linux-kernel - [PATCH RFC md-6.16 v3 01/19] md/md-bitmap: add {start, end}_discard in bitmap

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Message-Id: <20250512011927.2809400-2-yukuai1@huaweicloud.com>
Date: Mon, 12 May 2025 09:19:09 +0800
From: Yu Kuai <yukuai1@...weicloud.com>
To: hch@....de,
	xni@...hat.com,
	colyli@...nel.org,
	agk@...hat.com,
	snitzer@...nel.org,
	mpatocka@...hat.com,
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	yukuai3@...wei.com
Cc: linux-kernel@...r.kernel.org,
	dm-devel@...ts.linux.dev,
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Subject: [PATCH RFC md-6.16 v3 01/19] md/md-bitmap: add {start, end}_discard in bitmap_operations

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

Prepare to support discard in new md bitmap.

Signed-off-by: Yu Kuai <yukuai3@...wei.com>
---
 drivers/md/md-bitmap.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/md/md-bitmap.h b/drivers/md/md-bitmap.h
index d3d50629af91..c3fc051c88e9 100644
--- a/drivers/md/md-bitmap.h
+++ b/drivers/md/md-bitmap.h
@@ -94,6 +94,11 @@ struct bitmap_operations {
 			  unsigned long sectors);
 	void (*endwrite)(struct mddev *mddev, sector_t offset,
 			 unsigned long sectors);
+	int (*start_discard)(struct mddev *mddev, sector_t offset,
+			     unsigned long sectors);
+	void (*end_discard)(struct mddev *mddev, sector_t offset,
+			    unsigned long sectors);
+
 	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);
-- 
2.39.2