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| author | Nikos Tsironis <ntsironis@arrikto.com> | 2019-09-11 16:36:40 +0200 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2019-09-12 15:32:31 +0200 |
| commit | 7431b7835f554f8608b415a02cf3c3f086309e02 (patch) | |
| tree | 8362b989838a798fb1e58fe51dfb348759a0c810 /drivers/md/Makefile | |
| parent | dm raid: fix updating of max_discard_sectors limit (diff) | |
| download | linux-7431b7835f554f8608b415a02cf3c3f086309e02.tar.xz linux-7431b7835f554f8608b415a02cf3c3f086309e02.zip | |
dm: add clone target
Add the dm-clone target, which allows cloning of arbitrary block
devices.
dm-clone produces a one-to-one copy of an existing, read-only source
device into a writable destination device: It presents a virtual block
device which makes all data appear immediately, and redirects reads and
writes accordingly.
The main use case of dm-clone is to clone a potentially remote,
high-latency, read-only, archival-type block device into a writable,
fast, primary-type device for fast, low-latency I/O. The cloned device
is visible/mountable immediately and the copy of the source device to
the destination device happens in the background, in parallel with user
I/O.
When the cloning completes, the dm-clone table can be removed altogether
and be replaced, e.g., by a linear table, mapping directly to the
destination device.
For further information and examples of how to use dm-clone, please read
Documentation/admin-guide/device-mapper/dm-clone.rst
Suggested-by: Vangelis Koukis <vkoukis@arrikto.com>
Co-developed-by: Ilias Tsitsimpis <iliastsi@arrikto.com>
Signed-off-by: Ilias Tsitsimpis <iliastsi@arrikto.com>
Signed-off-by: Nikos Tsironis <ntsironis@arrikto.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/Makefile')
| -rw-r--r-- | drivers/md/Makefile | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/md/Makefile b/drivers/md/Makefile index 0d922335335c..d91a7edcd2ab 100644 --- a/drivers/md/Makefile +++ b/drivers/md/Makefile @@ -18,6 +18,7 @@ dm-cache-y += dm-cache-target.o dm-cache-metadata.o dm-cache-policy.o \ dm-cache-background-tracker.o dm-cache-smq-y += dm-cache-policy-smq.o dm-era-y += dm-era-target.o +dm-clone-y += dm-clone-target.o dm-clone-metadata.o dm-verity-y += dm-verity-target.o md-mod-y += md.o md-bitmap.o raid456-y += raid5.o raid5-cache.o raid5-ppl.o @@ -65,6 +66,7 @@ obj-$(CONFIG_DM_VERITY) += dm-verity.o obj-$(CONFIG_DM_CACHE) += dm-cache.o obj-$(CONFIG_DM_CACHE_SMQ) += dm-cache-smq.o obj-$(CONFIG_DM_ERA) += dm-era.o +obj-$(CONFIG_DM_CLONE) += dm-clone.o obj-$(CONFIG_DM_LOG_WRITES) += dm-log-writes.o obj-$(CONFIG_DM_INTEGRITY) += dm-integrity.o obj-$(CONFIG_DM_ZONED) += dm-zoned.o |