Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* net/atm/clip.c - RFC1577 Classical IP over ATM */ |
2 | ||
3 | /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ | |
4 | ||
99824461 JP |
5 | #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__ |
6 | ||
1da177e4 LT |
7 | #include <linux/string.h> |
8 | #include <linux/errno.h> | |
9 | #include <linux/kernel.h> /* for UINT_MAX */ | |
10 | #include <linux/module.h> | |
11 | #include <linux/init.h> | |
12 | #include <linux/netdevice.h> | |
13 | #include <linux/skbuff.h> | |
14 | #include <linux/wait.h> | |
15 | #include <linux/timer.h> | |
16 | #include <linux/if_arp.h> /* for some manifest constants */ | |
17 | #include <linux/notifier.h> | |
18 | #include <linux/atm.h> | |
19 | #include <linux/atmdev.h> | |
20 | #include <linux/atmclip.h> | |
21 | #include <linux/atmarp.h> | |
4fc268d2 | 22 | #include <linux/capability.h> |
1da177e4 LT |
23 | #include <linux/ip.h> /* for net/route.h */ |
24 | #include <linux/in.h> /* for struct sockaddr_in */ | |
25 | #include <linux/if.h> /* for IFF_UP */ | |
26 | #include <linux/inetdevice.h> | |
27 | #include <linux/bitops.h> | |
4bdbf6c0 | 28 | #include <linux/poison.h> |
1da177e4 LT |
29 | #include <linux/proc_fs.h> |
30 | #include <linux/seq_file.h> | |
31 | #include <linux/rcupdate.h> | |
32 | #include <linux/jhash.h> | |
5a0e3ad6 | 33 | #include <linux/slab.h> |
1da177e4 LT |
34 | #include <net/route.h> /* for struct rtable and routing */ |
35 | #include <net/icmp.h> /* icmp_send */ | |
e956ea1b JP |
36 | #include <linux/param.h> /* for HZ */ |
37 | #include <linux/uaccess.h> | |
1da177e4 LT |
38 | #include <asm/byteorder.h> /* for htons etc. */ |
39 | #include <asm/system.h> /* save/restore_flags */ | |
60063497 | 40 | #include <linux/atomic.h> |
1da177e4 LT |
41 | |
42 | #include "common.h" | |
43 | #include "resources.h" | |
1da177e4 LT |
44 | #include <net/atmclip.h> |
45 | ||
1da177e4 LT |
46 | static struct net_device *clip_devs; |
47 | static struct atm_vcc *atmarpd; | |
48 | static struct neigh_table clip_tbl; | |
49 | static struct timer_list idle_timer; | |
1da177e4 | 50 | |
30d492da | 51 | static int to_atmarpd(enum atmarp_ctrl_type type, int itf, __be32 ip) |
1da177e4 LT |
52 | { |
53 | struct sock *sk; | |
54 | struct atmarp_ctrl *ctrl; | |
55 | struct sk_buff *skb; | |
56 | ||
99824461 | 57 | pr_debug("(%d)\n", type); |
e49e76db SH |
58 | if (!atmarpd) |
59 | return -EUNATCH; | |
e956ea1b | 60 | skb = alloc_skb(sizeof(struct atmarp_ctrl), GFP_ATOMIC); |
e49e76db SH |
61 | if (!skb) |
62 | return -ENOMEM; | |
e956ea1b | 63 | ctrl = (struct atmarp_ctrl *)skb_put(skb, sizeof(struct atmarp_ctrl)); |
1da177e4 LT |
64 | ctrl->type = type; |
65 | ctrl->itf_num = itf; | |
66 | ctrl->ip = ip; | |
e49e76db | 67 | atm_force_charge(atmarpd, skb->truesize); |
1da177e4 LT |
68 | |
69 | sk = sk_atm(atmarpd); | |
70 | skb_queue_tail(&sk->sk_receive_queue, skb); | |
71 | sk->sk_data_ready(sk, skb->len); | |
72 | return 0; | |
73 | } | |
74 | ||
e49e76db | 75 | static void link_vcc(struct clip_vcc *clip_vcc, struct atmarp_entry *entry) |
1da177e4 | 76 | { |
99824461 | 77 | pr_debug("%p to entry %p (neigh %p)\n", clip_vcc, entry, entry->neigh); |
1da177e4 | 78 | clip_vcc->entry = entry; |
e49e76db | 79 | clip_vcc->xoff = 0; /* @@@ may overrun buffer by one packet */ |
1da177e4 LT |
80 | clip_vcc->next = entry->vccs; |
81 | entry->vccs = clip_vcc; | |
82 | entry->neigh->used = jiffies; | |
83 | } | |
84 | ||
1da177e4 LT |
85 | static void unlink_clip_vcc(struct clip_vcc *clip_vcc) |
86 | { | |
87 | struct atmarp_entry *entry = clip_vcc->entry; | |
88 | struct clip_vcc **walk; | |
89 | ||
90 | if (!entry) { | |
99824461 | 91 | pr_crit("!clip_vcc->entry (clip_vcc %p)\n", clip_vcc); |
1da177e4 LT |
92 | return; |
93 | } | |
932ff279 | 94 | netif_tx_lock_bh(entry->neigh->dev); /* block clip_start_xmit() */ |
1da177e4 LT |
95 | entry->neigh->used = jiffies; |
96 | for (walk = &entry->vccs; *walk; walk = &(*walk)->next) | |
97 | if (*walk == clip_vcc) { | |
98 | int error; | |
99 | ||
e49e76db | 100 | *walk = clip_vcc->next; /* atomic */ |
1da177e4 LT |
101 | clip_vcc->entry = NULL; |
102 | if (clip_vcc->xoff) | |
103 | netif_wake_queue(entry->neigh->dev); | |
104 | if (entry->vccs) | |
105 | goto out; | |
e49e76db SH |
106 | entry->expires = jiffies - 1; |
107 | /* force resolution or expiration */ | |
1da177e4 LT |
108 | error = neigh_update(entry->neigh, NULL, NUD_NONE, |
109 | NEIGH_UPDATE_F_ADMIN); | |
110 | if (error) | |
99824461 | 111 | pr_crit("neigh_update failed with %d\n", error); |
1da177e4 LT |
