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restic backup - handle MaxCapacityExceeded while saving a blob

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If the capacity size limit condition is activated, a TreeBlob is passed through
unharmed, so the new tree can be saved properly.

A DataBlob however, which could be very large in size will be replaced by the
data blob which contains the string "MaxCapacityExceeded\n".
This commit is contained in:
Winfried Plappert 2025-03-02 09:09:43 +00:00
parent bf227e6237
commit 612e21d42b
1 changed files with 14 additions and 0 deletions
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14
internal/archiver/blob_saver.go
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@ -68,6 +68,16 @@ type saveBlobResponse struct {
func (s *blobSaver) saveBlob(ctx context.Context, t restic.BlobType, buf []byte) (saveBlobResponse, error) {
id, known, sizeInRepo, err := s.repo.SaveBlob(ctx, t, buf, restic.ID{}, false)
if err != nil && t == restic.TreeBlob && err.Error() == "MaxCapacityExceeded" {
err = nil
}
// need to modify data for repository monitoring being triggered
if err != nil && t == restic.DataBlob && err.Error() == "MaxCapacityExceeded" {
buf = []byte("MaxCapacityExceeded\n")
id = restic.Hash(buf)
return saveBlobResponse{id: id}, err
}
if err != nil {
return saveBlobResponse{}, err
@ -95,6 +105,10 @@ func (s *blobSaver) worker(ctx context.Context, jobs <-chan saveBlobJob) error {
}
res, err := s.saveBlob(ctx, job.BlobType, job.buf.Data)
// pass through unharmed for repository monitoring
if err != nil && err.Error() == "MaxCapacityExceeded" {
err = nil
}
if err != nil {
debug.Log("saveBlob returned error, exiting: %v", err)
return fmt.Errorf("failed to save blob from file %q: %w", job.fn, err)