return u;
}
+bool unit_has_name(Unit *u, const char *name) {
+ assert(u);
+ assert(name);
+
+ return !!set_get(u->meta.names, (char*) name);
+}
+
int unit_add_name(Unit *u, const char *text) {
UnitType t;
char *s;
void unit_add_to_load_queue(Unit *u) {
assert(u);
+ assert(u->meta.type != _UNIT_TYPE_INVALID);
if (u->meta.load_state != UNIT_STUB || u->meta.in_load_queue)
return;
u->meta.in_load_queue = true;
}
+void unit_add_to_cleanup_queue(Unit *u) {
+ assert(u);
+
+ if (u->meta.in_cleanup_queue)
+ return;
+
+ LIST_PREPEND(Meta, cleanup_queue, u->meta.manager->cleanup_queue, &u->meta);
+ u->meta.in_cleanup_queue = true;
+}
+
void unit_add_to_dbus_queue(Unit *u) {
assert(u);
+ assert(u->meta.type != _UNIT_TYPE_INVALID);
if (u->meta.load_state == UNIT_STUB || u->meta.in_dbus_queue || set_isempty(u->meta.manager->subscribed))
return;
if (u->meta.in_dbus_queue)
LIST_REMOVE(Meta, dbus_queue, u->meta.manager->dbus_unit_queue, &u->meta);
- if (u->meta.load_state == UNIT_LOADED)
+ if (u->meta.in_cleanup_queue)
+ LIST_REMOVE(Meta, cleanup_queue, u->meta.manager->cleanup_queue, &u->meta);
+
+ if (u->meta.load_state != UNIT_STUB)
if (UNIT_VTABLE(u)->done)
UNIT_VTABLE(u)->done(u);
return UNIT_VTABLE(u)->active_state(u);
}
-static int ensure_merge(Set **s, Set *other) {
+static void complete_move(Set **s, Set **other) {
+ assert(s);
+ assert(other);
- if (!other)
- return 0;
+ if (!*other)
+ return;
if (*s)
- return set_merge(*s, other);
+ set_move(*s, *other);
+ else {
+ *s = *other;
+ *other = NULL;
+ }
+}
- if (!(*s = set_copy(other)))
- return -ENOMEM;
+static void merge_names(Unit *u, Unit *other) {
+ char *t;
+ Iterator i;
- return 0;
+ assert(u);
+ assert(other);
+
+ complete_move(&u->meta.names, &other->meta.names);
+
+ while ((t = set_steal_first(other->meta.names)))
+ free(t);
+
+ set_free(other->meta.names);
+ other->meta.names = NULL;
+ other->meta.id = NULL;
+
+ SET_FOREACH(t, u->meta.names, i)
+ assert_se(hashmap_replace(u->meta.manager->units, t, u) == 0);
}
-/* FIXME: Does not rollback on failure! Needs to fix special unit
- * pointers. Needs to merge names and dependencies properly.*/
-int unit_merge(Unit *u, Unit *other) {
+static void merge_dependencies(Unit *u, Unit *other, UnitDependency d) {
+ Iterator i;
+ Unit *back;
int r;
+
+ assert(u);
+ assert(other);
+ assert(d < _UNIT_DEPENDENCY_MAX);
+
+ SET_FOREACH(back, other->meta.dependencies[d], i) {
+ UnitDependency k;
+
+ for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++)
+ if ((r = set_remove_and_put(back->meta.dependencies[k], other, u)) < 0) {
+
+ if (r == -EEXIST)
+ set_remove(back->meta.dependencies[k], other);
+ else
+ assert(r == -ENOENT);
+ }
+ }
+
+ complete_move(&u->meta.dependencies[d], &other->meta.dependencies[d]);
+
+ set_free(other->meta.dependencies[d]);
+ other->meta.dependencies[d] = NULL;
+}
+
+int unit_merge(Unit *u, Unit *other) {
UnitDependency d;
assert(u);
assert(other);
assert(u->meta.manager == other->meta.manager);
+ other = unit_follow_merge(other);
+
+ if (other == u)
+ return 0;
+
/* This merges 'other' into 'unit'. FIXME: This does not
