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lib/model, lib/protocol, lib/scanner: Include symlink target in index, pull symlinks synchronously

Browse Source 
GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/3792
This commit is contained in:
Jakob Borg 2016-12-09 18:02:18 +00:00 committed by Audrius Butkevicius
parent f6a2b6252a
commit 7b07ed6580
12 changed files with 393 additions and 285 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

99
lib/db/structs.pb.go
View File

@ -63,6 +63,7 @@ type FileInfoTruncated struct {
NoPermissions bool `protobuf:"varint,8,opt,name=no_permissions,json=noPermissions,proto3" json:"no_permissions,omitempty"`
Version protocol.Vector `protobuf:"bytes,9,opt,name=version" json:"version"`
Sequence int64 `protobuf:"varint,10,opt,name=sequence,proto3" json:"sequence,omitempty"`
SymlinkTarget string `protobuf:"bytes,17,opt,name=symlink_target,json=symlinkTarget,proto3" json:"symlink_target,omitempty"`
}
func (m *FileInfoTruncated) Reset() { *m = FileInfoTruncated{} }
@ -225,6 +226,14 @@ func (m *FileInfoTruncated) MarshalTo(data []byte) (int, error) {
i++
i = encodeVarintStructs(data, i, uint64(m.ModifiedNs))
}
if len(m.SymlinkTarget) > 0 {
data[i] = 0x8a
i++
data[i] = 0x1
i++
i = encodeVarintStructs(data, i, uint64(len(m.SymlinkTarget)))
i += copy(data[i:], m.SymlinkTarget)
}
return i, nil
}
@ -315,6 +324,10 @@ func (m *FileInfoTruncated) ProtoSize() (n int) {
if m.ModifiedNs != 0 {
n += 1 + sovStructs(uint64(m.ModifiedNs))
}
l = len(m.SymlinkTarget)
if l > 0 {
n += 2 + l + sovStructs(uint64(l))
}
return n
}
@ -785,6 +798,35 @@ func (m *FileInfoTruncated) Unmarshal(data []byte) error {
break
}
}
case 17:
if wireType != 2 {
return fmt.Errorf("proto: wrong wireType = %d for field SymlinkTarget", wireType)
}
var stringLen uint64
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowStructs
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := data[iNdEx]
iNdEx++
stringLen |= (uint64(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
intStringLen := int(stringLen)
if intStringLen < 0 {
return ErrInvalidLengthStructs
}
postIndex := iNdEx + intStringLen
if postIndex > l {
return io.ErrUnexpectedEOF
}
m.SymlinkTarget = string(data[iNdEx:postIndex])
iNdEx = postIndex
default:
iNdEx = preIndex
skippy, err := skipStructs(data[iNdEx:])
@ -912,32 +954,33 @@ var (
)
var fileDescriptorStructs = []byte{
// 425 bytes of a gzipped FileDescriptorProto
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0xff, 0x2a, 0xae, 0x24, 0x77, 0xb3, 0x02, 0x00, 0x00,
// 442 bytes of a gzipped FileDescriptorProto
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0xff, 0xff, 0xb1, 0x2f, 0x12, 0xb6, 0xda, 0x02, 0x00, 0x00,
}

1
lib/db/structs.proto
View File

@ -33,4 +33,5 @@ message FileInfoTruncated {
bool no_permissions = 8;
protocol.Vector version = 9 [(gogoproto.nullable) = false];
int64 sequence = 10;
string symlink_target = 17;
}

33
lib/discover/local.pb.go
View File

@ -382,21 +382,20 @@ var (
)
var fileDescriptorLocal = []byte{
// 241 bytes of a gzipped FileDescriptorProto
0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0x4c, 0x8e, 0x4f, 0x4e, 0x84, 0x30,
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0x00,
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}

