#include <linux/etherdevice.h>
#include <linux/notifier.h>
#include <linux/skbuff.h>
+#include <net/net_namespace.h>
#include <net/sock.h>
#include <linux/rtnetlink.h>
#include <linux/proc_fs.h>
* unregister_netdevice(), which must be called with the rtnl
* semaphore held.
*/
-LIST_HEAD(dev_base_head);
DEFINE_RWLOCK(dev_base_lock);
-EXPORT_SYMBOL(dev_base_head);
EXPORT_SYMBOL(dev_base_lock);
#define NETDEV_HASHBITS 8
-static struct hlist_head dev_name_head[1<<NETDEV_HASHBITS];
-static struct hlist_head dev_index_head[1<<NETDEV_HASHBITS];
+#define NETDEV_HASHENTRIES (1 << NETDEV_HASHBITS)
-static inline struct hlist_head *dev_name_hash(const char *name)
+static inline struct hlist_head *dev_name_hash(struct net *net, const char *name)
{
unsigned hash = full_name_hash(name, strnlen(name, IFNAMSIZ));
- return &dev_name_head[hash & ((1<<NETDEV_HASHBITS)-1)];
+ return &net->dev_name_head[hash & ((1 << NETDEV_HASHBITS) - 1)];
}
-static inline struct hlist_head *dev_index_hash(int ifindex)
+static inline struct hlist_head *dev_index_hash(struct net *net, int ifindex)
{
- return &dev_index_head[ifindex & ((1<<NETDEV_HASHBITS)-1)];
+ return &net->dev_index_head[ifindex & ((1 << NETDEV_HASHBITS) - 1)];
}
/*
* Device drivers call our routines to queue packets here. We empty the
* queue in the local softnet handler.
*/
-DEFINE_PER_CPU(struct softnet_data, softnet_data) = { NULL };
+
+DEFINE_PER_CPU(struct softnet_data, softnet_data);
#ifdef CONFIG_SYSFS
extern int netdev_sysfs_init(void);
* If device already registered then return base of 1
* to indicate not to probe for this interface
*/
- if (__dev_get_by_name(name))
+ if (__dev_get_by_name(&init_net, name))
return 1;
for (i = 0; i < NETDEV_BOOT_SETUP_MAX; i++)
* careful with locks.
*/
-struct net_device *__dev_get_by_name(const char *name)
+struct net_device *__dev_get_by_name(struct net *net, const char *name)
{
struct hlist_node *p;
- hlist_for_each(p, dev_name_hash(name)) {
+ hlist_for_each(p, dev_name_hash(net, name)) {
struct net_device *dev
= hlist_entry(p, struct net_device, name_hlist);
if (!strncmp(dev->name, name, IFNAMSIZ))
* matching device is found.
*/
-struct net_device *dev_get_by_name(const char *name)
+struct net_device *dev_get_by_name(struct net *net, const char *name)
{
struct net_device *dev;
read_lock(&dev_base_lock);
- dev = __dev_get_by_name(name);
+ dev = __dev_get_by_name(net, name);
if (dev)
dev_hold(dev);
read_unlock(&dev_base_lock);
* or @dev_base_lock.
*/
-struct net_device *__dev_get_by_index(int ifindex)
+struct net_device *__dev_get_by_index(struct net *net, int ifindex)
{
struct hlist_node *p;
- hlist_for_each(p, dev_index_hash(ifindex)) {
+ hlist_for_each(p, dev_index_hash(net, ifindex)) {
struct net_device *dev
= hlist_entry(p, struct net_device, index_hlist);
if (dev->ifindex == ifindex)
* dev_put to indicate they have finished with it.
