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https://github.com/systemd/systemd-stable.git
synced 2025-01-26 10:03:40 +03:00
cgroup: drop "ignore_self" argument from cg_is_empty()
In all cases where the function (or cg_is_empty_recursive()) ignoring the calling process is actually wrong, as a process keeps a cgroup busy regardless if its the current one or another. Hence, let's simplify things and drop the "ignore_self" parameter.
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e155a0aa04
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6f883237f1
@ -891,49 +891,42 @@ int cg_uninstall_release_agent(const char *controller) {
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return 0;
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}
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int cg_is_empty(const char *controller, const char *path, bool ignore_self) {
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int cg_is_empty(const char *controller, const char *path) {
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_cleanup_fclose_ FILE *f = NULL;
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pid_t pid = 0, self_pid;
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bool found = false;
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pid_t pid = 0;
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int r;
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assert(path);
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r = cg_enumerate_processes(controller, path, &f);
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if (r < 0)
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return r == -ENOENT ? 1 : r;
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self_pid = getpid();
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while ((r = cg_read_pid(f, &pid)) > 0) {
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if (ignore_self && pid == self_pid)
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continue;
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found = true;
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break;
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}
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if (r == -ENOENT)
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return 1;
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if (r < 0)
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return r;
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return !found;
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r = cg_read_pid(f, &pid);
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if (r < 0)
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return r;
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return r == 0;
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}
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int cg_is_empty_recursive(const char *controller, const char *path, bool ignore_self) {
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int cg_is_empty_recursive(const char *controller, const char *path) {
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_cleanup_closedir_ DIR *d = NULL;
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char *fn;
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int r;
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assert(path);
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r = cg_is_empty(controller, path, ignore_self);
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r = cg_is_empty(controller, path);
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if (r <= 0)
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return r;
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r = cg_enumerate_subgroups(controller, path, &d);
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if (r == -ENOENT)
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return 1;
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if (r < 0)
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return r == -ENOENT ? 1 : r;
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return r;
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while ((r = cg_read_subgroup(d, &fn)) > 0) {
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_cleanup_free_ char *p = NULL;
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@ -943,7 +936,7 @@ int cg_is_empty_recursive(const char *controller, const char *path, bool ignore_
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if (!p)
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return -ENOMEM;
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r = cg_is_empty_recursive(controller, p, ignore_self);
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r = cg_is_empty_recursive(controller, p);
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if (r <= 0)
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return r;
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}
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@ -93,8 +93,8 @@ int cg_set_task_access(const char *controller, const char *path, mode_t mode, ui
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int cg_install_release_agent(const char *controller, const char *agent);
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int cg_uninstall_release_agent(const char *controller);
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int cg_is_empty(const char *controller, const char *path, bool ignore_self);
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int cg_is_empty_recursive(const char *controller, const char *path, bool ignore_self);
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int cg_is_empty(const char *controller, const char *path);
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int cg_is_empty_recursive(const char *controller, const char *path);
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int cg_get_root_path(char **path);
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@ -1030,7 +1030,7 @@ int manager_notify_cgroup_empty(Manager *m, const char *cgroup) {
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if (!u)
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return 0;
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r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, true);
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r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path);
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if (r <= 0)
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return r;
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@ -396,7 +396,7 @@ static bool scope_check_gc(Unit *u) {
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if (u->cgroup_path) {
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int r;
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r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, true);
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r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path);
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if (r <= 0)
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return true;
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}
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@ -1269,7 +1269,7 @@ static int cgroup_good(Service *s) {
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if (!UNIT(s)->cgroup_path)
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return 0;
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r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, UNIT(s)->cgroup_path, true);
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r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, UNIT(s)->cgroup_path);
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if (r < 0)
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return r;
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@ -263,7 +263,7 @@ static int show_unit_cgroup(sd_bus *bus, const char *interface, const char *unit
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if (isempty(cgroup))
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return 0;
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if (cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, cgroup, false) != 0 && leader <= 0)
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if (cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, cgroup) != 0 && leader <= 0)
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return 0;
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c = columns();
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@ -375,7 +375,7 @@ static int show_unit_cgroup(sd_bus *bus, const char *unit, pid_t leader) {
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if (r < 0)
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return bus_log_parse_error(r);
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if (cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, cgroup, false) != 0 && leader <= 0)
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if (cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, cgroup) != 0 && leader <= 0)
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return 0;
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c = columns();
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@ -152,7 +152,7 @@ int show_cgroup_by_path(const char *path, const char *prefix, unsigned n_columns
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if (!k)
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return -ENOMEM;
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if (!(flags & OUTPUT_SHOW_ALL) && cg_is_empty_recursive(NULL, k, false) > 0)
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if (!(flags & OUTPUT_SHOW_ALL) && cg_is_empty_recursive(NULL, k) > 0)
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continue;
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if (!shown_pids) {
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@ -3557,7 +3557,7 @@ static void print_status_info(
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if (i->control_group &&
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(i->main_pid > 0 || i->control_pid > 0 ||
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((arg_transport != BUS_TRANSPORT_LOCAL && arg_transport != BUS_TRANSPORT_MACHINE) || cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, i->control_group, false) == 0))) {
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((arg_transport != BUS_TRANSPORT_LOCAL && arg_transport != BUS_TRANSPORT_MACHINE) || cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, i->control_group) == 0))) {
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unsigned c;
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printf(" CGroup: %s\n", i->control_group);
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@ -56,18 +56,18 @@ int main(int argc, char*argv[]) {
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assert_se(path_equal(path, "/sys/fs/cgroup/systemd/test-b/test-d"));
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free(path);
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assert_se(cg_is_empty(SYSTEMD_CGROUP_CONTROLLER, "/test-a", false) > 0);
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assert_se(cg_is_empty(SYSTEMD_CGROUP_CONTROLLER, "/test-b", false) > 0);
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assert_se(cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, "/test-a", false) > 0);
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assert_se(cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, "/test-b", false) == 0);
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assert_se(cg_is_empty(SYSTEMD_CGROUP_CONTROLLER, "/test-a") > 0);
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assert_se(cg_is_empty(SYSTEMD_CGROUP_CONTROLLER, "/test-b") > 0);
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assert_se(cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, "/test-a") > 0);
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assert_se(cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, "/test-b") == 0);
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assert_se(cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, "/test-a", 0, false, false, false, NULL) == 0);
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assert_se(cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, "/test-b", 0, false, false, false, NULL) > 0);
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assert_se(cg_migrate_recursive(SYSTEMD_CGROUP_CONTROLLER, "/test-b", SYSTEMD_CGROUP_CONTROLLER, "/test-a", false, false) > 0);
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assert_se(cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, "/test-a", false) == 0);
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assert_se(cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, "/test-b", false) > 0);
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assert_se(cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, "/test-a") == 0);
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assert_se(cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, "/test-b") > 0);
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assert_se(cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, "/test-a", 0, false, false, false, NULL) > 0);
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assert_se(cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, "/test-b", 0, false, false, false, NULL) == 0);
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