201
lib/model/rwfolder.go
View File

@ -9,7 +9,6 @@ package model
import (
"errors"
"fmt"
"io/ioutil"
"math/rand"
"os"
"path/filepath"
@ -63,6 +62,7 @@ const (
dbUpdateHandleFile
dbUpdateDeleteFile
dbUpdateShortcutFile
dbUpdateHandleSymlink
)
const (
@ -394,7 +394,7 @@ func (f *rwFolder) pullerIteration(ignores *ignore.Matcher) int {
dirDeletions := []protocol.FileInfo{}
buckets := map[string][]protocol.FileInfo{}
handleFile := func(fi protocol.FileInfo) bool {
handleItem := func(fi protocol.FileInfo) bool {
switch {
case fi.IsDeleted():
// A deleted file, directory or symlink
@ -413,10 +413,18 @@ func (f *rwFolder) pullerIteration(ignores *ignore.Matcher) int {
buckets[key] = append(buckets[key], df)
}
}
changed++
case fi.IsDirectory() && !fi.IsSymlink():
// A new or changed directory
l.Debugln("Creating directory", fi.Name)
l.Debugln("Handling directory", fi.Name)
f.handleDir(fi)
changed++
case fi.IsSymlink():
l.Debugln("Handling symlink", fi.Name)
f.handleSymlink(fi)
changed++
default:
return false
}
@ -442,7 +450,7 @@ func (f *rwFolder) pullerIteration(ignores *ignore.Matcher) int {
file := intf.(protocol.FileInfo)
l.Debugln(f, "handling", file.Name)
if !handleFile(file) {
if !handleItem(file) {
// A new or changed file or symlink. This is the only case where
// we do stuff concurrently in the background. We only queue
// files where we are connected to at least one device that has
@ -504,35 +512,35 @@ nextFile:
// Handles races where an index update arrives changing what the file
// is between queueing and retrieving it from the queue, effectively
// changing how the file should be handled.
if handleFile(fi) {
if handleItem(fi) {
continue
}
if !fi.IsSymlink() {
key := string(fi.Blocks[0].Hash)
for i, candidate := range buckets[key] {
if scanner.BlocksEqual(candidate.Blocks, fi.Blocks) {
// Remove the candidate from the bucket
lidx := len(buckets[key]) - 1
buckets[key][i] = buckets[key][lidx]
buckets[key] = buckets[key][:lidx]
// Check our list of files to be removed for a match, in which case
// we can just do a rename instead.
key := string(fi.Blocks[0].Hash)
for i, candidate := range buckets[key] {
if scanner.BlocksEqual(candidate.Blocks, fi.Blocks) {
// Remove the candidate from the bucket
lidx := len(buckets[key]) - 1
buckets[key][i] = buckets[key][lidx]
buckets[key] = buckets[key][:lidx]
// candidate is our current state of the file, where as the
// desired state with the delete bit set is in the deletion
// map.
desired := fileDeletions[candidate.Name]
// Remove the pending deletion (as we perform it by renaming)
delete(fileDeletions, candidate.Name)
// candidate is our current state of the file, where as the
// desired state with the delete bit set is in the deletion
// map.
desired := fileDeletions[candidate.Name]
// Remove the pending deletion (as we perform it by renaming)
delete(fileDeletions, candidate.Name)
f.renameFile(desired, fi)
f.renameFile(desired, fi)
f.queue.Done(fileName)
continue nextFile
}
f.queue.Done(fileName)
continue nextFile
}
}
// Not a rename or a symlink, deal with it.
// Handle the file normally, by coping and pulling, etc.
f.handleFile(fi, copyChan, finisherChan)
}
@ -569,7 +577,10 @@ nextFile:
// handleDir creates or updates the given directory
func (f *rwFolder) handleDir(file protocol.FileInfo) {
// Used in the defer closure below, updated by the function body. Take
// care not declare another err.
