OP#792 initial commit after fork
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156
cmd/erasure-heal_test.go
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156
cmd/erasure-heal_test.go
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// 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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"bytes"
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"crypto/rand"
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"io"
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"os"
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"testing"
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)
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var erasureHealTests = []struct {
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dataBlocks, disks int
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// number of offline disks is also number of staleDisks for
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// erasure reconstruction in this test
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offDisks int
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// bad disks are online disks which return errors
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badDisks, badStaleDisks int
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blocksize, size int64
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algorithm BitrotAlgorithm
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shouldFail bool
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}{
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{dataBlocks: 2, disks: 4, offDisks: 1, badDisks: 0, badStaleDisks: 0, blocksize: int64(blockSizeV2), size: oneMiByte, algorithm: SHA256, shouldFail: false}, // 0
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{dataBlocks: 3, disks: 6, offDisks: 2, badDisks: 0, badStaleDisks: 0, blocksize: int64(blockSizeV2), size: oneMiByte, algorithm: BLAKE2b512, shouldFail: false}, // 1
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{dataBlocks: 4, disks: 8, offDisks: 2, badDisks: 1, badStaleDisks: 0, blocksize: int64(blockSizeV2), size: oneMiByte, algorithm: BLAKE2b512, shouldFail: false}, // 2
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{dataBlocks: 5, disks: 10, offDisks: 3, badDisks: 1, badStaleDisks: 0, blocksize: int64(blockSizeV2), size: oneMiByte, algorithm: DefaultBitrotAlgorithm, shouldFail: false}, // 3
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{dataBlocks: 6, disks: 12, offDisks: 2, badDisks: 3, badStaleDisks: 0, blocksize: int64(blockSizeV2), size: oneMiByte, algorithm: SHA256, shouldFail: false}, // 4
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{dataBlocks: 7, disks: 14, offDisks: 4, badDisks: 1, badStaleDisks: 0, blocksize: int64(blockSizeV2), size: oneMiByte, algorithm: DefaultBitrotAlgorithm, shouldFail: false}, // 5
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{dataBlocks: 8, disks: 16, offDisks: 6, badDisks: 1, badStaleDisks: 1, blocksize: int64(blockSizeV2), size: oneMiByte, algorithm: DefaultBitrotAlgorithm, shouldFail: false}, // 6
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{dataBlocks: 7, disks: 14, offDisks: 2, badDisks: 3, badStaleDisks: 0, blocksize: int64(oneMiByte / 2), size: oneMiByte, algorithm: BLAKE2b512, shouldFail: false}, // 7
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{dataBlocks: 6, disks: 12, offDisks: 1, badDisks: 0, badStaleDisks: 1, blocksize: int64(oneMiByte - 1), size: oneMiByte, algorithm: DefaultBitrotAlgorithm, shouldFail: true}, // 8
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{dataBlocks: 5, disks: 10, offDisks: 3, badDisks: 0, badStaleDisks: 3, blocksize: int64(oneMiByte / 2), size: oneMiByte, algorithm: SHA256, shouldFail: true}, // 9
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{dataBlocks: 4, disks: 8, offDisks: 1, badDisks: 1, badStaleDisks: 0, blocksize: int64(blockSizeV2), size: oneMiByte, algorithm: DefaultBitrotAlgorithm, shouldFail: false}, // 10
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{dataBlocks: 2, disks: 4, offDisks: 1, badDisks: 0, badStaleDisks: 1, blocksize: int64(blockSizeV2), size: oneMiByte, algorithm: DefaultBitrotAlgorithm, shouldFail: true}, // 11
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{dataBlocks: 6, disks: 12, offDisks: 8, badDisks: 3, badStaleDisks: 0, blocksize: int64(blockSizeV2), size: oneMiByte, algorithm: DefaultBitrotAlgorithm, shouldFail: true}, // 12
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{dataBlocks: 7, disks: 14, offDisks: 3, badDisks: 4, badStaleDisks: 0, blocksize: int64(blockSizeV2), size: oneMiByte, algorithm: BLAKE2b512, shouldFail: false}, // 13
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{dataBlocks: 7, disks: 14, offDisks: 6, badDisks: 1, badStaleDisks: 0, blocksize: int64(blockSizeV2), size: oneMiByte, algorithm: DefaultBitrotAlgorithm, shouldFail: false}, // 14
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{dataBlocks: 8, disks: 16, offDisks: 4, badDisks: 5, badStaleDisks: 0, blocksize: int64(blockSizeV2), size: oneMiByte, algorithm: DefaultBitrotAlgorithm, shouldFail: true}, // 15
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{dataBlocks: 2, disks: 4, offDisks: 1, badDisks: 0, badStaleDisks: 0, blocksize: int64(blockSizeV2), size: oneMiByte, algorithm: DefaultBitrotAlgorithm, shouldFail: false}, // 16
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{dataBlocks: 12, disks: 16, offDisks: 2, badDisks: 1, badStaleDisks: 0, blocksize: int64(blockSizeV2), size: oneMiByte, algorithm: DefaultBitrotAlgorithm, shouldFail: false}, // 17
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{dataBlocks: 6, disks: 8, offDisks: 1, badDisks: 0, badStaleDisks: 0, blocksize: int64(blockSizeV2), size: oneMiByte, algorithm: BLAKE2b512, shouldFail: false}, // 18
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{dataBlocks: 2, disks: 4, offDisks: 1, badDisks: 0, badStaleDisks: 0, blocksize: int64(blockSizeV2), size: oneMiByte * 64, algorithm: SHA256, shouldFail: false}, // 19
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}
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func TestErasureHeal(t *testing.T) {
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for i, test := range erasureHealTests {
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if test.offDisks < test.badStaleDisks {
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// test case sanity check
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t.Fatalf("Test %d: Bad test case - number of stale drives cannot be less than number of badstale drives", i)
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}
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// create some test data
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setup, err := newErasureTestSetup(t, test.dataBlocks, test.disks-test.dataBlocks, test.blocksize)
