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move_object.go
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move_object.go
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// Copyright (C) 2021 Storj Labs, Inc.
// See LICENSE for copying information.
package metabase
import (
"context"
"database/sql"
"errors"
"storj.io/common/storj"
"storj.io/common/uuid"
"storj.io/private/dbutil/pgutil"
"storj.io/private/dbutil/txutil"
"storj.io/private/tagsql"
)
// BeginMoveObjectResult holds data needed to finish move object.
type BeginMoveObjectResult struct {
StreamID uuid.UUID
// TODO we need metadata because of an uplink issue with how we are storing key and nonce
EncryptedMetadata []byte
EncryptedMetadataKeyNonce []byte
EncryptedMetadataKey []byte
EncryptedKeysNonces []EncryptedKeyAndNonce
EncryptionParameters storj.EncryptionParameters
}
// EncryptedKeyAndNonce holds single segment position, encrypted key and nonce.
type EncryptedKeyAndNonce struct {
Position SegmentPosition
EncryptedKeyNonce []byte
EncryptedKey []byte
}
// BeginMoveObject holds all data needed begin move object method.
type BeginMoveObject struct {
Version Version
ObjectLocation
}
// BeginMoveObject collects all data needed to begin object move procedure.
func (db *DB) BeginMoveObject(ctx context.Context, opts BeginMoveObject) (result BeginMoveObjectResult, err error) {
defer mon.Task()(&ctx)(&err)
if err := opts.ObjectLocation.Verify(); err != nil {
return BeginMoveObjectResult{}, err
}
if opts.Version <= 0 {
return BeginMoveObjectResult{}, ErrInvalidRequest.New("Version invalid: %v", opts.Version)
}
var segmentCount int64
err = db.db.QueryRowContext(ctx, `
SELECT
stream_id, encryption, segment_count,
encrypted_metadata_encrypted_key, encrypted_metadata_nonce, encrypted_metadata
FROM objects
WHERE
project_id = $1 AND
bucket_name = $2 AND
object_key = $3 AND
version = $4 AND
status = `+committedStatus,
opts.ProjectID, []byte(opts.BucketName), opts.ObjectKey, opts.Version).
Scan(
&result.StreamID,
encryptionParameters{&result.EncryptionParameters},
&segmentCount,
&result.EncryptedMetadataKey, &result.EncryptedMetadataKeyNonce, &result.EncryptedMetadata,
)
if err != nil {
if errors.Is(err, sql.ErrNoRows) {
return BeginMoveObjectResult{}, storj.ErrObjectNotFound.Wrap(err)
}
return BeginMoveObjectResult{}, Error.New("unable to query object status: %w", err)
}
if segmentCount > MoveLimit {
return BeginMoveObjectResult{}, Error.New("segment count of chosen object is beyond limit")
}
err = withRows(db.db.QueryContext(ctx, `
SELECT
position, encrypted_key_nonce, encrypted_key
FROM segments
WHERE stream_id = $1
ORDER BY stream_id, position ASC
`, result.StreamID))(func(rows tagsql.Rows) error {
for rows.Next() {
var keys EncryptedKeyAndNonce
err = rows.Scan(&keys.Position, &keys.EncryptedKeyNonce, &keys.EncryptedKey)
if err != nil {
return Error.New("failed to scan segments: %w", err)
}
result.EncryptedKeysNonces = append(result.EncryptedKeysNonces, keys)
}
return nil
})
if err != nil && !errors.Is(err, sql.ErrNoRows) {
return BeginMoveObjectResult{}, Error.New("unable to fetch object segments: %w", err)
}
return result, nil
}
// FinishMoveObject holds all data needed to finish object move.
type FinishMoveObject struct {
ObjectStream
NewBucket string
NewSegmentKeys []EncryptedKeyAndNonce
NewEncryptedObjectKey []byte
NewEncryptedMetadataKeyNonce []byte
NewEncryptedMetadataKey []byte
}
// Verify verifies metabase.FinishMoveObject data.
