picnoir/Systemd
1
0
Fork 0
Code Issues Pull requests Projects Releases Wiki Activity
Systemd/src/machine/machined.c
Lennart Poettering 0c69794138 tree-wide: remove Lennart's copyright lines 
These lines are generally out-of-date, incomplete and unnecessary. With
SPDX and git repository much more accurate and fine grained information
about licensing and authorship is available, hence let's drop the
per-file copyright notice. Of course, removing copyright lines of others
is problematic, hence this commit only removes my own lines and leaves
all others untouched. It might be nicer if sooner or later those could
go away too, making git the only and accurate source of authorship
information.
2018-06-14 10:20:20 +02:00

401 lines
12 KiB
C
Raw Blame History

/* SPDX-License-Identifier: LGPL-2.1+ */
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include "sd-daemon.h"
#include "alloc-util.h"
#include "bus-error.h"
#include "bus-util.h"
#include "cgroup-util.h"
#include "dirent-util.h"
#include "fd-util.h"
#include "format-util.h"
#include "hostname-util.h"
#include "label.h"
#include "machine-image.h"
#include "machined.h"
#include "process-util.h"
#include "signal-util.h"
#include "special.h"
static Manager* manager_unref(Manager *m);
DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_unref);
static int manager_new(Manager **ret) {
_cleanup_(manager_unrefp) Manager *m = NULL;
int r;
assert(ret);
m = new0(Manager, 1);
if (!m)
return -ENOMEM;
m->machines = hashmap_new(&string_hash_ops);
m->machine_units = hashmap_new(&string_hash_ops);
m->machine_leaders = hashmap_new(NULL);
if (!m->machines || !m->machine_units || !m->machine_leaders)
return -ENOMEM;
r = sd_event_default(&m->event);
if (r < 0)
return r;
r = sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL);
if (r < 0)
return r;
r = sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL);
if (r < 0)
return r;
(void) sd_event_set_watchdog(m->event, true);
*ret = TAKE_PTR(m);
return 0;
}
static Manager* manager_unref(Manager *m) {
Machine *machine;
if (!m)
return NULL;
while (m->operations)
operation_free(m->operations);
assert(m->n_operations == 0);
while ((machine = hashmap_first(m->machines)))
machine_free(machine);
hashmap_free(m->machines);
hashmap_free(m->machine_units);
hashmap_free(m->machine_leaders);
hashmap_free_with_destructor(m->image_cache, image_unref);
sd_event_source_unref(m->image_cache_defer_event);
bus_verify_polkit_async_registry_free(m->polkit_registry);
sd_bus_unref(m->bus);
sd_event_unref(m->event);
return mfree(m);
}
static int manager_add_host_machine(Manager *m) {
_cleanup_free_ char *rd = NULL, *unit = NULL;
sd_id128_t mid;
Machine *t;
int r;
if (m->host_machine)
return 0;
r = sd_id128_get_machine(&mid);
if (r < 0)
return log_error_errno(r, "Failed to get machine ID: %m");
rd = strdup("/");
if (!rd)
return log_oom();
unit = strdup(SPECIAL_ROOT_SLICE);
if (!unit)
return log_oom();
t = machine_new(m, MACHINE_HOST, ".host");
if (!t)
return log_oom();
t->leader = 1;
t->id = mid;
t->root_directory = TAKE_PTR(rd);
t->unit = TAKE_PTR(unit);
dual_timestamp_from_boottime_or_monotonic(&t->timestamp, 0);
m->host_machine = t;
return 0;
}
static int manager_enumerate_machines(Manager *m) {
_cleanup_closedir_ DIR *d = NULL;
struct dirent *de;
int r = 0;
assert(m);
r = manager_add_host_machine(m);
if (r < 0)
return r;
/* Read in machine data stored on disk */
d = opendir("/run/systemd/machines");
if (!d) {
if (errno == ENOENT)
return 0;
return log_error_errno(errno, "Failed to open /run/systemd/machines: %m");
}
FOREACH_DIRENT(de, d, return -errno) {
struct Machine *machine;
int k;
if (!dirent_is_file(de))
continue;
/* Ignore symlinks that map the unit name to the machine */
if (startswith(de->d_name, "unit:"))
continue;
if (!machine_name_is_valid(de->d_name))
continue;
k = manager_add_machine(m, de->d_name, &machine);
if (k < 0) {
r = log_error_errno(k, "Failed to add machine by file name %s: %m", de->d_name);
continue;
}
machine_add_to_gc_queue(machine);
k = machine_load(machine);
if (k < 0)
r = k;
}
return r;
}
static int manager_connect_bus(Manager *m) {
int r;
assert(m);
assert(!m->bus);
r = sd_bus_default_system(&m->bus);
if (r < 0)
return log_error_errno(r, "Failed to connect to system bus: %m");
r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/machine1", "org.freedesktop.machine1.Manager", manager_vtable, m);
if (r < 0)
return log_error_errno(r, "Failed to add manager object vtable: %m");
r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/machine1/machine", "org.freedesktop.machine1.Machine", machine_vtable, machine_object_find, m);
if (r < 0)
return log_error_errno(r, "Failed to add machine object vtable: %m");
