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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 | ||
99824461 JP |
7 | #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__ |
8 | ||
5a0e3ad6 | 9 | #include <linux/slab.h> |
1da177e4 LT |
10 | #include <linux/kernel.h> |
11 | #include <linux/bitops.h> | |
4fc268d2 | 12 | #include <linux/capability.h> |
1da177e4 LT |
13 | |
14 | /* We are ethernet device */ | |
15 | #include <linux/if_ether.h> | |
16 | #include <linux/netdevice.h> | |
17 | #include <linux/etherdevice.h> | |
18 | #include <net/sock.h> | |
19 | #include <linux/skbuff.h> | |
20 | #include <linux/ip.h> | |
21 | #include <asm/byteorder.h> | |
c48192a7 | 22 | #include <linux/uaccess.h> |
1da177e4 LT |
23 | #include <net/arp.h> |
24 | #include <net/dst.h> | |
25 | #include <linux/proc_fs.h> | |
26 | #include <linux/spinlock.h> | |
1da177e4 LT |
27 | #include <linux/seq_file.h> |
28 | ||
29 | /* TokenRing if needed */ | |
30 | #ifdef CONFIG_TR | |
31 | #include <linux/trdevice.h> | |
32 | #endif | |
33 | ||
34 | /* And atm device */ | |
35 | #include <linux/atmdev.h> | |
36 | #include <linux/atmlec.h> | |
37 | ||
38 | /* Proxy LEC knows about bridging */ | |
39 | #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) | |
1da177e4 LT |
40 | #include "../bridge/br_private.h" |
41 | ||
d44f7746 | 42 | static unsigned char bridge_ula_lec[] = { 0x01, 0x80, 0xc2, 0x00, 0x00 }; |
1da177e4 LT |
43 | #endif |
44 | ||
45 | /* Modular too */ | |
46 | #include <linux/module.h> | |
47 | #include <linux/init.h> | |
48 | ||
49 | #include "lec.h" | |
50 | #include "lec_arpc.h" | |
51 | #include "resources.h" | |
52 | ||
d44f7746 CW |
53 | #define DUMP_PACKETS 0 /* |
54 | * 0 = None, | |
55 | * 1 = 30 first bytes | |
56 | * 2 = Whole packet | |
57 | */ | |
1da177e4 | 58 | |
d44f7746 CW |
59 | #define LEC_UNRES_QUE_LEN 8 /* |
60 | * number of tx packets to queue for a | |
61 | * single destination while waiting for SVC | |
62 | */ | |
1da177e4 LT |
63 | |
64 | static int lec_open(struct net_device *dev); | |
3c805a22 SH |
65 | static netdev_tx_t lec_start_xmit(struct sk_buff *skb, |
66 | struct net_device *dev); | |
1da177e4 | 67 | static int lec_close(struct net_device *dev); |
d44f7746 | 68 | static struct lec_arp_table *lec_arp_find(struct lec_priv *priv, |
61c33e01 | 69 | const unsigned char *mac_addr); |
1da177e4 | 70 | static int lec_arp_remove(struct lec_priv *priv, |
d44f7746 | 71 | struct lec_arp_table *to_remove); |
1da177e4 | 72 | /* LANE2 functions */ |
61c33e01 MBJ |
73 | static void lane2_associate_ind(struct net_device *dev, const u8 *mac_address, |
74 | const u8 *tlvs, u32 sizeoftlvs); | |
75 | static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force, | |
d44f7746 | 76 | u8 **tlvs, u32 *sizeoftlvs); |
61c33e01 MBJ |
77 | static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst, |
78 | const u8 *tlvs, u32 sizeoftlvs); | |
1da177e4 | 79 | |
61c33e01 | 80 | static int lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr, |
1da177e4 LT |
81 | unsigned long permanent); |
82 | static void lec_arp_check_empties(struct lec_priv *priv, | |
83 | struct atm_vcc *vcc, struct sk_buff *skb); | |
84 | static void lec_arp_destroy(struct lec_priv *priv); | |
85 | static void lec_arp_init(struct lec_priv *priv); | |
d44f7746 | 86 | static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv, |
61c33e01 | 87 | const unsigned char *mac_to_find, |
1da177e4 LT |
88 | int is_rdesc, |
89 | struct lec_arp_table **ret_entry); | |
61c33e01 | 90 | static void lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr, |
c48192a7 JP |
91 | const unsigned char *atm_addr, |
92 | unsigned long remoteflag, | |
1da177e4 LT |
93 | unsigned int targetless_le_arp); |
94 | static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id); | |
95 | static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc); | |
96 | static void lec_set_flush_tran_id(struct lec_priv *priv, | |
61c33e01 | 97 | const unsigned char *atm_addr, |
1da177e4 | 98 | unsigned long tran_id); |
c48192a7 JP |
99 | static void lec_vcc_added(struct lec_priv *priv, |
100 | const struct atmlec_ioc *ioc_data, | |
1da177e4 | 101 | struct atm_vcc *vcc, |
c48192a7 JP |
102 | void (*old_push)(struct atm_vcc *vcc, |
103 | struct sk_buff *skb)); | |
1da177e4 LT |
104 | static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc); |
105 | ||
33a9c2d4 CW |
106 | /* must be done under lec_arp_lock */ |
107 | static inline void lec_arp_hold(struct lec_arp_table *entry) | |
108 | { | |
109 | atomic_inc(&entry->usage); | |
110 | } | |
111 | ||
112 | static inline void lec_arp_put(struct lec_arp_table *entry) | |
113 | { | |
114 | if (atomic_dec_and_test(&entry->usage)) | |
115 | kfree(entry); | |
116 | } | |
117 | ||
1da177e4 | 118 | static struct lane2_ops lane2_ops = { |
d44f7746 CW |
119 | lane2_resolve, /* resolve, spec 3.1.3 */ |
120 | lane2_associate_req, /* associate_req, spec 3.1.4 */ | |
121 | NULL /* associate indicator, spec 3.1.5 */ | |
1da177e4 LT |
122 | }; |
123 | ||
d44f7746 | 124 | static unsigned char bus_mac[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; |
1da177e4 LT |
125 | |
126 | /* Device structures */ | |
127 | static struct net_device *dev_lec[MAX_LEC_ITF]; | |
128 | ||
129 | #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) | |
130 | static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev) | |
131 | { | |
d44f7746 CW |
132 | struct ethhdr *eth; |
133 | char *buff; | |
134 | struct lec_priv *priv; | |
135 | ||
136 | /* | |
137 | * Check if this is a BPDU. If so, ask zeppelin to send | |
138 | * LE_TOPOLOGY_REQUEST with the same value of Topology Change bit | |
139 | * as the Config BPDU has | |
140 | */ | |
141 | eth = (struct ethhdr *)skb->data; | |
142 | buff = skb->data + skb->dev->hard_header_len; | |
143 | if (*buff++ == 0x42 && *buff++ == 0x42 && *buff++ == 0x03) { | |
1da177e4 | 144 | struct sock *sk; |
d44f7746 CW |
145 | struct sk_buff *skb2; |
146 | struct atmlec_msg *mesg; | |
147 | ||
148 | skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC); | |
149 | if (skb2 == NULL) | |
150 | return; | |
151 | skb2->len = sizeof(struct atmlec_msg); | |
152 | mesg = (struct atmlec_msg *)skb2->data; | |
153 | mesg->type = l_topology_change; | |
154 | buff += 4; | |
c48192a7 JP |
155 | mesg->content.normal.flag = *buff & 0x01; |
156 | /* 0x01 is topology change */ | |
d44f7746 | 157 | |
524ad0a7 | 158 | priv = netdev_priv(dev); |
d44f7746 | 159 | atm_force_charge(priv->lecd, skb2->truesize); |
1da177e4 | 160 | sk = sk_atm(priv->lecd); |
d44f7746 CW |
161 | skb_queue_tail(&sk->sk_receive_queue, skb2); |
162 | sk->sk_data_ready(sk, skb2->len); | |
163 | } | |
1da177e4 LT |
164 | } |
165 | #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */ | |
166 | ||
167 | /* | |
168 | * Modelled after tr_type_trans | |
169 | * All multicast and ARE or STE frames go to BUS. | |
170 | * Non source routed frames go by destination address. | |
171 | * Last hop source routed frames go by destination address. | |
172 | * Not last hop source routed frames go by _next_ route descriptor. | |
173 | * Returns pointer to destination MAC address or fills in rdesc | |
174 | * and returns NULL. | |
175 | */ | |
176 | #ifdef CONFIG_TR | |
177 | static unsigned char *get_tr_dst(unsigned char *packet, unsigned char *rdesc) | |
178 | { | |
d44f7746 | 179 | struct trh_hdr *trh; |
5c17d5f1 | 180 | unsigned int riflen, num_rdsc; |
d44f7746 CW |
181 | |
182 | trh = (struct trh_hdr *)packet; | |
183 | if (trh->daddr[0] & (uint8_t) 0x80) | |
184 | return bus_mac; /* multicast */ | |
185 | ||
186 | if (trh->saddr[0] & TR_RII) { | |
187 | riflen = (ntohs(trh->rcf) & TR_RCF_LEN_MASK) >> 8; | |
188 | if ((ntohs(trh->rcf) >> 13) != 0) | |
189 | return bus_mac; /* ARE or STE */ | |
190 | } else | |
191 | return trh->daddr; /* not source routed */ | |
192 | ||
193 | if (riflen < 6) | |
194 | return trh->daddr; /* last hop, source routed */ | |
195 | ||
196 | /* riflen is 6 or more, packet has more than one route descriptor */ | |
197 | num_rdsc = (riflen / 2) - 1; | |
198 | memset(rdesc, 0, ETH_ALEN); | |
199 | /* offset 4 comes from LAN destination field in LE control frames */ | |
200 | if (trh->rcf & htons((uint16_t) TR_RCF_DIR_BIT)) | |
30d492da | 201 | memcpy(&rdesc[4], &trh->rseg[num_rdsc - 2], sizeof(__be16)); |
d44f7746 | 202 | else { |
30d492da | 203 | memcpy(&rdesc[4], &trh->rseg[1], sizeof(__be16)); |
d44f7746 CW |
204 | rdesc[5] = ((ntohs(trh->rseg[0]) & 0x000f) | (rdesc[5] & 0xf0)); |
205 | } | |
206 | ||
207 | return NULL; | |
1da177e4 LT |
208 | } |
209 | #endif /* CONFIG_TR */ | |
210 | ||
211 | /* | |
212 | * Open/initialize the netdevice. This is called (in the current kernel) | |
213 | * sometime after booting when the 'ifconfig' program is run. | |
214 | * | |
215 | * This routine should set everything up anew at each open, even | |
216 | * registers that "should" only need to be set once at boot, so that | |
217 | * there is non-reboot way to recover if something goes wrong. | |
218 | */ | |
219 | ||
d44f7746 | 220 | static int lec_open(struct net_device *dev) |
1da177e4 | 221 | { |
1da177e4 | 222 | netif_start_queue(dev); |
d44f7746 CW |
223 | |
224 | return 0; | |
1da177e4 LT |
225 | } |
226 | ||
162619e5 SH |
227 | static void |
228 | lec_send(struct atm_vcc *vcc, struct sk_buff *skb) | |
1da177e4 | 229 | { |
162619e5 SH |
230 | struct net_device *dev = skb->dev; |
231 | ||
1da177e4 LT |
232 | ATM_SKB(skb)->vcc = vcc; |
233 | ATM_SKB(skb)->atm_options = vcc->atm_options; | |
234 | ||
235 | atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); | |
236 | if (vcc->send(vcc, skb) < 0) { | |
162619e5 | 237 | dev->stats.tx_dropped++; |
1da177e4 LT |
238 | return; |
239 | } | |
240 | ||
162619e5 SH |
241 | dev->stats.tx_packets++; |
242 | dev->stats.tx_bytes += skb->len; | |
1da177e4 LT |
243 | } |
244 | ||
d44f7746 | 245 | static void lec_tx_timeout(struct net_device *dev) |
1da177e4 | 246 | { |
99824461 | 247 | pr_info("%s\n", dev->name); |
1da177e4 LT |
248 | dev->trans_start = jiffies; |
249 | netif_wake_queue(dev); | |
250 | } | |
251 | ||
3c805a22 SH |
252 | static netdev_tx_t lec_start_xmit(struct sk_buff *skb, |
253 | struct net_device *dev) | |
1da177e4 | 254 | { |
d44f7746 | 255 | struct sk_buff *skb2; |
524ad0a7 | 256 | struct lec_priv *priv = netdev_priv(dev); |
d44f7746 CW |
257 | struct lecdatahdr_8023 *lec_h; |
258 | struct atm_vcc *vcc; | |
1da177e4 | 259 | struct lec_arp_table *entry; |
d44f7746 | 260 | unsigned char *dst; |
1da177e4 LT |
261 | int min_frame_size; |
262 | #ifdef CONFIG_TR | |
d44f7746 | 263 | unsigned char rdesc[ETH_ALEN]; /* Token Ring route descriptor */ |
1da177e4 | 264 | #endif |
d44f7746 | 265 | int is_rdesc; |
d44f7746 | 266 | |
99824461 | 267 | pr_debug("called\n"); |
d44f7746 | 268 | if (!priv->lecd) { |
c48192a7 | 269 | pr_info("%s:No lecd attached\n", dev->name); |
162619e5 | 270 | dev->stats.tx_errors++; |
d44f7746 | 271 | netif_stop_queue(dev); |
81fbbf60 PM |
272 | kfree_skb(skb); |
273 | return NETDEV_TX_OK; | |
d44f7746 CW |
274 | } |
275 | ||
52240062 | 276 | pr_debug("skbuff head:%lx data:%lx tail:%lx end:%lx\n", |
99824461 JP |
277 | (long)skb->head, (long)skb->data, (long)skb_tail_pointer(skb), |
278 | (long)skb_end_pointer(skb)); | |
1da177e4 | 279 | #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) |
d44f7746 CW |
280 | if (memcmp(skb->data, bridge_ula_lec, sizeof(bridge_ula_lec)) == 0) |
281 | lec_handle_bridge(skb, dev); | |
1da177e4 LT |
282 | #endif |
283 | ||
d44f7746 CW |
284 | /* Make sure we have room for lec_id */ |
285 | if (skb_headroom(skb) < 2) { | |
99824461 | 286 | pr_debug("reallocating skb\n"); |
d44f7746 CW |
287 | skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN); |
288 | kfree_skb(skb); | |
289 | if (skb2 == NULL) | |
6ed10654 | 290 | return NETDEV_TX_OK; |
d44f7746 CW |
291 | skb = skb2; |
292 | } | |
293 | skb_push(skb, 2); | |
1da177e4 | 294 | |
