#include <net/dst.h>
#include <net/pkt_sched.h>
#include <net/checksum.h>
+#include <net/xfrm.h>
#include <linux/highmem.h>
#include <linux/init.h>
#include <linux/kmod.h>
free_page((unsigned long) inuse);
}
- snprintf(buf, IFNAMSIZ, name, i);
+ if (buf != name)
+ snprintf(buf, IFNAMSIZ, name, i);
if (!__dev_get_by_name(net, buf))
return i;
}
EXPORT_SYMBOL(dev_alloc_name);
+static int dev_get_valid_name(struct net *net, const char *name, char *buf,
+ bool fmt)
+{
+ if (!dev_valid_name(name))
+ return -EINVAL;
+
+ if (fmt && strchr(name, '%'))
+ return __dev_alloc_name(net, name, buf);
+ else if (__dev_get_by_name(net, name))
+ return -EEXIST;
+ else if (buf != name)
+ strlcpy(buf, name, IFNAMSIZ);
+
+ return 0;
+}
/**
* dev_change_name - change name of a device
if (dev->flags & IFF_UP)
return -EBUSY;
- if (!dev_valid_name(newname))
- return -EINVAL;
-
if (strncmp(newname, dev->name, IFNAMSIZ) == 0)
return 0;
memcpy(oldname, dev->name, IFNAMSIZ);
- if (strchr(newname, '%')) {
- err = dev_alloc_name(dev, newname);
- if (err < 0)
- return err;
- } else if (__dev_get_by_name(net, newname))
- return -EEXIST;
- else
- strlcpy(dev->name, newname, IFNAMSIZ);
+ err = dev_get_valid_name(net, newname, dev->name, 1);
+ if (err < 0)
+ return err;
rollback:
/* For now only devices in the initial network namespace
* are in sysfs.
*/
- if (net == &init_net) {
+ if (net_eq(net, &init_net)) {
ret = device_rename(&dev->dev, dev->name);
if (ret) {
memcpy(dev->name, oldname, IFNAMSIZ);
nb->notifier_call(nb, NETDEV_DOWN, dev);
}
nb->notifier_call(nb, NETDEV_UNREGISTER, dev);
+ nb->notifier_call(nb, NETDEV_UNREGISTER_BATCH, dev);
}
}
skb->tstamp.tv64 = 0;
}
+/**
+ * dev_forward_skb - loopback an skb to another netif
+ *
+ * @dev: destination network device
+ * @skb: buffer to forward
+ *
+ * return values:
+ * NET_RX_SUCCESS (no congestion)
+ * NET_RX_DROP (packet was dropped)
+ *
+ * dev_forward_skb can be used for injecting an skb from the
+ * start_xmit function of one device into the receive queue
+ * of another device.
+ *
+ * The receiving device may be in another namespace, so
+ * we have to clear all information in the skb that could
+ * impact namespace isolation.
+ */
+int dev_forward_skb(struct net_device *dev, struct sk_buff *skb)
+{
+ skb_orphan(skb);
+
+ if (!(dev->flags & IFF_UP))
+ return NET_RX_DROP;
+
+ if (skb->len > (dev->mtu + dev->hard_header_len))
+ return NET_RX_DROP;
+
+ skb_dst_drop(skb);
+ skb->tstamp.tv64 = 0;
+ skb->pkt_type = PACKET_HOST;
+ skb->protocol = eth_type_trans(skb, dev);
+ skb->mark = 0;
+ secpath_reset(skb);
+ nf_reset(skb);
+ return netif_rx(skb);
+}
+EXPORT_SYMBOL_GPL(dev_forward_skb);
+
/*
* Support routine. Sends outgoing frames to any network
* taps currently in use.
