struct disk_part_iter piter;
long long start, length;
int partno;
- int err;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
disk_part_iter_exit(&piter);
/* all seems OK */
- err = add_partition(disk, partno, start, length,
- ADDPART_FLAG_NONE);
+ part = add_partition(disk, partno, start, length,
+ ADDPART_FLAG_NONE);
mutex_unlock(&bdev->bd_mutex);
- return err;
+ return IS_ERR(part) ? PTR_ERR(part) : 0;
case BLKPG_DEL_PARTITION:
part = disk_get_part(disk, partno);
if (!part)
return res;
}
-static void blk_ioc_discard_endio(struct bio *bio, int err)
-{
- if (err) {
- if (err == -EOPNOTSUPP)
- set_bit(BIO_EOPNOTSUPP, &bio->bi_flags);
- clear_bit(BIO_UPTODATE, &bio->bi_flags);
- }
- complete(bio->bi_private);
-}
-
static int blk_ioctl_discard(struct block_device *bdev, uint64_t start,
uint64_t len)
{
- struct request_queue *q = bdev_get_queue(bdev);
- int ret = 0;
-
if (start & 511)
return -EINVAL;
if (len & 511)
if (start + len > (bdev->bd_inode->i_size >> 9))
return -EINVAL;
-
- if (!q->prepare_discard_fn)
- return -EOPNOTSUPP;
-
- while (len && !ret) {
- DECLARE_COMPLETION_ONSTACK(wait);
- struct bio *bio;
-
- bio = bio_alloc(GFP_KERNEL, 0);
- if (!bio)
- return -ENOMEM;
-
- bio->bi_end_io = blk_ioc_discard_endio;
- bio->bi_bdev = bdev;
- bio->bi_private = &wait;
- bio->bi_sector = start;
-
- if (len > q->max_hw_sectors) {
- bio->bi_size = q->max_hw_sectors << 9;
- len -= q->max_hw_sectors;
- start += q->max_hw_sectors;
- } else {
- bio->bi_size = len << 9;
- len = 0;
- }
- submit_bio(DISCARD_NOBARRIER, bio);
-
- wait_for_completion(&wait);
-
- if (bio_flagged(bio, BIO_EOPNOTSUPP))
- ret = -EOPNOTSUPP;
- else if (!bio_flagged(bio, BIO_UPTODATE))
- ret = -EIO;
- bio_put(bio);
- }
- return ret;
+ return blkdev_issue_discard(bdev, start, len, GFP_KERNEL,
+ DISCARD_FL_WAIT);
}
static int put_ushort(unsigned long arg, unsigned short val)
return put_user(val, (int __user *)arg);
}
+static int put_uint(unsigned long arg, unsigned int val)
+{
+ return put_user(val, (unsigned int __user *)arg);
+}
+
static int put_long(unsigned long arg, long val)
{
return put_user(val, (long __user *)arg);
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 ret;
- fmode_t mode = 0;
- if (file) {
- mode = file->f_mode;
- if (file->f_flags & O_NDELAY)
- mode |= FMODE_NDELAY_NOW;
- }
-
- if (disk->fops->__unlocked_ioctl)
- return disk->fops->__unlocked_ioctl(file, cmd, arg);
-
- if (disk->fops->__ioctl) {
- lock_kernel();
- ret = disk->fops->__ioctl(inode, file, cmd, arg);
- unlock_kernel();
- return ret;
- }
-
- return __blkdev_driver_ioctl(inode->i_bdev, mode, cmd, arg);
-}
-EXPORT_SYMBOL_GPL(blkdev_driver_ioctl);
-
int __blkdev_driver_ioctl(struct block_device *bdev, fmode_t mode,
unsigned cmd, unsigned long arg)
{
struct gendisk *disk = bdev->bd_disk;
int ret;
- /* you bet it'll go away by the end of patch series */
- struct file fake_file = {};
- struct dentry fake_dentry = {};
- fake_file.f_mode = mode;
- fake_file.f_path.dentry = &fake_dentry;
- fake_dentry.d_inode = bdev->bd_inode;
-
- if (disk->fops->__unlocked_ioctl)
- return disk->fops->__unlocked_ioctl(&fake_file, cmd, arg);
-
- if (disk->fops->__ioctl) {
- lock_kernel();
- ret = disk->fops->__ioctl(bdev->bd_inode, &fake_file, cmd, arg);
- unlock_kernel();
- return ret;
- }
if (disk->fops->ioctl)
return disk->fops->ioctl(bdev, mode, cmd, arg);
* 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) {
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;
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;
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)))
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 block device soft block size (cf. BLKSSZGET) */
+ return put_int(arg, block_size(bdev));
+ case BLKSSZGET: /* get block device logical block size */
+ return put_int(arg, bdev_logical_block_size(bdev));
+ case BLKPBSZGET: /* get block device physical block size */
+ return put_uint(arg, bdev_physical_block_size(bdev));
+ case BLKIOMIN:
+ return put_uint(arg, bdev_io_min(bdev));
+ case BLKIOOPT:
+ return put_uint(arg, bdev_io_opt(bdev));
+ case BLKALIGNOFF:
+ return put_int(arg, bdev_alignment_offset(bdev));
+ case BLKSECTGET:
+ return put_ushort(arg, queue_max_sectors(bdev_get_queue(bdev)));
+ 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 (!(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);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff