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systemd/0988-test-backport-TEST-81-GENERATORS-fstab-generator-onl.patch
Jan Macku 2294de3d20 systemd-239-79 
Resolves: RHEL-1087,RHEL-6213
2024-01-08 10:25:04 +01:00

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From 52026032996f021963f5af8d625a5b9653d3f815 Mon Sep 17 00:00:00 2001
From: Frantisek Sumsal <fsumsal@redhat.com>
Date: Mon, 27 Nov 2023 14:54:15 +0100
Subject: [PATCH] test: backport TEST-81-GENERATORS (fstab-generator only)
Some fstab-generator features are not present on RHEL 8 or they behave
differently - in such case there's an inline comment explaining what's
different with a reference to an upstream commit that introduced the
changed behavior.
Related: RHEL-1087
rhel-only
---
test/TEST-81-GENERATORS/Makefile | 1 +
test/TEST-81-GENERATORS/generator-utils.sh | 78 ++++
test/TEST-81-GENERATORS/test.sh | 50 +++
.../testsuite.fstab-generator.sh | 397 ++++++++++++++++++
test/TEST-81-GENERATORS/testsuite.sh | 14 +
test/test-functions | 2 +-
6 files changed, 541 insertions(+), 1 deletion(-)
create mode 120000 test/TEST-81-GENERATORS/Makefile
create mode 100755 test/TEST-81-GENERATORS/generator-utils.sh
create mode 100755 test/TEST-81-GENERATORS/test.sh
create mode 100755 test/TEST-81-GENERATORS/testsuite.fstab-generator.sh
create mode 100755 test/TEST-81-GENERATORS/testsuite.sh
diff --git a/test/TEST-81-GENERATORS/Makefile b/test/TEST-81-GENERATORS/Makefile
new file mode 120000
index 0000000000..e9f93b1104
--- /dev/null
+++ b/test/TEST-81-GENERATORS/Makefile
@@ -0,0 +1 @@
+../TEST-01-BASIC/Makefile
\ No newline at end of file
diff --git a/test/TEST-81-GENERATORS/generator-utils.sh b/test/TEST-81-GENERATORS/generator-utils.sh
new file mode 100755
index 0000000000..fb62747fa1
--- /dev/null
+++ b/test/TEST-81-GENERATORS/generator-utils.sh
@@ -0,0 +1,78 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
+link_endswith() {
+ [[ -h "${1:?}" && "$(readlink "${1:?}")" =~ ${2:?}$ ]]
+}
+
+link_eq() {
+ [[ -h "${1:?}" && "$(readlink "${1:?}")" == "${2:?}" ]]
+}
+
+# Get the value from a 'key=value' assignment
+opt_get_arg() {
+ local arg
+
+ IFS="=" read -r _ arg <<< "${1:?}"
+ test -n "$arg"
+ echo "$arg"
+}
+
+in_initrd() {
+ [[ "${SYSTEMD_IN_INITRD:-0}" -ne 0 ]]
+}
+
+# Check if we're parsing host's fstab in initrd
+in_initrd_host() {
+ in_initrd && [[ "${SYSTEMD_SYSROOT_FSTAB:-/dev/null}" != /dev/null ]]
+}
+
+in_container() {
+ systemd-detect-virt -qc
+}
+
+opt_filter() (
+ set +x
+ local opt split_options filtered_options
+
+ IFS="," read -ra split_options <<< "${1:?}"
+ for opt in "${split_options[@]}"; do
+ if [[ "$opt" =~ ${2:?} ]]; then
+ continue
+ fi
+
+ filtered_options+=("$opt")
+ done
+
+ IFS=","; printf "%s" "${filtered_options[*]}"
+)
+
+# Run the given generator $1 with target directory $2 - clean the target
+# directory beforehand
+run_and_list() {
+ local generator="${1:?}"
+ local out_dir="${2:?}"
+ local environ
+
+ # If $PID1_ENVIRON is set temporarily overmount /proc/1/environ with
+ # a temporary file that contains contents of $PID1_ENVIRON. This is
+ # necessary in cases where the generator reads the environment through
+ # getenv_for_pid(1, ...) or similar like getty-generator does.
