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// Copyright (C) 2014 The Syncthing Authors.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at https://mozilla.org/MPL/2.0/.
package model
import (
"bytes"
"encoding/json"
"errors"
"fmt"
"net"
"path/filepath"
"reflect"
"regexp"
"runtime"
"strings"
stdsync "sync"
"time"
"github.com/syncthing/syncthing/lib/config"
"github.com/syncthing/syncthing/lib/connections"
"github.com/syncthing/syncthing/lib/db"
"github.com/syncthing/syncthing/lib/events"
"github.com/syncthing/syncthing/lib/fs"
"github.com/syncthing/syncthing/lib/ignore"
"github.com/syncthing/syncthing/lib/osutil"
"github.com/syncthing/syncthing/lib/protocol"
"github.com/syncthing/syncthing/lib/scanner"
"github.com/syncthing/syncthing/lib/stats"
"github.com/syncthing/syncthing/lib/sync"
"github.com/syncthing/syncthing/lib/upgrade"
"github.com/syncthing/syncthing/lib/versioner"
"github.com/thejerf/suture"
)
// How many files to send in each Index/IndexUpdate message.
const (
maxBatchSizeBytes = 250 * 1024 // Aim for making index messages no larger than 250 KiB (uncompressed)
maxBatchSizeFiles = 1000 // Either way, don't include more files than this
)
type service interface {
BringToFront(string)
Override()
Revert()
DelayScan(d time.Duration)
SchedulePull() // something relevant changed, we should try a pull
Jobs() ([]string, []string) // In progress, Queued
Scan(subs []string) error
Serve()
Stop()
CheckHealth() error
Errors() []FileError
WatchError() error
ForceRescan(file protocol.FileInfo) error
GetStatistics() stats.FolderStatistics
getState() (folderState, time.Time, error)
}
type Availability struct {
ID protocol.DeviceID `json:"id"`
FromTemporary bool `json:"fromTemporary"`
}
type Model interface {
suture.Service
connections.Model
AddFolder(cfg config.FolderConfiguration)
RestartFolder(from, to config.FolderConfiguration)
StartFolder(folder string)
ResetFolder(folder string)
DelayScan(folder string, next time.Duration)
ScanFolder(folder string) error
ScanFolders() map[string]error
ScanFolderSubdirs(folder string, subs []string) error
State(folder string) (string, time.Time, error)
FolderErrors(folder string) ([]FileError, error)
WatchError(folder string) error
Override(folder string)
Revert(folder string)
BringToFront(folder, file string)
GetIgnores(folder string) ([]string, []string, error)
SetIgnores(folder string, content []string) error
GetFolderVersions(folder string) (map[string][]versioner.FileVersion, error)
RestoreFolderVersions(folder string, versions map[string]time.Time) (map[string]string, error)
LocalChangedFiles(folder string, page, perpage int) []db.FileInfoTruncated
NeedFolderFiles(folder string, page, perpage int) ([]db.FileInfoTruncated, []db.FileInfoTruncated, []db.FileInfoTruncated)
RemoteNeedFolderFiles(device protocol.DeviceID, folder string, page, perpage int) ([]db.FileInfoTruncated, error)
CurrentFolderFile(folder string, file string) (protocol.FileInfo, bool)
CurrentGlobalFile(folder string, file string) (protocol.FileInfo, bool)
Availability(folder string, file protocol.FileInfo, block protocol.BlockInfo) []Availability
GlobalSize(folder string) db.Counts
LocalSize(folder string) db.Counts
NeedSize(folder string) db.Counts
ReceiveOnlyChangedSize(folder string) db.Counts
CurrentSequence(folder string) (int64, bool)
RemoteSequence(folder string) (int64, bool)
Completion(device protocol.DeviceID, folder string) FolderCompletion
ConnectionStats() map[string]interface{}
DeviceStatistics() map[string]stats.DeviceStatistics
FolderStatistics() map[string]stats.FolderStatistics
UsageReportingStats(version int, preview bool) map[string]interface{}
StartDeadlockDetector(timeout time.Duration)
GlobalDirectoryTree(folder, prefix string, levels int, dirsonly bool) map[string]interface{}
}
type model struct {
*suture.Supervisor
cfg config.Wrapper
db *db.Lowlevel
finder *db.BlockFinder
progressEmitter *ProgressEmitter
id protocol.DeviceID
shortID protocol.ShortID
cacheIgnoredFiles bool
protectedFiles []string
clientName string
clientVersion string
fmut sync.RWMutex // protects the below
folderCfgs map[string]config.FolderConfiguration // folder -> cfg
folderFiles map[string]*db.FileSet // folder -> files
deviceStatRefs map[protocol.DeviceID]*stats.DeviceStatisticsReference // deviceID -> statsRef
folderIgnores map[string]*ignore.Matcher // folder -> matcher object
folderRunners map[string]service // folder -> puller or scanner
folderRunnerTokens map[string][]suture.ServiceToken // folder -> tokens for puller or scanner
folderRestartMuts syncMutexMap // folder -> restart mutex
pmut sync.RWMutex // protects the below
conn map[protocol.DeviceID]connections.Connection
connRequestLimiters map[protocol.DeviceID]*byteSemaphore
closed map[protocol.DeviceID]chan struct{}
helloMessages map[protocol.DeviceID]protocol.HelloResult
deviceDownloads map[protocol.DeviceID]*deviceDownloadState
remotePausedFolders map[protocol.DeviceID][]string // deviceID -> folders
foldersRunning int32 // for testing only
}
type folderFactory func(*model, *db.FileSet, *ignore.Matcher, config.FolderConfiguration, versioner.Versioner, fs.Filesystem) service
var (
folderFactories = make(map[config.FolderType]folderFactory)
)
var (
errDeviceUnknown = errors.New("unknown device")
errDevicePaused = errors.New("device is paused")
errDeviceIgnored = errors.New("device is ignored")
ErrFolderPaused = errors.New("folder is paused")
errFolderNotRunning = errors.New("folder is not running")
errFolderMissing = errors.New("no such folder")
errNetworkNotAllowed = errors.New("network not allowed")
// errors about why a connection is closed
errIgnoredFolderRemoved = errors.New("folder no longer ignored")
errReplacingConnection = errors.New("replacing connection")
errStopped = errors.New("Syncthing is being stopped")
)
// NewModel creates and starts a new model. The model starts in read-only mode,
// where it sends index information to connected peers and responds to requests
// for file data without altering the local folder in any way.
func NewModel(cfg config.Wrapper, id protocol.DeviceID, clientName, clientVersion string, ldb *db.Lowlevel, protectedFiles []string) Model {
m := &model{
Supervisor: suture.New("model", suture.Spec{
Log: func(line string) {
l.Debugln(line)
},
PassThroughPanics: true,
}),
cfg: cfg,
db: ldb,
finder: db.NewBlockFinder(ldb),
progressEmitter: NewProgressEmitter(cfg),
id: id,
shortID: id.Short(),
cacheIgnoredFiles: cfg.Options().CacheIgnoredFiles,
protectedFiles: protectedFiles,
clientName: clientName,
clientVersion: clientVersion,
folderCfgs: make(map[string]config.FolderConfiguration),
folderFiles: make(map[string]*db.FileSet),
deviceStatRefs: make(map[protocol.DeviceID]*stats.DeviceStatisticsReference),
folderIgnores: make(map[string]*ignore.Matcher),
folderRunners: make(map[string]service),
folderRunnerTokens: make(map[string][]suture.ServiceToken),
conn: make(map[protocol.DeviceID]connections.Connection),
connRequestLimiters: make(map[protocol.DeviceID]*byteSemaphore),
closed: make(map[protocol.DeviceID]chan struct{}),
helloMessages: make(map[protocol.DeviceID]protocol.HelloResult),
deviceDownloads: make(map[protocol.DeviceID]*deviceDownloadState),
remotePausedFolders: make(map[protocol.DeviceID][]string),
fmut: sync.NewRWMutex(),
pmut: sync.NewRWMutex(),
}
m.Add(m.progressEmitter)
scanLimiter.setCapacity(cfg.Options().MaxConcurrentScans)
cfg.Subscribe(m)
return m
}
func (m *model) Stop() {
m.Supervisor.Stop()
devs := m.cfg.Devices()
ids := make([]protocol.DeviceID, 0, len(devs))
for id := range devs {
ids = append(ids, id)
}
m.pmut.RLock()
closed := make([]chan struct{}, 0, len(m.closed))
for _, c := range m.closed {
closed = append(closed, c)
}
m.pmut.RUnlock()
m.closeConns(ids, errStopped)
for _, c := range closed {
<-c
}
}
// StartDeadlockDetector starts a deadlock detector on the models locks which
// causes panics in case the locks cannot be acquired in the given timeout
// period.
func (m *model) StartDeadlockDetector(timeout time.Duration) {
l.Infof("Starting deadlock detector with %v timeout", timeout)
detector := newDeadlockDetector(timeout)
detector.Watch("fmut", m.fmut)
detector.Watch("pmut", m.pmut)
}
// StartFolder constructs the folder service and starts it.
func (m *model) StartFolder(folder string) {
m.fmut.Lock()
defer m.fmut.Unlock()
folderCfg := m.folderCfgs[folder]
m.startFolderLocked(folderCfg)
l.Infof("Ready to synchronize %s (%s)", folderCfg.Description(), folderCfg.Type)
}
// Need to hold lock on m.fmut when calling this.
func (m *model) startFolderLocked(cfg config.FolderConfiguration) {
if err := m.checkFolderRunningLocked(cfg.ID); err == errFolderMissing {
panic("cannot start nonexistent folder " + cfg.Description())
} else if err == nil {
panic("cannot start already running folder " + cfg.Description())
}
folderFactory, ok := folderFactories[cfg.Type]
if !ok {
panic(fmt.Sprintf("unknown folder type 0x%x", cfg.Type))
}
folder := cfg.ID
fset := m.folderFiles[folder]
// Find any devices for which we hold the index in the db, but the folder
// is not shared, and drop it.
expected := mapDevices(cfg.DeviceIDs())
for _, available := range fset.ListDevices() {
if _, ok := expected[available]; !ok {
l.Debugln("dropping", folder, "state for", available)
fset.Drop(available)
}
}
// Close connections to affected devices
m.fmut.Unlock()
m.closeConns(cfg.DeviceIDs(), fmt.Errorf("started folder %v", cfg.Description()))
m.fmut.Lock()
v, ok := fset.Sequence(protocol.LocalDeviceID), true
indexHasFiles := ok && v > 0
if !indexHasFiles {
// It's a blank folder, so this may the first time we're looking at
// it. Attempt to create and tag with our marker as appropriate. We
// don't really do anything with errors at this point except warn -
// if these things don't work, we still want to start the folder and
// it'll show up as errored later.
