mirror of https://github.com/minio/minio.git
607 lines
18 KiB
Go
607 lines
18 KiB
Go
/*
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* Minimalist Object Storage, (C) 2015 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 donut
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import (
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"bytes"
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"crypto/md5"
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"encoding/base64"
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"encoding/hex"
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"errors"
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"io"
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"io/ioutil"
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"log"
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"runtime/debug"
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"sort"
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"strconv"
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"strings"
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"sync"
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"time"
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"github.com/minio/minio/pkg/donut/cache/data"
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"github.com/minio/minio/pkg/donut/cache/metadata"
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"github.com/minio/minio/pkg/iodine"
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"github.com/minio/minio/pkg/quick"
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)
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// total Number of buckets allowed
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const (
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totalBuckets = 100
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)
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// Config donut config
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type Config struct {
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Version string `json:"version"`
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MaxSize uint64 `json:"max-size"`
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DonutName string `json:"donut-name"`
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NodeDiskMap map[string][]string `json:"node-disk-map"`
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}
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// API - local variables
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type API struct {
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config *Config
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lock *sync.Mutex
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objects *data.Cache
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multiPartObjects *data.Cache
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storedBuckets *metadata.Cache
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nodes map[string]node
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buckets map[string]bucket
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}
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// storedBucket saved bucket
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type storedBucket struct {
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bucketMetadata BucketMetadata
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objectMetadata map[string]ObjectMetadata
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partMetadata map[int]PartMetadata
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multiPartSession map[string]MultiPartSession
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}
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// New instantiate a new donut
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func New() (Interface, error) {
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var conf *Config
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var err error
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conf, err = LoadConfig()
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if err != nil {
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conf = &Config{
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Version: "0.0.1",
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MaxSize: 512000000,
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NodeDiskMap: nil,
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DonutName: "",
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}
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if err := quick.CheckData(conf); err != nil {
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return nil, iodine.New(err, nil)
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}
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}
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a := API{config: conf}
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a.storedBuckets = metadata.NewCache()
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a.nodes = make(map[string]node)
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a.buckets = make(map[string]bucket)
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a.objects = data.NewCache(a.config.MaxSize)
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a.multiPartObjects = data.NewCache(0)
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a.objects.OnEvicted = a.evictedObject
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a.multiPartObjects.OnEvicted = a.evictedPart
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a.lock = new(sync.Mutex)
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if len(a.config.NodeDiskMap) > 0 {
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for k, v := range a.config.NodeDiskMap {
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if len(v) == 0 {
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return nil, iodine.New(InvalidDisksArgument{}, nil)
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}
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err := a.AttachNode(k, v)
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if err != nil {
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return nil, iodine.New(err, nil)
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}
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}
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/// Initialization, populate all buckets into memory
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buckets, err := a.listBuckets()
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if err != nil {
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return nil, iodine.New(err, nil)
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}
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for k, v := range buckets {
