Release 4.11 net/atm/clip.c
/* net/atm/clip.c - RFC1577 Classical IP over ATM */
/* 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/module.h>
#include <linux/init.h>
#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/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/inetdevice.h>
#include <linux/bitops.h>
#include <linux/poison.h>
#include <linux/proc_fs.h>
#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 <net/arp.h>
#include <linux/param.h> /* for HZ */
#include <linux/uaccess.h>
#include <asm/byteorder.h> /* for htons etc. */
#include <linux/atomic.h>
#include "common.h"
#include "resources.h"
#include <net/atmclip.h>
static struct net_device *clip_devs;
static struct atm_vcc *atmarpd;
static struct timer_list idle_timer;
static const struct neigh_ops clip_neigh_ops;
static int to_atmarpd(enum atmarp_ctrl_type type, int itf, __be32 ip)
{
struct sock *sk;
struct atmarp_ctrl *ctrl;
struct sk_buff *skb;
pr_debug("(%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);
sk = sk_atm(atmarpd);
skb_queue_tail(&sk->sk_receive_queue, skb);
sk->sk_data_ready(sk);
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 119 | 84.40% | 1 | 11.11% |
Arnaldo Carvalho de Melo | 13 | 9.22% | 2 | 22.22% |
Chas Williams | 6 | 4.26% | 3 | 33.33% |
Stephen Hemminger | 1 | 0.71% | 1 | 11.11% |
Al Viro | 1 | 0.71% | 1 | 11.11% |
Joe Perches | 1 | 0.71% | 1 | 11.11% |
Total | 141 | 100.00% | 9 | 100.00% |
static void link_vcc(struct clip_vcc *clip_vcc, struct atmarp_entry *entry)
{
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;
entry->vccs = clip_vcc;
entry->neigh->used = jiffies;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 62 | 96.88% | 2 | 50.00% |
Joe Perches | 1 | 1.56% | 1 | 25.00% |
Stephen Hemminger | 1 | 1.56% | 1 | 25.00% |
Total | 64 | 100.00% | 4 | 100.00% |
static void unlink_clip_vcc(struct clip_vcc *clip_vcc)
{
struct atmarp_entry *entry = clip_vcc->entry;
struct clip_vcc **walk;
if (!entry) {
pr_crit("!clip_vcc->entry (clip_vcc %p)\n", clip_vcc);
return;
}
netif_tx_lock_bh(entry->neigh->dev); /* block clip_start_xmit() */
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)
goto out;
entry->expires = jiffies - 1;
/* force resolution or expiration */
error = neigh_update(entry->neigh, NULL, NUD_NONE,
NEIGH_UPDATE_F_ADMIN);
if (error)
pr_crit("neigh_update failed with %d\n", error);
goto out;
}
pr_crit("ATMARP: failed (entry %p, vcc 0x%p)\n", entry, clip_vcc);
out:
netif_tx_unlock_bh(entry->neigh->dev);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 157 | 83.07% | 2 | 33.33% |
Chas Williams | 25 | 13.23% | 1 | 16.67% |
Joe Perches | 4 | 2.12% | 1 | 16.67% |
Herbert Xu | 2 | 1.06% | 1 | 16.67% |
Hideaki Yoshifuji / 吉藤英明 | 1 | 0.53% | 1 | 16.67% |
Total | 189 | 100.00% | 6 | 100.00% |
/* The neighbour entry n->lock is held. */
static int neigh_check_cb(struct neighbour *n)
{
struct atmarp_entry *entry = neighbour_priv(n);
struct clip_vcc *cv;
if (n->ops != &clip_neigh_ops)
return 0;
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)) {
pr_debug("releasing vcc %p->%p of entry %p\n",
cv, cv->vcc, entry);
vcc_release_async(cv->vcc, -ETIMEDOUT);
}
}
if (entry->vccs || time_before(jiffies, entry->expires))
return 0;
if (atomic_read(&n->refcnt) > 1) {
struct sk_buff *skb;
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;
}
pr_debug("expired neigh %p\n", n);
return 1;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 135 | 71.05% | 1 | 16.67% |
David S. Miller | 39 | 20.53% | 2 | 33.33% |
Eric Dumazet | 12 | 6.32% | 1 | 16.67% |
Stephen Hemminger | 3 | 1.58% | 1 | 16.67% |
Chas Williams | 1 | 0.53% | 1 | 16.67% |
Total | 190 | 100.00% | 6 | 100.00% |
static void idle_timer_check(unsigned long dummy)
{
write_lock(&arp_tbl.lock);
__neigh_for_each_release(&arp_tbl, neigh_check_cb);
mod_timer(&idle_timer, jiffies + CLIP_CHECK_INTERVAL * HZ);
