1051 lines
28 KiB
Go
1051 lines
28 KiB
Go
// +build !plan9
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package cache
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import (
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"bytes"
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"context"
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"encoding/binary"
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"encoding/json"
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"fmt"
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"io/ioutil"
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"os"
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"path"
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"strconv"
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"strings"
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"sync"
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"time"
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"github.com/pkg/errors"
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"github.com/rclone/rclone/fs"
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"github.com/rclone/rclone/fs/walk"
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bolt "go.etcd.io/bbolt"
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)
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// Constants
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const (
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RootBucket = "root"
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RootTsBucket = "rootTs"
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DataTsBucket = "dataTs"
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tempBucket = "pending"
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)
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// Features flags for this storage type
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type Features struct {
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PurgeDb bool // purge the db before starting
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DbWaitTime time.Duration // time to wait for DB to be available
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}
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var boltMap = make(map[string]*Persistent)
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var boltMapMx sync.Mutex
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// GetPersistent returns a single instance for the specific store
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func GetPersistent(dbPath, chunkPath string, f *Features) (*Persistent, error) {
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// write lock to create one
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boltMapMx.Lock()
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defer boltMapMx.Unlock()
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if b, ok := boltMap[dbPath]; ok {
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if !b.open {
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err := b.connect()
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if err != nil {
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return nil, err
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}
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}
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return b, nil
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}
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bb, err := newPersistent(dbPath, chunkPath, f)
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if err != nil {
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return nil, err
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}
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boltMap[dbPath] = bb
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return boltMap[dbPath], nil
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}
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type chunkInfo struct {
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Path string
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Offset int64
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Size int64
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}
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type tempUploadInfo struct {
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DestPath string
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AddedOn time.Time
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Started bool
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}
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// String representation of a tempUploadInfo
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func (t *tempUploadInfo) String() string {
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return fmt.Sprintf("%v - %v (%v)", t.DestPath, t.Started, t.AddedOn)
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}
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// Persistent is a wrapper of persistent storage for a bolt.DB file
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type Persistent struct {
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dbPath string
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dataPath string
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open bool
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db *bolt.DB
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cleanupMux sync.Mutex
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tempQueueMux sync.Mutex
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features *Features
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}
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// newPersistent builds a new wrapper and connects to the bolt.DB file
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func newPersistent(dbPath, chunkPath string, f *Features) (*Persistent, error) {
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b := &Persistent{
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dbPath: dbPath,
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dataPath: chunkPath,
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features: f,
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}
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err := b.connect()
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if err != nil {
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fs.Errorf(dbPath, "Error opening storage cache. Is there another rclone running on the same remote? %v", err)
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return nil, err
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}
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return b, nil
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}
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// String will return a human friendly string for this DB (currently the dbPath)
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func (b *Persistent) String() string {
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return "<Cache DB> " + b.dbPath
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}
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// connect creates a connection to the configured file
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// refreshDb will delete the file before to create an empty DB if it's set to true
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func (b *Persistent) connect() error {
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var err error
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err = os.MkdirAll(b.dataPath, os.ModePerm)
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if err != nil {
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return errors.Wrapf(err, "failed to create a data directory %q", b.dataPath)
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}
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b.db, err = bolt.Open(b.dbPath, 0644, &bolt.Options{Timeout: b.features.DbWaitTime})
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if err != nil {
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return errors.Wrapf(err, "failed to open a cache connection to %q", b.dbPath)
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}
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if b.features.PurgeDb {
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b.Purge()
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}
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_ = b.db.Update(func(tx *bolt.Tx) error {
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_, _ = tx.CreateBucketIfNotExists([]byte(RootBucket))
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_, _ = tx.CreateBucketIfNotExists([]byte(RootTsBucket))
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_, _ = tx.CreateBucketIfNotExists([]byte(DataTsBucket))
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_, _ = tx.CreateBucketIfNotExists([]byte(tempBucket))
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return nil
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})
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b.open = true
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return nil
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}
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// getBucket prepares and cleans a specific path of the form: /var/tmp and will iterate through each path component
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// to get to the nested bucket of the final part (in this example: tmp)
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func (b *Persistent) getBucket(dir string, createIfMissing bool, tx *bolt.Tx) *bolt.Bucket {
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cleanPath(dir)
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entries := strings.FieldsFunc(dir, func(c rune) bool {
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// cover Windows where rclone still uses '/' as path separator
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// this should be safe as '/' is not a valid Windows character
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return (os.PathSeparator == c || c == rune('/'))
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})
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bucket := tx.Bucket([]byte(RootBucket))
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for _, entry := range entries {
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if createIfMissing {
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bucket, _ = bucket.CreateBucketIfNotExists([]byte(entry))
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} else {
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bucket = bucket.Bucket([]byte(entry))
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}
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if bucket == nil {
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return nil
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}
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}
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return bucket
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}
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// GetDir will retrieve data of a cached directory
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func (b *Persistent) GetDir(remote string) (*Directory, error) {
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cd := &Directory{}
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err := b.db.View(func(tx *bolt.Tx) error {
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bucket := b.getBucket(remote, false, tx)
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if bucket == nil {
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return errors.Errorf("couldn't open bucket (%v)", remote)
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}
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data := bucket.Get([]byte("."))
