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-rw-r--r--tc/q_pie.c252
1 files changed, 252 insertions, 0 deletions
diff --git a/tc/q_pie.c b/tc/q_pie.c
new file mode 100644
index 0000000..709a78b
--- /dev/null
+++ b/tc/q_pie.c
@@ -0,0 +1,252 @@
+/* Copyright (C) 2013 Cisco Systems, Inc, 2013.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * Author: Vijay Subramanian <vijaynsu@cisco.com>
+ * Author: Mythili Prabhu <mysuryan@cisco.com>
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <string.h>
+#include <math.h>
+
+#include "utils.h"
+#include "tc_util.h"
+
+static void explain(void)
+{
+ fprintf(stderr,
+ "Usage: ... pie [ limit PACKETS ] [ target TIME ]\n"
+ " [ tupdate TIME ] [ alpha ALPHA ] [ beta BETA ]\n"
+ " [ bytemode | nobytemode ] [ ecn | noecn ]\n"
+ " [ dq_rate_estimator | no_dq_rate_estimator ]\n");
+}
+
+#define ALPHA_MAX 32
+#define BETA_MAX 32
+
+static int pie_parse_opt(struct qdisc_util *qu, int argc, char **argv,
+ struct nlmsghdr *n, const char *dev)
+{
+ unsigned int limit = 0;
+ unsigned int target = 0;
+ unsigned int tupdate = 0;
+ unsigned int alpha = 0;
+ unsigned int beta = 0;
+ int ecn = -1;
+ int bytemode = -1;
+ int dq_rate_estimator = -1;
+ struct rtattr *tail;
+
+ while (argc > 0) {
+ if (strcmp(*argv, "limit") == 0) {
+ NEXT_ARG();
+ if (get_unsigned(&limit, *argv, 0)) {
+ fprintf(stderr, "Illegal \"limit\"\n");
+ return -1;
+ }
+ } else if (strcmp(*argv, "target") == 0) {
+ NEXT_ARG();
+ if (get_time(&target, *argv)) {
+ fprintf(stderr, "Illegal \"target\"\n");
+ return -1;
+ }
+ } else if (strcmp(*argv, "tupdate") == 0) {
+ NEXT_ARG();
+ if (get_time(&tupdate, *argv)) {
+ fprintf(stderr, "Illegal \"tupdate\"\n");
+ return -1;
+ }
+ } else if (strcmp(*argv, "alpha") == 0) {
+ NEXT_ARG();
+ if (get_unsigned(&alpha, *argv, 0) ||
+ (alpha > ALPHA_MAX)) {
+ fprintf(stderr, "Illegal \"alpha\"\n");
+ return -1;
+ }
+ } else if (strcmp(*argv, "beta") == 0) {
+ NEXT_ARG();
+ if (get_unsigned(&beta, *argv, 0) ||
+ (beta > BETA_MAX)) {
+ fprintf(stderr, "Illegal \"beta\"\n");
+ return -1;
+ }
+ } else if (strcmp(*argv, "ecn") == 0) {
+ ecn = 1;
+ } else if (strcmp(*argv, "noecn") == 0) {
+ ecn = 0;
+ } else if (strcmp(*argv, "bytemode") == 0) {
+ bytemode = 1;
+ } else if (strcmp(*argv, "nobytemode") == 0) {
+ bytemode = 0;
+ } else if (strcmp(*argv, "dq_rate_estimator") == 0) {
+ dq_rate_estimator = 1;
+ } else if (strcmp(*argv, "no_dq_rate_estimator") == 0) {
+ dq_rate_estimator = 0;
+ } else if (strcmp(*argv, "help") == 0) {
+ explain();
+ return -1;
+ } else {
+ fprintf(stderr, "What is \"%s\"?\n", *argv);
+ explain();
+ return -1;
+ }
+ argc--;
+ argv++;
+ }
+
+ tail = addattr_nest(n, 1024, TCA_OPTIONS);
+ if (limit)
+ addattr_l(n, 1024, TCA_PIE_LIMIT, &limit, sizeof(limit));
+ if (tupdate)
+ addattr_l(n, 1024, TCA_PIE_TUPDATE, &tupdate, sizeof(tupdate));
+ if (target)
+ addattr_l(n, 1024, TCA_PIE_TARGET, &target, sizeof(target));
+ if (alpha)
+ addattr_l(n, 1024, TCA_PIE_ALPHA, &alpha, sizeof(alpha));
+ if (beta)
+ addattr_l(n, 1024, TCA_PIE_BETA, &beta, sizeof(beta));
+ if (ecn != -1)
+ addattr_l(n, 1024, TCA_PIE_ECN, &ecn, sizeof(ecn));
+ if (bytemode != -1)
+ addattr_l(n, 1024, TCA_PIE_BYTEMODE, &bytemode,
+ sizeof(bytemode));
+ if (dq_rate_estimator != -1)
+ addattr_l(n, 1024, TCA_PIE_DQ_RATE_ESTIMATOR,
+ &dq_rate_estimator, sizeof(dq_rate_estimator));
+
+ addattr_nest_end(n, tail);
+ return 0;
+}
+
+static int pie_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
+{
+ struct rtattr *tb[TCA_PIE_MAX + 1];
+ unsigned int limit;
+ unsigned int tupdate;
+ unsigned int target;
+ unsigned int alpha;
+ unsigned int beta;
+ unsigned int ecn;
+ unsigned int bytemode;
+ unsigned int dq_rate_estimator;
+
+ SPRINT_BUF(b1);
+
+ if (opt == NULL)
+ return 0;
+
+ parse_rtattr_nested(tb, TCA_PIE_MAX, opt);
+
+ if (tb[TCA_PIE_LIMIT] &&
+ RTA_PAYLOAD(tb[TCA_PIE_LIMIT]) >= sizeof(__u32)) {
+ limit = rta_getattr_u32(tb[TCA_PIE_LIMIT]);
+ print_uint(PRINT_ANY, "limit", "limit %up ", limit);
+ }
+ if (tb[TCA_PIE_TARGET] &&
+ RTA_PAYLOAD(tb[TCA_PIE_TARGET]) >= sizeof(__u32)) {
+ target = rta_getattr_u32(tb[TCA_PIE_TARGET]);
+ print_uint(PRINT_JSON, "target", NULL, target);
+ print_string(PRINT_FP, NULL, "target %s ",
+ sprint_time(target, b1));
+ }
+ if (tb[TCA_PIE_TUPDATE] &&
+ RTA_PAYLOAD(tb[TCA_PIE_TUPDATE]) >= sizeof(__u32)) {
+ tupdate = rta_getattr_u32(tb[TCA_PIE_TUPDATE]);
+ print_uint(PRINT_JSON, "tupdate", NULL, tupdate);
+ print_string(PRINT_FP, NULL, "tupdate %s ",
+ sprint_time(tupdate, b1));
+ }
+ if (tb[TCA_PIE_ALPHA] &&
+ RTA_PAYLOAD(tb[TCA_PIE_ALPHA]) >= sizeof(__u32)) {
+ alpha = rta_getattr_u32(tb[TCA_PIE_ALPHA]);
+ print_uint(PRINT_ANY, "alpha", "alpha %u ", alpha);
+ }
+ if (tb[TCA_PIE_BETA] &&
+ RTA_PAYLOAD(tb[TCA_PIE_BETA]) >= sizeof(__u32)) {
+ beta = rta_getattr_u32(tb[TCA_PIE_BETA]);
+ print_uint(PRINT_ANY, "beta", "beta %u ", beta);
+ }
+
+ if (tb[TCA_PIE_ECN] && RTA_PAYLOAD(tb[TCA_PIE_ECN]) >= sizeof(__u32)) {
+ ecn = rta_getattr_u32(tb[TCA_PIE_ECN]);
+ if (ecn)
+ print_bool(PRINT_ANY, "ecn", "ecn ", true);
+ }
+
+ if (tb[TCA_PIE_BYTEMODE] &&
+ RTA_PAYLOAD(tb[TCA_PIE_BYTEMODE]) >= sizeof(__u32)) {
+ bytemode = rta_getattr_u32(tb[TCA_PIE_BYTEMODE]);
+ if (bytemode)
+ print_bool(PRINT_ANY, "bytemode", "bytemode ", true);
+ }
+
+ if (tb[TCA_PIE_DQ_RATE_ESTIMATOR] &&
+ RTA_PAYLOAD(tb[TCA_PIE_DQ_RATE_ESTIMATOR]) >= sizeof(__u32)) {
+ dq_rate_estimator =
+ rta_getattr_u32(tb[TCA_PIE_DQ_RATE_ESTIMATOR]);
+ if (dq_rate_estimator)
+ print_bool(PRINT_ANY, "dq_rate_estimator",
+ "dq_rate_estimator ", true);
+ }
+
+ return 0;
+}
+
+static int pie_print_xstats(struct qdisc_util *qu, FILE *f,
+ struct rtattr *xstats)
+{
+ struct tc_pie_xstats *st;
+
+ SPRINT_BUF(b1);
+
+ if (xstats == NULL)
+ return 0;
+
+ if (RTA_PAYLOAD(xstats) < sizeof(*st))
+ return -1;
+
+ st = RTA_DATA(xstats);
+
+ /* prob is returned as a fracion of maximum integer value */
+ print_float(PRINT_ANY, "prob", " prob %lg",
+ (double)st->prob / (double)UINT64_MAX);
+ print_uint(PRINT_JSON, "delay", NULL, st->delay);
+ print_string(PRINT_FP, NULL, " delay %s", sprint_time(st->delay, b1));
+
+ if (st->dq_rate_estimating)
+ print_uint(PRINT_ANY, "avg_dq_rate", " avg_dq_rate %u",
+ st->avg_dq_rate);
+
+ print_nl();
+ print_uint(PRINT_ANY, "pkts_in", " pkts_in %u", st->packets_in);
+ print_uint(PRINT_ANY, "overlimit", " overlimit %u", st->overlimit);
+ print_uint(PRINT_ANY, "dropped", " dropped %u", st->dropped);
+ print_uint(PRINT_ANY, "maxq", " maxq %u", st->maxq);
+ print_uint(PRINT_ANY, "ecn_mark", " ecn_mark %u", st->ecn_mark);
+
+ return 0;
+
+}
+
+struct qdisc_util pie_qdisc_util = {
+ .id = "pie",
+ .parse_qopt = pie_parse_opt,
+ .print_qopt = pie_print_opt,
+ .print_xstats = pie_print_xstats,
+};
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