if (MAX_RED_LOOP < ttl++) {
printk(KERN_WARNING
"Redir loop detected Dropping packet (%d->%d)\n",
- skb->iif, dev->ifindex);
+ skb->skb_iif, dev->ifindex);
return TC_ACT_SHOT;
}
if (netpoll_receive_skb(skb))
return NET_RX_DROP;
- if (!skb->iif)
- skb->iif = skb->dev->ifindex;
+ if (!skb->skb_iif)
+ skb->skb_iif = skb->dev->ifindex;
null_or_orig = NULL;
orig_dev = skb->dev;
return GRO_NORMAL;
for (p = napi->gro_list; p; p = p->next) {
- NAPI_GRO_CB(p)->same_flow = (p->dev == skb->dev)
- && !compare_ether_header(skb_mac_header(p),
- skb_gro_mac_header(skb));
+ NAPI_GRO_CB(p)->same_flow =
+ (p->dev == skb->dev) &&
+ !compare_ether_header(skb_mac_header(p),
+ skb_gro_mac_header(skb));
NAPI_GRO_CB(p)->flush = 0;
}
netdev_unregister_kobject(dev);
}
+ /* Process any work delayed until the end of the batch */
+ dev = list_entry(head->next, struct net_device, unreg_list);
+ call_netdevice_notifiers(NETDEV_UNREGISTER_BATCH, dev);
+
synchronize_net();
list_for_each_entry(dev, head, unreg_list)
EXPORT_SYMBOL(netdev_fix_features);
/**
+ * netif_stacked_transfer_operstate - transfer operstate
+ * @rootdev: the root or lower level device to transfer state from
+ * @dev: the device to transfer operstate to
+ *
+ * Transfer operational state from root to device. This is normally
+ * called when a stacking relationship exists between the root
+ * device and the device(a leaf device).
+ */
+void netif_stacked_transfer_operstate(const struct net_device *rootdev,
+ struct net_device *dev)
+{
+ if (rootdev->operstate == IF_OPER_DORMANT)
+ netif_dormant_on(dev);
+ else
+ netif_dormant_off(dev);
+
+ if (netif_carrier_ok(rootdev)) {
+ if (!netif_carrier_ok(dev))
+ netif_carrier_on(dev);
+ } else {
+ if (netif_carrier_ok(dev))
+ netif_carrier_off(dev);
+ }
+}
+EXPORT_SYMBOL(netif_stacked_transfer_operstate);
+
+/**
* register_netdevice - register a network device
* @dev: device to register
*
int register_netdevice(struct net_device *dev)
{
- struct hlist_head *head;
- struct hlist_node *p;
int ret;
struct net *net = dev_net(dev);
}
}
- if (!dev_valid_name(dev->name)) {
- ret = -EINVAL;
+ ret = dev_get_valid_name(net, dev->name, dev->name, 0);
+ if (ret)
goto err_uninit;
- }
dev->ifindex = dev_new_index(net);
if (dev->iflink == -1)
dev->iflink = dev->ifindex;
- /* Check for existence of name */
- head = dev_name_hash(net, dev->name);
- hlist_for_each(p, head) {
- struct net_device *d
- = hlist_entry(p, struct net_device, name_hlist);
- if (!strncmp(d->name, dev->name, IFNAMSIZ)) {
- ret = -EEXIST;
- goto err_uninit;
- }
- }
-
/* Fix illegal checksum combinations */
if ((dev->features & NETIF_F_HW_CSUM) &&
(dev->features & (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM))) {
{
unsigned long rebroadcast_time, warning_time;
+ linkwatch_forget_dev(dev);
+
rebroadcast_time = warning_time = jiffies;
while (atomic_read(&dev->refcnt) != 0) {
if (time_after(jiffies, rebroadcast_time + 1 * HZ)) {
/* Rebroadcast unregister notification */
call_netdevice_notifiers(NETDEV_UNREGISTER, dev);
+ /* don't resend NETDEV_UNREGISTER_BATCH, _BATCH users
+ * should have already handle it the first time */
if (test_bit(__LINK_STATE_LINKWATCH_PENDING,
&dev->state)) {
INIT_LIST_HEAD(&dev->napi_list);
INIT_LIST_HEAD(&dev->unreg_list);
+ INIT_LIST_HEAD(&dev->link_watch_list);
dev->priv_flags = IFF_XMIT_DST_RELEASE;
setup(dev);
strcpy(dev->name, name);
* unregister_netdevice_queue - remove device from the kernel
* @dev: device
* @head: list
-
+ *
* This function shuts down a device interface and removes it
* from the kernel tables.
