clip.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:19k
- /* net/atm/clip.c - RFC1577 Classical IP over ATM */
- /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
- #include <linux/config.h>
- #include <linux/string.h>
- #include <linux/errno.h>
- #include <linux/kernel.h> /* for UINT_MAX */
- #include <linux/netdevice.h>
- #include <linux/skbuff.h>
- #include <linux/wait.h>
- #include <linux/timer.h>
- #include <linux/if_arp.h> /* for some manifest constants */
- #include <linux/notifier.h>
- #include <linux/atm.h>
- #include <linux/atmdev.h>
- #include <linux/atmclip.h>
- #include <linux/atmarp.h>
- #include <linux/ip.h> /* for net/route.h */
- #include <linux/in.h> /* for struct sockaddr_in */
- #include <linux/if.h> /* for IFF_UP */
- #include <linux/inetdevice.h>
- #include <linux/bitops.h>
- #include <net/route.h> /* for struct rtable and routing */
- #include <net/icmp.h> /* icmp_send */
- #include <asm/param.h> /* for HZ */
- #include <asm/byteorder.h> /* for htons etc. */
- #include <asm/system.h> /* save/restore_flags */
- #include <asm/uaccess.h>
- #include <asm/atomic.h>
- #include "common.h"
- #include "resources.h"
- #include "ipcommon.h"
- #include <net/atmclip.h>
- #if 0
- #define DPRINTK(format,args...) printk(format,##args)
- #else
- #define DPRINTK(format,args...)
- #endif
- struct net_device *clip_devs = NULL;
- struct atm_vcc *atmarpd = NULL;
- static struct timer_list idle_timer;
- static int start_timer = 1;
- static int to_atmarpd(enum atmarp_ctrl_type type,int itf,unsigned long ip)
- {
- struct atmarp_ctrl *ctrl;
- struct sk_buff *skb;
- DPRINTK("to_atmarpd(%d)n",type);
- if (!atmarpd) return -EUNATCH;
- skb = alloc_skb(sizeof(struct atmarp_ctrl),GFP_ATOMIC);
- if (!skb) return -ENOMEM;
- ctrl = (struct atmarp_ctrl *) skb_put(skb,sizeof(struct atmarp_ctrl));
- ctrl->type = type;
- ctrl->itf_num = itf;
- ctrl->ip = ip;
- atm_force_charge(atmarpd,skb->truesize);
- skb_queue_tail(&atmarpd->recvq,skb);
- wake_up(&atmarpd->sleep);
- return 0;
- }
- static void link_vcc(struct clip_vcc *clip_vcc,struct atmarp_entry *entry)
- {
- DPRINTK("link_vcc %p to entry %p (neigh %p)n",clip_vcc,entry,
- entry->neigh);
- clip_vcc->entry = entry;
- clip_vcc->xoff = 0; /* @@@ may overrun buffer by one packet */
- clip_vcc->next = entry->vccs;
- entry->vccs = clip_vcc;
- entry->neigh->used = jiffies;
- }
- static void unlink_clip_vcc(struct clip_vcc *clip_vcc)
- {
- struct atmarp_entry *entry = clip_vcc->entry;
- struct clip_vcc **walk;
- if (!entry) {
- printk(KERN_CRIT "!clip_vcc->entry (clip_vcc %p)n",clip_vcc);
- return;
- }
- entry->neigh->used = jiffies;
- for (walk = &entry->vccs; *walk; walk = &(*walk)->next)
- if (*walk == clip_vcc) {
- int error;
- *walk = clip_vcc->next; /* atomic */
- clip_vcc->entry = NULL;
- if (clip_vcc->xoff)
- netif_wake_queue(entry->neigh->dev);
- if (entry->vccs) return;
- entry->expires = jiffies-1;
- /* force resolution or expiration */
- error = neigh_update(entry->neigh,NULL,NUD_NONE,0,0);
- if (error)
