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Commit | Line | Data |
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aba5acdf SH |
1 | /* |
2 | * ifstat.c handy utility to read net interface statistics | |
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 | #include <stdio.h> | |
13 | #include <stdlib.h> | |
14 | #include <unistd.h> | |
15 | #include <fcntl.h> | |
16 | #include <string.h> | |
17 | #include <errno.h> | |
18 | #include <time.h> | |
19 | #include <sys/time.h> | |
20 | #include <fnmatch.h> | |
21 | #include <sys/file.h> | |
22 | #include <sys/socket.h> | |
23 | #include <sys/un.h> | |
24 | #include <sys/poll.h> | |
25 | #include <sys/wait.h> | |
26 | #include <sys/stat.h> | |
27 | #include <signal.h> | |
28 | #include <math.h> | |
9f3ea250 | 29 | #include <getopt.h> |
aba5acdf SH |
30 | |
31 | #include <libnetlink.h> | |
fcc16c22 | 32 | #include <json_writer.h> |
daf7bd5c SH |
33 | #include <linux/if.h> |
34 | #include <linux/if_link.h> | |
aba5acdf SH |
35 | |
36 | #include <SNAPSHOT.h> | |
37 | ||
38 | int dump_zeros = 0; | |
39 | int reset_history = 0; | |
40 | int ignore_history = 0; | |
41 | int no_output = 0; | |
ec3e625c | 42 | int json_output = 0; |
aba5acdf SH |
43 | int no_update = 0; |
44 | int scan_interval = 0; | |
45 | int time_constant = 0; | |
46 | int show_errors = 0; | |
fcc16c22 | 47 | int pretty; |
aba5acdf SH |
48 | double W; |
49 | char **patterns; | |
50 | int npatterns; | |
51 | ||
52 | char info_source[128]; | |
53 | int source_mismatch; | |
54 | ||
a571587d | 55 | #define MAXS (sizeof(struct rtnl_link_stats)/sizeof(__u32)) |
aba5acdf SH |
56 | |
57 | struct ifstat_ent | |
58 | { | |
59 | struct ifstat_ent *next; | |
60 | char *name; | |
61 | int ifindex; | |
62 | unsigned long long val[MAXS]; | |
63 | double rate[MAXS]; | |
a571587d | 64 | __u32 ival[MAXS]; |
aba5acdf SH |
65 | }; |
66 | ||
ec3e625c SH |
67 | static const char *stats[MAXS] = { |
68 | "rx_packets", | |
69 | "tx_packets", | |
70 | "rx_bytes", | |
71 | "tx_bytes", | |
72 | "rx_errors", | |
73 | "tx_errors", | |
74 | "rx_dropped", | |
75 | "tx_dropped", | |
76 | "multicast", | |
77 | "collisions", | |
78 | "rx_length_errors", | |
79 | "rx_over_errors", | |
80 | "rx_crc_errors", | |
81 | "rx_frame_errors", | |
82 | "rx_fifo_errors", | |
83 | "rx_missed_errors", | |
84 | "tx_aborted_errors", | |
85 | "tx_carrier_errors", | |
86 | "tx_fifo_errors", | |
87 | "tx_heartbeat_errors", | |
88 | "tx_window_errors", | |
89 | "rx_compressed", | |
90 | "tx_compressed" | |
91 | }; | |
92 | ||
aba5acdf SH |
93 | struct ifstat_ent *kern_db; |
94 | struct ifstat_ent *hist_db; | |
95 | ||
50772dc5 | 96 | static int match(const char *id) |
aba5acdf SH |
97 | { |
98 | int i; | |
99 | ||
100 | if (npatterns == 0) | |
101 | return 1; | |
102 | ||
103 | for (i=0; i<npatterns; i++) { | |
104 | if (!fnmatch(patterns[i], id, 0)) | |
105 | return 1; | |
106 | } | |
107 | return 0; | |
108 | } | |
109 | ||
ae665a52 | 110 | static int get_nlmsg(const struct sockaddr_nl *who, |
50772dc5 | 111 | struct nlmsghdr *m, void *arg) |
aba5acdf SH |
112 | { |
113 | struct ifinfomsg *ifi = NLMSG_DATA(m); | |
114 | struct rtattr * tb[IFLA_MAX+1]; | |
115 | int len = m->nlmsg_len; | |
116 | struct ifstat_ent *n; | |
117 | int i; | |
118 | ||
119 | if (m->nlmsg_type != RTM_NEWLINK) | |
120 | return 0; | |
121 | ||
122 | len -= NLMSG_LENGTH(sizeof(*ifi)); | |
123 | if (len < 0) | |
124 | return -1; | |
125 | ||
126 | if (!(ifi->ifi_flags&IFF_UP)) | |
127 | return 0; | |
128 | ||
aba5acdf SH |
129 | parse_rtattr(tb, IFLA_MAX, IFLA_RTA(ifi), len); |
130 | if (tb[IFLA_IFNAME] == NULL || tb[IFLA_STATS] == NULL) | |
131 | return 0; | |
132 | ||
133 | n = malloc(sizeof(*n)); | |
134 | if (!n) | |
135 | abort(); | |
136 | n->ifindex = ifi->ifi_index; | |
137 | n->name = strdup(RTA_DATA(tb[IFLA_IFNAME])); | |
138 | memcpy(&n->ival, RTA_DATA(tb[IFLA_STATS]), sizeof(n->ival)); | |
139 | memset(&n->rate, 0, sizeof(n->rate)); | |
140 | for (i=0; i<MAXS; i++) | |
141 | n->val[i] = n->ival[i]; | |
142 | n->next = kern_db; | |
143 | kern_db = n; | |
144 | return 0; | |
145 | } | |
146 | ||
d1f28cf1 | 147 | static void load_info(void) |
aba5acdf SH |
148 | { |
149 | struct ifstat_ent *db, *n; | |
150 | struct rtnl_handle rth; | |
151 | ||
152 | if (rtnl_open(&rth, 0) < 0) | |
153 | exit(1); | |
154 | ||
155 | if (rtnl_wilddump_request(&rth, AF_INET, RTM_GETLINK) < 0) { | |
156 | perror("Cannot send dump request"); | |
157 | exit(1); | |
158 | } | |
159 | ||
cd70f3f5 | 160 | if (rtnl_dump_filter(&rth, get_nlmsg, NULL) < 0) { |
aba5acdf SH |
161 | fprintf(stderr, "Dump terminated\n"); |
162 | exit(1); | |
163 | } | |
164 | ||
165 | rtnl_close(&rth); | |
166 | ||
167 | db = kern_db; | |
168 | kern_db = NULL; | |
169 | ||
170 | while (db) { | |
171 | n = db; | |
172 | db = db->next; | |
173 | n->next = kern_db; | |
174 | kern_db = n; | |
175 | } | |
176 | } | |
177 | ||
d1f28cf1 | 178 | static void load_raw_table(FILE *fp) |
aba5acdf SH |
179 | { |
180 | char buf[4096]; | |
181 | struct ifstat_ent *db = NULL; | |
182 | struct ifstat_ent *n; | |
183 | ||
184 | while (fgets(buf, sizeof(buf), fp) != NULL) { | |
185 | char *p; | |
186 | char *next; | |
187 | int i; | |
188 | ||
189 | if (buf[0] == '#') { | |
190 | buf[strlen(buf)-1] = 0; | |
191 | if (info_source[0] && strcmp(info_source, buf+1)) | |
192 | source_mismatch = 1; | |
193 | strncpy(info_source, buf+1, sizeof(info_source)-1); | |
194 | continue; | |
195 | } | |
196 | if ((n = malloc(sizeof(*n))) == NULL) | |
197 | abort(); | |
198 | ||
199 | if (!(p = strchr(buf, ' '))) | |
200 | abort(); | |
201 | *p++ = 0; | |
202 | ||
203 | if (sscanf(buf, "%d", &n->ifindex) != 1) | |
204 | abort(); | |
205 | if (!(next = strchr(p, ' '))) | |
206 | abort(); | |
207 | *next++ = 0; | |
208 | ||
209 | n->name = strdup(p); | |
210 | p = next; | |
211 | ||
212 | for (i=0; i<MAXS; i++) { | |
213 | unsigned rate; | |
214 | if (!(next = strchr(p, ' '))) | |
215 | abort(); | |
216 | *next++ = 0; | |
217 | if (sscanf(p, "%llu", n->val+i) != 1) | |
218 | abort(); | |
a571587d | 219 | n->ival[i] = (__u32)n->val[i]; |
aba5acdf SH |
220 | p = next; |
221 | if (!(next = strchr(p, ' '))) | |
222 | abort(); | |
223 | *next++ = 0; | |
224 | if (sscanf(p, "%u", &rate) != 1) | |
225 | abort(); | |
226 | n->rate[i] = rate; | |
227 | p = next; | |
228 | } | |
229 | n->next = db; | |
230 | db = n; | |
231 | } | |
232 | ||
233 | while (db) { | |
234 | n = db; | |
235 | db = db->next; | |
236 | n->next = kern_db; | |
237 | kern_db = n; | |
238 | } | |
239 | } | |
240 | ||
d1f28cf1 | 241 | static void dump_raw_db(FILE *fp, int to_hist) |
aba5acdf | 242 | { |
fcc16c22 | 243 | json_writer_t *jw = json_output ? jsonw_new(fp) : NULL; |
aba5acdf | 244 | struct ifstat_ent *n, *h; |
ec3e625c | 245 | |
aba5acdf | 246 | h = hist_db; |
fcc16c22 SH |
247 | if (jw) { |
