[mirror_ubuntu-jammy-kernel.git] / block / ioctl.c

// SPDX-License-Identifier: GPL-2.0
#include <linux/capability.h>
#include <linux/compat.h>
#include <linux/blkdev.h>
#include <linux/export.h>
#include <linux/gfp.h>
#include <linux/blkpg.h>
#include <linux/hdreg.h>
#include <linux/backing-dev.h>
#include <linux/fs.h>
#include <linux/blktrace_api.h>
#include <linux/pr.h>
#include <linux/uaccess.h>
#include "blk.h"

static int blkpg_do_ioctl(struct block_device *bdev,
			  struct blkpg_partition __user *upart, int op)
{
	struct gendisk *disk = bdev->bd_disk;
	struct blkpg_partition p;
	long long start, length;

	if (!capable(CAP_SYS_ADMIN))
		return -EACCES;
	if (copy_from_user(&p, upart, sizeof(struct blkpg_partition)))
		return -EFAULT;
	if (bdev_is_partition(bdev))
		return -EINVAL;

	if (p.pno <= 0)
		return -EINVAL;

	if (op == BLKPG_DEL_PARTITION)
		return bdev_del_partition(disk, p.pno);

	start = p.start >> SECTOR_SHIFT;
	length = p.length >> SECTOR_SHIFT;

	switch (op) {
	case BLKPG_ADD_PARTITION:
		/* check if partition is aligned to blocksize */
		if (p.start & (bdev_logical_block_size(bdev) - 1))
			return -EINVAL;
		return bdev_add_partition(disk, p.pno, start, length);
	case BLKPG_RESIZE_PARTITION:
		return bdev_resize_partition(disk, p.pno, start, length);
	default:
		return -EINVAL;
	}
}

static int blkpg_ioctl(struct block_device *bdev,
		       struct blkpg_ioctl_arg __user *arg)
{
	struct blkpg_partition __user *udata;
	int op;

	if (get_user(op, &arg->op) || get_user(udata, &arg->data))
		return -EFAULT;

	return blkpg_do_ioctl(bdev, udata, op);
}

#ifdef CONFIG_COMPAT
struct compat_blkpg_ioctl_arg {
	compat_int_t op;
	compat_int_t flags;
	compat_int_t datalen;
	compat_caddr_t data;
};

static int compat_blkpg_ioctl(struct block_device *bdev,
			      struct compat_blkpg_ioctl_arg __user *arg)
{
	compat_caddr_t udata;
	int op;

	if (get_user(op, &arg->op) || get_user(udata, &arg->data))
		return -EFAULT;

	return blkpg_do_ioctl(bdev, compat_ptr(udata), op);
}
#endif

static int blkdev_reread_part(struct block_device *bdev, fmode_t mode)
{
	struct block_device *tmp;

	if (!disk_part_scan_enabled(bdev->bd_disk) || bdev_is_partition(bdev))
		return -EINVAL;
	if (!capable(CAP_SYS_ADMIN))
		return -EACCES;
	if (bdev->bd_disk->open_partitions)
		return -EBUSY;

	/*
	 * Reopen the device to revalidate the driver state and force a
	 * partition rescan.
	 */
	mode &= ~FMODE_EXCL;
	set_bit(GD_NEED_PART_SCAN, &bdev->bd_disk->state);

	tmp = blkdev_get_by_dev(bdev->bd_dev, mode, NULL);
	if (IS_ERR(tmp))
		return PTR_ERR(tmp);
	blkdev_put(tmp, mode);
	return 0;
}

static int blk_ioctl_discard(struct block_device *bdev, fmode_t mode,
		unsigned long arg, unsigned long flags)
{
	uint64_t range[2];
	uint64_t start, len;
	struct request_queue *q = bdev_get_queue(bdev);
	struct inode *inode = bdev->bd_inode;
	int err;

	if (!(mode & FMODE_WRITE))
		return -EBADF;

	if (!blk_queue_discard(q))
		return -EOPNOTSUPP;

	if (copy_from_user(range, (void __user *)arg, sizeof(range)))
		return -EFAULT;

	start = range[0];
	len = range[1];

	if (start & 511)
		return -EINVAL;
	if (len & 511)
		return -EINVAL;

	if (start + len > i_size_read(bdev->bd_inode))
		return -EINVAL;

	filemap_invalidate_lock(inode->i_mapping);
	err = truncate_bdev_range(bdev, mode, start, start + len - 1);
	if (err)
		goto fail;

	err = blkdev_issue_discard(bdev, start >> 9, len >> 9,
				   GFP_KERNEL, flags);

fail:
	filemap_invalidate_unlock(inode->i_mapping);
	return err;
}

static int blk_ioctl_zeroout(struct block_device *bdev, fmode_t mode,
		unsigned long arg)
{
	uint64_t range[2];
	uint64_t start, end, len;
	struct inode *inode = bdev->bd_inode;
	int err;

	if (!(mode & FMODE_WRITE))
		return -EBADF;

	if (copy_from_user(range, (void __user *)arg, sizeof(range)))
		return -EFAULT;

	start = range[0];
	len = range[1];
	end = start + len - 1;

	if (start & 511)
		return -EINVAL;
	if (len & 511)
		return -EINVAL;
	if (end >= (uint64_t)i_size_read(bdev->bd_inode))
		return -EINVAL;
	if (end < start)
		return -EINVAL;

	/* Invalidate the page cache, including dirty pages */
	filemap_invalidate_lock(inode->i_mapping);
	err = truncate_bdev_range(bdev, mode, start, end);
	if (err)
		goto fail;

	err = blkdev_issue_zeroout(bdev, start >> 9, len >> 9, GFP_KERNEL,
				   BLKDEV_ZERO_NOUNMAP);

fail:
	filemap_invalidate_unlock(inode->i_mapping);
	return err;
}

static int put_ushort(unsigned short __user *argp, unsigned short val)
{
	return put_user(val, argp);
}

static int put_int(int __user *argp, int val)
{
	return put_user(val, argp);
}

static int put_uint(unsigned int __user *argp, unsigned int val)
{
	return put_user(val, argp);
}

static int put_long(long __user *argp, long val)
{
	return put_user(val, argp);
}

static int put_ulong(unsigned long __user *argp, unsigned long val)
{
	return put_user(val, argp);
}

static int put_u64(u64 __user *argp, u64 val)
{
	return put_user(val, argp);
}

#ifdef CONFIG_COMPAT
static int compat_put_long(compat_long_t __user *argp, long val)
{
	return put_user(val, argp);
}

static int compat_put_ulong(compat_ulong_t __user *argp, compat_ulong_t val)
{
	return put_user(val, argp);
}
#endif

