mirror of
https://github.com/zrepl/zrepl.git
synced 2024-11-22 00:13:52 +01:00
handle changes to placeholder state correctly
We assumed that `zfs recv -F FS` would basically replace FS inplace, leaving its children untouched. That is in fact not the case, it only works if `zfs send -R` is set, which we don't do. Thus, implement the required functionality manually. This solves a `zfs recv` error that would occur when a filesystem previously created as placeholder on the receiving side becomes a non-placeholder filesystem (likely due to config change on the sending side): zfs send pool1/foo@1 | zfs recv -F pool1/bar cannot receive new filesystem stream: destination has snapshots (eg. pool1/bar) must destroy them to overwrite it
This commit is contained in:
Christian Schwarz
parent
1eb0f12a61
commit
d50e553ebb
@ -48,9 +48,10 @@ func (s *Sender) ListFilesystems(ctx context.Context, r *pdu.ListFilesystemReq)
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rfss[i] = &pdu.Filesystem{
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Path: fss[i].ToString(),
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// FIXME: not supporting ResumeToken yet
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IsPlaceholder: false, // sender FSs are never placeholders
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}
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}
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res := &pdu.ListFilesystemRes{Filesystems: rfss, Empty: len(rfss) == 0}
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res := &pdu.ListFilesystemRes{Filesystems: rfss}
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return res, nil
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}
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@ -118,7 +119,7 @@ func (p *Sender) PingDataconn(ctx context.Context, req *pdu.PingReq) (*pdu.PingR
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return p.Ping(ctx, req)
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}
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func (p *Sender) WaitForConnectivity(ctx context.Context) (error) {
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func (p *Sender) WaitForConnectivity(ctx context.Context) error {
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return nil
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}
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@ -243,7 +244,7 @@ func (s *Receiver) ListFilesystems(ctx context.Context, req *pdu.ListFilesystemR
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if err != nil {
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return nil, err
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}
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// present without prefix, and only those that are not placeholders
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// present filesystem without the root_fs prefix
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fss := make([]*pdu.Filesystem, 0, len(filtered))
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for _, a := range filtered {
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ph, err := zfs.ZFSIsPlaceholderFilesystem(a)
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@ -254,21 +255,16 @@ func (s *Receiver) ListFilesystems(ctx context.Context, req *pdu.ListFilesystemR
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Error("inconsistent placeholder property")
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return nil, errors.New("server error: inconsistent placeholder property") // don't leak path
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}
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if ph {
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getLogger(ctx).
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WithField("fs", a.ToString()).
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Debug("ignoring placeholder filesystem")
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continue
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}
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getLogger(ctx).
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WithField("fs", a.ToString()).
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Debug("non-placeholder filesystem")
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WithField("is_placeholder", ph).
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Debug("filesystem")
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a.TrimPrefix(root)
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fss = append(fss, &pdu.Filesystem{Path: a.ToString()})
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fss = append(fss, &pdu.Filesystem{Path: a.ToString(), IsPlaceholder: ph})
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}
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if len(fss) == 0 {
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getLogger(ctx).Debug("no non-placeholder filesystems")
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return &pdu.ListFilesystemRes{Empty: true}, nil
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getLogger(ctx).Debug("no filesystems found")
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return &pdu.ListFilesystemRes{}, nil
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}
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return &pdu.ListFilesystemRes{Filesystems: fss}, nil
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}
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@ -304,7 +300,7 @@ func (s *Receiver) PingDataconn(ctx context.Context, req *pdu.PingReq) (*pdu.Pin
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return s.Ping(ctx, req)
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}
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func (s *Receiver) WaitForConnectivity(ctx context.Context) (error) {
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func (s *Receiver) WaitForConnectivity(ctx context.Context) error {
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return nil
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}
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@ -316,7 +312,6 @@ func (s *Receiver) Send(ctx context.Context, req *pdu.SendReq) (*pdu.SendRes, zf
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return nil, nil, fmt.Errorf("receiver does not implement Send()")
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}
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func (s *Receiver) Receive(ctx context.Context, req *pdu.ReceiveReq, receive zfs.StreamCopier) (*pdu.ReceiveRes, error) {
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getLogger(ctx).Debug("incoming Receive")
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defer receive.Close()
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@ -357,25 +352,27 @@ func (s *Receiver) Receive(ctx context.Context, req *pdu.ReceiveReq, receive zfs
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return nil, err
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}
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needForceRecv := false
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var clearPlaceholderProperty bool
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var recvOpts zfs.RecvOptions
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props, err := zfs.ZFSGet(lp, []string{zfs.ZREPL_PLACEHOLDER_PROPERTY_NAME})
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if err == nil {
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if isPlaceholder, _ := zfs.IsPlaceholder(lp, props.Get(zfs.ZREPL_PLACEHOLDER_PROPERTY_NAME)); isPlaceholder {
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needForceRecv = true
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recvOpts.RollbackAndForceRecv = true
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clearPlaceholderProperty = true
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}
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}
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if clearPlaceholderProperty {
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if err := zfs.ZFSSetNoPlaceholder(lp); err != nil {
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return nil, fmt.Errorf("cannot clear placeholder property for forced receive: %s", err)
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}
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}
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args := make([]string, 0, 1)
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if needForceRecv {
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args = append(args, "-F")
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}
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getLogger(ctx).WithField("opts", fmt.Sprintf("%#v", recvOpts)).Debug("start receive command")
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getLogger(ctx).Debug("start receive command")
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if err := zfs.ZFSRecv(ctx, lp.ToString(), receive, args...); err != nil {
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if err := zfs.ZFSRecv(ctx, lp.ToString(), receive, recvOpts); err != nil {
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getLogger(ctx).