- printk(KERN_CRIT "unlink_clip_vcc: "
- "neigh_update failed with %dn",error);
- return;
- }
- printk(KERN_CRIT "ATMARP: unlink_clip_vcc failed (entry %p, vcc "
- "0x%p)n",entry,clip_vcc);
- }
- static void idle_timer_check(unsigned long dummy)
- {
- int i;
- /*DPRINTK("idle_timer_checkn");*/
- write_lock(&clip_tbl.lock);
- for (i = 0; i <= NEIGH_HASHMASK; i++) {
- struct neighbour **np;
- for (np = &clip_tbl.hash_buckets[i]; *np;) {
- struct neighbour *n = *np;
- struct atmarp_entry *entry = NEIGH2ENTRY(n);
- struct clip_vcc *clip_vcc;
- for (clip_vcc = entry->vccs; clip_vcc;
- clip_vcc = clip_vcc->next)
- if (clip_vcc->idle_timeout &&
- time_after(jiffies, clip_vcc->last_use+
- clip_vcc->idle_timeout)) {
- DPRINTK("releasing vcc %p->%p of "
- "entry %pn",clip_vcc,clip_vcc->vcc,
- entry);
- atm_async_release_vcc(clip_vcc->vcc,
- -ETIMEDOUT);
- }
- if (entry->vccs ||
- time_before(jiffies, entry->expires)) {
- np = &n->next;
- continue;
- }
- if (atomic_read(&n->refcnt) > 1) {
- struct sk_buff *skb;
- DPRINTK("destruction postponed with ref %dn",
- atomic_read(&n->refcnt));
- while ((skb = skb_dequeue(&n->arp_queue)) !=
- NULL)
- dev_kfree_skb(skb);
- np = &n->next;
- continue;
- }
- *np = n->next;
- DPRINTK("expired neigh %pn",n);
- n->dead = 1;
- neigh_release(n);
- }
- }
- mod_timer(&idle_timer, jiffies+CLIP_CHECK_INTERVAL*HZ);
- write_unlock(&clip_tbl.lock);
- }
- static int clip_arp_rcv(struct sk_buff *skb)
- {
- struct atm_vcc *vcc;
- DPRINTK("clip_arp_rcvn");
- vcc = ATM_SKB(skb)->vcc;
- if (!vcc || !atm_charge(vcc,skb->truesize)) {
- dev_kfree_skb_any(skb);
- return 0;
- }
- DPRINTK("pushing to %pn",vcc);
- DPRINTK("using %pn",CLIP_VCC(vcc)->old_push);
- CLIP_VCC(vcc)->old_push(vcc,skb);
- return 0;
- }
- void clip_push(struct atm_vcc *vcc,struct sk_buff *skb)
- {
- struct clip_vcc *clip_vcc = CLIP_VCC(vcc);
- DPRINTK("clip pushn");
- if (!skb) {
- DPRINTK("removing VCC %pn",clip_vcc);
- if (clip_vcc->entry) unlink_clip_vcc(clip_vcc);
- clip_vcc->old_push(vcc,NULL); /* pass on the bad news */
- kfree(clip_vcc);
- return;
- }
- atm_return(vcc,skb->truesize);
- skb->dev = clip_vcc->entry ? clip_vcc->entry->neigh->dev : clip_devs;
- /* clip_vcc->entry == NULL if we don't have an IP address yet */
- if (!skb->dev) {
- dev_kfree_skb_any(skb);
- return;
- }
- ATM_SKB(skb)->vcc = vcc;
- skb->mac.raw = skb->data;
- if (!clip_vcc->encap || skb->len < RFC1483LLC_LEN || memcmp(skb->data,
- llc_oui,sizeof(llc_oui))) skb->protocol = htons(ETH_P_IP);
- else {
- skb->protocol = ((u16 *) skb->data)[3];
- skb_pull(skb,RFC1483LLC_LEN);
- if (skb->protocol == htons(ETH_P_ARP)) {
- PRIV(skb->dev)->stats.rx_packets++;
- PRIV(skb->dev)->stats.rx_bytes += skb->len;
- clip_arp_rcv(skb);
- return;
- }
- }
- clip_vcc->last_use = jiffies;
- PRIV(skb->dev)->stats.rx_packets++;
- PRIV(skb->dev)->stats.rx_bytes += skb->len;
- netif_rx(skb);
- }
- /*
- * Note: these spinlocks _must_not_ block on non-SMP. The only goal is that
- * clip_pop is atomic with respect to the critical section in clip_start_xmit.
