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handle changes to placeholder state correctly

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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
2019-03-13 18:33:20 +01:00
parent 1eb0f12a61
commit d50e553ebb
6 changed files with 196 additions and 116 deletions
Download Patch File Download Diff File Expand all files Collapse all files

47
endpoint/endpoint.go
View File

@ -48,9 +48,10 @@ func (s *Sender) ListFilesystems(ctx context.Context, r *pdu.ListFilesystemReq)
rfss[i] = &pdu.Filesystem{ rfss[i] = &pdu.Filesystem{
Path: fss[i].ToString(), Path: fss[i].ToString(),
// FIXME: not supporting ResumeToken yet // FIXME: not supporting ResumeToken yet
IsPlaceholder: false, // sender FSs are never placeholders
} }
} }
res := &pdu.ListFilesystemRes{Filesystems: rfss, Empty: len(rfss) == 0} res := &pdu.ListFilesystemRes{Filesystems: rfss}
return res, nil return res, nil
} }
@ -118,7 +119,7 @@ func (p *Sender) PingDataconn(ctx context.Context, req *pdu.PingReq) (*pdu.PingR
return p.Ping(ctx, req) return p.Ping(ctx, req)
} }
func (p *Sender) WaitForConnectivity(ctx context.Context) (error) { func (p *Sender) WaitForConnectivity(ctx context.Context) error {
return nil return nil
} }
@ -243,7 +244,7 @@ func (s *Receiver) ListFilesystems(ctx context.Context, req *pdu.ListFilesystemR
if err != nil { if err != nil {
return nil, err return nil, err
} }
// present without prefix, and only those that are not placeholders // present filesystem without the root_fs prefix
fss := make([]*pdu.Filesystem, 0, len(filtered)) fss := make([]*pdu.Filesystem, 0, len(filtered))
for _, a := range filtered { for _, a := range filtered {
ph, err := zfs.ZFSIsPlaceholderFilesystem(a) ph, err := zfs.ZFSIsPlaceholderFilesystem(a)
@ -254,21 +255,16 @@ func (s *Receiver) ListFilesystems(ctx context.Context, req *pdu.ListFilesystemR
Error("inconsistent placeholder property") Error("inconsistent placeholder property")
return nil, errors.New("server error: inconsistent placeholder property") // don't leak path return nil, errors.New("server error: inconsistent placeholder property") // don't leak path
} }
if ph {
getLogger(ctx). getLogger(ctx).
WithField("fs", a.ToString()). WithField("fs", a.ToString()).
Debug("ignoring placeholder filesystem") WithField("is_placeholder", ph).
continue Debug("filesystem")
}
getLogger(ctx).
WithField("fs", a.ToString()).
Debug("non-placeholder filesystem")
a.TrimPrefix(root) a.TrimPrefix(root)
fss = append(fss, &pdu.Filesystem{Path: a.ToString()}) fss = append(fss, &pdu.Filesystem{Path: a.ToString(), IsPlaceholder: ph})
} }
if len(fss) == 0 { if len(fss) == 0 {
getLogger(ctx).Debug("no non-placeholder filesystems") getLogger(ctx).Debug("no filesystems found")
return &pdu.ListFilesystemRes{Empty: true}, nil return &pdu.ListFilesystemRes{}, nil
} }
return &pdu.ListFilesystemRes{Filesystems: fss}, nil return &pdu.ListFilesystemRes{Filesystems: fss}, nil
} }
@ -304,7 +300,7 @@ func (s *Receiver) PingDataconn(ctx context.Context, req *pdu.PingReq) (*pdu.Pin
return s.Ping(ctx, req) return s.Ping(ctx, req)
} }
func (s *Receiver) WaitForConnectivity(ctx context.Context) (error) { func (s *Receiver) WaitForConnectivity(ctx context.Context) error {
return nil return nil
} }
@ -316,7 +312,6 @@ func (s *Receiver) Send(ctx context.Context, req *pdu.SendReq) (*pdu.SendRes, zf
return nil, nil, fmt.Errorf("receiver does not implement Send()") return nil, nil, fmt.Errorf("receiver does not implement Send()")
} }
func (s *Receiver) Receive(ctx context.Context, req *pdu.ReceiveReq, receive zfs.StreamCopier) (*pdu.ReceiveRes, error) { func (s *Receiver) Receive(ctx context.Context, req *pdu.ReceiveReq, receive zfs.StreamCopier) (*pdu.ReceiveRes, error) {
getLogger(ctx).Debug("incoming Receive") getLogger(ctx).Debug("incoming Receive")
defer receive.Close() defer receive.Close()
@ -357,25 +352,27 @@ func (s *Receiver) Receive(ctx context.Context, req *pdu.ReceiveReq, receive zfs
return nil, err return nil, err
} }
needForceRecv := false var clearPlaceholderProperty bool
var recvOpts zfs.RecvOptions
props, err := zfs.ZFSGet(lp, []string{zfs.ZREPL_PLACEHOLDER_PROPERTY_NAME}) props, err := zfs.ZFSGet(lp, []string{zfs.ZREPL_PLACEHOLDER_PROPERTY_NAME})
if err == nil { if err == nil {
if isPlaceholder, _ := zfs.IsPlaceholder(lp, props.Get(zfs.ZREPL_PLACEHOLDER_PROPERTY_NAME)); isPlaceholder { if isPlaceholder, _ := zfs.IsPlaceholder(lp, props.Get(zfs.ZREPL_PLACEHOLDER_PROPERTY_NAME)); isPlaceholder {
needForceRecv = true recvOpts.RollbackAndForceRecv = true
clearPlaceholderProperty = true
}
}
if clearPlaceholderProperty {
if err := zfs.ZFSSetNoPlaceholder(lp); err != nil {
return nil, fmt.Errorf("cannot clear placeholder property for forced receive: %s", err)
} }
} }
args := make([]string, 0, 1) getLogger(ctx).WithField("opts", fmt.Sprintf("%#v", recvOpts)).Debug("start receive command")
if needForceRecv {
args = append(args, "-F")
}
getLogger(ctx).Debug("start receive command") if err := zfs.ZFSRecv(ctx, lp.ToString(), receive, recvOpts); err != nil {
if err := zfs.ZFSRecv(ctx, lp.ToString(), receive, args...); err != nil {
getLogger(ctx). getLogger(ctx).
WithError(err). WithError(err).
WithField("args", args). WithField("opts", recvOpts).
Error("zfs receive failed") Error("zfs receive failed")
return nil, err return nil, err
} }

163
replication/logic/pdu/pdu.pb.go
View File

@ -43,7 +43,7 @@ func (x FilesystemVersion_VersionType) String() string {
return proto.EnumName(FilesystemVersion_VersionType_name, int32(x)) return proto.EnumName(FilesystemVersion_VersionType_name, int32(x))
} }
func (FilesystemVersion_VersionType) EnumDescriptor() ([]byte, []int) { func (FilesystemVersion_VersionType) EnumDescriptor() ([]byte, []int) {
return fileDescriptor_pdu_759e477f62b58e58, []int{5, 0} return fileDescriptor_pdu_83b7e2a28d820622, []int{5, 0}
} }
type ListFilesystemReq struct { type ListFilesystemReq struct {
@ -56,7 +56,7 @@ func (m *ListFilesystemReq) Reset() { *m = ListFilesystemReq{} }
func (m *ListFilesystemReq) String() string { return proto.CompactTextString(m) } func (m *ListFilesystemReq) String() string { return proto.CompactTextString(m) }
func (*ListFilesystemReq) ProtoMessage() {} func (*ListFilesystemReq) ProtoMessage() {}
func (*ListFilesystemReq) Descriptor() ([]byte, []int) { func (*ListFilesystemReq) Descriptor() ([]byte, []int) {
return fileDescriptor_pdu_759e477f62b58e58, []int{0} return fileDescriptor_pdu_83b7e2a28d820622, []int{0}
} }
func (m *ListFilesystemReq) XXX_Unmarshal(b []byte) error { func (m *ListFilesystemReq) XXX_Unmarshal(b []byte) error {
return xxx_messageInfo_ListFilesystemReq.Unmarshal(m, b) return xxx_messageInfo_ListFilesystemReq.Unmarshal(m, b)
@ -78,7 +78,6 @@ var xxx_messageInfo_ListFilesystemReq proto.InternalMessageInfo
type ListFilesystemRes struct { type ListFilesystemRes struct {
Filesystems []*Filesystem `protobuf:"bytes,1,rep,name=Filesystems,proto3" json:"Filesystems,omitempty"` Filesystems []*Filesystem `protobuf:"bytes,1,rep,name=Filesystems,proto3" json:"Filesystems,omitempty"`
Empty bool `protobuf:"varint,2,opt,name=Empty,proto3" json:"Empty,omitempty"`
XXX_NoUnkeyedLiteral struct{} `json:"-"` XXX_NoUnkeyedLiteral struct{} `json:"-"`
XXX_unrecognized []byte `json:"-"` XXX_unrecognized []byte `json:"-"`
XXX_sizecache int32 `json:"-"` XXX_sizecache int32 `json:"-"`
@ -88,7 +87,7 @@ func (m *ListFilesystemRes) Reset() { *m = ListFilesystemRes{} }
func (m *ListFilesystemRes) String() string { return proto.CompactTextString(m) } func (m *ListFilesystemRes) String() string { return proto.CompactTextString(m) }
func (*ListFilesystemRes) ProtoMessage() {} func (*ListFilesystemRes) ProtoMessage() {}
func (*ListFilesystemRes) Descriptor() ([]byte, []int) { func (*ListFilesystemRes) Descriptor() ([]byte, []int) {
return fileDescriptor_pdu_759e477f62b58e58, []int{1} return fileDescriptor_pdu_83b7e2a28d820622, []int{1}
} }
func (m *ListFilesystemRes) XXX_Unmarshal(b []byte) error { func (m *ListFilesystemRes) XXX_Unmarshal(b []byte) error {
return xxx_messageInfo_ListFilesystemRes.Unmarshal(m, b) return xxx_messageInfo_ListFilesystemRes.Unmarshal(m, b)
@ -115,16 +114,10 @@ func (m *ListFilesystemRes) GetFilesystems() []*Filesystem {
return nil return nil
} }
func (m *ListFilesystemRes) GetEmpty() bool {
if m != nil {
return m.Empty
}
return false
}
type Filesystem struct { type Filesystem struct {
Path string `protobuf:"bytes,1,opt,name=Path,proto3" json:"Path,omitempty"` Path string `protobuf:"bytes,1,opt,name=Path,proto3" json:"Path,omitempty"`
ResumeToken string `protobuf:"bytes,2,opt,name=ResumeToken,proto3" json:"ResumeToken,omitempty"` ResumeToken string `protobuf:"bytes,2,opt,name=ResumeToken,proto3" json:"ResumeToken,omitempty"`
IsPlaceholder bool `protobuf:"varint,3,opt,name=IsPlaceholder,proto3" json:"IsPlaceholder,omitempty"`
XXX_NoUnkeyedLiteral struct{} `json:"-"` XXX_NoUnkeyedLiteral struct{} `json:"-"`
XXX_unrecognized []byte `json:"-"` XXX_unrecognized []byte `json:"-"`
XXX_sizecache int32 `json:"-"` XXX_sizecache int32 `json:"-"`
@ -134,7 +127,7 @@ func (m *Filesystem) Reset() { *m = Filesystem{} }
func (m *Filesystem) String() string { return proto.CompactTextString(m) } func (m *Filesystem) String() string { return proto.CompactTextString(m) }
func (*Filesystem) ProtoMessage() {} func (*Filesystem) ProtoMessage() {}
func (*Filesystem) Descriptor() ([]byte, []int) { func (*Filesystem) Descriptor() ([]byte, []int) {
return fileDescriptor_pdu_759e477f62b58e58, []int{2} return fileDescriptor_pdu_83b7e2a28d820622, []int{2}
} }
func (m *Filesystem) XXX_Unmarshal(b []byte) error { func (m *Filesystem) XXX_Unmarshal(b []byte) error {
return xxx_messageInfo_Filesystem.Unmarshal(m, b) return xxx_messageInfo_Filesystem.Unmarshal(m, b)
@ -168,6 +161,13 @@ func (m *Filesystem) GetResumeToken() string {
return "" return ""
} }
func (m *Filesystem) GetIsPlaceholder() bool {
if m != nil {
return m.IsPlaceholder
}
return false
}
type ListFilesystemVersionsReq struct { type ListFilesystemVersionsReq struct {
Filesystem string `protobuf:"bytes,1,opt,name=Filesystem,proto3" json:"Filesystem,omitempty"` Filesystem string `protobuf:"bytes,1,opt,name=Filesystem,proto3" json:"Filesystem,omitempty"`
XXX_NoUnkeyedLiteral struct{} `json:"-"` XXX_NoUnkeyedLiteral struct{} `json:"-"`
@ -179,7 +179,7 @@ func (m *ListFilesystemVersionsReq) Reset() { *m = ListFilesystemVersion
func (m *ListFilesystemVersionsReq) String() string { return proto.CompactTextString(m) } func (m *ListFilesystemVersionsReq) String() string { return proto.CompactTextString(m) }
func (*ListFilesystemVersionsReq) ProtoMessage() {} func (*ListFilesystemVersionsReq) ProtoMessage() {}
func (*ListFilesystemVersionsReq) Descriptor() ([]byte, []int) { func (*ListFilesystemVersionsReq) Descriptor() ([]byte, []int) {
return fileDescriptor_pdu_759e477f62b58e58, []int{3} return fileDescriptor_pdu_83b7e2a28d820622, []int{3}
} }
func (m *ListFilesystemVersionsReq) XXX_Unmarshal(b []byte) error { func (m *ListFilesystemVersionsReq) XXX_Unmarshal(b []byte) error {
return xxx_messageInfo_ListFilesystemVersionsReq.Unmarshal(m, b) return xxx_messageInfo_ListFilesystemVersionsReq.Unmarshal(m, b)
@ -217,7 +217,7 @@ func (m *ListFilesystemVersionsRes) Reset() { *m = ListFilesystemVersion
func (m *ListFilesystemVersionsRes) String() string { return proto.CompactTextString(m) } func (m *ListFilesystemVersionsRes) String() string { return proto.CompactTextString(m) }
func (*ListFilesystemVersionsRes) ProtoMessage() {} func (*ListFilesystemVersionsRes) ProtoMessage() {}
func (*ListFilesystemVersionsRes) Descriptor() ([]byte, []int) { func (*ListFilesystemVersionsRes) Descriptor() ([]byte, []int) {
return fileDescriptor_pdu_759e477f62b58e58, []int{4} return fileDescriptor_pdu_83b7e2a28d820622, []int{4}
} }
func (m *ListFilesystemVersionsRes) XXX_Unmarshal(b []byte) error { func (m *ListFilesystemVersionsRes) XXX_Unmarshal(b []byte) error {
return xxx_messageInfo_ListFilesystemVersionsRes.Unmarshal(m, b) return xxx_messageInfo_ListFilesystemVersionsRes.Unmarshal(m, b)
@ -259,7 +259,7 @@ func (m *FilesystemVersion) Reset() { *m = FilesystemVersion{} }
func (m *FilesystemVersion) String() string { return proto.CompactTextString(m) } func (m *FilesystemVersion) String() string { return proto.CompactTextString(m) }
func (*FilesystemVersion) ProtoMessage() {} func (*FilesystemVersion) ProtoMessage() {}
func (*FilesystemVersion) Descriptor() ([]byte, []int) { func (*FilesystemVersion) Descriptor() ([]byte, []int) {
return fileDescriptor_pdu_759e477f62b58e58, []int{5} return fileDescriptor_pdu_83b7e2a28d820622, []int{5}
} }
func (m *FilesystemVersion) XXX_Unmarshal(b []byte) error { func (m *FilesystemVersion) XXX_Unmarshal(b []byte) error {
return xxx_messageInfo_FilesystemVersion.Unmarshal(m, b) return xxx_messageInfo_FilesystemVersion.Unmarshal(m, b)
@ -339,7 +339,7 @@ func (m *SendReq) Reset() { *m = SendReq{} }
func (m *SendReq) String() string { return proto.CompactTextString(m) } func (m *SendReq) String() string { return proto.CompactTextString(m) }
func (*SendReq) ProtoMessage() {} func (*SendReq) ProtoMessage() {}
func (*SendReq) Descriptor() ([]byte, []int) { func (*SendReq) Descriptor() ([]byte, []int) {
return fileDescriptor_pdu_759e477f62b58e58, []int{6} return fileDescriptor_pdu_83b7e2a28d820622, []int{6}
} }
func (m *SendReq) XXX_Unmarshal(b []byte) error { func (m *SendReq) XXX_Unmarshal(b []byte) error {
return xxx_messageInfo_SendReq.Unmarshal(m, b) return xxx_messageInfo_SendReq.Unmarshal(m, b)
@ -420,7 +420,7 @@ func (m *Property) Reset() { *m = Property{} }
func (m *Property) String() string { return proto.CompactTextString(m) } func (m *Property) String() string { return proto.CompactTextString(m) }
func (*Property) ProtoMessage() {} func (*Property) ProtoMessage() {}
func (*Property) Descriptor() ([]byte, []int) { func (*Property) Descriptor() ([]byte, []int) {
return fileDescriptor_pdu_759e477f62b58e58, []int{7} return fileDescriptor_pdu_83b7e2a28d820622, []int{7}
} }
func (m *Property) XXX_Unmarshal(b []byte) error { func (m *Property) XXX_Unmarshal(b []byte) error {
return xxx_messageInfo_Property.Unmarshal(m, b) return xxx_messageInfo_Property.Unmarshal(m, b)
@ -470,7 +470,7 @@ func (m *SendRes) Reset() { *m = SendRes{} }
func (m *SendRes) String() string { return proto.CompactTextString(m) } func (m *SendRes) String() string { return proto.CompactTextString(m) }
func (*SendRes) ProtoMessage() {} func (*SendRes) ProtoMessage() {}
func (*SendRes) Descriptor() ([]byte, []int) { func (*SendRes) Descriptor() ([]byte, []int) {
return fileDescriptor_pdu_759e477f62b58e58, []int{8} return fileDescriptor_pdu_83b7e2a28d820622, []int{8}
} }
func (m *SendRes) XXX_Unmarshal(b []byte) error { func (m *SendRes) XXX_Unmarshal(b []byte) error {
return xxx_messageInfo_SendRes.Unmarshal(m, b) return xxx_messageInfo_SendRes.Unmarshal(m, b)
@ -524,7 +524,7 @@ func (m *ReceiveReq) Reset() { *m = ReceiveReq{} }
func (m *ReceiveReq) String() string { return proto.CompactTextString(m) } func (m *ReceiveReq) String() string { return proto.CompactTextString(m) }
func (*ReceiveReq) ProtoMessage() {} func (*ReceiveReq) ProtoMessage() {}
func (*ReceiveReq) Descriptor() ([]byte, []int) { func (*ReceiveReq) Descriptor() ([]byte, []int) {
return fileDescriptor_pdu_759e477f62b58e58, []int{9} return fileDescriptor_pdu_83b7e2a28d820622, []int{9}
} }
func (m *ReceiveReq) XXX_Unmarshal(b []byte) error { func (m *ReceiveReq) XXX_Unmarshal(b []byte) error {
return xxx_messageInfo_ReceiveReq.Unmarshal(m, b) return xxx_messageInfo_ReceiveReq.Unmarshal(m, b)
@ -568,7 +568,7 @@ func (m *ReceiveRes) Reset() { *m = ReceiveRes{} }
func (m *ReceiveRes) String() string { return proto.CompactTextString(m) } func (m *ReceiveRes) String() string { return proto.CompactTextString(m) }
func (*ReceiveRes) ProtoMessage() {} func (*ReceiveRes) ProtoMessage() {}
func (*ReceiveRes) Descriptor() ([]byte, []int) { func (*ReceiveRes) Descriptor() ([]byte, []int) {
return fileDescriptor_pdu_759e477f62b58e58, []int{10} return fileDescriptor_pdu_83b7e2a28d820622, []int{10}
} }
func (m *ReceiveRes) XXX_Unmarshal(b []byte) error { func (m *ReceiveRes) XXX_Unmarshal(b []byte) error {
return xxx_messageInfo_ReceiveRes.Unmarshal(m, b) return xxx_messageInfo_ReceiveRes.Unmarshal(m, b)
@ -601,7 +601,7 @@ func (m *DestroySnapshotsReq) Reset() { *m = DestroySnapshotsReq{} }
func (m *DestroySnapshotsReq) String() string { return proto.CompactTextString(m) } func (m *DestroySnapshotsReq) String() string { return proto.CompactTextString(m) }
func (*DestroySnapshotsReq) ProtoMessage() {} func (*DestroySnapshotsReq) ProtoMessage() {}
func (*DestroySnapshotsReq) Descriptor() ([]byte, []int) { func (*DestroySnapshotsReq) Descriptor() ([]byte, []int) {
