[linux.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 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;
	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, !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:
		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) > ~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
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;
351499a1	90	struct request_queue *q = bdev_get_queue(bdev);
7607c44c	91	struct inode *inode = bdev->bd_inode;
384d87ef	92	int err;
d8e4bb81 CH	93
	94	if (!(mode & FMODE_WRITE))
	95	return -EBADF;
	96
351499a1 DM	97	if (!blk_queue_discard(q))
	98	return -EOPNOTSUPP;
	99
d8e4bb81 CH	100	if (copy_from_user(range, (void __user *)arg, sizeof(range)))
	101	return -EFAULT;
	102
	103	start = range[0];
	104	len = range[1];
8d57a98c	105
d30a2605 DW	106	if (start & 511)
	107	return -EINVAL;
	108	if (len & 511)
	109	return -EINVAL;
d30a2605	110
946e9937	111	if (start + len > bdev_nr_bytes(bdev))
d30a2605	112	return -EINVAL;
384d87ef	113
7607c44c	114	filemap_invalidate_lock(inode->i_mapping);
384d87ef JK	115	err = truncate_bdev_range(bdev, mode, start, start + len - 1);
384d87ef JK	116	if (err)
7607c44c SK	117	goto fail;
	118
	119	err = blkdev_issue_discard(bdev, start >> 9, len >> 9,
	120	GFP_KERNEL, flags);
384d87ef	121
7607c44c SK	122	fail:
	123	filemap_invalidate_unlock(inode->i_mapping);
	124	return err;
d30a2605 DW	125	}
d30a2605 DW	126
d8e4bb81 CH	127	static int blk_ioctl_zeroout(struct block_device *bdev, fmode_t mode,
d8e4bb81 CH	128	unsigned long arg)
66ba32dc	129	{
d8e4bb81	130	uint64_t range[2];
22dd6d35	131	uint64_t start, end, len;
35e4c6c1	132	struct inode *inode = bdev->bd_inode;
384d87ef	133	int err;
d8e4bb81 CH	134
	135	if (!(mode & FMODE_WRITE))
	136	return -EBADF;
	137
	138	if (copy_from_user(range, (void __user *)arg, sizeof(range)))
	139	return -EFAULT;
	140
	141	start = range[0];
	142	len = range[1];
22dd6d35	143	end = start + len - 1;
d8e4bb81	144
66ba32dc MP	145	if (start & 511)
	146	return -EINVAL;
	147	if (len & 511)
	148	return -EINVAL;
946e9937	149	if (end >= (uint64_t)bdev_nr_bytes(bdev))
22dd6d35 DW	150	return -EINVAL;
22dd6d35 DW	151	if (end < start)
66ba32dc MP	152	return -EINVAL;
66ba32dc MP	153
22dd6d35	154	/* Invalidate the page cache, including dirty pages */
35e4c6c1	155	filemap_invalidate_lock(inode->i_mapping);
384d87ef JK	156	err = truncate_bdev_range(bdev, mode, start, end);
384d87ef JK	157	if (err)
35e4c6c1 SK	158	goto fail;
	159
	160	err = blkdev_issue_zeroout(bdev, start >> 9, len >> 9, GFP_KERNEL,
	161	BLKDEV_ZERO_NOUNMAP);
22dd6d35	162
35e4c6c1 SK	163	fail:
	164	filemap_invalidate_unlock(inode->i_mapping);
	165	return err;
66ba32dc MP	166	}
66ba32dc MP	167
9b81648c	168	static int put_ushort(unsigned short __user *argp, unsigned short val)
1da177e4	169	{
9b81648c	170	return put_user(val, argp);
1da177e4 LT	171	}
1da177e4 LT	172
9b81648c	173	static int put_int(int __user *argp, int val)
1da177e4	174	{
9b81648c	175	return put_user(val, argp);
1da177e4 LT	176	}
1da177e4 LT	177
9b81648c	178	static int put_uint(unsigned int __user *argp, unsigned int val)
ac481c20	179	{
