1 files changed, 60 insertions, 0 deletions
diff --git a/modules.d/90btrfs/module-setup.sh b/modules.d/90btrfs/module-setup.sh
new file mode 100755
index 0000000..5d88133
--- /dev/null
+++ b/modules.d/90btrfs/module-setup.sh
@@ -0,0 +1,60 @@
+#!/bin/bash
+
+# called by dracut
+check() {
+    # if we don't have btrfs installed on the host system,
+    # no point in trying to support it in the initramfs.
+    require_binaries btrfs || return 1
+
+    [[ $hostonly ]] || [[ $mount_needs ]] && {
+        for fs in "${host_fs_types[@]}"; do
+            [[ $fs == "btrfs" ]] && return 0
+        done
+        return 255
+    }
+
+    return 0
+}
+
+# called by dracut
+depends() {
+    echo udev-rules
+    return 0
+}
+
+# called by dracut
+cmdline() {
+    # Hack for slow machines
+    # see https://github.com/dracutdevs/dracut/issues/658
+    printf " rd.driver.pre=btrfs"
+}
+
+# called by dracut
+installkernel() {
+    instmods btrfs
+    printf "%s\n" "$(cmdline)" > "${initdir}/etc/cmdline.d/00-btrfs.conf"
+}
+
+# called by dracut
+install() {
+    if ! inst_rules 64-btrfs.rules; then
+        inst_rules "$moddir/80-btrfs.rules"
+        case "$(btrfs --help)" in
+            *device\ ready*)
+                inst_script "$moddir/btrfs_device_ready.sh" /sbin/btrfs_finished
+                ;;
+            *)
+                inst_script "$moddir/btrfs_finished.sh" /sbin/btrfs_finished
+                ;;
+        esac
+    else
+        inst_rules 64-btrfs-dm.rules
+    fi
+
+    if ! dracut_module_included "systemd"; then
+        inst_hook initqueue/timeout 10 "$moddir/btrfs_timeout.sh"
+    fi
+
+    inst_multiple -o btrfsck btrfs-zero-log
+    inst "$(command -v btrfs)" /sbin/btrfs
+}