[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);
	int err;

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

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

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

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

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

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

	err = truncate_bdev_range(bdev, mode, start, start + len - 1);
	if (err)
		return err;

	return blkdev_issue_discard(bdev, start >> 9, len >> 9,
				    GFP_KERNEL, flags);
}

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)i_size_read(bdev->bd_inode))
		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
 */
int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
			unsigned long arg)
{
	int ret;
	loff_t size;
	void __user *argp = (void __user *)arg;

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

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

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

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

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

	if (!bdev->bd_disk->fops->ioctl)
		return -ENOTTY;
	return bdev->bd_disk->fops->ioctl(bdev, mode, cmd, arg);
}

#ifdef CONFIG_COMPAT

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

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

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

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

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

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

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

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

	return ret;
}
#endif
Commit	Line	Data
3dcf60bc	1	// SPDX-License-Identifier: GPL-2.0
c59ede7b	2	#include <linux/capability.h>
ee6a129d	3	#include <linux/compat.h>
1da177e4	4	#include <linux/blkdev.h>
d5decd3b	5	#include <linux/export.h>
5a0e3ad6	6	#include <linux/gfp.h>
1da177e4	7	#include <linux/blkpg.h>
a885c8c4	8	#include <linux/hdreg.h>
1da177e4	9	#include <linux/backing-dev.h>
ff01bb48	10	#include <linux/fs.h>
2056a782	11	#include <linux/blktrace_api.h>
bbd3e064	12	#include <linux/pr.h>
7c0f6ba6	13	#include <linux/uaccess.h>
581e2600	14	#include "blk.h"
1da177e4	15
5fb889f5 AB	16	static int blkpg_do_ioctl(struct block_device *bdev,
5fb889f5 AB	17	struct blkpg_partition __user *upart, int op)
1da177e4	18	{
7f6be376	19	struct gendisk *disk = bdev->bd_disk;
1da177e4 LT	20	struct blkpg_partition p;
1da177e4 LT	21	long long start, length;
1da177e4 LT	22
	23	if (!capable(CAP_SYS_ADMIN))
	24	return -EACCES;
5fb889f5	25	if (copy_from_user(&p, upart, sizeof(struct blkpg_partition)))
1da177e4	26	return -EFAULT;
fa01b1e9	27	if (bdev_is_partition(bdev))
1da177e4	28	return -EINVAL;
88e34126	29
fa9156ae CH	30	if (p.pno <= 0)
fa9156ae CH	31	return -EINVAL;
e71bf0d0	32
fa9156ae	33	if (op == BLKPG_DEL_PARTITION)
926fbb16	34	return bdev_del_partition(disk, p.pno);
e71bf0d0	35
fa9156ae CH	36	start = p.start >> SECTOR_SHIFT;
fa9156ae CH	37	length = p.length >> SECTOR_SHIFT;
e71bf0d0	38
fa9156ae CH	39	switch (op) {
	40	case BLKPG_ADD_PARTITION:
	41	/* check if partition is aligned to blocksize */