112 | goto out; |
113 | } | |
99824461 | 114 | pr_crit("ATMARP: failed (entry %p, vcc 0x%p)\n", entry, clip_vcc); |
e956ea1b | 115 | out: |
932ff279 | 116 | netif_tx_unlock_bh(entry->neigh->dev); |
1da177e4 LT |
117 | } |
118 | ||
119 | /* The neighbour entry n->lock is held. */ | |
120 | static int neigh_check_cb(struct neighbour *n) | |
121 | { | |
869759b9 | 122 | struct atmarp_entry *entry = neighbour_priv(n); |
1da177e4 LT |
123 | struct clip_vcc *cv; |
124 | ||
125 | for (cv = entry->vccs; cv; cv = cv->next) { | |
126 | unsigned long exp = cv->last_use + cv->idle_timeout; | |
127 | ||
128 | if (cv->idle_timeout && time_after(jiffies, exp)) { | |
52240062 | 129 | pr_debug("releasing vcc %p->%p of entry %p\n", |
99824461 | 130 | cv, cv->vcc, entry); |
1da177e4 LT |
131 | vcc_release_async(cv->vcc, -ETIMEDOUT); |
132 | } | |
133 | } | |
134 | ||
135 | if (entry->vccs || time_before(jiffies, entry->expires)) | |
136 | return 0; | |
137 | ||
138 | if (atomic_read(&n->refcnt) > 1) { | |
139 | struct sk_buff *skb; | |
140 | ||
52240062 | 141 | pr_debug("destruction postponed with ref %d\n", |
99824461 | 142 | atomic_read(&n->refcnt)); |
1da177e4 | 143 | |
e49e76db | 144 | while ((skb = skb_dequeue(&n->arp_queue)) != NULL) |
1da177e4 LT |
145 | dev_kfree_skb(skb); |
146 | ||
147 | return 0; | |
148 | } | |
149 | ||
52240062 | 150 | pr_debug("expired neigh %p\n", n); |
1da177e4 LT |
151 | return 1; |
152 | } | |
153 | ||
154 | static void idle_timer_check(unsigned long dummy) | |
155 | { | |
156 | write_lock(&clip_tbl.lock); | |
157 | __neigh_for_each_release(&clip_tbl, neigh_check_cb); | |
e49e76db | 158 | mod_timer(&idle_timer, jiffies + CLIP_CHECK_INTERVAL * HZ); |
1da177e4 LT |
159 | write_unlock(&clip_tbl.lock); |
160 | } | |
161 | ||
162 | static int clip_arp_rcv(struct sk_buff *skb) | |
163 | { | |
164 | struct atm_vcc *vcc; | |
165 | ||
99824461 | 166 | pr_debug("\n"); |
1da177e4 | 167 | vcc = ATM_SKB(skb)->vcc; |
e49e76db | 168 | if (!vcc || !atm_charge(vcc, skb->truesize)) { |
1da177e4 LT |
169 | dev_kfree_skb_any(skb); |
170 | return 0; | |
171 | } | |
52240062 SH |
172 | pr_debug("pushing to %p\n", vcc); |
173 | pr_debug("using %p\n", CLIP_VCC(vcc)->old_push); | |
e49e76db | 174 | CLIP_VCC(vcc)->old_push(vcc, skb); |
1da177e4 LT |
175 | return 0; |
176 | } | |
177 | ||
178 | static const unsigned char llc_oui[] = { | |
179 | 0xaa, /* DSAP: non-ISO */ | |
180 | 0xaa, /* SSAP: non-ISO */ | |
181 | 0x03, /* Ctrl: Unnumbered Information Command PDU */ | |
182 | 0x00, /* OUI: EtherType */ | |
183 | 0x00, | |
e49e76db SH |
184 | 0x00 |
185 | }; | |
1da177e4 | 186 | |
e49e76db | 187 | static void clip_push(struct atm_vcc *vcc, struct sk_buff *skb) |
1da177e4 LT |
188 | { |
189 | struct clip_vcc *clip_vcc = CLIP_VCC(vcc); | |
190 | ||
99824461 | 191 | pr_debug("\n"); |
3b829366 JBD |
192 | |
193 | if (!clip_devs) { | |
194 | atm_return(vcc, skb->truesize); | |
195 | kfree_skb(skb); | |
196 | return; | |
197 | } | |
198 | ||
1da177e4 | 199 | if (!skb) { |
52240062 | 200 | pr_debug("removing VCC %p\n", clip_vcc); |
e49e76db SH |
201 | if (clip_vcc->entry) |
202 | unlink_clip_vcc(clip_vcc); | |
203 | clip_vcc->old_push(vcc, NULL); /* pass on the bad news */ | |
1da177e4 LT |
204 | kfree(clip_vcc); |
205 | return; | |
206 | } | |
e49e76db | 207 | atm_return(vcc, skb->truesize); |
1da177e4 | 208 | skb->dev = clip_vcc->entry ? clip_vcc->entry->neigh->dev : clip_devs; |
e49e76db | 209 | /* clip_vcc->entry == NULL if we don't have an IP address yet */ |
1da177e4 LT |
210 | if (!skb->dev) { |
211 | dev_kfree_skb_any(skb); | |
212 | return; | |
213 | } | |
214 | ATM_SKB(skb)->vcc = vcc; | |
459a98ed | 215 | skb_reset_mac_header(skb); |
e956ea1b JP |
216 | if (!clip_vcc->encap || |
217 | skb->len < RFC1483LLC_LEN || | |
218 | memcmp(skb->data, llc_oui, sizeof(llc_oui))) | |
e49e76db | 219 | skb->protocol = htons(ETH_P_IP); |
1da177e4 | 220 | else { |
e956ea1b | 221 | skb->protocol = ((__be16 *)skb->data)[3]; |
e49e76db | 222 | skb_pull(skb, RFC1483LLC_LEN); |
1da177e4 | 223 | if (skb->protocol == htons(ETH_P_ARP)) { |
1a6afe8a SH |
224 | skb->dev->stats.rx_packets++; |
225 | skb->dev->stats.rx_bytes += skb->len; | |
1da177e4 LT |
226 | clip_arp_rcv(skb); |
227 | return; | |
228 | } | |
229 | } | |
230 | clip_vcc->last_use = jiffies; | |
1a6afe8a SH |
231 | skb->dev->stats.rx_packets++; |
232 | skb->dev->stats.rx_bytes += skb->len; | |
1da177e4 LT |
233 | memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data)); |
234 | netif_rx(skb); | |
235 | } | |
236 | ||
1da177e4 LT |
237 | /* |
