xl/fs: Object layer - keep common functions into single place. (#1423)
Harshavardhana
9 years ago
committed by
Anand Babu (AB) Periasamy
parent
a9935f886c
commit
10a010c1ad
@ -0,0 +1,126 @@ |
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/* |
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* Minio Cloud Storage, (C) 2016 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 main |
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import ( |
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"path" |
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"sort" |
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) |
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/// Common object layer functions.
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// makeBucket - create a bucket, is a common function for both object layers.
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func makeBucket(storage StorageAPI, bucket string) error { |
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// Verify if bucket is valid.
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if !IsValidBucketName(bucket) { |
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return BucketNameInvalid{Bucket: bucket} |
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} |
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if err := storage.MakeVol(bucket); err != nil { |
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return toObjectErr(err, bucket) |
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} |
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// This happens for the first time, but keep this here since this
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// is the only place where it can be made expensive optimizing all
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// other calls.
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// Create minio meta volume, if it doesn't exist yet.
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if err := storage.MakeVol(minioMetaVolume); err != nil { |
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if err != errVolumeExists { |
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return toObjectErr(err, minioMetaVolume) |
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} |
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} |
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return nil |
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} |
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// getBucketInfo - fetch bucket info, is a common function for both object layers.
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func getBucketInfo(storage StorageAPI, bucket string) (BucketInfo, error) { |
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// Verify if bucket is valid.
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if !IsValidBucketName(bucket) { |
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return BucketInfo{}, BucketNameInvalid{Bucket: bucket} |
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} |
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vi, err := storage.StatVol(bucket) |
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if err != nil { |
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return BucketInfo{}, toObjectErr(err, bucket) |
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} |
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return BucketInfo{ |
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Name: bucket, |
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Created: vi.Created, |
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Total: vi.Total, |
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Free: vi.Free, |
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}, nil |
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} |
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// listBuckets - list all buckets, is a common function for both object layers.
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func listBuckets(storage StorageAPI) ([]BucketInfo, error) { |
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var bucketInfos []BucketInfo |
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vols, err := storage.ListVols() |
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if err != nil { |
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return nil, toObjectErr(err) |
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} |
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for _, vol := range vols { |
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// StorageAPI can send volume names which are incompatible
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// with buckets, handle it and skip them.
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if !IsValidBucketName(vol.Name) { |
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continue |
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} |
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bucketInfos = append(bucketInfos, BucketInfo{ |
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Name: vol.Name, |
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Created: vol.Created, |
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Total: vol.Total, |
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Free: vol.Free, |
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}) |
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} |
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sort.Sort(byBucketName(bucketInfos)) |
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return bucketInfos, nil |
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} |
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// deleteBucket - deletes a bucket, is a common function for both the layers.
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func deleteBucket(storage StorageAPI, bucket string) error { |
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// Verify if bucket is valid.
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if !IsValidBucketName(bucket) { |
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return BucketNameInvalid{Bucket: bucket} |
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} |
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if err := storage.DeleteVol(bucket); err != nil { |
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return toObjectErr(err) |
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} |
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return nil |
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} |
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// isUploadIDExists - verify if a given uploadID exists and is valid.
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func isUploadIDExists(storage StorageAPI, bucket, object, uploadID string) (bool, error) { |
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uploadIDPath := path.Join(bucket, object, uploadID) |
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st, err := storage.StatFile(minioMetaVolume, uploadIDPath) |
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if err != nil { |
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// Upload id does not exist.
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if err == errFileNotFound { |
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return false, nil |
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} |
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return false, err |
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} |
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// Upload id exists and is a regular file.
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return st.Mode.IsRegular(), nil |
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} |
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// checks whether bucket exists.
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func isBucketExist(storage StorageAPI, bucketName string) (bool, error) { |
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// Check whether bucket exists.
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if _, e := storage.StatVol(bucketName); e != nil { |
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if e == errVolumeNotFound { |
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return false, nil |
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} |
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return false, e |
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} |
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return true, nil |
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} |
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