github.com/zuoyebang/bitalostable@v1.0.1-0.20240229032404-e3b99a834294/vfs/preallocate_linux.go (about)

     1  // Copyright 2016 The etcd Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  //go:build linux
    16  // +build linux
    17  
    18  package vfs
    19  
    20  import (
    21  	"syscall"
    22  
    23  	"golang.org/x/sys/unix"
    24  )
    25  
    26  func preallocExtend(fd uintptr, offset, length int64) error {
    27  	return syscall.Fallocate(int(fd), unix.FALLOC_FL_KEEP_SIZE, offset, length)
    28  }