#include <net/slhc_vj.h>
#include <asm/atomic.h>
+#include <linux/nsproxy.h>
+#include <net/net_namespace.h>
+#include <net/netns/generic.h>
+
#define PPP_VERSION "2.4.2"
/*
struct sock_filter *active_filter;/* filter for pkts to reset idle */
unsigned pass_len, active_len;
#endif /* CONFIG_PPP_FILTER */
+ struct net *ppp_net; /* the net we belong to */
};
/*
struct rw_semaphore chan_sem; /* protects `chan' during chan ioctl */
spinlock_t downl; /* protects `chan', file.xq dequeue */
struct ppp *ppp; /* ppp unit we're connected to */
+ struct net *chan_net; /* the net channel belongs to */
struct list_head clist; /* link in list of channels per unit */
rwlock_t upl; /* protects `ppp' */
#ifdef CONFIG_PPP_MULTILINK
u8 avail; /* flag used in multilink stuff */
u8 had_frag; /* >= 1 fragments have been sent */
u32 lastseq; /* MP: last sequence # received */
+ int speed; /* speed of the corresponding ppp channel*/
#endif /* CONFIG_PPP_MULTILINK */
};
* channel.downl.
*/
-/*
- * all_ppp_mutex protects the all_ppp_units mapping.
- * It also ensures that finding a ppp unit in the all_ppp_units map
- * and updating its file.refcnt field is atomic.
- */
-static DEFINE_MUTEX(all_ppp_mutex);
static atomic_t ppp_unit_count = ATOMIC_INIT(0);
-static DEFINE_IDR(ppp_units_idr);
-
-/*
- * all_channels_lock protects all_channels and last_channel_index,
- * and the atomicity of find a channel and updating its file.refcnt
- * field.
- */
-static DEFINE_SPINLOCK(all_channels_lock);
-static LIST_HEAD(all_channels);
-static LIST_HEAD(new_channels);
-static int last_channel_index;
static atomic_t channel_count = ATOMIC_INIT(0);
+/* per-net private data for this module */
+static int ppp_net_id;
+struct ppp_net {
+ /* units to ppp mapping */
+ struct idr units_idr;
+
+ /*
+ * all_ppp_mutex protects the units_idr mapping.
+ * It also ensures that finding a ppp unit in the units_idr
+ * map and updating its file.refcnt field is atomic.
+ */
+ struct mutex all_ppp_mutex;
+
+ /* channels */
+ struct list_head all_channels;
+ struct list_head new_channels;
+ int last_channel_index;
+
+ /*
+ * all_channels_lock protects all_channels and
+ * last_channel_index, and the atomicity of find
+ * a channel and updating its file.refcnt field.
+ */
+ spinlock_t all_channels_lock;
+};
+
/* Get the PPP protocol number from a skb */
#define PPP_PROTO(skb) (((skb)->data[0] << 8) + (skb)->data[1])
#define seq_after(a, b) ((s32)((a) - (b)) > 0)
/* Prototypes. */
-static int ppp_unattached_ioctl(struct ppp_file *pf, struct file *file,
- unsigned int cmd, unsigned long arg);
+static int ppp_unattached_ioctl(struct net *net, struct ppp_file *pf,
+ struct file *file, unsigned int cmd, unsigned long arg);
static void ppp_xmit_process(struct ppp *ppp);
static void ppp_send_frame(struct ppp *ppp, struct sk_buff *skb);
static void ppp_push(struct ppp *ppp);
static void ppp_ccp_closed(struct ppp *ppp);
static struct compressor *find_compressor(int type);
static void ppp_get_stats(struct ppp *ppp, struct ppp_stats *st);
-static struct ppp *ppp_create_interface(int unit, int *retp);
+static struct ppp *ppp_create_interface(struct net *net, int unit, int *retp);
static void init_ppp_file(struct ppp_file *pf, int kind);