d44f7746 CW |
295 | /* Put le header to place, works for TokenRing too */ |
296 | lec_h = (struct lecdatahdr_8023 *)skb->data; | |
297 | lec_h->le_header = htons(priv->lecid); | |
1da177e4 LT |
298 | |
299 | #ifdef CONFIG_TR | |
d44f7746 CW |
300 | /* |
301 | * Ugly. Use this to realign Token Ring packets for | |
302 | * e.g. PCA-200E driver. | |
303 | */ | |
304 | if (priv->is_trdev) { | |
305 | skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN); | |
306 | kfree_skb(skb); | |
307 | if (skb2 == NULL) | |
6ed10654 | 308 | return NETDEV_TX_OK; |
d44f7746 CW |
309 | skb = skb2; |
310 | } | |
1da177e4 LT |
311 | #endif |
312 | ||
1da177e4 | 313 | #if DUMP_PACKETS >= 2 |
c48192a7 | 314 | #define MAX_DUMP_SKB 99 |
1da177e4 | 315 | #elif DUMP_PACKETS >= 1 |
c48192a7 JP |
316 | #define MAX_DUMP_SKB 30 |
317 | #endif | |
318 | #if DUMP_PACKETS >= 1 | |
319 | printk(KERN_DEBUG "%s: send datalen:%ld lecid:%4.4x\n", | |
320 | dev->name, skb->len, priv->lecid); | |
321 | print_hex_dump(KERN_DEBUG, "", DUMP_OFFSET, 16, 1, | |
322 | skb->data, min(skb->len, MAX_DUMP_SKB), true); | |
1da177e4 | 323 | #endif /* DUMP_PACKETS >= 1 */ |
1da177e4 | 324 | |
d44f7746 | 325 | /* Minimum ethernet-frame size */ |
1da177e4 | 326 | #ifdef CONFIG_TR |
d44f7746 CW |
327 | if (priv->is_trdev) |
328 | min_frame_size = LEC_MINIMUM_8025_SIZE; | |
1da177e4 LT |
329 | else |
330 | #endif | |
d44f7746 CW |
331 | min_frame_size = LEC_MINIMUM_8023_SIZE; |
332 | if (skb->len < min_frame_size) { | |
333 | if ((skb->len + skb_tailroom(skb)) < min_frame_size) { | |
334 | skb2 = skb_copy_expand(skb, 0, | |
335 | min_frame_size - skb->truesize, | |
336 | GFP_ATOMIC); | |
337 | dev_kfree_skb(skb); | |
338 | if (skb2 == NULL) { | |
162619e5 | 339 | dev->stats.tx_dropped++; |
6ed10654 | 340 | return NETDEV_TX_OK; |
d44f7746 CW |
341 | } |
342 | skb = skb2; | |
343 | } | |
1da177e4 | 344 | skb_put(skb, min_frame_size - skb->len); |
d44f7746 CW |
345 | } |
346 | ||
347 | /* Send to right vcc */ | |
348 | is_rdesc = 0; | |
349 | dst = lec_h->h_dest; | |
1da177e4 | 350 | #ifdef CONFIG_TR |
d44f7746 CW |
351 | if (priv->is_trdev) { |
352 | dst = get_tr_dst(skb->data + 2, rdesc); | |
353 | if (dst == NULL) { | |
354 | dst = rdesc; | |
355 | is_rdesc = 1; | |
356 | } | |
357 | } | |
1da177e4 | 358 | #endif |
d44f7746 CW |
359 | entry = NULL; |
360 | vcc = lec_arp_resolve(priv, dst, is_rdesc, &entry); | |
99824461 JP |
361 | pr_debug("%s:vcc:%p vcc_flags:%lx, entry:%p\n", |
362 | dev->name, vcc, vcc ? vcc->flags : 0, entry); | |
d44f7746 CW |
363 | if (!vcc || !test_bit(ATM_VF_READY, &vcc->flags)) { |
364 | if (entry && (entry->tx_wait.qlen < LEC_UNRES_QUE_LEN)) { | |
99824461 JP |
365 | pr_debug("%s:queuing packet, MAC address %pM\n", |
366 | dev->name, lec_h->h_dest); | |
d44f7746 CW |
367 | skb_queue_tail(&entry->tx_wait, skb); |
368 | } else { | |
99824461 JP |
369 | pr_debug("%s:tx queue full or no arp entry, dropping, MAC address: %pM\n", |
370 | dev->name, lec_h->h_dest); | |
162619e5 | 371 | dev->stats.tx_dropped++; |
d44f7746 CW |
372 | dev_kfree_skb(skb); |
373 | } | |
6656e3c4 | 374 | goto out; |
d44f7746 CW |
375 | } |
376 | #if DUMP_PACKETS > 0 | |
c48192a7 JP |
377 | printk(KERN_DEBUG "%s:sending to vpi:%d vci:%d\n", |
378 | dev->name, vcc->vpi, vcc->vci); | |
1da177e4 | 379 | #endif /* DUMP_PACKETS > 0 */ |
d44f7746 CW |
380 | |
381 | while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) { | |
99824461 | 382 | pr_debug("emptying tx queue, MAC address %pM\n", lec_h->h_dest); |
162619e5 | 383 | lec_send(vcc, skb2); |
d44f7746 | 384 | } |
1da177e4 | 385 | |
162619e5 | 386 | lec_send(vcc, skb); |
1da177e4 LT |
387 | |
388 | if (!atm_may_send(vcc, 0)) { | |
389 | struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); | |
390 | ||
391 | vpriv->xoff = 1; | |
392 | netif_stop_queue(dev); | |
393 | ||
394 | /* | |
395 | * vcc->pop() might have occurred in between, making | |
396 | * the vcc usuable again. Since xmit is serialized, | |
397 | * this is the only situation we have to re-test. | |
398 | */ | |
399 | ||
400 | if (atm_may_send(vcc, 0)) | |
401 | netif_wake_queue(dev); | |
402 | } | |
403 | ||
6656e3c4 CW |
404 | out: |
405 | if (entry) | |
406 | lec_arp_put(entry); | |
1da177e4 | 407 | dev->trans_start = jiffies; |
6ed10654 | 408 | return NETDEV_TX_OK; |
1da177e4 LT |
409 | } |
410 | ||
411 | /* The inverse routine to net_open(). */ | |
d44f7746 | 412 | static int lec_close(struct net_device *dev) |
1da177e4 | 413 | { |
d44f7746 CW |
414 | netif_stop_queue(dev); |
415 | return 0; | |
1da177e4 LT |
416 | } |
417 | ||
d44f7746 | 418 | static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb) |
1da177e4 LT |
419 | { |
420 | unsigned long flags; | |
d44f7746 | 421 | struct net_device *dev = (struct net_device *)vcc->proto_data; |
524ad0a7 | 422 | struct lec_priv *priv = netdev_priv(dev); |
d44f7746 CW |
423 | struct atmlec_msg *mesg; |
424 | struct lec_arp_table *entry; | |
425 | int i; | |
426 | char *tmp; /* FIXME */ | |
1da177e4 LT |
427 | |
428 | atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); | |
d44f7746 CW |
429 | mesg = (struct atmlec_msg *)skb->data; |
430 | tmp = skb->data; | |
431 | tmp += sizeof(struct atmlec_msg); | |
52240062 | 432 | pr_debug("%s: msg from zeppelin:%d\n", dev->name, mesg->type); |
d44f7746 CW |
433 | switch (mesg->type) { |
434 | case l_set_mac_addr: | |
c48192a7 | 435 | for (i = 0; i < 6; i++) |
d44f7746 | 436 | dev->dev_addr[i] = mesg->content.normal.mac_addr[i]; |
d44f7746 CW |
437 | break; |
438 | case l_del_mac_addr: | |
c48192a7 | 439 | for (i = 0; i < 6; i++) |
d44f7746 | 440 | dev->dev_addr[i] = 0; |
d44f7746 CW |
441 | break; |
442 | case l_addr_delete: | |
443 | lec_addr_delete(priv, mesg->content.normal.atm_addr, | |
444 | mesg->content.normal.flag); | |
445 | break; | |
446 | case l_topology_change: | |
447 | priv->topology_change = mesg->content.normal.flag; | |
448 | break; | |
449 | case l_flush_complete: | |
450 | lec_flush_complete(priv, mesg->content.normal.flag); | |
451 | break; | |
452 | case l_narp_req: /* LANE2: see 7.1.35 in the lane2 spec */ | |
1da177e4 | 453 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
d44f7746 CW |
454 | entry = lec_arp_find(priv, mesg->content.normal.mac_addr); |
455 | lec_arp_remove(priv, entry); | |
1da177e4 LT |
456 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
457 | ||
d44f7746 CW |
458 | if (mesg->content.normal.no_source_le_narp) |
459 | break; | |
460 | /* FALL THROUGH */ | |
461 | case l_arp_update: | |
462 | lec_arp_update(priv, mesg->content.normal.mac_addr, | |
463 | mesg->content.normal.atm_addr, | |
464 | mesg->content.normal.flag, | |
465 | mesg->content.normal.targetless_le_arp); | |
99824461 | 466 | pr_debug("in l_arp_update\n"); |
d44f7746 | 467 | if (mesg->sizeoftlvs != 0) { /* LANE2 3.1.5 */ |
99824461 JP |
468 | pr_debug("LANE2 3.1.5, got tlvs, size %d\n", |
469 | mesg->sizeoftlvs); | |
d44f7746 CW |
470 | lane2_associate_ind(dev, mesg->content.normal.mac_addr, |
471 | tmp, mesg->sizeoftlvs); | |
472 | } | |
473 | break; | |
474 | case l_config: | |
475 | priv->maximum_unknown_frame_count = | |
476 | mesg->content.config.maximum_unknown_frame_count; | |
477 | priv->max_unknown_frame_time = | |
478 | (mesg->content.config.max_unknown_frame_time * HZ); | |
479 | priv->max_retry_count = mesg->content.config.max_retry_count; | |
480 | priv->aging_time = (mesg->content.config.aging_time * HZ); | |
481 | priv->forward_delay_time = | |
482 | (mesg->content.config.forward_delay_time * HZ); | |
483 | priv->arp_response_time = | |
484 | (mesg->content.config.arp_response_time * HZ); | |
485 | priv->flush_timeout = (mesg->content.config.flush_timeout * HZ); | |
486 | priv->path_switching_delay = | |
487 | (mesg->content.config.path_switching_delay * HZ); | |
c48192a7 JP |
488 | priv->lane_version = mesg->content.config.lane_version; |
489 | /* LANE2 */ | |
1da177e4 LT |
490 | priv->lane2_ops = NULL; |
491 | if (priv->lane_version > 1) | |
492 | priv->lane2_ops = &lane2_ops; | |
1f1900f9 | 493 | if (dev_set_mtu(dev, mesg->content.config.mtu)) |
c48192a7 JP |
494 | pr_info("%s: change_mtu to %d failed\n", |
495 | dev->name, mesg->content.config.mtu); | |
1da177e4 | 496 | priv->is_proxy = mesg->content.config.is_proxy; |
d44f7746 CW |
497 | break; |
498 | case l_flush_tran_id: | |
499 | lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr, | |
500 | mesg->content.normal.flag); | |
501 | break; | |
502 | case l_set_lecid: | |
503 | priv->lecid = | |
504 | (unsigned short)(0xffff & mesg->content.normal.flag); | |
505 | break; | |
506 | case l_should_bridge: | |
1da177e4 | 507 | #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) |
b4c84ec0 JP |
508 | { |
509 | pr_debug("%s: bridge zeppelin asks about %pM\n", | |
510 | dev->name, mesg->content.proxy.mac_addr); | |
d44f7746 | 511 | |
b4c84ec0 JP |
512 | if (br_fdb_test_addr_hook == NULL) |
513 | break; | |
d44f7746 | 514 | |
b4c84ec0 JP |
515 | if (br_fdb_test_addr_hook(dev, mesg->content.proxy.mac_addr)) { |
516 | /* hit from bridge table, send LE_ARP_RESPONSE */ | |
517 | struct sk_buff *skb2; | |
518 | struct sock *sk; | |
519 | ||
520 | pr_debug("%s: entry found, responding to zeppelin\n", | |
521 | dev->name); | |
522 | skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC); | |
523 | if (skb2 == NULL) | |
524 | break; | |
525 | skb2->len = sizeof(struct atmlec_msg); | |
526 | skb_copy_to_linear_data(skb2, mesg, sizeof(*mesg)); | |
527 | atm_force_charge(priv->lecd, skb2->truesize); | |
528 | sk = sk_atm(priv->lecd); | |
529 | skb_queue_tail(&sk->sk_receive_queue, skb2); | |
530 | sk->sk_data_ready(sk, skb2->len); | |
d44f7746 | 531 | } |
b4c84ec0 | 532 | } |
1da177e4 | 533 | #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */ |
d44f7746 CW |
534 | break; |
535 | default: | |
c48192a7 | 536 | pr_info("%s: Unknown message type %d\n", dev->name, mesg->type); |
d44f7746 CW |
537 | dev_kfree_skb(skb); |
538 | return -EINVAL; | |
539 | } | |
540 | dev_kfree_skb(skb); | |
541 | return 0; | |
1da177e4 LT |
542 | } |
543 | ||
d44f7746 | 544 | static void lec_atm_close(struct atm_vcc *vcc) |
1da177e4 | 545 | { |
d44f7746 CW |
546 | struct sk_buff *skb; |
547 | struct net_device *dev = (struct net_device *)vcc->proto_data; | |
524ad0a7 | 548 | struct lec_priv *priv = netdev_priv(dev); |
1da177e4 | 549 | |
d44f7746 CW |
550 | priv->lecd = NULL; |
551 | /* Do something needful? */ | |
1da177e4 | 552 | |
d44f7746 CW |
553 | netif_stop_queue(dev); |
554 | lec_arp_destroy(priv); | |
1da177e4 | 555 | |
d44f7746 | 556 | if (skb_peek(&sk_atm(vcc)->sk_receive_queue)) |
c48192a7 | 557 | pr_info("%s closing with messages pending\n", dev->name); |
b4c84ec0 | 558 | while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue))) { |
d44f7746 | 559 | atm_return(vcc, skb->truesize); |
1da177e4 | 560 | dev_kfree_skb(skb); |
d44f7746 CW |
561 | } |
562 | ||
c48192a7 | 563 | pr_info("%s: Shut down!\n", dev->name); |
d44f7746 | 564 | module_put(THIS_MODULE); |
1da177e4 LT |
565 | } |
566 | ||
567 | static struct atmdev_ops lecdev_ops = { | |
d44f7746 CW |
568 | .close = lec_atm_close, |
569 | .send = lec_atm_send | |
1da177e4 LT |
570 | }; |
571 | ||
572 | static struct atm_dev lecatm_dev = { | |
d44f7746 CW |
573 | .ops = &lecdev_ops, |
574 | .type = "lec", | |
575 | .number = 999, /* dummy device number */ | |
4ef8d0ae | 576 | .lock = __SPIN_LOCK_UNLOCKED(lecatm_dev.lock) |
1da177e4 LT |
577 | }; |
578 | ||
579 | /* | |
580 | * LANE2: new argument struct sk_buff *data contains | |
581 | * the LE_ARP based TLVs introduced in the LANE2 spec | |
582 | */ | |
d44f7746 CW |
583 | static int |
584 | send_to_lecd(struct lec_priv *priv, atmlec_msg_type type, | |
61c33e01 | 585 | const unsigned char *mac_addr, const unsigned char *atm_addr, |
d44f7746 | 586 | struct sk_buff *data) |
1da177e4 LT |
587 | { |
588 | struct sock *sk; | |
589 | struct sk_buff *skb; | |
590 | struct atmlec_msg *mesg; | |
