1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
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>
66#include <linux/io.h>
67#include <linux/mm.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>
84
85#include <asm/pgtable.h>
86#include <asm/processor.h>
87#include "internal.h"
88
89static inline void task_name(struct seq_file *m, struct task_struct *p)
90{
91 int i;
92 char *buf, *end;
93 char *name;
94 char tcomm[sizeof(p->comm)];
95
96 get_task_comm(tcomm, p);
97
98 seq_printf(m, "Name:\t");
99 end = m->buf + m->size;
100 buf = m->buf + m->count;
101 name = tcomm;
102 i = sizeof(tcomm);
103 while (i && (buf < end)) {
104 unsigned char c = *name;
105 name++;
106 i--;
107 *buf = c;
108 if (!c)
109 break;
110 if (c == '\\') {
111 buf++;
112 if (buf < end)
113 *buf++ = c;
114 continue;
115 }
116 if (c == '\n') {
117 *buf++ = '\\';
118 if (buf < end)
119 *buf++ = 'n';
120 continue;
121 }
122 buf++;
123 }
124 m->count = buf - m->buf;
125 seq_printf(m, "\n");
126}
127
128
129
130
131
132
133
134static const char *task_state_array[] = {
135 "R (running)",
136 "S (sleeping)",
137 "D (disk sleep)",
138 "T (stopped)",
139 "T (tracing stop)",
140 "Z (zombie)",
141 "X (dead)"
142};
143
144static inline const char *get_task_state(struct task_struct *tsk)
145{
146 unsigned int state = (tsk->state & TASK_REPORT) | tsk->exit_state;
147 const char **p = &task_state_array[0];
148
149 while (state) {
150 p++;
151 state >>= 1;
152 }
153 return *p;
154}
155
156static inline void task_state(struct seq_file *m, struct pid_namespace *ns,
157 struct pid *pid, struct task_struct *p)
158{
159 struct group_info *group_info;
160 int g;
161 struct fdtable *fdt = NULL;
162 pid_t ppid, tpid;
163
164 rcu_read_lock();
165 ppid = pid_alive(p) ?
166 task_tgid_nr_ns(rcu_dereference(p->real_parent), ns) : 0;
167 tpid = 0;
168 if (pid_alive(p)) {
169 struct task_struct *tracer = tracehook_tracer_task(p);
170 if (tracer)
171 tpid = task_pid_nr_ns(tracer, ns);
172 }
173 seq_printf(m,
174 "State:\t%s\n"
175 "Tgid:\t%d\n"
176 "Pid:\t%d\n"
177 "PPid:\t%d\n"
178 "TracerPid:\t%d\n"
179 "Uid:\t%d\t%d\t%d\t%d\n"
180 "Gid:\t%d\t%d\t%d\t%d\n",
181 get_task_state(p),
182 task_tgid_nr_ns(p, ns),
183 pid_nr_ns(pid, ns),
184 ppid, tpid,
185 p->uid, p->euid, p->suid, p->fsuid,
186 p->gid, p->egid, p->sgid, p->fsgid);
187
188 task_lock(p);
189 if (p->files)
190 fdt = files_fdtable(p->files);
191 seq_printf(m,
192 "FDSize:\t%d\n"
193 "Groups:\t",
194 fdt ? fdt->max_fds : 0);
195 rcu_read_unlock();
196
197 group_info = p->group_info;
198 get_group_info(group_info);
199 task_unlock(p);
200
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);
204
205 seq_printf(m, "\n");
206}
207
208static void render_sigset_t(struct seq_file *m, const char *header,
209 sigset_t *set)
210{
211 int i;
212
213 seq_printf(m, "%s", header);
214
215 i = _NSIG;
216 do {
217 int x = 0;
218
219 i -= 4;
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);
225 } while (i >= 4);
226
227 seq_printf(m, "\n");
228}
229
230static void collect_sigign_sigcatch(struct task_struct *p, sigset_t *ign,
231 sigset_t *catch)
232{
233 struct k_sigaction *k;
234 int i;
235
236 k = p->sighand->action;
237 for (i = 1; i <= _NSIG; ++i, ++k) {
238 if (k->sa.sa_handler == SIG_IGN)
239 sigaddset(ign, i);
240 else if (k->sa.sa_handler != SIG_DFL)
241 sigaddset(catch, i);
242 }
243}
244
245static inline void task_sig(struct seq_file *m, struct task_struct *p)
246{
247 unsigned long flags;
248 sigset_t pending, shpending, blocked, ignored, caught;
249 int num_threads = 0;
250 unsigned long qsize = 0;
251 unsigned long qlim = 0;
252
253 sigemptyset(&pending);
254 sigemptyset(&shpending);
255 sigemptyset(&blocked);
256 sigemptyset(&ignored);
257 sigemptyset(&caught);
258
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);
268 }
269
270 seq_printf(m, "Threads:\t%d\n", num_threads);
271 seq_printf(m, "SigQ:\t%lu/%lu\n", qsize, qlim);
272
273
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);
279}
280
281static void render_cap_t(struct seq_file *m, const char *header,
282 kernel_cap_t *a)
283{
284 unsigned __capi;
285
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]);
290 }
291 seq_printf(m, "\n");
292}
293
294static inline void task_cap(struct seq_file *m, struct task_struct *p)
295{
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);
300}
301
302static inline void task_context_switch_counts(struct seq_file *m,
303 struct task_struct *p)
304{
305 seq_printf(m, "voluntary_ctxt_switches:\t%lu\n"
306 "nonvoluntary_ctxt_switches:\t%lu\n",
307 p->nvcsw,
308 p->nivcsw);
309}
310
311int proc_pid_status(struct seq_file *m, struct pid_namespace *ns,
312 struct pid *pid, struct task_struct *task)
313{
314 struct mm_struct *mm = get_task_mm(task);
315
316 task_name(m, task);
317 task_state(m, ns, pid, task);
318
319 if (mm) {
320 task_mem(m, mm);
321 mmput(mm);
322 }
323 task_sig(m, task);
324 task_cap(m, task);
325 cpuset_task_status_allowed(m, task);
326#if defined(CONFIG_S390)
327 task_show_regs(m, task);
328#endif
329 task_context_switch_counts(m, task);
330 return 0;
331}
332
333static int do_task_stat(struct seq_file *m, struct pid_namespace *ns,
334 struct pid *pid, struct task_struct *task, int whole)
335{
336 unsigned long vsize, eip, esp, wchan = ~0UL;
337 long priority, nice;
338 int tty_pgrp = -1, tty_nr = 0;
339 sigset_t sigign, sigcatch;
340 char state;
341 pid_t ppid = 0, pgid = -1, sid = -1;
342 int num_threads = 0;
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)];
351 unsigned long flags;
352
353 state = *get_task_state(task);
354 vsize = eip = esp = 0;
355 mm = get_task_mm(task);
356 if (mm) {
357 vsize = task_vsize(mm);
358 eip = KSTK_EIP(task);
359 esp = KSTK_ESP(task);
360 }
361
362 get_task_comm(tcomm, task);
363
364 sigemptyset(&sigign);
365 sigemptyset(&sigcatch);
366 cutime = cstime = utime = stime = cputime_zero;
367 cgtime = gtime = cputime_zero;
368
369 if (lock_task_sighand(task, &flags)) {
370 struct signal_struct *sig = task->signal;
371
372 if (sig->tty) {
373 struct pid *pgrp = tty_get_pgrp(sig->tty);
374 tty_pgrp = pid_nr_ns(pgrp, ns);
375 put_pid(pgrp);
376 tty_nr = new_encode_dev(tty_devnum(sig->tty));
377 }
378
379 num_threads = atomic_read(&sig->count);
380 collect_sigign_sigcatch(task, &sigign, &sigcatch);
381
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;
388
389
390 if (whole) {
391 struct task_cputime cputime;
392 struct task_struct *t = task;
393 do {
394 min_flt += t->min_flt;
395 maj_flt += t->maj_flt;
396 gtime = cputime_add(gtime, task_gtime(t));
397 t = next_thread(t);
398 } while (t != task);
399
400 min_flt += sig->min_flt;
401 maj_flt += sig->maj_flt;
402 thread_group_cputime(task, &cputime);
403 utime = cputime.utime;
404 stime = cputime.stime;
405 gtime = cputime_add(gtime, sig->gtime);
406 }
407
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);
411
412 unlock_task_sighand(task, &flags);
413 }
414
415 if (!whole || num_threads < 2)
416 wchan = get_wchan(task);
417 if (!whole) {
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);
423 }
424
425
426
427 priority = task_prio(task);
428 nice = task_nice(task);
429
430
431
432 start_time =
433 (unsigned long long)task->real_start_time.tv_sec * NSEC_PER_SEC
434 + task->real_start_time.tv_nsec;
435
436 start_time = nsec_to_clock_t(start_time);
437
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",
441 pid_nr_ns(pid, ns),
442 tcomm,
443 state,
444 ppid,
445 pgid,
446 sid,
447 tty_nr,
448 tty_pgrp,
449 task->flags,
450 min_flt,
451 cmin_flt,
452 maj_flt,
453 cmaj_flt,
454 cputime_to_clock_t(utime),
455 cputime_to_clock_t(stime),
456 cputime_to_clock_t(cutime),
457 cputime_to_clock_t(cstime),
458 priority,
459 nice,
460 num_threads,
461 start_time,
462 vsize,
463 mm ? get_mm_rss(mm) : 0,
464 rsslim,
465 mm ? mm->start_code : 0,
466 mm ? mm->end_code : 0,
467 mm ? mm->start_stack : 0,
468 esp,
469 eip,
470
471
472
473
474 task->pending.signal.sig[0] & 0x7fffffffUL,
475 task->blocked.sig[0] & 0x7fffffffUL,
476 sigign .sig[0] & 0x7fffffffUL,
477 sigcatch .sig[0] & 0x7fffffffUL,
478 wchan,
479 0UL,
480 0UL,
481 task->exit_signal,
482 task_cpu(task),
483 task->rt_priority,
484 task->policy,
485 (unsigned long long)delayacct_blkio_ticks(task),
486 cputime_to_clock_t(gtime),
487 cputime_to_clock_t(cgtime));
488 if (mm)
489 mmput(mm);
490 return 0;
491}
492
493int proc_tid_stat(struct seq_file *m, struct pid_namespace *ns,
494 struct pid *pid, struct task_struct *task)
495{
496 return do_task_stat(m, ns, pid, task, 0);
497}
498
499int proc_tgid_stat(struct seq_file *m, struct pid_namespace *ns,
500 struct pid *pid, struct task_struct *task)
501{
502 return do_task_stat(m, ns, pid, task, 1);
503}
504
505int proc_pid_statm(struct seq_file *m, struct pid_namespace *ns,
506 struct pid *pid, struct task_struct *task)
507{
508 int size = 0, resident = 0, shared = 0, text = 0, lib = 0, data = 0;
509 struct mm_struct *mm = get_task_mm(task);
510
511 if (mm) {
512 size = task_statm(mm, &shared, &text, &data, &resident);
513 mmput(mm);
514 }
515 seq_printf(m, "%d %d %d %d %d %d %d\n",
516 size, resident, shared, text, lib, data, 0);
517
518 return 0;
519}
520