- */
- static void clip_pop(struct atm_vcc *vcc,struct sk_buff *skb)
- {
- struct clip_vcc *clip_vcc = CLIP_VCC(vcc);
- struct net_device *dev = skb->dev;
- int old;
- unsigned long flags;
- DPRINTK("clip_pop(vcc %p)n",vcc);
- clip_vcc->old_pop(vcc,skb);
- /* skb->dev == NULL in outbound ARP packets */
- if (!dev) return;
- spin_lock_irqsave(&PRIV(dev)->xoff_lock,flags);
- if (atm_may_send(vcc,0)) {
- old = xchg(&clip_vcc->xoff,0);
- if (old) netif_wake_queue(dev);
- }
- spin_unlock_irqrestore(&PRIV(dev)->xoff_lock,flags);
- }
- static void clip_neigh_destroy(struct neighbour *neigh)
- {
- DPRINTK("clip_neigh_destroy (neigh %p)n",neigh);
- if (NEIGH2ENTRY(neigh)->vccs)
- printk(KERN_CRIT "clip_neigh_destroy: vccs != NULL !!!n");
- NEIGH2ENTRY(neigh)->vccs = (void *) 0xdeadbeef;
- }
- static void clip_neigh_solicit(struct neighbour *neigh,struct sk_buff *skb)
- {
- DPRINTK("clip_neigh_solicit (neigh %p, skb %p)n",neigh,skb);
- to_atmarpd(act_need,PRIV(neigh->dev)->number,NEIGH2ENTRY(neigh)->ip);
- }
- static void clip_neigh_error(struct neighbour *neigh,struct sk_buff *skb)
- {
- #ifndef CONFIG_ATM_CLIP_NO_ICMP
- icmp_send(skb,ICMP_DEST_UNREACH,ICMP_HOST_UNREACH,0);
- #endif
- kfree_skb(skb);
- }
- static struct neigh_ops clip_neigh_ops = {
- family: AF_INET,
- destructor: clip_neigh_destroy,
- solicit: clip_neigh_solicit,
- error_report: clip_neigh_error,
- output: dev_queue_xmit,
- connected_output: dev_queue_xmit,
- hh_output: dev_queue_xmit,
- queue_xmit: dev_queue_xmit,
- };
- static int clip_constructor(struct neighbour *neigh)
- {
- struct atmarp_entry *entry = NEIGH2ENTRY(neigh);
- struct net_device *dev = neigh->dev;
- struct in_device *in_dev = dev->ip_ptr;
- DPRINTK("clip_constructor (neigh %p, entry %p)n",neigh,entry);
- if (!in_dev) return -EINVAL;
- neigh->type = inet_addr_type(entry->ip);
- if (neigh->type != RTN_UNICAST) return -EINVAL;
- if (in_dev->arp_parms) neigh->parms = in_dev->arp_parms;
- neigh->ops = &clip_neigh_ops;
- neigh->output = neigh->nud_state & NUD_VALID ?
