52 lines
1.5 KiB
Go
52 lines
1.5 KiB
Go
//go:build linux || netbsd || freebsd
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// +build linux netbsd freebsd
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// Copyright (c) 2015-2021 MinIO, Inc.
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//
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// This file is part of MinIO Object Storage stack
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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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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// AlignedBlock - pass through to directio implementation.
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func AlignedBlock(BlockSize int) []byte {
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return directio.AlignedBlock(BlockSize)
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}
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