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WithError(err).
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WithField("args", args).
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WithField("opts", recvOpts).
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Error("zfs receive failed")
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return nil, err
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}
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@ -43,7 +43,7 @@ func (x FilesystemVersion_VersionType) String() string {
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return proto.EnumName(FilesystemVersion_VersionType_name, int32(x))
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}
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func (FilesystemVersion_VersionType) EnumDescriptor() ([]byte, []int) {
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return fileDescriptor_pdu_759e477f62b58e58, []int{5, 0}
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return fileDescriptor_pdu_83b7e2a28d820622, []int{5, 0}
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}
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type ListFilesystemReq struct {
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@ -56,7 +56,7 @@ func (m *ListFilesystemReq) Reset() { *m = ListFilesystemReq{} }
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func (m *ListFilesystemReq) String() string { return proto.CompactTextString(m) }
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func (*ListFilesystemReq) ProtoMessage() {}
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func (*ListFilesystemReq) Descriptor() ([]byte, []int) {
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return fileDescriptor_pdu_759e477f62b58e58, []int{0}
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return fileDescriptor_pdu_83b7e2a28d820622, []int{0}
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}
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func (m *ListFilesystemReq) XXX_Unmarshal(b []byte) error {
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return xxx_messageInfo_ListFilesystemReq.Unmarshal(m, b)
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@ -78,7 +78,6 @@ var xxx_messageInfo_ListFilesystemReq proto.InternalMessageInfo
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type ListFilesystemRes struct {
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Filesystems []*Filesystem `protobuf:"bytes,1,rep,name=Filesystems,proto3" json:"Filesystems,omitempty"`
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Empty bool `protobuf:"varint,2,opt,name=Empty,proto3" json:"Empty,omitempty"`
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XXX_NoUnkeyedLiteral struct{} `json:"-"`
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XXX_unrecognized []byte `json:"-"`
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XXX_sizecache int32 `json:"-"`
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@ -88,7 +87,7 @@ func (m *ListFilesystemRes) Reset() { *m = ListFilesystemRes{} }
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func (m *ListFilesystemRes) String() string { return proto.CompactTextString(m) }
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func (*ListFilesystemRes) ProtoMessage() {}
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func (*ListFilesystemRes) Descriptor() ([]byte, []int) {
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return fileDescriptor_pdu_759e477f62b58e58, []int{1}
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return fileDescriptor_pdu_83b7e2a28d820622, []int{1}
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}
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func (m *ListFilesystemRes) XXX_Unmarshal(b []byte) error {
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return xxx_messageInfo_ListFilesystemRes.Unmarshal(m, b)
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@ -115,16 +114,10 @@ func (m *ListFilesystemRes) GetFilesystems() []*Filesystem {
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return nil
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}
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func (m *ListFilesystemRes) GetEmpty() bool {
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if m != nil {
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return m.Empty
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}
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return false
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}
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type Filesystem struct {
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Path string `protobuf:"bytes,1,opt,name=Path,proto3" json:"Path,omitempty"`
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ResumeToken string `protobuf:"bytes,2,opt,name=ResumeToken,proto3" json:"ResumeToken,omitempty"`
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IsPlaceholder bool `protobuf:"varint,3,opt,name=IsPlaceholder,proto3" json:"IsPlaceholder,omitempty"`
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XXX_NoUnkeyedLiteral struct{} `json:"-"`
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XXX_unrecognized []byte `json:"-"`
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XXX_sizecache int32 `json:"-"`
