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 | ||
1da177e4 LT |
29 | /* And atm device */ |
30 | #include <linux/atmdev.h> | |
31 | #include <linux/atmlec.h> | |
32 | ||
33 | /* Proxy LEC knows about bridging */ | |
9a81c34a | 34 | #if IS_ENABLED(CONFIG_BRIDGE) |
1da177e4 LT |
35 | #include "../bridge/br_private.h" |
36 | ||
d44f7746 | 37 | static unsigned char bridge_ula_lec[] = { 0x01, 0x80, 0xc2, 0x00, 0x00 }; |
1da177e4 LT |
38 | #endif |
39 | ||
40 | /* Modular too */ | |
41 | #include <linux/module.h> | |
42 | #include <linux/init.h> | |
43 | ||
acf784bd GS |
44 | /* Hardening for Spectre-v1 */ |
45 | #include <linux/nospec.h> | |
46 | ||
1da177e4 LT |
47 | #include "lec.h" |
48 | #include "lec_arpc.h" | |
49 | #include "resources.h" | |
50 | ||
d44f7746 CW |
51 | #define DUMP_PACKETS 0 /* |
52 | * 0 = None, | |
53 | * 1 = 30 first bytes | |
54 | * 2 = Whole packet | |
55 | */ | |
1da177e4 | 56 | |
d44f7746 CW |
57 | #define LEC_UNRES_QUE_LEN 8 /* |
58 | * number of tx packets to queue for a | |
59 | * single destination while waiting for SVC | |
60 | */ | |
1da177e4 LT |
61 | |
62 | static int lec_open(struct net_device *dev); | |
3c805a22 SH |
63 | static netdev_tx_t lec_start_xmit(struct sk_buff *skb, |
64 | struct net_device *dev); | |
1da177e4 | 65 | static int lec_close(struct net_device *dev); |
d44f7746 | 66 | static struct lec_arp_table *lec_arp_find(struct lec_priv *priv, |
61c33e01 | 67 | const unsigned char *mac_addr); |
1da177e4 | 68 | static int lec_arp_remove(struct lec_priv *priv, |
d44f7746 | 69 | struct lec_arp_table *to_remove); |
1da177e4 | 70 | /* LANE2 functions */ |
61c33e01 MBJ |
71 | static void lane2_associate_ind(struct net_device *dev, const u8 *mac_address, |
72 | const u8 *tlvs, u32 sizeoftlvs); | |
73 | static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force, | |
d44f7746 | 74 | u8 **tlvs, u32 *sizeoftlvs); |
61c33e01 MBJ |
75 | static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst, |
76 | const u8 *tlvs, u32 sizeoftlvs); | |
1da177e4 | 77 | |
61c33e01 | 78 | static int lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr, |
1da177e4 LT |
79 | unsigned long permanent); |
80 | static void lec_arp_check_empties(struct lec_priv *priv, | |
81 | struct atm_vcc *vcc, struct sk_buff *skb); | |
82 | static void lec_arp_destroy(struct lec_priv *priv); | |
83 | static void lec_arp_init(struct lec_priv *priv); | |
d44f7746 | 84 | static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv, |
61c33e01 | 85 | const unsigned char *mac_to_find, |
1da177e4 LT |
86 | int is_rdesc, |
87 | struct lec_arp_table **ret_entry); | |
61c33e01 | 88 | static void lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr, |
c48192a7 JP |
89 | const unsigned char *atm_addr, |
90 | unsigned long remoteflag, | |
1da177e4 LT |
91 | unsigned int targetless_le_arp); |
92 | static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id); | |
93 | static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc); | |
94 | static void lec_set_flush_tran_id(struct lec_priv *priv, | |
61c33e01 | 95 | const unsigned char *atm_addr, |
1da177e4 | 96 | unsigned long tran_id); |
c48192a7 JP |
97 | static void lec_vcc_added(struct lec_priv *priv, |
98 | const struct atmlec_ioc *ioc_data, | |
1da177e4 | 99 | struct atm_vcc *vcc, |
c48192a7 JP |
100 | void (*old_push)(struct atm_vcc *vcc, |
101 | struct sk_buff *skb)); | |
1da177e4 LT |
102 | static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc); |
103 | ||
33a9c2d4 CW |
104 | /* must be done under lec_arp_lock */ |
105 | static inline void lec_arp_hold(struct lec_arp_table *entry) | |
106 | { | |
78893664 | 107 | refcount_inc(&entry->usage); |
33a9c2d4 CW |
108 | } |
109 | ||
110 | static inline void lec_arp_put(struct lec_arp_table *entry) | |
111 | { | |
78893664 | 112 | if (refcount_dec_and_test(&entry->usage)) |
33a9c2d4 CW |
113 | kfree(entry); |
114 | } | |
115 | ||
1da177e4 | 116 | static struct lane2_ops lane2_ops = { |
99a5e178 KC |
117 | .resolve = lane2_resolve, /* spec 3.1.3 */ |
118 | .associate_req = lane2_associate_req, /* spec 3.1.4 */ | |
119 | .associate_indicator = NULL /* spec 3.1.5 */ | |
1da177e4 LT |
120 | }; |
121 | ||
d44f7746 | 122 | static unsigned char bus_mac[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; |
1da177e4 LT |
123 | |
124 | /* Device structures */ | |
125 | static struct net_device *dev_lec[MAX_LEC_ITF]; | |
126 | ||
9a81c34a | 127 | #if IS_ENABLED(CONFIG_BRIDGE) |
1da177e4 LT |
128 | static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev) |
129 | { | |
d44f7746 CW |
130 | char *buff; |
131 | struct lec_priv *priv; | |
132 | ||
133 | /* | |
134 | * Check if this is a BPDU. If so, ask zeppelin to send | |
135 | * LE_TOPOLOGY_REQUEST with the same value of Topology Change bit | |
136 | * as the Config BPDU has | |
137 | */ | |
d44f7746 CW |
138 | buff = skb->data + skb->dev->hard_header_len; |
139 | if (*buff++ == 0x42 && *buff++ == 0x42 && *buff++ == 0x03) { | |
1da177e4 | 140 | struct sock *sk; |
d44f7746 CW |
141 | struct sk_buff *skb2; |
142 | struct atmlec_msg *mesg; | |
143 | ||
144 | skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC); | |
145 | if (skb2 == NULL) | |
146 | return; | |
147 | skb2->len = sizeof(struct atmlec_msg); | |
148 | mesg = (struct atmlec_msg *)skb2->data; | |
149 | mesg->type = l_topology_change; | |
150 | buff += 4; | |
c48192a7 JP |
151 | mesg->content.normal.flag = *buff & 0x01; |
152 | /* 0x01 is topology change */ | |
d44f7746 | 153 | |
524ad0a7 | 154 | priv = netdev_priv(dev); |
d44f7746 | 155 | atm_force_charge(priv->lecd, skb2->truesize); |
1da177e4 | 156 | sk = sk_atm(priv->lecd); |
d44f7746 | 157 | skb_queue_tail(&sk->sk_receive_queue, skb2); |
676d2369 | 158 | sk->sk_data_ready(sk); |
d44f7746 | 159 | } |
1da177e4 | 160 | } |
9a81c34a | 161 | #endif /* IS_ENABLED(CONFIG_BRIDGE) */ |
1da177e4 | 162 | |
1da177e4 LT |
163 | /* |
164 | * Open/initialize the netdevice. This is called (in the current kernel) | |
165 | * sometime after booting when the 'ifconfig' program is run. | |
166 | * | |
167 | * This routine should set everything up anew at each open, even | |
168 | * registers that "should" only need to be set once at boot, so that | |
169 | * there is non-reboot way to recover if something goes wrong. | |
170 | */ | |
171 | ||
d44f7746 | 172 | static int lec_open(struct net_device *dev) |
1da177e4 | 173 | { |
1da177e4 | 174 | netif_start_queue(dev); |
d44f7746 CW |
175 | |
176 | return 0; | |
1da177e4 LT |
177 | } |
178 | ||
162619e5 SH |
179 | static void |
180 | lec_send(struct atm_vcc *vcc, struct sk_buff *skb) | |
1da177e4 | 181 | { |
162619e5 SH |
182 | struct net_device *dev = skb->dev; |
183 | ||
1da177e4 | 184 | ATM_SKB(skb)->vcc = vcc; |
9bbe60a6 | 185 | atm_account_tx(vcc, skb); |
1da177e4 | 186 | |
1da177e4 | 187 | if (vcc->send(vcc, skb) < 0) { |
162619e5 | 188 | dev->stats.tx_dropped++; |
1da177e4 LT |
189 | return; |
190 | } | |
191 | ||
162619e5 SH |
192 | dev->stats.tx_packets++; |
193 | dev->stats.tx_bytes += skb->len; | |
1da177e4 LT |
194 | } |
195 | ||
d44f7746 | 196 | static void lec_tx_timeout(struct net_device *dev) |
1da177e4 | 197 | { |
99824461 | 198 | pr_info("%s\n", dev->name); |
860e9538 | 199 | netif_trans_update(dev); |
1da177e4 LT |
200 | netif_wake_queue(dev); |
201 | } | |
202 | ||
3c805a22 SH |
203 | static netdev_tx_t lec_start_xmit(struct sk_buff *skb, |
204 | struct net_device *dev) | |
1da177e4 | 205 | { |
d44f7746 | 206 | struct sk_buff *skb2; |
524ad0a7 | 207 | struct lec_priv *priv = netdev_priv(dev); |
d44f7746 CW |
208 | struct lecdatahdr_8023 *lec_h; |
209 | struct atm_vcc *vcc; | |
1da177e4 | 210 | struct lec_arp_table *entry; |
d44f7746 | 211 | unsigned char *dst; |
1da177e4 | 212 | int min_frame_size; |
d44f7746 | 213 | int is_rdesc; |
d44f7746 | 214 | |
99824461 | 215 | pr_debug("called\n"); |
d44f7746 | 216 | if (!priv->lecd) { |
c48192a7 | 217 | pr_info("%s:No lecd attached\n", dev->name); |
162619e5 | 218 | dev->stats.tx_errors++; |
d44f7746 | 219 | netif_stop_queue(dev); |
81fbbf60 PM |
220 | kfree_skb(skb); |
221 | return NETDEV_TX_OK; | |
d44f7746 CW |
222 | } |
223 | ||
52240062 | 224 | pr_debug("skbuff head:%lx data:%lx tail:%lx end:%lx\n", |
99824461 JP |
225 | (long)skb->head, (long)skb->data, (long)skb_tail_pointer(skb), |
226 | (long)skb_end_pointer(skb)); | |
9a81c34a | 227 | #if IS_ENABLED(CONFIG_BRIDGE) |
d44f7746 CW |
228 | if (memcmp(skb->data, bridge_ula_lec, sizeof(bridge_ula_lec)) == 0) |
229 | lec_handle_bridge(skb, dev); | |
1da177e4 LT |
230 | #endif |
231 | ||
d44f7746 CW |
232 | /* Make sure we have room for lec_id */ |
233 | if (skb_headroom(skb) < 2) { | |
99824461 | 234 | pr_debug("reallocating skb\n"); |
d44f7746 | 235 | skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN); |
5d0ba55b ED |
236 | if (unlikely(!skb2)) { |
237 | kfree_skb(skb); | |
6ed10654 | 238 | return NETDEV_TX_OK; |
5d0ba55b ED |
239 | } |
240 | consume_skb(skb); | |
d44f7746 CW |
241 | skb = skb2; |
242 | } | |
243 | skb_push(skb, 2); | |
1da177e4 | 244 | |
60eea6cf | 245 | /* Put le header to place */ |
d44f7746 CW |
246 | lec_h = (struct lecdatahdr_8023 *)skb->data; |
247 | lec_h->le_header = htons(priv->lecid); | |
1da177e4 | 248 | |
1da177e4 | 249 | #if DUMP_PACKETS >= 2 |
c48192a7 | 250 | #define MAX_DUMP_SKB 99 |
1da177e4 | 251 | #elif DUMP_PACKETS >= 1 |
c48192a7 JP |
252 | #define MAX_DUMP_SKB 30 |
253 | #endif | |
254 | #if DUMP_PACKETS >= 1 | |
255 | printk(KERN_DEBUG "%s: send datalen:%ld lecid:%4.4x\n", | |
256 | dev->name, skb->len, priv->lecid); | |
257 | print_hex_dump(KERN_DEBUG, "", DUMP_OFFSET, 16, 1, | |
258 | skb->data, min(skb->len, MAX_DUMP_SKB), true); | |
1da177e4 | 259 | #endif /* DUMP_PACKETS >= 1 */ |
1da177e4 | 260 | |
d44f7746 | 261 | /* Minimum ethernet-frame size */ |
60eea6cf | 262 | min_frame_size = LEC_MINIMUM_8023_SIZE; |
d44f7746 CW |
263 | if (skb->len < min_frame_size) { |
264 | if ((skb->len + skb_tailroom(skb)) < min_frame_size) { | |
265 | skb2 = skb_copy_expand(skb, 0, | |
266 | min_frame_size - skb->truesize, | |
267 | GFP_ATOMIC); | |
268 | dev_kfree_skb(skb); | |
269 | if (skb2 == NULL) { | |
162619e5 | 270 | dev->stats.tx_dropped++; |
6ed10654 | 271 | return NETDEV_TX_OK; |
d44f7746 CW |
272 | } |
273 | skb = skb2; | |
274 | } | |
1da177e4 | 275 | skb_put(skb, min_frame_size - skb->len); |
d44f7746 CW |
276 | } |
277 | ||
278 | /* Send to right vcc */ | |
279 | is_rdesc = 0; | |
280 | dst = lec_h->h_dest; | |
d44f7746 CW |
281 | entry = NULL; |
282 | vcc = lec_arp_resolve(priv, dst, is_rdesc, &entry); | |
99824461 JP |
283 | pr_debug("%s:vcc:%p vcc_flags:%lx, entry:%p\n", |
284 | dev->name, vcc, vcc ? vcc->flags : 0, entry); | |
d44f7746 CW |
285 | if (!vcc || !test_bit(ATM_VF_READY, &vcc->flags)) { |
286 | if (entry && (entry->tx_wait.qlen < LEC_UNRES_QUE_LEN)) { | |
99824461 JP |
287 | pr_debug("%s:queuing packet, MAC address %pM\n", |
288 | dev->name, lec_h->h_dest); | |
d44f7746 CW |
289 | skb_queue_tail(&entry->tx_wait, skb); |
290 | } else { | |
99824461 JP |
291 | pr_debug("%s:tx queue full or no arp entry, dropping, MAC address: %pM\n", |
292 | dev->name, lec_h->h_dest); | |
