github.com/metacubex/gvisor@v0.0.0-20240320004321-933faba989ec/pkg/sentry/fsimpl/host/util.go (about)

     1  // Copyright 2020 The gVisor 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  package host
    16  
    17  import (
    18  	"golang.org/x/sys/unix"
    19  	"github.com/metacubex/gvisor/pkg/abi/linux"
    20  	"github.com/metacubex/gvisor/pkg/errors/linuxerr"
    21  )
    22  
    23  func toTimespec(ts linux.StatxTimestamp, omit bool) unix.Timespec {
    24  	if omit {
    25  		return unix.Timespec{
    26  			Sec:  0,
    27  			Nsec: unix.UTIME_OMIT,
    28  		}
    29  	}
    30  	return unix.Timespec{
    31  		Sec:  ts.Sec,
    32  		Nsec: int64(ts.Nsec),
    33  	}
    34  }
    35  
    36  func unixToLinuxStatxTimestamp(ts unix.StatxTimestamp) linux.StatxTimestamp {
    37  	return linux.StatxTimestamp{Sec: ts.Sec, Nsec: ts.Nsec}
    38  }
    39  
    40  func timespecToStatxTimestamp(ts unix.Timespec) linux.StatxTimestamp {
    41  	return linux.StatxTimestamp{Sec: int64(ts.Sec), Nsec: uint32(ts.Nsec)}
    42  }
    43  
    44  // isBlockError checks if an error is EAGAIN or EWOULDBLOCK.
    45  // If so, they can be transformed into linuxerr.ErrWouldBlock.
    46  func isBlockError(err error) bool {
    47  	return linuxerr.Equals(linuxerr.EAGAIN, err) || linuxerr.Equals(linuxerr.EWOULDBLOCK, err)
    48  }