| /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
| |
| #include <sys/file.h> |
| #include <sys/mount.h> |
| |
| #include "alloc-util.h" |
| #include "bus-get-properties.h" |
| #include "bus-label.h" |
| #include "bus-polkit.h" |
| #include "copy.h" |
| #include "discover-image.h" |
| #include "dissect-image.h" |
| #include "fd-util.h" |
| #include "fileio.h" |
| #include "fs-util.h" |
| #include "image-dbus.h" |
| #include "io-util.h" |
| #include "loop-util.h" |
| #include "missing_capability.h" |
| #include "mount-util.h" |
| #include "os-util.h" |
| #include "process-util.h" |
| #include "raw-clone.h" |
| #include "strv.h" |
| #include "user-util.h" |
| |
| static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_type, image_type, ImageType); |
| |
| int bus_image_method_remove( |
| sd_bus_message *message, |
| void *userdata, |
| sd_bus_error *error) { |
| |
| _cleanup_close_pair_ int errno_pipe_fd[2] = PIPE_EBADF; |
| Image *image = ASSERT_PTR(userdata); |
| Manager *m = image->userdata; |
| 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."); |
| |
| const char *details[] = { |
| "image", image->name, |
| "verb", "remove", |
| NULL |
| }; |
| |
| r = bus_verify_polkit_async( |
| message, |
| CAP_SYS_ADMIN, |
| "org.freedesktop.machine1.manage-images", |
| 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"); |
| |
| r = safe_fork("(sd-imgrm)", FORK_RESET_SIGNALS, &child); |
| if (r < 0) |
| return sd_bus_error_set_errnof(error, r, "Failed to fork(): %m"); |
| if (r == 0) { |
| errno_pipe_fd[0] = safe_close(errno_pipe_fd[0]); |
| |
| r = image_remove(image); |
| if (r < 0) { |
| (void) write(errno_pipe_fd[1], &r, sizeof(r)); |
| _exit(EXIT_FAILURE); |
| } |
| |
| _exit(EXIT_SUCCESS); |
| } |
| |
| errno_pipe_fd[1] = safe_close(errno_pipe_fd[1]); |
| |
| r = operation_new(m, NULL, child, message, errno_pipe_fd[0], NULL); |
| if (r < 0) { |
| (void) sigkill_wait(child); |
| return r; |
| } |
| |
| errno_pipe_fd[0] = -EBADF; |
| |
| return 1; |
| } |
| |
| int bus_image_method_rename( |
| sd_bus_message *message, |
| void *userdata, |
| sd_bus_error *error) { |
| |
| Image *image = ASSERT_PTR(userdata); |
| Manager *m = image->userdata; |
| const char *new_name; |
| int r; |
| |
| assert(message); |
| |
| 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); |
| |
| const char *details[] = { |
| "image", image->name, |
| "verb", "rename", |
| "new_name", new_name, |
| NULL |
| }; |
| |
| r = bus_verify_polkit_async( |
| message, |
| CAP_SYS_ADMIN, |
| "org.freedesktop.machine1.manage-images", |
| details, |
| 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_message *message, |
| void *userdata, |
| sd_bus_error *error) { |
| |
| _cleanup_close_pair_ int errno_pipe_fd[2] = PIPE_EBADF; |
| Image *image = ASSERT_PTR(userdata); |
| Manager *m = ASSERT_PTR(image->userdata); |
| const char *new_name; |
| int r, read_only; |
| pid_t child; |
| |
| 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, "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); |
| |
| const char *details[] = { |
| "image", image->name, |
| "verb", "clone", |
| "new_name", new_name, |
| NULL |
| }; |
| |
| r = bus_verify_polkit_async( |
| message, |
| CAP_SYS_ADMIN, |
| "org.freedesktop.machine1.manage-images", |
| 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"); |
| |
| r = safe_fork("(sd-imgclone)", FORK_RESET_SIGNALS, &child); |
| if (r < 0) |
| return sd_bus_error_set_errnof(error, r, "Failed to fork(): %m"); |
| if (r == 0) { |
| errno_pipe_fd[0] = safe_close(errno_pipe_fd[0]); |
| |
| r = image_clone(image, new_name, read_only); |
| if (r < 0) { |
| (void) write(errno_pipe_fd[1], &r, sizeof(r)); |
| _exit(EXIT_FAILURE); |
| } |
| |
| _exit(EXIT_SUCCESS); |
| } |
| |
| errno_pipe_fd[1] = safe_close(errno_pipe_fd[1]); |
| |
| r = operation_new(m, NULL, child, message, errno_pipe_fd[0], NULL); |
| if (r < 0) { |
| (void) sigkill_wait(child); |
| return r; |
| } |
| |
| errno_pipe_fd[0] = -EBADF; |
| |
| return 1; |
| } |
| |
| int bus_image_method_mark_read_only( |
| sd_bus_message *message, |
| void *userdata, |
| sd_bus_error *error) { |
| |
| Image *image = userdata; |
| Manager *m = image->userdata; |
| int read_only, r; |
| |
| assert(message); |
| |
| r = sd_bus_message_read(message, "b", &read_only); |
| if (r < 0) |
| return r; |
| |
| const char *details[] = { |
| "image", image->name, |
| "verb", "mark_read_only", |
| "read_only", one_zero(read_only), |
| NULL |
| }; |
| |
| r = bus_verify_polkit_async( |
| message, |
| CAP_SYS_ADMIN, |
| "org.freedesktop.machine1.manage-images", |
| details, |
