minio/pkg/fs/fs-bucket.go

255 lines
6.8 KiB
Go

/*
* 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 (
"fmt"
"io"
"os"
"path/filepath"
"strings"
"github.com/minio/minio-xl/pkg/probe"
"github.com/minio/minio/pkg/disk"
"github.com/minio/minio/pkg/ioutils"
)
/// Bucket Operations
// DeleteBucket - delete bucket
func (fs Filesystem) DeleteBucket(bucket string) *probe.Error {
fs.lock.Lock()
defer fs.lock.Unlock()
// verify bucket path legal
if !IsValidBucketName(bucket) {
return probe.NewError(BucketNameInvalid{Bucket: bucket})
}
bucket = fs.denormalizeBucket(bucket)
bucketDir := filepath.Join(fs.path, bucket)
// check bucket exists
if _, e := os.Stat(bucketDir); e != nil {
if os.IsNotExist(e) {
return probe.NewError(BucketNotFound{Bucket: bucket})
}
return probe.NewError(e)
}
if e := os.Remove(bucketDir); e != nil {
// On windows the string is slightly different, handle it here.
if strings.Contains(e.Error(), "directory is not empty") {
return probe.NewError(BucketNotEmpty{Bucket: bucket})
}
// Hopefully for all other operating systems, this is
// assumed to be consistent.
if strings.Contains(e.Error(), "directory not empty") {
return probe.NewError(BucketNotEmpty{Bucket: bucket})
}
return probe.NewError(e)
}
delete(fs.buckets.Metadata, bucket)
if err := saveBucketsMetadata(fs.buckets); err != nil {
return err.Trace(bucket)
}
return nil
}
func removeDuplicateBuckets(elements []BucketMetadata) (result []BucketMetadata) {
// Use map to record duplicates as we find them.
duplicates := make(map[string]struct{})
for _, element := range elements {
if _, ok := duplicates[element.Name]; !ok {
duplicates[element.Name] = struct{}{}
result = append(result, element)
}
}
return result
}
// ListBuckets - Get service
func (fs Filesystem) ListBuckets() ([]BucketMetadata, *probe.Error) {
fs.lock.Lock()
defer fs.lock.Unlock()
files, err := ioutils.ReadDirN(fs.path, fs.maxBuckets)
if err != nil && err != io.EOF {
return []BucketMetadata{}, probe.NewError(err)
}
if err == io.EOF {
fmt.Printf("Truncating the bucket list to %d entries only.", fs.maxBuckets)
}
var metadataList []BucketMetadata
for _, file := range files {
if !file.IsDir() {
// if files found ignore them
continue
}
dirName := strings.ToLower(file.Name())
if file.IsDir() {
// if directories found with odd names, skip them too
if !IsValidBucketName(dirName) {
continue
}
}
metadata := BucketMetadata{
Name: dirName,
Created: file.ModTime(),
}
metadataList = append(metadataList, metadata)
}
metadataList = removeDuplicateBuckets(metadataList)
return metadataList, nil
}
// MakeBucket - PUT Bucket
func (fs Filesystem) MakeBucket(bucket, acl string) *probe.Error {
fs.lock.Lock()
defer fs.lock.Unlock()
di, err := disk.GetInfo(fs.path)
if err != nil {
return probe.NewError(err)
}
// Remove 5% from total space for cumulative disk space used for journalling, inodes etc.
availableDiskSpace := (float64(di.Free) / (float64(di.Total) - (0.05 * float64(di.Total)))) * 100
if int64(availableDiskSpace) <= fs.minFreeDisk {
return probe.NewError(RootPathFull{Path: fs.path})
}
// verify bucket path legal
if !IsValidBucketName(bucket) {
return probe.NewError(BucketNameInvalid{Bucket: bucket})
}
if !IsValidBucketACL(acl) {
return probe.NewError(InvalidACL{ACL: acl})
}
bucket = fs.denormalizeBucket(bucket)
// get bucket path
bucketDir := filepath.Join(fs.path, bucket)
if _, e := os.Stat(bucketDir); e == nil {
return probe.NewError(BucketExists{Bucket: bucket})
}
// make bucket
if e := os.Mkdir(bucketDir, 0700); e != nil {
return probe.NewError(err)
}
bucketMetadata := &BucketMetadata{}
fi, e := os.Stat(bucketDir)
// check if bucket exists
if e != nil {
if os.IsNotExist(e) {
return probe.NewError(BucketNotFound{Bucket: bucket})
}
return probe.NewError(e)
}
if strings.TrimSpace(acl) == "" {
acl = "private"
}
bucketMetadata.Name = fi.Name()
bucketMetadata.Created = fi.ModTime()
bucketMetadata.ACL = BucketACL(acl)
fs.buckets.Metadata[bucket] = bucketMetadata
if err := saveBucketsMetadata(fs.buckets); err != nil {
return err.Trace(bucket)
}
return nil
}
func (fs Filesystem) denormalizeBucket(bucket string) string {
buckets, err := ioutils.ReadDirNamesN(fs.path, fs.maxBuckets)
if err != nil {
return bucket
}
for _, b := range buckets {
if strings.ToLower(b) == bucket {
return b
}
}
return bucket
}
// GetBucketMetadata - get bucket metadata
func (fs Filesystem) GetBucketMetadata(bucket string) (BucketMetadata, *probe.Error) {
fs.lock.Lock()
defer fs.lock.Unlock()
if !IsValidBucketName(bucket) {
return BucketMetadata{}, probe.NewError(BucketNameInvalid{Bucket: bucket})
}
bucket = fs.denormalizeBucket(bucket)
// get bucket path
bucketDir := filepath.Join(fs.path, bucket)
fi, e := os.Stat(bucketDir)
if e != nil {
// check if bucket exists
if os.IsNotExist(e) {
return BucketMetadata{}, probe.NewError(BucketNotFound{Bucket: bucket})
}
return BucketMetadata{}, probe.NewError(e)
}
bucketMetadata, ok := fs.buckets.Metadata[bucket]
if !ok {
bucketMetadata = &BucketMetadata{}
bucketMetadata.Name = fi.Name()
bucketMetadata.Created = fi.ModTime()
bucketMetadata.ACL = BucketACL("private")
}
return *bucketMetadata, nil
}
// SetBucketMetadata - set bucket metadata
func (fs Filesystem) SetBucketMetadata(bucket string, metadata map[string]string) *probe.Error {
fs.lock.Lock()
defer fs.lock.Unlock()
if !IsValidBucketName(bucket) {
return probe.NewError(BucketNameInvalid{Bucket: bucket})
}
acl := metadata["acl"]
if !IsValidBucketACL(acl) {
return probe.NewError(InvalidACL{ACL: acl})
}
if strings.TrimSpace(acl) == "" {
acl = "private"
}
bucket = fs.denormalizeBucket(bucket)
bucketDir := filepath.Join(fs.path, bucket)
fi, e := os.Stat(bucketDir)
if e != nil {
// check if bucket exists
if os.IsNotExist(e) {
return probe.NewError(BucketNotFound{Bucket: bucket})
}
return probe.NewError(e)
}
bucketMetadata, ok := fs.buckets.Metadata[bucket]
if !ok {
bucketMetadata = &BucketMetadata{}
bucketMetadata.Name = fi.Name()
bucketMetadata.Created = fi.ModTime()
}
bucketMetadata.ACL = BucketACL(acl)
fs.buckets.Metadata[bucket] = bucketMetadata
if err := saveBucketsMetadata(fs.buckets); err != nil {
return err.Trace(bucket)
}
return nil
}