syntax = "proto3";

package pdu;

message ListFilesystemReq {}

message ListFilesystemRes {
    repeated Filesystem Filesystems = 1;
}

message Filesystem {
    string Path = 1;
    string ResumeToken = 2;
}

message ListFilesystemVersionsReq {
    string Filesystem = 1;
}

message ListFilesystemVersionsRes {
    repeated FilesystemVersion Versions = 1;
}

message FilesystemVersion {
    enum VersionType {
        Snapshot = 0;
        Bookmark = 1;
    }
    VersionType Type = 1;
    string Name = 2;
    uint64 Guid = 3;
    uint64 CreateTXG = 4;
    string Creation = 5; // RFC 3339
}


message SendReq {
    string Filesystem  = 1;
    string From = 2;
    // May be empty / null to request a full transfer of From
    string To = 3;

    // If ResumeToken is not empty, the resume token that CAN be tried for 'zfs send' by the sender.
    // The sender MUST indicate in SendRes.UsedResumeToken
    // If it does not work, the sender SHOULD clear the resume token on their side
    // and use From and To instead
    // If ResumeToken is not empty, the GUIDs of From and To
    // MUST correspond to those encoded in the ResumeToken.
    // Otherwise, the Sender MUST return an error.
    string ResumeToken  = 4;
    bool Compress = 5;
    bool Dedup = 6;

    bool DryRun = 7;
}

message Property {
    string Name = 1;
    string Value = 2;
}

message SendRes {
    // The actual stream is in the stream part of the streamrpc response

    // Whether the resume token provided in the request has been used or not.
    bool UsedResumeToken = 1;

    // Expected stream size determined by dry run, not exact.
    // 0 indicates that for the given SendReq, no size estimate could be made.
    int64 ExpectedSize = 2;

    repeated Property Properties = 3;
}

message ReceiveReq {
    // The stream part of the streamrpc request contains the zfs send stream

    string Filesystem = 1;

    // If true, the receiver should clear the resume token before perfoming the zfs recv of the stream in the request
    bool ClearResumeToken = 2;
}

message ReceiveRes {}

message DestroySnapshotsReq {
    string Filesystem = 1;
    // Path to filesystem, snapshot or bookmark to be destroyed
    repeated FilesystemVersion Snapshots = 2;
}

message DestroySnapshotRes {
    FilesystemVersion Snapshot = 1;
    string Error = 2;
}

message DestroySnapshotsRes {
    repeated DestroySnapshotRes Results = 1;
}

message SnapshotReplicationStatusReq {
    string Filesystem = 1;
    string Snapshot = 2;
    enum Op {
        Get = 0;
        SetReplicated = 1;
    }
    Op op = 3;
}

message SnapshotReplicationStatusRes {
    enum Status {
        Nonexistent = 0;
        NotReplicated = 1;
        Replicated = 2;
    }
    Status status = 1;
}