dm-linear.c (633a08b81206122469365b4c72eaeb71f04f2cb4) dm-linear.c (586e80e6ee0d137c7d79fbae183bb37bc60ee97e)
1/*
2 * Copyright (C) 2001-2003 Sistina Software (UK) Limited.
3 *
4 * This file is released under the GPL.
5 */
6
7#include "dm.h"
1/*
2 * Copyright (C) 2001-2003 Sistina Software (UK) Limited.
3 *
4 * This file is released under the GPL.
5 */
6
7#include "dm.h"
8
9#include <linux/module.h>
10#include <linux/init.h>
11#include <linux/blkdev.h>
12#include <linux/bio.h>
13#include <linux/slab.h>
8#include <linux/module.h>
9#include <linux/init.h>
10#include <linux/blkdev.h>
11#include <linux/bio.h>
12#include <linux/slab.h>
13#include <linux/device-mapper.h>
14
15#define DM_MSG_PREFIX "linear"
16
17/*
18 * Linear: maps a linear range of a device.
19 */
20struct linear_c {
21 struct dm_dev *dev;

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105 case STATUSTYPE_TABLE:
106 snprintf(result, maxlen, "%s %llu", lc->dev->name,
107 (unsigned long long)lc->start);
108 break;
109 }
110 return 0;
111}
112
14
15#define DM_MSG_PREFIX "linear"
16
17/*
18 * Linear: maps a linear range of a device.
19 */
20struct linear_c {
21 struct dm_dev *dev;

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105 case STATUSTYPE_TABLE:
106 snprintf(result, maxlen, "%s %llu", lc->dev->name,
107 (unsigned long long)lc->start);
108 break;
109 }
110 return 0;
111}
112
113static int linear_ioctl(struct dm_target *ti, unsigned int cmd,
113static int linear_ioctl(struct dm_target *ti, struct inode *inode,
114 struct file *filp, unsigned int cmd,
114 unsigned long arg)
115{
116 struct linear_c *lc = (struct linear_c *) ti->private;
115 unsigned long arg)
116{
117 struct linear_c *lc = (struct linear_c *) ti->private;
117 return __blkdev_driver_ioctl(lc->dev->bdev, lc->dev->mode, cmd, arg);
118 struct block_device *bdev = lc->dev->bdev;
119 struct file fake_file = {};
120 struct dentry fake_dentry = {};
121
122 fake_file.f_mode = lc->dev->mode;
123 fake_file.f_path.dentry = &fake_dentry;
124 fake_dentry.d_inode = bdev->bd_inode;
125
126 return blkdev_driver_ioctl(bdev->bd_inode, &fake_file, bdev->bd_disk, cmd, arg);
118}
119
120static int linear_merge(struct dm_target *ti, struct bvec_merge_data *bvm,
121 struct bio_vec *biovec, int max_size)
122{
123 struct linear_c *lc = ti->private;
124 struct request_queue *q = bdev_get_queue(lc->dev->bdev);
125

--- 38 unchanged lines hidden --- 		127}
128
129static int linear_merge(struct dm_target *ti, struct bvec_merge_data *bvm,
130 struct bio_vec *biovec, int max_size)
131{
132 struct linear_c *lc = ti->private;
133 struct request_queue *q = bdev_get_queue(lc->dev->bdev);
134

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