| Message ID | 1341847725-26114-1-git-send-email-dmonakhov@openvz.org |
|---|---|
| State | Accepted, archived |
| Headers | show |
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"
Hi, Here is updated version subtree-quota pachset *Feature description* 1) Inode may has a subtree identifier which has same meaning as uid/gid. 2) In general case Id is stored in inode's xattr named "system.subtree" 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_subtree(). This field it restricted by CONFIG_SUBTREE. 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) 6) In comparison to XFS's project ID feature it does not affect rename(2)/link(2) in case of cross tries transfer *User interface * Subtree id is managed via generic xattr interface "system.subtree" 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 subtree support 2) ext4: generic subtree support 3) ext4: subtree quota support NOTE:Ext4 quota is now managed via e2fsprogs, changes which add prjquota suppport for e2fsprogs will be submitted as separate patch-set. Patch against next-20120605-1-g20a6ee4 Actually vfs part is really small, and most changes happen in fs/ext4/ Changes agains V9 1) Change the name of the id from "project_id" to "subtree" accordings to Dave's comments. 2) Fixes according to Jan's comments - coalapse first and second patch - get rid-of didicated mount point for subtree_id support - code style changes 3) Drop XFS stuff, since it require nontrivial changes in disk structures. Changes against V7 - Small fix for subtree 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 <dmonakhov@openvz.org> --- Makefile | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-)