Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
f7d57453 | 2 | * lec.c: Lan Emulation driver |
1da177e4 | 3 | * |
d44f7746 | 4 | * Marko Kiiskila <mkiiskila@yahoo.com> |
1da177e4 LT |
5 | */ |
6 | ||
1da177e4 LT |
7 | #include <linux/kernel.h> |
8 | #include <linux/bitops.h> | |
4fc268d2 | 9 | #include <linux/capability.h> |
1da177e4 LT |
10 | |
11 | /* We are ethernet device */ | |
12 | #include <linux/if_ether.h> | |
13 | #include <linux/netdevice.h> | |
14 | #include <linux/etherdevice.h> | |
15 | #include <net/sock.h> | |
16 | #include <linux/skbuff.h> | |
17 | #include <linux/ip.h> | |
18 | #include <asm/byteorder.h> | |
19 | #include <asm/uaccess.h> | |
20 | #include <net/arp.h> | |
21 | #include <net/dst.h> | |
22 | #include <linux/proc_fs.h> | |
23 | #include <linux/spinlock.h> | |
1da177e4 LT |
24 | #include <linux/seq_file.h> |
25 | ||
26 | /* TokenRing if needed */ | |
27 | #ifdef CONFIG_TR | |
28 | #include <linux/trdevice.h> | |
29 | #endif | |
30 | ||
31 | /* And atm device */ | |
32 | #include <linux/atmdev.h> | |
33 | #include <linux/atmlec.h> | |
34 | ||
35 | /* Proxy LEC knows about bridging */ | |
36 | #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) | |
1da177e4 LT |
37 | #include "../bridge/br_private.h" |
38 | ||
d44f7746 | 39 | static unsigned char bridge_ula_lec[] = { 0x01, 0x80, 0xc2, 0x00, 0x00 }; |
1da177e4 LT |
40 | #endif |
41 | ||
42 | /* Modular too */ | |
43 | #include <linux/module.h> | |
44 | #include <linux/init.h> | |
45 | ||
46 | #include "lec.h" | |
47 | #include "lec_arpc.h" | |
48 | #include "resources.h" | |
49 | ||
d44f7746 CW |
50 | #define DUMP_PACKETS 0 /* |
51 | * 0 = None, | |
52 | * 1 = 30 first bytes | |
53 | * 2 = Whole packet | |
54 | */ | |
1da177e4 | 55 | |
d44f7746 CW |
56 | #define LEC_UNRES_QUE_LEN 8 /* |
57 | * number of tx packets to queue for a | |
58 | * single destination while waiting for SVC | |
59 | */ | |
1da177e4 LT |
60 | |
61 | static int lec_open(struct net_device *dev); | |
3c805a22 SH |
62 | static netdev_tx_t lec_start_xmit(struct sk_buff *skb, |
63 | struct net_device *dev); | |
1da177e4 | 64 | static int lec_close(struct net_device *dev); |
d44f7746 | 65 | static struct lec_arp_table *lec_arp_find(struct lec_priv *priv, |
61c33e01 | 66 | const unsigned char *mac_addr); |
1da177e4 | 67 | static int lec_arp_remove(struct lec_priv *priv, |
d44f7746 | 68 | struct lec_arp_table *to_remove); |
1da177e4 | 69 | /* LANE2 functions */ |
61c33e01 MBJ |
70 | static void lane2_associate_ind(struct net_device *dev, const u8 *mac_address, |
71 | const u8 *tlvs, u32 sizeoftlvs); | |
72 | static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force, | |
d44f7746 | 73 | u8 **tlvs, u32 *sizeoftlvs); |
61c33e01 MBJ |
74 | static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst, |
75 | const u8 *tlvs, u32 sizeoftlvs); | |
1da177e4 | 76 | |
61c33e01 | 77 | static int lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr, |
1da177e4 LT |
78 | unsigned long permanent); |
79 | static void lec_arp_check_empties(struct lec_priv *priv, | |
80 | struct atm_vcc *vcc, struct sk_buff *skb); | |
81 | static void lec_arp_destroy(struct lec_priv *priv); | |
82 | static void lec_arp_init(struct lec_priv *priv); | |
d44f7746 | 83 | static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv, |
61c33e01 | 84 | const unsigned char *mac_to_find, |
1da177e4 LT |
85 | int is_rdesc, |
86 | struct lec_arp_table **ret_entry); | |
61c33e01 MBJ |
87 | static void lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr, |
88 | const unsigned char *atm_addr, unsigned long remoteflag, | |
1da177e4 LT |
89 | unsigned int targetless_le_arp); |
90 | static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id); | |
91 | static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc); | |
92 | static void lec_set_flush_tran_id(struct lec_priv *priv, | |
61c33e01 | 93 | const unsigned char *atm_addr, |
1da177e4 | 94 | unsigned long tran_id); |
61c33e01 | 95 | static void lec_vcc_added(struct lec_priv *priv, const struct atmlec_ioc *ioc_data, |
1da177e4 | 96 | struct atm_vcc *vcc, |
d44f7746 CW |
97 | void (*old_push) (struct atm_vcc *vcc, |
98 | struct sk_buff *skb)); | |
1da177e4 LT |
99 | static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc); |
100 | ||
33a9c2d4 CW |
101 | /* must be done under lec_arp_lock */ |
102 | static inline void lec_arp_hold(struct lec_arp_table *entry) | |
103 | { | |
104 | atomic_inc(&entry->usage); | |
105 | } | |
106 | ||
107 | static inline void lec_arp_put(struct lec_arp_table *entry) | |
108 | { | |
109 | if (atomic_dec_and_test(&entry->usage)) | |
110 | kfree(entry); | |
111 | } | |
112 | ||
113 | ||
1da177e4 | 114 | static struct lane2_ops lane2_ops = { |
d44f7746 CW |
115 | lane2_resolve, /* resolve, spec 3.1.3 */ |
116 | lane2_associate_req, /* associate_req, spec 3.1.4 */ | |
117 | NULL /* associate indicator, spec 3.1.5 */ | |
1da177e4 LT |
118 | }; |
119 | ||
d44f7746 | 120 | static unsigned char bus_mac[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; |
1da177e4 LT |
121 | |
122 | /* Device structures */ | |
123 | static struct net_device *dev_lec[MAX_LEC_ITF]; | |
124 | ||
125 | #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) | |
126 | static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev) | |
127 | { | |
d44f7746 CW |
128 | struct ethhdr *eth; |
129 | char *buff; | |
130 | struct lec_priv *priv; | |
131 | ||
132 | /* | |
133 | * Check if this is a BPDU. If so, ask zeppelin to send | |
134 | * LE_TOPOLOGY_REQUEST with the same value of Topology Change bit | |
135 | * as the Config BPDU has | |
136 | */ | |
137 | eth = (struct ethhdr *)skb->data; | |
138 | buff = skb->data + skb->dev->hard_header_len; | |
139 | if (*buff++ == 0x42 && *buff++ == 0x42 && *buff++ == 0x03) { | |
1da177e4 | 140 | struct sock *sk; |
d44f7746 CW |
141 | struct sk_buff *skb2; |
142 | struct atmlec_msg *mesg; | |
143 | ||
144 | skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC); | |
145 | if (skb2 == NULL) | |
146 | return; | |
147 | skb2->len = sizeof(struct atmlec_msg); | |
148 | mesg = (struct atmlec_msg *)skb2->data; | |
149 | mesg->type = l_topology_change; | |
150 | buff += 4; | |
151 | mesg->content.normal.flag = *buff & 0x01; /* 0x01 is topology change */ | |
152 | ||
524ad0a7 | 153 | priv = netdev_priv(dev); |
d44f7746 | 154 | atm_force_charge(priv->lecd, skb2->truesize); |
1da177e4 | 155 | sk = sk_atm(priv->lecd); |
d44f7746 CW |
156 | skb_queue_tail(&sk->sk_receive_queue, skb2); |
157 | sk->sk_data_ready(sk, skb2->len); | |
158 | } | |
1da177e4 | 159 | |
d44f7746 | 160 | return; |
1da177e4 LT |
161 | } |
162 | #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */ | |
163 | ||
164 | /* | |
165 | * Modelled after tr_type_trans | |
166 | * All multicast and ARE or STE frames go to BUS. | |
167 | * Non source routed frames go by destination address. | |
168 | * Last hop source routed frames go by destination address. | |
169 | * Not last hop source routed frames go by _next_ route descriptor. | |
170 | * Returns pointer to destination MAC address or fills in rdesc | |
171 | * and returns NULL. | |
172 | */ | |
173 | #ifdef CONFIG_TR | |
174 | static unsigned char *get_tr_dst(unsigned char *packet, unsigned char *rdesc) | |
175 | { | |
d44f7746 | 176 | struct trh_hdr *trh; |
5c17d5f1 | 177 | unsigned int riflen, num_rdsc; |
d44f7746 CW |
178 | |
179 | trh = (struct trh_hdr *)packet; | |
180 | if (trh->daddr[0] & (uint8_t) 0x80) | |
181 | return bus_mac; /* multicast */ | |
182 | ||
183 | if (trh->saddr[0] & TR_RII) { | |
184 | riflen = (ntohs(trh->rcf) & TR_RCF_LEN_MASK) >> 8; | |
185 | if ((ntohs(trh->rcf) >> 13) != 0) | |
186 | return bus_mac; /* ARE or STE */ | |
187 | } else | |
188 | return trh->daddr; /* not source routed */ | |
189 | ||
190 | if (riflen < 6) | |
191 | return trh->daddr; /* last hop, source routed */ | |
192 | ||
193 | /* riflen is 6 or more, packet has more than one route descriptor */ | |
194 | num_rdsc = (riflen / 2) - 1; | |
195 | memset(rdesc, 0, ETH_ALEN); | |
196 | /* offset 4 comes from LAN destination field in LE control frames */ | |
197 | if (trh->rcf & htons((uint16_t) TR_RCF_DIR_BIT)) | |
30d492da | 198 | memcpy(&rdesc[4], &trh->rseg[num_rdsc - 2], sizeof(__be16)); |
d44f7746 | 199 | else { |
30d492da | 200 | memcpy(&rdesc[4], &trh->rseg[1], sizeof(__be16)); |
d44f7746 CW |
201 | rdesc[5] = ((ntohs(trh->rseg[0]) & 0x000f) | (rdesc[5] & 0xf0)); |
202 | } | |
203 | ||
204 | return NULL; | |
1da177e4 LT |
205 | } |
206 | #endif /* CONFIG_TR */ | |
207 | ||
208 | /* | |
209 | * Open/initialize the netdevice. This is called (in the current kernel) | |
210 | * sometime after booting when the 'ifconfig' program is run. | |
211 | * | |
212 | * This routine should set everything up anew at each open, even | |
213 | * registers that "should" only need to be set once at boot, so that | |
214 | * there is non-reboot way to recover if something goes wrong. | |
215 | */ | |
216 | ||
d44f7746 | 217 | static int lec_open(struct net_device *dev) |
1da177e4 | 218 | { |
1da177e4 | 219 | netif_start_queue(dev); |
162619e5 | 220 | memset(&dev->stats, 0, sizeof(struct net_device_stats)); |
d44f7746 CW |
221 | |
222 | return 0; | |
1da177e4 LT |
223 | } |
224 | ||
162619e5 SH |
225 | static void |
226 | lec_send(struct atm_vcc *vcc, struct sk_buff *skb) | |
1da177e4 | 227 | { |
162619e5 SH |
228 | struct net_device *dev = skb->dev; |
229 | ||
1da177e4 LT |
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) { | |
162619e5 | 235 | dev->stats.tx_dropped++; |
1da177e4 LT |
236 | return; |
237 | } | |
238 | ||
162619e5 SH |
239 | dev->stats.tx_packets++; |
240 | dev->stats.tx_bytes += skb->len; | |
1da177e4 LT |
241 | } |
242 | ||
d44f7746 | 243 | static void lec_tx_timeout(struct net_device *dev) |
1da177e4 LT |
244 | { |
245 | printk(KERN_INFO "%s: tx timeout\n", dev->name); | |
246 | dev->trans_start = jiffies; | |
247 | netif_wake_queue(dev); | |
248 | } | |
249 | ||
3c805a22 SH |
250 | static netdev_tx_t lec_start_xmit(struct sk_buff *skb, |
251 | struct net_device *dev) | |
1da177e4 | 252 | { |
d44f7746 | 253 | struct sk_buff *skb2; |
524ad0a7 | 254 | struct lec_priv *priv = netdev_priv(dev); |
d44f7746 CW |
255 | struct lecdatahdr_8023 *lec_h; |
256 | struct atm_vcc *vcc; | |
1da177e4 | 257 | struct lec_arp_table *entry; |
d44f7746 | 258 | unsigned char *dst; |
1da177e4 LT |
259 | int min_frame_size; |
260 | #ifdef CONFIG_TR | |
d44f7746 | 261 | unsigned char rdesc[ETH_ALEN]; /* Token Ring route descriptor */ |
1da177e4 | 262 | #endif |
d44f7746 | 263 | int is_rdesc; |
1da177e4 | 264 | #if DUMP_PACKETS > 0 |
d44f7746 CW |
265 | char buf[300]; |
266 | int i = 0; | |
1da177e4 | 267 | #endif /* DUMP_PACKETS >0 */ |
d44f7746 | 268 | |
52240062 | 269 | pr_debug("lec_start_xmit called\n"); |
d44f7746 CW |
270 | if (!priv->lecd) { |
271 | printk("%s:No lecd attached\n", dev->name); | |
162619e5 | 272 | dev->stats.tx_errors++; |
d44f7746 | 273 | netif_stop_queue(dev); |
81fbbf60 PM |
274 | kfree_skb(skb); |
275 | return NETDEV_TX_OK; | |
d44f7746 CW |
276 | } |
277 | ||
52240062 | 278 | pr_debug("skbuff head:%lx data:%lx tail:%lx end:%lx\n", |
27a884dc | 279 | (long)skb->head, (long)skb->data, (long)skb_tail_pointer(skb), |
4305b541 | 280 | (long)skb_end_pointer(skb)); |
1da177e4 | 281 | #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) |
d44f7746 CW |
282 | if (memcmp(skb->data, bridge_ula_lec, sizeof(bridge_ula_lec)) == 0) |
283 | lec_handle_bridge(skb, dev); | |
1da177e4 LT |
284 | #endif |
285 | ||
d44f7746 CW |
286 | /* Make sure we have room for lec_id */ |
287 | if (skb_headroom(skb) < 2) { | |
1da177e4 | 288 | |
52240062 | 289 | pr_debug("lec_start_xmit: reallocating skb\n"); |
d44f7746 CW |
290 | skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN); |
291 | kfree_skb(skb); | |
292 | if (skb2 == NULL) | |
6ed10654 | 293 | return NETDEV_TX_OK; |
d44f7746 CW |
294 | skb = skb2; |
295 | } | |
296 | skb_push(skb, 2); | |
1da177e4 | 297 | |
d44f7746 CW |
298 | /* Put le header to place, works for TokenRing too */ |
299 | lec_h = (struct lecdatahdr_8023 *)skb->data; | |
