/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
-
#include <linux/config.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/atmdev.h>
#include <linux/atmclip.h>
#include <linux/atmarp.h>
+#include <linux/capability.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/bitops.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
+#include <linux/rcupdate.h>
+#include <linux/jhash.h>
#include <net/route.h> /* for struct rtable and routing */
#include <net/icmp.h> /* icmp_send */
#include <asm/param.h> /* for HZ */
#endif
-struct net_device *clip_devs = NULL;
-struct atm_vcc *atmarpd = NULL;
+static struct net_device *clip_devs;
+static struct atm_vcc *atmarpd;
static struct neigh_table clip_tbl;
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)
+static int to_atmarpd(enum atmarp_ctrl_type type, int itf, unsigned long ip)
{
+ struct sock *sk;
struct atmarp_ctrl *ctrl;
struct sk_buff *skb;
- DPRINTK("to_atmarpd(%d)\n",type);
- if (!atmarpd) return -EUNATCH;
+ DPRINTK("to_atmarpd(%d)\n", type);
+ if (!atmarpd)
+ return -EUNATCH;
skb = alloc_skb(sizeof(struct atmarp_ctrl),GFP_ATOMIC);
- if (!skb) return -ENOMEM;
+ 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->sk->sk_receive_queue, skb);
- atmarpd->sk->sk_data_ready(atmarpd->sk, skb->len);
+ atm_force_charge(atmarpd, skb->truesize);
+
+ sk = sk_atm(atmarpd);
+ skb_queue_tail(&sk->sk_receive_queue, skb);
+ sk->sk_data_ready(sk, skb->len);
return 0;
}
-
-static void link_vcc(struct clip_vcc *clip_vcc,struct atmarp_entry *entry)
+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);
+ 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->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);
+ printk(KERN_CRIT "!clip_vcc->entry (clip_vcc %p)\n", clip_vcc);
return;
}
spin_lock_bh(&entry->neigh->dev->xmit_lock); /* block clip_start_xmit() */
if (*walk == clip_vcc) {
int error;
- *walk = clip_vcc->next; /* atomic */
+ *walk = clip_vcc->next; /* atomic */
clip_vcc->entry = NULL;
if (clip_vcc->xoff)
netif_wake_queue(entry->neigh->dev);
if (entry->vccs)
goto out;
- entry->expires = jiffies-1;
- /* force resolution or expiration */
- error = neigh_update(entry->neigh,NULL,NUD_NONE,0,0);
+ entry->expires = jiffies - 1;
+ /* force resolution or expiration */
+ error = neigh_update(entry->neigh, NULL, NUD_NONE,
+ NEIGH_UPDATE_F_ADMIN);
if (error)
printk(KERN_CRIT "unlink_clip_vcc: "
- "neigh_update failed with %d\n",error);
+ "neigh_update failed with %d\n", error);
goto out;
}
printk(KERN_CRIT "ATMARP: unlink_clip_vcc failed (entry %p, vcc "
- "0x%p)\n",entry,clip_vcc);
-out:
+ "0x%p)\n", entry, clip_vcc);
+ out:
spin_unlock_bh(&entry->neigh->dev->xmit_lock);
}
-
-static void idle_timer_check(unsigned long dummy)
+/* The neighbour entry n->lock is held. */
+static int neigh_check_cb(struct neighbour *n)
{
- int i;
+ struct atmarp_entry *entry = NEIGH2ENTRY(n);
+ struct clip_vcc *cv;
- /*DPRINTK("idle_timer_check\n");*/
- 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;
-
- write_lock(&n->lock);
-
- 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 %p\n",clip_vcc,clip_vcc->vcc,
- entry);
- vcc_release_async(clip_vcc->vcc,
- -ETIMEDOUT);
- }
- if (entry->vccs ||
- time_before(jiffies, entry->expires)) {
- np = &n->next;
- write_unlock(&n->lock);
- continue;
- }
- if (atomic_read(&n->refcnt) > 1) {
- struct sk_buff *skb;
-
- DPRINTK("destruction postponed with ref %d\n",
- atomic_read(&n->refcnt));
- while ((skb = skb_dequeue(&n->arp_queue)) !=
- NULL)
- dev_kfree_skb(skb);
- np = &n->next;
- write_unlock(&n->lock);
- continue;
- }
- *np = n->next;
- DPRINTK("expired neigh %p\n",n);
- n->dead = 1;
- write_unlock(&n->lock);
- neigh_release(n);
+ for (cv = entry->vccs; cv; cv = cv->next) {
+ unsigned long exp = cv->last_use + cv->idle_timeout;
+
+ if (cv->idle_timeout && time_after(jiffies, exp)) {
+ DPRINTK("releasing vcc %p->%p of entry %p\n",