9b81648c	180	return put_user(val, argp);
ac481c20 MP	181	}
ac481c20 MP	182
9b81648c	183	static int put_long(long __user *argp, long val)
1da177e4	184	{
9b81648c	185	return put_user(val, argp);
1da177e4 LT	186	}
1da177e4 LT	187
9b81648c	188	static int put_ulong(unsigned long __user *argp, unsigned long val)
1da177e4	189	{
9b81648c	190	return put_user(val, argp);
1da177e4 LT	191	}
1da177e4 LT	192
9b81648c	193	static int put_u64(u64 __user *argp, u64 val)
1da177e4	194	{
9b81648c	195	return put_user(val, argp);
1da177e4 LT	196	}
1da177e4 LT	197
bdc1ddad	198	#ifdef CONFIG_COMPAT
c8210a57	199	static int compat_put_long(compat_long_t __user *argp, long val)
bdc1ddad	200	{
9b81648c	201	return put_user(val, argp);
bdc1ddad AB	202	}
bdc1ddad AB	203
c8210a57	204	static int compat_put_ulong(compat_ulong_t __user *argp, compat_ulong_t val)
bdc1ddad	205	{
9b81648c	206	return put_user(val, argp);
bdc1ddad AB	207	}
	208	#endif
	209
ee6a129d AB	210	#ifdef CONFIG_COMPAT
	211	/*
	212	* This is the equivalent of compat_ptr_ioctl(), to be used by block
	213	* drivers that implement only commands that are completely compatible
	214	* between 32-bit and 64-bit user space
	215	*/
	216	int blkdev_compat_ptr_ioctl(struct block_device *bdev, fmode_t mode,
	217	unsigned cmd, unsigned long arg)
	218	{
	219	struct gendisk *disk = bdev->bd_disk;
	220
	221	if (disk->fops->ioctl)
	222	return disk->fops->ioctl(bdev, mode, cmd,
	223	(unsigned long)compat_ptr(arg));
	224
	225	return -ENOIOCTLCMD;
	226	}
	227	EXPORT_SYMBOL(blkdev_compat_ptr_ioctl);
	228	#endif
	229
bbd3e064 CH	230	static int blkdev_pr_register(struct block_device *bdev,
	231	struct pr_registration __user *arg)
	232	{
	233	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
	234	struct pr_registration reg;
	235
	236	if (!capable(CAP_SYS_ADMIN))
	237	return -EPERM;
	238	if (!ops \|\| !ops->pr_register)
	239	return -EOPNOTSUPP;
	240	if (copy_from_user(&reg, arg, sizeof(reg)))
	241	return -EFAULT;
	242
	243	if (reg.flags & ~PR_FL_IGNORE_KEY)
	244	return -EOPNOTSUPP;
	245	return ops->pr_register(bdev, reg.old_key, reg.new_key, reg.flags);
	246	}
	247
	248	static int blkdev_pr_reserve(struct block_device *bdev,
	249	struct pr_reservation __user *arg)
	250	{
	251	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
	252	struct pr_reservation rsv;
	253
	254	if (!capable(CAP_SYS_ADMIN))
	255	return -EPERM;
	256	if (!ops \|\| !ops->pr_reserve)
	257	return -EOPNOTSUPP;
	258	if (copy_from_user(&rsv, arg, sizeof(rsv)))
	259	return -EFAULT;
	260
	261	if (rsv.flags & ~PR_FL_IGNORE_KEY)
	262	return -EOPNOTSUPP;
	263	return ops->pr_reserve(bdev, rsv.key, rsv.type, rsv.flags);
	264	}
	265
	266	static int blkdev_pr_release(struct block_device *bdev,
	267	struct pr_reservation __user *arg)
	268	{
	269	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
	270	struct pr_reservation rsv;
	271
	272	if (!capable(CAP_SYS_ADMIN))
	273	return -EPERM;
	274	if (!ops \|\| !ops->pr_release)
	275	return -EOPNOTSUPP;
	276	if (copy_from_user(&rsv, arg, sizeof(rsv)))
	277	return -EFAULT;
	278
	279	if (rsv.flags)
	280	return -EOPNOTSUPP;
	281	return ops->pr_release(bdev, rsv.key, rsv.type);
	282	}
	283
