Commit 9912ade3 authored by Wunderlich, Mark's avatar Wunderlich, Mark Committed by Keith Busch
Browse files

nvme-tcp: Set SO_PRIORITY for all host sockets 



Enable ability to associate all sockets related to NVMf TCP traffic
to a priority group that will perform optimized network processing for
this traffic class. Maintain initial default behavior of using priority
of zero.

Signed-off-by: default avatarKiran Patil <kiran.patil@intel.com>
Signed-off-by: default avatarMark Wunderlich <mark.wunderlich@intel.com>
Reviewed-by: default avatarSagi Grimberg <sagi@grimberg.me>
Signed-off-by: default avatarKeith Busch <kbusch@kernel.org>
parent d3a9b0ca

drivers/nvme/host/tcp.c

+21 −0
Original line number Original line Diff line number Diff line
@@ -20,6 +20,16 @@ 




struct nvme_tcp_queue;

struct nvme_tcp_queue;





/* Define the socket priority to use for connections were it is desirable

 * that the NIC consider performing optimized packet processing or filtering.

 * A non-zero value being sufficient to indicate general consideration of any

 * possible optimization.  Making it a module param allows for alternative

 * values that may be unique for some NIC implementations.

 */

static int so_priority;

module_param(so_priority, int, 0644);

MODULE_PARM_DESC(so_priority, "nvme tcp socket optimize priority");



enum nvme_tcp_send_state {

enum nvme_tcp_send_state {

	NVME_TCP_SEND_CMD_PDU = 0,

	NVME_TCP_SEND_CMD_PDU = 0,

	NVME_TCP_SEND_H2C_PDU,

	NVME_TCP_SEND_H2C_PDU,
@@ -1309,6 +1319,17 @@ static int nvme_tcp_alloc_queue(struct nvme_ctrl *nctrl, 
		goto err_sock;

		goto err_sock;

	}

	}





	if (so_priority > 0) {

		ret = kernel_setsockopt(queue->sock, SOL_SOCKET, SO_PRIORITY,

				(char *)&so_priority, sizeof(so_priority));

		if (ret) {

			dev_err(ctrl->ctrl.device,

				"failed to set SO_PRIORITY sock opt, ret %d\n",

				ret);

			goto err_sock;

		}

	}



	/* Set socket type of service */

	/* Set socket type of service */

	if (nctrl->opts->tos >= 0) {

	if (nctrl->opts->tos >= 0) {

		opt = nctrl->opts->tos;

		opt = nctrl->opts->tos;

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