var err error
events.Default.Log(events.ItemStarted, map[string]string{
"folder": f.folderID,
"item": file.Name,
@ -666,15 +677,93 @@ func (f *rwFolder) handleDir(file protocol.FileInfo) {
}
}
// handleSymlink creates or updates the given symlink
func (f *rwFolder) handleSymlink(file protocol.FileInfo) {
// Used in the defer closure below, updated by the function body. Take
// care not declare another err.
var err error
events.Default.Log(events.ItemStarted, map[string]string{
"folder": f.folderID,
"item": file.Name,
"type": "symlink",
"action": "update",
})
defer func() {
events.Default.Log(events.ItemFinished, map[string]interface{}{
"folder": f.folderID,
"item": file.Name,
"error": events.Error(err),
"type": "symlink",
"action": "update",
})
}()
realName, err := rootedJoinedPath(f.dir, file.Name)
if err != nil {
f.newError(file.Name, err)
return
}
if shouldDebug() {
curFile, _ := f.model.CurrentFolderFile(f.folderID, file.Name)
l.Debugf("need symlink\n\t%v\n\t%v", file, curFile)
}
if len(file.SymlinkTarget) == 0 {
// Index entry from a Syncthing predating the support for including
// the link target in the index entry. We log this as an error.
err = errors.New("incompatible symlink entry; rescan with newer Syncthing on source")
l.Infof("Puller (folder %q, dir %q): %v", f.folderID, file.Name, err)
f.newError(file.Name, err)
return
}
if _, err = f.mtimeFS.Lstat(realName); err == nil {
// There is already something under that name. Remove it to replace
// with the symlink. This also handles the "change symlink type"
// path.
err = osutil.InWritableDir(os.Remove, realName)
if err != nil {
l.Infof("Puller (folder %q, dir %q): %v", f.folderID, file.Name, err)
f.newError(file.Name, err)
return
}
}
tt := symlinks.TargetFile
if file.IsDirectory() {
tt = symlinks.TargetDirectory
}
// We declare a function that acts on only the path name, so
// we can pass it to InWritableDir.
createLink := func(path string) error {
return symlinks.Create(path, file.SymlinkTarget, tt)
}
if err = osutil.InWritableDir(createLink, realName); err == nil {
f.dbUpdates <- dbUpdateJob{file, dbUpdateHandleSymlink}
} else {
l.Infof("Puller (folder %q, dir %q): %v", f.folderID, file.Name, err)
f.newError(file.Name, err)
}
}
// deleteDir attempts to delete the given directory
func (f *rwFolder) deleteDir(file protocol.FileInfo, matcher *ignore.Matcher) {
// Used in the defer closure below, updated by the function body. Take
// care not declare another err.
var err error
events.Default.Log(events.ItemStarted, map[string]string{
"folder": f.folderID,
"item": file.Name,
"type": "dir",
"action": "delete",
})
defer func() {
events.Default.Log(events.ItemFinished, map[string]interface{}{
"folder": f.folderID,
@ -721,13 +810,17 @@ func (f *rwFolder) deleteDir(file protocol.FileInfo, matcher *ignore.Matcher) {
// deleteFile attempts to delete the given file
func (f *rwFolder) deleteFile(file protocol.FileInfo) {
// Used in the defer closure below, updated by the function body. Take
// care not declare another err.
var err error
events.Default.Log(events.ItemStarted, map[string]string{
"folder": f.folderID,
"item": file.Name,
"type": "file",
"action": "delete",
})
defer func() {
events.Default.Log(events.ItemFinished, map[string]interface{}{
"folder": f.folderID,
@ -775,7 +868,10 @@ func (f *rwFolder) deleteFile(file protocol.FileInfo) {
// renameFile attempts to rename an existing file to a destination
