Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/fs/proc/array.c | |
3 | * | |
4 | * Copyright (C) 1992 by Linus Torvalds | |
5 | * based on ideas by Darren Senn | |
6 | * | |
7 | * Fixes: | |
8 | * Michael. K. Johnson: stat,statm extensions. | |
9 | * <johnsonm@stolaf.edu> | |
10 | * | |
11 | * Pauline Middelink : Made cmdline,envline only break at '\0's, to | |
12 | * make sure SET_PROCTITLE works. Also removed | |
13 | * bad '!' which forced address recalculation for | |
14 | * EVERY character on the current page. | |
15 | * <middelin@polyware.iaf.nl> | |
16 | * | |
17 | * Danny ter Haar : added cpuinfo | |
18 | * <dth@cistron.nl> | |
19 | * | |
20 | * Alessandro Rubini : profile extension. | |
21 | * <rubini@ipvvis.unipv.it> | |
22 | * | |
23 | * Jeff Tranter : added BogoMips field to cpuinfo | |
24 | * <Jeff_Tranter@Mitel.COM> | |
25 | * | |
26 | * Bruno Haible : remove 4K limit for the maps file | |
27 | * <haible@ma2s2.mathematik.uni-karlsruhe.de> | |
28 | * | |
29 | * Yves Arrouye : remove removal of trailing spaces in get_array. | |
30 | * <Yves.Arrouye@marin.fdn.fr> | |
31 | * | |
32 | * Jerome Forissier : added per-CPU time information to /proc/stat | |
33 | * and /proc/<pid>/cpu extension | |
34 | * <forissier@isia.cma.fr> | |
35 | * - Incorporation and non-SMP safe operation | |
36 | * of forissier patch in 2.1.78 by | |
37 | * Hans Marcus <crowbar@concepts.nl> | |
38 | * | |
39 | * aeb@cwi.nl : /proc/partitions | |
40 | * | |
41 | * | |
42 | * Alan Cox : security fixes. | |
43 | * <Alan.Cox@linux.org> | |
44 | * | |
45 | * Al Viro : safe handling of mm_struct | |
46 | * | |
47 | * Gerhard Wichert : added BIGMEM support | |
48 | * Siemens AG <Gerhard.Wichert@pdb.siemens.de> | |
49 | * | |
50 | * Al Viro & Jeff Garzik : moved most of the thing into base.c and | |
51 | * : proc_misc.c. The rest may eventually go into | |
52 | * : base.c too. | |
53 | */ | |
54 | ||
1da177e4 LT |
55 | #include <linux/types.h> |
56 | #include <linux/errno.h> | |
57 | #include <linux/time.h> | |
58 | #include <linux/kernel.h> | |
59 | #include <linux/kernel_stat.h> | |
60 | #include <linux/tty.h> | |
61 | #include <linux/string.h> | |
62 | #include <linux/mman.h> | |
63 | #include <linux/proc_fs.h> | |
64 | #include <linux/ioport.h> | |
65 | #include <linux/mm.h> | |
66 | #include <linux/hugetlb.h> | |
67 | #include <linux/pagemap.h> | |
68 | #include <linux/swap.h> | |
69 | #include <linux/slab.h> | |
70 | #include <linux/smp.h> | |
71 | #include <linux/signal.h> | |
72 | #include <linux/highmem.h> | |
73 | #include <linux/file.h> | |
74 | #include <linux/times.h> | |
75 | #include <linux/cpuset.h> | |
4fb3a538 | 76 | #include <linux/rcupdate.h> |
25890454 | 77 | #include <linux/delayacct.h> |
1da177e4 LT |
78 | |
79 | #include <asm/uaccess.h> | |
80 | #include <asm/pgtable.h> | |
81 | #include <asm/io.h> | |
82 | #include <asm/processor.h> | |
83 | #include "internal.h" | |
