mirror of
https://github.com/octoleo/syncthing.git
synced 2024-12-23 03:18:59 +00:00
lib/db: Consistent use of buffers (#5470)
This commit is contained in:
parent
df4d754197
commit
00fa77dd47
@ -34,7 +34,7 @@ func (db *instance) updateFiles(folder, device []byte, fs []protocol.FileInfo, m
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t := db.newReadWriteTransaction()
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t := db.newReadWriteTransaction()
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defer t.close()
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defer t.close()
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var dk, gk []byte
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var dk, gk, keyBuf []byte
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devID := protocol.DeviceIDFromBytes(device)
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devID := protocol.DeviceIDFromBytes(device)
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for _, f := range fs {
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for _, f := range fs {
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name := []byte(f.Name)
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name := []byte(f.Name)
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@ -53,7 +53,7 @@ func (db *instance) updateFiles(folder, device []byte, fs []protocol.FileInfo, m
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t.insertFile(dk, folder, device, f)
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t.insertFile(dk, folder, device, f)
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gk = db.keyer.GenerateGlobalVersionKey(gk, folder, name)
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gk = db.keyer.GenerateGlobalVersionKey(gk, folder, name)
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t.updateGlobal(gk, folder, device, f, meta)
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keyBuf, _ = t.updateGlobal(gk, keyBuf, folder, device, f, meta)
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// Write out and reuse the batch every few records, to avoid the batch
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// Write out and reuse the batch every few records, to avoid the batch
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// growing too large and thus allocating unnecessarily much memory.
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// growing too large and thus allocating unnecessarily much memory.
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@ -156,7 +156,7 @@ func (db *instance) withAllFolderTruncated(folder []byte, fn func(device []byte,
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dbi := t.NewIterator(util.BytesPrefix(db.keyer.GenerateDeviceFileKey(nil, folder, nil, nil).WithoutNameAndDevice()), nil)
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dbi := t.NewIterator(util.BytesPrefix(db.keyer.GenerateDeviceFileKey(nil, folder, nil, nil).WithoutNameAndDevice()), nil)
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defer dbi.Release()
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defer dbi.Release()
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var gk []byte
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var gk, buf []byte
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for dbi.Next() {
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for dbi.Next() {
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device, ok := db.keyer.DeviceFromDeviceFileKey(dbi.Key())
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device, ok := db.keyer.DeviceFromDeviceFileKey(dbi.Key())
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if !ok {
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if !ok {
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@ -181,7 +181,7 @@ func (db *instance) withAllFolderTruncated(folder []byte, fn func(device []byte,
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l.Infof("Dropping invalid filename %q from database", f.Name)
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l.Infof("Dropping invalid filename %q from database", f.Name)
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name := []byte(f.Name)
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name := []byte(f.Name)
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gk = db.keyer.GenerateGlobalVersionKey(gk, folder, name)
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gk = db.keyer.GenerateGlobalVersionKey(gk, folder, name)
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t.removeFromGlobal(gk, folder, device, name, nil)
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buf = t.removeFromGlobal(gk, buf, folder, device, name, nil)
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t.Delete(dbi.Key())
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t.Delete(dbi.Key())
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t.checkFlush()
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t.checkFlush()
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continue
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continue
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@ -202,8 +202,7 @@ func (db *instance) getFileDirty(folder, device, file []byte) (protocol.FileInfo
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func (db *instance) getGlobalDirty(folder, file []byte, truncate bool) (FileIntf, bool) {
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func (db *instance) getGlobalDirty(folder, file []byte, truncate bool) (FileIntf, bool) {
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t := db.newReadOnlyTransaction()
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t := db.newReadOnlyTransaction()
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defer t.close()
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defer t.close()
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_, f, ok := t.getGlobal(nil, folder, file, truncate)
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_, _, f, ok := t.getGlobalInto(nil, nil, folder, file, truncate)
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return f, ok
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return f, ok
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}
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}
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@ -219,7 +218,7 @@ func (db *instance) withGlobal(folder, prefix []byte, truncate bool, fn Iterator
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prefix = append(prefix, '/')
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prefix = append(prefix, '/')
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}
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}
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if _, _, f, ok := t.getGlobalInto(nil, nil, folder, unslashedPrefix, truncate); ok && !fn(f) {
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if _, f, ok := t.getGlobal(nil, folder, unslashedPrefix, truncate); ok && !fn(f) {
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return
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return
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}
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}
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}
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}
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@ -363,11 +362,11 @@ func (db *instance) withNeedLocal(folder []byte, truncate bool, fn Iterator) {
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dbi := t.NewIterator(util.BytesPrefix(db.keyer.GenerateNeedFileKey(nil, folder, nil).WithoutName()), nil)
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dbi := t.NewIterator(util.BytesPrefix(db.keyer.GenerateNeedFileKey(nil, folder, nil).WithoutName()), nil)
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defer dbi.Release()
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defer dbi.Release()
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var gk, dk []byte
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var buf []byte
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var f FileIntf
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var f FileIntf
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var ok bool
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var ok bool
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for dbi.Next() {
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for dbi.Next() {
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gk, dk, f, ok = t.getGlobalInto(gk, dk, folder, db.keyer.NameFromGlobalVersionKey(dbi.Key()), truncate)
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buf, f, ok = t.getGlobal(buf, folder, db.keyer.NameFromGlobalVersionKey(dbi.Key()), truncate)
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if !ok {
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if !ok {
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continue
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continue
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}
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}
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@ -402,13 +401,12 @@ func (db *instance) dropDeviceFolder(device, folder []byte, meta *metadataTracke
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dbi := t.NewIterator(util.BytesPrefix(db.keyer.GenerateDeviceFileKey(nil, folder, device, nil)), nil)
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dbi := t.NewIterator(util.BytesPrefix(db.keyer.GenerateDeviceFileKey(nil, folder, device, nil)), nil)
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defer dbi.Release()
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defer dbi.Release()
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var gk []byte
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var gk, buf []byte
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for dbi.Next() {
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for dbi.Next() {
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key := dbi.Key()
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name := db.keyer.NameFromDeviceFileKey(dbi.Key())
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name := db.keyer.NameFromDeviceFileKey(key)
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gk = db.keyer.GenerateGlobalVersionKey(gk, folder, name)
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gk = db.keyer.GenerateGlobalVersionKey(gk, folder, name)
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t.removeFromGlobal(gk, folder, device, name, meta)
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buf = t.removeFromGlobal(gk, buf, folder, device, name, meta)
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t.Delete(key)
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t.Delete(dbi.Key())
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t.checkFlush()
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t.checkFlush()
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}
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}
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}
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}
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@ -101,7 +101,7 @@ func (db *schemaUpdater) updateSchema0to1() {
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changedFolders := make(map[string]struct{})
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changedFolders := make(map[string]struct{})
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ignAdded := 0
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ignAdded := 0
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meta := newMetadataTracker() // dummy metadata tracker
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meta := newMetadataTracker() // dummy metadata tracker
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var gk []byte
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var gk, buf []byte
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for dbi.Next() {
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for dbi.Next() {
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folder, ok := db.keyer.FolderFromDeviceFileKey(dbi.Key())
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folder, ok := db.keyer.FolderFromDeviceFileKey(dbi.Key())
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@ -126,7 +126,7 @@ func (db *schemaUpdater) updateSchema0to1() {
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changedFolders[string(folder)] = struct{}{}
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changedFolders[string(folder)] = struct{}{}
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}
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}
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gk = db.keyer.GenerateGlobalVersionKey(gk, folder, name)
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gk = db.keyer.GenerateGlobalVersionKey(gk, folder, name)
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t.removeFromGlobal(gk, folder, device, nil, nil)
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buf = t.removeFromGlobal(gk, buf, folder, device, nil, nil)
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t.Delete(dbi.Key())
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t.Delete(dbi.Key())
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t.checkFlush()
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t.checkFlush()
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continue
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continue
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@ -156,8 +156,8 @@ func (db *schemaUpdater) updateSchema0to1() {
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// Add invalid files to global list
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// Add invalid files to global list
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if f.IsInvalid() {
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if f.IsInvalid() {
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gk = db.keyer.GenerateGlobalVersionKey(gk, folder, name)
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gk = db.keyer.GenerateGlobalVersionKey(gk, folder, name)
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if t.updateGlobal(gk, folder, device, f, meta) {
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if buf, ok = t.updateGlobal(gk, buf, folder, device, f, meta); ok {
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if _, ok := changedFolders[string(folder)]; !ok {
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if _, ok = changedFolders[string(folder)]; !ok {
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changedFolders[string(folder)] = struct{}{}
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changedFolders[string(folder)] = struct{}{}
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}
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}
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ignAdded++
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ignAdded++
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@ -56,7 +56,6 @@ func (t readOnlyTransaction) getFileTrunc(key []byte, trunc bool) (FileIntf, boo
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l.Debugln("surprise error:", err)
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l.Debugln("surprise error:", err)
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return nil, false
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return nil, false
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}
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}
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f, err := unmarshalTrunc(bs, trunc)
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f, err := unmarshalTrunc(bs, trunc)
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if err != nil {
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if err != nil {
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l.Debugln("unmarshal error:", err)
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l.Debugln("unmarshal error:", err)
