From fc0cc6f159857e463aacababdc0735b0972d103c Mon Sep 17 00:00:00 2001
From: Sergio Correia <scorreia@redhat.com>
Date: Wed, 13 May 2020 23:51:04 -0300
Subject: [PATCH 4/8] Add rd.neednet=1 to cmdline only if there are devices
 bound to tang

---
 .../dracut/clevis-pin-tang/module-setup.sh.in | 21 +++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/src/luks/systemd/dracut/clevis-pin-tang/module-setup.sh.in b/src/luks/systemd/dracut/clevis-pin-tang/module-setup.sh.in
index 1bb2ead..a4984dc 100755
--- a/src/luks/systemd/dracut/clevis-pin-tang/module-setup.sh.in
+++ b/src/luks/systemd/dracut/clevis-pin-tang/module-setup.sh.in
@@ -18,8 +18,23 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #
 
+has_devices_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 clevis network
+    local deps="clevis"
+    if has_devices_bound_to_tang; then
+         deps=$(printf "%s network" "${deps}")
+    fi
+    echo "${deps}"
     return 0
 }
 
@@ -28,7 +43,9 @@ cmdline() {
 }
 
 install() {
-    cmdline > "${initdir}/etc/cmdline.d/99clevis-pin-tang.conf"
+    if has_devices_bound_to_tang; then
+        cmdline > "${initdir}/etc/cmdline.d/99clevis-pin-tang.conf"
+    fi
 
     inst_multiple \
 	clevis-decrypt-tang \
-- 
2.18.4