From 1898efcdbed32bb1c67269c985a50bab0dbc9493 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Wed, 25 Oct 2023 16:10:18 +0200
Subject: [PATCH] block: update the stable_writes flag in bdev_add
Propagate the per-queue stable_write flags into each bdev inode in bdev_add.
This makes sure devices that require stable writes have it set for I/O
on the block device node as well.
Note that this doesn't cover the case of a flag changing on a live device
yet. We should handle that as well, but I plan to cover it as part of a
more general rework of how changing runtime paramters on block devices
works.
Fixes: 1cb039f3dc16 ("bdi: replace BDI_CAP_STABLE_WRITES with a queue and a sb flag")
Reported-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20231025141020.192413-3-hch@lst.de
Tested-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
---
block/bdev.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/block/bdev.c b/block/bdev.c
index e4cfb7adb6458..750aec178b6ab 100644
--- a/block/bdev.c
+++ b/block/bdev.c
@@ -425,6 +425,8 @@ void bdev_set_nr_sectors(struct block_device *bdev, sector_t sectors)
void bdev_add(struct block_device *bdev, dev_t dev)
{
+ if (bdev_stable_writes(bdev))
+ mapping_set_stable_writes(bdev->bd_inode->i_mapping);
bdev->bd_dev = dev;
bdev->bd_inode->i_rdev = dev;
bdev->bd_inode->i_ino = dev;
--
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