write_unlock(&arp_tbl.lock);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 23 | 50.00% | 1 | 25.00% |
David S. Miller | 15 | 32.61% | 1 | 25.00% |
Chas Williams | 5 | 10.87% | 1 | 25.00% |
Eric Dumazet | 3 | 6.52% | 1 | 25.00% |
Total | 46 | 100.00% | 4 | 100.00% |
static int clip_arp_rcv(struct sk_buff *skb)
{
struct atm_vcc *vcc;
pr_debug("\n");
vcc = ATM_SKB(skb)->vcc;
if (!vcc || !atm_charge(vcc, skb->truesize)) {
dev_kfree_skb_any(skb);
return 0;
}
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;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 85 | 95.51% | 2 | 50.00% |
Stephen Hemminger | 3 | 3.37% | 1 | 25.00% |
Joe Perches | 1 | 1.12% | 1 | 25.00% |
Total | 89 | 100.00% | 4 | 100.00% |
static const unsigned char llc_oui[] = {
0xaa, /* DSAP: non-ISO */
0xaa, /* SSAP: non-ISO */
0x03, /* Ctrl: Unnumbered Information Command PDU */
0x00, /* OUI: EtherType */
0x00,
0x00
};
static void clip_push(struct atm_vcc *vcc, struct sk_buff *skb)
{
struct clip_vcc *clip_vcc = CLIP_VCC(vcc);
pr_debug("\n");
if (!clip_devs) {
atm_return(vcc, skb->truesize);
kfree_skb(skb);
return;
}
if (!skb) {
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 */
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_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_pull(skb, RFC1483LLC_LEN);
if (skb->protocol == htons(ETH_P_ARP)) {
skb->dev->stats.rx_packets++;
skb->dev->stats.rx_bytes += skb->len;
clip_arp_rcv(skb);
return;
}
}
clip_vcc->last_use = jiffies;
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);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 256 | 84.77% | 3 | 30.00% |
Jorge Boncompte | 22 | 7.28% | 1 | 10.00% |
Chas Williams | 17 | 5.63% | 2 | 20.00% |
Arnaldo Carvalho de Melo | 3 | 0.99% | 1 | 10.00% |
Stephen Hemminger | 2 | 0.66% | 1 | 10.00% |
Joe Perches | 1 | 0.33% | 1 | 10.00% |
Al Viro | 1 | 0.33% | 1 | 10.00% |
Total | 302 | 100.00% | 10 | 100.00% |
/*
* 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;
pr_debug("(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);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 121 | 98.37% | 4 | 66.67% |
Joe Perches | 1 | 0.81% | 1 | 16.67% |
Stephen Hemminger | 1 | 0.81% | 1 | 16.67% |
Total | 123 | 100.00% | 6 | 100.00% |
static void clip_neigh_solicit(struct neighbour *neigh, struct sk_buff *skb)
{
__be32 *ip = (__be32 *) neigh->primary_key;
pr_debug("(neigh %p, skb %p)\n", neigh, skb);
to_atmarpd(act_need, PRIV(neigh->dev)->number, *ip);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 39 | 72.22% | 1 | 25.00% |
David S. Miller | 13 | 24.07% | 1 | 25.00% |
Joe Perches | 1 | 1.85% | 1 | 25.00% |
Stephen Hemminger | 1 | 1.85% | 1 | 25.00% |
Total | 54 | 100.00% | 4 | 100.00% |
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);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 37 | 100.00% | 1 | 100.00% |
Total | 37 | 100.00% | 1 | 100.00% |
static const struct neigh_ops clip_neigh_ops = {
.family = AF_INET,
.solicit = clip_neigh_solicit,
.error_report = clip_neigh_error,
.output = neigh_direct_output,
.connected_output = neigh_direct_output,
};
static int clip_constructor(struct net_device *dev, struct neighbour *neigh)
{
struct atmarp_entry *entry = neighbour_priv(neigh);
if (neigh->tbl->family != AF_INET)
return -EINVAL;
if (neigh->type != RTN_UNICAST)
return -EINVAL;
neigh->nud_state = NUD_NONE;
neigh->ops = &clip_neigh_ops;
neigh->output = neigh->ops->output;
entry->neigh = neigh;
entry->vccs = NULL;
entry->expires = jiffies - 1;
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 75 | 76.53% | 1 | 20.00% |
David S. Miller | 12 | 12.24% | 2 | 40.00% |
Herbert Xu | 6 | 6.12% | 1 | 20.00% |
Jiri Pirko | 5 | 5.10% | 1 | 20.00% |
Total | 98 | 100.00% | 5 | 100.00% |
/* @@@ 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.