static void ppp_shutdown_interface(struct ppp *ppp);
static void ppp_destroy_interface(struct ppp *ppp);
-static struct ppp *ppp_find_unit(int unit);
-static struct channel *ppp_find_channel(int unit);
+static struct ppp *ppp_find_unit(struct ppp_net *pn, int unit);
+static struct channel *ppp_find_channel(struct ppp_net *pn, int unit);
static int ppp_connect_channel(struct channel *pch, int unit);
static int ppp_disconnect_channel(struct channel *pch);
static void ppp_destroy_channel(struct channel *pch);
static struct class *ppp_class;
+/* per net-namespace data */
+static inline struct ppp_net *ppp_pernet(struct net *net)
+{
+ BUG_ON(!net);
+
+ return net_generic(net, ppp_net_id);
+}
+
/* Translates a PPP protocol number to a NP index (NP == network protocol) */
static inline int proto_to_npindex(int proto)
{
int __user *p = argp;
if (!pf)
- return ppp_unattached_ioctl(pf, file, cmd, arg);
+ return ppp_unattached_ioctl(current->nsproxy->net_ns,
+ pf, file, cmd, arg);
if (cmd == PPPIOCDETACH) {
/*
return err;
}
-static int ppp_unattached_ioctl(struct ppp_file *pf, struct file *file,
- unsigned int cmd, unsigned long arg)
+static int ppp_unattached_ioctl(struct net *net, struct ppp_file *pf,
+ struct file *file, unsigned int cmd, unsigned long arg)
{
int unit, err = -EFAULT;
struct ppp *ppp;
struct channel *chan;
+ struct ppp_net *pn;
int __user *p = (int __user *)arg;
lock_kernel();
/* Create a new ppp unit */
if (get_user(unit, p))
break;
- ppp = ppp_create_interface(unit, &err);
+ ppp = ppp_create_interface(net, unit, &err);
if (!ppp)
break;
file->private_data = &ppp->file;
/* Attach to an existing ppp unit */
if (get_user(unit, p))
break;
- mutex_lock(&all_ppp_mutex);
err = -ENXIO;
- ppp = ppp_find_unit(unit);
+ pn = ppp_pernet(net);
+ mutex_lock(&pn->all_ppp_mutex);
+ ppp = ppp_find_unit(pn, unit);
if (ppp) {
atomic_inc(&ppp->file.refcnt);
file->private_data = &ppp->file;
err = 0;
}
- mutex_unlock(&all_ppp_mutex);
+ mutex_unlock(&pn->all_ppp_mutex);
break;
case PPPIOCATTCHAN:
if (get_user(unit, p))
break;
- spin_lock_bh(&all_channels_lock);
err = -ENXIO;
- chan = ppp_find_channel(unit);
+ pn = ppp_pernet(net);
+ spin_lock_bh(&pn->all_channels_lock);
+ chan = ppp_find_channel(pn, unit);
if (chan) {
atomic_inc(&chan->file.refcnt);
file->private_data = &chan->file;
err = 0;
}
- spin_unlock_bh(&all_channels_lock);
+ spin_unlock_bh(&pn->all_channels_lock);
break;
default:
.release = ppp_release
};
+static __net_init int ppp_init_net(struct net *net)
+{
+ struct ppp_net *pn;
+ int err;
+
+ pn = kzalloc(sizeof(*pn), GFP_KERNEL);
+ if (!pn)
+ return -ENOMEM;
+
+ idr_init(&pn->units_idr);
+ mutex_init(&pn->all_ppp_mutex);
+
+ INIT_LIST_HEAD(&pn->all_channels);
+ INIT_LIST_HEAD(&pn->new_channels);
+
+ spin_lock_init(&pn->all_channels_lock);
+
+ err = net_assign_generic(net, ppp_net_id, pn);
+ if (err) {
+ kfree(pn);
+ return err;
+ }
+
+ return 0;
+}
+
+static __net_exit void ppp_exit_net(struct net *net)
+{
+ struct ppp_net *pn;
+
+ pn = net_generic(net, ppp_net_id);
+ idr_destroy(&pn->units_idr);
+ /*
+ * if someone has cached our net then
+ * further net_generic call will return NULL
+ */
+ net_assign_generic(net, ppp_net_id, NULL);
+ kfree(pn);
+}
+
+static struct pernet_operations ppp_net_ops = {