591 | ||
c48192a7 | 592 | if (!priv || !priv->lecd) |
1da177e4 | 593 | return -1; |
1da177e4 LT |
594 | skb = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC); |
595 | if (!skb) | |
596 | return -1; | |
597 | skb->len = sizeof(struct atmlec_msg); | |
598 | mesg = (struct atmlec_msg *)skb->data; | |
d44f7746 | 599 | memset(mesg, 0, sizeof(struct atmlec_msg)); |
1da177e4 | 600 | mesg->type = type; |
d44f7746 CW |
601 | if (data != NULL) |
602 | mesg->sizeoftlvs = data->len; | |
1da177e4 LT |
603 | if (mac_addr) |
604 | memcpy(&mesg->content.normal.mac_addr, mac_addr, ETH_ALEN); | |
d44f7746 CW |
605 | else |
606 | mesg->content.normal.targetless_le_arp = 1; | |
1da177e4 LT |
607 | if (atm_addr) |
608 | memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN); | |
609 | ||
d44f7746 | 610 | atm_force_charge(priv->lecd, skb->truesize); |
1da177e4 LT |
611 | sk = sk_atm(priv->lecd); |
612 | skb_queue_tail(&sk->sk_receive_queue, skb); | |
d44f7746 | 613 | sk->sk_data_ready(sk, skb->len); |
1da177e4 | 614 | |
d44f7746 | 615 | if (data != NULL) { |
99824461 | 616 | pr_debug("about to send %d bytes of data\n", data->len); |
d44f7746 CW |
617 | atm_force_charge(priv->lecd, data->truesize); |
618 | skb_queue_tail(&sk->sk_receive_queue, data); | |
619 | sk->sk_data_ready(sk, skb->len); | |
620 | } | |
1da177e4 | 621 | |
d44f7746 | 622 | return 0; |
1da177e4 LT |
623 | } |
624 | ||
625 | /* shamelessly stolen from drivers/net/net_init.c */ | |
626 | static int lec_change_mtu(struct net_device *dev, int new_mtu) | |
627 | { | |
d44f7746 CW |
628 | if ((new_mtu < 68) || (new_mtu > 18190)) |
629 | return -EINVAL; | |
630 | dev->mtu = new_mtu; | |
631 | return 0; | |
1da177e4 LT |
632 | } |
633 | ||
634 | static void lec_set_multicast_list(struct net_device *dev) | |
635 | { | |
d44f7746 CW |
636 | /* |
637 | * by default, all multicast frames arrive over the bus. | |
638 | * eventually support selective multicast service | |
639 | */ | |
1da177e4 LT |
640 | } |
641 | ||
004b3225 SH |
642 | static const struct net_device_ops lec_netdev_ops = { |
643 | .ndo_open = lec_open, | |
644 | .ndo_stop = lec_close, | |
645 | .ndo_start_xmit = lec_start_xmit, | |
646 | .ndo_change_mtu = lec_change_mtu, | |
647 | .ndo_tx_timeout = lec_tx_timeout, | |
648 | .ndo_set_multicast_list = lec_set_multicast_list, | |
649 | }; | |
650 | ||
61c33e01 | 651 | static const unsigned char lec_ctrl_magic[] = { |
d44f7746 CW |
652 | 0xff, |
653 | 0x00, | |
654 | 0x01, | |
655 | 0x01 | |
656 | }; | |
1da177e4 | 657 | |
4a7097fc ST |
658 | #define LEC_DATA_DIRECT_8023 2 |
659 | #define LEC_DATA_DIRECT_8025 3 | |
660 | ||
661 | static int lec_is_data_direct(struct atm_vcc *vcc) | |
d44f7746 | 662 | { |
4a7097fc ST |
663 | return ((vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8023) || |
664 | (vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8025)); | |
d44f7746 | 665 | } |
4a7097fc | 666 | |
d44f7746 | 667 | static void lec_push(struct atm_vcc *vcc, struct sk_buff *skb) |
1da177e4 | 668 | { |
4a7097fc | 669 | unsigned long flags; |
d44f7746 | 670 | struct net_device *dev = (struct net_device *)vcc->proto_data; |
524ad0a7 | 671 | struct lec_priv *priv = netdev_priv(dev); |
1da177e4 | 672 | |
c48192a7 | 673 | #if DUMP_PACKETS > 0 |
99824461 JP |
674 | printk(KERN_DEBUG "%s: vcc vpi:%d vci:%d\n", |
675 | dev->name, vcc->vpi, vcc->vci); | |
1da177e4 | 676 | #endif |
d44f7746 | 677 | if (!skb) { |
52240062 | 678 | pr_debug("%s: null skb\n", dev->name); |
d44f7746 CW |
679 | lec_vcc_close(priv, vcc); |
680 | return; | |
681 | } | |
1da177e4 | 682 | #if DUMP_PACKETS >= 2 |
99824461 | 683 | #define MAX_SKB_DUMP 99 |
1da177e4 | 684 | #elif DUMP_PACKETS >= 1 |
99824461 JP |
685 | #define MAX_SKB_DUMP 30 |
686 | #endif | |
687 | #if DUMP_PACKETS > 0 | |
688 | printk(KERN_DEBUG "%s: rcv datalen:%ld lecid:%4.4x\n", | |
689 | dev->name, skb->len, priv->lecid); | |
690 | print_hex_dump(KERN_DEBUG, "", DUMP_OFFSET, 16, 1, | |
691 | skb->data, min(MAX_SKB_DUMP, skb->len), true); | |
1da177e4 | 692 | #endif /* DUMP_PACKETS > 0 */ |
99824461 JP |
693 | if (memcmp(skb->data, lec_ctrl_magic, 4) == 0) { |
694 | /* Control frame, to daemon */ | |
1da177e4 LT |
695 | struct sock *sk = sk_atm(vcc); |
696 | ||
52240062 | 697 | pr_debug("%s: To daemon\n", dev->name); |
d44f7746 CW |
698 | skb_queue_tail(&sk->sk_receive_queue, skb); |
699 | sk->sk_data_ready(sk, skb->len); | |
700 | } else { /* Data frame, queue to protocol handlers */ | |
4a7097fc | 701 | struct lec_arp_table *entry; |
d44f7746 CW |
702 | unsigned char *src, *dst; |
703 | ||
704 | atm_return(vcc, skb->truesize); | |
30d492da | 705 | if (*(__be16 *) skb->data == htons(priv->lecid) || |
d44f7746 CW |
706 | !priv->lecd || !(dev->flags & IFF_UP)) { |
707 | /* | |
708 | * Probably looping back, or if lecd is missing, | |
709 | * lecd has gone down | |
710 | */ | |
52240062 | 711 | pr_debug("Ignoring frame...\n"); |
d44f7746 CW |
712 | dev_kfree_skb(skb); |
713 | return; | |
714 | } | |
1da177e4 | 715 | #ifdef CONFIG_TR |
d44f7746 CW |
716 | if (priv->is_trdev) |
717 | dst = ((struct lecdatahdr_8025 *)skb->data)->h_dest; | |
718 | else | |
1da177e4 | 719 | #endif |
d44f7746 | 720 | dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest; |
4a7097fc | 721 | |
d44f7746 CW |
722 | /* |
723 | * If this is a Data Direct VCC, and the VCC does not match | |
4a7097fc ST |
724 | * the LE_ARP cache entry, delete the LE_ARP cache entry. |
725 | */ | |
726 | spin_lock_irqsave(&priv->lec_arp_lock, flags); | |
727 | if (lec_is_data_direct(vcc)) { | |
728 | #ifdef CONFIG_TR | |
729 | if (priv->is_trdev) | |
d44f7746 CW |
730 | src = |
731 | ((struct lecdatahdr_8025 *)skb->data)-> | |
732 | h_source; | |
4a7097fc ST |
733 | else |
734 | #endif | |
d44f7746 CW |
735 | src = |
736 | ((struct lecdatahdr_8023 *)skb->data)-> | |
737 | h_source; | |
4a7097fc ST |
738 | entry = lec_arp_find(priv, src); |
739 | if (entry && entry->vcc != vcc) { | |
740 | lec_arp_remove(priv, entry); | |
33a9c2d4 | 741 | lec_arp_put(entry); |
4a7097fc ST |
742 | } |
743 | } | |
744 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); | |
1da177e4 | 745 | |
d44f7746 CW |
746 | if (!(dst[0] & 0x01) && /* Never filter Multi/Broadcast */ |
747 | !priv->is_proxy && /* Proxy wants all the packets */ | |
1da177e4 | 748 | memcmp(dst, dev->dev_addr, dev->addr_len)) { |
d44f7746 CW |
749 | dev_kfree_skb(skb); |
750 | return; | |
751 | } | |
c48192a7 | 752 | if (!hlist_empty(&priv->lec_arp_empty_ones)) |
d44f7746 | 753 | lec_arp_check_empties(priv, vcc, skb); |
d44f7746 | 754 | skb_pull(skb, 2); /* skip lec_id */ |
1da177e4 | 755 | #ifdef CONFIG_TR |
d44f7746 CW |
756 | if (priv->is_trdev) |
757 | skb->protocol = tr_type_trans(skb, dev); | |
758 | else | |
1da177e4 | 759 | #endif |
d44f7746 | 760 | skb->protocol = eth_type_trans(skb, dev); |
162619e5 SH |
761 | dev->stats.rx_packets++; |
762 | dev->stats.rx_bytes += skb->len; | |
d44f7746 CW |
763 | memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data)); |
764 | netif_rx(skb); | |
765 | } | |
1da177e4 LT |
766 | } |
767 | ||
d44f7746 | 768 | static void lec_pop(struct atm_vcc *vcc, struct sk_buff *skb) |
1da177e4 LT |
769 | { |
770 | struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); | |
771 | struct net_device *dev = skb->dev; | |
772 | ||
773 | if (vpriv == NULL) { | |
99824461 | 774 | pr_info("vpriv = NULL!?!?!?\n"); |
1da177e4 LT |
775 | return; |
776 | } | |
777 | ||
778 | vpriv->old_pop(vcc, skb); | |
779 | ||
780 | if (vpriv->xoff && atm_may_send(vcc, 0)) { | |
781 | vpriv->xoff = 0; | |
782 | if (netif_running(dev) && netif_queue_stopped(dev)) | |
783 | netif_wake_queue(dev); | |
784 | } | |
785 | } | |
786 | ||
d44f7746 | 787 | static int lec_vcc_attach(struct atm_vcc *vcc, void __user *arg) |
1da177e4 LT |
788 | { |
789 | struct lec_vcc_priv *vpriv; | |
d44f7746 CW |
790 | int bytes_left; |
791 | struct atmlec_ioc ioc_data; | |
792 | ||
793 | /* Lecd must be up in this case */ | |
794 | bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc)); | |
99824461 JP |
795 | if (bytes_left != 0) |
796 | pr_info("copy from user failed for %d bytes\n", bytes_left); | |
d44f7746 CW |
797 | if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF || |
798 | !dev_lec[ioc_data.dev_num]) | |
799 | return -EINVAL; | |
c48192a7 JP |
800 | vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL); |
801 | if (!vpriv) | |
1da177e4 LT |
802 | return -ENOMEM; |
803 | vpriv->xoff = 0; | |
804 | vpriv->old_pop = vcc->pop; | |
805 | vcc->user_back = vpriv; | |
806 | vcc->pop = lec_pop; | |
524ad0a7 | 807 | lec_vcc_added(netdev_priv(dev_lec[ioc_data.dev_num]), |
d44f7746 CW |
808 | &ioc_data, vcc, vcc->push); |
809 | vcc->proto_data = dev_lec[ioc_data.dev_num]; | |
810 | vcc->push = lec_push; | |
811 | return 0; | |
1da177e4 LT |
812 | } |
813 | ||
d44f7746 | 814 | static int lec_mcast_attach(struct atm_vcc *vcc, int arg) |
1da177e4 | 815 | { |
d44f7746 CW |
816 | if (arg < 0 || arg >= MAX_LEC_ITF || !dev_lec[arg]) |
817 | return -EINVAL; | |
818 | vcc->proto_data = dev_lec[arg]; | |
37d66800 | 819 | return lec_mcast_make(netdev_priv(dev_lec[arg]), vcc); |
1da177e4 LT |
820 | } |
821 | ||
822 | /* Initialize device. */ | |
d44f7746 CW |
823 | static int lecd_attach(struct atm_vcc *vcc, int arg) |
824 | { | |
825 | int i; | |
826 | struct lec_priv *priv; | |
827 | ||
828 | if (arg < 0) | |
829 | i = 0; | |
830 | else | |
831 | i = arg; | |
1da177e4 | 832 | #ifdef CONFIG_TR |
d44f7746 CW |
833 | if (arg >= MAX_LEC_ITF) |
834 | return -EINVAL; | |
835 | #else /* Reserve the top NUM_TR_DEVS for TR */ | |
836 | if (arg >= (MAX_LEC_ITF - NUM_TR_DEVS)) | |
837 | return -EINVAL; | |
1da177e4 | 838 | #endif |
d44f7746 CW |
839 | if (!dev_lec[i]) { |
840 | int is_trdev, size; | |
1da177e4 | 841 | |
d44f7746 CW |
842 | is_trdev = 0; |
843 | if (i >= (MAX_LEC_ITF - NUM_TR_DEVS)) | |
844 | is_trdev = 1; | |
1da177e4 | 845 | |
d44f7746 | 846 | size = sizeof(struct lec_priv); |
1da177e4 | 847 | #ifdef CONFIG_TR |
d44f7746 CW |
848 | if (is_trdev) |
849 | dev_lec[i] = alloc_trdev(size); | |
850 | else | |
1da177e4 | 851 | #endif |
d44f7746 CW |
852 | dev_lec[i] = alloc_etherdev(size); |
853 | if (!dev_lec[i]) | |
854 | return -ENOMEM; | |
eb044588 | 855 | dev_lec[i]->netdev_ops = &lec_netdev_ops; |
d44f7746 CW |
856 | snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i); |
857 | if (register_netdev(dev_lec[i])) { | |
858 | free_netdev(dev_lec[i]); | |
859 | return -EINVAL; | |
860 | } | |
861 | ||
524ad0a7 | 862 | priv = netdev_priv(dev_lec[i]); |
d44f7746 | 863 | priv->is_trdev = is_trdev; |
d44f7746 | 864 | } else { |
524ad0a7 | 865 | priv = netdev_priv(dev_lec[i]); |
d44f7746 CW |
866 | if (priv->lecd) |
867 | return -EADDRINUSE; | |
868 | } | |
869 | lec_arp_init(priv); | |
870 | priv->itfnum = i; /* LANE2 addition */ | |
871 | priv->lecd = vcc; | |
872 | vcc->dev = &lecatm_dev; | |
873 | vcc_insert_socket(sk_atm(vcc)); | |
874 | ||
875 | vcc->proto_data = dev_lec[i]; | |
876 | set_bit(ATM_VF_META, &vcc->flags); | |
877 | set_bit(ATM_VF_READY, &vcc->flags); | |
878 | ||
879 | /* Set default values to these variables */ | |
880 | priv->maximum_unknown_frame_count = 1; | |
881 | priv->max_unknown_frame_time = (1 * HZ); | |
882 | priv->vcc_timeout_period = (1200 * HZ); | |
883 | priv->max_retry_count = 1; | |
884 | priv->aging_time = (300 * HZ); | |
885 | priv->forward_delay_time = (15 * HZ); | |
886 | priv->topology_change = 0; | |
887 | priv->arp_response_time = (1 * HZ); | |
888 | priv->flush_timeout = (4 * HZ); | |
889 | priv->path_switching_delay = (6 * HZ); | |
890 | ||
c48192a7 | 891 | if (dev_lec[i]->flags & IFF_UP) |
d44f7746 | 892 | netif_start_queue(dev_lec[i]); |
d44f7746 CW |
893 | __module_get(THIS_MODULE); |
894 | return i; | |
1da177e4 LT |
895 | } |
896 | ||
897 | #ifdef CONFIG_PROC_FS | |
36cbd3dc | 898 | static const char *lec_arp_get_status_string(unsigned char status) |
