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Message-ID: <20070604214226.1546.28051.stgit@localhost.localdomain>
Date: Mon, 04 Jun 2007 14:42:26 -0700
From: PJ Waskiewicz <peter.p.waskiewicz.jr@...el.com>
To: shemminger@...ux-foundation.org
Cc: netdev@...r.kernel.org, jeff@...zik.org, auke-jan.h.kok@...el.com
Subject: [PATCH] iproute2: Added support for RR qdisc (sch_rr)
Add tc support for the sch_rr qdisc. This qdisc supports multiple queues
on hardware. The syntax for sch_rr is the same as sch_prio.
Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@...el.com>
---
include/linux/pkt_sched.h | 11 ++++
tc/Makefile | 1
tc/q_rr.c | 113 +++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 125 insertions(+), 0 deletions(-)
diff --git a/include/linux/pkt_sched.h b/include/linux/pkt_sched.h
index d10f353..907412b 100644
--- a/include/linux/pkt_sched.h
+++ b/include/linux/pkt_sched.h
@@ -22,6 +22,7 @@
#define TC_PRIO_CONTROL 7
#define TC_PRIO_MAX 15
+#define TC_RR_MAX 15
/* Generic queue statistics, available for all the elements.
Particular schedulers may have also their private records.
@@ -90,6 +91,16 @@ struct tc_fifo_qopt
__u32 limit; /* Queue length: bytes for bfifo, packets for pfifo */
};
+/* RR section */
+#define TCQ_RR_BANDS 16
+#define TCQ_MIN_RR_BANDS 2
+
+struct tc_rr_qopt
+{
+ int bands;
+ __u8 priomap[TC_RR_MAX + 1];
+};
+
/* PRIO section */
#define TCQ_PRIO_BANDS 16
diff --git a/tc/Makefile b/tc/Makefile
index 9d618ff..62e2697 100644
--- a/tc/Makefile
+++ b/tc/Makefile
@@ -9,6 +9,7 @@ TCMODULES += q_fifo.o
TCMODULES += q_sfq.o
TCMODULES += q_red.o
TCMODULES += q_prio.o
+TCMODULES += q_rr.o
TCMODULES += q_tbf.o
TCMODULES += q_cbq.o
TCMODULES += f_rsvp.o
diff --git a/tc/q_rr.c b/tc/q_rr.c
new file mode 100644
index 0000000..8eecac9
--- /dev/null
+++ b/tc/q_rr.c
@@ -0,0 +1,113 @@
+/*
+ * q_rr.c RR.
+ *
+ * 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.
+ *
+ * Authors: PJ Waskiewicz, <peter.p.waskiewicz.jr@...el.com>
+ * Original Authors: Alexey Kuznetsov, <kuznet@....inr.ac.ru> (from PRIO)
+ *
+ * Changes:
+ *
+ * Ole Husgaard <sparre@...in.dknet.dk>: 990513: prio2band map was always reset.
+ * J Hadi Salim <hadi@...erus.ca>: 990609: priomap fix.
+ */
+
+#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: ... rr bands NUMBER priomap P1 P2...\n");
+}
+
+#define usage() return(-1)
+
+static int rr_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n)
+{
+ int ok = 0;
+ int pmap_mode = 0;
+ int idx = 0;
+ struct tc_rr_qopt opt={3,{ 1, 2, 2, 2, 1, 2, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1 }};
+
+ while (argc > 0) {
+ if (strcmp(*argv, "bands") == 0) {
+ if (pmap_mode)
+ explain();
+ NEXT_ARG();
+ if (get_integer(&opt.bands, *argv, 10)) {
+ fprintf(stderr, "Illegal \"bands\"\n");
+ return -1;
+ }
+ ok++;
+ } else if (strcmp(*argv, "priomap") == 0) {
+ if (pmap_mode) {
+ fprintf(stderr, "Error: duplicate priomap\n");
+ return -1;
+ }
+ pmap_mode = 1;
+ } else if (strcmp(*argv, "help") == 0) {
+ explain();
+ return -1;
+ } else {
+ unsigned band;
+ if (!pmap_mode) {
+ fprintf(stderr, "What is \"%s\"?\n", *argv);
+ explain();
+ return -1;
+ }
+ if (get_unsigned(&band, *argv, 10)) {
+ fprintf(stderr, "Illegal \"priomap\" element\n");
+ return -1;
+ }
+ if (band > opt.bands) {
+ fprintf(stderr, "\"priomap\" element is out of bands\n");
+ return -1;
+ }
+ if (idx > TC_RR_MAX) {
+ fprintf(stderr, "\"priomap\" index > TC_RR_MAX=%u\n", TC_RR_MAX);
+ return -1;
+ }
+ opt.priomap[idx++] = band;
+ }
+ argc--; argv++;
+ }
+
+ addattr_l(n, 1024, TCA_OPTIONS, &opt, sizeof(opt));
+ return 0;
+}
+
+int rr_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
+{
+ int i;
+ struct tc_rr_qopt *qopt;
+
+ if (opt == NULL)
+ return 0;
+
+ if (RTA_PAYLOAD(opt) < sizeof(*qopt))
+ return -1;
+ qopt = RTA_DATA(opt);
+ fprintf(f, "bands %u priomap ", qopt->bands);
+ for (i=0; i <= TC_RR_MAX; i++)
+ fprintf(f, " %d", qopt->priomap[i]);
+ return 0;
+}
+
+struct qdisc_util rr_qdisc_util = {
+ .id = "rr",
+ .parse_qopt = rr_parse_opt,
+ .print_qopt = rr_print_opt,
+};
-
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