[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 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 inode *inode = bdev->bd_inode;
	int err;

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

	if (!bdev_max_discard_sectors(bdev))
		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;
	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)bdev_nr_bytes(bdev))
		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, !bdev_nonrot(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:
		if (!capable(CAP_SYS_ADMIN))
			return -EACCES;
		if (bdev_is_partition(bdev))
			return -EINVAL;
		return disk_scan_partitions(bdev->bd_disk, mode & ~FMODE_EXCL);
	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) > ~(compat_ulong_t)0)
			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
d8e4bb81 CH	85	static int blk_ioctl_discard(struct block_device *bdev, fmode_t mode,
d8e4bb81 CH	86	unsigned long arg, unsigned long flags)
d30a2605	87	{
d8e4bb81 CH	88	uint64_t range[2];
d8e4bb81 CH	89	uint64_t start, len;
7607c44c	90	struct inode *inode = bdev->bd_inode;
384d87ef	91	int err;
d8e4bb81 CH	92
	93	if (!(mode & FMODE_WRITE))
	94	return -EBADF;
	95
70200574	96	if (!bdev_max_discard_sectors(bdev))
351499a1 DM	97	return -EOPNOTSUPP;
351499a1 DM	98
d8e4bb81 CH	99	if (copy_from_user(range, (void __user *)arg, sizeof(range)))
	100	return -EFAULT;
	101
	102	start = range[0];
	103	len = range[1];
8d57a98c	104
d30a2605 DW	105	if (start & 511)
	106	return -EINVAL;
	107	if (len & 511)
	108	return -EINVAL;
d30a2605	109
946e9937	110	if (start + len > bdev_nr_bytes(bdev))
d30a2605	111	return -EINVAL;
384d87ef	112
7607c44c	113	filemap_invalidate_lock(inode->i_mapping);
384d87ef JK	114	err = truncate_bdev_range(bdev, mode, start, start + len - 1);
384d87ef JK	115	if (err)
7607c44c SK	116	goto fail;
	117
	118	err = blkdev_issue_discard(bdev, start >> 9, len >> 9,
	119	GFP_KERNEL, flags);
384d87ef	120
7607c44c SK	121	fail:
	122	filemap_invalidate_unlock(inode->i_mapping);
	123	return err;
d30a2605 DW	124	}
d30a2605 DW	125
d8e4bb81 CH	126	static int blk_ioctl_zeroout(struct block_device *bdev, fmode_t mode,
d8e4bb81 CH	127	unsigned long arg)
66ba32dc	128	{
d8e4bb81	129	uint64_t range[2];
22dd6d35	130	uint64_t start, end, len;
35e4c6c1	131	struct inode *inode = bdev->bd_inode;
384d87ef	132	int err;
d8e4bb81 CH	133
	134	if (!(mode & FMODE_WRITE))
	135	return -EBADF;
	136
	137	if (copy_from_user(range, (void __user *)arg, sizeof(range)))
	138	return -EFAULT;
	139
	140	start = range[0];
	141	len = range[1];
22dd6d35	142	end = start + len - 1;
d8e4bb81	143
66ba32dc MP	144	if (start & 511)
	145	return -EINVAL;
	146	if (len & 511)
	147	return -EINVAL;
946e9937	148	if (end >= (uint64_t)bdev_nr_bytes(bdev))
22dd6d35 DW	149	return -EINVAL;
22dd6d35 DW	150	if (end < start)
66ba32dc MP	151	return -EINVAL;
66ba32dc MP	152
22dd6d35	153	/* Invalidate the page cache, including dirty pages */
35e4c6c1	154	filemap_invalidate_lock(inode->i_mapping);
384d87ef JK	155	err = truncate_bdev_range(bdev, mode, start, end);
384d87ef JK	156	if (err)
35e4c6c1 SK	157	goto fail;
	158
	159	err = blkdev_issue_zeroout(bdev, start >> 9, len >> 9, GFP_KERNEL,
	160	BLKDEV_ZERO_NOUNMAP);
22dd6d35	161
35e4c6c1 SK	162	fail:
	163	filemap_invalidate_unlock(inode->i_mapping);
	164	return err;
66ba32dc MP	165	}
66ba32dc MP	166
9b81648c	167	static int put_ushort(unsigned short __user *argp, unsigned short val)
1da177e4	168	{
9b81648c	169	return put_user(val, argp);
1da177e4 LT	170	}
1da177e4 LT	171
9b81648c	172	static int put_int(int __user *argp, int val)
1da177e4	173	{
9b81648c	174	return put_user(val, argp);
1da177e4 LT	175	}
1da177e4 LT	176
9b81648c	177	static int put_uint(unsigned int __user *argp, unsigned int val)
ac481c20	178	{
9b81648c	179	return put_user(val, argp);
ac481c20 MP	180	}
ac481c20 MP	181
9b81648c	182	static int put_long(long __user *argp, long val)
1da177e4	183	{
9b81648c	184	return put_user(val, argp);
1da177e4 LT	185	}
1da177e4 LT	186
9b81648c	187	static int put_ulong(unsigned long __user *argp, unsigned long val)
1da177e4	188	{
9b81648c	189	return put_user(val, argp);
1da177e4 LT	190	}
1da177e4 LT	191
9b81648c	192	static int put_u64(u64 __user *argp, u64 val)
1da177e4	193	{
9b81648c	194	return put_user(val, argp);
1da177e4 LT	195	}
1da177e4 LT	196
bdc1ddad	197	#ifdef CONFIG_COMPAT
c8210a57	198	static int compat_put_long(compat_long_t __user *argp, long val)
bdc1ddad	199	{
9b81648c	200	return put_user(val, argp);
bdc1ddad AB	201	}
bdc1ddad AB	202
c8210a57	203	static int compat_put_ulong(compat_ulong_t __user *argp, compat_ulong_t val)
bdc1ddad	204	{
9b81648c	205	return put_user(val, argp);
bdc1ddad AB	206	}
	207	#endif
	208
ee6a129d AB	209	#ifdef CONFIG_COMPAT
	210	/*
	211	* This is the equivalent of compat_ptr_ioctl(), to be used by block
	212	* drivers that implement only commands that are completely compatible
	213	* between 32-bit and 64-bit user space
	214	*/
	215	int blkdev_compat_ptr_ioctl(struct block_device *bdev, fmode_t mode,
	216	unsigned cmd, unsigned long arg)
	217	{
	218	struct gendisk *disk = bdev->bd_disk;
	219
	220	if (disk->fops->ioctl)
	221	return disk->fops->ioctl(bdev, mode, cmd,
	222	(unsigned long)compat_ptr(arg));
	223
	224	return -ENOIOCTLCMD;
	225	}
	226	EXPORT_SYMBOL(blkdev_compat_ptr_ioctl);
	227	#endif
	228
bbd3e064 CH	229	static int blkdev_pr_register(struct block_device *bdev,
	230	struct pr_registration __user *arg)
	231	{
	232	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
	233	struct pr_registration reg;
	234
	235	if (!capable(CAP_SYS_ADMIN))
	236	return -EPERM;
	237	if (!ops \|\| !ops->pr_register)
	238	return -EOPNOTSUPP;
	239	if (copy_from_user(&reg, arg, sizeof(reg)))
	240	return -EFAULT;
	241
	242	if (reg.flags & ~PR_FL_IGNORE_KEY)
	243	return -EOPNOTSUPP;
	244	return ops->pr_register(bdev, reg.old_key, reg.new_key, reg.flags);
	245	}
	246
	247	static int blkdev_pr_reserve(struct block_device *bdev,
	248	struct pr_reservation __user *arg)
	249	{
	250	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
	251	struct pr_reservation rsv;
	252
	253	if (!capable(CAP_SYS_ADMIN))
	254	return -EPERM;
	255	if (!ops \|\| !ops->pr_reserve)
	256	return -EOPNOTSUPP;
	257	if (copy_from_user(&rsv, arg, sizeof(rsv)))
	258	return -EFAULT;
	259
	260	if (rsv.flags & ~PR_FL_IGNORE_KEY)
	261	return -EOPNOTSUPP;
	262	return ops->pr_reserve(bdev, rsv.key, rsv.type, rsv.flags);
	263	}
	264
	265	static int blkdev_pr_release(struct block_device *bdev,
	266	struct pr_reservation __user *arg)
	267	{
	268	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
	269	struct pr_reservation rsv;
	270
	271	if (!capable(CAP_SYS_ADMIN))
	272	return -EPERM;
	273	if (!ops \|\| !ops->pr_release)
	274	return -EOPNOTSUPP;
