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66174692a2
add a hint on the disk to allow for tracking fresh disk being healed, to allow for restartable heals, and also use this as a way to track and remove disks. There are more pending changes where we should move all the disk formatting logic to backend drives, this PR doesn't deal with this refactor instead makes it easier to track healing in the future.
127 lines
4.7 KiB
Go
127 lines
4.7 KiB
Go
/*
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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 cmd
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import (
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"context"
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"io"
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)
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// StorageAPI interface.
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type StorageAPI interface {
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// Stringified version of disk.
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String() string
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// Storage operations.
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IsOnline() bool // Returns true if disk is online.
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IsLocal() bool
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Hostname() string // Returns host name if remote host.
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Endpoint() Endpoint // Returns endpoint.
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Close() error
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GetDiskID() (string, error)
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SetDiskID(id string)
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Healing() bool // Returns if disk is healing.
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DiskInfo(ctx context.Context) (info DiskInfo, err error)
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CrawlAndGetDataUsage(ctx context.Context, cache dataUsageCache) (dataUsageCache, error)
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// Volume operations.
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MakeVol(ctx context.Context, volume string) (err error)
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MakeVolBulk(ctx context.Context, volumes ...string) (err error)
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ListVols(ctx context.Context) (vols []VolInfo, err error)
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StatVol(ctx context.Context, volume string) (vol VolInfo, err error)
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DeleteVol(ctx context.Context, volume string, forceDelete bool) (err error)
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// WalkVersions in sorted order directly on disk.
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WalkVersions(ctx context.Context, volume, dirPath, marker string, recursive bool, endWalkCh <-chan struct{}) (chan FileInfoVersions, error)
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// Walk in sorted order directly on disk.
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Walk(ctx context.Context, volume, dirPath, marker string, recursive bool, endWalkCh <-chan struct{}) (chan FileInfo, error)
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// Walk in sorted order directly on disk.
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WalkSplunk(ctx context.Context, volume, dirPath, marker string, endWalkCh <-chan struct{}) (chan FileInfo, error)
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// Metadata operations
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DeleteVersion(ctx context.Context, volume, path string, fi FileInfo) error
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DeleteVersions(ctx context.Context, volume string, versions []FileInfo) []error
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WriteMetadata(ctx context.Context, volume, path string, fi FileInfo) error
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ReadVersion(ctx context.Context, volume, path, versionID string) (FileInfo, error)
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RenameData(ctx context.Context, srcVolume, srcPath, dataDir, dstVolume, dstPath string) error
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// File operations.
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ListDir(ctx context.Context, volume, dirPath string, count int) ([]string, error)
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ReadFile(ctx context.Context, volume string, path string, offset int64, buf []byte, verifier *BitrotVerifier) (n int64, err error)
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AppendFile(ctx context.Context, volume string, path string, buf []byte) (err error)
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CreateFile(ctx context.Context, volume, path string, size int64, reader io.Reader) error
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ReadFileStream(ctx context.Context, volume, path string, offset, length int64) (io.ReadCloser, error)
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RenameFile(ctx context.Context, srcVolume, srcPath, dstVolume, dstPath string) error
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CheckParts(ctx context.Context, volume string, path string, fi FileInfo) error
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CheckFile(ctx context.Context, volume string, path string) (err error)
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DeleteFile(ctx context.Context, volume string, path string) (err error)
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VerifyFile(ctx context.Context, volume, path string, fi FileInfo) error
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// Write all data, syncs the data to disk.
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WriteAll(ctx context.Context, volume string, path string, reader io.Reader) (err error)
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// Read all.
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ReadAll(ctx context.Context, volume string, path string) (buf []byte, err error)
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}
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// storageReader is an io.Reader view of a disk
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type storageReader struct {
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storage StorageAPI
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volume, path string
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offset int64
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}
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func (r *storageReader) Read(p []byte) (n int, err error) {
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nn, err := r.storage.ReadFile(context.TODO(), r.volume, r.path, r.offset, p, nil)
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r.offset += nn
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n = int(nn)
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if err == io.ErrUnexpectedEOF && nn > 0 {
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err = io.EOF
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}
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return
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}
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// storageWriter is a io.Writer view of a disk.
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type storageWriter struct {
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storage StorageAPI
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volume, path string
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}
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func (w *storageWriter) Write(p []byte) (n int, err error) {
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err = w.storage.AppendFile(context.TODO(), w.volume, w.path, p)
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if err == nil {
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n = len(p)
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}
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return
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}
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// StorageWriter returns a new io.Writer which appends data to the file
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// at the given disk, volume and path.
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func StorageWriter(storage StorageAPI, volume, path string) io.Writer {
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return &storageWriter{storage, volume, path}
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}
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// StorageReader returns a new io.Reader which reads data to the file
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// at the given disk, volume, path and offset.
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func StorageReader(storage StorageAPI, volume, path string, offset int64) io.Reader {
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return &storageReader{storage, volume, path, offset}
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}
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