linux-imx

/*

 *  linux/fs/proc/net.c

 *

 *  Copyright (C) 2007

 *

 *  Author: Eric Biederman <ebiederm@xmission.com>

 *

 *  proc net directory handling functions

 */

​

#include <linux/uaccess.h>

​

#include <linux/errno.h>

#include <linux/time.h>

#include <linux/proc_fs.h>

#include <linux/stat.h>

#include <linux/slab.h>

#include <linux/init.h>

#include <linux/sched.h>

#include <linux/sched/task.h>

#include <linux/module.h>

#include <linux/bitops.h>

#include <linux/mount.h>

#include <linux/nsproxy.h>

#include <linux/uidgid.h>

#include <net/net_namespace.h>

#include <linux/seq_file.h>

​

#include "internal.h"

​

static inline struct net *PDE_NET(struct proc_dir_entry *pde)

{

    return pde->parent->data;

}

​

static struct net *get_proc_net(const struct inode *inode)

{

    return maybe_get_net(PDE_NET(PDE(inode)));

}

​

static int proc_net_d_revalidate(struct dentry *dentry, unsigned int flags)

{

    return 0;

}

​

static const struct dentry_operations proc_net_dentry_ops = {

    .d_revalidate   = proc_net_d_revalidate,

    .d_delete   = always_delete_dentry,

};

​

static void pde_force_lookup(struct proc_dir_entry *pde)

{

    /* /proc/net/ entries can be changed under us by setns(CLONE_NEWNET) */

    pde->proc_dops = &proc_net_dentry_ops;

}

​

static int seq_open_net(struct inode *inode, struct file *file)

{

    unsigned int state_size = PDE(inode)->state_size;

    struct seq_net_private *p;

    struct net *net;

​

    WARN_ON_ONCE(state_size < sizeof(*p));