syntax = "proto3";

package cuddlyproto;

enum StatusEnum {
  OK      = 0;
  E_UNKWN = 1;    // Unknown error
  E_NOENT = 2;    // File does not exist
  E_NOBLK = 3;    // Block does not exist
  E_EXIST = 4;    // File already exists
  E_IO    = 5;    // I/O Error
  E_INVAL = 6;    // Invalid arguments
  E_BUSY  = 7;    // File is being written to
}

// Represents an error message with a code and description
message StatusCode {
  bool success = 1;
  StatusEnum code = 2;
  string message = 3;
}


///Common node information shared by all the nodes in the cluster
message StorageInfoProto {
  uint32 layoutVersion = 1; // Layout version of the file system
  uint32 namespaceID = 2;    // File system namespace ID
  string clusterID = 3;     // ID of the cluster
  uint64 creationTime = 4;         // File system creation time
}

///Block access token information
message BlockKeyProto {
  uint32 keyId = 1;      // Key identifier
  uint64 expiryDate = 2; // Expiry time in milliseconds
  bytes keyBytes = 3;    // Key secret
}

///Current key and set of block keys at the namenode.
message ExportedBlockKeysProto {
  bool isBlockTokenEnabled = 1;
  uint64 keyUpdateInterval = 2;
  uint64 tokenLifeTime = 3;
  BlockKeyProto currentKey = 4;
  repeated BlockKeyProto allKeys = 5;
}

enum StorageTypeProto {
  DISK = 0;
  SSD = 1;
  ARCHIVE = 2;
  RAM_DISK = 3;
  PROVIDED = 4;
  NVDIMM = 5;
}

message DatanodeStorageProto {
  enum StorageState {
    NORMAL = 0;
    READ_ONLY_SHARED = 1;
  }

  string storageUuid = 1;
  StorageState state = 2;
  StorageTypeProto storageType = 3;
}

message StorageReportProto {
  DatanodeStorageProto storage = 1;
  bool failed = 2;
  uint64 capacity = 3;
  uint64 dfsUsed = 4;
  uint64 remaining = 5;
  uint64 blockPoolUsed = 6;
  uint64 nonDfsUsed = 7;
  string mount = 8;
}

message Block {
  string id = 1;
  uint64 len = 2;
  uint64 seq = 3;
}

message BlockWithLocations {
  Block block = 1;
  repeated string locations = 2;
}