r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/machine1/machine", machine_node_enumerator, m);
if (r < 0)
return log_error_errno(r, "Failed to add machine enumerator: %m");
r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/machine1/image", "org.freedesktop.machine1.Image", image_vtable, image_object_find, m);
if (r < 0)
return log_error_errno(r, "Failed to add image object vtable: %m");
r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/machine1/image", image_node_enumerator, m);
if (r < 0)
return log_error_errno(r, "Failed to add image enumerator: %m");
r = sd_bus_match_signal_async(
m->bus,
NULL,
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
"JobRemoved",
match_job_removed, NULL, m);
if (r < 0)
return log_error_errno(r, "Failed to add match for JobRemoved: %m");
r = sd_bus_match_signal_async(
m->bus,
NULL,
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
"UnitRemoved",
match_unit_removed, NULL, m);
if (r < 0)
return log_error_errno(r, "Failed to request match for UnitRemoved: %m");
r = sd_bus_match_signal_async(
m->bus,
NULL,
"org.freedesktop.systemd1",
NULL,
"org.freedesktop.DBus.Properties",
"PropertiesChanged",
match_properties_changed, NULL, m);
if (r < 0)
return log_error_errno(r, "Failed to request match for PropertiesChanged: %m");
r = sd_bus_match_signal_async(
m->bus,
NULL,
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
"Reloading",
match_reloading, NULL, m);
if (r < 0)
return log_error_errno(r, "Failed to request match for Reloading: %m");
r = sd_bus_call_method_async(
m->bus,
NULL,
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
"Subscribe",
NULL, NULL,
NULL);
if (r < 0)
return log_error_errno(r, "Failed to enable subscription: %m");
r = sd_bus_request_name_async(m->bus, NULL, "org.freedesktop.machine1", 0, NULL, NULL);
if (r < 0)
return log_error_errno(r, "Failed to request name: %m");
r = sd_bus_attach_event(m->bus, m->event, 0);
if (r < 0)
return log_error_errno(r, "Failed to attach bus to event loop: %m");
return 0;
}
static void manager_gc(Manager *m, bool drop_not_started) {
Machine *machine;
assert(m);
while ((machine = m->machine_gc_queue)) {
LIST_REMOVE(gc_queue, m->machine_gc_queue, machine);
machine->in_gc_queue = false;
/* First, if we are not closing yet, initiate stopping */
if (machine_may_gc(machine, drop_not_started) &&
machine_get_state(machine) != MACHINE_CLOSING)
machine_stop(machine);
/* Now, the stop probably made this referenced
* again, but if it didn't, then it's time to let it
* go entirely. */
if (machine_may_gc(machine, drop_not_started)) {
machine_finalize(machine);
machine_free(machine);
}
}
}
static int manager_startup(Manager *m) {
Machine *machine;
Iterator i;
int r;
assert(m);
/* Connect to the bus */
r = manager_connect_bus(m);
if (r < 0)
return r;
/* Deserialize state */
manager_enumerate_machines(m);
/* Remove stale objects before we start them */
manager_gc(m, false);
/* And start everything */
HASHMAP_FOREACH(machine, m->machines, i)
machine_start(machine, NULL, NULL);
return 0;
}
static bool check_idle(void *userdata) {
Manager *m = userdata;
if (m->operations)
return false;
manager_gc(m, true);
return hashmap_isempty(m->machines);
}
static int manager_run(Manager *m) {
assert(m);
return bus_event_loop_with_idle(
m->event,
m->bus,
"org.freedesktop.machine1",
DEFAULT_EXIT_USEC,
check_idle, m);
}
int main(int argc, char *argv[]) {
_cleanup_(manager_unrefp) Manager *m = NULL;
int r;
log_set_target(LOG_TARGET_AUTO);
log_set_facility(LOG_AUTH);
log_parse_environment();
log_open();
umask(0022);
if (argc != 1) {
log_error("This program takes no arguments.");
r = -EINVAL;
goto finish;
}
/* Always create the directories people can create inotify watches in. Note that some applications might check
* for the existence of /run/systemd/machines/ to determine whether machined is available, so please always
* make sure this check stays in. */
(void) mkdir_label("/run/systemd/machines", 0755);
assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGCHLD, SIGTERM, SIGINT, -1) >= 0);
r = manager_new(&m);
if (r < 0) {
log_error_errno(r, "Failed to allocate manager object: %m");
goto finish;
}
r = manager_startup(m);
if (r < 0) {
log_error_errno(r, "Failed to fully start up daemon: %m");
goto finish;
}
log_debug("systemd-machined running as pid "PID_FMT, getpid_cached());
(void) sd_notify(false,
"READY=1\n"
"STATUS=Processing requests...");
r = manager_run(m);
log_debug("systemd-machined stopped as pid "PID_FMT, getpid_cached());
(void) sd_notify(false,
"STOPPING=1\n"
"STATUS=Shutting down...");
finish:
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}
Reference in a new issue View git blame Copy permalink