frostfs-node/pkg/local_object_storage/metabase/storage_id.go
Pavel Karpy fdeea1dfac [#2057] meta: Fix concurrent mode changes
Includes:
1. mode change read lock operation in every exported method that r/w the
underlying database;
2. returning `ErrDegradedMode` logical error if any exported method is
called in degraded (without a metabase) mode.

Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
2022-11-19 11:01:04 +03:00

102 lines
2.4 KiB
Go

package meta
import (
"github.com/nspcc-dev/neo-go/pkg/util/slice"
oid "github.com/nspcc-dev/neofs-sdk-go/object/id"
"go.etcd.io/bbolt"
)
// StorageIDPrm groups the parameters of StorageID operation.
type StorageIDPrm struct {
addr oid.Address
}
// StorageIDRes groups the resulting values of StorageID operation.
type StorageIDRes struct {
id []byte
}
// SetAddress is a StorageID option to set the object address to check.
func (p *StorageIDPrm) SetAddress(addr oid.Address) {
p.addr = addr
}
// StorageID returns storage ID.
func (r StorageIDRes) StorageID() []byte {
return r.id
}
// StorageID returns storage descriptor for objects from the blobstor.
// It is put together with the object can makes get/delete operation faster.
func (db *DB) StorageID(prm StorageIDPrm) (res StorageIDRes, err error) {
db.modeMtx.RLock()
defer db.modeMtx.RUnlock()
if db.mode.NoMetabase() {
return res, ErrDegradedMode
}
err = db.boltDB.View(func(tx *bbolt.Tx) error {
res.id, err = db.storageID(tx, prm.addr)
return err
})
return
}
func (db *DB) storageID(tx *bbolt.Tx, addr oid.Address) ([]byte, error) {
key := make([]byte, bucketKeySize)
smallBucket := tx.Bucket(smallBucketName(addr.Container(), key))
if smallBucket == nil {
return nil, nil
}
storageID := smallBucket.Get(objectKey(addr.Object(), key))
if storageID == nil {
return nil, nil
}
return slice.Copy(storageID), nil
}
// UpdateStorageIDPrm groups the parameters of UpdateStorageID operation.
type UpdateStorageIDPrm struct {
addr oid.Address
id []byte
}
// UpdateStorageIDRes groups the resulting values of UpdateStorageID operation.
type UpdateStorageIDRes struct{}
// SetAddress is an UpdateStorageID option to set the object address to check.
func (p *UpdateStorageIDPrm) SetAddress(addr oid.Address) {
p.addr = addr
}
// SetStorageID is an UpdateStorageID option to set the storage ID.
func (p *UpdateStorageIDPrm) SetStorageID(id []byte) {
p.id = id
}
// UpdateStorageID updates storage descriptor for objects from the blobstor.
func (db *DB) UpdateStorageID(prm UpdateStorageIDPrm) (res UpdateStorageIDRes, err error) {
db.modeMtx.RLock()
defer db.modeMtx.RUnlock()
if db.mode.NoMetabase() {
return res, ErrDegradedMode
}
currEpoch := db.epochState.CurrentEpoch()
err = db.boltDB.Batch(func(tx *bbolt.Tx) error {
exists, err := db.exists(tx, prm.addr, currEpoch)
if !exists || err != nil {
return err
}
return updateStorageID(tx, prm.addr, prm.id)
})
return
}