skb); |
1677 | entry->last_used = jiffies; |
1678 | entry->status = ESI_FORWARD_DIRECT; |
1679 | lec_arp_put(entry); |
1680 | |
1681 | goto restart; |
1682 | } |
1683 | } |
1684 | } |
1685 | spin_unlock_irqrestore(lock: &priv->lec_arp_lock, flags); |
1686 | |
1687 | schedule_delayed_work(dwork: &priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL); |
1688 | } |
1689 | |
1690 | /* |
1691 | * Try to find vcc where mac_address is attached. |
1692 | * |
1693 | */ |
1694 | static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv, |
1695 | const unsigned char *mac_to_find, |
1696 | int is_rdesc, |
1697 | struct lec_arp_table **ret_entry) |
1698 | { |
1699 | unsigned long flags; |
1700 | struct lec_arp_table *entry; |
1701 | struct atm_vcc *found; |
1702 | |
1703 | if (mac_to_find[0] & 0x01) { |
1704 | switch (priv->lane_version) { |
1705 | case 1: |
1706 | return priv->mcast_vcc; |
1707 | case 2: /* LANE2 wants arp for multicast addresses */ |
1708 | if (ether_addr_equal(addr1: mac_to_find, addr2: bus_mac)) |
1709 | return priv->mcast_vcc; |
1710 | break; |
1711 | default: |
1712 | break; |
1713 | } |
1714 | } |
1715 | |
1716 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
1717 | entry = lec_arp_find(priv, mac_addr: mac_to_find); |
1718 | |
1719 | if (entry) { |
1720 | if (entry->status == ESI_FORWARD_DIRECT) { |
1721 | /* Connection Ok */ |
1722 | entry->last_used = jiffies; |
1723 | lec_arp_hold(entry); |
1724 | *ret_entry = entry; |
1725 | found = entry->vcc; |
1726 | goto out; |
1727 | } |
1728 | /* |
1729 | * If the LE_ARP cache entry is still pending, reset count to 0 |
1730 | * so another LE_ARP request can be made for this frame. |
1731 | */ |
1732 | if (entry->status == ESI_ARP_PENDING) |
1733 | entry->no_tries = 0; |
1734 | /* |
1735 | * Data direct VC not yet set up, check to see if the unknown |
1736 | * frame count is greater than the limit. If the limit has |
1737 | * not been reached, allow the caller to send packet to |
1738 | * BUS. |
1739 | */ |
1740 | if (entry->status != ESI_FLUSH_PENDING && |
1741 | entry->packets_flooded < |
1742 | priv->maximum_unknown_frame_count) { |
1743 | entry->packets_flooded++; |
1744 | pr_debug("Flooding..\n" ); |
1745 | found = priv->mcast_vcc; |
1746 | goto out; |
1747 | } |
1748 | /* |
1749 | * We got here because entry->status == ESI_FLUSH_PENDING |
1750 | * or BUS flood limit was reached for an entry which is |
1751 | * in ESI_ARP_PENDING or ESI_VC_PENDING state. |
1752 | */ |
1753 | lec_arp_hold(entry); |
1754 | *ret_entry = entry; |
1755 | pr_debug("entry->status %d entry->vcc %p\n" , entry->status, |
1756 | entry->vcc); |
1757 | found = NULL; |
1758 | } else { |
1759 | /* No matching entry was found */ |
1760 | entry = make_entry(priv, mac_addr: mac_to_find); |
1761 | pr_debug("Making entry\n" ); |
1762 | if (!entry) { |
1763 | found = priv->mcast_vcc; |
1764 | goto out; |
1765 | } |
1766 | lec_arp_add(priv, entry); |
1767 | /* We want arp-request(s) to be sent */ |
1768 | entry->packets_flooded = 1; |
1769 | entry->status = ESI_ARP_PENDING; |
1770 | entry->no_tries = 1; |
1771 | entry->last_used = entry->timestamp = jiffies; |
1772 | entry->is_rdesc = is_rdesc; |
