chiark / gitweb /
gc: remove a lot of unused code
[elogind.git] / src / mount.c
index b49c64aeabc7b287c171cc8bf45fcc7b4d7f36fa..38547f7294df3a23e9b23fa2253b925deb2415de 100644 (file)
@@ -42,15 +42,15 @@ static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = {
         [MOUNT_MOUNTING] = UNIT_ACTIVATING,
         [MOUNT_MOUNTING_DONE] = UNIT_ACTIVE,
         [MOUNT_MOUNTED] = UNIT_ACTIVE,
-        [MOUNT_REMOUNTING] = UNIT_ACTIVE_RELOADING,
+        [MOUNT_REMOUNTING] = UNIT_RELOADING,
         [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING,
         [MOUNT_MOUNTING_SIGTERM] = UNIT_DEACTIVATING,
         [MOUNT_MOUNTING_SIGKILL] = UNIT_DEACTIVATING,
-        [MOUNT_REMOUNTING_SIGTERM] = UNIT_ACTIVE_RELOADING,
-        [MOUNT_REMOUNTING_SIGKILL] = UNIT_ACTIVE_RELOADING,
+        [MOUNT_REMOUNTING_SIGTERM] = UNIT_RELOADING,
+        [MOUNT_REMOUNTING_SIGKILL] = UNIT_RELOADING,
         [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING,
         [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING,
-        [MOUNT_MAINTENANCE] = UNIT_INACTIVE,
+        [MOUNT_MAINTENANCE] = UNIT_MAINTENANCE
 };
 
 static void mount_init(Unit *u) {
@@ -60,13 +60,15 @@ static void mount_init(Unit *u) {
         assert(u->meta.load_state == UNIT_STUB);
 
         m->timeout_usec = DEFAULT_TIMEOUT_USEC;
+        m->directory_mode = 0755;
+
         exec_context_init(&m->exec_context);
 
         /* We need to make sure that /bin/mount is always called in
          * the same process group as us, so that the autofs kernel
          * side doesn't send us another mount request while we are
          * already trying to comply its last one. */
-        m->exec_context.no_setsid = true;
+        m->exec_context.same_pgrp = true;
 
         m->timer_watch.type = WATCH_INVALID;
 
@@ -251,7 +253,7 @@ static int mount_add_target_links(Mount *m) {
         else
                 target = SPECIAL_LOCAL_FS_TARGET;
 
-        if ((r = manager_load_unit(UNIT(m)->meta.manager, target, NULL, &tu)) < 0)
+        if ((r = manager_load_unit(m->meta.manager, target, NULL, NULL, &tu)) < 0)
                 return r;
 
         if (automount && m->meta.manager->running_as == MANAGER_SYSTEM) {
@@ -260,11 +262,7 @@ static int mount_add_target_links(Mount *m) {
                 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
                         return r;
 
-                if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(am), true)) < 0)
-                        return r;
-
-                return unit_add_dependency(UNIT(am), UNIT_BEFORE, tu, true);
-
+                return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, UNIT(am), true);
         } else {
 
                 if (!noauto && handle)
@@ -276,6 +274,24 @@ static int mount_add_target_links(Mount *m) {
         }
 }
 
+static int mount_add_default_dependencies(Mount *m) {
+        int r;
+
+        assert(m);
+
+        if (m->meta.manager->running_as == MANAGER_SYSTEM &&
+            !path_equal(m->where, "/")) {
+
+                if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, SPECIAL_FSCK_TARGET, NULL, true)) < 0)
+                        return r;
+
+                if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTED_BY, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
+                        return r;
+        }
+
+        return 0;
+}
+
 static int mount_verify(Mount *m) {
         bool b;
         char *e;
@@ -294,15 +310,20 @@ static int mount_verify(Mount *m) {
         free(e);
 
         if (!b) {
-                log_error("%s's Where setting doesn't match unit name. Refusing.", UNIT(m)->meta.id);
+                log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id);
                 return -EINVAL;
         }
 
         if (m->meta.fragment_path && !m->parameters_fragment.what) {
-                log_error("%s's What setting is missing. Refusing.", UNIT(m)->meta.id);
+                log_error("%s's What setting is missing. Refusing.", m->meta.id);
                 return -EBADMSG;
         }
 
+        if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
+                log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
+                return -EINVAL;
+        }
+
         return 0;
 }
 
@@ -364,6 +385,10 @@ static int mount_load(Unit *u) {
 
                 if ((r = unit_add_default_cgroup(u)) < 0)
                         return r;
+
+                if (m->meta.default_dependencies)
+                        if ((r = mount_add_default_dependencies(m)) < 0)
+                                return r;
         }
 
         return mount_verify(m);
@@ -420,7 +445,7 @@ static void mount_set_state(Mount *m, MountState state) {
 
         if (state != old_state)
                 log_debug("%s changed %s -> %s",
-                          UNIT(m)->meta.id,
+                          m->meta.id,
                           mount_state_to_string(old_state),
                           mount_state_to_string(state));
 
@@ -492,7 +517,7 @@ static void mount_dump(Unit *u, FILE *f, const char *prefix) {
                 "%sFrom /etc/fstab: %s\n"
                 "%sFrom /proc/self/mountinfo: %s\n"
                 "%sFrom fragment: %s\n"
-                "%sKillMode: %s\n",
+                "%sDirectoryMode: %04o\n",
                 prefix, mount_state_to_string(m->state),
                 prefix, m->where,
                 prefix, strna(p->what),
@@ -501,7 +526,7 @@ static void mount_dump(Unit *u, FILE *f, const char *prefix) {
                 prefix, yes_no(m->from_etc_fstab),
                 prefix, yes_no(m->from_proc_self_mountinfo),
                 prefix, yes_no(m->from_fragment),
-                prefix, kill_mode_to_string(m->kill_mode));
+                prefix, m->directory_mode);
 
         if (m->control_pid > 0)
                 fprintf(f,
@@ -529,8 +554,9 @@ static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
                             m->meta.manager->environment,
                             true,
                             true,
-                            UNIT(m)->meta.manager->confirm_spawn,
-                            UNIT(m)->meta.cgroup_bondings,
+                            true,
+                            m->meta.manager->confirm_spawn,
+                            m->meta.cgroup_bondings,
                             &pid)) < 0)
                 goto fail;
 
@@ -575,14 +601,14 @@ static void mount_enter_signal(Mount *m, MountState state, bool success) {
         if (!success)
                 m->failure = true;
 
-        if (m->kill_mode != KILL_NONE) {
+        if (m->exec_context.kill_mode != KILL_NONE) {
                 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
                            state == MOUNT_UNMOUNTING_SIGTERM ||
-                           state == MOUNT_REMOUNTING_SIGTERM) ? SIGTERM : SIGKILL;
+                           state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
 
-                if (m->kill_mode == KILL_CONTROL_GROUP) {
+                if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
 
-                        if ((r = cgroup_bonding_kill_list(UNIT(m)->meta.cgroup_bondings, sig)) < 0) {
+                        if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig)) < 0) {
                                 if (r != -EAGAIN && r != -ESRCH)
                                         goto fail;
                         } else
@@ -590,7 +616,10 @@ static void mount_enter_signal(Mount *m, MountState state, bool success) {
                 }
 
                 if (!sent && m->control_pid > 0)
-                        if (kill(m->kill_mode == KILL_PROCESS ? m->control_pid : -m->control_pid, sig) < 0 && errno != ESRCH) {
+                        if (kill(m->exec_context.kill_mode == KILL_PROCESS ?
+                                 m->control_pid :
+                                 -m->control_pid, sig) < 0 && errno != ESRCH) {
+
                                 r = -errno;
                                 goto fail;
                         }
@@ -609,7 +638,7 @@ static void mount_enter_signal(Mount *m, MountState state, bool success) {
         return;
 
 fail:
-        log_warning("%s failed to kill processes: %s", UNIT(m)->meta.id, strerror(-r));
+        log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
 
         if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
                 mount_enter_mounted(m, false);
@@ -645,7 +674,7 @@ static void mount_enter_unmounting(Mount *m, bool success) {
         return;
 
 fail:
-        log_warning("%s failed to run 'umount' task: %s", UNIT(m)->meta.id, strerror(-r));
+        log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
         mount_enter_mounted(m, false);
 }
 
@@ -657,6 +686,8 @@ static void mount_enter_mounting(Mount *m) {
         m->control_command_id = MOUNT_EXEC_MOUNT;
         m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
 
+        mkdir_p(m->where, m->directory_mode);
+
         if (m->from_fragment)
                 r = exec_command_set(
                                 m->control_command,
@@ -688,7 +719,7 @@ static void mount_enter_mounting(Mount *m) {
         return;
 
 fail:
-        log_warning("%s failed to run 'mount' task: %s", UNIT(m)->meta.id, strerror(-r));
+        log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
         mount_enter_dead(m, false);
 }
 
@@ -758,6 +789,7 @@ static void mount_enter_remounting(Mount *m, bool success) {
         return;
 
 fail:
+        log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r));
         mount_enter_mounted(m, false);
 }
 
@@ -791,23 +823,20 @@ static int mount_stop(Unit *u) {
 
         assert(m);
 
-        /* Cann't do this right now. */
-        if (m->state == MOUNT_MOUNTING ||
-            m->state == MOUNT_MOUNTING_DONE ||
-            m->state == MOUNT_MOUNTING_SIGTERM ||
-            m->state == MOUNT_MOUNTING_SIGKILL ||
-            m->state == MOUNT_REMOUNTING ||
-            m->state == MOUNT_REMOUNTING_SIGTERM ||
-            m->state == MOUNT_REMOUNTING_SIGKILL)
-                return -EAGAIN;
-
         /* Already on it */
         if (m->state == MOUNT_UNMOUNTING ||
             m->state == MOUNT_UNMOUNTING_SIGKILL ||
             m->state == MOUNT_UNMOUNTING_SIGTERM)
                 return 0;
 
-        assert(m->state == MOUNT_MOUNTED);
+        assert(m->state == MOUNT_MOUNTING ||
+               m->state == MOUNT_MOUNTING_DONE ||
+               m->state == MOUNT_MOUNTED ||
+               m->state == MOUNT_MOUNTING_SIGTERM ||
+               m->state == MOUNT_MOUNTING_SIGKILL ||
+               m->state == MOUNT_REMOUNTING ||
+               m->state == MOUNT_REMOUNTING_SIGTERM ||
+               m->state == MOUNT_REMOUNTING_SIGKILL);
 
         mount_enter_unmounting(m, true);
         return 0;
@@ -848,7 +877,6 @@ static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
 
 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
         Mount *m = MOUNT(u);
-        int r;
 
         assert(u);
         assert(key);
@@ -873,7 +901,7 @@ static int mount_deserialize_item(Unit *u, const char *key, const char *value, F
         } else if (streq(key, "control-pid")) {
                 pid_t pid;
 
-                if ((r = parse_pid(value, &pid)) < 0)
+                if (parse_pid(value, &pid) < 0)
                         log_debug("Failed to parse control-pid value %s", value);
                 else
                         m->control_pid = pid;
@@ -929,12 +957,13 @@ static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
         m->failure = m->failure || !success;
 
         if (m->control_command) {
-                exec_status_fill(&m->control_command->exec_status, pid, code, status);
+                exec_status_exit(&m->control_command->exec_status, pid, code, status);
                 m->control_command = NULL;
                 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
         }
 
-        log_debug("%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
+        log_full(success ? LOG_DEBUG : LOG_NOTICE,
+                 "%s mount process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
 
         /* Note that mount(8) returning and the kernel sending us a
          * mount table change event might happen out-of-order. If an
@@ -1393,7 +1422,7 @@ void mount_fd_event(Manager *m, int events) {
          * table changes */
 
         if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
-                log_error("Failed to reread /proc/self/mountinfo: %s", strerror(errno));
+                log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
 
                 /* Reset flags, just in case, for later calls */
                 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
@@ -1458,55 +1487,15 @@ void mount_fd_event(Manager *m, int events) {
         }
 }
 
-int mount_path_is_mounted(Manager *m, const char* path) {
-        char *t;
-        int r;
+static void mount_reset_maintenance(Unit *u) {
+        Mount *m = MOUNT(u);
 
         assert(m);
-        assert(path);
-
-        if (path[0] != '/')
-                return 1;
-
-        if (!(t = strdup(path)))
-                return -ENOMEM;
-
-        path_kill_slashes(t);
 
-        for (;;) {
-                char *e, *slash;
-                Unit *u;
-
-                if (!(e = unit_name_from_path(t, ".mount"))) {
-                        r = -ENOMEM;
-                        goto finish;
-                }
-
-                u = manager_get_unit(m, e);
-                free(e);
+        if (m->state == MOUNT_MAINTENANCE)
+                mount_set_state(m, MOUNT_DEAD);
 
-                if (u &&
-                    (MOUNT(u)->from_etc_fstab || MOUNT(u)->from_fragment) &&
-                    MOUNT(u)->state != MOUNT_MOUNTED) {
-                        r = 0;
-                        goto finish;
-                }
-
-                assert_se(slash = strrchr(t, '/'));
-
-                if (slash == t) {
-                        r = 1;
-                        goto finish;
-                }
-
-                *slash = 0;
-        }
-
-        r = 1;
-
-finish:
-        free(t);
-        return r;
+        m->failure = false;
 }
 
 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
@@ -1541,6 +1530,7 @@ const UnitVTable mount_vtable = {
         .no_alias = true,
         .no_instances = true,
         .no_isolate = true,
+        .show_status = true,
 
         .init = mount_init,
         .load = mount_load,
@@ -1565,6 +1555,8 @@ const UnitVTable mount_vtable = {
         .sigchld_event = mount_sigchld_event,
         .timer_event = mount_timer_event,
 
+        .reset_maintenance = mount_reset_maintenance,
+
         .bus_message_handler = bus_mount_message_handler,
 
         .enumerate = mount_enumerate,