2854 	struct btrfs_ioctl_fs_info_args *fi_args;  in btrfs_ioctl_fs_info()  local
2860 	fi_args = memdup_user(arg, sizeof(*fi_args));  in btrfs_ioctl_fs_info()
2861 	if (IS_ERR(fi_args))  in btrfs_ioctl_fs_info()
2862 		return PTR_ERR(fi_args);  in btrfs_ioctl_fs_info()
2864 	flags_in = fi_args->flags;  in btrfs_ioctl_fs_info()
2865 	memset(fi_args, 0, sizeof(*fi_args));  in btrfs_ioctl_fs_info()
2868 	fi_args->num_devices = fs_devices->num_devices;  in btrfs_ioctl_fs_info()
2871 		if (device->devid > fi_args->max_id)  in btrfs_ioctl_fs_info()
2872 			fi_args->max_id = device->devid;  in btrfs_ioctl_fs_info()
2876 	memcpy(&fi_args->fsid, fs_devices->fsid, sizeof(fi_args->fsid));  in btrfs_ioctl_fs_info()
2877 	fi_args->nodesize = fs_info->nodesize;  in btrfs_ioctl_fs_info()
2878 	fi_args->sectorsize = fs_info->sectorsize;  in btrfs_ioctl_fs_info()
2879 	fi_args->clone_alignment = fs_info->sectorsize;  in btrfs_ioctl_fs_info()
2882 		fi_args->csum_type = btrfs_super_csum_type(fs_info->super_copy);  in btrfs_ioctl_fs_info()
2883 		fi_args->csum_size = btrfs_super_csum_size(fs_info->super_copy);  in btrfs_ioctl_fs_info()
2884 		fi_args->flags |= BTRFS_FS_INFO_FLAG_CSUM_INFO;  in btrfs_ioctl_fs_info()
2888 		fi_args->generation = btrfs_get_fs_generation(fs_info);  in btrfs_ioctl_fs_info()
2889 		fi_args->flags |= BTRFS_FS_INFO_FLAG_GENERATION;  in btrfs_ioctl_fs_info()
2893 		memcpy(&fi_args->metadata_uuid, fs_devices->metadata_uuid,  in btrfs_ioctl_fs_info()
2894 		       sizeof(fi_args->metadata_uuid));  in btrfs_ioctl_fs_info()
2895 		fi_args->flags |= BTRFS_FS_INFO_FLAG_METADATA_UUID;  in btrfs_ioctl_fs_info()
2898 	if (copy_to_user(arg, fi_args, sizeof(*fi_args)))  in btrfs_ioctl_fs_info()
2901 	kfree(fi_args);  in btrfs_ioctl_fs_info()