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nvme: add support for passing on the application tag

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With user integrity buffer, there is a way to specify the app_tag.
Set the corresponding protocol specific flags and send the app_tag down.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Anuj Gupta <anuj20.g@samsung.com>
Signed-off-by: Kanchan Joshi <joshi.k@samsung.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Link: https://lore.kernel.org/r/20241128112240.8867-9-anuj20.g@samsung.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Kanchan Joshi 2024-11-28 16:52:38 +05:30 committed by Jens Axboe
parent 2c0487d8b1
commit 472292cd8c
1 changed files with 10 additions and 0 deletions
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10
drivers/nvme/host/core.c
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@ -885,6 +885,12 @@ static blk_status_t nvme_setup_discard(struct nvme_ns *ns, struct request *req,
return BLK_STS_OK;
}
static void nvme_set_app_tag(struct request *req, struct nvme_command *cmnd)
{
cmnd->rw.lbat = cpu_to_le16(bio_integrity(req->bio)->app_tag);
cmnd->rw.lbatm = cpu_to_le16(0xffff);
}
static void nvme_set_ref_tag(struct nvme_ns *ns, struct nvme_command *cmnd,
struct request *req)
{
@ -1025,6 +1031,10 @@ static inline blk_status_t nvme_setup_rw(struct nvme_ns *ns,
control |= NVME_RW_APPEND_PIREMAP;
nvme_set_ref_tag(ns, cmnd, req);
}
if (bio_integrity_flagged(req->bio, BIP_CHECK_APPTAG)) {
control |= NVME_RW_PRINFO_PRCHK_APP;
nvme_set_app_tag(req, cmnd);
}
}
cmnd->rw.control = cpu_to_le16(control);