Adding upstream version 6.1.0.upstream/6.1.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 506 insertions, 0 deletions

diff --git a/tc/q_gred.c b/tc/q_gred.c
new file mode 100644
index 0000000..01f12ee
--- /dev/null
+++ b/tc/q_gred.c
@@ -0,0 +1,506 @@
+/*
+ * q_gred.c		GRED.
+ *
+ *		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:    J Hadi Salim(hadi@nortelnetworks.com)
+ *             code ruthlessly ripped from
+ *	       Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
+ *
+ */
+
+#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"
+
+#include "tc_red.h"
+
+#ifdef DEBUG
+#define DPRINTF(format, args...) fprintf(stderr, format, ##args)
+#else
+#define DPRINTF(format, args...)
+#endif
+
+static void explain(void)
+{
+	fprintf(stderr,
+		"Usage: tc qdisc { add | replace | change } ... gred setup vqs NUMBER\n"
+		"           default DEFAULT_VQ [ grio ] [ limit BYTES ] [ecn] [harddrop]\n"
+		"       tc qdisc change ... gred vq VQ [ prio VALUE ] limit BYTES\n"
+		"           min BYTES max BYTES avpkt BYTES [ burst PACKETS ]\n"
+		"           [ probability PROBABILITY ] [ bandwidth KBPS ] [ecn] [harddrop]\n");
+}
+
+static int init_gred(struct qdisc_util *qu, int argc, char **argv,
+		     struct nlmsghdr *n)
+{
+
+	struct rtattr *tail;
+	struct tc_gred_sopt opt = { 0 };
+	__u32 limit = 0;
+
+	opt.def_DP = MAX_DPs;
+
+	while (argc > 0) {
+		DPRINTF(stderr, "init_gred: invoked with %s\n", *argv);
+		if (strcmp(*argv, "vqs") == 0 ||
+		    strcmp(*argv, "DPs") == 0) {
+			NEXT_ARG();
+			if (get_unsigned(&opt.DPs, *argv, 10)) {
+				fprintf(stderr, "Illegal \"vqs\"\n");
+				return -1;
+			} else if (opt.DPs > MAX_DPs) {
+				fprintf(stderr, "GRED: only %u VQs are currently supported\n",
+					MAX_DPs);
+				return -1;
+			}
+		} else if (strcmp(*argv, "default") == 0) {
+			if (opt.DPs == 0) {
+				fprintf(stderr, "\"default\" must be defined after \"vqs\"\n");
+				return -1;
+			}
+			NEXT_ARG();
+			if (get_unsigned(&opt.def_DP, *argv, 10)) {
+				fprintf(stderr, "Illegal \"default\"\n");
+				return -1;
+			} else if (opt.def_DP >= opt.DPs) {
+				fprintf(stderr, "\"default\" must be less than \"vqs\"\n");
+				return -1;
+			}
+		} else if (strcmp(*argv, "grio") == 0) {
+			opt.grio = 1;
+		} else if (strcmp(*argv, "limit") == 0) {
+			NEXT_ARG();
+			if (get_size(&limit, *argv)) {
+				fprintf(stderr, "Illegal \"limit\"\n");
+				return -1;
+			}
+		} else if (strcmp(*argv, "ecn") == 0) {
+			opt.flags |= TC_RED_ECN;
+		} else if (strcmp(*argv, "harddrop") == 0) {
+			opt.flags |= TC_RED_HARDDROP;
+		} else if (strcmp(*argv, "help") == 0) {
+			explain();
+			return -1;
+		} else {
+			fprintf(stderr, "What is \"%s\"?\n", *argv);
+			explain();
+			return -1;
+		}
+		argc--; argv++;
+	}
+
+	if (!opt.DPs || opt.def_DP == MAX_DPs) {
+		fprintf(stderr, "Illegal gred setup parameters\n");
+		return -1;
+	}
+
+	DPRINTF("TC_GRED: sending DPs=%u def_DP=%u\n", opt.DPs, opt.def_DP);
+	n->nlmsg_flags |= NLM_F_CREATE;
+	tail = addattr_nest(n, 1024, TCA_OPTIONS);
+	addattr_l(n, 1024, TCA_GRED_DPS, &opt, sizeof(struct tc_gred_sopt));
+	if (limit)
+		addattr32(n, 1024, TCA_GRED_LIMIT, limit);
+	addattr_nest_end(n, tail);
+	return 0;
+}
+/*
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+*/
+static int gred_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n, const char *dev)
+{
+	struct rtattr *tail, *entry, *vqs;
+	int ok = 0;
+	struct tc_gred_qopt opt = { 0 };
+	unsigned int burst = 0;
+	unsigned int avpkt = 0;
+	unsigned int flags = 0;
+	double probability = 0.02;
+	unsigned int rate = 0;
+	int parm;
+	__u8 sbuf[256];
+	__u32 max_P;
+
+	opt.DP = MAX_DPs;
+
+	while (argc > 0) {
+		if (strcmp(*argv, "limit") == 0) {
+			NEXT_ARG();
+			if (get_size(&opt.limit, *argv)) {
+				fprintf(stderr, "Illegal \"limit\"\n");
+				return -1;
+			}
+			ok++;
+		} else if (strcmp(*argv, "setup") == 0) {
+			if (ok) {
+				fprintf(stderr, "Illegal \"setup\"\n");
+				return -1;
+			}
+			return init_gred(qu, argc-1, argv+1, n);
+		} else if (strcmp(*argv, "min") == 0) {
+			NEXT_ARG();
+			if (get_size(&opt.qth_min, *argv)) {
+				fprintf(stderr, "Illegal \"min\"\n");
+				return -1;
+			}
+			ok++;
+		} else if (strcmp(*argv, "max") == 0) {
+			NEXT_ARG();
+			if (get_size(&opt.qth_max, *argv)) {
+				fprintf(stderr, "Illegal \"max\"\n");
+				return -1;
+			}
+			ok++;
+		} else if (strcmp(*argv, "vq") == 0 ||
+			   strcmp(*argv, "DP") == 0) {
+			NEXT_ARG();
+			if (get_unsigned(&opt.DP, *argv, 10)) {
+				fprintf(stderr, "Illegal \"vq\"\n");
+				return -1;
+			} else if (opt.DP >= MAX_DPs) {
+				fprintf(stderr, "GRED: only %u VQs are currently supported\n",
+					MAX_DPs);
+				return -1;
+			} /* need a better error check */
+			ok++;
+		} else if (strcmp(*argv, "burst") == 0) {
+			NEXT_ARG();
+			if (get_unsigned(&burst, *argv, 0)) {
+				fprintf(stderr, "Illegal \"burst\"\n");
+				return -1;
+			}
+			ok++;
+		} else if (strcmp(*argv, "avpkt") == 0) {
+			NEXT_ARG();
+			if (get_size(&avpkt, *argv)) {
+				fprintf(stderr, "Illegal \"avpkt\"\n");
+				return -1;
+			}
+			ok++;
+		} else if (strcmp(*argv, "probability") == 0) {
+			NEXT_ARG();
+			if (sscanf(*argv, "%lg", &probability) != 1) {
+				fprintf(stderr, "Illegal \"probability\"\n");
+				return -1;
+			}
+			ok++;
+		} else if (strcmp(*argv, "prio") == 0) {
+			NEXT_ARG();
+			opt.prio = strtol(*argv, (char **)NULL, 10);
+			/* some error check here */
+			ok++;
+		} else if (strcmp(*argv, "bandwidth") == 0) {
+			NEXT_ARG();
+			if (strchr(*argv, '%')) {
+				if (get_percent_rate(&rate, *argv, dev)) {
+					fprintf(stderr, "Illegal \"bandwidth\"\n");
+					return -1;
+				}
+			} else if (get_rate(&rate, *argv)) {
+				fprintf(stderr, "Illegal \"bandwidth\"\n");
+				return -1;
+			}
+			ok++;
+		} else if (strcmp(*argv, "ecn") == 0) {
+			flags |= TC_RED_ECN;
+		} else if (strcmp(*argv, "harddrop") == 0) {
+			flags |= TC_RED_HARDDROP;
+		} else if (strcmp(*argv, "help") == 0) {
+			explain();
+			return -1;
+		} else {
+			fprintf(stderr, "What is \"%s\"?\n", *argv);
+			explain();
+			return -1;
+		}
+		argc--; argv++;
+	}
+
+	if (!ok) {
+		explain();
+		return -1;
+	}
+	if (opt.DP == MAX_DPs || !opt.limit || !opt.qth_min || !opt.qth_max ||
+	    !avpkt) {
+		fprintf(stderr, "Required parameter (vq, limit, min, max, avpkt) is missing\n");
+		return -1;
+	}
+	if (!burst) {
+		burst = (2 * opt.qth_min + opt.qth_max) / (3 * avpkt);
+		fprintf(stderr, "GRED: set burst to %u\n", burst);
+	}
+	if (!rate) {
+		get_rate(&rate, "10Mbit");
+		fprintf(stderr, "GRED: set bandwidth to 10Mbit\n");
+	}
+	if ((parm = tc_red_eval_ewma(opt.qth_min, burst, avpkt)) < 0) {
+		fprintf(stderr, "GRED: failed to calculate EWMA constant.\n");
+		return -1;
+	}
+	if (parm >= 10)
+		fprintf(stderr, "GRED: WARNING. Burst %u seems to be too large.\n",
+		    burst);
+	opt.Wlog = parm;
+	if ((parm = tc_red_eval_P(opt.qth_min, opt.qth_max, probability)) < 0) {
+		fprintf(stderr, "GRED: failed to calculate probability.\n");
+		return -1;
+	}
+	opt.Plog = parm;
+	if ((parm = tc_red_eval_idle_damping(opt.Wlog, avpkt, rate, sbuf)) < 0)
+	    {
+		fprintf(stderr, "GRED: failed to calculate idle damping table.\n");
+		return -1;
+	}
+	opt.Scell_log = parm;
+
+	tail = addattr_nest(n, 1024, TCA_OPTIONS);
+	addattr_l(n, 1024, TCA_GRED_PARMS, &opt, sizeof(opt));
+	addattr_l(n, 1024, TCA_GRED_STAB, sbuf, 256);
+	max_P = probability * pow(2, 32);
+	addattr32(n, 1024, TCA_GRED_MAX_P, max_P);
+
+	vqs = addattr_nest(n, 1024, TCA_GRED_VQ_LIST);
+	entry = addattr_nest(n, 1024, TCA_GRED_VQ_ENTRY);
+	addattr32(n, 1024, TCA_GRED_VQ_DP, opt.DP);
+	addattr32(n, 1024, TCA_GRED_VQ_FLAGS, flags);
+	addattr_nest_end(n, entry);
+	addattr_nest_end(n, vqs);
+
+	addattr_nest_end(n, tail);
+	return 0;
+}
+
+struct tc_gred_info {
+	bool	flags_present;
+	__u64	bytes;
+	__u32	packets;
+	__u32	backlog;
+	__u32	prob_drop;
+	__u32	prob_mark;
+	__u32	forced_drop;
+	__u32	forced_mark;
+	__u32	pdrop;
+	__u32	other;
+	__u32	flags;
+};
+
+static void
+gred_parse_vqs(struct tc_gred_info *info, struct rtattr *vqs)
+{
+	int rem = RTA_PAYLOAD(vqs);
+	unsigned int offset = 0;
+
+	while (rem > offset) {
+		struct rtattr *tb_entry[TCA_GRED_VQ_ENTRY_MAX + 1] = {};
+		struct rtattr *tb[TCA_GRED_VQ_MAX + 1] = {};
+		struct rtattr *entry;
+		unsigned int len;
+		unsigned int dp;
+
+		entry = RTA_DATA(vqs) + offset;
+
+		parse_rtattr(tb_entry, TCA_GRED_VQ_ENTRY_MAX, entry,
+			     rem - offset);
+		len = RTA_LENGTH(RTA_PAYLOAD(entry));
+		offset += len;
+
+		if (!tb_entry[TCA_GRED_VQ_ENTRY]) {
+			fprintf(stderr,
+				"ERROR: Failed to parse Virtual Queue entry\n");
+			continue;
+		}
+
+		parse_rtattr_nested(tb, TCA_GRED_VQ_MAX,
+				    tb_entry[TCA_GRED_VQ_ENTRY]);
+
+		if (!tb[TCA_GRED_VQ_DP]) {
+			fprintf(stderr,
+				"ERROR: Virtual Queue without DP attribute\n");
+			continue;
+		}
+
+		dp = rta_getattr_u32(tb[TCA_GRED_VQ_DP]);
+
+		if (tb[TCA_GRED_VQ_STAT_BYTES])
+			info[dp].bytes =
+				rta_getattr_u32(tb[TCA_GRED_VQ_STAT_BYTES]);
+		if (tb[TCA_GRED_VQ_STAT_PACKETS])
+			info[dp].packets =
+				rta_getattr_u32(tb[TCA_GRED_VQ_STAT_PACKETS]);
+		if (tb[TCA_GRED_VQ_STAT_BACKLOG])
+			info[dp].backlog =
+				rta_getattr_u32(tb[TCA_GRED_VQ_STAT_BACKLOG]);
+		if (tb[TCA_GRED_VQ_STAT_PROB_DROP])
+			info[dp].prob_drop =
+				rta_getattr_u32(tb[TCA_GRED_VQ_STAT_PROB_DROP]);
+		if (tb[TCA_GRED_VQ_STAT_PROB_MARK])
+			info[dp].prob_mark =
+				rta_getattr_u32(tb[TCA_GRED_VQ_STAT_PROB_MARK]);
+		if (tb[TCA_GRED_VQ_STAT_FORCED_DROP])
+			info[dp].forced_drop =
+				rta_getattr_u32(tb[TCA_GRED_VQ_STAT_FORCED_DROP]);
+		if (tb[TCA_GRED_VQ_STAT_FORCED_MARK])
+			info[dp].forced_mark =
+				rta_getattr_u32(tb[TCA_GRED_VQ_STAT_FORCED_MARK]);
+		if (tb[TCA_GRED_VQ_STAT_PDROP])
+			info[dp].pdrop =
+				rta_getattr_u32(tb[TCA_GRED_VQ_STAT_PDROP]);
+		if (tb[TCA_GRED_VQ_STAT_OTHER])
+			info[dp].other =
+				rta_getattr_u32(tb[TCA_GRED_VQ_STAT_OTHER]);
+		info[dp].flags_present = !!tb[TCA_GRED_VQ_FLAGS];
+		if (tb[TCA_GRED_VQ_FLAGS])
+			info[dp].flags =
+				rta_getattr_u32(tb[TCA_GRED_VQ_FLAGS]);
+	}
+}
+
+static void
+gred_print_stats(struct tc_gred_info *info, struct tc_gred_qopt *qopt)
+{
+	__u64 bytes = info ? info->bytes : qopt->bytesin;
+
+	if (!is_json_context())
+		printf("\n  Queue size: ");
+
+	print_size(PRINT_ANY, "qave", "average %s ", qopt->qave);
+	print_size(PRINT_ANY, "backlog", "current %s ", qopt->backlog);
+
+	if (!is_json_context())
+		printf("\n  Dropped packets: ");
+
+	if (info) {
+		print_uint(PRINT_ANY, "forced_drop", "forced %u ",
+			   info->forced_drop);
+		print_uint(PRINT_ANY, "prob_drop", "early %u ",
+			   info->prob_drop);
+		print_uint(PRINT_ANY, "pdrop", "pdrop %u ", info->pdrop);
+		print_uint(PRINT_ANY, "other", "other %u ", info->other);
+
+		if (!is_json_context())
+			printf("\n  Marked packets: ");
+		print_uint(PRINT_ANY, "forced_mark", "forced %u ",
+			   info->forced_mark);
+		print_uint(PRINT_ANY, "prob_mark", "early %u ",
+			   info->prob_mark);
+	} else {
+		print_uint(PRINT_ANY, "forced_drop", "forced %u ",
+			   qopt->forced);
+		print_uint(PRINT_ANY, "prob_drop", "early %u ", qopt->early);
+		print_uint(PRINT_ANY, "pdrop", "pdrop %u ", qopt->pdrop);
+		print_uint(PRINT_ANY, "other", "other %u ", qopt->other);
+	}
+
+	if (!is_json_context())
+		printf("\n  Total packets: ");
+
+	print_uint(PRINT_ANY, "packets", "%u ", qopt->packets);
+	print_size(PRINT_ANY, "bytes", "(%s) ", bytes);
+}
+
+static int gred_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
+{
+	struct tc_gred_info infos[MAX_DPs] = {};
+	struct rtattr *tb[TCA_GRED_MAX + 1];
+	struct tc_gred_sopt *sopt;
+	struct tc_gred_qopt *qopt;
+	bool vq_info = false;
+	__u32 *max_p = NULL;
+	__u32 *limit = NULL;
+	unsigned int i;
+
+	if (opt == NULL)
+		return 0;
+
+	parse_rtattr_nested(tb, TCA_GRED_MAX, opt);
+
+	if (tb[TCA_GRED_PARMS] == NULL)
+		return -1;
+
+	if (tb[TCA_GRED_MAX_P] &&
+	    RTA_PAYLOAD(tb[TCA_GRED_MAX_P]) >= sizeof(__u32) * MAX_DPs)
+		max_p = RTA_DATA(tb[TCA_GRED_MAX_P]);
+
+	if (tb[TCA_GRED_LIMIT] &&
+	    RTA_PAYLOAD(tb[TCA_GRED_LIMIT]) == sizeof(__u32))
+		limit = RTA_DATA(tb[TCA_GRED_LIMIT]);
+
+	sopt = RTA_DATA(tb[TCA_GRED_DPS]);
+	qopt = RTA_DATA(tb[TCA_GRED_PARMS]);
+	if (RTA_PAYLOAD(tb[TCA_GRED_DPS]) < sizeof(*sopt) ||
+	    RTA_PAYLOAD(tb[TCA_GRED_PARMS]) < sizeof(*qopt)*MAX_DPs) {
+		fprintf(f, "\n GRED received message smaller than expected\n");
+		return -1;
+	}
+
+	if (tb[TCA_GRED_VQ_LIST]) {
+		gred_parse_vqs(infos, tb[TCA_GRED_VQ_LIST]);
+		vq_info = true;
+	}
+
+	print_uint(PRINT_ANY, "dp_cnt", "vqs %u ", sopt->DPs);
+	print_uint(PRINT_ANY, "dp_default", "default %u ", sopt->def_DP);
+
+	if (sopt->grio)
+		print_bool(PRINT_ANY, "grio", "grio ", true);
+	else
+		print_bool(PRINT_ANY, "grio", NULL, false);
+
+	if (limit)
+		print_size(PRINT_ANY, "limit", "limit %s ", *limit);
+
+	tc_red_print_flags(sopt->flags);
+
+	open_json_array(PRINT_JSON, "vqs");
+	for (i = 0; i < MAX_DPs; i++, qopt++) {
+		if (qopt->DP >= MAX_DPs)
+			continue;
+
+		open_json_object(NULL);
+
+		print_uint(PRINT_ANY, "vq", "\n vq %u ", qopt->DP);
+		print_hhu(PRINT_ANY, "prio", "prio %hhu ", qopt->prio);
+		print_size(PRINT_ANY, "limit", "limit %s ", qopt->limit);
+		print_size(PRINT_ANY, "min", "min %s ", qopt->qth_min);
+		print_size(PRINT_ANY, "max", "max %s ", qopt->qth_max);
+
+		if (infos[i].flags_present)
+			tc_red_print_flags(infos[i].flags);
+
+		if (show_details) {
+			print_uint(PRINT_ANY, "ewma", "ewma %u ", qopt->Wlog);
+			if (max_p)
+				print_float(PRINT_ANY, "probability",
+					    "probability %lg ",
+					    max_p[i] / pow(2, 32));
+			else
+				print_uint(PRINT_ANY, "Plog", "Plog %u ",
+					   qopt->Plog);
+			print_uint(PRINT_ANY, "Scell_log", "Scell_log %u ",
+				   qopt->Scell_log);
+		}
+		if (show_stats)
+			gred_print_stats(vq_info ? &infos[i] : NULL, qopt);
+		close_json_object();
+	}
+	close_json_array(PRINT_JSON, "vqs");
+	return 0;
+}
+
+struct qdisc_util gred_qdisc_util = {
+	.id		= "gred",
+	.parse_qopt	= gred_parse_opt,
+	.print_qopt	= gred_print_opt,
+};