chiark / gitweb /
swap: handle nofail/noauto in core
[elogind.git] / src / core / swap.c
index 61ce8316c251069a8ebb9ba16858612879174b2a..57d15eb34bd62f504f4b4c84f3c073d629bb1bc0 100644 (file)
@@ -92,6 +92,7 @@ static void swap_init(Unit *u) {
         s->exec_context.std_output = u->manager->default_std_output;
         s->exec_context.std_error = u->manager->default_std_error;
         kill_context_init(&s->kill_context);
+        cgroup_context_init(&s->cgroup_context);
 
         s->parameters_proc_swaps.priority = s->parameters_fragment.priority = -1;
 
@@ -125,10 +126,12 @@ static void swap_done(Unit *u) {
         free(s->parameters_fragment.what);
         s->parameters_fragment.what = NULL;
 
-        exec_context_done(&s->exec_context);
+        exec_context_done(&s->exec_context, manager_is_reloading_or_reexecuting(u->manager));
         exec_command_done_array(s->exec_command, _SWAP_EXEC_COMMAND_MAX);
         s->control_command = NULL;
 
+        cgroup_context_done(&s->cgroup_context);
+
         swap_unwatch_control_pid(s);
 
         unit_unwatch_timer(u, &s->timer_watch);
@@ -184,8 +187,7 @@ static int swap_add_device_links(Swap *s) {
                 return 0;
 
         if (is_device_path(s->what))
-                return unit_add_node_link(UNIT(s), s->what,
-                                          !p->noauto && p->nofail &&
+                return unit_add_node_link(UNIT(s), s->what, !p->noauto &&
                                           UNIT(s)->manager->running_as == SYSTEMD_SYSTEM);
         else
                 /* File based swap devices need to be ordered after
@@ -195,6 +197,7 @@ static int swap_add_device_links(Swap *s) {
 }
 
 static int swap_add_default_dependencies(Swap *s) {
+        bool nofail = false, noauto = false;
         int r;
 
         assert(s);
@@ -209,12 +212,26 @@ static int swap_add_default_dependencies(Swap *s) {
         if (r < 0)
                 return r;
 
+        if (s->from_fragment) {
+                SwapParameters *p = &s->parameters_fragment;
+
+                nofail = p->nofail;
+                noauto = p->noauto;
+        }
+
+        if (!noauto) {
+                r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, (nofail ? UNIT_WANTED_BY : UNIT_REQUIRED_BY),
+                                                      SPECIAL_SWAP_TARGET, NULL, true);
+                if (r < 0)
+                        return r;
+        }
+
         return 0;
 }
 
 static int swap_verify(Swap *s) {
         bool b;
-        char _cleanup_free_ *e = NULL;
+        _cleanup_free_ char *e = NULL;
 
         if (UNIT(s)->load_state != UNIT_LOADED)
                   return 0;
@@ -287,7 +304,7 @@ static int swap_load(Unit *u) {
                 if (r < 0)
                         return r;
 
-                r = unit_add_default_cgroups(u);
+                r = unit_add_default_slice(u);
                 if (r < 0)
                         return r;
 
@@ -315,7 +332,7 @@ static int swap_add_one(
                 bool set_flags) {
 
         Unit *u = NULL;
-        char _cleanup_free_ *e = NULL;
+        _cleanup_free_ char *e = NULL;
         char *wp = NULL;
         bool delete = false;
         int r;
@@ -589,6 +606,8 @@ static int swap_spawn(Swap *s, ExecCommand *c, pid_t *_pid) {
         assert(c);
         assert(_pid);
 
+        unit_realize_cgroup(UNIT(s));
+
         r = unit_watch_timer(UNIT(s), CLOCK_MONOTONIC, true, s->timeout_usec, &s->timer_watch);
         if (r < 0)
                 goto fail;
@@ -602,9 +621,8 @@ static int swap_spawn(Swap *s, ExecCommand *c, pid_t *_pid) {
                        true,
                        true,
                        UNIT(s)->manager->confirm_spawn,
-                       UNIT(s)->cgroup_bondings,
-                       UNIT(s)->cgroup_attributes,
-                       NULL,
+                       UNIT(s)->cgroup_mask,
+                       UNIT(s)->cgroup_path,
                        UNIT(s)->id,
                        NULL,
                        &pid);
@@ -632,6 +650,7 @@ static void swap_enter_dead(Swap *s, SwapResult f) {
         if (f != SWAP_SUCCESS)
                 s->result = f;
 
+        exec_context_tmp_dirs_done(&s->exec_context);
         swap_set_state(s, s->result != SWAP_SUCCESS ? SWAP_FAILED : SWAP_DEAD);
 }
 
@@ -831,6 +850,8 @@ static int swap_serialize(Unit *u, FILE *f, FDSet *fds) {
         if (s->control_command_id >= 0)
                 unit_serialize_item(u, f, "control-command", swap_exec_command_to_string(s->control_command_id));
 
+        exec_context_serialize(&s->exec_context, UNIT(s), f);
+
         return 0;
 }
 