func (finishMove FinishMoveObject) Verify() error {
if err := finishMove.ObjectStream.Verify(); err != nil {
return err
}
switch {
case len(finishMove.NewBucket) == 0:
return ErrInvalidRequest.New("NewBucket is missing")
case len(finishMove.NewEncryptedObjectKey) == 0:
return ErrInvalidRequest.New("NewEncryptedObjectKey is missing")
case len(finishMove.NewEncryptedMetadataKeyNonce) == 0:
return ErrInvalidRequest.New("EncryptedMetadataKeyNonce is missing")
case len(finishMove.NewEncryptedMetadataKey) == 0:
return ErrInvalidRequest.New("EncryptedMetadataKey is missing")
}
return nil
}
// FinishMoveObject accepts new encryption keys for moved object and updates the corresponding object ObjectKey and segments EncryptedKey.
func (db *DB) FinishMoveObject(ctx context.Context, opts FinishMoveObject) (err error) {
defer mon.Task()(&ctx)(&err)
if err := opts.Verify(); err != nil {
return err
}
err = txutil.WithTx(ctx, db.db, nil, func(ctx context.Context, tx tagsql.Tx) (err error) {
updateObjectsQuery := `
UPDATE objects SET
bucket_name = $1,
object_key = $2,
encrypted_metadata_encrypted_key = $3,
encrypted_metadata_nonce = $4
WHERE
project_id = $5 AND
bucket_name = $6 AND
object_key = $7 AND
version = $8 AND
stream_id = $9
RETURNING
segment_count;
`
var segmentsCount int
row := db.db.QueryRowContext(ctx, updateObjectsQuery, []byte(opts.NewBucket), opts.NewEncryptedObjectKey, opts.NewEncryptedMetadataKey, opts.NewEncryptedMetadataKeyNonce, opts.ProjectID, []byte(opts.BucketName), opts.ObjectKey, opts.Version, opts.StreamID)
if err = row.Scan(&segmentsCount); err != nil {
if errors.Is(err, sql.ErrNoRows) {
return storj.ErrObjectNotFound.New("object not found")
}
return Error.New("unable to update object: %w", err)
}
if segmentsCount != len(opts.NewSegmentKeys) {
return ErrInvalidRequest.New("wrong amount of segments keys received")
}
var newSegmentKeys struct {
Positions []int64
EncryptedKeys [][]byte
EncryptedKeyNonces [][]byte
}
for _, u := range opts.NewSegmentKeys {
newSegmentKeys.EncryptedKeys = append(newSegmentKeys.EncryptedKeys, u.EncryptedKey)
newSegmentKeys.EncryptedKeyNonces = append(newSegmentKeys.EncryptedKeyNonces, u.EncryptedKeyNonce)
newSegmentKeys.Positions = append(newSegmentKeys.Positions, int64(u.Position.Encode()))
}
updateResult, err := db.db.ExecContext(ctx, `
UPDATE segments SET
encrypted_key_nonce = P.encrypted_key_nonce,
encrypted_key = P.encrypted_key
FROM (SELECT unnest($2::INT8[]), unnest($3::BYTEA[]), unnest($4::BYTEA[])) as P(position, encrypted_key_nonce, encrypted_key)
WHERE
stream_id = $1 AND
segments.position = P.position
`, opts.StreamID, pgutil.Int8Array(newSegmentKeys.Positions), pgutil.ByteaArray(newSegmentKeys.EncryptedKeyNonces), pgutil.ByteaArray(newSegmentKeys.EncryptedKeys))
if err != nil {
return Error.Wrap(err)
}
affected, err := updateResult.RowsAffected()
if err != nil {
return Error.New("failed to get rows affected: %w", err)
}
if affected != int64(len(newSegmentKeys.Positions)) {
return Error.New("segment is missing")
}
return nil
})
if err != nil {
return err
}
mon.Meter("finish_move_object").Mark(1)
return nil
}