+ #
+ # Note: $PID1_ENVIRON should be a NUL separated list of env assignments
+ if [[ -n "${PID1_ENVIRON:-}" ]]; then
+ environ="$(mktemp)"
+ echo -ne "${PID1_ENVIRON}\0" >"${environ:?}"
+ mount -v --bind "$environ" /proc/1/environ
+ fi
+
+ rm -fr "${out_dir:?}"/*
+ mkdir -p "$out_dir"/{normal,early,late}
+ SYSTEMD_LOG_LEVEL="${SYSTEMD_LOG_LEVEL:-debug}" "$generator" "$out_dir/normal" "$out_dir/early" "$out_dir/late"
+ ls -lR "$out_dir"
+
+ if [[ -n "${environ:-}" ]]; then
+ umount /proc/1/environ
+ rm -f "$environ"
+ fi
+}
diff --git a/test/TEST-81-GENERATORS/test.sh b/test/TEST-81-GENERATORS/test.sh
new file mode 100755
index 0000000000..ec9c608c60
--- /dev/null
+++ b/test/TEST-81-GENERATORS/test.sh
@@ -0,0 +1,50 @@
+#!/usr/bin/env bash
+set -e
+TEST_DESCRIPTION="Test systemd generators"
+
+# shellcheck source=test/test-functions
+. "$TEST_BASE_DIR/test-functions"
+
+test_setup() {
+ create_empty_image
+ mkdir -p "${TESTDIR:?}/root"
+ mount "${LOOPDEV:?}p1" "$TESTDIR/root"
+
+ (
+ LOG_LEVEL=5
+ # shellcheck disable=SC2046
+ eval $(udevadm info --export --query=env --name="${LOOPDEV}p2")
+
+ setup_basic_environment
+
+ # mask some services that we do not want to run in these tests
+ ln -fs /dev/null "$initdir/etc/systemd/system/systemd-hwdb-update.service"
+ ln -fs /dev/null "$initdir/etc/systemd/system/systemd-journal-catalog-update.service"
+ ln -fs /dev/null "$initdir/etc/systemd/system/systemd-networkd.service"
+ ln -fs /dev/null "$initdir/etc/systemd/system/systemd-networkd.socket"
+ ln -fs /dev/null "$initdir/etc/systemd/system/systemd-resolved.service"
+ ln -fs /dev/null "$initdir/etc/systemd/system/systemd-machined.service"
+
+ # setup the testsuite service
+ cat >"$initdir/etc/systemd/system/testsuite.service" <<EOF
+[Unit]
+Description=Testsuite service
+
+[Service]
+ExecStart=/bin/bash -x /testsuite.sh
+Type=oneshot
+StandardOutput=tty
+StandardError=tty
+NotifyAccess=all
+EOF
+ cp generator-utils.sh testsuite*.sh "$initdir/"
+
+ setup_testsuite
+ ) || return 1
+ setup_nspawn_root
+
+ ddebug "umount $TESTDIR/root"
+ umount "$TESTDIR/root"
+}
+
+do_test "$@"
diff --git a/test/TEST-81-GENERATORS/testsuite.fstab-generator.sh b/test/TEST-81-GENERATORS/testsuite.fstab-generator.sh
new file mode 100755
index 0000000000..705fd5e5c7
--- /dev/null
+++ b/test/TEST-81-GENERATORS/testsuite.fstab-generator.sh
@@ -0,0 +1,397 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: LGPL-2.1-or-later
+# shellcheck disable=SC2235,SC2233
+set -eux
+set -o pipefail
+
+# shellcheck source=test/TEST-81-GENERATORS/generator-utils.sh
+. "$(dirname "$0")/generator-utils.sh"
+
+GENERATOR_BIN="/usr/lib/systemd/system-generators/systemd-fstab-generator"
+NETWORK_FS_RX="^(afs|ceph|cifs|gfs|gfs2|ncp|ncpfs|nfs|nfs4|ocfs2|orangefs|pvfs2|smb3|smbfs|davfs|glusterfs|lustre|sshfs)$"
+OUT_DIR="$(mktemp -d /tmp/fstab-generator.XXX)"
+FSTAB="$(mktemp)"
+
+at_exit() {
+ rm -fr "${OUT_DIR:?}" "${FSTAB:?}"
+}
+
+trap at_exit EXIT
