Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
a3baf649 SN |
2 | /* getdelays.c |
3 | * | |
4 | * Utility to get per-pid and per-tgid delay accounting statistics | |
5 | * Also illustrates usage of the taskstats interface | |
6 | * | |
7 | * Copyright (C) Shailabh Nagar, IBM Corp. 2005 | |
8 | * Copyright (C) Balbir Singh, IBM Corp. 2006 | |
9e06d3f9 | 9 | * Copyright (c) Jay Lan, SGI. 2006 |
a3baf649 | 10 | * |
d2f7bf13 AM |
11 | * Compile with |
12 | * gcc -I/usr/src/linux/include getdelays.c -o getdelays | |
a3baf649 SN |
13 | */ |
14 | ||
15 | #include <stdio.h> | |
16 | #include <stdlib.h> | |
17 | #include <errno.h> | |
18 | #include <unistd.h> | |
19 | #include <poll.h> | |
20 | #include <string.h> | |
21 | #include <fcntl.h> | |
22 | #include <sys/types.h> | |
23 | #include <sys/stat.h> | |
24 | #include <sys/socket.h> | |
db9e5679 | 25 | #include <sys/wait.h> |
a3baf649 SN |
26 | #include <signal.h> |
27 | ||
28 | #include <linux/genetlink.h> | |
29 | #include <linux/taskstats.h> | |
546040dc | 30 | #include <linux/cgroupstats.h> |
a3baf649 SN |
31 | |
32 | /* | |
33 | * Generic macros for dealing with netlink sockets. Might be duplicated | |
34 | * elsewhere. It is recommended that commercial grade applications use | |
35 | * libnl or libnetlink and use the interfaces provided by the library | |
36 | */ | |
37 | #define GENLMSG_DATA(glh) ((void *)(NLMSG_DATA(glh) + GENL_HDRLEN)) | |
38 | #define GENLMSG_PAYLOAD(glh) (NLMSG_PAYLOAD(glh, 0) - GENL_HDRLEN) | |
39 | #define NLA_DATA(na) ((void *)((char*)(na) + NLA_HDRLEN)) | |
40 | #define NLA_PAYLOAD(len) (len - NLA_HDRLEN) | |
41 | ||
d2f7bf13 AM |
42 | #define err(code, fmt, arg...) \ |
43 | do { \ | |
44 | fprintf(stderr, fmt, ##arg); \ | |
45 | exit(code); \ | |
46 | } while (0) | |
47 | ||
d2f7bf13 AM |
48 | int rcvbufsz; |
49 | char name[100]; | |
50 | int dbg; | |
51 | int print_delays; | |
cf709844 | 52 | int print_io_accounting; |
b663a79c | 53 | int print_task_context_switch_counts; |
d2f7bf13 | 54 | |
9e06d3f9 SN |
55 | #define PRINTF(fmt, arg...) { \ |
56 | if (dbg) { \ | |
57 | printf(fmt, ##arg); \ | |
58 | } \ | |
59 | } | |
60 | ||
61 | /* Maximum size of response requested or message sent */ | |
88040230 | 62 | #define MAX_MSG_SIZE 1024 |
9e06d3f9 SN |
63 | /* Maximum number of cpus expected to be specified in a cpumask */ |
64 | #define MAX_CPUS 32 | |
9e06d3f9 SN |
65 | |
66 | struct msgtemplate { | |
67 | struct nlmsghdr n; | |
68 | struct genlmsghdr g; | |
69 | char buf[MAX_MSG_SIZE]; | |
70 | }; | |
71 | ||
72 | char cpumask[100+6*MAX_CPUS]; | |
a3baf649 | 73 | |
f16825bb RD |
74 | static void usage(void) |
75 | { | |
76 | fprintf(stderr, "getdelays [-dilv] [-w logfile] [-r bufsize] " | |
77 | "[-m cpumask] [-t tgid] [-p pid]\n"); | |
78 | fprintf(stderr, " -d: print delayacct stats\n"); | |
79 | fprintf(stderr, " -i: print IO accounting (works only with -p)\n"); | |
80 | fprintf(stderr, " -l: listen forever\n"); | |
81 | fprintf(stderr, " -v: debug on\n"); | |
