[linux-block.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 > bdev_nr_bytes(bdev))
		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;
	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)bdev_nr_bytes(bdev))
		return -EINVAL;
	if (end < start)
		return -EINVAL;

	/* Invalidate the page cache, including dirty pages */
	err = truncate_bdev_range(bdev, mode, start, end);
	if (err)
		return err;

	return blkdev_issue_zeroout(bdev, start >> 9, len >> 9, GFP_KERNEL,
			BLKDEV_ZERO_NOUNMAP);
}

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
 */
long blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
{
	struct block_device *bdev = I_BDEV(file->f_mapping->host);
	void __user *argp = (void __user *)arg;
	fmode_t mode = file->f_mode;
	int ret;

	/*
	 * 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 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:
		if (bdev_nr_sectors(bdev) > ~0UL)
			return -EFBIG;
		return put_ulong(argp, bdev_nr_sectors(bdev));

	/* 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, bdev_nr_bytes(bdev));

	/* 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);
}

#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;

	/*
	 * 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:
		if (bdev_nr_sectors(bdev) > ~0UL)
			return -EFBIG;
		return compat_put_ulong(argp, bdev_nr_sectors(bdev));

	/* 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, bdev_nr_bytes(bdev));

	/* 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);
7607c44c	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
946e9937	136	if (start + len > bdev_nr_bytes(bdev))
d30a2605	137	return -EINVAL;
384d87ef	138
7607c44c	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)
7607c44c SK	142	goto fail;
	143
	144	err = blkdev_issue_discard(bdev, start >> 9, len >> 9,
	145	GFP_KERNEL, flags);
384d87ef	146
7607c44c SK	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;
384d87ef	157	int err;
d8e4bb81 CH	158
	159	if (!(mode & FMODE_WRITE))
	160	return -EBADF;
	161
	162	if (copy_from_user(range, (void __user *)arg, sizeof(range)))
	163	return -EFAULT;
	164
	165	start = range[0];
	166	len = range[1];
22dd6d35	167	end = start + len - 1;
d8e4bb81	168
66ba32dc MP	169	if (start & 511)
	170	return -EINVAL;
	171	if (len & 511)
	172	return -EINVAL;
946e9937	173	if (end >= (uint64_t)bdev_nr_bytes(bdev))
22dd6d35 DW	174	return -EINVAL;
22dd6d35 DW	175	if (end < start)
66ba32dc MP	176	return -EINVAL;
66ba32dc MP	177
22dd6d35	178	/* Invalidate the page cache, including dirty pages */
384d87ef JK	179	err = truncate_bdev_range(bdev, mode, start, end);
	180	if (err)
	181	return err;
22dd6d35 DW	182
22dd6d35 DW	183	return blkdev_issue_zeroout(bdev, start >> 9, len >> 9, GFP_KERNEL,
ee472d83	184	BLKDEV_ZERO_NOUNMAP);
66ba32dc MP	185	}
66ba32dc MP	186
9b81648c	187	static int put_ushort(unsigned short __user *argp, unsigned short val)
1da177e4	188	{
9b81648c	189	return put_user(val, argp);
1da177e4 LT	190	}
1da177e4 LT	191
9b81648c	192	static int put_int(int __user *argp, int val)
1da177e4	193	{
9b81648c	194	return put_user(val, argp);
1da177e4 LT	195	}
1da177e4 LT	196
9b81648c	197	static int put_uint(unsigned int __user *argp, unsigned int val)
