From patchwork Fri Nov 24 16:59:32 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sergei Shtepa X-Patchwork-Id: 13468022 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="Vz45gGWB" Received: from out-173.mta0.migadu.com (out-173.mta0.migadu.com [IPv6:2001:41d0:1004:224b::ad]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 69D3719BB; Fri, 24 Nov 2023 09:00:26 -0800 (PST) X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1700845224; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=3H2EngB4IC7J9sBiro1fbNUKQKRJyLxYEzCizNHIL5o=; b=Vz45gGWBhO5z+XKwoOw0E6D48Hta7AOYAEttidaa3w/z4W5sITlJaeXjSXd85Nt+hl3kCU aTXHFwqMqwV7hj0k8jUi9LEvpxFLXXr4H0TTC/BuUMrA9KKE5gAvN0U8zPgoak0/Y9qGD0 EHNGghNq4QYnKjn5s5T4+I7bOJV0p9k= From: Sergei Shtepa To: axboe@kernel.dk, hch@infradead.org, corbet@lwn.net, snitzer@kernel.org Cc: mingo@redhat.com, peterz@infradead.org, juri.lelli@redhat.com, viro@zeniv.linux.org.uk, brauner@kernel.org, linux-block@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, Sergei Shtepa Subject: [PATCH v6 10/11] blksnap: Kconfig and Makefile Date: Fri, 24 Nov 2023 17:59:32 +0100 Message-Id: <20231124165933.27580-11-sergei.shtepa@linux.dev> In-Reply-To: <20231124165933.27580-1-sergei.shtepa@linux.dev> References: <20231124165933.27580-1-sergei.shtepa@linux.dev> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT From: Sergei Shtepa Allows to build a module and add the blksnap to the kernel tree. Co-developed-by: Christoph Hellwig Signed-off-by: Christoph Hellwig Signed-off-by: Sergei Shtepa --- drivers/block/Kconfig | 2 ++ drivers/block/Makefile | 2 ++ drivers/block/blksnap/Kconfig | 31 +++++++++++++++++++++++++++++++ drivers/block/blksnap/Makefile | 15 +++++++++++++++ 4 files changed, 50 insertions(+) create mode 100644 drivers/block/blksnap/Kconfig create mode 100644 drivers/block/blksnap/Makefile diff --git a/drivers/block/Kconfig b/drivers/block/Kconfig index 5b9d4aaebb81..74d2d55526a3 100644 --- a/drivers/block/Kconfig +++ b/drivers/block/Kconfig @@ -404,4 +404,6 @@ config BLKDEV_UBLK_LEGACY_OPCODES source "drivers/block/rnbd/Kconfig" +source "drivers/block/blksnap/Kconfig" + endif # BLK_DEV diff --git a/drivers/block/Makefile b/drivers/block/Makefile index 101612cba303..9a2a9a56a247 100644 --- a/drivers/block/Makefile +++ b/drivers/block/Makefile @@ -40,3 +40,5 @@ obj-$(CONFIG_BLK_DEV_NULL_BLK) += null_blk/ obj-$(CONFIG_BLK_DEV_UBLK) += ublk_drv.o swim_mod-y := swim.o swim_asm.o + +obj-$(CONFIG_BLKSNAP) += blksnap/ diff --git a/drivers/block/blksnap/Kconfig b/drivers/block/blksnap/Kconfig new file mode 100644 index 000000000000..f52272c12e1b --- /dev/null +++ b/drivers/block/blksnap/Kconfig @@ -0,0 +1,31 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Block device snapshot module configuration +# + +config BLKSNAP + tristate "Block Devices Snapshots Module (blksnap)" + help + Allow to create snapshots and track block changes for block devices. + Designed for creating backups for block devices. Snapshots are + temporary and are released when backup is completed. Change block + tracking allows to create incremental or differential backups. + +config BLKSNAP_DIFF_BLKDEV + bool "Use an optimized algorithm to store difference on a block device" + depends on BLKSNAP + default y + help + The difference storage for a snapshot can be a regular file or a + block device. We can work with a block device through the interface + of a regular file. However, direct management of I/O units should + allow for higher performance. + +config BLKSNAP_CHUNK_DIFF_BIO_SYNC + bool "Use a synchronous I/O unit processing algorithm for the snapshot image" + depends on BLKSNAP + default n + help + Theoretical asynchronous algorithm for processing I/O units should + have higher performance. However, an attempt to confirm this on test + runs did not bring any results. diff --git a/drivers/block/blksnap/Makefile b/drivers/block/blksnap/Makefile new file mode 100644 index 000000000000..8d528b95579a --- /dev/null +++ b/drivers/block/blksnap/Makefile @@ -0,0 +1,15 @@ +# SPDX-License-Identifier: GPL-2.0 + +blksnap-y := \ + cbt_map.o \ + chunk.o \ + diff_area.o \ + diff_buffer.o \ + diff_storage.o \ + event_queue.o \ + main.o \ + snapimage.o \ + snapshot.o \ + tracker.o + +obj-$(CONFIG_BLKSNAP) += blksnap.o