238 | * Note: these spinlocks _must_not_ block on non-SMP. The only goal is that | |
239 | * clip_pop is atomic with respect to the critical section in clip_start_xmit. | |
240 | */ | |
241 | ||
e49e76db | 242 | static void clip_pop(struct atm_vcc *vcc, struct sk_buff *skb) |
1da177e4 LT |
243 | { |
244 | struct clip_vcc *clip_vcc = CLIP_VCC(vcc); | |
245 | struct net_device *dev = skb->dev; | |
246 | int old; | |
247 | unsigned long flags; | |
248 | ||
99824461 | 249 | pr_debug("(vcc %p)\n", vcc); |
e49e76db | 250 | clip_vcc->old_pop(vcc, skb); |
1da177e4 | 251 | /* skb->dev == NULL in outbound ARP packets */ |
e49e76db SH |
252 | if (!dev) |
253 | return; | |
254 | spin_lock_irqsave(&PRIV(dev)->xoff_lock, flags); | |
255 | if (atm_may_send(vcc, 0)) { | |
256 | old = xchg(&clip_vcc->xoff, 0); | |
257 | if (old) | |
258 | netif_wake_queue(dev); | |
1da177e4 | 259 | } |
e49e76db | 260 | spin_unlock_irqrestore(&PRIV(dev)->xoff_lock, flags); |
1da177e4 LT |
261 | } |
262 | ||
e49e76db | 263 | static void clip_neigh_solicit(struct neighbour *neigh, struct sk_buff *skb) |
1da177e4 | 264 | { |
869759b9 DM |
265 | __be32 *ip = (__be32 *) neigh->primary_key; |
266 | ||
99824461 | 267 | pr_debug("(neigh %p, skb %p)\n", neigh, skb); |
869759b9 | 268 | to_atmarpd(act_need, PRIV(neigh->dev)->number, *ip); |
1da177e4 LT |
269 | } |
270 | ||
e49e76db | 271 | static void clip_neigh_error(struct neighbour *neigh, struct sk_buff *skb) |
1da177e4 LT |
272 | { |
273 | #ifndef CONFIG_ATM_CLIP_NO_ICMP | |
e49e76db | 274 | icmp_send(skb, ICMP_DEST_UNREACH, ICMP_HOST_UNREACH, 0); |
1da177e4 LT |
275 | #endif |
276 | kfree_skb(skb); | |
277 | } | |
278 | ||
89d69d2b | 279 | static const struct neigh_ops clip_neigh_ops = { |
1da177e4 | 280 | .family = AF_INET, |
1da177e4 LT |
281 | .solicit = clip_neigh_solicit, |
282 | .error_report = clip_neigh_error, | |
8f40b161 DM |
283 | .output = neigh_direct_output, |
284 | .connected_output = neigh_direct_output, | |
1da177e4 LT |
285 | }; |
286 | ||
1da177e4 LT |
287 | static int clip_constructor(struct neighbour *neigh) |
288 | { | |
869759b9 | 289 | struct atmarp_entry *entry = neighbour_priv(neigh); |
1da177e4 LT |
290 | struct net_device *dev = neigh->dev; |
291 | struct in_device *in_dev; | |
292 | struct neigh_parms *parms; | |
293 | ||
99824461 | 294 | pr_debug("(neigh %p, entry %p)\n", neigh, entry); |
869759b9 | 295 | neigh->type = inet_addr_type(&init_net, *((__be32 *) neigh->primary_key)); |
e49e76db SH |
296 | if (neigh->type != RTN_UNICAST) |
297 | return -EINVAL; | |
1da177e4 LT |
298 | |
299 | rcu_read_lock(); | |
e5ed6399 | 300 | in_dev = __in_dev_get_rcu(dev); |
1da177e4 LT |
301 | if (!in_dev) { |
302 | rcu_read_unlock(); | |
303 | return -EINVAL; | |
304 | } | |
305 | ||
306 | parms = in_dev->arp_parms; | |
307 | __neigh_parms_put(neigh->parms); | |
308 | neigh->parms = neigh_parms_clone(parms); | |
309 | rcu_read_unlock(); | |
310 | ||
311 | neigh->ops = &clip_neigh_ops; | |
312 | neigh->output = neigh->nud_state & NUD_VALID ? | |
313 | neigh->ops->connected_output : neigh->ops->output; | |
314 | entry->neigh = neigh; | |
315 | entry->vccs = NULL; | |
e49e76db | 316 | entry->expires = jiffies - 1; |
1da177e4 LT |
317 | return 0; |
318 | } | |
319 | ||
d6bf7817 | 320 | static u32 clip_hash(const void *pkey, const struct net_device *dev, __u32 rnd) |
1da177e4 | 321 | { |
d6bf7817 | 322 | return jhash_2words(*(u32 *) pkey, dev->ifindex, rnd); |
1da177e4 LT |
323 | } |
324 | ||
325 | static struct neigh_table clip_tbl = { | |
326 | .family = AF_INET, | |
1da177e4 LT |
327 | .key_len = 4, |
328 | .hash = clip_hash, | |
329 | .constructor = clip_constructor, | |
330 | .id = "clip_arp_cache", | |
331 | ||
332 | /* parameters are copied from ARP ... */ | |
333 | .parms = { | |
334 | .tbl = &clip_tbl, | |
335 | .base_reachable_time = 30 * HZ, | |
336 | .retrans_time = 1 * HZ, | |
337 | .gc_staletime = 60 * HZ, | |
338 | .reachable_time = 30 * HZ, | |
339 | .delay_probe_time = 5 * HZ, | |
8b5c171b | 340 | .queue_len_bytes = 64 * 1024, |
1da177e4 LT |
341 | .ucast_probes = 3, |
342 | .mcast_probes = 3, | |
343 | .anycast_delay = 1 * HZ, | |
344 | .proxy_delay = (8 * HZ) / 10, | |
345 | .proxy_qlen = 64, | |
346 | .locktime = 1 * HZ, | |
347 | }, | |
348 | .gc_interval = 30 * HZ, | |
349 | .gc_thresh1 = 128, | |
350 | .gc_thresh2 = 512, | |
351 | .gc_thresh3 = 1024, | |
352 | }; | |
353 | ||
1da177e4 LT |
354 | /* @@@ copy bh locking from arp.c -- need to bh-enable atm code before */ |
355 | ||
356 | /* | |
357 | * We play with the resolve flag: 0 and 1 have the usual meaning, but -1 means | |
