core: add quota support for State, Cache, and Log exec directories

docs/DISK-QUOTAS-PROJECTIDS.md

@@ -0,0 +1,14 @@
+---
+title: Project IDs for Disk Quotas on Exec Directories
+category: Exec directories
+layout: default
+SPDX-License-Identifier: LGPL-2.1-or-later
+---
+
+# Project IDs on systemd Systems
+
+Project IDs are needed to enforce disk quotas for Exec Directories.
+Project IDs are unsigned, 32-bit integers. For disk quota enforcement,
+the range used is 2147483648 - 4294967294, which is the highest range
+inspired from `UIDS-GUID.md`. The range is defined through `PROJ_ID_MIN`
+and `PROJ_ID_MAX` in `exec-invoke.c`.

docs/TRANSIENT-SETTINGS.md

@@ -257,10 +257,16 @@ All execution-related settings are available for transient units.
 ✓ RuntimeDirectoryMode=
 ✓ RuntimeDirectory=
 ✓ StateDirectoryMode=
+✓ StateDirectoryAccounting=
+✓ StateDirectoryQuota=
 ✓ StateDirectory=
 ✓ CacheDirectoryMode=
+✓ CacheDirectoryAccounting=
+✓ CacheDirectoryQuota=
 ✓ CacheDirectory=
 ✓ LogsDirectoryMode=
+✓ LogsDirectoryAccounting=
+✓ LogsDirectoryQuota=
 ✓ LogsDirectory=
 ✓ ConfigurationDirectoryMode=
 ✓ ConfigurationDirectory=

man/org.freedesktop.systemd1.xml

@@ -3288,18 +3288,30 @@ node /org/freedesktop/systemd1/unit/avahi_2ddaemon_2eservice {
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly u StateDirectoryMode = ...;
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
+      readonly b StateDirectoryAccounting = ...;
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
+      readonly (tus) StateDirectoryQuota = ...;
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly as StateDirectory = ['...', ...];
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly a(sst) CacheDirectorySymlink = [...];
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly u CacheDirectoryMode = ...;
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
+      readonly b CacheDirectoryAccounting = ...;
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
+      readonly (tus) CacheDirectoryQuota = ...;
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly as CacheDirectory = ['...', ...];
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly a(sst) LogsDirectorySymlink = [...];
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly u LogsDirectoryMode = ...;
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
+      readonly b LogsDirectoryAccounting = ...;
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
+      readonly (tus) LogsDirectoryQuota = ...;
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly as LogsDirectory = ['...', ...];
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly u ConfigurationDirectoryMode = ...;
@@ -3351,6 +3363,12 @@ node /org/freedesktop/systemd1/unit/avahi_2ddaemon_2eservice {
       readonly s MountImagePolicy = '...';
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly s ExtensionImagePolicy = '...';
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
+      readonly (tt) StateDirectoryQuotaUsage = ...;
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
+      readonly (tt) CacheDirectoryQuotaUsage = ...;
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
+      readonly (tt) LogsDirectoryQuotaUsage = ...;
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly s KillMode = '...';
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
@@ -3885,10 +3903,22 @@ node /org/freedesktop/systemd1/unit/avahi_2ddaemon_2eservice {
 
     <!--property StateDirectoryMode is not documented!-->
 
+    <!--property StateDirectoryAccounting is not documented!-->
+
+    <!--property StateDirectoryQuota is not documented!-->
+
     <!--property CacheDirectoryMode is not documented!-->
 
+    <!--property CacheDirectoryAccounting is not documented!-->
+
+    <!--property CacheDirectoryQuota is not documented!-->
+
     <!--property LogsDirectoryMode is not documented!-->
 
+    <!--property LogsDirectoryAccounting is not documented!-->
+
+    <!--property LogsDirectoryQuota is not documented!-->
+
     <!--property ConfigurationDirectoryMode is not documented!-->
 
     <!--property ConfigurationDirectory is not documented!-->
@@ -3935,6 +3965,12 @@ node /org/freedesktop/systemd1/unit/avahi_2ddaemon_2eservice {
 
     <!--property ExtensionImagePolicy is not documented!-->
 
+    <!--property StateDirectoryQuotaUsage is not documented!-->
+
+    <!--property CacheDirectoryQuotaUsage is not documented!-->
+
+    <!--property LogsDirectoryQuotaUsage is not documented!-->
+
     <!--property KillMode is not documented!-->
 
     <!--property KillSignal is not documented!-->
@@ -4579,18 +4615,30 @@ node /org/freedesktop/systemd1/unit/avahi_2ddaemon_2eservice {
 
     <variablelist class="dbus-property" generated="True" extra-ref="StateDirectoryMode"/>
 
+    <variablelist class="dbus-property" generated="True" extra-ref="StateDirectoryAccounting"/>
+
+    <variablelist class="dbus-property" generated="True" extra-ref="StateDirectoryQuota"/>
+
     <variablelist class="dbus-property" generated="True" extra-ref="StateDirectory"/>
 
     <variablelist class="dbus-property" generated="True" extra-ref="CacheDirectorySymlink"/>
 
     <variablelist class="dbus-property" generated="True" extra-ref="CacheDirectoryMode"/>
 
+    <variablelist class="dbus-property" generated="True" extra-ref="CacheDirectoryAccounting"/>
+
+    <variablelist class="dbus-property" generated="True" extra-ref="CacheDirectoryQuota"/>
+
     <variablelist class="dbus-property" generated="True" extra-ref="CacheDirectory"/>
 
     <variablelist class="dbus-property" generated="True" extra-ref="LogsDirectorySymlink"/>
 
     <variablelist class="dbus-property" generated="True" extra-ref="LogsDirectoryMode"/>
 
+    <variablelist class="dbus-property" generated="True" extra-ref="LogsDirectoryAccounting"/>
+
+    <variablelist class="dbus-property" generated="True" extra-ref="LogsDirectoryQuota"/>
+
     <variablelist class="dbus-property" generated="True" extra-ref="LogsDirectory"/>
 
     <variablelist class="dbus-property" generated="True" extra-ref="ConfigurationDirectoryMode"/>
@@ -4643,6 +4691,12 @@ node /org/freedesktop/systemd1/unit/avahi_2ddaemon_2eservice {
 
     <variablelist class="dbus-property" generated="True" extra-ref="ExtensionImagePolicy"/>
 
