4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
9 * Authors: Martin Devera, devik@cdi.cz
18 #include <sys/socket.h>
19 #include <netinet/in.h>
20 #include <arpa/inet.h>
26 #define HTB_TC_VER 0x30003
27 #if HTB_TC_VER >> 16 != TC_HTB_PROTOVER
28 #error "Different kernel and TC HTB versions"
31 static void explain(void)
33 fprintf(stderr
, "Usage: ... qdisc add ... htb [default N] [r2q N]\n"
35 " default minor id of class to which unclassified packets are sent {0}\n"
36 " r2q DRR quantums are computed as rate in Bps/r2q {10}\n"
37 " debug string of 16 numbers each 0-3 {0}\n\n"
38 " direct_qlen Limit of the direct queue {in packets}\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
56 static void explain1(char *arg
)
58 fprintf(stderr
, "Illegal \"%s\"\n", arg
);
63 static int htb_parse_opt(struct qdisc_util
*qu
, int argc
, char **argv
, struct nlmsghdr
*n
)
65 unsigned int direct_qlen
= ~0U;
66 struct tc_htb_glob opt
= {
71 unsigned int i
; char *p
;
74 if (matches(*argv
, "r2q") == 0) {
76 if (get_u32(&opt
.rate2quantum
, *argv
, 10)) {
77 explain1("r2q"); return -1;
79 } else if (matches(*argv
, "default") == 0) {
81 if (get_u32(&opt
.defcls
, *argv
, 16)) {
82 explain1("default"); return -1;
84 } else if (matches(*argv
, "debug") == 0) {
85 NEXT_ARG(); p
= *argv
;
86 for (i
= 0; i
< 16; i
++, p
++) {
87 if (*p
< '0' || *p
> '3') break;
88 opt
.debug
|= (*p
-'0')<<(2*i
);
90 } else if (matches(*argv
, "direct_qlen") == 0) {
92 if (get_u32(&direct_qlen
, *argv
, 10)) {
93 explain1("direct_qlen"); return -1;
96 fprintf(stderr
, "What is \"%s\"?\n", *argv
);
102 tail
= NLMSG_TAIL(n
);
103 addattr_l(n
, 1024, TCA_OPTIONS
, NULL
, 0);
104 addattr_l(n
, 2024, TCA_HTB_INIT
, &opt
, NLMSG_ALIGN(sizeof(opt
)));
105 if (direct_qlen
!= ~0U)
106 addattr_l(n
, 2024, TCA_HTB_DIRECT_QLEN
,
107 &direct_qlen
, sizeof(direct_qlen
));
108 tail
->rta_len
= (void *) NLMSG_TAIL(n
) - (void *) tail
;
112 static int htb_parse_class_opt(struct qdisc_util
*qu
, int argc
, char **argv
, struct nlmsghdr
*n
)
115 struct tc_htb_opt opt
= {};
116 __u32 rtab
[256], ctab
[256];
117 unsigned buffer
= 0, cbuffer
= 0;
118 int cell_log
= -1, ccell_log
= -1;
119 unsigned int mtu
= 1600; /* eth packet len */
120 unsigned short mpu
= 0;
121 unsigned short overhead
= 0;
122 unsigned int linklayer
= LINKLAYER_ETHERNET
; /* Assume ethernet */
124 __u64 ceil64
= 0, rate64
= 0;
127 if (matches(*argv
, "prio") == 0) {
129 if (get_u32(&opt
.prio
, *argv
, 10)) {
130 explain1("prio"); return -1;
133 } else if (matches(*argv
, "mtu") == 0) {
135 if (get_u32(&mtu
, *argv
, 10)) {
136 explain1("mtu"); return -1;
138 } else if (matches(*argv
, "mpu") == 0) {
140 if (get_u16(&mpu
, *argv
, 10)) {
141 explain1("mpu"); return -1;
143 } else if (matches(*argv
, "overhead") == 0) {
145 if (get_u16(&overhead
, *argv
, 10)) {
146 explain1("overhead"); return -1;
148 } else if (matches(*argv
, "linklayer") == 0) {
150 if (get_linklayer(&linklayer
, *argv
)) {
151 explain1("linklayer"); return -1;
153 } else if (matches(*argv
, "quantum") == 0) {
155 if (get_u32(&opt
.quantum
, *argv
, 10)) {
156 explain1("quantum"); return -1;
158 } else if (matches(*argv
, "burst") == 0 ||
159 strcmp(*argv
, "buffer") == 0 ||
160 strcmp(*argv
, "maxburst") == 0) {
162 if (get_size_and_cell(&buffer
, &cell_log
, *argv
) < 0) {
167 } else if (matches(*argv
, "cburst") == 0 ||
168 strcmp(*argv
, "cbuffer") == 0 ||
169 strcmp(*argv
, "cmaxburst") == 0) {
171 if (get_size_and_cell(&cbuffer
, &ccell_log
, *argv
) < 0) {
176 } else if (strcmp(*argv
, "ceil") == 0) {
179 fprintf(stderr
, "Double \"ceil\" spec\n");
182 if (get_rate64(&ceil64
, *argv
)) {
187 } else if (strcmp(*argv
, "rate") == 0) {
190 fprintf(stderr
, "Double \"rate\" spec\n");
193 if (get_rate64(&rate64
, *argv
)) {
198 } else if (strcmp(*argv
, "help") == 0) {
202 fprintf(stderr
, "What is \"%s\"?\n", *argv
);
213 fprintf(stderr
, "\"rate\" is required.\n");
216 /* if ceil params are missing, use the same as rate */
220 opt
.rate
.rate
= (rate64
>= (1ULL << 32)) ? ~0U : rate64
;
221 opt
.ceil
.rate
= (ceil64
>= (1ULL << 32)) ? ~0U : ceil64
;
223 /* compute minimal allowed burst from rate; mtu is added here to make
224 sute that buffer is larger than mtu and to have some safeguard space */
226 buffer
= rate64
/ get_hz() + mtu
;
228 cbuffer
= ceil64
/ get_hz() + mtu
;
230 opt
.ceil
.overhead
= overhead
;
231 opt
.rate
.overhead
= overhead
;
236 if (tc_calc_rtable(&opt
.rate
, rtab
, cell_log
, mtu
, linklayer
) < 0) {
237 fprintf(stderr
, "htb: failed to calculate rate table.\n");
240 opt
.buffer
= tc_calc_xmittime(rate64
, buffer
);
242 if (tc_calc_rtable(&opt
.ceil
, ctab
, ccell_log
, mtu
, linklayer
) < 0) {
243 fprintf(stderr
, "htb: failed to calculate ceil rate table.\n");
246 opt
.cbuffer
= tc_calc_xmittime(ceil64
, cbuffer
);
248 tail
= NLMSG_TAIL(n
);
249 addattr_l(n
, 1024, TCA_OPTIONS
, NULL
, 0);
251 if (rate64
>= (1ULL << 32))
252 addattr_l(n
, 1124, TCA_HTB_RATE64
, &rate64
, sizeof(rate64
));
254 if (ceil64
>= (1ULL << 32))
255 addattr_l(n
, 1224, TCA_HTB_CEIL64
, &ceil64
, sizeof(ceil64
));
257 addattr_l(n
, 2024, TCA_HTB_PARMS
, &opt
, sizeof(opt
));
258 addattr_l(n
, 3024, TCA_HTB_RTAB
, rtab
, 1024);
259 addattr_l(n
, 4024, TCA_HTB_CTAB
, ctab
, 1024);
260 tail
->rta_len
= (void *) NLMSG_TAIL(n
) - (void *) tail
;
264 static int htb_print_opt(struct qdisc_util
*qu
, FILE *f
, struct rtattr
*opt
)
266 struct rtattr
*tb
[TCA_HTB_MAX
+ 1];
267 struct tc_htb_opt
*hopt
;
268 struct tc_htb_glob
*gopt
;
269 double buffer
, cbuffer
;
270 unsigned int linklayer
;
271 __u64 rate64
, ceil64
;
280 parse_rtattr_nested(tb
