Dmitry Monakhov <dmonakhov@xxxxxxxxxx> writes: > This is 6'th version of extened inode owner patch-set. > Please review it tell me what do you think about all this. > Are you agree with this approach? > Are you worry about some implementation details? > Is it ready for merge to some devel's tree? Ping. I haven't got response about the patchset, just small note about xattr-name from Andreas. Please clarify what do you think about whole idea and current patch-set state. What do i have to do to make a progress? > > *Feature description* > 1) Inode may has a project identifier which has same meaning as uid/gid. > 2) Id is stored in inode's xattr named "system.project_id" > 3) Id is inherent from parent inode on creation. > 4) This id is cached in memory inode structure vfs_inode->i_prjid > This field it restricted by CONFIG_PROJECT_ID. So no wasting > of memory happens. > > 5) Since id is cached in memory it may be used for different purposes > such as: > 5A) Implement additional quota id space orthogonal to uid/gid. This is > useful in managing quota for some filesystem hierarchy(chroot or > container over bindmount) > 5B) Export dedicated fs hierarchy to nfsd (only inode which has some > project_id will be accessible via nfsd) > > 6) It is possible to create isolated project's subtree. > Note: Please do not blame isolation feature before you read the > isolation patch description, and than please wellcome. > > *User interface * > Project id is managed via generic xattr interface "system.project_id" > This good because > 1) We may use already existing interface. > 2) xattr already supported by generic urils tar/rsync and etc > > PATCH SET TOC: > 1) generic projectid support > 2) generic project quota support > 3) ext4 project support implementation > 3A) ext4: generic project support > 3B) ext4: project quota support > 3C) ext4: project isolation support. This patch is not principal > but makes ext4 implementation rename behaviour equotals > to XFS > > Patch against linux-next-20100318 > Changes against v5 > - convert dquota_transfer to struct iattr interface. Not it is possible > to change i_prjid via notify_changes() > - some bugfixes. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