+    <variablelist class="dbus-property" generated="True" extra-ref="StateDirectoryQuotaUsage"/>
+
+    <variablelist class="dbus-property" generated="True" extra-ref="CacheDirectoryQuotaUsage"/>
+
+    <variablelist class="dbus-property" generated="True" extra-ref="LogsDirectoryQuotaUsage"/>
+
     <variablelist class="dbus-property" generated="True" extra-ref="KillMode"/>
 
     <variablelist class="dbus-property" generated="True" extra-ref="KillSignal"/>
@@ -5443,18 +5497,30 @@ node /org/freedesktop/systemd1/unit/avahi_2ddaemon_2esocket {
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly u StateDirectoryMode = ...;
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
+      readonly b StateDirectoryAccounting = ...;
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
+      readonly (tus) StateDirectoryQuota = ...;
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly as StateDirectory = ['...', ...];
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly a(sst) CacheDirectorySymlink = [...];
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly u CacheDirectoryMode = ...;
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
+      readonly b CacheDirectoryAccounting = ...;
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
+      readonly (tus) CacheDirectoryQuota = ...;
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly as CacheDirectory = ['...', ...];
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly a(sst) LogsDirectorySymlink = [...];
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly u LogsDirectoryMode = ...;
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
+      readonly b LogsDirectoryAccounting = ...;
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
+      readonly (tus) LogsDirectoryQuota = ...;
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly as LogsDirectory = ['...', ...];
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly u ConfigurationDirectoryMode = ...;
@@ -5506,6 +5572,12 @@ node /org/freedesktop/systemd1/unit/avahi_2ddaemon_2esocket {
       readonly s MountImagePolicy = '...';
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly s ExtensionImagePolicy = '...';
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
+      readonly (tt) StateDirectoryQuotaUsage = ...;
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
+      readonly (tt) CacheDirectoryQuotaUsage = ...;
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
+      readonly (tt) LogsDirectoryQuotaUsage = ...;
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly s KillMode = '...';
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
@@ -6060,10 +6132,22 @@ node /org/freedesktop/systemd1/unit/avahi_2ddaemon_2esocket {
 
     <!--property StateDirectoryMode is not documented!-->
 
+    <!--property StateDirectoryAccounting is not documented!-->
+
+    <!--property StateDirectoryQuota is not documented!-->
+
     <!--property CacheDirectoryMode is not documented!-->
 
+    <!--property CacheDirectoryAccounting is not documented!-->
+
+    <!--property CacheDirectoryQuota is not documented!-->
+
     <!--property LogsDirectoryMode is not documented!-->
 
+    <!--property LogsDirectoryAccounting is not documented!-->
+
+    <!--property LogsDirectoryQuota is not documented!-->
+
     <!--property ConfigurationDirectoryMode is not documented!-->
 
     <!--property ConfigurationDirectory is not documented!-->
@@ -6110,6 +6194,12 @@ node /org/freedesktop/systemd1/unit/avahi_2ddaemon_2esocket {
 
     <!--property ExtensionImagePolicy is not documented!-->
 
+    <!--property StateDirectoryQuotaUsage is not documented!-->
+
+    <!--property CacheDirectoryQuotaUsage is not documented!-->
+
+    <!--property LogsDirectoryQuotaUsage is not documented!-->
+
     <!--property KillMode is not documented!-->
 
     <!--property KillSignal is not documented!-->
@@ -6734,18 +6824,30 @@ node /org/freedesktop/systemd1/unit/avahi_2ddaemon_2esocket {
 
     <variablelist class="dbus-property" generated="True" extra-ref="StateDirectoryMode"/>
 
+    <variablelist class="dbus-property" generated="True" extra-ref="StateDirectoryAccounting"/>
+
+    <variablelist class="dbus-property" generated="True" extra-ref="StateDirectoryQuota"/>
+
     <variablelist class="dbus-property" generated="True" extra-ref="StateDirectory"/>
 
     <variablelist class="dbus-property" generated="True" extra-ref="CacheDirectorySymlink"/>
 
     <variablelist class="dbus-property" generated="True" extra-ref="CacheDirectoryMode"/>
 
+    <variablelist class="dbus-property" generated="True" extra-ref="CacheDirectoryAccounting"/>
+
+    <variablelist class="dbus-property" generated="True" extra-ref="CacheDirectoryQuota"/>
+
     <variablelist class="dbus-property" generated="True" extra-ref="CacheDirectory"/>
 
     <variablelist class="dbus-property" generated="True" extra-ref="LogsDirectorySymlink"/>
 
     <variablelist class="dbus-property" generated="True" extra-ref="LogsDirectoryMode"/>
 
+    <variablelist class="dbus-property" generated="True" extra-ref="LogsDirectoryAccounting"/>
+
+    <variablelist class="dbus-property" generated="True" extra-ref="LogsDirectoryQuota"/>
+
     <variablelist class="dbus-property" generated="True" extra-ref="LogsDirectory"/>
 
     <variablelist class="dbus-property" generated="True" extra-ref="ConfigurationDirectoryMode"/>
@@ -6798,6 +6900,12 @@ node /org/freedesktop/systemd1/unit/avahi_2ddaemon_2esocket {
 
     <variablelist class="dbus-property" generated="True" extra-ref="ExtensionImagePolicy"/>
 
+    <variablelist class="dbus-property" generated="True" extra-ref="StateDirectoryQuotaUsage"/>
+
+    <variablelist class="dbus-property" generated="True" extra-ref="CacheDirectoryQuotaUsage"/>
+
+    <variablelist class="dbus-property" generated="True" extra-ref="LogsDirectoryQuotaUsage"/>
+
     <variablelist class="dbus-property" generated="True" extra-ref="KillMode"/>
 
     <variablelist class="dbus-property" generated="True" extra-ref="KillSignal"/>
@@ -7422,18 +7530,30 @@ node /org/freedesktop/systemd1/unit/home_2emount {
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly u StateDirectoryMode = ...;
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
+      readonly b StateDirectoryAccounting = ...;
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
+      readonly (tus) StateDirectoryQuota = ...;
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly as StateDirectory = ['...', ...];
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly a(sst) CacheDirectorySymlink = [...];
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly u CacheDirectoryMode = ...;
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
+      readonly b CacheDirectoryAccounting = ...;
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
+      readonly (tus) CacheDirectoryQuota = ...;
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly as CacheDirectory = ['...', ...];
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly a(sst) LogsDirectorySymlink = [...];
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly u LogsDirectoryMode = ...;
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
+      readonly b LogsDirectoryAccounting = ...;
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
+      readonly (tus) LogsDirectoryQuota = ...;
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly as LogsDirectory = ['...', ...];
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly u ConfigurationDirectoryMode = ...;
@@ -7485,6 +7605,12 @@ node /org/freedesktop/systemd1/unit/home_2emount {
       readonly s MountImagePolicy = '...';
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly s ExtensionImagePolicy = '...';
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
+      readonly (tt) StateDirectoryQuotaUsage = ...;
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
+      readonly (tt) CacheDirectoryQuotaUsage = ...;
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
+      readonly (tt) LogsDirectoryQuotaUsage = ...;
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly s KillMode = '...';
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
@@ -7961,10 +8087,22 @@ node /org/freedesktop/systemd1/unit/home_2emount {
 
