From mboxrd@z Thu Jan 1 00:00:00 1970 From: KAMEI Hitoshi Subject: [PATCH 0/2] rbd: thick-provision image support Date: Mon, 19 Mar 2018 21:00:33 +0900 Message-ID: <5AAFA661.60103@hitachi.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-2022-JP Content-Transfer-Encoding: 7bit Return-path: Sender: linux-kernel-owner@vger.kernel.org To: idryomov@gmail.com, sage@redhat.com, elder@kernel.org, ceph-devel@vger.kernel.org Cc: linux-kernel@vger.kernel.org List-Id: ceph-devel.vger.kernel.org This patch series adds the thick-provision image support to /drivers/block/rbd.c relating to https://github.com/ceph/ceph/pull/18317. The rbd will not issue the discard operation to thick-provision images, if applied. The rbd should not discard any allocated blocks of thick-provision image to ensure writing data to rbd images. So this patch prevents from discarding allocated blocks on thick-provision image. This patch series creates sysfs file to manipulate thick-provision status. If users write "1" to /sys/bus/rbd/devices//thick, then the image is changed to thick-provision image. And if users write "0" to it, then the image is changed to thin-provision image. I will add the code changing status for the rbd map command. Hitoshi Kamei (2): rbd: RBD_DEV_FLAG_THICK rbd_dev_flags bit rbd: add 'thick' sysfs rbd device attribute Documentation/ABI/testing/sysfs-bus-rbd | 6 ++++++ drivers/block/rbd.c | 37 +++++++++++++++++++++++++++++++++ 2 files changed, 43 insertions(+) -- 2.15.1