if err := cfg.CreateRoot(); err != nil {
l.Warnln("Failed to create folder root directory", err)
} else if err = cfg.CreateMarker(); err != nil {
l.Warnln("Failed to create folder marker:", err)
}
}
ver := cfg.Versioner()
if service, ok := ver.(suture.Service); ok {
// The versioner implements the suture.Service interface, so
// expects to be run in the background in addition to being called
// when files are going to be archived.
token := m.Add(service)
m.folderRunnerTokens[folder] = append(m.folderRunnerTokens[folder], token)
}
ffs := fset.MtimeFS()
// These are our metadata files, and they should always be hidden.
ffs.Hide(config.DefaultMarkerName)
ffs.Hide(".stversions")
ffs.Hide(".stignore")
p := folderFactory(m, fset, m.folderIgnores[folder], cfg, ver, ffs)
m.folderRunners[folder] = p
m.warnAboutOverwritingProtectedFiles(folder)
token := m.Add(p)
m.folderRunnerTokens[folder] = append(m.folderRunnerTokens[folder], token)
}
func (m *model) warnAboutOverwritingProtectedFiles(folder string) {
if m.folderCfgs[folder].Type == config.FolderTypeSendOnly {
return
}
// This is a bit of a hack.
ffs := m.folderCfgs[folder].Filesystem()
if ffs.Type() != fs.FilesystemTypeBasic {
return
}
folderLocation := ffs.URI()
ignores := m.folderIgnores[folder]
var filesAtRisk []string
for _, protectedFilePath := range m.protectedFiles {
// check if file is synced in this folder
if protectedFilePath != folderLocation && !fs.IsParent(protectedFilePath, folderLocation) {
continue
}
// check if file is ignored
relPath, _ := filepath.Rel(folderLocation, protectedFilePath)
if ignores.Match(relPath).IsIgnored() {
continue
}
filesAtRisk = append(filesAtRisk, protectedFilePath)
}
if len(filesAtRisk) > 0 {
l.Warnln("Some protected files may be overwritten and cause issues. See https://docs.syncthing.net/users/config.html#syncing-configuration-files for more information. The at risk files are:", strings.Join(filesAtRisk, ", "))
}
}
func (m *model) AddFolder(cfg config.FolderConfiguration) {
if len(cfg.ID) == 0 {
panic("cannot add empty folder id")
}
if len(cfg.Path) == 0 {
panic("cannot add empty folder path")
}
m.fmut.Lock()
defer m.fmut.Unlock()
m.addFolderLocked(cfg)
}
func (m *model) addFolderLocked(cfg config.FolderConfiguration) {
m.folderCfgs[cfg.ID] = cfg
folderFs := cfg.Filesystem()
m.folderFiles[cfg.ID] = db.NewFileSet(cfg.ID, folderFs, m.db)
ignores := ignore.New(folderFs, ignore.WithCache(m.cacheIgnoredFiles))
if err := ignores.Load(".stignore"); err != nil && !fs.IsNotExist(err) {
l.Warnln("Loading ignores:", err)
}
m.folderIgnores[cfg.ID] = ignores
}
func (m *model) RemoveFolder(cfg config.FolderConfiguration) {
m.fmut.Lock()
defer m.fmut.Unlock()
// Delete syncthing specific files
cfg.Filesystem().RemoveAll(config.DefaultMarkerName)
m.tearDownFolderLocked(cfg, fmt.Errorf("removing folder %v", cfg.Description()))
// Remove it from the database
db.DropFolder(m.db, cfg.ID)
}
// Need to hold lock on m.fmut when calling this.
func (m *model) tearDownFolderLocked(cfg config.FolderConfiguration, err error) {
// Stop the services running for this folder and wait for them to finish
// stopping to prevent races on restart.
tokens := m.folderRunnerTokens[cfg.ID]
m.fmut.Unlock()
// Close connections to affected devices
// Must happen before stopping the folder service to abort ongoing
// transmissions and thus allow timely service termination.
m.closeConns(cfg.DeviceIDs(), err)
for _, id := range tokens {
m.RemoveAndWait(id, 0)
}
m.fmut.Lock()
// Clean up our config maps
delete(m.folderCfgs, cfg.ID)
delete(m.folderFiles, cfg.ID)
delete(m.folderIgnores, cfg.ID)
delete(m.folderRunners, cfg.ID)
delete(m.folderRunnerTokens, cfg.ID)
}
func (m *model) RestartFolder(from, to config.FolderConfiguration) {
if len(to.ID) == 0 {
panic("bug: cannot restart empty folder ID")
}
if to.ID != from.ID {
panic(fmt.Sprintf("bug: folder restart cannot change ID %q -> %q", from.ID, to.ID))
}
// This mutex protects the entirety of the restart operation, preventing
// there from being more than one folder restart operation in progress
// at any given time. The usual fmut/pmut stuff doesn't cover this,
// because those locks are released while we are waiting for the folder
// to shut down (and must be so because the folder might need them as
// part of its operations before shutting down).
restartMut := m.folderRestartMuts.Get(to.ID)
restartMut.Lock()
defer restartMut.Unlock()
var infoMsg string
var errMsg string
switch {
case to.Paused:
infoMsg = "Paused"
errMsg = "pausing"
case from.Paused:
infoMsg = "Unpaused"
errMsg = "unpausing"
default:
infoMsg = "Restarted"
errMsg = "restarting"
}
m.fmut.Lock()
defer m.fmut.Unlock()
m.tearDownFolderLocked(from, fmt.Errorf("%v folder %v", errMsg, to.Description()))
if !to.Paused {
m.addFolderLocked(to)
m.startFolderLocked(to)
}
l.Infof("%v folder %v (%v)", infoMsg, to.Description(), to.Type)
}
func (m *model) UsageReportingStats(version int, preview bool) map[string]interface{} {
stats := make(map[string]interface{})
if version >= 3 {
// Block stats
blockStatsMut.Lock()
copyBlockStats := make(map[string]int)
for k, v := range blockStats {
copyBlockStats[k] = v
if !preview {
blockStats[k] = 0
}
}
blockStatsMut.Unlock()
stats["blockStats"] = copyBlockStats
// Transport stats
m.pmut.RLock()
transportStats := make(map[string]int)
for _, conn := range m.conn {
transportStats[conn.Transport()]++
}
m.pmut.RUnlock()
stats["transportStats"] = transportStats
// Ignore stats
ignoreStats := map[string]int{
"lines": 0,
"inverts": 0,
"folded": 0,
"deletable": 0,
"rooted": 0,
"includes": 0,
"escapedIncludes": 0,
"doubleStars": 0,
"stars": 0,
}
var seenPrefix [3]bool
for folder := range m.cfg.Folders() {
lines, _, err := m.GetIgnores(folder)
if err != nil {
continue
}
ignoreStats["lines"] += len(lines)
for _, line := range lines {
// Allow prefixes to be specified in any order, but only once.
for {
if strings.HasPrefix(line, "!") && !seenPrefix[0] {
seenPrefix[0] = true
line = line[1:]
ignoreStats["inverts"] += 1
} else if strings.HasPrefix(line, "(?i)") && !seenPrefix[1] {
seenPrefix[1] = true
line = line[4:]
ignoreStats["folded"] += 1
} else if strings.HasPrefix(line, "(?d)") && !seenPrefix[2] {
seenPrefix[2] = true
line = line[4:]
ignoreStats["deletable"] += 1
} else {
seenPrefix[0] = false
seenPrefix[1] = false
seenPrefix[2] = false
break
}
}
// Noops, remove
line = strings.TrimSuffix(line, "**")
line = strings.TrimPrefix(line, "**/")
if strings.HasPrefix(line, "/") {
ignoreStats["rooted"] += 1
} else if strings.HasPrefix(line, "#include ") {
ignoreStats["includes"] += 1
if strings.Contains(line, "..") {
ignoreStats["escapedIncludes"] += 1
}
}
if strings.Contains(line, "**") {
ignoreStats["doubleStars"] += 1
// Remove not to trip up star checks.
line = strings.Replace(line, "**", "", -1)
}
if strings.Contains(line, "*") {
ignoreStats["stars"] += 1
}
}
}
stats["ignoreStats"] = ignoreStats
}
return stats
}
type ConnectionInfo struct {
protocol.Statistics
Connected bool
Paused bool
Address string
ClientVersion string
Type string
Crypto string
}
func (info ConnectionInfo) MarshalJSON() ([]byte, error) {
return json.Marshal(map[string]interface{}{
"at": info.At,
"inBytesTotal": info.InBytesTotal,
"outBytesTotal": info.OutBytesTotal,
"connected": info.Connected,
"paused": info.Paused,
"address": info.Address,
"clientVersion": info.ClientVersion,
"type": info.Type,
"crypto": info.Crypto,
})
}
// ConnectionStats returns a map with connection statistics for each device.
func (m *model) ConnectionStats() map[string]interface{} {
m.fmut.RLock()
m.pmut.RLock()
defer m.pmut.RUnlock()
defer m.fmut.RUnlock()
res := make(map[string]interface{})
devs := m.cfg.Devices()
conns := make(map[string]ConnectionInfo, len(devs))
for device, deviceCfg := range devs {
hello := m.helloMessages[device]
versionString := hello.ClientVersion
if hello.ClientName != "syncthing" {
versionString = hello.ClientName + " " + hello.ClientVersion
}
ci := ConnectionInfo{
ClientVersion: strings.TrimSpace(versionString),
Paused: deviceCfg.Paused,
}
if conn, ok := m.conn[device]; ok {
ci.Type = conn.Type()
ci.Crypto = conn.Crypto()
ci.Connected = ok
ci.Statistics = conn.Statistics()
if addr := conn.RemoteAddr(); addr != nil {
ci.Address = addr.String()
}
}
conns[device.String()] = ci
}
res["connections"] = conns
in, out := protocol.TotalInOut()
res["total"] = ConnectionInfo{
Statistics: protocol.Statistics{
At: time.Now(),
InBytesTotal: in,
OutBytesTotal: out,
},
}
return res
}
// DeviceStatistics returns statistics about each device
func (m *model) DeviceStatistics() map[string]stats.DeviceStatistics {
res := make(map[string]stats.DeviceStatistics)
for id := range m.cfg.Devices() {
res[id.String()] = m.deviceStatRef(id).GetStatistics()
}
return res
}
// FolderStatistics returns statistics about each folder
func (m *model) FolderStatistics() map[string]stats.FolderStatistics {
res := make(map[string]stats.FolderStatistics)
m.fmut.RLock()
defer m.fmut.RUnlock()
for id, runner := range m.folderRunners {
res[id] = runner.GetStatistics()
}
return res
}
type FolderCompletion struct {
CompletionPct float64
NeedBytes int64
NeedItems int64
GlobalBytes int64
NeedDeletes int64
}
// Map returns the members as a map, e.g. used in api to serialize as Json.
func (comp FolderCompletion) Map() map[string]interface{} {
return map[string]interface{}{
"completion": comp.CompletionPct,
"needBytes": comp.NeedBytes,
"needItems": comp.NeedItems,
"globalBytes": comp.GlobalBytes,
"needDeletes": comp.NeedDeletes,
}
}
// Completion returns the completion status, in percent, for the given device
// and folder.
func (m *model) Completion(device protocol.DeviceID, folder string) FolderCompletion {
m.fmut.RLock()
rf, ok := m.folderFiles[folder]
m.fmut.RUnlock()
if !ok {
return FolderCompletion{} // Folder doesn't exist, so we hardly have any of it
}
tot := rf.GlobalSize().Bytes
if tot == 0 {
// Folder is empty, so we have all of it
return FolderCompletion{
CompletionPct: 100,
}
}
m.pmut.RLock()
counts := m.deviceDownloads[device].GetBlockCounts(folder)
m.pmut.RUnlock()
var need, items, fileNeed, downloaded, deletes int64
rf.WithNeedTruncated(device, func(f db.FileIntf) bool {
ft := f.(db.FileInfoTruncated)
// If the file is deleted, we account it only in the deleted column.
if ft.Deleted {
deletes++
return true
}
// This might might be more than it really is, because some blocks can be of a smaller size.
downloaded = int64(counts[ft.Name] * int(ft.BlockSize()))
fileNeed = ft.FileSize() - downloaded
if fileNeed < 0 {
fileNeed = 0
}
need += fileNeed
items++
return true
})
needRatio := float64(need) / float64(tot)
completionPct := 100 * (1 - needRatio)
// If the completion is 100% but there are deletes we need to handle,
// drop it down a notch. Hack for consumers that look only at the
// percentage (our own GUI does the same calculation as here on its own
// and needs the same fixup).
if need == 0 && deletes > 0 {
completionPct = 95 // chosen by fair dice roll
}
l.Debugf("%v Completion(%s, %q): %f (%d / %d = %f)", m, device, folder, completionPct, need, tot, needRatio)
return FolderCompletion{
CompletionPct: completionPct,
NeedBytes: need,
NeedItems: items,
GlobalBytes: tot,
NeedDeletes: deletes,
}
}
func addSizeOfFile(s *db.Counts, f db.FileIntf) {
switch {
case f.IsDeleted():
s.Deleted++
case f.IsDirectory():
s.Directories++
case f.IsSymlink():
s.Symlinks++
default:
s.Files++
}
s.Bytes += f.FileSize()
}
// GlobalSize returns the number of files, deleted files and total bytes for all
// files in the global model.
func (m *model) GlobalSize(folder string) db.Counts {
m.fmut.RLock()
defer m.fmut.RUnlock()
if rf, ok := m.folderFiles[folder]; ok {
return rf.GlobalSize()
}
return db.Counts{}
}
// LocalSize returns the number of files, deleted files and total bytes for all
// files in the local folder.
func (m *model) LocalSize(folder string) db.Counts {
m.fmut.RLock()
defer m.fmut.RUnlock()
if rf, ok := m.folderFiles[folder]; ok {
return rf.LocalSize()
}
return db.Counts{}
}
// ReceiveOnlyChangedSize returns the number of files, deleted files and
// total bytes for all files that have changed locally in a receieve only
// folder.
func (m *model) ReceiveOnlyChangedSize(folder string) db.Counts {
m.fmut.RLock()
defer m.fmut.RUnlock()
if rf, ok := m.folderFiles[folder]; ok {
return rf.ReceiveOnlyChangedSize()
}
return db.Counts{}
}
// NeedSize returns the number and total size of currently needed files.
func (m *model) NeedSize(folder string) db.Counts {
m.fmut.RLock()
rf, ok := m.folderFiles[folder]
cfg := m.folderCfgs[folder]
m.fmut.RUnlock()
var result db.Counts
if ok {
rf.WithNeedTruncated(protocol.LocalDeviceID, func(f db.FileIntf) bool {
if cfg.IgnoreDelete && f.IsDeleted() {
return true
}
addSizeOfFile(&result, f)
return true
})
}
result.Bytes -= m.progressEmitter.BytesCompleted(folder)
l.Debugf("%v NeedSize(%q): %v", m, folder, result)
return result
}
// NeedFolderFiles returns paginated list of currently needed files in
// progress, queued, and to be queued on next puller iteration, as well as the
// total number of files currently needed.
func (m *model) NeedFolderFiles(folder string, page, perpage int) ([]db.FileInfoTruncated, []db.FileInfoTruncated, []db.FileInfoTruncated) {
m.fmut.RLock()
rf, rfOk := m.folderFiles[folder]
runner, runnerOk := m.folderRunners[folder]
cfg := m.folderCfgs[folder]
m.fmut.RUnlock()
if !rfOk {
return nil, nil, nil
}
var progress, queued, rest []db.FileInfoTruncated
var seen map[string]struct{}
skip := (page - 1) * perpage
get := perpage
if runnerOk {
allProgressNames, allQueuedNames := runner.Jobs()
var progressNames, queuedNames []string
progressNames, skip, get = getChunk(allProgressNames, skip, get)
queuedNames, skip, get = getChunk(allQueuedNames, skip, get)
progress = make([]db.FileInfoTruncated, len(progressNames))
queued = make([]db.FileInfoTruncated, len(queuedNames))
seen = make(map[string]struct{}, len(progressNames)+len(queuedNames))
for i, name := range progressNames {
if f, ok := rf.GetGlobalTruncated(name); ok {
progress[i] = f
seen[name] = struct{}{}
}
}
for i, name := range queuedNames {
if f, ok := rf.GetGlobalTruncated(name); ok {
queued[i] = f
seen[name] = struct{}{}
}
}
}
rest = make([]db.FileInfoTruncated, 0, perpage)
rf.WithNeedTruncated(protocol.LocalDeviceID, func(f db.FileIntf) bool {
if cfg.IgnoreDelete && f.IsDeleted() {
return true
}
if skip > 0 {
skip--
return true
}
ft := f.(db.FileInfoTruncated)
if _, ok := seen[ft.Name]; !ok {
rest = append(rest, ft)
get--
}
return get > 0
})
return progress, queued, rest
}
// LocalChangedFiles returns a paginated list of currently needed files in
// progress, queued, and to be queued on next puller iteration, as well as the
// total number of files currently needed.
func (m *model) LocalChangedFiles(folder string, page, perpage int) []db.FileInfoTruncated {
m.fmut.RLock()
rf, ok := m.folderFiles[folder]
fcfg := m.folderCfgs[folder]
m.fmut.RUnlock()
if !ok {
return nil
}
if fcfg.Type != config.FolderTypeReceiveOnly {
return nil
}
if rf.ReceiveOnlyChangedSize().TotalItems() == 0 {
return nil
}
files := make([]db.FileInfoTruncated, 0, perpage)
skip := (page - 1) * perpage
get := perpage
rf.WithHaveTruncated(protocol.LocalDeviceID, func(f db.FileIntf) bool {
if !f.IsReceiveOnlyChanged() {
return true
}
if skip > 0 {
skip--
return true
}
ft := f.(db.FileInfoTruncated)
files = append(files, ft)
get--
return get > 0
})
return files
}
// RemoteNeedFolderFiles returns paginated list of currently needed files in
// progress, queued, and to be queued on next puller iteration, as well as the
// total number of files currently needed.
func (m *model) RemoteNeedFolderFiles(device protocol.DeviceID, folder string, page, perpage int) ([]db.FileInfoTruncated, error) {
m.fmut.RLock()
m.pmut.RLock()
err := m.checkDeviceFolderConnectedLocked(device, folder)
rf := m.folderFiles[folder]
m.pmut.RUnlock()
m.fmut.RUnlock()
if err != nil {
return nil, err
}
files := make([]db.FileInfoTruncated, 0, perpage)
skip := (page - 1) * perpage
get := perpage
rf.WithNeedTruncated(device, func(f db.FileIntf) bool {
if skip > 0 {
skip--
return true
}
files = append(files, f.(db.FileInfoTruncated))
get--
return get > 0
})
return files, nil
}
// Index is called when a new device is connected and we receive their full index.
// Implements the protocol.Model interface.
func (m *model) Index(deviceID protocol.DeviceID, folder string, fs []protocol.FileInfo) {
m.handleIndex(deviceID, folder, fs, false)
}
// IndexUpdate is called for incremental updates to connected devices' indexes.
// Implements the protocol.Model interface.
func (m *model) IndexUpdate(deviceID protocol.DeviceID, folder string, fs []protocol.FileInfo) {
m.handleIndex(deviceID, folder, fs, true)
}
func (m *model) handleIndex(deviceID protocol.DeviceID, folder string, fs []protocol.FileInfo, update bool) {
op := "Index"
if update {
op += " update"
}
l.Debugf("%v (in): %s / %q: %d files", op, deviceID, folder, len(fs))
if cfg, ok := m.cfg.Folder(folder); !ok || !cfg.SharedWith(deviceID) {
l.Infof("%v for unexpected folder ID %q sent from device %q; ensure that the folder exists and that this device is selected under \"Share With\" in the folder configuration.", op, folder, deviceID)
return
} else if cfg.Paused {
l.Debugf("%v for paused folder (ID %q) sent from device %q.", op, folder, deviceID)
return
}
m.fmut.RLock()
files, existing := m.folderFiles[folder]
runner, running := m.folderRunners[folder]
m.fmut.RUnlock()
if !existing {
panic(fmt.Sprintf("%v for nonexistent folder %q", op, folder))
}
if running {
defer runner.SchedulePull()
} else if update {
// Runner may legitimately not be set if this is the "cleanup" Index
// message at startup.
panic(fmt.Sprintf("%v for not running folder %q", op, folder))
}
m.pmut.RLock()
m.deviceDownloads[deviceID].Update(folder, makeForgetUpdate(fs))
m.pmut.RUnlock()
if !update {
files.Drop(deviceID)
}
for i := range fs {
// The local flags should never be transmitted over the wire. Make
// sure they look like they weren't.
fs[i].LocalFlags = 0
}
files.Update(deviceID, fs)
events.Default.Log(events.RemoteIndexUpdated, map[string]interface{}{
"device": deviceID.String(),
"folder": folder,
"items": len(fs),
"version": files.Sequence(deviceID),
})
}
func (m *model) ClusterConfig(deviceID protocol.DeviceID, cm protocol.ClusterConfig) {
// Check the peer device's announced folders against our own. Emits events
// for folders that we don't expect (unknown or not shared).