*/
-struct net_device *dev_get_by_index(int ifindex)
+struct net_device *dev_get_by_index(struct net *net, int ifindex)
{
struct net_device *dev;
read_lock(&dev_base_lock);
- dev = __dev_get_by_index(ifindex);
+ dev = __dev_get_by_index(net, ifindex);
if (dev)
dev_hold(dev);
read_unlock(&dev_base_lock);
* If the API was consistent this would be __dev_get_by_hwaddr
*/
-struct net_device *dev_getbyhwaddr(unsigned short type, char *ha)
+struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *ha)
{
struct net_device *dev;
ASSERT_RTNL();
- for_each_netdev(dev)
+ for_each_netdev(&init_net, dev)
if (dev->type == type &&
!memcmp(dev->dev_addr, ha, dev->addr_len))
return dev;
EXPORT_SYMBOL(dev_getbyhwaddr);
-struct net_device *__dev_getfirstbyhwtype(unsigned short type)
+struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type)
{
struct net_device *dev;
ASSERT_RTNL();
- for_each_netdev(dev)
+ for_each_netdev(net, dev)
if (dev->type == type)
return dev;
EXPORT_SYMBOL(__dev_getfirstbyhwtype);
-struct net_device *dev_getfirstbyhwtype(unsigned short type)
+struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type)
{
struct net_device *dev;
rtnl_lock();
- dev = __dev_getfirstbyhwtype(type);
+ dev = __dev_getfirstbyhwtype(net, type);
if (dev)
dev_hold(dev);
rtnl_unlock();
* dev_put to indicate they have finished with it.
*/
-struct net_device * dev_get_by_flags(unsigned short if_flags, unsigned short mask)
+struct net_device * dev_get_by_flags(struct net *net, unsigned short if_flags, unsigned short mask)
{
struct net_device *dev, *ret;
ret = NULL;
read_lock(&dev_base_lock);
- for_each_netdev(dev) {
+ for_each_netdev(net, dev) {
if (((dev->flags ^ if_flags) & mask) == 0) {
dev_hold(dev);
ret = dev;
const int max_netdevices = 8*PAGE_SIZE;
long *inuse;
struct net_device *d;
+ struct net *net;
+
+ BUG_ON(!dev->nd_net);
+ net = dev->nd_net;
p = strnchr(name, IFNAMSIZ-1, '%');
if (p) {
if (!inuse)
return -ENOMEM;
- for_each_netdev(d) {
+ for_each_netdev(net, d) {
if (!sscanf(d->name, name, &i))
continue;
if (i < 0 || i >= max_netdevices)
}
snprintf(buf, sizeof(buf), name, i);
- if (!__dev_get_by_name(buf)) {
+ if (!__dev_get_by_name(net, buf)) {
strlcpy(dev->name, buf, IFNAMSIZ);
return i;
}
*/
int dev_change_name(struct net_device *dev, char *newname)
{
+ char oldname[IFNAMSIZ];
int err = 0;
+ int ret;
+ struct net *net;
ASSERT_RTNL();
+ BUG_ON(!dev->nd_net);
+ net = dev->nd_net;
if (dev->flags & IFF_UP)
return -EBUSY;
if (!dev_valid_name(newname))
return -EINVAL;
+ memcpy(oldname, dev->name, IFNAMSIZ);
+
if (strchr(newname, '%')) {
err = dev_alloc_name(dev, newname);
if (err < 0)
return err;
strcpy(newname, dev->name);
}
- else if (__dev_get_by_name(newname))
+ else if (__dev_get_by_name(net, newname))
return -EEXIST;
else
strlcpy(dev->name, newname, IFNAMSIZ);
+rollback:
device_rename(&dev->dev, dev->name);
+
+ write_lock_bh(&dev_base_lock);
hlist_del(&dev->name_hlist);
- hlist_add_head(&dev->name_hlist, dev_name_hash(dev->name));
- raw_notifier_call_chain(&netdev_chain, NETDEV_CHANGENAME, dev);
+ hlist_add_head(&dev->name_hlist, dev_name_hash(net, dev->name));
+ write_unlock_bh(&dev_base_lock);
+
+ ret = raw_notifier_call_chain(&netdev_chain, NETDEV_CHANGENAME, dev);
+ ret = notifier_to_errno(ret);
+
+ if (ret) {
+ if (err) {
+ printk(KERN_ERR
+ "%s: name change rollback failed: %d.\n",
+ dev->name, ret);
+ } else {
+ err = ret;
+ memcpy(dev->name, oldname, IFNAMSIZ);
+ goto rollback;
+ }
+ }
return err;
}
* available in this kernel then it becomes a nop.
