581 lines
18 KiB
C
581 lines
18 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <errno.h>
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#include "dbus.h"
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#include "log.h"
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#include "dbus-unit.h"
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#include "bus-errors.h"
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const char bus_unit_interface[] = BUS_UNIT_INTERFACE;
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#define INVALIDATING_PROPERTIES \
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"LoadState\0" \
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"ActiveState\0" \
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"SubState\0" \
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"InactiveExitTimestamp\0" \
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"ActiveEnterTimestamp\0" \
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"ActiveExitTimestamp\0" \
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"InactiveEnterTimestamp\0" \
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"Job\0" \
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"NeedDaemonReload\0" \
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"\0"
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int bus_unit_append_names(Manager *m, DBusMessageIter *i, const char *property, void *data) {
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char *t;
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Iterator j;
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DBusMessageIter sub;
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Unit *u = data;
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if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "s", &sub))
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return -ENOMEM;
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SET_FOREACH(t, u->meta.names, j)
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if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &t))
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return -ENOMEM;
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if (!dbus_message_iter_close_container(i, &sub))
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return -ENOMEM;
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return 0;
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}
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int bus_unit_append_following(Manager *m, DBusMessageIter *i, const char *property, void *data) {
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Unit *u = data, *f;
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const char *d;
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assert(m);
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assert(i);
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assert(property);
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assert(u);
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f = unit_following(u);
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d = f ? f->meta.id : "";
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if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &d))
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return -ENOMEM;
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return 0;
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}
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int bus_unit_append_dependencies(Manager *m, DBusMessageIter *i, const char *property, void *data) {
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Unit *u;
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Iterator j;
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DBusMessageIter sub;
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Set *s = data;
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if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "s", &sub))
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return -ENOMEM;
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SET_FOREACH(u, s, j)
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if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &u->meta.id))
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return -ENOMEM;
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if (!dbus_message_iter_close_container(i, &sub))
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return -ENOMEM;
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return 0;
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}
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int bus_unit_append_description(Manager *m, DBusMessageIter *i, const char *property, void *data) {
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Unit *u = data;
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const char *d;
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assert(m);
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assert(i);
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assert(property);
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assert(u);
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d = unit_description(u);
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if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &d))
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return -ENOMEM;
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return 0;
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}
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DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_unit_append_load_state, unit_load_state, UnitLoadState);
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int bus_unit_append_active_state(Manager *m, DBusMessageIter *i, const char *property, void *data) {
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Unit *u = data;
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const char *state;
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assert(m);
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assert(i);
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assert(property);
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assert(u);
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state = unit_active_state_to_string(unit_active_state(u));
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if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &state))
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return -ENOMEM;
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return 0;
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}
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int bus_unit_append_sub_state(Manager *m, DBusMessageIter *i, const char *property, void *data) {
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Unit *u = data;
