blob: 07f77a7945c320e7b9ac133e523f83b9824691e2 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * linux/fs/proc/array.c
3 *
4 * Copyright (C) 1992 by Linus Torvalds
5 * based on ideas by Darren Senn
6 *
7 * Fixes:
8 * Michael. K. Johnson: stat,statm extensions.
9 * <johnsonm@stolaf.edu>
10 *
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>
16 *
17 * Danny ter Haar : added cpuinfo
18 * <dth@cistron.nl>
19 *
20 * Alessandro Rubini : profile extension.
21 * <rubini@ipvvis.unipv.it>
22 *
23 * Jeff Tranter : added BogoMips field to cpuinfo
24 * <Jeff_Tranter@Mitel.COM>
25 *
26 * Bruno Haible : remove 4K limit for the maps file
27 * <haible@ma2s2.mathematik.uni-karlsruhe.de>
28 *
29 * Yves Arrouye : remove removal of trailing spaces in get_array.
30 * <Yves.Arrouye@marin.fdn.fr>
31 *
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>
38 *
39 * aeb@cwi.nl : /proc/partitions
40 *
41 *
42 * Alan Cox : security fixes.
Alan Cox526719b2008-10-27 15:19:48 +000043 * <alan@lxorguk.ukuu.org.uk>
Linus Torvalds1da177e2005-04-16 15:20:36 -070044 *
45 * Al Viro : safe handling of mm_struct
46 *
47 * Gerhard Wichert : added BIGMEM support
48 * Siemens AG <Gerhard.Wichert@pdb.siemens.de>
49 *
50 * Al Viro & Jeff Garzik : moved most of the thing into base.c and
51 * : proc_misc.c. The rest may eventually go into
52 * : base.c too.
53 */
54
Linus Torvalds1da177e2005-04-16 15:20:36 -070055#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>
Ingo Molnar8ea02602007-07-16 09:46:31 +020065#include <linux/uaccess.h>
66#include <linux/io.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070067#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>
Al Viro9f3acc32008-04-24 07:44:08 -040076#include <linux/fdtable.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070077#include <linux/times.h>
78#include <linux/cpuset.h>
Dipankar Sarma4fb3a532005-09-16 19:28:13 -070079#include <linux/rcupdate.h>
Shailabh Nagar25890452006-07-14 00:24:43 -070080#include <linux/delayacct.h>
Eric W. Biedermanee992742008-02-08 04:18:31 -080081#include <linux/seq_file.h>
Pavel Emelyanovb4888932007-10-18 23:40:14 -070082#include <linux/pid_namespace.h>
Jake Edgef83ce3e2009-05-04 12:51:14 -060083#include <linux/ptrace.h>
Roland McGrath0d094ef2008-07-25 19:45:49 -070084#include <linux/tracehook.h>
Stefani Seiboldd899bf72009-09-22 16:45:40 -070085#include <linux/swapops.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070086
Linus Torvalds1da177e2005-04-16 15:20:36 -070087#include <asm/pgtable.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070088#include <asm/processor.h>
89#include "internal.h"
90
Eric W. Biedermandf5f8312008-02-08 04:18:33 -080091static inline void task_name(struct seq_file *m, struct task_struct *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -070092{
93 int i;
Eric W. Biedermandf5f8312008-02-08 04:18:33 -080094 char *buf, *end;
Ingo Molnar8ea02602007-07-16 09:46:31 +020095 char *name;
Linus Torvalds1da177e2005-04-16 15:20:36 -070096 char tcomm[sizeof(p->comm)];
97
98 get_task_comm(tcomm, p);
99
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800100 seq_printf(m, "Name:\t");
101 end = m->buf + m->size;
102 buf = m->buf + m->count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 name = tcomm;
104 i = sizeof(tcomm);
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800105 while (i && (buf < end)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106 unsigned char c = *name;
107 name++;
108 i--;
109 *buf = c;
110 if (!c)
111 break;
112 if (c == '\\') {
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800113 buf++;
114 if (buf < end)
115 *buf++ = c;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 continue;
117 }
118 if (c == '\n') {
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800119 *buf++ = '\\';
120 if (buf < end)
121 *buf++ = 'n';
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 continue;
123 }
124 buf++;
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800125 }
126 m->count = buf - m->buf;
127 seq_printf(m, "\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128}
129
130/*
131 * The task state array is a strange "bitmap" of
132 * reasons to sleep. Thus "running" is zero, and
133 * you can test for combinations of others with
134 * simple bit tests.
135 */
136static const char *task_state_array[] = {
137 "R (running)", /* 0 */
138 "S (sleeping)", /* 1 */
139 "D (disk sleep)", /* 2 */
140 "T (stopped)", /* 4 */
141 "T (tracing stop)", /* 8 */
142 "Z (zombie)", /* 16 */
143 "X (dead)" /* 32 */
144};
145
Ingo Molnar8ea02602007-07-16 09:46:31 +0200146static inline const char *get_task_state(struct task_struct *tsk)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147{
Matthew Wilcox1587e2b2007-12-06 11:03:36 -0500148 unsigned int state = (tsk->state & TASK_REPORT) | tsk->exit_state;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149 const char **p = &task_state_array[0];
150
151 while (state) {
152 p++;
153 state >>= 1;
154 }
155 return *p;
156}
157
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800158static inline void task_state(struct seq_file *m, struct pid_namespace *ns,
159 struct pid *pid, struct task_struct *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160{
161 struct group_info *group_info;
162 int g;
Dipankar Sarmabadf1662005-09-09 13:04:10 -0700163 struct fdtable *fdt = NULL;
David Howellsc69e8d92008-11-14 10:39:19 +1100164 const struct cred *cred;
Pavel Emelyanovb4888932007-10-18 23:40:14 -0700165 pid_t ppid, tpid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166
Oleg Nesterovb0fa9db2006-10-02 02:18:54 -0700167 rcu_read_lock();
Pavel Emelyanovb4888932007-10-18 23:40:14 -0700168 ppid = pid_alive(p) ?
169 task_tgid_nr_ns(rcu_dereference(p->real_parent), ns) : 0;
Roland McGrath0d094ef2008-07-25 19:45:49 -0700170 tpid = 0;
171 if (pid_alive(p)) {
172 struct task_struct *tracer = tracehook_tracer_task(p);
173 if (tracer)
174 tpid = task_pid_nr_ns(tracer, ns);
175 }
David Howellsc69e8d92008-11-14 10:39:19 +1100176 cred = get_cred((struct cred *) __task_cred(p));
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800177 seq_printf(m,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 "State:\t%s\n"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179 "Tgid:\t%d\n"
180 "Pid:\t%d\n"
181 "PPid:\t%d\n"
182 "TracerPid:\t%d\n"
183 "Uid:\t%d\t%d\t%d\t%d\n"
184 "Gid:\t%d\t%d\t%d\t%d\n",
185 get_task_state(p),
Pavel Emelyanovb4888932007-10-18 23:40:14 -0700186 task_tgid_nr_ns(p, ns),
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800187 pid_nr_ns(pid, ns),
Pavel Emelyanovb4888932007-10-18 23:40:14 -0700188 ppid, tpid,
David Howellsc69e8d92008-11-14 10:39:19 +1100189 cred->uid, cred->euid, cred->suid, cred->fsuid,
190 cred->gid, cred->egid, cred->sgid, cred->fsgid);
Oleg Nesterovb0fa9db2006-10-02 02:18:54 -0700191
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 task_lock(p);
Dipankar Sarmabadf1662005-09-09 13:04:10 -0700193 if (p->files)
194 fdt = files_fdtable(p->files);
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800195 seq_printf(m,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196 "FDSize:\t%d\n"
197 "Groups:\t",
Dipankar Sarmabadf1662005-09-09 13:04:10 -0700198 fdt ? fdt->max_fds : 0);
Dipankar Sarma4fb3a532005-09-16 19:28:13 -0700199 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200
David Howellsc69e8d92008-11-14 10:39:19 +1100201 group_info = cred->group_info;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202 task_unlock(p);
203
Ingo Molnar8ea02602007-07-16 09:46:31 +0200204 for (g = 0; g < min(group_info->ngroups, NGROUPS_SMALL); g++)
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800205 seq_printf(m, "%d ", GROUP_AT(group_info, g));
David Howellsc69e8d92008-11-14 10:39:19 +1100206 put_cred(cred);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800208 seq_printf(m, "\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209}
210
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800211static void render_sigset_t(struct seq_file *m, const char *header,
212 sigset_t *set)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213{
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800214 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800216 seq_printf(m, "%s", header);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217
218 i = _NSIG;
219 do {
220 int x = 0;
221
222 i -= 4;
223 if (sigismember(set, i+1)) x |= 1;
224 if (sigismember(set, i+2)) x |= 2;
225 if (sigismember(set, i+3)) x |= 4;
226 if (sigismember(set, i+4)) x |= 8;
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800227 seq_printf(m, "%x", x);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228 } while (i >= 4);
229
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800230 seq_printf(m, "\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231}
232
233static void collect_sigign_sigcatch(struct task_struct *p, sigset_t *ign,
234 sigset_t *catch)
235{
236 struct k_sigaction *k;
237 int i;
238
239 k = p->sighand->action;
240 for (i = 1; i <= _NSIG; ++i, ++k) {
241 if (k->sa.sa_handler == SIG_IGN)
242 sigaddset(ign, i);
243 else if (k->sa.sa_handler != SIG_DFL)
244 sigaddset(catch, i);
245 }
246}
247
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800248static inline void task_sig(struct seq_file *m, struct task_struct *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249{
Oleg Nesterov5e6b3f42006-10-02 02:18:52 -0700250 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251 sigset_t pending, shpending, blocked, ignored, caught;
252 int num_threads = 0;
253 unsigned long qsize = 0;
254 unsigned long qlim = 0;
255
256 sigemptyset(&pending);
257 sigemptyset(&shpending);
258 sigemptyset(&blocked);
259 sigemptyset(&ignored);
260 sigemptyset(&caught);
261
Oleg Nesterov5e6b3f42006-10-02 02:18:52 -0700262 if (lock_task_sighand(p, &flags)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 pending = p->pending.signal;
264 shpending = p->signal->shared_pending.signal;
265 blocked = p->blocked;
266 collect_sigign_sigcatch(p, &ignored, &caught);
267 num_threads = atomic_read(&p->signal->count);
David Howellsc69e8d92008-11-14 10:39:19 +1100268 qsize = atomic_read(&__task_cred(p)->user->sigpending);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269 qlim = p->signal->rlim[RLIMIT_SIGPENDING].rlim_cur;
Oleg Nesterov5e6b3f42006-10-02 02:18:52 -0700270 unlock_task_sighand(p, &flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800273 seq_printf(m, "Threads:\t%d\n", num_threads);
274 seq_printf(m, "SigQ:\t%lu/%lu\n", qsize, qlim);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275
276 /* render them all */
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800277 render_sigset_t(m, "SigPnd:\t", &pending);
278 render_sigset_t(m, "ShdPnd:\t", &shpending);
279 render_sigset_t(m, "SigBlk:\t", &blocked);
280 render_sigset_t(m, "SigIgn:\t", &ignored);
281 render_sigset_t(m, "SigCgt:\t", &caught);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282}
283
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800284static void render_cap_t(struct seq_file *m, const char *header,
285 kernel_cap_t *a)
Andrew Morgane338d262008-02-04 22:29:42 -0800286{
287 unsigned __capi;
288
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800289 seq_printf(m, "%s", header);
Andrew Morgane338d262008-02-04 22:29:42 -0800290 CAP_FOR_EACH_U32(__capi) {
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800291 seq_printf(m, "%08x",
Andrew G. Morganca05a992008-05-27 22:05:17 -0700292 a->cap[(_KERNEL_CAPABILITY_U32S-1) - __capi]);
Andrew Morgane338d262008-02-04 22:29:42 -0800293 }
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800294 seq_printf(m, "\n");
Andrew Morgane338d262008-02-04 22:29:42 -0800295}
296
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800297static inline void task_cap(struct seq_file *m, struct task_struct *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298{
David Howellsc69e8d92008-11-14 10:39:19 +1100299 const struct cred *cred;
300 kernel_cap_t cap_inheritable, cap_permitted, cap_effective, cap_bset;
David Howellsb6dff3e2008-11-14 10:39:16 +1100301
David Howellsc69e8d92008-11-14 10:39:19 +1100302 rcu_read_lock();
303 cred = __task_cred(p);
304 cap_inheritable = cred->cap_inheritable;
305 cap_permitted = cred->cap_permitted;
306 cap_effective = cred->cap_effective;
307 cap_bset = cred->cap_bset;
308 rcu_read_unlock();
309
310 render_cap_t(m, "CapInh:\t", &cap_inheritable);
311 render_cap_t(m, "CapPrm:\t", &cap_permitted);
312 render_cap_t(m, "CapEff:\t", &cap_effective);
313 render_cap_t(m, "CapBnd:\t", &cap_bset);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314}
315
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800316static inline void task_context_switch_counts(struct seq_file *m,
317 struct task_struct *p)
Maxim Uvarovb663a792007-07-15 23:40:48 -0700318{
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800319 seq_printf(m, "voluntary_ctxt_switches:\t%lu\n"
320 "nonvoluntary_ctxt_switches:\t%lu\n",
321 p->nvcsw,
322 p->nivcsw);
Maxim Uvarovb663a792007-07-15 23:40:48 -0700323}
324
Andrew Mortonc44972f2009-09-24 14:47:43 -0700325#ifdef CONFIG_MMU
326
Stefani Seiboldd899bf72009-09-22 16:45:40 -0700327struct stack_stats {
328 struct vm_area_struct *vma;
329 unsigned long startpage;
330 unsigned long usage;
331};
332
333static int stack_usage_pte_range(pmd_t *pmd, unsigned long addr,
334 unsigned long end, struct mm_walk *walk)
335{
336 struct stack_stats *ss = walk->private;
337 struct vm_area_struct *vma = ss->vma;
338 pte_t *pte, ptent;
339 spinlock_t *ptl;
340 int ret = 0;
341
342 pte = pte_offset_map_lock(vma->vm_mm, pmd, addr, &ptl);
343 for (; addr != end; pte++, addr += PAGE_SIZE) {
344 ptent = *pte;
345
346#ifdef CONFIG_STACK_GROWSUP
347 if (pte_present(ptent) || is_swap_pte(ptent))
348 ss->usage = addr - ss->startpage + PAGE_SIZE;
349#else
350 if (pte_present(ptent) || is_swap_pte(ptent)) {
351 ss->usage = ss->startpage - addr + PAGE_SIZE;
352 pte++;
353 ret = 1;
354 break;
355 }
356#endif
357 }
358 pte_unmap_unlock(pte - 1, ptl);
359 cond_resched();
360 return ret;
361}
362
363static inline unsigned long get_stack_usage_in_bytes(struct vm_area_struct *vma,
364 struct task_struct *task)
365{
366 struct stack_stats ss;
367 struct mm_walk stack_walk = {
368 .pmd_entry = stack_usage_pte_range,
369 .mm = vma->vm_mm,
370 .private = &ss,
371 };
372
373 if (!vma->vm_mm || is_vm_hugetlb_page(vma))
374 return 0;
375
376 ss.vma = vma;
377 ss.startpage = task->stack_start & PAGE_MASK;
378 ss.usage = 0;
379
380#ifdef CONFIG_STACK_GROWSUP
381 walk_page_range(KSTK_ESP(task) & PAGE_MASK, vma->vm_end,
382 &stack_walk);
383#else
384 walk_page_range(vma->vm_start, (KSTK_ESP(task) & PAGE_MASK) + PAGE_SIZE,
385 &stack_walk);
386#endif
387 return ss.usage;
388}
389
390static inline void task_show_stack_usage(struct seq_file *m,
391 struct task_struct *task)
392{
393 struct vm_area_struct *vma;
394 struct mm_struct *mm = get_task_mm(task);
395
396 if (mm) {
397 down_read(&mm->mmap_sem);
398 vma = find_vma(mm, task->stack_start);
399 if (vma)
400 seq_printf(m, "Stack usage:\t%lu kB\n",
401 get_stack_usage_in_bytes(vma, task) >> 10);
402
403 up_read(&mm->mmap_sem);
404 mmput(mm);
405 }
406}
Andrew Mortonc44972f2009-09-24 14:47:43 -0700407#else
408static void task_show_stack_usage(struct seq_file *m, struct task_struct *task)
409{
410}
411#endif /* CONFIG_MMU */
Stefani Seiboldd899bf72009-09-22 16:45:40 -0700412
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800413int proc_pid_status(struct seq_file *m, struct pid_namespace *ns,
414 struct pid *pid, struct task_struct *task)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416 struct mm_struct *mm = get_task_mm(task);
417
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800418 task_name(m, task);
419 task_state(m, ns, pid, task);
Ingo Molnar8ea02602007-07-16 09:46:31 +0200420
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421 if (mm) {
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800422 task_mem(m, mm);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423 mmput(mm);
424 }
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800425 task_sig(m, task);
426 task_cap(m, task);
427 cpuset_task_status_allowed(m, task);
Martin Schwidefsky347a8dc2006-01-06 00:19:28 -0800428#if defined(CONFIG_S390)
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800429 task_show_regs(m, task);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430#endif
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800431 task_context_switch_counts(m, task);
Stefani Seiboldd899bf72009-09-22 16:45:40 -0700432 task_show_stack_usage(m, task);
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800433 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434}
435
Eric W. Biedermanee992742008-02-08 04:18:31 -0800436static int do_task_stat(struct seq_file *m, struct pid_namespace *ns,
437 struct pid *pid, struct task_struct *task, int whole)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438{
439 unsigned long vsize, eip, esp, wchan = ~0UL;
440 long priority, nice;
441 int tty_pgrp = -1, tty_nr = 0;
442 sigset_t sigign, sigcatch;
443 char state;
Ingo Molnar8ea02602007-07-16 09:46:31 +0200444 pid_t ppid = 0, pgid = -1, sid = -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445 int num_threads = 0;
Jake Edgef83ce3e2009-05-04 12:51:14 -0600446 int permitted;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447 struct mm_struct *mm;
448 unsigned long long start_time;
449 unsigned long cmin_flt = 0, cmaj_flt = 0;
450 unsigned long min_flt = 0, maj_flt = 0;
Christian Borntraegerefe567f2007-08-23 15:18:02 +0200451 cputime_t cutime, cstime, utime, stime;
Laurent Vivier9ac52312007-10-15 17:00:19 +0200452 cputime_t cgtime, gtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453 unsigned long rsslim = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 char tcomm[sizeof(task->comm)];
Oleg Nesterova593d6e2006-10-02 02:18:53 -0700455 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456
457 state = *get_task_state(task);
458 vsize = eip = esp = 0;
Jake Edgef83ce3e2009-05-04 12:51:14 -0600459 permitted = ptrace_may_access(task, PTRACE_MODE_READ);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460 mm = get_task_mm(task);
461 if (mm) {
462 vsize = task_vsize(mm);
Jake Edgef83ce3e2009-05-04 12:51:14 -0600463 if (permitted) {
464 eip = KSTK_EIP(task);
465 esp = KSTK_ESP(task);
466 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467 }
468
469 get_task_comm(tcomm, task);
470
471 sigemptyset(&sigign);
472 sigemptyset(&sigcatch);
Christian Borntraegerefe567f2007-08-23 15:18:02 +0200473 cutime = cstime = utime = stime = cputime_zero;
Laurent Vivier9ac52312007-10-15 17:00:19 +0200474 cgtime = gtime = cputime_zero;
Alan Cox3cfd0882006-09-29 02:00:41 -0700475
Oleg Nesterova593d6e2006-10-02 02:18:53 -0700476 if (lock_task_sighand(task, &flags)) {
477 struct signal_struct *sig = task->signal;
Oleg Nesterova593d6e2006-10-02 02:18:53 -0700478
Oleg Nesterov91593502006-12-08 02:36:07 -0800479 if (sig->tty) {
Alan Cox5d0fdf12008-04-30 00:53:31 -0700480 struct pid *pgrp = tty_get_pgrp(sig->tty);
481 tty_pgrp = pid_nr_ns(pgrp, ns);
482 put_pid(pgrp);
Oleg Nesterov91593502006-12-08 02:36:07 -0800483 tty_nr = new_encode_dev(tty_devnum(sig->tty));
Oleg Nesterova593d6e2006-10-02 02:18:53 -0700484 }
485
486 num_threads = atomic_read(&sig->count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487 collect_sigign_sigcatch(task, &sigign, &sigcatch);
488
Oleg Nesterova593d6e2006-10-02 02:18:53 -0700489 cmin_flt = sig->cmin_flt;
490 cmaj_flt = sig->cmaj_flt;
491 cutime = sig->cutime;
492 cstime = sig->cstime;
Laurent Vivier9ac52312007-10-15 17:00:19 +0200493 cgtime = sig->cgtime;
Oleg Nesterova593d6e2006-10-02 02:18:53 -0700494 rsslim = sig->rlim[RLIMIT_RSS].rlim_cur;
495
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496 /* add up live thread stats at the group level */
497 if (whole) {
Frank Mayharf06febc2008-09-12 09:54:39 -0700498 struct task_cputime cputime;
Oleg Nesterova593d6e2006-10-02 02:18:53 -0700499 struct task_struct *t = task;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500 do {
501 min_flt += t->min_flt;
502 maj_flt += t->maj_flt;
Laurent Vivier9ac52312007-10-15 17:00:19 +0200503 gtime = cputime_add(gtime, task_gtime(t));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504 t = next_thread(t);
505 } while (t != task);
Oleg Nesterova593d6e2006-10-02 02:18:53 -0700506
507 min_flt += sig->min_flt;
508 maj_flt += sig->maj_flt;
Frank Mayharf06febc2008-09-12 09:54:39 -0700509 thread_group_cputime(task, &cputime);
510 utime = cputime.utime;
511 stime = cputime.stime;
Christian Borntraegerf9e26292007-10-19 20:52:40 +0200512 gtime = cputime_add(gtime, sig->gtime);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513 }
514
Pavel Emelyanovb4888932007-10-18 23:40:14 -0700515 sid = task_session_nr_ns(task, ns);
Oleg Nesterova98fdce2008-01-15 00:02:37 +0300516 ppid = task_tgid_nr_ns(task->real_parent, ns);
Pavel Emelyanovb4888932007-10-18 23:40:14 -0700517 pgid = task_pgrp_nr_ns(task, ns);
Oleg Nesterova593d6e2006-10-02 02:18:53 -0700518
519 unlock_task_sighand(task, &flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521
Jake Edgef83ce3e2009-05-04 12:51:14 -0600522 if (permitted && (!whole || num_threads < 2))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523 wchan = get_wchan(task);
524 if (!whole) {
525 min_flt = task->min_flt;
526 maj_flt = task->maj_flt;
Ingo Molnarb27f03d2007-07-09 18:51:59 +0200527 utime = task_utime(task);
528 stime = task_stime(task);
Laurent Vivier9ac52312007-10-15 17:00:19 +0200529 gtime = task_gtime(task);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530 }
531
532 /* scale priority and nice values from timeslices to -20..20 */
533 /* to make it look like a "normal" Unix priority/nice value */
534 priority = task_prio(task);
535 nice = task_nice(task);
536
537 /* Temporary variable needed for gcc-2.96 */
538 /* convert timespec -> nsec*/
Tomas Janousek924b42d2007-07-15 23:39:42 -0700539 start_time =
540 (unsigned long long)task->real_start_time.tv_sec * NSEC_PER_SEC
541 + task->real_start_time.tv_nsec;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542 /* convert nsec -> ticks */
543 start_time = nsec_to_clock_t(start_time);
544
Eric W. Biedermanee992742008-02-08 04:18:31 -0800545 seq_printf(m, "%d (%s) %c %d %d %d %d %d %u %lu \
Roman Zippel4dee26b2006-03-26 01:38:10 -0800546%lu %lu %lu %lu %lu %ld %ld %ld %ld %d 0 %llu %lu %ld %lu %lu %lu %lu %lu \
Laurent Vivier9ac52312007-10-15 17:00:19 +0200547%lu %lu %lu %lu %lu %lu %lu %lu %d %d %u %u %llu %lu %ld\n",
Eric W. Biedermanee992742008-02-08 04:18:31 -0800548 pid_nr_ns(pid, ns),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549 tcomm,
550 state,
551 ppid,
552 pgid,
553 sid,
554 tty_nr,
555 tty_pgrp,
556 task->flags,
557 min_flt,
558 cmin_flt,
559 maj_flt,
560 cmaj_flt,
Christian Borntraegerefe567f2007-08-23 15:18:02 +0200561 cputime_to_clock_t(utime),
562 cputime_to_clock_t(stime),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563 cputime_to_clock_t(cutime),
564 cputime_to_clock_t(cstime),
565 priority,
566 nice,
567 num_threads,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568 start_time,
569 vsize,
Hugh Dickins42946212005-10-29 18:16:05 -0700570 mm ? get_mm_rss(mm) : 0,
Ingo Molnar8ea02602007-07-16 09:46:31 +0200571 rsslim,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572 mm ? mm->start_code : 0,
573 mm ? mm->end_code : 0,
Stefani Seiboldd899bf72009-09-22 16:45:40 -0700574 (permitted) ? task->stack_start : 0,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575 esp,
576 eip,
577 /* The signal information here is obsolete.
578 * It must be decimal for Linux 2.0 compatibility.
579 * Use /proc/#/status for real-time signals.
580 */
581 task->pending.signal.sig[0] & 0x7fffffffUL,
582 task->blocked.sig[0] & 0x7fffffffUL,
583 sigign .sig[0] & 0x7fffffffUL,
584 sigcatch .sig[0] & 0x7fffffffUL,
585 wchan,
586 0UL,
587 0UL,
588 task->exit_signal,
589 task_cpu(task),
590 task->rt_priority,
Shailabh Nagar25890452006-07-14 00:24:43 -0700591 task->policy,
Laurent Vivier9ac52312007-10-15 17:00:19 +0200592 (unsigned long long)delayacct_blkio_ticks(task),
593 cputime_to_clock_t(gtime),
594 cputime_to_clock_t(cgtime));
Ingo Molnar8ea02602007-07-16 09:46:31 +0200595 if (mm)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 mmput(mm);
Eric W. Biedermanee992742008-02-08 04:18:31 -0800597 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598}
599
Eric W. Biedermanee992742008-02-08 04:18:31 -0800600int proc_tid_stat(struct seq_file *m, struct pid_namespace *ns,
601 struct pid *pid, struct task_struct *task)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602{
Eric W. Biedermanee992742008-02-08 04:18:31 -0800603 return do_task_stat(m, ns, pid, task, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604}
605
Eric W. Biedermanee992742008-02-08 04:18:31 -0800606int proc_tgid_stat(struct seq_file *m, struct pid_namespace *ns,
607 struct pid *pid, struct task_struct *task)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608{
Eric W. Biedermanee992742008-02-08 04:18:31 -0800609 return do_task_stat(m, ns, pid, task, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610}
611
Eric W. Biedermana56d3fc2008-02-08 04:18:32 -0800612int proc_pid_statm(struct seq_file *m, struct pid_namespace *ns,
613 struct pid *pid, struct task_struct *task)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614{
615 int size = 0, resident = 0, shared = 0, text = 0, lib = 0, data = 0;
616 struct mm_struct *mm = get_task_mm(task);
Ingo Molnar8ea02602007-07-16 09:46:31 +0200617
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618 if (mm) {
619 size = task_statm(mm, &shared, &text, &data, &resident);
620 mmput(mm);
621 }
Eric W. Biedermana56d3fc2008-02-08 04:18:32 -0800622 seq_printf(m, "%d %d %d %d %d %d %d\n",
623 size, resident, shared, text, lib, data, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624
Eric W. Biedermana56d3fc2008-02-08 04:18:32 -0800625 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700626}