X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fsnapshot.c;h=a23f2dba400e00d51254a371898388bd9ec7f687;hp=513bf66475679106698f1983fba5a6d058bca519;hb=b9c0d4415b8cd6135321185b6febfdd1366a477c;hpb=e99e38bbdcca3fe5956823bdb3d38544ccf93221

diff --git a/src/snapshot.c b/src/snapshot.c
index 513bf6647..a23f2dba4 100644
--- a/src/snapshot.c
+++ b/src/snapshot.c
@@ -1,4 +1,4 @@
-/*-*- Mode: C; c-basic-offset: 8 -*-*/
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
 
 /***
   This file is part of systemd.
@@ -25,6 +25,7 @@
 #include "snapshot.h"
 #include "unit-name.h"
 #include "dbus-snapshot.h"
+#include "bus-errors.h"
 
 static const UnitActiveState state_translation_table[_SNAPSHOT_STATE_MAX] = {
         [SNAPSHOT_DEAD] = UNIT_INACTIVE,
@@ -40,13 +41,28 @@ static void snapshot_set_state(Snapshot *s, SnapshotState state) {
 
         if (state != old_state)
                 log_debug("%s changed %s -> %s",
-                          UNIT(s)->meta.id,
+                          s->meta.id,
                           snapshot_state_to_string(old_state),
                           snapshot_state_to_string(state));
 
         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
 }
 
+static int snapshot_load(Unit *u) {
+        Snapshot *s = SNAPSHOT(u);
+
+        assert(u);
+        assert(u->meta.load_state == UNIT_STUB);
+
+        /* Make sure that only snapshots created via snapshot_create()
+         * can be loaded */
+        if (!s->by_snapshot_create && s->meta.manager->n_deserializing <= 0)
+                return -ENOENT;
+
+        u->meta.load_state = UNIT_LOADED;
+        return 0;
+}
+
 static int snapshot_coldplug(Unit *u) {
         Snapshot *s = SNAPSHOT(u);
 
@@ -107,8 +123,8 @@ static int snapshot_serialize(Unit *u, FILE *f, FDSet *fds) {
 
         unit_serialize_item(u, f, "state", snapshot_state_to_string(s->state));
         unit_serialize_item(u, f, "cleanup", yes_no(s->cleanup));
-        SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES], i)
-                unit_serialize_item(u, f, "requires", other->meta.id);
+        SET_FOREACH(other, u->meta.dependencies[UNIT_WANTS], i)
+                unit_serialize_item(u, f, "wants", other->meta.id);
 
         return 0;
 }
@@ -137,12 +153,9 @@ static int snapshot_deserialize_item(Unit *u, const char *key, const char *value
                 else
                         s->cleanup = r;
 
-        } else if (streq(key, "requires")) {
+        } else if (streq(key, "wants")) {
 
-                if ((r = unit_add_dependency_by_name(u, UNIT_AFTER, value, NULL, true)) < 0)
-                        return r;
-
-                if ((r = unit_add_dependency_by_name(u, UNIT_REQUIRES, value, NULL, true)) < 0)
+                if ((r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, value, NULL, true)) < 0)
                         return r;
         } else
                 log_debug("Unknown serialization key '%s'", key);
@@ -162,7 +175,7 @@ static const char *snapshot_sub_state_to_string(Unit *u) {
         return snapshot_state_to_string(SNAPSHOT(u)->state);
 }
 
-int snapshot_create(Manager *m, const char *name, bool cleanup, Snapshot **_s) {
+int snapshot_create(Manager *m, const char *name, bool cleanup, DBusError *e, Snapshot **_s) {
         Iterator i;
         Unit *other, *u = NULL;
         char *n = NULL;
@@ -173,14 +186,20 @@ int snapshot_create(Manager *m, const char *name, bool cleanup, Snapshot **_s) {
         assert(_s);
 
         if (name) {
-                if (!unit_name_is_valid(name))
+                if (!unit_name_is_valid(name, false)) {
+                        dbus_set_error(e, BUS_ERROR_INVALID_NAME, "Unit name %s is not valid.", name);
                         return -EINVAL;
+                }
 
-                if (unit_name_to_type(name) != UNIT_SNAPSHOT)
+                if (unit_name_to_type(name) != UNIT_SNAPSHOT) {
+                        dbus_set_error(e, BUS_ERROR_UNIT_TYPE_MISMATCH, "Unit name %s lacks snapshot suffix.", name);
                         return -EINVAL;
+                }
 
-                if (manager_get_unit(m, name))
+                if (manager_get_unit(m, name)) {
+                        dbus_set_error(e, BUS_ERROR_UNIT_EXISTS, "Snapshot %s exists already.", name);
                         return -EEXIST;
+                }
 
         } else {
 
@@ -197,12 +216,16 @@ int snapshot_create(Manager *m, const char *name, bool cleanup, Snapshot **_s) {
                 name = n;
         }
 
-        r = manager_load_unit(m, name, NULL, &u);
+        r = manager_load_unit_prepare(m, name, NULL, e, &u);
         free(n);
 
         if (r < 0)
                 goto fail;
 
+        SNAPSHOT(u)->by_snapshot_create = true;
+        manager_dispatch_load_queue(m);
+        assert(u->meta.load_state == UNIT_LOADED);
+
         HASHMAP_FOREACH_KEY(other, k, m->units, i) {
 
                 if (UNIT_VTABLE(other)->no_snapshots)
@@ -218,10 +241,7 @@ int snapshot_create(Manager *m, const char *name, bool cleanup, Snapshot **_s) {
                 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
                         continue;
 
-                if ((r = unit_add_dependency(u, UNIT_REQUIRES, other, true)) < 0)
-                        goto fail;
-
-                if ((r = unit_add_dependency(u, UNIT_AFTER, other, true)) < 0)
+                if ((r = unit_add_two_dependencies(u, UNIT_AFTER, UNIT_WANTS, other, true)) < 0)
                         goto fail;
         }
 
@@ -258,7 +278,7 @@ const UnitVTable snapshot_vtable = {
         .no_snapshots = true,
         .no_gc = true,
 
-        .load = unit_load_nop,
+        .load = snapshot_load,
         .coldplug = snapshot_coldplug,
 
         .dump = snapshot_dump,
@@ -272,5 +292,6 @@ const UnitVTable snapshot_vtable = {
         .active_state = snapshot_active_state,
         .sub_state_to_string = snapshot_sub_state_to_string,
 
+        .bus_interface = "org.freedesktop.systemd1.Snapshot",
         .bus_message_handler = bus_snapshot_message_handler
 };