+ .init = ppp_init_net,
+ .exit = ppp_exit_net,
+};
+
#define PPP_MAJOR 108
/* Called at boot time if ppp is compiled into the kernel,
int err;
printk(KERN_INFO "PPP generic driver version " PPP_VERSION "\n");
- err = register_chrdev(PPP_MAJOR, "ppp", &ppp_device_fops);
- if (!err) {
- ppp_class = class_create(THIS_MODULE, "ppp");
- if (IS_ERR(ppp_class)) {
- err = PTR_ERR(ppp_class);
- goto out_chrdev;
- }
- device_create(ppp_class, NULL, MKDEV(PPP_MAJOR, 0), NULL,
- "ppp");
+
+ err = register_pernet_gen_device(&ppp_net_id, &ppp_net_ops);
+ if (err) {
+ printk(KERN_ERR "failed to register PPP pernet device (%d)\n", err);
+ goto out;
}
-out:
- if (err)
+ err = register_chrdev(PPP_MAJOR, "ppp", &ppp_device_fops);
+ if (err) {
printk(KERN_ERR "failed to register PPP device (%d)\n", err);
- return err;
+ goto out_net;
+ }
+
+ ppp_class = class_create(THIS_MODULE, "ppp");
+ if (IS_ERR(ppp_class)) {
+ err = PTR_ERR(ppp_class);
+ goto out_chrdev;
+ }
+
+ /* not a big deal if we fail here :-) */
+ device_create(ppp_class, NULL, MKDEV(PPP_MAJOR, 0), NULL, "ppp");
+
+ return 0;
out_chrdev:
unregister_chrdev(PPP_MAJOR, "ppp");
- goto out;
+out_net:
+ unregister_pernet_gen_device(ppp_net_id, &ppp_net_ops);
+out:
+ return err;
}
/*
outf:
kfree_skb(skb);
- ++ppp->dev->stats.tx_dropped;
+ ++dev->stats.tx_dropped;
return 0;
}
dev->tx_queue_len = 3;
dev->type = ARPHRD_PPP;
dev->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
+ dev->features |= NETIF_F_NETNS_LOCAL;
}
/*
return;
drop:
- if (skb)
- kfree_skb(skb);
+ kfree_skb(skb);
++ppp->dev->stats.tx_errors;
}
*/
static int ppp_mp_explode(struct ppp *ppp, struct sk_buff *skb)
{
- int len, fragsize;
- int i, bits, hdrlen, mtu;
- int flen;
- int navail, nfree;
- int nbigger;
+ int len, totlen;
+ int i, bits, hdrlen, mtu;
+ int flen;
+ int navail, nfree, nzero;
+ int nbigger;
+ int totspeed;
+ int totfree;
unsigned char *p, *q;
struct list_head *list;
struct channel *pch;
struct sk_buff *frag;
struct ppp_channel *chan;
- nfree = 0; /* # channels which have no packet already queued */
+ totspeed = 0; /*total bitrate of the bundle*/
+ nfree = 0; /* # channels which have no packet already queued */
navail = 0; /* total # of usable channels (not deregistered) */
+ nzero = 0; /* number of channels with zero speed associated*/
+ totfree = 0; /*total # of channels available and
+ *having no queued packets before
+ *starting the fragmentation*/
+
hdrlen = (ppp->flags & SC_MP_XSHORTSEQ)? MPHDRLEN_SSN: MPHDRLEN;
- i = 0;
- list_for_each_entry(pch, &ppp->channels, clist) {
+ i = 0;
+ list_for_each_entry(pch, &ppp->channels, clist) {
navail += pch->avail = (pch->chan != NULL);
- if (pch->avail) {
+ pch->speed = pch->chan->speed;
+ if (pch->avail) {
if (skb_queue_empty(&pch->file.xq) ||
- !pch->had_frag) {
- pch->avail = 2;
- ++nfree;
- }
- if (!pch->had_frag && i < ppp->nxchan)
- ppp->nxchan = i;
+ !pch->had_frag) {
+ if (pch->speed == 0)
+ nzero++;
+ else
+ totspeed += pch->speed;
+
+ pch->avail = 2;
+ ++nfree;
+ ++totfree;
+ }
+ if (!pch->had_frag && i < ppp->nxchan)
+ ppp->nxchan = i;
}
++i;
}
-
/*
- * Don't start sending this packet unless at least half of
- * the channels are free. This gives much better TCP
- * performance if we have a lot of channels.
