Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
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. | |
526719ba | 43 | * <alan@lxorguk.ukuu.org.uk> |
1da177e4 LT |
44 | * |
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 | ||
1da177e4 LT |
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> | |
8ea02606 IM |
65 | #include <linux/uaccess.h> |
66 | #include <linux/io.h> | |
1da177e4 LT |
67 | #include <linux/mm.h> |
68 | #include <linux/hugetlb.h> | |
69 | #include <linux/pagemap.h> | |
70 | #include <linux/swap.h> | |
1da177e4 LT |
71 | #include <linux/smp.h> |
72 | #include <linux/signal.h> | |
73 | #include <linux/highmem.h> | |
74 | #include <linux/file.h> | |
9f3acc31 | 75 | #include <linux/fdtable.h> |
1da177e4 LT |
76 | #include <linux/times.h> |
77 | #include <linux/cpuset.h> | |
4fb3a538 | 78 | #include <linux/rcupdate.h> |
25890454 | 79 | #include <linux/delayacct.h> |
ee992744 | 80 | #include <linux/seq_file.h> |
b488893a | 81 | #include <linux/pid_namespace.h> |
f83ce3e6 | 82 | #include <linux/ptrace.h> |
0d094efe | 83 | #include <linux/tracehook.h> |
edc924e0 | 84 | #include <linux/string_helpers.h> |
ae2975bc | 85 | #include <linux/user_namespace.h> |
1da177e4 | 86 | |
1da177e4 | 87 | #include <asm/pgtable.h> |
1da177e4 LT |
88 | #include <asm/processor.h> |
89 | #include "internal.h" | |
90 | ||
df5f8314 | 91 | static inline void task_name(struct seq_file *m, struct task_struct *p) |
1da177e4 | 92 | { |
edc924e0 | 93 | char *buf; |
1da177e4 LT |
94 | char tcomm[sizeof(p->comm)]; |
95 | ||
96 | get_task_comm(tcomm, p); | |
97 | ||
9d6de12f | 98 | seq_puts(m, "Name:\t"); |
df5f8314 | 99 | buf = m->buf + m->count; |
edc924e0 AS |
100 | |
101 | /* Ignore error for now */ | |
102 | string_escape_str(tcomm, &buf, m->size - m->count, | |
103 | ESCAPE_SPACE | ESCAPE_SPECIAL, "\n\\"); | |
104 | ||
df5f8314 | 105 | m->count = buf - m->buf; |
9d6de12f | 106 | seq_putc(m, '\n'); |
1da177e4 LT |
107 | } |
108 | ||
109 | /* | |
110 | * The task state array is a strange "bitmap" of | |
111 | * reasons to sleep. Thus "running" is zero, and | |
112 | * you can test for combinations of others with | |
113 | * simple bit tests. | |
114 | */ | |
e130aa70 | 115 | static const char * const task_state_array[] = { |
e1781538 PZ |
116 | "R (running)", /* 0 */ |
117 | "S (sleeping)", /* 1 */ | |
118 | "D (disk sleep)", /* 2 */ | |
119 | "T (stopped)", /* 4 */ | |
120 | "t (tracing stop)", /* 8 */ | |
ad86622b ON |
121 | "X (dead)", /* 16 */ |
122 | "Z (zombie)", /* 32 */ | |
1da177e4 LT |
123 | }; |
124 | ||
8ea02606 | 125 | static inline const char *get_task_state(struct task_struct *tsk) |
1da177e4 | 126 | { |
74e37200 | 127 | unsigned int state = (tsk->state | tsk->exit_state) & TASK_REPORT; |
1da177e4 | 128 | |
74e37200 | 129 | BUILD_BUG_ON(1 + ilog2(TASK_REPORT) != ARRAY_SIZE(task_state_array)-1); |
e1781538 | 130 | |
74e37200 | 131 | return task_state_array[fls(state)]; |
1da177e4 LT |
132 | } |
133 | ||
df5f8314 EB |
134 | static inline void task_state(struct seq_file *m, struct pid_namespace *ns, |
135 | struct pid *pid, struct task_struct *p) | |
1da177e4 | 136 | { |
e9f238c3 | 137 | struct user_namespace *user_ns = seq_user_ns(m); |
1da177e4 LT |
138 | struct group_info *group_info; |
139 | int g; | |
abdba6e9 | 140 | struct task_struct *tracer; |
c69e8d9c | 141 | const struct cred *cred; |
abdba6e9 | 142 | pid_t ppid, tpid = 0, tgid, ngid; |
0f4a0d53 | 143 | unsigned int max_fds = 0; |
1da177e4 | 144 | |
b0fa9db6 | 145 | rcu_read_lock(); |
b488893a PE |
146 | ppid = pid_alive(p) ? |
147 | task_tgid_nr_ns(rcu_dereference(p->real_parent), ns) : 0; | |
abdba6e9 ON |
148 | |
149 | tracer = ptrace_parent(p); | |
150 | if (tracer) | |
151 | tpid = task_pid_nr_ns(tracer, ns); | |
b0fafc11 ON |
152 | |
153 | tgid = task_tgid_nr_ns(p, ns); | |
154 | ngid = task_numa_group_id(p); | |
de09a977 | 155 | cred = get_task_cred(p); |
0f4a0d53 ON |
156 | |
157 | task_lock(p); | |
158 | if (p->files) | |
159 | max_fds = files_fdtable(p->files)->max_fds; | |
160 | task_unlock(p); | |
b0fafc11 | 161 | rcu_read_unlock(); |
0f4a0d53 | 162 | |
df5f8314 | 163 | seq_printf(m, |
1da177e4 | 164 | "State:\t%s\n" |
1da177e4 | 165 | "Tgid:\t%d\n" |
e29cf08b | 166 | "Ngid:\t%d\n" |
1da177e4 LT |
167 | "Pid:\t%d\n" |
168 | "PPid:\t%d\n" | |
169 | "TracerPid:\t%d\n" | |
170 | "Uid:\t%d\t%d\t%d\t%d\n" | |
0f4a0d53 ON |
171 | "Gid:\t%d\t%d\t%d\t%d\n" |
172 | "FDSize:\t%d\nGroups:\t", | |
1da177e4 | 173 | get_task_state(p), |
b0fafc11 | 174 | tgid, ngid, pid_nr_ns(pid, ns), ppid, tpid, |
dcb0f222 EB |
175 | from_kuid_munged(user_ns, cred->uid), |
176 | from_kuid_munged(user_ns, cred->euid), | |
177 | from_kuid_munged(user_ns, cred->suid), | |
178 | from_kuid_munged(user_ns, cred->fsuid), | |
179 | from_kgid_munged(user_ns, cred->gid), | |
180 | from_kgid_munged(user_ns, cred->egid), | |
181 | from_kgid_munged(user_ns, cred->sgid), | |
0f4a0d53 ON |
182 | from_kgid_munged(user_ns, cred->fsgid), |
183 | max_fds); | |
1da177e4 | 184 | |
c69e8d9c | 185 | group_info = cred->group_info; |
8d238027 | 186 | for (g = 0; g < group_info->ngroups; g++) |
ae2975bc EB |
187 | seq_printf(m, "%d ", |
188 | from_kgid_munged(user_ns, GROUP_AT(group_info, g))); | |
c69e8d9c | 189 | put_cred(cred); |
1da177e4 | 190 | |
9d6de12f | 191 | seq_putc(m, '\n'); |
1da177e4 LT |
192 | } |
193 | ||
138d22b5 | 194 | void render_sigset_t(struct seq_file *m, const char *header, |
df5f8314 | 195 | sigset_t *set) |
1da177e4 | 196 | { |
df5f8314 | 197 | int i; |
1da177e4 | 198 | |
9d6de12f | 199 | seq_puts(m, header); |
1da177e4 LT |
200 | |
201 | i = _NSIG; | |
202 | do { | |
203 | int x = 0; | |
204 | ||
205 | i -= 4; | |
206 | if (sigismember(set, i+1)) x |= 1; | |
207 | if (sigismember(set, i+2)) x |= 2; | |
208 | if (sigismember(set, i+3)) x |= 4; | |
209 | if (sigismember(set, i+4)) x |= 8; | |
df5f8314 | 210 | seq_printf(m, "%x", x); |
1da177e4 LT |
211 | } while (i >= 4); |