300 | lec_h->le_header = htons(priv->lecid); | |
1da177e4 LT |
301 | |
302 | #ifdef CONFIG_TR | |
d44f7746 CW |
303 | /* |
304 | * Ugly. Use this to realign Token Ring packets for | |
305 | * e.g. PCA-200E driver. | |
306 | */ | |
307 | if (priv->is_trdev) { | |
308 | skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN); | |
309 | kfree_skb(skb); | |
310 | if (skb2 == NULL) | |
6ed10654 | 311 | return NETDEV_TX_OK; |
d44f7746 CW |
312 | skb = skb2; |
313 | } | |
1da177e4 LT |
314 | #endif |
315 | ||
316 | #if DUMP_PACKETS > 0 | |
d44f7746 CW |
317 | printk("%s: send datalen:%ld lecid:%4.4x\n", dev->name, |
318 | skb->len, priv->lecid); | |
1da177e4 | 319 | #if DUMP_PACKETS >= 2 |
d44f7746 CW |
320 | for (i = 0; i < skb->len && i < 99; i++) { |
321 | sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]); | |
322 | } | |
1da177e4 | 323 | #elif DUMP_PACKETS >= 1 |
d44f7746 CW |
324 | for (i = 0; i < skb->len && i < 30; i++) { |
325 | sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]); | |
326 | } | |
1da177e4 | 327 | #endif /* DUMP_PACKETS >= 1 */ |
d44f7746 CW |
328 | if (i == skb->len) |
329 | printk("%s\n", buf); | |
330 | else | |
331 | printk("%s...\n", buf); | |
1da177e4 LT |
332 | #endif /* DUMP_PACKETS > 0 */ |
333 | ||
d44f7746 | 334 | /* Minimum ethernet-frame size */ |
1da177e4 | 335 | #ifdef CONFIG_TR |
d44f7746 CW |
336 | if (priv->is_trdev) |
337 | min_frame_size = LEC_MINIMUM_8025_SIZE; | |
1da177e4 LT |
338 | else |
339 | #endif | |
d44f7746 CW |
340 | min_frame_size = LEC_MINIMUM_8023_SIZE; |
341 | if (skb->len < min_frame_size) { | |
342 | if ((skb->len + skb_tailroom(skb)) < min_frame_size) { | |
343 | skb2 = skb_copy_expand(skb, 0, | |
344 | min_frame_size - skb->truesize, | |
345 | GFP_ATOMIC); | |
346 | dev_kfree_skb(skb); | |
347 | if (skb2 == NULL) { | |
162619e5 | 348 | dev->stats.tx_dropped++; |
6ed10654 | 349 | return NETDEV_TX_OK; |
d44f7746 CW |
350 | } |
351 | skb = skb2; | |
352 | } | |
1da177e4 | 353 | skb_put(skb, min_frame_size - skb->len); |
d44f7746 CW |
354 | } |
355 | ||
356 | /* Send to right vcc */ | |
357 | is_rdesc = 0; | |
358 | dst = lec_h->h_dest; | |
1da177e4 | 359 | #ifdef CONFIG_TR |
d44f7746 CW |
360 | if (priv->is_trdev) { |
361 | dst = get_tr_dst(skb->data + 2, rdesc); | |
362 | if (dst == NULL) { | |
363 | dst = rdesc; | |
364 | is_rdesc = 1; | |
365 | } | |
366 | } | |
1da177e4 | 367 | #endif |
d44f7746 CW |
368 | entry = NULL; |
369 | vcc = lec_arp_resolve(priv, dst, is_rdesc, &entry); | |
58c14a8f | 370 | pr_debug("%s:vcc:%p vcc_flags:%lx, entry:%p\n", dev->name, |
d44f7746 CW |
371 | vcc, vcc ? vcc->flags : 0, entry); |
372 | if (!vcc || !test_bit(ATM_VF_READY, &vcc->flags)) { | |
373 | if (entry && (entry->tx_wait.qlen < LEC_UNRES_QUE_LEN)) { | |
52240062 | 374 | pr_debug("%s:lec_start_xmit: queuing packet, ", |
d44f7746 | 375 | dev->name); |
e174961c | 376 | pr_debug("MAC address %pM\n", lec_h->h_dest); |
d44f7746 CW |
377 | skb_queue_tail(&entry->tx_wait, skb); |
378 | } else { | |
52240062 | 379 | pr_debug |
d44f7746 CW |
380 | ("%s:lec_start_xmit: tx queue full or no arp entry, dropping, ", |
381 | dev->name); | |
e174961c | 382 | pr_debug("MAC address %pM\n", lec_h->h_dest); |
162619e5 | 383 | dev->stats.tx_dropped++; |
d44f7746 CW |
384 | dev_kfree_skb(skb); |
385 | } | |
6656e3c4 | 386 | goto out; |
d44f7746 CW |
387 | } |
388 | #if DUMP_PACKETS > 0 | |
389 | printk("%s:sending to vpi:%d vci:%d\n", dev->name, vcc->vpi, vcc->vci); | |
1da177e4 | 390 | #endif /* DUMP_PACKETS > 0 */ |
d44f7746 CW |
391 | |
392 | while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) { | |
52240062 | 393 | pr_debug("lec.c: emptying tx queue, "); |
e174961c | 394 | pr_debug("MAC address %pM\n", lec_h->h_dest); |
162619e5 | 395 | lec_send(vcc, skb2); |
d44f7746 | 396 | } |
1da177e4 | 397 | |
162619e5 | 398 | lec_send(vcc, skb); |
1da177e4 LT |
399 | |
400 | if (!atm_may_send(vcc, 0)) { | |
401 | struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); | |
402 | ||
403 | vpriv->xoff = 1; | |
404 | netif_stop_queue(dev); | |
405 | ||
406 | /* | |
407 | * vcc->pop() might have occurred in between, making | |
408 | * the vcc usuable again. Since xmit is serialized, | |
409 | * this is the only situation we have to re-test. | |
410 | */ | |
411 | ||
412 | if (atm_may_send(vcc, 0)) | |
413 | netif_wake_queue(dev); | |
414 | } | |
415 | ||
6656e3c4 CW |
416 | out: |
417 | if (entry) | |
418 | lec_arp_put(entry); | |
1da177e4 | 419 | dev->trans_start = jiffies; |
6ed10654 | 420 | return NETDEV_TX_OK; |
1da177e4 LT |
421 | } |
422 | ||
423 | /* The inverse routine to net_open(). */ | |
d44f7746 | 424 | static int lec_close(struct net_device *dev) |
1da177e4 | 425 | { |
d44f7746 CW |
426 | netif_stop_queue(dev); |
427 | return 0; | |
1da177e4 LT |
428 | } |
429 | ||
d44f7746 | 430 | static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb) |
1da177e4 LT |
431 | { |
432 | unsigned long flags; | |
d44f7746 | 433 | struct net_device *dev = (struct net_device *)vcc->proto_data; |
524ad0a7 | 434 | struct lec_priv *priv = netdev_priv(dev); |
d44f7746 CW |
435 | struct atmlec_msg *mesg; |
436 | struct lec_arp_table *entry; | |
437 | int i; | |
438 | char *tmp; /* FIXME */ | |
1da177e4 LT |
439 | |
440 | atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); | |
d44f7746 CW |
441 | mesg = (struct atmlec_msg *)skb->data; |
442 | tmp = skb->data; | |
443 | tmp += sizeof(struct atmlec_msg); | |
52240062 | 444 | pr_debug("%s: msg from zeppelin:%d\n", dev->name, mesg->type); |
d44f7746 CW |
445 | switch (mesg->type) { |
446 | case l_set_mac_addr: | |
447 | for (i = 0; i < 6; i++) { | |
448 | dev->dev_addr[i] = mesg->content.normal.mac_addr[i]; | |
449 | } | |
450 | break; | |
451 | case l_del_mac_addr: | |
452 | for (i = 0; i < 6; i++) { | |
453 | dev->dev_addr[i] = 0; | |
454 | } | |
455 | break; | |
456 | case l_addr_delete: | |
457 | lec_addr_delete(priv, mesg->content.normal.atm_addr, | |
458 | mesg->content.normal.flag); | |
459 | break; | |
460 | case l_topology_change: | |
461 | priv->topology_change = mesg->content.normal.flag; | |
462 | break; | |
463 | case l_flush_complete: | |
464 | lec_flush_complete(priv, mesg->content.normal.flag); | |
465 | break; | |
466 | case l_narp_req: /* LANE2: see 7.1.35 in the lane2 spec */ | |
1da177e4 | 467 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
d44f7746 CW |
468 | entry = lec_arp_find(priv, mesg->content.normal.mac_addr); |
469 | lec_arp_remove(priv, entry); | |
1da177e4 LT |
470 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
471 | ||
d44f7746 CW |
472 | if (mesg->content.normal.no_source_le_narp) |
473 | break; | |
474 | /* FALL THROUGH */ | |
475 | case l_arp_update: | |
476 | lec_arp_update(priv, mesg->content.normal.mac_addr, | |
477 | mesg->content.normal.atm_addr, | |
478 | mesg->content.normal.flag, | |
479 | mesg->content.normal.targetless_le_arp); | |
52240062 | 480 | pr_debug("lec: in l_arp_update\n"); |
d44f7746 | 481 | if (mesg->sizeoftlvs != 0) { /* LANE2 3.1.5 */ |
52240062 | 482 | pr_debug("lec: LANE2 3.1.5, got tlvs, size %d\n", |
d44f7746 CW |
483 | mesg->sizeoftlvs); |
484 | lane2_associate_ind(dev, mesg->content.normal.mac_addr, | |
485 | tmp, mesg->sizeoftlvs); | |
486 | } | |
487 | break; | |
488 | case l_config: | |
489 | priv->maximum_unknown_frame_count = | |
490 | mesg->content.config.maximum_unknown_frame_count; | |
491 | priv->max_unknown_frame_time = | |
492 | (mesg->content.config.max_unknown_frame_time * HZ); | |
493 | priv->max_retry_count = mesg->content.config.max_retry_count; | |
494 | priv->aging_time = (mesg->content.config.aging_time * HZ); | |
495 | priv->forward_delay_time = | |
496 | (mesg->content.config.forward_delay_time * HZ); | |
497 | priv->arp_response_time = | |
498 | (mesg->content.config.arp_response_time * HZ); | |
499 | priv->flush_timeout = (mesg->content.config.flush_timeout * HZ); | |
500 | priv->path_switching_delay = | |
501 | (mesg->content.config.path_switching_delay * HZ); | |
502 | priv->lane_version = mesg->content.config.lane_version; /* LANE2 */ | |
1da177e4 LT |
503 | priv->lane2_ops = NULL; |
504 | if (priv->lane_version > 1) | |
505 | priv->lane2_ops = &lane2_ops; | |
1f1900f9 | 506 | if (dev_set_mtu(dev, mesg->content.config.mtu)) |
1da177e4 | 507 | printk("%s: change_mtu to %d failed\n", dev->name, |
d44f7746 | 508 | mesg->content.config.mtu); |
1da177e4 | 509 | priv->is_proxy = mesg->content.config.is_proxy; |
d44f7746 CW |
510 | break; |
511 | case l_flush_tran_id: | |
512 | lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr, | |
513 | mesg->content.normal.flag); | |
514 | break; | |
515 | case l_set_lecid: | |
516 | priv->lecid = | |
517 | (unsigned short)(0xffff & mesg->content.normal.flag); | |
518 | break; | |
519 | case l_should_bridge: | |
1da177e4 | 520 | #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) |
d44f7746 | 521 | { |
e174961c JB |
522 | pr_debug("%s: bridge zeppelin asks about %pM\n", |
523 | dev->name, mesg->content.proxy.mac_addr); | |
d44f7746 | 524 | |
da678292 | 525 | if (br_fdb_test_addr_hook == NULL) |
d44f7746 CW |
526 | break; |
527 | ||
da678292 MM |
528 | if (br_fdb_test_addr_hook(dev, |
529 | mesg->content.proxy.mac_addr)) { | |
d44f7746 CW |
530 | /* hit from bridge table, send LE_ARP_RESPONSE */ |
531 | struct sk_buff *skb2; | |
532 | struct sock *sk; | |
533 | ||
52240062 | 534 | pr_debug |
d44f7746 CW |
535 | ("%s: entry found, responding to zeppelin\n", |
536 | dev->name); | |
537 | skb2 = | |
538 | alloc_skb(sizeof(struct atmlec_msg), | |
539 | GFP_ATOMIC); | |
da678292 | 540 | if (skb2 == NULL) |
d44f7746 | 541 | break; |
d44f7746 | 542 | skb2->len = sizeof(struct atmlec_msg); |
27d7ff46 ACM |
543 | skb_copy_to_linear_data(skb2, mesg, |
544 | sizeof(*mesg)); | |
d44f7746 CW |
545 | atm_force_charge(priv->lecd, skb2->truesize); |
546 | sk = sk_atm(priv->lecd); | |
547 | skb_queue_tail(&sk->sk_receive_queue, skb2); | |
548 | sk->sk_data_ready(sk, skb2->len); | |
549 | } | |
d44f7746 | 550 | } |
1da177e4 | 551 | #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */ |
d44f7746 CW |
552 | break; |
553 | default: | |
554 | printk("%s: Unknown message type %d\n", dev->name, mesg->type); | |
555 | dev_kfree_skb(skb); | |
556 | return -EINVAL; | |
557 | } | |
558 | dev_kfree_skb(skb); | |
559 | return 0; | |
1da177e4 LT |
560 | } |
561 | ||
d44f7746 | 562 | static void lec_atm_close(struct atm_vcc *vcc) |
1da177e4 | 563 | { |
d44f7746 CW |
564 | struct sk_buff *skb; |
565 | struct net_device *dev = (struct net_device *)vcc->proto_data; | |
524ad0a7 | 566 | struct lec_priv *priv = netdev_priv(dev); |
1da177e4 | 567 | |
d44f7746 CW |
568 | priv->lecd = NULL; |
569 | /* Do something needful? */ | |
1da177e4 | 570 | |
d44f7746 CW |
571 | netif_stop_queue(dev); |
572 | lec_arp_destroy(priv); | |
1da177e4 | 573 | |
d44f7746 | 574 | if (skb_peek(&sk_atm(vcc)->sk_receive_queue)) |
1da177e4 | 575 | printk("%s lec_atm_close: closing with messages pending\n", |
d44f7746 CW |
576 | dev->name); |
577 | while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue)) != NULL) { | |
578 | atm_return(vcc, skb->truesize); | |
1da177e4 | 579 | dev_kfree_skb(skb); |
d44f7746 CW |
580 | } |
581 | ||
1da177e4 | 582 | printk("%s: Shut down!\n", dev->name); |
d44f7746 | 583 | module_put(THIS_MODULE); |
1da177e4 LT |
584 | } |
585 | ||
586 | static struct atmdev_ops lecdev_ops = { | |
d44f7746 CW |
587 | .close = lec_atm_close, |
588 | .send = lec_atm_send | |
1da177e4 LT |
589 | }; |
590 | ||
591 | static struct atm_dev lecatm_dev = { | |
d44f7746 CW |
592 | .ops = &lecdev_ops, |
593 | .type = "lec", | |
594 | .number = 999, /* dummy device number */ | |
4ef8d0ae | 595 | .lock = __SPIN_LOCK_UNLOCKED(lecatm_dev.lock) |
1da177e4 LT |
596 | }; |
597 | ||
598 | /* | |
599 | * LANE2: new argument struct sk_buff *data contains | |
600 | * the LE_ARP based TLVs introduced in the LANE2 spec | |
601 | */ | |
d44f7746 CW |
602 | static int |
603 | send_to_lecd(struct lec_priv *priv, atmlec_msg_type type, | |
61c33e01 | 604 | const unsigned char *mac_addr, const unsigned char *atm_addr, |
