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fix: improve conflict detection by tracking previous file hash (fixes #10349) (#10351)

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This adds a new field to the file information we keep, the "previous
blocks hash". This is the hash of the file contents as it was in its
previous incarnation. That is, every scan that updates the blocks hash
will move the current hash to the "previous" field.

This enables an addition to the conflict detection algorithm: if the
file to be synced is in conflict with the current file on disk
(version-counter wise), but it indicates that it was based on the
precise contents we have (new.prevBlocksHash == current.blocksHash),
then it's not really a conflict.

Signed-off-by: Jakob Borg <jakob@kastelo.net>
This commit is contained in:
Jakob Borg
2025-09-13 16:16:28 +02:00
committed by GitHub
parent 1b0eaa093a
commit d037681fd1
8 changed files with 447 additions and 421 deletions
Download Patch File Download Diff File Expand all files Collapse all files
internal/gen/dbproto/structs.pb.go
+127 -116
View File
@@ -28,20 +28,21 @@ type FileInfoTruncated struct {
sizeCache protoimpl.SizeCache
unknownFields protoimpl.UnknownFields
Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
Size int64 `protobuf:"varint,3,opt,name=size,proto3" json:"size,omitempty"`
ModifiedS int64 `protobuf:"varint,5,opt,name=modified_s,json=modifiedS,proto3" json:"modified_s,omitempty"`
ModifiedBy uint64 `protobuf:"varint,12,opt,name=modified_by,json=modifiedBy,proto3" json:"modified_by,omitempty"`
Version *bep.Vector `protobuf:"bytes,9,opt,name=version,proto3" json:"version,omitempty"`
Sequence int64 `protobuf:"varint,10,opt,name=sequence,proto3" json:"sequence,omitempty"`
SymlinkTarget []byte `protobuf:"bytes,17,opt,name=symlink_target,json=symlinkTarget,proto3" json:"symlink_target,omitempty"`
BlocksHash []byte `protobuf:"bytes,18,opt,name=blocks_hash,json=blocksHash,proto3" json:"blocks_hash,omitempty"`
Encrypted []byte `protobuf:"bytes,19,opt,name=encrypted,proto3" json:"encrypted,omitempty"`
Type bep.FileInfoType `protobuf:"varint,2,opt,name=type,proto3,enum=bep.FileInfoType" json:"type,omitempty"`
Permissions uint32 `protobuf:"varint,4,opt,name=permissions,proto3" json:"permissions,omitempty"`
ModifiedNs int32 `protobuf:"varint,11,opt,name=modified_ns,json=modifiedNs,proto3" json:"modified_ns,omitempty"`
BlockSize int32 `protobuf:"varint,13,opt,name=block_size,json=blockSize,proto3" json:"block_size,omitempty"`
Platform *bep.PlatformData `protobuf:"bytes,14,opt,name=platform,proto3" json:"platform,omitempty"`
Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
Size int64 `protobuf:"varint,3,opt,name=size,proto3" json:"size,omitempty"`
ModifiedS int64 `protobuf:"varint,5,opt,name=modified_s,json=modifiedS,proto3" json:"modified_s,omitempty"`
ModifiedBy uint64 `protobuf:"varint,12,opt,name=modified_by,json=modifiedBy,proto3" json:"modified_by,omitempty"`
Version *bep.Vector `protobuf:"bytes,9,opt,name=version,proto3" json:"version,omitempty"`
Sequence int64 `protobuf:"varint,10,opt,name=sequence,proto3" json:"sequence,omitempty"`
SymlinkTarget []byte `protobuf:"bytes,17,opt,name=symlink_target,json=symlinkTarget,proto3" json:"symlink_target,omitempty"`
BlocksHash []byte `protobuf:"bytes,18,opt,name=blocks_hash,json=blocksHash,proto3" json:"blocks_hash,omitempty"`
PreviousBlocksHash []byte `protobuf:"bytes,20,opt,name=previous_blocks_hash,json=previousBlocksHash,proto3" json:"previous_blocks_hash,omitempty"`
Encrypted []byte `protobuf:"bytes,19,opt,name=encrypted,proto3" json:"encrypted,omitempty"`
Type bep.FileInfoType `protobuf:"varint,2,opt,name=type,proto3,enum=bep.FileInfoType" json:"type,omitempty"`
Permissions uint32 `protobuf:"varint,4,opt,name=permissions,proto3" json:"permissions,omitempty"`
ModifiedNs int32 `protobuf:"varint,11,opt,name=modified_ns,json=modifiedNs,proto3" json:"modified_ns,omitempty"`
BlockSize int32 `protobuf:"varint,13,opt,name=block_size,json=blockSize,proto3" json:"block_size,omitempty"`
Platform *bep.PlatformData `protobuf:"bytes,14,opt,name=platform,proto3" json:"platform,omitempty"`
// The local_flags fields stores flags that are relevant to the local
// host only. It is not part of the protocol, doesn't get sent or
// received (we make sure to zero it), nonetheless we need it on our
@@ -147,6 +148,13 @@ func (x *FileInfoTruncated) GetBlocksHash() []byte {
return nil
}
func (x *FileInfoTruncated) GetPreviousBlocksHash() []byte {
if x != nil {
return x.PreviousBlocksHash
}
return nil
}
func (x *FileInfoTruncated) GetEncrypted() []byte {
if x != nil {
return x.Encrypted
@@ -747,7 +755,7 @@ var file_dbproto_structs_proto_rawDesc = []byte{
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