/* SPDX-License-Identifier: LGPL-2.1-or-later */ #include #include #include "sd-id128.h" #include "alloc-util.h" #include "btrfs-util.h" #include "bus-common-errors.h" #include "bus-get-properties.h" #include "bus-locator.h" #include "bus-polkit.h" #include "cgroup-util.h" #include "discover-image.h" #include "errno-util.h" #include "fd-util.h" #include "fileio.h" #include "format-util.h" #include "hostname-util.h" #include "image-dbus.h" #include "io-util.h" #include "machine-dbus.h" #include "machine-pool.h" #include "machined.h" #include "missing_capability.h" #include "os-util.h" #include "path-util.h" #include "process-util.h" #include "stdio-util.h" #include "strv.h" #include "tmpfile-util.h" #include "unit-name.h" #include "user-util.h" static BUS_DEFINE_PROPERTY_GET_GLOBAL(property_get_pool_path, "s", "/var/lib/machines"); 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 = -EBADF; uint64_t usage = UINT64_MAX; assert(bus); assert(reply); fd = open("/var/lib/machines", 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 = -EBADF; uint64_t size = UINT64_MAX; assert(bus); assert(reply); fd = open("/var/lib/machines", 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 method_get_machine(sd_bus_message *message, void *userdata, sd_bus_error *error) { _cleanup_free_ char *p = NULL; Manager *m = ASSERT_PTR(userdata); Machine *machine; const char *name; int r; assert(message); r = sd_bus_message_read(message, "s", &name); if (r < 0) return r; machine = hashmap_get(m->machines, name); if (!machine) return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_MACHINE, "No machine '%s' known", name); p = machine_bus_path(machine); if (!p) return -ENOMEM; return sd_bus_reply_method_return(message, "o", p); } static int method_get_image(sd_bus_message *message, void *userdata, sd_bus_error *error) { _cleanup_free_ char *p = NULL; _unused_ Manager *m = ASSERT_PTR(userdata); const char *name; int r; assert(message); r = sd_bus_message_read(message, "s", &name); if (r < 0) return r; r = image_find(IMAGE_MACHINE, name, NULL, NULL); if (r == -ENOENT) return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_IMAGE, "No image '%s' known", name); if (r < 0) return r; p = image_bus_path(name); if (!p) return -ENOMEM; return sd_bus_reply_method_return(message, "o", p); } static int method_get_machine_by_pid(sd_bus_message *message, void *userdata, sd_bus_error *error) { _cleanup_free_ char *p = NULL; Manager *m = ASSERT_PTR(userdata); Machine *machine = NULL; pid_t pid; int r; assert(message); assert_cc(sizeof(pid_t) == sizeof(uint32_t)); r = sd_bus_message_read(message, "u", &pid); if (r < 0) return r; if (pid < 0) return -EINVAL; if (pid == 0) { _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_PID, &creds); if (r < 0) return r; r = sd_bus_creds_get_pid(creds, &pid); if (r < 0) return r; } r = manager_get_machine_by_pid(m, pid, &machine); if (r < 0) return r; if (!machine) return sd_bus_error_setf(error, BUS_ERROR_NO_MACHINE_FOR_PID, "PID "PID_FMT" does not belong to any known machine", pid); p = machine_bus_path(machine); if (!p) return -ENOMEM; return sd_bus_reply_method_return(message, "o", p); } static int method_list_machines(sd_bus_message *message, void *userdata, sd_bus_error *error) { _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; Manager *m = ASSERT_PTR(userdata); Machine *machine; int r; assert(message); r = sd_bus_message_new_method_return(message, &reply); if (r < 0) return sd_bus_error_set_errno(error, r); r = sd_bus_message_open_container(reply, 'a', "(ssso)"); if (r < 0) return sd_bus_error_set_errno(error, r); HASHMAP_FOREACH(machine, m->machines) { _cleanup_free_ char *p = NULL; p = machine_bus_path(machine); if (!p) return -ENOMEM; r = sd_bus_message_append(reply, "(ssso)", machine->name, strempty(machine_class_to_string(machine->class)), machine->service, p); if (r < 0) return sd_bus_error_set_errno(error, r); } r = sd_bus_message_close_container(reply); if (r < 0) return sd_bus_error_set_errno(error, r); return sd_bus_send(NULL, reply, NULL); } static int method_create_or_register_machine(Manager *manager, sd_bus_message *message, bool read_network, Machine **_m, sd_bus_error *error) { const char *name, *service, *class, *root_directory; const int32_t *netif = NULL; MachineClass c; uint32_t leader; sd_id128_t id; const void *v; Machine *m; size_t n, n_netif = 0; int r; assert(manager); assert(message); assert(_m); r = sd_bus_message_read(message, "s", &name); if (r < 0) return r; if (!hostname_is_valid(name, 0)) return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid machine name"); r = sd_bus_message_read_array(message, 'y', &v, &n); if (r < 0) return r; if (n == 0) id = SD_ID128_NULL; else if (n == 16) memcpy(&id, v, n); else return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid machine ID parameter"); r = sd_bus_message_read(message, "ssus", &service, &class, &leader, &root_directory); if (r < 0) return r; if (read_network) { r = sd_bus_message_read_array(message, 'i', (const void**) &netif, &n_netif); if (r < 0) return r; n_netif /= sizeof(int32_t); for (size_t i = 0; i < n_netif; i++) { if (netif[i] <= 0) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid network interface index %i", netif[i]); } } if (isempty(class)) c = _MACHINE_CLASS_INVALID; else { c = machine_class_from_string(class); if (c < 0) return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid machine class parameter"); } if (leader == 1) return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid leader PID"); if (!isempty(root_directory) && !path_is_absolute(root_directory)) return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Root directory must be empty or an absolute path"); if (leader == 0) { _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_PID, &creds); if (r < 0) return r; assert_cc(sizeof(uint32_t) == sizeof(pid_t)); r = sd_bus_creds_get_pid(creds, (pid_t*) &leader); if (r < 0) return r; } if (hashmap_get(manager->machines, name)) return sd_bus_error_setf(error, BUS_ERROR_MACHINE_EXISTS, "Machine '%s' already exists", name); r = manager_add_machine(manager, name, &m); if (r < 0) return r; m->leader = leader; m->class = c; m->id = id; if (!isempty(service)) { m->service = strdup(service); if (!m->service) { r = -ENOMEM; goto fail; } } if (!isempty(root_directory)) { m->root_directory = strdup(root_directory); if (!m->root_directory) { r = -ENOMEM; goto fail; } } if (n_netif > 0) { assert_cc(sizeof(int32_t) == sizeof(int)); m->netif = memdup(netif, sizeof(int32_t) * n_netif); if (!m->netif) { r = -ENOMEM; goto fail; } m->n_netif = n_netif; } *_m = m; return 1; fail: machine_add_to_gc_queue(m); return r; } static int method_create_machine_internal(sd_bus_message *message, bool read_network, void *userdata, sd_bus_error *error) { Manager *manager = ASSERT_PTR(userdata); Machine *m = NULL; int r; assert(message); r = method_create_or_register_machine(manager, message, read_network, &m, error); if (r < 0) return r; r = sd_bus_message_enter_container(message, 'a', "(sv)"); if (r < 0) goto fail; r = machine_start(m, message, error); if (r < 0) goto fail; m->create_message = sd_bus_message_ref(message); return 1; fail: machine_add_to_gc_queue(m); return r; } static int method_create_machine_with_network(sd_bus_message *message, void *userdata, sd_bus_error *error) { return method_create_machine_internal(message, true, userdata, error); } static int method_create_machine(sd_bus_message *message, void *userdata, sd_bus_error *error) { return method_create_machine_internal(message, false, userdata, error); } static int method_register_machine_internal(sd_bus_message *message, bool read_network, void *userdata, sd_bus_error *error) { Manager *manager = ASSERT_PTR(userdata); _cleanup_free_ char *p = NULL; Machine *m = NULL; int r; assert(message); r = method_create_or_register_machine(manager, message, read_network, &m, error); if (r < 0) return r; r = cg_pid_get_unit(m->leader, &m->unit); if (r < 0) { r = sd_bus_error_set_errnof(error, r, "Failed to determine unit of process "PID_FMT" : %m", m->leader); goto fail; } r = machine_start(m, NULL, error); if (r < 0) goto fail; p = machine_bus_path(m); if (!p) { r = -ENOMEM; goto fail; } return sd_bus_reply_method_return(message, "o", p); fail: machine_add_to_gc_queue(m); return r; } static int method_register_machine_with_network(sd_bus_message *message, void *userdata, sd_bus_error *error) { return method_register_machine_internal(message, true, userdata, error); } static int method_register_machine(sd_bus_message *message, void *userdata, sd_bus_error *error) { return method_register_machine_internal(message, false, userdata, error); } static int redirect_method_to_machine(sd_bus_message *message, Manager *m, sd_bus_error *error, sd_bus_message_handler_t method) { Machine *machine; const char *name; int r; assert(message); assert(m); assert(method); r = sd_bus_message_read(message, "s", &name); if (r < 0) return sd_bus_error_set_errno(error, r); machine = hashmap_get(m->machines, name); if (!machine) return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_MACHINE, "No machine '%s' known", name); return method(message, machine, error); } static int method_unregister_machine(sd_bus_message *message, void *userdata, sd_bus_error *error) { return redirect_method_to_machine(message, userdata, error, bus_machine_method_unregister); } static int method_terminate_machine(sd_bus_message *message, void *userdata, sd_bus_error *error) { return redirect_method_to_machine(message, userdata, error, bus_machine_method_terminate); } static int method_kill_machine(sd_bus_message *message, void *userdata, sd_bus_error *error) { return redirect_method_to_machine(message, userdata, error, bus_machine_method_kill); } static int method_get_machine_addresses(sd_bus_message *message, void *userdata, sd_bus_error *error) { return redirect_method_to_machine(message, userdata, error, bus_machine_method_get_addresses); } static int method_get_machine_os_release(sd_bus_message *message, void *userdata, sd_bus_error *error) { return redirect_method_to_machine(message, userdata, error, bus_machine_method_get_os_release); } 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; _unused_ Manager *m = ASSERT_PTR(userdata); Image *image; int r; assert(message); images = hashmap_new(&image_hash_ops); if (!images) return -ENOMEM; r = image_discover(IMAGE_MACHINE, NULL, images); 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', "(ssbttto)"); if (r < 0) return r; HASHMAP_FOREACH(image, images) { _cleanup_free_ char *p = NULL; p = image_bus_path(image->name); if (!p) return -ENOMEM; r = sd_bus_message_append(reply, "(ssbttto)", image->name, image_type_to_string(image->type), image->read_only, image->crtime, image->mtime, image->usage, 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 method_open_machine_pty(sd_bus_message *message, void *userdata, sd_bus_error *error) { return redirect_method_to_machine(message, userdata, error, bus_machine_method_open_pty); } static int method_open_machine_login(sd_bus_message *message, void *userdata, sd_bus_error *error) { return redirect_method_to_machine(message, userdata, error, bus_machine_method_open_login); } static int method_open_machine_shell(sd_bus_message *message, void *userdata, sd_bus_error *error) { return redirect_method_to_machine(message, userdata, error, bus_machine_method_open_shell); } static int method_bind_mount_machine(sd_bus_message *message, void *userdata, sd_bus_error *error) { return redirect_method_to_machine(message, userdata, error, bus_machine_method_bind_mount); } static int method_copy_machine(sd_bus_message *message, void *userdata, sd_bus_error *error) { return redirect_method_to_machine(message, userdata, error, bus_machine_method_copy); } static int method_open_machine_root_directory(sd_bus_message *message, void *userdata, sd_bus_error *error) { return redirect_method_to_machine(message, userdata, error, bus_machine_method_open_root_directory); } static int method_get_machine_uid_shift(sd_bus_message *message, void *userdata, sd_bus_error *error) { return redirect_method_to_machine(message, userdata, error, bus_machine_method_get_uid_shift); } static int redirect_method_to_image(sd_bus_message *message, Manager *m, sd_bus_error *error, sd_bus_message_handler_t method) { _cleanup_(image_unrefp) Image* i = NULL; const char *name; int r; assert(message); assert(m); assert(method); r = sd_bus_message_read(message, "s", &name); if (r < 0) return r; if (!image_name_is_valid(name)) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Image name '%s' is invalid.", name); r = image_find(IMAGE_MACHINE, name, NULL, &i); if (r == -ENOENT) return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_IMAGE, "No image '%s' known", name); if (r < 0) return r; i->userdata = m; return method(message, i, error); } static int method_remove_image(sd_bus_message *message, void *userdata, sd_bus_error *error) { return redirect_method_to_image(message, userdata, error, bus_image_method_remove); } static int method_rename_image(sd_bus_message *message, void *userdata, sd_bus_error *error) { return redirect_method_to_image(message, userdata, error, bus_image_method_rename); } static int method_clone_image(sd_bus_message *message, void *userdata, sd_bus_error *error) { return redirect_method_to_image(message, userdata, error, bus_image_method_clone); } static int method_mark_image_read_only(sd_bus_message *message, void *userdata, sd_bus_error *error) { return redirect_method_to_image(message, userdata, error, bus_image_method_mark_read_only); } static int method_get_image_hostname(sd_bus_message *message, void *userdata, sd_bus_error *error) { return redirect_method_to_image(message, userdata, error, bus_image_method_get_hostname); } static