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/vs_context.h>
77 #include <linux/vs_network.h>
78 #include <linux/vs_cvirt.h>
80 #include <asm/uaccess.h>
81 #include <asm/pgtable.h>
83 #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 */
139 "H (on hold)" /* 64 */
142 static inline const char * get_task_state(struct task_struct *tsk)
144 unsigned int state = (tsk->state & (TASK_RUNNING |
146 TASK_UNINTERRUPTIBLE |
150 (tsk->exit_state & (EXIT_ZOMBIE |
152 const char **p = &task_state_array[0];
161 static inline char * task_state(struct task_struct *p, char *buffer)
163 struct group_info *group_info;
165 pid_t pid, ptgid, tppid, tgid;
167 read_lock(&tasklist_lock);
168 tgid = vx_map_tgid(p->tgid);
169 pid = vx_map_pid(p->pid);
170 ptgid = vx_map_pid(p->group_leader->real_parent->tgid);
171 tppid = vx_map_pid(p->parent->pid);
172 buffer += sprintf(buffer,
179 "Uid:\t%d\t%d\t%d\t%d\n"
180 "Gid:\t%d\t%d\t%d\t%d\n",
182 (p->sleep_avg/1024)*100/(1020000000/1024),
183 tgid, pid, (pid > 1) ? ptgid : 0,
184 pid_alive(p) && p->ptrace ? tppid : 0,
185 p->uid, p->euid, p->suid, p->fsuid,
186 p->gid, p->egid, p->sgid, p->fsgid);
187 read_unlock(&tasklist_lock);
189 buffer += sprintf(buffer,
192 p->files ? p->files->max_fds : 0);
194 group_info = p->group_info;
195 get_group_info(group_info);
198 for (g = 0; g < min(group_info->ngroups,NGROUPS_SMALL); g++)
199 buffer += sprintf(buffer, "%d ", GROUP_AT(group_info,g));
200 put_group_info(group_info);
202 buffer += sprintf(buffer, "\n");
206 static char * render_sigset_t(const char *header, sigset_t *set, char *buffer)
210 len = strlen(header);
211 memcpy(buffer, header, len);
219 if (sigismember(set, i+1)) x |= 1;
220 if (sigismember(set, i+2)) x |= 2;
221 if (sigismember(set, i+3)) x |= 4;
222 if (sigismember(set, i+4)) x |= 8;
223 *buffer++ = (x < 10 ? '0' : 'a' - 10) + x;
231 static void collect_sigign_sigcatch(struct task_struct *p, sigset_t *ign,
234 struct k_sigaction *k;
237 k = p->sighand->action;
238 for (i = 1; i <= _NSIG; ++i, ++k) {
239 if (k->sa.sa_handler == SIG_IGN)
241 else if (k->sa.sa_handler != SIG_DFL)
246 static inline char * task_sig(struct task_struct *p, char *buffer)
248 sigset_t pending, shpending, blocked, ignored, caught;
251 sigemptyset(&pending);
252 sigemptyset(&shpending);
253 sigemptyset(&blocked);
254 sigemptyset(&ignored);
255 sigemptyset(&caught);
257 /* Gather all the data with the appropriate locks held */
258 read_lock(&tasklist_lock);
260 spin_lock_irq(&p->sighand->siglock);
261 pending = p->pending.signal;
262 shpending = p->signal->shared_pending.signal;
263 blocked = p->blocked;
264 collect_sigign_sigcatch(p, &ignored, &caught);
265 num_threads = atomic_read(&p->signal->count);
266 spin_unlock_irq(&p->sighand->siglock);
268 read_unlock(&tasklist_lock);
270 buffer += sprintf(buffer, "Threads:\t%d\n", num_threads);
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 #ifdef CONFIG_VSERVER_LEGACY
299 struct mm_struct *mm = get_task_mm(task);
301 buffer = task_name(task, buffer);
302 buffer = task_state(task, buffer);
305 buffer = task_mem(mm, buffer);
308 buffer = task_sig(task, buffer);
309 buffer = task_cap(task, buffer);
311 #ifdef CONFIG_VSERVER_LEGACY
312 buffer += sprintf (buffer,"s_context: %d\n", vx_task_xid(task));
313 vxi = task_get_vx_info(task);
315 buffer += sprintf (buffer,"ctxflags: %08llx\n"
316 ,(unsigned long long)vxi->vx_flags);
317 buffer += sprintf (buffer,"initpid: %d\n"
320 buffer += sprintf (buffer,"ctxflags: none\n");
321 buffer += sprintf (buffer,"initpid: none\n");
324 nxi = task_get_nx_info(task);
328 buffer += sprintf (buffer,"ipv4root:");
329 for (i=0; i<nxi->nbipv4; i++){
330 buffer += sprintf (buffer," %08x/%08x"
335 buffer += sprintf (buffer,"ipv4root_bcast: %08x\n"
338 buffer += sprintf (buffer,"ipv4root: 0\n");
339 buffer += sprintf (buffer,"ipv4root_bcast: 0\n");
343 #if defined(CONFIG_ARCH_S390)
344 buffer = task_show_regs(task, buffer);
346 return buffer - orig;
349 static int do_task_stat(struct task_struct *task, char * buffer, int whole)
351 unsigned long vsize, eip, esp, wchan = ~0UL;
353 unsigned long long bias_uptime = 0;
354 int tty_pgrp = -1, tty_nr = 0;
355 sigset_t sigign, sigcatch;
358 pid_t pid, ppid, pgid = -1, sid = -1;
360 struct mm_struct *mm;
361 unsigned long long start_time;
362 unsigned long cmin_flt = 0, cmaj_flt = 0, cutime = 0, cstime = 0;
363 unsigned long min_flt = 0, maj_flt = 0, utime = 0, stime = 0;
364 unsigned long rsslim = 0;
365 struct task_struct *t;
366 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 read_lock(&tasklist_lock);
383 spin_lock_irq(&task->sighand->siglock);
384 num_threads = atomic_read(&task->signal->count);
385 collect_sigign_sigcatch(task, &sigign, &sigcatch);
387 /* add up live thread stats at the group level */
391 min_flt += t->min_flt;
392 maj_flt += t->maj_flt;
399 spin_unlock_irq(&task->sighand->siglock);
402 if (task->signal->tty) {
403 tty_pgrp = task->signal->tty->pgrp;
404 tty_nr = new_encode_dev(tty_devnum(task->signal->tty));
406 pgid = process_group(task);
407 sid = task->signal->session;
408 cmin_flt = task->signal->cmin_flt;
409 cmaj_flt = task->signal->cmaj_flt;
410 cutime = task->signal->cutime;
411 cstime = task->signal->cstime;
412 rsslim = task->signal->rlim[RLIMIT_RSS].rlim_cur;
414 min_flt += task->signal->min_flt;
415 maj_flt += task->signal->maj_flt;
416 utime += task->signal->utime;
417 stime += task->signal->stime;
420 pid = vx_info_map_pid(task->vx_info, pid_alive(task) ? task->pid : 0);
421 ppid = (!(pid > 1)) ? 0 : vx_info_map_tgid(task->vx_info,
422 task->group_leader->real_parent->tgid);
423 pgid = vx_info_map_pid(task->vx_info, pgid);
425 read_unlock(&tasklist_lock);
427 if (!whole || num_threads<2) {
429 if (current->uid == task->uid || current->euid == task->uid ||
430 capable(CAP_SYS_NICE))
431 wchan = get_wchan(task);
434 min_flt = task->min_flt;
435 maj_flt = task->maj_flt;
440 /* scale priority and nice values from timeslices to -20..20 */
441 /* to make it look like a "normal" Unix priority/nice value */
442 priority = task_prio(task);
443 nice = task_nice(task);
445 read_lock(&tasklist_lock);
446 pid = vx_info_map_pid(task->vx_info, task->pid);
447 ppid = (!(pid > 1)) ? 0 :
448 vx_info_map_pid(task->vx_info, task->real_parent->pid);
449 pgid = vx_info_map_pid(task->vx_info, pgid);
450 read_unlock(&tasklist_lock);
452 /* Temporary variable needed for gcc-2.96 */
453 /* convert timespec -> nsec*/
454 start_time = (unsigned long long)task->start_time.tv_sec * NSEC_PER_SEC
455 + task->start_time.tv_nsec;
457 /* convert nsec -> ticks */
458 start_time = nsec_to_clock_t(start_time - bias_uptime);
460 /* fixup start time for virt uptime */
461 if (vx_flags(VXF_VIRT_UPTIME, 0)) {
462 unsigned long long bias =
463 current->vx_info->cvirt.bias_clock;
465 if (start_time > bias)
471 res = sprintf(buffer,"%d (%s) %c %d %d %d %d %d %lu %lu \
472 %lu %lu %lu %lu %lu %ld %ld %ld %ld %d %ld %llu %lu %ld %lu %lu %lu %lu %lu \
473 %lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %lu\n",
487 jiffies_to_clock_t(utime),
488 jiffies_to_clock_t(stime),
489 jiffies_to_clock_t(cutime),
490 jiffies_to_clock_t(cstime),
494 jiffies_to_clock_t(task->it_real_value),
497 mm ? mm->rss : 0, /* you might want to shift this left 3 */
499 mm ? mm->start_code : 0,
500 mm ? mm->end_code : 0,
501 mm ? mm->start_stack : 0,
504 /* The signal information here is obsolete.
505 * It must be decimal for Linux 2.0 compatibility.
506 * Use /proc/#/status for real-time signals.
508 task->pending.signal.sig[0] & 0x7fffffffUL,
509 task->blocked.sig[0] & 0x7fffffffUL,
510 sigign .sig[0] & 0x7fffffffUL,
511 sigcatch .sig[0] & 0x7fffffffUL,
524 int proc_tid_stat(struct task_struct *task, char * buffer)
526 return do_task_stat(task, buffer, 0);
529 int proc_tgid_stat(struct task_struct *task, char * buffer)
531 return do_task_stat(task, buffer, 1);
534 int proc_pid_statm(struct task_struct *task, char *buffer)
536 int size = 0, resident = 0, shared = 0, text = 0, lib = 0, data = 0;
537 struct mm_struct *mm = get_task_mm(task);
540 size = task_statm(mm, &shared, &text, &data, &resident);
544 return sprintf(buffer,"%d %d %d %d %d %d %d\n",
545 size, resident, shared, text, lib, data, 0);
549 int proc_pid_delay(struct task_struct *task, char * buffer)
553 res = sprintf(buffer,"%u %llu %llu %u %llu %u %llu\n",
554 (unsigned int) get_delay(task,runs),
555 (uint64_t) get_delay(task,runcpu_total),
556 (uint64_t) get_delay(task,waitcpu_total),
557 (unsigned int) get_delay(task,num_iowaits),
558 (uint64_t) get_delay(task,iowait_total),
559 (unsigned int) get_delay(task,num_memwaits),
560 (uint64_t) get_delay(task,mem_iowait_total)