d44f7746 | 605 | struct sk_buff *data) |
1da177e4 LT |
606 | { |
607 | struct sock *sk; | |
608 | struct sk_buff *skb; | |
609 | struct atmlec_msg *mesg; | |
610 | ||
611 | if (!priv || !priv->lecd) { | |
612 | return -1; | |
613 | } | |
614 | skb = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC); | |
615 | if (!skb) | |
616 | return -1; | |
617 | skb->len = sizeof(struct atmlec_msg); | |
618 | mesg = (struct atmlec_msg *)skb->data; | |
d44f7746 | 619 | memset(mesg, 0, sizeof(struct atmlec_msg)); |
1da177e4 | 620 | mesg->type = type; |
d44f7746 CW |
621 | if (data != NULL) |
622 | mesg->sizeoftlvs = data->len; | |
1da177e4 LT |
623 | if (mac_addr) |
624 | memcpy(&mesg->content.normal.mac_addr, mac_addr, ETH_ALEN); | |
d44f7746 CW |
625 | else |
626 | mesg->content.normal.targetless_le_arp = 1; | |
1da177e4 LT |
627 | if (atm_addr) |
628 | memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN); | |
629 | ||
d44f7746 | 630 | atm_force_charge(priv->lecd, skb->truesize); |
1da177e4 LT |
631 | sk = sk_atm(priv->lecd); |
632 | skb_queue_tail(&sk->sk_receive_queue, skb); | |
d44f7746 | 633 | sk->sk_data_ready(sk, skb->len); |
1da177e4 | 634 | |
d44f7746 | 635 | if (data != NULL) { |
52240062 | 636 | pr_debug("lec: about to send %d bytes of data\n", data->len); |
d44f7746 CW |
637 | atm_force_charge(priv->lecd, data->truesize); |
638 | skb_queue_tail(&sk->sk_receive_queue, data); | |
639 | sk->sk_data_ready(sk, skb->len); | |
640 | } | |
1da177e4 | 641 | |
d44f7746 | 642 | return 0; |
1da177e4 LT |
643 | } |
644 | ||
645 | /* shamelessly stolen from drivers/net/net_init.c */ | |
646 | static int lec_change_mtu(struct net_device *dev, int new_mtu) | |
647 | { | |
d44f7746 CW |
648 | if ((new_mtu < 68) || (new_mtu > 18190)) |
649 | return -EINVAL; | |
650 | dev->mtu = new_mtu; | |
651 | return 0; | |
1da177e4 LT |
652 | } |
653 | ||
654 | static void lec_set_multicast_list(struct net_device *dev) | |
655 | { | |
d44f7746 CW |
656 | /* |
657 | * by default, all multicast frames arrive over the bus. | |
658 | * eventually support selective multicast service | |
659 | */ | |
660 | return; | |
1da177e4 LT |
661 | } |
662 | ||
004b3225 SH |
663 | static const struct net_device_ops lec_netdev_ops = { |
664 | .ndo_open = lec_open, | |
665 | .ndo_stop = lec_close, | |
666 | .ndo_start_xmit = lec_start_xmit, | |
667 | .ndo_change_mtu = lec_change_mtu, | |
668 | .ndo_tx_timeout = lec_tx_timeout, | |
669 | .ndo_set_multicast_list = lec_set_multicast_list, | |
670 | }; | |
671 | ||
61c33e01 | 672 | static const unsigned char lec_ctrl_magic[] = { |
d44f7746 CW |
673 | 0xff, |
674 | 0x00, | |
675 | 0x01, | |
676 | 0x01 | |
677 | }; | |
1da177e4 | 678 | |
4a7097fc ST |
679 | #define LEC_DATA_DIRECT_8023 2 |
680 | #define LEC_DATA_DIRECT_8025 3 | |
681 | ||
682 | static int lec_is_data_direct(struct atm_vcc *vcc) | |
d44f7746 | 683 | { |
4a7097fc ST |
684 | return ((vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8023) || |
685 | (vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8025)); | |
d44f7746 | 686 | } |
4a7097fc | 687 | |
d44f7746 | 688 | static void lec_push(struct atm_vcc *vcc, struct sk_buff *skb) |
1da177e4 | 689 | { |
4a7097fc | 690 | unsigned long flags; |
d44f7746 | 691 | struct net_device *dev = (struct net_device *)vcc->proto_data; |
524ad0a7 | 692 | struct lec_priv *priv = netdev_priv(dev); |
1da177e4 LT |
693 | |
694 | #if DUMP_PACKETS >0 | |
d44f7746 CW |
695 | int i = 0; |
696 | char buf[300]; | |
1da177e4 | 697 | |
d44f7746 CW |
698 | printk("%s: lec_push vcc vpi:%d vci:%d\n", dev->name, |
699 | vcc->vpi, vcc->vci); | |
1da177e4 | 700 | #endif |
d44f7746 | 701 | if (!skb) { |
52240062 | 702 | pr_debug("%s: null skb\n", dev->name); |
d44f7746 CW |
703 | lec_vcc_close(priv, vcc); |
704 | return; | |
705 | } | |
1da177e4 | 706 | #if DUMP_PACKETS > 0 |
d44f7746 CW |
707 | printk("%s: rcv datalen:%ld lecid:%4.4x\n", dev->name, |
708 | skb->len, priv->lecid); | |
1da177e4 | 709 | #if DUMP_PACKETS >= 2 |
d44f7746 CW |
710 | for (i = 0; i < skb->len && i < 99; i++) { |
711 | sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]); | |
712 | } | |
1da177e4 | 713 | #elif DUMP_PACKETS >= 1 |
d44f7746 CW |
714 | for (i = 0; i < skb->len && i < 30; i++) { |
715 | sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]); | |
716 | } | |
1da177e4 | 717 | #endif /* DUMP_PACKETS >= 1 */ |
d44f7746 CW |
718 | if (i == skb->len) |
719 | printk("%s\n", buf); | |
720 | else | |
721 | printk("%s...\n", buf); | |
1da177e4 | 722 | #endif /* DUMP_PACKETS > 0 */ |
d44f7746 | 723 | if (memcmp(skb->data, lec_ctrl_magic, 4) == 0) { /* Control frame, to daemon */ |
1da177e4 LT |
724 | struct sock *sk = sk_atm(vcc); |
725 | ||
52240062 | 726 | pr_debug("%s: To daemon\n", dev->name); |
d44f7746 CW |
727 | skb_queue_tail(&sk->sk_receive_queue, skb); |
728 | sk->sk_data_ready(sk, skb->len); | |
729 | } else { /* Data frame, queue to protocol handlers */ | |
4a7097fc | 730 | struct lec_arp_table *entry; |
d44f7746 CW |
731 | unsigned char *src, *dst; |
732 | ||
733 | atm_return(vcc, skb->truesize); | |
30d492da | 734 | if (*(__be16 *) skb->data == htons(priv->lecid) || |
d44f7746 CW |
735 | !priv->lecd || !(dev->flags & IFF_UP)) { |
736 | /* | |
737 | * Probably looping back, or if lecd is missing, | |
738 | * lecd has gone down | |
739 | */ | |
52240062 | 740 | pr_debug("Ignoring frame...\n"); |
d44f7746 CW |
741 | dev_kfree_skb(skb); |
742 | return; | |
743 | } | |
1da177e4 | 744 | #ifdef CONFIG_TR |
d44f7746 CW |
745 | if (priv->is_trdev) |
746 | dst = ((struct lecdatahdr_8025 *)skb->data)->h_dest; | |
747 | else | |
1da177e4 | 748 | #endif |
d44f7746 | 749 | dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest; |
4a7097fc | 750 | |
d44f7746 CW |
751 | /* |
752 | * If this is a Data Direct VCC, and the VCC does not match | |
4a7097fc ST |
753 | * the LE_ARP cache entry, delete the LE_ARP cache entry. |
754 | */ | |
755 | spin_lock_irqsave(&priv->lec_arp_lock, flags); | |
756 | if (lec_is_data_direct(vcc)) { | |
757 | #ifdef CONFIG_TR | |
758 | if (priv->is_trdev) | |
d44f7746 CW |
759 | src = |
760 | ((struct lecdatahdr_8025 *)skb->data)-> | |
761 | h_source; | |
4a7097fc ST |
762 | else |
763 | #endif | |
d44f7746 CW |
764 | src = |
765 | ((struct lecdatahdr_8023 *)skb->data)-> | |
766 | h_source; | |
4a7097fc ST |
767 | entry = lec_arp_find(priv, src); |
768 | if (entry && entry->vcc != vcc) { | |
769 | lec_arp_remove(priv, entry); | |
33a9c2d4 | 770 | lec_arp_put(entry); |
4a7097fc ST |
771 | } |
772 | } | |
773 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); | |
1da177e4 | 774 | |
d44f7746 CW |
775 | if (!(dst[0] & 0x01) && /* Never filter Multi/Broadcast */ |
776 | !priv->is_proxy && /* Proxy wants all the packets */ | |
1da177e4 | 777 | memcmp(dst, dev->dev_addr, dev->addr_len)) { |
d44f7746 CW |
778 | dev_kfree_skb(skb); |
779 | return; | |
780 | } | |
d0732f64 | 781 | if (!hlist_empty(&priv->lec_arp_empty_ones)) { |
d44f7746 CW |
782 | lec_arp_check_empties(priv, vcc, skb); |
783 | } | |
d44f7746 | 784 | skb_pull(skb, 2); /* skip lec_id */ |
1da177e4 | 785 | #ifdef CONFIG_TR |
d44f7746 CW |
786 | if (priv->is_trdev) |
787 | skb->protocol = tr_type_trans(skb, dev); | |
788 | else | |
1da177e4 | 789 | #endif |
d44f7746 | 790 | skb->protocol = eth_type_trans(skb, dev); |
162619e5 SH |
791 | dev->stats.rx_packets++; |
792 | dev->stats.rx_bytes += skb->len; | |
d44f7746 CW |
793 | memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data)); |
794 | netif_rx(skb); | |
795 | } | |
1da177e4 LT |
796 | } |
797 | ||
d44f7746 | 798 | static void lec_pop(struct atm_vcc *vcc, struct sk_buff *skb) |
1da177e4 LT |
799 | { |
800 | struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); | |
801 | struct net_device *dev = skb->dev; | |
802 | ||
803 | if (vpriv == NULL) { | |
804 | printk("lec_pop(): vpriv = NULL!?!?!?\n"); | |
805 | return; | |
806 | } | |
807 | ||
808 | vpriv->old_pop(vcc, skb); | |
809 | ||
810 | if (vpriv->xoff && atm_may_send(vcc, 0)) { | |
811 | vpriv->xoff = 0; | |
812 | if (netif_running(dev) && netif_queue_stopped(dev)) | |
813 | netif_wake_queue(dev); | |
814 | } | |
815 | } | |
816 | ||
d44f7746 | 817 | static int lec_vcc_attach(struct atm_vcc *vcc, void __user *arg) |
1da177e4 LT |
818 | { |
819 | struct lec_vcc_priv *vpriv; | |
d44f7746 CW |
820 | int bytes_left; |
821 | struct atmlec_ioc ioc_data; | |
822 | ||
823 | /* Lecd must be up in this case */ | |
824 | bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc)); | |
825 | if (bytes_left != 0) { | |
826 | printk | |
827 | ("lec: lec_vcc_attach, copy from user failed for %d bytes\n", | |
828 | bytes_left); | |
829 | } | |
830 | if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF || | |
831 | !dev_lec[ioc_data.dev_num]) | |
832 | return -EINVAL; | |
1da177e4 LT |
833 | if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL))) |
834 | return -ENOMEM; | |
835 | vpriv->xoff = 0; | |
836 | vpriv->old_pop = vcc->pop; | |
837 | vcc->user_back = vpriv; | |
838 | vcc->pop = lec_pop; | |
524ad0a7 | 839 | lec_vcc_added(netdev_priv(dev_lec[ioc_data.dev_num]), |
d44f7746 CW |
840 | &ioc_data, vcc, vcc->push); |
841 | vcc->proto_data = dev_lec[ioc_data.dev_num]; | |
842 | vcc->push = lec_push; | |
843 | return 0; | |
1da177e4 LT |
844 | } |
845 | ||
d44f7746 | 846 | static int lec_mcast_attach(struct atm_vcc *vcc, int arg) |
1da177e4 | 847 | { |
d44f7746 CW |
848 | if (arg < 0 || arg >= MAX_LEC_ITF || !dev_lec[arg]) |
849 | return -EINVAL; | |
850 | vcc->proto_data = dev_lec[arg]; | |
524ad0a7 WC |
851 | return lec_mcast_make((struct lec_priv *)netdev_priv(dev_lec[arg]), |
852 | vcc); | |
1da177e4 LT |
853 | } |
854 | ||
855 | /* Initialize device. */ | |
d44f7746 CW |
856 | static int lecd_attach(struct atm_vcc *vcc, int arg) |
857 | { | |
858 | int i; | |
859 | struct lec_priv *priv; | |
860 | ||
861 | if (arg < 0) | |
862 | i = 0; | |
863 | else | |
864 | i = arg; | |
1da177e4 | 865 | #ifdef CONFIG_TR |
d44f7746 CW |
866 | if (arg >= MAX_LEC_ITF) |
867 | return -EINVAL; | |
868 | #else /* Reserve the top NUM_TR_DEVS for TR */ | |
869 | if (arg >= (MAX_LEC_ITF - NUM_TR_DEVS)) | |
870 | return -EINVAL; | |
1da177e4 | 871 | #endif |
d44f7746 CW |
872 | if (!dev_lec[i]) { |
873 | int is_trdev, size; | |
1da177e4 | 874 | |
d44f7746 CW |
875 | is_trdev = 0; |
876 | if (i >= (MAX_LEC_ITF - NUM_TR_DEVS)) | |
877 | is_trdev = 1; | |
1da177e4 | 878 | |
d44f7746 | 879 | size = sizeof(struct lec_priv); |
1da177e4 | 880 | #ifdef CONFIG_TR |
d44f7746 CW |
881 | if (is_trdev) |
882 | dev_lec[i] = alloc_trdev(size); | |
883 | else | |
1da177e4 | 884 | #endif |
d44f7746 CW |
885 | dev_lec[i] = alloc_etherdev(size); |
886 | if (!dev_lec[i]) | |
887 | return -ENOMEM; | |
eb044588 | 888 | dev_lec[i]->netdev_ops = &lec_netdev_ops; |
d44f7746 CW |
889 | snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i); |
890 | if (register_netdev(dev_lec[i])) { | |
891 | free_netdev(dev_lec[i]); | |
892 | return -EINVAL; | |
893 | } | |
894 | ||
524ad0a7 | 895 | priv = netdev_priv(dev_lec[i]); |
d44f7746 | 896 | priv->is_trdev = is_trdev; |
d44f7746 | 897 | } else { |
524ad0a7 | 898 | priv = netdev_priv(dev_lec[i]); |
d44f7746 CW |
899 | if (priv->lecd) |
900 | return -EADDRINUSE; | |
901 | } | |
902 | lec_arp_init(priv); | |
903 | priv->itfnum = i; /* LANE2 addition */ | |
904 | priv->lecd = vcc; | |
905 | vcc->dev = &lecatm_dev; | |
906 | vcc_insert_socket(sk_atm(vcc)); | |
907 | ||
908 | vcc->proto_data = dev_lec[i]; | |
909 | set_bit(ATM_VF_META, &vcc->flags); | |
910 | set_bit(ATM_VF_READY, &vcc->flags); | |
911 | ||
912 | /* Set default values to these variables */ | |
913 | priv->maximum_unknown_frame_count = 1; | |
914 | priv->max_unknown_frame_time = (1 * HZ); | |
915 | priv->vcc_timeout_period = (1200 * HZ); | |
916 | priv->max_retry_count = 1; | |
917 | priv->aging_time = (300 * HZ); | |
918 | priv->forward_delay_time = (15 * HZ); | |
919 | priv->topology_change = 0; | |
920 | priv->arp_response_time = (1 * HZ); | |
921 | priv->flush_timeout = (4 * HZ); | |
922 | priv->path_switching_delay = (6 * HZ); | |
923 | ||
924 | if (dev_lec[i]->flags & IFF_UP) { | |
925 | netif_start_queue(dev_lec[i]); | |
926 | } | |
927 | __module_get(THIS_MODULE); | |
928 | return i; | |
1da177e4 LT |
929 | } |
930 | ||
931 | #ifdef CONFIG_PROC_FS | |
36cbd3dc | 932 | static const char *lec_arp_get_status_string(unsigned char status) |
1da177e4 | 933 | { |
36cbd3dc | 934 | static const char *const lec_arp_status_string[] = { |
1da177e4 LT |
935 | "ESI_UNKNOWN ", |
936 | "ESI_ARP_PENDING ", | |
937 | "ESI_VC_PENDING ", | |
938 | "<Undefined> ", | |
939 | "ESI_FLUSH_PENDING ", | |
940 | "ESI_FORWARD_DIRECT" | |
941 | }; | |
942 | ||
943 | if (status > ESI_FORWARD_DIRECT) | |
944 | status = 3; /* ESI_UNDEFINED */ | |
945 | return lec_arp_status_string[status]; | |
946 | } | |
947 | ||
948 | static void lec_info(struct seq_file *seq, struct lec_arp_table *entry) | |
949 | { | |
950 | int i; | |
951 | ||
952 | for (i = 0; i < ETH_ALEN; i++) | |
953 | seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff); | |
954 | seq_printf(seq, " "); | |
955 | for (i = 0; i < ATM_ESA_LEN; i++) | |
956 | seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff); | |
957 | seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status), | |
958 | entry->flags & 0xffff); | |
959 | if (entry->vcc) | |
960 | seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci); | |
961 | else | |
d44f7746 | 962 | seq_printf(seq, " "); |
1da177e4 LT |
963 | if (entry->recv_vcc) { |
964 | seq_printf(seq, " %3d %3d", entry->recv_vcc->vpi, | |
965 | entry->recv_vcc->vci); | |
d44f7746 CW |
966 | } |
967 | seq_putc(seq, '\n'); | |
1da177e4 LT |
968 | } |
969 | ||
1da177e4 LT |
970 | struct lec_state { |
971 | unsigned long flags; | |
972 | struct lec_priv *locked; | |
d0732f64 | 973 | struct hlist_node *node; |
1da177e4 LT |
974 | struct net_device *dev; |
975 | int itf; | |
976 | int arp_table; | |
977 | int misc_table; | |
978 | }; | |
979 | ||
d0732f64 | 980 | static void *lec_tbl_walk(struct lec_state *state, struct hlist_head *tbl, |
1da177e4 LT |
981 | loff_t *l) |
982 | { | |
d0732f64 CW |
983 | struct hlist_node *e = state->node; |
984 | struct lec_arp_table *tmp; | |
1da177e4 LT |
985 | |
986 | if (!e) | |
d0732f64 | 987 | e = tbl->first; |
2e1e9848 | 988 | if (e == SEQ_START_TOKEN) { |
d0732f64 | 989 | e = tbl->first; |
1da177e4 LT |
990 | --*l; |
991 | } | |
d0732f64 CW |
992 | |
993 | hlist_for_each_entry_from(tmp, e, next) { | |
1da177e4 LT |
994 | if (--*l < 0) |
995 | break; | |
996 | } | |
d0732f64 CW |
997 | state->node = e; |
998 | ||
1da177e4 LT |
999 | return (*l < 0) ? state : NULL; |
1000 | } | |
1001 | ||
1002 | static void *lec_arp_walk(struct lec_state *state, loff_t *l, | |
d44f7746 | 1003 | struct lec_priv *priv) |
1da177e4 LT |
1004 | { |
1005 | void *v = NULL; | |
1006 | int p; | |
1007 | ||
1008 | for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) { | |
d0732f64 | 1009 | v = lec_tbl_walk(state, &priv->lec_arp_tables[p], l); |
1da177e4 LT |
1010 | if (v) |
1011 | break; | |
1012 | } | |
1013 | state->arp_table = p; | |
1014 | return v; | |
1015 | } | |
1016 | ||
1017 | static void *lec_misc_walk(struct lec_state *state, loff_t *l, | |
1018 | struct lec_priv *priv) | |
1019 | { | |
d0732f64 CW |
1020 | struct hlist_head *lec_misc_tables[] = { |
1021 | &priv->lec_arp_empty_ones, | |
1022 | &priv->lec_no_forward, | |
1023 | &priv->mcast_fwds | |
1da177e4 LT |
1024 | }; |
1025 | void *v = NULL; | |
1026 | int q; | |
1027 | ||
1028 | for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) { | |
1029 | v = lec_tbl_walk(state, lec_misc_tables[q], l); | |
1030 | if (v) | |
1031 | break; | |
1032 | } | |
1033 | state->misc_table = q; | |
1034 | return v; | |
1035 | } | |
1036 | ||
1037 | static void *lec_priv_walk(struct lec_state *state, loff_t *l, | |
1038 | struct lec_priv *priv) | |
1039 | { | |
1040 | if (!state->locked) { | |
1041 | state->locked = priv; | |
1042 | spin_lock_irqsave(&priv->lec_arp_lock, state->flags); | |
1043 | } | |
d44f7746 | 1044 | if (!lec_arp_walk(state, l, priv) && !lec_misc_walk(state, l, priv)) { |
1da177e4 LT |
1045 | spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags); |
1046 | state->locked = NULL; | |
1047 | /* Partial state reset for the next time we get called */ | |
1048 | state->arp_table = state->misc_table = 0; | |
1049 | } | |
1050 | return state->locked; | |
1051 | } | |
1052 | ||
1053 | static void *lec_itf_walk(struct lec_state *state, loff_t *l) | |
1054 | { | |
1055 | struct net_device *dev; | |
1056 | void *v; | |
1057 | ||
1058 | dev = state->dev ? state->dev : dev_lec[state->itf]; | |
524ad0a7 WC |
1059 | v = (dev && netdev_priv(dev)) ? |
1060 | lec_priv_walk(state, l, netdev_priv(dev)) : NULL; | |
1da177e4 LT |
1061 | if (!v && dev) { |
1062 | dev_put(dev); | |
1063 | /* Partial state reset for the next time we get called */ | |
1064 | dev = NULL; | |
1065 | } | |
1066 | state->dev = dev; | |
1067 | return v; | |
1068 | } | |
1069 | ||
1070 | static void *lec_get_idx(struct lec_state *state, loff_t l) | |
1071 | { | |
1072 | void *v = NULL; | |
1073 | ||
1074 | for (; state->itf < MAX_LEC_ITF; state->itf++) { | |
1075 | v = lec_itf_walk(state, &l); | |
1076 | if (v) | |
1077 | break; | |
1078 | } | |
d44f7746 | 1079 | return v; |
1da177e4 LT |
1080 | } |
1081 | ||
1082 | static void *lec_seq_start(struct seq_file *seq, loff_t *pos) | |
1083 | { | |
1084 | struct lec_state *state = seq->private; | |
1085 | ||
1086 | state->itf = 0; | |
1087 | state->dev = NULL; | |
1088 | state->locked = NULL; | |
1089 | state->arp_table = 0; | |
1090 | state->misc_table = 0; | |
2e1e9848 | 1091 | state->node = SEQ_START_TOKEN; |
1da177e4 | 1092 | |
2e1e9848 | 1093 | return *pos ? lec_get_idx(state, *pos) : SEQ_START_TOKEN; |
1da177e4 LT |
1094 | } |
1095 | ||
1096 | static void lec_seq_stop(struct seq_file *seq, void *v) | |
1097 | { | |
1098 | struct lec_state *state = seq->private; | |
1099 | ||
1100 | if (state->dev) { | |
1101 | spin_unlock_irqrestore(&state->locked->lec_arp_lock, | |
1102 | state->flags); | |
1103 | dev_put(state->dev); | |
1104 | } | |
1105 | } | |
1106 | ||
1107 | static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1108 | { | |
1109 | struct lec_state *state = seq->private; | |
1110 | ||
1111 | v = lec_get_idx(state, 1); | |
1112 | *pos += !!PTR_ERR(v); | |
1113 | return v; | |
1114 | } | |
1115 | ||
1116 | static int lec_seq_show(struct seq_file *seq, void *v) | |
1117 | { | |
36cbd3dc JE |
1118 | static const char lec_banner[] = |
1119 | "Itf MAC ATM destination" | |
d44f7746 CW |
1120 | " Status Flags " |
1121 | "VPI/VCI Recv VPI/VCI\n"; | |
1da177e4 | 1122 | |
2e1e9848 | 1123 | if (v == SEQ_START_TOKEN) |
1da177e4 LT |
1124 | seq_puts(seq, lec_banner); |
1125 | else { | |
1126 | struct lec_state *state = seq->private; | |
d44f7746 | 1127 | struct net_device *dev = state->dev; |
d0732f64 | 1128 | struct lec_arp_table *entry = hlist_entry(state->node, struct lec_arp_table, next); |
1da177e4 LT |
1129 | |
1130 | seq_printf(seq, "%s ", dev->name); | |
d0732f64 | 1131 | lec_info(seq, entry); |
1da177e4 LT |
1132 | } |
1133 | return 0; | |
1134 | } | |
1135 | ||
56b3d975 | 1136 | static const struct seq_operations lec_seq_ops = { |
d44f7746 CW |
1137 | .start = lec_seq_start, |
1138 | .next = lec_seq_next, | |
1139 | .stop = lec_seq_stop, | |
1140 | .show = lec_seq_show, | |
1da177e4 LT |
1141 | }; |
1142 | ||
1143 | static int lec_seq_open(struct inode *inode, struct file *file) | |
1144 | { | |
9a8c09e7 | 1145 | return seq_open_private(file, &lec_seq_ops, sizeof(struct lec_state)); |
1da177e4 LT |
1146 | } |
1147 | ||
9a32144e | 1148 | static const struct file_operations lec_seq_fops = { |
d44f7746 CW |
1149 | .owner = THIS_MODULE, |
1150 | .open = lec_seq_open, | |
1151 | .read = seq_read, | |
1152 | .llseek = seq_lseek, | |
9a8c09e7 | 1153 | .release = seq_release_private, |
1da177e4 LT |
1154 | }; |
1155 | #endif | |
1156 | ||
1157 | static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
1158 | { | |
1159 | struct atm_vcc *vcc = ATM_SD(sock); | |
1160 | int err = 0; | |
d44f7746 | 1161 | |
1da177e4 | 1162 | switch (cmd) { |
d44f7746 CW |
1163 | case ATMLEC_CTRL: |
1164 | case ATMLEC_MCAST: | |
1165 | case ATMLEC_DATA: | |
1166 | if (!capable(CAP_NET_ADMIN)) | |
1167 | return -EPERM; | |
1168 | break; | |
1169 | default: | |
1170 | return -ENOIOCTLCMD; | |
1da177e4 LT |
1171 | } |
1172 | ||
1173 | switch (cmd) { | |
d44f7746 CW |
1174 | case ATMLEC_CTRL: |
1175 | err = lecd_attach(vcc, (int)arg); | |
1176 | if (err >= 0) | |
1177 | sock->state = SS_CONNECTED; | |
1178 | break; | |
1179 | case ATMLEC_MCAST: | |
1180 | err = lec_mcast_attach(vcc, (int)arg); | |
1181 | break; | |
1182 | case ATMLEC_DATA: | |
1183 | err = lec_vcc_attach(vcc, (void __user *)arg); | |
1184 | break; | |
1da177e4 LT |
1185 | } |
1186 | ||
1187 | return err; | |
1188 | } | |
1189 | ||
1190 | static struct atm_ioctl lane_ioctl_ops = { | |
d44f7746 CW |
1191 | .owner = THIS_MODULE, |
1192 | .ioctl = lane_ioctl, | |
1da177e4 LT |
1193 | }; |
1194 | ||
1195 | static int __init lane_module_init(void) | |
1196 | { | |
1197 | #ifdef CONFIG_PROC_FS | |
1198 | struct proc_dir_entry *p; | |
1199 | ||
16e297b3 | 1200 | p = proc_create("lec", S_IRUGO, atm_proc_root, &lec_seq_fops); |
dbee0d3f WC |
1201 | if (!p) { |
1202 | printk(KERN_ERR "Unable to initialize /proc/net/atm/lec\n"); | |
1203 | return -ENOMEM; | |
1204 | } | |
1da177e4 LT |
1205 | #endif |
1206 | ||
1207 | register_atm_ioctl(&lane_ioctl_ops); | |
d44f7746 CW |
1208 | printk("lec.c: " __DATE__ " " __TIME__ " initialized\n"); |
1209 | return 0; | |
1da177e4 LT |
1210 | } |
1211 | ||
1212 | static void __exit lane_module_cleanup(void) | |
1213 | { | |
d44f7746 CW |
1214 | int i; |
1215 | struct lec_priv *priv; | |
1da177e4 LT |
1216 | |
1217 | remove_proc_entry("lec", atm_proc_root); | |
1218 | ||
1219 | deregister_atm_ioctl(&lane_ioctl_ops); | |
1220 | ||
d44f7746 CW |
1221 | for (i = 0; i < MAX_LEC_ITF; i++) { |
1222 | if (dev_lec[i] != NULL) { | |
524ad0a7 | 1223 | priv = netdev_priv(dev_lec[i]); |
1da177e4 | 1224 | unregister_netdev(dev_lec[i]); |
d44f7746 CW |
1225 | free_netdev(dev_lec[i]); |
1226 | dev_lec[i] = NULL; | |
1227 | } | |
1228 | } | |
1da177e4 | 1229 | |
d44f7746 | 1230 | return; |
1da177e4 LT |
1231 | } |
1232 | ||
1233 | module_init(lane_module_init); | |
1234 | module_exit(lane_module_cleanup); | |
1235 | ||
1236 | /* | |
1237 | * LANE2: 3.1.3, LE_RESOLVE.request | |
1238 | * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs. | |
1239 | * If sizeoftlvs == NULL the default TLVs associated with with this | |
1240 | * lec will be used. | |
1241 | * If dst_mac == NULL, targetless LE_ARP will be sent | |
1242 | */ | |
61c33e01 | 1243 | static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force, |
d44f7746 | 1244 | u8 **tlvs, u32 *sizeoftlvs) |
1da177e4 LT |
1245 | { |
1246 | unsigned long flags; | |
524ad0a7 | 1247 | struct lec_priv *priv = netdev_priv(dev); |
d44f7746 CW |
1248 | struct lec_arp_table *table; |
1249 | struct sk_buff *skb; | |
1250 | int retval; | |
1da177e4 | 1251 | |
d44f7746 | 1252 | if (force == 0) { |
1da177e4 | 1253 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
d44f7746 | 1254 | table = lec_arp_find(priv, dst_mac); |
1da177e4 | 1255 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
d44f7746 CW |
1256 | if (table == NULL) |
1257 | return -1; | |
1258 | ||
2afe37cd | 1259 | *tlvs = kmemdup(table->tlvs, table->sizeoftlvs, GFP_ATOMIC); |
d44f7746 CW |
1260 | if (*tlvs == NULL) |
1261 | return -1; | |
1262 | ||
d44f7746 CW |
1263 | *sizeoftlvs = table->sizeoftlvs; |
1264 | ||
1265 | return 0; | |
1266 | } | |
1da177e4 LT |
1267 | |
1268 | if (sizeoftlvs == NULL) | |
1269 | retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL); | |
d44f7746 | 1270 | |
1da177e4 LT |
1271 | else { |
1272 | skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC); | |
1273 | if (skb == NULL) | |
1274 | return -1; | |
1275 | skb->len = *sizeoftlvs; | |
27d7ff46 | 1276 | skb_copy_to_linear_data(skb, *tlvs, *sizeoftlvs); |
1da177e4 LT |
1277 | retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb); |
1278 | } | |
d44f7746 CW |