	275	if (copy_from_user(&rsv, arg, sizeof(rsv)))
	276	return -EFAULT;
	277
	278	if (rsv.flags)
	279	return -EOPNOTSUPP;
	280	return ops->pr_release(bdev, rsv.key, rsv.type);
	281	}
	282
	283	static int blkdev_pr_preempt(struct block_device *bdev,
	284	struct pr_preempt __user *arg, bool abort)
	285	{
	286	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
	287	struct pr_preempt p;
	288
	289	if (!capable(CAP_SYS_ADMIN))
	290	return -EPERM;
	291	if (!ops \|\| !ops->pr_preempt)
	292	return -EOPNOTSUPP;
293	if (copy_from_user(&p, arg, sizeof(p)))
294	return -EFAULT;
295
296	if (p.flags)
297	return -EOPNOTSUPP;
298	return ops->pr_preempt(bdev, p.old_key, p.new_key, p.type, abort);
299	}
300
301	static int blkdev_pr_clear(struct block_device *bdev,
302	struct pr_clear __user *arg)
303	{
304	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
305	struct pr_clear c;
306
307	if (!capable(CAP_SYS_ADMIN))
308	return -EPERM;
309	if (!ops \|\| !ops->pr_clear)
310	return -EOPNOTSUPP;
311	if (copy_from_user(&c, arg, sizeof(c)))
312	return -EFAULT;
313
314	if (c.flags)
315	return -EOPNOTSUPP;
316	return ops->pr_clear(bdev, c.key);
317	}
318
d8e4bb81 CH	319	static int blkdev_flushbuf(struct block_device *bdev, fmode_t mode,
d8e4bb81 CH	320	unsigned cmd, unsigned long arg)
bb93e3a5	321	{
d8e4bb81 CH	322	if (!capable(CAP_SYS_ADMIN))
d8e4bb81 CH	323	return -EACCES;
d8e4bb81 CH	324	fsync_bdev(bdev);
	325	invalidate_bdev(bdev);
	326	return 0;
	327	}
d30a2605	328
d8e4bb81 CH	329	static int blkdev_roset(struct block_device *bdev, fmode_t mode,
	330	unsigned cmd, unsigned long arg)
	331	{
	332	int ret, n;
d30a2605	333
bb749b31 ID	334	if (!capable(CAP_SYS_ADMIN))
	335	return -EACCES;
	336
d8e4bb81 CH	337	if (get_user(n, (int __user *)arg))
d8e4bb81 CH	338	return -EFAULT;
e00adcad CH	339	if (bdev->bd_disk->fops->set_read_only) {
	340	ret = bdev->bd_disk->fops->set_read_only(bdev, n);
	341	if (ret)
	342	return ret;
	343	}
83950d35	344	bdev->bd_read_only = n;
d8e4bb81 CH	345	return 0;
d8e4bb81 CH	346	}
d30a2605	347
d8e4bb81 CH	348	static int blkdev_getgeo(struct block_device *bdev,
	349	struct hd_geometry __user *argp)
	350	{
	351	struct gendisk *disk = bdev->bd_disk;
	352	struct hd_geometry geo;
	353	int ret;
d30a2605	354
d8e4bb81 CH	355	if (!argp)
	356	return -EINVAL;
	357	if (!disk->fops->getgeo)
	358	return -ENOTTY;
	359
	360	/*
	361	* We need to set the startsect first, the driver may
	362	* want to override it.
	363	*/
	364	memset(&geo, 0, sizeof(geo));
	365	geo.start = get_start_sect(bdev);
	366	ret = disk->fops->getgeo(bdev, &geo);
	367	if (ret)
	368	return ret;
	369	if (copy_to_user(argp, &geo, sizeof(geo)))
	370	return -EFAULT;
	371	return 0;
	372	}
66ba32dc	373
bdc1ddad AB	374	#ifdef CONFIG_COMPAT
	375	struct compat_hd_geometry {
	376	unsigned char heads;
	377	unsigned char sectors;
	378	unsigned short cylinders;
	379	u32 start;
	380	};
	381
9b81648c AB	382	static int compat_hdio_getgeo(struct block_device *bdev,
9b81648c AB	383	struct compat_hd_geometry __user *ugeo)
bdc1ddad	384	{
9b81648c	385	struct gendisk *disk = bdev->bd_disk;
bdc1ddad AB	386	struct hd_geometry geo;
	387	int ret;
	388
	389	if (!ugeo)
	390	return -EINVAL;
	391	if (!disk->fops->getgeo)
	392	return -ENOTTY;
	393
	394	memset(&geo, 0, sizeof(geo));
	395	/*
	396	* We need to set the startsect first, the driver may
	397	* want to override it.
