/* SPDX-License-Identifier: LGPL-2.1-or-later */ #include "alloc-util.h" #include "btrfs-util.h" #include "bus-common-errors.h" #include "bus-object.h" #include "bus-polkit.h" #include "discover-image.h" #include "fd-util.h" #include "io-util.h" #include "missing_capability.h" #include "portable.h" #include "portabled-bus.h" #include "portabled-image-bus.h" #include "portabled-image.h" #include "portabled.h" #include "strv.h" #include "user-util.h" static int property_get_pool_path( sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error) { assert(bus); assert(reply); return sd_bus_message_append(reply, "s", "/var/lib/portables"); } static int property_get_pool_usage( sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error) { _cleanup_close_ int fd = -1; uint64_t usage = UINT64_MAX; assert(bus); assert(reply); fd = open("/var/lib/portables", O_RDONLY|O_CLOEXEC|O_DIRECTORY); if (fd >= 0) { BtrfsQuotaInfo q; if (btrfs_subvol_get_subtree_quota_fd(fd, 0, &q) >= 0) usage = q.referenced; } return sd_bus_message_append(reply, "t", usage); } static int property_get_pool_limit( sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error) { _cleanup_close_ int fd = -1; uint64_t size = UINT64_MAX; assert(bus); assert(reply); fd = open("/var/lib/portables", O_RDONLY|O_CLOEXEC|O_DIRECTORY); if (fd >= 0) { BtrfsQuotaInfo q; if (btrfs_subvol_get_subtree_quota_fd(fd, 0, &q) >= 0) size = q.referenced_max; } return sd_bus_message_append(reply, "t", size); } static int property_get_profiles( sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error) { _cleanup_strv_free_ char **l = NULL; int r; assert(bus); assert(reply); r = portable_get_profiles(&l); if (r < 0) return r; return sd_bus_message_append_strv(reply, l); } static int method_get_image(sd_bus_message *message, void *userdata, sd_bus_error *error) { _cleanup_free_ char *p = NULL; Manager *m = userdata; const char *name; Image *image; int r; assert(message); assert(m); r = sd_bus_message_read(message, "s", &name); if (r < 0) return r; r = bus_image_acquire(m, message, name, NULL, BUS_IMAGE_REFUSE_BY_PATH, NULL, &image, error); if (r < 0) return r; r = bus_image_path(image, &p); if (r < 0) return r; return sd_bus_reply_method_return(message, "o", p); } static int method_list_images(sd_bus_message *message, void *userdata, sd_bus_error *error) { _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; _cleanup_hashmap_free_ Hashmap *images = NULL; Manager *m = userdata; Image *image; int r; assert(message); assert(m); images = hashmap_new(&image_hash_ops); if (!images) return -ENOMEM; r = manager_image_cache_discover(m, images, error); if (r < 0) return r; r = sd_bus_message_new_method_return(message, &reply); if (r < 0) return r; r = sd_bus_message_open_container(reply, 'a', "(ssbtttso)"); if (r < 0) return r; HASHMAP_FOREACH(image, images) { _cleanup_(sd_bus_error_free) sd_bus_error error_state = SD_BUS_ERROR_NULL; PortableState state = _PORTABLE_STATE_INVALID; _cleanup_free_ char *p = NULL; r = bus_image_path(image, &p); if (r < 0) return r; r = portable_get_state( sd_bus_message_get_bus(message), image->path, NULL, 0, &state, &error_state); if (r < 0) log_debug_errno(r, "Failed to get state of image '%s', ignoring: %s", image->path, bus_error_message(&error_state, r)); r = sd_bus_message_append(reply, "(ssbtttso)", image->name, image_type_to_string(image->type), image->read_only, image->crtime, image->mtime, image->usage, portable_state_to_string(state), p); if (r < 0) return r; } r = sd_bus_message_close_container(reply); if (r < 0) return r; return sd_bus_send(NULL, reply, NULL); } static int redirect_method_to_image( Manager *m, sd_bus_message *message, sd_bus_error *error, int (*method)(Manager *m, sd_bus_message *message, const char *name_or_path, Image *image, sd_bus_error* error)) { const char *name_or_path; int r; assert(m); assert(message); assert(method); r = sd_bus_message_read(message, "s", &name_or_path); if (r < 0) return r; return method(m, message, name_or_path, NULL, error); } static int method_get_image_os_release(sd_bus_message *message, void *userdata, sd_bus_error *error) { return redirect_method_to_image(userdata, message, error, bus_image_common_get_os_release); } static int method_get_image_metadata(sd_bus_message *message, void *userdata, sd_bus_error *error) { return redirect_method_to_image(userdata, message, error, bus_image_common_get_metadata); } static int method_get_image_state(sd_bus_message *message, void *userdata, sd_bus_error *error) { _cleanup_strv_free_ char **extension_images = NULL; const char *name_or_path; PortableState state; int r; assert(message); r = sd_bus_message_read(message, "s", &name_or_path); if (r < 0) return r; if (sd_bus_message_is_method_call(message, NULL, "GetImageStateWithExtensions")) { uint64_t input_flags = 0; r = sd_bus_message_read_strv(message, &extension_images); if (r < 0) return r; r = sd_bus_message_read(message, "t", &input_flags); if (r < 0) return r; /* No flags are supported by this method for now. */ if (input_flags != 0) return sd_bus_reply_method_errorf(message, SD_BUS_ERROR_INVALID_ARGS, "Invalid 'flags' parameter '%" PRIu64 "'", input_flags); } r = portable_get_state( sd_bus_message_get_bus(message), name_or_path, extension_images, 0, &state, error); if (r < 0) return r; return sd_bus_reply_method_return(message, "s", portable_state_to_string(state)); } static int method_attach_image(sd_bus_message *message, void *userdata, sd_bus_error *error) { return redirect_method_to_image(userdata, message, error, bus_image_common_attach); } static int method_detach_image(sd_bus_message *message, void *userdata, sd_bus_error *error) { _cleanup_strv_free_ char **extension_images = NULL; PortableChange *changes = NULL; PortableFlags flags = 0; Manager *m = userdata; size_t n_changes = 0; const char *name_or_path; int r; assert(message); assert(m); /* Note that we do not redirect detaching to the image object here, because we want to allow that users can * detach already deleted images too, in case the user already deleted an image before properly detaching * it. */ r = sd_bus_message_read(message, "s", &name_or_path); if (r < 0) return r; if (sd_bus_message_is_method_call(message, NULL, "DetachImageWithExtensions")) { uint64_t input_flags = 0; r = sd_bus_message_read_strv(message, &extension_images); if (r < 0) return r; r = sd_bus_message_read(message, "t", &input_flags); if (r < 0) return r; if ((input_flags & ~_PORTABLE_MASK_PUBLIC) != 0) return sd_bus_reply_method_errorf(message, SD_BUS_ERROR_INVALID_ARGS, "Invalid 'flags' parameter '%" PRIu64 "'", input_flags); flags |= input_flags; } else { int runtime; r = sd_bus_message_read(message, "b", &runtime); if (r < 0) return r; if (runtime) flags |= PORTABLE_RUNTIME; } r = bus_verify_polkit_async( message, CAP_SYS_ADMIN, "org.freedesktop.portable1.attach-images", NULL, false, UID_INVALID, &m->polkit_registry, error); if (r < 0) return r; if (r == 0) return 1; /* Will call us back */ r = portable_detach( sd_bus_message_get_bus(message), name_or_path, extension_images, flags, &changes, &n_changes, error); if (r < 0) goto finish; r = reply_portable_changes(message, changes, n_changes); finish: portable_changes_free(changes, n_changes); return r; } static int method_reattach_image(sd_bus_message *message, void *userdata, sd_bus_error *error) { return redirect_method_to_image(userdata, message, error, bus_image_common_reattach); } static int method_remove_image(sd_bus_message *message, void *userdata, sd_bus_error *error) { return redirect_method_to_image(userdata, message, error, bus_image_common_remove); } static int method_mark_image_read_only(sd_bus_message *message, void *userdata, sd_bus_error *error) { return redirect_method_to_image(userdata, message, error, bus_image_common_mark_read_only); } static int method_set_image_limit(sd_bus_message *message, void *userdata, sd_bus_error *error) { return redirect_method_to_image(userdata, message, error, bus_image_common_set_limit); } static int method_set_pool_limit(sd_bus_message *message, void *userdata, sd_bus_error *error) { Manager *m = userdata; uint64_t limit; int r; assert(message); r = sd_bus_message_read(message, "t", &limit); if (r < 0) return r; if (!FILE_SIZE_VALID_OR_INFINITY(limit)) return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "New limit out of range"); r = bus_verify_polkit_async( message, CAP_SYS_ADMIN, "org.freedesktop.portable1.manage-images", NULL, false, UID_INVALID, &m->polkit_registry, error); if (r < 0) return r; if (r == 0) return 1; /* Will call us back */ (void) btrfs_qgroup_set_limit("/var/lib/portables", 0, limit); r = btrfs_subvol_set_subtree_quota_limit("/var/lib/portables", 0, limit); if (r == -ENOTTY) return sd_bus_error_set(error, SD_BUS_ERROR_NOT_SUPPORTED, "Quota is only supported on btrfs."); if (r < 0) return sd_bus_error_set_errnof(error, r, "Failed to adjust quota limit: %m"); return sd_bus_reply_method_return(message, NULL); } const sd_bus_vtable manager_vtable[] = { SD_BUS_VTABLE_START(0), SD_BUS_PROPERTY("PoolPath", "s", property_get_pool_path, 0, 0), SD_BUS_PROPERTY("PoolUsage", "t", property_get_pool_usage, 0, 0), SD_BUS_PROPERTY("PoolLimit", "t", property_get_pool_limit, 0, 0), SD_BUS_PROPERTY("Profiles", "as", property_get_profiles, 0, 