	42	if (p.start & (bdev_logical_block_size(bdev) - 1))
1da177e4	43	return -EINVAL;
7f6be376	44	return bdev_add_partition(disk, p.pno, start, length);
fa9156ae	45	case BLKPG_RESIZE_PARTITION:
3d2e7989	46	return bdev_resize_partition(disk, p.pno, start, length);
fa9156ae CH	47	default:
fa9156ae CH	48	return -EINVAL;
1da177e4 LT	49	}
	50	}
	51
5fb889f5 AB	52	static int blkpg_ioctl(struct block_device *bdev,
	53	struct blkpg_ioctl_arg __user *arg)
	54	{
	55	struct blkpg_partition __user *udata;
	56	int op;
	57
	58	if (get_user(op, &arg->op) \|\| get_user(udata, &arg->data))
	59	return -EFAULT;
	60
	61	return blkpg_do_ioctl(bdev, udata, op);
	62	}
	63
	64	#ifdef CONFIG_COMPAT
	65	struct compat_blkpg_ioctl_arg {
	66	compat_int_t op;
	67	compat_int_t flags;
	68	compat_int_t datalen;
	69	compat_caddr_t data;
	70	};
	71
	72	static int compat_blkpg_ioctl(struct block_device *bdev,
	73	struct compat_blkpg_ioctl_arg __user *arg)
	74	{
	75	compat_caddr_t udata;
	76	int op;
	77
	78	if (get_user(op, &arg->op) \|\| get_user(udata, &arg->data))
	79	return -EFAULT;
	80
	81	return blkpg_do_ioctl(bdev, compat_ptr(udata), op);
	82	}
	83	#endif
	84
4601b4b1	85	static int blkdev_reread_part(struct block_device *bdev, fmode_t mode)
1da177e4	86	{
4601b4b1	87	struct block_device *tmp;
f0b870df	88
fa01b1e9	89	if (!disk_part_scan_enabled(bdev->bd_disk) \|\| bdev_is_partition(bdev))
1da177e4 LT	90	return -EINVAL;
	91	if (!capable(CAP_SYS_ADMIN))
	92	return -EACCES;
ab4b5705	93	if (bdev->bd_disk->open_partitions)
68e6582e	94	return -EBUSY;
be324177	95
4601b4b1 CH	96	/*
	97	* Reopen the device to revalidate the driver state and force a
	98	* partition rescan.
	99	*/
	100	mode &= ~FMODE_EXCL;
	101	set_bit(GD_NEED_PART_SCAN, &bdev->bd_disk->state);
be324177	102
4601b4b1 CH	103	tmp = blkdev_get_by_dev(bdev->bd_dev, mode, NULL);
	104	if (IS_ERR(tmp))
	105	return PTR_ERR(tmp);
	106	blkdev_put(tmp, mode);
	107	return 0;
1da177e4 LT	108	}
1da177e4 LT	109
d8e4bb81 CH	110	static int blk_ioctl_discard(struct block_device *bdev, fmode_t mode,
d8e4bb81 CH	111	unsigned long arg, unsigned long flags)
d30a2605	112	{
d8e4bb81 CH	113	uint64_t range[2];
d8e4bb81 CH	114	uint64_t start, len;
351499a1	115	struct request_queue *q = bdev_get_queue(bdev);
384d87ef	116	int err;
d8e4bb81 CH	117
	118	if (!(mode & FMODE_WRITE))
	119	return -EBADF;
	120
351499a1 DM	121	if (!blk_queue_discard(q))
	122	return -EOPNOTSUPP;
	123
d8e4bb81 CH	124	if (copy_from_user(range, (void __user *)arg, sizeof(range)))
	125	return -EFAULT;
	126
	127	start = range[0];
	128	len = range[1];
8d57a98c	129
d30a2605 DW	130	if (start & 511)
	131	return -EINVAL;
	132	if (len & 511)
	133	return -EINVAL;
d30a2605	134
351499a1	135	if (start + len > i_size_read(bdev->bd_inode))
d30a2605	136	return -EINVAL;
384d87ef JK	137
	138	err = truncate_bdev_range(bdev, mode, start, start + len - 1);
	139	if (err)
	140	return err;
	141
351499a1 DM	142	return blkdev_issue_discard(bdev, start >> 9, len >> 9,
351499a1 DM	143	GFP_KERNEL, flags);
d30a2605 DW	144	}
d30a2605 DW	145
d8e4bb81 CH	146	static int blk_ioctl_zeroout(struct block_device *bdev, fmode_t mode,
d8e4bb81 CH	147	unsigned long arg)
66ba32dc	148	{
d8e4bb81	149	uint64_t range[2];