*/
-void dev_load(const char *name)
+void dev_load(struct net *net, const char *name)
{
struct net_device *dev;
read_lock(&dev_base_lock);
- dev = __dev_get_by_name(name);
+ dev = __dev_get_by_name(net, name);
read_unlock(&dev_base_lock);
if (!dev && capable(CAP_SYS_MODULE))
clear_bit(__LINK_STATE_START, &dev->state);
/* Synchronize to scheduled poll. We cannot touch poll list,
- * it can be even on different cpu. So just clear netif_running(),
- * and wait when poll really will happen. Actually, the best place
- * for this is inside dev->stop() after device stopped its irq
- * engine, but this requires more changes in devices. */
-
+ * it can be even on different cpu. So just clear netif_running().
+ *
+ * dev->stop() will invoke napi_disable() on all of it's
+ * napi_struct instances on this device.
+ */
smp_mb__after_clear_bit(); /* Commit netif_running(). */
- while (test_bit(__LINK_STATE_RX_SCHED, &dev->state)) {
- /* No hurry. */
- msleep(1);
- }
/*
* Call the device specific close. This cannot fail.
}
+static int dev_boot_phase = 1;
+
/*
* Device change register/unregister. These are not inline or static
* as we export them to the world.
int register_netdevice_notifier(struct notifier_block *nb)
{
struct net_device *dev;
+ struct net_device *last;
+ struct net *net;
int err;
rtnl_lock();
err = raw_notifier_chain_register(&netdev_chain, nb);
- if (!err) {
- for_each_netdev(dev) {
- nb->notifier_call(nb, NETDEV_REGISTER, dev);
+ if (err)
+ goto unlock;
+ if (dev_boot_phase)
+ goto unlock;
+ for_each_net(net) {
+ for_each_netdev(net, dev) {
+ err = nb->notifier_call(nb, NETDEV_REGISTER, dev);
+ err = notifier_to_errno(err);
+ if (err)
+ goto rollback;
+
+ if (!(dev->flags & IFF_UP))
+ continue;
- if (dev->flags & IFF_UP)
- nb->notifier_call(nb, NETDEV_UP, dev);
+ nb->notifier_call(nb, NETDEV_UP, dev);
}
}
+
+unlock:
rtnl_unlock();
return err;
+
+rollback:
+ last = dev;
+ for_each_net(net) {
+ for_each_netdev(net, dev) {
+ if (dev == last)
+ break;
+
+ if (dev->flags & IFF_UP) {
+ nb->notifier_call(nb, NETDEV_GOING_DOWN, dev);
+ nb->notifier_call(nb, NETDEV_DOWN, dev);
+ }
+ nb->notifier_call(nb, NETDEV_UNREGISTER, dev);
+ }
+ }
+ goto unlock;
}
/**
}
EXPORT_SYMBOL(__netif_schedule);
-void __netif_rx_schedule(struct net_device *dev)
+void dev_kfree_skb_irq(struct sk_buff *skb)
{
- unsigned long flags;
+ if (atomic_dec_and_test(&skb->users)) {
+ struct softnet_data *sd;
+ unsigned long flags;
- local_irq_save(flags);
- dev_hold(dev);
- list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
- if (dev->quota < 0)
- dev->quota += dev->weight;
- else
- dev->quota = dev->weight;
- __raise_softirq_irqoff(NET_RX_SOFTIRQ);
- local_irq_restore(flags);
+ local_irq_save(flags);
+ sd = &__get_cpu_var(softnet_data);
+ skb->next = sd->completion_queue;
+ sd->completion_queue = skb;
+ raise_softirq_irqoff(NET_TX_SOFTIRQ);
+ local_irq_restore(flags);
+ }
}
-EXPORT_SYMBOL(__netif_rx_schedule);
+EXPORT_SYMBOL(dev_kfree_skb_irq);
void dev_kfree_skb_any(struct sk_buff *skb)
{
EXPORT_SYMBOL(dev_kfree_skb_any);
-/* Hot-plugging. */
+/**
+ * netif_device_detach - mark device as removed
+ * @dev: network device
+ *
+ * Mark device as removed from system and therefore no longer available.