+
+test -x "${GENERATOR_BIN:?}"
+
+FSTAB_GENERAL=(
+ # Valid entries
+ "/dev/test2 /nofail ext4 nofail 0 0"
+ "/dev/test3 /regular btrfs defaults 0 0"
+ "/dev/test4 /x-systemd.requires xfs x-systemd.requires=foo.service 0 0"
+ "/dev/test5 /x-systemd.before-after xfs x-systemd.before=foo.service,x-systemd.after=bar.mount 0 0"
+# Not supported on RHEL 8
+# "/dev/test6 /x-systemd.wanted-required-by xfs x-systemd.wanted-by=foo.service,x-systemd.required-by=bar.device 0 0"
+ "/dev/test7 /x-systemd.requires-mounts-for xfs x-systemd.requires-mounts-for=/foo/bar/baz 0 0"
+ "/dev/test8 /x-systemd.automount-idle-timeout vfat x-systemd.automount,x-systemd.idle-timeout=50s 0 0"
+ "/dev/test9 /x-systemd.makefs xfs x-systemd.makefs 0 0"
+ "/dev/test10 /x-systemd.growfs xfs x-systemd.growfs 0 0"
+ "/dev/test11 /_netdev ext4 defaults,_netdev 0 0"
+# Not supported on RHEL 8
+# "/dev/test12 /_rwonly ext4 x-systemd.rw-only 0 0"
+ "/dev/test13 /chaos1 zfs x-systemd.requires=hello.service,x-systemd.after=my.device 0 0"
+ "/dev/test14 /chaos2 zfs x-systemd.growfs,x-systemd.makefs 0 0"
+ "/dev/test15 /fstype/auto auto defaults 0 0"
+ "/dev/test16 /fsck/me ext4 defaults 0 1"
+ "/dev/test17 /also/fsck/me ext4 defaults,x-systemd.requires-mounts-for=/var/lib/foo 0 99"
+ "/dev/test18 /swap swap defaults 0 0"
+ "/dev/test19 /swap/makefs swap defaults,x-systemd.makefs 0 0"
+ "/dev/test20 /var xfs defaults,x-systemd.device-timeout=1h 0 0"
+ "/dev/test21 /usr ext4 defaults 0 1"
+ "/dev/test22 /initrd/mount ext2 defaults,x-initrd.mount 0 1"
+ "/dev/test23 /initrd/mount/nofail ext3 defaults,nofail,x-initrd.mount 0 1"
+ "/dev/test24 /initrd/mount/deps ext4 x-initrd.mount,x-systemd.before=early.service,x-systemd.after=late.service 0 1"
+
+ # Incomplete, but valid entries
+ "/dev/incomplete1 /incomplete1"
+ "/dev/incomplete2 /incomplete2 ext4"
+ "/dev/incomplete3 /incomplete3 ext4 defaults"
+ "/dev/incomplete4 /incomplete4 ext4 defaults 0"
+
+ # Remote filesystems
+ "/dev/remote1 /nfs nfs bg 0 0"
+ "/dev/remote2 /nfs4 nfs4 bg 0 0"
+ "bar.tld:/store /remote/storage nfs ro,x-systemd.after=store.service 0 0"
+ "user@host.tld:/remote/dir /remote/top-secret sshfs rw,x-systemd.before=naughty.service 0 0"
+ "foo.tld:/hello /hello/world ceph defaults 0 0"
+ "//192.168.0.1/storage /cifs-storage cifs automount,nofail 0 0"
+)
+
+FSTAB_GENERAL_ROOT=(
+ # rootfs with bunch of options we should ignore and fsck enabled
+ "/dev/test1 / ext4 noauto,nofail,x-systemd.automount,x-systemd.wanted-by=foo,x-systemd.required-by=bar 0 1"
+ "${FSTAB_GENERAL[@]}"
+)
+
+FSTAB_MINIMAL=(
+ "/dev/loop1 /foo/bar ext3 defaults 0 0"
+)
+
+FSTAB_DUPLICATE=(
+ "/dev/dup1 / ext4 defaults 0 1"
+ "/dev/dup2 / ext4 defaults,x-systemd.requires=foo.mount 0 2"
+)
+
+FSTAB_INVALID=(
+ # Ignored entries
+ "/dev/ignored1 /sys/fs/cgroup/foo ext4 defaults 0 0"
+ "/dev/ignored2 /sys/fs/selinux ext4 defaults 0 0"
+ "/dev/ignored3 /dev/console ext4 defaults 0 0"
+ "/dev/ignored4 /proc/kmsg ext4 defaults 0 0"