#ifdef CONFIG_COMPAT
/*
 * This is the equivalent of compat_ptr_ioctl(), to be used by block
 * drivers that implement only commands that are completely compatible
 * between 32-bit and 64-bit user space
 */
int blkdev_compat_ptr_ioctl(struct block_device *bdev, fmode_t mode,
			unsigned cmd, unsigned long arg)
{
	struct gendisk *disk = bdev->bd_disk;

	if (disk->fops->ioctl)
		return disk->fops->ioctl(bdev, mode, cmd,
					 (unsigned long)compat_ptr(arg));

	return -ENOIOCTLCMD;
}
EXPORT_SYMBOL(blkdev_compat_ptr_ioctl);
#endif

static int blkdev_pr_register(struct block_device *bdev,
		struct pr_registration __user *arg)
{
	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
	struct pr_registration reg;

	if (!capable(CAP_SYS_ADMIN))
		return -EPERM;
	if (!ops || !ops->pr_register)
		return -EOPNOTSUPP;
	if (copy_from_user(&reg, arg, sizeof(reg)))
		return -EFAULT;

	if (reg.flags & ~PR_FL_IGNORE_KEY)
		return -EOPNOTSUPP;
	return ops->pr_register(bdev, reg.old_key, reg.new_key, reg.flags);
}

static int blkdev_pr_reserve(struct block_device *bdev,
		struct pr_reservation __user *arg)
{
	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
	struct pr_reservation rsv;

	if (!capable(CAP_SYS_ADMIN))
		return -EPERM;
	if (!ops || !ops->pr_reserve)
		return -EOPNOTSUPP;
	if (copy_from_user(&rsv, arg, sizeof(rsv)))
		return -EFAULT;

	if (rsv.flags & ~PR_FL_IGNORE_KEY)
		return -EOPNOTSUPP;
	return ops->pr_reserve(bdev, rsv.key, rsv.type, rsv.flags);
}

static int blkdev_pr_release(struct block_device *bdev,
		struct pr_reservation __user *arg)
{
	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
	struct pr_reservation rsv;

	if (!capable(CAP_SYS_ADMIN))
		return -EPERM;
	if (!ops || !ops->pr_release)
		return -EOPNOTSUPP;
	if (copy_from_user(&rsv, arg, sizeof(rsv)))
		return -EFAULT;

	if (rsv.flags)
		return -EOPNOTSUPP;
	return ops->pr_release(bdev, rsv.key, rsv.type);
}

static int blkdev_pr_preempt(struct block_device *bdev,
		struct pr_preempt __user *arg, bool abort)
{
	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
	struct pr_preempt p;

	if (!capable(CAP_SYS_ADMIN))
		return -EPERM;
	if (!ops || !ops->pr_preempt)
		return -EOPNOTSUPP;
	if (copy_from_user(&p, arg, sizeof(p)))
		return -EFAULT;

	if (p.flags)
		return -EOPNOTSUPP;
	return ops->pr_preempt(bdev, p.old_key, p.new_key, p.type, abort);
}

static int blkdev_pr_clear(struct block_device *bdev,
		struct pr_clear __user *arg)
{
	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
	struct pr_clear c;

	if (!capable(CAP_SYS_ADMIN))
		return -EPERM;
	if (!ops || !ops->pr_clear)
		return -EOPNOTSUPP;
	if (copy_from_user(&c, arg, sizeof(c)))
		return -EFAULT;

	if (c.flags)
		return -EOPNOTSUPP;
	return ops->pr_clear(bdev, c.key);
}

static int blkdev_flushbuf(struct block_device *bdev, fmode_t mode,
		unsigned cmd, unsigned long arg)
{
	if (!capable(CAP_SYS_ADMIN))
		return -EACCES;
	fsync_bdev(bdev);
	invalidate_bdev(bdev);
	return 0;
}

static int blkdev_roset(struct block_device *bdev, fmode_t mode,
		unsigned cmd, unsigned long arg)
{
	int ret, n;

	if (!capable(CAP_SYS_ADMIN))
		return -EACCES;

	if (get_user(n, (int __user *)arg))
		return -EFAULT;
	if (bdev->bd_disk->fops->set_read_only) {
		ret = bdev->bd_disk->fops->set_read_only(bdev, n);
		if (ret)
			return ret;
	}
	bdev->bd_read_only = n;
	return 0;
}

static int blkdev_getgeo(struct block_device *bdev,
		struct hd_geometry __user *argp)
{
	struct gendisk *disk = bdev->bd_disk;
	struct hd_geometry geo;
	int ret;

	if (!argp)
		return -EINVAL;
	if (!disk->fops->getgeo)
		return -ENOTTY;

	/*
	 * We need to set the startsect first, the driver may
	 * want to override it.
	 */
	memset(&geo, 0, sizeof(geo));
	geo.start = get_start_sect(bdev);
	ret = disk->fops->getgeo(bdev, &geo);
	if (ret)
		return ret;
	if (copy_to_user(argp, &geo, sizeof(geo)))
		return -EFAULT;
	return 0;
}

#ifdef CONFIG_COMPAT
struct compat_hd_geometry {
	unsigned char heads;
	unsigned char sectors;
	unsigned short cylinders;
	u32 start;
};

static int compat_hdio_getgeo(struct block_device *bdev,
			      struct compat_hd_geometry __user *ugeo)
{
	struct gendisk *disk = bdev->bd_disk;
	struct hd_geometry geo;
	int ret;

	if (!ugeo)
		return -EINVAL;
	if (!disk->fops->getgeo)
		return -ENOTTY;

	memset(&geo, 0, sizeof(geo));
	/*
	 * We need to set the startsect first, the driver may
	 * want to override it.
	 */
	geo.start = get_start_sect(bdev);
	ret = disk->fops->getgeo(bdev, &geo);
	if (ret)
		return ret;

	ret = copy_to_user(ugeo, &geo, 4);
	ret |= put_user(geo.start, &ugeo->start);
	if (ret)
		ret = -EFAULT;

	return ret;
}
#endif

/* set the logical block size */
static int blkdev_bszset(struct block_device *bdev, fmode_t mode,
		int __user *argp)
{
	int ret, n;

	if (!capable(CAP_SYS_ADMIN))
		return -EACCES;
	if (!argp)
		return -EINVAL;
	if (get_user(n, argp))
		return -EFAULT;

