Add support for nice, ioprio, oom-score-adj

build/Makefile

@@ -16,6 +16,8 @@ includes/mconfig.h: ../mconfig tools/mconfig-gen.cc version.conf
 		DEFAULT_STOP_TIMEOUT=$(DEFAULT_STOP_TIMEOUT) \
 		$(if $(SUPPORT_CGROUPS),SUPPORT_CGROUPS=$(SUPPORT_CGROUPS),) \
 		$(if $(SUPPORT_CAPABILITIES),SUPPORT_CAPABILITIES=$(SUPPORT_CAPABILITIES),) \
+		$(if $(SUPPORT_IOPRIO),SUPPORT_IOPRIO=$(SUPPORT_IOPRIO),) \
+		$(if $(SUPPORT_OOM_ADJ),SUPPORT_OOM_ADJ=$(SUPPORT_OOM_ADJ),) \
 		$(if $(USE_UTMPX),USE_UTMPX=$(USE_UTMPX),) \
 		$(if $(USE_INITGROUPS),USE_INITGROUPS=$(USE_INITGROUPS),) > includes/mconfig.h
 

build/mconfig.mesontemplate

@@ -9,6 +9,8 @@
 #mesondefine USE_INITGROUPS
 #mesondefine SUPPORT_CGROUPS
 #mesondefine SUPPORT_CAPABILITIES
+#mesondefine SUPPORT_IOPRIO
+#mesondefine SUPPORT_OOM_ADJ
 #mesondefine DEFAULT_AUTO_RESTART
 #mesondefine DEFAULT_START_TIMEOUT
 #mesondefine DEFAULT_STOP_TIMEOUT

build/tools/mconfig-gen.cc

@@ -80,6 +80,12 @@ int main(int argc, char **argv)
     if (vars.find("SUPPORT_CAPABILITIES") != vars.end()) {
         cout << "#define SUPPORT_CAPABILITIES " << vars["SUPPORT_CAPABILITIES"] << "\n";
     }
+    if (vars.find("SUPPORT_IOPRIO") != vars.end()) {
+        cout << "#define SUPPORT_IOPRIO " << vars["SUPPORT_IOPRIO"] << "\n";
+    }
+    if (vars.find("SUPPORT_OOM_ADJ") != vars.end()) {
+        cout << "#define SUPPORT_OOM_ADJ " << vars["SUPPORT_OOM_ADJ"] << "\n";
+    }
     if (vars.find("DEFAULT_AUTO_RESTART") != vars.end()) {
         cout << "#define DEFAULT_AUTO_RESTART " << vars["DEFAULT_AUTO_RESTART"] << "\n";
     }

configs/mconfig.Linux

@@ -39,6 +39,8 @@ TEST_LDFLAGS=$(TEST_LDFLAGS_BASE) $(TEST_CXXFLAGS)
 
 SUPPORT_CGROUPS=1
 SUPPORT_CAPABILITIES=1
+SUPPORT_IOPRIO=1
+SUPPORT_OOM_ADJ=1
 
 
 # Service defaults.

configs/mconfig.Linux.sh

@@ -112,6 +112,8 @@ FEATURE_SETTINGS=$(
   echo ""
   echo "SUPPORT_CGROUPS=1"
   echo "SUPPORT_CAPABILITIES=1"
+  echo "SUPPORT_IOPRIO=1"
+  echo "SUPPORT_OOM_ADJ=1"
 )
 