+ */
void netif_device_detach(struct net_device *dev)
{
if (test_and_clear_bit(__LINK_STATE_PRESENT, &dev->state) &&
}
EXPORT_SYMBOL(netif_device_detach);
+/**
+ * netif_device_attach - mark device as attached
+ * @dev: network device
+ *
+ * Mark device as attached from system and restart if needed.
+ */
void netif_device_attach(struct net_device *dev)
{
if (!test_and_set_bit(__LINK_STATE_PRESENT, &dev->state) &&
return NET_RX_SUCCESS;
}
- netif_rx_schedule(&queue->backlog_dev);
+ napi_schedule(&queue->backlog);
goto enqueue;
}
return dev;
}
+
static void net_tx_action(struct softirq_action *h)
{
struct softnet_data *sd = &__get_cpu_var(softnet_data);
__be16 type;
/* if we've gotten here through NAPI, check netpoll */
- if (skb->dev->poll && netpoll_rx(skb))
+ if (netpoll_receive_skb(skb))
return NET_RX_DROP;
if (!skb->tstamp.tv64)
return ret;
}
-static int process_backlog(struct net_device *backlog_dev, int *budget)
+static int process_backlog(struct napi_struct *napi, int quota)
{
int work = 0;
- int quota = min(backlog_dev->quota, *budget);
struct softnet_data *queue = &__get_cpu_var(softnet_data);
unsigned long start_time = jiffies;
- backlog_dev->weight = weight_p;
- for (;;) {
+ napi->weight = weight_p;
+ do {
struct sk_buff *skb;
struct net_device *dev;
local_irq_disable();
skb = __skb_dequeue(&queue->input_pkt_queue);
- if (!skb)
- goto job_done;
+ if (!skb) {
+ __napi_complete(napi);
+ local_irq_enable();
+ break;
+ }
+
local_irq_enable();
dev = skb->dev;
netif_receive_skb(skb);
dev_put(dev);
+ } while (++work < quota && jiffies == start_time);
- work++;
-
- if (work >= quota || jiffies - start_time > 1)
- break;
-
- }
-
- backlog_dev->quota -= work;
- *budget -= work;
- return -1;
-
-job_done:
- backlog_dev->quota -= work;
- *budget -= work;
+ return work;
+}
- list_del(&backlog_dev->poll_list);
- smp_mb__before_clear_bit();
- netif_poll_enable(backlog_dev);
+/**
+ * __napi_schedule - schedule for receive
+ * @napi: entry to schedule
+ *
+ * The entry's receive function will be scheduled to run
+ */
+void fastcall __napi_schedule(struct napi_struct *n)
+{
+ unsigned long flags;
- local_irq_enable();
- return 0;
+ local_irq_save(flags);
+ list_add_tail(&n->poll_list, &__get_cpu_var(softnet_data).poll_list);
+ __raise_softirq_irqoff(NET_RX_SOFTIRQ);
+ local_irq_restore(flags);
}
+EXPORT_SYMBOL(__napi_schedule);
+
static void net_rx_action(struct softirq_action *h)
{
- struct softnet_data *queue = &__get_cpu_var(softnet_data);
+ struct list_head *list = &__get_cpu_var(softnet_data).poll_list;
unsigned long start_time = jiffies;
int budget = netdev_budget;
void *have;
local_irq_disable();
- while (!list_empty(&queue->poll_list)) {
- struct net_device *dev;
+ while (!list_empty(list)) {
+ struct napi_struct *n;
+ int work, weight;
- if (budget <= 0 || jiffies - start_time > 1)
+ /* If softirq window is exhuasted then punt.
+ *
+ * Note that this is a slight policy change from the
+ * previous NAPI code, which would allow up to 2
+ * jiffies to pass before breaking out. The test
+ * used to be "jiffies - start_time > 1".
+ */
+ if (unlikely(budget <= 0 || jiffies != start_time))
goto softnet_break;
local_irq_enable();
- dev = list_entry(queue->poll_list.next,
- struct net_device, poll_list);
- have = netpoll_poll_lock(dev);
+ /* Even though interrupts have been re-enabled, this
+ * access is safe because interrupts can only add new
+ * entries to the tail of this list, and only ->poll()
+ * calls can remove this head entry from the list.
