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ca697cee4c
mirror_iproute2/tc/q_cbq.c
Matteo Croce 8589eb4efd treewide: refactor help messages 
Every tool in the iproute2 package have one or more function to show
an help message to the user. Some of these functions print the help
line by line with a series of printf call, e.g. ip/xfrm_state.c does
60 fprintf calls.
If we group all the calls to a single one and just concatenate strings,
we save a lot of libc calls and thus object size. The size difference
of the compiled binaries calculated with bloat-o-meter is:

        ip/ip:
        add/remove: 0/0 grow/shrink: 5/15 up/down: 103/-4796 (-4693)
        Total: Before=672591, After=667898, chg -0.70%
        ip/rtmon:
        add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-54 (-54)
        Total: Before=48879, After=48825, chg -0.11%
        tc/tc:
        add/remove: 0/2 grow/shrink: 31/10 up/down: 882/-6133 (-5251)
        Total: Before=351912, After=346661, chg -1.49%
        bridge/bridge:
        add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-459 (-459)
        Total: Before=70502, After=70043, chg -0.65%
        misc/lnstat:
        add/remove: 0/1 grow/shrink: 1/0 up/down: 48/-486 (-438)
        Total: Before=9960, After=9522, chg -4.40%
        tipc/tipc:
        add/remove: 0/0 grow/shrink: 1/1 up/down: 18/-62 (-44)
        Total: Before=79182, After=79138, chg -0.06%

While at it, indent some strings which were starting at column 0,
and use tabs where possible, to have a consistent style across helps.

Signed-off-by: Matteo Croce <mcroce@redhat.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
2019-05-20 14:35:07 -07:00

601 lines
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/*
* q_cbq.c CBQ.
*
* 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: 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 "utils.h"
#include "tc_util.h"
#include "tc_cbq.h"
static void explain_class(void)
{
fprintf(stderr,
"Usage: ... cbq bandwidth BPS rate BPS maxburst PKTS [ avpkt BYTES ]\n"
" [ minburst PKTS ] [ bounded ] [ isolated ]\n"
" [ allot BYTES ] [ mpu BYTES ] [ weight RATE ]\n"
" [ prio NUMBER ] [ cell BYTES ] [ ewma LOG ]\n"
" [ estimator INTERVAL TIME_CONSTANT ]\n"
" [ split CLASSID ] [ defmap MASK/CHANGE ]\n"
" [ overhead BYTES ] [ linklayer TYPE ]\n");
}
static void explain(void)
{
fprintf(stderr,
"Usage: ... cbq bandwidth BPS avpkt BYTES [ mpu BYTES ]\n"
" [ cell BYTES ] [ ewma LOG ]\n");
}
static void explain1(char *arg)
{
fprintf(stderr, "Illegal \"%s\"\n", arg);
}
static int cbq_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n, const char *dev)
{
struct tc_ratespec r = {};
struct tc_cbq_lssopt lss = {};
__u32 rtab[256];
unsigned mpu = 0, avpkt = 0, allot = 0;
unsigned short overhead = 0;
unsigned int linklayer = LINKLAYER_ETHERNET; /* Assume ethernet */
int cell_log = -1;
int ewma_log = -1;
struct rtattr *tail;
while (argc > 0) {
if (matches(*argv, "bandwidth") == 0 ||
matches(*argv, "rate") == 0) {
NEXT_ARG();
if (strchr(*argv, '%')) {
if (get_percent_rate(&r.rate, *argv, dev)) {
explain1("bandwidth");
return -1;
}
} else if (get_rate(&r.rate, *argv)) {
explain1("bandwidth");
return -1;
}
} else if (matches(*argv, "ewma") == 0) {
NEXT_ARG();
if (get_integer(&ewma_log, *argv, 0)) {
explain1("ewma");
return -1;
}
if (ewma_log > 31) {
fprintf(stderr, "ewma_log must be < 32\n");
return -1;
}
} else if (matches(*argv, "cell") == 0) {
unsigned int cell;
int i;
NEXT_ARG();
if (get_size(&cell, *argv)) {
explain1("cell");
return -1;
}
for (i = 0; i < 32; i++)
if ((1<<i) == cell)
break;
if (i >= 32) {
fprintf(stderr, "cell must be 2^n\n");
return -1;
}
cell_log = i;
} else if (matches(*argv, "avpkt") == 0) {
NEXT_ARG();
if (get_size(&avpkt, *argv)) {
explain1("avpkt");
return -1;
}
} else if (matches(*argv, "mpu") == 0) {
NEXT_ARG();
if (get_size(&mpu, *argv)) {
explain1("mpu");
return -1;
}
} else if (matches(*argv, "allot") == 0) {
NEXT_ARG();
/* Accept and ignore "allot" for backward compatibility */
if (get_size(&allot, *argv)) {
explain1("allot");
return -1;
}
} else if (matches(*argv, "overhead") == 0) {
NEXT_ARG();
if (get_u16(&overhead, *argv, 10)) {
explain1("overhead"); return -1;
}
} else if (matches(*argv, "linklayer") == 0) {
NEXT_ARG();
if (get_linklayer(&linklayer, *argv)) {
explain1("linklayer"); return -1;
}
} else if (matches(*argv, "help") == 0) {
explain();
return -1;
} else {
fprintf(stderr, "What is \"%s\"?\n", *argv);
explain();
return -1;
}
argc--; argv++;
}
/* OK. All options are parsed. */
if (r.rate == 0) {
fprintf(stderr, "CBQ: bandwidth is required parameter.\n");
return -1;
}
if (avpkt == 0) {
fprintf(stderr, "CBQ: \"avpkt\" is required.\n");
return -1;
}
if (allot < (avpkt*3)/2)
allot = (avpkt*3)/2;
r.mpu = mpu;
r.overhead = overhead;
if (tc_calc_rtable(&r, rtab, cell_log, allot, linklayer) < 0) {
fprintf(stderr, "CBQ: failed to calculate rate table.\n");
return -1;
}
if (ewma_log < 0)
ewma_log = TC_CBQ_DEF_EWMA;
lss.ewma_log = ewma_log;
lss.maxidle = tc_calc_xmittime(r.rate, avpkt);
lss.change = TCF_CBQ_LSS_MAXIDLE|TCF_CBQ_LSS_EWMA|TCF_CBQ_LSS_AVPKT;
lss.avpkt = avpkt;
tail = addattr_nest(n, 1024, TCA_OPTIONS);
addattr_l(n, 1024, TCA_CBQ_RATE, &r, sizeof(r));
addattr_l(n, 1024, TCA_CBQ_LSSOPT, &lss, sizeof(lss));
addattr_l(n, 3024, TCA_CBQ_RTAB, rtab, 1024);
if (show_raw) {
int i;
for (i = 0; i < 256; i++)
printf("%u ", rtab[i]);
printf("\n");
}
addattr_nest_end(n, tail);
return 0;
}
static int cbq_parse_class_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n, const char *dev)
{
int wrr_ok = 0, fopt_ok = 0;
struct tc_ratespec r = {};
struct tc_cbq_lssopt lss = {};
struct tc_cbq_wrropt wrr = {};
struct tc_cbq_fopt fopt = {};
__u32 rtab[256];
unsigned mpu = 0;
int cell_log = -1;
int ewma_log = -1;
unsigned int bndw = 0;
unsigned minburst = 0, maxburst = 0;
unsigned short overhead = 0;
unsigned int linklayer = LINKLAYER_ETHERNET; /* Assume ethernet */
struct rtattr *tail;
while (argc > 0) {
if (matches(*argv, "rate") == 0) {
NEXT_ARG();
if (strchr(*argv, '%')) {
if (get_percent_rate(&r.rate, *argv, dev)) {
explain1("rate");
return -1;
}
} else if (get_rate(&r.rate, *argv)) {
explain1("rate");
return -1;
}
} else if (matches(*argv, "bandwidth") == 0) {
NEXT_ARG();
if (strchr(*argv, '%')) {
if (get_percent_rate(&bndw, *argv, dev)) {
explain1("bandwidth");
return -1;
}
} else if (get_rate(&bndw, *argv)) {
explain1("bandwidth");
return -1;
}
} else if (matches(*argv, "minidle") == 0) {
NEXT_ARG();
if (get_u32(&lss.minidle, *argv, 0)) {
explain1("minidle");
return -1;
}
lss.change |= TCF_CBQ_LSS_MINIDLE;
} else if (matches(*argv, "minburst") == 0) {
NEXT_ARG();
if (get_u32(&minburst, *argv, 0)) {
explain1("minburst");
return -1;
}
lss.change |= TCF_CBQ_LSS_OFFTIME;
} else if (matches(*argv, "maxburst") == 0) {
NEXT_ARG();
if (get_u32(&maxburst, *argv, 0)) {
explain1("maxburst");
return -1;
}
lss.change |= TCF_CBQ_LSS_MAXIDLE;
} else if (matches(*argv, "bounded") == 0) {
lss.flags |= TCF_CBQ_LSS_BOUNDED;
lss.change |= TCF_CBQ_LSS_FLAGS;
} else if (matches(*argv, "borrow") == 0) {
lss.flags &= ~TCF_CBQ_LSS_BOUNDED;
lss.change |= TCF_CBQ_LSS_FLAGS;
} else if (matches(*argv, "isolated") == 0) {
lss.flags |= TCF_CBQ_LSS_ISOLATED;
lss.change |= TCF_CBQ_LSS_FLAGS;
} else if (matches(*argv, "sharing") == 0) {
lss.flags &= ~TCF_CBQ_LSS_ISOLATED;
lss.change |= TCF_CBQ_LSS_FLAGS;
} else if (matches(*argv, "ewma") == 0) {
NEXT_ARG();
if (get_integer(&ewma_log, *argv, 0)) {
explain1("ewma");
return -1;
}
if (ewma_log > 31) {
fprintf(stderr, "ewma_log must be < 32\n");
return -1;
}
lss.change |= TCF_CBQ_LSS_EWMA;
} else if (matches(*argv, "cell") == 0) {
unsigned int cell;
int i;
NEXT_ARG();
if (get_size(&cell, *argv)) {
explain1("cell");
return -1;
}
for (i = 0; i < 32; i++)
if ((1<<i) == cell)
break;
if (i >= 32) {
fprintf(stderr, "cell must be 2^n\n");
return -1;
}
cell_log = i;
} else if (matches(*argv, "prio") == 0) {
unsigned int prio;
NEXT_ARG();
if (get_u32(&prio, *argv, 0)) {
explain1("prio");
return -1;
}
if (prio > TC_CBQ_MAXPRIO) {
fprintf(stderr, "\"prio\" must be number in the range 1...%d\n", TC_CBQ_MAXPRIO);
return -1;
}
wrr.priority = prio;
wrr_ok++;
} else if (matches(*argv, "allot") == 0) {
NEXT_ARG();
if (get_size(&wrr.allot, *argv)) {
explain1("allot");
return -1;
}
} else if (matches(*argv, "avpkt") == 0) {
NEXT_ARG();
if (get_size(&lss.avpkt, *argv)) {
explain1("avpkt");
return -1;
}
lss.change |= TCF_CBQ_LSS_AVPKT;
} else if (matches(*argv, "mpu") == 0) {
NEXT_ARG();
if (get_size(&mpu, *argv)) {
explain1("mpu");
return -1;
}
} else if (matches(*argv, "weight") == 0) {
NEXT_ARG();
if (get_size(&wrr.weight, *argv)) {
explain1("weight");
return -1;
}
wrr_ok++;
} else if (matches(*argv, "split") == 0) {
NEXT_ARG();
if (get_tc_classid(&fopt.split, *argv)) {
fprintf(stderr, "Invalid split node ID.\n");
return -1;
}
fopt_ok++;
} else if (matches(*argv, "defmap") == 0) {
int err;
NEXT_ARG();
err = sscanf(*argv, "%08x/%08x", &fopt.defmap, &fopt.defchange);
if (err < 1) {
fprintf(stderr, "Invalid defmap, should be MASK32[/MASK]\n");
return -1;
}
if (err == 1)
fopt.defchange = ~0;
fopt_ok++;
} else if (matches(*argv, "overhead") == 0) {
NEXT_ARG();
if (get_u16(&overhead, *argv, 10)) {
explain1("overhead"); return -1;
}
} else if (matches(*argv, "linklayer") == 0) {
NEXT_ARG();
if (get_linklayer(&linklayer, *argv)) {
explain1("linklayer"); return -1;
}
} else if (matches(*argv, "help") == 0) {
explain_class();
return -1;
} else {
fprintf(stderr, "What is \"%s\"?\n", *argv);
explain_class();
return -1;
}
argc--; argv++;
}
/* OK. All options are parsed. */
/* 1. Prepare link sharing scheduler parameters */
if (r.rate) {
unsigned int pktsize = wrr.allot;
if (wrr.allot < (lss.avpkt*3)/2)
wrr.allot = (lss.avpkt*3)/2;
r.mpu = mpu;
r.overhead = overhead;
if (tc_calc_rtable(&r, rtab, cell_log, pktsize, linklayer) < 0) {
fprintf(stderr, "CBQ: failed to calculate rate table.\n");
return -1;
}
}
if (ewma_log < 0)
ewma_log = TC_CBQ_DEF_EWMA;
lss.ewma_log = ewma_log;
if (lss.change&(TCF_CBQ_LSS_OFFTIME|TCF_CBQ_LSS_MAXIDLE)) {
if (lss.avpkt == 0) {
fprintf(stderr, "CBQ: avpkt is required for max/minburst.\n");
return -1;
}
if (bndw == 0 || r.rate == 0) {
fprintf(stderr, "CBQ: bandwidth&rate are required for max/minburst.\n");
return -1;
}
}
if (wrr.priority == 0 && (n->nlmsg_flags&NLM_F_EXCL)) {
wrr_ok = 1;
wrr.priority = TC_CBQ_MAXPRIO;
if (wrr.allot == 0)
wrr.allot = (lss.avpkt*3)/2;
}
if (wrr_ok) {
if (wrr.weight == 0)
wrr.weight = (wrr.priority == TC_CBQ_MAXPRIO) ? 1 : r.rate;
if (wrr.allot == 0) {
fprintf(stderr, "CBQ: \"allot\" is required to set WRR parameters.\n");
return -1;
}
}
if (lss.change&TCF_CBQ_LSS_MAXIDLE) {
lss.maxidle = tc_cbq_calc_maxidle(bndw, r.rate, lss.avpkt, ewma_log, maxburst);
lss.change |= TCF_CBQ_LSS_MAXIDLE;
lss.change |= TCF_CBQ_LSS_EWMA|TCF_CBQ_LSS_AVPKT;
}
if (lss.change&TCF_CBQ_LSS_OFFTIME) {
lss.offtime = tc_cbq_calc_offtime(bndw, r.rate, lss.avpkt, ewma_log, minburst);
lss.change |= TCF_CBQ_LSS_OFFTIME;
lss.change |= TCF_CBQ_LSS_EWMA|TCF_CBQ_LSS_AVPKT;
}
if (lss.change&TCF_CBQ_LSS_MINIDLE) {
lss.minidle <<= lss.ewma_log;
lss.change |= TCF_CBQ_LSS_EWMA;
}
tail = addattr_nest(n, 1024, TCA_OPTIONS);
if (lss.change) {
lss.change |= TCF_CBQ_LSS_FLAGS;
addattr_l(n, 1024, TCA_CBQ_LSSOPT, &lss, sizeof(lss));
}
if (wrr_ok)
addattr_l(n, 1024, TCA_CBQ_WRROPT, &wrr, sizeof(wrr));
if (fopt_ok)
addattr_l(n, 1024, TCA_CBQ_FOPT, &fopt, sizeof(fopt));
if (r.rate) {
addattr_l(n, 1024, TCA_CBQ_RATE, &r, sizeof(r));
addattr_l(n, 3024, TCA_CBQ_RTAB, rtab, 1024);
if (show_raw) {
int i;
for (i = 0; i < 256; i++)
printf("%u ", rtab[i]);
printf("\n");
}
}
addattr_nest_end(n, tail);
return 0;
}
static int cbq_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
{
struct rtattr *tb[TCA_CBQ_MAX+1];
struct tc_ratespec *r = NULL;
struct tc_cbq_lssopt *lss = NULL;
struct tc_cbq_wrropt *wrr = NULL;
struct tc_cbq_fopt *fopt = NULL;
struct tc_cbq_ovl *ovl = NULL;
unsigned int linklayer;
SPRINT_BUF(b1);
SPRINT_BUF(b2);
if (opt == NULL)
return 0;
parse_rtattr_nested(tb, TCA_CBQ_MAX, opt);
if (tb[TCA_CBQ_RATE]) {
if (RTA_PAYLOAD(tb[TCA_CBQ_RATE]) < sizeof(*r))
fprintf(stderr, "CBQ: too short rate opt\n");
else
r = RTA_DATA(tb[TCA_CBQ_RATE]);
}
if (tb[TCA_CBQ_LSSOPT]) {
if (RTA_PAYLOAD(tb[TCA_CBQ_LSSOPT]) < sizeof(*lss))
fprintf(stderr, "CBQ: too short lss opt\n");
else
lss = RTA_DATA(tb[TCA_CBQ_LSSOPT]);
}
if (tb[TCA_CBQ_WRROPT]) {
if (RTA_PAYLOAD(tb[TCA_CBQ_WRROPT]) < sizeof(*wrr))
fprintf(stderr, "CBQ: too short wrr opt\n");
else
wrr = RTA_DATA(tb[TCA_CBQ_WRROPT]);
}
if (tb[TCA_CBQ_FOPT]) {
if (RTA_PAYLOAD(tb[TCA_CBQ_FOPT]) < sizeof(*fopt))
fprintf(stderr, "CBQ: too short fopt\n");
else
fopt = RTA_DATA(tb[TCA_CBQ_FOPT]);
}
if (tb[TCA_CBQ_OVL_STRATEGY]) {
if (RTA_PAYLOAD(tb[TCA_CBQ_OVL_STRATEGY]) < sizeof(*ovl))
fprintf(stderr, "CBQ: too short overlimit strategy %u/%u\n",
(unsigned int) RTA_PAYLOAD(tb[TCA_CBQ_OVL_STRATEGY]),
(unsigned int) sizeof(*ovl));
else
ovl = RTA_DATA(tb[TCA_CBQ_OVL_STRATEGY]);
}
if (r) {
char buf[64];
print_rate(buf, sizeof(buf), r->rate);
fprintf(f, "rate %s ", buf);
linklayer = (r->linklayer & TC_LINKLAYER_MASK);
if (linklayer > TC_LINKLAYER_ETHERNET || show_details)
fprintf(f, "linklayer %s ", sprint_linklayer(linklayer, b2));
if (show_details) {
fprintf(f, "cell %ub ", 1<<r->cell_log);
if (r->mpu)
fprintf(f, "mpu %ub ", r->mpu);
if (r->overhead)
fprintf(f, "overhead %ub ", r->overhead);
}
}
if (lss && lss->flags) {
int comma = 0;
fprintf(f, "(");
if (lss->flags&TCF_CBQ_LSS_BOUNDED) {
fprintf(f, "bounded");
comma = 1;
}
if (lss->flags&TCF_CBQ_LSS_ISOLATED) {
if (comma)
fprintf(f, ",");
fprintf(f, "isolated");
}
fprintf(f, ") ");
}
if (wrr) {
if (wrr->priority != TC_CBQ_MAXPRIO)
fprintf(f, "prio %u", wrr->priority);
else
fprintf(f, "prio no-transmit");
if (show_details) {
char buf[64];
fprintf(f, "/%u ", wrr->cpriority);
if (wrr->weight != 1) {
print_rate(buf, sizeof(buf), wrr->weight);
fprintf(f, "weight %s ", buf);
}
if (wrr->allot)
fprintf(f, "allot %ub ", wrr->allot);
}
}
if (lss && show_details) {
fprintf(f, "\nlevel %u ewma %u avpkt %ub ", lss->level, lss->ewma_log, lss->avpkt);
if (lss->maxidle) {
fprintf(f, "maxidle %s ", sprint_ticks(lss->maxidle>>lss->ewma_log, b1));
if (show_raw)
fprintf(f, "[%08x] ", lss->maxidle);
}
if (lss->minidle != 0x7fffffff) {
fprintf(f, "minidle %s ", sprint_ticks(lss->minidle>>lss->ewma_log, b1));
if (show_raw)
fprintf(f, "[%08x] ", lss->minidle);
}
if (lss->offtime) {
fprintf(f, "offtime %s ", sprint_ticks(lss->offtime, b1));
if (show_raw)
fprintf(f, "[%08x] ", lss->offtime);
}
}
if (fopt && show_details) {
char buf[64];
print_tc_classid(buf, sizeof(buf), fopt->split);
fprintf(f, "\nsplit %s ", buf);
if (fopt->defmap) {
fprintf(f, "defmap %08x", fopt->defmap);
}
}
return 0;
}
static int cbq_print_xstats(struct qdisc_util *qu, FILE *f, struct rtattr *xstats)
{
struct tc_cbq_xstats *st;
if (xstats == NULL)
return 0;
if (RTA_PAYLOAD(xstats) < sizeof(*st))
return -1;
st = RTA_DATA(xstats);
fprintf(f, " borrowed %u overactions %u avgidle %g undertime %g", st->borrows,
st->overactions, (double)st->avgidle, (double)st->undertime);
return 0;
}
struct qdisc_util cbq_qdisc_util = {
.id = "cbq",
.parse_qopt = cbq_parse_opt,
.print_qopt = cbq_print_opt,
.print_xstats = cbq_print_xstats,
.parse_copt = cbq_parse_class_opt,
.print_copt = cbq_print_opt,
};
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