RFR: 8341282: (fs) Move creation time fallback logic to Java layer (Linux)

[Brian Burkhalter]

On Tue, 1 Oct 2024 08:48:12 GMT, Alan Bateman <alanb at openjdk.org> wrote:

>> Move the decision as to whether `BasicFileAttributes.creationTime()` falls back to the modified time from the native layer to the Java layer.
>
> src/java.base/unix/classes/sun/nio/fs/UnixFileAttributes.java line 167:
> 
>> 165:     @Override
>> 166:     public FileTime creationTime() {
>> 167:         if (UnixNativeDispatcher.birthtimeSupported() && !birthtime_invalid) {
> 
> If you invert and rename this from "invalid" to "valid" then it would improve the readability.

I agree as long as it initialized to `true`.

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PR Review Comment: https://git.openjdk.org/jdk/pull/21274#discussion_r1783141822