     <!--property StateDirectoryMode is not documented!-->
 
+    <!--property StateDirectoryAccounting is not documented!-->
+
+    <!--property StateDirectoryQuota is not documented!-->
+
     <!--property CacheDirectoryMode is not documented!-->
 
+    <!--property CacheDirectoryAccounting is not documented!-->
+
+    <!--property CacheDirectoryQuota is not documented!-->
+
     <!--property LogsDirectoryMode is not documented!-->
 
+    <!--property LogsDirectoryAccounting is not documented!-->
+
+    <!--property LogsDirectoryQuota is not documented!-->
+
     <!--property ConfigurationDirectoryMode is not documented!-->
 
     <!--property ConfigurationDirectory is not documented!-->
@@ -8011,6 +8149,12 @@ node /org/freedesktop/systemd1/unit/home_2emount {
 
     <!--property ExtensionImagePolicy is not documented!-->
 
+    <!--property StateDirectoryQuotaUsage is not documented!-->
+
+    <!--property CacheDirectoryQuotaUsage is not documented!-->
+
+    <!--property LogsDirectoryQuotaUsage is not documented!-->
+
     <!--property KillMode is not documented!-->
 
     <!--property KillSignal is not documented!-->
@@ -8543,18 +8687,30 @@ node /org/freedesktop/systemd1/unit/home_2emount {
 
     <variablelist class="dbus-property" generated="True" extra-ref="StateDirectoryMode"/>
 
+    <variablelist class="dbus-property" generated="True" extra-ref="StateDirectoryAccounting"/>
+
+    <variablelist class="dbus-property" generated="True" extra-ref="StateDirectoryQuota"/>
+
     <variablelist class="dbus-property" generated="True" extra-ref="StateDirectory"/>
 
     <variablelist class="dbus-property" generated="True" extra-ref="CacheDirectorySymlink"/>
 
     <variablelist class="dbus-property" generated="True" extra-ref="CacheDirectoryMode"/>
 
+    <variablelist class="dbus-property" generated="True" extra-ref="CacheDirectoryAccounting"/>
+
+    <variablelist class="dbus-property" generated="True" extra-ref="CacheDirectoryQuota"/>
+
     <variablelist class="dbus-property" generated="True" extra-ref="CacheDirectory"/>
 
     <variablelist class="dbus-property" generated="True" extra-ref="LogsDirectorySymlink"/>
 
     <variablelist class="dbus-property" generated="True" extra-ref="LogsDirectoryMode"/>
 
+    <variablelist class="dbus-property" generated="True" extra-ref="LogsDirectoryAccounting"/>
+
+    <variablelist class="dbus-property" generated="True" extra-ref="LogsDirectoryQuota"/>
+
     <variablelist class="dbus-property" generated="True" extra-ref="LogsDirectory"/>
 
     <variablelist class="dbus-property" generated="True" extra-ref="ConfigurationDirectoryMode"/>
@@ -8607,6 +8763,12 @@ node /org/freedesktop/systemd1/unit/home_2emount {
 
     <variablelist class="dbus-property" generated="True" extra-ref="ExtensionImagePolicy"/>
 
+    <variablelist class="dbus-property" generated="True" extra-ref="StateDirectoryQuotaUsage"/>
+
+    <variablelist class="dbus-property" generated="True" extra-ref="CacheDirectoryQuotaUsage"/>
+
+    <variablelist class="dbus-property" generated="True" extra-ref="LogsDirectoryQuotaUsage"/>
+
     <variablelist class="dbus-property" generated="True" extra-ref="KillMode"/>
 
     <variablelist class="dbus-property" generated="True" extra-ref="KillSignal"/>
@@ -9364,18 +9526,30 @@ node /org/freedesktop/systemd1/unit/dev_2dsda3_2eswap {
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly u StateDirectoryMode = ...;
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
+      readonly b StateDirectoryAccounting = ...;
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
+      readonly (tus) StateDirectoryQuota = ...;
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly as StateDirectory = ['...', ...];
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly a(sst) CacheDirectorySymlink = [...];
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly u CacheDirectoryMode = ...;
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
+      readonly b CacheDirectoryAccounting = ...;
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
+      readonly (tus) CacheDirectoryQuota = ...;
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly as CacheDirectory = ['...', ...];
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly a(sst) LogsDirectorySymlink = [...];
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly u LogsDirectoryMode = ...;
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
+      readonly b LogsDirectoryAccounting = ...;
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
+      readonly (tus) LogsDirectoryQuota = ...;
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly as LogsDirectory = ['...', ...];
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly u ConfigurationDirectoryMode = ...;
@@ -9427,6 +9601,12 @@ node /org/freedesktop/systemd1/unit/dev_2dsda3_2eswap {
       readonly s MountImagePolicy = '...';
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly s ExtensionImagePolicy = '...';
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
+      readonly (tt) StateDirectoryQuotaUsage = ...;
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
+      readonly (tt) CacheDirectoryQuotaUsage = ...;
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
+      readonly (tt) LogsDirectoryQuotaUsage = ...;
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
       readonly s KillMode = '...';
       @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
@@ -9885,10 +10065,22 @@ node /org/freedesktop/systemd1/unit/dev_2dsda3_2eswap {
 
     <!--property StateDirectoryMode is not documented!-->
 
+    <!--property StateDirectoryAccounting is not documented!-->
+
+    <!--property StateDirectoryQuota is not documented!-->
+
     <!--property CacheDirectoryMode is not documented!-->
 
+    <!--property CacheDirectoryAccounting is not documented!-->
+
+    <!--property CacheDirectoryQuota is not documented!-->
+
     <!--property LogsDirectoryMode is not documented!-->
 
+    <!--property LogsDirectoryAccounting is not documented!-->
+
+    <!--property LogsDirectoryQuota is not documented!-->
+
     <!--property ConfigurationDirectoryMode is not documented!-->
 
