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minio/pkg/fs/fs.go

135 lines
3.4 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 fs
import (
"os"
"path/filepath"
"sync"
"time"
"github.com/minio/minio-xl/pkg/probe"
"github.com/minio/minio/pkg/contentdb"
)
// Filesystem - local variables
type Filesystem struct {
path string
minFreeDisk int64
maxBuckets int
lock *sync.Mutex
multiparts *Multiparts
buckets *Buckets
listServiceReqCh chan<- listServiceReq
timeoutReqCh chan<- uint32
}
// Buckets holds acl information
type Buckets struct {
Version string `json:"version"`
Metadata map[string]*BucketMetadata
}
// MultipartSession holds active session information
type MultipartSession struct {
TotalParts int
UploadID string
Initiated time.Time
Parts []*PartMetadata
}
// Multiparts collection of many parts
type Multiparts struct {
Version string `json:"version"`
ActiveSession map[string]*MultipartSession `json:"activeSessions"`
}
// New instantiate a new donut
func New(rootPath string) (Filesystem, *probe.Error) {
setFSBucketsConfigPath(filepath.Join(rootPath, "$buckets.json"))
setFSMultipartsConfigPath(filepath.Join(rootPath, "$multiparts-session.json"))
var err *probe.Error
// load multiparts session from disk
var multiparts *Multiparts
multiparts, err = loadMultipartsSession()
if err != nil {
if os.IsNotExist(err.ToGoError()) {
multiparts = &Multiparts{
Version: "1",
ActiveSession: make(map[string]*MultipartSession),
}
if err := saveMultipartsSession(multiparts); err != nil {
return Filesystem{}, err.Trace()
}
} else {
return Filesystem{}, err.Trace()
}
}
// Initialize content db.
contentdb.Init()
var buckets *Buckets
buckets, err = loadBucketsMetadata()
if err != nil {
if os.IsNotExist(err.ToGoError()) {
buckets = &Buckets{
Version: "1",
Metadata: make(map[string]*BucketMetadata),
}
if err := saveBucketsMetadata(buckets); err != nil {
return Filesystem{}, err.Trace()
}
} else {
return Filesystem{}, err.Trace()
}
}
fs := Filesystem{lock: new(sync.Mutex)}
fs.path = rootPath
fs.multiparts = multiparts
fs.buckets = buckets
/// Defaults
// maximum buckets to be listed from list buckets.
fs.maxBuckets = 1000
// minium free disk required for i/o operations to succeed.
fs.minFreeDisk = 10
// Start list goroutine.
if err = fs.listObjectsService(); err != nil {
return Filesystem{}, err.Trace(rootPath)
}
// Return here.
return fs, nil
}
// SetMinFreeDisk - set min free disk
func (fs *Filesystem) SetMinFreeDisk(minFreeDisk int64) {
fs.lock.Lock()
defer fs.lock.Unlock()
fs.minFreeDisk = minFreeDisk
}
// SetMaxBuckets - set total number of buckets supported, default is 100.
func (fs *Filesystem) SetMaxBuckets(maxBuckets int) {
fs.lock.Lock()
defer fs.lock.Unlock()
if maxBuckets == 0 {
maxBuckets = 100
}
fs.maxBuckets = maxBuckets
}