// Also, collect a list of folders we do share, and if he's interested in
// temporary indexes, subscribe the connection.
tempIndexFolders := make([]string, 0, len(cm.Folders))
m.pmut.RLock()
conn, ok := m.conn[deviceID]
closed := m.closed[deviceID]
hello := m.helloMessages[deviceID]
m.pmut.RUnlock()
if !ok {
panic("bug: ClusterConfig called on closed or nonexistent connection")
}
changed := false
deviceCfg := m.cfg.Devices()[deviceID]
// See issue #3802 - in short, we can't send modern symlink entries to older
// clients.
dropSymlinks := false
if hello.ClientName == m.clientName && upgrade.CompareVersions(hello.ClientVersion, "v0.14.14") < 0 {
l.Warnln("Not sending symlinks to old client", deviceID, "- please upgrade to v0.14.14 or newer")
dropSymlinks = true
}
// Needs to happen outside of the fmut, as can cause CommitConfiguration
if deviceCfg.AutoAcceptFolders {
for _, folder := range cm.Folders {
changed = m.handleAutoAccepts(deviceCfg, folder) || changed
}
}
m.fmut.Lock()
defer m.fmut.Unlock()
var paused []string
for _, folder := range cm.Folders {
cfg, ok := m.cfg.Folder(folder.ID)
if !ok || !cfg.SharedWith(deviceID) {
if deviceCfg.IgnoredFolder(folder.ID) {
l.Infof("Ignoring folder %s from device %s since we are configured to", folder.Description(), deviceID)
continue
}
m.cfg.AddOrUpdatePendingFolder(folder.ID, folder.Label, deviceID)
events.Default.Log(events.FolderRejected, map[string]string{
"folder": folder.ID,
"folderLabel": folder.Label,
"device": deviceID.String(),
})
l.Infof("Unexpected folder %s sent from device %q; ensure that the folder exists and that this device is selected under \"Share With\" in the folder configuration.", folder.Description(), deviceID)
continue
}
if folder.Paused {
paused = append(paused, folder.ID)
continue
}
if cfg.Paused {
continue
}
fs, ok := m.folderFiles[folder.ID]
if !ok {
// Shouldn't happen because !cfg.Paused, but might happen
// if the folder is about to be unpaused, but not yet.
continue
}
if !folder.DisableTempIndexes {
tempIndexFolders = append(tempIndexFolders, folder.ID)
}
myIndexID := fs.IndexID(protocol.LocalDeviceID)
mySequence := fs.Sequence(protocol.LocalDeviceID)
var startSequence int64
for _, dev := range folder.Devices {
if dev.ID == m.id {
// This is the other side's description of what it knows
// about us. Lets check to see if we can start sending index
// updates directly or need to send the index from start...
if dev.IndexID == myIndexID {
// They say they've seen our index ID before, so we can
// send a delta update only.
if dev.MaxSequence > mySequence {
// Safety check. They claim to have more or newer
// index data than we have - either we have lost
// index data, or reset the index without resetting
// the IndexID, or something else weird has
// happened. We send a full index to reset the
// situation.
l.Infof("Device %v folder %s is delta index compatible, but seems out of sync with reality", deviceID, folder.Description())
startSequence = 0
continue
}
l.Debugf("Device %v folder %s is delta index compatible (mlv=%d)", deviceID, folder.Description(), dev.MaxSequence)
startSequence = dev.MaxSequence
} else if dev.IndexID != 0 {
// They say they've seen an index ID from us, but it's
// not the right one. Either they are confused or we
// must have reset our database since last talking to
// them. We'll start with a full index transfer.
l.Infof("Device %v folder %s has mismatching index ID for us (%v != %v)", deviceID, folder.Description(), dev.IndexID, myIndexID)
startSequence = 0
}
} else if dev.ID == deviceID {
// This is the other side's description of themselves. We
// check to see that it matches the IndexID we have on file,
// otherwise we drop our old index data and expect to get a
// completely new set.
theirIndexID := fs.IndexID(deviceID)
if dev.IndexID == 0 {
// They're not announcing an index ID. This means they
// do not support delta indexes and we should clear any
// information we have from them before accepting their
// index, which will presumably be a full index.
fs.Drop(deviceID)
} else if dev.IndexID != theirIndexID {
// The index ID we have on file is not what they're
// announcing. They must have reset their database and
// will probably send us a full index. We drop any
// information we have and remember this new index ID
// instead.
l.Infof("Device %v folder %s has a new index ID (%v)", deviceID, folder.Description(), dev.IndexID)
fs.Drop(deviceID)
fs.SetIndexID(deviceID, dev.IndexID)
} else {
// They're sending a recognized index ID and will most
// likely use delta indexes. We might already have files
// that we need to pull so let the folder runner know
// that it should recheck the index data.
if runner := m.folderRunners[folder.ID]; runner != nil {
defer runner.SchedulePull()
}
}
}
}
// The token isn't tracked as the service stops when the connection
// terminates and is automatically removed from supervisor (by
// implementing suture.IsCompletable).
m.Add(&indexSender{
conn: conn,
connClosed: closed,
folder: folder.ID,
fset: fs,
prevSequence: startSequence,
dropSymlinks: dropSymlinks,
stop: make(chan struct{}),
stopped: make(chan struct{}),
})
}
m.pmut.Lock()
m.remotePausedFolders[deviceID] = paused
m.pmut.Unlock()
// This breaks if we send multiple CM messages during the same connection.
if len(tempIndexFolders) > 0 {
m.pmut.RLock()
conn, ok := m.conn[deviceID]
m.pmut.RUnlock()
// In case we've got ClusterConfig, and the connection disappeared
// from infront of our nose.
if ok {
m.progressEmitter.temporaryIndexSubscribe(conn, tempIndexFolders)
}
}
if deviceCfg.Introducer {
foldersDevices, introduced := m.handleIntroductions(deviceCfg, cm)
if introduced {
changed = true
}
// If permitted, check if the introducer has unshare devices/folders with
// some of the devices/folders that we know were introduced to us by him.
if !deviceCfg.SkipIntroductionRemovals && m.handleDeintroductions(deviceCfg, cm, foldersDevices) {
changed = true
}
}
if changed {
if err := m.cfg.Save(); err != nil {
l.Warnln("Failed to save config", err)
}
}
}
// handleIntroductions handles adding devices/shares that are shared by an introducer device
func (m *model) handleIntroductions(introducerCfg config.DeviceConfiguration, cm protocol.ClusterConfig) (folderDeviceSet, bool) {
// This device is an introducer. Go through the announced lists of folders
// and devices and add what we are missing, remove what we have extra that
// has been introducer by the introducer.
changed := false
foldersDevices := make(folderDeviceSet)
for _, folder := range cm.Folders {
// Adds devices which we do not have, but the introducer has
// for the folders that we have in common. Also, shares folders
// with devices that we have in common, yet are currently not sharing
// the folder.
fcfg, ok := m.cfg.Folder(folder.ID)
if !ok {
// Don't have this folder, carry on.
continue
}
for _, device := range folder.Devices {
// No need to share with self.
if device.ID == m.id {
continue
}
foldersDevices.set(device.ID, folder.ID)
if _, ok := m.cfg.Devices()[device.ID]; !ok {
// The device is currently unknown. Add it to the config.
m.introduceDevice(device, introducerCfg)
} else if fcfg.SharedWith(device.ID) {
// We already share the folder with this device, so
// nothing to do.
continue
}
// We don't yet share this folder with this device. Add the device
// to sharing list of the folder.
l.Infof("Sharing folder %s with %v (vouched for by introducer %v)", folder.Description(), device.ID, introducerCfg.DeviceID)
fcfg.Devices = append(fcfg.Devices, config.FolderDeviceConfiguration{
DeviceID: device.ID,
IntroducedBy: introducerCfg.DeviceID,
})
changed = true
}
if changed {
m.cfg.SetFolder(fcfg)
}
}
return foldersDevices, changed
}
// handleDeintroductions handles removals of devices/shares that are removed by an introducer device
func (m *model) handleDeintroductions(introducerCfg config.DeviceConfiguration, cm protocol.ClusterConfig, foldersDevices folderDeviceSet) bool {
changed := false
devicesNotIntroduced := make(map[protocol.DeviceID]struct{})
folders := m.cfg.FolderList()
// Check if we should unshare some folders, if the introducer has unshared them.
for i := range folders {
for k := 0; k < len(folders[i].Devices); k++ {
if folders[i].Devices[k].IntroducedBy != introducerCfg.DeviceID {
devicesNotIntroduced[folders[i].Devices[k].DeviceID] = struct{}{}
continue
}
if !foldersDevices.has(folders[i].Devices[k].DeviceID, folders[i].ID) {
// We could not find that folder shared on the
// introducer with the device that was introduced to us.
// We should follow and unshare as well.
l.Infof("Unsharing folder %s with %v as introducer %v no longer shares the folder with that device", folders[i].Description(), folders[i].Devices[k].DeviceID, folders[i].Devices[k].IntroducedBy)
folders[i].Devices = append(folders[i].Devices[:k], folders[i].Devices[k+1:]...)
k--
changed = true
}
}
}
// Check if we should remove some devices, if the introducer no longer
// shares any folder with them. Yet do not remove if we share other
// folders that haven't been introduced by the introducer.
devMap := m.cfg.Devices()
devices := make([]config.DeviceConfiguration, 0, len(devMap))
for deviceID, device := range devMap {
if device.IntroducedBy == introducerCfg.DeviceID {
if !foldersDevices.hasDevice(deviceID) {
if _, ok := devicesNotIntroduced[deviceID]; !ok {
// The introducer no longer shares any folder with the
// device, remove the device.
l.Infof("Removing device %v as introducer %v no longer shares any folders with that device", deviceID, device.IntroducedBy)
changed = true
continue
}
l.Infof("Would have removed %v as %v no longer shares any folders, yet there are other folders that are shared with this device that haven't been introduced by this introducer.", deviceID, device.IntroducedBy)
}
}
devices = append(devices, device)
}
if changed {
cfg := m.cfg.RawCopy()
cfg.Folders = folders
cfg.Devices = devices
m.cfg.Replace(cfg)
}
return changed
}
// handleAutoAccepts handles adding and sharing folders for devices that have
// AutoAcceptFolders set to true.
func (m *model) handleAutoAccepts(deviceCfg config.DeviceConfiguration, folder protocol.Folder) bool {
if cfg, ok := m.cfg.Folder(folder.ID); !ok {
defaultPath := m.cfg.Options().DefaultFolderPath
defaultPathFs := fs.NewFilesystem(fs.FilesystemTypeBasic, defaultPath)
pathAlternatives := []string{
sanitizePath(folder.Label),
sanitizePath(folder.ID),
}
for _, path := range pathAlternatives {
if _, err := defaultPathFs.Lstat(path); !fs.IsNotExist(err) {
continue
}
fcfg := config.NewFolderConfiguration(m.id, folder.ID, folder.Label, fs.FilesystemTypeBasic, filepath.Join(defaultPath, path))
fcfg.Devices = append(fcfg.Devices, config.FolderDeviceConfiguration{
DeviceID: deviceCfg.DeviceID,
})
// Need to wait for the waiter, as this calls CommitConfiguration,
// which sets up the folder and as we return from this call,
// ClusterConfig starts poking at m.folderFiles and other things
// that might not exist until the config is committed.