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@ -134,7 +127,7 @@ func (m *Filesystem) Reset() { *m = Filesystem{} }
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func (m *Filesystem) String() string { return proto.CompactTextString(m) }
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func (*Filesystem) ProtoMessage() {}
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func (*Filesystem) Descriptor() ([]byte, []int) {
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return fileDescriptor_pdu_759e477f62b58e58, []int{2}
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return fileDescriptor_pdu_83b7e2a28d820622, []int{2}
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}
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func (m *Filesystem) XXX_Unmarshal(b []byte) error {
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return xxx_messageInfo_Filesystem.Unmarshal(m, b)
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@ -168,6 +161,13 @@ func (m *Filesystem) GetResumeToken() string {
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return ""
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}
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func (m *Filesystem) GetIsPlaceholder() bool {
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if m != nil {
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return m.IsPlaceholder
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}
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return false
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}
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type ListFilesystemVersionsReq struct {
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Filesystem string `protobuf:"bytes,1,opt,name=Filesystem,proto3" json:"Filesystem,omitempty"`
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XXX_NoUnkeyedLiteral struct{} `json:"-"`
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@ -179,7 +179,7 @@ func (m *ListFilesystemVersionsReq) Reset() { *m = ListFilesystemVersion
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func (m *ListFilesystemVersionsReq) String() string { return proto.CompactTextString(m) }
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func (*ListFilesystemVersionsReq) ProtoMessage() {}
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func (*ListFilesystemVersionsReq) Descriptor() ([]byte, []int) {
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return fileDescriptor_pdu_759e477f62b58e58, []int{3}
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return fileDescriptor_pdu_83b7e2a28d820622, []int{3}
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}
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func (m *ListFilesystemVersionsReq) XXX_Unmarshal(b []byte) error {
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return xxx_messageInfo_ListFilesystemVersionsReq.Unmarshal(m, b)
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@ -217,7 +217,7 @@ func (m *ListFilesystemVersionsRes) Reset() { *m = ListFilesystemVersion
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func (m *ListFilesystemVersionsRes) String() string { return proto.CompactTextString(m) }
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func (*ListFilesystemVersionsRes) ProtoMessage() {}
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func (*ListFilesystemVersionsRes) Descriptor() ([]byte, []int) {
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return fileDescriptor_pdu_759e477f62b58e58, []int{4}
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return fileDescriptor_pdu_83b7e2a28d820622, []int{4}
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}
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func (m *ListFilesystemVersionsRes) XXX_Unmarshal(b []byte) error {
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return xxx_messageInfo_ListFilesystemVersionsRes.Unmarshal(m, b)
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@ -259,7 +259,7 @@ func (m *FilesystemVersion) Reset() { *m = FilesystemVersion{} }
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func (m *FilesystemVersion) String() string { return proto.CompactTextString(m) }
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func (*FilesystemVersion) ProtoMessage() {}
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func (*FilesystemVersion) Descriptor() ([]byte, []int) {
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return fileDescriptor_pdu_759e477f62b58e58, []int{5}
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return fileDescriptor_pdu_83b7e2a28d820622, []int{5}
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}
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func (m *FilesystemVersion) XXX_Unmarshal(b []byte) error {
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return xxx_messageInfo_FilesystemVersion.Unmarshal(m, b)
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@ -339,7 +339,7 @@ func (m *SendReq) Reset() { *m = SendReq{} }
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func (m *SendReq) String() string { return proto.CompactTextString(m) }
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func (*SendReq) ProtoMessage() {}
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func (*SendReq) Descriptor() ([]byte, []int) {
