5 files changed, 115 insertions, 0 deletions
diff --git a/modules.d/90dm/11-dm.rules b/modules.d/90dm/11-dm.rules
new file mode 100644
index 0000000..89941c4
--- /dev/null
+++ b/modules.d/90dm/11-dm.rules
@@ -0,0 +1,5 @@
+SUBSYSTEM!="block", GOTO="dm_end"
+KERNEL!="dm-[0-9]*", GOTO="dm_end"
+ACTION!="add|change", GOTO="dm_end"
+OPTIONS+="db_persist"
+LABEL="dm_end"
diff --git a/modules.d/90dm/59-persistent-storage-dm.rules b/modules.d/90dm/59-persistent-storage-dm.rules
new file mode 100644
index 0000000..3e0b8f6
--- /dev/null
+++ b/modules.d/90dm/59-persistent-storage-dm.rules
@@ -0,0 +1,15 @@
+SUBSYSTEM!="block", GOTO="dm_end"
+ACTION!="add|change", GOTO="dm_end"
+# Also don't process disks that are slated to be a multipath device
+ENV{DM_MULTIPATH_DEVICE_PATH}=="1", GOTO="dm_end"
+
+KERNEL!="dm-[0-9]*", GOTO="dm_end"
+ACTION=="add", GOTO="dm_end"
+IMPORT{program}="/sbin/dmsetup info -c --nameprefixes --unquoted --rows --noheadings -o name,uuid,suspended,readonly,major,minor,open,tables_loaded,names_using_dev -j%M -m%m"
+ENV{DM_NAME}!="?*", GOTO="dm_end"
+ENV{DM_UDEV_DISABLE_OTHER_RULES_FLAG}=="1", GOTO="dm_end"
+ENV{DM_UUID}=="CRYPT-TEMP-?*", GOTO="dm_end"
+ENV{DM_UUID}!="?*", ENV{DM_NAME}=="temporary-cryptsetup-?*", GOTO="dm_end"
+IMPORT{builtin}="blkid"
+
+LABEL="dm_end"
diff --git a/modules.d/90dm/dm-pre-udev.sh b/modules.d/90dm/dm-pre-udev.sh
new file mode 100755
index 0000000..ba8d962
--- /dev/null
+++ b/modules.d/90dm/dm-pre-udev.sh
@@ -0,0 +1,4 @@
+#!/bin/sh
+
+strstr "$(cat /proc/misc)" device-mapper || modprobe dm_mod
+modprobe dm_mirror 2> /dev/null
diff --git a/modules.d/90dm/dm-shutdown.sh b/modules.d/90dm/dm-shutdown.sh
new file mode 100755
index 0000000..bd7134a
--- /dev/null
+++ b/modules.d/90dm/dm-shutdown.sh
@@ -0,0 +1,53 @@
+#!/bin/sh
+
+_remove_dm() {
+    local dev="$1"
+    local s
+    local devname
+
+    for s in /sys/block/"${dev}"/holders/dm-*; do
+        [ -e "${s}" ] || continue
+        _remove_dm "${s##*/}"
+    done
+    # multipath devices might have MD devices on top,
+    # which are removed after this script. So do not
+    # remove those to avoid spurious errors
+    case $(cat /sys/block/"${dev}"/dm/uuid) in
+        mpath-*)
+            return 0
+            ;;
+        *)
+            read -r devname < /sys/block/"${dev}"/dm/name
+            dmsetup -v --noudevsync remove "$devname" || return $?
+            ;;
+    esac
+    return 0
+}
+
+_do_dm_shutdown() {
+    local ret=0
+    local final="$1"
+    local dev
+
+    info "Disassembling device-mapper devices"
+    for dev in /sys/block/dm-*; do
+        [ -e "${dev}" ] || continue
+        if [ "x$final" != "x" ]; then
+            _remove_dm "${dev##*/}" || ret=$?
+        else
+            _remove_dm "${dev##*/}" > /dev/null 2>&1 || ret=$?
+        fi
+    done
+    if [ "x$final" != "x" ]; then
+        info "dmsetup ls --tree"
+        dmsetup ls --tree 2>&1 | vinfo
+    fi
+    return $ret
+}
+
+if command -v dmsetup > /dev/null \
+    && [ "x$(dmsetup status)" != "xNo devices found" ]; then
+    _do_dm_shutdown "$1"
+else
+    :
+fi
diff --git a/modules.d/90dm/module-setup.sh b/modules.d/90dm/module-setup.sh
new file mode 100755
index 0000000..0c4cba3
--- /dev/null
+++ b/modules.d/90dm/module-setup.sh
@@ -0,0 +1,38 @@
+#!/bin/bash
+
+# called by dracut
+check() {
+    require_binaries dmsetup || return 1
+    return 255
+}
+
+# called by dracut
+depends() {
+    return 0
+}
+
+# called by dracut
+installkernel() {
+    instmods '=drivers/md' dm_mod dm-cache dm-cache-mq dm-cache-cleaner
+}
+
+# called by dracut
+install() {
+    modinfo -k "$kernel" dm_mod > /dev/null 2>&1 \
+        && inst_hook pre-udev 30 "$moddir/dm-pre-udev.sh"
+
+    inst_multiple dmsetup
+
+    inst_rules 10-dm.rules 13-dm-disk.rules 95-dm-notify.rules
+    # Gentoo ebuild for LVM2 prior to 2.02.63-r1 doesn't install above rules
+    # files, but provides the one below:
+    inst_rules 64-device-mapper.rules
+    # debian udev rules
+    inst_rules 60-persistent-storage-dm.rules 55-dm.rules
+
+    inst_rules "$moddir/11-dm.rules"
+
+    inst_rules "$moddir/59-persistent-storage-dm.rules"
+
+    inst_hook shutdown 25 "$moddir/dm-shutdown.sh"
+}