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if data != nil {
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return json.Unmarshal(data, cd)
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}
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return errors.Errorf("%v not found", remote)
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})
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return cd, err
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}
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// AddDir will update a CachedDirectory metadata and all its entries
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func (b *Persistent) AddDir(cachedDir *Directory) error {
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return b.AddBatchDir([]*Directory{cachedDir})
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}
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// AddBatchDir will update a list of CachedDirectory metadata and all their entries
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func (b *Persistent) AddBatchDir(cachedDirs []*Directory) error {
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if len(cachedDirs) == 0 {
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return nil
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}
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return b.db.Update(func(tx *bolt.Tx) error {
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var bucket *bolt.Bucket
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if cachedDirs[0].Dir == "" {
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bucket = tx.Bucket([]byte(RootBucket))
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} else {
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bucket = b.getBucket(cachedDirs[0].Dir, true, tx)
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}
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if bucket == nil {
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return errors.Errorf("couldn't open bucket (%v)", cachedDirs[0].Dir)
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}
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for _, cachedDir := range cachedDirs {
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var b *bolt.Bucket
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var err error
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if cachedDir.Name == "" {
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b = bucket
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} else {
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b, err = bucket.CreateBucketIfNotExists([]byte(cachedDir.Name))
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}
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if err != nil {
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return err
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}
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encoded, err := json.Marshal(cachedDir)
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if err != nil {
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return errors.Errorf("couldn't marshal object (%v): %v", cachedDir, err)
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}
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err = b.Put([]byte("."), encoded)
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if err != nil {
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return err
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}
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}
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return nil
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})
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}
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// GetDirEntries will return a CachedDirectory, its list of dir entries and/or an error if it encountered issues
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func (b *Persistent) GetDirEntries(cachedDir *Directory) (fs.DirEntries, error) {
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var dirEntries fs.DirEntries
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err := b.db.View(func(tx *bolt.Tx) error {
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bucket := b.getBucket(cachedDir.abs(), false, tx)
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if bucket == nil {
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return errors.Errorf("couldn't open bucket (%v)", cachedDir.abs())
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}
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val := bucket.Get([]byte("."))
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if val != nil {
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err := json.Unmarshal(val, cachedDir)
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if err != nil {
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return errors.Errorf("error during unmarshalling obj: %v", err)
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}
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} else {
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return errors.Errorf("missing cached dir: %v", cachedDir)
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}
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c := bucket.Cursor()
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for k, v := c.First(); k != nil; k, v = c.Next() {
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// ignore metadata key: .
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if bytes.Equal(k, []byte(".")) {
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continue
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}
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entryPath := path.Join(cachedDir.Remote(), string(k))
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if v == nil { // directory
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// we try to find a cached meta for the dir
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currentBucket := c.Bucket().Bucket(k)
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if currentBucket == nil {
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return errors.Errorf("couldn't open bucket (%v)", string(k))
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}
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metaKey := currentBucket.Get([]byte("."))