248 | jsonw_pretty(jw, pretty); | |
249 | jsonw_name(jw, info_source); | |
250 | jsonw_start_object(jw); | |
251 | } else | |
ec3e625c | 252 | fprintf(fp, "#%s\n", info_source); |
aba5acdf SH |
253 | |
254 | for (n=kern_db; n; n=n->next) { | |
255 | int i; | |
256 | unsigned long long *vals = n->val; | |
257 | double *rates = n->rate; | |
258 | if (!match(n->name)) { | |
259 | struct ifstat_ent *h1; | |
260 | if (!to_hist) | |
261 | continue; | |
262 | for (h1 = h; h1; h1 = h1->next) { | |
263 | if (h1->ifindex == n->ifindex) { | |
264 | vals = h1->val; | |
265 | rates = h1->rate; | |
266 | h = h1->next; | |
267 | break; | |
268 | } | |
269 | } | |
270 | } | |
ec3e625c | 271 | |
fcc16c22 SH |
272 | if (jw) { |
273 | jsonw_name(jw, n->name); | |
274 | jsonw_start_object(jw); | |
275 | ||
ec3e625c | 276 | for (i=0; i<MAXS && stats[i]; i++) |
fcc16c22 SH |
277 | jsonw_uint_field(jw, stats[i], vals[i]); |
278 | jsonw_end_object(jw); | |
ec3e625c SH |
279 | } else { |
280 | fprintf(fp, "%d %s ", n->ifindex, n->name); | |
281 | for (i=0; i<MAXS; i++) | |
3d0b7439 | 282 | fprintf(fp, "%llu %u ", vals[i], |
ec3e625c SH |
283 | (unsigned)rates[i]); |
284 | fprintf(fp, "\n"); | |
285 | } | |
aba5acdf | 286 | } |
fcc16c22 SH |
287 | if (jw) { |
288 | jsonw_end_object(jw); | |
289 | jsonw_destroy(&jw); | |
290 | } | |
aba5acdf SH |
291 | } |
292 | ||
9f3ea250 SH |
293 | /* use communication definitions of meg/kilo etc */ |
294 | static const unsigned long long giga = 1000000000ull; | |
bb6a21a4 SH |
295 | static const unsigned long long mega = 1000000; |
296 | static const unsigned long long kilo = 1000; | |
aba5acdf | 297 | |
ec3e625c SH |
298 | static void format_rate(FILE *fp, const unsigned long long *vals, |
299 | const double *rates, int i) | |
aba5acdf SH |
300 | { |
301 | char temp[64]; | |
ec3e625c | 302 | |
9f3ea250 SH |
303 | if (vals[i] > giga) |
304 | fprintf(fp, "%7lluM ", vals[i]/mega); | |
305 | else if (vals[i] > mega) | |
306 | fprintf(fp, "%7lluK ", vals[i]/kilo); | |
aba5acdf SH |
307 | else |
308 | fprintf(fp, "%8llu ", vals[i]); | |
309 | ||
9f3ea250 SH |
310 | if (rates[i] > mega) { |
311 | sprintf(temp, "%uM", (unsigned)(rates[i]/mega)); | |
aba5acdf | 312 | fprintf(fp, "%-6s ", temp); |
9f3ea250 SH |
313 | } else if (rates[i] > kilo) { |
314 | sprintf(temp, "%uK", (unsigned)(rates[i]/kilo)); | |
aba5acdf SH |
315 | fprintf(fp, "%-6s ", temp); |
316 | } else | |
317 | fprintf(fp, "%-6u ", (unsigned)rates[i]); | |
318 | } | |
319 | ||
ec3e625c | 320 | static void format_pair(FILE *fp, const unsigned long long *vals, int i, int k) |
aba5acdf SH |
321 | { |
322 | char temp[64]; | |
9f3ea250 SH |
323 | if (vals[i] > giga) |
324 | fprintf(fp, "%7lluM ", vals[i]/mega); | |
325 | else if (vals[i] > mega) | |
326 | fprintf(fp, "%7lluK ", vals[i]/kilo); | |
aba5acdf SH |
327 | else |
328 | fprintf(fp, "%8llu ", vals[i]); | |
329 | ||
9f3ea250 SH |
330 | if (vals[k] > giga) { |
331 | sprintf(temp, "%uM", (unsigned)(vals[k]/mega)); | |
aba5acdf | 332 | fprintf(fp, "%-6s ", temp); |
9f3ea250 SH |
333 | } else if (vals[k] > mega) { |
334 | sprintf(temp, "%uK", (unsigned)(vals[k]/kilo)); | |
aba5acdf SH |
335 | fprintf(fp, "%-6s ", temp); |
336 | } else | |
337 | fprintf(fp, "%-6u ", (unsigned)vals[k]); | |
338 | } | |
339 | ||
d1f28cf1 | 340 | static void print_head(FILE *fp) |
aba5acdf SH |
341 | { |
342 | fprintf(fp, "#%s\n", info_source); | |
