quota: Add quota reservation claim and released operations

Reserved quota will be claimed at the block allocation time. Over-booked
quota could be returned back with the release callback function.

Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: Jan Kara <jack@suse.cz>

1 files changed, 6 insertions, 0 deletions

diff --git a/include/linux/quota.h b/include/linux/quota.h
index 54b837fa64f2..a510d91561f4 100644
--- a/include/linux/quota.h
+++ b/include/linux/quota.h
@@ -311,6 +311,12 @@ struct dquot_operations {
         int (*write_info) (struct super_block *, int);  /* Write of quota "superblock" */
         /* reserve quota for delayed block allocation */
         int (*reserve_space) (struct inode *, qsize_t, int);
+        /* claim reserved quota for delayed alloc */
+        int (*claim_space) (struct inode *, qsize_t);
+        /* release rsved quota for delayed alloc */
+        void (*release_rsv) (struct inode *, qsize_t);
+        /* get reserved quota for delayed alloc */
+        qsize_t (*get_reserved_space) (struct inode *);
 };
 
 /* Operations handling requests from userspace */