[PATCH 00/19 V4] nvme-rdma/nvmet-rdma: Add metadata/T10-PI support

[Max Gurtovoy <maxg@mellanox.com>]

Hello Sagi, Christoph, Keith, Martin and Co

This patchset adds metadata (T10-PI) support for NVMeoF/RDMA host side and
target side, using signature verbs API. This set starts with a few preparation
commits to the NVMe host core layer. It continues with NVMeoF/RDMA host
implementation + few preparation commits to the RDMA/rw API and to NVMe target
core layer. The patchset ends with NVMeoF/RDMA target implementation.

Configuration:
Host:
 - nvme connect --pi_enable --transport=rdma --traddr=10.0.1.1 --nqn=test-nvme

Target:
 - echo 1 > /config/nvmet/subsystems/${NAME}/attr_pi_enable
 - echo 1 > /config/nvmet/ports/${PORT_NUM}/param_pi_enable

The code was tested using Mellanox's ConnectX-4/ConnectX-5 HCAs.
This series applies on top of nvme_5.7 branch cleanly.

Changes from v3:
 - Added Reviewed-by signatures
 - New RDMA/rw patch (Patch 17/19)
 - Add mdts setting op for controllers (Patches 14/19, 18/19)
 - Rename NVME_NS_DIX_SUPPORTED to NVME_NS_MD_HOST_SUPPORTED and
   NVME_NS_DIF_SUPPORTED to NVME_NS_MD_CTRL_SUPPORTED (Patch 01/19)
 - Split "nvme: Introduce namespace features flag" patch (patch 02/19)
 - Rename nvmet_rdma_set_diff_domain to nvmet_rdma_set_sig_domain
   and nvme_rdma_set_diff_domain to nvme_rdma_set_sig_domain
   (Patches 08/19, 19/19)
 - Remove ns parameter from nvme_rdma_set_sig_domain/nvmet_rdma_set_sig_domain
   functions (patch 08/19, 19/19)
 - Rebase over nvme-5.7 branch

Changes from v2:
 - Convert the virtual start sector (which passed to bip_set_seed function)
   to be in integrity interval units (Patch 14/15)
 - Clarify some commit messages

Changes from v1:
 - Added Reviewed-by signatures
 - Added namespace features flag (Patch 01/15)
 - Remove nvme_ns_has_pi function (Patch 01/15)
 - Added has_pi field to struct nvme_request (Patch 01/15)
 - Subject change for patch 02/15
 - Fix comment for PCI metadata (Patch 03/15)
 - Rebase over "nvme: Avoid preallocating big SGL for data" patchset
 - Introduce NVME_INLINE_PROT_SG_CNT flag (Patch 05/15)
 - Introduce nvme_rdma_sgl structure (Patch 06/15)
 - Remove first_sgl pointer from struct nvme_rdma_request (Patch 06/15)
 - Split nvme-rdma patches (Patches 06/15, 07/15)
 - Rename is_protected to use_pi (Patch 07/15)
 - Refactor nvme_rdma_get_max_fr_pages function (Patch 07/15)
 - Added ifdef CONFIG_BLK_DEV_INTEGRITY (Patches 07/15, 09/15, 13/15,
   14/15, 15/15)
 - Added port configfs pi_enable (Patch 14/15)

Israel Rukshin (13):
  nvme: Introduce namespace features flag
  nvme: Add has_pi field to the nvme_req structure
  nvme-fabrics: Allow user enabling metadata/T10-PI support
  nvme: Introduce NVME_INLINE_PROT_SG_CNT
  nvme-rdma: Introduce nvme_rdma_sgl structure
  nvmet: Prepare metadata request
  nvmet: Add metadata characteristics for a namespace
  nvmet: Rename nvmet_rw_len to nvmet_rw_data_len
  nvmet: Rename nvmet_check_data_len to nvmet_check_transfer_len
  nvme: Add Metadata Capabilities enumerations
  nvmet: Add metadata/T10-PI support
  nvmet: Add metadata support for block devices
  nvmet-rdma: Add metadata/T10-PI support

Max Gurtovoy (6):
  nvme: Enforce extended LBA format for fabrics metadata
  nvme: Introduce max_integrity_segments ctrl attribute
  nvme-rdma: Add metadata/T10-PI support
  nvmet: Add mdts setting op for controllers
  RDMA/rw: Expose maximal page list for a device per 1 MR
  nvmet-rdma: Implement set_mdts controller op

 drivers/infiniband/core/rw.c      |  14 +-
 drivers/nvme/host/core.c          |  76 +++++---
 drivers/nvme/host/fabrics.c       |  11 ++
 drivers/nvme/host/fabrics.h       |   3 +
 drivers/nvme/host/nvme.h          |   9 +-
 drivers/nvme/host/pci.c           |   7 +
 drivers/nvme/host/rdma.c          | 367 +++++++++++++++++++++++++++++++++-----
 drivers/nvme/target/admin-cmd.c   |  41 +++--
 drivers/nvme/target/configfs.c    |  61 +++++++
 drivers/nvme/target/core.c        |  54 ++++--
 drivers/nvme/target/discovery.c   |   8 +-
 drivers/nvme/target/fabrics-cmd.c |  19 +-
 drivers/nvme/target/io-cmd-bdev.c | 113 +++++++++++-
 drivers/nvme/target/io-cmd-file.c |   6 +-
 drivers/nvme/target/nvmet.h       |  39 +++-
 drivers/nvme/target/rdma.c        | 252 ++++++++++++++++++++++++--
 include/linux/nvme.h              |   2 +
 include/rdma/rw.h                 |   1 +
 18 files changed, 955 insertions(+), 128 deletions(-)

-- 
1.8.3.1