84 | ||
85 | /* Gcc optimizes away "strlen(x)" for constant x */ | |
86 | #define ADDBUF(buffer, string) \ | |
87 | do { memcpy(buffer, string, strlen(string)); \ | |
88 | buffer += strlen(string); } while (0) | |
89 | ||
90 | static inline char * task_name(struct task_struct *p, char * buf) | |
91 | { | |
92 | int i; | |
93 | char * name; | |
94 | char tcomm[sizeof(p->comm)]; | |
95 | ||
96 | get_task_comm(tcomm, p); | |
97 | ||
98 | ADDBUF(buf, "Name:\t"); | |
99 | name = tcomm; | |
100 | i = sizeof(tcomm); | |
101 | do { | |
102 | unsigned char c = *name; | |
103 | name++; | |
104 | i--; | |
105 | *buf = c; | |
106 | if (!c) | |
107 | break; | |
108 | if (c == '\\') { | |
109 | buf[1] = c; | |
110 | buf += 2; | |
111 | continue; | |
112 | } | |
113 | if (c == '\n') { | |
114 | buf[0] = '\\'; | |
115 | buf[1] = 'n'; | |
116 | buf += 2; | |
117 | continue; | |
118 | } | |
119 | buf++; | |
120 | } while (i); | |
121 | *buf = '\n'; | |
122 | return buf+1; | |
123 | } | |
124 | ||
125 | /* | |
126 | * The task state array is a strange "bitmap" of | |
127 | * reasons to sleep. Thus "running" is zero, and | |
128 | * you can test for combinations of others with | |
129 | * simple bit tests. | |
130 | */ | |
131 | static const char *task_state_array[] = { | |
132 | "R (running)", /* 0 */ | |
133 | "S (sleeping)", /* 1 */ | |
134 | "D (disk sleep)", /* 2 */ | |
135 | "T (stopped)", /* 4 */ | |
136 | "T (tracing stop)", /* 8 */ | |
137 | "Z (zombie)", /* 16 */ | |
138 | "X (dead)" /* 32 */ | |
139 | }; | |
140 | ||
141 | static inline const char * get_task_state(struct task_struct *tsk) | |
142 | { | |
143 | unsigned int state = (tsk->state & (TASK_RUNNING | | |
144 | TASK_INTERRUPTIBLE | | |
145 | TASK_UNINTERRUPTIBLE | | |
146 | TASK_STOPPED | | |
147 | TASK_TRACED)) | | |
148 | (tsk->exit_state & (EXIT_ZOMBIE | | |
149 | EXIT_DEAD)); | |
150 | const char **p = &task_state_array[0]; | |
151 | ||
152 | while (state) { | |
153 | p++; | |
154 | state >>= 1; | |
155 | } | |
156 | return *p; | |
157 | } | |
158 | ||
159 | static inline char * task_state(struct task_struct *p, char *buffer) | |
160 | { | |
161 | struct group_info *group_info; | |
162 | int g; | |
badf1662 | 163 | struct fdtable *fdt = NULL; |
1da177e4 | 164 | |
b0fa9db6 | 165 | rcu_read_lock(); |
1da177e4 LT |
166 | buffer += sprintf(buffer, |
167 | "State:\t%s\n" | |
1da177e4 LT |
168 | "Tgid:\t%d\n" |
169 | "Pid:\t%d\n" | |
170 | "PPid:\t%d\n" | |
171 | "TracerPid:\t%d\n" | |
172 | "Uid:\t%d\t%d\t%d\t%d\n" | |
173 | "Gid:\t%d\t%d\t%d\t%d\n", | |
174 | get_task_state(p), | |
b0fa9db6 ON |
175 | p->tgid, p->pid, |
176 | pid_alive(p) ? rcu_dereference(p->real_parent)->tgid : 0, | |
177 | pid_alive(p) && p->ptrace ? rcu_dereference(p->parent)->pid : 0, | |
1da177e4 LT |
178 | p->uid, p->euid, p->suid, p->fsuid, |
179 | p->gid, p->egid, p->sgid, p->fsgid); | |
b0fa9db6 | 180 | |
1da177e4 | 181 | task_lock(p); |