1279 | return retval; |
1280 | } | |
1da177e4 LT |
1281 | |
1282 | /* | |
1283 | * LANE2: 3.1.4, LE_ASSOCIATE.request | |
1284 | * Associate the *tlvs with the *lan_dst address. | |
1285 | * Will overwrite any previous association | |
1286 | * Returns 1 for success, 0 for failure (out of memory) | |
1287 | * | |
1288 | */ | |
61c33e01 MBJ |
1289 | static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst, |
1290 | const u8 *tlvs, u32 sizeoftlvs) | |
1da177e4 | 1291 | { |
d44f7746 CW |
1292 | int retval; |
1293 | struct sk_buff *skb; | |
524ad0a7 | 1294 | struct lec_priv *priv = netdev_priv(dev); |
d44f7746 CW |
1295 | |
1296 | if (compare_ether_addr(lan_dst, dev->dev_addr)) | |
1297 | return (0); /* not our mac address */ | |
1298 | ||
1299 | kfree(priv->tlvs); /* NULL if there was no previous association */ | |
1300 | ||
2afe37cd | 1301 | priv->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL); |
d44f7746 CW |
1302 | if (priv->tlvs == NULL) |
1303 | return (0); | |
1304 | priv->sizeoftlvs = sizeoftlvs; | |
d44f7746 CW |
1305 | |
1306 | skb = alloc_skb(sizeoftlvs, GFP_ATOMIC); | |
1307 | if (skb == NULL) | |
1308 | return 0; | |
1309 | skb->len = sizeoftlvs; | |
27d7ff46 | 1310 | skb_copy_to_linear_data(skb, tlvs, sizeoftlvs); |
d44f7746 CW |
1311 | retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb); |
1312 | if (retval != 0) | |
1313 | printk("lec.c: lane2_associate_req() failed\n"); | |
1314 | /* | |
1315 | * If the previous association has changed we must | |
1316 | * somehow notify other LANE entities about the change | |
1317 | */ | |
1318 | return (1); | |
1da177e4 LT |
1319 | } |
1320 | ||
1321 | /* | |
1322 | * LANE2: 3.1.5, LE_ASSOCIATE.indication | |
1323 | * | |
1324 | */ | |
61c33e01 MBJ |
1325 | static void lane2_associate_ind(struct net_device *dev, const u8 *mac_addr, |
1326 | const u8 *tlvs, u32 sizeoftlvs) | |
1da177e4 LT |
1327 | { |
1328 | #if 0 | |
d44f7746 | 1329 | int i = 0; |
1da177e4 | 1330 | #endif |
524ad0a7 | 1331 | struct lec_priv *priv = netdev_priv(dev); |
d44f7746 CW |
1332 | #if 0 /* |
1333 | * Why have the TLVs in LE_ARP entries | |
1334 | * since we do not use them? When you | |
1335 | * uncomment this code, make sure the | |
1336 | * TLVs get freed when entry is killed | |
1337 | */ | |
1338 | struct lec_arp_table *entry = lec_arp_find(priv, mac_addr); | |
1da177e4 | 1339 | |
d44f7746 CW |
1340 | if (entry == NULL) |
1341 | return; /* should not happen */ | |
1da177e4 | 1342 | |
d44f7746 | 1343 | kfree(entry->tlvs); |
1da177e4 | 1344 | |
2afe37cd | 1345 | entry->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL); |
d44f7746 CW |
1346 | if (entry->tlvs == NULL) |
1347 | return; | |
d44f7746 | 1348 | entry->sizeoftlvs = sizeoftlvs; |
1da177e4 LT |
1349 | #endif |
1350 | #if 0 | |
d44f7746 CW |
1351 | printk("lec.c: lane2_associate_ind()\n"); |
1352 | printk("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs); | |
1353 | while (i < sizeoftlvs) | |
1354 | printk("%02x ", tlvs[i++]); | |
1355 | ||
1356 | printk("\n"); | |
1da177e4 LT |
1357 | #endif |
1358 | ||
d44f7746 CW |
1359 | /* tell MPOA about the TLVs we saw */ |
1360 | if (priv->lane2_ops && priv->lane2_ops->associate_indicator) { | |
1361 | priv->lane2_ops->associate_indicator(dev, mac_addr, | |
1362 | tlvs, sizeoftlvs); | |
1363 | } | |
1364 | return; | |
1da177e4 LT |
1365 | } |
1366 | ||
1367 | /* | |
1368 | * Here starts what used to lec_arpc.c | |
1369 | * | |
1370 | * lec_arpc.c was added here when making | |
1371 | * lane client modular. October 1997 | |
1da177e4 LT |
1372 | */ |
1373 | ||
1374 | #include <linux/types.h> | |
1da177e4 LT |
1375 | #include <linux/timer.h> |
1376 | #include <asm/param.h> | |
1377 | #include <asm/atomic.h> | |
1378 | #include <linux/inetdevice.h> | |
1379 | #include <net/route.h> | |
1380 | ||
1da177e4 | 1381 | #if 0 |
52240062 | 1382 | #define pr_debug(format,args...) |
1da177e4 | 1383 | /* |
52240062 | 1384 | #define pr_debug printk |
1da177e4 LT |
1385 | */ |
1386 | #endif | |
1387 | #define DEBUG_ARP_TABLE 0 | |
1388 | ||
1389 | #define LEC_ARP_REFRESH_INTERVAL (3*HZ) | |
1390 | ||
c4028958 | 1391 | static void lec_arp_check_expire(struct work_struct *work); |
1da177e4 LT |
1392 | static void lec_arp_expire_arp(unsigned long data); |
1393 | ||
f7d57453 | 1394 | /* |
1da177e4 LT |
1395 | * Arp table funcs |
1396 | */ | |
1397 | ||
1398 | #define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE -1)) | |
1399 | ||
1400 | /* | |
1401 | * Initialization of arp-cache | |
1402 | */ | |
1fa9961d | 1403 | static void lec_arp_init(struct lec_priv *priv) |
1da177e4 | 1404 | { |
1fa9961d | 1405 | unsigned short i; |
1da177e4 | 1406 | |
1fa9961d | 1407 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
d0732f64 | 1408 | INIT_HLIST_HEAD(&priv->lec_arp_tables[i]); |
1fa9961d | 1409 | } |
f7d57453 YH |
1410 | INIT_HLIST_HEAD(&priv->lec_arp_empty_ones); |
1411 | INIT_HLIST_HEAD(&priv->lec_no_forward); | |
1412 | INIT_HLIST_HEAD(&priv->mcast_fwds); | |
1da177e4 | 1413 | spin_lock_init(&priv->lec_arp_lock); |
c4028958 | 1414 | INIT_DELAYED_WORK(&priv->lec_arp_work, lec_arp_check_expire); |
987e46bd | 1415 | schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL); |
1da177e4 LT |
1416 | } |
1417 | ||
1fa9961d | 1418 | static void lec_arp_clear_vccs(struct lec_arp_table *entry) |
1da177e4 | 1419 | { |
1fa9961d | 1420 | if (entry->vcc) { |
1da177e4 LT |
1421 | struct atm_vcc *vcc = entry->vcc; |
1422 | struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); | |
1fa9961d | 1423 | struct net_device *dev = (struct net_device *)vcc->proto_data; |
1da177e4 | 1424 | |
1fa9961d | 1425 | vcc->pop = vpriv->old_pop; |
1da177e4 LT |
1426 | if (vpriv->xoff) |
1427 | netif_wake_queue(dev); | |
1428 | kfree(vpriv); | |
1429 | vcc->user_back = NULL; | |
1fa9961d | 1430 | vcc->push = entry->old_push; |
1da177e4 | 1431 | vcc_release_async(vcc, -EPIPE); |
d0732f64 | 1432 | entry->vcc = NULL; |
1fa9961d CW |
1433 | } |
1434 | if (entry->recv_vcc) { | |
1435 | entry->recv_vcc->push = entry->old_recv_push; | |
1da177e4 | 1436 | vcc_release_async(entry->recv_vcc, -EPIPE); |
1fa9961d CW |
1437 | entry->recv_vcc = NULL; |
1438 | } | |
1da177e4 LT |
1439 | } |
1440 | ||
1441 | /* | |
1442 | * Insert entry to lec_arp_table | |
1443 | * LANE2: Add to the end of the list to satisfy 8.1.13 | |
1444 | */ | |
1fa9961d | 1445 | static inline void |
d0732f64 | 1446 | lec_arp_add(struct lec_priv *priv, struct lec_arp_table *entry) |
1da177e4 | 1447 | { |
d0732f64 | 1448 | struct hlist_head *tmp; |
1fa9961d | 1449 | |
d0732f64 CW |
1450 | tmp = &priv->lec_arp_tables[HASH(entry->mac_addr[ETH_ALEN - 1])]; |
1451 | hlist_add_head(&entry->next, tmp); | |
1fa9961d | 1452 | |
52240062 | 1453 | pr_debug("LEC_ARP: Added entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n", |
d0732f64 CW |
1454 | 0xff & entry->mac_addr[0], 0xff & entry->mac_addr[1], |
1455 | 0xff & entry->mac_addr[2], 0xff & entry->mac_addr[3], | |
1456 | 0xff & entry->mac_addr[4], 0xff & entry->mac_addr[5]); | |
1da177e4 LT |
1457 | } |
1458 | ||
1459 | /* | |
1460 | * Remove entry from lec_arp_table | |
1461 | */ | |
1fa9961d CW |
1462 | static int |
1463 | lec_arp_remove(struct lec_priv *priv, struct lec_arp_table *to_remove) | |
1da177e4 | 1464 | { |
d0732f64 CW |
1465 | struct hlist_node *node; |
1466 | struct lec_arp_table *entry; | |
1467 | int i, remove_vcc = 1; | |
1fa9961d CW |
1468 | |
1469 | if (!to_remove) { | |
1470 | return -1; | |
1471 | } | |
d0732f64 CW |
1472 | |
1473 | hlist_del(&to_remove->next); | |
1fa9961d CW |
1474 | del_timer(&to_remove->timer); |
1475 | ||
d0732f64 | 1476 | /* If this is the only MAC connected to this VCC, also tear down the VCC */ |
1fa9961d CW |
1477 | if (to_remove->status >= ESI_FLUSH_PENDING) { |
1478 | /* | |
1479 | * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT | |
1480 | */ | |
d0732f64 CW |
1481 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
1482 | hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) { | |
1483 | if (memcmp(to_remove->atm_addr, | |
1484 | entry->atm_addr, ATM_ESA_LEN) == 0) { | |
1fa9961d CW |
1485 | remove_vcc = 0; |
1486 | break; | |
1487 | } | |
1488 | } | |
1489 | } | |
1490 | if (remove_vcc) | |
1491 | lec_arp_clear_vccs(to_remove); | |
1492 | } | |
1493 | skb_queue_purge(&to_remove->tx_wait); /* FIXME: good place for this? */ | |
1494 | ||
52240062 | 1495 | pr_debug("LEC_ARP: Removed entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n", |
1fa9961d CW |
1496 | 0xff & to_remove->mac_addr[0], 0xff & to_remove->mac_addr[1], |
1497 | 0xff & to_remove->mac_addr[2], 0xff & to_remove->mac_addr[3], | |
1498 | 0xff & to_remove->mac_addr[4], 0xff & to_remove->mac_addr[5]); | |
1499 | return 0; | |
1da177e4 LT |
1500 | } |
1501 | ||
1502 | #if DEBUG_ARP_TABLE | |
36cbd3dc | 1503 | static const char *get_status_string(unsigned char st) |
1da177e4 | 1504 | { |
1fa9961d CW |
1505 | switch (st) { |
1506 | case ESI_UNKNOWN: | |
1507 | return "ESI_UNKNOWN"; | |
1508 | case ESI_ARP_PENDING: | |
1509 | return "ESI_ARP_PENDING"; | |
1510 | case ESI_VC_PENDING: | |
1511 | return "ESI_VC_PENDING"; | |
1512 | case ESI_FLUSH_PENDING: | |
1513 | return "ESI_FLUSH_PENDING"; | |
1514 | case ESI_FORWARD_DIRECT: | |
1515 | return "ESI_FORWARD_DIRECT"; | |
1516 | default: | |
1517 | return "<UNKNOWN>"; | |
1518 | } | |
1da177e4 | 1519 | } |
1da177e4 | 1520 | |
1fa9961d | 1521 | static void dump_arp_table(struct lec_priv *priv) |
1da177e4 | 1522 | { |
d0732f64 | 1523 | struct hlist_node *node; |
1fa9961d | 1524 | struct lec_arp_table *rulla; |
d0732f64 CW |
1525 | char buf[256]; |
1526 | int i, j, offset; | |
1fa9961d CW |
1527 | |
1528 | printk("Dump %p:\n", priv); | |
1529 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { | |
d0732f64 CW |
1530 | hlist_for_each_entry(rulla, node, &priv->lec_arp_tables[i], next) { |
1531 | offset = 0; | |
1532 | offset += sprintf(buf, "%d: %p\n", i, rulla); | |
1fa9961d CW |
1533 | offset += sprintf(buf + offset, "Mac:"); |
1534 | for (j = 0; j < ETH_ALEN; j++) { | |
1535 | offset += sprintf(buf + offset, | |
1536 | "%2.2x ", | |
1537 | rulla->mac_addr[j] & 0xff); | |
1538 | } | |
1539 | offset += sprintf(buf + offset, "Atm:"); | |
1540 | for (j = 0; j < ATM_ESA_LEN; j++) { | |
1541 | offset += sprintf(buf + offset, | |
1542 | "%2.2x ", | |
1543 | rulla->atm_addr[j] & 0xff); | |
1544 | } | |
1545 | offset += sprintf(buf + offset, | |
1546 | "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", | |
1547 | rulla->vcc ? rulla->vcc->vpi : 0, | |
1548 | rulla->vcc ? rulla->vcc->vci : 0, | |
1549 | rulla->recv_vcc ? rulla->recv_vcc-> | |
1550 | vpi : 0, | |
1551 | rulla->recv_vcc ? rulla->recv_vcc-> | |
1552 | vci : 0, rulla->last_used, | |
1553 | rulla->timestamp, rulla->no_tries); | |
1554 | offset += | |
1555 | sprintf(buf + offset, | |
1556 | "Flags:%x, Packets_flooded:%x, Status: %s ", | |
1557 | rulla->flags, rulla->packets_flooded, | |
1558 | get_status_string(rulla->status)); | |
d0732f64 | 1559 | printk("%s\n", buf); |
1fa9961d | 1560 | } |
1fa9961d | 1561 | } |
d0732f64 CW |
1562 | |
1563 | if (!hlist_empty(&priv->lec_no_forward)) | |
1fa9961d | 1564 | printk("No forward\n"); |
d0732f64 | 1565 | hlist_for_each_entry(rulla, node, &priv->lec_no_forward, next) { |
1fa9961d CW |
1566 | offset = 0; |
1567 | offset += sprintf(buf + offset, "Mac:"); | |
1568 | for (j = 0; j < ETH_ALEN; j++) { | |
1569 | offset += sprintf(buf + offset, "%2.2x ", | |
1570 | rulla->mac_addr[j] & 0xff); | |
1571 | } | |
1572 | offset += sprintf(buf + offset, "Atm:"); | |
1573 | for (j = 0; j < ATM_ESA_LEN; j++) { | |
1574 | offset += sprintf(buf + offset, "%2.2x ", | |
1575 | rulla->atm_addr[j] & 0xff); | |
1576 | } | |
1577 | offset += sprintf(buf + offset, | |
1578 | "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", | |
1579 | rulla->vcc ? rulla->vcc->vpi : 0, | |
1580 | rulla->vcc ? rulla->vcc->vci : 0, | |
1581 | rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, | |
1582 | rulla->recv_vcc ? rulla->recv_vcc->vci : 0, | |
1583 | rulla->last_used, | |
1584 | rulla->timestamp, rulla->no_tries); | |
