Hi!
> >>> Hmm, really? AFAICT it would be simple to provide an
> >>> open_deleted_file("directory") syscall. You'd open_deleted_file(),
> >>> copy source file into it, then fsync(), then link it into filesystem.
> >>>
> >>> That should have atomicity properties reflected.
> >>
> >> Actually, the open_deleted_file() syscall is quite useful for many
> >> different things all by itself. Lots of applications need to create
> >> temporary files that are unlinked at application failure (without a
> >> race if app crashes after creating the file, but before unlinking).
> >> It also avoids exposing temporary files into the namespace if other
> >> applications are accessing the directory.
> >
> > Hmm. open_deleted_file() will still need to get a directory... so it
> > will still need a path. Perhaps open("/foo/bar/mnt", O_DELETED) would
> > be acceptable interface?
>
> ...and what's the big plan to make this work on anything other than ext4 and
> btrfs?
Deleted but open files are from original unix, so it should work on
anything unixy (minix, ext, ext2, ...).
Pavel
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