* If head not NULL, device is queued to be unregistered later.
/**
* unregister_netdevice_many - unregister many devices
* @head: list of devices
- *
*/
void unregister_netdevice_many(struct list_head *head)
{
int dev_change_net_namespace(struct net_device *dev, struct net *net, const char *pat)
{
- char buf[IFNAMSIZ];
- const char *destname;
int err;
ASSERT_RTNL();
* we can use it in the destination network namespace.
*/
err = -EEXIST;
- destname = dev->name;
- if (__dev_get_by_name(net, destname)) {
+ if (__dev_get_by_name(net, dev->name)) {
/* We get here if we can't use the current device name */
if (!pat)
goto out;
- if (!dev_valid_name(pat))
- goto out;
- if (strchr(pat, '%')) {
- if (__dev_alloc_name(net, pat, buf) < 0)
- goto out;
- destname = buf;
- } else
- destname = pat;
- if (__dev_get_by_name(net, destname))
+ if (dev_get_valid_name(net, pat, dev->name, 1))
goto out;
}
this device. They should clean all the things.
*/
call_netdevice_notifiers(NETDEV_UNREGISTER, dev);
+ call_netdevice_notifiers(NETDEV_UNREGISTER_BATCH, dev);
/*
* Flush the unicast and multicast chains
/* Actually switch the network namespace */
dev_net_set(dev, net);
- /* Assign the new device name */
- if (destname != dev->name)
- strcpy(dev->name, destname);
-
/* If there is an ifindex conflict assign a new one */
if (__dev_get_by_index(net, dev->ifindex)) {
int iflink = (dev->iflink == dev->ifindex);
static void __net_exit default_device_exit(struct net *net)
{
- struct net_device *dev;
+ struct net_device *dev, *aux;
/*
- * Push all migratable of the network devices back to the
+ * Push all migratable network devices back to the
* initial network namespace
*/
rtnl_lock();
-restart:
- for_each_netdev(net, dev) {
+ for_each_netdev_safe(net, dev, aux) {
int err;
char fb_name[IFNAMSIZ];
if (dev->features & NETIF_F_NETNS_LOCAL)
continue;
- /* Delete virtual devices */
- if (dev->rtnl_link_ops && dev->rtnl_link_ops->dellink) {
- dev->rtnl_link_ops->dellink(dev, NULL);
- goto restart;
- }
+ /* Leave virtual devices for the generic cleanup */
+ if (dev->rtnl_link_ops)
+ continue;
/* Push remaing network devices to init_net */
snprintf(fb_name, IFNAMSIZ, "dev%d", dev->ifindex);
__func__, dev->name, err);
BUG();
}
- goto restart;
}
rtnl_unlock();
}
+static void __net_exit default_device_exit_batch(struct list_head *net_list)
+{
+ /* At exit all network devices most be removed from a network
+ * namespace. Do this in the reverse order of registeration.
+ * Do this across as many network namespaces as possible to
+ * improve batching efficiency.
+ */
+ struct net_device *dev;
+ struct net *net;
+ LIST_HEAD(dev_kill_list);
+
+ rtnl_lock();
+ list_for_each_entry(net, net_list, exit_list) {
+ for_each_netdev_reverse(net, dev) {
+ if (dev->rtnl_link_ops)
+ dev->rtnl_link_ops->dellink(dev, &dev_kill_list);
+ else
+ unregister_netdevice_queue(dev, &dev_kill_list);
+ }
+ }
+ unregister_netdevice_many(&dev_kill_list);
+ rtnl_unlock();
+}
+
static struct pernet_operations __net_initdata default_device_ops = {
.exit = default_device_exit,
+ .exit_batch = default_device_exit_batch,
};
/*
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff