Hi, If no one is already working on it, I'd like to take the Quota lock and see how far I come. Let me sketch out in short what I'm planning to do: - Quota will be subvolume based. Only the FS-trees and data extents will be accounted. - Quota Groups can be defined. Every quota group can comprise any number of subvolumes. A subvolume can be assigned to any number of quota groups. - A Quota Group can account/limit the total amount of space that is referenced by it and/or the amount of space that is exclusively referenced (i.e. referenced by no other quota group). - With this it is possible to define a hierarchical quota that need not necessarily reflect the filesystem hierarchy. - It is also possible to decide for each snapshot if it should be accounted into the parent group. So in a scenario where each subvolume reflect a user home, it's possible to have some snapshots accounted to the user and others not (e.g. the ones needed for system backups). - Quota information will be stored in new records, possibly in a separate tree. - It should be possible to change the Quota config and group assignments online, though this might need a full re-scan of the fs. - It does NOT include any kind of user/group (UID/GID) quota. Any addenda or arguments why it's impossible or insane welcome. -Arne -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
