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internal/poll: treat copy_file_range EIO as not-handled

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Fixes #42334

Change-Id: Ife51df4e7d2539a04393abfdec45e3f902975fca
Reviewed-on: https://go-review.googlesource.com/c/go/+/266940
Trust: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Tobias Klauser 2020-11-02 12:01:33 +01:00 committed by Tobias Klauser
parent 5ca43acdb3
commit 633f9e2060
1 changed files with 4 additions and 1 deletions
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5
src/internal/poll/copy_file_range_linux.go
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@ -41,7 +41,7 @@ func CopyFileRange(dst, src *FD, remain int64) (written int64, handled bool, err
// use copy_file_range(2) again.
atomic.StoreInt32(&copyFileRangeSupported, 0)
return 0, false, nil
case syscall.EXDEV, syscall.EINVAL, syscall.EOPNOTSUPP, syscall.EPERM:
case syscall.EXDEV, syscall.EINVAL, syscall.EIO, syscall.EOPNOTSUPP, syscall.EPERM:
// Prior to Linux 5.3, it was not possible to
// copy_file_range across file systems. Similarly to
// the ENOSYS case above, if we see EXDEV, we have
@ -53,6 +53,9 @@ func CopyFileRange(dst, src *FD, remain int64) (written int64, handled bool, err
// file. This is another case where no data has been
// transfered, so we consider it unhandled.
//
// If src and dst are on CIFS, we can see EIO.
// See issue #42334.
//
// If the file is on NFS, we can see EOPNOTSUPP.
// See issue #40731.
//