// and set the right attributes on it.
func (f *rwFolder) renameFile(source, target protocol.FileInfo) {
// Used in the defer closure below, updated by the function body. Take
// care not declare another err.
var err error
events.Default.Log(events.ItemStarted, map[string]string{
"folder": f.folderID,
"item": source.Name,
@ -788,6 +884,7 @@ func (f *rwFolder) renameFile(source, target protocol.FileInfo) {
"type": "file",
"action": "update",
})
defer func() {
events.Default.Log(events.ItemFinished, map[string]interface{}{
"folder": f.folderID,
@ -912,13 +1009,7 @@ func (f *rwFolder) handleFile(file protocol.FileInfo, copyChan chan<- copyBlocks
f.queue.Done(file.Name)
var err error
if file.IsSymlink() {
err = f.shortcutSymlink(file)
} else {
err = f.shortcutFile(file)
}
err := f.shortcutFile(file)
events.Default.Log(events.ItemFinished, map[string]interface{}{
"folder": f.folderID,
"item": file.Name,
@ -1089,20 +1180,6 @@ func (f *rwFolder) shortcutFile(file protocol.FileInfo) error {
return nil
}
// shortcutSymlink changes the symlinks type if necessary.
func (f *rwFolder) shortcutSymlink(file protocol.FileInfo) (err error) {
tt := symlinks.TargetFile
if file.IsDirectory() {
tt = symlinks.TargetDirectory
}
err = symlinks.ChangeType(filepath.Join(f.dir, file.Name), tt)
if err != nil {
l.Infof("Puller (folder %q, file %q): symlink shortcut: %v", f.folderID, file.Name, err)
f.newError(file.Name, err)
}
return
}
// copierRoutine reads copierStates until the in channel closes and performs
// the relevant copies when possible, or passes it to the puller routine.
func (f *rwFolder) copierRoutine(in <-chan copyBlocksState, pullChan chan<- pullBlockState, out chan<- *sharedPullerState) {
@ -1332,27 +1409,6 @@ func (f *rwFolder) performFinish(state *sharedPullerState) error {
// Set the correct timestamp on the new file
f.mtimeFS.Chtimes(state.realName, state.file.ModTime(), state.file.ModTime()) // never fails
// If it's a symlink, the target of the symlink is inside the file.
if state.file.IsSymlink() {
content, err := ioutil.ReadFile(state.realName)
if err != nil {
return err
}
// Remove the file, and replace it with a symlink.
err = osutil.InWritableDir(func(path string) error {
os.Remove(path)
tt := symlinks.TargetFile
if state.file.IsDirectory() {
tt = symlinks.TargetDirectory
}
return symlinks.Create(path, string(content), tt)
}, state.realName)
if err != nil {
return err
}
}
// Record the updated file in the index
f.dbUpdates <- dbUpdateJob{state.file, dbUpdateHandleFile}
return nil
@ -1441,17 +1497,14 @@ func (f *rwFolder) dbUpdaterRoutine() {
// collect changed files and dirs
switch job.jobType {
case dbUpdateHandleFile, dbUpdateShortcutFile:
// fsyncing symlinks is only supported by MacOS
if !job.file.IsSymlink() {
changedFiles = append(changedFiles,
filepath.Join(f.dir, job.file.Name))
}
changedFiles = append(changedFiles, filepath.Join(f.dir, job.file.Name))
case dbUpdateHandleDir:
changedDirs = append(changedDirs, filepath.Join(f.dir, job.file.Name))
case dbUpdateHandleSymlink:
// fsyncing symlinks is only supported by MacOS, ignore
}
if job.jobType != dbUpdateShortcutFile {
changedDirs = append(changedDirs,
filepath.Dir(filepath.Join(f.dir, job.file.Name)))
changedDirs = append(changedDirs, filepath.Dir(filepath.Join(f.dir, job.file.Name)))
}
}
if job.file.IsInvalid() || (job.file.IsDirectory() && !job.file.IsSymlink()) {