*/
static int clip_encap(struct atm_vcc *vcc, int mode)
{
if (!CLIP_VCC(vcc))
return -EBADFD;
CLIP_VCC(vcc)->encap = mode;
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 25 | 65.79% | 1 | 33.33% |
Sasha Levin | 12 | 31.58% | 1 | 33.33% |
Chas Williams | 1 | 2.63% | 1 | 33.33% |
Total | 38 | 100.00% | 3 | 100.00% |
static netdev_tx_t clip_start_xmit(struct sk_buff *skb,
struct net_device *dev)
{
struct clip_priv *clip_priv = PRIV(dev);
struct dst_entry *dst = skb_dst(skb);
struct atmarp_entry *entry;
struct neighbour *n;
struct atm_vcc *vcc;
struct rtable *rt;
__be32 *daddr;
int old;
unsigned long flags;
pr_debug("(skb %p)\n", skb);
if (!dst) {
pr_err("skb_dst(skb) == NULL\n");
dev_kfree_skb(skb);
dev->stats.tx_dropped++;
return NETDEV_TX_OK;
}
rt = (struct rtable *) dst;
if (rt->rt_gateway)
daddr = &rt->rt_gateway;
else
daddr = &ip_hdr(skb)->daddr;
n = dst_neigh_lookup(dst, daddr);
if (!n) {
pr_err("NO NEIGHBOUR !\n");
dev_kfree_skb(skb);
dev->stats.tx_dropped++;
return NETDEV_TX_OK;
}
entry = neighbour_priv(n);
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, *((__be32 *)n->primary_key));
}
if (entry->neigh->arp_queue.qlen < ATMARP_MAX_UNRES_PACKETS)
skb_queue_tail(&entry->neigh->arp_queue, skb);
else {
dev_kfree_skb(skb);
dev->stats.tx_dropped++;
}
goto out_release_neigh;
}
pr_debug("neigh %p, vccs %p\n", entry, entry->vccs);
ATM_SKB(skb)->vcc = vcc = entry->vccs->vcc;
pr_debug("using neighbour %p, vcc %p\n", n, vcc);
if (entry->vccs->encap) {
void *here;
here = skb_push(skb, RFC1483LLC_LEN);
memcpy(here, llc_oui, sizeof(llc_oui));
((__be16 *) 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;
pr_debug("atm_skb(%p)->vcc(%p)->dev(%p)\n", skb, vcc, vcc->dev);
old = xchg(&entry->vccs->xoff, 1); /* assume XOFF ... */
if (old) {
pr_warn("XOFF->XOFF transition\n");
goto out_release_neigh;
}
dev->stats.tx_packets++;
dev->stats.tx_bytes += skb->len;
vcc->send(vcc, skb);
if (atm_may_send(vcc, 0)) {
entry->vccs->xoff = 0;
goto out_release_neigh;
}
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);
out_release_neigh:
neigh_release(n);
return NETDEV_TX_OK;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 415 | 77.14% | 6 | 30.00% |
David S. Miller | 96 | 17.84% | 3 | 15.00% |
Stephen Hemminger | 11 | 2.04% | 4 | 20.00% |
Joe Perches | 7 | 1.30% | 2 | 10.00% |
Arnaldo Carvalho de Melo | 4 | 0.74% | 2 | 10.00% |
Patrick McHardy | 3 | 0.56% | 1 | 5.00% |
Chas Williams | 1 | 0.19% | 1 | 5.00% |
Al Viro | 1 | 0.19% | 1 | 5.00% |
Total | 538 | 100.00% | 20 | 100.00% |
static int clip_mkip(struct atm_vcc *vcc, int timeout)
{
struct clip_vcc *clip_vcc;
if (!vcc->push)
return -EBADFD;
clip_vcc = kmalloc(sizeof(struct clip_vcc), GFP_KERNEL);
if (!clip_vcc)
return -ENOMEM;
