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/sched/mm.h>
64 #include <linux/sched/numa_balancing.h>
65 #include <linux/sched/task_stack.h>
66 #include <linux/sched/task.h>
67 #include <linux/sched/cputime.h>
68 #include <linux/proc_fs.h>
69 #include <linux/ioport.h>
70 #include <linux/uaccess.h>
73 #include <linux/hugetlb.h>
74 #include <linux/pagemap.h>
75 #include <linux/swap.h>
76 #include <linux/smp.h>
77 #include <linux/signal.h>
78 #include <linux/highmem.h>
79 #include <linux/file.h>
80 #include <linux/fdtable.h>
81 #include <linux/times.h>
82 #include <linux/cpuset.h>
83 #include <linux/rcupdate.h>
84 #include <linux/delayacct.h>
85 #include <linux/seq_file.h>
86 #include <linux/pid_namespace.h>
87 #include <linux/ptrace.h>
88 #include <linux/tracehook.h>
89 #include <linux/string_helpers.h>
90 #include <linux/user_namespace.h>
91 #include <linux/fs_struct.h>
93 #include <asm/pgtable.h>
94 #include <asm/processor.h>
97 static inline void task_name(struct seq_file
*m
, struct task_struct
*p
)
101 char tcomm
[sizeof(p
->comm
)];
104 get_task_comm(tcomm
, p
);
106 seq_puts(m
, "Name:\t");
108 size
= seq_get_buf(m
, &buf
);
109 ret
= string_escape_str(tcomm
, buf
, size
, ESCAPE_SPACE
| ESCAPE_SPECIAL
, "\n\\");
110 seq_commit(m
, ret
< size
? ret
: -1);
116 * The task state array is a strange "bitmap" of
117 * reasons to sleep. Thus "running" is zero, and
118 * you can test for combinations of others with
121 static const char * const task_state_array
[] = {
123 /* states in TASK_REPORT: */
124 "R (running)", /* 0x00 */
125 "S (sleeping)", /* 0x01 */
126 "D (disk sleep)", /* 0x02 */
127 "T (stopped)", /* 0x04 */
128 "t (tracing stop)", /* 0x08 */
129 "X (dead)", /* 0x10 */
130 "Z (zombie)", /* 0x20 */
131 "P (parked)", /* 0x40 */
133 /* states beyond TASK_REPORT: */
134 "I (idle)", /* 0x80 */
137 static inline const char *get_task_state(struct task_struct
*tsk
)
139 BUILD_BUG_ON(1 + ilog2(TASK_REPORT_MAX
) != ARRAY_SIZE(task_state_array
));
140 return task_state_array
[__get_task_state(tsk
)];
143 static inline int get_task_umask(struct task_struct
*tsk
)
145 struct fs_struct
*fs
;
156 static inline void task_state(struct seq_file
*m
, struct pid_namespace
*ns
,
157 struct pid
*pid
, struct task_struct
*p
)
159 struct user_namespace
*user_ns
= seq_user_ns(m
);
160 struct group_info
*group_info
;
162 struct task_struct
*tracer
;
163 const struct cred
*cred
;
164 pid_t ppid
, tpid
= 0, tgid
, ngid
;
165 unsigned int max_fds
= 0;
168 ppid
= pid_alive(p
) ?
169 task_tgid_nr_ns(rcu_dereference(p
->real_parent
), ns
) : 0;
171 tracer
= ptrace_parent(p
);
173 tpid
= task_pid_nr_ns(tracer
, ns
);
175 tgid
= task_tgid_nr_ns(p
, ns
);
176 ngid
= task_numa_group_id(p
);
177 cred
= get_task_cred(p
);
179 umask
= get_task_umask(p
);
181 seq_printf(m
, "Umask:\t%#04o\n", umask
);
185 max_fds
= files_fdtable(p
->files
)->max_fds
;
189 seq_printf(m
, "State:\t%s", get_task_state(p
));
191 seq_put_decimal_ull(m
, "\nTgid:\t", tgid
);
192 seq_put_decimal_ull(m
, "\nNgid:\t", ngid
);
193 seq_put_decimal_ull(m
, "\nPid:\t", pid_nr_ns(pid
, ns
));
194 seq_put_decimal_ull(m
, "\nPPid:\t", ppid
);
195 seq_put_decimal_ull(m
, "\nTracerPid:\t", tpid
);
196 seq_put_decimal_ull(m
, "\nUid:\t", from_kuid_munged(user_ns
, cred
->uid
));
197 seq_put_decimal_ull(m
, "\t", from_kuid_munged(user_ns
, cred
->euid
));
198 seq_put_decimal_ull(m
, "\t", from_kuid_munged(user_ns
, cred
->suid
));
199 seq_put_decimal_ull(m
, "\t", from_kuid_munged(user_ns
, cred
->fsuid
));
200 seq_put_decimal_ull(m
, "\nGid:\t", from_kgid_munged(user_ns
, cred
->gid
));
201 seq_put_decimal_ull(m
, "\t", from_kgid_munged(user_ns
, cred
->egid
));
202 seq_put_decimal_ull(m
, "\t", from_kgid_munged(user_ns
, cred
->sgid
));
203 seq_put_decimal_ull(m
, "\t", from_kgid_munged(user_ns
, cred
->fsgid
));
204 seq_put_decimal_ull(m
, "\nFDSize:\t", max_fds
);
206 seq_puts(m
, "\nGroups:\t");
207 group_info
= cred
->group_info
;
208 for (g
= 0; g
< group_info
->ngroups
; g
++)
209 seq_put_decimal_ull(m
, g
? " " : "",
210 from_kgid_munged(user_ns
, group_info
->gid
[g
]));
212 /* Trailing space shouldn't have been added in the first place. */
216 seq_puts(m
, "\nNStgid:");
217 for (g
= ns
->level
; g
<= pid
->level
; g
++)
218 seq_put_decimal_ull(m
, "\t", task_tgid_nr_ns(p
, pid
->numbers
[g
].ns
));
219 seq_puts(m
, "\nNSpid:");
220 for (g
= ns
->level
; g
<= pid
->level
; g
++)
221 seq_put_decimal_ull(m
, "\t", task_pid_nr_ns(p
, pid
->numbers
[g
].ns
));
222 seq_puts(m
, "\nNSpgid:");
223 for (g
= ns
->level
; g
<= pid
->level
; g
++)
224 seq_put_decimal_ull(m
, "\t", task_pgrp_nr_ns(p
, pid
->numbers
[g
].ns
));
225 seq_puts(m
, "\nNSsid:");
226 for (g
= ns
->level
; g
<= pid
->level
; g
++)
227 seq_put_decimal_ull(m
, "\t", task_session_nr_ns(p
, pid
->numbers
[g
].ns
));
232 void render_sigset_t(struct seq_file
*m
, const char *header
,
244 if (sigismember(set
, i
+1)) x
|= 1;
245 if (sigismember(set
, i
+2)) x
|= 2;
246 if (sigismember(set
, i
+3)) x
|= 4;
247 if (sigismember(set
, i
+4)) x
|= 8;
248 seq_putc(m
, hex_asc
[x
]);
254 static void collect_sigign_sigcatch(struct task_struct
*p
, sigset_t
*ign
,
257 struct k_sigaction
*k
;
260 k
= p
->sighand
->action
;
261 for (i
= 1; i
<= _NSIG
; ++i
, ++k
) {
262 if (k
->sa
.sa_handler
== SIG_IGN
)
264 else if (k
->sa
.sa_handler
!= SIG_DFL
)
269 static inline void task_sig(struct seq_file
*m
, struct task_struct
*p
)
272 sigset_t pending
, shpending
, blocked
, ignored
, caught
;
274 unsigned long qsize
= 0;
275 unsigned long qlim
= 0;
277 sigemptyset(&pending
);
278 sigemptyset(&shpending
);
279 sigemptyset(&blocked
);
280 sigemptyset(&ignored
);
281 sigemptyset(&caught
);
283 if (lock_task_sighand(p
, &flags
)) {
284 pending
= p
->pending
.signal
;
285 shpending
= p
->signal
->shared_pending
.signal
;
286 blocked
= p
->blocked
;
287 collect_sigign_sigcatch(p
, &ignored
, &caught
);
288 num_threads
= get_nr_threads(p
);
289 rcu_read_lock(); /* FIXME: is this correct? */
290 qsize
= atomic_read(&__task_cred(p
)->user
->sigpending
);
292 qlim
= task_rlimit(p
, RLIMIT_SIGPENDING
);
293 unlock_task_sighand(p
, &flags
);
296 seq_put_decimal_ull(m
, "Threads:\t", num_threads
);
297 seq_put_decimal_ull(m
, "\nSigQ:\t", qsize
);
298 seq_put_decimal_ull(m
, "/", qlim
);
300 /* render them all */
301 render_sigset_t(m
, "\nSigPnd:\t", &pending
);
302 render_sigset_t(m
, "ShdPnd:\t", &shpending
);
303 render_sigset_t(m
, "SigBlk:\t", &blocked
);
304 render_sigset_t(m
, "SigIgn:\t", &ignored
);
305 render_sigset_t(m
, "SigCgt:\t", &caught
);
308 static void render_cap_t(struct seq_file
*m
, const char *header
,
314 CAP_FOR_EACH_U32(__capi
) {
315 seq_printf(m
, "%08x",
316 a
->cap
[CAP_LAST_U32
- __capi
]);
321 static inline void task_cap(struct seq_file
*m
, struct task_struct
*p
)
323 const struct cred
*cred
;
324 kernel_cap_t cap_inheritable
, cap_permitted
, cap_effective
,
325 cap_bset
, cap_ambient
;
328 cred
= __task_cred(p
);
329 cap_inheritable
= cred
->cap_inheritable
;
330 cap_permitted
= cred
->cap_permitted
;
331 cap_effective
= cred
->cap_effective
;
332 cap_bset
= cred
->cap_bset
;
333 cap_ambient
= cred
->cap_ambient
;
336 render_cap_t(m
, "CapInh:\t", &cap_inheritable
);
337 render_cap_t(m
, "CapPrm:\t", &cap_permitted
);
338 render_cap_t(m
, "CapEff:\t", &cap_effective
);
339 render_cap_t(m
, "CapBnd:\t", &cap_bset
);
340 render_cap_t(m
, "CapAmb:\t", &cap_ambient
);
343 static inline void task_seccomp(struct seq_file
*m
, struct task_struct
*p
)
345 seq_put_decimal_ull(m
, "NoNewPrivs:\t", task_no_new_privs(p
));
346 #ifdef CONFIG_SECCOMP
347 seq_put_decimal_ull(m
, "\nSeccomp:\t", p
->seccomp
.mode
);
352 static inline void task_context_switch_counts(struct seq_file
*m
,
353 struct task_struct
*p
)
355 seq_put_decimal_ull(m
, "voluntary_ctxt_switches:\t", p
->nvcsw
);
356 seq_put_decimal_ull(m
, "\nnonvoluntary_ctxt_switches:\t", p
->nivcsw
);
360 static void task_cpus_allowed(struct seq_file
*m
, struct task_struct
*task
)
362 seq_printf(m
, "Cpus_allowed:\t%*pb\n",
363 cpumask_pr_args(&task
->cpus_allowed
));
364 seq_printf(m
, "Cpus_allowed_list:\t%*pbl\n",
365 cpumask_pr_args(&task
->cpus_allowed
));
368 int proc_pid_status(struct seq_file
*m
, struct pid_namespace
*ns
,
369 struct pid
*pid
, struct task_struct
*task
)
371 struct mm_struct
*mm
= get_task_mm(task
);
374 task_state(m
, ns
, pid
, task
);
382 task_seccomp(m
, task
);
383 task_cpus_allowed(m
, task
);
384 cpuset_task_status_allowed(m
, task
);
385 task_context_switch_counts(m
, task
);
389 static int do_task_stat(struct seq_file
*m
, struct pid_namespace
*ns
,
390 struct pid
*pid
, struct task_struct
*task
, int whole
)
392 unsigned long vsize
, eip
, esp
, wchan
= 0;
394 int tty_pgrp
= -1, tty_nr
= 0;
395 sigset_t sigign
, sigcatch
;
397 pid_t ppid
= 0, pgid
= -1, sid
= -1;
400 struct mm_struct
*mm
;
401 unsigned long long start_time
;
402 unsigned long cmin_flt
= 0, cmaj_flt
= 0;
403 unsigned long min_flt
= 0, maj_flt
= 0;
404 u64 cutime
, cstime
, utime
, stime
;
406 unsigned long rsslim
= 0;
407 char tcomm
[sizeof(task
->comm
)];
410 state
= *get_task_state(task
);
411 vsize
= eip
= esp
= 0;
412 permitted
= ptrace_may_access(task
, PTRACE_MODE_READ_FSCREDS
| PTRACE_MODE_NOAUDIT
);
413 mm
= get_task_mm(task
);
415 vsize
= task_vsize(mm
);
417 * esp and eip are intentionally zeroed out. There is no
418 * non-racy way to read them without freezing the task.
419 * Programs that need reliable values can use ptrace(2).
421 * The only exception is if the task is core dumping because
422 * a program is not able to use ptrace(2) in that case. It is
423 * safe because the task has stopped executing permanently.
425 if (permitted
&& (task
->flags
& PF_DUMPCORE
)) {
426 eip
= KSTK_EIP(task
);
427 esp
= KSTK_ESP(task
);
431 get_task_comm(tcomm
, task
);
433 sigemptyset(&sigign
);
434 sigemptyset(&sigcatch
);
435 cutime
= cstime
= utime
= stime
= 0;
438 if (lock_task_sighand(task
, &flags
)) {
439 struct signal_struct
*sig
= task
->signal
;
442 struct pid
*pgrp
= tty_get_pgrp(sig
->tty
);
443 tty_pgrp
= pid_nr_ns(pgrp
, ns
);
445 tty_nr
= new_encode_dev(tty_devnum(sig
->tty
));
448 num_threads
= get_nr_threads(task
);
449 collect_sigign_sigcatch(task
, &sigign
, &sigcatch
);
451 cmin_flt
= sig
->cmin_flt
;
452 cmaj_flt
= sig
->cmaj_flt
;
453 cutime
= sig
->cutime
;
454 cstime
= sig
->cstime
;
455 cgtime
= sig
->cgtime
;
456 rsslim
= READ_ONCE(sig
->rlim
[RLIMIT_RSS
].rlim_cur
);
458 /* add up live thread stats at the group level */
460 struct task_struct
*t
= task
;
462 min_flt
+= t
->min_flt
;
463 maj_flt
+= t
->maj_flt
;
464 gtime
+= task_gtime(t
);
465 } while_each_thread(task
, t
);
467 min_flt
+= sig
->min_flt
;
468 maj_flt
+= sig
->maj_flt
;
469 thread_group_cputime_adjusted(task
, &utime
, &stime
);
473 sid
= task_session_nr_ns(task
, ns
);
474 ppid
= task_tgid_nr_ns(task
->real_parent
, ns
);
475 pgid
= task_pgrp_nr_ns(task
, ns
);
477 unlock_task_sighand(task
, &flags
);
480 if (permitted
&& (!whole
|| num_threads
< 2))
481 wchan
= get_wchan(task
);
483 min_flt
= task
->min_flt
;
484 maj_flt
= task
->maj_flt
;
485 task_cputime_adjusted(task
, &utime
, &stime
);
486 gtime
= task_gtime(task
);
489 /* scale priority and nice values from timeslices to -20..20 */
490 /* to make it look like a "normal" Unix priority/nice value */
491 priority
= task_prio(task
);
492 nice
= task_nice(task
);
494 /* convert nsec -> ticks */
495 start_time
= nsec_to_clock_t(task
->real_start_time
);
497 seq_printf(m
, "%d (%s) %c", pid_nr_ns(pid
, ns
), tcomm
, state
);
498 seq_put_decimal_ll(m
, " ", ppid
);
499 seq_put_decimal_ll(m
, " ", pgid
);
500 seq_put_decimal_ll(m
, " ", sid
);
501 seq_put_decimal_ll(m
, " ", tty_nr
);
502 seq_put_decimal_ll(m
, " ", tty_pgrp
);
503 seq_put_decimal_ull(m
, " ", task
->flags
);
504 seq_put_decimal_ull(m
, " ", min_flt
);
505 seq_put_decimal_ull(m
, " ", cmin_flt
);
506 seq_put_decimal_ull(m
, " ", maj_flt
);
507 seq_put_decimal_ull(m
, " ", cmaj_flt
);
508 seq_put_decimal_ull(m
, " ", nsec_to_clock_t(utime
));
509 seq_put_decimal_ull(m
, " ", nsec_to_clock_t(stime
));
510 seq_put_decimal_ll(m
, " ", nsec_to_clock_t(cutime
));
511 seq_put_decimal_ll(m
, " ", nsec_to_clock_t(cstime
));
512 seq_put_decimal_ll(m
, " ", priority
);
513 seq_put_decimal_ll(m
, " ", nice
);
514 seq_put_decimal_ll(m
, " ", num_threads
);
515 seq_put_decimal_ull(m
, " ", 0);
516 seq_put_decimal_ull(m
, " ", start_time
);
517 seq_put_decimal_ull(m
, " ", vsize
);
518 seq_put_decimal_ull(m
, " ", mm
? get_mm_rss(mm
) : 0);
519 seq_put_decimal_ull(m
, " ", rsslim
);
520 seq_put_decimal_ull(m
, " ", mm
? (permitted
? mm
->start_code
: 1) : 0);
521 seq_put_decimal_ull(m
, " ", mm
? (permitted
? mm
->end_code
: 1) : 0);
522 seq_put_decimal_ull(m
, " ", (permitted
&& mm
) ? mm
->start_stack
: 0);
523 seq_put_decimal_ull(m
, " ", esp
);
524 seq_put_decimal_ull(m
, " ", eip
);
525 /* The signal information here is obsolete.
526 * It must be decimal for Linux 2.0 compatibility.
527 * Use /proc/#/status for real-time signals.
529 seq_put_decimal_ull(m
, " ", task
->pending
.signal
.sig
[0] & 0x7fffffffUL
);
530 seq_put_decimal_ull(m
, " ", task
->blocked
.sig
[0] & 0x7fffffffUL
);
531 seq_put_decimal_ull(m
, " ", sigign
.sig
[0] & 0x7fffffffUL
);
532 seq_put_decimal_ull(m
, " ", sigcatch
.sig
[0] & 0x7fffffffUL
);
535 * We used to output the absolute kernel address, but that's an
536 * information leak - so instead we show a 0/1 flag here, to signal
537 * to user-space whether there's a wchan field in /proc/PID/wchan.
539 * This works with older implementations of procps as well.
546 seq_put_decimal_ull(m
, " ", 0);
547 seq_put_decimal_ull(m
, " ", 0);
548 seq_put_decimal_ll(m
, " ", task
->exit_signal
);
549 seq_put_decimal_ll(m
, " ", task_cpu(task
));
550 seq_put_decimal_ull(m
, " ", task
->rt_priority
);
551 seq_put_decimal_ull(m
, " ", task
->policy
);
552 seq_put_decimal_ull(m
, " ", delayacct_blkio_ticks(task
));
553 seq_put_decimal_ull(m
, " ", nsec_to_clock_t(gtime
));
554 seq_put_decimal_ll(m
, " ", nsec_to_clock_t(cgtime
));
556 if (mm
&& permitted
) {
557 seq_put_decimal_ull(m
, " ", mm
->start_data
);
558 seq_put_decimal_ull(m
, " ", mm
->end_data
);
559 seq_put_decimal_ull(m
, " ", mm
->start_brk
);
560 seq_put_decimal_ull(m
, " ", mm
->arg_start
);
561 seq_put_decimal_ull(m
, " ", mm
->arg_end
);
562 seq_put_decimal_ull(m
, " ", mm
->env_start
);
563 seq_put_decimal_ull(m
, " ", mm
->env_end
);
565 seq_puts(m
, " 0 0 0 0 0 0 0");
568 seq_put_decimal_ll(m
, " ", task
->exit_code
);
578 int proc_tid_stat(struct seq_file
*m
, struct pid_namespace
*ns
,
579 struct pid
*pid
, struct task_struct
*task
)
581 return do_task_stat(m
, ns
, pid
, task
, 0);
584 int proc_tgid_stat(struct seq_file
*m
, struct pid_namespace
*ns
,
585 struct pid
*pid
, struct task_struct
*task
)
587 return do_task_stat(m
, ns
, pid
, task
, 1);
590 int proc_pid_statm(struct seq_file
*m
, struct pid_namespace
*ns
,
591 struct pid
*pid
, struct task_struct
*task
)
593 unsigned long size
= 0, resident
= 0, shared
= 0, text
= 0, data
= 0;
594 struct mm_struct
*mm
= get_task_mm(task
);
597 size
= task_statm(mm
, &shared
