netdev - Re: [patch iproute2] iplink: add support for num[tr]xqueues

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Date:	Fri, 20 Jul 2012 08:52:18 -0700
From:	Stephen Hemminger <stephen.hemminger@...tta.com>
To:	Jiri Pirko <jiri@...nulli.us>
Cc:	netdev@...r.kernel.org, David Miller <davem@...emloft.net>,
	edumazet@...gle.com, shemminger@...tta.com
Subject: Re: [patch iproute2] iplink: add support for num[tr]xqueues

I like the option, but  numtxqueue is too verbose for the syntax model
of iproute. Why not use txq and rxq?

Sent from my ASUS Pad

Jiri Pirko <jiri@...nulli.us> wrote:

>Signed-off-by: Jiri Pirko <jiri@...nulli.us>
>---
> include/linux/if_link.h |    2 ++
> ip/iplink.c             |   20 ++++++++++++++++++++
> man/man8/ip-link.8.in   |   13 +++++++++++++
> 3 files changed, 35 insertions(+)
>
>diff --git a/include/linux/if_link.h b/include/linux/if_link.h
>index 00e5868..46f03db 100644
>--- a/include/linux/if_link.h
>+++ b/include/linux/if_link.h
>@@ -140,6 +140,8 @@ enum {
> 	IFLA_EXT_MASK,		/* Extended info mask, VFs, etc */
> 	IFLA_PROMISCUITY,	/* Promiscuity count: > 0 means acts PROMISC */
> #define IFLA_PROMISCUITY IFLA_PROMISCUITY
>+	IFLA_NUM_TX_QUEUES,
>+	IFLA_NUM_RX_QUEUES,
> 	__IFLA_MAX
> };
> 
>diff --git a/ip/iplink.c b/ip/iplink.c
>index 679091e..0baa128 100644
>--- a/ip/iplink.c
>+++ b/ip/iplink.c
>@@ -48,6 +48,8 @@ void iplink_usage(void)
> 		fprintf(stderr, "                   [ address LLADDR ]\n");
> 		fprintf(stderr, "                   [ broadcast LLADDR ]\n");
> 		fprintf(stderr, "                   [ mtu MTU ]\n");
>+		fprintf(stderr, "                   [ numtxqueues QUEUE_COUNT ]\n");
>+		fprintf(stderr, "                   [ numrxqueues QUEUE_COUNT ]\n");
> 		fprintf(stderr, "                   type TYPE [ ARGS ]\n");
> 		fprintf(stderr, "       ip link delete DEV type TYPE [ ARGS ]\n");
> 		fprintf(stderr, "\n");
>@@ -279,6 +281,8 @@ int iplink_parse(int argc, char **argv, struct iplink_req *req,
> 	int mtu = -1;
> 	int netns = -1;
> 	int vf = -1;
>+	int numtxqueues = -1;
>+	int numrxqueues = -1;
> 
> 	*group = -1;
> 	ret = argc;
>@@ -445,6 +449,22 @@ int iplink_parse(int argc, char **argv, struct iplink_req *req,
> 				invarg("Invalid operstate\n", *argv);
> 
> 			addattr8(&req->n, sizeof(*req), IFLA_OPERSTATE, state);
>+		} else if (strcmp(*argv, "numtxqueues") == 0) {
>+			NEXT_ARG();
>+			if (numtxqueues != -1)
>+				duparg("numtxqueues", *argv);
>+			if (get_integer(&numtxqueues, *argv, 0))
>+				invarg("Invalid \"numtxqueues\" value\n", *argv);
>+			addattr_l(&req->n, sizeof(*req), IFLA_NUM_TX_QUEUES,
>+				  &numtxqueues, 4);
>+		} else if (strcmp(*argv, "numrxqueues") == 0) {
>+			NEXT_ARG();
>+			if (numrxqueues != -1)
>+				duparg("numrxqueues", *argv);
>+			if (get_integer(&numrxqueues, *argv, 0))
>+				invarg("Invalid \"numrxqueues\" value\n", *argv);
>+			addattr_l(&req->n, sizeof(*req), IFLA_NUM_RX_QUEUES,
>+				  &numrxqueues, 4);
> 		} else {
> 			if (strcmp(*argv, "dev") == 0) {
> 				NEXT_ARG();
>diff --git a/man/man8/ip-link.8.in b/man/man8/ip-link.8.in
>index 9386cc6..8a24e51 100644
>--- a/man/man8/ip-link.8.in
>+++ b/man/man8/ip-link.8.in
>@@ -40,6 +40,11 @@ ip-link \- network device configuration
> .RB "[ " mtu
> .IR MTU " ]"
> .br
>+.RB "[ " numtxqueues
>+.IR QUEUE_COUNT " ]"
>+.RB "[ " numrxqueues
>+.IR QUEUE_COUNT " ]"
>+.br
> .BR type " TYPE"
> .RI "[ " ARGS " ]"
> 
>@@ -156,6 +161,14 @@ Link types:
> - Ethernet Bridge device
> .in -8
> 
>+.TP
>+.BI numtxqueues " QUEUE_COUNT "
>+specifies the number of transmit queues for new device.
>+
>+.TP
>+.BI numrxqueues " QUEUE_COUNT "
>+specifies the number of receive queues for new device.
>+
> .SS ip link delete - delete virtual link
> .I DEVICE
> specifies the virtual  device to act operate on.
>-- 
>1.7.10.4
>