1da177e4 | 899 | { |
36cbd3dc | 900 | static const char *const lec_arp_status_string[] = { |
1da177e4 LT |
901 | "ESI_UNKNOWN ", |
902 | "ESI_ARP_PENDING ", | |
903 | "ESI_VC_PENDING ", | |
904 | "<Undefined> ", | |
905 | "ESI_FLUSH_PENDING ", | |
906 | "ESI_FORWARD_DIRECT" | |
907 | }; | |
908 | ||
909 | if (status > ESI_FORWARD_DIRECT) | |
910 | status = 3; /* ESI_UNDEFINED */ | |
911 | return lec_arp_status_string[status]; | |
912 | } | |
913 | ||
914 | static void lec_info(struct seq_file *seq, struct lec_arp_table *entry) | |
915 | { | |
916 | int i; | |
917 | ||
918 | for (i = 0; i < ETH_ALEN; i++) | |
919 | seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff); | |
920 | seq_printf(seq, " "); | |
921 | for (i = 0; i < ATM_ESA_LEN; i++) | |
922 | seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff); | |
923 | seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status), | |
924 | entry->flags & 0xffff); | |
925 | if (entry->vcc) | |
926 | seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci); | |
927 | else | |
d44f7746 | 928 | seq_printf(seq, " "); |
1da177e4 LT |
929 | if (entry->recv_vcc) { |
930 | seq_printf(seq, " %3d %3d", entry->recv_vcc->vpi, | |
931 | entry->recv_vcc->vci); | |
d44f7746 CW |
932 | } |
933 | seq_putc(seq, '\n'); | |
1da177e4 LT |
934 | } |
935 | ||
1da177e4 LT |
936 | struct lec_state { |
937 | unsigned long flags; | |
938 | struct lec_priv *locked; | |
d0732f64 | 939 | struct hlist_node *node; |
1da177e4 LT |
940 | struct net_device *dev; |
941 | int itf; | |
942 | int arp_table; | |
943 | int misc_table; | |
944 | }; | |
945 | ||
d0732f64 | 946 | static void *lec_tbl_walk(struct lec_state *state, struct hlist_head *tbl, |
1da177e4 LT |
947 | loff_t *l) |
948 | { | |
d0732f64 CW |
949 | struct hlist_node *e = state->node; |
950 | struct lec_arp_table *tmp; | |
1da177e4 LT |
951 | |
952 | if (!e) | |
d0732f64 | 953 | e = tbl->first; |
2e1e9848 | 954 | if (e == SEQ_START_TOKEN) { |
d0732f64 | 955 | e = tbl->first; |
1da177e4 LT |
956 | --*l; |
957 | } | |
d0732f64 CW |
958 | |
959 | hlist_for_each_entry_from(tmp, e, next) { | |
1da177e4 LT |
960 | if (--*l < 0) |
961 | break; | |
962 | } | |
d0732f64 CW |
963 | state->node = e; |
964 | ||
1da177e4 LT |
965 | return (*l < 0) ? state : NULL; |
966 | } | |
967 | ||
968 | static void *lec_arp_walk(struct lec_state *state, loff_t *l, | |
d44f7746 | 969 | struct lec_priv *priv) |
1da177e4 LT |
970 | { |
971 | void *v = NULL; | |
972 | int p; | |
973 | ||
974 | for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) { | |
d0732f64 | 975 | v = lec_tbl_walk(state, &priv->lec_arp_tables[p], l); |
1da177e4 LT |
976 | if (v) |
977 | break; | |
978 | } | |
979 | state->arp_table = p; | |
980 | return v; | |
981 | } | |
982 | ||
983 | static void *lec_misc_walk(struct lec_state *state, loff_t *l, | |
984 | struct lec_priv *priv) | |
985 | { | |
d0732f64 CW |
986 | struct hlist_head *lec_misc_tables[] = { |
987 | &priv->lec_arp_empty_ones, | |
988 | &priv->lec_no_forward, | |
989 | &priv->mcast_fwds | |
1da177e4 LT |
990 | }; |
991 | void *v = NULL; | |
992 | int q; | |
993 | ||
994 | for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) { | |
995 | v = lec_tbl_walk(state, lec_misc_tables[q], l); | |
996 | if (v) | |
997 | break; | |
998 | } | |
999 | state->misc_table = q; | |
1000 | return v; | |
1001 | } | |
1002 | ||
1003 | static void *lec_priv_walk(struct lec_state *state, loff_t *l, | |
1004 | struct lec_priv *priv) | |
1005 | { | |
1006 | if (!state->locked) { | |
1007 | state->locked = priv; | |
1008 | spin_lock_irqsave(&priv->lec_arp_lock, state->flags); | |
1009 | } | |
d44f7746 | 1010 | if (!lec_arp_walk(state, l, priv) && !lec_misc_walk(state, l, priv)) { |
1da177e4 LT |
1011 | spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags); |
1012 | state->locked = NULL; | |
1013 | /* Partial state reset for the next time we get called */ | |
1014 | state->arp_table = state->misc_table = 0; | |
1015 | } | |
1016 | return state->locked; | |
1017 | } | |
1018 | ||
1019 | static void *lec_itf_walk(struct lec_state *state, loff_t *l) | |
1020 | { | |
1021 | struct net_device *dev; | |
1022 | void *v; | |
1023 | ||
1024 | dev = state->dev ? state->dev : dev_lec[state->itf]; | |
524ad0a7 WC |
1025 | v = (dev && netdev_priv(dev)) ? |
1026 | lec_priv_walk(state, l, netdev_priv(dev)) : NULL; | |
1da177e4 LT |
1027 | if (!v && dev) { |
1028 | dev_put(dev); | |
1029 | /* Partial state reset for the next time we get called */ | |
1030 | dev = NULL; | |
1031 | } | |
1032 | state->dev = dev; | |
1033 | return v; | |
1034 | } | |
1035 | ||
1036 | static void *lec_get_idx(struct lec_state *state, loff_t l) | |
1037 | { | |
1038 | void *v = NULL; | |
1039 | ||
1040 | for (; state->itf < MAX_LEC_ITF; state->itf++) { | |
1041 | v = lec_itf_walk(state, &l); | |
1042 | if (v) | |
1043 | break; | |
1044 | } | |
d44f7746 | 1045 | return v; |
1da177e4 LT |
1046 | } |
1047 | ||
1048 | static void *lec_seq_start(struct seq_file *seq, loff_t *pos) | |
1049 | { | |
1050 | struct lec_state *state = seq->private; | |
1051 | ||
1052 | state->itf = 0; | |
1053 | state->dev = NULL; | |
1054 | state->locked = NULL; | |
1055 | state->arp_table = 0; | |
1056 | state->misc_table = 0; | |
2e1e9848 | 1057 | state->node = SEQ_START_TOKEN; |
1da177e4 | 1058 | |
2e1e9848 | 1059 | return *pos ? lec_get_idx(state, *pos) : SEQ_START_TOKEN; |
1da177e4 LT |
1060 | } |
1061 | ||
1062 | static void lec_seq_stop(struct seq_file *seq, void *v) | |
1063 | { | |
1064 | struct lec_state *state = seq->private; | |
1065 | ||
1066 | if (state->dev) { | |
1067 | spin_unlock_irqrestore(&state->locked->lec_arp_lock, | |
1068 | state->flags); | |
1069 | dev_put(state->dev); | |
1070 | } | |
1071 | } | |
1072 | ||
1073 | static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1074 | { | |
1075 | struct lec_state *state = seq->private; | |
1076 | ||
1077 | v = lec_get_idx(state, 1); | |
1078 | *pos += !!PTR_ERR(v); | |
1079 | return v; | |
1080 | } | |
1081 | ||
1082 | static int lec_seq_show(struct seq_file *seq, void *v) | |
1083 | { | |
36cbd3dc JE |
1084 | static const char lec_banner[] = |
1085 | "Itf MAC ATM destination" | |
d44f7746 CW |
1086 | " Status Flags " |
1087 | "VPI/VCI Recv VPI/VCI\n"; | |
1da177e4 | 1088 | |
2e1e9848 | 1089 | if (v == SEQ_START_TOKEN) |
1da177e4 LT |
1090 | seq_puts(seq, lec_banner); |
1091 | else { | |
1092 | struct lec_state *state = seq->private; | |
d44f7746 | 1093 | struct net_device *dev = state->dev; |
c48192a7 JP |
1094 | struct lec_arp_table *entry = hlist_entry(state->node, |
1095 | struct lec_arp_table, | |
1096 | next); | |
1da177e4 LT |
1097 | |
1098 | seq_printf(seq, "%s ", dev->name); | |
d0732f64 | 1099 | lec_info(seq, entry); |
1da177e4 LT |
1100 | } |
1101 | return 0; | |
1102 | } | |
1103 | ||
56b3d975 | 1104 | static const struct seq_operations lec_seq_ops = { |
d44f7746 CW |
1105 | .start = lec_seq_start, |
1106 | .next = lec_seq_next, | |
1107 | .stop = lec_seq_stop, | |
1108 | .show = lec_seq_show, | |
1da177e4 LT |
1109 | }; |
1110 | ||
1111 | static int lec_seq_open(struct inode *inode, struct file *file) | |
1112 | { | |
9a8c09e7 | 1113 | return seq_open_private(file, &lec_seq_ops, sizeof(struct lec_state)); |
1da177e4 LT |
1114 | } |
1115 | ||
9a32144e | 1116 | static const struct file_operations lec_seq_fops = { |
d44f7746 CW |
1117 | .owner = THIS_MODULE, |
1118 | .open = lec_seq_open, | |
1119 | .read = seq_read, | |
1120 | .llseek = seq_lseek, | |
9a8c09e7 | 1121 | .release = seq_release_private, |
1da177e4 LT |
1122 | }; |
1123 | #endif | |
1124 | ||
1125 | static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
1126 | { | |
1127 | struct atm_vcc *vcc = ATM_SD(sock); | |
1128 | int err = 0; | |
d44f7746 | 1129 | |
1da177e4 | 1130 | switch (cmd) { |
d44f7746 CW |
1131 | case ATMLEC_CTRL: |
1132 | case ATMLEC_MCAST: | |
1133 | case ATMLEC_DATA: | |
1134 | if (!capable(CAP_NET_ADMIN)) | |
1135 | return -EPERM; | |
1136 | break; | |
1137 | default: | |
1138 | return -ENOIOCTLCMD; | |
1da177e4 LT |
1139 | } |
1140 | ||
1141 | switch (cmd) { | |
d44f7746 CW |
1142 | case ATMLEC_CTRL: |
1143 | err = lecd_attach(vcc, (int)arg); | |
1144 | if (err >= 0) | |
1145 | sock->state = SS_CONNECTED; | |
1146 | break; | |
1147 | case ATMLEC_MCAST: | |
1148 | err = lec_mcast_attach(vcc, (int)arg); | |
1149 | break; | |
1150 | case ATMLEC_DATA: | |
1151 | err = lec_vcc_attach(vcc, (void __user *)arg); | |
1152 | break; | |
1da177e4 LT |
1153 | } |
1154 | ||
1155 | return err; | |
1156 | } | |
1157 | ||
1158 | static struct atm_ioctl lane_ioctl_ops = { | |
d44f7746 CW |
1159 | .owner = THIS_MODULE, |
1160 | .ioctl = lane_ioctl, | |
1da177e4 LT |
1161 | }; |
1162 | ||
1163 | static int __init lane_module_init(void) | |
1164 | { | |
1165 | #ifdef CONFIG_PROC_FS | |
1166 | struct proc_dir_entry *p; | |
1167 | ||
16e297b3 | 1168 | p = proc_create("lec", S_IRUGO, atm_proc_root, &lec_seq_fops); |
dbee0d3f | 1169 | if (!p) { |
99824461 | 1170 | pr_err("Unable to initialize /proc/net/atm/lec\n"); |
dbee0d3f WC |
1171 | return -ENOMEM; |
1172 | } | |
1da177e4 LT |
1173 | #endif |
1174 | ||
1175 | register_atm_ioctl(&lane_ioctl_ops); | |
c48192a7 | 1176 | pr_info("lec.c: " __DATE__ " " __TIME__ " initialized\n"); |
d44f7746 | 1177 | return 0; |
1da177e4 LT |
1178 | } |
1179 | ||
1180 | static void __exit lane_module_cleanup(void) | |
1181 | { | |
d44f7746 CW |
1182 | int i; |
1183 | struct lec_priv *priv; | |
1da177e4 LT |
1184 | |
1185 | remove_proc_entry("lec", atm_proc_root); | |
1186 | ||
1187 | deregister_atm_ioctl(&lane_ioctl_ops); | |
1188 | ||
d44f7746 CW |
1189 | for (i = 0; i < MAX_LEC_ITF; i++) { |
1190 | if (dev_lec[i] != NULL) { | |
524ad0a7 | 1191 | priv = netdev_priv(dev_lec[i]); |
1da177e4 | 1192 | unregister_netdev(dev_lec[i]); |
d44f7746 CW |
1193 | free_netdev(dev_lec[i]); |
1194 | dev_lec[i] = NULL; | |
1195 | } | |
1196 | } | |
1da177e4 LT |
1197 | } |
1198 | ||
1199 | module_init(lane_module_init); | |
1200 | module_exit(lane_module_cleanup); | |
1201 | ||
1202 | /* | |
1203 | * LANE2: 3.1.3, LE_RESOLVE.request | |
1204 | * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs. | |
1205 | * If sizeoftlvs == NULL the default TLVs associated with with this | |
1206 | * lec will be used. | |
1207 | * If dst_mac == NULL, targetless LE_ARP will be sent | |
1208 | */ | |
61c33e01 | 1209 | static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force, |
d44f7746 | 1210 | u8 **tlvs, u32 *sizeoftlvs) |
1da177e4 LT |
1211 | { |
1212 | unsigned long flags; | |
524ad0a7 | 1213 | struct lec_priv *priv = netdev_priv(dev); |
d44f7746 CW |
1214 | struct lec_arp_table *table; |
1215 | struct sk_buff *skb; | |
1216 | int retval; | |
1da177e4 | 1217 | |
d44f7746 | 1218 | if (force == 0) { |
1da177e4 | 1219 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
d44f7746 | 1220 | table = lec_arp_find(priv, dst_mac); |
1da177e4 | 1221 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
d44f7746 CW |
1222 | if (table == NULL) |
1223 | return -1; | |
1224 | ||
2afe37cd | 1225 | *tlvs = kmemdup(table->tlvs, table->sizeoftlvs, GFP_ATOMIC); |
d44f7746 CW |
1226 | if (*tlvs == NULL) |
1227 | return -1; | |
1228 | ||
d44f7746 CW |
1229 | *sizeoftlvs = table->sizeoftlvs; |
1230 | ||
1231 | return 0; | |
1232 | } | |
1da177e4 LT |
1233 | |
1234 | if (sizeoftlvs == NULL) | |
1235 | retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL); | |
d44f7746 | 1236 | |
1da177e4 LT |
1237 | else { |
1238 | skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC); | |
1239 | if (skb == NULL) | |
1240 | return -1; | |
1241 | skb->len = *sizeoftlvs; | |
27d7ff46 | 1242 | skb_copy_to_linear_data(skb, *tlvs, *sizeoftlvs); |
1da177e4 LT |
1243 | retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb); |
1244 | } | |
d44f7746 CW |
1245 | return retval; |
1246 | } | |
1da177e4 LT |
1247 | |
1248 | /* | |
1249 | * LANE2: 3.1.4, LE_ASSOCIATE.request | |
