From 4e5117ba0af4582b6ec9164874f719d7f3f1eb2b Mon Sep 17 00:00:00 2001
From: Jan Kara <jack@suse.cz>
Date: Thu, 23 Jun 2005 22:01:03 -0700
Subject: [PATCH] [PATCH] quota: improve credits estimates
Improve estimates on the number of needed credits for quota transaction.
Now we distinguish blocks that might need to be allocated and blocks that
only need to be rewritten. Also we distinguish deleting of a quota
structure and creating of a new one.
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
include/linux/dqblk_v1.h | 6 ++++++
include/linux/dqblk_v2.h | 6 ++++++
include/linux/quota.h | 7 +++++--
3 files changed, 17 insertions(+), 2 deletions(-)
diff --git a/include/linux/dqblk_v1.h b/include/linux/dqblk_v1.h
index 42fbf47971568..57f1250d5a526 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 4a6c5f6867bb0..4f853322cb7fa 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 ac5b90f4f2564..700ead45084fd 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
--
GitLab