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const char *state;
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assert(m);
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assert(i);
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assert(property);
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assert(u);
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state = unit_sub_state_to_string(u);
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if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &state))
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return -ENOMEM;
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return 0;
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}
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int bus_unit_append_can_start(Manager *m, DBusMessageIter *i, const char *property, void *data) {
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Unit *u = data;
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dbus_bool_t b;
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assert(m);
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assert(i);
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assert(property);
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assert(u);
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b = unit_can_start(u) &&
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!u->meta.refuse_manual_start;
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if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b))
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return -ENOMEM;
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return 0;
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}
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int bus_unit_append_can_stop(Manager *m, DBusMessageIter *i, const char *property, void *data) {
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Unit *u = data;
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dbus_bool_t b;
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assert(m);
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assert(i);
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assert(property);
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assert(u);
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/* On the lower levels we assume that every unit we can start
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* we can also stop */
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b = unit_can_start(u) &&
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!u->meta.refuse_manual_stop;
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if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b))
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return -ENOMEM;
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return 0;
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}
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int bus_unit_append_can_reload(Manager *m, DBusMessageIter *i, const char *property, void *data) {
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Unit *u = data;
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dbus_bool_t b;
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assert(m);
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assert(i);
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assert(property);
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assert(u);
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b = unit_can_reload(u);
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if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b))
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return -ENOMEM;
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return 0;
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}
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int bus_unit_append_job(Manager *m, DBusMessageIter *i, const char *property, void *data) {
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Unit *u = data;
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DBusMessageIter sub;
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char *p;
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assert(m);
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assert(i);
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assert(property);
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assert(u);
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if (!dbus_message_iter_open_container(i, DBUS_TYPE_STRUCT, NULL, &sub))
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return -ENOMEM;
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if (u->meta.job) {
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if (!(p = job_dbus_path(u->meta.job)))
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return -ENOMEM;
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if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_UINT32, &u->meta.job->id) ||
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!dbus_message_iter_append_basic(&sub, DBUS_TYPE_OBJECT_PATH, &p)) {
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free(p);
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return -ENOMEM;
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}
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} else {
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uint32_t id = 0;
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/* No job, so let's fill in some placeholder
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* data. Since we need to fill in a valid path we
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* simple point to ourselves. */
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if (!(p = unit_dbus_path(u)))
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return -ENOMEM;
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if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_UINT32, &id) ||
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!dbus_message_iter_append_basic(&sub, DBUS_TYPE_OBJECT_PATH, &p)) {
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free(p);
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return -ENOMEM;
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}
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}
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free(p);
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if (!dbus_message_iter_close_container(i, &sub))
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return -ENOMEM;
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return 0;
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}
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int bus_unit_append_default_cgroup(Manager *m, DBusMessageIter *i, const char *property, void *data) {
