2 * linux/fs/proc/array.c
4 * Copyright (C) 1992 by Linus Torvalds
5 * based on ideas by Darren Senn
8 * Michael. K. Johnson: stat,statm extensions.
9 * <johnsonm@stolaf.edu>
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>
17 * Danny ter Haar : added cpuinfo
20 * Alessandro Rubini : profile extension.
21 * <rubini@ipvvis.unipv.it>
23 * Jeff Tranter : added BogoMips field to cpuinfo
24 * <Jeff_Tranter@Mitel.COM>
26 * Bruno Haible : remove 4K limit for the maps file
27 * <haible@ma2s2.mathematik.uni-karlsruhe.de>
29 * Yves Arrouye : remove removal of trailing spaces in get_array.
30 * <Yves.Arrouye@marin.fdn.fr>
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>
39 * aeb@cwi.nl : /proc/partitions
42 * Alan Cox : security fixes.
43 * <Alan.Cox@linux.org>
45 * Al Viro : safe handling of mm_struct
47 * Gerhard Wichert : added BIGMEM support
48 * Siemens AG <Gerhard.Wichert@pdb.siemens.de>
50 * Al Viro & Jeff Garzik : moved most of the thing into base.c and
51 * : proc_misc.c. The rest may eventually go into
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>
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>
76 #include <linux/rcupdate.h>
77 #include <linux/delayacct.h>
79 #include <asm/uaccess.h>
80 #include <asm/pgtable.h>
82 #include <asm/processor.h>
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)
90 static inline char * task_name(struct task_struct *p, char * buf)
94 char tcomm[sizeof(p->comm)];
96 get_task_comm(tcomm, p);
98 ADDBUF(buf, "Name:\t");
102 unsigned char c = *name;
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
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 */
141 static inline const char * get_task_state(struct task_struct *tsk)
143 unsigned int state = (tsk->state & (TASK_RUNNING |
145 TASK_UNINTERRUPTIBLE |
148 (tsk->exit_state & (EXIT_ZOMBIE |
150 const char **p = &task_state_array[0];
159 static inline char * task_state(struct task_struct *p, char *buffer)
161 struct group_info *group_info;
163 struct fdtable *fdt = NULL;
166 buffer += sprintf(buffer,
172 "Uid:\t%d\t%d\t%d\t%d\n"
173 "Gid:\t%d\t%d\t%d\t%d\n",
176 pid_alive(p) ? rcu_dereference(p->real_parent)->tgid : 0,
177 pid_alive(p) && p->ptrace ? rcu_dereference(p->parent)->pid : 0,
178 p->uid, p->euid, p->suid, p->fsuid,
179 p->gid, p->egid, p->sgid, p->fsgid);
183 fdt = files_fdtable(p->files);
184 buffer += sprintf(buffer,
187 fdt ? fdt->max_fds : 0);
190 group_info = p->group_info;
191 get_group_info(group_info);
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);
198 buffer += sprintf(buffer, "\n");
202 static char * render_sigset_t(const char *header, sigset_t *set, char *buffer)
206 len = strlen(header);
207 memcpy(buffer, header, len);
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;
227 static void collect_sigign_sigcatch(struct task_struct *p, sigset_t *ign,
230 struct k_sigaction *k;
233 k = p->sighand->action;
234 for (i = 1; i <= _NSIG; ++i, ++k) {
235 if (k->sa.sa_handler == SIG_IGN)
237 else if (k->sa.sa_handler != SIG_DFL)
242 static inline char * task_sig(struct task_struct *p, char *buffer)
245 sigset_t pending, shpending, blocked, ignored, caught;
247 unsigned long qsize = 0;
248 unsigned long qlim = 0;
250 sigemptyset(&pending);
251 sigemptyset(&shpending);
252 sigemptyset(&blocked);
253 sigemptyset(&ignored);
254 sigemptyset(&caught);
257 if (lock_task_sighand(p, &flags)) {
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;
265 unlock_task_sighand(p, &flags);
269 buffer += sprintf(buffer, "Threads:\t%d\n", num_threads);
270 buffer += sprintf(buffer, "SigQ:\t%lu/%lu\n", qsize, qlim);
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);
282 static inline char *task_cap(struct task_struct *p, char *buffer)
284 return buffer + sprintf(buffer, "CapInh:\t%016x\n"
287 cap_t(p->cap_inheritable),
288 cap_t(p->cap_permitted),
289 cap_t(p->cap_effective));
292 int proc_pid_status(struct task_struct *task, char * buffer)
294 char * orig = buffer;
295 struct mm_struct *mm = get_task_mm(task);
297 buffer = task_name(task, buffer);
298 buffer = task_state(task, buffer);
