mirror of
https://github.com/etcd-io/etcd.git
synced 2024-09-27 06:25:44 +00:00
68 lines
2.1 KiB
Go
68 lines
2.1 KiB
Go
// Copyright 2021 The etcd Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package schema
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import (
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"github.com/coreos/go-semver/semver"
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"go.etcd.io/bbolt"
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"go.etcd.io/etcd/server/v3/storage/backend"
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)
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// ReadStorageVersion loads storage version from given backend transaction.
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// Populated since v3.6
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func ReadStorageVersion(tx backend.ReadTx) *semver.Version {
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tx.Lock()
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defer tx.Unlock()
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return UnsafeReadStorageVersion(tx)
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}
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// UnsafeReadStorageVersion loads storage version from given backend transaction.
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// Populated since v3.6
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func UnsafeReadStorageVersion(tx backend.ReadTx) *semver.Version {
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_, vs := tx.UnsafeRange(Meta, MetaStorageVersionName, nil, 1)
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if len(vs) == 0 {
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return nil
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}
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v, err := semver.NewVersion(string(vs[0]))
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if err != nil {
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return nil
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}
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return v
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}
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// ReadStorageVersionFromSnapshot loads storage version from given bbolt transaction.
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// Populated since v3.6
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func ReadStorageVersionFromSnapshot(tx *bbolt.Tx) *semver.Version {
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v := tx.Bucket(Meta.Name()).Get(MetaStorageVersionName)
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version, err := semver.NewVersion(string(v))
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if err != nil {
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return nil
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}
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return version
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}
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// UnsafeSetStorageVersion updates etcd storage version in backend.
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// Populated since v3.6
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func UnsafeSetStorageVersion(tx backend.BatchTx, v *semver.Version) {
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sv := semver.Version{Major: v.Major, Minor: v.Minor}
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tx.UnsafePut(Meta, MetaStorageVersionName, []byte(sv.String()))
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}
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// UnsafeClearStorageVersion removes etcd storage version in backend.
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func UnsafeClearStorageVersion(tx backend.BatchTx) {
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tx.UnsafeDelete(Meta, MetaStorageVersionName)
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}
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