return fileDescriptor_pdu_759e477f62b58e58, []int{11} return fileDescriptor_pdu_83b7e2a28d820622, []int{11}
} }
func (m *DestroySnapshotsReq) XXX_Unmarshal(b []byte) error { func (m *DestroySnapshotsReq) XXX_Unmarshal(b []byte) error {
return xxx_messageInfo_DestroySnapshotsReq.Unmarshal(m, b) return xxx_messageInfo_DestroySnapshotsReq.Unmarshal(m, b)
@ -647,7 +647,7 @@ func (m *DestroySnapshotRes) Reset() { *m = DestroySnapshotRes{} }
func (m *DestroySnapshotRes) String() string { return proto.CompactTextString(m) } func (m *DestroySnapshotRes) String() string { return proto.CompactTextString(m) }
func (*DestroySnapshotRes) ProtoMessage() {} func (*DestroySnapshotRes) ProtoMessage() {}
func (*DestroySnapshotRes) Descriptor() ([]byte, []int) { func (*DestroySnapshotRes) Descriptor() ([]byte, []int) {
return fileDescriptor_pdu_759e477f62b58e58, []int{12} return fileDescriptor_pdu_83b7e2a28d820622, []int{12}
} }
func (m *DestroySnapshotRes) XXX_Unmarshal(b []byte) error { func (m *DestroySnapshotRes) XXX_Unmarshal(b []byte) error {
return xxx_messageInfo_DestroySnapshotRes.Unmarshal(m, b) return xxx_messageInfo_DestroySnapshotRes.Unmarshal(m, b)
@ -692,7 +692,7 @@ func (m *DestroySnapshotsRes) Reset() { *m = DestroySnapshotsRes{} }
func (m *DestroySnapshotsRes) String() string { return proto.CompactTextString(m) } func (m *DestroySnapshotsRes) String() string { return proto.CompactTextString(m) }
func (*DestroySnapshotsRes) ProtoMessage() {} func (*DestroySnapshotsRes) ProtoMessage() {}
func (*DestroySnapshotsRes) Descriptor() ([]byte, []int) { func (*DestroySnapshotsRes) Descriptor() ([]byte, []int) {
return fileDescriptor_pdu_759e477f62b58e58, []int{13} return fileDescriptor_pdu_83b7e2a28d820622, []int{13}
} }
func (m *DestroySnapshotsRes) XXX_Unmarshal(b []byte) error { func (m *DestroySnapshotsRes) XXX_Unmarshal(b []byte) error {
return xxx_messageInfo_DestroySnapshotsRes.Unmarshal(m, b) return xxx_messageInfo_DestroySnapshotsRes.Unmarshal(m, b)
@ -734,7 +734,7 @@ func (m *ReplicationCursorReq) Reset() { *m = ReplicationCursorReq{} }
func (m *ReplicationCursorReq) String() string { return proto.CompactTextString(m) } func (m *ReplicationCursorReq) String() string { return proto.CompactTextString(m) }
func (*ReplicationCursorReq) ProtoMessage() {} func (*ReplicationCursorReq) ProtoMessage() {}
func (*ReplicationCursorReq) Descriptor() ([]byte, []int) { func (*ReplicationCursorReq) Descriptor() ([]byte, []int) {
return fileDescriptor_pdu_759e477f62b58e58, []int{14} return fileDescriptor_pdu_83b7e2a28d820622, []int{14}
} }
func (m *ReplicationCursorReq) XXX_Unmarshal(b []byte) error { func (m *ReplicationCursorReq) XXX_Unmarshal(b []byte) error {
return xxx_messageInfo_ReplicationCursorReq.Unmarshal(m, b) return xxx_messageInfo_ReplicationCursorReq.Unmarshal(m, b)
@ -882,7 +882,7 @@ func (m *ReplicationCursorReq_GetOp) Reset() { *m = ReplicationCursorReq
func (m *ReplicationCursorReq_GetOp) String() string { return proto.CompactTextString(m) } func (m *ReplicationCursorReq_GetOp) String() string { return proto.CompactTextString(m) }
func (*ReplicationCursorReq_GetOp) ProtoMessage() {} func (*ReplicationCursorReq_GetOp) ProtoMessage() {}
func (*ReplicationCursorReq_GetOp) Descriptor() ([]byte, []int) { func (*ReplicationCursorReq_GetOp) Descriptor() ([]byte, []int) {