badf1662 DS |
182 | if (p->files) |
183 | fdt = files_fdtable(p->files); | |
1da177e4 LT |
184 | buffer += sprintf(buffer, |
185 | "FDSize:\t%d\n" | |
186 | "Groups:\t", | |
badf1662 | 187 | fdt ? fdt->max_fds : 0); |
4fb3a538 | 188 | rcu_read_unlock(); |
1da177e4 LT |
189 | |
190 | group_info = p->group_info; | |
191 | get_group_info(group_info); | |
192 | task_unlock(p); | |
193 | ||
194 | for (g = 0; g < min(group_info->ngroups,NGROUPS_SMALL); g++) | |
195 | buffer += sprintf(buffer, "%d ", GROUP_AT(group_info,g)); | |
196 | put_group_info(group_info); | |
197 | ||
198 | buffer += sprintf(buffer, "\n"); | |
199 | return buffer; | |
200 | } | |
201 | ||
202 | static char * render_sigset_t(const char *header, sigset_t *set, char *buffer) | |
203 | { | |
204 | int i, len; | |
205 | ||
206 | len = strlen(header); | |
207 | memcpy(buffer, header, len); | |
208 | buffer += len; | |
209 | ||
210 | i = _NSIG; | |
211 | do { | |
212 | int x = 0; | |
213 | ||
214 | i -= 4; | |
215 | if (sigismember(set, i+1)) x |= 1; | |
216 | if (sigismember(set, i+2)) x |= 2; | |
217 | if (sigismember(set, i+3)) x |= 4; | |
218 | if (sigismember(set, i+4)) x |= 8; | |
219 | *buffer++ = (x < 10 ? '0' : 'a' - 10) + x; | |
220 | } while (i >= 4); | |
221 | ||
222 | *buffer++ = '\n'; | |
223 | *buffer = 0; | |
224 | return buffer; | |
225 | } | |
226 | ||
227 | static void collect_sigign_sigcatch(struct task_struct *p, sigset_t *ign, | |
228 | sigset_t *catch) | |
229 | { | |
230 | struct k_sigaction *k; | |
231 | int i; | |
232 | ||
233 | k = p->sighand->action; | |
234 | for (i = 1; i <= _NSIG; ++i, ++k) { | |
235 | if (k->sa.sa_handler == SIG_IGN) | |
236 | sigaddset(ign, i); | |
237 | else if (k->sa.sa_handler != SIG_DFL) | |
238 | sigaddset(catch, i); | |
239 | } | |
240 | } | |
241 | ||
242 | static inline char * task_sig(struct task_struct *p, char *buffer) | |
243 | { | |
5e6b3f42 | 244 | unsigned long flags; |
1da177e4 LT |
245 | sigset_t pending, shpending, blocked, ignored, caught; |
246 | int num_threads = 0; | |
247 | unsigned long qsize = 0; | |
248 | unsigned long qlim = 0; | |
249 | ||
250 | sigemptyset(&pending); | |
251 | sigemptyset(&shpending); | |
252 | sigemptyset(&blocked); | |
253 | sigemptyset(&ignored); | |
254 | sigemptyset(&caught); | |
255 | ||
5e6b3f42 ON |
256 | rcu_read_lock(); |
257 | if (lock_task_sighand(p, &flags)) { | |
1da177e4 LT |
258 | pending = p->pending.signal; |
259 | shpending = p->signal->shared_pending.signal; | |
260 | blocked = p->blocked; | |
261 | collect_sigign_sigcatch(p, &ignored, &caught); | |
262 | num_threads = atomic_read(&p->signal->count); | |
263 | qsize = atomic_read(&p->user->sigpending); | |
264 | qlim = p->signal->rlim[RLIMIT_SIGPENDING].rlim_cur; | |
5e6b3f42 | 265 | unlock_task_sighand(p, &flags); |
1da177e4 | 266 | } |
5e6b3f42 | 267 | rcu_read_unlock(); |
1da177e4 LT |
268 | |
269 | buffer += sprintf(buffer, "Threads:\t%d\n", num_threads); | |
