mirror of
https://github.com/seaweedfs/seaweedfs.git
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257 lines
6 KiB
Go
257 lines
6 KiB
Go
package filer2
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import (
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"context"
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"fmt"
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"os"
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"path/filepath"
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"strings"
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"time"
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"google.golang.org/grpc"
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"github.com/karlseguin/ccache"
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"github.com/chrislusf/seaweedfs/weed/glog"
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"github.com/chrislusf/seaweedfs/weed/wdclient"
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)
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const PaginationSize = 1024 * 256
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var (
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OS_UID = uint32(os.Getuid())
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OS_GID = uint32(os.Getgid())
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)
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type Filer struct {
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store *FilerStoreWrapper
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directoryCache *ccache.Cache
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MasterClient *wdclient.MasterClient
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fileIdDeletionChan chan string
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GrpcDialOption grpc.DialOption
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}
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func NewFiler(masters []string, grpcDialOption grpc.DialOption) *Filer {
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f := &Filer{
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directoryCache: ccache.New(ccache.Configure().MaxSize(1000).ItemsToPrune(100)),
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MasterClient: wdclient.NewMasterClient(context.Background(), grpcDialOption, "filer", masters),
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fileIdDeletionChan: make(chan string, PaginationSize),
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GrpcDialOption: grpcDialOption,
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}
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go f.loopProcessingDeletion()
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return f
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}
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func (f *Filer) SetStore(store FilerStore) {
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f.store = NewFilerStoreWrapper(store)
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}
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func (f *Filer) DisableDirectoryCache() {
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f.directoryCache = nil
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}
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func (fs *Filer) GetMaster() string {
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return fs.MasterClient.GetMaster()
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}
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func (fs *Filer) KeepConnectedToMaster() {
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fs.MasterClient.KeepConnectedToMaster()
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}
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func (f *Filer) BeginTransaction(ctx context.Context) (context.Context, error) {
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return f.store.BeginTransaction(ctx)
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}
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func (f *Filer) CommitTransaction(ctx context.Context) error {
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return f.store.CommitTransaction(ctx)
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}
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func (f *Filer) RollbackTransaction(ctx context.Context) error {
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return f.store.RollbackTransaction(ctx)
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}
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func (f *Filer) CreateEntry(ctx context.Context, entry *Entry, o_excl bool) error {
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if string(entry.FullPath) == "/" {
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return nil
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}
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dirParts := strings.Split(string(entry.FullPath), "/")
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// fmt.Printf("directory parts: %+v\n", dirParts)
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var lastDirectoryEntry *Entry
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for i := 1; i < len(dirParts); i++ {
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dirPath := "/" + filepath.ToSlash(filepath.Join(dirParts[:i]...))
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// fmt.Printf("%d directory: %+v\n", i, dirPath)
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// first check local cache
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dirEntry := f.cacheGetDirectory(dirPath)
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// not found, check the store directly
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if dirEntry == nil {
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glog.V(4).Infof("find uncached directory: %s", dirPath)
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dirEntry, _ = f.FindEntry(ctx, FullPath(dirPath))
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} else {
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glog.V(4).Infof("found cached directory: %s", dirPath)
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}
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// no such existing directory
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if dirEntry == nil {
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// create the directory
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now := time.Now()
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dirEntry = &Entry{
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FullPath: FullPath(dirPath),
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Attr: Attr{
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Mtime: now,
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Crtime: now,
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Mode: os.ModeDir | 0770,
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Uid: entry.Uid,
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Gid: entry.Gid,
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},
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}
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glog.V(2).Infof("create directory: %s %v", dirPath, dirEntry.Mode)
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mkdirErr := f.store.InsertEntry(ctx, dirEntry)
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if mkdirErr != nil {
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if _, err := f.FindEntry(ctx, FullPath(dirPath)); err == ErrNotFound {
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return fmt.Errorf("mkdir %s: %v", dirPath, mkdirErr)
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}
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} else {
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f.NotifyUpdateEvent(nil, dirEntry, false)
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}
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} else if !dirEntry.IsDirectory() {
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return fmt.Errorf("%s is a file", dirPath)
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}
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// cache the directory entry
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f.cacheSetDirectory(dirPath, dirEntry, i)
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// remember the direct parent directory entry
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if i == len(dirParts)-1 {
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lastDirectoryEntry = dirEntry
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}
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}
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if lastDirectoryEntry == nil {
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return fmt.Errorf("parent folder not found: %v", entry.FullPath)
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}
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/*
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if !hasWritePermission(lastDirectoryEntry, entry) {
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glog.V(0).Infof("directory %s: %v, entry: uid=%d gid=%d",
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lastDirectoryEntry.FullPath, lastDirectoryEntry.Attr, entry.Uid, entry.Gid)
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return fmt.Errorf("no write permission in folder %v", lastDirectoryEntry.FullPath)
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}
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*/
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oldEntry, _ := f.FindEntry(ctx, entry.FullPath)
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if oldEntry == nil {
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if err := f.store.InsertEntry(ctx, entry); err != nil {
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glog.Errorf("insert entry %s: %v", entry.FullPath, err)
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return fmt.Errorf("insert entry %s: %v", entry.FullPath, err)
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}
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} else {
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if o_excl {
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return fmt.Errorf("EEXIST: entry %s already exists", entry.FullPath)
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}
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if err := f.UpdateEntry(ctx, oldEntry, entry); err != nil {
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glog.Errorf("update entry %s: %v", entry.FullPath, err)
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return fmt.Errorf("update entry %s: %v", entry.FullPath, err)
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}
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}
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f.NotifyUpdateEvent(oldEntry, entry, true)
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f.deleteChunksIfNotNew(oldEntry, entry)
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return nil
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}
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func (f *Filer) UpdateEntry(ctx context.Context, oldEntry, entry *Entry) (err error) {
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if oldEntry != nil {
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if oldEntry.IsDirectory() && !entry.IsDirectory() {
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glog.Errorf("existing %s is a directory", entry.FullPath)
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return fmt.Errorf("existing %s is a directory", entry.FullPath)
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}
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if !oldEntry.IsDirectory() && entry.IsDirectory() {
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glog.Errorf("existing %s is a file", entry.FullPath)
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return fmt.Errorf("existing %s is a file", entry.FullPath)
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}
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}
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return f.store.UpdateEntry(ctx, entry)
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}
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func (f *Filer) FindEntry(ctx context.Context, p FullPath) (entry *Entry, err error) {
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now := time.Now()
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if string(p) == "/" {
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return &Entry{
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FullPath: p,
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Attr: Attr{
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Mtime: now,
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Crtime: now,
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Mode: os.ModeDir | 0755,
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Uid: OS_UID,
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Gid: OS_GID,
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},
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}, nil
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}
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return f.store.FindEntry(ctx, p)
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}
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func (f *Filer) ListDirectoryEntries(ctx context.Context, p FullPath, startFileName string, inclusive bool, limit int) ([]*Entry, error) {
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if strings.HasSuffix(string(p), "/") && len(p) > 1 {
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p = p[0 : len(p)-1]
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}
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return f.store.ListDirectoryEntries(ctx, p, startFileName, inclusive, limit)
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}
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func (f *Filer) cacheDelDirectory(dirpath string) {
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if dirpath == "/" {
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return
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}
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if f.directoryCache == nil {
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return
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}
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f.directoryCache.Delete(dirpath)
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return
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}
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func (f *Filer) cacheGetDirectory(dirpath string) *Entry {
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if f.directoryCache == nil {
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return nil
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}
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item := f.directoryCache.Get(dirpath)
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if item == nil {
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return nil
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}
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return item.Value().(*Entry)
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}
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func (f *Filer) cacheSetDirectory(dirpath string, dirEntry *Entry, level int) {
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if f.directoryCache == nil {
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return
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}
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minutes := 60
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if level < 10 {
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minutes -= level * 6
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}
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f.directoryCache.Set(dirpath, dirEntry, time.Duration(minutes)*time.Minute)
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}
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