On Mon, Nov 15, 2021 at 07:00:18PM +0800, Jubin Zhong wrote: > From: zhongjubin <zhongjubin@xxxxxxxxxx> > > Syscall truncate() never updates m/ctime even if the file size is > changed. However, this is incorrect according to man file: > > truncate (2): > If the size changed, then the st_ctime and st_mtime fields > (respectively, time of last status change and time of last modification; > see stat(2)) for the file are updated, and the set-user-ID and > set-group-ID mode bits may be cleared. > > Check file size before do_truncate() to fix this. Please try to actually reproduce your alleged "bug". And maybe also look at the actual setattr implementations. Hint: The XFS one even has extensive comments.
