Phillip Susi wrote:
How exactly are xattrs stored on disk? Is it possible and efficient to store a dozen xattrs on a file of various sizes from 1kb to several MB? How would you reconcile the two different sets of owner and access information associated with the file? For instance, if someone creates a file on the partition from Linux, then you mount it with ROS, who owns the file? Who has access to it? Linux would only place some meaningless uid and chmod mask in the inode, so how would ROS come up with a sensible security descriptor for the file when one does not already exist?
These are the kinds of problems that make attempts for ReactOS to share a unix filesystem ( and vice versa ) kludgey at best.
You get the same problems when sharing an NTFS filesystem on a dual-boot system or when moving one between computers, unless the SIDs are well-known. I would suggest you check out the Samba presentation at the following URL for information on how Samba4 does NTFS->Unix permissions conversion so you are not stabbing in the dark: http://wiki.winehq.org/WineConf
The problem you are describing has already been solved by them in a slightly-not-kludgey way.
Rob