Merge tag 'nvme-6.18-2025-10-16' of git://git.infradead.org/nvme into block-6.18

Pull NVMe fixes from Keith:

"- iostats accounting fixed on multipath retries (Amit)
 - secure concatenation response fixup (Martin)
 - tls partial record fixup (Wilfred)"

* tag 'nvme-6.18-2025-10-16' of git://git.infradead.org/nvme:
  nvme/tcp: handle tls partially sent records in write_space()
  nvme-auth: update sc_c in host response
  nvme-multipath: Skip nr_active increments in RETRY disposition

Author: axboe

drivers/nvme/host/auth.c

@@ -36,6 +36,7 @@ struct nvme_dhchap_queue_context {
 	u8 status;
 	u8 dhgroup_id;
 	u8 hash_id;
+	u8 sc_c;
 	size_t hash_len;
 	u8 c1[64];
 	u8 c2[64];
@@ -154,6 +155,8 @@ static int nvme_auth_set_dhchap_negotiate_data(struct nvme_ctrl *ctrl,
 	data->auth_protocol[0].dhchap.idlist[34] = NVME_AUTH_DHGROUP_6144;
 	data->auth_protocol[0].dhchap.idlist[35] = NVME_AUTH_DHGROUP_8192;
 
+	chap->sc_c = data->sc_c;
+
 	return size;
 }
 
@@ -489,7 +492,7 @@ static int nvme_auth_dhchap_setup_host_response(struct nvme_ctrl *ctrl,
 	ret = crypto_shash_update(shash, buf, 2);
 	if (ret)
 		goto out;
-	memset(buf, 0, sizeof(buf));
+	*buf = chap->sc_c;
 	ret = crypto_shash_update(shash, buf, 1);
 	if (ret)
 		goto out;
@@ -500,6 +503,7 @@ static int nvme_auth_dhchap_setup_host_response(struct nvme_ctrl *ctrl,
 				  strlen(ctrl->opts->host->nqn));
 	if (ret)
 		goto out;
+	memset(buf, 0, sizeof(buf));
 	ret = crypto_shash_update(shash, buf, 1);
 	if (ret)
 		goto out;

drivers/nvme/host/multipath.c

@@ -182,12 +182,14 @@ void nvme_mpath_start_request(struct request *rq)
 	struct nvme_ns *ns = rq->q->queuedata;
 	struct gendisk *disk = ns->head->disk;
 
-	if (READ_ONCE(ns->head->subsys->iopolicy) == NVME_IOPOLICY_QD) {
+	if ((READ_ONCE(ns->head->subsys->iopolicy) == NVME_IOPOLICY_QD) &&
+	    !(nvme_req(rq)->flags & NVME_MPATH_CNT_ACTIVE)) {
 		atomic_inc(&ns->ctrl->nr_active);
 		nvme_req(rq)->flags |= NVME_MPATH_CNT_ACTIVE;
 	}
 
-	if (!blk_queue_io_stat(disk->queue) || blk_rq_is_passthrough(rq))
+	if (!blk_queue_io_stat(disk->queue) || blk_rq_is_passthrough(rq) ||
+	    (nvme_req(rq)->flags & NVME_MPATH_IO_STATS))
 		return;
 
 	nvme_req(rq)->flags |= NVME_MPATH_IO_STATS;

drivers/nvme/host/tcp.c

@@ -1081,6 +1081,9 @@ static void nvme_tcp_write_space(struct sock *sk)
 	queue = sk->sk_user_data;
 	if (likely(queue && sk_stream_is_writeable(sk))) {
 		clear_bit(SOCK_NOSPACE, &sk->sk_socket->flags);
+		/* Ensure pending TLS partial records are retried */
+		if (nvme_tcp_queue_tls(queue))
+			queue->write_space(sk);
 		queue_work_on(queue->io_cpu, nvme_tcp_wq, &queue->io_work);
 	}
 	read_unlock_bh(&sk->sk_callback_lock);