nvme-tcp: Add TOS for tcp transport (bb13985d) · Commits · 戴 / test

TOS provide clients the ability to segregate traffic flows for different type of data. One of the TOS usage is bandwidth management which allows setting bandwidth limits for QoS classes, e.g. 80% bandwidth to controllers at QoS class A and 20% to controllers at QoS class B. usage examples: nvme connect --tos=0 --transport=tcp --traddr=10.0.1.1 --nqn=test-nvme Signed-off-by:

Israel Rukshin <israelr@mellanox.com> Reviewed-by:

Max Gurtovoy <maxg@mellanox.com> Signed-off-by:

Sagi Grimberg <sagi@grimberg.me>

drivers/nvme/host/tcp.c

+14 −1

Original line number	Diff line number	Diff line
		@@ -1304,6 +1304,18 @@ static int nvme_tcp_alloc_queue(struct nvme_ctrl *nctrl,
		goto err_sock;
		}

		/* Set socket type of service */
		if (nctrl->opts->tos >= 0) {
		opt = nctrl->opts->tos;
		ret = kernel_setsockopt(queue->sock, SOL_IP, IP_TOS,
		(char *)&opt, sizeof(opt));
		if (ret) {
		dev_err(nctrl->device,
		"failed to set IP_TOS sock opt %d\n", ret);
		goto err_sock;
		}
		}

		queue->sock->sk->sk_allocation = GFP_ATOMIC;
		if (!qid)
		n = 0;
		@@ -2344,7 +2356,8 @@ static struct nvmf_transport_ops nvme_tcp_transport = {
		.allowed_opts = NVMF_OPT_TRSVCID \| NVMF_OPT_RECONNECT_DELAY \|
		NVMF_OPT_HOST_TRADDR \| NVMF_OPT_CTRL_LOSS_TMO \|
		NVMF_OPT_HDR_DIGEST \| NVMF_OPT_DATA_DIGEST \|
		NVMF_OPT_NR_WRITE_QUEUES \| NVMF_OPT_NR_POLL_QUEUES,
		NVMF_OPT_NR_WRITE_QUEUES \| NVMF_OPT_NR_POLL_QUEUES \|
		NVMF_OPT_TOS,
		.create_ctrl = nvme_tcp_create_ctrl,
		};

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