4.5 merge window part 3

XFS_IOC_[GS]ETXATTR is definitely documented, like all the XFS ioctls are. See the xfsctl(3) man page. No, there hasn't been a new man page written for FS_IOC versions yet.

XFS project quotas are documented in xfs_quota(8), projid(5), projects(5) and xfsctl(3). The ext4 project quota implementation is supposed to be API and behaviourally identical to XFS project quota (hence the above ioctl move, which is how XFS sets and clears project quota IDs on inodes).

However, AFAIK none of that has been tested, because the there is no userspace for the ext4 code yet, and no tests in xfstests that exercise it. I only wrote the patches to make xfs_quota work with non-xfs filesystems a couple of weeks ago so that the XFS specific project quota tests can be made to run on ext4 without serious modification.

-Dave.