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Linux kernel module driver that provides TCP transport for NVMe over fabrics.

License: GNU General Public License v2.0

Makefile 0.31% C 99.69%
nvmeoverfabrics nvme-storage nvmeoftcp nvme-target iscsi-target mayascale cloud-storage

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chang-steve yilun0206

nvme-of-tcp's Issues

Initiator discovers target (SPDK) failed

Issue info

  1. We use the nvme of tcp driver for Cantos(kernle 3.1.0-x).
  2. SPDK as targets couldn't be found by command ("nvme discover").

Analyze

Please refer to nvme tcp spec.
2

Control supports "disabling submission queue head pointer updates", so SPDK target only sends C2H PDU and doesn't sends CQE.
Host should send CQE by itself.

Solution

By referring nvme of tcp for kernel 5.4, fix host/tcp.c:
1

Port NVMeoF-TCP driver for Centos 7.6 (kernel-3.10.0-957)

Provide host driver with NVMeoF TCP transport for Centos/RHEL 7.6 release. We need to match this driver with the fabrics driver module of newer 7.6 (kernel-3.10.0-957)

  1. Use the macro RHEL_RELEASE_CODE to identify particular release version and make changes accordingly in the source code
  2. Get the matching fabrics.h nvme.h for kernel-3.10.0-957 and keep them in rhel-release-7.6

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