343 | fprintf(fp, "%-15s ", "Interface"); | |
344 | ||
345 | fprintf(fp, "%8s/%-6s ", "RX Pkts", "Rate"); | |
346 | fprintf(fp, "%8s/%-6s ", "TX Pkts", "Rate"); | |
347 | fprintf(fp, "%8s/%-6s ", "RX Data", "Rate"); | |
348 | fprintf(fp, "%8s/%-6s\n","TX Data", "Rate"); | |
349 | ||
350 | if (!show_errors) { | |
351 | fprintf(fp, "%-15s ", ""); | |
352 | fprintf(fp, "%8s/%-6s ", "RX Errs", "Drop"); | |
353 | fprintf(fp, "%8s/%-6s ", "TX Errs", "Drop"); | |
354 | fprintf(fp, "%8s/%-6s ", "RX Over", "Rate"); | |
355 | fprintf(fp, "%8s/%-6s\n","TX Coll", "Rate"); | |
356 | } else { | |
357 | fprintf(fp, "%-15s ", ""); | |
358 | fprintf(fp, "%8s/%-6s ", "RX Errs", "Rate"); | |
359 | fprintf(fp, "%8s/%-6s ", "RX Drop", "Rate"); | |
360 | fprintf(fp, "%8s/%-6s ", "RX Over", "Rate"); | |
361 | fprintf(fp, "%8s/%-6s\n","RX Leng", "Rate"); | |
362 | ||
363 | fprintf(fp, "%-15s ", ""); | |
364 | fprintf(fp, "%8s/%-6s ", "RX Crc", "Rate"); | |
365 | fprintf(fp, "%8s/%-6s ", "RX Frm", "Rate"); | |
366 | fprintf(fp, "%8s/%-6s ", "RX Fifo", "Rate"); | |
367 | fprintf(fp, "%8s/%-6s\n","RX Miss", "Rate"); | |
368 | ||
369 | fprintf(fp, "%-15s ", ""); | |
370 | fprintf(fp, "%8s/%-6s ", "TX Errs", "Rate"); | |
371 | fprintf(fp, "%8s/%-6s ", "TX Drop", "Rate"); | |
372 | fprintf(fp, "%8s/%-6s ", "TX Coll", "Rate"); | |
373 | fprintf(fp, "%8s/%-6s\n","TX Carr", "Rate"); | |
374 | ||
375 | fprintf(fp, "%-15s ", ""); | |
376 | fprintf(fp, "%8s/%-6s ", "TX Abrt", "Rate"); | |
377 | fprintf(fp, "%8s/%-6s ", "TX Fifo", "Rate"); | |
378 | fprintf(fp, "%8s/%-6s ", "TX Hear", "Rate"); | |
379 | fprintf(fp, "%8s/%-6s\n","TX Wind", "Rate"); | |
380 | } | |
381 | } | |
382 | ||
fcc16c22 | 383 | static void print_one_json(json_writer_t *jw, const struct ifstat_ent *n, |
ec3e625c SH |
384 | const unsigned long long *vals) |
385 | { | |
fcc16c22 SH |
386 | int i, m = show_errors ? 20 : 10; |
387 | ||
388 | jsonw_name(jw, n->name); | |
389 | jsonw_start_object(jw); | |
390 | ||
391 | for (i=0; i < m && stats[i]; i++) | |
392 | jsonw_uint_field(jw, stats[i], vals[i]); | |
393 | ||
394 | jsonw_end_object(jw); | |
ec3e625c SH |
395 | } |
396 | ||
397 | static void print_one_if(FILE *fp, const struct ifstat_ent *n, | |
398 | const unsigned long long *vals) | |
aba5acdf SH |
399 | { |
400 | int i; | |
ec3e625c | 401 | |
aba5acdf SH |
402 | fprintf(fp, "%-15s ", n->name); |
403 | for (i=0; i<4; i++) | |
404 | format_rate(fp, vals, n->rate, i); | |
405 | fprintf(fp, "\n"); | |
406 | ||
407 | if (!show_errors) { | |
408 | fprintf(fp, "%-15s ", ""); | |
409 | format_pair(fp, vals, 4, 6); | |
410 | format_pair(fp, vals, 5, 7); | |
411 | format_rate(fp, vals, n->rate, 11); | |
412 | format_rate(fp, vals, n->rate, 9); | |
413 | fprintf(fp, "\n"); | |
414 | } else { | |
415 | fprintf(fp, "%-15s ", ""); | |
416 | format_rate(fp, vals, n->rate, 4); | |
417 | format_rate(fp, vals, n->rate, 6); | |
418 | format_rate(fp, vals, n->rate, 11); | |
419 | format_rate(fp, vals, n->rate, 10); | |
420 | fprintf(fp, "\n"); | |
421 | ||
422 | fprintf(fp, "%-15s ", ""); | |
423 | format_rate(fp, vals, n->rate, 12); | |
424 | format_rate(fp, vals, n->rate, 13); | |
425 | format_rate(fp, vals, n->rate, 14); | |
426 | format_rate(fp, vals, n->rate, 15); | |
427 | fprintf(fp, "\n"); | |
428 | ||
429 | fprintf(fp, "%-15s ", ""); | |
430 | format_rate(fp, vals, n->rate, 5); | |
431 | format_rate(fp, vals, n->rate, 7); | |
432 | format_rate(fp, vals, n->rate, 9); | |