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var newBucket = storedBucket{}
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newBucket.objectMetadata = make(map[string]ObjectMetadata)
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newBucket.multiPartSession = make(map[string]MultiPartSession)
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newBucket.partMetadata = make(map[int]PartMetadata)
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newBucket.bucketMetadata = v
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a.storedBuckets.Set(k, newBucket)
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}
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}
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return a, nil
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}
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// GetObject - GET object from cache buffer
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func (donut API) GetObject(w io.Writer, bucket string, object string) (int64, error) {
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donut.lock.Lock()
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defer donut.lock.Unlock()
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if !IsValidBucket(bucket) {
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return 0, iodine.New(BucketNameInvalid{Bucket: bucket}, nil)
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}
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if !IsValidObjectName(object) {
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return 0, iodine.New(ObjectNameInvalid{Object: object}, nil)
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}
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if !donut.storedBuckets.Exists(bucket) {
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return 0, iodine.New(BucketNotFound{Bucket: bucket}, nil)
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}
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objectKey := bucket + "/" + object
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data, ok := donut.objects.Get(objectKey)
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if !ok {
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if len(donut.config.NodeDiskMap) > 0 {
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reader, size, err := donut.getObject(bucket, object)
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if err != nil {
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return 0, iodine.New(err, nil)
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}
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// new proxy writer to capture data read from disk
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pw := NewProxyWriter(w)
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written, err := io.CopyN(pw, reader, size)
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if err != nil {
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return 0, iodine.New(err, nil)
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}
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/// cache object read from disk
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ok := donut.objects.Set(objectKey, pw.writtenBytes)
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pw.writtenBytes = nil
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go debug.FreeOSMemory()
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if !ok {
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return 0, iodine.New(InternalError{}, nil)
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}
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return written, nil
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}
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return 0, iodine.New(ObjectNotFound{Object: object}, nil)
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}
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written, err := io.CopyN(w, bytes.NewBuffer(data), int64(donut.objects.Len(objectKey)))
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if err != nil {
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return 0, iodine.New(err, nil)
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}
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return written, nil
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}
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// GetPartialObject - GET object from cache buffer range
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func (donut API) GetPartialObject(w io.Writer, bucket, object string, start, length int64) (int64, error) {
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donut.lock.Lock()
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defer donut.lock.Unlock()
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errParams := map[string]string{
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"bucket": bucket,
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"object": object,
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"start": strconv.FormatInt(start, 10),
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"length": strconv.FormatInt(length, 10),
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}
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if !IsValidBucket(bucket) {
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return 0, iodine.New(BucketNameInvalid{Bucket: bucket}, errParams)
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}
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if !IsValidObjectName(object) {
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return 0, iodine.New(ObjectNameInvalid{Object: object}, errParams)
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}
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if start < 0 {
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return 0, iodine.New(InvalidRange{
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Start: start,
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Length: length,
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}, errParams)
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}
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objectKey := bucket + "/" + object
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data, ok := donut.objects.Get(objectKey)
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if !ok {
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if len(donut.config.NodeDiskMap) > 0 {
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reader, _, err := donut.getObject(bucket, object)
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if err != nil {
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return 0, iodine.New(err, nil)
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}
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if _, err := io.CopyN(ioutil.Discard, reader, start); err != nil {
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return 0, iodine.New(err, nil)
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}
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pw := NewProxyWriter(w)
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written, err := io.CopyN(w, reader, length)
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if err != nil {
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return 0, iodine.New(err, nil)
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}
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ok := donut.objects.Set(objectKey, pw.writtenBytes)
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pw.writtenBytes = nil
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go debug.FreeOSMemory()
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if !ok {
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return 0, iodine.New(InternalError{}, nil)
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}
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return written, nil
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}
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return 0, iodine.New(ObjectNotFound{Object: object}, nil)
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}
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written, err := io.CopyN(w, bytes.NewBuffer(data[start:]), length)
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if err != nil {
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return 0, iodine.New(err, nil)
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}
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return written, nil
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}
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// GetBucketMetadata -
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func (donut API) GetBucketMetadata(bucket string) (BucketMetadata, error) {
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donut.lock.Lock()
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defer donut.lock.Unlock()
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if !IsValidBucket(bucket) {
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return BucketMetadata{}, iodine.New(BucketNameInvalid{Bucket: bucket}, nil)
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}
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if !donut.storedBuckets.Exists(bucket) {
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if len(donut.config.NodeDiskMap) > 0 {
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bucketMetadata, err := donut.getBucketMetadata(bucket)
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if err != nil {
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return BucketMetadata{}, iodine.New(err, nil)
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}
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storedBucket := donut.storedBuckets.Get(bucket).(storedBucket)
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storedBucket.bucketMetadata = bucketMetadata
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donut.storedBuckets.Set(bucket, storedBucket)
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}
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return BucketMetadata{}, iodine.New(BucketNotFound{Bucket: bucket}, nil)
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}
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return donut.storedBuckets.Get(bucket).(storedBucket).bucketMetadata, nil
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}
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// SetBucketMetadata -
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func (donut API) SetBucketMetadata(bucket string, metadata map[string]string) error {
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donut.lock.Lock()
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defer donut.lock.Unlock()
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if !IsValidBucket(bucket) {
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return iodine.New(BucketNameInvalid{Bucket: bucket}, nil)
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}
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if !donut.storedBuckets.Exists(bucket) {
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return iodine.New(BucketNotFound{Bucket: bucket}, nil)
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}
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if len(donut.config.NodeDiskMap) > 0 {
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if err := donut.setBucketMetadata(bucket, metadata); err != nil {
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return iodine.New(err, nil)
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}
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}
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storedBucket := donut.storedBuckets.Get(bucket).(storedBucket)
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storedBucket.bucketMetadata.ACL = BucketACL(metadata["acl"])
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donut.storedBuckets.Set(bucket, storedBucket)
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return nil
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}
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// isMD5SumEqual - returns error if md5sum mismatches, success its `nil`
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func isMD5SumEqual(expectedMD5Sum, actualMD5Sum string) error {
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if strings.TrimSpace(expectedMD5Sum) != "" && strings.TrimSpace(actualMD5Sum) != "" {
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expectedMD5SumBytes, err := hex.DecodeString(expectedMD5Sum)
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if err != nil {
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return iodine.New(err, nil)
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}
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actualMD5SumBytes, err := hex.DecodeString(actualMD5Sum)
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if err != nil {
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return iodine.New(err, nil)
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}
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if !bytes.Equal(expectedMD5SumBytes, actualMD5SumBytes) {
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return iodine.New(errors.New("bad digest, md5sum mismatch"), nil)
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}
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return nil
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}
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return iodine.New(errors.New("invalid argument"), nil)
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}
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// CreateObject - create an object
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func (donut API) CreateObject(bucket, key, expectedMD5Sum string, size int64, data io.Reader, metadata map[string]string) (ObjectMetadata, error) {
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donut.lock.Lock()
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defer donut.lock.Unlock()
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contentType := metadata["contentType"]
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objectMetadata, err := donut.createObject(bucket, key, contentType, expectedMD5Sum, size, data)
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// free
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debug.FreeOSMemory()
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return objectMetadata, iodine.New(err, nil)
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}
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// createObject - PUT object to cache buffer
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func (donut API) createObject(bucket, key, contentType, expectedMD5Sum string, size int64, data io.Reader) (ObjectMetadata, error) {
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if size > int64(donut.config.MaxSize) {
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generic := GenericObjectError{Bucket: bucket, Object: key}
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return ObjectMetadata{}, iodine.New(EntityTooLarge{
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GenericObjectError: generic,
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Size: strconv.FormatInt(size, 10),
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MaxSize: strconv.FormatUint(donut.config.MaxSize, 10),
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}, nil)
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}
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if !IsValidBucket(bucket) {
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return ObjectMetadata{}, iodine.New(BucketNameInvalid{Bucket: bucket}, nil)
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}
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if !IsValidObjectName(key) {
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return ObjectMetadata{}, iodine.New(ObjectNameInvalid{Object: key}, nil)
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}
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if !donut.storedBuckets.Exists(bucket) {
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return ObjectMetadata{}, iodine.New(BucketNotFound{Bucket: bucket}, nil)
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}
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storedBucket := donut.storedBuckets.Get(bucket).(storedBucket)
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// get object key
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objectKey := bucket + "/" + key
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if _, ok := storedBucket.objectMetadata[objectKey]; ok == true {
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return ObjectMetadata{}, iodine.New(ObjectExists{Object: key}, nil)
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}
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if contentType == "" {
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contentType = "application/octet-stream"
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}
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contentType = strings.TrimSpace(contentType)
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if strings.TrimSpace(expectedMD5Sum) != "" {
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expectedMD5SumBytes, err := base64.StdEncoding.DecodeString(strings.TrimSpace(expectedMD5Sum))
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if err != nil {
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// pro-actively close the connection
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return ObjectMetadata{}, iodine.New(InvalidDigest{Md5: expectedMD5Sum}, nil)
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}
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expectedMD5Sum = hex.EncodeToString(expectedMD5SumBytes)
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}
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if len(donut.config.NodeDiskMap) > 0 {
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objMetadata, err := donut.putObject(bucket, key, expectedMD5Sum, data, map[string]string{"contentType": contentType})
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if err != nil {
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return ObjectMetadata{}, iodine.New(err, nil)
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}
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storedBucket.objectMetadata[objectKey] = objMetadata
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donut.storedBuckets.Set(bucket, storedBucket)
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return objMetadata, nil
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}
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// calculate md5
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hash := md5.New()
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var err error
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var totalLength int
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for err == nil {
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var length int
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byteBuffer := make([]byte, 1024*1024)
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length, err = data.Read(byteBuffer)
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// While hash.Write() wouldn't mind a Nil byteBuffer
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// It is necessary for us to verify this and break
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if length == 0 {
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break
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}
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hash.Write(byteBuffer[0:length])
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ok := donut.objects.Append(objectKey, byteBuffer[0:length])
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if !ok {
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return ObjectMetadata{}, iodine.New(InternalError{}, nil)
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}
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totalLength += length
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go debug.FreeOSMemory()
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}
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if err != io.EOF {
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return ObjectMetadata{}, iodine.New(err, nil)
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}
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md5SumBytes := hash.Sum(nil)
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md5Sum := hex.EncodeToString(md5SumBytes)
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// Verify if the written object is equal to what is expected, only if it is requested as such
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if strings.TrimSpace(expectedMD5Sum) != "" {
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if err := isMD5SumEqual(strings.TrimSpace(expectedMD5Sum), md5Sum); err != nil {
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return ObjectMetadata{}, iodine.New(BadDigest{}, nil)
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}
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}
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m := make(map[string]string)
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m["contentType"] = contentType
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newObject := ObjectMetadata{
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Bucket: bucket,
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Object: key,
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Metadata: m,
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Created: time.Now().UTC(),
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MD5Sum: md5Sum,
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Size: int64(totalLength),
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}
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storedBucket.objectMetadata[objectKey] = newObject
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donut.storedBuckets.Set(bucket, storedBucket)
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return newObject, nil
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}
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// MakeBucket - create bucket in cache
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func (donut API) MakeBucket(bucketName, acl string) error {
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donut.lock.Lock()
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defer donut.lock.Unlock()
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if donut.storedBuckets.Stats().Items == totalBuckets {
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return iodine.New(TooManyBuckets{Bucket: bucketName}, nil)
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}
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if !IsValidBucket(bucketName) {
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return iodine.New(BucketNameInvalid{Bucket: bucketName}, nil)
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}
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if !IsValidBucketACL(acl) {
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return iodine.New(InvalidACL{ACL: acl}, nil)
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}
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if donut.storedBuckets.Exists(bucketName) {
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return iodine.New(BucketExists{Bucket: bucketName}, nil)
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}
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if strings.TrimSpace(acl) == "" {
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// default is private
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acl = "private"
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}
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if len(donut.config.NodeDiskMap) > 0 {
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if err := donut.makeBucket(bucketName, BucketACL(acl)); err != nil {
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return iodine.New(err, nil)
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}
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}
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var newBucket = storedBucket{}
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newBucket.objectMetadata = make(map[string]ObjectMetadata)
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newBucket.multiPartSession = make(map[string]MultiPartSession)
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newBucket.partMetadata = make(map[int]PartMetadata)
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newBucket.bucketMetadata = BucketMetadata{}
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newBucket.bucketMetadata.Name = bucketName
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newBucket.bucketMetadata.Created = time.Now().UTC()
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newBucket.bucketMetadata.ACL = BucketACL(acl)
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donut.storedBuckets.Set(bucketName, newBucket)
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return nil
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}
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// ListObjects - list objects from cache
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func (donut API) ListObjects(bucket string, resources BucketResourcesMetadata) ([]ObjectMetadata, BucketResourcesMetadata, error) {
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donut.lock.Lock()
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defer donut.lock.Unlock()
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if !IsValidBucket(bucket) {
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return nil, BucketResourcesMetadata{IsTruncated: false}, iodine.New(BucketNameInvalid{Bucket: bucket}, nil)
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}
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if !IsValidPrefix(resources.Prefix) {
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return nil, BucketResourcesMetadata{IsTruncated: false}, iodine.New(ObjectNameInvalid{Object: resources.Prefix}, nil)
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}
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if !donut.storedBuckets.Exists(bucket) {
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return nil, BucketResourcesMetadata{IsTruncated: false}, iodine.New(BucketNotFound{Bucket: bucket}, nil)
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}
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var results []ObjectMetadata
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var keys []string
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if len(donut.config.NodeDiskMap) > 0 {
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listObjects, err := donut.listObjects(
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bucket,
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resources.Prefix,
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resources.Marker,
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resources.Delimiter,
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resources.Maxkeys,
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)
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if err != nil {
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return nil, BucketResourcesMetadata{IsTruncated: false}, iodine.New(err, nil)
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}
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resources.CommonPrefixes = listObjects.CommonPrefixes
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resources.IsTruncated = listObjects.IsTruncated
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if resources.IsTruncated && resources.Delimiter != "" {
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resources.NextMarker = results[len(results)-1].Object
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}
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for key := range listObjects.Objects {
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keys = append(keys, key)
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}
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sort.Strings(keys)
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for _, key := range keys {
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results = append(results, listObjects.Objects[key])
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}
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return results, resources, nil
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}
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storedBucket := donut.storedBuckets.Get(bucket).(storedBucket)
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for key := range storedBucket.objectMetadata {
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if strings.HasPrefix(key, bucket+"/") {
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key = key[len(bucket)+1:]
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if strings.HasPrefix(key, resources.Prefix) {
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if key > resources.Marker {
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keys = append(keys, key)
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}
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}
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}
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}
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if strings.TrimSpace(resources.Prefix) != "" {
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keys = TrimPrefix(keys, resources.Prefix)
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}
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var prefixes []string
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var filteredKeys []string
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if strings.TrimSpace(resources.Delimiter) != "" {
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filteredKeys = HasNoDelimiter(keys, resources.Delimiter)
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prefixes = HasDelimiter(keys, resources.Delimiter)
|
|
prefixes = SplitDelimiter(prefixes, resources.Delimiter)
|
|
prefixes = SortU(prefixes)
|
|
} else {
|
|
filteredKeys = keys
|
|
}
|
|
for _, commonPrefix := range prefixes {
|
|
resources.CommonPrefixes = append(resources.CommonPrefixes, resources.Prefix+commonPrefix)
|
|
}
|
|
filteredKeys = RemoveDuplicates(filteredKeys)
|
|
sort.Strings(filteredKeys)
|
|
|
|
for _, key := range filteredKeys {
|
|
if len(results) == resources.Maxkeys {
|
|
resources.IsTruncated = true
|
|
if resources.IsTruncated && resources.Delimiter != "" {
|
|
resources.NextMarker = results[len(results)-1].Object
|
|
}
|
|
return results, resources, nil
|
|
}
|
|
object := storedBucket.objectMetadata[bucket+"/"+resources.Prefix+key]
|
|
results = append(results, object)
|
|
}
|
|
resources.CommonPrefixes = RemoveDuplicates(resources.CommonPrefixes)
|
|
sort.Strings(resources.CommonPrefixes)
|
|
return results, resources, nil
|
|
}
|
|
|
|
// byBucketName is a type for sorting bucket metadata by bucket name
|
|
type byBucketName []BucketMetadata
|
|
|
|
func (b byBucketName) Len() int { return len(b) }
|
|
func (b byBucketName) Swap(i, j int) { b[i], b[j] = b[j], b[i] }
|
|
func (b byBucketName) Less(i, j int) bool { return b[i].Name < b[j].Name }
|
|
|
|
// ListBuckets - List buckets from cache
|
|
func (donut API) ListBuckets() ([]BucketMetadata, error) {
|
|
donut.lock.Lock()
|
|
defer donut.lock.Unlock()
|
|
|
|
var results []BucketMetadata
|
|
if len(donut.config.NodeDiskMap) > 0 {
|
|
buckets, err := donut.listBuckets()
|
|
if err != nil {
|
|
return nil, iodine.New(err, nil)
|
|
}
|
|
for _, bucketMetadata := range buckets {
|
|
results = append(results, bucketMetadata)
|
|
}
|
|
sort.Sort(byBucketName(results))
|
|
return results, nil
|
|
}
|
|
for _, bucket := range donut.storedBuckets.GetAll() {
|
|
results = append(results, bucket.(storedBucket).bucketMetadata)
|
|
}
|
|
sort.Sort(byBucketName(results))
|
|
return results, nil
|
|
}
|
|
|
|
// GetObjectMetadata - get object metadata from cache
|
|
func (donut API) GetObjectMetadata(bucket, key string) (ObjectMetadata, error) {
|
|
donut.lock.Lock()
|
|
defer donut.lock.Unlock()
|
|
|
|
// check if bucket exists
|
|
if !IsValidBucket(bucket) {
|
|
return ObjectMetadata{}, iodine.New(BucketNameInvalid{Bucket: bucket}, nil)
|
|
}
|
|
if !IsValidObjectName(key) {
|
|
return ObjectMetadata{}, iodine.New(ObjectNameInvalid{Object: key}, nil)
|
|
}
|
|
if !donut.storedBuckets.Exists(bucket) {
|
|
return ObjectMetadata{}, iodine.New(BucketNotFound{Bucket: bucket}, nil)
|
|
}
|
|
storedBucket := donut.storedBuckets.Get(bucket).(storedBucket)
|
|
objectKey := bucket + "/" + key
|
|
if objMetadata, ok := storedBucket.objectMetadata[objectKey]; ok == true {
|
|
return objMetadata, nil
|
|
}
|
|
if len(donut.config.NodeDiskMap) > 0 {
|
|
objMetadata, err := donut.getObjectMetadata(bucket, key)
|
|
if err != nil {
|
|
return ObjectMetadata{}, iodine.New(err, nil)
|
|
}
|
|
// update
|
|
storedBucket.objectMetadata[objectKey] = objMetadata
|
|
donut.storedBuckets.Set(bucket, storedBucket)
|
|
return objMetadata, nil
|
|
}
|
|
return ObjectMetadata{}, iodine.New(ObjectNotFound{Object: key}, nil)
|
|
}
|
|
|
|
// evictedObject callback function called when an item is evicted from memory
|
|
func (donut API) evictedObject(a ...interface{}) {
|
|
cacheStats := donut.objects.Stats()
|
|
log.Printf("CurrentSize: %d, CurrentItems: %d, TotalEvicted: %d",
|
|
cacheStats.Bytes, cacheStats.Items, cacheStats.Evicted)
|
|
key := a[0].(string)
|
|
// loop through all buckets
|
|
for _, bucket := range donut.storedBuckets.GetAll() {
|
|
delete(bucket.(storedBucket).objectMetadata, key)
|
|
}
|
|
debug.FreeOSMemory()
|
|
}
|