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