mirror of
https://github.com/minio/minio.git
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267 lines
7.4 KiB
Go
267 lines
7.4 KiB
Go
/*
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* Minio Cloud 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 fs
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import (
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"fmt"
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"io"
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"os"
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"path/filepath"
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"strings"
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"github.com/minio/minio-xl/pkg/probe"
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"github.com/minio/minio/pkg/disk"
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"github.com/minio/minio/pkg/ioutils"
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)
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/// Bucket Operations
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// DeleteBucket - delete bucket
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func (fs Filesystem) DeleteBucket(bucket string) *probe.Error {
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fs.rwLock.Lock()
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defer fs.rwLock.Unlock()
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// verify bucket path legal
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if !IsValidBucketName(bucket) {
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return probe.NewError(BucketNameInvalid{Bucket: bucket})
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}
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bucket = fs.denormalizeBucket(bucket)
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bucketDir := filepath.Join(fs.path, bucket)
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// check bucket exists
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if _, e := os.Stat(bucketDir); e != nil {
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if os.IsNotExist(e) {
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return probe.NewError(BucketNotFound{Bucket: bucket})
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}
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return probe.NewError(e)
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}
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if e := os.Remove(bucketDir); e != nil {
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// On windows the string is slightly different, handle it here.
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if strings.Contains(e.Error(), "directory is not empty") {
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return probe.NewError(BucketNotEmpty{Bucket: bucket})
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}
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// Hopefully for all other operating systems, this is
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// assumed to be consistent.
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if strings.Contains(e.Error(), "directory not empty") {
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return probe.NewError(BucketNotEmpty{Bucket: bucket})
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}
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return probe.NewError(e)
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}
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delete(fs.buckets.Metadata, bucket)
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if err := saveBucketsMetadata(fs.buckets); err != nil {
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return err.Trace(bucket)
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}
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return nil
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}
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// ListBuckets - Get service.
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func (fs Filesystem) ListBuckets() ([]BucketMetadata, *probe.Error) {
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fs.rwLock.RLock()
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defer fs.rwLock.RUnlock()
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files, err := ioutils.ReadDirN(fs.path, fs.maxBuckets)
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if err != nil && err != io.EOF {
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return []BucketMetadata{}, probe.NewError(err)
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}
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if err == io.EOF {
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// This message is printed if there are more than 1000 buckets.
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fmt.Printf("More buckets found, truncating the bucket list to %d entries only.", fs.maxBuckets)
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}
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var metadataList []BucketMetadata
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for _, file := range files {
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if !file.IsDir() {
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// if files found ignore them
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continue
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}
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dirName := strings.ToLower(file.Name())
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if file.IsDir() {
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// If directories found with odd names, skip them.
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if !IsValidBucketName(dirName) {
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continue
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}
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}
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metadata := BucketMetadata{
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Name: dirName,
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Created: file.ModTime(),
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}
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metadataList = append(metadataList, metadata)
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}
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// Remove duplicated entries.
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metadataList = removeDuplicateBuckets(metadataList)
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return metadataList, nil
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}
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// removeDuplicateBuckets - remove duplicate buckets.
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func removeDuplicateBuckets(elements []BucketMetadata) (result []BucketMetadata) {
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// Use map to record duplicates as we find them.
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duplicates := make(map[string]struct{})
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for _, element := range elements {
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if _, ok := duplicates[element.Name]; !ok {
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duplicates[element.Name] = struct{}{}
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result = append(result, element)
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}
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}
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return result
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}
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// MakeBucket - PUT Bucket.
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func (fs Filesystem) MakeBucket(bucket, acl string) *probe.Error {
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fs.rwLock.Lock()
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defer fs.rwLock.Unlock()
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di, err := disk.GetInfo(fs.path)
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if err != nil {
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return probe.NewError(err)
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}
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// Remove 5% from total space for cumulative disk space used for
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// journalling, inodes etc.
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availableDiskSpace := (float64(di.Free) / (float64(di.Total) - (0.05 * float64(di.Total)))) * 100
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if int64(availableDiskSpace) <= fs.minFreeDisk {
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return probe.NewError(RootPathFull{Path: fs.path})
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}
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// Verify if bucket path legal.
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if !IsValidBucketName(bucket) {
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return probe.NewError(BucketNameInvalid{Bucket: bucket})
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}
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// Verify if bucket acl is legal.
