tc_util.c revision bd29e35d9de9dc0b9015dd3a178ee2c716ce8301 
1/*
2 * tc_util.c		Misc TC utility functions.
3 *
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.
8 *
9 * Authors:	Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
10 *
11 */
12
13#include <stdio.h>
14#include <stdlib.h>
15#include <unistd.h>
16#include <syslog.h>
17#include <fcntl.h>
18#include <sys/socket.h>
19#include <netinet/in.h>
20#include <arpa/inet.h>
21#include <string.h>
22#include <math.h>
23
24#include "utils.h"
25#include "tc_util.h"
26
27int get_qdisc_handle(__u32 *h, const char *str)
28{
29	__u32 maj;
30	char *p;
31
32	maj = TC_H_UNSPEC;
33	if (strcmp(str, "none") == 0)
34		goto ok;
35	maj = strtoul(str, &p, 16);
36	if (p == str)
37		return -1;
38	maj <<= 16;
39	if (*p != ':' && *p!=0)
40		return -1;
41ok:
42	*h = maj;
43	return 0;
44}
45
46int get_tc_classid(__u32 *h, const char *str)
47{
48	__u32 maj, min;
49	char *p;
50
51	maj = TC_H_ROOT;
52	if (strcmp(str, "root") == 0)
53		goto ok;
54	maj = TC_H_UNSPEC;
55	if (strcmp(str, "none") == 0)
56		goto ok;
57	maj = strtoul(str, &p, 16);
58	if (p == str) {
59		maj = 0;
60		if (*p != ':')
61			return -1;
62	}
63	if (*p == ':') {
64		if (maj >= (1<<16))
65			return -1;
66		maj <<= 16;
67		str = p+1;
68		min = strtoul(str, &p, 16);
69		if (*p != 0)
70			return -1;
71		if (min >= (1<<16))
72			return -1;
73		maj |= min;
74	} else if (*p != 0)
75		return -1;
76
77ok:
78	*h = maj;
79	return 0;
80}
81
82int print_tc_classid(char *buf, int len, __u32 h)
83{
84	if (h == TC_H_ROOT)
85		sprintf(buf, "root");
86	else if (h == TC_H_UNSPEC)
87		snprintf(buf, len, "none");
88	else if (TC_H_MAJ(h) == 0)
89		snprintf(buf, len, ":%x", TC_H_MIN(h));
90	else if (TC_H_MIN(h) == 0)
91		snprintf(buf, len, "%x:", TC_H_MAJ(h)>>16);
92	else
93		snprintf(buf, len, "%x:%x", TC_H_MAJ(h)>>16, TC_H_MIN(h));
94	return 0;
95}
96
97char * sprint_tc_classid(__u32 h, char *buf)
98{
99	if (print_tc_classid(buf, SPRINT_BSIZE-1, h))
100		strcpy(buf, "???");
101	return buf;
102}
103
104/* See http://physics.nist.gov/cuu/Units/binary.html */
105static const struct rate_suffix {
106	const char *name;
107	double scale;
108} suffixes[] = {
109	{ "bit",	1. },
110	{ "Kibit",	1024. },
111	{ "kbit",	1000. },
112	{ "mibit",	1024.*1024. },
113	{ "mbit",	1000000. },
114	{ "gibit",	1024.*1024.*1024. },
115	{ "gbit",	1000000000. },
116	{ "tibit",	1024.*1024.*1024.*1024. },
117	{ "tbit",	1000000000000. },
118	{ "Bps",	8. },
119	{ "KiBps",	8.*1024. },
120	{ "KBps",	8000. },
121	{ "MiBps",	8.*1024*1024. },
122	{ "MBps",	8000000. },
123	{ "GiBps",	8.*1024.*1024.*1024. },
124	{ "GBps",	8000000000. },
125	{ "TiBps",	8.*1024.*1024.*1024.*1024. },
126	{ "TBps",	8000000000000. },
127	{ NULL }
128};
129
130
131int get_rate(unsigned *rate, const char *str)
132{
133	char *p;
134	double bps = strtod(str, &p);
135	const struct rate_suffix *s;
136
137	if (p == str)
138		return -1;
139
140	if (*p == '\0') {
141		*rate = bps / 8.;	/* assume bytes/sec */
142		return 0;
143	}
144
145	for (s = suffixes; s->name; ++s) {
146		if (strcasecmp(s->name, p) == 0) {
147			*rate = (bps * s->scale) / 8.;
148			return 0;
149		}
150	}
151
152	return -1;
153}
154
155int get_rate_and_cell(unsigned *rate, int *cell_log, char *str)
156{
157	char * slash = strchr(str, '/');
158
159	if (slash)
160		*slash = 0;
161
162	if (get_rate(rate, str))
163		return -1;
164
165	if (slash) {
166		int cell;
167		int i;
168
169		if (get_integer(&cell, slash+1, 0))
170			return -1;
171		*slash = '/';
172
173		for (i=0; i<32; i++) {
174			if ((1<<i) == cell) {
175				*cell_log = i;
176				return 0;
177			}
178		}
179		return -1;
180	}
181	return 0;
182}
183
184void print_rate(char *buf, int len, __u32 rate)
185{
186	double tmp = (double)rate*8;
187	extern int use_iec;
188
189	if (use_iec) {
190		if (tmp >= 1000.0*1024.0*1024.0)
191			snprintf(buf, len, "%.0fMibit", tmp/1024.0*1024.0);
192		else if (tmp >= 1000.0*1024)
193			snprintf(buf, len, "%.0fKibit", tmp/1024);
194		else
195			snprintf(buf, len, "%.0fbit", tmp);
196	} else {
197		if (tmp >= 1000.0*1000000.0)
198			snprintf(buf, len, "%.0fMbit", tmp/1000000.0);
199		else if (tmp >= 1000.0 * 1000.0)
200			snprintf(buf, len, "%.0fKbit", tmp/1000.0);
201		else
202			snprintf(buf, len, "%.0fbit",  tmp);
203	}
204}
205
206char * sprint_rate(__u32 rate, char *buf)
207{
208	print_rate(buf, SPRINT_BSIZE-1, rate);
209	return buf;
210}
211
212int get_time(unsigned *time, const char *str)
213{
214	double t;
215	char *p;
216
217	t = strtod(str, &p);
218	if (p == str)
219		return -1;
220
221	if (*p) {
222		if (strcasecmp(p, "s") == 0 || strcasecmp(p, "sec")==0 ||
223		    strcasecmp(p, "secs")==0)
224			t *= TIME_UNITS_PER_SEC;
225		else if (strcasecmp(p, "ms") == 0 || strcasecmp(p, "msec")==0 ||
226			 strcasecmp(p, "msecs") == 0)
227			t *= TIME_UNITS_PER_SEC/1000;
228		else if (strcasecmp(p, "us") == 0 || strcasecmp(p, "usec")==0 ||
229			 strcasecmp(p, "usecs") == 0)
230			t *= TIME_UNITS_PER_SEC/1000000;
231		else
232			return -1;
233	}
234
235	*time = t;
236	return 0;
237}
238
239
240void print_time(char *buf, int len, __u32 time)
241{
242	double tmp = time;
243
244	if (tmp >= TIME_UNITS_PER_SEC)
245		snprintf(buf, len, "%.1fs", tmp/TIME_UNITS_PER_SEC);
246	else if (tmp >= TIME_UNITS_PER_SEC/1000)
247		snprintf(buf, len, "%.1fms", tmp/(TIME_UNITS_PER_SEC/1000));
248	else
249		snprintf(buf, len, "%uus", time);
250}
251
252char * sprint_time(__u32 time, char *buf)
253{
254	print_time(buf, SPRINT_BSIZE-1, time);
255	return buf;
256}
257
258char * sprint_ticks(__u32 ticks, char *buf)
259{
260	return sprint_time(tc_core_tick2time(ticks), buf);
261}
262
263int get_size(unsigned *size, const char *str)
264{
265	double sz;
266	char *p;
267
268	sz = strtod(str, &p);
269	if (p == str)
270		return -1;
271
272	if (*p) {
273		if (strcasecmp(p, "kb") == 0 || strcasecmp(p, "k")==0)
274			sz *= 1024;
275		else if (strcasecmp(p, "gb") == 0 || strcasecmp(p, "g")==0)
276			sz *= 1024*1024*1024;
277		else if (strcasecmp(p, "gbit") == 0)
278			sz *= 1024*1024*1024/8;
279		else if (strcasecmp(p, "mb") == 0 || strcasecmp(p, "m")==0)
280			sz *= 1024*1024;
281		else if (strcasecmp(p, "mbit") == 0)
282			sz *= 1024*1024/8;
283		else if (strcasecmp(p, "kbit") == 0)