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Unit *u = data;
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char *t;
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CGroupBonding *cgb;
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bool success;
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assert(m);
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assert(i);
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assert(property);
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assert(u);
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if ((cgb = unit_get_default_cgroup(u))) {
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if (!(t = cgroup_bonding_to_string(cgb)))
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return -ENOMEM;
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} else
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t = (char*) "";
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success = dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t);
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if (cgb)
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free(t);
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return success ? 0 : -ENOMEM;
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}
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int bus_unit_append_cgroups(Manager *m, DBusMessageIter *i, const char *property, void *data) {
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Unit *u = data;
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CGroupBonding *cgb;
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DBusMessageIter sub;
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if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "s", &sub))
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return -ENOMEM;
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LIST_FOREACH(by_unit, cgb, u->meta.cgroup_bondings) {
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char *t;
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bool success;
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if (!(t = cgroup_bonding_to_string(cgb)))
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return -ENOMEM;
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success = dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &t);
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free(t);
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if (!success)
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return -ENOMEM;
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}
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if (!dbus_message_iter_close_container(i, &sub))
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return -ENOMEM;
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return 0;
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}
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int bus_unit_append_need_daemon_reload(Manager *m, DBusMessageIter *i, const char *property, void *data) {
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Unit *u = data;
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dbus_bool_t b;
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assert(m);
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assert(i);
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assert(property);
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assert(u);
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b = unit_need_daemon_reload(u);
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if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b))
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return -ENOMEM;
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return 0;
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}
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static DBusHandlerResult bus_unit_message_dispatch(Unit *u, DBusConnection *connection, DBusMessage *message) {
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DBusMessage *reply = NULL;
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Manager *m = u->meta.manager;
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DBusError error;
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JobType job_type = _JOB_TYPE_INVALID;
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char *path = NULL;
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bool reload_if_possible = false;
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dbus_error_init(&error);
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if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Start"))
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job_type = JOB_START;
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else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Stop"))
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job_type = JOB_STOP;
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else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Reload"))
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job_type = JOB_RELOAD;
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else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Restart"))
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job_type = JOB_RESTART;
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else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "TryRestart"))
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job_type = JOB_TRY_RESTART;
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else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "ReloadOrRestart")) {
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reload_if_possible = true;
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job_type = JOB_RESTART;
|
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} else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "ReloadOrTryRestart")) {
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reload_if_possible = true;
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job_type = JOB_TRY_RESTART;
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} else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "ResetMaintenance")) {
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unit_reset_maintenance(u);
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if (!(reply = dbus_message_new_method_return(message)))
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goto oom;
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} else if (UNIT_VTABLE(u)->bus_message_handler)
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return UNIT_VTABLE(u)->bus_message_handler(u, connection, message);
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else
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return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