358 | * to allocate the neighbour entry but not to ask atmarpd for resolution. Also, | |
359 | * don't increment the usage count. This is used to create entries in | |
360 | * clip_setentry. | |
361 | */ | |
362 | ||
e49e76db | 363 | static int clip_encap(struct atm_vcc *vcc, int mode) |
1da177e4 LT |
364 | { |
365 | CLIP_VCC(vcc)->encap = mode; | |
366 | return 0; | |
367 | } | |
368 | ||
3c805a22 SH |
369 | static netdev_tx_t clip_start_xmit(struct sk_buff *skb, |
370 | struct net_device *dev) | |
1da177e4 LT |
371 | { |
372 | struct clip_priv *clip_priv = PRIV(dev); | |
69cce1d1 | 373 | struct dst_entry *dst = skb_dst(skb); |
1da177e4 | 374 | struct atmarp_entry *entry; |
69cce1d1 | 375 | struct neighbour *n; |
1da177e4 LT |
376 | struct atm_vcc *vcc; |
377 | int old; | |
378 | unsigned long flags; | |
379 | ||
99824461 | 380 | pr_debug("(skb %p)\n", skb); |
69cce1d1 | 381 | if (!dst) { |
99824461 | 382 | pr_err("skb_dst(skb) == NULL\n"); |
1da177e4 | 383 | dev_kfree_skb(skb); |
1a6afe8a | 384 | dev->stats.tx_dropped++; |
6ed10654 | 385 | return NETDEV_TX_OK; |
1da177e4 | 386 | } |
69cce1d1 DM |
387 | n = dst_get_neighbour(dst); |
388 | if (!n) { | |
1da177e4 | 389 | #if 0 |
69cce1d1 DM |
390 | n = clip_find_neighbour(skb_dst(skb), 1); |
391 | if (!n) { | |
e49e76db | 392 | dev_kfree_skb(skb); /* lost that one */ |
1a6afe8a | 393 | dev->stats.tx_dropped++; |
1da177e4 LT |
394 | return 0; |
395 | } | |
69cce1d1 | 396 | dst_set_neighbour(dst, n); |
1da177e4 | 397 | #endif |
99824461 | 398 | pr_err("NO NEIGHBOUR !\n"); |
1da177e4 | 399 | dev_kfree_skb(skb); |
1a6afe8a | 400 | dev->stats.tx_dropped++; |
6ed10654 | 401 | return NETDEV_TX_OK; |
1da177e4 | 402 | } |
869759b9 | 403 | entry = neighbour_priv(n); |
1da177e4 LT |
404 | if (!entry->vccs) { |
405 | if (time_after(jiffies, entry->expires)) { | |
406 | /* should be resolved */ | |
e49e76db | 407 | entry->expires = jiffies + ATMARP_RETRY_DELAY * HZ; |
869759b9 | 408 | to_atmarpd(act_need, PRIV(dev)->number, *((__be32 *)n->primary_key)); |
1da177e4 LT |
409 | } |
410 | if (entry->neigh->arp_queue.qlen < ATMARP_MAX_UNRES_PACKETS) | |
e49e76db | 411 | skb_queue_tail(&entry->neigh->arp_queue, skb); |
1da177e4 LT |
412 | else { |
413 | dev_kfree_skb(skb); | |
1a6afe8a | 414 | dev->stats.tx_dropped++; |
1da177e4 | 415 | } |
6ed10654 | 416 | return NETDEV_TX_OK; |
1da177e4 | 417 | } |
52240062 | 418 | pr_debug("neigh %p, vccs %p\n", entry, entry->vccs); |
1da177e4 | 419 | ATM_SKB(skb)->vcc = vcc = entry->vccs->vcc; |
69cce1d1 | 420 | pr_debug("using neighbour %p, vcc %p\n", n, vcc); |
1da177e4 LT |
421 | if (entry->vccs->encap) { |
422 | void *here; | |
423 | ||
e49e76db SH |
424 | here = skb_push(skb, RFC1483LLC_LEN); |
425 | memcpy(here, llc_oui, sizeof(llc_oui)); | |
30d492da | 426 | ((__be16 *) here)[3] = skb->protocol; |
1da177e4 LT |
427 | } |
428 | atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); | |
429 | ATM_SKB(skb)->atm_options = vcc->atm_options; | |
430 | entry->vccs->last_use = jiffies; | |
52240062 | 431 | pr_debug("atm_skb(%p)->vcc(%p)->dev(%p)\n", skb, vcc, vcc->dev); |
e49e76db | 432 | old = xchg(&entry->vccs->xoff, 1); /* assume XOFF ... */ |
1da177e4 | 433 | if (old) { |
99824461 | 434 | pr_warning("XOFF->XOFF transition\n"); |
6ed10654 | 435 | return NETDEV_TX_OK; |
1da177e4 | 436 | } |
1a6afe8a SH |
437 | dev->stats.tx_packets++; |
438 | dev->stats.tx_bytes += skb->len; | |
5ff765f3 | 439 | vcc->send(vcc, skb); |
e49e76db | 440 | if (atm_may_send(vcc, 0)) { |
1da177e4 | 441 | entry->vccs->xoff = 0; |
6ed10654 | 442 | return NETDEV_TX_OK; |
1da177e4 | 443 | } |
e49e76db SH |
444 | spin_lock_irqsave(&clip_priv->xoff_lock, flags); |
445 | netif_stop_queue(dev); /* XOFF -> throttle immediately */ | |
1da177e4 LT |
446 | barrier(); |
447 | if (!entry->vccs->xoff) | |
448 | netif_start_queue(dev); | |
e49e76db SH |
449 | /* Oh, we just raced with clip_pop. netif_start_queue should be |
450 | good enough, because nothing should really be asleep because | |
451 | of the brief netif_stop_queue. If this isn't true or if it | |
452 | changes, use netif_wake_queue instead. */ | |
453 | spin_unlock_irqrestore(&clip_priv->xoff_lock, flags); | |
6ed10654 | 454 | return NETDEV_TX_OK; |
1da177e4 LT |
455 | } |
456 | ||
e49e76db | 457 | static int clip_mkip(struct atm_vcc *vcc, int timeout) |
1da177e4 LT |
458 | { |
459 | struct clip_vcc *clip_vcc; | |
1da177e4 | 460 | |
e49e76db SH |
461 | if (!vcc->push) |
462 | return -EBADFD; | |
463 | clip_vcc = kmalloc(sizeof(struct clip_vcc), GFP_KERNEL); | |
464 | if (!clip_vcc) | |
465 | return -ENOMEM; | |
99824461 | 466 | pr_debug("%p vcc %p\n", clip_vcc, vcc); |
1da177e4 LT |
467 | clip_vcc->vcc = vcc; |
468 | vcc->user_back = clip_vcc; | |
469 | set_bit(ATM_VF_IS_CLIP, &vcc->flags); | |
470 | clip_vcc->entry = NULL; | |
471 | clip_vcc->xoff = 0; | |
472 | clip_vcc->encap = 1; | |
473 | clip_vcc->last_use = jiffies; | |
e49e76db | 474 | clip_vcc->idle_timeout = timeout * HZ; |
1da177e4 LT |
475 | clip_vcc->old_push = vcc->push; |
476 | clip_vcc->old_pop = vcc->pop; | |
477 | vcc->push = clip_push; | |
478 | vcc->pop = clip_pop; | |
c40a27f4 | 479 | |
1da177e4 | 480 | /* re-process everything received between connection setup and MKIP */ |
4e55f578 | 481 | vcc_process_recv_queue(vcc); |
3b829366 | 482 | |
1da177e4 LT |
483 | return 0; |
484 | } | |
485 | ||
30d492da | 486 | static int clip_setentry(struct atm_vcc *vcc, __be32 ip) |
1da177e4 LT |
487 | { |
488 | struct neighbour *neigh; | |
489 | struct atmarp_entry *entry; | |
490 | int error; | |
491 | struct clip_vcc *clip_vcc; | |
1da177e4 LT |
492 | struct rtable *rt; |
493 | ||
494 | if (vcc->push != clip_push) { | |
99824461 | 495 | pr_warning("non-CLIP VCC\n"); |
1da177e4 LT |
496 | return -EBADF; |
497 | } | |
498 | clip_vcc = CLIP_VCC(vcc); | |
499 | if (!ip) { | |
500 | if (!clip_vcc->entry) { | |
99824461 | 501 | pr_err("hiding hidden ATMARP entry\n"); |
1da177e4 LT |
502 | return 0; |
503 | } | |
99824461 | 504 | pr_debug("remove\n"); |
1da177e4 LT |
505 | unlink_clip_vcc(clip_vcc); |
506 | return 0; | |
507 | } | |
78fbfd8a | 508 | rt = ip_route_output(&init_net, ip, 0, 1, 0); |
b23dd4fe DM |
509 | if (IS_ERR(rt)) |
510 | return PTR_ERR(rt); | |
d8d1f30b | 511 | neigh = __neigh_lookup(&clip_tbl, &ip, rt->dst.dev, 1); |
1da177e4 LT |
512 | ip_rt_put(rt); |
513 | if (!neigh) | |
514 | return -ENOMEM; | |
869759b9 | 515 | entry = neighbour_priv(neigh); |
1da177e4 | 516 | if (entry != clip_vcc->entry) { |
e49e76db | 517 | if (!clip_vcc->entry) |
99824461 | 518 | pr_debug("add\n"); |
1da177e4 | 519 | else { |
99824461 | 520 | pr_debug("update\n"); |
1da177e4 LT |
521 | unlink_clip_vcc(clip_vcc); |
522 | } | |
e49e76db | 523 | link_vcc(clip_vcc, entry); |
1da177e4 | 524 | } |
e49e76db SH |
525 | error = neigh_update(neigh, llc_oui, NUD_PERMANENT, |
526 | NEIGH_UPDATE_F_OVERRIDE | NEIGH_UPDATE_F_ADMIN); | |
1da177e4 LT |
527 | neigh_release(neigh); |
528 | return error; | |
529 | } | |
530 | ||
dde09758 SH |
531 | static const struct net_device_ops clip_netdev_ops = { |
532 | .ndo_start_xmit = clip_start_xmit, | |
533 | }; | |
534 | ||
1da177e4 LT |
535 | static void clip_setup(struct net_device *dev) |
536 | { | |
dde09758 | 537 | dev->netdev_ops = &clip_netdev_ops; |
1da177e4 | 538 | dev->type = ARPHRD_ATM; |
596b9b68 | 539 | dev->neigh_priv_len = sizeof(struct atmarp_entry); |
1da177e4 LT |
540 | dev->hard_header_len = RFC1483LLC_LEN; |
541 | dev->mtu = RFC1626_MTU; | |
e49e76db SH |
542 | dev->tx_queue_len = 100; /* "normal" queue (packets) */ |
543 | /* When using a "real" qdisc, the qdisc determines the queue */ | |
544 | /* length. tx_queue_len is only used for the default case, */ | |
545 | /* without any more elaborate queuing. 100 is a reasonable */ | |
546 | /* compromise between decent burst-tolerance and protection */ | |
547 | /* against memory hogs. */ | |
a489e51c | 548 | dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
1da177e4 LT |
549 | } |
550 | ||
1da177e4 LT |
551 | static int clip_create(int number) |
552 | { | |
553 | struct net_device *dev; | |
554 | struct clip_priv *clip_priv; | |
555 | int error; | |
556 | ||
557 | if (number != -1) { | |
558 | for (dev = clip_devs; dev; dev = PRIV(dev)->next) | |
e49e76db SH |
559 | if (PRIV(dev)->number == number) |
560 | return -EEXIST; | |
561 | } else { | |
1da177e4 LT |
562 | number = 0; |
563 | for (dev = clip_devs; dev; dev = PRIV(dev)->next) | |
564 | if (PRIV(dev)->number >= number) | |
e49e76db | 565 | number = PRIV(dev)->number + 1; |
1da177e4 LT |
566 | } |
567 | dev = alloc_netdev(sizeof(struct clip_priv), "", clip_setup); | |
568 | if (!dev) | |
569 | return -ENOMEM; | |
570 | clip_priv = PRIV(dev); | |
e49e76db | 571 | sprintf(dev->name, "atm%d", number); |
1da177e4 LT |
572 | spin_lock_init(&clip_priv->xoff_lock); |
573 | clip_priv->number = number; | |
574 | error = register_netdev(dev); | |
575 | if (error) { | |
576 | free_netdev(dev); | |
577 | return error; | |
578 | } | |
579 | clip_priv->next = clip_devs; | |
580 | clip_devs = dev; | |
52240062 | 581 | pr_debug("registered (net:%s)\n", dev->name); |
1da177e4 LT |
582 | return number; |
583 | } | |
584 | ||