22dd6d35	150	uint64_t start, end, len;
384d87ef	151	int err;
d8e4bb81 CH	152
	153	if (!(mode & FMODE_WRITE))
	154	return -EBADF;
	155
	156	if (copy_from_user(range, (void __user *)arg, sizeof(range)))
	157	return -EFAULT;
	158
	159	start = range[0];
	160	len = range[1];
22dd6d35	161	end = start + len - 1;
d8e4bb81	162
66ba32dc MP	163	if (start & 511)
	164	return -EINVAL;
	165	if (len & 511)
	166	return -EINVAL;
22dd6d35 DW	167	if (end >= (uint64_t)i_size_read(bdev->bd_inode))
	168	return -EINVAL;
	169	if (end < start)
66ba32dc MP	170	return -EINVAL;
66ba32dc MP	171
22dd6d35	172	/* Invalidate the page cache, including dirty pages */
384d87ef JK	173	err = truncate_bdev_range(bdev, mode, start, end);
	174	if (err)
	175	return err;
22dd6d35 DW	176
22dd6d35 DW	177	return blkdev_issue_zeroout(bdev, start >> 9, len >> 9, GFP_KERNEL,
ee472d83	178	BLKDEV_ZERO_NOUNMAP);
66ba32dc MP	179	}
66ba32dc MP	180
9b81648c	181	static int put_ushort(unsigned short __user *argp, unsigned short val)
1da177e4	182	{
9b81648c	183	return put_user(val, argp);
1da177e4 LT	184	}
1da177e4 LT	185
9b81648c	186	static int put_int(int __user *argp, int val)
1da177e4	187	{
9b81648c	188	return put_user(val, argp);
1da177e4 LT	189	}
1da177e4 LT	190
9b81648c	191	static int put_uint(unsigned int __user *argp, unsigned int val)
ac481c20	192	{
9b81648c	193	return put_user(val, argp);
ac481c20 MP	194	}
ac481c20 MP	195
9b81648c	196	static int put_long(long __user *argp, long val)
1da177e4	197	{
9b81648c	198	return put_user(val, argp);
1da177e4 LT	199	}
1da177e4 LT	200
9b81648c	201	static int put_ulong(unsigned long __user *argp, unsigned long val)
1da177e4	202	{
9b81648c	203	return put_user(val, argp);
1da177e4 LT	204	}
1da177e4 LT	205
9b81648c	206	static int put_u64(u64 __user *argp, u64 val)
1da177e4	207	{
9b81648c	208	return put_user(val, argp);
1da177e4 LT	209	}
1da177e4 LT	210
bdc1ddad	211	#ifdef CONFIG_COMPAT
c8210a57	212	static int compat_put_long(compat_long_t __user *argp, long val)
bdc1ddad	213	{
9b81648c	214	return put_user(val, argp);
bdc1ddad AB	215	}
bdc1ddad AB	216
c8210a57	217	static int compat_put_ulong(compat_ulong_t __user *argp, compat_ulong_t val)
bdc1ddad	218	{
9b81648c	219	return put_user(val, argp);
bdc1ddad AB	220	}
	221	#endif
	222
ee6a129d AB	223	#ifdef CONFIG_COMPAT
	224	/*
	225	* This is the equivalent of compat_ptr_ioctl(), to be used by block
	226	* drivers that implement only commands that are completely compatible
	227	* between 32-bit and 64-bit user space
	228	*/
	229	int blkdev_compat_ptr_ioctl(struct block_device *bdev, fmode_t mode,
	230	unsigned cmd, unsigned long arg)
	231	{
	232	struct gendisk *disk = bdev->bd_disk;
	233
	234	if (disk->fops->ioctl)
	235	return disk->fops->ioctl(bdev, mode, cmd,
	236	(unsigned long)compat_ptr(arg));
	237
	238	return -ENOIOCTLCMD;
	239	}
	240	EXPORT_SYMBOL(blkdev_compat_ptr_ioctl);
	241	#endif
	242
bbd3e064 CH	243	static int blkdev_pr_register(struct block_device *bdev,
	244	struct pr_registration __user *arg)
	245	{
	246	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
	247	struct pr_registration reg;
	248
	249	if (!capable(CAP_SYS_ADMIN))
	250	return -EPERM;
	251	if (!ops \|\| !ops->pr_register)
	252	return -EOPNOTSUPP;
