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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 static inline void task_name(struct seq_file
*m
, struct task_struct
*p
)
94 char tcomm
[sizeof(p
->comm
)];
96 get_task_comm(tcomm
, p
);
98 seq_printf(m
, "Name:\t");
99 end
= m
->buf
+ m
->size
;
100 buf
= m
->buf
+ m
->count
;
103 while (i
&& (buf
< end
)) {
104 unsigned char c
= *name
;
124 m
->count
= buf
- m
->buf
;
129 * The task state array is a strange "bitmap" of
130 * reasons to sleep. Thus "running" is zero, and
131 * you can test for combinations of others with
134 static const char *task_state_array
[] = {
135 "R (running)", /* 0 */
136 "S (sleeping)", /* 1 */
137 "D (disk sleep)", /* 2 */
138 "T (stopped)", /* 4 */
139 "T (tracing stop)", /* 8 */
140 "Z (zombie)", /* 16 */
144 static inline const char *get_task_state(struct task_struct
*tsk
)
146 unsigned int state
= (tsk
->state
& TASK_REPORT
) | tsk
->exit_state
;
147 const char **p
= &task_state_array
[0];
156 static inline void task_state(struct seq_file
*m
, struct pid_namespace
*ns
,
157 struct pid
*pid
, struct task_struct
*p
)
159 struct group_info
*group_info
;
161 struct fdtable
*fdt
= NULL
;
165 ppid
= pid_alive(p
) ?
166 task_tgid_nr_ns(rcu_dereference(p
->real_parent
), ns
) : 0;
169 struct task_struct
*tracer
= tracehook_tracer_task(p
);
171 tpid
= task_pid_nr_ns(tracer
, ns
);
179 "Uid:\t%d\t%d\t%d\t%d\n"
180 "Gid:\t%d\t%d\t%d\t%d\n",
182 task_tgid_nr_ns(p
, ns
),
185 p
->uid
, p
->euid
, p
->suid
, p
->fsuid
,
186 p
->gid
, p
->egid
, p
->sgid
, p
->fsgid
);
190 fdt
= files_fdtable(p
->files
);
194 fdt
? fdt
->max_fds
: 0);
197 group_info
= p
->group_info
;
198 get_group_info(group_info
);
201 for (g
= 0; g
< min(group_info
->ngroups
, NGROUPS_SMALL
); g
++)
202 seq_printf(m
, "%d ", GROUP_AT(group_info
, g
));
203 put_group_info(group_info
);
208 static void render_sigset_t(struct seq_file
*m
, const char *header
,
213 seq_printf(m
, "%s", header
);
220 if (sigismember(set
, i
+1)) x
|= 1;
221 if (sigismember(set
, i
+2)) x
|= 2;
222 if (sigismember(set
, i
+3)) x
|= 4;
223 if (sigismember(set
, i
+4)) x
|= 8;
224 seq_printf(m
, "%x", 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 void task_sig(struct seq_file
*m
, struct task_struct
*p
)
248 sigset_t pending
, shpending
, blocked
, ignored
, caught
;
250 unsigned long qsize
= 0;
251 unsigned long qlim
= 0;
253 sigemptyset(&pending
);
254 sigemptyset(&shpending
);
255 sigemptyset(&blocked
);
256 sigemptyset(&ignored
);
257 sigemptyset(&caught
);
259 if (lock_task_sighand(p
, &flags
)) {
260 pending
= p
->pending
.signal
;
261 shpending
= p
->signal
->shared_pending
.signal
;
262 blocked
= p
->blocked
;
263 collect_sigign_sigcatch(p
, &ignored
, &caught
);
264 num_threads
= atomic_read(&p
->signal
->count
);
265 qsize
= atomic_read(&p
->user
->sigpending
);
266 qlim
= p
->signal
->rlim
[RLIMIT_SIGPENDING
].rlim_cur
;
267 unlock_task_sighand(p
, &flags
);
270 seq_printf(m
, "Threads:\t%d\n", num_threads
);
271 seq_printf(m
, "SigQ:\t%lu/%lu\n", qsize
, qlim
);
273 /* render them all */
274 render_sigset_t(m
, "SigPnd:\t", &pending
);
275 render_sigset_t(m
, "ShdPnd:\t", &shpending
);
276 render_sigset_t(m
, "SigBlk:\t", &blocked
);
277 render_sigset_t(m
, "SigIgn:\t", &ignored
);
278 render_sigset_t(m
, "SigCgt:\t", &caught
);
281 static void render_cap_t(struct seq_file
*m
, const char *header
,
286 seq_printf(m
, "%s", header
);
287 CAP_FOR_EACH_U32(__capi
) {
288 seq_printf(m
, "%08x",
289 a
->cap
[(_KERNEL_CAPABILITY_U32S
-1) - __capi
]);
294 static inline void task_cap(struct seq_file
*m
, struct task_struct
*p
)
296 render_cap_t(m
, "CapInh:\t", &p
->cap_inheritable
);
297 render_cap_t(m
, "CapPrm:\t", &p
->cap_permitted
);
298 render_cap_t(m
, "CapEff:\t", &p
->cap_effective
);
299 render_cap_t(m
, "CapBnd:\t", &p
->cap_bset
);
302 static inline void task_context_switch_counts(struct seq_file
*m
,
303 struct task_struct
*p
)
305 seq_printf(m
, "voluntary_ctxt_switches:\t%lu\n"
306 "nonvoluntary_ctxt_switches:\t%lu\n",
311 int proc_pid_status(struct seq_file
*m
, struct pid_namespace
*ns
,
312 struct pid
*pid
, struct task_struct
*task
)
314 struct mm_struct
*mm
= get_task_mm(task
);
317 task_state(m
, ns
, pid
, task
);
325 cpuset_task_status_allowed(m
, task
);
326 #if defined(CONFIG_S390)
327 task_show_regs(m
, task
);
329 task_context_switch_counts(m
, task
);
333 static int do_task_stat(struct seq_file
*m
, struct pid_namespace
*ns
,
334 struct pid
*pid
, struct task_struct
*task
, int whole
)
336 unsigned long vsize
, eip
, esp
, wchan
= ~0UL;
338 int tty_pgrp
= -1, tty_nr
= 0;
339 sigset_t sigign
, sigcatch
;
341 pid_t ppid
= 0, pgid
= -1, sid
= -1;
343 struct mm_struct
*mm
;
344 unsigned long long start_time
;
345 unsigned long cmin_flt
= 0, cmaj_flt
= 0;
346 unsigned long min_flt
= 0, maj_flt
= 0;
347 cputime_t cutime
, cstime
, utime
, stime
;
348 cputime_t cgtime
, gtime
;
349 unsigned long rsslim
= 0;
350 char tcomm
[sizeof(task
->comm
)];
353 state
= *get_task_state(task
);
354 vsize
= eip
= esp
= 0;
355 mm
= get_task_mm(task
);
357 vsize
= task_vsize(mm
);
358 eip
= KSTK_EIP(task
);
359 esp
= KSTK_ESP(task
);
362 get_task_comm(tcomm
, task
);
364 sigemptyset(&sigign
);
365 sigemptyset(&sigcatch
);
366 cutime
= cstime
= utime
= stime
= cputime_zero
;
367 cgtime
= gtime
= cputime_zero
;
369 if (lock_task_sighand(task
, &flags
)) {
370 struct signal_struct
*sig
= task
->signal
;
373 struct pid
*pgrp
= tty_get_pgrp(sig
->tty
);
374 tty_pgrp
= pid_nr_ns(pgrp
, ns
);
376 tty_nr
= new_encode_dev(tty_devnum(sig
->tty
));
379 num_threads
= atomic_read(&sig
->count
);
380 collect_sigign_sigcatch(task
, &sigign
, &sigcatch
);
382 cmin_flt
= sig
->cmin_flt
;
383 cmaj_flt
= sig
->cmaj_flt
;
384 cutime
= sig
->cutime
;
385 cstime
= sig
->cstime
;
386 cgtime
= sig
->cgtime
;
387 rsslim
= sig
->rlim
[RLIMIT_RSS
].rlim_cur
;
389 /* add up live thread stats at the group level */
