diff --git a/include/linux/dqblk_v1.h b/include/linux/dqblk_v1.h
index 42fbf4797156..57f1250d5a52 100644
--- a/include/linux/dqblk_v1.h
+++ b/include/linux/dqblk_v1.h
@@ -11,6 +11,12 @@
 /* Root squash turned on */
 #define V1_DQF_RSQUASH 1
 
+/* Numbers of blocks needed for updates */
+#define V1_INIT_ALLOC 1
+#define V1_INIT_REWRITE 1
+#define V1_DEL_ALLOC 0
+#define V1_DEL_REWRITE 2
+
 /* Special information about quotafile */
 struct v1_mem_dqinfo {
 };
diff --git a/include/linux/dqblk_v2.h b/include/linux/dqblk_v2.h
index 4a6c5f6867bb..4f853322cb7f 100644
--- a/include/linux/dqblk_v2.h
+++ b/include/linux/dqblk_v2.h
@@ -10,6 +10,12 @@
 /* id numbers of quota format */
 #define QFMT_VFS_V0 2
 
+/* Numbers of blocks needed for updates */
+#define V2_INIT_ALLOC 4
+#define V2_INIT_REWRITE 2
+#define V2_DEL_ALLOC 0
+#define V2_DEL_REWRITE 6
+
 /* Inmemory copy of version specific information */
 struct v2_mem_dqinfo {
 	unsigned int dqi_blocks;
diff --git a/include/linux/quota.h b/include/linux/quota.h
index ac5b90f4f256..700ead45084f 100644
--- a/include/linux/quota.h
+++ b/include/linux/quota.h
@@ -138,8 +138,11 @@ struct if_dqinfo {
 #include <linux/dqblk_v2.h>
 
 /* Maximal numbers of writes for quota operation (insert/delete/update)
- * (over all formats) - info block, 4 pointer blocks, data block */
-#define DQUOT_MAX_WRITES	6
+ * (over VFS all formats) */
+#define DQUOT_INIT_ALLOC max(V1_INIT_ALLOC, V2_INIT_ALLOC)
+#define DQUOT_INIT_REWRITE max(V1_INIT_REWRITE, V2_INIT_REWRITE)
+#define DQUOT_DEL_ALLOC max(V1_DEL_ALLOC, V2_DEL_ALLOC)
+#define DQUOT_DEL_REWRITE max(V1_DEL_REWRITE, V2_DEL_REWRITE)
 
 /*
  * Data for one user/group kept in memory