	284	static int blkdev_pr_preempt(struct block_device *bdev,
	285	struct pr_preempt __user *arg, bool abort)
	286	{
	287	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
	288	struct pr_preempt p;
	289
	290	if (!capable(CAP_SYS_ADMIN))
	291	return -EPERM;
	292	if (!ops \|\| !ops->pr_preempt)
	293	return -EOPNOTSUPP;
294	if (copy_from_user(&p, arg, sizeof(p)))
295	return -EFAULT;
296
297	if (p.flags)
298	return -EOPNOTSUPP;
299	return ops->pr_preempt(bdev, p.old_key, p.new_key, p.type, abort);
300	}
301
302	static int blkdev_pr_clear(struct block_device *bdev,
303	struct pr_clear __user *arg)
304	{
305	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
306	struct pr_clear c;
307
308	if (!capable(CAP_SYS_ADMIN))
309	return -EPERM;
310	if (!ops \|\| !ops->pr_clear)
311	return -EOPNOTSUPP;
312	if (copy_from_user(&c, arg, sizeof(c)))
313	return -EFAULT;
314
315	if (c.flags)
316	return -EOPNOTSUPP;
317	return ops->pr_clear(bdev, c.key);
318	}
319
d8e4bb81 CH	320	static int blkdev_flushbuf(struct block_device *bdev, fmode_t mode,
d8e4bb81 CH	321	unsigned cmd, unsigned long arg)
bb93e3a5	322	{
d8e4bb81 CH	323	if (!capable(CAP_SYS_ADMIN))
d8e4bb81 CH	324	return -EACCES;
d8e4bb81 CH	325	fsync_bdev(bdev);
	326	invalidate_bdev(bdev);
	327	return 0;
	328	}
d30a2605	329
d8e4bb81 CH	330	static int blkdev_roset(struct block_device *bdev, fmode_t mode,
	331	unsigned cmd, unsigned long arg)
	332	{
	333	int ret, n;
d30a2605	334
bb749b31 ID	335	if (!capable(CAP_SYS_ADMIN))
	336	return -EACCES;
	337
d8e4bb81 CH	338	if (get_user(n, (int __user *)arg))
d8e4bb81 CH	339	return -EFAULT;
e00adcad CH	340	if (bdev->bd_disk->fops->set_read_only) {
	341	ret = bdev->bd_disk->fops->set_read_only(bdev, n);
	342	if (ret)
	343	return ret;
	344	}
83950d35	345	bdev->bd_read_only = n;
d8e4bb81 CH	346	return 0;
d8e4bb81 CH	347	}
d30a2605	348
d8e4bb81 CH	349	static int blkdev_getgeo(struct block_device *bdev,
	350	struct hd_geometry __user *argp)
	351	{
	352	struct gendisk *disk = bdev->bd_disk;
	353	struct hd_geometry geo;
	354	int ret;
d30a2605	355
d8e4bb81 CH	356	if (!argp)
	357	return -EINVAL;
	358	if (!disk->fops->getgeo)
	359	return -ENOTTY;
	360
	361	/*
	362	* We need to set the startsect first, the driver may
	363	* want to override it.
	364	*/
	365	memset(&geo, 0, sizeof(geo));
	366	geo.start = get_start_sect(bdev);
	367	ret = disk->fops->getgeo(bdev, &geo);
	368	if (ret)
	369	return ret;
	370	if (copy_to_user(argp, &geo, sizeof(geo)))
	371	return -EFAULT;
	372	return 0;
	373	}
66ba32dc	374
bdc1ddad AB	375	#ifdef CONFIG_COMPAT
	376	struct compat_hd_geometry {
	377	unsigned char heads;
	378	unsigned char sectors;
	379	unsigned short cylinders;
	380	u32 start;
	381	};
	382
9b81648c AB	383	static int compat_hdio_getgeo(struct block_device *bdev,
9b81648c AB	384	struct compat_hd_geometry __user *ugeo)
bdc1ddad	385	{
9b81648c	386	struct gendisk *disk = bdev->bd_disk;
bdc1ddad AB	387	struct hd_geometry geo;
	388	int ret;
	389
	390	if (!ugeo)
	391	return -EINVAL;
	392	if (!disk->fops->getgeo)
	393	return -ENOTTY;
	394
	395	memset(&geo, 0, sizeof(geo));
	396	/*
	397	* We need to set the startsect first, the driver may
	398	* want to override it.
