aboutsummaryrefslogtreecommitdiffstats
path: root/net/atm/clip.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/atm/clip.c')
-rw-r--r--net/atm/clip.c460
1 files changed, 218 insertions, 242 deletions
diff --git a/net/atm/clip.c b/net/atm/clip.c
index 3ab4e79..1a786bf 100644
--- a/net/atm/clip.c
+++ b/net/atm/clip.c
@@ -2,7 +2,6 @@
/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
-
#include <linux/config.h>
#include <linux/string.h>
#include <linux/errno.h>
@@ -54,24 +53,24 @@ 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);
+ atm_force_charge(atmarpd, skb->truesize);
sk = sk_atm(atmarpd);
skb_queue_tail(&sk->sk_receive_queue, skb);
@@ -79,26 +78,24 @@ static int to_atmarpd(enum atmarp_ctrl_type type,int itf,unsigned long ip)
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() */
@@ -107,24 +104,24 @@ static void unlink_clip_vcc(struct clip_vcc *clip_vcc)
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 */
+ 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);
}
@@ -153,13 +150,13 @@ static int neigh_check_cb(struct neighbour *n)
DPRINTK("destruction postponed with ref %d\n",
atomic_read(&n->refcnt));
- while ((skb = skb_dequeue(&n->arp_queue)) != NULL)
+ while ((skb = skb_dequeue(&n->arp_queue)) != NULL)
dev_kfree_skb(skb);
return 0;
}
- DPRINTK("expired neigh %p\n",n);
+ DPRINTK("expired neigh %p\n", n);
return 1;
}
@@ -167,7 +164,7 @@ 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);
+ mod_timer(&idle_timer, jiffies + CLIP_CHECK_INTERVAL * HZ);
write_unlock(&clip_tbl.lock);
}
@@ -177,13 +174,13 @@ 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;
}
@@ -193,34 +190,38 @@ static const unsigned char llc_oui[] = {
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;
@@ -235,58 +236,54 @@ static void clip_push(struct atm_vcc *vcc,struct sk_buff *skb)
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,
.solicit = clip_neigh_solicit,
@@ -297,7 +294,6 @@ static struct neigh_ops clip_neigh_ops = {
.queue_xmit = dev_queue_xmit,
};
-
static int clip_constructor(struct neighbour *neigh)
{
struct atmarp_entry *entry = NEIGH2ENTRY(neigh);
@@ -305,9 +301,10 @@ static int clip_constructor(struct neighbour *neigh)
struct in_device *in_dev;
struct neigh_parms *parms;
- DPRINTK("clip_constructor (neigh %p, entry %p)\n",neigh,entry);
+ 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 (neigh->type != RTN_UNICAST)
+ return -EINVAL;
rcu_read_lock();
in_dev = __in_dev_get_rcu(dev);
@@ -326,13 +323,13 @@ static int clip_constructor(struct neighbour *neigh)
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)
{
- return jhash_2words(*(u32 *)pkey, dev->ifindex, clip_tbl.hash_rnd);
+ return jhash_2words(*(u32 *) pkey, dev->ifindex, clip_tbl.hash_rnd);
}
static struct neigh_table clip_tbl = {
@@ -366,7 +363,6 @@ static struct neigh_table clip_tbl = {
.gc_thresh3 = 1024,
};
-
/* @@@ copy bh locking from arp.c -- need to bh-enable atm code before */
/*
@@ -376,15 +372,13 @@ static struct neigh_table clip_tbl = {
* 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;
@@ -392,7 +386,7 @@ static int clip_start_xmit(struct sk_buff *skb,struct net_device *dev)
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);
@@ -401,9 +395,9 @@ static int clip_start_xmit(struct sk_buff *skb,struct net_device *dev)
}
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;
}
@@ -417,73 +411,73 @@ static int clip_start_xmit(struct sk_buff *skb,struct net_device *dev)
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, &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);
@@ -491,7 +485,7 @@ static int clip_mkip(struct atm_vcc *vcc,int timeout)
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;
@@ -501,27 +495,25 @@ static int clip_mkip(struct atm_vcc *vcc,int timeout)
/* re-process everything received between connection setup and MKIP */
while ((skb = skb_dequeue(&copy)) != 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) {
@@ -538,28 +530,29 @@ static int clip_setentry(struct atm_vcc *vcc,u32 ip)
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,
- NEIGH_UPDATE_F_OVERRIDE|NEIGH_UPDATE_F_ADMIN);
+ 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;
@@ -568,15 +561,14 @@ static void clip_setup(struct net_device *dev)
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;
@@ -585,19 +577,19 @@ static int clip_create(int number)