546040dc | 82 | fprintf(stderr, " -C: container path\n"); |
f16825bb RD |
83 | } |
84 | ||
a3baf649 SN |
85 | /* |
86 | * Create a raw netlink socket and bind | |
87 | */ | |
9e06d3f9 | 88 | static int create_nl_socket(int protocol) |
a3baf649 | 89 | { |
9e06d3f9 SN |
90 | int fd; |
91 | struct sockaddr_nl local; | |
92 | ||
93 | fd = socket(AF_NETLINK, SOCK_RAW, protocol); | |
94 | if (fd < 0) | |
95 | return -1; | |
96 | ||
97 | if (rcvbufsz) | |
98 | if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, | |
99 | &rcvbufsz, sizeof(rcvbufsz)) < 0) { | |
0de4b954 | 100 | fprintf(stderr, "Unable to set socket rcv buf size to %d\n", |
d2f7bf13 | 101 | rcvbufsz); |
0de4b954 | 102 | goto error; |
9e06d3f9 | 103 | } |
a3baf649 | 104 | |
9e06d3f9 SN |
105 | memset(&local, 0, sizeof(local)); |
106 | local.nl_family = AF_NETLINK; | |
a3baf649 | 107 | |
9e06d3f9 SN |
108 | if (bind(fd, (struct sockaddr *) &local, sizeof(local)) < 0) |
109 | goto error; | |
a3baf649 | 110 | |
9e06d3f9 SN |
111 | return fd; |
112 | error: | |
113 | close(fd); | |
114 | return -1; | |
a3baf649 SN |
115 | } |
116 | ||
9e06d3f9 | 117 | |
b7ed698c | 118 | static int send_cmd(int sd, __u16 nlmsg_type, __u32 nlmsg_pid, |
9e06d3f9 SN |
119 | __u8 genl_cmd, __u16 nla_type, |
120 | void *nla_data, int nla_len) | |
a3baf649 | 121 | { |
9e06d3f9 SN |
122 | struct nlattr *na; |
123 | struct sockaddr_nl nladdr; | |
124 | int r, buflen; | |
125 | char *buf; | |
126 | ||
127 | struct msgtemplate msg; | |
128 | ||
129 | msg.n.nlmsg_len = NLMSG_LENGTH(GENL_HDRLEN); | |
130 | msg.n.nlmsg_type = nlmsg_type; | |
131 | msg.n.nlmsg_flags = NLM_F_REQUEST; | |
132 | msg.n.nlmsg_seq = 0; | |
133 | msg.n.nlmsg_pid = nlmsg_pid; | |
134 | msg.g.cmd = genl_cmd; | |
135 | msg.g.version = 0x1; | |
136 | na = (struct nlattr *) GENLMSG_DATA(&msg); | |
137 | na->nla_type = nla_type; | |
4054ab64 | 138 | na->nla_len = nla_len + NLA_HDRLEN; |
9e06d3f9 SN |
139 | memcpy(NLA_DATA(na), nla_data, nla_len); |
140 | msg.n.nlmsg_len += NLMSG_ALIGN(na->nla_len); | |
141 | ||
142 | buf = (char *) &msg; | |
143 | buflen = msg.n.nlmsg_len ; | |
144 | memset(&nladdr, 0, sizeof(nladdr)); | |
145 | nladdr.nl_family = AF_NETLINK; | |
146 | while ((r = sendto(sd, buf, buflen, 0, (struct sockaddr *) &nladdr, | |
147 | sizeof(nladdr))) < buflen) { | |
148 | if (r > 0) { | |
149 | buf += r; | |
150 | buflen -= r; | |
151 | } else if (errno != EAGAIN) | |
152 | return -1; | |
153 | } | |
154 | return 0; | |
a3baf649 SN |
155 | } |
156 | ||
9e06d3f9 | 157 | |
a3baf649 SN |
158 | /* |
159 | * Probe the controller in genetlink to find the family id | |
160 | * for the TASKSTATS family | |
161 | */ | |
b7ed698c | 162 | static int get_family_id(int sd) |
a3baf649 | 163 | { |
9e06d3f9 SN |
164 | struct { |
165 | struct nlmsghdr n; | |
166 | struct genlmsghdr g; | |
167 | char buf[256]; | |
168 | } ans; | |
169 | ||
10e6f32b | 170 | int id = 0, rc; |
9e06d3f9 SN |
171 | struct nlattr *na; |
172 | int rep_len; | |
