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nvme-tcp: Set SO_PRIORITY for all host sockets

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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: Kiran Patil <kiran.patil@intel.com>
Signed-off-by: Mark Wunderlich <mark.wunderlich@intel.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Keith Busch <kbusch@kernel.org>
This commit is contained in:
Wunderlich, Mark 2020-01-16 00:46:12 +00:00 committed by Keith Busch
parent d3a9b0cadf
commit 9912ade355
1 changed files with 21 additions and 0 deletions
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21
drivers/nvme/host/tcp.c
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@ -20,6 +20,16 @@
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 {
NVME_TCP_SEND_CMD_PDU = 0,
NVME_TCP_SEND_H2C_PDU,
@ -1309,6 +1319,17 @@ static int nvme_tcp_alloc_queue(struct nvme_ctrl *nctrl,
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 */
if (nctrl->opts->tos >= 0) {
opt = nctrl->opts->tos;