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if err != nil {
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t.Fatalf("Test %d: failed to setup Erasure environment: %v", i, err)
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}
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disks := setup.disks
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erasure, err := NewErasure(t.Context(), test.dataBlocks, test.disks-test.dataBlocks, test.blocksize)
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if err != nil {
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t.Fatalf("Test %d: failed to create ErasureStorage: %v", i, err)
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}
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data := make([]byte, test.size)
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if _, err = io.ReadFull(rand.Reader, data); err != nil {
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t.Fatalf("Test %d: failed to create random test data: %v", i, err)
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}
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buffer := make([]byte, test.blocksize, 2*test.blocksize)
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writers := make([]io.Writer, len(disks))
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for i, disk := range disks {
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writers[i] = newBitrotWriter(disk, "", "testbucket", "testobject", erasure.ShardFileSize(test.size), test.algorithm, erasure.ShardSize())
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}
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_, err = erasure.Encode(t.Context(), bytes.NewReader(data), writers, buffer, erasure.dataBlocks+1)
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closeBitrotWriters(writers)
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if err != nil {
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t.Fatalf("Test %d: failed to create random test data: %v", i, err)
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}
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readers := make([]io.ReaderAt, len(disks))
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for i, disk := range disks {
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shardFilesize := erasure.ShardFileSize(test.size)
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readers[i] = newBitrotReader(disk, nil, "testbucket", "testobject", shardFilesize, test.algorithm, bitrotWriterSum(writers[i]), erasure.ShardSize())
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}
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// setup stale disks for the test case
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staleDisks := make([]StorageAPI, len(disks))
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copy(staleDisks, disks)
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for j := range staleDisks {
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if j < test.offDisks {
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readers[j] = nil
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} else {
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staleDisks[j] = nil
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}
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}
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for j := 0; j < test.badDisks; j++ {
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switch r := readers[test.offDisks+j].(type) {
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case *streamingBitrotReader:
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r.disk = badDisk{nil}
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case *wholeBitrotReader:
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r.disk = badDisk{nil}
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}
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}
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for j := 0; j < test.badStaleDisks; j++ {
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staleDisks[j] = badDisk{nil}
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}
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staleWriters := make([]io.Writer, len(staleDisks))
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for i, disk := range staleDisks {
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if disk == nil {
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continue
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}
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os.Remove(pathJoin(disk.String(), "testbucket", "testobject"))
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staleWriters[i] = newBitrotWriter(disk, "", "testbucket", "testobject", erasure.ShardFileSize(test.size), test.algorithm, erasure.ShardSize())
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}
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// test case setup is complete - now call Heal()
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err = erasure.Heal(t.Context(), staleWriters, readers, test.size, nil)
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closeBitrotReaders(readers)
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closeBitrotWriters(staleWriters)
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if err != nil && !test.shouldFail {
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t.Errorf("Test %d: should pass but it failed with: %v", i, err)
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}
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if err == nil && test.shouldFail {
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t.Errorf("Test %d: should fail but it passed", i)
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}
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if err == nil {
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// Verify that checksums of staleDisks
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// match expected values
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for i := range staleWriters {
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if staleWriters[i] == nil {
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continue
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}
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if !bytes.Equal(bitrotWriterSum(staleWriters[i]), bitrotWriterSum(writers[i])) {
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t.Errorf("Test %d: heal returned different bitrot checksums", i)
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}
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}
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}
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}
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}
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