162619e5 | 293 | dev->stats.tx_dropped++; |
d44f7746 CW |
294 | dev_kfree_skb(skb); |
295 | } | |
6656e3c4 | 296 | goto out; |
d44f7746 CW |
297 | } |
298 | #if DUMP_PACKETS > 0 | |
c48192a7 JP |
299 | printk(KERN_DEBUG "%s:sending to vpi:%d vci:%d\n", |
300 | dev->name, vcc->vpi, vcc->vci); | |
1da177e4 | 301 | #endif /* DUMP_PACKETS > 0 */ |
d44f7746 CW |
302 | |
303 | while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) { | |
99824461 | 304 | pr_debug("emptying tx queue, MAC address %pM\n", lec_h->h_dest); |
162619e5 | 305 | lec_send(vcc, skb2); |
d44f7746 | 306 | } |
1da177e4 | 307 | |
162619e5 | 308 | lec_send(vcc, skb); |
1da177e4 LT |
309 | |
310 | if (!atm_may_send(vcc, 0)) { | |
311 | struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); | |
312 | ||
313 | vpriv->xoff = 1; | |
314 | netif_stop_queue(dev); | |
315 | ||
316 | /* | |
317 | * vcc->pop() might have occurred in between, making | |
318 | * the vcc usuable again. Since xmit is serialized, | |
319 | * this is the only situation we have to re-test. | |
320 | */ | |
321 | ||
322 | if (atm_may_send(vcc, 0)) | |
323 | netif_wake_queue(dev); | |
324 | } | |
325 | ||
6656e3c4 CW |
326 | out: |
327 | if (entry) | |
328 | lec_arp_put(entry); | |
860e9538 | 329 | netif_trans_update(dev); |
6ed10654 | 330 | return NETDEV_TX_OK; |
1da177e4 LT |
331 | } |
332 | ||
333 | /* The inverse routine to net_open(). */ | |
d44f7746 | 334 | static int lec_close(struct net_device *dev) |
1da177e4 | 335 | { |
d44f7746 CW |
336 | netif_stop_queue(dev); |
337 | return 0; | |
1da177e4 LT |
338 | } |
339 | ||
d44f7746 | 340 | static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb) |
1da177e4 LT |
341 | { |
342 | unsigned long flags; | |
d44f7746 | 343 | struct net_device *dev = (struct net_device *)vcc->proto_data; |
524ad0a7 | 344 | struct lec_priv *priv = netdev_priv(dev); |
d44f7746 CW |
345 | struct atmlec_msg *mesg; |
346 | struct lec_arp_table *entry; | |
347 | int i; | |
348 | char *tmp; /* FIXME */ | |
1da177e4 | 349 | |
14afee4b | 350 | WARN_ON(refcount_sub_and_test(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc)); |
d44f7746 CW |
351 | mesg = (struct atmlec_msg *)skb->data; |
352 | tmp = skb->data; | |
353 | tmp += sizeof(struct atmlec_msg); | |
52240062 | 354 | pr_debug("%s: msg from zeppelin:%d\n", dev->name, mesg->type); |
d44f7746 CW |
355 | switch (mesg->type) { |
356 | case l_set_mac_addr: | |
c48192a7 | 357 | for (i = 0; i < 6; i++) |
d44f7746 | 358 | dev->dev_addr[i] = mesg->content.normal.mac_addr[i]; |
d44f7746 CW |
359 | break; |
360 | case l_del_mac_addr: | |
c48192a7 | 361 | for (i = 0; i < 6; i++) |
d44f7746 | 362 | dev->dev_addr[i] = 0; |
d44f7746 CW |
363 | break; |
364 | case l_addr_delete: | |
365 | lec_addr_delete(priv, mesg->content.normal.atm_addr, | |
366 | mesg->content.normal.flag); | |
367 | break; | |
368 | case l_topology_change: | |
369 | priv->topology_change = mesg->content.normal.flag; | |
370 | break; | |
371 | case l_flush_complete: | |
372 | lec_flush_complete(priv, mesg->content.normal.flag); | |
373 | break; | |
374 | case l_narp_req: /* LANE2: see 7.1.35 in the lane2 spec */ | |
1da177e4 | 375 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
d44f7746 CW |
376 | entry = lec_arp_find(priv, mesg->content.normal.mac_addr); |
377 | lec_arp_remove(priv, entry); | |
1da177e4 LT |
378 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
379 | ||
d44f7746 CW |
380 | if (mesg->content.normal.no_source_le_narp) |
381 | break; | |
382 | /* FALL THROUGH */ | |
383 | case l_arp_update: | |
384 | lec_arp_update(priv, mesg->content.normal.mac_addr, | |
385 | mesg->content.normal.atm_addr, | |
386 | mesg->content.normal.flag, | |
387 | mesg->content.normal.targetless_le_arp); | |
99824461 | 388 | pr_debug("in l_arp_update\n"); |
d44f7746 | 389 | if (mesg->sizeoftlvs != 0) { /* LANE2 3.1.5 */ |
99824461 JP |
390 | pr_debug("LANE2 3.1.5, got tlvs, size %d\n", |
391 | mesg->sizeoftlvs); | |
d44f7746 CW |
392 | lane2_associate_ind(dev, mesg->content.normal.mac_addr, |
393 | tmp, mesg->sizeoftlvs); | |
394 | } | |
395 | break; | |
396 | case l_config: | |
397 | priv->maximum_unknown_frame_count = | |
398 | mesg->content.config.maximum_unknown_frame_count; | |
399 | priv->max_unknown_frame_time = | |
400 | (mesg->content.config.max_unknown_frame_time * HZ); | |
401 | priv->max_retry_count = mesg->content.config.max_retry_count; | |
402 | priv->aging_time = (mesg->content.config.aging_time * HZ); | |
403 | priv->forward_delay_time = | |
404 | (mesg->content.config.forward_delay_time * HZ); | |
405 | priv->arp_response_time = | |
406 | (mesg->content.config.arp_response_time * HZ); | |
407 | priv->flush_timeout = (mesg->content.config.flush_timeout * HZ); | |
408 | priv->path_switching_delay = | |
409 | (mesg->content.config.path_switching_delay * HZ); | |
c48192a7 JP |
410 | priv->lane_version = mesg->content.config.lane_version; |
411 | /* LANE2 */ | |
1da177e4 LT |
412 | priv->lane2_ops = NULL; |
413 | if (priv->lane_version > 1) | |
414 | priv->lane2_ops = &lane2_ops; | |
6df378d2 | 415 | rtnl_lock(); |
1f1900f9 | 416 | if (dev_set_mtu(dev, mesg->content.config.mtu)) |
c48192a7 JP |
417 | pr_info("%s: change_mtu to %d failed\n", |
418 | dev->name, mesg->content.config.mtu); | |
6df378d2 | 419 | rtnl_unlock(); |
1da177e4 | 420 | priv->is_proxy = mesg->content.config.is_proxy; |
d44f7746 CW |
421 | break; |
422 | case l_flush_tran_id: | |
423 | lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr, | |
424 | mesg->content.normal.flag); | |
425 | break; | |
426 | case l_set_lecid: | |
427 | priv->lecid = | |
428 | (unsigned short)(0xffff & mesg->content.normal.flag); | |
429 | break; | |
430 | case l_should_bridge: | |
9a81c34a | 431 | #if IS_ENABLED(CONFIG_BRIDGE) |
b4c84ec0 JP |
432 | { |
433 | pr_debug("%s: bridge zeppelin asks about %pM\n", | |
434 | dev->name, mesg->content.proxy.mac_addr); | |
d44f7746 | 435 | |
b4c84ec0 JP |
436 | if (br_fdb_test_addr_hook == NULL) |
437 | break; | |
d44f7746 | 438 | |
b4c84ec0 JP |
439 | if (br_fdb_test_addr_hook(dev, mesg->content.proxy.mac_addr)) { |
440 | /* hit from bridge table, send LE_ARP_RESPONSE */ | |
441 | struct sk_buff *skb2; | |
442 | struct sock *sk; | |
443 | ||
444 | pr_debug("%s: entry found, responding to zeppelin\n", | |
445 | dev->name); | |
446 | skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC); | |
447 | if (skb2 == NULL) | |
448 | break; | |
449 | skb2->len = sizeof(struct atmlec_msg); | |
450 | skb_copy_to_linear_data(skb2, mesg, sizeof(*mesg)); | |
451 | atm_force_charge(priv->lecd, skb2->truesize); | |
452 | sk = sk_atm(priv->lecd); | |
453 | skb_queue_tail(&sk->sk_receive_queue, skb2); | |
676d2369 | 454 | sk->sk_data_ready(sk); |
d44f7746 | 455 | } |
b4c84ec0 | 456 | } |
9a81c34a | 457 | #endif /* IS_ENABLED(CONFIG_BRIDGE) */ |
d44f7746 CW |
458 | break; |
459 | default: | |
c48192a7 | 460 | pr_info("%s: Unknown message type %d\n", dev->name, mesg->type); |
d44f7746 CW |
461 | dev_kfree_skb(skb); |
462 | return -EINVAL; | |
463 | } | |
464 | dev_kfree_skb(skb); | |
465 | return 0; | |
1da177e4 LT |
466 | } |
467 | ||
d44f7746 | 468 | static void lec_atm_close(struct atm_vcc *vcc) |
1da177e4 | 469 | { |
d44f7746 CW |
470 | struct sk_buff *skb; |
471 | struct net_device *dev = (struct net_device *)vcc->proto_data; | |
524ad0a7 | 472 | struct lec_priv *priv = netdev_priv(dev); |
1da177e4 | 473 | |
d44f7746 CW |
474 | priv->lecd = NULL; |
475 | /* Do something needful? */ | |
1da177e4 | 476 | |
d44f7746 CW |
477 | netif_stop_queue(dev); |
478 | lec_arp_destroy(priv); | |
1da177e4 | 479 | |
d44f7746 | 480 | if (skb_peek(&sk_atm(vcc)->sk_receive_queue)) |
c48192a7 | 481 | pr_info("%s closing with messages pending\n", dev->name); |
b4c84ec0 | 482 | while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue))) { |
d44f7746 | 483 | atm_return(vcc, skb->truesize); |
1da177e4 | 484 | dev_kfree_skb(skb); |
d44f7746 CW |
485 | } |
486 | ||
c48192a7 | 487 | pr_info("%s: Shut down!\n", dev->name); |
d44f7746 | 488 | module_put(THIS_MODULE); |
1da177e4 LT |
489 | } |
490 | ||
800bb47e | 491 | static const struct atmdev_ops lecdev_ops = { |
d44f7746 CW |
492 | .close = lec_atm_close, |
493 | .send = lec_atm_send | |
1da177e4 LT |
494 | }; |
495 | ||
496 | static struct atm_dev lecatm_dev = { | |
d44f7746 CW |
497 | .ops = &lecdev_ops, |
498 | .type = "lec", | |
499 | .number = 999, /* dummy device number */ | |
4ef8d0ae | 500 | .lock = __SPIN_LOCK_UNLOCKED(lecatm_dev.lock) |
1da177e4 LT |
501 | }; |
502 | ||
503 | /* | |
504 | * LANE2: new argument struct sk_buff *data contains | |
505 | * the LE_ARP based TLVs introduced in the LANE2 spec | |
506 | */ | |
d44f7746 CW |
507 | static int |
508 | send_to_lecd(struct lec_priv *priv, atmlec_msg_type type, | |
61c33e01 | 509 | const unsigned char *mac_addr, const unsigned char *atm_addr, |
d44f7746 | 510 | struct sk_buff *data) |
1da177e4 LT |
511 | { |
512 | struct sock *sk; | |
513 | struct sk_buff *skb; | |
514 | struct atmlec_msg *mesg; | |
515 | ||
c48192a7 | 516 | if (!priv || !priv->lecd) |
1da177e4 | 517 | return -1; |
1da177e4 LT |
518 | skb = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC); |
519 | if (!skb) | |
520 | return -1; | |
521 | skb->len = sizeof(struct atmlec_msg); | |
522 | mesg = (struct atmlec_msg *)skb->data; | |
d44f7746 | 523 | memset(mesg, 0, sizeof(struct atmlec_msg)); |
1da177e4 | 524 | mesg->type = type; |
d44f7746 CW |
525 | if (data != NULL) |
526 | mesg->sizeoftlvs = data->len; | |
1da177e4 | 527 | if (mac_addr) |
9be68c1a | 528 | ether_addr_copy(mesg->content.normal.mac_addr, mac_addr); |
d44f7746 CW |
529 | else |
530 | mesg->content.normal.targetless_le_arp = 1; | |
1da177e4 LT |
531 | if (atm_addr) |
532 | memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN); | |
533 | ||
d44f7746 | 534 | atm_force_charge(priv->lecd, skb->truesize); |
1da177e4 LT |
535 | sk = sk_atm(priv->lecd); |
536 | skb_queue_tail(&sk->sk_receive_queue, skb); | |
676d2369 | 537 | sk->sk_data_ready(sk); |
1da177e4 | 538 | |
d44f7746 | 539 | if (data != NULL) { |
99824461 | 540 | pr_debug("about to send %d bytes of data\n", data->len); |
d44f7746 CW |
541 | atm_force_charge(priv->lecd, data->truesize); |
542 | skb_queue_tail(&sk->sk_receive_queue, data); | |
676d2369 | 543 | sk->sk_data_ready(sk); |
d44f7746 | 544 | } |
1da177e4 | 545 | |
d44f7746 | 546 | return 0; |
1da177e4 LT |
547 | } |
548 | ||
1da177e4 LT |
549 | static void lec_set_multicast_list(struct net_device *dev) |
550 | { | |
d44f7746 CW |
551 | /* |
552 | * by default, all multicast frames arrive over the bus. | |
553 | * eventually support selective multicast service | |
554 | */ | |
1da177e4 LT |
555 | } |
556 | ||
004b3225 SH |
557 | static const struct net_device_ops lec_netdev_ops = { |
558 | .ndo_open = lec_open, | |
559 | .ndo_stop = lec_close, | |
560 | .ndo_start_xmit = lec_start_xmit, | |
004b3225 | 561 | .ndo_tx_timeout = lec_tx_timeout, |
afc4b13d | 562 | .ndo_set_rx_mode = lec_set_multicast_list, |
004b3225 SH |
563 | }; |
564 | ||
61c33e01 | 565 | static const unsigned char lec_ctrl_magic[] = { |
d44f7746 CW |
566 | 0xff, |
567 | 0x00, | |
568 | 0x01, | |
569 | 0x01 | |
