core: in containers, don't wait for cgroup empty notifications which will never come

[elogind.git] / src / core / unit.c

diff --git a/src/core/unit.c b/src/core/unit.c
index e3b620603cf2c489ba10e5063a7e923a8bd5d2ee..78d7b534b2719c278dd86c85ff70649ba87c4588 100644 (file)
--- a/src/core/unit.c
+++ b/src/core/unit.c
@@ -50,6 +50,7 @@
 #include "bus-errors.h"
 #include "dbus.h"
 #include "execute.h"
+#include "virt.h"
 
 const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = {
         [UNIT_SERVICE] = &service_vtable,
@@ -671,6 +672,18 @@ int unit_add_exec_dependencies(Unit *u, ExecContext *c) {
         assert(u);
         assert(c);
 
+        if (c->working_directory) {
+                r = unit_require_mounts_for(u, c->working_directory);
+                if (r < 0)
+                        return r;
+        }
+
+        if (c->root_directory) {
+                r = unit_require_mounts_for(u, c->root_directory);
+                if (r < 0)
+                        return r;
+        }
+
         if (c->std_output != EXEC_OUTPUT_KMSG &&
             c->std_output != EXEC_OUTPUT_SYSLOG &&
             c->std_output != EXEC_OUTPUT_JOURNAL &&
@@ -2909,7 +2922,7 @@ int unit_kill_context(
                 pid_t control_pid,
                 bool main_pid_alien) {
 
-        int sig, wait_for_exit = 0, r;
+        int sig, wait_for_exit = false, r;
 
         assert(u);
         assert(c);
@@ -2926,10 +2939,10 @@ int unit_kill_context(
                         _cleanup_free_ char *comm = NULL;
                         get_process_comm(main_pid, &comm);
 
-                        log_warning_unit(u->id, "Failed to kill main process %li (%s): %s",
-                                         (long) main_pid, strna(comm), strerror(-r));
+                        log_warning_unit(u->id, "Failed to kill main process " PID_FMT " (%s): %s", main_pid, strna(comm), strerror(-r));
                 } else {
-                        wait_for_exit = !main_pid_alien;
+                        if (!main_pid_alien)
+                                wait_for_exit = true;
 
                         if (c->send_sighup)
                                 kill(main_pid, SIGHUP);
@@ -2943,9 +2956,7 @@ int unit_kill_context(
                         _cleanup_free_ char *comm = NULL;
                         get_process_comm(control_pid, &comm);
 
-                        log_warning_unit(u->id,
-                                         "Failed to kill control process %li (%s): %s",
-                                         (long) control_pid, strna(comm), strerror(-r));
+                        log_warning_unit(u->id, "Failed to kill control process " PID_FMT " (%s): %s", control_pid, strna(comm), strerror(-r));
                 } else {
                         wait_for_exit = true;
 
@@ -2954,7 +2965,7 @@ int unit_kill_context(
                 }
         }
 
-        if (c->kill_mode == KILL_CONTROL_GROUP && u->cgroup_path) {
+        if ((c->kill_mode == KILL_CONTROL_GROUP || (c->kill_mode == KILL_MIXED && sigkill)) && u->cgroup_path) {
                 _cleanup_set_free_ Set *pid_set = NULL;
 
                 /* Exclude the main/control pids from being killed via the cgroup */
@@ -2967,7 +2978,17 @@ int unit_kill_context(
                         if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
                                 log_warning_unit(u->id, "Failed to kill control group: %s", strerror(-r));
                 } else if (r > 0) {
-                        wait_for_exit = true;
+
+                        /* FIXME: Now, this is a terrible hack: in
+                         * containers cgroup empty notifications don't
+                         * work. Hence we'll not wait for them to run
+                         * empty for now, since there is no way to
+                         * detect when a service ends with no main PID
+                         * known... */
+
+                        if (detect_container(NULL) <= 0)
+                                wait_for_exit = true;
+
                         if (c->send_sighup) {
                                 set_free(pid_set);
 
@@ -2997,17 +3018,15 @@ int unit_require_mounts_for(Unit *u, const char *path) {
          * units can easily determine which units to make themselves a
          * dependency of. */
 
+        if (!path_is_absolute(path))
+                return -EINVAL;
+
         p = strdup(path);
         if (!p)
                 return -ENOMEM;
 
         path_kill_slashes(p);
 
-        if (!path_is_absolute(p)) {
-                free(p);
-                return -EINVAL;
-        }
-
         if (!path_is_safe(p)) {
                 free(p);
                 return -EPERM;