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minio/pkg/fs/fs.go

108 lines
2.6 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"
"sync"
"time"
"github.com/minio/minio-xl/pkg/probe"
)
// Filesystem - local variables
type Filesystem struct {
path string
minFreeDisk int64
lock *sync.Mutex
multiparts *Multiparts
buckets *Buckets
}
// 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() (Filesystem, *probe.Error) {
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()
}
}
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()
}
}
a := Filesystem{lock: new(sync.Mutex)}
a.multiparts = multiparts
a.buckets = buckets
return a, nil
}
// SetRootPath - set root path
func (fs *Filesystem) SetRootPath(path string) {
fs.lock.Lock()
defer fs.lock.Unlock()
fs.path = path
}
// SetMinFreeDisk - set min free disk
func (fs *Filesystem) SetMinFreeDisk(minFreeDisk int64) {
fs.lock.Lock()
defer fs.lock.Unlock()
fs.minFreeDisk = minFreeDisk
}