- neigh->ops->connected_output : neigh->ops->output;
- entry->neigh = neigh;
- entry->vccs = NULL;
- entry->expires = jiffies-1;
- return 0;
- }
- static u32 clip_hash(const void *pkey, const struct net_device *dev)
- {
- u32 hash_val;
- hash_val = *(u32*)pkey;
- hash_val ^= (hash_val>>16);
- hash_val ^= hash_val>>8;
- hash_val ^= hash_val>>3;
- hash_val = (hash_val^dev->ifindex)&NEIGH_HASHMASK;
- return hash_val;
- }
- struct neigh_table clip_tbl = {
- NULL, /* next */
- AF_INET, /* family */
- sizeof(struct neighbour)+sizeof(struct atmarp_entry), /* entry_size */
- 4, /* key_len */
- clip_hash,
- clip_constructor, /* constructor */
- NULL, /* pconstructor */
- NULL, /* pdestructor */
- NULL, /* proxy_redo */
- "clip_arp_cache",
- { /* neigh_parms */
- NULL, /* next */
- NULL, /* neigh_setup */
- &clip_tbl, /* tbl */
- 0, /* entries */
- NULL, /* priv */
- NULL, /* sysctl_table */
- 30*HZ, /* base_reachable_time */
- 1*HZ, /* retrans_time */
- 60*HZ, /* gc_staletime */
- 30*HZ, /* reachable_time */
- 5*HZ, /* delay_probe_time */
- 3, /* queue_len */
- 3, /* ucast_probes */
- 0, /* app_probes */
- 3, /* mcast_probes */
- 1*HZ, /* anycast_delay */
- (8*HZ)/10, /* proxy_delay */
- 1*HZ, /* proxy_qlen */
- 64 /* locktime */
- },
- 30*HZ,128,512,1024 /* copied from ARP ... */
- };
- /* @@@ copy bh locking from arp.c -- need to bh-enable atm code before */
- /*
- * We play with the resolve flag: 0 and 1 have the usual meaning, but -1 means
- * to allocate the neighbour entry but not to ask atmarpd for resolution. Also,
- * don't increment the usage count. This is used to create entries in
- * clip_setentry.
- */
- int clip_encap(struct atm_vcc *vcc,int mode)
- {
- CLIP_VCC(vcc)->encap = mode;
- return 0;
- }
- static int clip_start_xmit(struct sk_buff *skb,struct net_device *dev)
- {
- struct clip_priv *clip_priv = PRIV(dev);
- struct atmarp_entry *entry;
- struct atm_vcc *vcc;
- int old;
- unsigned long flags;
- DPRINTK("clip_start_xmit (skb %p)n",skb);
- if (!skb->dst) {
- printk(KERN_ERR "clip_start_xmit: skb->dst == NULLn");
- dev_kfree_skb(skb);
- clip_priv->stats.tx_dropped++;
- return 0;
- }
- if (!skb->dst->neighbour) {
- #if 0
- skb->dst->neighbour = clip_find_neighbour(skb->dst,1);
- if (!skb->dst->neighbour) {
- dev_kfree_skb(skb); /* lost that one */
- clip_priv->stats.tx_dropped++;
- return 0;
- }
- #endif
- printk(KERN_ERR "clip_start_xmit: NO NEIGHBOUR !n");
- dev_kfree_skb(skb);
- clip_priv->stats.tx_dropped++;
- return 0;
- }
- entry = NEIGH2ENTRY(skb->dst->neighbour);
- if (!entry->vccs) {
- if (time_after(jiffies, entry->expires)) {
- /* should be resolved */
- entry->expires = jiffies+ATMARP_RETRY_DELAY*HZ;
- to_atmarpd(act_need,PRIV(dev)->number,entry->ip);
- }
- if (entry->neigh->arp_queue.qlen < ATMARP_MAX_UNRES_PACKETS)
- skb_queue_tail(&entry->neigh->arp_queue,skb);
- else {
- dev_kfree_skb(skb);
- clip_priv->stats.tx_dropped++;
- }
- return 0;
- }
- DPRINTK("neigh %p, vccs %pn",entry,entry->vccs);
- ATM_SKB(skb)->vcc = vcc = entry->vccs->vcc;
- DPRINTK("using neighbour %p, vcc %pn",skb->dst->neighbour,vcc);
- if (entry->vccs->encap) {
- void *here;
- here = skb_push(skb,RFC1483LLC_LEN);
