From: Nicholas Bellinger <[email protected]> This patch adds support for nvme/loop block integrity, based upon the reported ID_NS.ms + ID_NS.dps feature bits in nvmet_execute_identify_ns().
Cc: Jens Axboe <[email protected]> Cc: Christoph Hellwig <[email protected]> Cc: Martin Petersen <[email protected]> Cc: Sagi Grimberg <[email protected]> Cc: Hannes Reinecke <[email protected]> Cc: Mike Christie <[email protected]> Signed-off-by: Nicholas Bellinger <[email protected]> --- drivers/nvme/target/loop.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/drivers/nvme/target/loop.c b/drivers/nvme/target/loop.c index 08b4fbb..b4b4da9 100644 --- a/drivers/nvme/target/loop.c +++ b/drivers/nvme/target/loop.c @@ -42,6 +42,7 @@ struct nvme_loop_iod { struct nvme_loop_queue *queue; struct work_struct work; struct sg_table sg_table; + struct scatterlist meta_sg; struct scatterlist first_sgl[]; }; @@ -193,6 +194,24 @@ static int nvme_loop_queue_rq(struct blk_mq_hw_ctx *hctx, BUG_ON(iod->req.sg_cnt > req->nr_phys_segments); } + if (blk_integrity_rq(req)) { + int count; + + if (blk_rq_count_integrity_sg(hctx->queue, req->bio) != 1) + BUG_ON(1); + + sg_init_table(&iod->meta_sg, 1); + count = blk_rq_map_integrity_sg(hctx->queue, req->bio, + &iod->meta_sg); + + iod->req.prot_sg = &iod->meta_sg; + iod->req.prot_sg_cnt = 1; +#if 0 + printk("nvme/loop: Set prot_sg %p and prot_sg_cnt: %d\n", + iod->req.prot_sg, iod->req.prot_sg_cnt); +#endif + } + iod->cmd.common.command_id = req->tag; blk_mq_start_request(req); -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
