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authorLennart Poettering <lennart@poettering.net>2013-01-12 04:24:12 +0100
committerLennart Poettering <lennart@poettering.net>2013-01-14 21:24:57 +0100
commit246aa6dd9dcea84bb945d16ec86e69f869dbb9b4 (patch)
tree375b4ff2acb7f18461a7f1c44167575fa58e8a97 /src/systemctl
parent748ebafa7a10d4e1f168dd8ae0193124cdf4226e (diff)
core: add bus API and systemctl commands for altering cgroup parameters during runtime
Diffstat (limited to 'src/systemctl')
-rw-r--r--src/systemctl/systemctl.c114
1 files changed, 114 insertions, 0 deletions
diff --git a/src/systemctl/systemctl.c b/src/systemctl/systemctl.c
index 91467cc085..075ee4b752 100644
--- a/src/systemctl/systemctl.c
+++ b/src/systemctl/systemctl.c
@@ -2025,6 +2025,110 @@ static int kill_unit(DBusConnection *bus, char **args) {
return 0;
}
+static int set_cgroup(DBusConnection *bus, char **args) {
+ _cleanup_dbus_message_unref_ DBusMessage *m = NULL, *reply = NULL;
+ DBusError error;
+ const char *method;
+ DBusMessageIter iter;
+ int r;
+ _cleanup_free_ char *n = NULL;
+
+ assert(bus);
+ assert(args);
+
+ dbus_error_init(&error);
+
+ method =
+ streq(args[0], "set-cgroup") ? "SetUnitControlGroups" :
+ streq(args[0], "unset-group") ? "UnsetUnitControlGroups"
+ : "UnsetUnitControlGroupAttributes";
+
+ n = unit_name_mangle(args[1]);
+ if (!n)
+ return log_oom();
+
+ m = dbus_message_new_method_call(
+ "org.freedesktop.systemd1",
+ "/org/freedesktop/systemd1",
+ "org.freedesktop.systemd1.Manager",
+ method);
+ if (!m)
+ return log_oom();
+
+ dbus_message_iter_init_append(m, &iter);
+ if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &n))
+ return log_oom();
+
+ r = bus_append_strv_iter(&iter, args + 2);
+ if (r < 0)
+ return log_oom();
+
+ reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error);
+ if (!reply) {
+ log_error("Failed to issue method call: %s", bus_error_message(&error));
+ dbus_error_free(&error);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int set_cgroup_attr(DBusConnection *bus, char **args) {
+ _cleanup_dbus_message_unref_ DBusMessage *m = NULL, *reply = NULL;
+ DBusError error;
+ DBusMessageIter iter, sub, sub2;
+ int r;
+ char **x, **y;
+ _cleanup_free_ char *n = NULL;
+
+ assert(bus);
+ assert(args);
+
+ dbus_error_init(&error);
+
+ if (strv_length(args) % 2 != 0) {
+ log_error("Expecting an uneven number of arguments!");
+ return -EINVAL;
+ }
+
+ n = unit_name_mangle(args[1]);
+ if (!n)
+ return log_oom();
+
+ m = dbus_message_new_method_call(
+ "org.freedesktop.systemd1",
+ "/org/freedesktop/systemd1",
+ "org.freedesktop.systemd1.Manager",
+ "SetUnitControlGroupAttributes");
+ if (!m)
+ return log_oom();
+
+ dbus_message_iter_init_append(m, &iter);
+ if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &n) ||
+ !dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(ss)", &sub))
+ return log_oom();
+
+ STRV_FOREACH_PAIR(x, y, args + 2) {
+ if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2) ||
+ !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, x) ||
+ !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, y) ||
+ !dbus_message_iter_close_container(&sub, &sub2))
+ return log_oom();
+ }
+
+ if (!dbus_message_iter_close_container(&iter, &sub))
+ return -ENOMEM;
+
+ reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error);
+ if (!reply) {
+ log_error("Failed to issue method call: %s", bus_error_message(&error));
+ dbus_error_free(&error);
+ return -EIO;
+ }
+
+ return 0;
+}
+
typedef struct ExecStatusInfo {
char *name;
@@ -4076,6 +4180,12 @@ static int systemctl_help(void) {
" help [NAME...|PID...] Show manual for one or more units\n"
" reset-failed [NAME...] Reset failed state for all, one, or more\n"
" units\n"
+ " set-cgroup [NAME] [CGROUP...] Add unit to a control group\n"
+ " unset-cgroup [NAME] [CGROUP...] Remove unit from a control group\n"
+ " set-cgroup-attr [NAME] [ATTR] [VALUE] ...\n"
+ " Set control group attribute\n"
+ " unset-cgroup-attr [NAME] [ATTR...]\n"
+ " Unset control group attribute\n"
" load [NAME...] Load one or more units\n\n"
"Unit File Commands:\n"
" list-unit-files List installed unit files\n"
@@ -5051,6 +5161,10 @@ static int systemctl_main(DBusConnection *bus, int argc, char *argv[], DBusError
{ "condreload", MORE, 2, start_unit }, /* For compatibility with ALTLinux */
{ "condrestart", MORE, 2, start_unit }, /* For compatibility with RH */
{ "isolate", EQUAL, 2, start_unit },
+ { "set-cgroup", MORE, 2, set_cgroup },
+ { "unset-cgroup", MORE, 2, set_cgroup },
+ { "set-cgroup-attr", MORE, 2, set_cgroup_attr },
+ { "unset-cgroup-attr", MORE, 2, set_cgroup },
{ "kill", MORE, 2, kill_unit },
{ "is-active", MORE, 2, check_unit_active },
{ "check", MORE, 2, check_unit_active },