173 | ||
174 | strcpy(name, TASKSTATS_GENL_NAME); | |
175 | rc = send_cmd(sd, GENL_ID_CTRL, getpid(), CTRL_CMD_GETFAMILY, | |
176 | CTRL_ATTR_FAMILY_NAME, (void *)name, | |
177 | strlen(TASKSTATS_GENL_NAME)+1); | |
4ed960b1 AM |
178 | if (rc < 0) |
179 | return 0; /* sendto() failure? */ | |
9e06d3f9 SN |
180 | |
181 | rep_len = recv(sd, &ans, sizeof(ans), 0); | |
182 | if (ans.n.nlmsg_type == NLMSG_ERROR || | |
183 | (rep_len < 0) || !NLMSG_OK((&ans.n), rep_len)) | |
184 | return 0; | |
a3baf649 | 185 | |
9e06d3f9 SN |
186 | na = (struct nlattr *) GENLMSG_DATA(&ans); |
187 | na = (struct nlattr *) ((char *) na + NLA_ALIGN(na->nla_len)); | |
188 | if (na->nla_type == CTRL_ATTR_FAMILY_ID) { | |
189 | id = *(__u16 *) NLA_DATA(na); | |
190 | } | |
191 | return id; | |
a3baf649 SN |
192 | } |
193 | ||
02d54f09 WF |
194 | #define average_ms(t, c) (t / 1000000ULL / (c ? c : 1)) |
195 | ||
b7ed698c | 196 | static void print_delayacct(struct taskstats *t) |
a3baf649 | 197 | { |
02d54f09 WF |
198 | printf("\n\nCPU %15s%15s%15s%15s%15s\n" |
199 | " %15llu%15llu%15llu%15llu%15.3fms\n" | |
200 | "IO %15s%15s%15s\n" | |
a3b2aeac | 201 | " %15llu%15llu%15.3fms\n" |
02d54f09 | 202 | "SWAP %15s%15s%15s\n" |
a3b2aeac | 203 | " %15llu%15llu%15.3fms\n" |
02d54f09 | 204 | "RECLAIM %12s%15s%15s\n" |
a3b2aeac | 205 | " %15llu%15llu%15.3fms\n" |
b1d29ba8 | 206 | "THRASHING%12s%15s%15s\n" |
a3b2aeac | 207 | " %15llu%15llu%15.3fms\n" |
5bf18281 | 208 | "COMPACT %12s%15s%15s\n" |
a3b2aeac | 209 | " %15llu%15llu%15.3fms\n" |
662ce1dc | 210 | "WPCOPY %12s%15s%15s\n" |
a3b2aeac YY |
211 | " %15llu%15llu%15.3fms\n" |
212 | "IRQ %15s%15s%15s\n" | |
213 | " %15llu%15llu%15.3fms\n", | |
02d54f09 WF |
214 | "count", "real total", "virtual total", |
215 | "delay total", "delay average", | |
66659313 RD |
216 | (unsigned long long)t->cpu_count, |
217 | (unsigned long long)t->cpu_run_real_total, | |
218 | (unsigned long long)t->cpu_run_virtual_total, | |
219 | (unsigned long long)t->cpu_delay_total, | |
02d54f09 WF |
220 | average_ms((double)t->cpu_delay_total, t->cpu_count), |
221 | "count", "delay total", "delay average", | |
66659313 RD |
222 | (unsigned long long)t->blkio_count, |
223 | (unsigned long long)t->blkio_delay_total, | |
a3b2aeac | 224 | average_ms((double)t->blkio_delay_total, t->blkio_count), |
02d54f09 | 225 | "count", "delay total", "delay average", |
66659313 RD |
226 | (unsigned long long)t->swapin_count, |
227 | (unsigned long long)t->swapin_delay_total, | |
a3b2aeac | 228 | average_ms((double)t->swapin_delay_total, t->swapin_count), |
02d54f09 | 229 | "count", "delay total", "delay average", |
66659313 | 230 | (unsigned long long)t->freepages_count, |
02d54f09 | 231 | (unsigned long long)t->freepages_delay_total, |
a3b2aeac | 232 | average_ms((double)t->freepages_delay_total, t->freepages_count), |
b1d29ba8 JW |
233 | "count", "delay total", "delay average", |
234 | (unsigned long long)t->thrashing_count, | |
235 | (unsigned long long)t->thrashing_delay_total, | |
