frostfs-node/pkg/local_object_storage/shard/exists.go
Evgenii Stratonikov f058cead8f [#1143] shard: Handle some errors in degraded mode
If metabase is corrupted for some reason, failback to
checking blobstor directly.

Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
2022-03-31 15:33:22 +03:00

63 lines
1.6 KiB
Go

package shard
import (
"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor"
meta "github.com/nspcc-dev/neofs-node/pkg/local_object_storage/metabase"
addressSDK "github.com/nspcc-dev/neofs-sdk-go/object/address"
"go.uber.org/zap"
)
// ExistsPrm groups the parameters of Exists operation.
type ExistsPrm struct {
addr *addressSDK.Address
}
// ExistsRes groups resulting values of Exists operation.
type ExistsRes struct {
ex bool
}
// WithAddress is an Exists option to set object checked for existence.
func (p *ExistsPrm) WithAddress(addr *addressSDK.Address) *ExistsPrm {
if p != nil {
p.addr = addr
}
return p
}
// Exists returns the fact that the object is in the shard.
func (p *ExistsRes) Exists() bool {
return p.ex
}
// Exists checks if object is presented in shard.
//
// Returns any error encountered that does not allow to
// unambiguously determine the presence of an object.
//
// Returns an error of type apistatus.ObjectAlreadyRemoved if object has been marked as removed.
func (s *Shard) Exists(prm *ExistsPrm) (*ExistsRes, error) {
exists, err := meta.Exists(s.metaBase, prm.addr)
if err != nil {
// If the shard is in degraded mode, try to consult blobstor directly.
// Otherwise, just return an error.
if s.GetMode() == ModeDegraded {
p := new(blobstor.ExistsPrm)
p.SetAddress(prm.addr)
res, bErr := s.blobStor.Exists(p)
if bErr == nil {
exists = res.Exists()
s.log.Warn("metabase existence check finished with error",
zap.Stringer("address", prm.addr),
zap.String("error", err.Error()))
err = nil
}
}
}
return &ExistsRes{
ex: exists,
}, err
}