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d := NewDirectory(cachedDir.CacheFs, entryPath)
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if metaKey != nil { //if we don't find it, we create an empty dir
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err := json.Unmarshal(metaKey, d)
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if err != nil { // if even this fails, we fallback to an empty dir
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fs.Debugf(string(k), "error during unmarshalling obj: %v", err)
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}
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}
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dirEntries = append(dirEntries, d)
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} else { // object
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o := NewObject(cachedDir.CacheFs, entryPath)
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err := json.Unmarshal(v, o)
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if err != nil {
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fs.Debugf(string(k), "error during unmarshalling obj: %v", err)
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continue
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}
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dirEntries = append(dirEntries, o)
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}
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}
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return nil
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})
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return dirEntries, err
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}
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// RemoveDir will delete a CachedDirectory, all its objects and all the chunks stored for it
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func (b *Persistent) RemoveDir(fp string) error {
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var err error
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parentDir, dirName := path.Split(fp)
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if fp == "" {
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err = b.db.Update(func(tx *bolt.Tx) error {
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err := tx.DeleteBucket([]byte(RootBucket))
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if err != nil {
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fs.Debugf(fp, "couldn't delete from cache: %v", err)
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return err
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}
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_, _ = tx.CreateBucketIfNotExists([]byte(RootBucket))
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return nil
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})
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} else {
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err = b.db.Update(func(tx *bolt.Tx) error {
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bucket := b.getBucket(cleanPath(parentDir), false, tx)
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if bucket == nil {
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return errors.Errorf("couldn't open bucket (%v)", fp)
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}
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// delete the cached dir
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err := bucket.DeleteBucket([]byte(cleanPath(dirName)))
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if err != nil {
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fs.Debugf(fp, "couldn't delete from cache: %v", err)
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}
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return nil
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})
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}
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// delete chunks on disk
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// safe to ignore as the files might not have been open
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if err == nil {
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_ = os.RemoveAll(path.Join(b.dataPath, fp))
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_ = os.MkdirAll(b.dataPath, os.ModePerm)
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}
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return err
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}
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// ExpireDir will flush a CachedDirectory and all its objects from the objects
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// chunks will remain as they are
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func (b *Persistent) ExpireDir(cd *Directory) error {
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t := time.Now().Add(time.Duration(-cd.CacheFs.opt.InfoAge))
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cd.CacheTs = &t
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// expire all parents
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return b.db.Update(func(tx *bolt.Tx) error {
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// expire all the parents
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currentDir := cd.abs()
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for { // until we get to the root
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bucket := b.getBucket(currentDir, false, tx)
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if bucket != nil {
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val := bucket.Get([]byte("."))