+ * Don't start sending this packet unless at least half of
+ * the channels are free. This gives much better TCP
+ * performance if we have a lot of channels.
*/
- if (nfree == 0 || nfree < navail / 2)
- return 0; /* can't take now, leave it in xmit_pending */
+ if (nfree == 0 || nfree < navail / 2)
+ return 0; /* can't take now, leave it in xmit_pending */
/* Do protocol field compression (XXX this should be optional) */
- p = skb->data;
- len = skb->len;
+ p = skb->data;
+ len = skb->len;
if (*p == 0) {
++p;
--len;
}
- /*
- * Decide on fragment size.
- * We create a fragment for each free channel regardless of
- * how small they are (i.e. even 0 length) in order to minimize
- * the time that it will take to detect when a channel drops
- * a fragment.
- */
- fragsize = len;
- if (nfree > 1)
- fragsize = DIV_ROUND_UP(fragsize, nfree);
- /* nbigger channels get fragsize bytes, the rest get fragsize-1,
- except if nbigger==0, then they all get fragsize. */
- nbigger = len % nfree;
-
- /* skip to the channel after the one we last used
- and start at that one */
+ totlen = len;
+ nbigger = len % nfree;
+
+ /* skip to the channel after the one we last used
+ and start at that one */
list = &ppp->channels;
- for (i = 0; i < ppp->nxchan; ++i) {
+ for (i = 0; i < ppp->nxchan; ++i) {
list = list->next;
- if (list == &ppp->channels) {
- i = 0;
+ if (list == &ppp->channels) {
+ i = 0;
break;
}
}
- /* create a fragment for each channel */
+ /* create a fragment for each channel */
bits = B;
- while (nfree > 0 || len > 0) {
+ while (nfree > 0 && len > 0) {
list = list->next;
- if (list == &ppp->channels) {
- i = 0;
+ if (list == &ppp->channels) {
+ i = 0;
continue;
}
- pch = list_entry(list, struct channel, clist);
+ pch = list_entry(list, struct channel, clist);
++i;
if (!pch->avail)
continue;
/*
- * Skip this channel if it has a fragment pending already and
- * we haven't given a fragment to all of the free channels.
+ * Skip this channel if it has a fragment pending already and
+ * we haven't given a fragment to all of the free channels.
*/
if (pch->avail == 1) {
- if (nfree > 0)
+ if (nfree > 0)
continue;
} else {
- --nfree;
pch->avail = 1;
}
/* check the channel's mtu and whether it is still attached. */
spin_lock_bh(&pch->downl);
if (pch->chan == NULL) {
- /* can't use this channel, it's being deregistered */
+ /* can't use this channel, it's being deregistered */
+ if (pch->speed == 0)
+ nzero--;
+ else
+ totspeed -= pch->speed;
+
spin_unlock_bh(&pch->downl);
pch->avail = 0;
- if (--navail == 0)
+ totlen = len;
+ totfree--;
+ nfree--;
+ if (--navail == 0)
break;
continue;
}
/*
- * Create a fragment for this channel of
- * min(max(mtu+2-hdrlen, 4), fragsize, len) bytes.
- * If mtu+2-hdrlen < 4, that is a ridiculously small
- * MTU, so we use mtu = 2 + hdrlen.