+ cv, cv->vcc, entry);
+ vcc_release_async(cv->vcc, -ETIMEDOUT);
}
}
- mod_timer(&idle_timer, jiffies+CLIP_CHECK_INTERVAL*HZ);
- write_unlock(&clip_tbl.lock);
+
+ if (entry->vccs || time_before(jiffies, entry->expires))
+ return 0;
+
+ if (atomic_read(&n->refcnt) > 1) {
+ struct sk_buff *skb;
+
+ DPRINTK("destruction postponed with ref %d\n",
+ atomic_read(&n->refcnt));
+
+ while ((skb = skb_dequeue(&n->arp_queue)) != NULL)
+ dev_kfree_skb(skb);
+
+ return 0;
+ }
+
+ DPRINTK("expired neigh %p\n", n);
+ return 1;
}
+static void idle_timer_check(unsigned long dummy)
+{
+ write_lock(&clip_tbl.lock);
+ __neigh_for_each_release(&clip_tbl, neigh_check_cb);
+ mod_timer(&idle_timer, jiffies + CLIP_CHECK_INTERVAL * HZ);
+ write_unlock(&clip_tbl.lock);
+}
static int clip_arp_rcv(struct sk_buff *skb)
{
DPRINTK("clip_arp_rcv\n");
vcc = ATM_SKB(skb)->vcc;
- if (!vcc || !atm_charge(vcc,skb->truesize)) {
+ if (!vcc || !atm_charge(vcc, skb->truesize)) {
dev_kfree_skb_any(skb);
return 0;
}
- DPRINTK("pushing to %p\n",vcc);
- DPRINTK("using %p\n",CLIP_VCC(vcc)->old_push);
- CLIP_VCC(vcc)->old_push(vcc,skb);
+ DPRINTK("pushing to %p\n", vcc);
+ DPRINTK("using %p\n", CLIP_VCC(vcc)->old_push);
+ CLIP_VCC(vcc)->old_push(vcc, skb);
return 0;
}
0x03, /* Ctrl: Unnumbered Information Command PDU */
0x00, /* OUI: EtherType */
0x00,
- 0x00 };
+ 0x00
+};
-static void clip_push(struct atm_vcc *vcc,struct sk_buff *skb)
+static void clip_push(struct atm_vcc *vcc, struct sk_buff *skb)
{
struct clip_vcc *clip_vcc = CLIP_VCC(vcc);
DPRINTK("clip push\n");
if (!skb) {
- DPRINTK("removing VCC %p\n",clip_vcc);
- if (clip_vcc->entry) unlink_clip_vcc(clip_vcc);
- clip_vcc->old_push(vcc,NULL); /* pass on the bad news */
+ DPRINTK("removing VCC %p\n", 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);
+ 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 */
+ /* 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);
+ 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);
+ 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;
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)
+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);
+ 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);
+ 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);
+ spin_unlock_irqrestore(&PRIV(dev)->xoff_lock, flags);
}
-
static void clip_neigh_destroy(struct neighbour *neigh)
{
- DPRINTK("clip_neigh_destroy (neigh %p)\n",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)
+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);
+ 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)
+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);
+ 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,
.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;
+ struct in_device *in_dev;
+ struct neigh_parms *parms;
- DPRINTK("clip_constructor (neigh %p, entry %p)\n",neigh,entry);
- if (!in_dev) return -EINVAL;
+ DPRINTK("clip_constructor (neigh %p, entry %p)\n", neigh, entry);
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;
+ if (neigh->type != RTN_UNICAST)
+ return -EINVAL;
+
+ rcu_read_lock();
+ in_dev = __in_dev_get_rcu(dev);
+ if (!in_dev) {
+ rcu_read_unlock();
+ return -EINVAL;
+ }
+
+ parms = in_dev->arp_parms;
+ __neigh_parms_put(neigh->parms);
+ neigh->parms = neigh_parms_clone(parms);
+ rcu_read_unlock();
+
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;
+ 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;
+ return jhash_2words(*(u32 *) pkey, dev->ifindex, clip_tbl.hash_rnd);
}
static struct neigh_table clip_tbl = {
/* parameters are copied from ARP ... */
.parms = {
.tbl = &clip_tbl,
+ .neigh_destructor = clip_neigh_destroy,
.base_reachable_time = 30 * HZ,
.retrans_time = 1 * HZ,
.gc_staletime = 60 * HZ,
.gc_thresh3 = 1024,
};
-
/* @@@ copy bh locking from arp.c -- need to bh-enable atm code before */
/*
* clip_setentry.