570 | }; | |
1da177e4 | 571 | |
4a7097fc ST |
572 | #define LEC_DATA_DIRECT_8023 2 |
573 | #define LEC_DATA_DIRECT_8025 3 | |
574 | ||
575 | static int lec_is_data_direct(struct atm_vcc *vcc) | |
d44f7746 | 576 | { |
4a7097fc ST |
577 | return ((vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8023) || |
578 | (vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8025)); | |
d44f7746 | 579 | } |
4a7097fc | 580 | |
d44f7746 | 581 | static void lec_push(struct atm_vcc *vcc, struct sk_buff *skb) |
1da177e4 | 582 | { |
4a7097fc | 583 | unsigned long flags; |
d44f7746 | 584 | struct net_device *dev = (struct net_device *)vcc->proto_data; |
524ad0a7 | 585 | struct lec_priv *priv = netdev_priv(dev); |
1da177e4 | 586 | |
c48192a7 | 587 | #if DUMP_PACKETS > 0 |
99824461 JP |
588 | printk(KERN_DEBUG "%s: vcc vpi:%d vci:%d\n", |
589 | dev->name, vcc->vpi, vcc->vci); | |
1da177e4 | 590 | #endif |
d44f7746 | 591 | if (!skb) { |
52240062 | 592 | pr_debug("%s: null skb\n", dev->name); |
d44f7746 CW |
593 | lec_vcc_close(priv, vcc); |
594 | return; | |
595 | } | |
1da177e4 | 596 | #if DUMP_PACKETS >= 2 |
99824461 | 597 | #define MAX_SKB_DUMP 99 |
1da177e4 | 598 | #elif DUMP_PACKETS >= 1 |
99824461 JP |
599 | #define MAX_SKB_DUMP 30 |
600 | #endif | |
601 | #if DUMP_PACKETS > 0 | |
602 | printk(KERN_DEBUG "%s: rcv datalen:%ld lecid:%4.4x\n", | |
603 | dev->name, skb->len, priv->lecid); | |
604 | print_hex_dump(KERN_DEBUG, "", DUMP_OFFSET, 16, 1, | |
605 | skb->data, min(MAX_SKB_DUMP, skb->len), true); | |
1da177e4 | 606 | #endif /* DUMP_PACKETS > 0 */ |
99824461 JP |
607 | if (memcmp(skb->data, lec_ctrl_magic, 4) == 0) { |
608 | /* Control frame, to daemon */ | |
1da177e4 LT |
609 | struct sock *sk = sk_atm(vcc); |
610 | ||
52240062 | 611 | pr_debug("%s: To daemon\n", dev->name); |
d44f7746 | 612 | skb_queue_tail(&sk->sk_receive_queue, skb); |
676d2369 | 613 | sk->sk_data_ready(sk); |
d44f7746 | 614 | } else { /* Data frame, queue to protocol handlers */ |
4a7097fc | 615 | struct lec_arp_table *entry; |
d44f7746 CW |
616 | unsigned char *src, *dst; |
617 | ||
618 | atm_return(vcc, skb->truesize); | |
30d492da | 619 | if (*(__be16 *) skb->data == htons(priv->lecid) || |
d44f7746 CW |
620 | !priv->lecd || !(dev->flags & IFF_UP)) { |
621 | /* | |
622 | * Probably looping back, or if lecd is missing, | |
623 | * lecd has gone down | |
624 | */ | |
52240062 | 625 | pr_debug("Ignoring frame...\n"); |
d44f7746 CW |
626 | dev_kfree_skb(skb); |
627 | return; | |
628 | } | |
60eea6cf | 629 | dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest; |
4a7097fc | 630 | |
d44f7746 CW |
631 | /* |
632 | * If this is a Data Direct VCC, and the VCC does not match | |
4a7097fc ST |
633 | * the LE_ARP cache entry, delete the LE_ARP cache entry. |
634 | */ | |
635 | spin_lock_irqsave(&priv->lec_arp_lock, flags); | |
636 | if (lec_is_data_direct(vcc)) { | |
60eea6cf | 637 | src = ((struct lecdatahdr_8023 *)skb->data)->h_source; |
4a7097fc ST |
638 | entry = lec_arp_find(priv, src); |
639 | if (entry && entry->vcc != vcc) { | |
640 | lec_arp_remove(priv, entry); | |
33a9c2d4 | 641 | lec_arp_put(entry); |
4a7097fc ST |
642 | } |
643 | } | |
644 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); | |
1da177e4 | 645 | |
d44f7746 CW |
646 | if (!(dst[0] & 0x01) && /* Never filter Multi/Broadcast */ |
647 | !priv->is_proxy && /* Proxy wants all the packets */ | |
1da177e4 | 648 | memcmp(dst, dev->dev_addr, dev->addr_len)) { |
d44f7746 CW |
649 | dev_kfree_skb(skb); |
650 | return; | |
651 | } | |
c48192a7 | 652 | if (!hlist_empty(&priv->lec_arp_empty_ones)) |
d44f7746 | 653 | lec_arp_check_empties(priv, vcc, skb); |
d44f7746 | 654 | skb_pull(skb, 2); /* skip lec_id */ |
60eea6cf | 655 | skb->protocol = eth_type_trans(skb, dev); |
162619e5 SH |
656 | dev->stats.rx_packets++; |
657 | dev->stats.rx_bytes += skb->len; | |
d44f7746 CW |
658 | memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data)); |
659 | netif_rx(skb); | |
660 | } | |
1da177e4 LT |
661 | } |
662 | ||
d44f7746 | 663 | static void lec_pop(struct atm_vcc *vcc, struct sk_buff *skb) |
1da177e4 LT |
664 | { |
665 | struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); | |
666 | struct net_device *dev = skb->dev; | |
667 | ||
668 | if (vpriv == NULL) { | |
99824461 | 669 | pr_info("vpriv = NULL!?!?!?\n"); |
1da177e4 LT |
670 | return; |
671 | } | |
672 | ||
673 | vpriv->old_pop(vcc, skb); | |
674 | ||
675 | if (vpriv->xoff && atm_may_send(vcc, 0)) { | |
676 | vpriv->xoff = 0; | |
677 | if (netif_running(dev) && netif_queue_stopped(dev)) | |
678 | netif_wake_queue(dev); | |
679 | } | |
680 | } | |
681 | ||
d44f7746 | 682 | static int lec_vcc_attach(struct atm_vcc *vcc, void __user *arg) |
1da177e4 LT |
683 | { |
684 | struct lec_vcc_priv *vpriv; | |
d44f7746 CW |
685 | int bytes_left; |
686 | struct atmlec_ioc ioc_data; | |
687 | ||
688 | /* Lecd must be up in this case */ | |
689 | bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc)); | |
99824461 JP |
690 | if (bytes_left != 0) |
691 | pr_info("copy from user failed for %d bytes\n", bytes_left); | |
acf784bd GS |
692 | if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF) |
693 | return -EINVAL; | |
694 | ioc_data.dev_num = array_index_nospec(ioc_data.dev_num, MAX_LEC_ITF); | |
695 | if (!dev_lec[ioc_data.dev_num]) | |
d44f7746 | 696 | return -EINVAL; |
c48192a7 JP |
697 | vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL); |
698 | if (!vpriv) | |
1da177e4 LT |
699 | return -ENOMEM; |
700 | vpriv->xoff = 0; | |
701 | vpriv->old_pop = vcc->pop; | |
702 | vcc->user_back = vpriv; | |
703 | vcc->pop = lec_pop; | |
524ad0a7 | 704 | lec_vcc_added(netdev_priv(dev_lec[ioc_data.dev_num]), |
d44f7746 CW |
705 | &ioc_data, vcc, vcc->push); |
706 | vcc->proto_data = dev_lec[ioc_data.dev_num]; | |
707 | vcc->push = lec_push; | |
708 | return 0; | |
1da177e4 LT |
709 | } |
710 | ||
d44f7746 | 711 | static int lec_mcast_attach(struct atm_vcc *vcc, int arg) |
1da177e4 | 712 | { |
d44f7746 CW |
713 | if (arg < 0 || arg >= MAX_LEC_ITF || !dev_lec[arg]) |
714 | return -EINVAL; | |
715 | vcc->proto_data = dev_lec[arg]; | |
37d66800 | 716 | return lec_mcast_make(netdev_priv(dev_lec[arg]), vcc); |
1da177e4 LT |
717 | } |
718 | ||
719 | /* Initialize device. */ | |
d44f7746 CW |
720 | static int lecd_attach(struct atm_vcc *vcc, int arg) |
721 | { | |
722 | int i; | |
723 | struct lec_priv *priv; | |
724 | ||
725 | if (arg < 0) | |
726 | i = 0; | |
727 | else | |
728 | i = arg; | |
d44f7746 CW |
729 | if (arg >= MAX_LEC_ITF) |
730 | return -EINVAL; | |
d44f7746 | 731 | if (!dev_lec[i]) { |
60eea6cf | 732 | int size; |
1da177e4 | 733 | |
d44f7746 | 734 | size = sizeof(struct lec_priv); |
60eea6cf | 735 | dev_lec[i] = alloc_etherdev(size); |
d44f7746 CW |
736 | if (!dev_lec[i]) |
737 | return -ENOMEM; | |
eb044588 | 738 | dev_lec[i]->netdev_ops = &lec_netdev_ops; |
8b6b4135 | 739 | dev_lec[i]->max_mtu = 18190; |
d44f7746 CW |
740 | snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i); |
741 | if (register_netdev(dev_lec[i])) { | |
742 | free_netdev(dev_lec[i]); | |
743 | return -EINVAL; | |
744 | } | |
745 | ||
524ad0a7 | 746 | priv = netdev_priv(dev_lec[i]); |
d44f7746 | 747 | } else { |
524ad0a7 | 748 | priv = netdev_priv(dev_lec[i]); |
d44f7746 CW |
749 | if (priv->lecd) |
750 | return -EADDRINUSE; | |
751 | } | |
752 | lec_arp_init(priv); | |
753 | priv->itfnum = i; /* LANE2 addition */ | |
754 | priv->lecd = vcc; | |
755 | vcc->dev = &lecatm_dev; | |
756 | vcc_insert_socket(sk_atm(vcc)); | |
757 | ||
758 | vcc->proto_data = dev_lec[i]; | |
759 | set_bit(ATM_VF_META, &vcc->flags); | |
760 | set_bit(ATM_VF_READY, &vcc->flags); | |
761 | ||
762 | /* Set default values to these variables */ | |
763 | priv->maximum_unknown_frame_count = 1; | |
764 | priv->max_unknown_frame_time = (1 * HZ); | |
765 | priv->vcc_timeout_period = (1200 * HZ); | |
766 | priv->max_retry_count = 1; | |
767 | priv->aging_time = (300 * HZ); | |
768 | priv->forward_delay_time = (15 * HZ); | |
769 | priv->topology_change = 0; | |
770 | priv->arp_response_time = (1 * HZ); | |
771 | priv->flush_timeout = (4 * HZ); | |
772 | priv->path_switching_delay = (6 * HZ); | |
773 | ||
c48192a7 | 774 | if (dev_lec[i]->flags & IFF_UP) |
d44f7746 | 775 | netif_start_queue(dev_lec[i]); |
d44f7746 CW |
776 | __module_get(THIS_MODULE); |
777 | return i; | |
1da177e4 LT |
778 | } |
779 | ||
780 | #ifdef CONFIG_PROC_FS | |
36cbd3dc | 781 | static const char *lec_arp_get_status_string(unsigned char status) |
1da177e4 | 782 | { |
36cbd3dc | 783 | static const char *const lec_arp_status_string[] = { |
1da177e4 LT |
784 | "ESI_UNKNOWN ", |
785 | "ESI_ARP_PENDING ", | |
786 | "ESI_VC_PENDING ", | |
787 | "<Undefined> ", | |
788 | "ESI_FLUSH_PENDING ", | |
789 | "ESI_FORWARD_DIRECT" | |
790 | }; | |
791 | ||
792 | if (status > ESI_FORWARD_DIRECT) | |
793 | status = 3; /* ESI_UNDEFINED */ | |
794 | return lec_arp_status_string[status]; | |
795 | } | |
796 | ||
797 | static void lec_info(struct seq_file *seq, struct lec_arp_table *entry) | |
798 | { | |
799 | int i; | |
800 | ||
801 | for (i = 0; i < ETH_ALEN; i++) | |
802 | seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff); | |
803 | seq_printf(seq, " "); | |
804 | for (i = 0; i < ATM_ESA_LEN; i++) | |
805 | seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff); | |
806 | seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status), | |
807 | entry->flags & 0xffff); | |
808 | if (entry->vcc) | |
809 | seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci); | |
810 | else | |
d44f7746 | 811 | seq_printf(seq, " "); |
1da177e4 LT |
812 | if (entry->recv_vcc) { |
813 | seq_printf(seq, " %3d %3d", entry->recv_vcc->vpi, | |
814 | entry->recv_vcc->vci); | |
d44f7746 CW |
815 | } |
816 | seq_putc(seq, '\n'); | |
1da177e4 LT |
817 | } |
818 | ||
1da177e4 LT |
819 | struct lec_state { |
820 | unsigned long flags; | |
821 | struct lec_priv *locked; | |
d0732f64 | 822 | struct hlist_node *node; |
1da177e4 LT |
823 | struct net_device *dev; |
824 | int itf; | |
825 | int arp_table; | |
826 | int misc_table; | |
827 | }; | |
828 | ||
d0732f64 | 829 | static void *lec_tbl_walk(struct lec_state *state, struct hlist_head *tbl, |
1da177e4 LT |
830 | loff_t *l) |
831 | { | |
d0732f64 | 832 | struct hlist_node *e = state->node; |
1da177e4 LT |
833 | |
834 | if (!e) | |
d0732f64 | 835 | e = tbl->first; |
2e1e9848 | 836 | if (e == SEQ_START_TOKEN) { |
d0732f64 | 837 | e = tbl->first; |
1da177e4 LT |
838 | --*l; |
839 | } | |
d0732f64 | 840 | |
8356f9d5 | 841 | for (; e; e = e->next) { |
1da177e4 LT |
842 | if (--*l < 0) |
843 | break; | |
844 | } | |
d0732f64 CW |
845 | state->node = e; |
846 | ||
1da177e4 LT |
847 | return (*l < 0) ? state : NULL; |
848 | } | |
849 | ||
850 | static void *lec_arp_walk(struct lec_state *state, loff_t *l, | |
d44f7746 | 851 | struct lec_priv *priv) |
1da177e4 LT |
852 | { |
853 | void *v = NULL; | |
854 | int p; | |
855 | ||
856 | for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) { | |
d0732f64 | 857 | v = lec_tbl_walk(state, &priv->lec_arp_tables[p], l); |
1da177e4 LT |
858 | if (v) |
859 | break; | |
860 | } | |
861 | state->arp_table = p; | |