int method_get_image_machine_id(sd_bus_message *message, void *userdata, sd_bus_error *error) { return redirect_method_to_image(message, userdata, error, bus_image_method_get_machine_id); } static int method_get_image_machine_info(sd_bus_message *message, void *userdata, sd_bus_error *error) { return redirect_method_to_image(message, userdata, error, bus_image_method_get_machine_info); } static int method_get_image_os_release(sd_bus_message *message, void *userdata, sd_bus_error *error) { return redirect_method_to_image(message, userdata, error, bus_image_method_get_os_release); } static int clean_pool_done(Operation *operation, int ret, sd_bus_error *error) { _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; _cleanup_fclose_ FILE *f = NULL; bool success; size_t n; int r; assert(operation); assert(operation->extra_fd >= 0); if (lseek(operation->extra_fd, 0, SEEK_SET) == (off_t) -1) return -errno; f = take_fdopen(&operation->extra_fd, "r"); if (!f) return -errno; /* The resulting temporary file starts with a boolean value that indicates success or not. */ errno = 0; n = fread(&success, 1, sizeof(success), f); if (n != sizeof(success)) return ret < 0 ? ret : errno_or_else(EIO); if (ret < 0) { _cleanup_free_ char *name = NULL; /* The clean-up operation failed. In this case the resulting temporary file should contain a boolean * set to false followed by the name of the failed image. Let's try to read this and use it for the * error message. If we can't read it, don't mind, and return the naked error. */ if (success) /* The resulting temporary file could not be updated, ignore it. */ return ret; r = read_nul_string(f, LONG_LINE_MAX, &name); if (r <= 0) /* Same here... */ return ret; return sd_bus_error_set_errnof(error, ret, "Failed to remove image %s: %m", name); } assert(success); r = sd_bus_message_new_method_return(operation->message, &reply); if (r < 0) return r; r = sd_bus_message_open_container(reply, 'a', "(st)"); if (r < 0) return r; /* On success the resulting temporary file will contain a list of image names that were removed followed by * their size on disk. Let's read that and turn it into a bus message. */ for (;;) { _cleanup_free_ char *name = NULL; uint64_t size; r = read_nul_string(f, LONG_LINE_MAX, &name); if (r < 0) return r; if (r == 0) /* reached the end */ break; errno = 0; n = fread(&size, 1, sizeof(size), f); if (n != sizeof(size)) return errno_or_else(EIO); r = sd_bus_message_append(reply, "(st)", name, size); 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 method_clean_pool(sd_bus_message *message, void *userdata, sd_bus_error *error) { enum { REMOVE_ALL, REMOVE_HIDDEN, } mode; _cleanup_close_pair_ int errno_pipe_fd[2] = PIPE_EBADF; _cleanup_close_ int result_fd = -EBADF; Manager *m = userdata; Operation *operation; const char *mm; pid_t child; int r; assert(message); if (m->n_operations >= OPERATIONS_MAX) return sd_bus_error_set(error, SD_BUS_ERROR_LIMITS_EXCEEDED, "Too many ongoing operations."); r = sd_bus_message_read(message, "s", &mm); if (r < 0) return r; if (streq(mm, "all")) mode = REMOVE_ALL; else if (streq(mm, "hidden")) mode = REMOVE_HIDDEN; else return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unknown mode '%s'.", mm); const char *details[] = { "verb", "clean_pool", "mode", mm, NULL }; r = bus_verify_polkit_async( message, CAP_SYS_ADMIN, "org.freedesktop.machine1.manage-machines", details, false, UID_INVALID, &m->polkit_registry, error); if (r < 0) return r; if (r == 0) return 1; /* Will call us back */ if (pipe2(errno_pipe_fd, O_CLOEXEC|O_NONBLOCK) < 0) return sd_bus_error_set_errnof(error, errno, "Failed to create pipe: %m"); /* Create a temporary file we can dump information about deleted images into. We use a temporary file for this * instead of a pipe or so, since this might grow quit large in theory and we don't want to process this * continuously */ result_fd = open_tmpfile_unlinkable(NULL, O_RDWR|O_CLOEXEC); if (result_fd < 0) return -errno; /* This might be a slow operation, run it asynchronously in a background process */ r = safe_fork("(sd-clean)", FORK_RESET_SIGNALS, &child); if (r < 0) return sd_bus_error_set_errnof(error, r, "Failed to fork(): %m"); if (r == 0) { _cleanup_hashmap_free_ Hashmap *images = NULL; bool success = true; Image *image; ssize_t l; errno_pipe_fd[0] = safe_close(errno_pipe_fd[0]); images = hashmap_new(&image_hash_ops); if (!images) { r = -ENOMEM; goto child_fail; } r = image_discover(IMAGE_MACHINE, NULL, images); if (r < 0) goto child_fail; l = write(result_fd, &success, sizeof(success)); if (l < 0) { r = -errno; goto