1250 | * Associate the *tlvs with the *lan_dst address. | |
1251 | * Will overwrite any previous association | |
1252 | * Returns 1 for success, 0 for failure (out of memory) | |
1253 | * | |
1254 | */ | |
61c33e01 MBJ |
1255 | static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst, |
1256 | const u8 *tlvs, u32 sizeoftlvs) | |
1da177e4 | 1257 | { |
d44f7746 CW |
1258 | int retval; |
1259 | struct sk_buff *skb; | |
524ad0a7 | 1260 | struct lec_priv *priv = netdev_priv(dev); |
d44f7746 CW |
1261 | |
1262 | if (compare_ether_addr(lan_dst, dev->dev_addr)) | |
c48192a7 | 1263 | return 0; /* not our mac address */ |
d44f7746 CW |
1264 | |
1265 | kfree(priv->tlvs); /* NULL if there was no previous association */ | |
1266 | ||
2afe37cd | 1267 | priv->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL); |
d44f7746 | 1268 | if (priv->tlvs == NULL) |
c48192a7 | 1269 | return 0; |
d44f7746 | 1270 | priv->sizeoftlvs = sizeoftlvs; |
d44f7746 CW |
1271 | |
1272 | skb = alloc_skb(sizeoftlvs, GFP_ATOMIC); | |
1273 | if (skb == NULL) | |
1274 | return 0; | |
1275 | skb->len = sizeoftlvs; | |
27d7ff46 | 1276 | skb_copy_to_linear_data(skb, tlvs, sizeoftlvs); |
d44f7746 CW |
1277 | retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb); |
1278 | if (retval != 0) | |
c48192a7 | 1279 | pr_info("lec.c: lane2_associate_req() failed\n"); |
d44f7746 CW |
1280 | /* |
1281 | * If the previous association has changed we must | |
1282 | * somehow notify other LANE entities about the change | |
1283 | */ | |
c48192a7 | 1284 | return 1; |
1da177e4 LT |
1285 | } |
1286 | ||
1287 | /* | |
1288 | * LANE2: 3.1.5, LE_ASSOCIATE.indication | |
1289 | * | |
1290 | */ | |
61c33e01 MBJ |
1291 | static void lane2_associate_ind(struct net_device *dev, const u8 *mac_addr, |
1292 | const u8 *tlvs, u32 sizeoftlvs) | |
1da177e4 LT |
1293 | { |
1294 | #if 0 | |
d44f7746 | 1295 | int i = 0; |
1da177e4 | 1296 | #endif |
524ad0a7 | 1297 | struct lec_priv *priv = netdev_priv(dev); |
d44f7746 CW |
1298 | #if 0 /* |
1299 | * Why have the TLVs in LE_ARP entries | |
1300 | * since we do not use them? When you | |
1301 | * uncomment this code, make sure the | |
1302 | * TLVs get freed when entry is killed | |
1303 | */ | |
1304 | struct lec_arp_table *entry = lec_arp_find(priv, mac_addr); | |
1da177e4 | 1305 | |
d44f7746 CW |
1306 | if (entry == NULL) |
1307 | return; /* should not happen */ | |
1da177e4 | 1308 | |
d44f7746 | 1309 | kfree(entry->tlvs); |
1da177e4 | 1310 | |
2afe37cd | 1311 | entry->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL); |
d44f7746 CW |
1312 | if (entry->tlvs == NULL) |
1313 | return; | |
d44f7746 | 1314 | entry->sizeoftlvs = sizeoftlvs; |
1da177e4 LT |
1315 | #endif |
1316 | #if 0 | |
c48192a7 JP |
1317 | pr_info("\n"); |
1318 | pr_info("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs); | |
d44f7746 | 1319 | while (i < sizeoftlvs) |
c48192a7 | 1320 | pr_cont("%02x ", tlvs[i++]); |
d44f7746 | 1321 | |
c48192a7 | 1322 | pr_cont("\n"); |
1da177e4 LT |
1323 | #endif |
1324 | ||
d44f7746 CW |
1325 | /* tell MPOA about the TLVs we saw */ |
1326 | if (priv->lane2_ops && priv->lane2_ops->associate_indicator) { | |
1327 | priv->lane2_ops->associate_indicator(dev, mac_addr, | |
1328 | tlvs, sizeoftlvs); | |
1329 | } | |
1da177e4 LT |
1330 | } |
1331 | ||
1332 | /* | |
1333 | * Here starts what used to lec_arpc.c | |
1334 | * | |
1335 | * lec_arpc.c was added here when making | |
1336 | * lane client modular. October 1997 | |
1da177e4 LT |
1337 | */ |
1338 | ||
1339 | #include <linux/types.h> | |
1da177e4 | 1340 | #include <linux/timer.h> |
c48192a7 | 1341 | #include <linux/param.h> |
1da177e4 LT |
1342 | #include <asm/atomic.h> |
1343 | #include <linux/inetdevice.h> | |
1344 | #include <net/route.h> | |
1345 | ||
1da177e4 | 1346 | #if 0 |
c48192a7 | 1347 | #define pr_debug(format, args...) |
1da177e4 | 1348 | /* |
99824461 | 1349 | #define pr_debug printk |
1da177e4 LT |
1350 | */ |
1351 | #endif | |
1352 | #define DEBUG_ARP_TABLE 0 | |
1353 | ||
1354 | #define LEC_ARP_REFRESH_INTERVAL (3*HZ) | |
1355 | ||
c4028958 | 1356 | static void lec_arp_check_expire(struct work_struct *work); |
1da177e4 LT |
1357 | static void lec_arp_expire_arp(unsigned long data); |
1358 | ||
f7d57453 | 1359 | /* |
1da177e4 LT |
1360 | * Arp table funcs |
1361 | */ | |
1362 | ||
c48192a7 | 1363 | #define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE - 1)) |
1da177e4 LT |
1364 | |
1365 | /* | |
1366 | * Initialization of arp-cache | |
1367 | */ | |
1fa9961d | 1368 | static void lec_arp_init(struct lec_priv *priv) |
1da177e4 | 1369 | { |
1fa9961d | 1370 | unsigned short i; |
1da177e4 | 1371 | |
c48192a7 | 1372 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) |
d0732f64 | 1373 | INIT_HLIST_HEAD(&priv->lec_arp_tables[i]); |
f7d57453 YH |
1374 | INIT_HLIST_HEAD(&priv->lec_arp_empty_ones); |
1375 | INIT_HLIST_HEAD(&priv->lec_no_forward); | |
1376 | INIT_HLIST_HEAD(&priv->mcast_fwds); | |
1da177e4 | 1377 | spin_lock_init(&priv->lec_arp_lock); |
c4028958 | 1378 | INIT_DELAYED_WORK(&priv->lec_arp_work, lec_arp_check_expire); |
987e46bd | 1379 | schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL); |
1da177e4 LT |
1380 | } |
1381 | ||
1fa9961d | 1382 | static void lec_arp_clear_vccs(struct lec_arp_table *entry) |
1da177e4 | 1383 | { |
1fa9961d | 1384 | if (entry->vcc) { |
1da177e4 LT |
1385 | struct atm_vcc *vcc = entry->vcc; |
1386 | struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); | |
1fa9961d | 1387 | struct net_device *dev = (struct net_device *)vcc->proto_data; |
1da177e4 | 1388 | |
1fa9961d | 1389 | vcc->pop = vpriv->old_pop; |
1da177e4 LT |
1390 | if (vpriv->xoff) |
1391 | netif_wake_queue(dev); | |
1392 | kfree(vpriv); | |
1393 | vcc->user_back = NULL; | |
1fa9961d | 1394 | vcc->push = entry->old_push; |
1da177e4 | 1395 | vcc_release_async(vcc, -EPIPE); |
d0732f64 | 1396 | entry->vcc = NULL; |
1fa9961d CW |
1397 | } |
1398 | if (entry->recv_vcc) { | |
1399 | entry->recv_vcc->push = entry->old_recv_push; | |
1da177e4 | 1400 | vcc_release_async(entry->recv_vcc, -EPIPE); |
1fa9961d CW |
1401 | entry->recv_vcc = NULL; |
1402 | } | |
1da177e4 LT |
1403 | } |
1404 | ||
1405 | /* | |
1406 | * Insert entry to lec_arp_table | |
1407 | * LANE2: Add to the end of the list to satisfy 8.1.13 | |
1408 | */ | |
1fa9961d | 1409 | static inline void |
d0732f64 | 1410 | lec_arp_add(struct lec_priv *priv, struct lec_arp_table *entry) |
1da177e4 | 1411 | { |
d0732f64 | 1412 | struct hlist_head *tmp; |
1fa9961d | 1413 | |
d0732f64 CW |
1414 | tmp = &priv->lec_arp_tables[HASH(entry->mac_addr[ETH_ALEN - 1])]; |
1415 | hlist_add_head(&entry->next, tmp); | |
1fa9961d | 1416 | |
99824461 | 1417 | pr_debug("Added entry:%pM\n", entry->mac_addr); |
1da177e4 LT |
1418 | } |
1419 | ||
1420 | /* | |
1421 | * Remove entry from lec_arp_table | |
1422 | */ | |
1fa9961d CW |
1423 | static int |
1424 | lec_arp_remove(struct lec_priv *priv, struct lec_arp_table *to_remove) | |
1da177e4 | 1425 | { |
d0732f64 CW |
1426 | struct hlist_node *node; |
1427 | struct lec_arp_table *entry; | |
1428 | int i, remove_vcc = 1; | |
1fa9961d | 1429 | |
c48192a7 | 1430 | if (!to_remove) |
1fa9961d | 1431 | return -1; |
d0732f64 CW |
1432 | |
1433 | hlist_del(&to_remove->next); | |
1fa9961d CW |
1434 | del_timer(&to_remove->timer); |
1435 | ||
c48192a7 JP |
1436 | /* |
1437 | * If this is the only MAC connected to this VCC, | |
1438 | * also tear down the VCC | |
1439 | */ | |
1fa9961d CW |
1440 | if (to_remove->status >= ESI_FLUSH_PENDING) { |
1441 | /* | |
1442 | * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT | |
1443 | */ | |
d0732f64 | 1444 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
c48192a7 JP |
1445 | hlist_for_each_entry(entry, node, |
1446 | &priv->lec_arp_tables[i], next) { | |
d0732f64 CW |
1447 | if (memcmp(to_remove->atm_addr, |
1448 | entry->atm_addr, ATM_ESA_LEN) == 0) { | |
1fa9961d CW |
1449 | remove_vcc = 0; |
1450 | break; | |
1451 | } | |
1452 | } | |
1453 | } | |
1454 | if (remove_vcc) | |
1455 | lec_arp_clear_vccs(to_remove); | |
1456 | } | |
1457 | skb_queue_purge(&to_remove->tx_wait); /* FIXME: good place for this? */ | |
1458 | ||
99824461 | 1459 | pr_debug("Removed entry:%pM\n", to_remove->mac_addr); |
1fa9961d | 1460 | return 0; |
1da177e4 LT |
1461 | } |
1462 | ||
1463 | #if DEBUG_ARP_TABLE | |
36cbd3dc | 1464 | static const char *get_status_string(unsigned char st) |
1da177e4 | 1465 | { |
1fa9961d CW |
1466 | switch (st) { |
1467 | case ESI_UNKNOWN: | |
1468 | return "ESI_UNKNOWN"; | |
1469 | case ESI_ARP_PENDING: | |
1470 | return "ESI_ARP_PENDING"; | |
1471 | case ESI_VC_PENDING: | |
1472 | return "ESI_VC_PENDING"; | |
1473 | case ESI_FLUSH_PENDING: | |
1474 | return "ESI_FLUSH_PENDING"; | |
1475 | case ESI_FORWARD_DIRECT: | |
1476 | return "ESI_FORWARD_DIRECT"; | |
1fa9961d | 1477 | } |
c48192a7 | 1478 | return "<UNKNOWN>"; |
1da177e4 | 1479 | } |
1da177e4 | 1480 | |
1fa9961d | 1481 | static void dump_arp_table(struct lec_priv *priv) |
1da177e4 | 1482 | { |
d0732f64 | 1483 | struct hlist_node *node; |
1fa9961d | 1484 | struct lec_arp_table *rulla; |
d0732f64 CW |
1485 | char buf[256]; |
1486 | int i, j, offset; | |
1fa9961d | 1487 | |
c48192a7 | 1488 | pr_info("Dump %p:\n", priv); |
1fa9961d | 1489 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
c48192a7 JP |
1490 | hlist_for_each_entry(rulla, node, |
1491 | &priv->lec_arp_tables[i], next) { | |
d0732f64 CW |
1492 | offset = 0; |
1493 | offset += sprintf(buf, "%d: %p\n", i, rulla); | |
c48192a7 JP |
1494 | offset += sprintf(buf + offset, "Mac: %pM", |
1495 | rulla->mac_addr); | |
1496 | offset += sprintf(buf + offset, " Atm:"); | |
1fa9961d CW |
1497 | for (j = 0; j < ATM_ESA_LEN; j++) { |
1498 | offset += sprintf(buf + offset, | |
1499 | "%2.2x ", | |
1500 | rulla->atm_addr[j] & 0xff); | |
1501 | } | |
1502 | offset += sprintf(buf + offset, | |
1503 | "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", | |
1504 | rulla->vcc ? rulla->vcc->vpi : 0, | |
1505 | rulla->vcc ? rulla->vcc->vci : 0, | |
1506 | rulla->recv_vcc ? rulla->recv_vcc-> | |
1507 | vpi : 0, | |
1508 | rulla->recv_vcc ? rulla->recv_vcc-> | |
1509 | vci : 0, rulla->last_used, | |
1510 | rulla->timestamp, rulla->no_tries); | |
1511 | offset += | |
1512 | sprintf(buf + offset, | |
1513 | "Flags:%x, Packets_flooded:%x, Status: %s ", | |
1514 | rulla->flags, rulla->packets_flooded, | |
1515 | get_status_string(rulla->status)); | |
c48192a7 | 1516 | pr_info("%s\n", buf); |
1fa9961d | 1517 | } |
1fa9961d | 1518 | } |
d0732f64 CW |
1519 | |
1520 | if (!hlist_empty(&priv->lec_no_forward)) | |
c48192a7 | 1521 | pr_info("No forward\n"); |
d0732f64 | 1522 | hlist_for_each_entry(rulla, node, &priv->lec_no_forward, next) { |
1fa9961d | 1523 | offset = 0; |
c48192a7 JP |
1524 | offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr); |
1525 | offset += sprintf(buf + offset, " Atm:"); | |
1fa9961d CW |
1526 | for (j = 0; j < ATM_ESA_LEN; j++) { |
1527 | offset += sprintf(buf + offset, "%2.2x ", | |
1528 | rulla->atm_addr[j] & 0xff); | |
1529 | } | |
1530 | offset += sprintf(buf + offset, | |
1531 | "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", | |
1532 | rulla->vcc ? rulla->vcc->vpi : 0, | |
1533 | rulla->vcc ? rulla->vcc->vci : 0, | |
1534 | rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, | |
1535 | rulla->recv_vcc ? rulla->recv_vcc->vci : 0, | |
1536 | rulla->last_used, | |
1537 | rulla->timestamp, rulla->no_tries); | |
1538 | offset += sprintf(buf + offset, | |
1539 | "Flags:%x, Packets_flooded:%x, Status: %s ", | |
1540 | rulla->flags, rulla->packets_flooded, | |
1541 | get_status_string(rulla->status)); | |
c48192a7 | 1542 | pr_info("%s\n", buf); |
1fa9961d | 1543 | } |
d0732f64 CW |
1544 | |
1545 | if (!hlist_empty(&priv->lec_arp_empty_ones)) | |
c48192a7 | 1546 | pr_info("Empty ones\n"); |
d0732f64 | 1547 | hlist_for_each_entry(rulla, node, &priv->lec_arp_empty_ones, next) { |