+ *if the channel speed is not set divide
+ *the packet evenly among the free channels;
+ *otherwise divide it according to the speed
+ *of the channel we are going to transmit on
+ */
+ if (pch->speed == 0) {
+ flen = totlen/nfree ;
+ if (nbigger > 0) {
+ flen++;
+ nbigger--;
+ }
+ } else {
+ flen = (((totfree - nzero)*(totlen + hdrlen*totfree)) /
+ ((totspeed*totfree)/pch->speed)) - hdrlen;
+ if (nbigger > 0) {
+ flen += ((totfree - nzero)*pch->speed)/totspeed;
+ nbigger -= ((totfree - nzero)*pch->speed)/
+ totspeed;
+ }
+ }
+ nfree--;
+
+ /*
+ *check if we are on the last channel or
+ *we exceded the lenght of the data to
+ *fragment
*/
- if (fragsize > len)
- fragsize = len;
- flen = fragsize;
- mtu = pch->chan->mtu + 2 - hdrlen;
- if (mtu < 4)
- mtu = 4;
+ if ((nfree == 0) || (flen > len))
+ flen = len;
+ /*
+ *it is not worth to tx on slow channels:
+ *in that case from the resulting flen according to the
+ *above formula will be equal or less than zero.
+ *Skip the channel in this case
+ */
+ if (flen <= 0) {
+ pch->avail = 2;
+ spin_unlock_bh(&pch->downl);
+ continue;
+ }
+
+ mtu = pch->chan->mtu + 2 - hdrlen;
+ if (mtu < 4)
+ mtu = 4;
if (flen > mtu)
flen = mtu;
- if (flen == len && nfree == 0)
- bits |= E;
- frag = alloc_skb(flen + hdrlen + (flen == 0), GFP_ATOMIC);
+ if (flen == len)
+ bits |= E;
+ frag = alloc_skb(flen + hdrlen + (flen == 0), GFP_ATOMIC);
if (!frag)
goto noskb;
- q = skb_put(frag, flen + hdrlen);
+ q = skb_put(frag, flen + hdrlen);
- /* make the MP header */
+ /* make the MP header */
q[0] = PPP_MP >> 8;
q[1] = PPP_MP;
if (ppp->flags & SC_MP_XSHORTSEQ) {
- q[2] = bits + ((ppp->nxseq >> 8) & 0xf);
+ q[2] = bits + ((ppp->nxseq >> 8) & 0xf);
q[3] = ppp->nxseq;
} else {
q[2] = bits;
q[5] = ppp->nxseq;
}
- /*
- * Copy the data in.
- * Unfortunately there is a bug in older versions of
- * the Linux PPP multilink reconstruction code where it
- * drops 0-length fragments. Therefore we make sure the
- * fragment has at least one byte of data. Any bytes
- * we add in this situation will end up as padding on the
- * end of the reconstructed packet.
- */
- if (flen == 0)
- *skb_put(frag, 1) = 0;
- else
- memcpy(q + hdrlen, p, flen);
+ memcpy(q + hdrlen, p, flen);
/* try to send it down the channel */
chan = pch->chan;
- if (!skb_queue_empty(&pch->file.xq) ||
- !chan->ops->start_xmit(chan, frag))
+ if (!skb_queue_empty(&pch->file.xq) ||
+ !chan->ops->start_xmit(chan, frag))
skb_queue_tail(&pch->file.xq, frag);
- pch->had_frag = 1;
+ pch->had_frag = 1;
p += flen;
- len -= flen;
+ len -= flen;
++ppp->nxseq;
bits = 0;
spin_unlock_bh(&pch->downl);
-
- if (--nbigger == 0 && fragsize > 0)
- --fragsize;
}
- ppp->nxchan = i;
+ ppp->nxchan = i;
return 1;
noskb:
spin_unlock_bh(&pch->downl);
if (ppp->debug & 1)
- printk(KERN_ERR "PPP: no memory (fragment)\n");
+ printk(KERN_ERR "PPP: no memory (fragment)\n");
++ppp->dev->stats.tx_errors;
++ppp->nxseq;
return 1; /* abandon the frame */
* Channel interface.
*/
-/*
- * Create a new, unattached ppp channel.
