c7c1c257e1
Includes: 1. Renaming counter key to distinguish logical and physical objects 2. Version update dropping since changes could be done in a compatible way Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
99 lines
2.1 KiB
Go
99 lines
2.1 KiB
Go
package meta
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import (
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"encoding/binary"
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"fmt"
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cid "github.com/nspcc-dev/neofs-sdk-go/container/id"
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oid "github.com/nspcc-dev/neofs-sdk-go/object/id"
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"go.etcd.io/bbolt"
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)
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var objectCounterKey = []byte("phy_counter")
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// ObjectCounter returns object count that metabase has
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// tracked since it was opened and initialized.
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//
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// Returns only the errors that do not allow reading counter
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// in Bolt database.
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func (db *DB) ObjectCounter() (counter uint64, err error) {
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err = db.boltDB.View(func(tx *bbolt.Tx) error {
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b := tx.Bucket(shardInfoBucket)
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if b != nil {
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data := b.Get(objectCounterKey)
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if len(data) == 8 {
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counter = binary.LittleEndian.Uint64(data)
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}
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}
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return nil
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})
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return
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}
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// updateCounter updates the object counter. Tx MUST be writable.
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// If inc == `true`, increases the counter, decreases otherwise.
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func (db *DB) updateCounter(tx *bbolt.Tx, delta uint64, inc bool) error {
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b := tx.Bucket(shardInfoBucket)
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if b == nil {
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return nil
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}
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var counter uint64
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data := b.Get(objectCounterKey)
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if len(data) == 8 {
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counter = binary.LittleEndian.Uint64(data)
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}
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if inc {
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counter += delta
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} else if counter <= delta {
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counter = 0
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} else {
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counter -= delta
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}
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newCounter := make([]byte, 8)
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binary.LittleEndian.PutUint64(newCounter, counter)
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return b.Put(objectCounterKey, newCounter)
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}
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// syncCounter updates object counter according to metabase state:
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// it counts all the physically stored objects using internal indexes.
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// Tx MUST be writable.
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//
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// Does nothing if counter not empty.
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func syncCounter(tx *bbolt.Tx) error {
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var counter uint64
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b, err := tx.CreateBucketIfNotExists(shardInfoBucket)
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if err != nil {
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return fmt.Errorf("could not get shard info bucket: %w", err)
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}
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data := b.Get(objectCounterKey)
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if len(data) == 8 {
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return nil
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}
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err = iteratePhyObjects(tx, func(_ cid.ID, _ oid.ID) error {
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counter++
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return nil
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})
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if err != nil {
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return fmt.Errorf("count not iterate objects: %w", err)
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}
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data = make([]byte, 8)
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binary.LittleEndian.PutUint64(data, counter)
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err = b.Put(objectCounterKey, data)
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if err != nil {
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return fmt.Errorf("could not update object counter: %w", err)
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}
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return nil
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}
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