/*-*- 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 "strv.h" #include "bus-util.h" #include "machine-image.h" #include "image-dbus.h" static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_type, image_type, ImageType); int bus_image_method_remove( sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) { Image *image = userdata; Manager *m = image->userdata; int r; assert(bus); assert(message); assert(image); r = bus_verify_polkit_async( message, CAP_SYS_ADMIN, "org.freedesktop.machine1.manage-images", false, UID_INVALID, &m->polkit_registry, error); if (r < 0) return r; if (r == 0) return 1; /* Will call us back */ r = image_remove(image); if (r < 0) return r; return sd_bus_reply_method_return(message, NULL); } int bus_image_method_rename( sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) { Image *image = userdata; Manager *m = image->userdata; const char *new_name; int r; assert(bus); assert(message); assert(image); r = sd_bus_message_read(message, "s", &new_name); if (r < 0) return r; if (!image_name_is_valid(new_name)) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Image name '%s' is invalid.", new_name); r = bus_verify_polkit_async( message, CAP_SYS_ADMIN, "org.freedesktop.machine1.manage-images", false, UID_INVALID, &m->polkit_registry, error); if (r < 0) return r; if (r == 0) return 1; /* Will call us back */ r = image_rename(image, new_name); if (r < 0) return r; return sd_bus_reply_method_return(message, NULL); } int bus_image_method_clone( sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) { Image *image = userdata; Manager *m = image->userdata; const char *new_name; int r, read_only; assert(bus); assert(message); assert(image); r = sd_bus_message_read(message, "sb", &new_name, &read_only); if (r < 0) return r; if (!image_name_is_valid(new_name)) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Image name '%s' is invalid.", new_name); r = bus_verify_polkit_async( message, CAP_SYS_ADMIN, "org.freedesktop.machine1.manage-images", false, UID_INVALID, &m->polkit_registry, error); if (r < 0) return r; if (r == 0) return 1; /* Will call us back */ r = image_clone(image, new_name, read_only); if (r < 0) return r; return sd_bus_reply_method_return(message, NULL); } int bus_image_method_mark_read_only( sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) { Image *image = userdata; Manager *m = image->userdata; int r, read_only; assert(bus); assert(message); r = sd_bus_message_read(message, "b", &read_only); if (r < 0) return r; r = bus_verify_polkit_async( message, CAP_SYS_ADMIN, "org.freedesktop.machine1.manage-images", false, UID_INVALID, &m->polkit_registry, error); if (r < 0) return r; if (r == 0) return 1; /* Will call us back */ r = image_read_only(image, read_only); if (r < 0) return r; return sd_bus_reply_method_return(message, NULL); } int bus_image_method_set_limit( sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) { Image *image = userdata; Manager *m = image->userdata; uint64_t limit; int r; assert(bus); assert(message); r = sd_bus_message_read(message, "t", &limit); if (r < 0) return r; r = bus_verify_polkit_async( message, CAP_SYS_ADMIN, "org.freedesktop.machine1.manage-images", false, UID_INVALID, &m->polkit_registry, error); if (r < 0) return r; if (r == 0) return 1; /* Will call us back */ r = image_set_limit(image, limit); if (r < 0) return r; return sd_bus_reply_method_return(message, NULL); } const sd_bus_vtable image_vtable[] = { SD_BUS_VTABLE_START(0), SD_BUS_PROPERTY("Name", "s", NULL, offsetof(Image, name), 0), SD_BUS_PROPERTY("Path", "s", NULL, offsetof(Image, path), 0), SD_BUS_PROPERTY("Type", "s", property_get_type, offsetof(Image, type), 0), SD_BUS_PROPERTY("ReadOnly", "b", bus_property_get_bool, offsetof(Image, read_only), 0), SD_BUS_PROPERTY("CreationTimestamp", "t", NULL, offsetof(Image, crtime), 0), SD_BUS_PROPERTY("ModificationTimestamp", "t", NULL, offsetof(Image, mtime), 0), SD_BUS_PROPERTY("Usage", "t", NULL, offsetof(Image, usage), 0), SD_BUS_PROPERTY("Limit", "t", NULL, offsetof(Image, limit), 0), SD_BUS_PROPERTY("UsageExclusive", "t", NULL, offsetof(Image, usage_exclusive), 0), SD_BUS_PROPERTY("LimitExclusive", "t", NULL, offsetof(Image, limit_exclusive), 0), SD_BUS_METHOD("Remove", NULL, NULL, bus_image_method_remove, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD("Rename", "s", NULL, bus_image_method_rename, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD("Clone", "sb", NULL, bus_image_method_clone, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD("MarkReadOnly", "b", NULL, bus_image_method_mark_read_only, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD("SetLimit", "t", NULL, bus_image_method_set_limit, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_VTABLE_END }; static int image_flush_cache(sd_event_source *s, void *userdata) { Manager *m = userdata; Image *i; assert(s); assert(m); while ((i = hashmap_steal_first(m->image_cache))) image_unref(i); return 0; } int image_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) { _cleanup_free_ char *e = NULL; Manager *m = userdata; Image *image = NULL; const char *p; int r; assert(bus); assert(path); assert(interface); assert(found); p = startswith(path, "/org/freedesktop/machine1/image/"); if (!p) return 0; e = bus_label_unescape(p); if (!e) return -ENOMEM; image = hashmap_get(m->image_cache, e); if (image) { *found = image; return 1; } r = hashmap_ensure_allocated(&m->image_cache, &string_hash_ops); if (r < 0) return r; if (!m->image_cache_defer_event) { r = sd_event_add_defer(m->event, &m->image_cache_defer_event, image_flush_cache, m); if (r < 0) return r; r = sd_event_source_set_priority(m->image_cache_defer_event, SD_EVENT_PRIORITY_IDLE); if (r < 0) return r; } r = sd_event_source_set_enabled(m->image_cache_defer_event, SD_EVENT_ONESHOT); if (r < 0) return r; r = image_find(e, &image); if (r <= 0) return r; image->userdata = m; r = hashmap_put(m->image_cache, image->name, image); if (r < 0) { image_unref(image); return r; } *found = image; 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; }