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if val != nil {
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cd2 := &Directory{CacheFs: cd.CacheFs}
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err := json.Unmarshal(val, cd2)
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if err == nil {
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fs.Debugf(cd, "cache: expired %v", currentDir)
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cd2.CacheTs = &t
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enc2, _ := json.Marshal(cd2)
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_ = bucket.Put([]byte("."), enc2)
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}
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}
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}
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if currentDir == "" {
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break
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}
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currentDir = cleanPath(path.Dir(currentDir))
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}
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return nil
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})
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}
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// GetObject will return a CachedObject from its parent directory or an error if it doesn't find it
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func (b *Persistent) GetObject(cachedObject *Object) (err error) {
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return b.db.View(func(tx *bolt.Tx) error {
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bucket := b.getBucket(cachedObject.Dir, false, tx)
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if bucket == nil {
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return errors.Errorf("couldn't open parent bucket for %v", cachedObject.Dir)
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}
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val := bucket.Get([]byte(cachedObject.Name))
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if val != nil {
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return json.Unmarshal(val, cachedObject)
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}
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return errors.Errorf("couldn't find object (%v)", cachedObject.Name)
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})
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}
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// AddObject will create a cached object in its parent directory
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func (b *Persistent) AddObject(cachedObject *Object) error {
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return b.db.Update(func(tx *bolt.Tx) error {
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bucket := b.getBucket(cachedObject.Dir, true, tx)
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if bucket == nil {
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return errors.Errorf("couldn't open parent bucket for %v", cachedObject)
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}
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// cache Object Info
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encoded, err := json.Marshal(cachedObject)
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if err != nil {
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return errors.Errorf("couldn't marshal object (%v) info: %v", cachedObject, err)
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}
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err = bucket.Put([]byte(cachedObject.Name), encoded)
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if err != nil {
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return errors.Errorf("couldn't cache object (%v) info: %v", cachedObject, err)
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}
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return nil
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})
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}
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// RemoveObject will delete a single cached object and all the chunks which belong to it
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func (b *Persistent) RemoveObject(fp string) error {
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parentDir, objName := path.Split(fp)
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return b.db.Update(func(tx *bolt.Tx) error {
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bucket := b.getBucket(cleanPath(parentDir), false, tx)
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if bucket == nil {
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return errors.Errorf("couldn't open parent bucket for %v", cleanPath(parentDir))
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}
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err := bucket.Delete([]byte(cleanPath(objName)))
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if err != nil {
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fs.Debugf(fp, "couldn't delete obj from storage: %v", err)
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}
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// delete chunks on disk
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// safe to ignore as the file might not have been open
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_ = os.RemoveAll(path.Join(b.dataPath, fp))
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return nil