	if (mode & FMODE_EXCL)
		return set_blocksize(bdev, n);

	if (IS_ERR(blkdev_get_by_dev(bdev->bd_dev, mode | FMODE_EXCL, &bdev)))
		return -EBUSY;
	ret = set_blocksize(bdev, n);
	blkdev_put(bdev, mode | FMODE_EXCL);

	return ret;
}

/*
 * Common commands that are handled the same way on native and compat
 * user space. Note the separate arg/argp parameters that are needed
 * to deal with the compat_ptr() conversion.
 */
static int blkdev_common_ioctl(struct block_device *bdev, fmode_t mode,
				unsigned cmd, unsigned long arg, void __user *argp)
{
	unsigned int max_sectors;

	switch (cmd) {
	case BLKFLSBUF:
		return blkdev_flushbuf(bdev, mode, cmd, arg);
	case BLKROSET:
		return blkdev_roset(bdev, mode, cmd, arg);
	case BLKDISCARD:
		return blk_ioctl_discard(bdev, mode, arg, 0);
	case BLKSECDISCARD:
		return blk_ioctl_discard(bdev, mode, arg,
				BLKDEV_DISCARD_SECURE);
	case BLKZEROOUT:
		return blk_ioctl_zeroout(bdev, mode, arg);
	case BLKGETDISKSEQ:
		return put_u64(argp, bdev->bd_disk->diskseq);
	case BLKREPORTZONE:
		return blkdev_report_zones_ioctl(bdev, mode, cmd, arg);
	case BLKRESETZONE:
	case BLKOPENZONE:
	case BLKCLOSEZONE:
	case BLKFINISHZONE:
		return blkdev_zone_mgmt_ioctl(bdev, mode, cmd, arg);
	case BLKGETZONESZ:
		return put_uint(argp, bdev_zone_sectors(bdev));
	case BLKGETNRZONES:
		return put_uint(argp, blkdev_nr_zones(bdev->bd_disk));
	case BLKROGET:
		return put_int(argp, bdev_read_only(bdev) != 0);
	case BLKSSZGET: /* get block device logical block size */
		return put_int(argp, bdev_logical_block_size(bdev));
	case BLKPBSZGET: /* get block device physical block size */
		return put_uint(argp, bdev_physical_block_size(bdev));
	case BLKIOMIN:
		return put_uint(argp, bdev_io_min(bdev));
	case BLKIOOPT:
		return put_uint(argp, bdev_io_opt(bdev));
	case BLKALIGNOFF:
		return put_int(argp, bdev_alignment_offset(bdev));
	case BLKDISCARDZEROES:
		return put_uint(argp, 0);
	case BLKSECTGET:
		max_sectors = min_t(unsigned int, USHRT_MAX,
				    queue_max_sectors(bdev_get_queue(bdev)));
		return put_ushort(argp, max_sectors);
	case BLKROTATIONAL:
		return put_ushort(argp, !blk_queue_nonrot(bdev_get_queue(bdev)));
	case BLKRASET:
	case BLKFRASET:
		if(!capable(CAP_SYS_ADMIN))
			return -EACCES;
		bdev->bd_disk->bdi->ra_pages = (arg * 512) / PAGE_SIZE;
		return 0;
	case BLKRRPART:
		return blkdev_reread_part(bdev, mode);
	case BLKTRACESTART:
	case BLKTRACESTOP:
	case BLKTRACETEARDOWN:
		return blk_trace_ioctl(bdev, cmd, argp);
	case IOC_PR_REGISTER:
		return blkdev_pr_register(bdev, argp);
	case IOC_PR_RESERVE:
		return blkdev_pr_reserve(bdev, argp);
	case IOC_PR_RELEASE:
		return blkdev_pr_release(bdev, argp);
	case IOC_PR_PREEMPT:
		return blkdev_pr_preempt(bdev, argp, false);
	case IOC_PR_PREEMPT_ABORT:
		return blkdev_pr_preempt(bdev, argp, true);
	case IOC_PR_CLEAR:
		return blkdev_pr_clear(bdev, argp);
	default:
		return -ENOIOCTLCMD;
	}
}

/*
 * Always keep this in sync with compat_blkdev_ioctl()
 * to handle all incompatible commands in both functions.
 *
 * New commands must be compatible and go into blkdev_common_ioctl
 */
int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
			unsigned long arg)
{
	int ret;
	loff_t size;
	void __user *argp = (void __user *)arg;

	switch (cmd) {
	/* These need separate implementations for the data structure */
	case HDIO_GETGEO:
		return blkdev_getgeo(bdev, argp);
	case BLKPG:
		return blkpg_ioctl(bdev, argp);

	/* Compat mode returns 32-bit data instead of 'long' */
	case BLKRAGET:
	case BLKFRAGET:
		if (!argp)
			return -EINVAL;
		return put_long(argp,
			(bdev->bd_disk->bdi->ra_pages * PAGE_SIZE) / 512);
	case BLKGETSIZE:
		size = i_size_read(bdev->bd_inode);
		if ((size >> 9) > ~0UL)
			return -EFBIG;
		return put_ulong(argp, size >> 9);

	/* The data is compatible, but the command number is different */
	case BLKBSZGET: /* get block device soft block size (cf. BLKSSZGET) */
		return put_int(argp, block_size(bdev));
	case BLKBSZSET:
		return blkdev_bszset(bdev, mode, argp);
	case BLKGETSIZE64:
		return put_u64(argp, i_size_read(bdev->bd_inode));

	/* Incompatible alignment on i386 */
	case BLKTRACESETUP:
		return blk_trace_ioctl(bdev, cmd, argp);
	default:
		break;
	}

	ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp);
	if (ret != -ENOIOCTLCMD)
		return ret;

	if (!bdev->bd_disk->fops->ioctl)
		return -ENOTTY;
	return bdev->bd_disk->fops->ioctl(bdev, mode, cmd, arg);
}
EXPORT_SYMBOL_GPL(blkdev_ioctl); /* for /dev/raw */

#ifdef CONFIG_COMPAT

#define BLKBSZGET_32		_IOR(0x12, 112, int)
#define BLKBSZSET_32		_IOW(0x12, 113, int)
#define BLKGETSIZE64_32		_IOR(0x12, 114, int)

