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erasure-bucket.go
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/
erasure-bucket.go
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// Copyright (c) 2015-2021 MinIO, Inc.
//
// This file is part of MinIO Object Storage stack
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package cmd
import (
"context"
"errors"
"github.com/minio/minio-go/v7/pkg/s3utils"
"github.com/nitrictech/minio/internal/logger"
"github.com/nitrictech/minio/internal/sync/errgroup"
)
// list all errors that can be ignore in a bucket operation.
var bucketOpIgnoredErrs = append(baseIgnoredErrs, errDiskAccessDenied, errUnformattedDisk)
// list all errors that can be ignored in a bucket metadata operation.
var bucketMetadataOpIgnoredErrs = append(bucketOpIgnoredErrs, errVolumeNotFound)
// Bucket operations
// MakeBucket - make a bucket.
func (er erasureObjects) MakeBucketWithLocation(ctx context.Context, bucket string, opts MakeBucketOptions) error {
defer NSUpdated(bucket, slashSeparator)
// Verify if bucket is valid.
if !isMinioMetaBucketName(bucket) {
if err := s3utils.CheckValidBucketNameStrict(bucket); err != nil {
return BucketNameInvalid{Bucket: bucket}
}
}
storageDisks := er.getDisks()
g := errgroup.WithNErrs(len(storageDisks))
// Make a volume entry on all underlying storage disks.
for index := range storageDisks {
index := index
g.Go(func() error {
if storageDisks[index] != nil {
if err := storageDisks[index].MakeVol(ctx, bucket); err != nil {
if opts.ForceCreate && errors.Is(err, errVolumeExists) {
// No need to return error when force create was
// requested.
return nil
}
if !errors.Is(err, errVolumeExists) {
logger.LogIf(ctx, err)
}
return err
}
return nil
}
return errDiskNotFound
}, index)
}
err := reduceWriteQuorumErrs(ctx, g.Wait(), bucketOpIgnoredErrs, er.defaultWQuorum())
return toObjectErr(err, bucket)
}
func undoDeleteBucket(storageDisks []StorageAPI, bucket string) {
g := errgroup.WithNErrs(len(storageDisks))
// Undo previous make bucket entry on all underlying storage disks.
for index := range storageDisks {
if storageDisks[index] == nil {
continue
}
index := index
g.Go(func() error {
_ = storageDisks[index].MakeVol(context.Background(), bucket)
return nil
}, index)
}
// Wait for all make vol to finish.
g.Wait()
}
// getBucketInfo - returns the BucketInfo from one of the load balanced disks.
func (er erasureObjects) getBucketInfo(ctx context.Context, bucketName string, opts BucketOptions) (bucketInfo BucketInfo, err error) {
storageDisks := er.getDisks()
g := errgroup.WithNErrs(len(storageDisks))
bucketsInfo := make([]BucketInfo, len(storageDisks))
// Undo previous make bucket entry on all underlying storage disks.
for index := range storageDisks {
index := index
g.Go(func() error {
if storageDisks[index] == nil {
return errDiskNotFound
}
volInfo, err := storageDisks[index].StatVol(ctx, bucketName)
if err != nil {
if opts.Deleted {
dvi, derr := storageDisks[index].StatVol(ctx, pathJoin(minioMetaBucket, bucketMetaPrefix, deletedBucketsPrefix, bucketName))
if derr != nil {
return err
}
bucketsInfo[index] = BucketInfo{Name: bucketName, Deleted: dvi.Created}
return nil
}
return err
}
bucketsInfo[index] = BucketInfo{Name: volInfo.Name, Created: volInfo.Created}
return nil
}, index)
}
errs := g.Wait()
for i, err := range errs {
if err == nil {
return bucketsInfo[i], nil
}
}
// If all our errors were ignored, then we try to
// reduce to one error based on read quorum.
