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/rcupdate.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
;
165 read_lock(&tasklist_lock
);
166 buffer
+= sprintf(buffer
,
173 "Uid:\t%d\t%d\t%d\t%d\n"
174 "Gid:\t%d\t%d\t%d\t%d\n",
176 (p
->sleep_avg
/1024)*100/(1020000000/1024),
178 p
->pid
, pid_alive(p
) ? p
->group_leader
->real_parent
->tgid
: 0,
179 pid_alive(p
) && p
->ptrace
? p
->parent
->pid
: 0,
180 p
->uid
, p
->euid
, p
->suid
, p
->fsuid
,
181 p
->gid
, p
->egid
, p
->sgid
, p
->fsgid
);
182 read_unlock(&tasklist_lock
);
186 fdt
= files_fdtable(p
->files
);
187 buffer
+= sprintf(buffer
,
190 fdt
? fdt
->max_fds
: 0);
193 group_info
= p
->group_info
;
194 get_group_info(group_info
);
197 for (g
= 0; g
< min(group_info
->ngroups
,NGROUPS_SMALL
); g
++)
198 buffer
+= sprintf(buffer
, "%d ", GROUP_AT(group_info
,g
));
199 put_group_info(group_info
);
201 buffer
+= sprintf(buffer
, "\n");
205 static char * render_sigset_t(const char *header
, sigset_t
*set
, char *buffer
)
209 len
= strlen(header
);
210 memcpy(buffer
, header
, len
);
218 if (sigismember(set
, i
+1)) x
|= 1;
219 if (sigismember(set
, i
+2)) x
|= 2;
220 if (sigismember(set
, i
+3)) x
|= 4;
221 if (sigismember(set
, i
+4)) x
|= 8;
222 *buffer
++ = (x
< 10 ? '0' : 'a' - 10) + x
;
230 static void collect_sigign_sigcatch(struct task_struct
*p
, sigset_t
*ign
,
233 struct k_sigaction
*k
;
236 k
= p
->sighand
->action
;
237 for (i
= 1; i
<= _NSIG
; ++i
, ++k
) {
238 if (k
->sa
.sa_handler
== SIG_IGN
)
240 else if (k
->sa
.sa_handler
!= SIG_DFL
)
245 static inline char * task_sig(struct task_struct
*p
, char *buffer
)
247 sigset_t pending
, shpending
, blocked
, ignored
, caught
;
249 unsigned long qsize
= 0;
250 unsigned long qlim
= 0;
252 sigemptyset(&pending
);
253 sigemptyset(&shpending
);
254 sigemptyset(&blocked
);
255 sigemptyset(&ignored
);
256 sigemptyset(&caught
);
258 /* Gather all the data with the appropriate locks held */
259 read_lock(&tasklist_lock
);
261 spin_lock_irq(&p
->sighand
->siglock
);
262 pending
= p
->pending
.signal
;
263 shpending
= p
->signal
->shared_pending
.signal
;
264 blocked
= p
->blocked
;
265 collect_sigign_sigcatch(p
, &ignored
, &caught
);
266 num_threads
= atomic_read(&p
->signal
->count
);
267 qsize
= atomic_read(&p
->user
->sigpending
);
268 qlim
= p
->signal
->rlim
[RLIMIT_SIGPENDING
].rlim_cur
;
269 spin_unlock_irq(&p
->sighand
->siglock
);
271 read_unlock(&tasklist_lock
);
273 buffer
+= sprintf(buffer
, "Threads:\t%d\n", num_threads
);
274 buffer
+= sprintf(buffer
, "SigQ:\t%lu/%lu\n", qsize
, qlim
);
276 /* render them all */
277 buffer
= render_sigset_t("SigPnd:\t", &pending
, buffer
);
278 buffer
= render_sigset_t("ShdPnd:\t", &shpending
, buffer
);
279 buffer
= render_sigset_t("SigBlk:\t", &blocked
, buffer
);
280 buffer
= render_sigset_t("SigIgn:\t", &ignored
, buffer
);
281 buffer
= render_sigset_t("SigCgt:\t", &caught
, buffer
);
286 static inline char *task_cap(struct task_struct
*p
, char *buffer
)
288 return buffer
+ sprintf(buffer
, "CapInh:\t%016x\n"
291 cap_t(p
->cap_inheritable
),
292 cap_t(p
->cap_permitted
),
293 cap_t(p
->cap_effective
));
296 int proc_pid_status(struct task_struct
*task
, char * buffer
)
298 char * orig
= buffer
;
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
);
310 buffer
= cpuset_task_status_allowed(task
, buffer
);
311 #if defined(CONFIG_S390)
312 buffer
= task_show_regs(task
, buffer
);
314 return buffer
- orig
;
317 static int do_task_stat(struct task_struct
*task
, char * buffer
, int whole
)
319 unsigned long vsize
, eip
, esp
, wchan
= ~0UL;
321 int tty_pgrp
= -1, tty_nr
= 0;
322 sigset_t sigign
, sigcatch
;
325 pid_t ppid
, pgid
= -1, sid
= -1;
327 struct mm_struct
*mm
;
328 unsigned long long start_time
;
329 unsigned long cmin_flt
= 0, cmaj_flt