w, _ := m.cfg.SetFolder(fcfg)
w.Wait()
l.Infof("Auto-accepted %s folder %s at path %s", deviceCfg.DeviceID, folder.Description(), fcfg.Path)
return true
}
l.Infof("Failed to auto-accept folder %s from %s due to path conflict", folder.Description(), deviceCfg.DeviceID)
return false
} else {
for _, device := range cfg.DeviceIDs() {
if device == deviceCfg.DeviceID {
// Already shared nothing todo.
return false
}
}
cfg.Devices = append(cfg.Devices, config.FolderDeviceConfiguration{
DeviceID: deviceCfg.DeviceID,
})
w, _ := m.cfg.SetFolder(cfg)
w.Wait()
l.Infof("Shared %s with %s due to auto-accept", folder.ID, deviceCfg.DeviceID)
return true
}
}
func (m *model) introduceDevice(device protocol.Device, introducerCfg config.DeviceConfiguration) {
addresses := []string{"dynamic"}
for _, addr := range device.Addresses {
if addr != "dynamic" {
addresses = append(addresses, addr)
}
}
l.Infof("Adding device %v to config (vouched for by introducer %v)", device.ID, introducerCfg.DeviceID)
newDeviceCfg := config.DeviceConfiguration{
DeviceID: device.ID,
Name: device.Name,
Compression: introducerCfg.Compression,
Addresses: addresses,
CertName: device.CertName,
IntroducedBy: introducerCfg.DeviceID,
}
// The introducers' introducers are also our introducers.
if device.Introducer {
l.Infof("Device %v is now also an introducer", device.ID)
newDeviceCfg.Introducer = true
newDeviceCfg.SkipIntroductionRemovals = device.SkipIntroductionRemovals
}
m.cfg.SetDevice(newDeviceCfg)
}
// Closed is called when a connection has been closed
func (m *model) Closed(conn protocol.Connection, err error) {
device := conn.ID()
m.pmut.Lock()
defer m.pmut.Unlock()
conn, ok := m.conn[device]
if !ok {
return
}
m.progressEmitter.temporaryIndexUnsubscribe(conn)
delete(m.conn, device)
delete(m.connRequestLimiters, device)
delete(m.helloMessages, device)
delete(m.deviceDownloads, device)
delete(m.remotePausedFolders, device)
closed := m.closed[device]
delete(m.closed, device)
l.Infof("Connection to %s at %s closed: %v", device, conn.Name(), err)
events.Default.Log(events.DeviceDisconnected, map[string]string{
"id": device.String(),
"error": err.Error(),
})
close(closed)
}
// closeConns will close the underlying connection for given devices
func (m *model) closeConns(devs []protocol.DeviceID, err error) {
conns := make([]connections.Connection, 0, len(devs))
m.pmut.Lock()
for _, dev := range devs {
if conn, ok := m.conn[dev]; ok {
conns = append(conns, conn)
}
}
m.pmut.Unlock()
for _, conn := range conns {
conn.Close(err)
}
}
func (m *model) closeConn(dev protocol.DeviceID, err error) {
m.closeConns([]protocol.DeviceID{dev}, err)
}
// Implements protocol.RequestResponse
type requestResponse struct {
data []byte
closed chan struct{}
once stdsync.Once
}
func newRequestResponse(size int) *requestResponse {
return &requestResponse{
data: protocol.BufferPool.Get(size),
closed: make(chan struct{}),
}
}
func (r *requestResponse) Data() []byte {
return r.data
}
func (r *requestResponse) Close() {
r.once.Do(func() {
protocol.BufferPool.Put(r.data)
close(r.closed)
})
}
func (r *requestResponse) Wait() {
<-r.closed
}
// Request returns the specified data segment by reading it from local disk.
// Implements the protocol.Model interface.
func (m *model) Request(deviceID protocol.DeviceID, folder, name string, size int32, offset int64, hash []byte, weakHash uint32, fromTemporary bool) (out protocol.RequestResponse, err error) {
if size < 0 || offset < 0 {
return nil, protocol.ErrInvalid
}
m.fmut.RLock()
folderCfg, ok := m.folderCfgs[folder]
folderIgnores := m.folderIgnores[folder]
m.fmut.RUnlock()
if !ok {
// The folder might be already unpaused in the config, but not yet
// in the model.
l.Debugf("Request from %s for file %s in unstarted folder %q", deviceID, name, folder)
return nil, protocol.ErrGeneric
}
if !folderCfg.SharedWith(deviceID) {
l.Warnf("Request from %s for file %s in unshared folder %q", deviceID, name, folder)
return nil, protocol.ErrGeneric
}
if folderCfg.Paused {
l.Debugf("Request from %s for file %s in paused folder %q", deviceID, name, folder)
return nil, protocol.ErrGeneric
}
// Make sure the path is valid and in canonical form
if name, err = fs.Canonicalize(name); err != nil {
l.Debugf("Request from %s in folder %q for invalid filename %s", deviceID, folder, name)
return nil, protocol.ErrGeneric
}
if deviceID != protocol.LocalDeviceID {
l.Debugf("%v REQ(in): %s: %q / %q o=%d s=%d t=%v", m, deviceID, folder, name, offset, size, fromTemporary)
}
if fs.IsInternal(name) {
l.Debugf("%v REQ(in) for internal file: %s: %q / %q o=%d s=%d", m, deviceID, folder, name, offset, size)
return nil, protocol.ErrInvalid
}
if folderIgnores.Match(name).IsIgnored() {
l.Debugf("%v REQ(in) for ignored file: %s: %q / %q o=%d s=%d", m, deviceID, folder, name, offset, size)
return nil, protocol.ErrInvalid
}
folderFs := folderCfg.Filesystem()
if err := osutil.TraversesSymlink(folderFs, filepath.Dir(name)); err != nil {
l.Debugf("%v REQ(in) traversal check: %s - %s: %q / %q o=%d s=%d", m, err, deviceID, folder, name, offset, size)
return nil, protocol.ErrNoSuchFile
}
// Restrict parallel requests by connection/device
m.pmut.RLock()
limiter := m.connRequestLimiters[deviceID]
m.pmut.RUnlock()
if limiter != nil {
limiter.take(int(size))
}
// The requestResponse releases the bytes to the limiter when its Close method is called.
res := newRequestResponse(int(size))
defer func() {
// Close it ourselves if it isn't returned due to an error
if err != nil {
res.Close()
}
}()
if limiter != nil {
go func() {
res.Wait()
limiter.give(int(size))
}()
}
// Only check temp files if the flag is set, and if we are set to advertise
// the temp indexes.
if fromTemporary && !folderCfg.DisableTempIndexes {
tempFn := fs.TempName(name)
if info, err := folderFs.Lstat(tempFn); err != nil || !info.IsRegular() {
// Reject reads for anything that doesn't exist or is something
// other than a regular file.
l.Debugf("%v REQ(in) failed stating temp file (%v): %s: %q / %q o=%d s=%d", m, err, deviceID, folder, name, offset, size)
return nil, protocol.ErrNoSuchFile
}
err := readOffsetIntoBuf(folderFs, tempFn, offset, res.data)
if err == nil && scanner.Validate(res.data, hash, weakHash) {
return res, nil
}
// Fall through to reading from a non-temp file, just incase the temp
// file has finished downloading.
}
if info, err := folderFs.Lstat(name); err != nil || !info.IsRegular() {
// Reject reads for anything that doesn't exist or is something
// other than a regular file.
l.Debugf("%v REQ(in) failed stating file (%v): %s: %q / %q o=%d s=%d", m, err, deviceID, folder, name, offset, size)
return nil, protocol.ErrNoSuchFile
}
if err := readOffsetIntoBuf(folderFs, name, offset, res.data); fs.IsNotExist(err) {
l.Debugf("%v REQ(in) file doesn't exist: %s: %q / %q o=%d s=%d", m, deviceID, folder, name, offset, size)
return nil, protocol.ErrNoSuchFile
} else if err != nil {
l.Debugf("%v REQ(in) failed reading file (%v): %s: %q / %q o=%d s=%d", m, err, deviceID, folder, name, offset, size)
return nil, protocol.ErrGeneric
}
if !scanner.Validate(res.data, hash, weakHash) {
m.recheckFile(deviceID, folderFs, folder, name, size, offset, hash)
l.Debugf("%v REQ(in) failed validating data (%v): %s: %q / %q o=%d s=%d", m, err, deviceID, folder, name, offset, size)
return nil, protocol.ErrNoSuchFile
}
return res, nil
}
func (m *model) recheckFile(deviceID protocol.DeviceID, folderFs fs.Filesystem, folder, name string, size int32, offset int64, hash []byte) {
cf, ok := m.CurrentFolderFile(folder, name)
if !ok {
l.Debugf("%v recheckFile: %s: %q / %q: no current file", m, deviceID, folder, name)
return
}
if cf.IsDeleted() || cf.IsInvalid() || cf.IsSymlink() || cf.IsDirectory() {
l.Debugf("%v recheckFile: %s: %q / %q: not a regular file", m, deviceID, folder, name)
return
}
blockIndex := int(offset) / cf.BlockSize()
if blockIndex >= len(cf.Blocks) {
l.Debugf("%v recheckFile: %s: %q / %q i=%d: block index too far", m, deviceID, folder, name, blockIndex)
return
}
block := cf.Blocks[blockIndex]
// Seems to want a different version of the file, whatever.
if !bytes.Equal(block.Hash, hash) {
l.Debugf("%v recheckFile: %s: %q / %q i=%d: hash mismatch %x != %x", m, deviceID, folder, name, blockIndex, block.Hash, hash)
return
}
// The hashes provided part of the request match what we expect to find according
// to what we have in the database, yet the content we've read off the filesystem doesn't
// Something is fishy, invalidate the file and rescan it.