* rollback on failure. */
if (u->meta.type != u->meta.type)
return -EINVAL;
- if (u->meta.load_state != UNIT_STUB)
- return -EINVAL;
+ if (other->meta.load_state != UNIT_STUB &&
+ other->meta.load_state != UNIT_FAILED)
+ return -EEXIST;
+
+ if (other->meta.job)
+ return -EEXIST;
+
+ if (unit_active_state(other) != UNIT_INACTIVE)
+ return -EEXIST;
/* Merge names */
- if ((r = ensure_merge(&u->meta.names, other->meta.names)) < 0)
- return r;
+ merge_names(u, other);
/* Merge dependencies */
for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++)
- /* fixme, the inverse mapping is missing */
- if ((r = ensure_merge(&u->meta.dependencies[d], other->meta.dependencies[d])) < 0)
- return r;
+ merge_dependencies(u, other, d);
+
+ other->meta.load_state = UNIT_MERGED;
+ other->meta.merged_into = u;
+
+ /* If there is still some data attached to the other node, we
+ * don't need it anymore, and can free it. */
+ if (other->meta.load_state != UNIT_STUB)
+ if (UNIT_VTABLE(other)->done)
+ UNIT_VTABLE(other)->done(other);
unit_add_to_dbus_queue(u);
+ unit_add_to_cleanup_queue(other);
+
+ return 0;
+}
+
+int unit_merge_by_name(Unit *u, const char *name) {
+ Unit *other;
+
+ assert(u);
+ assert(name);
+
+ if (!(other = manager_get_unit(u->meta.manager, name)))
+ return unit_add_name(u, name);
+
+ return unit_merge(u, other);
+}
+
+Unit* unit_follow_merge(Unit *u) {
+ assert(u);
+
+ while (u->meta.load_state == UNIT_MERGED)
+ assert_se(u = u->meta.merged_into);
+
+ return u;
+}
+
+int unit_add_exec_dependencies(Unit *u, ExecContext *c) {
+ int r;
+
+ assert(u);
+ assert(c);
+
+ if (c->output != EXEC_OUTPUT_KERNEL && c->output != EXEC_OUTPUT_SYSLOG)
+ return 0;
+
+ /* If syslog or kernel logging is requested, make sure our own
+ * logging daemon is run first. */
+
+ if ((r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_LOGGER_SOCKET)) < 0)
+ return r;
+
+ if (u->meta.manager->running_as != MANAGER_SESSION)
+ if ((r = unit_add_dependency_by_name(u, UNIT_REQUIRES, SPECIAL_LOGGER_SOCKET)) < 0)
+ return r;
return 0;
}
char *p2;
const char *prefix2;
CGroupBonding *b;
+ char timestamp1[FORMAT_TIMESTAMP_MAX], timestamp2[FORMAT_TIMESTAMP_MAX];
assert(u);
"%s\tDescription: %s\n"
"%s\tUnit Load State: %s\n"
"%s\tUnit Active State: %s\n"
- "%s\tRecursive Stop: %s\n"
- "%s\tStop When Unneeded: %s\n",
+ "%s\tActive Enter Timestamp: %s\n"
+ "%s\tActive Exit Timestamp: %s\n",
prefix, unit_id(u),
prefix, unit_description(u),
prefix, unit_load_state_to_string(u->meta.load_state),
prefix, unit_active_state_to_string(unit_active_state(u)),
- prefix, yes_no(u->meta.recursive_stop),
- prefix, yes_no(u->meta.stop_when_unneeded));
-
- if (u->meta.fragment_path)
- fprintf(f, "%s\tFragment Path: %s\n", prefix, u->meta.fragment_path);
+ prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->meta.active_enter_timestamp)),
+ prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->meta.active_exit_timestamp)));
SET_FOREACH(t, u->meta.names, i)
fprintf(f, "%s\tName: %s\n", prefix, t);
+ if (u->meta.fragment_path)
+ fprintf(f, "%s\tFragment Path: %s\n", prefix, u->meta.fragment_path);
