mirror of
https://git.kernel.org/pub/scm/network/iproute2/iproute2.git
synced 2024-11-16 14:35:34 +08:00
d17b136f7d
This big patch was compiled by vimgrepping for memset calls and changing to C99 initializer if applicable. One notable exception is the initialization of union bpf_attr in tc/tc_bpf.c: changing it would break for older gcc versions (at least <=3.4.6). Calls to memset for struct rtattr pointer fields for parse_rtattr*() were just dropped since they are not needed. The changes here allowed the compiler to discover some unused variables, so get rid of them, too. Signed-off-by: Phil Sutter <phil@nwl.cc> Acked-by: David Ahern <dsa@cumulusnetworks.com>
374 lines
10 KiB
C
374 lines
10 KiB
C
/*
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* q_htb.c HTB.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* Authors: Martin Devera, devik@cdi.cz
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <syslog.h>
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#include <fcntl.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <string.h>
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#include "utils.h"
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#include "tc_util.h"
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#define HTB_TC_VER 0x30003
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#if HTB_TC_VER >> 16 != TC_HTB_PROTOVER
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#error "Different kernel and TC HTB versions"
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#endif
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static void explain(void)
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{
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fprintf(stderr, "Usage: ... qdisc add ... htb [default N] [r2q N]\n"
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" [direct_qlen P]\n"
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" default minor id of class to which unclassified packets are sent {0}\n"
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" r2q DRR quantums are computed as rate in Bps/r2q {10}\n"
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" debug string of 16 numbers each 0-3 {0}\n\n"
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" direct_qlen Limit of the direct queue {in packets}\n"
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"... class add ... htb rate R1 [burst B1] [mpu B] [overhead O]\n"
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" [prio P] [slot S] [pslot PS]\n"
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" [ceil R2] [cburst B2] [mtu MTU] [quantum Q]\n"
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" rate rate allocated to this class (class can still borrow)\n"
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" burst max bytes burst which can be accumulated during idle period {computed}\n"
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" mpu minimum packet size used in rate computations\n"
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" overhead per-packet size overhead used in rate computations\n"
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" linklay adapting to a linklayer e.g. atm\n"
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" ceil definite upper class rate (no borrows) {rate}\n"
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" cburst burst but for ceil {computed}\n"
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" mtu max packet size we create rate map for {1600}\n"
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" prio priority of leaf; lower are served first {0}\n"
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" quantum how much bytes to serve from leaf at once {use r2q}\n"
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"\nTC HTB version %d.%d\n", HTB_TC_VER>>16, HTB_TC_VER&0xffff
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);
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}
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static void explain1(char *arg)
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{
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fprintf(stderr, "Illegal \"%s\"\n", arg);
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explain();
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}
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static int htb_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n)
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{
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unsigned int direct_qlen = ~0U;
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struct tc_htb_glob opt = {
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.rate2quantum = 10,
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.version = 3,
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};
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struct rtattr *tail;
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unsigned int i; char *p;
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while (argc > 0) {
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if (matches(*argv, "r2q") == 0) {
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NEXT_ARG();
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if (get_u32(&opt.rate2quantum, *argv, 10)) {
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explain1("r2q"); return -1;
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}
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} else if (matches(*argv, "default") == 0) {
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NEXT_ARG();
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if (get_u32(&opt.defcls, *argv, 16)) {
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explain1("default"); return -1;
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}
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} else if (matches(*argv, "debug") == 0) {
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NEXT_ARG(); p = *argv;
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for (i = 0; i < 16; i++, p++) {
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if (*p < '0' || *p > '3') break;
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opt.debug |= (*p-'0')<<(2*i);
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}
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} else if (matches(*argv, "direct_qlen") == 0) {
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NEXT_ARG();
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if (get_u32(&direct_qlen, *argv, 10)) {
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explain1("direct_qlen"); return -1;
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}
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} else {
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fprintf(stderr, "What is \"%s\"?\n", *argv);
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explain();
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return -1;
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}
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argc--; argv++;
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}
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tail = NLMSG_TAIL(n);
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addattr_l(n, 1024, TCA_OPTIONS, NULL, 0);
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addattr_l(n, 2024, TCA_HTB_INIT, &opt, NLMSG_ALIGN(sizeof(opt)));
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if (direct_qlen != ~0U)
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addattr_l(n, 2024, TCA_HTB_DIRECT_QLEN,
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&direct_qlen, sizeof(direct_qlen));
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tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail;
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return 0;
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}
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static int htb_parse_class_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n)
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{
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int ok = 0;
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struct tc_htb_opt opt = {};
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__u32 rtab[256], ctab[256];
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unsigned buffer = 0, cbuffer = 0;
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int cell_log = -1, ccell_log = -1;
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unsigned int mtu = 1600; /* eth packet len */
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unsigned short mpu = 0;
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unsigned short overhead = 0;
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unsigned int linklayer = LINKLAYER_ETHERNET; /* Assume ethernet */
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struct rtattr *tail;
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__u64 ceil64 = 0, rate64 = 0;
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while (argc > 0) {
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if (matches(*argv, "prio") == 0) {
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NEXT_ARG();
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if (get_u32(&opt.prio, *argv, 10)) {
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explain1("prio"); return -1;
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}
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ok++;
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} else if (matches(*argv, "mtu") == 0) {
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NEXT_ARG();
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if (get_u32(&mtu, *argv, 10)) {
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explain1("mtu"); return -1;
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}
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} else if (matches(*argv, "mpu") == 0) {
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NEXT_ARG();
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if (get_u16(&mpu, *argv, 10)) {
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explain1("mpu"); return -1;
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}
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} else if (matches(*argv, "overhead") == 0) {
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NEXT_ARG();
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if (get_u16(&overhead, *argv, 10)) {
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explain1("overhead"); return -1;
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}
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} else if (matches(*argv, "linklayer") == 0) {
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NEXT_ARG();
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if (get_linklayer(&linklayer, *argv)) {
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explain1("linklayer"); return -1;
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}
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} else if (matches(*argv, "quantum") == 0) {
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NEXT_ARG();
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if (get_u32(&opt.quantum, *argv, 10)) {
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explain1("quantum"); return -1;
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}
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} else if (matches(*argv, "burst") == 0 ||
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strcmp(*argv, "buffer") == 0 ||
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strcmp(*argv, "maxburst") == 0) {
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NEXT_ARG();
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if (get_size_and_cell(&buffer, &cell_log, *argv) < 0) {
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explain1("buffer");
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return -1;
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}
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ok++;
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} else if (matches(*argv, "cburst") == 0 ||
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strcmp(*argv, "cbuffer") == 0 ||
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strcmp(*argv, "cmaxburst") == 0) {
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NEXT_ARG();
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if (get_size_and_cell(&cbuffer, &ccell_log, *argv) < 0) {
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explain1("cbuffer");
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return -1;
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}
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ok++;
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} else if (strcmp(*argv, "ceil") == 0) {
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NEXT_ARG();
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if (ceil64) {
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fprintf(stderr, "Double \"ceil\" spec\n");
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return -1;
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}
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if (get_rate64(&ceil64, *argv)) {
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explain1("ceil");
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return -1;
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}
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ok++;
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} else if (strcmp(*argv, "rate") == 0) {
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NEXT_ARG();
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if (rate64) {
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fprintf(stderr, "Double \"rate\" spec\n");
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return -1;
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}
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if (get_rate64(&rate64, *argv)) {
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explain1("rate");
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return -1;
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}
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ok++;
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} else if (strcmp(*argv, "help") == 0) {
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explain();
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return -1;
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} else {
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fprintf(stderr, "What is \"%s\"?\n", *argv);
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explain();
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return -1;
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}
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argc--; argv++;
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}
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/* if (!ok)
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return 0;*/
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if (!rate64) {
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fprintf(stderr, "\"rate\" is required.\n");
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return -1;
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}
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/* if ceil params are missing, use the same as rate */
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if (!ceil64)
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ceil64 = rate64;
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opt.rate.rate = (rate64 >= (1ULL << 32)) ? ~0U : rate64;
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opt.ceil.rate = (ceil64 >= (1ULL << 32)) ? ~0U : ceil64;
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/* compute minimal allowed burst from rate; mtu is added here to make
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sute that buffer is larger than mtu and to have some safeguard space */
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if (!buffer)
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buffer = rate64 / get_hz() + mtu;
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if (!cbuffer)
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cbuffer = ceil64 / get_hz() + mtu;
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opt.ceil.overhead = overhead;
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opt.rate.overhead = overhead;
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opt.ceil.mpu = mpu;
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opt.rate.mpu = mpu;
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if (tc_calc_rtable(&opt.rate, rtab, cell_log, mtu, linklayer) < 0) {
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fprintf(stderr, "htb: failed to calculate rate table.\n");
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return -1;
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}
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opt.buffer = tc_calc_xmittime(rate64, buffer);
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if (tc_calc_rtable(&opt.ceil, ctab, ccell_log, mtu, linklayer) < 0) {
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fprintf(stderr, "htb: failed to calculate ceil rate table.\n");
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return -1;
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}
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opt.cbuffer = tc_calc_xmittime(ceil64, cbuffer);
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tail = NLMSG_TAIL(n);
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addattr_l(n, 1024, TCA_OPTIONS, NULL, 0);
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if (rate64 >= (1ULL << 32))
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addattr_l(n, 1124, TCA_HTB_RATE64, &rate64, sizeof(rate64));
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if (ceil64 >= (1ULL << 32))
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addattr_l(n, 1224, TCA_HTB_CEIL64, &ceil64, sizeof(ceil64));
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addattr_l(n, 2024, TCA_HTB_PARMS, &opt, sizeof(opt));
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addattr_l(n, 3024, TCA_HTB_RTAB, rtab, 1024);
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addattr_l(n, 4024, TCA_HTB_CTAB, ctab, 1024);
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tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail;
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return 0;
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}
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static int htb_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
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{
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struct rtattr *tb[TCA_HTB_MAX + 1];
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struct tc_htb_opt *hopt;
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struct tc_htb_glob *gopt;
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double buffer, cbuffer;
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unsigned int linklayer;
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__u64 rate64, ceil64;
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SPRINT_BUF(b1);
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SPRINT_BUF(b2);
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SPRINT_BUF(b3);
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if (opt == NULL)
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return 0;
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parse_rtattr_nested(tb, TCA_HTB_MAX, opt);
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if (tb[TCA_HTB_PARMS]) {
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hopt = RTA_DATA(tb[TCA_HTB_PARMS]);
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if (RTA_PAYLOAD(tb[TCA_HTB_PARMS]) < sizeof(*hopt)) return -1;
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if (!hopt->level) {
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fprintf(f, "prio %d ", (int)hopt->prio);
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if (show_details)
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fprintf(f, "quantum %d ", (int)hopt->quantum);
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}
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rate64 = hopt->rate.rate;
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if (tb[TCA_HTB_RATE64] &&
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RTA_PAYLOAD(tb[TCA_HTB_RATE64]) >= sizeof(rate64)) {
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rate64 = rta_getattr_u64(tb[TCA_HTB_RATE64]);
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}
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ceil64 = hopt->ceil.rate;
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if (tb[TCA_HTB_CEIL64] &&
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RTA_PAYLOAD(tb[TCA_HTB_CEIL64]) >= sizeof(ceil64))
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ceil64 = rta_getattr_u64(tb[TCA_HTB_CEIL64]);
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fprintf(f, "rate %s ", sprint_rate(rate64, b1));
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if (hopt->rate.overhead)
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fprintf(f, "overhead %u ", hopt->rate.overhead);
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buffer = tc_calc_xmitsize(rate64, hopt->buffer);
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fprintf(f, "ceil %s ", sprint_rate(ceil64, b1));
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cbuffer = tc_calc_xmitsize(ceil64, hopt->cbuffer);
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linklayer = (hopt->rate.linklayer & TC_LINKLAYER_MASK);
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if (linklayer > TC_LINKLAYER_ETHERNET || show_details)
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fprintf(f, "linklayer %s ", sprint_linklayer(linklayer, b3));
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if (show_details) {
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fprintf(f, "burst %s/%u mpu %s ",
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sprint_size(buffer, b1),
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1<<hopt->rate.cell_log,
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sprint_size(hopt->rate.mpu, b2));
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fprintf(f, "cburst %s/%u mpu %s ",
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sprint_size(cbuffer, b1),
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1<<hopt->ceil.cell_log,
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sprint_size(hopt->ceil.mpu, b2));
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fprintf(f, "level %d ", (int)hopt->level);
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} else {
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fprintf(f, "burst %s ", sprint_size(buffer, b1));
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fprintf(f, "cburst %s ", sprint_size(cbuffer, b1));
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}
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if (show_raw)
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fprintf(f, "buffer [%08x] cbuffer [%08x] ",
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hopt->buffer, hopt->cbuffer);
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}
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if (tb[TCA_HTB_INIT]) {
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gopt = RTA_DATA(tb[TCA_HTB_INIT]);
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if (RTA_PAYLOAD(tb[TCA_HTB_INIT]) < sizeof(*gopt)) return -1;
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fprintf(f, "r2q %d default %x direct_packets_stat %u",
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gopt->rate2quantum, gopt->defcls, gopt->direct_pkts);
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if (show_details)
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fprintf(f, " ver %d.%d", gopt->version >> 16, gopt->version & 0xffff);
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}
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if (tb[TCA_HTB_DIRECT_QLEN] &&
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RTA_PAYLOAD(tb[TCA_HTB_DIRECT_QLEN]) >= sizeof(__u32)) {
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__u32 direct_qlen = rta_getattr_u32(tb[TCA_HTB_DIRECT_QLEN]);
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fprintf(f, " direct_qlen %u", direct_qlen);
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}
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return 0;
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}
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static int htb_print_xstats(struct qdisc_util *qu, FILE *f, struct rtattr *xstats)
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{
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struct tc_htb_xstats *st;
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if (xstats == NULL)
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return 0;
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if (RTA_PAYLOAD(xstats) < sizeof(*st))
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return -1;
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st = RTA_DATA(xstats);
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fprintf(f, " lended: %u borrowed: %u giants: %u\n",
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st->lends, st->borrows, st->giants);
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fprintf(f, " tokens: %d ctokens: %d\n", st->tokens, st->ctokens);
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return 0;
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}
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struct qdisc_util htb_qdisc_util = {
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.id = "htb",
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.parse_qopt = htb_parse_opt,
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.print_qopt = htb_print_opt,
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.print_xstats = htb_print_xstats,
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.parse_copt = htb_parse_class_opt,
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.print_copt = htb_print_opt,
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};
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