// The file will temporarily become invalid, which is ok as the content is messed up.
m.fmut.Lock()
runner, ok := m.folderRunners[folder]
m.fmut.Unlock()
if !ok {
l.Debugf("%v recheckFile: %s: %q / %q: Folder stopped before rescan could be scheduled", m, deviceID, folder, name)
return
}
if err := runner.ForceRescan(cf); err != nil {
l.Debugf("%v recheckFile: %s: %q / %q rescan: %s", m, deviceID, folder, name, err)
return
}
l.Debugf("%v recheckFile: %s: %q / %q", m, deviceID, folder, name)
}
func (m *model) CurrentFolderFile(folder string, file string) (protocol.FileInfo, bool) {
m.fmut.RLock()
fs, ok := m.folderFiles[folder]
m.fmut.RUnlock()
if !ok {
return protocol.FileInfo{}, false
}
return fs.Get(protocol.LocalDeviceID, file)
}
func (m *model) CurrentGlobalFile(folder string, file string) (protocol.FileInfo, bool) {
m.fmut.RLock()
fs, ok := m.folderFiles[folder]
m.fmut.RUnlock()
if !ok {
return protocol.FileInfo{}, false
}
return fs.GetGlobal(file)
}
// Connection returns the current connection for device, and a boolean whether a connection was found.
func (m *model) Connection(deviceID protocol.DeviceID) (connections.Connection, bool) {
m.pmut.RLock()
cn, ok := m.conn[deviceID]
m.pmut.RUnlock()
if ok {
m.deviceWasSeen(deviceID)
}
return cn, ok
}
func (m *model) GetIgnores(folder string) ([]string, []string, error) {
m.fmut.RLock()
cfg, cfgOk := m.folderCfgs[folder]
ignores, ignoresOk := m.folderIgnores[folder]
m.fmut.RUnlock()
if !cfgOk {
cfg, cfgOk = m.cfg.Folders()[folder]
if !cfgOk {
return nil, nil, fmt.Errorf("Folder %s does not exist", folder)
}
}
// On creation a new folder with ignore patterns validly has no marker yet.
if err := cfg.CheckPath(); err != nil && err != config.ErrMarkerMissing {
return nil, nil, err
}
if !ignoresOk {
ignores = ignore.New(fs.NewFilesystem(cfg.FilesystemType, cfg.Path))
}
if err := ignores.Load(".stignore"); err != nil && !fs.IsNotExist(err) {
return nil, nil, err
}
return ignores.Lines(), ignores.Patterns(), nil
}
func (m *model) SetIgnores(folder string, content []string) error {
cfg, ok := m.cfg.Folders()[folder]
if !ok {
return fmt.Errorf("folder %s does not exist", cfg.Description())
}
err := cfg.CheckPath()
if err == config.ErrPathMissing {
if err = cfg.CreateRoot(); err != nil {
return fmt.Errorf("failed to create folder root: %v", err)
}
err = cfg.CheckPath()
}
if err != nil && err != config.ErrMarkerMissing {
return err
}
if err := ignore.WriteIgnores(cfg.Filesystem(), ".stignore", content); err != nil {
l.Warnln("Saving .stignore:", err)
return err
}
m.fmut.RLock()
runner, ok := m.folderRunners[folder]
m.fmut.RUnlock()
if ok {
return runner.Scan(nil)
}
return nil
}
// OnHello is called when an device connects to us.
// This allows us to extract some information from the Hello message
// and add it to a list of known devices ahead of any checks.
func (m *model) OnHello(remoteID protocol.DeviceID, addr net.Addr, hello protocol.HelloResult) error {
if m.cfg.IgnoredDevice(remoteID) {
return errDeviceIgnored
}
cfg, ok := m.cfg.Device(remoteID)
if !ok {
m.cfg.AddOrUpdatePendingDevice(remoteID, hello.DeviceName, addr.String())
events.Default.Log(events.DeviceRejected, map[string]string{
"name": hello.DeviceName,
"device": remoteID.String(),
"address": addr.String(),
})
return errDeviceUnknown
}
if cfg.Paused {
return errDevicePaused
}
if len(cfg.AllowedNetworks) > 0 {
if !connections.IsAllowedNetwork(addr.String(), cfg.AllowedNetworks) {
return errNetworkNotAllowed
}
}
return nil
}
// GetHello is called when we are about to connect to some remote device.
func (m *model) GetHello(id protocol.DeviceID) protocol.HelloIntf {
name := ""
if _, ok := m.cfg.Device(id); ok {
name = m.cfg.MyName()
}
return &protocol.Hello{
DeviceName: name,
ClientName: m.clientName,
ClientVersion: m.clientVersion,
}
}
// AddConnection adds a new peer connection to the model. An initial index will
// be sent to the connected peer, thereafter index updates whenever the local
// folder changes.
func (m *model) AddConnection(conn connections.Connection, hello protocol.HelloResult) {
deviceID := conn.ID()
device, ok := m.cfg.Device(deviceID)
if !ok {
l.Infoln("Trying to add connection to unknown device")
return
}
m.pmut.Lock()
if oldConn, ok := m.conn[deviceID]; ok {
l.Infoln("Replacing old connection", oldConn, "with", conn, "for", deviceID)
// There is an existing connection to this device that we are
// replacing. We must close the existing connection and wait for the
// close to complete before adding the new connection. We do the
// actual close without holding pmut as the connection will call
// back into Closed() for the cleanup.
closed := m.closed[deviceID]
m.pmut.Unlock()
oldConn.Close(errReplacingConnection)
<-closed
m.pmut.Lock()
}
m.conn[deviceID] = conn
m.closed[deviceID] = make(chan struct{})
m.deviceDownloads[deviceID] = newDeviceDownloadState()
// 0: default, <0: no limiting
switch {
case device.MaxRequestKiB > 0:
m.connRequestLimiters[deviceID] = newByteSemaphore(1024 * device.MaxRequestKiB)
case device.MaxRequestKiB == 0:
m.connRequestLimiters[deviceID] = newByteSemaphore(1024 * defaultPullerPendingKiB)
}
m.helloMessages[deviceID] = hello
event := map[string]string{
"id": deviceID.String(),
"deviceName": hello.DeviceName,
"clientName": hello.ClientName,
"clientVersion": hello.ClientVersion,
"type": conn.Type(),
}
addr := conn.RemoteAddr()
if addr != nil {
event["addr"] = addr.String()
}
events.Default.Log(events.DeviceConnected, event)
l.Infof(`Device %s client is "%s %s" named "%s" at %s`, deviceID, hello.ClientName, hello.ClientVersion, hello.DeviceName, conn)
conn.Start()
m.pmut.Unlock()
// Acquires fmut, so has to be done outside of pmut.
cm := m.generateClusterConfig(deviceID)
conn.ClusterConfig(cm)
if (device.Name == "" || m.cfg.Options().OverwriteRemoteDevNames) && hello.DeviceName != "" {
device.Name = hello.DeviceName
m.cfg.SetDevice(device)
m.cfg.Save()
}
m.deviceWasSeen(deviceID)
}
func (m *model) DownloadProgress(device protocol.DeviceID, folder string, updates []protocol.FileDownloadProgressUpdate) {
m.fmut.RLock()
cfg, ok := m.folderCfgs[folder]
m.fmut.RUnlock()
if !ok || cfg.DisableTempIndexes || !cfg.SharedWith(device) {
return
}
m.pmut.RLock()
m.deviceDownloads[device].Update(folder, updates)
state := m.deviceDownloads[device].GetBlockCounts(folder)
m.pmut.RUnlock()
events.Default.Log(events.RemoteDownloadProgress, map[string]interface{}{
"device": device.String(),
"folder": folder,
"state": state,
})
}
func (m *model) deviceStatRef(deviceID protocol.DeviceID) *stats.DeviceStatisticsReference {
m.fmut.Lock()
defer m.fmut.Unlock()
if sr, ok := m.deviceStatRefs[deviceID]; ok {
return sr
}
sr := stats.NewDeviceStatisticsReference(m.db, deviceID.String())
m.deviceStatRefs[deviceID] = sr
return sr
}
func (m *model) deviceWasSeen(deviceID protocol.DeviceID) {
m.deviceStatRef(deviceID).WasSeen()
}
type indexSender struct {
conn protocol.Connection
folder string
dev string
fset *db.FileSet
prevSequence int64
dropSymlinks bool
connClosed chan struct{}
stop chan struct{}
stopped chan struct{}
}
func (s *indexSender) Serve() {
defer close(s.stopped)
var err error
l.Debugf("Starting indexSender for %s to %s at %s (slv=%d)", s.folder, s.dev, s.conn, s.prevSequence)
defer l.Debugf("Exiting indexSender for %s to %s at %s: %v", s.folder, s.dev, s.conn, err)
// We need to send one index, regardless of whether there is something to send or not
err = s.sendIndexTo()
// Subscribe to LocalIndexUpdated (we have new information to send) and
// DeviceDisconnected (it might be us who disconnected, so we should
// exit).
sub := events.Default.Subscribe(events.LocalIndexUpdated | events.DeviceDisconnected)
defer events.Default.Unsubscribe(sub)
evChan := sub.C()
ticker := time.NewTicker(time.Minute)
defer ticker.Stop()
for err == nil {
select {
case <-s.stop:
return
case <-s.connClosed:
return
default:
}
// While we have sent a sequence at least equal to the one
// currently in the database, wait for the local index to update. The
// local index may update for other folders than the one we are
// sending for.
if s.fset.Sequence(protocol.LocalDeviceID) <= s.prevSequence {
select {
case <-s.stop:
return
case <-s.connClosed:
return
case <-evChan:
case <-ticker.C:
}
continue
}
err = s.sendIndexTo()
// Wait a short amount of time before entering the next loop. If there
// are continuous changes happening to the local index, this gives us
// time to batch them up a little.
time.Sleep(250 * time.Millisecond)
}
}
func (s *indexSender) Stop() {
close(s.stop)
<-s.stopped
}
// Complete implements the suture.IsCompletable interface. When Serve terminates
// before Stop is called, the supervisor will check for this method and if it
// returns true removes the service instead of restarting it. Here it always
// returns true, as indexSender only terminates when a connection is
// closed/has failed, in which case retrying doesn't help.
func (s *indexSender) Complete() bool { return true }
// sendIndexTo sends file infos with a sequence number higher than prevSequence and
// returns the highest sent sequence number.
func (s *indexSender) sendIndexTo() error {
initial := s.prevSequence == 0
batch := newFileInfoBatch(nil)
batch.flushFn = func(fs []protocol.FileInfo) error {
l.Debugf("Sending indexes for %s to %s at %s: %d files (<%d bytes)", s.folder, s.dev, s.conn, len(batch.infos), batch.size)
if initial {
initial = false
return s.conn.Index(s.folder, fs)
}
return s.conn.IndexUpdate(s.folder, fs)
}
var err error
var f protocol.FileInfo
s.fset.WithHaveSequence(s.prevSequence+1, func(fi db.FileIntf) bool {
if err = batch.flushIfFull(); err != nil {
return false
}
if shouldDebug() {
if fi.SequenceNo() < s.prevSequence+1 {
panic(fmt.Sprintln("sequence lower than requested, got:", fi.SequenceNo(), ", asked to start at:", s.prevSequence+1))
}
if f.Sequence > 0 && fi.SequenceNo() <= f.Sequence {
panic(fmt.Sprintln("non-increasing sequence, current:", fi.SequenceNo(), "<= previous:", f.Sequence))
}
}
f = fi.(protocol.FileInfo)
// Mark the file as invalid if any of the local bad stuff flags are set.
