From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dmitry Monakhov Subject: [PATCH 0/5] RFC: introduce extended inode owner identifier v9 Date: Thu, 21 Jun 2012 13:08:48 +0400 Message-ID: <1340269733-25922-1-git-send-email-dmonakhov@openvz.org> Cc: linux-fsdevel@vger.kernel.org, Dmitry Monakhov To: linux-ext4@vger.kernel.org Return-path: Sender: linux-ext4-owner@vger.kernel.org List-Id: linux-fsdevel.vger.kernel.org Hi, I've updated old standing project quota id patch-set. Please take a look at it and replay me your oppinion, especially if you do not like it by some reason :) This is really important because i do want this feature to be merged sooner or later. *Feature description* 1) Inode may has a project identifier which has same meaning as uid/gid. 2) In general case Id is stored in inode's xattr named "system.project_id" NOTE: by historical reasons XFS has speciffic API, 3) Id is inherent from parent inode on creation. 4) This id is cached in memory fs_inode structure and may be accessible via s_op->get_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) *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 utilities tar/rsync and etc PATCH SET TOC: 1) generic projectid support 2) generic project quota support 3) ext4: small mount flags cleanup 4) ext4 project support implementation 4A) ext4: generic project support 4B) ext4: project quota support NOTE:Ext4 quota is now managed via e2fsprogs, changes which add prjquota suppport for e2fsprogs will be submitted as separate patch-set. 5) XFS: prjquota and grpquota may coexist now Patch against next-20120605-1-g20a6ee4 Actually vfs part is really small, and most changes happen in ext4-tree Changes against V7 - Small fix for project switch error path - Remove usless macro expressions Changes against v6 - get rid of iattr stuff, current __dquot_transfer() provides sane interface for quota manipulation. i_prjid can must be changed only by fs-speciffic methods so only get() method is really necessery. - remove #ifdef tricks from generic code. - move i_prjid from vfs_inode to fs_inode, to prevent inode bloating. - get rid of isolation logic, because this feature confuse most users. Changes against v5 - convert dquota_transfer to struct iattr interface. Not it is possible to change i_prjid via notify_changes() - some bugfixes. Signed-off-by: Dmitry Monakhov --- Makefile | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/Makefile b/Makefile index 0d718ed..8dbcc39 100644 --- a/Makefile +++ b/Makefile @@ -2,7 +2,7 @@ VERSION = 3 PATCHLEVEL = 5 SUBLEVEL = 0 EXTRAVERSION = -rc1 -NAME = Saber-toothed Squirrel +NAME = Saber-toothed Squirrel-tree-quota # *DOCUMENTATION* # To see a list of typical targets execute "make help" -- 1.7.1