*/
-
-static int clip_encap(struct atm_vcc *vcc,int mode)
+static 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)
+static int clip_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct clip_priv *clip_priv = PRIV(dev);
struct atmarp_entry *entry;
int old;
unsigned long flags;
- DPRINTK("clip_start_xmit (skb %p)\n",skb);
+ DPRINTK("clip_start_xmit (skb %p)\n", skb);
if (!skb->dst) {
printk(KERN_ERR "clip_start_xmit: skb->dst == NULL\n");
dev_kfree_skb(skb);
}
if (!skb->dst->neighbour) {
#if 0
- skb->dst->neighbour = clip_find_neighbour(skb->dst,1);
+ skb->dst->neighbour = clip_find_neighbour(skb->dst, 1);
if (!skb->dst->neighbour) {
- dev_kfree_skb(skb); /* lost that one */
+ dev_kfree_skb(skb); /* lost that one */
clip_priv->stats.tx_dropped++;
return 0;
}
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);
+ 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);
+ skb_queue_tail(&entry->neigh->arp_queue, skb);
else {
dev_kfree_skb(skb);
clip_priv->stats.tx_dropped++;
}
return 0;
}
- DPRINTK("neigh %p, vccs %p\n",entry,entry->vccs);
+ DPRINTK("neigh %p, vccs %p\n", entry, entry->vccs);
ATM_SKB(skb)->vcc = vcc = entry->vccs->vcc;
- DPRINTK("using neighbour %p, vcc %p\n",skb->dst->neighbour,vcc);
+ DPRINTK("using neighbour %p, vcc %p\n", skb->dst->neighbour, vcc);
if (entry->vccs->encap) {
void *here;
- here = skb_push(skb,RFC1483LLC_LEN);
- memcpy(here,llc_oui,sizeof(llc_oui));
+ here = skb_push(skb, RFC1483LLC_LEN);
+ memcpy(here, llc_oui, sizeof(llc_oui));
((u16 *) here)[3] = skb->protocol;
}
- atomic_add(skb->truesize, &vcc->sk->sk_wmem_alloc);
+ atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
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 ... */
+ 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 transition\n");
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)) {
+ 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 */
+ 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);
+ /* 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;
}
-
-static int clip_mkip(struct atm_vcc *vcc,int timeout)
+static 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 %p\n",clip_vcc,vcc);
+ 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 %p\n", clip_vcc, vcc);
clip_vcc->vcc = vcc;
vcc->user_back = clip_vcc;
set_bit(ATM_VF_IS_CLIP, &vcc->flags);
clip_vcc->xoff = 0;
clip_vcc->encap = 1;
clip_vcc->last_use = jiffies;
- clip_vcc->idle_timeout = timeout*HZ;
+ 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->sk->sk_receive_queue, ©);
+ skb_migrate(&sk_atm(vcc)->sk_receive_queue, ©);
/* re-process everything received between connection setup and MKIP */
while ((skb = skb_dequeue(©)) != NULL)
if (!clip_devs) {
- atm_return(vcc,skb->truesize);
+ atm_return(vcc, skb->truesize);
kfree_skb(skb);
- }
- else {
+ } else {
unsigned int len = skb->len;
- clip_push(vcc,skb);
+ clip_push(vcc, skb);
PRIV(skb->dev)->stats.rx_packets--;
