/*
* q_htb.c HTB.
*
* 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: Martin Devera, devik@cdi.cz
*
*/
#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"
#define HTB_TC_VER 0x30003
#if HTB_TC_VER >> 16 != TC_HTB_PROTOVER
#error "Different kernel and TC HTB versions"
#endif
static void explain(void)
{
fprintf(stderr, "Usage: ... qdisc add ... htb [default N] [r2q N]\n"
" default minor id of class to which unclassified packets are sent {0}\n"
" r2q DRR quantums are computed as rate in Bps/r2q {10}\n"
" debug string of 16 numbers each 0-3 {0}\n\n"
"... class add ... htb rate R1 [burst B1] [mpu B] [overhead O]\n"
" [prio P] [slot S] [pslot PS]\n"
" [ceil R2] [cburst B2] [mtu MTU] [quantum Q]\n"
" rate rate allocated to this class (class can still borrow)\n"
" burst max bytes burst which can be accumulated during idle period {computed}\n"
" mpu minimum packet size used in rate computations\n"
" overhead per-packet size overhead used in rate computations\n"
" linklay adapting to a linklayer e.g. atm\n"
" ceil definite upper class rate (no borrows) {rate}\n"
" cburst burst but for ceil {computed}\n"
" mtu max packet size we create rate map for {1600}\n"
" prio priority of leaf; lower are served first {0}\n"
" quantum how much bytes to serve from leaf at once {use r2q}\n"
"\nTC HTB version %d.%d\n",HTB_TC_VER>>16,HTB_TC_VER&0xffff
);
}
static void explain1(char *arg)
{
fprintf(stderr, "Illegal \"%s\"\n", arg);
explain();
}
#define usage() return(-1)
static int htb_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n)
{
struct tc_htb_glob opt;
struct rtattr *tail;
unsigned i; char *p;
memset(&opt,0,sizeof(opt));
opt.rate2quantum = 10;
opt.version = 3;
while (argc > 0) {
if (matches(*argv, "r2q") == 0) {
NEXT_ARG();
if (get_u32(&opt.rate2quantum, *argv, 10)) {
explain1("r2q"); return -1;
}
} else if (matches(*argv, "default") == 0) {
NEXT_ARG();
if (get_u32(&opt.defcls, *argv, 16)) {
explain1("default"); return -1;
}
} else if (matches(*argv, "debug") == 0) {
NEXT_ARG(); p = *argv;
for (i=0; i<16; i++,p++) {
if (*p<'0' || *p>'3') break;
opt.debug |= (*p-'0')<<(2*i);
}
} else {
fprintf(stderr, "What is \"%s\"?\n", *argv);
explain();
return -1;
}
argc--; argv++;
}
tail = NLMSG_TAIL(n);
addattr_l(n, 1024, TCA_OPTIONS, NULL, 0);
addattr_l(n, 2024, TCA_HTB_INIT, &opt, NLMSG_ALIGN(sizeof(opt)));
tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail;
return 0;
}
static int htb_parse_class_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n)
{
int ok=0;
struct tc_htb_opt opt;
__u32 rtab[256],ctab[256];
unsigned buffer=0,cbuffer=0;
int cell_log=-1,ccell_log = -1;
unsigned mtu;
unsigned short mpu = 0;
unsigned short overhead = 0;
unsigned int linklayer = LINKLAYER_ETHERNET; /* Assume ethernet */
struct rtattr *tail;
memset(&opt, 0, sizeof(opt)); mtu = 1600; /* eth packet len */
while (argc > 0) {
if (matches(*argv, "prio") == 0) {
NEXT_ARG();
if (get_u32(&opt.prio, *argv, 10)) {
explain1("prio"); return -1;
}
ok++;
} else if (matches(*argv, "mtu") == 0) {
NEXT_ARG();
if (get_u32(&mtu, *argv, 10)) {
explain1("mtu"); return -1;
}
} else if (matches(*argv, "mpu") == 0) {
NEXT_ARG();
if (get_u16(&mpu, *argv, 10)) {
explain1("mpu"); 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, "quantum") == 0) {
NEXT_ARG();
if (get_u32(&opt.quantum, *argv, 10)) {
explain1("quantum"); return -1;
}
} else if (matches(*argv, "burst") == 0 ||
strcmp(*argv, "buffer") == 0 ||
strcmp(*argv, "maxburst") == 0) {
NEXT_ARG();
if (get_size_and_cell(&buffer, &cell_log, *argv) < 0) {
explain1("buffer");
return -1;
}
ok++;
} else if (matches(*argv, "cburst") == 0 ||
strcmp(*argv, "cbuffer") == 0 ||
strcmp(*argv, "cmaxburst") == 0) {
NEXT_ARG();
if (get_size_and_cell(&cbuffer, &ccell_log, *argv) < 0) {
explain1("cbuffer");
return -1;
}
ok++;
} else if (strcmp(*argv, "ceil") == 0) {
NEXT_ARG();
if (opt.ceil.rate) {
fprintf(stderr, "Double \"ceil\" spec\n");
return -1;
}
if (get_rate(&opt.ceil.rate, *argv)) {
explain1("ceil");
return -1;
}
ok++;
} else if (strcmp(*argv, "rate") == 0) {
NEXT_ARG();
if (opt.rate.rate) {
fprintf(stderr, "Double \"rate\" spec\n");
return -1;
}
if (get_rate(&opt.rate.rate, *argv)) {
explain1("rate");
return -1;
}
ok++;
} else if (strcmp(*argv, "help") == 0) {
explain();
return -1;
} else {
fprintf(stderr, "What is \"%s\"?\n", *argv);
explain();
return -1;
}
argc--; argv++;
}
/* if (!ok)
return 0;*/
if (opt.rate.rate == 0) {
fprintf(stderr, "\"rate\" is required.\n");
return -1;
}
/* if ceil params are missing, use the same as rate */
if (!opt.ceil.rate) opt.ceil = opt.rate;
/* compute minimal allowed burst from rate; mtu is added here to make
sute that buffer is larger than mtu and to have some safeguard space */
if (!buffer) buffer = opt.rate.rate / get_hz() + mtu;
if (!cbuffer) cbuffer = opt.ceil.rate / get_hz() + mtu;
opt.ceil.overhead = overhead;
opt.rate.overhead = overhead;
opt.ceil.mpu = mpu;
opt.rate.mpu = mpu;
if (tc_calc_rtable(&opt.rate, rtab, cell_log, mtu, linklayer) < 0) {
fprintf(stderr, "htb: failed to calculate rate table.\n");
return -1;
}
opt.buffer = tc_calc_xmittime(opt.rate.rate, buffer);
if (tc_calc_rtable(&opt.ceil, ctab, ccell_log, mtu, linklayer) < 0) {
fprintf(stderr, "htb: failed to calculate ceil rate table.\n");
return -1;
}
opt.cbuffer = tc_calc_xmittime(opt.ceil.rate, cbuffer);
tail = NLMSG_TAIL(n);
addattr_l(n, 1024, TCA_OPTIONS, NULL, 0);
addattr_l(n, 2024, TCA_HTB_PARMS, &opt, sizeof(opt));
addattr_l(n, 3024, TCA_HTB_RTAB, rtab, 1024);
addattr_l(n, 4024, TCA_HTB_CTAB, ctab, 1024);
tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail;
return 0;
}
static int htb_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
{
struct rtattr *tb[TCA_HTB_RTAB+1];
struct tc_htb_opt *hopt;
struct tc_htb_glob *gopt;
double buffer,cbuffer;
SPRINT_BUF(b1);
SPRINT_BUF(b2);
SPRINT_BUF(b3);
if (opt == NULL)
return 0;
parse_rtattr_nested(tb, TCA_HTB_RTAB, opt);
if (tb[TCA_HTB_PARMS]) {
hopt = RTA_DATA(tb[TCA_HTB_PARMS]);
if (RTA_PAYLOAD(tb[TCA_HTB_PARMS]) < sizeof(*hopt)) return -1;
if (!hopt->level) {
fprintf(f, "prio %d ", (int)hopt->prio);
if (show_details)
fprintf(f, "quantum %d ", (int)hopt->quantum);
}
fprintf(f, "rate %s ", sprint_rate(hopt->rate.rate, b1));
buffer = tc_calc_xmitsize(hopt->rate.rate, hopt->buffer);
fprintf(f, "ceil %s ", sprint_rate(hopt->ceil.rate, b1));
cbuffer = tc_calc_xmitsize(hopt->ceil.rate, hopt->cbuffer);
if (show_details) {
fprintf(f, "burst %s/%u mpu %s overhead %s ",
sprint_size(buffer, b1),
1<<hopt->rate.cell_log,
sprint_size(hopt->rate.mpu&0xFF, b2),
sprint_size((hopt->rate.mpu>>8)&0xFF, b3));
fprintf(f, "cburst %s/%u mpu %s overhead %s ",
sprint_size(cbuffer, b1),
1<<hopt->ceil.cell_log,
sprint_size(hopt->ceil.mpu&0xFF, b2),
sprint_size((hopt->ceil.mpu>>8)&0xFF, b3));
fprintf(f, "level %d ", (int)hopt->level);
} else {
fprintf(f, "burst %s ", sprint_size(buffer, b1));
fprintf(f, "cburst %s ", sprint_size(cbuffer, b1));
}
if (show_raw)
fprintf(f, "buffer [%08x] cbuffer [%08x] ",
hopt->buffer,hopt->cbuffer);
}
if (tb[TCA_HTB_INIT]) {
gopt = RTA_DATA(tb[TCA_HTB_INIT]);
if (RTA_PAYLOAD(tb[TCA_HTB_INIT]) < sizeof(*gopt)) return -1;
fprintf(f, "r2q %d default %x direct_packets_stat %u",
gopt->rate2quantum,gopt->defcls,gopt->direct_pkts);
if (show_details)
fprintf(f," ver %d.%d",gopt->version >> 16,gopt->version & 0xffff);
}
return 0;
}
static int htb_print_xstats(struct qdisc_util *qu, FILE *f, struct rtattr *xstats)
{
struct tc_htb_xstats *st;
if (xstats == NULL)
return 0;
if (RTA_PAYLOAD(xstats) < sizeof(*st))
return -1;
st = RTA_DATA(xstats);
fprintf(f, " lended: %u borrowed: %u giants: %u\n",
st->lends,st->borrows,st->giants);
fprintf(f, " tokens: %d ctokens: %d\n", st->tokens,st->ctokens);
return 0;
}
struct qdisc_util htb_qdisc_util = {
.id = "htb",
.parse_qopt = htb_parse_opt,
.print_qopt = htb_print_opt,
.print_xstats = htb_print_xstats,
.parse_copt = htb_parse_class_opt,
.print_copt = htb_print_opt,
};
/* for testing of old one */
struct qdisc_util htb2_qdisc_util = {
.id = "htb2",
.parse_qopt = htb_parse_opt,
.print_qopt = htb_print_opt,
.print_xstats = htb_print_xstats,
.parse_copt = htb_parse_class_opt,
.print_copt = htb_print_opt,
};