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})
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}
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// ExpireObject will flush an Object and all its data if desired
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func (b *Persistent) ExpireObject(co *Object, withData bool) error {
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co.CacheTs = time.Now().Add(time.Duration(-co.CacheFs.opt.InfoAge))
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err := b.AddObject(co)
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if withData {
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_ = os.RemoveAll(path.Join(b.dataPath, co.abs()))
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}
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return err
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}
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// HasEntry confirms the existence of a single entry (dir or object)
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func (b *Persistent) HasEntry(remote string) bool {
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dir, name := path.Split(remote)
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dir = cleanPath(dir)
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name = cleanPath(name)
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err := b.db.View(func(tx *bolt.Tx) error {
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bucket := b.getBucket(dir, false, tx)
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if bucket == nil {
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return errors.Errorf("couldn't open parent bucket for %v", remote)
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}
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if f := bucket.Bucket([]byte(name)); f != nil {
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return nil
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}
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if f := bucket.Get([]byte(name)); f != nil {
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return nil
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}
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return errors.Errorf("couldn't find object (%v)", remote)
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})
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if err == nil {
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return true
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}
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return false
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}
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// HasChunk confirms the existence of a single chunk of an object
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func (b *Persistent) HasChunk(cachedObject *Object, offset int64) bool {
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fp := path.Join(b.dataPath, cachedObject.abs(), strconv.FormatInt(offset, 10))
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if _, err := os.Stat(fp); !os.IsNotExist(err) {
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return true
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}
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return false
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}
|
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// GetChunk will retrieve a single chunk which belongs to a cached object or an error if it doesn't find it
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func (b *Persistent) GetChunk(cachedObject *Object, offset int64) ([]byte, error) {
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var data []byte
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fp := path.Join(b.dataPath, cachedObject.abs(), strconv.FormatInt(offset, 10))
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data, err := ioutil.ReadFile(fp)
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if err != nil {
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return nil, err
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}
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return data, err
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}
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// AddChunk adds a new chunk of a cached object
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func (b *Persistent) AddChunk(fp string, data []byte, offset int64) error {
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_ = os.MkdirAll(path.Join(b.dataPath, fp), os.ModePerm)
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filePath := path.Join(b.dataPath, fp, strconv.FormatInt(offset, 10))
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err := ioutil.WriteFile(filePath, data, os.ModePerm)
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if err != nil {
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return err
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}
|
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|
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return b.db.Update(func(tx *bolt.Tx) error {
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tsBucket := tx.Bucket([]byte(DataTsBucket))
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ts := time.Now()
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found := false
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// delete (older) timestamps for the same object
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c := tsBucket.Cursor()
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for k, v := c.First(); k != nil; k, v = c.Next() {
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var ci chunkInfo
