svn commit: r341232 - in head/usr.bin: . trim

[Warner Losh]

On Thu, Nov 29, 2018 at 11:08 AM Eugene Grosbein <eugen at freebsd.org> wrote:

> 30.11.2018 0:52, Warner Losh wrote:
>
> > It could work on files within a filesystem, but not in its current
> state. ftruncate, however, is a better match there. None of the filesystems
> support the DIOCDELETE ioctl.
>
> However, both of UFS and ZFS issue BIO_DELETE while freeing their fs
> blocks, do they?
>

Yes. They do. You can't just open a file that's backed by ufs/zfs and issue
the DIOCGDELETE ioctl. ZFS devices, though, do honor it.

Warner