ac481c20	198	{
9b81648c	199	return put_user(val, argp);
ac481c20 MP	200	}
ac481c20 MP	201
9b81648c	202	static int put_long(long __user *argp, long val)
1da177e4	203	{
9b81648c	204	return put_user(val, argp);
1da177e4 LT	205	}
1da177e4 LT	206
9b81648c	207	static int put_ulong(unsigned long __user *argp, unsigned long val)
1da177e4	208	{
9b81648c	209	return put_user(val, argp);
1da177e4 LT	210	}
1da177e4 LT	211
9b81648c	212	static int put_u64(u64 __user *argp, u64 val)
1da177e4	213	{
9b81648c	214	return put_user(val, argp);
1da177e4 LT	215	}
1da177e4 LT	216
bdc1ddad	217	#ifdef CONFIG_COMPAT
c8210a57	218	static int compat_put_long(compat_long_t __user *argp, long val)
bdc1ddad	219	{
9b81648c	220	return put_user(val, argp);
bdc1ddad AB	221	}
bdc1ddad AB	222
c8210a57	223	static int compat_put_ulong(compat_ulong_t __user *argp, compat_ulong_t val)
bdc1ddad	224	{
9b81648c	225	return put_user(val, argp);
bdc1ddad AB	226	}
	227	#endif
	228
ee6a129d AB	229	#ifdef CONFIG_COMPAT
	230	/*
	231	* This is the equivalent of compat_ptr_ioctl(), to be used by block
	232	* drivers that implement only commands that are completely compatible
	233	* between 32-bit and 64-bit user space
	234	*/
	235	int blkdev_compat_ptr_ioctl(struct block_device *bdev, fmode_t mode,
	236	unsigned cmd, unsigned long arg)
	237	{
	238	struct gendisk *disk = bdev->bd_disk;
	239
	240	if (disk->fops->ioctl)
	241	return disk->fops->ioctl(bdev, mode, cmd,
	242	(unsigned long)compat_ptr(arg));
	243
	244	return -ENOIOCTLCMD;
	245	}
	246	EXPORT_SYMBOL(blkdev_compat_ptr_ioctl);
	247	#endif
	248
bbd3e064 CH	249	static int blkdev_pr_register(struct block_device *bdev,
	250	struct pr_registration __user *arg)
	251	{
	252	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
	253	struct pr_registration reg;
	254
	255	if (!capable(CAP_SYS_ADMIN))
	256	return -EPERM;
	257	if (!ops \|\| !ops->pr_register)
	258	return -EOPNOTSUPP;
	259	if (copy_from_user(&reg, arg, sizeof(reg)))
	260	return -EFAULT;
	261
	262	if (reg.flags & ~PR_FL_IGNORE_KEY)
	263	return -EOPNOTSUPP;
	264	return ops->pr_register(bdev, reg.old_key, reg.new_key, reg.flags);
	265	}
	266
	267	static int blkdev_pr_reserve(struct block_device *bdev,
	268	struct pr_reservation __user *arg)
	269	{
	270	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
	271	struct pr_reservation rsv;
	272
	273	if (!capable(CAP_SYS_ADMIN))
	274	return -EPERM;
	275	if (!ops \|\| !ops->pr_reserve)
	276	return -EOPNOTSUPP;
	277	if (copy_from_user(&rsv, arg, sizeof(rsv)))
	278	return -EFAULT;
	279
	280	if (rsv.flags & ~PR_FL_IGNORE_KEY)
	281	return -EOPNOTSUPP;
	282	return ops->pr_reserve(bdev, rsv.key, rsv.type, rsv.flags);
	283	}
	284
	285	static int blkdev_pr_release(struct block_device *bdev,
	286	struct pr_reservation __user *arg)
	287	{
	288	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
	289	struct pr_reservation rsv;
	290
	291	if (!capable(CAP_SYS_ADMIN))
	292	return -EPERM;
	293	if (!ops \|\| !ops->pr_release)
	294	return -EOPNOTSUPP;
	295	if (copy_from_user(&rsv, arg, sizeof(rsv)))
	296	return -EFAULT;
	297
	298	if (rsv.flags)
	299	return -EOPNOTSUPP;
	300	return ops->pr_release(bdev, rsv.key, rsv.type);