+ "/dev/ignored5 /proc/sys ext4 defaults 0 0"
+# Not ignored on RHEL 8, see 6f997852c8830ca073c55241b0068ebbf1f94a72
+# "/dev/ignored6 /proc/sys/kernel/random/boot_id ext4 defaults 0 0"
+# "/dev/ignored7 /run/host ext4 defaults 0 0"
+# "/dev/ignored8 /run/host/foo ext4 defaults 0 0"
+ "/dev/ignored9 /autofs autofs defaults 0 0"
+ "/dev/invalid1 not-a-path ext4 defaults 0 0"
+ ""
+ "/dev/invalid1"
+ " "
+ "\\"
+ "$"
+)
+
+check_fstab_mount_units() {
+ local what where fstype opts passno unit
+ local item opt split_options filtered_options supp service device arg
+ local array_name="${1:?}"
+ local out_dir="${2:?}/normal"
+ # Get a reference to the array from its name
+ local -n fstab_entries="$array_name"
+
+ # Running the checks in a container is pretty much useless, since we don't
+ # generate any mounts, but don't skip the whole test to test the "skip"
+ # paths as well
+ in_container && return 0
+
+ for item in "${fstab_entries[@]}"; do
+ # Don't use a pipe here, as it would make the variables out of scope
+ read -r what where fstype opts _ passno <<< "$item"
+
+ # Skip non-initrd mounts in initrd
+ if in_initrd_host && ! [[ "$opts" =~ x-initrd.mount ]]; then
+ continue
+ fi
+
+ if [[ "$fstype" == swap ]]; then
+ unit="$(systemd-escape --suffix=swap --path "${what:?}")"
+ cat "$out_dir/$unit"
+
+ grep -qE "^What=$what$" "$out_dir/$unit"
+ if [[ "$opts" != defaults ]]; then
+ grep -qE "^Options=$opts$" "$out_dir/$unit"
+ fi
+
+ if [[ "$opts" =~ x-systemd.makefs ]]; then
+ service="$(systemd-escape --template=systemd-mkswap@.service --path "$what")"
+ test -e "$out_dir/$service"
+ fi
+
+ continue
+ fi
+
+ # If we're parsing host's fstab in initrd, prefix all mount targets
+ # with /sysroot
+ in_initrd_host && where="/sysroot${where:?}"
+ unit="$(systemd-escape --suffix=mount --path "${where:?}")"
+ cat "$out_dir/$unit"
+
+ # Check the general stuff
+ grep -qE "^What=$what$" "$out_dir/$unit"
+ grep -qE "^Where=$where$" "$out_dir/$unit"
+ if [[ -n "$fstype" ]] && [[ "$fstype" != auto ]]; then
+ grep -qE "^Type=$fstype$" "$out_dir/$unit"
+ fi
+ if [[ -n "$opts" ]] && [[ "$opts" != defaults ]]; then
+ # Some options are not propagated to the generated unit
+ if [[ "$where" == / ]]; then
+ filtered_options="$(opt_filter "$opts" "(noauto|nofail|x-systemd.(wanted-by=|required-by=|automount|device-timeout=))")"
+ else
+ filtered_options="$(opt_filter "$opts" "^x-systemd.device-timeout=")"
+ fi
+
+ if [[ "${filtered_options[*]}" != defaults ]]; then
+ grep -qE "^Options=.*$filtered_options.*$" "$out_dir/$unit"
+ fi
+ fi
+
+ if ! [[ "$opts" =~ (noauto|x-systemd.(wanted-by=|required-by=|automount)) ]]; then
+ # We don't create the Requires=/Wants= symlinks for noauto/automount mounts
+ # and for mounts that use x-systemd.wanted-by=/required-by=
+ if in_initrd_host; then
+ if [[ "$where" == / ]] || ! [[ "$opts" =~ nofail ]]; then
+ link_eq "$out_dir/initrd-fs.target.requires/$unit" "../$unit"
+ else
+ link_eq "$out_dir/initrd-fs.target.wants/$unit" "../$unit"
+ fi
+ elif [[ "$fstype" =~ $NETWORK_FS_RX || "$opts" =~ _netdev ]]; then
+ # Units with network filesystems should have a Requires= dependency
+ # on the remote-fs.target, unless they use nofail or are an nfs "bg"
+ # mounts, in which case the dependency is downgraded to Wants=
+ if [[ "$opts" =~ nofail ]] || [[ "$fstype" =~ ^(nfs|nfs4) && "$opts" =~ bg ]]; then
+ link_eq "$out_dir/remote-fs.target.wants/$unit" "../$unit"
+ else
+ link_eq "$out_dir/remote-fs.target.requires/$unit" "../$unit"
+ fi
+ else
+ # Similarly, local filesystems should have a Requires= dependency on
+ # the local-fs.target, unless they use nofail, in which case the
+ # dependency is downgraded to Wants=. Rootfs is a special case,
+ # since we always ignore nofail there
+ if [[ "$where" == / ]] || ! [[ "$opts" =~ nofail ]]; then
+ link_eq "$out_dir/local-fs.target.requires/$unit" "../$unit"
+ else
+ link_eq "$out_dir/local-fs.target.wants/$unit" "../$unit"
+ fi
+ fi
+ fi
+
+ if [[ "${passno:=0}" -ne 0 ]]; then
+ # Generate systemd-fsck@.service dependencies, if applicable
+ if in_initrd && [[ "$where" == / || "$where" == /usr ]]; then
+ continue
+ fi
+
+ if [[ "$where" == / ]]; then
+ link_endswith "$out_dir/local-fs.target.wants/systemd-fsck-root.service" "/lib/systemd/system/systemd-fsck-root.service"
+ else
+ service="$(systemd-escape --template=systemd-fsck@.service --path "$what")"
+ grep -qE "^After=$service$" "$out_dir/$unit"
+ # On RHEL 8 this is always a Requires= dependency, even when the target
+ # is /usr, see afacf3fc8af0090620383228c6c84345ad63b6f8
+ grep -qE "^Requires=$service$" "$out_dir/$unit"
+ fi
+ fi
+
+ # Check various x-systemd options
+ #
+ # First, split them into an array to make splitting them even further
+ # easier
+ IFS="," read -ra split_options <<< "$opts"
+ # and process them one by one.
+ #
+ # Note: the "machinery" below might (and probably does) miss some
+ # combinations of supported options, so tread carefully
+ for opt in "${split_options[@]}"; do
+ if [[ "$opt" =~ ^x-systemd.requires= ]]; then
+ service="$(opt_get_arg "$opt")"
+ grep -qE "^Requires=$service$" "$out_dir/$unit"
+ grep -qE "^After=$service$" "$out_dir/$unit"
+ elif [[ "$opt" =~ ^x-systemd.before= ]]; then
+ service="$(opt_get_arg "$opt")"
+ grep -qE "^Before=$service$" "$out_dir/$unit"
+ elif [[ "$opt" =~ ^x-systemd.after= ]]; then
+ service="$(opt_get_arg "$opt")"
+ grep -qE "^After=$service$" "$out_dir/$unit"
+ elif [[ "$opt" =~ ^x-systemd.wanted-by= ]]; then
+ service="$(opt_get_arg "$opt")"
+ if [[ "$where" == / ]]; then
+ # This option is ignored for rootfs mounts
+ (! link_eq "$out_dir/$service.wants/$unit" "../$unit")
+ else
+ link_eq "$out_dir/$service.wants/$unit" "../$unit"
+ fi
+ elif [[ "$opt" =~ ^x-systemd.required-by= ]]; then
+ service="$(opt_get_arg "$opt")"
+ if [[ "$where" == / ]]; then
+ # This option is ignored for rootfs mounts
+ (! link_eq "$out_dir/$service.requires/$unit" "../$unit")
+ else
+ link_eq "$out_dir/$service.requires/$unit" "../$unit"
+ fi
+ elif [[ "$opt" =~ ^x-systemd.requires-mounts-for= ]]; then
+ arg="$(opt_get_arg "$opt")"
+ grep -qE "^RequiresMountsFor=$arg$" "$out_dir/$unit"
+ elif [[ "$opt" == x-systemd.device-bound ]]; then
+ # This is implied for fstab mounts
+ :
+ elif [[ "$opt" == x-systemd.automount ]]; then
+ # The $unit should have an accompanying automount unit
+ supp="$(systemd-escape --suffix=automount --path "$where")"
+ if [[ "$where" == / ]]; then
+ # This option is ignored for rootfs mounts
+ test ! -e "$out_dir/$supp"
+ (! link_eq "$out_dir/local-fs.target.requires/$supp" "../$supp")
+ else
+ test -e "$out_dir/$supp"
+ link_eq "$out_dir/local-fs.target.requires/$supp" "../$supp"
+ fi
+ elif [[ "$opt" =~ ^x-systemd.idle-timeout= ]]; then
+ # The timeout applies to the automount unit, not the original
+ # mount one
+ arg="$(opt_get_arg "$opt")"
+ supp="$(systemd-escape --suffix=automount --path "$where")"
+ grep -qE "^TimeoutIdleSec=$arg$" "$out_dir/$supp"
+ elif [[ "$opt" =~ ^x-systemd.device-timeout= ]]; then
+ arg="$(opt_get_arg "$opt")"
+ device="$(systemd-escape --suffix=device --path "$what")"
+ grep -qE "^JobRunningTimeoutSec=$arg$" "$out_dir/${device}.d/50-device-timeout.conf"
+ elif [[ "$opt" == x-systemd.makefs ]]; then
+ # In RHEL8 the unit is called systemd-mkfs@.service, see
+ # 804f8e1729e7663c75a88fcf0997539442b891d7
+ service="$(systemd-escape --template=systemd-mkfs@.service --path "$what")"
+ test -e "$out_dir/$service"
+ link_eq "$out_dir/${unit}.requires/$service" "../$service"
+ elif [[ "$opt" == x-systemd.rw-only ]]; then
+ grep -qE "^ReadWriteOnly=yes$" "$out_dir/$unit"
+ elif [[ "$opt" == x-systemd.growfs ]]; then
+ service="$(systemd-escape --template=systemd-growfs@.service --path "$where")"
+ # Another deviation from upstream, see 50072ccf1bfee8a53563a083a3a52b26f0d5678f
+ link_eq "$out_dir/${unit}.wants/$service" "../$service"
+ elif [[ "$opt" == bg ]] && [[ "$fstype" =~ ^(nfs|nfs4)$ ]]; then
+ # We "convert" nfs bg mounts to fg, so we can do the job-control
+ # ourselves
+ grep -qE "^Options=.*\bx-systemd.mount-timeout=infinity\b" "$out_dir/$unit"
+ grep -qE "^Options=.*\bfg\b.*" "$out_dir/$unit"
+ elif [[ "$opt" =~ ^x-systemd\. ]]; then
+ echo >&2 "Unhandled mount option: $opt"
+ exit 1
+ fi
+ done
+ done
+}
+
+: "fstab-generator: regular"
+printf "%s\n" "${FSTAB_GENERAL_ROOT[@]}" >"$FSTAB"
+cat "$FSTAB"
+SYSTEMD_FSTAB="$FSTAB" run_and_list "$GENERATOR_BIN" "$OUT_DIR"
+check_fstab_mount_units FSTAB_GENERAL_ROOT "$OUT_DIR"
+
+# Skip the rest when running in a container, as it makes little sense to check
+# initrd-related stuff there and fstab-generator might have a bit strange
+# behavior during certain tests, like https://github.com/systemd/systemd/issues/27156
+if in_container; then
+ echo "Running in a container, skipping the rest of the fstab-generator tests..."