PRIV(skb->dev)->stats.rx_bytes -= len;
}
return 0;
}
-
-static int clip_setentry(struct atm_vcc *vcc,u32 ip)
+static int clip_setentry(struct atm_vcc *vcc, u32 ip)
{
struct neighbour *neigh;
struct atmarp_entry *entry;
int error;
struct clip_vcc *clip_vcc;
- struct flowi fl = { .nl_u = { .ip4_u = { .daddr = ip, .tos = 1 } } };
+ struct flowi fl = { .nl_u = { .ip4_u = { .daddr = ip, .tos = 1}} };
struct rtable *rt;
if (vcc->push != clip_push) {
unlink_clip_vcc(clip_vcc);
return 0;
}
- error = ip_route_output_key(&rt,&fl);
- if (error) return error;
- neigh = __neigh_lookup(&clip_tbl,&ip,rt->u.dst.dev,1);
+ error = ip_route_output_key(&rt, &fl);
+ 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: add\n");
+ if (!clip_vcc->entry)
+ DPRINTK("setentry: add\n");
else {
DPRINTK("setentry: update\n");
unlink_clip_vcc(clip_vcc);
}
- link_vcc(clip_vcc,entry);
+ link_vcc(clip_vcc, entry);
}
- error = neigh_update(neigh,llc_oui,NUD_PERMANENT,1,0);
+ error = neigh_update(neigh, llc_oui, NUD_PERMANENT,
+ NEIGH_UPDATE_F_OVERRIDE | NEIGH_UPDATE_F_ADMIN);
neigh_release(neigh);
return error;
}
-
static void clip_setup(struct net_device *dev)
{
dev->hard_start_xmit = clip_start_xmit;
dev->type = ARPHRD_ATM;
dev->hard_header_len = RFC1483LLC_LEN;
dev->mtu = RFC1626_MTU;
- 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->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. */
}
-
static int clip_create(int number)
{
struct net_device *dev;
if (number != -1) {
for (dev = clip_devs; dev; dev = PRIV(dev)->next)
- if (PRIV(dev)->number == number) return -EEXIST;
- }
- else {
+ 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;
+ number = PRIV(dev)->number + 1;
}
dev = alloc_netdev(sizeof(struct clip_priv), "", clip_setup);
if (!dev)
return -ENOMEM;
clip_priv = PRIV(dev);
- sprintf(dev->name,"atm%d",number);
+ sprintf(dev->name, "atm%d", number);
spin_lock_init(&clip_priv->xoff_lock);
clip_priv->number = number;
error = register_netdev(dev);
}
clip_priv->next = clip_devs;
clip_devs = dev;
- DPRINTK("registered (net:%s)\n",dev->name);
+ DPRINTK("registered (net:%s)\n", dev->name);
return number;
}
-
-static int clip_device_event(struct notifier_block *this,unsigned long event,
- void *dev)
+static int clip_device_event(struct notifier_block *this, unsigned long event,
+ void *arg)
{
+ struct net_device *dev = arg;
+
+ if (event == NETDEV_UNREGISTER) {
+ neigh_ifdown(&clip_tbl, dev);
+ return NOTIFY_DONE;
+ }
+
/* ignore non-CLIP devices */
- if (((struct net_device *) dev)->type != ARPHRD_ATM ||
- ((struct net_device *) dev)->hard_start_xmit != clip_start_xmit)
+ if (dev->type != ARPHRD_ATM || dev->hard_start_xmit != clip_start_xmit)
return NOTIFY_DONE;
+
switch (event) {
- case NETDEV_UP:
- DPRINTK("clip_device_event NETDEV_UP\n");
- (void) to_atmarpd(act_up,PRIV(dev)->number,0);
- break;
- case NETDEV_GOING_DOWN:
- DPRINTK("clip_device_event NETDEV_DOWN\n");
- (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 %ld\n",event);
- /* ignore */
- break;
- default:
- printk(KERN_WARNING "clip_device_event: unknown event "
- "%ld\n",event);
- break;
+ case NETDEV_UP:
+ DPRINTK("clip_device_event NETDEV_UP\n");
+ to_atmarpd(act_up, PRIV(dev)->number, 0);
+ break;
+ case NETDEV_GOING_DOWN:
+ DPRINTK("clip_device_event NETDEV_DOWN\n");
+ to_atmarpd(act_down, PRIV(dev)->number, 0);
+ break;
+ case NETDEV_CHANGE:
+ case NETDEV_CHANGEMTU:
+ DPRINTK("clip_device_event NETDEV_CHANGE*\n");
+ to_atmarpd(act_change, PRIV(dev)->number, 0);
+ break;
}
return NOTIFY_DONE;
}
-
-static int clip_inet_event(struct notifier_block *this,unsigned long event,
- void *ifa)
+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;
+ in_dev = ((struct in_ifaddr *)ifa)->ifa_dev;
if (!in_dev || !in_dev->dev) {
printk(KERN_WARNING "clip_inet_event: no device\n");
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);
+ 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
+ .notifier_call = clip_device_event,
};
static struct notifier_block clip_inet_notifier = {
- clip_inet_event,
- NULL,
- 0
+ .notifier_call = clip_inet_event,
};
static void atmarpd_close(struct atm_vcc *vcc)
{
DPRINTK("atmarpd_close\n");
- atmarpd = NULL; /* assumed to be atomic */
- barrier();
- unregister_inetaddr_notifier(&clip_inet_notifier);
- unregister_netdevice_notifier(&clip_dev_notifier);
- if (skb_peek(&vcc->sk->sk_receive_queue))
- printk(KERN_ERR "atmarpd_close: closing with requests "
- "pending\n");
- skb_queue_purge(&vcc->sk->sk_receive_queue);
+
+ rtnl_lock();
+ atmarpd = NULL;
+ skb_queue_purge(&sk_atm(vcc)->sk_receive_queue);
+ rtnl_unlock();
+
DPRINTK("(done)\n");
module_put(THIS_MODULE);
}
static int atm_init_atmarp(struct atm_vcc *vcc)
{
- 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);
+ rtnl_lock();
+ if (atmarpd) {
+ rtnl_unlock();
+ return -EADDRINUSE;
}
+
+ mod_timer(&idle_timer, jiffies+CLIP_CHECK_INTERVAL*HZ);
+
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 */
vcc->dev = &atmarpd_dev;
- vcc_insert_socket(vcc->sk);
+ vcc_insert_socket(sk_atm(vcc));
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 failed\n");
- if (register_inetaddr_notifier(&clip_inet_notifier))
- printk(KERN_ERR "register_inetaddr_notifier failed\n");
+ rtnl_unlock();
return 0;
}
int err = 0;
switch (cmd) {
- case SIOCMKCLIP:
- case ATMARPD_CTRL:
- case ATMARP_MKIP:
- case ATMARP_SETENTRY:
- case ATMARP_ENCAP:
- if (!capable(CAP_NET_ADMIN))
- return -EPERM;
- break;
- default:
- return -ENOIOCTLCMD;
+ case SIOCMKCLIP:
+ case ATMARPD_CTRL:
+ case ATMARP_MKIP:
+ case ATMARP_SETENTRY:
+ case ATMARP_ENCAP:
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+ break;
+ default:
+ return -ENOIOCTLCMD;
}
switch (cmd) {
- case SIOCMKCLIP:
- err = clip_create(arg);
- break;
- case ATMARPD_CTRL:
- err = atm_init_atmarp(vcc);
- if (!err) {
- sock->state = SS_CONNECTED;
- __module_get(THIS_MODULE);