e49e76db | 585 | static int clip_device_event(struct notifier_block *this, unsigned long event, |
f3a0592b | 586 | void *arg) |
1da177e4 | 587 | { |
f3a0592b SH |
588 | struct net_device *dev = arg; |
589 | ||
721499e8 | 590 | if (!net_eq(dev_net(dev), &init_net)) |
e9dc8653 EB |
591 | return NOTIFY_DONE; |
592 | ||
f3a0592b SH |
593 | if (event == NETDEV_UNREGISTER) { |
594 | neigh_ifdown(&clip_tbl, dev); | |
595 | return NOTIFY_DONE; | |
596 | } | |
597 | ||
1da177e4 | 598 | /* ignore non-CLIP devices */ |
dde09758 | 599 | if (dev->type != ARPHRD_ATM || dev->netdev_ops != &clip_netdev_ops) |
1da177e4 | 600 | return NOTIFY_DONE; |
f3a0592b | 601 | |
1da177e4 | 602 | switch (event) { |
e49e76db | 603 | case NETDEV_UP: |
99824461 | 604 | pr_debug("NETDEV_UP\n"); |
5ff765f3 | 605 | to_atmarpd(act_up, PRIV(dev)->number, 0); |
e49e76db SH |
606 | break; |
607 | case NETDEV_GOING_DOWN: | |
99824461 | 608 | pr_debug("NETDEV_DOWN\n"); |
5ff765f3 | 609 | to_atmarpd(act_down, PRIV(dev)->number, 0); |
e49e76db SH |
610 | break; |
611 | case NETDEV_CHANGE: | |
612 | case NETDEV_CHANGEMTU: | |
99824461 | 613 | pr_debug("NETDEV_CHANGE*\n"); |
5ff765f3 | 614 | to_atmarpd(act_change, PRIV(dev)->number, 0); |
e49e76db | 615 | break; |
1da177e4 LT |
616 | } |
617 | return NOTIFY_DONE; | |
618 | } | |
619 | ||
e49e76db SH |
620 | static int clip_inet_event(struct notifier_block *this, unsigned long event, |
621 | void *ifa) | |
1da177e4 LT |
622 | { |
623 | struct in_device *in_dev; | |
624 | ||
e49e76db | 625 | in_dev = ((struct in_ifaddr *)ifa)->ifa_dev; |
1da177e4 LT |
626 | /* |
627 | * Transitions are of the down-change-up type, so it's sufficient to | |
628 | * handle the change on up. | |
629 | */ | |
e49e76db SH |
630 | if (event != NETDEV_UP) |
631 | return NOTIFY_DONE; | |
632 | return clip_device_event(this, NETDEV_CHANGE, in_dev->dev); | |
1da177e4 LT |
633 | } |
634 | ||
1da177e4 | 635 | static struct notifier_block clip_dev_notifier = { |
5ff765f3 | 636 | .notifier_call = clip_device_event, |
1da177e4 LT |
637 | }; |
638 | ||
639 | ||
640 | ||
641 | static struct notifier_block clip_inet_notifier = { | |
5ff765f3 | 642 | .notifier_call = clip_inet_event, |
1da177e4 LT |
643 | }; |
644 | ||
645 | ||
646 | ||
647 | static void atmarpd_close(struct atm_vcc *vcc) | |
648 | { | |
99824461 | 649 | pr_debug("\n"); |
f3a0592b SH |
650 | |
651 | rtnl_lock(); | |
652 | atmarpd = NULL; | |
1da177e4 | 653 | skb_queue_purge(&sk_atm(vcc)->sk_receive_queue); |
f3a0592b SH |
654 | rtnl_unlock(); |
655 | ||
52240062 | 656 | pr_debug("(done)\n"); |
1da177e4 LT |
657 | module_put(THIS_MODULE); |
658 | } | |
659 | ||
1da177e4 LT |
660 | static struct atmdev_ops atmarpd_dev_ops = { |
661 | .close = atmarpd_close | |
662 | }; | |
663 | ||
664 | ||
665 | static struct atm_dev atmarpd_dev = { | |
666 | .ops = &atmarpd_dev_ops, | |
667 | .type = "arpd", | |
668 | .number = 999, | |
4ef8d0ae | 669 | .lock = __SPIN_LOCK_UNLOCKED(atmarpd_dev.lock) |
1da177e4 LT |
670 | }; |
671 | ||
672 | ||
673 | static int atm_init_atmarp(struct atm_vcc *vcc) | |
674 | { | |
f3a0592b SH |
675 | rtnl_lock(); |
676 | if (atmarpd) { | |
677 | rtnl_unlock(); | |
678 | return -EADDRINUSE; | |
679 | } | |
680 | ||
e956ea1b | 681 | mod_timer(&idle_timer, jiffies + CLIP_CHECK_INTERVAL * HZ); |
2d907392 | 682 | |
1da177e4 | 683 | atmarpd = vcc; |
e956ea1b JP |
684 | set_bit(ATM_VF_META, &vcc->flags); |
685 | set_bit(ATM_VF_READY, &vcc->flags); | |
1da177e4 LT |
686 | /* allow replies and avoid getting closed if signaling dies */ |
687 | vcc->dev = &atmarpd_dev; | |
688 | vcc_insert_socket(sk_atm(vcc)); | |
689 | vcc->push = NULL; | |
690 | vcc->pop = NULL; /* crash */ | |
691 | vcc->push_oam = NULL; /* crash */ | |
f3a0592b | 692 | rtnl_unlock(); |
1da177e4 LT |
693 | return 0; |
694 | } | |
695 | ||
696 | static int clip_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
697 | { | |
698 | struct atm_vcc *vcc = ATM_SD(sock); | |
699 | int err = 0; | |
700 | ||
701 | switch (cmd) { | |
e49e76db SH |
702 | case SIOCMKCLIP: |
703 | case ATMARPD_CTRL: | |
704 | case ATMARP_MKIP: | |
705 | case ATMARP_SETENTRY: | |
706 | case ATMARP_ENCAP: | |
707 | if (!capable(CAP_NET_ADMIN)) | |
708 | return -EPERM; | |
709 | break; | |
710 | default: | |
711 | return -ENOIOCTLCMD; | |
1da177e4 LT |
712 | } |
713 | ||
714 | switch (cmd) { | |
e49e76db SH |
715 | case SIOCMKCLIP: |
716 | err = clip_create(arg); | |
717 | break; | |
718 | case ATMARPD_CTRL: | |
719 | err = atm_init_atmarp(vcc); | |
720 | if (!err) { | |
721 | sock->state = SS_CONNECTED; | |
722 | __module_get(THIS_MODULE); | |