1fa9961d | 1548 | offset = 0; |
c48192a7 JP |
1549 | offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr); |
1550 | offset += sprintf(buf + offset, " Atm:"); | |
1fa9961d CW |
1551 | for (j = 0; j < ATM_ESA_LEN; j++) { |
1552 | offset += sprintf(buf + offset, "%2.2x ", | |
1553 | rulla->atm_addr[j] & 0xff); | |
1554 | } | |
1555 | offset += sprintf(buf + offset, | |
1556 | "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", | |
1557 | rulla->vcc ? rulla->vcc->vpi : 0, | |
1558 | rulla->vcc ? rulla->vcc->vci : 0, | |
1559 | rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, | |
1560 | rulla->recv_vcc ? rulla->recv_vcc->vci : 0, | |
1561 | rulla->last_used, | |
1562 | rulla->timestamp, rulla->no_tries); | |
1563 | offset += sprintf(buf + offset, | |
1564 | "Flags:%x, Packets_flooded:%x, Status: %s ", | |
1565 | rulla->flags, rulla->packets_flooded, | |
1566 | get_status_string(rulla->status)); | |
c48192a7 | 1567 | pr_info("%s", buf); |
1fa9961d CW |
1568 | } |
1569 | ||
d0732f64 | 1570 | if (!hlist_empty(&priv->mcast_fwds)) |
c48192a7 | 1571 | pr_info("Multicast Forward VCCs\n"); |
d0732f64 | 1572 | hlist_for_each_entry(rulla, node, &priv->mcast_fwds, next) { |
1fa9961d | 1573 | offset = 0; |
c48192a7 JP |
1574 | offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr); |
1575 | offset += sprintf(buf + offset, " Atm:"); | |
1fa9961d CW |
1576 | for (j = 0; j < ATM_ESA_LEN; j++) { |
1577 | offset += sprintf(buf + offset, "%2.2x ", | |
1578 | rulla->atm_addr[j] & 0xff); | |
1579 | } | |
1580 | offset += sprintf(buf + offset, | |
1581 | "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", | |
1582 | rulla->vcc ? rulla->vcc->vpi : 0, | |
1583 | rulla->vcc ? rulla->vcc->vci : 0, | |
1584 | rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, | |
1585 | rulla->recv_vcc ? rulla->recv_vcc->vci : 0, | |
1586 | rulla->last_used, | |
1587 | rulla->timestamp, rulla->no_tries); | |
1588 | offset += sprintf(buf + offset, | |
1589 | "Flags:%x, Packets_flooded:%x, Status: %s ", | |
1590 | rulla->flags, rulla->packets_flooded, | |
1591 | get_status_string(rulla->status)); | |
c48192a7 | 1592 | pr_info("%s\n", buf); |
1fa9961d | 1593 | } |
1da177e4 | 1594 | |
1da177e4 | 1595 | } |
d0732f64 CW |
1596 | #else |
1597 | #define dump_arp_table(priv) do { } while (0) | |
1598 | #endif | |
1da177e4 LT |
1599 | |
1600 | /* | |
1601 | * Destruction of arp-cache | |
1602 | */ | |
1fa9961d | 1603 | static void lec_arp_destroy(struct lec_priv *priv) |
1da177e4 LT |
1604 | { |
1605 | unsigned long flags; | |
d0732f64 CW |
1606 | struct hlist_node *node, *next; |
1607 | struct lec_arp_table *entry; | |
1fa9961d CW |
1608 | int i; |
1609 | ||
afe2c511 | 1610 | cancel_delayed_work_sync(&priv->lec_arp_work); |
1da177e4 | 1611 | |
1fa9961d CW |
1612 | /* |
1613 | * Remove all entries | |
1614 | */ | |
1da177e4 LT |
1615 | |
1616 | spin_lock_irqsave(&priv->lec_arp_lock, flags); | |
1fa9961d | 1617 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
c48192a7 JP |
1618 | hlist_for_each_entry_safe(entry, node, next, |
1619 | &priv->lec_arp_tables[i], next) { | |
1fa9961d | 1620 | lec_arp_remove(priv, entry); |
33a9c2d4 | 1621 | lec_arp_put(entry); |
1fa9961d | 1622 | } |
d0732f64 | 1623 | INIT_HLIST_HEAD(&priv->lec_arp_tables[i]); |
1fa9961d | 1624 | } |
d0732f64 | 1625 | |
c48192a7 JP |
1626 | hlist_for_each_entry_safe(entry, node, next, |
1627 | &priv->lec_arp_empty_ones, next) { | |
1fa9961d CW |
1628 | del_timer_sync(&entry->timer); |
1629 | lec_arp_clear_vccs(entry); | |
d0732f64 | 1630 | hlist_del(&entry->next); |
33a9c2d4 | 1631 | lec_arp_put(entry); |
1fa9961d | 1632 | } |
d0732f64 CW |
1633 | INIT_HLIST_HEAD(&priv->lec_arp_empty_ones); |
1634 | ||
c48192a7 JP |
1635 | hlist_for_each_entry_safe(entry, node, next, |
1636 | &priv->lec_no_forward, next) { | |
1fa9961d CW |
1637 | del_timer_sync(&entry->timer); |
1638 | lec_arp_clear_vccs(entry); | |
d0732f64 | 1639 | hlist_del(&entry->next); |
33a9c2d4 | 1640 | lec_arp_put(entry); |
1fa9961d | 1641 | } |
d0732f64 CW |
1642 | INIT_HLIST_HEAD(&priv->lec_no_forward); |
1643 | ||
1644 | hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) { | |
1fa9961d CW |
1645 | /* No timer, LANEv2 7.1.20 and 2.3.5.3 */ |
1646 | lec_arp_clear_vccs(entry); | |
d0732f64 | 1647 | hlist_del(&entry->next); |
33a9c2d4 | 1648 | lec_arp_put(entry); |
1fa9961d | 1649 | } |
d0732f64 | 1650 | INIT_HLIST_HEAD(&priv->mcast_fwds); |
1fa9961d | 1651 | priv->mcast_vcc = NULL; |
1da177e4 LT |
1652 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
1653 | } | |
1654 | ||
f7d57453 | 1655 | /* |
1da177e4 LT |
1656 | * Find entry by mac_address |
1657 | */ | |
1fa9961d | 1658 | static struct lec_arp_table *lec_arp_find(struct lec_priv *priv, |
61c33e01 | 1659 | const unsigned char *mac_addr) |
1da177e4 | 1660 | { |
d0732f64 CW |
1661 | struct hlist_node *node; |
1662 | struct hlist_head *head; | |
1663 | struct lec_arp_table *entry; | |
1fa9961d | 1664 | |
99824461 | 1665 | pr_debug("%pM\n", mac_addr); |
1fa9961d | 1666 | |
d0732f64 CW |
1667 | head = &priv->lec_arp_tables[HASH(mac_addr[ETH_ALEN - 1])]; |
1668 | hlist_for_each_entry(entry, node, head, next) { | |
c48192a7 | 1669 | if (!compare_ether_addr(mac_addr, entry->mac_addr)) |
d0732f64 | 1670 | return entry; |
1fa9961d CW |
1671 | } |
1672 | return NULL; | |
1da177e4 LT |
1673 | } |
1674 | ||
1fa9961d | 1675 | static struct lec_arp_table *make_entry(struct lec_priv *priv, |
61c33e01 | 1676 | const unsigned char *mac_addr) |
1da177e4 | 1677 | { |
1fa9961d CW |
1678 | struct lec_arp_table *to_return; |
1679 | ||
1680 | to_return = kzalloc(sizeof(struct lec_arp_table), GFP_ATOMIC); | |
1681 | if (!to_return) { | |
c48192a7 | 1682 | pr_info("LEC: Arp entry kmalloc failed\n"); |
1fa9961d CW |
1683 | return NULL; |
1684 | } | |
1685 | memcpy(to_return->mac_addr, mac_addr, ETH_ALEN); | |
d0732f64 | 1686 | INIT_HLIST_NODE(&to_return->next); |
b24b8a24 PE |
1687 | setup_timer(&to_return->timer, lec_arp_expire_arp, |
1688 | (unsigned long)to_return); | |
1fa9961d CW |
1689 | to_return->last_used = jiffies; |
1690 | to_return->priv = priv; | |
1691 | skb_queue_head_init(&to_return->tx_wait); | |
33a9c2d4 | 1692 | atomic_set(&to_return->usage, 1); |
1fa9961d | 1693 | return to_return; |
1da177e4 LT |
1694 | } |
1695 | ||
1fa9961d CW |
1696 | /* Arp sent timer expired */ |
1697 | static void lec_arp_expire_arp(unsigned long data) | |
1da177e4 | 1698 | { |
1fa9961d CW |
1699 | struct lec_arp_table *entry; |
1700 | ||
1701 | entry = (struct lec_arp_table *)data; | |
1702 | ||
99824461 | 1703 | pr_debug("\n"); |
1fa9961d CW |
1704 | if (entry->status == ESI_ARP_PENDING) { |
1705 | if (entry->no_tries <= entry->priv->max_retry_count) { | |
1706 | if (entry->is_rdesc) | |
1707 | send_to_lecd(entry->priv, l_rdesc_arp_xmt, | |
1708 | entry->mac_addr, NULL, NULL); | |
1709 | else | |
1710 | send_to_lecd(entry->priv, l_arp_xmt, | |
1711 | entry->mac_addr, NULL, NULL); | |
1712 | entry->no_tries++; | |
1713 | } | |
1714 | mod_timer(&entry->timer, jiffies + (1 * HZ)); | |
1715 | } | |
1da177e4 LT |
1716 | } |
1717 | ||
1fa9961d CW |
1718 | /* Unknown/unused vcc expire, remove associated entry */ |
1719 | static void lec_arp_expire_vcc(unsigned long data) | |
1da177e4 LT |
1720 | { |
1721 | unsigned long flags; | |
1fa9961d CW |
1722 | struct lec_arp_table *to_remove = (struct lec_arp_table *)data; |
1723 | struct lec_priv *priv = (struct lec_priv *)to_remove->priv; | |
1da177e4 | 1724 | |
1fa9961d | 1725 | del_timer(&to_remove->timer); |
1da177e4 | 1726 | |
99824461 JP |
1727 | pr_debug("%p %p: vpi:%d vci:%d\n", |
1728 | to_remove, priv, | |
1729 | to_remove->vcc ? to_remove->recv_vcc->vpi : 0, | |
1730 | to_remove->vcc ? to_remove->recv_vcc->vci : 0); | |
1da177e4 LT |
1731 | |
1732 | spin_lock_irqsave(&priv->lec_arp_lock, flags); | |
d0732f64 | 1733 | hlist_del(&to_remove->next); |
1da177e4 LT |
1734 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
1735 | ||
1fa9961d | 1736 | lec_arp_clear_vccs(to_remove); |
33a9c2d4 | 1737 | lec_arp_put(to_remove); |
1da177e4 LT |
1738 | } |
1739 | ||
b4c84ec0 JP |
1740 | static bool __lec_arp_check_expire(struct lec_arp_table *entry, |
1741 | unsigned long now, | |
1742 | struct lec_priv *priv) | |
1743 | { | |
1744 | unsigned long time_to_check; | |
1745 | ||
1746 | if ((entry->flags) & LEC_REMOTE_FLAG && priv->topology_change) | |
1747 | time_to_check = priv->forward_delay_time; | |
1748 | else | |
1749 | time_to_check = priv->aging_time; | |
1750 | ||
1751 | pr_debug("About to expire: %lx - %lx > %lx\n", | |
1752 | now, entry->last_used, time_to_check); | |
1753 | if (time_after(now, entry->last_used + time_to_check) && | |
1754 | !(entry->flags & LEC_PERMANENT_FLAG) && | |
1755 | !(entry->mac_addr[0] & 0x01)) { /* LANE2: 7.1.20 */ | |
1756 | /* Remove entry */ | |
1757 | pr_debug("Entry timed out\n"); | |
1758 | lec_arp_remove(priv, entry); | |
1759 | lec_arp_put(entry); | |
1760 | } else { | |
1761 | /* Something else */ | |
1762 | if ((entry->status == ESI_VC_PENDING || | |
1763 | entry->status == ESI_ARP_PENDING) && | |
1764 | time_after_eq(now, entry->timestamp + | |
1765 | priv->max_unknown_frame_time)) { | |
1766 | entry->timestamp = jiffies; | |
1767 | entry->packets_flooded = 0; | |
1768 | if (entry->status == ESI_VC_PENDING) | |
1769 | send_to_lecd(priv, l_svc_setup, | |
1770 | entry->mac_addr, | |
1771 | entry->atm_addr, | |
1772 | NULL); | |
1773 | } | |
1774 | if (entry->status == ESI_FLUSH_PENDING && | |
1775 | time_after_eq(now, entry->timestamp + | |
1776 | priv->path_switching_delay)) { | |
1777 | lec_arp_hold(entry); | |
1778 | return true; | |
1779 | } | |
1780 | } | |
1781 | ||
1782 | return false; | |
1783 | } | |
1da177e4 LT |
1784 | /* |
1785 | * Expire entries. | |
1786 | * 1. Re-set timer | |
1787 | * 2. For each entry, delete entries that have aged past the age limit. | |
1788 | * 3. For each entry, depending on the status of the entry, perform | |
1789 | * the following maintenance. | |
1790 | * a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the | |
1791 | * tick_count is above the max_unknown_frame_time, clear | |
1792 | * the tick_count to zero and clear the packets_flooded counter | |
1793 | * to zero. This supports the packet rate limit per address | |
1794 | * while flooding unknowns. | |
1795 | * b. If the status is ESI_FLUSH_PENDING and the tick_count is greater | |
1796 | * than or equal to the path_switching_delay, change the status | |
1797 | * to ESI_FORWARD_DIRECT. This causes the flush period to end | |
1798 | * regardless of the progress of the flush protocol. | |
1799 | */ | |
c4028958 | 1800 | static void lec_arp_check_expire(struct work_struct *work) |
1da177e4 LT |
1801 | { |
1802 | unsigned long flags; | |
c4028958 DH |
1803 | struct lec_priv *priv = |
1804 | container_of(work, struct lec_priv, lec_arp_work.work); | |
d0732f64 CW |
1805 | struct hlist_node *node, *next; |
1806 | struct lec_arp_table *entry; | |
1fa9961d | 1807 | unsigned long now; |
1fa9961d CW |
1808 | int i; |
1809 | ||
99824461 | 1810 | pr_debug("%p\n", priv); |
1da177e4 | 1811 | now = jiffies; |
6656e3c4 | 1812 | restart: |
1da177e4 | 1813 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
1fa9961d | 1814 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
c48192a7 JP |
1815 | hlist_for_each_entry_safe(entry, node, next, |
1816 | &priv->lec_arp_tables[i], next) { | |
b4c84ec0 JP |
1817 | if (__lec_arp_check_expire(entry, now, priv)) { |
1818 | struct sk_buff *skb; | |
1819 | struct atm_vcc *vcc = entry->vcc; | |
1820 | ||
1821 | spin_unlock_irqrestore(&priv->lec_arp_lock, | |
1822 | flags); | |
1823 | while ((skb = skb_dequeue(&entry->tx_wait))) | |
1824 | lec_send(vcc, skb); | |
1825 | entry->last_used = jiffies; | |
1826 | entry->status = ESI_FORWARD_DIRECT; | |
33a9c2d4 | 1827 | lec_arp_put(entry); |
b4c84ec0 JP |
1828 | |
1829 | goto restart; | |
1da177e4 LT |
1830 | } |
