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br: fix debug decode backupmeta (#56627)
close #56296
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,134 @@ | ||
| // Copyright 2024 PingCAP, Inc. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package metautil | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "context" | ||
| "crypto/sha256" | ||
| "fmt" | ||
|
|
||
| "github.com/gogo/protobuf/proto" | ||
| "github.com/pingcap/errors" | ||
| backuppb "github.com/pingcap/kvproto/pkg/brpb" | ||
| berrors "github.com/pingcap/tidb/br/pkg/errors" | ||
| "github.com/pingcap/tidb/br/pkg/storage" | ||
| "github.com/pingcap/tidb/br/pkg/utils" | ||
| tidbutil "github.com/pingcap/tidb/pkg/util" | ||
| "golang.org/x/sync/errgroup" | ||
| ) | ||
|
|
||
| const ( | ||
| // JSONFileFormat represents json file name format | ||
| JSONFileFormat = "jsons/%s.json" | ||
| ) | ||
|
|
||
| // DecodeStatsFile decodes the stats file to json format, it is called by br debug | ||
| func DecodeStatsFile( | ||
| ctx context.Context, | ||
| s storage.ExternalStorage, | ||
| cipher *backuppb.CipherInfo, | ||
| schemas []*backuppb.Schema, | ||
| ) error { | ||
| for _, schema := range schemas { | ||
| for _, statsIndex := range schema.StatsIndex { | ||
| if len(statsIndex.Name) == 0 { | ||
| continue | ||
| } | ||
| content, err := s.ReadFile(ctx, statsIndex.Name) | ||
| if err != nil { | ||
| return errors.Trace(err) | ||
| } | ||
| decryptContent, err := utils.Decrypt(content, cipher, statsIndex.CipherIv) | ||
| if err != nil { | ||
| return errors.Trace(err) | ||
| } | ||
| checksum := sha256.Sum256(decryptContent) | ||
| if !bytes.Equal(statsIndex.Sha256, checksum[:]) { | ||
| return berrors.ErrInvalidMetaFile.GenWithStackByArgs(fmt.Sprintf( | ||
| "checksum mismatch expect %x, got %x", statsIndex.Sha256, checksum[:])) | ||
| } | ||
| statsFileBlocks := &backuppb.StatsFile{} | ||
| if err := proto.Unmarshal(decryptContent, statsFileBlocks); err != nil { | ||
| return errors.Trace(err) | ||
| } | ||
| jsonContent, err := utils.MarshalStatsFile(statsFileBlocks) | ||
| if err != nil { | ||
| return errors.Trace(err) | ||
| } | ||
| if err := s.WriteFile(ctx, fmt.Sprintf(JSONFileFormat, statsIndex.Name), jsonContent); err != nil { | ||
| return errors.Trace(err) | ||
| } | ||
| } | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| // DecodeMetaFile decodes the meta file to json format, it is called by br debug | ||
| func DecodeMetaFile( | ||
| ctx context.Context, | ||
| s storage.ExternalStorage, | ||
| cipher *backuppb.CipherInfo, | ||
| metaIndex *backuppb.MetaFile, | ||
| ) error { | ||
| if metaIndex == nil { | ||
| return nil | ||
| } | ||
| eg, ectx := errgroup.WithContext(ctx) | ||
| workers := tidbutil.NewWorkerPool(8, "download files workers") | ||
| for _, node := range metaIndex.MetaFiles { | ||
| workers.ApplyOnErrorGroup(eg, func() error { | ||
| content, err := s.ReadFile(ectx, node.Name) | ||
| if err != nil { | ||
| return errors.Trace(err) | ||
| } | ||
|
|
||
| decryptContent, err := utils.Decrypt(content, cipher, node.CipherIv) | ||
| if err != nil { | ||
| return errors.Trace(err) | ||
| } | ||
|
|
||
| checksum := sha256.Sum256(decryptContent) | ||
| if !bytes.Equal(node.Sha256, checksum[:]) { | ||
| return berrors.ErrInvalidMetaFile.GenWithStackByArgs(fmt.Sprintf( | ||
| "checksum mismatch expect %x, got %x", node.Sha256, checksum[:])) | ||
| } | ||
|
|
||
| child := &backuppb.MetaFile{} | ||
| if err = proto.Unmarshal(decryptContent, child); err != nil { | ||
| return errors.Trace(err) | ||
| } | ||
|
|
||
| // the max depth of the root metafile is only 1. | ||
| // ASSERT: len(child.MetaFiles) == 0 | ||
| if len(child.MetaFiles) > 0 { | ||
| return errors.Errorf("the metafile has unexpected level: %v", child) | ||
| } | ||
|
|
||
| jsonContent, err := utils.MarshalMetaFile(child) | ||
| if err != nil { | ||
| return errors.Trace(err) | ||
| } | ||
|
|
||
| if err := s.WriteFile(ctx, fmt.Sprintf(JSONFileFormat, node.Name), jsonContent); err != nil { | ||
| return errors.Trace(err) | ||
| } | ||
|
|
||
| err = DecodeStatsFile(ctx, s, cipher, child.Schemas) | ||
| return errors.Trace(err) | ||
| }) | ||
| } | ||
| return eg.Wait() | ||
| } |
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