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@lxorguk.ukuu.org.uk>
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>
65 #include <linux/uaccess.h>
68 #include <linux/hugetlb.h>
69 #include <linux/pagemap.h>
70 #include <linux/swap.h>
71 #include <linux/slab.h>
72 #include <linux/smp.h>
73 #include <linux/signal.h>
74 #include <linux/highmem.h>
75 #include <linux/file.h>
76 #include <linux/fdtable.h>
77 #include <linux/times.h>
78 #include <linux/cpuset.h>
79 #include <linux/rcupdate.h>
80 #include <linux/delayacct.h>
81 #include <linux/seq_file.h>
82 #include <linux/pid_namespace.h>
83 #include <linux/ptrace.h>
84 #include <linux/tracehook.h>
85 #include <linux/swapops.h>
87 #include <asm/pgtable.h>
88 #include <asm/processor.h>
91 static inline void task_name(struct seq_file
*m
, struct task_struct
*p
)
96 char tcomm
[sizeof(p
->comm
)];
98 get_task_comm(tcomm
, p
);
100 seq_printf(m
, "Name:\t");
101 end
= m
->buf
+ m
->size
;
102 buf
= m
->buf
+ m
->count
;
105 while (i
&& (buf
< end
)) {
106 unsigned char c
= *name
;
126 m
->count
= buf
- m
->buf
;
131 * The task state array is a strange "bitmap" of
132 * reasons to sleep. Thus "running" is zero, and
133 * you can test for combinations of others with
136 static const char *task_state_array
[] = {
137 "R (running)", /* 0 */
138 "S (sleeping)", /* 1 */
139 "D (disk sleep)", /* 2 */
140 "T (stopped)", /* 4 */
141 "t (tracing stop)", /* 8 */
142 "Z (zombie)", /* 16 */
145 "K (wakekill)", /* 128 */
146 "W (waking)", /* 256 */
149 static inline const char *get_task_state(struct task_struct
*tsk
)
151 unsigned int state
= (tsk
->state
& TASK_REPORT
) | tsk
->exit_state
;
152 const char **p
= &task_state_array
[0];
154 BUILD_BUG_ON(1 + ilog2(TASK_STATE_MAX
) != ARRAY_SIZE(task_state_array
));
163 static inline void task_state(struct seq_file
*m
, struct pid_namespace
*ns
,
164 struct pid
*pid
, struct task_struct
*p
)
166 struct group_info
*group_info
;
168 struct fdtable
*fdt
= NULL
;
169 const struct cred
*cred
;
173 ppid
= pid_alive(p
) ?
174 task_tgid_nr_ns(rcu_dereference(p
->real_parent
), ns
) : 0;
177 struct task_struct
*tracer
= tracehook_tracer_task(p
);
179 tpid
= task_pid_nr_ns(tracer
, ns
);
181 cred
= get_cred((struct cred
*) __task_cred(p
));
188 "Uid:\t%d\t%d\t%d\t%d\n"
189 "Gid:\t%d\t%d\t%d\t%d\n",
191 task_tgid_nr_ns(p
, ns
),
194 cred
->uid
, cred
->euid
, cred
->suid
, cred
->fsuid
,
195 cred
->gid
, cred
->egid
, cred
->sgid
, cred
->fsgid
);
199 fdt
= files_fdtable(p
->files
);
203 fdt
? fdt
->max_fds
: 0);
206 group_info
= cred
->group_info
;
209 for (g
= 0; g
< min(group_info
->ngroups
, NGROUPS_SMALL
); g
++)
210 seq_printf(m
, "%d ", GROUP_AT(group_info
, g
));
216 static void render_sigset_t(struct seq_file
*m
, const char *header
,
221 seq_printf(m
, "%s", header
);
228 if (sigismember(set
, i
+1)) x
|= 1;
229 if (sigismember(set
, i
+2)) x
|= 2;
230 if (sigismember(set
, i
+3)) x
|= 4;
231 if (sigismember(set
, i
+4)) x
|= 8;
232 seq_printf(m
, "%x", x
);
238 static void collect_sigign_sigcatch(struct task_struct
*p
, sigset_t
*ign
,
241 struct k_sigaction
*k
;
244 k
= p
->sighand
->action
;
245 for (i
= 1; i
<= _NSIG
; ++i
, ++k
) {
246 if (k
->sa
.sa_handler
== SIG_IGN
)
248 else if (k
->sa
.sa_handler
!= SIG_DFL
)
253 static inline void task_sig(struct seq_file
*m
, struct task_struct
*p
)
256 sigset_t pending
, shpending
, blocked
, ignored
, caught
;
258 unsigned long qsize
= 0;
259 unsigned long qlim
= 0;
261 sigemptyset(&pending
);
262 sigemptyset(&shpending
);
263 sigemptyset(&blocked
);
264 sigemptyset(&ignored
);
265 sigemptyset(&caught
);
267 if (lock_task_sighand(p
, &flags
)) {
268 pending
= p
->pending
.signal
;
269 shpending
= p
->signal
->shared_pending
.signal
;
270 blocked
= p
->blocked
;
271 collect_sigign_sigcatch(p
, &ignored
, &caught
);
272 num_threads
= atomic_read(&p
->signal
->count
);
273 rcu_read_lock(); /* FIXME: is this correct? */
274 qsize
= atomic_read(&__task_cred(p
)->user
->sigpending
);
276 qlim
= p
->signal
->rlim
[RLIMIT_SIGPENDING
].rlim_cur
;
277 unlock_task_sighand(p
, &flags
);
280 seq_printf(m
, "Threads:\t%d\n", num_threads
);
281 seq_printf(m
, "SigQ:\t%lu/%lu\n", qsize
, qlim
);
283 /* render them all */
284 render_sigset_t(m
, "SigPnd:\t", &pending
);
285 render_sigset_t(m
, "ShdPnd:\t", &shpending
);
286 render_sigset_t(m
, "SigBlk:\t", &blocked
);
287 render_sigset_t(m
, "SigIgn:\t", &ignored
);
288 render_sigset_t(m
, "SigCgt:\t", &caught
);
291 static void render_cap_t(struct seq_file
*m
, const char *header
,
296 seq_printf(m
, "%s", header
);
297 CAP_FOR_EACH_U32(__capi
) {
298 seq_printf(m
, "%08x",
299 a
->cap
[(_KERNEL_CAPABILITY_U32S
-1) - __capi
]);
304 static inline void task_cap(struct seq_file
*m
, struct task_struct
*p
)
306 const struct cred
*cred
;
307 kernel_cap_t cap_inheritable
, cap_permitted
, cap_effective
, cap_bset
;
310 cred
= __task_cred(p
);
311 cap_inheritable
= cred
->cap_inheritable
;
312 cap_permitted
= cred
->cap_permitted
;
313 cap_effective
= cred
->cap_effective
;
314 cap_bset
= cred
->cap_bset
;
317 render_cap_t(m
, "CapInh:\t", &cap_inheritable
);
318 render_cap_t(m
, "CapPrm:\t", &cap_permitted
);
319 render_cap_t(m
, "CapEff:\t", &cap_effective
);
320 render_cap_t(m
, "CapBnd:\t", &cap_bset
);
323 static inline void task_context_switch_counts(struct seq_file
*m
,
324 struct task_struct
*p
)
326 seq_printf(m
, "voluntary_ctxt_switches:\t%lu\n"
327 "nonvoluntary_ctxt_switches:\t%lu\n",
332 static void task_cpus_allowed(struct seq_file
*m
, struct task_struct
*task
)
334 seq_printf(m
, "Cpus_allowed:\t");
335 seq_cpumask(m
, &task
->cpus_allowed
);
337 seq_printf(m
, "Cpus_allowed_list:\t");
338 seq_cpumask_list(m
, &task
->cpus_allowed
);
342 int proc_pid_status(struct seq_file
*m
, struct pid_namespace
*ns
,
343 struct pid
*pid
, struct task_struct
*task
)
345 struct mm_struct
*mm
= get_task_mm(task
);
348 task_state(m
, ns
, pid
, task
);
356 task_cpus_allowed(m
, task
);
357 cpuset_task_status_allowed(m
, task
);
358 #if defined(CONFIG_S390)
359 task_show_regs(m
, task
);
361 task_context_switch_counts(m
, task
);
365 static int do_task_stat(struct seq_file
*m
, struct pid_namespace
*ns
,
366 struct pid
*pid
, struct task_struct
*task
, int whole
)
368 unsigned long vsize
, eip
, esp
, wchan
= ~0UL;
370 int tty_pgrp
= -1, tty_nr
= 0;
371 sigset_t sigign
, sigcatch
;
373 pid_t ppid
= 0, pgid
= -1, sid
= -1;
376 struct mm_struct
*mm
;
377 unsigned long long start_time
;
378 unsigned long cmin_flt
= 0, cmaj_flt
= 0;
379 unsigned long min_flt
= 0, maj_flt
= 0;
380 cputime_t cutime
, cstime
, utime
, stime
;
381 cputime_t cgtime
, gtime
;
382 unsigned long rsslim
= 0;
383 char tcomm
[sizeof(task
->comm
)];
386 state
= *get_task_state(task
);
387 vsize
= eip
= esp
= 0;
388 permitted
= ptrace_may_access(task
, PTRACE_MODE_READ
);
389 mm
= get_task_mm(task
);
391 vsize
= task_vsize(mm
);
393 eip
= KSTK_EIP(task
);
394 esp
= KSTK_ESP(task
);
398 get_task_comm(tcomm
, task
);
400 sigemptyset(&sigign