	253	if (copy_from_user(&reg, arg, sizeof(reg)))
	254	return -EFAULT;
	255
	256	if (reg.flags & ~PR_FL_IGNORE_KEY)
	257	return -EOPNOTSUPP;
	258	return ops->pr_register(bdev, reg.old_key, reg.new_key, reg.flags);
	259	}
	260
	261	static int blkdev_pr_reserve(struct block_device *bdev,
	262	struct pr_reservation __user *arg)
	263	{
	264	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
	265	struct pr_reservation rsv;
	266
	267	if (!capable(CAP_SYS_ADMIN))
	268	return -EPERM;
	269	if (!ops \|\| !ops->pr_reserve)
	270	return -EOPNOTSUPP;
	271	if (copy_from_user(&rsv, arg, sizeof(rsv)))
	272	return -EFAULT;
	273
	274	if (rsv.flags & ~PR_FL_IGNORE_KEY)
	275	return -EOPNOTSUPP;
	276	return ops->pr_reserve(bdev, rsv.key, rsv.type, rsv.flags);
	277	}
	278
	279	static int blkdev_pr_release(struct block_device *bdev,
	280	struct pr_reservation __user *arg)
	281	{
	282	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
	283	struct pr_reservation rsv;
	284
	285	if (!capable(CAP_SYS_ADMIN))
	286	return -EPERM;
	287	if (!ops \|\| !ops->pr_release)
	288	return -EOPNOTSUPP;
	289	if (copy_from_user(&rsv, arg, sizeof(rsv)))
	290	return -EFAULT;
	291
	292	if (rsv.flags)
	293	return -EOPNOTSUPP;
	294	return ops->pr_release(bdev, rsv.key, rsv.type);
	295	}
	296
	297	static int blkdev_pr_preempt(struct block_device *bdev,
	298	struct pr_preempt __user *arg, bool abort)
	299	{
	300	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
	301	struct pr_preempt p;
	302
	303	if (!capable(CAP_SYS_ADMIN))
	304	return -EPERM;
	305	if (!ops \|\| !ops->pr_preempt)
	306	return -EOPNOTSUPP;
307	if (copy_from_user(&p, arg, sizeof(p)))
308	return -EFAULT;
309
310	if (p.flags)
311	return -EOPNOTSUPP;
312	return ops->pr_preempt(bdev, p.old_key, p.new_key, p.type, abort);
313	}
314
315	static int blkdev_pr_clear(struct block_device *bdev,
316	struct pr_clear __user *arg)
317	{
318	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
319	struct pr_clear c;
320
321	if (!capable(CAP_SYS_ADMIN))
322	return -EPERM;
323	if (!ops \|\| !ops->pr_clear)
324	return -EOPNOTSUPP;
325	if (copy_from_user(&c, arg, sizeof(c)))
326	return -EFAULT;
327
328	if (c.flags)
329	return -EOPNOTSUPP;
330	return ops->pr_clear(bdev, c.key);
331	}
332
d8e4bb81 CH	333	static int blkdev_flushbuf(struct block_device *bdev, fmode_t mode,
d8e4bb81 CH	334	unsigned cmd, unsigned long arg)
bb93e3a5	335	{
d8e4bb81 CH	336	if (!capable(CAP_SYS_ADMIN))
d8e4bb81 CH	337	return -EACCES;
d8e4bb81 CH	338	fsync_bdev(bdev);
	339	invalidate_bdev(bdev);
	340	return 0;
	341	}
d30a2605	342
d8e4bb81 CH	343	static int blkdev_roset(struct block_device *bdev, fmode_t mode,
	344	unsigned cmd, unsigned long arg)
	345	{
	346	int ret, n;
d30a2605	347
bb749b31 ID	348	if (!capable(CAP_SYS_ADMIN))
	349	return -EACCES;
	350
d8e4bb81 CH	351	if (get_user(n, (int __user *)arg))
d8e4bb81 CH	352	return -EFAULT;
e00adcad CH	353	if (bdev->bd_disk->fops->set_read_only) {
	354	ret = bdev->bd_disk->fops->set_read_only(bdev, n);
	355	if (ret)
	356	return ret;
	357	}
83950d35	358	bdev->bd_read_only = n;
d8e4bb81 CH	359	return 0;
d8e4bb81 CH	360	}
d30a2605	361
d8e4bb81 CH	362	static int blkdev_getgeo(struct block_device *bdev,
	363	struct hd_geometry __user *argp)