1585 | offset += sprintf(buf + offset, | |
1586 | "Flags:%x, Packets_flooded:%x, Status: %s ", | |
1587 | rulla->flags, rulla->packets_flooded, | |
1588 | get_status_string(rulla->status)); | |
d0732f64 | 1589 | printk("%s\n", buf); |
1fa9961d | 1590 | } |
d0732f64 CW |
1591 | |
1592 | if (!hlist_empty(&priv->lec_arp_empty_ones)) | |
1fa9961d | 1593 | printk("Empty ones\n"); |
d0732f64 | 1594 | hlist_for_each_entry(rulla, node, &priv->lec_arp_empty_ones, next) { |
1fa9961d CW |
1595 | offset = 0; |
1596 | offset += sprintf(buf + offset, "Mac:"); | |
1597 | for (j = 0; j < ETH_ALEN; j++) { | |
1598 | offset += sprintf(buf + offset, "%2.2x ", | |
1599 | rulla->mac_addr[j] & 0xff); | |
1600 | } | |
1601 | offset += sprintf(buf + offset, "Atm:"); | |
1602 | for (j = 0; j < ATM_ESA_LEN; j++) { | |
1603 | offset += sprintf(buf + offset, "%2.2x ", | |
1604 | rulla->atm_addr[j] & 0xff); | |
1605 | } | |
1606 | offset += sprintf(buf + offset, | |
1607 | "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", | |
1608 | rulla->vcc ? rulla->vcc->vpi : 0, | |
1609 | rulla->vcc ? rulla->vcc->vci : 0, | |
1610 | rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, | |
1611 | rulla->recv_vcc ? rulla->recv_vcc->vci : 0, | |
1612 | rulla->last_used, | |
1613 | rulla->timestamp, rulla->no_tries); | |
1614 | offset += sprintf(buf + offset, | |
1615 | "Flags:%x, Packets_flooded:%x, Status: %s ", | |
1616 | rulla->flags, rulla->packets_flooded, | |
1617 | get_status_string(rulla->status)); | |
1fa9961d CW |
1618 | printk("%s", buf); |
1619 | } | |
1620 | ||
d0732f64 | 1621 | if (!hlist_empty(&priv->mcast_fwds)) |
1fa9961d | 1622 | printk("Multicast Forward VCCs\n"); |
d0732f64 | 1623 | hlist_for_each_entry(rulla, node, &priv->mcast_fwds, next) { |
1fa9961d CW |
1624 | offset = 0; |
1625 | offset += sprintf(buf + offset, "Mac:"); | |
1626 | for (j = 0; j < ETH_ALEN; j++) { | |
1627 | offset += sprintf(buf + offset, "%2.2x ", | |
1628 | rulla->mac_addr[j] & 0xff); | |
1629 | } | |
1630 | offset += sprintf(buf + offset, "Atm:"); | |
1631 | for (j = 0; j < ATM_ESA_LEN; j++) { | |
1632 | offset += sprintf(buf + offset, "%2.2x ", | |
1633 | rulla->atm_addr[j] & 0xff); | |
1634 | } | |
1635 | offset += sprintf(buf + offset, | |
1636 | "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", | |
1637 | rulla->vcc ? rulla->vcc->vpi : 0, | |
1638 | rulla->vcc ? rulla->vcc->vci : 0, | |
1639 | rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, | |
1640 | rulla->recv_vcc ? rulla->recv_vcc->vci : 0, | |
1641 | rulla->last_used, | |
1642 | rulla->timestamp, rulla->no_tries); | |
1643 | offset += sprintf(buf + offset, | |
1644 | "Flags:%x, Packets_flooded:%x, Status: %s ", | |
1645 | rulla->flags, rulla->packets_flooded, | |
1646 | get_status_string(rulla->status)); | |
d0732f64 | 1647 | printk("%s\n", buf); |
1fa9961d | 1648 | } |
1da177e4 | 1649 | |
1da177e4 | 1650 | } |
d0732f64 CW |
1651 | #else |
1652 | #define dump_arp_table(priv) do { } while (0) | |
1653 | #endif | |
1da177e4 LT |
1654 | |
1655 | /* | |
1656 | * Destruction of arp-cache | |
1657 | */ | |
1fa9961d | 1658 | static void lec_arp_destroy(struct lec_priv *priv) |
1da177e4 LT |
1659 | { |
1660 | unsigned long flags; | |
d0732f64 CW |
1661 | struct hlist_node *node, *next; |
1662 | struct lec_arp_table *entry; | |
1fa9961d CW |
1663 | int i; |
1664 | ||
987e46bd | 1665 | cancel_rearming_delayed_work(&priv->lec_arp_work); |
1da177e4 | 1666 | |
1fa9961d CW |
1667 | /* |
1668 | * Remove all entries | |
1669 | */ | |
1da177e4 LT |
1670 | |
1671 | spin_lock_irqsave(&priv->lec_arp_lock, flags); | |
1fa9961d | 1672 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
d0732f64 | 1673 | hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) { |
1fa9961d | 1674 | lec_arp_remove(priv, entry); |
33a9c2d4 | 1675 | lec_arp_put(entry); |
1fa9961d | 1676 | } |
d0732f64 | 1677 | INIT_HLIST_HEAD(&priv->lec_arp_tables[i]); |
1fa9961d | 1678 | } |
d0732f64 CW |
1679 | |
1680 | hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) { | |
1fa9961d CW |
1681 | del_timer_sync(&entry->timer); |
1682 | lec_arp_clear_vccs(entry); | |
d0732f64 | 1683 | hlist_del(&entry->next); |
33a9c2d4 | 1684 | lec_arp_put(entry); |
1fa9961d | 1685 | } |
d0732f64 CW |
1686 | INIT_HLIST_HEAD(&priv->lec_arp_empty_ones); |
1687 | ||
1688 | hlist_for_each_entry_safe(entry, node, next, &priv->lec_no_forward, next) { | |
1fa9961d CW |
1689 | del_timer_sync(&entry->timer); |
1690 | lec_arp_clear_vccs(entry); | |
d0732f64 | 1691 | hlist_del(&entry->next); |
33a9c2d4 | 1692 | lec_arp_put(entry); |
1fa9961d | 1693 | } |
d0732f64 CW |
1694 | INIT_HLIST_HEAD(&priv->lec_no_forward); |
1695 | ||
1696 | hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) { | |
1fa9961d CW |
1697 | /* No timer, LANEv2 7.1.20 and 2.3.5.3 */ |
1698 | lec_arp_clear_vccs(entry); | |
d0732f64 | 1699 | hlist_del(&entry->next); |
33a9c2d4 | 1700 | lec_arp_put(entry); |
1fa9961d | 1701 | } |
d0732f64 | 1702 | INIT_HLIST_HEAD(&priv->mcast_fwds); |
1fa9961d | 1703 | priv->mcast_vcc = NULL; |
1da177e4 LT |
1704 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
1705 | } | |
1706 | ||
f7d57453 | 1707 | /* |
1da177e4 LT |
1708 | * Find entry by mac_address |
1709 | */ | |
1fa9961d | 1710 | static struct lec_arp_table *lec_arp_find(struct lec_priv *priv, |
61c33e01 | 1711 | const unsigned char *mac_addr) |
1da177e4 | 1712 | { |
d0732f64 CW |
1713 | struct hlist_node *node; |
1714 | struct hlist_head *head; | |
1715 | struct lec_arp_table *entry; | |
1fa9961d | 1716 | |
52240062 | 1717 | pr_debug("LEC_ARP: lec_arp_find :%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n", |
1fa9961d CW |
1718 | mac_addr[0] & 0xff, mac_addr[1] & 0xff, mac_addr[2] & 0xff, |
1719 | mac_addr[3] & 0xff, mac_addr[4] & 0xff, mac_addr[5] & 0xff); | |
1fa9961d | 1720 | |
d0732f64 CW |
1721 | head = &priv->lec_arp_tables[HASH(mac_addr[ETH_ALEN - 1])]; |
1722 | hlist_for_each_entry(entry, node, head, next) { | |
1723 | if (!compare_ether_addr(mac_addr, entry->mac_addr)) { | |
1724 | return entry; | |
1fa9961d | 1725 | } |
1fa9961d CW |
1726 | } |
1727 | return NULL; | |
1da177e4 LT |
1728 | } |
1729 | ||
1fa9961d | 1730 | static struct lec_arp_table *make_entry(struct lec_priv *priv, |
61c33e01 | 1731 | const unsigned char *mac_addr) |
1da177e4 | 1732 | { |
1fa9961d CW |
1733 | struct lec_arp_table *to_return; |
1734 | ||
1735 | to_return = kzalloc(sizeof(struct lec_arp_table), GFP_ATOMIC); | |
1736 | if (!to_return) { | |
1737 | printk("LEC: Arp entry kmalloc failed\n"); | |
1738 | return NULL; | |
1739 | } | |
1740 | memcpy(to_return->mac_addr, mac_addr, ETH_ALEN); | |
d0732f64 | 1741 | INIT_HLIST_NODE(&to_return->next); |
b24b8a24 PE |
1742 | setup_timer(&to_return->timer, lec_arp_expire_arp, |
1743 | (unsigned long)to_return); | |
1fa9961d CW |
1744 | to_return->last_used = jiffies; |
1745 | to_return->priv = priv; | |
1746 | skb_queue_head_init(&to_return->tx_wait); | |
33a9c2d4 | 1747 | atomic_set(&to_return->usage, 1); |
1fa9961d | 1748 | return to_return; |
1da177e4 LT |
1749 | } |
1750 | ||
1fa9961d CW |
1751 | /* Arp sent timer expired */ |
1752 | static void lec_arp_expire_arp(unsigned long data) | |
1da177e4 | 1753 | { |
1fa9961d CW |
1754 | struct lec_arp_table *entry; |
1755 | ||
1756 | entry = (struct lec_arp_table *)data; | |
1757 | ||
52240062 | 1758 | pr_debug("lec_arp_expire_arp\n"); |
1fa9961d CW |
1759 | if (entry->status == ESI_ARP_PENDING) { |
1760 | if (entry->no_tries <= entry->priv->max_retry_count) { | |
1761 | if (entry->is_rdesc) | |
1762 | send_to_lecd(entry->priv, l_rdesc_arp_xmt, | |
1763 | entry->mac_addr, NULL, NULL); | |
1764 | else | |
1765 | send_to_lecd(entry->priv, l_arp_xmt, | |
1766 | entry->mac_addr, NULL, NULL); | |
1767 | entry->no_tries++; | |
1768 | } | |
1769 | mod_timer(&entry->timer, jiffies + (1 * HZ)); | |
1770 | } | |
1da177e4 LT |
1771 | } |
1772 | ||
1fa9961d CW |
1773 | /* Unknown/unused vcc expire, remove associated entry */ |
1774 | static void lec_arp_expire_vcc(unsigned long data) | |
1da177e4 LT |
1775 | { |
1776 | unsigned long flags; | |
1fa9961d CW |
1777 | struct lec_arp_table *to_remove = (struct lec_arp_table *)data; |
1778 | struct lec_priv *priv = (struct lec_priv *)to_remove->priv; | |
1da177e4 | 1779 | |
1fa9961d | 1780 | del_timer(&to_remove->timer); |
1da177e4 | 1781 | |
52240062 | 1782 | pr_debug("LEC_ARP %p %p: lec_arp_expire_vcc vpi:%d vci:%d\n", |
1fa9961d CW |
1783 | to_remove, priv, |
1784 | to_remove->vcc ? to_remove->recv_vcc->vpi : 0, | |
1785 | to_remove->vcc ? to_remove->recv_vcc->vci : 0); | |
1da177e4 LT |
1786 | |
1787 | spin_lock_irqsave(&priv->lec_arp_lock, flags); | |
d0732f64 | 1788 | hlist_del(&to_remove->next); |
1da177e4 LT |
1789 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
1790 | ||
1fa9961d | 1791 | lec_arp_clear_vccs(to_remove); |
33a9c2d4 | 1792 | lec_arp_put(to_remove); |
1da177e4 LT |
1793 | } |
1794 | ||
1795 | /* | |
1796 | * Expire entries. | |
1797 | * 1. Re-set timer | |
1798 | * 2. For each entry, delete entries that have aged past the age limit. | |
1799 | * 3. For each entry, depending on the status of the entry, perform | |
1800 | * the following maintenance. | |
1801 | * a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the | |
1802 | * tick_count is above the max_unknown_frame_time, clear | |
1803 | * the tick_count to zero and clear the packets_flooded counter | |
1804 | * to zero. This supports the packet rate limit per address | |
1805 | * while flooding unknowns. | |
1806 | * b. If the status is ESI_FLUSH_PENDING and the tick_count is greater | |
1807 | * than or equal to the path_switching_delay, change the status | |
1808 | * to ESI_FORWARD_DIRECT. This causes the flush period to end | |
1809 | * regardless of the progress of the flush protocol. | |
1810 | */ | |
c4028958 | 1811 | static void lec_arp_check_expire(struct work_struct *work) |
1da177e4 LT |
1812 | { |
1813 | unsigned long flags; | |
c4028958 DH |
1814 | struct lec_priv *priv = |
1815 | container_of(work, struct lec_priv, lec_arp_work.work); | |
d0732f64 CW |
1816 | struct hlist_node *node, *next; |
1817 | struct lec_arp_table *entry; | |
1fa9961d CW |
1818 | unsigned long now; |
1819 | unsigned long time_to_check; | |
1820 | int i; | |
1821 | ||
52240062 | 1822 | pr_debug("lec_arp_check_expire %p\n", priv); |
1da177e4 | 1823 | now = jiffies; |
6656e3c4 | 1824 | restart: |
1da177e4 | 1825 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
1fa9961d | 1826 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
d0732f64 | 1827 | hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) { |
1fa9961d | 1828 | if ((entry->flags) & LEC_REMOTE_FLAG && |
1da177e4 LT |
1829 | priv->topology_change) |
1830 | time_to_check = priv->forward_delay_time; | |
1831 | else | |
1832 | time_to_check = priv->aging_time; | |
1833 | ||
52240062 | 1834 | pr_debug("About to expire: %lx - %lx > %lx\n", |
1fa9961d CW |
1835 | now, entry->last_used, time_to_check); |
1836 | if (time_after(now, entry->last_used + time_to_check) | |
1837 | && !(entry->flags & LEC_PERMANENT_FLAG) | |
1838 | && !(entry->mac_addr[0] & 0x01)) { /* LANE2: 7.1.20 */ | |
1da177e4 | 1839 | /* Remove entry */ |
52240062 | 1840 | pr_debug("LEC:Entry timed out\n"); |
1da177e4 | 1841 | lec_arp_remove(priv, entry); |
33a9c2d4 | 1842 | lec_arp_put(entry); |
1da177e4 LT |
1843 | } else { |
1844 | /* Something else */ | |
1845 | if ((entry->status == ESI_VC_PENDING || | |
1fa9961d | 1846 | entry->status == ESI_ARP_PENDING) |
1da177e4 | 1847 | && time_after_eq(now, |
1fa9961d CW |
1848 | entry->timestamp + |
1849 | priv-> | |
1850 | max_unknown_frame_time)) { | |
1da177e4 LT |
1851 | entry->timestamp = jiffies; |
1852 | entry->packets_flooded = 0; | |
1853 | if (entry->status == ESI_VC_PENDING) | |
1fa9961d CW |
1854 | send_to_lecd(priv, l_svc_setup, |
1855 | entry->mac_addr, | |
1856 | entry->atm_addr, | |
1857 | NULL); | |
1da177e4 | 1858 | } |
1fa9961d CW |
1859 | if (entry->status == ESI_FLUSH_PENDING |
1860 | && | |
1861 | time_after_eq(now, entry->timestamp + | |
1862 | priv->path_switching_delay)) { | |
1da177e4 | 1863 | struct sk_buff *skb; |