 SERVICE_DEFAULTS=$(

configure

@@ -209,6 +209,8 @@ for var in PREFIX \
            BUILD_SHUTDOWN \
            SUPPORT_CGROUPS \
            SUPPORT_CAPABILITIES \
+           SUPPORT_IOPRIO \
+           SUPPORT_OOM_ADJ \
            USE_UTMPX \
            USE_INITGROUPS \
            SYSCONTROLSOCKET \
@@ -242,6 +244,10 @@ for arg in "$@"; do
         --disable-cgroups|--enable-cgroups=no) SUPPORT_CGROUPS=0 ;;
         --enable-capabilities|--enable-capabilities=yes) SUPPORT_CAPABILITIES=1 ;;
         --disable-capabilities|--enable-capabilities=no) SUPPORT_CAPABILITIES=0 ;;
+        --enable-ioprio|--enable-ioprio=yes) SUPPORT_IOPRIO=1 ;;
+        --disable-ioprio|--enable-ioprio=no) SUPPORT_IOPRIO=0 ;;
+        --enable-oom-adj|--enable-oom-adj=yes) SUPPORT_OOM_ADJ=1 ;;
+        --disable-oom-adj|--enable-oom-adj=no) SUPPORT_OOM_ADJ=0 ;;
         --enable-utmpx|--enable-utmpx=yes) USE_UTMPX=1 ;;
         --disable-utmpx|--enable-utmpx=no) USE_UTMPX=0 ;;
         --enable-initgroups|--enable-initgroups=yes) USE_INITGROUPS=1 ;;
@@ -282,11 +288,15 @@ if [ "$PLATFORM" = "Linux" ]; then
     : "${BUILD_SHUTDOWN:="yes"}"
     : "${SUPPORT_CGROUPS:="1"}"
     : "${SUPPORT_CAPABILITIES:="1"}"
+    : "${SUPPORT_IOPRIO:="1"}"
+    : "${SUPPORT_OOM_ADJ:="1"}"
     : "${SYSCONTROLSOCKET:="/run/dinitctl"}"
 else
     : "${BUILD_SHUTDOWN:="no"}"
     : "${SUPPORT_CGROUPS:="0"}"
     : "${SUPPORT_CAPABILITIES:="0"}"
+    : "${SUPPORT_IOPRIO:="0"}"
+    : "${SUPPORT_OOM_ADJ:="0"}"
     : "${SYSCONTROLSOCKET:="/var/run/dinitctl"}"
 fi
 
@@ -473,6 +483,8 @@ STRIPOPTS=$STRIPOPTS
 SUPPORT_CGROUPS=$SUPPORT_CGROUPS
 USE_INITGROUPS=$USE_INITGROUPS
 SUPPORT_CAPABILITIES=$SUPPORT_CAPABILITIES
+SUPPORT_IOPRIO=$SUPPORT_IOPRIO
+SUPPORT_OOM_ADJ=$SUPPORT_OOM_ADJ
 
 # Optional settings
 SHUTDOWN_PREFIX=${SHUTDOWN_PREFIX:-}

doc/manpages/dinit-service.5.m4

@@ -541,6 +541,12 @@ See the \fBRESOURCE LIMITS\fR section.
 Note that some operating systems (notably, OpenBSD) do not support this limit; the
 setting will be ignored on such systems.
 .TP
+\fBnice\fR = \fInice-value\fR
+Specifies the CPU priority of the process.
+When the given value is out of range for the operating system, it will be clamped to
+supported range, but no error will be issued.
+On Linux, this also sets the autogroup priority, assuming procfs is mounted.
+.TP
 \fBrun\-in\-cgroup\fR = \fIcgroup-path\fR
 Run the service process(es) in the specified cgroup (see \fBcgroups\fR(7)).
 The cgroup is specified as a path; if it has a leading slash, the remainder of the path is
@@ -580,6 +586,23 @@ The append form can be used to add more secure bits, with everything being ORed
 at the end and used as an integer.
 .IP
 This setting is only available if \fBdinit\fR was built with capabilities support.
+.TP
+\fBioprio\fR = \fIioprio-value\fR
+Specifies the I/O priority class and value for the process.
+The permitted values are \fInone\fR, \fIidle\fR, \fIrealtime:PRIO\fR, and
+\fIbest-effort:PRIO\fR, where \fIPRIO\fR is an integer value no less than 0
+and no more than 7.
+.IP
+This setting is only available if \fBdinit\fR was built with ioprio support.
+.TP
+\fBoom-score-adj\fR = \fIadj-value\fR
+Specifies the OOM killer score adjustment for the service.
+The value is an integer no less than -1000 and no more than 1000.
+.IP
+This setting is only available if \fBdinit\fR was built with OOM score adjustment support.
+.IP
+This setting requires the proc filesystem to be mounted, and will result in a
+service startup failure if that is not the case.
 .\"
 .SS OPTIONS
 .\"

