diff options
Diffstat (limited to 'src/grp-system/libcore/src/dbus-scope.c')
| -rw-r--r-- | src/grp-system/libcore/src/dbus-scope.c | 230 |
1 files changed, 230 insertions, 0 deletions
diff --git a/src/grp-system/libcore/src/dbus-scope.c b/src/grp-system/libcore/src/dbus-scope.c new file mode 100644 index 0000000000..da930418d5 --- /dev/null +++ b/src/grp-system/libcore/src/dbus-scope.c @@ -0,0 +1,230 @@ +/*** + This file is part of systemd. + + Copyright 2013 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include "core/scope.h" +#include "core/unit.h" +#include "sd-bus/bus-common-errors.h" +#include "sd-bus/bus-internal.h" +#include "sd-bus/bus-util.h" +#include "systemd-basic/alloc-util.h" + +#include "dbus-cgroup.h" +#include "dbus-kill.h" +#include "dbus-scope.h" +#include "dbus-unit.h" +#include "dbus.h" +#include "selinux-access.h" + +static int bus_scope_abandon(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Scope *s = userdata; + int r; + + assert(message); + assert(s); + + r = mac_selinux_unit_access_check(UNIT(s), message, "stop", error); + if (r < 0) + return r; + + r = bus_verify_manage_units_async(UNIT(s)->manager, message, error); + if (r < 0) + return r; + if (r == 0) + return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */ + + r = scope_abandon(s); + if (r == -ESTALE) + return sd_bus_error_setf(error, BUS_ERROR_SCOPE_NOT_RUNNING, "Scope %s is not running, cannot abandon.", UNIT(s)->id); + if (r < 0) + return r; + + return sd_bus_reply_method_return(message, NULL); +} + +static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_result, scope_result, ScopeResult); + +const sd_bus_vtable bus_scope_vtable[] = { + SD_BUS_VTABLE_START(0), + SD_BUS_PROPERTY("Controller", "s", NULL, offsetof(Scope, controller), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("TimeoutStopUSec", "t", bus_property_get_usec, offsetof(Scope, timeout_stop_usec), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("Result", "s", property_get_result, offsetof(Scope, result), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + SD_BUS_SIGNAL("RequestStop", NULL, 0), + SD_BUS_METHOD("Abandon", NULL, NULL, bus_scope_abandon, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_VTABLE_END +}; + +static int bus_scope_set_transient_property( + Scope *s, + const char *name, + sd_bus_message *message, + UnitSetPropertiesMode mode, + sd_bus_error *error) { + + int r; + + assert(s); + assert(name); + assert(message); + + if (streq(name, "PIDs")) { + unsigned n = 0; + uint32_t pid; + + r = sd_bus_message_enter_container(message, 'a', "u"); + if (r < 0) + return r; + + while ((r = sd_bus_message_read(message, "u", &pid)) > 0) { + + if (pid <= 1) + return -EINVAL; + + if (mode != UNIT_CHECK) { + r = unit_watch_pid(UNIT(s), pid); + if (r < 0 && r != -EEXIST) + return r; + } + + n++; + } + if (r < 0) + return r; + + r = sd_bus_message_exit_container(message); + if (r < 0) + return r; + + if (n <= 0) + return -EINVAL; + + return 1; + + } else if (streq(name, "Controller")) { + const char *controller; + char *c; + + r = sd_bus_message_read(message, "s", &controller); + if (r < 0) + return r; + + if (!isempty(controller) && !service_name_is_valid(controller)) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Controller '%s' is not a valid bus name.", controller); + + if (mode != UNIT_CHECK) { + if (isempty(controller)) + c = NULL; + else { + c = strdup(controller); + if (!c) + return -ENOMEM; + } + + free(s->controller); + s->controller = c; + } + + return 1; + + } else if (streq(name, "TimeoutStopUSec")) { + + if (mode != UNIT_CHECK) { + r = sd_bus_message_read(message, "t", &s->timeout_stop_usec); + if (r < 0) + return r; + + unit_write_drop_in_private_format(UNIT(s), mode, name, "TimeoutStopSec="USEC_FMT"us", s->timeout_stop_usec); + } else { + r = sd_bus_message_skip(message, "t"); + if (r < 0) + return r; + } + + return 1; + } + + return 0; +} + +int bus_scope_set_property( + Unit *u, + const char *name, + sd_bus_message *message, + UnitSetPropertiesMode mode, + sd_bus_error *error) { + + Scope *s = SCOPE(u); + int r; + + assert(s); + assert(name); + assert(message); + + r = bus_cgroup_set_property(u, &s->cgroup_context, name, message, mode, error); + if (r != 0) + return r; + + if (u->load_state == UNIT_STUB) { + /* While we are created we still accept PIDs */ + + r = bus_scope_set_transient_property(s, name, message, mode, error); + if (r != 0) + return r; + + r = bus_kill_context_set_transient_property(u, &s->kill_context, name, message, mode, error); + if (r != 0) + return r; + } + + return 0; +} + +int bus_scope_commit_properties(Unit *u) { + assert(u); + + unit_update_cgroup_members_masks(u); + unit_realize_cgroup(u); + + return 0; +} + +int bus_scope_send_request_stop(Scope *s) { + _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; + _cleanup_free_ char *p = NULL; + int r; + + assert(s); + + if (!s->controller) + return 0; + + p = unit_dbus_path(UNIT(s)); + if (!p) + return -ENOMEM; + + r = sd_bus_message_new_signal( + UNIT(s)->manager->api_bus, + &m, + p, + "org.freedesktop.systemd1.Scope", + "RequestStop"); + if (r < 0) + return r; + + return sd_bus_send_to(UNIT(s)->manager->api_bus, m, s->controller, NULL); +} |