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/config.h>
56 #include <linux/types.h>
57 #include <linux/errno.h>
58 #include <linux/time.h>
59 #include <linux/kernel.h>
60 #include <linux/kernel_stat.h>
61 #include <linux/tty.h>
62 #include <linux/string.h>
63 #include <linux/mman.h>
64 #include <linux/proc_fs.h>
65 #include <linux/ioport.h>
67 #include <linux/hugetlb.h>
68 #include <linux/pagemap.h>
69 #include <linux/swap.h>
70 #include <linux/slab.h>
71 #include <linux/smp.h>
72 #include <linux/signal.h>
73 #include <linux/highmem.h>
74 #include <linux/file.h>
75 #include <linux/times.h>
76 #include <linux/cpuset.h>
77 #include <linux/vs_context.h>
78 #include <linux/vs_network.h>
79 #include <linux/vs_cvirt.h>
81 #include <asm/uaccess.h>
82 #include <asm/pgtable.h>
84 #include <asm/processor.h>
87 /* Gcc optimizes away "strlen(x)" for constant x */
88 #define ADDBUF(buffer, string) \
89 do { memcpy(buffer, string, strlen(string)); \
90 buffer += strlen(string); } while (0)
92 static inline char * task_name(struct task_struct *p, char * buf)
96 char tcomm[sizeof(p->comm)];
98 get_task_comm(tcomm, p);
100 ADDBUF(buf, "Name:\t");
104 unsigned char c = *name;
128 * The task state array is a strange "bitmap" of
129 * reasons to sleep. Thus "running" is zero, and
130 * you can test for combinations of others with
133 static const char *task_state_array[] = {
134 "R (running)", /* 0 */
135 "S (sleeping)", /* 1 */
136 "D (disk sleep)", /* 2 */
137 "T (stopped)", /* 4 */
138 "T (tracing stop)", /* 8 */
139 "Z (zombie)", /* 16 */
141 "H (on hold)" /* 64 */
144 static inline const char * get_task_state(struct task_struct *tsk)
146 unsigned int state = (tsk->state & (TASK_RUNNING |
148 TASK_UNINTERRUPTIBLE |
152 (tsk->exit_state & (EXIT_ZOMBIE |
154 const char **p = &task_state_array[0];
163 static inline char * task_state(struct task_struct *p, char *buffer)
165 struct group_info *group_info;
167 pid_t pid, ptgid, tppid, tgid;
169 read_lock(&tasklist_lock);
170 tgid = vx_map_tgid(p->tgid);
171 pid = vx_map_pid(p->pid);
172 ptgid = vx_map_pid(p->group_leader->real_parent->tgid);
173 tppid = vx_map_pid(p->parent->pid);
174 buffer += sprintf(buffer,
181 "Uid:\t%d\t%d\t%d\t%d\n"
182 "Gid:\t%d\t%d\t%d\t%d\n",
184 (p->sleep_avg/1024)*100/(1020000000/1024),
185 tgid, pid, (pid > 1) ? ptgid : 0,
186 pid_alive(p) && p->ptrace ? tppid : 0,
187 p->uid, p->euid, p->suid, p->fsuid,
188 p->gid, p->egid, p->sgid, p->fsgid);
189 read_unlock(&tasklist_lock);
191 buffer += sprintf(buffer,
194 p->files ? p->files->max_fds : 0);
196 group_info = p->group_info;
197 get_group_info(group_info);
200 for (g = 0; g < min(group_info->ngroups,NGROUPS_SMALL); g++)
201 buffer += sprintf(buffer, "%d ", GROUP_AT(group_info,g));
202 put_group_info(group_info);
204 buffer += sprintf(buffer, "\n");
208 static char * render_sigset_t(const char *header, sigset_t *set, char *buffer)
212 len = strlen(header);
213 memcpy(buffer, header, len);
221 if (sigismember(set, i+1)) x |= 1;
222 if (sigismember(set, i+2)) x |= 2;
223 if (sigismember(set, i+3)) x |= 4;
224 if (sigismember(set, i+4)) x |= 8;
225 *buffer++ = (x < 10 ? '0' : 'a' - 10) + x;
233 static void collect_sigign_sigcatch(struct task_struct *p, sigset_t *ign,
236 struct k_sigaction *k;
239 k = p->sighand->action;
240 for (i = 1; i <= _NSIG; ++i, ++k) {
241 if (k->sa.sa_handler == SIG_IGN)
243 else if (k->sa.sa_handler != SIG_DFL)
248 static inline char * task_sig(struct task_struct *p, char *buffer)
250 sigset_t pending, shpending, blocked, ignored, caught;
252 unsigned long qsize = 0;
253 unsigned long qlim = 0;
255 sigemptyset(&pending);
256 sigemptyset(&shpending);
257 sigemptyset(&blocked);
258 sigemptyset(&ignored);
259 sigemptyset(&caught);
261 /* Gather all the data with the appropriate locks held */
262 read_lock(&tasklist_lock);
264 spin_lock_irq(&p->sighand->siglock);
