seaweedfs/weed/filer/filer.go
2020-09-01 21:59:26 -07:00

289 lines
8.1 KiB
Go

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 * 256
)
var (
OS_UID = uint32(os.Getuid())
OS_GID = uint32(os.Getgid())
)
type Filer struct {
Store *FilerStoreWrapper
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
}
func NewFiler(masters []string, grpcDialOption grpc.DialOption,
filerHost string, filerGrpcPort uint32, collection string, replication string, notifyFn func()) *Filer {
f := &Filer{
MasterClient: wdclient.NewMasterClient(grpcDialOption, "filer", filerHost, filerGrpcPort, masters),
fileIdDeletionQueue: util.NewUnboundedQueue(),
GrpcDialOption: grpcDialOption,
Signature: util.RandomInt32(),
}
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
if len(filers) == 0 {
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)
}
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
}
dirParts := strings.Split(string(entry.FullPath), "/")
// fmt.Printf("directory parts: %+v\n", dirParts)
var lastDirectoryEntry *Entry
for i := 1; i < len(dirParts); i++ {
dirPath := "/" + util.Join(dirParts[:i]...)
// 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 {
// 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)
}
// 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 exclusive:%v", entry.FullPath, oldEntry, o_excl)
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.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) 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 util.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
}
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.DeleteEntry(ctx, p.Child(entry.Name()))
return nil, filer_pb.ErrNotFound
}
}
return
}
func (f *Filer) ListDirectoryEntries(ctx context.Context, p util.FullPath, startFileName string, inclusive bool, limit int, prefix string) ([]*Entry, error) {
if strings.HasSuffix(string(p), "/") && len(p) > 1 {
p = p[0 : len(p)-1]
}
var makeupEntries []*Entry
entries, expiredCount, lastFileName, err := f.doListDirectoryEntries(ctx, p, startFileName, inclusive, limit, prefix)
for expiredCount > 0 && err == nil {
makeupEntries, expiredCount, lastFileName, err = f.doListDirectoryEntries(ctx, p, lastFileName, false, expiredCount, prefix)
if err == nil {
entries = append(entries, makeupEntries...)
}
}
return entries, err
}
func (f *Filer) doListDirectoryEntries(ctx context.Context, p util.FullPath, startFileName string, inclusive bool, limit int, prefix string) (entries []*Entry, expiredCount int, lastFileName string, err error) {
listedEntries, listErr := f.Store.ListDirectoryPrefixedEntries(ctx, p, startFileName, inclusive, limit, prefix)
if listErr != nil {
return listedEntries, expiredCount, "", listErr
}
for _, entry := range listedEntries {
lastFileName = entry.Name()
if entry.TtlSec > 0 {
if entry.Crtime.Add(time.Duration(entry.TtlSec) * time.Second).Before(time.Now()) {
f.Store.DeleteEntry(ctx, p.Child(entry.Name()))
expiredCount++
continue
}
}
entries = append(entries, entry)
}
return
}
func (f *Filer) Shutdown() {
f.LocalMetaLogBuffer.Shutdown()
f.Store.Shutdown()
}