723 | } | |
724 | break; | |
725 | case ATMARP_MKIP: | |
726 | err = clip_mkip(vcc, arg); | |
727 | break; | |
728 | case ATMARP_SETENTRY: | |
30d492da | 729 | err = clip_setentry(vcc, (__force __be32)arg); |
e49e76db SH |
730 | break; |
731 | case ATMARP_ENCAP: | |
732 | err = clip_encap(vcc, arg); | |
733 | break; | |
1da177e4 LT |
734 | } |
735 | return err; | |
736 | } | |
737 | ||
738 | static struct atm_ioctl clip_ioctl_ops = { | |
e49e76db SH |
739 | .owner = THIS_MODULE, |
740 | .ioctl = clip_ioctl, | |
1da177e4 LT |
741 | }; |
742 | ||
743 | #ifdef CONFIG_PROC_FS | |
744 | ||
745 | static void svc_addr(struct seq_file *seq, struct sockaddr_atmsvc *addr) | |
746 | { | |
e49e76db SH |
747 | static int code[] = { 1, 2, 10, 6, 1, 0 }; |
748 | static int e164[] = { 1, 8, 4, 6, 1, 0 }; | |
1da177e4 LT |
749 | |
750 | if (*addr->sas_addr.pub) { | |
751 | seq_printf(seq, "%s", addr->sas_addr.pub); | |
752 | if (*addr->sas_addr.prv) | |
753 | seq_putc(seq, '+'); | |
754 | } else if (!*addr->sas_addr.prv) { | |
755 | seq_printf(seq, "%s", "(none)"); | |
756 | return; | |
757 | } | |
758 | if (*addr->sas_addr.prv) { | |
759 | unsigned char *prv = addr->sas_addr.prv; | |
760 | int *fields; | |
761 | int i, j; | |
762 | ||
763 | fields = *prv == ATM_AFI_E164 ? e164 : code; | |
764 | for (i = 0; fields[i]; i++) { | |
765 | for (j = fields[i]; j; j--) | |
766 | seq_printf(seq, "%02X", *prv++); | |
e49e76db | 767 | if (fields[i + 1]) |
1da177e4 LT |
768 | seq_putc(seq, '.'); |
769 | } | |
770 | } | |
771 | } | |
772 | ||
773 | /* This means the neighbour entry has no attached VCC objects. */ | |
774 | #define SEQ_NO_VCC_TOKEN ((void *) 2) | |
775 | ||
869759b9 | 776 | static void atmarp_info(struct seq_file *seq, struct neighbour *n, |
1da177e4 LT |
777 | struct atmarp_entry *entry, struct clip_vcc *clip_vcc) |
778 | { | |
869759b9 | 779 | struct net_device *dev = n->dev; |
1da177e4 LT |
780 | unsigned long exp; |
781 | char buf[17]; | |
782 | int svc, llc, off; | |
783 | ||
784 | svc = ((clip_vcc == SEQ_NO_VCC_TOKEN) || | |
785 | (sk_atm(clip_vcc->vcc)->sk_family == AF_ATMSVC)); | |
786 | ||
e49e76db | 787 | llc = ((clip_vcc == SEQ_NO_VCC_TOKEN) || clip_vcc->encap); |
1da177e4 LT |
788 | |
789 | if (clip_vcc == SEQ_NO_VCC_TOKEN) | |
790 | exp = entry->neigh->used; | |
791 | else | |
792 | exp = clip_vcc->last_use; | |
793 | ||
794 | exp = (jiffies - exp) / HZ; | |
795 | ||
796 | seq_printf(seq, "%-6s%-4s%-4s%5ld ", | |
e49e76db | 797 | dev->name, svc ? "SVC" : "PVC", llc ? "LLC" : "NULL", exp); |
1da177e4 | 798 | |
869759b9 | 799 | off = scnprintf(buf, sizeof(buf) - 1, "%pI4", n->primary_key); |
1da177e4 LT |
800 | while (off < 16) |
801 | buf[off++] = ' '; | |
802 | buf[off] = '\0'; | |
803 | seq_printf(seq, "%s", buf); | |
804 | ||
805 | if (clip_vcc == SEQ_NO_VCC_TOKEN) { | |
806 | if (time_before(jiffies, entry->expires)) | |
807 | seq_printf(seq, "(resolving)\n"); | |
808 | else | |
809 | seq_printf(seq, "(expired, ref %d)\n", | |
810 | atomic_read(&entry->neigh->refcnt)); | |
811 | } else if (!svc) { | |
812 | seq_printf(seq, "%d.%d.%d\n", | |
813 | clip_vcc->vcc->dev->number, | |
e49e76db | 814 | clip_vcc->vcc->vpi, clip_vcc->vcc->vci); |
1da177e4 LT |
815 | } else { |
816 | svc_addr(seq, &clip_vcc->vcc->remote); | |
817 | seq_putc(seq, '\n'); | |
818 | } | |
819 | } | |
820 | ||
821 | struct clip_seq_state { | |
822 | /* This member must be first. */ | |
823 | struct neigh_seq_state ns; | |
824 | ||
825 | /* Local to clip specific iteration. */ | |
826 | struct clip_vcc *vcc; | |
827 | }; | |
828 | ||
829 | static struct clip_vcc *clip_seq_next_vcc(struct atmarp_entry *e, | |
830 | struct clip_vcc *curr) | |
831 | { | |
832 | if (!curr) { | |
833 | curr = e->vccs; | |
834 | if (!curr) | |
835 | return SEQ_NO_VCC_TOKEN; | |
836 | return curr; | |
837 | } | |
838 | if (curr == SEQ_NO_VCC_TOKEN) | |
839 | return NULL; | |
840 | ||
841 | curr = curr->next; | |
842 | ||
843 | return curr; | |
844 | } | |
845 | ||
846 | static void *clip_seq_vcc_walk(struct clip_seq_state *state, | |
e49e76db | 847 | struct atmarp_entry *e, loff_t * pos) |
1da177e4 LT |
848 | { |
849 | struct clip_vcc *vcc = state->vcc; | |
850 | ||
851 | vcc = clip_seq_next_vcc(e, vcc); | |
852 | if (vcc && pos != NULL) { | |
853 | while (*pos) { | |
854 | vcc = clip_seq_next_vcc(e, vcc); | |
855 | if (!vcc) | |
856 | break; | |
857 | --(*pos); | |
858 | } | |
859 | } | |
860 | state->vcc = vcc; | |
861 | ||
862 | return vcc; | |
863 | } | |
e49e76db | 864 | |
1da177e4 | 865 | static void *clip_seq_sub_iter(struct neigh_seq_state *_state, |