// `nil` is deliberately passed for ignoredErrs
// because these errors were already ignored.
return BucketInfo{}, reduceReadQuorumErrs(ctx, errs, nil, er.defaultRQuorum())
}
// GetBucketInfo - returns BucketInfo for a bucket.
func (er erasureObjects) GetBucketInfo(ctx context.Context, bucket string, opts BucketOptions) (bi BucketInfo, e error) {
bucketInfo, err := er.getBucketInfo(ctx, bucket, opts)
if err != nil {
return bi, toObjectErr(err, bucket)
}
return bucketInfo, nil
}
// DeleteBucket - deletes a bucket.
func (er erasureObjects) DeleteBucket(ctx context.Context, bucket string, opts DeleteBucketOptions) error {
// Collect if all disks report volume not found.
defer NSUpdated(bucket, slashSeparator)
storageDisks := er.getDisks()
g := errgroup.WithNErrs(len(storageDisks))
for index := range storageDisks {
index := index
g.Go(func() error {
if storageDisks[index] != nil {
return storageDisks[index].DeleteVol(ctx, bucket, opts.Force)
}
return errDiskNotFound
}, index)
}
// Wait for all the delete vols to finish.
dErrs := g.Wait()
if opts.Force {
for _, err := range dErrs {
if err != nil {
undoDeleteBucket(storageDisks, bucket)
return toObjectErr(err, bucket)
}
}
return nil
}
err := reduceWriteQuorumErrs(ctx, dErrs, bucketOpIgnoredErrs, er.defaultWQuorum())
if err == errErasureWriteQuorum && !opts.NoRecreate {
undoDeleteBucket(storageDisks, bucket)
}
if err == nil || errors.Is(err, errVolumeNotFound) {
var purgedDangling bool
// At this point we have `err == nil` but some errors might be `errVolumeNotEmpty`
// we should proceed to attempt a force delete of such buckets.
for index, err := range dErrs {
if err == errVolumeNotEmpty && storageDisks[index] != nil {
storageDisks[index].RenameFile(ctx, bucket, "", minioMetaTmpDeletedBucket, mustGetUUID())
purgedDangling = true
}
}
// if we purged dangling buckets, ignore errVolumeNotFound error.
if purgedDangling {
err = nil
}
if opts.SRDeleteOp == MarkDelete {
er.markDelete(ctx, minioMetaBucket, pathJoin(bucketMetaPrefix, deletedBucketsPrefix, bucket))
}
}
return toObjectErr(err, bucket)
}
// markDelete creates a vol entry in .minio.sys/buckets/.deleted until site replication
// syncs the delete to peers
func (er erasureObjects) markDelete(ctx context.Context, bucket, prefix string) error {
storageDisks := er.getDisks()
g := errgroup.WithNErrs(len(storageDisks))
// Make a volume entry on all underlying storage disks.
for index := range storageDisks {
index := index
if storageDisks[index] == nil {
continue
}
g.Go(func() error {
if err := storageDisks[index].MakeVol(ctx, pathJoin(bucket, prefix)); err != nil {
if errors.Is(err, errVolumeExists) {
return nil
}
return err
}
return nil
}, index)
}
err := reduceWriteQuorumErrs(ctx, g.Wait(), bucketOpIgnoredErrs, er.defaultWQuorum())
return toObjectErr(err, bucket)
}
// purgeDelete deletes vol entry in .minio.sys/buckets/.deleted after site replication
// syncs the delete to peers OR on a new MakeBucket call.
func (er erasureObjects) purgeDelete(ctx context.Context, bucket, prefix string) error {
storageDisks := er.getDisks()
g := errgroup.WithNErrs(len(storageDisks))
// Make a volume entry on all underlying storage disks.
for index := range storageDisks {
index := index
g.Go(func() error {
if storageDisks[index] != nil {
return storageDisks[index].DeleteVol(ctx, pathJoin(bucket, prefix), true)
}
return errDiskNotFound
}, index)
}
err := reduceWriteQuorumErrs(ctx, g.Wait(), bucketOpIgnoredErrs, er.defaultWQuorum())
return toObjectErr(err, bucket)
}
// IsNotificationSupported returns whether bucket notification is applicable for this layer.
func (er erasureObjects) IsNotificationSupported() bool {
return true
}
// IsListenSupported returns whether listen bucket notification is applicable for this layer.
func (er erasureObjects) IsListenSupported() bool {
return true
}
// IsEncryptionSupported returns whether server side encryption is implemented for this layer.
func (er erasureObjects) IsEncryptionSupported() bool {
return true
}
// IsCompressionSupported returns whether compression is applicable for this layer.
func (er erasureObjects) IsCompressionSupported() bool {
return true
}
// IsTaggingSupported indicates whether erasureObjects implements tagging support.
func (er erasureObjects) IsTaggingSupported() bool {
return true
}