| /* |
| * 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" |
| " [direct_qlen P]\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" |
| "... 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) |
| { |
| 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 direct_qlen = ~0U; |
| 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, "direct_qlen") == 0) { |
| NEXT_ARG(); |
| if (get_u32(&direct_qlen, *argv, 10)) { |
| explain1("direct_qlen"); 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); |
| if (direct_qlen != ~0U) |
| addattr_l(n, 1024, TCA_HTB_DIRECT_QLEN, |
| &direct_qlen, sizeof(direct_qlen)); |
| 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_MAX + 1]; |
| struct tc_htb_opt *hopt; |
| struct tc_htb_glob *gopt; |
| double buffer,cbuffer; |
| unsigned int linklayer; |
| SPRINT_BUF(b1); |
| SPRINT_BUF(b2); |
| SPRINT_BUF(b3); |
| SPRINT_BUF(b4); |
| |
| 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) { |
| 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)); |
| if (hopt->rate.overhead) |
| fprintf(f, "overhead %u ", hopt->rate.overhead); |
| 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); |
| linklayer = (hopt->rate.linklayer & TC_LINKLAYER_MASK); |
| if (linklayer > TC_LINKLAYER_ETHERNET || show_details) |
| fprintf(f, "linklayer %s ", sprint_linklayer(linklayer, b4)); |
| 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); |
| } |
| 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]); |
| |
| fprintf(f, " direct_qlen %u", direct_qlen); |
| } |
| 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, |
| }; |