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Date: Fri, 7 Jan 2011 11:24:29 -0800
From: Stephen Hemminger <shemminger@...tta.com>
To: Stephen Hemminger <shemminger@...tta.com>
Cc: David Miller <davem@...emloft.net>,
Eric Dumazet <dada1@...mosbay.com>,
Fabio Checconi <fabio@...dalf.sssup.it>,
netdev@...r.kernel.org, Luigi Rizzo <rizzo@....unipi.it>
Subject: [RFC] sched: QFQ - quick fair queue scheduler (iproute2)
This is the iproute2 interface for QFQ. It is spartan at this point
and needs a man page.
---
include/linux/pkt_sched.h | 14 +++++
tc/Makefile | 1 +
tc/q_qfq.c | 123 +++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 138 insertions(+), 0 deletions(-)
create mode 100644 tc/q_qfq.c
diff --git a/include/linux/pkt_sched.h b/include/linux/pkt_sched.h
index 2cfa4bc..c3ca324 100644
--- a/include/linux/pkt_sched.h
+++ b/include/linux/pkt_sched.h
@@ -481,4 +481,18 @@ struct tc_drr_stats {
__u32 deficit;
};
+/* QFQ */
+enum {
+ TCA_QFQ_WEIGHT,
+ TCA_QFQ_LMAX,
+ __TCA_QFQ_MAX
+};
+
+#define TCA_QFQ_MAX (__TCA_QFQ_MAX - 1)
+
+struct tc_qfq_stats {
+ __u32 weight;
+ __u32 lmax;
+};
+
#endif
diff --git a/tc/Makefile b/tc/Makefile
index 101cc83..715b34e 100644
--- a/tc/Makefile
+++ b/tc/Makefile
@@ -29,6 +29,7 @@ TCMODULES += q_ingress.o
TCMODULES += q_hfsc.o
TCMODULES += q_htb.o
TCMODULES += q_drr.o
+TCMODULES += q_qfq.o
TCMODULES += m_gact.o
TCMODULES += m_mirred.o
TCMODULES += m_nat.o
diff --git a/tc/q_qfq.c b/tc/q_qfq.c
new file mode 100644
index 0000000..ad77f45
--- /dev/null
+++ b/tc/q_qfq.c
@@ -0,0 +1,123 @@
+/*
+ * q_qfq.c QFQ.
+ *
+ * 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: Stephen Hemminger <shemminger@...tta.com>
+ * Fabio Checconi <fabio@...dalf.sssup.it>
+ *
+ */
+#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: ... qfq\n");
+}
+
+static void explain1(const char *arg)
+{
+ fprintf(stderr, "Illegal \"%s\"\n", arg);
+}
+
+static void explain_class(void)
+{
+ fprintf(stderr, "Usage: ... qfq weight NUMBER maxpkt BYTES\n");
+}
+
+static int qfq_parse_opt(struct qdisc_util *qu, int argc, char **argv,
+ struct nlmsghdr *n)
+{
+ while (argc > 0) {
+ if (matches(*argv, "help") == 0) {
+ explain();
+ return -1;
+ } else {
+ fprintf(stderr, "What is \"%s\"?\n", *argv);
+ explain();
+ return -1;
+ }
+ argc--; argv++;
+ }
+
+ return 0;
+}
+
+static int qfq_parse_class_opt(struct qdisc_util *qu, int argc, char **argv,
+ struct nlmsghdr *n)
+{
+ struct rtattr *tail;
+ __u32 tmp;
+
+ tail = NLMSG_TAIL(n);
+ addattr_l(n, 4096, TCA_OPTIONS, NULL, 0);
+
+ while (argc > 0) {
+ if (matches(*argv, "weight") == 0) {
+ NEXT_ARG();
+ if (get_u32(&tmp, *argv, 10)) {
+ explain1("weight"); return -1;
+ }
+ addattr32(n, 4096, TCA_QFQ_WEIGHT, tmp);
+ } else if (matches(*argv, "maxpkt") == 0) {
+ NEXT_ARG();
+ if (get_u32(&tmp, *argv, 10)) {
+ explain1("maxpkt"); return -1;
+ }
+ addattr32(n, 4096, TCA_QFQ_LMAX, tmp);
+ } else if (strcmp(*argv, "help") == 0) {
+ explain_class();
+ return -1;
+ } else {
+ fprintf(stderr, "What is \"%s\"?\n", *argv);
+ explain_class();
+ return -1;
+ }
+ argc--; argv++;
+ }
+
+ tail->rta_len = (void *)NLMSG_TAIL(n) - (void *)tail;
+
+ return 0;
+}
+
+static int qfq_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
+{
+ struct rtattr *tb[TCA_QFQ_MAX + 1];
+
+ if (opt == NULL)
+ return 0;
+
+ parse_rtattr_nested(tb, TCA_QFQ_MAX, opt);
+
+ if (tb[TCA_QFQ_WEIGHT]) {
+ fprintf(f, "weight %u ",
+ *(__u32 *)RTA_DATA(tb[TCA_QFQ_WEIGHT]));
+ }
+
+ if (tb[TCA_QFQ_LMAX]) {
+ fprintf(f, "maxpkt %u ",
+ *(__u32 *)RTA_DATA(tb[TCA_QFQ_LMAX]));
+ }
+
+ return 0;
+}
+
+struct qdisc_util qfq_qdisc_util = {
+ .id = "qfq",
+ .parse_qopt = qfq_parse_opt,
+ .print_qopt = qfq_print_opt,
+ .parse_copt = qfq_parse_class_opt,
+ .print_copt = qfq_print_opt,
+};
+
--
1.7.1
--
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