+ */
+ n = list_entry(list->next, struct napi_struct, poll_list);
- if (dev->quota <= 0 || dev->poll(dev, &budget)) {
- netpoll_poll_unlock(have);
- local_irq_disable();
- list_move_tail(&dev->poll_list, &queue->poll_list);
- if (dev->quota < 0)
- dev->quota += dev->weight;
- else
- dev->quota = dev->weight;
- } else {
- netpoll_poll_unlock(have);
- dev_put(dev);
- local_irq_disable();
- }
+ have = netpoll_poll_lock(n);
+
+ weight = n->weight;
+
+ work = n->poll(n, weight);
+
+ WARN_ON_ONCE(work > weight);
+
+ budget -= work;
+
+ local_irq_disable();
+
+ /* Drivers must not modify the NAPI state if they
+ * consume the entire weight. In such cases this code
+ * still "owns" the NAPI instance and therefore can
+ * move the instance around on the list at-will.
+ */
+ if (unlikely(work == weight))
+ list_move_tail(&n->poll_list, list);
+
+ netpoll_poll_unlock(have);
}
out:
local_irq_enable();
+
#ifdef CONFIG_NET_DMA
/*
* There may not be any more sk_buffs coming right now, so push
}
}
#endif
+
return;
softnet_break:
* match. --pb
*/
-static int dev_ifname(struct ifreq __user *arg)
+static int dev_ifname(struct net *net, struct ifreq __user *arg)
{
struct net_device *dev;
struct ifreq ifr;
return -EFAULT;
read_lock(&dev_base_lock);
- dev = __dev_get_by_index(ifr.ifr_ifindex);
+ dev = __dev_get_by_index(net, ifr.ifr_ifindex);
if (!dev) {
read_unlock(&dev_base_lock);
return -ENODEV;
* Thus we will need a 'compatibility mode'.
*/
-static int dev_ifconf(char __user *arg)
+static int dev_ifconf(struct net *net, char __user *arg)
{
struct ifconf ifc;
struct net_device *dev;
*/
total = 0;
- for_each_netdev(dev) {
+ for_each_netdev(net, dev) {
for (i = 0; i < NPROTO; i++) {
if (gifconf_list[i]) {
int done;
*/
void *dev_seq_start(struct seq_file *seq, loff_t *pos)
{
+ struct net *net = seq->private;
loff_t off;
struct net_device *dev;
return SEQ_START_TOKEN;
off = 1;
- for_each_netdev(dev)
+ for_each_netdev(net, dev)
if (off++ == *pos)
return dev;
void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
+ struct net *net = seq->private;
++*pos;
return v == SEQ_START_TOKEN ?
- first_net_device() : next_net_device((struct net_device *)v);
+ first_net_device(net) : next_net_device((struct net_device *)v);
}
void dev_seq_stop(struct seq_file *seq, void *v)
static int dev_seq_open(struct inode *inode, struct file *file)
{
- return seq_open(file, &dev_seq_ops);
+ struct seq_file *seq;
+ int res;
+ res = seq_open(file, &dev_seq_ops);
+ if (!res) {
+ seq = file->private_data;
+ seq->private = get_net(PROC_NET(inode));
+ }
+ return res;
+}
+
+static int dev_seq_release(struct inode *inode, struct file *file)
+{
+ struct seq_file *seq = file->private_data;
+ struct net *net = seq->private;
+ put_net(net);
+ return seq_release(inode, file);
}
static const struct file_operations dev_seq_fops = {
.open = dev_seq_open,
.read = seq_read,
.llseek = seq_lseek,
- .release = seq_release,
+ .release = dev_seq_release,
};
static const struct seq_operations softnet_seq_ops = {
};
-static int __init dev_proc_init(void)
+static int dev_proc_net_init(struct net *net)
{
int rc = -ENOMEM;
- if (!proc_net_fops_create("dev", S_IRUGO, &dev_seq_fops))
+ if (!proc_net_fops_create(net, "dev", S_IRUGO, &dev_seq_fops))
goto out;
- if (!proc_net_fops_create("softnet_stat", S_IRUGO, &softnet_seq_fops))
+ if (!proc_net_fops_create(net, "softnet_stat", S_IRUGO, &softnet_seq_fops))