return fileDescriptor_pdu_759e477f62b58e58, []int{14, 0} return fileDescriptor_pdu_83b7e2a28d820622, []int{14, 0}
} }
func (m *ReplicationCursorReq_GetOp) XXX_Unmarshal(b []byte) error { func (m *ReplicationCursorReq_GetOp) XXX_Unmarshal(b []byte) error {
return xxx_messageInfo_ReplicationCursorReq_GetOp.Unmarshal(m, b) return xxx_messageInfo_ReplicationCursorReq_GetOp.Unmarshal(m, b)
@ -913,7 +913,7 @@ func (m *ReplicationCursorReq_SetOp) Reset() { *m = ReplicationCursorReq
func (m *ReplicationCursorReq_SetOp) String() string { return proto.CompactTextString(m) } func (m *ReplicationCursorReq_SetOp) String() string { return proto.CompactTextString(m) }
func (*ReplicationCursorReq_SetOp) ProtoMessage() {} func (*ReplicationCursorReq_SetOp) ProtoMessage() {}
func (*ReplicationCursorReq_SetOp) Descriptor() ([]byte, []int) { func (*ReplicationCursorReq_SetOp) Descriptor() ([]byte, []int) {
return fileDescriptor_pdu_759e477f62b58e58, []int{14, 1} return fileDescriptor_pdu_83b7e2a28d820622, []int{14, 1}
} }
func (m *ReplicationCursorReq_SetOp) XXX_Unmarshal(b []byte) error { func (m *ReplicationCursorReq_SetOp) XXX_Unmarshal(b []byte) error {
return xxx_messageInfo_ReplicationCursorReq_SetOp.Unmarshal(m, b) return xxx_messageInfo_ReplicationCursorReq_SetOp.Unmarshal(m, b)
@ -954,7 +954,7 @@ func (m *ReplicationCursorRes) Reset() { *m = ReplicationCursorRes{} }
func (m *ReplicationCursorRes) String() string { return proto.CompactTextString(m) } func (m *ReplicationCursorRes) String() string { return proto.CompactTextString(m) }
func (*ReplicationCursorRes) ProtoMessage() {} func (*ReplicationCursorRes) ProtoMessage() {}
func (*ReplicationCursorRes) Descriptor() ([]byte, []int) { func (*ReplicationCursorRes) Descriptor() ([]byte, []int) {
return fileDescriptor_pdu_759e477f62b58e58, []int{15} return fileDescriptor_pdu_83b7e2a28d820622, []int{15}
} }
func (m *ReplicationCursorRes) XXX_Unmarshal(b []byte) error { func (m *ReplicationCursorRes) XXX_Unmarshal(b []byte) error {
return xxx_messageInfo_ReplicationCursorRes.Unmarshal(m, b) return xxx_messageInfo_ReplicationCursorRes.Unmarshal(m, b)
@ -1090,7 +1090,7 @@ func (m *PingReq) Reset() { *m = PingReq{} }
func (m *PingReq) String() string { return proto.CompactTextString(m) } func (m *PingReq) String() string { return proto.CompactTextString(m) }
func (*PingReq) ProtoMessage() {} func (*PingReq) ProtoMessage() {}
func (*PingReq) Descriptor() ([]byte, []int) { func (*PingReq) Descriptor() ([]byte, []int) {
return fileDescriptor_pdu_759e477f62b58e58, []int{16} return fileDescriptor_pdu_83b7e2a28d820622, []int{16}
} }
func (m *PingReq) XXX_Unmarshal(b []byte) error { func (m *PingReq) XXX_Unmarshal(b []byte) error {
return xxx_messageInfo_PingReq.Unmarshal(m, b) return xxx_messageInfo_PingReq.Unmarshal(m, b)
@ -1129,7 +1129,7 @@ func (m *PingRes) Reset() { *m = PingRes{} }
func (m *PingRes) String() string { return proto.CompactTextString(m) } func (m *PingRes) String() string { return proto.CompactTextString(m) }
func (*PingRes) ProtoMessage() {} func (*PingRes) ProtoMessage() {}
func (*PingRes) Descriptor() ([]byte, []int) { 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 { func (m *PingRes) XXX_Unmarshal(b []byte) error {
return xxx_messageInfo_PingRes.Unmarshal(m, b) return xxx_messageInfo_PingRes.Unmarshal(m, b)