433 | format_rate(fp, vals, n->rate, 17); | |
434 | fprintf(fp, "\n"); | |
435 | ||
436 | fprintf(fp, "%-15s ", ""); | |
437 | format_rate(fp, vals, n->rate, 16); | |
438 | format_rate(fp, vals, n->rate, 18); | |
439 | format_rate(fp, vals, n->rate, 19); | |
440 | format_rate(fp, vals, n->rate, 20); | |
441 | fprintf(fp, "\n"); | |
442 | } | |
443 | } | |
444 | ||
d1f28cf1 | 445 | static void dump_kern_db(FILE *fp) |
aba5acdf | 446 | { |
fcc16c22 | 447 | json_writer_t *jw = json_output ? jsonw_new(fp) : NULL; |
dc484542 | 448 | struct ifstat_ent *n; |
aba5acdf | 449 | |
fcc16c22 SH |
450 | if (jw) { |
451 | jsonw_pretty(jw, pretty); | |
452 | jsonw_name(jw, info_source); | |
453 | jsonw_start_object(jw); | |
454 | } else | |
ec3e625c | 455 | print_head(fp); |
aba5acdf SH |
456 | |
457 | for (n=kern_db; n; n=n->next) { | |
458 | if (!match(n->name)) | |
459 | continue; | |
ec3e625c | 460 | |
fcc16c22 SH |
461 | if (jw) |
462 | print_one_json(jw, n, n->val); | |
463 | else | |
ec3e625c | 464 | print_one_if(fp, n, n->val); |
aba5acdf | 465 | } |
ec3e625c SH |
466 | if (json_output) |
467 | fprintf(fp, "\n} }\n"); | |
aba5acdf SH |
468 | } |
469 | ||
d1f28cf1 | 470 | static void dump_incr_db(FILE *fp) |
aba5acdf SH |
471 | { |
472 | struct ifstat_ent *n, *h; | |
fcc16c22 | 473 | json_writer_t *jw = json_output ? jsonw_new(fp) : NULL; |
aba5acdf | 474 | |
ec3e625c | 475 | h = hist_db; |
fcc16c22 SH |
476 | if (jw) { |
477 | jsonw_pretty(jw, pretty); | |
478 | jsonw_name(jw, info_source); | |
479 | jsonw_start_object(jw); | |
480 | } else | |
ec3e625c | 481 | print_head(fp); |
aba5acdf SH |
482 | |
483 | for (n=kern_db; n; n=n->next) { | |
484 | int i; | |
485 | unsigned long long vals[MAXS]; | |
486 | struct ifstat_ent *h1; | |
487 | ||
488 | memcpy(vals, n->val, sizeof(vals)); | |
489 | ||
490 | for (h1 = h; h1; h1 = h1->next) { | |
491 | if (h1->ifindex == n->ifindex) { | |
492 | for (i = 0; i < MAXS; i++) | |
493 | vals[i] -= h1->val[i]; | |
494 | h = h1->next; | |
495 | break; | |
496 | } | |
497 | } | |
498 | if (!match(n->name)) | |
499 | continue; | |
ec3e625c | 500 | |
fcc16c22 SH |
501 | if (jw) |
502 | print_one_json(jw, n, n->val); | |
503 | else | |
ec3e625c | 504 | print_one_if(fp, n, vals); |
aba5acdf | 505 | } |
aba5acdf | 506 | |
fcc16c22 SH |
507 | if (jw) { |
508 | jsonw_end_object(jw); | |
509 | jsonw_destroy(&jw); | |
510 | } | |
511 | } | |
aba5acdf SH |
512 | |
513 | static int children; | |
514 | ||
d1f28cf1 | 515 | static void sigchild(int signo) |
aba5acdf SH |
516 | { |
517 | } | |
518 | ||
d1f28cf1 | 519 | static void update_db(int interval) |
aba5acdf SH |
520 | { |
521 | struct ifstat_ent *n, *h; | |
522 | ||
523 | n = kern_db; | |
524 | kern_db = NULL; | |
525 | ||
526 | load_info(); | |
527 | ||
528 | h = kern_db; | |
529 | kern_db = n; | |
530 | ||
531 | for (n = kern_db; n; n = n->next) { | |
532 | struct ifstat_ent *h1; | |
533 | for (h1 = h; h1; h1 = h1->next) { | |
534 | if (h1->ifindex == n->ifindex) { | |
535 | int i; | |
536 | for (i = 0; i < MAXS; i++) { | |
537 | if ((long)(h1->ival[i] - n->ival[i]) < 0) { | |
ae665a52 | 538 | memset(n->ival, 0, sizeof(n->ival)); |
aba5acdf SH |
539 | break; |
540 | } | |
541 | } | |
ae665a52 | 542 | for (i = 0; i < MAXS; i++) { |
aba5acdf SH |
543 | double sample; |
544 | unsigned long incr = h1->ival[i] - n->ival[i]; | |
545 | n->val[i] += incr; | |
546 | n->ival[i] = h1->ival[i]; | |