	399	*/
	400	geo.start = get_start_sect(bdev);
	401	ret = disk->fops->getgeo(bdev, &geo);
	402	if (ret)
	403	return ret;
	404
	405	ret = copy_to_user(ugeo, &geo, 4);
	406	ret \|= put_user(geo.start, &ugeo->start);
	407	if (ret)
	408	ret = -EFAULT;
	409
	410	return ret;
	411	}
	412	#endif
	413
d8e4bb81 CH	414	/* set the logical block size */
	415	static int blkdev_bszset(struct block_device *bdev, fmode_t mode,
	416	int __user *argp)
	417	{
	418	int ret, n;
66ba32dc	419
d8e4bb81 CH	420	if (!capable(CAP_SYS_ADMIN))
	421	return -EACCES;
	422	if (!argp)
	423	return -EINVAL;
	424	if (get_user(n, argp))
	425	return -EFAULT;
66ba32dc	426
47816282 CH	427	if (mode & FMODE_EXCL)
47816282 CH	428	return set_blocksize(bdev, n);
d30a2605	429
47816282 CH	430	if (IS_ERR(blkdev_get_by_dev(bdev->bd_dev, mode \| FMODE_EXCL, &bdev)))
47816282 CH	431	return -EBUSY;
d8e4bb81	432	ret = set_blocksize(bdev, n);
47816282 CH	433	blkdev_put(bdev, mode \| FMODE_EXCL);
47816282 CH	434
d8e4bb81 CH	435	return ret;
d8e4bb81 CH	436	}
a885c8c4	437
d8e4bb81	438	/*
9b81648c AB	439	* Common commands that are handled the same way on native and compat
	440	* user space. Note the separate arg/argp parameters that are needed
	441	* to deal with the compat_ptr() conversion.
d8e4bb81	442	*/
9b81648c AB	443	static int blkdev_common_ioctl(struct block_device *bdev, fmode_t mode,
9b81648c AB	444	unsigned cmd, unsigned long arg, void __user *argp)
d8e4bb81	445	{
d8e4bb81 CH	446	unsigned int max_sectors;
	447
	448	switch (cmd) {
	449	case BLKFLSBUF:
	450	return blkdev_flushbuf(bdev, mode, cmd, arg);
	451	case BLKROSET:
	452	return blkdev_roset(bdev, mode, cmd, arg);
	453	case BLKDISCARD:
	454	return blk_ioctl_discard(bdev, mode, arg, 0);
	455	case BLKSECDISCARD:
	456	return blk_ioctl_discard(bdev, mode, arg,
	457	BLKDEV_DISCARD_SECURE);
	458	case BLKZEROOUT:
	459	return blk_ioctl_zeroout(bdev, mode, arg);
7957d93b MC	460	case BLKGETDISKSEQ:
7957d93b MC	461	return put_u64(argp, bdev->bd_disk->diskseq);
3ed05a98 ST	462	case BLKREPORTZONE:
	463	return blkdev_report_zones_ioctl(bdev, mode, cmd, arg);
	464	case BLKRESETZONE:
e876df1f AJ	465	case BLKOPENZONE:
	466	case BLKCLOSEZONE:
	467	case BLKFINISHZONE:
	468	return blkdev_zone_mgmt_ioctl(bdev, mode, cmd, arg);
72cd8757	469	case BLKGETZONESZ:
9b81648c	470	return put_uint(argp, bdev_zone_sectors(bdev));
65e4e3ee	471	case BLKGETNRZONES:
9b81648c	472	return put_uint(argp, blkdev_nr_zones(bdev->bd_disk));
45048d09	473	case BLKROGET:
9b81648c	474	return put_int(argp, bdev_read_only(bdev) != 0);
ac481c20	475	case BLKSSZGET: /* get block device logical block size */
9b81648c	476	return put_int(argp, bdev_logical_block_size(bdev));
ac481c20	477	case BLKPBSZGET: /* get block device physical block size */
9b81648c	478	return put_uint(argp, bdev_physical_block_size(bdev));
ac481c20	479	case BLKIOMIN:
9b81648c	480	return put_uint(argp, bdev_io_min(bdev));
ac481c20	481	case BLKIOOPT:
9b81648c	482	return put_uint(argp, bdev_io_opt(bdev));
ac481c20	483	case BLKALIGNOFF:
9b81648c	484	return put_int(argp, bdev_alignment_offset(bdev));
98262f27	485	case BLKDISCARDZEROES:
9b81648c	486	return put_uint(argp, 0);
45048d09	487	case BLKSECTGET:
63f26496 AM	488	max_sectors = min_t(unsigned int, USHRT_MAX,
63f26496 AM	489	queue_max_sectors(bdev_get_queue(bdev)));
9b81648c	490	return put_ushort(argp, max_sectors);
ef00f59c	491	case BLKROTATIONAL:
9b81648c	492	return put_ushort(argp, !blk_queue_nonrot(bdev_get_queue(bdev)));
45048d09 AV	493	case BLKRASET:
	494	case BLKFRASET:
	495	if(!capable(CAP_SYS_ADMIN))