	364	{
	365	struct gendisk *disk = bdev->bd_disk;
	366	struct hd_geometry geo;
	367	int ret;
d30a2605	368
d8e4bb81 CH	369	if (!argp)
	370	return -EINVAL;
	371	if (!disk->fops->getgeo)
	372	return -ENOTTY;
	373
	374	/*
	375	* We need to set the startsect first, the driver may
	376	* want to override it.
	377	*/
	378	memset(&geo, 0, sizeof(geo));
	379	geo.start = get_start_sect(bdev);
	380	ret = disk->fops->getgeo(bdev, &geo);
	381	if (ret)
	382	return ret;
	383	if (copy_to_user(argp, &geo, sizeof(geo)))
	384	return -EFAULT;
	385	return 0;
	386	}
66ba32dc	387
bdc1ddad AB	388	#ifdef CONFIG_COMPAT
	389	struct compat_hd_geometry {
	390	unsigned char heads;
	391	unsigned char sectors;
	392	unsigned short cylinders;
	393	u32 start;
	394	};
	395
9b81648c AB	396	static int compat_hdio_getgeo(struct block_device *bdev,
9b81648c AB	397	struct compat_hd_geometry __user *ugeo)
bdc1ddad	398	{
9b81648c	399	struct gendisk *disk = bdev->bd_disk;
bdc1ddad AB	400	struct hd_geometry geo;
	401	int ret;
	402
	403	if (!ugeo)
	404	return -EINVAL;
	405	if (!disk->fops->getgeo)
	406	return -ENOTTY;
	407
	408	memset(&geo, 0, sizeof(geo));
	409	/*
	410	* We need to set the startsect first, the driver may
	411	* want to override it.
	412	*/
	413	geo.start = get_start_sect(bdev);
	414	ret = disk->fops->getgeo(bdev, &geo);
	415	if (ret)
	416	return ret;
	417
	418	ret = copy_to_user(ugeo, &geo, 4);
	419	ret \|= put_user(geo.start, &ugeo->start);
	420	if (ret)
	421	ret = -EFAULT;
	422
	423	return ret;
	424	}
	425	#endif
	426
d8e4bb81 CH	427	/* set the logical block size */
	428	static int blkdev_bszset(struct block_device *bdev, fmode_t mode,
	429	int __user *argp)
	430	{
	431	int ret, n;
66ba32dc	432
d8e4bb81 CH	433	if (!capable(CAP_SYS_ADMIN))
	434	return -EACCES;
	435	if (!argp)
	436	return -EINVAL;
	437	if (get_user(n, argp))
	438	return -EFAULT;
66ba32dc	439
47816282 CH	440	if (mode & FMODE_EXCL)
47816282 CH	441	return set_blocksize(bdev, n);
d30a2605	442
47816282 CH	443	if (IS_ERR(blkdev_get_by_dev(bdev->bd_dev, mode \| FMODE_EXCL, &bdev)))
47816282 CH	444	return -EBUSY;
d8e4bb81	445	ret = set_blocksize(bdev, n);
47816282 CH	446	blkdev_put(bdev, mode \| FMODE_EXCL);
47816282 CH	447
d8e4bb81 CH	448	return ret;
d8e4bb81 CH	449	}
a885c8c4	450
d8e4bb81	451	/*
9b81648c AB	452	* Common commands that are handled the same way on native and compat
	453	* user space. Note the separate arg/argp parameters that are needed
	454	* to deal with the compat_ptr() conversion.
d8e4bb81	455	*/
9b81648c AB	456	static int blkdev_common_ioctl(struct block_device *bdev, fmode_t mode,
9b81648c AB	457	unsigned cmd, unsigned long arg, void __user *argp)
d8e4bb81	458	{
d8e4bb81 CH	459	unsigned int max_sectors;
	460
	461	switch (cmd) {
	462	case BLKFLSBUF:
	463	return blkdev_flushbuf(bdev, mode, cmd, arg);
	464	case BLKROSET:
	465	return blkdev_roset(bdev, mode, cmd, arg);
	466	case BLKDISCARD:
	467	return blk_ioctl_discard(bdev, mode, arg, 0);
	468	case BLKSECDISCARD:
	469	return blk_ioctl_discard(bdev, mode, arg,
	470	BLKDEV_DISCARD_SECURE);
	471	case BLKZEROOUT:
	472	return blk_ioctl_zeroout(bdev, mode, arg);
7957d93b MC	473	case BLKGETDISKSEQ:
7957d93b MC	474	return put_u64(argp, bdev->bd_disk->diskseq);
