linux-imx

/*

 *  Copyright (C) 2007

 *

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

 *

 *  This program is free software; you can redistribute it and/or

 *  modify it under the terms of the GNU General Public License as

 *  published by the Free Software Foundation, version 2 of the

 *  License.

 */

​

#include <linux/module.h>

#include <linux/ipc.h>

#include <linux/nsproxy.h>

#include <linux/sysctl.h>

#include <linux/uaccess.h>

#include <linux/ipc_namespace.h>

#include <linux/msg.h>

#include "util.h"

​

static void *get_ipc(struct ctl_table *table)

{

    char *which = table->data;

    struct ipc_namespace *ipc_ns = current->nsproxy->ipc_ns;

    which = (which - (char *)&init_ipc_ns) + (char *)ipc_ns;

    return which;

}

​

#ifdef CONFIG_PROC_SYSCTL

static int proc_ipc_dointvec(struct ctl_table *table, int write,

    void __user *buffer, size_t *lenp, loff_t *ppos)

{

    struct ctl_table ipc_table;

​

    memcpy(&ipc_table, table, sizeof(ipc_table));

    ipc_table.data = get_ipc(table);

​

    return proc_dointvec(&ipc_table, write, buffer, lenp, ppos);

}

​

static int proc_ipc_dointvec_minmax(struct ctl_table *table, int write,

    void __user *buffer, size_t *lenp, loff_t *ppos)

{

    struct ctl_table ipc_table;

​

    memcpy(&ipc_table, table, sizeof(ipc_table));

    ipc_table.data = get_ipc(table);

​

    return proc_dointvec_minmax(&ipc_table, write, buffer, lenp, ppos);

}

​

static int proc_ipc_dointvec_minmax_orphans(struct ctl_table *table, int write,

    void __user *buffer, size_t *lenp, loff_t *ppos)

{

    struct ipc_namespace *ns = current->nsproxy->ipc_ns;

    int err = proc_ipc_dointvec_minmax(table, write, buffer, lenp, ppos);

​

    if (err < 0)

        return err;

    if (ns->shm_rmid_forced)

        shm_destroy_orphaned(ns);

    return err;

}