+
for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) {
Unit *other;
- if (set_isempty(u->meta.dependencies[d]))
- continue;
-
SET_FOREACH(other, u->meta.dependencies[d], i)
fprintf(f, "%s\t%s: %s\n", prefix, unit_dependency_to_string(d), unit_id(other));
}
- LIST_FOREACH(by_unit, b, u->meta.cgroup_bondings)
- fprintf(f, "%s\tControlGroup: %s:%s\n",
- prefix, b->controller, b->path);
+ if (u->meta.load_state == UNIT_LOADED) {
+ fprintf(f,
+ "%s\tRecursive Stop: %s\n"
+ "%s\tStop When Unneeded: %s\n",
+ prefix, yes_no(u->meta.recursive_stop),
+ prefix, yes_no(u->meta.stop_when_unneeded));
- if (UNIT_VTABLE(u)->dump)
- UNIT_VTABLE(u)->dump(u, f, prefix2);
+ LIST_FOREACH(by_unit, b, u->meta.cgroup_bondings)
+ fprintf(f, "%s\tControlGroup: %s:%s\n",
+ prefix, b->controller, b->path);
+
+ if (UNIT_VTABLE(u)->dump)
+ UNIT_VTABLE(u)->dump(u, f, prefix2);
+
+ } else if (u->meta.load_state == UNIT_MERGED)
+ fprintf(f,
+ "%s\tMerged into: %s\n",
+ prefix, unit_id(u->meta.merged_into));
if (u->meta.job)
job_dump(u->meta.job, f, prefix2);
}
/* Common implementation for multiple backends */
-int unit_load_fragment_and_dropin(Unit *u) {
- int r, ret;
+int unit_load_fragment_and_dropin(Unit *u, UnitLoadState *new_state) {
+ int r;
+
+ assert(u);
+ assert(new_state);
+ assert(*new_state == UNIT_STUB || *new_state == UNIT_LOADED);
+
+ /* Load a .service file */
+ if ((r = unit_load_fragment(u, new_state)) < 0)
+ return r;
+
+ if (*new_state == UNIT_STUB)
+ return -ENOENT;
+
+ /* Load drop-in directory data */
+ if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
+ return r;
+
+ return 0;
+}
+
+/* Common implementation for multiple backends */
+int unit_load_fragment_and_dropin_optional(Unit *u, UnitLoadState *new_state) {
+ int r;
assert(u);
+ assert(new_state);
+ assert(*new_state == UNIT_STUB || *new_state == UNIT_LOADED);
+
+ /* Same as unit_load_fragment_and_dropin(), but whether
+ * something can be loaded or not doesn't matter. */
- /* Load a .socket file */
- if ((r = unit_load_fragment(u)) < 0)
+ /* Load a .service file */
+ if ((r = unit_load_fragment(u, new_state)) < 0)
return r;
- ret = r > 0;
+ if (*new_state == UNIT_STUB)
+ *new_state = UNIT_LOADED;
/* Load drop-in directory data */
- if ((r = unit_load_dropin(u)) < 0)
+ if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
return r;
- return ret;
+ return 0;
}
int unit_load(Unit *u) {
int r;
+ UnitLoadState res;
assert(u);
if (u->meta.load_state != UNIT_STUB)
return 0;
- if (UNIT_VTABLE(u)->init)
- if ((r = UNIT_VTABLE(u)->init(u)) < 0)
+ if (UNIT_VTABLE(u)->init) {
+ res = UNIT_STUB;
+ if ((r = UNIT_VTABLE(u)->init(u, &res)) < 0)
goto fail;
+ }
+
+ if (res == UNIT_STUB) {
+ r = -ENOENT;
+ goto fail;
+ }
+
+ u->meta.load_state = res;
+ assert((u->meta.load_state != UNIT_MERGED) == !u->meta.merged_into);
+
+ unit_add_to_dbus_queue(unit_follow_merge(u));
- u->meta.load_state = UNIT_LOADED;
- unit_add_to_dbus_queue(u);
return 0;
fail:
u->meta.load_state = UNIT_FAILED;
unit_add_to_dbus_queue(u);
+
+ log_error("Failed to load configuration for %s: %s", unit_id(u), strerror(-r));