/* Most of the generic ioctls are handled in the normal fallback path.
   This assumes the blkdev's low level compat_ioctl always returns
   ENOIOCTLCMD for unknown ioctls. */
long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
{
	int ret;
	void __user *argp = compat_ptr(arg);
	struct block_device *bdev = I_BDEV(file->f_mapping->host);
	struct gendisk *disk = bdev->bd_disk;
	fmode_t mode = file->f_mode;
	loff_t size;

	/*
	 * O_NDELAY can be altered using fcntl(.., F_SETFL, ..), so we have
	 * to updated it before every ioctl.
	 */
	if (file->f_flags & O_NDELAY)
		mode |= FMODE_NDELAY;
	else
		mode &= ~FMODE_NDELAY;

	switch (cmd) {
	/* These need separate implementations for the data structure */
	case HDIO_GETGEO:
		return compat_hdio_getgeo(bdev, argp);
	case BLKPG:
		return compat_blkpg_ioctl(bdev, argp);

	/* Compat mode returns 32-bit data instead of 'long' */
	case BLKRAGET:
	case BLKFRAGET:
		if (!argp)
			return -EINVAL;
		return compat_put_long(argp,
			(bdev->bd_disk->bdi->ra_pages * PAGE_SIZE) / 512);
	case BLKGETSIZE:
		size = i_size_read(bdev->bd_inode);
		if ((size >> 9) > ~(compat_ulong_t)0)
			return -EFBIG;
		return compat_put_ulong(argp, size >> 9);

	/* The data is compatible, but the command number is different */
	case BLKBSZGET_32: /* get the logical block size (cf. BLKSSZGET) */
		return put_int(argp, bdev_logical_block_size(bdev));
	case BLKBSZSET_32:
		return blkdev_bszset(bdev, mode, argp);
	case BLKGETSIZE64_32:
		return put_u64(argp, i_size_read(bdev->bd_inode));

	/* Incompatible alignment on i386 */
	case BLKTRACESETUP32:
		return blk_trace_ioctl(bdev, cmd, argp);
	default:
		break;
	}

	ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp);
	if (ret == -ENOIOCTLCMD && disk->fops->compat_ioctl)
		ret = disk->fops->compat_ioctl(bdev, mode, cmd, arg);

	return ret;
}
#endif
Commit	Line	Data
3dcf60bc	1	// SPDX-License-Identifier: GPL-2.0
c59ede7b	2	#include <linux/capability.h>
ee6a129d	3	#include <linux/compat.h>
1da177e4	4	#include <linux/blkdev.h>
d5decd3b	5	#include <linux/export.h>
5a0e3ad6	6	#include <linux/gfp.h>
1da177e4	7	#include <linux/blkpg.h>
a885c8c4	8	#include <linux/hdreg.h>
1da177e4	9	#include <linux/backing-dev.h>
ff01bb48	10	#include <linux/fs.h>
2056a782	11	#include <linux/blktrace_api.h>
bbd3e064	12	#include <linux/pr.h>
7c0f6ba6	13	#include <linux/uaccess.h>
581e2600	14	#include "blk.h"
1da177e4	15
5fb889f5 AB	16	static int blkpg_do_ioctl(struct block_device *bdev,
5fb889f5 AB	17	struct blkpg_partition __user *upart, int op)
1da177e4	18	{
7f6be376	19	struct gendisk *disk = bdev->bd_disk;
1da177e4 LT	20	struct blkpg_partition p;
1da177e4 LT	21	long long start, length;
1da177e4 LT	22
	23	if (!capable(CAP_SYS_ADMIN))
	24	return -EACCES;
5fb889f5	25	if (copy_from_user(&p, upart, sizeof(struct blkpg_partition)))
1da177e4	26	return -EFAULT;
fa01b1e9	27	if (bdev_is_partition(bdev))
1da177e4	28	return -EINVAL;
88e34126	29
fa9156ae CH	30	if (p.pno <= 0)
fa9156ae CH	31	return -EINVAL;
e71bf0d0	32
fa9156ae	33	if (op == BLKPG_DEL_PARTITION)
926fbb16	34	return bdev_del_partition(disk, p.pno);
e71bf0d0	35
fa9156ae CH	36	start = p.start >> SECTOR_SHIFT;
fa9156ae CH	37	length = p.length >> SECTOR_SHIFT;
e71bf0d0	38
fa9156ae CH	39	switch (op) {
	40	case BLKPG_ADD_PARTITION:
	41	/* check if partition is aligned to blocksize */
	42	if (p.start & (bdev_logical_block_size(bdev) - 1))
1da177e4	43	return -EINVAL;
7f6be376	44	return bdev_add_partition(disk, p.pno, start, length);
fa9156ae	45	case BLKPG_RESIZE_PARTITION:
3d2e7989	46	return bdev_resize_partition(disk, p.pno, start, length);
fa9156ae CH	47	default:
fa9156ae CH	48	return -EINVAL;
1da177e4 LT	49	}
	50	}
	51
5fb889f5 AB	52	static int blkpg_ioctl(struct block_device *bdev,
	53	struct blkpg_ioctl_arg __user *arg)
	54	{
	55	struct blkpg_partition __user *udata;
	56	int op;
	57
	58	if (get_user(op, &arg->op) \|\| get_user(udata, &arg->data))
	59	return -EFAULT;
	60
	61	return blkpg_do_ioctl(bdev, udata, op);
	62	}
	63
	64	#ifdef CONFIG_COMPAT
	65	struct compat_blkpg_ioctl_arg {
	66	compat_int_t op;
	67	compat_int_t flags;
	68	compat_int_t datalen;
	69	compat_caddr_t data;
	70	};
	71
	72	static int compat_blkpg_ioctl(struct block_device *bdev,
	73	struct compat_blkpg_ioctl_arg __user *arg)
	74	{
	75	compat_caddr_t udata;
	76	int op;
	77
	78	if (get_user(op, &arg->op) \|\| get_user(udata, &arg->data))
	79	return -EFAULT;
	80
	81	return blkpg_do_ioctl(bdev, compat_ptr(udata), op);
	82	}
	83	#endif
	84
4601b4b1	85	static int blkdev_reread_part(struct block_device *bdev, fmode_t mode)
1da177e4	86	{
4601b4b1	87	struct block_device *tmp;
f0b870df	88
fa01b1e9	89	if (!disk_part_scan_enabled(bdev->bd_disk) \|\| bdev_is_partition(bdev))
1da177e4 LT	90	return -EINVAL;
	91	if (!capable(CAP_SYS_ADMIN))
	92	return -EACCES;
ab4b5705	93	if (bdev->bd_disk->open_partitions)
68e6582e	94	return -EBUSY;
be324177	95
4601b4b1 CH	96	/*
	97	* Reopen the device to revalidate the driver state and force a
	98	* partition rescan.
	99	*/
	100	mode &= ~FMODE_EXCL;
	101	set_bit(GD_NEED_PART_SCAN, &bdev->bd_disk->state);
be324177	102
4601b4b1 CH	103	tmp = blkdev_get_by_dev(bdev->bd_dev, mode, NULL);
	104	if (IS_ERR(tmp))
	105	return PTR_ERR(tmp);
	106	blkdev_put(tmp, mode);
	107	return 0;
1da177e4 LT	108	}
1da177e4 LT	109
d8e4bb81 CH	110	static int blk_ioctl_discard(struct block_device *bdev, fmode_t mode,
d8e4bb81 CH	111	unsigned long arg, unsigned long flags)
d30a2605	112	{
d8e4bb81 CH	113	uint64_t range[2];
d8e4bb81 CH	114	uint64_t start, len;
351499a1	115	struct request_queue *q = bdev_get_queue(bdev);
380621e7	116	struct inode *inode = bdev->bd_inode;
384d87ef	117	int err;
d8e4bb81 CH	118
	119	if (!(mode & FMODE_WRITE))
	120	return -EBADF;
	121
351499a1 DM	122	if (!blk_queue_discard(q))
	123	return -EOPNOTSUPP;
	124
d8e4bb81 CH	125	if (copy_from_user(range, (void __user *)arg, sizeof(range)))
	126	return -EFAULT;
	127
	128	start = range[0];
	129	len = range[1];
8d57a98c	130
d30a2605 DW	131	if (start & 511)
	132	return -EINVAL;
	133	if (len & 511)
	134	return -EINVAL;
d30a2605	135
351499a1	136	if (start + len > i_size_read(bdev->bd_inode))
d30a2605	137	return -EINVAL;
384d87ef	138
380621e7	139	filemap_invalidate_lock(inode->i_mapping);
384d87ef JK	140	err = truncate_bdev_range(bdev, mode, start, start + len - 1);
384d87ef JK	141	if (err)
380621e7	142	goto fail;
384d87ef	143
380621e7 SK	144	err = blkdev_issue_discard(bdev, start >> 9, len >> 9,
	145	GFP_KERNEL, flags);
	146
	147	fail:
	148	filemap_invalidate_unlock(inode->i_mapping);
	149	return err;
d30a2605 DW	150	}
d30a2605 DW	151
d8e4bb81 CH	152	static int blk_ioctl_zeroout(struct block_device *bdev, fmode_t mode,
d8e4bb81 CH	153	unsigned long arg)
66ba32dc	154	{
d8e4bb81	155	uint64_t range[2];
22dd6d35	156	uint64_t start, end, len;
08786ed8	157	struct inode *inode = bdev->bd_inode;
384d87ef	158	int err;
d8e4bb81 CH	159
	160	if (!(mode & FMODE_WRITE))
	161	return -EBADF;
	162
	163	if (copy_from_user(range, (void __user *)arg, sizeof(range)))
	164	return -EFAULT;
	165
	166	start = range[0];
	167	len = range[1];
22dd6d35	168	end = start + len - 1;
d8e4bb81	169
66ba32dc MP	170	if (start & 511)
	171	return -EINVAL;
	172	if (len & 511)
	173	return -EINVAL;
22dd6d35 DW	174	if (end >= (uint64_t)i_size_read(bdev->bd_inode))