391 struct task_struct
*t
= task
;
393 min_flt
+= t
->min_flt
;
394 maj_flt
+= t
->maj_flt
;
395 utime
= cputime_add(utime
, task_utime(t
));
396 stime
= cputime_add(stime
, task_stime(t
));
397 gtime
= cputime_add(gtime
, task_gtime(t
));
401 min_flt
+= sig
->min_flt
;
402 maj_flt
+= sig
->maj_flt
;
403 utime
= cputime_add(utime
, sig
->utime
);
404 stime
= cputime_add(stime
, sig
->stime
);
405 gtime
= cputime_add(gtime
, sig
->gtime
);
408 sid
= task_session_nr_ns(task
, ns
);
409 ppid
= task_tgid_nr_ns(task
->real_parent
, ns
);
410 pgid
= task_pgrp_nr_ns(task
, ns
);
412 unlock_task_sighand(task
, &flags
);
415 if (!whole
|| num_threads
< 2)
416 wchan
= get_wchan(task
);
418 min_flt
= task
->min_flt
;
419 maj_flt
= task
->maj_flt
;
420 utime
= task_utime(task
);
421 stime
= task_stime(task
);
422 gtime
= task_gtime(task
);
425 /* scale priority and nice values from timeslices to -20..20 */
426 /* to make it look like a "normal" Unix priority/nice value */
427 priority
= task_prio(task
);
428 nice
= task_nice(task
);
430 /* Temporary variable needed for gcc-2.96 */
431 /* convert timespec -> nsec*/
433 (unsigned long long)task
->real_start_time
.tv_sec
* NSEC_PER_SEC
434 + task
->real_start_time
.tv_nsec
;
435 /* convert nsec -> ticks */
436 start_time
= nsec_to_clock_t(start_time
);
438 seq_printf(m
, "%d (%s) %c %d %d %d %d %d %u %lu \
439 %lu %lu %lu %lu %lu %ld %ld %ld %ld %d 0 %llu %lu %ld %lu %lu %lu %lu %lu \
440 %lu %lu %lu %lu %lu %lu %lu %lu %d %d %u %u %llu %lu %ld\n",
454 cputime_to_clock_t(utime
),
455 cputime_to_clock_t(stime
),
456 cputime_to_clock_t(cutime
),
457 cputime_to_clock_t(cstime
),
463 mm
? get_mm_rss(mm
) : 0,
465 mm
? mm
->start_code
: 0,
466 mm
? mm
->end_code
: 0,
467 mm
? mm
->start_stack
: 0,
470 /* The signal information here is obsolete.
471 * It must be decimal for Linux 2.0 compatibility.
472 * Use /proc/#/status for real-time signals.
474 task
->pending
.signal
.sig
[0] & 0x7fffffffUL
,
475 task
->blocked
.sig
[0] & 0x7fffffffUL
,
476 sigign
.sig
[0] & 0x7fffffffUL
,
477 sigcatch
.sig
[0] & 0x7fffffffUL
,
485 (unsigned long long)delayacct_blkio_ticks(task
),
486 cputime_to_clock_t(gtime
),
487 cputime_to_clock_t(cgtime
));
493 int proc_tid_stat(struct seq_file
*m
, struct pid_namespace
*ns
,
494 struct pid
*pid
, struct task_struct
*task
)
496 return do_task_stat(m
, ns
, pid
, task
, 0);
499 int proc_tgid_stat(struct seq_file
*m
, struct pid_namespace
*ns
,
500 struct pid
*pid
, struct task_struct
*task
)
502 return do_task_stat(m
, ns
, pid
, task
, 1);
505 int proc_pid_statm(struct seq_file
*m
, struct pid_namespace
*ns
,
506 struct pid
*pid
, struct task_struct
*task
)
508 int size
= 0, resident
= 0, shared
= 0, text
= 0, lib
= 0, data
= 0;
509 struct mm_struct
*mm
= get_task_mm(task
);
512 size
= task_statm(mm
, &shared
, &text
, &data
, &resident
);
515 seq_printf(m
, "%d %d %d %d %d %d %d\n",
516 size
, resident
, shared
, text
, lib
, data
, 0);