6656e3c4 | 1864 | struct atm_vcc *vcc = entry->vcc; |
1da177e4 | 1865 | |
6656e3c4 CW |
1866 | lec_arp_hold(entry); |
1867 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); | |
1868 | while ((skb = skb_dequeue(&entry->tx_wait)) != NULL) | |
162619e5 | 1869 | lec_send(vcc, skb); |
1da177e4 | 1870 | entry->last_used = jiffies; |
1fa9961d | 1871 | entry->status = ESI_FORWARD_DIRECT; |
6656e3c4 CW |
1872 | lec_arp_put(entry); |
1873 | goto restart; | |
1da177e4 | 1874 | } |
1da177e4 LT |
1875 | } |
1876 | } | |
1877 | } | |
1878 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); | |
1879 | ||
987e46bd | 1880 | schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL); |
1da177e4 | 1881 | } |
1fa9961d | 1882 | |
1da177e4 LT |
1883 | /* |
1884 | * Try to find vcc where mac_address is attached. | |
f7d57453 | 1885 | * |
1da177e4 | 1886 | */ |
1fa9961d | 1887 | static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv, |
61c33e01 | 1888 | const unsigned char *mac_to_find, int is_rdesc, |
1fa9961d | 1889 | struct lec_arp_table **ret_entry) |
1da177e4 LT |
1890 | { |
1891 | unsigned long flags; | |
1fa9961d | 1892 | struct lec_arp_table *entry; |
1da177e4 LT |
1893 | struct atm_vcc *found; |
1894 | ||
1fa9961d CW |
1895 | if (mac_to_find[0] & 0x01) { |
1896 | switch (priv->lane_version) { | |
1897 | case 1: | |
1898 | return priv->mcast_vcc; | |
1fa9961d CW |
1899 | case 2: /* LANE2 wants arp for multicast addresses */ |
1900 | if (!compare_ether_addr(mac_to_find, bus_mac)) | |
1901 | return priv->mcast_vcc; | |
1902 | break; | |
1903 | default: | |
1904 | break; | |
1905 | } | |
1906 | } | |
1da177e4 LT |
1907 | |
1908 | spin_lock_irqsave(&priv->lec_arp_lock, flags); | |
1fa9961d CW |
1909 | entry = lec_arp_find(priv, mac_to_find); |
1910 | ||
1911 | if (entry) { | |
1912 | if (entry->status == ESI_FORWARD_DIRECT) { | |
1913 | /* Connection Ok */ | |
1914 | entry->last_used = jiffies; | |
6656e3c4 | 1915 | lec_arp_hold(entry); |
1fa9961d CW |
1916 | *ret_entry = entry; |
1917 | found = entry->vcc; | |
1da177e4 | 1918 | goto out; |
1fa9961d CW |
1919 | } |
1920 | /* | |
1921 | * If the LE_ARP cache entry is still pending, reset count to 0 | |
75b895c1 ST |
1922 | * so another LE_ARP request can be made for this frame. |
1923 | */ | |
1924 | if (entry->status == ESI_ARP_PENDING) { | |
1925 | entry->no_tries = 0; | |
1926 | } | |
1fa9961d CW |
1927 | /* |
1928 | * Data direct VC not yet set up, check to see if the unknown | |
1929 | * frame count is greater than the limit. If the limit has | |
1930 | * not been reached, allow the caller to send packet to | |
1931 | * BUS. | |
1932 | */ | |
1933 | if (entry->status != ESI_FLUSH_PENDING && | |
1934 | entry->packets_flooded < | |
1935 | priv->maximum_unknown_frame_count) { | |
1936 | entry->packets_flooded++; | |
52240062 | 1937 | pr_debug("LEC_ARP: Flooding..\n"); |
1fa9961d | 1938 | found = priv->mcast_vcc; |
1da177e4 | 1939 | goto out; |
1fa9961d CW |
1940 | } |
1941 | /* | |
1942 | * We got here because entry->status == ESI_FLUSH_PENDING | |
1da177e4 LT |
1943 | * or BUS flood limit was reached for an entry which is |
1944 | * in ESI_ARP_PENDING or ESI_VC_PENDING state. | |
1945 | */ | |
6656e3c4 | 1946 | lec_arp_hold(entry); |
1fa9961d | 1947 | *ret_entry = entry; |
52240062 | 1948 | pr_debug("lec: entry->status %d entry->vcc %p\n", entry->status, |
1fa9961d CW |
1949 | entry->vcc); |
1950 | found = NULL; | |
1951 | } else { | |
1952 | /* No matching entry was found */ | |
1953 | entry = make_entry(priv, mac_to_find); | |
52240062 | 1954 | pr_debug("LEC_ARP: Making entry\n"); |
1fa9961d CW |
1955 | if (!entry) { |
1956 | found = priv->mcast_vcc; | |
1da177e4 | 1957 | goto out; |
1fa9961d CW |
1958 | } |
1959 | lec_arp_add(priv, entry); | |
1960 | /* We want arp-request(s) to be sent */ | |
1961 | entry->packets_flooded = 1; | |
1962 | entry->status = ESI_ARP_PENDING; | |
1963 | entry->no_tries = 1; | |
1964 | entry->last_used = entry->timestamp = jiffies; | |
1965 | entry->is_rdesc = is_rdesc; | |
1966 | if (entry->is_rdesc) | |
1967 | send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL, | |
1968 | NULL); | |
1969 | else | |
1970 | send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL); | |
1971 | entry->timer.expires = jiffies + (1 * HZ); | |
1972 | entry->timer.function = lec_arp_expire_arp; | |
1973 | add_timer(&entry->timer); | |
1974 | found = priv->mcast_vcc; | |
1975 | } | |
1da177e4 LT |
1976 | |
1977 | out: | |
1978 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); | |
1979 | return found; | |
1980 | } | |
1981 | ||
1982 | static int | |
61c33e01 | 1983 | lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr, |
1fa9961d | 1984 | unsigned long permanent) |
1da177e4 LT |
1985 | { |
1986 | unsigned long flags; | |
d0732f64 CW |
1987 | struct hlist_node *node, *next; |
1988 | struct lec_arp_table *entry; | |
1fa9961d | 1989 | int i; |
1da177e4 | 1990 | |
52240062 | 1991 | pr_debug("lec_addr_delete\n"); |
1da177e4 | 1992 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
1fa9961d | 1993 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
d0732f64 | 1994 | hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) { |
1fa9961d CW |
1995 | if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN) |
1996 | && (permanent || | |
1997 | !(entry->flags & LEC_PERMANENT_FLAG))) { | |
1da177e4 | 1998 | lec_arp_remove(priv, entry); |
33a9c2d4 | 1999 | lec_arp_put(entry); |
1fa9961d | 2000 | } |
1da177e4 | 2001 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
1fa9961d CW |
2002 | return 0; |
2003 | } | |
2004 | } | |
1da177e4 | 2005 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
1fa9961d | 2006 | return -1; |
1da177e4 LT |
2007 | } |
2008 | ||
2009 | /* | |
f7d57453 | 2010 | * Notifies: Response to arp_request (atm_addr != NULL) |
1da177e4 LT |
2011 | */ |
2012 | static void | |
61c33e01 MBJ |
2013 | lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr, |
2014 | const unsigned char *atm_addr, unsigned long remoteflag, | |
1fa9961d | 2015 | unsigned int targetless_le_arp) |
1da177e4 LT |
2016 | { |
2017 | unsigned long flags; | |
d0732f64 | 2018 | struct hlist_node *node, *next; |
1fa9961d CW |
2019 | struct lec_arp_table *entry, *tmp; |
2020 | int i; | |
1da177e4 | 2021 | |
52240062 SH |
2022 | pr_debug("lec:%s", (targetless_le_arp) ? "targetless " : " "); |
2023 | pr_debug("lec_arp_update mac:%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n", | |
1fa9961d CW |
2024 | mac_addr[0], mac_addr[1], mac_addr[2], mac_addr[3], |
2025 | mac_addr[4], mac_addr[5]); | |
1da177e4 LT |
2026 | |
2027 | spin_lock_irqsave(&priv->lec_arp_lock, flags); | |
1fa9961d CW |
2028 | entry = lec_arp_find(priv, mac_addr); |
2029 | if (entry == NULL && targetless_le_arp) | |
2030 | goto out; /* | |
2031 | * LANE2: ignore targetless LE_ARPs for which | |
2032 | * we have no entry in the cache. 7.1.30 | |
2033 | */ | |
d0732f64 CW |
2034 | if (!hlist_empty(&priv->lec_arp_empty_ones)) { |
2035 | hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) { | |
2036 | if (memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN) == 0) { | |
2037 | hlist_del(&entry->next); | |
1fa9961d | 2038 | del_timer(&entry->timer); |
d0732f64 CW |
2039 | tmp = lec_arp_find(priv, mac_addr); |
2040 | if (tmp) { | |
2041 | del_timer(&tmp->timer); | |
2042 | tmp->status = ESI_FORWARD_DIRECT; | |
2043 | memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN); | |
2044 | tmp->vcc = entry->vcc; | |
2045 | tmp->old_push = entry->old_push; | |
2046 | tmp->last_used = jiffies; | |
2047 | del_timer(&entry->timer); | |
33a9c2d4 | 2048 | lec_arp_put(entry); |
d0732f64 CW |
2049 | entry = tmp; |
2050 | } else { | |
2051 | entry->status = ESI_FORWARD_DIRECT; | |
2052 | memcpy(entry->mac_addr, mac_addr, ETH_ALEN); | |
2053 | entry->last_used = jiffies; | |
2054 | lec_arp_add(priv, entry); | |
2055 | } | |
2056 | if (remoteflag) | |
2057 | entry->flags |= LEC_REMOTE_FLAG; | |
2058 | else | |
2059 | entry->flags &= ~LEC_REMOTE_FLAG; | |
52240062 | 2060 | pr_debug("After update\n"); |
d0732f64 CW |
2061 | dump_arp_table(priv); |
2062 | goto out; | |
1fa9961d | 2063 | } |
1fa9961d CW |
2064 | } |
2065 | } | |
d0732f64 | 2066 | |
1fa9961d CW |
2067 | entry = lec_arp_find(priv, mac_addr); |
2068 | if (!entry) { | |
2069 | entry = make_entry(priv, mac_addr); | |
2070 | if (!entry) | |
2071 | goto out; | |
2072 | entry->status = ESI_UNKNOWN; | |
2073 | lec_arp_add(priv, entry); | |
2074 | /* Temporary, changes before end of function */ | |
2075 | } | |
2076 | memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN); | |
2077 | del_timer(&entry->timer); | |
2078 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { | |
d0732f64 | 2079 | hlist_for_each_entry(tmp, node, &priv->lec_arp_tables[i], next) { |
1fa9961d CW |
2080 | if (entry != tmp && |
2081 | !memcmp(tmp->atm_addr, atm_addr, ATM_ESA_LEN)) { | |
2082 | /* Vcc to this host exists */ | |
2083 | if (tmp->status > ESI_VC_PENDING) { | |
2084 | /* | |
2085 | * ESI_FLUSH_PENDING, | |
2086 | * ESI_FORWARD_DIRECT | |
2087 | */ | |
2088 | entry->vcc = tmp->vcc; | |
2089 | entry->old_push = tmp->old_push; | |
2090 | } | |
2091 | entry->status = tmp->status; | |
2092 | break; | |
2093 | } | |
2094 | } | |
2095 | } | |
2096 | if (remoteflag) | |
2097 | entry->flags |= LEC_REMOTE_FLAG; | |
2098 | else | |
2099 | entry->flags &= ~LEC_REMOTE_FLAG; | |
2100 | if (entry->status == ESI_ARP_PENDING || entry->status == ESI_UNKNOWN) { | |
2101 | entry->status = ESI_VC_PENDING; | |
d0732f64 | 2102 | send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL); |
1fa9961d | 2103 | } |
52240062 | 2104 | pr_debug("After update2\n"); |
1fa9961d | 2105 | dump_arp_table(priv); |
1da177e4 LT |
2106 | out: |
2107 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); | |
2108 | } | |
2109 | ||
2110 | /* | |
f7d57453 | 2111 | * Notifies: Vcc setup ready |
1da177e4 LT |
2112 | */ |
2113 | static void | |
61c33e01 | 2114 | lec_vcc_added(struct lec_priv *priv, const struct atmlec_ioc *ioc_data, |
1fa9961d CW |
2115 | struct atm_vcc *vcc, |
2116 | void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb)) | |
1da177e4 LT |
2117 | { |
2118 | unsigned long flags; | |
d0732f64 | 2119 | struct hlist_node *node; |
1fa9961d CW |
2120 | struct lec_arp_table *entry; |
2121 | int i, found_entry = 0; | |
1da177e4 LT |
2122 | |
2123 | spin_lock_irqsave(&priv->lec_arp_lock, flags); | |
1fa9961d CW |
2124 | if (ioc_data->receive == 2) { |
2125 | /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */ | |
1da177e4 | 2126 | |
52240062 | 2127 | pr_debug("LEC_ARP: Attaching mcast forward\n"); |
1da177e4 | 2128 | #if 0 |
1fa9961d CW |
2129 | entry = lec_arp_find(priv, bus_mac); |
2130 | if (!entry) { | |
2131 | printk("LEC_ARP: Multicast entry not found!\n"); | |
1da177e4 | 2132 | goto out; |
1fa9961d CW |
2133 | } |
2134 | memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); | |
2135 | entry->recv_vcc = vcc; | |
2136 | entry->old_recv_push = old_push; | |
1da177e4 | 2137 | #endif |
1fa9961d CW |
2138 | entry = make_entry(priv, bus_mac); |
2139 | if (entry == NULL) | |
1da177e4 | 2140 | goto out; |
1fa9961d CW |
2141 | del_timer(&entry->timer); |
2142 | memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); | |
2143 | entry->recv_vcc = vcc; | |
2144 | entry->old_recv_push = old_push; | |
d0732f64 | 2145 | hlist_add_head(&entry->next, &priv->mcast_fwds); |
1fa9961d CW |
2146 | goto out; |
2147 | } else if (ioc_data->receive == 1) { | |
2148 | /* | |
2149 | * Vcc which we don't want to make default vcc, | |
2150 | * attach it anyway. | |
2151 | */ | |
52240062 | 2152 | pr_debug |
1fa9961d CW |
2153 | ("LEC_ARP:Attaching data direct, not default: " |
2154 | "%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", | |
2155 | ioc_data->atm_addr[0], ioc_data->atm_addr[1], | |
2156 | ioc_data->atm_addr[2], ioc_data->atm_addr[3], | |
2157 | ioc_data->atm_addr[4], ioc_data->atm_addr[5], | |
2158 | ioc_data->atm_addr[6], ioc_data->atm_addr[7], | |
2159 | ioc_data->atm_addr[8], ioc_data->atm_addr[9], | |
2160 | ioc_data->atm_addr[10], ioc_data->atm_addr[11], | |
