linux-kernel - [PATCH AUTOSEL 6.1] nvmet: propagate npwg topology

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Message-Id: <20250106164210.1122348-1-sashal@kernel.org>
Date: Mon,  6 Jan 2025 11:42:10 -0500
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Luis Chamberlain <mcgrof@...nel.org>,
	Sagi Grimberg <sagi@...mberg.me>,
	Keith Busch <kbusch@...nel.org>,
	Sasha Levin <sashal@...nel.org>,
	kch@...dia.com,
	linux-nvme@...ts.infradead.org
Subject: [PATCH AUTOSEL 6.1] nvmet: propagate npwg topology

From: Luis Chamberlain <mcgrof@...nel.org>

[ Upstream commit b579d6fdc3a9149bb4d2b3133cc0767130ed13e6 ]

Ensure we propagate npwg to the target as well instead
of assuming its the same logical blocks per physical block.

This ensures devices with large IUs information properly
propagated on the target.

Signed-off-by: Luis Chamberlain <mcgrof@...nel.org>
Reviewed-by: Sagi Grimberg <sagi@...mberg.me>
Signed-off-by: Keith Busch <kbusch@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/nvme/target/io-cmd-bdev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/nvme/target/io-cmd-bdev.c b/drivers/nvme/target/io-cmd-bdev.c
index c2d6cea0236b..ada58a4d0d0c 100644
--- a/drivers/nvme/target/io-cmd-bdev.c
+++ b/drivers/nvme/target/io-cmd-bdev.c
@@ -36,7 +36,7 @@ void nvmet_bdev_set_limits(struct block_device *bdev, struct nvme_id_ns *id)
 	 */
 	id->nsfeat |= 1 << 4;
 	/* NPWG = Namespace Preferred Write Granularity. 0's based */
-	id->npwg = lpp0b;
+	id->npwg = to0based(bdev_io_min(bdev) / bdev_logical_block_size(bdev));
 	/* NPWA = Namespace Preferred Write Alignment. 0's based */
 	id->npwa = id->npwg;
 	/* NPDG = Namespace Preferred Deallocate Granularity. 0's based */
-- 
2.39.5