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package filer2
import (
"context"
"fmt"
"os"
"path/filepath"
"strings"
"time"
"google.golang.org/grpc"
"github.com/karlseguin/ccache"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/wdclient"
)
const PaginationSize = 1024 * 256
var (
OS_UID = uint32(os.Getuid())
OS_GID = uint32(os.Getgid())
)
type Filer struct {
store *FilerStoreWrapper
directoryCache *ccache.Cache
MasterClient *wdclient.MasterClient
fileIdDeletionChan chan string
GrpcDialOption grpc.DialOption
}
func NewFiler(masters []string, grpcDialOption grpc.DialOption) *Filer {
f := &Filer{
directoryCache: ccache.New(ccache.Configure().MaxSize(1000).ItemsToPrune(100)),
MasterClient: wdclient.NewMasterClient(context.Background(), grpcDialOption, "filer", masters),
fileIdDeletionChan: make(chan string, PaginationSize),
GrpcDialOption: grpcDialOption,
}
go f.loopProcessingDeletion()
return f
}
func (f *Filer) SetStore(store FilerStore) {
f.store = NewFilerStoreWrapper(store)
}
func (f *Filer) DisableDirectoryCache() {
f.directoryCache = nil
}
func (fs *Filer) GetMaster() string {
return fs.MasterClient.GetMaster()
}
func (fs *Filer) KeepConnectedToMaster() {
fs.MasterClient.KeepConnectedToMaster()
}
func (f *Filer) BeginTransaction(ctx context.Context) (context.Context, error) {
return f.store.BeginTransaction(ctx)
}
func (f *Filer) CommitTransaction(ctx context.Context) error {
return f.store.CommitTransaction(ctx)
}
func (f *Filer) RollbackTransaction(ctx context.Context) error {
return f.store.RollbackTransaction(ctx)
}
func (f *Filer) CreateEntry(ctx context.Context, entry *Entry, o_excl bool) error {
if string(entry.FullPath) == "/" {
return nil
}
dirParts := strings.Split(string(entry.FullPath), "/")
// fmt.Printf("directory parts: %+v\n", dirParts)
var lastDirectoryEntry *Entry
for i := 1; i < len(dirParts); i++ {
dirPath := "/" + filepath.ToSlash(filepath.Join(dirParts[:i]...))
// fmt.Printf("%d directory: %+v\n", i, dirPath)
// first check local cache
dirEntry := f.cacheGetDirectory(dirPath)
// not found, check the store directly
if dirEntry == nil {
glog.V(4).Infof("find uncached directory: %s", dirPath)
dirEntry, _ = f.FindEntry(ctx, FullPath(dirPath))
} else {
// glog.V(4).Infof("found cached directory: %s", dirPath)
}
// no such existing directory
if dirEntry == nil {
// create the directory
now := time.Now()
dirEntry = &Entry{
FullPath: FullPath(dirPath),
Attr: Attr{
Mtime: now,
Crtime: now,
Mode: os.ModeDir | 0770,
Uid: entry.Uid,
Gid: entry.Gid,
},
}
glog.V(2).Infof("create directory: %s %v", dirPath, dirEntry.Mode)
mkdirErr := f.store.InsertEntry(ctx, dirEntry)
if mkdirErr != nil {
if _, err := f.FindEntry(ctx, FullPath(dirPath)); err == ErrNotFound {
glog.V(3).Infof("mkdir %s: %v", dirPath, mkdirErr)
return fmt.Errorf("mkdir %s: %v", dirPath, mkdirErr)
}
} else {
f.NotifyUpdateEvent(nil, dirEntry, false)
}
} else if !dirEntry.IsDirectory() {
glog.Errorf("CreateEntry %s: %s should be a directory", entry.FullPath, dirPath)
return fmt.Errorf("%s is a file", dirPath)
}
// cache the directory entry
f.cacheSetDirectory(dirPath, dirEntry, i)
// remember the direct parent directory entry
if i == len(dirParts)-1 {
lastDirectoryEntry = dirEntry
}
}
if lastDirectoryEntry == nil {
glog.Errorf("CreateEntry %s: lastDirectoryEntry is nil", entry.FullPath)
return fmt.Errorf("parent folder not found: %v", entry.FullPath)
}
/*
if !hasWritePermission(lastDirectoryEntry, entry) {
glog.V(0).Infof("directory %s: %v, entry: uid=%d gid=%d",
lastDirectoryEntry.FullPath, lastDirectoryEntry.Attr, entry.Uid, entry.Gid)
return fmt.Errorf("no write permission in folder %v", lastDirectoryEntry.FullPath)
}
*/
oldEntry, _ := f.FindEntry(ctx, entry.FullPath)
glog.V(4).Infof("CreateEntry %s: old entry : %v", entry.FullPath, oldEntry)
if oldEntry == nil {
if err := f.store.InsertEntry(ctx, entry); err != nil {
glog.Errorf("insert entry %s: %v", entry.FullPath, err)
return fmt.Errorf("insert entry %s: %v", entry.FullPath, err)
}
} else {
if o_excl {
glog.V(3).Infof("EEXIST: entry %s already exists", entry.FullPath)
return fmt.Errorf("EEXIST: entry %s already exists", entry.FullPath)
}
if err := f.UpdateEntry(ctx, oldEntry, entry); err != nil {
glog.Errorf("update entry %s: %v", entry.FullPath, err)
return fmt.Errorf("update entry %s: %v", entry.FullPath, err)
}
}
f.NotifyUpdateEvent(oldEntry, entry, true)
f.deleteChunksIfNotNew(oldEntry, entry)
glog.V(4).Infof("CreateEntry %s: created", entry.FullPath)
return nil
}
func (f *Filer) UpdateEntry(ctx context.Context, oldEntry, entry *Entry) (err error) {
if oldEntry != nil {
if oldEntry.IsDirectory() && !entry.IsDirectory() {
glog.Errorf("existing %s is a directory", entry.FullPath)
return fmt.Errorf("existing %s is a directory", entry.FullPath)
}
if !oldEntry.IsDirectory() && entry.IsDirectory() {
glog.Errorf("existing %s is a file", entry.FullPath)
return fmt.Errorf("existing %s is a file", entry.FullPath)
}
}
return f.store.UpdateEntry(ctx, entry)
}
func (f *Filer) FindEntry(ctx context.Context, p FullPath) (entry *Entry, err error) {
now := time.Now()
if string(p) == "/" {
return &Entry{
FullPath: p,
Attr: Attr{
Mtime: now,
Crtime: now,
Mode: os.ModeDir | 0755,
Uid: OS_UID,
Gid: OS_GID,
},
}, nil
}
return f.store.FindEntry(ctx, p)
}
func (f *Filer) ListDirectoryEntries(ctx context.Context, p FullPath, startFileName string, inclusive bool, limit int) ([]*Entry, error) {
if strings.HasSuffix(string(p), "/") && len(p) > 1 {
p = p[0 : len(p)-1]
}
return f.store.ListDirectoryEntries(ctx, p, startFileName, inclusive, limit)
}
func (f *Filer) cacheDelDirectory(dirpath string) {
if dirpath == "/" {
return
}
if f.directoryCache == nil {
return
}
f.directoryCache.Delete(dirpath)
return
}
func (f *Filer) cacheGetDirectory(dirpath string) *Entry {
if f.directoryCache == nil {
return nil
}
item := f.directoryCache.Get(dirpath)
if item == nil {
return nil
}
return item.Value().(*Entry)
}
func (f *Filer) cacheSetDirectory(dirpath string, dirEntry *Entry, level int) {
if f.directoryCache == nil {
return
}
minutes := 60
if level < 10 {
minutes -= level * 6
}
f.directoryCache.Set(dirpath, dirEntry, time.Duration(minutes)*time.Minute)
}
|
