The patch series covers the points discussed in November 2021 virtual call
[LSF/MM/BFP TOPIC] Storage: Copy Offload[0].
We have covered the Initial agreed requirements in this patchset.
Patchset borrows Mikulas's token based approach for 2 bdev
implementation.
This is on top of our previous patchset v1[1].
Overall series supports –
1. Driver
- NVMe Copy command (single NS), including support in nvme-target (for
block and file backend)
2. Block layer
- Block-generic copy (REQ_COPY flag), with interface accommodating
two block-devs, and multi-source/destination interface
- Emulation, when offload is natively absent
- dm-linear support (for cases not requiring split)
3. User-interface
- new ioctl
4. In-kernel user
- dm-kcopyd
[0]
https://lore.kernel.org/linux-nvme/CA+1E3rJ7BZ7LjQXXTdX+-0Edz=zt14mmpgmivczugb33c60...@mail.gmail.com/
[1]
https://lore.kernel.org/linux-block/20210817101423.12367-1-selvakuma...@samsung.com/
Arnav Dawn (1):
nvmet: add copy command support for bdev and file ns
Nitesh Shetty (6):
block: Introduce queue limits for copy-offload support
block: Add copy offload support infrastructure
block: Introduce a new ioctl for copy
block: add emulation for copy
dm: Add support for copy offload.
dm: Enable copy offload for dm-linear target
SelvaKumar S (3):
block: make bio_map_kern() non static
nvme: add copy support
dm kcopyd: use copy offload support
block/blk-lib.c | 335 ++++++++++++++++++++++++++++++
block/blk-map.c | 2 +-
block/blk-settings.c | 6 +
block/blk-sysfs.c | 51 +++++
block/blk.h | 2 +
block/ioctl.c | 37 ++++
drivers/md/dm-kcopyd.c | 57 ++++-
drivers/md/dm-linear.c | 1 +
drivers/md/dm-table.c | 43 ++++
drivers/md/dm.c | 6 +
drivers/nvme/host/core.c | 121 ++++++++++-
drivers/nvme/host/nvme.h | 7 +
drivers/nvme/host/pci.c | 9 +
drivers/nvme/host/trace.c | 19 ++
drivers/nvme/target/admin-cmd.c | 8 +-
drivers/nvme/target/io-cmd-bdev.c | 66 ++++++
drivers/nvme/target/io-cmd-file.c | 48 +++++
include/linux/blk_types.h | 20 ++
include/linux/blkdev.h | 17 ++
include/linux/device-mapper.h | 5 +
include/linux/nvme.h | 43 +++-
include/uapi/linux/fs.h | 23 ++
22 files changed, 912 insertions(+), 14 deletions(-)
--
2.30.0-rc0
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