#include <linux/capability.h>
#include <linux/blkdev.h>
+#include <linux/gfp.h>
#include <linux/blkpg.h>
#include <linux/hdreg.h>
#include <linux/backing-dev.h>
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);
* 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;
- fmode_t mode = 0;
- if (file) {
- mode = file->f_mode;
- if (file->f_flags & O_NDELAY)
- mode |= FMODE_NDELAY_NOW;
- }
switch(cmd) {
case BLKFLSBUF:
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) */
+ case BLKBSZGET: /* get block device soft 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 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 BLKDISCARDZEROES:
+ return put_uint(arg, bdev_discard_zeroes_data(bdev));
case BLKSECTGET:
- return put_ushort(arg, bdev_get_queue(bdev)->max_sectors);
+ return put_ushort(arg, queue_max_sectors(bdev_get_queue(bdev)));
case BLKRASET:
case BLKFRASET:
if(!capable(CAP_SYS_ADMIN))
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 */
return -EINVAL;
if (get_user(n, (int __user *) arg))
return -EFAULT;
- if (bd_claim(bdev, file) < 0)
+ if (!(mode & FMODE_EXCL) && bd_claim(bdev, &bdev) < 0)
return -EBUSY;
ret = set_blocksize(bdev, n);
- bd_release(bdev);
+ if (!(mode & FMODE_EXCL))
+ bd_release(bdev);
return ret;
case BLKPG:
lock_kernel();