minio/cmd/fs-v1.go
Anis Elleuch 20cacc3b04
fs: Update object modtime when metadata is updated (#12818)
Follow S3 behavior of updating object modtime when object metadata is
updated.
2021-07-28 07:36:38 -07:00

1536 lines
46 KiB
Go

// Copyright (c) 2015-2021 MinIO, Inc.
//
// This file is part of MinIO Object Storage stack
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package cmd
import (
"bytes"
"context"
"fmt"
"io"
"io/ioutil"
"net/http"
"os"
"os/user"
"path"
"path/filepath"
"sort"
"strings"
"sync"
"sync/atomic"
"time"
jsoniter "github.com/json-iterator/go"
"github.com/minio/madmin-go"
"github.com/minio/minio-go/v7/pkg/s3utils"
"github.com/minio/minio-go/v7/pkg/tags"
"github.com/minio/minio/internal/color"
"github.com/minio/minio/internal/config"
xhttp "github.com/minio/minio/internal/http"
xioutil "github.com/minio/minio/internal/ioutil"
"github.com/minio/minio/internal/lock"
"github.com/minio/minio/internal/logger"
"github.com/minio/minio/internal/mountinfo"
"github.com/minio/pkg/bucket/policy"
"github.com/minio/pkg/mimedb"
)
// Default etag is used for pre-existing objects.
var defaultEtag = "00000000000000000000000000000000-1"
// FSObjects - Implements fs object layer.
type FSObjects struct {
GatewayUnsupported
// The count of concurrent calls on FSObjects API
activeIOCount int64
// Path to be exported over S3 API.
fsPath string
// meta json filename, varies by fs / cache backend.
metaJSONFile string
// Unique value to be used for all
// temporary transactions.
fsUUID string
// This value shouldn't be touched, once initialized.
fsFormatRlk *lock.RLockedFile // Is a read lock on `format.json`.
// FS rw pool.
rwPool *fsIOPool
// ListObjects pool management.
listPool *TreeWalkPool
diskMount bool
appendFileMap map[string]*fsAppendFile
appendFileMapMu sync.Mutex
// To manage the appendRoutine go-routines
nsMutex *nsLockMap
}
// Represents the background append file.
type fsAppendFile struct {
sync.Mutex
parts []PartInfo // List of parts appended.
filePath string // Absolute path of the file in the temp location.
}
// Initializes meta volume on all the fs path.
func initMetaVolumeFS(fsPath, fsUUID string) error {
// This happens for the first time, but keep this here since this
// is the only place where it can be made less expensive
// optimizing all other calls. Create minio meta volume,
// if it doesn't exist yet.
metaBucketPath := pathJoin(fsPath, minioMetaBucket)
if err := os.MkdirAll(metaBucketPath, 0777); err != nil {
return err
}
metaTmpPath := pathJoin(fsPath, minioMetaTmpBucket, fsUUID)
if err := os.MkdirAll(metaTmpPath, 0777); err != nil {
return err
}
if err := os.MkdirAll(pathJoin(fsPath, dataUsageBucket), 0777); err != nil {
return err
}
metaMultipartPath := pathJoin(fsPath, minioMetaMultipartBucket)
return os.MkdirAll(metaMultipartPath, 0777)
}
// NewFSObjectLayer - initialize new fs object layer.
func NewFSObjectLayer(fsPath string) (ObjectLayer, error) {
ctx := GlobalContext
if fsPath == "" {
return nil, errInvalidArgument
}
var err error
if fsPath, err = getValidPath(fsPath); err != nil {
if err == errMinDiskSize {
return nil, config.ErrUnableToWriteInBackend(err).Hint(err.Error())
}
// Show a descriptive error with a hint about how to fix it.
var username string
if u, err := user.Current(); err == nil {
username = u.Username
} else {
username = "<your-username>"
}
hint := fmt.Sprintf("Use 'sudo chown -R %s %s && sudo chmod u+rxw %s' to provide sufficient permissions.", username, fsPath, fsPath)
return nil, config.ErrUnableToWriteInBackend(err).Hint(hint)
}
// Assign a new UUID for FS minio mode. Each server instance
// gets its own UUID for temporary file transaction.
fsUUID := mustGetUUID()
// Initialize meta volume, if volume already exists ignores it.
if err = initMetaVolumeFS(fsPath, fsUUID); err != nil {
return nil, err
}
// Initialize `format.json`, this function also returns.
rlk, err := initFormatFS(ctx, fsPath)
if err != nil {
return nil, err
}
// Initialize fs objects.
fs := &FSObjects{
fsPath: fsPath,
metaJSONFile: fsMetaJSONFile,
fsUUID: fsUUID,
rwPool: &fsIOPool{
readersMap: make(map[string]*lock.RLockedFile),
},
nsMutex: newNSLock(false),
listPool: NewTreeWalkPool(globalLookupTimeout),
appendFileMap: make(map[string]*fsAppendFile),
diskMount: mountinfo.IsLikelyMountPoint(fsPath),
}
// Once the filesystem has initialized hold the read lock for
// the life time of the server. This is done to ensure that under
// shared backend mode for FS, remote servers do not migrate
// or cause changes on backend format.
fs.fsFormatRlk = rlk
go fs.cleanupStaleUploads(ctx, GlobalStaleUploadsCleanupInterval, GlobalStaleUploadsExpiry)
go intDataUpdateTracker.start(ctx, fsPath)
// Return successfully initialized object layer.
return fs, nil
}
// NewNSLock - initialize a new namespace RWLocker instance.
func (fs *FSObjects) NewNSLock(bucket string, objects ...string) RWLocker {
// lockers are explicitly 'nil' for FS mode since there are only local lockers
return fs.nsMutex.NewNSLock(nil, bucket, objects...)
}
// SetDriveCounts no-op
func (fs *FSObjects) SetDriveCounts() []int {
return nil
}
// Shutdown - should be called when process shuts down.
func (fs *FSObjects) Shutdown(ctx context.Context) error {
fs.fsFormatRlk.Close()
// Cleanup and delete tmp uuid.
return fsRemoveAll(ctx, pathJoin(fs.fsPath, minioMetaTmpBucket, fs.fsUUID))
}
// BackendInfo - returns backend information
func (fs *FSObjects) BackendInfo() madmin.BackendInfo {
return madmin.BackendInfo{Type: madmin.FS}
}
// LocalStorageInfo - returns underlying storage statistics.
func (fs *FSObjects) LocalStorageInfo(ctx context.Context) (StorageInfo, []error) {
return fs.StorageInfo(ctx)
}
// StorageInfo - returns underlying storage statistics.
func (fs *FSObjects) StorageInfo(ctx context.Context) (StorageInfo, []error) {
atomic.AddInt64(&fs.activeIOCount, 1)
defer func() {
atomic.AddInt64(&fs.activeIOCount, -1)
}()
di, err := getDiskInfo(fs.fsPath)
if err != nil {
return StorageInfo{}, []error{err}
}
storageInfo := StorageInfo{
Disks: []madmin.Disk{
{
State: madmin.DriveStateOk,
TotalSpace: di.Total,
UsedSpace: di.Used,
AvailableSpace: di.Free,
DrivePath: fs.fsPath,
},
},
}
storageInfo.Backend.Type = madmin.FS
return storageInfo, nil
}
// NSScanner returns data usage stats of the current FS deployment
func (fs *FSObjects) NSScanner(ctx context.Context, bf *bloomFilter, updates chan<- madmin.DataUsageInfo) error {
defer close(updates)
// Load bucket totals
var totalCache dataUsageCache
err := totalCache.load(ctx, fs, dataUsageCacheName)
if err != nil {
return err
}
totalCache.Info.Name = dataUsageRoot
buckets, err := fs.ListBuckets(ctx)
if err != nil {
return err
}
if len(buckets) == 0 {
totalCache.keepBuckets(buckets)
updates <- totalCache.dui(dataUsageRoot, buckets)
return nil
}
totalCache.Info.BloomFilter = bf.bytes()
// Clear totals.
var root dataUsageEntry
if r := totalCache.root(); r != nil {
root.Children = r.Children
}
totalCache.replace(dataUsageRoot, "", root)
// Delete all buckets that does not exist anymore.
totalCache.keepBuckets(buckets)
for _, b := range buckets {
// Load bucket cache.
var bCache dataUsageCache
err := bCache.load(ctx, fs, path.Join(b.Name, dataUsageCacheName))
if err != nil {
return err
}
if bCache.Info.Name == "" {
bCache.Info.Name = b.Name
}
bCache.Info.BloomFilter = totalCache.Info.BloomFilter
upds := make(chan dataUsageEntry, 1)
var wg sync.WaitGroup
wg.Add(1)
go func() {
defer wg.Done()
for update := range upds {
totalCache.replace(b.Name, dataUsageRoot, update)
if intDataUpdateTracker.debug {
logger.Info(color.Green("NSScanner:")+" Got update:", len(totalCache.Cache))
}
cloned := totalCache.clone()
updates <- cloned.dui(dataUsageRoot, buckets)
}
}()
bCache.Info.updates = upds
cache, err := fs.scanBucket(ctx, b.Name, bCache)
select {
case <-ctx.Done():
return ctx.Err()
default:
}
logger.LogIf(ctx, err)
cache.Info.BloomFilter = nil
wg.Wait()
if cache.root() == nil {
if intDataUpdateTracker.debug {
logger.Info(color.Green("NSScanner:") + " No root added. Adding empty")
}
cache.replace(cache.Info.Name, dataUsageRoot, dataUsageEntry{})
}
if cache.Info.LastUpdate.After(bCache.Info.LastUpdate) {
if intDataUpdateTracker.debug {
logger.Info(color.Green("NSScanner:")+" Saving bucket %q cache with %d entries", b.Name, len(cache.Cache))
}
logger.LogIf(ctx, cache.save(ctx, fs, path.Join(b.Name, dataUsageCacheName)))
}
// Merge, save and send update.
// We do it even if unchanged.
cl := cache.clone()
entry := cl.flatten(*cl.root())
totalCache.replace(cl.Info.Name, dataUsageRoot, entry)
if intDataUpdateTracker.debug {
logger.Info(color.Green("NSScanner:")+" Saving totals cache with %d entries", len(totalCache.Cache))
}
totalCache.Info.LastUpdate = time.Now()
logger.LogIf(ctx, totalCache.save(ctx, fs, dataUsageCacheName))
cloned := totalCache.clone()
updates <- cloned.dui(dataUsageRoot, buckets)
enforceFIFOQuotaBucket(ctx, fs, b.Name, cloned.bucketUsageInfo(b.Name))
}
return nil
}
// scanBucket scans a single bucket in FS mode.
// The updated cache for the bucket is returned.
// A partially updated bucket may be returned.
func (fs *FSObjects) scanBucket(ctx context.Context, bucket string, cache dataUsageCache) (dataUsageCache, error) {
defer close(cache.Info.updates)
// Get bucket policy
// Check if the current bucket has a configured lifecycle policy
lc, err := globalLifecycleSys.Get(bucket)
if err == nil && lc.HasActiveRules("", true) {
if intDataUpdateTracker.debug {
logger.Info(color.Green("scanBucket:") + " lifecycle: Active rules found")
}
cache.Info.lifeCycle = lc
}
// Load bucket info.
cache, err = scanDataFolder(ctx, fs.fsPath, cache, func(item scannerItem) (sizeSummary, error) {
bucket, object := item.bucket, item.objectPath()
fsMetaBytes, err := xioutil.ReadFile(pathJoin(fs.fsPath, minioMetaBucket, bucketMetaPrefix, bucket, object, fs.metaJSONFile))
if err != nil && !osIsNotExist(err) {
if intDataUpdateTracker.debug {
logger.Info(color.Green("scanBucket:")+" object return unexpected error: %v/%v: %w", item.bucket, item.objectPath(), err)
}
return sizeSummary{}, errSkipFile
}
fsMeta := newFSMetaV1()
metaOk := false
if len(fsMetaBytes) > 0 {
var json = jsoniter.ConfigCompatibleWithStandardLibrary
if err = json.Unmarshal(fsMetaBytes, &fsMeta); err == nil {
metaOk = true
}
}
if !metaOk {
fsMeta = fs.defaultFsJSON(object)
}
// Stat the file.
fi, fiErr := os.Stat(item.Path)
if fiErr != nil {
if intDataUpdateTracker.debug {
logger.Info(color.Green("scanBucket:")+" object path missing: %v: %w", item.Path, fiErr)
}
return sizeSummary{}, errSkipFile
}
oi := fsMeta.ToObjectInfo(bucket, object, fi)
sz := item.applyActions(ctx, fs, actionMeta{oi: oi}, &sizeSummary{})
if sz >= 0 {
return sizeSummary{totalSize: sz, versions: 1}, nil
}
return sizeSummary{totalSize: fi.Size(), versions: 1}, nil
})
return cache, err
}
/// Bucket operations
// getBucketDir - will convert incoming bucket names to
// corresponding valid bucket names on the backend in a platform
// compatible way for all operating systems.
func (fs *FSObjects) getBucketDir(ctx context.Context, bucket string) (string, error) {
if bucket == "" || bucket == "." || bucket == ".." {
return "", errVolumeNotFound
}
bucketDir := pathJoin(fs.fsPath, bucket)
return bucketDir, nil
}
func (fs *FSObjects) statBucketDir(ctx context.Context, bucket string) (os.FileInfo, error) {
bucketDir, err := fs.getBucketDir(ctx, bucket)
if err != nil {
return nil, err
}
st, err := fsStatVolume(ctx, bucketDir)
if err != nil {
return nil, err
}
return st, nil
}
// MakeBucketWithLocation - create a new bucket, returns if it already exists.
func (fs *FSObjects) MakeBucketWithLocation(ctx context.Context, bucket string, opts BucketOptions) error {
if opts.LockEnabled || opts.VersioningEnabled {
return NotImplemented{}
}
// Verify if bucket is valid.
if s3utils.CheckValidBucketNameStrict(bucket) != nil {
return BucketNameInvalid{Bucket: bucket}
}
defer NSUpdated(bucket, slashSeparator)
atomic.AddInt64(&fs.activeIOCount, 1)
defer func() {
atomic.AddInt64(&fs.activeIOCount, -1)
}()
bucketDir, err := fs.getBucketDir(ctx, bucket)
if err != nil {
return toObjectErr(err, bucket)
}
if err = fsMkdir(ctx, bucketDir); err != nil {
return toObjectErr(err, bucket)
}
meta := newBucketMetadata(bucket)
if err := meta.Save(ctx, fs); err != nil {
return toObjectErr(err, bucket)
}
globalBucketMetadataSys.Set(bucket, meta)
return nil
}
// GetBucketPolicy - only needed for FS in NAS mode
func (fs *FSObjects) GetBucketPolicy(ctx context.Context, bucket string) (*policy.Policy, error) {
meta, err := loadBucketMetadata(ctx, fs, bucket)
if err != nil {
return nil, BucketPolicyNotFound{Bucket: bucket}
}
if meta.policyConfig == nil {
return nil, BucketPolicyNotFound{Bucket: bucket}
}
return meta.policyConfig, nil
}
// SetBucketPolicy - only needed for FS in NAS mode
func (fs *FSObjects) SetBucketPolicy(ctx context.Context, bucket string, p *policy.Policy) error {
meta, err := loadBucketMetadata(ctx, fs, bucket)
if err != nil {
return err
}
var json = jsoniter.ConfigCompatibleWithStandardLibrary
configData, err := json.Marshal(p)
if err != nil {
return err
}
meta.PolicyConfigJSON = configData
return meta.Save(ctx, fs)
}
// DeleteBucketPolicy - only needed for FS in NAS mode
func (fs *FSObjects) DeleteBucketPolicy(ctx context.Context, bucket string) error {
meta, err := loadBucketMetadata(ctx, fs, bucket)
if err != nil {
return err
}
meta.PolicyConfigJSON = nil
return meta.Save(ctx, fs)
}
// GetBucketInfo - fetch bucket metadata info.
func (fs *FSObjects) GetBucketInfo(ctx context.Context, bucket string) (bi BucketInfo, e error) {
atomic.AddInt64(&fs.activeIOCount, 1)
defer func() {
atomic.AddInt64(&fs.activeIOCount, -1)
}()
st, err := fs.statBucketDir(ctx, bucket)
if err != nil {
return bi, toObjectErr(err, bucket)
}
createdTime := st.ModTime()
meta, err := globalBucketMetadataSys.Get(bucket)
if err == nil {
createdTime = meta.Created
}
return BucketInfo{
Name: bucket,
Created: createdTime,
}, nil
}
// ListBuckets - list all s3 compatible buckets (directories) at fsPath.
func (fs *FSObjects) ListBuckets(ctx context.Context) ([]BucketInfo, error) {
if err := checkPathLength(fs.fsPath); err != nil {
logger.LogIf(ctx, err)
return nil, err
}
atomic.AddInt64(&fs.activeIOCount, 1)
defer func() {
atomic.AddInt64(&fs.activeIOCount, -1)
}()
entries, err := readDirWithOpts(fs.fsPath, readDirOpts{count: -1, followDirSymlink: true})
if err != nil {
logger.LogIf(ctx, errDiskNotFound)
return nil, toObjectErr(errDiskNotFound)
}
bucketInfos := make([]BucketInfo, 0, len(entries))
for _, entry := range entries {
// Ignore all reserved bucket names and invalid bucket names.
if isReservedOrInvalidBucket(entry, false) {
continue
}
var fi os.FileInfo
fi, err = fsStatVolume(ctx, pathJoin(fs.fsPath, entry))
// There seems like no practical reason to check for errors
// at this point, if there are indeed errors we can simply
// just ignore such buckets and list only those which
// return proper Stat information instead.
if err != nil {
// Ignore any errors returned here.
continue
}
var created = fi.ModTime()
meta, err := globalBucketMetadataSys.Get(fi.Name())
if err == nil {
created = meta.Created
}
bucketInfos = append(bucketInfos, BucketInfo{
Name: fi.Name(),
Created: created,
})
}
// Sort bucket infos by bucket name.
sort.Slice(bucketInfos, func(i, j int) bool {
return bucketInfos[i].Name < bucketInfos[j].Name
})
// 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 {
defer NSUpdated(bucket, slashSeparator)
atomic.AddInt64(&fs.activeIOCount, 1)
defer func() {
atomic.AddInt64(&fs.activeIOCount, -1)
}()
bucketDir, err := fs.getBucketDir(ctx, bucket)
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())
if err = fsSimpleRenameFile(ctx, bucketDir, tmpBucketPath); err != nil {
return toObjectErr(err, bucket)
}
go func() {
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 {
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, err error) {
if srcOpts.VersionID != "" && srcOpts.VersionID != nullVersionID {
return oi, VersionNotFound{
Bucket: srcBucket,
Object: srcObject,
VersionID: srcOpts.VersionID,
}
}
cpSrcDstSame := isStringEqual(pathJoin(srcBucket, srcObject), pathJoin(dstBucket, dstObject))
defer NSUpdated(dstBucket, dstObject)
if !cpSrcDstSame {
objectDWLock := fs.NewNSLock(dstBucket, dstObject)
lkctx, err := objectDWLock.GetLock(ctx, globalOperationTimeout)
if err != nil {
return oi, err
}
ctx = lkctx.Context()
defer objectDWLock.Unlock(lkctx.Cancel)
}
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 {
wlk, err = fs.rwPool.Create(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 = cloneMSS(srcInfo.UserDefined)
fsMeta.Meta["etag"] = srcInfo.ETag
if _, err = fsMeta.WriteTo(wlk); err != nil {
return oi, toObjectErr(err, srcBucket, srcObject)
}
fsObjectPath := pathJoin(fs.fsPath, srcBucket, srcObject)
// Update object modtime
err = fsTouch(ctx, fsObjectPath)
if err != nil {
return oi, toObjectErr(err, srcBucket, srcObject)
}
// Stat the file to get object info
fi, err := fsStatFile(ctx, fsObjectPath)
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); 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 opts.VersionID != "" && opts.VersionID != nullVersionID {
return nil, VersionNotFound{
Bucket: bucket,
Object: object,
VersionID: opts.VersionID,
}
}
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(bucket, object)
switch lockType {
case writeLock:
lkctx, err := lock.GetLock(ctx, globalOperationTimeout)
if err != nil {
return nil, err
}
ctx = lkctx.Context()
nsUnlocker = func() { lock.Unlock(lkctx.Cancel) }
case readLock:
lkctx, err := lock.GetRLock(ctx, globalOperationTimeout)
if err != nil {
return nil, err
}
ctx = lkctx.Context()
nsUnlocker = func() { lock.RUnlock(lkctx.Cancel) }
}
}
// 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 return a 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, err := NewGetObjectReader(rs, objInfo, opts)
if err != nil {
rwPoolUnlocker()
nsUnlocker()
return nil, err
}
// 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)
}
closeFn := func() {
readCloser.Close()
}
reader := io.LimitReader(readCloser, length)
// 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, closeFn, rwPoolUnlocker, nsUnlocker)
}
// 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 = map[string]string{
"etag": GenETag(),
"content-type": mimedb.TypeByExtension(path.Ext(object)),
}
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 = map[string]string{
"etag": defaultEtag,
"content-type": mimedb.TypeByExtension(path.Ext(object)),
}
return fsMeta
}
func (fs *FSObjects) getObjectInfoNoFSLock(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.
rc, _, err := fsOpenFile(ctx, fsMetaPath, 0)
if err == nil {
fsMetaBuf, rerr := ioutil.ReadAll(rc)
rc.Close()
if rerr == nil {
var json = jsoniter.ConfigCompatibleWithStandardLibrary
if rerr = json.Unmarshal(fsMetaBuf, &fsMeta); rerr != nil {
// For any error to read fsMeta, set default ETag and proceed.
fsMeta = fs.defaultFsJSON(object)
}
} else {
// 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
}
// getObjectInfo - wrapper for reading object metadata and constructs ObjectInfo.
func (fs *FSObjects) getObjectInfo(ctx context.Context, bucket, object string) (oi ObjectInfo, e error) {
if strings.HasSuffix(object, SlashSeparator) && !fs.isObjectDir(bucket, object) {
return oi, errFileNotFound
}
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, err error) {
// Lock the object before reading.
lk := fs.NewNSLock(bucket, object)
lkctx, err := lk.GetRLock(ctx, globalOperationTimeout)
if err != nil {
return oi, err
}
ctx = lkctx.Context()
defer lk.RUnlock(lkctx.Cancel)
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) {
if opts.VersionID != "" && opts.VersionID != nullVersionID {
return oi, VersionNotFound{
Bucket: bucket,
Object: object,
VersionID: opts.VersionID,
}
}
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(bucket, object)
lkctx, err := lk.GetLock(ctx, globalOperationTimeout)
if 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(lkctx.Cancel)
if err != nil {
return oi, toObjectErr(err, bucket, object)
}
oi, err = fs.getObjectInfoWithLock(ctx, bucket, object)
return oi, toObjectErr(err, 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, err error) {
if opts.Versioned {
return objInfo, NotImplemented{}
}
if err := checkPutObjectArgs(ctx, bucket, object, fs); err != nil {
return ObjectInfo{}, err
}
defer NSUpdated(bucket, object)
// Lock the object.
lk := fs.NewNSLock(bucket, object)
lkctx, err := lk.GetLock(ctx, globalOperationTimeout)
if err != nil {
logger.LogIf(ctx, err)
return objInfo, err
}
ctx = lkctx.Context()
defer lk.Unlock(lkctx.Cancel)
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 := cloneMSS(opts.UserDefined)
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.Write(fsMetaPath)
var freshFile bool
if err != nil {
wlk, err = fs.rwPool.Create(fsMetaPath)
if err != nil {
logger.LogIf(ctx, err)
return ObjectInfo{}, toObjectErr(err, bucket, object)
}
freshFile = true
}
// 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 and it is a fresh file.
//
// We should preserve the `fs.json` of any
// existing object
if retErr != nil && freshFile {
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()
fsTmpObjPath := pathJoin(fs.fsPath, minioMetaTmpBucket, fs.fsUUID, tempObj)
bytesWritten, err := fsCreateFile(ctx, fsTmpObjPath, data, data.Size())
// Delete the temporary object in the case of a
// failure. If PutObject succeeds, then there would be
// nothing to delete.
defer fsRemoveFile(ctx, fsTmpObjPath)
if err != nil {
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() {
return ObjectInfo{}, IncompleteBody{Bucket: bucket, Object: object}
}
// 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 []ObjectToDelete, opts ObjectOptions) ([]DeletedObject, []error) {
errs := make([]error, len(objects))
dobjects := make([]DeletedObject, len(objects))
for idx, object := range objects {
if object.VersionID != "" {
errs[idx] = VersionNotFound{
Bucket: bucket,
Object: object.ObjectName,
VersionID: object.VersionID,
}
continue
}
_, errs[idx] = fs.DeleteObject(ctx, bucket, object.ObjectName, opts)
if errs[idx] == nil || isErrObjectNotFound(errs[idx]) {
dobjects[idx] = DeletedObject{
ObjectName: object.ObjectName,
}
errs[idx] = nil
}
}
return dobjects, errs
}
// 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, opts ObjectOptions) (objInfo ObjectInfo, err error) {
if opts.VersionID != "" && opts.VersionID != nullVersionID {
return objInfo, VersionNotFound{
Bucket: bucket,
Object: object,
VersionID: opts.VersionID,
}
}
defer NSUpdated(bucket, object)
// Acquire a write lock before deleting the object.
lk := fs.NewNSLock(bucket, object)
lkctx, err := lk.GetLock(ctx, globalOperationTimeout)
if err != nil {
return objInfo, err
}
ctx = lkctx.Context()
defer lk.Unlock(lkctx.Cancel)
if err = checkDelObjArgs(ctx, bucket, object); err != nil {
return objInfo, err
}
atomic.AddInt64(&fs.activeIOCount, 1)
defer func() {
atomic.AddInt64(&fs.activeIOCount, -1)
}()
if _, err = fs.statBucketDir(ctx, bucket); err != nil {
return objInfo, toObjectErr(err, bucket)
}
var rwlk *lock.LockedFile
minioMetaBucketDir := pathJoin(fs.fsPath, minioMetaBucket)
fsMetaPath := pathJoin(minioMetaBucketDir, bucketMetaPrefix, bucket, object, fs.metaJSONFile)
if bucket != minioMetaBucket {
rwlk, err = fs.rwPool.Write(fsMetaPath)
if err != nil && err != errFileNotFound {
logger.LogIf(ctx, err)
return objInfo, toObjectErr(err, bucket, object)
}
}
// Delete the object.
if err = fsDeleteFile(ctx, pathJoin(fs.fsPath, bucket), pathJoin(fs.fsPath, bucket, object)); err != nil {
if rwlk != nil {
rwlk.Close()
}
return objInfo, toObjectErr(err, bucket, object)
}
// Close fsMetaPath before deletion
if rwlk != nil {
rwlk.Close()
}
if bucket != minioMetaBucket {
// Delete the metadata object.
err = fsDeleteFile(ctx, minioMetaBucketDir, fsMetaPath)
if err != nil && err != errFileNotFound {
return objInfo, toObjectErr(err, bucket, object)
}
}
return ObjectInfo{Bucket: bucket, Name: object}, nil
}
func (fs *FSObjects) isLeafDir(bucket string, leafPath string) bool {
return fs.isObjectDir(bucket, leafPath)
}
func (fs *FSObjects) isLeaf(bucket string, leafPath string) bool {
return !strings.HasSuffix(leafPath, slashSeparator)
}
// 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, delayIsLeaf bool) {
var err error
entries, err = readDir(pathJoin(fs.fsPath, bucket, prefixDir))
if err != nil && err != errFileNotFound {
logger.LogIf(GlobalContext, err)
return false, nil, false
}
if len(entries) == 0 {
return true, nil, false
}
entries, delayIsLeaf = filterListEntries(bucket, prefixDir, entries, prefixEntry, fs.isLeaf)
return false, entries, delayIsLeaf
}
// 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
}
// ListObjectVersions not implemented for FS mode.
func (fs *FSObjects) ListObjectVersions(ctx context.Context, bucket, prefix, marker, versionMarker, delimiter string, maxKeys int) (loi ListObjectVersionsInfo, e error) {
return loi, NotImplemented{}
}
// 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.isLeaf, fs.isLeafDir, fs.getObjectInfoNoFSLock, fs.getObjectInfoNoFSLock)
}
// GetObjectTags - get object tags from an existing object
func (fs *FSObjects) GetObjectTags(ctx context.Context, bucket, object string, opts ObjectOptions) (*tags.Tags, error) {
if opts.VersionID != "" && opts.VersionID != nullVersionID {
return nil, VersionNotFound{
Bucket: bucket,
Object: object,
VersionID: opts.VersionID,
}
}
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, opts ObjectOptions) (ObjectInfo, error) {
if opts.VersionID != "" && opts.VersionID != nullVersionID {
return ObjectInfo{}, VersionNotFound{
Bucket: bucket,
Object: object,
VersionID: opts.VersionID,
}
}
fsMetaPath := pathJoin(fs.fsPath, minioMetaBucket, bucketMetaPrefix, bucket, object, fs.metaJSONFile)
fsMeta := fsMetaV1{}
wlk, err := fs.rwPool.Write(fsMetaPath)
if err != nil {
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()
// 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 ObjectInfo{}, toObjectErr(err, bucket, object)
}
// Stat the file to get file size.
fi, err := fsStatFile(ctx, pathJoin(fs.fsPath, bucket, object))
if err != nil {
return ObjectInfo{}, err
}
return fsMeta.ToObjectInfo(bucket, object, fi), nil
}
// DeleteObjectTags - delete object tags from an existing object
func (fs *FSObjects) DeleteObjectTags(ctx context.Context, bucket, object string, opts ObjectOptions) (ObjectInfo, error) {
return fs.PutObjectTags(ctx, bucket, object, "", opts)
}
// HealFormat - no-op for fs, Valid only for Erasure.
func (fs *FSObjects) HealFormat(ctx context.Context, dryRun bool) (madmin.HealResultItem, error) {
return madmin.HealResultItem{}, NotImplemented{}
}
// HealObject - no-op for fs. Valid only for Erasure.
func (fs *FSObjects) HealObject(ctx context.Context, bucket, object, versionID string, opts madmin.HealOpts) (
res madmin.HealResultItem, err error) {
return res, NotImplemented{}
}
// HealBucket - no-op for fs, Valid only for Erasure.
func (fs *FSObjects) HealBucket(ctx context.Context, bucket string, opts madmin.HealOpts) (madmin.HealResultItem,
error) {
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, opts ObjectOptions) error {
return fsWalk(ctx, fs, bucket, prefix, fs.listDirFactory(), fs.isLeaf, fs.isLeafDir, results, fs.getObjectInfoNoFSLock, fs.getObjectInfoNoFSLock)
}
// HealObjects - no-op for fs. Valid only for Erasure.
func (fs *FSObjects) HealObjects(ctx context.Context, bucket, prefix string, opts madmin.HealOpts, fn HealObjectFn) (e error) {
logger.LogIf(ctx, NotImplemented{})
return NotImplemented{}
}
// GetMetrics - no op
func (fs *FSObjects) GetMetrics(ctx context.Context) (*BackendMetrics, error) {
logger.LogIf(ctx, NotImplemented{})
return &BackendMetrics{}, 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
}
// IsListenSupported returns whether listen bucket notification is applicable for this layer.
func (fs *FSObjects) IsListenSupported() 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
}
// Health returns health of the object layer
func (fs *FSObjects) Health(ctx context.Context, opts HealthOptions) HealthResult {
if _, err := os.Stat(fs.fsPath); err != nil {
return HealthResult{}
}
return HealthResult{
Healthy: newObjectLayerFn() != nil,
}
}
// ReadHealth returns "read" health of the object layer
func (fs *FSObjects) ReadHealth(ctx context.Context) bool {
_, err := os.Stat(fs.fsPath)
return err == nil
}
// TransitionObject - transition object content to target tier.
func (fs *FSObjects) TransitionObject(ctx context.Context, bucket, object string, opts ObjectOptions) error {
return NotImplemented{}
}
// RestoreTransitionedObject - restore transitioned object content locally on this cluster.
func (fs *FSObjects) RestoreTransitionedObject(ctx context.Context, bucket, object string, opts ObjectOptions) error {
return NotImplemented{}
}
// GetRawData returns raw file data to the callback.
// Errors are ignored, only errors from the callback are returned.
// For now only direct file paths are supported.
func (fs *FSObjects) GetRawData(ctx context.Context, volume, file string, fn func(r io.Reader, host string, disk string, filename string, size int64, modtime time.Time) error) error {
f, err := os.Open(filepath.Join(fs.fsPath, volume, file))
if err != nil {
return nil
}
defer f.Close()
st, err := f.Stat()
if err != nil || st.IsDir() {
return nil
}
return fn(f, "fs", fs.fsUUID, file, st.Size(), st.ModTime())
}