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Diffstat (limited to 'block/ioctl.c')
-rw-r--r--block/ioctl.c173
1 files changed, 89 insertions, 84 deletions
diff --git a/block/ioctl.c b/block/ioctl.c
index 38bee321e1fa..c832d639b6e2 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -201,97 +201,41 @@ static int put_u64(unsigned long arg, u64 val)
return put_user(val, (u64 __user *)arg);
}
-static int blkdev_locked_ioctl(struct file *file, struct block_device *bdev,
- unsigned cmd, unsigned long arg)
-{
- struct backing_dev_info *bdi;
- int ret, n;
-
- switch (cmd) {
- case BLKRAGET:
- case BLKFRAGET:
- if (!arg)
- return -EINVAL;
- bdi = blk_get_backing_dev_info(bdev);
- if (bdi == NULL)
- return -ENOTTY;
- return put_long(arg, (bdi->ra_pages * PAGE_CACHE_SIZE) / 512);
- case BLKROGET:
- return put_int(arg, bdev_read_only(bdev) != 0);
- case BLKBSZGET: /* get the logical block size (cf. BLKSSZGET) */
- return put_int(arg, block_size(bdev));
- case BLKSSZGET: /* get block device hardware sector size */
- return put_int(arg, bdev_hardsect_size(bdev));
- case BLKSECTGET:
- return put_ushort(arg, bdev_get_queue(bdev)->max_sectors);
- case BLKRASET:
- case BLKFRASET:
- if(!capable(CAP_SYS_ADMIN))
- return -EACCES;
- bdi = blk_get_backing_dev_info(bdev);
- if (bdi == NULL)
- return -ENOTTY;
- bdi->ra_pages = (arg * 512) / PAGE_CACHE_SIZE;
- return 0;
- case BLKBSZSET:
- /* set the logical block size */
- if (!capable(CAP_SYS_ADMIN))
- return -EACCES;
- if (!arg)
- return -EINVAL;
- if (get_user(n, (int __user *) arg))
- return -EFAULT;
- if (bd_claim(bdev, file) < 0)
- return -EBUSY;
- ret = set_blocksize(bdev, n);
- bd_release(bdev);
- return ret;
- case BLKPG:
- return blkpg_ioctl(bdev, (struct blkpg_ioctl_arg __user *) arg);
- case BLKRRPART:
- return blkdev_reread_part(bdev);
- case BLKGETSIZE:
- if ((bdev->bd_inode->i_size >> 9) > ~0UL)
- return -EFBIG;
- return put_ulong(arg, bdev->bd_inode->i_size >> 9);
- case BLKGETSIZE64:
- return put_u64(arg, bdev->bd_inode->i_size);
- case BLKTRACESTART:
- case BLKTRACESTOP:
- case BLKTRACESETUP:
- case BLKTRACETEARDOWN:
- return blk_trace_ioctl(bdev, cmd, (char __user *) arg);
- }
- return -ENOIOCTLCMD;
-}
-
-int blkdev_driver_ioctl(struct inode *inode, struct file *file,
- struct gendisk *disk, unsigned cmd, unsigned long arg)
+int __blkdev_driver_ioctl(struct block_device *bdev, fmode_t mode,
+ unsigned cmd, unsigned long arg)
{
+ struct gendisk *disk = bdev->bd_disk;
int ret;
- if (disk->fops->unlocked_ioctl)
- return disk->fops->unlocked_ioctl(file, cmd, arg);
- if (disk->fops->ioctl) {
+ if (disk->fops->ioctl)
+ return disk->fops->ioctl(bdev, mode, cmd, arg);
+
+ if (disk->fops->locked_ioctl) {
lock_kernel();
- ret = disk->fops->ioctl(inode, file, cmd, arg);
+ ret = disk->fops->locked_ioctl(bdev, mode, cmd, arg);
unlock_kernel();
return ret;
}
return -ENOTTY;
}
-EXPORT_SYMBOL_GPL(blkdev_driver_ioctl);
+/*
+ * For the record: _GPL here is only because somebody decided to slap it
+ * on the previous export. Sheer idiocy, since it wasn't copyrightable
+ * at all and could be open-coded without any exports by anybody who cares.
