ronnie sahlberg <ronniesahlberg@xxxxxxxxx> wrote: > On Thu, 23 May 2024 at 14:54, David Disseldorp <ddiss@xxxxxxxxx> wrote: > It might be best to just ignore tests that fail in this area. And just > accept that some things, at best, is a best-effort approximation. > (as long as dataloss does not happen, of course. That is never acceptable) > At the end of the day it is a lot of guesswork and trying to fit a > square peg (unpredictable ntfs behavior) into a round hole (linux vfs > api). The problem is that it essentially renders SEEK_DATA/SEEK_HOLE unusable for applications on cifs. If there's more than one extent above the starting position, they'll fail with EIO. The only way to do it is to provide for a sufficiently large buffer to accommodate however many extents that there are (and there could be millions, in theory) in order to get just the first one. David
