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>
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/tracehook.h>
85 #include <asm/pgtable.h>
86 #include <asm/processor.h>
89 /* Gcc optimizes away "strlen(x)" for constant x */
90 #define ADDBUF(buffer, string) \
91 do { memcpy(buffer, string, strlen(string)); \
92 buffer += strlen(string); } while (0)
94 static inline void task_name(struct seq_file
*m
, struct task_struct
*p
)
99 char tcomm
[sizeof(p
->comm
)];
101 get_task_comm(tcomm
, p
);
103 seq_printf(m
, "Name:\t");
104 end
= m
->buf
+ m
->size
;
105 buf
= m
->buf
+ m
->count
;
108 while (i
&& (buf
< end
)) {
109 unsigned char c
= *name
;
129 m
->count
= buf
- m
->buf
;
134 * The task state array is a strange "bitmap" of
135 * reasons to sleep. Thus "running" is zero, and
136 * you can test for combinations of others with
139 static const char *task_state_array
[] = {
140 "R (running)", /* 0 */
141 "S (sleeping)", /* 1 */
142 "D (disk sleep)", /* 2 */
143 "T (stopped)", /* 4 */
144 "T (tracing stop)", /* 8 */
145 "Z (zombie)", /* 16 */
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];
161 static inline void task_state(struct seq_file
*m
, struct pid_namespace
*ns
,
162 struct pid
*pid
, struct task_struct
*p
)
164 struct group_info
*group_info
;
166 struct fdtable
*fdt
= NULL
;
170 ppid
= pid_alive(p
) ?
171 task_tgid_nr_ns(rcu_dereference(p
->real_parent
), ns
) : 0;
174 struct task_struct
*tracer
= tracehook_tracer_task(p
);
176 tpid
= task_pid_nr_ns(tracer
, ns
);
184 "Uid:\t%d\t%d\t%d\t%d\n"
185 "Gid:\t%d\t%d\t%d\t%d\n",
187 task_tgid_nr_ns(p
, ns
),
190 p
->uid
, p
->euid
, p
->suid
, p
->fsuid
,
191 p
->gid
, p
->egid
, p
->sgid
, p
->fsgid
);
195 fdt
= files_fdtable(p
->files
);
199 fdt
? fdt
->max_fds
: 0);
202 group_info
= p
->group_info
;
203 get_group_info(group_info
);
206 for (g
= 0; g
< min(group_info
->ngroups
, NGROUPS_SMALL
); g
++)
207 seq_printf(m
, "%d ", GROUP_AT(group_info
, g
));
208 put_group_info(group_info
);
213 static void render_sigset_t(struct seq_file
*m
, const char *header
,
218 seq_printf(m
, "%s", header
);
225 if (sigismember(set
, i
+1)) x
|= 1;
226 if (sigismember(set
, i
+2)) x
|= 2;
227 if (sigismember(set
, i
+3)) x
|= 4;
228 if (sigismember(set
, i
+4)) x
|= 8;
229 seq_printf(m
, "%x", x
);
235 static void collect_sigign_sigcatch(struct task_struct
*p
, sigset_t
*ign
,
238 struct k_sigaction
*k
;
241 k
= p
->sighand
->action
;
242 for (i
= 1; i
<= _NSIG
; ++i
, ++k
) {
243 if (k
->sa
.sa_handler
== SIG_IGN
)
245 else if (k
->sa
.sa_handler
!= SIG_DFL
)
250 static inline void task_sig(struct seq_file
*m
, struct task_struct
*p
)
253 sigset_t pending
, shpending
, blocked
, ignored
, caught
;
255 unsigned long qsize
= 0;
256 unsigned long qlim
= 0;
258 sigemptyset(&pending
);
259 sigemptyset(&shpending
);
260 sigemptyset(&blocked
);
261 sigemptyset(&ignored
);
262 sigemptyset(&caught
);
265 if (lock_task_sighand(p
, &flags
)) {
266 pending
= p
->pending
.signal
;
267 shpending
= p
->signal
->shared_pending
.signal
;
268 blocked
= p
->blocked
;
269 collect_sigign_sigcatch(p
, &ignored
, &caught
);
270 num_threads
= atomic_read(&p
->signal
->count
);
271 qsize
= atomic_read(&p
->user
->sigpending
);
272 qlim
= p
->signal
->rlim
[RLIMIT_SIGPENDING
].rlim_cur
;
273 unlock_task_sighand(p
, &flags
);
277 seq_printf(m
, "Threads:\t%d\n", num_threads
);
278 seq_printf(m
, "SigQ:\t%lu/%lu\n", qsize
, qlim
);
280 /* render them all */
281 render_sigset_t(m
, "SigPnd:\t", &pending
);
282 render_sigset_t(m
, "ShdPnd:\t", &shpending
);
283 render_sigset_t(m
, "SigBlk:\t", &blocked
);
284 render_sigset_t(m
, "SigIgn:\t", &ignored
);
285 render_sigset_t(m
, "SigCgt:\t", &caught
);
288 static void render_cap_t(struct seq_file
*m
, const char *header
,
293 seq_printf(m
, "%s", header
);
294 CAP_FOR_EACH_U32(__capi
) {
295 seq_printf(m
, "%08x",
296 a
->cap
[(_KERNEL_CAPABILITY_U32S
-1) - __capi
]);
301 static inline void task_cap(struct seq_file
*m
, struct task_struct
*p
)
303 render_cap_t(m
, "CapInh:\t", &p
->cap_inheritable
);
304 render_cap_t(m
, "CapPrm:\t", &p
->cap_permitted
);
305 render_cap_t(m
, "CapEff:\t", &p
->cap_effective
);
306 render_cap_t(m
, "CapBnd:\t", &p
->cap_bset
);
309 static inline void task_context_switch_counts(struct seq_file
*m
,
310 struct task_struct
*p
)
312 seq_printf(m
, "voluntary_ctxt_switches:\t%lu\n"
313 "nonvoluntary_ctxt_switches:\t%lu\n",
318 int proc_pid_status(struct seq_file
*m
, struct pid_namespace
*ns
,
319 struct pid
*pid
, struct task_struct
*task
)
321 struct mm_struct
*mm
= get_task_mm(task
);
324 task_state(m
, ns
, pid
, task
);
332 cpuset_task_status_allowed(m
, task
);
333 #if defined(CONFIG_S390)
334 task_show_regs(m
, task
);
336 task_context_switch_counts(m
, task
);
341 * Use precise platform statistics if available:
343 #ifdef CONFIG_VIRT_CPU_ACCOUNTING
344 static cputime_t
task_utime(struct task_struct
*p
)
349 static cputime_t
task_stime(struct task_struct
*p
)
354 static cputime_t
task_utime(struct task_struct
*p
)
356 clock_t utime
= cputime_to_clock_t(p
->utime
),
357 total
= utime
+ cputime_to_clock_t(p
->stime
);
361 * Use CFS's precise accounting:
363 temp
= (u64
)nsec_to_clock_t(p
->se
.sum_exec_runtime
);
369 utime
= (clock_t)temp
;
371 p
->prev_utime
= max(p
->prev_utime
, clock_t_to_cputime(utime
));
372 return p
->prev_utime
;
375 static cputime_t
task_stime(struct task_struct
*p
)
380 * Use CFS's precise accounting. (we subtract utime from
381 * the total, to make sure the total observed by userspace
382 * grows monotonically - apps rely on that):
384 stime
= nsec_to_clock_t(p
->se
.sum_exec_runtime
) -
385 cputime_to_clock_t(task_utime(p
));
388 p
->prev_stime
= max(p
->prev_stime
, clock_t_to_cputime(stime
));
390 return p
->prev_stime
;
394 static cputime_t
task_gtime(struct task_struct
*p
)
399 static int do_task_stat(struct seq_file
*m
, struct pid_namespace
*ns
,
400 struct pid
*pid
, struct task_struct
*task
, int whole
)
402 unsigned long vsize
, eip
, esp
, wchan
= ~0UL;
404 int tty_pgrp
= -1, tty_nr
= 0;
405 sigset_t sigign
, sigcatch
;
407 pid_t ppid
= 0, pgid
= -1, sid
= -1;
409 struct mm_struct
*mm
;
410 unsigned long long start_time
;
411 unsigned long cmin_flt
= 0, cmaj_flt
= 0;
412 unsigned long min_flt
= 0, maj_flt
= 0;
413 cputime_t cutime
, cstime
, utime
, stime
;
414 cputime_t cgtime
, gtime
;
415 unsigned long rsslim
= 0;
416 char tcomm
[sizeof(task
->comm
)];
419 state
= *get_task_state(task
);
420 vsize
= eip
= esp
= 0;
421 mm
= get_task_mm(task
);
423 vsize
= task_vsize(mm
);
424 eip
= KSTK_EIP(task
);
425 esp
= KSTK_ESP(task
);
428 get_task_comm(tcomm
, task
);
430 sigemptyset(&sigign
);
431 sigemptyset(&sigcatch
);
432 cutime
= cstime
= utime
= stime
= cputime_zero
;
433 cgtime
= gtime
= cputime_zero
;
435 if (lock_task_sighand(task
, &flags
)) {
436 struct signal_struct
*sig
= task
->signal
;
439 struct pid
*pgrp
= tty_get_pgrp(sig