	175	return -EINVAL;
	176	if (end < start)
66ba32dc MP	177	return -EINVAL;
66ba32dc MP	178
22dd6d35	179	/* Invalidate the page cache, including dirty pages */
08786ed8	180	filemap_invalidate_lock(inode->i_mapping);
384d87ef JK	181	err = truncate_bdev_range(bdev, mode, start, end);
384d87ef JK	182	if (err)
08786ed8 SK	183	goto fail;
	184
	185	err = blkdev_issue_zeroout(bdev, start >> 9, len >> 9, GFP_KERNEL,
	186	BLKDEV_ZERO_NOUNMAP);
22dd6d35	187
08786ed8 SK	188	fail:
	189	filemap_invalidate_unlock(inode->i_mapping);
	190	return err;
66ba32dc MP	191	}
66ba32dc MP	192
9b81648c	193	static int put_ushort(unsigned short __user *argp, unsigned short val)
1da177e4	194	{
9b81648c	195	return put_user(val, argp);
1da177e4 LT	196	}
1da177e4 LT	197
9b81648c	198	static int put_int(int __user *argp, int val)
1da177e4	199	{
9b81648c	200	return put_user(val, argp);
1da177e4 LT	201	}
1da177e4 LT	202
9b81648c	203	static int put_uint(unsigned int __user *argp, unsigned int val)
ac481c20	204	{
9b81648c	205	return put_user(val, argp);
ac481c20 MP	206	}
ac481c20 MP	207
9b81648c	208	static int put_long(long __user *argp, long val)
1da177e4	209	{
9b81648c	210	return put_user(val, argp);
1da177e4 LT	211	}
1da177e4 LT	212
9b81648c	213	static int put_ulong(unsigned long __user *argp, unsigned long val)
1da177e4	214	{
9b81648c	215	return put_user(val, argp);
1da177e4 LT	216	}
1da177e4 LT	217
9b81648c	218	static int put_u64(u64 __user *argp, u64 val)
1da177e4	219	{
9b81648c	220	return put_user(val, argp);
1da177e4 LT	221	}
1da177e4 LT	222
bdc1ddad	223	#ifdef CONFIG_COMPAT
c8210a57	224	static int compat_put_long(compat_long_t __user *argp, long val)
bdc1ddad	225	{
9b81648c	226	return put_user(val, argp);
bdc1ddad AB	227	}
bdc1ddad AB	228
c8210a57	229	static int compat_put_ulong(compat_ulong_t __user *argp, compat_ulong_t val)
bdc1ddad	230	{
9b81648c	231	return put_user(val, argp);
bdc1ddad AB	232	}
	233	#endif
	234
ee6a129d AB	235	#ifdef CONFIG_COMPAT
	236	/*
	237	* This is the equivalent of compat_ptr_ioctl(), to be used by block
	238	* drivers that implement only commands that are completely compatible
	239	* between 32-bit and 64-bit user space
	240	*/
	241	int blkdev_compat_ptr_ioctl(struct block_device *bdev, fmode_t mode,
	242	unsigned cmd, unsigned long arg)
	243	{
	244	struct gendisk *disk = bdev->bd_disk;
	245
	246	if (disk->fops->ioctl)
	247	return disk->fops->ioctl(bdev, mode, cmd,
	248	(unsigned long)compat_ptr(arg));
	249
	250	return -ENOIOCTLCMD;
	251	}
	252	EXPORT_SYMBOL(blkdev_compat_ptr_ioctl);
	253	#endif
	254
bbd3e064 CH	255	static int blkdev_pr_register(struct block_device *bdev,
	256	struct pr_registration __user *arg)
	257	{
	258	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
	259	struct pr_registration reg;
	260
	261	if (!capable(CAP_SYS_ADMIN))
	262	return -EPERM;
	263	if (!ops \|\| !ops->pr_register)
	264	return -EOPNOTSUPP;
	265	if (copy_from_user(&reg, arg, sizeof(reg)))
	266	return -EFAULT;
	267
	268	if (reg.flags & ~PR_FL_IGNORE_KEY)
	269	return -EOPNOTSUPP;
	270	return ops->pr_register(bdev, reg.old_key, reg.new_key, reg.flags);
	271	}
	272
	273	static int blkdev_pr_reserve(struct block_device *bdev,
	274	struct pr_reservation __user *arg)
	275	{
	276	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
	277	struct pr_reservation rsv;
	278
	279	if (!capable(CAP_SYS_ADMIN))
	280	return -EPERM;
	281	if (!ops \|\| !ops->pr_reserve)
	282	return -EOPNOTSUPP;
	283	if (copy_from_user(&rsv, arg, sizeof(rsv)))
	284	return -EFAULT;
	285
	286	if (rsv.flags & ~PR_FL_IGNORE_KEY)
	287	return -EOPNOTSUPP;
	288	return ops->pr_reserve(bdev, rsv.key, rsv.type, rsv.flags);
	289	}
	290
	291	static int blkdev_pr_release(struct block_device *bdev,
	292	struct pr_reservation __user *arg)
	293	{
	294	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
	295	struct pr_reservation rsv;
	296
	297	if (!capable(CAP_SYS_ADMIN))
	298	return -EPERM;
	299	if (!ops \|\| !ops->pr_release)
	300	return -EOPNOTSUPP;
	301	if (copy_from_user(&rsv, arg, sizeof(rsv)))
	302	return -EFAULT;
	303
	304	if (rsv.flags)
	305	return -EOPNOTSUPP;
	306	return ops->pr_release(bdev, rsv.key, rsv.type);
	307	}
	308
	309	static int blkdev_pr_preempt(struct block_device *bdev,
	310	struct pr_preempt __user *arg, bool abort)
	311	{
	312	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
	313	struct pr_preempt p;
	314
	315	if (!capable(CAP_SYS_ADMIN))
	316	return -EPERM;
	317	if (!ops \|\| !ops->pr_preempt)
	318	return -EOPNOTSUPP;
319	if (copy_from_user(&p, arg, sizeof(p)))
320	return -EFAULT;
321
322	if (p.flags)
323	return -EOPNOTSUPP;
324	return ops->pr_preempt(bdev, p.old_key, p.new_key, p.type, abort);
325	}
326
327	static int blkdev_pr_clear(struct block_device *bdev,
328	struct pr_clear __user *arg)
329	{
330	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
331	struct pr_clear c;
332
333	if (!capable(CAP_SYS_ADMIN))
334	return -EPERM;
335	if (!ops \|\| !ops->pr_clear)
336	return -EOPNOTSUPP;
337	if (copy_from_user(&c, arg, sizeof(c)))
338	return -EFAULT;
339
340	if (c.flags)
341	return -EOPNOTSUPP;
342	return ops->pr_clear(bdev, c.key);
343	}
344
d8e4bb81 CH	345	static int blkdev_flushbuf(struct block_device *bdev, fmode_t mode,
d8e4bb81 CH	346	unsigned cmd, unsigned long arg)
bb93e3a5	347	{
d8e4bb81 CH	348	if (!capable(CAP_SYS_ADMIN))
d8e4bb81 CH	349	return -EACCES;
d8e4bb81 CH	350	fsync_bdev(bdev);
	351	invalidate_bdev(bdev);