e49e76db | 866 | struct neighbour *n, loff_t * pos) |
1da177e4 | 867 | { |
e49e76db | 868 | struct clip_seq_state *state = (struct clip_seq_state *)_state; |
1da177e4 | 869 | |
869759b9 | 870 | return clip_seq_vcc_walk(state, neighbour_priv(n), pos); |
1da177e4 LT |
871 | } |
872 | ||
e49e76db | 873 | static void *clip_seq_start(struct seq_file *seq, loff_t * pos) |
1da177e4 | 874 | { |
ae22120a DL |
875 | struct clip_seq_state *state = seq->private; |
876 | state->ns.neigh_sub_iter = clip_seq_sub_iter; | |
1da177e4 LT |
877 | return neigh_seq_start(seq, pos, &clip_tbl, NEIGH_SEQ_NEIGH_ONLY); |
878 | } | |
879 | ||
880 | static int clip_seq_show(struct seq_file *seq, void *v) | |
881 | { | |
e49e76db SH |
882 | static char atm_arp_banner[] = |
883 | "IPitf TypeEncp Idle IP address ATM address\n"; | |
1da177e4 LT |
884 | |
885 | if (v == SEQ_START_TOKEN) { | |
886 | seq_puts(seq, atm_arp_banner); | |
887 | } else { | |
888 | struct clip_seq_state *state = seq->private; | |
1da177e4 | 889 | struct clip_vcc *vcc = state->vcc; |
869759b9 | 890 | struct neighbour *n = v; |
1da177e4 | 891 | |
869759b9 | 892 | atmarp_info(seq, n, neighbour_priv(n), vcc); |
1da177e4 | 893 | } |
e49e76db | 894 | return 0; |
1da177e4 LT |
895 | } |
896 | ||
56b3d975 | 897 | static const struct seq_operations arp_seq_ops = { |
1da177e4 LT |
898 | .start = clip_seq_start, |
899 | .next = neigh_seq_next, | |
900 | .stop = neigh_seq_stop, | |
901 | .show = clip_seq_show, | |
902 | }; | |
903 | ||
904 | static int arp_seq_open(struct inode *inode, struct file *file) | |
905 | { | |
ae22120a DL |
906 | return seq_open_net(inode, file, &arp_seq_ops, |
907 | sizeof(struct clip_seq_state)); | |
426b5303 EB |
908 | } |
909 | ||
9a32144e | 910 | static const struct file_operations arp_seq_fops = { |
1da177e4 LT |
911 | .open = arp_seq_open, |
912 | .read = seq_read, | |
913 | .llseek = seq_lseek, | |
ae22120a | 914 | .release = seq_release_net, |
1da177e4 LT |
915 | .owner = THIS_MODULE |
916 | }; | |
917 | #endif | |
918 | ||
dbee0d3f WC |
919 | static void atm_clip_exit_noproc(void); |
920 | ||
1da177e4 LT |
921 | static int __init atm_clip_init(void) |
922 | { | |
bd89efc5 | 923 | neigh_table_init_no_netlink(&clip_tbl); |
1da177e4 LT |
924 | |
925 | clip_tbl_hook = &clip_tbl; | |
926 | register_atm_ioctl(&clip_ioctl_ops); | |
f3a0592b SH |
927 | register_netdevice_notifier(&clip_dev_notifier); |
928 | register_inetaddr_notifier(&clip_inet_notifier); | |
1da177e4 | 929 | |
2d907392 SH |
930 | setup_timer(&idle_timer, idle_timer_check, 0); |
931 | ||
24781734 AB |
932 | #ifdef CONFIG_PROC_FS |
933 | { | |
934 | struct proc_dir_entry *p; | |
935 | ||
16e297b3 | 936 | p = proc_create("arp", S_IRUGO, atm_proc_root, &arp_seq_fops); |
dbee0d3f | 937 | if (!p) { |
99824461 | 938 | pr_err("Unable to initialize /proc/net/atm/arp\n"); |
dbee0d3f WC |
939 | atm_clip_exit_noproc(); |
940 | return -ENOMEM; | |
941 | } | |
24781734 AB |
942 | } |
943 | #endif | |
1da177e4 LT |
944 | |
945 | return 0; | |
946 | } | |
947 | ||
dbee0d3f | 948 | static void atm_clip_exit_noproc(void) |
1da177e4 LT |
949 | { |
950 | struct net_device *dev, *next; | |
951 | ||
f3a0592b SH |
952 | unregister_inetaddr_notifier(&clip_inet_notifier); |
953 | unregister_netdevice_notifier(&clip_dev_notifier); | |
954 | ||
1da177e4 LT |
955 | deregister_atm_ioctl(&clip_ioctl_ops); |
956 | ||
957 | /* First, stop the idle timer, so it stops banging | |
958 | * on the table. | |
959 | */ | |
2d907392 | 960 | del_timer_sync(&idle_timer); |
1da177e4 LT |
961 | |
962 | /* Next, purge the table, so that the device | |
963 | * unregister loop below does not hang due to | |
964 | * device references remaining in the table. | |
965 | */ | |
966 | neigh_ifdown(&clip_tbl, NULL); | |
967 | ||
968 | dev = clip_devs; | |
969 | while (dev) { | |
970 | next = PRIV(dev)->next; | |
971 | unregister_netdev(dev); | |
972 | free_netdev(dev); | |
973 | dev = next; | |
974 | } | |
975 | ||
976 | /* Now it is safe to fully shutdown whole table. */ | |
977 | neigh_table_clear(&clip_tbl); | |
978 | ||
979 | clip_tbl_hook = NULL; | |
980 | } | |
981 | ||
dbee0d3f WC |
982 | static void __exit atm_clip_exit(void) |
983 | { | |
984 | remove_proc_entry("arp", atm_proc_root); | |
985 | ||
986 | atm_clip_exit_noproc(); | |
987 | } | |
988 | ||
1da177e4 LT |
989 | module_init(atm_clip_init); |
990 | module_exit(atm_clip_exit); | |
4909e488 SH |
991 | MODULE_AUTHOR("Werner Almesberger"); |
992 | MODULE_DESCRIPTION("Classical/IP over ATM interface"); | |
1da177e4 | 993 | MODULE_LICENSE("GPL"); |