862 | return v; | |
863 | } | |
864 | ||
865 | static void *lec_misc_walk(struct lec_state *state, loff_t *l, | |
866 | struct lec_priv *priv) | |
867 | { | |
d0732f64 CW |
868 | struct hlist_head *lec_misc_tables[] = { |
869 | &priv->lec_arp_empty_ones, | |
870 | &priv->lec_no_forward, | |
871 | &priv->mcast_fwds | |
1da177e4 LT |
872 | }; |
873 | void *v = NULL; | |
874 | int q; | |
875 | ||
876 | for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) { | |
877 | v = lec_tbl_walk(state, lec_misc_tables[q], l); | |
878 | if (v) | |
879 | break; | |
880 | } | |
881 | state->misc_table = q; | |
882 | return v; | |
883 | } | |
884 | ||
885 | static void *lec_priv_walk(struct lec_state *state, loff_t *l, | |
886 | struct lec_priv *priv) | |
887 | { | |
888 | if (!state->locked) { | |
889 | state->locked = priv; | |
890 | spin_lock_irqsave(&priv->lec_arp_lock, state->flags); | |
891 | } | |
d44f7746 | 892 | if (!lec_arp_walk(state, l, priv) && !lec_misc_walk(state, l, priv)) { |
1da177e4 LT |
893 | spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags); |
894 | state->locked = NULL; | |
895 | /* Partial state reset for the next time we get called */ | |
896 | state->arp_table = state->misc_table = 0; | |
897 | } | |
898 | return state->locked; | |
899 | } | |
900 | ||
901 | static void *lec_itf_walk(struct lec_state *state, loff_t *l) | |
902 | { | |
903 | struct net_device *dev; | |
904 | void *v; | |
905 | ||
906 | dev = state->dev ? state->dev : dev_lec[state->itf]; | |
524ad0a7 WC |
907 | v = (dev && netdev_priv(dev)) ? |
908 | lec_priv_walk(state, l, netdev_priv(dev)) : NULL; | |
1da177e4 LT |
909 | if (!v && dev) { |
910 | dev_put(dev); | |
911 | /* Partial state reset for the next time we get called */ | |
912 | dev = NULL; | |
913 | } | |
914 | state->dev = dev; | |
915 | return v; | |
916 | } | |
917 | ||
918 | static void *lec_get_idx(struct lec_state *state, loff_t l) | |
919 | { | |
920 | void *v = NULL; | |
921 | ||
922 | for (; state->itf < MAX_LEC_ITF; state->itf++) { | |
923 | v = lec_itf_walk(state, &l); | |
924 | if (v) | |
925 | break; | |
926 | } | |
d44f7746 | 927 | return v; |
1da177e4 LT |
928 | } |
929 | ||
930 | static void *lec_seq_start(struct seq_file *seq, loff_t *pos) | |
931 | { | |
932 | struct lec_state *state = seq->private; | |
933 | ||
934 | state->itf = 0; | |
935 | state->dev = NULL; | |
936 | state->locked = NULL; | |
937 | state->arp_table = 0; | |
938 | state->misc_table = 0; | |
2e1e9848 | 939 | state->node = SEQ_START_TOKEN; |
1da177e4 | 940 | |
2e1e9848 | 941 | return *pos ? lec_get_idx(state, *pos) : SEQ_START_TOKEN; |
1da177e4 LT |
942 | } |
943 | ||
944 | static void lec_seq_stop(struct seq_file *seq, void *v) | |
945 | { | |
946 | struct lec_state *state = seq->private; | |
947 | ||
948 | if (state->dev) { | |
949 | spin_unlock_irqrestore(&state->locked->lec_arp_lock, | |
950 | state->flags); | |
951 | dev_put(state->dev); | |
952 | } | |
953 | } | |
954 | ||
955 | static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
956 | { | |
957 | struct lec_state *state = seq->private; | |
958 | ||
959 | v = lec_get_idx(state, 1); | |
960 | *pos += !!PTR_ERR(v); | |
961 | return v; | |
962 | } | |
963 | ||
964 | static int lec_seq_show(struct seq_file *seq, void *v) | |
965 | { | |
36cbd3dc JE |
966 | static const char lec_banner[] = |
967 | "Itf MAC ATM destination" | |
d44f7746 CW |
968 | " Status Flags " |
969 | "VPI/VCI Recv VPI/VCI\n"; | |
1da177e4 | 970 | |
2e1e9848 | 971 | if (v == SEQ_START_TOKEN) |
1da177e4 LT |
972 | seq_puts(seq, lec_banner); |
973 | else { | |
974 | struct lec_state *state = seq->private; | |
d44f7746 | 975 | struct net_device *dev = state->dev; |
c48192a7 JP |
976 | struct lec_arp_table *entry = hlist_entry(state->node, |
977 | struct lec_arp_table, | |
978 | next); | |
1da177e4 LT |
979 | |
980 | seq_printf(seq, "%s ", dev->name); | |
d0732f64 | 981 | lec_info(seq, entry); |
1da177e4 LT |
982 | } |
983 | return 0; | |
984 | } | |
985 | ||
56b3d975 | 986 | static const struct seq_operations lec_seq_ops = { |
d44f7746 CW |
987 | .start = lec_seq_start, |
988 | .next = lec_seq_next, | |
989 | .stop = lec_seq_stop, | |
990 | .show = lec_seq_show, | |
1da177e4 | 991 | }; |
1da177e4 LT |
992 | #endif |
993 | ||
994 | static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
995 | { | |
996 | struct atm_vcc *vcc = ATM_SD(sock); | |
997 | int err = 0; | |
d44f7746 | 998 | |
1da177e4 | 999 | switch (cmd) { |
d44f7746 CW |
1000 | case ATMLEC_CTRL: |
1001 | case ATMLEC_MCAST: | |
1002 | case ATMLEC_DATA: | |
1003 | if (!capable(CAP_NET_ADMIN)) | |
1004 | return -EPERM; | |
1005 | break; | |
1006 | default: | |
1007 | return -ENOIOCTLCMD; | |
1da177e4 LT |
1008 | } |
1009 | ||
1010 | switch (cmd) { | |
d44f7746 CW |
1011 | case ATMLEC_CTRL: |
1012 | err = lecd_attach(vcc, (int)arg); | |
1013 | if (err >= 0) | |
1014 | sock->state = SS_CONNECTED; | |
1015 | break; | |
1016 | case ATMLEC_MCAST: | |
1017 | err = lec_mcast_attach(vcc, (int)arg); | |
1018 | break; | |
1019 | case ATMLEC_DATA: | |
1020 | err = lec_vcc_attach(vcc, (void __user *)arg); | |
1021 | break; | |
1da177e4 LT |
1022 | } |
1023 | ||
1024 | return err; | |
1025 | } | |
1026 | ||
1027 | static struct atm_ioctl lane_ioctl_ops = { | |
d44f7746 CW |
1028 | .owner = THIS_MODULE, |
1029 | .ioctl = lane_ioctl, | |
1da177e4 LT |
1030 | }; |
1031 | ||
1032 | static int __init lane_module_init(void) | |
1033 | { | |
1034 | #ifdef CONFIG_PROC_FS | |
1035 | struct proc_dir_entry *p; | |
1036 | ||
44414d82 CH |
1037 | p = proc_create_seq_private("lec", 0444, atm_proc_root, &lec_seq_ops, |
1038 | sizeof(struct lec_state), NULL); | |
dbee0d3f | 1039 | if (!p) { |
99824461 | 1040 | pr_err("Unable to initialize /proc/net/atm/lec\n"); |
dbee0d3f WC |
1041 | return -ENOMEM; |
1042 | } | |
1da177e4 LT |
1043 | #endif |
1044 | ||
1045 | register_atm_ioctl(&lane_ioctl_ops); | |
36a9f77e | 1046 | pr_info("lec.c: initialized\n"); |
d44f7746 | 1047 | return 0; |
1da177e4 LT |
1048 | } |
1049 | ||
1050 | static void __exit lane_module_cleanup(void) | |
1051 | { | |
d44f7746 | 1052 | int i; |
1da177e4 | 1053 | |
9dd0f896 | 1054 | #ifdef CONFIG_PROC_FS |
1da177e4 | 1055 | remove_proc_entry("lec", atm_proc_root); |
9dd0f896 | 1056 | #endif |
1da177e4 LT |
1057 | |
1058 | deregister_atm_ioctl(&lane_ioctl_ops); | |
1059 | ||
d44f7746 CW |
1060 | for (i = 0; i < MAX_LEC_ITF; i++) { |
1061 | if (dev_lec[i] != NULL) { | |
1da177e4 | 1062 | unregister_netdev(dev_lec[i]); |
d44f7746 CW |
1063 | free_netdev(dev_lec[i]); |
1064 | dev_lec[i] = NULL; | |
1065 | } | |
1066 | } | |
1da177e4 LT |
1067 | } |
1068 | ||
1069 | module_init(lane_module_init); | |
1070 | module_exit(lane_module_cleanup); | |
1071 | ||
1072 | /* | |
1073 | * LANE2: 3.1.3, LE_RESOLVE.request | |
1074 | * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs. | |
1075 | * If sizeoftlvs == NULL the default TLVs associated with with this | |
1076 | * lec will be used. | |
1077 | * If dst_mac == NULL, targetless LE_ARP will be sent | |
1078 | */ | |
61c33e01 | 1079 | static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force, |
d44f7746 | 1080 | u8 **tlvs, u32 *sizeoftlvs) |
1da177e4 LT |
1081 | { |
1082 | unsigned long flags; | |
524ad0a7 | 1083 | struct lec_priv *priv = netdev_priv(dev); |
d44f7746 CW |
1084 | struct lec_arp_table *table; |
1085 | struct sk_buff *skb; | |
1086 | int retval; | |
1da177e4 | 1087 | |
d44f7746 | 1088 | if (force == 0) { |
1da177e4 | 1089 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
d44f7746 | 1090 | table = lec_arp_find(priv, dst_mac); |
1da177e4 | 1091 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
d44f7746 CW |
1092 | if (table == NULL) |
1093 | return -1; | |
1094 | ||
2afe37cd | 1095 | *tlvs = kmemdup(table->tlvs, table->sizeoftlvs, GFP_ATOMIC); |
d44f7746 CW |
1096 | if (*tlvs == NULL) |
1097 | return -1; | |
1098 | ||
d44f7746 CW |
1099 | *sizeoftlvs = table->sizeoftlvs; |
1100 | ||
1101 | return 0; | |
1102 | } | |
1da177e4 LT |
1103 | |
1104 | if (sizeoftlvs == NULL) | |
1105 | retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL); | |
d44f7746 | 1106 | |
1da177e4 LT |
1107 | else { |
1108 | skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC); | |
1109 | if (skb == NULL) | |
1110 | return -1; | |
1111 | skb->len = *sizeoftlvs; | |
27d7ff46 | 1112 | skb_copy_to_linear_data(skb, *tlvs, *sizeoftlvs); |
1da177e4 LT |
1113 | retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb); |
1114 | } | |
d44f7746 CW |
1115 | return retval; |
1116 | } | |
1da177e4 LT |
1117 | |
1118 | /* | |
1119 | * LANE2: 3.1.4, LE_ASSOCIATE.request | |
1120 | * Associate the *tlvs with the *lan_dst address. | |
1121 | * Will overwrite any previous association | |
1122 | * Returns 1 for success, 0 for failure (out of memory) | |
1123 | * | |
1124 | */ | |
61c33e01 MBJ |
1125 | static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst, |
1126 | const u8 *tlvs, u32 sizeoftlvs) | |
1da177e4 | 1127 | { |
d44f7746 CW |
1128 | int retval; |
1129 | struct sk_buff *skb; | |
524ad0a7 | 1130 | struct lec_priv *priv = netdev_priv(dev); |
d44f7746 | 1131 | |
150238eb | 1132 | if (!ether_addr_equal(lan_dst, dev->dev_addr)) |
c48192a7 | 1133 | return 0; /* not our mac address */ |
d44f7746 CW |
1134 | |
1135 | kfree(priv->tlvs); /* NULL if there was no previous association */ | |
1136 | ||
2afe37cd | 1137 | priv->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL); |
d44f7746 | 1138 | if (priv->tlvs == NULL) |
c48192a7 | 1139 | return 0; |
d44f7746 | 1140 | priv->sizeoftlvs = sizeoftlvs; |
d44f7746 CW |
1141 | |
1142 | skb = alloc_skb(sizeoftlvs, GFP_ATOMIC); | |
1143 | if (skb == NULL) | |
1144 | return 0; | |
1145 | skb->len = sizeoftlvs; | |
27d7ff46 | 1146 | skb_copy_to_linear_data(skb, tlvs, sizeoftlvs); |
d44f7746 CW |
1147 | retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb); |
1148 | if (retval != 0) | |
c48192a7 | 1149 | pr_info("lec.c: lane2_associate_req() failed\n"); |
d44f7746 CW |
1150 | /* |
1151 | * If the previous association has changed we must | |
1152 | * somehow notify other LANE entities about the change | |
1153 | */ | |
c48192a7 | 1154 | return 1; |
1da177e4 LT |
1155 | } |
1156 | ||
1157 | /* | |
1158 | * LANE2: 3.1.5, LE_ASSOCIATE.indication | |
1159 | * | |
1160 | */ | |
61c33e01 MBJ |
1161 | static void lane2_associate_ind(struct net_device *dev, const u8 *mac_addr, |
1162 | const u8 *tlvs, u32 sizeoftlvs) | |
1da177e4 LT |
1163 | { |
1164 | #if 0 | |
d44f7746 | 1165 | int i = 0; |
1da177e4 | 1166 | #endif |
524ad0a7 | 1167 | struct lec_priv *priv = netdev_priv(dev); |
d44f7746 CW |
1168 | #if 0 /* |
1169 | * Why have the TLVs in LE_ARP entries | |
1170 | * since we do not use them? When you | |
1171 | * uncomment this code, make sure the | |
1172 | * TLVs get freed when entry is killed | |
1173 | */ | |
1174 | struct lec_arp_table *entry = lec_arp_find(priv, mac_addr); | |
1da177e4 | 1175 | |
d44f7746 CW |
1176 | if (entry == NULL) |
1177 | return; /* should not happen */ | |
1da177e4 | 1178 | |
d44f7746 | 1179 | kfree(entry->tlvs); |
1da177e4 | 1180 | |
2afe37cd | 1181 | entry->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL); |
