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580 lines
18 KiB
580 lines
18 KiB
/*
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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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"encoding/base64"
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"encoding/hex"
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"io"
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"os"
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"path/filepath"
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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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"io/ioutil"
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"github.com/minio/minio/pkg/iodine"
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"github.com/minio/minio/pkg/storage/donut"
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"github.com/minio/minio/pkg/storage/drivers"
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"github.com/minio/minio/pkg/storage/trove"
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"github.com/minio/minio/pkg/utils/log"
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)
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type storedBucket struct {
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bucketMetadata drivers.BucketMetadata
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objectMetadata map[string]drivers.ObjectMetadata
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partMetadata map[string]drivers.PartMetadata
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multiPartSession map[string]multiPartSession
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}
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type multiPartSession struct {
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totalParts int
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uploadID string
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initiated time.Time
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}
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const (
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totalBuckets = 100
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)
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// donutDriver - creates a new single disk drivers driver using donut
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type donutDriver struct {
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donut donut.Donut
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paths []string
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lock *sync.RWMutex
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storedBuckets map[string]storedBucket
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objects *trove.Cache
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multiPartObjects *trove.Cache
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maxSize uint64
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expiration time.Duration
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}
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// This is a dummy nodeDiskMap which is going to be deprecated soon
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// once the Management API is standardized, this map is useful for now
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// to show multi disk API correctness and parity calculation
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//
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// Ideally this should be obtained from per node configuration file
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func createNodeDiskMap(p string) map[string][]string {
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nodes := make(map[string][]string)
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nodes["localhost"] = make([]string, 16)
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for i := 0; i < len(nodes["localhost"]); i++ {
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diskPath := filepath.Join(p, strconv.Itoa(i))
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if _, err := os.Stat(diskPath); err != nil {
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if os.IsNotExist(err) {
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os.MkdirAll(diskPath, 0700)
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}
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}
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nodes["localhost"][i] = diskPath
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}
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return nodes
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}
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// This is a dummy nodeDiskMap which is going to be deprecated soon
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// once the Management API is standardized, and we have way of adding
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// and removing disks. This is useful for now to take inputs from CLI
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func createNodeDiskMapFromSlice(paths []string) map[string][]string {
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diskPaths := make([]string, len(paths))
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nodes := make(map[string][]string)
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for i, p := range paths {
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diskPath := filepath.Join(p, strconv.Itoa(i))
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if _, err := os.Stat(diskPath); err != nil {
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if os.IsNotExist(err) {
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os.MkdirAll(diskPath, 0700)
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}
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}
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diskPaths[i] = diskPath
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}
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nodes["localhost"] = diskPaths
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return nodes
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}
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// Start a single disk subsystem
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func Start(paths []string, maxSize uint64, expiration time.Duration) (chan<- string, <-chan error, drivers.Driver) {
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ctrlChannel := make(chan string)
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errorChannel := make(chan error)
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driver := new(donutDriver)
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driver.storedBuckets = make(map[string]storedBucket)
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driver.objects = trove.NewCache(maxSize, expiration)
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driver.maxSize = maxSize
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driver.expiration = expiration
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driver.multiPartObjects = trove.NewCache(0, time.Duration(0))
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driver.lock = new(sync.RWMutex)
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driver.objects.OnExpired = driver.expiredObject
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driver.multiPartObjects.OnExpired = driver.expiredPart
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// set up memory expiration
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driver.objects.ExpireObjects(time.Second * 5)
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// Soon to be user configurable, when Management API is available
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// we should remove "default" to something which is passed down
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// from configuration paramters
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switch {
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case len(paths) == 1:
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d, err := donut.NewDonut("default", createNodeDiskMap(paths[0]))
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if err != nil {
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err = iodine.New(err, nil)
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log.Error.Println(err)
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}
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driver.donut = d
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default:
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d, err := donut.NewDonut("default", createNodeDiskMapFromSlice(paths))
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if err != nil {
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err = iodine.New(err, nil)
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log.Error.Println(err)
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}
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driver.donut = d
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}
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driver.paths = paths
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driver.lock = new(sync.RWMutex)
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go start(ctrlChannel, errorChannel, driver)
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return ctrlChannel, errorChannel, driver
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}
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func start(ctrlChannel <-chan string, errorChannel chan<- error, driver *donutDriver) {
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close(errorChannel)
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}
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func (d donutDriver) expiredObject(a ...interface{}) {
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cacheStats := d.objects.Stats()
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log.Printf("CurrentSize: %d, CurrentItems: %d, TotalExpirations: %d",
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cacheStats.Bytes, cacheStats.Items, cacheStats.Expired)
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key := a[0].(string)
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// loop through all buckets
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for bucket, storedBucket := range d.storedBuckets {
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delete(storedBucket.objectMetadata, key)
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// remove bucket if no objects found anymore
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if len(storedBucket.objectMetadata) == 0 {
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if time.Since(d.storedBuckets[bucket].bucketMetadata.Created) > d.expiration {
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delete(d.storedBuckets, bucket)
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}
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}
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}
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go debug.FreeOSMemory()
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}
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// byBucketName is a type for sorting bucket metadata by bucket name
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type byBucketName []drivers.BucketMetadata
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func (b byBucketName) Len() int { return len(b) }
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func (b byBucketName) Swap(i, j int) { b[i], b[j] = b[j], b[i] }
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func (b byBucketName) Less(i, j int) bool { return b[i].Name < b[j].Name }
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// ListBuckets returns a list of buckets
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func (d donutDriver) ListBuckets() (results []drivers.BucketMetadata, err error) {
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if d.donut == nil {
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return nil, iodine.New(drivers.InternalError{}, nil)
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}
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buckets, err := d.donut.ListBuckets()
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if err != nil {
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return nil, err
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}
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for bucketName, metadata := range buckets {
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result := drivers.BucketMetadata{
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Name: metadata.Name,
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Created: metadata.Created,
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ACL: drivers.BucketACL(metadata.ACL),
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}
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d.lock.Lock()
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storedBucket := d.storedBuckets[bucketName]
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storedBucket.bucketMetadata = result
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d.storedBuckets[bucketName] = storedBucket
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d.lock.Unlock()
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results = append(results, result)
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}
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sort.Sort(byBucketName(results))
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return results, nil
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}
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// CreateBucket creates a new bucket
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func (d donutDriver) CreateBucket(bucketName, acl string) error {
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d.lock.Lock()
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defer d.lock.Unlock()
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if len(d.storedBuckets) == totalBuckets {
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return iodine.New(drivers.TooManyBuckets{Bucket: bucketName}, nil)
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}
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if d.donut == nil {
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return iodine.New(drivers.InternalError{}, nil)
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}
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if !drivers.IsValidBucketACL(acl) {
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return iodine.New(drivers.InvalidACL{ACL: acl}, nil)
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}
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if drivers.IsValidBucket(bucketName) && !strings.Contains(bucketName, ".") {
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if strings.TrimSpace(acl) == "" {
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acl = "private"
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}
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if err := d.donut.MakeBucket(bucketName, acl); err != nil {
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switch iodine.ToError(err).(type) {
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case donut.BucketExists:
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return iodine.New(drivers.BucketExists{Bucket: bucketName}, nil)
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}
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return iodine.New(err, nil)
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}
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var newBucket = storedBucket{}
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newBucket.objectMetadata = make(map[string]drivers.ObjectMetadata)
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newBucket.multiPartSession = make(map[string]multiPartSession)
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newBucket.partMetadata = make(map[string]drivers.PartMetadata)
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d.storedBuckets[bucketName] = newBucket
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return nil
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}
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return iodine.New(drivers.BucketNameInvalid{Bucket: bucketName}, nil)
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}
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// GetBucketMetadata retrieves an bucket's metadata
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func (d donutDriver) GetBucketMetadata(bucketName string) (drivers.BucketMetadata, error) {
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d.lock.RLock()
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defer d.lock.RUnlock()
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if d.donut == nil {
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return drivers.BucketMetadata{}, iodine.New(drivers.InternalError{}, nil)
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}
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if !drivers.IsValidBucket(bucketName) {
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return drivers.BucketMetadata{}, drivers.BucketNameInvalid{Bucket: bucketName}
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}
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if d.storedBuckets[bucketName].bucketMetadata.Name != "" {
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return d.storedBuckets[bucketName].bucketMetadata, nil
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}
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metadata, err := d.donut.GetBucketMetadata(bucketName)
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if err != nil {
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return drivers.BucketMetadata{}, iodine.New(drivers.BucketNotFound{Bucket: bucketName}, nil)
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}
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bucketMetadata := drivers.BucketMetadata{
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Name: bucketName,
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Created: metadata.Created,
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ACL: drivers.BucketACL(metadata.ACL),
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}
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return bucketMetadata, nil
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}
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// SetBucketMetadata sets bucket's metadata
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func (d donutDriver) SetBucketMetadata(bucketName, acl string) error {
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d.lock.Lock()
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defer d.lock.Unlock()
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if d.donut == nil {
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return iodine.New(drivers.InternalError{}, nil)
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}
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if !drivers.IsValidBucket(bucketName) || strings.Contains(bucketName, ".") {
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return iodine.New(drivers.BucketNameInvalid{Bucket: bucketName}, nil)
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}
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if strings.TrimSpace(acl) == "" {
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acl = "private"
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}
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bucketMetadata := make(map[string]string)
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bucketMetadata["acl"] = acl
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err := d.donut.SetBucketMetadata(bucketName, bucketMetadata)
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if err != nil {
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return iodine.New(drivers.BucketNotFound{Bucket: bucketName}, nil)
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}
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storedBucket := d.storedBuckets[bucketName]
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storedBucket.bucketMetadata.ACL = drivers.BucketACL(acl)
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d.storedBuckets[bucketName] = storedBucket
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return nil
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}
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// GetObject retrieves an object and writes it to a writer
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func (d donutDriver) GetObject(w io.Writer, bucketName, objectName string) (int64, error) {
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d.lock.RLock()
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defer d.lock.RUnlock()
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if d.donut == nil {
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return 0, iodine.New(drivers.InternalError{}, nil)
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}
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if !drivers.IsValidBucket(bucketName) || strings.Contains(bucketName, ".") {
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return 0, iodine.New(drivers.BucketNameInvalid{Bucket: bucketName}, nil)
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}
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if !drivers.IsValidObjectName(objectName) || strings.TrimSpace(objectName) == "" {
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return 0, iodine.New(drivers.ObjectNameInvalid{Object: objectName}, nil)
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}
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if _, ok := d.storedBuckets[bucketName]; ok == false {
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return 0, iodine.New(drivers.BucketNotFound{Bucket: bucketName}, nil)
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}
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objectKey := bucketName + "/" + objectName
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data, ok := d.objects.Get(objectKey)
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if !ok {
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reader, size, err := d.donut.GetObject(bucketName, objectName)
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if err != nil {
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return 0, iodine.New(drivers.ObjectNotFound{
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Bucket: bucketName,
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Object: objectName,
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}, nil)
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}
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n, err := io.CopyN(w, 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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return n, nil
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}
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written, err := io.Copy(w, bytes.NewBuffer(data))
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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 retrieves an object range and writes it to a writer
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func (d donutDriver) GetPartialObject(w io.Writer, bucketName, objectName string, start, length int64) (int64, error) {
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d.lock.RLock()
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defer d.lock.RUnlock()
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if d.donut == nil {
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return 0, iodine.New(drivers.InternalError{}, nil)
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}
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errParams := map[string]string{
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"bucketName": bucketName,
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"objectName": objectName,
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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 !drivers.IsValidBucket(bucketName) || strings.Contains(bucketName, ".") {
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return 0, iodine.New(drivers.BucketNameInvalid{Bucket: bucketName}, errParams)
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}
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if !drivers.IsValidObjectName(objectName) || strings.TrimSpace(objectName) == "" {
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return 0, iodine.New(drivers.ObjectNameInvalid{Object: objectName}, errParams)
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}
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if start < 0 {
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return 0, iodine.New(drivers.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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if _, ok := d.storedBuckets[bucketName]; ok == false {
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return 0, iodine.New(drivers.BucketNotFound{Bucket: bucketName}, nil)
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}
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objectKey := bucketName + "/" + objectName
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data, ok := d.objects.Get(objectKey)
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if !ok {
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reader, size, err := d.donut.GetObject(bucketName, objectName)
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if err != nil {
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return 0, iodine.New(drivers.ObjectNotFound{
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Bucket: bucketName,
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Object: objectName,
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}, nil)
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}
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defer reader.Close()
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if start > size || (start+length-1) > size {
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return 0, iodine.New(drivers.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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_, err = io.CopyN(ioutil.Discard, reader, start)
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if err != nil {
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return 0, iodine.New(err, errParams)
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}
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n, err := io.CopyN(w, reader, length)
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if err != nil {
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return 0, iodine.New(err, errParams)
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}
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return n, nil
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}
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written, err := io.CopyN(w, bytes.NewBuffer(data[start:]), length)
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return written, iodine.New(err, nil)
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}
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// GetObjectMetadata retrieves an object's metadata
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func (d donutDriver) GetObjectMetadata(bucketName, objectName string) (drivers.ObjectMetadata, error) {
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d.lock.RLock()
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defer d.lock.RUnlock()
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errParams := map[string]string{
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"bucketName": bucketName,
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"objectName": objectName,
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}
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if d.donut == nil {
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return drivers.ObjectMetadata{}, iodine.New(drivers.InternalError{}, errParams)
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}
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if !drivers.IsValidBucket(bucketName) {
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return drivers.ObjectMetadata{}, iodine.New(drivers.BucketNameInvalid{Bucket: bucketName}, errParams)
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}
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if !drivers.IsValidObjectName(objectName) {
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return drivers.ObjectMetadata{}, iodine.New(drivers.ObjectNameInvalid{Object: objectName}, errParams)
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}
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if _, ok := d.storedBuckets[bucketName]; !ok {
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return drivers.ObjectMetadata{}, iodine.New(drivers.BucketNotFound{Bucket: bucketName}, nil)
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}
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storedBucket := d.storedBuckets[bucketName]
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objectKey := bucketName + "/" + objectName
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if object, ok := storedBucket.objectMetadata[objectKey]; ok {
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return object, nil
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}
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metadata, err := d.donut.GetObjectMetadata(bucketName, objectName)
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if err != nil {
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return drivers.ObjectMetadata{}, iodine.New(drivers.ObjectNotFound{
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Bucket: bucketName,
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Object: objectName,
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}, errParams)
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}
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objectMetadata := drivers.ObjectMetadata{
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Bucket: bucketName,
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Key: objectName,
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ContentType: metadata.Metadata["contentType"],
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Created: metadata.Created,
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Md5: metadata.MD5Sum,
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Size: metadata.Size,
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}
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return objectMetadata, nil
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}
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// ListObjects - returns list of objects
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func (d donutDriver) ListObjects(bucketName string, resources drivers.BucketResourcesMetadata) ([]drivers.ObjectMetadata, drivers.BucketResourcesMetadata, error) {
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d.lock.RLock()
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defer d.lock.RUnlock()
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errParams := map[string]string{
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"bucketName": bucketName,
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}
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if d.donut == nil {
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return nil, drivers.BucketResourcesMetadata{}, iodine.New(drivers.InternalError{}, errParams)
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}
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if !drivers.IsValidBucket(bucketName) || strings.Contains(bucketName, ".") {
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return nil, drivers.BucketResourcesMetadata{}, iodine.New(drivers.BucketNameInvalid{Bucket: bucketName}, nil)
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}
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if !drivers.IsValidObjectName(resources.Prefix) {
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return nil, drivers.BucketResourcesMetadata{}, iodine.New(drivers.ObjectNameInvalid{Object: resources.Prefix}, nil)
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}
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listObjects, err := d.donut.ListObjects(bucketName, resources.Prefix, resources.Marker, resources.Delimiter, resources.Maxkeys)
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if err != nil {
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return nil, drivers.BucketResourcesMetadata{}, iodine.New(err, errParams)
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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.IsDelimiterSet() {
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resources.NextMarker = listObjects.Objects[len(listObjects.Objects)-1]
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}
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// make sure to keep the lexical order same as returned by donut
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// we do not have to sort here again
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results := make([]drivers.ObjectMetadata, len(listObjects.Objects))
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for i, objectName := range listObjects.Objects {
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objectMetadata, err := d.donut.GetObjectMetadata(bucketName, objectName)
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if err != nil {
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return nil, drivers.BucketResourcesMetadata{}, iodine.New(err, errParams)
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}
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metadata := drivers.ObjectMetadata{
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Key: objectMetadata.Object,
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Created: objectMetadata.Created,
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Size: objectMetadata.Size,
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}
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results[i] = metadata
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}
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return results, resources, nil
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}
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type proxyReader struct {
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io.Reader
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readBytes []byte
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}
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|
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func (r *proxyReader) Read(p []byte) (n int, err error) {
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n, err = r.Reader.Read(p)
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if err == io.EOF || err == io.ErrUnexpectedEOF {
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r.readBytes = append(r.readBytes, p[0:n]...)
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return
|
|
}
|
|
if err != nil {
|
|
return
|
|
}
|
|
r.readBytes = append(r.readBytes, p[0:n]...)
|
|
return
|
|
}
|
|
|
|
func newProxyReader(r io.Reader) *proxyReader {
|
|
return &proxyReader{r, nil}
|
|
}
|
|
|
|
// CreateObject creates a new object
|
|
func (d donutDriver) CreateObject(bucketName, objectName, contentType, expectedMD5Sum string, size int64, reader io.Reader) (string, error) {
|
|
d.lock.Lock()
|
|
defer d.lock.Unlock()
|
|
errParams := map[string]string{
|
|
"bucketName": bucketName,
|
|
"objectName": objectName,
|
|
"contentType": contentType,
|
|
}
|
|
if size > int64(d.maxSize) {
|
|
generic := drivers.GenericObjectError{Bucket: bucketName, Object: objectName}
|
|
return "", iodine.New(drivers.EntityTooLarge{
|
|
GenericObjectError: generic,
|
|
Size: strconv.FormatInt(size, 10),
|
|
MaxSize: strconv.FormatUint(d.maxSize, 10),
|
|
}, nil)
|
|
}
|
|
if d.donut == nil {
|
|
return "", iodine.New(drivers.InternalError{}, errParams)
|
|
}
|
|
if !drivers.IsValidBucket(bucketName) {
|
|
return "", iodine.New(drivers.BucketNameInvalid{Bucket: bucketName}, nil)
|
|
}
|
|
if !drivers.IsValidObjectName(objectName) {
|
|
return "", iodine.New(drivers.ObjectNameInvalid{Object: objectName}, nil)
|
|
}
|
|
storedBucket := d.storedBuckets[bucketName]
|
|
// get object key
|
|
objectKey := bucketName + "/" + objectName
|
|
if _, ok := storedBucket.objectMetadata[objectKey]; ok == true {
|
|
return "", iodine.New(drivers.ObjectExists{Bucket: bucketName, Object: objectName}, nil)
|
|
}
|
|
if strings.TrimSpace(contentType) == "" {
|
|
contentType = "application/octet-stream"
|
|
}
|
|
metadata := make(map[string]string)
|
|
metadata["contentType"] = strings.TrimSpace(contentType)
|
|
metadata["contentLength"] = strconv.FormatInt(size, 10)
|
|
if strings.TrimSpace(expectedMD5Sum) != "" {
|
|
expectedMD5SumBytes, err := base64.StdEncoding.DecodeString(strings.TrimSpace(expectedMD5Sum))
|
|
if err != nil {
|
|
return "", iodine.New(drivers.InvalidDigest{Md5: expectedMD5Sum}, nil)
|
|
}
|
|
expectedMD5Sum = hex.EncodeToString(expectedMD5SumBytes)
|
|
}
|
|
newReader := newProxyReader(reader)
|
|
calculatedMD5Sum, err := d.donut.PutObject(bucketName, objectName, expectedMD5Sum, newReader, metadata)
|
|
if err != nil {
|
|
switch iodine.ToError(err).(type) {
|
|
case donut.BadDigest:
|
|
return "", iodine.New(drivers.BadDigest{Md5: expectedMD5Sum, Bucket: bucketName, Key: objectName}, nil)
|
|
}
|
|
return "", iodine.New(err, errParams)
|
|
}
|
|
// get object key
|
|
ok := d.objects.Set(objectKey, newReader.readBytes)
|
|
// setting up for de-allocation
|
|
newReader.readBytes = nil
|
|
go debug.FreeOSMemory()
|
|
if !ok {
|
|
return "", iodine.New(drivers.InternalError{}, nil)
|
|
}
|
|
objectMetadata, err := d.donut.GetObjectMetadata(bucketName, objectName)
|
|
if err != nil {
|
|
return "", iodine.New(err, nil)
|
|
}
|
|
newObject := drivers.ObjectMetadata{
|
|
Bucket: bucketName,
|
|
Key: objectName,
|
|
|
|
ContentType: objectMetadata.Metadata["contentType"],
|
|
Created: objectMetadata.Created,
|
|
Md5: calculatedMD5Sum,
|
|
Size: objectMetadata.Size,
|
|
}
|
|
storedBucket.objectMetadata[objectKey] = newObject
|
|
d.storedBuckets[bucketName] = storedBucket
|
|
return calculatedMD5Sum, nil
|
|
}
|
|
|