     <!--property ConfigurationDirectory is not documented!-->
@@ -9935,6 +10127,12 @@ node /org/freedesktop/systemd1/unit/dev_2dsda3_2eswap {
 
     <!--property ExtensionImagePolicy is not documented!-->
 
+    <!--property StateDirectoryQuotaUsage is not documented!-->
+
+    <!--property CacheDirectoryQuotaUsage is not documented!-->
+
+    <!--property LogsDirectoryQuotaUsage is not documented!-->
+
     <!--property KillMode is not documented!-->
 
     <!--property KillSignal is not documented!-->
@@ -10449,18 +10647,30 @@ node /org/freedesktop/systemd1/unit/dev_2dsda3_2eswap {
 
     <variablelist class="dbus-property" generated="True" extra-ref="StateDirectoryMode"/>
 
+    <variablelist class="dbus-property" generated="True" extra-ref="StateDirectoryAccounting"/>
+
+    <variablelist class="dbus-property" generated="True" extra-ref="StateDirectoryQuota"/>
+
     <variablelist class="dbus-property" generated="True" extra-ref="StateDirectory"/>
 
     <variablelist class="dbus-property" generated="True" extra-ref="CacheDirectorySymlink"/>
 
     <variablelist class="dbus-property" generated="True" extra-ref="CacheDirectoryMode"/>
 
+    <variablelist class="dbus-property" generated="True" extra-ref="CacheDirectoryAccounting"/>
+
+    <variablelist class="dbus-property" generated="True" extra-ref="CacheDirectoryQuota"/>
+
     <variablelist class="dbus-property" generated="True" extra-ref="CacheDirectory"/>
 
     <variablelist class="dbus-property" generated="True" extra-ref="LogsDirectorySymlink"/>
 
     <variablelist class="dbus-property" generated="True" extra-ref="LogsDirectoryMode"/>
 
+    <variablelist class="dbus-property" generated="True" extra-ref="LogsDirectoryAccounting"/>
+
+    <variablelist class="dbus-property" generated="True" extra-ref="LogsDirectoryQuota"/>
+
     <variablelist class="dbus-property" generated="True" extra-ref="LogsDirectory"/>
 
     <variablelist class="dbus-property" generated="True" extra-ref="ConfigurationDirectoryMode"/>
@@ -10513,6 +10723,12 @@ node /org/freedesktop/systemd1/unit/dev_2dsda3_2eswap {
 
     <variablelist class="dbus-property" generated="True" extra-ref="ExtensionImagePolicy"/>
 
+    <variablelist class="dbus-property" generated="True" extra-ref="StateDirectoryQuotaUsage"/>
+
+    <variablelist class="dbus-property" generated="True" extra-ref="CacheDirectoryQuotaUsage"/>
+
+    <variablelist class="dbus-property" generated="True" extra-ref="LogsDirectoryQuotaUsage"/>
+
     <variablelist class="dbus-property" generated="True" extra-ref="KillMode"/>
 
     <variablelist class="dbus-property" generated="True" extra-ref="KillSignal"/>
@@ -12076,8 +12292,17 @@ $ gdbus introspect --system --dest org.freedesktop.systemd1 \
       <varname>PrivateUsersEx</varname>, and
       <varname>PrivatePIDs</varname> were added in version 257.</para>
       <para><varname>ProtectHostnameEx</varname>,
-      <varname>DelegateNamespaces</varname>, and
+      <varname>DelegateNamespaces</varname>,
-      <function>RemoveSubGroup()</function> were added in version 258.</para>
+      <function>RemoveSubGroup()</function>,
+      <varname>StateDirectoryQuota</varname>,
+      <varname>StateDirectoryQuotaUsage</varname>,
+      <varname>StateDirectoryAccounting</varname>,
+      <varname>CacheDirectoryQuota</varname>,
+      <varname>CacheDirectoryQuotaUsage</varname>,
+      <varname>CacheDirectoryAccounting</varname>,
+      <varname>LogsDirectoryQuota</varname>,
+      <varname>LogsDirectoryQuotaUsage</varname>, and
+      <varname>LogsDirectoryAccounting</varname>, were added in version 258.</para>
     </refsect2>
     <refsect2>
       <title>Socket Unit Objects</title>
@@ -12126,8 +12351,17 @@ $ gdbus introspect --system --dest org.freedesktop.systemd1 \
       <varname>AcceptFileDescriptors</varname>,
       <varname>DelegateNamespaces</varname>,
       <function>RemoveSubgroup()</function>,
-      <varname>DeferTrigger</varname>, and
+      <varname>DeferTrigger</varname>,
-      <varname>DeferTriggerMaxUSec</varname> were added in version 258.</para>
+      <varname>DeferTriggerMaxUSec</varname>,
+      <varname>StateDirectoryQuota</varname>,
+      <varname>StateDirectoryQuotaUsage</varname>,
+      <varname>StateDirectoryAccounting</varname>,
+      <varname>CacheDirectoryQuota</varname>,
+      <varname>CacheDirectoryQuotaUsage</varname>,
+      <varname>CacheDirectoryAccounting</varname>,
+      <varname>LogsDirectoryQuota</varname>,
+      <varname>LogsDirectoryQuotaUsage</varname>, and
+      <varname>LogsDirectoryAccounting</varname>, were added in version 258.</para>
     </refsect2>
     <refsect2>
       <title>Mount Unit Objects</title>
@@ -12171,8 +12405,17 @@ $ gdbus introspect --system --dest org.freedesktop.systemd1 \
       <para><varname>ProtectHostnameEx</varname>,
       <varname>DelegateNamespaces</varname>,
       <function>RemoveSubgroup()</function>,
-      <varname>ReloadResult</varname>, and
+      <varname>ReloadResult</varname>,
-      <varname>CleanResult</varname> were added in version 258.</para>
+      <varname>CleanResult</varname>,
+      <varname>StateDirectoryQuota</varname>,
+      <varname>StateDirectoryQuotaUsage</varname>,
+      <varname>StateDirectoryAccounting</varname>,
+      <varname>CacheDirectoryQuota</varname>,
+      <varname>CacheDirectoryQuotaUsage</varname>,
+      <varname>CacheDirectoryAccounting</varname>,
+      <varname>LogsDirectoryQuota</varname>,
+      <varname>LogsDirectoryQuotaUsage</varname>, and
+      <varname>LogsDirectoryAccounting</varname>, were added in version 258.</para>
     </refsect2>
     <refsect2>
       <title>Swap Unit Objects</title>
@@ -12214,8 +12457,17 @@ $ gdbus introspect --system --dest org.freedesktop.systemd1 \
       <varname>ProtectControlGroupsEx</varname>, and
       <varname>PrivatePIDs</varname> were added in version 257.</para>
       <para><varname>ProtectHostnameEx</varname>,
-      <varname>DelegateNamespaces</varname>, and
+      <varname>DelegateNamespaces</varname>,
-      <function>RemoveSubgroup()</function> were added in version 258.</para>
+      <function>RemoveSubgroup()</function>,
+      <varname>StateDirectoryQuota</varname>,
+      <varname>StateDirectoryQuotaUsage</varname>,
+      <varname>StateDirectoryAccounting</varname>,
+      <varname>CacheDirectoryQuota</varname>,
+      <varname>CacheDirectoryQuotaUsage</varname>,
+      <varname>CacheDirectoryAccounting</varname>,
+      <varname>LogsDirectoryQuota</varname>,
+      <varname>LogsDirectoryQuotaUsage</varname>, and
+      <varname>LogsDirectoryAccounting</varname>, were added in version 258.</para>
     </refsect2>
     <refsect2>
       <title>Slice Unit Objects</title>