d44f7746 CW |
1182 | if (entry->tlvs == NULL) |
1183 | return; | |
d44f7746 | 1184 | entry->sizeoftlvs = sizeoftlvs; |
1da177e4 LT |
1185 | #endif |
1186 | #if 0 | |
c48192a7 JP |
1187 | pr_info("\n"); |
1188 | pr_info("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs); | |
d44f7746 | 1189 | while (i < sizeoftlvs) |
c48192a7 | 1190 | pr_cont("%02x ", tlvs[i++]); |
d44f7746 | 1191 | |
c48192a7 | 1192 | pr_cont("\n"); |
1da177e4 LT |
1193 | #endif |
1194 | ||
d44f7746 CW |
1195 | /* tell MPOA about the TLVs we saw */ |
1196 | if (priv->lane2_ops && priv->lane2_ops->associate_indicator) { | |
1197 | priv->lane2_ops->associate_indicator(dev, mac_addr, | |
1198 | tlvs, sizeoftlvs); | |
1199 | } | |
1da177e4 LT |
1200 | } |
1201 | ||
1202 | /* | |
1203 | * Here starts what used to lec_arpc.c | |
1204 | * | |
1205 | * lec_arpc.c was added here when making | |
1206 | * lane client modular. October 1997 | |
1da177e4 LT |
1207 | */ |
1208 | ||
1209 | #include <linux/types.h> | |
1da177e4 | 1210 | #include <linux/timer.h> |
c48192a7 | 1211 | #include <linux/param.h> |
60063497 | 1212 | #include <linux/atomic.h> |
1da177e4 LT |
1213 | #include <linux/inetdevice.h> |
1214 | #include <net/route.h> | |
1215 | ||
1da177e4 | 1216 | #if 0 |
c48192a7 | 1217 | #define pr_debug(format, args...) |
1da177e4 | 1218 | /* |
99824461 | 1219 | #define pr_debug printk |
1da177e4 LT |
1220 | */ |
1221 | #endif | |
1222 | #define DEBUG_ARP_TABLE 0 | |
1223 | ||
1224 | #define LEC_ARP_REFRESH_INTERVAL (3*HZ) | |
1225 | ||
c4028958 | 1226 | static void lec_arp_check_expire(struct work_struct *work); |
ba421793 | 1227 | static void lec_arp_expire_arp(struct timer_list *t); |
1da177e4 | 1228 | |
f7d57453 | 1229 | /* |
1da177e4 LT |
1230 | * Arp table funcs |
1231 | */ | |
1232 | ||
c48192a7 | 1233 | #define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE - 1)) |
1da177e4 LT |
1234 | |
1235 | /* | |
1236 | * Initialization of arp-cache | |
1237 | */ | |
1fa9961d | 1238 | static void lec_arp_init(struct lec_priv *priv) |
1da177e4 | 1239 | { |
1fa9961d | 1240 | unsigned short i; |
1da177e4 | 1241 | |
c48192a7 | 1242 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) |
d0732f64 | 1243 | INIT_HLIST_HEAD(&priv->lec_arp_tables[i]); |
f7d57453 YH |
1244 | INIT_HLIST_HEAD(&priv->lec_arp_empty_ones); |
1245 | INIT_HLIST_HEAD(&priv->lec_no_forward); | |
1246 | INIT_HLIST_HEAD(&priv->mcast_fwds); | |
1da177e4 | 1247 | spin_lock_init(&priv->lec_arp_lock); |
c4028958 | 1248 | INIT_DELAYED_WORK(&priv->lec_arp_work, lec_arp_check_expire); |
987e46bd | 1249 | schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL); |
1da177e4 LT |
1250 | } |
1251 | ||
1fa9961d | 1252 | static void lec_arp_clear_vccs(struct lec_arp_table *entry) |
1da177e4 | 1253 | { |
1fa9961d | 1254 | if (entry->vcc) { |
1da177e4 LT |
1255 | struct atm_vcc *vcc = entry->vcc; |
1256 | struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); | |
1fa9961d | 1257 | struct net_device *dev = (struct net_device *)vcc->proto_data; |
1da177e4 | 1258 | |
1fa9961d | 1259 | vcc->pop = vpriv->old_pop; |
1da177e4 LT |
1260 | if (vpriv->xoff) |
1261 | netif_wake_queue(dev); | |
1262 | kfree(vpriv); | |
1263 | vcc->user_back = NULL; | |
1fa9961d | 1264 | vcc->push = entry->old_push; |
1da177e4 | 1265 | vcc_release_async(vcc, -EPIPE); |
d0732f64 | 1266 | entry->vcc = NULL; |
1fa9961d CW |
1267 | } |
1268 | if (entry->recv_vcc) { | |
1269 | entry->recv_vcc->push = entry->old_recv_push; | |
1da177e4 | 1270 | vcc_release_async(entry->recv_vcc, -EPIPE); |
1fa9961d CW |
1271 | entry->recv_vcc = NULL; |
1272 | } | |
1da177e4 LT |
1273 | } |
1274 | ||
1275 | /* | |
1276 | * Insert entry to lec_arp_table | |
1277 | * LANE2: Add to the end of the list to satisfy 8.1.13 | |
1278 | */ | |
1fa9961d | 1279 | static inline void |
d0732f64 | 1280 | lec_arp_add(struct lec_priv *priv, struct lec_arp_table *entry) |
1da177e4 | 1281 | { |
d0732f64 | 1282 | struct hlist_head *tmp; |
1fa9961d | 1283 | |
d0732f64 CW |
1284 | tmp = &priv->lec_arp_tables[HASH(entry->mac_addr[ETH_ALEN - 1])]; |
1285 | hlist_add_head(&entry->next, tmp); | |
1fa9961d | 1286 | |
99824461 | 1287 | pr_debug("Added entry:%pM\n", entry->mac_addr); |
1da177e4 LT |
1288 | } |
1289 | ||
1290 | /* | |
1291 | * Remove entry from lec_arp_table | |
1292 | */ | |
1fa9961d CW |
1293 | static int |
1294 | lec_arp_remove(struct lec_priv *priv, struct lec_arp_table *to_remove) | |
1da177e4 | 1295 | { |
d0732f64 CW |
1296 | struct lec_arp_table *entry; |
1297 | int i, remove_vcc = 1; | |
1fa9961d | 1298 | |
c48192a7 | 1299 | if (!to_remove) |
1fa9961d | 1300 | return -1; |
d0732f64 CW |
1301 | |
1302 | hlist_del(&to_remove->next); | |
1fa9961d CW |
1303 | del_timer(&to_remove->timer); |
1304 | ||
c48192a7 JP |
1305 | /* |
1306 | * If this is the only MAC connected to this VCC, | |
1307 | * also tear down the VCC | |
1308 | */ | |
1fa9961d CW |
1309 | if (to_remove->status >= ESI_FLUSH_PENDING) { |
1310 | /* | |
1311 | * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT | |
1312 | */ | |
d0732f64 | 1313 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
b67bfe0d | 1314 | hlist_for_each_entry(entry, |
c48192a7 | 1315 | &priv->lec_arp_tables[i], next) { |
d0732f64 CW |
1316 | if (memcmp(to_remove->atm_addr, |
1317 | entry->atm_addr, ATM_ESA_LEN) == 0) { | |
1fa9961d CW |
1318 | remove_vcc = 0; |
1319 | break; | |
1320 | } | |
1321 | } | |
1322 | } | |
1323 | if (remove_vcc) | |
1324 | lec_arp_clear_vccs(to_remove); | |
1325 | } | |
1326 | skb_queue_purge(&to_remove->tx_wait); /* FIXME: good place for this? */ | |
1327 | ||
99824461 | 1328 | pr_debug("Removed entry:%pM\n", to_remove->mac_addr); |
1fa9961d | 1329 | return 0; |
1da177e4 LT |
1330 | } |
1331 | ||
1332 | #if DEBUG_ARP_TABLE | |
36cbd3dc | 1333 | static const char *get_status_string(unsigned char st) |
1da177e4 | 1334 | { |
1fa9961d CW |
1335 | switch (st) { |
1336 | case ESI_UNKNOWN: | |
1337 | return "ESI_UNKNOWN"; | |
1338 | case ESI_ARP_PENDING: | |
1339 | return "ESI_ARP_PENDING"; | |
1340 | case ESI_VC_PENDING: | |
1341 | return "ESI_VC_PENDING"; | |
1342 | case ESI_FLUSH_PENDING: | |
1343 | return "ESI_FLUSH_PENDING"; | |
1344 | case ESI_FORWARD_DIRECT: | |
1345 | return "ESI_FORWARD_DIRECT"; | |
1fa9961d | 1346 | } |
c48192a7 | 1347 | return "<UNKNOWN>"; |
1da177e4 | 1348 | } |
1da177e4 | 1349 | |
1fa9961d | 1350 | static void dump_arp_table(struct lec_priv *priv) |
1da177e4 | 1351 | { |
1fa9961d | 1352 | struct lec_arp_table *rulla; |
d0732f64 CW |
1353 | char buf[256]; |
1354 | int i, j, offset; | |
1fa9961d | 1355 | |
c48192a7 | 1356 | pr_info("Dump %p:\n", priv); |
1fa9961d | 1357 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
b67bfe0d | 1358 | hlist_for_each_entry(rulla, |
c48192a7 | 1359 | &priv->lec_arp_tables[i], next) { |
d0732f64 CW |
1360 | offset = 0; |
1361 | offset += sprintf(buf, "%d: %p\n", i, rulla); | |
c48192a7 JP |
1362 | offset += sprintf(buf + offset, "Mac: %pM", |
1363 | rulla->mac_addr); | |
1364 | offset += sprintf(buf + offset, " Atm:"); | |
1fa9961d CW |
1365 | for (j = 0; j < ATM_ESA_LEN; j++) { |
1366 | offset += sprintf(buf + offset, | |
1367 | "%2.2x ", | |
1368 | rulla->atm_addr[j] & 0xff); | |
1369 | } | |
1370 | offset += sprintf(buf + offset, | |
1371 | "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", | |
1372 | rulla->vcc ? rulla->vcc->vpi : 0, | |
1373 | rulla->vcc ? rulla->vcc->vci : 0, | |
1374 | rulla->recv_vcc ? rulla->recv_vcc-> | |
1375 | vpi : 0, | |
1376 | rulla->recv_vcc ? rulla->recv_vcc-> | |
1377 | vci : 0, rulla->last_used, | |
1378 | rulla->timestamp, rulla->no_tries); | |
1379 | offset += | |
1380 | sprintf(buf + offset, | |
1381 | "Flags:%x, Packets_flooded:%x, Status: %s ", | |
1382 | rulla->flags, rulla->packets_flooded, | |
1383 | get_status_string(rulla->status)); | |
c48192a7 | 1384 | pr_info("%s\n", buf); |
1fa9961d | 1385 | } |
1fa9961d | 1386 | } |
d0732f64 CW |
1387 | |
1388 | if (!hlist_empty(&priv->lec_no_forward)) | |
c48192a7 | 1389 | pr_info("No forward\n"); |
b67bfe0d | 1390 | hlist_for_each_entry(rulla, &priv->lec_no_forward, next) { |
1fa9961d | 1391 | offset = 0; |
c48192a7 JP |
1392 | offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr); |
1393 | offset += sprintf(buf + offset, " Atm:"); | |
1fa9961d CW |
1394 | for (j = 0; j < ATM_ESA_LEN; j++) { |
1395 | offset += sprintf(buf + offset, "%2.2x ", | |
1396 | rulla->atm_addr[j] & 0xff); | |
1397 | } | |
1398 | offset += sprintf(buf + offset, | |
1399 | "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", | |
1400 | rulla->vcc ? rulla->vcc->vpi : 0, | |
1401 | rulla->vcc ? rulla->vcc->vci : 0, | |
1402 | rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, | |
1403 | rulla->recv_vcc ? rulla->recv_vcc->vci : 0, | |
1404 | rulla->last_used, | |
1405 | rulla->timestamp, rulla->no_tries); | |
1406 | offset += sprintf(buf + offset, | |
1407 | "Flags:%x, Packets_flooded:%x, Status: %s ", | |
1408 | rulla->flags, rulla->packets_flooded, | |
1409 | get_status_string(rulla->status)); | |
c48192a7 | 1410 | pr_info("%s\n", buf); |
1fa9961d | 1411 | } |
d0732f64 CW |
1412 | |
1413 | if (!hlist_empty(&priv->lec_arp_empty_ones)) | |
c48192a7 | 1414 | pr_info("Empty ones\n"); |
b67bfe0d | 1415 | hlist_for_each_entry(rulla, &priv->lec_arp_empty_ones, next) { |
1fa9961d | 1416 | offset = 0; |
c48192a7 JP |
1417 | offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr); |
1418 | offset += sprintf(buf + offset, " Atm:"); | |
1fa9961d CW |
1419 | for (j = 0; j < ATM_ESA_LEN; j++) { |
1420 | offset += sprintf(buf + offset, "%2.2x ", | |
1421 | rulla->atm_addr[j] & 0xff); | |
1422 | } | |
1423 | offset += sprintf(buf + offset, | |
1424 | "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", | |
1425 | rulla->vcc ? rulla->vcc->vpi : 0, | |
1426 | rulla->vcc ? rulla->vcc->vci : 0, | |
1427 | rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, | |
1428 | rulla->recv_vcc ? rulla->recv_vcc->vci : 0, | |
1429 | rulla->last_used, | |
1430 | rulla->timestamp, rulla->no_tries); | |
1431 | offset += sprintf(buf + offset, | |
1432 | "Flags:%x, Packets_flooded:%x, Status: %s ", | |
1433 | rulla->flags, rulla->packets_flooded, | |
1434 | get_status_string(rulla->status)); | |
c48192a7 | 1435 | pr_info("%s", buf); |
1fa9961d CW |
1436 | } |
1437 | ||
d0732f64 | 1438 | if (!hlist_empty(&priv->mcast_fwds)) |
c48192a7 | 1439 | pr_info("Multicast Forward VCCs\n"); |
b67bfe0d | 1440 | hlist_for_each_entry(rulla, &priv->mcast_fwds, next) { |
1fa9961d | 1441 | offset = 0; |
c48192a7 JP |
1442 | offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr); |
1443 | offset += sprintf(buf + offset, " Atm:"); | |
1fa9961d CW |
1444 | for (j = 0; j < ATM_ESA_LEN; j++) { |
1445 | offset += sprintf(buf + offset, "%2.2x ", | |
1446 | rulla->atm_addr[j] & 0xff); | |
1447 | } | |
1448 | offset += sprintf(buf + offset, | |
1449 | "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", | |
1450 | rulla->vcc ? rulla->vcc->vpi : 0, | |
1451 | rulla->vcc ? rulla->vcc->vci : 0, | |
1452 | rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, | |
1453 | rulla->recv_vcc ? rulla->recv_vcc->vci : 0, | |