, TCA_HTB_MAX
, opt
);
282 if (tb
[TCA_HTB_PARMS
]) {
283 hopt
= RTA_DATA(tb
[TCA_HTB_PARMS
]);
284 if (RTA_PAYLOAD(tb
[TCA_HTB_PARMS
]) < sizeof(*hopt
)) return -1;
287 fprintf(f
, "prio %d ", (int)hopt
->prio
);
289 fprintf(f
, "quantum %d ", (int)hopt
->quantum
);
292 rate64
= hopt
->rate
.rate
;
293 if (tb
[TCA_HTB_RATE64
] &&
294 RTA_PAYLOAD(tb
[TCA_HTB_RATE64
]) >= sizeof(rate64
)) {
295 rate64
= rta_getattr_u64(tb
[TCA_HTB_RATE64
]);
298 ceil64
= hopt
->ceil
.rate
;
299 if (tb
[TCA_HTB_CEIL64
] &&
300 RTA_PAYLOAD(tb
[TCA_HTB_CEIL64
]) >= sizeof(ceil64
))
301 ceil64
= rta_getattr_u64(tb
[TCA_HTB_CEIL64
]);
303 fprintf(f
, "rate %s ", sprint_rate(rate64
, b1
));
304 if (hopt
->rate
.overhead
)
305 fprintf(f
, "overhead %u ", hopt
->rate
.overhead
);
306 buffer
= tc_calc_xmitsize(rate64
, hopt
->buffer
);
308 fprintf(f
, "ceil %s ", sprint_rate(ceil64
, b1
));
309 cbuffer
= tc_calc_xmitsize(ceil64
, hopt
->cbuffer
);
310 linklayer
= (hopt
->rate
.linklayer
& TC_LINKLAYER_MASK
);
311 if (linklayer
> TC_LINKLAYER_ETHERNET
|| show_details
)
312 fprintf(f
, "linklayer %s ", sprint_linklayer(linklayer
, b3
));
314 fprintf(f
, "burst %s/%u mpu %s ",
315 sprint_size(buffer
, b1
),
316 1<<hopt
->rate
.cell_log
,
317 sprint_size(hopt
->rate
.mpu
, b2
));
318 fprintf(f
, "cburst %s/%u mpu %s ",
319 sprint_size(cbuffer
, b1
),
320 1<<hopt
->ceil
.cell_log
,
321 sprint_size(hopt
->ceil
.mpu
, b2
));
322 fprintf(f
, "level %d ", (int)hopt
->level
);
324 fprintf(f
, "burst %s ", sprint_size(buffer
, b1
));
325 fprintf(f
, "cburst %s ", sprint_size(cbuffer
, b1
));
328 fprintf(f
, "buffer [%08x] cbuffer [%08x] ",
329 hopt
->buffer
, hopt
->cbuffer
);
331 if (tb
[TCA_HTB_INIT
]) {
332 gopt
= RTA_DATA(tb
[TCA_HTB_INIT
]);
333 if (RTA_PAYLOAD(tb
[TCA_HTB_INIT
]) < sizeof(*gopt
)) return -1;
335 fprintf(f
, "r2q %d default %x direct_packets_stat %u",
336 gopt
->rate2quantum
, gopt
->defcls
, gopt
->direct_pkts
);
338 fprintf(f
, " ver %d.%d", gopt
->version
>> 16, gopt
->version
& 0xffff);
340 if (tb
[TCA_HTB_DIRECT_QLEN
] &&
341 RTA_PAYLOAD(tb
[TCA_HTB_DIRECT_QLEN
]) >= sizeof(__u32
)) {
342 __u32 direct_qlen
= rta_getattr_u32(tb
[TCA_HTB_DIRECT_QLEN
]);
344 fprintf(f
, " direct_qlen %u", direct_qlen
);
349 static int htb_print_xstats(struct qdisc_util
*qu
, FILE *f
, struct rtattr
*xstats
)
351 struct tc_htb_xstats
*st
;
356 if (RTA_PAYLOAD(xstats
) < sizeof(*st
))
359 st
= RTA_DATA(xstats
);
360 fprintf(f
, " lended: %u borrowed: %u giants: %u\n",
361 st
->lends
, st
->borrows
, st
->giants
);
362 fprintf(f
, " tokens: %d ctokens: %d\n", st
->tokens
, st
->ctokens
);
366 struct qdisc_util htb_qdisc_util
= {
368 .parse_qopt
= htb_parse_opt
,
369 .print_qopt
= htb_print_opt
,
370 .print_xstats
= htb_print_xstats
,
371 .parse_copt
= htb_parse_class_opt
,
372 .print_copt
= htb_print_opt
,