/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
+#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
+
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/kernel.h> /* for UINT_MAX */
#include <linux/seq_file.h>
#include <linux/rcupdate.h>
#include <linux/jhash.h>
+#include <linux/slab.h>
#include <net/route.h> /* for struct rtable and routing */
#include <net/icmp.h> /* icmp_send */
-#include <asm/param.h> /* for HZ */
+#include <linux/param.h> /* for HZ */
+#include <linux/uaccess.h>
#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
-
-
static struct net_device *clip_devs;
static struct atm_vcc *atmarpd;
static struct neigh_table clip_tbl;
struct atmarp_ctrl *ctrl;
struct sk_buff *skb;
- DPRINTK("to_atmarpd(%d)\n", type);
+ pr_debug("(%d)\n", type);
if (!atmarpd)
return -EUNATCH;
- skb = alloc_skb(sizeof(struct atmarp_ctrl),GFP_ATOMIC);
+ 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 = (struct atmarp_ctrl *)skb_put(skb, sizeof(struct atmarp_ctrl));
ctrl->type = type;
ctrl->itf_num = itf;
ctrl->ip = ip;
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);
+ pr_debug("%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;
struct clip_vcc **walk;
if (!entry) {
- printk(KERN_CRIT "!clip_vcc->entry (clip_vcc %p)\n", clip_vcc);
+ pr_crit("!clip_vcc->entry (clip_vcc %p)\n", clip_vcc);
return;
}
netif_tx_lock_bh(entry->neigh->dev); /* block clip_start_xmit() */
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);
+ pr_crit("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:
+ pr_crit("ATMARP: failed (entry %p, vcc 0x%p)\n", entry, clip_vcc);
+out:
netif_tx_unlock_bh(entry->neigh->dev);
}
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);
+ pr_debug("releasing vcc %p->%p of entry %p\n",
+ cv, cv->vcc, entry);
vcc_release_async(cv->vcc, -ETIMEDOUT);
}
}
if (atomic_read(&n->refcnt) > 1) {
struct sk_buff *skb;
- DPRINTK("destruction postponed with ref %d\n",
- atomic_read(&n->refcnt));
+ pr_debug("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);
+ pr_debug("expired neigh %p\n", n);
return 1;
}
{
struct atm_vcc *vcc;
- DPRINTK("clip_arp_rcv\n");
+ pr_debug("\n");
vcc = ATM_SKB(skb)->vcc;
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);
+ pr_debug("pushing to %p\n", vcc);
+ pr_debug("using %p\n", CLIP_VCC(vcc)->old_push);
CLIP_VCC(vcc)->old_push(vcc, skb);
return 0;
}
{
struct clip_vcc *clip_vcc = CLIP_VCC(vcc);
- DPRINTK("clip push\n");
+ pr_debug("\n");
if (!skb) {
- DPRINTK("removing VCC %p\n", clip_vcc);
+ pr_debug("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 */
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_reset_mac_header(skb);
+ 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 = ((__be16 *) skb->data)[3];
+ skb->protocol = ((__be16 *)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;
+ skb->dev->stats.rx_packets++;
+ 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;
+ skb->dev->stats.rx_packets++;
+ skb->dev->stats.rx_bytes += skb->len;
memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
netif_rx(skb);
}
int old;
unsigned long flags;
- DPRINTK("clip_pop(vcc %p)\n", vcc);
+ pr_debug("(vcc %p)\n", vcc);
clip_vcc->old_pop(vcc, skb);
/* skb->dev == NULL in outbound ARP packets */
if (!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 *) NEIGHBOR_DEAD;
-}
-
static void clip_neigh_solicit(struct neighbour *neigh, struct sk_buff *skb)
