NAS-135917 / 25.10 / SPDK backend for NVMe-oF #16562
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Add middleware plumbing for SPDK NVMe-oF backend.
Depending on the
kernelsetting innvmet.global.configthe configuration will either be applied to the kernel NVMe-oF target, or to a SPDK based target. This PR adds support for the latter.Overview
If the kernel implementation is not selected, then a user-space daemon is launched. The
ix-nvmfservice is a thin wrapper around the/opt/spdk/usr/bin/nvmf_tgtexecutable that calls into middleware to perform some necessary setup/teardown. Before the executable is launched, some DPDK setup is performed, and after it has been launched the configuration is "applied" to it.A python library is delivered as part of SPDK, and is called directly from middleware to configure the daemon. So, it will "create" ports, subsystems, namespaces, bdevs, etc within the daemon.
Missing
The following items have not been fully addressed in this PR, and will follow.
vfio-pciinstead.