machined: add a full bus object for images

1 files changed, 234 insertions, 0 deletions

diff --git a/src/machine/image-dbus.c b/src/machine/image-dbus.c
new file mode 100644
index 0000000000..afb849b41a
--- /dev/null
+++ b/src/machine/image-dbus.c
@@ -0,0 +1,234 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2014 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "bus-label.h"
+#include "bus-common-errors.h"
+#include "strv.h"
+#include "image.h"
+
+static int image_find_by_bus_path(const char *path, Image **ret) {
+        _cleanup_free_ char *e = NULL;
+        const char *p;
+
+        assert(path);
+
+        p = startswith(path, "/org/freedesktop/machine1/image/");
+        if (!p)
+                return 0;
+
+        e = bus_label_unescape(p);
+        if (!e)
+                return -ENOMEM;
+
+        return image_find(e, ret);
+}
+
+static int image_find_by_bus_path_with_error(const char *path, Image **ret, sd_bus_error *error) {
+        int r;
+
+        assert(path);
+
+        r = image_find_by_bus_path(path, ret);
+        if (r == 0)
+                return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_IMAGE, "Image doesn't exist.");
+
+        return r;
+}
+
+static int property_get_name(
+                sd_bus *bus,
+                const char *path,
+                const char *interface,
+                const char *property,
+                sd_bus_message *reply,
+                void *userdata,
+                sd_bus_error *error) {
+
+        _cleanup_(image_unrefp) Image *image = NULL;
+        int r;
+
+        assert(bus);
+        assert(reply);
+
+        r = image_find_by_bus_path_with_error(path, &image, error);
+        if (r < 0)
+                return r;
+
+        r = sd_bus_message_append(reply, "s", image->name);
+        if (r < 0)
+                return r;
+
+        return 1;
+}
+
+static int property_get_path(
+                sd_bus *bus,
+                const char *path,
+                const char *interface,
+                const char *property,
+                sd_bus_message *reply,
+                void *userdata,
+                sd_bus_error *error) {
+
+        _cleanup_(image_unrefp) Image *image = NULL;
+        int r;
+
+        assert(bus);
+        assert(reply);
+
+        r = image_find_by_bus_path_with_error(path, &image, error);
+        if (r < 0)
+                return r;
+
+        r = sd_bus_message_append(reply, "s", image->path);
+        if (r < 0)
+                return r;
+
+        return 1;
+}
+
+static int property_get_type(
+                sd_bus *bus,
+                const char *path,
+                const char *interface,
+                const char *property,
+                sd_bus_message *reply,
+                void *userdata,
+                sd_bus_error *error) {
+
+
+        _cleanup_(image_unrefp) Image *image = NULL;
+        int r;
+
+        assert(bus);
+        assert(reply);
+
+        r = image_find_by_bus_path_with_error(path, &image, error);
+        if (r < 0)
+                return r;
+
+        r = sd_bus_message_append(reply, "s", image_type_to_string(image->type));
+        if (r < 0)
+                return r;
+
+        return 1;
+}
+
+static int property_get_read_only(
+                sd_bus *bus,
+                const char *path,
+                const char *interface,
+                const char *property,
+                sd_bus_message *reply,
+                void *userdata,
+                sd_bus_error *error) {
+
+
+        _cleanup_(image_unrefp) Image *image = NULL;
+        int r;
+
+        assert(bus);
+        assert(reply);
+
+        r = image_find_by_bus_path_with_error(path, &image, error);
+        if (r < 0)
+                return r;
+
+        r = sd_bus_message_append(reply, "b", image->read_only);
+        if (r < 0)
+                return r;
+
+        return 1;
+}
+
+const sd_bus_vtable image_vtable[] = {
+        SD_BUS_VTABLE_START(0),
+        SD_BUS_PROPERTY("Name",     "s", property_get_name,      0, 0),
+        SD_BUS_PROPERTY("Path",     "s", property_get_path,      0, 0),
+        SD_BUS_PROPERTY("Type",     "s", property_get_type,      0, 0),
+        SD_BUS_PROPERTY("ReadOnly", "b", property_get_read_only, 0, 0),
+        SD_BUS_VTABLE_END
+};
+
+int image_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) {
+        int r;
+
+        assert(bus);
+        assert(path);
+        assert(interface);
+        assert(found);
+
+        r = image_find_by_bus_path(path, NULL);
+        if (r <= 0)
+                return r;
+
+        *found = NULL;
+        return 1;
+}
+
+char *image_bus_path(const char *name) {
+        _cleanup_free_ char *e = NULL;
+
+        assert(name);
+
+        e = bus_label_escape(name);
+        if (!e)
+                return NULL;
+
+        return strappend("/org/freedesktop/machine1/image/", e);
+}
+
+int image_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error) {
+        _cleanup_(image_hashmap_freep) Hashmap *images = NULL;
+        _cleanup_strv_free_ char **l = NULL;
+        Image *image;
+        Iterator i;
+        int r;
+
+        assert(bus);
+        assert(path);
+        assert(nodes);
+
+        images = hashmap_new(&string_hash_ops);
+        if (!images)
+                return -ENOMEM;
+
+        r = image_discover(images);
+        if (r < 0)
+                return r;
+
+        HASHMAP_FOREACH(image, images, i) {
+                char *p;
+
+                p = image_bus_path(image->name);
+                if (!p)
+                        return -ENOMEM;
+
+                r = strv_consume(&l, p);
+                if (r < 0)
+                        return r;
+        }
+
+        *nodes = l;
+        l = NULL;
+
+        return 1;
+}