goto out_dev;
- if (!proc_net_fops_create("ptype", S_IRUGO, &ptype_seq_fops))
- goto out_dev2;
-
- if (wext_proc_init())
+ if (!proc_net_fops_create(net, "ptype", S_IRUGO, &ptype_seq_fops))
goto out_softnet;
+
+ if (wext_proc_init(net))
+ goto out_ptype;
rc = 0;
out:
return rc;
+out_ptype:
+ proc_net_remove(net, "ptype");
out_softnet:
- proc_net_remove("ptype");
-out_dev2:
- proc_net_remove("softnet_stat");
+ proc_net_remove(net, "softnet_stat");
out_dev:
- proc_net_remove("dev");
+ proc_net_remove(net, "dev");
goto out;
}
+
+static void dev_proc_net_exit(struct net *net)
+{
+ wext_proc_exit(net);
+
+ proc_net_remove(net, "ptype");
+ proc_net_remove(net, "softnet_stat");
+ proc_net_remove(net, "dev");
+}
+
+static struct pernet_operations dev_proc_ops = {
+ .init = dev_proc_net_init,
+ .exit = dev_proc_net_exit,
+};
+
+static int __init dev_proc_init(void)
+{
+ return register_pernet_subsys(&dev_proc_ops);
+}
#else
#define dev_proc_init() 0
#endif /* CONFIG_PROC_FS */
/*
* Perform the SIOCxIFxxx calls.
*/
-static int dev_ifsioc(struct ifreq *ifr, unsigned int cmd)
+static int dev_ifsioc(struct net *net, struct ifreq *ifr, unsigned int cmd)
{
int err;
- struct net_device *dev = __dev_get_by_name(ifr->ifr_name);
+ struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
if (!dev)
return -ENODEV;
* positive or a negative errno code on error.
*/
-int dev_ioctl(unsigned int cmd, void __user *arg)
+int dev_ioctl(struct net *net, unsigned int cmd, void __user *arg)
{
struct ifreq ifr;
int ret;
if (cmd == SIOCGIFCONF) {
rtnl_lock();
- ret = dev_ifconf((char __user *) arg);
+ ret = dev_ifconf(net, (char __user *) arg);
rtnl_unlock();
return ret;
}
if (cmd == SIOCGIFNAME)
- return dev_ifname((struct ifreq __user *)arg);
+ return dev_ifname(net, (struct ifreq __user *)arg);
if (copy_from_user(&ifr, arg, sizeof(struct ifreq)))
return -EFAULT;
case SIOCGIFMAP:
case SIOCGIFINDEX:
case SIOCGIFTXQLEN:
- dev_load(ifr.ifr_name);
+ dev_load(net, ifr.ifr_name);
read_lock(&dev_base_lock);
- ret = dev_ifsioc(&ifr, cmd);
+ ret = dev_ifsioc(net, &ifr, cmd);
read_unlock(&dev_base_lock);
if (!ret) {
if (colon)
return ret;
case SIOCETHTOOL:
- dev_load(ifr.ifr_name);
+ dev_load(net, ifr.ifr_name);
rtnl_lock();
- ret = dev_ethtool(&ifr);
+ ret = dev_ethtool(net, &ifr);
rtnl_unlock();
if (!ret) {
if (colon)
case SIOCSIFNAME:
if (!capable(CAP_NET_ADMIN))
return -EPERM;
- dev_load(ifr.ifr_name);
+ dev_load(net, ifr.ifr_name);
rtnl_lock();
- ret = dev_ifsioc(&ifr, cmd);
+ ret = dev_ifsioc(net, &ifr, cmd);
rtnl_unlock();
if (!ret) {
if (colon)
/* fall through */
case SIOCBONDSLAVEINFOQUERY:
case SIOCBONDINFOQUERY:
- dev_load(ifr.ifr_name);
+ dev_load(net, ifr.ifr_name);
rtnl_lock();
- ret = dev_ifsioc(&ifr, cmd);
+ ret = dev_ifsioc(net, &ifr, cmd);
rtnl_unlock();
return ret;
if (cmd == SIOCWANDEV ||
(cmd >= SIOCDEVPRIVATE &&
cmd <= SIOCDEVPRIVATE + 15)) {
- dev_load(ifr.ifr_name);
+ dev_load(net, ifr.ifr_name);
rtnl_lock();
- ret = dev_ifsioc(&ifr, cmd);
+ ret = dev_ifsioc(net, &ifr, cmd);
rtnl_unlock();
if (!ret && copy_to_user(arg, &ifr,
sizeof(struct ifreq)))
}
/* Take care of Wireless Extensions */
if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST)
- return wext_handle_ioctl(&ifr, cmd, arg);
+ return wext_handle_ioctl(net, &ifr, cmd, arg);
return -EINVAL;
}
}
* number. The caller must hold the rtnl semaphore or the
* dev_base_lock to be sure it remains unique.