- }
- break;
- case ATMARP_MKIP:
- err = clip_mkip(vcc ,arg);
- break;
- case ATMARP_SETENTRY:
- err = clip_setentry(vcc, arg);
- break;
- case ATMARP_ENCAP:
- err = clip_encap(vcc, arg);
- break;
+ case SIOCMKCLIP:
+ err = clip_create(arg);
+ break;
+ case ATMARPD_CTRL:
+ err = atm_init_atmarp(vcc);
+ if (!err) {
+ sock->state = SS_CONNECTED;
+ __module_get(THIS_MODULE);
+ }
+ break;
+ case ATMARP_MKIP:
+ err = clip_mkip(vcc, arg);
+ break;
+ case ATMARP_SETENTRY:
+ err = clip_setentry(vcc, arg);
+ break;
+ case ATMARP_ENCAP:
+ err = clip_encap(vcc, arg);
+ break;
}
return err;
}
static struct atm_ioctl clip_ioctl_ops = {
- .owner = THIS_MODULE,
- .ioctl = clip_ioctl,
+ .owner = THIS_MODULE,
+ .ioctl = clip_ioctl,
};
#ifdef CONFIG_PROC_FS
static void svc_addr(struct seq_file *seq, struct sockaddr_atmsvc *addr)
{
- static int code[] = { 1,2,10,6,1,0 };
- static int e164[] = { 1,8,4,6,1,0 };
+ static int code[] = { 1, 2, 10, 6, 1, 0 };
+ static int e164[] = { 1, 8, 4, 6, 1, 0 };
if (*addr->sas_addr.pub) {
seq_printf(seq, "%s", addr->sas_addr.pub);
for (i = 0; fields[i]; i++) {
for (j = fields[i]; j; j--)
seq_printf(seq, "%02X", *prv++);
- if (fields[i+1])
+ if (fields[i + 1])
seq_putc(seq, '.');
}
}
}
+/* This means the neighbour entry has no attached VCC objects. */
+#define SEQ_NO_VCC_TOKEN ((void *) 2)
+
static void atmarp_info(struct seq_file *seq, struct net_device *dev,
struct atmarp_entry *entry, struct clip_vcc *clip_vcc)
{
+ unsigned long exp;
char buf[17];
- int svc, off;
+ int svc, llc, off;
+
+ svc = ((clip_vcc == SEQ_NO_VCC_TOKEN) ||
+ (sk_atm(clip_vcc->vcc)->sk_family == AF_ATMSVC));
- svc = !clip_vcc || clip_vcc->vcc->sk->sk_family == AF_ATMSVC;
- seq_printf(seq, "%-6s%-4s%-4s%5ld ", dev->name, svc ? "SVC" : "PVC",
- !clip_vcc || clip_vcc->encap ? "LLC" : "NULL",
- (jiffies-(clip_vcc ? clip_vcc->last_use : entry->neigh->used))/HZ);
+ llc = ((clip_vcc == SEQ_NO_VCC_TOKEN) || clip_vcc->encap);
- off = scnprintf(buf, sizeof(buf) - 1, "%d.%d.%d.%d", NIPQUAD(entry->ip));
+ if (clip_vcc == SEQ_NO_VCC_TOKEN)
+ exp = entry->neigh->used;
+ else
+ exp = clip_vcc->last_use;
+
+ exp = (jiffies - exp) / HZ;
+
+ seq_printf(seq, "%-6s%-4s%-4s%5ld ",
+ dev->name, svc ? "SVC" : "PVC", llc ? "LLC" : "NULL", exp);
+
+ off = scnprintf(buf, sizeof(buf) - 1, "%d.%d.%d.%d",
+ NIPQUAD(entry->ip));
while (off < 16)
buf[off++] = ' ';
buf[off] = '\0';
seq_printf(seq, "%s", buf);
- if (!clip_vcc) {
+ if (clip_vcc == SEQ_NO_VCC_TOKEN) {
if (time_before(jiffies, entry->expires))
seq_printf(seq, "(resolving)\n");
else
seq_printf(seq, "(expired, ref %d)\n",
atomic_read(&entry->neigh->refcnt));
} else if (!svc) {
- seq_printf(seq, "%d.%d.%d\n", clip_vcc->vcc->dev->number,
+ seq_printf(seq, "%d.%d.%d\n",
+ clip_vcc->vcc->dev->number,
clip_vcc->vcc->vpi, clip_vcc->vcc->vci);
} else {
svc_addr(seq, &clip_vcc->vcc->remote);
}
}
-struct arp_state {
- int bucket;
- struct neighbour *n;
