#include "dbus.h"
#include "execute.h"
#include "virt.h"
+#include "dropin.h"
const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = {
[UNIT_SERVICE] = &service_vtable,
[UNIT_SCOPE] = &scope_vtable
};
+static int maybe_warn_about_dependency(const char *id, const char *other, UnitDependency dependency);
+
Unit *unit_new(Manager *m, size_t size) {
Unit *u;
if (!u)
return NULL;
- u->names = set_new(string_hash_func, string_compare_func);
+ u->names = set_new(&string_hash_ops);
if (!u->names) {
free(u);
return NULL;
cc->cpu_accounting = u->manager->default_cpu_accounting;
cc->blockio_accounting = u->manager->default_blockio_accounting;
cc->memory_accounting = u->manager->default_memory_accounting;
- cc->cpu_quota_period_usec = u->manager->default_cpu_quota_period_usec;
}
ec = unit_get_exec_context(u);
}
set_remove(u->manager->failed_units, u);
+ set_remove(u->manager->startup_units, u);
free(u->description);
strv_free(u->documentation);
assert_se(hashmap_replace(u->manager->units, t, u) == 0);
}
-static void merge_dependencies(Unit *u, Unit *other, UnitDependency d) {
+static void merge_dependencies(Unit *u, Unit *other, const char *other_id, UnitDependency d) {
Iterator i;
Unit *back;
int r;
UnitDependency k;
for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++) {
- r = set_remove_and_put(back->dependencies[k], other, u);
- if (r == -EEXIST)
- set_remove(back->dependencies[k], other);
- else
- assert(r >= 0 || r == -ENOENT);
+ /* Do not add dependencies between u and itself */
+ if (back == u) {
+ if (set_remove(back->dependencies[k], other))
+ maybe_warn_about_dependency(u->id, other_id, k);
+ } else {
+ r = set_remove_and_put(back->dependencies[k], other, u);
+ if (r == -EEXIST)
+ set_remove(back->dependencies[k], other);
+ else
+ assert(r >= 0 || r == -ENOENT);
+ }
}
}
+ /* Also do not move dependencies on u to itself */
+ back = set_remove(other->dependencies[d], u);
+ if (back)
+ maybe_warn_about_dependency(u->id, other_id, d);
+
complete_move(&u->dependencies[d], &other->dependencies[d]);
set_free(other->dependencies[d]);
int unit_merge(Unit *u, Unit *other) {
UnitDependency d;
+ const char *other_id = NULL;
assert(u);
assert(other);
if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other)))
return -EEXIST;
+ if (other->id)
+ other_id = strdupa(other->id);
+
/* Merge names */
merge_names(u, other);
/* Merge dependencies */
for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++)
- merge_dependencies(u, other, d);
+ merge_dependencies(u, other, other_id, d);
other->load_state = UNIT_MERGED;
other->merged_into = u;
char *t, **j;
UnitDependency d;
Iterator i;
- _cleanup_free_ char *p2 = NULL;
const char *prefix2;
char
timestamp1[FORMAT_TIMESTAMP_MAX],
assert(u);
assert(u->type >= 0);
- if (!prefix)
- prefix = "";
- p2 = strappend(prefix, "\t");
- prefix2 = p2 ? p2 : prefix;
+ prefix = strempty(prefix);
+ prefix2 = strappenda(prefix, "\t");
fprintf(f,
"%s-> Unit %s:\n"
if (UNIT_ISSET(u->slice))
return unit_add_two_dependencies(u, UNIT_AFTER, UNIT_WANTS, UNIT_DEREF(u->slice), true);
+ if (streq(u->id, SPECIAL_ROOT_SLICE))
+ return 0;
+
return unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, SPECIAL_ROOT_SLICE, NULL, true);
}
int r = 0;
c = unit_get_cgroup_context(u);
- if (c != NULL && manager_state(u->manager) == MANAGER_STARTING &&
- (c->startup_cpu_shares_set || c->startup_blockio_weight_set)) {
- r = set_put(u->manager->startup_units, u);
- if (r == -EEXIST)
- r = 0;
- }
+ if (!c)
+ return 0;
+
+ if (c->startup_cpu_shares == (unsigned long) -1 &&
+ c->startup_blockio_weight == (unsigned long) -1)
+ return 0;
+
+ r = set_put(u->manager->startup_units, u);
+ if (r == -EEXIST)
+ return 0;
+
return r;
}
if (unit_active_or_pending(other))
return;
- log_info_unit(u->id, "Service %s is not needed anymore. Stopping.", u->id);
+ log_info_unit(u->id, "Unit %s is not needed anymore. Stopping.", u->id);
/* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */
manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, true, NULL, NULL);
}
+static void unit_check_binds_to(Unit *u) {
+ bool stop = false;
+ Unit *other;
+ Iterator i;
+
+ assert(u);
+
+ if (u->job)
+ return;
+
+ if (unit_active_state(u) != UNIT_ACTIVE)
+ return;
+
+ SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) {
+ if (other->job)
+ continue;
+
+ if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other)))
+ continue;
+
+ stop = true;
+ }
+
+ if (!stop)
+ return;
+
+ log_info_unit(u->id, "Unit %s is bound to inactive service. Stopping, too.", u->id);
+
+ /* A unit we need to run is gone. Sniff. Let's stop this. */
+ manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, true, NULL, NULL);
+}
+
static void retroactively_start_dependencies(Unit *u) {
Iterator i;
Unit *other;
/* 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
+ * UnitActiveState! That means that ns == os is an expected
* behavior here. For example: if a mount point is remounted
* this function will be called too! */
u->active_exit_timestamp = ts;
}
- /* Keep track of failed of units */
- if (ns == UNIT_FAILED && os != UNIT_FAILED)
+ /* Keep track of failed units */
+ if (ns == UNIT_FAILED)
set_put(u->manager->failed_units, u);
- else if (os == UNIT_FAILED && ns != UNIT_FAILED)
+ else
set_remove(u->manager->failed_units, u);
/* Make sure the cgroup is always removed when we become inactive */
if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) {
if (unit_has_name(u, SPECIAL_DBUS_SERVICE))
- /* The bus just might have become available,
+ /* The bus might have just become available,
* hence try to connect to it, if we aren't
* yet connected. */
bus_init(m, true);
manager_recheck_journal(m);
unit_trigger_notify(u);
- /* Maybe we finished startup and are now ready for being
- * stopped because unneeded? */
- if (u->manager->n_reloading <= 0)
+ if (u->manager->n_reloading <= 0) {
+ /* Maybe we finished startup and are now ready for
+ * being stopped because unneeded? */
unit_check_unneeded(u);
+ /* Maybe we finished startup, but something we needed
+ * has vanished? Let's die then. (This happens when
+ * something BindsTo= to a Type=oneshot unit, as these
+ * units go directly from starting to inactive,
+ * without ever entering started.) */
+ unit_check_binds_to(u);
+ }
+
unit_add_to_dbus_queue(u);
unit_add_to_gc_queue(u);
}
/* Watch a specific PID. We only support one or two units
* watching each PID for now, not more. */
- r = set_ensure_allocated(&u->pids, trivial_hash_func, trivial_compare_func);
+ r = set_ensure_allocated(&u->pids, NULL);
if (r < 0)
return r;
- r = hashmap_ensure_allocated(&u->manager->watch_pids1, trivial_hash_func, trivial_compare_func);
+ r = hashmap_ensure_allocated(&u->manager->watch_pids1, NULL);
if (r < 0)
return r;
r = hashmap_put(u->manager->watch_pids1, LONG_TO_PTR(pid), u);
if (r == -EEXIST) {
- r = hashmap_ensure_allocated(&u->manager->watch_pids2, trivial_hash_func, trivial_compare_func);
+ r = hashmap_ensure_allocated(&u->manager->watch_pids2, NULL);
if (r < 0)
return r;
}
}
+static int maybe_warn_about_dependency(const char *id, const char *other, UnitDependency dependency) {
+ assert(id);
+
+ switch (dependency) {
+ case UNIT_REQUIRES:
+ case UNIT_REQUIRES_OVERRIDABLE:
+ case UNIT_WANTS:
+ case UNIT_REQUISITE:
+ case UNIT_REQUISITE_OVERRIDABLE:
+ case UNIT_BINDS_TO:
+ case UNIT_PART_OF:
+ case UNIT_REQUIRED_BY:
+ case UNIT_REQUIRED_BY_OVERRIDABLE:
+ case UNIT_WANTED_BY:
+ case UNIT_BOUND_BY:
+ case UNIT_CONSISTS_OF:
+ case UNIT_REFERENCES:
+ case UNIT_REFERENCED_BY:
+ case UNIT_PROPAGATES_RELOAD_TO:
+ case UNIT_RELOAD_PROPAGATED_FROM:
+ case UNIT_JOINS_NAMESPACE_OF:
+ return 0;
+
+ case UNIT_CONFLICTS:
+ case UNIT_CONFLICTED_BY:
+ case UNIT_BEFORE:
+ case UNIT_AFTER:
+ case UNIT_ON_FAILURE:
+ case UNIT_TRIGGERS:
+ case UNIT_TRIGGERED_BY:
+ if (streq_ptr(id, other))
+ log_warning_unit(id, "Dependency %s=%s dropped from unit %s",
+ unit_dependency_to_string(dependency), id, other);
+ else
+ log_warning_unit(id, "Dependency %s=%s dropped from unit %s merged into %s",
+ unit_dependency_to_string(dependency), id,
+ strna(other), id);
+ return -EINVAL;
+
+ case _UNIT_DEPENDENCY_MAX:
+ case _UNIT_DEPENDENCY_INVALID:
+ break;
+ }
+
+ assert_not_reached("Invalid dependency type");
+}
+
int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference) {
static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = {
[UNIT_JOINS_NAMESPACE_OF] = UNIT_JOINS_NAMESPACE_OF,
};
int r, q = 0, v = 0, w = 0;
+ Unit *orig_u = u, *orig_other = other;
assert(u);
assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX);
/* We won't allow dependencies on ourselves. We will not
* consider them an error however. */
- if (u == other)
+ if (u == other) {
+ maybe_warn_about_dependency(orig_u->id, orig_other->id, d);
return 0;
+ }
- r = set_ensure_allocated(&u->dependencies[d], trivial_hash_func, trivial_compare_func);
+ r = set_ensure_allocated(&u->dependencies[d], NULL);
if (r < 0)
return r;
if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID) {
- r = set_ensure_allocated(&other->dependencies[inverse_table[d]], trivial_hash_func, trivial_compare_func);
+ r = set_ensure_allocated(&other->dependencies[inverse_table[d]], NULL);
if (r < 0)
return r;
}
if (add_reference) {
- r = set_ensure_allocated(&u->dependencies[UNIT_REFERENCES], trivial_hash_func, trivial_compare_func);
+ r = set_ensure_allocated(&u->dependencies[UNIT_REFERENCES], NULL);
if (r < 0)
return r;
- r = set_ensure_allocated(&other->dependencies[UNIT_REFERENCED_BY], trivial_hash_func, trivial_compare_func);
+ r = set_ensure_allocated(&other->dependencies[UNIT_REFERENCED_BY], NULL);
if (r < 0)
return r;
}
assert(u);
- if ((r = unit_add_dependency(u, d, other, add_reference)) < 0)
+ r = unit_add_dependency(u, d, other, add_reference);
+ if (r < 0)
return r;
- if ((r = unit_add_dependency(u, e, other, add_reference)) < 0)
+ r = unit_add_dependency(u, e, other, add_reference);
+ if (r < 0)
return r;
return 0;
}
int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) {
+ _cleanup_free_ char *s = NULL;
Unit *other;
int r;
- _cleanup_free_ char *s = NULL;
assert(u);
assert(name || path);
- if (!(name = resolve_template(u, name, path, &s)))
+ name = resolve_template(u, name, path, &s);
+ if (!name)
return -ENOMEM;
- if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0)
+ r = manager_load_unit(u->manager, name, path, NULL, &other);
+ if (r < 0)
return r;
- r = unit_add_two_dependencies(u, d, e, other, add_reference);
-
- return r;
+ return unit_add_two_dependencies(u, d, e, other, add_reference);
}
int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) {
assert(u);
assert(name || path);
- if (!(name = resolve_template(u, name, path, &s)))
+ name = resolve_template(u, name, path, &s);
+ if (!name)
return -ENOMEM;
- if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0)
+ r = manager_load_unit(u->manager, name, path, NULL, &other);
+ if (r < 0)
return r;
- r = unit_add_dependency(other, d, u, add_reference);
-
- return r;
+ return unit_add_dependency(other, d, u, add_reference);
}
int unit_add_two_dependencies_by_name_inverse(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) {
assert(u);
assert(name || path);
- if (!(name = resolve_template(u, name, path, &s)))
+ name = resolve_template(u, name, path, &s);
+ if (!name)
return -ENOMEM;
- if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0)
+ r = manager_load_unit(u->manager, name, path, NULL, &other);
+ if (r < 0)
return r;
- if ((r = unit_add_two_dependencies(other, d, e, u, add_reference)) < 0)
+ r = unit_add_two_dependencies(other, d, e, u, add_reference);
+ if (r < 0)
return r;
return r;
}
int set_unit_path(const char *p) {
- _cleanup_free_ char *c = NULL;
-
/* This is mostly for debug purposes */
- c = path_make_absolute_cwd(p);
- if (setenv("SYSTEMD_UNIT_PATH", c, 0) < 0)
+ if (setenv("SYSTEMD_UNIT_PATH", p, 0) < 0)
return -errno;
return 0;
Set *pid_set;
int r;
- pid_set = set_new(trivial_hash_func, trivial_compare_func);
+ pid_set = set_new(NULL);
if (!pid_set)
return NULL;
return *(ExecRuntime**) ((uint8_t*) u + offset);
}
-static int drop_in_file(Unit *u, UnitSetPropertiesMode mode, const char *name, char **_p, char **_q) {
- _cleanup_free_ char *b = NULL;
- char *p, *q;
- int r;
-
- assert(u);
- assert(name);
- assert(_p);
- assert(_q);
-
- b = xescape(name, "/.");
- if (!b)
- return -ENOMEM;
-
- if (!filename_is_safe(b))
- return -EINVAL;
-
+static int unit_drop_in_dir(Unit *u, UnitSetPropertiesMode mode, bool transient, char **dir) {
if (u->manager->running_as == SYSTEMD_USER) {
- _cleanup_free_ char *c = NULL;
+ int r;
+
+ if (mode == UNIT_PERSISTENT && !transient)
+ r = user_config_home(dir);
+ else
+ r = user_runtime_dir(dir);
- r = user_config_home(&c);
- if (r < 0)
- return r;
if (r == 0)
return -ENOENT;
+ return r;
+ }
- p = strjoin(c, "/", u->id, ".d", NULL);
- } else if (mode == UNIT_PERSISTENT && !u->transient)
- p = strjoin("/etc/systemd/system/", u->id, ".d", NULL);
+ if (mode == UNIT_PERSISTENT && !transient)
+ *dir = strdup("/etc/systemd/system");
else
- p = strjoin("/run/systemd/system/", u->id, ".d", NULL);
- if (!p)
+ *dir = strdup("/run/systemd/system");
+ if (!*dir)
return -ENOMEM;
- q = strjoin(p, "/90-", b, ".conf", NULL);
- if (!q) {
- free(p);
- return -ENOMEM;
- }
-
- *_p = p;
- *_q = q;
return 0;
}
+static int unit_drop_in_file(Unit *u,
+ UnitSetPropertiesMode mode, const char *name, char **p, char **q) {
+ _cleanup_free_ char *dir = NULL;
+ int r;
+
+ assert(u);
+
+ r = unit_drop_in_dir(u, mode, u->transient, &dir);
+ if (r < 0)
+ return r;
+
+ return drop_in_file(dir, u->id, 50, name, p, q);
+}
+
int unit_write_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) {
- _cleanup_free_ char *p = NULL, *q = NULL;
+
+ _cleanup_free_ char *dir = NULL;
int r;
assert(u);
- assert(name);
- assert(data);
if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME))
return 0;
- r = drop_in_file(u, mode, name, &p, &q);
+ r = unit_drop_in_dir(u, mode, u->transient, &dir);
if (r < 0)
return r;
- mkdir_p(p, 0755);
- return write_string_file_atomic_label(q, data);
+ return write_drop_in(dir, u->id, 50, name, data);
}
int unit_write_drop_in_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) {
if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME))
return 0;
- r = drop_in_file(u, mode, name, &p, &q);
+ r = unit_drop_in_file(u, mode, name, &p, &q);
if (r < 0)
return r;
if (u->manager->running_as == SYSTEMD_USER) {
_cleanup_free_ char *c = NULL;
- r = user_config_home(&c);
+ r = user_runtime_dir(&c);
if (r < 0)
return r;
if (r == 0)
char *q;
if (!u->manager->units_requiring_mounts_for) {
- u->manager->units_requiring_mounts_for = hashmap_new(string_hash_func, string_compare_func);
+ u->manager->units_requiring_mounts_for = hashmap_new(&string_hash_ops);
if (!u->manager->units_requiring_mounts_for)
return -ENOMEM;
}
if (!q)
return -ENOMEM;
- x = set_new(NULL, NULL);
+ x = set_new(NULL);
if (!x) {
free(q);
return -ENOMEM;
offset = UNIT_VTABLE(u)->exec_runtime_offset;
assert(offset > 0);
- /* Check if ther already is an ExecRuntime for this unit? */
+ /* Check if there already is an ExecRuntime for this unit? */
rt = (ExecRuntime**) ((uint8_t*) u + offset);
if (*rt)
return 0;
};
DEFINE_STRING_TABLE_LOOKUP(unit_active_state, UnitActiveState);
-
-static const char* const unit_dependency_table[_UNIT_DEPENDENCY_MAX] = {
- [UNIT_REQUIRES] = "Requires",
- [UNIT_REQUIRES_OVERRIDABLE] = "RequiresOverridable",
- [UNIT_REQUISITE] = "Requisite",
- [UNIT_REQUISITE_OVERRIDABLE] = "RequisiteOverridable",
- [UNIT_WANTS] = "Wants",
- [UNIT_BINDS_TO] = "BindsTo",
- [UNIT_PART_OF] = "PartOf",
- [UNIT_REQUIRED_BY] = "RequiredBy",
- [UNIT_REQUIRED_BY_OVERRIDABLE] = "RequiredByOverridable",
- [UNIT_WANTED_BY] = "WantedBy",
- [UNIT_BOUND_BY] = "BoundBy",
- [UNIT_CONSISTS_OF] = "ConsistsOf",
- [UNIT_CONFLICTS] = "Conflicts",
- [UNIT_CONFLICTED_BY] = "ConflictedBy",
- [UNIT_BEFORE] = "Before",
- [UNIT_AFTER] = "After",
- [UNIT_ON_FAILURE] = "OnFailure",
- [UNIT_TRIGGERS] = "Triggers",
- [UNIT_TRIGGERED_BY] = "TriggeredBy",
- [UNIT_PROPAGATES_RELOAD_TO] = "PropagatesReloadTo",
- [UNIT_RELOAD_PROPAGATED_FROM] = "ReloadPropagatedFrom",
- [UNIT_JOINS_NAMESPACE_OF] = "JoinsNamespaceOf",
- [UNIT_REFERENCES] = "References",
- [UNIT_REFERENCED_BY] = "ReferencedBy",
-};
-
-DEFINE_STRING_TABLE_LOOKUP(unit_dependency, UnitDependency);
~ianmdlvl / elogind.git / blobdiff