man/systemd.exec.xml

@@ -1680,6 +1680,46 @@ StateDirectory=aaa/bbb ccc</programlisting>
         <xi:include href="version-info.xml" xpointer="v234"/></listitem>
       </varlistentry>
 
+      <varlistentry>
+        <term><varname>StateDirectoryQuota=</varname></term>
+        <term><varname>CacheDirectoryQuota=</varname></term>
+        <term><varname>LogsDirectoryQuota=</varname></term>
+
+        <listitem><para>Specifies the storage limits for the directories specified in <varname>StateDirectory=</varname>,
+        <varname>CacheDirectory=</varname>, or <varname>LogsDirectory=</varname> respectively.</para>
+
+        <para>The storage quota is defined in terms of disk blocks and inodes, as per
+        <ulink url="https://man7.org/linux/man-pages/man2/quotactl.2.html">quotactl</ulink>. Takes an absolute size limit
+        in bytes. If the value is suffixed with K, M, G or T, the specified size is parsed as Kilobytes, Megabytes, Gigabytes,
+        or Terabytes (with the base 1024), respectively. If an absolute size limit is specified, only the block quota is set
+        (rounded up to the nearest block). Alternatively, a percentage value may be specified, which applies the same percent
+        quota to both blocks and inodes. Defaults to <constant>off</constant>, in which case no storage limits will be set.</para>
+
+        <para>Only hard limits are set, not soft limits. If the underlying filesystem for the specified directories does not
+        support project quotas, the specified storage limits will not be set. In addition to enabling per-unit quotas with
+        these settings, it is necessary to enable <constant>prjquota</constant> on the file system level as well
+        (i.e. <command>tune2fs -Q prjquota</command>). Quotas must also be turned on with
+        <ulink url="https://linux.die.net/man/8/quotaon">quotaon.</ulink></para>
+
+        <xi:include href="version-info.xml" xpointer="v258"/></listitem>
+      </varlistentry>
+
+      <varlistentry>
+        <term><varname>StateDirectoryAccounting=</varname></term>
+        <term><varname>CacheDirectoryAccounting=</varname></term>
+        <term><varname>LogsDirectoryAccounting=</varname></term>
+
+        <listitem><para>Takes a boolean argument. If true, a project ID is assigned to the directories specified in
+        <varname>StateDirectory=</varname>, <varname>CacheDirectory=</varname>, or <varname>LogsDirectory=</varname>
+        respectively, which is used for tracking disk usage when disk quotas are turned on
+        (see <ulink url="https://man7.org/linux/man-pages/man8/repquota.8.html">repquota</ulink>). Defaults to false.</para>
+
+        <para>To set and enforce disk quotas, <varname>StateDirectoryQuota=</varname>, <varname>CacheDirectoryQuota=</varname>,
+        or <varname>LogsDirectoryQuota=</varname> must be specified.</para>
+
+        <xi:include href="version-info.xml" xpointer="v258"/></listitem>
+      </varlistentry>
+
       <varlistentry>
         <term><varname>RuntimeDirectoryPreserve=</varname></term>
 

src/core/exec-invoke.c

@@ -10,6 +10,7 @@
 #include <sys/ioctl.h>
 #include <sys/mount.h>
 #include <sys/prctl.h>
+#include <sys/statvfs.h>
 #include <unistd.h>
 
 #if HAVE_PAM
@@ -30,6 +31,7 @@
 #include "cgroup-setup.h"
 #include "cgroup.h"
 #include "chase.h"
+#include "chattr-util.h"
 #include "chown-recursive.h"
 #include "constants.h"
 #include "copy.h"
@@ -60,15 +62,19 @@
 #include "open-file.h"
 #include "osc-context.h"
 #include "path-util.h"
+#include "percent-util.h"
 #include "pidref.h"
 #include "proc-cmdline.h"
 #include "process-util.h"
 #include "psi-util.h"
+#include "quota-util.h"
+#include "random-util.h"
 #include "rlimit-util.h"
 #include "seccomp-util.h"
 #include "selinux-util.h"
 #include "set.h"
 #include "signal-util.h"
+#include "siphash24.h"
 #include "smack-util.h"
 #include "socket-util.h"
 #include "stat-util.h"
@@ -84,6 +90,11 @@
 
 #define SNDBUF_SIZE (8*1024*1024)
 
+/* Project id range for disk quotas */
+#define PROJ_ID_MIN UINT32_C(2147483648)
+#define PROJ_ID_MAX UINT32_C(4294967294)
+#define PROJ_ID_CLAMP_INTO_QUOTA_RANGE(id) ((uint32_t) ((id) % (PROJ_ID_MAX - PROJ_ID_MIN + 1)) + PROJ_ID_MIN)
+
 static int flag_fds(
                 const int fds[],
                 size_t n_socket_fds,
@@ -2575,6 +2586,217 @@ static int create_many_symlinks(const char *root, const char *source, char **sym
         return 0;
 }
 