@ -1384,57 +1384,58 @@ var _Replication_serviceDesc = grpc.ServiceDesc{
Metadata: "pdu.proto", 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{ var fileDescriptor_pdu_83b7e2a28d820622 = []byte{
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0x00,
} }

2
replication/logic/pdu/pdu.proto
View File

@ -14,12 +14,12 @@ message ListFilesystemReq {}
message ListFilesystemRes { message ListFilesystemRes {
repeated Filesystem Filesystems = 1; repeated Filesystem Filesystems = 1;
bool Empty = 2;
} }
message Filesystem { message Filesystem {
string Path = 1; string Path = 1;
string ResumeToken = 2; string ResumeToken = 2;
bool IsPlaceholder = 3;
} }
message ListFilesystemVersionsReq { message ListFilesystemVersionsReq {

12
replication/logic/replication_logic.go
View File

@ -108,7 +108,7 @@ type Filesystem struct {
receiver Receiver receiver Receiver
Path string // compat Path string // compat
receiverFSExists bool // compat receiverFS *pdu.Filesystem
promBytesReplicated prometheus.Counter // compat promBytesReplicated prometheus.Counter // compat
} }
@ -237,10 +237,10 @@ func (p *Planner) doPlanning(ctx context.Context) ([]*Filesystem, error) {
q := make([]*Filesystem, 0, len(sfss)) q := make([]*Filesystem, 0, len(sfss))
for _, fs := range sfss { for _, fs := range sfss {
receiverFSExists := false var receiverFS *pdu.Filesystem
for _, rfs := range rfss { for _, rfs := range rfss {
if rfs.Path == fs.Path { 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, sender: p.sender,
receiver: p.receiver, receiver: p.receiver,
Path: fs.Path, Path: fs.Path,
receiverFSExists: receiverFSExists, receiverFS: receiverFS,
promBytesReplicated: ctr, promBytesReplicated: ctr,
}) })
} }
@ -278,7 +278,7 @@ func (fs *Filesystem) doPlanning(ctx context.Context) ([]*Step, error) {
} }
var rfsvs []*pdu.FilesystemVersion 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}) rfsvsres, err := fs.receiver.ListFilesystemVersions(ctx, &pdu.ListFilesystemVersionsReq{Filesystem: fs.Path})
if err != nil { if err != nil {
log.WithError(err).Error("receiver error") 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") log.WithField("problem", msg).Error("cannot resolve conflict")
} }
} }
if path == nil { if len(path) == 0 {
return nil, conflict return nil, conflict
} }

6
zfs/placeholder.go
View File

@ -105,3 +105,9 @@ func ZFSCreatePlaceholderFilesystem(p *DatasetPath) (err error) {
return return
} }
func ZFSSetNoPlaceholder(p *DatasetPath) error {
props := NewZFSProperties()
props.Set(ZREPL_PLACEHOLDER_PROPERTY_NAME, "off")
return zfsSet(p.ToString(), props)
}

82
zfs/zfs.go
View File

@ -9,6 +9,7 @@ import (
"io" "io"
"os" "os"
"os/exec" "os/exec"
"sort"
"strings" "strings"
"sync" "sync"
"time" "time"
@ -691,17 +692,62 @@ type StreamCopier interface {
Close() error 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 { if err := validateZFSFilesystem(fs); err != nil {
return err 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 := make([]string, 0)
args = append(args, "recv") args = append(args, "recv")
if len(args) > 0 { if opts.RollbackAndForceRecv {
args = append(args, additionalArgs...) args = append(args, "-F")
} }
args = append(args, fs) args = append(args, fs)
@ -1038,3 +1084,33 @@ func ZFSBookmark(fs *DatasetPath, snapshot, bookmark string) (err error) {
return 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
}