- */
-int
-ppp_register_channel(struct ppp_channel *chan)
+/* Create a new, unattached ppp channel. */
+int ppp_register_channel(struct ppp_channel *chan)
+{
+ return ppp_register_net_channel(current->nsproxy->net_ns, chan);
+}
+
+/* Create a new, unattached ppp channel for specified net. */
+int ppp_register_net_channel(struct net *net, struct ppp_channel *chan)
{
struct channel *pch;
+ struct ppp_net *pn;
pch = kzalloc(sizeof(struct channel), GFP_KERNEL);
if (!pch)
return -ENOMEM;
+
+ pn = ppp_pernet(net);
+
pch->ppp = NULL;
pch->chan = chan;
+ pch->chan_net = net;
chan->ppp = pch;
init_ppp_file(&pch->file, CHANNEL);
pch->file.hdrlen = chan->hdrlen;
init_rwsem(&pch->chan_sem);
spin_lock_init(&pch->downl);
rwlock_init(&pch->upl);
- spin_lock_bh(&all_channels_lock);
- pch->file.index = ++last_channel_index;
- list_add(&pch->list, &new_channels);
+
+ spin_lock_bh(&pn->all_channels_lock);
+ pch->file.index = ++pn->last_channel_index;
+ list_add(&pch->list, &pn->new_channels);
atomic_inc(&channel_count);
- spin_unlock_bh(&all_channels_lock);
+ spin_unlock_bh(&pn->all_channels_lock);
+
return 0;
}
ppp_unregister_channel(struct ppp_channel *chan)
{
struct channel *pch = chan->ppp;
+ struct ppp_net *pn;
if (!pch)
return; /* should never happen */
+
chan->ppp = NULL;
/*
spin_unlock_bh(&pch->downl);
up_write(&pch->chan_sem);
ppp_disconnect_channel(pch);
- spin_lock_bh(&all_channels_lock);
+
+ pn = ppp_pernet(pch->chan_net);
+ spin_lock_bh(&pn->all_channels_lock);
list_del(&pch->list);
- spin_unlock_bh(&all_channels_lock);
+ spin_unlock_bh(&pn->all_channels_lock);
+
pch->file.dead = 1;
wake_up_interruptible(&pch->file.rwait);
if (atomic_dec_and_test(&pch->file.refcnt))
* unit == -1 means allocate a new number.
*/
static struct ppp *
-ppp_create_interface(int unit, int *retp)
+ppp_create_interface(struct net *net, int unit, int *retp)
{
struct ppp *ppp;
+ struct ppp_net *pn;
struct net_device *dev = NULL;
int ret = -ENOMEM;
int i;
if (!dev)
goto out1;
+ pn = ppp_pernet(net);
+
ppp = netdev_priv(dev);
ppp->dev = dev;
ppp->mru = PPP_MRU;
skb_queue_head_init(&ppp->mrq);
#endif /* CONFIG_PPP_MULTILINK */
+ /*
+ * drum roll: don't forget to set
+ * the net device is belong to
+ */
+ dev_net_set(dev, net);
+
ret = -EEXIST;
- mutex_lock(&all_ppp_mutex);
+ mutex_lock(&pn->all_ppp_mutex);
if (unit < 0) {
- unit = unit_get(&ppp_units_idr, ppp);
+ unit = unit_get(&pn->units_idr, ppp);
if (unit < 0) {
*retp = unit;
goto out2;
}
} else {
- if (unit_find(&ppp_units_idr, unit))
+ if (unit_find(&pn->units_idr, unit))
goto out2; /* unit already exists */
/*
* if caller need a specified unit number
* fair but at least pppd will ask us to allocate
* new unit in this case so user is happy :)
*/
- unit = unit_set(&ppp_units_idr, ppp, unit);
+ unit = unit_set(&pn->units_idr, ppp, unit);
if (unit < 0)
goto out2;
}
ret = register_netdev(dev);