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return fileDescriptor_pdu_759e477f62b58e58, []int{6}
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return fileDescriptor_pdu_83b7e2a28d820622, []int{6}
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}
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func (m *SendReq) XXX_Unmarshal(b []byte) error {
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return xxx_messageInfo_SendReq.Unmarshal(m, b)
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@ -420,7 +420,7 @@ func (m *Property) Reset() { *m = Property{} }
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func (m *Property) String() string { return proto.CompactTextString(m) }
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func (*Property) ProtoMessage() {}
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func (*Property) Descriptor() ([]byte, []int) {
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return fileDescriptor_pdu_759e477f62b58e58, []int{7}
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return fileDescriptor_pdu_83b7e2a28d820622, []int{7}
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}
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func (m *Property) XXX_Unmarshal(b []byte) error {
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return xxx_messageInfo_Property.Unmarshal(m, b)
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@ -470,7 +470,7 @@ func (m *SendRes) Reset() { *m = SendRes{} }
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func (m *SendRes) String() string { return proto.CompactTextString(m) }
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func (*SendRes) ProtoMessage() {}
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func (*SendRes) Descriptor() ([]byte, []int) {
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return fileDescriptor_pdu_759e477f62b58e58, []int{8}
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return fileDescriptor_pdu_83b7e2a28d820622, []int{8}
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}
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func (m *SendRes) XXX_Unmarshal(b []byte) error {
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return xxx_messageInfo_SendRes.Unmarshal(m, b)
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@ -524,7 +524,7 @@ func (m *ReceiveReq) Reset() { *m = ReceiveReq{} }
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func (m *ReceiveReq) String() string { return proto.CompactTextString(m) }
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func (*ReceiveReq) ProtoMessage() {}
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func (*ReceiveReq) Descriptor() ([]byte, []int) {
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return fileDescriptor_pdu_759e477f62b58e58, []int{9}
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return fileDescriptor_pdu_83b7e2a28d820622, []int{9}
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}
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func (m *ReceiveReq) XXX_Unmarshal(b []byte) error {
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return xxx_messageInfo_ReceiveReq.Unmarshal(m, b)
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@ -568,7 +568,7 @@ func (m *ReceiveRes) Reset() { *m = ReceiveRes{} }
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func (m *ReceiveRes) String() string { return proto.CompactTextString(m) }
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func (*ReceiveRes) ProtoMessage() {}
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func (*ReceiveRes) Descriptor() ([]byte, []int) {
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return fileDescriptor_pdu_759e477f62b58e58, []int{10}
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return fileDescriptor_pdu_83b7e2a28d820622, []int{10}
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}
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func (m *ReceiveRes) XXX_Unmarshal(b []byte) error {
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return xxx_messageInfo_ReceiveRes.Unmarshal(m, b)
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@ -601,7 +601,7 @@ func (m *DestroySnapshotsReq) Reset() { *m = DestroySnapshotsReq{} }
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func (m *DestroySnapshotsReq) String() string { return proto.CompactTextString(m) }
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func (*DestroySnapshotsReq) ProtoMessage() {}
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func (*DestroySnapshotsReq) Descriptor() ([]byte, []int) {
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return fileDescriptor_pdu_759e477f62b58e58, []int{11}
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return fileDescriptor_pdu_83b7e2a28d820622, []int{11}
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}
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func (m *DestroySnapshotsReq) XXX_Unmarshal(b []byte) error {
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return xxx_messageInfo_DestroySnapshotsReq.Unmarshal(m, b)
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@ -647,7 +647,7 @@ func (m *DestroySnapshotRes) Reset() { *m = DestroySnapshotRes{} }
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func (m *DestroySnapshotRes) String() string { return proto.CompactTextString(m) }
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func (*DestroySnapshotRes) ProtoMessage() {}
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func (*DestroySnapshotRes) Descriptor() ([]byte, []int) {
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return fileDescriptor_pdu_759e477f62b58e58, []int{12}
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return fileDescriptor_pdu_83b7e2a28d820622, []int{12}
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}
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func (m *DestroySnapshotRes) XXX_Unmarshal(b []byte) error {
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return xxx_messageInfo_DestroySnapshotRes.Unmarshal(m, b)
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@ -692,7 +692,7 @@ func (m *DestroySnapshotsRes) Reset() { *m = DestroySnapshotsRes{} }
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func (m *DestroySnapshotsRes) String() string { return proto.CompactTextString(m) }
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func (*DestroySnapshotsRes) ProtoMessage() {}
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func (*DestroySnapshotsRes) Descriptor() ([]byte, []int) {
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return fileDescriptor_pdu_759e477f62b58e58, []int{13}
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return fileDescriptor_pdu_83b7e2a28d820622, []int{13}
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}
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func (m *DestroySnapshotsRes) XXX_Unmarshal(b []byte) error {
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return xxx_messageInfo_DestroySnapshotsRes.Unmarshal(m, b)
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@ -734,7 +734,7 @@ func (m *ReplicationCursorReq) Reset() { *m = ReplicationCursorReq{} }
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func (m *ReplicationCursorReq) String() string { return proto.CompactTextString(m) }
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func (*ReplicationCursorReq) ProtoMessage() {}
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func (*ReplicationCursorReq) Descriptor() ([]byte, []int) {
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return fileDescriptor_pdu_759e477f62b58e58, []int{14}
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return fileDescriptor_pdu_83b7e2a28d820622, []int{14}
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}
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func (m *ReplicationCursorReq) XXX_Unmarshal(b []byte) error {
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return xxx_messageInfo_ReplicationCursorReq.Unmarshal(m, b)
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@ -882,7 +882,7 @@ func (m *ReplicationCursorReq_GetOp) Reset() { *m = ReplicationCursorReq
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func (m *ReplicationCursorReq_GetOp) String() string { return proto.CompactTextString(m) }
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func (*ReplicationCursorReq_GetOp) ProtoMessage() {}
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func (*ReplicationCursorReq_GetOp) Descriptor() ([]byte, []int) {
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return fileDescriptor_pdu_759e477f62b58e58, []int{14, 0}
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return fileDescriptor_pdu_83b7e2a28d820622, []int{14, 0}
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}
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func (m *ReplicationCursorReq_GetOp) XXX_Unmarshal(b []byte) error {
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return xxx_messageInfo_ReplicationCursorReq_GetOp.Unmarshal(m, b)
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@ -913,7 +913,7 @@ func (m *ReplicationCursorReq_SetOp) Reset() { *m = ReplicationCursorReq
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func (m *ReplicationCursorReq_SetOp) String() string { return proto.CompactTextString(m) }
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func (*ReplicationCursorReq_SetOp) ProtoMessage() {}
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func (*ReplicationCursorReq_SetOp) Descriptor() ([]byte, []int) {
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return fileDescriptor_pdu_759e477f62b58e58, []int{14, 1}
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return fileDescriptor_pdu_83b7e2a28d820622, []int{14, 1}
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}
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func (m *ReplicationCursorReq_SetOp) XXX_Unmarshal(b []byte) error {
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return xxx_messageInfo_ReplicationCursorReq_SetOp.Unmarshal(m, b)
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@ -954,7 +954,7 @@ func (m *ReplicationCursorRes) Reset() { *m = ReplicationCursorRes{} }
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func (m *ReplicationCursorRes) String() string { return proto.CompactTextString(m) }
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func (*ReplicationCursorRes) ProtoMessage() {}
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func (*ReplicationCursorRes) Descriptor() ([]byte, []int) {
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return fileDescriptor_pdu_759e477f62b58e58, []int{15}
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return fileDescriptor_pdu_83b7e2a28d820622, []int{15}