3ed05a98 ST	475	case BLKREPORTZONE:
	476	return blkdev_report_zones_ioctl(bdev, mode, cmd, arg);
	477	case BLKRESETZONE:
e876df1f AJ	478	case BLKOPENZONE:
	479	case BLKCLOSEZONE:
	480	case BLKFINISHZONE:
	481	return blkdev_zone_mgmt_ioctl(bdev, mode, cmd, arg);
72cd8757	482	case BLKGETZONESZ:
9b81648c	483	return put_uint(argp, bdev_zone_sectors(bdev));
65e4e3ee	484	case BLKGETNRZONES:
9b81648c	485	return put_uint(argp, blkdev_nr_zones(bdev->bd_disk));
45048d09	486	case BLKROGET:
9b81648c	487	return put_int(argp, bdev_read_only(bdev) != 0);
ac481c20	488	case BLKSSZGET: /* get block device logical block size */
9b81648c	489	return put_int(argp, bdev_logical_block_size(bdev));
ac481c20	490	case BLKPBSZGET: /* get block device physical block size */
9b81648c	491	return put_uint(argp, bdev_physical_block_size(bdev));
ac481c20	492	case BLKIOMIN:
9b81648c	493	return put_uint(argp, bdev_io_min(bdev));
ac481c20	494	case BLKIOOPT:
9b81648c	495	return put_uint(argp, bdev_io_opt(bdev));
ac481c20	496	case BLKALIGNOFF:
9b81648c	497	return put_int(argp, bdev_alignment_offset(bdev));
98262f27	498	case BLKDISCARDZEROES:
9b81648c	499	return put_uint(argp, 0);
45048d09	500	case BLKSECTGET:
63f26496 AM	501	max_sectors = min_t(unsigned int, USHRT_MAX,
63f26496 AM	502	queue_max_sectors(bdev_get_queue(bdev)));
9b81648c	503	return put_ushort(argp, max_sectors);
ef00f59c	504	case BLKROTATIONAL:
9b81648c	505	return put_ushort(argp, !blk_queue_nonrot(bdev_get_queue(bdev)));
45048d09 AV	506	case BLKRASET:
	507	case BLKFRASET:
	508	if(!capable(CAP_SYS_ADMIN))
	509	return -EACCES;
a11d7fc2	510	bdev->bd_disk->bdi->ra_pages = (arg * 512) / PAGE_SIZE;
45048d09	511	return 0;
45048d09	512	case BLKRRPART:
4601b4b1	513	return blkdev_reread_part(bdev, mode);
45048d09 AV	514	case BLKTRACESTART:
45048d09 AV	515	case BLKTRACESTOP:
45048d09	516	case BLKTRACETEARDOWN:
d8e4bb81	517	return blk_trace_ioctl(bdev, cmd, argp);
bbd3e064 CH	518	case IOC_PR_REGISTER:
	519	return blkdev_pr_register(bdev, argp);
	520	case IOC_PR_RESERVE:
	521	return blkdev_pr_reserve(bdev, argp);
	522	case IOC_PR_RELEASE:
	523	return blkdev_pr_release(bdev, argp);
	524	case IOC_PR_PREEMPT:
	525	return blkdev_pr_preempt(bdev, argp, false);
	526	case IOC_PR_PREEMPT_ABORT:
	527	return blkdev_pr_preempt(bdev, argp, true);
	528	case IOC_PR_CLEAR:
	529	return blkdev_pr_clear(bdev, argp);
45048d09	530	default:
9b81648c	531	return -ENOIOCTLCMD;
45048d09	532	}
1da177e4	533	}
9b81648c AB	534
	535	/*
	536	* Always keep this in sync with compat_blkdev_ioctl()
	537	* to handle all incompatible commands in both functions.
	538	*
	539	* New commands must be compatible and go into blkdev_common_ioctl
	540	*/
	541	int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
	542	unsigned long arg)
	543	{
	544	int ret;
	545	loff_t size;
	546	void __user argp = (void __user )arg;
	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 AB	562	case BLKGETSIZE:
	563	size = i_size_read(bdev->bd_inode);
	564	if ((size >> 9) > ~0UL)
	565	return -EFBIG;
	566	return put_ulong(argp, size >> 9);
	567
	568	/* The data is compatible, but the command number is different */
	569	case BLKBSZGET: /* get block device soft block size (cf. BLKSSZGET) */
