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13#include <stdio.h>
14#include <stdlib.h>
15#include <unistd.h>
16#include <fcntl.h>
17#include <sys/socket.h>
18#include <netinet/in.h>
19#include <arpa/inet.h>
20#include <string.h>
21
22#include "utils.h"
23#include "tc_util.h"
24
25#define HTB_TC_VER 0x30003
26#if HTB_TC_VER >> 16 != TC_HTB_PROTOVER
27#error "Different kernel and TC HTB versions"
28#endif
29
30static void explain(void)
31{
32 fprintf(stderr, "Usage: ... qdisc add ... htb [default N] [r2q N]\n"
33 " [direct_qlen P] [offload]\n"
34 " default minor id of class to which unclassified packets are sent {0}\n"
35 " r2q DRR quantums are computed as rate in Bps/r2q {10}\n"
36 " debug string of 16 numbers each 0-3 {0}\n\n"
37 " direct_qlen Limit of the direct queue {in packets}\n"
38 " offload enable hardware offload\n"
39 "... class add ... htb rate R1 [burst B1] [mpu B] [overhead O]\n"
40 " [prio P] [slot S] [pslot PS]\n"
41 " [ceil R2] [cburst B2] [mtu MTU] [quantum Q]\n"
42 " rate rate allocated to this class (class can still borrow)\n"
43 " burst max bytes burst which can be accumulated during idle period {computed}\n"
44 " mpu minimum packet size used in rate computations\n"
45 " overhead per-packet size overhead used in rate computations\n"
46 " linklay adapting to a linklayer e.g. atm\n"
47 " ceil definite upper class rate (no borrows) {rate}\n"
48 " cburst burst but for ceil {computed}\n"
49 " mtu max packet size we create rate map for {1600}\n"
50 " prio priority of leaf; lower are served first {0}\n"
51 " quantum how much bytes to serve from leaf at once {use r2q}\n"
52 "\nTC HTB version %d.%d\n", HTB_TC_VER>>16, HTB_TC_VER&0xffff
53 );
54}
55
56static void explain1(char *arg)
57{
58 fprintf(stderr, "Illegal \"%s\"\n", arg);
59 explain();
60}
61
62static int htb_parse_opt(struct qdisc_util *qu, int argc,
63 char **argv, struct nlmsghdr *n, const char *dev)
64{
65 unsigned int direct_qlen = ~0U;
66 struct tc_htb_glob opt = {
67 .rate2quantum = 10,
68 .version = 3,
69 };
70 struct rtattr *tail;
71 unsigned int i; char *p;
72 bool offload = false;
73
74 while (argc > 0) {
75 if (matches(*argv, "r2q") == 0) {
76 NEXT_ARG();
77 if (get_u32(&opt.rate2quantum, *argv, 10)) {
78 explain1("r2q"); return -1;
79 }
80 } else if (matches(*argv, "default") == 0) {
81 NEXT_ARG();
82 if (get_u32(&opt.defcls, *argv, 16)) {
83 explain1("default"); return -1;
84 }
85 } else if (matches(*argv, "debug") == 0) {
86 NEXT_ARG(); p = *argv;
87 for (i = 0; i < 16; i++, p++) {
88 if (*p < '0' || *p > '3') break;
89 opt.debug |= (*p-'0')<<(2*i);
90 }
91 } else if (matches(*argv, "direct_qlen") == 0) {
92 NEXT_ARG();
93 if (get_u32(&direct_qlen, *argv, 10)) {
94 explain1("direct_qlen"); return -1;
95 }
96 } else if (matches(*argv, "offload") == 0) {
97 offload = true;
98 } else {
99 fprintf(stderr, "What is \"%s\"?\n", *argv);
100 explain();
101 return -1;
102 }
103 argc--; argv++;
104 }
105 tail = addattr_nest(n, 1024, TCA_OPTIONS);
106 addattr_l(n, 2024, TCA_HTB_INIT, &opt, NLMSG_ALIGN(sizeof(opt)));
107 if (direct_qlen != ~0U)
108 addattr_l(n, 2024, TCA_HTB_DIRECT_QLEN,
109 &direct_qlen, sizeof(direct_qlen));
110 if (offload)
111 addattr(n, 2024, TCA_HTB_OFFLOAD);
112 addattr_nest_end(n, tail);
113 return 0;
114}
115
116static int htb_parse_class_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n, const char *dev)
117{
118 struct tc_htb_opt opt = {};
119 __u32 rtab[256], ctab[256];
120 unsigned buffer = 0, cbuffer = 0;
121 int cell_log = -1, ccell_log = -1;
122 unsigned int mtu = 1600;
123 unsigned short mpu = 0;
124 unsigned short overhead = 0;
125 unsigned int linklayer = LINKLAYER_ETHERNET;
126 struct rtattr *tail;
127 __u64 ceil64 = 0, rate64 = 0;
128 char *param;
129
130 while (argc > 0) {
131 if (matches(*argv, "prio") == 0) {
132 NEXT_ARG();
133 if (get_u32(&opt.prio, *argv, 10)) {
134 explain1("prio"); return -1;
135 }
136 } else if (matches(*argv, "mtu") == 0) {
137 NEXT_ARG();
138 if (get_u32(&mtu, *argv, 10)) {
139 explain1("mtu"); return -1;
140 }
141 } else if (matches(*argv, "mpu") == 0) {
142 NEXT_ARG();
143 if (get_u16(&mpu, *argv, 10)) {
144 explain1("mpu"); return -1;
145 }
146 } else if (matches(*argv, "overhead") == 0) {
147 NEXT_ARG();
148 if (get_u16(&overhead, *argv, 10)) {
149 explain1("overhead"); return -1;
150 }
151 } else if (matches(*argv, "linklayer") == 0) {
152 NEXT_ARG();
153 if (get_linklayer(&linklayer, *argv)) {
154 explain1("linklayer"); return -1;
155 }
156 } else if (matches(*argv, "quantum") == 0) {
157 NEXT_ARG();
158 if (get_u32(&opt.quantum, *argv, 10)) {
159 explain1("quantum"); return -1;
160 }
161 } else if (matches(*argv, "burst") == 0 ||
162 strcmp(*argv, "buffer") == 0 ||
163 strcmp(*argv, "maxburst") == 0) {
164 param = *argv;
165 NEXT_ARG();
166 if (get_size_and_cell(&buffer, &cell_log, *argv) < 0) {
167 explain1(param);
168 return -1;
169 }
170 } else if (matches(*argv, "cburst") == 0 ||
171 strcmp(*argv, "cbuffer") == 0 ||
172 strcmp(*argv, "cmaxburst") == 0) {
173 param = *argv;
174 NEXT_ARG();
175 if (get_size_and_cell(&cbuffer, &ccell_log, *argv) < 0) {
176 explain1(param);
177 return -1;
178 }
179 } else if (strcmp(*argv, "ceil") == 0) {
180 NEXT_ARG();
181 if (ceil64) {
182 fprintf(stderr, "Double \"ceil\" spec\n");
183 return -1;
184 }
185 if (strchr(*argv, '%')) {
186 if (get_percent_rate64(&ceil64, *argv, dev)) {
187 explain1("ceil");
188 return -1;
189 }
190 } else if (get_rate64(&ceil64, *argv)) {
191 explain1("ceil");
192 return -1;
193 }
194 } else if (strcmp(*argv, "rate") == 0) {
195 NEXT_ARG();
196 if (rate64) {
197 fprintf(stderr, "Double \"rate\" spec\n");
198 return -1;
199 }
200 if (strchr(*argv, '%')) {
201 if (get_percent_rate64(&rate64, *argv, dev)) {
202 explain1("rate");
203 return -1;
204 }
205 } else if (get_rate64(&rate64, *argv)) {
206 explain1("rate");
207 return -1;
208 }
209 } else if (strcmp(*argv, "help") == 0) {
210 explain();
211 return -1;
212 } else {
213 fprintf(stderr, "What is \"%s\"?\n", *argv);
214 explain();
215 return -1;
216 }
217 argc--; argv++;
218 }
219
220 if (!rate64) {
221 fprintf(stderr, "\"rate\" is required.\n");
222 return -1;
223 }
224
225 if (!ceil64)
226 ceil64 = rate64;
227
228 opt.rate.rate = (rate64 >= (1ULL << 32)) ? ~0U : rate64;
229 opt.ceil.rate = (ceil64 >= (1ULL << 32)) ? ~0U : ceil64;
230
231
232
233 if (!buffer)
234 buffer = rate64 / get_hz() + mtu;
235 if (!cbuffer)
236 cbuffer = ceil64 / get_hz() + mtu;
237
238 opt.ceil.overhead = overhead;
239 opt.rate.overhead = overhead;
240
241 opt.ceil.mpu = mpu;
242 opt.rate.mpu = mpu;
243
244 if (tc_calc_rtable(&opt.rate, rtab, cell_log, mtu, linklayer) < 0) {
245 fprintf(stderr, "htb: failed to calculate rate table.\n");
246 return -1;
247 }
248 opt.buffer = tc_calc_xmittime(rate64, buffer);
249
250 if (tc_calc_rtable(&opt.ceil, ctab, ccell_log, mtu, linklayer) < 0) {
251 fprintf(stderr, "htb: failed to calculate ceil rate table.\n");
252 return -1;
253 }
254 opt.cbuffer = tc_calc_xmittime(ceil64, cbuffer);
255
256 tail = addattr_nest(n, 1024, TCA_OPTIONS);
257
258 if (rate64 >= (1ULL << 32))
259 addattr_l(n, 1124, TCA_HTB_RATE64, &rate64, sizeof(rate64));
260
261 if (ceil64 >= (1ULL << 32))
262 addattr_l(n, 1224, TCA_HTB_CEIL64, &ceil64, sizeof(ceil64));
263
264 addattr_l(n, 2024, TCA_HTB_PARMS, &opt, sizeof(opt));
265 addattr_l(n, 3024, TCA_HTB_RTAB, rtab, 1024);
266 addattr_l(n, 4024, TCA_HTB_CTAB, ctab, 1024);
267 addattr_nest_end(n, tail);
268 return 0;
269}
270
271static int htb_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
272{
273 struct rtattr *tb[TCA_HTB_MAX + 1];
274 struct tc_htb_opt *hopt;
275 struct tc_htb_glob *gopt;
276 double buffer, cbuffer;
277 unsigned int linklayer;
278 __u64 rate64, ceil64;
279
280 SPRINT_BUF(b1);
281 SPRINT_BUF(b3);
282
283 if (opt == NULL)
284 return 0;
285
286 parse_rtattr_nested(tb, TCA_HTB_MAX, opt);
287
288 if (tb[TCA_HTB_PARMS]) {
289 hopt = RTA_DATA(tb[TCA_HTB_PARMS]);
290 if (RTA_PAYLOAD(tb[TCA_HTB_PARMS]) < sizeof(*hopt)) return -1;
291
292 if (!hopt->level) {
293 print_int(PRINT_ANY, "prio", "prio %d ", (int)hopt->prio);
294 if (show_details)
295 print_int(PRINT_ANY, "quantum", "quantum %d ",
296 (int)hopt->quantum);
297 }
298
299 rate64 = hopt->rate.rate;
300 if (tb[TCA_HTB_RATE64] &&
301 RTA_PAYLOAD(tb[TCA_HTB_RATE64]) >= sizeof(rate64)) {
302 rate64 = rta_getattr_u64(tb[TCA_HTB_RATE64]);
303 }
304
305 ceil64 = hopt->ceil.rate;
306 if (tb[TCA_HTB_CEIL64] &&
