2 files changed, 130 insertions, 0 deletions
diff --git a/modules.d/98usrmount/module-setup.sh b/modules.d/98usrmount/module-setup.sh
new file mode 100755
index 0000000..bc88deb
--- /dev/null
+++ b/modules.d/98usrmount/module-setup.sh
@@ -0,0 +1,20 @@
+#!/bin/bash
+
+# called by dracut
+check() {
+    [[ $mount_needs ]] && return 1
+    return 0
+}
+
+# called by dracut
+depends() {
+    echo 'fs-lib'
+}
+
+# called by dracut
+install() {
+    if ! dracut_module_included "systemd"; then
+        inst_hook pre-pivot 50 "$moddir/mount-usr.sh"
+    fi
+    :
+}
diff --git a/modules.d/98usrmount/mount-usr.sh b/modules.d/98usrmount/mount-usr.sh
new file mode 100755
index 0000000..0a3eb32
--- /dev/null
+++ b/modules.d/98usrmount/mount-usr.sh
@@ -0,0 +1,110 @@
+#!/bin/sh
+
+type info > /dev/null 2>&1 || . /lib/dracut-lib.sh
+type fsck_single > /dev/null 2>&1 || . /lib/fs-lib.sh
+
+filtersubvol() {
+    local _oldifs
+    _oldifs="$IFS"
+    local IFS=","
+    # shellcheck disable=SC2086
+    set -- $1
+    IFS="$_oldifs"
+    while [ $# -gt 0 ]; do
+        case $1 in
+            'subvol='*) : ;;
+            *) printf '%s' "${1}," ;;
+        esac
+        shift
+    done
+}
+
+fsck_usr() {
+    local _dev="$1"
+    local _fs="$2"
+    local _fsopts="$3"
+    local _fsckoptions
+
+    if [ -f "$NEWROOT"/fsckoptions ]; then
+        read -r _fsckoptions < "$NEWROOT"/fsckoptions
+    fi
+
+    if [ -f "$NEWROOT"/forcefsck ] || getargbool 0 forcefsck; then
+        _fsckoptions="-f $_fsckoptions"
+    elif [ -f "$NEWROOT"/.autofsck ]; then
+        # shellcheck disable=SC1090
+        [ -f "$NEWROOT"/etc/sysconfig/autofsck ] && . "$NEWROOT"/etc/sysconfig/autofsck
+        if [ "$AUTOFSCK_DEF_CHECK" = "yes" ]; then
+            AUTOFSCK_OPT="$AUTOFSCK_OPT -f"
+        fi
+        if [ -n "$AUTOFSCK_SINGLEUSER" ]; then
+            warn "*** Warning -- the system did not shut down cleanly. "
+            warn "*** Dropping you to a shell; the system will continue"
+            warn "*** when you leave the shell."
+            emergency_shell
+        fi
+        _fsckoptions="$AUTOFSCK_OPT $_fsckoptions"
+    fi
+
+    fsck_single "$_dev" "$_fs" "$_fsopts" "$_fsckoptions"
+}
+
+mount_usr() {
+    local _dev _mp _fs _opts _ _usr_found _ _freq _passno
+    # check, if we have to mount the /usr filesystem
+    while read -r _dev _mp _fs _opts _freq _passno || [ -n "$_dev" ]; do
+        [ "${_dev%%#*}" != "$_dev" ] && continue
+        if [ "$_mp" = "/usr" ]; then
+            case "$_dev" in
+                LABEL=* | UUID=* | PARTUUID=* | PARTLABEL=*)
+                    _dev="$(label_uuid_to_dev "$_dev")"
+                    ;;
+                *) ;;
+            esac
+
+            if strstr "$_opts" "subvol=" \
+                && [ "${root#block:}" -ef "$_dev" ] \
+                && [ -n "$rflags" ]; then
+                # for btrfs subvolumes we have to mount /usr with the same rflags
+                rflags=$(filtersubvol "$rflags")
+                rflags=${rflags%%,}
+                _opts="${_opts:+${_opts},}${rflags}"
+            elif getargbool 0 ro; then
+                # if "ro" is specified, we want /usr to be mounted read-only
+                _opts="${_opts:+${_opts},}ro"
+            elif getargbool 0 rw; then
+                # if "rw" is specified, we want /usr to be mounted read-write
+                _opts="${_opts:+${_opts},}rw"
+            fi
+            echo "$_dev ${NEWROOT}${_mp} $_fs ${_opts} $_freq $_passno"
+            _usr_found="1"
+            break
+        fi
+    done < "$NEWROOT/etc/fstab" >> /etc/fstab
+
+    if [ "$_usr_found" != "" ]; then
+        # we have to mount /usr
+        _fsck_ret=0
+        if ! getargbool 0 rd.skipfsck; then
+            if [ "0" != "${_passno:-0}" ]; then
+                fsck_usr "$_dev" "$_fs" "$_opts"
+                _fsck_ret=$?
+                [ $_fsck_ret -ne 255 ] && echo $_fsck_ret > /run/initramfs/usr-fsck
+            fi
+        fi
+
+        info "Mounting /usr with -o $_opts"
+        mount "$NEWROOT/usr" 2>&1 | vinfo
+
+        if ! ismounted "$NEWROOT/usr"; then
+            warn "Mounting /usr to $NEWROOT/usr failed"
+            warn "*** Dropping you to a shell; the system will continue"
+            warn "*** when you leave the shell."
+            emergency_shell
+        fi
+    fi
+}
+
+if [ -f "$NEWROOT/etc/fstab" ]; then
+    mount_usr
+fi