	570	return put_int(argp, block_size(bdev));
	571	case BLKBSZSET:
	572	return blkdev_bszset(bdev, mode, argp);
	573	case BLKGETSIZE64:
	574	return put_u64(argp, i_size_read(bdev->bd_inode));
	575
	576	/* Incompatible alignment on i386 */
	577	case BLKTRACESETUP:
	578	return blk_trace_ioctl(bdev, cmd, argp);
	579	default:
	580	break;
	581	}
	582
	583	ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp);
a7cb3d2f CH	584	if (ret != -ENOIOCTLCMD)
a7cb3d2f CH	585	return ret;
9b81648c	586
a7cb3d2f CH	587	if (!bdev->bd_disk->fops->ioctl)
	588	return -ENOTTY;
	589	return bdev->bd_disk->fops->ioctl(bdev, mode, cmd, arg);
9b81648c	590	}
bdc1ddad AB	591
bdc1ddad AB	592	#ifdef CONFIG_COMPAT
9b81648c	593
bdc1ddad AB	594	#define BLKBSZGET_32 _IOR(0x12, 112, int)
	595	#define BLKBSZSET_32 _IOW(0x12, 113, int)
	596	#define BLKGETSIZE64_32 _IOR(0x12, 114, int)
	597
	598	/* Most of the generic ioctls are handled in the normal fallback path.
	599	This assumes the blkdev's low level compat_ioctl always returns
	600	ENOIOCTLCMD for unknown ioctls. */
	601	long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
	602	{
9b81648c AB	603	int ret;
9b81648c AB	604	void __user *argp = compat_ptr(arg);
4e7b5671	605	struct block_device *bdev = I_BDEV(file->f_mapping->host);
bdc1ddad AB	606	struct gendisk *disk = bdev->bd_disk;
	607	fmode_t mode = file->f_mode;
	608	loff_t size;
bdc1ddad AB	609
	610	/*
	611	* O_NDELAY can be altered using fcntl(.., F_SETFL, ..), so we have
	612	* to updated it before every ioctl.
	613	*/
	614	if (file->f_flags & O_NDELAY)
	615	mode \|= FMODE_NDELAY;
	616	else
	617	mode &= ~FMODE_NDELAY;
	618
	619	switch (cmd) {
9b81648c	620	/* These need separate implementations for the data structure */
bdc1ddad	621	case HDIO_GETGEO:
9b81648c	622	return compat_hdio_getgeo(bdev, argp);
bdc1ddad	623	case BLKPG:
9b81648c AB	624	return compat_blkpg_ioctl(bdev, argp);
	625
	626	/* Compat mode returns 32-bit data instead of 'long' */
bdc1ddad AB	627	case BLKRAGET:
bdc1ddad AB	628	case BLKFRAGET:
9b81648c	629	if (!argp)
bdc1ddad	630	return -EINVAL;
9b81648c	631	return compat_put_long(argp,
a11d7fc2	632	(bdev->bd_disk->bdi->ra_pages * PAGE_SIZE) / 512);
bdc1ddad AB	633	case BLKGETSIZE:
	634	size = i_size_read(bdev->bd_inode);
	635	if ((size >> 9) > ~0UL)
	636	return -EFBIG;
9b81648c	637	return compat_put_ulong(argp, size >> 9);
bdc1ddad	638
9b81648c AB	639	/* The data is compatible, but the command number is different */
	640	case BLKBSZGET_32: /* get the logical block size (cf. BLKSSZGET) */
	641	return put_int(argp, bdev_logical_block_size(bdev));
	642	case BLKBSZSET_32:
	643	return blkdev_bszset(bdev, mode, argp);
bdc1ddad	644	case BLKGETSIZE64_32:
9b81648c	645	return put_u64(argp, i_size_read(bdev->bd_inode));
bdc1ddad	646
9b81648c	647	/* Incompatible alignment on i386 */
bdc1ddad	648	case BLKTRACESETUP32:
9b81648c	649	return blk_trace_ioctl(bdev, cmd, argp);
bdc1ddad	650	default:
9b81648c	651	break;
bdc1ddad	652	}
9b81648c AB	653
	654	ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp);
	655	if (ret == -ENOIOCTLCMD && disk->fops->compat_ioctl)
	656	ret = disk->fops->compat_ioctl(bdev, mode, cmd, arg);
	657
	658	return ret;
bdc1ddad AB	659	}
bdc1ddad AB	660	#endif