+
return r;
}
}
void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns) {
+ bool unexpected = false;
+
assert(u);
assert(os < _UNIT_ACTIVE_STATE_MAX);
assert(ns < _UNIT_ACTIVE_STATE_MAX);
assert(!(os == UNIT_ACTIVE && ns == UNIT_ACTIVATING));
assert(!(os == UNIT_INACTIVE && ns == UNIT_DEACTIVATING));
- if (os == ns)
- return;
+ /* Note that this is called for all low-level state changes,
+ * even if they might map to the same high-level
+ * UnitActiveState! That means that ns == os is OK an expected
+ * behaviour here. For example: if a mount point is remounted
+ * this function will be called too and the utmp code below
+ * relies on that! */
if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns))
u->meta.active_enter_timestamp = now(CLOCK_REALTIME);
case JOB_START:
case JOB_VERIFY_ACTIVE:
- if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) {
+ if (UNIT_IS_ACTIVE_OR_RELOADING(ns))
job_finish_and_invalidate(u->meta.job, true);
- return;
- } else if (ns == UNIT_ACTIVATING)
- return;
- else
+ else if (ns != UNIT_ACTIVATING) {
+ unexpected = true;
job_finish_and_invalidate(u->meta.job, false);
+ }
break;
case JOB_RELOAD:
case JOB_RELOAD_OR_START:
- if (ns == UNIT_ACTIVE) {
+ if (ns == UNIT_ACTIVE)
job_finish_and_invalidate(u->meta.job, true);
- return;
- } else if (ns == UNIT_ACTIVATING || ns == UNIT_ACTIVE_RELOADING)
- return;
- else
+ else if (ns != UNIT_ACTIVATING && ns != UNIT_ACTIVE_RELOADING) {
+ unexpected = true;
job_finish_and_invalidate(u->meta.job, false);
+ }
break;
case JOB_RESTART:
case JOB_TRY_RESTART:
- if (ns == UNIT_INACTIVE) {
+ if (ns == UNIT_INACTIVE)
job_finish_and_invalidate(u->meta.job, true);
- return;
- } else if (ns == UNIT_DEACTIVATING)
- return;
- else
+ else if (ns != UNIT_DEACTIVATING) {
+ unexpected = true;
job_finish_and_invalidate(u->meta.job, false);
+ }
break;
/* If this state change happened without being requested by a
* job, then let's retroactively start or stop dependencies */
- if (UNIT_IS_INACTIVE_OR_DEACTIVATING(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns))
- retroactively_start_dependencies(u);
- else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns))
- retroactively_stop_dependencies(u);
+ if (unexpected) {
+ if (UNIT_IS_INACTIVE_OR_DEACTIVATING(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns))
+ retroactively_start_dependencies(u);
+ else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns))
+ retroactively_stop_dependencies(u);
+ }
+
+ if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) {
+
+ if (unit_has_name(u, SPECIAL_DBUS_SERVICE)) {
+ log_info("D-Bus became available, trying to reconnect.");
+ /* The bus just got started, hence try to connect to it. */
+ bus_init_system(u->meta.manager);
+ bus_init_api(u->meta.manager);
+ }
+
+ if (unit_has_name(u, SPECIAL_SYSLOG_SERVICE)) {
+ /* The syslog daemon just got started, hence try to connect to it. */
+ log_info("Syslog became available, trying to reconnect.");
+ log_open_syslog();
+ }
+
+ } else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) {
+
+ if (unit_has_name(u, SPECIAL_SYSLOG_SERVICE))
+ /* The syslog daemon just got terminated, hence try to disconnect from it. */
+ log_close_syslog();
+
+ /* We don't care about D-Bus here, since we'll get an
+ * asynchronous notification for it anyway. */
+ }
/* Maybe we finished startup and are now ready for being
* stopped because unneeded? */
return 0;
}
+static char *default_cgroup_path(Unit *u) {
+ char *p;
+
+ assert(u);
+
+ if (asprintf(&p, "%s/%s", u->meta.manager->cgroup_hierarchy, unit_id(u)) < 0)
+ return NULL;
+
+ return p;
+}
+
int unit_add_cgroup_from_text(Unit *u, const char *name) {
size_t n;
- const char *p;
- char *controller;
- CGroupBonding *b;
+ char *controller = NULL, *path = NULL;
+ CGroupBonding *b = NULL;
int r;
assert(u);
assert(name);
/* Detect controller name */
- n = strcspn(name, ":/");
+ n = strcspn(name, ":");
- /* Only controller name, no path? No path? */
- if (name[n] == 0)
- return -EINVAL;
+ if (name[n] == 0 ||
+ (name[n] == ':' && name[n+1] == 0)) {
- if (n > 0) {
- if (name[n] != ':')
- return -EINVAL;
+ /* Only controller name, no path? */
- p = name+n+1;
- } else
- p = name;
+ if (!(path = default_cgroup_path(u)))
+ return -ENOMEM;
- /* Insist in absolute paths */
- if (p[0] != '/')
- return -EINVAL;
+ } else {
+ const char *p;
- if (!(controller = strndup(name, n)))
- return -ENOMEM;
+ /* Controller name, and path. */
+ p = name+n+1;
- if (cgroup_bonding_find_list(u->meta.cgroup_bondings, controller)) {
- free(controller);
- return -EEXIST;
+ if (!path_is_absolute(p))
+ return -EINVAL;
+
+ if (!(path = strdup(p)))
+ return -ENOMEM;
}
- if (!(b = new0(CGroupBonding, 1))) {
- free(controller);
- return -ENOMEM;
+ if (n > 0)
+ controller = strndup(name, n);
+ else
+ controller = strdup(u->meta.manager->cgroup_controller);
+
+ if (!controller) {
+ r = -ENOMEM;
+ goto fail;
}
- b->controller = controller;
+ if (cgroup_bonding_find_list(u->meta.cgroup_bondings, controller)) {
+ r = -EEXIST;
+ goto fail;
+ }
- if (!(b->path = strdup(p))) {
+ if (!(b = new0(CGroupBonding, 1))) {
r = -ENOMEM;
goto fail;
}
+ b->controller = controller;
+ b->path = path;
b->only_us = false;
b->clean_up = false;
return 0;
fail:
- free(b->path);
- free(b->controller);
+ free(path);
+ free(controller);
free(b);
return r;
if (!(b->controller = strdup(u->meta.manager->cgroup_controller)))
goto fail;
- if (asprintf(&b->path, "%s/%s", u->meta.manager->cgroup_hierarchy, unit_id(u)) < 0)
+ if (!(b->path = default_cgroup_path(u)))
goto fail;
b->clean_up = true;
static const char* const unit_load_state_table[_UNIT_LOAD_STATE_MAX] = {
[UNIT_STUB] = "stub",
[UNIT_LOADED] = "loaded",
- [UNIT_FAILED] = "failed"
+ [UNIT_FAILED] = "failed",
+ [UNIT_MERGED] = "merged"
};
DEFINE_STRING_TABLE_LOOKUP(unit_load_state, UnitLoadState);
};
DEFINE_STRING_TABLE_LOOKUP(unit_dependency, UnitDependency);
+
+static const char* const kill_mode_table[_KILL_MODE_MAX] = {
+ [KILL_PROCESS] = "process",
+ [KILL_PROCESS_GROUP] = "process-group",
+ [KILL_CONTROL_GROUP] = "control-group"
+};
+
+DEFINE_STRING_TABLE_LOOKUP(kill_mode, KillMode);
~ianmdlvl / elogind.git / blobdiff