{
- DPRINTK("clip_neigh_solicit (neigh %p, skb %p)\n", neigh, skb);
+ pr_debug("(neigh %p, skb %p)\n", neigh, skb);
to_atmarpd(act_need, PRIV(neigh->dev)->number, NEIGH2ENTRY(neigh)->ip);
}
kfree_skb(skb);
}
-static struct neigh_ops clip_neigh_ops = {
+static const struct neigh_ops clip_neigh_ops = {
.family = AF_INET,
.solicit = clip_neigh_solicit,
.error_report = clip_neigh_error,
struct in_device *in_dev;
struct neigh_parms *parms;
- DPRINTK("clip_constructor (neigh %p, entry %p)\n", neigh, entry);
- neigh->type = inet_addr_type(entry->ip);
+ pr_debug("(neigh %p, entry %p)\n", neigh, entry);
+ neigh->type = inet_addr_type(&init_net, entry->ip);
if (neigh->type != RTN_UNICAST)
return -EINVAL;
/* 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,
return 0;
}
-static int clip_start_xmit(struct sk_buff *skb, struct net_device *dev)
+static netdev_tx_t 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);
- if (!skb->dst) {
- printk(KERN_ERR "clip_start_xmit: skb->dst == NULL\n");
+ pr_debug("(skb %p)\n", skb);
+ if (!skb_dst(skb)) {
+ pr_err("skb_dst(skb) == NULL\n");
dev_kfree_skb(skb);
- clip_priv->stats.tx_dropped++;
- return 0;
+ dev->stats.tx_dropped++;
+ return NETDEV_TX_OK;
}
- if (!skb->dst->neighbour) {
+ if (!skb_dst(skb)->neighbour) {
#if 0
- skb->dst->neighbour = clip_find_neighbour(skb->dst, 1);
- if (!skb->dst->neighbour) {
+ skb_dst(skb)->neighbour = clip_find_neighbour(skb_dst(skb), 1);
+ if (!skb_dst(skb)->neighbour) {
dev_kfree_skb(skb); /* lost that one */
- clip_priv->stats.tx_dropped++;
+ dev->stats.tx_dropped++;
return 0;
}
#endif
- printk(KERN_ERR "clip_start_xmit: NO NEIGHBOUR !\n");
+ pr_err("NO NEIGHBOUR !\n");
dev_kfree_skb(skb);
- clip_priv->stats.tx_dropped++;
- return 0;
+ dev->stats.tx_dropped++;
+ return NETDEV_TX_OK;
}
- entry = NEIGH2ENTRY(skb->dst->neighbour);
+ entry = NEIGH2ENTRY(skb_dst(skb)->neighbour);
if (!entry->vccs) {
if (time_after(jiffies, entry->expires)) {
/* should be resolved */
skb_queue_tail(&entry->neigh->arp_queue, skb);
else {
dev_kfree_skb(skb);
- clip_priv->stats.tx_dropped++;
+ dev->stats.tx_dropped++;
}
- return 0;
+ return NETDEV_TX_OK;
}
- DPRINTK("neigh %p, vccs %p\n", entry, entry->vccs);
+ pr_debug("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);
+ pr_debug("using neighbour %p, vcc %p\n", skb_dst(skb)->neighbour, vcc);
if (entry->vccs->encap) {
void *here;
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);
+ pr_debug("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;
+ pr_warning("XOFF->XOFF transition\n");
+ return NETDEV_TX_OK;
}
- clip_priv->stats.tx_packets++;
- clip_priv->stats.tx_bytes += skb->len;
+ dev->stats.tx_packets++;
+ dev->stats.tx_bytes += skb->len;
vcc->send(vcc, skb);
if (atm_may_send(vcc, 0)) {
entry->vccs->xoff = 0;
- return 0;
+ return NETDEV_TX_OK;
}
spin_lock_irqsave(&clip_priv->xoff_lock, flags);
netif_stop_queue(dev); /* XOFF -> throttle immediately */
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;
+ return NETDEV_TX_OK;
}
static int clip_mkip(struct atm_vcc *vcc, int timeout)
{
+ struct sk_buff_head *rq, queue;
struct clip_vcc *clip_vcc;
- struct sk_buff_head copy;
- struct sk_buff *skb;
+ struct sk_buff *skb, *tmp;
+ unsigned long flags;
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);
+ pr_debug("%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->old_pop = vcc->pop;
vcc->push = clip_push;
