Set up a laptop as NVMe-over-fabric target in initramfs

nvme-target-client.sh

#!/bin/sh
# This imports the nvme device exported by the nvme-target-mode.sh script

set -e

sudo modprobe nvme-fabrics

sudo ifconfig thunderbolt0 10.99.1.1 netmask 255.255.255.0 up

sudo nvme connect -t tcp -a 10.99.1.2 -n mylaptopname -s 4420

nvme-target-mode.sh

#!/bin/sh

# This script configures the Thunderbolt interface with a static IP and exports nvme0 over TCP to all comers.

# Your kernel config needs:
#   CONFIG_NVME_FABRICS
#   CONFIG_NVME_TARGET
#   CONFIG_NVME_TARGET_TCP
# The client additionally needs CONFIG_NVME_TCP

set -e

IP=10.99.1.2

# my initrd has already imported my ZFS pool before this point, YMMV
zpool export mypool

ip addr add $IP/24 dev thunderbolt0
ifconfig thunderbolt0 up

mount -t configfs none /sys/kernel/config
cd /sys/kernel/config/nvmet

SUB=subsystems/mylaptopname

mkdir $SUB
echo 1 > $SUB/attr_allow_any_host

NS=$SUB/namespaces/1

mkdir $NS
echo /dev/nvme0n1 > $NS/device_path
echo 1 > $NS/enable

PORT=ports/1
mkdir $PORT
echo $IP > $PORT/addr_traddr
echo tcp > $PORT/addr_trtype
echo 4420 > $PORT/addr_trsvcid
echo ipv4 > $PORT/addr_adrfam

ln -s $SUB $PORT/subsystems/

echo NVMe target ready