301 buffer = task_mem(mm, buffer);
304 buffer = task_sig(task, buffer);
305 buffer = task_cap(task, buffer);
306 buffer = cpuset_task_status_allowed(task, buffer);
307 #if defined(CONFIG_S390)
308 buffer = task_show_regs(task, buffer);
310 return buffer - orig;
313 static clock_t task_utime(struct task_struct *p)
315 clock_t utime = cputime_to_clock_t(p->utime),
316 total = utime + cputime_to_clock_t(p->stime);
320 * Use CFS's precise accounting:
322 temp = (u64)nsec_to_clock_t(p->se.sum_exec_runtime);
328 utime = (clock_t)temp;
333 static clock_t task_stime(struct task_struct *p)
335 clock_t stime = cputime_to_clock_t(p->stime);
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):
342 stime = nsec_to_clock_t(p->se.sum_exec_runtime) - task_utime(p);
348 static int do_task_stat(struct task_struct *task, char * buffer, int whole)
350 unsigned long vsize, eip, esp, wchan = ~0UL;
352 int tty_pgrp = -1, tty_nr = 0;
353 sigset_t sigign, sigcatch;
356 pid_t ppid = 0, pgid = -1, sid = -1;
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;
362 cputime_t cutime, cstime;
363 clock_t utime, stime;
364 unsigned long rsslim = 0;
365 char tcomm[sizeof(task->comm)];
368 state = *get_task_state(task);
369 vsize = eip = esp = 0;
370 mm = get_task_mm(task);
372 vsize = task_vsize(mm);
373 eip = KSTK_EIP(task);
374 esp = KSTK_ESP(task);
377 get_task_comm(tcomm, task);
379 sigemptyset(&sigign);
380 sigemptyset(&sigcatch);
381 cutime = cstime = cputime_zero;
385 if (lock_task_sighand(task, &flags)) {
386 struct signal_struct *sig = task->signal;
389 tty_pgrp = pid_nr(sig->tty->pgrp);
390 tty_nr = new_encode_dev(tty_devnum(sig->tty));
393 num_threads = atomic_read(&sig->count);
394 collect_sigign_sigcatch(task, &sigign, &sigcatch);
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;
402 /* add up live thread stats at the group level */
404 struct task_struct *t = task;
406 min_flt += t->min_flt;
407 maj_flt += t->maj_flt;
408 utime += task_utime(t);
409 stime += task_stime(t);
413 min_flt += sig->min_flt;
414 maj_flt += sig->maj_flt;
415 utime += cputime_to_clock_t(sig->utime);
416 stime += cputime_to_clock_t(sig->stime);
419 sid = signal_session(sig);
420 pgid = process_group(task);
421 ppid = rcu_dereference(task->real_parent)->tgid;
423 unlock_task_sighand(task, &flags);
427 if (!whole || num_threads<2)
428 wchan = get_wchan(task);
430 min_flt = task->min_flt;
431 maj_flt = task->maj_flt;
432 utime = task_utime(task);
433 stime = task_stime(task);
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);
441 /* Temporary variable needed for gcc-2.96 */
442 /* convert timespec -> nsec*/
443 start_time = (unsigned long long)task->start_time.tv_sec * NSEC_PER_SEC
444 + task->start_time.tv_nsec;
445 /* convert nsec -> ticks */
446 start_time = nsec_to_clock_t(start_time);
448 res = sprintf(buffer,"%d (%s) %c %d %d %d %d %d %u %lu \
449 %lu %lu %lu %lu %lu %ld %ld %ld %ld %d 0 %llu %lu %ld %lu %lu %lu %lu %lu \
450 %lu %lu %lu %lu %lu %lu %lu %lu %d %d %u %u %llu\n",
466 cputime_to_clock_t(cutime),
467 cputime_to_clock_t(cstime),
473 mm ? get_mm_rss(mm) : 0,
475 mm ? mm->start_code : 0,
476 mm ? mm->end_code : 0,
477 mm ? mm->start_stack : 0,
480 /* The signal information here is obsolete.
481 * It must be decimal for Linux 2.0 compatibility.
482 * Use /proc/#/status for real-time signals.
484 task->pending.signal.sig[0] & 0x7fffffffUL,
485 task->blocked.sig[0] & 0x7fffffffUL,
486 sigign .sig[0] & 0x7fffffffUL,
487 sigcatch .sig[0] & 0x7fffffffUL,
495 (unsigned long long)delayacct_blkio_ticks(task));
501 int proc_tid_stat(struct task_struct *task, char * buffer)
503 return do_task_stat(task, buffer, 0);
506 int proc_tgid_stat(struct task_struct *task, char * buffer)
508 return do_task_stat(task, buffer, 1);
511 int proc_pid_statm(struct task_struct *task, char *buffer)
513 int size = 0, resident = 0, shared = 0, text = 0, lib = 0, data = 0;
514 struct mm_struct *mm = get_task_mm(task);
517 size = task_statm(mm, &shared, &text, &data, &resident);
521 return sprintf(buffer,"%d %d %d %d %d %d %d\n",
522 size, resident, shared, text, lib, data, 0);