From: Brian King <brking@linux.vnet.ibm.com>
Date: Fri, 26 Feb 2021 20:24:07 +0000 (-0600)
Subject: nvme: Make gen-hostnqn use partition UUID on IBM POWER systems
X-Git-Tag: v1.14~67
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=bb20789a34c93b7a871ab35efd6a4c8ae6ebb76b;p=users%2Fsagi%2Fnvme-cli.git

nvme: Make gen-hostnqn use partition UUID on IBM POWER systems

IBM POWER systems expose a platform created UUID in the device
tree. Use that as the UUID in the host NQN.

Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
---

diff --git a/scripts/gen-hostnqn.sh b/scripts/gen-hostnqn.sh
index d8783cfc..5138f0c0 100644
--- a/scripts/gen-hostnqn.sh
+++ b/scripts/gen-hostnqn.sh
@@ -2,7 +2,11 @@
 
 LC_ALL=C
 
-UUID=$(dmidecode -s system-uuid | tr -d '[:space:]')
+if [ -e "/proc/device-tree/ibm,partition-uuid" ] ; then
+	UUID=$(tr -d '\0' < /proc/device-tree/ibm,partition-uuid)
+else
+	UUID=$(dmidecode -s system-uuid | tr -d '[:space:]')
+fi
 
 if [ -z "$UUID" ] ; then
 	>&2 echo "No UUID found, can't determine hostnqn."