child_fail; } HASHMAP_FOREACH(image, images) { /* We can't remove vendor images (i.e. those in /usr) */ if (IMAGE_IS_VENDOR(image)) continue; if (IMAGE_IS_HOST(image)) continue; if (mode == REMOVE_HIDDEN && !IMAGE_IS_HIDDEN(image)) continue; r = image_remove(image); if (r == -EBUSY) /* keep images that are currently being used. */ continue; if (r < 0) { /* If the operation failed, let's override everything we wrote, and instead write there at which image we failed. */ success = false; (void) ftruncate(result_fd, 0); (void) lseek(result_fd, 0, SEEK_SET); (void) write(result_fd, &success, sizeof(success)); (void) write(result_fd, image->name, strlen(image->name)+1); goto child_fail; } l = write(result_fd, image->name, strlen(image->name)+1); if (l < 0) { r = -errno; goto child_fail; } l = write(result_fd, &image->usage_exclusive, sizeof(image->usage_exclusive)); if (l < 0) { r = -errno; goto child_fail; } } result_fd = safe_close(result_fd); _exit(EXIT_SUCCESS); child_fail: (void) write(errno_pipe_fd[1], &r, sizeof(r)); _exit(EXIT_FAILURE); } errno_pipe_fd[1] = safe_close(errno_pipe_fd[1]); /* The clean-up might take a while, hence install a watch on the child and return */ r = operation_new(m, NULL, child, message, errno_pipe_fd[0], &operation); if (r < 0) { (void) sigkill_wait(child); return r; } operation->extra_fd = result_fd; operation->done = clean_pool_done; result_fd = -EBADF; errno_pipe_fd[0] = -EBADF; return 1; } 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"); const char *details[] = { "verb", "set_pool_limit", NULL }; r = bus_verify_polkit_async( message, CAP_SYS_ADMIN, "org.freedesktop.machine1.manage-machines", details, false, UID_INVALID, &m->polkit_registry, error); if (r < 0) return r; if (r == 0) return 1; /* Will call us back */ /* Set up the machine directory if necessary */ r = setup_machine_directory(error, /* use_btrfs_subvol= */ true, /* use_btrfs_quota= */ true); if (r < 0) return r; (void) btrfs_qgroup_set_limit("/var/lib/machines", 0, limit); r = btrfs_subvol_set_subtree_quota_limit("/var/lib/machines", 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); } static int method_set_image_limit(sd_bus_message *message, void *userdata, sd_bus_error *error) { return redirect_method_to_image(message, userdata, error, bus_image_method_set_limit); } static int method_map_from_machine_user(sd_bus_message *message, void *userdata, sd_bus_error *error) { Manager *m = userdata; const char *name; Machine *machine; uint32_t uid; uid_t converted; int r; r = sd_bus_message_read(message, "su", &name, &uid); if (r < 0) return r; if (!uid_is_valid(uid)) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid user ID " UID_FMT, uid); machine = hashmap_get(m->machines, name); if (!machine) return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_MACHINE, "No machine '%s' known", name); if (machine->class != MACHINE_CONTAINER) return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Not supported for non-container machines."); r = machine_translate_uid(machine, uid, &converted); if (r == -ESRCH) return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_USER_MAPPING, "Machine '%s' has no matching user mappings.", name); if (r < 0) return r; return sd_bus_reply_method_return(message, "u", (uint32_t) converted); } static int method_map_to_machine_user(sd_bus_message *message, void *userdata, sd_bus_error *error) { _cleanup_free_ char *o = NULL; Manager *m = userdata; Machine *machine; uid_t uid, converted; int r; r = sd_bus_message_read(message, "u", &uid); if (r < 0) return r; if (!uid_is_valid(uid)) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid user ID " UID_FMT, uid); if (uid < 0x10000) return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_USER_MAPPING, "User " UID_FMT " belongs to host UID range", uid); r = manager_find_machine_for_uid(m, uid, &machine, &converted); if (r < 0) return r; if (!r) return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_USER_MAPPING, "No matching user mapping for " UID_FMT ".", uid); o = machine_bus_path(machine); if (!o) return -ENOMEM; return sd_bus_reply_method_return(message, "sou", machine->name, o, (uint32_t) converted); } static int method_map_from_machine_group(sd_bus_message *message, void *userdata, sd_bus_error *error) { Manager *m = userdata; const char *name; Machine *machine; gid_t converted; uint32_t gid; int r; r = sd_bus_message_read(message, "su", &name, &gid); if (r < 0) return r; if (!gid_is_valid(gid)) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid group ID " GID_FMT, gid); machine = hashmap_get(m->machines, name); if (!machine) return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_MACHINE, "No machine '%s' known", name); if (machine->class != MACHINE_CONTAINER) return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Not supported for non-container machines."); r = machine_translate_gid(machine, gid, &converted); if (r == -ESRCH) return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_USER_MAPPING, "Machine '%s' has no matching group mappings.", name); if (r < 0) return r; return sd_bus_reply_method_return(message, "u", (uint32_t) converted); } static int method_map_to_machine_group(sd_bus_message *message, void *userdata, sd_bus_error *error) { _cleanup_free_ char *o = NULL; Manager *m = userdata; Machine *machine; gid_t gid, converted; int r; r = sd_bus_message_read(message, "u", &gid); if (r < 0) return r; if (!gid_is_valid(gid)) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid group ID " GID_FMT, gid); if (gid < 0x10000) return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_GROUP_MAPPING, "Group " GID_FMT " belongs to host GID range", gid); r = manager_find_machine_for_gid(m, gid, &machine, &converted); if (r < 0) return r; if (!r) return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_GROUP_MAPPING, "No matching group mapping for " GID_FMT ".", gid); o = machine_bus_path(machine); if (!o) return -ENOMEM; return sd_bus_reply_method_return(message, "sou", machine->name, o, (uint32_t) converted); } 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_METHOD_WITH_ARGS("GetMachine", SD_BUS_ARGS("s", name), SD_BUS_RESULT("o", machine), method_get_machine, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("GetImage", SD_BUS_ARGS("s", name), SD_BUS_RESULT("o", image), method_get_image, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("GetMachineByPID", SD_BUS_ARGS("u", pid), SD_BUS_RESULT("o", machine), method_get_machine_by_pid, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("ListMachines", SD_BUS_NO_ARGS, SD_BUS_RESULT("a(ssso)", machines), method_list_machines, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("ListImages", SD_BUS_NO_ARGS, SD_BUS_RESULT("a(ssbttto)", images), method_list_images, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("CreateMachine", SD_BUS_ARGS("s", name, "ay", id, "s", service, "s", class, "u", leader, "s", root_directory, "a(sv)", scope_properties), SD_BUS_RESULT("o", path), method_create_machine, 0), SD_BUS_METHOD_WITH_ARGS("CreateMachineWithNetwork", SD_BUS_ARGS("s", name, "ay", id, "s", service, "s", class, "u", leader, "s", root_directory, "ai", ifindices, "a(sv)", scope_properties), SD_BUS_RESULT("o", path), method_create_machine_with_network, 0), SD_BUS_METHOD_WITH_ARGS("RegisterMachine", SD_BUS_ARGS("s", name, "ay", id, "s", service, "s", class, "u", leader, "s", root_directory), SD_BUS_RESULT("o", path), method_register_machine, 0), SD_BUS_METHOD_WITH_ARGS("RegisterMachineWithNetwork", SD_BUS_ARGS("s", name, "ay", id, "s", service, "s", class, "u", leader, "s", root_directory, "ai", ifindices), SD_BUS_RESULT("o", path), method_register_machine_with_network, 0), SD_BUS_METHOD_WITH_ARGS("UnregisterMachine", SD_BUS_ARGS("s", name), SD_BUS_NO_RESULT, method_unregister_machine, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("TerminateMachine", SD_BUS_ARGS("s", id), SD_BUS_NO_RESULT, method_terminate_machine, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("KillMachine", SD_BUS_ARGS("s", name, "s", who, "i", signal), SD_BUS_NO_RESULT, method_kill_machine, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("GetMachineAddresses", SD_BUS_ARGS("s", name), SD_BUS_RESULT("a(iay)", addresses), method_get_machine_addresses, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("GetMachineOSRelease", SD_BUS_ARGS("s", name), SD_BUS_RESULT("a{ss}", fields), method_get_machine_os_release, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("OpenMachinePTY", SD_BUS_ARGS("s", name), SD_BUS_RESULT("h", pty, "s", pty_path), method_open_machine_pty, 