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}
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func (m *ReplicationCursorRes) XXX_Unmarshal(b []byte) error {
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return xxx_messageInfo_ReplicationCursorRes.Unmarshal(m, b)
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@ -1090,7 +1090,7 @@ func (m *PingReq) Reset() { *m = PingReq{} }
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func (m *PingReq) String() string { return proto.CompactTextString(m) }
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func (*PingReq) ProtoMessage() {}
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func (*PingReq) Descriptor() ([]byte, []int) {
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return fileDescriptor_pdu_759e477f62b58e58, []int{16}
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return fileDescriptor_pdu_83b7e2a28d820622, []int{16}
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}
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func (m *PingReq) XXX_Unmarshal(b []byte) error {
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return xxx_messageInfo_PingReq.Unmarshal(m, b)
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@ -1129,7 +1129,7 @@ func (m *PingRes) Reset() { *m = PingRes{} }
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func (m *PingRes) String() string { return proto.CompactTextString(m) }
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func (*PingRes) ProtoMessage() {}
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||||
func (*PingRes) Descriptor() ([]byte, []int) {
|
||||
return fileDescriptor_pdu_759e477f62b58e58, []int{17}
|
||||
return fileDescriptor_pdu_83b7e2a28d820622, []int{17}
|
||||
}
|
||||
func (m *PingRes) XXX_Unmarshal(b []byte) error {
|
||||
return xxx_messageInfo_PingRes.Unmarshal(m, b)
|
||||
@ -1384,57 +1384,58 @@ var _Replication_serviceDesc = grpc.ServiceDesc{
|
||||
Metadata: "pdu.proto",
|
||||
}
|
||||
|
||||
func init() { proto.RegisterFile("pdu.proto", fileDescriptor_pdu_759e477f62b58e58) }
|
||||
func init() { proto.RegisterFile("pdu.proto", fileDescriptor_pdu_83b7e2a28d820622) }
|
||||
|
||||
var fileDescriptor_pdu_759e477f62b58e58 = []byte{
|
||||
// 779 bytes of a gzipped FileDescriptorProto
|
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var fileDescriptor_pdu_83b7e2a28d820622 = []byte{
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||||
// 785 bytes of a gzipped FileDescriptorProto
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|
||||
0x00,
|
||||
}
|
||||
|
||||
@ -14,12 +14,12 @@ message ListFilesystemReq {}
|
||||
|
||||
message ListFilesystemRes {
|
||||
repeated Filesystem Filesystems = 1;
|
||||
bool Empty = 2;
|
||||
}
|
||||
|
||||
message Filesystem {
|
||||
string Path = 1;
|
||||
string ResumeToken = 2;
|
||||
bool IsPlaceholder = 3;
|
||||
}
|
||||
|
||||
message ListFilesystemVersionsReq {
|
||||
|
||||
@ -108,7 +108,7 @@ type Filesystem struct {
|
||||
receiver Receiver
|
||||
|
||||
Path string // compat
|
||||
receiverFSExists bool // compat
|
||||
receiverFS *pdu.Filesystem
|
||||
promBytesReplicated prometheus.Counter // compat
|
||||
}
|
||||
|
||||
@ -237,10 +237,10 @@ func (p *Planner) doPlanning(ctx context.Context) ([]*Filesystem, error) {
|
||||
q := make([]*Filesystem, 0, len(sfss))
|
||||
for _, fs := range sfss {
|
||||
|
||||
receiverFSExists := false
|
||||
var receiverFS *pdu.Filesystem
|
||||
for _, rfs := range rfss {
|
||||
if rfs.Path == fs.Path {
|
||||
receiverFSExists = true
|
||||
receiverFS = rfs
|
||||
}
|
||||
}
|
||||
|
||||
@ -250,7 +250,7 @@ func (p *Planner) doPlanning(ctx context.Context) ([]*Filesystem, error) {
|
||||
sender: p.sender,
|
||||
receiver: p.receiver,
|
||||
Path: fs.Path,
|
||||
receiverFSExists: receiverFSExists,
|
||||
receiverFS: receiverFS,
|
||||
promBytesReplicated: ctr,
|
||||
})
|
||||
}
|
||||
@ -278,7 +278,7 @@ func (fs *Filesystem) doPlanning(ctx context.Context) ([]*Step, error) {
|
||||
}
|
||||
|
||||
var rfsvs []*pdu.FilesystemVersion
|
||||
if fs.receiverFSExists {
|
||||
if fs.receiverFS != nil && !fs.receiverFS.GetIsPlaceholder() {
|
||||
rfsvsres, err := fs.receiver.ListFilesystemVersions(ctx, &pdu.ListFilesystemVersionsReq{Filesystem: fs.Path})
|
||||
if err != nil {
|
||||
log.WithError(err).Error("receiver error")
|
||||
@ -301,7 +301,7 @@ func (fs *Filesystem) doPlanning(ctx context.Context) ([]*Step, error) {
|
||||
log.WithField("problem", msg).Error("cannot resolve conflict")
|
||||
}
|
||||
}
|
||||
if path == nil {
|
||||
if len(path) == 0 {
|
||||
return nil, conflict
|
||||
}
|
||||
|
||||
|
||||
@ -105,3 +105,9 @@ func ZFSCreatePlaceholderFilesystem(p *DatasetPath) (err error) {
|
||||
|
||||
return
|
||||
}
|
||||
|
||||
func ZFSSetNoPlaceholder(p *DatasetPath) error {
|
||||
props := NewZFSProperties()
|
||||
props.Set(ZREPL_PLACEHOLDER_PROPERTY_NAME, "off")
|
||||
return zfsSet(p.ToString(), props)
|
||||
}
|
||||
82
zfs/zfs.go
82
zfs/zfs.go
@ -9,6 +9,7 @@ import (
|
||||
"io"
|
||||
"os"
|
||||
"os/exec"
|
||||
"sort"
|
||||
"strings"
|
||||
"sync"
|
||||
"time"
|
||||
@ -691,17 +692,62 @@ type StreamCopier interface {
|
||||
Close() error
|
||||
}
|
||||
|
||||
type RecvOptions struct {
|
||||
// Rollback to the oldest snapshot, destroy it, then perform `recv -F`.
