return true;
}
-
-static int blkdev_daxset(struct block_device *bdev, unsigned long argp)
-{
- unsigned long arg;
- int rc = 0;
-
- if (!capable(CAP_SYS_ADMIN))
- return -EACCES;
-
- if (get_user(arg, (int __user *)(argp)))
- return -EFAULT;
- arg = !!arg;
- if (arg == !!(bdev->bd_inode->i_flags & S_DAX))
- return 0;
-
- if (arg)
- arg = S_DAX;
-
- if (arg && !blkdev_dax_capable(bdev))
- return -ENOTTY;
-
- mutex_lock(&bdev->bd_inode->i_mutex);
- if (bdev->bd_map_count == 0)
- inode_set_flags(bdev->bd_inode, arg, S_DAX);
- else
- rc = -EBUSY;
- mutex_unlock(&bdev->bd_inode->i_mutex);
- return rc;
-}
-#else
-static int blkdev_daxset(struct block_device *bdev, int arg)
-{
- if (arg)
- return -ENOTTY;
- return 0;
-}
#endif
static int blkdev_flushbuf(struct block_device *bdev, fmode_t mode,
case BLKTRACESETUP:
case BLKTRACETEARDOWN:
return blk_trace_ioctl(bdev, cmd, argp);
- case BLKDAXSET:
- return blkdev_daxset(bdev, arg);
case BLKDAXGET:
return put_int(arg, !!(bdev->bd_inode->i_flags & S_DAX));
break;