+static int set_exec_storage_quota(int fd, uint32_t proj_id, const QuotaLimit *ql) {
+        int r;
+        uint64_t block_limit = 0, inode_limit = 0;
+
+        assert(fd >= 0);
+        assert(ql);
+
+        if (ql->quota_absolute == 0 || ql->quota_scale == 0)
+                /* Limit of 0 means no usage is allowed. For quotactl, use 1 as the limit, since 0 means that
+                 * hard limits are disabled */
+                block_limit = inode_limit = 1;
+        else if (ql->quota_absolute == UINT64_MAX) {
+                _cleanup_close_ int fd_parent = -EBADF;
+
+                /* Use target_dir's parent when setting quotas. If a FD for target_dir has been previously
+                 * used for quotactl_fd(SET) and is passed again for fstatvfs(), the total number of blocks is not
+                 * reported accurately (instead, the block limit is reported as total blocks). Thus, use the FD
+                 * associated with the parent, so that total blocks is accurate */
+                fd_parent = openat(fd, "..", O_PATH|O_CLOEXEC|O_DIRECTORY);
+                if (fd_parent < 0)
+                        return -errno;
+
+                uint32_t xattr_flags = 0;
+                r = read_fs_xattr_fd(fd_parent, &xattr_flags, /* ret_projid = */ NULL);
+                if (r < 0)
+                        return r;
+                /* Refuse if parent has FS_XFLAG_PROJINHERIT since this will mean the total number of blocks will not
+                 * be reported accurately */
+                if (FLAGS_SET(xattr_flags, FS_XFLAG_PROJINHERIT))
+                        return -ENOMEDIUM;
+
+                struct statvfs disk_st;
+                if (fstatvfs(fd_parent, &disk_st) < 0)
+                        return -errno;
+
+                block_limit = (uint64_t) DIV_ROUND_UP((uint64_t)((double) (disk_st.f_frsize * disk_st.f_blocks) / UINT32_MAX * ql->quota_scale), QIF_DQBLKSIZE);
+                inode_limit = (uint64_t) ((double) disk_st.f_files / UINT32_MAX * ql->quota_scale);
+        } else
+                block_limit = (uint64_t) DIV_ROUND_UP(ql->quota_absolute, QIF_DQBLKSIZE);
+
+        struct dqblk req = {
+                .dqb_bhardlimit = block_limit,
+                .dqb_ihardlimit = inode_limit,
+                .dqb_valid = QIF_LIMITS,
+        };
+
+        r = quotactl_fd_with_fallback(fd, QCMD_FIXED(Q_SETQUOTA, PRJQUOTA), proj_id, &req);
+        if (r < 0)
+                return r;
+
+        log_debug("Storage quotas set for project id %" PRIu32 ". Block limit = %" PRIu64 ", inode limit = %" PRIu64, proj_id, block_limit, inode_limit);
+
+        return 0;
+}
+
+static int unset_exec_storage_quota(int fd, uint32_t proj_id, bool quota_accounting) {
+        int r, quota_supported;
+        struct dqblk req;
+
+        assert(fd >= 0);
+
+        quota_supported = quota_query_proj_id(fd, proj_id, &req);
+        if (quota_supported < 0)
+                return log_debug_errno(quota_supported, "Failed to query disk quota for project ID %" PRIu32 ": %m", proj_id);
+
+        /* Do not enforce quotas anymore */
+        if (quota_supported && FLAGS_SET(req.dqb_valid, QIF_BLIMITS) && (req.dqb_bhardlimit > 0 || req.dqb_ihardlimit > 0)) {
+                req.dqb_bhardlimit = 0, req.dqb_ihardlimit = 0;
+
+                r = quotactl_fd_with_fallback(fd, QCMD_FIXED(Q_SETQUOTA, PRJQUOTA), proj_id, &req);
+                if (r < 0)
+                        return log_debug_errno(r, "Failed to disable project quotas for project ID %" PRIu32 ": %m", proj_id);
+
+                log_debug("Storage quotas for project ID %" PRIu32 " were disabled", proj_id);
+        }
+
+        /* Release project ID if no accounting needed */
+        if (!quota_accounting) {
+                r = set_proj_id_recursive(fd, 0);
+                if (r < 0)
+                        log_warning_errno(r, "Failed to release project ID %" PRIu32 ", ignoring: %m", proj_id);
+        }
+
+        return 0;
+}
+
+static int apply_exec_quotas(
+                const char *target_dir,
+                const char *cgroup_path,
+                ExecDirectoryType type,
+                const QuotaLimit *ql,
+                uint32_t *exec_dt_proj_id, /* in/out */
+                bool *already_enforced) {  /* in/out */
+
+        _cleanup_close_ int fd = -EBADF;
+        int r, quota_supported = 0;
+
+        assert(target_dir);
+        assert(cgroup_path);
+        assert(ql);
+        assert(exec_dt_proj_id);
+        assert(already_enforced);
+
+        /* Do not apply to the Runtime directory since tmpfs does not support project IDs yet */
+        if (!IN_SET(type, EXEC_DIRECTORY_STATE, EXEC_DIRECTORY_CACHE, EXEC_DIRECTORY_LOGS))
+                return 0;
+
+        fd = open(target_dir, O_PATH|O_CLOEXEC|O_DIRECTORY);
+        if (fd < 0)
+                return log_debug_errno(errno, "Failed to open %s: %m", target_dir);
+
+        /* Get the project ID of the current directory */
+        uint32_t proj_id;
+        r = read_fs_xattr_fd(fd, /* ret_xflags = */ NULL, &proj_id);
+        if (ERRNO_IS_NEG_IOCTL_NOT_SUPPORTED(r)) {
+                log_debug_errno(r, "Not applying storage quotas. FS_IOC_FSGETXATTR not supported for %s: %m", target_dir);
+                return 0;
+        }
+        if (r < 0)
+                return log_debug_errno(r, "Failed to retrieve project ID for %s: %m", target_dir);
+
+        /* If the first directory of this ExecType already has a project ID, adopt it as the project ID for all dirs of this ExecType */
+        bool proj_id_exists = PROJ_ID_MIN <= proj_id && proj_id <= PROJ_ID_MAX;
+        if (proj_id_exists && *exec_dt_proj_id == 0)
+                *exec_dt_proj_id = proj_id;
+
+        /* Check if enforcement should be disabled. Do not release project ID if accounting is enabled */
+        if (!ql->quota_enforce) {
+                if (proj_id_exists) {
+                        r = unset_exec_storage_quota(fd, proj_id, ql->quota_accounting);
+                        if (r < 0)
+                                return log_debug_errno(r, "Failed to unset project quotas for %s: %m", target_dir);
+                }
+
+                if (!ql->quota_accounting)
+                        return 0;
+        }
+
+        if (*exec_dt_proj_id > 0 && *exec_dt_proj_id != proj_id) {
+                /* Set the existing project ID only if the current directory's ID does not exist or does not match */
+                proj_id = *exec_dt_proj_id;
+                r = quota_proj_id_set_recursive(fd, proj_id, false);
+                if (r < 0)
+                        return log_debug_errno(r, "Failed to set project ID for %s: %m", target_dir);
+        } else if (*exec_dt_proj_id == 0) {
+                /* Only generate a new project ID if it's the first directory of this ExecType to be processed and does not have an existing ID */
+                static const sd_id128_t k = SD_ID128_ARRAY(e1,4a,79,9b,64,40,41,4a,a8,46,c2,f3,f9,19,4f,01);
+                _cleanup_free_ char *proj_id_plain = NULL;
+
+                /* Generate candidate project id */
+                proj_id_plain = strjoin(cgroup_path, "|", exec_directory_type_to_string(type));
+                if (!proj_id_plain)
+                        return log_oom_debug();
+
+                struct siphash state;
+                siphash24_init(&state, k.bytes);
+                siphash24_compress_string(proj_id_plain, &state);
+                proj_id = PROJ_ID_CLAMP_INTO_QUOTA_RANGE(siphash24_finalize(&state));
+
+#define MAX_PROJ_ID_RETRIES 10
+                for (unsigned attempt = 0;; attempt++) {
+                        if (attempt >= MAX_PROJ_ID_RETRIES)
+                                return log_debug_errno(SYNTHETIC_ERRNO(EBUSY), "Failed to generate unique project ID for %s: %m", target_dir);
+
+                        /* Check if project quotas are supported */
+                        struct dqblk req;
+                        quota_supported = quota_query_proj_id(fd, proj_id, &req);
+                        if (quota_supported < 0)
+                                return log_debug_errno(quota_supported, "Failed to query disk quota for project ID %" PRIu32 ": %m", proj_id);
+                        if (!quota_supported) {
+                                log_debug("Not applying storage quotas. Project quotas are not supported for %s", target_dir);
+                                return 0;
+                        }
+
+                        if (!quota_dqblk_is_populated(&req)) {
+                                int proj_id_was_set = quota_proj_id_set_recursive(fd, proj_id, true);
+                                if (proj_id_was_set < 0)
+                                        return log_debug_errno(proj_id_was_set, "Failed to set project ID for %s: %m", target_dir);
+                                if (proj_id_was_set) {
+                                        *exec_dt_proj_id = proj_id;
+                                        log_debug("Project ID %u generated for %s", proj_id, target_dir);
+                                        break;
+                                }
+                        }
+
+                        proj_id = (uint32_t) (random_u64_range(PROJ_ID_MAX - PROJ_ID_MIN + 1) + PROJ_ID_MIN);
+                }
+        }
+
+        if (ql->quota_enforce && !*already_enforced) {
+                if (!quota_supported) {
+                        struct dqblk req;
+                        quota_supported = quota_query_proj_id(fd, proj_id, &req);
+                        if (quota_supported < 0)
+                                return log_debug_errno(quota_supported, "Failed to query disk quota for project ID %" PRIu32 ": %m", proj_id);
+                        if (!quota_supported) {
+                                log_debug("Not applying storage quotas. Project quotas are not supported for %s", target_dir);
+                                return 0;
+                        }
+                }
+
+                r = set_exec_storage_quota(fd, proj_id, ql);
+                if (r < 0)
+                        return log_debug_errno(r, "Failed to set storage quotas for %s: %m", target_dir);
+
+                *already_enforced = true;
+        }
+
+        return r;
+}
+
 static int setup_exec_directory(
                 const ExecContext *context,
                 const ExecParameters *params,
@@ -2608,6 +2830,9 @@ static int setup_exec_directory(
                         gid = 0;
         }
 
