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nvmf: The in-kernel NVMe over Fabrics host

Description

nvmf: The in-kernel NVMe over Fabrics host

This is the client (initiator in SCSI terms) for NVMe over Fabrics.
Userland is responsible for creating a set of queue pairs and then
handing them off via an ioctl to this driver, e.g. via the 'connect'
command from nvmecontrol(8). An nvmeX new-bus device is created
at the top-level to represent the remote controller similar to PCI
nvmeX devices for PCI-express controllers.

As with nvme(4), namespace devices named /dev/nvmeXnsY are created and
pass through commands can be submitted to either the namespace devices
or the controller device. For example, 'nvmecontrol identify nvmeX'
works for a remote Fabrics controller the same as for a PCI-express
controller.

nvmf exports remote namespaces via nda(4) devices using the new NVMF
CAM transport. nvmf does not support nvd(4), only nda(4).

Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D44714

Details

Provenance
jhbAuthored on May 2 2024, 11:29 PM
Differential Revision
D44714: nvmf: The in-kernel NVMe over Fabrics host
Parents
rG07c6a62bab69: cam: Add a XPORT_NVMF for NVMe over Fabrics sims
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