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45 lines
1.2 KiB
45 lines
1.2 KiB
6 years ago
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// +build linux netbsd freebsd
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/*
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* Minio Cloud Storage, (C) 2019 Minio, Inc.
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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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*/
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package disk
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import (
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"os"
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"syscall"
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"github.com/ncw/directio"
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"golang.org/x/sys/unix"
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)
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// OpenFileDirectIO - bypass kernel cache.
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func OpenFileDirectIO(filePath string, flag int, perm os.FileMode) (*os.File, error) {
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return directio.OpenFile(filePath, flag, perm)
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}
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// DisableDirectIO - disables directio mode.
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func DisableDirectIO(f *os.File) error {
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fd := f.Fd()
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flag, err := unix.FcntlInt(fd, unix.F_GETFL, 0)
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if err != nil {
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return err
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}
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flag = flag & ^(syscall.O_DIRECT)
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_, err = unix.FcntlInt(fd, unix.F_SETFL, flag)
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return err
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}
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