547 | sample = (double)(incr*1000)/interval; | |
548 | if (interval >= scan_interval) { | |
549 | n->rate[i] += W*(sample-n->rate[i]); | |
550 | } else if (interval >= 1000) { | |
551 | if (interval >= time_constant) { | |
552 | n->rate[i] = sample; | |
553 | } else { | |
554 | double w = W*(double)interval/scan_interval; | |
555 | n->rate[i] += w*(sample-n->rate[i]); | |
556 | } | |
557 | } | |
558 | } | |
559 | ||
560 | while (h != h1) { | |
561 | struct ifstat_ent *tmp = h; | |
562 | h = h->next; | |
563 | free(tmp->name); | |
564 | free(tmp); | |
565 | }; | |
566 | h = h1->next; | |
567 | free(h1->name); | |
568 | free(h1); | |
569 | break; | |
570 | } | |
571 | } | |
572 | } | |
573 | } | |
574 | ||
575 | #define T_DIFF(a,b) (((a).tv_sec-(b).tv_sec)*1000 + ((a).tv_usec-(b).tv_usec)/1000) | |
576 | ||
577 | ||
d1f28cf1 | 578 | static void server_loop(int fd) |
aba5acdf | 579 | { |
737f15f6 | 580 | struct timeval snaptime = { 0 }; |
aba5acdf SH |
581 | struct pollfd p; |
582 | p.fd = fd; | |
583 | p.events = p.revents = POLLIN; | |
584 | ||
585 | sprintf(info_source, "%d.%lu sampling_interval=%d time_const=%d", | |
586 | getpid(), (unsigned long)random(), scan_interval/1000, time_constant/1000); | |
587 | ||
588 | load_info(); | |
589 | ||
590 | for (;;) { | |
591 | int status; | |
592 | int tdiff; | |
593 | struct timeval now; | |
737f15f6 | 594 | |
aba5acdf SH |
595 | gettimeofday(&now, NULL); |
596 | tdiff = T_DIFF(now, snaptime); | |
597 | if (tdiff >= scan_interval) { | |
598 | update_db(tdiff); | |
599 | snaptime = now; | |
600 | tdiff = 0; | |
601 | } | |
737f15f6 | 602 | |
aba5acdf SH |
603 | if (poll(&p, 1, tdiff + scan_interval) > 0 |
604 | && (p.revents&POLLIN)) { | |
605 | int clnt = accept(fd, NULL, NULL); | |
606 | if (clnt >= 0) { | |
607 | pid_t pid; | |
608 | if (children >= 5) { | |
609 | close(clnt); | |
610 | } else if ((pid = fork()) != 0) { | |
611 | if (pid>0) | |
612 | children++; | |
613 | close(clnt); | |
614 | } else { | |
615 | FILE *fp = fdopen(clnt, "w"); | |
616 | if (fp) { | |
617 | if (tdiff > 0) | |
618 | update_db(tdiff); | |
619 | dump_raw_db(fp, 0); | |
620 | } | |
621 | exit(0); | |
622 | } | |
623 | } | |
624 | } | |
625 | while (children && waitpid(-1, &status, WNOHANG) > 0) | |
626 | children--; | |
627 | } | |
628 | } | |
629 | ||
d1f28cf1 | 630 | static int verify_forging(int fd) |
aba5acdf SH |
631 | { |
632 | struct ucred cred; | |
737f15f6 SH |
633 | socklen_t olen = sizeof(cred); |
634 | ||
aba5acdf SH |
635 | if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, (void*)&cred, &olen) || |
636 | olen < sizeof(cred)) | |
637 | return -1; | |
638 | if (cred.uid == getuid() || cred.uid == 0) | |
639 | return 0; | |
640 | return -1; | |
641 | } | |
642 | ||
d7e0809e SH |
643 | static void usage(void) __attribute__((noreturn)); |
644 | ||
aba5acdf SH |
645 | static void usage(void) |
646 | { | |
d7e0809e SH |
647 | fprintf(stderr, |
648 | "Usage: ifstat [OPTION] [ PATTERN [ PATTERN ] ]\n" | |
649 | " -h, --help this message\n" | |
650 | " -a, --ignore ignore history\n" | |
651 | " -d, --scan=SECS sample every statistics every SECS\n" | |
652 | " -e, --errors show errors\n" | |
ec3e625c | 653 | " -j, --json format output in JSON\n" |
d7e0809e | 654 | " -n, --nooutput do history only\n" |
fcc16c22 | 655 | " -p, --pretty pretty print\n" |
d7e0809e | 656 | " -r, --reset reset history\n" |
ec3e625c | 657 | " -s, --noupdate don\'t update history\n" |
