1 files changed, 98 insertions, 9 deletions

diff --git a/drivers/md/md-bitmap.h b/drivers/md/md-bitmap.h
index 59e9dd45cfde..b42a28fa83a0 100644
--- a/drivers/md/md-bitmap.h
+++ b/drivers/md/md-bitmap.h
@@ -9,10 +9,26 @@
 
 #define BITMAP_MAGIC 0x6d746962
 
+/*
+ * 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
+
 /* 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-	BITMAP_STALE	   = 1,  /* the bitmap file is out of date or had -EIO */
+	BITMAP_STALE	   = 1, /* the bitmap file is out of date or had -EIO */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,
 };
 
@@ -61,11 +77,15 @@ struct md_bitmap_stats {
 	struct file	*file;
 };
 
+typedef void (md_bitmap_fn)(struct mddev *mddev, sector_t offset,
+			    unsigned long sectors);
+
 struct bitmap_operations {
-	bool (*enabled)(struct mddev *mddev);
+	struct md_submodule_head head;
+
+	bool (*enabled)(void *data, bool flush);
 	int (*create)(struct mddev *mddev);
-	int (*resize)(struct mddev *mddev, sector_t blocks, int chunksize,
-		      bool init);
+	int (*resize)(struct mddev *mddev, sector_t blocks, int chunksize);
 
 	int (*load)(struct mddev *mddev);
 	void (*destroy)(struct mddev *mddev);
@@ -80,10 +100,13 @@ struct bitmap_operations {
 	void (*end_behind_write)(struct mddev *mddev);
 	void (*wait_behind_writes)(struct mddev *mddev);
 
-	void (*start_write)(struct mddev *mddev, sector_t offset,
-			    unsigned long sectors);
-	void (*end_write)(struct mddev *mddev, sector_t offset,
-			  unsigned long sectors);
+	md_bitmap_fn *start_write;
+	md_bitmap_fn *end_write;
+	md_bitmap_fn *start_discard;
+	md_bitmap_fn *end_discard;
+
+	sector_t (*skip_sync_blocks)(struct mddev *mddev, sector_t offset);
+	bool (*blocks_synced)(struct mddev *mddev, sector_t offset);
 	bool (*start_sync)(struct mddev *mddev, sector_t offset,
 			   sector_t *blocks, bool degraded);
 	void (*end_sync)(struct mddev *mddev, sector_t offset, sector_t *blocks);
@@ -101,9 +124,75 @@ struct bitmap_operations {
 			      sector_t *hi, bool clear_bits);
 	void (*set_pages)(void *data, unsigned long pages);
 	void (*free)(void *data);
+
+	struct attribute_group *group;
 };
 
 /* the bitmap API */
-void mddev_set_bitmap_ops(struct mddev *mddev);
+static inline bool md_bitmap_registered(struct mddev *mddev)
+{
+	return mddev->bitmap_ops != NULL;
+}
+
+static inline bool md_bitmap_enabled(struct mddev *mddev, bool flush)
+{
+	/* bitmap_ops must be registered before creating bitmap. */
+	if (!md_bitmap_registered(mddev))
+		return false;
+
+	if (!mddev->bitmap)
+		return false;
+
+	return mddev->bitmap_ops->enabled(mddev->bitmap, flush);
+}
+
+static inline bool md_bitmap_start_sync(struct mddev *mddev, sector_t offset,
+					sector_t *blocks, bool degraded)
+{
+	/* always resync if no bitmap */
+	if (!md_bitmap_enabled(mddev, false)) {
+		*blocks = 1024;
+		return true;
+	}
+
+	return mddev->bitmap_ops->start_sync(mddev, offset, blocks, degraded);
+}
+
+static inline void md_bitmap_end_sync(struct mddev *mddev, sector_t offset,
+				      sector_t *blocks)
+{
+	if (!md_bitmap_enabled(mddev, false)) {
+		*blocks = 1024;
+		return;
+	}
+
+	mddev->bitmap_ops->end_sync(mddev, offset, blocks);
+}
+
+#ifdef CONFIG_MD_BITMAP
+int md_bitmap_init(void);
+void md_bitmap_exit(void);
+#else
+static inline int md_bitmap_init(void)
+{
+	return 0;
+}
+static inline void md_bitmap_exit(void)
+{
+}
+#endif
+
+#ifdef CONFIG_MD_LLBITMAP
+int md_llbitmap_init(void);
+void md_llbitmap_exit(void);
+#else
+static inline int md_llbitmap_init(void)
+{
+	return 0;
+}
+static inline void md_llbitmap_exit(void)
+{
+}
+#endif
 
 #endif