	301	}
	302
	303	static int blkdev_pr_preempt(struct block_device *bdev,
	304	struct pr_preempt __user *arg, bool abort)
	305	{
	306	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
	307	struct pr_preempt p;
	308
	309	if (!capable(CAP_SYS_ADMIN))
	310	return -EPERM;
	311	if (!ops \|\| !ops->pr_preempt)
	312	return -EOPNOTSUPP;
313	if (copy_from_user(&p, arg, sizeof(p)))
314	return -EFAULT;
315
316	if (p.flags)
317	return -EOPNOTSUPP;
318	return ops->pr_preempt(bdev, p.old_key, p.new_key, p.type, abort);
319	}
320
321	static int blkdev_pr_clear(struct block_device *bdev,
322	struct pr_clear __user *arg)
323	{
324	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
325	struct pr_clear c;
326
327	if (!capable(CAP_SYS_ADMIN))
328	return -EPERM;
329	if (!ops \|\| !ops->pr_clear)
330	return -EOPNOTSUPP;
331	if (copy_from_user(&c, arg, sizeof(c)))
332	return -EFAULT;
333
334	if (c.flags)
335	return -EOPNOTSUPP;
336	return ops->pr_clear(bdev, c.key);
337	}
338
d8e4bb81 CH	339	static int blkdev_flushbuf(struct block_device *bdev, fmode_t mode,
d8e4bb81 CH	340	unsigned cmd, unsigned long arg)
bb93e3a5	341	{
d8e4bb81 CH	342	if (!capable(CAP_SYS_ADMIN))
d8e4bb81 CH	343	return -EACCES;
d8e4bb81 CH	344	fsync_bdev(bdev);
	345	invalidate_bdev(bdev);
	346	return 0;
	347	}
d30a2605	348
d8e4bb81 CH	349	static int blkdev_roset(struct block_device *bdev, fmode_t mode,
	350	unsigned cmd, unsigned long arg)
	351	{
	352	int ret, n;
d30a2605	353
bb749b31 ID	354	if (!capable(CAP_SYS_ADMIN))
	355	return -EACCES;
	356
d8e4bb81 CH	357	if (get_user(n, (int __user *)arg))
d8e4bb81 CH	358	return -EFAULT;
e00adcad CH	359	if (bdev->bd_disk->fops->set_read_only) {
	360	ret = bdev->bd_disk->fops->set_read_only(bdev, n);
	361	if (ret)
	362	return ret;
	363	}
83950d35	364	bdev->bd_read_only = n;
d8e4bb81 CH	365	return 0;
d8e4bb81 CH	366	}
d30a2605	367
d8e4bb81 CH	368	static int blkdev_getgeo(struct block_device *bdev,
	369	struct hd_geometry __user *argp)
	370	{
	371	struct gendisk *disk = bdev->bd_disk;
	372	struct hd_geometry geo;
	373	int ret;
d30a2605	374
d8e4bb81 CH	375	if (!argp)
	376	return -EINVAL;
	377	if (!disk->fops->getgeo)
	378	return -ENOTTY;
	379
	380	/*
	381	* We need to set the startsect first, the driver may
	382	* want to override it.
	383	*/
	384	memset(&geo, 0, sizeof(geo));
	385	geo.start = get_start_sect(bdev);
	386	ret = disk->fops->getgeo(bdev, &geo);
	387	if (ret)
	388	return ret;
	389	if (copy_to_user(argp, &geo, sizeof(geo)))
	390	return -EFAULT;
	391	return 0;
	392	}
66ba32dc	393
bdc1ddad AB	394	#ifdef CONFIG_COMPAT
	395	struct compat_hd_geometry {
	396	unsigned char heads;
	397	unsigned char sectors;
	398	unsigned short cylinders;
	399	u32 start;
	400	};
	401
9b81648c AB	402	static int compat_hdio_getgeo(struct block_device *bdev,
9b81648c AB	403	struct compat_hd_geometry __user *ugeo)
bdc1ddad	404	{
9b81648c	405	struct gendisk *disk = bdev->bd_disk;
bdc1ddad AB	406	struct hd_geometry geo;
	407	int ret;
	408
	409	if (!ugeo)
	410	return -EINVAL;
	411	if (!disk->fops->getgeo)
	412	return -ENOTTY;
	413
	414	memset(&geo, 0, sizeof(geo));
	415	/*
	416	* We need to set the startsect first, the driver may
	417	* want to override it.