if (ret != 0) {
- unit_put(&ppp_units_idr, unit);
+ unit_put(&pn->units_idr, unit);
printk(KERN_ERR "PPP: couldn't register device %s (%d)\n",
dev->name, ret);
goto out2;
}
+ ppp->ppp_net = net;
+
atomic_inc(&ppp_unit_count);
- mutex_unlock(&all_ppp_mutex);
+ mutex_unlock(&pn->all_ppp_mutex);
*retp = 0;
return ppp;
out2:
- mutex_unlock(&all_ppp_mutex);
+ mutex_unlock(&pn->all_ppp_mutex);
free_netdev(dev);
out1:
*retp = ret;
*/
static void ppp_shutdown_interface(struct ppp *ppp)
{
- mutex_lock(&all_ppp_mutex);
+ struct ppp_net *pn;
+
+ pn = ppp_pernet(ppp->ppp_net);
+ mutex_lock(&pn->all_ppp_mutex);
+
/* This will call dev_close() for us. */
ppp_lock(ppp);
if (!ppp->closing) {
} else
ppp_unlock(ppp);
- unit_put(&ppp_units_idr, ppp->file.index);
+ unit_put(&pn->units_idr, ppp->file.index);
ppp->file.dead = 1;
ppp->owner = NULL;
wake_up_interruptible(&ppp->file.rwait);
- mutex_unlock(&all_ppp_mutex);
+
+ mutex_unlock(&pn->all_ppp_mutex);
}
/*
ppp->active_filter = NULL;
#endif /* CONFIG_PPP_FILTER */
- if (ppp->xmit_pending)
- kfree_skb(ppp->xmit_pending);
+ kfree_skb(ppp->xmit_pending);
free_netdev(ppp->dev);
}
* The caller should have locked the all_ppp_mutex.
*/
static struct ppp *
-ppp_find_unit(int unit)
+ppp_find_unit(struct ppp_net *pn, int unit)
{
- return unit_find(&ppp_units_idr, unit);
+ return unit_find(&pn->units_idr, unit);
}
/*
* when we have a lot of channels in use.
*/
static struct channel *
-ppp_find_channel(int unit)
+ppp_find_channel(struct ppp_net *pn, int unit)
{
struct channel *pch;
- list_for_each_entry(pch, &new_channels, list) {
+ list_for_each_entry(pch, &pn->new_channels, list) {
if (pch->file.index == unit) {
- list_move(&pch->list, &all_channels);
+ list_move(&pch->list, &pn->all_channels);
return pch;
}
}
- list_for_each_entry(pch, &all_channels, list) {
+
+ list_for_each_entry(pch, &pn->all_channels, list) {
if (pch->file.index == unit)
return pch;
}
+
return NULL;
}
ppp_connect_channel(struct channel *pch, int unit)
{
struct ppp *ppp;
+ struct ppp_net *pn;
int ret = -ENXIO;
int hdrlen;
- mutex_lock(&all_ppp_mutex);
- ppp = ppp_find_unit(unit);
+ pn = ppp_pernet(pch->chan_net);
+
+ mutex_lock(&pn->all_ppp_mutex);
+ ppp = ppp_find_unit(pn, unit);
if (!ppp)
goto out;
write_lock_bh(&pch->upl);
outl:
write_unlock_bh(&pch->upl);
out:
- mutex_unlock(&all_ppp_mutex);
+ mutex_unlock(&pn->all_ppp_mutex);
return ret;
}
unregister_chrdev(PPP_MAJOR, "ppp");
device_destroy(ppp_class, MKDEV(PPP_MAJOR, 0));
class_destroy(ppp_class);
- idr_destroy(&ppp_units_idr);
+ unregister_pernet_gen_device(ppp_net_id, &ppp_net_ops);
}
/*
module_init(ppp_init);
module_exit(ppp_cleanup);
+EXPORT_SYMBOL(ppp_register_net_channel);
EXPORT_SYMBOL(ppp_register_channel);
EXPORT_SYMBOL(ppp_unregister_channel);
EXPORT_SYMBOL(ppp_channel_index);
git.openpandora.org / pandora-kernel.git / blobdiff