1773 | if (entry->is_rdesc) |
1774 | send_to_lecd(priv, type: l_rdesc_arp_xmt, mac_addr: mac_to_find, NULL, |
1775 | NULL); |
1776 | else |
1777 | send_to_lecd(priv, type: l_arp_xmt, mac_addr: mac_to_find, NULL, NULL); |
1778 | entry->timer.expires = jiffies + (1 * HZ); |
1779 | entry->timer.function = lec_arp_expire_arp; |
1780 | add_timer(timer: &entry->timer); |
1781 | found = priv->mcast_vcc; |
1782 | } |
1783 | |
1784 | out: |
1785 | spin_unlock_irqrestore(lock: &priv->lec_arp_lock, flags); |
1786 | return found; |
1787 | } |
1788 | |
1789 | static int |
1790 | lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr, |
1791 | unsigned long permanent) |
1792 | { |
1793 | unsigned long flags; |
1794 | struct hlist_node *next; |
1795 | struct lec_arp_table *entry; |
1796 | int i; |
1797 | |
1798 | pr_debug("\n" ); |
1799 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
1800 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
1801 | hlist_for_each_entry_safe(entry, next, |
1802 | &priv->lec_arp_tables[i], next) { |
1803 | if (!memcmp(p: atm_addr, q: entry->atm_addr, ATM_ESA_LEN) && |
1804 | (permanent || |
1805 | !(entry->flags & LEC_PERMANENT_FLAG))) { |
1806 | lec_arp_remove(priv, to_remove: entry); |
1807 | lec_arp_put(entry); |
1808 | } |
1809 | spin_unlock_irqrestore(lock: &priv->lec_arp_lock, flags); |
1810 | return 0; |
1811 | } |
1812 | } |
1813 | spin_unlock_irqrestore(lock: &priv->lec_arp_lock, flags); |
1814 | return -1; |
1815 | } |
1816 | |
1817 | /* |
1818 | * Notifies: Response to arp_request (atm_addr != NULL) |
1819 | */ |
1820 | static void |
1821 | lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr, |
1822 | const unsigned char *atm_addr, unsigned long remoteflag, |
1823 | unsigned int targetless_le_arp) |
1824 | { |
1825 | unsigned long flags; |
1826 | struct hlist_node *next; |
1827 | struct lec_arp_table *entry, *tmp; |
1828 | int i; |
1829 | |
1830 | pr_debug("%smac:%pM\n" , |
1831 | (targetless_le_arp) ? "targetless " : "" , mac_addr); |
1832 | |
1833 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
1834 | entry = lec_arp_find(priv, mac_addr); |
1835 | if (entry == NULL && targetless_le_arp) |
1836 | goto out; /* |
1837 | * LANE2: ignore targetless LE_ARPs for which |
1838 | * we have no entry in the cache. 7.1.30 |
1839 | */ |
1840 | if (!hlist_empty(h: &priv->lec_arp_empty_ones)) { |
1841 | hlist_for_each_entry_safe(entry, next, |
1842 | &priv->lec_arp_empty_ones, next) { |
1843 | if (memcmp(p: entry->atm_addr, q: atm_addr, ATM_ESA_LEN) == 0) { |
1844 | hlist_del(n: &entry->next); |
1845 | del_timer(timer: &entry->timer); |
1846 | tmp = lec_arp_find(priv, mac_addr); |
1847 | if (tmp) { |
1848 | del_timer(timer: &tmp->timer); |
1849 | tmp->status = ESI_FORWARD_DIRECT; |
1850 | memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN); |
1851 | tmp->vcc = entry->vcc; |
1852 | tmp->old_push = entry->old_push; |
1853 | tmp->last_used = jiffies; |
1854 | del_timer(timer: &entry->timer); |
1855 | lec_arp_put(entry); |
1856 | entry = tmp; |
1857 | } else { |
1858 | entry->status = ESI_FORWARD_DIRECT; |
1859 | ether_addr_copy(dst: entry->mac_addr, |
1860 | src: mac_addr); |
1861 | entry->last_used = jiffies; |
