diff options
Diffstat (limited to 'src/portable/portabled-bus.c')
| -rw-r--r-- | src/portable/portabled-bus.c | 403 |
1 files changed, 403 insertions, 0 deletions
diff --git a/src/portable/portabled-bus.c b/src/portable/portabled-bus.c new file mode 100644 index 0000000..3cbdb0b --- /dev/null +++ b/src/portable/portabled-bus.c @@ -0,0 +1,403 @@ +/* SPDX-License-Identifier: LGPL-2.1+ */ + +#include "alloc-util.h" +#include "btrfs-util.h" +#include "bus-common-errors.h" +#include "bus-util.h" +#include "fd-util.h" +#include "io-util.h" +#include "machine-image.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_t) -1; + + 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_t) -1; + + 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; + Iterator i; + 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, i) { + _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, + 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) { + 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; + + r = portable_get_state( + sd_bus_message_get_bus(message), + name_or_path, + 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) { + PortableChange *changes = NULL; + Manager *m = userdata; + size_t n_changes = 0; + const char *name_or_path; + int r, runtime; + + 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, "sb", &name_or_path, &runtime); + if (r < 0) + return r; + + 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, + runtime ? PORTABLE_RUNTIME : 0, + &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_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_setf(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_setf(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("GetImage", "s", "o", method_get_image, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("ListImages", NULL, "a(ssbtttso)", method_list_images, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("GetImageOSRelease", "s", "a{ss}", method_get_image_os_release, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("GetImageState", "s", "s", method_get_image_state, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("GetImageMetadata", "sas", "saya{say}", method_get_image_metadata, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("AttachImage", "sassbs", "a(sss)", method_attach_image, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("DetachImage", "sb", "a(sss)", method_detach_image, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("RemoveImage", "s", NULL, method_remove_image, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("MarkImageReadOnly", "sb", NULL, method_mark_image_read_only, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("SetImageLimit", "st", NULL, method_set_image_limit, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("SetPoolLimit", "t", NULL, method_set_pool_limit, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_VTABLE_END +}; + +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; + size_t i; + int r; + + assert(m); + assert(changes || n_changes == 0); + + r = sd_bus_message_new_method_return(m, &reply); + if (r < 0) + return r; + + r = sd_bus_message_open_container(reply, 'a', "(sss)"); + if (r < 0) + return r; + + for (i = 0; i < n_changes; i++) { + r = sd_bus_message_append(reply, "(sss)", + portable_change_type_to_string(changes[i].type), + changes[i].path, + changes[i].source); + if (r < 0) + return r; + } + + r = sd_bus_message_close_container(reply); + if (r < 0) + return r; + + return sd_bus_send(NULL, reply, NULL); +} |