307 RTA_PAYLOAD(tb[TCA_HTB_CEIL64]) >= sizeof(ceil64))
308 ceil64 = rta_getattr_u64(tb[TCA_HTB_CEIL64]);
309
310 tc_print_rate(PRINT_FP, NULL, "rate %s ", rate64);
311 if (hopt->rate.overhead)
312 fprintf(f, "overhead %u ", hopt->rate.overhead);
313 buffer = tc_calc_xmitsize(rate64, hopt->buffer);
314
315 tc_print_rate(PRINT_FP, NULL, "ceil %s ", ceil64);
316 cbuffer = tc_calc_xmitsize(ceil64, hopt->cbuffer);
317 linklayer = (hopt->rate.linklayer & TC_LINKLAYER_MASK);
318 if (linklayer > TC_LINKLAYER_ETHERNET || show_details)
319 fprintf(f, "linklayer %s ", sprint_linklayer(linklayer, b3));
320 if (show_details) {
321 print_size(PRINT_FP, NULL, "burst %s/", buffer);
322 fprintf(f, "%u ", 1<<hopt->rate.cell_log);
323 print_size(PRINT_FP, NULL, "mpu %s ", hopt->rate.mpu);
324 print_size(PRINT_FP, NULL, "cburst %s/", cbuffer);
325 fprintf(f, "%u ", 1<<hopt->ceil.cell_log);
326 print_size(PRINT_FP, NULL, "mpu %s ", hopt->ceil.mpu);
327 fprintf(f, "level %d ", (int)hopt->level);
328 } else {
329 print_size(PRINT_FP, NULL, "burst %s ", buffer);
330 print_size(PRINT_FP, NULL, "cburst %s ", cbuffer);
331 }
332 if (show_raw)
333 fprintf(f, "buffer [%08x] cbuffer [%08x] ",
334 hopt->buffer, hopt->cbuffer);
335 }
336 if (tb[TCA_HTB_INIT]) {
337 gopt = RTA_DATA(tb[TCA_HTB_INIT]);
338 if (RTA_PAYLOAD(tb[TCA_HTB_INIT]) < sizeof(*gopt)) return -1;
339
340 print_int(PRINT_ANY, "r2q", "r2q %d", gopt->rate2quantum);
341 print_0xhex(PRINT_ANY, "default", " default %#llx", gopt->defcls);
342 print_uint(PRINT_ANY, "direct_packets_stat",
343 " direct_packets_stat %u", gopt->direct_pkts);
344 if (show_details) {
345 sprintf(b1, "%d.%d", gopt->version >> 16, gopt->version & 0xffff);
346 print_string(PRINT_ANY, "ver", " ver %s", b1);
347 }
348 }
349 if (tb[TCA_HTB_DIRECT_QLEN] &&
350 RTA_PAYLOAD(tb[TCA_HTB_DIRECT_QLEN]) >= sizeof(__u32)) {
351 __u32 direct_qlen = rta_getattr_u32(tb[TCA_HTB_DIRECT_QLEN]);
352
353 print_uint(PRINT_ANY, "direct_qlen", " direct_qlen %u",
354 direct_qlen);
355 }
356 if (tb[TCA_HTB_OFFLOAD])
357 print_null(PRINT_ANY, "offload", " offload", NULL);
358 return 0;
359}
360
361static int htb_print_xstats(struct qdisc_util *qu, FILE *f, struct rtattr *xstats)
362{
363 struct tc_htb_xstats *st;
364
365 if (xstats == NULL)
366 return 0;
367
368 if (RTA_PAYLOAD(xstats) < sizeof(*st))
369 return -1;
370
371 st = RTA_DATA(xstats);
372 fprintf(f, " lended: %u borrowed: %u giants: %u\n",
373 st->lends, st->borrows, st->giants);
374 fprintf(f, " tokens: %d ctokens: %d\n", st->tokens, st->ctokens);
375 return 0;
376}
377
378struct qdisc_util htb_qdisc_util = {
379 .id = "htb",
380 .parse_qopt = htb_parse_opt,
381 .print_qopt = htb_print_opt,
382 .print_xstats = htb_print_xstats,
383 .parse_copt = htb_parse_class_opt,
384 .print_copt = htb_print_opt,
385};
386
