On 09/23/2010 10:51 AM, Eric W. Biederman wrote:
Take advantage of the new abstraction and allow network devices
to be placed in any network namespace that we have a fd to talk
about.
Signed-off-by: Eric W. Biederman<ebiederm@xxxxxxxxxxxx>
---
[ ... ]
+struct net *get_net_ns_by_fd(int fd)
+{
+ struct proc_inode *ei;
+ struct file *file;
+ struct net *net;
+
+ file = NULL;
+ net = ERR_PTR(-EINVAL);
+ file = proc_ns_fget(fd);
+ if (!fd)
+ goto out;
+ return ERR_PTR(-EINVAL);
+
+ ei = PROC_I(file->f_dentry->d_inode);
+ if (ei->ns_ops !=&netns_operations)
+ goto out;
Is this check necessary here ? proc_ns_fget checks "file->f_op !=
&ns_file_operations", no ?
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