254
lib/protocol/bep.pb.go
View File

@ -303,7 +303,8 @@ type FileInfo struct {
NoPermissions bool `protobuf:"varint,8,opt,name=no_permissions,json=noPermissions,proto3" json:"no_permissions,omitempty"`
Version Vector `protobuf:"bytes,9,opt,name=version" json:"version"`
Sequence int64 `protobuf:"varint,10,opt,name=sequence,proto3" json:"sequence,omitempty"`
Blocks []BlockInfo `protobuf:"bytes,16,rep,name=Blocks,json=blocks" json:"Blocks"`
Blocks []BlockInfo `protobuf:"bytes,16,rep,name=Blocks" json:"Blocks"`
SymlinkTarget string `protobuf:"bytes,17,opt,name=symlink_target,json=symlinkTarget,proto3" json:"symlink_target,omitempty"`
}
func (m *FileInfo) Reset() { *m = FileInfo{} }
@ -870,6 +871,14 @@ func (m *FileInfo) MarshalTo(data []byte) (int, error) {
i += n
}
}
if len(m.SymlinkTarget) > 0 {
data[i] = 0x8a
i++
data[i] = 0x1
i++
i = encodeVarintBep(data, i, uint64(len(m.SymlinkTarget)))
i += copy(data[i:], m.SymlinkTarget)
}
return i, nil
}
@ -1394,6 +1403,10 @@ func (m *FileInfo) ProtoSize() (n int) {
n += 2 + l + sovBep(uint64(l))
}
}
l = len(m.SymlinkTarget)
if l > 0 {
n += 2 + l + sovBep(uint64(l))
}
return n
}
@ -2850,6 +2863,35 @@ func (m *FileInfo) Unmarshal(data []byte) error {
return err
}
iNdEx = postIndex
case 17:
if wireType != 2 {
return fmt.Errorf("proto: wrong wireType = %d for field SymlinkTarget", wireType)
}
var stringLen uint64
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowBep
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := data[iNdEx]
iNdEx++
stringLen |= (uint64(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
intStringLen := int(stringLen)
if intStringLen < 0 {
return ErrInvalidLengthBep
}
postIndex := iNdEx + intStringLen
if postIndex > l {
return io.ErrUnexpectedEOF
}
m.SymlinkTarget = string(data[iNdEx:postIndex])
iNdEx = postIndex
default:
iNdEx = preIndex
skippy, err := skipBep(data[iNdEx:])
@ -3987,110 +4029,108 @@ var (
)
var fileDescriptorBep = []byte{
// 1665 bytes of a gzipped FileDescriptorProto
0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0xac, 0x56, 0x4f, 0x73, 0xdb, 0xc6,
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0xf8, 0xaf, 0x23, 0x74, 0xea, 0x11, 0xac, 0xa0, 0x5c, 0xe7, 0x37, 0x3f, 0x01, 0x32, 0xbf, 0x03,
0xa0, 0xbb, 0xd7, 0x41, 0xa0, 0x6c, 0x50, 0x54, 0x49, 0x1b, 0x56, 0x50, 0xe9, 0x54, 0x1d, 0x34,
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0xae, 0x9e, 0xa9, 0x06, 0x18, 0xde, 0x04, 0xc0, 0x7a, 0x0c, 0xd0, 0x09, 0xd4, 0x15, 0x3c, 0x38,
0x0a, 0xcd, 0xce, 0x8b, 0xe6, 0xcb, 0x3e, 0x24, 0x07, 0x83, 0x7a, 0x23, 0x56, 0x37, 0xdd, 0xd7,
0xd6, 0x65, 0xd0, 0xf8, 0x6f, 0x06, 0x55, 0xd3, 0xb7, 0x23, 0x6c, 0x90, 0x8e, 0xb5, 0x8e, 0x1a,
0xbb, 0x4b, 0xeb, 0xd8, 0x37, 0x3e, 0x40, 0xe5, 0xb6, 0x66, 0xa8, 0xad, 0x41, 0xd7, 0x78, 0x19,
0xc7, 0x92, 0x06, 0xb5, 0x1d, 0x9f, 0x17, 0x37, 0x7b, 0x81, 0x56, 0xfb, 0x2f, 0x4f, 0x3b, 0x9a,
0xfe, 0xcc, 0xe4, 0x16, 0xb3, 0xf2, 0x3d, 0x00, 0x7f, 0x99, 0x06, 0xf7, 0xc5, 0xcd, 0xc0, 0x0d,
0x3f, 0x41, 0x9b, 0x31, 0x7c, 0xe9, 0x20, 0x27, 0xef, 0xc3, 0x9e, 0x9d, 0x1b, 0xf6, 0x2c, 0xfd,
0x3c, 0x46, 0x5f, 0xc4, 0x1b, 0x87, 0xfa, 0x33, 0x1d, 0xca, 0x02, 0x2a, 0x67, 0x17, 0xb6, 0xc9,
0x37, 0x6c, 0x1b, 0x7a, 0x17, 0x1e, 0x14, 0x45, 0xe3, 0x2f, 0x19, 0x54, 0x4e, 0x26, 0x14, 0xe3,
0x59, 0xef, 0x9a, 0xaa, 0x61, 0x74, 0x8d, 0x38, 0xf0, 0x44, 0xa9, 0x53, 0xfe, 0x09, 0xaf, 0xbb,
0xe2, 0x89, 0xaa, 0xab, 0x86, 0xd6, 0x8a, 0xfb, 0x21, 0x81, 0x9c, 0x10, 0x8f, 0xf8, 0xce, 0x18,
0xfe, 0xef, 0xa8, 0x82, 0x99, 0xfe, 0xb0, 0xf5, 0x34, 0x8e, 0x98, 0x17, 0x70, 0xca, 0x54, 0x7f,
0x31, 0x3e, 0xe7, 0xd1, 0x36, 0x58, 0xeb, 0x9c, 0x35, 0x3b, 0x5a, 0x5b, 0x40, 0x73, 0x72, 0x1d,
0xa0, 0x5b, 0x09, 0x54, 0x13, 0xaf, 0x03, 0x86, 0x6d, 0xd8, 0x68, 0xf7, 0xff, 0xcf, 0x22, 0x78,
0xb8, 0x14, 0x9a, 0xbd, 0x9e, 0xaa, 0xb7, 0xe3, 0xd3, 0x2f, 0x75, 0xcd, 0xf9, 0x9c, 0x78, 0x36,
0x43, 0x1c, 0x77, 0x8d, 0x13, 0x75, 0x10, 0x1f, 0x7e, 0x89, 0x38, 0xa6, 0xec, 0x5e, 0x3e, 0xda,
0x79, 0xf7, 0xcf, 0xdd, 0xb5, 0xf7, 0xf0, 0xf7, 0xee, 0xd3, 0x6e, 0xe6, 0x3d, 0xfc, 0xfd, 0xe3,
0xd3, 0xee, 0xda, 0xbf, 0xe1, 0xf7, 0xed, 0xbf, 0x76, 0x33, 0xa3, 0x02, 0x9f, 0x5d, 0x8f, 0xff,
0x17, 0x00, 0x00, 0xff, 0xff, 0x20, 0x74, 0xd7, 0x8f, 0x1b, 0x0e, 0x00, 0x00,
}