	398	*/
	399	geo.start = get_start_sect(bdev);
	400	ret = disk->fops->getgeo(bdev, &geo);
	401	if (ret)
	402	return ret;
	403
	404	ret = copy_to_user(ugeo, &geo, 4);
	405	ret \|= put_user(geo.start, &ugeo->start);
	406	if (ret)
	407	ret = -EFAULT;
	408
	409	return ret;
	410	}
	411	#endif
	412
d8e4bb81 CH	413	/* set the logical block size */
	414	static int blkdev_bszset(struct block_device *bdev, fmode_t mode,
	415	int __user *argp)
	416	{
	417	int ret, n;
66ba32dc	418
d8e4bb81 CH	419	if (!capable(CAP_SYS_ADMIN))
	420	return -EACCES;
	421	if (!argp)
	422	return -EINVAL;
	423	if (get_user(n, argp))
	424	return -EFAULT;
66ba32dc	425
47816282 CH	426	if (mode & FMODE_EXCL)
47816282 CH	427	return set_blocksize(bdev, n);
d30a2605	428
47816282 CH	429	if (IS_ERR(blkdev_get_by_dev(bdev->bd_dev, mode \| FMODE_EXCL, &bdev)))
47816282 CH	430	return -EBUSY;
d8e4bb81	431	ret = set_blocksize(bdev, n);
47816282 CH	432	blkdev_put(bdev, mode \| FMODE_EXCL);
47816282 CH	433
d8e4bb81 CH	434	return ret;
d8e4bb81 CH	435	}
a885c8c4	436
d8e4bb81	437	/*
9b81648c AB	438	* Common commands that are handled the same way on native and compat
	439	* user space. Note the separate arg/argp parameters that are needed
	440	* to deal with the compat_ptr() conversion.
d8e4bb81	441	*/
9b81648c AB	442	static int blkdev_common_ioctl(struct block_device *bdev, fmode_t mode,
9b81648c AB	443	unsigned cmd, unsigned long arg, void __user *argp)
d8e4bb81	444	{
d8e4bb81 CH	445	unsigned int max_sectors;
	446
	447	switch (cmd) {
	448	case BLKFLSBUF:
	449	return blkdev_flushbuf(bdev, mode, cmd, arg);
	450	case BLKROSET:
	451	return blkdev_roset(bdev, mode, cmd, arg);
	452	case BLKDISCARD:
	453	return blk_ioctl_discard(bdev, mode, arg, 0);
	454	case BLKSECDISCARD:
	455	return blk_ioctl_discard(bdev, mode, arg,
	456	BLKDEV_DISCARD_SECURE);
	457	case BLKZEROOUT:
	458	return blk_ioctl_zeroout(bdev, mode, arg);
7957d93b MC	459	case BLKGETDISKSEQ:
7957d93b MC	460	return put_u64(argp, bdev->bd_disk->diskseq);
3ed05a98 ST	461	case BLKREPORTZONE:
	462	return blkdev_report_zones_ioctl(bdev, mode, cmd, arg);
	463	case BLKRESETZONE:
e876df1f AJ	464	case BLKOPENZONE:
	465	case BLKCLOSEZONE:
	466	case BLKFINISHZONE:
	467	return blkdev_zone_mgmt_ioctl(bdev, mode, cmd, arg);
72cd8757	468	case BLKGETZONESZ:
9b81648c	469	return put_uint(argp, bdev_zone_sectors(bdev));
65e4e3ee	470	case BLKGETNRZONES:
9b81648c	471	return put_uint(argp, blkdev_nr_zones(bdev->bd_disk));
45048d09	472	case BLKROGET:
9b81648c	473	return put_int(argp, bdev_read_only(bdev) != 0);
ac481c20	474	case BLKSSZGET: /* get block device logical block size */
9b81648c	475	return put_int(argp, bdev_logical_block_size(bdev));
ac481c20	476	case BLKPBSZGET: /* get block device physical block size */
9b81648c	477	return put_uint(argp, bdev_physical_block_size(bdev));
ac481c20	478	case BLKIOMIN:
9b81648c	479	return put_uint(argp, bdev_io_min(bdev));
ac481c20	480	case BLKIOOPT:
9b81648c	481	return put_uint(argp, bdev_io_opt(bdev));
ac481c20	482	case BLKALIGNOFF:
9b81648c	483	return put_int(argp, bdev_alignment_offset(bdev));
98262f27	484	case BLKDISCARDZEROES:
9b81648c	485	return put_uint(argp, 0);
45048d09	486	case BLKSECTGET:
63f26496 AM	487	max_sectors = min_t(unsigned int, USHRT_MAX,
63f26496 AM	488	queue_max_sectors(bdev_get_queue(bdev)));
9b81648c	489	return put_ushort(argp, max_sectors);
ef00f59c	490	case BLKROTATIONAL:
10f0d2a5	491	return put_ushort(argp, !bdev_nonrot(bdev));
45048d09 AV	492	case BLKRASET:
	493	case BLKFRASET:
	494	if(!capable(CAP_SYS_ADMIN))