+ exit 0
+fi
+
+# In this mode we treat the entries as "regular" ones
+: "fstab-generator: initrd - initrd fstab"
+printf "%s\n" "${FSTAB_GENERAL[@]}" >"$FSTAB"
+cat "$FSTAB"
+SYSTEMD_IN_INITRD=1 SYSTEMD_FSTAB="$FSTAB" SYSTEMD_SYSROOT_FSTAB=/dev/null run_and_list "$GENERATOR_BIN" "$OUT_DIR"
+SYSTEMD_IN_INITRD=1 SYSTEMD_FSTAB="$FSTAB" SYSTEMD_SYSROOT_FSTAB=/dev/null check_fstab_mount_units FSTAB_GENERAL "$OUT_DIR"
+
+# In this mode we prefix the mount target with /sysroot and ignore all mounts
+# that don't have the x-initrd.mount flag
+: "fstab-generator: initrd - host fstab"
+printf "%s\n" "${FSTAB_GENERAL_ROOT[@]}" >"$FSTAB"
+cat "$FSTAB"
+SYSTEMD_IN_INITRD=1 SYSTEMD_FSTAB=/dev/null SYSTEMD_SYSROOT_FSTAB="$FSTAB" run_and_list "$GENERATOR_BIN" "$OUT_DIR"
+SYSTEMD_IN_INITRD=1 SYSTEMD_FSTAB=/dev/null SYSTEMD_SYSROOT_FSTAB="$FSTAB" check_fstab_mount_units FSTAB_GENERAL_ROOT "$OUT_DIR"
+
+# Check the default stuff that we (almost) always create in initrd
+: "fstab-generator: initrd default"
+SYSTEMD_IN_INITRD=1 SYSTEMD_FSTAB=/dev/null SYSTEMD_SYSROOT_FSTAB=/dev/null run_and_list "$GENERATOR_BIN" "$OUT_DIR"
+test -e "$OUT_DIR/normal/sysroot.mount"
+test -e "$OUT_DIR/normal/systemd-fsck-root.service"
+link_eq "$OUT_DIR/normal/initrd-root-fs.target.requires/sysroot.mount" "../sysroot.mount"
+link_eq "$OUT_DIR/normal/initrd-root-fs.target.requires/sysroot.mount" "../sysroot.mount"
+
+# systemd-sysroot-fstab-check is not in RHEL 8
+
+: "fstab-generator: duplicate"
+printf "%s\n" "${FSTAB_DUPLICATE[@]}" >"$FSTAB"
+cat "$FSTAB"
+(! SYSTEMD_FSTAB="$FSTAB" run_and_list "$GENERATOR_BIN" "$OUT_DIR")
+
+: "fstab-generator: invalid"
+printf "%s\n" "${FSTAB_INVALID[@]}" >"$FSTAB"
+cat "$FSTAB"
+# Don't care about the exit code here
+SYSTEMD_FSTAB="$FSTAB" run_and_list "$GENERATOR_BIN" "$OUT_DIR" || :
+# No mounts should get created here
+[[ "$(find "$OUT_DIR" -name "*.mount" | wc -l)" -eq 0 ]]
+
+: "fstab-generator: kernel args - fstab=0"
+printf "%s\n" "${FSTAB_MINIMAL[@]}" >"$FSTAB"
+SYSTEMD_FSTAB="$FSTAB" SYSTEMD_PROC_CMDLINE="fstab=0" run_and_list "$GENERATOR_BIN" "$OUT_DIR"
+(! SYSTEMD_FSTAB="$FSTAB" check_fstab_mount_units FSTAB_MINIMAL "$OUT_DIR")
+SYSTEMD_IN_INITRD=1 SYSTEMD_FSTAB="$FSTAB" SYSTEMD_PROC_CMDLINE="fstab=0" run_and_list "$GENERATOR_BIN" "$OUT_DIR"
+(! SYSTEMD_IN_INITRD=1 SYSTEMD_FSTAB="$FSTAB" check_fstab_mount_units FSTAB_MINIMAL "$OUT_DIR")
+
+: "fstab-generator: kernel args - rd.fstab=0"
+printf "%s\n" "${FSTAB_MINIMAL[@]}" >"$FSTAB"
+SYSTEMD_FSTAB="$FSTAB" SYSTEMD_PROC_CMDLINE="rd.fstab=0" run_and_list "$GENERATOR_BIN" "$OUT_DIR"
+SYSTEMD_FSTAB="$FSTAB" check_fstab_mount_units FSTAB_MINIMAL "$OUT_DIR"
+SYSTEMD_IN_INITRD=1 SYSTEMD_FSTAB="$FSTAB" SYSTEMD_PROC_CMDLINE="rd.fstab=0" run_and_list "$GENERATOR_BIN" "$OUT_DIR"
+(! SYSTEMD_IN_INITRD=1 SYSTEMD_FSTAB="$FSTAB" check_fstab_mount_units FSTAB_MINIMAL "$OUT_DIR")
+
+# systemd.swap kernel cmdline arguments is not supported on RHEL 8, see
+# 567a5307601728c618546c584f63307283fa8def
+
+# Possible TODO
+# - combine the rootfs & usrfs arguments and mix them with fstab entries
+# - systemd.volatile=