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);
@@ -607,53 +599,48 @@ static int clip_create(int number)
}
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;
@@ -662,23 +649,20 @@ static int clip_inet_event(struct notifier_block *this,unsigned long event,
* 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,
};
@@ -686,14 +670,12 @@ static struct notifier_block clip_inet_notifier = {
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(&sk_atm(vcc)->sk_receive_queue))
- printk(KERN_ERR "atmarpd_close: closing with requests "
- "pending\n");
+
+ rtnl_lock();
+ atmarpd = NULL;
skb_queue_purge(&sk_atm(vcc)->sk_receive_queue);
+ rtnl_unlock();
+
DPRINTK("(done)\n");
module_put(THIS_MODULE);
}
@@ -714,14 +696,14 @@ static struct atm_dev atmarpd_dev = {
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);
@@ -731,10 +713,7 @@ static int atm_init_atmarp(struct atm_vcc *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;
}
@@ -744,53 +723,53 @@ static int clip_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
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);
@@ -809,7 +788,7 @@ static void svc_addr(struct seq_file *seq, struct sockaddr_atmsvc *addr)
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, '.');
}
}
@@ -828,8 +807,7 @@ static void atmarp_info(struct seq_file *seq, struct net_device *dev,
svc = ((clip_vcc == SEQ_NO_VCC_TOKEN) ||
(sk_atm(clip_vcc->vcc)->sk_family == AF_ATMSVC));
- llc = ((clip_vcc == SEQ_NO_VCC_TOKEN) ||
- clip_vcc->encap);
+ llc = ((clip_vcc == SEQ_NO_VCC_TOKEN) || clip_vcc->encap);
if (clip_vcc == SEQ_NO_VCC_TOKEN)
exp = entry->neigh->used;
@@ -839,10 +817,7 @@ static void atmarp_info(struct seq_file *seq, struct net_device *dev,
exp = (jiffies - exp) / HZ;
seq_printf(seq, "%-6s%-4s%-4s%5ld ",
- dev->name,
- svc ? "SVC" : "PVC",
- llc ? "LLC" : "NULL",
- exp);
+ dev->name, svc ? "SVC" : "PVC", llc ? "LLC" : "NULL", exp);
off = scnprintf(buf, sizeof(buf) - 1, "%d.%d.%d.%d",
NIPQUAD(entry->ip));
@@ -860,8 +835,7 @@ static void atmarp_info(struct seq_file *seq, struct net_device *dev,
} else if (!svc) {
seq_printf(seq, "%d.%d.%d\n",
clip_vcc->vcc->dev->number,
- clip_vcc->vcc->vpi,
- clip_vcc->vcc->vci);
+ clip_vcc->vcc->vpi, clip_vcc->vcc->vci);
} else {
svc_addr(seq, &clip_vcc->vcc->remote);
seq_putc(seq, '\n');
@@ -894,7 +868,7 @@ static struct clip_vcc *clip_seq_next_vcc(struct atmarp_entry *e,
}
static void *clip_seq_vcc_walk(struct clip_seq_state *state,
- struct atmarp_entry *e, loff_t *pos)
+ struct atmarp_entry *e, loff_t * pos)
{
struct clip_vcc *vcc = state->vcc;
@@ -911,24 +885,24 @@ static void *clip_seq_vcc_walk(struct clip_seq_state *state,
return vcc;
}
-
+
static void *clip_seq_sub_iter(struct neigh_seq_state *_state,
- struct neighbour *n, loff_t *pos)
+ struct neighbour *n, loff_t * pos)
{
- struct clip_seq_state *state = (struct clip_seq_state *) _state;
+ struct clip_seq_state *state = (struct clip_seq_state *)_state;
return clip_seq_vcc_walk(state, NEIGH2ENTRY(n), pos);
}
-static void *clip_seq_start(struct seq_file *seq, loff_t *pos)
+static void *clip_seq_start(struct seq_file *seq, loff_t * pos)
{
return neigh_seq_start(seq, pos, &clip_tbl, NEIGH_SEQ_NEIGH_ONLY);
}
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 == SEQ_START_TOKEN) {
seq_puts(seq, atm_arp_banner);
@@ -939,7 +913,7 @@ static int clip_seq_show(struct seq_file *seq, void *v)
atmarp_info(seq, n->dev, NEIGH2ENTRY(n), vcc);
}
- return 0;
+ return 0;
}
static struct seq_operations arp_seq_ops = {
@@ -988,20 +962,19 @@ static struct file_operations arp_seq_fops = {
static int __init atm_clip_init(void)
{
+ struct proc_dir_entry *p;
neigh_table_init(&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;
}
@@ -1012,13 +985,15 @@ static void __exit atm_clip_exit(void)
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.
*/
- if (start_timer == 0)
- del_timer(&idle_timer);
+ del_timer_sync(&idle_timer);
/* Next, purge the table, so that the device
* unregister loop below does not hang due to
@@ -1042,5 +1017,6 @@ static void __exit atm_clip_exit(void)
module_init(atm_clip_init);
module_exit(atm_clip_exit);
-
+MODULE_AUTHOR("Werner Almesberger");
+MODULE_DESCRIPTION("Classical/IP over ATM interface");
MODULE_LICENSE("GPL");
generated by cgit v1.1 at 2024-12-26 11:13:14 +0000