	495	return -EACCES;
a11d7fc2	496	bdev->bd_disk->bdi->ra_pages = (arg * 512) / PAGE_SIZE;
45048d09	497	return 0;
45048d09	498	case BLKRRPART:
e16e506c CH	499	if (!capable(CAP_SYS_ADMIN))
	500	return -EACCES;
	501	if (bdev_is_partition(bdev))
	502	return -EINVAL;
	503	return disk_scan_partitions(bdev->bd_disk, mode & ~FMODE_EXCL);
45048d09 AV	504	case BLKTRACESTART:
45048d09 AV	505	case BLKTRACESTOP:
45048d09	506	case BLKTRACETEARDOWN:
d8e4bb81	507	return blk_trace_ioctl(bdev, cmd, argp);
bbd3e064 CH	508	case IOC_PR_REGISTER:
	509	return blkdev_pr_register(bdev, argp);
	510	case IOC_PR_RESERVE:
	511	return blkdev_pr_reserve(bdev, argp);
	512	case IOC_PR_RELEASE:
	513	return blkdev_pr_release(bdev, argp);
	514	case IOC_PR_PREEMPT:
	515	return blkdev_pr_preempt(bdev, argp, false);
	516	case IOC_PR_PREEMPT_ABORT:
	517	return blkdev_pr_preempt(bdev, argp, true);
	518	case IOC_PR_CLEAR:
	519	return blkdev_pr_clear(bdev, argp);
45048d09	520	default:
9b81648c	521	return -ENOIOCTLCMD;
45048d09	522	}
1da177e4	523	}
9b81648c AB	524
	525	/*
	526	* Always keep this in sync with compat_blkdev_ioctl()
	527	* to handle all incompatible commands in both functions.
	528	*
	529	* New commands must be compatible and go into blkdev_common_ioctl
	530	*/
8a709512	531	long blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
9b81648c	532	{
8a709512	533	struct block_device *bdev = I_BDEV(file->f_mapping->host);
9b81648c	534	void __user argp = (void __user )arg;
8a709512	535	fmode_t mode = file->f_mode;
8a709512 CH	536	int ret;
	537
	538	/*
	539	* O_NDELAY can be altered using fcntl(.., F_SETFL, ..), so we have
	540	* to updated it before every ioctl.
	541	*/
	542	if (file->f_flags & O_NDELAY)
	543	mode \|= FMODE_NDELAY;
	544	else
	545	mode &= ~FMODE_NDELAY;
9b81648c AB	546
	547	switch (cmd) {
	548	/* These need separate implementations for the data structure */
	549	case HDIO_GETGEO:
	550	return blkdev_getgeo(bdev, argp);
	551	case BLKPG:
	552	return blkpg_ioctl(bdev, argp);
	553
	554	/* Compat mode returns 32-bit data instead of 'long' */
	555	case BLKRAGET:
	556	case BLKFRAGET:
	557	if (!argp)
	558	return -EINVAL;
a11d7fc2 CH	559	return put_long(argp,
a11d7fc2 CH	560	(bdev->bd_disk->bdi->ra_pages * PAGE_SIZE) / 512);
9b81648c	561	case BLKGETSIZE:
946e9937	562	if (bdev_nr_sectors(bdev) > ~0UL)
9b81648c	563	return -EFBIG;
946e9937	564	return put_ulong(argp, bdev_nr_sectors(bdev));
9b81648c AB	565
	566	/* The data is compatible, but the command number is different */
	567	case BLKBSZGET: /* get block device soft block size (cf. BLKSSZGET) */
	568	return put_int(argp, block_size(bdev));
	569	case BLKBSZSET:
	570	return blkdev_bszset(bdev, mode, argp);
	571	case BLKGETSIZE64:
946e9937	572	return put_u64(argp, bdev_nr_bytes(bdev));
9b81648c AB	573
	574	/* Incompatible alignment on i386 */
	575	case BLKTRACESETUP:
	576	return blk_trace_ioctl(bdev, cmd, argp);
	577	default:
	578	break;
	579	}
	580
	581	ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp);
a7cb3d2f CH	582	if (ret != -ENOIOCTLCMD)
a7cb3d2f CH	583	return ret;
9b81648c	584
a7cb3d2f CH	585	if (!bdev->bd_disk->fops->ioctl)
	586	return -ENOTTY;
	587	return bdev->bd_disk->fops->ioctl(bdev, mode, cmd, arg);
9b81648c	588	}
bdc1ddad AB	589
bdc1ddad AB	590	#ifdef CONFIG_COMPAT
9b81648c	591
bdc1ddad AB	592	#define BLKBSZGET_32 _IOR(0x12, 112, int)
	593	#define BLKBSZSET_32 _IOW(0x12, 113, int)
	594	#define BLKGETSIZE64_32 _IOR(0x12, 114, int)
	595
	596	/* Most of the generic ioctls are handled in the normal fallback path.