a3b2aeac | 236 | average_ms((double)t->thrashing_delay_total, t->thrashing_count), |
5bf18281 | 237 | "count", "delay total", "delay average", |
238 | (unsigned long long)t->compact_count, | |
239 | (unsigned long long)t->compact_delay_total, | |
a3b2aeac | 240 | average_ms((double)t->compact_delay_total, t->compact_count), |
662ce1dc YY |
241 | "count", "delay total", "delay average", |
242 | (unsigned long long)t->wpcopy_count, | |
243 | (unsigned long long)t->wpcopy_delay_total, | |
a3b2aeac YY |
244 | average_ms((double)t->wpcopy_delay_total, t->wpcopy_count), |
245 | "count", "delay total", "delay average", | |
246 | (unsigned long long)t->irq_count, | |
247 | (unsigned long long)t->irq_delay_total, | |
248 | average_ms((double)t->irq_delay_total, t->irq_count)); | |
a3baf649 SN |
249 | } |
250 | ||
b7ed698c | 251 | static void task_context_switch_counts(struct taskstats *t) |
b663a79c MU |
252 | { |
253 | printf("\n\nTask %15s%15s\n" | |
10e6f32b | 254 | " %15llu%15llu\n", |
b663a79c | 255 | "voluntary", "nonvoluntary", |
66659313 | 256 | (unsigned long long)t->nvcsw, (unsigned long long)t->nivcsw); |
b663a79c MU |
257 | } |
258 | ||
b7ed698c | 259 | static void print_cgroupstats(struct cgroupstats *c) |
546040dc BS |
260 | { |
261 | printf("sleeping %llu, blocked %llu, running %llu, stopped %llu, " | |
66659313 RD |
262 | "uninterruptible %llu\n", (unsigned long long)c->nr_sleeping, |
263 | (unsigned long long)c->nr_io_wait, | |
264 | (unsigned long long)c->nr_running, | |
265 | (unsigned long long)c->nr_stopped, | |
266 | (unsigned long long)c->nr_uninterruptible); | |
546040dc BS |
267 | } |
268 | ||
269 | ||
b7ed698c | 270 | static void print_ioacct(struct taskstats *t) |
cf709844 AM |
271 | { |
272 | printf("%s: read=%llu, write=%llu, cancelled_write=%llu\n", | |
273 | t->ac_comm, | |
274 | (unsigned long long)t->read_bytes, | |
275 | (unsigned long long)t->write_bytes, | |
276 | (unsigned long long)t->cancelled_write_bytes); | |
277 | } | |
278 | ||
a3baf649 SN |
279 | int main(int argc, char *argv[]) |
280 | { | |
b8d9a865 JSR |
281 | int c, rc, rep_len, aggr_len, len2; |
282 | int cmd_type = TASKSTATS_CMD_ATTR_UNSPEC; | |
9e06d3f9 SN |
283 | __u16 id; |
284 | __u32 mypid; | |
285 | ||
286 | struct nlattr *na; | |
287 | int nl_sd = -1; | |
288 | int len = 0; | |
289 | pid_t tid = 0; | |
290 | pid_t rtid = 0; | |
291 | ||
292 | int fd = 0; | |
9e06d3f9 SN |
293 | int write_file = 0; |
294 | int maskset = 0; | |
7f76c403 | 295 | char *logfile = NULL; |
9e06d3f9 | 296 | int loop = 0; |
546040dc | 297 | int containerset = 0; |
8da01af4 | 298 | char *containerpath = NULL; |
546040dc | 299 | int cfd = 0; |
db9e5679 MG |
300 | int forking = 0; |
301 | sigset_t sigset; | |
9e06d3f9 SN |
302 | |
303 | struct msgtemplate msg; | |
304 | ||
db9e5679 MG |
305 | while (!forking) { |
306 | c = getopt(argc, argv, "qdiw:r:m:t:p:vlC:c:"); | |
9e06d3f9 SN |
307 | if (c < 0) |
308 | break; | |
a3baf649 | 309 | |
