From: Yu Kuai <yukuai3@xxxxxxxxxx>
The structure is empty for now, and will be used in later patches to
merge in bitmap operations, prepare to implement a new lock free
bitmap in the fulture.
Signed-off-by: Yu Kuai <yukuai3@xxxxxxxxxx>
---
drivers/md/md-bitmap.c | 8 ++++++++
drivers/md/md-bitmap.h | 4 ++++
drivers/md/md.c | 1 +
drivers/md/md.h | 1 +
4 files changed, 14 insertions(+)
diff --git a/drivers/md/md-bitmap.c b/drivers/md/md-bitmap.c
index 08232d8dc815..d9838fbcc9d7 100644
--- a/drivers/md/md-bitmap.c
+++ b/drivers/md/md-bitmap.c
@@ -2707,3 +2707,11 @@ const struct attribute_group md_bitmap_group = {
.name = "bitmap",
.attrs = md_bitmap_attrs,
};
+
+static struct bitmap_operations bitmap_ops = {
+};
+
+void mddev_set_bitmap_ops(struct mddev *mddev)
+{
+ mddev->bitmap_ops = &bitmap_ops;
+}
diff --git a/drivers/md/md-bitmap.h b/drivers/md/md-bitmap.h
index bb9eb418780a..992feaf66d47 100644
--- a/drivers/md/md-bitmap.h
+++ b/drivers/md/md-bitmap.h
@@ -234,7 +234,11 @@ struct bitmap {
int cluster_slot; /* Slot offset for clustered env */
};
+struct bitmap_operations {
+};
+
/* the bitmap API */
+void mddev_set_bitmap_ops(struct mddev *mddev);
/* these are used only by md/bitmap */
struct bitmap *md_bitmap_create(struct mddev *mddev, int slot);
diff --git a/drivers/md/md.c b/drivers/md/md.c
index d3a837506a36..f23138dd96a7 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -772,6 +772,7 @@ int mddev_init(struct mddev *mddev)
mddev->resync_min = 0;
mddev->resync_max = MaxSector;
mddev->level = LEVEL_NONE;
+ mddev_set_bitmap_ops(mddev);
INIT_WORK(&mddev->sync_work, md_start_sync);
INIT_WORK(&mddev->del_work, mddev_delayed_delete);
diff --git a/drivers/md/md.h b/drivers/md/md.h
index a0d6827dced9..e56193f71ab4 100644
--- a/drivers/md/md.h
+++ b/drivers/md/md.h
@@ -536,6 +536,7 @@ struct mddev {
int sync_checkers; /* # of threads checking writes_pending */
struct bitmap *bitmap; /* the bitmap for the device */
+ struct bitmap_operations *bitmap_ops;
struct {
struct file *file; /* the bitmap file */
loff_t offset; /* offset from superblock of
--
2.39.2