	418	*/
	419	geo.start = get_start_sect(bdev);
	420	ret = disk->fops->getgeo(bdev, &geo);
	421	if (ret)
	422	return ret;
	423
	424	ret = copy_to_user(ugeo, &geo, 4);
	425	ret \|= put_user(geo.start, &ugeo->start);
	426	if (ret)
	427	ret = -EFAULT;
	428
	429	return ret;
	430	}
	431	#endif
	432
d8e4bb81 CH	433	/* set the logical block size */
	434	static int blkdev_bszset(struct block_device *bdev, fmode_t mode,
	435	int __user *argp)
	436	{
	437	int ret, n;
66ba32dc	438
d8e4bb81 CH	439	if (!capable(CAP_SYS_ADMIN))
	440	return -EACCES;
	441	if (!argp)
	442	return -EINVAL;
	443	if (get_user(n, argp))
	444	return -EFAULT;
66ba32dc	445
47816282 CH	446	if (mode & FMODE_EXCL)
47816282 CH	447	return set_blocksize(bdev, n);
d30a2605	448
47816282 CH	449	if (IS_ERR(blkdev_get_by_dev(bdev->bd_dev, mode \| FMODE_EXCL, &bdev)))
47816282 CH	450	return -EBUSY;
d8e4bb81	451	ret = set_blocksize(bdev, n);
47816282 CH	452	blkdev_put(bdev, mode \| FMODE_EXCL);
47816282 CH	453
d8e4bb81 CH	454	return ret;
d8e4bb81 CH	455	}
a885c8c4	456
d8e4bb81	457	/*
9b81648c AB	458	* Common commands that are handled the same way on native and compat
	459	* user space. Note the separate arg/argp parameters that are needed
	460	* to deal with the compat_ptr() conversion.
d8e4bb81	461	*/
9b81648c AB	462	static int blkdev_common_ioctl(struct block_device *bdev, fmode_t mode,
9b81648c AB	463	unsigned cmd, unsigned long arg, void __user *argp)
d8e4bb81	464	{
d8e4bb81 CH	465	unsigned int max_sectors;
	466
	467	switch (cmd) {
	468	case BLKFLSBUF:
	469	return blkdev_flushbuf(bdev, mode, cmd, arg);
	470	case BLKROSET:
	471	return blkdev_roset(bdev, mode, cmd, arg);
	472	case BLKDISCARD:
	473	return blk_ioctl_discard(bdev, mode, arg, 0);
	474	case BLKSECDISCARD:
	475	return blk_ioctl_discard(bdev, mode, arg,
	476	BLKDEV_DISCARD_SECURE);
	477	case BLKZEROOUT:
	478	return blk_ioctl_zeroout(bdev, mode, arg);
7957d93b MC	479	case BLKGETDISKSEQ:
7957d93b MC	480	return put_u64(argp, bdev->bd_disk->diskseq);
3ed05a98 ST	481	case BLKREPORTZONE:
	482	return blkdev_report_zones_ioctl(bdev, mode, cmd, arg);
	483	case BLKRESETZONE:
e876df1f AJ	484	case BLKOPENZONE:
	485	case BLKCLOSEZONE:
	486	case BLKFINISHZONE:
	487	return blkdev_zone_mgmt_ioctl(bdev, mode, cmd, arg);
72cd8757	488	case BLKGETZONESZ:
9b81648c	489	return put_uint(argp, bdev_zone_sectors(bdev));
65e4e3ee	490	case BLKGETNRZONES:
9b81648c	491	return put_uint(argp, blkdev_nr_zones(bdev->bd_disk));
45048d09	492	case BLKROGET:
9b81648c	493	return put_int(argp, bdev_read_only(bdev) != 0);