d7e0809e SH |
658 | " -t, --interval=SECS report average over the last SECS\n" |
659 | " -V, --version output version information\n" | |
d7e0809e SH |
660 | " -z, --zeros show entries with zero activity\n"); |
661 | ||
662 | exit(-1); | |
aba5acdf SH |
663 | } |
664 | ||
9f3ea250 SH |
665 | static const struct option longopts[] = { |
666 | { "help", 0, 0, 'h' }, | |
667 | { "ignore", 0, 0, 'a' }, | |
668 | { "scan", 1, 0, 'd'}, | |
669 | { "errors", 0, 0, 'e' }, | |
670 | { "nooutput", 0, 0, 'n' }, | |
ec3e625c | 671 | { "json", 0, 0, 'j' }, |
9f3ea250 | 672 | { "reset", 0, 0, 'r' }, |
fcc16c22 | 673 | { "pretty", 0, 0, 'p' }, |
9f3ea250 SH |
674 | { "noupdate", 0, 0, 's' }, |
675 | { "interval", 1, 0, 't' }, | |
676 | { "version", 0, 0, 'V' }, | |
677 | { "zeros", 0, 0, 'z' }, | |
9f3ea250 SH |
678 | { 0 } |
679 | }; | |
aba5acdf SH |
680 | |
681 | int main(int argc, char *argv[]) | |
682 | { | |
683 | char hist_name[128]; | |
684 | struct sockaddr_un sun; | |
685 | FILE *hist_fp = NULL; | |
686 | int ch; | |
687 | int fd; | |
688 | ||
fcc16c22 | 689 | while ((ch = getopt_long(argc, argv, "hjpvVzrnasd:t:e", |
9f3ea250 | 690 | longopts, NULL)) != EOF) { |
aba5acdf SH |
691 | switch(ch) { |
692 | case 'z': | |
693 | dump_zeros = 1; | |
694 | break; | |
695 | case 'r': | |
696 | reset_history = 1; | |
697 | break; | |
698 | case 'a': | |
699 | ignore_history = 1; | |
700 | break; | |
701 | case 's': | |
702 | no_update = 1; | |
703 | break; | |
704 | case 'n': | |
705 | no_output = 1; | |
706 | break; | |
707 | case 'e': | |
708 | show_errors = 1; | |
709 | break; | |
ec3e625c SH |
710 | case 'j': |
711 | json_output = 1; | |
712 | break; | |
fcc16c22 SH |
713 | case 'p': |
714 | pretty = 1; | |
715 | break; | |
aba5acdf | 716 | case 'd': |
9f3ea250 SH |
717 | scan_interval = atoi(optarg) * 1000; |
718 | if (scan_interval <= 0) { | |
719 | fprintf(stderr, "ifstat: invalid scan interval\n"); | |
720 | exit(-1); | |
721 | } | |
aba5acdf SH |
722 | break; |
723 | case 't': | |
9f3ea250 SH |
724 | time_constant = atoi(optarg); |
725 | if (time_constant <= 0) { | |
aba5acdf SH |
726 | fprintf(stderr, "ifstat: invalid time constant divisor\n"); |
727 | exit(-1); | |
728 | } | |
729 | break; | |
730 | case 'v': | |
731 | case 'V': | |
732 | printf("ifstat utility, iproute2-ss%s\n", SNAPSHOT); | |
733 | exit(0); | |
734 | case 'h': | |
735 | case '?': | |
736 | default: | |
737 | usage(); | |
738 | } | |
739 | } | |
740 | ||
741 | argc -= optind; | |
742 | argv += optind; | |
743 | ||
744 | sun.sun_family = AF_UNIX; | |
745 | sun.sun_path[0] = 0; | |
746 | sprintf(sun.sun_path+1, "ifstat%d", getuid()); | |
747 | ||
748 | if (scan_interval > 0) { | |
749 | if (time_constant == 0) | |
750 | time_constant = 60; | |
751 | time_constant *= 1000; | |
752 | W = 1 - 1/exp(log(10)*(double)scan_interval/time_constant); | |
753 | if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) { | |
754 | perror("ifstat: socket"); | |
755 | exit(-1); | |
756 | } | |
757 | if (bind(fd, (struct sockaddr*)&sun, 2+1+strlen(sun.sun_path+1)) < 0) { | |
758 | perror("ifstat: bind"); | |
759 | exit(-1); | |
760 | } | |
761 | if (listen(fd, 5) < 0) { | |
762 | perror("ifstat: listen"); | |
763 | exit(-1); | |
764 | } | |
a7a9ddbb MF |
765 | if (daemon(0, 0)) { |
766 | perror("ifstat: daemon"); | |
767 | exit(-1); | |
768 | } | |
aba5acdf SH |
769 | signal(SIGPIPE, SIG_IGN); |