3
lib/protocol/bep.proto
View File

@ -106,7 +106,8 @@ message FileInfo {
Vector version = 9 [(gogoproto.nullable) = false];
int64 sequence = 10;
repeated BlockInfo Blocks = 16 [(gogoproto.nullable) = false];
repeated BlockInfo Blocks = 16 [(gogoproto.nullable) = false];
string symlink_target = 17;
}
enum FileInfoType {

15
lib/protocol/bep_extensions.go
View File

@ -30,8 +30,19 @@ func (m Hello) Magic() uint32 {
}
func (f FileInfo) String() string {
return fmt.Sprintf("File{Name:%q, Type:%v, Sequence:%d, Permissions:0%o, ModTime:%v, Version:%v, Length:%d, Deleted:%v, Invalid:%v, NoPermissions:%v, Blocks:%v}",
f.Name, f.Type, f.Sequence, f.Permissions, f.ModTime(), f.Version, f.Size, f.Deleted, f.Invalid, f.NoPermissions, f.Blocks)
switch f.Type {
case FileInfoTypeDirectory:
return fmt.Sprintf("Directory{Name:%q, Sequence:%d, Permissions:0%o, ModTime:%v, Version:%v, Deleted:%v, Invalid:%v, NoPermissions:%v}",
f.Name, f.Sequence, f.Permissions, f.ModTime(), f.Version, f.Deleted, f.Invalid, f.NoPermissions)
case FileInfoTypeFile:
return fmt.Sprintf("File{Name:%q, Sequence:%d, Permissions:0%o, ModTime:%v, Version:%v, Length:%d, Deleted:%v, Invalid:%v, NoPermissions:%v, Blocks:%v}",
f.Name, f.Sequence, f.Permissions, f.ModTime(), f.Version, f.Size, f.Deleted, f.Invalid, f.NoPermissions, f.Blocks)
case FileInfoTypeSymlinkDirectory, FileInfoTypeSymlinkFile, FileInfoTypeSymlinkUnknown:
return fmt.Sprintf("Symlink{Name:%q, Type:%v, Sequence:%d, Version:%v, Deleted:%v, Invalid:%v, NoPermissions:%v, SymlinkTarget:%q}",
f.Name, f.Type, f.Sequence, f.Version, f.Deleted, f.Invalid, f.NoPermissions, f.SymlinkTarget)
default:
panic("mystery file type detected")
}
}
func (f FileInfo) IsDeleted() bool {

