On Mon, May 24, 2021 at 10:49:12AM +0200, Jan Kara wrote: > On Wed 12-05-21 17:03:46, Sascha Hauer wrote: > > On Wed, May 12, 2021 at 01:01:49PM +0200, Jan Kara wrote: > > > Added a few more CCs. > > > > > > On Tue 16-03-21 12:29:16, Jan Kara wrote: > > > > On Thu 04-03-21 13:35:38, Sascha Hauer wrote: > > > > > Current quotactl syscall uses a path to a block device to specify the > > > > > filesystem to work on which makes it unsuitable for filesystems that > > > > > do not have a block device. This series adds a new syscall quotactl_path() > > > > > which replaces the path to the block device with a mountpath, but otherwise > > > > > behaves like original quotactl. > > > > > > > > > > This is done to add quota support to UBIFS. UBIFS quota support has been > > > > > posted several times with different approaches to put the mountpath into > > > > > the existing quotactl() syscall until it has been suggested to make it a > > > > > new syscall instead, so here it is. > > > > > > > > > > I'm not posting the full UBIFS quota series here as it remains unchanged > > > > > and I'd like to get feedback to the new syscall first. For those interested > > > > > the most recent series can be found here: https://lwn.net/Articles/810463/ > > > > > > > > Thanks. I've merged the two patches into my tree and will push them to > > > > Linus for the next merge window. > > > > > > So there are some people at LWN whining that quotactl_path() has no dirfd > > > and flags arguments for specifying the target. Somewhat late in the game > > > but since there's no major release with the syscall and no userspace using > > > it, I think we could still change that. What do you think? What they > > > suggest does make some sense. But then, rather then supporting API for > > > million-and-one ways in which I may wish to lookup a fs object, won't it be > > > better to just pass 'fd' in the new syscall (it may well be just O_PATH fd > > > AFAICT) and be done with that? > > > > This sounds like a much cleaner interface to me. If we agree on this I > > wouldn't mind spinning this patch for another few rounds. > > So the syscall is currently disabled in Linus' tree. Will you send a patch > for new fd-based quotactl variant? I'll sure do that, but I don't know when I can find a timeslot for it. I hope I can come up with something next month. Sascha -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
