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Date: Mon, 14 Feb 2022 13:29:50 +0530
From: Nitesh Shetty <nj.shetty@...sung.com>
To: unlisted-recipients:; (no To-header on input)
Cc: javier@...igon.com, chaitanyak@...dia.com,
linux-block@...r.kernel.org, linux-scsi@...r.kernel.org,
dm-devel@...hat.com, linux-nvme@...ts.infradead.org,
linux-fsdevel@...r.kernel.org, axboe@...nel.dk,
msnitzer@...hat.com, bvanassche@....org,
martin.petersen@...cle.com, hare@...e.de, kbusch@...nel.org,
hch@....de, Frederick.Knight@...app.com, osandov@...com,
lsf-pc@...ts.linux-foundation.org, djwong@...nel.org,
josef@...icpanda.com, clm@...com, dsterba@...e.com, tytso@....edu,
jack@...e.com, joshi.k@...sung.com, arnav.dawn@...sung.com,
nitheshshetty@...il.com, Nitesh Shetty <nj.shetty@...sung.com>,
Alasdair Kergon <agk@...hat.com>,
Mike Snitzer <snitzer@...hat.com>,
Sagi Grimberg <sagi@...mberg.me>,
James Smart <james.smart@...adcom.com>,
Chaitanya Kulkarni <kch@...dia.com>,
Alexander Viro <viro@...iv.linux.org.uk>,
linux-kernel@...r.kernel.org
Subject: [PATCH v3 00/10] Add Copy offload support
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.
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=zT14mmPGMiVCzUgB33C60tbQ@mail.gmail.com/
Changes in v3:
- fixed possible race condition reported by Damien Le Moal
- new sysfs controls as suggested by Damien Le Moal
- fixed possible memory leak reported by Dan Carpenter, lkp
- minor fixes
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 offload support
dm kcopyd: use copy offload support
block/blk-lib.c | 346 ++++++++++++++++++++++++++++++
block/blk-map.c | 2 +-
block/blk-settings.c | 59 +++++
block/blk-sysfs.c | 138 ++++++++++++
block/blk.h | 2 +
block/ioctl.c | 32 +++
drivers/md/dm-kcopyd.c | 55 ++++-
drivers/md/dm-linear.c | 1 +
drivers/md/dm-table.c | 45 ++++
drivers/md/dm.c | 6 +
drivers/nvme/host/core.c | 119 +++++++++-
drivers/nvme/host/fc.c | 4 +
drivers/nvme/host/nvme.h | 7 +
drivers/nvme/host/pci.c | 9 +
drivers/nvme/host/rdma.c | 6 +
drivers/nvme/host/tcp.c | 8 +
drivers/nvme/host/trace.c | 19 ++
drivers/nvme/target/admin-cmd.c | 8 +-
drivers/nvme/target/io-cmd-bdev.c | 65 ++++++
drivers/nvme/target/io-cmd-file.c | 48 +++++
include/linux/blk_types.h | 21 ++
include/linux/blkdev.h | 17 ++
include/linux/device-mapper.h | 5 +
include/linux/nvme.h | 43 +++-
include/uapi/linux/fs.h | 23 ++
25 files changed, 1074 insertions(+), 14 deletions(-)
base-commit: 23a3fe5e6bb58304e662c604b86bc1264453e888
--
2.30.0-rc0
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