1454 | rulla->last_used, | |
1455 | rulla->timestamp, rulla->no_tries); | |
1456 | offset += sprintf(buf + offset, | |
1457 | "Flags:%x, Packets_flooded:%x, Status: %s ", | |
1458 | rulla->flags, rulla->packets_flooded, | |
1459 | get_status_string(rulla->status)); | |
c48192a7 | 1460 | pr_info("%s\n", buf); |
1fa9961d | 1461 | } |
1da177e4 | 1462 | |
1da177e4 | 1463 | } |
d0732f64 CW |
1464 | #else |
1465 | #define dump_arp_table(priv) do { } while (0) | |
1466 | #endif | |
1da177e4 LT |
1467 | |
1468 | /* | |
1469 | * Destruction of arp-cache | |
1470 | */ | |
1fa9961d | 1471 | static void lec_arp_destroy(struct lec_priv *priv) |
1da177e4 LT |
1472 | { |
1473 | unsigned long flags; | |
b67bfe0d | 1474 | struct hlist_node *next; |
d0732f64 | 1475 | struct lec_arp_table *entry; |
1fa9961d CW |
1476 | int i; |
1477 | ||
afe2c511 | 1478 | cancel_delayed_work_sync(&priv->lec_arp_work); |
1da177e4 | 1479 | |
1fa9961d CW |
1480 | /* |
1481 | * Remove all entries | |
1482 | */ | |
1da177e4 LT |
1483 | |
1484 | spin_lock_irqsave(&priv->lec_arp_lock, flags); | |
1fa9961d | 1485 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
b67bfe0d | 1486 | hlist_for_each_entry_safe(entry, next, |
c48192a7 | 1487 | &priv->lec_arp_tables[i], next) { |
1fa9961d | 1488 | lec_arp_remove(priv, entry); |
33a9c2d4 | 1489 | lec_arp_put(entry); |
1fa9961d | 1490 | } |
d0732f64 | 1491 | INIT_HLIST_HEAD(&priv->lec_arp_tables[i]); |
1fa9961d | 1492 | } |
d0732f64 | 1493 | |
b67bfe0d | 1494 | hlist_for_each_entry_safe(entry, next, |
c48192a7 | 1495 | &priv->lec_arp_empty_ones, next) { |
1fa9961d CW |
1496 | del_timer_sync(&entry->timer); |
1497 | lec_arp_clear_vccs(entry); | |
d0732f64 | 1498 | hlist_del(&entry->next); |
33a9c2d4 | 1499 | lec_arp_put(entry); |
1fa9961d | 1500 | } |
d0732f64 CW |
1501 | INIT_HLIST_HEAD(&priv->lec_arp_empty_ones); |
1502 | ||
b67bfe0d | 1503 | hlist_for_each_entry_safe(entry, next, |
c48192a7 | 1504 | &priv->lec_no_forward, next) { |
1fa9961d CW |
1505 | del_timer_sync(&entry->timer); |
1506 | lec_arp_clear_vccs(entry); | |
d0732f64 | 1507 | hlist_del(&entry->next); |
33a9c2d4 | 1508 | lec_arp_put(entry); |
1fa9961d | 1509 | } |
d0732f64 CW |
1510 | INIT_HLIST_HEAD(&priv->lec_no_forward); |
1511 | ||
b67bfe0d | 1512 | hlist_for_each_entry_safe(entry, next, &priv->mcast_fwds, next) { |
1fa9961d CW |
1513 | /* No timer, LANEv2 7.1.20 and 2.3.5.3 */ |
1514 | lec_arp_clear_vccs(entry); | |
d0732f64 | 1515 | hlist_del(&entry->next); |
33a9c2d4 | 1516 | lec_arp_put(entry); |
1fa9961d | 1517 | } |
d0732f64 | 1518 | INIT_HLIST_HEAD(&priv->mcast_fwds); |
1fa9961d | 1519 | priv->mcast_vcc = NULL; |
1da177e4 LT |
1520 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
1521 | } | |
1522 | ||
f7d57453 | 1523 | /* |
1da177e4 LT |
1524 | * Find entry by mac_address |
1525 | */ | |
1fa9961d | 1526 | static struct lec_arp_table *lec_arp_find(struct lec_priv *priv, |
61c33e01 | 1527 | const unsigned char *mac_addr) |
1da177e4 | 1528 | { |
d0732f64 CW |
1529 | struct hlist_head *head; |
1530 | struct lec_arp_table *entry; | |
1fa9961d | 1531 | |
99824461 | 1532 | pr_debug("%pM\n", mac_addr); |
1fa9961d | 1533 | |
d0732f64 | 1534 | head = &priv->lec_arp_tables[HASH(mac_addr[ETH_ALEN - 1])]; |
b67bfe0d | 1535 | hlist_for_each_entry(entry, head, next) { |
150238eb | 1536 | if (ether_addr_equal(mac_addr, entry->mac_addr)) |
d0732f64 | 1537 | return entry; |
1fa9961d CW |
1538 | } |
1539 | return NULL; | |
1da177e4 LT |
1540 | } |
1541 | ||
1fa9961d | 1542 | static struct lec_arp_table *make_entry(struct lec_priv *priv, |
61c33e01 | 1543 | const unsigned char *mac_addr) |
1da177e4 | 1544 | { |
1fa9961d CW |
1545 | struct lec_arp_table *to_return; |
1546 | ||
1547 | to_return = kzalloc(sizeof(struct lec_arp_table), GFP_ATOMIC); | |
1548 | if (!to_return) { | |
c48192a7 | 1549 | pr_info("LEC: Arp entry kmalloc failed\n"); |
1fa9961d CW |
1550 | return NULL; |
1551 | } | |
116e853f | 1552 | ether_addr_copy(to_return->mac_addr, mac_addr); |
d0732f64 | 1553 | INIT_HLIST_NODE(&to_return->next); |
ba421793 | 1554 | timer_setup(&to_return->timer, lec_arp_expire_arp, 0); |
1fa9961d CW |
1555 | to_return->last_used = jiffies; |
1556 | to_return->priv = priv; | |
1557 | skb_queue_head_init(&to_return->tx_wait); | |
78893664 | 1558 | refcount_set(&to_return->usage, 1); |
1fa9961d | 1559 | return to_return; |
1da177e4 LT |
1560 | } |
1561 | ||
1fa9961d | 1562 | /* Arp sent timer expired */ |
ba421793 | 1563 | static void lec_arp_expire_arp(struct timer_list *t) |
1da177e4 | 1564 | { |
1fa9961d CW |
1565 | struct lec_arp_table *entry; |
1566 | ||
ba421793 | 1567 | entry = from_timer(entry, t, timer); |
1fa9961d | 1568 | |
99824461 | 1569 | pr_debug("\n"); |
1fa9961d CW |
1570 | if (entry->status == ESI_ARP_PENDING) { |
1571 | if (entry->no_tries <= entry->priv->max_retry_count) { | |
1572 | if (entry->is_rdesc) | |
1573 | send_to_lecd(entry->priv, l_rdesc_arp_xmt, | |
1574 | entry->mac_addr, NULL, NULL); | |
1575 | else | |
1576 | send_to_lecd(entry->priv, l_arp_xmt, | |
1577 | entry->mac_addr, NULL, NULL); | |
1578 | entry->no_tries++; | |
1579 | } | |
1580 | mod_timer(&entry->timer, jiffies + (1 * HZ)); | |
1581 | } | |
1da177e4 LT |
1582 | } |
1583 | ||
1fa9961d | 1584 | /* Unknown/unused vcc expire, remove associated entry */ |
ba421793 | 1585 | static void lec_arp_expire_vcc(struct timer_list *t) |
1da177e4 LT |
1586 | { |
1587 | unsigned long flags; | |
ba421793 | 1588 | struct lec_arp_table *to_remove = from_timer(to_remove, t, timer); |
e3192690 | 1589 | struct lec_priv *priv = to_remove->priv; |
1da177e4 | 1590 | |
1fa9961d | 1591 | del_timer(&to_remove->timer); |
1da177e4 | 1592 | |
99824461 JP |
1593 | pr_debug("%p %p: vpi:%d vci:%d\n", |
1594 | to_remove, priv, | |
1595 | to_remove->vcc ? to_remove->recv_vcc->vpi : 0, | |
1596 | to_remove->vcc ? to_remove->recv_vcc->vci : 0); | |
1da177e4 LT |
1597 | |
1598 | spin_lock_irqsave(&priv->lec_arp_lock, flags); | |
d0732f64 | 1599 | hlist_del(&to_remove->next); |
1da177e4 LT |
1600 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
1601 | ||
1fa9961d | 1602 | lec_arp_clear_vccs(to_remove); |
33a9c2d4 | 1603 | lec_arp_put(to_remove); |
1da177e4 LT |
1604 | } |
1605 | ||
b4c84ec0 JP |
1606 | static bool __lec_arp_check_expire(struct lec_arp_table *entry, |
1607 | unsigned long now, | |
1608 | struct lec_priv *priv) | |
1609 | { | |
1610 | unsigned long time_to_check; | |
1611 | ||
1612 | if ((entry->flags) & LEC_REMOTE_FLAG && priv->topology_change) | |
1613 | time_to_check = priv->forward_delay_time; | |
1614 | else | |
1615 | time_to_check = priv->aging_time; | |
1616 | ||
1617 | pr_debug("About to expire: %lx - %lx > %lx\n", | |
1618 | now, entry->last_used, time_to_check); | |
1619 | if (time_after(now, entry->last_used + time_to_check) && | |
1620 | !(entry->flags & LEC_PERMANENT_FLAG) && | |
1621 | !(entry->mac_addr[0] & 0x01)) { /* LANE2: 7.1.20 */ | |
1622 | /* Remove entry */ | |
1623 | pr_debug("Entry timed out\n"); | |
1624 | lec_arp_remove(priv, entry); | |
1625 | lec_arp_put(entry); | |
1626 | } else { | |
1627 | /* Something else */ | |
1628 | if ((entry->status == ESI_VC_PENDING || | |
1629 | entry->status == ESI_ARP_PENDING) && | |
1630 | time_after_eq(now, entry->timestamp + | |
1631 | priv->max_unknown_frame_time)) { | |
1632 | entry->timestamp = jiffies; | |
1633 | entry->packets_flooded = 0; | |
1634 | if (entry->status == ESI_VC_PENDING) | |
1635 | send_to_lecd(priv, l_svc_setup, | |
1636 | entry->mac_addr, | |
1637 | entry->atm_addr, | |
1638 | NULL); | |
1639 | } | |
1640 | if (entry->status == ESI_FLUSH_PENDING && | |
1641 | time_after_eq(now, entry->timestamp + | |
1642 | priv->path_switching_delay)) { | |
1643 | lec_arp_hold(entry); | |
1644 | return true; | |
1645 | } | |
1646 | } | |
1647 | ||
1648 | return false; | |
1649 | } | |
1da177e4 LT |
1650 | /* |
1651 | * Expire entries. | |
1652 | * 1. Re-set timer | |
1653 | * 2. For each entry, delete entries that have aged past the age limit. | |
1654 | * 3. For each entry, depending on the status of the entry, perform | |
1655 | * the following maintenance. | |
1656 | * a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the | |
1657 | * tick_count is above the max_unknown_frame_time, clear | |
1658 | * the tick_count to zero and clear the packets_flooded counter | |
1659 | * to zero. This supports the packet rate limit per address | |
1660 | * while flooding unknowns. | |
1661 | * b. If the status is ESI_FLUSH_PENDING and the tick_count is greater | |
1662 | * than or equal to the path_switching_delay, change the status | |
1663 | * to ESI_FORWARD_DIRECT. This causes the flush period to end | |
1664 | * regardless of the progress of the flush protocol. | |
1665 | */ | |
c4028958 | 1666 | static void lec_arp_check_expire(struct work_struct *work) |
1da177e4 LT |
1667 | { |
1668 | unsigned long flags; | |
c4028958 DH |
1669 | struct lec_priv *priv = |
1670 | container_of(work, struct lec_priv, lec_arp_work.work); | |
b67bfe0d | 1671 | struct hlist_node *next; |
d0732f64 | 1672 | struct lec_arp_table *entry; |
1fa9961d | 1673 | unsigned long now; |
1fa9961d CW |
1674 | int i; |
1675 | ||
99824461 | 1676 | pr_debug("%p\n", priv); |
1da177e4 | 1677 | now = jiffies; |
6656e3c4 | 1678 | restart: |
1da177e4 | 1679 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
1fa9961d | 1680 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
b67bfe0d | 1681 | hlist_for_each_entry_safe(entry, next, |
c48192a7 | 1682 | &priv->lec_arp_tables[i], next) { |
b4c84ec0 JP |
1683 | if (__lec_arp_check_expire(entry, now, priv)) { |
1684 | struct sk_buff *skb; | |
1685 | struct atm_vcc *vcc = entry->vcc; | |
1686 | ||
1687 | spin_unlock_irqrestore(&priv->lec_arp_lock, | |
1688 | flags); | |
1689 | while ((skb = skb_dequeue(&entry->tx_wait))) | |
1690 | lec_send(vcc, skb); | |
1691 | entry->last_used = jiffies; | |
1692 | entry->status = ESI_FORWARD_DIRECT; | |
33a9c2d4 | 1693 | lec_arp_put(entry); |
b4c84ec0 JP |
1694 | |
1695 | goto restart; | |
1da177e4 LT |
1696 | } |
1697 | } | |
1698 | } | |
1699 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); | |
1700 | ||
987e46bd | 1701 | schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL); |
1da177e4 | 1702 | } |
1fa9961d | 1703 | |
1da177e4 LT |
1704 | /* |
1705 | * Try to find vcc where mac_address is attached. | |
f7d57453 | 1706 | * |
1da177e4 | 1707 | */ |
1fa9961d | 1708 | static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv, |
c48192a7 JP |
1709 | const unsigned char *mac_to_find, |
1710 | int is_rdesc, | |
1fa9961d | 1711 | struct lec_arp_table **ret_entry) |
1da177e4 LT |
1712 | { |
1713 | unsigned long flags; | |
1fa9961d | 1714 | struct lec_arp_table *entry; |
1da177e4 LT |
1715 | struct atm_vcc *found; |
1716 | ||
1fa9961d CW |
1717 | if (mac_to_find[0] & 0x01) { |
1718 | switch (priv->lane_version) { | |
1719 | case 1: | |
1720 | return priv->mcast_vcc; | |
1fa9961d | 1721 | case 2: /* LANE2 wants arp for multicast addresses */ |
150238eb | 1722 | if (ether_addr_equal(mac_to_find, bus_mac)) |
1fa9961d CW |
1723 | return priv->mcast_vcc; |
1724 | break; | |
1725 | default: | |
1726 | break; | |
1727 | } | |
1728 | } | |
1da177e4 LT |
1729 | |
1730 | spin_lock_irqsave(&priv->lec_arp_lock, flags); | |
1fa9961d CW |
1731 | entry = lec_arp_find(priv, mac_to_find); |
1732 | ||
1733 | if (entry) { | |
1734 | if (entry->status == ESI_FORWARD_DIRECT) { | |
1735 | /* Connection Ok */ | |
1736 | entry->last_used = jiffies; | |
6656e3c4 | 1737 | lec_arp_hold(entry); |
1fa9961d CW |
1738 | *ret_entry = entry; |
1739 | found = entry->vcc; | |
1da177e4 | 1740 | goto out; |
1fa9961d CW |
1741 | } |
1742 | /* | |
1743 | * If the LE_ARP cache entry is still pending, reset count to 0 | |
75b895c1 ST |
1744 | * so another LE_ARP request can be made for this frame. |
1745 | */ | |
c48192a7 | 1746 | if (entry->status == ESI_ARP_PENDING) |
75b895c1 | 1747 | entry->no_tries = 0; |
1fa9961d CW |
1748 | /* |
1749 | * Data direct VC not yet set up, check to see if the unknown | |
1750 | * frame count is greater than the limit. If the limit has | |
1751 | * not been reached, allow the caller to send packet to | |
1752 | * BUS. | |
1753 | */ | |
1754 | if (entry->status != ESI_FLUSH_PENDING && | |
1755 | entry->packets_flooded < | |
1756 | priv->maximum_unknown_frame_count) { | |
1757 | entry->packets_flooded++; | |
99824461 | 1758 | pr_debug("Flooding..\n"); |
1fa9961d | 1759 | found = priv->mcast_vcc; |
1da177e4 | 1760 | goto out; |
1fa9961d CW |
1761 | } |
1762 | /* | |
1763 | * We got here because entry->status == ESI_FLUSH_PENDING | |
1da177e4 LT |
1764 | * or BUS flood limit was reached for an entry which is |
1765 | * in ESI_ARP_PENDING or ESI_VC_PENDING state. | |
1766 | */ | |
6656e3c4 | 1767 | lec_arp_hold(entry); |
1fa9961d | 1768 | *ret_entry = entry; |
99824461 JP |
1769 | pr_debug("entry->status %d entry->vcc %p\n", entry->status, |
1770 | entry->vcc); | |
1fa9961d CW |
1771 | found = NULL; |
1772 | } else { | |
1773 | /* No matching entry was found */ | |
1774 | entry = make_entry(priv, mac_to_find); | |
99824461 | 1775 | pr_debug("Making entry\n"); |
1fa9961d CW |
1776 | if (!entry) { |
1777 | found = priv->mcast_vcc; | |
1da177e4 | 1778 | goto out; |
1fa9961d CW |
1779 | } |
1780 | lec_arp_add(priv, entry); | |
1781 | /* We want arp-request(s) to be sent */ | |
1782 | entry->packets_flooded = 1; | |
1783 | entry->status = ESI_ARP_PENDING; | |
1784 | entry->no_tries = 1; | |
1785 | entry->last_used = entry->timestamp = jiffies; | |
1786 | entry->is_rdesc = is_rdesc; | |
1787 | if (entry->is_rdesc) | |
1788 | send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL, | |
1789 | NULL); | |
1790 | else | |
1791 | send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL); | |
1792 | entry->timer.expires = jiffies + (1 * HZ); | |
841b86f3 | 1793 | entry->timer.function = lec_arp_expire_arp; |
1fa9961d CW |
1794 | add_timer(&entry->timer); |
1795 | found = priv->mcast_vcc; | |
1796 | } | |
1da177e4 LT |
1797 | |
1798 | out: | |
1799 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); | |
1800 | return found; | |
1801 | } | |
1802 | ||
1803 | static int | |
61c33e01 | 1804 | lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr, |
1fa9961d | 1805 | unsigned long permanent) |
1da177e4 LT |
1806 | { |
1807 | unsigned long flags; | |
b67bfe0d | 1808 | struct hlist_node *next; |
d0732f64 | 1809 | struct lec_arp_table *entry; |
1fa9961d | 1810 | int i; |
1da177e4 | 1811 | |
99824461 | 1812 | pr_debug("\n"); |
1da177e4 | 1813 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
1fa9961d | 1814 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
b67bfe0d | 1815 | hlist_for_each_entry_safe(entry, next, |
c48192a7 JP |
1816 | &priv->lec_arp_tables[i], next) { |
1817 | if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN) && | |
1818 | (permanent || | |
1819 | !(entry->flags & LEC_PERMANENT_FLAG))) { | |
1da177e4 | 1820 | lec_arp_remove(priv, entry); |
33a9c2d4 | 1821 | lec_arp_put(entry); |
1fa9961d | 1822 | } |
1da177e4 | 1823 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
1fa9961d CW |
1824 | return 0; |
1825 | } | |
1826 | } | |
1da177e4 | 1827 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
1fa9961d | 1828 | return -1; |
1da177e4 LT |
1829 | } |
1830 | ||
1831 | /* | |
f7d57453 | 1832 | * Notifies: Response to arp_request (atm_addr != NULL) |
1da177e4 LT |
1833 | */ |
1834 | static void | |
61c33e01 MBJ |
1835 | lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr, |
1836 | const unsigned char *atm_addr, unsigned long remoteflag, | |
1fa9961d | 1837 | unsigned int targetless_le_arp) |
1da177e4 LT |
1838 | { |
1839 | unsigned long flags; | |
b67bfe0d | 1840 | struct hlist_node *next; |
1fa9961d CW |
1841 | struct lec_arp_table *entry, *tmp; |
1842 | int i; | |
1da177e4 | 1843 | |
99824461 JP |
1844 | pr_debug("%smac:%pM\n", |
1845 | (targetless_le_arp) ? "targetless " : "", mac_addr); | |
1da177e4 LT |
1846 | |
1847 | spin_lock_irqsave(&priv->lec_arp_lock, flags); | |
1fa9961d CW |
1848 | entry = lec_arp_find(priv, mac_addr); |
1849 | if (entry == NULL && targetless_le_arp) | |
1850 | goto out; /* | |
1851 | * LANE2: ignore targetless LE_ARPs for which | |
1852 | * we have no entry in the cache. 7.1.30 | |
1853 | */ | |
d0732f64 | 1854 | if (!hlist_empty(&priv->lec_arp_empty_ones)) { |
b67bfe0d | 1855 | hlist_for_each_entry_safe(entry, next, |
c48192a7 | 1856 | &priv->lec_arp_empty_ones, next) { |
d0732f64 CW |
1857 | if (memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN) == 0) { |
1858 | hlist_del(&entry->next); | |
1fa9961d | 1859 | del_timer(&entry->timer); |
d0732f64 CW |
1860 | tmp = lec_arp_find(priv, mac_addr); |
1861 | if (tmp) { | |
1862 | del_timer(&tmp->timer); | |
1863 | tmp->status = ESI_FORWARD_DIRECT; | |
1864 | memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN); | |
1865 | tmp->vcc = entry->vcc; | |
1866 | tmp->old_push = entry->old_push; | |
1867 | tmp->last_used = jiffies; | |
1868 | del_timer(&entry->timer); | |
33a9c2d4 | 1869 | lec_arp_put(entry); |
d0732f64 CW |
1870 | entry = tmp; |
1871 | } else { | |
1872 | entry->status = ESI_FORWARD_DIRECT; | |
116e853f JP |
1873 | ether_addr_copy(entry->mac_addr, |
1874 | mac_addr); | |
d0732f64 CW |
1875 | entry->last_used = jiffies; |
1876 | lec_arp_add(priv, entry); | |
1877 | } | |
1878 | if (remoteflag) | |
1879 | entry->flags |= LEC_REMOTE_FLAG; | |
1880 | else | |
1881 | entry->flags &= ~LEC_REMOTE_FLAG; | |
52240062 | 1882 | pr_debug("After update\n"); |
d0732f64 CW |
1883 | dump_arp_table(priv); |
1884 | goto out; | |
1fa9961d | 1885 | } |
1fa9961d CW |
1886 | } |
1887 | } | |
d0732f64 | 1888 | |
1fa9961d CW |
1889 | entry = lec_arp_find(priv, mac_addr); |
1890 | if (!entry) { | |
1891 | entry = make_entry(priv, mac_addr); | |
1892 | if (!entry) | |
1893 | goto out; | |
1894 | entry->status = ESI_UNKNOWN; | |
1895 | lec_arp_add(priv, entry); | |
1896 | /* Temporary, changes before end of function */ | |
1897 | } | |
1898 | memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN); | |
1899 | del_timer(&entry->timer); | |
1900 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { | |
b67bfe0d | 1901 | hlist_for_each_entry(tmp, |
c48192a7 | 1902 | &priv->lec_arp_tables[i], next) { |
1fa9961d CW |
1903 | if (entry != tmp && |
1904 | !memcmp(tmp->atm_addr, atm_addr, ATM_ESA_LEN)) { | |
1905 | /* Vcc to this host exists */ | |
1906 | if (tmp->status > ESI_VC_PENDING) { | |
1907 | /* | |
1908 | * ESI_FLUSH_PENDING, | |
1909 | * ESI_FORWARD_DIRECT | |
1910 | */ | |
1911 | entry->vcc = tmp->vcc; | |
1912 | entry->old_push = tmp->old_push; | |
1913 | } | |
1914 | entry->status = tmp->status; | |
1915 | break; | |
1916 | } | |
1917 | } | |
1918 | } | |
1919 | if (remoteflag) | |
1920 | entry->flags |= LEC_REMOTE_FLAG; | |
1921 | else | |
1922 | entry->flags &= ~LEC_REMOTE_FLAG; | |
1923 | if (entry->status == ESI_ARP_PENDING || entry->status == ESI_UNKNOWN) { | |
1924 | entry->status = ESI_VC_PENDING; | |
d0732f64 | 1925 | send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL); |
1fa9961d | 1926 | } |
52240062 | 1927 | pr_debug("After update2\n"); |
1fa9961d | 1928 | dump_arp_table(priv); |
1da177e4 LT |
1929 | out: |
1930 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); | |
1931 | } | |
1932 | ||
1933 | /* | |
f7d57453 | 1934 | * Notifies: Vcc setup ready |
1da177e4 LT |
1935 | */ |
1936 | static void | |
61c33e01 | 1937 | lec_vcc_added(struct lec_priv *priv, const struct atmlec_ioc *ioc_data, |
1fa9961d CW |
1938 | struct atm_vcc *vcc, |
1939 | void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb)) | |
1da177e4 LT |
1940 | { |
1941 | unsigned long flags; | |
1fa9961d CW |
1942 | struct lec_arp_table *entry; |
1943 | int i, found_entry = 0; | |
1da177e4 LT |
1944 | |
1945 | spin_lock_irqsave(&priv->lec_arp_lock, flags); | |
c48192a7 | 1946 | /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */ |
1fa9961d | 1947 | if (ioc_data->receive == 2) { |
52240062 | 1948 | pr_debug("LEC_ARP: Attaching mcast forward\n"); |
1da177e4 | 1949 | #if 0 |
1fa9961d CW |
1950 | entry = lec_arp_find(priv, bus_mac); |
1951 | if (!entry) { | |
c48192a7 | 1952 | pr_info("LEC_ARP: Multicast entry not found!\n"); |
1da177e4 | 1953 | goto out; |
1fa9961d CW |
1954 | } |
1955 | memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); | |
1956 | entry->recv_vcc = vcc; | |
1957 | entry->old_recv_push = old_push; | |
1da177e4 | 1958 | #endif |
1fa9961d CW |
1959 | entry = make_entry(priv, bus_mac); |
1960 | if (entry == NULL) | |
1da177e4 | 1961 | goto out; |
1fa9961d CW |
1962 | del_timer(&entry->timer); |
1963 | memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); | |
1964 | entry->recv_vcc = vcc; | |
1965 | entry->old_recv_push = old_push; | |
d0732f64 | 1966 | hlist_add_head(&entry->next, &priv->mcast_fwds); |
1fa9961d CW |
1967 | goto out; |
1968 | } else if (ioc_data->receive == 1) { | |
1969 | /* | |
1970 | * Vcc which we don't want to make default vcc, | |
1971 | * attach it anyway. | |
1972 | */ | |
99824461 JP |
1973 | 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", |
1974 | ioc_data->atm_addr[0], ioc_data->atm_addr[1], | |
1975 | ioc_data->atm_addr[2], ioc_data->atm_addr[3], | |
1976 | ioc_data->atm_addr[4], ioc_data->atm_addr[5], | |
1977 | ioc_data->atm_addr[6], ioc_data->atm_addr[7], | |
1978 | ioc_data->atm_addr[8], ioc_data->atm_addr[9], | |
1979 | ioc_data->atm_addr[10], ioc_data->atm_addr[11], | |
1980 | ioc_data->atm_addr[12], ioc_data->atm_addr[13], | |
1981 | ioc_data->atm_addr[14], ioc_data->atm_addr[15], | |
1982 | ioc_data->atm_addr[16], ioc_data->atm_addr[17], | |
1983 | ioc_data->atm_addr[18], ioc_data->atm_addr[19]); | |
1fa9961d CW |
1984 | entry = make_entry(priv, bus_mac); |
1985 | if (entry == NULL) | |
1da177e4 | 1986 | goto out; |
1fa9961d | 1987 | memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); |
19ffa562 | 1988 | eth_zero_addr(entry->mac_addr); |
1fa9961d CW |
1989 | entry->recv_vcc = vcc; |
1990 | entry->old_recv_push = old_push; | |
1991 | entry->status = ESI_UNKNOWN; | |
1992 | entry->timer.expires = jiffies + priv->vcc_timeout_period; | |
841b86f3 | 1993 | entry->timer.function = lec_arp_expire_vcc; |
d0732f64 | 1994 | hlist_add_head(&entry->next, &priv->lec_no_forward); |
1fa9961d | 1995 | add_timer(&entry->timer); |
