linux-imx

/*

 *  Copyright (C) 2007 IBM Corporation

 *

 *  Author: Cedric Le Goater <clg@fr.ibm.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/nsproxy.h>

#include <linux/ipc_namespace.h>

#include <linux/sysctl.h>

​

#ifdef CONFIG_PROC_SYSCTL

static void *get_mq(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;

}

​

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

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

{

    struct ctl_table mq_table;

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

    mq_table.data = get_mq(table);

​

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

}

​

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

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

{

    struct ctl_table mq_table;

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

    mq_table.data = get_mq(table);

​

    return proc_dointvec_minmax(&mq_table, write, buffer,

                    lenp, ppos);

}

#else

#define proc_mq_dointvec NULL

#define proc_mq_dointvec_minmax NULL

#endif

​

static int msg_max_limit_min = MIN_MSGMAX;

static int msg_max_limit_max = HARD_MSGMAX;

​

static int msg_maxsize_limit_min = MIN_MSGSIZEMAX;

static int msg_maxsize_limit_max = HARD_MSGSIZEMAX;

​

static struct ctl_table mq_sysctls[] = {

    {

        .procname   = "queues_max",

        .data       = &init_ipc_ns.mq_queues_max,

        .maxlen     = sizeof(int),

        .mode       = 0644,

        .proc_handler   = proc_mq_dointvec,

    },