Merge tag 'block-6.18-20251031' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux

Pull block fixes from Jens Axboe:

 - Fix blk-crypto reporting EIO when EINVAL is the correct error code

 - Two bug fixes for the block zone support

 - NVME pull request via Keith:
      - Target side authentication fixup
      - Peer-to-peer metadata fixup

 - null_blk DMA alignment fix

* tag 'block-6.18-20251031' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux:
  null_blk: set dma alignment to logical block size
  blk-crypto: use BLK_STS_INVAL for alignment errors
  block: make REQ_OP_ZONE_OPEN a write operation
  block: fix op_is_zone_mgmt() to handle REQ_OP_ZONE_RESET_ALL
  nvme-pci: use blk_map_iter for p2p metadata
  nvmet-auth: update sc_c in host response

3 files changed, 14 insertions, 5 deletions

diff --git a/drivers/block/null_blk/main.c b/drivers/block/null_blk/main.c
index f982027e8c85..0ee55f889cfd 100644
--- a/drivers/block/null_blk/main.c
+++ b/drivers/block/null_blk/main.c
@@ -1949,6 +1949,7 @@ static int null_add_dev(struct nullb_device *dev)
 		.logical_block_size	= dev->blocksize,
 		.physical_block_size	= dev->blocksize,
 		.max_hw_sectors		= dev->max_sectors,
+		.dma_alignment		= dev->blocksize - 1,
 	};
 
 	struct nullb *nullb;
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index c916176bd9f0..72fb675a696f 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -1042,7 +1042,7 @@ static blk_status_t nvme_map_data(struct request *req)
 	return nvme_pci_setup_data_prp(req, &iter);
 }
 
-static blk_status_t nvme_pci_setup_meta_sgls(struct request *req)
+static blk_status_t nvme_pci_setup_meta_iter(struct request *req)
 {
 	struct nvme_queue *nvmeq = req->mq_hctx->driver_data;
 	unsigned int entries = req->nr_integrity_segments;
@@ -1072,8 +1072,12 @@ static blk_status_t nvme_pci_setup_meta_sgls(struct request *req)
 	 * descriptor provides an explicit length, so we're relying on that
 	 * mechanism to catch any misunderstandings between the application and
 	 * device.
+	 *
+	 * P2P DMA also needs to use the blk_dma_iter method, so mptr setup
+	 * leverages this routine when that happens.
 	 */
-	if (entries == 1 && !(nvme_req(req)->flags & NVME_REQ_USERCMD)) {
+	if (!nvme_ctrl_meta_sgl_supported(&dev->ctrl) ||
+	    (entries == 1 && !(nvme_req(req)->flags & NVME_REQ_USERCMD))) {
 		iod->cmd.common.metadata = cpu_to_le64(iter.addr);
 		iod->meta_total_len = iter.len;
 		iod->meta_dma = iter.addr;
@@ -1114,6 +1118,9 @@ static blk_status_t nvme_pci_setup_meta_mptr(struct request *req)
 	struct nvme_queue *nvmeq = req->mq_hctx->driver_data;
 	struct bio_vec bv = rq_integrity_vec(req);
 
+	if (is_pci_p2pdma_page(bv.bv_page))
+		return nvme_pci_setup_meta_iter(req);
+
 	iod->meta_dma = dma_map_bvec(nvmeq->dev->dev, &bv, rq_dma_dir(req), 0);
 	if (dma_mapping_error(nvmeq->dev->dev, iod->meta_dma))
 		return BLK_STS_IOERR;
@@ -1128,7 +1135,7 @@ static blk_status_t nvme_map_metadata(struct request *req)
 
 	if ((iod->cmd.common.flags & NVME_CMD_SGL_METABUF) &&
 	    nvme_pci_metadata_use_sgls(req))
-		return nvme_pci_setup_meta_sgls(req);
+		return nvme_pci_setup_meta_iter(req);
 	return nvme_pci_setup_meta_mptr(req);
 }
 
diff --git a/drivers/nvme/target/auth.c b/drivers/nvme/target/auth.c
index b340380f3892..ceba21684e82 100644
--- a/drivers/nvme/target/auth.c
+++ b/drivers/nvme/target/auth.c
@@ -298,7 +298,7 @@ int nvmet_auth_host_hash(struct nvmet_req *req, u8 *response,
 	const char *hash_name;
 	u8 *challenge = req->sq->dhchap_c1;
 	struct nvme_dhchap_key *transformed_key;
-	u8 buf[4];
+	u8 buf[4], sc_c = ctrl->concat ? 1 : 0;
 	int ret;
 
 	hash_name = nvme_auth_hmac_name(ctrl->shash_id);
@@ -367,13 +367,14 @@ int nvmet_auth_host_hash(struct nvmet_req *req, u8 *response,
 	ret = crypto_shash_update(shash, buf, 2);
 	if (ret)
 		goto out;
-	memset(buf, 0, 4);
+	*buf = sc_c;
 	ret = crypto_shash_update(shash, buf, 1);
 	if (ret)
 		goto out;
 	ret = crypto_shash_update(shash, "HostHost", 8);
 	if (ret)
 		goto out;
+	memset(buf, 0, 4);
 	ret = crypto_shash_update(shash, ctrl->hostnqn, strlen(ctrl->hostnqn));
 	if (ret)
 		goto out;