f.RawInvalid = f.IsInvalid()
// If the file is marked LocalReceive (i.e., changed locally on a
// receive only folder) we do not want it to ever become the
// globally best version, invalid or not.
if f.IsReceiveOnlyChanged() {
f.Version = protocol.Vector{}
}
f.LocalFlags = 0 // never sent externally
if s.dropSymlinks && f.IsSymlink() {
// Do not send index entries with symlinks to clients that can't
// handle it. Fixes issue #3802. Once both sides are upgraded, a
// rescan (i.e., change) of the symlink is required for it to
// sync again, due to delta indexes.
return true
}
batch.append(f)
return true
})
if err != nil {
return err
}
err = batch.flush()
// True if there was nothing to be sent
if f.Sequence == 0 {
return err
}
s.prevSequence = f.Sequence
return err
}
func (m *model) requestGlobal(deviceID protocol.DeviceID, folder, name string, offset int64, size int, hash []byte, weakHash uint32, fromTemporary bool) ([]byte, error) {
m.pmut.RLock()
nc, ok := m.conn[deviceID]
m.pmut.RUnlock()
if !ok {
return nil, fmt.Errorf("requestGlobal: no such device: %s", deviceID)
}
l.Debugf("%v REQ(out): %s: %q / %q o=%d s=%d h=%x wh=%x ft=%t", m, deviceID, folder, name, offset, size, hash, weakHash, fromTemporary)
return nc.Request(folder, name, offset, size, hash, weakHash, fromTemporary)
}
func (m *model) ScanFolders() map[string]error {
m.fmut.RLock()
folders := make([]string, 0, len(m.folderCfgs))
for folder := range m.folderCfgs {
folders = append(folders, folder)
}
m.fmut.RUnlock()
errors := make(map[string]error, len(m.folderCfgs))
errorsMut := sync.NewMutex()
wg := sync.NewWaitGroup()
wg.Add(len(folders))
for _, folder := range folders {
folder := folder
go func() {
err := m.ScanFolder(folder)
if err != nil {
errorsMut.Lock()
errors[folder] = err
errorsMut.Unlock()
}
wg.Done()
}()
}
wg.Wait()
return errors
}
func (m *model) ScanFolder(folder string) error {
return m.ScanFolderSubdirs(folder, nil)
}
func (m *model) ScanFolderSubdirs(folder string, subs []string) error {
m.fmut.RLock()
err := m.checkFolderRunningLocked(folder)
runner := m.folderRunners[folder]
m.fmut.RUnlock()
if err != nil {
return err
}
return runner.Scan(subs)
}
func (m *model) DelayScan(folder string, next time.Duration) {
m.fmut.Lock()
runner, ok := m.folderRunners[folder]
m.fmut.Unlock()
if !ok {
return
}
runner.DelayScan(next)
}
// numHashers returns the number of hasher routines to use for a given folder,
// taking into account configuration and available CPU cores.
func (m *model) numHashers(folder string) int {
m.fmut.Lock()
folderCfg := m.folderCfgs[folder]
numFolders := len(m.folderCfgs)
m.fmut.Unlock()
if folderCfg.Hashers > 0 {
// Specific value set in the config, use that.
return folderCfg.Hashers
}
if runtime.GOOS == "windows" || runtime.GOOS == "darwin" {
// Interactive operating systems; don't load the system too heavily by
// default.
return 1
}
// For other operating systems and architectures, lets try to get some
// work done... Divide the available CPU cores among the configured
// folders.
if perFolder := runtime.GOMAXPROCS(-1) / numFolders; perFolder > 0 {
return perFolder
}
return 1
}
// generateClusterConfig returns a ClusterConfigMessage that is correct for
// the given peer device
func (m *model) generateClusterConfig(device protocol.DeviceID) protocol.ClusterConfig {
var message protocol.ClusterConfig
m.fmut.RLock()
defer m.fmut.RUnlock()
for _, folderCfg := range m.cfg.FolderList() {
if !folderCfg.SharedWith(device) {
continue
}
protocolFolder := protocol.Folder{
ID: folderCfg.ID,
Label: folderCfg.Label,
ReadOnly: folderCfg.Type == config.FolderTypeSendOnly,
IgnorePermissions: folderCfg.IgnorePerms,
IgnoreDelete: folderCfg.IgnoreDelete,
DisableTempIndexes: folderCfg.DisableTempIndexes,
Paused: folderCfg.Paused,
}
var fs *db.FileSet
if !folderCfg.Paused {
fs = m.folderFiles[folderCfg.ID]
}
for _, device := range folderCfg.Devices {
deviceCfg, _ := m.cfg.Device(device.DeviceID)
protocolDevice := protocol.Device{
ID: deviceCfg.DeviceID,
Name: deviceCfg.Name,
Addresses: deviceCfg.Addresses,
Compression: deviceCfg.Compression,
CertName: deviceCfg.CertName,
Introducer: deviceCfg.Introducer,
}
if fs != nil {
if deviceCfg.DeviceID == m.id {
protocolDevice.IndexID = fs.IndexID(protocol.LocalDeviceID)
protocolDevice.MaxSequence = fs.Sequence(protocol.LocalDeviceID)
} else {
protocolDevice.IndexID = fs.IndexID(deviceCfg.DeviceID)
protocolDevice.MaxSequence = fs.Sequence(deviceCfg.DeviceID)
}
}
protocolFolder.Devices = append(protocolFolder.Devices, protocolDevice)
}
message.Folders = append(message.Folders, protocolFolder)
}
return message
}
func (m *model) State(folder string) (string, time.Time, error) {
m.fmut.RLock()
runner, ok := m.folderRunners[folder]
m.fmut.RUnlock()
if !ok {
// The returned error should be an actual folder error, so returning
// errors.New("does not exist") or similar here would be
// inappropriate.
return "", time.Time{}, nil
}
state, changed, err := runner.getState()
return state.String(), changed, err
}
func (m *model) FolderErrors(folder string) ([]FileError, error) {
m.fmut.RLock()
defer m.fmut.RUnlock()
if err := m.checkFolderRunningLocked(folder); err != nil {
return nil, err
}
return m.folderRunners[folder].Errors(), nil
}
func (m *model) WatchError(folder string) error {
m.fmut.RLock()
defer m.fmut.RUnlock()
if err := m.checkFolderRunningLocked(folder); err != nil {
return err
}
return m.folderRunners[folder].WatchError()
}
func (m *model) Override(folder string) {
// Grab the runner and the file set.
m.fmut.RLock()
runner, ok := m.folderRunners[folder]
m.fmut.RUnlock()
if !ok {
return
}
// Run the override, taking updates as if they came from scanning.
runner.Override()
}
func (m *model) Revert(folder string) {
// Grab the runner and the file set.
m.fmut.RLock()
runner, ok := m.folderRunners[folder]
m.fmut.RUnlock()
if !ok {
return
}
// Run the revert, taking updates as if they came from scanning.
runner.Revert()
}
// CurrentSequence returns the change version for the given folder.
// This is guaranteed to increment if the contents of the local folder has
// changed.
func (m *model) CurrentSequence(folder string) (int64, bool) {
m.fmut.RLock()
fs, ok := m.folderFiles[folder]
m.fmut.RUnlock()
if !ok {
// The folder might not exist, since this can be called with a user
// specified folder name from the REST interface.
return 0, false
}
return fs.Sequence(protocol.LocalDeviceID), true
}
// RemoteSequence returns the change version for the given folder, as
// sent by remote peers. This is guaranteed to increment if the contents of
// the remote or global folder has changed.
func (m *model) RemoteSequence(folder string) (int64, bool) {
m.fmut.RLock()
fs, ok := m.folderFiles[folder]
cfg := m.folderCfgs[folder]
m.fmut.RUnlock()
if !ok {
// The folder might not exist, since this can be called with a user
// specified folder name from the REST interface.
return 0, false
}
var ver int64
for _, device := range cfg.Devices {
ver += fs.Sequence(device.DeviceID)
}
return ver, true
}
func (m *model) GlobalDirectoryTree(folder, prefix string, levels int, dirsonly bool) map[string]interface{} {
m.fmut.RLock()
files, ok := m.folderFiles[folder]
m.fmut.RUnlock()
if !ok {
return nil
}
output := make(map[string]interface{})
sep := string(filepath.Separator)
prefix = osutil.NativeFilename(prefix)
if prefix != "" && !strings.HasSuffix(prefix, sep) {
prefix = prefix + sep
}
files.WithPrefixedGlobalTruncated(prefix, func(fi db.FileIntf) bool {
f := fi.(db.FileInfoTruncated)
// Don't include the prefix itself.
if f.IsInvalid() || f.IsDeleted() || strings.HasPrefix(prefix, f.Name) {
return true
}
f.Name = strings.Replace(f.Name, prefix, "", 1)
var dir, base string
if f.IsDirectory() && !f.IsSymlink() {
dir = f.Name
} else {
dir = filepath.Dir(f.Name)
base = filepath.Base(f.Name)
}
if levels > -1 && strings.Count(f.Name, sep) > levels {
return true
}
last := output
if dir != "." {
for _, path := range strings.Split(dir, sep) {
directory, ok := last[path]
if !ok {
newdir := make(map[string]interface{})
last[path] = newdir
last = newdir
} else {
last = directory.(map[string]interface{})
}
}
}
if !dirsonly && base != "" {
last[base] = []interface{}{
f.ModTime(), f.FileSize(),
}
}
return true
})
return output
}
func (m *model) GetFolderVersions(folder string) (map[string][]versioner.FileVersion, error) {
fcfg, ok := m.cfg.Folder(folder)
if !ok {
return nil, errFolderMissing
}
ver := fcfg.Versioner()
if ver == nil {
return nil, errors.New("no versioner configured")
}
return ver.GetVersions()
}
func (m *model) RestoreFolderVersions(folder string, versions map[string]time.Time) (map[string]string, error) {
fcfg, ok := m.cfg.Folder(folder)
if !ok {
return nil, errFolderMissing
}
ver := fcfg.Versioner()
restoreErrors := make(map[string]string)
for file, version := range versions {
if err := ver.Restore(file, version); err != nil {
restoreErrors[file] = err.Error()
}
}
// Trigger scan
if !fcfg.FSWatcherEnabled {
go func() { _ = m.ScanFolder(folder) }()
}
return restoreErrors, nil
}
func (m *model) Availability(folder string, file protocol.FileInfo, block protocol.BlockInfo) []Availability {
// The slightly unusual locking sequence here is because we need to hold
// pmut for the duration (as the value returned from foldersFiles can
// get heavily modified on Close()), but also must acquire fmut before
// pmut. (The locks can be *released* in any order.)
m.fmut.RLock()
m.pmut.RLock()
defer m.pmut.RUnlock()
fs, ok := m.folderFiles[folder]
cfg := m.folderCfgs[folder]
m.fmut.RUnlock()
if !ok {
return nil
}
var availabilities []Availability
next:
for _, device := range fs.Availability(file.Name) {
for _, pausedFolder := range m.remotePausedFolders[device] {
if pausedFolder == folder {
continue next
}
}
_, ok := m.conn[device]
if ok {
availabilities = append(availabilities, Availability{ID: device, FromTemporary: false})
}
}
for _, device := range cfg.Devices {
if m.deviceDownloads[device.DeviceID].Has(folder, file.Name, file.Version, int32(block.Offset/int64(file.BlockSize()))) {
availabilities = append(availabilities, Availability{ID: device.DeviceID, FromTemporary: true})
}
}
return availabilities
}
// BringToFront bumps the given files priority in the job queue.
func (m *model) BringToFront(folder, file string) {
m.fmut.RLock()
runner, ok := m.folderRunners[folder]
m.fmut.RUnlock()
if ok {
runner.BringToFront(file)
}
}
func (m *model) ResetFolder(folder string) {
l.Infof("Cleaning data for folder %q", folder)
db.DropFolder(m.db, folder)
}
func (m *model) String() string {
return fmt.Sprintf("model@%p", m)
}
func (m *model) VerifyConfiguration(from, to config.Configuration) error {
return nil
}
func (m *model) CommitConfiguration(from, to config.Configuration) bool {
// TODO: This should not use reflect, and should take more care to try to handle stuff without restart.