| 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_message *message, |
| void *userdata, |
| sd_bus_error *error) { |
| |
| Image *image = userdata; |
| Manager *m = image->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[] = { |
| "machine", image->name, |
| "verb", "set_limit", |
| NULL |
| }; |
| |
| r = bus_verify_polkit_async( |
| message, |
| CAP_SYS_ADMIN, |
| "org.freedesktop.machine1.manage-images", |
| details, |
| 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); |
| } |
| |
| int bus_image_method_get_hostname( |
| sd_bus_message *message, |
| void *userdata, |
| sd_bus_error *error) { |
| |
| Image *image = userdata; |
| int r; |
| |
| if (!image->metadata_valid) { |
| r = image_read_metadata(image); |
| if (r < 0) |
| return sd_bus_error_set_errnof(error, r, "Failed to read image metadata: %m"); |
| } |
| |
| return sd_bus_reply_method_return(message, "s", image->hostname); |
| } |
| |
| int bus_image_method_get_machine_id( |
| sd_bus_message *message, |
| void *userdata, |
| sd_bus_error *error) { |
| |
| _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; |
| Image *image = userdata; |
| int r; |
| |
| if (!image->metadata_valid) { |
| r = image_read_metadata(image); |
| if (r < 0) |
| return sd_bus_error_set_errnof(error, r, "Failed to read image metadata: %m"); |
| } |
| |
| r = sd_bus_message_new_method_return(message, &reply); |
| if (r < 0) |
| return r; |
| |
| if (sd_id128_is_null(image->machine_id)) /* Add an empty array if the ID is zero */ |
| r = sd_bus_message_append(reply, "ay", 0); |
| else |
| r = sd_bus_message_append_array(reply, 'y', image->machine_id.bytes, 16); |
| if (r < 0) |
| return r; |
| |
| return sd_bus_send(NULL, reply, NULL); |
| } |
| |
| int bus_image_method_get_machine_info( |
| sd_bus_message *message, |
| void *userdata, |
| sd_bus_error *error) { |
| |
| Image *image = userdata; |
| int r; |
| |
| if (!image->metadata_valid) { |
| r = image_read_metadata(image); |
| if (r < 0) |
| return sd_bus_error_set_errnof(error, r, "Failed to read image metadata: %m"); |
| } |
| |
| return bus_reply_pair_array(message, image->machine_info); |
| } |
| |
| int bus_image_method_get_os_release( |
| sd_bus_message *message, |
| void *userdata, |
| sd_bus_error *error) { |
| |
| Image *image = userdata; |
| int r; |
| |
| if (!image->metadata_valid) { |
| r = image_read_metadata(image); |
| if (r < 0) |
| return sd_bus_error_set_errnof(error, r, "Failed to read image metadata: %m"); |
| } |
| |
| return bus_reply_pair_array(message, image->os_release); |
| } |
| |
| static int image_flush_cache(sd_event_source *s, void *userdata) { |
| Manager *m = ASSERT_PTR(userdata); |
| |
| assert(s); |
| |
| hashmap_clear(m->image_cache); |
| return 0; |
| } |
| |
| static 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; |
| } |
| |
| 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(IMAGE_MACHINE, e, NULL, &image); |
| if (r == -ENOENT) |
| return 0; |
| if (r < 0) |
| return r; |
| |
| image->userdata = m; |
| |
| r = hashmap_ensure_put(&m->image_cache, &image_hash_ops, 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 strjoin("/org/freedesktop/machine1/image/", e); |
| } |
| |
| static int image_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error) { |
| _cleanup_hashmap_free_ Hashmap *images = NULL; |
| _cleanup_strv_free_ char **l = NULL; |
| Image *image; |
| int r; |
| |
| assert(bus); |
| assert(path); |
| assert(nodes); |
| |
| images = hashmap_new(&image_hash_ops); |
| if (!images) |
| return -ENOMEM; |
| |
| r = image_discover(IMAGE_MACHINE, NULL, images); |
| if (r < 0) |
| return r; |
| |
| HASHMAP_FOREACH(image, images) { |
| char *p; |
| |
| p = image_bus_path(image->name); |
| if (!p) |
| return -ENOMEM; |
| |
| r = strv_consume(&l, p); |
| if (r < 0) |
| return r; |
| } |
| |
| *nodes = TAKE_PTR(l); |
| |
| return 1; |
| } |
| |
| 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_METHOD("GetHostname", NULL, "s", bus_image_method_get_hostname, SD_BUS_VTABLE_UNPRIVILEGED), |
| SD_BUS_METHOD("GetMachineID", NULL, "ay", bus_image_method_get_machine_id, SD_BUS_VTABLE_UNPRIVILEGED), |
| SD_BUS_METHOD("GetMachineInfo", NULL, "a{ss}", bus_image_method_get_machine_info, SD_BUS_VTABLE_UNPRIVILEGED), |
| SD_BUS_METHOD("GetOSRelease", NULL, "a{ss}", bus_image_method_get_os_release, SD_BUS_VTABLE_UNPRIVILEGED), |
| SD_BUS_VTABLE_END |
| }; |
| |
| const BusObjectImplementation image_object = { |
| "/org/freedesktop/machine1/image", |
| "org.freedesktop.machine1.Image", |
| .fallback_vtables = BUS_FALLBACK_VTABLES({image_vtable, image_object_find}), |
| .node_enumerator = image_node_enumerator, |
| }; |
