+ return TRUE;
+}
+
+/* Convert an in-memory cloud log item to a more serialized form, suitable
+ * either for writing to the local journal or the the cloud. */
+void bluesky_serialize_cloudlog(BlueSkyCloudLog *log,
+ GString *encrypted, // Raw data payload
+ GString *authenticated, // Block links
+ GString *writable) // Writable block links
+{
+ g_string_append_len(encrypted, log->data->data, log->data->len);
+ for (int i = 0; i < log->links->len; i++) {
+ BlueSkyCloudLog *ref = g_array_index(log->links, BlueSkyCloudLog *, i);
+ if (ref != NULL) {
+ g_string_append_len(authenticated,
+ (const char *)&ref->id,
+ sizeof(BlueSkyCloudID));
+ // TODO: Fix endianness of output
+ g_string_append_len(writable,
+ (const char *)&ref->location,
+ sizeof(ref->location));
+ } else {
+ BlueSkyCloudID id;
+ memset(&id, 0, sizeof(id));
+ g_string_append_len(authenticated, (const char *)&id, sizeof(id));
+ }
+ }
+}
+
+/* Deserialize data from the journal or a cloud segment back into the in-memory
+ * cloud log item format. */
+void bluesky_deserialize_cloudlog(BlueSkyCloudLog *item,
+ const char *data,
+ size_t len)
+{
+ const char *data1, *data2, *data3;
+ size_t len1, len2, len3;
+ int type;
+ BlueSkyCloudID id;
+ g_assert(len > 4);
+
+ /* Auto-detect the format: either the journal or cloud log, based on the
+ * magic number at the start */
+ if (memcmp(data, JOURNAL_MAGIC, 4) == 0) {
+ g_assert(len >= sizeof(struct log_header));
+ struct log_header *header = (struct log_header *)data;
+ type = header->type - '0';
+ len1 = GUINT32_FROM_LE(header->size1);
+ len2 = GUINT32_FROM_LE(header->size2);
+ len3 = GUINT32_FROM_LE(header->size3);
+ id = header->id;
+ data1 = data + sizeof(struct log_header);
+ data2 = data1 + len1;
+ data3 = data2 + len2;
+ g_assert(data3 + len3 - data <= len);
+ item->type = header->type - '0';
+ item->inum = GUINT64_FROM_LE(header->inum);
+ } else if (memcmp(data, CLOUDLOG_MAGIC, 4) == 0) {
+ g_assert(len >= sizeof(struct cloudlog_header));
+ struct cloudlog_header *header = (struct cloudlog_header *)data;
+ type = header->type - '0';
+ len1 = GUINT32_FROM_LE(header->size1);
+ len2 = GUINT32_FROM_LE(header->size2);
+ len3 = GUINT32_FROM_LE(header->size3);
+ id = header->id;
+ data1 = data + sizeof(struct cloudlog_header);
+ data2 = data1 + len1;
+ data3 = data2 + len2;
+ g_assert(data3 + len3 - data <= len);
+ item->type = header->type - '0';
+ item->inum = GUINT64_FROM_LE(header->inum);
+ } else {
+ g_warning("Deserializing garbage cloud log item!");
+ return;
+ }
+
+ if (memcmp(&id, &item->id, sizeof(BlueSkyCloudID)) != 0) {
+ g_warning("ID does not match expected value!\n");
+ }
+
+ BlueSkyFS *fs = item->fs;
+
+ bluesky_string_unref(item->data);
+ item->data = NULL;
+ item->data_size = len1;
+
+ int link_count = len2 / sizeof(BlueSkyCloudID);
+ GArray *new_links = g_array_new(FALSE, TRUE, sizeof(BlueSkyCloudLog *));
+ for (int i = 0; i < link_count; i++) {
+ BlueSkyCloudID id;
+ g_assert(len2 >= sizeof(id));
+ memcpy(&id, data2, sizeof(id));
+ data2 += sizeof(id); len2 -= sizeof(id);
+
+ BlueSkyCloudLog *ref = bluesky_cloudlog_get(fs, id);
+ if (ref != NULL) {
+ g_mutex_lock(ref->lock);
+ g_assert(len3 >= sizeof(ref->location));
+ memcpy(&ref->location, data3, sizeof(ref->location));
+ ref->location_flags |= CLOUDLOG_CLOUD;
+ data3 += sizeof(ref->location); len3 -= sizeof(ref->location);
+ g_mutex_unlock(ref->lock);
+ }
+
+ g_array_append_val(new_links, ref);
+ }
+
+ for (int i = 0; i < item->links->len; i++) {
+ BlueSkyCloudLog *c = g_array_index(item->links,
+ BlueSkyCloudLog *, i);
+ bluesky_cloudlog_unref(c);
+ }
+ g_array_unref(item->links);
+ item->links = new_links;