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@ -65,25 +64,25 @@ func (t readOnlyTransaction) getFileTrunc(key []byte, trunc bool) (FileIntf, boo
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return f, true
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return f, true
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}
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}
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func (t readOnlyTransaction) getGlobalInto(gk, dk, folder, file []byte, truncate bool) ([]byte, []byte, FileIntf, bool) {
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func (t readOnlyTransaction) getGlobal(keyBuf, folder, file []byte, truncate bool) ([]byte, FileIntf, bool) {
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gk = t.db.keyer.GenerateGlobalVersionKey(gk, folder, file)
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keyBuf = t.db.keyer.GenerateGlobalVersionKey(keyBuf, folder, file)
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bs, err := t.Get(gk, nil)
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bs, err := t.Get(keyBuf, nil)
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if err != nil {
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if err != nil {
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return gk, dk, nil, false
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return keyBuf, nil, false
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}
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}
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vl, ok := unmarshalVersionList(bs)
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vl, ok := unmarshalVersionList(bs)
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if !ok {
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if !ok {
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return gk, dk, nil, false
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return keyBuf, nil, false
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}
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}
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dk = t.db.keyer.GenerateDeviceFileKey(dk, folder, vl.Versions[0].Device, file)
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keyBuf = t.db.keyer.GenerateDeviceFileKey(keyBuf, folder, vl.Versions[0].Device, file)
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if fi, ok := t.getFileTrunc(dk, truncate); ok {
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if fi, ok := t.getFileTrunc(keyBuf, truncate); ok {
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return gk, dk, fi, true
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return keyBuf, fi, true
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}
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}
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return gk, dk, nil, false
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return keyBuf, nil, false
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}
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}
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// A readWriteTransaction is a readOnlyTransaction plus a batch for writes.
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// A readWriteTransaction is a readOnlyTransaction plus a batch for writes.
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@ -129,7 +128,7 @@ func (t readWriteTransaction) insertFile(fk, folder, device []byte, file protoco
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// updateGlobal adds this device+version to the version list for the given
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// updateGlobal adds this device+version to the version list for the given
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// file. If the device is already present in the list, the version is updated.
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// file. If the device is already present in the list, the version is updated.
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// If the file does not have an entry in the global list, it is created.
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// If the file does not have an entry in the global list, it is created.
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func (t readWriteTransaction) updateGlobal(gk, folder, device []byte, file protocol.FileInfo, meta *metadataTracker) bool {
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func (t readWriteTransaction) updateGlobal(gk, keyBuf, folder, device []byte, file protocol.FileInfo, meta *metadataTracker) ([]byte, bool) {
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l.Debugf("update global; folder=%q device=%v file=%q version=%v invalid=%v", folder, protocol.DeviceIDFromBytes(device), file.Name, file.Version, file.IsInvalid())
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l.Debugf("update global; folder=%q device=%v file=%q version=%v invalid=%v", folder, protocol.DeviceIDFromBytes(device), file.Name, file.Version, file.IsInvalid())
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var fl VersionList
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var fl VersionList
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@ -139,7 +138,7 @@ func (t readWriteTransaction) updateGlobal(gk, folder, device []byte, file proto
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fl, removedFV, removedAt, insertedAt := fl.update(folder, device, file, t.readOnlyTransaction)
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fl, removedFV, removedAt, insertedAt := fl.update(folder, device, file, t.readOnlyTransaction)
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if insertedAt == -1 {
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if insertedAt == -1 {
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l.Debugln("update global; same version, global unchanged")
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l.Debugln("update global; same version, global unchanged")
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return false
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return keyBuf, false
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}
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}
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name := []byte(file.Name)
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name := []byte(file.Name)
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@ -148,19 +147,22 @@ func (t readWriteTransaction) updateGlobal(gk, folder, device []byte, file proto
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if insertedAt == 0 {
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if insertedAt == 0 {
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// Inserted a new newest version
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// Inserted a new newest version
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global = file
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global = file
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} else if new, ok := t.getFile(folder, fl.Versions[0].Device, name); ok {
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} else {
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keyBuf = t.db.keyer.GenerateDeviceFileKey(keyBuf, folder, fl.Versions[0].Device, name)
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if new, ok := t.getFileByKey(keyBuf); ok {
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global = new
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global = new
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} else {
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} else {
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panic("This file must exist in the db")
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panic("This file must exist in the db")
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}
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}
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}
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// Fixup the list of files we need.