);
401 sigemptyset(&sigcatch
);
402 cutime
= cstime
= utime
= stime
= cputime_zero
;
403 cgtime
= gtime
= cputime_zero
;
405 if (lock_task_sighand(task
, &flags
)) {
406 struct signal_struct
*sig
= task
->signal
;
409 struct pid
*pgrp
= tty_get_pgrp(sig
->tty
);
410 tty_pgrp
= pid_nr_ns(pgrp
, ns
);
412 tty_nr
= new_encode_dev(tty_devnum(sig
->tty
));
415 num_threads
= atomic_read(&sig
->count
);
416 collect_sigign_sigcatch(task
, &sigign
, &sigcatch
);
418 cmin_flt
= sig
->cmin_flt
;
419 cmaj_flt
= sig
->cmaj_flt
;
420 cutime
= sig
->cutime
;
421 cstime
= sig
->cstime
;
422 cgtime
= sig
->cgtime
;
423 rsslim
= sig
->rlim
[RLIMIT_RSS
].rlim_cur
;
425 /* add up live thread stats at the group level */
427 struct task_struct
*t
= task
;
429 min_flt
+= t
->min_flt
;
430 maj_flt
+= t
->maj_flt
;
431 gtime
= cputime_add(gtime
, t
->gtime
);
435 min_flt
+= sig
->min_flt
;
436 maj_flt
+= sig
->maj_flt
;
437 thread_group_times(task
, &utime
, &stime
);
438 gtime
= cputime_add(gtime
, sig
->gtime
);
441 sid
= task_session_nr_ns(task
, ns
);
442 ppid
= task_tgid_nr_ns(task
->real_parent
, ns
);
443 pgid
= task_pgrp_nr_ns(task
, ns
);
445 unlock_task_sighand(task
, &flags
);
448 if (permitted
&& (!whole
|| num_threads
< 2))
449 wchan
= get_wchan(task
);
451 min_flt
= task
->min_flt
;
452 maj_flt
= task
->maj_flt
;
453 task_times(task
, &utime
, &stime
);
457 /* scale priority and nice values from timeslices to -20..20 */
458 /* to make it look like a "normal" Unix priority/nice value */
459 priority
= task_prio(task
);
460 nice
= task_nice(task
);
462 /* Temporary variable needed for gcc-2.96 */
463 /* convert timespec -> nsec*/
465 (unsigned long long)task
->real_start_time
.tv_sec
* NSEC_PER_SEC
466 + task
->real_start_time
.tv_nsec
;
467 /* convert nsec -> ticks */
468 start_time
= nsec_to_clock_t(start_time
);
470 seq_printf(m
, "%d (%s) %c %d %d %d %d %d %u %lu \
471 %lu %lu %lu %lu %lu %ld %ld %ld %ld %d 0 %llu %lu %ld %lu %lu %lu %lu %lu \
472 %lu %lu %lu %lu %lu %lu %lu %lu %d %d %u %u %llu %lu %ld\n",
486 cputime_to_clock_t(utime
),
487 cputime_to_clock_t(stime
),
488 cputime_to_clock_t(cutime
),
489 cputime_to_clock_t(cstime
),
495 mm
? get_mm_rss(mm
) : 0,
497 mm
? mm
->start_code
: 0,
498 mm
? mm
->end_code
: 0,
499 (permitted
&& mm
) ? task
->stack_start
: 0,
502 /* The signal information here is obsolete.
503 * It must be decimal for Linux 2.0 compatibility.
504 * Use /proc/#/status for real-time signals.
506 task
->pending
.signal
.sig
[0] & 0x7fffffffUL
,
507 task
->blocked
.sig
[0] & 0x7fffffffUL
,
508 sigign
.sig
[0] & 0x7fffffffUL
,
509 sigcatch
.sig
[0] & 0x7fffffffUL
,
517 (unsigned long long)delayacct_blkio_ticks(task
),
518 cputime_to_clock_t(gtime
),
519 cputime_to_clock_t(cgtime
));
525 int proc_tid_stat(struct seq_file
*m
, struct pid_namespace
*ns
,
526 struct pid
*pid
, struct task_struct
*task
)
528 return do_task_stat(m
, ns
, pid
, task
, 0);
531 int proc_tgid_stat(struct seq_file
*m
, struct pid_namespace
*ns
,
532 struct pid
*pid
, struct task_struct
*task
)
534 return do_task_stat(m
, ns
, pid
, task
, 1);
537 int proc_pid_statm(struct seq_file
*m
, struct pid_namespace
*ns
,
538 struct pid
*pid
, struct task_struct
*task
)
540 int size
= 0, resident
= 0, shared
= 0, text
= 0, lib
= 0, data
= 0;
541 struct mm_struct
*mm
= get_task_mm(task
);
544 size
= task_statm(mm
, &shared
, &text
, &data
, &resident
);
547 seq_printf(m
, "%d %d %d %d %d %d %d\n",
548 size
, resident
, shared
, text
, lib
, data
, 0);