212 | ||
9d6de12f | 213 | seq_putc(m, '\n'); |
1da177e4 LT |
214 | } |
215 | ||
216 | static void collect_sigign_sigcatch(struct task_struct *p, sigset_t *ign, | |
217 | sigset_t *catch) | |
218 | { | |
219 | struct k_sigaction *k; | |
220 | int i; | |
221 | ||
222 | k = p->sighand->action; | |
223 | for (i = 1; i <= _NSIG; ++i, ++k) { | |
224 | if (k->sa.sa_handler == SIG_IGN) | |
225 | sigaddset(ign, i); | |
226 | else if (k->sa.sa_handler != SIG_DFL) | |
227 | sigaddset(catch, i); | |
228 | } | |
229 | } | |
230 | ||
df5f8314 | 231 | static inline void task_sig(struct seq_file *m, struct task_struct *p) |
1da177e4 | 232 | { |
5e6b3f42 | 233 | unsigned long flags; |
1da177e4 LT |
234 | sigset_t pending, shpending, blocked, ignored, caught; |
235 | int num_threads = 0; | |
236 | unsigned long qsize = 0; | |
237 | unsigned long qlim = 0; | |
238 | ||
239 | sigemptyset(&pending); | |
240 | sigemptyset(&shpending); | |
241 | sigemptyset(&blocked); | |
242 | sigemptyset(&ignored); | |
243 | sigemptyset(&caught); | |
244 | ||
5e6b3f42 | 245 | if (lock_task_sighand(p, &flags)) { |
1da177e4 LT |
246 | pending = p->pending.signal; |
247 | shpending = p->signal->shared_pending.signal; | |
248 | blocked = p->blocked; | |
249 | collect_sigign_sigcatch(p, &ignored, &caught); | |
7e49827c | 250 | num_threads = get_nr_threads(p); |
7dc52157 | 251 | rcu_read_lock(); /* FIXME: is this correct? */ |
c69e8d9c | 252 | qsize = atomic_read(&__task_cred(p)->user->sigpending); |
7dc52157 | 253 | rcu_read_unlock(); |
d554ed89 | 254 | qlim = task_rlimit(p, RLIMIT_SIGPENDING); |
5e6b3f42 | 255 | unlock_task_sighand(p, &flags); |
1da177e4 | 256 | } |
1da177e4 | 257 | |
df5f8314 EB |
258 | seq_printf(m, "Threads:\t%d\n", num_threads); |
259 | seq_printf(m, "SigQ:\t%lu/%lu\n", qsize, qlim); | |
1da177e4 LT |
260 | |
261 | /* render them all */ | |
df5f8314 EB |
262 | render_sigset_t(m, "SigPnd:\t", &pending); |
263 | render_sigset_t(m, "ShdPnd:\t", &shpending); | |
264 | render_sigset_t(m, "SigBlk:\t", &blocked); | |
265 | render_sigset_t(m, "SigIgn:\t", &ignored); | |
266 | render_sigset_t(m, "SigCgt:\t", &caught); | |
1da177e4 LT |
267 | } |
268 | ||
df5f8314 EB |
269 | static void render_cap_t(struct seq_file *m, const char *header, |
270 | kernel_cap_t *a) | |
e338d263 AM |
271 | { |
272 | unsigned __capi; | |
273 | ||
9d6de12f | 274 | seq_puts(m, header); |
e338d263 | 275 | CAP_FOR_EACH_U32(__capi) { |
df5f8314 | 276 | seq_printf(m, "%08x", |
7d8b6c63 | 277 | a->cap[CAP_LAST_U32 - __capi]); |
e338d263 | 278 | } |
9d6de12f | 279 | seq_putc(m, '\n'); |
e338d263 AM |
280 | } |
281 | ||
df5f8314 | 282 | static inline void task_cap(struct seq_file *m, struct task_struct *p) |
1da177e4 | 283 | { |
c69e8d9c DH |
284 | const struct cred *cred; |
285 | kernel_cap_t cap_inheritable, cap_permitted, cap_effective, cap_bset; | |
b6dff3ec | 286 | |
c69e8d9c DH |
287 | rcu_read_lock(); |
288 | cred = __task_cred(p); | |
289 | cap_inheritable = cred->cap_inheritable; | |
290 | cap_permitted = cred->cap_permitted; | |
291 | cap_effective = cred->cap_effective; | |
292 | cap_bset = cred->cap_bset; | |
293 | rcu_read_unlock(); | |
294 | ||
295 | render_cap_t(m, "CapInh:\t", &cap_inheritable); | |
296 | render_cap_t(m, "CapPrm:\t", &cap_permitted); | |
297 | render_cap_t(m, "CapEff:\t", &cap_effective); | |
298 | render_cap_t(m, "CapBnd:\t", &cap_bset); | |
1da177e4 LT |
299 | } |
300 | ||
2f4b3bf6 KC |
301 | static inline void task_seccomp(struct seq_file *m, struct task_struct *p) |
302 | { | |
303 | #ifdef CONFIG_SECCOMP | |
304 | seq_printf(m, "Seccomp:\t%d\n", p->seccomp.mode); | |
305 | #endif | |
306 | } | |
307 | ||
df5f8314 EB |
308 | static inline void task_context_switch_counts(struct seq_file *m, |
309 | struct task_struct *p) | |
b663a79c | 310 | { |
df5f8314 EB |
311 | seq_printf(m, "voluntary_ctxt_switches:\t%lu\n" |
312 | "nonvoluntary_ctxt_switches:\t%lu\n", | |
313 | p->nvcsw, | |
314 | p->nivcsw); | |
b663a79c MU |
315 | } |
316 | ||
d01d4827 HC |
317 | static void task_cpus_allowed(struct seq_file *m, struct task_struct *task) |
318 | { | |
a0c2e07d TH |
319 | seq_printf(m, "Cpus_allowed:\t%*pb\n", |
320 | cpumask_pr_args(&task->cpus_allowed)); | |
321 | seq_printf(m, "Cpus_allowed_list:\t%*pbl\n", | |
322 | cpumask_pr_args(&task->cpus_allowed)); | |
d01d4827 HC |
323 | } |
324 | ||
df5f8314 EB |
325 | int proc_pid_status(struct seq_file *m, struct pid_namespace *ns, |
326 | struct pid *pid, struct task_struct *task) | |
1da177e4 | 327 | { |
1da177e4 LT |
328 | struct mm_struct *mm = get_task_mm(task); |
329 | ||
df5f8314 EB |
330 | task_name(m, task); |
331 | task_state(m, ns, pid, task); | |
8ea02606 | 332 | |
1da177e4 | 333 | if (mm) { |
df5f8314 | 334 | task_mem(m, mm); |
1da177e4 LT |
335 | mmput(mm); |
336 | } | |
df5f8314 EB |
337 | task_sig(m, task); |
338 | task_cap(m, task); | |
2f4b3bf6 | 339 | task_seccomp(m, task); |
d01d4827 | 340 | task_cpus_allowed(m, task); |
df5f8314 | 341 | cpuset_task_status_allowed(m, task); |
df5f8314 EB |
342 | task_context_switch_counts(m, task); |
343 | return 0; | |
1da177e4 LT |
344 | } |
345 | ||
ee992744 EB |
346 | static int do_task_stat(struct seq_file *m, struct pid_namespace *ns, |
347 | struct pid *pid, struct task_struct *task, int whole) | |
1da177e4 LT |
348 | { |
349 | unsigned long vsize, eip, esp, wchan = ~0UL; | |
715be1fc | 350 | int priority, nice; |
1da177e4 LT |
351 | int tty_pgrp = -1, tty_nr = 0; |
352 | sigset_t sigign, sigcatch; | |
353 | char state; | |
8ea02606 | 354 | pid_t ppid = 0, pgid = -1, sid = -1; |
1da177e4 | 355 | int num_threads = 0; |
f83ce3e6 | 356 | int permitted; |
1da177e4 LT |
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; | |
efe567fc | 361 | cputime_t cutime, cstime, utime, stime; |
9ac52315 | 362 | cputime_t cgtime, gtime; |
1da177e4 | 363 | unsigned long rsslim = 0; |
1da177e4 | 364 | char tcomm[sizeof(task->comm)]; |
a593d6ed | 365 | unsigned long flags; |
1da177e4 LT |
366 | |
367 | state = *get_task_state(task); | |
368 | vsize = eip = esp = 0; | |
69f594a3 | 369 | permitted = ptrace_may_access(task, PTRACE_MODE_READ | PTRACE_MODE_NOAUDIT); |
1da177e4 LT |
370 | mm = get_task_mm(task); |
371 | if (mm) { | |
372 | vsize = task_vsize(mm); | |
f83ce3e6 JE |
373 | if (permitted) { |
374 | eip = KSTK_EIP(task); | |
375 | esp = KSTK_ESP(task); | |
376 | } | |
1da177e4 LT |
377 | } |
378 | ||
379 | get_task_comm(tcomm, task); | |
380 | ||
381 | sigemptyset(&sigign); | |
382 | sigemptyset(&sigcatch); | |
64861634 MS |
383 | cutime = cstime = utime = stime = 0; |
384 | cgtime = gtime = 0; | |
3cfd0885 | 385 | |
a593d6ed ON |
386 | if (lock_task_sighand(task, &flags)) { |
387 | struct signal_struct *sig = task->signal; | |
91593504 ON |
388 | |
389 | if (sig->tty) { | |
5d0fdf1e AC |
390 | struct pid *pgrp = tty_get_pgrp(sig->tty); |
391 | tty_pgrp = pid_nr_ns(pgrp, ns); | |
392 | put_pid(pgrp); | |
91593504 | 393 | tty_nr = new_encode_dev(tty_devnum(sig->tty)); |
a593d6ed ON |
394 | } |
395 | ||
7e49827c | 396 | num_threads = get_nr_threads(task); |
1da177e4 LT |
397 | collect_sigign_sigcatch(task, &sigign, &sigcatch); |
398 | ||
a593d6ed ON |
399 | cmin_flt = sig->cmin_flt; |
400 | cmaj_flt = sig->cmaj_flt; | |
401 | cutime = sig->cutime; | |
402 | cstime = sig->cstime; | |
9ac52315 | 403 | cgtime = sig->cgtime; |
d554ed89 | 404 | rsslim = ACCESS_ONCE(sig->rlim[RLIMIT_RSS].rlim_cur); |
a593d6ed | 405 | |
1da177e4 LT |
406 | /* add up live thread stats at the group level */ |
407 | if (whole) { | |
a593d6ed | 408 | struct task_struct *t = task; |
1da177e4 LT |
409 | do { |
410 | min_flt += t->min_flt; | |
411 | maj_flt += t->maj_flt; | |
6fac4829 | 412 | gtime += task_gtime(t); |
185ee40e | 413 | } while_each_thread(task, t); |
1da177e4 | 414 | |
a593d6ed ON |
415 | min_flt += sig->min_flt; |
416 | maj_flt += sig->maj_flt; | |
e80d0a1a | 417 | thread_group_cputime_adjusted(task, &utime, &stime); |
64861634 | 418 | gtime += sig->gtime; |
1da177e4 | 419 | } |
a593d6ed | 420 | |
b488893a | 421 | sid = task_session_nr_ns(task, ns); |
a98fdcef | 422 | ppid = task_tgid_nr_ns(task->real_parent, ns); |
b488893a | 423 | pgid = task_pgrp_nr_ns(task, ns); |
a593d6ed ON |
424 | |
425 | unlock_task_sighand(task, &flags); | |
1da177e4 | 426 | } |
1da177e4 | 427 | |
f83ce3e6 | 428 | if (permitted && (!whole || num_threads < 2)) |
1da177e4 LT |
429 | wchan = get_wchan(task); |
430 | if (!whole) { | |
431 | min_flt = task->min_flt; | |
432 | maj_flt = task->maj_flt; | |
e80d0a1a | 433 | task_cputime_adjusted(task, &utime, &stime); |
6fac4829 | 434 | gtime = task_gtime(task); |
1da177e4 LT |
435 | } |
436 | ||
437 | /* scale priority and nice values from timeslices to -20..20 */ | |
438 | /* to make it look like a "normal" Unix priority/nice value */ | |
439 | priority = task_prio(task); | |
440 | nice = task_nice(task); | |
441 | ||
1da177e4 | 442 | /* convert nsec -> ticks */ |
57e0be04 | 443 | start_time = nsec_to_clock_t(task->real_start_time); |
1da177e4 | 444 | |
bda7bad6 KH |
445 | seq_printf(m, "%d (%s) %c", pid_nr_ns(pid, ns), tcomm, state); |
446 | seq_put_decimal_ll(m, ' ', ppid); | |
447 | seq_put_decimal_ll(m, ' ', pgid); | |
448 | seq_put_decimal_ll(m, ' ', sid); | |
449 | seq_put_decimal_ll(m, ' ', tty_nr); | |
450 | seq_put_decimal_ll(m, ' ', tty_pgrp); | |
451 | seq_put_decimal_ull(m, ' ', task->flags); | |
452 | seq_put_decimal_ull(m, ' ', min_flt); | |
453 | seq_put_decimal_ull(m, ' ', cmin_flt); | |
454 | seq_put_decimal_ull(m, ' ', maj_flt); | |
455 | seq_put_decimal_ull(m, ' ', cmaj_flt); | |
456 | seq_put_decimal_ull(m, ' ', cputime_to_clock_t(utime)); | |
457 | seq_put_decimal_ull(m, ' ', cputime_to_clock_t(stime)); | |
458 | seq_put_decimal_ll(m, ' ', cputime_to_clock_t(cutime)); | |
459 | seq_put_decimal_ll(m, ' ', cputime_to_clock_t(cstime)); | |
460 | seq_put_decimal_ll(m, ' ', priority); | |
461 | seq_put_decimal_ll(m, ' ', nice); | |
462 | seq_put_decimal_ll(m, ' ', num_threads); | |
463 | seq_put_decimal_ull(m, ' ', 0); | |
464 | seq_put_decimal_ull(m, ' ', start_time); | |
465 | seq_put_decimal_ull(m, ' ', vsize); | |
715be1fc | 466 | seq_put_decimal_ull(m, ' ', mm ? get_mm_rss(mm) : 0); |
bda7bad6 KH |
467 | seq_put_decimal_ull(m, ' ', rsslim); |
468 | seq_put_decimal_ull(m, ' ', mm ? (permitted ? mm->start_code : 1) : 0); | |
469 | seq_put_decimal_ull(m, ' ', mm ? (permitted ? mm->end_code : 1) : 0); | |
470 | seq_put_decimal_ull(m, ' ', (permitted && mm) ? mm->start_stack : 0); | |
471 | seq_put_decimal_ull(m, ' ', esp); | |
472 | seq_put_decimal_ull(m, ' ', eip); | |
473 | /* The signal information here is obsolete. | |
474 | * It must be decimal for Linux 2.0 compatibility. | |
475 | * Use /proc/#/status for real-time signals. | |
476 | */ | |
477 | seq_put_decimal_ull(m, ' ', task->pending.signal.sig[0] & 0x7fffffffUL); | |
478 | seq_put_decimal_ull(m, ' ', task->blocked.sig[0] & 0x7fffffffUL); | |
479 | seq_put_decimal_ull(m, ' ', sigign.sig[0] & 0x7fffffffUL); | |
480 | seq_put_decimal_ull(m, ' ', sigcatch.sig[0] & 0x7fffffffUL); | |
481 | seq_put_decimal_ull(m, ' ', wchan); | |
482 | seq_put_decimal_ull(m, ' ', 0); | |
483 | seq_put_decimal_ull(m, ' ', 0); | |
484 | seq_put_decimal_ll(m, ' ', task->exit_signal); | |
485 | seq_put_decimal_ll(m, ' ', task_cpu(task)); | |
486 | seq_put_decimal_ull(m, ' ', task->rt_priority); | |
487 | seq_put_decimal_ull(m, ' ', task->policy); | |
488 | seq_put_decimal_ull(m, ' ', delayacct_blkio_ticks(task)); | |
489 | seq_put_decimal_ull(m, ' ', cputime_to_clock_t(gtime)); | |
490 | seq_put_decimal_ll(m, ' ', cputime_to_clock_t(cgtime)); | |
5b172087 CG |
491 | |
492 | if (mm && permitted) { | |
493 | seq_put_decimal_ull(m, ' ', mm->start_data); | |
494 | seq_put_decimal_ull(m, ' ', mm->end_data); | |
495 | seq_put_decimal_ull(m, ' ', mm->start_brk); | |
496 | seq_put_decimal_ull(m, ' ', mm->arg_start); | |
497 | seq_put_decimal_ull(m, ' ', mm->arg_end); | |
498 | seq_put_decimal_ull(m, ' ', mm->env_start); | |
499 | seq_put_decimal_ull(m, ' ', mm->env_end); | |
500 | } else | |
501 | seq_printf(m, " 0 0 0 0 0 0 0"); | |
502 | ||
503 | if (permitted) | |
504 | seq_put_decimal_ll(m, ' ', task->exit_code); | |
505 | else | |
506 | seq_put_decimal_ll(m, ' ', 0); | |
507 | ||
bda7bad6 | 508 | seq_putc(m, '\n'); |
8ea02606 | 509 | if (mm) |
1da177e4 | 510 | mmput(mm); |
ee992744 | 511 | return 0; |
1da177e4 LT |
512 | } |
513 | ||
ee992744 EB |
514 | int proc_tid_stat(struct seq_file *m, struct pid_namespace *ns, |
515 | struct pid *pid, struct task_struct *task) | |
1da177e4 | 516 | { |
ee992744 | 517 | return do_task_stat(m, ns, pid, task, 0); |
1da177e4 LT |
518 | } |
519 | ||
ee992744 EB |
520 | int proc_tgid_stat(struct seq_file *m, struct pid_namespace *ns, |
521 | struct pid *pid, struct task_struct *task) | |
1da177e4 | 522 | { |
ee992744 | 523 | return do_task_stat(m, ns, pid, task, 1); |
1da177e4 LT |
524 | } |
525 | ||
a56d3fc7 EB |
526 | int proc_pid_statm(struct seq_file *m, struct pid_namespace *ns, |
527 | struct pid *pid, struct task_struct *task) | |
1da177e4 | 528 | { |
a2ade7b6 | 529 | unsigned long size = 0, resident = 0, shared = 0, text = 0, data = 0; |
1da177e4 | 530 | struct mm_struct *mm = get_task_mm(task); |
8ea02606 | 531 | |
1da177e4 LT |
532 | if (mm) { |
533 | size = task_statm(mm, &shared, &text, &data, &resident); | |
534 | mmput(mm); | |
535 | } | |
bda7bad6 KH |
536 | /* |
537 | * For quick read, open code by putting numbers directly | |
538 | * expected format is | |
539 | * seq_printf(m, "%lu %lu %lu %lu 0 %lu 0\n", | |
540 | * size, resident, shared, text, data); | |
541 | */ | |
542 | seq_put_decimal_ull(m, 0, size); | |
543 | seq_put_decimal_ull(m, ' ', resident); | |
544 | seq_put_decimal_ull(m, ' ', shared); | |
545 | seq_put_decimal_ull(m, ' ', text); | |
546 | seq_put_decimal_ull(m, ' ', 0); | |
3748b2f1 | 547 | seq_put_decimal_ull(m, ' ', data); |
bda7bad6 KH |
548 | seq_put_decimal_ull(m, ' ', 0); |
549 | seq_putc(m, '\n'); | |
1da177e4 | 550 | |
a56d3fc7 | 551 | return 0; |
1da177e4 | 552 | } |
81841161 CG |
553 | |
554 | #ifdef CONFIG_CHECKPOINT_RESTORE | |
555 | static struct pid * | |
556 | get_children_pid(struct inode *inode, struct pid *pid_prev, loff_t pos) | |
557 | { | |
558 | struct task_struct *start, *task; | |
559 | struct pid *pid = NULL; | |
560 | ||
561 | read_lock(&tasklist_lock); | |
562 | ||
563 | start = pid_task(proc_pid(inode), PIDTYPE_PID); | |
564 | if (!start) | |
565 | goto out; | |
566 | ||
567 | /* | |
568 | * Lets try to continue searching first, this gives | |
569 | * us significant speedup on children-rich processes. | |
570 | */ | |
571 | if (pid_prev) { | |
572 | task = pid_task(pid_prev, PIDTYPE_PID); | |
573 | if (task && task->real_parent == start && | |
574 | !(list_empty(&task->sibling))) { | |
575 | if (list_is_last(&task->sibling, &start->children)) | |
576 | goto out; | |
577 | task = list_first_entry(&task->sibling, | |
578 | struct task_struct, sibling); | |
579 | pid = get_pid(task_pid(task)); | |
580 | goto out; | |
581 | } | |
582 | } | |
583 | ||
584 | /* | |
585 | * Slow search case. | |
586 | * | |
587 | * We might miss some children here if children | |
588 | * are exited while we were not holding the lock, | |
589 | * but it was never promised to be accurate that | |
590 | * much. | |
591 | * | |
592 | * "Just suppose that the parent sleeps, but N children | |
593 | * exit after we printed their tids. Now the slow paths | |
594 | * skips N extra children, we miss N tasks." (c) | |
595 | * | |
596 | * So one need to stop or freeze the leader and all | |
597 | * its children to get a precise result. | |
598 | */ | |
599 | list_for_each_entry(task, &start->children, sibling) { | |
600 | if (pos-- == 0) { | |
601 | pid = get_pid(task_pid(task)); | |
602 | break; | |
603 | } | |
604 | } | |
605 | ||
606 | out: | |
607 | read_unlock(&tasklist_lock); | |
608 | return pid; | |
609 | } | |
610 | ||
611 | static int children_seq_show(struct seq_file *seq, void *v) | |
612 | { | |
613 | struct inode *inode = seq->private; | |
614 | pid_t pid; | |
615 | ||
616 | pid = pid_nr_ns(v, inode->i_sb->s_fs_info); | |
617 | return seq_printf(seq, "%d ", pid); | |
618 | } | |
619 | ||
620 | static void *children_seq_start(struct seq_file *seq, loff_t *pos) | |
621 | { | |
622 | return get_children_pid(seq->private, NULL, *pos); | |
623 | } | |
624 | ||
625 | static void *children_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
626 | { | |
627 | struct pid *pid; | |
628 | ||
629 | pid = get_children_pid(seq->private, v, *pos + 1); | |
630 | put_pid(v); | |
631 | ||
632 | ++*pos; | |
633 | return pid; | |
634 | } | |
635 | ||
636 | static void children_seq_stop(struct seq_file *seq, void *v) | |
637 | { | |
638 | put_pid(v); | |
639 | } | |
640 | ||
641 | static const struct seq_operations children_seq_ops = { | |
642 | .start = children_seq_start, | |
643 | .next = children_seq_next, | |
644 | .stop = children_seq_stop, | |
645 | .show = children_seq_show, | |
646 | }; | |
647 | ||
648 | static int children_seq_open(struct inode *inode, struct file *file) | |
649 | { | |
650 | struct seq_file *m; | |
651 | int ret; | |
652 | ||
653 | ret = seq_open(file, &children_seq_ops); | |
654 | if (ret) | |
655 | return ret; | |
656 | ||
657 | m = file->private_data; | |
658 | m->private = inode; | |
659 | ||
660 | return ret; | |
661 | } | |
662 | ||
663 | int children_seq_release(struct inode *inode, struct file *file) | |
664 | { | |
665 | seq_release(inode, file); | |
666 | return 0; | |
667 | } | |
668 | ||
669 | const struct file_operations proc_tid_children_operations = { | |
670 | .open = children_seq_open, | |
671 | .read = seq_read, | |
672 | .llseek = seq_lseek, | |
673 | .release = children_seq_release, | |
674 | }; | |
675 | #endif /* CONFIG_CHECKPOINT_RESTORE */ |