meson.build

@@ -32,6 +32,8 @@ fuzzer = get_option('fuzzer')
 man_pages = get_option('man-pages')
 support_cgroups = get_option('support-cgroups')
 support_capabilities = get_option('support-capabilities')
+support_ioprio = get_option('support-ioprio')
+support_oom_adj = get_option('support-oom-adj')
 use_utmpx = get_option('use-utmpx')
 use_initgroups = get_option('use-initgroups')
 default_auto_restart = get_option('default-auto-restart')
@@ -71,6 +73,8 @@ mconfig_data.set('DEFAULT_STOP_TIMEOUT', default_stop_timeout)
 mconfig_data.set10('USE_INITGROUPS', use_initgroups)
 mconfig_data.set10('SUPPORT_CGROUPS', support_cgroups.auto() and platform == 'linux' or support_cgroups.enabled())
 mconfig_data.set10('SUPPORT_CAPABILITIES', libcap_dep.found() and not support_capabilities.disabled())
+mconfig_data.set10('SUPPORT_IOPRIO', support_ioprio.auto() and platform == 'linux' or support_ioprio.enabled())
+mconfig_data.set10('SUPPORT_OOM_ADJ', support_oom_adj.auto() and platform == 'linux' or support_oom_adj.enabled())
 if use_utmpx.enabled() or (use_utmpx.auto() and compiler.has_header_symbol('utmpx.h', '_PATH_UTMPX') and
         compiler.has_header_symbol('utmpx.h', '_PATH_WTMPX'))
     mconfig_data.set('USE_UTMPX', '1')

meson_options.txt

@@ -91,6 +91,18 @@ option(
     value : 'auto',
     description : 'Enable capabilities support.'
 )
+option(
+    'support-ioprio',
+    type : 'feature',
+    value : 'auto',
+    description : 'Enable ioprio support.'
+)
+option(
+    'support-oom-adj',
+    type : 'feature',
+    value : 'auto',
+    description : 'Enable OOM score adjustment support.'
+)
 option(
     'build-shutdown',
     type : 'feature',

src/baseproc-service.cc

@@ -257,6 +257,8 @@ bool base_process_service::start_ps_process(const std::vector<const char *> &cmd
             run_params.env_file = env_file.c_str();
             run_params.output_fd = log_output_fd;
             run_params.input_fd = input_fd;
+            run_params.nice_is_set = nice_is_set;
+            run_params.nice = nice;
             #if SUPPORT_CGROUPS
             run_params.run_in_cgroup = run_in_cgroup.c_str();
             #endif
@@ -265,6 +267,13 @@ bool base_process_service::start_ps_process(const std::vector<const char *> &cmd
             run_params.secbits = secbits;
             run_params.no_new_privs = onstart_flags.no_new_privs;
             #endif
+            #if SUPPORT_IOPRIO
+            run_params.ioprio = ioprio;
+            #endif
+            #if SUPPORT_OOM_ADJ
+            run_params.oom_adj_is_set = oom_adj_is_set;
+            run_params.oom_adj = oom_adj;
+            #endif
             run_child_proc(run_params);
         }
         else {

src/includes/load-service.h

@@ -266,7 +266,7 @@ enum class setting_id_t {
     LOGFILE_GID, LOG_TYPE, LOG_BUFFER_SIZE, CONSUMER_OF, RESTART, SMOOTH_RECOVERY, OPTIONS,
     LOAD_OPTIONS, TERM_SIGNAL, TERMSIGNAL /* deprecated */, RESTART_LIMIT_INTERVAL, RESTART_DELAY,
     RESTART_LIMIT_COUNT, STOP_TIMEOUT, START_TIMEOUT, RUN_AS, CHAIN_TO, READY_NOTIFICATION,
-    INITTAB_ID, INITTAB_LINE,
+    INITTAB_ID, INITTAB_LINE, NICE,
     // Prefixed with SETTING_ to avoid name collision with system macros:
     SETTING_RLIMIT_NOFILE, SETTING_RLIMIT_CORE, SETTING_RLIMIT_DATA, SETTING_RLIMIT_ADDRSPACE,
     // Possibly unsupported depending on platform/build options:
@@ -277,6 +277,12 @@ enum class setting_id_t {
     CAPABILITIES,
     SECURE_BITS,
 #endif
+#if SUPPORT_IOPRIO
+    IOPRIO,
+#endif
+#if SUPPORT_OOM_ADJ
+    OOM_SCORE_ADJ,
+#endif
 };
 
 struct setting_details {
@@ -840,6 +846,30 @@ inline unsigned long long parse_unum_param(file_pos_ref input_pos, const std::st
     }
 }
 
