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restore: cleanup downloadPack

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This commit is contained in:
Michael Eischer 2024-01-07 12:06:36 +01:00
parent b856e9489a
commit cf352ccafb
1 changed files with 11 additions and 8 deletions
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19
internal/restorer/filerestorer.go
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@ -199,18 +199,18 @@ func (r *fileRestorer) restoreFiles(ctx context.Context) error {
type blobToFileOffsetsMapping map[restic.ID]struct {
files map[*fileInfo][]int64 // file -> offsets (plural!) of the blob in the file
blob restic.Blob
}
func (r *fileRestorer) downloadPack(ctx context.Context, pack *packInfo) error {
// calculate blob->[]files->[]offsets mappings
blobs := make(blobToFileOffsetsMapping)
var blobList []restic.Blob
for file := range pack.files {
addBlob := func(blob restic.Blob, fileOffset int64) {
blobInfo, ok := blobs[blob.ID]
if !ok {
blobInfo.files = make(map[*fileInfo][]int64)
blobList = append(blobList, blob)
blobInfo.blob = blob
blobs[blob.ID] = blobInfo
}
blobInfo.files[file] = append(blobInfo.files[file], fileOffset)
@ -242,17 +242,16 @@ func (r *fileRestorer) downloadPack(ctx context.Context, pack *packInfo) error {
// track already processed blobs for precise error reporting
processedBlobs := restic.NewBlobSet()
err := r.downloadBlobs(ctx, pack.id, blobList, blobs, processedBlobs)
err := r.downloadBlobs(ctx, pack.id, blobs, processedBlobs)
if err != nil {
// only report error for not yet processed blobs
affectedFiles := make(map[*fileInfo]struct{})
for _, blob := range blobList {
if processedBlobs.Has(blob.BlobHandle) {
for _, entry := range blobs {
if processedBlobs.Has(entry.blob.BlobHandle) {
continue
}
blob := blobs[blob.ID]
for file := range blob.files {
for file := range entry.files {
affectedFiles[file] = struct{}{}
}
}
@ -274,9 +273,13 @@ func (r *fileRestorer) sanitizeError(file *fileInfo, err error) error {
return err
}
func (r *fileRestorer) downloadBlobs(ctx context.Context, packID restic.ID, blobList []restic.Blob,
func (r *fileRestorer) downloadBlobs(ctx context.Context, packID restic.ID,
blobs blobToFileOffsetsMapping, processedBlobs restic.BlobSet) error {
blobList := make([]restic.Blob, 0, len(blobs))
for _, entry := range blobs {
blobList = append(blobList, entry.blob)
}
return repository.StreamPack(ctx, r.packLoader, r.key, packID, blobList,
func(h restic.BlobHandle, blobData []byte, err error) error {
processedBlobs.Insert(h)