1 files changed, 68 insertions, 0 deletions
diff --git a/storage/src/vespa/storageapi/mbusprot/protobuf/common.proto b/storage/src/vespa/storageapi/mbusprot/protobuf/common.proto
new file mode 100644
index 00000000000..49e1a8f8aba
--- /dev/null
+++ b/storage/src/vespa/storageapi/mbusprot/protobuf/common.proto
@@ -0,0 +1,68 @@
+// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+syntax = "proto3";
+
+option cc_enable_arenas = true;
+
+package storage.mbusprot.protobuf;
+
+// Note: we use a *Request/*Response naming convention rather than *Command/*Reply,
+// as the former is the gRPC convention and that's where we intend to move.
+
+message BucketSpace {
+   uint64 space_id = 1;
+}
+
+message BucketId {
+   fixed64 raw_id = 1;
+}
+
+message Bucket {
+    uint64  space_id      = 1;
+    fixed64 raw_bucket_id = 2;
+}
+
+// Next tag to use: 3
+message BucketInfo {
+    uint64  last_modified_timestamp = 1;
+    fixed32 legacy_checksum = 2;
+    // TODO v2 checksum
+    uint32  doc_count       = 3;
+    uint32  total_doc_size  = 4;
+    uint32  meta_count      = 5;
+    uint32  used_file_size  = 6;
+    bool    ready           = 7;
+    bool    active          = 8;
+}
+
+message GlobalId {
+    // 96 bits of GID data in _little_ endian. High entropy, so fixed encoding is better than varint.
+    // Low 64 bits as if memcpy()ed from bytes [0, 8) of the GID buffer
+    fixed64 lo_64 = 1;
+    // High 32 bits as if memcpy()ed from bytes [8, 12) of the GID buffer
+    fixed32 hi_32 = 2;
+}
+
+// TODO these should ideally be gRPC headers..
+message RequestHeader {
+    uint64  message_id   = 1;
+    uint32  priority     = 2; // Always in range [0, 255]
+    uint32  source_index = 3; // Always in range [0, 65535]
+    fixed32 loadtype_id  = 4; // It's a hash with high entropy, so fixed encoding is better than varint
+}
+
+// TODO these should ideally be gRPC headers..
+message ResponseHeader {
+    // TODO this should ideally be gRPC Status...
+    uint32 return_code_id      = 1;
+    bytes  return_code_message = 2; // FIXME it's `bytes` since `string` will check for UTF-8... might not hold...
+    uint64 message_id          = 3;
+    uint32 priority            = 4; // Always in range [0, 255]
+}
+
+message Document {
+    bytes payload = 1;
+}
+
+message DocumentId {
+    bytes id = 1;
+}