1831 | } | |
1832 | } | |
1833 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); | |
1834 | ||
987e46bd | 1835 | schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL); |
1da177e4 | 1836 | } |
1fa9961d | 1837 | |
1da177e4 LT |
1838 | /* |
1839 | * Try to find vcc where mac_address is attached. | |
f7d57453 | 1840 | * |
1da177e4 | 1841 | */ |
1fa9961d | 1842 | static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv, |
c48192a7 JP |
1843 | const unsigned char *mac_to_find, |
1844 | int is_rdesc, | |
1fa9961d | 1845 | struct lec_arp_table **ret_entry) |
1da177e4 LT |
1846 | { |
1847 | unsigned long flags; | |
1fa9961d | 1848 | struct lec_arp_table *entry; |
1da177e4 LT |
1849 | struct atm_vcc *found; |
1850 | ||
1fa9961d CW |
1851 | if (mac_to_find[0] & 0x01) { |
1852 | switch (priv->lane_version) { | |
1853 | case 1: | |
1854 | return priv->mcast_vcc; | |
1fa9961d CW |
1855 | case 2: /* LANE2 wants arp for multicast addresses */ |
1856 | if (!compare_ether_addr(mac_to_find, bus_mac)) | |
1857 | return priv->mcast_vcc; | |
1858 | break; | |
1859 | default: | |
1860 | break; | |
1861 | } | |
1862 | } | |
1da177e4 LT |
1863 | |
1864 | spin_lock_irqsave(&priv->lec_arp_lock, flags); | |
1fa9961d CW |
1865 | entry = lec_arp_find(priv, mac_to_find); |
1866 | ||
1867 | if (entry) { | |
1868 | if (entry->status == ESI_FORWARD_DIRECT) { | |
1869 | /* Connection Ok */ | |
1870 | entry->last_used = jiffies; | |
6656e3c4 | 1871 | lec_arp_hold(entry); |
1fa9961d CW |
1872 | *ret_entry = entry; |
1873 | found = entry->vcc; | |
1da177e4 | 1874 | goto out; |
1fa9961d CW |
1875 | } |
1876 | /* | |
1877 | * If the LE_ARP cache entry is still pending, reset count to 0 | |
75b895c1 ST |
1878 | * so another LE_ARP request can be made for this frame. |
1879 | */ | |
c48192a7 | 1880 | if (entry->status == ESI_ARP_PENDING) |
75b895c1 | 1881 | entry->no_tries = 0; |
1fa9961d CW |
1882 | /* |
1883 | * Data direct VC not yet set up, check to see if the unknown | |
1884 | * frame count is greater than the limit. If the limit has | |
1885 | * not been reached, allow the caller to send packet to | |
1886 | * BUS. | |
1887 | */ | |
1888 | if (entry->status != ESI_FLUSH_PENDING && | |
1889 | entry->packets_flooded < | |
1890 | priv->maximum_unknown_frame_count) { | |
1891 | entry->packets_flooded++; | |
99824461 | 1892 | pr_debug("Flooding..\n"); |
1fa9961d | 1893 | found = priv->mcast_vcc; |
1da177e4 | 1894 | goto out; |
1fa9961d CW |
1895 | } |
1896 | /* | |
1897 | * We got here because entry->status == ESI_FLUSH_PENDING | |
1da177e4 LT |
1898 | * or BUS flood limit was reached for an entry which is |
1899 | * in ESI_ARP_PENDING or ESI_VC_PENDING state. | |
1900 | */ | |
6656e3c4 | 1901 | lec_arp_hold(entry); |
1fa9961d | 1902 | *ret_entry = entry; |
99824461 JP |
1903 | pr_debug("entry->status %d entry->vcc %p\n", entry->status, |
1904 | entry->vcc); | |
1fa9961d CW |
1905 | found = NULL; |
1906 | } else { | |
1907 | /* No matching entry was found */ | |
1908 | entry = make_entry(priv, mac_to_find); | |
99824461 | 1909 | pr_debug("Making entry\n"); |
1fa9961d CW |
1910 | if (!entry) { |
1911 | found = priv->mcast_vcc; | |
1da177e4 | 1912 | goto out; |
1fa9961d CW |
1913 | } |
1914 | lec_arp_add(priv, entry); | |
1915 | /* We want arp-request(s) to be sent */ | |
1916 | entry->packets_flooded = 1; | |
1917 | entry->status = ESI_ARP_PENDING; | |
1918 | entry->no_tries = 1; | |
1919 | entry->last_used = entry->timestamp = jiffies; | |
1920 | entry->is_rdesc = is_rdesc; | |
1921 | if (entry->is_rdesc) | |
1922 | send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL, | |
1923 | NULL); | |
1924 | else | |
1925 | send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL); | |
1926 | entry->timer.expires = jiffies + (1 * HZ); | |
1927 | entry->timer.function = lec_arp_expire_arp; | |
1928 | add_timer(&entry->timer); | |
1929 | found = priv->mcast_vcc; | |
1930 | } | |
1da177e4 LT |
1931 | |
1932 | out: | |
1933 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); | |
1934 | return found; | |
1935 | } | |
1936 | ||
1937 | static int | |
61c33e01 | 1938 | lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr, |
1fa9961d | 1939 | unsigned long permanent) |
1da177e4 LT |
1940 | { |
1941 | unsigned long flags; | |
d0732f64 CW |
1942 | struct hlist_node *node, *next; |
1943 | struct lec_arp_table *entry; | |
1fa9961d | 1944 | int i; |
1da177e4 | 1945 | |
99824461 | 1946 | pr_debug("\n"); |
1da177e4 | 1947 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
1fa9961d | 1948 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
c48192a7 JP |
1949 | hlist_for_each_entry_safe(entry, node, next, |
1950 | &priv->lec_arp_tables[i], next) { | |
1951 | if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN) && | |
1952 | (permanent || | |
1953 | !(entry->flags & LEC_PERMANENT_FLAG))) { | |
1da177e4 | 1954 | lec_arp_remove(priv, entry); |
33a9c2d4 | 1955 | lec_arp_put(entry); |
1fa9961d | 1956 | } |
1da177e4 | 1957 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
1fa9961d CW |
1958 | return 0; |
1959 | } | |
1960 | } | |
1da177e4 | 1961 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
1fa9961d | 1962 | return -1; |
1da177e4 LT |
1963 | } |
1964 | ||
1965 | /* | |
f7d57453 | 1966 | * Notifies: Response to arp_request (atm_addr != NULL) |
1da177e4 LT |
1967 | */ |
1968 | static void | |
61c33e01 MBJ |
1969 | lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr, |
1970 | const unsigned char *atm_addr, unsigned long remoteflag, | |
1fa9961d | 1971 | unsigned int targetless_le_arp) |
1da177e4 LT |
1972 | { |
1973 | unsigned long flags; | |
d0732f64 | 1974 | struct hlist_node *node, *next; |
1fa9961d CW |
1975 | struct lec_arp_table *entry, *tmp; |
1976 | int i; | |
1da177e4 | 1977 | |
99824461 JP |
1978 | pr_debug("%smac:%pM\n", |
1979 | (targetless_le_arp) ? "targetless " : "", mac_addr); | |
1da177e4 LT |
1980 | |
1981 | spin_lock_irqsave(&priv->lec_arp_lock, flags); | |
1fa9961d CW |
1982 | entry = lec_arp_find(priv, mac_addr); |
1983 | if (entry == NULL && targetless_le_arp) | |
1984 | goto out; /* | |
1985 | * LANE2: ignore targetless LE_ARPs for which | |
1986 | * we have no entry in the cache. 7.1.30 | |
1987 | */ | |
d0732f64 | 1988 | if (!hlist_empty(&priv->lec_arp_empty_ones)) { |
c48192a7 JP |
1989 | hlist_for_each_entry_safe(entry, node, next, |
1990 | &priv->lec_arp_empty_ones, next) { | |
d0732f64 CW |
1991 | if (memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN) == 0) { |
1992 | hlist_del(&entry->next); | |
1fa9961d | 1993 | del_timer(&entry->timer); |
d0732f64 CW |
1994 | tmp = lec_arp_find(priv, mac_addr); |
1995 | if (tmp) { | |
1996 | del_timer(&tmp->timer); | |
1997 | tmp->status = ESI_FORWARD_DIRECT; | |
1998 | memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN); | |
1999 | tmp->vcc = entry->vcc; | |
2000 | tmp->old_push = entry->old_push; | |
2001 | tmp->last_used = jiffies; | |
2002 | del_timer(&entry->timer); | |
33a9c2d4 | 2003 | lec_arp_put(entry); |
d0732f64 CW |
2004 | entry = tmp; |
2005 | } else { | |
2006 | entry->status = ESI_FORWARD_DIRECT; | |
2007 | memcpy(entry->mac_addr, mac_addr, ETH_ALEN); | |
2008 | entry->last_used = jiffies; | |
2009 | lec_arp_add(priv, entry); | |
2010 | } | |
2011 | if (remoteflag) | |
2012 | entry->flags |= LEC_REMOTE_FLAG; | |
2013 | else | |
2014 | entry->flags &= ~LEC_REMOTE_FLAG; | |
52240062 | 2015 | pr_debug("After update\n"); |
d0732f64 CW |
2016 | dump_arp_table(priv); |
2017 | goto out; | |
1fa9961d | 2018 | } |
1fa9961d CW |
2019 | } |
2020 | } | |
d0732f64 | 2021 | |
1fa9961d CW |
2022 | entry = lec_arp_find(priv, mac_addr); |
2023 | if (!entry) { | |
2024 | entry = make_entry(priv, mac_addr); | |
2025 | if (!entry) | |
2026 | goto out; | |
2027 | entry->status = ESI_UNKNOWN; | |
2028 | lec_arp_add(priv, entry); | |
2029 | /* Temporary, changes before end of function */ | |
2030 | } | |
2031 | memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN); | |
2032 | del_timer(&entry->timer); | |
2033 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { | |
c48192a7 JP |
2034 | hlist_for_each_entry(tmp, node, |
2035 | &priv->lec_arp_tables[i], next) { | |
1fa9961d CW |
2036 | if (entry != tmp && |
2037 | !memcmp(tmp->atm_addr, atm_addr, ATM_ESA_LEN)) { | |
2038 | /* Vcc to this host exists */ | |
2039 | if (tmp->status > ESI_VC_PENDING) { | |
2040 | /* | |
2041 | * ESI_FLUSH_PENDING, | |
2042 | * ESI_FORWARD_DIRECT | |
2043 | */ | |
2044 | entry->vcc = tmp->vcc; | |
2045 | entry->old_push = tmp->old_push; | |
2046 | } | |
2047 | entry->status = tmp->status; | |
2048 | break; | |
2049 | } | |
2050 | } | |
2051 | } | |
2052 | if (remoteflag) | |
2053 | entry->flags |= LEC_REMOTE_FLAG; | |
2054 | else | |
2055 | entry->flags &= ~LEC_REMOTE_FLAG; | |
2056 | if (entry->status == ESI_ARP_PENDING || entry->status == ESI_UNKNOWN) { | |
2057 | entry->status = ESI_VC_PENDING; | |
d0732f64 | 2058 | send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL); |
1fa9961d | 2059 | } |
52240062 | 2060 | pr_debug("After update2\n"); |
1fa9961d | 2061 | dump_arp_table(priv); |
1da177e4 LT |
2062 | out: |
2063 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); | |
2064 | } | |
2065 | ||
2066 | /* | |
f7d57453 | 2067 | * Notifies: Vcc setup ready |
1da177e4 LT |
2068 | */ |
2069 | static void | |
61c33e01 | 2070 | lec_vcc_added(struct lec_priv *priv, const struct atmlec_ioc *ioc_data, |
1fa9961d CW |
2071 | struct atm_vcc *vcc, |
2072 | void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb)) | |
1da177e4 LT |
2073 | { |
2074 | unsigned long flags; | |
d0732f64 | 2075 | struct hlist_node *node; |
1fa9961d CW |
2076 | struct lec_arp_table *entry; |
2077 | int i, found_entry = 0; | |
1da177e4 LT |
2078 | |
2079 | spin_lock_irqsave(&priv->lec_arp_lock, flags); | |
c48192a7 | 2080 | /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */ |
1fa9961d | 2081 | if (ioc_data->receive == 2) { |
52240062 | 2082 | pr_debug("LEC_ARP: Attaching mcast forward\n"); |
1da177e4 | 2083 | #if 0 |
1fa9961d CW |
2084 | entry = lec_arp_find(priv, bus_mac); |
2085 | if (!entry) { | |
c48192a7 | 2086 | pr_info("LEC_ARP: Multicast entry not found!\n"); |
1da177e4 | 2087 | goto out; |
1fa9961d CW |
2088 | } |
2089 | memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); | |
2090 | entry->recv_vcc = vcc; | |
2091 | entry->old_recv_push = old_push; | |
1da177e4 | 2092 | #endif |
1fa9961d CW |
2093 | entry = make_entry(priv, bus_mac); |
2094 | if (entry == NULL) | |
1da177e4 | 2095 | goto out; |
1fa9961d CW |
2096 | del_timer(&entry->timer); |
2097 | memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); | |
2098 | entry->recv_vcc = vcc; | |
2099 | entry->old_recv_push = old_push; | |
d0732f64 | 2100 | hlist_add_head(&entry->next, &priv->mcast_fwds); |
1fa9961d CW |
2101 | goto out; |
2102 | } else if (ioc_data->receive == 1) { | |
2103 | /* | |
2104 | * Vcc which we don't want to make default vcc, | |
2105 | * attach it anyway. | |
2106 | */ | |
99824461 JP |
2107 | pr_debug("LEC_ARP:Attaching data direct, not default: %2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n", |
2108 | ioc_data->atm_addr[0], ioc_data->atm_addr[1], | |
2109 | ioc_data->atm_addr[2], ioc_data->atm_addr[3], | |
2110 | ioc_data->atm_addr[4], ioc_data->atm_addr[5], | |
2111 | ioc_data->atm_addr[6], ioc_data->atm_addr[7], | |
2112 | ioc_data->atm_addr[8], ioc_data->atm_addr[9], | |
2113 | ioc_data->atm_addr[10], ioc_data->atm_addr[11], | |
2114 | ioc_data->atm_addr[12], ioc_data->atm_addr[13], | |
2115 | ioc_data->atm_addr[14], ioc_data->atm_addr[15], | |
2116 | ioc_data->atm_addr[16], ioc_data->atm_addr[17], | |
2117 | ioc_data->atm_addr[18], ioc_data->atm_addr[19]); | |
1fa9961d CW |
2118 | entry = make_entry(priv, bus_mac); |
2119 | if (entry == NULL) | |
1da177e4 | 2120 | goto out; |
1fa9961d CW |
2121 | memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); |
