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|
package filer
import (
"context"
"fmt"
"os"
"strings"
"time"
"google.golang.org/grpc"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
"github.com/chrislusf/seaweedfs/weed/util"
"github.com/chrislusf/seaweedfs/weed/util/log_buffer"
"github.com/chrislusf/seaweedfs/weed/wdclient"
)
const (
LogFlushInterval = time.Minute
PaginationSize = 1024
FilerStoreId = "filer.store.id"
)
var (
OS_UID = uint32(os.Getuid())
OS_GID = uint32(os.Getgid())
)
type Filer struct {
Store VirtualFilerStore
MasterClient *wdclient.MasterClient
fileIdDeletionQueue *util.UnboundedQueue
GrpcDialOption grpc.DialOption
DirBucketsPath string
FsyncBuckets []string
buckets *FilerBuckets
Cipher bool
LocalMetaLogBuffer *log_buffer.LogBuffer
metaLogCollection string
metaLogReplication string
MetaAggregator *MetaAggregator
Signature int32
FilerConf *FilerConf
}
func NewFiler(masters []string, grpcDialOption grpc.DialOption,
filerHost string, filerGrpcPort uint32, collection string, replication string, dataCenter string, notifyFn func()) *Filer {
f := &Filer{
MasterClient: wdclient.NewMasterClient(grpcDialOption, "filer", filerHost, filerGrpcPort, dataCenter, masters),
fileIdDeletionQueue: util.NewUnboundedQueue(),
GrpcDialOption: grpcDialOption,
FilerConf: NewFilerConf(),
}
f.LocalMetaLogBuffer = log_buffer.NewLogBuffer(LogFlushInterval, f.logFlushFunc, notifyFn)
f.metaLogCollection = collection
f.metaLogReplication = replication
go f.loopProcessingDeletion()
return f
}
func (f *Filer) AggregateFromPeers(self string, filers []string) {
// set peers
found := false
for _, peer := range filers {
if peer == self {
found = true
}
}
if !found {
filers = append(filers, self)
}
f.MetaAggregator = NewMetaAggregator(filers, f.GrpcDialOption)
f.MetaAggregator.StartLoopSubscribe(f, self)
}
func (f *Filer) SetStore(store FilerStore) {
f.Store = NewFilerStoreWrapper(store)
f.setOrLoadFilerStoreSignature(store)
}
func (f *Filer) setOrLoadFilerStoreSignature(store FilerStore) {
storeIdBytes, err := store.KvGet(context.Background(), []byte(FilerStoreId))
if err == ErrKvNotFound || err == nil && len(storeIdBytes) == 0 {
f.Signature = util.RandomInt32()
storeIdBytes = make([]byte, 4)
util.Uint32toBytes(storeIdBytes, uint32(f.Signature))
if err = store.KvPut(context.Background(), []byte(FilerStoreId), storeIdBytes); err != nil {
glog.Fatalf("set %s=%d : %v", FilerStoreId, f.Signature, err)
}
glog.V(0).Infof("create %s to %d", FilerStoreId, f.Signature)
} else if err == nil && len(storeIdBytes) == 4 {
f.Signature = int32(util.BytesToUint32(storeIdBytes))
glog.V(0).Infof("existing %s = %d", FilerStoreId, f.Signature)
} else {
glog.Fatalf("read %v=%v : %v", FilerStoreId, string(storeIdBytes), err)
}
}
func (f *Filer) GetStore() (store FilerStore) {
return f.Store
}
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, isFromOtherCluster bool, signatures []int32) error {
if string(entry.FullPath) == "/" {
return nil
}
oldEntry, _ := f.FindEntry(ctx, 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)
}
*/
if oldEntry == nil {
dirParts := strings.Split(string(entry.FullPath), "/")
if err := f.ensureParentDirecotryEntry(ctx, entry, dirParts, len(dirParts)-1, isFromOtherCluster); err != nil {
return err
}
glog.V(4).Infof("InsertEntry %s: new entry: %v", entry.FullPath, entry.Name())
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)
}
glog.V(4).Infof("UpdateEntry %s: old entry: %v", entry.FullPath, oldEntry.Name())
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.maybeAddBucket(entry)
f.NotifyUpdateEvent(ctx, oldEntry, entry, true, isFromOtherCluster, signatures)
f.deleteChunksIfNotNew(oldEntry, entry)
glog.V(4).Infof("CreateEntry %s: created", entry.FullPath)
return nil
}
func (f *Filer) ensureParentDirecotryEntry(ctx context.Context, entry *Entry, dirParts []string, level int, isFromOtherCluster bool) (err error) {
if level == 0 {
return nil
}
dirPath := "/" + util.Join(dirParts[:level]...)
// fmt.Printf("%d directory: %+v\n", i, dirPath)
// check the store directly
glog.V(4).Infof("find uncached directory: %s", dirPath)
dirEntry, _ := f.FindEntry(ctx, util.FullPath(dirPath))
// no such existing directory
if dirEntry == nil {
// ensure parent directory
if err = f.ensureParentDirecotryEntry(ctx, entry, dirParts, level-1, isFromOtherCluster); err != nil {
return err
}
// create the directory
now := time.Now()
dirEntry = &Entry{
FullPath: util.FullPath(dirPath),
Attr: Attr{
Mtime: now,
Crtime: now,
Mode: os.ModeDir | entry.Mode | 0110,
Uid: entry.Uid,
Gid: entry.Gid,
Collection: entry.Collection,
Replication: entry.Replication,
UserName: entry.UserName,
GroupNames: entry.GroupNames,
},
}
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, util.FullPath(dirPath)); err == filer_pb.ErrNotFound {
glog.V(3).Infof("mkdir %s: %v", dirPath, mkdirErr)
return fmt.Errorf("mkdir %s: %v", dirPath, mkdirErr)
}
} else {
f.maybeAddBucket(dirEntry)
f.NotifyUpdateEvent(ctx, nil, dirEntry, false, isFromOtherCluster, nil)
}
} else if !dirEntry.IsDirectory() {
glog.Errorf("CreateEntry %s: %s should be a directory", entry.FullPath, dirPath)
return fmt.Errorf("%s is a file", dirPath)
}
return nil
}
func (f *Filer) UpdateEntry(ctx context.Context, oldEntry, entry *Entry) (err error) {
if oldEntry != nil {
entry.Attr.Crtime = oldEntry.Attr.Crtime
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)
}
var (
Root = &Entry{
FullPath: "/",
Attr: Attr{
Mtime: time.Now(),
Crtime: time.Now(),
Mode: os.ModeDir | 0755,
Uid: OS_UID,
Gid: OS_GID,
},
}
)
func (f *Filer) FindEntry(ctx context.Context, p util.FullPath) (entry *Entry, err error) {
if string(p) == "/" {
return Root, nil
}
entry, err = f.Store.FindEntry(ctx, p)
if entry != nil && entry.TtlSec > 0 {
if entry.Crtime.Add(time.Duration(entry.TtlSec) * time.Second).Before(time.Now()) {
f.Store.DeleteOneEntry(ctx, entry)
return nil, filer_pb.ErrNotFound
}
}
return
}
func (f *Filer) doListDirectoryEntries(ctx context.Context, p util.FullPath, startFileName string, inclusive bool, limit int64, prefix string, eachEntryFunc ListEachEntryFunc) (expiredCount int64, lastFileName string, err error) {
lastFileName, err = f.Store.ListDirectoryPrefixedEntries(ctx, p, startFileName, inclusive, limit, prefix, func(entry *Entry) bool {
if entry.TtlSec > 0 {
if entry.Crtime.Add(time.Duration(entry.TtlSec) * time.Second).Before(time.Now()) {
f.Store.DeleteOneEntry(ctx, entry)
expiredCount++
return true
}
}
return eachEntryFunc(entry)
})
if err != nil {
return expiredCount, lastFileName, err
}
return
}
func (f *Filer) Shutdown() {
f.LocalMetaLogBuffer.Shutdown()
f.Store.Shutdown()
}
|
