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authorEric W. Biederman <ebiederm@xmission.com>2007-09-17 11:56:21 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2007-10-10 16:49:10 -0700
commit881d966b48b035ab3f3aeaae0f3d3f9b584f45b2 (patch)
treec579d59a4107cbbe9e2b85939bc0d496b815c887 /net/wireless
parentb4b510290b056b86611757ce1175a230f1080f53 (diff)
[NET]: Make the device list and device lookups per namespace.
This patch makes most of the generic device layer network namespace safe. This patch makes dev_base_head a network namespace variable, and then it picks up a few associated variables. The functions: dev_getbyhwaddr dev_getfirsthwbytype dev_get_by_flags dev_get_by_name __dev_get_by_name dev_get_by_index __dev_get_by_index dev_ioctl dev_ethtool dev_load wireless_process_ioctl were modified to take a network namespace argument, and deal with it. vlan_ioctl_set and brioctl_set were modified so their hooks will receive a network namespace argument. So basically anthing in the core of the network stack that was affected to by the change of dev_base was modified to handle multiple network namespaces. The rest of the network stack was simply modified to explicitly use &init_net the initial network namespace. This can be fixed when those components of the network stack are modified to handle multiple network namespaces. For now the ifindex generator is left global. Fundametally ifindex numbers are per namespace, or else we will have corner case problems with migration when we get that far. At the same time there are assumptions in the network stack that the ifindex of a network device won't change. Making the ifindex number global seems a good compromise until the network stack can cope with ifindex changes when you change namespaces, and the like. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/wireless')
-rw-r--r--net/wireless/wext.c38
1 files changed, 29 insertions, 9 deletions
diff --git a/net/wireless/wext.c b/net/wireless/wext.c
index b8069afe0410..e8b3409d6c8b 100644
--- a/net/wireless/wext.c
+++ b/net/wireless/wext.c
@@ -673,7 +673,22 @@ static const struct seq_operations wireless_seq_ops = {
static int wireless_seq_open(struct inode *inode, struct file *file)
{
- return seq_open(file, &wireless_seq_ops);
+ struct seq_file *seq;
+ int res;
+ res = seq_open(file, &wireless_seq_ops);
+ if (!res) {
+ seq = file->private_data;
+ seq->private = get_net(PROC_NET(inode));
+ }
+ return res;
+}
+
+static int wireless_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 wireless_seq_fops = {
@@ -681,17 +696,22 @@ static const struct file_operations wireless_seq_fops = {
.open = wireless_seq_open,
.read = seq_read,
.llseek = seq_lseek,
- .release = seq_release,
+ .release = wireless_seq_release,
};
-int __init wext_proc_init(void)
+int wext_proc_init(struct net *net)
{
/* Create /proc/net/wireless entry */
- if (!proc_net_fops_create(&init_net, "wireless", S_IRUGO, &wireless_seq_fops))
+ if (!proc_net_fops_create(net, "wireless", S_IRUGO, &wireless_seq_fops))
return -ENOMEM;
return 0;
}
+
+void wext_proc_exit(struct net *net)
+{
+ proc_net_remove(net, "wireless");
+}
#endif /* CONFIG_PROC_FS */
/************************** IOCTL SUPPORT **************************/
@@ -1011,7 +1031,7 @@ static int ioctl_private_call(struct net_device *dev, struct ifreq *ifr,
* Main IOCTl dispatcher.
* Check the type of IOCTL and call the appropriate wrapper...
*/
-static int wireless_process_ioctl(struct ifreq *ifr, unsigned int cmd)
+static int wireless_process_ioctl(struct net *net, struct ifreq *ifr, unsigned int cmd)
{
struct net_device *dev;
iw_handler handler;
@@ -1020,7 +1040,7 @@ static int wireless_process_ioctl(struct ifreq *ifr, unsigned int cmd)
* The copy_to/from_user() of ifr is also dealt with in there */
/* Make sure the device exist */
- if ((dev = __dev_get_by_name(ifr->ifr_name)) == NULL)
+ if ((dev = __dev_get_by_name(net, ifr->ifr_name)) == NULL)
return -ENODEV;
/* A bunch of special cases, then the generic case...
@@ -1054,7 +1074,7 @@ static int wireless_process_ioctl(struct ifreq *ifr, unsigned int cmd)
}
/* entry point from dev ioctl */
-int wext_handle_ioctl(struct ifreq *ifr, unsigned int cmd,
+int wext_handle_ioctl(struct net *net, struct ifreq *ifr, unsigned int cmd,
void __user *arg)
{
int ret;
@@ -1066,9 +1086,9 @@ int wext_handle_ioctl(struct ifreq *ifr, unsigned int cmd,
&& !capable(CAP_NET_ADMIN))
return -EPERM;
- dev_load(ifr->ifr_name);
+ dev_load(net, ifr->ifr_name);
rtnl_lock();
- ret = wireless_process_ioctl(ifr, cmd);
+ ret = wireless_process_ioctl(net, ifr, cmd);
rtnl_unlock();
if (IW_IS_GET(cmd) && copy_to_user(arg, ifr, sizeof(struct ifreq)))
return -EFAULT;

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