linux-kernel - [PATCH 12/23] md/md-bitmap: add macros for lockless bitmap

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20250524061320.370630-13-yukuai1@huaweicloud.com>
Date: Sat, 24 May 2025 14:13:09 +0800
From: Yu Kuai <yukuai1@...weicloud.com>
To: hch@....de,
	xni@...hat.com,
	colyli@...nel.org,
	song@...nel.org,
	yukuai3@...wei.com
Cc: linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-raid@...r.kernel.org,
	yukuai1@...weicloud.com,
	yi.zhang@...wei.com,
	yangerkun@...wei.com,
	johnny.chenyi@...wei.com
Subject: [PATCH 12/23] md/md-bitmap: add macros for lockless bitmap

From: Yu Kuai <yukuai3@...wei.com>

Also move other values to md-bitmap.h and update comments.

Signed-off-by: Yu Kuai <yukuai3@...wei.com>
---
 drivers/md/md-bitmap.c |  9 ---------
 drivers/md/md-bitmap.h | 17 +++++++++++++++++
 2 files changed, 17 insertions(+), 9 deletions(-)

diff --git a/drivers/md/md-bitmap.c b/drivers/md/md-bitmap.c
index 17d41a7b30ce..689d5dba9328 100644
--- a/drivers/md/md-bitmap.c
+++ b/drivers/md/md-bitmap.c
@@ -36,15 +36,6 @@
 #include "md-bitmap.h"
 #include "md-cluster.h"
 
-#define BITMAP_MAJOR_LO 3
-/* version 4 insists the bitmap is in little-endian order
- * with version 3, it is host-endian which is non-portable
- * Version 5 is currently set only for clustered devices
- */
-#define BITMAP_MAJOR_HI 4
-#define BITMAP_MAJOR_CLUSTERED 5
-#define	BITMAP_MAJOR_HOSTENDIAN 3
-
 /*
  * in-memory bitmap:
  *
diff --git a/drivers/md/md-bitmap.h b/drivers/md/md-bitmap.h
index f2d79c8a23b7..d2cdf831ef1a 100644
--- a/drivers/md/md-bitmap.h
+++ b/drivers/md/md-bitmap.h
@@ -18,10 +18,27 @@ typedef __u16 bitmap_counter_t;
 #define RESYNC_MASK ((bitmap_counter_t) (1 << (COUNTER_BITS - 2)))
 #define COUNTER_MAX ((bitmap_counter_t) RESYNC_MASK - 1)
 
+/*
+ * version 3 is host-endian order, this is deprecated and not used for new
+ * array
+ */
+#define BITMAP_MAJOR_LO		3
+#define BITMAP_MAJOR_HOSTENDIAN	3
+/* version 4 is little-endian order, the default value */
+#define BITMAP_MAJOR_HI		4
+/* version 5 is only used for cluster */
+#define BITMAP_MAJOR_CLUSTERED	5
+/* version 6 is only used for lockless bitmap */
+#define BITMAP_MAJOR_LOCKLESS	6
+
+#define BITMAP_SB_SIZE 1024
 /* use these for bitmap->flags and bitmap->sb->state bit-fields */
 enum bitmap_state {
 	BITMAP_STALE	   = 1,  /* the bitmap file is out of date or had -EIO */
 	BITMAP_WRITE_ERROR = 2, /* A write error has occurred */
+	BITMAP_FIRST_USE   = 3, /* llbitmap is just created */
+	BITMAP_CLEAN       = 4, /* llbitmap is created with assume_clean */
+	BITMAP_DAEMON_BUSY = 5, /* llbitmap daemon is not finished after daemon_sleep */
 	BITMAP_HOSTENDIAN  =15,
 };
 
-- 
2.39.2