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->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;
/* re-process everything received between connection setup and MKIP */
vcc_process_recv_queue(vcc);
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 137 | 90.13% | 3 | 33.33% |
Chas Williams | 11 | 7.24% | 2 | 22.22% |
Joe Perches | 1 | 0.66% | 1 | 11.11% |
David S. Miller | 1 | 0.66% | 1 | 11.11% |
Jorge Boncompte | 1 | 0.66% | 1 | 11.11% |
Stephen Hemminger | 1 | 0.66% | 1 | 11.11% |
Total | 152 | 100.00% | 9 | 100.00% |
static int clip_setentry(struct atm_vcc *vcc, __be32 ip)
{
struct neighbour *neigh;
struct atmarp_entry *entry;
int error;
struct clip_vcc *clip_vcc;
struct rtable *rt;
if (vcc->push != clip_push) {
pr_warn("non-CLIP VCC\n");
return -EBADF;
}
clip_vcc = CLIP_VCC(vcc);
if (!ip) {
if (!clip_vcc->entry) {
pr_err("hiding hidden ATMARP entry\n");
return 0;
}
pr_debug("remove\n");
unlink_clip_vcc(clip_vcc);
return 0;
}
rt = ip_route_output(&init_net, ip, 0, 1, 0);
if (IS_ERR(rt))
return PTR_ERR(rt);
neigh = __neigh_lookup(&arp_tbl, &ip, rt->dst.dev, 1);
ip_rt_put(rt);
if (!neigh)
return -ENOMEM;
entry = neighbour_priv(neigh);
if (entry != clip_vcc->entry) {
if (!clip_vcc->entry)
pr_debug("add\n");
else {
pr_debug("update\n");
unlink_clip_vcc(clip_vcc);
}
link_vcc(clip_vcc, entry);
}
error = neigh_update(neigh, llc_oui, NUD_PERMANENT,
NEIGH_UPDATE_F_OVERRIDE | NEIGH_UPDATE_F_ADMIN);
neigh_release(neigh);
return error;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 199 | 85.04% | 1 | 8.33% |
David S. Miller | 19 | 8.12% | 4 | 33.33% |
Joe Perches | 6 | 2.56% | 2 | 16.67% |
Hideaki Yoshifuji / 吉藤英明 | 3 | 1.28% | 1 | 8.33% |
Stephen Hemminger | 3 | 1.28% | 1 | 8.33% |
Denis V. Lunev | 2 | 0.85% | 1 | 8.33% |
Chas Williams | 1 | 0.43% | 1 | 8.33% |
Al Viro | 1 | 0.43% | 1 | 8.33% |
Total | 234 | 100.00% | 12 | 100.00% |
static const struct net_device_ops clip_netdev_ops = {
.ndo_start_xmit = clip_start_xmit,
.ndo_neigh_construct = clip_constructor,
};
static void clip_setup(struct net_device *dev)
{
dev->netdev_ops = &clip_netdev_ops;
dev->type = ARPHRD_ATM;
dev->neigh_priv_len = sizeof(struct atmarp_entry);
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. */
netif_keep_dst(dev);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 43 | 68.25% | 3 | 37.50% |
David S. Miller | 10 | 15.87% | 1 | 12.50% |
Eric Dumazet | 5 | 7.94% | 2 | 25.00% |
Stephen Hemminger | 3 | 4.76% | 1 | 12.50% |
Al Viro | 2 | 3.17% | 1 | 12.50% |
Total | 63 | 100.00% | 8 | 100.00% |
static 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 = alloc_netdev(sizeof(struct clip_priv), "", NET_NAME_UNKNOWN,
clip_setup);
if (!dev)
return -ENOMEM;
clip_priv = PRIV(dev);
sprintf(dev->name, "atm%d", number);
spin_lock_init(&clip_priv->xoff_lock);
clip_priv->number = number;
