On 09/03/2014 03:36 PM, Miao Xie wrote:
> The original code need scan the devices and build the fs device list by the user
> tool by udev or users' selves. It is flexible. But if someone re-install the
> filesystem module, and forget to scan the devices by himself, or we plug some
> devices with btrfs, but udev thread is blocked and doesn't register the disk
> into btrfs in time, the filesystem would report that "can not open some device"
> when mounting the filesystem, it was uncomfortable, this patch fixes this problem
> by scanning all the devices if we find the number of devices is not right when
> we mount the filesystem.
>
> Signed-off-by: Miao Xie <miaox@xxxxxxxxxxxxxx>
[....]
> +
> +void btrfs_scan_all_devices(void *holder)
> +{
> + struct class_dev_iter iter;
> + struct device *dev;
> + struct gendisk *disk;
> +
> + mutex_lock(&uuid_mutex);
> + class_dev_iter_init(&iter, &block_class, NULL, &disk_type);
> + while ((dev = class_dev_iter_next(&iter))) {
> + disk = dev_to_disk(dev);
> +
> + if (!get_capacity(disk) ||
> + (!disk_max_parts(disk) &&
> + (disk->flags & GENHD_FL_REMOVABLE)))
^^^^^^^^^^^^^^^^^^
> + continue;
> +
> + if (disk->flags & GENHD_FL_SUPPRESS_PARTITION_INFO)
> + continue;
Hi, could you elaborate why a removable disk should be not scan-ned ? How
a removble usb disk is classified ?
Thanks.
G.Baroncelli
[...]
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