Retrieve generic information about NVMe disks

Add nvme-cli to Recommends and try to gather generic NVMe information
from disks

NOTE: we identify the NVMe disks using lsblk, because this doesn't
require any special tools or alike then. We could use something like:

  nvme list --output-format=json | jq -r '.Devices[].DevicePath'

But then we'd need to have jq available. Also, if there is no
NVMe subsystem available (like often in VMs), then we'd get:

  {
    "error":"Failed to scan topology: No such file or directory"
  }

... in its *stdout* and would need to deal with that then.

Closes: #5

debian/control

@@ -36,6 +36,7 @@ Recommends:
  mokutil,
  net-tools,
  numactl,
+ nvme-cli,
  open-iscsi,
  parted,
  powermgmt-base,

grml-hwinfo

@@ -172,6 +172,51 @@ get_network_devices() {
   done
 }
 
+nvme_info() {
+  if ! exectest nvme ; then
+    return 0
+  fi
+
+  # `nvme list` returns with `Failed to scan topology` and exit code 1,
+  # if there's no NVMe device present. There's no point in running any
+  # further commands then, so let's avoid collecting empty files and
+  # error messages
+  if ! nvme list &>/dev/null ; then
+    return 0
+  fi
+
+  # list
+  nvme list > ./nvme_list 2>./nvme_list.error
+  nvme list --output-format=json > ./json/nvme_list
+
+  # list-subsys
+  nvme list-subsys > ./nvme_list-subsys 2>./nvme_list-subsys.error
+  nvme list-subsys --output-format=json > ./json/nvme_list-subsys
+
+  # get list of available disks
+  mapfile -t nvme_disks < <(lsblk -nd -o NAME -e 7,11 | sed -n 's/^nvme/\/dev\/&/p')
+
+  for disk in "${nvme_disks[@]}" ; do
+    disk_name="${disk##*/}" # /dev/nvme0n1 -> nvme0n1
+
+    # smart-log
+    nvme smart-log "$disk" > ./nvme_smart-log_"${disk_name}"
+    nvme smart-log --output-format=json "$disk" > ./json/nvme_smart-log_"${disk_name}"
+
+    # fw-log
+    nvme fw-log "$disk" > ./nvme_fw-log_"${disk_name}"
+    nvme fw-log --output-format=json "$disk" > ./json/./nvme_fw-log_"${disk_name}"
+
+    # error-log
+    nvme error-log "$disk" > ./nvme_error-log_"${disk_name}"
+    nvme error-log --output-format=json "$disk" > ./json/./nvme_error-log_"${disk_name}"
+
+    # effects-log
+    nvme effects-log "$disk" > ./nvme_effects-log_"${disk_name}"
+    nvme effects-log --output-format=json "$disk" > ./json/./nvme_effects-log_"${disk_name}"
+  done
+}
+
 # Check if X server is running
 #
 # If xset is missing, we rely on the existence of the $DISPLAY variable.
@@ -459,6 +504,9 @@ cd "${OUTDIR}" || exit 1
       lsscsi -t > ./lsscsi_transport 2>./lsscsi_transport.error
     fi
 
+    # NVMe
+    nvme_info
+
     for disk in $disklist; do
       if exectest sfdisk && [[ -b "/dev/${disk}" ]] ; then
         sfdisk -d "/dev/${disk}" > "./sfdisk_${disk}" 2>"./sfdisk_${disk}.error"