test: add test for quotas on Exec directories

mkosi/mkosi.repart/20-disk.conf

@@ -0,0 +1,5 @@
+[Partition]
+Type=linux-generic
+Format=ext4
+SizeMinBytes=498M
+SizeMaxBytes=498M

test/units/TEST-07-PID1.quota.sh

@@ -0,0 +1,95 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: LGPL-2.1-or-later
+# shellcheck disable=SC2016
+set -eux
+set -o pipefail
+
+systemd-analyze log-level debug
+
+test_quotas() {
+
+    local directory="$1"
+    local exec_directory_directive="$2"
+    local exec_quota_directive="$3"
+    local mountpoint="/datadrive"
+
+    dev_num=$(lsblk | grep "498M" | awk '{print $1}' | sed 's/[^a-zA-Z0-9]*//g')
+
+    if ! tune2fs -Q prjquota "/dev/${dev_num}"; then
+        return
+    fi
+    mkdir -p "${mountpoint}"
+    mount "/dev/${dev_num}" "${mountpoint}"
+
+    mv /var/lib/ "${mountpoint}"
+    rm -rf /var/lib/ && ln -s "${mountpoint}/lib/" /var/
+
+    rm -rf "${directory}/quotadir"
+
+    cat >/run/systemd/system/testservice-07-check-quotas.service <<EOF
+[Unit]
+Description=Check quotas with ExecDirectory
+
+[Service]
+# Relevant only for sanitizer runs
+EnvironmentFile=-/usr/lib/systemd/systemd-asan-env
+Type=oneshot
+
+MountAPIVFS=yes
+DynamicUser=yes
+PrivateUsers=yes
+TemporaryFileSystem=/run /var/opt /var/lib /vol
+${exec_directory_directive}
+${exec_quota_directive}
+ExecStart=/bin/bash -c ' \
+    set -eux; \
+    set -o pipefail; \
+    touch ${directory}/quotadir/testfile; \
+'
+EOF
+
+    systemctl daemon-reload
+    systemctl start testservice-07-check-quotas.service
+
+    proj_id=$(lsattr -p "${directory}" | grep "quotadir" | awk '{print $1}')
+    [[ $proj_id -gt 0 ]]
+
+    block_limit=$(repquota -P "${mountpoint}" | grep -E "#$proj_id " | awk '{print $5}')
+    inode_limit=$(repquota -P "${mountpoint}" | grep -E "#$proj_id " | awk '{print $8}')
+    [[ $block_limit -gt 0 ]]
+    [[ $inode_limit -gt 0 ]]
+
+    # Test exceed limit
+    rm -rf "${directory}/quotadir"
+
+    cat >/run/systemd/system/testservice-07-check-quotas.service <<EOF
+[Unit]
+Description=Check quotas with ExecDirectory
+
+[Service]
+# Relevant only for sanitizer runs
+EnvironmentFile=-/usr/lib/systemd/systemd-asan-env
+Type=oneshot
+
+MountAPIVFS=yes
+DynamicUser=yes
+PrivateUsers=yes
+TemporaryFileSystem=/run /var/opt /var/lib /vol
+${exec_directory_directive}
+${exec_quota_directive}
+ExecStart=/bin/bash -c ' \
+    set -eux; \
+    set -o pipefail; \
+    (! fallocate -l 10000G ${directory}/quotadir/largefile); \
+'
+EOF
+
+    systemctl daemon-reload
+    systemctl start testservice-07-check-quotas.service
+}
+
+test_quotas "/var/lib/private" "StateDirectory=quotadir" "StateDirectoryQuota=1%"
+
+systemd-analyze log-level info
+
+touch /testok