+        uint32_t exec_dt_proj_id = 0;
+        bool quota_already_enforced = false;
+
         FOREACH_ARRAY(i, context->directories[type].items, context->directories[type].n_items) {
                 _cleanup_free_ char *p = NULL, *pp = NULL;
 
@@ -2898,6 +3123,11 @@ static int setup_exec_directory(
                         if (r < 0)
                                 goto fail;
                 }
+
+                /* Apply storage quotas and accounting */
+                r = apply_exec_quotas(target_dir, params->cgroup_path, type, &context->directories[type].exec_quota, &exec_dt_proj_id, &quota_already_enforced);
+                if (r < 0)
+                        goto fail;
         }
 
         /* If we are not going to run in a namespace, set up the symlinks - otherwise

src/core/execute-serialize.c

@@ -1848,6 +1848,28 @@ static int exec_context_serialize(const ExecContext *c, FILE *f) {
                 r = serialize_item(f, key, value);
                 if (r < 0)
                         return r;
+
+                if (c->directories[dt].exec_quota.quota_enforce) {
+                        _cleanup_free_ char *key_quota = NULL;
+                        key_quota = strjoin("exec-context-quota-directories-", exec_directory_type_to_string(dt));
+                        if (!key_quota)
+                                return log_oom_debug();
+
+                        r = serialize_item_format(f, key_quota, "%" PRIu64 " %" PRIu32, c->directories[dt].exec_quota.quota_absolute,
+                                                                                        c->directories[dt].exec_quota.quota_scale);
+                        if (r < 0)
+                                return r;
+
+                } else if (c->directories[dt].exec_quota.quota_accounting) {
+                        _cleanup_free_ char *key_quota = NULL;
+                        key_quota = strjoin("exec-context-quota-accounting-directories-", exec_directory_type_to_string(dt));
+                        if (!key_quota)
+                                return log_oom_debug();
+
+                        r = serialize_bool(f, key_quota, c->directories[dt].exec_quota.quota_accounting);
+                        if (r < 0)
+                                return r;
+                }
         }
 
         r = serialize_usec(f, "exec-context-timeout-clean-usec", c->timeout_clean_usec);
@@ -2735,7 +2757,7 @@ static int exec_context_deserialize(ExecContext *c, FILE *f) {
 
                         dt = exec_directory_type_from_string(type);
                         if (dt < 0)
-                                return -EINVAL;
+                                return dt;
 