= 0;
330 unsigned long min_flt
= 0, maj_flt
= 0;
331 cputime_t cutime
, cstime
, utime
, stime
;
332 unsigned long rsslim
= 0;
333 DEFINE_KTIME(it_real_value
);
334 struct task_struct
*t
;
335 char tcomm
[sizeof(task
->comm
)];
337 state
= *get_task_state(task
);
338 vsize
= eip
= esp
= 0;
339 mm
= get_task_mm(task
);
341 vsize
= task_vsize(mm
);
342 eip
= KSTK_EIP(task
);
343 esp
= KSTK_ESP(task
);
346 get_task_comm(tcomm
, task
);
348 sigemptyset(&sigign
);
349 sigemptyset(&sigcatch
);
350 cutime
= cstime
= utime
= stime
= cputime_zero
;
351 read_lock(&tasklist_lock
);
353 spin_lock_irq(&task
->sighand
->siglock
);
354 num_threads
= atomic_read(&task
->signal
->count
);
355 collect_sigign_sigcatch(task
, &sigign
, &sigcatch
);
357 /* add up live thread stats at the group level */
361 min_flt
+= t
->min_flt
;
362 maj_flt
+= t
->maj_flt
;
363 utime
= cputime_add(utime
, t
->utime
);
364 stime
= cputime_add(stime
, t
->stime
);
369 spin_unlock_irq(&task
->sighand
->siglock
);
372 if (task
->signal
->tty
) {
373 tty_pgrp
= task
->signal
->tty
->pgrp
;
374 tty_nr
= new_encode_dev(tty_devnum(task
->signal
->tty
));
376 pgid
= process_group(task
);
377 sid
= task
->signal
->session
;
378 cmin_flt
= task
->signal
->cmin_flt
;
379 cmaj_flt
= task
->signal
->cmaj_flt
;
380 cutime
= task
->signal
->cutime
;
381 cstime
= task
->signal
->cstime
;
382 rsslim
= task
->signal
->rlim
[RLIMIT_RSS
].rlim_cur
;
384 min_flt
+= task
->signal
->min_flt
;
385 maj_flt
+= task
->signal
->maj_flt
;
386 utime
= cputime_add(utime
, task
->signal
->utime
);
387 stime
= cputime_add(stime
, task
->signal
->stime
);
389 it_real_value
= task
->signal
->real_timer
.expires
;
391 ppid
= pid_alive(task
) ? task
->group_leader
->real_parent
->tgid
: 0;
392 read_unlock(&tasklist_lock
);
394 if (!whole
|| num_threads
<2)
395 wchan
= get_wchan(task
);
397 min_flt
= task
->min_flt
;
398 maj_flt
= task
->maj_flt
;
403 /* scale priority and nice values from timeslices to -20..20 */
404 /* to make it look like a "normal" Unix priority/nice value */
405 priority
= task_prio(task
);
406 nice
= task_nice(task
);
408 /* Temporary variable needed for gcc-2.96 */
409 /* convert timespec -> nsec*/
410 start_time
= (unsigned long long)task
->start_time
.tv_sec
* NSEC_PER_SEC
411 + task
->start_time
.tv_nsec
;
412 /* convert nsec -> ticks */
413 start_time
= nsec_to_clock_t(start_time
);
415 res
= sprintf(buffer
,"%d (%s) %c %d %d %d %d %d %lu %lu \
416 %lu %lu %lu %lu %lu %ld %ld %ld %ld %d %ld %llu %lu %ld %lu %lu %lu %lu %lu \
417 %lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %lu\n",
431 cputime_to_clock_t(utime
),
432 cputime_to_clock_t(stime
),
433 cputime_to_clock_t(cutime
),
434 cputime_to_clock_t(cstime
),
438 (long) ktime_to_clock_t(it_real_value
),
441 mm
? get_mm_rss(mm
) : 0,
443 mm
? mm
->start_code
: 0,
444 mm
? mm
->end_code
: 0,
445 mm
? mm
->start_stack
: 0,
448 /* The signal information here is obsolete.
449 * It must be decimal for Linux 2.0 compatibility.
450 * Use /proc/#/status for real-time signals.
452 task
->pending
.signal
.sig
[0] & 0x7fffffffUL
,
453 task
->blocked
.sig
[0] & 0x7fffffffUL
,
454 sigign
.sig
[0] & 0x7fffffffUL
,
455 sigcatch
.sig
[0] & 0x7fffffffUL
,
468 int proc_tid_stat(struct task_struct
*task
, char * buffer
)
470 return do_task_stat(task
, buffer
, 0);
473 int proc_tgid_stat(struct task_struct
*task
, char * buffer
)
475 return do_task_stat(task
, buffer
, 1);
478 int proc_pid_statm(struct task_struct
*task
, char *buffer
)
480 int size
= 0, resident
= 0, shared
= 0, text
= 0, lib
= 0, data
= 0;
481 struct mm_struct
*mm
= get_task_mm(task
);
484 size
= task_statm(mm
, &shared
, &text
, &data
, &resident
);
488 return sprintf(buffer
,"%d %d %d %d %d %d %d\n",
489 size
, resident
, shared
, text
, lib
, data
, 0);