284			sz *= 1024/8;
285		else if (strcasecmp(p, "b") != 0)
286			return -1;
287	}
288
289	*size = sz;
290	return 0;
291}
292
293int get_size_and_cell(unsigned *size, int *cell_log, char *str)
294{
295	char * slash = strchr(str, '/');
296
297	if (slash)
298		*slash = 0;
299
300	if (get_size(size, str))
301		return -1;
302
303	if (slash) {
304		int cell;
305		int i;
306
307		if (get_integer(&cell, slash+1, 0))
308			return -1;
309		*slash = '/';
310
311		for (i=0; i<32; i++) {
312			if ((1<<i) == cell) {
313				*cell_log = i;
314				return 0;
315			}
316		}
317		return -1;
318	}
319	return 0;
320}
321
322void print_size(char *buf, int len, __u32 sz)
323{
324	double tmp = sz;
325
326	if (sz >= 1024*1024 && fabs(1024*1024*rint(tmp/(1024*1024)) - sz) < 1024)
327		snprintf(buf, len, "%gMb", rint(tmp/(1024*1024)));
328	else if (sz >= 1024 && fabs(1024*rint(tmp/1024) - sz) < 16)
329		snprintf(buf, len, "%gKb", rint(tmp/1024));
330	else
331		snprintf(buf, len, "%ub", sz);
332}
333
334char * sprint_size(__u32 size, char *buf)
335{
336	print_size(buf, SPRINT_BSIZE-1, size);
337	return buf;
338}
339
340static const double max_percent_value = 0xffffffff;
341
342int get_percent(__u32 *percent, const char *str)
343{
344	char *p;
345	double per = strtod(str, &p) / 100.;
346
347	if (per > 1. || per < 0)
348		return -1;
349	if (*p && strcmp(p, "%"))
350		return -1;
351
352	*percent = (unsigned) rint(per * max_percent_value);
353	return 0;
354}
355
356void print_percent(char *buf, int len, __u32 per)
357{
358	snprintf(buf, len, "%g%%", 100. * (double) per / max_percent_value);
359}
360
361char * sprint_percent(__u32 per, char *buf)
362{
363	print_percent(buf, SPRINT_BSIZE-1, per);
364	return buf;
365}
366
367void print_qdisc_handle(char *buf, int len, __u32 h)
368{
369	snprintf(buf, len, "%x:", TC_H_MAJ(h)>>16);
370}
371
372char * sprint_qdisc_handle(__u32 h, char *buf)
373{
374	print_qdisc_handle(buf, SPRINT_BSIZE-1, h);
375	return buf;
376}
377
378char * action_n2a(int action, char *buf, int len)
379{
380	switch (action) {
381	case -1:
382		return "continue";
383		break;
384	case TC_ACT_OK:
385		return "pass";
386		break;
387	case TC_ACT_SHOT:
388		return "drop";
389		break;
390	case TC_ACT_RECLASSIFY:
391		return "reclassify";
392	case TC_ACT_PIPE:
393		return "pipe";
394	case TC_ACT_STOLEN:
395		return "stolen";
396	default:
397		snprintf(buf, len, "%d", action);
398		return buf;
399	}
400}
401
402int action_a2n(char *arg, int *result)
403{
404	int res;
405
406	if (matches(arg, "continue") == 0)
407		res = -1;
408	else if (matches(arg, "drop") == 0)
409		res = TC_ACT_SHOT;
410	else if (matches(arg, "shot") == 0)
411		res = TC_ACT_SHOT;
412	else if (matches(arg, "pass") == 0)
413		res = TC_ACT_OK;
414	else if (strcmp(arg, "ok") == 0)
415		res = TC_ACT_OK;
416	else if (matches(arg, "reclassify") == 0)
417		res = TC_ACT_RECLASSIFY;
418	else {
419		char dummy;
420		if (sscanf(arg, "%d%c", &res, &dummy) != 1)
421			return -1;
422	}
423	*result = res;
424	return 0;
425}
426
427void print_tm(FILE * f, const struct tcf_t *tm)
428{
429	int hz = get_user_hz();
430	if (tm->install != 0)
