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Date: Tue, 12 Apr 2011 08:57:27 -0700
From: John Fastabend <john.r.fastabend@...el.com>
To: shemminger@...tta.com
Cc: netdev@...r.kernel.org, bhutchings@...arflare.com
Subject: [PATCH] iproute2: tc add mqprio qdisc support
Add mqprio qdisc support. Output matches the following,
# ./tc/tc qdisc
qdisc mq 0: dev eth1 root
qdisc mq 0: dev eth2 root
qdisc mqprio 8001: dev eth3 root tc 8 map 0 1 2 3 4 5 6 7 1 1 1 1 1 1 1 1
queues:(0:7) (8:15) (16:23) (24:31) (32:39) (40:47) (48:55) (56:63)
And usage is,
# ./tc/tc qdisc add dev eth3 root mqprio help
Usage: ... mclass [num_tc NUMBER] [map P0 P1...]
[offset txq0 txq1 ...] [count cnt0 cnt1 ...] [hw 1|0]
Signed-off-by: John Fastabend <john.r.fastabend@...el.com>
---
include/linux/pkt_sched.h | 12 ++++
tc/Makefile | 1
tc/q_mqprio.c | 125 +++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 138 insertions(+), 0 deletions(-)
create mode 100644 tc/q_mqprio.c
diff --git a/include/linux/pkt_sched.h b/include/linux/pkt_sched.h
index 2cfa4bc..776cd93 100644
--- a/include/linux/pkt_sched.h
+++ b/include/linux/pkt_sched.h
@@ -481,4 +481,16 @@ struct tc_drr_stats {
__u32 deficit;
};
+/* MQPRIO */
+#define TC_QOPT_BITMASK 15
+#define TC_QOPT_MAX_QUEUE 16
+
+struct tc_mqprio_qopt {
+ __u8 num_tc;
+ __u8 prio_tc_map[TC_QOPT_BITMASK + 1];
+ __u8 hw;
+ __u16 count[TC_QOPT_MAX_QUEUE];
+ __u16 offset[TC_QOPT_MAX_QUEUE];
+};
+
#endif
diff --git a/tc/Makefile b/tc/Makefile
index 101cc83..df372c6 100644
--- a/tc/Makefile
+++ b/tc/Makefile
@@ -43,6 +43,7 @@ TCMODULES += em_nbyte.o
TCMODULES += em_cmp.o
TCMODULES += em_u32.o
TCMODULES += em_meta.o
+TCMODULES += q_mqprio.o
TCSO :=
ifeq ($(TC_CONFIG_ATM),y)
diff --git a/tc/q_mqprio.c b/tc/q_mqprio.c
new file mode 100644
index 0000000..8b2c006
--- /dev/null
+++ b/tc/q_mqprio.c
@@ -0,0 +1,125 @@
+/*
+ * q_mqprio.c MQ prio qdisc
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Author: John Fastabend, <john.r.fastabend@...el.com>
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <syslog.h>
+#include <fcntl.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <string.h>
+
+#include "utils.h"
+#include "tc_util.h"
+
+static void explain(void)
+{
+ fprintf(stderr, "Usage: ... mqprio [num_tc NUMBER] [map P0 P1 ...]\n");
+ fprintf(stderr, " [offset txq0 txq1 ...] ");
+ fprintf(stderr, "[count cnt0,cnt1 ...] [hw 1|0]\n");
+}
+
+static int mqprio_parse_opt(struct qdisc_util *qu, int argc,
+ char **argv, struct nlmsghdr *n)
+{
+ int idx;
+ struct tc_mqprio_qopt opt = {
+ 8,
+ {0, 1, 2, 3, 4, 5, 6, 7, 0, 1, 1, 1, 3, 3, 3, 3},
+ 1,
+ };
+
+ while (argc > 0) {
+ idx = 0;
+ if (strcmp(*argv, "num_tc") == 0) {
+ NEXT_ARG();
+ if (get_u8(&opt.num_tc, *argv, 10)) {
+ fprintf(stderr, "Illegal \"num_tc\"\n");
+ return -1;
+ }
+ } else if (strcmp(*argv, "map") == 0) {
+ while (idx < TC_QOPT_MAX_QUEUE && NEXT_ARG_OK()) {
+ NEXT_ARG();
+ if (get_u8(&opt.prio_tc_map[idx], *argv, 10)) {
+ PREV_ARG();
+ break;
+ }
+ idx++;
+ }
+ for ( ; idx < TC_QOPT_MAX_QUEUE; idx++)
+ opt.prio_tc_map[idx] = 0;
+ } else if (strcmp(*argv, "offset") == 0) {
+ while (idx < TC_QOPT_MAX_QUEUE && NEXT_ARG_OK()) {
+ NEXT_ARG();
+ if (get_u16(&opt.offset[idx], *argv, 10)) {
+ PREV_ARG();
+ break;
+ }
+ idx++;
+ }
+ } else if (strcmp(*argv, "count") == 0) {
+ while (idx < TC_QOPT_MAX_QUEUE && NEXT_ARG_OK()) {
+ NEXT_ARG();
+ if (get_u16(&opt.count[idx], *argv, 10)) {
+ PREV_ARG();
+ break;
+ }
+ idx++;
+ }
+ } else if (strcmp(*argv, "hw") == 0) {
+ NEXT_ARG();
+ if (get_u8(&opt.hw, *argv, 10)) {
+ fprintf(stderr, "Illegal \"hw\"\n");
+ return -1;
+ }
+ idx++;
+ } else if (strcmp(*argv, "help") == 0) {
+ explain();
+ return -1;
+ } else {
+ fprintf(stderr, "Unknown argument\n");
+ return -1;
+ }
+ argc--; argv++;
+ }
+
+ addattr_l(n, 1024, TCA_OPTIONS, &opt, sizeof(opt));
+ return 0;
+}
+
+int mqprio_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
+{
+ int i;
+ struct tc_mqprio_qopt *qopt;
+
+ if (opt == NULL)
+ return 0;
+
+ qopt = RTA_DATA(opt);
+
+ fprintf(f, " tc %u map ", qopt->num_tc);
+ for (i = 0; i <= TC_PRIO_MAX; i++)
+ fprintf(f, "%d ", qopt->prio_tc_map[i]);
+ fprintf(f, "\n queues:");
+ for (i = 0; i < qopt->num_tc; i++)
+ fprintf(f, "(%i:%i) ", qopt->offset[i],
+ qopt->offset[i] + qopt->count[i] - 1);
+ return 0;
+}
+
+struct qdisc_util mqprio_qdisc_util = {
+ .id = "mqprio",
+ .parse_qopt = mqprio_parse_opt,
+ .print_qopt = mqprio_print_opt,
+};
+
--
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