[VOL-4291] Rw-core updates for gRPC migration
Change-Id: I8d5a554409115b29318089671ca4e1ab3fa98810
diff --git a/vendor/github.com/coreos/etcd/wal/repair.go b/vendor/github.com/coreos/etcd/wal/repair.go
new file mode 100644
index 0000000..f1e5076
--- /dev/null
+++ b/vendor/github.com/coreos/etcd/wal/repair.go
@@ -0,0 +1,104 @@
+// Copyright 2015 The etcd Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package wal
+
+import (
+ "io"
+ "os"
+ "path/filepath"
+ "time"
+
+ "github.com/coreos/etcd/pkg/fileutil"
+ "github.com/coreos/etcd/wal/walpb"
+)
+
+// Repair tries to repair ErrUnexpectedEOF in the
+// last wal file by truncating.
+func Repair(dirpath string) bool {
+ f, err := openLast(dirpath)
+ if err != nil {
+ return false
+ }
+ defer f.Close()
+
+ rec := &walpb.Record{}
+ decoder := newDecoder(f)
+ for {
+ lastOffset := decoder.lastOffset()
+ err := decoder.decode(rec)
+ switch err {
+ case nil:
+ // update crc of the decoder when necessary
+ switch rec.Type {
+ case crcType:
+ crc := decoder.crc.Sum32()
+ // current crc of decoder must match the crc of the record.
+ // do no need to match 0 crc, since the decoder is a new one at this case.
+ if crc != 0 && rec.Validate(crc) != nil {
+ return false
+ }
+ decoder.updateCRC(rec.Crc)
+ }
+ continue
+ case io.EOF:
+ return true
+ case io.ErrUnexpectedEOF:
+ plog.Noticef("repairing %v", f.Name())
+ bf, bferr := os.Create(f.Name() + ".broken")
+ if bferr != nil {
+ plog.Errorf("could not repair %v, failed to create backup file", f.Name())
+ return false
+ }
+ defer bf.Close()
+
+ if _, err = f.Seek(0, io.SeekStart); err != nil {
+ plog.Errorf("could not repair %v, failed to read file", f.Name())
+ return false
+ }
+
+ if _, err = io.Copy(bf, f); err != nil {
+ plog.Errorf("could not repair %v, failed to copy file", f.Name())
+ return false
+ }
+
+ if err = f.Truncate(int64(lastOffset)); err != nil {
+ plog.Errorf("could not repair %v, failed to truncate file", f.Name())
+ return false
+ }
+
+ start := time.Now()
+ if err = fileutil.Fsync(f.File); err != nil {
+ plog.Errorf("could not repair %v, failed to sync file", f.Name())
+ return false
+ }
+ syncDurations.Observe(time.Since(start).Seconds())
+
+ return true
+ default:
+ plog.Errorf("could not repair error (%v)", err)
+ return false
+ }
+ }
+}
+
+// openLast opens the last wal file for read and write.
+func openLast(dirpath string) (*fileutil.LockedFile, error) {
+ names, err := readWalNames(dirpath)
+ if err != nil {
+ return nil, err
+ }
+ last := filepath.Join(dirpath, names[len(names)-1])
+ return fileutil.LockFile(last, os.O_RDWR, fileutil.PrivateFileMode)
+}