16
lib/protocol/deviceid_test.pb.go
View File

@ -427,16 +427,16 @@ var (
)
var fileDescriptorDeviceidTest = []byte{
// 176 bytes of a gzipped FileDescriptorProto
// 171 bytes of a gzipped FileDescriptorProto
0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0xe2, 0x12, 0x4e, 0x49, 0x2d, 0xcb,
0x4c, 0x4e, 0xcd, 0x4c, 0x89, 0x2f, 0x49, 0x2d, 0x2e, 0xd1, 0x2b, 0x28, 0xca, 0x2f, 0xc9, 0x17,
0xe2, 0x00, 0x53, 0xc9, 0xf9, 0x39, 0x52, 0xba, 0xe9, 0x99, 0x25, 0x19, 0xa5, 0x49, 0x7a, 0xc9,
0xf9, 0xb9, 0xfa, 0xe9, 0xf9, 0xe9, 0xf9, 0xfa, 0x60, 0x99, 0xa4, 0xd2, 0x34, 0x30, 0x0f, 0xcc,
0x01, 0xb3, 0x20, 0x1a, 0x95, 0x54, 0xb9, 0xf8, 0x43, 0x52, 0x8b, 0x4b, 0xfc, 0x73, 0x52, 0x5c,
0xc0, 0xc6, 0x7a, 0xba, 0x08, 0x09, 0x71, 0xb1, 0x80, 0x4c, 0x96, 0x60, 0x54, 0x60, 0xd4, 0xe0,
0x09, 0x02, 0xb3, 0x95, 0xcc, 0x21, 0xca, 0xfc, 0x52, 0xcb, 0xe1, 0xca, 0x54, 0x90, 0x95, 0x39,
0x09, 0x9c, 0xb8, 0x27, 0xcf, 0x70, 0xeb, 0x9e, 0x3c, 0x07, 0x4c, 0x1e, 0xa2, 0xd1, 0x49, 0xe6,
0xc4, 0x43, 0x39, 0x86, 0x0b, 0x0f, 0xe5, 0x18, 0x4e, 0x3c, 0x92, 0x63, 0xbc, 0xf0, 0x48, 0x8e,
0xf1, 0xc1, 0x23, 0x39, 0x86, 0x17, 0x8f, 0xe4, 0x18, 0x16, 0x3c, 0x96, 0x63, 0x4c, 0x62, 0x03,
0x3b, 0xc2, 0x18, 0x10, 0x00, 0x00, 0xff, 0xff, 0x35, 0x9c, 0x00, 0x78, 0xd4, 0x00, 0x00, 0x00,
0x01, 0xb3, 0x20, 0x1a, 0x95, 0x54, 0xb9, 0xf8, 0x43, 0x80, 0xc6, 0xf8, 0xe7, 0xa4, 0xb8, 0x80,
0x8d, 0xf5, 0x74, 0x11, 0x12, 0xe2, 0x62, 0x01, 0x99, 0x2c, 0xc1, 0xa8, 0xc0, 0xa8, 0xc1, 0x13,
0x04, 0x66, 0x2b, 0x99, 0x43, 0x94, 0xf9, 0xa5, 0x96, 0xc3, 0x95, 0xa9, 0x20, 0x2b, 0x73, 0x12,
0x38, 0x71, 0x4f, 0x9e, 0xe1, 0xd6, 0x3d, 0x79, 0x0e, 0x98, 0x3c, 0x44, 0xa3, 0x93, 0xcc, 0x89,
0x87, 0x72, 0x0c, 0x17, 0x80, 0xf8, 0xc4, 0x23, 0x39, 0xc6, 0x0b, 0x40, 0xfc, 0xe0, 0x91, 0x1c,
0xc3, 0x0b, 0x20, 0x5e, 0xf0, 0x58, 0x8e, 0x31, 0x89, 0x0d, 0xec, 0x08, 0x63, 0x40, 0x00, 0x00,
0x00, 0xff, 0xff, 0x35, 0x9c, 0x00, 0x78, 0xd4, 0x00, 0x00, 0x00,
}