ac481c20	494	case BLKSSZGET: /* get block device logical block size */
9b81648c	495	return put_int(argp, bdev_logical_block_size(bdev));
ac481c20	496	case BLKPBSZGET: /* get block device physical block size */
9b81648c	497	return put_uint(argp, bdev_physical_block_size(bdev));
ac481c20	498	case BLKIOMIN:
9b81648c	499	return put_uint(argp, bdev_io_min(bdev));
ac481c20	500	case BLKIOOPT:
9b81648c	501	return put_uint(argp, bdev_io_opt(bdev));
ac481c20	502	case BLKALIGNOFF:
9b81648c	503	return put_int(argp, bdev_alignment_offset(bdev));
98262f27	504	case BLKDISCARDZEROES:
9b81648c	505	return put_uint(argp, 0);
45048d09	506	case BLKSECTGET:
63f26496 AM	507	max_sectors = min_t(unsigned int, USHRT_MAX,
63f26496 AM	508	queue_max_sectors(bdev_get_queue(bdev)));
9b81648c	509	return put_ushort(argp, max_sectors);
ef00f59c	510	case BLKROTATIONAL:
9b81648c	511	return put_ushort(argp, !blk_queue_nonrot(bdev_get_queue(bdev)));
45048d09 AV	512	case BLKRASET:
	513	case BLKFRASET:
	514	if(!capable(CAP_SYS_ADMIN))
	515	return -EACCES;
a11d7fc2	516	bdev->bd_disk->bdi->ra_pages = (arg * 512) / PAGE_SIZE;
45048d09	517	return 0;
45048d09	518	case BLKRRPART:
4601b4b1	519	return blkdev_reread_part(bdev, mode);
45048d09 AV	520	case BLKTRACESTART:
45048d09 AV	521	case BLKTRACESTOP:
45048d09	522	case BLKTRACETEARDOWN:
d8e4bb81	523	return blk_trace_ioctl(bdev, cmd, argp);
bbd3e064 CH	524	case IOC_PR_REGISTER:
	525	return blkdev_pr_register(bdev, argp);
	526	case IOC_PR_RESERVE:
	527	return blkdev_pr_reserve(bdev, argp);
	528	case IOC_PR_RELEASE:
	529	return blkdev_pr_release(bdev, argp);
	530	case IOC_PR_PREEMPT:
	531	return blkdev_pr_preempt(bdev, argp, false);
	532	case IOC_PR_PREEMPT_ABORT:
	533	return blkdev_pr_preempt(bdev, argp, true);
	534	case IOC_PR_CLEAR:
	535	return blkdev_pr_clear(bdev, argp);
45048d09	536	default:
9b81648c	537	return -ENOIOCTLCMD;
45048d09	538	}
1da177e4	539	}
9b81648c AB	540
	541	/*
	542	* Always keep this in sync with compat_blkdev_ioctl()
	543	* to handle all incompatible commands in both functions.
	544	*
	545	* New commands must be compatible and go into blkdev_common_ioctl
	546	*/
8a709512	547	long blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
9b81648c	548	{
8a709512	549	struct block_device *bdev = I_BDEV(file->f_mapping->host);
9b81648c	550	void __user argp = (void __user )arg;
8a709512	551	fmode_t mode = file->f_mode;
8a709512 CH	552	int ret;
	553
	554	/*
	555	* O_NDELAY can be altered using fcntl(.., F_SETFL, ..), so we have
	556	* to updated it before every ioctl.