	496	return -EACCES;
a11d7fc2	497	bdev->bd_disk->bdi->ra_pages = (arg * 512) / PAGE_SIZE;
45048d09	498	return 0;
45048d09	499	case BLKRRPART:
e16e506c CH	500	if (!capable(CAP_SYS_ADMIN))
	501	return -EACCES;
	502	if (bdev_is_partition(bdev))
	503	return -EINVAL;
	504	return disk_scan_partitions(bdev->bd_disk, mode & ~FMODE_EXCL);
45048d09 AV	505	case BLKTRACESTART:
45048d09 AV	506	case BLKTRACESTOP:
45048d09	507	case BLKTRACETEARDOWN:
d8e4bb81	508	return blk_trace_ioctl(bdev, cmd, argp);
bbd3e064 CH	509	case IOC_PR_REGISTER:
	510	return blkdev_pr_register(bdev, argp);
	511	case IOC_PR_RESERVE:
	512	return blkdev_pr_reserve(bdev, argp);
	513	case IOC_PR_RELEASE:
	514	return blkdev_pr_release(bdev, argp);
	515	case IOC_PR_PREEMPT:
	516	return blkdev_pr_preempt(bdev, argp, false);
	517	case IOC_PR_PREEMPT_ABORT:
	518	return blkdev_pr_preempt(bdev, argp, true);
	519	case IOC_PR_CLEAR:
	520	return blkdev_pr_clear(bdev, argp);
45048d09	521	default:
9b81648c	522	return -ENOIOCTLCMD;
45048d09	523	}
1da177e4	524	}
9b81648c AB	525
	526	/*
	527	* Always keep this in sync with compat_blkdev_ioctl()
	528	* to handle all incompatible commands in both functions.
	529	*
	530	* New commands must be compatible and go into blkdev_common_ioctl
	531	*/
8a709512	532	long blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
9b81648c	533	{
8a709512	534	struct block_device *bdev = I_BDEV(file->f_mapping->host);
9b81648c	535	void __user argp = (void __user )arg;
8a709512	536	fmode_t mode = file->f_mode;
8a709512 CH	537	int ret;
	538
	539	/*
	540	* O_NDELAY can be altered using fcntl(.., F_SETFL, ..), so we have
	541	* to updated it before every ioctl.
	542	*/
	543	if (file->f_flags & O_NDELAY)
	544	mode \|= FMODE_NDELAY;
	545	else
	546	mode &= ~FMODE_NDELAY;
9b81648c AB	547
	548	switch (cmd) {
	549	/* These need separate implementations for the data structure */
	550	case HDIO_GETGEO:
	551	return blkdev_getgeo(bdev, argp);
	552	case BLKPG:
	553	return blkpg_ioctl(bdev, argp);
	554
	555	/* Compat mode returns 32-bit data instead of 'long' */
	556	case BLKRAGET:
	557	case BLKFRAGET:
	558	if (!argp)
	559	return -EINVAL;
a11d7fc2 CH	560	return put_long(argp,
a11d7fc2 CH	561	(bdev->bd_disk->bdi->ra_pages * PAGE_SIZE) / 512);
9b81648c	562	case BLKGETSIZE:
946e9937	563	if (bdev_nr_sectors(bdev) > ~0UL)
9b81648c	564	return -EFBIG;
946e9937	565	return put_ulong(argp, bdev_nr_sectors(bdev));
9b81648c AB	566
	567	/* The data is compatible, but the command number is different */
	568	case BLKBSZGET: /* get block device soft block size (cf. BLKSSZGET) */
	569	return put_int(argp, block_size(bdev));
	570	case BLKBSZSET:
	571	return blkdev_bszset(bdev, mode, argp);
	572	case BLKGETSIZE64:
946e9937	573	return put_u64(argp, bdev_nr_bytes(bdev));
9b81648c AB	574
	575	/* Incompatible alignment on i386 */
	576	case BLKTRACESETUP:
	577	return blk_trace_ioctl(bdev, cmd, argp);
	578	default:
	579	break;
	580	}
	581
	582	ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp);
a7cb3d2f CH	583	if (ret != -ENOIOCTLCMD)
a7cb3d2f CH	584	return ret;
9b81648c	585
a7cb3d2f CH	586	if (!bdev->bd_disk->fops->ioctl)
	587	return -ENOTTY;
	588	return bdev->bd_disk->fops->ioctl(bdev, mode, cmd, arg);
9b81648c	589	}
bdc1ddad AB	590
bdc1ddad AB	591	#ifdef CONFIG_COMPAT
9b81648c	592
bdc1ddad AB	593	#define BLKBSZGET_32 _IOR(0x12, 112, int)
	594	#define BLKBSZSET_32 _IOW(0x12, 113, int)
	595	#define BLKGETSIZE64_32 _IOR(0x12, 114, int)
	596
	597	/* Most of the generic ioctls are handled in the normal fallback path.