+struct clip_seq_state {
+ /* This member must be first. */
+ struct neigh_seq_state ns;
+
+ /* Local to clip specific iteration. */
struct clip_vcc *vcc;
};
-
-static void *arp_vcc_walk(struct arp_state *state,
- struct atmarp_entry *e, loff_t *l)
-{
- struct clip_vcc *vcc = state->vcc;
- if (!vcc)
- vcc = e->vccs;
- if (vcc == (void *)1) {
- vcc = e->vccs;
- --*l;
- }
- for (; vcc; vcc = vcc->next) {
- if (--*l < 0)
- break;
- }
- state->vcc = vcc;
- return (*l < 0) ? state : NULL;
-}
-
-static void *arp_get_idx(struct arp_state *state, loff_t l)
+static struct clip_vcc *clip_seq_next_vcc(struct atmarp_entry *e,
+ struct clip_vcc *curr)
{
- void *v = NULL;
-
- for (; state->bucket <= NEIGH_HASHMASK; state->bucket++) {
- for (; state->n; state->n = state->n->next) {
- v = arp_vcc_walk(state, NEIGH2ENTRY(state->n), &l);
- if (v)
- goto done;
- }
- state->n = clip_tbl.hash_buckets[state->bucket + 1];
+ if (!curr) {
+ curr = e->vccs;
+ if (!curr)
+ return SEQ_NO_VCC_TOKEN;
+ return curr;
}
-done:
- return v;
+ if (curr == SEQ_NO_VCC_TOKEN)
+ return NULL;
+
+ curr = curr->next;
+
+ return curr;
}
-static void *arp_seq_start(struct seq_file *seq, loff_t *pos)
+static void *clip_seq_vcc_walk(struct clip_seq_state *state,
+ struct atmarp_entry *e, loff_t * pos)
{
- struct arp_state *state = seq->private;
- void *ret = (void *)1;
-
- read_lock_bh(&clip_tbl.lock);
- state->bucket = 0;
- state->n = clip_tbl.hash_buckets[0];
- state->vcc = (void *)1;
- if (*pos)
- ret = arp_get_idx(state, *pos);
- return ret;
+ struct clip_vcc *vcc = state->vcc;
+
+ vcc = clip_seq_next_vcc(e, vcc);
+ if (vcc && pos != NULL) {
+ while (*pos) {
+ vcc = clip_seq_next_vcc(e, vcc);
+ if (!vcc)
+ break;
+ --(*pos);
+ }
+ }
+ state->vcc = vcc;
+
+ return vcc;
}
-static void arp_seq_stop(struct seq_file *seq, void *v)
+static void *clip_seq_sub_iter(struct neigh_seq_state *_state,
+ struct neighbour *n, loff_t * pos)
{
- struct arp_state *state = seq->private;
+ struct clip_seq_state *state = (struct clip_seq_state *)_state;
- if (state->bucket != -1)
- read_unlock_bh(&clip_tbl.lock);
+ return clip_seq_vcc_walk(state, NEIGH2ENTRY(n), pos);
}
-static void *arp_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+static void *clip_seq_start(struct seq_file *seq, loff_t * pos)
{
- struct arp_state *state = seq->private;
-
- v = arp_get_idx(state, 1);
- *pos += !!PTR_ERR(v);
- return v;
+ return neigh_seq_start(seq, pos, &clip_tbl, NEIGH_SEQ_NEIGH_ONLY);
}
-static int arp_seq_show(struct seq_file *seq, void *v)
+static int clip_seq_show(struct seq_file *seq, void *v)
{
- static char atm_arp_banner[] =
- "IPitf TypeEncp Idle IP address ATM address\n";
+ static char atm_arp_banner[] =
+ "IPitf TypeEncp Idle IP address ATM address\n";
- if (v == (void *)1)
+ if (v == SEQ_START_TOKEN) {
seq_puts(seq, atm_arp_banner);
- else {
- struct arp_state *state = seq->private;
- struct neighbour *n = state->n;
+ } else {
