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nvmet: report ns's vwc not present

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Currently, we report that controller has vwc even though the ns may
not have vwc. Report ns's vwc not present when not buffered_io or
backdev doesn't have vwc.

Signed-off-by: Guixin Liu <kanie@linux.alibaba.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
This commit is contained in:
Guixin Liu
2024-11-13 18:18:39 +08:00
committed by Keith Busch
parent 8a825d22a7
commit 609e60a3a9
1 changed files with 7 additions and 0 deletions
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7
drivers/nvme/target/admin-cmd.c
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@@ -934,6 +934,13 @@ static void nvmet_execute_id_cs_indep(struct nvmet_req *req)
id->nsattr |= NVME_NS_ATTR_RO;
if (req->ns->bdev && !bdev_nonrot(req->ns->bdev))
id->nsfeat |= NVME_NS_ROTATIONAL;
/*
* We need flush command to flush the file's metadata,
* so report supporting vwc if backend is file, even
* though buffered_io is disable.
*/
if (req->ns->bdev && !bdev_write_cache(req->ns->bdev))
id->nsfeat |= NVME_NS_VWC_NOT_PRESENT;
status = nvmet_copy_to_sgl(req, 0, id, sizeof(*id));
kfree(id);