	352	return 0;
	353	}
d30a2605	354
d8e4bb81 CH	355	static int blkdev_roset(struct block_device *bdev, fmode_t mode,
	356	unsigned cmd, unsigned long arg)
	357	{
	358	int ret, n;
d30a2605	359
bb749b31 ID	360	if (!capable(CAP_SYS_ADMIN))
	361	return -EACCES;
	362
d8e4bb81 CH	363	if (get_user(n, (int __user *)arg))
d8e4bb81 CH	364	return -EFAULT;
e00adcad CH	365	if (bdev->bd_disk->fops->set_read_only) {
	366	ret = bdev->bd_disk->fops->set_read_only(bdev, n);
	367	if (ret)
	368	return ret;
	369	}
83950d35	370	bdev->bd_read_only = n;
d8e4bb81 CH	371	return 0;
d8e4bb81 CH	372	}
d30a2605	373
d8e4bb81 CH	374	static int blkdev_getgeo(struct block_device *bdev,
	375	struct hd_geometry __user *argp)
	376	{
	377	struct gendisk *disk = bdev->bd_disk;
	378	struct hd_geometry geo;
	379	int ret;
d30a2605	380
d8e4bb81 CH	381	if (!argp)
	382	return -EINVAL;
	383	if (!disk->fops->getgeo)
	384	return -ENOTTY;
	385
	386	/*
	387	* We need to set the startsect first, the driver may
	388	* want to override it.
	389	*/
	390	memset(&geo, 0, sizeof(geo));
	391	geo.start = get_start_sect(bdev);
	392	ret = disk->fops->getgeo(bdev, &geo);
	393	if (ret)
	394	return ret;
	395	if (copy_to_user(argp, &geo, sizeof(geo)))
	396	return -EFAULT;
	397	return 0;
	398	}
66ba32dc	399
bdc1ddad AB	400	#ifdef CONFIG_COMPAT
	401	struct compat_hd_geometry {
	402	unsigned char heads;
	403	unsigned char sectors;
	404	unsigned short cylinders;
	405	u32 start;
	406	};
	407
9b81648c AB	408	static int compat_hdio_getgeo(struct block_device *bdev,
9b81648c AB	409	struct compat_hd_geometry __user *ugeo)
bdc1ddad	410	{
9b81648c	411	struct gendisk *disk = bdev->bd_disk;
bdc1ddad AB	412	struct hd_geometry geo;
	413	int ret;
	414
	415	if (!ugeo)
	416	return -EINVAL;
	417	if (!disk->fops->getgeo)
	418	return -ENOTTY;
	419
	420	memset(&geo, 0, sizeof(geo));
	421	/*
	422	* We need to set the startsect first, the driver may
	423	* want to override it.
	424	*/
	425	geo.start = get_start_sect(bdev);
	426	ret = disk->fops->getgeo(bdev, &geo);
	427	if (ret)
	428	return ret;
	429
	430	ret = copy_to_user(ugeo, &geo, 4);
	431	ret \|= put_user(geo.start, &ugeo->start);
	432	if (ret)
	433	ret = -EFAULT;
	434
	435	return ret;
	436	}
	437	#endif
	438
d8e4bb81 CH	439	/* set the logical block size */
	440	static int blkdev_bszset(struct block_device *bdev, fmode_t mode,
	441	int __user *argp)
	442	{
	443	int ret, n;
66ba32dc	444
d8e4bb81 CH	445	if (!capable(CAP_SYS_ADMIN))
	446	return -EACCES;
	447	if (!argp)
	448	return -EINVAL;
	449	if (get_user(n, argp))
	450	return -EFAULT;
66ba32dc	451
47816282 CH	452	if (mode & FMODE_EXCL)
47816282 CH	453	return set_blocksize(bdev, n);
d30a2605	454
47816282 CH	455	if (IS_ERR(blkdev_get_by_dev(bdev->bd_dev, mode \| FMODE_EXCL, &bdev)))
47816282 CH	456	return -EBUSY;
d8e4bb81	457	ret = set_blocksize(bdev, n);
47816282 CH	458	blkdev_put(bdev, mode \| FMODE_EXCL);
47816282 CH	459
d8e4bb81 CH	460	return ret;
d8e4bb81 CH	461	}
a885c8c4	462
d8e4bb81	463	/*
9b81648c AB	464	* Common commands that are handled the same way on native and compat
	465	* user space. Note the separate arg/argp parameters that are needed
	466	* to deal with the compat_ptr() conversion.
d8e4bb81	467	*/
9b81648c AB	468	static int blkdev_common_ioctl(struct block_device *bdev, fmode_t mode,
9b81648c AB	469	unsigned cmd, unsigned long arg, void __user *argp)
d8e4bb81	470	{
d8e4bb81 CH	471	unsigned int max_sectors;
	472
	473	switch (cmd) {
	474	case BLKFLSBUF:
	475	return blkdev_flushbuf(bdev, mode, cmd, arg);
	476	case BLKROSET:
	477	return blkdev_roset(bdev, mode, cmd, arg);
	478	case BLKDISCARD:
	479	return blk_ioctl_discard(bdev, mode, arg, 0);
	480	case BLKSECDISCARD:
	481	return blk_ioctl_discard(bdev, mode, arg,
	482	BLKDEV_DISCARD_SECURE);
	483	case BLKZEROOUT:
	484	return blk_ioctl_zeroout(bdev, mode, arg);
7957d93b MC	485	case BLKGETDISKSEQ:
7957d93b MC	486	return put_u64(argp, bdev->bd_disk->diskseq);
3ed05a98 ST	487	case BLKREPORTZONE:
	488	return blkdev_report_zones_ioctl(bdev, mode, cmd, arg);
	489	case BLKRESETZONE:
e876df1f AJ	490	case BLKOPENZONE:
	491	case BLKCLOSEZONE:
	492	case BLKFINISHZONE:
	493	return blkdev_zone_mgmt_ioctl(bdev, mode, cmd, arg);
72cd8757	494	case BLKGETZONESZ:
9b81648c	495	return put_uint(argp, bdev_zone_sectors(bdev));
65e4e3ee	496	case BLKGETNRZONES:
9b81648c	497	return put_uint(argp, blkdev_nr_zones(bdev->bd_disk));
45048d09	498	case BLKROGET:
9b81648c	499	return put_int(argp, bdev_read_only(bdev) != 0);
ac481c20	500	case BLKSSZGET: /* get block device logical block size */
9b81648c	501	return put_int(argp, bdev_logical_block_size(bdev));
ac481c20	502	case BLKPBSZGET: /* get block device physical block size */
9b81648c	503	return put_uint(argp, bdev_physical_block_size(bdev));
ac481c20	504	case BLKIOMIN:
9b81648c	505	return put_uint(argp, bdev_io_min(bdev));
ac481c20	506	case BLKIOOPT:
9b81648c	507	return put_uint(argp, bdev_io_opt(bdev));
ac481c20	508	case BLKALIGNOFF:
9b81648c	509	return put_int(argp, bdev_alignment_offset(bdev));
98262f27	510	case BLKDISCARDZEROES:
9b81648c	511	return put_uint(argp, 0);
45048d09	512	case BLKSECTGET:
63f26496 AM	513	max_sectors = min_t(unsigned int, USHRT_MAX,
63f26496 AM	514	queue_max_sectors(bdev_get_queue(bdev)));
9b81648c	515	return put_ushort(argp, max_sectors);
ef00f59c	516	case BLKROTATIONAL:
9b81648c	517	return put_ushort(argp, !blk_queue_nonrot(bdev_get_queue(bdev)));
45048d09 AV	518	case BLKRASET:
	519	case BLKFRASET:
	520	if(!capable(CAP_SYS_ADMIN))
	521	return -EACCES;
a11d7fc2	522	bdev->bd_disk->bdi->ra_pages = (arg * 512) / PAGE_SIZE;
45048d09	523	return 0;
45048d09	524	case BLKRRPART:
4601b4b1	525	return blkdev_reread_part(bdev, mode);
45048d09 AV	526	case BLKTRACESTART:
45048d09 AV	527	case BLKTRACESTOP:
45048d09	528	case BLKTRACETEARDOWN:
d8e4bb81	529	return blk_trace_ioctl(bdev, cmd, argp);
bbd3e064 CH	530	case IOC_PR_REGISTER:
	531	return blkdev_pr_register(bdev, argp);
	532	case IOC_PR_RESERVE:
	533	return blkdev_pr_reserve(bdev, argp);
	534	case IOC_PR_RELEASE:
	535	return blkdev_pr_release(bdev, argp);
	536	case IOC_PR_PREEMPT:
	537	return blkdev_pr_preempt(bdev, argp, false);
	538	case IOC_PR_PREEMPT_ABORT:
	539	return blkdev_pr_preempt(bdev, argp, true);
	540	case IOC_PR_CLEAR:
	541	return blkdev_pr_clear(bdev, argp);
45048d09	542	default:
9b81648c	543	return -ENOIOCTLCMD;
45048d09	544	}
1da177e4	545	}
9b81648c AB	546
	547	/*
	548	* Always keep this in sync with compat_blkdev_ioctl()
	549	* to handle all incompatible commands in both functions.
	550	*
	551	* New commands must be compatible and go into blkdev_common_ioctl
	552	*/
	553	int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
	554	unsigned long arg)
	555	{
	556	int ret;
	557	loff_t size;
	558	void __user argp = (void __user )arg;
	559
	560	switch (cmd) {
	561	/* These need separate implementations for the data structure */
	562	case HDIO_GETGEO:
	563	return blkdev_getgeo(bdev, argp);
	564	case BLKPG:
	565	return blkpg_ioctl(bdev, argp);
	566
	567	/* Compat mode returns 32-bit data instead of 'long' */
	568	case BLKRAGET:
	569	case BLKFRAGET:
	570	if (!argp)
	571	return -EINVAL;
a11d7fc2 CH	572	return put_long(argp,
a11d7fc2 CH	573	(bdev->bd_disk->bdi->ra_pages * PAGE_SIZE) / 512);
9b81648c AB	574	case BLKGETSIZE:
	575	size = i_size_read(bdev->bd_inode);
	576	if ((size >> 9) > ~0UL)
	577	return -EFBIG;
	578	return put_ulong(argp, size >> 9);
	579
	580	/* The data is compatible, but the command number is different */
	581	case BLKBSZGET: /* get block device soft block size (cf. BLKSSZGET) */
	582	return put_int(argp, block_size(bdev));
	583	case BLKBSZSET:
	584	return blkdev_bszset(bdev, mode, argp);
	585	case BLKGETSIZE64:
	586	return put_u64(argp, i_size_read(bdev->bd_inode));
	587
	588	/* Incompatible alignment on i386 */
	589	case BLKTRACESETUP:
	590	return blk_trace_ioctl(bdev, cmd, argp);
	591	default:
	592	break;
	593	}
	594
	595	ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp);
a7cb3d2f CH	596	if (ret != -ENOIOCTLCMD)
a7cb3d2f CH	597	return ret;
9b81648c	598
a7cb3d2f CH	599	if (!bdev->bd_disk->fops->ioctl)
	600	return -ENOTTY;
	601	return bdev->bd_disk->fops->ioctl(bdev, mode, cmd, arg);
9b81648c AB	602	}
9b81648c AB	603	EXPORT_SYMBOL_GPL(blkdev_ioctl); /* for /dev/raw */
bdc1ddad AB	604
bdc1ddad AB	605	#ifdef CONFIG_COMPAT
9b81648c	606
bdc1ddad AB	607	#define BLKBSZGET_32 _IOR(0x12, 112, int)
	608	#define BLKBSZSET_32 _IOW(0x12, 113, int)
	609	#define BLKGETSIZE64_32 _IOR(0x12, 114, int)
	610
	611	/* Most of the generic ioctls are handled in the normal fallback path.
	612	This assumes the blkdev's low level compat_ioctl always returns
	613	ENOIOCTLCMD for unknown ioctls. */
	614	long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
	615	{
9b81648c AB	616	int ret;
9b81648c AB	617	void __user *argp = compat_ptr(arg);
4e7b5671	618	struct block_device *bdev = I_BDEV(file->f_mapping->host);
bdc1ddad AB	619	struct gendisk *disk = bdev->bd_disk;
	620	fmode_t mode = file->f_mode;
	621	loff_t size;
bdc1ddad AB	622
	623	/*
	624	* O_NDELAY can be altered using fcntl(.., F_SETFL, ..), so we have
	625	* to updated it before every ioctl.
	626	*/
	627	if (file->f_flags & O_NDELAY)
	628	mode \|= FMODE_NDELAY;
	629	else
	630	mode &= ~FMODE_NDELAY;
	631
	632	switch (cmd) {
9b81648c	633	/* These need separate implementations for the data structure */
bdc1ddad	634	case HDIO_GETGEO:
9b81648c	635	return compat_hdio_getgeo(bdev, argp);
bdc1ddad	636	case BLKPG:
9b81648c AB	637	return compat_blkpg_ioctl(bdev, argp);
	638
	639	/* Compat mode returns 32-bit data instead of 'long' */
bdc1ddad AB	640	case BLKRAGET:
bdc1ddad AB	641	case BLKFRAGET:
9b81648c	642	if (!argp)
bdc1ddad	643	return -EINVAL;
9b81648c	644	return compat_put_long(argp,
a11d7fc2	645	(bdev->bd_disk->bdi->ra_pages * PAGE_SIZE) / 512);
bdc1ddad AB	646	case BLKGETSIZE:
bdc1ddad AB	647	size = i_size_read(bdev->bd_inode);
1ad7a74d	648	if ((size >> 9) > ~(compat_ulong_t)0)
bdc1ddad	649	return -EFBIG;
9b81648c	650	return compat_put_ulong(argp, size >> 9);
bdc1ddad	651
9b81648c AB	652	/* The data is compatible, but the command number is different */
	653	case BLKBSZGET_32: /* get the logical block size (cf. BLKSSZGET) */
	654	return put_int(argp, bdev_logical_block_size(bdev));
	655	case BLKBSZSET_32:
	656	return blkdev_bszset(bdev, mode, argp);
bdc1ddad	657	case BLKGETSIZE64_32:
9b81648c	658	return put_u64(argp, i_size_read(bdev->bd_inode));
bdc1ddad	659
9b81648c	660	/* Incompatible alignment on i386 */
bdc1ddad	661	case BLKTRACESETUP32:
9b81648c	662	return blk_trace_ioctl(bdev, cmd, argp);
bdc1ddad	663	default:
9b81648c	664	break;
bdc1ddad	665	}
9b81648c AB	666
	667	ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp);
	668	if (ret == -ENOIOCTLCMD && disk->fops->compat_ioctl)
	669	ret = disk->fops->compat_ioctl(bdev, mode, cmd, arg);
	670
	671	return ret;
bdc1ddad AB	672	}
bdc1ddad AB	673	#endif