	557	*/
	558	if (file->f_flags & O_NDELAY)
	559	mode \|= FMODE_NDELAY;
	560	else
	561	mode &= ~FMODE_NDELAY;
9b81648c AB	562
	563	switch (cmd) {
	564	/* These need separate implementations for the data structure */
	565	case HDIO_GETGEO:
	566	return blkdev_getgeo(bdev, argp);
	567	case BLKPG:
	568	return blkpg_ioctl(bdev, argp);
	569
	570	/* Compat mode returns 32-bit data instead of 'long' */
	571	case BLKRAGET:
	572	case BLKFRAGET:
	573	if (!argp)
	574	return -EINVAL;
a11d7fc2 CH	575	return put_long(argp,
a11d7fc2 CH	576	(bdev->bd_disk->bdi->ra_pages * PAGE_SIZE) / 512);
9b81648c	577	case BLKGETSIZE:
946e9937	578	if (bdev_nr_sectors(bdev) > ~0UL)
9b81648c	579	return -EFBIG;
946e9937	580	return put_ulong(argp, bdev_nr_sectors(bdev));
9b81648c AB	581
	582	/* The data is compatible, but the command number is different */
	583	case BLKBSZGET: /* get block device soft block size (cf. BLKSSZGET) */
	584	return put_int(argp, block_size(bdev));
	585	case BLKBSZSET:
	586	return blkdev_bszset(bdev, mode, argp);
	587	case BLKGETSIZE64:
946e9937	588	return put_u64(argp, bdev_nr_bytes(bdev));
9b81648c AB	589
	590	/* Incompatible alignment on i386 */
	591	case BLKTRACESETUP:
	592	return blk_trace_ioctl(bdev, cmd, argp);
	593	default:
	594	break;
	595	}
	596
	597	ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp);
a7cb3d2f CH	598	if (ret != -ENOIOCTLCMD)
a7cb3d2f CH	599	return ret;
9b81648c	600
a7cb3d2f CH	601	if (!bdev->bd_disk->fops->ioctl)
	602	return -ENOTTY;
	603	return bdev->bd_disk->fops->ioctl(bdev, mode, cmd, arg);
9b81648c	604	}
bdc1ddad AB	605
bdc1ddad AB	606	#ifdef CONFIG_COMPAT
9b81648c	607
bdc1ddad AB	608	#define BLKBSZGET_32 _IOR(0x12, 112, int)
	609	#define BLKBSZSET_32 _IOW(0x12, 113, int)
	610	#define BLKGETSIZE64_32 _IOR(0x12, 114, int)
	611
	612	/* Most of the generic ioctls are handled in the normal fallback path.
	613	This assumes the blkdev's low level compat_ioctl always returns
	614	ENOIOCTLCMD for unknown ioctls. */
	615	long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
	616	{
9b81648c AB	617	int ret;
9b81648c AB	618	void __user *argp = compat_ptr(arg);
4e7b5671	619	struct block_device *bdev = I_BDEV(file->f_mapping->host);
bdc1ddad AB	620	struct gendisk *disk = bdev->bd_disk;
bdc1ddad AB	621	fmode_t mode = file->f_mode;
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	646	case BLKGETSIZE:
946e9937	647	if (bdev_nr_sectors(bdev) > ~0UL)
bdc1ddad	648	return -EFBIG;
946e9937	649	return compat_put_ulong(argp, bdev_nr_sectors(bdev));
bdc1ddad	650
9b81648c AB	651	/* The data is compatible, but the command number is different */
	652	case BLKBSZGET_32: /* get the logical block size (cf. BLKSSZGET) */
	653	return put_int(argp, bdev_logical_block_size(bdev));
	654	case BLKBSZSET_32:
	655	return blkdev_bszset(bdev, mode, argp);
bdc1ddad	656	case BLKGETSIZE64_32:
946e9937	657	return put_u64(argp, bdev_nr_bytes(bdev));
bdc1ddad	658
9b81648c	659	/* Incompatible alignment on i386 */
bdc1ddad	660	case BLKTRACESETUP32:
9b81648c	661	return blk_trace_ioctl(bdev, cmd, argp);
bdc1ddad	662	default:
9b81648c	663	break;
bdc1ddad	664	}
9b81648c AB	665
	666	ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp);
	667	if (ret == -ENOIOCTLCMD && disk->fops->compat_ioctl)
	668	ret = disk->fops->compat_ioctl(bdev, mode, cmd, arg);
	669
	670	return ret;
bdc1ddad AB	671	}
bdc1ddad AB	672	#endif