|
||||
// Note that this doesn't change property values, i.e. an existing local property value will be kept.
|
||||
RollbackAndForceRecv bool
|
||||
}
|
||||
|
||||
func ZFSRecv(ctx context.Context, fs string, streamCopier StreamCopier, additionalArgs ...string) (err error) {
|
||||
func ZFSRecv(ctx context.Context, fs string, streamCopier StreamCopier, opts RecvOptions) (err error) {
|
||||
|
||||
if err := validateZFSFilesystem(fs); err != nil {
|
||||
return err
|
||||
}
|
||||
fsdp, err := NewDatasetPath(fs)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
if opts.RollbackAndForceRecv {
|
||||
// destroy all snapshots before `recv -F` because `recv -F`
|
||||
// does not perform a rollback unless `send -R` was used (which we assume hasn't been the case)
|
||||
var snaps []FilesystemVersion
|
||||
{
|
||||
vs, err := ZFSListFilesystemVersions(fsdp, nil)
|
||||
if err != nil {
|
||||
err = fmt.Errorf("cannot list versions to rollback is required: %s", err)
|
||||
}
|
||||
for _, v := range vs {
|
||||
if v.Type == Snapshot {
|
||||
snaps = append(snaps, v)
|
||||
}
|
||||
}
|
||||
sort.Slice(snaps, func(i, j int) bool {
|
||||
return snaps[i].CreateTXG < snaps[j].CreateTXG
|
||||
})
|
||||
}
|
||||
// bookmarks are rolled back automatically
|
||||
if len(snaps) > 0 {
|
||||
// use rollback to efficiently destroy all but the earliest snapshot
|
||||
// then destroy that earliest snapshot
|
||||
// afterwards, `recv -F` will work
|
||||
rollbackTarget := snaps[0]
|
||||
rollbackTargetAbs := rollbackTarget.ToAbsPath(fsdp)
|
||||
debug("recv: rollback to %q", rollbackTargetAbs)
|
||||
if err := ZFSRollback(fsdp, rollbackTarget, "-r"); err != nil {
|
||||
return fmt.Errorf("cannot rollback %s to %s for forced receive: %s", fsdp.ToString(), rollbackTarget, err)
|
||||
}
|
||||
debug("recv: destroy %q", rollbackTargetAbs)
|
||||
if err := ZFSDestroy(rollbackTargetAbs); err != nil {
|
||||
return fmt.Errorf("cannot destroy %s for forced receive: %s", rollbackTargetAbs, err)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
args := make([]string, 0)
|
||||
args = append(args, "recv")
|
||||
if len(args) > 0 {
|
||||
args = append(args, additionalArgs...)
|
||||
if opts.RollbackAndForceRecv {
|
||||
args = append(args, "-F")
|
||||
}
|
||||
args = append(args, fs)
|
||||
|
||||
@ -1038,3 +1084,33 @@ func ZFSBookmark(fs *DatasetPath, snapshot, bookmark string) (err error) {
|
||||
return
|
||||
|
||||
}
|
||||
|
||||
func ZFSRollback(fs *DatasetPath, snapshot FilesystemVersion, rollbackArgs ...string) (err error) {
|
||||
|
||||
snapabs := snapshot.ToAbsPath(fs)
|
||||
if snapshot.Type != Snapshot {
|
||||
return fmt.Errorf("can only rollback to snapshots, got %s", snapabs)
|
||||
}
|
||||
|
||||
args := []string{"rollback"}
|
||||
args = append(args, rollbackArgs...)
|
||||
args = append(args, snapabs)
|
||||
|
||||
cmd := exec.Command(ZFS_BINARY, args...)
|
||||
|
||||
stderr := bytes.NewBuffer(make([]byte, 0, 1024))
|
||||
cmd.Stderr = stderr
|
||||
|
||||
if err = cmd.Start(); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
if err = cmd.Wait(); err != nil {
|
||||
err = &ZFSError{
|
||||
Stderr: stderr.Bytes(),
|
||||
WaitErr: err,
|
||||
}
|
||||
}
|
||||
|
||||
return err
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user