0), SD_BUS_METHOD_WITH_ARGS("GetImage", SD_BUS_ARGS("s", image), SD_BUS_RESULT("o", object), method_get_image, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("ListImages", SD_BUS_NO_ARGS, SD_BUS_RESULT("a(ssbtttso)", images), method_list_images, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("GetImageOSRelease", SD_BUS_ARGS("s", image), SD_BUS_RESULT("a{ss}", os_release), method_get_image_os_release, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("GetImageMetadata", SD_BUS_ARGS("s", image, "as", matches), SD_BUS_RESULT("s", image, "ay", os_release, "a{say}", units), method_get_image_metadata, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("GetImageMetadataWithExtensions", SD_BUS_ARGS("s", image, "as", extensions, "as", matches, "t", flags), SD_BUS_RESULT("s", image, "ay", os_release, "a{say}", units), method_get_image_metadata, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("GetImageState", SD_BUS_ARGS("s", image), SD_BUS_RESULT("s", state), method_get_image_state, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("GetImageStateWithExtensions", SD_BUS_ARGS("s", image, "as", extensions, "t", flags), SD_BUS_RESULT("s", state), method_get_image_state, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("AttachImage", SD_BUS_ARGS("s", image, "as", matches, "s", profile, "b", runtime, "s", copy_mode), SD_BUS_RESULT("a(sss)", changes), method_attach_image, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("AttachImageWithExtensions", SD_BUS_ARGS("s", image, "as", extensions, "as", matches, "s", profile, "s", copy_mode, "t", flags), SD_BUS_RESULT("a(sss)", changes), method_attach_image, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("DetachImage", SD_BUS_ARGS("s", image, "b", runtime), SD_BUS_RESULT("a(sss)", changes), method_detach_image, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("DetachImageWithExtensions", SD_BUS_ARGS("s", image, "as", extensions, "t", flags), SD_BUS_RESULT("a(sss)", changes), method_detach_image, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("ReattachImage", SD_BUS_ARGS("s", image, "as", matches, "s", profile, "b", runtime, "s", copy_mode), SD_BUS_RESULT("a(sss)", changes_removed, "a(sss)", changes_updated), method_reattach_image, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("ReattachImageWithExtensions", SD_BUS_ARGS("s", image, "as", extensions, "as", matches, "s", profile, "s", copy_mode, "t", flags), SD_BUS_RESULT("a(sss)", changes_removed, "a(sss)", changes_updated), method_reattach_image, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("RemoveImage", SD_BUS_ARGS("s", image), SD_BUS_NO_RESULT, method_remove_image, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("MarkImageReadOnly", SD_BUS_ARGS("s", image, "b", read_only), SD_BUS_NO_RESULT, method_mark_image_read_only, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("SetImageLimit", SD_BUS_ARGS("s", image, "t", limit), SD_BUS_NO_RESULT, method_set_image_limit, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("SetPoolLimit", SD_BUS_ARGS("t", limit), SD_BUS_NO_RESULT, method_set_pool_limit, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_VTABLE_END }; const BusObjectImplementation manager_object = { "/org/freedesktop/portable1", "org.freedesktop.portable1.Manager", .vtables = BUS_VTABLES(manager_vtable), .children = BUS_IMPLEMENTATIONS(&image_object), }; static int reply_portable_compose_message(sd_bus_message *reply, const PortableChange *changes, size_t n_changes) { size_t i; int r; assert(reply); assert(changes || n_changes == 0); r = sd_bus_message_open_container(reply, 'a', "(sss)"); if (r < 0) return r; for (i = 0; i < n_changes; i++) { if (changes[i].type_or_errno < 0) continue; r = sd_bus_message_append(reply, "(sss)", portable_change_type_to_string(changes[i].type_or_errno), changes[i].path, changes[i].source); if (r < 0) return r; } r = sd_bus_message_close_container(reply); if (r < 0) return r; return 0; } int reply_portable_changes(sd_bus_message *m, const PortableChange *changes, size_t n_changes) { _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; int r; assert(m); r = sd_bus_message_new_method_return(m, &reply); if (r < 0) return r; r = reply_portable_compose_message(reply, changes, n_changes); if (r < 0) return r; return sd_bus_send(NULL, reply, NULL); } int reply_portable_changes_pair( sd_bus_message *m, const PortableChange *changes_first, size_t n_changes_first, const PortableChange *changes_second, size_t n_changes_second) { _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; int r; assert(m); r = sd_bus_message_new_method_return(m, &reply); if (r < 0) return r; r = reply_portable_compose_message(reply, changes_first, n_changes_first); if (r < 0) return r; r = reply_portable_compose_message(reply, changes_second, n_changes_second); if (r < 0) return r; return sd_bus_send(NULL, reply, NULL); }