                         r = parse_mode(mode, &c->directories[dt].mode);
                         if (r < 0)
@@ -2793,6 +2815,48 @@ static int exec_context_deserialize(ExecContext *c, FILE *f) {
                                                 return r;
                                 }
                         }
+                } else if ((val = startswith(l, "exec-context-quota-accounting-directories-"))) {
+                        _cleanup_free_ char *type = NULL, *quota_accounting = NULL;
+                        ExecDirectoryType dt;
+
+                        r = split_pair(val, "=", &type, &quota_accounting);
+                        if (r < 0)
+                                return r;
+
+                        dt = exec_directory_type_from_string(type);
+                        if (dt < 0)
+                                return dt;
+
+                        r = parse_boolean(quota_accounting);
+                        if (r < 0)
+                                return r;
+
+                        c->directories[dt].exec_quota.quota_accounting = r;
+                } else if ((val = startswith(l, "exec-context-quota-directories-"))) {
+                        _cleanup_free_ char *type = NULL, *quota_info = NULL, *quota_absolute = NULL, *quota_scale = NULL;
+                        ExecDirectoryType dt;
+
+                        r = split_pair(val, "=", &type, &quota_info);
+                        if (r < 0)
+                                return r;
+
+                        r = split_pair(quota_info, " ", &quota_absolute, &quota_scale);
+                        if (r < 0)
+                                return r;
+
+                        dt = exec_directory_type_from_string(type);
+                        if (dt < 0)
+                                return dt;
+
+                        r = safe_atou64(quota_absolute, &c->directories[dt].exec_quota.quota_absolute);
+                        if (r < 0)
+                               return r;
+
+                        r = safe_atou32(quota_scale, &c->directories[dt].exec_quota.quota_scale);
+                        if (r < 0)
+                               return r;
+
+                        c->directories[dt].exec_quota.quota_enforce = true;
                 } else if ((val = startswith(l, "exec-context-timeout-clean-usec="))) {
                         r = deserialize_usec(val, &c->timeout_clean_usec);
                         if (r < 0)

src/core/load-fragment-gperf.gperf.in

@@ -145,10 +145,16 @@
 {{type}}.RuntimeDirectoryMode,                config_parse_mode,                                  0,                                  offsetof({{type}}, exec_context.directories[EXEC_DIRECTORY_RUNTIME].mode)
 {{type}}.RuntimeDirectory,                    config_parse_exec_directories,                      0,                                  offsetof({{type}}, exec_context.directories[EXEC_DIRECTORY_RUNTIME])
 {{type}}.StateDirectoryMode,                  config_parse_mode,                                  0,                                  offsetof({{type}}, exec_context.directories[EXEC_DIRECTORY_STATE].mode)
+{{type}}.StateDirectoryAccounting,            config_parse_bool,                                  0,                                  offsetof({{type}}, exec_context.directories[EXEC_DIRECTORY_STATE].exec_quota.quota_accounting)
+{{type}}.StateDirectoryQuota,                 config_parse_exec_quota,                            0,                                  offsetof({{type}}, exec_context.directories[EXEC_DIRECTORY_STATE].exec_quota)
 {{type}}.StateDirectory,                      config_parse_exec_directories,                      0,                                  offsetof({{type}}, exec_context.directories[EXEC_DIRECTORY_STATE])
 {{type}}.CacheDirectoryMode,                  config_parse_mode,                                  0,                                  offsetof({{type}}, exec_context.directories[EXEC_DIRECTORY_CACHE].mode)
+{{type}}.CacheDirectoryAccounting,            config_parse_bool,                                  0,                                  offsetof({{type}}, exec_context.directories[EXEC_DIRECTORY_CACHE].exec_quota.quota_accounting)
+{{type}}.CacheDirectoryQuota,                 config_parse_exec_quota,                            0,                                  offsetof({{type}}, exec_context.directories[EXEC_DIRECTORY_CACHE].exec_quota)
 {{type}}.CacheDirectory,                      config_parse_exec_directories,                      0,                                  offsetof({{type}}, exec_context.directories[EXEC_DIRECTORY_CACHE])
 {{type}}.LogsDirectoryMode,                   config_parse_mode,                                  0,                                  offsetof({{type}}, exec_context.directories[EXEC_DIRECTORY_LOGS].mode)
+{{type}}.LogsDirectoryAccounting,             config_parse_bool,                                  0,                                  offsetof({{type}}, exec_context.directories[EXEC_DIRECTORY_LOGS].exec_quota.quota_accounting)
+{{type}}.LogsDirectoryQuota,                  config_parse_exec_quota,                            0,                                  offsetof({{type}}, exec_context.directories[EXEC_DIRECTORY_LOGS].exec_quota)
 {{type}}.LogsDirectory,                       config_parse_exec_directories,                      0,                                  offsetof({{type}}, exec_context.directories[EXEC_DIRECTORY_LOGS])
 {{type}}.ConfigurationDirectoryMode,          config_parse_mode,                                  0,                                  offsetof({{type}}, exec_context.directories[EXEC_DIRECTORY_CONFIGURATION].mode)
 {{type}}.ConfigurationDirectory,              config_parse_exec_directories,                      0,                                  offsetof({{type}}, exec_context.directories[EXEC_DIRECTORY_CONFIGURATION])

src/core/load-fragment.c

@@ -4602,6 +4602,48 @@ int config_parse_exec_directories(
         }
 }
 
+int config_parse_exec_quota(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        QuotaLimit *quota_limit = ASSERT_PTR(data);
+        uint64_t quota_absolute = UINT64_MAX;
+        uint32_t quota_scale = UINT32_MAX;
+        int r;
+
+        if (isempty(rvalue) || streq(rvalue, "off")) {
+                quota_limit->quota_enforce = false;
+                quota_limit->quota_absolute = UINT64_MAX;
+                quota_limit->quota_scale = UINT32_MAX;
+                return 0;
+        }
+
+        r = parse_permyriad(rvalue);
+        if (r < 0) {
+                r = parse_size(rvalue, 1024, &quota_absolute);
+                if (r < 0) {
+                        log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse disk quota value, ignoring: %s", rvalue);
+                        return 0;
+                }
+        } else
+                /* Normalize to 2^32-1 == 100% */
+                quota_scale = UINT32_SCALE_FROM_PERMYRIAD(r);
+
+        quota_limit->quota_absolute = quota_absolute;
+        quota_limit->quota_scale = quota_scale;
+        quota_limit->quota_enforce = true;
+
+        return 0;
+}
+
 int config_parse_set_credential(
                 const char *unit,
                 const char *filename,

src/core/load-fragment.h

@@ -101,6 +101,7 @@ CONFIG_PARSER_PROTOTYPE(config_parse_exec_smack_process_label);
 CONFIG_PARSER_PROTOTYPE(config_parse_address_families);
 CONFIG_PARSER_PROTOTYPE(config_parse_exec_preserve_mode);
 CONFIG_PARSER_PROTOTYPE(config_parse_exec_directories);
+CONFIG_PARSER_PROTOTYPE(config_parse_exec_quota);
 CONFIG_PARSER_PROTOTYPE(config_parse_set_credential);
 CONFIG_PARSER_PROTOTYPE(config_parse_load_credential);
 CONFIG_PARSER_PROTOTYPE(config_parse_import_credential);