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nvmet: set WZDS and DRB if device enables unmap write zeroes operation

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Set the WZDS and DRB bits to the namespace dlfeat if the underlying
block device enables the unmap write zeroes operation, make the nvme
target device supports the unmap write zeroes command.

Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
Link: https://lore.kernel.org/20250619111806.3546162-4-yi.zhang@huaweicloud.com
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: "Martin K. Petersen" <martin.petersen@oracle.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Zhang Yi
2025-06-19 19:18:00 +08:00
committed by Christian Brauner
parent 545fb46e5b
commit 50634366de
1 changed files with 4 additions and 0 deletions
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4
drivers/nvme/target/io-cmd-bdev.c
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@@ -46,6 +46,10 @@ void nvmet_bdev_set_limits(struct block_device *bdev, struct nvme_id_ns *id)
id->npda = id->npdg;
/* NOWS = Namespace Optimal Write Size */
id->nows = to0based(bdev_io_opt(bdev) / bdev_logical_block_size(bdev));
/* Set WZDS and DRB if device supports unmapped write zeroes */
if (bdev_write_zeroes_unmap_sectors(bdev))
id->dlfeat = (1 << 3) | 0x1;
}
void nvmet_bdev_ns_disable(struct nvmet_ns *ns)