+ */
+EXPORT_SYMBOL_GPL(__blkdev_driver_ioctl);
/*
* always keep this in sync with compat_blkdev_ioctl() and
* compat_blkdev_locked_ioctl()
*/
-int blkdev_ioctl(struct inode *inode, struct file *file, unsigned cmd,
+int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
unsigned long arg)
{
- struct block_device *bdev = inode->i_bdev;
struct gendisk *disk = bdev->bd_disk;
+ struct backing_dev_info *bdi;
+ loff_t size;
int ret, n;
switch(cmd) {
@@ -299,7 +243,7 @@ int blkdev_ioctl(struct inode *inode, struct file *file, unsigned cmd,
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
- ret = blkdev_driver_ioctl(inode, file, disk, cmd, arg);
+ ret = __blkdev_driver_ioctl(bdev, mode, cmd, arg);
/* -EINVAL to handle old uncorrected drivers */
if (ret != -EINVAL && ret != -ENOTTY)
return ret;
@@ -311,7 +255,7 @@ int blkdev_ioctl(struct inode *inode, struct file *file, unsigned cmd,
return 0;
case BLKROSET:
- ret = blkdev_driver_ioctl(inode, file, disk, cmd, arg);
+ ret = __blkdev_driver_ioctl(bdev, mode, cmd, arg);
/* -EINVAL to handle old uncorrected drivers */
if (ret != -EINVAL && ret != -ENOTTY)
return ret;
@@ -327,7 +271,7 @@ int blkdev_ioctl(struct inode *inode, struct file *file, unsigned cmd,
case BLKDISCARD: {
uint64_t range[2];
- if (!(file->f_mode & FMODE_WRITE))
+ if (!(mode & FMODE_WRITE))
return -EBADF;
if (copy_from_user(range, (void __user *)arg, sizeof(range)))
@@ -357,14 +301,75 @@ int blkdev_ioctl(struct inode *inode, struct file *file, unsigned cmd,
return -EFAULT;
return 0;
}
- }
-
- lock_kernel();
- ret = blkdev_locked_ioctl(file, bdev, cmd, arg);
- unlock_kernel();
- if (ret != -ENOIOCTLCMD)
+ case BLKRAGET:
+ case BLKFRAGET:
+ if (!arg)
+ return -EINVAL;
+ bdi = blk_get_backing_dev_info(bdev);
+ if (bdi == NULL)
+ return -ENOTTY;
+ return put_long(arg, (bdi->ra_pages * PAGE_CACHE_SIZE) / 512);
+ case BLKROGET:
+ return put_int(arg, bdev_read_only(bdev) != 0);
+ case BLKBSZGET: /* get the logical block size (cf. BLKSSZGET) */
+ return put_int(arg, block_size(bdev));
+ case BLKSSZGET: /* get block device hardware sector size */
+ return put_int(arg, bdev_hardsect_size(bdev));
+ case BLKSECTGET:
+ return put_ushort(arg, bdev_get_queue(bdev)->max_sectors);
+ case BLKRASET:
+ case BLKFRASET:
+ if(!capable(CAP_SYS_ADMIN))
+ return -EACCES;
+ bdi = blk_get_backing_dev_info(bdev);
+ if (bdi == NULL)
+ return -ENOTTY;
+ lock_kernel();
+ bdi->ra_pages = (arg * 512) / PAGE_CACHE_SIZE;
+ unlock_kernel();
+ return 0;
+ case BLKBSZSET:
+ /* set the logical block size */
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
+ if (!arg)
+ return -EINVAL;
+ if (get_user(n, (int __user *) arg))
+ return -EFAULT;
+ if (!(mode & FMODE_EXCL) && bd_claim(bdev, &bdev) < 0)
+ return -EBUSY;
+ ret = set_blocksize(bdev, n);
+ if (!(mode & FMODE_EXCL))
+ bd_release(bdev);
return ret;
-
- return blkdev_driver_ioctl(inode, file, disk, cmd, arg);
+ case BLKPG:
+ lock_kernel();
+ ret = blkpg_ioctl(bdev, (struct blkpg_ioctl_arg __user *) arg);
+ unlock_kernel();
+ break;
+ case BLKRRPART:
+ lock_kernel();
+ ret = blkdev_reread_part(bdev);
+ unlock_kernel();
+ break;
+ case BLKGETSIZE:
+ size = bdev->bd_inode->i_size;
+ if ((size >> 9) > ~0UL)
+ return -EFBIG;
+ return put_ulong(arg, size >> 9);
+ case BLKGETSIZE64:
+ return put_u64(arg, bdev->bd_inode->i_size);
+ case BLKTRACESTART:
+ case BLKTRACESTOP:
+ case BLKTRACESETUP:
+ case BLKTRACETEARDOWN:
+ lock_kernel();
+ ret = blk_trace_ioctl(bdev, cmd, (char __user *) arg);
+ unlock_kernel();
+ break;
+ default:
+ ret = __blkdev_driver_ioctl(bdev, mode, cmd, arg);
+ }
+ return ret;
}
EXPORT_SYMBOL_GPL(blkdev_ioctl);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-04 01:37:55 +0000