2161 | ioc_data->atm_addr[12], ioc_data->atm_addr[13], | |
2162 | ioc_data->atm_addr[14], ioc_data->atm_addr[15], | |
2163 | ioc_data->atm_addr[16], ioc_data->atm_addr[17], | |
2164 | ioc_data->atm_addr[18], ioc_data->atm_addr[19]); | |
2165 | entry = make_entry(priv, bus_mac); | |
2166 | if (entry == NULL) | |
1da177e4 | 2167 | goto out; |
1fa9961d CW |
2168 | memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); |
2169 | memset(entry->mac_addr, 0, ETH_ALEN); | |
2170 | entry->recv_vcc = vcc; | |
2171 | entry->old_recv_push = old_push; | |
2172 | entry->status = ESI_UNKNOWN; | |
2173 | entry->timer.expires = jiffies + priv->vcc_timeout_period; | |
2174 | entry->timer.function = lec_arp_expire_vcc; | |
d0732f64 | 2175 | hlist_add_head(&entry->next, &priv->lec_no_forward); |
1fa9961d | 2176 | add_timer(&entry->timer); |
1da177e4 LT |
2177 | dump_arp_table(priv); |
2178 | goto out; | |
1fa9961d | 2179 | } |
52240062 | 2180 | pr_debug |
1fa9961d CW |
2181 | ("LEC_ARP:Attaching data direct, default: " |
2182 | "%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", | |
2183 | ioc_data->atm_addr[0], ioc_data->atm_addr[1], | |
2184 | ioc_data->atm_addr[2], ioc_data->atm_addr[3], | |
2185 | ioc_data->atm_addr[4], ioc_data->atm_addr[5], | |
2186 | ioc_data->atm_addr[6], ioc_data->atm_addr[7], | |
2187 | ioc_data->atm_addr[8], ioc_data->atm_addr[9], | |
2188 | ioc_data->atm_addr[10], ioc_data->atm_addr[11], | |
2189 | ioc_data->atm_addr[12], ioc_data->atm_addr[13], | |
2190 | ioc_data->atm_addr[14], ioc_data->atm_addr[15], | |
2191 | ioc_data->atm_addr[16], ioc_data->atm_addr[17], | |
2192 | ioc_data->atm_addr[18], ioc_data->atm_addr[19]); | |
2193 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { | |
d0732f64 | 2194 | hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) { |
1fa9961d CW |
2195 | if (memcmp |
2196 | (ioc_data->atm_addr, entry->atm_addr, | |
2197 | ATM_ESA_LEN) == 0) { | |
52240062 SH |
2198 | pr_debug("LEC_ARP: Attaching data direct\n"); |
2199 | pr_debug("Currently -> Vcc: %d, Rvcc:%d\n", | |
1fa9961d CW |
2200 | entry->vcc ? entry->vcc->vci : 0, |
2201 | entry->recv_vcc ? entry->recv_vcc-> | |
2202 | vci : 0); | |
2203 | found_entry = 1; | |
2204 | del_timer(&entry->timer); | |
2205 | entry->vcc = vcc; | |
2206 | entry->old_push = old_push; | |
2207 | if (entry->status == ESI_VC_PENDING) { | |
2208 | if (priv->maximum_unknown_frame_count | |
2209 | == 0) | |
2210 | entry->status = | |
2211 | ESI_FORWARD_DIRECT; | |
2212 | else { | |
2213 | entry->timestamp = jiffies; | |
2214 | entry->status = | |
2215 | ESI_FLUSH_PENDING; | |
1da177e4 | 2216 | #if 0 |
1fa9961d CW |
2217 | send_to_lecd(priv, l_flush_xmt, |
2218 | NULL, | |
2219 | entry->atm_addr, | |
2220 | NULL); | |
1da177e4 | 2221 | #endif |
1fa9961d CW |
2222 | } |
2223 | } else { | |
2224 | /* | |
2225 | * They were forming a connection | |
2226 | * to us, and we to them. Our | |
2227 | * ATM address is numerically lower | |
2228 | * than theirs, so we make connection | |
2229 | * we formed into default VCC (8.1.11). | |
2230 | * Connection they made gets torn | |
2231 | * down. This might confuse some | |
2232 | * clients. Can be changed if | |
2233 | * someone reports trouble... | |
2234 | */ | |
2235 | ; | |
2236 | } | |
2237 | } | |
2238 | } | |
2239 | } | |
2240 | if (found_entry) { | |
52240062 | 2241 | pr_debug("After vcc was added\n"); |
1fa9961d | 2242 | dump_arp_table(priv); |
1da177e4 | 2243 | goto out; |
1fa9961d CW |
2244 | } |
2245 | /* | |
2246 | * Not found, snatch address from first data packet that arrives | |
2247 | * from this vcc | |
2248 | */ | |
2249 | entry = make_entry(priv, bus_mac); | |
2250 | if (!entry) | |
1da177e4 | 2251 | goto out; |
1fa9961d CW |
2252 | entry->vcc = vcc; |
2253 | entry->old_push = old_push; | |
2254 | memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); | |
2255 | memset(entry->mac_addr, 0, ETH_ALEN); | |
2256 | entry->status = ESI_UNKNOWN; | |
d0732f64 | 2257 | hlist_add_head(&entry->next, &priv->lec_arp_empty_ones); |
1fa9961d CW |
2258 | entry->timer.expires = jiffies + priv->vcc_timeout_period; |
2259 | entry->timer.function = lec_arp_expire_vcc; | |
2260 | add_timer(&entry->timer); | |
52240062 | 2261 | pr_debug("After vcc was added\n"); |
1da177e4 LT |
2262 | dump_arp_table(priv); |
2263 | out: | |
2264 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); | |
2265 | } | |
2266 | ||
1fa9961d | 2267 | static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id) |
1da177e4 LT |
2268 | { |
2269 | unsigned long flags; | |
d0732f64 | 2270 | struct hlist_node *node; |
1fa9961d CW |
2271 | struct lec_arp_table *entry; |
2272 | int i; | |
1da177e4 | 2273 | |
52240062 | 2274 | pr_debug("LEC:lec_flush_complete %lx\n", tran_id); |
6656e3c4 | 2275 | restart: |
1fa9961d CW |
2276 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
2277 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { | |
d0732f64 | 2278 | hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) { |
1fa9961d CW |
2279 | if (entry->flush_tran_id == tran_id |
2280 | && entry->status == ESI_FLUSH_PENDING) { | |
2281 | struct sk_buff *skb; | |
6656e3c4 | 2282 | struct atm_vcc *vcc = entry->vcc; |
1fa9961d | 2283 | |
6656e3c4 CW |
2284 | lec_arp_hold(entry); |
2285 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); | |
2286 | while ((skb = skb_dequeue(&entry->tx_wait)) != NULL) | |
162619e5 | 2287 | lec_send(vcc, skb); |
6656e3c4 | 2288 | entry->last_used = jiffies; |
1fa9961d | 2289 | entry->status = ESI_FORWARD_DIRECT; |
6656e3c4 | 2290 | lec_arp_put(entry); |
52240062 | 2291 | pr_debug("LEC_ARP: Flushed\n"); |
6656e3c4 | 2292 | goto restart; |
1fa9961d CW |
2293 | } |
2294 | } | |
2295 | } | |
1da177e4 | 2296 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
1fa9961d | 2297 | dump_arp_table(priv); |
1da177e4 LT |
2298 | } |
2299 | ||
2300 | static void | |
2301 | lec_set_flush_tran_id(struct lec_priv *priv, | |
61c33e01 | 2302 | const unsigned char *atm_addr, unsigned long tran_id) |
1da177e4 LT |
2303 | { |
2304 | unsigned long flags; | |
d0732f64 | 2305 | struct hlist_node *node; |
1fa9961d CW |
2306 | struct lec_arp_table *entry; |
2307 | int i; | |
1da177e4 LT |
2308 | |
2309 | spin_lock_irqsave(&priv->lec_arp_lock, flags); | |
1fa9961d | 2310 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) |
d0732f64 | 2311 | hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) { |
1fa9961d CW |
2312 | if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) { |
2313 | entry->flush_tran_id = tran_id; | |
52240062 | 2314 | pr_debug("Set flush transaction id to %lx for %p\n", |
f7d57453 | 2315 | tran_id, entry); |
1fa9961d | 2316 | } |
d0732f64 | 2317 | } |
1da177e4 LT |
2318 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
2319 | } | |
2320 | ||
1fa9961d | 2321 | static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc) |
1da177e4 LT |
2322 | { |
2323 | unsigned long flags; | |
1fa9961d CW |
2324 | unsigned char mac_addr[] = { |
2325 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff | |
2326 | }; | |
2327 | struct lec_arp_table *to_add; | |
1da177e4 LT |
2328 | struct lec_vcc_priv *vpriv; |
2329 | int err = 0; | |
1fa9961d | 2330 | |
1da177e4 LT |
2331 | if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL))) |
2332 | return -ENOMEM; | |
2333 | vpriv->xoff = 0; | |
2334 | vpriv->old_pop = vcc->pop; | |
2335 | vcc->user_back = vpriv; | |
1fa9961d | 2336 | vcc->pop = lec_pop; |
1da177e4 | 2337 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
1fa9961d CW |
2338 | to_add = make_entry(priv, mac_addr); |
2339 | if (!to_add) { | |
1da177e4 LT |
2340 | vcc->pop = vpriv->old_pop; |
2341 | kfree(vpriv); | |
1fa9961d | 2342 | err = -ENOMEM; |
1da177e4 | 2343 | goto out; |
1fa9961d CW |
2344 | } |
2345 | memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN); | |
2346 | to_add->status = ESI_FORWARD_DIRECT; | |
2347 | to_add->flags |= LEC_PERMANENT_FLAG; | |
2348 | to_add->vcc = vcc; | |
2349 | to_add->old_push = vcc->push; | |
2350 | vcc->push = lec_push; | |
2351 | priv->mcast_vcc = vcc; | |
2352 | lec_arp_add(priv, to_add); | |
1da177e4 LT |
2353 | out: |
2354 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); | |
1fa9961d | 2355 | return err; |
1da177e4 LT |
2356 | } |
2357 | ||
1fa9961d | 2358 | static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc) |
1da177e4 LT |
2359 | { |
2360 | unsigned long flags; | |
d0732f64 CW |
2361 | struct hlist_node *node, *next; |
2362 | struct lec_arp_table *entry; | |
1fa9961d | 2363 | int i; |
1da177e4 | 2364 | |
52240062 | 2365 | pr_debug("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n", vcc->vpi, vcc->vci); |
1fa9961d | 2366 | dump_arp_table(priv); |
d0732f64 | 2367 | |
1da177e4 | 2368 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
d0732f64 | 2369 | |
1fa9961d | 2370 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
d0732f64 | 2371 | hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) { |
1fa9961d CW |
2372 | if (vcc == entry->vcc) { |
2373 | lec_arp_remove(priv, entry); | |
33a9c2d4 | 2374 | lec_arp_put(entry); |
1fa9961d CW |
2375 | if (priv->mcast_vcc == vcc) { |
2376 | priv->mcast_vcc = NULL; | |
2377 | } | |
2378 | } | |
2379 | } | |
2380 | } | |
2381 | ||
d0732f64 CW |
2382 | hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) { |
2383 | if (entry->vcc == vcc) { | |
1fa9961d CW |
2384 | lec_arp_clear_vccs(entry); |
2385 | del_timer(&entry->timer); | |
d0732f64 | 2386 | hlist_del(&entry->next); |
33a9c2d4 | 2387 | lec_arp_put(entry); |
1fa9961d | 2388 | } |
1fa9961d CW |
2389 | } |
2390 | ||
d0732f64 | 2391 | hlist_for_each_entry_safe(entry, node, next, &priv->lec_no_forward, next) { |
1fa9961d CW |
2392 | if (entry->recv_vcc == vcc) { |
2393 | lec_arp_clear_vccs(entry); | |
2394 | del_timer(&entry->timer); | |
d0732f64 | 2395 | hlist_del(&entry->next); |
33a9c2d4 | 2396 | lec_arp_put(entry); |
1fa9961d | 2397 | } |
1fa9961d CW |
2398 | } |
2399 | ||
d0732f64 | 2400 | hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) { |
1fa9961d CW |
2401 | if (entry->recv_vcc == vcc) { |
2402 | lec_arp_clear_vccs(entry); | |
2403 | /* No timer, LANEv2 7.1.20 and 2.3.5.3 */ | |
d0732f64 | 2404 | hlist_del(&entry->next); |
33a9c2d4 | 2405 | lec_arp_put(entry); |
1fa9961d | 2406 | } |
1fa9961d | 2407 | } |
1da177e4 LT |
2408 | |
2409 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); | |
2410 | dump_arp_table(priv); | |
2411 | } | |
2412 | ||
2413 | static void | |
2414 | lec_arp_check_empties(struct lec_priv *priv, | |
1fa9961d | 2415 | struct atm_vcc *vcc, struct sk_buff *skb) |
1da177e4 | 2416 | { |
1fa9961d | 2417 | unsigned long flags; |
d0732f64 CW |
2418 | struct hlist_node *node, *next; |
2419 | struct lec_arp_table *entry, *tmp; | |
1fa9961d CW |
2420 | struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data; |
2421 | unsigned char *src; | |
1da177e4 | 2422 | #ifdef CONFIG_TR |
1fa9961d | 2423 | struct lecdatahdr_8025 *tr_hdr = (struct lecdatahdr_8025 *)skb->data; |
1da177e4 | 2424 | |
1fa9961d CW |
2425 | if (priv->is_trdev) |
2426 | src = tr_hdr->h_source; | |
2427 | else | |
1da177e4 | 2428 | #endif |
1fa9961d | 2429 | src = hdr->h_source; |
1da177e4 LT |
2430 | |
2431 | spin_lock_irqsave(&priv->lec_arp_lock, flags); | |
d0732f64 CW |
2432 | hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) { |
2433 | if (vcc == entry->vcc) { | |
2434 | del_timer(&entry->timer); | |
2435 | memcpy(entry->mac_addr, src, ETH_ALEN); | |
2436 | entry->status = ESI_FORWARD_DIRECT; | |
2437 | entry->last_used = jiffies; | |
2438 | /* We might have got an entry */ | |
2439 | if ((tmp = lec_arp_find(priv, src))) { | |
2440 | lec_arp_remove(priv, tmp); | |
33a9c2d4 | 2441 | lec_arp_put(tmp); |
d0732f64 CW |
2442 | } |
2443 | hlist_del(&entry->next); | |
2444 | lec_arp_add(priv, entry); | |
2445 | goto out; | |
1fa9961d | 2446 | } |
1fa9961d | 2447 | } |
52240062 | 2448 | pr_debug("LEC_ARP: Arp_check_empties: entry not found!\n"); |
1da177e4 LT |
2449 | out: |
2450 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); | |
2451 | } | |
1fa9961d | 2452 | |
1da177e4 | 2453 | MODULE_LICENSE("GPL"); |