2122 | memset(entry->mac_addr, 0, ETH_ALEN); | |
2123 | entry->recv_vcc = vcc; | |
2124 | entry->old_recv_push = old_push; | |
2125 | entry->status = ESI_UNKNOWN; | |
2126 | entry->timer.expires = jiffies + priv->vcc_timeout_period; | |
2127 | entry->timer.function = lec_arp_expire_vcc; | |
d0732f64 | 2128 | hlist_add_head(&entry->next, &priv->lec_no_forward); |
1fa9961d | 2129 | add_timer(&entry->timer); |
1da177e4 LT |
2130 | dump_arp_table(priv); |
2131 | goto out; | |
1fa9961d | 2132 | } |
99824461 JP |
2133 | pr_debug("LEC_ARP:Attaching data direct, default: %2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n", |
2134 | ioc_data->atm_addr[0], ioc_data->atm_addr[1], | |
2135 | ioc_data->atm_addr[2], ioc_data->atm_addr[3], | |
2136 | ioc_data->atm_addr[4], ioc_data->atm_addr[5], | |
2137 | ioc_data->atm_addr[6], ioc_data->atm_addr[7], | |
2138 | ioc_data->atm_addr[8], ioc_data->atm_addr[9], | |
2139 | ioc_data->atm_addr[10], ioc_data->atm_addr[11], | |
2140 | ioc_data->atm_addr[12], ioc_data->atm_addr[13], | |
2141 | ioc_data->atm_addr[14], ioc_data->atm_addr[15], | |
2142 | ioc_data->atm_addr[16], ioc_data->atm_addr[17], | |
2143 | ioc_data->atm_addr[18], ioc_data->atm_addr[19]); | |
1fa9961d | 2144 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
c48192a7 JP |
2145 | hlist_for_each_entry(entry, node, |
2146 | &priv->lec_arp_tables[i], next) { | |
1fa9961d CW |
2147 | if (memcmp |
2148 | (ioc_data->atm_addr, entry->atm_addr, | |
2149 | ATM_ESA_LEN) == 0) { | |
52240062 SH |
2150 | pr_debug("LEC_ARP: Attaching data direct\n"); |
2151 | pr_debug("Currently -> Vcc: %d, Rvcc:%d\n", | |
99824461 JP |
2152 | entry->vcc ? entry->vcc->vci : 0, |
2153 | entry->recv_vcc ? entry->recv_vcc-> | |
2154 | vci : 0); | |
1fa9961d CW |
2155 | found_entry = 1; |
2156 | del_timer(&entry->timer); | |
2157 | entry->vcc = vcc; | |
2158 | entry->old_push = old_push; | |
2159 | if (entry->status == ESI_VC_PENDING) { | |
2160 | if (priv->maximum_unknown_frame_count | |
2161 | == 0) | |
2162 | entry->status = | |
2163 | ESI_FORWARD_DIRECT; | |
2164 | else { | |
2165 | entry->timestamp = jiffies; | |
2166 | entry->status = | |
2167 | ESI_FLUSH_PENDING; | |
1da177e4 | 2168 | #if 0 |
1fa9961d CW |
2169 | send_to_lecd(priv, l_flush_xmt, |
2170 | NULL, | |
2171 | entry->atm_addr, | |
2172 | NULL); | |
1da177e4 | 2173 | #endif |
1fa9961d CW |
2174 | } |
2175 | } else { | |
2176 | /* | |
2177 | * They were forming a connection | |
2178 | * to us, and we to them. Our | |
2179 | * ATM address is numerically lower | |
2180 | * than theirs, so we make connection | |
2181 | * we formed into default VCC (8.1.11). | |
2182 | * Connection they made gets torn | |
2183 | * down. This might confuse some | |
2184 | * clients. Can be changed if | |
2185 | * someone reports trouble... | |
2186 | */ | |
2187 | ; | |
2188 | } | |
2189 | } | |
2190 | } | |
2191 | } | |
2192 | if (found_entry) { | |
52240062 | 2193 | pr_debug("After vcc was added\n"); |
1fa9961d | 2194 | dump_arp_table(priv); |
1da177e4 | 2195 | goto out; |
1fa9961d CW |
2196 | } |
2197 | /* | |
2198 | * Not found, snatch address from first data packet that arrives | |
2199 | * from this vcc | |
2200 | */ | |
2201 | entry = make_entry(priv, bus_mac); | |
2202 | if (!entry) | |
1da177e4 | 2203 | goto out; |
1fa9961d CW |
2204 | entry->vcc = vcc; |
2205 | entry->old_push = old_push; | |
2206 | memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); | |
2207 | memset(entry->mac_addr, 0, ETH_ALEN); | |
2208 | entry->status = ESI_UNKNOWN; | |
d0732f64 | 2209 | hlist_add_head(&entry->next, &priv->lec_arp_empty_ones); |
1fa9961d CW |
2210 | entry->timer.expires = jiffies + priv->vcc_timeout_period; |
2211 | entry->timer.function = lec_arp_expire_vcc; | |
2212 | add_timer(&entry->timer); | |
52240062 | 2213 | pr_debug("After vcc was added\n"); |
1da177e4 LT |
2214 | dump_arp_table(priv); |
2215 | out: | |
2216 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); | |
2217 | } | |
2218 | ||
1fa9961d | 2219 | static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id) |
1da177e4 LT |
2220 | { |
2221 | unsigned long flags; | |
d0732f64 | 2222 | struct hlist_node *node; |
1fa9961d CW |
2223 | struct lec_arp_table *entry; |
2224 | int i; | |
1da177e4 | 2225 | |
99824461 | 2226 | pr_debug("%lx\n", tran_id); |
6656e3c4 | 2227 | restart: |
1fa9961d CW |
2228 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
2229 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { | |
c48192a7 JP |
2230 | hlist_for_each_entry(entry, node, |
2231 | &priv->lec_arp_tables[i], next) { | |
2232 | if (entry->flush_tran_id == tran_id && | |
2233 | entry->status == ESI_FLUSH_PENDING) { | |
1fa9961d | 2234 | struct sk_buff *skb; |
6656e3c4 | 2235 | struct atm_vcc *vcc = entry->vcc; |
1fa9961d | 2236 | |
6656e3c4 | 2237 | lec_arp_hold(entry); |
c48192a7 JP |
2238 | spin_unlock_irqrestore(&priv->lec_arp_lock, |
2239 | flags); | |
b4c84ec0 | 2240 | while ((skb = skb_dequeue(&entry->tx_wait))) |
162619e5 | 2241 | lec_send(vcc, skb); |
6656e3c4 | 2242 | entry->last_used = jiffies; |
1fa9961d | 2243 | entry->status = ESI_FORWARD_DIRECT; |
6656e3c4 | 2244 | lec_arp_put(entry); |
52240062 | 2245 | pr_debug("LEC_ARP: Flushed\n"); |
6656e3c4 | 2246 | goto restart; |
1fa9961d CW |
2247 | } |
2248 | } | |
2249 | } | |
1da177e4 | 2250 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
1fa9961d | 2251 | dump_arp_table(priv); |
1da177e4 LT |
2252 | } |
2253 | ||
2254 | static void | |
2255 | lec_set_flush_tran_id(struct lec_priv *priv, | |
61c33e01 | 2256 | const unsigned char *atm_addr, unsigned long tran_id) |
1da177e4 LT |
2257 | { |
2258 | unsigned long flags; | |
d0732f64 | 2259 | struct hlist_node *node; |
1fa9961d CW |
2260 | struct lec_arp_table *entry; |
2261 | int i; | |
1da177e4 LT |
2262 | |
2263 | spin_lock_irqsave(&priv->lec_arp_lock, flags); | |
1fa9961d | 2264 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) |
c48192a7 JP |
2265 | hlist_for_each_entry(entry, node, |
2266 | &priv->lec_arp_tables[i], next) { | |
1fa9961d CW |
2267 | if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) { |
2268 | entry->flush_tran_id = tran_id; | |
52240062 | 2269 | pr_debug("Set flush transaction id to %lx for %p\n", |
99824461 | 2270 | tran_id, entry); |
1fa9961d | 2271 | } |
d0732f64 | 2272 | } |
1da177e4 LT |
2273 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
2274 | } | |
2275 | ||
1fa9961d | 2276 | static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc) |
1da177e4 LT |
2277 | { |
2278 | unsigned long flags; | |
1fa9961d CW |
2279 | unsigned char mac_addr[] = { |
2280 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff | |
2281 | }; | |
2282 | struct lec_arp_table *to_add; | |
1da177e4 LT |
2283 | struct lec_vcc_priv *vpriv; |
2284 | int err = 0; | |
1fa9961d | 2285 | |
c48192a7 JP |
2286 | vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL); |
2287 | if (!vpriv) | |
1da177e4 LT |
2288 | return -ENOMEM; |
2289 | vpriv->xoff = 0; | |
2290 | vpriv->old_pop = vcc->pop; | |
2291 | vcc->user_back = vpriv; | |
1fa9961d | 2292 | vcc->pop = lec_pop; |
1da177e4 | 2293 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
1fa9961d CW |
2294 | to_add = make_entry(priv, mac_addr); |
2295 | if (!to_add) { | |
1da177e4 LT |
2296 | vcc->pop = vpriv->old_pop; |
2297 | kfree(vpriv); | |
1fa9961d | 2298 | err = -ENOMEM; |
1da177e4 | 2299 | goto out; |
1fa9961d CW |
2300 | } |
2301 | memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN); | |
2302 | to_add->status = ESI_FORWARD_DIRECT; | |
2303 | to_add->flags |= LEC_PERMANENT_FLAG; | |
2304 | to_add->vcc = vcc; | |
2305 | to_add->old_push = vcc->push; | |
2306 | vcc->push = lec_push; | |
2307 | priv->mcast_vcc = vcc; | |
2308 | lec_arp_add(priv, to_add); | |
1da177e4 LT |
2309 | out: |
2310 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); | |
1fa9961d | 2311 | return err; |
1da177e4 LT |
2312 | } |
2313 | ||
1fa9961d | 2314 | static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc) |
1da177e4 LT |
2315 | { |
2316 | unsigned long flags; | |
d0732f64 CW |
2317 | struct hlist_node *node, *next; |
2318 | struct lec_arp_table *entry; | |
1fa9961d | 2319 | int i; |
1da177e4 | 2320 | |
52240062 | 2321 | pr_debug("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n", vcc->vpi, vcc->vci); |
1fa9961d | 2322 | dump_arp_table(priv); |
d0732f64 | 2323 | |
1da177e4 | 2324 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
d0732f64 | 2325 | |
1fa9961d | 2326 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
c48192a7 JP |
2327 | hlist_for_each_entry_safe(entry, node, next, |
2328 | &priv->lec_arp_tables[i], next) { | |
1fa9961d CW |
2329 | if (vcc == entry->vcc) { |
2330 | lec_arp_remove(priv, entry); | |
33a9c2d4 | 2331 | lec_arp_put(entry); |
c48192a7 | 2332 | if (priv->mcast_vcc == vcc) |
1fa9961d | 2333 | priv->mcast_vcc = NULL; |
1fa9961d CW |
2334 | } |
2335 | } | |
2336 | } | |
2337 | ||
c48192a7 JP |
2338 | hlist_for_each_entry_safe(entry, node, next, |
2339 | &priv->lec_arp_empty_ones, next) { | |
d0732f64 | 2340 | if (entry->vcc == vcc) { |
1fa9961d CW |
2341 | lec_arp_clear_vccs(entry); |
2342 | del_timer(&entry->timer); | |
d0732f64 | 2343 | hlist_del(&entry->next); |
33a9c2d4 | 2344 | lec_arp_put(entry); |
1fa9961d | 2345 | } |
1fa9961d CW |
2346 | } |
2347 | ||
c48192a7 JP |
2348 | hlist_for_each_entry_safe(entry, node, next, |
2349 | &priv->lec_no_forward, next) { | |
1fa9961d CW |
2350 | if (entry->recv_vcc == vcc) { |
2351 | lec_arp_clear_vccs(entry); | |
2352 | del_timer(&entry->timer); | |
d0732f64 | 2353 | hlist_del(&entry->next); |
33a9c2d4 | 2354 | lec_arp_put(entry); |
1fa9961d | 2355 | } |
1fa9961d CW |
2356 | } |
2357 | ||
d0732f64 | 2358 | hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) { |
1fa9961d CW |
2359 | if (entry->recv_vcc == vcc) { |
2360 | lec_arp_clear_vccs(entry); | |
2361 | /* No timer, LANEv2 7.1.20 and 2.3.5.3 */ | |
d0732f64 | 2362 | hlist_del(&entry->next); |
33a9c2d4 | 2363 | lec_arp_put(entry); |
1fa9961d | 2364 | } |
1fa9961d | 2365 | } |
1da177e4 LT |
2366 | |
2367 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); | |
2368 | dump_arp_table(priv); | |
2369 | } | |
2370 | ||
2371 | static void | |
2372 | lec_arp_check_empties(struct lec_priv *priv, | |
1fa9961d | 2373 | struct atm_vcc *vcc, struct sk_buff *skb) |
1da177e4 | 2374 | { |
1fa9961d | 2375 | unsigned long flags; |
d0732f64 CW |
2376 | struct hlist_node *node, *next; |
2377 | struct lec_arp_table *entry, *tmp; | |
1fa9961d CW |
2378 | struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data; |
2379 | unsigned char *src; | |
1da177e4 | 2380 | #ifdef CONFIG_TR |
1fa9961d | 2381 | struct lecdatahdr_8025 *tr_hdr = (struct lecdatahdr_8025 *)skb->data; |
1da177e4 | 2382 | |
1fa9961d CW |
2383 | if (priv->is_trdev) |
2384 | src = tr_hdr->h_source; | |
2385 | else | |
1da177e4 | 2386 | #endif |
1fa9961d | 2387 | src = hdr->h_source; |
1da177e4 LT |
2388 | |
2389 | spin_lock_irqsave(&priv->lec_arp_lock, flags); | |
c48192a7 JP |
2390 | hlist_for_each_entry_safe(entry, node, next, |
2391 | &priv->lec_arp_empty_ones, next) { | |
d0732f64 CW |
2392 | if (vcc == entry->vcc) { |
2393 | del_timer(&entry->timer); | |
2394 | memcpy(entry->mac_addr, src, ETH_ALEN); | |
2395 | entry->status = ESI_FORWARD_DIRECT; | |
2396 | entry->last_used = jiffies; | |
2397 | /* We might have got an entry */ | |
c48192a7 JP |
2398 | tmp = lec_arp_find(priv, src); |
2399 | if (tmp) { | |
d0732f64 | 2400 | lec_arp_remove(priv, tmp); |
33a9c2d4 | 2401 | lec_arp_put(tmp); |
d0732f64 CW |
2402 | } |
2403 | hlist_del(&entry->next); | |
2404 | lec_arp_add(priv, entry); | |
2405 | goto out; | |
1fa9961d | 2406 | } |
1fa9961d | 2407 | } |
52240062 | 2408 | pr_debug("LEC_ARP: Arp_check_empties: entry not found!\n"); |
1da177e4 LT |
2409 | out: |
2410 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); | |
2411 | } | |
1fa9961d | 2412 | |
1da177e4 | 2413 | MODULE_LICENSE("GPL"); |