Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

/*

 *  linux/fs/proc/net.c

 *

 *  Copyright (C) 2007

 *

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

 *

 *  proc net directory handling functions

 */

#include <asm/uaccess.h>

#include <linux/errno.h>

#include <linux/time.h>

#include <linux/proc_fs.h>

#include <linux/stat.h>

#include <linux/init.h>

#include <linux/sched.h>

#include <linux/module.h>

#include <linux/bitops.h>

#include <linux/smp_lock.h>

#include <linux/mount.h>

#include <linux/nsproxy.h>

#include <net/net_namespace.h>

#include "internal.h"

struct proc_dir_entry *proc_net_fops_create(struct net *net,

        const char *name, mode_t mode, const struct file_operations *fops)

{

        struct proc_dir_entry *res;

        res = create_proc_entry(name, mode, net->proc_net);

        if (res)

                res->proc_fops = fops;

        return res;

}

EXPORT_SYMBOL_GPL(proc_net_fops_create);

void proc_net_remove(struct net *net, const char *name)

{

        remove_proc_entry(name, net->proc_net);

}

EXPORT_SYMBOL_GPL(proc_net_remove);

struct net *get_proc_net(const struct inode *inode)

{

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

}

EXPORT_SYMBOL_GPL(get_proc_net);

static struct proc_dir_entry *shadow_pde;

static struct proc_dir_entry *proc_net_shadow(struct task_struct *task,

                                                struct proc_dir_entry *de)

{

        return task->nsproxy->net_ns->proc_net;

}

static __net_init int proc_net_ns_init(struct net *net)

{

        struct proc_dir_entry *root, *netd, *net_statd;

        int err;

        err = -ENOMEM;

        root = kzalloc(sizeof(*root), GFP_KERNEL);

        if (!root)

                goto out;

        err = -EEXIST;

        netd = proc_mkdir("net", root);

        if (!netd)

                goto free_root;

        err = -EEXIST;

        net_statd = proc_mkdir("stat", netd);

        if (!net_statd)

                goto free_net;

        root->data = net;

        netd->data = net;

        net_statd->data = net;

        net->proc_net_root = root;

        net->proc_net = netd;

        net->proc_net_stat = net_statd;

        err = 0;

out:

        return err;

free_net:

        remove_proc_entry("net", root);

free_root:

        kfree(root);

        goto out;

}

static __net_exit void proc_net_ns_exit(struct net *net)

{

        remove_proc_entry("stat", net->proc_net);

        remove_proc_entry("net", net->proc_net_root);

        kfree(net->proc_net_root);

}

static struct pernet_operations __net_initdata proc_net_ns_ops = {

        .init = proc_net_ns_init,

        .exit = proc_net_ns_exit,

};

int __init proc_net_init(void)

{

        shadow_pde = proc_mkdir("net", NULL);

        shadow_pde->shadow_proc = proc_net_shadow;

        return register_pernet_subsys(&proc_net_ns_ops);

}