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 - 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 -- 2.35.1.500.gb896f729e2 -- dm-devel mailing list dm-devel@xxxxxxxxxx https://listman.redhat.com/mailman/listinfo/dm-devel