1da177e4 LT |
1996 | dump_arp_table(priv); |
1997 | goto out; | |
1fa9961d | 1998 | } |
99824461 JP |
1999 | 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", |
2000 | ioc_data->atm_addr[0], ioc_data->atm_addr[1], | |
2001 | ioc_data->atm_addr[2], ioc_data->atm_addr[3], | |
2002 | ioc_data->atm_addr[4], ioc_data->atm_addr[5], | |
2003 | ioc_data->atm_addr[6], ioc_data->atm_addr[7], | |
2004 | ioc_data->atm_addr[8], ioc_data->atm_addr[9], | |
2005 | ioc_data->atm_addr[10], ioc_data->atm_addr[11], | |
2006 | ioc_data->atm_addr[12], ioc_data->atm_addr[13], | |
2007 | ioc_data->atm_addr[14], ioc_data->atm_addr[15], | |
2008 | ioc_data->atm_addr[16], ioc_data->atm_addr[17], | |
2009 | ioc_data->atm_addr[18], ioc_data->atm_addr[19]); | |
1fa9961d | 2010 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
b67bfe0d | 2011 | hlist_for_each_entry(entry, |
c48192a7 | 2012 | &priv->lec_arp_tables[i], next) { |
1fa9961d CW |
2013 | if (memcmp |
2014 | (ioc_data->atm_addr, entry->atm_addr, | |
2015 | ATM_ESA_LEN) == 0) { | |
52240062 SH |
2016 | pr_debug("LEC_ARP: Attaching data direct\n"); |
2017 | pr_debug("Currently -> Vcc: %d, Rvcc:%d\n", | |
99824461 JP |
2018 | entry->vcc ? entry->vcc->vci : 0, |
2019 | entry->recv_vcc ? entry->recv_vcc-> | |
2020 | vci : 0); | |
1fa9961d CW |
2021 | found_entry = 1; |
2022 | del_timer(&entry->timer); | |
2023 | entry->vcc = vcc; | |
2024 | entry->old_push = old_push; | |
2025 | if (entry->status == ESI_VC_PENDING) { | |
2026 | if (priv->maximum_unknown_frame_count | |
2027 | == 0) | |
2028 | entry->status = | |
2029 | ESI_FORWARD_DIRECT; | |
2030 | else { | |
2031 | entry->timestamp = jiffies; | |
2032 | entry->status = | |
2033 | ESI_FLUSH_PENDING; | |
1da177e4 | 2034 | #if 0 |
1fa9961d CW |
2035 | send_to_lecd(priv, l_flush_xmt, |
2036 | NULL, | |
2037 | entry->atm_addr, | |
2038 | NULL); | |
1da177e4 | 2039 | #endif |
1fa9961d CW |
2040 | } |
2041 | } else { | |
2042 | /* | |
2043 | * They were forming a connection | |
2044 | * to us, and we to them. Our | |
2045 | * ATM address is numerically lower | |
2046 | * than theirs, so we make connection | |
2047 | * we formed into default VCC (8.1.11). | |
2048 | * Connection they made gets torn | |
2049 | * down. This might confuse some | |
2050 | * clients. Can be changed if | |
2051 | * someone reports trouble... | |
2052 | */ | |
2053 | ; | |
2054 | } | |
2055 | } | |
2056 | } | |
2057 | } | |
2058 | if (found_entry) { | |
52240062 | 2059 | pr_debug("After vcc was added\n"); |
1fa9961d | 2060 | dump_arp_table(priv); |
1da177e4 | 2061 | goto out; |
1fa9961d CW |
2062 | } |
2063 | /* | |
2064 | * Not found, snatch address from first data packet that arrives | |
2065 | * from this vcc | |
2066 | */ | |
2067 | entry = make_entry(priv, bus_mac); | |
2068 | if (!entry) | |
1da177e4 | 2069 | goto out; |
1fa9961d CW |
2070 | entry->vcc = vcc; |
2071 | entry->old_push = old_push; | |
2072 | memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); | |
19ffa562 | 2073 | eth_zero_addr(entry->mac_addr); |
1fa9961d | 2074 | entry->status = ESI_UNKNOWN; |
d0732f64 | 2075 | hlist_add_head(&entry->next, &priv->lec_arp_empty_ones); |
1fa9961d | 2076 | entry->timer.expires = jiffies + priv->vcc_timeout_period; |
841b86f3 | 2077 | entry->timer.function = lec_arp_expire_vcc; |
1fa9961d | 2078 | add_timer(&entry->timer); |
52240062 | 2079 | pr_debug("After vcc was added\n"); |
1da177e4 LT |
2080 | dump_arp_table(priv); |
2081 | out: | |
2082 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); | |
2083 | } | |
2084 | ||
1fa9961d | 2085 | static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id) |
1da177e4 LT |
2086 | { |
2087 | unsigned long flags; | |
1fa9961d CW |
2088 | struct lec_arp_table *entry; |
2089 | int i; | |
1da177e4 | 2090 | |
99824461 | 2091 | pr_debug("%lx\n", tran_id); |
6656e3c4 | 2092 | restart: |
1fa9961d CW |
2093 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
2094 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { | |
b67bfe0d | 2095 | hlist_for_each_entry(entry, |
c48192a7 JP |
2096 | &priv->lec_arp_tables[i], next) { |
2097 | if (entry->flush_tran_id == tran_id && | |
2098 | entry->status == ESI_FLUSH_PENDING) { | |
1fa9961d | 2099 | struct sk_buff *skb; |
6656e3c4 | 2100 | struct atm_vcc *vcc = entry->vcc; |
1fa9961d | 2101 | |
6656e3c4 | 2102 | lec_arp_hold(entry); |
c48192a7 JP |
2103 | spin_unlock_irqrestore(&priv->lec_arp_lock, |
2104 | flags); | |
b4c84ec0 | 2105 | while ((skb = skb_dequeue(&entry->tx_wait))) |
162619e5 | 2106 | lec_send(vcc, skb); |
6656e3c4 | 2107 | entry->last_used = jiffies; |
1fa9961d | 2108 | entry->status = ESI_FORWARD_DIRECT; |
6656e3c4 | 2109 | lec_arp_put(entry); |
52240062 | 2110 | pr_debug("LEC_ARP: Flushed\n"); |
6656e3c4 | 2111 | goto restart; |
1fa9961d CW |
2112 | } |
2113 | } | |
2114 | } | |
1da177e4 | 2115 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
1fa9961d | 2116 | dump_arp_table(priv); |
1da177e4 LT |
2117 | } |
2118 | ||
2119 | static void | |
2120 | lec_set_flush_tran_id(struct lec_priv *priv, | |
61c33e01 | 2121 | const unsigned char *atm_addr, unsigned long tran_id) |
1da177e4 LT |
2122 | { |
2123 | unsigned long flags; | |
1fa9961d CW |
2124 | struct lec_arp_table *entry; |
2125 | int i; | |
1da177e4 LT |
2126 | |
2127 | spin_lock_irqsave(&priv->lec_arp_lock, flags); | |
1fa9961d | 2128 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) |
b67bfe0d | 2129 | hlist_for_each_entry(entry, |
c48192a7 | 2130 | &priv->lec_arp_tables[i], next) { |
1fa9961d CW |
2131 | if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) { |
2132 | entry->flush_tran_id = tran_id; | |
52240062 | 2133 | pr_debug("Set flush transaction id to %lx for %p\n", |
99824461 | 2134 | tran_id, entry); |
1fa9961d | 2135 | } |
d0732f64 | 2136 | } |
1da177e4 LT |
2137 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
2138 | } | |
2139 | ||
1fa9961d | 2140 | static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc) |
1da177e4 LT |
2141 | { |
2142 | unsigned long flags; | |
1fa9961d CW |
2143 | unsigned char mac_addr[] = { |
2144 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff | |
2145 | }; | |
2146 | struct lec_arp_table *to_add; | |
1da177e4 LT |
2147 | struct lec_vcc_priv *vpriv; |
2148 | int err = 0; | |
1fa9961d | 2149 | |
c48192a7 JP |
2150 | vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL); |
2151 | if (!vpriv) | |
1da177e4 LT |
2152 | return -ENOMEM; |
2153 | vpriv->xoff = 0; | |
2154 | vpriv->old_pop = vcc->pop; | |
2155 | vcc->user_back = vpriv; | |
1fa9961d | 2156 | vcc->pop = lec_pop; |
1da177e4 | 2157 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
1fa9961d CW |
2158 | to_add = make_entry(priv, mac_addr); |
2159 | if (!to_add) { | |
1da177e4 LT |
2160 | vcc->pop = vpriv->old_pop; |
2161 | kfree(vpriv); | |
1fa9961d | 2162 | err = -ENOMEM; |
1da177e4 | 2163 | goto out; |
1fa9961d CW |
2164 | } |
2165 | memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN); | |
2166 | to_add->status = ESI_FORWARD_DIRECT; | |
2167 | to_add->flags |= LEC_PERMANENT_FLAG; | |
2168 | to_add->vcc = vcc; | |
2169 | to_add->old_push = vcc->push; | |
2170 | vcc->push = lec_push; | |
2171 | priv->mcast_vcc = vcc; | |
2172 | lec_arp_add(priv, to_add); | |
1da177e4 LT |
2173 | out: |
2174 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); | |
1fa9961d | 2175 | return err; |
1da177e4 LT |
2176 | } |
2177 | ||
1fa9961d | 2178 | static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc) |
1da177e4 LT |
2179 | { |
2180 | unsigned long flags; | |
b67bfe0d | 2181 | struct hlist_node *next; |
d0732f64 | 2182 | struct lec_arp_table *entry; |
1fa9961d | 2183 | int i; |
1da177e4 | 2184 | |
52240062 | 2185 | pr_debug("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n", vcc->vpi, vcc->vci); |
1fa9961d | 2186 | dump_arp_table(priv); |
d0732f64 | 2187 | |
1da177e4 | 2188 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
d0732f64 | 2189 | |
1fa9961d | 2190 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
b67bfe0d | 2191 | hlist_for_each_entry_safe(entry, next, |
c48192a7 | 2192 | &priv->lec_arp_tables[i], next) { |
1fa9961d CW |
2193 | if (vcc == entry->vcc) { |
2194 | lec_arp_remove(priv, entry); | |
33a9c2d4 | 2195 | lec_arp_put(entry); |
c48192a7 | 2196 | if (priv->mcast_vcc == vcc) |
1fa9961d | 2197 | priv->mcast_vcc = NULL; |
1fa9961d CW |
2198 | } |
2199 | } | |
2200 | } | |
2201 | ||
b67bfe0d | 2202 | hlist_for_each_entry_safe(entry, next, |
c48192a7 | 2203 | &priv->lec_arp_empty_ones, next) { |
d0732f64 | 2204 | if (entry->vcc == vcc) { |
1fa9961d CW |
2205 | lec_arp_clear_vccs(entry); |
2206 | del_timer(&entry->timer); | |
d0732f64 | 2207 | hlist_del(&entry->next); |
33a9c2d4 | 2208 | lec_arp_put(entry); |
1fa9961d | 2209 | } |
1fa9961d CW |
2210 | } |
2211 | ||
b67bfe0d | 2212 | hlist_for_each_entry_safe(entry, next, |
c48192a7 | 2213 | &priv->lec_no_forward, next) { |
1fa9961d CW |
2214 | if (entry->recv_vcc == vcc) { |
2215 | lec_arp_clear_vccs(entry); | |
2216 | del_timer(&entry->timer); | |
d0732f64 | 2217 | hlist_del(&entry->next); |
33a9c2d4 | 2218 | lec_arp_put(entry); |
1fa9961d | 2219 | } |
1fa9961d CW |
2220 | } |
2221 | ||
b67bfe0d | 2222 | hlist_for_each_entry_safe(entry, next, &priv->mcast_fwds, next) { |
1fa9961d CW |
2223 | if (entry->recv_vcc == vcc) { |
2224 | lec_arp_clear_vccs(entry); | |
2225 | /* No timer, LANEv2 7.1.20 and 2.3.5.3 */ | |
d0732f64 | 2226 | hlist_del(&entry->next); |
33a9c2d4 | 2227 | lec_arp_put(entry); |
1fa9961d | 2228 | } |
1fa9961d | 2229 | } |
1da177e4 LT |
2230 | |
2231 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); | |
2232 | dump_arp_table(priv); | |
2233 | } | |
2234 | ||
2235 | static void | |
2236 | lec_arp_check_empties(struct lec_priv *priv, | |
1fa9961d | 2237 | struct atm_vcc *vcc, struct sk_buff *skb) |
1da177e4 | 2238 | { |
1fa9961d | 2239 | unsigned long flags; |
b67bfe0d | 2240 | struct hlist_node *next; |
d0732f64 | 2241 | struct lec_arp_table *entry, *tmp; |
1fa9961d | 2242 | struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data; |
60eea6cf | 2243 | unsigned char *src = hdr->h_source; |
1da177e4 LT |
2244 | |
2245 | spin_lock_irqsave(&priv->lec_arp_lock, flags); | |
b67bfe0d | 2246 | hlist_for_each_entry_safe(entry, next, |
c48192a7 | 2247 | &priv->lec_arp_empty_ones, next) { |
d0732f64 CW |
2248 | if (vcc == entry->vcc) { |
2249 | del_timer(&entry->timer); | |
116e853f | 2250 | ether_addr_copy(entry->mac_addr, src); |
d0732f64 CW |
2251 | entry->status = ESI_FORWARD_DIRECT; |
2252 | entry->last_used = jiffies; | |
2253 | /* We might have got an entry */ | |
c48192a7 JP |
2254 | tmp = lec_arp_find(priv, src); |
2255 | if (tmp) { | |
d0732f64 | 2256 | lec_arp_remove(priv, tmp); |
33a9c2d4 | 2257 | lec_arp_put(tmp); |
d0732f64 CW |
2258 | } |
2259 | hlist_del(&entry->next); | |
2260 | lec_arp_add(priv, entry); | |
2261 | goto out; | |
1fa9961d | 2262 | } |
1fa9961d | 2263 | } |
52240062 | 2264 | pr_debug("LEC_ARP: Arp_check_empties: entry not found!\n"); |
1da177e4 LT |
2265 | out: |
2266 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); | |
2267 | } | |
1fa9961d | 2268 | |
1da177e4 | 2269 | MODULE_LICENSE("GPL"); |