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, 4 insertions, 2 deletions

diff --git a/include/uapi/linux/quota.h b/include/uapi/linux/quota.h
index 1f49b8341c99..9c95b2c1c88a 100644
--- a/include/uapi/linux/quota.h
+++ b/include/uapi/linux/quota.h
@@ -36,11 +36,12 @@
 #include <linux/errno.h>
 #include <linux/types.h>
 
-#define __DQUOT_VERSION__       "dquot_6.5.2"
+#define __DQUOT_VERSION__       "dquot_6.6.0"
 
-#define MAXQUOTAS 2
+#define MAXQUOTAS 3
 #define USRQUOTA  0             /* element used for user quotas */
 #define GRPQUOTA  1             /* element used for group quotas */
+#define PRJQUOTA  2             /* element used for project quotas */
 
 /*
  * Definitions for the default names of the quotas files.
@@ -48,6 +49,7 @@
 #define INITQFNAMES { \
         "user",    /* USRQUOTA */ \
         "group",   /* GRPQUOTA */ \
+        "project", /* PRJQUOTA */ \
         "undefined", \
 };