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if !IsValidBucketACL(acl) {
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return probe.NewError(InvalidACL{ACL: acl})
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}
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bucket = fs.denormalizeBucket(bucket)
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// Get bucket path.
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bucketDir := filepath.Join(fs.path, bucket)
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if _, e := os.Stat(bucketDir); e == nil {
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return probe.NewError(BucketExists{Bucket: bucket})
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}
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// Make bucket.
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if e := os.Mkdir(bucketDir, 0700); e != nil {
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return probe.NewError(err)
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}
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bucketMetadata := &BucketMetadata{}
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fi, e := os.Stat(bucketDir)
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// Check if bucket exists.
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if e != nil {
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if os.IsNotExist(e) {
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return probe.NewError(BucketNotFound{Bucket: bucket})
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}
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return probe.NewError(e)
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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.Name = fi.Name()
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bucketMetadata.Created = fi.ModTime()
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bucketMetadata.ACL = BucketACL(acl)
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fs.buckets.Metadata[bucket] = bucketMetadata
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if err := saveBucketsMetadata(fs.buckets); err != nil {
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return err.Trace(bucket)
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}
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return nil
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}
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// denormalizeBucket - will convert incoming bucket names to
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// corresponding valid bucketnames on the backend in a platform
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// compatible way for all operating systems.
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func (fs Filesystem) denormalizeBucket(bucket string) string {
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buckets, e := ioutils.ReadDirNamesN(fs.path, fs.maxBuckets)
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if e != nil {
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return bucket
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}
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for _, b := range buckets {
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// Verify if lowercase version of the bucket is equal to the
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// incoming bucket, then use the proper name.
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if strings.ToLower(b) == bucket {
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return b
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}
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}
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return bucket
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}
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// GetBucketMetadata - get bucket metadata.
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func (fs Filesystem) GetBucketMetadata(bucket string) (BucketMetadata, *probe.Error) {
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fs.rwLock.RLock()
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defer fs.rwLock.RUnlock()
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if !IsValidBucketName(bucket) {
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return BucketMetadata{}, probe.NewError(BucketNameInvalid{Bucket: bucket})
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}
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bucket = fs.denormalizeBucket(bucket)
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// Get bucket path.
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bucketDir := filepath.Join(fs.path, bucket)
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fi, e := os.Stat(bucketDir)
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if e != nil {
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// Check if bucket exists.
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if os.IsNotExist(e) {
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return BucketMetadata{}, probe.NewError(BucketNotFound{Bucket: bucket})
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}
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return BucketMetadata{}, probe.NewError(e)
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}
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bucketMetadata, ok := fs.buckets.Metadata[bucket]
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if !ok {
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bucketMetadata = &BucketMetadata{}
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bucketMetadata.Name = fi.Name()
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bucketMetadata.Created = fi.ModTime()
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bucketMetadata.ACL = BucketACL("private")
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}
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return *bucketMetadata, nil
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}
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// SetBucketMetadata - set bucket metadata.
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func (fs Filesystem) SetBucketMetadata(bucket string, metadata map[string]string) *probe.Error {
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fs.rwLock.Lock()
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defer fs.rwLock.Unlock()
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// Input validation.
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if !IsValidBucketName(bucket) {
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return probe.NewError(BucketNameInvalid{Bucket: bucket})
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}
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// Save the acl.
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acl := metadata["acl"]
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if !IsValidBucketACL(acl) {
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return probe.NewError(InvalidACL{ACL: acl})
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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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bucket = fs.denormalizeBucket(bucket)
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bucketDir := filepath.Join(fs.path, bucket)
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fi, e := os.Stat(bucketDir)
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if e != nil {
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// Check if bucket exists.
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if os.IsNotExist(e) {
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return probe.NewError(BucketNotFound{Bucket: bucket})
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}
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return probe.NewError(e)
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}
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bucketMetadata, ok := fs.buckets.Metadata[bucket]
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if !ok {
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bucketMetadata = &BucketMetadata{}
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bucketMetadata.Name = fi.Name()
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bucketMetadata.Created = fi.ModTime()
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}
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bucketMetadata.ACL = BucketACL(acl)
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fs.buckets.Metadata[bucket] = bucketMetadata
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if err := saveBucketsMetadata(fs.buckets); err != nil {
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return err.Trace(bucket)
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}
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return nil
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}
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