+ struct clip_seq_state *state = seq->private;
+ struct neighbour *n = v;
struct clip_vcc *vcc = state->vcc;
atmarp_info(seq, n->dev, NEIGH2ENTRY(n), vcc);
}
- return 0;
+ return 0;
}
static struct seq_operations arp_seq_ops = {
- .start = arp_seq_start,
- .next = arp_seq_next,
- .stop = arp_seq_stop,
- .show = arp_seq_show,
+ .start = clip_seq_start,
+ .next = neigh_seq_next,
+ .stop = neigh_seq_stop,
+ .show = clip_seq_show,
};
static int arp_seq_open(struct inode *inode, struct file *file)
{
- struct arp_state *state;
+ struct clip_seq_state *state;
struct seq_file *seq;
int rc = -EAGAIN;
rc = -ENOMEM;
goto out_kfree;
}
+ memset(state, 0, sizeof(*state));
+ state->ns.neigh_sub_iter = clip_seq_sub_iter;
rc = seq_open(file, &arp_seq_ops);
if (rc)
goto out;
}
-static int arp_seq_release(struct inode *inode, struct file *file)
-{
- return seq_release_private(inode, file);
-}
-
static struct file_operations arp_seq_fops = {
.open = arp_seq_open,
.read = seq_read,
.llseek = seq_lseek,
- .release = arp_seq_release,
+ .release = seq_release_private,
.owner = THIS_MODULE
};
#endif
static int __init atm_clip_init(void)
{
- /* we should use neigh_table_init() */
- 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);
-
- if (!clip_tbl.kmem_cachep)
- return -ENOMEM;
-
- /* so neigh_ifdown() doesn't complain */
- clip_tbl.proxy_timer.data = 0;
- clip_tbl.proxy_timer.function = NULL;
- init_timer(&clip_tbl.proxy_timer);
- skb_queue_head_init(&clip_tbl.proxy_queue);
+ struct proc_dir_entry *p;
+ neigh_table_init_no_netlink(&clip_tbl);
clip_tbl_hook = &clip_tbl;
register_atm_ioctl(&clip_ioctl_ops);
+ register_netdevice_notifier(&clip_dev_notifier);
+ register_inetaddr_notifier(&clip_inet_notifier);
-#ifdef CONFIG_PROC_FS
-{
- struct proc_dir_entry *p;
+ setup_timer(&idle_timer, idle_timer_check, 0);
p = create_proc_entry("arp", S_IRUGO, atm_proc_root);
if (p)
p->proc_fops = &arp_seq_fops;
-}
-#endif
return 0;
}
remove_proc_entry("arp", atm_proc_root);
+ unregister_inetaddr_notifier(&clip_inet_notifier);
+ unregister_netdevice_notifier(&clip_dev_notifier);
+
deregister_atm_ioctl(&clip_ioctl_ops);
+ /* First, stop the idle timer, so it stops banging
+ * on the table.
+ */
+ del_timer_sync(&idle_timer);
+
+ /* Next, purge the table, so that the device
+ * unregister loop below does not hang due to
+ * device references remaining in the table.
+ */
neigh_ifdown(&clip_tbl, NULL);
+
dev = clip_devs;
while (dev) {
next = PRIV(dev)->next;
free_netdev(dev);
dev = next;
}
- if (start_timer == 0) del_timer(&idle_timer);
- kmem_cache_destroy(clip_tbl.kmem_cachep);
+ /* Now it is safe to fully shutdown whole table. */
+ neigh_table_clear(&clip_tbl);
clip_tbl_hook = NULL;
}
module_init(atm_clip_init);
module_exit(atm_clip_exit);
-
+MODULE_AUTHOR("Werner Almesberger");
+MODULE_DESCRIPTION("Classical/IP over ATM interface");
MODULE_LICENSE("GPL");
git://git.onelab.eu / linux-2.6.git / blobdiff