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-rw-r--r--tc/q_htb.c385
1 files changed, 385 insertions, 0 deletions
diff --git a/tc/q_htb.c b/tc/q_htb.c
new file mode 100644
index 0000000..b5f95f6
--- /dev/null
+++ b/tc/q_htb.c
@@ -0,0 +1,385 @@
+/*
+ * 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 <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"
+ " [direct_qlen P] [offload]\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"
+ " direct_qlen Limit of the direct queue {in packets}\n"
+ " offload enable hardware offload\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();
+}
+
+static int htb_parse_opt(struct qdisc_util *qu, int argc,
+ char **argv, struct nlmsghdr *n, const char *dev)
+{
+ unsigned int direct_qlen = ~0U;
+ struct tc_htb_glob opt = {
+ .rate2quantum = 10,
+ .version = 3,
+ };
+ struct rtattr *tail;
+ unsigned int i; char *p;
+ bool offload = false;
+
+ 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 if (matches(*argv, "direct_qlen") == 0) {
+ NEXT_ARG();
+ if (get_u32(&direct_qlen, *argv, 10)) {
+ explain1("direct_qlen"); return -1;
+ }
+ } else if (matches(*argv, "offload") == 0) {
+ offload = true;
+ } else {
+ fprintf(stderr, "What is \"%s\"?\n", *argv);
+ explain();
+ return -1;
+ }
+ argc--; argv++;
+ }
+ tail = addattr_nest(n, 1024, TCA_OPTIONS);
+ addattr_l(n, 2024, TCA_HTB_INIT, &opt, NLMSG_ALIGN(sizeof(opt)));
+ if (direct_qlen != ~0U)
+ addattr_l(n, 2024, TCA_HTB_DIRECT_QLEN,
+ &direct_qlen, sizeof(direct_qlen));
+ if (offload)
+ addattr(n, 2024, TCA_HTB_OFFLOAD);
+ addattr_nest_end(n, tail);
+ return 0;
+}
+
+static int htb_parse_class_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n, const char *dev)
+{
+ struct tc_htb_opt opt = {};
+ __u32 rtab[256], ctab[256];
+ unsigned buffer = 0, cbuffer = 0;
+ int cell_log = -1, ccell_log = -1;
+ unsigned int mtu = 1600; /* eth packet len */
+ unsigned short mpu = 0;
+ unsigned short overhead = 0;
+ unsigned int linklayer = LINKLAYER_ETHERNET; /* Assume ethernet */
+ struct rtattr *tail;
+ __u64 ceil64 = 0, rate64 = 0;
+ char *param;
+
+ while (argc > 0) {
+ if (matches(*argv, "prio") == 0) {
+ NEXT_ARG();
+ if (get_u32(&opt.prio, *argv, 10)) {
+ explain1("prio"); return -1;
+ }
+ } 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) {
+ param = *argv;
+ NEXT_ARG();
+ if (get_size_and_cell(&buffer, &cell_log, *argv) < 0) {
+ explain1(param);
+ return -1;
+ }
+ } else if (matches(*argv, "cburst") == 0 ||
+ strcmp(*argv, "cbuffer") == 0 ||
+ strcmp(*argv, "cmaxburst") == 0) {
+ param = *argv;
+ NEXT_ARG();
+ if (get_size_and_cell(&cbuffer, &ccell_log, *argv) < 0) {
+ explain1(param);
+ return -1;
+ }
+ } else if (strcmp(*argv, "ceil") == 0) {
+ NEXT_ARG();
+ if (ceil64) {
+ fprintf(stderr, "Double \"ceil\" spec\n");
+ return -1;
+ }
+ if (strchr(*argv, '%')) {
+ if (get_percent_rate64(&ceil64, *argv, dev)) {
+ explain1("ceil");
+ return -1;
+ }
+ } else if (get_rate64(&ceil64, *argv)) {
+ explain1("ceil");
+ return -1;
+ }
+ } else if (strcmp(*argv, "rate") == 0) {
+ NEXT_ARG();
+ if (rate64) {
+ fprintf(stderr, "Double \"rate\" spec\n");
+ return -1;
+ }
+ if (strchr(*argv, '%')) {
+ if (get_percent_rate64(&rate64, *argv, dev)) {
+ explain1("rate");
+ return -1;
+ }
+ } else if (get_rate64(&rate64, *argv)) {
+ explain1("rate");
+ return -1;
+ }
+ } else if (strcmp(*argv, "help") == 0) {
+ explain();
+ return -1;
+ } else {
+ fprintf(stderr, "What is \"%s\"?\n", *argv);
+ explain();
+ return -1;
+ }
+ argc--; argv++;
+ }
+
+ if (!rate64) {
+ fprintf(stderr, "\"rate\" is required.\n");
+ return -1;
+ }
+ /* if ceil params are missing, use the same as rate */
+ if (!ceil64)
+ ceil64 = rate64;
+
+ opt.rate.rate = (rate64 >= (1ULL << 32)) ? ~0U : rate64;
+ opt.ceil.rate = (ceil64 >= (1ULL << 32)) ? ~0U : ceil64;
+
+ /* 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 = rate64 / get_hz() + mtu;
+ if (!cbuffer)
+ cbuffer = ceil64 / 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(rate64, 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(ceil64, cbuffer);
+
+ tail = addattr_nest(n, 1024, TCA_OPTIONS);
+
+ if (rate64 >= (1ULL << 32))
+ addattr_l(n, 1124, TCA_HTB_RATE64, &rate64, sizeof(rate64));
+
+ if (ceil64 >= (1ULL << 32))
+ addattr_l(n, 1224, TCA_HTB_CEIL64, &ceil64, sizeof(ceil64));
+
+ 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);
+ addattr_nest_end(n, tail);
+ return 0;
+}
+
+static int htb_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
+{
+ struct rtattr *tb[TCA_HTB_MAX + 1];
+ struct tc_htb_opt *hopt;
+ struct tc_htb_glob *gopt;
+ double buffer, cbuffer;
+ unsigned int linklayer;
+ __u64 rate64, ceil64;
+
+ SPRINT_BUF(b1);
+ SPRINT_BUF(b3);
+
+ if (opt == NULL)
+ return 0;
+
+ parse_rtattr_nested(tb, TCA_HTB_MAX, 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) {
+ print_int(PRINT_ANY, "prio", "prio %d ", (int)hopt->prio);
+ if (show_details)
+ print_int(PRINT_ANY, "quantum", "quantum %d ",
+ (int)hopt->quantum);
+ }
+
+ rate64 = hopt->rate.rate;
+ if (tb[TCA_HTB_RATE64] &&
+ RTA_PAYLOAD(tb[TCA_HTB_RATE64]) >= sizeof(rate64)) {
+ rate64 = rta_getattr_u64(tb[TCA_HTB_RATE64]);
+ }
+
+ ceil64 = hopt->ceil.rate;
+ if (tb[TCA_HTB_CEIL64] &&
+ RTA_PAYLOAD(tb[TCA_HTB_CEIL64]) >= sizeof(ceil64))
+ ceil64 = rta_getattr_u64(tb[TCA_HTB_CEIL64]);
+
+ tc_print_rate(PRINT_FP, NULL, "rate %s ", rate64);
+ if (hopt->rate.overhead)
+ fprintf(f, "overhead %u ", hopt->rate.overhead);
+ buffer = tc_calc_xmitsize(rate64, hopt->buffer);
+
+ tc_print_rate(PRINT_FP, NULL, "ceil %s ", ceil64);
+ cbuffer = tc_calc_xmitsize(ceil64, hopt->cbuffer);
+ linklayer = (hopt->rate.linklayer & TC_LINKLAYER_MASK);
+ if (linklayer > TC_LINKLAYER_ETHERNET || show_details)
+ fprintf(f, "linklayer %s ", sprint_linklayer(linklayer, b3));
+ if (show_details) {
+ print_size(PRINT_FP, NULL, "burst %s/", buffer);
+ fprintf(f, "%u ", 1<<hopt->rate.cell_log);
+ print_size(PRINT_FP, NULL, "mpu %s ", hopt->rate.mpu);
+ print_size(PRINT_FP, NULL, "cburst %s/", cbuffer);
+ fprintf(f, "%u ", 1<<hopt->ceil.cell_log);
+ print_size(PRINT_FP, NULL, "mpu %s ", hopt->ceil.mpu);
+ fprintf(f, "level %d ", (int)hopt->level);
+ } else {
+ print_size(PRINT_FP, NULL, "burst %s ", buffer);
+ print_size(PRINT_FP, NULL, "cburst %s ", cbuffer);
+ }
+ 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;
+
+ print_int(PRINT_ANY, "r2q", "r2q %d", gopt->rate2quantum);
+ print_0xhex(PRINT_ANY, "default", " default %#llx", gopt->defcls);
+ print_uint(PRINT_ANY, "direct_packets_stat",
+ " direct_packets_stat %u", gopt->direct_pkts);
+ if (show_details) {
+ sprintf(b1, "%d.%d", gopt->version >> 16, gopt->version & 0xffff);
+ print_string(PRINT_ANY, "ver", " ver %s", b1);
+ }
+ }
+ if (tb[TCA_HTB_DIRECT_QLEN] &&
+ RTA_PAYLOAD(tb[TCA_HTB_DIRECT_QLEN]) >= sizeof(__u32)) {
+ __u32 direct_qlen = rta_getattr_u32(tb[TCA_HTB_DIRECT_QLEN]);
+
+ print_uint(PRINT_ANY, "direct_qlen", " direct_qlen %u",
+ direct_qlen);
+ }
+ if (tb[TCA_HTB_OFFLOAD])
+ print_null(PRINT_ANY, "offload", " offload", NULL);
+ 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,
+};
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