431		fprintf(f, " installed %u sec", (unsigned)(tm->install/hz));
432	if (tm->lastuse != 0)
433		fprintf(f, " used %u sec", (unsigned)(tm->lastuse/hz));
434	if (tm->expires != 0)
435		fprintf(f, " expires %u sec", (unsigned)(tm->expires/hz));
436}
437
438void print_tcstats2_attr(FILE *fp, struct rtattr *rta, char *prefix, struct rtattr **xstats)
439{
440	SPRINT_BUF(b1);
441	struct rtattr *tbs[TCA_STATS_MAX + 1];
442
443	parse_rtattr_nested(tbs, TCA_STATS_MAX, rta);
444
445	if (tbs[TCA_STATS_BASIC]) {
446		struct gnet_stats_basic bs = {0};
447		memcpy(&bs, RTA_DATA(tbs[TCA_STATS_BASIC]), MIN(RTA_PAYLOAD(tbs[TCA_STATS_BASIC]), sizeof(bs)));
448		fprintf(fp, "%sSent %llu bytes %u pkt",
449			prefix, (unsigned long long) bs.bytes, bs.packets);
450	}
451
452	if (tbs[TCA_STATS_QUEUE]) {
453		struct gnet_stats_queue q = {0};
454		memcpy(&q, RTA_DATA(tbs[TCA_STATS_QUEUE]), MIN(RTA_PAYLOAD(tbs[TCA_STATS_QUEUE]), sizeof(q)));
455		fprintf(fp, " (dropped %u, overlimits %u requeues %u) ",
456			q.drops, q.overlimits, q.requeues);
457	}
458
459	if (tbs[TCA_STATS_RATE_EST]) {
460		struct gnet_stats_rate_est re = {0};
461		memcpy(&re, RTA_DATA(tbs[TCA_STATS_RATE_EST]), MIN(RTA_PAYLOAD(tbs[TCA_STATS_RATE_EST]), sizeof(re)));
462		fprintf(fp, "\n%srate %s %upps ",
463			prefix, sprint_rate(re.bps, b1), re.pps);
464	}
465
466	if (tbs[TCA_STATS_QUEUE]) {
467		struct gnet_stats_queue q = {0};
468		memcpy(&q, RTA_DATA(tbs[TCA_STATS_QUEUE]), MIN(RTA_PAYLOAD(tbs[TCA_STATS_QUEUE]), sizeof(q)));
469		if (!tbs[TCA_STATS_RATE_EST])
470			fprintf(fp, "\n%s", prefix);
471		fprintf(fp, "backlog %s %up requeues %u ",
472			sprint_size(q.backlog, b1), q.qlen, q.requeues);
473	}
474
475	if (xstats)
476		*xstats = tbs[TCA_STATS_APP] ? : NULL;
477}
478
479void print_tcstats_attr(FILE *fp, struct rtattr *tb[], char *prefix, struct rtattr **xstats)
480{
481	SPRINT_BUF(b1);
482
483	if (tb[TCA_STATS2]) {
484		print_tcstats2_attr(fp, tb[TCA_STATS2], prefix, xstats);
485		if (xstats && NULL == *xstats)
486			goto compat_xstats;
487		return;
488	}
489	/* backward compatibility */
490	if (tb[TCA_STATS]) {
491		struct tc_stats st;
492
493		/* handle case where kernel returns more/less than we know about */
494		memset(&st, 0, sizeof(st));
495		memcpy(&st, RTA_DATA(tb[TCA_STATS]), MIN(RTA_PAYLOAD(tb[TCA_STATS]), sizeof(st)));
496
497		fprintf(fp, "%sSent %llu bytes %u pkts (dropped %u, overlimits %u) ",
498			prefix, (unsigned long long)st.bytes, st.packets, st.drops,
499			st.overlimits);
500
501		if (st.bps || st.pps || st.qlen || st.backlog) {
502			fprintf(fp, "\n%s", prefix);
503			if (st.bps || st.pps) {
504				fprintf(fp, "rate ");
505				if (st.bps)
506					fprintf(fp, "%s ", sprint_rate(st.bps, b1));
507				if (st.pps)
508					fprintf(fp, "%upps ", st.pps);
509			}
510			if (st.qlen || st.backlog) {
511				fprintf(fp, "backlog ");
512				if (st.backlog)
513					fprintf(fp, "%s ", sprint_size(st.backlog, b1));
514				if (st.qlen)
515					fprintf(fp, "%up ", st.qlen);
516			}
517		}
518	}
519
520compat_xstats:
521	if (tb[TCA_XSTATS] && xstats)
522		*xstats = tb[TCA_XSTATS];
523}
524
525