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From 25009adea66d3bf9b73f128273de28e532b03281 Mon Sep 17 00:00:00 2001
From: Sergio Correia <scorreia@redhat.com>
Date: Sat, 30 Nov 2019 18:23:09 -0500
Subject: [PATCH] Add rd.neednet=1 to cmdline only if there are devices bound
 to tang

---
 src/luks/systemd/dracut/module-setup.sh.in | 24 ++++++++++++++++++----
 1 file changed, 20 insertions(+), 4 deletions(-)

diff --git a/src/luks/systemd/dracut/module-setup.sh.in b/src/luks/systemd/dracut/module-setup.sh.in
index 990bf4a..841f7a8 100755
--- a/src/luks/systemd/dracut/module-setup.sh.in
+++ b/src/luks/systemd/dracut/module-setup.sh.in
@@ -18,19 +18,35 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #
 
+is_bound_to_tang() {
+    local dev
+    for dev in $(lsblk -p -n -s -r \
+                 | awk '$6 == "crypt" { getline; print $1 }' | sort -u); do
+       if clevis luks list -d "${dev}" 2>/dev/null | grep -q tang; then
+           return 0
+       fi
+    done
+    return 1
+}
+
 depends() {
-    echo crypt systemd network
-    return 0
+    local depends="crypt systemd"
+    if is_bound_to_tang; then
+        depends=$(printf "%s network" "${depends}")
+    fi
+    echo "${depends}"
 }
 
-cmdline() {
+tang_cmdline() {
     echo "rd.neednet=1"
 }
 
 install() {
     local ret=0
 
-    cmdline > "${initdir}/etc/cmdline.d/99clevis.conf"
+    if is_bound_to_tang; then
+        tang_cmdline > "${initdir}/etc/cmdline.d/99clevis.conf"
+    fi
 
     inst_hook initqueue/online 60 "$moddir/clevis-hook.sh"
     inst_hook initqueue/settled 60 "$moddir/clevis-hook.sh"
-- 
2.18.1