- memcpy(here,llc_oui,sizeof(llc_oui));
- ((u16 *) here)[3] = skb->protocol;
- }
- atomic_add(skb->truesize,&vcc->tx_inuse);
- ATM_SKB(skb)->iovcnt = 0;
- ATM_SKB(skb)->atm_options = vcc->atm_options;
- entry->vccs->last_use = jiffies;
- DPRINTK("atm_skb(%p)->vcc(%p)->dev(%p)n",skb,vcc,vcc->dev);
- old = xchg(&entry->vccs->xoff,1); /* assume XOFF ... */
- if (old) {
- printk(KERN_WARNING "clip_start_xmit: XOFF->XOFF transitionn");
- return 0;
- }
- clip_priv->stats.tx_packets++;
- clip_priv->stats.tx_bytes += skb->len;
- (void) vcc->send(vcc,skb);
- if (atm_may_send(vcc,0)) {
- entry->vccs->xoff = 0;
- return 0;
- }
- spin_lock_irqsave(&clip_priv->xoff_lock,flags);
- netif_stop_queue(dev); /* XOFF -> throttle immediately */
- barrier();
- if (!entry->vccs->xoff)
- netif_start_queue(dev);
- /* Oh, we just raced with clip_pop. netif_start_queue should be
- good enough, because nothing should really be asleep because
- of the brief netif_stop_queue. If this isn't true or if it
- changes, use netif_wake_queue instead. */
- spin_unlock_irqrestore(&clip_priv->xoff_lock,flags);
- return 0;
- }
- static struct net_device_stats *clip_get_stats(struct net_device *dev)
- {
- return &PRIV(dev)->stats;
- }
- int clip_mkip(struct atm_vcc *vcc,int timeout)
- {
- struct clip_vcc *clip_vcc;
- struct sk_buff_head copy;
- struct sk_buff *skb;
- if (!vcc->push) return -EBADFD;
- clip_vcc = kmalloc(sizeof(struct clip_vcc),GFP_KERNEL);
- if (!clip_vcc) return -ENOMEM;
- DPRINTK("mkip clip_vcc %p vcc %pn",clip_vcc,vcc);
- clip_vcc->vcc = vcc;
- vcc->user_back = clip_vcc;
- clip_vcc->entry = NULL;
- clip_vcc->xoff = 0;
- clip_vcc->encap = 1;
- clip_vcc->last_use = jiffies;
- clip_vcc->idle_timeout = timeout*HZ;
- clip_vcc->old_push = vcc->push;
- clip_vcc->old_pop = vcc->pop;
- vcc->push = clip_push;
- vcc->pop = clip_pop;
- skb_queue_head_init(©);
- skb_migrate(&vcc->recvq,©);
- /* re-process everything received between connection setup and MKIP */
- while ((skb = skb_dequeue(©)))
- if (!clip_devs) {
- atm_return(vcc,skb->truesize);
- kfree_skb(skb);
- }
- else {
- unsigned int len = skb->len;
- clip_push(vcc,skb);
- PRIV(skb->dev)->stats.rx_packets--;
- PRIV(skb->dev)->stats.rx_bytes -= len;
- }
- return 0;
- }
- int clip_setentry(struct atm_vcc *vcc,u32 ip)
- {
- struct neighbour *neigh;
- struct atmarp_entry *entry;
- int error;
- struct clip_vcc *clip_vcc;
- struct rtable *rt;
- if (vcc->push != clip_push) {
- printk(KERN_WARNING "clip_setentry: non-CLIP VCCn");
- return -EBADF;
- }
- clip_vcc = CLIP_VCC(vcc);
- if (!ip) {
- if (!clip_vcc->entry) {
- printk(KERN_ERR "hiding hidden ATMARP entryn");
- return 0;
- }
- DPRINTK("setentry: removen");
- unlink_clip_vcc(clip_vcc);
- return 0;
- }
- error = ip_route_output(&rt,ip,0,1,0);
- if (error) return error;
- neigh = __neigh_lookup(&clip_tbl,&ip,rt->u.dst.dev,1);
- ip_rt_put(rt);
- if (!neigh)
- return -ENOMEM;
- entry = NEIGH2ENTRY(neigh);
- if (entry != clip_vcc->entry) {
- if (!clip_vcc->entry) DPRINTK("setentry: addn");
- else {
- DPRINTK("setentry: updaten");
- unlink_clip_vcc(clip_vcc);
- }
- link_vcc(clip_vcc,entry);
- }
- error = neigh_update(neigh,llc_oui,NUD_PERMANENT,1,0);
- neigh_release(neigh);