13
lib/scanner/walk.go
View File

@ -11,7 +11,6 @@ import (
"os"
"path/filepath"
"runtime"
"strings"
"sync/atomic"
"time"
"unicode/utf8"
@ -398,21 +397,15 @@ func (w *walker) walkSymlink(absPath, relPath string, dchan chan protocol.FileIn
return true, nil
}
blocks, err := Blocks(strings.NewReader(target), w.BlockSize, -1, nil)
if err != nil {
l.Debugln("hash link error:", absPath, err)
return true, nil
}
// A symlink is "unchanged", if
// - it exists
// - it wasn't deleted (because it isn't now)
// - it was a symlink
// - it wasn't invalid
// - the symlink type (file/dir) was the same
// - the block list (i.e. hash of target) was the same
// - the target was the same
cf, ok := w.CurrentFiler.CurrentFile(relPath)
if ok && !cf.IsDeleted() && cf.IsSymlink() && !cf.IsInvalid() && SymlinkTypeEqual(targetType, cf) && BlocksEqual(cf.Blocks, blocks) {
if ok && !cf.IsDeleted() && cf.IsSymlink() && !cf.IsInvalid() && SymlinkTypeEqual(targetType, cf) && cf.SymlinkTarget == target {
return true, nil
}
@ -421,7 +414,7 @@ func (w *walker) walkSymlink(absPath, relPath string, dchan chan protocol.FileIn
Type: SymlinkType(targetType),
Version: cf.Version.Update(w.ShortID),
NoPermissions: true, // Symlinks don't have permissions of their own
Blocks: blocks,
SymlinkTarget: target,
}
l.Debugln("symlink changedb:", absPath, f)

17
lib/scanner/walk_test.go
View File

@ -311,23 +311,16 @@ func TestWalkSymlink(t *testing.T) {
files = append(files, f)
}
// Verify that we got one symlink and with the correct block contents
// Verify that we got one symlink and with the correct attributes
if len(files) != 1 {
t.Errorf("expected 1 symlink, not %d", len(files))
}
if len(files[0].Blocks) != 1 {
t.Errorf("expected 1 block, not %d", len(files[0].Blocks))
if len(files[0].Blocks) != 0 {
t.Errorf("expected zero blocks for symlink, not %d", len(files[0].Blocks))
}
if files[0].Blocks[0].Size != int32(len("destination")) {
t.Errorf("expected block length %d, not %d", len("destination"), files[0].Blocks[0].Size)
}
// echo -n "destination" | openssl dgst -sha256
hash := "b5c755aaab1038b3d5627bbde7f47ca80c5f5c0481c6d33f04139d07aa1530e7"
if fmt.Sprintf("%x", files[0].Blocks[0].Hash) != hash {
t.Errorf("incorrect hash")
if files[0].SymlinkTarget != "destination" {
t.Errorf("expected symlink to have target destination, not %q", files[0].SymlinkTarget)
}
}

4
lib/symlinks/symlink_unix.go
View File

@ -35,7 +35,3 @@ func Read(path string) (string, TargetType, error) {
func Create(source, target string, tt TargetType) error {
return os.Symlink(osutil.NativeFilename(target), source)
}
func ChangeType(path string, tt TargetType) error {
return nil
}

22
lib/symlinks/symlink_windows.go
View File

@ -166,25 +166,3 @@ func Create(source, target string, tt TargetType) error {
}
return err
}
func ChangeType(path string, tt TargetType) error {
target, exTt, err := Read(path)
if err != nil {
return err
}
// If it's the same type, nothing to do.
if tt == exTt {
return nil
}
// If the actual type is unknown, but the new type is file, nothing to do
if exTt == TargetUnknown && tt != TargetDirectory {
return nil
}
return osutil.InWritableDir(func(path string) error {
// It should be a symlink as well hence no need to change permissions on
// the file.
os.Remove(path)
return Create(path, target, tt)
}, path)
}