, &text
, &data
, &resident
);
601 * For quick read, open code by putting numbers directly
603 * seq_printf(m, "%lu %lu %lu %lu 0 %lu 0\n",
604 * size, resident, shared, text, data);
606 seq_put_decimal_ull(m
, "", size
);
607 seq_put_decimal_ull(m
, " ", resident
);
608 seq_put_decimal_ull(m
, " ", shared
);
609 seq_put_decimal_ull(m
, " ", text
);
610 seq_put_decimal_ull(m
, " ", 0);
611 seq_put_decimal_ull(m
, " ", data
);
612 seq_put_decimal_ull(m
, " ", 0);
618 #ifdef CONFIG_PROC_CHILDREN
620 get_children_pid(struct inode
*inode
, struct pid
*pid_prev
, loff_t pos
)
622 struct task_struct
*start
, *task
;
623 struct pid
*pid
= NULL
;
625 read_lock(&tasklist_lock
);
627 start
= pid_task(proc_pid(inode
), PIDTYPE_PID
);
632 * Lets try to continue searching first, this gives
633 * us significant speedup on children-rich processes.
636 task
= pid_task(pid_prev
, PIDTYPE_PID
);
637 if (task
&& task
->real_parent
== start
&&
638 !(list_empty(&task
->sibling
))) {
639 if (list_is_last(&task
->sibling
, &start
->children
))
641 task
= list_first_entry(&task
->sibling
,
642 struct task_struct
, sibling
);
643 pid
= get_pid(task_pid(task
));
651 * We might miss some children here if children
652 * are exited while we were not holding the lock,
653 * but it was never promised to be accurate that
656 * "Just suppose that the parent sleeps, but N children
657 * exit after we printed their tids. Now the slow paths
658 * skips N extra children, we miss N tasks." (c)
660 * So one need to stop or freeze the leader and all
661 * its children to get a precise result.
663 list_for_each_entry(task
, &start
->children
, sibling
) {
665 pid
= get_pid(task_pid(task
));
671 read_unlock(&tasklist_lock
);
675 static int children_seq_show(struct seq_file
*seq
, void *v
)
677 struct inode
*inode
= seq
->private;
680 pid
= pid_nr_ns(v
, inode
->i_sb
->s_fs_info
);
681 seq_printf(seq
, "%d ", pid
);
686 static void *children_seq_start(struct seq_file
*seq
, loff_t
*pos
)
688 return get_children_pid(seq
->private, NULL
, *pos
);
691 static void *children_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
695 pid
= get_children_pid(seq
->private, v
, *pos
+ 1);
702 static void children_seq_stop(struct seq_file
*seq
, void *v
)
707 static const struct seq_operations children_seq_ops
= {
708 .start
= children_seq_start
,
709 .next
= children_seq_next
,
710 .stop
= children_seq_stop
,
711 .show
= children_seq_show
,
714 static int children_seq_open(struct inode
*inode
, struct file
*file
)
719 ret
= seq_open(file
, &children_seq_ops
);
723 m
= file
->private_data
;
729 int children_seq_release(struct inode
*inode
, struct file
*file
)
731 seq_release(inode
, file
);
735 const struct file_operations proc_tid_children_operations
= {
736 .open
= children_seq_open
,
739 .release
= children_seq_release
,
741 #endif /* CONFIG_PROC_CHILDREN */