- return error;
- }
- static int clip_init(struct net_device *dev)
- {
- DPRINTK("clip_init %sn",dev->name);
- dev->hard_start_xmit = clip_start_xmit;
- /* sg_xmit ... */
- dev->hard_header = NULL;
- dev->rebuild_header = NULL;
- dev->set_mac_address = NULL;
- dev->hard_header_parse = NULL;
- dev->hard_header_cache = NULL;
- dev->header_cache_update = NULL;
- dev->change_mtu = NULL;
- dev->do_ioctl = NULL;
- dev->get_stats = clip_get_stats;
- dev->type = ARPHRD_ATM;
- dev->hard_header_len = RFC1483LLC_LEN;
- dev->mtu = RFC1626_MTU;
- dev->addr_len = 0;
- dev->tx_queue_len = 100; /* "normal" queue (packets) */
- /* When using a "real" qdisc, the qdisc determines the queue */
- /* length. tx_queue_len is only used for the default case, */
- /* without any more elaborate queuing. 100 is a reasonable */
- /* compromise between decent burst-tolerance and protection */
- /* against memory hogs. */
- dev->flags = 0;
- return 0;
- }
- int clip_create(int number)
- {
- struct net_device *dev;
- struct clip_priv *clip_priv;
- int error;
- if (number != -1) {
- for (dev = clip_devs; dev; dev = PRIV(dev)->next)
- if (PRIV(dev)->number == number) return -EEXIST;
- }
- else {
- number = 0;
- for (dev = clip_devs; dev; dev = PRIV(dev)->next)
- if (PRIV(dev)->number >= number)
- number = PRIV(dev)->number+1;
- }
- dev = kmalloc(sizeof(struct net_device)+sizeof(struct clip_priv),
- GFP_KERNEL);
- if (!dev) return -ENOMEM;
- memset(dev,0,sizeof(struct net_device)+sizeof(struct clip_priv));
- clip_priv = PRIV(dev);
- sprintf(dev->name,"atm%d",number);
- dev->init = clip_init;
- spin_lock_init(&clip_priv->xoff_lock);
- clip_priv->number = number;
- error = register_netdev(dev);
- if (error) {
- kfree(dev);
- return error;
- }
- clip_priv->next = clip_devs;
- clip_devs = dev;
- DPRINTK("registered (net:%s)n",dev->name);
- return number;
- }
- static int clip_device_event(struct notifier_block *this,unsigned long event,
- void *dev)
- {
- /* ignore non-CLIP devices */
- if (((struct net_device *) dev)->type != ARPHRD_ATM ||
- ((struct net_device *) dev)->init != clip_init)
- return NOTIFY_DONE;
- switch (event) {
- case NETDEV_UP:
- DPRINTK("clip_device_event NETDEV_UPn");
- (void) to_atmarpd(act_up,PRIV(dev)->number,0);
- break;
- case NETDEV_GOING_DOWN:
- DPRINTK("clip_device_event NETDEV_DOWNn");
- (void) to_atmarpd(act_down,PRIV(dev)->number,0);
- break;
- case NETDEV_CHANGE:
- case NETDEV_CHANGEMTU:
- DPRINTK("clip_device_event NETDEV_CHANGE*n");
- (void) to_atmarpd(act_change,PRIV(dev)->number,0);
- break;
- case NETDEV_REBOOT:
- case NETDEV_REGISTER:
- case NETDEV_DOWN:
- DPRINTK("clip_device_event %ldn",event);
- /* ignore */
- break;
- default:
- printk(KERN_WARNING "clip_device_event: unknown event "
- "%ldn",event);
- break;
- }
- return NOTIFY_DONE;
- }
- static int clip_inet_event(struct notifier_block *this,unsigned long event,
- void *ifa)
- {
- struct in_device *in_dev;
- in_dev = ((struct in_ifaddr *) ifa)->ifa_dev;
- if (!in_dev || !in_dev->dev) {
- printk(KERN_WARNING "clip_inet_event: no devicen");
- return NOTIFY_DONE;
- }
- /*
- * Transitions are of the down-change-up type, so it's sufficient to
- * handle the change on up.
