1 files changed, 64 insertions, 0 deletions
diff --git a/modules.d/95nbd/parse-nbdroot.sh b/modules.d/95nbd/parse-nbdroot.sh
new file mode 100755
index 0000000..1c3f0a0
--- /dev/null
+++ b/modules.d/95nbd/parse-nbdroot.sh
@@ -0,0 +1,64 @@
+#!/bin/sh
+#
+# Preferred format:
+#       root=nbd:srv:port/exportname[:fstype[:rootflags[:nbdopts]]]
+#       [root=*] netroot=nbd:srv:port/exportname[:fstype[:rootflags[:nbdopts]]]
+#
+# nbdopts is a comma separated list of options to give to nbd-client
+#
+# root= takes precedence over netroot= if root=nbd[...]
+#
+
+# This script is sourced, so root should be set. But let's be paranoid
+[ -z "$root" ] && root=$(getarg root=)
+
+if [ -z "$netroot" ]; then
+    for netroot in $(getargs netroot=); do
+        [ "${netroot%%:*}" = "nbd" ] && break
+    done
+    [ "${netroot%%:*}" = "nbd" ] || unset netroot
+fi
+
+# Root takes precedence over netroot
+if [ "${root%%:*}" = "nbd" ]; then
+    if [ -n "$netroot" ]; then
+        warn "root takes precedence over netroot. Ignoring netroot"
+
+    fi
+    netroot=$root
+    unset root
+fi
+
+# If it's not nbd we don't continue
+[ "${netroot%%:*}" = "nbd" ] || return
+
+# Check required arguments
+nroot=${netroot#nbd:}
+server=${nroot%%:*}
+if [ "${server%"${server#?}"}" = "[" ]; then
+    server=${nroot#[}
+    server=${server%%]:*}\]
+    nroot=${nroot#*]:}
+else
+    nroot=${nroot#*:}
+fi
+port=${nroot%%:*}
+unset nroot
+
+[ -z "$server" ] && die "Argument server for nbdroot is missing"
+[ -z "$port" ] && die "Argument port for nbdroot is missing"
+
+# NBD actually supported?
+incol2 /proc/devices nbd || modprobe nbd || die "nbdroot requested but kernel/initrd does not support nbd"
+
+# Done, all good!
+# shellcheck disable=SC2034
+rootok=1
+
+# Shut up init error check
+if [ -z "$root" ]; then
+    root=block:/dev/root
+    # the device is created and waited for in ./nbdroot.sh
+fi
+
+echo 'nbd-client -check /dev/nbd0 > /dev/null 2>&1' > "$hookdir"/initqueue/finished/nbdroot.sh