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// Fixup the list of files we need.
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t.updateLocalNeed(folder, name, fl, global)
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keyBuf = t.updateLocalNeed(keyBuf, folder, name, fl, global)
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if removedAt != 0 && insertedAt != 0 {
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if removedAt != 0 && insertedAt != 0 {
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l.Debugf(`new global for "%v" after update: %v`, file.Name, fl)
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l.Debugf(`new global for "%v" after update: %v`, file.Name, fl)
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t.Put(gk, mustMarshal(&fl))
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t.Put(gk, mustMarshal(&fl))
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return true
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return keyBuf, true
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}
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}
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// Remove the old global from the global size counter
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// Remove the old global from the global size counter
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@ -171,7 +173,8 @@ func (t readWriteTransaction) updateGlobal(gk, folder, device []byte, file proto
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// The previous newest version is now at index 1
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// The previous newest version is now at index 1
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oldGlobalFV = fl.Versions[1]
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oldGlobalFV = fl.Versions[1]
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}
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}
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if oldFile, ok := t.getFile(folder, oldGlobalFV.Device, name); ok {
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keyBuf = t.db.keyer.GenerateDeviceFileKey(keyBuf, folder, oldGlobalFV.Device, name)
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if oldFile, ok := t.getFileByKey(keyBuf); ok {
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// A failure to get the file here is surprising and our
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// A failure to get the file here is surprising and our
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// global size data will be incorrect until a restart...
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// global size data will be incorrect until a restart...
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meta.removeFile(protocol.GlobalDeviceID, oldFile)
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meta.removeFile(protocol.GlobalDeviceID, oldFile)
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@ -183,24 +186,25 @@ func (t readWriteTransaction) updateGlobal(gk, folder, device []byte, file proto
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l.Debugf(`new global for "%v" after update: %v`, file.Name, fl)
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l.Debugf(`new global for "%v" after update: %v`, file.Name, fl)
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t.Put(gk, mustMarshal(&fl))
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t.Put(gk, mustMarshal(&fl))
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return true
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return keyBuf, true
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}
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}
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// updateLocalNeeds checks whether the given file is still needed on the local
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// updateLocalNeed checks whether the given file is still needed on the local
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// device according to the version list and global FileInfo given and updates
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// device according to the version list and global FileInfo given and updates
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// the db accordingly.
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// the db accordingly.
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func (t readWriteTransaction) updateLocalNeed(folder, name []byte, fl VersionList, global protocol.FileInfo) {
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func (t readWriteTransaction) updateLocalNeed(keyBuf, folder, name []byte, fl VersionList, global protocol.FileInfo) []byte {
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nk := t.db.keyer.GenerateNeedFileKey(nil, folder, name)
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keyBuf = t.db.keyer.GenerateNeedFileKey(keyBuf, folder, name)
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hasNeeded, _ := t.db.Has(nk, nil)
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hasNeeded, _ := t.Has(keyBuf, nil)
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if localFV, haveLocalFV := fl.Get(protocol.LocalDeviceID[:]); need(global, haveLocalFV, localFV.Version) {
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if localFV, haveLocalFV := fl.Get(protocol.LocalDeviceID[:]); need(global, haveLocalFV, localFV.Version) {
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if !hasNeeded {
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if !hasNeeded {
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l.Debugf("local need insert; folder=%q, name=%q", folder, name)
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l.Debugf("local need insert; folder=%q, name=%q", folder, name)
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t.Put(nk, nil)
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t.Put(keyBuf, nil)
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}
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}
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} else if hasNeeded {
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} else if hasNeeded {
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l.Debugf("local need delete; folder=%q, name=%q", folder, name)
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l.Debugf("local need delete; folder=%q, name=%q", folder, name)
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t.Delete(nk)
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t.Delete(keyBuf)
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}
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}
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return keyBuf
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}
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}
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func need(global FileIntf, haveLocal bool, localVersion protocol.Vector) bool {
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func need(global FileIntf, haveLocal bool, localVersion protocol.Vector) bool {
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@ -222,54 +226,59 @@ func need(global FileIntf, haveLocal bool, localVersion protocol.Vector) bool {
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// removeFromGlobal removes the device from the global version list for the
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// removeFromGlobal removes the device from the global version list for the
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// given file. If the version list is empty after this, the file entry is
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// given file. If the version list is empty after this, the file entry is
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// removed entirely.
