md/md-bitmap: replace md_bitmap_status() with a new helper md_bitmap_get_stats()

There are no functional changes, and the new helper will be used in
multiple places in following patches to avoid dereferencing bitmap
directly.

Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Link: https://lore.kernel.org/r/20240826074452.1490072-3-yukuai1@huaweicloud.com
Signed-off-by: Song Liu <song@kernel.org>

1 files changed, 7 insertions, 1 deletions

diff --git a/drivers/md/md-bitmap.h b/drivers/md/md-bitmap.h
index bb9eb418780a..b60418e3f573 100644
--- a/drivers/md/md-bitmap.h
+++ b/drivers/md/md-bitmap.h
@@ -234,6 +234,12 @@ struct bitmap {
 	int cluster_slot;		/* Slot offset for clustered env */
 };
 
+struct md_bitmap_stats {
+	unsigned long	missing_pages;
+	unsigned long	pages;
+	struct file	*file;
+};
+
 /* the bitmap API */
 
 /* these are used only by md/bitmap */
@@ -244,7 +250,7 @@ void md_bitmap_destroy(struct mddev *mddev);
 
 void md_bitmap_print_sb(struct bitmap *bitmap);
 void md_bitmap_update_sb(struct bitmap *bitmap);
-void md_bitmap_status(struct seq_file *seq, struct bitmap *bitmap);
+int md_bitmap_get_stats(struct bitmap *bitmap, struct md_bitmap_stats *stats);
 
 int  md_bitmap_setallbits(struct bitmap *bitmap);
 void md_bitmap_write_all(struct bitmap *bitmap);