	598	This assumes the blkdev's low level compat_ioctl always returns
	599	ENOIOCTLCMD for unknown ioctls. */
	600	long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
	601	{
9b81648c AB	602	int ret;
9b81648c AB	603	void __user *argp = compat_ptr(arg);
4e7b5671	604	struct block_device *bdev = I_BDEV(file->f_mapping->host);
bdc1ddad AB	605	struct gendisk *disk = bdev->bd_disk;
bdc1ddad AB	606	fmode_t mode = file->f_mode;
bdc1ddad AB	607
	608	/*
	609	* O_NDELAY can be altered using fcntl(.., F_SETFL, ..), so we have
	610	* to updated it before every ioctl.
	611	*/
	612	if (file->f_flags & O_NDELAY)
	613	mode \|= FMODE_NDELAY;
	614	else
	615	mode &= ~FMODE_NDELAY;
	616
	617	switch (cmd) {
9b81648c	618	/* These need separate implementations for the data structure */
bdc1ddad	619	case HDIO_GETGEO:
9b81648c	620	return compat_hdio_getgeo(bdev, argp);
bdc1ddad	621	case BLKPG:
9b81648c AB	622	return compat_blkpg_ioctl(bdev, argp);
	623
	624	/* Compat mode returns 32-bit data instead of 'long' */
bdc1ddad AB	625	case BLKRAGET:
bdc1ddad AB	626	case BLKFRAGET:
9b81648c	627	if (!argp)
bdc1ddad	628	return -EINVAL;
9b81648c	629	return compat_put_long(argp,
a11d7fc2	630	(bdev->bd_disk->bdi->ra_pages * PAGE_SIZE) / 512);
bdc1ddad	631	case BLKGETSIZE:
946e9937	632	if (bdev_nr_sectors(bdev) > ~0UL)
bdc1ddad	633	return -EFBIG;
946e9937	634	return compat_put_ulong(argp, bdev_nr_sectors(bdev));
bdc1ddad	635
9b81648c AB	636	/* The data is compatible, but the command number is different */
	637	case BLKBSZGET_32: /* get the logical block size (cf. BLKSSZGET) */
	638	return put_int(argp, bdev_logical_block_size(bdev));
	639	case BLKBSZSET_32:
	640	return blkdev_bszset(bdev, mode, argp);
bdc1ddad	641	case BLKGETSIZE64_32:
946e9937	642	return put_u64(argp, bdev_nr_bytes(bdev));
bdc1ddad	643
9b81648c	644	/* Incompatible alignment on i386 */
bdc1ddad	645	case BLKTRACESETUP32:
9b81648c	646	return blk_trace_ioctl(bdev, cmd, argp);
bdc1ddad	647	default:
9b81648c	648	break;
bdc1ddad	649	}
9b81648c AB	650
	651	ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp);
	652	if (ret == -ENOIOCTLCMD && disk->fops->compat_ioctl)
	653	ret = disk->fops->compat_ioctl(bdev, mode, cmd, arg);
	654
	655	return ret;
bdc1ddad AB	656	}
bdc1ddad AB	657	#endif