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err = json.Unmarshal(v, &ci)
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if err != nil {
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continue
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}
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if ci.Path == fp && ci.Offset == offset {
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if tsInCache := time.Unix(0, btoi(k)); tsInCache.After(ts) && !found {
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found = true
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continue
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}
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err := c.Delete()
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if err != nil {
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fs.Debugf(fp, "failed to clean chunk: %v", err)
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}
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}
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}
|
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// don't overwrite if a newer one is already there
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if found {
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return nil
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}
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enc, err := json.Marshal(chunkInfo{Path: fp, Offset: offset, Size: int64(len(data))})
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if err != nil {
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fs.Debugf(fp, "failed to timestamp chunk: %v", err)
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}
|
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err = tsBucket.Put(itob(ts.UnixNano()), enc)
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if err != nil {
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fs.Debugf(fp, "failed to timestamp chunk: %v", err)
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}
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return nil
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})
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}
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|
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// CleanChunksByAge will cleanup on a cron basis
|
|
func (b *Persistent) CleanChunksByAge(chunkAge time.Duration) {
|
|
// NOOP
|
|
}
|
|
|
|
// CleanChunksByNeed is a noop for this implementation
|
|
func (b *Persistent) CleanChunksByNeed(offset int64) {
|
|
// noop: we want to clean a Bolt DB by time only
|
|
}
|
|
|
|
// CleanChunksBySize will cleanup chunks after the total size passes a certain point
|
|
func (b *Persistent) CleanChunksBySize(maxSize int64) {
|
|
b.cleanupMux.Lock()
|
|
defer b.cleanupMux.Unlock()
|
|
var cntChunks int
|
|
var roughlyCleaned fs.SizeSuffix
|
|
|
|
err := b.db.Update(func(tx *bolt.Tx) error {
|
|
dataTsBucket := tx.Bucket([]byte(DataTsBucket))
|
|
if dataTsBucket == nil {
|
|
return errors.Errorf("Couldn't open (%v) bucket", DataTsBucket)
|
|
}
|
|
// iterate through ts
|
|
c := dataTsBucket.Cursor()
|
|
totalSize := int64(0)
|
|
for k, v := c.First(); k != nil; k, v = c.Next() {
|
|
var ci chunkInfo
|
|
err := json.Unmarshal(v, &ci)
|
|
if err != nil {
|
|
continue
|
|
}
|
|
|
|
totalSize += ci.Size
|
|
}
|
|
|
|
if totalSize > maxSize {
|
|
needToClean := totalSize - maxSize
|
|
roughlyCleaned = fs.SizeSuffix(needToClean)
|
|
for k, v := c.First(); k != nil; k, v = c.Next() {
|
|
var ci chunkInfo
|
|
err := json.Unmarshal(v, &ci)
|
|
if err != nil {
|
|
continue
|
|
}
|
|
// delete this ts entry
|
|
err = c.Delete()
|
|
if err != nil {
|
|
fs.Errorf(ci.Path, "failed deleting chunk ts during cleanup (%v): %v", ci.Offset, err)
|
|
continue
|
|
}
|
|
err = os.Remove(path.Join(b.dataPath, ci.Path, strconv.FormatInt(ci.Offset, 10)))
|
|
if err == nil {
|
|
cntChunks++
|
|
needToClean -= ci.Size
|
|
if needToClean <= 0 {
|
|
break
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if cntChunks > 0 {
|
|
fs.Infof("cache-cleanup", "chunks %v, est. size: %v", cntChunks, roughlyCleaned.String())
|
|
|
|
}
|
|
return nil
|
|
})
|
|
|
|
if err != nil {
|
|
if err == bolt.ErrDatabaseNotOpen {
|
|
// we're likely a late janitor and we need to end quietly as there's no guarantee of what exists anymore
|
|
return
|
|
}
|
|
fs.Errorf("cache", "cleanup failed: %v", err)
|
|
}
|
|
}
|
|
|
|
// Stats returns a go map with the stats key values
|
|
func (b *Persistent) Stats() (map[string]map[string]interface{}, error) {
|
|
r := make(map[string]map[string]interface{})
|
|
r["data"] = make(map[string]interface{})
|
|
r["data"]["oldest-ts"] = time.Now()
|
|
r["data"]["oldest-file"] = ""
|
|
r["data"]["newest-ts"] = time.Now()
|
|
r["data"]["newest-file"] = ""
|
|
r["data"]["total-chunks"] = 0
|
|
r["data"]["total-size"] = int64(0)
|
|
r["files"] = make(map[string]interface{})
|
|
r["files"]["oldest-ts"] = time.Now()
|
|
r["files"]["oldest-name"] = ""
|
|
r["files"]["newest-ts"] = time.Now()
|
|
r["files"]["newest-name"] = ""
|
|
r["files"]["total-files"] = 0
|
|
|
|
_ = b.db.View(func(tx *bolt.Tx) error {
|
|
dataTsBucket := tx.Bucket([]byte(DataTsBucket))
|
|
rootTsBucket := tx.Bucket([]byte(RootTsBucket))
|
|
|
|
var totalDirs int
|
|
var totalFiles int
|
|
_ = b.iterateBuckets(tx.Bucket([]byte(RootBucket)), func(name string) {
|
|
totalDirs++
|
|
}, func(key string, val []byte) {
|
|
totalFiles++
|
|
})
|
|
r["files"]["total-dir"] = totalDirs
|
|
r["files"]["total-files"] = totalFiles
|
|
|
|
c := dataTsBucket.Cursor()
|
|
|
|
totalChunks := 0
|
|
totalSize := int64(0)
|
|
for k, v := c.First(); k != nil; k, v = c.Next() {
|
|
var ci chunkInfo
|
|
err := json.Unmarshal(v, &ci)
|
|
if err != nil {
|
|
continue
|
|
}
|
|
totalChunks++
|
|
totalSize += ci.Size
|
|
}
|
|
r["data"]["total-chunks"] = totalChunks
|
|
r["data"]["total-size"] = totalSize
|
|
|
|
if k, v := c.First(); k != nil {
|
|
var ci chunkInfo
|
|
_ = json.Unmarshal(v, &ci)
|
|
r["data"]["oldest-ts"] = time.Unix(0, btoi(k))
|
|
r["data"]["oldest-file"] = ci.Path
|
|
}
|
|
if k, v := c.Last(); k != nil {
|
|
var ci chunkInfo
|
|
_ = json.Unmarshal(v, &ci)
|
|
r["data"]["newest-ts"] = time.Unix(0, btoi(k))
|
|
r["data"]["newest-file"] = ci.Path
|
|
}
|
|
|
|
c = rootTsBucket.Cursor()
|
|
if k, v := c.First(); k != nil {
|
|
// split to get (abs path - offset)
|
|
r["files"]["oldest-ts"] = time.Unix(0, btoi(k))
|
|
r["files"]["oldest-name"] = string(v)
|
|
}
|
|
if k, v := c.Last(); k != nil {
|
|
r["files"]["newest-ts"] = time.Unix(0, btoi(k))
|
|
r["files"]["newest-name"] = string(v)
|
|
}
|
|
|
|
return nil
|
|
})
|
|
|
|
return r, nil
|
|
}
|
|
|
|
// Purge will flush the entire cache
|
|
func (b *Persistent) Purge() {
|
|
b.cleanupMux.Lock()
|
|
defer b.cleanupMux.Unlock()
|
|
|
|
_ = b.db.Update(func(tx *bolt.Tx) error {
|
|
_ = tx.DeleteBucket([]byte(RootBucket))
|
|
_ = tx.DeleteBucket([]byte(RootTsBucket))
|
|
_ = tx.DeleteBucket([]byte(DataTsBucket))
|
|
|
|
_, _ = tx.CreateBucketIfNotExists([]byte(RootBucket))
|
|
_, _ = tx.CreateBucketIfNotExists([]byte(RootTsBucket))
|
|
_, _ = tx.CreateBucketIfNotExists([]byte(DataTsBucket))
|
|
|
|
return nil
|
|
})
|
|
|
|
err := os.RemoveAll(b.dataPath)
|
|
if err != nil {
|
|
fs.Errorf(b, "issue removing data folder: %v", err)
|
|
}
|
|
err = os.MkdirAll(b.dataPath, os.ModePerm)
|
|
if err != nil {
|
|
fs.Errorf(b, "issue removing data folder: %v", err)
|
|
}
|
|
}
|
|
|
|
// GetChunkTs retrieves the current timestamp of this chunk
|
|
func (b *Persistent) GetChunkTs(path string, offset int64) (time.Time, error) {
|
|
var t time.Time
|
|
|
|
err := b.db.View(func(tx *bolt.Tx) error {
|
|
tsBucket := tx.Bucket([]byte(DataTsBucket))
|
|
c := tsBucket.Cursor()
|
|
for k, v := c.First(); k != nil; k, v = c.Next() {
|
|
var ci chunkInfo
|
|
err := json.Unmarshal(v, &ci)
|
|
if err != nil {
|
|
continue
|
|
}
|
|
if ci.Path == path && ci.Offset == offset {
|
|
t = time.Unix(0, btoi(k))
|
|
return nil
|
|
}
|
|
}
|
|
return errors.Errorf("not found %v-%v", path, offset)
|
|
})
|
|
|
|
return t, err
|
|
}
|
|
|
|
func (b *Persistent) iterateBuckets(buk *bolt.Bucket, bucketFn func(name string), kvFn func(key string, val []byte)) error {
|
|
err := b.db.View(func(tx *bolt.Tx) error {
|
|
var c *bolt.Cursor
|
|
if buk == nil {
|
|
c = tx.Cursor()
|
|
} else {
|
|
c = buk.Cursor()
|
|
}
|
|
for k, v := c.First(); k != nil; k, v = c.Next() {
|
|
if v == nil {
|
|
var buk2 *bolt.Bucket
|
|
if buk == nil {
|
|
buk2 = tx.Bucket(k)
|
|
} else {
|
|
buk2 = buk.Bucket(k)
|
|
}
|
|
|
|
bucketFn(string(k))
|
|
_ = b.iterateBuckets(buk2, bucketFn, kvFn)
|
|
} else {
|
|
kvFn(string(k), v)
|
|
}
|
|
}
|
|
return nil
|
|
})
|
|
|
|
return err
|
|
}
|
|
|
|
// addPendingUpload adds a new file to the pending queue of uploads
|
|
func (b *Persistent) addPendingUpload(destPath string, started bool) error {
|
|
return b.db.Update(func(tx *bolt.Tx) error {
|
|
bucket, err := tx.CreateBucketIfNotExists([]byte(tempBucket))
|
|
if err != nil {
|
|
return errors.Errorf("couldn't bucket for %v", tempBucket)
|
|
}
|
|
tempObj := &tempUploadInfo{
|
|
DestPath: destPath,
|
|
AddedOn: time.Now(),
|
|
Started: started,
|
|
}
|
|
|
|
// cache Object Info
|
|
encoded, err := json.Marshal(tempObj)
|
|
if err != nil {
|
|
return errors.Errorf("couldn't marshal object (%v) info: %v", destPath, err)
|
|
}
|
|
err = bucket.Put([]byte(destPath), encoded)
|
|
if err != nil {
|
|
return errors.Errorf("couldn't cache object (%v) info: %v", destPath, err)
|
|
}
|
|
|
|
return nil
|
|
})
|
|
}
|
|
|
|
// getPendingUpload returns the next file from the pending queue of uploads
|
|
func (b *Persistent) getPendingUpload(inRoot string, waitTime time.Duration) (destPath string, err error) {
|
|
b.tempQueueMux.Lock()
|
|
defer b.tempQueueMux.Unlock()
|
|
|
|
err = b.db.Update(func(tx *bolt.Tx) error {
|
|
bucket, err := tx.CreateBucketIfNotExists([]byte(tempBucket))
|
|
if err != nil {
|
|
return errors.Errorf("couldn't bucket for %v", tempBucket)
|
|
}
|
|
|
|
c := bucket.Cursor()
|
|
for k, v := c.Seek([]byte(inRoot)); k != nil && bytes.HasPrefix(k, []byte(inRoot)); k, v = c.Next() {
|
|
//for k, v := c.First(); k != nil; k, v = c.Next() {
|
|
var tempObj = &tempUploadInfo{}
|
|
err = json.Unmarshal(v, tempObj)
|
|
if err != nil {
|
|
fs.Errorf(b, "failed to read pending upload: %v", err)
|
|
continue
|
|
}
|
|
// skip over started uploads
|
|
if tempObj.Started || time.Now().Before(tempObj.AddedOn.Add(waitTime)) {
|
|
continue
|
|
}
|
|
|
|
tempObj.Started = true
|
|
v2, err := json.Marshal(tempObj)
|
|
if err != nil {
|
|
fs.Errorf(b, "failed to update pending upload: %v", err)
|
|
continue
|
|
}
|
|
err = bucket.Put(k, v2)
|
|
if err != nil {
|
|
fs.Errorf(b, "failed to update pending upload: %v", err)
|
|
continue
|
|
}
|
|
|
|
destPath = tempObj.DestPath
|
|
return nil
|
|
}
|
|
|
|
return errors.Errorf("no pending upload found")
|
|
})
|
|
|
|
return destPath, err
|
|
}
|
|
|
|
// SearchPendingUpload returns the file info from the pending queue of uploads
|
|
func (b *Persistent) SearchPendingUpload(remote string) (started bool, err error) {
|
|
err = b.db.View(func(tx *bolt.Tx) error {
|
|
bucket := tx.Bucket([]byte(tempBucket))
|
|
if bucket == nil {
|
|
return errors.Errorf("couldn't bucket for %v", tempBucket)
|
|
}
|
|
|
|
var tempObj = &tempUploadInfo{}
|
|
v := bucket.Get([]byte(remote))
|
|
err = json.Unmarshal(v, tempObj)
|
|
if err != nil {
|
|
return errors.Errorf("pending upload (%v) not found %v", remote, err)
|
|
}
|
|
|
|
started = tempObj.Started
|
|
return nil
|
|
})
|
|
|
|
return started, err
|
|
}
|
|
|
|
// searchPendingUploadFromDir files currently pending upload from a single dir
|
|
func (b *Persistent) searchPendingUploadFromDir(dir string) (remotes []string, err error) {
|
|
err = b.db.View(func(tx *bolt.Tx) error {
|
|
bucket := tx.Bucket([]byte(tempBucket))
|
|
if bucket == nil {
|
|
return errors.Errorf("couldn't bucket for %v", tempBucket)
|
|
}
|
|
|
|
c := bucket.Cursor()
|
|
for k, v := c.First(); k != nil; k, v = c.Next() {
|
|
var tempObj = &tempUploadInfo{}
|
|
err = json.Unmarshal(v, tempObj)
|
|
if err != nil {
|
|
fs.Errorf(b, "failed to read pending upload: %v", err)
|
|
continue
|
|
}
|
|
parentDir := cleanPath(path.Dir(tempObj.DestPath))
|
|
if dir == parentDir {
|
|
remotes = append(remotes, tempObj.DestPath)
|
|
}
|
|
}
|
|
|
|
return nil
|
|
})
|
|
|
|
return remotes, err
|
|
}
|
|
|
|
func (b *Persistent) rollbackPendingUpload(remote string) error {
|
|
b.tempQueueMux.Lock()
|
|
defer b.tempQueueMux.Unlock()
|
|
|
|
return b.db.Update(func(tx *bolt.Tx) error {
|
|
bucket, err := tx.CreateBucketIfNotExists([]byte(tempBucket))
|
|
if err != nil {
|
|
return errors.Errorf("couldn't bucket for %v", tempBucket)
|
|
}
|
|
var tempObj = &tempUploadInfo{}
|
|
v := bucket.Get([]byte(remote))
|
|
err = json.Unmarshal(v, tempObj)
|
|
if err != nil {
|
|
return errors.Errorf("pending upload (%v) not found %v", remote, err)
|
|
}
|
|
tempObj.Started = false
|
|
v2, err := json.Marshal(tempObj)
|
|
if err != nil {
|
|
return errors.Errorf("pending upload not updated %v", err)
|
|
}
|
|
err = bucket.Put([]byte(tempObj.DestPath), v2)
|
|
if err != nil {
|
|
return errors.Errorf("pending upload not updated %v", err)
|
|
}
|
|
return nil
|
|
})
|
|
}
|
|
|
|
func (b *Persistent) removePendingUpload(remote string) error {
|
|
b.tempQueueMux.Lock()
|
|
defer b.tempQueueMux.Unlock()
|
|
|
|
return b.db.Update(func(tx *bolt.Tx) error {
|
|
bucket, err := tx.CreateBucketIfNotExists([]byte(tempBucket))
|
|
if err != nil {
|
|
return errors.Errorf("couldn't bucket for %v", tempBucket)
|
|
}
|
|
return bucket.Delete([]byte(remote))
|
|
})
|
|
}
|
|
|
|
// updatePendingUpload allows to update an existing item in the queue while checking if it's not started in the same
|
|
// transaction. If it is started, it will not allow the update
|
|
func (b *Persistent) updatePendingUpload(remote string, fn func(item *tempUploadInfo) error) error {
|
|
b.tempQueueMux.Lock()
|
|
defer b.tempQueueMux.Unlock()
|
|
|
|
return b.db.Update(func(tx *bolt.Tx) error {
|
|
bucket, err := tx.CreateBucketIfNotExists([]byte(tempBucket))
|
|
if err != nil {
|
|
return errors.Errorf("couldn't bucket for %v", tempBucket)
|
|
}
|
|
|
|
var tempObj = &tempUploadInfo{}
|
|
v := bucket.Get([]byte(remote))
|
|
err = json.Unmarshal(v, tempObj)
|
|
if err != nil {
|
|
return errors.Errorf("pending upload (%v) not found %v", remote, err)
|
|
}
|
|
if tempObj.Started {
|
|
return errors.Errorf("pending upload already started %v", remote)
|
|
}
|
|
err = fn(tempObj)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if remote != tempObj.DestPath {
|
|
err := bucket.Delete([]byte(remote))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
// if this is removed then the entry can be removed too
|
|
if tempObj.DestPath == "" {
|
|
return nil
|
|
}
|
|
}
|
|
v2, err := json.Marshal(tempObj)
|
|
if err != nil {
|
|
return errors.Errorf("pending upload not updated %v", err)
|
|
}
|
|
err = bucket.Put([]byte(tempObj.DestPath), v2)
|
|
if err != nil {
|
|
return errors.Errorf("pending upload not updated %v", err)
|
|
}
|
|
|
|
return nil
|
|
})
|
|
}
|
|
|
|
// ReconcileTempUploads will recursively look for all the files in the temp directory and add them to the queue
|
|
func (b *Persistent) ReconcileTempUploads(ctx context.Context, cacheFs *Fs) error {
|
|
return b.db.Update(func(tx *bolt.Tx) error {
|
|
_ = tx.DeleteBucket([]byte(tempBucket))
|
|
bucket, err := tx.CreateBucketIfNotExists([]byte(tempBucket))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
var queuedEntries []fs.Object
|
|
err = walk.ListR(ctx, cacheFs.tempFs, "", true, -1, walk.ListObjects, func(entries fs.DirEntries) error {
|
|
for _, o := range entries {
|
|
if oo, ok := o.(fs.Object); ok {
|
|
queuedEntries = append(queuedEntries, oo)
|
|
}
|
|
}
|
|
return nil
|
|
})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
fs.Debugf(cacheFs, "reconciling temporary uploads")
|
|
for _, queuedEntry := range queuedEntries {
|
|
destPath := path.Join(cacheFs.Root(), queuedEntry.Remote())
|
|
tempObj := &tempUploadInfo{
|
|
DestPath: destPath,
|
|
AddedOn: time.Now(),
|
|
Started: false,
|
|
}
|
|
|
|
// cache Object Info
|
|
encoded, err := json.Marshal(tempObj)
|
|
if err != nil {
|
|
return errors.Errorf("couldn't marshal object (%v) info: %v", queuedEntry, err)
|
|
}
|
|
err = bucket.Put([]byte(destPath), encoded)
|
|
if err != nil {
|
|
return errors.Errorf("couldn't cache object (%v) info: %v", destPath, err)
|
|
}
|
|
fs.Debugf(cacheFs, "reconciled temporary upload: %v", destPath)
|
|
}
|
|
|
|
return nil
|
|
})
|
|
}
|
|
|
|
// Close should be called when the program ends gracefully
|
|
func (b *Persistent) Close() {
|
|
b.cleanupMux.Lock()
|
|
defer b.cleanupMux.Unlock()
|
|
|
|
err := b.db.Close()
|
|
if err != nil {
|
|
fs.Errorf(b, "closing handle: %v", err)
|
|
}
|
|
b.open = false
|
|
}
|
|
|
|
// itob returns an 8-byte big endian representation of v.
|
|
func itob(v int64) []byte {
|
|
b := make([]byte, 8)
|
|
binary.BigEndian.PutUint64(b, uint64(v))
|
|
return b
|
|
}
|
|
|
|
func btoi(d []byte) int64 {
|
|
return int64(binary.BigEndian.Uint64(d))
|
|
}
|