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|
|
|
if (job_type != _JOB_TYPE_INVALID) {
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|
const char *smode;
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|
JobMode mode;
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|
Job *j;
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|
int r;
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|
|
if ((job_type == JOB_START && u->meta.refuse_manual_start) ||
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(job_type == JOB_STOP && u->meta.refuse_manual_stop) ||
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((job_type == JOB_RESTART || job_type == JOB_TRY_RESTART) &&
|
|
(u->meta.refuse_manual_start || u->meta.refuse_manual_stop))) {
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|
dbus_set_error(&error, BUS_ERROR_ONLY_BY_DEPENDENCY, "Operation refused, may be requested by dependency only.");
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return bus_send_error_reply(m, connection, message, &error, -EPERM);
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|
}
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|
|
|
if (!dbus_message_get_args(
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message,
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|
&error,
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|
DBUS_TYPE_STRING, &smode,
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|
DBUS_TYPE_INVALID))
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|
return bus_send_error_reply(m, connection, message, &error, -EINVAL);
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|
|
|
if (reload_if_possible && unit_can_reload(u)) {
|
|
if (job_type == JOB_RESTART)
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|
job_type = JOB_RELOAD_OR_START;
|
|
else if (job_type == JOB_TRY_RESTART)
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|
job_type = JOB_RELOAD;
|
|
}
|
|
|
|
if ((mode = job_mode_from_string(smode)) == _JOB_MODE_INVALID) {
|
|
dbus_set_error(&error, BUS_ERROR_INVALID_JOB_MODE, "Job mode %s is invalid.", smode);
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|
return bus_send_error_reply(m, connection, message, &error, -EINVAL);
|
|
}
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|
|
|
if ((r = manager_add_job(m, job_type, u, mode, true, &error, &j)) < 0)
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|
return bus_send_error_reply(m, connection, message, &error, r);
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|
|
|
if (!(reply = dbus_message_new_method_return(message)))
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|
goto oom;
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|
|
|
if (!(path = job_dbus_path(j)))
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|
goto oom;
|
|
|
|
if (!dbus_message_append_args(
|
|
reply,
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|
DBUS_TYPE_OBJECT_PATH, &path,
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|
DBUS_TYPE_INVALID))
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|
goto oom;
|
|
}
|
|
|
|
free(path);
|
|
|
|
if (reply) {
|
|
if (!dbus_connection_send(connection, reply, NULL))
|
|
goto oom;
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|
|
|
dbus_message_unref(reply);
|
|
}
|
|
|
|
return DBUS_HANDLER_RESULT_HANDLED;
|
|
|
|
oom:
|
|
free(path);
|
|
|
|
if (reply)
|
|
dbus_message_unref(reply);
|
|
|
|
dbus_error_free(&error);
|
|
|
|
return DBUS_HANDLER_RESULT_NEED_MEMORY;
|
|
}
|
|
|
|
static DBusHandlerResult bus_unit_message_handler(DBusConnection *connection, DBusMessage *message, void *data) {
|
|
Manager *m = data;
|
|
Unit *u;
|
|
int r;
|
|
|
|
assert(connection);
|
|
assert(message);
|
|
assert(m);
|
|
|
|
if ((r = manager_get_unit_from_dbus_path(m, dbus_message_get_path(message), &u)) < 0) {
|
|
|
|
if (r == -ENOMEM)
|
|
return DBUS_HANDLER_RESULT_NEED_MEMORY;
|
|
|
|
if (r == -ENOENT)
|
|
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
|
|
|
|
return bus_send_error_reply(m, connection, message, NULL, r);
|
|
}
|
|
|
|
return bus_unit_message_dispatch(u, connection, message);
|
|
}
|
|
|
|
const DBusObjectPathVTable bus_unit_vtable = {
|
|
.message_function = bus_unit_message_handler
|
|
};
|
|
|
|
void bus_unit_send_change_signal(Unit *u) {
|
|
char *p = NULL;
|
|
DBusMessage *m = NULL;
|
|
|
|
assert(u);
|
|
|
|
if (u->meta.in_dbus_queue) {
|
|
LIST_REMOVE(Meta, dbus_queue, u->meta.manager->dbus_unit_queue, &u->meta);
|
|
u->meta.in_dbus_queue = false;
|
|
}
|
|
|
|
if (!u->meta.id)
|
|
return;
|
|
|
|
if (!bus_has_subscriber(u->meta.manager)) {
|
|
u->meta.sent_dbus_new_signal = true;
|
|
return;
|
|
}
|
|
|
|
if (!(p = unit_dbus_path(u)))
|
|
goto oom;
|
|
|
|
if (u->meta.sent_dbus_new_signal) {
|
|
/* Send a properties changed signal. First for the
|
|
* specific type, then for the generic unit. The
|
|
* clients may rely on this order to get atomic
|
|
* behaviour if needed. */
|
|
|
|
if (UNIT_VTABLE(u)->bus_invalidating_properties) {
|
|
|
|
if (!(m = bus_properties_changed_new(p,
|
|
UNIT_VTABLE(u)->bus_interface,
|
|
UNIT_VTABLE(u)->bus_invalidating_properties)))
|
|
goto oom;
|
|
|
|
if (bus_broadcast(u->meta.manager, m) < 0)
|
|
goto oom;
|
|
|
|
dbus_message_unref(m);
|
|
}
|
|
|
|
if (!(m = bus_properties_changed_new(p, "org.freedesktop.systemd1.Unit", INVALIDATING_PROPERTIES)))
|
|
goto oom;
|
|
|
|
} else {
|
|
/* Send a new signal */
|
|
|
|
if (!(m = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "UnitNew")))
|
|
goto oom;
|
|
|
|
if (!dbus_message_append_args(m,
|
|
DBUS_TYPE_STRING, &u->meta.id,
|
|
DBUS_TYPE_OBJECT_PATH, &p,
|
|
DBUS_TYPE_INVALID))
|
|
goto oom;
|
|
}
|
|
|
|
if (bus_broadcast(u->meta.manager, m) < 0)
|
|
goto oom;
|
|
|
|
free(p);
|
|
dbus_message_unref(m);
|
|
|
|
u->meta.sent_dbus_new_signal = true;
|
|
|
|
return;
|
|
|
|
oom:
|
|
free(p);
|
|
|
|
if (m)
|
|
dbus_message_unref(m);
|
|
|
|
log_error("Failed to allocate unit change/new signal.");
|
|
}
|
|
|
|
void bus_unit_send_removed_signal(Unit *u) {
|
|
char *p = NULL;
|
|
DBusMessage *m = NULL;
|
|
|
|
assert(u);
|
|
|
|
if (!bus_has_subscriber(u->meta.manager))
|
|
return;
|
|
|
|
if (!u->meta.sent_dbus_new_signal)
|
|
bus_unit_send_change_signal(u);
|
|
|
|
if (!u->meta.id)
|
|
return;
|
|
|
|
if (!(p = unit_dbus_path(u)))
|
|
goto oom;
|
|
|
|
if (!(m = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "UnitRemoved")))
|
|
goto oom;
|
|
|
|
if (!dbus_message_append_args(m,
|
|
DBUS_TYPE_STRING, &u->meta.id,
|
|
DBUS_TYPE_OBJECT_PATH, &p,
|
|
DBUS_TYPE_INVALID))
|
|
goto oom;
|
|
|
|
if (bus_broadcast(u->meta.manager, m) < 0)
|
|
goto oom;
|
|
|
|
free(p);
|
|
dbus_message_unref(m);
|
|
|
|
return;
|
|
|
|
oom:
|
|
free(p);
|
|
|
|
if (m)
|
|
dbus_message_unref(m);
|
|
|
|
log_error("Failed to allocate unit remove signal.");
|
|
}
|