vfs: Add general support to enforce project quota limits

This patch adds support for a new quota type PRJQUOTA for project quota
enforcement. Also a new method get_projid() is added into dquot_operations
structure.

Signed-off-by: Li Xi <lixi@ddn.com>
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jan Kara <jack@suse.cz>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/quota.h b/include/linux/quota.h
index cf910d1f8efa..b2505acfd3c0 100644
--- a/include/linux/quota.h
+++ b/include/linux/quota.h
@@ -50,6 +50,7 @@
 
 #undef USRQUOTA
 #undef GRPQUOTA
+#undef PRJQUOTA
 enum quota_type {
         USRQUOTA = 0,           /* element used for user quotas */
         GRPQUOTA = 1,           /* element used for group quotas */
@@ -319,6 +320,7 @@ struct dquot_operations {
         /* get reserved quota for delayed alloc, value returned is managed by
          * quota code only */
         qsize_t *(*get_reserved_space) (struct inode *);
+        int (*get_projid) (struct inode *, kprojid_t *);/* Get project ID */
 };
 
 struct path;