- */
- if (event != NETDEV_UP) return NOTIFY_DONE;
- return clip_device_event(this,NETDEV_CHANGE,in_dev->dev);
- }
- static struct notifier_block clip_dev_notifier = {
- clip_device_event,
- NULL,
- 0
- };
- static struct notifier_block clip_inet_notifier = {
- clip_inet_event,
- NULL,
- 0
- };
- static void atmarpd_close(struct atm_vcc *vcc)
- {
- DPRINTK("atmarpd_closen");
- atmarpd = NULL; /* assumed to be atomic */
- barrier();
- unregister_inetaddr_notifier(&clip_inet_notifier);
- unregister_netdevice_notifier(&clip_dev_notifier);
- if (skb_peek(&vcc->recvq))
- printk(KERN_ERR "atmarpd_close: closing with requests "
- "pendingn");
- skb_queue_purge(&vcc->recvq);
- DPRINTK("(done)n");
- }
- static struct atmdev_ops atmarpd_dev_ops = {
- close: atmarpd_close,
- };
- static struct atm_dev atmarpd_dev = {
- &atmarpd_dev_ops,
- NULL, /* no PHY */
- "arpd", /* type */
- 999, /* dummy device number */
- NULL,NULL, /* pretend not to have any VCCs */
- NULL,NULL, /* no data */
- { 0 }, /* no flags */
- NULL, /* no local address */
- { 0 } /* no ESI, no statistics */
- };
- int atm_init_atmarp(struct atm_vcc *vcc)
- {
- struct net_device *dev;
- if (atmarpd) return -EADDRINUSE;
- if (start_timer) {
- start_timer = 0;
- init_timer(&idle_timer);
- idle_timer.expires = jiffies+CLIP_CHECK_INTERVAL*HZ;
- idle_timer.function = idle_timer_check;
- add_timer(&idle_timer);
- }
- atmarpd = vcc;
- set_bit(ATM_VF_META,&vcc->flags);
- set_bit(ATM_VF_READY,&vcc->flags);
- /* allow replies and avoid getting closed if signaling dies */
- bind_vcc(vcc,&atmarpd_dev);
- vcc->push = NULL;
- vcc->pop = NULL; /* crash */
- vcc->push_oam = NULL; /* crash */
- if (register_netdevice_notifier(&clip_dev_notifier))
- printk(KERN_ERR "register_netdevice_notifier failedn");
- if (register_inetaddr_notifier(&clip_inet_notifier))
- printk(KERN_ERR "register_inetaddr_notifier failedn");
- for (dev = clip_devs; dev; dev = PRIV(dev)->next)
- if (dev->flags & IFF_UP)
- (void) to_atmarpd(act_up,PRIV(dev)->number,0);
- return 0;
- }
- void atm_clip_init(void)
- {
- clip_tbl.lock = RW_LOCK_UNLOCKED;
- clip_tbl.kmem_cachep = kmem_cache_create(clip_tbl.id,
- clip_tbl.entry_size, 0, SLAB_HWCACHE_ALIGN, NULL, NULL);
- }