+: "fstab-generator: kernel args - root= + rootfstype= + rootflags="
+# shellcheck disable=SC2034
+EXPECTED_FSTAB=(
+ "/dev/disk/by-label/rootfs / ext4 noexec,ro 0 1"
+)
+CMDLINE="root=LABEL=rootfs rootfstype=ext4 rootflags=noexec"
+SYSTEMD_IN_INITRD=1 SYSTEMD_FSTAB=/dev/null SYSTEMD_SYSROOT_FSTAB=/dev/null SYSTEMD_PROC_CMDLINE="$CMDLINE" run_and_list "$GENERATOR_BIN" "$OUT_DIR"
+# The /proc/cmdline here is a dummy value to tell the in_initrd_host() function
+# we're parsing host's fstab, but it's all on the kernel cmdline instead
+SYSTEMD_IN_INITRD=1 SYSTEMD_SYSROOT_FSTAB=/proc/cmdline check_fstab_mount_units EXPECTED_FSTAB "$OUT_DIR"
+
+# This is a very basic sanity test that involves manual checks, since adding it
+# to the check_fstab_mount_units() function would make it way too complex
+# (yet another possible TODO)
+: "fstab-generator: kernel args - mount.usr= + mount.usrfstype= + mount.usrflags="
+CMDLINE="mount.usr=UUID=be780f43-8803-4a76-9732-02ceda6e9808 mount.usrfstype=ext4 mount.usrflags=noexec,nodev"
+SYSTEMD_IN_INITRD=1 SYSTEMD_FSTAB=/dev/null SYSTEMD_SYSROOT_FSTAB=/dev/null SYSTEMD_PROC_CMDLINE="$CMDLINE" run_and_list "$GENERATOR_BIN" "$OUT_DIR"
+cat "$OUT_DIR/normal/sysroot-usr.mount"
+# We don't do the /sysusr/usr/ -> /sysroot/usr/ dance on RHEL 8, see
+# 29a24ab28e9790680348b1ffab653a321fa49a67
+grep -qE "^What=/dev/disk/by-uuid/be780f43-8803-4a76-9732-02ceda6e9808$" "$OUT_DIR/normal/sysroot-usr.mount"
+grep -qE "^Where=/sysroot/usr$" "$OUT_DIR/normal/sysroot-usr.mount"
+grep -qE "^Type=ext4$" "$OUT_DIR/normal/sysroot-usr.mount"
+grep -qE "^Options=noexec,nodev,ro$" "$OUT_DIR/normal/sysroot-usr.mount"
+link_eq "$OUT_DIR/normal/initrd-fs.target.requires/sysroot-usr.mount" "../sysroot-usr.mount"
diff --git a/test/TEST-81-GENERATORS/testsuite.sh b/test/TEST-81-GENERATORS/testsuite.sh
new file mode 100755
index 0000000000..13c767e490
--- /dev/null
+++ b/test/TEST-81-GENERATORS/testsuite.sh
@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: LGPL-2.1-or-later
+set -eux
+set -o pipefail
+
+: >/failed
+
+for script in "${0%.sh}".*.sh; do
+ echo "Running $script"
+ "./$script"
+done
+
+touch /testok
+rm /failed
diff --git a/test/test-functions b/test/test-functions
index f0cf6f8575..2345ab6e8a 100644
--- a/test/test-functions
+++ b/test/test-functions
@@ -23,7 +23,7 @@ fi
PATH_TO_INIT=$ROOTLIBDIR/systemd
-BASICTOOLS="test sh bash setsid loadkeys setfont login sulogin gzip sleep echo mount umount cryptsetup date dmsetup modprobe sed cmp tee rm true false chmod chown ln xargs env mktemp mountpoint useradd userdel timeout jq wc awk diff"
+BASICTOOLS="test sh bash setsid loadkeys setfont login sulogin gzip sleep echo mount umount cryptsetup date dmsetup modprobe sed cmp tee rm true false chmod chown ln xargs env mktemp mountpoint useradd userdel timeout jq wc awk diff dirname readlink"
DEBUGTOOLS="df free ls stty cat ps ln ip route dmesg dhclient mkdir cp ping dhclient strace less grep id tty touch du sort hostname find"
STATEDIR="${BUILD_DIR:-.}/test/$(basename $(dirname $(realpath $0)))"
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