270 | buffer += sprintf(buffer, "SigQ:\t%lu/%lu\n", qsize, qlim); | |
271 | ||
272 | /* render them all */ | |
273 | buffer = render_sigset_t("SigPnd:\t", &pending, buffer); | |
274 | buffer = render_sigset_t("ShdPnd:\t", &shpending, buffer); | |
275 | buffer = render_sigset_t("SigBlk:\t", &blocked, buffer); | |
276 | buffer = render_sigset_t("SigIgn:\t", &ignored, buffer); | |
277 | buffer = render_sigset_t("SigCgt:\t", &caught, buffer); | |
278 | ||
279 | return buffer; | |
280 | } | |
281 | ||
282 | static inline char *task_cap(struct task_struct *p, char *buffer) | |
283 | { | |
284 | return buffer + sprintf(buffer, "CapInh:\t%016x\n" | |
285 | "CapPrm:\t%016x\n" | |
286 | "CapEff:\t%016x\n", | |
287 | cap_t(p->cap_inheritable), | |
288 | cap_t(p->cap_permitted), | |
289 | cap_t(p->cap_effective)); | |
290 | } | |
291 | ||
292 | int proc_pid_status(struct task_struct *task, char * buffer) | |
293 | { | |
294 | char * orig = buffer; | |
295 | struct mm_struct *mm = get_task_mm(task); | |
296 | ||
297 | buffer = task_name(task, buffer); | |
298 | buffer = task_state(task, buffer); | |
299 | ||
300 | if (mm) { | |
301 | buffer = task_mem(mm, buffer); | |
302 | mmput(mm); | |
303 | } | |
304 | buffer = task_sig(task, buffer); | |
305 | buffer = task_cap(task, buffer); | |
306 | buffer = cpuset_task_status_allowed(task, buffer); | |
347a8dc3 | 307 | #if defined(CONFIG_S390) |
1da177e4 LT |
308 | buffer = task_show_regs(task, buffer); |
309 | #endif | |
310 | return buffer - orig; | |
311 | } | |
312 | ||
b27f03d4 IM |
313 | static clock_t task_utime(struct task_struct *p) |
314 | { | |
315 | clock_t utime = cputime_to_clock_t(p->utime), | |
316 | total = utime + cputime_to_clock_t(p->stime); | |
317 | u64 temp; | |
318 | ||
319 | /* | |
320 | * Use CFS's precise accounting: | |
321 | */ | |
322 | temp = (u64)nsec_to_clock_t(p->se.sum_exec_runtime); | |
323 | ||
324 | if (total) { | |
325 | temp *= utime; | |
326 | do_div(temp, total); | |
327 | } | |
328 | utime = (clock_t)temp; | |
329 | ||
330 | return utime; | |
331 | } | |
332 | ||
333 | static clock_t task_stime(struct task_struct *p) | |
334 | { | |
335 | clock_t stime = cputime_to_clock_t(p->stime); | |
336 | ||
337 | /* | |
338 | * Use CFS's precise accounting. (we subtract utime from | |
339 | * the total, to make sure the total observed by userspace | |
340 | * grows monotonically - apps rely on that): | |
341 | */ | |
342 | stime = nsec_to_clock_t(p->se.sum_exec_runtime) - task_utime(p); | |
343 | ||
344 | return stime; | |
345 | } | |
346 | ||
347 | ||
1da177e4 LT |
348 | static int do_task_stat(struct task_struct *task, char * buffer, int whole) |
349 | { | |
350 | unsigned long vsize, eip, esp, wchan = ~0UL; | |
351 | long priority, nice; | |
352 | int tty_pgrp = -1, tty_nr = 0; | |
353 | sigset_t sigign, sigcatch; | |
354 | char state; | |
355 | int res; | |
a593d6ed | 356 | pid_t ppid = 0, pgid = -1, sid = -1; |
1da177e4 LT |
357 | int num_threads = 0; |
358 | struct mm_struct *mm; | |
359 | unsigned long long start_time; | |
360 | unsigned long cmin_flt = 0, cmaj_flt = 0; | |
361 | unsigned long min_flt = 0, maj_flt = 0; | |
b27f03d4 IM |
362 | cputime_t cutime, cstime; |
363 | clock_t utime, stime; | |
1da177e4 | 364 | unsigned long rsslim = 0; |
1da177e4 | 365 | char tcomm[sizeof(task->comm)]; |
a593d6ed | 366 | unsigned long flags; |
1da177e4 LT |
367 | |
368 | state = *get_task_state(task); | |
369 | vsize = eip = esp = 0; | |
370 | mm = get_task_mm(task); | |
371 | if (mm) { | |
372 | vsize = task_vsize(mm); | |
373 | eip = KSTK_EIP(task); | |
374 | esp = KSTK_ESP(task); | |
375 | } | |
376 | ||
377 | get_task_comm(tcomm, task); | |
378 | ||
379 | sigemptyset(&sigign); | |
380 | sigemptyset(&sigcatch); | |
b27f03d4 IM |
381 | cutime = cstime = cputime_zero; |
382 | utime = stime = 0; | |
3cfd0885 | 383 | |
a593d6ed ON |
384 | rcu_read_lock(); |
385 | if (lock_task_sighand(task, &flags)) { | |
386 | struct signal_struct *sig = task->signal; | |
91593504 ON |
387 | |
388 | if (sig->tty) { | |
ab521dc0 | 389 | tty_pgrp = pid_nr(sig->tty->pgrp); |
91593504 | 390 | tty_nr = new_encode_dev(tty_devnum(sig->tty)); |
a593d6ed ON |
391 | } |
392 | ||
393 | num_threads = atomic_read(&sig->count); | |
1da177e4 LT |
394 | collect_sigign_sigcatch(task, &sigign, &sigcatch); |
395 | ||
a593d6ed ON |
396 | cmin_flt = sig->cmin_flt; |
397 | cmaj_flt = sig->cmaj_flt; | |
398 | cutime = sig->cutime; | |
399 | cstime = sig->cstime; | |
400 | rsslim = sig->rlim[RLIMIT_RSS].rlim_cur; | |
401 | ||
1da177e4 LT |
402 | /* add up live thread stats at the group level */ |
403 | if (whole) { | |
a593d6ed | 404 | struct task_struct *t = task; |
1da177e4 LT |
405 | do { |
406 | min_flt += t->min_flt; | |
407 | maj_flt += t->maj_flt; | |
b27f03d4 IM |
408 | utime += task_utime(t); |
409 | stime += task_stime(t); | |
1da177e4 LT |
410 | t = next_thread(t); |
411 | } while (t != task); | |
1da177e4 | 412 | |
a593d6ed ON |
413 | min_flt += sig->min_flt; |
414 | maj_flt += sig->maj_flt; | |
b27f03d4 IM |
415 | utime += cputime_to_clock_t(sig->utime); |
416 | stime += cputime_to_clock_t(sig->stime); | |
1da177e4 | 417 | } |
a593d6ed | 418 | |
1ec320af | 419 | sid = signal_session(sig); |
1da177e4 | 420 | pgid = process_group(task); |
a593d6ed ON |
421 | ppid = rcu_dereference(task->real_parent)->tgid; |
422 | ||
423 | unlock_task_sighand(task, &flags); | |
1da177e4 | 424 | } |
a593d6ed | 425 | rcu_read_unlock(); |
1da177e4 LT |
426 | |
427 | if (!whole || num_threads<2) | |
428 | wchan = get_wchan(task); | |
429 | if (!whole) { | |
430 | min_flt = task->min_flt; | |
431 | maj_flt = task->maj_flt; | |
b27f03d4 IM |
432 | utime = task_utime(task); |
433 | stime = task_stime(task); | |
1da177e4 LT |
434 | } |
435 | ||
436 | /* scale priority and nice values from timeslices to -20..20 */ | |
437 | /* to make it look like a "normal" Unix priority/nice value */ | |
438 | priority = task_prio(task); | |
439 | nice = task_nice(task); | |
440 | ||
441 | /* Temporary variable needed for gcc-2.96 */ | |
442 | /* convert timespec -> nsec*/ | |
924b42d5 TJ |
443 | start_time = |
444 | (unsigned long long)task->real_start_time.tv_sec * NSEC_PER_SEC | |
445 | + task->real_start_time.tv_nsec; | |
1da177e4 LT |
446 | /* convert nsec -> ticks */ |
447 | start_time = nsec_to_clock_t(start_time); | |
448 | ||
97dc32cd | 449 | res = sprintf(buffer,"%d (%s) %c %d %d %d %d %d %u %lu \ |
4dee26b7 | 450 | %lu %lu %lu %lu %lu %ld %ld %ld %ld %d 0 %llu %lu %ld %lu %lu %lu %lu %lu \ |
97dc32cd | 451 | %lu %lu %lu %lu %lu %lu %lu %lu %d %d %u %u %llu\n", |
1da177e4 LT |
452 | task->pid, |
453 | tcomm, | |
454 | state, | |
455 | ppid, | |
456 | pgid, | |
457 | sid, | |
458 | tty_nr, | |
459 | tty_pgrp, | |
460 | task->flags, | |
461 | min_flt, | |
462 | cmin_flt, | |
463 | maj_flt, | |
464 | cmaj_flt, | |
b27f03d4 IM |
465 | utime, |
466 | stime, | |
1da177e4 LT |
467 | cputime_to_clock_t(cutime), |
468 | cputime_to_clock_t(cstime), | |
469 | priority, | |
470 | nice, | |
471 | num_threads, | |
1da177e4 LT |
472 | start_time, |
473 | vsize, | |
4294621f | 474 | mm ? get_mm_rss(mm) : 0, |
1da177e4 LT |
475 | rsslim, |
476 | mm ? mm->start_code : 0, | |
477 | mm ? mm->end_code : 0, | |
478 | mm ? mm->start_stack : 0, | |
479 | esp, | |
480 | eip, | |
481 | /* The signal information here is obsolete. | |
482 | * It must be decimal for Linux 2.0 compatibility. | |
483 | * Use /proc/#/status for real-time signals. | |
484 | */ | |
485 | task->pending.signal.sig[0] & 0x7fffffffUL, | |
486 | task->blocked.sig[0] & 0x7fffffffUL, | |
487 | sigign .sig[0] & 0x7fffffffUL, | |
488 | sigcatch .sig[0] & 0x7fffffffUL, | |
489 | wchan, | |
490 | 0UL, | |
491 | 0UL, | |
492 | task->exit_signal, | |
493 | task_cpu(task), | |
494 | task->rt_priority, | |
25890454 SN |
495 | task->policy, |
496 | (unsigned long long)delayacct_blkio_ticks(task)); | |
1da177e4 LT |
497 | if(mm) |
498 | mmput(mm); | |
499 | return res; | |
500 | } | |
501 | ||
502 | int proc_tid_stat(struct task_struct *task, char * buffer) | |
503 | { | |
504 | return do_task_stat(task, buffer, 0); | |
505 | } | |
506 | ||
507 | int proc_tgid_stat(struct task_struct *task, char * buffer) | |
508 | { | |
509 | return do_task_stat(task, buffer, 1); | |
510 | } | |
511 | ||
512 | int proc_pid_statm(struct task_struct *task, char *buffer) | |
513 | { | |
514 | int size = 0, resident = 0, shared = 0, text = 0, lib = 0, data = 0; | |
515 | struct mm_struct *mm = get_task_mm(task); | |
516 | ||
517 | if (mm) { | |
518 | size = task_statm(mm, &shared, &text, &data, &resident); | |
519 | mmput(mm); | |
520 | } | |
521 | ||
522 | return sprintf(buffer,"%d %d %d %d %d %d %d\n", | |
523 | size, resident, shared, text, lib, data, 0); | |
524 | } |