9e06d3f9 SN |
310 | switch (c) { |
311 | case 'd': | |
312 | printf("print delayacct stats ON\n"); | |
313 | print_delays = 1; | |
314 | break; | |
cf709844 AM |
315 | case 'i': |
316 | printf("printing IO accounting\n"); | |
317 | print_io_accounting = 1; | |
318 | break; | |
b663a79c MU |
319 | case 'q': |
320 | printf("printing task/process context switch rates\n"); | |
321 | print_task_context_switch_counts = 1; | |
322 | break; | |
546040dc BS |
323 | case 'C': |
324 | containerset = 1; | |
8da01af4 | 325 | containerpath = optarg; |
546040dc | 326 | break; |
9e06d3f9 | 327 | case 'w': |
7f76c403 | 328 | logfile = strdup(optarg); |
9e06d3f9 SN |
329 | printf("write to file %s\n", logfile); |
330 | write_file = 1; | |
331 | break; | |
332 | case 'r': | |
333 | rcvbufsz = atoi(optarg); | |
334 | printf("receive buf size %d\n", rcvbufsz); | |
335 | if (rcvbufsz < 0) | |
336 | err(1, "Invalid rcv buf size\n"); | |
337 | break; | |
338 | case 'm': | |
339 | strncpy(cpumask, optarg, sizeof(cpumask)); | |
88e15ce4 | 340 | cpumask[sizeof(cpumask) - 1] = '\0'; |
9e06d3f9 SN |
341 | maskset = 1; |
342 | printf("cpumask %s maskset %d\n", cpumask, maskset); | |
343 | break; | |
344 | case 't': | |
345 | tid = atoi(optarg); | |
346 | if (!tid) | |
347 | err(1, "Invalid tgid\n"); | |
348 | cmd_type = TASKSTATS_CMD_ATTR_TGID; | |
9e06d3f9 SN |
349 | break; |
350 | case 'p': | |
351 | tid = atoi(optarg); | |
352 | if (!tid) | |
353 | err(1, "Invalid pid\n"); | |
354 | cmd_type = TASKSTATS_CMD_ATTR_PID; | |
9e06d3f9 | 355 | break; |
db9e5679 MG |
356 | case 'c': |
357 | ||
358 | /* Block SIGCHLD for sigwait() later */ | |
359 | if (sigemptyset(&sigset) == -1) | |
360 | err(1, "Failed to empty sigset"); | |
361 | if (sigaddset(&sigset, SIGCHLD)) | |
362 | err(1, "Failed to set sigchld in sigset"); | |
363 | sigprocmask(SIG_BLOCK, &sigset, NULL); | |
364 | ||
365 | /* fork/exec a child */ | |
366 | tid = fork(); | |
367 | if (tid < 0) | |
368 | err(1, "Fork failed\n"); | |
369 | if (tid == 0) | |
370 | if (execvp(argv[optind - 1], | |
371 | &argv[optind - 1]) < 0) | |
372 | exit(-1); | |
373 | ||
374 | /* Set the command type and avoid further processing */ | |
375 | cmd_type = TASKSTATS_CMD_ATTR_PID; | |
376 | forking = 1; | |
377 | break; | |
9e06d3f9 SN |
378 | case 'v': |
379 | printf("debug on\n"); | |
380 | dbg = 1; | |
381 | break; | |
382 | case 'l': | |
383 | printf("listen forever\n"); | |
384 | loop = 1; | |
385 | break; | |
386 | default: | |
f16825bb | 387 | usage(); |
9e06d3f9 | 388 | exit(-1); |
a3baf649 | 389 | } |
a3baf649 | 390 | } |
a3baf649 | 391 | |
9e06d3f9 SN |
392 | if (write_file) { |
393 | fd = open(logfile, O_WRONLY | O_CREAT | O_TRUNC, | |
394 | S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH); | |
395 | if (fd == -1) { | |
396 | perror("Cannot open output file\n"); | |
397 | exit(1); | |
398 | } | |
399 | } | |
a3baf649 | 400 | |
563c17cb ME |
401 | nl_sd = create_nl_socket(NETLINK_GENERIC); |
402 | if (nl_sd < 0) | |