770 | signal(SIGCHLD, sigchild); | |
771 | server_loop(fd); | |
772 | exit(0); | |
773 | } | |
774 | ||
775 | patterns = argv; | |
776 | npatterns = argc; | |
777 | ||
778 | if (getenv("IFSTAT_HISTORY")) | |
daf7bd5c SH |
779 | snprintf(hist_name, sizeof(hist_name), |
780 | "%s", getenv("IFSTAT_HISTORY")); | |
aba5acdf | 781 | else |
daf7bd5c SH |
782 | snprintf(hist_name, sizeof(hist_name), |
783 | "%s/.ifstat.u%d", P_tmpdir, getuid()); | |
aba5acdf SH |
784 | |
785 | if (reset_history) | |
786 | unlink(hist_name); | |
787 | ||
788 | if (!ignore_history || !no_update) { | |
789 | struct stat stb; | |
790 | ||
791 | fd = open(hist_name, O_RDWR|O_CREAT|O_NOFOLLOW, 0600); | |
792 | if (fd < 0) { | |
793 | perror("ifstat: open history file"); | |
794 | exit(-1); | |
795 | } | |
796 | if ((hist_fp = fdopen(fd, "r+")) == NULL) { | |
797 | perror("ifstat: fdopen history file"); | |
798 | exit(-1); | |
799 | } | |
800 | if (flock(fileno(hist_fp), LOCK_EX)) { | |
801 | perror("ifstat: flock history file"); | |
802 | exit(-1); | |
803 | } | |
804 | if (fstat(fileno(hist_fp), &stb) != 0) { | |
805 | perror("ifstat: fstat history file"); | |
806 | exit(-1); | |
807 | } | |
808 | if (stb.st_nlink != 1 || stb.st_uid != getuid()) { | |
809 | fprintf(stderr, "ifstat: something is so wrong with history file, that I prefer not to proceed.\n"); | |
810 | exit(-1); | |
811 | } | |
812 | if (!ignore_history) { | |
813 | FILE *tfp; | |
9a230771 | 814 | long uptime = -1; |
aba5acdf SH |
815 | if ((tfp = fopen("/proc/uptime", "r")) != NULL) { |
816 | if (fscanf(tfp, "%ld", &uptime) != 1) | |
817 | uptime = -1; | |
818 | fclose(tfp); | |
819 | } | |
820 | if (uptime >= 0 && time(NULL) >= stb.st_mtime+uptime) { | |
821 | fprintf(stderr, "ifstat: history is aged out, resetting\n"); | |
822 | ftruncate(fileno(hist_fp), 0); | |
823 | } | |
824 | } | |
825 | ||
826 | load_raw_table(hist_fp); | |
827 | ||
828 | hist_db = kern_db; | |
829 | kern_db = NULL; | |
830 | } | |
831 | ||
832 | if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) >= 0 && | |
833 | (connect(fd, (struct sockaddr*)&sun, 2+1+strlen(sun.sun_path+1)) == 0 | |
834 | || (strcpy(sun.sun_path+1, "ifstat0"), | |
835 | connect(fd, (struct sockaddr*)&sun, 2+1+strlen(sun.sun_path+1)) == 0)) | |
836 | && verify_forging(fd) == 0) { | |
837 | FILE *sfp = fdopen(fd, "r"); | |
838 | load_raw_table(sfp); | |
839 | if (hist_db && source_mismatch) { | |
840 | fprintf(stderr, "ifstat: history is stale, ignoring it.\n"); | |
841 | hist_db = NULL; | |
842 | } | |
843 | fclose(sfp); | |
844 | } else { | |
845 | if (fd >= 0) | |
846 | close(fd); | |
847 | if (hist_db && info_source[0] && strcmp(info_source, "kernel")) { | |
848 | fprintf(stderr, "ifstat: history is stale, ignoring it.\n"); | |
849 | hist_db = NULL; | |
850 | info_source[0] = 0; | |
851 | } | |
852 | load_info(); | |
853 | if (info_source[0] == 0) | |
854 | strcpy(info_source, "kernel"); | |
855 | } | |
856 | ||
857 | if (!no_output) { | |
858 | if (ignore_history || hist_db == NULL) | |
859 | dump_kern_db(stdout); | |
860 | else | |
861 | dump_incr_db(stdout); | |
862 | } | |
ec3e625c | 863 | |
aba5acdf SH |
864 | if (!no_update) { |
865 | ftruncate(fileno(hist_fp), 0); | |
866 | rewind(hist_fp); | |
ec3e625c SH |
867 | |
868 | json_output = 0; | |
aba5acdf | 869 | dump_raw_db(hist_fp, 1); |
ec3e625c | 870 | fclose(hist_fp); |
aba5acdf SH |
871 | } |
872 | exit(0); | |
873 | } |