build_library: Fix depmod issues with sysext kmods

build_library/sysext_mangle_flatcar-nvidia-drivers-535

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+set -euo pipefail
+
+SCRIPT_NAME=$(basename "$(realpath "${BASH_SOURCE[0]}")")
+SYSEXT_NAME=${SCRIPT_NAME#sysext_mangle_}
+SYSEXT_NAME=${SYSEXT_NAME%.sh}
+DIR=$(dirname "$(realpath "${BASH_SOURCE[0]}")")
+. "$DIR/sysext_mangle_kmod"
+
+rootfs="${1}"
+
+cd "${rootfs}"
+configure_modprobe "$SYSEXT_NAME"

build_library/sysext_mangle_flatcar-nvidia-drivers-535-open

@@ -0,0 +1 @@
+sysext_mangle_flatcar-nvidia-drivers-535

build_library/sysext_mangle_flatcar-nvidia-drivers-550

@@ -0,0 +1 @@
+sysext_mangle_flatcar-nvidia-drivers-535

build_library/sysext_mangle_flatcar-nvidia-drivers-550-open

@@ -0,0 +1 @@
+sysext_mangle_flatcar-nvidia-drivers-535

build_library/sysext_mangle_flatcar-nvidia-drivers-570

@@ -0,0 +1 @@
+sysext_mangle_flatcar-nvidia-drivers-535

build_library/sysext_mangle_flatcar-nvidia-drivers-570-open

@@ -0,0 +1 @@
+sysext_mangle_flatcar-nvidia-drivers-535

build_library/sysext_mangle_flatcar-zfs

@@ -3,6 +3,9 @@
 set -euo pipefail
 rootfs="${1}"
 
+DIR="$(dirname "$(realpath "${BASH_SOURCE[0]}")")"
+. "$DIR/sysext_mangle_kmod"
+
 pushd "${rootfs}"
 
 rm -rf ./usr/{lib/debug/,lib64/cmake/,include/}
@@ -40,4 +43,5 @@ cat <<EOF >./usr/lib/systemd/system/systemd-udevd.service.d/10-zfs.conf
 [Unit]
 After=systemd-sysext.service
 EOF
+configure_modprobe flatcar-zfs
 popd

build_library/sysext_mangle_kmod

@@ -0,0 +1,48 @@
+#!/bin/bash
+
+configure_modprobe() {
+  local sysext_name="${1}"
+  shift
+
+  local module_directories=(./usr/lib/modules/*-flatcar/)
+
+  mkdir -p ./usr/lib/modprobe.d/
+  for module_name in $(find "${module_directories[@]}" -type f \( -name "*.ko" -o -name "*.ko.*" \) -printf "%f\n" | sed -E 's/\.ko(\.\w+)?$//'); do
+    cat <<EOF >> "./usr/lib/modprobe.d/10-${sysext_name}-kmod-sysext.conf"
+install $module_name     /usr/local/bin/_${sysext_name}_modprobe_helper $module_name
+remove  $module_name     /usr/local/bin/_${sysext_name}_modprobe_helper -r $module_name
+EOF
+  done
+
+  mkdir -p ./usr/local/bin/
+  install -m0755 -D /dev/stdin "./usr/local/bin/_${sysext_name}_modprobe_helper" <<'EOF'
+#!/bin/bash
+
+set -euo pipefail
+
+action="Loading"
+for arg in "$@"; do
+    if [[ $arg == "-r" ]]; then
+        action="Unloading"
+    fi
+done
+echo "$action kernel module from a sysext..."
+
+KMOD_PATH=/usr/lib/modules/$(uname -r)
+TMP_DIR=$(mktemp -d)
+trap "rm -rf -- '${TMP_DIR}'" EXIT
+mkdir "${TMP_DIR}"/{upper,work}
+
+unshare -m bash -s -- "${@}" <<FOE
+set -euo pipefail
+if ! mountpoint -q "${KMOD_PATH}"; then
+    mount -t overlay overlay -o lowerdir="${KMOD_PATH}",upperdir="${TMP_DIR}"/upper,workdir="${TMP_DIR}"/work "${KMOD_PATH}"
+    depmod
+fi
+modprobe --ignore-install "\${@}"
+FOE
+EOF
+
+  # prevent the sysext from masking /usr/lib/modules/*-flatcar/modules.XXX
+  find "${module_directories[@]}" -maxdepth 1 -mindepth 1 -type f -delete
+}