9e06d3f9 | 403 | err(1, "error creating Netlink socket\n"); |
a3baf649 | 404 | |
a3baf649 | 405 | |
9e06d3f9 SN |
406 | mypid = getpid(); |
407 | id = get_family_id(nl_sd); | |
408 | if (!id) { | |
d2f7bf13 | 409 | fprintf(stderr, "Error getting family id, errno %d\n", errno); |
9e06d3f9 | 410 | goto err; |
a3baf649 | 411 | } |
9e06d3f9 SN |
412 | PRINTF("family id %d\n", id); |
413 | ||
414 | if (maskset) { | |
415 | rc = send_cmd(nl_sd, id, mypid, TASKSTATS_CMD_GET, | |
416 | TASKSTATS_CMD_ATTR_REGISTER_CPUMASK, | |
7d1bdca9 | 417 | &cpumask, strlen(cpumask) + 1); |
9e06d3f9 SN |
418 | PRINTF("Sent register cpumask, retval %d\n", rc); |
419 | if (rc < 0) { | |
d2f7bf13 | 420 | fprintf(stderr, "error sending register cpumask\n"); |
9e06d3f9 SN |
421 | goto err; |
422 | } | |
a3baf649 SN |
423 | } |
424 | ||
546040dc BS |
425 | if (tid && containerset) { |
426 | fprintf(stderr, "Select either -t or -C, not both\n"); | |
427 | goto err; | |
428 | } | |
429 | ||
db9e5679 MG |
430 | /* |
431 | * If we forked a child, wait for it to exit. Cannot use waitpid() | |
432 | * as all the delicious data would be reaped as part of the wait | |
433 | */ | |
434 | if (tid && forking) { | |
435 | int sig_received; | |
436 | sigwait(&sigset, &sig_received); | |
437 | } | |
438 | ||
9e06d3f9 SN |
439 | if (tid) { |
440 | rc = send_cmd(nl_sd, id, mypid, TASKSTATS_CMD_GET, | |
441 | cmd_type, &tid, sizeof(__u32)); | |
442 | PRINTF("Sent pid/tgid, retval %d\n", rc); | |
443 | if (rc < 0) { | |
d2f7bf13 | 444 | fprintf(stderr, "error sending tid/tgid cmd\n"); |
9e06d3f9 SN |
445 | goto done; |
446 | } | |
a3baf649 SN |
447 | } |
448 | ||
546040dc BS |
449 | if (containerset) { |
450 | cfd = open(containerpath, O_RDONLY); | |
451 | if (cfd < 0) { | |
452 | perror("error opening container file"); | |
453 | goto err; | |
454 | } | |
455 | rc = send_cmd(nl_sd, id, mypid, CGROUPSTATS_CMD_GET, | |
456 | CGROUPSTATS_CMD_ATTR_FD, &cfd, sizeof(__u32)); | |
457 | if (rc < 0) { | |
458 | perror("error sending cgroupstats command"); | |
459 | goto err; | |
460 | } | |
461 | } | |
65a67bd2 MM |
462 | if (!maskset && !tid && !containerset) { |
463 | usage(); | |
464 | goto err; | |
465 | } | |
546040dc | 466 | |
9e06d3f9 | 467 | do { |
9e06d3f9 SN |
468 | rep_len = recv(nl_sd, &msg, sizeof(msg), 0); |
469 | PRINTF("received %d bytes\n", rep_len); | |
a3baf649 | 470 | |
9e06d3f9 | 471 | if (rep_len < 0) { |
d2f7bf13 AM |
472 | fprintf(stderr, "nonfatal reply error: errno %d\n", |
473 | errno); | |
9e06d3f9 SN |
474 | continue; |
475 | } | |
476 | if (msg.n.nlmsg_type == NLMSG_ERROR || | |
477 | !NLMSG_OK((&msg.n), rep_len)) { | |
7d1bdca9 | 478 | struct nlmsgerr *err = NLMSG_DATA(&msg); |
d2f7bf13 AM |
479 | fprintf(stderr, "fatal reply error, errno %d\n", |
480 | err->error); | |
9e06d3f9 SN |
481 | goto done; |
482 | } | |
483 | ||
10e6f32b | 484 | PRINTF("nlmsghdr size=%zu, nlmsg_len=%d, rep_len=%d\n", |
9e06d3f9 SN |
485 | sizeof(struct nlmsghdr), msg.n.nlmsg_len, rep_len); |