@@ -874,26 +895,41 @@ static int swap_deserialize_item(Unit *u, const char *key, const char *value, FD
                         s->control_command_id = id;
                         s->control_command = s->exec_command + id;
                 }
+        } else if (streq(key, "tmp-dir")) {
+                char *t;
+
+                t = strdup(value);
+                if (!t)
+                        return log_oom();
 
+                s->exec_context.tmp_dir = t;
+        } else if (streq(key, "var-tmp-dir")) {
+                char *t;
+
+                t = strdup(value);
+                if (!t)
+                        return log_oom();
+
+                s->exec_context.var_tmp_dir = t;
         } else
                 log_debug_unit(u->id, "Unknown serialization key '%s'", key);
 
         return 0;
 }
 
-static UnitActiveState swap_active_state(Unit *u) {
+_pure_ static UnitActiveState swap_active_state(Unit *u) {
         assert(u);
 
         return state_translation_table[SWAP(u)->state];
 }
 
-static const char *swap_sub_state_to_string(Unit *u) {
+_pure_ static const char *swap_sub_state_to_string(Unit *u) {
         assert(u);
 
         return swap_state_to_string(SWAP(u)->state);
 }
 
-static bool swap_check_gc(Unit *u) {
+_pure_ static bool swap_check_gc(Unit *u) {
         Swap *s = SWAP(u);
 
         assert(s);
@@ -1224,10 +1260,14 @@ static void swap_shutdown(Manager *m) {
 
 static int swap_enumerate(Manager *m) {
         int r;
-        struct epoll_event ev;
         assert(m);
 
         if (!m->proc_swaps) {
+                struct epoll_event ev = {
+                        .events = EPOLLPRI,
+                        .data.ptr = &m->swap_watch,
+                };
+
                 m->proc_swaps = fopen("/proc/swaps", "re");
                 if (!m->proc_swaps)
                         return (errno == ENOENT) ? 0 : -errno;
@@ -1235,10 +1275,6 @@ static int swap_enumerate(Manager *m) {
                 m->swap_watch.type = WATCH_SWAP;
                 m->swap_watch.fd = fileno(m->proc_swaps);
 
-                zero(ev);
-                ev.events = EPOLLPRI;
-                ev.data.ptr = &m->swap_watch;
-
                 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->swap_watch.fd, &ev) < 0)
                         return -errno;
         }
@@ -1262,53 +1298,7 @@ static void swap_reset_failed(Unit *u) {
 }
 
 static int swap_kill(Unit *u, KillWho who, int signo, DBusError *error) {
-        Swap *s = SWAP(u);
-        int r = 0;
-        Set *pid_set = NULL;
-
-        assert(s);
-
-        if (who == KILL_MAIN) {
-                dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Swap units have no main processes");
-                return -ESRCH;
-        }
-
-        if (s->control_pid <= 0 && who == KILL_CONTROL) {
-                dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
-                return -ESRCH;
-        }
-
-        if (who == KILL_CONTROL || who == KILL_ALL)
-                if (s->control_pid > 0)
-                        if (kill(s->control_pid, signo) < 0)
-                                r = -errno;
-
-        if (who == KILL_ALL) {
-                int q;
-
-                pid_set = set_new(trivial_hash_func, trivial_compare_func);
-                if (!pid_set)
-                        return -ENOMEM;
-
-                /* Exclude the control pid from being killed via the cgroup */
-                if (s->control_pid > 0) {
-                        q = set_put(pid_set, LONG_TO_PTR(s->control_pid));
-                        if (q < 0) {
-                                r = q;
-                                goto finish;
-                        }
-                }
-
-                q = cgroup_bonding_kill_list(UNIT(s)->cgroup_bondings, signo, false, false, pid_set, NULL);
-                if (q < 0 && q != -EAGAIN && q != -ESRCH && q != -ENOENT)
-                        r = q;
-        }
-
-finish:
-        if (pid_set)
-                set_free(pid_set);
-
-        return r;
+        return unit_kill_common(u, who, signo, -1, SWAP(u)->control_pid, error);
 }
 
 static const char* const swap_state_table[_SWAP_STATE_MAX] = {
@@ -1351,8 +1341,9 @@ const UnitVTable swap_vtable = {
                 "Swap\0"
                 "Install\0",
 
+        .private_section = "Swap",
         .exec_context_offset = offsetof(Swap, exec_context),
-        .exec_section = "Swap",
+        .cgroup_context_offset = offsetof(Swap, cgroup_context),
 
         .no_alias = true,
         .no_instances = true,
@@ -1386,6 +1377,8 @@ const UnitVTable swap_vtable = {
         .bus_interface = "org.freedesktop.systemd1.Swap",
         .bus_message_handler = bus_swap_message_handler,
         .bus_invalidating_properties =  bus_swap_invalidating_properties,
+        .bus_set_property = bus_swap_set_property,
+        .bus_commit_properties = bus_swap_commit_properties,
 
         .following = swap_following,
         .following_set = swap_following_set,