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1393 lines
42 KiB
1393 lines
42 KiB
/*
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* MinIO Cloud Storage, (C) 2016, 2017, 2018 MinIO, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package cmd
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import (
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"bytes"
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"context"
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"encoding/json"
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"fmt"
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"io"
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"io/ioutil"
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"net/http"
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"os"
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"os/user"
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"path"
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"sort"
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"strings"
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"sync"
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"sync/atomic"
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"time"
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jsoniter "github.com/json-iterator/go"
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"github.com/minio/minio-go/v6/pkg/s3utils"
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"github.com/minio/minio-go/v6/pkg/tags"
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"github.com/minio/minio/cmd/config"
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xhttp "github.com/minio/minio/cmd/http"
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"github.com/minio/minio/cmd/logger"
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"github.com/minio/minio/pkg/color"
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"github.com/minio/minio/pkg/lock"
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"github.com/minio/minio/pkg/madmin"
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"github.com/minio/minio/pkg/mimedb"
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"github.com/minio/minio/pkg/mountinfo"
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)
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// Default etag is used for pre-existing objects.
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var defaultEtag = "00000000000000000000000000000000-1"
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// FSObjects - Implements fs object layer.
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type FSObjects struct {
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GatewayUnsupported
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// Disk usage metrics
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totalUsed uint64 // ref: https://golang.org/pkg/sync/atomic/#pkg-note-BUG
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// The count of concurrent calls on FSObjects API
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activeIOCount int64
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// The active IO count ceiling for crawling to work
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maxActiveIOCount int64
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// Path to be exported over S3 API.
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fsPath string
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// meta json filename, varies by fs / cache backend.
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metaJSONFile string
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// Unique value to be used for all
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// temporary transactions.
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fsUUID string
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// This value shouldn't be touched, once initialized.
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fsFormatRlk *lock.RLockedFile // Is a read lock on `format.json`.
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// FS rw pool.
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rwPool *fsIOPool
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// ListObjects pool management.
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listPool *TreeWalkPool
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diskMount bool
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appendFileMap map[string]*fsAppendFile
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appendFileMapMu sync.Mutex
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// To manage the appendRoutine go-routines
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nsMutex *nsLockMap
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}
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// Represents the background append file.
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type fsAppendFile struct {
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sync.Mutex
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parts []PartInfo // List of parts appended.
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filePath string // Absolute path of the file in the temp location.
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}
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// Initializes meta volume on all the fs path.
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func initMetaVolumeFS(fsPath, fsUUID string) error {
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// This happens for the first time, but keep this here since this
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// is the only place where it can be made less expensive
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// optimizing all other calls. Create minio meta volume,
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// if it doesn't exist yet.
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metaBucketPath := pathJoin(fsPath, minioMetaBucket)
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if err := os.MkdirAll(metaBucketPath, 0777); err != nil {
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return err
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}
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metaTmpPath := pathJoin(fsPath, minioMetaTmpBucket, fsUUID)
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if err := os.MkdirAll(metaTmpPath, 0777); err != nil {
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return err
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}
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if err := os.MkdirAll(pathJoin(fsPath, dataUsageBucket), 0777); err != nil {
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return err
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}
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metaMultipartPath := pathJoin(fsPath, minioMetaMultipartBucket)
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return os.MkdirAll(metaMultipartPath, 0777)
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}
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// NewFSObjectLayer - initialize new fs object layer.
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func NewFSObjectLayer(fsPath string) (ObjectLayer, error) {
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ctx := GlobalContext
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if fsPath == "" {
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return nil, errInvalidArgument
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}
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var err error
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if fsPath, err = getValidPath(fsPath, false); err != nil {
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if err == errMinDiskSize {
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return nil, config.ErrUnableToWriteInBackend(err).Hint(err.Error())
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}
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// Show a descriptive error with a hint about how to fix it.
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var username string
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if u, err := user.Current(); err == nil {
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username = u.Username
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} else {
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username = "<your-username>"
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}
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hint := fmt.Sprintf("Use 'sudo chown %s %s && sudo chmod u+rxw %s' to provide sufficient permissions.", username, fsPath, fsPath)
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return nil, config.ErrUnableToWriteInBackend(err).Hint(hint)
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}
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// Assign a new UUID for FS minio mode. Each server instance
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// gets its own UUID for temporary file transaction.
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fsUUID := mustGetUUID()
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// Initialize meta volume, if volume already exists ignores it.
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if err = initMetaVolumeFS(fsPath, fsUUID); err != nil {
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return nil, err
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}
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// Initialize `format.json`, this function also returns.
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rlk, err := initFormatFS(ctx, fsPath)
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if err != nil {
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return nil, err
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}
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// Initialize fs objects.
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fs := &FSObjects{
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fsPath: fsPath,
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metaJSONFile: fsMetaJSONFile,
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fsUUID: fsUUID,
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rwPool: &fsIOPool{
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readersMap: make(map[string]*lock.RLockedFile),
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},
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nsMutex: newNSLock(false),
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listPool: NewTreeWalkPool(globalLookupTimeout),
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appendFileMap: make(map[string]*fsAppendFile),
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diskMount: mountinfo.IsLikelyMountPoint(fsPath),
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maxActiveIOCount: 10,
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}
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// Once the filesystem has initialized hold the read lock for
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// the life time of the server. This is done to ensure that under
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// shared backend mode for FS, remote servers do not migrate
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// or cause changes on backend format.
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fs.fsFormatRlk = rlk
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go fs.cleanupStaleMultipartUploads(ctx, GlobalMultipartCleanupInterval, GlobalMultipartExpiry)
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go intDataUpdateTracker.start(GlobalContext, fsPath)
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// Return successfully initialized object layer.
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return fs, nil
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}
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// NewNSLock - initialize a new namespace RWLocker instance.
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func (fs *FSObjects) NewNSLock(ctx context.Context, bucket string, objects ...string) RWLocker {
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// lockers are explicitly 'nil' for FS mode since there are only local lockers
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return fs.nsMutex.NewNSLock(ctx, nil, bucket, objects...)
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}
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// Shutdown - should be called when process shuts down.
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func (fs *FSObjects) Shutdown(ctx context.Context) error {
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fs.fsFormatRlk.Close()
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// Cleanup and delete tmp uuid.
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return fsRemoveAll(ctx, pathJoin(fs.fsPath, minioMetaTmpBucket, fs.fsUUID))
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}
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// StorageInfo - returns underlying storage statistics.
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func (fs *FSObjects) StorageInfo(ctx context.Context, _ bool) StorageInfo {
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atomic.AddInt64(&fs.activeIOCount, 1)
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defer func() {
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atomic.AddInt64(&fs.activeIOCount, -1)
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}()
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di, err := getDiskInfo(fs.fsPath)
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if err != nil {
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return StorageInfo{}
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}
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used := di.Total - di.Free
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if !fs.diskMount {
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used = atomic.LoadUint64(&fs.totalUsed)
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}
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storageInfo := StorageInfo{
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Used: []uint64{used},
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Total: []uint64{di.Total},
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Available: []uint64{di.Free},
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MountPaths: []string{fs.fsPath},
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}
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storageInfo.Backend.Type = BackendFS
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return storageInfo
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}
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func (fs *FSObjects) waitForLowActiveIO() {
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for atomic.LoadInt64(&fs.activeIOCount) >= fs.maxActiveIOCount {
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time.Sleep(lowActiveIOWaitTick)
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}
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}
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// CrawlAndGetDataUsage returns data usage stats of the current FS deployment
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func (fs *FSObjects) CrawlAndGetDataUsage(ctx context.Context, bf *bloomFilter, updates chan<- DataUsageInfo) error {
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// Load bucket totals
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var oldCache dataUsageCache
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err := oldCache.load(ctx, fs, dataUsageCacheName)
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if err != nil {
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return err
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}
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if oldCache.Info.Name == "" {
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oldCache.Info.Name = dataUsageRoot
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}
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buckets, err := fs.ListBuckets(ctx)
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if err != nil {
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return err
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}
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oldCache.Info.BloomFilter = nil
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if bf != nil {
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oldCache.Info.BloomFilter = bf.bytes()
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}
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if false && intDataUpdateTracker.debug {
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b, _ := json.MarshalIndent(bf, "", " ")
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logger.Info("Bloom filter: %v", string(b))
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}
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cache, err := updateUsage(ctx, fs.fsPath, oldCache, fs.waitForLowActiveIO, func(item Item) (int64, error) {
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bucket, object := path2BucketObject(strings.TrimPrefix(item.Path, fs.fsPath))
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fsMetaBytes, err := ioutil.ReadFile(pathJoin(fs.fsPath, minioMetaBucket, bucketMetaPrefix, bucket, object, fs.metaJSONFile))
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if err != nil && !os.IsNotExist(err) {
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return 0, errSkipFile
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}
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// Get file size, symlinks which cannot be
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// followed are automatically filtered by fastwalk.
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fi, err := os.Stat(item.Path)
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if err != nil {
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return 0, errSkipFile
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}
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if len(fsMetaBytes) > 0 {
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fsMeta := newFSMetaV1()
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var json = jsoniter.ConfigCompatibleWithStandardLibrary
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if err = json.Unmarshal(fsMetaBytes, &fsMeta); err != nil {
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return 0, errSkipFile
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}
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return fsMeta.ToObjectInfo(bucket, object, fi).GetActualSize()
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}
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return fi.Size(), nil
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})
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cache.Info.BloomFilter = nil
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// Even if there was an error, the new cache may have better info.
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if cache.Info.LastUpdate.After(oldCache.Info.LastUpdate) {
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if intDataUpdateTracker.debug {
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logger.Info(color.Green("CrawlAndGetDataUsage:")+" Saving cache with %d entries", len(cache.Cache))
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}
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logger.LogIf(ctx, cache.save(ctx, fs, dataUsageCacheName))
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updates <- cache.dui(dataUsageRoot, buckets)
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} else {
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if intDataUpdateTracker.debug {
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logger.Info(color.Green("CrawlAndGetDataUsage:")+" Cache not updated, %d entries", len(cache.Cache))
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}
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}
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return err
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}
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/// Bucket operations
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// getBucketDir - will convert incoming bucket names to
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// corresponding valid bucket names on the backend in a platform
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// compatible way for all operating systems.
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func (fs *FSObjects) getBucketDir(ctx context.Context, bucket string) (string, error) {
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if bucket == "" || bucket == "." || bucket == ".." {
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return "", errVolumeNotFound
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}
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bucketDir := pathJoin(fs.fsPath, bucket)
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return bucketDir, nil
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}
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func (fs *FSObjects) statBucketDir(ctx context.Context, bucket string) (os.FileInfo, error) {
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bucketDir, err := fs.getBucketDir(ctx, bucket)
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if err != nil {
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return nil, err
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}
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st, err := fsStatVolume(ctx, bucketDir)
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if err != nil {
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return nil, err
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}
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return st, nil
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}
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// MakeBucketWithLocation - create a new bucket, returns if it
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// already exists.
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func (fs *FSObjects) MakeBucketWithLocation(ctx context.Context, bucket, location string, lockEnabled bool) error {
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if lockEnabled {
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return NotImplemented{}
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}
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// Verify if bucket is valid.
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if s3utils.CheckValidBucketNameStrict(bucket) != nil {
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return BucketNameInvalid{Bucket: bucket}
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}
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atomic.AddInt64(&fs.activeIOCount, 1)
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defer func() {
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atomic.AddInt64(&fs.activeIOCount, -1)
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}()
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bucketDir, err := fs.getBucketDir(ctx, bucket)
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if err != nil {
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return toObjectErr(err, bucket)
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}
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if err = fsMkdir(ctx, bucketDir); err != nil {
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return toObjectErr(err, bucket)
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}
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meta := newBucketMetadata(bucket)
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if err := meta.Save(ctx, fs); err != nil {
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return toObjectErr(err, bucket)
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}
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globalBucketMetadataSys.Set(bucket, meta)
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return nil
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}
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// GetBucketInfo - fetch bucket metadata info.
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func (fs *FSObjects) GetBucketInfo(ctx context.Context, bucket string) (bi BucketInfo, e error) {
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atomic.AddInt64(&fs.activeIOCount, 1)
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defer func() {
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atomic.AddInt64(&fs.activeIOCount, -1)
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}()
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st, err := fs.statBucketDir(ctx, bucket)
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if err != nil {
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return bi, toObjectErr(err, bucket)
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}
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createdTime := st.ModTime()
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meta, err := globalBucketMetadataSys.Get(bucket)
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if err == nil {
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createdTime = meta.Created
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}
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return BucketInfo{
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Name: bucket,
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Created: createdTime,
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}, nil
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}
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// ListBuckets - list all s3 compatible buckets (directories) at fsPath.
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func (fs *FSObjects) ListBuckets(ctx context.Context) ([]BucketInfo, error) {
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if err := checkPathLength(fs.fsPath); err != nil {
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logger.LogIf(ctx, err)
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return nil, err
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}
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atomic.AddInt64(&fs.activeIOCount, 1)
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defer func() {
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atomic.AddInt64(&fs.activeIOCount, -1)
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}()
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var bucketInfos []BucketInfo
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entries, err := readDir(fs.fsPath)
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if err != nil {
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logger.LogIf(ctx, errDiskNotFound)
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return nil, toObjectErr(errDiskNotFound)
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}
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for _, entry := range entries {
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// Ignore all reserved bucket names and invalid bucket names.
|
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if isReservedOrInvalidBucket(entry, false) {
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continue
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}
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var fi os.FileInfo
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fi, err = fsStatVolume(ctx, pathJoin(fs.fsPath, entry))
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// There seems like no practical reason to check for errors
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// at this point, if there are indeed errors we can simply
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// just ignore such buckets and list only those which
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// return proper Stat information instead.
|
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if err != nil {
|
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// Ignore any errors returned here.
|
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continue
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}
|
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var created = fi.ModTime()
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meta, err := globalBucketMetadataSys.Get(fi.Name())
|
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if err == nil {
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created = meta.Created
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}
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|
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bucketInfos = append(bucketInfos, BucketInfo{
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Name: fi.Name(),
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Created: created,
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})
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}
|
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|
|
// Sort bucket infos by bucket name.
|
|
sort.Sort(byBucketName(bucketInfos))
|
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|
|
// Succes.
|
|
return bucketInfos, nil
|
|
}
|
|
|
|
// DeleteBucket - delete a bucket and all the metadata associated
|
|
// with the bucket including pending multipart, object metadata.
|
|
func (fs *FSObjects) DeleteBucket(ctx context.Context, bucket string, forceDelete bool) error {
|
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atomic.AddInt64(&fs.activeIOCount, 1)
|
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defer func() {
|
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atomic.AddInt64(&fs.activeIOCount, -1)
|
|
}()
|
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|
|
bucketDir, err := fs.getBucketDir(ctx, bucket)
|
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if err != nil {
|
|
return toObjectErr(err, bucket)
|
|
}
|
|
|
|
if !forceDelete {
|
|
// Attempt to delete regular bucket.
|
|
if err = fsRemoveDir(ctx, bucketDir); err != nil {
|
|
return toObjectErr(err, bucket)
|
|
}
|
|
} else {
|
|
tmpBucketPath := pathJoin(fs.fsPath, minioMetaTmpBucket, bucket+"."+mustGetUUID())
|
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if err = fsSimpleRenameFile(ctx, bucketDir, tmpBucketPath); err != nil {
|
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return toObjectErr(err, bucket)
|
|
}
|
|
|
|
go func() {
|
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fsRemoveAll(ctx, tmpBucketPath) // ignore returned error if any.
|
|
}()
|
|
}
|
|
|
|
// Cleanup all the bucket metadata.
|
|
minioMetadataBucketDir := pathJoin(fs.fsPath, minioMetaBucket, bucketMetaPrefix, bucket)
|
|
if err = fsRemoveAll(ctx, minioMetadataBucketDir); err != nil {
|
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return toObjectErr(err, bucket)
|
|
}
|
|
|
|
// Delete all bucket metadata.
|
|
deleteBucketMetadata(ctx, fs, bucket)
|
|
|
|
return nil
|
|
}
|
|
|
|
/// Object Operations
|
|
|
|
// CopyObject - copy object source object to destination object.
|
|
// if source object and destination object are same we only
|
|
// update metadata.
|
|
func (fs *FSObjects) CopyObject(ctx context.Context, srcBucket, srcObject, dstBucket, dstObject string, srcInfo ObjectInfo, srcOpts, dstOpts ObjectOptions) (oi ObjectInfo, e error) {
|
|
cpSrcDstSame := isStringEqual(pathJoin(srcBucket, srcObject), pathJoin(dstBucket, dstObject))
|
|
defer ObjectPathUpdated(path.Join(dstBucket, dstObject))
|
|
|
|
if !cpSrcDstSame {
|
|
objectDWLock := fs.NewNSLock(ctx, dstBucket, dstObject)
|
|
if err := objectDWLock.GetLock(globalObjectTimeout); err != nil {
|
|
return oi, err
|
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}
|
|
defer objectDWLock.Unlock()
|
|
}
|
|
|
|
atomic.AddInt64(&fs.activeIOCount, 1)
|
|
defer func() {
|
|
atomic.AddInt64(&fs.activeIOCount, -1)
|
|
}()
|
|
|
|
if _, err := fs.statBucketDir(ctx, srcBucket); err != nil {
|
|
return oi, toObjectErr(err, srcBucket)
|
|
}
|
|
|
|
if cpSrcDstSame && srcInfo.metadataOnly {
|
|
fsMetaPath := pathJoin(fs.fsPath, minioMetaBucket, bucketMetaPrefix, srcBucket, srcObject, fs.metaJSONFile)
|
|
wlk, err := fs.rwPool.Write(fsMetaPath)
|
|
if err != nil {
|
|
logger.LogIf(ctx, err)
|
|
return oi, toObjectErr(err, srcBucket, srcObject)
|
|
}
|
|
// This close will allow for locks to be synchronized on `fs.json`.
|
|
defer wlk.Close()
|
|
|
|
// Save objects' metadata in `fs.json`.
|
|
fsMeta := newFSMetaV1()
|
|
if _, err = fsMeta.ReadFrom(ctx, wlk); err != nil {
|
|
// For any error to read fsMeta, set default ETag and proceed.
|
|
fsMeta = fs.defaultFsJSON(srcObject)
|
|
}
|
|
|
|
fsMeta.Meta = srcInfo.UserDefined
|
|
fsMeta.Meta["etag"] = srcInfo.ETag
|
|
if _, err = fsMeta.WriteTo(wlk); err != nil {
|
|
return oi, toObjectErr(err, srcBucket, srcObject)
|
|
}
|
|
|
|
// Stat the file to get file size.
|
|
fi, err := fsStatFile(ctx, pathJoin(fs.fsPath, srcBucket, srcObject))
|
|
if err != nil {
|
|
return oi, toObjectErr(err, srcBucket, srcObject)
|
|
}
|
|
|
|
// Return the new object info.
|
|
return fsMeta.ToObjectInfo(srcBucket, srcObject, fi), nil
|
|
}
|
|
|
|
if err := checkPutObjectArgs(ctx, dstBucket, dstObject, fs, srcInfo.PutObjReader.Size()); err != nil {
|
|
return ObjectInfo{}, err
|
|
}
|
|
|
|
objInfo, err := fs.putObject(ctx, dstBucket, dstObject, srcInfo.PutObjReader, ObjectOptions{ServerSideEncryption: dstOpts.ServerSideEncryption, UserDefined: srcInfo.UserDefined})
|
|
if err != nil {
|
|
return oi, toObjectErr(err, dstBucket, dstObject)
|
|
}
|
|
|
|
return objInfo, nil
|
|
}
|
|
|
|
// GetObjectNInfo - returns object info and a reader for object
|
|
// content.
|
|
func (fs *FSObjects) GetObjectNInfo(ctx context.Context, bucket, object string, rs *HTTPRangeSpec, h http.Header, lockType LockType, opts ObjectOptions) (gr *GetObjectReader, err error) {
|
|
if err = checkGetObjArgs(ctx, bucket, object); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
atomic.AddInt64(&fs.activeIOCount, 1)
|
|
defer func() {
|
|
atomic.AddInt64(&fs.activeIOCount, -1)
|
|
}()
|
|
|
|
if _, err = fs.statBucketDir(ctx, bucket); err != nil {
|
|
return nil, toObjectErr(err, bucket)
|
|
}
|
|
|
|
var nsUnlocker = func() {}
|
|
|
|
if lockType != noLock {
|
|
// Lock the object before reading.
|
|
lock := fs.NewNSLock(ctx, bucket, object)
|
|
switch lockType {
|
|
case writeLock:
|
|
if err = lock.GetLock(globalObjectTimeout); err != nil {
|
|
logger.LogIf(ctx, err)
|
|
return nil, err
|
|
}
|
|
nsUnlocker = lock.Unlock
|
|
case readLock:
|
|
if err = lock.GetRLock(globalObjectTimeout); err != nil {
|
|
logger.LogIf(ctx, err)
|
|
return nil, err
|
|
}
|
|
nsUnlocker = lock.RUnlock
|
|
}
|
|
}
|
|
|
|
// Otherwise we get the object info
|
|
var objInfo ObjectInfo
|
|
if objInfo, err = fs.getObjectInfo(ctx, bucket, object); err != nil {
|
|
nsUnlocker()
|
|
return nil, toObjectErr(err, bucket, object)
|
|
}
|
|
// For a directory, we need to send an reader that returns no bytes.
|
|
if HasSuffix(object, SlashSeparator) {
|
|
// The lock taken above is released when
|
|
// objReader.Close() is called by the caller.
|
|
return NewGetObjectReaderFromReader(bytes.NewBuffer(nil), objInfo, opts, nsUnlocker)
|
|
}
|
|
// Take a rwPool lock for NFS gateway type deployment
|
|
rwPoolUnlocker := func() {}
|
|
if bucket != minioMetaBucket && lockType != noLock {
|
|
fsMetaPath := pathJoin(fs.fsPath, minioMetaBucket, bucketMetaPrefix, bucket, object, fs.metaJSONFile)
|
|
_, err = fs.rwPool.Open(fsMetaPath)
|
|
if err != nil && err != errFileNotFound {
|
|
logger.LogIf(ctx, err)
|
|
nsUnlocker()
|
|
return nil, toObjectErr(err, bucket, object)
|
|
}
|
|
// Need to clean up lock after getObject is
|
|
// completed.
|
|
rwPoolUnlocker = func() { fs.rwPool.Close(fsMetaPath) }
|
|
}
|
|
|
|
objReaderFn, off, length, rErr := NewGetObjectReader(rs, objInfo, opts, nsUnlocker, rwPoolUnlocker)
|
|
if rErr != nil {
|
|
return nil, rErr
|
|
}
|
|
|
|
// Read the object, doesn't exist returns an s3 compatible error.
|
|
fsObjPath := pathJoin(fs.fsPath, bucket, object)
|
|
readCloser, size, err := fsOpenFile(ctx, fsObjPath, off)
|
|
if err != nil {
|
|
rwPoolUnlocker()
|
|
nsUnlocker()
|
|
return nil, toObjectErr(err, bucket, object)
|
|
}
|
|
reader := io.LimitReader(readCloser, length)
|
|
closeFn := func() {
|
|
readCloser.Close()
|
|
}
|
|
|
|
// Check if range is valid
|
|
if off > size || off+length > size {
|
|
err = InvalidRange{off, length, size}
|
|
logger.LogIf(ctx, err, logger.Application)
|
|
closeFn()
|
|
rwPoolUnlocker()
|
|
nsUnlocker()
|
|
return nil, err
|
|
}
|
|
|
|
return objReaderFn(reader, h, opts.CheckCopyPrecondFn, closeFn)
|
|
}
|
|
|
|
// GetObject - reads an object from the disk.
|
|
// Supports additional parameters like offset and length
|
|
// which are synonymous with HTTP Range requests.
|
|
//
|
|
// startOffset indicates the starting read location of the object.
|
|
// length indicates the total length of the object.
|
|
func (fs *FSObjects) GetObject(ctx context.Context, bucket, object string, offset int64, length int64, writer io.Writer, etag string, opts ObjectOptions) (err error) {
|
|
if err = checkGetObjArgs(ctx, bucket, object); err != nil {
|
|
return err
|
|
}
|
|
|
|
// Lock the object before reading.
|
|
lk := fs.NewNSLock(ctx, bucket, object)
|
|
if err := lk.GetRLock(globalObjectTimeout); err != nil {
|
|
logger.LogIf(ctx, err)
|
|
return err
|
|
}
|
|
defer lk.RUnlock()
|
|
|
|
atomic.AddInt64(&fs.activeIOCount, 1)
|
|
defer func() {
|
|
atomic.AddInt64(&fs.activeIOCount, -1)
|
|
}()
|
|
|
|
return fs.getObject(ctx, bucket, object, offset, length, writer, etag, true)
|
|
}
|
|
|
|
// getObject - wrapper for GetObject
|
|
func (fs *FSObjects) getObject(ctx context.Context, bucket, object string, offset int64, length int64, writer io.Writer, etag string, lock bool) (err error) {
|
|
if _, err = fs.statBucketDir(ctx, bucket); err != nil {
|
|
return toObjectErr(err, bucket)
|
|
}
|
|
|
|
// Offset cannot be negative.
|
|
if offset < 0 {
|
|
logger.LogIf(ctx, errUnexpected, logger.Application)
|
|
return toObjectErr(errUnexpected, bucket, object)
|
|
}
|
|
|
|
// Writer cannot be nil.
|
|
if writer == nil {
|
|
logger.LogIf(ctx, errUnexpected, logger.Application)
|
|
return toObjectErr(errUnexpected, bucket, object)
|
|
}
|
|
|
|
// If its a directory request, we return an empty body.
|
|
if HasSuffix(object, SlashSeparator) {
|
|
_, err = writer.Write([]byte(""))
|
|
logger.LogIf(ctx, err)
|
|
return toObjectErr(err, bucket, object)
|
|
}
|
|
|
|
if bucket != minioMetaBucket {
|
|
fsMetaPath := pathJoin(fs.fsPath, minioMetaBucket, bucketMetaPrefix, bucket, object, fs.metaJSONFile)
|
|
if lock {
|
|
_, err = fs.rwPool.Open(fsMetaPath)
|
|
if err != nil && err != errFileNotFound {
|
|
logger.LogIf(ctx, err)
|
|
return toObjectErr(err, bucket, object)
|
|
}
|
|
defer fs.rwPool.Close(fsMetaPath)
|
|
}
|
|
}
|
|
|
|
if etag != "" && etag != defaultEtag {
|
|
objEtag, perr := fs.getObjectETag(ctx, bucket, object, lock)
|
|
if perr != nil {
|
|
return toObjectErr(perr, bucket, object)
|
|
}
|
|
if objEtag != etag {
|
|
logger.LogIf(ctx, InvalidETag{}, logger.Application)
|
|
return toObjectErr(InvalidETag{}, bucket, object)
|
|
}
|
|
}
|
|
|
|
// Read the object, doesn't exist returns an s3 compatible error.
|
|
fsObjPath := pathJoin(fs.fsPath, bucket, object)
|
|
reader, size, err := fsOpenFile(ctx, fsObjPath, offset)
|
|
if err != nil {
|
|
return toObjectErr(err, bucket, object)
|
|
}
|
|
defer reader.Close()
|
|
|
|
bufSize := int64(readSizeV1)
|
|
if length > 0 && bufSize > length {
|
|
bufSize = length
|
|
}
|
|
|
|
// For negative length we read everything.
|
|
if length < 0 {
|
|
length = size - offset
|
|
}
|
|
|
|
// Reply back invalid range if the input offset and length fall out of range.
|
|
if offset > size || offset+length > size {
|
|
err = InvalidRange{offset, length, size}
|
|
logger.LogIf(ctx, err, logger.Application)
|
|
return err
|
|
}
|
|
|
|
// Allocate a staging buffer.
|
|
buf := make([]byte, int(bufSize))
|
|
|
|
_, err = io.CopyBuffer(writer, io.LimitReader(reader, length), buf)
|
|
// The writer will be closed incase of range queries, which will emit ErrClosedPipe.
|
|
if err == io.ErrClosedPipe {
|
|
err = nil
|
|
}
|
|
return toObjectErr(err, bucket, object)
|
|
}
|
|
|
|
// Create a new fs.json file, if the existing one is corrupt. Should happen very rarely.
|
|
func (fs *FSObjects) createFsJSON(object, fsMetaPath string) error {
|
|
fsMeta := newFSMetaV1()
|
|
fsMeta.Meta = make(map[string]string)
|
|
fsMeta.Meta["etag"] = GenETag()
|
|
contentType := mimedb.TypeByExtension(path.Ext(object))
|
|
fsMeta.Meta["content-type"] = contentType
|
|
wlk, werr := fs.rwPool.Create(fsMetaPath)
|
|
if werr == nil {
|
|
_, err := fsMeta.WriteTo(wlk)
|
|
wlk.Close()
|
|
return err
|
|
}
|
|
return werr
|
|
}
|
|
|
|
// Used to return default etag values when a pre-existing object's meta data is queried.
|
|
func (fs *FSObjects) defaultFsJSON(object string) fsMetaV1 {
|
|
fsMeta := newFSMetaV1()
|
|
fsMeta.Meta = make(map[string]string)
|
|
fsMeta.Meta["etag"] = defaultEtag
|
|
contentType := mimedb.TypeByExtension(path.Ext(object))
|
|
fsMeta.Meta["content-type"] = contentType
|
|
return fsMeta
|
|
}
|
|
|
|
// getObjectInfo - wrapper for reading object metadata and constructs ObjectInfo.
|
|
func (fs *FSObjects) getObjectInfo(ctx context.Context, bucket, object string) (oi ObjectInfo, e error) {
|
|
fsMeta := fsMetaV1{}
|
|
if HasSuffix(object, SlashSeparator) {
|
|
fi, err := fsStatDir(ctx, pathJoin(fs.fsPath, bucket, object))
|
|
if err != nil {
|
|
return oi, err
|
|
}
|
|
return fsMeta.ToObjectInfo(bucket, object, fi), nil
|
|
}
|
|
|
|
fsMetaPath := pathJoin(fs.fsPath, minioMetaBucket, bucketMetaPrefix, bucket, object, fs.metaJSONFile)
|
|
// Read `fs.json` to perhaps contend with
|
|
// parallel Put() operations.
|
|
|
|
rlk, err := fs.rwPool.Open(fsMetaPath)
|
|
if err == nil {
|
|
// Read from fs metadata only if it exists.
|
|
_, rerr := fsMeta.ReadFrom(ctx, rlk.LockedFile)
|
|
fs.rwPool.Close(fsMetaPath)
|
|
if rerr != nil {
|
|
// For any error to read fsMeta, set default ETag and proceed.
|
|
fsMeta = fs.defaultFsJSON(object)
|
|
}
|
|
}
|
|
|
|
// Return a default etag and content-type based on the object's extension.
|
|
if err == errFileNotFound {
|
|
fsMeta = fs.defaultFsJSON(object)
|
|
}
|
|
|
|
// Ignore if `fs.json` is not available, this is true for pre-existing data.
|
|
if err != nil && err != errFileNotFound {
|
|
logger.LogIf(ctx, err)
|
|
return oi, err
|
|
}
|
|
|
|
// Stat the file to get file size.
|
|
fi, err := fsStatFile(ctx, pathJoin(fs.fsPath, bucket, object))
|
|
if err != nil {
|
|
return oi, err
|
|
}
|
|
|
|
return fsMeta.ToObjectInfo(bucket, object, fi), nil
|
|
}
|
|
|
|
// getObjectInfoWithLock - reads object metadata and replies back ObjectInfo.
|
|
func (fs *FSObjects) getObjectInfoWithLock(ctx context.Context, bucket, object string) (oi ObjectInfo, e error) {
|
|
// Lock the object before reading.
|
|
lk := fs.NewNSLock(ctx, bucket, object)
|
|
if err := lk.GetRLock(globalObjectTimeout); err != nil {
|
|
return oi, err
|
|
}
|
|
defer lk.RUnlock()
|
|
|
|
if err := checkGetObjArgs(ctx, bucket, object); err != nil {
|
|
return oi, err
|
|
}
|
|
|
|
if _, err := fs.statBucketDir(ctx, bucket); err != nil {
|
|
return oi, err
|
|
}
|
|
|
|
if strings.HasSuffix(object, SlashSeparator) && !fs.isObjectDir(bucket, object) {
|
|
return oi, errFileNotFound
|
|
}
|
|
|
|
return fs.getObjectInfo(ctx, bucket, object)
|
|
}
|
|
|
|
// GetObjectInfo - reads object metadata and replies back ObjectInfo.
|
|
func (fs *FSObjects) GetObjectInfo(ctx context.Context, bucket, object string, opts ObjectOptions) (oi ObjectInfo, e error) {
|
|
|
|
atomic.AddInt64(&fs.activeIOCount, 1)
|
|
defer func() {
|
|
atomic.AddInt64(&fs.activeIOCount, -1)
|
|
}()
|
|
|
|
oi, err := fs.getObjectInfoWithLock(ctx, bucket, object)
|
|
if err == errCorruptedFormat || err == io.EOF {
|
|
lk := fs.NewNSLock(ctx, bucket, object)
|
|
if err = lk.GetLock(globalObjectTimeout); err != nil {
|
|
return oi, toObjectErr(err, bucket, object)
|
|
}
|
|
|
|
fsMetaPath := pathJoin(fs.fsPath, minioMetaBucket, bucketMetaPrefix, bucket, object, fs.metaJSONFile)
|
|
err = fs.createFsJSON(object, fsMetaPath)
|
|
lk.Unlock()
|
|
if err != nil {
|
|
return oi, toObjectErr(err, bucket, object)
|
|
}
|
|
|
|
oi, err = fs.getObjectInfoWithLock(ctx, bucket, object)
|
|
}
|
|
return oi, toObjectErr(err, bucket, object)
|
|
}
|
|
|
|
// This function does the following check, suppose
|
|
// object is "a/b/c/d", stat makes sure that objects ""a/b/c""
|
|
// "a/b" and "a" do not exist.
|
|
func (fs *FSObjects) parentDirIsObject(ctx context.Context, bucket, parent string) bool {
|
|
var isParentDirObject func(string) bool
|
|
isParentDirObject = func(p string) bool {
|
|
if p == "." || p == SlashSeparator {
|
|
return false
|
|
}
|
|
if fsIsFile(ctx, pathJoin(fs.fsPath, bucket, p)) {
|
|
// If there is already a file at prefix "p", return true.
|
|
return true
|
|
}
|
|
|
|
// Check if there is a file as one of the parent paths.
|
|
return isParentDirObject(path.Dir(p))
|
|
}
|
|
return isParentDirObject(parent)
|
|
}
|
|
|
|
// PutObject - creates an object upon reading from the input stream
|
|
// until EOF, writes data directly to configured filesystem path.
|
|
// Additionally writes `fs.json` which carries the necessary metadata
|
|
// for future object operations.
|
|
func (fs *FSObjects) PutObject(ctx context.Context, bucket string, object string, r *PutObjReader, opts ObjectOptions) (objInfo ObjectInfo, retErr error) {
|
|
if err := checkPutObjectArgs(ctx, bucket, object, fs, r.Size()); err != nil {
|
|
return ObjectInfo{}, err
|
|
}
|
|
|
|
// Lock the object.
|
|
lk := fs.NewNSLock(ctx, bucket, object)
|
|
if err := lk.GetLock(globalObjectTimeout); err != nil {
|
|
logger.LogIf(ctx, err)
|
|
return objInfo, err
|
|
}
|
|
defer lk.Unlock()
|
|
defer ObjectPathUpdated(path.Join(bucket, object))
|
|
|
|
atomic.AddInt64(&fs.activeIOCount, 1)
|
|
defer func() {
|
|
atomic.AddInt64(&fs.activeIOCount, -1)
|
|
}()
|
|
|
|
return fs.putObject(ctx, bucket, object, r, opts)
|
|
}
|
|
|
|
// putObject - wrapper for PutObject
|
|
func (fs *FSObjects) putObject(ctx context.Context, bucket string, object string, r *PutObjReader, opts ObjectOptions) (objInfo ObjectInfo, retErr error) {
|
|
data := r.Reader
|
|
|
|
// No metadata is set, allocate a new one.
|
|
meta := make(map[string]string)
|
|
for k, v := range opts.UserDefined {
|
|
meta[k] = v
|
|
}
|
|
var err error
|
|
|
|
// Validate if bucket name is valid and exists.
|
|
if _, err = fs.statBucketDir(ctx, bucket); err != nil {
|
|
return ObjectInfo{}, toObjectErr(err, bucket)
|
|
}
|
|
|
|
fsMeta := newFSMetaV1()
|
|
fsMeta.Meta = meta
|
|
|
|
// This is a special case with size as '0' and object ends
|
|
// with a slash separator, we treat it like a valid operation
|
|
// and return success.
|
|
if isObjectDir(object, data.Size()) {
|
|
// Check if an object is present as one of the parent dir.
|
|
if fs.parentDirIsObject(ctx, bucket, path.Dir(object)) {
|
|
return ObjectInfo{}, toObjectErr(errFileParentIsFile, bucket, object)
|
|
}
|
|
if err = mkdirAll(pathJoin(fs.fsPath, bucket, object), 0777); err != nil {
|
|
logger.LogIf(ctx, err)
|
|
return ObjectInfo{}, toObjectErr(err, bucket, object)
|
|
}
|
|
var fi os.FileInfo
|
|
if fi, err = fsStatDir(ctx, pathJoin(fs.fsPath, bucket, object)); err != nil {
|
|
return ObjectInfo{}, toObjectErr(err, bucket, object)
|
|
}
|
|
return fsMeta.ToObjectInfo(bucket, object, fi), nil
|
|
}
|
|
|
|
// Check if an object is present as one of the parent dir.
|
|
if fs.parentDirIsObject(ctx, bucket, path.Dir(object)) {
|
|
return ObjectInfo{}, toObjectErr(errFileParentIsFile, bucket, object)
|
|
}
|
|
|
|
// Validate input data size and it can never be less than zero.
|
|
if data.Size() < -1 {
|
|
logger.LogIf(ctx, errInvalidArgument, logger.Application)
|
|
return ObjectInfo{}, errInvalidArgument
|
|
}
|
|
|
|
var wlk *lock.LockedFile
|
|
if bucket != minioMetaBucket {
|
|
bucketMetaDir := pathJoin(fs.fsPath, minioMetaBucket, bucketMetaPrefix)
|
|
|
|
fsMetaPath := pathJoin(bucketMetaDir, bucket, object, fs.metaJSONFile)
|
|
wlk, err = fs.rwPool.Create(fsMetaPath)
|
|
if err != nil {
|
|
logger.LogIf(ctx, err)
|
|
return ObjectInfo{}, toObjectErr(err, bucket, object)
|
|
}
|
|
// This close will allow for locks to be synchronized on `fs.json`.
|
|
defer wlk.Close()
|
|
defer func() {
|
|
// Remove meta file when PutObject encounters any error
|
|
if retErr != nil {
|
|
tmpDir := pathJoin(fs.fsPath, minioMetaTmpBucket, fs.fsUUID)
|
|
fsRemoveMeta(ctx, bucketMetaDir, fsMetaPath, tmpDir)
|
|
}
|
|
}()
|
|
}
|
|
|
|
// Uploaded object will first be written to the temporary location which will eventually
|
|
// be renamed to the actual location. It is first written to the temporary location
|
|
// so that cleaning it up will be easy if the server goes down.
|
|
tempObj := mustGetUUID()
|
|
|
|
// Allocate a buffer to Read() from request body
|
|
bufSize := int64(readSizeV1)
|
|
if size := data.Size(); size > 0 && bufSize > size {
|
|
bufSize = size
|
|
}
|
|
|
|
buf := make([]byte, int(bufSize))
|
|
fsTmpObjPath := pathJoin(fs.fsPath, minioMetaTmpBucket, fs.fsUUID, tempObj)
|
|
bytesWritten, err := fsCreateFile(ctx, fsTmpObjPath, data, buf, data.Size())
|
|
if err != nil {
|
|
fsRemoveFile(ctx, fsTmpObjPath)
|
|
return ObjectInfo{}, toObjectErr(err, bucket, object)
|
|
}
|
|
fsMeta.Meta["etag"] = r.MD5CurrentHexString()
|
|
|
|
// Should return IncompleteBody{} error when reader has fewer
|
|
// bytes than specified in request header.
|
|
if bytesWritten < data.Size() {
|
|
fsRemoveFile(ctx, fsTmpObjPath)
|
|
return ObjectInfo{}, IncompleteBody{}
|
|
}
|
|
|
|
// Delete the temporary object in the case of a
|
|
// failure. If PutObject succeeds, then there would be
|
|
// nothing to delete.
|
|
defer fsRemoveFile(ctx, fsTmpObjPath)
|
|
|
|
// Entire object was written to the temp location, now it's safe to rename it to the actual location.
|
|
fsNSObjPath := pathJoin(fs.fsPath, bucket, object)
|
|
if err = fsRenameFile(ctx, fsTmpObjPath, fsNSObjPath); err != nil {
|
|
return ObjectInfo{}, toObjectErr(err, bucket, object)
|
|
}
|
|
|
|
if bucket != minioMetaBucket {
|
|
// Write FS metadata after a successful namespace operation.
|
|
if _, err = fsMeta.WriteTo(wlk); err != nil {
|
|
return ObjectInfo{}, toObjectErr(err, bucket, object)
|
|
}
|
|
}
|
|
|
|
// Stat the file to fetch timestamp, size.
|
|
fi, err := fsStatFile(ctx, pathJoin(fs.fsPath, bucket, object))
|
|
if err != nil {
|
|
return ObjectInfo{}, toObjectErr(err, bucket, object)
|
|
}
|
|
|
|
// Success.
|
|
return fsMeta.ToObjectInfo(bucket, object, fi), nil
|
|
}
|
|
|
|
// DeleteObjects - deletes an object from a bucket, this operation is destructive
|
|
// and there are no rollbacks supported.
|
|
func (fs *FSObjects) DeleteObjects(ctx context.Context, bucket string, objects []string) ([]error, error) {
|
|
errs := make([]error, len(objects))
|
|
for idx, object := range objects {
|
|
errs[idx] = fs.DeleteObject(ctx, bucket, object)
|
|
}
|
|
return errs, nil
|
|
}
|
|
|
|
// DeleteObject - deletes an object from a bucket, this operation is destructive
|
|
// and there are no rollbacks supported.
|
|
func (fs *FSObjects) DeleteObject(ctx context.Context, bucket, object string) error {
|
|
// Acquire a write lock before deleting the object.
|
|
lk := fs.NewNSLock(ctx, bucket, object)
|
|
if err := lk.GetLock(globalOperationTimeout); err != nil {
|
|
return err
|
|
}
|
|
defer lk.Unlock()
|
|
|
|
if err := checkDelObjArgs(ctx, bucket, object); err != nil {
|
|
return err
|
|
}
|
|
|
|
defer ObjectPathUpdated(path.Join(bucket, object))
|
|
|
|
atomic.AddInt64(&fs.activeIOCount, 1)
|
|
defer func() {
|
|
atomic.AddInt64(&fs.activeIOCount, -1)
|
|
}()
|
|
|
|
if _, err := fs.statBucketDir(ctx, bucket); err != nil {
|
|
return toObjectErr(err, bucket)
|
|
}
|
|
|
|
minioMetaBucketDir := pathJoin(fs.fsPath, minioMetaBucket)
|
|
fsMetaPath := pathJoin(minioMetaBucketDir, bucketMetaPrefix, bucket, object, fs.metaJSONFile)
|
|
if bucket != minioMetaBucket {
|
|
rwlk, lerr := fs.rwPool.Write(fsMetaPath)
|
|
if lerr == nil {
|
|
// This close will allow for fs locks to be synchronized on `fs.json`.
|
|
defer rwlk.Close()
|
|
}
|
|
if lerr != nil && lerr != errFileNotFound {
|
|
logger.LogIf(ctx, lerr)
|
|
return toObjectErr(lerr, bucket, object)
|
|
}
|
|
}
|
|
|
|
// Delete the object.
|
|
if err := fsDeleteFile(ctx, pathJoin(fs.fsPath, bucket), pathJoin(fs.fsPath, bucket, object)); err != nil {
|
|
return toObjectErr(err, bucket, object)
|
|
}
|
|
|
|
if bucket != minioMetaBucket {
|
|
// Delete the metadata object.
|
|
err := fsDeleteFile(ctx, minioMetaBucketDir, fsMetaPath)
|
|
if err != nil && err != errFileNotFound {
|
|
return toObjectErr(err, bucket, object)
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// Returns function "listDir" of the type listDirFunc.
|
|
// isLeaf - is used by listDir function to check if an entry
|
|
// is a leaf or non-leaf entry.
|
|
func (fs *FSObjects) listDirFactory() ListDirFunc {
|
|
// listDir - lists all the entries at a given prefix and given entry in the prefix.
|
|
listDir := func(bucket, prefixDir, prefixEntry string) (emptyDir bool, entries []string) {
|
|
var err error
|
|
entries, err = readDir(pathJoin(fs.fsPath, bucket, prefixDir))
|
|
if err != nil && err != errFileNotFound {
|
|
logger.LogIf(GlobalContext, err)
|
|
return false, nil
|
|
}
|
|
if len(entries) == 0 {
|
|
return true, nil
|
|
}
|
|
sort.Strings(entries)
|
|
return false, filterMatchingPrefix(entries, prefixEntry)
|
|
}
|
|
|
|
// Return list factory instance.
|
|
return listDir
|
|
}
|
|
|
|
// isObjectDir returns true if the specified bucket & prefix exists
|
|
// and the prefix represents an empty directory. An S3 empty directory
|
|
// is also an empty directory in the FS backend.
|
|
func (fs *FSObjects) isObjectDir(bucket, prefix string) bool {
|
|
entries, err := readDirN(pathJoin(fs.fsPath, bucket, prefix), 1)
|
|
if err != nil {
|
|
return false
|
|
}
|
|
return len(entries) == 0
|
|
}
|
|
|
|
// getObjectETag is a helper function, which returns only the md5sum
|
|
// of the file on the disk.
|
|
func (fs *FSObjects) getObjectETag(ctx context.Context, bucket, entry string, lock bool) (string, error) {
|
|
fsMetaPath := pathJoin(fs.fsPath, minioMetaBucket, bucketMetaPrefix, bucket, entry, fs.metaJSONFile)
|
|
|
|
var reader io.Reader
|
|
var fi os.FileInfo
|
|
var size int64
|
|
if lock {
|
|
// Read `fs.json` to perhaps contend with
|
|
// parallel Put() operations.
|
|
rlk, err := fs.rwPool.Open(fsMetaPath)
|
|
// Ignore if `fs.json` is not available, this is true for pre-existing data.
|
|
if err != nil && err != errFileNotFound {
|
|
logger.LogIf(ctx, err)
|
|
return "", toObjectErr(err, bucket, entry)
|
|
}
|
|
|
|
// If file is not found, we don't need to proceed forward.
|
|
if err == errFileNotFound {
|
|
return "", nil
|
|
}
|
|
|
|
// Read from fs metadata only if it exists.
|
|
defer fs.rwPool.Close(fsMetaPath)
|
|
|
|
// Fetch the size of the underlying file.
|
|
fi, err = rlk.LockedFile.Stat()
|
|
if err != nil {
|
|
logger.LogIf(ctx, err)
|
|
return "", toObjectErr(err, bucket, entry)
|
|
}
|
|
|
|
size = fi.Size()
|
|
reader = io.NewSectionReader(rlk.LockedFile, 0, fi.Size())
|
|
} else {
|
|
var err error
|
|
reader, size, err = fsOpenFile(ctx, fsMetaPath, 0)
|
|
if err != nil {
|
|
return "", toObjectErr(err, bucket, entry)
|
|
}
|
|
}
|
|
|
|
// `fs.json` can be empty due to previously failed
|
|
// PutObject() transaction, if we arrive at such
|
|
// a situation we just ignore and continue.
|
|
if size == 0 {
|
|
return "", nil
|
|
}
|
|
|
|
fsMetaBuf, err := ioutil.ReadAll(reader)
|
|
if err != nil {
|
|
logger.LogIf(ctx, err)
|
|
return "", toObjectErr(err, bucket, entry)
|
|
}
|
|
|
|
var fsMeta fsMetaV1
|
|
var json = jsoniter.ConfigCompatibleWithStandardLibrary
|
|
if err = json.Unmarshal(fsMetaBuf, &fsMeta); err != nil {
|
|
return "", err
|
|
}
|
|
|
|
// Check if FS metadata is valid, if not return error.
|
|
if !isFSMetaValid(fsMeta.Version) {
|
|
logger.LogIf(ctx, errCorruptedFormat)
|
|
return "", toObjectErr(errCorruptedFormat, bucket, entry)
|
|
}
|
|
|
|
return extractETag(fsMeta.Meta), nil
|
|
}
|
|
|
|
// ListObjects - list all objects at prefix upto maxKeys., optionally delimited by '/'. Maintains the list pool
|
|
// state for future re-entrant list requests.
|
|
func (fs *FSObjects) ListObjects(ctx context.Context, bucket, prefix, marker, delimiter string, maxKeys int) (loi ListObjectsInfo, e error) {
|
|
|
|
atomic.AddInt64(&fs.activeIOCount, 1)
|
|
defer func() {
|
|
atomic.AddInt64(&fs.activeIOCount, -1)
|
|
}()
|
|
|
|
return listObjects(ctx, fs, bucket, prefix, marker, delimiter, maxKeys, fs.listPool,
|
|
fs.listDirFactory(), fs.getObjectInfo, fs.getObjectInfo)
|
|
}
|
|
|
|
// GetObjectTags - get object tags from an existing object
|
|
func (fs *FSObjects) GetObjectTags(ctx context.Context, bucket, object string) (*tags.Tags, error) {
|
|
oi, err := fs.GetObjectInfo(ctx, bucket, object, ObjectOptions{})
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return tags.ParseObjectTags(oi.UserTags)
|
|
}
|
|
|
|
// PutObjectTags - replace or add tags to an existing object
|
|
func (fs *FSObjects) PutObjectTags(ctx context.Context, bucket, object string, tags string) error {
|
|
fsMetaPath := pathJoin(fs.fsPath, minioMetaBucket, bucketMetaPrefix, bucket, object, fs.metaJSONFile)
|
|
fsMeta := fsMetaV1{}
|
|
wlk, err := fs.rwPool.Write(fsMetaPath)
|
|
if err != nil {
|
|
logger.LogIf(ctx, err)
|
|
return toObjectErr(err, bucket, object)
|
|
}
|
|
// This close will allow for locks to be synchronized on `fs.json`.
|
|
defer wlk.Close()
|
|
|
|
// Read objects' metadata in `fs.json`.
|
|
if _, err = fsMeta.ReadFrom(ctx, wlk); err != nil {
|
|
// For any error to read fsMeta, set default ETag and proceed.
|
|
fsMeta = fs.defaultFsJSON(object)
|
|
}
|
|
|
|
// clean fsMeta.Meta of tag key, before updating the new tags
|
|
delete(fsMeta.Meta, xhttp.AmzObjectTagging)
|
|
|
|
// Do not update for empty tags
|
|
if tags != "" {
|
|
fsMeta.Meta[xhttp.AmzObjectTagging] = tags
|
|
}
|
|
|
|
if _, err = fsMeta.WriteTo(wlk); err != nil {
|
|
return toObjectErr(err, bucket, object)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// DeleteObjectTags - delete object tags from an existing object
|
|
func (fs *FSObjects) DeleteObjectTags(ctx context.Context, bucket, object string) error {
|
|
return fs.PutObjectTags(ctx, bucket, object, "")
|
|
}
|
|
|
|
// ReloadFormat - no-op for fs, Valid only for XL.
|
|
func (fs *FSObjects) ReloadFormat(ctx context.Context, dryRun bool) error {
|
|
logger.LogIf(ctx, NotImplemented{})
|
|
return NotImplemented{}
|
|
}
|
|
|
|
// HealFormat - no-op for fs, Valid only for XL.
|
|
func (fs *FSObjects) HealFormat(ctx context.Context, dryRun bool) (madmin.HealResultItem, error) {
|
|
logger.LogIf(ctx, NotImplemented{})
|
|
return madmin.HealResultItem{}, NotImplemented{}
|
|
}
|
|
|
|
// HealObject - no-op for fs. Valid only for XL.
|
|
func (fs *FSObjects) HealObject(ctx context.Context, bucket, object string, opts madmin.HealOpts) (
|
|
res madmin.HealResultItem, err error) {
|
|
logger.LogIf(ctx, NotImplemented{})
|
|
return res, NotImplemented{}
|
|
}
|
|
|
|
// HealBucket - no-op for fs, Valid only for XL.
|
|
func (fs *FSObjects) HealBucket(ctx context.Context, bucket string, dryRun, remove bool) (madmin.HealResultItem,
|
|
error) {
|
|
logger.LogIf(ctx, NotImplemented{})
|
|
return madmin.HealResultItem{}, NotImplemented{}
|
|
}
|
|
|
|
// Walk a bucket, optionally prefix recursively, until we have returned
|
|
// all the content to objectInfo channel, it is callers responsibility
|
|
// to allocate a receive channel for ObjectInfo, upon any unhandled
|
|
// error walker returns error. Optionally if context.Done() is received
|
|
// then Walk() stops the walker.
|
|
func (fs *FSObjects) Walk(ctx context.Context, bucket, prefix string, results chan<- ObjectInfo) error {
|
|
return fsWalk(ctx, fs, bucket, prefix, fs.listDirFactory(), results, fs.getObjectInfo, fs.getObjectInfo)
|
|
}
|
|
|
|
// HealObjects - no-op for fs. Valid only for XL.
|
|
func (fs *FSObjects) HealObjects(ctx context.Context, bucket, prefix string, opts madmin.HealOpts, fn healObjectFn) (e error) {
|
|
logger.LogIf(ctx, NotImplemented{})
|
|
return NotImplemented{}
|
|
}
|
|
|
|
// ListBucketsHeal - list all buckets to be healed. Valid only for XL
|
|
func (fs *FSObjects) ListBucketsHeal(ctx context.Context) ([]BucketInfo, error) {
|
|
logger.LogIf(ctx, NotImplemented{})
|
|
return []BucketInfo{}, NotImplemented{}
|
|
}
|
|
|
|
// GetMetrics - no op
|
|
func (fs *FSObjects) GetMetrics(ctx context.Context) (*Metrics, error) {
|
|
logger.LogIf(ctx, NotImplemented{})
|
|
return &Metrics{}, NotImplemented{}
|
|
}
|
|
|
|
// ListObjectsV2 lists all blobs in bucket filtered by prefix
|
|
func (fs *FSObjects) ListObjectsV2(ctx context.Context, bucket, prefix, continuationToken, delimiter string, maxKeys int, fetchOwner bool, startAfter string) (result ListObjectsV2Info, err error) {
|
|
marker := continuationToken
|
|
if marker == "" {
|
|
marker = startAfter
|
|
}
|
|
|
|
loi, err := fs.ListObjects(ctx, bucket, prefix, marker, delimiter, maxKeys)
|
|
if err != nil {
|
|
return result, err
|
|
}
|
|
|
|
listObjectsV2Info := ListObjectsV2Info{
|
|
IsTruncated: loi.IsTruncated,
|
|
ContinuationToken: continuationToken,
|
|
NextContinuationToken: loi.NextMarker,
|
|
Objects: loi.Objects,
|
|
Prefixes: loi.Prefixes,
|
|
}
|
|
return listObjectsV2Info, err
|
|
}
|
|
|
|
// IsNotificationSupported returns whether bucket notification is applicable for this layer.
|
|
func (fs *FSObjects) IsNotificationSupported() bool {
|
|
return true
|
|
}
|
|
|
|
// IsListenBucketSupported returns whether listen bucket notification is applicable for this layer.
|
|
func (fs *FSObjects) IsListenBucketSupported() bool {
|
|
return true
|
|
}
|
|
|
|
// IsEncryptionSupported returns whether server side encryption is implemented for this layer.
|
|
func (fs *FSObjects) IsEncryptionSupported() bool {
|
|
return true
|
|
}
|
|
|
|
// IsCompressionSupported returns whether compression is applicable for this layer.
|
|
func (fs *FSObjects) IsCompressionSupported() bool {
|
|
return true
|
|
}
|
|
|
|
// IsTaggingSupported returns true, object tagging is supported in fs object layer.
|
|
func (fs *FSObjects) IsTaggingSupported() bool {
|
|
return true
|
|
}
|
|
|
|
// IsReady - Check if the backend disk is ready to accept traffic.
|
|
func (fs *FSObjects) IsReady(_ context.Context) bool {
|
|
if _, err := os.Stat(fs.fsPath); err != nil {
|
|
return false
|
|
}
|
|
|
|
globalObjLayerMutex.RLock()
|
|
res := globalObjectAPI != nil && !globalSafeMode
|
|
globalObjLayerMutex.RUnlock()
|
|
|
|
return res
|
|
}
|
|
|