// Go through the folder configs and figure out if we need to restart or not.
fromFolders := mapFolders(from.Folders)
toFolders := mapFolders(to.Folders)
for folderID, cfg := range toFolders {
if _, ok := fromFolders[folderID]; !ok {
// A folder was added.
if cfg.Paused {
l.Infoln("Paused folder", cfg.Description())
} else {
l.Infoln("Adding folder", cfg.Description())
m.AddFolder(cfg)
m.StartFolder(folderID)
}
}
}
for folderID, fromCfg := range fromFolders {
toCfg, ok := toFolders[folderID]
if !ok {
// The folder was removed.
m.RemoveFolder(fromCfg)
continue
}
if fromCfg.Paused && toCfg.Paused {
continue
}
// This folder exists on both sides. Settings might have changed.
// Check if anything differs that requires a restart.
if !reflect.DeepEqual(fromCfg.RequiresRestartOnly(), toCfg.RequiresRestartOnly()) {
m.RestartFolder(fromCfg, toCfg)
}
// Emit the folder pause/resume event
if fromCfg.Paused != toCfg.Paused {
eventType := events.FolderResumed
if toCfg.Paused {
eventType = events.FolderPaused
}
events.Default.Log(eventType, map[string]string{"id": toCfg.ID, "label": toCfg.Label})
}
}
// Removing a device. We actually don't need to do anything.
// Because folder config has changed (since the device lists do not match)
// Folders for that had device got "restarted", which involves killing
// connections to all devices that we were sharing the folder with.
// At some point model.Close() will get called for that device which will
// clean residue device state that is not part of any folder.
// Pausing a device, unpausing is handled by the connection service.
fromDevices := from.DeviceMap()
toDevices := to.DeviceMap()
for deviceID, toCfg := range toDevices {
fromCfg, ok := fromDevices[deviceID]
if !ok || fromCfg.Paused == toCfg.Paused {
continue
}
// Ignored folder was removed, reconnect to retrigger the prompt.
if len(fromCfg.IgnoredFolders) > len(toCfg.IgnoredFolders) {
m.closeConn(deviceID, errIgnoredFolderRemoved)
}
if toCfg.Paused {
l.Infoln("Pausing", deviceID)
m.closeConn(deviceID, errDevicePaused)
events.Default.Log(events.DevicePaused, map[string]string{"device": deviceID.String()})
} else {
events.Default.Log(events.DeviceResumed, map[string]string{"device": deviceID.String()})
}
}
scanLimiter.setCapacity(to.Options.MaxConcurrentScans)
// Some options don't require restart as those components handle it fine
// by themselves. Compare the options structs containing only the
// attributes that require restart and act apprioriately.
if !reflect.DeepEqual(from.Options.RequiresRestartOnly(), to.Options.RequiresRestartOnly()) {
l.Debugln(m, "requires restart, options differ")
return false
}
return true
}
// checkFolderRunningLocked returns nil if the folder is up and running and a
// descriptive error if not.
// Need to hold (read) lock on m.fmut when calling this.
func (m *model) checkFolderRunningLocked(folder string) error {
_, ok := m.folderRunners[folder]
if ok {
return nil
}
if cfg, ok := m.cfg.Folder(folder); !ok {
return errFolderMissing
} else if cfg.Paused {
return ErrFolderPaused
}
return errFolderNotRunning
}
// checkFolderDeviceStatusLocked first checks the folder and then whether the
// given device is connected and shares this folder.
// Need to hold (read) lock on both m.fmut and m.pmut when calling this.
func (m *model) checkDeviceFolderConnectedLocked(device protocol.DeviceID, folder string) error {
if err := m.checkFolderRunningLocked(folder); err != nil {
return err
}
if cfg, ok := m.cfg.Device(device); !ok {
return errDeviceUnknown
} else if cfg.Paused {
return errDevicePaused
}
if _, ok := m.conn[device]; !ok {
return errors.New("device is not connected")
}
if cfg, ok := m.cfg.Folder(folder); !ok || !cfg.SharedWith(device) {
return errors.New("folder is not shared with device")
}
return nil
}
// mapFolders returns a map of folder ID to folder configuration for the given
// slice of folder configurations.
func mapFolders(folders []config.FolderConfiguration) map[string]config.FolderConfiguration {
m := make(map[string]config.FolderConfiguration, len(folders))
for _, cfg := range folders {
m[cfg.ID] = cfg
}
return m
}
// mapDevices returns a map of device ID to nothing for the given slice of
// device IDs.
func mapDevices(devices []protocol.DeviceID) map[protocol.DeviceID]struct{} {
m := make(map[protocol.DeviceID]struct{}, len(devices))
for _, dev := range devices {
m[dev] = struct{}{}
}
return m
}
// Skips `skip` elements and retrieves up to `get` elements from a given slice.
// Returns the resulting slice, plus how much elements are left to skip or
// copy to satisfy the values which were provided, given the slice is not
// big enough.
func getChunk(data []string, skip, get int) ([]string, int, int) {
l := len(data)
if l <= skip {
return []string{}, skip - l, get
} else if l < skip+get {
return data[skip:l], 0, get - (l - skip)
}
return data[skip : skip+get], 0, 0
}
func readOffsetIntoBuf(fs fs.Filesystem, file string, offset int64, buf []byte) error {
fd, err := fs.Open(file)
if err != nil {
l.Debugln("readOffsetIntoBuf.Open", file, err)
return err
}
defer fd.Close()
_, err = fd.ReadAt(buf, offset)
if err != nil {
l.Debugln("readOffsetIntoBuf.ReadAt", file, err)
}
return err
}
// makeForgetUpdate takes an index update and constructs a download progress update
// causing to forget any progress for files which we've just been sent.
func makeForgetUpdate(files []protocol.FileInfo) []protocol.FileDownloadProgressUpdate {
updates := make([]protocol.FileDownloadProgressUpdate, 0, len(files))
for _, file := range files {
if file.IsSymlink() || file.IsDirectory() || file.IsDeleted() {
continue
}
updates = append(updates, protocol.FileDownloadProgressUpdate{
Name: file.Name,
Version: file.Version,
UpdateType: protocol.UpdateTypeForget,
})
}
return updates
}
// folderDeviceSet is a set of (folder, deviceID) pairs
type folderDeviceSet map[string]map[protocol.DeviceID]struct{}
// set adds the (dev, folder) pair to the set
func (s folderDeviceSet) set(dev protocol.DeviceID, folder string) {
devs, ok := s[folder]
if !ok {
devs = make(map[protocol.DeviceID]struct{})
s[folder] = devs
}
devs[dev] = struct{}{}
}
// has returns true if the (dev, folder) pair is in the set
func (s folderDeviceSet) has(dev protocol.DeviceID, folder string) bool {
_, ok := s[folder][dev]
return ok
}
// hasDevice returns true if the device is set on any folder
func (s folderDeviceSet) hasDevice(dev protocol.DeviceID) bool {
for _, devices := range s {
if _, ok := devices[dev]; ok {
return true
}
}
return false
}
type fileInfoBatch struct {
infos []protocol.FileInfo
size int
flushFn func([]protocol.FileInfo) error
}
func newFileInfoBatch(fn func([]protocol.FileInfo) error) *fileInfoBatch {
return &fileInfoBatch{
infos: make([]protocol.FileInfo, 0, maxBatchSizeFiles),
flushFn: fn,
}
}
func (b *fileInfoBatch) append(f protocol.FileInfo) {
b.infos = append(b.infos, f)
b.size += f.ProtoSize()
}
func (b *fileInfoBatch) flushIfFull() error {
if len(b.infos) >= maxBatchSizeFiles || b.size >= maxBatchSizeBytes {
return b.flush()
}
return nil
}
func (b *fileInfoBatch) flush() error {
if len(b.infos) == 0 {
return nil
}
if err := b.flushFn(b.infos); err != nil {
return err
}
b.reset()
return nil
}
func (b *fileInfoBatch) reset() {
b.infos = b.infos[:0]
b.size = 0
}
// syncMutexMap is a type safe wrapper for a sync.Map that holds mutexes
type syncMutexMap struct {
inner stdsync.Map
}
func (m *syncMutexMap) Get(key string) sync.Mutex {
v, _ := m.inner.LoadOrStore(key, sync.NewMutex())
return v.(sync.Mutex)
}
// sanitizePath takes a string that might contain all kinds of special
// characters and makes a valid, similar, path name out of it.
//
// Spans of invalid characters are replaced by a single space. Invalid
// characters are control characters, the things not allowed in file names
// in Windows, and common shell metacharacters. Even if asterisks and pipes
// and stuff are allowed on Unixes in general they might not be allowed by
// the filesystem and may surprise the user and cause shell oddness. This
// function is intended for file names we generate on behalf of the user,
// and surprising them with odd shell characters in file names is unkind.
//
// We include whitespace in the invalid characters so that multiple
// whitespace is collapsed to a single space. Additionally, whitespace at
// either end is removed.
func sanitizePath(path string) string {
invalid := regexp.MustCompile(`([[:cntrl:]]|[<>:"'/\\|?*\n\r\t \[\]\{\};:!@$%&^#])+`)
return strings.TrimSpace(invalid.ReplaceAllString(path, " "))
}
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