Re: [PATCH v2 0/5] Add support for block disk resize notification

Singh, Balbir
2020-03-03T04:04:08Z

On Tue, 2020-02-25 at 20:01 +0000, Balbir Singh wrote:
> Allow block/genhd to notify user space about disk size changes using a
> new helper set_capacity_revalidate_and_notify(), which is a wrapper
> on top of set_capacity(). set_capacity_revalidate_and_notify() will only
> notify
> iff the current capacity or the target capacity is not zero and the
> capacity really changes.
>
> Background:
>
> As a part of a patch to allow sending the RESIZE event on disk capacity
> change, Christoph (hch@lst.de) requested that the patch be made generic
> and the hacks for virtio block and xen block devices be removed and
> merged via a generic helper.
>
> This series consists of 5 changes. The first one adds the basic
> support for changing the size and notifying. The follow up patches
> are per block subsystem changes. Other block drivers can add their
> changes as necessary on top of this series. Since not all devices
> are resizable, the default was to add a new API and let users
> slowly convert over as needed.
>
> Testing:
> 1. I did some basic testing with an NVME device, by resizing it in
> the backend and ensured that udevd received the event.
>
>
> Changelog v2:
> - Rename disk_set_capacity to set_capacity_revalidate_and_notify
> - set_capacity_revalidate_and_notify can call revalidate disk
> if needed, a new bool parameter is passed (suggested by Bob Liu)
>

Ping? It's not an urgent patchset, I am happy to wait if nothing else is
needed.

Balbir Singh