error = register_netdev(dev);
if (error) {
free_netdev(dev);
return error;
}
clip_priv->next = clip_devs;
clip_devs = dev;
pr_debug("registered (net:%s)\n", dev->name);
return number;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 201 | 95.71% | 2 | 33.33% |
Al Viro | 5 | 2.38% | 1 | 16.67% |
Tom Gundersen | 2 | 0.95% | 1 | 16.67% |
Stephen Hemminger | 1 | 0.48% | 1 | 16.67% |
Chas Williams | 1 | 0.48% | 1 | 16.67% |
Total | 210 | 100.00% | 6 | 100.00% |
static int clip_device_event(struct notifier_block *this, unsigned long event,
void *ptr)
{
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
if (!net_eq(dev_net(dev), &init_net))
return NOTIFY_DONE;
if (event == NETDEV_UNREGISTER)
return NOTIFY_DONE;
/* ignore non-CLIP devices */
if (dev->type != ARPHRD_ATM || dev->netdev_ops != &clip_netdev_ops)
return NOTIFY_DONE;
switch (event) {
case NETDEV_UP:
pr_debug("NETDEV_UP\n");
to_atmarpd(act_up, PRIV(dev)->number, 0);
break;
case NETDEV_GOING_DOWN:
pr_debug("NETDEV_DOWN\n");
to_atmarpd(act_down, PRIV(dev)->number, 0);
break;
case NETDEV_CHANGE:
case NETDEV_CHANGEMTU:
pr_debug("NETDEV_CHANGE*\n");
to_atmarpd(act_change, PRIV(dev)->number, 0);
break;
}
return NOTIFY_DONE;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 109 | 70.32% | 2 | 20.00% |
Stephen Hemminger | 21 | 13.55% | 3 | 30.00% |
Eric W. Biedermann | 9 | 5.81% | 1 | 10.00% |
Hideaki Yoshifuji / 吉藤英明 | 8 | 5.16% | 2 | 20.00% |
Jiri Pirko | 5 | 3.23% | 1 | 10.00% |
Joe Perches | 3 | 1.94% | 1 | 10.00% |
Total | 155 | 100.00% | 10 | 100.00% |
static int clip_inet_event(struct notifier_block *this, unsigned long event,
void *ifa)
{
struct in_device *in_dev;
struct netdev_notifier_info info;
in_dev = ((struct in_ifaddr *)ifa)->ifa_dev;
/*
* 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;
netdev_notifier_info_init(&info, in_dev->dev);
return clip_device_event(this, NETDEV_CHANGE, &info);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 56 | 77.78% | 1 | 50.00% |
Américo Wang | 16 | 22.22% | 1 | 50.00% |
Total | 72 | 100.00% | 2 | 100.00% |
static struct notifier_block clip_dev_notifier = {
.notifier_call = clip_device_event,
};
static struct notifier_block clip_inet_notifier = {
.notifier_call = clip_inet_event,
};
static void atmarpd_close(struct atm_vcc *vcc)
{
pr_debug("\n");
rtnl_lock();
atmarpd = NULL;
skb_queue_purge(&sk_atm(vcc)->sk_receive_queue);
rtnl_unlock();
pr_debug("(done)\n");
module_put(THIS_MODULE);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 27 | 57.45% | 1 | 11.11% |
Stephen Hemminger | 8 | 17.02% | 2 | 22.22% |
Chas Williams | 6 | 12.77% | 2 | 22.22% |
Arnaldo Carvalho de Melo | 4 | 8.51% | 2 | 22.22% |
Joe Perches | 1 | 2.13% | 1 | 11.11% |
Linus Torvalds | 1 | 2.13% | 1 | 11.11% |
Total | 47 | 100.00% | 9 | 100.00% |