vcc->pop = clip_pop;
- skb_queue_head_init(©);
- skb_migrate(&sk_atm(vcc)->sk_receive_queue, ©);
+
+ __skb_queue_head_init(&queue);
+ rq = &sk_atm(vcc)->sk_receive_queue;
+
+ spin_lock_irqsave(&rq->lock, flags);
+ skb_queue_splice_init(rq, &queue);
+ spin_unlock_irqrestore(&rq->lock, flags);
+
/* re-process everything received between connection setup and MKIP */
- while ((skb = skb_dequeue(©)) != NULL)
+ skb_queue_walk_safe(&queue, skb, tmp) {
if (!clip_devs) {
atm_return(vcc, skb->truesize);
kfree_skb(skb);
} else {
+ struct net_device *dev = skb->dev;
unsigned int len = skb->len;
skb_get(skb);
clip_push(vcc, skb);
- PRIV(skb->dev)->stats.rx_packets--;
- PRIV(skb->dev)->stats.rx_bytes -= len;
+ dev->stats.rx_packets--;
+ dev->stats.rx_bytes -= len;
kfree_skb(skb);
}
+ }
return 0;
}
struct rtable *rt;
if (vcc->push != clip_push) {
- printk(KERN_WARNING "clip_setentry: non-CLIP VCC\n");
+ pr_warning("non-CLIP VCC\n");
return -EBADF;
}
clip_vcc = CLIP_VCC(vcc);
if (!ip) {
if (!clip_vcc->entry) {
- printk(KERN_ERR "hiding hidden ATMARP entry\n");
+ pr_err("hiding hidden ATMARP entry\n");
return 0;
}
- DPRINTK("setentry: remove\n");
+ pr_debug("remove\n");
unlink_clip_vcc(clip_vcc);
return 0;
}
- error = ip_route_output_key(&rt, &fl);
+ error = ip_route_output_key(&init_net, &rt, &fl);
if (error)
return error;
neigh = __neigh_lookup(&clip_tbl, &ip, rt->u.dst.dev, 1);
entry = NEIGH2ENTRY(neigh);
if (entry != clip_vcc->entry) {
if (!clip_vcc->entry)
- DPRINTK("setentry: add\n");
+ pr_debug("add\n");
else {
- DPRINTK("setentry: update\n");
+ pr_debug("update\n");
unlink_clip_vcc(clip_vcc);
}
link_vcc(clip_vcc, entry);
return error;
}
+static const struct net_device_ops clip_netdev_ops = {
+ .ndo_start_xmit = clip_start_xmit,
+};
+
static void clip_setup(struct net_device *dev)
{
- dev->hard_start_xmit = clip_start_xmit;
- /* sg_xmit ... */
- dev->get_stats = clip_get_stats;
+ dev->netdev_ops = &clip_netdev_ops;
dev->type = ARPHRD_ATM;
dev->hard_header_len = RFC1483LLC_LEN;
dev->mtu = RFC1626_MTU;
/* without any more elaborate queuing. 100 is a reasonable */
/* compromise between decent burst-tolerance and protection */
/* against memory hogs. */
+ dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
}
static int clip_create(int number)
}
clip_priv->next = clip_devs;
clip_devs = dev;
- DPRINTK("registered (net:%s)\n", dev->name);
+ pr_debug("registered (net:%s)\n", dev->name);
return number;
}
{
struct net_device *dev = arg;
+ if (!net_eq(dev_net(dev), &init_net))
+ return NOTIFY_DONE;
+
if (event == NETDEV_UNREGISTER) {
neigh_ifdown(&clip_tbl, dev);
return NOTIFY_DONE;
}
/* ignore non-CLIP devices */
- if (dev->type != ARPHRD_ATM || dev->hard_start_xmit != clip_start_xmit)
+ if (dev->type != ARPHRD_ATM || dev->netdev_ops != &clip_netdev_ops)
return NOTIFY_DONE;
switch (event) {
case NETDEV_UP:
- DPRINTK("clip_device_event NETDEV_UP\n");
+ pr_debug("NETDEV_UP\n");
to_atmarpd(act_up, PRIV(dev)->number, 0);
break;
case NETDEV_GOING_DOWN:
- DPRINTK("clip_device_event NETDEV_DOWN\n");
+ pr_debug("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");
+ pr_debug("NETDEV_CHANGE*\n");
to_atmarpd(act_change, PRIV(dev)->number, 0);
break;
}
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 device\n");
- return NOTIFY_DONE;
- }
/*
* Transitions are of the down-change-up type, so it's sufficient to
* handle the change on up.
return clip_device_event(this, NETDEV_CHANGE, in_dev->dev);
}
-
static struct notifier_block clip_dev_notifier = {
.notifier_call = clip_device_event,
};
static void atmarpd_close(struct atm_vcc *vcc)
{
- DPRINTK("atmarpd_close\n");
+ pr_debug("\n");
rtnl_lock();
atmarpd = NULL;
skb_queue_purge(&sk_atm(vcc)->sk_receive_queue);
rtnl_unlock();
- DPRINTK("(done)\n");
+ pr_debug("(done)\n");
module_put(THIS_MODULE);
}
-
static struct atmdev_ops atmarpd_dev_ops = {
.close = atmarpd_close
};
.ops = &atmarpd_dev_ops,
.type = "arpd",
.number = 999,
- .lock = SPIN_LOCK_UNLOCKED
+ .lock = __SPIN_LOCK_UNLOCKED(atmarpd_dev.lock)
};
return -EADDRINUSE;
}
- mod_timer(&idle_timer, jiffies+CLIP_CHECK_INTERVAL*HZ);
+ 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);
+ 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(sk_atm(vcc));
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));
+ off = scnprintf(buf, sizeof(buf) - 1, "%pI4",
+ &entry->ip);
while (off < 16)
buf[off++] = ' ';
buf[off] = '\0';
static void *clip_seq_start(struct seq_file *seq, loff_t * pos)
{
+ struct clip_seq_state *state = seq->private;
+ state->ns.neigh_sub_iter = clip_seq_sub_iter;
return neigh_seq_start(seq, pos, &clip_tbl, NEIGH_SEQ_NEIGH_ONLY);
}
return 0;
}
-static struct seq_operations arp_seq_ops = {
+static const struct seq_operations arp_seq_ops = {
.start = clip_seq_start,
.next = neigh_seq_next,
.stop = neigh_seq_stop,
static int arp_seq_open(struct inode *inode, struct file *file)
{
- struct clip_seq_state *state;
- struct seq_file *seq;
- int rc = -EAGAIN;
-
- state = kzalloc(sizeof(*state), GFP_KERNEL);
- if (!state) {
- rc = -ENOMEM;
- goto out_kfree;
- }
- state->ns.neigh_sub_iter = clip_seq_sub_iter;
-
- rc = seq_open(file, &arp_seq_ops);
- if (rc)
- goto out_kfree;
-
- seq = file->private_data;
- seq->private = state;
-out:
- return rc;
-
-out_kfree:
- kfree(state);
- goto out;
+ return seq_open_net(inode, file, &arp_seq_ops,
+ sizeof(struct clip_seq_state));
}
-static struct file_operations arp_seq_fops = {
+static const struct file_operations arp_seq_fops = {
.open = arp_seq_open,
.read = seq_read,
.llseek = seq_lseek,
- .release = seq_release_private,
+ .release = seq_release_net,
.owner = THIS_MODULE
};
#endif
+static void atm_clip_exit_noproc(void);
+
static int __init atm_clip_init(void)
{
neigh_table_init_no_netlink(&clip_tbl);
{
struct proc_dir_entry *p;
- p = create_proc_entry("arp", S_IRUGO, atm_proc_root);
- if (p)
- p->proc_fops = &arp_seq_fops;
+ p = proc_create("arp", S_IRUGO, atm_proc_root, &arp_seq_fops);
+ if (!p) {
+ pr_err("Unable to initialize /proc/net/atm/arp\n");
+ atm_clip_exit_noproc();
+ return -ENOMEM;
+ }
}
#endif
return 0;
}
-static void __exit atm_clip_exit(void)
+static void atm_clip_exit_noproc(void)
{
struct net_device *dev, *next;
- remove_proc_entry("arp", atm_proc_root);
-
unregister_inetaddr_notifier(&clip_inet_notifier);
unregister_netdevice_notifier(&clip_dev_notifier);
clip_tbl_hook = NULL;
}
+static void __exit atm_clip_exit(void)
+{
+ remove_proc_entry("arp", atm_proc_root);
+
+ atm_clip_exit_noproc();
+}
+
module_init(atm_clip_init);
module_exit(atm_clip_exit);
MODULE_AUTHOR("Werner Almesberger");
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff