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-rw-r--r--src/core/unit.c404
1 files changed, 46 insertions, 358 deletions
diff --git a/src/core/unit.c b/src/core/unit.c
index f75045dc48..0dcf85b5e0 100644
--- a/src/core/unit.c
+++ b/src/core/unit.c
@@ -44,7 +44,6 @@
#include "special.h"
#include "cgroup-util.h"
#include "missing.h"
-#include "cgroup-attr.h"
#include "mkdir.h"
#include "label.h"
#include "fileio-label.h"
@@ -402,9 +401,10 @@ void unit_free(Unit *u) {
u->manager->n_in_gc_queue--;
}
- cgroup_bonding_free_list(u->cgroup_bondings, u->manager->n_reloading <= 0);
- cgroup_attribute_free_list(u->cgroup_attributes);
+ if (u->in_cgroup_queue)
+ LIST_REMOVE(Unit, cgroup_queue, u->manager->cgroup_queue, u);
+ free(u->cgroup_path);
free(u->description);
strv_free(u->documentation);
free(u->fragment_path);
@@ -673,7 +673,10 @@ void unit_dump(Unit *u, FILE *f, const char *prefix) {
"%s\tInactive Enter Timestamp: %s\n"
"%s\tGC Check Good: %s\n"
"%s\tNeed Daemon Reload: %s\n"
- "%s\tSlice: %s\n",
+ "%s\tSlice: %s\n"
+ "%s\tCGroup: %s\n"
+ "%s\tCGroup realized: %s\n"
+ "%s\tCGroup mask: 0x%x\n",
prefix, u->id,
prefix, unit_description(u),
prefix, strna(u->instance),
@@ -685,7 +688,10 @@ void unit_dump(Unit *u, FILE *f, const char *prefix) {
prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->inactive_enter_timestamp.realtime)),
prefix, yes_no(unit_check_gc(u)),
prefix, yes_no(unit_need_daemon_reload(u)),
- prefix, strna(unit_slice_name(u)));
+ prefix, strna(unit_slice_name(u)),
+ prefix, strna(u->cgroup_path),
+ prefix, yes_no(u->cgroup_realized),
+ prefix, u->cgroup_mask);
SET_FOREACH(t, u->names, i)
fprintf(f, "%s\tName: %s\n", prefix, t);
@@ -735,8 +741,6 @@ void unit_dump(Unit *u, FILE *f, const char *prefix) {
}
if (u->load_state == UNIT_LOADED) {
- CGroupBonding *b;
- CGroupAttribute *a;
fprintf(f,
"%s\tStopWhenUnneeded: %s\n"
@@ -754,20 +758,6 @@ void unit_dump(Unit *u, FILE *f, const char *prefix) {
prefix, yes_no(u->ignore_on_isolate),
prefix, yes_no(u->ignore_on_snapshot));
- LIST_FOREACH(by_unit, b, u->cgroup_bondings)
- fprintf(f, "%s\tControlGroup: %s:%s\n",
- prefix, b->controller, b->path);
-
- LIST_FOREACH(by_unit, a, u->cgroup_attributes) {
- _cleanup_free_ char *v = NULL;
-
- if (a->semantics && a->semantics->map_write)
- a->semantics->map_write(a->semantics, a->value, &v);
-
- fprintf(f, "%s\tControlGroupAttribute: %s %s \"%s\"\n",
- prefix, a->controller, a->name, v ? v : a->value);
- }
-
if (UNIT_VTABLE(u)->dump)
UNIT_VTABLE(u)->dump(u, f, prefix2);
@@ -795,14 +785,16 @@ int unit_load_fragment_and_dropin(Unit *u) {
assert(u);
/* Load a .service file */
- if ((r = unit_load_fragment(u)) < 0)
+ r = unit_load_fragment(u);
+ if (r < 0)
return r;
if (u->load_state == UNIT_STUB)
return -ENOENT;
/* Load drop-in directory data */
- if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
+ r = unit_load_dropin(unit_follow_merge(u));
+ if (r < 0)
return r;
return 0;
@@ -818,14 +810,16 @@ int unit_load_fragment_and_dropin_optional(Unit *u) {
* something can be loaded or not doesn't matter. */
/* Load a .service file */
- if ((r = unit_load_fragment(u)) < 0)
+ r = unit_load_fragment(u);
+ if (r < 0)
return r;
if (u->load_state == UNIT_STUB)
u->load_state = UNIT_LOADED;
/* Load drop-in directory data */
- if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
+ r = unit_load_dropin(unit_follow_merge(u));
+ if (r < 0)
return r;
return 0;
@@ -880,8 +874,12 @@ static int unit_add_default_dependencies(Unit *u) {
return r;
}
- if (u->default_dependencies && UNIT_ISSET(u->slice)) {
- r = unit_add_two_dependencies(u, UNIT_AFTER, UNIT_WANTS, UNIT_DEREF(u->slice), true);
+ if (u->default_dependencies && unit_get_cgroup_context(u)) {
+ if (UNIT_ISSET(u->slice))
+ r = unit_add_two_dependencies(u, UNIT_AFTER, UNIT_WANTS, UNIT_DEREF(u->slice), true);
+ else
+ r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, SPECIAL_ROOT_SLICE, NULL, true);
+
if (r < 0)
return r;
}
@@ -1382,7 +1380,7 @@ void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_su
}
if (UNIT_IS_INACTIVE_OR_FAILED(ns))
- cgroup_bonding_trim_list(u->cgroup_bondings, true);
+ unit_destroy_cgroup(u);
if (UNIT_IS_INACTIVE_OR_FAILED(os) != UNIT_IS_INACTIVE_OR_FAILED(ns)) {
ExecContext *ec = unit_get_exec_context(u);
@@ -1952,51 +1950,16 @@ char *unit_dbus_path(Unit *u) {
return unit_dbus_path_from_name(u->id);
}
-static int unit_add_cgroup(Unit *u, CGroupBonding *b) {
- int r;
-
- assert(u);
- assert(b);
-
- assert(b->path);
-
- if (!b->controller) {
- b->controller = strdup(SYSTEMD_CGROUP_CONTROLLER);
- if (!b->controller)
- return log_oom();
-
- b->ours = true;
- }
-
- /* Ensure this hasn't been added yet */
- assert(!b->unit);
-
- if (streq(b->controller, SYSTEMD_CGROUP_CONTROLLER)) {
- CGroupBonding *l;
-
- l = hashmap_get(u->manager->cgroup_bondings, b->path);
- LIST_PREPEND(CGroupBonding, by_path, l, b);
-
- r = hashmap_replace(u->manager->cgroup_bondings, b->path, l);
- if (r < 0) {
- LIST_REMOVE(CGroupBonding, by_path, l, b);
- return r;
- }
- }
-
- LIST_PREPEND(CGroupBonding, by_unit, u->cgroup_bondings, b);
- b->unit = u;
-
- return 0;
-}
-
char *unit_default_cgroup_path(Unit *u) {
_cleanup_free_ char *escaped_instance = NULL, *slice = NULL;
int r;
assert(u);
- if (UNIT_ISSET(u->slice)) {
+ if (unit_has_name(u, SPECIAL_ROOT_SLICE))
+ return strdup(u->manager->cgroup_root);
+
+ if (UNIT_ISSET(u->slice) && !unit_has_name(UNIT_DEREF(u->slice), SPECIAL_ROOT_SLICE)) {
r = cg_slice_to_path(UNIT_DEREF(u->slice)->id, &slice);
if (r < 0)
return NULL;
@@ -2026,148 +1989,6 @@ char *unit_default_cgroup_path(Unit *u) {
escaped_instance, NULL);
}
-int unit_add_cgroup_from_text(Unit *u, const char *name, bool overwrite, CGroupBonding **ret) {
- char *controller = NULL, *path = NULL;
- CGroupBonding *b = NULL;
- bool ours = false;
- int r;
-
- assert(u);
- assert(name);
-
- r = cg_split_spec(name, &controller, &path);
- if (r < 0)
- return r;
-
- if (!path) {
- path = unit_default_cgroup_path(u);
- ours = true;
- }
-
- if (!controller) {
- controller = strdup("systemd");
- ours = true;
- }
-
- if (!path || !controller) {
- free(path);
- free(controller);
- return log_oom();
- }
-
- if (streq(controller, "systemd")) {
- /* Within the systemd unit hierarchy we do not allow changes. */
- if (path_startswith(path, "/system")) {
- log_warning_unit(u->id, "Manipulating the systemd:/system cgroup hierarchy is not permitted.");
- free(path);
- free(controller);
- return -EPERM;
- }
- }
-
- b = cgroup_bonding_find_list(u->cgroup_bondings, controller);
- if (b) {
- if (streq(path, b->path)) {
- free(path);
- free(controller);
-
- if (ret)
- *ret = b;
- return 0;
- }
-
- if (overwrite && !b->essential) {
- free(controller);
-
- free(b->path);
- b->path = path;
-
- b->ours = ours;
- b->realized = false;
-
- if (ret)
- *ret = b;
-
- return 1;
- }
-
- r = -EEXIST;
- b = NULL;
- goto fail;
- }
-
- b = new0(CGroupBonding, 1);
- if (!b) {
- r = -ENOMEM;
- goto fail;
- }
-
- b->controller = controller;
- b->path = path;
- b->ours = ours;
- b->essential = streq(controller, SYSTEMD_CGROUP_CONTROLLER);
-
- r = unit_add_cgroup(u, b);
- if (r < 0)
- goto fail;
-
- if (ret)
- *ret = b;
-
- return 1;
-
-fail:
- free(path);
- free(controller);
- free(b);
-
- return r;
-}
-
-static int unit_add_one_default_cgroup(Unit *u, const char *controller) {
- CGroupBonding *b = NULL;
- int r = -ENOMEM;
-
- assert(u);
-
- if (controller && !cg_controller_is_valid(controller, true))
- return -EINVAL;
-
- if (!controller)
- controller = SYSTEMD_CGROUP_CONTROLLER;
-
- if (cgroup_bonding_find_list(u->cgroup_bondings, controller))
- return 0;
-
- b = new0(CGroupBonding, 1);
- if (!b)
- return -ENOMEM;
-
- b->controller = strdup(controller);
- if (!b->controller)
- goto fail;
-
- b->path = unit_default_cgroup_path(u);
- if (!b->path)
- goto fail;
-
- b->ours = true;
- b->essential = streq(controller, SYSTEMD_CGROUP_CONTROLLER);
-
- r = unit_add_cgroup(u, b);
- if (r < 0)
- goto fail;
-
- return 1;
-
-fail:
- free(b->path);
- free(b->controller);
- free(b);
-
- return r;
-}
-
int unit_add_default_slice(Unit *u) {
Unit *slice;
int r;
@@ -2177,10 +1998,10 @@ int unit_add_default_slice(Unit *u) {
if (UNIT_ISSET(u->slice))
return 0;
- if (u->manager->running_as != SYSTEMD_SYSTEM)
+ if (!unit_get_cgroup_context(u))
return 0;
- r = manager_load_unit(u->manager, SPECIAL_SYSTEM_SLICE, NULL, NULL, &slice);
+ r = manager_load_unit(u->manager, u->manager->running_as == SYSTEMD_SYSTEM ? SPECIAL_SYSTEM_SLICE : SPECIAL_ROOT_SLICE, NULL, NULL, &slice);
if (r < 0)
return r;
@@ -2197,148 +2018,6 @@ const char *unit_slice_name(Unit *u) {
return UNIT_DEREF(u->slice)->id;
}
-int unit_add_default_cgroups(Unit *u) {
- CGroupAttribute *a;
- char **c;
- int r;
-
- assert(u);
-
- /* Adds in the default cgroups, if they weren't specified
- * otherwise. */
-
- if (!u->manager->cgroup_root)
- return 0;
-
- r = unit_add_one_default_cgroup(u, NULL);
- if (r < 0)
- return r;
-
- STRV_FOREACH(c, u->manager->default_controllers)
- unit_add_one_default_cgroup(u, *c);
-
- LIST_FOREACH(by_unit, a, u->cgroup_attributes)
- unit_add_one_default_cgroup(u, a->controller);
-
- return 0;
-}
-
-CGroupBonding* unit_get_default_cgroup(Unit *u) {
- assert(u);
-
- return cgroup_bonding_find_list(u->cgroup_bondings, NULL);
-}
-
-int unit_add_cgroup_attribute(
- Unit *u,
- const CGroupSemantics *semantics,
- const char *controller,
- const char *name,
- const char *value,
- CGroupAttribute **ret) {
-
- _cleanup_free_ char *c = NULL;
- CGroupAttribute *a;
- int r;
-
- assert(u);
- assert(value);
-
- if (semantics) {
- /* Semantics always take precedence */
- if (semantics->name)
- name = semantics->name;
-
- if (semantics->controller)
- controller = semantics->controller;
- }
-
- if (!name)
- return -EINVAL;
-
- if (!controller) {
- r = cg_controller_from_attr(name, &c);
- if (r < 0)
- return -EINVAL;
-
- controller = c;
- }
-
- if (!controller ||
- streq(controller, SYSTEMD_CGROUP_CONTROLLER) ||
- streq(controller, "systemd"))
- return -EINVAL;
-
- if (!filename_is_safe(name))
- return -EINVAL;
-
- if (!cg_controller_is_valid(controller, false))
- return -EINVAL;
-
- /* Check if this attribute already exists. Note that we will
- * explicitly check for the value here too, as there are
- * attributes which accept multiple values. */
- a = cgroup_attribute_find_list(u->cgroup_attributes, controller, name);
- if (a) {
- if (streq(value, a->value)) {
- /* Exactly the same value is always OK, let's ignore this */
- if (ret)
- *ret = a;
-
- return 0;
- }
-
- if (semantics && !semantics->multiple) {
- char *v;
-
- /* If this is a single-item entry, we can
- * simply patch the existing attribute */
-
- v = strdup(value);
- if (!v)
- return -ENOMEM;
-
- free(a->value);
- a->value = v;
-
- if (ret)
- *ret = a;
- return 1;
- }
- }
-
- a = new0(CGroupAttribute, 1);
- if (!a)
- return -ENOMEM;
-
- if (c) {
- a->controller = c;
- c = NULL;
- } else
- a->controller = strdup(controller);
-
- a->name = strdup(name);
- a->value = strdup(value);
-
- if (!a->controller || !a->name || !a->value) {
- free(a->controller);
- free(a->name);
- free(a->value);
- free(a);
- return -ENOMEM;
- }
-
- a->semantics = semantics;
- a->unit = u;
-
- LIST_PREPEND(CGroupAttribute, by_unit, u->cgroup_attributes, a);
-
- if (ret)
- *ret = a;
-
- return 1;
-}
-
int unit_load_related_unit(Unit *u, const char *type, Unit **_found) {
_cleanup_free_ char *t = NULL;
int r;
@@ -2804,7 +2483,7 @@ int unit_kill_common(
if (kill(main_pid, signo) < 0)
r = -errno;
- if (who == KILL_ALL) {
+ if (who == KILL_ALL && u->cgroup_path) {
_cleanup_set_free_ Set *pid_set = NULL;
int q;
@@ -2825,7 +2504,7 @@ int unit_kill_common(
return q;
}
- q = cgroup_bonding_kill_list(u->cgroup_bondings, signo, false, false, pid_set, NULL);
+ q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, false, true, false, pid_set);
if (q < 0 && q != -EAGAIN && q != -ESRCH && q != -ENOENT)
r = q;
}
@@ -2924,7 +2603,6 @@ int unit_exec_context_defaults(Unit *u, ExecContext *c) {
assert(c);
/* This only copies in the ones that need memory */
-
for (i = 0; i < RLIMIT_NLIMITS; i++)
if (u->manager->rlimit[i] && !c->rlimit[i]) {
c->rlimit[i] = newdup(struct rlimit, u->manager->rlimit[i], 1);
@@ -2954,6 +2632,16 @@ ExecContext *unit_get_exec_context(Unit *u) {
return (ExecContext*) ((uint8_t*) u + offset);
}
+CGroupContext *unit_get_cgroup_context(Unit *u) {
+ size_t offset;
+
+ offset = UNIT_VTABLE(u)->cgroup_context_offset;
+ if (offset <= 0)
+ return NULL;
+
+ return (CGroupContext*) ((uint8_t*) u + offset);
+}
+
static int drop_in_file(Unit *u, bool runtime, const char *name, char **_p, char **_q) {
char *p, *q;
int r;
@@ -3072,7 +2760,7 @@ int unit_kill_context(
wait_for_exit = true;
}
- if (c->kill_mode == KILL_CONTROL_GROUP) {
+ if (c->kill_mode == KILL_CONTROL_GROUP && u->cgroup_path) {
_cleanup_set_free_ Set *pid_set = NULL;
pid_set = set_new(trivial_hash_func, trivial_compare_func);
@@ -3092,7 +2780,7 @@ int unit_kill_context(
return r;
}
- r = cgroup_bonding_kill_list(u->cgroup_bondings, sig, true, false, pid_set, NULL);
+ r = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, sig, true, true, false, pid_set);
if (r < 0) {
if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
log_warning_unit(u->id, "Failed to kill control group: %s", strerror(-r));
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-07-03 17:15:50 +0000