	597	This assumes the blkdev's low level compat_ioctl always returns
	598	ENOIOCTLCMD for unknown ioctls. */
	599	long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
	600	{
9b81648c AB	601	int ret;
9b81648c AB	602	void __user *argp = compat_ptr(arg);
4e7b5671	603	struct block_device *bdev = I_BDEV(file->f_mapping->host);
bdc1ddad AB	604	struct gendisk *disk = bdev->bd_disk;
bdc1ddad AB	605	fmode_t mode = file->f_mode;
bdc1ddad AB	606
	607	/*
	608	* O_NDELAY can be altered using fcntl(.., F_SETFL, ..), so we have
	609	* to updated it before every ioctl.
	610	*/
	611	if (file->f_flags & O_NDELAY)
	612	mode \|= FMODE_NDELAY;
	613	else
	614	mode &= ~FMODE_NDELAY;
	615
	616	switch (cmd) {
9b81648c	617	/* These need separate implementations for the data structure */
bdc1ddad	618	case HDIO_GETGEO:
9b81648c	619	return compat_hdio_getgeo(bdev, argp);
bdc1ddad	620	case BLKPG:
9b81648c AB	621	return compat_blkpg_ioctl(bdev, argp);
	622
	623	/* Compat mode returns 32-bit data instead of 'long' */
bdc1ddad AB	624	case BLKRAGET:
bdc1ddad AB	625	case BLKFRAGET:
9b81648c	626	if (!argp)
bdc1ddad	627	return -EINVAL;
9b81648c	628	return compat_put_long(argp,
a11d7fc2	629	(bdev->bd_disk->bdi->ra_pages * PAGE_SIZE) / 512);
bdc1ddad	630	case BLKGETSIZE:
ccf16413	631	if (bdev_nr_sectors(bdev) > ~(compat_ulong_t)0)
bdc1ddad	632	return -EFBIG;
946e9937	633	return compat_put_ulong(argp, bdev_nr_sectors(bdev));
bdc1ddad	634
9b81648c AB	635	/* The data is compatible, but the command number is different */
	636	case BLKBSZGET_32: /* get the logical block size (cf. BLKSSZGET) */
	637	return put_int(argp, bdev_logical_block_size(bdev));
	638	case BLKBSZSET_32:
	639	return blkdev_bszset(bdev, mode, argp);
bdc1ddad	640	case BLKGETSIZE64_32:
946e9937	641	return put_u64(argp, bdev_nr_bytes(bdev));
bdc1ddad	642
9b81648c	643	/* Incompatible alignment on i386 */
bdc1ddad	644	case BLKTRACESETUP32:
9b81648c	645	return blk_trace_ioctl(bdev, cmd, argp);
bdc1ddad	646	default:
9b81648c	647	break;
bdc1ddad	648	}
9b81648c AB	649
	650	ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp);
	651	if (ret == -ENOIOCTLCMD && disk->fops->compat_ioctl)
	652	ret = disk->fops->compat_ioctl(bdev, mode, cmd, arg);
	653
	654	return ret;
bdc1ddad AB	655	}
bdc1ddad AB	656	#endif