+// Parse a signed numeric parameter value
+inline long long parse_snum_param(file_pos_ref input_pos, const std::string &param,
+        const std::string &service_name, long long min = std::numeric_limits<long long>::min(),
+        long long max = std::numeric_limits<long long>::max())
+{
+    const char * num_err_msg = "specified value contains invalid numeric characters or is outside "
+            "allowed range.";
+
+    std::size_t ind = 0;
+    try {
+        long long v = std::stoll(param, &ind, 0);
+        if (v < min || v > max || ind != param.length()) {
+            throw service_description_exc(service_name, num_err_msg, input_pos);
+        }
+        return v;
+    }
+    catch (std::out_of_range &exc) {
+        throw service_description_exc(service_name, num_err_msg, input_pos);
+    }
+    catch (std::invalid_argument &exc) {
+        throw service_description_exc(service_name, num_err_msg, input_pos);
+    }
+}
+
 // In a vector, find or create rlimits for a particular resource type.
 inline service_rlimits &find_rlimits(std::vector<service_rlimits> &all_rlimits, int resource_id)
 {
@@ -1373,6 +1403,9 @@ class service_settings_wrapper
     gid_t run_as_uid_gid = -1; // primary group of "run as" uid if known
     gid_t run_as_gid = -1;
 
+    bool nice_is_set = false;
+    int nice;
+
     string chain_to_name;
     string consumer_of_name;
 
@@ -1385,6 +1418,15 @@ class service_settings_wrapper
     secure_bits_t secbits;
     #endif
 
+    #if SUPPORT_IOPRIO
+    int ioprio = -1;
+    #endif
+
+    #if SUPPORT_OOM_ADJ
+    bool oom_adj_is_set = false;
+    short oom_adj = 0;
+    #endif
+
     #if USE_UTMPX
     char inittab_id[sizeof(utmpx().ut_id)] = {0};
     char inittab_line[sizeof(utmpx().ut_line)] = {0};
@@ -1467,6 +1509,19 @@ class service_settings_wrapper
             if (log_type != log_type_id::NONE) {
                 report_lint("option 'log_type' was specified, but ignored for the specified (or default) service type.");
             }
+            if (nice_is_set) {
+                report_lint("option 'nice' was specified, but ignored for the specified (or default) service type.");
+            }
+            #if SUPPORT_IOPRIO
+            if (ioprio >= 0) {
+                report_lint("option 'ioprio' was specified, but ignored for the specified (or default) service type.");
+            }
+            #endif
+            #if SUPPORT_OOM_ADJ
+            if (oom_adj_is_set) {
+                report_lint("option 'oom-score-adj' was specified, but ignored for the specified (or default) service type.");
+            }
+            #endif
         }
 
         if (do_report_lint) {
@@ -1650,6 +1705,48 @@ void process_service_line(settings_wrapper &settings, const char *name, const ch
             break;
         }
         #endif
+        case setting_id_t::NICE:
+        {
+            string nice_str = read_setting_value(input_pos, i, end);
+            settings.nice_is_set = true;
+            settings.nice = (int)parse_snum_param(input_pos, nice_str, name,
+                    std::numeric_limits<int>::min() / 2, std::numeric_limits<int>::max() / 2);
+            break;
+        }
+        #if SUPPORT_IOPRIO
+        case setting_id_t::IOPRIO:
+        {
+            string ioprio_str = read_setting_value(input_pos, i, end);
+            if (ioprio_str == "none") {
+                settings.ioprio = 0;
+            }
+            else if (starts_with(ioprio_str, "realtime:")) {
+                auto nval = parse_unum_param(input_pos, ioprio_str.substr(9 /* len 'realtime:' */), name, 7);
+                settings.ioprio = (1 << 13) | nval;
+            }
+            else if (starts_with(ioprio_str, "best-effort:")) {
+                auto nval = parse_unum_param(input_pos, ioprio_str.substr(12 /* len 'best-effort:' */), name, 7);
+                settings.ioprio = (2 << 13) | nval;
+            }
+            else if (ioprio_str == "idle") {
+                settings.ioprio = 3 << 13;
+            }
+            else {
+                    throw service_description_exc(name, "invalid value for ioprio: " + ioprio_str,
+                            name, input_pos);
+            }
+            break;
+        }
+        #endif
+        #if SUPPORT_OOM_ADJ
+        case setting_id_t::OOM_SCORE_ADJ:
+        {
+            string oom_adj_str = read_setting_value(input_pos, i, end);
+            settings.oom_adj_is_set = true;
+            settings.oom_adj = (int)parse_snum_param(input_pos, oom_adj_str, name, -1000, 1000);
+            break;
+        }
+        #endif
         case setting_id_t::SOCKET_LISTEN:
             settings.socket_path = read_setting_value(input_pos, i, end, nullptr);
             break;