On 4/26/22 19:12, Nitesh Shetty wrote: > 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) It would also be nice to have copy offload emulation in null_blk for testing. > > 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 > - copy_file_range for zonefs > > 4. In-kernel user > - dm-kcopyd > - copy_file_range in zonefs > > For zonefs copy_file_range - Seems we cannot levearge fstest here. Limited > testing is done at this point using a custom application for unit testing. > > Appreciate the inputs on plumbing and how to test this further? > Perhaps some of it can be discussed during LSF/MM too. > > [0] https://lore.kernel.org/linux-nvme/CA+1E3rJ7BZ7LjQXXTdX+-0Edz=zT14mmPGMiVCzUgB33C60tbQ@xxxxxxxxxxxxxx/ > > Changes in v4: > - added copy_file_range support for zonefs > - added documentaion about new sysfs entries > - incorporated review comments on v3 > - minor fixes > > > Arnav Dawn (2): > nvmet: add copy command support for bdev and file ns > fs: add support for copy file range in zonefs > > Nitesh Shetty (7): > 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 > nvme: add copy offload support > dm: Add support for copy offload. > dm: Enable copy offload for dm-linear target > > SelvaKumar S (1): > dm kcopyd: use copy offload support > > Documentation/ABI/stable/sysfs-block | 83 +++++++ > block/blk-lib.c | 358 +++++++++++++++++++++++++++ > 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 | 116 ++++++++- > drivers/nvme/host/fc.c | 4 + > drivers/nvme/host/nvme.h | 7 + > drivers/nvme/host/pci.c | 25 ++ > drivers/nvme/host/rdma.c | 6 + > drivers/nvme/host/tcp.c | 14 ++ > 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 | 49 ++++ > fs/zonefs/super.c | 178 ++++++++++++- > fs/zonefs/zonefs.h | 1 + > 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 ++ > 28 files changed, 1367 insertions(+), 15 deletions(-) > > > base-commit: e7d6987e09a328d4a949701db40ef63fbb970670 -- Damien Le Moal Western Digital Research