->tty
);
440 tty_pgrp
= pid_nr_ns(pgrp
, ns
);
442 tty_nr
= new_encode_dev(tty_devnum(sig
->tty
));
445 num_threads
= atomic_read(&sig
->count
);
446 collect_sigign_sigcatch(task
, &sigign
, &sigcatch
);
448 cmin_flt
= sig
->cmin_flt
;
449 cmaj_flt
= sig
->cmaj_flt
;
450 cutime
= sig
->cutime
;
451 cstime
= sig
->cstime
;
452 cgtime
= sig
->cgtime
;
453 rsslim
= sig
->rlim
[RLIMIT_RSS
].rlim_cur
;
455 /* add up live thread stats at the group level */
457 struct task_struct
*t
= task
;
459 min_flt
+= t
->min_flt
;
460 maj_flt
+= t
->maj_flt
;
461 utime
= cputime_add(utime
, task_utime(t
));
462 stime
= cputime_add(stime
, task_stime(t
));
463 gtime
= cputime_add(gtime
, task_gtime(t
));
467 min_flt
+= sig
->min_flt
;
468 maj_flt
+= sig
->maj_flt
;
469 utime
= cputime_add(utime
, sig
->utime
);
470 stime
= cputime_add(stime
, sig
->stime
);
471 gtime
= cputime_add(gtime
, sig
->gtime
);
474 sid
= task_session_nr_ns(task
, ns
);
475 ppid
= task_tgid_nr_ns(task
->real_parent
, ns
);
476 pgid
= task_pgrp_nr_ns(task
, ns
);
478 unlock_task_sighand(task
, &flags
);
481 if (!whole
|| num_threads
< 2)
482 wchan
= get_wchan(task
);
484 min_flt
= task
->min_flt
;
485 maj_flt
= task
->maj_flt
;
486 utime
= task_utime(task
);
487 stime
= task_stime(task
);
488 gtime
= task_gtime(task
);
491 /* scale priority and nice values from timeslices to -20..20 */
492 /* to make it look like a "normal" Unix priority/nice value */
493 priority
= task_prio(task
);
494 nice
= task_nice(task
);
496 /* Temporary variable needed for gcc-2.96 */
497 /* convert timespec -> nsec*/
499 (unsigned long long)task
->real_start_time
.tv_sec
* NSEC_PER_SEC
500 + task
->real_start_time
.tv_nsec
;
501 /* convert nsec -> ticks */
502 start_time
= nsec_to_clock_t(start_time
);
504 seq_printf(m
, "%d (%s) %c %d %d %d %d %d %u %lu \
505 %lu %lu %lu %lu %lu %ld %ld %ld %ld %d 0 %llu %lu %ld %lu %lu %lu %lu %lu \
506 %lu %lu %lu %lu %lu %lu %lu %lu %d %d %u %u %llu %lu %ld\n",
520 cputime_to_clock_t(utime
),
521 cputime_to_clock_t(stime
),
522 cputime_to_clock_t(cutime
),
523 cputime_to_clock_t(cstime
),
529 mm
? get_mm_rss(mm
) : 0,
531 mm
? mm
->start_code
: 0,
532 mm
? mm
->end_code
: 0,
533 mm
? mm
->start_stack
: 0,
536 /* The signal information here is obsolete.
537 * It must be decimal for Linux 2.0 compatibility.
538 * Use /proc/#/status for real-time signals.
540 task
->pending
.signal
.sig
[0] & 0x7fffffffUL
,
541 task
->blocked
.sig
[0] & 0x7fffffffUL
,
542 sigign
.sig
[0] & 0x7fffffffUL
,
543 sigcatch
.sig
[0] & 0x7fffffffUL
,
551 (unsigned long long)delayacct_blkio_ticks(task
),
552 cputime_to_clock_t(gtime
),
553 cputime_to_clock_t(cgtime
));
559 int proc_tid_stat(struct seq_file
*m
, struct pid_namespace
*ns
,
560 struct pid
*pid
, struct task_struct
*task
)
562 return do_task_stat(m
, ns
, pid
, task
, 0);
565 int proc_tgid_stat(struct seq_file
*m
, struct pid_namespace
*ns
,
566 struct pid
*pid
, struct task_struct
*task
)
568 return do_task_stat(m
, ns
, pid
, task
, 1);
571 int proc_pid_statm(struct seq_file
*m
, struct pid_namespace
*ns
,
572 struct pid
*pid
, struct task_struct
*task
)
574 int size
= 0, resident
= 0, shared
= 0, text
= 0, lib
= 0, data
= 0;
575 struct mm_struct
*mm
= get_task_mm(task
);
578 size
= task_statm(mm
, &shared
, &text
, &data
, &resident
);
581 seq_printf(m
, "%d %d %d %d %d %d %d\n",
582 size
, resident
, shared
, text
, lib
, data
, 0);
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