265 pending = p->pending.signal;
266 shpending = p->signal->shared_pending.signal;
267 blocked = p->blocked;
268 collect_sigign_sigcatch(p, &ignored, &caught);
269 num_threads = atomic_read(&p->signal->count);
270 qsize = atomic_read(&p->user->sigpending);
271 qlim = p->signal->rlim[RLIMIT_SIGPENDING].rlim_cur;
272 spin_unlock_irq(&p->sighand->siglock);
274 read_unlock(&tasklist_lock);
276 buffer += sprintf(buffer, "Threads:\t%d\n", num_threads);
277 buffer += sprintf(buffer, "SigQ:\t%lu/%lu\n", qsize, qlim);
279 /* render them all */
280 buffer = render_sigset_t("SigPnd:\t", &pending, buffer);
281 buffer = render_sigset_t("ShdPnd:\t", &shpending, buffer);
282 buffer = render_sigset_t("SigBlk:\t", &blocked, buffer);
283 buffer = render_sigset_t("SigIgn:\t", &ignored, buffer);
284 buffer = render_sigset_t("SigCgt:\t", &caught, buffer);
289 static inline char *task_cap(struct task_struct *p, char *buffer)
291 return buffer + sprintf(buffer, "CapInh:\t%016x\n"
294 cap_t(p->cap_inheritable),
295 cap_t(p->cap_permitted),
296 cap_t(p->cap_effective));
299 int proc_pid_status(struct task_struct *task, char * buffer)
301 char * orig = buffer;
302 #ifdef CONFIG_VSERVER_LEGACY
305 #ifdef CONFIG_VSERVER_LEGACYNET
308 struct mm_struct *mm = get_task_mm(task);
310 buffer = task_name(task, buffer);
311 buffer = task_state(task, buffer);
314 buffer = task_mem(mm, buffer);
317 buffer = task_sig(task, buffer);
318 buffer = task_cap(task, buffer);
319 buffer = cpuset_task_status_allowed(task, buffer);
321 if (task_vx_flags(task, VXF_INFO_HIDE, 0))
323 #ifdef CONFIG_VSERVER_LEGACY
324 buffer += sprintf (buffer,"s_context: %d\n", vx_task_xid(task));
325 vxi = task_get_vx_info(task);
327 buffer += sprintf (buffer,"ctxflags: %08llx\n"
328 ,(unsigned long long)vxi->vx_flags);
329 buffer += sprintf (buffer,"initpid: %d\n"
332 buffer += sprintf (buffer,"ctxflags: none\n");
333 buffer += sprintf (buffer,"initpid: none\n");
337 buffer += sprintf (buffer,"VxID: %d\n", vx_task_xid(task));
339 #ifdef CONFIG_VSERVER_LEGACYNET
340 nxi = task_get_nx_info(task);
344 buffer += sprintf (buffer,"ipv4root:");
345 for (i=0; i<nxi->nbipv4; i++){
346 buffer += sprintf (buffer," %08x/%08x"
351 buffer += sprintf (buffer,"ipv4root_bcast: %08x\n"
354 buffer += sprintf (buffer,"ipv4root: 0\n");
355 buffer += sprintf (buffer,"ipv4root_bcast: 0\n");
360 #if defined(CONFIG_ARCH_S390)
361 buffer = task_show_regs(task, buffer);
363 return buffer - orig;
366 static int do_task_stat(struct task_struct *task, char * buffer, int whole)
368 unsigned long vsize, eip, esp, wchan = ~0UL;
370 unsigned long long bias_uptime = 0;
371 int tty_pgrp = -1, tty_nr = 0;
372 sigset_t sigign, sigcatch;
375 pid_t pid, ppid, pgid = -1, sid = -1;
377 struct mm_struct *mm;
378 unsigned long long start_time;
379 unsigned long cmin_flt = 0, cmaj_flt = 0;
380 unsigned long min_flt = 0, maj_flt = 0;
381 cputime_t cutime, cstime, utime, stime;
382 unsigned long rsslim = 0;
383 unsigned long it_real_value = 0;
384 struct task_struct *t;
385 char tcomm[sizeof(task->comm)];
387 state = *get_task_state(task);
388 vsize = eip = esp = 0;
389 mm = get_task_mm(task);
391 vsize = task_vsize(mm);
392 eip = KSTK_EIP(task);
393 esp = KSTK_ESP(task);
396 get_task_comm(tcomm, task);
398 sigemptyset(&sigign);
399 sigemptyset(&sigcatch);
400 cutime = cstime = utime = stime = cputime_zero;
401 read_lock(&tasklist_lock);
403 spin_lock_irq(&task->sighand->siglock);
404 num_threads = atomic_read(&task->signal->count);
405 collect_sigign_sigcatch(task, &sigign, &sigcatch);
407 /* add up live thread stats at the group level */
411 min_flt += t->min_flt;
412 maj_flt += t->maj_flt;
413 utime = cputime_add(utime, t->utime);
414 stime = cputime_add(stime, t->stime);
419 spin_unlock_irq(&task->sighand->siglock);
422 if (task->signal->tty) {
423 tty_pgrp = task->signal->tty->pgrp;
424 tty_nr = new_encode_dev(tty_devnum(task->signal->tty));
426 pgid = process_group(task);
427 sid = task->signal->session;
428 cmin_flt = task->signal->cmin_flt;
429 cmaj_flt = task->signal->cmaj_flt;
430 cutime = task->signal->cutime;
431 cstime = task->signal->cstime;
432 rsslim = task->signal->rlim[RLIMIT_RSS].rlim_cur;
434 min_flt += task->signal->min_flt;
435 maj_flt += task->signal->maj_flt;
436 utime = cputime_add(utime, task->signal->utime);
437 stime = cputime_add(stime, task->signal->stime);
439 it_real_value = task->signal->it_real_value;
441 pid = vx_info_map_pid(task->vx_info, pid_alive(task) ? task->pid : 0);
442 ppid = (!(pid > 1)) ? 0 : vx_info_map_tgid(task->vx_info,
443 task->group_leader->real_parent->tgid);
444 pgid = vx_info_map_pid(task->vx_info, pgid);
446 read_unlock(&tasklist_lock);
448 if (!whole || num_threads<2) {
450 if (current->uid == task->uid || current->euid == task->uid ||
451 capable(CAP_SYS_NICE))
452 wchan = get_wchan(task);
455 min_flt = task->min_flt;
456 maj_flt = task->maj_flt;
461 /* scale priority and nice values from timeslices to -20..20 */
462 /* to make it look like a "normal" Unix priority/nice value */
463 priority = task_prio(task);
464 nice = task_nice(task);
466 read_lock(&tasklist_lock);
467 pid = vx_info_map_pid(task->vx_info, task->pid);
468 ppid = (!(pid > 1)) ? 0 :
469 vx_info_map_pid(task->vx_info, task->real_parent->pid);
470 pgid = vx_info_map_pid(task->vx_info, pgid);
471 read_unlock(&tasklist_lock);
473 /* Temporary variable needed for gcc-2.96 */
474 /* convert timespec -> nsec*/
475 start_time = (unsigned long long)task->start_time.tv_sec * NSEC_PER_SEC
476 + task->start_time.tv_nsec;
478 /* convert nsec -> ticks */
479 start_time = nsec_to_clock_t(start_time - bias_uptime);
481 /* fixup start time for virt uptime */
482 if (vx_flags(VXF_VIRT_UPTIME, 0)) {
483 unsigned long long bias =
484 current->vx_info->cvirt.bias_clock;
486 if (start_time > bias)
492 /* fixup start time for virt uptime */
493 if (vx_flags(VXF_VIRT_UPTIME, 0)) {
494 unsigned long long bias =
495 current->vx_info->cvirt.bias_clock;
497 if (start_time > bias)
503 /* fixup start time for virt uptime */
504 if (vx_flags(VXF_VIRT_UPTIME, 0)) {
505 unsigned long long bias =
506 current->vx_info->cvirt.bias_clock;
508 if (start_time > bias)
514 /* fixup start time for virt uptime */
515 if (vx_flags(VXF_VIRT_UPTIME, 0)) {
516 unsigned long long bias =
517 current->vx_info->cvirt.bias_clock;
519 if (start_time > bias)
525 res = sprintf(buffer,"%d (%s) %c %d %d %d %d %d %lu %lu \
526 %lu %lu %lu %lu %lu %ld %ld %ld %ld %d %ld %llu %lu %ld %lu %lu %lu %lu %lu \
527 %lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %lu\n",
541 cputime_to_clock_t(utime),
542 cputime_to_clock_t(stime),
543 cputime_to_clock_t(cutime),
544 cputime_to_clock_t(cstime),
548 jiffies_to_clock_t(it_real_value),
551 mm ? get_mm_counter(mm, rss) : 0, /* you might want to shift this left 3 */
553 mm ? mm->start_code : 0,
554 mm ? mm->end_code : 0,
555 mm ? mm->start_stack : 0,
558 /* The signal information here is obsolete.
559 * It must be decimal for Linux 2.0 compatibility.
560 * Use /proc/#/status for real-time signals.
562 task->pending.signal.sig[0] & 0x7fffffffUL,
563 task->blocked.sig[0] & 0x7fffffffUL,
564 sigign .sig[0] & 0x7fffffffUL,
565 sigcatch .sig[0] & 0x7fffffffUL,
578 int proc_tid_stat(struct task_struct *task, char * buffer)
580 return do_task_stat(task, buffer, 0);
583 int proc_tgid_stat(struct task_struct *task, char * buffer)
585 return do_task_stat(task, buffer, 1);
588 int proc_pid_statm(struct task_struct *task, char *buffer)
590 int size = 0, resident = 0, shared = 0, text = 0, lib = 0, data = 0;
591 struct mm_struct *mm = get_task_mm(task);
594 size = task_statm(mm, &shared, &text, &data, &resident);
598 return sprintf(buffer,"%d %d %d %d %d %d %d\n",
599 size, resident, shared, text, lib, data, 0);