@@ -1209,6 +1209,11 @@ static inline void xfs_dinode_put_rdev(struct xfs_dinode *dip, xfs_dev_t rdev)
* been reached, and therefore no expiration has been set. Therefore, the
* ondisk min and max defined here can be used directly to constrain the incore
* quota expiration timestamps on a Unix system.
+ *
+ * The grace period for each quota type is stored in the root dquot (id = 0)
+ * and is applied to a non-root dquot when it exceeds the soft or hard limits.
+ * The length of quota grace periods are unsigned 32-bit quantities measured in
+ * units of seconds. A value of zero means to use the default period.
*/
/*
@@ -1223,6 +1228,14 @@ static inline void xfs_dinode_put_rdev(struct xfs_dinode *dip, xfs_dev_t rdev)
*/
#define XFS_DQ_LEGACY_EXPIRY_MAX ((int64_t)U32_MAX)
+/*
+ * Default quota grace periods, ranging from zero (use the compiled defaults)
+ * to ~136 years. These are applied to a non-root dquot that has exceeded
+ * either limit.
+ */
+#define XFS_DQ_GRACE_MIN ((int64_t)0)
+#define XFS_DQ_GRACE_MAX ((int64_t)U32_MAX)
+
/*
* This is the main portion of the on-disk representation of quota information
* for a user. We pad this with some more expansion room to construct the on