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=zT14mmPGMiVCzUgB33C60tbQ@xxxxxxxxxxxxxx/ [1] https://lore.kernel.org/linux-block/20210817101423.12367-1-selvakuma.s1@xxxxxxxxxxx/ 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
