mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-16 17:23:55 +08:00
b623e34732
Pass a block_device instead of a request_queue as that is what most callers have at hand. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com> Acked-by: Damien Le Moal <damien.lemoal@opensource.wdc.com> Link: https://lore.kernel.org/r/20220706070350.1703384-12-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
684 lines
16 KiB
C
684 lines
16 KiB
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)
|
|
{
|
|
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);
|
|
fail:
|
|
filemap_invalidate_unlock(inode->i_mapping);
|
|
return err;
|
|
}
|
|
|
|
static int blk_ioctl_secure_erase(struct block_device *bdev, fmode_t mode,
|
|
void __user *argp)
|
|
{
|
|
uint64_t start, len;
|
|
uint64_t range[2];
|
|
int err;
|
|
|
|
if (!(mode & FMODE_WRITE))
|
|
return -EBADF;
|
|
if (!bdev_max_secure_erase_sectors(bdev))
|
|
return -EOPNOTSUPP;
|
|
if (copy_from_user(range, argp, sizeof(range)))
|
|
return -EFAULT;
|
|
|
|
start = range[0];
|
|
len = range[1];
|
|
if ((start & 511) || (len & 511))
|
|
return -EINVAL;
|
|
if (start + len > bdev_nr_bytes(bdev))
|
|
return -EINVAL;
|
|
|
|
filemap_invalidate_lock(bdev->bd_inode->i_mapping);
|
|
err = truncate_bdev_range(bdev, mode, start, start + len - 1);
|
|
if (!err)
|
|
err = blkdev_issue_secure_erase(bdev, start >> 9, len >> 9,
|
|
GFP_KERNEL);
|
|
filemap_invalidate_unlock(bdev->bd_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(®, 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);
|
|
case BLKSECDISCARD:
|
|
return blk_ioctl_secure_erase(bdev, mode, argp);
|
|
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, bdev_nr_zones(bdev));
|
|
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
|