486 | ||
487 | ||
488 | rep_len = GENLMSG_PAYLOAD(&msg.n); | |
489 | ||
490 | na = (struct nlattr *) GENLMSG_DATA(&msg); | |
491 | len = 0; | |
9e06d3f9 SN |
492 | while (len < rep_len) { |
493 | len += NLA_ALIGN(na->nla_len); | |
494 | switch (na->nla_type) { | |
495 | case TASKSTATS_TYPE_AGGR_TGID: | |
496 | /* Fall through */ | |
497 | case TASKSTATS_TYPE_AGGR_PID: | |
498 | aggr_len = NLA_PAYLOAD(na->nla_len); | |
499 | len2 = 0; | |
500 | /* For nested attributes, na follows */ | |
501 | na = (struct nlattr *) NLA_DATA(na); | |
9e06d3f9 SN |
502 | while (len2 < aggr_len) { |
503 | switch (na->nla_type) { | |
504 | case TASKSTATS_TYPE_PID: | |
505 | rtid = *(int *) NLA_DATA(na); | |
506 | if (print_delays) | |
507 | printf("PID\t%d\n", rtid); | |
508 | break; | |
509 | case TASKSTATS_TYPE_TGID: | |
510 | rtid = *(int *) NLA_DATA(na); | |
511 | if (print_delays) | |
512 | printf("TGID\t%d\n", rtid); | |
513 | break; | |
514 | case TASKSTATS_TYPE_STATS: | |
9e06d3f9 SN |
515 | if (print_delays) |
516 | print_delayacct((struct taskstats *) NLA_DATA(na)); | |
cf709844 AM |
517 | if (print_io_accounting) |
518 | print_ioacct((struct taskstats *) NLA_DATA(na)); | |
b663a79c MU |
519 | if (print_task_context_switch_counts) |
520 | task_context_switch_counts((struct taskstats *) NLA_DATA(na)); | |
9e06d3f9 SN |
521 | if (fd) { |
522 | if (write(fd, NLA_DATA(na), na->nla_len) < 0) { | |
523 | err(1,"write error\n"); | |
524 | } | |
525 | } | |
526 | if (!loop) | |
527 | goto done; | |
528 | break; | |
570d8e93 ND |
529 | case TASKSTATS_TYPE_NULL: |
530 | break; | |
9e06d3f9 | 531 | default: |
d2f7bf13 AM |
532 | fprintf(stderr, "Unknown nested" |
533 | " nla_type %d\n", | |
534 | na->nla_type); | |
9e06d3f9 SN |
535 | break; |
536 | } | |
537 | len2 += NLA_ALIGN(na->nla_len); | |
570d8e93 ND |
538 | na = (struct nlattr *)((char *)na + |
539 | NLA_ALIGN(na->nla_len)); | |
9e06d3f9 SN |
540 | } |
541 | break; | |
542 | ||
546040dc BS |
543 | case CGROUPSTATS_TYPE_CGROUP_STATS: |
544 | print_cgroupstats(NLA_DATA(na)); | |
545 | break; | |
9e06d3f9 | 546 | default: |
d2f7bf13 AM |
547 | fprintf(stderr, "Unknown nla_type %d\n", |
548 | na->nla_type); | |
4be2c95d | 549 | case TASKSTATS_TYPE_NULL: |
9e06d3f9 | 550 | break; |
a3baf649 | 551 | } |
9e06d3f9 | 552 | na = (struct nlattr *) (GENLMSG_DATA(&msg) + len); |
a3baf649 | 553 | } |
9e06d3f9 SN |
554 | } while (loop); |
555 | done: | |
556 | if (maskset) { | |
557 | rc = send_cmd(nl_sd, id, mypid, TASKSTATS_CMD_GET, | |
558 | TASKSTATS_CMD_ATTR_DEREGISTER_CPUMASK, | |
7d1bdca9 | 559 | &cpumask, strlen(cpumask) + 1); |
9e06d3f9 SN |
560 | printf("Sent deregister mask, retval %d\n", rc); |
561 | if (rc < 0) | |
562 | err(rc, "error sending deregister cpumask\n"); | |
a3baf649 | 563 | } |
9e06d3f9 SN |
564 | err: |
565 | close(nl_sd); | |
566 | if (fd) | |
567 | close(fd); | |
546040dc BS |
568 | if (cfd) |
569 | close(cfd); | |
9e06d3f9 | 570 | return 0; |
a3baf649 | 571 | } |