*/
-static int dev_new_index(void)
+static int dev_new_index(struct net *net)
{
static int ifindex;
for (;;) {
if (++ifindex <= 0)
ifindex = 1;
- if (!__dev_get_by_index(ifindex))
+ if (!__dev_get_by_index(net, ifindex))
return ifindex;
}
}
-static int dev_boot_phase = 1;
-
/* Delayed registration/unregisteration */
static DEFINE_SPINLOCK(net_todo_list_lock);
static struct list_head net_todo_list = LIST_HEAD_INIT(net_todo_list);
struct hlist_head *head;
struct hlist_node *p;
int ret;
+ struct net *net;
BUG_ON(dev_boot_phase);
ASSERT_RTNL();
/* When net_device's are persistent, this will be fatal. */
BUG_ON(dev->reg_state != NETREG_UNINITIALIZED);
+ BUG_ON(!dev->nd_net);
+ net = dev->nd_net;
spin_lock_init(&dev->queue_lock);
spin_lock_init(&dev->_xmit_lock);
if (!dev_valid_name(dev->name)) {
ret = -EINVAL;
- goto out;
+ goto err_uninit;
}
- dev->ifindex = dev_new_index();
+ dev->ifindex = dev_new_index(net);
if (dev->iflink == -1)
dev->iflink = dev->ifindex;
/* Check for existence of name */
- head = dev_name_hash(dev->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 out;
+ goto err_uninit;
}
}
ret = netdev_register_sysfs(dev);
if (ret)
- goto out;
+ goto err_uninit;
dev->reg_state = NETREG_REGISTERED;
/*
dev_init_scheduler(dev);
write_lock_bh(&dev_base_lock);
- list_add_tail(&dev->dev_list, &dev_base_head);
+ list_add_tail(&dev->dev_list, &net->dev_base_head);
hlist_add_head(&dev->name_hlist, head);
- hlist_add_head(&dev->index_hlist, dev_index_hash(dev->ifindex));
+ hlist_add_head(&dev->index_hlist, dev_index_hash(net, dev->ifindex));
dev_hold(dev);
write_unlock_bh(&dev_base_lock);
/* Notify protocols, that a new device appeared. */
- raw_notifier_call_chain(&netdev_chain, NETDEV_REGISTER, dev);
-
- ret = 0;
+ ret = raw_notifier_call_chain(&netdev_chain, NETDEV_REGISTER, dev);
+ ret = notifier_to_errno(ret);
+ if (ret)
+ unregister_netdevice(dev);
out:
return ret;
+
+err_uninit:
+ if (dev->uninit)
+ dev->uninit(dev);
+ goto out;
}
/**
dev = (struct net_device *)
(((long)p + NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
dev->padded = (char *)dev - (char *)p;
+ dev->nd_net = &init_net;
if (sizeof_priv) {
dev->priv = ((char *)dev +
dev->egress_subqueue_count = queue_count;
dev->get_stats = internal_stats;
+ netpoll_netdev_init(dev);
setup(dev);
strcpy(dev->name, name);
return dev;
static int __init netdev_dma_register(void) { return -ENODEV; }
#endif /* CONFIG_NET_DMA */
+/**
+ * netdev_compute_feature - compute conjunction of two feature sets
+ * @all: first feature set
+ * @one: second feature set
+ *
+ * Computes a new feature set after adding a device with feature set
+ * @one to the master device with current feature set @all. Returns
+ * the new feature set.
