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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/ptrace.h>
84#include <linux/tracehook.h>
85
86#include <asm/pgtable.h>
87#include <asm/processor.h>
88#include "internal.h"
89
90static inline void task_name(struct seq_file *m, struct task_struct *p)
91{
92 int i;
93 char *buf, *end;
94 char *name;
95 char tcomm[sizeof(p->comm)];
96
97 get_task_comm(tcomm, p);
98
99 seq_printf(m, "Name:\t");
100 end = m->buf + m->size;
101 buf = m->buf + m->count;
102 name = tcomm;
103 i = sizeof(tcomm);
104 while (i && (buf < end)) {
105 unsigned char c = *name;
106 name++;
107 i--;
108 *buf = c;
109 if (!c)
110 break;
111 if (c == '\\') {
112 buf++;
113 if (buf < end)
114 *buf++ = c;
115 continue;
116 }
117 if (c == '\n') {
118 *buf++ = '\\';
119 if (buf < end)
120 *buf++ = 'n';
121 continue;
122 }
123 buf++;
124 }
125 m->count = buf - m->buf;
126 seq_printf(m, "\n");
127}
128
129
130
131
132
133
134
135static const char *task_state_array[] = {
136 "R (running)",
137 "S (sleeping)",
138 "D (disk sleep)",
139 "T (stopped)",
140 "T (tracing stop)",
141 "Z (zombie)",
142 "X (dead)"
143};
144
145static inline const char *get_task_state(struct task_struct *tsk)
146{
147 unsigned int state = (tsk->state & TASK_REPORT) | tsk->exit_state;
148 const char **p = &task_state_array[0];
149
150 while (state) {
151 p++;
152 state >>= 1;
153 }
154 return *p;
155}
156
157static inline void task_state(struct seq_file *m, struct pid_namespace *ns,
158 struct pid *pid, struct task_struct *p)
159{
160 struct group_info *group_info;
161 int g;
162 struct fdtable *fdt = NULL;
163 const struct cred *cred;
164 pid_t ppid, tpid;
165
166 rcu_read_lock();
167 ppid = pid_alive(p) ?
168 task_tgid_nr_ns(rcu_dereference(p->real_parent), ns) : 0;
169 tpid = 0;
170 if (pid_alive(p)) {
171 struct task_struct *tracer = tracehook_tracer_task(p);
172 if (tracer)
173 tpid = task_pid_nr_ns(tracer, ns);
174 }
175 cred = get_cred((struct cred *) __task_cred(p));
176 seq_printf(m,
177 "State:\t%s\n"
178 "Tgid:\t%d\n"
179 "Pid:\t%d\n"
180 "PPid:\t%d\n"
181 "TracerPid:\t%d\n"
182 "Uid:\t%d\t%d\t%d\t%d\n"
183 "Gid:\t%d\t%d\t%d\t%d\n",
184 get_task_state(p),
185 task_tgid_nr_ns(p, ns),
186 pid_nr_ns(pid, ns),
187 ppid, tpid,
188 cred->uid, cred->euid, cred->suid, cred->fsuid,
189 cred->gid, cred->egid, cred->sgid, cred->fsgid);
190
191 task_lock(p);
192 if (p->files)
193 fdt = files_fdtable(p->files);
194 seq_printf(m,
195 "FDSize:\t%d\n"
196 "Groups:\t",
197 fdt ? fdt->max_fds : 0);
198 rcu_read_unlock();
199
200 group_info = cred->group_info;
201 task_unlock(p);
202
203 for (g = 0; g < min(group_info->ngroups, NGROUPS_SMALL); g++)
204 seq_printf(m, "%d ", GROUP_AT(group_info, g));
205 put_cred(cred);
206
207 seq_printf(m, "\n");
208}
209
210static void render_sigset_t(struct seq_file *m, const char *header,
211 sigset_t *set)
212{
213 int i;
214
215 seq_printf(m, "%s", header);
216
217 i = _NSIG;
218 do {
219 int x = 0;
220
221 i -= 4;
222 if (sigismember(set, i+1)) x |= 1;
223 if (sigismember(set, i+2)) x |= 2;
224 if (sigismember(set, i+3)) x |= 4;
225 if (sigismember(set, i+4)) x |= 8;
226 seq_printf(m, "%x", x);
227 } while (i >= 4);
228
229 seq_printf(m, "\n");
230}
231
232static void collect_sigign_sigcatch(struct task_struct *p, sigset_t *ign,
233 sigset_t *catch)
234{
235 struct k_sigaction *k;
236 int i;
237
238 k = p->sighand->action;
239 for (i = 1; i <= _NSIG; ++i, ++k) {
240 if (k->sa.sa_handler == SIG_IGN)
241 sigaddset(ign, i);
242 else if (k->sa.sa_handler != SIG_DFL)
243 sigaddset(catch, i);
244 }
245}
246
247static inline void task_sig(struct seq_file *m, struct task_struct *p)
248{
249 unsigned long flags;
250 sigset_t pending, shpending, blocked, ignored, caught;
251 int num_threads = 0;
252 unsigned long qsize = 0;
253 unsigned long qlim = 0;
254
255 sigemptyset(&pending);
256 sigemptyset(&shpending);
257 sigemptyset(&blocked);
258 sigemptyset(&ignored);
259 sigemptyset(&caught);
260
261 if (lock_task_sighand(p, &flags)) {
262 pending = p->pending.signal;
263 shpending = p->signal->shared_pending.signal;
264 blocked = p->blocked;
265 collect_sigign_sigcatch(p, &ignored, &caught);
266 num_threads = atomic_read(&p->signal->count);
267 qsize = atomic_read(&__task_cred(p)->user->sigpending);
268 qlim = p->signal->rlim[RLIMIT_SIGPENDING].rlim_cur;
269 unlock_task_sighand(p, &flags);
270 }
271
272 seq_printf(m, "Threads:\t%d\n", num_threads);
273 seq_printf(m, "SigQ:\t%lu/%lu\n", qsize, qlim);
274
275
276 render_sigset_t(m, "SigPnd:\t", &pending);
277 render_sigset_t(m, "ShdPnd:\t", &shpending);
278 render_sigset_t(m, "SigBlk:\t", &blocked);
279 render_sigset_t(m, "SigIgn:\t", &ignored);
280 render_sigset_t(m, "SigCgt:\t", &caught);
281}
282
283static void render_cap_t(struct seq_file *m, const char *header,
284 kernel_cap_t *a)
285{
286 unsigned __capi;
287
288 seq_printf(m, "%s", header);
289 CAP_FOR_EACH_U32(__capi) {
290 seq_printf(m, "%08x",
291 a->cap[(_KERNEL_CAPABILITY_U32S-1) - __capi]);
292 }
293 seq_printf(m, "\n");
294}
295
296static inline void task_cap(struct seq_file *m, struct task_struct *p)
297{
298 const struct cred *cred;
299 kernel_cap_t cap_inheritable, cap_permitted, cap_effective, cap_bset;
300
301 rcu_read_lock();
302 cred = __task_cred(p);
303 cap_inheritable = cred->cap_inheritable;
304 cap_permitted = cred->cap_permitted;
305 cap_effective = cred->cap_effective;
306 cap_bset = cred->cap_bset;
307 rcu_read_unlock();
308
309 render_cap_t(m, "CapInh:\t", &cap_inheritable);
310 render_cap_t(m, "CapPrm:\t", &cap_permitted);
311 render_cap_t(m, "CapEff:\t", &cap_effective);
312 render_cap_t(m, "CapBnd:\t", &cap_bset);
313}
314
315static inline void task_context_switch_counts(struct seq_file *m,
316 struct task_struct *p)
317{
318 seq_printf(m, "voluntary_ctxt_switches:\t%lu\n"
319 "nonvoluntary_ctxt_switches:\t%lu\n",
320 p->nvcsw,
321 p->nivcsw);
322}
323
324int proc_pid_status(struct seq_file *m, struct pid_namespace *ns,
325 struct pid *pid, struct task_struct *task)
326{
327 struct mm_struct *mm = get_task_mm(task);
328
329 task_name(m, task);
330 task_state(m, ns, pid, task);
331
332 if (mm) {
333 task_mem(m, mm);
334 mmput(mm);
335 }
336 task_sig(m, task);
337 task_cap(m, task);
338 cpuset_task_status_allowed(m, task);
339#if defined(CONFIG_S390)
340 task_show_regs(m, task);
341#endif
342 task_context_switch_counts(m, task);
343 return 0;
344}
345
346static int do_task_stat(struct seq_file *m, struct pid_namespace *ns,
347 struct pid *pid, struct task_struct *task, int whole)
348{
349 unsigned long vsize, eip, esp, wchan = ~0UL;
350 long priority, nice;
351 int tty_pgrp = -1, tty_nr = 0;
352 sigset_t sigign, sigcatch;
353 char state;
354 pid_t ppid = 0, pgid = -1, sid = -1;
355 int num_threads = 0;
356 int permitted;
357 struct mm_struct *mm;
358 unsigned long long start_time;
359 unsigned long cmin_flt = 0, cmaj_flt = 0;
360 unsigned long min_flt = 0, maj_flt = 0;
361 cputime_t cutime, cstime, utime, stime;
362 cputime_t cgtime, gtime;
363 unsigned long rsslim = 0;
364 char tcomm[sizeof(task->comm)];
365 unsigned long flags;
366
367 state = *get_task_state(task);
368 vsize = eip = esp = 0;
369 permitted = ptrace_may_access(task, PTRACE_MODE_READ);
370 mm = get_task_mm(task);
371 if (mm) {
372 vsize = task_vsize(mm);
373 if (permitted) {
374 eip = KSTK_EIP(task);
375 esp = KSTK_ESP(task);
376 }
377 }
378
379 get_task_comm(tcomm, task);
380
381 sigemptyset(&sigign);
382 sigemptyset(&sigcatch);
383 cutime = cstime = utime = stime = cputime_zero;
384 cgtime = gtime = cputime_zero;
385
386 if (lock_task_sighand(task, &flags)) {
387 struct signal_struct *sig = task->signal;
388
389 if (sig->tty) {
390 struct pid *pgrp = tty_get_pgrp(sig->tty);
391 tty_pgrp = pid_nr_ns(pgrp, ns);
392 put_pid(pgrp);
393 tty_nr = new_encode_dev(tty_devnum(sig->tty));
394 }
395
396 num_threads = atomic_read(&sig->count);
397 collect_sigign_sigcatch(task, &sigign, &sigcatch);
398
399 cmin_flt = sig->cmin_flt;
400 cmaj_flt = sig->cmaj_flt;
401 cutime = sig->cutime;
402 cstime = sig->cstime;
403 cgtime = sig->cgtime;
404 rsslim = sig->rlim[RLIMIT_RSS].rlim_cur;
405
406
407 if (whole) {
408 struct task_cputime cputime;
409 struct task_struct *t = task;
410 do {
411 min_flt += t->min_flt;
412 maj_flt += t->maj_flt;
413 gtime = cputime_add(gtime, task_gtime(t));
414 t = next_thread(t);
415 } while (t != task);
416
417 min_flt += sig->min_flt;
418 maj_flt += sig->maj_flt;
419 thread_group_cputime(task, &cputime);
420 utime = cputime.utime;
421 stime = cputime.stime;
422 gtime = cputime_add(gtime, sig->gtime);
423 }
424
425 sid = task_session_nr_ns(task, ns);
426 ppid = task_tgid_nr_ns(task->real_parent, ns);
427 pgid = task_pgrp_nr_ns(task, ns);
428
429 unlock_task_sighand(task, &flags);
430 }
431
432 if (permitted && (!whole || num_threads < 2))
433 wchan = get_wchan(task);
434 if (!whole) {
435 min_flt = task->min_flt;
436 maj_flt = task->maj_flt;
437 utime = task_utime(task);
438 stime = task_stime(task);
439 gtime = task_gtime(task);
440 }
441
442
443
444 priority = task_prio(task);
445 nice = task_nice(task);
446
447
448
449 start_time =
450 (unsigned long long)task->real_start_time.tv_sec * NSEC_PER_SEC
451 + task->real_start_time.tv_nsec;
452
453 start_time = nsec_to_clock_t(start_time);
454
455 seq_printf(m, "%d (%s) %c %d %d %d %d %d %u %lu \
456%lu %lu %lu %lu %lu %ld %ld %ld %ld %d 0 %llu %lu %ld %lu %lu %lu %lu %lu \
457%lu %lu %lu %lu %lu %lu %lu %lu %d %d %u %u %llu %lu %ld\n",
458 pid_nr_ns(pid, ns),
459 tcomm,
460 state,
461 ppid,
462 pgid,
463 sid,
464 tty_nr,
465 tty_pgrp,
466 task->flags,
467 min_flt,
468 cmin_flt,
469 maj_flt,
470 cmaj_flt,
471 cputime_to_clock_t(utime),
472 cputime_to_clock_t(stime),
473 cputime_to_clock_t(cutime),
474 cputime_to_clock_t(cstime),
475 priority,
476 nice,
477 num_threads,
478 start_time,
479 vsize,
480 mm ? get_mm_rss(mm) : 0,
481 rsslim,
482 mm ? mm->start_code : 0,
483 mm ? mm->end_code : 0,
484 (permitted && mm) ? mm->start_stack : 0,
485 esp,
486 eip,
487
488
489
490
491 task->pending.signal.sig[0] & 0x7fffffffUL,
492 task->blocked.sig[0] & 0x7fffffffUL,
493 sigign .sig[0] & 0x7fffffffUL,
494 sigcatch .sig[0] & 0x7fffffffUL,
495 wchan,
496 0UL,
497 0UL,
498 task->exit_signal,
499 task_cpu(task),
500 task->rt_priority,
501 task->policy,
502 (unsigned long long)delayacct_blkio_ticks(task),
503 cputime_to_clock_t(gtime),
504 cputime_to_clock_t(cgtime));
505 if (mm)
506 mmput(mm);
507 return 0;
508}
509
510int proc_tid_stat(struct seq_file *m, struct pid_namespace *ns,
511 struct pid *pid, struct task_struct *task)
512{
513 return do_task_stat(m, ns, pid, task, 0);
514}
515
516int proc_tgid_stat(struct seq_file *m, struct pid_namespace *ns,
517 struct pid *pid, struct task_struct *task)
518{
519 return do_task_stat(m, ns, pid, task, 1);
520}
521
522int proc_pid_statm(struct seq_file *m, struct pid_namespace *ns,
523 struct pid *pid, struct task_struct *task)
524{
525 int size = 0, resident = 0, shared = 0, text = 0, lib = 0, data = 0;
526 struct mm_struct *mm = get_task_mm(task);
527
528 if (mm) {
529 size = task_statm(mm, &shared, &text, &data, &resident);
530 mmput(mm);
531 }
532 seq_printf(m, "%d %d %d %d %d %d %d\n",
533 size, resident, shared, text, lib, data, 0);
534
535 return 0;
536}
537
