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Retry rename on lock induced failures (#16435)

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* Retry rename on lock induced failures

Due to external locking on Windows it is possible for an
os.Rename to fail if the files or directories are being
used elsewhere.

This PR simply suggests retrying the rename again similar
to how we handle the os.Remove problems.

Fix #16427

Signed-off-by: Andrew Thornton <art27@cantab.net>

* resolve CI fail

Co-authored-by: techknowlogick <techknowlogick@gitea.io>
This commit is contained in:
zeripath 2021-07-15 16:46:07 +01:00 • committed by GitHub
parent aed086f8b0
commit 33a8eec33e
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GPG key ID: 4AEE18F83AFDEB23
8 changed files with 42 additions and 14 deletions
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2
modules/log/file.go
View file

@ -177,7 +177,7 @@ func (log *FileLogger) DoRotate() error {
// close fd before rename
// Rename the file to its newfound home
if err = os.Rename(log.Filename, fname); err != nil {
if err = util.Rename(log.Filename, fname); err != nil {
return fmt.Errorf("Rotate: %v", err)
}

2
modules/storage/local.go
View file

@ -96,7 +96,7 @@ func (l *LocalStorage) Save(path string, r io.Reader, size int64) (int64, error)
return 0, err
}
if err := os.Rename(tmp.Name(), p); err != nil {
if err := util.Rename(tmp.Name(), p); err != nil {
return 0, err
}

29
modules/util/remove.go
View file

@ -33,7 +33,7 @@ func Remove(name string) error {
return err
}
// RemoveAll removes the named file or (empty) directory with at most 5 attempts.Remove
// RemoveAll removes the named file or (empty) directory with at most 5 attempts.
func RemoveAll(name string) error {
var err error
for i := 0; i < 5; i++ {
@ -55,3 +55,30 @@ func RemoveAll(name string) error {
}
return err
}
// Rename renames (moves) oldpath to newpath with at most 5 attempts.
func Rename(oldpath, newpath string) error {
var err error
for i := 0; i < 5; i++ {
err = os.Rename(oldpath, newpath)
if err == nil {
break
}
unwrapped := err.(*os.PathError).Err
if unwrapped == syscall.EBUSY || unwrapped == syscall.ENOTEMPTY || unwrapped == syscall.EPERM || unwrapped == syscall.EMFILE || unwrapped == syscall.ENFILE {
// try again
<-time.After(100 * time.Millisecond)
continue
}
if i == 0 && os.IsNotExist(err) {
return err
}
if unwrapped == syscall.ENOENT {
// it's already gone
return nil
}
}
return err
}