minio/cmd/xl-storage-errors.go
Harshavardhana df93102235
fix: unwrapping issues with os.Is* functions (#10949)
reduces  3 stat calls, reducing the
overall startup time significantly.
2020-11-23 08:36:49 -08:00

151 lines
3.8 KiB
Go

/*
* MinIO Cloud Storage, (C) 2016-2020 MinIO, Inc.
*
* 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 cmd
import (
"errors"
"os"
"runtime"
"syscall"
)
// Function not implemented error
func isSysErrNoSys(err error) bool {
return errors.Is(err, syscall.ENOSYS)
}
// Not supported error
func isSysErrOpNotSupported(err error) bool {
return errors.Is(err, syscall.EOPNOTSUPP)
}
// No space left on device error
func isSysErrNoSpace(err error) bool {
return errors.Is(err, syscall.ENOSPC)
}
// Invalid argument, unsupported flags such as O_DIRECT
func isSysErrInvalidArg(err error) bool {
return errors.Is(err, syscall.EINVAL)
}
// Input/output error
func isSysErrIO(err error) bool {
return errors.Is(err, syscall.EIO)
}
// Check if the given error corresponds to EISDIR (is a directory).
func isSysErrIsDir(err error) bool {
return errors.Is(err, syscall.EISDIR)
}
// Check if the given error corresponds to ENOTDIR (is not a directory).
func isSysErrNotDir(err error) bool {
return errors.Is(err, syscall.ENOTDIR)
}
// Check if the given error corresponds to the ENAMETOOLONG (name too long).
func isSysErrTooLong(err error) bool {
return errors.Is(err, syscall.ENAMETOOLONG)
}
// Check if the given error corresponds to the ELOOP (too many symlinks).
func isSysErrTooManySymlinks(err error) bool {
return errors.Is(err, syscall.ELOOP)
}
// Check if the given error corresponds to ENOTEMPTY for unix,
// EEXIST for solaris variants,
// and ERROR_DIR_NOT_EMPTY for windows (directory not empty).
func isSysErrNotEmpty(err error) bool {
if errors.Is(err, syscall.ENOTEMPTY) {
return true
}
if errors.Is(err, syscall.EEXIST) && runtime.GOOS == "solaris" {
return true
}
var pathErr *os.PathError
if errors.As(err, &pathErr) {
if runtime.GOOS == globalWindowsOSName {
var errno syscall.Errno
if errors.As(pathErr.Err, &errno) {
// ERROR_DIR_NOT_EMPTY
return errno == 0x91
}
}
}
return false
}
// Check if the given error corresponds to the specific ERROR_PATH_NOT_FOUND for windows
func isSysErrPathNotFound(err error) bool {
if runtime.GOOS != globalWindowsOSName {
var pathErr *os.PathError
if errors.As(err, &pathErr) {
return pathErr.Err == syscall.ENOENT
}
return false
}
var pathErr *os.PathError
if errors.As(err, &pathErr) {
var errno syscall.Errno
if errors.As(pathErr.Err, &errno) {
// ERROR_PATH_NOT_FOUND
return errno == 0x03
}
}
return false
}
// Check if the given error corresponds to the specific ERROR_INVALID_HANDLE for windows
func isSysErrHandleInvalid(err error) bool {
if runtime.GOOS != globalWindowsOSName {
return false
}
// Check if err contains ERROR_INVALID_HANDLE errno
var pathErr *os.PathError
if errors.As(err, &pathErr) {
var errno syscall.Errno
if errors.As(pathErr.Err, &errno) {
// ERROR_PATH_NOT_FOUND
return errno == 0x6
}
}
return false
}
func isSysErrCrossDevice(err error) bool {
return errors.Is(err, syscall.EXDEV)
}
// Check if given error corresponds to too many open files
func isSysErrTooManyFiles(err error) bool {
return errors.Is(err, syscall.ENFILE) || errors.Is(err, syscall.EMFILE)
}
func osIsNotExist(err error) bool {
return errors.Is(err, os.ErrNotExist)
}
func osIsPermission(err error) bool {
return errors.Is(err, os.ErrPermission)
}
func osIsExist(err error) bool {
return errors.Is(err, os.ErrExist)
}