0), SD_BUS_METHOD_WITH_ARGS("OpenMachineLogin", SD_BUS_ARGS("s", name), SD_BUS_RESULT("h", pty, "s", pty_path), method_open_machine_login, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("OpenMachineShell", SD_BUS_ARGS("s", name, "s", user, "s", path, "as", args, "as", environment), SD_BUS_RESULT("h", pty, "s", pty_path), method_open_machine_shell, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("BindMountMachine", SD_BUS_ARGS("s", name, "s", source, "s", destination, "b", read_only, "b", mkdir), SD_BUS_NO_RESULT, method_bind_mount_machine, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("CopyFromMachine", SD_BUS_ARGS("s", name, "s", source, "s", destination), SD_BUS_NO_RESULT, method_copy_machine, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("CopyToMachine", SD_BUS_ARGS("s", name, "s", source, "s", destination), SD_BUS_NO_RESULT, method_copy_machine, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("CopyFromMachineWithFlags", SD_BUS_ARGS("s", name, "s", source, "s", destination, "t", flags), SD_BUS_NO_RESULT, method_copy_machine, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("CopyToMachineWithFlags", SD_BUS_ARGS("s", name, "s", source, "s", destination, "t", flags), SD_BUS_NO_RESULT, method_copy_machine, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("OpenMachineRootDirectory", SD_BUS_ARGS("s", name), SD_BUS_RESULT("h", fd), method_open_machine_root_directory, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("GetMachineUIDShift", SD_BUS_ARGS("s", name), SD_BUS_RESULT("u", shift), method_get_machine_uid_shift, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("RemoveImage", SD_BUS_ARGS("s", name), SD_BUS_NO_RESULT, method_remove_image, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("RenameImage", SD_BUS_ARGS("s", name, "s", new_name), SD_BUS_NO_RESULT, method_rename_image, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("CloneImage", SD_BUS_ARGS("s", name, "s", new_name, "b", read_only), SD_BUS_NO_RESULT, method_clone_image, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("MarkImageReadOnly", SD_BUS_ARGS("s", name, "b", read_only), SD_BUS_NO_RESULT, method_mark_image_read_only, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("GetImageHostname", SD_BUS_ARGS("s", name), SD_BUS_RESULT("s", hostname), method_get_image_hostname, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("GetImageMachineID", SD_BUS_ARGS("s", name), SD_BUS_RESULT("ay", id), method_get_image_machine_id, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("GetImageMachineInfo", SD_BUS_ARGS("s", name), SD_BUS_RESULT("a{ss}", machine_info), method_get_image_machine_info, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("GetImageOSRelease", SD_BUS_ARGS("s", name), SD_BUS_RESULT("a{ss}", os_release), method_get_image_os_release, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("SetPoolLimit", SD_BUS_ARGS("t", size), SD_BUS_NO_RESULT, method_set_pool_limit, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("SetImageLimit", SD_BUS_ARGS("s", name, "t", size), SD_BUS_NO_RESULT, method_set_image_limit, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("CleanPool", SD_BUS_ARGS("s", mode), SD_BUS_RESULT("a(st)",images), method_clean_pool, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("MapFromMachineUser", SD_BUS_ARGS("s", name, "u", uid_inner), SD_BUS_RESULT("u", uid_outer), method_map_from_machine_user, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("MapToMachineUser", SD_BUS_ARGS("u", uid_outer), SD_BUS_RESULT("s", machine_name, "o", machine_path, "u", uid_inner), method_map_to_machine_user, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("MapFromMachineGroup", SD_BUS_ARGS("s", name, "u", gid_inner), SD_BUS_RESULT("u", gid_outer), method_map_from_machine_group, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("MapToMachineGroup", SD_BUS_ARGS("u", gid_outer), SD_BUS_RESULT("s", machine_name, "o", machine_path, "u", gid_inner), method_map_to_machine_group, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_SIGNAL_WITH_ARGS("MachineNew", SD_BUS_ARGS("s", machine, "o", path), 0), SD_BUS_SIGNAL_WITH_ARGS("MachineRemoved", SD_BUS_ARGS("s", machine, "o", path), 0), SD_BUS_VTABLE_END }; const BusObjectImplementation manager_object = { "/org/freedesktop/machine1", "org.freedesktop.machine1.Manager", .vtables = BUS_VTABLES(manager_vtable), .children = BUS_IMPLEMENTATIONS( &machine_object, &image_object ), }; int match_job_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) { const char *path, *result, *unit; Manager *m = ASSERT_PTR(userdata); Machine *machine; uint32_t id; int r; assert(message); r = sd_bus_message_read(message, "uoss", &id, &path, &unit, &result); if (r < 0) { bus_log_parse_error(r); return 0; } machine = hashmap_get(m->machine_units, unit); if (!machine) return 0; if (streq_ptr(path, machine->scope_job)) { machine->scope_job = mfree(machine->scope_job); if (machine->started) { if (streq(result, "done")) machine_send_create_reply(machine, NULL); else { _cleanup_(sd_bus_error_free) sd_bus_error e = SD_BUS_ERROR_NULL; sd_bus_error_setf(&e, BUS_ERROR_JOB_FAILED, "Start job for unit %s failed with '%s'", unit, result); machine_send_create_reply(machine, &e); } } machine_save(machine); } machine_add_to_gc_queue(machine); return 0; } int match_properties_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) { _cleanup_free_ char *unit = NULL; const char *path; Manager *m = ASSERT_PTR(userdata); Machine *machine; int r; assert(message); path = sd_bus_message_get_path(message); if (!path) return 0; r = unit_name_from_dbus_path(path, &unit); if (r == -EINVAL) /* not for a unit */ return 0; if (r < 0) { log_oom(); return 0; } machine = hashmap_get(m->machine_units, unit); if (!machine) return 0; machine_add_to_gc_queue(machine); return 0; } int match_unit_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) { const char *path, *unit; Manager *m = ASSERT_PTR(userdata); Machine *machine; int r; assert(message); r = sd_bus_message_read(message, "so", &unit, &path); if (r < 0) { bus_log_parse_error(r); return 0; } machine = hashmap_get(m->machine_units, unit); if (!machine) return 0; machine_add_to_gc_queue(machine); return 0; } int match_reloading(sd_bus_message *message, void *userdata, sd_bus_error *error) { Manager *m = ASSERT_PTR(userdata); Machine *machine; int b, r; assert(message); r = sd_bus_message_read(message, "b", &b); if (r < 0) { bus_log_parse_error(r); return 0; } if (b) return 0; /* systemd finished reloading, let's recheck all our machines */ log_debug("System manager has been reloaded, rechecking machines..."); HASHMAP_FOREACH(machine, m->machines) machine_add_to_gc_queue(machine); return 0; } int manager_unref_unit( Manager *m, const char *unit, sd_bus_error *error) { assert(m); assert(unit); return bus_call_method(m->bus, bus_systemd_mgr, "UnrefUnit", error, NULL, "s", unit); } int manager_stop_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) { _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; int r; assert(manager); assert(unit); r = bus_call_method(manager->bus, bus_systemd_mgr, "StopUnit", error, &reply, "ss", unit, "fail"); if (r < 0) { if (sd_bus_error_has_names(error, BUS_ERROR_NO_SUCH_UNIT, BUS_ERROR_LOAD_FAILED)) { if (job) *job = NULL; sd_bus_error_free(error); return 0; } return r; } if (job) { const char *j; char *copy; r = sd_bus_message_read(reply, "o", &j); if (r < 0) return r; copy = strdup(j); if (!copy) return -ENOMEM; *job = copy; } return 1; } int manager_kill_unit(Manager *manager, const char *unit, int signo, sd_bus_error *error) { assert(manager); assert(unit); return bus_call_method(manager->bus, bus_systemd_mgr, "KillUnit", error, NULL, "ssi", unit, "all", signo); } int manager_unit_is_active(Manager *manager, const char *unit) { _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; _cleanup_free_ char *path = NULL; const char *state; int r; assert(manager); assert(unit); path = unit_dbus_path_from_name(unit); if (!path) return -ENOMEM; r = sd_bus_get_property( manager->bus, "org.freedesktop.systemd1", path, "org.freedesktop.systemd1.Unit", "ActiveState", &error, &reply, "s"); if (r < 0) { if (sd_bus_error_has_names(&error, SD_BUS_ERROR_NO_REPLY, SD_BUS_ERROR_DISCONNECTED)) return true; if (sd_bus_error_has_names(&error, BUS_ERROR_NO_SUCH_UNIT, BUS_ERROR_LOAD_FAILED)) return false; return r; } r = sd_bus_message_read(reply, "s", &state); if (r < 0) return -EINVAL; return !STR_IN_SET(state, "inactive", "failed"); } int manager_job_is_active(Manager *manager, const char *path) { _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; int r; assert(manager); assert(path); r = sd_bus_get_property( manager->bus, "org.freedesktop.systemd1", path, "org.freedesktop.systemd1.Job", "State", &error, &reply, "s"); if (r < 0) { if (sd_bus_error_has_names(&error, SD_BUS_ERROR_NO_REPLY, SD_BUS_ERROR_DISCONNECTED)) return true; if (sd_bus_error_has_name(&error, SD_BUS_ERROR_UNKNOWN_OBJECT)) return false; return r; } /* We don't actually care about the state really. The fact * that we could read the job state is enough for us */ return true; } int manager_get_machine_by_pid(Manager *m, pid_t pid, Machine **machine) { Machine *mm; int r; assert(m); assert(pid >= 1); assert(machine); mm = hashmap_get(m->machine_leaders, PID_TO_PTR(pid)); if (!mm) { _cleanup_free_ char *unit = NULL; r = cg_pid_get_unit(pid, &unit); if (r >= 0) mm = hashmap_get(m->machine_units, unit); } if (!mm) return 0; *machine = mm; return 1; } int manager_add_machine(Manager *m, const char *name, Machine **_machine) { Machine *machine; int r; assert(m); assert(name); machine = hashmap_get(m->machines, name); if (!machine) { r = machine_new(m, _MACHINE_CLASS_INVALID, name, &machine); if (r < 0) return r; } if (_machine) *_machine = machine; return 0; }