60 lines
2.1 KiB
Go
60 lines
2.1 KiB
Go
// Copyright (c) 2015-2021 MinIO, Inc.
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//
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// This file is part of MinIO Object Storage stack
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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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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"github.com/minio/minio/internal/bpool"
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xioutil "github.com/minio/minio/internal/ioutil"
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"github.com/minio/minio/internal/logger"
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)
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// Heal heals the shard files on non-nil writers. Note that the quorum passed is 1
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// as healing should continue even if it has been successful healing only one shard file.
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func (e Erasure) Heal(ctx context.Context, readers []io.ReaderAt, writers []io.Writer, size int64, bp *bpool.BytePoolCap) error {
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r, w := xioutil.WaitPipe()
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go func() {
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_, err := e.Decode(ctx, w, readers, 0, size, size, nil)
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w.CloseWithError(err)
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}()
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// Fetch buffer for I/O, returns from the pool if not allocates a new one and returns.
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var buffer []byte
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switch {
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case size == 0:
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buffer = make([]byte, 1) // Allocate atleast a byte to reach EOF
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case size >= e.blockSize:
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buffer = bp.Get()
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defer bp.Put(buffer)
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case size < e.blockSize:
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// No need to allocate fully blockSizeV1 buffer if the incoming data is smaller.
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buffer = make([]byte, size, 2*size+int64(e.parityBlocks+e.dataBlocks-1))
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}
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// quorum is 1 because CreateFile should continue writing as long as we are writing to even 1 disk.
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n, err := e.Encode(ctx, r, writers, buffer, 1)
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if err == nil && n != size {
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logger.LogIf(ctx, errLessData)
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err = errLessData
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}
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r.CloseWithError(err)
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return err
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}
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