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// removed entirely.
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func (t readWriteTransaction) removeFromGlobal(gk, folder, device, file []byte, meta *metadataTracker) {
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func (t readWriteTransaction) removeFromGlobal(gk, keyBuf, folder, device []byte, file []byte, meta *metadataTracker) []byte {
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l.Debugf("remove from global; folder=%q device=%v file=%q", folder, protocol.DeviceIDFromBytes(device), file)
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l.Debugf("remove from global; folder=%q device=%v file=%q", folder, protocol.DeviceIDFromBytes(device), file)
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svl, err := t.Get(gk, nil)
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svl, err := t.Get(gk, nil)
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if err != nil {
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if err != nil {
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// We might be called to "remove" a global version that doesn't exist
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// We might be called to "remove" a global version that doesn't exist
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// if the first update for the file is already marked invalid.
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// if the first update for the file is already marked invalid.
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return
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return keyBuf
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}
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}
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var fl VersionList
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var fl VersionList
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err = fl.Unmarshal(svl)
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err = fl.Unmarshal(svl)
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if err != nil {
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if err != nil {
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l.Debugln("unmarshal error:", err)
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l.Debugln("unmarshal error:", err)
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return
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return keyBuf
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}
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}
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fl, _, removedAt := fl.pop(device)
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fl, _, removedAt := fl.pop(device)
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if removedAt == -1 {
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if removedAt == -1 {
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// There is no version for the given device
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// There is no version for the given device
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return
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return keyBuf
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}
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}
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if removedAt == 0 {
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if removedAt == 0 {
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// A failure to get the file here is surprising and our
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// A failure to get the file here is surprising and our
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// global size data will be incorrect until a restart...
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// global size data will be incorrect until a restart...
|
||||||
if f, ok := t.getFile(folder, device, file); ok {
|
keyBuf = t.db.keyer.GenerateDeviceFileKey(keyBuf, folder, device, file)
|
||||||
|
if f, ok := t.getFileByKey(keyBuf); ok {
|
||||||
meta.removeFile(protocol.GlobalDeviceID, f)
|
meta.removeFile(protocol.GlobalDeviceID, f)
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
if len(fl.Versions) == 0 {
|
if len(fl.Versions) == 0 {
|
||||||
t.Delete(t.db.keyer.GenerateNeedFileKey(nil, folder, file))
|
keyBuf = t.db.keyer.GenerateNeedFileKey(keyBuf, folder, file)
|
||||||
|
t.Delete(keyBuf)
|
||||||
t.Delete(gk)
|
t.Delete(gk)
|
||||||
return
|
return keyBuf
|
||||||
}
|
}
|
||||||
|
|
||||||
if removedAt == 0 {
|
if removedAt == 0 {
|
||||||
global, ok := t.getFile(folder, fl.Versions[0].Device, file)
|
keyBuf = t.db.keyer.GenerateDeviceFileKey(keyBuf, folder, fl.Versions[0].Device, file)
|
||||||
|
global, ok := t.getFileByKey(keyBuf)
|
||||||
if !ok {
|
if !ok {
|
||||||
panic("This file must exist in the db")
|
panic("This file must exist in the db")
|
||||||
}
|
}
|
||||||
t.updateLocalNeed(folder, file, fl, global)
|
keyBuf = t.updateLocalNeed(keyBuf, folder, file, fl, global)
|
||||||
meta.addFile(protocol.GlobalDeviceID, global)
|
meta.addFile(protocol.GlobalDeviceID, global)
|
||||||
}
|
}
|
||||||
|
|
||||||
l.Debugf("new global after remove: %v", fl)
|
l.Debugf("new global after remove: %v", fl)
|
||||||
t.Put(gk, mustMarshal(&fl))
|
t.Put(gk, mustMarshal(&fl))
|
||||||
|
|
||||||
|
return keyBuf
|
||||||
}
|
}
|
||||||
|
|
||||||
func (t readWriteTransaction) deleteKeyPrefix(prefix []byte) {
|
func (t readWriteTransaction) deleteKeyPrefix(prefix []byte) {
|
||||||
|
Loading…
Reference in New Issue
Block a user