1 files changed, 74 insertions, 0 deletions
diff --git a/modules.d/95virtfs/mount-virtfs.sh b/modules.d/95virtfs/mount-virtfs.sh
new file mode 100755
index 0000000..e52c752
--- /dev/null
+++ b/modules.d/95virtfs/mount-virtfs.sh
@@ -0,0 +1,74 @@
+#!/bin/sh
+
+type getarg > /dev/null 2>&1 || . /lib/dracut-lib.sh
+
+filter_rootopts() {
+    rootopts=$1
+    # strip ro and rw options
+    local OLDIFS="$IFS"
+    IFS=,
+    # shellcheck disable=SC2086
+    set -- $rootopts
+    IFS="$OLDIFS"
+    local v
+    while [ $# -gt 0 ]; do
+        case $1 in
+            rw | ro) ;;
+            defaults) ;;
+            *)
+                v="$v,${1}"
+                ;;
+        esac
+        shift
+    done
+    rootopts=${v#,}
+    echo "$rootopts"
+}
+
+mount_root() {
+    rootfs="9p"
+    rflags="trans=virtio,version=9p2000.L"
+
+    modprobe 9pnet_virtio
+
+    mount -t ${rootfs} -o "$rflags",ro "${root#virtfs:}" "$NEWROOT"
+
+    rootopts=
+    if getargbool 1 rd.fstab -n rd_NO_FSTAB \
+        && ! getarg rootflags \
+        && [ -f "$NEWROOT/etc/fstab" ] \
+        && ! [ -L "$NEWROOT/etc/fstab" ]; then
+        # if $NEWROOT/etc/fstab contains special mount options for
+        # the root filesystem,
+        # remount it with the proper options
+        rootopts="defaults"
+        while read -r dev mp _ opts rest || [ -n "$dev" ]; do
+            # skip comments
+            [ "${dev%%#*}" != "$dev" ] && continue
+
+            if [ "$mp" = "/" ]; then
+                rootopts=$opts
+                break
+            fi
+        done < "$NEWROOT/etc/fstab"
+
+        rootopts=$(filter_rootopts "$rootopts")
+    fi
+
+    # we want rootflags (rflags) to take precedence so prepend rootopts to
+    # them; rflags is guaranteed to not be empty
+    rflags="${rootopts:+${rootopts},}${rflags}"
+
+    umount "$NEWROOT"
+
+    info "Remounting ${root#virtfs:} with -o ${rflags}"
+    mount -t ${rootfs} -o "$rflags" "${root#virtfs:}" "$NEWROOT" 2>&1 | vinfo
+
+    [ -f "$NEWROOT"/forcefsck ] && rm -f -- "$NEWROOT"/forcefsck 2> /dev/null
+    [ -f "$NEWROOT"/.autofsck ] && rm -f -- "$NEWROOT"/.autofsck 2> /dev/null
+}
+
+if [ -n "$root" -a -z "${root%%virtfs:*}" ]; then
+    mount_root
+fi
+: