You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
637 lines
19 KiB
637 lines
19 KiB
/*
|
|
* Minio Cloud Storage, (C) 2015 Minio, Inc.
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
package xl
|
|
|
|
import (
|
|
"bytes"
|
|
"crypto/md5"
|
|
"encoding/base64"
|
|
"encoding/hex"
|
|
"io"
|
|
"io/ioutil"
|
|
"log"
|
|
"runtime/debug"
|
|
"sort"
|
|
"strconv"
|
|
"strings"
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/minio/minio/pkg/crypto/sha256"
|
|
"github.com/minio/minio/pkg/probe"
|
|
"github.com/minio/minio/pkg/quick"
|
|
signV4 "github.com/minio/minio/pkg/signature"
|
|
"github.com/minio/minio/pkg/xl/cache/data"
|
|
"github.com/minio/minio/pkg/xl/cache/metadata"
|
|
)
|
|
|
|
// total Number of buckets allowed
|
|
const (
|
|
totalBuckets = 100
|
|
)
|
|
|
|
// Config xl config
|
|
type Config struct {
|
|
Version string `json:"version"`
|
|
MaxSize uint64 `json:"max-size"`
|
|
XLName string `json:"xl-name"`
|
|
NodeDiskMap map[string][]string `json:"node-disk-map"`
|
|
}
|
|
|
|
// API - local variables
|
|
type API struct {
|
|
config *Config
|
|
lock *sync.Mutex
|
|
objects *data.Cache
|
|
multiPartObjects map[string]*data.Cache
|
|
storedBuckets *metadata.Cache
|
|
nodes map[string]node
|
|
buckets map[string]bucket
|
|
}
|
|
|
|
// storedBucket saved bucket
|
|
type storedBucket struct {
|
|
bucketMetadata BucketMetadata
|
|
objectMetadata map[string]ObjectMetadata
|
|
partMetadata map[string]map[int]PartMetadata
|
|
multiPartSession map[string]MultiPartSession
|
|
}
|
|
|
|
// New instantiate a new xl
|
|
func New() (Interface, *probe.Error) {
|
|
var conf *Config
|
|
var err *probe.Error
|
|
conf, err = LoadConfig()
|
|
if err != nil {
|
|
conf = &Config{
|
|
Version: "0.0.1",
|
|
MaxSize: 512000000,
|
|
NodeDiskMap: nil,
|
|
XLName: "",
|
|
}
|
|
if err := quick.CheckData(conf); err != nil {
|
|
return nil, err.Trace()
|
|
}
|
|
}
|
|
a := API{config: conf}
|
|
a.storedBuckets = metadata.NewCache()
|
|
a.nodes = make(map[string]node)
|
|
a.buckets = make(map[string]bucket)
|
|
a.objects = data.NewCache(a.config.MaxSize)
|
|
a.multiPartObjects = make(map[string]*data.Cache)
|
|
a.objects.OnEvicted = a.evictedObject
|
|
a.lock = new(sync.Mutex)
|
|
|
|
if len(a.config.NodeDiskMap) > 0 {
|
|
for k, v := range a.config.NodeDiskMap {
|
|
if len(v) == 0 {
|
|
return nil, probe.NewError(InvalidDisksArgument{})
|
|
}
|
|
err := a.AttachNode(k, v)
|
|
if err != nil {
|
|
return nil, err.Trace()
|
|
}
|
|
}
|
|
/// Initialization, populate all buckets into memory
|
|
buckets, err := a.listBuckets()
|
|
if err != nil {
|
|
return nil, err.Trace()
|
|
}
|
|
for k, v := range buckets {
|
|
var newBucket = storedBucket{}
|
|
newBucket.bucketMetadata = v
|
|
newBucket.objectMetadata = make(map[string]ObjectMetadata)
|
|
newBucket.multiPartSession = make(map[string]MultiPartSession)
|
|
newBucket.partMetadata = make(map[string]map[int]PartMetadata)
|
|
a.storedBuckets.Set(k, newBucket)
|
|
}
|
|
a.Heal()
|
|
}
|
|
return a, nil
|
|
}
|
|
|
|
/// V2 API functions
|
|
|
|
// GetObject - GET object from cache buffer
|
|
func (xl API) GetObject(w io.Writer, bucket string, object string, start, length int64) (int64, *probe.Error) {
|
|
xl.lock.Lock()
|
|
defer xl.lock.Unlock()
|
|
|
|
if !IsValidBucket(bucket) {
|
|
return 0, probe.NewError(BucketNameInvalid{Bucket: bucket})
|
|
}
|
|
if !IsValidObjectName(object) {
|
|
return 0, probe.NewError(ObjectNameInvalid{Object: object})
|
|
}
|
|
if start < 0 {
|
|
return 0, probe.NewError(InvalidRange{
|
|
Start: start,
|
|
Length: length,
|
|
})
|
|
}
|
|
if !xl.storedBuckets.Exists(bucket) {
|
|
return 0, probe.NewError(BucketNotFound{Bucket: bucket})
|
|
}
|
|
objectKey := bucket + "/" + object
|
|
data, ok := xl.objects.Get(objectKey)
|
|
var written int64
|
|
if !ok {
|
|
if len(xl.config.NodeDiskMap) > 0 {
|
|
reader, size, err := xl.getObject(bucket, object)
|
|
if err != nil {
|
|
return 0, err.Trace()
|
|
}
|
|
if start > 0 {
|
|
if _, err := io.CopyN(ioutil.Discard, reader, start); err != nil {
|
|
return 0, probe.NewError(err)
|
|
}
|
|
}
|
|
// new proxy writer to capture data read from disk
|
|
pw := NewProxyWriter(w)
|
|
{
|
|
var err error
|
|
if length > 0 {
|
|
written, err = io.CopyN(pw, reader, length)
|
|
if err != nil {
|
|
return 0, probe.NewError(err)
|
|
}
|
|
} else {
|
|
written, err = io.CopyN(pw, reader, size)
|
|
if err != nil {
|
|
return 0, probe.NewError(err)
|
|
}
|
|
}
|
|
}
|
|
/// cache object read from disk
|
|
ok := xl.objects.Append(objectKey, pw.writtenBytes)
|
|
pw.writtenBytes = nil
|
|
go debug.FreeOSMemory()
|
|
if !ok {
|
|
return 0, probe.NewError(InternalError{})
|
|
}
|
|
return written, nil
|
|
}
|
|
return 0, probe.NewError(ObjectNotFound{Object: object})
|
|
}
|
|
var err error
|
|
if start == 0 && length == 0 {
|
|
written, err = io.CopyN(w, bytes.NewBuffer(data), int64(xl.objects.Len(objectKey)))
|
|
if err != nil {
|
|
return 0, probe.NewError(err)
|
|
}
|
|
return written, nil
|
|
}
|
|
written, err = io.CopyN(w, bytes.NewBuffer(data[start:]), length)
|
|
if err != nil {
|
|
return 0, probe.NewError(err)
|
|
}
|
|
return written, nil
|
|
}
|
|
|
|
// GetBucketMetadata -
|
|
func (xl API) GetBucketMetadata(bucket string) (BucketMetadata, *probe.Error) {
|
|
xl.lock.Lock()
|
|
defer xl.lock.Unlock()
|
|
|
|
if !IsValidBucket(bucket) {
|
|
return BucketMetadata{}, probe.NewError(BucketNameInvalid{Bucket: bucket})
|
|
}
|
|
if !xl.storedBuckets.Exists(bucket) {
|
|
if len(xl.config.NodeDiskMap) > 0 {
|
|
bucketMetadata, err := xl.getBucketMetadata(bucket)
|
|
if err != nil {
|
|
return BucketMetadata{}, err.Trace()
|
|
}
|
|
storedBucket := xl.storedBuckets.Get(bucket).(storedBucket)
|
|
storedBucket.bucketMetadata = bucketMetadata
|
|
xl.storedBuckets.Set(bucket, storedBucket)
|
|
}
|
|
return BucketMetadata{}, probe.NewError(BucketNotFound{Bucket: bucket})
|
|
}
|
|
return xl.storedBuckets.Get(bucket).(storedBucket).bucketMetadata, nil
|
|
}
|
|
|
|
// SetBucketMetadata -
|
|
func (xl API) SetBucketMetadata(bucket string, metadata map[string]string) *probe.Error {
|
|
xl.lock.Lock()
|
|
defer xl.lock.Unlock()
|
|
|
|
if !IsValidBucket(bucket) {
|
|
return probe.NewError(BucketNameInvalid{Bucket: bucket})
|
|
}
|
|
if !xl.storedBuckets.Exists(bucket) {
|
|
return probe.NewError(BucketNotFound{Bucket: bucket})
|
|
}
|
|
if len(xl.config.NodeDiskMap) > 0 {
|
|
if err := xl.setBucketMetadata(bucket, metadata); err != nil {
|
|
return err.Trace()
|
|
}
|
|
}
|
|
storedBucket := xl.storedBuckets.Get(bucket).(storedBucket)
|
|
storedBucket.bucketMetadata.ACL = BucketACL(metadata["acl"])
|
|
xl.storedBuckets.Set(bucket, storedBucket)
|
|
return nil
|
|
}
|
|
|
|
// isMD5SumEqual - returns error if md5sum mismatches, success its `nil`
|
|
func isMD5SumEqual(expectedMD5Sum, actualMD5Sum string) *probe.Error {
|
|
if strings.TrimSpace(expectedMD5Sum) != "" && strings.TrimSpace(actualMD5Sum) != "" {
|
|
expectedMD5SumBytes, err := hex.DecodeString(expectedMD5Sum)
|
|
if err != nil {
|
|
return probe.NewError(err)
|
|
}
|
|
actualMD5SumBytes, err := hex.DecodeString(actualMD5Sum)
|
|
if err != nil {
|
|
return probe.NewError(err)
|
|
}
|
|
if !bytes.Equal(expectedMD5SumBytes, actualMD5SumBytes) {
|
|
return probe.NewError(BadDigest{})
|
|
}
|
|
return nil
|
|
}
|
|
return probe.NewError(InvalidArgument{})
|
|
}
|
|
|
|
// CreateObject - create an object
|
|
func (xl API) CreateObject(bucket, key, expectedMD5Sum string, size int64, data io.Reader, metadata map[string]string, signature *signV4.Signature) (ObjectMetadata, *probe.Error) {
|
|
xl.lock.Lock()
|
|
defer xl.lock.Unlock()
|
|
|
|
contentType := metadata["contentType"]
|
|
objectMetadata, err := xl.createObject(bucket, key, contentType, expectedMD5Sum, size, data, signature)
|
|
// free
|
|
debug.FreeOSMemory()
|
|
|
|
return objectMetadata, err.Trace()
|
|
}
|
|
|
|
// createObject - PUT object to cache buffer
|
|
func (xl API) createObject(bucket, key, contentType, expectedMD5Sum string, size int64, data io.Reader, signature *signV4.Signature) (ObjectMetadata, *probe.Error) {
|
|
if len(xl.config.NodeDiskMap) == 0 {
|
|
if size > int64(xl.config.MaxSize) {
|
|
generic := GenericObjectError{Bucket: bucket, Object: key}
|
|
return ObjectMetadata{}, probe.NewError(EntityTooLarge{
|
|
GenericObjectError: generic,
|
|
Size: strconv.FormatInt(size, 10),
|
|
MaxSize: strconv.FormatUint(xl.config.MaxSize, 10),
|
|
})
|
|
}
|
|
}
|
|
if !IsValidBucket(bucket) {
|
|
return ObjectMetadata{}, probe.NewError(BucketNameInvalid{Bucket: bucket})
|
|
}
|
|
if !IsValidObjectName(key) {
|
|
return ObjectMetadata{}, probe.NewError(ObjectNameInvalid{Object: key})
|
|
}
|
|
if !xl.storedBuckets.Exists(bucket) {
|
|
return ObjectMetadata{}, probe.NewError(BucketNotFound{Bucket: bucket})
|
|
}
|
|
storedBucket := xl.storedBuckets.Get(bucket).(storedBucket)
|
|
// get object key
|
|
objectKey := bucket + "/" + key
|
|
if _, ok := storedBucket.objectMetadata[objectKey]; ok == true {
|
|
return ObjectMetadata{}, probe.NewError(ObjectExists{Object: key})
|
|
}
|
|
|
|
if contentType == "" {
|
|
contentType = "application/octet-stream"
|
|
}
|
|
contentType = strings.TrimSpace(contentType)
|
|
if strings.TrimSpace(expectedMD5Sum) != "" {
|
|
expectedMD5SumBytes, err := base64.StdEncoding.DecodeString(strings.TrimSpace(expectedMD5Sum))
|
|
if err != nil {
|
|
// pro-actively close the connection
|
|
return ObjectMetadata{}, probe.NewError(InvalidDigest{Md5: expectedMD5Sum})
|
|
}
|
|
expectedMD5Sum = hex.EncodeToString(expectedMD5SumBytes)
|
|
}
|
|
|
|
if len(xl.config.NodeDiskMap) > 0 {
|
|
objMetadata, err := xl.putObject(
|
|
bucket,
|
|
key,
|
|
expectedMD5Sum,
|
|
data,
|
|
size,
|
|
map[string]string{
|
|
"contentType": contentType,
|
|
"contentLength": strconv.FormatInt(size, 10),
|
|
},
|
|
signature,
|
|
)
|
|
if err != nil {
|
|
return ObjectMetadata{}, err.Trace()
|
|
}
|
|
storedBucket.objectMetadata[objectKey] = objMetadata
|
|
xl.storedBuckets.Set(bucket, storedBucket)
|
|
return objMetadata, nil
|
|
}
|
|
|
|
// calculate md5
|
|
hash := md5.New()
|
|
sha256hash := sha256.New()
|
|
|
|
var err error
|
|
var totalLength int64
|
|
for err == nil {
|
|
var length int
|
|
byteBuffer := make([]byte, 1024*1024)
|
|
length, err = data.Read(byteBuffer)
|
|
if length != 0 {
|
|
hash.Write(byteBuffer[0:length])
|
|
sha256hash.Write(byteBuffer[0:length])
|
|
ok := xl.objects.Append(objectKey, byteBuffer[0:length])
|
|
if !ok {
|
|
return ObjectMetadata{}, probe.NewError(InternalError{})
|
|
}
|
|
totalLength += int64(length)
|
|
go debug.FreeOSMemory()
|
|
}
|
|
}
|
|
if size != 0 {
|
|
if totalLength != size {
|
|
// Delete perhaps the object is already saved, due to the nature of append()
|
|
xl.objects.Delete(objectKey)
|
|
return ObjectMetadata{}, probe.NewError(IncompleteBody{Bucket: bucket, Object: key})
|
|
}
|
|
}
|
|
if err != io.EOF {
|
|
return ObjectMetadata{}, probe.NewError(err)
|
|
}
|
|
md5SumBytes := hash.Sum(nil)
|
|
md5Sum := hex.EncodeToString(md5SumBytes)
|
|
// Verify if the written object is equal to what is expected, only if it is requested as such
|
|
if strings.TrimSpace(expectedMD5Sum) != "" {
|
|
if err := isMD5SumEqual(strings.TrimSpace(expectedMD5Sum), md5Sum); err != nil {
|
|
// Delete perhaps the object is already saved, due to the nature of append()
|
|
xl.objects.Delete(objectKey)
|
|
return ObjectMetadata{}, probe.NewError(BadDigest{})
|
|
}
|
|
}
|
|
if signature != nil {
|
|
ok, err := signature.DoesSignatureMatch(hex.EncodeToString(sha256hash.Sum(nil)))
|
|
if err != nil {
|
|
// Delete perhaps the object is already saved, due to the nature of append()
|
|
xl.objects.Delete(objectKey)
|
|
return ObjectMetadata{}, err.Trace()
|
|
}
|
|
if !ok {
|
|
// Delete perhaps the object is already saved, due to the nature of append()
|
|
xl.objects.Delete(objectKey)
|
|
return ObjectMetadata{}, probe.NewError(SignDoesNotMatch{})
|
|
}
|
|
}
|
|
|
|
m := make(map[string]string)
|
|
m["contentType"] = contentType
|
|
newObject := ObjectMetadata{
|
|
Bucket: bucket,
|
|
Object: key,
|
|
|
|
Metadata: m,
|
|
Created: time.Now().UTC(),
|
|
MD5Sum: md5Sum,
|
|
Size: int64(totalLength),
|
|
}
|
|
|
|
storedBucket.objectMetadata[objectKey] = newObject
|
|
xl.storedBuckets.Set(bucket, storedBucket)
|
|
return newObject, nil
|
|
}
|
|
|
|
// MakeBucket - create bucket in cache
|
|
func (xl API) MakeBucket(bucketName, acl string, location io.Reader, signature *signV4.Signature) *probe.Error {
|
|
xl.lock.Lock()
|
|
defer xl.lock.Unlock()
|
|
|
|
// do not have to parse location constraint, using this just for signature verification
|
|
locationSum := "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
|
|
if location != nil {
|
|
locationConstraintBytes, err := ioutil.ReadAll(location)
|
|
if err != nil {
|
|
return probe.NewError(InternalError{})
|
|
}
|
|
locationConstraintHashBytes := sha256.Sum256(locationConstraintBytes)
|
|
locationSum = hex.EncodeToString(locationConstraintHashBytes[:])
|
|
}
|
|
|
|
if signature != nil {
|
|
ok, err := signature.DoesSignatureMatch(locationSum)
|
|
if err != nil {
|
|
return err.Trace()
|
|
}
|
|
if !ok {
|
|
return probe.NewError(SignDoesNotMatch{})
|
|
}
|
|
}
|
|
|
|
if xl.storedBuckets.Stats().Items == totalBuckets {
|
|
return probe.NewError(TooManyBuckets{Bucket: bucketName})
|
|
}
|
|
if !IsValidBucket(bucketName) {
|
|
return probe.NewError(BucketNameInvalid{Bucket: bucketName})
|
|
}
|
|
if !IsValidBucketACL(acl) {
|
|
return probe.NewError(InvalidACL{ACL: acl})
|
|
}
|
|
if xl.storedBuckets.Exists(bucketName) {
|
|
return probe.NewError(BucketExists{Bucket: bucketName})
|
|
}
|
|
|
|
if strings.TrimSpace(acl) == "" {
|
|
// default is private
|
|
acl = "private"
|
|
}
|
|
if len(xl.config.NodeDiskMap) > 0 {
|
|
if err := xl.makeBucket(bucketName, BucketACL(acl)); err != nil {
|
|
return err.Trace()
|
|
}
|
|
}
|
|
var newBucket = storedBucket{}
|
|
newBucket.objectMetadata = make(map[string]ObjectMetadata)
|
|
newBucket.multiPartSession = make(map[string]MultiPartSession)
|
|
newBucket.partMetadata = make(map[string]map[int]PartMetadata)
|
|
newBucket.bucketMetadata = BucketMetadata{}
|
|
newBucket.bucketMetadata.Name = bucketName
|
|
newBucket.bucketMetadata.Created = time.Now().UTC()
|
|
newBucket.bucketMetadata.ACL = BucketACL(acl)
|
|
xl.storedBuckets.Set(bucketName, newBucket)
|
|
return nil
|
|
}
|
|
|
|
// ListObjects - list objects from cache
|
|
func (xl API) ListObjects(bucket string, resources BucketResourcesMetadata) ([]ObjectMetadata, BucketResourcesMetadata, *probe.Error) {
|
|
xl.lock.Lock()
|
|
defer xl.lock.Unlock()
|
|
|
|
if !IsValidBucket(bucket) {
|
|
return nil, BucketResourcesMetadata{IsTruncated: false}, probe.NewError(BucketNameInvalid{Bucket: bucket})
|
|
}
|
|
if !IsValidPrefix(resources.Prefix) {
|
|
return nil, BucketResourcesMetadata{IsTruncated: false}, probe.NewError(ObjectNameInvalid{Object: resources.Prefix})
|
|
}
|
|
if !xl.storedBuckets.Exists(bucket) {
|
|
return nil, BucketResourcesMetadata{IsTruncated: false}, probe.NewError(BucketNotFound{Bucket: bucket})
|
|
}
|
|
var results []ObjectMetadata
|
|
var keys []string
|
|
if len(xl.config.NodeDiskMap) > 0 {
|
|
listObjects, err := xl.listObjects(
|
|
bucket,
|
|
resources.Prefix,
|
|
resources.Marker,
|
|
resources.Delimiter,
|
|
resources.Maxkeys,
|
|
)
|
|
if err != nil {
|
|
return nil, BucketResourcesMetadata{IsTruncated: false}, err.Trace()
|
|
}
|
|
resources.CommonPrefixes = listObjects.CommonPrefixes
|
|
resources.IsTruncated = listObjects.IsTruncated
|
|
for key := range listObjects.Objects {
|
|
keys = append(keys, key)
|
|
}
|
|
sort.Strings(keys)
|
|
for _, key := range keys {
|
|
results = append(results, listObjects.Objects[key])
|
|
}
|
|
if resources.IsTruncated && resources.Delimiter != "" {
|
|
resources.NextMarker = results[len(results)-1].Object
|
|
}
|
|
return results, resources, nil
|
|
}
|
|
storedBucket := xl.storedBuckets.Get(bucket).(storedBucket)
|
|
for key := range storedBucket.objectMetadata {
|
|
if strings.HasPrefix(key, bucket+"/") {
|
|
key = key[len(bucket)+1:]
|
|
if strings.HasPrefix(key, resources.Prefix) {
|
|
if key > resources.Marker {
|
|
keys = append(keys, key)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if strings.TrimSpace(resources.Prefix) != "" {
|
|
keys = TrimPrefix(keys, resources.Prefix)
|
|
}
|
|
var prefixes []string
|
|
var filteredKeys []string
|
|
filteredKeys = keys
|
|
if strings.TrimSpace(resources.Delimiter) != "" {
|
|
filteredKeys = HasNoDelimiter(keys, resources.Delimiter)
|
|
prefixes = HasDelimiter(keys, resources.Delimiter)
|
|
prefixes = SplitDelimiter(prefixes, resources.Delimiter)
|
|
prefixes = SortUnique(prefixes)
|
|
}
|
|
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 (xl API) ListBuckets() ([]BucketMetadata, *probe.Error) {
|
|
xl.lock.Lock()
|
|
defer xl.lock.Unlock()
|
|
|
|
var results []BucketMetadata
|
|
if len(xl.config.NodeDiskMap) > 0 {
|
|
buckets, err := xl.listBuckets()
|
|
if err != nil {
|
|
return nil, err.Trace()
|
|
}
|
|
for _, bucketMetadata := range buckets {
|
|
results = append(results, bucketMetadata)
|
|
}
|
|
sort.Sort(byBucketName(results))
|
|
return results, nil
|
|
}
|
|
for _, bucket := range xl.storedBuckets.GetAll() {
|
|
results = append(results, bucket.(storedBucket).bucketMetadata)
|
|
}
|
|
sort.Sort(byBucketName(results))
|
|
return results, nil
|
|
}
|
|
|
|
// GetObjectMetadata - get object metadata from cache
|
|
func (xl API) GetObjectMetadata(bucket, key string) (ObjectMetadata, *probe.Error) {
|
|
xl.lock.Lock()
|
|
defer xl.lock.Unlock()
|
|
|
|
// check if bucket exists
|
|
if !IsValidBucket(bucket) {
|
|
return ObjectMetadata{}, probe.NewError(BucketNameInvalid{Bucket: bucket})
|
|
}
|
|
if !IsValidObjectName(key) {
|
|
return ObjectMetadata{}, probe.NewError(ObjectNameInvalid{Object: key})
|
|
}
|
|
if !xl.storedBuckets.Exists(bucket) {
|
|
return ObjectMetadata{}, probe.NewError(BucketNotFound{Bucket: bucket})
|
|
}
|
|
storedBucket := xl.storedBuckets.Get(bucket).(storedBucket)
|
|
objectKey := bucket + "/" + key
|
|
if objMetadata, ok := storedBucket.objectMetadata[objectKey]; ok == true {
|
|
return objMetadata, nil
|
|
}
|
|
if len(xl.config.NodeDiskMap) > 0 {
|
|
objMetadata, err := xl.getObjectMetadata(bucket, key)
|
|
if err != nil {
|
|
return ObjectMetadata{}, err.Trace()
|
|
}
|
|
// update
|
|
storedBucket.objectMetadata[objectKey] = objMetadata
|
|
xl.storedBuckets.Set(bucket, storedBucket)
|
|
return objMetadata, nil
|
|
}
|
|
return ObjectMetadata{}, probe.NewError(ObjectNotFound{Object: key})
|
|
}
|
|
|
|
// evictedObject callback function called when an item is evicted from memory
|
|
func (xl API) evictedObject(a ...interface{}) {
|
|
cacheStats := xl.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 xl.storedBuckets.GetAll() {
|
|
delete(bucket.(storedBucket).objectMetadata, key)
|
|
}
|
|
debug.FreeOSMemory()
|
|
}
|
|
|