+ */
+int netdev_compute_features(unsigned long all, unsigned long one)
+{
+ /* if device needs checksumming, downgrade to hw checksumming */
+ if (all & NETIF_F_NO_CSUM && !(one & NETIF_F_NO_CSUM))
+ all ^= NETIF_F_NO_CSUM | NETIF_F_HW_CSUM;
+
+ /* if device can't do all checksum, downgrade to ipv4/ipv6 */
+ if (all & NETIF_F_HW_CSUM && !(one & NETIF_F_HW_CSUM))
+ all ^= NETIF_F_HW_CSUM
+ | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
+
+ if (one & NETIF_F_GSO)
+ one |= NETIF_F_GSO_SOFTWARE;
+ one |= NETIF_F_GSO;
+
+ /* If even one device supports robust GSO, enable it for all. */
+ if (one & NETIF_F_GSO_ROBUST)
+ all |= NETIF_F_GSO_ROBUST;
+
+ all &= one | NETIF_F_LLTX;
+
+ if (!(all & NETIF_F_ALL_CSUM))
+ all &= ~NETIF_F_SG;
+ if (!(all & NETIF_F_SG))
+ all &= ~NETIF_F_GSO_MASK;
+
+ return all;
+}
+EXPORT_SYMBOL(netdev_compute_features);
+
+/* Initialize per network namespace state */
+static int netdev_init(struct net *net)
+{
+ int i;
+ INIT_LIST_HEAD(&net->dev_base_head);
+ rwlock_init(&dev_base_lock);
+
+ net->dev_name_head = kmalloc(
+ sizeof(*net->dev_name_head)*NETDEV_HASHENTRIES, GFP_KERNEL);
+ if (!net->dev_name_head)
+ return -ENOMEM;
+
+ net->dev_index_head = kmalloc(
+ sizeof(*net->dev_index_head)*NETDEV_HASHENTRIES, GFP_KERNEL);
+ if (!net->dev_index_head) {
+ kfree(net->dev_name_head);
+ return -ENOMEM;
+ }
+
+ for (i = 0; i < NETDEV_HASHENTRIES; i++)
+ INIT_HLIST_HEAD(&net->dev_name_head[i]);
+
+ for (i = 0; i < NETDEV_HASHENTRIES; i++)
+ INIT_HLIST_HEAD(&net->dev_index_head[i]);
+
+ return 0;
+}
+
+static void netdev_exit(struct net *net)
+{
+ kfree(net->dev_name_head);
+ kfree(net->dev_index_head);
+}
+
+static struct pernet_operations netdev_net_ops = {
+ .init = netdev_init,
+ .exit = netdev_exit,
+};
+
/*
* Initialize the DEV module. At boot time this walks the device list and
* unhooks any devices that fail to initialise (normally hardware not
for (i = 0; i < 16; i++)
INIT_LIST_HEAD(&ptype_base[i]);
- for (i = 0; i < ARRAY_SIZE(dev_name_head); i++)
- INIT_HLIST_HEAD(&dev_name_head[i]);
-
- for (i = 0; i < ARRAY_SIZE(dev_index_head); i++)
- INIT_HLIST_HEAD(&dev_index_head[i]);
+ if (register_pernet_subsys(&netdev_net_ops))
+ goto out;
/*
* Initialise the packet receive queues.
skb_queue_head_init(&queue->input_pkt_queue);
queue->completion_queue = NULL;
INIT_LIST_HEAD(&queue->poll_list);
- set_bit(__LINK_STATE_START, &queue->backlog_dev.state);
- queue->backlog_dev.weight = weight_p;
- queue->backlog_dev.poll = process_backlog;
- atomic_set(&queue->backlog_dev.refcnt, 1);
+
+ queue->backlog.poll = process_backlog;
+ queue->backlog.weight = weight_p;
}
netdev_dma_register();
git.openpandora.org / pandora-kernel.git / blobdiff