1862 | lec_arp_add(priv, entry); |
1863 | } |
1864 | if (remoteflag) |
1865 | entry->flags |= LEC_REMOTE_FLAG; |
1866 | else |
1867 | entry->flags &= ~LEC_REMOTE_FLAG; |
1868 | pr_debug("After update\n" ); |
1869 | dump_arp_table(priv); |
1870 | goto out; |
1871 | } |
1872 | } |
1873 | } |
1874 | |
1875 | entry = lec_arp_find(priv, mac_addr); |
1876 | if (!entry) { |
1877 | entry = make_entry(priv, mac_addr); |
1878 | if (!entry) |
1879 | goto out; |
1880 | entry->status = ESI_UNKNOWN; |
1881 | lec_arp_add(priv, entry); |
1882 | /* Temporary, changes before end of function */ |
1883 | } |
1884 | memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN); |
1885 | del_timer(timer: &entry->timer); |
1886 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
1887 | hlist_for_each_entry(tmp, |
1888 | &priv->lec_arp_tables[i], next) { |
1889 | if (entry != tmp && |
1890 | !memcmp(p: tmp->atm_addr, q: atm_addr, ATM_ESA_LEN)) { |
1891 | /* Vcc to this host exists */ |
1892 | if (tmp->status > ESI_VC_PENDING) { |
1893 | /* |
1894 | * ESI_FLUSH_PENDING, |
1895 | * ESI_FORWARD_DIRECT |
1896 | */ |
1897 | entry->vcc = tmp->vcc; |
1898 | entry->old_push = tmp->old_push; |
1899 | } |
1900 | entry->status = tmp->status; |
1901 | break; |
1902 | } |
1903 | } |
1904 | } |
1905 | if (remoteflag) |
1906 | entry->flags |= LEC_REMOTE_FLAG; |
1907 | else |
1908 | entry->flags &= ~LEC_REMOTE_FLAG; |
1909 | if (entry->status == ESI_ARP_PENDING || entry->status == ESI_UNKNOWN) { |
1910 | entry->status = ESI_VC_PENDING; |
1911 | send_to_lecd(priv, type: l_svc_setup, mac_addr: entry->mac_addr, atm_addr, NULL); |
1912 | } |
1913 | pr_debug("After update2\n" ); |
1914 | dump_arp_table(priv); |
1915 | out: |
1916 | spin_unlock_irqrestore(lock: &priv->lec_arp_lock, flags); |
1917 | } |
1918 | |
1919 | /* |
1920 | * Notifies: Vcc setup ready |
1921 | */ |
1922 | static void |
1923 | lec_vcc_added(struct lec_priv *priv, const struct atmlec_ioc *ioc_data, |
1924 | struct atm_vcc *vcc, |
1925 | void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb)) |
1926 | { |
1927 | unsigned long flags; |
1928 | struct lec_arp_table *entry; |
1929 | int i, found_entry = 0; |
1930 | |
1931 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
1932 | /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */ |
1933 | if (ioc_data->receive == 2) { |
1934 | pr_debug("LEC_ARP: Attaching mcast forward\n" ); |
1935 | #if 0 |
1936 | entry = lec_arp_find(priv, bus_mac); |
1937 | if (!entry) { |
1938 | pr_info("LEC_ARP: Multicast entry not found!\n" ); |
1939 | goto out; |
1940 | } |
1941 | memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); |
1942 | entry->recv_vcc = vcc; |
1943 | entry->old_recv_push = old_push; |
1944 | #endif |
1945 | entry = make_entry(priv, mac_addr: bus_mac); |
1946 | if (entry == NULL) |
1947 | goto out; |
1948 | del_timer(timer: &entry->timer); |
1949 | memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); |
1950 | entry->recv_vcc = vcc; |
1951 | entry->old_recv_push = old_push; |
1952 | hlist_add_head(n: &entry->next, h: &priv->mcast_fwds); |
1953 | goto out; |
1954 | } else if (ioc_data->receive == 1) { |
1955 | /* |
1956 | * Vcc which we don't want to make default vcc, |
1957 | * attach it anyway. |
1958 | */ |
1959 | pr_debug("LEC_ARP:Attaching data direct, not default: %*phN\n" , |
1960 | ATM_ESA_LEN, ioc_data->atm_addr); |
1961 | entry = make_entry(priv, mac_addr: bus_mac); |
1962 | if (entry == NULL) |
1963 | goto out; |
1964 | memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); |
1965 | eth_zero_addr(addr: entry->mac_addr); |
1966 | entry->recv_vcc = vcc; |
1967 | entry->old_recv_push = old_push; |
1968 | entry->status = ESI_UNKNOWN; |
1969 | entry->timer.expires = jiffies + priv->vcc_timeout_period; |
1970 | entry->timer.function = lec_arp_expire_vcc; |
1971 | hlist_add_head(n: &entry->next, h: &priv->lec_no_forward); |
1972 | add_timer(timer: &entry->timer); |
1973 | dump_arp_table(priv); |
1974 | goto out; |
1975 | } |
1976 | pr_debug("LEC_ARP:Attaching data direct, default: %*phN\n" , |
1977 | ATM_ESA_LEN, ioc_data->atm_addr); |
1978 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
1979 | hlist_for_each_entry(entry, |
1980 | &priv->lec_arp_tables[i], next) { |
1981 | if (memcmp |
1982 | (p: ioc_data->atm_addr, q: entry->atm_addr, |
1983 | ATM_ESA_LEN) == 0) { |
1984 | pr_debug("LEC_ARP: Attaching data direct\n" ); |
1985 | pr_debug("Currently -> Vcc: %d, Rvcc:%d\n" , |
1986 | entry->vcc ? entry->vcc->vci : 0, |
1987 | entry->recv_vcc ? entry->recv_vcc-> |
1988 | vci : 0); |
1989 | found_entry = 1; |
1990 | del_timer(timer: &entry->timer); |
1991 | entry->vcc = vcc; |
1992 | entry->old_push = old_push; |
1993 | if (entry->status == ESI_VC_PENDING) { |
1994 | if (priv->maximum_unknown_frame_count |
1995 | == 0) |
1996 | entry->status = |
1997 | ESI_FORWARD_DIRECT; |
1998 | else { |
1999 | entry->timestamp = jiffies; |
2000 | entry->status = |
2001 | ESI_FLUSH_PENDING; |
2002 | #if 0 |
2003 | send_to_lecd(priv, l_flush_xmt, |
2004 | NULL, |
2005 | entry->atm_addr, |
2006 | NULL); |
2007 | #endif |
2008 | } |
2009 | } else { |
2010 | /* |
2011 | * They were forming a connection |
2012 | * to us, and we to them. Our |
2013 | * ATM address is numerically lower |
2014 | * than theirs, so we make connection |
2015 | * we formed into default VCC (8.1.11). |
2016 | * Connection they made gets torn |
2017 | * down. This might confuse some |
2018 | * clients. Can be changed if |
2019 | * someone reports trouble... |
2020 | */ |
2021 | ; |
2022 | } |
2023 | } |
2024 | } |
2025 | } |
2026 | if (found_entry) { |
2027 | pr_debug("After vcc was added\n" ); |
2028 | dump_arp_table(priv); |
2029 | goto out; |
2030 | } |
2031 | /* |
2032 | * Not found, snatch address from first data packet that arrives |
2033 | * from this vcc |
2034 | */ |
2035 | entry = make_entry(priv, mac_addr: bus_mac); |
2036 | if (!entry) |
2037 | goto out; |
2038 | entry->vcc = vcc; |
2039 | entry->old_push = old_push; |
2040 | memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); |
2041 | eth_zero_addr(addr: entry->mac_addr); |
2042 | entry->status = ESI_UNKNOWN; |
2043 | hlist_add_head(n: &entry->next, h: &priv->lec_arp_empty_ones); |
2044 | entry->timer.expires = jiffies + priv->vcc_timeout_period; |
2045 | entry->timer.function = lec_arp_expire_vcc; |
2046 | add_timer(timer: &entry->timer); |
2047 | pr_debug("After vcc was added\n" ); |
2048 | dump_arp_table(priv); |
2049 | out: |
2050 | spin_unlock_irqrestore(lock: &priv->lec_arp_lock, flags); |
2051 | } |
2052 | |
2053 | static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id) |
2054 | { |
2055 | unsigned long flags; |
2056 | struct lec_arp_table *entry; |
2057 | int i; |
2058 | |
2059 | pr_debug("%lx\n" , tran_id); |
2060 | restart: |
2061 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
2062 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
2063 | hlist_for_each_entry(entry, |
2064 | &priv->lec_arp_tables[i], next) { |
2065 | if (entry->flush_tran_id == tran_id && |
2066 | entry->status == ESI_FLUSH_PENDING) { |
2067 | struct sk_buff *skb; |
2068 | struct atm_vcc *vcc = entry->vcc; |
2069 | |
2070 | lec_arp_hold(entry); |
2071 | spin_unlock_irqrestore(lock: &priv->lec_arp_lock, |
2072 | flags); |
2073 | while ((skb = skb_dequeue(list: &entry->tx_wait))) |
2074 | lec_send(vcc, skb); |
2075 | entry->last_used = jiffies; |
2076 | entry->status = ESI_FORWARD_DIRECT; |
2077 | lec_arp_put(entry); |
2078 | pr_debug("LEC_ARP: Flushed\n" ); |
2079 | goto restart; |
2080 | } |
2081 | } |
2082 | } |
2083 | spin_unlock_irqrestore(lock: &priv->lec_arp_lock, flags); |
2084 | dump_arp_table(priv); |
2085 | } |
2086 | |
2087 | static void |
2088 | lec_set_flush_tran_id(struct lec_priv *priv, |
2089 | const unsigned char *atm_addr, unsigned long tran_id) |
2090 | { |
2091 | unsigned long flags; |
2092 | struct lec_arp_table *entry; |
2093 | int i; |
2094 | |
2095 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
2096 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) |
2097 | hlist_for_each_entry(entry, |
2098 | &priv->lec_arp_tables[i], next) { |
2099 | if (!memcmp(p: atm_addr, q: entry->atm_addr, ATM_ESA_LEN)) { |
2100 | entry->flush_tran_id = tran_id; |
2101 | pr_debug("Set flush transaction id to %lx for %p\n" , |
2102 | tran_id, entry); |
2103 | } |
2104 | } |
2105 | spin_unlock_irqrestore(lock: &priv->lec_arp_lock, flags); |
2106 | } |
2107 | |
2108 | static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc) |
2109 | { |
2110 | unsigned long flags; |
2111 | unsigned char mac_addr[] = { |
2112 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff |
2113 | }; |
2114 | struct lec_arp_table *to_add; |
2115 | struct lec_vcc_priv *vpriv; |
2116 | int err = 0; |
2117 | |
2118 | vpriv = kmalloc(size: sizeof(struct lec_vcc_priv), GFP_KERNEL); |
2119 | if (!vpriv) |
2120 | return -ENOMEM; |
2121 | vpriv->xoff = 0; |
2122 | vpriv->old_pop = vcc->pop; |
2123 | vcc->user_back = vpriv; |
2124 | vcc->pop = lec_pop; |
2125 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
2126 | to_add = make_entry(priv, mac_addr); |
2127 | if (!to_add) { |
2128 | vcc->pop = vpriv->old_pop; |
2129 | kfree(objp: vpriv); |
2130 | err = -ENOMEM; |
2131 | goto out; |
2132 | } |
2133 | memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN); |
2134 | to_add->status = ESI_FORWARD_DIRECT; |
2135 | to_add->flags |= LEC_PERMANENT_FLAG; |
2136 | to_add->vcc = vcc; |
2137 | to_add->old_push = vcc->push; |
2138 | vcc->push = lec_push; |
2139 | priv->mcast_vcc = vcc; |
2140 | lec_arp_add(priv, entry: to_add); |
2141 | out: |
2142 | spin_unlock_irqrestore(lock: &priv->lec_arp_lock, flags); |
2143 | return err; |
2144 | } |
2145 | |
2146 | static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc) |
2147 | { |
2148 | unsigned long flags; |
2149 | struct hlist_node *next; |
2150 | struct lec_arp_table *entry; |
2151 | int i; |
2152 | |
2153 | pr_debug("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n" , vcc->vpi, vcc->vci); |
2154 | dump_arp_table(priv); |
2155 | |
2156 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
2157 | |
2158 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
2159 | hlist_for_each_entry_safe(entry, next, |
2160 | &priv->lec_arp_tables[i], next) { |
2161 | if (vcc == entry->vcc) { |
2162 | lec_arp_remove(priv, to_remove: entry); |
2163 | lec_arp_put(entry); |
2164 | if (priv->mcast_vcc == vcc) |
2165 | priv->mcast_vcc = NULL; |
2166 | } |
2167 | } |
2168 | } |
2169 | |
2170 | hlist_for_each_entry_safe(entry, next, |
2171 | &priv->lec_arp_empty_ones, next) { |
2172 | if (entry->vcc == vcc) { |
2173 | lec_arp_clear_vccs(entry); |
2174 | del_timer(timer: &entry->timer); |
2175 | hlist_del(n: &entry->next); |
2176 | lec_arp_put(entry); |
2177 | } |
2178 | } |
2179 | |
2180 | hlist_for_each_entry_safe(entry, next, |
2181 | &priv->lec_no_forward, next) { |
2182 | if (entry->recv_vcc == vcc) { |
2183 | lec_arp_clear_vccs(entry); |
2184 | del_timer(timer: &entry->timer); |
2185 | hlist_del(n: &entry->next); |
2186 | lec_arp_put(entry); |
2187 | } |
2188 | } |
2189 | |
2190 | hlist_for_each_entry_safe(entry, next, &priv->mcast_fwds, next) { |
2191 | if (entry->recv_vcc == vcc) { |
2192 | lec_arp_clear_vccs(entry); |
2193 | /* No timer, LANEv2 7.1.20 and 2.3.5.3 */ |
2194 | hlist_del(n: &entry->next); |
2195 | lec_arp_put(entry); |
2196 | } |
2197 | } |
2198 | |
2199 | spin_unlock_irqrestore(lock: &priv->lec_arp_lock, flags); |
2200 | dump_arp_table(priv); |
2201 | } |
2202 | |
2203 | static void |
2204 | lec_arp_check_empties(struct lec_priv *priv, |
2205 | struct atm_vcc *vcc, struct sk_buff *skb) |
2206 | { |
2207 | unsigned long flags; |
2208 | struct hlist_node *next; |
2209 | struct lec_arp_table *entry, *tmp; |
2210 | struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data; |
2211 | unsigned char *src = hdr->h_source; |
2212 | |
2213 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
2214 | hlist_for_each_entry_safe(entry, next, |
2215 | &priv->lec_arp_empty_ones, next) { |
2216 | if (vcc == entry->vcc) { |
2217 | del_timer(timer: &entry->timer); |
2218 | ether_addr_copy(dst: entry->mac_addr, src); |
2219 | entry->status = ESI_FORWARD_DIRECT; |
2220 | entry->last_used = jiffies; |
2221 | /* We might have got an entry */ |
2222 | tmp = lec_arp_find(priv, mac_addr: src); |
2223 | if (tmp) { |
2224 | lec_arp_remove(priv, to_remove: tmp); |
2225 | lec_arp_put(entry: tmp); |
2226 | } |
2227 | hlist_del(n: &entry->next); |
2228 | lec_arp_add(priv, entry); |
2229 | goto out; |
2230 | } |
2231 | } |
2232 | pr_debug("LEC_ARP: Arp_check_empties: entry not found!\n" ); |
2233 | out: |
2234 | spin_unlock_irqrestore(lock: &priv->lec_arp_lock, flags); |
2235 | } |
2236 | |
2237 | MODULE_LICENSE("GPL" ); |
2238 | |