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Commit 757ecf40 authored by Jan Kara's avatar Jan Kara Committed by Jens Axboe
Browse files

loop: Push loop_ctl_mutex down to loop_set_fd() 



Push lo_ctl_mutex down to loop_set_fd(). We will need this to be able to
call loop_reread_partitions() without lo_ctl_mutex.

Signed-off-by: default avatarJan Kara <jack@suse.cz>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 550df5fd

drivers/block/loop.c

+14 −12
Original line number Diff line number Diff line
@@ -918,13 +918,17 @@ static int loop_set_fd(struct loop_device *lo, fmode_t mode, 
	if (!file)

		goto out;



	error = mutex_lock_killable_nested(&loop_ctl_mutex, 1);

	if (error)

		goto out_putf;



	error = -EBUSY;

	if (lo->lo_state != Lo_unbound)

		goto out_putf;

		goto out_unlock;



	error = loop_validate_file(file, bdev);

	if (error)

		goto out_putf;

		goto out_unlock;



	mapping = file->f_mapping;

	inode = mapping->host;
@@ -936,10 +940,10 @@ static int loop_set_fd(struct loop_device *lo, fmode_t mode, 
	error = -EFBIG;

	size = get_loop_size(lo, file);

	if ((loff_t)(sector_t)size != size)

		goto out_putf;

		goto out_unlock;

	error = loop_prepare_queue(lo);

	if (error)

		goto out_putf;

		goto out_unlock;



	error = 0;
@@ -978,8 +982,11 @@ static int loop_set_fd(struct loop_device *lo, fmode_t mode, 
	 * put /dev/loopXX inode. Later in __loop_clr_fd() we bdput(bdev).

	 */

	bdgrab(bdev);

	mutex_unlock(&loop_ctl_mutex);

	return 0;



out_unlock:

	mutex_unlock(&loop_ctl_mutex);

out_putf:

	fput(file);

out:
@@ -1460,12 +1467,7 @@ static int lo_ioctl(struct block_device *bdev, fmode_t mode, 


	switch (cmd) {

	case LOOP_SET_FD:

		err = mutex_lock_killable_nested(&loop_ctl_mutex, 1);

		if (err)

			return err;

		err = loop_set_fd(lo, mode, bdev, arg);

		mutex_unlock(&loop_ctl_mutex);

		break;

		return loop_set_fd(lo, mode, bdev, arg);

	case LOOP_CHANGE_FD:

		err = mutex_lock_killable_nested(&loop_ctl_mutex, 1);

		if (err)