linux-imx

/*

 * Copyright (C) 2001, 2002 Sistina Software (UK) Limited.

 * Copyright (C) 2004 - 2006 Red Hat, Inc. All rights reserved.

 *

 * This file is released under the GPL.

 */

​

#include "dm-core.h"

​

#include <linux/module.h>

#include <linux/vmalloc.h>

#include <linux/miscdevice.h>

#include <linux/sched/mm.h>

#include <linux/init.h>

#include <linux/wait.h>

#include <linux/slab.h>

#include <linux/dm-ioctl.h>

#include <linux/hdreg.h>

#include <linux/compat.h>

​

#include <linux/uaccess.h>

​

#define DM_MSG_PREFIX "ioctl"

#define DM_DRIVER_EMAIL "dm-devel@redhat.com"

​

struct dm_file {

    /*

     * poll will wait until the global event number is greater than

     * this value.

     */

    volatile unsigned global_event_nr;

};

​

/*-----------------------------------------------------------------

 * The ioctl interface needs to be able to look up devices by

 * name or uuid.

 *---------------------------------------------------------------*/

struct hash_cell {

    struct list_head name_list;

    struct list_head uuid_list;

​

    char *name;

    char *uuid;

    struct mapped_device *md;

    struct dm_table *new_map;

};

​

struct vers_iter {

    size_t param_size;

    struct dm_target_versions *vers, *old_vers;

    char *end;

    uint32_t flags;

};

​

​

#define NUM_BUCKETS 64

#define MASK_BUCKETS (NUM_BUCKETS - 1)

static struct list_head _name_buckets[NUM_BUCKETS];

static struct list_head _uuid_buckets[NUM_BUCKETS];

​

static void dm_hash_remove_all(bool keep_open_devices, bool mark_deferred, bool only_deferred);

​

/*