Hi all, I'm currently working on resurrecting the UBIFS quota patches posted back in 2015 by Dongsheng Yang, last posted here: http://lists.infradead.org/pipermail/linux-mtd/2015-September/061812.html First of all I think work stopped there, there is no newer UBIFS quota support I am missing, right? One problem with this series was that the quotactl systemcall expects a path to a block device. UBIFS doesn't work on a block device but on a character device instead. The solution in this series was to pass the path to the cdev in quotactl. A struct cdev * member was added to struct super_block which was used to identify the superblock for a given cdev. This approach was rejected by Christoph ("I don't think the cdev has any business in core VFS code."). Apart from that UBIFS can not only be mounted with a path to the character device (mount -t ubifs /dev/ubix_y /mnt) but also in the form ubix:volname (mount -t ubifs ubix:volname /mnt) in which case userspace doesn't have any valid path it could pass in quotactl. An idea out of this would be to allow to pass the mountpoint instead of the path to the block device in quotactl which would work with nfs or even tmpfs aswell. Would that be acceptable? Any other ideas? Sascha -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
